]> git.openstreetmap.org Git - rails.git/blobdiff - vendor/assets/iD/iD.js
Update to iD v2.20.3
[rails.git] / vendor / assets / iD / iD.js
index 39fe8cf274e20073e03ebd7da0449935c9431415..c919159407740a8143ed6588373aa7407af9ec24 100644 (file)
@@ -2,39 +2,24 @@
 
        var commonjsGlobal = typeof globalThis !== 'undefined' ? globalThis : typeof window !== 'undefined' ? window : typeof global !== 'undefined' ? global : typeof self !== 'undefined' ? self : {};
 
-       function getDefaultExportFromCjs (x) {
-               return x && x.__esModule && Object.prototype.hasOwnProperty.call(x, 'default') ? x['default'] : x;
-       }
-
-       function createCommonjsModule(fn, basedir, module) {
-               return module = {
-                       path: basedir,
-                       exports: {},
-                       require: function (path, base) {
-                               return commonjsRequire(path, (base === undefined || base === null) ? module.path : base);
-                       }
-               }, fn(module, module.exports), module.exports;
-       }
-
-       function commonjsRequire () {
-               throw new Error('Dynamic requires are not currently supported by @rollup/plugin-commonjs');
-       }
-
        var check = function (it) {
          return it && it.Math == Math && it;
        };
 
        // https://github.com/zloirock/core-js/issues/86#issuecomment-115759028
-       var global_1 =
-         // eslint-disable-next-line no-undef
+       var global$1m =
+         // eslint-disable-next-line es/no-global-this -- safe
          check(typeof globalThis == 'object' && globalThis) ||
          check(typeof window == 'object' && window) ||
+         // eslint-disable-next-line no-restricted-globals -- safe
          check(typeof self == 'object' && self) ||
          check(typeof commonjsGlobal == 'object' && commonjsGlobal) ||
-         // eslint-disable-next-line no-new-func
-         Function('return this')();
+         // eslint-disable-next-line no-new-func -- fallback
+         (function () { return this; })() || Function('return this')();
 
-       var fails = function (exec) {
+       var objectGetOwnPropertyDescriptor = {};
+
+       var fails$S = function (exec) {
          try {
            return !!exec();
          } catch (error) {
          }
        };
 
-       // Thank's IE8 for his funny defineProperty
-       var descriptors = !fails(function () {
+       var fails$R = fails$S;
+
+       // Detect IE8's incomplete defineProperty implementation
+       var descriptors = !fails$R(function () {
+         // eslint-disable-next-line es/no-object-defineproperty -- required for testing
          return Object.defineProperty({}, 1, { get: function () { return 7; } })[1] != 7;
        });
 
-       var nativePropertyIsEnumerable = {}.propertyIsEnumerable;
-       var getOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
+       var call$q = Function.prototype.call;
+
+       var functionCall = call$q.bind ? call$q.bind(call$q) : function () {
+         return call$q.apply(call$q, arguments);
+       };
+
+       var objectPropertyIsEnumerable = {};
+
+       var $propertyIsEnumerable$2 = {}.propertyIsEnumerable;
+       // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+       var getOwnPropertyDescriptor$5 = Object.getOwnPropertyDescriptor;
 
        // Nashorn ~ JDK8 bug
-       var NASHORN_BUG = getOwnPropertyDescriptor && !nativePropertyIsEnumerable.call({ 1: 2 }, 1);
+       var NASHORN_BUG = getOwnPropertyDescriptor$5 && !$propertyIsEnumerable$2.call({ 1: 2 }, 1);
 
        // `Object.prototype.propertyIsEnumerable` method implementation
-       // https://tc39.github.io/ecma262/#sec-object.prototype.propertyisenumerable
-       var f = NASHORN_BUG ? function propertyIsEnumerable(V) {
-         var descriptor = getOwnPropertyDescriptor(this, V);
+       // https://tc39.es/ecma262/#sec-object.prototype.propertyisenumerable
+       objectPropertyIsEnumerable.f = NASHORN_BUG ? function propertyIsEnumerable(V) {
+         var descriptor = getOwnPropertyDescriptor$5(this, V);
          return !!descriptor && descriptor.enumerable;
-       } : nativePropertyIsEnumerable;
-
-       var objectPropertyIsEnumerable = {
-               f: f
-       };
+       } : $propertyIsEnumerable$2;
 
-       var createPropertyDescriptor = function (bitmap, value) {
+       var createPropertyDescriptor$7 = function (bitmap, value) {
          return {
            enumerable: !(bitmap & 1),
            configurable: !(bitmap & 2),
          };
        };
 
-       var toString = {}.toString;
+       var FunctionPrototype$3 = Function.prototype;
+       var bind$h = FunctionPrototype$3.bind;
+       var call$p = FunctionPrototype$3.call;
+       var callBind = bind$h && bind$h.bind(call$p);
+
+       var functionUncurryThis = bind$h ? function (fn) {
+         return fn && callBind(call$p, fn);
+       } : function (fn) {
+         return fn && function () {
+           return call$p.apply(fn, arguments);
+         };
+       };
+
+       var uncurryThis$X = functionUncurryThis;
+
+       var toString$n = uncurryThis$X({}.toString);
+       var stringSlice$c = uncurryThis$X(''.slice);
 
-       var classofRaw = function (it) {
-         return toString.call(it).slice(8, -1);
+       var classofRaw$1 = function (it) {
+         return stringSlice$c(toString$n(it), 8, -1);
        };
 
-       var split = ''.split;
+       var global$1l = global$1m;
+       var uncurryThis$W = functionUncurryThis;
+       var fails$Q = fails$S;
+       var classof$e = classofRaw$1;
+
+       var Object$5 = global$1l.Object;
+       var split$4 = uncurryThis$W(''.split);
 
        // fallback for non-array-like ES3 and non-enumerable old V8 strings
-       var indexedObject = fails(function () {
+       var indexedObject = fails$Q(function () {
          // throws an error in rhino, see https://github.com/mozilla/rhino/issues/346
-         // eslint-disable-next-line no-prototype-builtins
-         return !Object('z').propertyIsEnumerable(0);
+         // eslint-disable-next-line no-prototype-builtins -- safe
+         return !Object$5('z').propertyIsEnumerable(0);
        }) ? function (it) {
-         return classofRaw(it) == 'String' ? split.call(it, '') : Object(it);
-       } : Object;
+         return classof$e(it) == 'String' ? split$4(it, '') : Object$5(it);
+       } : Object$5;
+
+       var global$1k = global$1m;
+
+       var TypeError$o = global$1k.TypeError;
 
        // `RequireObjectCoercible` abstract operation
-       // https://tc39.github.io/ecma262/#sec-requireobjectcoercible
-       var requireObjectCoercible = function (it) {
-         if (it == undefined) throw TypeError("Can't call method on " + it);
+       // https://tc39.es/ecma262/#sec-requireobjectcoercible
+       var requireObjectCoercible$e = function (it) {
+         if (it == undefined) throw TypeError$o("Can't call method on " + it);
          return it;
        };
 
        // toObject with fallback for non-array-like ES3 strings
+       var IndexedObject$4 = indexedObject;
+       var requireObjectCoercible$d = requireObjectCoercible$e;
+
+       var toIndexedObject$c = function (it) {
+         return IndexedObject$4(requireObjectCoercible$d(it));
+       };
 
+       // `IsCallable` abstract operation
+       // https://tc39.es/ecma262/#sec-iscallable
+       var isCallable$r = function (argument) {
+         return typeof argument == 'function';
+       };
 
+       var isCallable$q = isCallable$r;
 
-       var toIndexedObject = function (it) {
-         return indexedObject(requireObjectCoercible(it));
+       var isObject$s = function (it) {
+         return typeof it == 'object' ? it !== null : isCallable$q(it);
        };
 
-       var isObject = function (it) {
-         return typeof it === 'object' ? it !== null : typeof it === 'function';
+       var global$1j = global$1m;
+       var isCallable$p = isCallable$r;
+
+       var aFunction = function (argument) {
+         return isCallable$p(argument) ? argument : undefined;
        };
 
-       // `ToPrimitive` abstract operation
-       // https://tc39.github.io/ecma262/#sec-toprimitive
-       // instead of the ES6 spec version, we didn't implement @@toPrimitive case
-       // and the second argument - flag - preferred type is a string
-       var toPrimitive = function (input, PREFERRED_STRING) {
-         if (!isObject(input)) return input;
+       var getBuiltIn$b = function (namespace, method) {
+         return arguments.length < 2 ? aFunction(global$1j[namespace]) : global$1j[namespace] && global$1j[namespace][method];
+       };
+
+       var uncurryThis$V = functionUncurryThis;
+
+       var objectIsPrototypeOf = uncurryThis$V({}.isPrototypeOf);
+
+       var getBuiltIn$a = getBuiltIn$b;
+
+       var engineUserAgent = getBuiltIn$a('navigator', 'userAgent') || '';
+
+       var global$1i = global$1m;
+       var userAgent$7 = engineUserAgent;
+
+       var process$4 = global$1i.process;
+       var Deno = global$1i.Deno;
+       var versions = process$4 && process$4.versions || Deno && Deno.version;
+       var v8 = versions && versions.v8;
+       var match, version$1;
+
+       if (v8) {
+         match = v8.split('.');
+         // in old Chrome, versions of V8 isn't V8 = Chrome / 10
+         // but their correct versions are not interesting for us
+         version$1 = match[0] > 0 && match[0] < 4 ? 1 : +(match[0] + match[1]);
+       }
+
+       // BrowserFS NodeJS `process` polyfill incorrectly set `.v8` to `0.0`
+       // so check `userAgent` even if `.v8` exists, but 0
+       if (!version$1 && userAgent$7) {
+         match = userAgent$7.match(/Edge\/(\d+)/);
+         if (!match || match[1] >= 74) {
+           match = userAgent$7.match(/Chrome\/(\d+)/);
+           if (match) version$1 = +match[1];
+         }
+       }
+
+       var engineV8Version = version$1;
+
+       /* eslint-disable es/no-symbol -- required for testing */
+
+       var V8_VERSION$3 = engineV8Version;
+       var fails$P = fails$S;
+
+       // eslint-disable-next-line es/no-object-getownpropertysymbols -- required for testing
+       var nativeSymbol = !!Object.getOwnPropertySymbols && !fails$P(function () {
+         var symbol = Symbol();
+         // Chrome 38 Symbol has incorrect toString conversion
+         // `get-own-property-symbols` polyfill symbols converted to object are not Symbol instances
+         return !String(symbol) || !(Object(symbol) instanceof Symbol) ||
+           // Chrome 38-40 symbols are not inherited from DOM collections prototypes to instances
+           !Symbol.sham && V8_VERSION$3 && V8_VERSION$3 < 41;
+       });
+
+       /* eslint-disable es/no-symbol -- required for testing */
+
+       var NATIVE_SYMBOL$3 = nativeSymbol;
+
+       var useSymbolAsUid = NATIVE_SYMBOL$3
+         && !Symbol.sham
+         && typeof Symbol.iterator == 'symbol';
+
+       var global$1h = global$1m;
+       var getBuiltIn$9 = getBuiltIn$b;
+       var isCallable$o = isCallable$r;
+       var isPrototypeOf$9 = objectIsPrototypeOf;
+       var USE_SYMBOL_AS_UID$1 = useSymbolAsUid;
+
+       var Object$4 = global$1h.Object;
+
+       var isSymbol$6 = USE_SYMBOL_AS_UID$1 ? function (it) {
+         return typeof it == 'symbol';
+       } : function (it) {
+         var $Symbol = getBuiltIn$9('Symbol');
+         return isCallable$o($Symbol) && isPrototypeOf$9($Symbol.prototype, Object$4(it));
+       };
+
+       var global$1g = global$1m;
+
+       var String$6 = global$1g.String;
+
+       var tryToString$5 = function (argument) {
+         try {
+           return String$6(argument);
+         } catch (error) {
+           return 'Object';
+         }
+       };
+
+       var global$1f = global$1m;
+       var isCallable$n = isCallable$r;
+       var tryToString$4 = tryToString$5;
+
+       var TypeError$n = global$1f.TypeError;
+
+       // `Assert: IsCallable(argument) is true`
+       var aCallable$a = function (argument) {
+         if (isCallable$n(argument)) return argument;
+         throw TypeError$n(tryToString$4(argument) + ' is not a function');
+       };
+
+       var aCallable$9 = aCallable$a;
+
+       // `GetMethod` abstract operation
+       // https://tc39.es/ecma262/#sec-getmethod
+       var getMethod$7 = function (V, P) {
+         var func = V[P];
+         return func == null ? undefined : aCallable$9(func);
+       };
+
+       var global$1e = global$1m;
+       var call$o = functionCall;
+       var isCallable$m = isCallable$r;
+       var isObject$r = isObject$s;
+
+       var TypeError$m = global$1e.TypeError;
+
+       // `OrdinaryToPrimitive` abstract operation
+       // https://tc39.es/ecma262/#sec-ordinarytoprimitive
+       var ordinaryToPrimitive$1 = function (input, pref) {
          var fn, val;
-         if (PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
-         if (typeof (fn = input.valueOf) == 'function' && !isObject(val = fn.call(input))) return val;
-         if (!PREFERRED_STRING && typeof (fn = input.toString) == 'function' && !isObject(val = fn.call(input))) return val;
-         throw TypeError("Can't convert object to primitive value");
+         if (pref === 'string' && isCallable$m(fn = input.toString) && !isObject$r(val = call$o(fn, input))) return val;
+         if (isCallable$m(fn = input.valueOf) && !isObject$r(val = call$o(fn, input))) return val;
+         if (pref !== 'string' && isCallable$m(fn = input.toString) && !isObject$r(val = call$o(fn, input))) return val;
+         throw TypeError$m("Can't convert object to primitive value");
+       };
+
+       var shared$5 = {exports: {}};
+
+       var isPure = false;
+
+       var global$1d = global$1m;
+
+       // eslint-disable-next-line es/no-object-defineproperty -- safe
+       var defineProperty$b = Object.defineProperty;
+
+       var setGlobal$3 = function (key, value) {
+         try {
+           defineProperty$b(global$1d, key, { value: value, configurable: true, writable: true });
+         } catch (error) {
+           global$1d[key] = value;
+         } return value;
+       };
+
+       var global$1c = global$1m;
+       var setGlobal$2 = setGlobal$3;
+
+       var SHARED = '__core-js_shared__';
+       var store$4 = global$1c[SHARED] || setGlobal$2(SHARED, {});
+
+       var sharedStore = store$4;
+
+       var store$3 = sharedStore;
+
+       (shared$5.exports = function (key, value) {
+         return store$3[key] || (store$3[key] = value !== undefined ? value : {});
+       })('versions', []).push({
+         version: '3.19.1',
+         mode: 'global',
+         copyright: '© 2021 Denis Pushkarev (zloirock.ru)'
+       });
+
+       var global$1b = global$1m;
+       var requireObjectCoercible$c = requireObjectCoercible$e;
+
+       var Object$3 = global$1b.Object;
+
+       // `ToObject` abstract operation
+       // https://tc39.es/ecma262/#sec-toobject
+       var toObject$j = function (argument) {
+         return Object$3(requireObjectCoercible$c(argument));
+       };
+
+       var uncurryThis$U = functionUncurryThis;
+       var toObject$i = toObject$j;
+
+       var hasOwnProperty$3 = uncurryThis$U({}.hasOwnProperty);
+
+       // `HasOwnProperty` abstract operation
+       // https://tc39.es/ecma262/#sec-hasownproperty
+       var hasOwnProperty_1 = Object.hasOwn || function hasOwn(it, key) {
+         return hasOwnProperty$3(toObject$i(it), key);
+       };
+
+       var uncurryThis$T = functionUncurryThis;
+
+       var id$2 = 0;
+       var postfix = Math.random();
+       var toString$m = uncurryThis$T(1.0.toString);
+
+       var uid$5 = function (key) {
+         return 'Symbol(' + (key === undefined ? '' : key) + ')_' + toString$m(++id$2 + postfix, 36);
+       };
+
+       var global$1a = global$1m;
+       var shared$4 = shared$5.exports;
+       var hasOwn$l = hasOwnProperty_1;
+       var uid$4 = uid$5;
+       var NATIVE_SYMBOL$2 = nativeSymbol;
+       var USE_SYMBOL_AS_UID = useSymbolAsUid;
+
+       var WellKnownSymbolsStore$1 = shared$4('wks');
+       var Symbol$3 = global$1a.Symbol;
+       var symbolFor = Symbol$3 && Symbol$3['for'];
+       var createWellKnownSymbol = USE_SYMBOL_AS_UID ? Symbol$3 : Symbol$3 && Symbol$3.withoutSetter || uid$4;
+
+       var wellKnownSymbol$t = function (name) {
+         if (!hasOwn$l(WellKnownSymbolsStore$1, name) || !(NATIVE_SYMBOL$2 || typeof WellKnownSymbolsStore$1[name] == 'string')) {
+           var description = 'Symbol.' + name;
+           if (NATIVE_SYMBOL$2 && hasOwn$l(Symbol$3, name)) {
+             WellKnownSymbolsStore$1[name] = Symbol$3[name];
+           } else if (USE_SYMBOL_AS_UID && symbolFor) {
+             WellKnownSymbolsStore$1[name] = symbolFor(description);
+           } else {
+             WellKnownSymbolsStore$1[name] = createWellKnownSymbol(description);
+           }
+         } return WellKnownSymbolsStore$1[name];
+       };
+
+       var global$19 = global$1m;
+       var call$n = functionCall;
+       var isObject$q = isObject$s;
+       var isSymbol$5 = isSymbol$6;
+       var getMethod$6 = getMethod$7;
+       var ordinaryToPrimitive = ordinaryToPrimitive$1;
+       var wellKnownSymbol$s = wellKnownSymbol$t;
+
+       var TypeError$l = global$19.TypeError;
+       var TO_PRIMITIVE$1 = wellKnownSymbol$s('toPrimitive');
+
+       // `ToPrimitive` abstract operation
+       // https://tc39.es/ecma262/#sec-toprimitive
+       var toPrimitive$3 = function (input, pref) {
+         if (!isObject$q(input) || isSymbol$5(input)) return input;
+         var exoticToPrim = getMethod$6(input, TO_PRIMITIVE$1);
+         var result;
+         if (exoticToPrim) {
+           if (pref === undefined) pref = 'default';
+           result = call$n(exoticToPrim, input, pref);
+           if (!isObject$q(result) || isSymbol$5(result)) return result;
+           throw TypeError$l("Can't convert object to primitive value");
+         }
+         if (pref === undefined) pref = 'number';
+         return ordinaryToPrimitive(input, pref);
        };
 
-       var hasOwnProperty = {}.hasOwnProperty;
+       var toPrimitive$2 = toPrimitive$3;
+       var isSymbol$4 = isSymbol$6;
 
-       var has = function (it, key) {
-         return hasOwnProperty.call(it, key);
+       // `ToPropertyKey` abstract operation
+       // https://tc39.es/ecma262/#sec-topropertykey
+       var toPropertyKey$5 = function (argument) {
+         var key = toPrimitive$2(argument, 'string');
+         return isSymbol$4(key) ? key : key + '';
        };
 
-       var document$1 = global_1.document;
+       var global$18 = global$1m;
+       var isObject$p = isObject$s;
+
+       var document$3 = global$18.document;
        // typeof document.createElement is 'object' in old IE
-       var EXISTS = isObject(document$1) && isObject(document$1.createElement);
+       var EXISTS$1 = isObject$p(document$3) && isObject$p(document$3.createElement);
 
-       var documentCreateElement = function (it) {
-         return EXISTS ? document$1.createElement(it) : {};
+       var documentCreateElement$2 = function (it) {
+         return EXISTS$1 ? document$3.createElement(it) : {};
        };
 
+       var DESCRIPTORS$n = descriptors;
+       var fails$O = fails$S;
+       var createElement$1 = documentCreateElement$2;
+
        // Thank's IE8 for his funny defineProperty
-       var ie8DomDefine = !descriptors && !fails(function () {
-         return Object.defineProperty(documentCreateElement('div'), 'a', {
+       var ie8DomDefine = !DESCRIPTORS$n && !fails$O(function () {
+         // eslint-disable-next-line es/no-object-defineproperty -- requied for testing
+         return Object.defineProperty(createElement$1('div'), 'a', {
            get: function () { return 7; }
          }).a != 7;
        });
 
-       var nativeGetOwnPropertyDescriptor = Object.getOwnPropertyDescriptor;
+       var DESCRIPTORS$m = descriptors;
+       var call$m = functionCall;
+       var propertyIsEnumerableModule$2 = objectPropertyIsEnumerable;
+       var createPropertyDescriptor$6 = createPropertyDescriptor$7;
+       var toIndexedObject$b = toIndexedObject$c;
+       var toPropertyKey$4 = toPropertyKey$5;
+       var hasOwn$k = hasOwnProperty_1;
+       var IE8_DOM_DEFINE$1 = ie8DomDefine;
+
+       // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+       var $getOwnPropertyDescriptor$1 = Object.getOwnPropertyDescriptor;
 
        // `Object.getOwnPropertyDescriptor` method
-       // https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor
-       var f$1 = descriptors ? nativeGetOwnPropertyDescriptor : function getOwnPropertyDescriptor(O, P) {
-         O = toIndexedObject(O);
-         P = toPrimitive(P, true);
-         if (ie8DomDefine) try {
-           return nativeGetOwnPropertyDescriptor(O, P);
+       // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+       objectGetOwnPropertyDescriptor.f = DESCRIPTORS$m ? $getOwnPropertyDescriptor$1 : function getOwnPropertyDescriptor(O, P) {
+         O = toIndexedObject$b(O);
+         P = toPropertyKey$4(P);
+         if (IE8_DOM_DEFINE$1) try {
+           return $getOwnPropertyDescriptor$1(O, P);
          } catch (error) { /* empty */ }
-         if (has(O, P)) return createPropertyDescriptor(!objectPropertyIsEnumerable.f.call(O, P), O[P]);
+         if (hasOwn$k(O, P)) return createPropertyDescriptor$6(!call$m(propertyIsEnumerableModule$2.f, O, P), O[P]);
        };
 
-       var objectGetOwnPropertyDescriptor = {
-               f: f$1
-       };
+       var objectDefineProperty = {};
 
-       var anObject = function (it) {
-         if (!isObject(it)) {
-           throw TypeError(String(it) + ' is not an object');
-         } return it;
+       var global$17 = global$1m;
+       var isObject$o = isObject$s;
+
+       var String$5 = global$17.String;
+       var TypeError$k = global$17.TypeError;
+
+       // `Assert: Type(argument) is Object`
+       var anObject$n = function (argument) {
+         if (isObject$o(argument)) return argument;
+         throw TypeError$k(String$5(argument) + ' is not an object');
        };
 
-       var nativeDefineProperty = Object.defineProperty;
+       var global$16 = global$1m;
+       var DESCRIPTORS$l = descriptors;
+       var IE8_DOM_DEFINE = ie8DomDefine;
+       var anObject$m = anObject$n;
+       var toPropertyKey$3 = toPropertyKey$5;
+
+       var TypeError$j = global$16.TypeError;
+       // eslint-disable-next-line es/no-object-defineproperty -- safe
+       var $defineProperty$1 = Object.defineProperty;
 
        // `Object.defineProperty` method
-       // https://tc39.github.io/ecma262/#sec-object.defineproperty
-       var f$2 = descriptors ? nativeDefineProperty : function defineProperty(O, P, Attributes) {
-         anObject(O);
-         P = toPrimitive(P, true);
-         anObject(Attributes);
-         if (ie8DomDefine) try {
-           return nativeDefineProperty(O, P, Attributes);
+       // https://tc39.es/ecma262/#sec-object.defineproperty
+       objectDefineProperty.f = DESCRIPTORS$l ? $defineProperty$1 : function defineProperty(O, P, Attributes) {
+         anObject$m(O);
+         P = toPropertyKey$3(P);
+         anObject$m(Attributes);
+         if (IE8_DOM_DEFINE) try {
+           return $defineProperty$1(O, P, Attributes);
          } catch (error) { /* empty */ }
-         if ('get' in Attributes || 'set' in Attributes) throw TypeError('Accessors not supported');
+         if ('get' in Attributes || 'set' in Attributes) throw TypeError$j('Accessors not supported');
          if ('value' in Attributes) O[P] = Attributes.value;
          return O;
        };
 
-       var objectDefineProperty = {
-               f: f$2
-       };
+       var DESCRIPTORS$k = descriptors;
+       var definePropertyModule$7 = objectDefineProperty;
+       var createPropertyDescriptor$5 = createPropertyDescriptor$7;
 
-       var createNonEnumerableProperty = descriptors ? function (object, key, value) {
-         return objectDefineProperty.f(object, key, createPropertyDescriptor(1, value));
+       var createNonEnumerableProperty$b = DESCRIPTORS$k ? function (object, key, value) {
+         return definePropertyModule$7.f(object, key, createPropertyDescriptor$5(1, value));
        } : function (object, key, value) {
          object[key] = value;
          return object;
        };
 
-       var setGlobal = function (key, value) {
-         try {
-           createNonEnumerableProperty(global_1, key, value);
-         } catch (error) {
-           global_1[key] = value;
-         } return value;
-       };
-
-       var SHARED = '__core-js_shared__';
-       var store = global_1[SHARED] || setGlobal(SHARED, {});
+       var redefine$h = {exports: {}};
 
-       var sharedStore = store;
+       var uncurryThis$S = functionUncurryThis;
+       var isCallable$l = isCallable$r;
+       var store$2 = sharedStore;
 
-       var functionToString = Function.toString;
+       var functionToString$1 = uncurryThis$S(Function.toString);
 
-       // this helper broken in `3.4.1-3.4.4`, so we can't use `shared` helper
-       if (typeof sharedStore.inspectSource != 'function') {
-         sharedStore.inspectSource = function (it) {
-           return functionToString.call(it);
+       // this helper broken in `core-js@3.4.1-3.4.4`, so we can't use `shared` helper
+       if (!isCallable$l(store$2.inspectSource)) {
+         store$2.inspectSource = function (it) {
+           return functionToString$1(it);
          };
        }
 
-       var inspectSource = sharedStore.inspectSource;
+       var inspectSource$4 = store$2.inspectSource;
 
-       var WeakMap = global_1.WeakMap;
+       var global$15 = global$1m;
+       var isCallable$k = isCallable$r;
+       var inspectSource$3 = inspectSource$4;
 
-       var nativeWeakMap = typeof WeakMap === 'function' && /native code/.test(inspectSource(WeakMap));
+       var WeakMap$1 = global$15.WeakMap;
 
-       var isPure = false;
+       var nativeWeakMap = isCallable$k(WeakMap$1) && /native code/.test(inspectSource$3(WeakMap$1));
 
-       var shared = createCommonjsModule(function (module) {
-       (module.exports = function (key, value) {
-         return sharedStore[key] || (sharedStore[key] = value !== undefined ? value : {});
-       })('versions', []).push({
-         version: '3.6.5',
-         mode:  'global',
-         copyright: '© 2020 Denis Pushkarev (zloirock.ru)'
-       });
-       });
+       var shared$3 = shared$5.exports;
+       var uid$3 = uid$5;
 
-       var id = 0;
-       var postfix = Math.random();
+       var keys$3 = shared$3('keys');
 
-       var uid = function (key) {
-         return 'Symbol(' + String(key === undefined ? '' : key) + ')_' + (++id + postfix).toString(36);
+       var sharedKey$4 = function (key) {
+         return keys$3[key] || (keys$3[key] = uid$3(key));
        };
 
-       var keys = shared('keys');
-
-       var sharedKey = function (key) {
-         return keys[key] || (keys[key] = uid(key));
-       };
+       var hiddenKeys$6 = {};
 
-       var hiddenKeys = {};
+       var NATIVE_WEAK_MAP = nativeWeakMap;
+       var global$14 = global$1m;
+       var uncurryThis$R = functionUncurryThis;
+       var isObject$n = isObject$s;
+       var createNonEnumerableProperty$a = createNonEnumerableProperty$b;
+       var hasOwn$j = hasOwnProperty_1;
+       var shared$2 = sharedStore;
+       var sharedKey$3 = sharedKey$4;
+       var hiddenKeys$5 = hiddenKeys$6;
 
-       var WeakMap$1 = global_1.WeakMap;
-       var set, get, has$1;
+       var OBJECT_ALREADY_INITIALIZED = 'Object already initialized';
+       var TypeError$i = global$14.TypeError;
+       var WeakMap = global$14.WeakMap;
+       var set$4, get$5, has;
 
        var enforce = function (it) {
-         return has$1(it) ? get(it) : set(it, {});
+         return has(it) ? get$5(it) : set$4(it, {});
        };
 
        var getterFor = function (TYPE) {
          return function (it) {
            var state;
-           if (!isObject(it) || (state = get(it)).type !== TYPE) {
-             throw TypeError('Incompatible receiver, ' + TYPE + ' required');
+           if (!isObject$n(it) || (state = get$5(it)).type !== TYPE) {
+             throw TypeError$i('Incompatible receiver, ' + TYPE + ' required');
            } return state;
          };
        };
 
-       if (nativeWeakMap) {
-         var store$1 = new WeakMap$1();
-         var wmget = store$1.get;
-         var wmhas = store$1.has;
-         var wmset = store$1.set;
-         set = function (it, metadata) {
-           wmset.call(store$1, it, metadata);
+       if (NATIVE_WEAK_MAP || shared$2.state) {
+         var store$1 = shared$2.state || (shared$2.state = new WeakMap());
+         var wmget = uncurryThis$R(store$1.get);
+         var wmhas = uncurryThis$R(store$1.has);
+         var wmset = uncurryThis$R(store$1.set);
+         set$4 = function (it, metadata) {
+           if (wmhas(store$1, it)) throw new TypeError$i(OBJECT_ALREADY_INITIALIZED);
+           metadata.facade = it;
+           wmset(store$1, it, metadata);
            return metadata;
          };
-         get = function (it) {
-           return wmget.call(store$1, it) || {};
+         get$5 = function (it) {
+           return wmget(store$1, it) || {};
          };
-         has$1 = function (it) {
-           return wmhas.call(store$1, it);
+         has = function (it) {
+           return wmhas(store$1, it);
          };
        } else {
-         var STATE = sharedKey('state');
-         hiddenKeys[STATE] = true;
-         set = function (it, metadata) {
-           createNonEnumerableProperty(it, STATE, metadata);
+         var STATE = sharedKey$3('state');
+         hiddenKeys$5[STATE] = true;
+         set$4 = function (it, metadata) {
+           if (hasOwn$j(it, STATE)) throw new TypeError$i(OBJECT_ALREADY_INITIALIZED);
+           metadata.facade = it;
+           createNonEnumerableProperty$a(it, STATE, metadata);
            return metadata;
          };
-         get = function (it) {
-           return has(it, STATE) ? it[STATE] : {};
+         get$5 = function (it) {
+           return hasOwn$j(it, STATE) ? it[STATE] : {};
          };
-         has$1 = function (it) {
-           return has(it, STATE);
+         has = function (it) {
+           return hasOwn$j(it, STATE);
          };
        }
 
        var internalState = {
-         set: set,
-         get: get,
-         has: has$1,
+         set: set$4,
+         get: get$5,
+         has: has,
          enforce: enforce,
          getterFor: getterFor
        };
 
-       var redefine = createCommonjsModule(function (module) {
-       var getInternalState = internalState.get;
-       var enforceInternalState = internalState.enforce;
+       var DESCRIPTORS$j = descriptors;
+       var hasOwn$i = hasOwnProperty_1;
+
+       var FunctionPrototype$2 = Function.prototype;
+       // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+       var getDescriptor = DESCRIPTORS$j && Object.getOwnPropertyDescriptor;
+
+       var EXISTS = hasOwn$i(FunctionPrototype$2, 'name');
+       // additional protection from minified / mangled / dropped function names
+       var PROPER = EXISTS && (function something() { /* empty */ }).name === 'something';
+       var CONFIGURABLE = EXISTS && (!DESCRIPTORS$j || (DESCRIPTORS$j && getDescriptor(FunctionPrototype$2, 'name').configurable));
+
+       var functionName = {
+         EXISTS: EXISTS,
+         PROPER: PROPER,
+         CONFIGURABLE: CONFIGURABLE
+       };
+
+       var global$13 = global$1m;
+       var isCallable$j = isCallable$r;
+       var hasOwn$h = hasOwnProperty_1;
+       var createNonEnumerableProperty$9 = createNonEnumerableProperty$b;
+       var setGlobal$1 = setGlobal$3;
+       var inspectSource$2 = inspectSource$4;
+       var InternalStateModule$9 = internalState;
+       var CONFIGURABLE_FUNCTION_NAME$2 = functionName.CONFIGURABLE;
+
+       var getInternalState$7 = InternalStateModule$9.get;
+       var enforceInternalState$1 = InternalStateModule$9.enforce;
        var TEMPLATE = String(String).split('String');
 
-       (module.exports = function (O, key, value, options) {
+       (redefine$h.exports = function (O, key, value, options) {
          var unsafe = options ? !!options.unsafe : false;
          var simple = options ? !!options.enumerable : false;
          var noTargetGet = options ? !!options.noTargetGet : false;
-         if (typeof value == 'function') {
-           if (typeof key == 'string' && !has(value, 'name')) createNonEnumerableProperty(value, 'name', key);
-           enforceInternalState(value).source = TEMPLATE.join(typeof key == 'string' ? key : '');
+         var name = options && options.name !== undefined ? options.name : key;
+         var state;
+         if (isCallable$j(value)) {
+           if (String(name).slice(0, 7) === 'Symbol(') {
+             name = '[' + String(name).replace(/^Symbol\(([^)]*)\)/, '$1') + ']';
+           }
+           if (!hasOwn$h(value, 'name') || (CONFIGURABLE_FUNCTION_NAME$2 && value.name !== name)) {
+             createNonEnumerableProperty$9(value, 'name', name);
+           }
+           state = enforceInternalState$1(value);
+           if (!state.source) {
+             state.source = TEMPLATE.join(typeof name == 'string' ? name : '');
+           }
          }
-         if (O === global_1) {
+         if (O === global$13) {
            if (simple) O[key] = value;
-           else setGlobal(key, value);
+           else setGlobal$1(key, value);
            return;
          } else if (!unsafe) {
            delete O[key];
            simple = true;
          }
          if (simple) O[key] = value;
-         else createNonEnumerableProperty(O, key, value);
+         else createNonEnumerableProperty$9(O, key, value);
        // add fake Function#toString for correct work wrapped methods / constructors with methods like LoDash isNative
        })(Function.prototype, 'toString', function toString() {
-         return typeof this == 'function' && getInternalState(this).source || inspectSource(this);
-       });
+         return isCallable$j(this) && getInternalState$7(this).source || inspectSource$2(this);
        });
 
-       var path = global_1;
+       var objectGetOwnPropertyNames = {};
 
-       var aFunction = function (variable) {
-         return typeof variable == 'function' ? variable : undefined;
+       var ceil$1 = Math.ceil;
+       var floor$8 = Math.floor;
+
+       // `ToIntegerOrInfinity` abstract operation
+       // https://tc39.es/ecma262/#sec-tointegerorinfinity
+       var toIntegerOrInfinity$b = function (argument) {
+         var number = +argument;
+         // eslint-disable-next-line no-self-compare -- safe
+         return number !== number || number === 0 ? 0 : (number > 0 ? floor$8 : ceil$1)(number);
        };
 
-       var getBuiltIn = function (namespace, method) {
-         return arguments.length < 2 ? aFunction(path[namespace]) || aFunction(global_1[namespace])
-           : path[namespace] && path[namespace][method] || global_1[namespace] && global_1[namespace][method];
-       };
+       var toIntegerOrInfinity$a = toIntegerOrInfinity$b;
 
-       var ceil = Math.ceil;
-       var floor = Math.floor;
+       var max$4 = Math.max;
+       var min$9 = Math.min;
 
-       // `ToInteger` abstract operation
-       // https://tc39.github.io/ecma262/#sec-tointeger
-       var toInteger = function (argument) {
-         return isNaN(argument = +argument) ? 0 : (argument > 0 ? floor : ceil)(argument);
+       // Helper for a popular repeating case of the spec:
+       // Let integer be ? ToInteger(index).
+       // If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).
+       var toAbsoluteIndex$8 = function (index, length) {
+         var integer = toIntegerOrInfinity$a(index);
+         return integer < 0 ? max$4(integer + length, 0) : min$9(integer, length);
        };
 
-       var min = Math.min;
+       var toIntegerOrInfinity$9 = toIntegerOrInfinity$b;
+
+       var min$8 = Math.min;
 
        // `ToLength` abstract operation
-       // https://tc39.github.io/ecma262/#sec-tolength
-       var toLength = function (argument) {
-         return argument > 0 ? min(toInteger(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
+       // https://tc39.es/ecma262/#sec-tolength
+       var toLength$c = function (argument) {
+         return argument > 0 ? min$8(toIntegerOrInfinity$9(argument), 0x1FFFFFFFFFFFFF) : 0; // 2 ** 53 - 1 == 9007199254740991
        };
 
-       var max = Math.max;
-       var min$1 = Math.min;
+       var toLength$b = toLength$c;
 
-       // Helper for a popular repeating case of the spec:
-       // Let integer be ? ToInteger(index).
-       // If integer < 0, let result be max((length + integer), 0); else let result be min(integer, length).
-       var toAbsoluteIndex = function (index, length) {
-         var integer = toInteger(index);
-         return integer < 0 ? max(integer + length, 0) : min$1(integer, length);
+       // `LengthOfArrayLike` abstract operation
+       // https://tc39.es/ecma262/#sec-lengthofarraylike
+       var lengthOfArrayLike$g = function (obj) {
+         return toLength$b(obj.length);
        };
 
+       var toIndexedObject$a = toIndexedObject$c;
+       var toAbsoluteIndex$7 = toAbsoluteIndex$8;
+       var lengthOfArrayLike$f = lengthOfArrayLike$g;
+
        // `Array.prototype.{ indexOf, includes }` methods implementation
-       var createMethod = function (IS_INCLUDES) {
+       var createMethod$6 = function (IS_INCLUDES) {
          return function ($this, el, fromIndex) {
-           var O = toIndexedObject($this);
-           var length = toLength(O.length);
-           var index = toAbsoluteIndex(fromIndex, length);
+           var O = toIndexedObject$a($this);
+           var length = lengthOfArrayLike$f(O);
+           var index = toAbsoluteIndex$7(fromIndex, length);
            var value;
            // Array#includes uses SameValueZero equality algorithm
-           // eslint-disable-next-line no-self-compare
+           // eslint-disable-next-line no-self-compare -- NaN check
            if (IS_INCLUDES && el != el) while (length > index) {
              value = O[index++];
-             // eslint-disable-next-line no-self-compare
+             // eslint-disable-next-line no-self-compare -- NaN check
              if (value != value) return true;
            // Array#indexOf ignores holes, Array#includes - not
            } else for (;length > index; index++) {
 
        var arrayIncludes = {
          // `Array.prototype.includes` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.includes
-         includes: createMethod(true),
+         // https://tc39.es/ecma262/#sec-array.prototype.includes
+         includes: createMethod$6(true),
          // `Array.prototype.indexOf` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.indexof
-         indexOf: createMethod(false)
+         // https://tc39.es/ecma262/#sec-array.prototype.indexof
+         indexOf: createMethod$6(false)
        };
 
-       var indexOf = arrayIncludes.indexOf;
+       var uncurryThis$Q = functionUncurryThis;
+       var hasOwn$g = hasOwnProperty_1;
+       var toIndexedObject$9 = toIndexedObject$c;
+       var indexOf$1 = arrayIncludes.indexOf;
+       var hiddenKeys$4 = hiddenKeys$6;
 
+       var push$a = uncurryThis$Q([].push);
 
        var objectKeysInternal = function (object, names) {
-         var O = toIndexedObject(object);
+         var O = toIndexedObject$9(object);
          var i = 0;
          var result = [];
          var key;
-         for (key in O) !has(hiddenKeys, key) && has(O, key) && result.push(key);
+         for (key in O) !hasOwn$g(hiddenKeys$4, key) && hasOwn$g(O, key) && push$a(result, key);
          // Don't enum bug & hidden keys
-         while (names.length > i) if (has(O, key = names[i++])) {
-           ~indexOf(result, key) || result.push(key);
+         while (names.length > i) if (hasOwn$g(O, key = names[i++])) {
+           ~indexOf$1(result, key) || push$a(result, key);
          }
          return result;
        };
 
        // IE8- don't enum bug keys
-       var enumBugKeys = [
+       var enumBugKeys$3 = [
          'constructor',
          'hasOwnProperty',
          'isPrototypeOf',
          'valueOf'
        ];
 
-       var hiddenKeys$1 = enumBugKeys.concat('length', 'prototype');
+       var internalObjectKeys$1 = objectKeysInternal;
+       var enumBugKeys$2 = enumBugKeys$3;
+
+       var hiddenKeys$3 = enumBugKeys$2.concat('length', 'prototype');
 
        // `Object.getOwnPropertyNames` method
-       // https://tc39.github.io/ecma262/#sec-object.getownpropertynames
-       var f$3 = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
-         return objectKeysInternal(O, hiddenKeys$1);
+       // https://tc39.es/ecma262/#sec-object.getownpropertynames
+       // eslint-disable-next-line es/no-object-getownpropertynames -- safe
+       objectGetOwnPropertyNames.f = Object.getOwnPropertyNames || function getOwnPropertyNames(O) {
+         return internalObjectKeys$1(O, hiddenKeys$3);
        };
 
-       var objectGetOwnPropertyNames = {
-               f: f$3
-       };
+       var objectGetOwnPropertySymbols = {};
 
-       var f$4 = Object.getOwnPropertySymbols;
+       // eslint-disable-next-line es/no-object-getownpropertysymbols -- safe
+       objectGetOwnPropertySymbols.f = Object.getOwnPropertySymbols;
 
-       var objectGetOwnPropertySymbols = {
-               f: f$4
-       };
+       var getBuiltIn$8 = getBuiltIn$b;
+       var uncurryThis$P = functionUncurryThis;
+       var getOwnPropertyNamesModule$2 = objectGetOwnPropertyNames;
+       var getOwnPropertySymbolsModule$2 = objectGetOwnPropertySymbols;
+       var anObject$l = anObject$n;
+
+       var concat$3 = uncurryThis$P([].concat);
 
        // all object keys, includes non-enumerable and symbols
-       var ownKeys = getBuiltIn('Reflect', 'ownKeys') || function ownKeys(it) {
-         var keys = objectGetOwnPropertyNames.f(anObject(it));
-         var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
-         return getOwnPropertySymbols ? keys.concat(getOwnPropertySymbols(it)) : keys;
+       var ownKeys$1 = getBuiltIn$8('Reflect', 'ownKeys') || function ownKeys(it) {
+         var keys = getOwnPropertyNamesModule$2.f(anObject$l(it));
+         var getOwnPropertySymbols = getOwnPropertySymbolsModule$2.f;
+         return getOwnPropertySymbols ? concat$3(keys, getOwnPropertySymbols(it)) : keys;
        };
 
-       var copyConstructorProperties = function (target, source) {
+       var hasOwn$f = hasOwnProperty_1;
+       var ownKeys = ownKeys$1;
+       var getOwnPropertyDescriptorModule$3 = objectGetOwnPropertyDescriptor;
+       var definePropertyModule$6 = objectDefineProperty;
+
+       var copyConstructorProperties$2 = function (target, source) {
          var keys = ownKeys(source);
-         var defineProperty = objectDefineProperty.f;
-         var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+         var defineProperty = definePropertyModule$6.f;
+         var getOwnPropertyDescriptor = getOwnPropertyDescriptorModule$3.f;
          for (var i = 0; i < keys.length; i++) {
            var key = keys[i];
-           if (!has(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));
+           if (!hasOwn$f(target, key)) defineProperty(target, key, getOwnPropertyDescriptor(source, key));
          }
        };
 
+       var fails$N = fails$S;
+       var isCallable$i = isCallable$r;
+
        var replacement = /#|\.prototype\./;
 
-       var isForced = function (feature, detection) {
-         var value = data[normalize(feature)];
+       var isForced$5 = function (feature, detection) {
+         var value = data[normalize$1(feature)];
          return value == POLYFILL ? true
            : value == NATIVE ? false
-           : typeof detection == 'function' ? fails(detection)
+           : isCallable$i(detection) ? fails$N(detection)
            : !!detection;
        };
 
-       var normalize = isForced.normalize = function (string) {
+       var normalize$1 = isForced$5.normalize = function (string) {
          return String(string).replace(replacement, '.').toLowerCase();
        };
 
-       var data = isForced.data = {};
-       var NATIVE = isForced.NATIVE = 'N';
-       var POLYFILL = isForced.POLYFILL = 'P';
-
-       var isForced_1 = isForced;
-
-       var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
-
-
-
+       var data = isForced$5.data = {};
+       var NATIVE = isForced$5.NATIVE = 'N';
+       var POLYFILL = isForced$5.POLYFILL = 'P';
 
+       var isForced_1 = isForced$5;
 
+       var global$12 = global$1m;
+       var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
+       var createNonEnumerableProperty$8 = createNonEnumerableProperty$b;
+       var redefine$g = redefine$h.exports;
+       var setGlobal = setGlobal$3;
+       var copyConstructorProperties$1 = copyConstructorProperties$2;
+       var isForced$4 = isForced_1;
 
        /*
          options.target      - name of the target object
          options.sham        - add a flag to not completely full polyfills
          options.enumerable  - export as enumerable property
          options.noTargetGet - prevent calling a getter on target
+         options.name        - the .name of the function if it does not match the key
        */
        var _export = function (options, source) {
          var TARGET = options.target;
          var STATIC = options.stat;
          var FORCED, target, key, targetProperty, sourceProperty, descriptor;
          if (GLOBAL) {
-           target = global_1;
+           target = global$12;
          } else if (STATIC) {
-           target = global_1[TARGET] || setGlobal(TARGET, {});
+           target = global$12[TARGET] || setGlobal(TARGET, {});
          } else {
-           target = (global_1[TARGET] || {}).prototype;
+           target = (global$12[TARGET] || {}).prototype;
          }
          if (target) for (key in source) {
            sourceProperty = source[key];
            if (options.noTargetGet) {
-             descriptor = getOwnPropertyDescriptor$1(target, key);
+             descriptor = getOwnPropertyDescriptor$4(target, key);
              targetProperty = descriptor && descriptor.value;
            } else targetProperty = target[key];
-           FORCED = isForced_1(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
+           FORCED = isForced$4(GLOBAL ? key : TARGET + (STATIC ? '.' : '#') + key, options.forced);
            // contained in target
            if (!FORCED && targetProperty !== undefined) {
-             if (typeof sourceProperty === typeof targetProperty) continue;
-             copyConstructorProperties(sourceProperty, targetProperty);
+             if (typeof sourceProperty == typeof targetProperty) continue;
+             copyConstructorProperties$1(sourceProperty, targetProperty);
            }
            // add a flag to not completely full polyfills
            if (options.sham || (targetProperty && targetProperty.sham)) {
-             createNonEnumerableProperty(sourceProperty, 'sham', true);
+             createNonEnumerableProperty$8(sourceProperty, 'sham', true);
            }
            // extend global
-           redefine(target, key, sourceProperty, options);
+           redefine$g(target, key, sourceProperty, options);
          }
        };
 
+       var $$1e = _export;
+       var global$11 = global$1m;
+       var uncurryThis$O = functionUncurryThis;
+
+       var Date$1 = global$11.Date;
+       var getTime$2 = uncurryThis$O(Date$1.prototype.getTime);
+
        // `Date.now` method
-       // https://tc39.github.io/ecma262/#sec-date.now
-       _export({ target: 'Date', stat: true }, {
+       // https://tc39.es/ecma262/#sec-date.now
+       $$1e({ target: 'Date', stat: true }, {
          now: function now() {
-           return new Date().getTime();
+           return getTime$2(new Date$1());
          }
        });
 
-       var DatePrototype = Date.prototype;
+       var uncurryThis$N = functionUncurryThis;
+       var redefine$f = redefine$h.exports;
+
+       var DatePrototype$1 = Date.prototype;
        var INVALID_DATE = 'Invalid Date';
-       var TO_STRING = 'toString';
-       var nativeDateToString = DatePrototype[TO_STRING];
-       var getTime = DatePrototype.getTime;
+       var TO_STRING$1 = 'toString';
+       var un$DateToString = uncurryThis$N(DatePrototype$1[TO_STRING$1]);
+       var getTime$1 = uncurryThis$N(DatePrototype$1.getTime);
 
        // `Date.prototype.toString` method
-       // https://tc39.github.io/ecma262/#sec-date.prototype.tostring
-       if (new Date(NaN) + '' != INVALID_DATE) {
-         redefine(DatePrototype, TO_STRING, function toString() {
-           var value = getTime.call(this);
-           // eslint-disable-next-line no-self-compare
-           return value === value ? nativeDateToString.call(this) : INVALID_DATE;
+       // https://tc39.es/ecma262/#sec-date.prototype.tostring
+       if (String(new Date(NaN)) != INVALID_DATE) {
+         redefine$f(DatePrototype$1, TO_STRING$1, function toString() {
+           var value = getTime$1(this);
+           // eslint-disable-next-line no-self-compare -- NaN check
+           return value === value ? un$DateToString(this) : INVALID_DATE;
          });
        }
 
-       var nativeSymbol = !!Object.getOwnPropertySymbols && !fails(function () {
-         // Chrome 38 Symbol has incorrect toString conversion
-         // eslint-disable-next-line no-undef
-         return !String(Symbol());
+       function _typeof(obj) {
+         "@babel/helpers - typeof";
+
+         if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
+           _typeof = function (obj) {
+             return typeof obj;
+           };
+         } else {
+           _typeof = function (obj) {
+             return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
+           };
+         }
+
+         return _typeof(obj);
+       }
+
+       function _classCallCheck$1(instance, Constructor) {
+         if (!(instance instanceof Constructor)) {
+           throw new TypeError("Cannot call a class as a function");
+         }
+       }
+
+       function _defineProperties$1(target, props) {
+         for (var i = 0; i < props.length; i++) {
+           var descriptor = props[i];
+           descriptor.enumerable = descriptor.enumerable || false;
+           descriptor.configurable = true;
+           if ("value" in descriptor) descriptor.writable = true;
+           Object.defineProperty(target, descriptor.key, descriptor);
+         }
+       }
+
+       function _createClass$1(Constructor, protoProps, staticProps) {
+         if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
+         if (staticProps) _defineProperties$1(Constructor, staticProps);
+         return Constructor;
+       }
+
+       function _defineProperty(obj, key, value) {
+         if (key in obj) {
+           Object.defineProperty(obj, key, {
+             value: value,
+             enumerable: true,
+             configurable: true,
+             writable: true
+           });
+         } else {
+           obj[key] = value;
+         }
+
+         return obj;
+       }
+
+       function _slicedToArray(arr, i) {
+         return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
+       }
+
+       function _toConsumableArray(arr) {
+         return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
+       }
+
+       function _arrayWithoutHoles(arr) {
+         if (Array.isArray(arr)) return _arrayLikeToArray(arr);
+       }
+
+       function _arrayWithHoles(arr) {
+         if (Array.isArray(arr)) return arr;
+       }
+
+       function _iterableToArray(iter) {
+         if (typeof Symbol !== "undefined" && iter[Symbol.iterator] != null || iter["@@iterator"] != null) return Array.from(iter);
+       }
+
+       function _iterableToArrayLimit(arr, i) {
+         var _i = arr == null ? null : typeof Symbol !== "undefined" && arr[Symbol.iterator] || arr["@@iterator"];
+
+         if (_i == null) return;
+         var _arr = [];
+         var _n = true;
+         var _d = false;
+
+         var _s, _e;
+
+         try {
+           for (_i = _i.call(arr); !(_n = (_s = _i.next()).done); _n = true) {
+             _arr.push(_s.value);
+
+             if (i && _arr.length === i) break;
+           }
+         } catch (err) {
+           _d = true;
+           _e = err;
+         } finally {
+           try {
+             if (!_n && _i["return"] != null) _i["return"]();
+           } finally {
+             if (_d) throw _e;
+           }
+         }
+
+         return _arr;
+       }
+
+       function _unsupportedIterableToArray(o, minLen) {
+         if (!o) return;
+         if (typeof o === "string") return _arrayLikeToArray(o, minLen);
+         var n = Object.prototype.toString.call(o).slice(8, -1);
+         if (n === "Object" && o.constructor) n = o.constructor.name;
+         if (n === "Map" || n === "Set") return Array.from(o);
+         if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
+       }
+
+       function _arrayLikeToArray(arr, len) {
+         if (len == null || len > arr.length) len = arr.length;
+
+         for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
+
+         return arr2;
+       }
+
+       function _nonIterableSpread() {
+         throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+       }
+
+       function _nonIterableRest() {
+         throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+       }
+
+       function _createForOfIteratorHelper(o, allowArrayLike) {
+         var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"];
+
+         if (!it) {
+           if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
+             if (it) o = it;
+             var i = 0;
+
+             var F = function () {};
+
+             return {
+               s: F,
+               n: function () {
+                 if (i >= o.length) return {
+                   done: true
+                 };
+                 return {
+                   done: false,
+                   value: o[i++]
+                 };
+               },
+               e: function (e) {
+                 throw e;
+               },
+               f: F
+             };
+           }
+
+           throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
+         }
+
+         var normalCompletion = true,
+             didErr = false,
+             err;
+         return {
+           s: function () {
+             it = it.call(o);
+           },
+           n: function () {
+             var step = it.next();
+             normalCompletion = step.done;
+             return step;
+           },
+           e: function (e) {
+             didErr = true;
+             err = e;
+           },
+           f: function () {
+             try {
+               if (!normalCompletion && it.return != null) it.return();
+             } finally {
+               if (didErr) throw err;
+             }
+           }
+         };
+       }
+
+       var $$1d = _export;
+       var global$10 = global$1m;
+
+       // `globalThis` object
+       // https://tc39.es/ecma262/#sec-globalthis
+       $$1d({ global: true }, {
+         globalThis: global$10
        });
 
-       var useSymbolAsUid = nativeSymbol
-         // eslint-disable-next-line no-undef
-         && !Symbol.sham
-         // eslint-disable-next-line no-undef
-         && typeof Symbol.iterator == 'symbol';
+       var global$$ = global$1m;
 
-       // `IsArray` abstract operation
-       // https://tc39.github.io/ecma262/#sec-isarray
-       var isArray = Array.isArray || function isArray(arg) {
-         return classofRaw(arg) == 'Array';
-       };
+       var path$1 = global$$;
 
-       // `ToObject` abstract operation
-       // https://tc39.github.io/ecma262/#sec-toobject
-       var toObject = function (argument) {
-         return Object(requireObjectCoercible(argument));
+       var wellKnownSymbolWrapped = {};
+
+       var wellKnownSymbol$r = wellKnownSymbol$t;
+
+       wellKnownSymbolWrapped.f = wellKnownSymbol$r;
+
+       var path = path$1;
+       var hasOwn$e = hasOwnProperty_1;
+       var wrappedWellKnownSymbolModule$1 = wellKnownSymbolWrapped;
+       var defineProperty$a = objectDefineProperty.f;
+
+       var defineWellKnownSymbol$4 = function (NAME) {
+         var Symbol = path.Symbol || (path.Symbol = {});
+         if (!hasOwn$e(Symbol, NAME)) defineProperty$a(Symbol, NAME, {
+           value: wrappedWellKnownSymbolModule$1.f(NAME)
+         });
        };
 
+       var defineWellKnownSymbol$3 = defineWellKnownSymbol$4;
+
+       // `Symbol.iterator` well-known symbol
+       // https://tc39.es/ecma262/#sec-symbol.iterator
+       defineWellKnownSymbol$3('iterator');
+
+       var internalObjectKeys = objectKeysInternal;
+       var enumBugKeys$1 = enumBugKeys$3;
+
        // `Object.keys` method
-       // https://tc39.github.io/ecma262/#sec-object.keys
-       var objectKeys = Object.keys || function keys(O) {
-         return objectKeysInternal(O, enumBugKeys);
+       // https://tc39.es/ecma262/#sec-object.keys
+       // eslint-disable-next-line es/no-object-keys -- safe
+       var objectKeys$4 = Object.keys || function keys(O) {
+         return internalObjectKeys(O, enumBugKeys$1);
        };
 
+       var DESCRIPTORS$i = descriptors;
+       var definePropertyModule$5 = objectDefineProperty;
+       var anObject$k = anObject$n;
+       var toIndexedObject$8 = toIndexedObject$c;
+       var objectKeys$3 = objectKeys$4;
+
        // `Object.defineProperties` method
-       // https://tc39.github.io/ecma262/#sec-object.defineproperties
-       var objectDefineProperties = descriptors ? Object.defineProperties : function defineProperties(O, Properties) {
-         anObject(O);
-         var keys = objectKeys(Properties);
+       // https://tc39.es/ecma262/#sec-object.defineproperties
+       // eslint-disable-next-line es/no-object-defineproperties -- safe
+       var objectDefineProperties = DESCRIPTORS$i ? Object.defineProperties : function defineProperties(O, Properties) {
+         anObject$k(O);
+         var props = toIndexedObject$8(Properties);
+         var keys = objectKeys$3(Properties);
          var length = keys.length;
          var index = 0;
          var key;
-         while (length > index) objectDefineProperty.f(O, key = keys[index++], Properties[key]);
+         while (length > index) definePropertyModule$5.f(O, key = keys[index++], props[key]);
          return O;
        };
 
-       var html = getBuiltIn('document', 'documentElement');
+       var getBuiltIn$7 = getBuiltIn$b;
+
+       var html$2 = getBuiltIn$7('document', 'documentElement');
+
+       /* global ActiveXObject -- old IE, WSH */
+
+       var anObject$j = anObject$n;
+       var defineProperties$2 = objectDefineProperties;
+       var enumBugKeys = enumBugKeys$3;
+       var hiddenKeys$2 = hiddenKeys$6;
+       var html$1 = html$2;
+       var documentCreateElement$1 = documentCreateElement$2;
+       var sharedKey$2 = sharedKey$4;
 
        var GT = '>';
        var LT = '<';
-       var PROTOTYPE = 'prototype';
+       var PROTOTYPE$2 = 'prototype';
        var SCRIPT = 'script';
-       var IE_PROTO = sharedKey('IE_PROTO');
+       var IE_PROTO$1 = sharedKey$2('IE_PROTO');
 
        var EmptyConstructor = function () { /* empty */ };
 
        // Create object with fake `null` prototype: use iframe Object with cleared prototype
        var NullProtoObjectViaIFrame = function () {
          // Thrash, waste and sodomy: IE GC bug
-         var iframe = documentCreateElement('iframe');
+         var iframe = documentCreateElement$1('iframe');
          var JS = 'java' + SCRIPT + ':';
          var iframeDocument;
          iframe.style.display = 'none';
-         html.appendChild(iframe);
+         html$1.appendChild(iframe);
          // https://github.com/zloirock/core-js/issues/475
          iframe.src = String(JS);
          iframeDocument = iframe.contentWindow.document;
        var activeXDocument;
        var NullProtoObject = function () {
          try {
-           /* global ActiveXObject */
-           activeXDocument = document.domain && new ActiveXObject('htmlfile');
+           activeXDocument = new ActiveXObject('htmlfile');
          } catch (error) { /* ignore */ }
-         NullProtoObject = activeXDocument ? NullProtoObjectViaActiveX(activeXDocument) : NullProtoObjectViaIFrame();
+         NullProtoObject = typeof document != 'undefined'
+           ? document.domain && activeXDocument
+             ? NullProtoObjectViaActiveX(activeXDocument) // old IE
+             : NullProtoObjectViaIFrame()
+           : NullProtoObjectViaActiveX(activeXDocument); // WSH
          var length = enumBugKeys.length;
-         while (length--) delete NullProtoObject[PROTOTYPE][enumBugKeys[length]];
+         while (length--) delete NullProtoObject[PROTOTYPE$2][enumBugKeys[length]];
          return NullProtoObject();
        };
 
-       hiddenKeys[IE_PROTO] = true;
+       hiddenKeys$2[IE_PROTO$1] = true;
 
        // `Object.create` method
-       // https://tc39.github.io/ecma262/#sec-object.create
+       // https://tc39.es/ecma262/#sec-object.create
        var objectCreate = Object.create || function create(O, Properties) {
          var result;
          if (O !== null) {
-           EmptyConstructor[PROTOTYPE] = anObject(O);
+           EmptyConstructor[PROTOTYPE$2] = anObject$j(O);
            result = new EmptyConstructor();
-           EmptyConstructor[PROTOTYPE] = null;
+           EmptyConstructor[PROTOTYPE$2] = null;
            // add "__proto__" for Object.getPrototypeOf polyfill
-           result[IE_PROTO] = O;
+           result[IE_PROTO$1] = O;
          } else result = NullProtoObject();
-         return Properties === undefined ? result : objectDefineProperties(result, Properties);
+         return Properties === undefined ? result : defineProperties$2(result, Properties);
        };
 
-       var nativeGetOwnPropertyNames = objectGetOwnPropertyNames.f;
+       var wellKnownSymbol$q = wellKnownSymbol$t;
+       var create$a = objectCreate;
+       var definePropertyModule$4 = objectDefineProperty;
 
-       var toString$1 = {}.toString;
+       var UNSCOPABLES = wellKnownSymbol$q('unscopables');
+       var ArrayPrototype$1 = Array.prototype;
 
-       var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
-         ? Object.getOwnPropertyNames(window) : [];
+       // Array.prototype[@@unscopables]
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       if (ArrayPrototype$1[UNSCOPABLES] == undefined) {
+         definePropertyModule$4.f(ArrayPrototype$1, UNSCOPABLES, {
+           configurable: true,
+           value: create$a(null)
+         });
+       }
 
-       var getWindowNames = function (it) {
-         try {
-           return nativeGetOwnPropertyNames(it);
-         } catch (error) {
-           return windowNames.slice();
-         }
+       // add a key to Array.prototype[@@unscopables]
+       var addToUnscopables$6 = function (key) {
+         ArrayPrototype$1[UNSCOPABLES][key] = true;
        };
 
-       // fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
-       var f$5 = function getOwnPropertyNames(it) {
-         return windowNames && toString$1.call(it) == '[object Window]'
-           ? getWindowNames(it)
-           : nativeGetOwnPropertyNames(toIndexedObject(it));
-       };
+       var iterators = {};
 
-       var objectGetOwnPropertyNamesExternal = {
-               f: f$5
-       };
+       var fails$M = fails$S;
 
-       var WellKnownSymbolsStore = shared('wks');
-       var Symbol$1 = global_1.Symbol;
-       var createWellKnownSymbol = useSymbolAsUid ? Symbol$1 : Symbol$1 && Symbol$1.withoutSetter || uid;
+       var correctPrototypeGetter = !fails$M(function () {
+         function F() { /* empty */ }
+         F.prototype.constructor = null;
+         // eslint-disable-next-line es/no-object-getprototypeof -- required for testing
+         return Object.getPrototypeOf(new F()) !== F.prototype;
+       });
 
-       var wellKnownSymbol = function (name) {
-         if (!has(WellKnownSymbolsStore, name)) {
-           if (nativeSymbol && has(Symbol$1, name)) WellKnownSymbolsStore[name] = Symbol$1[name];
-           else WellKnownSymbolsStore[name] = createWellKnownSymbol('Symbol.' + name);
-         } return WellKnownSymbolsStore[name];
-       };
+       var global$_ = global$1m;
+       var hasOwn$d = hasOwnProperty_1;
+       var isCallable$h = isCallable$r;
+       var toObject$h = toObject$j;
+       var sharedKey$1 = sharedKey$4;
+       var CORRECT_PROTOTYPE_GETTER$1 = correctPrototypeGetter;
 
-       var f$6 = wellKnownSymbol;
+       var IE_PROTO = sharedKey$1('IE_PROTO');
+       var Object$2 = global$_.Object;
+       var ObjectPrototype$4 = Object$2.prototype;
 
-       var wellKnownSymbolWrapped = {
-               f: f$6
+       // `Object.getPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.getprototypeof
+       var objectGetPrototypeOf = CORRECT_PROTOTYPE_GETTER$1 ? Object$2.getPrototypeOf : function (O) {
+         var object = toObject$h(O);
+         if (hasOwn$d(object, IE_PROTO)) return object[IE_PROTO];
+         var constructor = object.constructor;
+         if (isCallable$h(constructor) && object instanceof constructor) {
+           return constructor.prototype;
+         } return object instanceof Object$2 ? ObjectPrototype$4 : null;
        };
 
-       var defineProperty = objectDefineProperty.f;
+       var fails$L = fails$S;
+       var isCallable$g = isCallable$r;
+       var getPrototypeOf$4 = objectGetPrototypeOf;
+       var redefine$e = redefine$h.exports;
+       var wellKnownSymbol$p = wellKnownSymbol$t;
 
-       var defineWellKnownSymbol = function (NAME) {
-         var Symbol = path.Symbol || (path.Symbol = {});
-         if (!has(Symbol, NAME)) defineProperty(Symbol, NAME, {
-           value: wellKnownSymbolWrapped.f(NAME)
-         });
-       };
+       var ITERATOR$a = wellKnownSymbol$p('iterator');
+       var BUGGY_SAFARI_ITERATORS$1 = false;
 
-       var defineProperty$1 = objectDefineProperty.f;
+       // `%IteratorPrototype%` object
+       // https://tc39.es/ecma262/#sec-%iteratorprototype%-object
+       var IteratorPrototype$2, PrototypeOfArrayIteratorPrototype, arrayIterator;
 
+       /* eslint-disable es/no-array-prototype-keys -- safe */
+       if ([].keys) {
+         arrayIterator = [].keys();
+         // Safari 8 has buggy iterators w/o `next`
+         if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS$1 = true;
+         else {
+           PrototypeOfArrayIteratorPrototype = getPrototypeOf$4(getPrototypeOf$4(arrayIterator));
+           if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype$2 = PrototypeOfArrayIteratorPrototype;
+         }
+       }
 
+       var NEW_ITERATOR_PROTOTYPE = IteratorPrototype$2 == undefined || fails$L(function () {
+         var test = {};
+         // FF44- legacy iterators case
+         return IteratorPrototype$2[ITERATOR$a].call(test) !== test;
+       });
 
-       var TO_STRING_TAG = wellKnownSymbol('toStringTag');
+       if (NEW_ITERATOR_PROTOTYPE) IteratorPrototype$2 = {};
 
-       var setToStringTag = function (it, TAG, STATIC) {
-         if (it && !has(it = STATIC ? it : it.prototype, TO_STRING_TAG)) {
-           defineProperty$1(it, TO_STRING_TAG, { configurable: true, value: TAG });
-         }
-       };
+       // `%IteratorPrototype%[@@iterator]()` method
+       // https://tc39.es/ecma262/#sec-%iteratorprototype%-@@iterator
+       if (!isCallable$g(IteratorPrototype$2[ITERATOR$a])) {
+         redefine$e(IteratorPrototype$2, ITERATOR$a, function () {
+           return this;
+         });
+       }
 
-       var aFunction$1 = function (it) {
-         if (typeof it != 'function') {
-           throw TypeError(String(it) + ' is not a function');
-         } return it;
+       var iteratorsCore = {
+         IteratorPrototype: IteratorPrototype$2,
+         BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS$1
        };
 
-       // optional / simple context binding
-       var functionBindContext = function (fn, that, length) {
-         aFunction$1(fn);
-         if (that === undefined) return fn;
-         switch (length) {
-           case 0: return function () {
-             return fn.call(that);
-           };
-           case 1: return function (a) {
-             return fn.call(that, a);
-           };
-           case 2: return function (a, b) {
-             return fn.call(that, a, b);
-           };
-           case 3: return function (a, b, c) {
-             return fn.call(that, a, b, c);
-           };
-         }
-         return function (/* ...args */) {
-           return fn.apply(that, arguments);
-         };
-       };
+       var defineProperty$9 = objectDefineProperty.f;
+       var hasOwn$c = hasOwnProperty_1;
+       var wellKnownSymbol$o = wellKnownSymbol$t;
 
-       var SPECIES = wellKnownSymbol('species');
+       var TO_STRING_TAG$4 = wellKnownSymbol$o('toStringTag');
 
-       // `ArraySpeciesCreate` abstract operation
-       // https://tc39.github.io/ecma262/#sec-arrayspeciescreate
-       var arraySpeciesCreate = function (originalArray, length) {
-         var C;
-         if (isArray(originalArray)) {
-           C = originalArray.constructor;
-           // cross-realm fallback
-           if (typeof C == 'function' && (C === Array || isArray(C.prototype))) C = undefined;
-           else if (isObject(C)) {
-             C = C[SPECIES];
-             if (C === null) C = undefined;
-           }
-         } return new (C === undefined ? Array : C)(length === 0 ? 0 : length);
+       var setToStringTag$a = function (it, TAG, STATIC) {
+         if (it && !hasOwn$c(it = STATIC ? it : it.prototype, TO_STRING_TAG$4)) {
+           defineProperty$9(it, TO_STRING_TAG$4, { configurable: true, value: TAG });
+         }
        };
 
-       var push = [].push;
+       var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
+       var create$9 = objectCreate;
+       var createPropertyDescriptor$4 = createPropertyDescriptor$7;
+       var setToStringTag$9 = setToStringTag$a;
+       var Iterators$4 = iterators;
 
-       // `Array.prototype.{ forEach, map, filter, some, every, find, findIndex }` methods implementation
-       var createMethod$1 = function (TYPE) {
-         var IS_MAP = TYPE == 1;
-         var IS_FILTER = TYPE == 2;
-         var IS_SOME = TYPE == 3;
-         var IS_EVERY = TYPE == 4;
-         var IS_FIND_INDEX = TYPE == 6;
-         var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
-         return function ($this, callbackfn, that, specificCreate) {
-           var O = toObject($this);
-           var self = indexedObject(O);
-           var boundFunction = functionBindContext(callbackfn, that, 3);
-           var length = toLength(self.length);
-           var index = 0;
-           var create = specificCreate || arraySpeciesCreate;
-           var target = IS_MAP ? create($this, length) : IS_FILTER ? create($this, 0) : undefined;
-           var value, result;
-           for (;length > index; index++) if (NO_HOLES || index in self) {
-             value = self[index];
-             result = boundFunction(value, index, O);
-             if (TYPE) {
-               if (IS_MAP) target[index] = result; // map
-               else if (result) switch (TYPE) {
-                 case 3: return true;              // some
-                 case 5: return value;             // find
-                 case 6: return index;             // findIndex
-                 case 2: push.call(target, value); // filter
-               } else if (IS_EVERY) return false;  // every
-             }
-           }
-           return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
-         };
-       };
+       var returnThis$1 = function () { return this; };
 
-       var arrayIteration = {
-         // `Array.prototype.forEach` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.foreach
-         forEach: createMethod$1(0),
-         // `Array.prototype.map` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.map
-         map: createMethod$1(1),
-         // `Array.prototype.filter` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.filter
-         filter: createMethod$1(2),
-         // `Array.prototype.some` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.some
-         some: createMethod$1(3),
-         // `Array.prototype.every` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.every
-         every: createMethod$1(4),
-         // `Array.prototype.find` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.find
-         find: createMethod$1(5),
-         // `Array.prototype.findIndex` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.findIndex
-         findIndex: createMethod$1(6)
+       var createIteratorConstructor$2 = function (IteratorConstructor, NAME, next) {
+         var TO_STRING_TAG = NAME + ' Iterator';
+         IteratorConstructor.prototype = create$9(IteratorPrototype$1, { next: createPropertyDescriptor$4(1, next) });
+         setToStringTag$9(IteratorConstructor, TO_STRING_TAG, false);
+         Iterators$4[TO_STRING_TAG] = returnThis$1;
+         return IteratorConstructor;
        };
 
-       var $forEach = arrayIteration.forEach;
-
-       var HIDDEN = sharedKey('hidden');
-       var SYMBOL = 'Symbol';
-       var PROTOTYPE$1 = 'prototype';
-       var TO_PRIMITIVE = wellKnownSymbol('toPrimitive');
-       var setInternalState = internalState.set;
-       var getInternalState = internalState.getterFor(SYMBOL);
-       var ObjectPrototype = Object[PROTOTYPE$1];
-       var $Symbol = global_1.Symbol;
-       var $stringify = getBuiltIn('JSON', 'stringify');
-       var nativeGetOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
-       var nativeDefineProperty$1 = objectDefineProperty.f;
-       var nativeGetOwnPropertyNames$1 = objectGetOwnPropertyNamesExternal.f;
-       var nativePropertyIsEnumerable$1 = objectPropertyIsEnumerable.f;
-       var AllSymbols = shared('symbols');
-       var ObjectPrototypeSymbols = shared('op-symbols');
-       var StringToSymbolRegistry = shared('string-to-symbol-registry');
-       var SymbolToStringRegistry = shared('symbol-to-string-registry');
-       var WellKnownSymbolsStore$1 = shared('wks');
-       var QObject = global_1.QObject;
-       // Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
-       var USE_SETTER = !QObject || !QObject[PROTOTYPE$1] || !QObject[PROTOTYPE$1].findChild;
+       var global$Z = global$1m;
+       var isCallable$f = isCallable$r;
 
-       // fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
-       var setSymbolDescriptor = descriptors && fails(function () {
-         return objectCreate(nativeDefineProperty$1({}, 'a', {
-           get: function () { return nativeDefineProperty$1(this, 'a', { value: 7 }).a; }
-         })).a != 7;
-       }) ? function (O, P, Attributes) {
-         var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$1(ObjectPrototype, P);
-         if (ObjectPrototypeDescriptor) delete ObjectPrototype[P];
-         nativeDefineProperty$1(O, P, Attributes);
-         if (ObjectPrototypeDescriptor && O !== ObjectPrototype) {
-           nativeDefineProperty$1(ObjectPrototype, P, ObjectPrototypeDescriptor);
-         }
-       } : nativeDefineProperty$1;
+       var String$4 = global$Z.String;
+       var TypeError$h = global$Z.TypeError;
 
-       var wrap = function (tag, description) {
-         var symbol = AllSymbols[tag] = objectCreate($Symbol[PROTOTYPE$1]);
-         setInternalState(symbol, {
-           type: SYMBOL,
-           tag: tag,
-           description: description
-         });
-         if (!descriptors) symbol.description = description;
-         return symbol;
+       var aPossiblePrototype$1 = function (argument) {
+         if (typeof argument == 'object' || isCallable$f(argument)) return argument;
+         throw TypeError$h("Can't set " + String$4(argument) + ' as a prototype');
        };
 
-       var isSymbol = useSymbolAsUid ? function (it) {
-         return typeof it == 'symbol';
-       } : function (it) {
-         return Object(it) instanceof $Symbol;
-       };
+       /* eslint-disable no-proto -- safe */
 
-       var $defineProperty = function defineProperty(O, P, Attributes) {
-         if (O === ObjectPrototype) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
-         anObject(O);
-         var key = toPrimitive(P, true);
-         anObject(Attributes);
-         if (has(AllSymbols, key)) {
-           if (!Attributes.enumerable) {
-             if (!has(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor(1, {}));
+       var uncurryThis$M = functionUncurryThis;
+       var anObject$i = anObject$n;
+       var aPossiblePrototype = aPossiblePrototype$1;
+
+       // `Object.setPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.setprototypeof
+       // Works with __proto__ only. Old v8 can't work with null proto objects.
+       // eslint-disable-next-line es/no-object-setprototypeof -- safe
+       var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
+         var CORRECT_SETTER = false;
+         var test = {};
+         var setter;
+         try {
+           // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+           setter = uncurryThis$M(Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set);
+           setter(test, []);
+           CORRECT_SETTER = test instanceof Array;
+         } catch (error) { /* empty */ }
+         return function setPrototypeOf(O, proto) {
+           anObject$i(O);
+           aPossiblePrototype(proto);
+           if (CORRECT_SETTER) setter(O, proto);
+           else O.__proto__ = proto;
+           return O;
+         };
+       }() : undefined);
+
+       var $$1c = _export;
+       var call$l = functionCall;
+       var FunctionName$1 = functionName;
+       var isCallable$e = isCallable$r;
+       var createIteratorConstructor$1 = createIteratorConstructor$2;
+       var getPrototypeOf$3 = objectGetPrototypeOf;
+       var setPrototypeOf$6 = objectSetPrototypeOf;
+       var setToStringTag$8 = setToStringTag$a;
+       var createNonEnumerableProperty$7 = createNonEnumerableProperty$b;
+       var redefine$d = redefine$h.exports;
+       var wellKnownSymbol$n = wellKnownSymbol$t;
+       var Iterators$3 = iterators;
+       var IteratorsCore = iteratorsCore;
+
+       var PROPER_FUNCTION_NAME$4 = FunctionName$1.PROPER;
+       var CONFIGURABLE_FUNCTION_NAME$1 = FunctionName$1.CONFIGURABLE;
+       var IteratorPrototype = IteratorsCore.IteratorPrototype;
+       var BUGGY_SAFARI_ITERATORS = IteratorsCore.BUGGY_SAFARI_ITERATORS;
+       var ITERATOR$9 = wellKnownSymbol$n('iterator');
+       var KEYS = 'keys';
+       var VALUES = 'values';
+       var ENTRIES = 'entries';
+
+       var returnThis = function () { return this; };
+
+       var defineIterator$3 = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
+         createIteratorConstructor$1(IteratorConstructor, NAME, next);
+
+         var getIterationMethod = function (KIND) {
+           if (KIND === DEFAULT && defaultIterator) return defaultIterator;
+           if (!BUGGY_SAFARI_ITERATORS && KIND in IterablePrototype) return IterablePrototype[KIND];
+           switch (KIND) {
+             case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };
+             case VALUES: return function values() { return new IteratorConstructor(this, KIND); };
+             case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };
+           } return function () { return new IteratorConstructor(this); };
+         };
+
+         var TO_STRING_TAG = NAME + ' Iterator';
+         var INCORRECT_VALUES_NAME = false;
+         var IterablePrototype = Iterable.prototype;
+         var nativeIterator = IterablePrototype[ITERATOR$9]
+           || IterablePrototype['@@iterator']
+           || DEFAULT && IterablePrototype[DEFAULT];
+         var defaultIterator = !BUGGY_SAFARI_ITERATORS && nativeIterator || getIterationMethod(DEFAULT);
+         var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;
+         var CurrentIteratorPrototype, methods, KEY;
+
+         // fix native
+         if (anyNativeIterator) {
+           CurrentIteratorPrototype = getPrototypeOf$3(anyNativeIterator.call(new Iterable()));
+           if (CurrentIteratorPrototype !== Object.prototype && CurrentIteratorPrototype.next) {
+             if (getPrototypeOf$3(CurrentIteratorPrototype) !== IteratorPrototype) {
+               if (setPrototypeOf$6) {
+                 setPrototypeOf$6(CurrentIteratorPrototype, IteratorPrototype);
+               } else if (!isCallable$e(CurrentIteratorPrototype[ITERATOR$9])) {
+                 redefine$d(CurrentIteratorPrototype, ITERATOR$9, returnThis);
+               }
+             }
+             // Set @@toStringTag to native iterators
+             setToStringTag$8(CurrentIteratorPrototype, TO_STRING_TAG, true);
+           }
+         }
+
+         // fix Array.prototype.{ values, @@iterator }.name in V8 / FF
+         if (PROPER_FUNCTION_NAME$4 && DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
+           if (CONFIGURABLE_FUNCTION_NAME$1) {
+             createNonEnumerableProperty$7(IterablePrototype, 'name', VALUES);
+           } else {
+             INCORRECT_VALUES_NAME = true;
+             defaultIterator = function values() { return call$l(nativeIterator, this); };
+           }
+         }
+
+         // export additional methods
+         if (DEFAULT) {
+           methods = {
+             values: getIterationMethod(VALUES),
+             keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),
+             entries: getIterationMethod(ENTRIES)
+           };
+           if (FORCED) for (KEY in methods) {
+             if (BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
+               redefine$d(IterablePrototype, KEY, methods[KEY]);
+             }
+           } else $$1c({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS || INCORRECT_VALUES_NAME }, methods);
+         }
+
+         // define iterator
+         if (IterablePrototype[ITERATOR$9] !== defaultIterator) {
+           redefine$d(IterablePrototype, ITERATOR$9, defaultIterator, { name: DEFAULT });
+         }
+         Iterators$3[NAME] = defaultIterator;
+
+         return methods;
+       };
+
+       var toIndexedObject$7 = toIndexedObject$c;
+       var addToUnscopables$5 = addToUnscopables$6;
+       var Iterators$2 = iterators;
+       var InternalStateModule$8 = internalState;
+       var defineIterator$2 = defineIterator$3;
+
+       var ARRAY_ITERATOR = 'Array Iterator';
+       var setInternalState$8 = InternalStateModule$8.set;
+       var getInternalState$6 = InternalStateModule$8.getterFor(ARRAY_ITERATOR);
+
+       // `Array.prototype.entries` method
+       // https://tc39.es/ecma262/#sec-array.prototype.entries
+       // `Array.prototype.keys` method
+       // https://tc39.es/ecma262/#sec-array.prototype.keys
+       // `Array.prototype.values` method
+       // https://tc39.es/ecma262/#sec-array.prototype.values
+       // `Array.prototype[@@iterator]` method
+       // https://tc39.es/ecma262/#sec-array.prototype-@@iterator
+       // `CreateArrayIterator` internal method
+       // https://tc39.es/ecma262/#sec-createarrayiterator
+       var es_array_iterator = defineIterator$2(Array, 'Array', function (iterated, kind) {
+         setInternalState$8(this, {
+           type: ARRAY_ITERATOR,
+           target: toIndexedObject$7(iterated), // target
+           index: 0,                          // next index
+           kind: kind                         // kind
+         });
+       // `%ArrayIteratorPrototype%.next` method
+       // https://tc39.es/ecma262/#sec-%arrayiteratorprototype%.next
+       }, function () {
+         var state = getInternalState$6(this);
+         var target = state.target;
+         var kind = state.kind;
+         var index = state.index++;
+         if (!target || index >= target.length) {
+           state.target = undefined;
+           return { value: undefined, done: true };
+         }
+         if (kind == 'keys') return { value: index, done: false };
+         if (kind == 'values') return { value: target[index], done: false };
+         return { value: [index, target[index]], done: false };
+       }, 'values');
+
+       // argumentsList[@@iterator] is %ArrayProto_values%
+       // https://tc39.es/ecma262/#sec-createunmappedargumentsobject
+       // https://tc39.es/ecma262/#sec-createmappedargumentsobject
+       Iterators$2.Arguments = Iterators$2.Array;
+
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables$5('keys');
+       addToUnscopables$5('values');
+       addToUnscopables$5('entries');
+
+       var wellKnownSymbol$m = wellKnownSymbol$t;
+
+       var TO_STRING_TAG$3 = wellKnownSymbol$m('toStringTag');
+       var test$2 = {};
+
+       test$2[TO_STRING_TAG$3] = 'z';
+
+       var toStringTagSupport = String(test$2) === '[object z]';
+
+       var global$Y = global$1m;
+       var TO_STRING_TAG_SUPPORT$2 = toStringTagSupport;
+       var isCallable$d = isCallable$r;
+       var classofRaw = classofRaw$1;
+       var wellKnownSymbol$l = wellKnownSymbol$t;
+
+       var TO_STRING_TAG$2 = wellKnownSymbol$l('toStringTag');
+       var Object$1 = global$Y.Object;
+
+       // ES3 wrong here
+       var CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';
+
+       // fallback for IE11 Script Access Denied error
+       var tryGet = function (it, key) {
+         try {
+           return it[key];
+         } catch (error) { /* empty */ }
+       };
+
+       // getting tag from ES6+ `Object.prototype.toString`
+       var classof$d = TO_STRING_TAG_SUPPORT$2 ? classofRaw : function (it) {
+         var O, tag, result;
+         return it === undefined ? 'Undefined' : it === null ? 'Null'
+           // @@toStringTag case
+           : typeof (tag = tryGet(O = Object$1(it), TO_STRING_TAG$2)) == 'string' ? tag
+           // builtinTag case
+           : CORRECT_ARGUMENTS ? classofRaw(O)
+           // ES3 arguments fallback
+           : (result = classofRaw(O)) == 'Object' && isCallable$d(O.callee) ? 'Arguments' : result;
+       };
+
+       var TO_STRING_TAG_SUPPORT$1 = toStringTagSupport;
+       var classof$c = classof$d;
+
+       // `Object.prototype.toString` method implementation
+       // https://tc39.es/ecma262/#sec-object.prototype.tostring
+       var objectToString$1 = TO_STRING_TAG_SUPPORT$1 ? {}.toString : function toString() {
+         return '[object ' + classof$c(this) + ']';
+       };
+
+       var TO_STRING_TAG_SUPPORT = toStringTagSupport;
+       var redefine$c = redefine$h.exports;
+       var toString$l = objectToString$1;
+
+       // `Object.prototype.toString` method
+       // https://tc39.es/ecma262/#sec-object.prototype.tostring
+       if (!TO_STRING_TAG_SUPPORT) {
+         redefine$c(Object.prototype, 'toString', toString$l, { unsafe: true });
+       }
+
+       var global$X = global$1m;
+       var classof$b = classof$d;
+
+       var String$3 = global$X.String;
+
+       var toString$k = function (argument) {
+         if (classof$b(argument) === 'Symbol') throw TypeError('Cannot convert a Symbol value to a string');
+         return String$3(argument);
+       };
+
+       var uncurryThis$L = functionUncurryThis;
+       var toIntegerOrInfinity$8 = toIntegerOrInfinity$b;
+       var toString$j = toString$k;
+       var requireObjectCoercible$b = requireObjectCoercible$e;
+
+       var charAt$8 = uncurryThis$L(''.charAt);
+       var charCodeAt$2 = uncurryThis$L(''.charCodeAt);
+       var stringSlice$b = uncurryThis$L(''.slice);
+
+       var createMethod$5 = function (CONVERT_TO_STRING) {
+         return function ($this, pos) {
+           var S = toString$j(requireObjectCoercible$b($this));
+           var position = toIntegerOrInfinity$8(pos);
+           var size = S.length;
+           var first, second;
+           if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;
+           first = charCodeAt$2(S, position);
+           return first < 0xD800 || first > 0xDBFF || position + 1 === size
+             || (second = charCodeAt$2(S, position + 1)) < 0xDC00 || second > 0xDFFF
+               ? CONVERT_TO_STRING
+                 ? charAt$8(S, position)
+                 : first
+               : CONVERT_TO_STRING
+                 ? stringSlice$b(S, position, position + 2)
+                 : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;
+         };
+       };
+
+       var stringMultibyte = {
+         // `String.prototype.codePointAt` method
+         // https://tc39.es/ecma262/#sec-string.prototype.codepointat
+         codeAt: createMethod$5(false),
+         // `String.prototype.at` method
+         // https://github.com/mathiasbynens/String.prototype.at
+         charAt: createMethod$5(true)
+       };
+
+       var charAt$7 = stringMultibyte.charAt;
+       var toString$i = toString$k;
+       var InternalStateModule$7 = internalState;
+       var defineIterator$1 = defineIterator$3;
+
+       var STRING_ITERATOR = 'String Iterator';
+       var setInternalState$7 = InternalStateModule$7.set;
+       var getInternalState$5 = InternalStateModule$7.getterFor(STRING_ITERATOR);
+
+       // `String.prototype[@@iterator]` method
+       // https://tc39.es/ecma262/#sec-string.prototype-@@iterator
+       defineIterator$1(String, 'String', function (iterated) {
+         setInternalState$7(this, {
+           type: STRING_ITERATOR,
+           string: toString$i(iterated),
+           index: 0
+         });
+       // `%StringIteratorPrototype%.next` method
+       // https://tc39.es/ecma262/#sec-%stringiteratorprototype%.next
+       }, function next() {
+         var state = getInternalState$5(this);
+         var string = state.string;
+         var index = state.index;
+         var point;
+         if (index >= string.length) return { value: undefined, done: true };
+         point = charAt$7(string, index);
+         state.index += point.length;
+         return { value: point, done: false };
+       });
+
+       // iterable DOM collections
+       // flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods
+       var domIterables = {
+         CSSRuleList: 0,
+         CSSStyleDeclaration: 0,
+         CSSValueList: 0,
+         ClientRectList: 0,
+         DOMRectList: 0,
+         DOMStringList: 0,
+         DOMTokenList: 1,
+         DataTransferItemList: 0,
+         FileList: 0,
+         HTMLAllCollection: 0,
+         HTMLCollection: 0,
+         HTMLFormElement: 0,
+         HTMLSelectElement: 0,
+         MediaList: 0,
+         MimeTypeArray: 0,
+         NamedNodeMap: 0,
+         NodeList: 1,
+         PaintRequestList: 0,
+         Plugin: 0,
+         PluginArray: 0,
+         SVGLengthList: 0,
+         SVGNumberList: 0,
+         SVGPathSegList: 0,
+         SVGPointList: 0,
+         SVGStringList: 0,
+         SVGTransformList: 0,
+         SourceBufferList: 0,
+         StyleSheetList: 0,
+         TextTrackCueList: 0,
+         TextTrackList: 0,
+         TouchList: 0
+       };
+
+       // in old WebKit versions, `element.classList` is not an instance of global `DOMTokenList`
+       var documentCreateElement = documentCreateElement$2;
+
+       var classList$1 = documentCreateElement('span').classList;
+       var DOMTokenListPrototype$2 = classList$1 && classList$1.constructor && classList$1.constructor.prototype;
+
+       var domTokenListPrototype = DOMTokenListPrototype$2 === Object.prototype ? undefined : DOMTokenListPrototype$2;
+
+       var global$W = global$1m;
+       var DOMIterables$1 = domIterables;
+       var DOMTokenListPrototype$1 = domTokenListPrototype;
+       var ArrayIteratorMethods = es_array_iterator;
+       var createNonEnumerableProperty$6 = createNonEnumerableProperty$b;
+       var wellKnownSymbol$k = wellKnownSymbol$t;
+
+       var ITERATOR$8 = wellKnownSymbol$k('iterator');
+       var TO_STRING_TAG$1 = wellKnownSymbol$k('toStringTag');
+       var ArrayValues = ArrayIteratorMethods.values;
+
+       var handlePrototype$1 = function (CollectionPrototype, COLLECTION_NAME) {
+         if (CollectionPrototype) {
+           // some Chrome versions have non-configurable methods on DOMTokenList
+           if (CollectionPrototype[ITERATOR$8] !== ArrayValues) try {
+             createNonEnumerableProperty$6(CollectionPrototype, ITERATOR$8, ArrayValues);
+           } catch (error) {
+             CollectionPrototype[ITERATOR$8] = ArrayValues;
+           }
+           if (!CollectionPrototype[TO_STRING_TAG$1]) {
+             createNonEnumerableProperty$6(CollectionPrototype, TO_STRING_TAG$1, COLLECTION_NAME);
+           }
+           if (DOMIterables$1[COLLECTION_NAME]) for (var METHOD_NAME in ArrayIteratorMethods) {
+             // some Chrome versions have non-configurable methods on DOMTokenList
+             if (CollectionPrototype[METHOD_NAME] !== ArrayIteratorMethods[METHOD_NAME]) try {
+               createNonEnumerableProperty$6(CollectionPrototype, METHOD_NAME, ArrayIteratorMethods[METHOD_NAME]);
+             } catch (error) {
+               CollectionPrototype[METHOD_NAME] = ArrayIteratorMethods[METHOD_NAME];
+             }
+           }
+         }
+       };
+
+       for (var COLLECTION_NAME$1 in DOMIterables$1) {
+         handlePrototype$1(global$W[COLLECTION_NAME$1] && global$W[COLLECTION_NAME$1].prototype, COLLECTION_NAME$1);
+       }
+
+       handlePrototype$1(DOMTokenListPrototype$1, 'DOMTokenList');
+
+       var FunctionPrototype$1 = Function.prototype;
+       var apply$9 = FunctionPrototype$1.apply;
+       var bind$g = FunctionPrototype$1.bind;
+       var call$k = FunctionPrototype$1.call;
+
+       // eslint-disable-next-line es/no-reflect -- safe
+       var functionApply = typeof Reflect == 'object' && Reflect.apply || (bind$g ? call$k.bind(apply$9) : function () {
+         return call$k.apply(apply$9, arguments);
+       });
+
+       var classof$a = classofRaw$1;
+
+       // `IsArray` abstract operation
+       // https://tc39.es/ecma262/#sec-isarray
+       // eslint-disable-next-line es/no-array-isarray -- safe
+       var isArray$8 = Array.isArray || function isArray(argument) {
+         return classof$a(argument) == 'Array';
+       };
+
+       var objectGetOwnPropertyNamesExternal = {};
+
+       var uncurryThis$K = functionUncurryThis;
+
+       var arraySlice$c = uncurryThis$K([].slice);
+
+       /* eslint-disable es/no-object-getownpropertynames -- safe */
+
+       var classof$9 = classofRaw$1;
+       var toIndexedObject$6 = toIndexedObject$c;
+       var $getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+       var arraySlice$b = arraySlice$c;
+
+       var windowNames = typeof window == 'object' && window && Object.getOwnPropertyNames
+         ? Object.getOwnPropertyNames(window) : [];
+
+       var getWindowNames = function (it) {
+         try {
+           return $getOwnPropertyNames$1(it);
+         } catch (error) {
+           return arraySlice$b(windowNames);
+         }
+       };
+
+       // fallback for IE11 buggy Object.getOwnPropertyNames with iframe and window
+       objectGetOwnPropertyNamesExternal.f = function getOwnPropertyNames(it) {
+         return windowNames && classof$9(it) == 'Window'
+           ? getWindowNames(it)
+           : $getOwnPropertyNames$1(toIndexedObject$6(it));
+       };
+
+       var uncurryThis$J = functionUncurryThis;
+       var aCallable$8 = aCallable$a;
+
+       var bind$f = uncurryThis$J(uncurryThis$J.bind);
+
+       // optional / simple context binding
+       var functionBindContext = function (fn, that) {
+         aCallable$8(fn);
+         return that === undefined ? fn : bind$f ? bind$f(fn, that) : function (/* ...args */) {
+           return fn.apply(that, arguments);
+         };
+       };
+
+       var uncurryThis$I = functionUncurryThis;
+       var fails$K = fails$S;
+       var isCallable$c = isCallable$r;
+       var classof$8 = classof$d;
+       var getBuiltIn$6 = getBuiltIn$b;
+       var inspectSource$1 = inspectSource$4;
+
+       var noop$2 = function () { /* empty */ };
+       var empty$1 = [];
+       var construct$1 = getBuiltIn$6('Reflect', 'construct');
+       var constructorRegExp = /^\s*(?:class|function)\b/;
+       var exec$6 = uncurryThis$I(constructorRegExp.exec);
+       var INCORRECT_TO_STRING = !constructorRegExp.exec(noop$2);
+
+       var isConstructorModern = function (argument) {
+         if (!isCallable$c(argument)) return false;
+         try {
+           construct$1(noop$2, empty$1, argument);
+           return true;
+         } catch (error) {
+           return false;
+         }
+       };
+
+       var isConstructorLegacy = function (argument) {
+         if (!isCallable$c(argument)) return false;
+         switch (classof$8(argument)) {
+           case 'AsyncFunction':
+           case 'GeneratorFunction':
+           case 'AsyncGeneratorFunction': return false;
+           // we can't check .prototype since constructors produced by .bind haven't it
+         } return INCORRECT_TO_STRING || !!exec$6(constructorRegExp, inspectSource$1(argument));
+       };
+
+       // `IsConstructor` abstract operation
+       // https://tc39.es/ecma262/#sec-isconstructor
+       var isConstructor$4 = !construct$1 || fails$K(function () {
+         var called;
+         return isConstructorModern(isConstructorModern.call)
+           || !isConstructorModern(Object)
+           || !isConstructorModern(function () { called = true; })
+           || called;
+       }) ? isConstructorLegacy : isConstructorModern;
+
+       var global$V = global$1m;
+       var isArray$7 = isArray$8;
+       var isConstructor$3 = isConstructor$4;
+       var isObject$m = isObject$s;
+       var wellKnownSymbol$j = wellKnownSymbol$t;
+
+       var SPECIES$6 = wellKnownSymbol$j('species');
+       var Array$6 = global$V.Array;
+
+       // a part of `ArraySpeciesCreate` abstract operation
+       // https://tc39.es/ecma262/#sec-arrayspeciescreate
+       var arraySpeciesConstructor$1 = function (originalArray) {
+         var C;
+         if (isArray$7(originalArray)) {
+           C = originalArray.constructor;
+           // cross-realm fallback
+           if (isConstructor$3(C) && (C === Array$6 || isArray$7(C.prototype))) C = undefined;
+           else if (isObject$m(C)) {
+             C = C[SPECIES$6];
+             if (C === null) C = undefined;
+           }
+         } return C === undefined ? Array$6 : C;
+       };
+
+       var arraySpeciesConstructor = arraySpeciesConstructor$1;
+
+       // `ArraySpeciesCreate` abstract operation
+       // https://tc39.es/ecma262/#sec-arrayspeciescreate
+       var arraySpeciesCreate$4 = function (originalArray, length) {
+         return new (arraySpeciesConstructor(originalArray))(length === 0 ? 0 : length);
+       };
+
+       var bind$e = functionBindContext;
+       var uncurryThis$H = functionUncurryThis;
+       var IndexedObject$3 = indexedObject;
+       var toObject$g = toObject$j;
+       var lengthOfArrayLike$e = lengthOfArrayLike$g;
+       var arraySpeciesCreate$3 = arraySpeciesCreate$4;
+
+       var push$9 = uncurryThis$H([].push);
+
+       // `Array.prototype.{ forEach, map, filter, some, every, find, findIndex, filterReject }` methods implementation
+       var createMethod$4 = function (TYPE) {
+         var IS_MAP = TYPE == 1;
+         var IS_FILTER = TYPE == 2;
+         var IS_SOME = TYPE == 3;
+         var IS_EVERY = TYPE == 4;
+         var IS_FIND_INDEX = TYPE == 6;
+         var IS_FILTER_REJECT = TYPE == 7;
+         var NO_HOLES = TYPE == 5 || IS_FIND_INDEX;
+         return function ($this, callbackfn, that, specificCreate) {
+           var O = toObject$g($this);
+           var self = IndexedObject$3(O);
+           var boundFunction = bind$e(callbackfn, that);
+           var length = lengthOfArrayLike$e(self);
+           var index = 0;
+           var create = specificCreate || arraySpeciesCreate$3;
+           var target = IS_MAP ? create($this, length) : IS_FILTER || IS_FILTER_REJECT ? create($this, 0) : undefined;
+           var value, result;
+           for (;length > index; index++) if (NO_HOLES || index in self) {
+             value = self[index];
+             result = boundFunction(value, index, O);
+             if (TYPE) {
+               if (IS_MAP) target[index] = result; // map
+               else if (result) switch (TYPE) {
+                 case 3: return true;              // some
+                 case 5: return value;             // find
+                 case 6: return index;             // findIndex
+                 case 2: push$9(target, value);      // filter
+               } else switch (TYPE) {
+                 case 4: return false;             // every
+                 case 7: push$9(target, value);      // filterReject
+               }
+             }
+           }
+           return IS_FIND_INDEX ? -1 : IS_SOME || IS_EVERY ? IS_EVERY : target;
+         };
+       };
+
+       var arrayIteration = {
+         // `Array.prototype.forEach` method
+         // https://tc39.es/ecma262/#sec-array.prototype.foreach
+         forEach: createMethod$4(0),
+         // `Array.prototype.map` method
+         // https://tc39.es/ecma262/#sec-array.prototype.map
+         map: createMethod$4(1),
+         // `Array.prototype.filter` method
+         // https://tc39.es/ecma262/#sec-array.prototype.filter
+         filter: createMethod$4(2),
+         // `Array.prototype.some` method
+         // https://tc39.es/ecma262/#sec-array.prototype.some
+         some: createMethod$4(3),
+         // `Array.prototype.every` method
+         // https://tc39.es/ecma262/#sec-array.prototype.every
+         every: createMethod$4(4),
+         // `Array.prototype.find` method
+         // https://tc39.es/ecma262/#sec-array.prototype.find
+         find: createMethod$4(5),
+         // `Array.prototype.findIndex` method
+         // https://tc39.es/ecma262/#sec-array.prototype.findIndex
+         findIndex: createMethod$4(6),
+         // `Array.prototype.filterReject` method
+         // https://github.com/tc39/proposal-array-filtering
+         filterReject: createMethod$4(7)
+       };
+
+       var $$1b = _export;
+       var global$U = global$1m;
+       var getBuiltIn$5 = getBuiltIn$b;
+       var apply$8 = functionApply;
+       var call$j = functionCall;
+       var uncurryThis$G = functionUncurryThis;
+       var DESCRIPTORS$h = descriptors;
+       var NATIVE_SYMBOL$1 = nativeSymbol;
+       var fails$J = fails$S;
+       var hasOwn$b = hasOwnProperty_1;
+       var isArray$6 = isArray$8;
+       var isCallable$b = isCallable$r;
+       var isObject$l = isObject$s;
+       var isPrototypeOf$8 = objectIsPrototypeOf;
+       var isSymbol$3 = isSymbol$6;
+       var anObject$h = anObject$n;
+       var toObject$f = toObject$j;
+       var toIndexedObject$5 = toIndexedObject$c;
+       var toPropertyKey$2 = toPropertyKey$5;
+       var $toString$3 = toString$k;
+       var createPropertyDescriptor$3 = createPropertyDescriptor$7;
+       var nativeObjectCreate = objectCreate;
+       var objectKeys$2 = objectKeys$4;
+       var getOwnPropertyNamesModule$1 = objectGetOwnPropertyNames;
+       var getOwnPropertyNamesExternal = objectGetOwnPropertyNamesExternal;
+       var getOwnPropertySymbolsModule$1 = objectGetOwnPropertySymbols;
+       var getOwnPropertyDescriptorModule$2 = objectGetOwnPropertyDescriptor;
+       var definePropertyModule$3 = objectDefineProperty;
+       var propertyIsEnumerableModule$1 = objectPropertyIsEnumerable;
+       var arraySlice$a = arraySlice$c;
+       var redefine$b = redefine$h.exports;
+       var shared$1 = shared$5.exports;
+       var sharedKey = sharedKey$4;
+       var hiddenKeys$1 = hiddenKeys$6;
+       var uid$2 = uid$5;
+       var wellKnownSymbol$i = wellKnownSymbol$t;
+       var wrappedWellKnownSymbolModule = wellKnownSymbolWrapped;
+       var defineWellKnownSymbol$2 = defineWellKnownSymbol$4;
+       var setToStringTag$7 = setToStringTag$a;
+       var InternalStateModule$6 = internalState;
+       var $forEach$2 = arrayIteration.forEach;
+
+       var HIDDEN = sharedKey('hidden');
+       var SYMBOL = 'Symbol';
+       var PROTOTYPE$1 = 'prototype';
+       var TO_PRIMITIVE = wellKnownSymbol$i('toPrimitive');
+
+       var setInternalState$6 = InternalStateModule$6.set;
+       var getInternalState$4 = InternalStateModule$6.getterFor(SYMBOL);
+
+       var ObjectPrototype$3 = Object[PROTOTYPE$1];
+       var $Symbol = global$U.Symbol;
+       var SymbolPrototype$1 = $Symbol && $Symbol[PROTOTYPE$1];
+       var TypeError$g = global$U.TypeError;
+       var QObject = global$U.QObject;
+       var $stringify = getBuiltIn$5('JSON', 'stringify');
+       var nativeGetOwnPropertyDescriptor$2 = getOwnPropertyDescriptorModule$2.f;
+       var nativeDefineProperty$1 = definePropertyModule$3.f;
+       var nativeGetOwnPropertyNames = getOwnPropertyNamesExternal.f;
+       var nativePropertyIsEnumerable = propertyIsEnumerableModule$1.f;
+       var push$8 = uncurryThis$G([].push);
+
+       var AllSymbols = shared$1('symbols');
+       var ObjectPrototypeSymbols = shared$1('op-symbols');
+       var StringToSymbolRegistry = shared$1('string-to-symbol-registry');
+       var SymbolToStringRegistry = shared$1('symbol-to-string-registry');
+       var WellKnownSymbolsStore = shared$1('wks');
+
+       // Don't use setters in Qt Script, https://github.com/zloirock/core-js/issues/173
+       var USE_SETTER = !QObject || !QObject[PROTOTYPE$1] || !QObject[PROTOTYPE$1].findChild;
+
+       // fallback for old Android, https://code.google.com/p/v8/issues/detail?id=687
+       var setSymbolDescriptor = DESCRIPTORS$h && fails$J(function () {
+         return nativeObjectCreate(nativeDefineProperty$1({}, 'a', {
+           get: function () { return nativeDefineProperty$1(this, 'a', { value: 7 }).a; }
+         })).a != 7;
+       }) ? function (O, P, Attributes) {
+         var ObjectPrototypeDescriptor = nativeGetOwnPropertyDescriptor$2(ObjectPrototype$3, P);
+         if (ObjectPrototypeDescriptor) delete ObjectPrototype$3[P];
+         nativeDefineProperty$1(O, P, Attributes);
+         if (ObjectPrototypeDescriptor && O !== ObjectPrototype$3) {
+           nativeDefineProperty$1(ObjectPrototype$3, P, ObjectPrototypeDescriptor);
+         }
+       } : nativeDefineProperty$1;
+
+       var wrap$2 = function (tag, description) {
+         var symbol = AllSymbols[tag] = nativeObjectCreate(SymbolPrototype$1);
+         setInternalState$6(symbol, {
+           type: SYMBOL,
+           tag: tag,
+           description: description
+         });
+         if (!DESCRIPTORS$h) symbol.description = description;
+         return symbol;
+       };
+
+       var $defineProperty = function defineProperty(O, P, Attributes) {
+         if (O === ObjectPrototype$3) $defineProperty(ObjectPrototypeSymbols, P, Attributes);
+         anObject$h(O);
+         var key = toPropertyKey$2(P);
+         anObject$h(Attributes);
+         if (hasOwn$b(AllSymbols, key)) {
+           if (!Attributes.enumerable) {
+             if (!hasOwn$b(O, HIDDEN)) nativeDefineProperty$1(O, HIDDEN, createPropertyDescriptor$3(1, {}));
              O[HIDDEN][key] = true;
            } else {
-             if (has(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
-             Attributes = objectCreate(Attributes, { enumerable: createPropertyDescriptor(0, false) });
+             if (hasOwn$b(O, HIDDEN) && O[HIDDEN][key]) O[HIDDEN][key] = false;
+             Attributes = nativeObjectCreate(Attributes, { enumerable: createPropertyDescriptor$3(0, false) });
            } return setSymbolDescriptor(O, key, Attributes);
          } return nativeDefineProperty$1(O, key, Attributes);
        };
 
        var $defineProperties = function defineProperties(O, Properties) {
-         anObject(O);
-         var properties = toIndexedObject(Properties);
-         var keys = objectKeys(properties).concat($getOwnPropertySymbols(properties));
-         $forEach(keys, function (key) {
-           if (!descriptors || $propertyIsEnumerable.call(properties, key)) $defineProperty(O, key, properties[key]);
+         anObject$h(O);
+         var properties = toIndexedObject$5(Properties);
+         var keys = objectKeys$2(properties).concat($getOwnPropertySymbols(properties));
+         $forEach$2(keys, function (key) {
+           if (!DESCRIPTORS$h || call$j($propertyIsEnumerable$1, properties, key)) $defineProperty(O, key, properties[key]);
          });
          return O;
        };
 
        var $create = function create(O, Properties) {
-         return Properties === undefined ? objectCreate(O) : $defineProperties(objectCreate(O), Properties);
+         return Properties === undefined ? nativeObjectCreate(O) : $defineProperties(nativeObjectCreate(O), Properties);
        };
 
-       var $propertyIsEnumerable = function propertyIsEnumerable(V) {
-         var P = toPrimitive(V, true);
-         var enumerable = nativePropertyIsEnumerable$1.call(this, P);
-         if (this === ObjectPrototype && has(AllSymbols, P) && !has(ObjectPrototypeSymbols, P)) return false;
-         return enumerable || !has(this, P) || !has(AllSymbols, P) || has(this, HIDDEN) && this[HIDDEN][P] ? enumerable : true;
+       var $propertyIsEnumerable$1 = function propertyIsEnumerable(V) {
+         var P = toPropertyKey$2(V);
+         var enumerable = call$j(nativePropertyIsEnumerable, this, P);
+         if (this === ObjectPrototype$3 && hasOwn$b(AllSymbols, P) && !hasOwn$b(ObjectPrototypeSymbols, P)) return false;
+         return enumerable || !hasOwn$b(this, P) || !hasOwn$b(AllSymbols, P) || hasOwn$b(this, HIDDEN) && this[HIDDEN][P]
+           ? enumerable : true;
        };
 
        var $getOwnPropertyDescriptor = function getOwnPropertyDescriptor(O, P) {
-         var it = toIndexedObject(O);
-         var key = toPrimitive(P, true);
-         if (it === ObjectPrototype && has(AllSymbols, key) && !has(ObjectPrototypeSymbols, key)) return;
-         var descriptor = nativeGetOwnPropertyDescriptor$1(it, key);
-         if (descriptor && has(AllSymbols, key) && !(has(it, HIDDEN) && it[HIDDEN][key])) {
+         var it = toIndexedObject$5(O);
+         var key = toPropertyKey$2(P);
+         if (it === ObjectPrototype$3 && hasOwn$b(AllSymbols, key) && !hasOwn$b(ObjectPrototypeSymbols, key)) return;
+         var descriptor = nativeGetOwnPropertyDescriptor$2(it, key);
+         if (descriptor && hasOwn$b(AllSymbols, key) && !(hasOwn$b(it, HIDDEN) && it[HIDDEN][key])) {
            descriptor.enumerable = true;
          }
          return descriptor;
        };
 
        var $getOwnPropertyNames = function getOwnPropertyNames(O) {
-         var names = nativeGetOwnPropertyNames$1(toIndexedObject(O));
+         var names = nativeGetOwnPropertyNames(toIndexedObject$5(O));
          var result = [];
-         $forEach(names, function (key) {
-           if (!has(AllSymbols, key) && !has(hiddenKeys, key)) result.push(key);
+         $forEach$2(names, function (key) {
+           if (!hasOwn$b(AllSymbols, key) && !hasOwn$b(hiddenKeys$1, key)) push$8(result, key);
          });
          return result;
        };
 
        var $getOwnPropertySymbols = function getOwnPropertySymbols(O) {
-         var IS_OBJECT_PROTOTYPE = O === ObjectPrototype;
-         var names = nativeGetOwnPropertyNames$1(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject(O));
+         var IS_OBJECT_PROTOTYPE = O === ObjectPrototype$3;
+         var names = nativeGetOwnPropertyNames(IS_OBJECT_PROTOTYPE ? ObjectPrototypeSymbols : toIndexedObject$5(O));
          var result = [];
-         $forEach(names, function (key) {
-           if (has(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || has(ObjectPrototype, key))) {
-             result.push(AllSymbols[key]);
+         $forEach$2(names, function (key) {
+           if (hasOwn$b(AllSymbols, key) && (!IS_OBJECT_PROTOTYPE || hasOwn$b(ObjectPrototype$3, key))) {
+             push$8(result, AllSymbols[key]);
            }
          });
          return result;
        };
 
        // `Symbol` constructor
-       // https://tc39.github.io/ecma262/#sec-symbol-constructor
-       if (!nativeSymbol) {
+       // https://tc39.es/ecma262/#sec-symbol-constructor
+       if (!NATIVE_SYMBOL$1) {
          $Symbol = function Symbol() {
-           if (this instanceof $Symbol) throw TypeError('Symbol is not a constructor');
-           var description = !arguments.length || arguments[0] === undefined ? undefined : String(arguments[0]);
-           var tag = uid(description);
+           if (isPrototypeOf$8(SymbolPrototype$1, this)) throw TypeError$g('Symbol is not a constructor');
+           var description = !arguments.length || arguments[0] === undefined ? undefined : $toString$3(arguments[0]);
+           var tag = uid$2(description);
            var setter = function (value) {
-             if (this === ObjectPrototype) setter.call(ObjectPrototypeSymbols, value);
-             if (has(this, HIDDEN) && has(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
-             setSymbolDescriptor(this, tag, createPropertyDescriptor(1, value));
+             if (this === ObjectPrototype$3) call$j(setter, ObjectPrototypeSymbols, value);
+             if (hasOwn$b(this, HIDDEN) && hasOwn$b(this[HIDDEN], tag)) this[HIDDEN][tag] = false;
+             setSymbolDescriptor(this, tag, createPropertyDescriptor$3(1, value));
            };
-           if (descriptors && USE_SETTER) setSymbolDescriptor(ObjectPrototype, tag, { configurable: true, set: setter });
-           return wrap(tag, description);
+           if (DESCRIPTORS$h && USE_SETTER) setSymbolDescriptor(ObjectPrototype$3, tag, { configurable: true, set: setter });
+           return wrap$2(tag, description);
          };
 
-         redefine($Symbol[PROTOTYPE$1], 'toString', function toString() {
-           return getInternalState(this).tag;
+         SymbolPrototype$1 = $Symbol[PROTOTYPE$1];
+
+         redefine$b(SymbolPrototype$1, 'toString', function toString() {
+           return getInternalState$4(this).tag;
          });
 
-         redefine($Symbol, 'withoutSetter', function (description) {
-           return wrap(uid(description), description);
+         redefine$b($Symbol, 'withoutSetter', function (description) {
+           return wrap$2(uid$2(description), description);
          });
 
-         objectPropertyIsEnumerable.f = $propertyIsEnumerable;
-         objectDefineProperty.f = $defineProperty;
-         objectGetOwnPropertyDescriptor.f = $getOwnPropertyDescriptor;
-         objectGetOwnPropertyNames.f = objectGetOwnPropertyNamesExternal.f = $getOwnPropertyNames;
-         objectGetOwnPropertySymbols.f = $getOwnPropertySymbols;
+         propertyIsEnumerableModule$1.f = $propertyIsEnumerable$1;
+         definePropertyModule$3.f = $defineProperty;
+         getOwnPropertyDescriptorModule$2.f = $getOwnPropertyDescriptor;
+         getOwnPropertyNamesModule$1.f = getOwnPropertyNamesExternal.f = $getOwnPropertyNames;
+         getOwnPropertySymbolsModule$1.f = $getOwnPropertySymbols;
 
-         wellKnownSymbolWrapped.f = function (name) {
-           return wrap(wellKnownSymbol(name), name);
+         wrappedWellKnownSymbolModule.f = function (name) {
+           return wrap$2(wellKnownSymbol$i(name), name);
          };
 
-         if (descriptors) {
+         if (DESCRIPTORS$h) {
            // https://github.com/tc39/proposal-Symbol-description
-           nativeDefineProperty$1($Symbol[PROTOTYPE$1], 'description', {
+           nativeDefineProperty$1(SymbolPrototype$1, 'description', {
              configurable: true,
              get: function description() {
-               return getInternalState(this).description;
+               return getInternalState$4(this).description;
              }
            });
            {
-             redefine(ObjectPrototype, 'propertyIsEnumerable', $propertyIsEnumerable, { unsafe: true });
+             redefine$b(ObjectPrototype$3, 'propertyIsEnumerable', $propertyIsEnumerable$1, { unsafe: true });
            }
          }
        }
 
-       _export({ global: true, wrap: true, forced: !nativeSymbol, sham: !nativeSymbol }, {
+       $$1b({ global: true, wrap: true, forced: !NATIVE_SYMBOL$1, sham: !NATIVE_SYMBOL$1 }, {
          Symbol: $Symbol
        });
 
-       $forEach(objectKeys(WellKnownSymbolsStore$1), function (name) {
-         defineWellKnownSymbol(name);
+       $forEach$2(objectKeys$2(WellKnownSymbolsStore), function (name) {
+         defineWellKnownSymbol$2(name);
        });
 
-       _export({ target: SYMBOL, stat: true, forced: !nativeSymbol }, {
+       $$1b({ target: SYMBOL, stat: true, forced: !NATIVE_SYMBOL$1 }, {
          // `Symbol.for` method
-         // https://tc39.github.io/ecma262/#sec-symbol.for
+         // https://tc39.es/ecma262/#sec-symbol.for
          'for': function (key) {
-           var string = String(key);
-           if (has(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
+           var string = $toString$3(key);
+           if (hasOwn$b(StringToSymbolRegistry, string)) return StringToSymbolRegistry[string];
            var symbol = $Symbol(string);
            StringToSymbolRegistry[string] = symbol;
            SymbolToStringRegistry[symbol] = string;
            return symbol;
          },
          // `Symbol.keyFor` method
-         // https://tc39.github.io/ecma262/#sec-symbol.keyfor
+         // https://tc39.es/ecma262/#sec-symbol.keyfor
          keyFor: function keyFor(sym) {
-           if (!isSymbol(sym)) throw TypeError(sym + ' is not a symbol');
-           if (has(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
+           if (!isSymbol$3(sym)) throw TypeError$g(sym + ' is not a symbol');
+           if (hasOwn$b(SymbolToStringRegistry, sym)) return SymbolToStringRegistry[sym];
          },
          useSetter: function () { USE_SETTER = true; },
          useSimple: function () { USE_SETTER = false; }
        });
 
-       _export({ target: 'Object', stat: true, forced: !nativeSymbol, sham: !descriptors }, {
+       $$1b({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL$1, sham: !DESCRIPTORS$h }, {
          // `Object.create` method
-         // https://tc39.github.io/ecma262/#sec-object.create
+         // https://tc39.es/ecma262/#sec-object.create
          create: $create,
          // `Object.defineProperty` method
-         // https://tc39.github.io/ecma262/#sec-object.defineproperty
+         // https://tc39.es/ecma262/#sec-object.defineproperty
          defineProperty: $defineProperty,
          // `Object.defineProperties` method
-         // https://tc39.github.io/ecma262/#sec-object.defineproperties
+         // https://tc39.es/ecma262/#sec-object.defineproperties
          defineProperties: $defineProperties,
          // `Object.getOwnPropertyDescriptor` method
-         // https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptors
+         // https://tc39.es/ecma262/#sec-object.getownpropertydescriptors
          getOwnPropertyDescriptor: $getOwnPropertyDescriptor
        });
 
-       _export({ target: 'Object', stat: true, forced: !nativeSymbol }, {
+       $$1b({ target: 'Object', stat: true, forced: !NATIVE_SYMBOL$1 }, {
          // `Object.getOwnPropertyNames` method
-         // https://tc39.github.io/ecma262/#sec-object.getownpropertynames
+         // https://tc39.es/ecma262/#sec-object.getownpropertynames
          getOwnPropertyNames: $getOwnPropertyNames,
          // `Object.getOwnPropertySymbols` method
-         // https://tc39.github.io/ecma262/#sec-object.getownpropertysymbols
+         // https://tc39.es/ecma262/#sec-object.getownpropertysymbols
          getOwnPropertySymbols: $getOwnPropertySymbols
        });
 
        // Chrome 38 and 39 `Object.getOwnPropertySymbols` fails on primitives
        // https://bugs.chromium.org/p/v8/issues/detail?id=3443
-       _export({ target: 'Object', stat: true, forced: fails(function () { objectGetOwnPropertySymbols.f(1); }) }, {
+       $$1b({ target: 'Object', stat: true, forced: fails$J(function () { getOwnPropertySymbolsModule$1.f(1); }) }, {
          getOwnPropertySymbols: function getOwnPropertySymbols(it) {
-           return objectGetOwnPropertySymbols.f(toObject(it));
+           return getOwnPropertySymbolsModule$1.f(toObject$f(it));
          }
        });
 
        // `JSON.stringify` method behavior with symbols
-       // https://tc39.github.io/ecma262/#sec-json.stringify
+       // https://tc39.es/ecma262/#sec-json.stringify
        if ($stringify) {
-         var FORCED_JSON_STRINGIFY = !nativeSymbol || fails(function () {
+         var FORCED_JSON_STRINGIFY = !NATIVE_SYMBOL$1 || fails$J(function () {
            var symbol = $Symbol();
            // MS Edge converts symbol values to JSON as {}
            return $stringify([symbol]) != '[null]'
              || $stringify(Object(symbol)) != '{}';
          });
 
-         _export({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
-           // eslint-disable-next-line no-unused-vars
+         $$1b({ target: 'JSON', stat: true, forced: FORCED_JSON_STRINGIFY }, {
+           // eslint-disable-next-line no-unused-vars -- required for `.length`
            stringify: function stringify(it, replacer, space) {
-             var args = [it];
-             var index = 1;
-             var $replacer;
-             while (arguments.length > index) args.push(arguments[index++]);
-             $replacer = replacer;
-             if (!isObject(replacer) && it === undefined || isSymbol(it)) return; // IE8 returns string on undefined
-             if (!isArray(replacer)) replacer = function (key, value) {
-               if (typeof $replacer == 'function') value = $replacer.call(this, key, value);
-               if (!isSymbol(value)) return value;
+             var args = arraySlice$a(arguments);
+             var $replacer = replacer;
+             if (!isObject$l(replacer) && it === undefined || isSymbol$3(it)) return; // IE8 returns string on undefined
+             if (!isArray$6(replacer)) replacer = function (key, value) {
+               if (isCallable$b($replacer)) value = call$j($replacer, this, key, value);
+               if (!isSymbol$3(value)) return value;
              };
              args[1] = replacer;
-             return $stringify.apply(null, args);
+             return apply$8($stringify, null, args);
            }
          });
        }
 
        // `Symbol.prototype[@@toPrimitive]` method
-       // https://tc39.github.io/ecma262/#sec-symbol.prototype-@@toprimitive
-       if (!$Symbol[PROTOTYPE$1][TO_PRIMITIVE]) {
-         createNonEnumerableProperty($Symbol[PROTOTYPE$1], TO_PRIMITIVE, $Symbol[PROTOTYPE$1].valueOf);
+       // https://tc39.es/ecma262/#sec-symbol.prototype-@@toprimitive
+       if (!SymbolPrototype$1[TO_PRIMITIVE]) {
+         var valueOf = SymbolPrototype$1.valueOf;
+         // eslint-disable-next-line no-unused-vars -- required for .length
+         redefine$b(SymbolPrototype$1, TO_PRIMITIVE, function (hint) {
+           // TODO: improve hint logic
+           return call$j(valueOf, this);
+         });
        }
        // `Symbol.prototype[@@toStringTag]` property
-       // https://tc39.github.io/ecma262/#sec-symbol.prototype-@@tostringtag
-       setToStringTag($Symbol, SYMBOL);
-
-       hiddenKeys[HIDDEN] = true;
-
-       var defineProperty$2 = objectDefineProperty.f;
-
+       // https://tc39.es/ecma262/#sec-symbol.prototype-@@tostringtag
+       setToStringTag$7($Symbol, SYMBOL);
+
+       hiddenKeys$1[HIDDEN] = true;
+
+       var $$1a = _export;
+       var DESCRIPTORS$g = descriptors;
+       var global$T = global$1m;
+       var uncurryThis$F = functionUncurryThis;
+       var hasOwn$a = hasOwnProperty_1;
+       var isCallable$a = isCallable$r;
+       var isPrototypeOf$7 = objectIsPrototypeOf;
+       var toString$h = toString$k;
+       var defineProperty$8 = objectDefineProperty.f;
+       var copyConstructorProperties = copyConstructorProperties$2;
 
-       var NativeSymbol = global_1.Symbol;
+       var NativeSymbol = global$T.Symbol;
+       var SymbolPrototype = NativeSymbol && NativeSymbol.prototype;
 
-       if (descriptors && typeof NativeSymbol == 'function' && (!('description' in NativeSymbol.prototype) ||
+       if (DESCRIPTORS$g && isCallable$a(NativeSymbol) && (!('description' in SymbolPrototype) ||
          // Safari 12 bug
          NativeSymbol().description !== undefined
        )) {
          var EmptyStringDescriptionStore = {};
          // wrap Symbol constructor for correct work with undefined description
          var SymbolWrapper = function Symbol() {
-           var description = arguments.length < 1 || arguments[0] === undefined ? undefined : String(arguments[0]);
-           var result = this instanceof SymbolWrapper
+           var description = arguments.length < 1 || arguments[0] === undefined ? undefined : toString$h(arguments[0]);
+           var result = isPrototypeOf$7(SymbolPrototype, this)
              ? new NativeSymbol(description)
              // in Edge 13, String(Symbol(undefined)) === 'Symbol(undefined)'
              : description === undefined ? NativeSymbol() : NativeSymbol(description);
            if (description === '') EmptyStringDescriptionStore[result] = true;
            return result;
          };
+
          copyConstructorProperties(SymbolWrapper, NativeSymbol);
-         var symbolPrototype = SymbolWrapper.prototype = NativeSymbol.prototype;
-         symbolPrototype.constructor = SymbolWrapper;
+         SymbolWrapper.prototype = SymbolPrototype;
+         SymbolPrototype.constructor = SymbolWrapper;
 
-         var symbolToString = symbolPrototype.toString;
-         var native = String(NativeSymbol('test')) == 'Symbol(test)';
+         var NATIVE_SYMBOL = String(NativeSymbol('test')) == 'Symbol(test)';
+         var symbolToString$1 = uncurryThis$F(SymbolPrototype.toString);
+         var symbolValueOf = uncurryThis$F(SymbolPrototype.valueOf);
          var regexp = /^Symbol\((.*)\)[^)]+$/;
-         defineProperty$2(symbolPrototype, 'description', {
+         var replace$8 = uncurryThis$F(''.replace);
+         var stringSlice$a = uncurryThis$F(''.slice);
+
+         defineProperty$8(SymbolPrototype, 'description', {
            configurable: true,
            get: function description() {
-             var symbol = isObject(this) ? this.valueOf() : this;
-             var string = symbolToString.call(symbol);
-             if (has(EmptyStringDescriptionStore, symbol)) return '';
-             var desc = native ? string.slice(7, -1) : string.replace(regexp, '$1');
+             var symbol = symbolValueOf(this);
+             var string = symbolToString$1(symbol);
+             if (hasOwn$a(EmptyStringDescriptionStore, symbol)) return '';
+             var desc = NATIVE_SYMBOL ? stringSlice$a(string, 7, -1) : replace$8(string, regexp, '$1');
              return desc === '' ? undefined : desc;
            }
          });
 
-         _export({ global: true, forced: true }, {
+         $$1a({ global: true, forced: true }, {
            Symbol: SymbolWrapper
          });
        }
 
-       // `Symbol.iterator` well-known symbol
-       // https://tc39.github.io/ecma262/#sec-symbol.iterator
-       defineWellKnownSymbol('iterator');
+       // eslint-disable-next-line es/no-typed-arrays -- safe
+       var arrayBufferNative = typeof ArrayBuffer != 'undefined' && typeof DataView != 'undefined';
 
-       var arrayMethodIsStrict = function (METHOD_NAME, argument) {
-         var method = [][METHOD_NAME];
-         return !!method && fails(function () {
-           // eslint-disable-next-line no-useless-call,no-throw-literal
-           method.call(null, argument || function () { throw 1; }, 1);
-         });
+       var redefine$a = redefine$h.exports;
+
+       var redefineAll$4 = function (target, src, options) {
+         for (var key in src) redefine$a(target, key, src[key], options);
+         return target;
        };
 
-       var defineProperty$3 = Object.defineProperty;
-       var cache = {};
+       var global$S = global$1m;
+       var isPrototypeOf$6 = objectIsPrototypeOf;
 
-       var thrower = function (it) { throw it; };
+       var TypeError$f = global$S.TypeError;
 
-       var arrayMethodUsesToLength = function (METHOD_NAME, options) {
-         if (has(cache, METHOD_NAME)) return cache[METHOD_NAME];
-         if (!options) options = {};
-         var method = [][METHOD_NAME];
-         var ACCESSORS = has(options, 'ACCESSORS') ? options.ACCESSORS : false;
-         var argument0 = has(options, 0) ? options[0] : thrower;
-         var argument1 = has(options, 1) ? options[1] : undefined;
+       var anInstance$7 = function (it, Prototype) {
+         if (isPrototypeOf$6(Prototype, it)) return it;
+         throw TypeError$f('Incorrect invocation');
+       };
 
-         return cache[METHOD_NAME] = !!method && !fails(function () {
-           if (ACCESSORS && !descriptors) return true;
-           var O = { length: -1 };
+       var global$R = global$1m;
+       var toIntegerOrInfinity$7 = toIntegerOrInfinity$b;
+       var toLength$a = toLength$c;
 
-           if (ACCESSORS) defineProperty$3(O, 1, { enumerable: true, get: thrower });
-           else O[1] = 1;
+       var RangeError$b = global$R.RangeError;
 
-           method.call(O, argument0, argument1);
-         });
+       // `ToIndex` abstract operation
+       // https://tc39.es/ecma262/#sec-toindex
+       var toIndex$2 = function (it) {
+         if (it === undefined) return 0;
+         var number = toIntegerOrInfinity$7(it);
+         var length = toLength$a(number);
+         if (number !== length) throw RangeError$b('Wrong length or index');
+         return length;
        };
 
-       var $forEach$1 = arrayIteration.forEach;
-
-
+       // IEEE754 conversions based on https://github.com/feross/ieee754
+       var global$Q = global$1m;
 
-       var STRICT_METHOD = arrayMethodIsStrict('forEach');
-       var USES_TO_LENGTH = arrayMethodUsesToLength('forEach');
+       var Array$5 = global$Q.Array;
+       var abs$4 = Math.abs;
+       var pow$2 = Math.pow;
+       var floor$7 = Math.floor;
+       var log$2 = Math.log;
+       var LN2 = Math.LN2;
 
-       // `Array.prototype.forEach` method implementation
-       // https://tc39.github.io/ecma262/#sec-array.prototype.foreach
-       var arrayForEach = (!STRICT_METHOD || !USES_TO_LENGTH) ? function forEach(callbackfn /* , thisArg */) {
-         return $forEach$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-       } : [].forEach;
+       var pack = function (number, mantissaLength, bytes) {
+         var buffer = Array$5(bytes);
+         var exponentLength = bytes * 8 - mantissaLength - 1;
+         var eMax = (1 << exponentLength) - 1;
+         var eBias = eMax >> 1;
+         var rt = mantissaLength === 23 ? pow$2(2, -24) - pow$2(2, -77) : 0;
+         var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;
+         var index = 0;
+         var exponent, mantissa, c;
+         number = abs$4(number);
+         // eslint-disable-next-line no-self-compare -- NaN check
+         if (number != number || number === Infinity) {
+           // eslint-disable-next-line no-self-compare -- NaN check
+           mantissa = number != number ? 1 : 0;
+           exponent = eMax;
+         } else {
+           exponent = floor$7(log$2(number) / LN2);
+           if (number * (c = pow$2(2, -exponent)) < 1) {
+             exponent--;
+             c *= 2;
+           }
+           if (exponent + eBias >= 1) {
+             number += rt / c;
+           } else {
+             number += rt * pow$2(2, 1 - eBias);
+           }
+           if (number * c >= 2) {
+             exponent++;
+             c /= 2;
+           }
+           if (exponent + eBias >= eMax) {
+             mantissa = 0;
+             exponent = eMax;
+           } else if (exponent + eBias >= 1) {
+             mantissa = (number * c - 1) * pow$2(2, mantissaLength);
+             exponent = exponent + eBias;
+           } else {
+             mantissa = number * pow$2(2, eBias - 1) * pow$2(2, mantissaLength);
+             exponent = 0;
+           }
+         }
+         for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);
+         exponent = exponent << mantissaLength | mantissa;
+         exponentLength += mantissaLength;
+         for (; exponentLength > 0; buffer[index++] = exponent & 255, exponent /= 256, exponentLength -= 8);
+         buffer[--index] |= sign * 128;
+         return buffer;
+       };
 
-       // `Array.prototype.forEach` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.foreach
-       _export({ target: 'Array', proto: true, forced: [].forEach != arrayForEach }, {
-         forEach: arrayForEach
-       });
+       var unpack = function (buffer, mantissaLength) {
+         var bytes = buffer.length;
+         var exponentLength = bytes * 8 - mantissaLength - 1;
+         var eMax = (1 << exponentLength) - 1;
+         var eBias = eMax >> 1;
+         var nBits = exponentLength - 7;
+         var index = bytes - 1;
+         var sign = buffer[index--];
+         var exponent = sign & 127;
+         var mantissa;
+         sign >>= 7;
+         for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);
+         mantissa = exponent & (1 << -nBits) - 1;
+         exponent >>= -nBits;
+         nBits += mantissaLength;
+         for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);
+         if (exponent === 0) {
+           exponent = 1 - eBias;
+         } else if (exponent === eMax) {
+           return mantissa ? NaN : sign ? -Infinity : Infinity;
+         } else {
+           mantissa = mantissa + pow$2(2, mantissaLength);
+           exponent = exponent - eBias;
+         } return (sign ? -1 : 1) * mantissa * pow$2(2, exponent - mantissaLength);
+       };
 
-       var $indexOf = arrayIncludes.indexOf;
+       var ieee754$2 = {
+         pack: pack,
+         unpack: unpack
+       };
 
+       var toObject$e = toObject$j;
+       var toAbsoluteIndex$6 = toAbsoluteIndex$8;
+       var lengthOfArrayLike$d = lengthOfArrayLike$g;
 
+       // `Array.prototype.fill` method implementation
+       // https://tc39.es/ecma262/#sec-array.prototype.fill
+       var arrayFill$1 = function fill(value /* , start = 0, end = @length */) {
+         var O = toObject$e(this);
+         var length = lengthOfArrayLike$d(O);
+         var argumentsLength = arguments.length;
+         var index = toAbsoluteIndex$6(argumentsLength > 1 ? arguments[1] : undefined, length);
+         var end = argumentsLength > 2 ? arguments[2] : undefined;
+         var endPos = end === undefined ? length : toAbsoluteIndex$6(end, length);
+         while (endPos > index) O[index++] = value;
+         return O;
+       };
 
-       var nativeIndexOf = [].indexOf;
+       var global$P = global$1m;
+       var uncurryThis$E = functionUncurryThis;
+       var DESCRIPTORS$f = descriptors;
+       var NATIVE_ARRAY_BUFFER$2 = arrayBufferNative;
+       var FunctionName = functionName;
+       var createNonEnumerableProperty$5 = createNonEnumerableProperty$b;
+       var redefineAll$3 = redefineAll$4;
+       var fails$I = fails$S;
+       var anInstance$6 = anInstance$7;
+       var toIntegerOrInfinity$6 = toIntegerOrInfinity$b;
+       var toLength$9 = toLength$c;
+       var toIndex$1 = toIndex$2;
+       var IEEE754 = ieee754$2;
+       var getPrototypeOf$2 = objectGetPrototypeOf;
+       var setPrototypeOf$5 = objectSetPrototypeOf;
+       var getOwnPropertyNames$4 = objectGetOwnPropertyNames.f;
+       var defineProperty$7 = objectDefineProperty.f;
+       var arrayFill = arrayFill$1;
+       var arraySlice$9 = arraySlice$c;
+       var setToStringTag$6 = setToStringTag$a;
+       var InternalStateModule$5 = internalState;
+
+       var PROPER_FUNCTION_NAME$3 = FunctionName.PROPER;
+       var CONFIGURABLE_FUNCTION_NAME = FunctionName.CONFIGURABLE;
+       var getInternalState$3 = InternalStateModule$5.get;
+       var setInternalState$5 = InternalStateModule$5.set;
+       var ARRAY_BUFFER$1 = 'ArrayBuffer';
+       var DATA_VIEW = 'DataView';
+       var PROTOTYPE = 'prototype';
+       var WRONG_LENGTH$1 = 'Wrong length';
+       var WRONG_INDEX = 'Wrong index';
+       var NativeArrayBuffer$1 = global$P[ARRAY_BUFFER$1];
+       var $ArrayBuffer = NativeArrayBuffer$1;
+       var ArrayBufferPrototype$1 = $ArrayBuffer && $ArrayBuffer[PROTOTYPE];
+       var $DataView = global$P[DATA_VIEW];
+       var DataViewPrototype$1 = $DataView && $DataView[PROTOTYPE];
+       var ObjectPrototype$2 = Object.prototype;
+       var Array$4 = global$P.Array;
+       var RangeError$a = global$P.RangeError;
+       var fill$1 = uncurryThis$E(arrayFill);
+       var reverse = uncurryThis$E([].reverse);
 
-       var NEGATIVE_ZERO = !!nativeIndexOf && 1 / [1].indexOf(1, -0) < 0;
-       var STRICT_METHOD$1 = arrayMethodIsStrict('indexOf');
-       var USES_TO_LENGTH$1 = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
+       var packIEEE754 = IEEE754.pack;
+       var unpackIEEE754 = IEEE754.unpack;
 
-       // `Array.prototype.indexOf` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.indexof
-       _export({ target: 'Array', proto: true, forced: NEGATIVE_ZERO || !STRICT_METHOD$1 || !USES_TO_LENGTH$1 }, {
-         indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
-           return NEGATIVE_ZERO
-             // convert -0 to +0
-             ? nativeIndexOf.apply(this, arguments) || 0
-             : $indexOf(this, searchElement, arguments.length > 1 ? arguments[1] : undefined);
-         }
-       });
+       var packInt8 = function (number) {
+         return [number & 0xFF];
+       };
 
-       // `Array.isArray` method
-       // https://tc39.github.io/ecma262/#sec-array.isarray
-       _export({ target: 'Array', stat: true }, {
-         isArray: isArray
-       });
+       var packInt16 = function (number) {
+         return [number & 0xFF, number >> 8 & 0xFF];
+       };
 
-       var UNSCOPABLES = wellKnownSymbol('unscopables');
-       var ArrayPrototype = Array.prototype;
+       var packInt32 = function (number) {
+         return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
+       };
 
-       // Array.prototype[@@unscopables]
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-       if (ArrayPrototype[UNSCOPABLES] == undefined) {
-         objectDefineProperty.f(ArrayPrototype, UNSCOPABLES, {
-           configurable: true,
-           value: objectCreate(null)
-         });
-       }
+       var unpackInt32 = function (buffer) {
+         return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
+       };
 
-       // add a key to Array.prototype[@@unscopables]
-       var addToUnscopables = function (key) {
-         ArrayPrototype[UNSCOPABLES][key] = true;
+       var packFloat32 = function (number) {
+         return packIEEE754(number, 23, 4);
        };
 
-       var iterators = {};
+       var packFloat64 = function (number) {
+         return packIEEE754(number, 52, 8);
+       };
 
-       var correctPrototypeGetter = !fails(function () {
-         function F() { /* empty */ }
-         F.prototype.constructor = null;
-         return Object.getPrototypeOf(new F()) !== F.prototype;
-       });
+       var addGetter$1 = function (Constructor, key) {
+         defineProperty$7(Constructor[PROTOTYPE], key, { get: function () { return getInternalState$3(this)[key]; } });
+       };
 
-       var IE_PROTO$1 = sharedKey('IE_PROTO');
-       var ObjectPrototype$1 = Object.prototype;
+       var get$4 = function (view, count, index, isLittleEndian) {
+         var intIndex = toIndex$1(index);
+         var store = getInternalState$3(view);
+         if (intIndex + count > store.byteLength) throw RangeError$a(WRONG_INDEX);
+         var bytes = getInternalState$3(store.buffer).bytes;
+         var start = intIndex + store.byteOffset;
+         var pack = arraySlice$9(bytes, start, start + count);
+         return isLittleEndian ? pack : reverse(pack);
+       };
 
-       // `Object.getPrototypeOf` method
-       // https://tc39.github.io/ecma262/#sec-object.getprototypeof
-       var objectGetPrototypeOf = correctPrototypeGetter ? Object.getPrototypeOf : function (O) {
-         O = toObject(O);
-         if (has(O, IE_PROTO$1)) return O[IE_PROTO$1];
-         if (typeof O.constructor == 'function' && O instanceof O.constructor) {
-           return O.constructor.prototype;
-         } return O instanceof Object ? ObjectPrototype$1 : null;
+       var set$3 = function (view, count, index, conversion, value, isLittleEndian) {
+         var intIndex = toIndex$1(index);
+         var store = getInternalState$3(view);
+         if (intIndex + count > store.byteLength) throw RangeError$a(WRONG_INDEX);
+         var bytes = getInternalState$3(store.buffer).bytes;
+         var start = intIndex + store.byteOffset;
+         var pack = conversion(+value);
+         for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
        };
 
-       var ITERATOR = wellKnownSymbol('iterator');
-       var BUGGY_SAFARI_ITERATORS = false;
+       if (!NATIVE_ARRAY_BUFFER$2) {
+         $ArrayBuffer = function ArrayBuffer(length) {
+           anInstance$6(this, ArrayBufferPrototype$1);
+           var byteLength = toIndex$1(length);
+           setInternalState$5(this, {
+             bytes: fill$1(Array$4(byteLength), 0),
+             byteLength: byteLength
+           });
+           if (!DESCRIPTORS$f) this.byteLength = byteLength;
+         };
 
-       var returnThis = function () { return this; };
+         ArrayBufferPrototype$1 = $ArrayBuffer[PROTOTYPE];
 
-       // `%IteratorPrototype%` object
-       // https://tc39.github.io/ecma262/#sec-%iteratorprototype%-object
-       var IteratorPrototype, PrototypeOfArrayIteratorPrototype, arrayIterator;
+         $DataView = function DataView(buffer, byteOffset, byteLength) {
+           anInstance$6(this, DataViewPrototype$1);
+           anInstance$6(buffer, ArrayBufferPrototype$1);
+           var bufferLength = getInternalState$3(buffer).byteLength;
+           var offset = toIntegerOrInfinity$6(byteOffset);
+           if (offset < 0 || offset > bufferLength) throw RangeError$a('Wrong offset');
+           byteLength = byteLength === undefined ? bufferLength - offset : toLength$9(byteLength);
+           if (offset + byteLength > bufferLength) throw RangeError$a(WRONG_LENGTH$1);
+           setInternalState$5(this, {
+             buffer: buffer,
+             byteLength: byteLength,
+             byteOffset: offset
+           });
+           if (!DESCRIPTORS$f) {
+             this.buffer = buffer;
+             this.byteLength = byteLength;
+             this.byteOffset = offset;
+           }
+         };
 
-       if ([].keys) {
-         arrayIterator = [].keys();
-         // Safari 8 has buggy iterators w/o `next`
-         if (!('next' in arrayIterator)) BUGGY_SAFARI_ITERATORS = true;
-         else {
-           PrototypeOfArrayIteratorPrototype = objectGetPrototypeOf(objectGetPrototypeOf(arrayIterator));
-           if (PrototypeOfArrayIteratorPrototype !== Object.prototype) IteratorPrototype = PrototypeOfArrayIteratorPrototype;
-         }
-       }
+         DataViewPrototype$1 = $DataView[PROTOTYPE];
 
-       if (IteratorPrototype == undefined) IteratorPrototype = {};
+         if (DESCRIPTORS$f) {
+           addGetter$1($ArrayBuffer, 'byteLength');
+           addGetter$1($DataView, 'buffer');
+           addGetter$1($DataView, 'byteLength');
+           addGetter$1($DataView, 'byteOffset');
+         }
 
-       // 25.1.2.1.1 %IteratorPrototype%[@@iterator]()
-       if ( !has(IteratorPrototype, ITERATOR)) {
-         createNonEnumerableProperty(IteratorPrototype, ITERATOR, returnThis);
-       }
-
-       var iteratorsCore = {
-         IteratorPrototype: IteratorPrototype,
-         BUGGY_SAFARI_ITERATORS: BUGGY_SAFARI_ITERATORS
-       };
-
-       var IteratorPrototype$1 = iteratorsCore.IteratorPrototype;
-
-
-
-
-
-       var returnThis$1 = function () { return this; };
-
-       var createIteratorConstructor = function (IteratorConstructor, NAME, next) {
-         var TO_STRING_TAG = NAME + ' Iterator';
-         IteratorConstructor.prototype = objectCreate(IteratorPrototype$1, { next: createPropertyDescriptor(1, next) });
-         setToStringTag(IteratorConstructor, TO_STRING_TAG, false);
-         iterators[TO_STRING_TAG] = returnThis$1;
-         return IteratorConstructor;
-       };
-
-       var aPossiblePrototype = function (it) {
-         if (!isObject(it) && it !== null) {
-           throw TypeError("Can't set " + String(it) + ' as a prototype');
-         } return it;
-       };
-
-       // `Object.setPrototypeOf` method
-       // https://tc39.github.io/ecma262/#sec-object.setprototypeof
-       // Works with __proto__ only. Old v8 can't work with null proto objects.
-       /* eslint-disable no-proto */
-       var objectSetPrototypeOf = Object.setPrototypeOf || ('__proto__' in {} ? function () {
-         var CORRECT_SETTER = false;
-         var test = {};
-         var setter;
-         try {
-           setter = Object.getOwnPropertyDescriptor(Object.prototype, '__proto__').set;
-           setter.call(test, []);
-           CORRECT_SETTER = test instanceof Array;
-         } catch (error) { /* empty */ }
-         return function setPrototypeOf(O, proto) {
-           anObject(O);
-           aPossiblePrototype(proto);
-           if (CORRECT_SETTER) setter.call(O, proto);
-           else O.__proto__ = proto;
-           return O;
-         };
-       }() : undefined);
-
-       var IteratorPrototype$2 = iteratorsCore.IteratorPrototype;
-       var BUGGY_SAFARI_ITERATORS$1 = iteratorsCore.BUGGY_SAFARI_ITERATORS;
-       var ITERATOR$1 = wellKnownSymbol('iterator');
-       var KEYS = 'keys';
-       var VALUES = 'values';
-       var ENTRIES = 'entries';
-
-       var returnThis$2 = function () { return this; };
-
-       var defineIterator = function (Iterable, NAME, IteratorConstructor, next, DEFAULT, IS_SET, FORCED) {
-         createIteratorConstructor(IteratorConstructor, NAME, next);
-
-         var getIterationMethod = function (KIND) {
-           if (KIND === DEFAULT && defaultIterator) return defaultIterator;
-           if (!BUGGY_SAFARI_ITERATORS$1 && KIND in IterablePrototype) return IterablePrototype[KIND];
-           switch (KIND) {
-             case KEYS: return function keys() { return new IteratorConstructor(this, KIND); };
-             case VALUES: return function values() { return new IteratorConstructor(this, KIND); };
-             case ENTRIES: return function entries() { return new IteratorConstructor(this, KIND); };
-           } return function () { return new IteratorConstructor(this); };
-         };
-
-         var TO_STRING_TAG = NAME + ' Iterator';
-         var INCORRECT_VALUES_NAME = false;
-         var IterablePrototype = Iterable.prototype;
-         var nativeIterator = IterablePrototype[ITERATOR$1]
-           || IterablePrototype['@@iterator']
-           || DEFAULT && IterablePrototype[DEFAULT];
-         var defaultIterator = !BUGGY_SAFARI_ITERATORS$1 && nativeIterator || getIterationMethod(DEFAULT);
-         var anyNativeIterator = NAME == 'Array' ? IterablePrototype.entries || nativeIterator : nativeIterator;
-         var CurrentIteratorPrototype, methods, KEY;
-
-         // fix native
-         if (anyNativeIterator) {
-           CurrentIteratorPrototype = objectGetPrototypeOf(anyNativeIterator.call(new Iterable()));
-           if (IteratorPrototype$2 !== Object.prototype && CurrentIteratorPrototype.next) {
-             if ( objectGetPrototypeOf(CurrentIteratorPrototype) !== IteratorPrototype$2) {
-               if (objectSetPrototypeOf) {
-                 objectSetPrototypeOf(CurrentIteratorPrototype, IteratorPrototype$2);
-               } else if (typeof CurrentIteratorPrototype[ITERATOR$1] != 'function') {
-                 createNonEnumerableProperty(CurrentIteratorPrototype, ITERATOR$1, returnThis$2);
-               }
-             }
-             // Set @@toStringTag to native iterators
-             setToStringTag(CurrentIteratorPrototype, TO_STRING_TAG, true);
-           }
-         }
-
-         // fix Array#{values, @@iterator}.name in V8 / FF
-         if (DEFAULT == VALUES && nativeIterator && nativeIterator.name !== VALUES) {
-           INCORRECT_VALUES_NAME = true;
-           defaultIterator = function values() { return nativeIterator.call(this); };
-         }
-
-         // define iterator
-         if ( IterablePrototype[ITERATOR$1] !== defaultIterator) {
-           createNonEnumerableProperty(IterablePrototype, ITERATOR$1, defaultIterator);
-         }
-         iterators[NAME] = defaultIterator;
-
-         // export additional methods
-         if (DEFAULT) {
-           methods = {
-             values: getIterationMethod(VALUES),
-             keys: IS_SET ? defaultIterator : getIterationMethod(KEYS),
-             entries: getIterationMethod(ENTRIES)
-           };
-           if (FORCED) for (KEY in methods) {
-             if (BUGGY_SAFARI_ITERATORS$1 || INCORRECT_VALUES_NAME || !(KEY in IterablePrototype)) {
-               redefine(IterablePrototype, KEY, methods[KEY]);
-             }
-           } else _export({ target: NAME, proto: true, forced: BUGGY_SAFARI_ITERATORS$1 || INCORRECT_VALUES_NAME }, methods);
-         }
-
-         return methods;
-       };
-
-       var ARRAY_ITERATOR = 'Array Iterator';
-       var setInternalState$1 = internalState.set;
-       var getInternalState$1 = internalState.getterFor(ARRAY_ITERATOR);
-
-       // `Array.prototype.entries` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.entries
-       // `Array.prototype.keys` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.keys
-       // `Array.prototype.values` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.values
-       // `Array.prototype[@@iterator]` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@iterator
-       // `CreateArrayIterator` internal method
-       // https://tc39.github.io/ecma262/#sec-createarrayiterator
-       var es_array_iterator = defineIterator(Array, 'Array', function (iterated, kind) {
-         setInternalState$1(this, {
-           type: ARRAY_ITERATOR,
-           target: toIndexedObject(iterated), // target
-           index: 0,                          // next index
-           kind: kind                         // kind
-         });
-       // `%ArrayIteratorPrototype%.next` method
-       // https://tc39.github.io/ecma262/#sec-%arrayiteratorprototype%.next
-       }, function () {
-         var state = getInternalState$1(this);
-         var target = state.target;
-         var kind = state.kind;
-         var index = state.index++;
-         if (!target || index >= target.length) {
-           state.target = undefined;
-           return { value: undefined, done: true };
-         }
-         if (kind == 'keys') return { value: index, done: false };
-         if (kind == 'values') return { value: target[index], done: false };
-         return { value: [index, target[index]], done: false };
-       }, 'values');
-
-       // argumentsList[@@iterator] is %ArrayProto_values%
-       // https://tc39.github.io/ecma262/#sec-createunmappedargumentsobject
-       // https://tc39.github.io/ecma262/#sec-createmappedargumentsobject
-       iterators.Arguments = iterators.Array;
-
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables('keys');
-       addToUnscopables('values');
-       addToUnscopables('entries');
-
-       var nativeJoin = [].join;
-
-       var ES3_STRINGS = indexedObject != Object;
-       var STRICT_METHOD$2 = arrayMethodIsStrict('join', ',');
-
-       // `Array.prototype.join` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.join
-       _export({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$2 }, {
-         join: function join(separator) {
-           return nativeJoin.call(toIndexedObject(this), separator === undefined ? ',' : separator);
-         }
-       });
-
-       var engineUserAgent = getBuiltIn('navigator', 'userAgent') || '';
-
-       var process$1 = global_1.process;
-       var versions = process$1 && process$1.versions;
-       var v8 = versions && versions.v8;
-       var match, version;
-
-       if (v8) {
-         match = v8.split('.');
-         version = match[0] + match[1];
-       } else if (engineUserAgent) {
-         match = engineUserAgent.match(/Edge\/(\d+)/);
-         if (!match || match[1] >= 74) {
-           match = engineUserAgent.match(/Chrome\/(\d+)/);
-           if (match) version = match[1];
-         }
-       }
-
-       var engineV8Version = version && +version;
-
-       var SPECIES$1 = wellKnownSymbol('species');
-
-       var arrayMethodHasSpeciesSupport = function (METHOD_NAME) {
-         // We can't use this feature detection in V8 since it causes
-         // deoptimization and serious performance degradation
-         // https://github.com/zloirock/core-js/issues/677
-         return engineV8Version >= 51 || !fails(function () {
-           var array = [];
-           var constructor = array.constructor = {};
-           constructor[SPECIES$1] = function () {
-             return { foo: 1 };
-           };
-           return array[METHOD_NAME](Boolean).foo !== 1;
-         });
-       };
-
-       var $map = arrayIteration.map;
-
-
-
-       var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('map');
-       // FF49- issue
-       var USES_TO_LENGTH$2 = arrayMethodUsesToLength('map');
-
-       // `Array.prototype.map` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.map
-       // with adding support of @@species
-       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT || !USES_TO_LENGTH$2 }, {
-         map: function map(callbackfn /* , thisArg */) {
-           return $map(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-         }
-       });
-
-       var createProperty = function (object, key, value) {
-         var propertyKey = toPrimitive(key);
-         if (propertyKey in object) objectDefineProperty.f(object, propertyKey, createPropertyDescriptor(0, value));
-         else object[propertyKey] = value;
-       };
-
-       var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport('slice');
-       var USES_TO_LENGTH$3 = arrayMethodUsesToLength('slice', { ACCESSORS: true, 0: 0, 1: 2 });
-
-       var SPECIES$2 = wellKnownSymbol('species');
-       var nativeSlice = [].slice;
-       var max$1 = Math.max;
-
-       // `Array.prototype.slice` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.slice
-       // fallback for not array-like ES3 strings and DOM objects
-       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 || !USES_TO_LENGTH$3 }, {
-         slice: function slice(start, end) {
-           var O = toIndexedObject(this);
-           var length = toLength(O.length);
-           var k = toAbsoluteIndex(start, length);
-           var fin = toAbsoluteIndex(end === undefined ? length : end, length);
-           // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible
-           var Constructor, result, n;
-           if (isArray(O)) {
-             Constructor = O.constructor;
-             // cross-realm fallback
-             if (typeof Constructor == 'function' && (Constructor === Array || isArray(Constructor.prototype))) {
-               Constructor = undefined;
-             } else if (isObject(Constructor)) {
-               Constructor = Constructor[SPECIES$2];
-               if (Constructor === null) Constructor = undefined;
-             }
-             if (Constructor === Array || Constructor === undefined) {
-               return nativeSlice.call(O, k, fin);
-             }
-           }
-           result = new (Constructor === undefined ? Array : Constructor)(max$1(fin - k, 0));
-           for (n = 0; k < fin; k++, n++) if (k in O) createProperty(result, n, O[k]);
-           result.length = n;
-           return result;
-         }
-       });
-
-       var arrayBufferNative = typeof ArrayBuffer !== 'undefined' && typeof DataView !== 'undefined';
-
-       var redefineAll = function (target, src, options) {
-         for (var key in src) redefine(target, key, src[key], options);
-         return target;
-       };
-
-       var anInstance = function (it, Constructor, name) {
-         if (!(it instanceof Constructor)) {
-           throw TypeError('Incorrect ' + (name ? name + ' ' : '') + 'invocation');
-         } return it;
-       };
-
-       // `ToIndex` abstract operation
-       // https://tc39.github.io/ecma262/#sec-toindex
-       var toIndex = function (it) {
-         if (it === undefined) return 0;
-         var number = toInteger(it);
-         var length = toLength(number);
-         if (number !== length) throw RangeError('Wrong length or index');
-         return length;
-       };
-
-       // IEEE754 conversions based on https://github.com/feross/ieee754
-       // eslint-disable-next-line no-shadow-restricted-names
-       var Infinity$1 = 1 / 0;
-       var abs = Math.abs;
-       var pow = Math.pow;
-       var floor$1 = Math.floor;
-       var log = Math.log;
-       var LN2 = Math.LN2;
-
-       var pack = function (number, mantissaLength, bytes) {
-         var buffer = new Array(bytes);
-         var exponentLength = bytes * 8 - mantissaLength - 1;
-         var eMax = (1 << exponentLength) - 1;
-         var eBias = eMax >> 1;
-         var rt = mantissaLength === 23 ? pow(2, -24) - pow(2, -77) : 0;
-         var sign = number < 0 || number === 0 && 1 / number < 0 ? 1 : 0;
-         var index = 0;
-         var exponent, mantissa, c;
-         number = abs(number);
-         // eslint-disable-next-line no-self-compare
-         if (number != number || number === Infinity$1) {
-           // eslint-disable-next-line no-self-compare
-           mantissa = number != number ? 1 : 0;
-           exponent = eMax;
-         } else {
-           exponent = floor$1(log(number) / LN2);
-           if (number * (c = pow(2, -exponent)) < 1) {
-             exponent--;
-             c *= 2;
-           }
-           if (exponent + eBias >= 1) {
-             number += rt / c;
-           } else {
-             number += rt * pow(2, 1 - eBias);
-           }
-           if (number * c >= 2) {
-             exponent++;
-             c /= 2;
-           }
-           if (exponent + eBias >= eMax) {
-             mantissa = 0;
-             exponent = eMax;
-           } else if (exponent + eBias >= 1) {
-             mantissa = (number * c - 1) * pow(2, mantissaLength);
-             exponent = exponent + eBias;
-           } else {
-             mantissa = number * pow(2, eBias - 1) * pow(2, mantissaLength);
-             exponent = 0;
-           }
-         }
-         for (; mantissaLength >= 8; buffer[index++] = mantissa & 255, mantissa /= 256, mantissaLength -= 8);
-         exponent = exponent << mantissaLength | mantissa;
-         exponentLength += mantissaLength;
-         for (; exponentLength > 0; buffer[index++] = exponent & 255, exponent /= 256, exponentLength -= 8);
-         buffer[--index] |= sign * 128;
-         return buffer;
-       };
-
-       var unpack = function (buffer, mantissaLength) {
-         var bytes = buffer.length;
-         var exponentLength = bytes * 8 - mantissaLength - 1;
-         var eMax = (1 << exponentLength) - 1;
-         var eBias = eMax >> 1;
-         var nBits = exponentLength - 7;
-         var index = bytes - 1;
-         var sign = buffer[index--];
-         var exponent = sign & 127;
-         var mantissa;
-         sign >>= 7;
-         for (; nBits > 0; exponent = exponent * 256 + buffer[index], index--, nBits -= 8);
-         mantissa = exponent & (1 << -nBits) - 1;
-         exponent >>= -nBits;
-         nBits += mantissaLength;
-         for (; nBits > 0; mantissa = mantissa * 256 + buffer[index], index--, nBits -= 8);
-         if (exponent === 0) {
-           exponent = 1 - eBias;
-         } else if (exponent === eMax) {
-           return mantissa ? NaN : sign ? -Infinity$1 : Infinity$1;
-         } else {
-           mantissa = mantissa + pow(2, mantissaLength);
-           exponent = exponent - eBias;
-         } return (sign ? -1 : 1) * mantissa * pow(2, exponent - mantissaLength);
-       };
-
-       var ieee754 = {
-         pack: pack,
-         unpack: unpack
-       };
-
-       // `Array.prototype.fill` method implementation
-       // https://tc39.github.io/ecma262/#sec-array.prototype.fill
-       var arrayFill = function fill(value /* , start = 0, end = @length */) {
-         var O = toObject(this);
-         var length = toLength(O.length);
-         var argumentsLength = arguments.length;
-         var index = toAbsoluteIndex(argumentsLength > 1 ? arguments[1] : undefined, length);
-         var end = argumentsLength > 2 ? arguments[2] : undefined;
-         var endPos = end === undefined ? length : toAbsoluteIndex(end, length);
-         while (endPos > index) O[index++] = value;
-         return O;
-       };
-
-       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
-       var defineProperty$4 = objectDefineProperty.f;
-
-
-
-
-       var getInternalState$2 = internalState.get;
-       var setInternalState$2 = internalState.set;
-       var ARRAY_BUFFER = 'ArrayBuffer';
-       var DATA_VIEW = 'DataView';
-       var PROTOTYPE$2 = 'prototype';
-       var WRONG_LENGTH = 'Wrong length';
-       var WRONG_INDEX = 'Wrong index';
-       var NativeArrayBuffer = global_1[ARRAY_BUFFER];
-       var $ArrayBuffer = NativeArrayBuffer;
-       var $DataView = global_1[DATA_VIEW];
-       var $DataViewPrototype = $DataView && $DataView[PROTOTYPE$2];
-       var ObjectPrototype$2 = Object.prototype;
-       var RangeError$1 = global_1.RangeError;
-
-       var packIEEE754 = ieee754.pack;
-       var unpackIEEE754 = ieee754.unpack;
-
-       var packInt8 = function (number) {
-         return [number & 0xFF];
-       };
-
-       var packInt16 = function (number) {
-         return [number & 0xFF, number >> 8 & 0xFF];
-       };
-
-       var packInt32 = function (number) {
-         return [number & 0xFF, number >> 8 & 0xFF, number >> 16 & 0xFF, number >> 24 & 0xFF];
-       };
-
-       var unpackInt32 = function (buffer) {
-         return buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
-       };
-
-       var packFloat32 = function (number) {
-         return packIEEE754(number, 23, 4);
-       };
-
-       var packFloat64 = function (number) {
-         return packIEEE754(number, 52, 8);
-       };
-
-       var addGetter = function (Constructor, key) {
-         defineProperty$4(Constructor[PROTOTYPE$2], key, { get: function () { return getInternalState$2(this)[key]; } });
-       };
-
-       var get$1 = function (view, count, index, isLittleEndian) {
-         var intIndex = toIndex(index);
-         var store = getInternalState$2(view);
-         if (intIndex + count > store.byteLength) throw RangeError$1(WRONG_INDEX);
-         var bytes = getInternalState$2(store.buffer).bytes;
-         var start = intIndex + store.byteOffset;
-         var pack = bytes.slice(start, start + count);
-         return isLittleEndian ? pack : pack.reverse();
-       };
-
-       var set$1 = function (view, count, index, conversion, value, isLittleEndian) {
-         var intIndex = toIndex(index);
-         var store = getInternalState$2(view);
-         if (intIndex + count > store.byteLength) throw RangeError$1(WRONG_INDEX);
-         var bytes = getInternalState$2(store.buffer).bytes;
-         var start = intIndex + store.byteOffset;
-         var pack = conversion(+value);
-         for (var i = 0; i < count; i++) bytes[start + i] = pack[isLittleEndian ? i : count - i - 1];
-       };
-
-       if (!arrayBufferNative) {
-         $ArrayBuffer = function ArrayBuffer(length) {
-           anInstance(this, $ArrayBuffer, ARRAY_BUFFER);
-           var byteLength = toIndex(length);
-           setInternalState$2(this, {
-             bytes: arrayFill.call(new Array(byteLength), 0),
-             byteLength: byteLength
-           });
-           if (!descriptors) this.byteLength = byteLength;
-         };
-
-         $DataView = function DataView(buffer, byteOffset, byteLength) {
-           anInstance(this, $DataView, DATA_VIEW);
-           anInstance(buffer, $ArrayBuffer, DATA_VIEW);
-           var bufferLength = getInternalState$2(buffer).byteLength;
-           var offset = toInteger(byteOffset);
-           if (offset < 0 || offset > bufferLength) throw RangeError$1('Wrong offset');
-           byteLength = byteLength === undefined ? bufferLength - offset : toLength(byteLength);
-           if (offset + byteLength > bufferLength) throw RangeError$1(WRONG_LENGTH);
-           setInternalState$2(this, {
-             buffer: buffer,
-             byteLength: byteLength,
-             byteOffset: offset
-           });
-           if (!descriptors) {
-             this.buffer = buffer;
-             this.byteLength = byteLength;
-             this.byteOffset = offset;
-           }
-         };
-
-         if (descriptors) {
-           addGetter($ArrayBuffer, 'byteLength');
-           addGetter($DataView, 'buffer');
-           addGetter($DataView, 'byteLength');
-           addGetter($DataView, 'byteOffset');
-         }
-
-         redefineAll($DataView[PROTOTYPE$2], {
+         redefineAll$3(DataViewPrototype$1, {
            getInt8: function getInt8(byteOffset) {
-             return get$1(this, 1, byteOffset)[0] << 24 >> 24;
+             return get$4(this, 1, byteOffset)[0] << 24 >> 24;
            },
            getUint8: function getUint8(byteOffset) {
-             return get$1(this, 1, byteOffset)[0];
+             return get$4(this, 1, byteOffset)[0];
            },
            getInt16: function getInt16(byteOffset /* , littleEndian */) {
-             var bytes = get$1(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+             var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
              return (bytes[1] << 8 | bytes[0]) << 16 >> 16;
            },
            getUint16: function getUint16(byteOffset /* , littleEndian */) {
-             var bytes = get$1(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
+             var bytes = get$4(this, 2, byteOffset, arguments.length > 1 ? arguments[1] : undefined);
              return bytes[1] << 8 | bytes[0];
            },
            getInt32: function getInt32(byteOffset /* , littleEndian */) {
-             return unpackInt32(get$1(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
+             return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined));
            },
            getUint32: function getUint32(byteOffset /* , littleEndian */) {
-             return unpackInt32(get$1(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
+             return unpackInt32(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined)) >>> 0;
            },
            getFloat32: function getFloat32(byteOffset /* , littleEndian */) {
-             return unpackIEEE754(get$1(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
+             return unpackIEEE754(get$4(this, 4, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 23);
            },
            getFloat64: function getFloat64(byteOffset /* , littleEndian */) {
-             return unpackIEEE754(get$1(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
+             return unpackIEEE754(get$4(this, 8, byteOffset, arguments.length > 1 ? arguments[1] : undefined), 52);
            },
            setInt8: function setInt8(byteOffset, value) {
-             set$1(this, 1, byteOffset, packInt8, value);
+             set$3(this, 1, byteOffset, packInt8, value);
            },
            setUint8: function setUint8(byteOffset, value) {
-             set$1(this, 1, byteOffset, packInt8, value);
+             set$3(this, 1, byteOffset, packInt8, value);
            },
            setInt16: function setInt16(byteOffset, value /* , littleEndian */) {
-             set$1(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+             set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setUint16: function setUint16(byteOffset, value /* , littleEndian */) {
-             set$1(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
+             set$3(this, 2, byteOffset, packInt16, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setInt32: function setInt32(byteOffset, value /* , littleEndian */) {
-             set$1(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+             set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setUint32: function setUint32(byteOffset, value /* , littleEndian */) {
-             set$1(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
+             set$3(this, 4, byteOffset, packInt32, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setFloat32: function setFloat32(byteOffset, value /* , littleEndian */) {
-             set$1(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
+             set$3(this, 4, byteOffset, packFloat32, value, arguments.length > 2 ? arguments[2] : undefined);
            },
            setFloat64: function setFloat64(byteOffset, value /* , littleEndian */) {
-             set$1(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
+             set$3(this, 8, byteOffset, packFloat64, value, arguments.length > 2 ? arguments[2] : undefined);
            }
          });
        } else {
-         if (!fails(function () {
-           NativeArrayBuffer(1);
-         }) || !fails(function () {
-           new NativeArrayBuffer(-1); // eslint-disable-line no-new
-         }) || fails(function () {
-           new NativeArrayBuffer(); // eslint-disable-line no-new
-           new NativeArrayBuffer(1.5); // eslint-disable-line no-new
-           new NativeArrayBuffer(NaN); // eslint-disable-line no-new
-           return NativeArrayBuffer.name != ARRAY_BUFFER;
+         var INCORRECT_ARRAY_BUFFER_NAME = PROPER_FUNCTION_NAME$3 && NativeArrayBuffer$1.name !== ARRAY_BUFFER$1;
+         /* eslint-disable no-new -- required for testing */
+         if (!fails$I(function () {
+           NativeArrayBuffer$1(1);
+         }) || !fails$I(function () {
+           new NativeArrayBuffer$1(-1);
+         }) || fails$I(function () {
+           new NativeArrayBuffer$1();
+           new NativeArrayBuffer$1(1.5);
+           new NativeArrayBuffer$1(NaN);
+           return INCORRECT_ARRAY_BUFFER_NAME && !CONFIGURABLE_FUNCTION_NAME;
          })) {
+         /* eslint-enable no-new -- required for testing */
            $ArrayBuffer = function ArrayBuffer(length) {
-             anInstance(this, $ArrayBuffer);
-             return new NativeArrayBuffer(toIndex(length));
+             anInstance$6(this, ArrayBufferPrototype$1);
+             return new NativeArrayBuffer$1(toIndex$1(length));
            };
-           var ArrayBufferPrototype = $ArrayBuffer[PROTOTYPE$2] = NativeArrayBuffer[PROTOTYPE$2];
-           for (var keys$1 = getOwnPropertyNames(NativeArrayBuffer), j = 0, key; keys$1.length > j;) {
-             if (!((key = keys$1[j++]) in $ArrayBuffer)) {
-               createNonEnumerableProperty($ArrayBuffer, key, NativeArrayBuffer[key]);
+
+           $ArrayBuffer[PROTOTYPE] = ArrayBufferPrototype$1;
+
+           for (var keys$2 = getOwnPropertyNames$4(NativeArrayBuffer$1), j$2 = 0, key$1; keys$2.length > j$2;) {
+             if (!((key$1 = keys$2[j$2++]) in $ArrayBuffer)) {
+               createNonEnumerableProperty$5($ArrayBuffer, key$1, NativeArrayBuffer$1[key$1]);
              }
            }
-           ArrayBufferPrototype.constructor = $ArrayBuffer;
+
+           ArrayBufferPrototype$1.constructor = $ArrayBuffer;
+         } else if (INCORRECT_ARRAY_BUFFER_NAME && CONFIGURABLE_FUNCTION_NAME) {
+           createNonEnumerableProperty$5(NativeArrayBuffer$1, 'name', ARRAY_BUFFER$1);
          }
 
          // WebKit bug - the same parent prototype for typed arrays and data view
-         if (objectSetPrototypeOf && objectGetPrototypeOf($DataViewPrototype) !== ObjectPrototype$2) {
-           objectSetPrototypeOf($DataViewPrototype, ObjectPrototype$2);
+         if (setPrototypeOf$5 && getPrototypeOf$2(DataViewPrototype$1) !== ObjectPrototype$2) {
+           setPrototypeOf$5(DataViewPrototype$1, ObjectPrototype$2);
          }
 
          // iOS Safari 7.x bug
          var testView = new $DataView(new $ArrayBuffer(2));
-         var nativeSetInt8 = $DataViewPrototype.setInt8;
+         var $setInt8 = uncurryThis$E(DataViewPrototype$1.setInt8);
          testView.setInt8(0, 2147483648);
          testView.setInt8(1, 2147483649);
-         if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll($DataViewPrototype, {
+         if (testView.getInt8(0) || !testView.getInt8(1)) redefineAll$3(DataViewPrototype$1, {
            setInt8: function setInt8(byteOffset, value) {
-             nativeSetInt8.call(this, byteOffset, value << 24 >> 24);
+             $setInt8(this, byteOffset, value << 24 >> 24);
            },
            setUint8: function setUint8(byteOffset, value) {
-             nativeSetInt8.call(this, byteOffset, value << 24 >> 24);
+             $setInt8(this, byteOffset, value << 24 >> 24);
            }
          }, { unsafe: true });
        }
 
-       setToStringTag($ArrayBuffer, ARRAY_BUFFER);
-       setToStringTag($DataView, DATA_VIEW);
+       setToStringTag$6($ArrayBuffer, ARRAY_BUFFER$1);
+       setToStringTag$6($DataView, DATA_VIEW);
 
        var arrayBuffer = {
          ArrayBuffer: $ArrayBuffer,
          DataView: $DataView
        };
 
-       var SPECIES$3 = wellKnownSymbol('species');
+       var global$O = global$1m;
+       var isConstructor$2 = isConstructor$4;
+       var tryToString$3 = tryToString$5;
 
-       var setSpecies = function (CONSTRUCTOR_NAME) {
-         var Constructor = getBuiltIn(CONSTRUCTOR_NAME);
-         var defineProperty = objectDefineProperty.f;
+       var TypeError$e = global$O.TypeError;
 
-         if (descriptors && Constructor && !Constructor[SPECIES$3]) {
-           defineProperty(Constructor, SPECIES$3, {
-             configurable: true,
-             get: function () { return this; }
-           });
-         }
+       // `Assert: IsConstructor(argument) is true`
+       var aConstructor$3 = function (argument) {
+         if (isConstructor$2(argument)) return argument;
+         throw TypeError$e(tryToString$3(argument) + ' is not a constructor');
        };
 
-       var ARRAY_BUFFER$1 = 'ArrayBuffer';
-       var ArrayBuffer$1 = arrayBuffer[ARRAY_BUFFER$1];
-       var NativeArrayBuffer$1 = global_1[ARRAY_BUFFER$1];
-
-       // `ArrayBuffer` constructor
-       // https://tc39.github.io/ecma262/#sec-arraybuffer-constructor
-       _export({ global: true, forced: NativeArrayBuffer$1 !== ArrayBuffer$1 }, {
-         ArrayBuffer: ArrayBuffer$1
-       });
-
-       setSpecies(ARRAY_BUFFER$1);
+       var anObject$g = anObject$n;
+       var aConstructor$2 = aConstructor$3;
+       var wellKnownSymbol$h = wellKnownSymbol$t;
 
-       var TO_STRING_TAG$1 = wellKnownSymbol('toStringTag');
-       var test = {};
-
-       test[TO_STRING_TAG$1] = 'z';
-
-       var toStringTagSupport = String(test) === '[object z]';
-
-       var TO_STRING_TAG$2 = wellKnownSymbol('toStringTag');
-       // ES3 wrong here
-       var CORRECT_ARGUMENTS = classofRaw(function () { return arguments; }()) == 'Arguments';
-
-       // fallback for IE11 Script Access Denied error
-       var tryGet = function (it, key) {
-         try {
-           return it[key];
-         } catch (error) { /* empty */ }
-       };
+       var SPECIES$5 = wellKnownSymbol$h('species');
 
-       // getting tag from ES6+ `Object.prototype.toString`
-       var classof = toStringTagSupport ? classofRaw : function (it) {
-         var O, tag, result;
-         return it === undefined ? 'Undefined' : it === null ? 'Null'
-           // @@toStringTag case
-           : typeof (tag = tryGet(O = Object(it), TO_STRING_TAG$2)) == 'string' ? tag
-           // builtinTag case
-           : CORRECT_ARGUMENTS ? classofRaw(O)
-           // ES3 arguments fallback
-           : (result = classofRaw(O)) == 'Object' && typeof O.callee == 'function' ? 'Arguments' : result;
+       // `SpeciesConstructor` abstract operation
+       // https://tc39.es/ecma262/#sec-speciesconstructor
+       var speciesConstructor$5 = function (O, defaultConstructor) {
+         var C = anObject$g(O).constructor;
+         var S;
+         return C === undefined || (S = anObject$g(C)[SPECIES$5]) == undefined ? defaultConstructor : aConstructor$2(S);
        };
 
-       var defineProperty$5 = objectDefineProperty.f;
-
+       var $$19 = _export;
+       var uncurryThis$D = functionUncurryThis;
+       var fails$H = fails$S;
+       var ArrayBufferModule$2 = arrayBuffer;
+       var anObject$f = anObject$n;
+       var toAbsoluteIndex$5 = toAbsoluteIndex$8;
+       var toLength$8 = toLength$c;
+       var speciesConstructor$4 = speciesConstructor$5;
+
+       var ArrayBuffer$4 = ArrayBufferModule$2.ArrayBuffer;
+       var DataView$2 = ArrayBufferModule$2.DataView;
+       var DataViewPrototype = DataView$2.prototype;
+       var un$ArrayBufferSlice = uncurryThis$D(ArrayBuffer$4.prototype.slice);
+       var getUint8 = uncurryThis$D(DataViewPrototype.getUint8);
+       var setUint8 = uncurryThis$D(DataViewPrototype.setUint8);
+
+       var INCORRECT_SLICE = fails$H(function () {
+         return !new ArrayBuffer$4(2).slice(1, undefined).byteLength;
+       });
 
+       // `ArrayBuffer.prototype.slice` method
+       // https://tc39.es/ecma262/#sec-arraybuffer.prototype.slice
+       $$19({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
+         slice: function slice(start, end) {
+           if (un$ArrayBufferSlice && end === undefined) {
+             return un$ArrayBufferSlice(anObject$f(this), start); // FF fix
+           }
+           var length = anObject$f(this).byteLength;
+           var first = toAbsoluteIndex$5(start, length);
+           var fin = toAbsoluteIndex$5(end === undefined ? length : end, length);
+           var result = new (speciesConstructor$4(this, ArrayBuffer$4))(toLength$8(fin - first));
+           var viewSource = new DataView$2(this);
+           var viewTarget = new DataView$2(result);
+           var index = 0;
+           while (first < fin) {
+             setUint8(viewTarget, index++, getUint8(viewSource, first++));
+           } return result;
+         }
+       });
 
+       var $$18 = _export;
+       var ArrayBufferModule$1 = arrayBuffer;
+       var NATIVE_ARRAY_BUFFER$1 = arrayBufferNative;
 
+       // `DataView` constructor
+       // https://tc39.es/ecma262/#sec-dataview-constructor
+       $$18({ global: true, forced: !NATIVE_ARRAY_BUFFER$1 }, {
+         DataView: ArrayBufferModule$1.DataView
+       });
 
-       var Int8Array$1 = global_1.Int8Array;
-       var Int8ArrayPrototype = Int8Array$1 && Int8Array$1.prototype;
-       var Uint8ClampedArray = global_1.Uint8ClampedArray;
+       var NATIVE_ARRAY_BUFFER = arrayBufferNative;
+       var DESCRIPTORS$e = descriptors;
+       var global$N = global$1m;
+       var isCallable$9 = isCallable$r;
+       var isObject$k = isObject$s;
+       var hasOwn$9 = hasOwnProperty_1;
+       var classof$7 = classof$d;
+       var tryToString$2 = tryToString$5;
+       var createNonEnumerableProperty$4 = createNonEnumerableProperty$b;
+       var redefine$9 = redefine$h.exports;
+       var defineProperty$6 = objectDefineProperty.f;
+       var isPrototypeOf$5 = objectIsPrototypeOf;
+       var getPrototypeOf$1 = objectGetPrototypeOf;
+       var setPrototypeOf$4 = objectSetPrototypeOf;
+       var wellKnownSymbol$g = wellKnownSymbol$t;
+       var uid$1 = uid$5;
+
+       var Int8Array$3 = global$N.Int8Array;
+       var Int8ArrayPrototype = Int8Array$3 && Int8Array$3.prototype;
+       var Uint8ClampedArray = global$N.Uint8ClampedArray;
        var Uint8ClampedArrayPrototype = Uint8ClampedArray && Uint8ClampedArray.prototype;
-       var TypedArray = Int8Array$1 && objectGetPrototypeOf(Int8Array$1);
-       var TypedArrayPrototype = Int8ArrayPrototype && objectGetPrototypeOf(Int8ArrayPrototype);
-       var ObjectPrototype$3 = Object.prototype;
-       var isPrototypeOf = ObjectPrototype$3.isPrototypeOf;
+       var TypedArray$1 = Int8Array$3 && getPrototypeOf$1(Int8Array$3);
+       var TypedArrayPrototype$1 = Int8ArrayPrototype && getPrototypeOf$1(Int8ArrayPrototype);
+       var ObjectPrototype$1 = Object.prototype;
+       var TypeError$d = global$N.TypeError;
 
-       var TO_STRING_TAG$3 = wellKnownSymbol('toStringTag');
-       var TYPED_ARRAY_TAG = uid('TYPED_ARRAY_TAG');
+       var TO_STRING_TAG = wellKnownSymbol$g('toStringTag');
+       var TYPED_ARRAY_TAG$1 = uid$1('TYPED_ARRAY_TAG');
+       var TYPED_ARRAY_CONSTRUCTOR$2 = uid$1('TYPED_ARRAY_CONSTRUCTOR');
        // Fixing native typed arrays in Opera Presto crashes the browser, see #595
-       var NATIVE_ARRAY_BUFFER_VIEWS = arrayBufferNative && !!objectSetPrototypeOf && classof(global_1.opera) !== 'Opera';
+       var NATIVE_ARRAY_BUFFER_VIEWS$3 = NATIVE_ARRAY_BUFFER && !!setPrototypeOf$4 && classof$7(global$N.opera) !== 'Opera';
        var TYPED_ARRAY_TAG_REQIRED = false;
-       var NAME;
+       var NAME$1, Constructor, Prototype;
 
        var TypedArrayConstructorsList = {
          Int8Array: 1,
          Float64Array: 8
        };
 
+       var BigIntArrayConstructorsList = {
+         BigInt64Array: 8,
+         BigUint64Array: 8
+       };
+
        var isView = function isView(it) {
-         var klass = classof(it);
-         return klass === 'DataView' || has(TypedArrayConstructorsList, klass);
+         if (!isObject$k(it)) return false;
+         var klass = classof$7(it);
+         return klass === 'DataView'
+           || hasOwn$9(TypedArrayConstructorsList, klass)
+           || hasOwn$9(BigIntArrayConstructorsList, klass);
        };
 
-       var isTypedArray = function (it) {
-         return isObject(it) && has(TypedArrayConstructorsList, classof(it));
+       var isTypedArray$1 = function (it) {
+         if (!isObject$k(it)) return false;
+         var klass = classof$7(it);
+         return hasOwn$9(TypedArrayConstructorsList, klass)
+           || hasOwn$9(BigIntArrayConstructorsList, klass);
        };
 
-       var aTypedArray = function (it) {
-         if (isTypedArray(it)) return it;
-         throw TypeError('Target is not a typed array');
+       var aTypedArray$m = function (it) {
+         if (isTypedArray$1(it)) return it;
+         throw TypeError$d('Target is not a typed array');
        };
 
-       var aTypedArrayConstructor = function (C) {
-         if (objectSetPrototypeOf) {
-           if (isPrototypeOf.call(TypedArray, C)) return C;
-         } else for (var ARRAY in TypedArrayConstructorsList) if (has(TypedArrayConstructorsList, NAME)) {
-           var TypedArrayConstructor = global_1[ARRAY];
-           if (TypedArrayConstructor && (C === TypedArrayConstructor || isPrototypeOf.call(TypedArrayConstructor, C))) {
-             return C;
-           }
-         } throw TypeError('Target is not a typed array constructor');
+       var aTypedArrayConstructor$3 = function (C) {
+         if (isCallable$9(C) && (!setPrototypeOf$4 || isPrototypeOf$5(TypedArray$1, C))) return C;
+         throw TypeError$d(tryToString$2(C) + ' is not a typed array constructor');
        };
 
-       var exportTypedArrayMethod = function (KEY, property, forced) {
-         if (!descriptors) return;
+       var exportTypedArrayMethod$n = function (KEY, property, forced) {
+         if (!DESCRIPTORS$e) return;
          if (forced) for (var ARRAY in TypedArrayConstructorsList) {
-           var TypedArrayConstructor = global_1[ARRAY];
-           if (TypedArrayConstructor && has(TypedArrayConstructor.prototype, KEY)) {
+           var TypedArrayConstructor = global$N[ARRAY];
+           if (TypedArrayConstructor && hasOwn$9(TypedArrayConstructor.prototype, KEY)) try {
              delete TypedArrayConstructor.prototype[KEY];
-           }
+           } catch (error) { /* empty */ }
          }
-         if (!TypedArrayPrototype[KEY] || forced) {
-           redefine(TypedArrayPrototype, KEY, forced ? property
-             : NATIVE_ARRAY_BUFFER_VIEWS && Int8ArrayPrototype[KEY] || property);
+         if (!TypedArrayPrototype$1[KEY] || forced) {
+           redefine$9(TypedArrayPrototype$1, KEY, forced ? property
+             : NATIVE_ARRAY_BUFFER_VIEWS$3 && Int8ArrayPrototype[KEY] || property);
          }
        };
 
-       var exportTypedArrayStaticMethod = function (KEY, property, forced) {
+       var exportTypedArrayStaticMethod$1 = function (KEY, property, forced) {
          var ARRAY, TypedArrayConstructor;
-         if (!descriptors) return;
-         if (objectSetPrototypeOf) {
+         if (!DESCRIPTORS$e) return;
+         if (setPrototypeOf$4) {
            if (forced) for (ARRAY in TypedArrayConstructorsList) {
-             TypedArrayConstructor = global_1[ARRAY];
-             if (TypedArrayConstructor && has(TypedArrayConstructor, KEY)) {
+             TypedArrayConstructor = global$N[ARRAY];
+             if (TypedArrayConstructor && hasOwn$9(TypedArrayConstructor, KEY)) try {
                delete TypedArrayConstructor[KEY];
-             }
+             } catch (error) { /* empty */ }
            }
-           if (!TypedArray[KEY] || forced) {
+           if (!TypedArray$1[KEY] || forced) {
              // V8 ~ Chrome 49-50 `%TypedArray%` methods are non-writable non-configurable
              try {
-               return redefine(TypedArray, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS && Int8Array$1[KEY] || property);
+               return redefine$9(TypedArray$1, KEY, forced ? property : NATIVE_ARRAY_BUFFER_VIEWS$3 && TypedArray$1[KEY] || property);
              } catch (error) { /* empty */ }
            } else return;
          }
          for (ARRAY in TypedArrayConstructorsList) {
-           TypedArrayConstructor = global_1[ARRAY];
+           TypedArrayConstructor = global$N[ARRAY];
            if (TypedArrayConstructor && (!TypedArrayConstructor[KEY] || forced)) {
-             redefine(TypedArrayConstructor, KEY, property);
+             redefine$9(TypedArrayConstructor, KEY, property);
            }
          }
        };
 
-       for (NAME in TypedArrayConstructorsList) {
-         if (!global_1[NAME]) NATIVE_ARRAY_BUFFER_VIEWS = false;
+       for (NAME$1 in TypedArrayConstructorsList) {
+         Constructor = global$N[NAME$1];
+         Prototype = Constructor && Constructor.prototype;
+         if (Prototype) createNonEnumerableProperty$4(Prototype, TYPED_ARRAY_CONSTRUCTOR$2, Constructor);
+         else NATIVE_ARRAY_BUFFER_VIEWS$3 = false;
+       }
+
+       for (NAME$1 in BigIntArrayConstructorsList) {
+         Constructor = global$N[NAME$1];
+         Prototype = Constructor && Constructor.prototype;
+         if (Prototype) createNonEnumerableProperty$4(Prototype, TYPED_ARRAY_CONSTRUCTOR$2, Constructor);
        }
 
        // WebKit bug - typed arrays constructors prototype is Object.prototype
-       if (!NATIVE_ARRAY_BUFFER_VIEWS || typeof TypedArray != 'function' || TypedArray === Function.prototype) {
-         // eslint-disable-next-line no-shadow
-         TypedArray = function TypedArray() {
-           throw TypeError('Incorrect invocation');
+       if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || !isCallable$9(TypedArray$1) || TypedArray$1 === Function.prototype) {
+         // eslint-disable-next-line no-shadow -- safe
+         TypedArray$1 = function TypedArray() {
+           throw TypeError$d('Incorrect invocation');
          };
-         if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
-           if (global_1[NAME]) objectSetPrototypeOf(global_1[NAME], TypedArray);
+         if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+           if (global$N[NAME$1]) setPrototypeOf$4(global$N[NAME$1], TypedArray$1);
          }
        }
 
-       if (!NATIVE_ARRAY_BUFFER_VIEWS || !TypedArrayPrototype || TypedArrayPrototype === ObjectPrototype$3) {
-         TypedArrayPrototype = TypedArray.prototype;
-         if (NATIVE_ARRAY_BUFFER_VIEWS) for (NAME in TypedArrayConstructorsList) {
-           if (global_1[NAME]) objectSetPrototypeOf(global_1[NAME].prototype, TypedArrayPrototype);
+       if (!NATIVE_ARRAY_BUFFER_VIEWS$3 || !TypedArrayPrototype$1 || TypedArrayPrototype$1 === ObjectPrototype$1) {
+         TypedArrayPrototype$1 = TypedArray$1.prototype;
+         if (NATIVE_ARRAY_BUFFER_VIEWS$3) for (NAME$1 in TypedArrayConstructorsList) {
+           if (global$N[NAME$1]) setPrototypeOf$4(global$N[NAME$1].prototype, TypedArrayPrototype$1);
          }
        }
 
        // WebKit bug - one more object in Uint8ClampedArray prototype chain
-       if (NATIVE_ARRAY_BUFFER_VIEWS && objectGetPrototypeOf(Uint8ClampedArrayPrototype) !== TypedArrayPrototype) {
-         objectSetPrototypeOf(Uint8ClampedArrayPrototype, TypedArrayPrototype);
+       if (NATIVE_ARRAY_BUFFER_VIEWS$3 && getPrototypeOf$1(Uint8ClampedArrayPrototype) !== TypedArrayPrototype$1) {
+         setPrototypeOf$4(Uint8ClampedArrayPrototype, TypedArrayPrototype$1);
        }
 
-       if (descriptors && !has(TypedArrayPrototype, TO_STRING_TAG$3)) {
+       if (DESCRIPTORS$e && !hasOwn$9(TypedArrayPrototype$1, TO_STRING_TAG)) {
          TYPED_ARRAY_TAG_REQIRED = true;
-         defineProperty$5(TypedArrayPrototype, TO_STRING_TAG$3, { get: function () {
-           return isObject(this) ? this[TYPED_ARRAY_TAG] : undefined;
+         defineProperty$6(TypedArrayPrototype$1, TO_STRING_TAG, { get: function () {
+           return isObject$k(this) ? this[TYPED_ARRAY_TAG$1] : undefined;
          } });
-         for (NAME in TypedArrayConstructorsList) if (global_1[NAME]) {
-           createNonEnumerableProperty(global_1[NAME], TYPED_ARRAY_TAG, NAME);
+         for (NAME$1 in TypedArrayConstructorsList) if (global$N[NAME$1]) {
+           createNonEnumerableProperty$4(global$N[NAME$1], TYPED_ARRAY_TAG$1, NAME$1);
          }
        }
 
        var arrayBufferViewCore = {
-         NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS,
-         TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG,
-         aTypedArray: aTypedArray,
-         aTypedArrayConstructor: aTypedArrayConstructor,
-         exportTypedArrayMethod: exportTypedArrayMethod,
-         exportTypedArrayStaticMethod: exportTypedArrayStaticMethod,
+         NATIVE_ARRAY_BUFFER_VIEWS: NATIVE_ARRAY_BUFFER_VIEWS$3,
+         TYPED_ARRAY_CONSTRUCTOR: TYPED_ARRAY_CONSTRUCTOR$2,
+         TYPED_ARRAY_TAG: TYPED_ARRAY_TAG_REQIRED && TYPED_ARRAY_TAG$1,
+         aTypedArray: aTypedArray$m,
+         aTypedArrayConstructor: aTypedArrayConstructor$3,
+         exportTypedArrayMethod: exportTypedArrayMethod$n,
+         exportTypedArrayStaticMethod: exportTypedArrayStaticMethod$1,
          isView: isView,
-         isTypedArray: isTypedArray,
-         TypedArray: TypedArray,
-         TypedArrayPrototype: TypedArrayPrototype
+         isTypedArray: isTypedArray$1,
+         TypedArray: TypedArray$1,
+         TypedArrayPrototype: TypedArrayPrototype$1
        };
 
-       var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+       var $$17 = _export;
+       var ArrayBufferViewCore$o = arrayBufferViewCore;
+
+       var NATIVE_ARRAY_BUFFER_VIEWS$2 = ArrayBufferViewCore$o.NATIVE_ARRAY_BUFFER_VIEWS;
 
        // `ArrayBuffer.isView` method
-       // https://tc39.github.io/ecma262/#sec-arraybuffer.isview
-       _export({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$1 }, {
-         isView: arrayBufferViewCore.isView
+       // https://tc39.es/ecma262/#sec-arraybuffer.isview
+       $$17({ target: 'ArrayBuffer', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS$2 }, {
+         isView: ArrayBufferViewCore$o.isView
        });
 
-       var SPECIES$4 = wellKnownSymbol('species');
-
-       // `SpeciesConstructor` abstract operation
-       // https://tc39.github.io/ecma262/#sec-speciesconstructor
-       var speciesConstructor = function (O, defaultConstructor) {
-         var C = anObject(O).constructor;
-         var S;
-         return C === undefined || (S = anObject(C)[SPECIES$4]) == undefined ? defaultConstructor : aFunction$1(S);
-       };
+       var getBuiltIn$4 = getBuiltIn$b;
+       var definePropertyModule$2 = objectDefineProperty;
+       var wellKnownSymbol$f = wellKnownSymbol$t;
+       var DESCRIPTORS$d = descriptors;
 
-       var ArrayBuffer$2 = arrayBuffer.ArrayBuffer;
-       var DataView$1 = arrayBuffer.DataView;
-       var nativeArrayBufferSlice = ArrayBuffer$2.prototype.slice;
+       var SPECIES$4 = wellKnownSymbol$f('species');
 
-       var INCORRECT_SLICE = fails(function () {
-         return !new ArrayBuffer$2(2).slice(1, undefined).byteLength;
-       });
+       var setSpecies$5 = function (CONSTRUCTOR_NAME) {
+         var Constructor = getBuiltIn$4(CONSTRUCTOR_NAME);
+         var defineProperty = definePropertyModule$2.f;
 
-       // `ArrayBuffer.prototype.slice` method
-       // https://tc39.github.io/ecma262/#sec-arraybuffer.prototype.slice
-       _export({ target: 'ArrayBuffer', proto: true, unsafe: true, forced: INCORRECT_SLICE }, {
-         slice: function slice(start, end) {
-           if (nativeArrayBufferSlice !== undefined && end === undefined) {
-             return nativeArrayBufferSlice.call(anObject(this), start); // FF fix
-           }
-           var length = anObject(this).byteLength;
-           var first = toAbsoluteIndex(start, length);
-           var fin = toAbsoluteIndex(end === undefined ? length : end, length);
-           var result = new (speciesConstructor(this, ArrayBuffer$2))(toLength(fin - first));
-           var viewSource = new DataView$1(this);
-           var viewTarget = new DataView$1(result);
-           var index = 0;
-           while (first < fin) {
-             viewTarget.setUint8(index++, viewSource.getUint8(first++));
-           } return result;
+         if (DESCRIPTORS$d && Constructor && !Constructor[SPECIES$4]) {
+           defineProperty(Constructor, SPECIES$4, {
+             configurable: true,
+             get: function () { return this; }
+           });
          }
-       });
+       };
 
-       // `DataView` constructor
-       // https://tc39.github.io/ecma262/#sec-dataview-constructor
-       _export({ global: true, forced: !arrayBufferNative }, {
-         DataView: arrayBuffer.DataView
+       var $$16 = _export;
+       var global$M = global$1m;
+       var arrayBufferModule = arrayBuffer;
+       var setSpecies$4 = setSpecies$5;
+
+       var ARRAY_BUFFER = 'ArrayBuffer';
+       var ArrayBuffer$3 = arrayBufferModule[ARRAY_BUFFER];
+       var NativeArrayBuffer = global$M[ARRAY_BUFFER];
+
+       // `ArrayBuffer` constructor
+       // https://tc39.es/ecma262/#sec-arraybuffer-constructor
+       $$16({ global: true, forced: NativeArrayBuffer !== ArrayBuffer$3 }, {
+         ArrayBuffer: ArrayBuffer$3
        });
 
-       var defineProperty$6 = objectDefineProperty.f;
+       setSpecies$4(ARRAY_BUFFER);
 
-       var FunctionPrototype = Function.prototype;
-       var FunctionPrototypeToString = FunctionPrototype.toString;
-       var nameRE = /^\s*function ([^ (]*)/;
-       var NAME$1 = 'name';
+       var fails$G = fails$S;
 
-       // Function instances `.name` property
-       // https://tc39.github.io/ecma262/#sec-function-instances-name
-       if (descriptors && !(NAME$1 in FunctionPrototype)) {
-         defineProperty$6(FunctionPrototype, NAME$1, {
-           configurable: true,
-           get: function () {
-             try {
-               return FunctionPrototypeToString.call(this).match(nameRE)[1];
-             } catch (error) {
-               return '';
-             }
-           }
+       var arrayMethodIsStrict$9 = function (METHOD_NAME, argument) {
+         var method = [][METHOD_NAME];
+         return !!method && fails$G(function () {
+           // eslint-disable-next-line no-useless-call,no-throw-literal -- required for testing
+           method.call(null, argument || function () { throw 1; }, 1);
          });
-       }
+       };
 
-       // `Object.create` method
-       // https://tc39.github.io/ecma262/#sec-object.create
-       _export({ target: 'Object', stat: true, sham: !descriptors }, {
-         create: objectCreate
-       });
+       /* eslint-disable es/no-array-prototype-indexof -- required for testing */
+       var $$15 = _export;
+       var uncurryThis$C = functionUncurryThis;
+       var $IndexOf = arrayIncludes.indexOf;
+       var arrayMethodIsStrict$8 = arrayMethodIsStrict$9;
 
-       var nativeGetOwnPropertyNames$2 = objectGetOwnPropertyNamesExternal.f;
+       var un$IndexOf = uncurryThis$C([].indexOf);
 
-       var FAILS_ON_PRIMITIVES = fails(function () { return !Object.getOwnPropertyNames(1); });
+       var NEGATIVE_ZERO$1 = !!un$IndexOf && 1 / un$IndexOf([1], 1, -0) < 0;
+       var STRICT_METHOD$8 = arrayMethodIsStrict$8('indexOf');
 
-       // `Object.getOwnPropertyNames` method
-       // https://tc39.github.io/ecma262/#sec-object.getownpropertynames
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES }, {
-         getOwnPropertyNames: nativeGetOwnPropertyNames$2
+       // `Array.prototype.indexOf` method
+       // https://tc39.es/ecma262/#sec-array.prototype.indexof
+       $$15({ target: 'Array', proto: true, forced: NEGATIVE_ZERO$1 || !STRICT_METHOD$8 }, {
+         indexOf: function indexOf(searchElement /* , fromIndex = 0 */) {
+           var fromIndex = arguments.length > 1 ? arguments[1] : undefined;
+           return NEGATIVE_ZERO$1
+             // convert -0 to +0
+             ? un$IndexOf(this, searchElement, fromIndex) || 0
+             : $IndexOf(this, searchElement, fromIndex);
+         }
        });
 
-       // `Object.prototype.toString` method implementation
-       // https://tc39.github.io/ecma262/#sec-object.prototype.tostring
-       var objectToString = toStringTagSupport ? {}.toString : function toString() {
-         return '[object ' + classof(this) + ']';
-       };
+       var anObject$e = anObject$n;
 
-       // `Object.prototype.toString` method
-       // https://tc39.github.io/ecma262/#sec-object.prototype.tostring
-       if (!toStringTagSupport) {
-         redefine(Object.prototype, 'toString', objectToString, { unsafe: true });
-       }
+       // `RegExp.prototype.flags` getter implementation
+       // https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+       var regexpFlags$1 = function () {
+         var that = anObject$e(this);
+         var result = '';
+         if (that.global) result += 'g';
+         if (that.ignoreCase) result += 'i';
+         if (that.multiline) result += 'm';
+         if (that.dotAll) result += 's';
+         if (that.unicode) result += 'u';
+         if (that.sticky) result += 'y';
+         return result;
+       };
 
-       var nativePromiseConstructor = global_1.Promise;
+       var regexpStickyHelpers = {};
 
-       var ITERATOR$2 = wellKnownSymbol('iterator');
-       var ArrayPrototype$1 = Array.prototype;
+       var fails$F = fails$S;
+       var global$L = global$1m;
 
-       // check on default Array iterator
-       var isArrayIteratorMethod = function (it) {
-         return it !== undefined && (iterators.Array === it || ArrayPrototype$1[ITERATOR$2] === it);
-       };
+       // babel-minify and Closure Compiler transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError
+       var $RegExp$2 = global$L.RegExp;
 
-       var ITERATOR$3 = wellKnownSymbol('iterator');
+       regexpStickyHelpers.UNSUPPORTED_Y = fails$F(function () {
+         var re = $RegExp$2('a', 'y');
+         re.lastIndex = 2;
+         return re.exec('abcd') != null;
+       });
 
-       var getIteratorMethod = function (it) {
-         if (it != undefined) return it[ITERATOR$3]
-           || it['@@iterator']
-           || iterators[classof(it)];
-       };
+       regexpStickyHelpers.BROKEN_CARET = fails$F(function () {
+         // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
+         var re = $RegExp$2('^r', 'gy');
+         re.lastIndex = 2;
+         return re.exec('str') != null;
+       });
 
-       // call something on iterator step with safe closing on error
-       var callWithSafeIterationClosing = function (iterator, fn, value, ENTRIES) {
-         try {
-           return ENTRIES ? fn(anObject(value)[0], value[1]) : fn(value);
-         // 7.4.6 IteratorClose(iterator, completion)
-         } catch (error) {
-           var returnMethod = iterator['return'];
-           if (returnMethod !== undefined) anObject(returnMethod.call(iterator));
-           throw error;
-         }
-       };
+       var fails$E = fails$S;
+       var global$K = global$1m;
 
-       var iterate_1 = createCommonjsModule(function (module) {
-       var Result = function (stopped, result) {
-         this.stopped = stopped;
-         this.result = result;
-       };
+       // babel-minify and Closure Compiler transpiles RegExp('.', 's') -> /./s and it causes SyntaxError
+       var $RegExp$1 = global$K.RegExp;
 
-       var iterate = module.exports = function (iterable, fn, that, AS_ENTRIES, IS_ITERATOR) {
-         var boundFunction = functionBindContext(fn, that, AS_ENTRIES ? 2 : 1);
-         var iterator, iterFn, index, length, result, next, step;
+       var regexpUnsupportedDotAll = fails$E(function () {
+         var re = $RegExp$1('.', 's');
+         return !(re.dotAll && re.exec('\n') && re.flags === 's');
+       });
 
-         if (IS_ITERATOR) {
-           iterator = iterable;
-         } else {
-           iterFn = getIteratorMethod(iterable);
-           if (typeof iterFn != 'function') throw TypeError('Target is not iterable');
-           // optimisation for array iterators
-           if (isArrayIteratorMethod(iterFn)) {
-             for (index = 0, length = toLength(iterable.length); length > index; index++) {
-               result = AS_ENTRIES
-                 ? boundFunction(anObject(step = iterable[index])[0], step[1])
-                 : boundFunction(iterable[index]);
-               if (result && result instanceof Result) return result;
-             } return new Result(false);
-           }
-           iterator = iterFn.call(iterable);
-         }
+       var fails$D = fails$S;
+       var global$J = global$1m;
 
-         next = iterator.next;
-         while (!(step = next.call(iterator)).done) {
-           result = callWithSafeIterationClosing(iterator, boundFunction, step.value, AS_ENTRIES);
-           if (typeof result == 'object' && result && result instanceof Result) return result;
-         } return new Result(false);
-       };
+       // babel-minify and Closure Compiler transpiles RegExp('(?<a>b)', 'g') -> /(?<a>b)/g and it causes SyntaxError
+       var $RegExp = global$J.RegExp;
 
-       iterate.stop = function (result) {
-         return new Result(true, result);
-       };
+       var regexpUnsupportedNcg = fails$D(function () {
+         var re = $RegExp('(?<a>b)', 'g');
+         return re.exec('b').groups.a !== 'b' ||
+           'b'.replace(re, '$<a>c') !== 'bc';
        });
 
-       var ITERATOR$4 = wellKnownSymbol('iterator');
-       var SAFE_CLOSING = false;
+       /* eslint-disable regexp/no-empty-capturing-group, regexp/no-empty-group, regexp/no-lazy-ends -- testing */
+       /* eslint-disable regexp/no-useless-quantifier -- testing */
+       var call$i = functionCall;
+       var uncurryThis$B = functionUncurryThis;
+       var toString$g = toString$k;
+       var regexpFlags = regexpFlags$1;
+       var stickyHelpers$2 = regexpStickyHelpers;
+       var shared = shared$5.exports;
+       var create$8 = objectCreate;
+       var getInternalState$2 = internalState.get;
+       var UNSUPPORTED_DOT_ALL$1 = regexpUnsupportedDotAll;
+       var UNSUPPORTED_NCG$1 = regexpUnsupportedNcg;
 
-       try {
-         var called = 0;
-         var iteratorWithReturn = {
-           next: function () {
-             return { done: !!called++ };
-           },
-           'return': function () {
-             SAFE_CLOSING = true;
+       var nativeReplace = shared('native-string-replace', String.prototype.replace);
+       var nativeExec = RegExp.prototype.exec;
+       var patchedExec = nativeExec;
+       var charAt$6 = uncurryThis$B(''.charAt);
+       var indexOf = uncurryThis$B(''.indexOf);
+       var replace$7 = uncurryThis$B(''.replace);
+       var stringSlice$9 = uncurryThis$B(''.slice);
+
+       var UPDATES_LAST_INDEX_WRONG = (function () {
+         var re1 = /a/;
+         var re2 = /b*/g;
+         call$i(nativeExec, re1, 'a');
+         call$i(nativeExec, re2, 'a');
+         return re1.lastIndex !== 0 || re2.lastIndex !== 0;
+       })();
+
+       var UNSUPPORTED_Y$2 = stickyHelpers$2.UNSUPPORTED_Y || stickyHelpers$2.BROKEN_CARET;
+
+       // nonparticipating capturing group, copied from es5-shim's String#split patch.
+       var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
+
+       var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$2 || UNSUPPORTED_DOT_ALL$1 || UNSUPPORTED_NCG$1;
+
+       if (PATCH) {
+         // eslint-disable-next-line max-statements -- TODO
+         patchedExec = function exec(string) {
+           var re = this;
+           var state = getInternalState$2(re);
+           var str = toString$g(string);
+           var raw = state.raw;
+           var result, reCopy, lastIndex, match, i, object, group;
+
+           if (raw) {
+             raw.lastIndex = re.lastIndex;
+             result = call$i(patchedExec, raw, str);
+             re.lastIndex = raw.lastIndex;
+             return result;
            }
-         };
-         iteratorWithReturn[ITERATOR$4] = function () {
-           return this;
-         };
-         // eslint-disable-next-line no-throw-literal
-         Array.from(iteratorWithReturn, function () { throw 2; });
-       } catch (error) { /* empty */ }
 
-       var checkCorrectnessOfIteration = function (exec, SKIP_CLOSING) {
-         if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
-         var ITERATION_SUPPORT = false;
+           var groups = state.groups;
+           var sticky = UNSUPPORTED_Y$2 && re.sticky;
+           var flags = call$i(regexpFlags, re);
+           var source = re.source;
+           var charsAdded = 0;
+           var strCopy = str;
+
+           if (sticky) {
+             flags = replace$7(flags, 'y', '');
+             if (indexOf(flags, 'g') === -1) {
+               flags += 'g';
+             }
+
+             strCopy = stringSlice$9(str, re.lastIndex);
+             // Support anchored sticky behavior.
+             if (re.lastIndex > 0 && (!re.multiline || re.multiline && charAt$6(str, re.lastIndex - 1) !== '\n')) {
+               source = '(?: ' + source + ')';
+               strCopy = ' ' + strCopy;
+               charsAdded++;
+             }
+             // ^(? + rx + ) is needed, in combination with some str slicing, to
+             // simulate the 'y' flag.
+             reCopy = new RegExp('^(?:' + source + ')', flags);
+           }
+
+           if (NPCG_INCLUDED) {
+             reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
+           }
+           if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
+
+           match = call$i(nativeExec, sticky ? reCopy : re, strCopy);
+
+           if (sticky) {
+             if (match) {
+               match.input = stringSlice$9(match.input, charsAdded);
+               match[0] = stringSlice$9(match[0], charsAdded);
+               match.index = re.lastIndex;
+               re.lastIndex += match[0].length;
+             } else re.lastIndex = 0;
+           } else if (UPDATES_LAST_INDEX_WRONG && match) {
+             re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
+           }
+           if (NPCG_INCLUDED && match && match.length > 1) {
+             // Fix browsers whose `exec` methods don't consistently return `undefined`
+             // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
+             call$i(nativeReplace, match[0], reCopy, function () {
+               for (i = 1; i < arguments.length - 2; i++) {
+                 if (arguments[i] === undefined) match[i] = undefined;
+               }
+             });
+           }
+
+           if (match && groups) {
+             match.groups = object = create$8(null);
+             for (i = 0; i < groups.length; i++) {
+               group = groups[i];
+               object[group[0]] = match[group[1]];
+             }
+           }
+
+           return match;
+         };
+       }
+
+       var regexpExec$3 = patchedExec;
+
+       var $$14 = _export;
+       var exec$5 = regexpExec$3;
+
+       // `RegExp.prototype.exec` method
+       // https://tc39.es/ecma262/#sec-regexp.prototype.exec
+       $$14({ target: 'RegExp', proto: true, forced: /./.exec !== exec$5 }, {
+         exec: exec$5
+       });
+
+       var fails$C = fails$S;
+       var wellKnownSymbol$e = wellKnownSymbol$t;
+       var V8_VERSION$2 = engineV8Version;
+
+       var SPECIES$3 = wellKnownSymbol$e('species');
+
+       var arrayMethodHasSpeciesSupport$5 = function (METHOD_NAME) {
+         // We can't use this feature detection in V8 since it causes
+         // deoptimization and serious performance degradation
+         // https://github.com/zloirock/core-js/issues/677
+         return V8_VERSION$2 >= 51 || !fails$C(function () {
+           var array = [];
+           var constructor = array.constructor = {};
+           constructor[SPECIES$3] = function () {
+             return { foo: 1 };
+           };
+           return array[METHOD_NAME](Boolean).foo !== 1;
+         });
+       };
+
+       var $$13 = _export;
+       var $map$1 = arrayIteration.map;
+       var arrayMethodHasSpeciesSupport$4 = arrayMethodHasSpeciesSupport$5;
+
+       var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport$4('map');
+
+       // `Array.prototype.map` method
+       // https://tc39.es/ecma262/#sec-array.prototype.map
+       // with adding support of @@species
+       $$13({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 }, {
+         map: function map(callbackfn /* , thisArg */) {
+           return $map$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });
+
+       var $forEach$1 = arrayIteration.forEach;
+       var arrayMethodIsStrict$7 = arrayMethodIsStrict$9;
+
+       var STRICT_METHOD$7 = arrayMethodIsStrict$7('forEach');
+
+       // `Array.prototype.forEach` method implementation
+       // https://tc39.es/ecma262/#sec-array.prototype.foreach
+       var arrayForEach = !STRICT_METHOD$7 ? function forEach(callbackfn /* , thisArg */) {
+         return $forEach$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       // eslint-disable-next-line es/no-array-prototype-foreach -- safe
+       } : [].forEach;
+
+       var $$12 = _export;
+       var forEach$3 = arrayForEach;
+
+       // `Array.prototype.forEach` method
+       // https://tc39.es/ecma262/#sec-array.prototype.foreach
+       // eslint-disable-next-line es/no-array-prototype-foreach -- safe
+       $$12({ target: 'Array', proto: true, forced: [].forEach != forEach$3 }, {
+         forEach: forEach$3
+       });
+
+       var global$I = global$1m;
+       var DOMIterables = domIterables;
+       var DOMTokenListPrototype = domTokenListPrototype;
+       var forEach$2 = arrayForEach;
+       var createNonEnumerableProperty$3 = createNonEnumerableProperty$b;
+
+       var handlePrototype = function (CollectionPrototype) {
+         // some Chrome versions have non-configurable methods on DOMTokenList
+         if (CollectionPrototype && CollectionPrototype.forEach !== forEach$2) try {
+           createNonEnumerableProperty$3(CollectionPrototype, 'forEach', forEach$2);
+         } catch (error) {
+           CollectionPrototype.forEach = forEach$2;
+         }
+       };
+
+       for (var COLLECTION_NAME in DOMIterables) {
+         if (DOMIterables[COLLECTION_NAME]) {
+           handlePrototype(global$I[COLLECTION_NAME] && global$I[COLLECTION_NAME].prototype);
+         }
+       }
+
+       handlePrototype(DOMTokenListPrototype);
+
+       var $$11 = _export;
+       var isArray$5 = isArray$8;
+
+       // `Array.isArray` method
+       // https://tc39.es/ecma262/#sec-array.isarray
+       $$11({ target: 'Array', stat: true }, {
+         isArray: isArray$5
+       });
+
+       var $$10 = _export;
+       var fails$B = fails$S;
+       var getOwnPropertyNames$3 = objectGetOwnPropertyNamesExternal.f;
+
+       // eslint-disable-next-line es/no-object-getownpropertynames -- required for testing
+       var FAILS_ON_PRIMITIVES$5 = fails$B(function () { return !Object.getOwnPropertyNames(1); });
+
+       // `Object.getOwnPropertyNames` method
+       // https://tc39.es/ecma262/#sec-object.getownpropertynames
+       $$10({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$5 }, {
+         getOwnPropertyNames: getOwnPropertyNames$3
+       });
+
+       var global$H = global$1m;
+
+       var nativePromiseConstructor = global$H.Promise;
+
+       var wellKnownSymbol$d = wellKnownSymbol$t;
+       var Iterators$1 = iterators;
+
+       var ITERATOR$7 = wellKnownSymbol$d('iterator');
+       var ArrayPrototype = Array.prototype;
+
+       // check on default Array iterator
+       var isArrayIteratorMethod$3 = function (it) {
+         return it !== undefined && (Iterators$1.Array === it || ArrayPrototype[ITERATOR$7] === it);
+       };
+
+       var classof$6 = classof$d;
+       var getMethod$5 = getMethod$7;
+       var Iterators = iterators;
+       var wellKnownSymbol$c = wellKnownSymbol$t;
+
+       var ITERATOR$6 = wellKnownSymbol$c('iterator');
+
+       var getIteratorMethod$5 = function (it) {
+         if (it != undefined) return getMethod$5(it, ITERATOR$6)
+           || getMethod$5(it, '@@iterator')
+           || Iterators[classof$6(it)];
+       };
+
+       var global$G = global$1m;
+       var call$h = functionCall;
+       var aCallable$7 = aCallable$a;
+       var anObject$d = anObject$n;
+       var tryToString$1 = tryToString$5;
+       var getIteratorMethod$4 = getIteratorMethod$5;
+
+       var TypeError$c = global$G.TypeError;
+
+       var getIterator$4 = function (argument, usingIterator) {
+         var iteratorMethod = arguments.length < 2 ? getIteratorMethod$4(argument) : usingIterator;
+         if (aCallable$7(iteratorMethod)) return anObject$d(call$h(iteratorMethod, argument));
+         throw TypeError$c(tryToString$1(argument) + ' is not iterable');
+       };
+
+       var call$g = functionCall;
+       var anObject$c = anObject$n;
+       var getMethod$4 = getMethod$7;
+
+       var iteratorClose$2 = function (iterator, kind, value) {
+         var innerResult, innerError;
+         anObject$c(iterator);
+         try {
+           innerResult = getMethod$4(iterator, 'return');
+           if (!innerResult) {
+             if (kind === 'throw') throw value;
+             return value;
+           }
+           innerResult = call$g(innerResult, iterator);
+         } catch (error) {
+           innerError = true;
+           innerResult = error;
+         }
+         if (kind === 'throw') throw value;
+         if (innerError) throw innerResult;
+         anObject$c(innerResult);
+         return value;
+       };
+
+       var global$F = global$1m;
+       var bind$d = functionBindContext;
+       var call$f = functionCall;
+       var anObject$b = anObject$n;
+       var tryToString = tryToString$5;
+       var isArrayIteratorMethod$2 = isArrayIteratorMethod$3;
+       var lengthOfArrayLike$c = lengthOfArrayLike$g;
+       var isPrototypeOf$4 = objectIsPrototypeOf;
+       var getIterator$3 = getIterator$4;
+       var getIteratorMethod$3 = getIteratorMethod$5;
+       var iteratorClose$1 = iteratorClose$2;
+
+       var TypeError$b = global$F.TypeError;
+
+       var Result = function (stopped, result) {
+         this.stopped = stopped;
+         this.result = result;
+       };
+
+       var ResultPrototype = Result.prototype;
+
+       var iterate$3 = function (iterable, unboundFunction, options) {
+         var that = options && options.that;
+         var AS_ENTRIES = !!(options && options.AS_ENTRIES);
+         var IS_ITERATOR = !!(options && options.IS_ITERATOR);
+         var INTERRUPTED = !!(options && options.INTERRUPTED);
+         var fn = bind$d(unboundFunction, that);
+         var iterator, iterFn, index, length, result, next, step;
+
+         var stop = function (condition) {
+           if (iterator) iteratorClose$1(iterator, 'normal', condition);
+           return new Result(true, condition);
+         };
+
+         var callFn = function (value) {
+           if (AS_ENTRIES) {
+             anObject$b(value);
+             return INTERRUPTED ? fn(value[0], value[1], stop) : fn(value[0], value[1]);
+           } return INTERRUPTED ? fn(value, stop) : fn(value);
+         };
+
+         if (IS_ITERATOR) {
+           iterator = iterable;
+         } else {
+           iterFn = getIteratorMethod$3(iterable);
+           if (!iterFn) throw TypeError$b(tryToString(iterable) + ' is not iterable');
+           // optimisation for array iterators
+           if (isArrayIteratorMethod$2(iterFn)) {
+             for (index = 0, length = lengthOfArrayLike$c(iterable); length > index; index++) {
+               result = callFn(iterable[index]);
+               if (result && isPrototypeOf$4(ResultPrototype, result)) return result;
+             } return new Result(false);
+           }
+           iterator = getIterator$3(iterable, iterFn);
+         }
+
+         next = iterator.next;
+         while (!(step = call$f(next, iterator)).done) {
+           try {
+             result = callFn(step.value);
+           } catch (error) {
+             iteratorClose$1(iterator, 'throw', error);
+           }
+           if (typeof result == 'object' && result && isPrototypeOf$4(ResultPrototype, result)) return result;
+         } return new Result(false);
+       };
+
+       var wellKnownSymbol$b = wellKnownSymbol$t;
+
+       var ITERATOR$5 = wellKnownSymbol$b('iterator');
+       var SAFE_CLOSING = false;
+
+       try {
+         var called = 0;
+         var iteratorWithReturn = {
+           next: function () {
+             return { done: !!called++ };
+           },
+           'return': function () {
+             SAFE_CLOSING = true;
+           }
+         };
+         iteratorWithReturn[ITERATOR$5] = function () {
+           return this;
+         };
+         // eslint-disable-next-line es/no-array-from, no-throw-literal -- required for testing
+         Array.from(iteratorWithReturn, function () { throw 2; });
+       } catch (error) { /* empty */ }
+
+       var checkCorrectnessOfIteration$4 = function (exec, SKIP_CLOSING) {
+         if (!SKIP_CLOSING && !SAFE_CLOSING) return false;
+         var ITERATION_SUPPORT = false;
          try {
            var object = {};
-           object[ITERATOR$4] = function () {
+           object[ITERATOR$5] = function () {
              return {
                next: function () {
                  return { done: ITERATION_SUPPORT = true };
          return ITERATION_SUPPORT;
        };
 
-       var engineIsIos = /(iphone|ipod|ipad).*applewebkit/i.test(engineUserAgent);
-
-       var location$1 = global_1.location;
-       var set$2 = global_1.setImmediate;
-       var clear = global_1.clearImmediate;
-       var process$2 = global_1.process;
-       var MessageChannel = global_1.MessageChannel;
-       var Dispatch = global_1.Dispatch;
+       var userAgent$6 = engineUserAgent;
+
+       var engineIsIos = /(?:ipad|iphone|ipod).*applewebkit/i.test(userAgent$6);
+
+       var classof$5 = classofRaw$1;
+       var global$E = global$1m;
+
+       var engineIsNode = classof$5(global$E.process) == 'process';
+
+       var global$D = global$1m;
+       var apply$7 = functionApply;
+       var bind$c = functionBindContext;
+       var isCallable$8 = isCallable$r;
+       var hasOwn$8 = hasOwnProperty_1;
+       var fails$A = fails$S;
+       var html = html$2;
+       var arraySlice$8 = arraySlice$c;
+       var createElement = documentCreateElement$2;
+       var IS_IOS$1 = engineIsIos;
+       var IS_NODE$4 = engineIsNode;
+
+       var set$2 = global$D.setImmediate;
+       var clear = global$D.clearImmediate;
+       var process$3 = global$D.process;
+       var Dispatch$1 = global$D.Dispatch;
+       var Function$3 = global$D.Function;
+       var MessageChannel = global$D.MessageChannel;
+       var String$2 = global$D.String;
        var counter = 0;
        var queue = {};
        var ONREADYSTATECHANGE = 'onreadystatechange';
-       var defer, channel, port;
+       var location$1, defer, channel, port;
+
+       try {
+         // Deno throws a ReferenceError on `location` access without `--location` flag
+         location$1 = global$D.location;
+       } catch (error) { /* empty */ }
 
        var run = function (id) {
-         // eslint-disable-next-line no-prototype-builtins
-         if (queue.hasOwnProperty(id)) {
+         if (hasOwn$8(queue, id)) {
            var fn = queue[id];
            delete queue[id];
            fn();
 
        var post = function (id) {
          // old engines have not location.origin
-         global_1.postMessage(id + '', location$1.protocol + '//' + location$1.host);
+         global$D.postMessage(String$2(id), location$1.protocol + '//' + location$1.host);
        };
 
        // Node.js 0.9+ & IE10+ has setImmediate, otherwise:
        if (!set$2 || !clear) {
          set$2 = function setImmediate(fn) {
-           var args = [];
-           var i = 1;
-           while (arguments.length > i) args.push(arguments[i++]);
+           var args = arraySlice$8(arguments, 1);
            queue[++counter] = function () {
-             // eslint-disable-next-line no-new-func
-             (typeof fn == 'function' ? fn : Function(fn)).apply(undefined, args);
+             apply$7(isCallable$8(fn) ? fn : Function$3(fn), undefined, args);
            };
            defer(counter);
            return counter;
            delete queue[id];
          };
          // Node.js 0.8-
-         if (classofRaw(process$2) == 'process') {
+         if (IS_NODE$4) {
            defer = function (id) {
-             process$2.nextTick(runner(id));
+             process$3.nextTick(runner(id));
            };
          // Sphere (JS game engine) Dispatch API
-         } else if (Dispatch && Dispatch.now) {
+         } else if (Dispatch$1 && Dispatch$1.now) {
            defer = function (id) {
-             Dispatch.now(runner(id));
+             Dispatch$1.now(runner(id));
            };
          // Browsers with MessageChannel, includes WebWorkers
          // except iOS - https://github.com/zloirock/core-js/issues/624
-         } else if (MessageChannel && !engineIsIos) {
+         } else if (MessageChannel && !IS_IOS$1) {
            channel = new MessageChannel();
            port = channel.port2;
            channel.port1.onmessage = listener;
-           defer = functionBindContext(port.postMessage, port, 1);
+           defer = bind$c(port.postMessage, port);
          // Browsers with postMessage, skip WebWorkers
          // IE8 has postMessage, but it's sync & typeof its postMessage is 'object'
          } else if (
-           global_1.addEventListener &&
-           typeof postMessage == 'function' &&
-           !global_1.importScripts &&
-           !fails(post) &&
-           location$1.protocol !== 'file:'
+           global$D.addEventListener &&
+           isCallable$8(global$D.postMessage) &&
+           !global$D.importScripts &&
+           location$1 && location$1.protocol !== 'file:' &&
+           !fails$A(post)
          ) {
            defer = post;
-           global_1.addEventListener('message', listener, false);
+           global$D.addEventListener('message', listener, false);
          // IE8-
-         } else if (ONREADYSTATECHANGE in documentCreateElement('script')) {
+         } else if (ONREADYSTATECHANGE in createElement('script')) {
            defer = function (id) {
-             html.appendChild(documentCreateElement('script'))[ONREADYSTATECHANGE] = function () {
+             html.appendChild(createElement('script'))[ONREADYSTATECHANGE] = function () {
                html.removeChild(this);
                run(id);
              };
          }
        }
 
-       var task = {
+       var task$1 = {
          set: set$2,
          clear: clear
        };
 
-       var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+       var userAgent$5 = engineUserAgent;
+       var global$C = global$1m;
+
+       var engineIsIosPebble = /ipad|iphone|ipod/i.test(userAgent$5) && global$C.Pebble !== undefined;
 
-       var macrotask = task.set;
+       var userAgent$4 = engineUserAgent;
 
+       var engineIsWebosWebkit = /web0s(?!.*chrome)/i.test(userAgent$4);
 
-       var MutationObserver = global_1.MutationObserver || global_1.WebKitMutationObserver;
-       var process$3 = global_1.process;
-       var Promise$1 = global_1.Promise;
-       var IS_NODE = classofRaw(process$3) == 'process';
+       var global$B = global$1m;
+       var bind$b = functionBindContext;
+       var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
+       var macrotask = task$1.set;
+       var IS_IOS = engineIsIos;
+       var IS_IOS_PEBBLE = engineIsIosPebble;
+       var IS_WEBOS_WEBKIT = engineIsWebosWebkit;
+       var IS_NODE$3 = engineIsNode;
+
+       var MutationObserver = global$B.MutationObserver || global$B.WebKitMutationObserver;
+       var document$2 = global$B.document;
+       var process$2 = global$B.process;
+       var Promise$1 = global$B.Promise;
        // Node.js 11 shows ExperimentalWarning on getting `queueMicrotask`
-       var queueMicrotaskDescriptor = getOwnPropertyDescriptor$2(global_1, 'queueMicrotask');
+       var queueMicrotaskDescriptor = getOwnPropertyDescriptor$3(global$B, 'queueMicrotask');
        var queueMicrotask = queueMicrotaskDescriptor && queueMicrotaskDescriptor.value;
 
-       var flush, head, last, notify, toggle, node, promise, then;
+       var flush, head, last, notify$1, toggle, node, promise, then;
 
        // modern engines have queueMicrotask method
        if (!queueMicrotask) {
          flush = function () {
            var parent, fn;
-           if (IS_NODE && (parent = process$3.domain)) parent.exit();
+           if (IS_NODE$3 && (parent = process$2.domain)) parent.exit();
            while (head) {
              fn = head.fn;
              head = head.next;
              try {
                fn();
              } catch (error) {
-               if (head) notify();
+               if (head) notify$1();
                else last = undefined;
                throw error;
              }
            if (parent) parent.enter();
          };
 
-         // Node.js
-         if (IS_NODE) {
-           notify = function () {
-             process$3.nextTick(flush);
-           };
          // browsers with MutationObserver, except iOS - https://github.com/zloirock/core-js/issues/339
-         } else if (MutationObserver && !engineIsIos) {
+         // also except WebOS Webkit https://github.com/zloirock/core-js/issues/898
+         if (!IS_IOS && !IS_NODE$3 && !IS_WEBOS_WEBKIT && MutationObserver && document$2) {
            toggle = true;
-           node = document.createTextNode('');
+           node = document$2.createTextNode('');
            new MutationObserver(flush).observe(node, { characterData: true });
-           notify = function () {
+           notify$1 = function () {
              node.data = toggle = !toggle;
            };
          // environments with maybe non-completely correct, but existent Promise
-         } else if (Promise$1 && Promise$1.resolve) {
+         } else if (!IS_IOS_PEBBLE && Promise$1 && Promise$1.resolve) {
            // Promise.resolve without an argument throws an error in LG WebOS 2
            promise = Promise$1.resolve(undefined);
-           then = promise.then;
-           notify = function () {
-             then.call(promise, flush);
+           // workaround of WebKit ~ iOS Safari 10.1 bug
+           promise.constructor = Promise$1;
+           then = bind$b(promise.then, promise);
+           notify$1 = function () {
+             then(flush);
+           };
+         // Node.js without promises
+         } else if (IS_NODE$3) {
+           notify$1 = function () {
+             process$2.nextTick(flush);
            };
          // for other environments - macrotask based on:
          // - setImmediate
          // - onreadystatechange
          // - setTimeout
          } else {
-           notify = function () {
-             // strange IE + webpack dev server bug - use .call(global)
-             macrotask.call(global_1, flush);
+           // strange IE + webpack dev server bug - use .bind(global)
+           macrotask = bind$b(macrotask, global$B);
+           notify$1 = function () {
+             macrotask(flush);
            };
          }
        }
 
-       var microtask = queueMicrotask || function (fn) {
+       var microtask$1 = queueMicrotask || function (fn) {
          var task = { fn: fn, next: undefined };
          if (last) last.next = task;
          if (!head) {
            head = task;
-           notify();
+           notify$1();
          } last = task;
        };
 
+       var newPromiseCapability$2 = {};
+
+       var aCallable$6 = aCallable$a;
+
        var PromiseCapability = function (C) {
          var resolve, reject;
          this.promise = new C(function ($$resolve, $$reject) {
            resolve = $$resolve;
            reject = $$reject;
          });
-         this.resolve = aFunction$1(resolve);
-         this.reject = aFunction$1(reject);
+         this.resolve = aCallable$6(resolve);
+         this.reject = aCallable$6(reject);
        };
 
-       // 25.4.1.5 NewPromiseCapability(C)
-       var f$7 = function (C) {
+       // `NewPromiseCapability` abstract operation
+       // https://tc39.es/ecma262/#sec-newpromisecapability
+       newPromiseCapability$2.f = function (C) {
          return new PromiseCapability(C);
        };
 
-       var newPromiseCapability = {
-               f: f$7
-       };
+       var anObject$a = anObject$n;
+       var isObject$j = isObject$s;
+       var newPromiseCapability$1 = newPromiseCapability$2;
 
-       var promiseResolve = function (C, x) {
-         anObject(C);
-         if (isObject(x) && x.constructor === C) return x;
-         var promiseCapability = newPromiseCapability.f(C);
+       var promiseResolve$2 = function (C, x) {
+         anObject$a(C);
+         if (isObject$j(x) && x.constructor === C) return x;
+         var promiseCapability = newPromiseCapability$1.f(C);
          var resolve = promiseCapability.resolve;
          resolve(x);
          return promiseCapability.promise;
        };
 
-       var hostReportErrors = function (a, b) {
-         var console = global_1.console;
+       var global$A = global$1m;
+
+       var hostReportErrors$1 = function (a, b) {
+         var console = global$A.console;
          if (console && console.error) {
-           arguments.length === 1 ? console.error(a) : console.error(a, b);
+           arguments.length == 1 ? console.error(a) : console.error(a, b);
          }
        };
 
-       var perform = function (exec) {
+       var perform$1 = function (exec) {
          try {
            return { error: false, value: exec() };
          } catch (error) {
          }
        };
 
-       var task$1 = task.set;
-
-
-
-
-
-
-
-
-
-
-       var SPECIES$5 = wellKnownSymbol('species');
+       var engineIsBrowser = typeof window == 'object';
+
+       var $$$ = _export;
+       var global$z = global$1m;
+       var getBuiltIn$3 = getBuiltIn$b;
+       var call$e = functionCall;
+       var NativePromise$1 = nativePromiseConstructor;
+       var redefine$8 = redefine$h.exports;
+       var redefineAll$2 = redefineAll$4;
+       var setPrototypeOf$3 = objectSetPrototypeOf;
+       var setToStringTag$5 = setToStringTag$a;
+       var setSpecies$3 = setSpecies$5;
+       var aCallable$5 = aCallable$a;
+       var isCallable$7 = isCallable$r;
+       var isObject$i = isObject$s;
+       var anInstance$5 = anInstance$7;
+       var inspectSource = inspectSource$4;
+       var iterate$2 = iterate$3;
+       var checkCorrectnessOfIteration$3 = checkCorrectnessOfIteration$4;
+       var speciesConstructor$3 = speciesConstructor$5;
+       var task = task$1.set;
+       var microtask = microtask$1;
+       var promiseResolve$1 = promiseResolve$2;
+       var hostReportErrors = hostReportErrors$1;
+       var newPromiseCapabilityModule = newPromiseCapability$2;
+       var perform = perform$1;
+       var InternalStateModule$4 = internalState;
+       var isForced$3 = isForced_1;
+       var wellKnownSymbol$a = wellKnownSymbol$t;
+       var IS_BROWSER = engineIsBrowser;
+       var IS_NODE$2 = engineIsNode;
+       var V8_VERSION$1 = engineV8Version;
+
+       var SPECIES$2 = wellKnownSymbol$a('species');
        var PROMISE = 'Promise';
-       var getInternalState$3 = internalState.get;
-       var setInternalState$3 = internalState.set;
-       var getInternalPromiseState = internalState.getterFor(PROMISE);
-       var PromiseConstructor = nativePromiseConstructor;
-       var TypeError$1 = global_1.TypeError;
-       var document$2 = global_1.document;
-       var process$4 = global_1.process;
-       var $fetch = getBuiltIn('fetch');
-       var newPromiseCapability$1 = newPromiseCapability.f;
-       var newGenericPromiseCapability = newPromiseCapability$1;
-       var IS_NODE$1 = classofRaw(process$4) == 'process';
-       var DISPATCH_EVENT = !!(document$2 && document$2.createEvent && global_1.dispatchEvent);
+
+       var getInternalState$1 = InternalStateModule$4.get;
+       var setInternalState$4 = InternalStateModule$4.set;
+       var getInternalPromiseState = InternalStateModule$4.getterFor(PROMISE);
+       var NativePromisePrototype = NativePromise$1 && NativePromise$1.prototype;
+       var PromiseConstructor = NativePromise$1;
+       var PromisePrototype = NativePromisePrototype;
+       var TypeError$a = global$z.TypeError;
+       var document$1 = global$z.document;
+       var process$1 = global$z.process;
+       var newPromiseCapability = newPromiseCapabilityModule.f;
+       var newGenericPromiseCapability = newPromiseCapability;
+
+       var DISPATCH_EVENT = !!(document$1 && document$1.createEvent && global$z.dispatchEvent);
+       var NATIVE_REJECTION_EVENT = isCallable$7(global$z.PromiseRejectionEvent);
        var UNHANDLED_REJECTION = 'unhandledrejection';
        var REJECTION_HANDLED = 'rejectionhandled';
        var PENDING = 0;
        var REJECTED = 2;
        var HANDLED = 1;
        var UNHANDLED = 2;
+       var SUBCLASSING = false;
+
        var Internal, OwnPromiseCapability, PromiseWrapper, nativeThen;
 
-       var FORCED = isForced_1(PROMISE, function () {
-         var GLOBAL_CORE_JS_PROMISE = inspectSource(PromiseConstructor) !== String(PromiseConstructor);
-         if (!GLOBAL_CORE_JS_PROMISE) {
-           // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables
-           // https://bugs.chromium.org/p/chromium/issues/detail?id=830565
-           // We can't detect it synchronously, so just check versions
-           if (engineV8Version === 66) return true;
-           // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test
-           if (!IS_NODE$1 && typeof PromiseRejectionEvent != 'function') return true;
-         }
+       var FORCED$h = isForced$3(PROMISE, function () {
+         var PROMISE_CONSTRUCTOR_SOURCE = inspectSource(PromiseConstructor);
+         var GLOBAL_CORE_JS_PROMISE = PROMISE_CONSTRUCTOR_SOURCE !== String(PromiseConstructor);
+         // V8 6.6 (Node 10 and Chrome 66) have a bug with resolving custom thenables
+         // https://bugs.chromium.org/p/chromium/issues/detail?id=830565
+         // We can't detect it synchronously, so just check versions
+         if (!GLOBAL_CORE_JS_PROMISE && V8_VERSION$1 === 66) return true;
          // We can't use @@species feature detection in V8 since it causes
          // deoptimization and performance degradation
          // https://github.com/zloirock/core-js/issues/679
-         if (engineV8Version >= 51 && /native code/.test(PromiseConstructor)) return false;
+         if (V8_VERSION$1 >= 51 && /native code/.test(PROMISE_CONSTRUCTOR_SOURCE)) return false;
          // Detect correctness of subclassing with @@species support
-         var promise = PromiseConstructor.resolve(1);
+         var promise = new PromiseConstructor(function (resolve) { resolve(1); });
          var FakePromise = function (exec) {
            exec(function () { /* empty */ }, function () { /* empty */ });
          };
          var constructor = promise.constructor = {};
-         constructor[SPECIES$5] = FakePromise;
-         return !(promise.then(function () { /* empty */ }) instanceof FakePromise);
+         constructor[SPECIES$2] = FakePromise;
+         SUBCLASSING = promise.then(function () { /* empty */ }) instanceof FakePromise;
+         if (!SUBCLASSING) return true;
+         // Unhandled rejections tracking support, NodeJS Promise without it fails @@species test
+         return !GLOBAL_CORE_JS_PROMISE && IS_BROWSER && !NATIVE_REJECTION_EVENT;
        });
 
-       var INCORRECT_ITERATION = FORCED || !checkCorrectnessOfIteration(function (iterable) {
+       var INCORRECT_ITERATION$1 = FORCED$h || !checkCorrectnessOfIteration$3(function (iterable) {
          PromiseConstructor.all(iterable)['catch'](function () { /* empty */ });
        });
 
        // helpers
        var isThenable = function (it) {
          var then;
-         return isObject(it) && typeof (then = it.then) == 'function' ? then : false;
+         return isObject$i(it) && isCallable$7(then = it.then) ? then : false;
        };
 
-       var notify$1 = function (promise, state, isReject) {
+       var notify = function (state, isReject) {
          if (state.notified) return;
          state.notified = true;
          var chain = state.reactions;
              try {
                if (handler) {
                  if (!ok) {
-                   if (state.rejection === UNHANDLED) onHandleUnhandled(promise, state);
+                   if (state.rejection === UNHANDLED) onHandleUnhandled(state);
                    state.rejection = HANDLED;
                  }
                  if (handler === true) result = value;
                    }
                  }
                  if (result === reaction.promise) {
-                   reject(TypeError$1('Promise-chain cycle'));
+                   reject(TypeError$a('Promise-chain cycle'));
                  } else if (then = isThenable(result)) {
-                   then.call(result, resolve, reject);
+                   call$e(then, result, resolve, reject);
                  } else resolve(result);
                } else reject(value);
              } catch (error) {
            }
            state.reactions = [];
            state.notified = false;
-           if (isReject && !state.rejection) onUnhandled(promise, state);
+           if (isReject && !state.rejection) onUnhandled(state);
          });
        };
 
-       var dispatchEvent = function (name, promise, reason) {
+       var dispatchEvent$1 = function (name, promise, reason) {
          var event, handler;
          if (DISPATCH_EVENT) {
-           event = document$2.createEvent('Event');
+           event = document$1.createEvent('Event');
            event.promise = promise;
            event.reason = reason;
            event.initEvent(name, false, true);
-           global_1.dispatchEvent(event);
+           global$z.dispatchEvent(event);
          } else event = { promise: promise, reason: reason };
-         if (handler = global_1['on' + name]) handler(event);
+         if (!NATIVE_REJECTION_EVENT && (handler = global$z['on' + name])) handler(event);
          else if (name === UNHANDLED_REJECTION) hostReportErrors('Unhandled promise rejection', reason);
        };
 
-       var onUnhandled = function (promise, state) {
-         task$1.call(global_1, function () {
+       var onUnhandled = function (state) {
+         call$e(task, global$z, function () {
+           var promise = state.facade;
            var value = state.value;
            var IS_UNHANDLED = isUnhandled(state);
            var result;
            if (IS_UNHANDLED) {
              result = perform(function () {
-               if (IS_NODE$1) {
-                 process$4.emit('unhandledRejection', value, promise);
-               } else dispatchEvent(UNHANDLED_REJECTION, promise, value);
+               if (IS_NODE$2) {
+                 process$1.emit('unhandledRejection', value, promise);
+               } else dispatchEvent$1(UNHANDLED_REJECTION, promise, value);
              });
              // Browsers should not trigger `rejectionHandled` event if it was handled here, NodeJS - should
-             state.rejection = IS_NODE$1 || isUnhandled(state) ? UNHANDLED : HANDLED;
+             state.rejection = IS_NODE$2 || isUnhandled(state) ? UNHANDLED : HANDLED;
              if (result.error) throw result.value;
            }
          });
          return state.rejection !== HANDLED && !state.parent;
        };
 
-       var onHandleUnhandled = function (promise, state) {
-         task$1.call(global_1, function () {
-           if (IS_NODE$1) {
-             process$4.emit('rejectionHandled', promise);
-           } else dispatchEvent(REJECTION_HANDLED, promise, state.value);
+       var onHandleUnhandled = function (state) {
+         call$e(task, global$z, function () {
+           var promise = state.facade;
+           if (IS_NODE$2) {
+             process$1.emit('rejectionHandled', promise);
+           } else dispatchEvent$1(REJECTION_HANDLED, promise, state.value);
          });
        };
 
-       var bind = function (fn, promise, state, unwrap) {
+       var bind$a = function (fn, state, unwrap) {
          return function (value) {
-           fn(promise, state, value, unwrap);
+           fn(state, value, unwrap);
          };
        };
 
-       var internalReject = function (promise, state, value, unwrap) {
+       var internalReject = function (state, value, unwrap) {
          if (state.done) return;
          state.done = true;
          if (unwrap) state = unwrap;
          state.value = value;
          state.state = REJECTED;
-         notify$1(promise, state, true);
+         notify(state, true);
        };
 
-       var internalResolve = function (promise, state, value, unwrap) {
+       var internalResolve = function (state, value, unwrap) {
          if (state.done) return;
          state.done = true;
          if (unwrap) state = unwrap;
          try {
-           if (promise === value) throw TypeError$1("Promise can't be resolved itself");
+           if (state.facade === value) throw TypeError$a("Promise can't be resolved itself");
            var then = isThenable(value);
            if (then) {
              microtask(function () {
                var wrapper = { done: false };
                try {
-                 then.call(value,
-                   bind(internalResolve, promise, wrapper, state),
-                   bind(internalReject, promise, wrapper, state)
+                 call$e(then, value,
+                   bind$a(internalResolve, wrapper, state),
+                   bind$a(internalReject, wrapper, state)
                  );
                } catch (error) {
-                 internalReject(promise, wrapper, error, state);
+                 internalReject(wrapper, error, state);
                }
              });
            } else {
              state.value = value;
              state.state = FULFILLED;
-             notify$1(promise, state, false);
+             notify(state, false);
            }
          } catch (error) {
-           internalReject(promise, { done: false }, error, state);
+           internalReject({ done: false }, error, state);
          }
        };
 
        // constructor polyfill
-       if (FORCED) {
+       if (FORCED$h) {
          // 25.4.3.1 Promise(executor)
          PromiseConstructor = function Promise(executor) {
-           anInstance(this, PromiseConstructor, PROMISE);
-           aFunction$1(executor);
-           Internal.call(this);
-           var state = getInternalState$3(this);
+           anInstance$5(this, PromisePrototype);
+           aCallable$5(executor);
+           call$e(Internal, this);
+           var state = getInternalState$1(this);
            try {
-             executor(bind(internalResolve, this, state), bind(internalReject, this, state));
+             executor(bind$a(internalResolve, state), bind$a(internalReject, state));
            } catch (error) {
-             internalReject(this, state, error);
+             internalReject(state, error);
            }
          };
-         // eslint-disable-next-line no-unused-vars
+         PromisePrototype = PromiseConstructor.prototype;
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
          Internal = function Promise(executor) {
-           setInternalState$3(this, {
+           setInternalState$4(this, {
              type: PROMISE,
              done: false,
              notified: false,
              value: undefined
            });
          };
-         Internal.prototype = redefineAll(PromiseConstructor.prototype, {
+         Internal.prototype = redefineAll$2(PromisePrototype, {
            // `Promise.prototype.then` method
-           // https://tc39.github.io/ecma262/#sec-promise.prototype.then
+           // https://tc39.es/ecma262/#sec-promise.prototype.then
            then: function then(onFulfilled, onRejected) {
              var state = getInternalPromiseState(this);
-             var reaction = newPromiseCapability$1(speciesConstructor(this, PromiseConstructor));
-             reaction.ok = typeof onFulfilled == 'function' ? onFulfilled : true;
-             reaction.fail = typeof onRejected == 'function' && onRejected;
-             reaction.domain = IS_NODE$1 ? process$4.domain : undefined;
+             var reactions = state.reactions;
+             var reaction = newPromiseCapability(speciesConstructor$3(this, PromiseConstructor));
+             reaction.ok = isCallable$7(onFulfilled) ? onFulfilled : true;
+             reaction.fail = isCallable$7(onRejected) && onRejected;
+             reaction.domain = IS_NODE$2 ? process$1.domain : undefined;
              state.parent = true;
-             state.reactions.push(reaction);
-             if (state.state != PENDING) notify$1(this, state, false);
+             reactions[reactions.length] = reaction;
+             if (state.state != PENDING) notify(state, false);
              return reaction.promise;
            },
            // `Promise.prototype.catch` method
-           // https://tc39.github.io/ecma262/#sec-promise.prototype.catch
+           // https://tc39.es/ecma262/#sec-promise.prototype.catch
            'catch': function (onRejected) {
              return this.then(undefined, onRejected);
            }
          });
          OwnPromiseCapability = function () {
            var promise = new Internal();
-           var state = getInternalState$3(promise);
+           var state = getInternalState$1(promise);
            this.promise = promise;
-           this.resolve = bind(internalResolve, promise, state);
-           this.reject = bind(internalReject, promise, state);
+           this.resolve = bind$a(internalResolve, state);
+           this.reject = bind$a(internalReject, state);
          };
-         newPromiseCapability.f = newPromiseCapability$1 = function (C) {
+         newPromiseCapabilityModule.f = newPromiseCapability = function (C) {
            return C === PromiseConstructor || C === PromiseWrapper
              ? new OwnPromiseCapability(C)
              : newGenericPromiseCapability(C);
          };
 
-         if ( typeof nativePromiseConstructor == 'function') {
-           nativeThen = nativePromiseConstructor.prototype.then;
+         if (isCallable$7(NativePromise$1) && NativePromisePrototype !== Object.prototype) {
+           nativeThen = NativePromisePrototype.then;
 
-           // wrap native Promise#then for native async functions
-           redefine(nativePromiseConstructor.prototype, 'then', function then(onFulfilled, onRejected) {
-             var that = this;
-             return new PromiseConstructor(function (resolve, reject) {
-               nativeThen.call(that, resolve, reject);
-             }).then(onFulfilled, onRejected);
-           // https://github.com/zloirock/core-js/issues/640
-           }, { unsafe: true });
-
-           // wrap fetch result
-           if (typeof $fetch == 'function') _export({ global: true, enumerable: true, forced: true }, {
-             // eslint-disable-next-line no-unused-vars
-             fetch: function fetch(input /* , init */) {
-               return promiseResolve(PromiseConstructor, $fetch.apply(global_1, arguments));
-             }
-           });
+           if (!SUBCLASSING) {
+             // make `Promise#then` return a polyfilled `Promise` for native promise-based APIs
+             redefine$8(NativePromisePrototype, 'then', function then(onFulfilled, onRejected) {
+               var that = this;
+               return new PromiseConstructor(function (resolve, reject) {
+                 call$e(nativeThen, that, resolve, reject);
+               }).then(onFulfilled, onRejected);
+             // https://github.com/zloirock/core-js/issues/640
+             }, { unsafe: true });
+
+             // makes sure that native promise-based APIs `Promise#catch` properly works with patched `Promise#then`
+             redefine$8(NativePromisePrototype, 'catch', PromisePrototype['catch'], { unsafe: true });
+           }
+
+           // make `.constructor === Promise` work for native promise-based APIs
+           try {
+             delete NativePromisePrototype.constructor;
+           } catch (error) { /* empty */ }
+
+           // make `instanceof Promise` work for native promise-based APIs
+           if (setPrototypeOf$3) {
+             setPrototypeOf$3(NativePromisePrototype, PromisePrototype);
+           }
          }
        }
 
-       _export({ global: true, wrap: true, forced: FORCED }, {
+       $$$({ global: true, wrap: true, forced: FORCED$h }, {
          Promise: PromiseConstructor
        });
 
-       setToStringTag(PromiseConstructor, PROMISE, false);
-       setSpecies(PROMISE);
+       setToStringTag$5(PromiseConstructor, PROMISE, false);
+       setSpecies$3(PROMISE);
 
-       PromiseWrapper = getBuiltIn(PROMISE);
+       PromiseWrapper = getBuiltIn$3(PROMISE);
 
        // statics
-       _export({ target: PROMISE, stat: true, forced: FORCED }, {
+       $$$({ target: PROMISE, stat: true, forced: FORCED$h }, {
          // `Promise.reject` method
-         // https://tc39.github.io/ecma262/#sec-promise.reject
+         // https://tc39.es/ecma262/#sec-promise.reject
          reject: function reject(r) {
-           var capability = newPromiseCapability$1(this);
-           capability.reject.call(undefined, r);
+           var capability = newPromiseCapability(this);
+           call$e(capability.reject, undefined, r);
            return capability.promise;
          }
        });
 
-       _export({ target: PROMISE, stat: true, forced:  FORCED }, {
+       $$$({ target: PROMISE, stat: true, forced: FORCED$h }, {
          // `Promise.resolve` method
-         // https://tc39.github.io/ecma262/#sec-promise.resolve
+         // https://tc39.es/ecma262/#sec-promise.resolve
          resolve: function resolve(x) {
-           return promiseResolvethis, x);
+           return promiseResolve$1(this, x);
          }
        });
 
-       _export({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION }, {
+       $$$({ target: PROMISE, stat: true, forced: INCORRECT_ITERATION$1 }, {
          // `Promise.all` method
-         // https://tc39.github.io/ecma262/#sec-promise.all
+         // https://tc39.es/ecma262/#sec-promise.all
          all: function all(iterable) {
            var C = this;
-           var capability = newPromiseCapability$1(C);
+           var capability = newPromiseCapability(C);
            var resolve = capability.resolve;
            var reject = capability.reject;
            var result = perform(function () {
-             var $promiseResolve = aFunction$1(C.resolve);
+             var $promiseResolve = aCallable$5(C.resolve);
              var values = [];
              var counter = 0;
              var remaining = 1;
-             iterate_1(iterable, function (promise) {
+             iterate$2(iterable, function (promise) {
                var index = counter++;
                var alreadyCalled = false;
-               values.push(undefined);
                remaining++;
-               $promiseResolve.call(C, promise).then(function (value) {
+               call$e($promiseResolve, C, promise).then(function (value) {
                  if (alreadyCalled) return;
                  alreadyCalled = true;
                  values[index] = value;
            return capability.promise;
          },
          // `Promise.race` method
-         // https://tc39.github.io/ecma262/#sec-promise.race
+         // https://tc39.es/ecma262/#sec-promise.race
          race: function race(iterable) {
            var C = this;
-           var capability = newPromiseCapability$1(C);
+           var capability = newPromiseCapability(C);
            var reject = capability.reject;
            var result = perform(function () {
-             var $promiseResolve = aFunction$1(C.resolve);
-             iterate_1(iterable, function (promise) {
-               $promiseResolve.call(C, promise).then(capability.resolve, reject);
+             var $promiseResolve = aCallable$5(C.resolve);
+             iterate$2(iterable, function (promise) {
+               call$e($promiseResolve, C, promise).then(capability.resolve, reject);
              });
            });
            if (result.error) reject(result.value);
          }
        });
 
-       // `RegExp.prototype.flags` getter implementation
-       // https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags
-       var regexpFlags = function () {
-         var that = anObject(this);
-         var result = '';
-         if (that.global) result += 'g';
-         if (that.ignoreCase) result += 'i';
-         if (that.multiline) result += 'm';
-         if (that.dotAll) result += 's';
-         if (that.unicode) result += 'u';
-         if (that.sticky) result += 'y';
-         return result;
-       };
+       var typedArrayConstructor = {exports: {}};
 
-       // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError,
-       // so we use an intermediate function.
-       function RE(s, f) {
-         return RegExp(s, f);
-       }
+       /* eslint-disable no-new -- required for testing */
 
-       var UNSUPPORTED_Y = fails(function () {
-         // babel-minify transpiles RegExp('a', 'y') -> /a/y and it causes SyntaxError
-         var re = RE('a', 'y');
-         re.lastIndex = 2;
-         return re.exec('abcd') != null;
-       });
+       var global$y = global$1m;
+       var fails$z = fails$S;
+       var checkCorrectnessOfIteration$2 = checkCorrectnessOfIteration$4;
+       var NATIVE_ARRAY_BUFFER_VIEWS$1 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
 
-       var BROKEN_CARET = fails(function () {
-         // https://bugzilla.mozilla.org/show_bug.cgi?id=773687
-         var re = RE('^r', 'gy');
-         re.lastIndex = 2;
-         return re.exec('str') != null;
+       var ArrayBuffer$2 = global$y.ArrayBuffer;
+       var Int8Array$2 = global$y.Int8Array;
+
+       var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS$1 || !fails$z(function () {
+         Int8Array$2(1);
+       }) || !fails$z(function () {
+         new Int8Array$2(-1);
+       }) || !checkCorrectnessOfIteration$2(function (iterable) {
+         new Int8Array$2();
+         new Int8Array$2(null);
+         new Int8Array$2(1.5);
+         new Int8Array$2(iterable);
+       }, true) || fails$z(function () {
+         // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
+         return new Int8Array$2(new ArrayBuffer$2(2), 1, undefined).length !== 1;
        });
 
-       var regexpStickyHelpers = {
-               UNSUPPORTED_Y: UNSUPPORTED_Y,
-               BROKEN_CARET: BROKEN_CARET
-       };
+       var isObject$h = isObject$s;
 
-       var nativeExec = RegExp.prototype.exec;
-       // This always refers to the native implementation, because the
-       // String#replace polyfill uses ./fix-regexp-well-known-symbol-logic.js,
-       // which loads this file before patching the method.
-       var nativeReplace = String.prototype.replace;
+       var floor$6 = Math.floor;
 
-       var patchedExec = nativeExec;
+       // `IsIntegralNumber` abstract operation
+       // https://tc39.es/ecma262/#sec-isintegralnumber
+       // eslint-disable-next-line es/no-number-isinteger -- safe
+       var isIntegralNumber$1 = Number.isInteger || function isInteger(it) {
+         return !isObject$h(it) && isFinite(it) && floor$6(it) === it;
+       };
 
-       var UPDATES_LAST_INDEX_WRONG = (function () {
-         var re1 = /a/;
-         var re2 = /b*/g;
-         nativeExec.call(re1, 'a');
-         nativeExec.call(re2, 'a');
-         return re1.lastIndex !== 0 || re2.lastIndex !== 0;
-       })();
+       var global$x = global$1m;
+       var toIntegerOrInfinity$5 = toIntegerOrInfinity$b;
 
-       var UNSUPPORTED_Y$1 = regexpStickyHelpers.UNSUPPORTED_Y || regexpStickyHelpers.BROKEN_CARET;
+       var RangeError$9 = global$x.RangeError;
 
-       // nonparticipating capturing group, copied from es5-shim's String#split patch.
-       var NPCG_INCLUDED = /()??/.exec('')[1] !== undefined;
+       var toPositiveInteger$1 = function (it) {
+         var result = toIntegerOrInfinity$5(it);
+         if (result < 0) throw RangeError$9("The argument can't be less than 0");
+         return result;
+       };
 
-       var PATCH = UPDATES_LAST_INDEX_WRONG || NPCG_INCLUDED || UNSUPPORTED_Y$1;
+       var global$w = global$1m;
+       var toPositiveInteger = toPositiveInteger$1;
 
-       if (PATCH) {
-         patchedExec = function exec(str) {
-           var re = this;
-           var lastIndex, reCopy, match, i;
-           var sticky = UNSUPPORTED_Y$1 && re.sticky;
-           var flags = regexpFlags.call(re);
-           var source = re.source;
-           var charsAdded = 0;
-           var strCopy = str;
+       var RangeError$8 = global$w.RangeError;
 
-           if (sticky) {
-             flags = flags.replace('y', '');
-             if (flags.indexOf('g') === -1) {
-               flags += 'g';
-             }
+       var toOffset$2 = function (it, BYTES) {
+         var offset = toPositiveInteger(it);
+         if (offset % BYTES) throw RangeError$8('Wrong offset');
+         return offset;
+       };
 
-             strCopy = String(str).slice(re.lastIndex);
-             // Support anchored sticky behavior.
-             if (re.lastIndex > 0 && (!re.multiline || re.multiline && str[re.lastIndex - 1] !== '\n')) {
-               source = '(?: ' + source + ')';
-               strCopy = ' ' + strCopy;
-               charsAdded++;
-             }
-             // ^(? + rx + ) is needed, in combination with some str slicing, to
-             // simulate the 'y' flag.
-             reCopy = new RegExp('^(?:' + source + ')', flags);
-           }
+       var bind$9 = functionBindContext;
+       var call$d = functionCall;
+       var aConstructor$1 = aConstructor$3;
+       var toObject$d = toObject$j;
+       var lengthOfArrayLike$b = lengthOfArrayLike$g;
+       var getIterator$2 = getIterator$4;
+       var getIteratorMethod$2 = getIteratorMethod$5;
+       var isArrayIteratorMethod$1 = isArrayIteratorMethod$3;
+       var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
 
-           if (NPCG_INCLUDED) {
-             reCopy = new RegExp('^' + source + '$(?!\\s)', flags);
+       var typedArrayFrom$2 = function from(source /* , mapfn, thisArg */) {
+         var C = aConstructor$1(this);
+         var O = toObject$d(source);
+         var argumentsLength = arguments.length;
+         var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+         var mapping = mapfn !== undefined;
+         var iteratorMethod = getIteratorMethod$2(O);
+         var i, length, result, step, iterator, next;
+         if (iteratorMethod && !isArrayIteratorMethod$1(iteratorMethod)) {
+           iterator = getIterator$2(O, iteratorMethod);
+           next = iterator.next;
+           O = [];
+           while (!(step = call$d(next, iterator)).done) {
+             O.push(step.value);
            }
-           if (UPDATES_LAST_INDEX_WRONG) lastIndex = re.lastIndex;
-
-           match = nativeExec.call(sticky ? reCopy : re, strCopy);
+         }
+         if (mapping && argumentsLength > 2) {
+           mapfn = bind$9(mapfn, arguments[2]);
+         }
+         length = lengthOfArrayLike$b(O);
+         result = new (aTypedArrayConstructor$2(C))(length);
+         for (i = 0; length > i; i++) {
+           result[i] = mapping ? mapfn(O[i], i) : O[i];
+         }
+         return result;
+       };
 
-           if (sticky) {
-             if (match) {
-               match.input = match.input.slice(charsAdded);
-               match[0] = match[0].slice(charsAdded);
-               match.index = re.lastIndex;
-               re.lastIndex += match[0].length;
-             } else re.lastIndex = 0;
-           } else if (UPDATES_LAST_INDEX_WRONG && match) {
-             re.lastIndex = re.global ? match.index + match[0].length : lastIndex;
-           }
-           if (NPCG_INCLUDED && match && match.length > 1) {
-             // Fix browsers whose `exec` methods don't consistently return `undefined`
-             // for NPCG, like IE8. NOTE: This doesn' work for /(.?)?/
-             nativeReplace.call(match[0], reCopy, function () {
-               for (i = 1; i < arguments.length - 2; i++) {
-                 if (arguments[i] === undefined) match[i] = undefined;
-               }
-             });
-           }
+       var isCallable$6 = isCallable$r;
+       var isObject$g = isObject$s;
+       var setPrototypeOf$2 = objectSetPrototypeOf;
 
-           return match;
-         };
-       }
+       // makes subclassing work correct for wrapped built-ins
+       var inheritIfRequired$4 = function ($this, dummy, Wrapper) {
+         var NewTarget, NewTargetPrototype;
+         if (
+           // it can work only with native `setPrototypeOf`
+           setPrototypeOf$2 &&
+           // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
+           isCallable$6(NewTarget = dummy.constructor) &&
+           NewTarget !== Wrapper &&
+           isObject$g(NewTargetPrototype = NewTarget.prototype) &&
+           NewTargetPrototype !== Wrapper.prototype
+         ) setPrototypeOf$2($this, NewTargetPrototype);
+         return $this;
+       };
 
-       var regexpExec = patchedExec;
+       var $$_ = _export;
+       var global$v = global$1m;
+       var call$c = functionCall;
+       var DESCRIPTORS$c = descriptors;
+       var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1 = typedArrayConstructorsRequireWrappers;
+       var ArrayBufferViewCore$n = arrayBufferViewCore;
+       var ArrayBufferModule = arrayBuffer;
+       var anInstance$4 = anInstance$7;
+       var createPropertyDescriptor$2 = createPropertyDescriptor$7;
+       var createNonEnumerableProperty$2 = createNonEnumerableProperty$b;
+       var isIntegralNumber = isIntegralNumber$1;
+       var toLength$7 = toLength$c;
+       var toIndex = toIndex$2;
+       var toOffset$1 = toOffset$2;
+       var toPropertyKey$1 = toPropertyKey$5;
+       var hasOwn$7 = hasOwnProperty_1;
+       var classof$4 = classof$d;
+       var isObject$f = isObject$s;
+       var isSymbol$2 = isSymbol$6;
+       var create$7 = objectCreate;
+       var isPrototypeOf$3 = objectIsPrototypeOf;
+       var setPrototypeOf$1 = objectSetPrototypeOf;
+       var getOwnPropertyNames$2 = objectGetOwnPropertyNames.f;
+       var typedArrayFrom$1 = typedArrayFrom$2;
+       var forEach$1 = arrayIteration.forEach;
+       var setSpecies$2 = setSpecies$5;
+       var definePropertyModule$1 = objectDefineProperty;
+       var getOwnPropertyDescriptorModule$1 = objectGetOwnPropertyDescriptor;
+       var InternalStateModule$3 = internalState;
+       var inheritIfRequired$3 = inheritIfRequired$4;
+
+       var getInternalState = InternalStateModule$3.get;
+       var setInternalState$3 = InternalStateModule$3.set;
+       var nativeDefineProperty = definePropertyModule$1.f;
+       var nativeGetOwnPropertyDescriptor$1 = getOwnPropertyDescriptorModule$1.f;
+       var round = Math.round;
+       var RangeError$7 = global$v.RangeError;
+       var ArrayBuffer$1 = ArrayBufferModule.ArrayBuffer;
+       var ArrayBufferPrototype = ArrayBuffer$1.prototype;
+       var DataView$1 = ArrayBufferModule.DataView;
+       var NATIVE_ARRAY_BUFFER_VIEWS = ArrayBufferViewCore$n.NATIVE_ARRAY_BUFFER_VIEWS;
+       var TYPED_ARRAY_CONSTRUCTOR$1 = ArrayBufferViewCore$n.TYPED_ARRAY_CONSTRUCTOR;
+       var TYPED_ARRAY_TAG = ArrayBufferViewCore$n.TYPED_ARRAY_TAG;
+       var TypedArray = ArrayBufferViewCore$n.TypedArray;
+       var TypedArrayPrototype = ArrayBufferViewCore$n.TypedArrayPrototype;
+       var aTypedArrayConstructor$1 = ArrayBufferViewCore$n.aTypedArrayConstructor;
+       var isTypedArray = ArrayBufferViewCore$n.isTypedArray;
+       var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
+       var WRONG_LENGTH = 'Wrong length';
 
-       _export({ target: 'RegExp', proto: true, forced: /./.exec !== regexpExec }, {
-         exec: regexpExec
-       });
+       var fromList = function (C, list) {
+         aTypedArrayConstructor$1(C);
+         var index = 0;
+         var length = list.length;
+         var result = new C(length);
+         while (length > index) result[index] = list[index++];
+         return result;
+       };
 
-       var TO_STRING$1 = 'toString';
-       var RegExpPrototype = RegExp.prototype;
-       var nativeToString = RegExpPrototype[TO_STRING$1];
+       var addGetter = function (it, key) {
+         nativeDefineProperty(it, key, { get: function () {
+           return getInternalState(this)[key];
+         } });
+       };
 
-       var NOT_GENERIC = fails(function () { return nativeToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
-       // FF44- RegExp#toString has a wrong name
-       var INCORRECT_NAME = nativeToString.name != TO_STRING$1;
+       var isArrayBuffer = function (it) {
+         var klass;
+         return isPrototypeOf$3(ArrayBufferPrototype, it) || (klass = classof$4(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
+       };
 
-       // `RegExp.prototype.toString` method
-       // https://tc39.github.io/ecma262/#sec-regexp.prototype.tostring
-       if (NOT_GENERIC || INCORRECT_NAME) {
-         redefine(RegExp.prototype, TO_STRING$1, function toString() {
-           var R = anObject(this);
-           var p = String(R.source);
-           var rf = R.flags;
-           var f = String(rf === undefined && R instanceof RegExp && !('flags' in RegExpPrototype) ? regexpFlags.call(R) : rf);
-           return '/' + p + '/' + f;
-         }, { unsafe: true });
-       }
+       var isTypedArrayIndex = function (target, key) {
+         return isTypedArray(target)
+           && !isSymbol$2(key)
+           && key in target
+           && isIntegralNumber(+key)
+           && key >= 0;
+       };
 
-       // `String.prototype.{ codePointAt, at }` methods implementation
-       var createMethod$2 = function (CONVERT_TO_STRING) {
-         return function ($this, pos) {
-           var S = String(requireObjectCoercible($this));
-           var position = toInteger(pos);
-           var size = S.length;
-           var first, second;
-           if (position < 0 || position >= size) return CONVERT_TO_STRING ? '' : undefined;
-           first = S.charCodeAt(position);
-           return first < 0xD800 || first > 0xDBFF || position + 1 === size
-             || (second = S.charCodeAt(position + 1)) < 0xDC00 || second > 0xDFFF
-               ? CONVERT_TO_STRING ? S.charAt(position) : first
-               : CONVERT_TO_STRING ? S.slice(position, position + 2) : (first - 0xD800 << 10) + (second - 0xDC00) + 0x10000;
-         };
+       var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
+         key = toPropertyKey$1(key);
+         return isTypedArrayIndex(target, key)
+           ? createPropertyDescriptor$2(2, target[key])
+           : nativeGetOwnPropertyDescriptor$1(target, key);
        };
 
-       var stringMultibyte = {
-         // `String.prototype.codePointAt` method
-         // https://tc39.github.io/ecma262/#sec-string.prototype.codepointat
-         codeAt: createMethod$2(false),
-         // `String.prototype.at` method
-         // https://github.com/mathiasbynens/String.prototype.at
-         charAt: createMethod$2(true)
+       var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
+         key = toPropertyKey$1(key);
+         if (isTypedArrayIndex(target, key)
+           && isObject$f(descriptor)
+           && hasOwn$7(descriptor, 'value')
+           && !hasOwn$7(descriptor, 'get')
+           && !hasOwn$7(descriptor, 'set')
+           // TODO: add validation descriptor w/o calling accessors
+           && !descriptor.configurable
+           && (!hasOwn$7(descriptor, 'writable') || descriptor.writable)
+           && (!hasOwn$7(descriptor, 'enumerable') || descriptor.enumerable)
+         ) {
+           target[key] = descriptor.value;
+           return target;
+         } return nativeDefineProperty(target, key, descriptor);
        };
 
-       var charAt = stringMultibyte.charAt;
+       if (DESCRIPTORS$c) {
+         if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+           getOwnPropertyDescriptorModule$1.f = wrappedGetOwnPropertyDescriptor;
+           definePropertyModule$1.f = wrappedDefineProperty;
+           addGetter(TypedArrayPrototype, 'buffer');
+           addGetter(TypedArrayPrototype, 'byteOffset');
+           addGetter(TypedArrayPrototype, 'byteLength');
+           addGetter(TypedArrayPrototype, 'length');
+         }
+
+         $$_({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
+           getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
+           defineProperty: wrappedDefineProperty
+         });
+
+         typedArrayConstructor.exports = function (TYPE, wrapper, CLAMPED) {
+           var BYTES = TYPE.match(/\d+$/)[0] / 8;
+           var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
+           var GETTER = 'get' + TYPE;
+           var SETTER = 'set' + TYPE;
+           var NativeTypedArrayConstructor = global$v[CONSTRUCTOR_NAME];
+           var TypedArrayConstructor = NativeTypedArrayConstructor;
+           var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
+           var exported = {};
 
+           var getter = function (that, index) {
+             var data = getInternalState(that);
+             return data.view[GETTER](index * BYTES + data.byteOffset, true);
+           };
 
+           var setter = function (that, index, value) {
+             var data = getInternalState(that);
+             if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
+             data.view[SETTER](index * BYTES + data.byteOffset, value, true);
+           };
 
-       var STRING_ITERATOR = 'String Iterator';
-       var setInternalState$4 = internalState.set;
-       var getInternalState$4 = internalState.getterFor(STRING_ITERATOR);
+           var addElement = function (that, index) {
+             nativeDefineProperty(that, index, {
+               get: function () {
+                 return getter(this, index);
+               },
+               set: function (value) {
+                 return setter(this, index, value);
+               },
+               enumerable: true
+             });
+           };
 
-       // `String.prototype[@@iterator]` method
-       // https://tc39.github.io/ecma262/#sec-string.prototype-@@iterator
-       defineIterator(String, 'String', function (iterated) {
-         setInternalState$4(this, {
-           type: STRING_ITERATOR,
-           string: String(iterated),
-           index: 0
-         });
-       // `%StringIteratorPrototype%.next` method
-       // https://tc39.github.io/ecma262/#sec-%stringiteratorprototype%.next
-       }, function next() {
-         var state = getInternalState$4(this);
-         var string = state.string;
-         var index = state.index;
-         var point;
-         if (index >= string.length) return { value: undefined, done: true };
-         point = charAt(string, index);
-         state.index += point.length;
-         return { value: point, done: false };
-       });
+           if (!NATIVE_ARRAY_BUFFER_VIEWS) {
+             TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
+               anInstance$4(that, TypedArrayConstructorPrototype);
+               var index = 0;
+               var byteOffset = 0;
+               var buffer, byteLength, length;
+               if (!isObject$f(data)) {
+                 length = toIndex(data);
+                 byteLength = length * BYTES;
+                 buffer = new ArrayBuffer$1(byteLength);
+               } else if (isArrayBuffer(data)) {
+                 buffer = data;
+                 byteOffset = toOffset$1(offset, BYTES);
+                 var $len = data.byteLength;
+                 if ($length === undefined) {
+                   if ($len % BYTES) throw RangeError$7(WRONG_LENGTH);
+                   byteLength = $len - byteOffset;
+                   if (byteLength < 0) throw RangeError$7(WRONG_LENGTH);
+                 } else {
+                   byteLength = toLength$7($length) * BYTES;
+                   if (byteLength + byteOffset > $len) throw RangeError$7(WRONG_LENGTH);
+                 }
+                 length = byteLength / BYTES;
+               } else if (isTypedArray(data)) {
+                 return fromList(TypedArrayConstructor, data);
+               } else {
+                 return call$c(typedArrayFrom$1, TypedArrayConstructor, data);
+               }
+               setInternalState$3(that, {
+                 buffer: buffer,
+                 byteOffset: byteOffset,
+                 byteLength: byteLength,
+                 length: length,
+                 view: new DataView$1(buffer)
+               });
+               while (index < length) addElement(that, index++);
+             });
 
-       // TODO: Remove from `core-js@4` since it's moved to entry points
+             if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+             TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = create$7(TypedArrayPrototype);
+           } else if (TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS$1) {
+             TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
+               anInstance$4(dummy, TypedArrayConstructorPrototype);
+               return inheritIfRequired$3(function () {
+                 if (!isObject$f(data)) return new NativeTypedArrayConstructor(toIndex(data));
+                 if (isArrayBuffer(data)) return $length !== undefined
+                   ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES), $length)
+                   : typedArrayOffset !== undefined
+                     ? new NativeTypedArrayConstructor(data, toOffset$1(typedArrayOffset, BYTES))
+                     : new NativeTypedArrayConstructor(data);
+                 if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
+                 return call$c(typedArrayFrom$1, TypedArrayConstructor, data);
+               }(), dummy, TypedArrayConstructor);
+             });
 
+             if (setPrototypeOf$1) setPrototypeOf$1(TypedArrayConstructor, TypedArray);
+             forEach$1(getOwnPropertyNames$2(NativeTypedArrayConstructor), function (key) {
+               if (!(key in TypedArrayConstructor)) {
+                 createNonEnumerableProperty$2(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
+               }
+             });
+             TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
+           }
 
+           if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
+             createNonEnumerableProperty$2(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
+           }
 
+           createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_CONSTRUCTOR$1, TypedArrayConstructor);
 
+           if (TYPED_ARRAY_TAG) {
+             createNonEnumerableProperty$2(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
+           }
 
+           exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
 
+           $$_({
+             global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
+           }, exported);
 
-       var SPECIES$6 = wellKnownSymbol('species');
+           if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
+             createNonEnumerableProperty$2(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
+           }
 
-       var REPLACE_SUPPORTS_NAMED_GROUPS = !fails(function () {
-         // #replace needs built-in support for named groups.
-         // #match works fine because it just return the exec results, even if it has
-         // a "grops" property.
-         var re = /./;
-         re.exec = function () {
-           var result = [];
-           result.groups = { a: '7' };
-           return result;
-         };
-         return ''.replace(re, '$<a>') !== '7';
-       });
+           if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
+             createNonEnumerableProperty$2(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
+           }
 
-       // IE <= 11 replaces $0 with the whole match, as if it was $&
-       // https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0
-       var REPLACE_KEEPS_$0 = (function () {
-         return 'a'.replace(/./, '$0') === '$0';
-       })();
+           setSpecies$2(CONSTRUCTOR_NAME);
+         };
+       } else typedArrayConstructor.exports = function () { /* empty */ };
 
-       var REPLACE = wellKnownSymbol('replace');
-       // Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string
-       var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {
-         if (/./[REPLACE]) {
-           return /./[REPLACE]('a', '$0') === '';
-         }
-         return false;
-       })();
+       var createTypedArrayConstructor$1 = typedArrayConstructor.exports;
 
-       // Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
-       // Weex JS has frozen built-in prototypes, so use try / catch wrapper
-       var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails(function () {
-         var re = /(?:)/;
-         var originalExec = re.exec;
-         re.exec = function () { return originalExec.apply(this, arguments); };
-         var result = 'ab'.split(re);
-         return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';
+       // `Uint8Array` constructor
+       // https://tc39.es/ecma262/#sec-typedarray-objects
+       createTypedArrayConstructor$1('Uint8', function (init) {
+         return function Uint8Array(data, byteOffset, length) {
+           return init(this, data, byteOffset, length);
+         };
        });
 
-       var fixRegexpWellKnownSymbolLogic = function (KEY, length, exec, sham) {
-         var SYMBOL = wellKnownSymbol(KEY);
+       var toObject$c = toObject$j;
+       var toAbsoluteIndex$4 = toAbsoluteIndex$8;
+       var lengthOfArrayLike$a = lengthOfArrayLike$g;
 
-         var DELEGATES_TO_SYMBOL = !fails(function () {
-           // String methods call symbol-named RegEp methods
-           var O = {};
-           O[SYMBOL] = function () { return 7; };
-           return ''[KEY](O) != 7;
-         });
+       var min$7 = Math.min;
 
-         var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails(function () {
-           // Symbol-named RegExp methods call .exec
-           var execCalled = false;
-           var re = /a/;
+       // `Array.prototype.copyWithin` method implementation
+       // https://tc39.es/ecma262/#sec-array.prototype.copywithin
+       // eslint-disable-next-line es/no-array-prototype-copywithin -- safe
+       var arrayCopyWithin = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {
+         var O = toObject$c(this);
+         var len = lengthOfArrayLike$a(O);
+         var to = toAbsoluteIndex$4(target, len);
+         var from = toAbsoluteIndex$4(start, len);
+         var end = arguments.length > 2 ? arguments[2] : undefined;
+         var count = min$7((end === undefined ? len : toAbsoluteIndex$4(end, len)) - from, len - to);
+         var inc = 1;
+         if (from < to && to < from + count) {
+           inc = -1;
+           from += count - 1;
+           to += count - 1;
+         }
+         while (count-- > 0) {
+           if (from in O) O[to] = O[from];
+           else delete O[to];
+           to += inc;
+           from += inc;
+         } return O;
+       };
 
-           if (KEY === 'split') {
-             // We can't use real regex here since it causes deoptimization
-             // and serious performance degradation in V8
-             // https://github.com/zloirock/core-js/issues/306
-             re = {};
-             // RegExp[@@split] doesn't call the regex's exec method, but first creates
-             // a new one. We need to return the patched regex when creating the new one.
-             re.constructor = {};
-             re.constructor[SPECIES$6] = function () { return re; };
-             re.flags = '';
-             re[SYMBOL] = /./[SYMBOL];
-           }
+       var uncurryThis$A = functionUncurryThis;
+       var ArrayBufferViewCore$m = arrayBufferViewCore;
+       var $ArrayCopyWithin = arrayCopyWithin;
 
-           re.exec = function () { execCalled = true; return null; };
+       var u$ArrayCopyWithin = uncurryThis$A($ArrayCopyWithin);
+       var aTypedArray$l = ArrayBufferViewCore$m.aTypedArray;
+       var exportTypedArrayMethod$m = ArrayBufferViewCore$m.exportTypedArrayMethod;
 
-           re[SYMBOL]('');
-           return !execCalled;
-         });
+       // `%TypedArray%.prototype.copyWithin` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.copywithin
+       exportTypedArrayMethod$m('copyWithin', function copyWithin(target, start /* , end */) {
+         return u$ArrayCopyWithin(aTypedArray$l(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
+       });
 
-         if (
-           !DELEGATES_TO_SYMBOL ||
-           !DELEGATES_TO_EXEC ||
-           (KEY === 'replace' && !(
-             REPLACE_SUPPORTS_NAMED_GROUPS &&
-             REPLACE_KEEPS_$0 &&
-             !REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE
-           )) ||
-           (KEY === 'split' && !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC)
-         ) {
-           var nativeRegExpMethod = /./[SYMBOL];
-           var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
-             if (regexp.exec === regexpExec) {
-               if (DELEGATES_TO_SYMBOL && !forceStringMethod) {
-                 // The native String method already delegates to @@method (this
-                 // polyfilled function), leasing to infinite recursion.
-                 // We avoid it by directly calling the native @@method method.
-                 return { done: true, value: nativeRegExpMethod.call(regexp, str, arg2) };
-               }
-               return { done: true, value: nativeMethod.call(str, regexp, arg2) };
-             }
-             return { done: false };
-           }, {
-             REPLACE_KEEPS_$0: REPLACE_KEEPS_$0,
-             REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE: REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE
-           });
-           var stringMethod = methods[0];
-           var regexMethod = methods[1];
-
-           redefine(String.prototype, KEY, stringMethod);
-           redefine(RegExp.prototype, SYMBOL, length == 2
-             // 21.2.5.8 RegExp.prototype[@@replace](string, replaceValue)
-             // 21.2.5.11 RegExp.prototype[@@split](string, limit)
-             ? function (string, arg) { return regexMethod.call(string, this, arg); }
-             // 21.2.5.6 RegExp.prototype[@@match](string)
-             // 21.2.5.9 RegExp.prototype[@@search](string)
-             : function (string) { return regexMethod.call(string, this); }
-           );
-         }
+       var ArrayBufferViewCore$l = arrayBufferViewCore;
+       var $every$1 = arrayIteration.every;
 
-         if (sham) createNonEnumerableProperty(RegExp.prototype[SYMBOL], 'sham', true);
-       };
+       var aTypedArray$k = ArrayBufferViewCore$l.aTypedArray;
+       var exportTypedArrayMethod$l = ArrayBufferViewCore$l.exportTypedArrayMethod;
 
-       var charAt$1 = stringMultibyte.charAt;
+       // `%TypedArray%.prototype.every` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.every
+       exportTypedArrayMethod$l('every', function every(callbackfn /* , thisArg */) {
+         return $every$1(aTypedArray$k(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       });
 
-       // `AdvanceStringIndex` abstract operation
-       // https://tc39.github.io/ecma262/#sec-advancestringindex
-       var advanceStringIndex = function (S, index, unicode) {
-         return index + (unicode ? charAt$1(S, index).length : 1);
-       };
+       var ArrayBufferViewCore$k = arrayBufferViewCore;
+       var call$b = functionCall;
+       var $fill = arrayFill$1;
 
-       // `RegExpExec` abstract operation
-       // https://tc39.github.io/ecma262/#sec-regexpexec
-       var regexpExecAbstract = function (R, S) {
-         var exec = R.exec;
-         if (typeof exec === 'function') {
-           var result = exec.call(R, S);
-           if (typeof result !== 'object') {
-             throw TypeError('RegExp exec method returned something other than an Object or null');
-           }
-           return result;
-         }
+       var aTypedArray$j = ArrayBufferViewCore$k.aTypedArray;
+       var exportTypedArrayMethod$k = ArrayBufferViewCore$k.exportTypedArrayMethod;
 
-         if (classofRaw(R) !== 'RegExp') {
-           throw TypeError('RegExp#exec called on incompatible receiver');
-         }
+       // `%TypedArray%.prototype.fill` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.fill
+       exportTypedArrayMethod$k('fill', function fill(value /* , start, end */) {
+         var length = arguments.length;
+         return call$b(
+           $fill,
+           aTypedArray$j(this),
+           value,
+           length > 1 ? arguments[1] : undefined,
+           length > 2 ? arguments[2] : undefined
+         );
+       });
 
-         return regexpExec.call(R, S);
+       var arrayFromConstructorAndList$1 = function (Constructor, list) {
+         var index = 0;
+         var length = list.length;
+         var result = new Constructor(length);
+         while (length > index) result[index] = list[index++];
+         return result;
        };
 
-       var max$2 = Math.max;
-       var min$2 = Math.min;
-       var floor$2 = Math.floor;
-       var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d\d?|<[^>]*>)/g;
-       var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d\d?)/g;
+       var ArrayBufferViewCore$j = arrayBufferViewCore;
+       var speciesConstructor$2 = speciesConstructor$5;
 
-       var maybeToString = function (it) {
-         return it === undefined ? it : String(it);
+       var TYPED_ARRAY_CONSTRUCTOR = ArrayBufferViewCore$j.TYPED_ARRAY_CONSTRUCTOR;
+       var aTypedArrayConstructor = ArrayBufferViewCore$j.aTypedArrayConstructor;
+
+       // a part of `TypedArraySpeciesCreate` abstract operation
+       // https://tc39.es/ecma262/#typedarray-species-create
+       var typedArraySpeciesConstructor$4 = function (originalArray) {
+         return aTypedArrayConstructor(speciesConstructor$2(originalArray, originalArray[TYPED_ARRAY_CONSTRUCTOR]));
        };
 
-       // @@replace logic
-       fixRegexpWellKnownSymbolLogic('replace', 2, function (REPLACE, nativeReplace, maybeCallNative, reason) {
-         var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = reason.REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE;
-         var REPLACE_KEEPS_$0 = reason.REPLACE_KEEPS_$0;
-         var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';
+       var arrayFromConstructorAndList = arrayFromConstructorAndList$1;
+       var typedArraySpeciesConstructor$3 = typedArraySpeciesConstructor$4;
 
-         return [
-           // `String.prototype.replace` method
-           // https://tc39.github.io/ecma262/#sec-string.prototype.replace
-           function replace(searchValue, replaceValue) {
-             var O = requireObjectCoercible(this);
-             var replacer = searchValue == undefined ? undefined : searchValue[REPLACE];
-             return replacer !== undefined
-               ? replacer.call(searchValue, O, replaceValue)
-               : nativeReplace.call(String(O), searchValue, replaceValue);
-           },
-           // `RegExp.prototype[@@replace]` method
-           // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@replace
-           function (regexp, replaceValue) {
-             if (
-               (!REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE && REPLACE_KEEPS_$0) ||
-               (typeof replaceValue === 'string' && replaceValue.indexOf(UNSAFE_SUBSTITUTE) === -1)
-             ) {
-               var res = maybeCallNative(nativeReplace, regexp, this, replaceValue);
-               if (res.done) return res.value;
-             }
+       var typedArrayFromSpeciesAndList = function (instance, list) {
+         return arrayFromConstructorAndList(typedArraySpeciesConstructor$3(instance), list);
+       };
 
-             var rx = anObject(regexp);
-             var S = String(this);
+       var ArrayBufferViewCore$i = arrayBufferViewCore;
+       var $filter$1 = arrayIteration.filter;
+       var fromSpeciesAndList = typedArrayFromSpeciesAndList;
 
-             var functionalReplace = typeof replaceValue === 'function';
-             if (!functionalReplace) replaceValue = String(replaceValue);
+       var aTypedArray$i = ArrayBufferViewCore$i.aTypedArray;
+       var exportTypedArrayMethod$j = ArrayBufferViewCore$i.exportTypedArrayMethod;
 
-             var global = rx.global;
-             if (global) {
-               var fullUnicode = rx.unicode;
-               rx.lastIndex = 0;
-             }
-             var results = [];
-             while (true) {
-               var result = regexpExecAbstract(rx, S);
-               if (result === null) break;
+       // `%TypedArray%.prototype.filter` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.filter
+       exportTypedArrayMethod$j('filter', function filter(callbackfn /* , thisArg */) {
+         var list = $filter$1(aTypedArray$i(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         return fromSpeciesAndList(this, list);
+       });
 
-               results.push(result);
-               if (!global) break;
+       var ArrayBufferViewCore$h = arrayBufferViewCore;
+       var $find$1 = arrayIteration.find;
 
-               var matchStr = String(result[0]);
-               if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
-             }
+       var aTypedArray$h = ArrayBufferViewCore$h.aTypedArray;
+       var exportTypedArrayMethod$i = ArrayBufferViewCore$h.exportTypedArrayMethod;
 
-             var accumulatedResult = '';
-             var nextSourcePosition = 0;
-             for (var i = 0; i < results.length; i++) {
-               result = results[i];
+       // `%TypedArray%.prototype.find` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.find
+       exportTypedArrayMethod$i('find', function find(predicate /* , thisArg */) {
+         return $find$1(aTypedArray$h(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
+       });
 
-               var matched = String(result[0]);
-               var position = max$2(min$2(toInteger(result.index), S.length), 0);
-               var captures = [];
-               // NOTE: This is equivalent to
-               //   captures = result.slice(1).map(maybeToString)
-               // but for some reason `nativeSlice.call(result, 1, result.length)` (called in
-               // the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
-               // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
-               for (var j = 1; j < result.length; j++) captures.push(maybeToString(result[j]));
-               var namedCaptures = result.groups;
-               if (functionalReplace) {
-                 var replacerArgs = [matched].concat(captures, position, S);
-                 if (namedCaptures !== undefined) replacerArgs.push(namedCaptures);
-                 var replacement = String(replaceValue.apply(undefined, replacerArgs));
-               } else {
-                 replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
-               }
-               if (position >= nextSourcePosition) {
-                 accumulatedResult += S.slice(nextSourcePosition, position) + replacement;
-                 nextSourcePosition = position + matched.length;
-               }
-             }
-             return accumulatedResult + S.slice(nextSourcePosition);
-           }
-         ];
+       var ArrayBufferViewCore$g = arrayBufferViewCore;
+       var $findIndex$1 = arrayIteration.findIndex;
 
-         // https://tc39.github.io/ecma262/#sec-getsubstitution
-         function getSubstitution(matched, str, position, captures, namedCaptures, replacement) {
-           var tailPos = position + matched.length;
-           var m = captures.length;
-           var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
-           if (namedCaptures !== undefined) {
-             namedCaptures = toObject(namedCaptures);
-             symbols = SUBSTITUTION_SYMBOLS;
-           }
-           return nativeReplace.call(replacement, symbols, function (match, ch) {
-             var capture;
-             switch (ch.charAt(0)) {
-               case '$': return '$';
-               case '&': return matched;
-               case '`': return str.slice(0, position);
-               case "'": return str.slice(tailPos);
-               case '<':
-                 capture = namedCaptures[ch.slice(1, -1)];
-                 break;
-               default: // \d\d?
-                 var n = +ch;
-                 if (n === 0) return match;
-                 if (n > m) {
-                   var f = floor$2(n / 10);
-                   if (f === 0) return match;
-                   if (f <= m) return captures[f - 1] === undefined ? ch.charAt(1) : captures[f - 1] + ch.charAt(1);
-                   return match;
-                 }
-                 capture = captures[n - 1];
-             }
-             return capture === undefined ? '' : capture;
-           });
-         }
+       var aTypedArray$g = ArrayBufferViewCore$g.aTypedArray;
+       var exportTypedArrayMethod$h = ArrayBufferViewCore$g.exportTypedArrayMethod;
+
+       // `%TypedArray%.prototype.findIndex` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.findindex
+       exportTypedArrayMethod$h('findIndex', function findIndex(predicate /* , thisArg */) {
+         return $findIndex$1(aTypedArray$g(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
        });
 
-       var MATCH = wellKnownSymbol('match');
+       var ArrayBufferViewCore$f = arrayBufferViewCore;
+       var $forEach = arrayIteration.forEach;
 
-       // `IsRegExp` abstract operation
-       // https://tc39.github.io/ecma262/#sec-isregexp
-       var isRegexp = function (it) {
-         var isRegExp;
-         return isObject(it) && ((isRegExp = it[MATCH]) !== undefined ? !!isRegExp : classofRaw(it) == 'RegExp');
-       };
+       var aTypedArray$f = ArrayBufferViewCore$f.aTypedArray;
+       var exportTypedArrayMethod$g = ArrayBufferViewCore$f.exportTypedArrayMethod;
 
-       var arrayPush = [].push;
-       var min$3 = Math.min;
-       var MAX_UINT32 = 0xFFFFFFFF;
+       // `%TypedArray%.prototype.forEach` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.foreach
+       exportTypedArrayMethod$g('forEach', function forEach(callbackfn /* , thisArg */) {
+         $forEach(aTypedArray$f(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       });
 
-       // babel-minify transpiles RegExp('x', 'y') -> /x/y and it causes SyntaxError
-       var SUPPORTS_Y = !fails(function () { return !RegExp(MAX_UINT32, 'y'); });
+       var ArrayBufferViewCore$e = arrayBufferViewCore;
+       var $includes$1 = arrayIncludes.includes;
 
-       // @@split logic
-       fixRegexpWellKnownSymbolLogic('split', 2, function (SPLIT, nativeSplit, maybeCallNative) {
-         var internalSplit;
-         if (
-           'abbc'.split(/(b)*/)[1] == 'c' ||
-           'test'.split(/(?:)/, -1).length != 4 ||
-           'ab'.split(/(?:ab)*/).length != 2 ||
-           '.'.split(/(.?)(.?)/).length != 4 ||
-           '.'.split(/()()/).length > 1 ||
-           ''.split(/.?/).length
-         ) {
-           // based on es5-shim implementation, need to rework it
-           internalSplit = function (separator, limit) {
-             var string = String(requireObjectCoercible(this));
-             var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
-             if (lim === 0) return [];
-             if (separator === undefined) return [string];
-             // If `separator` is not a regex, use native split
-             if (!isRegexp(separator)) {
-               return nativeSplit.call(string, separator, lim);
-             }
-             var output = [];
-             var flags = (separator.ignoreCase ? 'i' : '') +
-                         (separator.multiline ? 'm' : '') +
-                         (separator.unicode ? 'u' : '') +
-                         (separator.sticky ? 'y' : '');
-             var lastLastIndex = 0;
-             // Make `global` and avoid `lastIndex` issues by working with a copy
-             var separatorCopy = new RegExp(separator.source, flags + 'g');
-             var match, lastIndex, lastLength;
-             while (match = regexpExec.call(separatorCopy, string)) {
-               lastIndex = separatorCopy.lastIndex;
-               if (lastIndex > lastLastIndex) {
-                 output.push(string.slice(lastLastIndex, match.index));
-                 if (match.length > 1 && match.index < string.length) arrayPush.apply(output, match.slice(1));
-                 lastLength = match[0].length;
-                 lastLastIndex = lastIndex;
-                 if (output.length >= lim) break;
-               }
-               if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop
-             }
-             if (lastLastIndex === string.length) {
-               if (lastLength || !separatorCopy.test('')) output.push('');
-             } else output.push(string.slice(lastLastIndex));
-             return output.length > lim ? output.slice(0, lim) : output;
-           };
-         // Chakra, V8
-         } else if ('0'.split(undefined, 0).length) {
-           internalSplit = function (separator, limit) {
-             return separator === undefined && limit === 0 ? [] : nativeSplit.call(this, separator, limit);
-           };
-         } else internalSplit = nativeSplit;
+       var aTypedArray$e = ArrayBufferViewCore$e.aTypedArray;
+       var exportTypedArrayMethod$f = ArrayBufferViewCore$e.exportTypedArrayMethod;
 
-         return [
-           // `String.prototype.split` method
-           // https://tc39.github.io/ecma262/#sec-string.prototype.split
-           function split(separator, limit) {
-             var O = requireObjectCoercible(this);
-             var splitter = separator == undefined ? undefined : separator[SPLIT];
-             return splitter !== undefined
-               ? splitter.call(separator, O, limit)
-               : internalSplit.call(String(O), separator, limit);
-           },
-           // `RegExp.prototype[@@split]` method
-           // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@split
-           //
-           // NOTE: This cannot be properly polyfilled in engines that don't support
-           // the 'y' flag.
-           function (regexp, limit) {
-             var res = maybeCallNative(internalSplit, regexp, this, limit, internalSplit !== nativeSplit);
-             if (res.done) return res.value;
+       // `%TypedArray%.prototype.includes` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.includes
+       exportTypedArrayMethod$f('includes', function includes(searchElement /* , fromIndex */) {
+         return $includes$1(aTypedArray$e(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+       });
 
-             var rx = anObject(regexp);
-             var S = String(this);
-             var C = speciesConstructor(rx, RegExp);
+       var ArrayBufferViewCore$d = arrayBufferViewCore;
+       var $indexOf = arrayIncludes.indexOf;
 
-             var unicodeMatching = rx.unicode;
-             var flags = (rx.ignoreCase ? 'i' : '') +
-                         (rx.multiline ? 'm' : '') +
-                         (rx.unicode ? 'u' : '') +
-                         (SUPPORTS_Y ? 'y' : 'g');
+       var aTypedArray$d = ArrayBufferViewCore$d.aTypedArray;
+       var exportTypedArrayMethod$e = ArrayBufferViewCore$d.exportTypedArrayMethod;
 
-             // ^(? + rx + ) is needed, in combination with some S slicing, to
-             // simulate the 'y' flag.
-             var splitter = new C(SUPPORTS_Y ? rx : '^(?:' + rx.source + ')', flags);
-             var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
-             if (lim === 0) return [];
-             if (S.length === 0) return regexpExecAbstract(splitter, S) === null ? [S] : [];
-             var p = 0;
-             var q = 0;
-             var A = [];
-             while (q < S.length) {
-               splitter.lastIndex = SUPPORTS_Y ? q : 0;
-               var z = regexpExecAbstract(splitter, SUPPORTS_Y ? S : S.slice(q));
-               var e;
-               if (
-                 z === null ||
-                 (e = min$3(toLength(splitter.lastIndex + (SUPPORTS_Y ? 0 : q)), S.length)) === p
-               ) {
-                 q = advanceStringIndex(S, q, unicodeMatching);
-               } else {
-                 A.push(S.slice(p, q));
-                 if (A.length === lim) return A;
-                 for (var i = 1; i <= z.length - 1; i++) {
-                   A.push(z[i]);
-                   if (A.length === lim) return A;
-                 }
-                 q = p = e;
-               }
-             }
-             A.push(S.slice(p));
-             return A;
-           }
-         ];
-       }, !SUPPORTS_Y);
+       // `%TypedArray%.prototype.indexOf` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.indexof
+       exportTypedArrayMethod$e('indexOf', function indexOf(searchElement /* , fromIndex */) {
+         return $indexOf(aTypedArray$d(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
+       });
 
-       // a string of all valid unicode whitespaces
-       // eslint-disable-next-line max-len
-       var whitespaces = '\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u2000\u2001\u2002\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
+       var global$u = global$1m;
+       var uncurryThis$z = functionUncurryThis;
+       var PROPER_FUNCTION_NAME$2 = functionName.PROPER;
+       var ArrayBufferViewCore$c = arrayBufferViewCore;
+       var ArrayIterators = es_array_iterator;
+       var wellKnownSymbol$9 = wellKnownSymbol$t;
 
-       var whitespace = '[' + whitespaces + ']';
-       var ltrim = RegExp('^' + whitespace + whitespace + '*');
-       var rtrim = RegExp(whitespace + whitespace + '*$');
+       var ITERATOR$4 = wellKnownSymbol$9('iterator');
+       var Uint8Array$2 = global$u.Uint8Array;
+       var arrayValues = uncurryThis$z(ArrayIterators.values);
+       var arrayKeys = uncurryThis$z(ArrayIterators.keys);
+       var arrayEntries = uncurryThis$z(ArrayIterators.entries);
+       var aTypedArray$c = ArrayBufferViewCore$c.aTypedArray;
+       var exportTypedArrayMethod$d = ArrayBufferViewCore$c.exportTypedArrayMethod;
+       var nativeTypedArrayIterator = Uint8Array$2 && Uint8Array$2.prototype[ITERATOR$4];
 
-       // `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
-       var createMethod$3 = function (TYPE) {
-         return function ($this) {
-           var string = String(requireObjectCoercible($this));
-           if (TYPE & 1) string = string.replace(ltrim, '');
-           if (TYPE & 2) string = string.replace(rtrim, '');
-           return string;
-         };
-       };
+       var PROPER_ARRAY_VALUES_NAME = !!nativeTypedArrayIterator && nativeTypedArrayIterator.name === 'values';
 
-       var stringTrim = {
-         // `String.prototype.{ trimLeft, trimStart }` methods
-         // https://tc39.github.io/ecma262/#sec-string.prototype.trimstart
-         start: createMethod$3(1),
-         // `String.prototype.{ trimRight, trimEnd }` methods
-         // https://tc39.github.io/ecma262/#sec-string.prototype.trimend
-         end: createMethod$3(2),
-         // `String.prototype.trim` method
-         // https://tc39.github.io/ecma262/#sec-string.prototype.trim
-         trim: createMethod$3(3)
+       var typedArrayValues = function values() {
+         return arrayValues(aTypedArray$c(this));
        };
 
-       var non = '\u200B\u0085\u180E';
-
-       // check that a method works with the correct list
-       // of whitespaces and has a correct name
-       var stringTrimForced = function (METHOD_NAME) {
-         return fails(function () {
-           return !!whitespaces[METHOD_NAME]() || non[METHOD_NAME]() != non || whitespaces[METHOD_NAME].name !== METHOD_NAME;
-         });
-       };
+       // `%TypedArray%.prototype.entries` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.entries
+       exportTypedArrayMethod$d('entries', function entries() {
+         return arrayEntries(aTypedArray$c(this));
+       });
+       // `%TypedArray%.prototype.keys` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.keys
+       exportTypedArrayMethod$d('keys', function keys() {
+         return arrayKeys(aTypedArray$c(this));
+       });
+       // `%TypedArray%.prototype.values` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.values
+       exportTypedArrayMethod$d('values', typedArrayValues, PROPER_FUNCTION_NAME$2 && !PROPER_ARRAY_VALUES_NAME);
+       // `%TypedArray%.prototype[@@iterator]` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype-@@iterator
+       exportTypedArrayMethod$d(ITERATOR$4, typedArrayValues, PROPER_FUNCTION_NAME$2 && !PROPER_ARRAY_VALUES_NAME);
 
-       var $trim = stringTrim.trim;
+       var ArrayBufferViewCore$b = arrayBufferViewCore;
+       var uncurryThis$y = functionUncurryThis;
 
+       var aTypedArray$b = ArrayBufferViewCore$b.aTypedArray;
+       var exportTypedArrayMethod$c = ArrayBufferViewCore$b.exportTypedArrayMethod;
+       var $join = uncurryThis$y([].join);
 
-       // `String.prototype.trim` method
-       // https://tc39.github.io/ecma262/#sec-string.prototype.trim
-       _export({ target: 'String', proto: true, forced: stringTrimForced('trim') }, {
-         trim: function trim() {
-           return $trim(this);
-         }
+       // `%TypedArray%.prototype.join` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.join
+       exportTypedArrayMethod$c('join', function join(separator) {
+         return $join(aTypedArray$b(this), separator);
        });
 
-       /* eslint-disable no-new */
+       /* eslint-disable es/no-array-prototype-lastindexof -- safe */
+       var apply$6 = functionApply;
+       var toIndexedObject$4 = toIndexedObject$c;
+       var toIntegerOrInfinity$4 = toIntegerOrInfinity$b;
+       var lengthOfArrayLike$9 = lengthOfArrayLike$g;
+       var arrayMethodIsStrict$6 = arrayMethodIsStrict$9;
 
+       var min$6 = Math.min;
+       var $lastIndexOf$1 = [].lastIndexOf;
+       var NEGATIVE_ZERO = !!$lastIndexOf$1 && 1 / [1].lastIndexOf(1, -0) < 0;
+       var STRICT_METHOD$6 = arrayMethodIsStrict$6('lastIndexOf');
+       var FORCED$g = NEGATIVE_ZERO || !STRICT_METHOD$6;
 
+       // `Array.prototype.lastIndexOf` method implementation
+       // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+       var arrayLastIndexOf = FORCED$g ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
+         // convert -0 to +0
+         if (NEGATIVE_ZERO) return apply$6($lastIndexOf$1, this, arguments) || 0;
+         var O = toIndexedObject$4(this);
+         var length = lengthOfArrayLike$9(O);
+         var index = length - 1;
+         if (arguments.length > 1) index = min$6(index, toIntegerOrInfinity$4(arguments[1]));
+         if (index < 0) index = length + index;
+         for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;
+         return -1;
+       } : $lastIndexOf$1;
 
-       var NATIVE_ARRAY_BUFFER_VIEWS$2 = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
+       var ArrayBufferViewCore$a = arrayBufferViewCore;
+       var apply$5 = functionApply;
+       var $lastIndexOf = arrayLastIndexOf;
 
-       var ArrayBuffer$3 = global_1.ArrayBuffer;
-       var Int8Array$2 = global_1.Int8Array;
+       var aTypedArray$a = ArrayBufferViewCore$a.aTypedArray;
+       var exportTypedArrayMethod$b = ArrayBufferViewCore$a.exportTypedArrayMethod;
 
-       var typedArrayConstructorsRequireWrappers = !NATIVE_ARRAY_BUFFER_VIEWS$2 || !fails(function () {
-         Int8Array$2(1);
-       }) || !fails(function () {
-         new Int8Array$2(-1);
-       }) || !checkCorrectnessOfIteration(function (iterable) {
-         new Int8Array$2();
-         new Int8Array$2(null);
-         new Int8Array$2(1.5);
-         new Int8Array$2(iterable);
-       }, true) || fails(function () {
-         // Safari (11+) bug - a reason why even Safari 13 should load a typed array polyfill
-         return new Int8Array$2(new ArrayBuffer$3(2), 1, undefined).length !== 1;
+       // `%TypedArray%.prototype.lastIndexOf` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.lastindexof
+       exportTypedArrayMethod$b('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
+         var length = arguments.length;
+         return apply$5($lastIndexOf, aTypedArray$a(this), length > 1 ? [searchElement, arguments[1]] : [searchElement]);
        });
 
-       var toPositiveInteger = function (it) {
-         var result = toInteger(it);
-         if (result < 0) throw RangeError("The argument can't be less than 0");
-         return result;
-       };
+       var ArrayBufferViewCore$9 = arrayBufferViewCore;
+       var $map = arrayIteration.map;
+       var typedArraySpeciesConstructor$2 = typedArraySpeciesConstructor$4;
 
-       var toOffset = function (it, BYTES) {
-         var offset = toPositiveInteger(it);
-         if (offset % BYTES) throw RangeError('Wrong offset');
-         return offset;
-       };
+       var aTypedArray$9 = ArrayBufferViewCore$9.aTypedArray;
+       var exportTypedArrayMethod$a = ArrayBufferViewCore$9.exportTypedArrayMethod;
 
-       var aTypedArrayConstructor$1 = arrayBufferViewCore.aTypedArrayConstructor;
+       // `%TypedArray%.prototype.map` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.map
+       exportTypedArrayMethod$a('map', function map(mapfn /* , thisArg */) {
+         return $map(aTypedArray$9(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
+           return new (typedArraySpeciesConstructor$2(O))(length);
+         });
+       });
 
-       var typedArrayFrom = function from(source /* , mapfn, thisArg */) {
-         var O = toObject(source);
-         var argumentsLength = arguments.length;
-         var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
-         var mapping = mapfn !== undefined;
-         var iteratorMethod = getIteratorMethod(O);
-         var i, length, result, step, iterator, next;
-         if (iteratorMethod != undefined && !isArrayIteratorMethod(iteratorMethod)) {
-           iterator = iteratorMethod.call(O);
-           next = iterator.next;
-           O = [];
-           while (!(step = next.call(iterator)).done) {
-             O.push(step.value);
+       var global$t = global$1m;
+       var aCallable$4 = aCallable$a;
+       var toObject$b = toObject$j;
+       var IndexedObject$2 = indexedObject;
+       var lengthOfArrayLike$8 = lengthOfArrayLike$g;
+
+       var TypeError$9 = global$t.TypeError;
+
+       // `Array.prototype.{ reduce, reduceRight }` methods implementation
+       var createMethod$3 = function (IS_RIGHT) {
+         return function (that, callbackfn, argumentsLength, memo) {
+           aCallable$4(callbackfn);
+           var O = toObject$b(that);
+           var self = IndexedObject$2(O);
+           var length = lengthOfArrayLike$8(O);
+           var index = IS_RIGHT ? length - 1 : 0;
+           var i = IS_RIGHT ? -1 : 1;
+           if (argumentsLength < 2) while (true) {
+             if (index in self) {
+               memo = self[index];
+               index += i;
+               break;
+             }
+             index += i;
+             if (IS_RIGHT ? index < 0 : length <= index) {
+               throw TypeError$9('Reduce of empty array with no initial value');
+             }
            }
-         }
-         if (mapping && argumentsLength > 2) {
-           mapfn = functionBindContext(mapfn, arguments[2], 2);
-         }
-         length = toLength(O.length);
-         result = new (aTypedArrayConstructor$1(this))(length);
-         for (i = 0; length > i; i++) {
-           result[i] = mapping ? mapfn(O[i], i) : O[i];
-         }
-         return result;
+           for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {
+             memo = callbackfn(memo, self[index], index, O);
+           }
+           return memo;
+         };
        };
 
-       // makes subclassing work correct for wrapped built-ins
-       var inheritIfRequired = function ($this, dummy, Wrapper) {
-         var NewTarget, NewTargetPrototype;
-         if (
-           // it can work only with native `setPrototypeOf`
-           objectSetPrototypeOf &&
-           // we haven't completely correct pre-ES6 way for getting `new.target`, so use this
-           typeof (NewTarget = dummy.constructor) == 'function' &&
-           NewTarget !== Wrapper &&
-           isObject(NewTargetPrototype = NewTarget.prototype) &&
-           NewTargetPrototype !== Wrapper.prototype
-         ) objectSetPrototypeOf($this, NewTargetPrototype);
-         return $this;
+       var arrayReduce = {
+         // `Array.prototype.reduce` method
+         // https://tc39.es/ecma262/#sec-array.prototype.reduce
+         left: createMethod$3(false),
+         // `Array.prototype.reduceRight` method
+         // https://tc39.es/ecma262/#sec-array.prototype.reduceright
+         right: createMethod$3(true)
        };
 
-       var typedArrayConstructor = createCommonjsModule(function (module) {
-
-
-
-
-
+       var ArrayBufferViewCore$8 = arrayBufferViewCore;
+       var $reduce$1 = arrayReduce.left;
 
+       var aTypedArray$8 = ArrayBufferViewCore$8.aTypedArray;
+       var exportTypedArrayMethod$9 = ArrayBufferViewCore$8.exportTypedArrayMethod;
 
+       // `%TypedArray%.prototype.reduce` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduce
+       exportTypedArrayMethod$9('reduce', function reduce(callbackfn /* , initialValue */) {
+         var length = arguments.length;
+         return $reduce$1(aTypedArray$8(this), callbackfn, length, length > 1 ? arguments[1] : undefined);
+       });
 
+       var ArrayBufferViewCore$7 = arrayBufferViewCore;
+       var $reduceRight$1 = arrayReduce.right;
 
+       var aTypedArray$7 = ArrayBufferViewCore$7.aTypedArray;
+       var exportTypedArrayMethod$8 = ArrayBufferViewCore$7.exportTypedArrayMethod;
 
+       // `%TypedArray%.prototype.reduceRicht` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reduceright
+       exportTypedArrayMethod$8('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
+         var length = arguments.length;
+         return $reduceRight$1(aTypedArray$7(this), callbackfn, length, length > 1 ? arguments[1] : undefined);
+       });
 
+       var ArrayBufferViewCore$6 = arrayBufferViewCore;
 
+       var aTypedArray$6 = ArrayBufferViewCore$6.aTypedArray;
+       var exportTypedArrayMethod$7 = ArrayBufferViewCore$6.exportTypedArrayMethod;
+       var floor$5 = Math.floor;
 
+       // `%TypedArray%.prototype.reverse` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.reverse
+       exportTypedArrayMethod$7('reverse', function reverse() {
+         var that = this;
+         var length = aTypedArray$6(that).length;
+         var middle = floor$5(length / 2);
+         var index = 0;
+         var value;
+         while (index < middle) {
+           value = that[index];
+           that[index++] = that[--length];
+           that[length] = value;
+         } return that;
+       });
 
+       var global$s = global$1m;
+       var ArrayBufferViewCore$5 = arrayBufferViewCore;
+       var lengthOfArrayLike$7 = lengthOfArrayLike$g;
+       var toOffset = toOffset$2;
+       var toObject$a = toObject$j;
+       var fails$y = fails$S;
 
+       var RangeError$6 = global$s.RangeError;
+       var aTypedArray$5 = ArrayBufferViewCore$5.aTypedArray;
+       var exportTypedArrayMethod$6 = ArrayBufferViewCore$5.exportTypedArrayMethod;
 
+       var FORCED$f = fails$y(function () {
+         // eslint-disable-next-line es/no-typed-arrays -- required for testing
+         new Int8Array(1).set({});
+       });
 
+       // `%TypedArray%.prototype.set` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.set
+       exportTypedArrayMethod$6('set', function set(arrayLike /* , offset */) {
+         aTypedArray$5(this);
+         var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
+         var length = this.length;
+         var src = toObject$a(arrayLike);
+         var len = lengthOfArrayLike$7(src);
+         var index = 0;
+         if (len + offset > length) throw RangeError$6('Wrong length');
+         while (index < len) this[offset + index] = src[index++];
+       }, FORCED$f);
 
-       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
+       var ArrayBufferViewCore$4 = arrayBufferViewCore;
+       var typedArraySpeciesConstructor$1 = typedArraySpeciesConstructor$4;
+       var fails$x = fails$S;
+       var arraySlice$7 = arraySlice$c;
 
-       var forEach = arrayIteration.forEach;
+       var aTypedArray$4 = ArrayBufferViewCore$4.aTypedArray;
+       var exportTypedArrayMethod$5 = ArrayBufferViewCore$4.exportTypedArrayMethod;
 
+       var FORCED$e = fails$x(function () {
+         // eslint-disable-next-line es/no-typed-arrays -- required for testing
+         new Int8Array(1).slice();
+       });
 
+       // `%TypedArray%.prototype.slice` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.slice
+       exportTypedArrayMethod$5('slice', function slice(start, end) {
+         var list = arraySlice$7(aTypedArray$4(this), start, end);
+         var C = typedArraySpeciesConstructor$1(this);
+         var index = 0;
+         var length = list.length;
+         var result = new C(length);
+         while (length > index) result[index] = list[index++];
+         return result;
+       }, FORCED$e);
 
+       var ArrayBufferViewCore$3 = arrayBufferViewCore;
+       var $some$1 = arrayIteration.some;
 
+       var aTypedArray$3 = ArrayBufferViewCore$3.aTypedArray;
+       var exportTypedArrayMethod$4 = ArrayBufferViewCore$3.exportTypedArrayMethod;
 
+       // `%TypedArray%.prototype.some` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.some
+       exportTypedArrayMethod$4('some', function some(callbackfn /* , thisArg */) {
+         return $some$1(aTypedArray$3(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+       });
 
-       var getInternalState = internalState.get;
-       var setInternalState = internalState.set;
-       var nativeDefineProperty = objectDefineProperty.f;
-       var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
-       var round = Math.round;
-       var RangeError = global_1.RangeError;
-       var ArrayBuffer = arrayBuffer.ArrayBuffer;
-       var DataView = arrayBuffer.DataView;
-       var NATIVE_ARRAY_BUFFER_VIEWS = arrayBufferViewCore.NATIVE_ARRAY_BUFFER_VIEWS;
-       var TYPED_ARRAY_TAG = arrayBufferViewCore.TYPED_ARRAY_TAG;
-       var TypedArray = arrayBufferViewCore.TypedArray;
-       var TypedArrayPrototype = arrayBufferViewCore.TypedArrayPrototype;
-       var aTypedArrayConstructor = arrayBufferViewCore.aTypedArrayConstructor;
-       var isTypedArray = arrayBufferViewCore.isTypedArray;
-       var BYTES_PER_ELEMENT = 'BYTES_PER_ELEMENT';
-       var WRONG_LENGTH = 'Wrong length';
+       var arraySlice$6 = arraySlice$c;
 
-       var fromList = function (C, list) {
-         var index = 0;
-         var length = list.length;
-         var result = new (aTypedArrayConstructor(C))(length);
-         while (length > index) result[index] = list[index++];
-         return result;
-       };
+       var floor$4 = Math.floor;
 
-       var addGetter = function (it, key) {
-         nativeDefineProperty(it, key, { get: function () {
-           return getInternalState(this)[key];
-         } });
+       var mergeSort = function (array, comparefn) {
+         var length = array.length;
+         var middle = floor$4(length / 2);
+         return length < 8 ? insertionSort(array, comparefn) : merge$5(
+           array,
+           mergeSort(arraySlice$6(array, 0, middle), comparefn),
+           mergeSort(arraySlice$6(array, middle), comparefn),
+           comparefn
+         );
        };
 
-       var isArrayBuffer = function (it) {
-         var klass;
-         return it instanceof ArrayBuffer || (klass = classof(it)) == 'ArrayBuffer' || klass == 'SharedArrayBuffer';
-       };
+       var insertionSort = function (array, comparefn) {
+         var length = array.length;
+         var i = 1;
+         var element, j;
 
-       var isTypedArrayIndex = function (target, key) {
-         return isTypedArray(target)
-           && typeof key != 'symbol'
-           && key in target
-           && String(+key) == String(key);
+         while (i < length) {
+           j = i;
+           element = array[i];
+           while (j && comparefn(array[j - 1], element) > 0) {
+             array[j] = array[--j];
+           }
+           if (j !== i++) array[j] = element;
+         } return array;
        };
 
-       var wrappedGetOwnPropertyDescriptor = function getOwnPropertyDescriptor(target, key) {
-         return isTypedArrayIndex(target, key = toPrimitive(key, true))
-           ? createPropertyDescriptor(2, target[key])
-           : nativeGetOwnPropertyDescriptor(target, key);
+       var merge$5 = function (array, left, right, comparefn) {
+         var llength = left.length;
+         var rlength = right.length;
+         var lindex = 0;
+         var rindex = 0;
+
+         while (lindex < llength || rindex < rlength) {
+           array[lindex + rindex] = (lindex < llength && rindex < rlength)
+             ? comparefn(left[lindex], right[rindex]) <= 0 ? left[lindex++] : right[rindex++]
+             : lindex < llength ? left[lindex++] : right[rindex++];
+         } return array;
        };
 
-       var wrappedDefineProperty = function defineProperty(target, key, descriptor) {
-         if (isTypedArrayIndex(target, key = toPrimitive(key, true))
-           && isObject(descriptor)
-           && has(descriptor, 'value')
-           && !has(descriptor, 'get')
-           && !has(descriptor, 'set')
-           // TODO: add validation descriptor w/o calling accessors
-           && !descriptor.configurable
-           && (!has(descriptor, 'writable') || descriptor.writable)
-           && (!has(descriptor, 'enumerable') || descriptor.enumerable)
-         ) {
-           target[key] = descriptor.value;
-           return target;
-         } return nativeDefineProperty(target, key, descriptor);
-       };
+       var arraySort$1 = mergeSort;
 
-       if (descriptors) {
-         if (!NATIVE_ARRAY_BUFFER_VIEWS) {
-           objectGetOwnPropertyDescriptor.f = wrappedGetOwnPropertyDescriptor;
-           objectDefineProperty.f = wrappedDefineProperty;
-           addGetter(TypedArrayPrototype, 'buffer');
-           addGetter(TypedArrayPrototype, 'byteOffset');
-           addGetter(TypedArrayPrototype, 'byteLength');
-           addGetter(TypedArrayPrototype, 'length');
-         }
+       var userAgent$3 = engineUserAgent;
 
-         _export({ target: 'Object', stat: true, forced: !NATIVE_ARRAY_BUFFER_VIEWS }, {
-           getOwnPropertyDescriptor: wrappedGetOwnPropertyDescriptor,
-           defineProperty: wrappedDefineProperty
-         });
+       var firefox = userAgent$3.match(/firefox\/(\d+)/i);
 
-         module.exports = function (TYPE, wrapper, CLAMPED) {
-           var BYTES = TYPE.match(/\d+$/)[0] / 8;
-           var CONSTRUCTOR_NAME = TYPE + (CLAMPED ? 'Clamped' : '') + 'Array';
-           var GETTER = 'get' + TYPE;
-           var SETTER = 'set' + TYPE;
-           var NativeTypedArrayConstructor = global_1[CONSTRUCTOR_NAME];
-           var TypedArrayConstructor = NativeTypedArrayConstructor;
-           var TypedArrayConstructorPrototype = TypedArrayConstructor && TypedArrayConstructor.prototype;
-           var exported = {};
+       var engineFfVersion = !!firefox && +firefox[1];
 
-           var getter = function (that, index) {
-             var data = getInternalState(that);
-             return data.view[GETTER](index * BYTES + data.byteOffset, true);
-           };
+       var UA = engineUserAgent;
 
-           var setter = function (that, index, value) {
-             var data = getInternalState(that);
-             if (CLAMPED) value = (value = round(value)) < 0 ? 0 : value > 0xFF ? 0xFF : value & 0xFF;
-             data.view[SETTER](index * BYTES + data.byteOffset, value, true);
-           };
+       var engineIsIeOrEdge = /MSIE|Trident/.test(UA);
 
-           var addElement = function (that, index) {
-             nativeDefineProperty(that, index, {
-               get: function () {
-                 return getter(this, index);
-               },
-               set: function (value) {
-                 return setter(this, index, value);
-               },
-               enumerable: true
-             });
-           };
+       var userAgent$2 = engineUserAgent;
 
-           if (!NATIVE_ARRAY_BUFFER_VIEWS) {
-             TypedArrayConstructor = wrapper(function (that, data, offset, $length) {
-               anInstance(that, TypedArrayConstructor, CONSTRUCTOR_NAME);
-               var index = 0;
-               var byteOffset = 0;
-               var buffer, byteLength, length;
-               if (!isObject(data)) {
-                 length = toIndex(data);
-                 byteLength = length * BYTES;
-                 buffer = new ArrayBuffer(byteLength);
-               } else if (isArrayBuffer(data)) {
-                 buffer = data;
-                 byteOffset = toOffset(offset, BYTES);
-                 var $len = data.byteLength;
-                 if ($length === undefined) {
-                   if ($len % BYTES) throw RangeError(WRONG_LENGTH);
-                   byteLength = $len - byteOffset;
-                   if (byteLength < 0) throw RangeError(WRONG_LENGTH);
-                 } else {
-                   byteLength = toLength($length) * BYTES;
-                   if (byteLength + byteOffset > $len) throw RangeError(WRONG_LENGTH);
-                 }
-                 length = byteLength / BYTES;
-               } else if (isTypedArray(data)) {
-                 return fromList(TypedArrayConstructor, data);
-               } else {
-                 return typedArrayFrom.call(TypedArrayConstructor, data);
-               }
-               setInternalState(that, {
-                 buffer: buffer,
-                 byteOffset: byteOffset,
-                 byteLength: byteLength,
-                 length: length,
-                 view: new DataView(buffer)
-               });
-               while (index < length) addElement(that, index++);
-             });
+       var webkit = userAgent$2.match(/AppleWebKit\/(\d+)\./);
 
-             if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
-             TypedArrayConstructorPrototype = TypedArrayConstructor.prototype = objectCreate(TypedArrayPrototype);
-           } else if (typedArrayConstructorsRequireWrappers) {
-             TypedArrayConstructor = wrapper(function (dummy, data, typedArrayOffset, $length) {
-               anInstance(dummy, TypedArrayConstructor, CONSTRUCTOR_NAME);
-               return inheritIfRequired(function () {
-                 if (!isObject(data)) return new NativeTypedArrayConstructor(toIndex(data));
-                 if (isArrayBuffer(data)) return $length !== undefined
-                   ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES), $length)
-                   : typedArrayOffset !== undefined
-                     ? new NativeTypedArrayConstructor(data, toOffset(typedArrayOffset, BYTES))
-                     : new NativeTypedArrayConstructor(data);
-                 if (isTypedArray(data)) return fromList(TypedArrayConstructor, data);
-                 return typedArrayFrom.call(TypedArrayConstructor, data);
-               }(), dummy, TypedArrayConstructor);
-             });
+       var engineWebkitVersion = !!webkit && +webkit[1];
 
-             if (objectSetPrototypeOf) objectSetPrototypeOf(TypedArrayConstructor, TypedArray);
-             forEach(getOwnPropertyNames(NativeTypedArrayConstructor), function (key) {
-               if (!(key in TypedArrayConstructor)) {
-                 createNonEnumerableProperty(TypedArrayConstructor, key, NativeTypedArrayConstructor[key]);
-               }
-             });
-             TypedArrayConstructor.prototype = TypedArrayConstructorPrototype;
-           }
+       var global$r = global$1m;
+       var uncurryThis$x = functionUncurryThis;
+       var fails$w = fails$S;
+       var aCallable$3 = aCallable$a;
+       var internalSort$1 = arraySort$1;
+       var ArrayBufferViewCore$2 = arrayBufferViewCore;
+       var FF$1 = engineFfVersion;
+       var IE_OR_EDGE$1 = engineIsIeOrEdge;
+       var V8$1 = engineV8Version;
+       var WEBKIT$1 = engineWebkitVersion;
 
-           if (TypedArrayConstructorPrototype.constructor !== TypedArrayConstructor) {
-             createNonEnumerableProperty(TypedArrayConstructorPrototype, 'constructor', TypedArrayConstructor);
-           }
+       var Array$3 = global$r.Array;
+       var aTypedArray$2 = ArrayBufferViewCore$2.aTypedArray;
+       var exportTypedArrayMethod$3 = ArrayBufferViewCore$2.exportTypedArrayMethod;
+       var Uint16Array = global$r.Uint16Array;
+       var un$Sort$1 = Uint16Array && uncurryThis$x(Uint16Array.prototype.sort);
 
-           if (TYPED_ARRAY_TAG) {
-             createNonEnumerableProperty(TypedArrayConstructorPrototype, TYPED_ARRAY_TAG, CONSTRUCTOR_NAME);
-           }
+       // WebKit
+       var ACCEPT_INCORRECT_ARGUMENTS = !!un$Sort$1 && !(fails$w(function () {
+         un$Sort$1(new Uint16Array(2), null);
+       }) && fails$w(function () {
+         un$Sort$1(new Uint16Array(2), {});
+       }));
 
-           exported[CONSTRUCTOR_NAME] = TypedArrayConstructor;
+       var STABLE_SORT$1 = !!un$Sort$1 && !fails$w(function () {
+         // feature detection can be too slow, so check engines versions
+         if (V8$1) return V8$1 < 74;
+         if (FF$1) return FF$1 < 67;
+         if (IE_OR_EDGE$1) return true;
+         if (WEBKIT$1) return WEBKIT$1 < 602;
 
-           _export({
-             global: true, forced: TypedArrayConstructor != NativeTypedArrayConstructor, sham: !NATIVE_ARRAY_BUFFER_VIEWS
-           }, exported);
+         var array = new Uint16Array(516);
+         var expected = Array$3(516);
+         var index, mod;
 
-           if (!(BYTES_PER_ELEMENT in TypedArrayConstructor)) {
-             createNonEnumerableProperty(TypedArrayConstructor, BYTES_PER_ELEMENT, BYTES);
-           }
+         for (index = 0; index < 516; index++) {
+           mod = index % 4;
+           array[index] = 515 - index;
+           expected[index] = index - 2 * mod + 3;
+         }
 
-           if (!(BYTES_PER_ELEMENT in TypedArrayConstructorPrototype)) {
-             createNonEnumerableProperty(TypedArrayConstructorPrototype, BYTES_PER_ELEMENT, BYTES);
-           }
+         un$Sort$1(array, function (a, b) {
+           return (a / 4 | 0) - (b / 4 | 0);
+         });
 
-           setSpecies(CONSTRUCTOR_NAME);
-         };
-       } else module.exports = function () { /* empty */ };
+         for (index = 0; index < 516; index++) {
+           if (array[index] !== expected[index]) return true;
+         }
        });
 
-       // `Uint8Array` constructor
-       // https://tc39.github.io/ecma262/#sec-typedarray-objects
-       typedArrayConstructor('Uint8', function (init) {
-         return function Uint8Array(data, byteOffset, length) {
-           return init(this, data, byteOffset, length);
+       var getSortCompare$1 = function (comparefn) {
+         return function (x, y) {
+           if (comparefn !== undefined) return +comparefn(x, y) || 0;
+           // eslint-disable-next-line no-self-compare -- NaN check
+           if (y !== y) return -1;
+           // eslint-disable-next-line no-self-compare -- NaN check
+           if (x !== x) return 1;
+           if (x === 0 && y === 0) return 1 / x > 0 && 1 / y < 0 ? 1 : -1;
+           return x > y;
          };
-       });
+       };
 
-       var min$4 = Math.min;
+       // `%TypedArray%.prototype.sort` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.sort
+       exportTypedArrayMethod$3('sort', function sort(comparefn) {
+         if (comparefn !== undefined) aCallable$3(comparefn);
+         if (STABLE_SORT$1) return un$Sort$1(this, comparefn);
 
-       // `Array.prototype.copyWithin` method implementation
-       // https://tc39.github.io/ecma262/#sec-array.prototype.copywithin
-       var arrayCopyWithin = [].copyWithin || function copyWithin(target /* = 0 */, start /* = 0, end = @length */) {
-         var O = toObject(this);
-         var len = toLength(O.length);
-         var to = toAbsoluteIndex(target, len);
-         var from = toAbsoluteIndex(start, len);
-         var end = arguments.length > 2 ? arguments[2] : undefined;
-         var count = min$4((end === undefined ? len : toAbsoluteIndex(end, len)) - from, len - to);
-         var inc = 1;
-         if (from < to && to < from + count) {
-           inc = -1;
-           from += count - 1;
-           to += count - 1;
-         }
-         while (count-- > 0) {
-           if (from in O) O[to] = O[from];
-           else delete O[to];
-           to += inc;
-           from += inc;
-         } return O;
-       };
+         return internalSort$1(aTypedArray$2(this), getSortCompare$1(comparefn));
+       }, !STABLE_SORT$1 || ACCEPT_INCORRECT_ARGUMENTS);
 
-       var aTypedArray$1 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$1 = arrayBufferViewCore.exportTypedArrayMethod;
+       var ArrayBufferViewCore$1 = arrayBufferViewCore;
+       var toLength$6 = toLength$c;
+       var toAbsoluteIndex$3 = toAbsoluteIndex$8;
+       var typedArraySpeciesConstructor = typedArraySpeciesConstructor$4;
 
-       // `%TypedArray%.prototype.copyWithin` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.copywithin
-       exportTypedArrayMethod$1('copyWithin', function copyWithin(target, start /* , end */) {
-         return arrayCopyWithin.call(aTypedArray$1(this), target, start, arguments.length > 2 ? arguments[2] : undefined);
-       });
-
-       var $every = arrayIteration.every;
-
-       var aTypedArray$2 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$2 = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.every` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.every
-       exportTypedArrayMethod$2('every', function every(callbackfn /* , thisArg */) {
-         return $every(aTypedArray$2(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-       });
-
-       var aTypedArray$3 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$3 = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.fill` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.fill
-       // eslint-disable-next-line no-unused-vars
-       exportTypedArrayMethod$3('fill', function fill(value /* , start, end */) {
-         return arrayFill.apply(aTypedArray$3(this), arguments);
-       });
-
-       var $filter = arrayIteration.filter;
-
-
-       var aTypedArray$4 = arrayBufferViewCore.aTypedArray;
-       var aTypedArrayConstructor$2 = arrayBufferViewCore.aTypedArrayConstructor;
-       var exportTypedArrayMethod$4 = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.filter` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.filter
-       exportTypedArrayMethod$4('filter', function filter(callbackfn /* , thisArg */) {
-         var list = $filter(aTypedArray$4(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-         var C = speciesConstructor(this, this.constructor);
-         var index = 0;
-         var length = list.length;
-         var result = new (aTypedArrayConstructor$2(C))(length);
-         while (length > index) result[index] = list[index++];
-         return result;
-       });
-
-       var $find = arrayIteration.find;
-
-       var aTypedArray$5 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$5 = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.find` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.find
-       exportTypedArrayMethod$5('find', function find(predicate /* , thisArg */) {
-         return $find(aTypedArray$5(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
-       });
-
-       var $findIndex = arrayIteration.findIndex;
-
-       var aTypedArray$6 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$6 = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.findIndex` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.findindex
-       exportTypedArrayMethod$6('findIndex', function findIndex(predicate /* , thisArg */) {
-         return $findIndex(aTypedArray$6(this), predicate, arguments.length > 1 ? arguments[1] : undefined);
-       });
-
-       var $forEach$2 = arrayIteration.forEach;
-
-       var aTypedArray$7 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$7 = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.forEach` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.foreach
-       exportTypedArrayMethod$7('forEach', function forEach(callbackfn /* , thisArg */) {
-         $forEach$2(aTypedArray$7(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-       });
-
-       var $includes = arrayIncludes.includes;
-
-       var aTypedArray$8 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$8 = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.includes` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.includes
-       exportTypedArrayMethod$8('includes', function includes(searchElement /* , fromIndex */) {
-         return $includes(aTypedArray$8(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
-       });
-
-       var $indexOf$1 = arrayIncludes.indexOf;
-
-       var aTypedArray$9 = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$9 = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.indexOf` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.indexof
-       exportTypedArrayMethod$9('indexOf', function indexOf(searchElement /* , fromIndex */) {
-         return $indexOf$1(aTypedArray$9(this), searchElement, arguments.length > 1 ? arguments[1] : undefined);
-       });
-
-       var ITERATOR$5 = wellKnownSymbol('iterator');
-       var Uint8Array$1 = global_1.Uint8Array;
-       var arrayValues = es_array_iterator.values;
-       var arrayKeys = es_array_iterator.keys;
-       var arrayEntries = es_array_iterator.entries;
-       var aTypedArray$a = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$a = arrayBufferViewCore.exportTypedArrayMethod;
-       var nativeTypedArrayIterator = Uint8Array$1 && Uint8Array$1.prototype[ITERATOR$5];
-
-       var CORRECT_ITER_NAME = !!nativeTypedArrayIterator
-         && (nativeTypedArrayIterator.name == 'values' || nativeTypedArrayIterator.name == undefined);
-
-       var typedArrayValues = function values() {
-         return arrayValues.call(aTypedArray$a(this));
-       };
-
-       // `%TypedArray%.prototype.entries` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.entries
-       exportTypedArrayMethod$a('entries', function entries() {
-         return arrayEntries.call(aTypedArray$a(this));
-       });
-       // `%TypedArray%.prototype.keys` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.keys
-       exportTypedArrayMethod$a('keys', function keys() {
-         return arrayKeys.call(aTypedArray$a(this));
-       });
-       // `%TypedArray%.prototype.values` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.values
-       exportTypedArrayMethod$a('values', typedArrayValues, !CORRECT_ITER_NAME);
-       // `%TypedArray%.prototype[@@iterator]` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype-@@iterator
-       exportTypedArrayMethod$a(ITERATOR$5, typedArrayValues, !CORRECT_ITER_NAME);
-
-       var aTypedArray$b = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$b = arrayBufferViewCore.exportTypedArrayMethod;
-       var $join = [].join;
-
-       // `%TypedArray%.prototype.join` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.join
-       // eslint-disable-next-line no-unused-vars
-       exportTypedArrayMethod$b('join', function join(separator) {
-         return $join.apply(aTypedArray$b(this), arguments);
-       });
-
-       var min$5 = Math.min;
-       var nativeLastIndexOf = [].lastIndexOf;
-       var NEGATIVE_ZERO$1 = !!nativeLastIndexOf && 1 / [1].lastIndexOf(1, -0) < 0;
-       var STRICT_METHOD$3 = arrayMethodIsStrict('lastIndexOf');
-       // For preventing possible almost infinite loop in non-standard implementations, test the forward version of the method
-       var USES_TO_LENGTH$4 = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
-       var FORCED$1 = NEGATIVE_ZERO$1 || !STRICT_METHOD$3 || !USES_TO_LENGTH$4;
-
-       // `Array.prototype.lastIndexOf` method implementation
-       // https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof
-       var arrayLastIndexOf = FORCED$1 ? function lastIndexOf(searchElement /* , fromIndex = @[*-1] */) {
-         // convert -0 to +0
-         if (NEGATIVE_ZERO$1) return nativeLastIndexOf.apply(this, arguments) || 0;
-         var O = toIndexedObject(this);
-         var length = toLength(O.length);
-         var index = length - 1;
-         if (arguments.length > 1) index = min$5(index, toInteger(arguments[1]));
-         if (index < 0) index = length + index;
-         for (;index >= 0; index--) if (index in O && O[index] === searchElement) return index || 0;
-         return -1;
-       } : nativeLastIndexOf;
-
-       var aTypedArray$c = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$c = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.lastIndexOf` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.lastindexof
-       // eslint-disable-next-line no-unused-vars
-       exportTypedArrayMethod$c('lastIndexOf', function lastIndexOf(searchElement /* , fromIndex */) {
-         return arrayLastIndexOf.apply(aTypedArray$c(this), arguments);
-       });
-
-       var $map$1 = arrayIteration.map;
-
-
-       var aTypedArray$d = arrayBufferViewCore.aTypedArray;
-       var aTypedArrayConstructor$3 = arrayBufferViewCore.aTypedArrayConstructor;
-       var exportTypedArrayMethod$d = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.map` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.map
-       exportTypedArrayMethod$d('map', function map(mapfn /* , thisArg */) {
-         return $map$1(aTypedArray$d(this), mapfn, arguments.length > 1 ? arguments[1] : undefined, function (O, length) {
-           return new (aTypedArrayConstructor$3(speciesConstructor(O, O.constructor)))(length);
-         });
-       });
-
-       // `Array.prototype.{ reduce, reduceRight }` methods implementation
-       var createMethod$4 = function (IS_RIGHT) {
-         return function (that, callbackfn, argumentsLength, memo) {
-           aFunction$1(callbackfn);
-           var O = toObject(that);
-           var self = indexedObject(O);
-           var length = toLength(O.length);
-           var index = IS_RIGHT ? length - 1 : 0;
-           var i = IS_RIGHT ? -1 : 1;
-           if (argumentsLength < 2) while (true) {
-             if (index in self) {
-               memo = self[index];
-               index += i;
-               break;
-             }
-             index += i;
-             if (IS_RIGHT ? index < 0 : length <= index) {
-               throw TypeError('Reduce of empty array with no initial value');
-             }
-           }
-           for (;IS_RIGHT ? index >= 0 : length > index; index += i) if (index in self) {
-             memo = callbackfn(memo, self[index], index, O);
-           }
-           return memo;
-         };
-       };
-
-       var arrayReduce = {
-         // `Array.prototype.reduce` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.reduce
-         left: createMethod$4(false),
-         // `Array.prototype.reduceRight` method
-         // https://tc39.github.io/ecma262/#sec-array.prototype.reduceright
-         right: createMethod$4(true)
-       };
-
-       var $reduce = arrayReduce.left;
-
-       var aTypedArray$e = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$e = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.reduce` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduce
-       exportTypedArrayMethod$e('reduce', function reduce(callbackfn /* , initialValue */) {
-         return $reduce(aTypedArray$e(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
-       });
-
-       var $reduceRight = arrayReduce.right;
-
-       var aTypedArray$f = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$f = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.reduceRicht` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reduceright
-       exportTypedArrayMethod$f('reduceRight', function reduceRight(callbackfn /* , initialValue */) {
-         return $reduceRight(aTypedArray$f(this), callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
-       });
-
-       var aTypedArray$g = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$g = arrayBufferViewCore.exportTypedArrayMethod;
-       var floor$3 = Math.floor;
-
-       // `%TypedArray%.prototype.reverse` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.reverse
-       exportTypedArrayMethod$g('reverse', function reverse() {
-         var that = this;
-         var length = aTypedArray$g(that).length;
-         var middle = floor$3(length / 2);
-         var index = 0;
-         var value;
-         while (index < middle) {
-           value = that[index];
-           that[index++] = that[--length];
-           that[length] = value;
-         } return that;
-       });
-
-       var aTypedArray$h = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$h = arrayBufferViewCore.exportTypedArrayMethod;
-
-       var FORCED$2 = fails(function () {
-         // eslint-disable-next-line no-undef
-         new Int8Array(1).set({});
-       });
-
-       // `%TypedArray%.prototype.set` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.set
-       exportTypedArrayMethod$h('set', function set(arrayLike /* , offset */) {
-         aTypedArray$h(this);
-         var offset = toOffset(arguments.length > 1 ? arguments[1] : undefined, 1);
-         var length = this.length;
-         var src = toObject(arrayLike);
-         var len = toLength(src.length);
-         var index = 0;
-         if (len + offset > length) throw RangeError('Wrong length');
-         while (index < len) this[offset + index] = src[index++];
-       }, FORCED$2);
-
-       var aTypedArray$i = arrayBufferViewCore.aTypedArray;
-       var aTypedArrayConstructor$4 = arrayBufferViewCore.aTypedArrayConstructor;
-       var exportTypedArrayMethod$i = arrayBufferViewCore.exportTypedArrayMethod;
-       var $slice = [].slice;
-
-       var FORCED$3 = fails(function () {
-         // eslint-disable-next-line no-undef
-         new Int8Array(1).slice();
-       });
-
-       // `%TypedArray%.prototype.slice` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.slice
-       exportTypedArrayMethod$i('slice', function slice(start, end) {
-         var list = $slice.call(aTypedArray$i(this), start, end);
-         var C = speciesConstructor(this, this.constructor);
-         var index = 0;
-         var length = list.length;
-         var result = new (aTypedArrayConstructor$4(C))(length);
-         while (length > index) result[index] = list[index++];
-         return result;
-       }, FORCED$3);
-
-       var $some = arrayIteration.some;
-
-       var aTypedArray$j = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$j = arrayBufferViewCore.exportTypedArrayMethod;
-
-       // `%TypedArray%.prototype.some` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.some
-       exportTypedArrayMethod$j('some', function some(callbackfn /* , thisArg */) {
-         return $some(aTypedArray$j(this), callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-       });
-
-       var aTypedArray$k = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$k = arrayBufferViewCore.exportTypedArrayMethod;
-       var $sort = [].sort;
-
-       // `%TypedArray%.prototype.sort` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.sort
-       exportTypedArrayMethod$k('sort', function sort(comparefn) {
-         return $sort.call(aTypedArray$k(this), comparefn);
-       });
-
-       var aTypedArray$l = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$l = arrayBufferViewCore.exportTypedArrayMethod;
+       var aTypedArray$1 = ArrayBufferViewCore$1.aTypedArray;
+       var exportTypedArrayMethod$2 = ArrayBufferViewCore$1.exportTypedArrayMethod;
 
        // `%TypedArray%.prototype.subarray` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.subarray
-       exportTypedArrayMethod$l('subarray', function subarray(begin, end) {
-         var O = aTypedArray$l(this);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.subarray
+       exportTypedArrayMethod$2('subarray', function subarray(begin, end) {
+         var O = aTypedArray$1(this);
          var length = O.length;
-         var beginIndex = toAbsoluteIndex(begin, length);
-         return new (speciesConstructor(O, O.constructor))(
+         var beginIndex = toAbsoluteIndex$3(begin, length);
+         var C = typedArraySpeciesConstructor(O);
+         return new C(
            O.buffer,
            O.byteOffset + beginIndex * O.BYTES_PER_ELEMENT,
-           toLength((end === undefined ? length : toAbsoluteIndex(end, length)) - beginIndex)
+           toLength$6((end === undefined ? length : toAbsoluteIndex$3(end, length)) - beginIndex)
          );
        });
 
-       var Int8Array$3 = global_1.Int8Array;
-       var aTypedArray$m = arrayBufferViewCore.aTypedArray;
-       var exportTypedArrayMethod$m = arrayBufferViewCore.exportTypedArrayMethod;
+       var global$q = global$1m;
+       var apply$4 = functionApply;
+       var ArrayBufferViewCore = arrayBufferViewCore;
+       var fails$v = fails$S;
+       var arraySlice$5 = arraySlice$c;
+
+       var Int8Array$1 = global$q.Int8Array;
+       var aTypedArray = ArrayBufferViewCore.aTypedArray;
+       var exportTypedArrayMethod$1 = ArrayBufferViewCore.exportTypedArrayMethod;
        var $toLocaleString = [].toLocaleString;
-       var $slice$1 = [].slice;
 
        // iOS Safari 6.x fails here
-       var TO_LOCALE_STRING_BUG = !!Int8Array$3 && fails(function () {
-         $toLocaleString.call(new Int8Array$3(1));
+       var TO_LOCALE_STRING_BUG = !!Int8Array$1 && fails$v(function () {
+         $toLocaleString.call(new Int8Array$1(1));
        });
 
-       var FORCED$4 = fails(function () {
-         return [1, 2].toLocaleString() != new Int8Array$3([1, 2]).toLocaleString();
-       }) || !fails(function () {
-         Int8Array$3.prototype.toLocaleString.call([1, 2]);
+       var FORCED$d = fails$v(function () {
+         return [1, 2].toLocaleString() != new Int8Array$1([1, 2]).toLocaleString();
+       }) || !fails$v(function () {
+         Int8Array$1.prototype.toLocaleString.call([1, 2]);
        });
 
        // `%TypedArray%.prototype.toLocaleString` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tolocalestring
-       exportTypedArrayMethod$m('toLocaleString', function toLocaleString() {
-         return $toLocaleString.apply(TO_LOCALE_STRING_BUG ? $slice$1.call(aTypedArray$m(this)) : aTypedArray$m(this), arguments);
-       }, FORCED$4);
-
-       var exportTypedArrayMethod$n = arrayBufferViewCore.exportTypedArrayMethod;
-
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.tolocalestring
+       exportTypedArrayMethod$1('toLocaleString', function toLocaleString() {
+         return apply$4(
+           $toLocaleString,
+           TO_LOCALE_STRING_BUG ? arraySlice$5(aTypedArray(this)) : aTypedArray(this),
+           arraySlice$5(arguments)
+         );
+       }, FORCED$d);
 
+       var exportTypedArrayMethod = arrayBufferViewCore.exportTypedArrayMethod;
+       var fails$u = fails$S;
+       var global$p = global$1m;
+       var uncurryThis$w = functionUncurryThis;
 
-       var Uint8Array$2 = global_1.Uint8Array;
-       var Uint8ArrayPrototype = Uint8Array$2 && Uint8Array$2.prototype || {};
+       var Uint8Array$1 = global$p.Uint8Array;
+       var Uint8ArrayPrototype = Uint8Array$1 && Uint8Array$1.prototype || {};
        var arrayToString = [].toString;
-       var arrayJoin = [].join;
+       var join$5 = uncurryThis$w([].join);
 
-       if (fails(function () { arrayToString.call({}); })) {
+       if (fails$u(function () { arrayToString.call({}); })) {
          arrayToString = function toString() {
-           return arrayJoin.call(this);
+           return join$5(this);
          };
        }
 
        var IS_NOT_ARRAY_METHOD = Uint8ArrayPrototype.toString != arrayToString;
 
        // `%TypedArray%.prototype.toString` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.prototype.tostring
-       exportTypedArrayMethod$n('toString', arrayToString, IS_NOT_ARRAY_METHOD);
+       // https://tc39.es/ecma262/#sec-%typedarray%.prototype.tostring
+       exportTypedArrayMethod('toString', arrayToString, IS_NOT_ARRAY_METHOD);
 
-       // iterable DOM collections
-       // flag - `iterable` interface - 'entries', 'keys', 'values', 'forEach' methods
-       var domIterables = {
-         CSSRuleList: 0,
-         CSSStyleDeclaration: 0,
-         CSSValueList: 0,
-         ClientRectList: 0,
-         DOMRectList: 0,
-         DOMStringList: 0,
-         DOMTokenList: 1,
-         DataTransferItemList: 0,
-         FileList: 0,
-         HTMLAllCollection: 0,
-         HTMLCollection: 0,
-         HTMLFormElement: 0,
-         HTMLSelectElement: 0,
-         MediaList: 0,
-         MimeTypeArray: 0,
-         NamedNodeMap: 0,
-         NodeList: 1,
-         PaintRequestList: 0,
-         Plugin: 0,
-         PluginArray: 0,
-         SVGLengthList: 0,
-         SVGNumberList: 0,
-         SVGPathSegList: 0,
-         SVGPointList: 0,
-         SVGStringList: 0,
-         SVGTransformList: 0,
-         SourceBufferList: 0,
-         StyleSheetList: 0,
-         TextTrackCueList: 0,
-         TextTrackList: 0,
-         TouchList: 0
-       };
+       var $$Z = _export;
+       var uncurryThis$v = functionUncurryThis;
+       var IndexedObject$1 = indexedObject;
+       var toIndexedObject$3 = toIndexedObject$c;
+       var arrayMethodIsStrict$5 = arrayMethodIsStrict$9;
 
-       for (var COLLECTION_NAME in domIterables) {
-         var Collection = global_1[COLLECTION_NAME];
-         var CollectionPrototype = Collection && Collection.prototype;
-         // some Chrome versions have non-configurable methods on DOMTokenList
-         if (CollectionPrototype && CollectionPrototype.forEach !== arrayForEach) try {
-           createNonEnumerableProperty(CollectionPrototype, 'forEach', arrayForEach);
-         } catch (error) {
-           CollectionPrototype.forEach = arrayForEach;
-         }
-       }
+       var un$Join = uncurryThis$v([].join);
 
-       var ITERATOR$6 = wellKnownSymbol('iterator');
-       var TO_STRING_TAG$4 = wellKnownSymbol('toStringTag');
-       var ArrayValues = es_array_iterator.values;
+       var ES3_STRINGS = IndexedObject$1 != Object;
+       var STRICT_METHOD$5 = arrayMethodIsStrict$5('join', ',');
 
-       for (var COLLECTION_NAME$1 in domIterables) {
-         var Collection$1 = global_1[COLLECTION_NAME$1];
-         var CollectionPrototype$1 = Collection$1 && Collection$1.prototype;
-         if (CollectionPrototype$1) {
-           // some Chrome versions have non-configurable methods on DOMTokenList
-           if (CollectionPrototype$1[ITERATOR$6] !== ArrayValues) try {
-             createNonEnumerableProperty(CollectionPrototype$1, ITERATOR$6, ArrayValues);
-           } catch (error) {
-             CollectionPrototype$1[ITERATOR$6] = ArrayValues;
-           }
-           if (!CollectionPrototype$1[TO_STRING_TAG$4]) {
-             createNonEnumerableProperty(CollectionPrototype$1, TO_STRING_TAG$4, COLLECTION_NAME$1);
-           }
-           if (domIterables[COLLECTION_NAME$1]) for (var METHOD_NAME in es_array_iterator) {
-             // some Chrome versions have non-configurable methods on DOMTokenList
-             if (CollectionPrototype$1[METHOD_NAME] !== es_array_iterator[METHOD_NAME]) try {
-               createNonEnumerableProperty(CollectionPrototype$1, METHOD_NAME, es_array_iterator[METHOD_NAME]);
-             } catch (error) {
-               CollectionPrototype$1[METHOD_NAME] = es_array_iterator[METHOD_NAME];
-             }
-           }
+       // `Array.prototype.join` method
+       // https://tc39.es/ecma262/#sec-array.prototype.join
+       $$Z({ target: 'Array', proto: true, forced: ES3_STRINGS || !STRICT_METHOD$5 }, {
+         join: function join(separator) {
+           return un$Join(toIndexedObject$3(this), separator === undefined ? ',' : separator);
          }
-       }
+       });
 
-       var slice = [].slice;
-       var MSIE = /MSIE .\./.test(engineUserAgent); // <- dirty ie9- check
+       var toPropertyKey = toPropertyKey$5;
+       var definePropertyModule = objectDefineProperty;
+       var createPropertyDescriptor$1 = createPropertyDescriptor$7;
 
-       var wrap$1 = function (scheduler) {
-         return function (handler, timeout /* , ...arguments */) {
-           var boundArgs = arguments.length > 2;
-           var args = boundArgs ? slice.call(arguments, 2) : undefined;
-           return scheduler(boundArgs ? function () {
-             // eslint-disable-next-line no-new-func
-             (typeof handler == 'function' ? handler : Function(handler)).apply(this, args);
-           } : handler, timeout);
-         };
+       var createProperty$4 = function (object, key, value) {
+         var propertyKey = toPropertyKey(key);
+         if (propertyKey in object) definePropertyModule.f(object, propertyKey, createPropertyDescriptor$1(0, value));
+         else object[propertyKey] = value;
        };
 
-       // ie9- setTimeout & setInterval additional parameters fix
-       // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
-       _export({ global: true, bind: true, forced: MSIE }, {
-         // `setTimeout` method
-         // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-settimeout
-         setTimeout: wrap$1(global_1.setTimeout),
-         // `setInterval` method
-         // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
-         setInterval: wrap$1(global_1.setInterval)
+       var $$Y = _export;
+       var global$o = global$1m;
+       var isArray$4 = isArray$8;
+       var isConstructor$1 = isConstructor$4;
+       var isObject$e = isObject$s;
+       var toAbsoluteIndex$2 = toAbsoluteIndex$8;
+       var lengthOfArrayLike$6 = lengthOfArrayLike$g;
+       var toIndexedObject$2 = toIndexedObject$c;
+       var createProperty$3 = createProperty$4;
+       var wellKnownSymbol$8 = wellKnownSymbol$t;
+       var arrayMethodHasSpeciesSupport$3 = arrayMethodHasSpeciesSupport$5;
+       var un$Slice = arraySlice$c;
+
+       var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport$3('slice');
+
+       var SPECIES$1 = wellKnownSymbol$8('species');
+       var Array$2 = global$o.Array;
+       var max$3 = Math.max;
+
+       // `Array.prototype.slice` method
+       // https://tc39.es/ecma262/#sec-array.prototype.slice
+       // fallback for not array-like ES3 strings and DOM objects
+       $$Y({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 }, {
+         slice: function slice(start, end) {
+           var O = toIndexedObject$2(this);
+           var length = lengthOfArrayLike$6(O);
+           var k = toAbsoluteIndex$2(start, length);
+           var fin = toAbsoluteIndex$2(end === undefined ? length : end, length);
+           // inline `ArraySpeciesCreate` for usage native `Array#slice` where it's possible
+           var Constructor, result, n;
+           if (isArray$4(O)) {
+             Constructor = O.constructor;
+             // cross-realm fallback
+             if (isConstructor$1(Constructor) && (Constructor === Array$2 || isArray$4(Constructor.prototype))) {
+               Constructor = undefined;
+             } else if (isObject$e(Constructor)) {
+               Constructor = Constructor[SPECIES$1];
+               if (Constructor === null) Constructor = undefined;
+             }
+             if (Constructor === Array$2 || Constructor === undefined) {
+               return un$Slice(O, k, fin);
+             }
+           }
+           result = new (Constructor === undefined ? Array$2 : Constructor)(max$3(fin - k, 0));
+           for (n = 0; k < fin; k++, n++) if (k in O) createProperty$3(result, n, O[k]);
+           result.length = n;
+           return result;
+         }
        });
 
-       var ITERATOR$7 = wellKnownSymbol('iterator');
+       var fails$t = fails$S;
+       var wellKnownSymbol$7 = wellKnownSymbol$t;
+       var IS_PURE = isPure;
 
-       var nativeUrl = !fails(function () {
+       var ITERATOR$3 = wellKnownSymbol$7('iterator');
+
+       var nativeUrl = !fails$t(function () {
          var url = new URL('b?a=1&b=2&c=3', 'http://a');
          var searchParams = url.searchParams;
          var result = '';
            searchParams['delete']('b');
            result += key + value;
          });
-         return (isPure && !url.toJSON)
+         return (IS_PURE && !url.toJSON)
            || !searchParams.sort
            || url.href !== 'http://a/c%20d?a=1&c=3'
            || searchParams.get('c') !== '3'
            || String(new URLSearchParams('?a=1')) !== 'a=1'
-           || !searchParams[ITERATOR$7]
+           || !searchParams[ITERATOR$3]
            // throws in Edge
            || new URL('https://a@b').username !== 'a'
            || new URLSearchParams(new URLSearchParams('a=b')).get('a') !== 'b'
            || new URL('http://x', undefined).host !== 'x';
        });
 
-       var nativeAssign = Object.assign;
-       var defineProperty$7 = Object.defineProperty;
-
-       // `Object.assign` method
-       // https://tc39.github.io/ecma262/#sec-object.assign
-       var objectAssign = !nativeAssign || fails(function () {
-         // should have correct order of operations (Edge bug)
-         if (descriptors && nativeAssign({ b: 1 }, nativeAssign(defineProperty$7({}, 'a', {
-           enumerable: true,
-           get: function () {
-             defineProperty$7(this, 'b', {
-               value: 3,
-               enumerable: false
-             });
-           }
-         }), { b: 2 })).b !== 1) return true;
-         // should work with symbols and should have deterministic property order (V8 bug)
-         var A = {};
-         var B = {};
-         // eslint-disable-next-line no-undef
-         var symbol = Symbol();
-         var alphabet = 'abcdefghijklmnopqrst';
-         A[symbol] = 7;
-         alphabet.split('').forEach(function (chr) { B[chr] = chr; });
-         return nativeAssign({}, A)[symbol] != 7 || objectKeys(nativeAssign({}, B)).join('') != alphabet;
-       }) ? function assign(target, source) { // eslint-disable-line no-unused-vars
-         var T = toObject(target);
-         var argumentsLength = arguments.length;
-         var index = 1;
-         var getOwnPropertySymbols = objectGetOwnPropertySymbols.f;
-         var propertyIsEnumerable = objectPropertyIsEnumerable.f;
-         while (argumentsLength > index) {
-           var S = indexedObject(arguments[index++]);
-           var keys = getOwnPropertySymbols ? objectKeys(S).concat(getOwnPropertySymbols(S)) : objectKeys(S);
-           var length = keys.length;
-           var j = 0;
-           var key;
-           while (length > j) {
-             key = keys[j++];
-             if (!descriptors || propertyIsEnumerable.call(S, key)) T[key] = S[key];
-           }
-         } return T;
-       } : nativeAssign;
-
-       // `Array.from` method implementation
-       // https://tc39.github.io/ecma262/#sec-array.from
-       var arrayFrom = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
-         var O = toObject(arrayLike);
-         var C = typeof this == 'function' ? this : Array;
-         var argumentsLength = arguments.length;
-         var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
-         var mapping = mapfn !== undefined;
-         var iteratorMethod = getIteratorMethod(O);
-         var index = 0;
-         var length, result, step, iterator, next, value;
-         if (mapping) mapfn = functionBindContext(mapfn, argumentsLength > 2 ? arguments[2] : undefined, 2);
-         // if the target is not iterable or it's an array with the default iterator - use a simple case
-         if (iteratorMethod != undefined && !(C == Array && isArrayIteratorMethod(iteratorMethod))) {
-           iterator = iteratorMethod.call(O);
-           next = iterator.next;
-           result = new C();
-           for (;!(step = next.call(iterator)).done; index++) {
-             value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;
-             createProperty(result, index, value);
-           }
-         } else {
-           length = toLength(O.length);
-           result = new C(length);
-           for (;length > index; index++) {
-             value = mapping ? mapfn(O[index], index) : O[index];
-             createProperty(result, index, value);
-           }
-         }
-         result.length = index;
-         return result;
-       };
-
-       // based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js
-       var maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1
-       var base = 36;
-       var tMin = 1;
-       var tMax = 26;
-       var skew = 38;
-       var damp = 700;
-       var initialBias = 72;
-       var initialN = 128; // 0x80
-       var delimiter = '-'; // '\x2D'
-       var regexNonASCII = /[^\0-\u007E]/; // non-ASCII chars
-       var regexSeparators = /[.\u3002\uFF0E\uFF61]/g; // RFC 3490 separators
-       var OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';
-       var baseMinusTMin = base - tMin;
-       var floor$4 = Math.floor;
-       var stringFromCharCode = String.fromCharCode;
-
-       /**
-        * Creates an array containing the numeric code points of each Unicode
-        * character in the string. While JavaScript uses UCS-2 internally,
-        * this function will convert a pair of surrogate halves (each of which
-        * UCS-2 exposes as separate characters) into a single code point,
-        * matching UTF-16.
-        */
-       var ucs2decode = function (string) {
-         var output = [];
-         var counter = 0;
-         var length = string.length;
-         while (counter < length) {
-           var value = string.charCodeAt(counter++);
-           if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
-             // It's a high surrogate, and there is a next character.
-             var extra = string.charCodeAt(counter++);
-             if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.
-               output.push(((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
-             } else {
-               // It's an unmatched surrogate; only append this code unit, in case the
-               // next code unit is the high surrogate of a surrogate pair.
-               output.push(value);
-               counter--;
-             }
-           } else {
-             output.push(value);
-           }
-         }
-         return output;
-       };
-
-       /**
-        * Converts a digit/integer into a basic code point.
-        */
-       var digitToBasic = function (digit) {
-         //  0..25 map to ASCII a..z or A..Z
-         // 26..35 map to ASCII 0..9
-         return digit + 22 + 75 * (digit < 26);
-       };
-
-       /**
-        * Bias adaptation function as per section 3.4 of RFC 3492.
-        * https://tools.ietf.org/html/rfc3492#section-3.4
-        */
-       var adapt = function (delta, numPoints, firstTime) {
-         var k = 0;
-         delta = firstTime ? floor$4(delta / damp) : delta >> 1;
-         delta += floor$4(delta / numPoints);
-         for (; delta > baseMinusTMin * tMax >> 1; k += base) {
-           delta = floor$4(delta / baseMinusTMin);
-         }
-         return floor$4(k + (baseMinusTMin + 1) * delta / (delta + skew));
-       };
-
-       /**
-        * Converts a string of Unicode symbols (e.g. a domain name label) to a
-        * Punycode string of ASCII-only symbols.
-        */
-       // eslint-disable-next-line  max-statements
-       var encode = function (input) {
-         var output = [];
-
-         // Convert the input in UCS-2 to an array of Unicode code points.
-         input = ucs2decode(input);
-
-         // Cache the length.
-         var inputLength = input.length;
-
-         // Initialize the state.
-         var n = initialN;
-         var delta = 0;
-         var bias = initialBias;
-         var i, currentValue;
-
-         // Handle the basic code points.
-         for (i = 0; i < input.length; i++) {
-           currentValue = input[i];
-           if (currentValue < 0x80) {
-             output.push(stringFromCharCode(currentValue));
-           }
-         }
-
-         var basicLength = output.length; // number of basic code points.
-         var handledCPCount = basicLength; // number of code points that have been handled;
-
-         // Finish the basic string with a delimiter unless it's empty.
-         if (basicLength) {
-           output.push(delimiter);
-         }
-
-         // Main encoding loop:
-         while (handledCPCount < inputLength) {
-           // All non-basic code points < n have been handled already. Find the next larger one:
-           var m = maxInt;
-           for (i = 0; i < input.length; i++) {
-             currentValue = input[i];
-             if (currentValue >= n && currentValue < m) {
-               m = currentValue;
-             }
-           }
-
-           // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.
-           var handledCPCountPlusOne = handledCPCount + 1;
-           if (m - n > floor$4((maxInt - delta) / handledCPCountPlusOne)) {
-             throw RangeError(OVERFLOW_ERROR);
-           }
-
-           delta += (m - n) * handledCPCountPlusOne;
-           n = m;
-
-           for (i = 0; i < input.length; i++) {
-             currentValue = input[i];
-             if (currentValue < n && ++delta > maxInt) {
-               throw RangeError(OVERFLOW_ERROR);
-             }
-             if (currentValue == n) {
-               // Represent delta as a generalized variable-length integer.
-               var q = delta;
-               for (var k = base; /* no condition */; k += base) {
-                 var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
-                 if (q < t) break;
-                 var qMinusT = q - t;
-                 var baseMinusT = base - t;
-                 output.push(stringFromCharCode(digitToBasic(t + qMinusT % baseMinusT)));
-                 q = floor$4(qMinusT / baseMinusT);
-               }
-
-               output.push(stringFromCharCode(digitToBasic(q)));
-               bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
-               delta = 0;
-               ++handledCPCount;
-             }
-           }
-
-           ++delta;
-           ++n;
-         }
-         return output.join('');
-       };
-
-       var stringPunycodeToAscii = function (input) {
-         var encoded = [];
-         var labels = input.toLowerCase().replace(regexSeparators, '\u002E').split('.');
-         var i, label;
-         for (i = 0; i < labels.length; i++) {
-           label = labels[i];
-           encoded.push(regexNonASCII.test(label) ? 'xn--' + encode(label) : label);
-         }
-         return encoded.join('.');
-       };
-
-       var getIterator = function (it) {
-         var iteratorMethod = getIteratorMethod(it);
-         if (typeof iteratorMethod != 'function') {
-           throw TypeError(String(it) + ' is not iterable');
-         } return anObject(iteratorMethod.call(it));
-       };
-
        // TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
 
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-       var $fetch$1 = getBuiltIn('fetch');
-       var Headers = getBuiltIn('Headers');
-       var ITERATOR$8 = wellKnownSymbol('iterator');
+       var $$X = _export;
+       var global$n = global$1m;
+       var getBuiltIn$2 = getBuiltIn$b;
+       var call$a = functionCall;
+       var uncurryThis$u = functionUncurryThis;
+       var USE_NATIVE_URL$1 = nativeUrl;
+       var redefine$7 = redefine$h.exports;
+       var redefineAll$1 = redefineAll$4;
+       var setToStringTag$4 = setToStringTag$a;
+       var createIteratorConstructor = createIteratorConstructor$2;
+       var InternalStateModule$2 = internalState;
+       var anInstance$3 = anInstance$7;
+       var isCallable$5 = isCallable$r;
+       var hasOwn$6 = hasOwnProperty_1;
+       var bind$8 = functionBindContext;
+       var classof$3 = classof$d;
+       var anObject$9 = anObject$n;
+       var isObject$d = isObject$s;
+       var $toString$2 = toString$k;
+       var create$6 = objectCreate;
+       var createPropertyDescriptor = createPropertyDescriptor$7;
+       var getIterator$1 = getIterator$4;
+       var getIteratorMethod$1 = getIteratorMethod$5;
+       var wellKnownSymbol$6 = wellKnownSymbol$t;
+       var arraySort = arraySort$1;
+
+       var ITERATOR$2 = wellKnownSymbol$6('iterator');
        var URL_SEARCH_PARAMS = 'URLSearchParams';
        var URL_SEARCH_PARAMS_ITERATOR = URL_SEARCH_PARAMS + 'Iterator';
-       var setInternalState$5 = internalState.set;
-       var getInternalParamsState = internalState.getterFor(URL_SEARCH_PARAMS);
-       var getInternalIteratorState = internalState.getterFor(URL_SEARCH_PARAMS_ITERATOR);
+       var setInternalState$2 = InternalStateModule$2.set;
+       var getInternalParamsState = InternalStateModule$2.getterFor(URL_SEARCH_PARAMS);
+       var getInternalIteratorState = InternalStateModule$2.getterFor(URL_SEARCH_PARAMS_ITERATOR);
+
+       var n$Fetch = getBuiltIn$2('fetch');
+       var N$Request = getBuiltIn$2('Request');
+       var Headers$1 = getBuiltIn$2('Headers');
+       var RequestPrototype = N$Request && N$Request.prototype;
+       var HeadersPrototype = Headers$1 && Headers$1.prototype;
+       var RegExp$1 = global$n.RegExp;
+       var TypeError$8 = global$n.TypeError;
+       var decodeURIComponent$1 = global$n.decodeURIComponent;
+       var encodeURIComponent$1 = global$n.encodeURIComponent;
+       var charAt$5 = uncurryThis$u(''.charAt);
+       var join$4 = uncurryThis$u([].join);
+       var push$7 = uncurryThis$u([].push);
+       var replace$6 = uncurryThis$u(''.replace);
+       var shift$1 = uncurryThis$u([].shift);
+       var splice = uncurryThis$u([].splice);
+       var split$3 = uncurryThis$u(''.split);
+       var stringSlice$8 = uncurryThis$u(''.slice);
 
        var plus = /\+/g;
        var sequences = Array(4);
 
        var percentSequence = function (bytes) {
-         return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp('((?:%[\\da-f]{2}){' + bytes + '})', 'gi'));
+         return sequences[bytes - 1] || (sequences[bytes - 1] = RegExp$1('((?:%[\\da-f]{2}){' + bytes + '})', 'gi'));
        };
 
        var percentDecode = function (sequence) {
          try {
-           return decodeURIComponent(sequence);
+           return decodeURIComponent$1(sequence);
          } catch (error) {
            return sequence;
          }
        };
 
        var deserialize = function (it) {
-         var result = it.replace(plus, ' ');
+         var result = replace$6(it, plus, ' ');
          var bytes = 4;
          try {
-           return decodeURIComponent(result);
+           return decodeURIComponent$1(result);
          } catch (error) {
            while (bytes) {
-             result = result.replace(percentSequence(bytes--), percentDecode);
+             result = replace$6(result, percentSequence(bytes--), percentDecode);
            }
            return result;
          }
        };
 
-       var find = /[!'()~]|%20/g;
+       var find$1 = /[!'()~]|%20/g;
 
-       var replace = {
+       var replacements = {
          '!': '%21',
          "'": '%27',
          '(': '%28',
        };
 
        var replacer = function (match) {
-         return replace[match];
+         return replacements[match];
        };
 
        var serialize = function (it) {
-         return encodeURIComponent(it).replace(find, replacer);
+         return replace$6(encodeURIComponent$1(it), find$1, replacer);
        };
 
        var parseSearchParams = function (result, query) {
          if (query) {
-           var attributes = query.split('&');
+           var attributes = split$3(query, '&');
            var index = 0;
            var attribute, entry;
            while (index < attributes.length) {
              attribute = attributes[index++];
              if (attribute.length) {
-               entry = attribute.split('=');
-               result.push({
-                 key: deserialize(entry.shift()),
-                 value: deserialize(entry.join('='))
+               entry = split$3(attribute, '=');
+               push$7(result, {
+                 key: deserialize(shift$1(entry)),
+                 value: deserialize(join$4(entry, '='))
                });
              }
            }
        };
 
        var validateArgumentsLength = function (passed, required) {
-         if (passed < required) throw TypeError('Not enough arguments');
+         if (passed < required) throw TypeError$8('Not enough arguments');
        };
 
        var URLSearchParamsIterator = createIteratorConstructor(function Iterator(params, kind) {
-         setInternalState$5(this, {
+         setInternalState$2(this, {
            type: URL_SEARCH_PARAMS_ITERATOR,
-           iterator: getIterator(getInternalParamsState(params).entries),
+           iterator: getIterator$1(getInternalParamsState(params).entries),
            kind: kind
          });
        }, 'Iterator', function next() {
        // `URLSearchParams` constructor
        // https://url.spec.whatwg.org/#interface-urlsearchparams
        var URLSearchParamsConstructor = function URLSearchParams(/* init */) {
-         anInstance(this, URLSearchParamsConstructor, URL_SEARCH_PARAMS);
+         anInstance$3(this, URLSearchParamsPrototype);
          var init = arguments.length > 0 ? arguments[0] : undefined;
          var that = this;
          var entries = [];
          var iteratorMethod, iterator, next, step, entryIterator, entryNext, first, second, key;
 
-         setInternalState$5(that, {
+         setInternalState$2(that, {
            type: URL_SEARCH_PARAMS,
            entries: entries,
            updateURL: function () { /* empty */ },
          });
 
          if (init !== undefined) {
-           if (isObject(init)) {
-             iteratorMethod = getIteratorMethod(init);
-             if (typeof iteratorMethod === 'function') {
-               iterator = iteratorMethod.call(init);
+           if (isObject$d(init)) {
+             iteratorMethod = getIteratorMethod$1(init);
+             if (iteratorMethod) {
+               iterator = getIterator$1(init, iteratorMethod);
                next = iterator.next;
-               while (!(step = next.call(iterator)).done) {
-                 entryIterator = getIterator(anObject(step.value));
+               while (!(step = call$a(next, iterator)).done) {
+                 entryIterator = getIterator$1(anObject$9(step.value));
                  entryNext = entryIterator.next;
                  if (
-                   (first = entryNext.call(entryIterator)).done ||
-                   (second = entryNext.call(entryIterator)).done ||
-                   !entryNext.call(entryIterator).done
-                 ) throw TypeError('Expected sequence with length 2');
-                 entries.push({ key: first.value + '', value: second.value + '' });
+                   (first = call$a(entryNext, entryIterator)).done ||
+                   (second = call$a(entryNext, entryIterator)).done ||
+                   !call$a(entryNext, entryIterator).done
+                 ) throw TypeError$8('Expected sequence with length 2');
+                 push$7(entries, { key: $toString$2(first.value), value: $toString$2(second.value) });
                }
-             } else for (key in init) if (has(init, key)) entries.push({ key: key, value: init[key] + '' });
+             } else for (key in init) if (hasOwn$6(init, key)) push$7(entries, { key: key, value: $toString$2(init[key]) });
            } else {
-             parseSearchParams(entries, typeof init === 'string' ? init.charAt(0) === '?' ? init.slice(1) : init : init + '');
+             parseSearchParams(
+               entries,
+               typeof init == 'string' ? charAt$5(init, 0) === '?' ? stringSlice$8(init, 1) : init : $toString$2(init)
+             );
            }
          }
        };
 
        var URLSearchParamsPrototype = URLSearchParamsConstructor.prototype;
 
-       redefineAll(URLSearchParamsPrototype, {
-         // `URLSearchParams.prototype.appent` method
+       redefineAll$1(URLSearchParamsPrototype, {
+         // `URLSearchParams.prototype.append` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-append
          append: function append(name, value) {
            validateArgumentsLength(arguments.length, 2);
            var state = getInternalParamsState(this);
-           state.entries.push({ key: name + '', value: value + '' });
+           push$7(state.entries, { key: $toString$2(name), value: $toString$2(value) });
            state.updateURL();
          },
          // `URLSearchParams.prototype.delete` method
            validateArgumentsLength(arguments.length, 1);
            var state = getInternalParamsState(this);
            var entries = state.entries;
-           var key = name + '';
+           var key = $toString$2(name);
            var index = 0;
            while (index < entries.length) {
-             if (entries[index].key === key) entries.splice(index, 1);
+             if (entries[index].key === key) splice(entries, index, 1);
              else index++;
            }
            state.updateURL();
          get: function get(name) {
            validateArgumentsLength(arguments.length, 1);
            var entries = getInternalParamsState(this).entries;
-           var key = name + '';
+           var key = $toString$2(name);
            var index = 0;
            for (; index < entries.length; index++) {
              if (entries[index].key === key) return entries[index].value;
          getAll: function getAll(name) {
            validateArgumentsLength(arguments.length, 1);
            var entries = getInternalParamsState(this).entries;
-           var key = name + '';
+           var key = $toString$2(name);
            var result = [];
            var index = 0;
            for (; index < entries.length; index++) {
-             if (entries[index].key === key) result.push(entries[index].value);
+             if (entries[index].key === key) push$7(result, entries[index].value);
            }
            return result;
          },
          has: function has(name) {
            validateArgumentsLength(arguments.length, 1);
            var entries = getInternalParamsState(this).entries;
-           var key = name + '';
+           var key = $toString$2(name);
            var index = 0;
            while (index < entries.length) {
              if (entries[index++].key === key) return true;
            var state = getInternalParamsState(this);
            var entries = state.entries;
            var found = false;
-           var key = name + '';
-           var val = value + '';
+           var key = $toString$2(name);
+           var val = $toString$2(value);
            var index = 0;
            var entry;
            for (; index < entries.length; index++) {
              entry = entries[index];
              if (entry.key === key) {
-               if (found) entries.splice(index--, 1);
+               if (found) splice(entries, index--, 1);
                else {
                  found = true;
                  entry.value = val;
                }
              }
            }
-           if (!found) entries.push({ key: key, value: val });
+           if (!found) push$7(entries, { key: key, value: val });
            state.updateURL();
          },
          // `URLSearchParams.prototype.sort` method
          // https://url.spec.whatwg.org/#dom-urlsearchparams-sort
          sort: function sort() {
            var state = getInternalParamsState(this);
-           var entries = state.entries;
-           // Array#sort is not stable in some engines
-           var slice = entries.slice();
-           var entry, entriesIndex, sliceIndex;
-           entries.length = 0;
-           for (sliceIndex = 0; sliceIndex < slice.length; sliceIndex++) {
-             entry = slice[sliceIndex];
-             for (entriesIndex = 0; entriesIndex < sliceIndex; entriesIndex++) {
-               if (entries[entriesIndex].key > entry.key) {
-                 entries.splice(entriesIndex, 0, entry);
-                 break;
-               }
-             }
-             if (entriesIndex === sliceIndex) entries.push(entry);
-           }
+           arraySort(state.entries, function (a, b) {
+             return a.key > b.key ? 1 : -1;
+           });
            state.updateURL();
          },
          // `URLSearchParams.prototype.forEach` method
          forEach: function forEach(callback /* , thisArg */) {
            var entries = getInternalParamsState(this).entries;
-           var boundFunction = functionBindContext(callback, arguments.length > 1 ? arguments[1] : undefined, 3);
+           var boundFunction = bind$8(callback, arguments.length > 1 ? arguments[1] : undefined);
            var index = 0;
            var entry;
            while (index < entries.length) {
        }, { enumerable: true });
 
        // `URLSearchParams.prototype[@@iterator]` method
-       redefine(URLSearchParamsPrototype, ITERATOR$8, URLSearchParamsPrototype.entries);
+       redefine$7(URLSearchParamsPrototype, ITERATOR$2, URLSearchParamsPrototype.entries, { name: 'entries' });
 
        // `URLSearchParams.prototype.toString` method
        // https://url.spec.whatwg.org/#urlsearchparams-stringification-behavior
-       redefine(URLSearchParamsPrototype, 'toString', function toString() {
+       redefine$7(URLSearchParamsPrototype, 'toString', function toString() {
          var entries = getInternalParamsState(this).entries;
          var result = [];
          var index = 0;
          var entry;
          while (index < entries.length) {
            entry = entries[index++];
-           result.push(serialize(entry.key) + '=' + serialize(entry.value));
-         } return result.join('&');
+           push$7(result, serialize(entry.key) + '=' + serialize(entry.value));
+         } return join$4(result, '&');
        }, { enumerable: true });
 
-       setToStringTag(URLSearchParamsConstructor, URL_SEARCH_PARAMS);
+       setToStringTag$4(URLSearchParamsConstructor, URL_SEARCH_PARAMS);
 
-       _export({ global: true, forced: !nativeUrl }, {
+       $$X({ global: true, forced: !USE_NATIVE_URL$1 }, {
          URLSearchParams: URLSearchParamsConstructor
        });
 
-       // Wrap `fetch` for correct work with polyfilled `URLSearchParams`
-       // https://github.com/zloirock/core-js/issues/674
-       if (!nativeUrl && typeof $fetch$1 == 'function' && typeof Headers == 'function') {
-         _export({ global: true, enumerable: true, forced: true }, {
-           fetch: function fetch(input /* , init */) {
-             var args = [input];
-             var init, body, headers;
-             if (arguments.length > 1) {
-               init = arguments[1];
-               if (isObject(init)) {
-                 body = init.body;
-                 if (classof(body) === URL_SEARCH_PARAMS) {
-                   headers = init.headers ? new Headers(init.headers) : new Headers();
-                   if (!headers.has('content-type')) {
-                     headers.set('content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
-                   }
-                   init = objectCreate(init, {
-                     body: createPropertyDescriptor(0, String(body)),
-                     headers: createPropertyDescriptor(0, headers)
-                   });
-                 }
-               }
-               args.push(init);
-             } return $fetch$1.apply(this, args);
-           }
-         });
+       // Wrap `fetch` and `Request` for correct work with polyfilled `URLSearchParams`
+       if (!USE_NATIVE_URL$1 && isCallable$5(Headers$1)) {
+         var headersHas = uncurryThis$u(HeadersPrototype.has);
+         var headersSet = uncurryThis$u(HeadersPrototype.set);
+
+         var wrapRequestOptions = function (init) {
+           if (isObject$d(init)) {
+             var body = init.body;
+             var headers;
+             if (classof$3(body) === URL_SEARCH_PARAMS) {
+               headers = init.headers ? new Headers$1(init.headers) : new Headers$1();
+               if (!headersHas(headers, 'content-type')) {
+                 headersSet(headers, 'content-type', 'application/x-www-form-urlencoded;charset=UTF-8');
+               }
+               return create$6(init, {
+                 body: createPropertyDescriptor(0, $toString$2(body)),
+                 headers: createPropertyDescriptor(0, headers)
+               });
+             }
+           } return init;
+         };
+
+         if (isCallable$5(n$Fetch)) {
+           $$X({ global: true, enumerable: true, forced: true }, {
+             fetch: function fetch(input /* , init */) {
+               return n$Fetch(input, arguments.length > 1 ? wrapRequestOptions(arguments[1]) : {});
+             }
+           });
+         }
+
+         if (isCallable$5(N$Request)) {
+           var RequestConstructor = function Request(input /* , init */) {
+             anInstance$3(this, RequestPrototype);
+             return new N$Request(input, arguments.length > 1 ? wrapRequestOptions(arguments[1]) : {});
+           };
+
+           RequestPrototype.constructor = RequestConstructor;
+           RequestConstructor.prototype = RequestPrototype;
+
+           $$X({ global: true, forced: true }, {
+             Request: RequestConstructor
+           });
+         }
        }
 
        var web_urlSearchParams = {
          getState: getInternalParamsState
        };
 
-       // TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
+       var uncurryThis$t = functionUncurryThis;
+       var PROPER_FUNCTION_NAME$1 = functionName.PROPER;
+       var redefine$6 = redefine$h.exports;
+       var anObject$8 = anObject$n;
+       var isPrototypeOf$2 = objectIsPrototypeOf;
+       var $toString$1 = toString$k;
+       var fails$s = fails$S;
+       var regExpFlags$2 = regexpFlags$1;
 
+       var TO_STRING = 'toString';
+       var RegExpPrototype$3 = RegExp.prototype;
+       var n$ToString = RegExpPrototype$3[TO_STRING];
+       var getFlags$1 = uncurryThis$t(regExpFlags$2);
 
+       var NOT_GENERIC = fails$s(function () { return n$ToString.call({ source: 'a', flags: 'b' }) != '/a/b'; });
+       // FF44- RegExp#toString has a wrong name
+       var INCORRECT_NAME = PROPER_FUNCTION_NAME$1 && n$ToString.name != TO_STRING;
 
+       // `RegExp.prototype.toString` method
+       // https://tc39.es/ecma262/#sec-regexp.prototype.tostring
+       if (NOT_GENERIC || INCORRECT_NAME) {
+         redefine$6(RegExp.prototype, TO_STRING, function toString() {
+           var R = anObject$8(this);
+           var p = $toString$1(R.source);
+           var rf = R.flags;
+           var f = $toString$1(rf === undefined && isPrototypeOf$2(RegExpPrototype$3, R) && !('flags' in RegExpPrototype$3) ? getFlags$1(R) : rf);
+           return '/' + p + '/' + f;
+         }, { unsafe: true });
+       }
 
+       // TODO: Remove from `core-js@4` since it's moved to entry points
 
+       var uncurryThis$s = functionUncurryThis;
+       var redefine$5 = redefine$h.exports;
+       var regexpExec$2 = regexpExec$3;
+       var fails$r = fails$S;
+       var wellKnownSymbol$5 = wellKnownSymbol$t;
+       var createNonEnumerableProperty$1 = createNonEnumerableProperty$b;
 
+       var SPECIES = wellKnownSymbol$5('species');
+       var RegExpPrototype$2 = RegExp.prototype;
 
+       var fixRegexpWellKnownSymbolLogic = function (KEY, exec, FORCED, SHAM) {
+         var SYMBOL = wellKnownSymbol$5(KEY);
 
+         var DELEGATES_TO_SYMBOL = !fails$r(function () {
+           // String methods call symbol-named RegEp methods
+           var O = {};
+           O[SYMBOL] = function () { return 7; };
+           return ''[KEY](O) != 7;
+         });
 
+         var DELEGATES_TO_EXEC = DELEGATES_TO_SYMBOL && !fails$r(function () {
+           // Symbol-named RegExp methods call .exec
+           var execCalled = false;
+           var re = /a/;
 
+           if (KEY === 'split') {
+             // We can't use real regex here since it causes deoptimization
+             // and serious performance degradation in V8
+             // https://github.com/zloirock/core-js/issues/306
+             re = {};
+             // RegExp[@@split] doesn't call the regex's exec method, but first creates
+             // a new one. We need to return the patched regex when creating the new one.
+             re.constructor = {};
+             re.constructor[SPECIES] = function () { return re; };
+             re.flags = '';
+             re[SYMBOL] = /./[SYMBOL];
+           }
 
-       var codeAt = stringMultibyte.codeAt;
+           re.exec = function () { execCalled = true; return null; };
 
+           re[SYMBOL]('');
+           return !execCalled;
+         });
 
+         if (
+           !DELEGATES_TO_SYMBOL ||
+           !DELEGATES_TO_EXEC ||
+           FORCED
+         ) {
+           var uncurriedNativeRegExpMethod = uncurryThis$s(/./[SYMBOL]);
+           var methods = exec(SYMBOL, ''[KEY], function (nativeMethod, regexp, str, arg2, forceStringMethod) {
+             var uncurriedNativeMethod = uncurryThis$s(nativeMethod);
+             var $exec = regexp.exec;
+             if ($exec === regexpExec$2 || $exec === RegExpPrototype$2.exec) {
+               if (DELEGATES_TO_SYMBOL && !forceStringMethod) {
+                 // The native String method already delegates to @@method (this
+                 // polyfilled function), leasing to infinite recursion.
+                 // We avoid it by directly calling the native @@method method.
+                 return { done: true, value: uncurriedNativeRegExpMethod(regexp, str, arg2) };
+               }
+               return { done: true, value: uncurriedNativeMethod(str, regexp, arg2) };
+             }
+             return { done: false };
+           });
 
+           redefine$5(String.prototype, KEY, methods[0]);
+           redefine$5(RegExpPrototype$2, SYMBOL, methods[1]);
+         }
 
+         if (SHAM) createNonEnumerableProperty$1(RegExpPrototype$2[SYMBOL], 'sham', true);
+       };
 
-       var NativeURL = global_1.URL;
-       var URLSearchParams$1 = web_urlSearchParams.URLSearchParams;
-       var getInternalSearchParamsState = web_urlSearchParams.getState;
-       var setInternalState$6 = internalState.set;
-       var getInternalURLState = internalState.getterFor('URL');
-       var floor$5 = Math.floor;
-       var pow$1 = Math.pow;
+       var charAt$4 = stringMultibyte.charAt;
 
-       var INVALID_AUTHORITY = 'Invalid authority';
-       var INVALID_SCHEME = 'Invalid scheme';
-       var INVALID_HOST = 'Invalid host';
-       var INVALID_PORT = 'Invalid port';
+       // `AdvanceStringIndex` abstract operation
+       // https://tc39.es/ecma262/#sec-advancestringindex
+       var advanceStringIndex$3 = function (S, index, unicode) {
+         return index + (unicode ? charAt$4(S, index).length : 1);
+       };
 
-       var ALPHA = /[A-Za-z]/;
-       var ALPHANUMERIC = /[\d+-.A-Za-z]/;
-       var DIGIT = /\d/;
-       var HEX_START = /^(0x|0X)/;
-       var OCT = /^[0-7]+$/;
-       var DEC = /^\d+$/;
-       var HEX = /^[\dA-Fa-f]+$/;
-       // eslint-disable-next-line no-control-regex
-       var FORBIDDEN_HOST_CODE_POINT = /[\u0000\u0009\u000A\u000D #%/:?@[\\]]/;
-       // eslint-disable-next-line no-control-regex
-       var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\u0000\u0009\u000A\u000D #/:?@[\\]]/;
-       // eslint-disable-next-line no-control-regex
-       var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u001F ]+|[\u0000-\u001F ]+$/g;
-       // eslint-disable-next-line no-control-regex
-       var TAB_AND_NEW_LINE = /[\u0009\u000A\u000D]/g;
-       var EOF;
+       var uncurryThis$r = functionUncurryThis;
+       var toObject$9 = toObject$j;
 
-       var parseHost = function (url, input) {
-         var result, codePoints, index;
-         if (input.charAt(0) == '[') {
-           if (input.charAt(input.length - 1) != ']') return INVALID_HOST;
-           result = parseIPv6(input.slice(1, -1));
-           if (!result) return INVALID_HOST;
-           url.host = result;
-         // opaque host
-         } else if (!isSpecial(url)) {
-           if (FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT.test(input)) return INVALID_HOST;
-           result = '';
-           codePoints = arrayFrom(input);
-           for (index = 0; index < codePoints.length; index++) {
-             result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);
+       var floor$3 = Math.floor;
+       var charAt$3 = uncurryThis$r(''.charAt);
+       var replace$5 = uncurryThis$r(''.replace);
+       var stringSlice$7 = uncurryThis$r(''.slice);
+       var SUBSTITUTION_SYMBOLS = /\$([$&'`]|\d{1,2}|<[^>]*>)/g;
+       var SUBSTITUTION_SYMBOLS_NO_NAMED = /\$([$&'`]|\d{1,2})/g;
+
+       // `GetSubstitution` abstract operation
+       // https://tc39.es/ecma262/#sec-getsubstitution
+       var getSubstitution$1 = function (matched, str, position, captures, namedCaptures, replacement) {
+         var tailPos = position + matched.length;
+         var m = captures.length;
+         var symbols = SUBSTITUTION_SYMBOLS_NO_NAMED;
+         if (namedCaptures !== undefined) {
+           namedCaptures = toObject$9(namedCaptures);
+           symbols = SUBSTITUTION_SYMBOLS;
+         }
+         return replace$5(replacement, symbols, function (match, ch) {
+           var capture;
+           switch (charAt$3(ch, 0)) {
+             case '$': return '$';
+             case '&': return matched;
+             case '`': return stringSlice$7(str, 0, position);
+             case "'": return stringSlice$7(str, tailPos);
+             case '<':
+               capture = namedCaptures[stringSlice$7(ch, 1, -1)];
+               break;
+             default: // \d\d?
+               var n = +ch;
+               if (n === 0) return match;
+               if (n > m) {
+                 var f = floor$3(n / 10);
+                 if (f === 0) return match;
+                 if (f <= m) return captures[f - 1] === undefined ? charAt$3(ch, 1) : captures[f - 1] + charAt$3(ch, 1);
+                 return match;
+               }
+               capture = captures[n - 1];
            }
-           url.host = result;
-         } else {
-           input = stringPunycodeToAscii(input);
-           if (FORBIDDEN_HOST_CODE_POINT.test(input)) return INVALID_HOST;
-           result = parseIPv4(input);
-           if (result === null) return INVALID_HOST;
-           url.host = result;
-         }
+           return capture === undefined ? '' : capture;
+         });
        };
 
-       var parseIPv4 = function (input) {
-         var parts = input.split('.');
-         var partsLength, numbers, index, part, radix, number, ipv4;
-         if (parts.length && parts[parts.length - 1] == '') {
-           parts.pop();
-         }
-         partsLength = parts.length;
-         if (partsLength > 4) return input;
-         numbers = [];
-         for (index = 0; index < partsLength; index++) {
-           part = parts[index];
-           if (part == '') return input;
-           radix = 10;
-           if (part.length > 1 && part.charAt(0) == '0') {
-             radix = HEX_START.test(part) ? 16 : 8;
-             part = part.slice(radix == 8 ? 1 : 2);
-           }
-           if (part === '') {
-             number = 0;
-           } else {
-             if (!(radix == 10 ? DEC : radix == 8 ? OCT : HEX).test(part)) return input;
-             number = parseInt(part, radix);
-           }
-           numbers.push(number);
-         }
-         for (index = 0; index < partsLength; index++) {
-           number = numbers[index];
-           if (index == partsLength - 1) {
-             if (number >= pow$1(256, 5 - partsLength)) return null;
-           } else if (number > 255) return null;
-         }
-         ipv4 = numbers.pop();
-         for (index = 0; index < numbers.length; index++) {
-           ipv4 += numbers[index] * pow$1(256, 3 - index);
+       var global$m = global$1m;
+       var call$9 = functionCall;
+       var anObject$7 = anObject$n;
+       var isCallable$4 = isCallable$r;
+       var classof$2 = classofRaw$1;
+       var regexpExec$1 = regexpExec$3;
+
+       var TypeError$7 = global$m.TypeError;
+
+       // `RegExpExec` abstract operation
+       // https://tc39.es/ecma262/#sec-regexpexec
+       var regexpExecAbstract = function (R, S) {
+         var exec = R.exec;
+         if (isCallable$4(exec)) {
+           var result = call$9(exec, R, S);
+           if (result !== null) anObject$7(result);
+           return result;
          }
-         return ipv4;
+         if (classof$2(R) === 'RegExp') return call$9(regexpExec$1, R, S);
+         throw TypeError$7('RegExp#exec called on incompatible receiver');
        };
 
-       // eslint-disable-next-line max-statements
-       var parseIPv6 = function (input) {
-         var address = [0, 0, 0, 0, 0, 0, 0, 0];
-         var pieceIndex = 0;
-         var compress = null;
-         var pointer = 0;
-         var value, length, numbersSeen, ipv4Piece, number, swaps, swap;
+       var apply$3 = functionApply;
+       var call$8 = functionCall;
+       var uncurryThis$q = functionUncurryThis;
+       var fixRegExpWellKnownSymbolLogic$3 = fixRegexpWellKnownSymbolLogic;
+       var fails$q = fails$S;
+       var anObject$6 = anObject$n;
+       var isCallable$3 = isCallable$r;
+       var toIntegerOrInfinity$3 = toIntegerOrInfinity$b;
+       var toLength$5 = toLength$c;
+       var toString$f = toString$k;
+       var requireObjectCoercible$a = requireObjectCoercible$e;
+       var advanceStringIndex$2 = advanceStringIndex$3;
+       var getMethod$3 = getMethod$7;
+       var getSubstitution = getSubstitution$1;
+       var regExpExec$3 = regexpExecAbstract;
+       var wellKnownSymbol$4 = wellKnownSymbol$t;
+
+       var REPLACE = wellKnownSymbol$4('replace');
+       var max$2 = Math.max;
+       var min$5 = Math.min;
+       var concat$2 = uncurryThis$q([].concat);
+       var push$6 = uncurryThis$q([].push);
+       var stringIndexOf$2 = uncurryThis$q(''.indexOf);
+       var stringSlice$6 = uncurryThis$q(''.slice);
 
-         var char = function () {
-           return input.charAt(pointer);
-         };
+       var maybeToString = function (it) {
+         return it === undefined ? it : String(it);
+       };
 
-         if (char() == ':') {
-           if (input.charAt(1) != ':') return;
-           pointer += 2;
-           pieceIndex++;
-           compress = pieceIndex;
+       // IE <= 11 replaces $0 with the whole match, as if it was $&
+       // https://stackoverflow.com/questions/6024666/getting-ie-to-replace-a-regex-with-the-literal-string-0
+       var REPLACE_KEEPS_$0 = (function () {
+         // eslint-disable-next-line regexp/prefer-escape-replacement-dollar-char -- required for testing
+         return 'a'.replace(/./, '$0') === '$0';
+       })();
+
+       // Safari <= 13.0.3(?) substitutes nth capture where n>m with an empty string
+       var REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE = (function () {
+         if (/./[REPLACE]) {
+           return /./[REPLACE]('a', '$0') === '';
          }
-         while (char()) {
-           if (pieceIndex == 8) return;
-           if (char() == ':') {
-             if (compress !== null) return;
-             pointer++;
-             pieceIndex++;
-             compress = pieceIndex;
-             continue;
-           }
-           value = length = 0;
-           while (length < 4 && HEX.test(char())) {
-             value = value * 16 + parseInt(char(), 16);
-             pointer++;
-             length++;
-           }
-           if (char() == '.') {
-             if (length == 0) return;
-             pointer -= length;
-             if (pieceIndex > 6) return;
-             numbersSeen = 0;
-             while (char()) {
-               ipv4Piece = null;
-               if (numbersSeen > 0) {
-                 if (char() == '.' && numbersSeen < 4) pointer++;
-                 else return;
+         return false;
+       })();
+
+       var REPLACE_SUPPORTS_NAMED_GROUPS = !fails$q(function () {
+         var re = /./;
+         re.exec = function () {
+           var result = [];
+           result.groups = { a: '7' };
+           return result;
+         };
+         // eslint-disable-next-line regexp/no-useless-dollar-replacements -- false positive
+         return ''.replace(re, '$<a>') !== '7';
+       });
+
+       // @@replace logic
+       fixRegExpWellKnownSymbolLogic$3('replace', function (_, nativeReplace, maybeCallNative) {
+         var UNSAFE_SUBSTITUTE = REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE ? '$' : '$0';
+
+         return [
+           // `String.prototype.replace` method
+           // https://tc39.es/ecma262/#sec-string.prototype.replace
+           function replace(searchValue, replaceValue) {
+             var O = requireObjectCoercible$a(this);
+             var replacer = searchValue == undefined ? undefined : getMethod$3(searchValue, REPLACE);
+             return replacer
+               ? call$8(replacer, searchValue, O, replaceValue)
+               : call$8(nativeReplace, toString$f(O), searchValue, replaceValue);
+           },
+           // `RegExp.prototype[@@replace]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@replace
+           function (string, replaceValue) {
+             var rx = anObject$6(this);
+             var S = toString$f(string);
+
+             if (
+               typeof replaceValue == 'string' &&
+               stringIndexOf$2(replaceValue, UNSAFE_SUBSTITUTE) === -1 &&
+               stringIndexOf$2(replaceValue, '$<') === -1
+             ) {
+               var res = maybeCallNative(nativeReplace, rx, S, replaceValue);
+               if (res.done) return res.value;
+             }
+
+             var functionalReplace = isCallable$3(replaceValue);
+             if (!functionalReplace) replaceValue = toString$f(replaceValue);
+
+             var global = rx.global;
+             if (global) {
+               var fullUnicode = rx.unicode;
+               rx.lastIndex = 0;
+             }
+             var results = [];
+             while (true) {
+               var result = regExpExec$3(rx, S);
+               if (result === null) break;
+
+               push$6(results, result);
+               if (!global) break;
+
+               var matchStr = toString$f(result[0]);
+               if (matchStr === '') rx.lastIndex = advanceStringIndex$2(S, toLength$5(rx.lastIndex), fullUnicode);
+             }
+
+             var accumulatedResult = '';
+             var nextSourcePosition = 0;
+             for (var i = 0; i < results.length; i++) {
+               result = results[i];
+
+               var matched = toString$f(result[0]);
+               var position = max$2(min$5(toIntegerOrInfinity$3(result.index), S.length), 0);
+               var captures = [];
+               // NOTE: This is equivalent to
+               //   captures = result.slice(1).map(maybeToString)
+               // but for some reason `nativeSlice.call(result, 1, result.length)` (called in
+               // the slice polyfill when slicing native arrays) "doesn't work" in safari 9 and
+               // causes a crash (https://pastebin.com/N21QzeQA) when trying to debug it.
+               for (var j = 1; j < result.length; j++) push$6(captures, maybeToString(result[j]));
+               var namedCaptures = result.groups;
+               if (functionalReplace) {
+                 var replacerArgs = concat$2([matched], captures, position, S);
+                 if (namedCaptures !== undefined) push$6(replacerArgs, namedCaptures);
+                 var replacement = toString$f(apply$3(replaceValue, undefined, replacerArgs));
+               } else {
+                 replacement = getSubstitution(matched, S, position, captures, namedCaptures, replaceValue);
                }
-               if (!DIGIT.test(char())) return;
-               while (DIGIT.test(char())) {
-                 number = parseInt(char(), 10);
-                 if (ipv4Piece === null) ipv4Piece = number;
-                 else if (ipv4Piece == 0) return;
-                 else ipv4Piece = ipv4Piece * 10 + number;
-                 if (ipv4Piece > 255) return;
-                 pointer++;
+               if (position >= nextSourcePosition) {
+                 accumulatedResult += stringSlice$6(S, nextSourcePosition, position) + replacement;
+                 nextSourcePosition = position + matched.length;
                }
-               address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;
-               numbersSeen++;
-               if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;
              }
-             if (numbersSeen != 4) return;
-             break;
-           } else if (char() == ':') {
-             pointer++;
-             if (!char()) return;
-           } else if (char()) return;
-           address[pieceIndex++] = value;
-         }
-         if (compress !== null) {
-           swaps = pieceIndex - compress;
-           pieceIndex = 7;
-           while (pieceIndex != 0 && swaps > 0) {
-             swap = address[pieceIndex];
-             address[pieceIndex--] = address[compress + swaps - 1];
-             address[compress + --swaps] = swap;
+             return accumulatedResult + stringSlice$6(S, nextSourcePosition);
            }
-         } else if (pieceIndex != 8) return;
-         return address;
+         ];
+       }, !REPLACE_SUPPORTS_NAMED_GROUPS || !REPLACE_KEEPS_$0 || REGEXP_REPLACE_SUBSTITUTES_UNDEFINED_CAPTURE);
+
+       var isObject$c = isObject$s;
+       var classof$1 = classofRaw$1;
+       var wellKnownSymbol$3 = wellKnownSymbol$t;
+
+       var MATCH$2 = wellKnownSymbol$3('match');
+
+       // `IsRegExp` abstract operation
+       // https://tc39.es/ecma262/#sec-isregexp
+       var isRegexp = function (it) {
+         var isRegExp;
+         return isObject$c(it) && ((isRegExp = it[MATCH$2]) !== undefined ? !!isRegExp : classof$1(it) == 'RegExp');
        };
 
-       var findLongestZeroSequence = function (ipv6) {
-         var maxIndex = null;
-         var maxLength = 1;
-         var currStart = null;
-         var currLength = 0;
-         var index = 0;
-         for (; index < 8; index++) {
-           if (ipv6[index] !== 0) {
-             if (currLength > maxLength) {
-               maxIndex = currStart;
-               maxLength = currLength;
+       var apply$2 = functionApply;
+       var call$7 = functionCall;
+       var uncurryThis$p = functionUncurryThis;
+       var fixRegExpWellKnownSymbolLogic$2 = fixRegexpWellKnownSymbolLogic;
+       var isRegExp$2 = isRegexp;
+       var anObject$5 = anObject$n;
+       var requireObjectCoercible$9 = requireObjectCoercible$e;
+       var speciesConstructor$1 = speciesConstructor$5;
+       var advanceStringIndex$1 = advanceStringIndex$3;
+       var toLength$4 = toLength$c;
+       var toString$e = toString$k;
+       var getMethod$2 = getMethod$7;
+       var arraySlice$4 = arraySlice$c;
+       var callRegExpExec = regexpExecAbstract;
+       var regexpExec = regexpExec$3;
+       var stickyHelpers$1 = regexpStickyHelpers;
+       var fails$p = fails$S;
+
+       var UNSUPPORTED_Y$1 = stickyHelpers$1.UNSUPPORTED_Y;
+       var MAX_UINT32 = 0xFFFFFFFF;
+       var min$4 = Math.min;
+       var $push = [].push;
+       var exec$4 = uncurryThis$p(/./.exec);
+       var push$5 = uncurryThis$p($push);
+       var stringSlice$5 = uncurryThis$p(''.slice);
+
+       // Chrome 51 has a buggy "split" implementation when RegExp#exec !== nativeExec
+       // Weex JS has frozen built-in prototypes, so use try / catch wrapper
+       var SPLIT_WORKS_WITH_OVERWRITTEN_EXEC = !fails$p(function () {
+         // eslint-disable-next-line regexp/no-empty-group -- required for testing
+         var re = /(?:)/;
+         var originalExec = re.exec;
+         re.exec = function () { return originalExec.apply(this, arguments); };
+         var result = 'ab'.split(re);
+         return result.length !== 2 || result[0] !== 'a' || result[1] !== 'b';
+       });
+
+       // @@split logic
+       fixRegExpWellKnownSymbolLogic$2('split', function (SPLIT, nativeSplit, maybeCallNative) {
+         var internalSplit;
+         if (
+           'abbc'.split(/(b)*/)[1] == 'c' ||
+           // eslint-disable-next-line regexp/no-empty-group -- required for testing
+           'test'.split(/(?:)/, -1).length != 4 ||
+           'ab'.split(/(?:ab)*/).length != 2 ||
+           '.'.split(/(.?)(.?)/).length != 4 ||
+           // eslint-disable-next-line regexp/no-empty-capturing-group, regexp/no-empty-group -- required for testing
+           '.'.split(/()()/).length > 1 ||
+           ''.split(/.?/).length
+         ) {
+           // based on es5-shim implementation, need to rework it
+           internalSplit = function (separator, limit) {
+             var string = toString$e(requireObjectCoercible$9(this));
+             var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+             if (lim === 0) return [];
+             if (separator === undefined) return [string];
+             // If `separator` is not a regex, use native split
+             if (!isRegExp$2(separator)) {
+               return call$7(nativeSplit, string, separator, lim);
              }
-             currStart = null;
-             currLength = 0;
-           } else {
-             if (currStart === null) currStart = index;
-             ++currLength;
-           }
-         }
-         if (currLength > maxLength) {
-           maxIndex = currStart;
-           maxLength = currLength;
-         }
-         return maxIndex;
-       };
+             var output = [];
+             var flags = (separator.ignoreCase ? 'i' : '') +
+                         (separator.multiline ? 'm' : '') +
+                         (separator.unicode ? 'u' : '') +
+                         (separator.sticky ? 'y' : '');
+             var lastLastIndex = 0;
+             // Make `global` and avoid `lastIndex` issues by working with a copy
+             var separatorCopy = new RegExp(separator.source, flags + 'g');
+             var match, lastIndex, lastLength;
+             while (match = call$7(regexpExec, separatorCopy, string)) {
+               lastIndex = separatorCopy.lastIndex;
+               if (lastIndex > lastLastIndex) {
+                 push$5(output, stringSlice$5(string, lastLastIndex, match.index));
+                 if (match.length > 1 && match.index < string.length) apply$2($push, output, arraySlice$4(match, 1));
+                 lastLength = match[0].length;
+                 lastLastIndex = lastIndex;
+                 if (output.length >= lim) break;
+               }
+               if (separatorCopy.lastIndex === match.index) separatorCopy.lastIndex++; // Avoid an infinite loop
+             }
+             if (lastLastIndex === string.length) {
+               if (lastLength || !exec$4(separatorCopy, '')) push$5(output, '');
+             } else push$5(output, stringSlice$5(string, lastLastIndex));
+             return output.length > lim ? arraySlice$4(output, 0, lim) : output;
+           };
+         // Chakra, V8
+         } else if ('0'.split(undefined, 0).length) {
+           internalSplit = function (separator, limit) {
+             return separator === undefined && limit === 0 ? [] : call$7(nativeSplit, this, separator, limit);
+           };
+         } else internalSplit = nativeSplit;
 
-       var serializeHost = function (host) {
-         var result, index, compress, ignore0;
-         // ipv4
-         if (typeof host == 'number') {
-           result = [];
-           for (index = 0; index < 4; index++) {
-             result.unshift(host % 256);
-             host = floor$5(host / 256);
-           } return result.join('.');
-         // ipv6
-         } else if (typeof host == 'object') {
-           result = '';
-           compress = findLongestZeroSequence(host);
-           for (index = 0; index < 8; index++) {
-             if (ignore0 && host[index] === 0) continue;
-             if (ignore0) ignore0 = false;
-             if (compress === index) {
-               result += index ? ':' : '::';
-               ignore0 = true;
-             } else {
-               result += host[index].toString(16);
-               if (index < 7) result += ':';
+         return [
+           // `String.prototype.split` method
+           // https://tc39.es/ecma262/#sec-string.prototype.split
+           function split(separator, limit) {
+             var O = requireObjectCoercible$9(this);
+             var splitter = separator == undefined ? undefined : getMethod$2(separator, SPLIT);
+             return splitter
+               ? call$7(splitter, separator, O, limit)
+               : call$7(internalSplit, toString$e(O), separator, limit);
+           },
+           // `RegExp.prototype[@@split]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@split
+           //
+           // NOTE: This cannot be properly polyfilled in engines that don't support
+           // the 'y' flag.
+           function (string, limit) {
+             var rx = anObject$5(this);
+             var S = toString$e(string);
+             var res = maybeCallNative(internalSplit, rx, S, limit, internalSplit !== nativeSplit);
+
+             if (res.done) return res.value;
+
+             var C = speciesConstructor$1(rx, RegExp);
+
+             var unicodeMatching = rx.unicode;
+             var flags = (rx.ignoreCase ? 'i' : '') +
+                         (rx.multiline ? 'm' : '') +
+                         (rx.unicode ? 'u' : '') +
+                         (UNSUPPORTED_Y$1 ? 'g' : 'y');
+
+             // ^(? + rx + ) is needed, in combination with some S slicing, to
+             // simulate the 'y' flag.
+             var splitter = new C(UNSUPPORTED_Y$1 ? '^(?:' + rx.source + ')' : rx, flags);
+             var lim = limit === undefined ? MAX_UINT32 : limit >>> 0;
+             if (lim === 0) return [];
+             if (S.length === 0) return callRegExpExec(splitter, S) === null ? [S] : [];
+             var p = 0;
+             var q = 0;
+             var A = [];
+             while (q < S.length) {
+               splitter.lastIndex = UNSUPPORTED_Y$1 ? 0 : q;
+               var z = callRegExpExec(splitter, UNSUPPORTED_Y$1 ? stringSlice$5(S, q) : S);
+               var e;
+               if (
+                 z === null ||
+                 (e = min$4(toLength$4(splitter.lastIndex + (UNSUPPORTED_Y$1 ? q : 0)), S.length)) === p
+               ) {
+                 q = advanceStringIndex$1(S, q, unicodeMatching);
+               } else {
+                 push$5(A, stringSlice$5(S, p, q));
+                 if (A.length === lim) return A;
+                 for (var i = 1; i <= z.length - 1; i++) {
+                   push$5(A, z[i]);
+                   if (A.length === lim) return A;
+                 }
+                 q = p = e;
+               }
              }
+             push$5(A, stringSlice$5(S, p));
+             return A;
            }
-           return '[' + result + ']';
-         } return host;
-       };
+         ];
+       }, !SPLIT_WORKS_WITH_OVERWRITTEN_EXEC, UNSUPPORTED_Y$1);
 
-       var C0ControlPercentEncodeSet = {};
-       var fragmentPercentEncodeSet = objectAssign({}, C0ControlPercentEncodeSet, {
-         ' ': 1, '"': 1, '<': 1, '>': 1, '`': 1
-       });
-       var pathPercentEncodeSet = objectAssign({}, fragmentPercentEncodeSet, {
-         '#': 1, '?': 1, '{': 1, '}': 1
-       });
-       var userinfoPercentEncodeSet = objectAssign({}, pathPercentEncodeSet, {
-         '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\': 1, ']': 1, '^': 1, '|': 1
-       });
+       // a string of all valid unicode whitespaces
+       var whitespaces$4 = '\u0009\u000A\u000B\u000C\u000D\u0020\u00A0\u1680\u2000\u2001\u2002' +
+         '\u2003\u2004\u2005\u2006\u2007\u2008\u2009\u200A\u202F\u205F\u3000\u2028\u2029\uFEFF';
 
-       var percentEncode = function (char, set) {
-         var code = codeAt(char, 0);
-         return code > 0x20 && code < 0x7F && !has(set, char) ? char : encodeURIComponent(char);
-       };
+       var uncurryThis$o = functionUncurryThis;
+       var requireObjectCoercible$8 = requireObjectCoercible$e;
+       var toString$d = toString$k;
+       var whitespaces$3 = whitespaces$4;
 
-       var specialSchemes = {
-         ftp: 21,
-         file: null,
-         http: 80,
-         https: 443,
-         ws: 80,
-         wss: 443
-       };
+       var replace$4 = uncurryThis$o(''.replace);
+       var whitespace = '[' + whitespaces$3 + ']';
+       var ltrim = RegExp('^' + whitespace + whitespace + '*');
+       var rtrim$2 = RegExp(whitespace + whitespace + '*$');
 
-       var isSpecial = function (url) {
-         return has(specialSchemes, url.scheme);
+       // `String.prototype.{ trim, trimStart, trimEnd, trimLeft, trimRight }` methods implementation
+       var createMethod$2 = function (TYPE) {
+         return function ($this) {
+           var string = toString$d(requireObjectCoercible$8($this));
+           if (TYPE & 1) string = replace$4(string, ltrim, '');
+           if (TYPE & 2) string = replace$4(string, rtrim$2, '');
+           return string;
+         };
        };
 
-       var includesCredentials = function (url) {
-         return url.username != '' || url.password != '';
+       var stringTrim = {
+         // `String.prototype.{ trimLeft, trimStart }` methods
+         // https://tc39.es/ecma262/#sec-string.prototype.trimstart
+         start: createMethod$2(1),
+         // `String.prototype.{ trimRight, trimEnd }` methods
+         // https://tc39.es/ecma262/#sec-string.prototype.trimend
+         end: createMethod$2(2),
+         // `String.prototype.trim` method
+         // https://tc39.es/ecma262/#sec-string.prototype.trim
+         trim: createMethod$2(3)
        };
 
-       var cannotHaveUsernamePasswordPort = function (url) {
-         return !url.host || url.cannotBeABaseURL || url.scheme == 'file';
-       };
+       var PROPER_FUNCTION_NAME = functionName.PROPER;
+       var fails$o = fails$S;
+       var whitespaces$2 = whitespaces$4;
 
-       var isWindowsDriveLetter = function (string, normalized) {
-         var second;
-         return string.length == 2 && ALPHA.test(string.charAt(0))
-           && ((second = string.charAt(1)) == ':' || (!normalized && second == '|'));
-       };
+       var non = '\u200B\u0085\u180E';
 
-       var startsWithWindowsDriveLetter = function (string) {
-         var third;
-         return string.length > 1 && isWindowsDriveLetter(string.slice(0, 2)) && (
-           string.length == 2 ||
-           ((third = string.charAt(2)) === '/' || third === '\\' || third === '?' || third === '#')
-         );
+       // check that a method works with the correct list
+       // of whitespaces and has a correct name
+       var stringTrimForced = function (METHOD_NAME) {
+         return fails$o(function () {
+           return !!whitespaces$2[METHOD_NAME]()
+             || non[METHOD_NAME]() !== non
+             || (PROPER_FUNCTION_NAME && whitespaces$2[METHOD_NAME].name !== METHOD_NAME);
+         });
        };
 
-       var shortenURLsPath = function (url) {
-         var path = url.path;
-         var pathSize = path.length;
-         if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {
-           path.pop();
+       var $$W = _export;
+       var $trim = stringTrim.trim;
+       var forcedStringTrimMethod$2 = stringTrimForced;
+
+       // `String.prototype.trim` method
+       // https://tc39.es/ecma262/#sec-string.prototype.trim
+       $$W({ target: 'String', proto: true, forced: forcedStringTrimMethod$2('trim') }, {
+         trim: function trim() {
+           return $trim(this);
          }
-       };
+       });
 
-       var isSingleDot = function (segment) {
-         return segment === '.' || segment.toLowerCase() === '%2e';
-       };
+       var DESCRIPTORS$b = descriptors;
+       var FUNCTION_NAME_EXISTS = functionName.EXISTS;
+       var uncurryThis$n = functionUncurryThis;
+       var defineProperty$5 = objectDefineProperty.f;
 
-       var isDoubleDot = function (segment) {
-         segment = segment.toLowerCase();
-         return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
-       };
+       var FunctionPrototype = Function.prototype;
+       var functionToString = uncurryThis$n(FunctionPrototype.toString);
+       var nameRE = /^\s*function ([^ (]*)/;
+       var regExpExec$2 = uncurryThis$n(nameRE.exec);
+       var NAME = 'name';
 
-       // States:
-       var SCHEME_START = {};
-       var SCHEME = {};
-       var NO_SCHEME = {};
-       var SPECIAL_RELATIVE_OR_AUTHORITY = {};
-       var PATH_OR_AUTHORITY = {};
-       var RELATIVE = {};
-       var RELATIVE_SLASH = {};
-       var SPECIAL_AUTHORITY_SLASHES = {};
-       var SPECIAL_AUTHORITY_IGNORE_SLASHES = {};
-       var AUTHORITY = {};
-       var HOST = {};
-       var HOSTNAME = {};
-       var PORT = {};
-       var FILE = {};
-       var FILE_SLASH = {};
-       var FILE_HOST = {};
-       var PATH_START = {};
-       var PATH = {};
-       var CANNOT_BE_A_BASE_URL_PATH = {};
-       var QUERY = {};
-       var FRAGMENT = {};
+       // Function instances `.name` property
+       // https://tc39.es/ecma262/#sec-function-instances-name
+       if (DESCRIPTORS$b && !FUNCTION_NAME_EXISTS) {
+         defineProperty$5(FunctionPrototype, NAME, {
+           configurable: true,
+           get: function () {
+             try {
+               return regExpExec$2(nameRE, functionToString(this))[1];
+             } catch (error) {
+               return '';
+             }
+           }
+         });
+       }
 
-       // eslint-disable-next-line max-statements
-       var parseURL = function (url, input, stateOverride, base) {
-         var state = stateOverride || SCHEME_START;
-         var pointer = 0;
-         var buffer = '';
-         var seenAt = false;
-         var seenBracket = false;
-         var seenPasswordToken = false;
-         var codePoints, char, bufferCodePoints, failure;
+       var $$V = _export;
+       var DESCRIPTORS$a = descriptors;
+       var create$5 = objectCreate;
 
-         if (!stateOverride) {
-           url.scheme = '';
-           url.username = '';
-           url.password = '';
-           url.host = null;
-           url.port = null;
-           url.path = [];
-           url.query = null;
-           url.fragment = null;
-           url.cannotBeABaseURL = false;
-           input = input.replace(LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');
-         }
+       // `Object.create` method
+       // https://tc39.es/ecma262/#sec-object.create
+       $$V({ target: 'Object', stat: true, sham: !DESCRIPTORS$a }, {
+         create: create$5
+       });
 
-         input = input.replace(TAB_AND_NEW_LINE, '');
+       var $$U = _export;
+       var global$l = global$1m;
+       var apply$1 = functionApply;
+       var isCallable$2 = isCallable$r;
+       var userAgent$1 = engineUserAgent;
+       var arraySlice$3 = arraySlice$c;
 
-         codePoints = arrayFrom(input);
+       var MSIE = /MSIE .\./.test(userAgent$1); // <- dirty ie9- check
+       var Function$2 = global$l.Function;
 
-         while (pointer <= codePoints.length) {
-           char = codePoints[pointer];
-           switch (state) {
-             case SCHEME_START:
-               if (char && ALPHA.test(char)) {
-                 buffer += char.toLowerCase();
-                 state = SCHEME;
-               } else if (!stateOverride) {
-                 state = NO_SCHEME;
-                 continue;
-               } else return INVALID_SCHEME;
-               break;
+       var wrap$1 = function (scheduler) {
+         return function (handler, timeout /* , ...arguments */) {
+           var boundArgs = arguments.length > 2;
+           var args = boundArgs ? arraySlice$3(arguments, 2) : undefined;
+           return scheduler(boundArgs ? function () {
+             apply$1(isCallable$2(handler) ? handler : Function$2(handler), this, args);
+           } : handler, timeout);
+         };
+       };
 
-             case SCHEME:
-               if (char && (ALPHANUMERIC.test(char) || char == '+' || char == '-' || char == '.')) {
-                 buffer += char.toLowerCase();
-               } else if (char == ':') {
-                 if (stateOverride && (
-                   (isSpecial(url) != has(specialSchemes, buffer)) ||
-                   (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||
-                   (url.scheme == 'file' && !url.host)
-                 )) return;
-                 url.scheme = buffer;
-                 if (stateOverride) {
-                   if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;
-                   return;
-                 }
-                 buffer = '';
-                 if (url.scheme == 'file') {
-                   state = FILE;
-                 } else if (isSpecial(url) && base && base.scheme == url.scheme) {
-                   state = SPECIAL_RELATIVE_OR_AUTHORITY;
-                 } else if (isSpecial(url)) {
-                   state = SPECIAL_AUTHORITY_SLASHES;
-                 } else if (codePoints[pointer + 1] == '/') {
-                   state = PATH_OR_AUTHORITY;
-                   pointer++;
-                 } else {
-                   url.cannotBeABaseURL = true;
-                   url.path.push('');
-                   state = CANNOT_BE_A_BASE_URL_PATH;
-                 }
-               } else if (!stateOverride) {
-                 buffer = '';
-                 state = NO_SCHEME;
-                 pointer = 0;
-                 continue;
-               } else return INVALID_SCHEME;
-               break;
-
-             case NO_SCHEME:
-               if (!base || (base.cannotBeABaseURL && char != '#')) return INVALID_SCHEME;
-               if (base.cannotBeABaseURL && char == '#') {
-                 url.scheme = base.scheme;
-                 url.path = base.path.slice();
-                 url.query = base.query;
-                 url.fragment = '';
-                 url.cannotBeABaseURL = true;
-                 state = FRAGMENT;
-                 break;
-               }
-               state = base.scheme == 'file' ? FILE : RELATIVE;
-               continue;
-
-             case SPECIAL_RELATIVE_OR_AUTHORITY:
-               if (char == '/' && codePoints[pointer + 1] == '/') {
-                 state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
-                 pointer++;
-               } else {
-                 state = RELATIVE;
-                 continue;
-               } break;
+       // ie9- setTimeout & setInterval additional parameters fix
+       // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#timers
+       $$U({ global: true, bind: true, forced: MSIE }, {
+         // `setTimeout` method
+         // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-settimeout
+         setTimeout: wrap$1(global$l.setTimeout),
+         // `setInterval` method
+         // https://html.spec.whatwg.org/multipage/timers-and-user-prompts.html#dom-setinterval
+         setInterval: wrap$1(global$l.setInterval)
+       });
 
-             case PATH_OR_AUTHORITY:
-               if (char == '/') {
-                 state = AUTHORITY;
-                 break;
-               } else {
-                 state = PATH;
-                 continue;
-               }
+       var global$k = typeof globalThis !== 'undefined' && globalThis || typeof self !== 'undefined' && self || typeof global$k !== 'undefined' && global$k;
+       var support = {
+         searchParams: 'URLSearchParams' in global$k,
+         iterable: 'Symbol' in global$k && 'iterator' in Symbol,
+         blob: 'FileReader' in global$k && 'Blob' in global$k && function () {
+           try {
+             new Blob();
+             return true;
+           } catch (e) {
+             return false;
+           }
+         }(),
+         formData: 'FormData' in global$k,
+         arrayBuffer: 'ArrayBuffer' in global$k
+       };
 
-             case RELATIVE:
-               url.scheme = base.scheme;
-               if (char == EOF) {
-                 url.username = base.username;
-                 url.password = base.password;
-                 url.host = base.host;
-                 url.port = base.port;
-                 url.path = base.path.slice();
-                 url.query = base.query;
-               } else if (char == '/' || (char == '\\' && isSpecial(url))) {
-                 state = RELATIVE_SLASH;
-               } else if (char == '?') {
-                 url.username = base.username;
-                 url.password = base.password;
-                 url.host = base.host;
-                 url.port = base.port;
-                 url.path = base.path.slice();
-                 url.query = '';
-                 state = QUERY;
-               } else if (char == '#') {
-                 url.username = base.username;
-                 url.password = base.password;
-                 url.host = base.host;
-                 url.port = base.port;
-                 url.path = base.path.slice();
-                 url.query = base.query;
-                 url.fragment = '';
-                 state = FRAGMENT;
-               } else {
-                 url.username = base.username;
-                 url.password = base.password;
-                 url.host = base.host;
-                 url.port = base.port;
-                 url.path = base.path.slice();
-                 url.path.pop();
-                 state = PATH;
-                 continue;
-               } break;
+       function isDataView(obj) {
+         return obj && DataView.prototype.isPrototypeOf(obj);
+       }
 
-             case RELATIVE_SLASH:
-               if (isSpecial(url) && (char == '/' || char == '\\')) {
-                 state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
-               } else if (char == '/') {
-                 state = AUTHORITY;
-               } else {
-                 url.username = base.username;
-                 url.password = base.password;
-                 url.host = base.host;
-                 url.port = base.port;
-                 state = PATH;
-                 continue;
-               } break;
+       if (support.arrayBuffer) {
+         var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
 
-             case SPECIAL_AUTHORITY_SLASHES:
-               state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
-               if (char != '/' || buffer.charAt(pointer + 1) != '/') continue;
-               pointer++;
-               break;
+         var isArrayBufferView = ArrayBuffer.isView || function (obj) {
+           return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
+         };
+       }
 
-             case SPECIAL_AUTHORITY_IGNORE_SLASHES:
-               if (char != '/' && char != '\\') {
-                 state = AUTHORITY;
-                 continue;
-               } break;
+       function normalizeName(name) {
+         if (typeof name !== 'string') {
+           name = String(name);
+         }
 
-             case AUTHORITY:
-               if (char == '@') {
-                 if (seenAt) buffer = '%40' + buffer;
-                 seenAt = true;
-                 bufferCodePoints = arrayFrom(buffer);
-                 for (var i = 0; i < bufferCodePoints.length; i++) {
-                   var codePoint = bufferCodePoints[i];
-                   if (codePoint == ':' && !seenPasswordToken) {
-                     seenPasswordToken = true;
-                     continue;
-                   }
-                   var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);
-                   if (seenPasswordToken) url.password += encodedCodePoints;
-                   else url.username += encodedCodePoints;
-                 }
-                 buffer = '';
-               } else if (
-                 char == EOF || char == '/' || char == '?' || char == '#' ||
-                 (char == '\\' && isSpecial(url))
-               ) {
-                 if (seenAt && buffer == '') return INVALID_AUTHORITY;
-                 pointer -= arrayFrom(buffer).length + 1;
-                 buffer = '';
-                 state = HOST;
-               } else buffer += char;
-               break;
+         if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
+           throw new TypeError('Invalid character in header field name: "' + name + '"');
+         }
 
-             case HOST:
-             case HOSTNAME:
-               if (stateOverride && url.scheme == 'file') {
-                 state = FILE_HOST;
-                 continue;
-               } else if (char == ':' && !seenBracket) {
-                 if (buffer == '') return INVALID_HOST;
-                 failure = parseHost(url, buffer);
-                 if (failure) return failure;
-                 buffer = '';
-                 state = PORT;
-                 if (stateOverride == HOSTNAME) return;
-               } else if (
-                 char == EOF || char == '/' || char == '?' || char == '#' ||
-                 (char == '\\' && isSpecial(url))
-               ) {
-                 if (isSpecial(url) && buffer == '') return INVALID_HOST;
-                 if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;
-                 failure = parseHost(url, buffer);
-                 if (failure) return failure;
-                 buffer = '';
-                 state = PATH_START;
-                 if (stateOverride) return;
-                 continue;
-               } else {
-                 if (char == '[') seenBracket = true;
-                 else if (char == ']') seenBracket = false;
-                 buffer += char;
-               } break;
+         return name.toLowerCase();
+       }
 
-             case PORT:
-               if (DIGIT.test(char)) {
-                 buffer += char;
-               } else if (
-                 char == EOF || char == '/' || char == '?' || char == '#' ||
-                 (char == '\\' && isSpecial(url)) ||
-                 stateOverride
-               ) {
-                 if (buffer != '') {
-                   var port = parseInt(buffer, 10);
-                   if (port > 0xFFFF) return INVALID_PORT;
-                   url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;
-                   buffer = '';
-                 }
-                 if (stateOverride) return;
-                 state = PATH_START;
-                 continue;
-               } else return INVALID_PORT;
-               break;
+       function normalizeValue(value) {
+         if (typeof value !== 'string') {
+           value = String(value);
+         }
 
-             case FILE:
-               url.scheme = 'file';
-               if (char == '/' || char == '\\') state = FILE_SLASH;
-               else if (base && base.scheme == 'file') {
-                 if (char == EOF) {
-                   url.host = base.host;
-                   url.path = base.path.slice();
-                   url.query = base.query;
-                 } else if (char == '?') {
-                   url.host = base.host;
-                   url.path = base.path.slice();
-                   url.query = '';
-                   state = QUERY;
-                 } else if (char == '#') {
-                   url.host = base.host;
-                   url.path = base.path.slice();
-                   url.query = base.query;
-                   url.fragment = '';
-                   state = FRAGMENT;
-                 } else {
-                   if (!startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
-                     url.host = base.host;
-                     url.path = base.path.slice();
-                     shortenURLsPath(url);
-                   }
-                   state = PATH;
-                   continue;
-                 }
-               } else {
-                 state = PATH;
-                 continue;
-               } break;
+         return value;
+       } // Build a destructive iterator for the value list
 
-             case FILE_SLASH:
-               if (char == '/' || char == '\\') {
-                 state = FILE_HOST;
-                 break;
-               }
-               if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(codePoints.slice(pointer).join(''))) {
-                 if (isWindowsDriveLetter(base.path[0], true)) url.path.push(base.path[0]);
-                 else url.host = base.host;
-               }
-               state = PATH;
-               continue;
 
-             case FILE_HOST:
-               if (char == EOF || char == '/' || char == '\\' || char == '?' || char == '#') {
-                 if (!stateOverride && isWindowsDriveLetter(buffer)) {
-                   state = PATH;
-                 } else if (buffer == '') {
-                   url.host = '';
-                   if (stateOverride) return;
-                   state = PATH_START;
-                 } else {
-                   failure = parseHost(url, buffer);
-                   if (failure) return failure;
-                   if (url.host == 'localhost') url.host = '';
-                   if (stateOverride) return;
-                   buffer = '';
-                   state = PATH_START;
-                 } continue;
-               } else buffer += char;
-               break;
+       function iteratorFor(items) {
+         var iterator = {
+           next: function next() {
+             var value = items.shift();
+             return {
+               done: value === undefined,
+               value: value
+             };
+           }
+         };
 
-             case PATH_START:
-               if (isSpecial(url)) {
-                 state = PATH;
-                 if (char != '/' && char != '\\') continue;
-               } else if (!stateOverride && char == '?') {
-                 url.query = '';
-                 state = QUERY;
-               } else if (!stateOverride && char == '#') {
-                 url.fragment = '';
-                 state = FRAGMENT;
-               } else if (char != EOF) {
-                 state = PATH;
-                 if (char != '/') continue;
-               } break;
+         if (support.iterable) {
+           iterator[Symbol.iterator] = function () {
+             return iterator;
+           };
+         }
 
-             case PATH:
-               if (
-                 char == EOF || char == '/' ||
-                 (char == '\\' && isSpecial(url)) ||
-                 (!stateOverride && (char == '?' || char == '#'))
-               ) {
-                 if (isDoubleDot(buffer)) {
-                   shortenURLsPath(url);
-                   if (char != '/' && !(char == '\\' && isSpecial(url))) {
-                     url.path.push('');
-                   }
-                 } else if (isSingleDot(buffer)) {
-                   if (char != '/' && !(char == '\\' && isSpecial(url))) {
-                     url.path.push('');
-                   }
-                 } else {
-                   if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {
-                     if (url.host) url.host = '';
-                     buffer = buffer.charAt(0) + ':'; // normalize windows drive letter
-                   }
-                   url.path.push(buffer);
-                 }
-                 buffer = '';
-                 if (url.scheme == 'file' && (char == EOF || char == '?' || char == '#')) {
-                   while (url.path.length > 1 && url.path[0] === '') {
-                     url.path.shift();
-                   }
-                 }
-                 if (char == '?') {
-                   url.query = '';
-                   state = QUERY;
-                 } else if (char == '#') {
-                   url.fragment = '';
-                   state = FRAGMENT;
-                 }
-               } else {
-                 buffer += percentEncode(char, pathPercentEncodeSet);
-               } break;
+         return iterator;
+       }
 
-             case CANNOT_BE_A_BASE_URL_PATH:
-               if (char == '?') {
-                 url.query = '';
-                 state = QUERY;
-               } else if (char == '#') {
-                 url.fragment = '';
-                 state = FRAGMENT;
-               } else if (char != EOF) {
-                 url.path[0] += percentEncode(char, C0ControlPercentEncodeSet);
-               } break;
+       function Headers(headers) {
+         this.map = {};
 
-             case QUERY:
-               if (!stateOverride && char == '#') {
-                 url.fragment = '';
-                 state = FRAGMENT;
-               } else if (char != EOF) {
-                 if (char == "'" && isSpecial(url)) url.query += '%27';
-                 else if (char == '#') url.query += '%23';
-                 else url.query += percentEncode(char, C0ControlPercentEncodeSet);
-               } break;
+         if (headers instanceof Headers) {
+           headers.forEach(function (value, name) {
+             this.append(name, value);
+           }, this);
+         } else if (Array.isArray(headers)) {
+           headers.forEach(function (header) {
+             this.append(header[0], header[1]);
+           }, this);
+         } else if (headers) {
+           Object.getOwnPropertyNames(headers).forEach(function (name) {
+             this.append(name, headers[name]);
+           }, this);
+         }
+       }
 
-             case FRAGMENT:
-               if (char != EOF) url.fragment += percentEncode(char, fragmentPercentEncodeSet);
-               break;
-           }
+       Headers.prototype.append = function (name, value) {
+         name = normalizeName(name);
+         value = normalizeValue(value);
+         var oldValue = this.map[name];
+         this.map[name] = oldValue ? oldValue + ', ' + value : value;
+       };
 
-           pointer++;
-         }
+       Headers.prototype['delete'] = function (name) {
+         delete this.map[normalizeName(name)];
        };
 
-       // `URL` constructor
-       // https://url.spec.whatwg.org/#url-class
-       var URLConstructor = function URL(url /* , base */) {
-         var that = anInstance(this, URLConstructor, 'URL');
-         var base = arguments.length > 1 ? arguments[1] : undefined;
-         var urlString = String(url);
-         var state = setInternalState$6(that, { type: 'URL' });
-         var baseState, failure;
-         if (base !== undefined) {
-           if (base instanceof URLConstructor) baseState = getInternalURLState(base);
-           else {
-             failure = parseURL(baseState = {}, String(base));
-             if (failure) throw TypeError(failure);
-           }
-         }
-         failure = parseURL(state, urlString, null, baseState);
-         if (failure) throw TypeError(failure);
-         var searchParams = state.searchParams = new URLSearchParams$1();
-         var searchParamsState = getInternalSearchParamsState(searchParams);
-         searchParamsState.updateSearchParams(state.query);
-         searchParamsState.updateURL = function () {
-           state.query = String(searchParams) || null;
-         };
-         if (!descriptors) {
-           that.href = serializeURL.call(that);
-           that.origin = getOrigin.call(that);
-           that.protocol = getProtocol.call(that);
-           that.username = getUsername.call(that);
-           that.password = getPassword.call(that);
-           that.host = getHost.call(that);
-           that.hostname = getHostname.call(that);
-           that.port = getPort.call(that);
-           that.pathname = getPathname.call(that);
-           that.search = getSearch.call(that);
-           that.searchParams = getSearchParams.call(that);
-           that.hash = getHash.call(that);
-         }
+       Headers.prototype.get = function (name) {
+         name = normalizeName(name);
+         return this.has(name) ? this.map[name] : null;
        };
 
-       var URLPrototype = URLConstructor.prototype;
+       Headers.prototype.has = function (name) {
+         return this.map.hasOwnProperty(normalizeName(name));
+       };
 
-       var serializeURL = function () {
-         var url = getInternalURLState(this);
-         var scheme = url.scheme;
-         var username = url.username;
-         var password = url.password;
-         var host = url.host;
-         var port = url.port;
-         var path = url.path;
-         var query = url.query;
-         var fragment = url.fragment;
-         var output = scheme + ':';
-         if (host !== null) {
-           output += '//';
-           if (includesCredentials(url)) {
-             output += username + (password ? ':' + password : '') + '@';
-           }
-           output += serializeHost(host);
-           if (port !== null) output += ':' + port;
-         } else if (scheme == 'file') output += '//';
-         output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
-         if (query !== null) output += '?' + query;
-         if (fragment !== null) output += '#' + fragment;
-         return output;
+       Headers.prototype.set = function (name, value) {
+         this.map[normalizeName(name)] = normalizeValue(value);
        };
 
-       var getOrigin = function () {
-         var url = getInternalURLState(this);
-         var scheme = url.scheme;
-         var port = url.port;
-         if (scheme == 'blob') try {
-           return new URL(scheme.path[0]).origin;
-         } catch (error) {
-           return 'null';
+       Headers.prototype.forEach = function (callback, thisArg) {
+         for (var name in this.map) {
+           if (this.map.hasOwnProperty(name)) {
+             callback.call(thisArg, this.map[name], name, this);
+           }
          }
-         if (scheme == 'file' || !isSpecial(url)) return 'null';
-         return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');
        };
 
-       var getProtocol = function () {
-         return getInternalURLState(this).scheme + ':';
+       Headers.prototype.keys = function () {
+         var items = [];
+         this.forEach(function (value, name) {
+           items.push(name);
+         });
+         return iteratorFor(items);
        };
 
-       var getUsername = function () {
-         return getInternalURLState(this).username;
+       Headers.prototype.values = function () {
+         var items = [];
+         this.forEach(function (value) {
+           items.push(value);
+         });
+         return iteratorFor(items);
        };
 
-       var getPassword = function () {
-         return getInternalURLState(this).password;
+       Headers.prototype.entries = function () {
+         var items = [];
+         this.forEach(function (value, name) {
+           items.push([name, value]);
+         });
+         return iteratorFor(items);
        };
 
-       var getHost = function () {
-         var url = getInternalURLState(this);
-         var host = url.host;
-         var port = url.port;
-         return host === null ? ''
-           : port === null ? serializeHost(host)
-           : serializeHost(host) + ':' + port;
-       };
+       if (support.iterable) {
+         Headers.prototype[Symbol.iterator] = Headers.prototype.entries;
+       }
 
-       var getHostname = function () {
-         var host = getInternalURLState(this).host;
-         return host === null ? '' : serializeHost(host);
-       };
+       function consumed(body) {
+         if (body.bodyUsed) {
+           return Promise.reject(new TypeError('Already read'));
+         }
 
-       var getPort = function () {
-         var port = getInternalURLState(this).port;
-         return port === null ? '' : String(port);
-       };
+         body.bodyUsed = true;
+       }
 
-       var getPathname = function () {
-         var url = getInternalURLState(this);
-         var path = url.path;
-         return url.cannotBeABaseURL ? path[0] : path.length ? '/' + path.join('/') : '';
-       };
+       function fileReaderReady(reader) {
+         return new Promise(function (resolve, reject) {
+           reader.onload = function () {
+             resolve(reader.result);
+           };
 
-       var getSearch = function () {
-         var query = getInternalURLState(this).query;
-         return query ? '?' + query : '';
-       };
+           reader.onerror = function () {
+             reject(reader.error);
+           };
+         });
+       }
 
-       var getSearchParams = function () {
-         return getInternalURLState(this).searchParams;
-       };
+       function readBlobAsArrayBuffer(blob) {
+         var reader = new FileReader();
+         var promise = fileReaderReady(reader);
+         reader.readAsArrayBuffer(blob);
+         return promise;
+       }
 
-       var getHash = function () {
-         var fragment = getInternalURLState(this).fragment;
-         return fragment ? '#' + fragment : '';
-       };
+       function readBlobAsText(blob) {
+         var reader = new FileReader();
+         var promise = fileReaderReady(reader);
+         reader.readAsText(blob);
+         return promise;
+       }
 
-       var accessorDescriptor = function (getter, setter) {
-         return { get: getter, set: setter, configurable: true, enumerable: true };
-       };
-
-       if (descriptors) {
-         objectDefineProperties(URLPrototype, {
-           // `URL.prototype.href` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-href
-           href: accessorDescriptor(serializeURL, function (href) {
-             var url = getInternalURLState(this);
-             var urlString = String(href);
-             var failure = parseURL(url, urlString);
-             if (failure) throw TypeError(failure);
-             getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
-           }),
-           // `URL.prototype.origin` getter
-           // https://url.spec.whatwg.org/#dom-url-origin
-           origin: accessorDescriptor(getOrigin),
-           // `URL.prototype.protocol` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-protocol
-           protocol: accessorDescriptor(getProtocol, function (protocol) {
-             var url = getInternalURLState(this);
-             parseURL(url, String(protocol) + ':', SCHEME_START);
-           }),
-           // `URL.prototype.username` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-username
-           username: accessorDescriptor(getUsername, function (username) {
-             var url = getInternalURLState(this);
-             var codePoints = arrayFrom(String(username));
-             if (cannotHaveUsernamePasswordPort(url)) return;
-             url.username = '';
-             for (var i = 0; i < codePoints.length; i++) {
-               url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);
-             }
-           }),
-           // `URL.prototype.password` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-password
-           password: accessorDescriptor(getPassword, function (password) {
-             var url = getInternalURLState(this);
-             var codePoints = arrayFrom(String(password));
-             if (cannotHaveUsernamePasswordPort(url)) return;
-             url.password = '';
-             for (var i = 0; i < codePoints.length; i++) {
-               url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);
-             }
-           }),
-           // `URL.prototype.host` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-host
-           host: accessorDescriptor(getHost, function (host) {
-             var url = getInternalURLState(this);
-             if (url.cannotBeABaseURL) return;
-             parseURL(url, String(host), HOST);
-           }),
-           // `URL.prototype.hostname` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-hostname
-           hostname: accessorDescriptor(getHostname, function (hostname) {
-             var url = getInternalURLState(this);
-             if (url.cannotBeABaseURL) return;
-             parseURL(url, String(hostname), HOSTNAME);
-           }),
-           // `URL.prototype.port` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-port
-           port: accessorDescriptor(getPort, function (port) {
-             var url = getInternalURLState(this);
-             if (cannotHaveUsernamePasswordPort(url)) return;
-             port = String(port);
-             if (port == '') url.port = null;
-             else parseURL(url, port, PORT);
-           }),
-           // `URL.prototype.pathname` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-pathname
-           pathname: accessorDescriptor(getPathname, function (pathname) {
-             var url = getInternalURLState(this);
-             if (url.cannotBeABaseURL) return;
-             url.path = [];
-             parseURL(url, pathname + '', PATH_START);
-           }),
-           // `URL.prototype.search` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-search
-           search: accessorDescriptor(getSearch, function (search) {
-             var url = getInternalURLState(this);
-             search = String(search);
-             if (search == '') {
-               url.query = null;
-             } else {
-               if ('?' == search.charAt(0)) search = search.slice(1);
-               url.query = '';
-               parseURL(url, search, QUERY);
-             }
-             getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
-           }),
-           // `URL.prototype.searchParams` getter
-           // https://url.spec.whatwg.org/#dom-url-searchparams
-           searchParams: accessorDescriptor(getSearchParams),
-           // `URL.prototype.hash` accessors pair
-           // https://url.spec.whatwg.org/#dom-url-hash
-           hash: accessorDescriptor(getHash, function (hash) {
-             var url = getInternalURLState(this);
-             hash = String(hash);
-             if (hash == '') {
-               url.fragment = null;
-               return;
-             }
-             if ('#' == hash.charAt(0)) hash = hash.slice(1);
-             url.fragment = '';
-             parseURL(url, hash, FRAGMENT);
-           })
-         });
-       }
-
-       // `URL.prototype.toJSON` method
-       // https://url.spec.whatwg.org/#dom-url-tojson
-       redefine(URLPrototype, 'toJSON', function toJSON() {
-         return serializeURL.call(this);
-       }, { enumerable: true });
-
-       // `URL.prototype.toString` method
-       // https://url.spec.whatwg.org/#URL-stringification-behavior
-       redefine(URLPrototype, 'toString', function toString() {
-         return serializeURL.call(this);
-       }, { enumerable: true });
-
-       if (NativeURL) {
-         var nativeCreateObjectURL = NativeURL.createObjectURL;
-         var nativeRevokeObjectURL = NativeURL.revokeObjectURL;
-         // `URL.createObjectURL` method
-         // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
-         // eslint-disable-next-line no-unused-vars
-         if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', function createObjectURL(blob) {
-           return nativeCreateObjectURL.apply(NativeURL, arguments);
-         });
-         // `URL.revokeObjectURL` method
-         // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL
-         // eslint-disable-next-line no-unused-vars
-         if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', function revokeObjectURL(url) {
-           return nativeRevokeObjectURL.apply(NativeURL, arguments);
-         });
-       }
-
-       setToStringTag(URLConstructor, 'URL');
-
-       _export({ global: true, forced: !nativeUrl, sham: !descriptors }, {
-         URL: URLConstructor
-       });
-
-       function _typeof(obj) {
-         "@babel/helpers - typeof";
-
-         if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") {
-           _typeof = function (obj) {
-             return typeof obj;
-           };
-         } else {
-           _typeof = function (obj) {
-             return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj;
-           };
-         }
-
-         return _typeof(obj);
-       }
-
-       function _classCallCheck(instance, Constructor) {
-         if (!(instance instanceof Constructor)) {
-           throw new TypeError("Cannot call a class as a function");
-         }
-       }
-
-       function _defineProperties(target, props) {
-         for (var i = 0; i < props.length; i++) {
-           var descriptor = props[i];
-           descriptor.enumerable = descriptor.enumerable || false;
-           descriptor.configurable = true;
-           if ("value" in descriptor) descriptor.writable = true;
-           Object.defineProperty(target, descriptor.key, descriptor);
-         }
-       }
-
-       function _createClass(Constructor, protoProps, staticProps) {
-         if (protoProps) _defineProperties(Constructor.prototype, protoProps);
-         if (staticProps) _defineProperties(Constructor, staticProps);
-         return Constructor;
-       }
-
-       function _defineProperty(obj, key, value) {
-         if (key in obj) {
-           Object.defineProperty(obj, key, {
-             value: value,
-             enumerable: true,
-             configurable: true,
-             writable: true
-           });
-         } else {
-           obj[key] = value;
-         }
-
-         return obj;
-       }
-
-       function _slicedToArray(arr, i) {
-         return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest();
-       }
-
-       function _toConsumableArray(arr) {
-         return _arrayWithoutHoles(arr) || _iterableToArray(arr) || _unsupportedIterableToArray(arr) || _nonIterableSpread();
-       }
-
-       function _arrayWithoutHoles(arr) {
-         if (Array.isArray(arr)) return _arrayLikeToArray(arr);
-       }
-
-       function _arrayWithHoles(arr) {
-         if (Array.isArray(arr)) return arr;
-       }
-
-       function _iterableToArray(iter) {
-         if (typeof Symbol !== "undefined" && Symbol.iterator in Object(iter)) return Array.from(iter);
-       }
-
-       function _iterableToArrayLimit(arr, i) {
-         if (typeof Symbol === "undefined" || !(Symbol.iterator in Object(arr))) return;
-         var _arr = [];
-         var _n = true;
-         var _d = false;
-         var _e = undefined;
-
-         try {
-           for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) {
-             _arr.push(_s.value);
-
-             if (i && _arr.length === i) break;
-           }
-         } catch (err) {
-           _d = true;
-           _e = err;
-         } finally {
-           try {
-             if (!_n && _i["return"] != null) _i["return"]();
-           } finally {
-             if (_d) throw _e;
-           }
-         }
-
-         return _arr;
-       }
-
-       function _unsupportedIterableToArray(o, minLen) {
-         if (!o) return;
-         if (typeof o === "string") return _arrayLikeToArray(o, minLen);
-         var n = Object.prototype.toString.call(o).slice(8, -1);
-         if (n === "Object" && o.constructor) n = o.constructor.name;
-         if (n === "Map" || n === "Set") return Array.from(o);
-         if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen);
-       }
-
-       function _arrayLikeToArray(arr, len) {
-         if (len == null || len > arr.length) len = arr.length;
-
-         for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i];
-
-         return arr2;
-       }
-
-       function _nonIterableSpread() {
-         throw new TypeError("Invalid attempt to spread non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
-       }
-
-       function _nonIterableRest() {
-         throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
-       }
-
-       function _createForOfIteratorHelper(o, allowArrayLike) {
-         var it;
-
-         if (typeof Symbol === "undefined" || o[Symbol.iterator] == null) {
-           if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") {
-             if (it) o = it;
-             var i = 0;
-
-             var F = function () {};
-
-             return {
-               s: F,
-               n: function () {
-                 if (i >= o.length) return {
-                   done: true
-                 };
-                 return {
-                   done: false,
-                   value: o[i++]
-                 };
-               },
-               e: function (e) {
-                 throw e;
-               },
-               f: F
-             };
-           }
-
-           throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method.");
-         }
-
-         var normalCompletion = true,
-             didErr = false,
-             err;
-         return {
-           s: function () {
-             it = o[Symbol.iterator]();
-           },
-           n: function () {
-             var step = it.next();
-             normalCompletion = step.done;
-             return step;
-           },
-           e: function (e) {
-             didErr = true;
-             err = e;
-           },
-           f: function () {
-             try {
-               if (!normalCompletion && it.return != null) it.return();
-             } finally {
-               if (didErr) throw err;
-             }
-           }
-         };
-       }
-
-       var global$1 = typeof globalThis !== 'undefined' && globalThis || typeof self !== 'undefined' && self || typeof global$1 !== 'undefined' && global$1;
-       var support = {
-         searchParams: 'URLSearchParams' in global$1,
-         iterable: 'Symbol' in global$1 && 'iterator' in Symbol,
-         blob: 'FileReader' in global$1 && 'Blob' in global$1 && function () {
-           try {
-             new Blob();
-             return true;
-           } catch (e) {
-             return false;
-           }
-         }(),
-         formData: 'FormData' in global$1,
-         arrayBuffer: 'ArrayBuffer' in global$1
-       };
-
-       function isDataView(obj) {
-         return obj && DataView.prototype.isPrototypeOf(obj);
-       }
-
-       if (support.arrayBuffer) {
-         var viewClasses = ['[object Int8Array]', '[object Uint8Array]', '[object Uint8ClampedArray]', '[object Int16Array]', '[object Uint16Array]', '[object Int32Array]', '[object Uint32Array]', '[object Float32Array]', '[object Float64Array]'];
-
-         var isArrayBufferView = ArrayBuffer.isView || function (obj) {
-           return obj && viewClasses.indexOf(Object.prototype.toString.call(obj)) > -1;
-         };
-       }
-
-       function normalizeName(name) {
-         if (typeof name !== 'string') {
-           name = String(name);
-         }
-
-         if (/[^a-z0-9\-#$%&'*+.^_`|~!]/i.test(name) || name === '') {
-           throw new TypeError('Invalid character in header field name');
-         }
-
-         return name.toLowerCase();
-       }
-
-       function normalizeValue(value) {
-         if (typeof value !== 'string') {
-           value = String(value);
-         }
-
-         return value;
-       } // Build a destructive iterator for the value list
-
-
-       function iteratorFor(items) {
-         var iterator = {
-           next: function next() {
-             var value = items.shift();
-             return {
-               done: value === undefined,
-               value: value
-             };
-           }
-         };
-
-         if (support.iterable) {
-           iterator[Symbol.iterator] = function () {
-             return iterator;
-           };
-         }
-
-         return iterator;
-       }
-
-       function Headers$1(headers) {
-         this.map = {};
-
-         if (headers instanceof Headers$1) {
-           headers.forEach(function (value, name) {
-             this.append(name, value);
-           }, this);
-         } else if (Array.isArray(headers)) {
-           headers.forEach(function (header) {
-             this.append(header[0], header[1]);
-           }, this);
-         } else if (headers) {
-           Object.getOwnPropertyNames(headers).forEach(function (name) {
-             this.append(name, headers[name]);
-           }, this);
-         }
-       }
-
-       Headers$1.prototype.append = function (name, value) {
-         name = normalizeName(name);
-         value = normalizeValue(value);
-         var oldValue = this.map[name];
-         this.map[name] = oldValue ? oldValue + ', ' + value : value;
-       };
-
-       Headers$1.prototype['delete'] = function (name) {
-         delete this.map[normalizeName(name)];
-       };
-
-       Headers$1.prototype.get = function (name) {
-         name = normalizeName(name);
-         return this.has(name) ? this.map[name] : null;
-       };
-
-       Headers$1.prototype.has = function (name) {
-         return this.map.hasOwnProperty(normalizeName(name));
-       };
-
-       Headers$1.prototype.set = function (name, value) {
-         this.map[normalizeName(name)] = normalizeValue(value);
-       };
-
-       Headers$1.prototype.forEach = function (callback, thisArg) {
-         for (var name in this.map) {
-           if (this.map.hasOwnProperty(name)) {
-             callback.call(thisArg, this.map[name], name, this);
-           }
-         }
-       };
-
-       Headers$1.prototype.keys = function () {
-         var items = [];
-         this.forEach(function (value, name) {
-           items.push(name);
-         });
-         return iteratorFor(items);
-       };
-
-       Headers$1.prototype.values = function () {
-         var items = [];
-         this.forEach(function (value) {
-           items.push(value);
-         });
-         return iteratorFor(items);
-       };
-
-       Headers$1.prototype.entries = function () {
-         var items = [];
-         this.forEach(function (value, name) {
-           items.push([name, value]);
-         });
-         return iteratorFor(items);
-       };
-
-       if (support.iterable) {
-         Headers$1.prototype[Symbol.iterator] = Headers$1.prototype.entries;
-       }
-
-       function consumed(body) {
-         if (body.bodyUsed) {
-           return Promise.reject(new TypeError('Already read'));
-         }
-
-         body.bodyUsed = true;
-       }
-
-       function fileReaderReady(reader) {
-         return new Promise(function (resolve, reject) {
-           reader.onload = function () {
-             resolve(reader.result);
-           };
-
-           reader.onerror = function () {
-             reject(reader.error);
-           };
-         });
-       }
-
-       function readBlobAsArrayBuffer(blob) {
-         var reader = new FileReader();
-         var promise = fileReaderReady(reader);
-         reader.readAsArrayBuffer(blob);
-         return promise;
-       }
-
-       function readBlobAsText(blob) {
-         var reader = new FileReader();
-         var promise = fileReaderReady(reader);
-         reader.readAsText(blob);
-         return promise;
-       }
-
-       function readArrayBufferAsText(buf) {
-         var view = new Uint8Array(buf);
-         var chars = new Array(view.length);
+       function readArrayBufferAsText(buf) {
+         var view = new Uint8Array(buf);
+         var chars = new Array(view.length);
 
          for (var i = 0; i < view.length; i++) {
            chars[i] = String.fromCharCode(view[i]);
            this.credentials = input.credentials;
 
            if (!options.headers) {
-             this.headers = new Headers$1(input.headers);
+             this.headers = new Headers(input.headers);
            }
 
            this.method = input.method;
          this.credentials = options.credentials || this.credentials || 'same-origin';
 
          if (options.headers || !this.headers) {
-           this.headers = new Headers$1(options.headers);
+           this.headers = new Headers(options.headers);
          }
 
          this.method = normalizeMethod(options.method || this.method || 'GET');
        }
 
        function parseHeaders(rawHeaders) {
-         var headers = new Headers$1(); // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
+         var headers = new Headers(); // Replace instances of \r\n and \n followed by at least one space or horizontal tab with a space
          // https://tools.ietf.org/html/rfc7230#section-3.2
 
-         var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' ');
-         preProcessedHeaders.split(/\r?\n/).forEach(function (line) {
+         var preProcessedHeaders = rawHeaders.replace(/\r?\n[\t ]+/g, ' '); // Avoiding split via regex to work around a common IE11 bug with the core-js 3.6.0 regex polyfill
+         // https://github.com/github/fetch/issues/748
+         // https://github.com/zloirock/core-js/issues/751
+
+         preProcessedHeaders.split('\r').map(function (header) {
+           return header.indexOf('\n') === 0 ? header.substr(1, header.length) : header;
+         }).forEach(function (line) {
            var parts = line.split(':');
            var key = parts.shift().trim();
 
          this.type = 'default';
          this.status = options.status === undefined ? 200 : options.status;
          this.ok = this.status >= 200 && this.status < 300;
-         this.statusText = 'statusText' in options ? options.statusText : '';
-         this.headers = new Headers$1(options.headers);
+         this.statusText = options.statusText === undefined ? '' : '' + options.statusText;
+         this.headers = new Headers(options.headers);
          this.url = options.url || '';
 
          this._initBody(bodyInit);
          return new Response(this._bodyInit, {
            status: this.status,
            statusText: this.statusText,
-           headers: new Headers$1(this.headers),
+           headers: new Headers(this.headers),
            url: this.url
          });
        };
          });
        };
 
-       var DOMException$1 = global$1.DOMException;
+       var DOMException$1 = global$k.DOMException;
 
        try {
          new DOMException$1();
 
            function fixUrl(url) {
              try {
-               return url === '' && global$1.location.href ? global$1.location.href : url;
+               return url === '' && global$k.location.href ? global$k.location.href : url;
              } catch (e) {
                return url;
              }
              }
            }
 
-           if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers$1)) {
+           if (init && _typeof(init.headers) === 'object' && !(init.headers instanceof Headers)) {
              Object.getOwnPropertyNames(init.headers).forEach(function (name) {
                xhr.setRequestHeader(name, normalizeValue(init.headers[name]));
              });
        }
        fetch$1.polyfill = true;
 
-       if (!global$1.fetch) {
-         global$1.fetch = fetch$1;
-         global$1.Headers = Headers$1;
-         global$1.Request = Request;
-         global$1.Response = Response;
+       if (!global$k.fetch) {
+         global$k.fetch = fetch$1;
+         global$k.Headers = Headers;
+         global$k.Request = Request;
+         global$k.Response = Response;
        }
 
-       // `Symbol.toStringTag` well-known symbol
-       // https://tc39.github.io/ecma262/#sec-symbol.tostringtag
-       defineWellKnownSymbol('toStringTag');
-
-       var HAS_SPECIES_SUPPORT$2 = arrayMethodHasSpeciesSupport('splice');
-       var USES_TO_LENGTH$5 = arrayMethodUsesToLength('splice', { ACCESSORS: true, 0: 0, 1: 2 });
-
-       var max$3 = Math.max;
-       var min$6 = Math.min;
-       var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
-       var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';
-
-       // `Array.prototype.splice` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.splice
-       // with adding support of @@species
-       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$2 || !USES_TO_LENGTH$5 }, {
-         splice: function splice(start, deleteCount /* , ...items */) {
-           var O = toObject(this);
-           var len = toLength(O.length);
-           var actualStart = toAbsoluteIndex(start, len);
-           var argumentsLength = arguments.length;
-           var insertCount, actualDeleteCount, A, k, from, to;
-           if (argumentsLength === 0) {
-             insertCount = actualDeleteCount = 0;
-           } else if (argumentsLength === 1) {
-             insertCount = 0;
-             actualDeleteCount = len - actualStart;
-           } else {
-             insertCount = argumentsLength - 2;
-             actualDeleteCount = min$6(max$3(toInteger(deleteCount), 0), len - actualStart);
-           }
-           if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER) {
-             throw TypeError(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);
-           }
-           A = arraySpeciesCreate(O, actualDeleteCount);
-           for (k = 0; k < actualDeleteCount; k++) {
-             from = actualStart + k;
-             if (from in O) createProperty(A, k, O[from]);
-           }
-           A.length = actualDeleteCount;
-           if (insertCount < actualDeleteCount) {
-             for (k = actualStart; k < len - actualDeleteCount; k++) {
-               from = k + actualDeleteCount;
-               to = k + insertCount;
-               if (from in O) O[to] = O[from];
-               else delete O[to];
-             }
-             for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];
-           } else if (insertCount > actualDeleteCount) {
-             for (k = len - actualDeleteCount; k > actualStart; k--) {
-               from = k + actualDeleteCount - 1;
-               to = k + insertCount - 1;
-               if (from in O) O[to] = O[from];
-               else delete O[to];
-             }
-           }
-           for (k = 0; k < insertCount; k++) {
-             O[k + actualStart] = arguments[k + 2];
-           }
-           O.length = len - actualDeleteCount + insertCount;
-           return A;
-         }
-       });
-
-       // JSON[@@toStringTag] property
-       // https://tc39.github.io/ecma262/#sec-json-@@tostringtag
-       setToStringTag(global_1.JSON, 'JSON', true);
-
-       // Math[@@toStringTag] property
-       // https://tc39.github.io/ecma262/#sec-math-@@tostringtag
-       setToStringTag(Math, 'Math', true);
+       var $$T = _export;
+       var DESCRIPTORS$9 = descriptors;
+       var objectDefinePropertyModile = objectDefineProperty;
 
        // `Object.defineProperty` method
-       // https://tc39.github.io/ecma262/#sec-object.defineproperty
-       _export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
-         defineProperty: objectDefineProperty.f
+       // https://tc39.es/ecma262/#sec-object.defineproperty
+       $$T({ target: 'Object', stat: true, forced: !DESCRIPTORS$9, sham: !DESCRIPTORS$9 }, {
+         defineProperty: objectDefinePropertyModile.f
        });
 
-       var nativeGetOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+       var $$S = _export;
+       var setPrototypeOf = objectSetPrototypeOf;
 
-
-       var FAILS_ON_PRIMITIVES$1 = fails(function () { nativeGetOwnPropertyDescriptor$2(1); });
-       var FORCED$5 = !descriptors || FAILS_ON_PRIMITIVES$1;
-
-       // `Object.getOwnPropertyDescriptor` method
-       // https://tc39.github.io/ecma262/#sec-object.getownpropertydescriptor
-       _export({ target: 'Object', stat: true, forced: FORCED$5, sham: !descriptors }, {
-         getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
-           return nativeGetOwnPropertyDescriptor$2(toIndexedObject(it), key);
-         }
+       // `Object.setPrototypeOf` method
+       // https://tc39.es/ecma262/#sec-object.setprototypeof
+       $$S({ target: 'Object', stat: true }, {
+         setPrototypeOf: setPrototypeOf
        });
 
-       var FAILS_ON_PRIMITIVES$2 = fails(function () { objectGetPrototypeOf(1); });
+       var $$R = _export;
+       var fails$n = fails$S;
+       var toObject$8 = toObject$j;
+       var nativeGetPrototypeOf = objectGetPrototypeOf;
+       var CORRECT_PROTOTYPE_GETTER = correctPrototypeGetter;
+
+       var FAILS_ON_PRIMITIVES$4 = fails$n(function () { nativeGetPrototypeOf(1); });
 
        // `Object.getPrototypeOf` method
-       // https://tc39.github.io/ecma262/#sec-object.getprototypeof
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$2, sham: !correctPrototypeGetter }, {
+       // https://tc39.es/ecma262/#sec-object.getprototypeof
+       $$R({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4, sham: !CORRECT_PROTOTYPE_GETTER }, {
          getPrototypeOf: function getPrototypeOf(it) {
-           return objectGetPrototypeOf(toObject(it));
+           return nativeGetPrototypeOf(toObject$8(it));
          }
        });
 
-       // `Object.setPrototypeOf` method
-       // https://tc39.github.io/ecma262/#sec-object.setprototypeof
-       _export({ target: 'Object', stat: true }, {
-         setPrototypeOf: objectSetPrototypeOf
-       });
+       var global$j = global$1m;
+       var uncurryThis$m = functionUncurryThis;
+       var aCallable$2 = aCallable$a;
+       var isObject$b = isObject$s;
+       var hasOwn$5 = hasOwnProperty_1;
+       var arraySlice$2 = arraySlice$c;
 
-       var slice$1 = [].slice;
+       var Function$1 = global$j.Function;
+       var concat$1 = uncurryThis$m([].concat);
+       var join$3 = uncurryThis$m([].join);
        var factories = {};
 
        var construct = function (C, argsLength, args) {
-         if (!(argsLength in factories)) {
+         if (!hasOwn$5(factories, argsLength)) {
            for (var list = [], i = 0; i < argsLength; i++) list[i] = 'a[' + i + ']';
-           // eslint-disable-next-line no-new-func
-           factories[argsLength] = Function('C,a', 'return new C(' + list.join(',') + ')');
+           factories[argsLength] = Function$1('C,a', 'return new C(' + join$3(list, ',') + ')');
          } return factories[argsLength](C, args);
        };
 
        // `Function.prototype.bind` method implementation
-       // https://tc39.github.io/ecma262/#sec-function.prototype.bind
-       var functionBind = Function.bind || function bind(that /* , ...args */) {
-         var fn = aFunction$1(this);
-         var partArgs = slice$1.call(arguments, 1);
+       // https://tc39.es/ecma262/#sec-function.prototype.bind
+       var functionBind = Function$1.bind || function bind(that /* , ...args */) {
+         var F = aCallable$2(this);
+         var Prototype = F.prototype;
+         var partArgs = arraySlice$2(arguments, 1);
          var boundFunction = function bound(/* args... */) {
-           var args = partArgs.concat(slice$1.call(arguments));
-           return this instanceof boundFunction ? construct(fn, args.length, args) : fn.apply(that, args);
+           var args = concat$1(partArgs, arraySlice$2(arguments));
+           return this instanceof boundFunction ? construct(F, args.length, args) : F.apply(that, args);
          };
-         if (isObject(fn.prototype)) boundFunction.prototype = fn.prototype;
+         if (isObject$b(Prototype)) boundFunction.prototype = Prototype;
          return boundFunction;
        };
 
-       var nativeConstruct = getBuiltIn('Reflect', 'construct');
+       var $$Q = _export;
+       var getBuiltIn$1 = getBuiltIn$b;
+       var apply = functionApply;
+       var bind$7 = functionBind;
+       var aConstructor = aConstructor$3;
+       var anObject$4 = anObject$n;
+       var isObject$a = isObject$s;
+       var create$4 = objectCreate;
+       var fails$m = fails$S;
+
+       var nativeConstruct = getBuiltIn$1('Reflect', 'construct');
+       var ObjectPrototype = Object.prototype;
+       var push$4 = [].push;
 
        // `Reflect.construct` method
-       // https://tc39.github.io/ecma262/#sec-reflect.construct
+       // https://tc39.es/ecma262/#sec-reflect.construct
        // MS Edge supports only 2 arguments and argumentsList argument is optional
        // FF Nightly sets third argument as `new.target`, but does not create `this` from it
-       var NEW_TARGET_BUG = fails(function () {
+       var NEW_TARGET_BUG = fails$m(function () {
          function F() { /* empty */ }
          return !(nativeConstruct(function () { /* empty */ }, [], F) instanceof F);
        });
-       var ARGS_BUG = !fails(function () {
+
+       var ARGS_BUG = !fails$m(function () {
          nativeConstruct(function () { /* empty */ });
        });
-       var FORCED$6 = NEW_TARGET_BUG || ARGS_BUG;
 
-       _export({ target: 'Reflect', stat: true, forced: FORCED$6, sham: FORCED$6 }, {
+       var FORCED$c = NEW_TARGET_BUG || ARGS_BUG;
+
+       $$Q({ target: 'Reflect', stat: true, forced: FORCED$c, sham: FORCED$c }, {
          construct: function construct(Target, args /* , newTarget */) {
-           aFunction$1(Target);
-           anObject(args);
-           var newTarget = arguments.length < 3 ? Target : aFunction$1(arguments[2]);
+           aConstructor(Target);
+           anObject$4(args);
+           var newTarget = arguments.length < 3 ? Target : aConstructor(arguments[2]);
            if (ARGS_BUG && !NEW_TARGET_BUG) return nativeConstruct(Target, args, newTarget);
            if (Target == newTarget) {
              // w/o altered newTarget, optimization for 0-4 arguments
              }
              // w/o altered newTarget, lot of arguments case
              var $args = [null];
-             $args.push.apply($args, args);
-             return new (functionBind.apply(Target, $args))();
+             apply(push$4, $args, args);
+             return new (apply(bind$7, Target, $args))();
            }
            // with altered newTarget, not support built-in constructors
            var proto = newTarget.prototype;
-           var instance = objectCreate(isObject(proto) ? proto : Object.prototype);
-           var result = Function.apply.call(Target, instance, args);
-           return isObject(result) ? result : instance;
+           var instance = create$4(isObject$a(proto) ? proto : ObjectPrototype);
+           var result = apply(Target, instance, args);
+           return isObject$a(result) ? result : instance;
          }
        });
 
+       var hasOwn$4 = hasOwnProperty_1;
+
+       var isDataDescriptor$1 = function (descriptor) {
+         return descriptor !== undefined && (hasOwn$4(descriptor, 'value') || hasOwn$4(descriptor, 'writable'));
+       };
+
+       var $$P = _export;
+       var call$6 = functionCall;
+       var isObject$9 = isObject$s;
+       var anObject$3 = anObject$n;
+       var isDataDescriptor = isDataDescriptor$1;
+       var getOwnPropertyDescriptorModule = objectGetOwnPropertyDescriptor;
+       var getPrototypeOf = objectGetPrototypeOf;
+
        // `Reflect.get` method
-       // https://tc39.github.io/ecma262/#sec-reflect.get
-       function get$2(target, propertyKey /* , receiver */) {
+       // https://tc39.es/ecma262/#sec-reflect.get
+       function get$3(target, propertyKey /* , receiver */) {
          var receiver = arguments.length < 3 ? target : arguments[2];
          var descriptor, prototype;
-         if (anObject(target) === receiver) return target[propertyKey];
-         if (descriptor = objectGetOwnPropertyDescriptor.f(target, propertyKey)) return has(descriptor, 'value')
+         if (anObject$3(target) === receiver) return target[propertyKey];
+         descriptor = getOwnPropertyDescriptorModule.f(target, propertyKey);
+         if (descriptor) return isDataDescriptor(descriptor)
            ? descriptor.value
-           : descriptor.get === undefined
-             ? undefined
-             : descriptor.get.call(receiver);
-         if (isObject(prototype = objectGetPrototypeOf(target))) return get$2(prototype, propertyKey, receiver);
+           : descriptor.get === undefined ? undefined : call$6(descriptor.get, receiver);
+         if (isObject$9(prototype = getPrototypeOf(target))) return get$3(prototype, propertyKey, receiver);
        }
 
-       _export({ target: 'Reflect', stat: true }, {
-         get: get$2
+       $$P({ target: 'Reflect', stat: true }, {
+         get: get$3
        });
 
-       (function (factory) {
-          factory();
-       })(function () {
+       var $$O = _export;
+       var fails$l = fails$S;
+       var toIndexedObject$1 = toIndexedObject$c;
+       var nativeGetOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+       var DESCRIPTORS$8 = descriptors;
 
-         function _classCallCheck(instance, Constructor) {
-           if (!(instance instanceof Constructor)) {
-             throw new TypeError("Cannot call a class as a function");
-           }
-         }
+       var FAILS_ON_PRIMITIVES$3 = fails$l(function () { nativeGetOwnPropertyDescriptor(1); });
+       var FORCED$b = !DESCRIPTORS$8 || FAILS_ON_PRIMITIVES$3;
 
-         function _defineProperties(target, props) {
-           for (var i = 0; i < props.length; i++) {
-             var descriptor = props[i];
-             descriptor.enumerable = descriptor.enumerable || false;
-             descriptor.configurable = true;
-             if ("value" in descriptor) descriptor.writable = true;
-             Object.defineProperty(target, descriptor.key, descriptor);
-           }
+       // `Object.getOwnPropertyDescriptor` method
+       // https://tc39.es/ecma262/#sec-object.getownpropertydescriptor
+       $$O({ target: 'Object', stat: true, forced: FORCED$b, sham: !DESCRIPTORS$8 }, {
+         getOwnPropertyDescriptor: function getOwnPropertyDescriptor(it, key) {
+           return nativeGetOwnPropertyDescriptor(toIndexedObject$1(it), key);
          }
+       });
 
-         function _createClass(Constructor, protoProps, staticProps) {
-           if (protoProps) _defineProperties(Constructor.prototype, protoProps);
-           if (staticProps) _defineProperties(Constructor, staticProps);
-           return Constructor;
-         }
+       var $$N = _export;
+       var global$i = global$1m;
+       var toAbsoluteIndex$1 = toAbsoluteIndex$8;
+       var toIntegerOrInfinity$2 = toIntegerOrInfinity$b;
+       var lengthOfArrayLike$5 = lengthOfArrayLike$g;
+       var toObject$7 = toObject$j;
+       var arraySpeciesCreate$2 = arraySpeciesCreate$4;
+       var createProperty$2 = createProperty$4;
+       var arrayMethodHasSpeciesSupport$2 = arrayMethodHasSpeciesSupport$5;
 
-         function _inherits(subClass, superClass) {
-           if (typeof superClass !== "function" && superClass !== null) {
-             throw new TypeError("Super expression must either be null or a function");
-           }
+       var HAS_SPECIES_SUPPORT$1 = arrayMethodHasSpeciesSupport$2('splice');
 
-           subClass.prototype = Object.create(superClass && superClass.prototype, {
-             constructor: {
-               value: subClass,
-               writable: true,
+       var TypeError$6 = global$i.TypeError;
+       var max$1 = Math.max;
+       var min$3 = Math.min;
+       var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
+       var MAXIMUM_ALLOWED_LENGTH_EXCEEDED = 'Maximum allowed length exceeded';
+
+       // `Array.prototype.splice` method
+       // https://tc39.es/ecma262/#sec-array.prototype.splice
+       // with adding support of @@species
+       $$N({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$1 }, {
+         splice: function splice(start, deleteCount /* , ...items */) {
+           var O = toObject$7(this);
+           var len = lengthOfArrayLike$5(O);
+           var actualStart = toAbsoluteIndex$1(start, len);
+           var argumentsLength = arguments.length;
+           var insertCount, actualDeleteCount, A, k, from, to;
+           if (argumentsLength === 0) {
+             insertCount = actualDeleteCount = 0;
+           } else if (argumentsLength === 1) {
+             insertCount = 0;
+             actualDeleteCount = len - actualStart;
+           } else {
+             insertCount = argumentsLength - 2;
+             actualDeleteCount = min$3(max$1(toIntegerOrInfinity$2(deleteCount), 0), len - actualStart);
+           }
+           if (len + insertCount - actualDeleteCount > MAX_SAFE_INTEGER$1) {
+             throw TypeError$6(MAXIMUM_ALLOWED_LENGTH_EXCEEDED);
+           }
+           A = arraySpeciesCreate$2(O, actualDeleteCount);
+           for (k = 0; k < actualDeleteCount; k++) {
+             from = actualStart + k;
+             if (from in O) createProperty$2(A, k, O[from]);
+           }
+           A.length = actualDeleteCount;
+           if (insertCount < actualDeleteCount) {
+             for (k = actualStart; k < len - actualDeleteCount; k++) {
+               from = k + actualDeleteCount;
+               to = k + insertCount;
+               if (from in O) O[to] = O[from];
+               else delete O[to];
+             }
+             for (k = len; k > len - actualDeleteCount + insertCount; k--) delete O[k - 1];
+           } else if (insertCount > actualDeleteCount) {
+             for (k = len - actualDeleteCount; k > actualStart; k--) {
+               from = k + actualDeleteCount - 1;
+               to = k + insertCount - 1;
+               if (from in O) O[to] = O[from];
+               else delete O[to];
+             }
+           }
+           for (k = 0; k < insertCount; k++) {
+             O[k + actualStart] = arguments[k + 2];
+           }
+           O.length = len - actualDeleteCount + insertCount;
+           return A;
+         }
+       });
+
+       var defineWellKnownSymbol$1 = defineWellKnownSymbol$4;
+
+       // `Symbol.toStringTag` well-known symbol
+       // https://tc39.es/ecma262/#sec-symbol.tostringtag
+       defineWellKnownSymbol$1('toStringTag');
+
+       var global$h = global$1m;
+       var setToStringTag$3 = setToStringTag$a;
+
+       // JSON[@@toStringTag] property
+       // https://tc39.es/ecma262/#sec-json-@@tostringtag
+       setToStringTag$3(global$h.JSON, 'JSON', true);
+
+       var setToStringTag$2 = setToStringTag$a;
+
+       // Math[@@toStringTag] property
+       // https://tc39.es/ecma262/#sec-math-@@tostringtag
+       setToStringTag$2(Math, 'Math', true);
+
+       (function (factory) {
+         factory();
+       })(function () {
+
+         function _classCallCheck(instance, Constructor) {
+           if (!(instance instanceof Constructor)) {
+             throw new TypeError("Cannot call a class as a function");
+           }
+         }
+
+         function _defineProperties(target, props) {
+           for (var i = 0; i < props.length; i++) {
+             var descriptor = props[i];
+             descriptor.enumerable = descriptor.enumerable || false;
+             descriptor.configurable = true;
+             if ("value" in descriptor) descriptor.writable = true;
+             Object.defineProperty(target, descriptor.key, descriptor);
+           }
+         }
+
+         function _createClass(Constructor, protoProps, staticProps) {
+           if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+           if (staticProps) _defineProperties(Constructor, staticProps);
+           return Constructor;
+         }
+
+         function _inherits(subClass, superClass) {
+           if (typeof superClass !== "function" && superClass !== null) {
+             throw new TypeError("Super expression must either be null or a function");
+           }
+
+           subClass.prototype = Object.create(superClass && superClass.prototype, {
+             constructor: {
+               value: subClass,
+               writable: true,
                configurable: true
              }
            });
            if (typeof Proxy === "function") return true;
 
            try {
-             Date.prototype.toString.call(Reflect.construct(Date, [], function () {}));
+             Boolean.prototype.valueOf.call(Reflect.construct(Boolean, [], function () {}));
              return true;
            } catch (e) {
              return false;
 
            _createClass(Emitter, [{
              key: "addEventListener",
-             value: function addEventListener(type, callback) {
+             value: function addEventListener(type, callback, options) {
                if (!(type in this.listeners)) {
                  this.listeners[type] = [];
                }
 
-               this.listeners[type].push(callback);
+               this.listeners[type].push({
+                 callback: callback,
+                 options: options
+               });
              }
            }, {
              key: "removeEventListener",
                var stack = this.listeners[type];
 
                for (var i = 0, l = stack.length; i < l; i++) {
-                 if (stack[i] === callback) {
+                 if (stack[i].callback === callback) {
                    stack.splice(i, 1);
                    return;
                  }
            }, {
              key: "dispatchEvent",
              value: function dispatchEvent(event) {
-               var _this = this;
-
                if (!(event.type in this.listeners)) {
                  return;
                }
 
-               var debounce = function debounce(callback) {
-                 setTimeout(function () {
-                   return callback.call(_this, event);
-                 });
-               };
-
                var stack = this.listeners[event.type];
+               var stackToCall = stack.slice();
 
-               for (var i = 0, l = stack.length; i < l; i++) {
-                 debounce(stack[i]);
+               for (var i = 0, l = stackToCall.length; i < l; i++) {
+                 var listener = stackToCall[i];
+
+                 try {
+                   listener.callback.call(this, event);
+                 } catch (e) {
+                   Promise.resolve().then(function () {
+                     throw e;
+                   });
+                 }
+
+                 if (listener.options && listener.options.once) {
+                   this.removeEventListener(event.type, listener.callback);
+                 }
                }
 
                return !event.defaultPrevented;
            var _super = _createSuper(AbortSignal);
 
            function AbortSignal() {
-             var _this2;
+             var _this;
 
              _classCallCheck(this, AbortSignal);
 
-             _this2 = _super.call(this); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
+             _this = _super.call(this); // Some versions of babel does not transpile super() correctly for IE <= 10, if the parent
              // constructor has failed to run, then "this.listeners" will still be undefined and then we call
              // the parent constructor directly instead as a workaround. For general details, see babel bug:
              // https://github.com/babel/babel/issues/3041
              // This hack was added as a fix for the issue described here:
              // https://github.com/Financial-Times/polyfill-library/pull/59#issuecomment-477558042
 
-             if (!_this2.listeners) {
-               Emitter.call(_assertThisInitialized(_this2));
+             if (!_this.listeners) {
+               Emitter.call(_assertThisInitialized(_this));
              } // Compared to assignment, Object.defineProperty makes properties non-enumerable by default and
              // we want Object.keys(new AbortController().signal) to be [] for compat with the native impl
 
 
-             Object.defineProperty(_assertThisInitialized(_this2), 'aborted', {
+             Object.defineProperty(_assertThisInitialized(_this), 'aborted', {
                value: false,
                writable: true,
                configurable: true
              });
-             Object.defineProperty(_assertThisInitialized(_this2), 'onabort', {
+             Object.defineProperty(_assertThisInitialized(_this), 'onabort', {
                value: null,
                writable: true,
                configurable: true
              });
-             return _this2;
+             return _this;
            }
 
            _createClass(AbortSignal, [{
          };
        }
 
-       var IS_CONCAT_SPREADABLE = wellKnownSymbol('isConcatSpreadable');
-       var MAX_SAFE_INTEGER$1 = 0x1FFFFFFFFFFFFF;
+       var $$M = _export;
+       var global$g = global$1m;
+       var fails$k = fails$S;
+       var isArray$3 = isArray$8;
+       var isObject$8 = isObject$s;
+       var toObject$6 = toObject$j;
+       var lengthOfArrayLike$4 = lengthOfArrayLike$g;
+       var createProperty$1 = createProperty$4;
+       var arraySpeciesCreate$1 = arraySpeciesCreate$4;
+       var arrayMethodHasSpeciesSupport$1 = arrayMethodHasSpeciesSupport$5;
+       var wellKnownSymbol$2 = wellKnownSymbol$t;
+       var V8_VERSION = engineV8Version;
+
+       var IS_CONCAT_SPREADABLE = wellKnownSymbol$2('isConcatSpreadable');
+       var MAX_SAFE_INTEGER = 0x1FFFFFFFFFFFFF;
        var MAXIMUM_ALLOWED_INDEX_EXCEEDED = 'Maximum allowed index exceeded';
+       var TypeError$5 = global$g.TypeError;
 
        // We can't use this feature detection in V8 since it causes
        // deoptimization and serious performance degradation
        // https://github.com/zloirock/core-js/issues/679
-       var IS_CONCAT_SPREADABLE_SUPPORT = engineV8Version >= 51 || !fails(function () {
+       var IS_CONCAT_SPREADABLE_SUPPORT = V8_VERSION >= 51 || !fails$k(function () {
          var array = [];
          array[IS_CONCAT_SPREADABLE] = false;
          return array.concat()[0] !== array;
        });
 
-       var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('concat');
+       var SPECIES_SUPPORT = arrayMethodHasSpeciesSupport$1('concat');
 
        var isConcatSpreadable = function (O) {
-         if (!isObject(O)) return false;
+         if (!isObject$8(O)) return false;
          var spreadable = O[IS_CONCAT_SPREADABLE];
-         return spreadable !== undefined ? !!spreadable : isArray(O);
+         return spreadable !== undefined ? !!spreadable : isArray$3(O);
        };
 
-       var FORCED$7 = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;
+       var FORCED$a = !IS_CONCAT_SPREADABLE_SUPPORT || !SPECIES_SUPPORT;
 
        // `Array.prototype.concat` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.concat
+       // https://tc39.es/ecma262/#sec-array.prototype.concat
        // with adding support of @@isConcatSpreadable and @@species
-       _export({ target: 'Array', proto: true, forced: FORCED$7 }, {
-         concat: function concat(arg) { // eslint-disable-line no-unused-vars
-           var O = toObject(this);
-           var A = arraySpeciesCreate(O, 0);
+       $$M({ target: 'Array', proto: true, forced: FORCED$a }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         concat: function concat(arg) {
+           var O = toObject$6(this);
+           var A = arraySpeciesCreate$1(O, 0);
            var n = 0;
            var i, k, length, len, E;
            for (i = -1, length = arguments.length; i < length; i++) {
              E = i === -1 ? O : arguments[i];
              if (isConcatSpreadable(E)) {
-               len = toLength(E.length);
-               if (n + len > MAX_SAFE_INTEGER$1) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
-               for (k = 0; k < len; k++, n++) if (k in E) createProperty(A, n, E[k]);
+               len = lengthOfArrayLike$4(E);
+               if (n + len > MAX_SAFE_INTEGER) throw TypeError$5(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+               for (k = 0; k < len; k++, n++) if (k in E) createProperty$1(A, n, E[k]);
              } else {
-               if (n >= MAX_SAFE_INTEGER$1) throw TypeError(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
-               createProperty(A, n++, E);
+               if (n >= MAX_SAFE_INTEGER) throw TypeError$5(MAXIMUM_ALLOWED_INDEX_EXCEEDED);
+               createProperty$1(A, n++, E);
              }
            }
            A.length = n;
          }
        });
 
+       var DESCRIPTORS$7 = descriptors;
+       var uncurryThis$l = functionUncurryThis;
+       var call$5 = functionCall;
+       var fails$j = fails$S;
+       var objectKeys$1 = objectKeys$4;
+       var getOwnPropertySymbolsModule = objectGetOwnPropertySymbols;
+       var propertyIsEnumerableModule = objectPropertyIsEnumerable;
+       var toObject$5 = toObject$j;
+       var IndexedObject = indexedObject;
+
+       // eslint-disable-next-line es/no-object-assign -- safe
+       var $assign = Object.assign;
+       // eslint-disable-next-line es/no-object-defineproperty -- required for testing
+       var defineProperty$4 = Object.defineProperty;
+       var concat = uncurryThis$l([].concat);
+
        // `Object.assign` method
-       // https://tc39.github.io/ecma262/#sec-object.assign
-       _export({ target: 'Object', stat: true, forced: Object.assign !== objectAssign }, {
-         assign: objectAssign
-       });
+       // https://tc39.es/ecma262/#sec-object.assign
+       var objectAssign = !$assign || fails$j(function () {
+         // should have correct order of operations (Edge bug)
+         if (DESCRIPTORS$7 && $assign({ b: 1 }, $assign(defineProperty$4({}, 'a', {
+           enumerable: true,
+           get: function () {
+             defineProperty$4(this, 'b', {
+               value: 3,
+               enumerable: false
+             });
+           }
+         }), { b: 2 })).b !== 1) return true;
+         // should work with symbols and should have deterministic property order (V8 bug)
+         var A = {};
+         var B = {};
+         // eslint-disable-next-line es/no-symbol -- safe
+         var symbol = Symbol();
+         var alphabet = 'abcdefghijklmnopqrst';
+         A[symbol] = 7;
+         alphabet.split('').forEach(function (chr) { B[chr] = chr; });
+         return $assign({}, A)[symbol] != 7 || objectKeys$1($assign({}, B)).join('') != alphabet;
+       }) ? function assign(target, source) { // eslint-disable-line no-unused-vars -- required for `.length`
+         var T = toObject$5(target);
+         var argumentsLength = arguments.length;
+         var index = 1;
+         var getOwnPropertySymbols = getOwnPropertySymbolsModule.f;
+         var propertyIsEnumerable = propertyIsEnumerableModule.f;
+         while (argumentsLength > index) {
+           var S = IndexedObject(arguments[index++]);
+           var keys = getOwnPropertySymbols ? concat(objectKeys$1(S), getOwnPropertySymbols(S)) : objectKeys$1(S);
+           var length = keys.length;
+           var j = 0;
+           var key;
+           while (length > j) {
+             key = keys[j++];
+             if (!DESCRIPTORS$7 || call$5(propertyIsEnumerable, S, key)) T[key] = S[key];
+           }
+         } return T;
+       } : $assign;
 
-       var $filter$1 = arrayIteration.filter;
+       var $$L = _export;
+       var assign$2 = objectAssign;
 
+       // `Object.assign` method
+       // https://tc39.es/ecma262/#sec-object.assign
+       // eslint-disable-next-line es/no-object-assign -- required for testing
+       $$L({ target: 'Object', stat: true, forced: Object.assign !== assign$2 }, {
+         assign: assign$2
+       });
 
+       var $$K = _export;
+       var $filter = arrayIteration.filter;
+       var arrayMethodHasSpeciesSupport = arrayMethodHasSpeciesSupport$5;
 
-       var HAS_SPECIES_SUPPORT$3 = arrayMethodHasSpeciesSupport('filter');
-       // Edge 14- issue
-       var USES_TO_LENGTH$6 = arrayMethodUsesToLength('filter');
+       var HAS_SPECIES_SUPPORT = arrayMethodHasSpeciesSupport('filter');
 
        // `Array.prototype.filter` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.filter
+       // https://tc39.es/ecma262/#sec-array.prototype.filter
        // with adding support of @@species
-       _export({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT$3 || !USES_TO_LENGTH$6 }, {
+       $$K({ target: 'Array', proto: true, forced: !HAS_SPECIES_SUPPORT }, {
          filter: function filter(callbackfn /* , thisArg */) {
-           return $filter$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return $filter(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
-       var nativeReverse = [].reverse;
-       var test$1 = [1, 2];
+       var $$J = _export;
+       var toObject$4 = toObject$j;
+       var nativeKeys = objectKeys$4;
+       var fails$i = fails$S;
 
-       // `Array.prototype.reverse` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.reverse
-       // fix for Safari 12.0 bug
-       // https://bugs.webkit.org/show_bug.cgi?id=188794
-       _export({ target: 'Array', proto: true, forced: String(test$1) === String(test$1.reverse()) }, {
-         reverse: function reverse() {
-           // eslint-disable-next-line no-self-assign
-           if (isArray(this)) this.length = this.length;
-           return nativeReverse.call(this);
-         }
-       });
-
-       var FAILS_ON_PRIMITIVES$3 = fails(function () { objectKeys(1); });
+       var FAILS_ON_PRIMITIVES$2 = fails$i(function () { nativeKeys(1); });
 
        // `Object.keys` method
-       // https://tc39.github.io/ecma262/#sec-object.keys
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$3 }, {
+       // https://tc39.es/ecma262/#sec-object.keys
+       $$J({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$2 }, {
          keys: function keys(it) {
-           return objectKeys(toObject(it));
+           return nativeKeys(toObject$4(it));
          }
        });
 
-       var trim = stringTrim.trim;
+       var $$I = _export;
+       var uncurryThis$k = functionUncurryThis;
+       var isArray$2 = isArray$8;
+
+       var un$Reverse = uncurryThis$k([].reverse);
+       var test$1 = [1, 2];
 
+       // `Array.prototype.reverse` method
+       // https://tc39.es/ecma262/#sec-array.prototype.reverse
+       // fix for Safari 12.0 bug
+       // https://bugs.webkit.org/show_bug.cgi?id=188794
+       $$I({ target: 'Array', proto: true, forced: String(test$1) === String(test$1.reverse()) }, {
+         reverse: function reverse() {
+           // eslint-disable-next-line no-self-assign -- dirty hack
+           if (isArray$2(this)) this.length = this.length;
+           return un$Reverse(this);
+         }
+       });
 
-       var $parseFloat = global_1.parseFloat;
-       var FORCED$8 = 1 / $parseFloat(whitespaces + '-0') !== -Infinity;
+       var global$f = global$1m;
+       var fails$h = fails$S;
+       var uncurryThis$j = functionUncurryThis;
+       var toString$c = toString$k;
+       var trim$4 = stringTrim.trim;
+       var whitespaces$1 = whitespaces$4;
+
+       var charAt$2 = uncurryThis$j(''.charAt);
+       var n$ParseFloat = global$f.parseFloat;
+       var Symbol$2 = global$f.Symbol;
+       var ITERATOR$1 = Symbol$2 && Symbol$2.iterator;
+       var FORCED$9 = 1 / n$ParseFloat(whitespaces$1 + '-0') !== -Infinity
+         // MS Edge 18- broken with boxed symbols
+         || (ITERATOR$1 && !fails$h(function () { n$ParseFloat(Object(ITERATOR$1)); }));
 
        // `parseFloat` method
-       // https://tc39.github.io/ecma262/#sec-parsefloat-string
-       var numberParseFloat = FORCED$8 ? function parseFloat(string) {
-         var trimmedString = trim(String(string));
-         var result = $parseFloat(trimmedString);
-         return result === 0 && trimmedString.charAt(0) == '-' ? -0 : result;
-       } : $parseFloat;
+       // https://tc39.es/ecma262/#sec-parsefloat-string
+       var numberParseFloat = FORCED$9 ? function parseFloat(string) {
+         var trimmedString = trim$4(toString$c(string));
+         var result = n$ParseFloat(trimmedString);
+         return result === 0 && charAt$2(trimmedString, 0) == '-' ? -0 : result;
+       } : n$ParseFloat;
+
+       var $$H = _export;
+       var $parseFloat = numberParseFloat;
 
        // `parseFloat` method
-       // https://tc39.github.io/ecma262/#sec-parsefloat-string
-       _export({ global: true, forced: parseFloat != numberParseFloat }, {
-         parseFloat: numberParseFloat
+       // https://tc39.es/ecma262/#sec-parsefloat-string
+       $$H({ global: true, forced: parseFloat != $parseFloat }, {
+         parseFloat: $parseFloat
        });
 
        /*
            'sled': true,
            'yes': true
          },
+         'seamark:type': {
+           'separation_lane': true,
+           'separation_roundabout': true
+         },
          'waterway': {
            'canal': true,
            'ditch': true,
          tidal_channel: true
        };
 
-       var trim$1 = stringTrim.trim;
-
-
-       var $parseInt = global_1.parseInt;
-       var hex$1 = /^[+-]?0[Xx]/;
-       var FORCED$9 = $parseInt(whitespaces + '08') !== 8 || $parseInt(whitespaces + '0x16') !== 22;
+       var global$e = global$1m;
+       var fails$g = fails$S;
+       var uncurryThis$i = functionUncurryThis;
+       var toString$b = toString$k;
+       var trim$3 = stringTrim.trim;
+       var whitespaces = whitespaces$4;
+
+       var $parseInt$1 = global$e.parseInt;
+       var Symbol$1 = global$e.Symbol;
+       var ITERATOR = Symbol$1 && Symbol$1.iterator;
+       var hex$2 = /^[+-]?0x/i;
+       var exec$3 = uncurryThis$i(hex$2.exec);
+       var FORCED$8 = $parseInt$1(whitespaces + '08') !== 8 || $parseInt$1(whitespaces + '0x16') !== 22
+         // MS Edge 18- broken with boxed symbols
+         || (ITERATOR && !fails$g(function () { $parseInt$1(Object(ITERATOR)); }));
 
        // `parseInt` method
-       // https://tc39.github.io/ecma262/#sec-parseint-string-radix
-       var numberParseInt = FORCED$9 ? function parseInt(string, radix) {
-         var S = trim$1(String(string));
-         return $parseInt(S, (radix >>> 0) || (hex$1.test(S) ? 16 : 10));
-       } : $parseInt;
+       // https://tc39.es/ecma262/#sec-parseint-string-radix
+       var numberParseInt = FORCED$8 ? function parseInt(string, radix) {
+         var S = trim$3(toString$b(string));
+         return $parseInt$1(S, (radix >>> 0) || (exec$3(hex$2, S) ? 16 : 10));
+       } : $parseInt$1;
+
+       var $$G = _export;
+       var $parseInt = numberParseInt;
 
        // `parseInt` method
-       // https://tc39.github.io/ecma262/#sec-parseint-string-radix
-       _export({ global: true, forced: parseInt != numberParseInt }, {
-         parseInt: numberParseInt
+       // https://tc39.es/ecma262/#sec-parseint-string-radix
+       $$G({ global: true, forced: parseInt != $parseInt }, {
+         parseInt: $parseInt
        });
 
-       var freezing = !fails(function () {
-         return Object.isExtensible(Object.preventExtensions({}));
+       var internalMetadata = {exports: {}};
+
+       // FF26- bug: ArrayBuffers are non-extensible, but Object.isExtensible does not report it
+       var fails$f = fails$S;
+
+       var arrayBufferNonExtensible = fails$f(function () {
+         if (typeof ArrayBuffer == 'function') {
+           var buffer = new ArrayBuffer(8);
+           // eslint-disable-next-line es/no-object-isextensible, es/no-object-defineproperty -- safe
+           if (Object.isExtensible(buffer)) Object.defineProperty(buffer, 'a', { value: 8 });
+         }
        });
 
-       var internalMetadata = createCommonjsModule(function (module) {
-       var defineProperty = objectDefineProperty.f;
+       var fails$e = fails$S;
+       var isObject$7 = isObject$s;
+       var classof = classofRaw$1;
+       var ARRAY_BUFFER_NON_EXTENSIBLE = arrayBufferNonExtensible;
 
+       // eslint-disable-next-line es/no-object-isextensible -- safe
+       var $isExtensible = Object.isExtensible;
+       var FAILS_ON_PRIMITIVES$1 = fails$e(function () { $isExtensible(1); });
 
+       // `Object.isExtensible` method
+       // https://tc39.es/ecma262/#sec-object.isextensible
+       var objectIsExtensible = (FAILS_ON_PRIMITIVES$1 || ARRAY_BUFFER_NON_EXTENSIBLE) ? function isExtensible(it) {
+         if (!isObject$7(it)) return false;
+         if (ARRAY_BUFFER_NON_EXTENSIBLE && classof(it) == 'ArrayBuffer') return false;
+         return $isExtensible ? $isExtensible(it) : true;
+       } : $isExtensible;
 
-       var METADATA = uid('meta');
-       var id = 0;
+       var fails$d = fails$S;
 
-       var isExtensible = Object.isExtensible || function () {
-         return true;
-       };
+       var freezing = !fails$d(function () {
+         // eslint-disable-next-line es/no-object-isextensible, es/no-object-preventextensions -- required for testing
+         return Object.isExtensible(Object.preventExtensions({}));
+       });
+
+       var $$F = _export;
+       var uncurryThis$h = functionUncurryThis;
+       var hiddenKeys = hiddenKeys$6;
+       var isObject$6 = isObject$s;
+       var hasOwn$3 = hasOwnProperty_1;
+       var defineProperty$3 = objectDefineProperty.f;
+       var getOwnPropertyNamesModule = objectGetOwnPropertyNames;
+       var getOwnPropertyNamesExternalModule = objectGetOwnPropertyNamesExternal;
+       var isExtensible = objectIsExtensible;
+       var uid = uid$5;
+       var FREEZING$1 = freezing;
+
+       var REQUIRED = false;
+       var METADATA = uid('meta');
+       var id$1 = 0;
 
        var setMetadata = function (it) {
-         defineProperty(it, METADATA, { value: {
-           objectID: 'O' + ++id, // object ID
+         defineProperty$3(it, METADATA, { value: {
+           objectID: 'O' + id$1++, // object ID
            weakData: {}          // weak collections IDs
          } });
        };
 
-       var fastKey = function (it, create) {
+       var fastKey$1 = function (it, create) {
          // return a primitive with prefix
-         if (!isObject(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
-         if (!has(it, METADATA)) {
+         if (!isObject$6(it)) return typeof it == 'symbol' ? it : (typeof it == 'string' ? 'S' : 'P') + it;
+         if (!hasOwn$3(it, METADATA)) {
            // can't set metadata to uncaught frozen object
            if (!isExtensible(it)) return 'F';
            // not necessary to add metadata
        };
 
        var getWeakData = function (it, create) {
-         if (!has(it, METADATA)) {
+         if (!hasOwn$3(it, METADATA)) {
            // can't set metadata to uncaught frozen object
            if (!isExtensible(it)) return true;
            // not necessary to add metadata
        };
 
        // add metadata on freeze-family methods calling
-       var onFreeze = function (it) {
-         if (freezing && meta.REQUIRED && isExtensible(it) && !has(it, METADATA)) setMetadata(it);
+       var onFreeze$1 = function (it) {
+         if (FREEZING$1 && REQUIRED && isExtensible(it) && !hasOwn$3(it, METADATA)) setMetadata(it);
          return it;
        };
 
-       var meta = module.exports = {
-         REQUIRED: false,
-         fastKey: fastKey,
+       var enable = function () {
+         meta.enable = function () { /* empty */ };
+         REQUIRED = true;
+         var getOwnPropertyNames = getOwnPropertyNamesModule.f;
+         var splice = uncurryThis$h([].splice);
+         var test = {};
+         test[METADATA] = 1;
+
+         // prevent exposing of metadata key
+         if (getOwnPropertyNames(test).length) {
+           getOwnPropertyNamesModule.f = function (it) {
+             var result = getOwnPropertyNames(it);
+             for (var i = 0, length = result.length; i < length; i++) {
+               if (result[i] === METADATA) {
+                 splice(result, i, 1);
+                 break;
+               }
+             } return result;
+           };
+
+           $$F({ target: 'Object', stat: true, forced: true }, {
+             getOwnPropertyNames: getOwnPropertyNamesExternalModule.f
+           });
+         }
+       };
+
+       var meta = internalMetadata.exports = {
+         enable: enable,
+         fastKey: fastKey$1,
          getWeakData: getWeakData,
-         onFreeze: onFreeze
+         onFreeze: onFreeze$1
        };
 
        hiddenKeys[METADATA] = true;
-       });
 
-       var collection = function (CONSTRUCTOR_NAME, wrapper, common) {
+       var $$E = _export;
+       var global$d = global$1m;
+       var uncurryThis$g = functionUncurryThis;
+       var isForced$2 = isForced_1;
+       var redefine$4 = redefine$h.exports;
+       var InternalMetadataModule = internalMetadata.exports;
+       var iterate$1 = iterate$3;
+       var anInstance$2 = anInstance$7;
+       var isCallable$1 = isCallable$r;
+       var isObject$5 = isObject$s;
+       var fails$c = fails$S;
+       var checkCorrectnessOfIteration$1 = checkCorrectnessOfIteration$4;
+       var setToStringTag$1 = setToStringTag$a;
+       var inheritIfRequired$2 = inheritIfRequired$4;
+
+       var collection$2 = function (CONSTRUCTOR_NAME, wrapper, common) {
          var IS_MAP = CONSTRUCTOR_NAME.indexOf('Map') !== -1;
          var IS_WEAK = CONSTRUCTOR_NAME.indexOf('Weak') !== -1;
          var ADDER = IS_MAP ? 'set' : 'add';
-         var NativeConstructor = global_1[CONSTRUCTOR_NAME];
+         var NativeConstructor = global$d[CONSTRUCTOR_NAME];
          var NativePrototype = NativeConstructor && NativeConstructor.prototype;
          var Constructor = NativeConstructor;
          var exported = {};
 
          var fixMethod = function (KEY) {
-           var nativeMethod = NativePrototype[KEY];
-           redefine(NativePrototype, KEY,
+           var uncurriedNativeMethod = uncurryThis$g(NativePrototype[KEY]);
+           redefine$4(NativePrototype, KEY,
              KEY == 'add' ? function add(value) {
-               nativeMethod.call(this, value === 0 ? 0 : value);
+               uncurriedNativeMethod(this, value === 0 ? 0 : value);
                return this;
              } : KEY == 'delete' ? function (key) {
-               return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
+               return IS_WEAK && !isObject$5(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key);
              } : KEY == 'get' ? function get(key) {
-               return IS_WEAK && !isObject(key) ? undefined : nativeMethod.call(this, key === 0 ? 0 : key);
+               return IS_WEAK && !isObject$5(key) ? undefined : uncurriedNativeMethod(this, key === 0 ? 0 : key);
              } : KEY == 'has' ? function has(key) {
-               return IS_WEAK && !isObject(key) ? false : nativeMethod.call(this, key === 0 ? 0 : key);
+               return IS_WEAK && !isObject$5(key) ? false : uncurriedNativeMethod(this, key === 0 ? 0 : key);
              } : function set(key, value) {
-               nativeMethod.call(this, key === 0 ? 0 : key, value);
+               uncurriedNativeMethod(this, key === 0 ? 0 : key, value);
                return this;
              }
            );
          };
 
-         // eslint-disable-next-line max-len
-         if (isForced_1(CONSTRUCTOR_NAME, typeof NativeConstructor != 'function' || !(IS_WEAK || NativePrototype.forEach && !fails(function () {
-           new NativeConstructor().entries().next();
-         })))) {
+         var REPLACE = isForced$2(
+           CONSTRUCTOR_NAME,
+           !isCallable$1(NativeConstructor) || !(IS_WEAK || NativePrototype.forEach && !fails$c(function () {
+             new NativeConstructor().entries().next();
+           }))
+         );
+
+         if (REPLACE) {
            // create collection constructor
            Constructor = common.getConstructor(wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER);
-           internalMetadata.REQUIRED = true;
-         } else if (isForced_1(CONSTRUCTOR_NAME, true)) {
+           InternalMetadataModule.enable();
+         } else if (isForced$2(CONSTRUCTOR_NAME, true)) {
            var instance = new Constructor();
            // early implementations not supports chaining
            var HASNT_CHAINING = instance[ADDER](IS_WEAK ? {} : -0, 1) != instance;
            // V8 ~ Chromium 40- weak-collections throws on primitives, but should return false
-           var THROWS_ON_PRIMITIVES = fails(function () { instance.has(1); });
+           var THROWS_ON_PRIMITIVES = fails$c(function () { instance.has(1); });
            // most early implementations doesn't supports iterables, most modern - not close it correctly
-           // eslint-disable-next-line no-new
-           var ACCEPT_ITERABLES = checkCorrectnessOfIteration(function (iterable) { new NativeConstructor(iterable); });
+           // eslint-disable-next-line no-new -- required for testing
+           var ACCEPT_ITERABLES = checkCorrectnessOfIteration$1(function (iterable) { new NativeConstructor(iterable); });
            // for early implementations -0 and +0 not the same
-           var BUGGY_ZERO = !IS_WEAK && fails(function () {
+           var BUGGY_ZERO = !IS_WEAK && fails$c(function () {
              // V8 ~ Chromium 42- fails only with 5+ elements
              var $instance = new NativeConstructor();
              var index = 5;
 
            if (!ACCEPT_ITERABLES) {
              Constructor = wrapper(function (dummy, iterable) {
-               anInstance(dummy, Constructor, CONSTRUCTOR_NAME);
-               var that = inheritIfRequired(new NativeConstructor(), dummy, Constructor);
-               if (iterable != undefined) iterate_1(iterable, that[ADDER], that, IS_MAP);
+               anInstance$2(dummy, NativePrototype);
+               var that = inheritIfRequired$2(new NativeConstructor(), dummy, Constructor);
+               if (iterable != undefined) iterate$1(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
                return that;
              });
              Constructor.prototype = NativePrototype;
          }
 
          exported[CONSTRUCTOR_NAME] = Constructor;
-         _export({ global: true, forced: Constructor != NativeConstructor }, exported);
+         $$E({ global: true, forced: Constructor != NativeConstructor }, exported);
 
-         setToStringTag(Constructor, CONSTRUCTOR_NAME);
+         setToStringTag$1(Constructor, CONSTRUCTOR_NAME);
 
          if (!IS_WEAK) common.setStrong(Constructor, CONSTRUCTOR_NAME, IS_MAP);
 
          return Constructor;
        };
 
-       var defineProperty$8 = objectDefineProperty.f;
-
-
-
-
-
-
-
-
-       var fastKey = internalMetadata.fastKey;
-
-
-       var setInternalState$7 = internalState.set;
-       var internalStateGetterFor = internalState.getterFor;
-
-       var collectionStrong = {
+       var defineProperty$2 = objectDefineProperty.f;
+       var create$3 = objectCreate;
+       var redefineAll = redefineAll$4;
+       var bind$6 = functionBindContext;
+       var anInstance$1 = anInstance$7;
+       var iterate = iterate$3;
+       var defineIterator = defineIterator$3;
+       var setSpecies$1 = setSpecies$5;
+       var DESCRIPTORS$6 = descriptors;
+       var fastKey = internalMetadata.exports.fastKey;
+       var InternalStateModule$1 = internalState;
+
+       var setInternalState$1 = InternalStateModule$1.set;
+       var internalStateGetterFor = InternalStateModule$1.getterFor;
+
+       var collectionStrong$2 = {
          getConstructor: function (wrapper, CONSTRUCTOR_NAME, IS_MAP, ADDER) {
-           var C = wrapper(function (that, iterable) {
-             anInstance(that, C, CONSTRUCTOR_NAME);
-             setInternalState$7(that, {
+           var Constructor = wrapper(function (that, iterable) {
+             anInstance$1(that, Prototype);
+             setInternalState$1(that, {
                type: CONSTRUCTOR_NAME,
-               index: objectCreate(null),
+               index: create$3(null),
                first: undefined,
                last: undefined,
                size: 0
              });
-             if (!descriptors) that.size = 0;
-             if (iterable != undefined) iterate_1(iterable, that[ADDER], that, IS_MAP);
+             if (!DESCRIPTORS$6) that.size = 0;
+             if (iterable != undefined) iterate(iterable, that[ADDER], { that: that, AS_ENTRIES: IS_MAP });
            });
 
+           var Prototype = Constructor.prototype;
+
            var getInternalState = internalStateGetterFor(CONSTRUCTOR_NAME);
 
            var define = function (that, key, value) {
                };
                if (!state.first) state.first = entry;
                if (previous) previous.next = entry;
-               if (descriptors) state.size++;
+               if (DESCRIPTORS$6) state.size++;
                else that.size++;
                // add to index
                if (index !== 'F') state.index[index] = entry;
              }
            };
 
-           redefineAll(C.prototype, {
-             // 23.1.3.1 Map.prototype.clear()
-             // 23.2.3.2 Set.prototype.clear()
+           redefineAll(Prototype, {
+             // `{ Map, Set }.prototype.clear()` methods
+             // https://tc39.es/ecma262/#sec-map.prototype.clear
+             // https://tc39.es/ecma262/#sec-set.prototype.clear
              clear: function clear() {
                var that = this;
                var state = getInternalState(that);
                  entry = entry.next;
                }
                state.first = state.last = undefined;
-               if (descriptors) state.size = 0;
+               if (DESCRIPTORS$6) state.size = 0;
                else that.size = 0;
              },
-             // 23.1.3.3 Map.prototype.delete(key)
-             // 23.2.3.4 Set.prototype.delete(value)
+             // `{ Map, Set }.prototype.delete(key)` methods
+             // https://tc39.es/ecma262/#sec-map.prototype.delete
+             // https://tc39.es/ecma262/#sec-set.prototype.delete
              'delete': function (key) {
                var that = this;
                var state = getInternalState(that);
                  if (next) next.previous = prev;
                  if (state.first == entry) state.first = next;
                  if (state.last == entry) state.last = prev;
-                 if (descriptors) state.size--;
+                 if (DESCRIPTORS$6) state.size--;
                  else that.size--;
                } return !!entry;
              },
-             // 23.2.3.6 Set.prototype.forEach(callbackfn, thisArg = undefined)
-             // 23.1.3.5 Map.prototype.forEach(callbackfn, thisArg = undefined)
+             // `{ Map, Set }.prototype.forEach(callbackfn, thisArg = undefined)` methods
+             // https://tc39.es/ecma262/#sec-map.prototype.foreach
+             // https://tc39.es/ecma262/#sec-set.prototype.foreach
              forEach: function forEach(callbackfn /* , that = undefined */) {
                var state = getInternalState(this);
-               var boundFunction = functionBindContext(callbackfn, arguments.length > 1 ? arguments[1] : undefined, 3);
+               var boundFunction = bind$6(callbackfn, arguments.length > 1 ? arguments[1] : undefined);
                var entry;
                while (entry = entry ? entry.next : state.first) {
                  boundFunction(entry.value, entry.key, this);
                  while (entry && entry.removed) entry = entry.previous;
                }
              },
-             // 23.1.3.7 Map.prototype.has(key)
-             // 23.2.3.7 Set.prototype.has(value)
+             // `{ Map, Set}.prototype.has(key)` methods
+             // https://tc39.es/ecma262/#sec-map.prototype.has
+             // https://tc39.es/ecma262/#sec-set.prototype.has
              has: function has(key) {
                return !!getEntry(this, key);
              }
            });
 
-           redefineAll(C.prototype, IS_MAP ? {
-             // 23.1.3.6 Map.prototype.get(key)
+           redefineAll(Prototype, IS_MAP ? {
+             // `Map.prototype.get(key)` method
+             // https://tc39.es/ecma262/#sec-map.prototype.get
              get: function get(key) {
                var entry = getEntry(this, key);
                return entry && entry.value;
              },
-             // 23.1.3.9 Map.prototype.set(key, value)
+             // `Map.prototype.set(key, value)` method
+             // https://tc39.es/ecma262/#sec-map.prototype.set
              set: function set(key, value) {
                return define(this, key === 0 ? 0 : key, value);
              }
            } : {
-             // 23.2.3.1 Set.prototype.add(value)
+             // `Set.prototype.add(value)` method
+             // https://tc39.es/ecma262/#sec-set.prototype.add
              add: function add(value) {
                return define(this, value = value === 0 ? 0 : value, value);
              }
            });
-           if (descriptors) defineProperty$8(C.prototype, 'size', {
+           if (DESCRIPTORS$6) defineProperty$2(Prototype, 'size', {
              get: function () {
                return getInternalState(this).size;
              }
            });
-           return C;
+           return Constructor;
          },
-         setStrong: function (C, CONSTRUCTOR_NAME, IS_MAP) {
+         setStrong: function (Constructor, CONSTRUCTOR_NAME, IS_MAP) {
            var ITERATOR_NAME = CONSTRUCTOR_NAME + ' Iterator';
            var getInternalCollectionState = internalStateGetterFor(CONSTRUCTOR_NAME);
            var getInternalIteratorState = internalStateGetterFor(ITERATOR_NAME);
-           // add .keys, .values, .entries, [@@iterator]
-           // 23.1.3.4, 23.1.3.8, 23.1.3.11, 23.1.3.12, 23.2.3.5, 23.2.3.8, 23.2.3.10, 23.2.3.11
-           defineIterator(C, CONSTRUCTOR_NAME, function (iterated, kind) {
-             setInternalState$7(this, {
+           // `{ Map, Set }.prototype.{ keys, values, entries, @@iterator }()` methods
+           // https://tc39.es/ecma262/#sec-map.prototype.entries
+           // https://tc39.es/ecma262/#sec-map.prototype.keys
+           // https://tc39.es/ecma262/#sec-map.prototype.values
+           // https://tc39.es/ecma262/#sec-map.prototype-@@iterator
+           // https://tc39.es/ecma262/#sec-set.prototype.entries
+           // https://tc39.es/ecma262/#sec-set.prototype.keys
+           // https://tc39.es/ecma262/#sec-set.prototype.values
+           // https://tc39.es/ecma262/#sec-set.prototype-@@iterator
+           defineIterator(Constructor, CONSTRUCTOR_NAME, function (iterated, kind) {
+             setInternalState$1(this, {
                type: ITERATOR_NAME,
                target: iterated,
                state: getInternalCollectionState(iterated),
              return { value: [entry.key, entry.value], done: false };
            }, IS_MAP ? 'entries' : 'values', !IS_MAP, true);
 
-           // add [@@species], 23.1.2.2, 23.2.2.2
-           setSpecies(CONSTRUCTOR_NAME);
+           // `{ Map, Set }.prototype[@@species]` accessors
+           // https://tc39.es/ecma262/#sec-get-map-@@species
+           // https://tc39.es/ecma262/#sec-get-set-@@species
+           setSpecies$1(CONSTRUCTOR_NAME);
          }
        };
 
+       var collection$1 = collection$2;
+       var collectionStrong$1 = collectionStrong$2;
+
        // `Set` constructor
-       // https://tc39.github.io/ecma262/#sec-set-objects
-       var es_set = collection('Set', function (init) {
+       // https://tc39.es/ecma262/#sec-set-objects
+       collection$1('Set', function (init) {
          return function Set() { return init(this, arguments.length ? arguments[0] : undefined); };
-       }, collectionStrong);
+       }, collectionStrong$1);
 
        function d3_ascending (a, b) {
          return a < b ? -1 : a > b ? 1 : a >= b ? 0 : NaN;
          };
        }
 
+       var defineWellKnownSymbol = defineWellKnownSymbol$4;
+
        // `Symbol.asyncIterator` well-known symbol
-       // https://tc39.github.io/ecma262/#sec-symbol.asynciterator
+       // https://tc39.es/ecma262/#sec-symbol.asynciterator
        defineWellKnownSymbol('asyncIterator');
 
-       var runtime_1 = createCommonjsModule(function (module) {
-         /**
-          * Copyright (c) 2014-present, Facebook, Inc.
-          *
-          * This source code is licensed under the MIT license found in the
-          * LICENSE file in the root directory of this source tree.
-          */
+       var runtime = {exports: {}};
+
+       (function (module) {
          var runtime = function (exports) {
 
            var Op = Object.prototype;
 
 
            var IteratorPrototype = {};
-
-           IteratorPrototype[iteratorSymbol] = function () {
+           define(IteratorPrototype, iteratorSymbol, function () {
              return this;
-           };
-
+           });
            var getProto = Object.getPrototypeOf;
            var NativeIteratorPrototype = getProto && getProto(getProto(values([])));
 
            }
 
            var Gp = GeneratorFunctionPrototype.prototype = Generator.prototype = Object.create(IteratorPrototype);
-           GeneratorFunction.prototype = Gp.constructor = GeneratorFunctionPrototype;
-           GeneratorFunctionPrototype.constructor = GeneratorFunction;
+           GeneratorFunction.prototype = GeneratorFunctionPrototype;
+           define(Gp, "constructor", GeneratorFunctionPrototype);
+           define(GeneratorFunctionPrototype, "constructor", GeneratorFunction);
            GeneratorFunction.displayName = define(GeneratorFunctionPrototype, toStringTagSymbol, "GeneratorFunction"); // Helper for defining the .next, .throw, and .return methods of the
            // Iterator interface in terms of a single ._invoke method.
 
            }
 
            defineIteratorMethods(AsyncIterator.prototype);
-
-           AsyncIterator.prototype[asyncIteratorSymbol] = function () {
+           define(AsyncIterator.prototype, asyncIteratorSymbol, function () {
              return this;
-           };
-
+           });
            exports.AsyncIterator = AsyncIterator; // Note that simple async functions are implemented on top of
            // AsyncIterator objects; they just return a Promise for the value of
            // the final result produced by the iterator.
            // object to not be returned from this call. This ensures that doesn't happen.
            // See https://github.com/facebook/regenerator/issues/274 for more details.
 
-           Gp[iteratorSymbol] = function () {
+           define(Gp, iteratorSymbol, function () {
              return this;
-           };
-
-           Gp.toString = function () {
+           });
+           define(Gp, "toString", function () {
              return "[object Generator]";
-           };
+           });
 
            function pushTryEntry(locs) {
              var entry = {
          // as the regeneratorRuntime namespace. Otherwise create a new empty
          // object. Either way, the resulting object will be used to initialize
          // the regeneratorRuntime variable at the top of this file.
-          module.exports );
+         module.exports );
 
          try {
            regeneratorRuntime = runtime;
          } catch (accidentalStrictMode) {
            // This module should not be running in strict mode, so the above
            // assignment should always work unless something is misconfigured. Just
-           // in case runtime.js accidentally runs in strict mode, we can escape
+           // in case runtime.js accidentally runs in strict mode, in modern engines
+           // we can explicitly access globalThis. In older engines we can escape
            // strict mode using a global Function call. This could conceivably fail
            // if a Content Security Policy forbids using Function, but in that case
            // the proper solution is to fix the accidental strict mode problem. If
            // you've misconfigured your bundler to force strict mode and applied a
            // CSP to forbid Function, and you're not willing to fix either of those
            // problems, please detail your unique predicament in a GitHub issue.
-           Function("r", "regeneratorRuntime = r")(runtime);
+           if ((typeof globalThis === "undefined" ? "undefined" : _typeof(globalThis)) === "object") {
+             globalThis.regeneratorRuntime = runtime;
+           } else {
+             Function("r", "regeneratorRuntime = r")(runtime);
+           }
          }
-       });
+       })(runtime);
 
-       var _marked = /*#__PURE__*/regeneratorRuntime.mark(numbers);
+       var _marked$3 = /*#__PURE__*/regeneratorRuntime.mark(numbers);
 
-       function number (x) {
+       function number$1 (x) {
          return x === null ? NaN : +x;
        }
        function numbers(values, valueof) {
                  return _context.stop();
              }
            }
-         }, _marked, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
+         }, _marked$3, null, [[2, 13, 16, 19], [23, 34, 37, 40]]);
        }
 
        var ascendingBisect = d3_bisector(d3_ascending);
        var bisectRight = ascendingBisect.right;
-       var bisectCenter = d3_bisector(number).center;
+       d3_bisector(number$1).center;
 
-       // `Array.prototype.fill` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.fill
-       _export({ target: 'Array', proto: true }, {
-         fill: arrayFill
-       });
+       var anObject$2 = anObject$n;
+       var iteratorClose = iteratorClose$2;
 
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables('fill');
+       // call something on iterator step with safe closing on error
+       var callWithSafeIterationClosing$1 = function (iterator, fn, value, ENTRIES) {
+         try {
+           return ENTRIES ? fn(anObject$2(value)[0], value[1]) : fn(value);
+         } catch (error) {
+           iteratorClose(iterator, 'throw', error);
+         }
+       };
+
+       var global$c = global$1m;
+       var bind$5 = functionBindContext;
+       var call$4 = functionCall;
+       var toObject$3 = toObject$j;
+       var callWithSafeIterationClosing = callWithSafeIterationClosing$1;
+       var isArrayIteratorMethod = isArrayIteratorMethod$3;
+       var isConstructor = isConstructor$4;
+       var lengthOfArrayLike$3 = lengthOfArrayLike$g;
+       var createProperty = createProperty$4;
+       var getIterator = getIterator$4;
+       var getIteratorMethod = getIteratorMethod$5;
 
-       var INCORRECT_ITERATION$1 = !checkCorrectnessOfIteration(function (iterable) {
+       var Array$1 = global$c.Array;
+
+       // `Array.from` method implementation
+       // https://tc39.es/ecma262/#sec-array.from
+       var arrayFrom$1 = function from(arrayLike /* , mapfn = undefined, thisArg = undefined */) {
+         var O = toObject$3(arrayLike);
+         var IS_CONSTRUCTOR = isConstructor(this);
+         var argumentsLength = arguments.length;
+         var mapfn = argumentsLength > 1 ? arguments[1] : undefined;
+         var mapping = mapfn !== undefined;
+         if (mapping) mapfn = bind$5(mapfn, argumentsLength > 2 ? arguments[2] : undefined);
+         var iteratorMethod = getIteratorMethod(O);
+         var index = 0;
+         var length, result, step, iterator, next, value;
+         // if the target is not iterable or it's an array with the default iterator - use a simple case
+         if (iteratorMethod && !(this == Array$1 && isArrayIteratorMethod(iteratorMethod))) {
+           iterator = getIterator(O, iteratorMethod);
+           next = iterator.next;
+           result = IS_CONSTRUCTOR ? new this() : [];
+           for (;!(step = call$4(next, iterator)).done; index++) {
+             value = mapping ? callWithSafeIterationClosing(iterator, mapfn, [step.value, index], true) : step.value;
+             createProperty(result, index, value);
+           }
+         } else {
+           length = lengthOfArrayLike$3(O);
+           result = IS_CONSTRUCTOR ? new this(length) : Array$1(length);
+           for (;length > index; index++) {
+             value = mapping ? mapfn(O[index], index) : O[index];
+             createProperty(result, index, value);
+           }
+         }
+         result.length = index;
+         return result;
+       };
+
+       var $$D = _export;
+       var from = arrayFrom$1;
+       var checkCorrectnessOfIteration = checkCorrectnessOfIteration$4;
+
+       var INCORRECT_ITERATION = !checkCorrectnessOfIteration(function (iterable) {
+         // eslint-disable-next-line es/no-array-from -- required for testing
          Array.from(iterable);
        });
 
        // `Array.from` method
-       // https://tc39.github.io/ecma262/#sec-array.from
-       _export({ target: 'Array', stat: true, forced: INCORRECT_ITERATION$1 }, {
-         from: arrayFrom
+       // https://tc39.es/ecma262/#sec-array.from
+       $$D({ target: 'Array', stat: true, forced: INCORRECT_ITERATION }, {
+         from: from
        });
 
-       var $some$1 = arrayIteration.some;
+       var $$C = _export;
+       var fill = arrayFill$1;
+       var addToUnscopables$4 = addToUnscopables$6;
 
+       // `Array.prototype.fill` method
+       // https://tc39.es/ecma262/#sec-array.prototype.fill
+       $$C({ target: 'Array', proto: true }, {
+         fill: fill
+       });
 
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables$4('fill');
+
+       var $$B = _export;
+       var $some = arrayIteration.some;
+       var arrayMethodIsStrict$4 = arrayMethodIsStrict$9;
 
-       var STRICT_METHOD$4 = arrayMethodIsStrict('some');
-       var USES_TO_LENGTH$7 = arrayMethodUsesToLength('some');
+       var STRICT_METHOD$4 = arrayMethodIsStrict$4('some');
 
        // `Array.prototype.some` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.some
-       _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$4 || !USES_TO_LENGTH$7 }, {
+       // https://tc39.es/ecma262/#sec-array.prototype.some
+       $$B({ target: 'Array', proto: true, forced: !STRICT_METHOD$4 }, {
          some: function some(callbackfn /* , thisArg */) {
-           return $some$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return $some(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
+       var TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS = typedArrayConstructorsRequireWrappers;
+       var exportTypedArrayStaticMethod = arrayBufferViewCore.exportTypedArrayStaticMethod;
+       var typedArrayFrom = typedArrayFrom$2;
+
+       // `%TypedArray%.from` method
+       // https://tc39.es/ecma262/#sec-%typedarray%.from
+       exportTypedArrayStaticMethod('from', typedArrayFrom, TYPED_ARRAYS_CONSTRUCTORS_REQUIRES_WRAPPERS);
+
+       var createTypedArrayConstructor = typedArrayConstructor.exports;
+
        // `Float64Array` constructor
-       // https://tc39.github.io/ecma262/#sec-typedarray-objects
-       typedArrayConstructor('Float64', function (init) {
+       // https://tc39.es/ecma262/#sec-typedarray-objects
+       createTypedArrayConstructor('Float64', function (init) {
          return function Float64Array(data, byteOffset, length) {
            return init(this, data, byteOffset, length);
          };
        });
 
-       var exportTypedArrayStaticMethod$1 = arrayBufferViewCore.exportTypedArrayStaticMethod;
-
-
-       // `%TypedArray%.from` method
-       // https://tc39.github.io/ecma262/#sec-%typedarray%.from
-       exportTypedArrayStaticMethod$1('from', typedArrayFrom, typedArrayConstructorsRequireWrappers);
-
        function d3_descending (a, b) {
          return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
        }
        // https://github.com/python/cpython/blob/a74eea238f5baba15797e2e8b570d153bc8690a7/Modules/mathmodule.c#L1423
        var Adder = /*#__PURE__*/function () {
          function Adder() {
-           _classCallCheck(this, Adder);
+           _classCallCheck$1(this, Adder);
 
            this._partials = new Float64Array(32);
            this._n = 0;
          }
 
-         _createClass(Adder, [{
+         _createClass$1(Adder, [{
            key: "add",
            value: function add(x) {
              var p = this._partials;
          return Adder;
        }();
 
+       var $$A = _export;
+       var DESCRIPTORS$5 = descriptors;
+       var defineProperties$1 = objectDefineProperties;
+
+       // `Object.defineProperties` method
+       // https://tc39.es/ecma262/#sec-object.defineproperties
+       $$A({ target: 'Object', stat: true, forced: !DESCRIPTORS$5, sham: !DESCRIPTORS$5 }, {
+         defineProperties: defineProperties$1
+       });
+
+       var collection = collection$2;
+       var collectionStrong = collectionStrong$2;
+
        // `Map` constructor
-       // https://tc39.github.io/ecma262/#sec-map-objects
-       var es_map = collection('Map', function (init) {
+       // https://tc39.es/ecma262/#sec-map-objects
+       collection('Map', function (init) {
          return function Map() { return init(this, arguments.length ? arguments[0] : undefined); };
        }, collectionStrong);
 
+       var $$z = _export;
+       var uncurryThis$f = functionUncurryThis;
+       var aCallable$1 = aCallable$a;
+       var toObject$2 = toObject$j;
+       var lengthOfArrayLike$2 = lengthOfArrayLike$g;
+       var toString$a = toString$k;
+       var fails$b = fails$S;
+       var internalSort = arraySort$1;
+       var arrayMethodIsStrict$3 = arrayMethodIsStrict$9;
+       var FF = engineFfVersion;
+       var IE_OR_EDGE = engineIsIeOrEdge;
+       var V8 = engineV8Version;
+       var WEBKIT = engineWebkitVersion;
+
+       var test = [];
+       var un$Sort = uncurryThis$f(test.sort);
+       var push$3 = uncurryThis$f(test.push);
+
+       // IE8-
+       var FAILS_ON_UNDEFINED = fails$b(function () {
+         test.sort(undefined);
+       });
+       // V8 bug
+       var FAILS_ON_NULL = fails$b(function () {
+         test.sort(null);
+       });
+       // Old WebKit
+       var STRICT_METHOD$3 = arrayMethodIsStrict$3('sort');
+
+       var STABLE_SORT = !fails$b(function () {
+         // feature detection can be too slow, so check engines versions
+         if (V8) return V8 < 70;
+         if (FF && FF > 3) return;
+         if (IE_OR_EDGE) return true;
+         if (WEBKIT) return WEBKIT < 603;
+
+         var result = '';
+         var code, chr, value, index;
+
+         // generate an array with more 512 elements (Chakra and old V8 fails only in this case)
+         for (code = 65; code < 76; code++) {
+           chr = String.fromCharCode(code);
+
+           switch (code) {
+             case 66: case 69: case 70: case 72: value = 3; break;
+             case 68: case 71: value = 4; break;
+             default: value = 2;
+           }
+
+           for (index = 0; index < 47; index++) {
+             test.push({ k: chr + index, v: value });
+           }
+         }
+
+         test.sort(function (a, b) { return b.v - a.v; });
+
+         for (index = 0; index < test.length; index++) {
+           chr = test[index].k.charAt(0);
+           if (result.charAt(result.length - 1) !== chr) result += chr;
+         }
+
+         return result !== 'DGBEFHACIJK';
+       });
+
+       var FORCED$7 = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$3 || !STABLE_SORT;
+
+       var getSortCompare = function (comparefn) {
+         return function (x, y) {
+           if (y === undefined) return -1;
+           if (x === undefined) return 1;
+           if (comparefn !== undefined) return +comparefn(x, y) || 0;
+           return toString$a(x) > toString$a(y) ? 1 : -1;
+         };
+       };
+
+       // `Array.prototype.sort` method
+       // https://tc39.es/ecma262/#sec-array.prototype.sort
+       $$z({ target: 'Array', proto: true, forced: FORCED$7 }, {
+         sort: function sort(comparefn) {
+           if (comparefn !== undefined) aCallable$1(comparefn);
+
+           var array = toObject$2(this);
+
+           if (STABLE_SORT) return comparefn === undefined ? un$Sort(array) : un$Sort(array, comparefn);
+
+           var items = [];
+           var arrayLength = lengthOfArrayLike$2(array);
+           var itemsLength, index;
+
+           for (index = 0; index < arrayLength; index++) {
+             if (index in array) push$3(items, array[index]);
+           }
+
+           internalSort(items, getSortCompare(comparefn));
+
+           itemsLength = items.length;
+           index = 0;
+
+           while (index < itemsLength) array[index] = items[index++];
+           while (index < arrayLength) delete array[index++];
+
+           return array;
+         }
+       });
+
        var e10 = Math.sqrt(50),
            e5 = Math.sqrt(10),
            e2 = Math.sqrt(2);
          if ((step = tickIncrement(start, stop, count)) === 0 || !isFinite(step)) return [];
 
          if (step > 0) {
-           start = Math.ceil(start / step);
-           stop = Math.floor(stop / step);
-           ticks = new Array(n = Math.ceil(stop - start + 1));
+           var r0 = Math.round(start / step),
+               r1 = Math.round(stop / step);
+           if (r0 * step < start) ++r0;
+           if (r1 * step > stop) --r1;
+           ticks = new Array(n = r1 - r0 + 1);
 
            while (++i < n) {
-             ticks[i] = (start + i) * step;
+             ticks[i] = (r0 + i) * step;
            }
          } else {
            step = -step;
-           start = Math.ceil(start * step);
-           stop = Math.floor(stop * step);
-           ticks = new Array(n = Math.ceil(stop - start + 1));
+
+           var _r = Math.round(start * step),
+               _r2 = Math.round(stop * step);
+
+           if (_r / step < start) ++_r;
+           if (_r2 / step > stop) --_r2;
+           ticks = new Array(n = _r2 - _r + 1);
 
            while (++i < n) {
-             ticks[i] = (start + i) / step;
+             ticks[i] = (_r + i) / step;
            }
          }
 
          return stop < start ? -step1 : step1;
        }
 
-       function max$4(values, valueof) {
+       function max(values, valueof) {
          var max;
 
          if (valueof === undefined) {
          return max;
        }
 
-       function min$7(values, valueof) {
+       function min$2(values, valueof) {
          var min;
 
          if (valueof === undefined) {
 
        // ISC license, Copyright 2018 Vladimir Agafonkin.
 
-       function quickselect(array, k) {
+       function quickselect$3(array, k) {
          var left = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : 0;
          var right = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : array.length - 1;
          var compare = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : d3_ascending;
              var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
              var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
              var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-             quickselect(array, k, newLeft, newRight, compare);
+             quickselect$3(array, k, newLeft, newRight, compare);
            }
 
            var t = array[k];
            var i = left;
            var j = right;
-           swap(array, left, k);
-           if (compare(array[right], t) > 0) swap(array, left, right);
+           swap$1(array, left, k);
+           if (compare(array[right], t) > 0) swap$1(array, left, right);
 
            while (i < j) {
-             swap(array, i, j), ++i, --j;
+             swap$1(array, i, j), ++i, --j;
 
              while (compare(array[i], t) < 0) {
                ++i;
              }
            }
 
-           if (compare(array[left], t) === 0) swap(array, left, j);else ++j, swap(array, j, right);
+           if (compare(array[left], t) === 0) swap$1(array, left, j);else ++j, swap$1(array, j, right);
            if (j <= k) left = j + 1;
            if (k <= j) right = j - 1;
          }
          return array;
        }
 
-       function swap(array, i, j) {
+       function swap$1(array, i, j) {
          var t = array[i];
          array[i] = array[j];
          array[j] = t;
        function quantile(values, p, valueof) {
          values = Float64Array.from(numbers(values, valueof));
          if (!(n = values.length)) return;
-         if ((p = +p) <= 0 || n < 2) return min$7(values);
-         if (p >= 1) return max$4(values);
+         if ((p = +p) <= 0 || n < 2) return min$2(values);
+         if (p >= 1) return max(values);
          var n,
              i = (n - 1) * p,
              i0 = Math.floor(i),
-             value0 = max$4(quickselect(values, i0).subarray(0, i0 + 1)),
-             value1 = min$7(values.subarray(i0 + 1));
+             value0 = max(quickselect$3(values, i0).subarray(0, i0 + 1)),
+             value1 = min$2(values.subarray(i0 + 1));
          return value0 + (value1 - value0) * (i - i0);
        }
 
          return quantile(values, 0.5, valueof);
        }
 
-       var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(flatten);
+       var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(flatten);
 
        function flatten(arrays) {
          var _iterator, _step, array;
                  return _context.stop();
              }
            }
-         }, _marked$1, null, [[1, 10, 13, 16]]);
+         }, _marked$2, null, [[1, 10, 13, 16]]);
        }
 
-       function merge(arrays) {
+       function merge$4(arrays) {
          return Array.from(flatten(arrays));
        }
 
-       function range (start, stop, step) {
+       function range$1 (start, stop, step) {
          start = +start, stop = +stop, step = (n = arguments.length) < 2 ? (stop = start, start = 0, 1) : n < 3 ? 1 : +step;
          var i = -1,
              n = Math.max(0, Math.ceil((stop - start) / step)) | 0,
          return range;
        }
 
-       var test$2 = [];
-       var nativeSort = test$2.sort;
-
-       // IE8-
-       var FAILS_ON_UNDEFINED = fails(function () {
-         test$2.sort(undefined);
-       });
-       // V8 bug
-       var FAILS_ON_NULL = fails(function () {
-         test$2.sort(null);
-       });
-       // Old WebKit
-       var STRICT_METHOD$5 = arrayMethodIsStrict('sort');
-
-       var FORCED$a = FAILS_ON_UNDEFINED || !FAILS_ON_NULL || !STRICT_METHOD$5;
-
-       // `Array.prototype.sort` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.sort
-       _export({ target: 'Array', proto: true, forced: FORCED$a }, {
-         sort: function sort(comparefn) {
-           return comparefn === undefined
-             ? nativeSort.call(toObject(this))
-             : nativeSort.call(toObject(this), aFunction$1(comparefn));
-         }
-       });
-
        // `SameValue` abstract operation
-       // https://tc39.github.io/ecma262/#sec-samevalue
-       var sameValue = Object.is || function is(x, y) {
-         // eslint-disable-next-line no-self-compare
+       // https://tc39.es/ecma262/#sec-samevalue
+       // eslint-disable-next-line es/no-object-is -- safe
+       var sameValue$1 = Object.is || function is(x, y) {
+         // eslint-disable-next-line no-self-compare -- NaN check
          return x === y ? x !== 0 || 1 / x === 1 / y : x != x && y != y;
        };
 
+       var $$y = _export;
+
+       // eslint-disable-next-line es/no-math-hypot -- required for testing
        var $hypot = Math.hypot;
-       var abs$1 = Math.abs;
-       var sqrt = Math.sqrt;
+       var abs$3 = Math.abs;
+       var sqrt$1 = Math.sqrt;
 
        // Chrome 77 bug
        // https://bugs.chromium.org/p/v8/issues/detail?id=9546
        var BUGGY = !!$hypot && $hypot(Infinity, NaN) !== Infinity;
 
        // `Math.hypot` method
-       // https://tc39.github.io/ecma262/#sec-math.hypot
-       _export({ target: 'Math', stat: true, forced: BUGGY }, {
-         hypot: function hypot(value1, value2) { // eslint-disable-line no-unused-vars
+       // https://tc39.es/ecma262/#sec-math.hypot
+       $$y({ target: 'Math', stat: true, forced: BUGGY }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         hypot: function hypot(value1, value2) {
            var sum = 0;
            var i = 0;
            var aLen = arguments.length;
            var larg = 0;
            var arg, div;
            while (i < aLen) {
-             arg = abs$1(arguments[i++]);
+             arg = abs$3(arguments[i++]);
              if (larg < arg) {
                div = larg / arg;
                sum = sum * div * div + 1;
                sum += div * div;
              } else sum += arg;
            }
-           return larg === Infinity ? Infinity : larg * sqrt(sum);
+           return larg === Infinity ? Infinity : larg * sqrt$1(sum);
          }
        });
 
        // `Math.sign` method implementation
-       // https://tc39.github.io/ecma262/#sec-math.sign
+       // https://tc39.es/ecma262/#sec-math.sign
+       // eslint-disable-next-line es/no-math-sign -- safe
        var mathSign = Math.sign || function sign(x) {
-         // eslint-disable-next-line no-self-compare
+         // eslint-disable-next-line no-self-compare -- NaN check
          return (x = +x) == 0 || x != x ? x : x < 0 ? -1 : 1;
        };
 
+       var $$x = _export;
+       var sign$1 = mathSign;
+
        // `Math.sign` method
-       // https://tc39.github.io/ecma262/#sec-math.sign
-       _export({ target: 'Math', stat: true }, {
-         sign: mathSign
+       // https://tc39.es/ecma262/#sec-math.sign
+       $$x({ target: 'Math', stat: true }, {
+         sign: sign$1
        });
 
-       var epsilon = 1e-6;
-       var epsilon2 = 1e-12;
+       var epsilon$1 = 1e-6;
+       var epsilon2$1 = 1e-12;
        var pi = Math.PI;
        var halfPi = pi / 2;
        var quarterPi = pi / 4;
        var tau = pi * 2;
-       var degrees = 180 / pi;
+       var degrees$1 = 180 / pi;
        var radians = pi / 180;
        var abs$2 = Math.abs;
        var atan = Math.atan;
        var atan2 = Math.atan2;
        var cos = Math.cos;
-       var exp = Math.exp;
-       var hypot = Math.hypot;
+       var exp$2 = Math.exp;
        var log$1 = Math.log;
        var sin = Math.sin;
        var sign = Math.sign || function (x) {
          return x > 0 ? 1 : x < 0 ? -1 : 0;
        };
-       var sqrt$1 = Math.sqrt;
+       var sqrt = Math.sqrt;
        var tan = Math.tan;
        function acos(x) {
          return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
          return x > 1 ? halfPi : x < -1 ? -halfPi : Math.asin(x);
        }
 
-       function noop() {}
+       function noop$1() {}
 
        function streamGeometry(geometry, stream) {
          if (geometry && streamGeometryType.hasOwnProperty(geometry.type)) {
          }
        }
 
-       var areaRingSum = new Adder(); // hello?
+       var areaRingSum$1 = new Adder(); // hello?
 
-       var areaSum = new Adder(),
-           lambda00,
-           phi00,
-           lambda0,
-           cosPhi0,
-           sinPhi0;
-       var areaStream = {
-         point: noop,
-         lineStart: noop,
-         lineEnd: noop,
+       var areaSum$1 = new Adder(),
+           lambda00$1,
+           phi00$1,
+           lambda0$2,
+           cosPhi0$1,
+           sinPhi0$1;
+       var areaStream$1 = {
+         point: noop$1,
+         lineStart: noop$1,
+         lineEnd: noop$1,
          polygonStart: function polygonStart() {
-           areaRingSum = new Adder();
-           areaStream.lineStart = areaRingStart;
-           areaStream.lineEnd = areaRingEnd;
+           areaRingSum$1 = new Adder();
+           areaStream$1.lineStart = areaRingStart$1;
+           areaStream$1.lineEnd = areaRingEnd$1;
          },
          polygonEnd: function polygonEnd() {
-           var areaRing = +areaRingSum;
-           areaSum.add(areaRing < 0 ? tau + areaRing : areaRing);
-           this.lineStart = this.lineEnd = this.point = noop;
+           var areaRing = +areaRingSum$1;
+           areaSum$1.add(areaRing < 0 ? tau + areaRing : areaRing);
+           this.lineStart = this.lineEnd = this.point = noop$1;
          },
          sphere: function sphere() {
-           areaSum.add(tau);
+           areaSum$1.add(tau);
          }
        };
 
-       function areaRingStart() {
-         areaStream.point = areaPointFirst;
+       function areaRingStart$1() {
+         areaStream$1.point = areaPointFirst$1;
        }
 
-       function areaRingEnd() {
-         areaPoint(lambda00, phi00);
+       function areaRingEnd$1() {
+         areaPoint$1(lambda00$1, phi00$1);
        }
 
-       function areaPointFirst(lambda, phi) {
-         areaStream.point = areaPoint;
-         lambda00 = lambda, phi00 = phi;
+       function areaPointFirst$1(lambda, phi) {
+         areaStream$1.point = areaPoint$1;
+         lambda00$1 = lambda, phi00$1 = phi;
          lambda *= radians, phi *= radians;
-         lambda0 = lambda, cosPhi0 = cos(phi = phi / 2 + quarterPi), sinPhi0 = sin(phi);
+         lambda0$2 = lambda, cosPhi0$1 = cos(phi = phi / 2 + quarterPi), sinPhi0$1 = sin(phi);
        }
 
-       function areaPoint(lambda, phi) {
+       function areaPoint$1(lambda, phi) {
          lambda *= radians, phi *= radians;
          phi = phi / 2 + quarterPi; // half the angular distance from south pole
          // Spherical excess E for a spherical triangle with vertices: south pole,
          // previous point, current point.  Uses a formula derived from Cagnoli’s
          // theorem.  See Todhunter, Spherical Trig. (1871), Sec. 103, Eq. (2).
 
-         var dLambda = lambda - lambda0,
+         var dLambda = lambda - lambda0$2,
              sdLambda = dLambda >= 0 ? 1 : -1,
              adLambda = sdLambda * dLambda,
              cosPhi = cos(phi),
              sinPhi = sin(phi),
-             k = sinPhi0 * sinPhi,
-             u = cosPhi0 * cosPhi + k * cos(adLambda),
+             k = sinPhi0$1 * sinPhi,
+             u = cosPhi0$1 * cosPhi + k * cos(adLambda),
              v = k * sdLambda * sin(adLambda);
-         areaRingSum.add(atan2(v, u)); // Advance the previous points.
+         areaRingSum$1.add(atan2(v, u)); // Advance the previous points.
 
-         lambda0 = lambda, cosPhi0 = cosPhi, sinPhi0 = sinPhi;
+         lambda0$2 = lambda, cosPhi0$1 = cosPhi, sinPhi0$1 = sinPhi;
        }
 
        function d3_geoArea (object) {
-         areaSum = new Adder();
-         d3_geoStream(object, areaStream);
-         return areaSum * 2;
+         areaSum$1 = new Adder();
+         d3_geoStream(object, areaStream$1);
+         return areaSum$1 * 2;
        }
 
        function spherical(cartesian) {
        } // TODO return d
 
        function cartesianNormalizeInPlace(d) {
-         var l = sqrt$1(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
+         var l = sqrt(d[0] * d[0] + d[1] * d[1] + d[2] * d[2]);
          d[0] /= l, d[1] /= l, d[2] /= l;
        }
 
        var lambda0$1, phi0, lambda1, phi1, // bounds
        lambda2, // previous lambda-coordinate
-       lambda00$1, phi00$1, // first point
+       lambda00, phi00, // first point
        p0, // previous 3D point
-       deltaSum, ranges, range$1;
-       var boundsStream = {
-         point: boundsPoint,
+       deltaSum, ranges, range;
+       var boundsStream$1 = {
+         point: boundsPoint$1,
          lineStart: boundsLineStart,
          lineEnd: boundsLineEnd,
          polygonStart: function polygonStart() {
-           boundsStream.point = boundsRingPoint;
-           boundsStream.lineStart = boundsRingStart;
-           boundsStream.lineEnd = boundsRingEnd;
+           boundsStream$1.point = boundsRingPoint;
+           boundsStream$1.lineStart = boundsRingStart;
+           boundsStream$1.lineEnd = boundsRingEnd;
            deltaSum = new Adder();
-           areaStream.polygonStart();
+           areaStream$1.polygonStart();
          },
          polygonEnd: function polygonEnd() {
-           areaStream.polygonEnd();
-           boundsStream.point = boundsPoint;
-           boundsStream.lineStart = boundsLineStart;
-           boundsStream.lineEnd = boundsLineEnd;
-           if (areaRingSum < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);else if (deltaSum > epsilon) phi1 = 90;else if (deltaSum < -epsilon) phi0 = -90;
-           range$1[0] = lambda0$1, range$1[1] = lambda1;
+           areaStream$1.polygonEnd();
+           boundsStream$1.point = boundsPoint$1;
+           boundsStream$1.lineStart = boundsLineStart;
+           boundsStream$1.lineEnd = boundsLineEnd;
+           if (areaRingSum$1 < 0) lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);else if (deltaSum > epsilon$1) phi1 = 90;else if (deltaSum < -epsilon$1) phi0 = -90;
+           range[0] = lambda0$1, range[1] = lambda1;
          },
          sphere: function sphere() {
            lambda0$1 = -(lambda1 = 180), phi0 = -(phi1 = 90);
          }
        };
 
-       function boundsPoint(lambda, phi) {
-         ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
+       function boundsPoint$1(lambda, phi) {
+         ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
          if (phi < phi0) phi0 = phi;
          if (phi > phi1) phi1 = phi;
        }
            inflection = spherical(inflection);
            var delta = lambda - lambda2,
                sign = delta > 0 ? 1 : -1,
-               lambdai = inflection[0] * degrees * sign,
+               lambdai = inflection[0] * degrees$1 * sign,
                phii,
                antimeridian = abs$2(delta) > 180;
 
            if (antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-             phii = inflection[1] * degrees;
+             phii = inflection[1] * degrees$1;
              if (phii > phi1) phi1 = phii;
            } else if (lambdai = (lambdai + 360) % 360 - 180, antimeridian ^ (sign * lambda2 < lambdai && lambdai < sign * lambda)) {
-             phii = -inflection[1] * degrees;
+             phii = -inflection[1] * degrees$1;
              if (phii < phi0) phi0 = phii;
            } else {
              if (phi < phi0) phi0 = phi;
              }
            }
          } else {
-           ranges.push(range$1 = [lambda0$1 = lambda, lambda1 = lambda]);
+           ranges.push(range = [lambda0$1 = lambda, lambda1 = lambda]);
          }
 
          if (phi < phi0) phi0 = phi;
        }
 
        function boundsLineStart() {
-         boundsStream.point = linePoint;
+         boundsStream$1.point = linePoint;
        }
 
        function boundsLineEnd() {
-         range$1[0] = lambda0$1, range$1[1] = lambda1;
-         boundsStream.point = boundsPoint;
+         range[0] = lambda0$1, range[1] = lambda1;
+         boundsStream$1.point = boundsPoint$1;
          p0 = null;
        }
 
            var delta = lambda - lambda2;
            deltaSum.add(abs$2(delta) > 180 ? delta + (delta > 0 ? 360 : -360) : delta);
          } else {
-           lambda00$1 = lambda, phi00$1 = phi;
+           lambda00 = lambda, phi00 = phi;
          }
 
-         areaStream.point(lambda, phi);
+         areaStream$1.point(lambda, phi);
          linePoint(lambda, phi);
        }
 
        function boundsRingStart() {
-         areaStream.lineStart();
+         areaStream$1.lineStart();
        }
 
        function boundsRingEnd() {
-         boundsRingPoint(lambda00$1, phi00$1);
-         areaStream.lineEnd();
-         if (abs$2(deltaSum) > epsilon) lambda0$1 = -(lambda1 = 180);
-         range$1[0] = lambda0$1, range$1[1] = lambda1;
+         boundsRingPoint(lambda00, phi00);
+         areaStream$1.lineEnd();
+         if (abs$2(deltaSum) > epsilon$1) lambda0$1 = -(lambda1 = 180);
+         range[0] = lambda0$1, range[1] = lambda1;
          p0 = null;
        } // Finds the left-right distance between two longitudes.
        // This is almost the same as (lambda1 - lambda0 + 360°) % 360°, except that we want
          var i, n, a, b, merged, deltaMax, delta;
          phi1 = lambda1 = -(lambda0$1 = phi0 = Infinity);
          ranges = [];
-         d3_geoStream(feature, boundsStream); // First, sort ranges by their minimum longitudes.
+         d3_geoStream(feature, boundsStream$1); // First, sort ranges by their minimum longitudes.
 
          if (n = ranges.length) {
            ranges.sort(rangeCompare); // Then, merge any ranges that overlap.
            }
          }
 
-         ranges = range$1 = null;
+         ranges = range = null;
          return lambda0$1 === Infinity || phi0 === Infinity ? [[NaN, NaN], [NaN, NaN]] : [[lambda0$1, phi0], [lambda1, phi1]];
        }
 
-       var W0, W1, X0, Y0, Z0, X1, Y1, Z1, X2, Y2, Z2, lambda00$2, phi00$2, // first point
-       x0, y0, z0; // previous point
-
-       var centroidStream = {
-         sphere: noop,
-         point: centroidPoint,
-         lineStart: centroidLineStart,
-         lineEnd: centroidLineEnd,
-         polygonStart: function polygonStart() {
-           centroidStream.lineStart = centroidRingStart;
-           centroidStream.lineEnd = centroidRingEnd;
-         },
-         polygonEnd: function polygonEnd() {
-           centroidStream.lineStart = centroidLineStart;
-           centroidStream.lineEnd = centroidLineEnd;
-         }
-       }; // Arithmetic mean of Cartesian vectors.
-
-       function centroidPoint(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         var cosPhi = cos(phi);
-         centroidPointCartesian(cosPhi * cos(lambda), cosPhi * sin(lambda), sin(phi));
-       }
-
-       function centroidPointCartesian(x, y, z) {
-         ++W0;
-         X0 += (x - X0) / W0;
-         Y0 += (y - Y0) / W0;
-         Z0 += (z - Z0) / W0;
-       }
-
-       function centroidLineStart() {
-         centroidStream.point = centroidLinePointFirst;
-       }
-
-       function centroidLinePointFirst(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         var cosPhi = cos(phi);
-         x0 = cosPhi * cos(lambda);
-         y0 = cosPhi * sin(lambda);
-         z0 = sin(phi);
-         centroidStream.point = centroidLinePoint;
-         centroidPointCartesian(x0, y0, z0);
-       }
-
-       function centroidLinePoint(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         var cosPhi = cos(phi),
-             x = cosPhi * cos(lambda),
-             y = cosPhi * sin(lambda),
-             z = sin(phi),
-             w = atan2(sqrt$1((w = y0 * z - z0 * y) * w + (w = z0 * x - x0 * z) * w + (w = x0 * y - y0 * x) * w), x0 * x + y0 * y + z0 * z);
-         W1 += w;
-         X1 += w * (x0 + (x0 = x));
-         Y1 += w * (y0 + (y0 = y));
-         Z1 += w * (z0 + (z0 = z));
-         centroidPointCartesian(x0, y0, z0);
-       }
-
-       function centroidLineEnd() {
-         centroidStream.point = centroidPoint;
-       } // See J. E. Brock, The Inertia Tensor for a Spherical Triangle,
-       // J. Applied Mechanics 42, 239 (1975).
-
-
-       function centroidRingStart() {
-         centroidStream.point = centroidRingPointFirst;
-       }
-
-       function centroidRingEnd() {
-         centroidRingPoint(lambda00$2, phi00$2);
-         centroidStream.point = centroidPoint;
-       }
-
-       function centroidRingPointFirst(lambda, phi) {
-         lambda00$2 = lambda, phi00$2 = phi;
-         lambda *= radians, phi *= radians;
-         centroidStream.point = centroidRingPoint;
-         var cosPhi = cos(phi);
-         x0 = cosPhi * cos(lambda);
-         y0 = cosPhi * sin(lambda);
-         z0 = sin(phi);
-         centroidPointCartesian(x0, y0, z0);
-       }
-
-       function centroidRingPoint(lambda, phi) {
-         lambda *= radians, phi *= radians;
-         var cosPhi = cos(phi),
-             x = cosPhi * cos(lambda),
-             y = cosPhi * sin(lambda),
-             z = sin(phi),
-             cx = y0 * z - z0 * y,
-             cy = z0 * x - x0 * z,
-             cz = x0 * y - y0 * x,
-             m = hypot(cx, cy, cz),
-             w = asin(m),
-             // line weight = angle
-         v = m && -w / m; // area weight multiplier
-
-         X2.add(v * cx);
-         Y2.add(v * cy);
-         Z2.add(v * cz);
-         W1 += w;
-         X1 += w * (x0 + (x0 = x));
-         Y1 += w * (y0 + (y0 = y));
-         Z1 += w * (z0 + (z0 = z));
-         centroidPointCartesian(x0, y0, z0);
-       }
-
-       function d3_geoCentroid (object) {
-         W0 = W1 = X0 = Y0 = Z0 = X1 = Y1 = Z1 = 0;
-         X2 = new Adder();
-         Y2 = new Adder();
-         Z2 = new Adder();
-         d3_geoStream(object, centroidStream);
-         var x = +X2,
-             y = +Y2,
-             z = +Z2,
-             m = hypot(x, y, z); // If the area-weighted ccentroid is undefined, fall back to length-weighted ccentroid.
-
-         if (m < epsilon2) {
-           x = X1, y = Y1, z = Z1; // If the feature has zero length, fall back to arithmetic mean of point vectors.
-
-           if (W1 < epsilon) x = X0, y = Y0, z = Z0;
-           m = hypot(x, y, z); // If the feature still has an undefined ccentroid, then return.
-
-           if (m < epsilon2) return [NaN, NaN];
-         }
-
-         return [atan2(y, x) * degrees, asin(z / m) * degrees];
-       }
-
        function compose (a, b) {
          function compose(x, y) {
            return x = a(x, y), b(x[0], x[1]);
 
          function forward(coordinates) {
            coordinates = rotate(coordinates[0] * radians, coordinates[1] * radians);
-           return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+           return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
          }
 
          forward.invert = function (coordinates) {
            coordinates = rotate.invert(coordinates[0] * radians, coordinates[1] * radians);
-           return coordinates[0] *= degrees, coordinates[1] *= degrees, coordinates;
+           return coordinates[0] *= degrees$1, coordinates[1] *= degrees$1, coordinates;
          };
 
          return forward;
          point = cartesian(point), point[0] -= cosRadius;
          cartesianNormalizeInPlace(point);
          var radius = acos(-point[1]);
-         return ((-point[2] < 0 ? -radius : radius) + tau - epsilon) % tau;
+         return ((-point[2] < 0 ? -radius : radius) + tau - epsilon$1) % tau;
        }
 
        function clipBuffer () {
            lineStart: function lineStart() {
              lines.push(line = []);
            },
-           lineEnd: noop,
+           lineEnd: noop$1,
            rejoin: function rejoin() {
              if (lines.length > 1) lines.push(lines.pop().concat(lines.shift()));
            },
        }
 
        function pointEqual (a, b) {
-         return abs$2(a[0] - b[0]) < epsilon && abs$2(a[1] - b[1]) < epsilon;
+         return abs$2(a[0] - b[0]) < epsilon$1 && abs$2(a[1] - b[1]) < epsilon$1;
        }
 
        function Intersection(point, points, other, entry) {
              } // handle degenerate cases by moving the point
 
 
-             p1[0] += 2 * epsilon;
+             p1[0] += 2 * epsilon$1;
            }
 
            subject.push(x = new Intersection(p0, segment, null, true));
              angle = 0,
              winding = 0;
          var sum = new Adder();
-         if (sinPhi === 1) phi = halfPi + epsilon;else if (sinPhi === -1) phi = -halfPi - epsilon;
+         if (sinPhi === 1) phi = halfPi + epsilon$1;else if (sinPhi === -1) phi = -halfPi - epsilon$1;
 
          for (var i = 0, n = polygon.length; i < n; ++i) {
            if (!(m = (ring = polygon[i]).length)) continue;
          // same side as the South pole.
 
 
-         return (angle < -epsilon || angle < epsilon && sum < -epsilon2) ^ winding & 1;
+         return (angle < -epsilon$1 || angle < epsilon$1 && sum < -epsilon2$1) ^ winding & 1;
        }
 
        function clip (pointVisible, clipLine, interpolate, start) {
                clip.point = point;
                clip.lineStart = lineStart;
                clip.lineEnd = lineEnd;
-               segments = merge(segments);
+               segments = merge$4(segments);
                var startInside = polygonContains(polygon, start);
 
                if (segments.length) {
 
 
        function compareIntersection(a, b) {
-         return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon : halfPi - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon : halfPi - b[1]);
+         return ((a = a.x)[0] < 0 ? a[1] - halfPi - epsilon$1 : halfPi - a[1]) - ((b = b.x)[0] < 0 ? b[1] - halfPi - epsilon$1 : halfPi - b[1]);
        }
 
        var clipAntimeridian = clip(function () {
              var sign1 = lambda1 > 0 ? pi : -pi,
                  delta = abs$2(lambda1 - lambda0);
 
-             if (abs$2(delta - pi) < epsilon) {
+             if (abs$2(delta - pi) < epsilon$1) {
                // line crosses a pole
                stream.point(lambda0, phi0 = (phi0 + phi1) / 2 > 0 ? halfPi : -halfPi);
                stream.point(sign0, phi0);
                _clean = 0;
              } else if (sign0 !== sign1 && delta >= pi) {
                // line crosses antimeridian
-               if (abs$2(lambda0 - sign0) < epsilon) lambda0 -= sign0 * epsilon; // handle degeneracies
+               if (abs$2(lambda0 - sign0) < epsilon$1) lambda0 -= sign0 * epsilon$1; // handle degeneracies
 
-               if (abs$2(lambda1 - sign1) < epsilon) lambda1 -= sign1 * epsilon;
+               if (abs$2(lambda1 - sign1) < epsilon$1) lambda1 -= sign1 * epsilon$1;
                phi0 = clipAntimeridianIntersect(lambda0, phi0, lambda1, phi1);
                stream.point(sign0, phi0);
                stream.lineEnd();
          var cosPhi0,
              cosPhi1,
              sinLambda0Lambda1 = sin(lambda0 - lambda1);
-         return abs$2(sinLambda0Lambda1) > epsilon ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1) - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0)) / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) : (phi0 + phi1) / 2;
+         return abs$2(sinLambda0Lambda1) > epsilon$1 ? atan((sin(phi0) * (cosPhi1 = cos(phi1)) * sin(lambda1) - sin(phi1) * (cosPhi0 = cos(phi0)) * sin(lambda0)) / (cosPhi0 * cosPhi1 * sinLambda0Lambda1)) : (phi0 + phi1) / 2;
        }
 
        function clipAntimeridianInterpolate(from, to, direction, stream) {
            stream.point(-pi, -phi);
            stream.point(-pi, 0);
            stream.point(-pi, phi);
-         } else if (abs$2(from[0] - to[0]) > epsilon) {
+         } else if (abs$2(from[0] - to[0]) > epsilon$1) {
            var lambda = from[0] < to[0] ? pi : -pi;
            phi = direction * lambda / 2;
            stream.point(-lambda, phi);
          var cr = cos(radius),
              delta = 6 * radians,
              smallRadius = cr > 0,
-             notHemisphere = abs$2(cr) > epsilon; // TODO optimise for this common case
+             notHemisphere = abs$2(cr) > epsilon$1; // TODO optimise for this common case
 
          function interpolate(from, to, direction, stream) {
            circleStream(stream, radius, delta, direction, from, to);
                uu = cartesianDot(u, u),
                t2 = w * w - uu * (cartesianDot(A, A) - 1);
            if (t2 < 0) return;
-           var t = sqrt$1(t2),
+           var t = sqrt(t2),
                q = cartesianScale(u, (-w - t) / uu);
            cartesianAddInPlace(q, A);
            q = spherical(q);
                z;
            if (lambda1 < lambda0) z = lambda0, lambda0 = lambda1, lambda1 = z;
            var delta = lambda1 - lambda0,
-               polar = abs$2(delta - pi) < epsilon,
-               meridian = polar || delta < epsilon;
+               polar = abs$2(delta - pi) < epsilon$1,
+               meridian = polar || delta < epsilon$1;
            if (!polar && phi1 < phi0) z = phi0, phi0 = phi1, phi1 = z; // Check that the first point is between a and b.
 
-           if (meridian ? polar ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon ? phi0 : phi1) : phi0 <= q[1] && q[1] <= phi1 : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
+           if (meridian ? polar ? phi0 + phi1 > 0 ^ q[1] < (abs$2(q[0] - lambda0) < epsilon$1 ? phi0 : phi1) : phi0 <= q[1] && q[1] <= phi1 : delta > pi ^ (lambda0 <= q[0] && q[0] <= lambda1)) {
              var q1 = cartesianScale(u, (-w + t) / uu);
              cartesianAddInPlace(q1, A);
              return [q, spherical(q1)];
          }
 
          function corner(p, direction) {
-           return abs$2(p[0] - x0) < epsilon ? direction > 0 ? 0 : 3 : abs$2(p[0] - x1) < epsilon ? direction > 0 ? 2 : 1 : abs$2(p[1] - y0) < epsilon ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
+           return abs$2(p[0] - x0) < epsilon$1 ? direction > 0 ? 0 : 3 : abs$2(p[0] - x1) < epsilon$1 ? direction > 0 ? 2 : 1 : abs$2(p[1] - y0) < epsilon$1 ? direction > 0 ? 1 : 0 : direction > 0 ? 3 : 2; // abs(p[1] - y1) < epsilon
          }
 
          function compareIntersection(a, b) {
            function polygonEnd() {
              var startInside = polygonInside(),
                  cleanInside = clean && startInside,
-                 visible = (segments = merge(segments)).length;
+                 visible = (segments = merge$4(segments)).length;
 
              if (cleanInside || visible) {
                stream.polygonStart();
          };
        }
 
-       var lengthSum, lambda0$2, sinPhi0$1, cosPhi0$1;
-       var lengthStream = {
-         sphere: noop,
-         point: noop,
+       var lengthSum$1, lambda0, sinPhi0, cosPhi0;
+       var lengthStream$1 = {
+         sphere: noop$1,
+         point: noop$1,
          lineStart: lengthLineStart,
-         lineEnd: noop,
-         polygonStart: noop,
-         polygonEnd: noop
+         lineEnd: noop$1,
+         polygonStart: noop$1,
+         polygonEnd: noop$1
        };
 
        function lengthLineStart() {
-         lengthStream.point = lengthPointFirst;
-         lengthStream.lineEnd = lengthLineEnd;
+         lengthStream$1.point = lengthPointFirst$1;
+         lengthStream$1.lineEnd = lengthLineEnd;
        }
 
        function lengthLineEnd() {
-         lengthStream.point = lengthStream.lineEnd = noop;
+         lengthStream$1.point = lengthStream$1.lineEnd = noop$1;
        }
 
-       function lengthPointFirst(lambda, phi) {
+       function lengthPointFirst$1(lambda, phi) {
          lambda *= radians, phi *= radians;
-         lambda0$2 = lambda, sinPhi0$1 = sin(phi), cosPhi0$1 = cos(phi);
-         lengthStream.point = lengthPoint;
+         lambda0 = lambda, sinPhi0 = sin(phi), cosPhi0 = cos(phi);
+         lengthStream$1.point = lengthPoint$1;
        }
 
-       function lengthPoint(lambda, phi) {
+       function lengthPoint$1(lambda, phi) {
          lambda *= radians, phi *= radians;
          var sinPhi = sin(phi),
              cosPhi = cos(phi),
-             delta = abs$2(lambda - lambda0$2),
+             delta = abs$2(lambda - lambda0),
              cosDelta = cos(delta),
              sinDelta = sin(delta),
              x = cosPhi * sinDelta,
-             y = cosPhi0$1 * sinPhi - sinPhi0$1 * cosPhi * cosDelta,
-             z = sinPhi0$1 * sinPhi + cosPhi0$1 * cosPhi * cosDelta;
-         lengthSum.add(atan2(sqrt$1(x * x + y * y), z));
-         lambda0$2 = lambda, sinPhi0$1 = sinPhi, cosPhi0$1 = cosPhi;
+             y = cosPhi0 * sinPhi - sinPhi0 * cosPhi * cosDelta,
+             z = sinPhi0 * sinPhi + cosPhi0 * cosPhi * cosDelta;
+         lengthSum$1.add(atan2(sqrt(x * x + y * y), z));
+         lambda0 = lambda, sinPhi0 = sinPhi, cosPhi0 = cosPhi;
        }
 
        function d3_geoLength (object) {
-         lengthSum = new Adder();
-         d3_geoStream(object, lengthStream);
-         return +lengthSum;
+         lengthSum$1 = new Adder();
+         d3_geoStream(object, lengthStream$1);
+         return +lengthSum$1;
        }
 
-       var identity = (function (x) {
+       var identity$4 = (function (x) {
          return x;
        });
 
-       var areaSum$1 = new Adder(),
-           areaRingSum$1 = new Adder(),
-           x00,
-           y00,
-           x0$1,
-           y0$1;
-       var areaStream$1 = {
-         point: noop,
-         lineStart: noop,
-         lineEnd: noop,
+       var areaSum = new Adder(),
+           areaRingSum = new Adder(),
+           x00$2,
+           y00$2,
+           x0$3,
+           y0$3;
+       var areaStream = {
+         point: noop$1,
+         lineStart: noop$1,
+         lineEnd: noop$1,
          polygonStart: function polygonStart() {
-           areaStream$1.lineStart = areaRingStart$1;
-           areaStream$1.lineEnd = areaRingEnd$1;
+           areaStream.lineStart = areaRingStart;
+           areaStream.lineEnd = areaRingEnd;
          },
          polygonEnd: function polygonEnd() {
-           areaStream$1.lineStart = areaStream$1.lineEnd = areaStream$1.point = noop;
-           areaSum$1.add(abs$2(areaRingSum$1));
-           areaRingSum$1 = new Adder();
+           areaStream.lineStart = areaStream.lineEnd = areaStream.point = noop$1;
+           areaSum.add(abs$2(areaRingSum));
+           areaRingSum = new Adder();
          },
          result: function result() {
-           var area = areaSum$1 / 2;
-           areaSum$1 = new Adder();
+           var area = areaSum / 2;
+           areaSum = new Adder();
            return area;
          }
        };
 
-       function areaRingStart$1() {
-         areaStream$1.point = areaPointFirst$1;
+       function areaRingStart() {
+         areaStream.point = areaPointFirst;
        }
 
-       function areaPointFirst$1(x, y) {
-         areaStream$1.point = areaPoint$1;
-         x00 = x0$1 = x, y00 = y0$1 = y;
+       function areaPointFirst(x, y) {
+         areaStream.point = areaPoint;
+         x00$2 = x0$3 = x, y00$2 = y0$3 = y;
        }
 
-       function areaPoint$1(x, y) {
-         areaRingSum$1.add(y0$1 * x - x0$1 * y);
-         x0$1 = x, y0$1 = y;
+       function areaPoint(x, y) {
+         areaRingSum.add(y0$3 * x - x0$3 * y);
+         x0$3 = x, y0$3 = y;
        }
 
-       function areaRingEnd$1() {
-         areaPoint$1(x00, y00);
+       function areaRingEnd() {
+         areaPoint(x00$2, y00$2);
        }
 
        var x0$2 = Infinity,
            y0$2 = x0$2,
            x1 = -x0$2,
            y1 = x1;
-       var boundsStream$1 = {
-         point: boundsPoint$1,
-         lineStart: noop,
-         lineEnd: noop,
-         polygonStart: noop,
-         polygonEnd: noop,
+       var boundsStream = {
+         point: boundsPoint,
+         lineStart: noop$1,
+         lineEnd: noop$1,
+         polygonStart: noop$1,
+         polygonEnd: noop$1,
          result: function result() {
            var bounds = [[x0$2, y0$2], [x1, y1]];
            x1 = y1 = -(y0$2 = x0$2 = Infinity);
          }
        };
 
-       function boundsPoint$1(x, y) {
+       function boundsPoint(x, y) {
          if (x < x0$2) x0$2 = x;
          if (x > x1) x1 = x;
          if (y < y0$2) y0$2 = y;
          if (y > y1) y1 = y;
        }
 
-       var X0$1 = 0,
-           Y0$1 = 0,
-           Z0$1 = 0,
-           X1$1 = 0,
-           Y1$1 = 0,
-           Z1$1 = 0,
-           X2$1 = 0,
-           Y2$1 = 0,
-           Z2$1 = 0,
+       var X0 = 0,
+           Y0 = 0,
+           Z0 = 0,
+           X1 = 0,
+           Y1 = 0,
+           Z1 = 0,
+           X2 = 0,
+           Y2 = 0,
+           Z2 = 0,
            x00$1,
            y00$1,
-           x0$3,
-           y0$3;
-       var centroidStream$1 = {
-         point: centroidPoint$1,
-         lineStart: centroidLineStart$1,
-         lineEnd: centroidLineEnd$1,
+           x0$1,
+           y0$1;
+       var centroidStream = {
+         point: centroidPoint,
+         lineStart: centroidLineStart,
+         lineEnd: centroidLineEnd,
          polygonStart: function polygonStart() {
-           centroidStream$1.lineStart = centroidRingStart$1;
-           centroidStream$1.lineEnd = centroidRingEnd$1;
+           centroidStream.lineStart = centroidRingStart;
+           centroidStream.lineEnd = centroidRingEnd;
          },
          polygonEnd: function polygonEnd() {
-           centroidStream$1.point = centroidPoint$1;
-           centroidStream$1.lineStart = centroidLineStart$1;
-           centroidStream$1.lineEnd = centroidLineEnd$1;
+           centroidStream.point = centroidPoint;
+           centroidStream.lineStart = centroidLineStart;
+           centroidStream.lineEnd = centroidLineEnd;
          },
          result: function result() {
-           var centroid = Z2$1 ? [X2$1 / Z2$1, Y2$1 / Z2$1] : Z1$1 ? [X1$1 / Z1$1, Y1$1 / Z1$1] : Z0$1 ? [X0$1 / Z0$1, Y0$1 / Z0$1] : [NaN, NaN];
-           X0$1 = Y0$1 = Z0$1 = X1$1 = Y1$1 = Z1$1 = X2$1 = Y2$1 = Z2$1 = 0;
+           var centroid = Z2 ? [X2 / Z2, Y2 / Z2] : Z1 ? [X1 / Z1, Y1 / Z1] : Z0 ? [X0 / Z0, Y0 / Z0] : [NaN, NaN];
+           X0 = Y0 = Z0 = X1 = Y1 = Z1 = X2 = Y2 = Z2 = 0;
            return centroid;
          }
        };
 
-       function centroidPoint$1(x, y) {
-         X0$1 += x;
-         Y0$1 += y;
-         ++Z0$1;
+       function centroidPoint(x, y) {
+         X0 += x;
+         Y0 += y;
+         ++Z0;
        }
 
-       function centroidLineStart$1() {
-         centroidStream$1.point = centroidPointFirstLine;
+       function centroidLineStart() {
+         centroidStream.point = centroidPointFirstLine;
        }
 
        function centroidPointFirstLine(x, y) {
-         centroidStream$1.point = centroidPointLine;
-         centroidPoint$1(x0$3 = x, y0$3 = y);
+         centroidStream.point = centroidPointLine;
+         centroidPoint(x0$1 = x, y0$1 = y);
        }
 
        function centroidPointLine(x, y) {
-         var dx = x - x0$3,
-             dy = y - y0$3,
-             z = sqrt$1(dx * dx + dy * dy);
-         X1$1 += z * (x0$3 + x) / 2;
-         Y1$1 += z * (y0$3 + y) / 2;
-         Z1$1 += z;
-         centroidPoint$1(x0$3 = x, y0$3 = y);
+         var dx = x - x0$1,
+             dy = y - y0$1,
+             z = sqrt(dx * dx + dy * dy);
+         X1 += z * (x0$1 + x) / 2;
+         Y1 += z * (y0$1 + y) / 2;
+         Z1 += z;
+         centroidPoint(x0$1 = x, y0$1 = y);
        }
 
-       function centroidLineEnd$1() {
-         centroidStream$1.point = centroidPoint$1;
+       function centroidLineEnd() {
+         centroidStream.point = centroidPoint;
        }
 
-       function centroidRingStart$1() {
-         centroidStream$1.point = centroidPointFirstRing;
+       function centroidRingStart() {
+         centroidStream.point = centroidPointFirstRing;
        }
 
-       function centroidRingEnd$1() {
+       function centroidRingEnd() {
          centroidPointRing(x00$1, y00$1);
        }
 
        function centroidPointFirstRing(x, y) {
-         centroidStream$1.point = centroidPointRing;
-         centroidPoint$1(x00$1 = x0$3 = x, y00$1 = y0$3 = y);
+         centroidStream.point = centroidPointRing;
+         centroidPoint(x00$1 = x0$1 = x, y00$1 = y0$1 = y);
        }
 
        function centroidPointRing(x, y) {
-         var dx = x - x0$3,
-             dy = y - y0$3,
-             z = sqrt$1(dx * dx + dy * dy);
-         X1$1 += z * (x0$3 + x) / 2;
-         Y1$1 += z * (y0$3 + y) / 2;
-         Z1$1 += z;
-         z = y0$3 * x - x0$3 * y;
-         X2$1 += z * (x0$3 + x);
-         Y2$1 += z * (y0$3 + y);
-         Z2$1 += z * 3;
-         centroidPoint$1(x0$3 = x, y0$3 = y);
+         var dx = x - x0$1,
+             dy = y - y0$1,
+             z = sqrt(dx * dx + dy * dy);
+         X1 += z * (x0$1 + x) / 2;
+         Y1 += z * (y0$1 + y) / 2;
+         Z1 += z;
+         z = y0$1 * x - x0$1 * y;
+         X2 += z * (x0$1 + x);
+         Y2 += z * (y0$1 + y);
+         Z2 += z * 3;
+         centroidPoint(x0$1 = x, y0$1 = y);
        }
 
        function PathContext(context) {
                }
            }
          },
-         result: noop
+         result: noop$1
        };
 
-       var lengthSum$1 = new Adder(),
+       var lengthSum = new Adder(),
            lengthRing,
-           x00$2,
-           y00$2,
-           x0$4,
-           y0$4;
-       var lengthStream$1 = {
-         point: noop,
+           x00,
+           y00,
+           x0,
+           y0;
+       var lengthStream = {
+         point: noop$1,
          lineStart: function lineStart() {
-           lengthStream$1.point = lengthPointFirst$1;
+           lengthStream.point = lengthPointFirst;
          },
          lineEnd: function lineEnd() {
-           if (lengthRing) lengthPoint$1(x00$2, y00$2);
-           lengthStream$1.point = noop;
+           if (lengthRing) lengthPoint(x00, y00);
+           lengthStream.point = noop$1;
          },
          polygonStart: function polygonStart() {
            lengthRing = true;
            lengthRing = null;
          },
          result: function result() {
-           var length = +lengthSum$1;
-           lengthSum$1 = new Adder();
+           var length = +lengthSum;
+           lengthSum = new Adder();
            return length;
          }
        };
 
-       function lengthPointFirst$1(x, y) {
-         lengthStream$1.point = lengthPoint$1;
-         x00$2 = x0$4 = x, y00$2 = y0$4 = y;
+       function lengthPointFirst(x, y) {
+         lengthStream.point = lengthPoint;
+         x00 = x0 = x, y00 = y0 = y;
        }
 
-       function lengthPoint$1(x, y) {
-         x0$4 -= x, y0$4 -= y;
-         lengthSum$1.add(sqrt$1(x0$4 * x0$4 + y0$4 * y0$4));
-         x0$4 = x, y0$4 = y;
+       function lengthPoint(x, y) {
+         x0 -= x, y0 -= y;
+         lengthSum.add(sqrt(x0 * x0 + y0 * y0));
+         x0 = x, y0 = y;
        }
 
        function PathString() {
          }
 
          path.area = function (object) {
-           d3_geoStream(object, projectionStream(areaStream$1));
-           return areaStream$1.result();
+           d3_geoStream(object, projectionStream(areaStream));
+           return areaStream.result();
          };
 
          path.measure = function (object) {
-           d3_geoStream(object, projectionStream(lengthStream$1));
-           return lengthStream$1.result();
+           d3_geoStream(object, projectionStream(lengthStream));
+           return lengthStream.result();
          };
 
          path.bounds = function (object) {
-           d3_geoStream(object, projectionStream(boundsStream$1));
-           return boundsStream$1.result();
+           d3_geoStream(object, projectionStream(boundsStream));
+           return boundsStream.result();
          };
 
          path.centroid = function (object) {
-           d3_geoStream(object, projectionStream(centroidStream$1));
-           return centroidStream$1.result();
+           d3_geoStream(object, projectionStream(centroidStream));
+           return centroidStream.result();
          };
 
          path.projection = function (_) {
-           return arguments.length ? (projectionStream = _ == null ? (projection = null, identity) : (projection = _).stream, path) : projection;
+           return arguments.length ? (projectionStream = _ == null ? (projection = null, identity$4) : (projection = _).stream, path) : projection;
          };
 
          path.context = function (_) {
 
        function d3_geoTransform (methods) {
          return {
-           stream: transformer(methods)
+           stream: transformer$1(methods)
          };
        }
-       function transformer(methods) {
+       function transformer$1(methods) {
          return function (stream) {
            var s = new TransformStream();
 
          var clip = projection.clipExtent && projection.clipExtent();
          projection.scale(150).translate([0, 0]);
          if (clip != null) projection.clipExtent(null);
-         d3_geoStream(object, projection.stream(boundsStream$1));
-         fitBounds(boundsStream$1.result());
+         d3_geoStream(object, projection.stream(boundsStream));
+         fitBounds(boundsStream.result());
          if (clip != null) projection.clipExtent(clip);
          return projection;
        }
        }
 
        function resampleNone(project) {
-         return transformer({
+         return transformer$1({
            point: function point(x, y) {
              x = project(x, y);
              this.stream.point(x[0], x[1]);
              var a = a0 + a1,
                  b = b0 + b1,
                  c = c0 + c1,
-                 m = sqrt$1(a * a + b * b + c * c),
+                 m = sqrt(a * a + b * b + c * c),
                  phi2 = asin(c /= m),
-                 lambda2 = abs$2(abs$2(c) - 1) < epsilon || abs$2(lambda0 - lambda1) < epsilon ? (lambda0 + lambda1) / 2 : atan2(b, a),
+                 lambda2 = abs$2(abs$2(c) - 1) < epsilon$1 || abs$2(lambda0 - lambda1) < epsilon$1 ? (lambda0 + lambda1) / 2 : atan2(b, a),
                  p = project(lambda2, phi2),
                  x2 = p[0],
                  y2 = p[1],
          };
        }
 
-       var transformRadians = transformer({
+       var transformRadians = transformer$1({
          point: function point(x, y) {
            this.stream.point(x * radians, y * radians);
          }
        });
 
        function transformRotate(rotate) {
-         return transformer({
+         return transformer$1({
            point: function point(x, y) {
              var r = rotate(x, y);
              return this.stream.point(r[0], r[1]);
              y0,
              x1,
              y1,
-             postclip = identity,
+             postclip = identity$4,
              // post-clip extent
          delta2 = 0.5,
              // precision
 
          function invert(point) {
            point = projectRotateTransform.invert(point[0], point[1]);
-           return point && [point[0] * degrees, point[1] * degrees];
+           return point && [point[0] * degrees$1, point[1] * degrees$1];
          }
 
          projection.stream = function (stream) {
          };
 
          projection.clipAngle = function (_) {
-           return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees;
+           return arguments.length ? (preclip = +_ ? clipCircle(theta = _ * radians) : (theta = null, clipAntimeridian), reset()) : theta * degrees$1;
          };
 
          projection.clipExtent = function (_) {
-           return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+           return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
          };
 
          projection.scale = function (_) {
          };
 
          projection.center = function (_) {
-           return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees, phi * degrees];
+           return arguments.length ? (lambda = _[0] % 360 * radians, phi = _[1] % 360 * radians, recenter()) : [lambda * degrees$1, phi * degrees$1];
          };
 
          projection.rotate = function (_) {
-           return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees, deltaPhi * degrees, deltaGamma * degrees];
+           return arguments.length ? (deltaLambda = _[0] % 360 * radians, deltaPhi = _[1] % 360 * radians, deltaGamma = _.length > 2 ? _[2] % 360 * radians : 0, recenter()) : [deltaLambda * degrees$1, deltaPhi * degrees$1, deltaGamma * degrees$1];
          };
 
          projection.angle = function (_) {
-           return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees;
+           return arguments.length ? (alpha = _ % 360 * radians, recenter()) : alpha * degrees$1;
          };
 
          projection.reflectX = function (_) {
          };
 
          projection.precision = function (_) {
-           return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt$1(delta2);
+           return arguments.length ? (projectResample = resample(projectTransform, delta2 = _ * _), reset()) : sqrt(delta2);
          };
 
          projection.fitExtent = function (extent, object) {
        }
 
        mercatorRaw.invert = function (x, y) {
-         return [x, 2 * atan(exp(y)) - halfPi];
+         return [x, 2 * atan(exp$2(y)) - halfPi];
        };
 
        function mercator () {
              // clip extent
          kx = 1,
              ky = 1,
-             transform = transformer({
+             transform = transformer$1({
            point: function point(x, y) {
              var p = projection([x, y]);
              this.stream.point(p[0], p[1]);
            }
          }),
-             postclip = identity,
+             postclip = identity$4,
              cache,
              cacheStream;
 
          };
 
          projection.clipExtent = function (_) {
-           return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
+           return arguments.length ? (postclip = _ == null ? (x0 = y0 = x1 = y1 = null, identity$4) : clipRectangle(x0 = +_[0][0], y0 = +_[0][1], x1 = +_[1][0], y1 = +_[1][1]), reset()) : x0 == null ? null : [[x0, y0], [x1, y1]];
          };
 
          projection.scale = function (_) {
          };
 
          projection.angle = function (_) {
-           return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees;
+           return arguments.length ? (alpha = _ % 360 * radians, sa = sin(alpha), ca = cos(alpha), reset()) : alpha * degrees$1;
          };
 
          projection.reflectX = function (_) {
          }
        });
 
-       var $every$1 = arrayIteration.every;
-
-
+       var $$w = _export;
+       var $every = arrayIteration.every;
+       var arrayMethodIsStrict$2 = arrayMethodIsStrict$9;
 
-       var STRICT_METHOD$6 = arrayMethodIsStrict('every');
-       var USES_TO_LENGTH$8 = arrayMethodUsesToLength('every');
+       var STRICT_METHOD$2 = arrayMethodIsStrict$2('every');
 
        // `Array.prototype.every` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.every
-       _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$6 || !USES_TO_LENGTH$8 }, {
+       // https://tc39.es/ecma262/#sec-array.prototype.every
+       $$w({ target: 'Array', proto: true, forced: !STRICT_METHOD$2 }, {
          every: function every(callbackfn /* , thisArg */) {
-           return $every$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return $every(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
-       var $reduce$1 = arrayReduce.left;
-
-
+       var $$v = _export;
+       var $reduce = arrayReduce.left;
+       var arrayMethodIsStrict$1 = arrayMethodIsStrict$9;
+       var CHROME_VERSION$1 = engineV8Version;
+       var IS_NODE$1 = engineIsNode;
 
-       var STRICT_METHOD$7 = arrayMethodIsStrict('reduce');
-       var USES_TO_LENGTH$9 = arrayMethodUsesToLength('reduce', { 1: 0 });
+       var STRICT_METHOD$1 = arrayMethodIsStrict$1('reduce');
+       // Chrome 80-82 has a critical bug
+       // https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
+       var CHROME_BUG$1 = !IS_NODE$1 && CHROME_VERSION$1 > 79 && CHROME_VERSION$1 < 83;
 
        // `Array.prototype.reduce` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.reduce
-       _export({ target: 'Array', proto: true, forced: !STRICT_METHOD$7 || !USES_TO_LENGTH$9 }, {
+       // https://tc39.es/ecma262/#sec-array.prototype.reduce
+       $$v({ target: 'Array', proto: true, forced: !STRICT_METHOD$1 || CHROME_BUG$1 }, {
          reduce: function reduce(callbackfn /* , initialValue */) {
-           return $reduce$1(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+           var length = arguments.length;
+           return $reduce(this, callbackfn, length, length > 1 ? arguments[1] : undefined);
          }
        });
 
 
          var x = 0;
          var y = 0;
-         if (point[0] > dimensions[0] - pad[1]) x = -10;
-         if (point[0] < pad[3]) x = 10;
-         if (point[1] > dimensions[1] - pad[2]) y = -10;
-         if (point[1] < pad[0]) y = 10;
+
+         if (point[0] > dimensions[0] - pad[1]) {
+           x = -10;
+         }
+
+         if (point[0] < pad[3]) {
+           x = 10;
+         }
+
+         if (point[1] > dimensions[1] - pad[2]) {
+           y = -10;
+         }
+
+         if (point[1] < pad[0]) {
+           y = 10;
+         }
 
          if (x || y) {
            return [x, y];
          }
        }
 
-       var noop$1 = {
+       var noop = {
          value: function value() {}
        };
 
-       function dispatch() {
+       function dispatch$8() {
          for (var i = 0, n = arguments.length, _ = {}, t; i < n; ++i) {
            if (!(t = arguments[i] + "") || t in _ || /[\s.]/.test(t)) throw new Error("illegal type: " + t);
            _[t] = [];
          }
 
-         return new Dispatch$1(_);
+         return new Dispatch(_);
        }
 
-       function Dispatch$1(_) {
+       function Dispatch(_) {
          this._ = _;
        }
 
-       function parseTypenames(typenames, types) {
+       function parseTypenames$1(typenames, types) {
          return typenames.trim().split(/^|\s+/).map(function (t) {
            var name = "",
                i = t.indexOf(".");
          });
        }
 
-       Dispatch$1.prototype = dispatch.prototype = {
-         constructor: Dispatch$1,
+       Dispatch.prototype = dispatch$8.prototype = {
+         constructor: Dispatch,
          on: function on(typename, callback) {
            var _ = this._,
-               T = parseTypenames(typename + "", _),
+               T = parseTypenames$1(typename + "", _),
                t,
                i = -1,
                n = T.length; // If no callback was specified, return the callback of the given type and name.
 
            if (arguments.length < 2) {
              while (++i < n) {
-               if ((t = (typename = T[i]).type) && (t = get$3(_[t], typename.name))) return t;
+               if ((t = (typename = T[i]).type) && (t = get$2(_[t], typename.name))) return t;
              }
 
              return;
            if (callback != null && typeof callback !== "function") throw new Error("invalid callback: " + callback);
 
            while (++i < n) {
-             if (t = (typename = T[i]).type) _[t] = set$3(_[t], typename.name, callback);else if (callback == null) for (t in _) {
-               _[t] = set$3(_[t], typename.name, null);
+             if (t = (typename = T[i]).type) _[t] = set$1(_[t], typename.name, callback);else if (callback == null) for (t in _) {
+               _[t] = set$1(_[t], typename.name, null);
              }
            }
 
              copy[t] = _[t].slice();
            }
 
-           return new Dispatch$1(copy);
+           return new Dispatch(copy);
          },
          call: function call(type, that) {
            if ((n = arguments.length - 2) > 0) for (var args = new Array(n), i = 0, n, t; i < n; ++i) {
          }
        };
 
-       function get$3(type, name) {
+       function get$2(type, name) {
          for (var i = 0, n = type.length, c; i < n; ++i) {
            if ((c = type[i]).name === name) {
              return c.value;
          }
        }
 
-       function set$3(type, name, callback) {
+       function set$1(type, name, callback) {
          for (var i = 0, n = type.length; i < n; ++i) {
            if (type[i].name === name) {
-             type[i] = noop$1, type = type.slice(0, i).concat(type.slice(i + 1));
+             type[i] = noop, type = type.slice(0, i).concat(type.slice(i + 1));
              break;
            }
          }
            }
          }
 
-         return new Selection(subgroups, this._parents);
+         return new Selection$1(subgroups, this._parents);
        }
 
        function array (x) {
            }
          }
 
-         return new Selection(subgroups, parents);
+         return new Selection$1(subgroups, parents);
        }
 
-       var $find$1 = arrayIteration.find;
-
-
+       var $$u = _export;
+       var $find = arrayIteration.find;
+       var addToUnscopables$3 = addToUnscopables$6;
 
        var FIND = 'find';
-       var SKIPS_HOLES = true;
-
-       var USES_TO_LENGTH$a = arrayMethodUsesToLength(FIND);
+       var SKIPS_HOLES$1 = true;
 
        // Shouldn't skip holes
-       if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES = false; });
+       if (FIND in []) Array(1)[FIND](function () { SKIPS_HOLES$1 = false; });
 
        // `Array.prototype.find` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.find
-       _export({ target: 'Array', proto: true, forced: SKIPS_HOLES || !USES_TO_LENGTH$a }, {
+       // https://tc39.es/ecma262/#sec-array.prototype.find
+       $$u({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 }, {
          find: function find(callbackfn /* , that = undefined */) {
-           return $find$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return $find(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
          }
        });
 
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables(FIND);
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables$3(FIND);
 
        function matcher (selector) {
          return function () {
          };
        }
 
-       var find$1 = Array.prototype.find;
+       var find = Array.prototype.find;
 
        function childFind(match) {
          return function () {
-           return find$1.call(this.children, match);
+           return find.call(this.children, match);
          };
        }
 
            }
          }
 
-         return new Selection(subgroups, this._parents);
+         return new Selection$1(subgroups, this._parents);
        }
 
        function sparse (update) {
        }
 
        function selection_enter () {
-         return new Selection(this._enter || this._groups.map(sparse), this._parents);
+         return new Selection$1(this._enter || this._groups.map(sparse), this._parents);
        }
        function EnterNode(parent, datum) {
          this.ownerDocument = parent.ownerDocument;
          }
        };
 
-       function constant (x) {
+       function constant$3 (x) {
          return function () {
            return x;
          };
          var bind = key ? bindKey : bindIndex,
              parents = this._parents,
              groups = this._groups;
-         if (typeof value !== "function") value = constant(value);
+         if (typeof value !== "function") value = constant$3(value);
 
          for (var m = groups.length, update = new Array(m), enter = new Array(m), exit = new Array(m), j = 0; j < m; ++j) {
            var parent = parents[j],
            }
          }
 
-         update = new Selection(update, parents);
+         update = new Selection$1(update, parents);
          update._enter = enter;
          update._exit = exit;
          return update;
        }
 
        function selection_exit () {
-         return new Selection(this._exit || this._groups.map(sparse), this._parents);
+         return new Selection$1(this._exit || this._groups.map(sparse), this._parents);
        }
 
        function selection_join (onenter, onupdate, onexit) {
        }
 
        function selection_merge (selection) {
-         if (!(selection instanceof Selection)) throw new Error("invalid merge");
+         if (!(selection instanceof Selection$1)) throw new Error("invalid merge");
 
          for (var groups0 = this._groups, groups1 = selection._groups, m0 = groups0.length, m1 = groups1.length, m = Math.min(m0, m1), merges = new Array(m0), j = 0; j < m; ++j) {
            for (var group0 = groups0[j], group1 = groups1[j], n = group0.length, merge = merges[j] = new Array(n), node, i = 0; i < n; ++i) {
            merges[j] = groups0[j];
          }
 
-         return new Selection(merges, this._parents);
+         return new Selection$1(merges, this._parents);
        }
 
        function selection_order () {
            sortgroup.sort(compareNode);
          }
 
-         return new Selection(sortgroups, this._parents).order();
+         return new Selection$1(sortgroups, this._parents).order();
        }
 
        function ascending(a, b) {
          return this;
        }
 
-       function attrRemove(name) {
+       function attrRemove$1(name) {
          return function () {
            this.removeAttribute(name);
          };
        }
 
-       function attrRemoveNS(fullname) {
+       function attrRemoveNS$1(fullname) {
          return function () {
            this.removeAttributeNS(fullname.space, fullname.local);
          };
        }
 
-       function attrConstant(name, value) {
+       function attrConstant$1(name, value) {
          return function () {
            this.setAttribute(name, value);
          };
        }
 
-       function attrConstantNS(fullname, value) {
+       function attrConstantNS$1(fullname, value) {
          return function () {
            this.setAttributeNS(fullname.space, fullname.local, value);
          };
        }
 
-       function attrFunction(name, value) {
+       function attrFunction$1(name, value) {
          return function () {
            var v = value.apply(this, arguments);
            if (v == null) this.removeAttribute(name);else this.setAttribute(name, v);
          };
        }
 
-       function attrFunctionNS(fullname, value) {
+       function attrFunctionNS$1(fullname, value) {
          return function () {
            var v = value.apply(this, arguments);
            if (v == null) this.removeAttributeNS(fullname.space, fullname.local);else this.setAttributeNS(fullname.space, fullname.local, v);
            return fullname.local ? node.getAttributeNS(fullname.space, fullname.local) : node.getAttribute(fullname);
          }
 
-         return this.each((value == null ? fullname.local ? attrRemoveNS : attrRemove : typeof value === "function" ? fullname.local ? attrFunctionNS : attrFunction : fullname.local ? attrConstantNS : attrConstant)(fullname, value));
+         return this.each((value == null ? fullname.local ? attrRemoveNS$1 : attrRemove$1 : typeof value === "function" ? fullname.local ? attrFunctionNS$1 : attrFunction$1 : fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, value));
        }
 
        function defaultView (node) {
-         return node.ownerDocument && node.ownerDocument.defaultView || // node is a Node
-         node.document && node // node is a Window
+         return node.ownerDocument && node.ownerDocument.defaultView // node is a Node
+         || node.document && node // node is a Window
          || node.defaultView; // node is a Document
        }
 
-       function styleRemove(name) {
+       function styleRemove$1(name) {
          return function () {
            this.style.removeProperty(name);
          };
        }
 
-       function styleConstant(name, value, priority) {
+       function styleConstant$1(name, value, priority) {
          return function () {
            this.style.setProperty(name, value, priority);
          };
        }
 
-       function styleFunction(name, value, priority) {
+       function styleFunction$1(name, value, priority) {
          return function () {
            var v = value.apply(this, arguments);
            if (v == null) this.style.removeProperty(name);else this.style.setProperty(name, v, priority);
        }
 
        function selection_style (name, value, priority) {
-         return arguments.length > 1 ? this.each((value == null ? styleRemove : typeof value === "function" ? styleFunction : styleConstant)(name, value, priority == null ? "" : priority)) : styleValue(this.node(), name);
+         return arguments.length > 1 ? this.each((value == null ? styleRemove$1 : typeof value === "function" ? styleFunction$1 : styleConstant$1)(name, value, priority == null ? "" : priority)) : styleValue(this.node(), name);
        }
        function styleValue(node, name) {
          return node.style.getPropertyValue(name) || defaultView(node).getComputedStyle(node, null).getPropertyValue(name);
          this.textContent = "";
        }
 
-       function textConstant(value) {
+       function textConstant$1(value) {
          return function () {
            this.textContent = value;
          };
        }
 
-       function textFunction(value) {
+       function textFunction$1(value) {
          return function () {
            var v = value.apply(this, arguments);
            this.textContent = v == null ? "" : v;
        }
 
        function selection_text (value) {
-         return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction : textConstant)(value)) : this.node().textContent;
+         return arguments.length ? this.each(value == null ? textRemove : (typeof value === "function" ? textFunction$1 : textConstant$1)(value)) : this.node().textContent;
        }
 
        function htmlRemove() {
          });
        }
 
-       function remove() {
+       function remove$7() {
          var parent = this.parentNode;
          if (parent) parent.removeChild(this);
        }
 
        function selection_remove () {
-         return this.each(remove);
+         return this.each(remove$7);
        }
 
        function selection_cloneShallow() {
          };
        }
 
-       function parseTypenames$1(typenames) {
+       function parseTypenames(typenames) {
          return typenames.trim().split(/^|\s+/).map(function (t) {
            var name = "",
                i = t.indexOf(".");
        }
 
        function selection_on (typename, value, options) {
-         var typenames = parseTypenames$1(typename + ""),
+         var typenames = parseTypenames(typename + ""),
              i,
              n = typenames.length,
              t;
          return this;
        }
 
-       function dispatchEvent$1(node, type, params) {
+       function dispatchEvent(node, type, params) {
          var window = defaultView(node),
              event = window.CustomEvent;
 
 
        function dispatchConstant(type, params) {
          return function () {
-           return dispatchEvent$1(this, type, params);
+           return dispatchEvent(this, type, params);
          };
        }
 
        function dispatchFunction(type, params) {
          return function () {
-           return dispatchEvent$1(this, type, params.apply(this, arguments));
+           return dispatchEvent(this, type, params.apply(this, arguments));
          };
        }
 
          return this.each((typeof params === "function" ? dispatchFunction : dispatchConstant)(type, params));
        }
 
-       var _marked$2 = /*#__PURE__*/regeneratorRuntime.mark(_callee);
+       var _marked$1 = /*#__PURE__*/regeneratorRuntime.mark(_callee);
 
        function _callee() {
          var groups, j, m, group, i, n, node;
                  return _context.stop();
              }
            }
-         }, _marked$2, this);
+         }, _marked$1, this);
        }
 
-       var root = [null];
-       function Selection(groups, parents) {
+       var root$1 = [null];
+       function Selection$1(groups, parents) {
          this._groups = groups;
          this._parents = parents;
        }
 
        function selection() {
-         return new Selection([[document.documentElement]], root);
+         return new Selection$1([[document.documentElement]], root$1);
        }
 
        function selection_selection() {
          return this;
        }
 
-       Selection.prototype = selection.prototype = _defineProperty({
-         constructor: Selection,
+       Selection$1.prototype = selection.prototype = _defineProperty({
+         constructor: Selection$1,
          select: selection_select,
          selectAll: selection_selectAll,
          selectChild: selection_selectChild,
        }, Symbol.iterator, _callee);
 
        function select (selector) {
-         return typeof selector === "string" ? new Selection([[document.querySelector(selector)]], [document.documentElement]) : new Selection([[selector]], root);
+         return typeof selector === "string" ? new Selection$1([[document.querySelector(selector)]], [document.documentElement]) : new Selection$1([[selector]], root$1);
        }
 
        function sourceEvent (event) {
        }
 
        function selectAll (selector) {
-         return typeof selector === "string" ? new Selection([document.querySelectorAll(selector)], [document.documentElement]) : new Selection([selector == null ? [] : array(selector)], root);
+         return typeof selector === "string" ? new Selection$1([document.querySelectorAll(selector)], [document.documentElement]) : new Selection$1([selector == null ? [] : array(selector)], root$1);
        }
 
-       function nopropagation(event) {
+       function nopropagation$1(event) {
          event.stopImmediatePropagation();
        }
-       function noevent (event) {
+       function noevent$1 (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }
 
        function dragDisable (view) {
          var root = view.document.documentElement,
-             selection = select(view).on("dragstart.drag", noevent, true);
+             selection = select(view).on("dragstart.drag", noevent$1, true);
 
          if ("onselectstart" in root) {
-           selection.on("selectstart.drag", noevent, true);
+           selection.on("selectstart.drag", noevent$1, true);
          } else {
            root.__noselect = root.style.MozUserSelect;
            root.style.MozUserSelect = "none";
              selection = select(view).on("dragstart.drag", null);
 
          if (noclick) {
-           selection.on("click.drag", noevent, true);
+           selection.on("click.drag", noevent$1, true);
            setTimeout(function () {
              selection.on("click.drag", null);
            }, 0);
          }
        }
 
-       var constant$1 = (function (x) {
+       var constant$2 = (function (x) {
          return function () {
            return x;
          };
        });
 
-       // `Object.defineProperties` method
-       // https://tc39.github.io/ecma262/#sec-object.defineproperties
-       _export({ target: 'Object', stat: true, forced: !descriptors, sham: !descriptors }, {
-         defineProperties: objectDefineProperties
-       });
-
        function DragEvent(type, _ref) {
          var sourceEvent = _ref.sourceEvent,
              subject = _ref.subject,
          return value === this._ ? this : value;
        };
 
-       function defaultFilter(event) {
+       function defaultFilter$2(event) {
          return !event.ctrlKey && !event.button;
        }
 
          } : d;
        }
 
-       function defaultTouchable() {
+       function defaultTouchable$1() {
          return navigator.maxTouchPoints || "ontouchstart" in this;
        }
 
        function d3_drag () {
-         var filter = defaultFilter,
+         var filter = defaultFilter$2,
              container = defaultContainer,
              subject = defaultSubject,
-             touchable = defaultTouchable,
+             touchable = defaultTouchable$1,
              gestures = {},
-             listeners = dispatch("start", "drag", "end"),
+             listeners = dispatch$8("start", "drag", "end"),
              active = 0,
              mousedownx,
              mousedowny,
            if (!gesture) return;
            select(event.view).on("mousemove.drag", mousemoved, true).on("mouseup.drag", mouseupped, true);
            dragDisable(event.view);
-           nopropagation(event);
+           nopropagation$1(event);
            mousemoving = false;
            mousedownx = event.clientX;
            mousedowny = event.clientY;
          }
 
          function mousemoved(event) {
-           noevent(event);
+           noevent$1(event);
 
            if (!mousemoving) {
              var dx = event.clientX - mousedownx,
          function mouseupped(event) {
            select(event.view).on("mousemove.drag mouseup.drag", null);
            yesdrag(event.view, mousemoving);
-           noevent(event);
+           noevent$1(event);
            gestures.mouse("end", event);
          }
 
 
            for (i = 0; i < n; ++i) {
              if (gesture = beforestart(this, c, event, d, touches[i].identifier, touches[i])) {
-               nopropagation(event);
+               nopropagation$1(event);
                gesture("start", event, touches[i]);
              }
            }
 
            for (i = 0; i < n; ++i) {
              if (gesture = gestures[touches[i].identifier]) {
-               noevent(event);
+               noevent$1(event);
                gesture("drag", event, touches[i]);
              }
            }
 
            for (i = 0; i < n; ++i) {
              if (gesture = gestures[touches[i].identifier]) {
-               nopropagation(event);
+               nopropagation$1(event);
                gesture("end", event, touches[i]);
              }
            }
          }
 
          drag.filter = function (_) {
-           return arguments.length ? (filter = typeof _ === "function" ? _ : constant$1(!!_), drag) : filter;
+           return arguments.length ? (filter = typeof _ === "function" ? _ : constant$2(!!_), drag) : filter;
          };
 
          drag.container = function (_) {
-           return arguments.length ? (container = typeof _ === "function" ? _ : constant$1(_), drag) : container;
+           return arguments.length ? (container = typeof _ === "function" ? _ : constant$2(_), drag) : container;
          };
 
          drag.subject = function (_) {
-           return arguments.length ? (subject = typeof _ === "function" ? _ : constant$1(_), drag) : subject;
+           return arguments.length ? (subject = typeof _ === "function" ? _ : constant$2(_), drag) : subject;
          };
 
          drag.touchable = function (_) {
-           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$1(!!_), drag) : touchable;
+           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$2(!!_), drag) : touchable;
          };
 
          drag.on = function () {
          return drag;
        }
 
-       var defineProperty$9 = objectDefineProperty.f;
+       var DESCRIPTORS$4 = descriptors;
+       var global$b = global$1m;
+       var uncurryThis$e = functionUncurryThis;
+       var isForced$1 = isForced_1;
+       var inheritIfRequired$1 = inheritIfRequired$4;
+       var createNonEnumerableProperty = createNonEnumerableProperty$b;
+       var defineProperty$1 = objectDefineProperty.f;
        var getOwnPropertyNames$1 = objectGetOwnPropertyNames.f;
+       var isPrototypeOf$1 = objectIsPrototypeOf;
+       var isRegExp$1 = isRegexp;
+       var toString$9 = toString$k;
+       var regExpFlags$1 = regexpFlags$1;
+       var stickyHelpers = regexpStickyHelpers;
+       var redefine$3 = redefine$h.exports;
+       var fails$a = fails$S;
+       var hasOwn$2 = hasOwnProperty_1;
+       var enforceInternalState = internalState.enforce;
+       var setSpecies = setSpecies$5;
+       var wellKnownSymbol$1 = wellKnownSymbol$t;
+       var UNSUPPORTED_DOT_ALL = regexpUnsupportedDotAll;
+       var UNSUPPORTED_NCG = regexpUnsupportedNcg;
 
-
-
-
-
-       var setInternalState$8 = internalState.set;
-
-
-
-       var MATCH$1 = wellKnownSymbol('match');
-       var NativeRegExp = global_1.RegExp;
+       var MATCH$1 = wellKnownSymbol$1('match');
+       var NativeRegExp = global$b.RegExp;
        var RegExpPrototype$1 = NativeRegExp.prototype;
+       var SyntaxError$1 = global$b.SyntaxError;
+       var getFlags = uncurryThis$e(regExpFlags$1);
+       var exec$2 = uncurryThis$e(RegExpPrototype$1.exec);
+       var charAt$1 = uncurryThis$e(''.charAt);
+       var replace$3 = uncurryThis$e(''.replace);
+       var stringIndexOf$1 = uncurryThis$e(''.indexOf);
+       var stringSlice$4 = uncurryThis$e(''.slice);
+       // TODO: Use only propper RegExpIdentifierName
+       var IS_NCG = /^\?<[^\s\d!#%&*+<=>@^][^\s!#%&*+<=>@^]*>/;
        var re1 = /a/g;
        var re2 = /a/g;
 
        // "new" should create a new object, old webkit bug
        var CORRECT_NEW = new NativeRegExp(re1) !== re1;
 
-       var UNSUPPORTED_Y$2 = regexpStickyHelpers.UNSUPPORTED_Y;
+       var UNSUPPORTED_Y = stickyHelpers.UNSUPPORTED_Y;
 
-       var FORCED$b = descriptors && isForced_1('RegExp', (!CORRECT_NEW || UNSUPPORTED_Y$2 || fails(function () {
-         re2[MATCH$1] = false;
-         // RegExp constructor can alter flags and IsRegExp works correct with @@match
-         return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
-       })));
+       var BASE_FORCED = DESCRIPTORS$4 &&
+         (!CORRECT_NEW || UNSUPPORTED_Y || UNSUPPORTED_DOT_ALL || UNSUPPORTED_NCG || fails$a(function () {
+           re2[MATCH$1] = false;
+           // RegExp constructor can alter flags and IsRegExp works correct with @@match
+           return NativeRegExp(re1) != re1 || NativeRegExp(re2) == re2 || NativeRegExp(re1, 'i') != '/a/i';
+         }));
+
+       var handleDotAll = function (string) {
+         var length = string.length;
+         var index = 0;
+         var result = '';
+         var brackets = false;
+         var chr;
+         for (; index <= length; index++) {
+           chr = charAt$1(string, index);
+           if (chr === '\\') {
+             result += chr + charAt$1(string, ++index);
+             continue;
+           }
+           if (!brackets && chr === '.') {
+             result += '[\\s\\S]';
+           } else {
+             if (chr === '[') {
+               brackets = true;
+             } else if (chr === ']') {
+               brackets = false;
+             } result += chr;
+           }
+         } return result;
+       };
+
+       var handleNCG = function (string) {
+         var length = string.length;
+         var index = 0;
+         var result = '';
+         var named = [];
+         var names = {};
+         var brackets = false;
+         var ncg = false;
+         var groupid = 0;
+         var groupname = '';
+         var chr;
+         for (; index <= length; index++) {
+           chr = charAt$1(string, index);
+           if (chr === '\\') {
+             chr = chr + charAt$1(string, ++index);
+           } else if (chr === ']') {
+             brackets = false;
+           } else if (!brackets) switch (true) {
+             case chr === '[':
+               brackets = true;
+               break;
+             case chr === '(':
+               if (exec$2(IS_NCG, stringSlice$4(string, index + 1))) {
+                 index += 2;
+                 ncg = true;
+               }
+               result += chr;
+               groupid++;
+               continue;
+             case chr === '>' && ncg:
+               if (groupname === '' || hasOwn$2(names, groupname)) {
+                 throw new SyntaxError$1('Invalid capture group name');
+               }
+               names[groupname] = true;
+               named[named.length] = [groupname, groupid];
+               ncg = false;
+               groupname = '';
+               continue;
+           }
+           if (ncg) groupname += chr;
+           else result += chr;
+         } return [result, named];
+       };
 
        // `RegExp` constructor
-       // https://tc39.github.io/ecma262/#sec-regexp-constructor
-       if (FORCED$b) {
+       // https://tc39.es/ecma262/#sec-regexp-constructor
+       if (isForced$1('RegExp', BASE_FORCED)) {
          var RegExpWrapper = function RegExp(pattern, flags) {
-           var thisIsRegExp = this instanceof RegExpWrapper;
-           var patternIsRegExp = isRegexp(pattern);
+           var thisIsRegExp = isPrototypeOf$1(RegExpPrototype$1, this);
+           var patternIsRegExp = isRegExp$1(pattern);
            var flagsAreUndefined = flags === undefined;
-           var sticky;
+           var groups = [];
+           var rawPattern = pattern;
+           var rawFlags, dotAll, sticky, handled, result, state;
 
-           if (!thisIsRegExp && patternIsRegExp && pattern.constructor === RegExpWrapper && flagsAreUndefined) {
+           if (!thisIsRegExp && patternIsRegExp && flagsAreUndefined && pattern.constructor === RegExpWrapper) {
              return pattern;
            }
 
-           if (CORRECT_NEW) {
-             if (patternIsRegExp && !flagsAreUndefined) pattern = pattern.source;
-           } else if (pattern instanceof RegExpWrapper) {
-             if (flagsAreUndefined) flags = regexpFlags.call(pattern);
+           if (patternIsRegExp || isPrototypeOf$1(RegExpPrototype$1, pattern)) {
              pattern = pattern.source;
+             if (flagsAreUndefined) flags = 'flags' in rawPattern ? rawPattern.flags : getFlags(rawPattern);
            }
 
-           if (UNSUPPORTED_Y$2) {
-             sticky = !!flags && flags.indexOf('y') > -1;
-             if (sticky) flags = flags.replace(/y/g, '');
+           pattern = pattern === undefined ? '' : toString$9(pattern);
+           flags = flags === undefined ? '' : toString$9(flags);
+           rawPattern = pattern;
+
+           if (UNSUPPORTED_DOT_ALL && 'dotAll' in re1) {
+             dotAll = !!flags && stringIndexOf$1(flags, 's') > -1;
+             if (dotAll) flags = replace$3(flags, /s/g, '');
            }
 
-           var result = inheritIfRequired(
-             CORRECT_NEW ? new NativeRegExp(pattern, flags) : NativeRegExp(pattern, flags),
-             thisIsRegExp ? this : RegExpPrototype$1,
-             RegExpWrapper
-           );
+           rawFlags = flags;
+
+           if (UNSUPPORTED_Y && 'sticky' in re1) {
+             sticky = !!flags && stringIndexOf$1(flags, 'y') > -1;
+             if (sticky) flags = replace$3(flags, /y/g, '');
+           }
+
+           if (UNSUPPORTED_NCG) {
+             handled = handleNCG(pattern);
+             pattern = handled[0];
+             groups = handled[1];
+           }
 
-           if (UNSUPPORTED_Y$2 && sticky) setInternalState$8(result, { sticky: sticky });
+           result = inheritIfRequired$1(NativeRegExp(pattern, flags), thisIsRegExp ? this : RegExpPrototype$1, RegExpWrapper);
+
+           if (dotAll || sticky || groups.length) {
+             state = enforceInternalState(result);
+             if (dotAll) {
+               state.dotAll = true;
+               state.raw = RegExpWrapper(handleDotAll(pattern), rawFlags);
+             }
+             if (sticky) state.sticky = true;
+             if (groups.length) state.groups = groups;
+           }
+
+           if (pattern !== rawPattern) try {
+             // fails in old engines, but we have no alternatives for unsupported regex syntax
+             createNonEnumerableProperty(result, 'source', rawPattern === '' ? '(?:)' : rawPattern);
+           } catch (error) { /* empty */ }
 
            return result;
          };
+
          var proxy = function (key) {
-           key in RegExpWrapper || defineProperty$9(RegExpWrapper, key, {
+           key in RegExpWrapper || defineProperty$1(RegExpWrapper, key, {
              configurable: true,
              get: function () { return NativeRegExp[key]; },
              set: function (it) { NativeRegExp[key] = it; }
            });
          };
-         var keys$2 = getOwnPropertyNames$1(NativeRegExp);
-         var index = 0;
-         while (keys$2.length > index) proxy(keys$2[index++]);
+
+         for (var keys$1 = getOwnPropertyNames$1(NativeRegExp), index$1 = 0; keys$1.length > index$1;) {
+           proxy(keys$1[index$1++]);
+         }
+
          RegExpPrototype$1.constructor = RegExpWrapper;
          RegExpWrapper.prototype = RegExpPrototype$1;
-         redefine(global_1, 'RegExp', RegExpWrapper);
+         redefine$3(global$b, 'RegExp', RegExpWrapper);
        }
 
-       // https://tc39.github.io/ecma262/#sec-get-regexp-@@species
+       // https://tc39.es/ecma262/#sec-get-regexp-@@species
        setSpecies('RegExp');
 
        function define (constructor, factory, prototype) {
          constructor.prototype = factory.prototype = prototype;
          prototype.constructor = constructor;
        }
-       function extend(parent, definition) {
+       function extend$3(parent, definition) {
          var prototype = Object.create(parent.prototype);
 
          for (var key in definition) {
          this.b = +b;
          this.opacity = +opacity;
        }
-       define(Rgb, rgb, extend(Color, {
+       define(Rgb, rgb, extend$3(Color, {
          brighter: function brighter(k) {
            k = k == null ? _brighter : Math.pow(_brighter, k);
            return new Rgb(this.r * k, this.g * k, this.b * k, this.opacity);
        }));
 
        function rgb_formatHex() {
-         return "#" + hex$2(this.r) + hex$2(this.g) + hex$2(this.b);
+         return "#" + hex$1(this.r) + hex$1(this.g) + hex$1(this.b);
        }
 
        function rgb_formatRgb() {
          return (a === 1 ? "rgb(" : "rgba(") + Math.max(0, Math.min(255, Math.round(this.r) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.g) || 0)) + ", " + Math.max(0, Math.min(255, Math.round(this.b) || 0)) + (a === 1 ? ")" : ", " + a + ")");
        }
 
-       function hex$2(value) {
+       function hex$1(value) {
          value = Math.max(0, Math.min(255, Math.round(value) || 0));
          return (value < 16 ? "0" : "") + value.toString(16);
        }
          this.opacity = +opacity;
        }
 
-       define(Hsl, hsl, extend(Color, {
+       define(Hsl, hsl, extend$3(Color, {
          brighter: function brighter(k) {
            k = k == null ? _brighter : Math.pow(_brighter, k);
            return new Hsl(this.h, this.s, this.l * k, this.opacity);
          return (h < 60 ? m1 + (m2 - m1) * h / 60 : h < 180 ? m2 : h < 240 ? m1 + (m2 - m1) * (240 - h) / 60 : m1) * 255;
        }
 
-       var constant$2 = (function (x) {
+       var constant$1 = (function (x) {
          return function () {
            return x;
          };
        });
 
-       function linear(a, d) {
+       function linear$2(a, d) {
          return function (t) {
            return a + t * d;
          };
        }
        function gamma(y) {
          return (y = +y) === 1 ? nogamma : function (a, b) {
-           return b - a ? exponential(a, b, y) : constant$2(isNaN(a) ? b : a);
+           return b - a ? exponential(a, b, y) : constant$1(isNaN(a) ? b : a);
          };
        }
        function nogamma(a, b) {
          var d = b - a;
-         return d ? linear(a, d) : constant$2(isNaN(a) ? b : a);
+         return d ? linear$2(a, d) : constant$1(isNaN(a) ? b : a);
        }
 
        var d3_interpolateRgb = (function rgbGamma(y) {
              i;
 
          for (i = 0; i < na; ++i) {
-           x[i] = interpolate(a[i], b[i]);
+           x[i] = interpolate$1(a[i], b[i]);
          }
 
          for (; i < nb; ++i) {
 
          for (k in b) {
            if (k in a) {
-             i[k] = interpolate(a[k], b[k]);
+             i[k] = interpolate$1(a[k], b[k]);
            } else {
              c[k] = b[k];
            }
          });
        }
 
-       function interpolate (a, b) {
+       function interpolate$1 (a, b) {
          var t = _typeof(b),
              c;
 
-         return b == null || t === "boolean" ? constant$2(b) : (t === "number" ? d3_interpolateNumber : t === "string" ? (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString : b instanceof color ? d3_interpolateRgb : b instanceof Date ? date : isNumberArray(b) ? numberArray : Array.isArray(b) ? genericArray : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object : d3_interpolateNumber)(a, b);
+         return b == null || t === "boolean" ? constant$1(b) : (t === "number" ? d3_interpolateNumber : t === "string" ? (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString : b instanceof color ? d3_interpolateRgb : b instanceof Date ? date : isNumberArray(b) ? numberArray : Array.isArray(b) ? genericArray : typeof b.valueOf !== "function" && typeof b.toString !== "function" || isNaN(b) ? object : d3_interpolateNumber)(a, b);
        }
 
        function interpolateRound (a, b) {
          };
        }
 
-       var degrees$1 = 180 / Math.PI;
-       var identity$1 = {
+       var degrees = 180 / Math.PI;
+       var identity$3 = {
          translateX: 0,
          translateY: 0,
          rotate: 0,
          return {
            translateX: e,
            translateY: f,
-           rotate: Math.atan2(b, a) * degrees$1,
-           skewX: Math.atan(skewX) * degrees$1,
+           rotate: Math.atan2(b, a) * degrees,
+           skewX: Math.atan(skewX) * degrees,
            scaleX: scaleX,
            scaleY: scaleY
          };
 
        function parseCss(value) {
          var m = new (typeof DOMMatrix === "function" ? DOMMatrix : WebKitCSSMatrix)(value + "");
-         return m.isIdentity ? identity$1 : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
+         return m.isIdentity ? identity$3 : decompose(m.a, m.b, m.c, m.d, m.e, m.f);
        }
        function parseSvg(value) {
-         if (value == null) return identity$1;
+         if (value == null) return identity$3;
          if (!svgNode) svgNode = document.createElementNS("http://www.w3.org/2000/svg", "g");
          svgNode.setAttribute("transform", value);
-         if (!(value = svgNode.transform.baseVal.consolidate())) return identity$1;
+         if (!(value = svgNode.transform.baseVal.consolidate())) return identity$3;
          value = value.matrix;
          return decompose(value.a, value.b, value.c, value.d, value.e, value.f);
        }
        var interpolateTransformCss = interpolateTransform(parseCss, "px, ", "px)", "deg)");
        var interpolateTransformSvg = interpolateTransform(parseSvg, ", ", ")", ")");
 
-       var epsilon2$1 = 1e-12;
+       var epsilon2 = 1e-12;
 
        function cosh(x) {
          return ((x = Math.exp(x)) + 1 / x) / 2;
                i,
                S; // Special case for u0 ≅ u1.
 
-           if (d2 < epsilon2$1) {
+           if (d2 < epsilon2) {
              S = Math.log(w1 / w0) / rho;
 
              i = function i(t) {
              };
            } // General case.
            else {
-               var d1 = Math.sqrt(d2),
-                   b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
-                   b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
-                   r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
-                   r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
-               S = (r1 - r0) / rho;
-
-               i = function i(t) {
-                 var s = t * S,
-                     coshr0 = cosh(r0),
-                     u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
-                 return [ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / cosh(rho * s + r0)];
-               };
-             }
+             var d1 = Math.sqrt(d2),
+                 b0 = (w1 * w1 - w0 * w0 + rho4 * d2) / (2 * w0 * rho2 * d1),
+                 b1 = (w1 * w1 - w0 * w0 - rho4 * d2) / (2 * w1 * rho2 * d1),
+                 r0 = Math.log(Math.sqrt(b0 * b0 + 1) - b0),
+                 r1 = Math.log(Math.sqrt(b1 * b1 + 1) - b1);
+             S = (r1 - r0) / rho;
+
+             i = function i(t) {
+               var s = t * S,
+                   coshr0 = cosh(r0),
+                   u = w0 / (rho2 * d1) * (coshr0 * tanh(rho * s + r0) - sinh(r0));
+               return [ux0 + u * dx, uy0 + u * dy, w0 * coshr0 / cosh(rho * s + r0)];
+             };
+           }
 
            i.duration = S * 1000 * rho / Math.SQRT2;
            return i;
          return samples;
        }
 
+       var $$t = _export;
+       var bind$4 = functionBind;
+
        // `Function.prototype.bind` method
-       // https://tc39.github.io/ecma262/#sec-function.prototype.bind
-       _export({ target: 'Function', proto: true }, {
-         bind: functionBind
+       // https://tc39.es/ecma262/#sec-function.prototype.bind
+       $$t({ target: 'Function', proto: true }, {
+         bind: bind$4
        });
 
        var frame = 0,
            setFrame = (typeof window === "undefined" ? "undefined" : _typeof(window)) === "object" && window.requestAnimationFrame ? window.requestAnimationFrame.bind(window) : function (f) {
          setTimeout(f, 17);
        };
-       function now() {
+       function now$1() {
          return clockNow || (setFrame(clearNow), clockNow = clock.now() + clockSkew);
        }
 
          constructor: Timer,
          restart: function restart(callback, delay, time) {
            if (typeof callback !== "function") throw new TypeError("callback is not a function");
-           time = (time == null ? now() : +time) + (delay == null ? 0 : +delay);
+           time = (time == null ? now$1() : +time) + (delay == null ? 0 : +delay);
 
            if (!this._next && taskTail !== this) {
              if (taskTail) taskTail._next = this;else taskHead = this;
          return t;
        }
        function timerFlush() {
-         now(); // Get the current time, if not already set.
+         now$1(); // Get the current time, if not already set.
 
          ++frame; // Pretend we’ve set an alarm, if we haven’t already.
 
          return t;
        }
 
-       var emptyOn = dispatch("start", "end", "cancel", "interrupt");
+       var emptyOn = dispatch$8("start", "end", "cancel", "interrupt");
        var emptyTween = [];
        var CREATED = 0;
        var SCHEDULED = 1;
        function schedule (node, name, id, index, group, timing) {
          var schedules = node.__transition;
          if (!schedules) node.__transition = {};else if (id in schedules) return;
-         create(node, id, {
+         create$2(node, id, {
            name: name,
            index: index,
            // For context during callback.
          });
        }
        function init(node, id) {
-         var schedule = get$4(node, id);
+         var schedule = get$1(node, id);
          if (schedule.state > CREATED) throw new Error("too late; already scheduled");
          return schedule;
        }
-       function set$4(node, id) {
-         var schedule = get$4(node, id);
+       function set(node, id) {
+         var schedule = get$1(node, id);
          if (schedule.state > STARTED) throw new Error("too late; already running");
          return schedule;
        }
-       function get$4(node, id) {
+       function get$1(node, id) {
          var schedule = node.__transition;
          if (!schedule || !(schedule = schedule[id])) throw new Error("transition not found");
          return schedule;
        }
 
-       function create(node, id, self) {
+       function create$2(node, id, self) {
          var schedules = node.__transition,
              tween; // Initialize the self timer when the transition is created.
          // Note the actual delay is not known until the first callback!
                delete schedules[i];
              } // Cancel any pre-empted transitions.
              else if (+i < id) {
-                 o.state = ENDED;
-                 o.timer.stop();
-                 o.on.call("cancel", node, node.__data__, o.index, o.group);
-                 delete schedules[i];
-               }
+               o.state = ENDED;
+               o.timer.stop();
+               o.on.call("cancel", node, node.__data__, o.index, o.group);
+               delete schedules[i];
+             }
            } // Defer the first tick to end of the current frame; see d3/d3#1576.
            // Note the transition may be canceled after start and before the first tick!
            // Note this must be scheduled before the start event; see d3/d3-transition#16!
        function tweenRemove(id, name) {
          var tween0, tween1;
          return function () {
-           var schedule = set$4(this, id),
+           var schedule = set(this, id),
                tween = schedule.tween; // If this node shared tween with the previous node,
            // just assign the updated shared tween and we’re done!
            // Otherwise, copy-on-write.
          var tween0, tween1;
          if (typeof value !== "function") throw new Error();
          return function () {
-           var schedule = set$4(this, id),
+           var schedule = set(this, id),
                tween = schedule.tween; // If this node shared tween with the previous node,
            // just assign the updated shared tween and we’re done!
            // Otherwise, copy-on-write.
          name += "";
 
          if (arguments.length < 2) {
-           var tween = get$4(this.node(), id).tween;
+           var tween = get$1(this.node(), id).tween;
 
            for (var i = 0, n = tween.length, t; i < n; ++i) {
              if ((t = tween[i]).name === name) {
        function tweenValue(transition, name, value) {
          var id = transition._id;
          transition.each(function () {
-           var schedule = set$4(this, id);
+           var schedule = set(this, id);
            (schedule.value || (schedule.value = {}))[name] = value.apply(this, arguments);
          });
          return function (node) {
-           return get$4(node, id).value[name];
+           return get$1(node, id).value[name];
          };
        }
 
-       function interpolate$1 (a, b) {
+       function interpolate (a, b) {
          var c;
          return (typeof b === "number" ? d3_interpolateNumber : b instanceof color ? d3_interpolateRgb : (c = color(b)) ? (b = c, d3_interpolateRgb) : interpolateString)(a, b);
        }
 
-       function attrRemove$1(name) {
+       function attrRemove(name) {
          return function () {
            this.removeAttribute(name);
          };
        }
 
-       function attrRemoveNS$1(fullname) {
+       function attrRemoveNS(fullname) {
          return function () {
            this.removeAttributeNS(fullname.space, fullname.local);
          };
        }
 
-       function attrConstant$1(name, interpolate, value1) {
+       function attrConstant(name, interpolate, value1) {
          var string00,
              string1 = value1 + "",
              interpolate0;
          };
        }
 
-       function attrConstantNS$1(fullname, interpolate, value1) {
+       function attrConstantNS(fullname, interpolate, value1) {
          var string00,
              string1 = value1 + "",
              interpolate0;
          };
        }
 
-       function attrFunction$1(name, interpolate, value) {
+       function attrFunction(name, interpolate, value) {
          var string00, string10, interpolate0;
          return function () {
            var string0,
          };
        }
 
-       function attrFunctionNS$1(fullname, interpolate, value) {
+       function attrFunctionNS(fullname, interpolate, value) {
          var string00, string10, interpolate0;
          return function () {
            var string0,
 
        function transition_attr (name, value) {
          var fullname = namespace(name),
-             i = fullname === "transform" ? interpolateTransformSvg : interpolate$1;
-         return this.attrTween(name, typeof value === "function" ? (fullname.local ? attrFunctionNS$1 : attrFunction$1)(fullname, i, tweenValue(this, "attr." + name, value)) : value == null ? (fullname.local ? attrRemoveNS$1 : attrRemove$1)(fullname) : (fullname.local ? attrConstantNS$1 : attrConstant$1)(fullname, i, value));
+             i = fullname === "transform" ? interpolateTransformSvg : interpolate;
+         return this.attrTween(name, typeof value === "function" ? (fullname.local ? attrFunctionNS : attrFunction)(fullname, i, tweenValue(this, "attr." + name, value)) : value == null ? (fullname.local ? attrRemoveNS : attrRemove)(fullname) : (fullname.local ? attrConstantNS : attrConstant)(fullname, i, value));
        }
 
        function attrInterpolate(name, i) {
 
        function transition_delay (value) {
          var id = this._id;
-         return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$4(this.node(), id).delay;
+         return arguments.length ? this.each((typeof value === "function" ? delayFunction : delayConstant)(id, value)) : get$1(this.node(), id).delay;
        }
 
        function durationFunction(id, value) {
          return function () {
-           set$4(this, id).duration = +value.apply(this, arguments);
+           set(this, id).duration = +value.apply(this, arguments);
          };
        }
 
        function durationConstant(id, value) {
          return value = +value, function () {
-           set$4(this, id).duration = value;
+           set(this, id).duration = value;
          };
        }
 
        function transition_duration (value) {
          var id = this._id;
-         return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$4(this.node(), id).duration;
+         return arguments.length ? this.each((typeof value === "function" ? durationFunction : durationConstant)(id, value)) : get$1(this.node(), id).duration;
        }
 
        function easeConstant(id, value) {
          if (typeof value !== "function") throw new Error();
          return function () {
-           set$4(this, id).ease = value;
+           set(this, id).ease = value;
          };
        }
 
        function transition_ease (value) {
          var id = this._id;
-         return arguments.length ? this.each(easeConstant(id, value)) : get$4(this.node(), id).ease;
+         return arguments.length ? this.each(easeConstant(id, value)) : get$1(this.node(), id).ease;
        }
 
        function easeVarying(id, value) {
          return function () {
            var v = value.apply(this, arguments);
            if (typeof v !== "function") throw new Error();
-           set$4(this, id).ease = v;
+           set(this, id).ease = v;
          };
        }
 
        function onFunction(id, name, listener) {
          var on0,
              on1,
-             sit = start(name) ? init : set$4;
+             sit = start(name) ? init : set;
          return function () {
            var schedule = sit(this, id),
                on = schedule.on; // If this node shared a dispatch with the previous node,
 
        function transition_on (name, listener) {
          var id = this._id;
-         return arguments.length < 2 ? get$4(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));
+         return arguments.length < 2 ? get$1(this.node(), id).on.on(name) : this.each(onFunction(id, name, listener));
        }
 
        function removeFunction(id) {
              if ((node = group[i]) && (subnode = select.call(node, node.__data__, i, group))) {
                if ("__data__" in node) subnode.__data__ = node.__data__;
                subgroup[i] = subnode;
-               schedule(subgroup[i], name, id, i, subgroup, get$4(node, id));
+               schedule(subgroup[i], name, id, i, subgroup, get$1(node, id));
              }
            }
          }
          for (var groups = this._groups, m = groups.length, subgroups = [], parents = [], j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
              if (node = group[i]) {
-               for (var children = select.call(node, node.__data__, i, group), child, inherit = get$4(node, id), k = 0, l = children.length; k < l; ++k) {
+               for (var children = select.call(node, node.__data__, i, group), child, inherit = get$1(node, id), k = 0, l = children.length; k < l; ++k) {
                  if (child = children[k]) {
                    schedule(child, name, id, k, children, inherit);
                  }
          return new Transition(subgroups, parents, name, id);
        }
 
-       var Selection$1 = selection.prototype.constructor;
+       var Selection = selection.prototype.constructor;
        function transition_selection () {
-         return new Selection$1(this._groups, this._parents);
+         return new Selection(this._groups, this._parents);
        }
 
        function styleNull(name, interpolate) {
          };
        }
 
-       function styleRemove$1(name) {
+       function styleRemove(name) {
          return function () {
            this.style.removeProperty(name);
          };
        }
 
-       function styleConstant$1(name, interpolate, value1) {
+       function styleConstant(name, interpolate, value1) {
          var string00,
              string1 = value1 + "",
              interpolate0;
          };
        }
 
-       function styleFunction$1(name, interpolate, value) {
+       function styleFunction(name, interpolate, value) {
          var string00, string10, interpolate0;
          return function () {
            var string0 = styleValue(this, name),
              event = "end." + key,
              remove;
          return function () {
-           var schedule = set$4(this, id),
+           var schedule = set(this, id),
                on = schedule.on,
-               listener = schedule.value[key] == null ? remove || (remove = styleRemove$1(name)) : undefined; // If this node shared a dispatch with the previous node,
+               listener = schedule.value[key] == null ? remove || (remove = styleRemove(name)) : undefined; // If this node shared a dispatch with the previous node,
            // just assign the updated shared dispatch and we’re done!
            // Otherwise, copy-on-write.
 
        }
 
        function transition_style (name, value, priority) {
-         var i = (name += "") === "transform" ? interpolateTransformCss : interpolate$1;
-         return value == null ? this.styleTween(name, styleNull(name, i)).on("end.style." + name, styleRemove$1(name)) : typeof value === "function" ? this.styleTween(name, styleFunction$1(name, i, tweenValue(this, "style." + name, value))).each(styleMaybeRemove(this._id, name)) : this.styleTween(name, styleConstant$1(name, i, value), priority).on("end.style." + name, null);
+         var i = (name += "") === "transform" ? interpolateTransformCss : interpolate;
+         return value == null ? this.styleTween(name, styleNull(name, i)).on("end.style." + name, styleRemove(name)) : typeof value === "function" ? this.styleTween(name, styleFunction(name, i, tweenValue(this, "style." + name, value))).each(styleMaybeRemove(this._id, name)) : this.styleTween(name, styleConstant(name, i, value), priority).on("end.style." + name, null);
        }
 
        function styleInterpolate(name, i, priority) {
          return this.tween(key, styleTween(name, value, priority == null ? "" : priority));
        }
 
-       function textConstant$1(value) {
+       function textConstant(value) {
          return function () {
            this.textContent = value;
          };
        }
 
-       function textFunction$1(value) {
+       function textFunction(value) {
          return function () {
            var value1 = value(this);
            this.textContent = value1 == null ? "" : value1;
        }
 
        function transition_text (value) {
-         return this.tween("text", typeof value === "function" ? textFunction$1(tweenValue(this, "text", value)) : textConstant$1(value == null ? "" : value + ""));
+         return this.tween("text", typeof value === "function" ? textFunction(tweenValue(this, "text", value)) : textConstant(value == null ? "" : value + ""));
        }
 
        function textInterpolate(i) {
          for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
            for (var group = groups[j], n = group.length, node, i = 0; i < n; ++i) {
              if (node = group[i]) {
-               var inherit = get$4(node, id0);
+               var inherit = get$1(node, id0);
                schedule(node, name, id1, i, group, {
                  time: inherit.time + inherit.delay + inherit.duration,
                  delay: 0,
              }
            };
            that.each(function () {
-             var schedule = set$4(this, id),
+             var schedule = set(this, id),
                  on = schedule.on; // If this node shared a dispatch with the previous node,
              // just assign the updated shared dispatch and we’re done!
              // Otherwise, copy-on-write.
          });
        }
 
-       var id$1 = 0;
+       var id = 0;
        function Transition(groups, parents, name, id) {
          this._groups = groups;
          this._parents = parents;
          this._name = name;
          this._id = id;
        }
-       function transition(name) {
-         return selection().transition(name);
-       }
        function newId() {
-         return ++id$1;
+         return ++id;
        }
        var selection_prototype = selection.prototype;
-       Transition.prototype = transition.prototype = _defineProperty({
+       Transition.prototype = _defineProperty({
          constructor: Transition,
          select: transition_select,
          selectAll: transition_selectAll,
          if (name instanceof Transition) {
            id = name._id, name = name._name;
          } else {
-           id = newId(), (timing = defaultTiming).time = now(), name = name == null ? null : name + "";
+           id = newId(), (timing = defaultTiming).time = now$1(), name = name == null ? null : name + "";
          }
 
          for (var groups = this._groups, m = groups.length, j = 0; j < m; ++j) {
        selection.prototype.interrupt = selection_interrupt;
        selection.prototype.transition = selection_transition;
 
-       var constant$3 = (function (x) {
+       var constant = (function (x) {
          return function () {
            return x;
          };
        };
        var identity$2 = new Transform(1, 0, 0);
 
-       function nopropagation$1(event) {
+       function nopropagation(event) {
          event.stopImmediatePropagation();
        }
-       function noevent$1 (event) {
+       function noevent (event) {
          event.preventDefault();
          event.stopImmediatePropagation();
        }
          return (!event.ctrlKey || event.type === 'wheel') && !event.button;
        }
 
-       function defaultExtent() {
+       function defaultExtent$1() {
          var e = this;
 
          if (e instanceof SVGElement) {
          return this.__zoom || identity$2;
        }
 
-       function defaultWheelDelta(event) {
+       function defaultWheelDelta$1(event) {
          return -event.deltaY * (event.deltaMode === 1 ? 0.05 : event.deltaMode ? 1 : 0.002) * (event.ctrlKey ? 10 : 1);
        }
 
-       function defaultTouchable$1() {
+       function defaultTouchable() {
          return navigator.maxTouchPoints || "ontouchstart" in this;
        }
 
-       function defaultConstrain(transform, extent, translateExtent) {
+       function defaultConstrain$1(transform, extent, translateExtent) {
          var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
              dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
              dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
 
        function d3_zoom () {
          var filter = defaultFilter$1,
-             extent = defaultExtent,
-             constrain = defaultConstrain,
-             wheelDelta = defaultWheelDelta,
-             touchable = defaultTouchable$1,
+             extent = defaultExtent$1,
+             constrain = defaultConstrain$1,
+             wheelDelta = defaultWheelDelta$1,
+             touchable = defaultTouchable,
              scaleExtent = [0, Infinity],
              translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
              duration = 250,
              interpolate = interpolateZoom,
-             listeners = dispatch("start", "zoom", "end"),
+             listeners = dispatch$8("start", "zoom", "end"),
              touchstarting,
              touchfirst,
              touchending,
              return function (t) {
                if (t === 1) t = b; // Avoid rounding error on end.
                else {
-                   var l = i(t),
-                       k = w / l[2];
-                   t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
-                 }
+                 var l = i(t),
+                     k = w / l[2];
+                 t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
+               }
                g.zoom(null, t);
              };
            });
              clearTimeout(g.wheel);
            } // If this wheel event won’t trigger a transform change, ignore it.
            else if (t.k === k) return; // Otherwise, capture the mouse point and location at the start.
-             else {
-                 g.mouse = [p, t.invert(p)];
-                 interrupt(this);
-                 g.start();
-               }
+           else {
+             g.mouse = [p, t.invert(p)];
+             interrupt(this);
+             g.start();
+           }
 
-           noevent$1(event);
+           noevent(event);
            g.wheel = setTimeout(wheelidled, wheelDelay);
            g.zoom("mouse", constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
 
                x0 = event.clientX,
                y0 = event.clientY;
            dragDisable(event.view);
-           nopropagation$1(event);
+           nopropagation(event);
            g.mouse = [p, this.__zoom.invert(p)];
            interrupt(this);
            g.start();
 
            function mousemoved(event) {
-             noevent$1(event);
+             noevent(event);
 
              if (!g.moved) {
                var dx = event.clientX - x0,
            function mouseupped(event) {
              v.on("mousemove.zoom mouseup.zoom", null);
              yesdrag(event.view, g.moved);
-             noevent$1(event);
+             noevent(event);
              g.event(event).end();
            }
          }
                p1 = t0.invert(p0),
                k1 = t0.k * (event.shiftKey ? 0.5 : 2),
                t1 = constrain(translate(scale(t0, k1), p0, p1), extent.apply(this, args), translateExtent);
-           noevent$1(event);
+           noevent(event);
            if (duration > 0) select(this).transition().duration(duration).call(schedule, t1, p0, event);else select(this).call(zoom.transform, t1, p0, event);
          }
 
                i,
                t,
                p;
-           nopropagation$1(event);
+           nopropagation(event);
 
            for (i = 0; i < n; ++i) {
              t = touches[i], p = pointer(t, this);
                t,
                p,
                l;
-           noevent$1(event);
+           noevent(event);
 
            for (i = 0; i < n; ++i) {
              t = touches[i], p = pointer(t, this);
                n = touches.length,
                i,
                t;
-           nopropagation$1(event);
+           nopropagation(event);
            if (touchending) clearTimeout(touchending);
            touchending = setTimeout(function () {
              touchending = null;
          }
 
          zoom.wheelDelta = function (_) {
-           return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant$3(+_), zoom) : wheelDelta;
+           return arguments.length ? (wheelDelta = typeof _ === "function" ? _ : constant(+_), zoom) : wheelDelta;
          };
 
          zoom.filter = function (_) {
-           return arguments.length ? (filter = typeof _ === "function" ? _ : constant$3(!!_), zoom) : filter;
+           return arguments.length ? (filter = typeof _ === "function" ? _ : constant(!!_), zoom) : filter;
          };
 
          zoom.touchable = function (_) {
-           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant$3(!!_), zoom) : touchable;
+           return arguments.length ? (touchable = typeof _ === "function" ? _ : constant(!!_), zoom) : touchable;
          };
 
          zoom.extent = function (_) {
-           return arguments.length ? (extent = typeof _ === "function" ? _ : constant$3([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+           return arguments.length ? (extent = typeof _ === "function" ? _ : constant([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
          };
 
          zoom.scaleExtent = function (_) {
          return score;
        }
 
-       var onFreeze = internalMetadata.onFreeze;
+       var call$3 = functionCall;
+       var fixRegExpWellKnownSymbolLogic$1 = fixRegexpWellKnownSymbolLogic;
+       var anObject$1 = anObject$n;
+       var toLength$3 = toLength$c;
+       var toString$8 = toString$k;
+       var requireObjectCoercible$7 = requireObjectCoercible$e;
+       var getMethod$1 = getMethod$7;
+       var advanceStringIndex = advanceStringIndex$3;
+       var regExpExec$1 = regexpExecAbstract;
+
+       // @@match logic
+       fixRegExpWellKnownSymbolLogic$1('match', function (MATCH, nativeMatch, maybeCallNative) {
+         return [
+           // `String.prototype.match` method
+           // https://tc39.es/ecma262/#sec-string.prototype.match
+           function match(regexp) {
+             var O = requireObjectCoercible$7(this);
+             var matcher = regexp == undefined ? undefined : getMethod$1(regexp, MATCH);
+             return matcher ? call$3(matcher, regexp, O) : new RegExp(regexp)[MATCH](toString$8(O));
+           },
+           // `RegExp.prototype[@@match]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@match
+           function (string) {
+             var rx = anObject$1(this);
+             var S = toString$8(string);
+             var res = maybeCallNative(nativeMatch, rx, S);
+
+             if (res.done) return res.value;
+
+             if (!rx.global) return regExpExec$1(rx, S);
+
+             var fullUnicode = rx.unicode;
+             rx.lastIndex = 0;
+             var A = [];
+             var n = 0;
+             var result;
+             while ((result = regExpExec$1(rx, S)) !== null) {
+               var matchStr = toString$8(result[0]);
+               A[n] = matchStr;
+               if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength$3(rx.lastIndex), fullUnicode);
+               n++;
+             }
+             return n === 0 ? null : A;
+           }
+         ];
+       });
+
+       var $$s = _export;
+       var FREEZING = freezing;
+       var fails$9 = fails$S;
+       var isObject$4 = isObject$s;
+       var onFreeze = internalMetadata.exports.onFreeze;
 
-       var nativeFreeze = Object.freeze;
-       var FAILS_ON_PRIMITIVES$4 = fails(function () { nativeFreeze(1); });
+       // eslint-disable-next-line es/no-object-freeze -- safe
+       var $freeze = Object.freeze;
+       var FAILS_ON_PRIMITIVES = fails$9(function () { $freeze(1); });
 
        // `Object.freeze` method
-       // https://tc39.github.io/ecma262/#sec-object.freeze
-       _export({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES$4, sham: !freezing }, {
+       // https://tc39.es/ecma262/#sec-object.freeze
+       $$s({ target: 'Object', stat: true, forced: FAILS_ON_PRIMITIVES, sham: !FREEZING }, {
          freeze: function freeze(it) {
-           return nativeFreeze && isObject(it) ? nativeFreeze(onFreeze(it)) : it;
+           return $freeze && isObject$4(it) ? $freeze(onFreeze(it)) : it;
          }
        });
 
          }, []);
        }
 
-       // @@match logic
-       fixRegexpWellKnownSymbolLogic('match', 1, function (MATCH, nativeMatch, maybeCallNative) {
-         return [
-           // `String.prototype.match` method
-           // https://tc39.github.io/ecma262/#sec-string.prototype.match
-           function match(regexp) {
-             var O = requireObjectCoercible(this);
-             var matcher = regexp == undefined ? undefined : regexp[MATCH];
-             return matcher !== undefined ? matcher.call(regexp, O) : new RegExp(regexp)[MATCH](String(O));
-           },
-           // `RegExp.prototype[@@match]` method
-           // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@match
-           function (regexp) {
-             var res = maybeCallNative(nativeMatch, regexp, this);
-             if (res.done) return res.value;
+       var uncurryThis$d = functionUncurryThis;
 
-             var rx = anObject(regexp);
-             var S = String(this);
+       // `thisNumberValue` abstract operation
+       // https://tc39.es/ecma262/#sec-thisnumbervalue
+       var thisNumberValue$3 = uncurryThis$d(1.0.valueOf);
+
+       var DESCRIPTORS$3 = descriptors;
+       var global$a = global$1m;
+       var uncurryThis$c = functionUncurryThis;
+       var isForced = isForced_1;
+       var redefine$2 = redefine$h.exports;
+       var hasOwn$1 = hasOwnProperty_1;
+       var inheritIfRequired = inheritIfRequired$4;
+       var isPrototypeOf = objectIsPrototypeOf;
+       var isSymbol$1 = isSymbol$6;
+       var toPrimitive$1 = toPrimitive$3;
+       var fails$8 = fails$S;
+       var getOwnPropertyNames = objectGetOwnPropertyNames.f;
+       var getOwnPropertyDescriptor$2 = objectGetOwnPropertyDescriptor.f;
+       var defineProperty = objectDefineProperty.f;
+       var thisNumberValue$2 = thisNumberValue$3;
+       var trim$2 = stringTrim.trim;
 
-             if (!rx.global) return regexpExecAbstract(rx, S);
+       var NUMBER = 'Number';
+       var NativeNumber = global$a[NUMBER];
+       var NumberPrototype = NativeNumber.prototype;
+       var TypeError$4 = global$a.TypeError;
+       var arraySlice$1 = uncurryThis$c(''.slice);
+       var charCodeAt$1 = uncurryThis$c(''.charCodeAt);
+
+       // `ToNumeric` abstract operation
+       // https://tc39.es/ecma262/#sec-tonumeric
+       var toNumeric = function (value) {
+         var primValue = toPrimitive$1(value, 'number');
+         return typeof primValue == 'bigint' ? primValue : toNumber$1(primValue);
+       };
 
-             var fullUnicode = rx.unicode;
-             rx.lastIndex = 0;
-             var A = [];
-             var n = 0;
-             var result;
-             while ((result = regexpExecAbstract(rx, S)) !== null) {
-               var matchStr = String(result[0]);
-               A[n] = matchStr;
-               if (matchStr === '') rx.lastIndex = advanceStringIndex(S, toLength(rx.lastIndex), fullUnicode);
-               n++;
+       // `ToNumber` abstract operation
+       // https://tc39.es/ecma262/#sec-tonumber
+       var toNumber$1 = function (argument) {
+         var it = toPrimitive$1(argument, 'number');
+         var first, third, radix, maxCode, digits, length, index, code;
+         if (isSymbol$1(it)) throw TypeError$4('Cannot convert a Symbol value to a number');
+         if (typeof it == 'string' && it.length > 2) {
+           it = trim$2(it);
+           first = charCodeAt$1(it, 0);
+           if (first === 43 || first === 45) {
+             third = charCodeAt$1(it, 2);
+             if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix
+           } else if (first === 48) {
+             switch (charCodeAt$1(it, 1)) {
+               case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i
+               case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
+               default: return +it;
              }
-             return n === 0 ? null : A;
+             digits = arraySlice$1(it, 2);
+             length = digits.length;
+             for (index = 0; index < length; index++) {
+               code = charCodeAt$1(digits, index);
+               // parseInt parses a string to a first unavailable symbol
+               // but ToNumber should return NaN if a string contains unavailable symbols
+               if (code < 48 || code > maxCode) return NaN;
+             } return parseInt(digits, radix);
            }
-         ];
-       });
+         } return +it;
+       };
+
+       // `Number` constructor
+       // https://tc39.es/ecma262/#sec-number-constructor
+       if (isForced(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
+         var NumberWrapper = function Number(value) {
+           var n = arguments.length < 1 ? 0 : NativeNumber(toNumeric(value));
+           var dummy = this;
+           // check on 1..constructor(foo) case
+           return isPrototypeOf(NumberPrototype, dummy) && fails$8(function () { thisNumberValue$2(dummy); })
+             ? inheritIfRequired(Object(n), dummy, NumberWrapper) : n;
+         };
+         for (var keys = DESCRIPTORS$3 ? getOwnPropertyNames(NativeNumber) : (
+           // ES3:
+           'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
+           // ES2015 (in case, if modules with ES2015 Number statics required before):
+           'EPSILON,MAX_SAFE_INTEGER,MIN_SAFE_INTEGER,isFinite,isInteger,isNaN,isSafeInteger,parseFloat,parseInt,' +
+           // ESNext
+           'fromString,range'
+         ).split(','), j$1 = 0, key; keys.length > j$1; j$1++) {
+           if (hasOwn$1(NativeNumber, key = keys[j$1]) && !hasOwn$1(NumberWrapper, key)) {
+             defineProperty(NumberWrapper, key, getOwnPropertyDescriptor$2(NativeNumber, key));
+           }
+         }
+         NumberWrapper.prototype = NumberPrototype;
+         NumberPrototype.constructor = NumberWrapper;
+         redefine$2(global$a, NUMBER, NumberWrapper);
+       }
+
+       var diacritics = {};
 
-       var remove$1 = removeDiacritics;
+       var remove$6 = diacritics.remove = removeDiacritics;
        var replacementList = [{
          base: ' ',
          chars: "\xA0"
        }];
        var diacriticsMap = {};
 
-       for (var i = 0; i < replacementList.length; i += 1) {
-         var chars = replacementList[i].chars;
+       for (var i$1 = 0; i$1 < replacementList.length; i$1 += 1) {
+         var chars = replacementList[i$1].chars;
 
-         for (var j$1 = 0; j$1 < chars.length; j$1 += 1) {
-           diacriticsMap[chars[j$1]] = replacementList[i].base;
+         for (var j = 0; j < chars.length; j += 1) {
+           diacriticsMap[chars[j]] = replacementList[i$1].base;
          }
        }
 
          });
        }
 
-       var replacementList_1 = replacementList;
-       var diacriticsMap_1 = diacriticsMap;
-       var diacritics = {
-         remove: remove$1,
-         replacementList: replacementList_1,
-         diacriticsMap: diacriticsMap_1
-       };
+       diacritics.replacementList = replacementList;
+       diacritics.diacriticsMap = diacriticsMap;
 
-       var isArabic_1 = createCommonjsModule(function (module, exports) {
+       var lib = {};
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         var arabicBlocks = [[0x0600, 0x06FF], [0x0750, 0x077F], [0x08A0, 0x08FF], [0xFB50, 0xFDFF], [0xFE70, 0xFEFF], [0x10E60, 0x10E7F], [0x1EC70, 0x1ECBF], [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
-         ];
+       var isArabic$1 = {};
 
-         function isArabic(_char) {
-           if (_char.length > 1) {
-             // allow the newer chars?
-             throw new Error('isArabic works on only one-character strings');
-           }
+       Object.defineProperty(isArabic$1, "__esModule", {
+         value: true
+       });
+       var arabicBlocks = [[0x0600, 0x06FF], [0x0750, 0x077F], [0x08A0, 0x08FF], [0xFB50, 0xFDFF], [0xFE70, 0xFEFF], [0x10E60, 0x10E7F], [0x1EC70, 0x1ECBF], [0x1EE00, 0x1EEFF] // Mathematical Alphabetic symbols https://www.unicode.org/charts/PDF/U1EE00.pdf
+       ];
+
+       function isArabic(_char) {
+         if (_char.length > 1) {
+           // allow the newer chars?
+           throw new Error('isArabic works on only one-character strings');
+         }
 
-           var code = _char.charCodeAt(0);
+         var code = _char.charCodeAt(0);
 
-           for (var i = 0; i < arabicBlocks.length; i++) {
-             var block = arabicBlocks[i];
+         for (var i = 0; i < arabicBlocks.length; i++) {
+           var block = arabicBlocks[i];
 
-             if (code >= block[0] && code <= block[1]) {
-               return true;
-             }
+           if (code >= block[0] && code <= block[1]) {
+             return true;
            }
+         }
 
-           return false;
+         return false;
+       }
+
+       isArabic$1.isArabic = isArabic;
+
+       function isMath(_char2) {
+         if (_char2.length > 2) {
+           // allow the newer chars?
+           throw new Error('isMath works on only one-character strings');
          }
 
-         exports.isArabic = isArabic;
+         var code = _char2.charCodeAt(0);
 
-         function isMath(_char2) {
-           if (_char2.length > 2) {
-             // allow the newer chars?
-             throw new Error('isMath works on only one-character strings');
-           }
+         return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
+       }
 
-           var code = _char2.charCodeAt(0);
+       isArabic$1.isMath = isMath;
 
-           return code >= 0x660 && code <= 0x66C || code >= 0x6F0 && code <= 0x6F9;
-         }
+       var GlyphSplitter$1 = {};
 
-         exports.isMath = isMath;
-       });
+       var reference = {};
 
-       var unicodeArabic = createCommonjsModule(function (module, exports) {
+       var unicodeArabic = {};
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         var arabicReference = {
-           "alef": {
-             "normal": ["\u0627"],
-             "madda_above": {
-               "normal": ["\u0627\u0653", "\u0622"],
-               "isolated": "\uFE81",
-               "final": "\uFE82"
-             },
-             "hamza_above": {
-               "normal": ["\u0627\u0654", "\u0623"],
-               "isolated": "\uFE83",
-               "final": "\uFE84"
-             },
-             "hamza_below": {
-               "normal": ["\u0627\u0655", "\u0625"],
-               "isolated": "\uFE87",
-               "final": "\uFE88"
-             },
-             "wasla": {
-               "normal": "\u0671",
-               "isolated": "\uFB50",
-               "final": "\uFB51"
-             },
-             "wavy_hamza_above": ["\u0672"],
-             "wavy_hamza_below": ["\u0627\u065F", "\u0673"],
-             "high_hamza": ["\u0675", "\u0627\u0674"],
-             "indic_two_above": ["\u0773"],
-             "indic_three_above": ["\u0774"],
-             "fathatan": {
-               "normal": ["\u0627\u064B"],
-               "final": "\uFD3C",
-               "isolated": "\uFD3D"
-             },
-             "isolated": "\uFE8D",
-             "final": "\uFE8E"
-           },
-           "beh": {
-             "normal": ["\u0628"],
-             "dotless": ["\u066E"],
-             "three_dots_horizontally_below": ["\u0750"],
-             "dot_below_three_dots_above": ["\u0751"],
-             "three_dots_pointing_upwards_below": ["\u0752"],
-             "three_dots_pointing_upwards_below_two_dots_above": ["\u0753"],
-             "two_dots_below_dot_above": ["\u0754"],
-             "inverted_small_v_below": ["\u0755"],
-             "small_v": ["\u0756"],
-             "small_v_below": ["\u08A0"],
-             "hamza_above": ["\u08A1"],
-             "small_meem_above": ["\u08B6"],
-             "isolated": "\uFE8F",
-             "final": "\uFE90",
-             "initial": "\uFE91",
-             "medial": "\uFE92"
-           },
-           "teh marbuta": {
-             "normal": ["\u0629"],
-             "isolated": "\uFE93",
-             "final": "\uFE94"
-           },
-           "teh": {
-             "normal": ["\u062A"],
-             "ring": ["\u067C"],
-             "three_dots_above_downwards": ["\u067D"],
-             "small_teh_above": ["\u08B8"],
-             "isolated": "\uFE95",
-             "final": "\uFE96",
-             "initial": "\uFE97",
-             "medial": "\uFE98"
-           },
-           "theh": {
-             "normal": ["\u062B"],
-             "isolated": "\uFE99",
-             "final": "\uFE9A",
-             "initial": "\uFE9B",
-             "medial": "\uFE9C"
-           },
-           "jeem": {
-             "normal": ["\u062C"],
-             "two_dots_above": ["\u08A2"],
-             "isolated": "\uFE9D",
-             "final": "\uFE9E",
-             "initial": "\uFE9F",
-             "medial": "\uFEA0"
-           },
-           "hah": {
-             "normal": ["\u062D"],
-             "hamza_above": ["\u0681"],
-             "two_dots_vertical_above": ["\u0682"],
-             "three_dots_above": ["\u0685"],
-             "two_dots_above": ["\u0757"],
-             "three_dots_pointing_upwards_below": ["\u0758"],
-             "small_tah_below": ["\u076E"],
-             "small_tah_two_dots": ["\u076F"],
-             "small_tah_above": ["\u0772"],
-             "indic_four_below": ["\u077C"],
-             "isolated": "\uFEA1",
-             "final": "\uFEA2",
-             "initial": "\uFEA3",
-             "medial": "\uFEA4"
-           },
-           "khah": {
-             "normal": ["\u062E"],
-             "isolated": "\uFEA5",
-             "final": "\uFEA6",
-             "initial": "\uFEA7",
-             "medial": "\uFEA8"
-           },
-           "dal": {
-             "normal": ["\u062F"],
-             "ring": ["\u0689"],
-             "dot_below": ["\u068A"],
-             "dot_below_small_tah": ["\u068B"],
-             "three_dots_above_downwards": ["\u068F"],
-             "four_dots_above": ["\u0690"],
-             "inverted_v": ["\u06EE"],
-             "two_dots_vertically_below_small_tah": ["\u0759"],
-             "inverted_small_v_below": ["\u075A"],
-             "three_dots_below": ["\u08AE"],
-             "isolated": "\uFEA9",
-             "final": "\uFEAA"
-           },
-           "thal": {
-             "normal": ["\u0630"],
-             "isolated": "\uFEAB",
-             "final": "\uFEAC"
-           },
-           "reh": {
-             "normal": ["\u0631"],
-             "small_v": ["\u0692"],
-             "ring": ["\u0693"],
-             "dot_below": ["\u0694"],
-             "small_v_below": ["\u0695"],
-             "dot_below_dot_above": ["\u0696"],
-             "two_dots_above": ["\u0697"],
-             "four_dots_above": ["\u0699"],
-             "inverted_v": ["\u06EF"],
-             "stroke": ["\u075B"],
-             "two_dots_vertically_above": ["\u076B"],
-             "hamza_above": ["\u076C"],
-             "small_tah_two_dots": ["\u0771"],
-             "loop": ["\u08AA"],
-             "small_noon_above": ["\u08B9"],
-             "isolated": "\uFEAD",
-             "final": "\uFEAE"
-           },
-           "zain": {
-             "normal": ["\u0632"],
-             "inverted_v_above": ["\u08B2"],
-             "isolated": "\uFEAF",
-             "final": "\uFEB0"
-           },
-           "seen": {
-             "normal": ["\u0633"],
-             "dot_below_dot_above": ["\u069A"],
-             "three_dots_below": ["\u069B"],
-             "three_dots_below_three_dots_above": ["\u069C"],
-             "four_dots_above": ["\u075C"],
-             "two_dots_vertically_above": ["\u076D"],
-             "small_tah_two_dots": ["\u0770"],
-             "indic_four_above": ["\u077D"],
-             "inverted_v": ["\u077E"],
-             "isolated": "\uFEB1",
-             "final": "\uFEB2",
-             "initial": "\uFEB3",
-             "medial": "\uFEB4"
-           },
-           "sheen": {
-             "normal": ["\u0634"],
-             "dot_below": ["\u06FA"],
-             "isolated": "\uFEB5",
-             "final": "\uFEB6",
-             "initial": "\uFEB7",
-             "medial": "\uFEB8"
-           },
-           "sad": {
-             "normal": ["\u0635"],
-             "two_dots_below": ["\u069D"],
-             "three_dots_above": ["\u069E"],
-             "three_dots_below": ["\u08AF"],
-             "isolated": "\uFEB9",
-             "final": "\uFEBA",
-             "initial": "\uFEBB",
-             "medial": "\uFEBC"
-           },
-           "dad": {
-             "normal": ["\u0636"],
-             "dot_below": ["\u06FB"],
-             "isolated": "\uFEBD",
-             "final": "\uFEBE",
-             "initial": "\uFEBF",
-             "medial": "\uFEC0"
-           },
-           "tah": {
-             "normal": ["\u0637"],
-             "three_dots_above": ["\u069F"],
-             "two_dots_above": ["\u08A3"],
-             "isolated": "\uFEC1",
-             "final": "\uFEC2",
-             "initial": "\uFEC3",
-             "medial": "\uFEC4"
-           },
-           "zah": {
-             "normal": ["\u0638"],
-             "isolated": "\uFEC5",
-             "final": "\uFEC6",
-             "initial": "\uFEC7",
-             "medial": "\uFEC8"
-           },
-           "ain": {
-             "normal": ["\u0639"],
-             "three_dots_above": ["\u06A0"],
-             "two_dots_above": ["\u075D"],
-             "three_dots_pointing_downwards_above": ["\u075E"],
-             "two_dots_vertically_above": ["\u075F"],
-             "three_dots_below": ["\u08B3"],
-             "isolated": "\uFEC9",
-             "final": "\uFECA",
-             "initial": "\uFECB",
-             "medial": "\uFECC"
-           },
-           "ghain": {
-             "normal": ["\u063A"],
-             "dot_below": ["\u06FC"],
-             "isolated": "\uFECD",
-             "final": "\uFECE",
-             "initial": "\uFECF",
-             "medial": "\uFED0"
-           },
-           "feh": {
-             "normal": ["\u0641"],
-             "dotless": ["\u06A1"],
-             "dot_moved_below": ["\u06A2"],
-             "dot_below": ["\u06A3"],
-             "three_dots_below": ["\u06A5"],
-             "two_dots_below": ["\u0760"],
-             "three_dots_pointing_upwards_below": ["\u0761"],
-             "dot_below_three_dots_above": ["\u08A4"],
-             "isolated": "\uFED1",
-             "final": "\uFED2",
-             "initial": "\uFED3",
-             "medial": "\uFED4"
-           },
-           "qaf": {
-             "normal": ["\u0642"],
-             "dotless": ["\u066F"],
-             "dot_above": ["\u06A7"],
-             "three_dots_above": ["\u06A8"],
-             "dot_below": ["\u08A5"],
-             "isolated": "\uFED5",
-             "final": "\uFED6",
-             "initial": "\uFED7",
-             "medial": "\uFED8"
-           },
-           "kaf": {
-             "normal": ["\u0643"],
-             "swash": ["\u06AA"],
-             "ring": ["\u06AB"],
-             "dot_above": ["\u06AC"],
-             "three_dots_below": ["\u06AE"],
-             "two_dots_above": ["\u077F"],
-             "dot_below": ["\u08B4"],
-             "isolated": "\uFED9",
-             "final": "\uFEDA",
-             "initial": "\uFEDB",
-             "medial": "\uFEDC"
-           },
-           "lam": {
-             "normal": ["\u0644"],
-             "small_v": ["\u06B5"],
-             "dot_above": ["\u06B6"],
-             "three_dots_above": ["\u06B7"],
-             "three_dots_below": ["\u06B8"],
-             "bar": ["\u076A"],
-             "double_bar": ["\u08A6"],
-             "isolated": "\uFEDD",
-             "final": "\uFEDE",
-             "initial": "\uFEDF",
-             "medial": "\uFEE0"
-           },
-           "meem": {
-             "normal": ["\u0645"],
-             "dot_above": ["\u0765"],
-             "dot_below": ["\u0766"],
-             "three_dots_above": ["\u08A7"],
-             "isolated": "\uFEE1",
-             "final": "\uFEE2",
-             "initial": "\uFEE3",
-             "medial": "\uFEE4"
-           },
-           "noon": {
-             "normal": ["\u0646"],
-             "dot_below": ["\u06B9"],
-             "ring": ["\u06BC"],
-             "three_dots_above": ["\u06BD"],
-             "two_dots_below": ["\u0767"],
-             "small_tah": ["\u0768"],
-             "small_v": ["\u0769"],
-             "isolated": "\uFEE5",
-             "final": "\uFEE6",
-             "initial": "\uFEE7",
-             "medial": "\uFEE8"
-           },
-           "heh": {
-             "normal": ["\u0647"],
-             "isolated": "\uFEE9",
-             "final": "\uFEEA",
-             "initial": "\uFEEB",
-             "medial": "\uFEEC"
-           },
-           "waw": {
-             "normal": ["\u0648"],
-             "hamza_above": {
-               "normal": ["\u0624", "\u0648\u0654"],
-               "isolated": "\uFE85",
-               "final": "\uFE86"
-             },
-             "high_hamza": ["\u0676", "\u0648\u0674"],
-             "ring": ["\u06C4"],
-             "two_dots_above": ["\u06CA"],
-             "dot_above": ["\u06CF"],
-             "indic_two_above": ["\u0778"],
-             "indic_three_above": ["\u0779"],
-             "dot_within": ["\u08AB"],
-             "isolated": "\uFEED",
-             "final": "\uFEEE"
-           },
-           "alef_maksura": {
-             "normal": ["\u0649"],
-             "hamza_above": ["\u0626", "\u064A\u0654"],
-             "initial": "\uFBE8",
-             "medial": "\uFBE9",
-             "isolated": "\uFEEF",
-             "final": "\uFEF0"
-           },
-           "yeh": {
-             "normal": ["\u064A"],
-             "hamza_above": {
-               "normal": ["\u0626", "\u0649\u0654"],
-               "isolated": "\uFE89",
-               "final": "\uFE8A",
-               "initial": "\uFE8B",
-               "medial": "\uFE8C"
-             },
-             "two_dots_below_hamza_above": ["\u08A8"],
-             "high_hamza": ["\u0678", "\u064A\u0674"],
-             "tail": ["\u06CD"],
-             "small_v": ["\u06CE"],
-             "three_dots_below": ["\u06D1"],
-             "two_dots_below_dot_above": ["\u08A9"],
-             "two_dots_below_small_noon_above": ["\u08BA"],
-             "isolated": "\uFEF1",
-             "final": "\uFEF2",
-             "initial": "\uFEF3",
-             "medial": "\uFEF4"
-           },
-           "tteh": {
-             "normal": ["\u0679"],
-             "isolated": "\uFB66",
-             "final": "\uFB67",
-             "initial": "\uFB68",
-             "medial": "\uFB69"
-           },
-           "tteheh": {
-             "normal": ["\u067A"],
-             "isolated": "\uFB5E",
-             "final": "\uFB5F",
-             "initial": "\uFB60",
-             "medial": "\uFB61"
-           },
-           "beeh": {
-             "normal": ["\u067B"],
-             "isolated": "\uFB52",
-             "final": "\uFB53",
-             "initial": "\uFB54",
-             "medial": "\uFB55"
-           },
-           "peh": {
-             "normal": ["\u067E"],
-             "small_meem_above": ["\u08B7"],
-             "isolated": "\uFB56",
-             "final": "\uFB57",
-             "initial": "\uFB58",
-             "medial": "\uFB59"
-           },
-           "teheh": {
-             "normal": ["\u067F"],
-             "isolated": "\uFB62",
-             "final": "\uFB63",
-             "initial": "\uFB64",
-             "medial": "\uFB65"
-           },
-           "beheh": {
-             "normal": ["\u0680"],
-             "isolated": "\uFB5A",
-             "final": "\uFB5B",
-             "initial": "\uFB5C",
-             "medial": "\uFB5D"
-           },
-           "nyeh": {
-             "normal": ["\u0683"],
-             "isolated": "\uFB76",
-             "final": "\uFB77",
-             "initial": "\uFB78",
-             "medial": "\uFB79"
-           },
-           "dyeh": {
-             "normal": ["\u0684"],
-             "isolated": "\uFB72",
-             "final": "\uFB73",
-             "initial": "\uFB74",
-             "medial": "\uFB75"
-           },
-           "tcheh": {
-             "normal": ["\u0686"],
-             "dot_above": ["\u06BF"],
-             "isolated": "\uFB7A",
-             "final": "\uFB7B",
-             "initial": "\uFB7C",
-             "medial": "\uFB7D"
-           },
-           "tcheheh": {
-             "normal": ["\u0687"],
-             "isolated": "\uFB7E",
-             "final": "\uFB7F",
-             "initial": "\uFB80",
-             "medial": "\uFB81"
-           },
-           "ddal": {
-             "normal": ["\u0688"],
-             "isolated": "\uFB88",
-             "final": "\uFB89"
-           },
-           "dahal": {
-             "normal": ["\u068C"],
-             "isolated": "\uFB84",
-             "final": "\uFB85"
-           },
-           "ddahal": {
-             "normal": ["\u068D"],
-             "isolated": "\uFB82",
-             "final": "\uFB83"
-           },
-           "dul": {
-             "normal": ["\u068F", "\u068E"],
-             "isolated": "\uFB86",
-             "final": "\uFB87"
-           },
-           "rreh": {
-             "normal": ["\u0691"],
-             "isolated": "\uFB8C",
-             "final": "\uFB8D"
-           },
-           "jeh": {
-             "normal": ["\u0698"],
-             "isolated": "\uFB8A",
-             "final": "\uFB8B"
-           },
-           "veh": {
-             "normal": ["\u06A4"],
-             "isolated": "\uFB6A",
-             "final": "\uFB6B",
-             "initial": "\uFB6C",
-             "medial": "\uFB6D"
-           },
-           "peheh": {
-             "normal": ["\u06A6"],
-             "isolated": "\uFB6E",
-             "final": "\uFB6F",
-             "initial": "\uFB70",
-             "medial": "\uFB71"
-           },
-           "keheh": {
-             "normal": ["\u06A9"],
-             "dot_above": ["\u0762"],
-             "three_dots_above": ["\u0763"],
-             "three_dots_pointing_upwards_below": ["\u0764"],
-             "isolated": "\uFB8E",
-             "final": "\uFB8F",
-             "initial": "\uFB90",
-             "medial": "\uFB91"
-           },
-           "ng": {
-             "normal": ["\u06AD"],
-             "isolated": "\uFBD3",
-             "final": "\uFBD4",
-             "initial": "\uFBD5",
-             "medial": "\uFBD6"
-           },
-           "gaf": {
-             "normal": ["\u06AF"],
-             "ring": ["\u06B0"],
-             "two_dots_below": ["\u06B2"],
-             "three_dots_above": ["\u06B4"],
-             "inverted_stroke": ["\u08B0"],
-             "isolated": "\uFB92",
-             "final": "\uFB93",
-             "initial": "\uFB94",
-             "medial": "\uFB95"
-           },
-           "ngoeh": {
-             "normal": ["\u06B1"],
-             "isolated": "\uFB9A",
-             "final": "\uFB9B",
-             "initial": "\uFB9C",
-             "medial": "\uFB9D"
-           },
-           "gueh": {
-             "normal": ["\u06B3"],
-             "isolated": "\uFB96",
-             "final": "\uFB97",
-             "initial": "\uFB98",
-             "medial": "\uFB99"
-           },
-           "noon ghunna": {
-             "normal": ["\u06BA"],
-             "isolated": "\uFB9E",
-             "final": "\uFB9F"
-           },
-           "rnoon": {
-             "normal": ["\u06BB"],
-             "isolated": "\uFBA0",
-             "final": "\uFBA1",
-             "initial": "\uFBA2",
-             "medial": "\uFBA3"
-           },
-           "heh doachashmee": {
-             "normal": ["\u06BE"],
-             "isolated": "\uFBAA",
-             "final": "\uFBAB",
-             "initial": "\uFBAC",
-             "medial": "\uFBAD"
-           },
-           "heh goal": {
-             "normal": ["\u06C1"],
-             "hamza_above": ["\u06C1\u0654", "\u06C2"],
-             "isolated": "\uFBA6",
-             "final": "\uFBA7",
-             "initial": "\uFBA8",
-             "medial": "\uFBA9"
-           },
-           "teh marbuta goal": {
-             "normal": ["\u06C3"]
+       Object.defineProperty(unicodeArabic, "__esModule", {
+         value: true
+       });
+       var arabicReference = {
+         "alef": {
+           "normal": ["\u0627"],
+           "madda_above": {
+             "normal": ["\u0627\u0653", "\u0622"],
+             "isolated": "\uFE81",
+             "final": "\uFE82"
            },
-           "kirghiz oe": {
-             "normal": ["\u06C5"],
-             "isolated": "\uFBE0",
-             "final": "\uFBE1"
+           "hamza_above": {
+             "normal": ["\u0627\u0654", "\u0623"],
+             "isolated": "\uFE83",
+             "final": "\uFE84"
            },
-           "oe": {
-             "normal": ["\u06C6"],
-             "isolated": "\uFBD9",
-             "final": "\uFBDA"
+           "hamza_below": {
+             "normal": ["\u0627\u0655", "\u0625"],
+             "isolated": "\uFE87",
+             "final": "\uFE88"
            },
-           "u": {
-             "normal": ["\u06C7"],
-             "hamza_above": {
-               "normal": ["\u0677", "\u06C7\u0674"],
-               "isolated": "\uFBDD"
-             },
-             "isolated": "\uFBD7",
-             "final": "\uFBD8"
+           "wasla": {
+             "normal": "\u0671",
+             "isolated": "\uFB50",
+             "final": "\uFB51"
            },
-           "yu": {
-             "normal": ["\u06C8"],
-             "isolated": "\uFBDB",
-             "final": "\uFBDC"
+           "wavy_hamza_above": ["\u0672"],
+           "wavy_hamza_below": ["\u0627\u065F", "\u0673"],
+           "high_hamza": ["\u0675", "\u0627\u0674"],
+           "indic_two_above": ["\u0773"],
+           "indic_three_above": ["\u0774"],
+           "fathatan": {
+             "normal": ["\u0627\u064B"],
+             "final": "\uFD3C",
+             "isolated": "\uFD3D"
            },
-           "kirghiz yu": {
-             "normal": ["\u06C9"],
-             "isolated": "\uFBE2",
-             "final": "\uFBE3"
+           "isolated": "\uFE8D",
+           "final": "\uFE8E"
+         },
+         "beh": {
+           "normal": ["\u0628"],
+           "dotless": ["\u066E"],
+           "three_dots_horizontally_below": ["\u0750"],
+           "dot_below_three_dots_above": ["\u0751"],
+           "three_dots_pointing_upwards_below": ["\u0752"],
+           "three_dots_pointing_upwards_below_two_dots_above": ["\u0753"],
+           "two_dots_below_dot_above": ["\u0754"],
+           "inverted_small_v_below": ["\u0755"],
+           "small_v": ["\u0756"],
+           "small_v_below": ["\u08A0"],
+           "hamza_above": ["\u08A1"],
+           "small_meem_above": ["\u08B6"],
+           "isolated": "\uFE8F",
+           "final": "\uFE90",
+           "initial": "\uFE91",
+           "medial": "\uFE92"
+         },
+         "teh marbuta": {
+           "normal": ["\u0629"],
+           "isolated": "\uFE93",
+           "final": "\uFE94"
+         },
+         "teh": {
+           "normal": ["\u062A"],
+           "ring": ["\u067C"],
+           "three_dots_above_downwards": ["\u067D"],
+           "small_teh_above": ["\u08B8"],
+           "isolated": "\uFE95",
+           "final": "\uFE96",
+           "initial": "\uFE97",
+           "medial": "\uFE98"
+         },
+         "theh": {
+           "normal": ["\u062B"],
+           "isolated": "\uFE99",
+           "final": "\uFE9A",
+           "initial": "\uFE9B",
+           "medial": "\uFE9C"
+         },
+         "jeem": {
+           "normal": ["\u062C"],
+           "two_dots_above": ["\u08A2"],
+           "isolated": "\uFE9D",
+           "final": "\uFE9E",
+           "initial": "\uFE9F",
+           "medial": "\uFEA0"
+         },
+         "hah": {
+           "normal": ["\u062D"],
+           "hamza_above": ["\u0681"],
+           "two_dots_vertical_above": ["\u0682"],
+           "three_dots_above": ["\u0685"],
+           "two_dots_above": ["\u0757"],
+           "three_dots_pointing_upwards_below": ["\u0758"],
+           "small_tah_below": ["\u076E"],
+           "small_tah_two_dots": ["\u076F"],
+           "small_tah_above": ["\u0772"],
+           "indic_four_below": ["\u077C"],
+           "isolated": "\uFEA1",
+           "final": "\uFEA2",
+           "initial": "\uFEA3",
+           "medial": "\uFEA4"
+         },
+         "khah": {
+           "normal": ["\u062E"],
+           "isolated": "\uFEA5",
+           "final": "\uFEA6",
+           "initial": "\uFEA7",
+           "medial": "\uFEA8"
+         },
+         "dal": {
+           "normal": ["\u062F"],
+           "ring": ["\u0689"],
+           "dot_below": ["\u068A"],
+           "dot_below_small_tah": ["\u068B"],
+           "three_dots_above_downwards": ["\u068F"],
+           "four_dots_above": ["\u0690"],
+           "inverted_v": ["\u06EE"],
+           "two_dots_vertically_below_small_tah": ["\u0759"],
+           "inverted_small_v_below": ["\u075A"],
+           "three_dots_below": ["\u08AE"],
+           "isolated": "\uFEA9",
+           "final": "\uFEAA"
+         },
+         "thal": {
+           "normal": ["\u0630"],
+           "isolated": "\uFEAB",
+           "final": "\uFEAC"
+         },
+         "reh": {
+           "normal": ["\u0631"],
+           "small_v": ["\u0692"],
+           "ring": ["\u0693"],
+           "dot_below": ["\u0694"],
+           "small_v_below": ["\u0695"],
+           "dot_below_dot_above": ["\u0696"],
+           "two_dots_above": ["\u0697"],
+           "four_dots_above": ["\u0699"],
+           "inverted_v": ["\u06EF"],
+           "stroke": ["\u075B"],
+           "two_dots_vertically_above": ["\u076B"],
+           "hamza_above": ["\u076C"],
+           "small_tah_two_dots": ["\u0771"],
+           "loop": ["\u08AA"],
+           "small_noon_above": ["\u08B9"],
+           "isolated": "\uFEAD",
+           "final": "\uFEAE"
+         },
+         "zain": {
+           "normal": ["\u0632"],
+           "inverted_v_above": ["\u08B2"],
+           "isolated": "\uFEAF",
+           "final": "\uFEB0"
+         },
+         "seen": {
+           "normal": ["\u0633"],
+           "dot_below_dot_above": ["\u069A"],
+           "three_dots_below": ["\u069B"],
+           "three_dots_below_three_dots_above": ["\u069C"],
+           "four_dots_above": ["\u075C"],
+           "two_dots_vertically_above": ["\u076D"],
+           "small_tah_two_dots": ["\u0770"],
+           "indic_four_above": ["\u077D"],
+           "inverted_v": ["\u077E"],
+           "isolated": "\uFEB1",
+           "final": "\uFEB2",
+           "initial": "\uFEB3",
+           "medial": "\uFEB4"
+         },
+         "sheen": {
+           "normal": ["\u0634"],
+           "dot_below": ["\u06FA"],
+           "isolated": "\uFEB5",
+           "final": "\uFEB6",
+           "initial": "\uFEB7",
+           "medial": "\uFEB8"
+         },
+         "sad": {
+           "normal": ["\u0635"],
+           "two_dots_below": ["\u069D"],
+           "three_dots_above": ["\u069E"],
+           "three_dots_below": ["\u08AF"],
+           "isolated": "\uFEB9",
+           "final": "\uFEBA",
+           "initial": "\uFEBB",
+           "medial": "\uFEBC"
+         },
+         "dad": {
+           "normal": ["\u0636"],
+           "dot_below": ["\u06FB"],
+           "isolated": "\uFEBD",
+           "final": "\uFEBE",
+           "initial": "\uFEBF",
+           "medial": "\uFEC0"
+         },
+         "tah": {
+           "normal": ["\u0637"],
+           "three_dots_above": ["\u069F"],
+           "two_dots_above": ["\u08A3"],
+           "isolated": "\uFEC1",
+           "final": "\uFEC2",
+           "initial": "\uFEC3",
+           "medial": "\uFEC4"
+         },
+         "zah": {
+           "normal": ["\u0638"],
+           "isolated": "\uFEC5",
+           "final": "\uFEC6",
+           "initial": "\uFEC7",
+           "medial": "\uFEC8"
+         },
+         "ain": {
+           "normal": ["\u0639"],
+           "three_dots_above": ["\u06A0"],
+           "two_dots_above": ["\u075D"],
+           "three_dots_pointing_downwards_above": ["\u075E"],
+           "two_dots_vertically_above": ["\u075F"],
+           "three_dots_below": ["\u08B3"],
+           "isolated": "\uFEC9",
+           "final": "\uFECA",
+           "initial": "\uFECB",
+           "medial": "\uFECC"
+         },
+         "ghain": {
+           "normal": ["\u063A"],
+           "dot_below": ["\u06FC"],
+           "isolated": "\uFECD",
+           "final": "\uFECE",
+           "initial": "\uFECF",
+           "medial": "\uFED0"
+         },
+         "feh": {
+           "normal": ["\u0641"],
+           "dotless": ["\u06A1"],
+           "dot_moved_below": ["\u06A2"],
+           "dot_below": ["\u06A3"],
+           "three_dots_below": ["\u06A5"],
+           "two_dots_below": ["\u0760"],
+           "three_dots_pointing_upwards_below": ["\u0761"],
+           "dot_below_three_dots_above": ["\u08A4"],
+           "isolated": "\uFED1",
+           "final": "\uFED2",
+           "initial": "\uFED3",
+           "medial": "\uFED4"
+         },
+         "qaf": {
+           "normal": ["\u0642"],
+           "dotless": ["\u066F"],
+           "dot_above": ["\u06A7"],
+           "three_dots_above": ["\u06A8"],
+           "dot_below": ["\u08A5"],
+           "isolated": "\uFED5",
+           "final": "\uFED6",
+           "initial": "\uFED7",
+           "medial": "\uFED8"
+         },
+         "kaf": {
+           "normal": ["\u0643"],
+           "swash": ["\u06AA"],
+           "ring": ["\u06AB"],
+           "dot_above": ["\u06AC"],
+           "three_dots_below": ["\u06AE"],
+           "two_dots_above": ["\u077F"],
+           "dot_below": ["\u08B4"],
+           "isolated": "\uFED9",
+           "final": "\uFEDA",
+           "initial": "\uFEDB",
+           "medial": "\uFEDC"
+         },
+         "lam": {
+           "normal": ["\u0644"],
+           "small_v": ["\u06B5"],
+           "dot_above": ["\u06B6"],
+           "three_dots_above": ["\u06B7"],
+           "three_dots_below": ["\u06B8"],
+           "bar": ["\u076A"],
+           "double_bar": ["\u08A6"],
+           "isolated": "\uFEDD",
+           "final": "\uFEDE",
+           "initial": "\uFEDF",
+           "medial": "\uFEE0"
+         },
+         "meem": {
+           "normal": ["\u0645"],
+           "dot_above": ["\u0765"],
+           "dot_below": ["\u0766"],
+           "three_dots_above": ["\u08A7"],
+           "isolated": "\uFEE1",
+           "final": "\uFEE2",
+           "initial": "\uFEE3",
+           "medial": "\uFEE4"
+         },
+         "noon": {
+           "normal": ["\u0646"],
+           "dot_below": ["\u06B9"],
+           "ring": ["\u06BC"],
+           "three_dots_above": ["\u06BD"],
+           "two_dots_below": ["\u0767"],
+           "small_tah": ["\u0768"],
+           "small_v": ["\u0769"],
+           "isolated": "\uFEE5",
+           "final": "\uFEE6",
+           "initial": "\uFEE7",
+           "medial": "\uFEE8"
+         },
+         "heh": {
+           "normal": ["\u0647"],
+           "isolated": "\uFEE9",
+           "final": "\uFEEA",
+           "initial": "\uFEEB",
+           "medial": "\uFEEC"
+         },
+         "waw": {
+           "normal": ["\u0648"],
+           "hamza_above": {
+             "normal": ["\u0624", "\u0648\u0654"],
+             "isolated": "\uFE85",
+             "final": "\uFE86"
            },
-           "ve": {
-             "normal": ["\u06CB"],
-             "isolated": "\uFBDE",
-             "final": "\uFBDF"
+           "high_hamza": ["\u0676", "\u0648\u0674"],
+           "ring": ["\u06C4"],
+           "two_dots_above": ["\u06CA"],
+           "dot_above": ["\u06CF"],
+           "indic_two_above": ["\u0778"],
+           "indic_three_above": ["\u0779"],
+           "dot_within": ["\u08AB"],
+           "isolated": "\uFEED",
+           "final": "\uFEEE"
+         },
+         "alef_maksura": {
+           "normal": ["\u0649"],
+           "hamza_above": ["\u0626", "\u064A\u0654"],
+           "initial": "\uFBE8",
+           "medial": "\uFBE9",
+           "isolated": "\uFEEF",
+           "final": "\uFEF0"
+         },
+         "yeh": {
+           "normal": ["\u064A"],
+           "hamza_above": {
+             "normal": ["\u0626", "\u0649\u0654"],
+             "isolated": "\uFE89",
+             "final": "\uFE8A",
+             "initial": "\uFE8B",
+             "medial": "\uFE8C"
            },
-           "farsi yeh": {
-             "normal": ["\u06CC"],
-             "indic_two_above": ["\u0775"],
-             "indic_three_above": ["\u0776"],
-             "indic_four_above": ["\u0777"],
-             "isolated": "\uFBFC",
-             "final": "\uFBFD",
-             "initial": "\uFBFE",
-             "medial": "\uFBFF"
+           "two_dots_below_hamza_above": ["\u08A8"],
+           "high_hamza": ["\u0678", "\u064A\u0674"],
+           "tail": ["\u06CD"],
+           "small_v": ["\u06CE"],
+           "three_dots_below": ["\u06D1"],
+           "two_dots_below_dot_above": ["\u08A9"],
+           "two_dots_below_small_noon_above": ["\u08BA"],
+           "isolated": "\uFEF1",
+           "final": "\uFEF2",
+           "initial": "\uFEF3",
+           "medial": "\uFEF4"
+         },
+         "tteh": {
+           "normal": ["\u0679"],
+           "isolated": "\uFB66",
+           "final": "\uFB67",
+           "initial": "\uFB68",
+           "medial": "\uFB69"
+         },
+         "tteheh": {
+           "normal": ["\u067A"],
+           "isolated": "\uFB5E",
+           "final": "\uFB5F",
+           "initial": "\uFB60",
+           "medial": "\uFB61"
+         },
+         "beeh": {
+           "normal": ["\u067B"],
+           "isolated": "\uFB52",
+           "final": "\uFB53",
+           "initial": "\uFB54",
+           "medial": "\uFB55"
+         },
+         "peh": {
+           "normal": ["\u067E"],
+           "small_meem_above": ["\u08B7"],
+           "isolated": "\uFB56",
+           "final": "\uFB57",
+           "initial": "\uFB58",
+           "medial": "\uFB59"
+         },
+         "teheh": {
+           "normal": ["\u067F"],
+           "isolated": "\uFB62",
+           "final": "\uFB63",
+           "initial": "\uFB64",
+           "medial": "\uFB65"
+         },
+         "beheh": {
+           "normal": ["\u0680"],
+           "isolated": "\uFB5A",
+           "final": "\uFB5B",
+           "initial": "\uFB5C",
+           "medial": "\uFB5D"
+         },
+         "nyeh": {
+           "normal": ["\u0683"],
+           "isolated": "\uFB76",
+           "final": "\uFB77",
+           "initial": "\uFB78",
+           "medial": "\uFB79"
+         },
+         "dyeh": {
+           "normal": ["\u0684"],
+           "isolated": "\uFB72",
+           "final": "\uFB73",
+           "initial": "\uFB74",
+           "medial": "\uFB75"
+         },
+         "tcheh": {
+           "normal": ["\u0686"],
+           "dot_above": ["\u06BF"],
+           "isolated": "\uFB7A",
+           "final": "\uFB7B",
+           "initial": "\uFB7C",
+           "medial": "\uFB7D"
+         },
+         "tcheheh": {
+           "normal": ["\u0687"],
+           "isolated": "\uFB7E",
+           "final": "\uFB7F",
+           "initial": "\uFB80",
+           "medial": "\uFB81"
+         },
+         "ddal": {
+           "normal": ["\u0688"],
+           "isolated": "\uFB88",
+           "final": "\uFB89"
+         },
+         "dahal": {
+           "normal": ["\u068C"],
+           "isolated": "\uFB84",
+           "final": "\uFB85"
+         },
+         "ddahal": {
+           "normal": ["\u068D"],
+           "isolated": "\uFB82",
+           "final": "\uFB83"
+         },
+         "dul": {
+           "normal": ["\u068F", "\u068E"],
+           "isolated": "\uFB86",
+           "final": "\uFB87"
+         },
+         "rreh": {
+           "normal": ["\u0691"],
+           "isolated": "\uFB8C",
+           "final": "\uFB8D"
+         },
+         "jeh": {
+           "normal": ["\u0698"],
+           "isolated": "\uFB8A",
+           "final": "\uFB8B"
+         },
+         "veh": {
+           "normal": ["\u06A4"],
+           "isolated": "\uFB6A",
+           "final": "\uFB6B",
+           "initial": "\uFB6C",
+           "medial": "\uFB6D"
+         },
+         "peheh": {
+           "normal": ["\u06A6"],
+           "isolated": "\uFB6E",
+           "final": "\uFB6F",
+           "initial": "\uFB70",
+           "medial": "\uFB71"
+         },
+         "keheh": {
+           "normal": ["\u06A9"],
+           "dot_above": ["\u0762"],
+           "three_dots_above": ["\u0763"],
+           "three_dots_pointing_upwards_below": ["\u0764"],
+           "isolated": "\uFB8E",
+           "final": "\uFB8F",
+           "initial": "\uFB90",
+           "medial": "\uFB91"
+         },
+         "ng": {
+           "normal": ["\u06AD"],
+           "isolated": "\uFBD3",
+           "final": "\uFBD4",
+           "initial": "\uFBD5",
+           "medial": "\uFBD6"
+         },
+         "gaf": {
+           "normal": ["\u06AF"],
+           "ring": ["\u06B0"],
+           "two_dots_below": ["\u06B2"],
+           "three_dots_above": ["\u06B4"],
+           "inverted_stroke": ["\u08B0"],
+           "isolated": "\uFB92",
+           "final": "\uFB93",
+           "initial": "\uFB94",
+           "medial": "\uFB95"
+         },
+         "ngoeh": {
+           "normal": ["\u06B1"],
+           "isolated": "\uFB9A",
+           "final": "\uFB9B",
+           "initial": "\uFB9C",
+           "medial": "\uFB9D"
+         },
+         "gueh": {
+           "normal": ["\u06B3"],
+           "isolated": "\uFB96",
+           "final": "\uFB97",
+           "initial": "\uFB98",
+           "medial": "\uFB99"
+         },
+         "noon ghunna": {
+           "normal": ["\u06BA"],
+           "isolated": "\uFB9E",
+           "final": "\uFB9F"
+         },
+         "rnoon": {
+           "normal": ["\u06BB"],
+           "isolated": "\uFBA0",
+           "final": "\uFBA1",
+           "initial": "\uFBA2",
+           "medial": "\uFBA3"
+         },
+         "heh doachashmee": {
+           "normal": ["\u06BE"],
+           "isolated": "\uFBAA",
+           "final": "\uFBAB",
+           "initial": "\uFBAC",
+           "medial": "\uFBAD"
+         },
+         "heh goal": {
+           "normal": ["\u06C1"],
+           "hamza_above": ["\u06C1\u0654", "\u06C2"],
+           "isolated": "\uFBA6",
+           "final": "\uFBA7",
+           "initial": "\uFBA8",
+           "medial": "\uFBA9"
+         },
+         "teh marbuta goal": {
+           "normal": ["\u06C3"]
+         },
+         "kirghiz oe": {
+           "normal": ["\u06C5"],
+           "isolated": "\uFBE0",
+           "final": "\uFBE1"
+         },
+         "oe": {
+           "normal": ["\u06C6"],
+           "isolated": "\uFBD9",
+           "final": "\uFBDA"
+         },
+         "u": {
+           "normal": ["\u06C7"],
+           "hamza_above": {
+             "normal": ["\u0677", "\u06C7\u0674"],
+             "isolated": "\uFBDD"
            },
-           "e": {
-             "normal": ["\u06D0"],
-             "isolated": "\uFBE4",
-             "final": "\uFBE5",
-             "initial": "\uFBE6",
-             "medial": "\uFBE7"
+           "isolated": "\uFBD7",
+           "final": "\uFBD8"
+         },
+         "yu": {
+           "normal": ["\u06C8"],
+           "isolated": "\uFBDB",
+           "final": "\uFBDC"
+         },
+         "kirghiz yu": {
+           "normal": ["\u06C9"],
+           "isolated": "\uFBE2",
+           "final": "\uFBE3"
+         },
+         "ve": {
+           "normal": ["\u06CB"],
+           "isolated": "\uFBDE",
+           "final": "\uFBDF"
+         },
+         "farsi yeh": {
+           "normal": ["\u06CC"],
+           "indic_two_above": ["\u0775"],
+           "indic_three_above": ["\u0776"],
+           "indic_four_above": ["\u0777"],
+           "isolated": "\uFBFC",
+           "final": "\uFBFD",
+           "initial": "\uFBFE",
+           "medial": "\uFBFF"
+         },
+         "e": {
+           "normal": ["\u06D0"],
+           "isolated": "\uFBE4",
+           "final": "\uFBE5",
+           "initial": "\uFBE6",
+           "medial": "\uFBE7"
+         },
+         "yeh barree": {
+           "normal": ["\u06D2"],
+           "hamza_above": {
+             "normal": ["\u06D2\u0654", "\u06D3"],
+             "isolated": "\uFBB0",
+             "final": "\uFBB1"
            },
-           "yeh barree": {
-             "normal": ["\u06D2"],
-             "hamza_above": {
-               "normal": ["\u06D2\u0654", "\u06D3"],
-               "isolated": "\uFBB0",
-               "final": "\uFBB1"
-             },
-             "indic_two_above": ["\u077A"],
-             "indic_three_above": ["\u077B"],
-             "isolated": "\uFBAE",
-             "final": "\uFBAF"
+           "indic_two_above": ["\u077A"],
+           "indic_three_above": ["\u077B"],
+           "isolated": "\uFBAE",
+           "final": "\uFBAF"
+         },
+         "ae": {
+           "normal": ["\u06D5"],
+           "isolated": "\u06D5",
+           "final": "\uFEEA",
+           "yeh_above": {
+             "normal": ["\u06C0", "\u06D5\u0654"],
+             "isolated": "\uFBA4",
+             "final": "\uFBA5"
+           }
+         },
+         "rohingya yeh": {
+           "normal": ["\u08AC"]
+         },
+         "low alef": {
+           "normal": ["\u08AD"]
+         },
+         "straight waw": {
+           "normal": ["\u08B1"]
+         },
+         "african feh": {
+           "normal": ["\u08BB"]
+         },
+         "african qaf": {
+           "normal": ["\u08BC"]
+         },
+         "african noon": {
+           "normal": ["\u08BD"]
+         }
+       };
+
+       unicodeArabic["default"] = arabicReference;
+
+       var unicodeLigatures = {};
+
+       Object.defineProperty(unicodeLigatures, "__esModule", {
+         value: true
+       });
+       var ligatureReference = {
+         "\u0626\u0627": {
+           "isolated": "\uFBEA",
+           "final": "\uFBEB"
+         },
+         "\u0626\u06D5": {
+           "isolated": "\uFBEC",
+           "final": "\uFBED"
+         },
+         "\u0626\u0648": {
+           "isolated": "\uFBEE",
+           "final": "\uFBEF"
+         },
+         "\u0626\u06C7": {
+           "isolated": "\uFBF0",
+           "final": "\uFBF1"
+         },
+         "\u0626\u06C6": {
+           "isolated": "\uFBF2",
+           "final": "\uFBF3"
+         },
+         "\u0626\u06C8": {
+           "isolated": "\uFBF4",
+           "final": "\uFBF5"
+         },
+         "\u0626\u06D0": {
+           "isolated": "\uFBF6",
+           "final": "\uFBF7",
+           "initial": "\uFBF8"
+         },
+         "\u0626\u0649": {
+           "uighur_kirghiz": {
+             "isolated": "\uFBF9",
+             "final": "\uFBFA",
+             "initial": "\uFBFB"
            },
-           "ae": {
-             "normal": ["\u06D5"],
-             "isolated": "\u06D5",
-             "final": "\uFEEA",
-             "yeh_above": {
-               "normal": ["\u06C0", "\u06D5\u0654"],
-               "isolated": "\uFBA4",
-               "final": "\uFBA5"
+           "isolated": "\uFC03",
+           "final": "\uFC68"
+         },
+         "\u0626\u062C": {
+           "isolated": "\uFC00",
+           "initial": "\uFC97"
+         },
+         "\u0626\u062D": {
+           "isolated": "\uFC01",
+           "initial": "\uFC98"
+         },
+         "\u0626\u0645": {
+           "isolated": "\uFC02",
+           "final": "\uFC66",
+           "initial": "\uFC9A",
+           "medial": "\uFCDF"
+         },
+         "\u0626\u064A": {
+           "isolated": "\uFC04",
+           "final": "\uFC69"
+         },
+         "\u0628\u062C": {
+           "isolated": "\uFC05",
+           "initial": "\uFC9C"
+         },
+         "\u0628\u062D": {
+           "isolated": "\uFC06",
+           "initial": "\uFC9D"
+         },
+         "\u0628\u062E": {
+           "isolated": "\uFC07",
+           "initial": "\uFC9E"
+         },
+         "\u0628\u0645": {
+           "isolated": "\uFC08",
+           "final": "\uFC6C",
+           "initial": "\uFC9F",
+           "medial": "\uFCE1"
+         },
+         "\u0628\u0649": {
+           "isolated": "\uFC09",
+           "final": "\uFC6E"
+         },
+         "\u0628\u064A": {
+           "isolated": "\uFC0A",
+           "final": "\uFC6F"
+         },
+         "\u062A\u062C": {
+           "isolated": "\uFC0B",
+           "initial": "\uFCA1"
+         },
+         "\u062A\u062D": {
+           "isolated": "\uFC0C",
+           "initial": "\uFCA2"
+         },
+         "\u062A\u062E": {
+           "isolated": "\uFC0D",
+           "initial": "\uFCA3"
+         },
+         "\u062A\u0645": {
+           "isolated": "\uFC0E",
+           "final": "\uFC72",
+           "initial": "\uFCA4",
+           "medial": "\uFCE3"
+         },
+         "\u062A\u0649": {
+           "isolated": "\uFC0F",
+           "final": "\uFC74"
+         },
+         "\u062A\u064A": {
+           "isolated": "\uFC10",
+           "final": "\uFC75"
+         },
+         "\u062B\u062C": {
+           "isolated": "\uFC11"
+         },
+         "\u062B\u0645": {
+           "isolated": "\uFC12",
+           "final": "\uFC78",
+           "initial": "\uFCA6",
+           "medial": "\uFCE5"
+         },
+         "\u062B\u0649": {
+           "isolated": "\uFC13",
+           "final": "\uFC7A"
+         },
+         "\u062B\u0648": {
+           "isolated": "\uFC14"
+         },
+         "\u062C\u062D": {
+           "isolated": "\uFC15",
+           "initial": "\uFCA7"
+         },
+         "\u062C\u0645": {
+           "isolated": "\uFC16",
+           "initial": "\uFCA8"
+         },
+         "\u062D\u062C": {
+           "isolated": "\uFC17",
+           "initial": "\uFCA9"
+         },
+         "\u062D\u0645": {
+           "isolated": "\uFC18",
+           "initial": "\uFCAA"
+         },
+         "\u062E\u062C": {
+           "isolated": "\uFC19",
+           "initial": "\uFCAB"
+         },
+         "\u062E\u062D": {
+           "isolated": "\uFC1A"
+         },
+         "\u062E\u0645": {
+           "isolated": "\uFC1B",
+           "initial": "\uFCAC"
+         },
+         "\u0633\u062C": {
+           "isolated": "\uFC1C",
+           "initial": "\uFCAD",
+           "medial": "\uFD34"
+         },
+         "\u0633\u062D": {
+           "isolated": "\uFC1D",
+           "initial": "\uFCAE",
+           "medial": "\uFD35"
+         },
+         "\u0633\u062E": {
+           "isolated": "\uFC1E",
+           "initial": "\uFCAF",
+           "medial": "\uFD36"
+         },
+         "\u0633\u0645": {
+           "isolated": "\uFC1F",
+           "initial": "\uFCB0",
+           "medial": "\uFCE7"
+         },
+         "\u0635\u062D": {
+           "isolated": "\uFC20",
+           "initial": "\uFCB1"
+         },
+         "\u0635\u0645": {
+           "isolated": "\uFC21",
+           "initial": "\uFCB3"
+         },
+         "\u0636\u062C": {
+           "isolated": "\uFC22",
+           "initial": "\uFCB4"
+         },
+         "\u0636\u062D": {
+           "isolated": "\uFC23",
+           "initial": "\uFCB5"
+         },
+         "\u0636\u062E": {
+           "isolated": "\uFC24",
+           "initial": "\uFCB6"
+         },
+         "\u0636\u0645": {
+           "isolated": "\uFC25",
+           "initial": "\uFCB7"
+         },
+         "\u0637\u062D": {
+           "isolated": "\uFC26",
+           "initial": "\uFCB8"
+         },
+         "\u0637\u0645": {
+           "isolated": "\uFC27",
+           "initial": "\uFD33",
+           "medial": "\uFD3A"
+         },
+         "\u0638\u0645": {
+           "isolated": "\uFC28",
+           "initial": "\uFCB9",
+           "medial": "\uFD3B"
+         },
+         "\u0639\u062C": {
+           "isolated": "\uFC29",
+           "initial": "\uFCBA"
+         },
+         "\u0639\u0645": {
+           "isolated": "\uFC2A",
+           "initial": "\uFCBB"
+         },
+         "\u063A\u062C": {
+           "isolated": "\uFC2B",
+           "initial": "\uFCBC"
+         },
+         "\u063A\u0645": {
+           "isolated": "\uFC2C",
+           "initial": "\uFCBD"
+         },
+         "\u0641\u062C": {
+           "isolated": "\uFC2D",
+           "initial": "\uFCBE"
+         },
+         "\u0641\u062D": {
+           "isolated": "\uFC2E",
+           "initial": "\uFCBF"
+         },
+         "\u0641\u062E": {
+           "isolated": "\uFC2F",
+           "initial": "\uFCC0"
+         },
+         "\u0641\u0645": {
+           "isolated": "\uFC30",
+           "initial": "\uFCC1"
+         },
+         "\u0641\u0649": {
+           "isolated": "\uFC31",
+           "final": "\uFC7C"
+         },
+         "\u0641\u064A": {
+           "isolated": "\uFC32",
+           "final": "\uFC7D"
+         },
+         "\u0642\u062D": {
+           "isolated": "\uFC33",
+           "initial": "\uFCC2"
+         },
+         "\u0642\u0645": {
+           "isolated": "\uFC34",
+           "initial": "\uFCC3"
+         },
+         "\u0642\u0649": {
+           "isolated": "\uFC35",
+           "final": "\uFC7E"
+         },
+         "\u0642\u064A": {
+           "isolated": "\uFC36",
+           "final": "\uFC7F"
+         },
+         "\u0643\u0627": {
+           "isolated": "\uFC37",
+           "final": "\uFC80"
+         },
+         "\u0643\u062C": {
+           "isolated": "\uFC38",
+           "initial": "\uFCC4"
+         },
+         "\u0643\u062D": {
+           "isolated": "\uFC39",
+           "initial": "\uFCC5"
+         },
+         "\u0643\u062E": {
+           "isolated": "\uFC3A",
+           "initial": "\uFCC6"
+         },
+         "\u0643\u0644": {
+           "isolated": "\uFC3B",
+           "final": "\uFC81",
+           "initial": "\uFCC7",
+           "medial": "\uFCEB"
+         },
+         "\u0643\u0645": {
+           "isolated": "\uFC3C",
+           "final": "\uFC82",
+           "initial": "\uFCC8",
+           "medial": "\uFCEC"
+         },
+         "\u0643\u0649": {
+           "isolated": "\uFC3D",
+           "final": "\uFC83"
+         },
+         "\u0643\u064A": {
+           "isolated": "\uFC3E",
+           "final": "\uFC84"
+         },
+         "\u0644\u062C": {
+           "isolated": "\uFC3F",
+           "initial": "\uFCC9"
+         },
+         "\u0644\u062D": {
+           "isolated": "\uFC40",
+           "initial": "\uFCCA"
+         },
+         "\u0644\u062E": {
+           "isolated": "\uFC41",
+           "initial": "\uFCCB"
+         },
+         "\u0644\u0645": {
+           "isolated": "\uFC42",
+           "final": "\uFC85",
+           "initial": "\uFCCC",
+           "medial": "\uFCED"
+         },
+         "\u0644\u0649": {
+           "isolated": "\uFC43",
+           "final": "\uFC86"
+         },
+         "\u0644\u064A": {
+           "isolated": "\uFC44",
+           "final": "\uFC87"
+         },
+         "\u0645\u062C": {
+           "isolated": "\uFC45",
+           "initial": "\uFCCE"
+         },
+         "\u0645\u062D": {
+           "isolated": "\uFC46",
+           "initial": "\uFCCF"
+         },
+         "\u0645\u062E": {
+           "isolated": "\uFC47",
+           "initial": "\uFCD0"
+         },
+         "\u0645\u0645": {
+           "isolated": "\uFC48",
+           "final": "\uFC89",
+           "initial": "\uFCD1"
+         },
+         "\u0645\u0649": {
+           "isolated": "\uFC49"
+         },
+         "\u0645\u064A": {
+           "isolated": "\uFC4A"
+         },
+         "\u0646\u062C": {
+           "isolated": "\uFC4B",
+           "initial": "\uFCD2"
+         },
+         "\u0646\u062D": {
+           "isolated": "\uFC4C",
+           "initial": "\uFCD3"
+         },
+         "\u0646\u062E": {
+           "isolated": "\uFC4D",
+           "initial": "\uFCD4"
+         },
+         "\u0646\u0645": {
+           "isolated": "\uFC4E",
+           "final": "\uFC8C",
+           "initial": "\uFCD5",
+           "medial": "\uFCEE"
+         },
+         "\u0646\u0649": {
+           "isolated": "\uFC4F",
+           "final": "\uFC8E"
+         },
+         "\u0646\u064A": {
+           "isolated": "\uFC50",
+           "final": "\uFC8F"
+         },
+         "\u0647\u062C": {
+           "isolated": "\uFC51",
+           "initial": "\uFCD7"
+         },
+         "\u0647\u0645": {
+           "isolated": "\uFC52",
+           "initial": "\uFCD8"
+         },
+         "\u0647\u0649": {
+           "isolated": "\uFC53"
+         },
+         "\u0647\u064A": {
+           "isolated": "\uFC54"
+         },
+         "\u064A\u062C": {
+           "isolated": "\uFC55",
+           "initial": "\uFCDA"
+         },
+         "\u064A\u062D": {
+           "isolated": "\uFC56",
+           "initial": "\uFCDB"
+         },
+         "\u064A\u062E": {
+           "isolated": "\uFC57",
+           "initial": "\uFCDC"
+         },
+         "\u064A\u0645": {
+           "isolated": "\uFC58",
+           "final": "\uFC93",
+           "initial": "\uFCDD",
+           "medial": "\uFCF0"
+         },
+         "\u064A\u0649": {
+           "isolated": "\uFC59",
+           "final": "\uFC95"
+         },
+         "\u064A\u064A": {
+           "isolated": "\uFC5A",
+           "final": "\uFC96"
+         },
+         "\u0630\u0670": {
+           "isolated": "\uFC5B"
+         },
+         "\u0631\u0670": {
+           "isolated": "\uFC5C"
+         },
+         "\u0649\u0670": {
+           "isolated": "\uFC5D",
+           "final": "\uFC90"
+         },
+         "\u064C\u0651": {
+           "isolated": "\uFC5E"
+         },
+         "\u064D\u0651": {
+           "isolated": "\uFC5F"
+         },
+         "\u064E\u0651": {
+           "isolated": "\uFC60"
+         },
+         "\u064F\u0651": {
+           "isolated": "\uFC61"
+         },
+         "\u0650\u0651": {
+           "isolated": "\uFC62"
+         },
+         "\u0651\u0670": {
+           "isolated": "\uFC63"
+         },
+         "\u0626\u0631": {
+           "final": "\uFC64"
+         },
+         "\u0626\u0632": {
+           "final": "\uFC65"
+         },
+         "\u0626\u0646": {
+           "final": "\uFC67"
+         },
+         "\u0628\u0631": {
+           "final": "\uFC6A"
+         },
+         "\u0628\u0632": {
+           "final": "\uFC6B"
+         },
+         "\u0628\u0646": {
+           "final": "\uFC6D"
+         },
+         "\u062A\u0631": {
+           "final": "\uFC70"
+         },
+         "\u062A\u0632": {
+           "final": "\uFC71"
+         },
+         "\u062A\u0646": {
+           "final": "\uFC73"
+         },
+         "\u062B\u0631": {
+           "final": "\uFC76"
+         },
+         "\u062B\u0632": {
+           "final": "\uFC77"
+         },
+         "\u062B\u0646": {
+           "final": "\uFC79"
+         },
+         "\u062B\u064A": {
+           "final": "\uFC7B"
+         },
+         "\u0645\u0627": {
+           "final": "\uFC88"
+         },
+         "\u0646\u0631": {
+           "final": "\uFC8A"
+         },
+         "\u0646\u0632": {
+           "final": "\uFC8B"
+         },
+         "\u0646\u0646": {
+           "final": "\uFC8D"
+         },
+         "\u064A\u0631": {
+           "final": "\uFC91"
+         },
+         "\u064A\u0632": {
+           "final": "\uFC92"
+         },
+         "\u064A\u0646": {
+           "final": "\uFC94"
+         },
+         "\u0626\u062E": {
+           "initial": "\uFC99"
+         },
+         "\u0626\u0647": {
+           "initial": "\uFC9B",
+           "medial": "\uFCE0"
+         },
+         "\u0628\u0647": {
+           "initial": "\uFCA0",
+           "medial": "\uFCE2"
+         },
+         "\u062A\u0647": {
+           "initial": "\uFCA5",
+           "medial": "\uFCE4"
+         },
+         "\u0635\u062E": {
+           "initial": "\uFCB2"
+         },
+         "\u0644\u0647": {
+           "initial": "\uFCCD"
+         },
+         "\u0646\u0647": {
+           "initial": "\uFCD6",
+           "medial": "\uFCEF"
+         },
+         "\u0647\u0670": {
+           "initial": "\uFCD9"
+         },
+         "\u064A\u0647": {
+           "initial": "\uFCDE",
+           "medial": "\uFCF1"
+         },
+         "\u062B\u0647": {
+           "medial": "\uFCE6"
+         },
+         "\u0633\u0647": {
+           "medial": "\uFCE8",
+           "initial": "\uFD31"
+         },
+         "\u0634\u0645": {
+           "medial": "\uFCE9",
+           "isolated": "\uFD0C",
+           "final": "\uFD28",
+           "initial": "\uFD30"
+         },
+         "\u0634\u0647": {
+           "medial": "\uFCEA",
+           "initial": "\uFD32"
+         },
+         "\u0640\u064E\u0651": {
+           "medial": "\uFCF2"
+         },
+         "\u0640\u064F\u0651": {
+           "medial": "\uFCF3"
+         },
+         "\u0640\u0650\u0651": {
+           "medial": "\uFCF4"
+         },
+         "\u0637\u0649": {
+           "isolated": "\uFCF5",
+           "final": "\uFD11"
+         },
+         "\u0637\u064A": {
+           "isolated": "\uFCF6",
+           "final": "\uFD12"
+         },
+         "\u0639\u0649": {
+           "isolated": "\uFCF7",
+           "final": "\uFD13"
+         },
+         "\u0639\u064A": {
+           "isolated": "\uFCF8",
+           "final": "\uFD14"
+         },
+         "\u063A\u0649": {
+           "isolated": "\uFCF9",
+           "final": "\uFD15"
+         },
+         "\u063A\u064A": {
+           "isolated": "\uFCFA",
+           "final": "\uFD16"
+         },
+         "\u0633\u0649": {
+           "isolated": "\uFCFB"
+         },
+         "\u0633\u064A": {
+           "isolated": "\uFCFC",
+           "final": "\uFD18"
+         },
+         "\u0634\u0649": {
+           "isolated": "\uFCFD",
+           "final": "\uFD19"
+         },
+         "\u0634\u064A": {
+           "isolated": "\uFCFE",
+           "final": "\uFD1A"
+         },
+         "\u062D\u0649": {
+           "isolated": "\uFCFF",
+           "final": "\uFD1B"
+         },
+         "\u062D\u064A": {
+           "isolated": "\uFD00",
+           "final": "\uFD1C"
+         },
+         "\u062C\u0649": {
+           "isolated": "\uFD01",
+           "final": "\uFD1D"
+         },
+         "\u062C\u064A": {
+           "isolated": "\uFD02",
+           "final": "\uFD1E"
+         },
+         "\u062E\u0649": {
+           "isolated": "\uFD03",
+           "final": "\uFD1F"
+         },
+         "\u062E\u064A": {
+           "isolated": "\uFD04",
+           "final": "\uFD20"
+         },
+         "\u0635\u0649": {
+           "isolated": "\uFD05",
+           "final": "\uFD21"
+         },
+         "\u0635\u064A": {
+           "isolated": "\uFD06",
+           "final": "\uFD22"
+         },
+         "\u0636\u0649": {
+           "isolated": "\uFD07",
+           "final": "\uFD23"
+         },
+         "\u0636\u064A": {
+           "isolated": "\uFD08",
+           "final": "\uFD24"
+         },
+         "\u0634\u062C": {
+           "isolated": "\uFD09",
+           "final": "\uFD25",
+           "initial": "\uFD2D",
+           "medial": "\uFD37"
+         },
+         "\u0634\u062D": {
+           "isolated": "\uFD0A",
+           "final": "\uFD26",
+           "initial": "\uFD2E",
+           "medial": "\uFD38"
+         },
+         "\u0634\u062E": {
+           "isolated": "\uFD0B",
+           "final": "\uFD27",
+           "initial": "\uFD2F",
+           "medial": "\uFD39"
+         },
+         "\u0634\u0631": {
+           "isolated": "\uFD0D",
+           "final": "\uFD29"
+         },
+         "\u0633\u0631": {
+           "isolated": "\uFD0E",
+           "final": "\uFD2A"
+         },
+         "\u0635\u0631": {
+           "isolated": "\uFD0F",
+           "final": "\uFD2B"
+         },
+         "\u0636\u0631": {
+           "isolated": "\uFD10",
+           "final": "\uFD2C"
+         },
+         "\u0633\u0639": {
+           "final": "\uFD17"
+         },
+         "\u062A\u062C\u0645": {
+           "initial": "\uFD50"
+         },
+         "\u062A\u062D\u062C": {
+           "final": "\uFD51",
+           "initial": "\uFD52"
+         },
+         "\u062A\u062D\u0645": {
+           "initial": "\uFD53"
+         },
+         "\u062A\u062E\u0645": {
+           "initial": "\uFD54"
+         },
+         "\u062A\u0645\u062C": {
+           "initial": "\uFD55"
+         },
+         "\u062A\u0645\u062D": {
+           "initial": "\uFD56"
+         },
+         "\u062A\u0645\u062E": {
+           "initial": "\uFD57"
+         },
+         "\u062C\u0645\u062D": {
+           "final": "\uFD58",
+           "initial": "\uFD59"
+         },
+         "\u062D\u0645\u064A": {
+           "final": "\uFD5A"
+         },
+         "\u062D\u0645\u0649": {
+           "final": "\uFD5B"
+         },
+         "\u0633\u062D\u062C": {
+           "initial": "\uFD5C"
+         },
+         "\u0633\u062C\u062D": {
+           "initial": "\uFD5D"
+         },
+         "\u0633\u062C\u0649": {
+           "final": "\uFD5E"
+         },
+         "\u0633\u0645\u062D": {
+           "final": "\uFD5F",
+           "initial": "\uFD60"
+         },
+         "\u0633\u0645\u062C": {
+           "initial": "\uFD61"
+         },
+         "\u0633\u0645\u0645": {
+           "final": "\uFD62",
+           "initial": "\uFD63"
+         },
+         "\u0635\u062D\u062D": {
+           "final": "\uFD64",
+           "initial": "\uFD65"
+         },
+         "\u0635\u0645\u0645": {
+           "final": "\uFD66",
+           "initial": "\uFDC5"
+         },
+         "\u0634\u062D\u0645": {
+           "final": "\uFD67",
+           "initial": "\uFD68"
+         },
+         "\u0634\u062C\u064A": {
+           "final": "\uFD69"
+         },
+         "\u0634\u0645\u062E": {
+           "final": "\uFD6A",
+           "initial": "\uFD6B"
+         },
+         "\u0634\u0645\u0645": {
+           "final": "\uFD6C",
+           "initial": "\uFD6D"
+         },
+         "\u0636\u062D\u0649": {
+           "final": "\uFD6E"
+         },
+         "\u0636\u062E\u0645": {
+           "final": "\uFD6F",
+           "initial": "\uFD70"
+         },
+         "\u0636\u0645\u062D": {
+           "final": "\uFD71"
+         },
+         "\u0637\u0645\u062D": {
+           "initial": "\uFD72"
+         },
+         "\u0637\u0645\u0645": {
+           "initial": "\uFD73"
+         },
+         "\u0637\u0645\u064A": {
+           "final": "\uFD74"
+         },
+         "\u0639\u062C\u0645": {
+           "final": "\uFD75",
+           "initial": "\uFDC4"
+         },
+         "\u0639\u0645\u0645": {
+           "final": "\uFD76",
+           "initial": "\uFD77"
+         },
+         "\u0639\u0645\u0649": {
+           "final": "\uFD78"
+         },
+         "\u063A\u0645\u0645": {
+           "final": "\uFD79"
+         },
+         "\u063A\u0645\u064A": {
+           "final": "\uFD7A"
+         },
+         "\u063A\u0645\u0649": {
+           "final": "\uFD7B"
+         },
+         "\u0641\u062E\u0645": {
+           "final": "\uFD7C",
+           "initial": "\uFD7D"
+         },
+         "\u0642\u0645\u062D": {
+           "final": "\uFD7E",
+           "initial": "\uFDB4"
+         },
+         "\u0642\u0645\u0645": {
+           "final": "\uFD7F"
+         },
+         "\u0644\u062D\u0645": {
+           "final": "\uFD80",
+           "initial": "\uFDB5"
+         },
+         "\u0644\u062D\u064A": {
+           "final": "\uFD81"
+         },
+         "\u0644\u062D\u0649": {
+           "final": "\uFD82"
+         },
+         "\u0644\u062C\u062C": {
+           "initial": "\uFD83",
+           "final": "\uFD84"
+         },
+         "\u0644\u062E\u0645": {
+           "final": "\uFD85",
+           "initial": "\uFD86"
+         },
+         "\u0644\u0645\u062D": {
+           "final": "\uFD87",
+           "initial": "\uFD88"
+         },
+         "\u0645\u062D\u062C": {
+           "initial": "\uFD89"
+         },
+         "\u0645\u062D\u0645": {
+           "initial": "\uFD8A"
+         },
+         "\u0645\u062D\u064A": {
+           "final": "\uFD8B"
+         },
+         "\u0645\u062C\u062D": {
+           "initial": "\uFD8C"
+         },
+         "\u0645\u062C\u0645": {
+           "initial": "\uFD8D"
+         },
+         "\u0645\u062E\u062C": {
+           "initial": "\uFD8E"
+         },
+         "\u0645\u062E\u0645": {
+           "initial": "\uFD8F"
+         },
+         "\u0645\u062C\u062E": {
+           "initial": "\uFD92"
+         },
+         "\u0647\u0645\u062C": {
+           "initial": "\uFD93"
+         },
+         "\u0647\u0645\u0645": {
+           "initial": "\uFD94"
+         },
+         "\u0646\u062D\u0645": {
+           "initial": "\uFD95"
+         },
+         "\u0646\u062D\u0649": {
+           "final": "\uFD96"
+         },
+         "\u0646\u062C\u0645": {
+           "final": "\uFD97",
+           "initial": "\uFD98"
+         },
+         "\u0646\u062C\u0649": {
+           "final": "\uFD99"
+         },
+         "\u0646\u0645\u064A": {
+           "final": "\uFD9A"
+         },
+         "\u0646\u0645\u0649": {
+           "final": "\uFD9B"
+         },
+         "\u064A\u0645\u0645": {
+           "final": "\uFD9C",
+           "initial": "\uFD9D"
+         },
+         "\u0628\u062E\u064A": {
+           "final": "\uFD9E"
+         },
+         "\u062A\u062C\u064A": {
+           "final": "\uFD9F"
+         },
+         "\u062A\u062C\u0649": {
+           "final": "\uFDA0"
+         },
+         "\u062A\u062E\u064A": {
+           "final": "\uFDA1"
+         },
+         "\u062A\u062E\u0649": {
+           "final": "\uFDA2"
+         },
+         "\u062A\u0645\u064A": {
+           "final": "\uFDA3"
+         },
+         "\u062A\u0645\u0649": {
+           "final": "\uFDA4"
+         },
+         "\u062C\u0645\u064A": {
+           "final": "\uFDA5"
+         },
+         "\u062C\u062D\u0649": {
+           "final": "\uFDA6"
+         },
+         "\u062C\u0645\u0649": {
+           "final": "\uFDA7"
+         },
+         "\u0633\u062E\u0649": {
+           "final": "\uFDA8"
+         },
+         "\u0635\u062D\u064A": {
+           "final": "\uFDA9"
+         },
+         "\u0634\u062D\u064A": {
+           "final": "\uFDAA"
+         },
+         "\u0636\u062D\u064A": {
+           "final": "\uFDAB"
+         },
+         "\u0644\u062C\u064A": {
+           "final": "\uFDAC"
+         },
+         "\u0644\u0645\u064A": {
+           "final": "\uFDAD"
+         },
+         "\u064A\u062D\u064A": {
+           "final": "\uFDAE"
+         },
+         "\u064A\u062C\u064A": {
+           "final": "\uFDAF"
+         },
+         "\u064A\u0645\u064A": {
+           "final": "\uFDB0"
+         },
+         "\u0645\u0645\u064A": {
+           "final": "\uFDB1"
+         },
+         "\u0642\u0645\u064A": {
+           "final": "\uFDB2"
+         },
+         "\u0646\u062D\u064A": {
+           "final": "\uFDB3"
+         },
+         "\u0639\u0645\u064A": {
+           "final": "\uFDB6"
+         },
+         "\u0643\u0645\u064A": {
+           "final": "\uFDB7"
+         },
+         "\u0646\u062C\u062D": {
+           "initial": "\uFDB8",
+           "final": "\uFDBD"
+         },
+         "\u0645\u062E\u064A": {
+           "final": "\uFDB9"
+         },
+         "\u0644\u062C\u0645": {
+           "initial": "\uFDBA",
+           "final": "\uFDBC"
+         },
+         "\u0643\u0645\u0645": {
+           "final": "\uFDBB",
+           "initial": "\uFDC3"
+         },
+         "\u062C\u062D\u064A": {
+           "final": "\uFDBE"
+         },
+         "\u062D\u062C\u064A": {
+           "final": "\uFDBF"
+         },
+         "\u0645\u062C\u064A": {
+           "final": "\uFDC0"
+         },
+         "\u0641\u0645\u064A": {
+           "final": "\uFDC1"
+         },
+         "\u0628\u062D\u064A": {
+           "final": "\uFDC2"
+         },
+         "\u0633\u062E\u064A": {
+           "final": "\uFDC6"
+         },
+         "\u0646\u062C\u064A": {
+           "final": "\uFDC7"
+         },
+         "\u0644\u0622": {
+           "isolated": "\uFEF5",
+           "final": "\uFEF6"
+         },
+         "\u0644\u0623": {
+           "isolated": "\uFEF7",
+           "final": "\uFEF8"
+         },
+         "\u0644\u0625": {
+           "isolated": "\uFEF9",
+           "final": "\uFEFA"
+         },
+         "\u0644\u0627": {
+           "isolated": "\uFEFB",
+           "final": "\uFEFC"
+         },
+         "words": {
+           "\u0635\u0644\u06D2": "\uFDF0",
+           "\u0642\u0644\u06D2": "\uFDF1",
+           "\u0627\u0644\u0644\u0647": "\uFDF2",
+           "\u0627\u0643\u0628\u0631": "\uFDF3",
+           "\u0645\u062D\u0645\u062F": "\uFDF4",
+           "\u0635\u0644\u0639\u0645": "\uFDF5",
+           "\u0631\u0633\u0648\u0644": "\uFDF6",
+           "\u0639\u0644\u064A\u0647": "\uFDF7",
+           "\u0648\u0633\u0644\u0645": "\uFDF8",
+           "\u0635\u0644\u0649": "\uFDF9",
+           "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
+           "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
+           "\u0631\u06CC\u0627\u0644": "\uFDFC"
+         }
+       };
+
+       unicodeLigatures["default"] = ligatureReference;
+
+       Object.defineProperty(reference, "__esModule", {
+         value: true
+       });
+       var unicode_arabic_1$3 = unicodeArabic;
+       var unicode_ligatures_1$2 = unicodeLigatures;
+       var letterList = Object.keys(unicode_arabic_1$3["default"]);
+       reference.letterList = letterList;
+       var ligatureList = Object.keys(unicode_ligatures_1$2["default"]);
+       reference.ligatureList = ligatureList;
+       var ligatureWordList = Object.keys(unicode_ligatures_1$2["default"].words);
+       reference.ligatureWordList = ligatureWordList;
+       var lams = "\u0644\u06B5\u06B6\u06B7\u06B8";
+       reference.lams = lams;
+       var alefs = "\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774";
+       reference.alefs = alefs; // for (var l = 1; l < lams.length; l++) {
+       //   console.log('-');
+       //   for (var a = 0; a < alefs.length; a++) {
+       //     console.log(a + ': ' + lams[l] + alefs[a]);
+       //   }
+       // }
+
+       var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
+       reference.tashkeel = tashkeel;
+
+       function addToTashkeel(start, finish) {
+         for (var i = start; i <= finish; i++) {
+           reference.tashkeel = tashkeel += String.fromCharCode(i);
+         }
+       }
+
+       addToTashkeel(0x0610, 0x061A);
+       addToTashkeel(0x064B, 0x065F);
+       addToTashkeel(0x06D6, 0x06DC);
+       addToTashkeel(0x06E0, 0x06E4);
+       addToTashkeel(0x06EA, 0x06ED);
+       addToTashkeel(0x08D3, 0x08E1);
+       addToTashkeel(0x08E3, 0x08FF);
+       addToTashkeel(0xFE70, 0xFE7F);
+       var lineBreakers = "\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9";
+       reference.lineBreakers = lineBreakers;
+
+       function addToLineBreakers(start, finish) {
+         for (var i = start; i <= finish; i++) {
+           reference.lineBreakers = lineBreakers += String.fromCharCode(i);
+         }
+       }
+
+       addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
+
+       addToLineBreakers(0x0621, 0x0625);
+       addToLineBreakers(0x062F, 0x0632);
+       addToLineBreakers(0x0660, 0x066D); // numerals, math
+
+       addToLineBreakers(0x0671, 0x0677);
+       addToLineBreakers(0x0688, 0x0699);
+       addToLineBreakers(0x06C3, 0x06CB);
+       addToLineBreakers(0x06D2, 0x06F9);
+       addToLineBreakers(0x0759, 0x075B);
+       addToLineBreakers(0x08AA, 0x08AE);
+       addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
+       // Presentation Forms A includes diacritics but they are meant to stand alone
+
+       addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
+       // numerals, math
+
+       addToLineBreakers(0x10E60, 0x10E7F);
+       addToLineBreakers(0x1EC70, 0x1ECBF);
+       addToLineBreakers(0x1EE00, 0x1EEFF);
+
+       Object.defineProperty(GlyphSplitter$1, "__esModule", {
+         value: true
+       });
+       var isArabic_1$6 = isArabic$1;
+       var reference_1$5 = reference;
+
+       function GlyphSplitter(word) {
+         var letters = [];
+         var lastLetter = '';
+         word.split('').forEach(function (letter) {
+           if (isArabic_1$6.isArabic(letter)) {
+             if (reference_1$5.tashkeel.indexOf(letter) > -1) {
+               letters[letters.length - 1] += letter;
+             } else if (lastLetter.length && (reference_1$5.lams.indexOf(lastLetter) === 0 && reference_1$5.alefs.indexOf(letter) > -1 || reference_1$5.lams.indexOf(lastLetter) > 0 && reference_1$5.alefs.indexOf(letter) === 0)) {
+               // valid LA forms
+               letters[letters.length - 1] += letter;
+             } else {
+               letters.push(letter);
              }
-           },
-           "rohingya yeh": {
-             "normal": ["\u08AC"]
-           },
-           "low alef": {
-             "normal": ["\u08AD"]
-           },
-           "straight waw": {
-             "normal": ["\u08B1"]
-           },
-           "african feh": {
-             "normal": ["\u08BB"]
-           },
-           "african qaf": {
-             "normal": ["\u08BC"]
-           },
-           "african noon": {
-             "normal": ["\u08BD"]
+           } else {
+             letters.push(letter);
            }
-         };
-         exports["default"] = arabicReference;
-       });
 
-       var unicodeLigatures = createCommonjsModule(function (module, exports) {
+           if (reference_1$5.tashkeel.indexOf(letter) === -1) {
+             lastLetter = letter;
+           }
+         });
+         return letters;
+       }
+
+       GlyphSplitter$1.GlyphSplitter = GlyphSplitter;
+
+       var BaselineSplitter$1 = {};
+
+       Object.defineProperty(BaselineSplitter$1, "__esModule", {
+         value: true
+       });
+       var isArabic_1$5 = isArabic$1;
+       var reference_1$4 = reference;
+
+       function BaselineSplitter(word) {
+         var letters = [];
+         var lastLetter = '';
+         word.split('').forEach(function (letter) {
+           if (isArabic_1$5.isArabic(letter) && isArabic_1$5.isArabic(lastLetter)) {
+             if (lastLetter.length && reference_1$4.tashkeel.indexOf(letter) > -1) {
+               letters[letters.length - 1] += letter;
+             } else if (reference_1$4.lineBreakers.indexOf(lastLetter) > -1) {
+               letters.push(letter);
+             } else {
+               letters[letters.length - 1] += letter;
+             }
+           } else {
+             letters.push(letter);
+           }
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         var ligatureReference = {
-           "\u0626\u0627": {
-             "isolated": "\uFBEA",
-             "final": "\uFBEB"
-           },
-           "\u0626\u06D5": {
-             "isolated": "\uFBEC",
-             "final": "\uFBED"
-           },
-           "\u0626\u0648": {
-             "isolated": "\uFBEE",
-             "final": "\uFBEF"
-           },
-           "\u0626\u06C7": {
-             "isolated": "\uFBF0",
-             "final": "\uFBF1"
-           },
-           "\u0626\u06C6": {
-             "isolated": "\uFBF2",
-             "final": "\uFBF3"
-           },
-           "\u0626\u06C8": {
-             "isolated": "\uFBF4",
-             "final": "\uFBF5"
-           },
-           "\u0626\u06D0": {
-             "isolated": "\uFBF6",
-             "final": "\uFBF7",
-             "initial": "\uFBF8"
-           },
-           "\u0626\u0649": {
-             "uighur_kirghiz": {
-               "isolated": "\uFBF9",
-               "final": "\uFBFA",
-               "initial": "\uFBFB"
-             },
-             "isolated": "\uFC03",
-             "final": "\uFC68"
-           },
-           "\u0626\u062C": {
-             "isolated": "\uFC00",
-             "initial": "\uFC97"
-           },
-           "\u0626\u062D": {
-             "isolated": "\uFC01",
-             "initial": "\uFC98"
-           },
-           "\u0626\u0645": {
-             "isolated": "\uFC02",
-             "final": "\uFC66",
-             "initial": "\uFC9A",
-             "medial": "\uFCDF"
-           },
-           "\u0626\u064A": {
-             "isolated": "\uFC04",
-             "final": "\uFC69"
-           },
-           "\u0628\u062C": {
-             "isolated": "\uFC05",
-             "initial": "\uFC9C"
-           },
-           "\u0628\u062D": {
-             "isolated": "\uFC06",
-             "initial": "\uFC9D"
-           },
-           "\u0628\u062E": {
-             "isolated": "\uFC07",
-             "initial": "\uFC9E"
-           },
-           "\u0628\u0645": {
-             "isolated": "\uFC08",
-             "final": "\uFC6C",
-             "initial": "\uFC9F",
-             "medial": "\uFCE1"
-           },
-           "\u0628\u0649": {
-             "isolated": "\uFC09",
-             "final": "\uFC6E"
-           },
-           "\u0628\u064A": {
-             "isolated": "\uFC0A",
-             "final": "\uFC6F"
-           },
-           "\u062A\u062C": {
-             "isolated": "\uFC0B",
-             "initial": "\uFCA1"
-           },
-           "\u062A\u062D": {
-             "isolated": "\uFC0C",
-             "initial": "\uFCA2"
-           },
-           "\u062A\u062E": {
-             "isolated": "\uFC0D",
-             "initial": "\uFCA3"
-           },
-           "\u062A\u0645": {
-             "isolated": "\uFC0E",
-             "final": "\uFC72",
-             "initial": "\uFCA4",
-             "medial": "\uFCE3"
-           },
-           "\u062A\u0649": {
-             "isolated": "\uFC0F",
-             "final": "\uFC74"
-           },
-           "\u062A\u064A": {
-             "isolated": "\uFC10",
-             "final": "\uFC75"
-           },
-           "\u062B\u062C": {
-             "isolated": "\uFC11"
-           },
-           "\u062B\u0645": {
-             "isolated": "\uFC12",
-             "final": "\uFC78",
-             "initial": "\uFCA6",
-             "medial": "\uFCE5"
-           },
-           "\u062B\u0649": {
-             "isolated": "\uFC13",
-             "final": "\uFC7A"
-           },
-           "\u062B\u0648": {
-             "isolated": "\uFC14"
-           },
-           "\u062C\u062D": {
-             "isolated": "\uFC15",
-             "initial": "\uFCA7"
-           },
-           "\u062C\u0645": {
-             "isolated": "\uFC16",
-             "initial": "\uFCA8"
-           },
-           "\u062D\u062C": {
-             "isolated": "\uFC17",
-             "initial": "\uFCA9"
-           },
-           "\u062D\u0645": {
-             "isolated": "\uFC18",
-             "initial": "\uFCAA"
-           },
-           "\u062E\u062C": {
-             "isolated": "\uFC19",
-             "initial": "\uFCAB"
-           },
-           "\u062E\u062D": {
-             "isolated": "\uFC1A"
-           },
-           "\u062E\u0645": {
-             "isolated": "\uFC1B",
-             "initial": "\uFCAC"
-           },
-           "\u0633\u062C": {
-             "isolated": "\uFC1C",
-             "initial": "\uFCAD",
-             "medial": "\uFD34"
-           },
-           "\u0633\u062D": {
-             "isolated": "\uFC1D",
-             "initial": "\uFCAE",
-             "medial": "\uFD35"
-           },
-           "\u0633\u062E": {
-             "isolated": "\uFC1E",
-             "initial": "\uFCAF",
-             "medial": "\uFD36"
-           },
-           "\u0633\u0645": {
-             "isolated": "\uFC1F",
-             "initial": "\uFCB0",
-             "medial": "\uFCE7"
-           },
-           "\u0635\u062D": {
-             "isolated": "\uFC20",
-             "initial": "\uFCB1"
-           },
-           "\u0635\u0645": {
-             "isolated": "\uFC21",
-             "initial": "\uFCB3"
-           },
-           "\u0636\u062C": {
-             "isolated": "\uFC22",
-             "initial": "\uFCB4"
-           },
-           "\u0636\u062D": {
-             "isolated": "\uFC23",
-             "initial": "\uFCB5"
-           },
-           "\u0636\u062E": {
-             "isolated": "\uFC24",
-             "initial": "\uFCB6"
-           },
-           "\u0636\u0645": {
-             "isolated": "\uFC25",
-             "initial": "\uFCB7"
-           },
-           "\u0637\u062D": {
-             "isolated": "\uFC26",
-             "initial": "\uFCB8"
-           },
-           "\u0637\u0645": {
-             "isolated": "\uFC27",
-             "initial": "\uFD33",
-             "medial": "\uFD3A"
-           },
-           "\u0638\u0645": {
-             "isolated": "\uFC28",
-             "initial": "\uFCB9",
-             "medial": "\uFD3B"
-           },
-           "\u0639\u062C": {
-             "isolated": "\uFC29",
-             "initial": "\uFCBA"
-           },
-           "\u0639\u0645": {
-             "isolated": "\uFC2A",
-             "initial": "\uFCBB"
-           },
-           "\u063A\u062C": {
-             "isolated": "\uFC2B",
-             "initial": "\uFCBC"
-           },
-           "\u063A\u0645": {
-             "isolated": "\uFC2C",
-             "initial": "\uFCBD"
-           },
-           "\u0641\u062C": {
-             "isolated": "\uFC2D",
-             "initial": "\uFCBE"
-           },
-           "\u0641\u062D": {
-             "isolated": "\uFC2E",
-             "initial": "\uFCBF"
-           },
-           "\u0641\u062E": {
-             "isolated": "\uFC2F",
-             "initial": "\uFCC0"
-           },
-           "\u0641\u0645": {
-             "isolated": "\uFC30",
-             "initial": "\uFCC1"
-           },
-           "\u0641\u0649": {
-             "isolated": "\uFC31",
-             "final": "\uFC7C"
-           },
-           "\u0641\u064A": {
-             "isolated": "\uFC32",
-             "final": "\uFC7D"
-           },
-           "\u0642\u062D": {
-             "isolated": "\uFC33",
-             "initial": "\uFCC2"
-           },
-           "\u0642\u0645": {
-             "isolated": "\uFC34",
-             "initial": "\uFCC3"
-           },
-           "\u0642\u0649": {
-             "isolated": "\uFC35",
-             "final": "\uFC7E"
-           },
-           "\u0642\u064A": {
-             "isolated": "\uFC36",
-             "final": "\uFC7F"
-           },
-           "\u0643\u0627": {
-             "isolated": "\uFC37",
-             "final": "\uFC80"
-           },
-           "\u0643\u062C": {
-             "isolated": "\uFC38",
-             "initial": "\uFCC4"
-           },
-           "\u0643\u062D": {
-             "isolated": "\uFC39",
-             "initial": "\uFCC5"
-           },
-           "\u0643\u062E": {
-             "isolated": "\uFC3A",
-             "initial": "\uFCC6"
-           },
-           "\u0643\u0644": {
-             "isolated": "\uFC3B",
-             "final": "\uFC81",
-             "initial": "\uFCC7",
-             "medial": "\uFCEB"
-           },
-           "\u0643\u0645": {
-             "isolated": "\uFC3C",
-             "final": "\uFC82",
-             "initial": "\uFCC8",
-             "medial": "\uFCEC"
-           },
-           "\u0643\u0649": {
-             "isolated": "\uFC3D",
-             "final": "\uFC83"
-           },
-           "\u0643\u064A": {
-             "isolated": "\uFC3E",
-             "final": "\uFC84"
-           },
-           "\u0644\u062C": {
-             "isolated": "\uFC3F",
-             "initial": "\uFCC9"
-           },
-           "\u0644\u062D": {
-             "isolated": "\uFC40",
-             "initial": "\uFCCA"
-           },
-           "\u0644\u062E": {
-             "isolated": "\uFC41",
-             "initial": "\uFCCB"
-           },
-           "\u0644\u0645": {
-             "isolated": "\uFC42",
-             "final": "\uFC85",
-             "initial": "\uFCCC",
-             "medial": "\uFCED"
-           },
-           "\u0644\u0649": {
-             "isolated": "\uFC43",
-             "final": "\uFC86"
-           },
-           "\u0644\u064A": {
-             "isolated": "\uFC44",
-             "final": "\uFC87"
-           },
-           "\u0645\u062C": {
-             "isolated": "\uFC45",
-             "initial": "\uFCCE"
-           },
-           "\u0645\u062D": {
-             "isolated": "\uFC46",
-             "initial": "\uFCCF"
-           },
-           "\u0645\u062E": {
-             "isolated": "\uFC47",
-             "initial": "\uFCD0"
-           },
-           "\u0645\u0645": {
-             "isolated": "\uFC48",
-             "final": "\uFC89",
-             "initial": "\uFCD1"
-           },
-           "\u0645\u0649": {
-             "isolated": "\uFC49"
-           },
-           "\u0645\u064A": {
-             "isolated": "\uFC4A"
-           },
-           "\u0646\u062C": {
-             "isolated": "\uFC4B",
-             "initial": "\uFCD2"
-           },
-           "\u0646\u062D": {
-             "isolated": "\uFC4C",
-             "initial": "\uFCD3"
-           },
-           "\u0646\u062E": {
-             "isolated": "\uFC4D",
-             "initial": "\uFCD4"
-           },
-           "\u0646\u0645": {
-             "isolated": "\uFC4E",
-             "final": "\uFC8C",
-             "initial": "\uFCD5",
-             "medial": "\uFCEE"
-           },
-           "\u0646\u0649": {
-             "isolated": "\uFC4F",
-             "final": "\uFC8E"
-           },
-           "\u0646\u064A": {
-             "isolated": "\uFC50",
-             "final": "\uFC8F"
-           },
-           "\u0647\u062C": {
-             "isolated": "\uFC51",
-             "initial": "\uFCD7"
-           },
-           "\u0647\u0645": {
-             "isolated": "\uFC52",
-             "initial": "\uFCD8"
-           },
-           "\u0647\u0649": {
-             "isolated": "\uFC53"
-           },
-           "\u0647\u064A": {
-             "isolated": "\uFC54"
-           },
-           "\u064A\u062C": {
-             "isolated": "\uFC55",
-             "initial": "\uFCDA"
-           },
-           "\u064A\u062D": {
-             "isolated": "\uFC56",
-             "initial": "\uFCDB"
-           },
-           "\u064A\u062E": {
-             "isolated": "\uFC57",
-             "initial": "\uFCDC"
-           },
-           "\u064A\u0645": {
-             "isolated": "\uFC58",
-             "final": "\uFC93",
-             "initial": "\uFCDD",
-             "medial": "\uFCF0"
-           },
-           "\u064A\u0649": {
-             "isolated": "\uFC59",
-             "final": "\uFC95"
-           },
-           "\u064A\u064A": {
-             "isolated": "\uFC5A",
-             "final": "\uFC96"
-           },
-           "\u0630\u0670": {
-             "isolated": "\uFC5B"
-           },
-           "\u0631\u0670": {
-             "isolated": "\uFC5C"
-           },
-           "\u0649\u0670": {
-             "isolated": "\uFC5D",
-             "final": "\uFC90"
-           },
-           "\u064C\u0651": {
-             "isolated": "\uFC5E"
-           },
-           "\u064D\u0651": {
-             "isolated": "\uFC5F"
-           },
-           "\u064E\u0651": {
-             "isolated": "\uFC60"
-           },
-           "\u064F\u0651": {
-             "isolated": "\uFC61"
-           },
-           "\u0650\u0651": {
-             "isolated": "\uFC62"
-           },
-           "\u0651\u0670": {
-             "isolated": "\uFC63"
-           },
-           "\u0626\u0631": {
-             "final": "\uFC64"
-           },
-           "\u0626\u0632": {
-             "final": "\uFC65"
-           },
-           "\u0626\u0646": {
-             "final": "\uFC67"
-           },
-           "\u0628\u0631": {
-             "final": "\uFC6A"
-           },
-           "\u0628\u0632": {
-             "final": "\uFC6B"
-           },
-           "\u0628\u0646": {
-             "final": "\uFC6D"
-           },
-           "\u062A\u0631": {
-             "final": "\uFC70"
-           },
-           "\u062A\u0632": {
-             "final": "\uFC71"
-           },
-           "\u062A\u0646": {
-             "final": "\uFC73"
-           },
-           "\u062B\u0631": {
-             "final": "\uFC76"
-           },
-           "\u062B\u0632": {
-             "final": "\uFC77"
-           },
-           "\u062B\u0646": {
-             "final": "\uFC79"
-           },
-           "\u062B\u064A": {
-             "final": "\uFC7B"
-           },
-           "\u0645\u0627": {
-             "final": "\uFC88"
-           },
-           "\u0646\u0631": {
-             "final": "\uFC8A"
-           },
-           "\u0646\u0632": {
-             "final": "\uFC8B"
-           },
-           "\u0646\u0646": {
-             "final": "\uFC8D"
-           },
-           "\u064A\u0631": {
-             "final": "\uFC91"
-           },
-           "\u064A\u0632": {
-             "final": "\uFC92"
-           },
-           "\u064A\u0646": {
-             "final": "\uFC94"
-           },
-           "\u0626\u062E": {
-             "initial": "\uFC99"
-           },
-           "\u0626\u0647": {
-             "initial": "\uFC9B",
-             "medial": "\uFCE0"
-           },
-           "\u0628\u0647": {
-             "initial": "\uFCA0",
-             "medial": "\uFCE2"
-           },
-           "\u062A\u0647": {
-             "initial": "\uFCA5",
-             "medial": "\uFCE4"
-           },
-           "\u0635\u062E": {
-             "initial": "\uFCB2"
-           },
-           "\u0644\u0647": {
-             "initial": "\uFCCD"
-           },
-           "\u0646\u0647": {
-             "initial": "\uFCD6",
-             "medial": "\uFCEF"
-           },
-           "\u0647\u0670": {
-             "initial": "\uFCD9"
-           },
-           "\u064A\u0647": {
-             "initial": "\uFCDE",
-             "medial": "\uFCF1"
-           },
-           "\u062B\u0647": {
-             "medial": "\uFCE6"
-           },
-           "\u0633\u0647": {
-             "medial": "\uFCE8",
-             "initial": "\uFD31"
-           },
-           "\u0634\u0645": {
-             "medial": "\uFCE9",
-             "isolated": "\uFD0C",
-             "final": "\uFD28",
-             "initial": "\uFD30"
-           },
-           "\u0634\u0647": {
-             "medial": "\uFCEA",
-             "initial": "\uFD32"
-           },
-           "\u0640\u064E\u0651": {
-             "medial": "\uFCF2"
-           },
-           "\u0640\u064F\u0651": {
-             "medial": "\uFCF3"
-           },
-           "\u0640\u0650\u0651": {
-             "medial": "\uFCF4"
-           },
-           "\u0637\u0649": {
-             "isolated": "\uFCF5",
-             "final": "\uFD11"
-           },
-           "\u0637\u064A": {
-             "isolated": "\uFCF6",
-             "final": "\uFD12"
-           },
-           "\u0639\u0649": {
-             "isolated": "\uFCF7",
-             "final": "\uFD13"
-           },
-           "\u0639\u064A": {
-             "isolated": "\uFCF8",
-             "final": "\uFD14"
-           },
-           "\u063A\u0649": {
-             "isolated": "\uFCF9",
-             "final": "\uFD15"
-           },
-           "\u063A\u064A": {
-             "isolated": "\uFCFA",
-             "final": "\uFD16"
-           },
-           "\u0633\u0649": {
-             "isolated": "\uFCFB"
-           },
-           "\u0633\u064A": {
-             "isolated": "\uFCFC",
-             "final": "\uFD18"
-           },
-           "\u0634\u0649": {
-             "isolated": "\uFCFD",
-             "final": "\uFD19"
-           },
-           "\u0634\u064A": {
-             "isolated": "\uFCFE",
-             "final": "\uFD1A"
-           },
-           "\u062D\u0649": {
-             "isolated": "\uFCFF",
-             "final": "\uFD1B"
-           },
-           "\u062D\u064A": {
-             "isolated": "\uFD00",
-             "final": "\uFD1C"
-           },
-           "\u062C\u0649": {
-             "isolated": "\uFD01",
-             "final": "\uFD1D"
-           },
-           "\u062C\u064A": {
-             "isolated": "\uFD02",
-             "final": "\uFD1E"
-           },
-           "\u062E\u0649": {
-             "isolated": "\uFD03",
-             "final": "\uFD1F"
-           },
-           "\u062E\u064A": {
-             "isolated": "\uFD04",
-             "final": "\uFD20"
-           },
-           "\u0635\u0649": {
-             "isolated": "\uFD05",
-             "final": "\uFD21"
-           },
-           "\u0635\u064A": {
-             "isolated": "\uFD06",
-             "final": "\uFD22"
-           },
-           "\u0636\u0649": {
-             "isolated": "\uFD07",
-             "final": "\uFD23"
-           },
-           "\u0636\u064A": {
-             "isolated": "\uFD08",
-             "final": "\uFD24"
-           },
-           "\u0634\u062C": {
-             "isolated": "\uFD09",
-             "final": "\uFD25",
-             "initial": "\uFD2D",
-             "medial": "\uFD37"
-           },
-           "\u0634\u062D": {
-             "isolated": "\uFD0A",
-             "final": "\uFD26",
-             "initial": "\uFD2E",
-             "medial": "\uFD38"
-           },
-           "\u0634\u062E": {
-             "isolated": "\uFD0B",
-             "final": "\uFD27",
-             "initial": "\uFD2F",
-             "medial": "\uFD39"
-           },
-           "\u0634\u0631": {
-             "isolated": "\uFD0D",
-             "final": "\uFD29"
-           },
-           "\u0633\u0631": {
-             "isolated": "\uFD0E",
-             "final": "\uFD2A"
-           },
-           "\u0635\u0631": {
-             "isolated": "\uFD0F",
-             "final": "\uFD2B"
-           },
-           "\u0636\u0631": {
-             "isolated": "\uFD10",
-             "final": "\uFD2C"
-           },
-           "\u0633\u0639": {
-             "final": "\uFD17"
-           },
-           "\u062A\u062C\u0645": {
-             "initial": "\uFD50"
-           },
-           "\u062A\u062D\u062C": {
-             "final": "\uFD51",
-             "initial": "\uFD52"
-           },
-           "\u062A\u062D\u0645": {
-             "initial": "\uFD53"
-           },
-           "\u062A\u062E\u0645": {
-             "initial": "\uFD54"
-           },
-           "\u062A\u0645\u062C": {
-             "initial": "\uFD55"
-           },
-           "\u062A\u0645\u062D": {
-             "initial": "\uFD56"
-           },
-           "\u062A\u0645\u062E": {
-             "initial": "\uFD57"
-           },
-           "\u062C\u0645\u062D": {
-             "final": "\uFD58",
-             "initial": "\uFD59"
-           },
-           "\u062D\u0645\u064A": {
-             "final": "\uFD5A"
-           },
-           "\u062D\u0645\u0649": {
-             "final": "\uFD5B"
-           },
-           "\u0633\u062D\u062C": {
-             "initial": "\uFD5C"
-           },
-           "\u0633\u062C\u062D": {
-             "initial": "\uFD5D"
-           },
-           "\u0633\u062C\u0649": {
-             "final": "\uFD5E"
-           },
-           "\u0633\u0645\u062D": {
-             "final": "\uFD5F",
-             "initial": "\uFD60"
-           },
-           "\u0633\u0645\u062C": {
-             "initial": "\uFD61"
-           },
-           "\u0633\u0645\u0645": {
-             "final": "\uFD62",
-             "initial": "\uFD63"
-           },
-           "\u0635\u062D\u062D": {
-             "final": "\uFD64",
-             "initial": "\uFD65"
-           },
-           "\u0635\u0645\u0645": {
-             "final": "\uFD66",
-             "initial": "\uFDC5"
-           },
-           "\u0634\u062D\u0645": {
-             "final": "\uFD67",
-             "initial": "\uFD68"
-           },
-           "\u0634\u062C\u064A": {
-             "final": "\uFD69"
-           },
-           "\u0634\u0645\u062E": {
-             "final": "\uFD6A",
-             "initial": "\uFD6B"
-           },
-           "\u0634\u0645\u0645": {
-             "final": "\uFD6C",
-             "initial": "\uFD6D"
-           },
-           "\u0636\u062D\u0649": {
-             "final": "\uFD6E"
-           },
-           "\u0636\u062E\u0645": {
-             "final": "\uFD6F",
-             "initial": "\uFD70"
-           },
-           "\u0636\u0645\u062D": {
-             "final": "\uFD71"
-           },
-           "\u0637\u0645\u062D": {
-             "initial": "\uFD72"
-           },
-           "\u0637\u0645\u0645": {
-             "initial": "\uFD73"
-           },
-           "\u0637\u0645\u064A": {
-             "final": "\uFD74"
-           },
-           "\u0639\u062C\u0645": {
-             "final": "\uFD75",
-             "initial": "\uFDC4"
-           },
-           "\u0639\u0645\u0645": {
-             "final": "\uFD76",
-             "initial": "\uFD77"
-           },
-           "\u0639\u0645\u0649": {
-             "final": "\uFD78"
-           },
-           "\u063A\u0645\u0645": {
-             "final": "\uFD79"
-           },
-           "\u063A\u0645\u064A": {
-             "final": "\uFD7A"
-           },
-           "\u063A\u0645\u0649": {
-             "final": "\uFD7B"
-           },
-           "\u0641\u062E\u0645": {
-             "final": "\uFD7C",
-             "initial": "\uFD7D"
-           },
-           "\u0642\u0645\u062D": {
-             "final": "\uFD7E",
-             "initial": "\uFDB4"
-           },
-           "\u0642\u0645\u0645": {
-             "final": "\uFD7F"
-           },
-           "\u0644\u062D\u0645": {
-             "final": "\uFD80",
-             "initial": "\uFDB5"
-           },
-           "\u0644\u062D\u064A": {
-             "final": "\uFD81"
-           },
-           "\u0644\u062D\u0649": {
-             "final": "\uFD82"
-           },
-           "\u0644\u062C\u062C": {
-             "initial": "\uFD83",
-             "final": "\uFD84"
-           },
-           "\u0644\u062E\u0645": {
-             "final": "\uFD85",
-             "initial": "\uFD86"
-           },
-           "\u0644\u0645\u062D": {
-             "final": "\uFD87",
-             "initial": "\uFD88"
-           },
-           "\u0645\u062D\u062C": {
-             "initial": "\uFD89"
-           },
-           "\u0645\u062D\u0645": {
-             "initial": "\uFD8A"
-           },
-           "\u0645\u062D\u064A": {
-             "final": "\uFD8B"
-           },
-           "\u0645\u062C\u062D": {
-             "initial": "\uFD8C"
-           },
-           "\u0645\u062C\u0645": {
-             "initial": "\uFD8D"
-           },
-           "\u0645\u062E\u062C": {
-             "initial": "\uFD8E"
-           },
-           "\u0645\u062E\u0645": {
-             "initial": "\uFD8F"
-           },
-           "\u0645\u062C\u062E": {
-             "initial": "\uFD92"
-           },
-           "\u0647\u0645\u062C": {
-             "initial": "\uFD93"
-           },
-           "\u0647\u0645\u0645": {
-             "initial": "\uFD94"
-           },
-           "\u0646\u062D\u0645": {
-             "initial": "\uFD95"
-           },
-           "\u0646\u062D\u0649": {
-             "final": "\uFD96"
-           },
-           "\u0646\u062C\u0645": {
-             "final": "\uFD97",
-             "initial": "\uFD98"
-           },
-           "\u0646\u062C\u0649": {
-             "final": "\uFD99"
-           },
-           "\u0646\u0645\u064A": {
-             "final": "\uFD9A"
-           },
-           "\u0646\u0645\u0649": {
-             "final": "\uFD9B"
-           },
-           "\u064A\u0645\u0645": {
-             "final": "\uFD9C",
-             "initial": "\uFD9D"
-           },
-           "\u0628\u062E\u064A": {
-             "final": "\uFD9E"
-           },
-           "\u062A\u062C\u064A": {
-             "final": "\uFD9F"
-           },
-           "\u062A\u062C\u0649": {
-             "final": "\uFDA0"
-           },
-           "\u062A\u062E\u064A": {
-             "final": "\uFDA1"
-           },
-           "\u062A\u062E\u0649": {
-             "final": "\uFDA2"
-           },
-           "\u062A\u0645\u064A": {
-             "final": "\uFDA3"
-           },
-           "\u062A\u0645\u0649": {
-             "final": "\uFDA4"
-           },
-           "\u062C\u0645\u064A": {
-             "final": "\uFDA5"
-           },
-           "\u062C\u062D\u0649": {
-             "final": "\uFDA6"
-           },
-           "\u062C\u0645\u0649": {
-             "final": "\uFDA7"
-           },
-           "\u0633\u062E\u0649": {
-             "final": "\uFDA8"
-           },
-           "\u0635\u062D\u064A": {
-             "final": "\uFDA9"
-           },
-           "\u0634\u062D\u064A": {
-             "final": "\uFDAA"
-           },
-           "\u0636\u062D\u064A": {
-             "final": "\uFDAB"
-           },
-           "\u0644\u062C\u064A": {
-             "final": "\uFDAC"
-           },
-           "\u0644\u0645\u064A": {
-             "final": "\uFDAD"
-           },
-           "\u064A\u062D\u064A": {
-             "final": "\uFDAE"
-           },
-           "\u064A\u062C\u064A": {
-             "final": "\uFDAF"
-           },
-           "\u064A\u0645\u064A": {
-             "final": "\uFDB0"
-           },
-           "\u0645\u0645\u064A": {
-             "final": "\uFDB1"
-           },
-           "\u0642\u0645\u064A": {
-             "final": "\uFDB2"
-           },
-           "\u0646\u062D\u064A": {
-             "final": "\uFDB3"
-           },
-           "\u0639\u0645\u064A": {
-             "final": "\uFDB6"
-           },
-           "\u0643\u0645\u064A": {
-             "final": "\uFDB7"
-           },
-           "\u0646\u062C\u062D": {
-             "initial": "\uFDB8",
-             "final": "\uFDBD"
-           },
-           "\u0645\u062E\u064A": {
-             "final": "\uFDB9"
-           },
-           "\u0644\u062C\u0645": {
-             "initial": "\uFDBA",
-             "final": "\uFDBC"
-           },
-           "\u0643\u0645\u0645": {
-             "final": "\uFDBB",
-             "initial": "\uFDC3"
-           },
-           "\u062C\u062D\u064A": {
-             "final": "\uFDBE"
-           },
-           "\u062D\u062C\u064A": {
-             "final": "\uFDBF"
-           },
-           "\u0645\u062C\u064A": {
-             "final": "\uFDC0"
-           },
-           "\u0641\u0645\u064A": {
-             "final": "\uFDC1"
-           },
-           "\u0628\u062D\u064A": {
-             "final": "\uFDC2"
-           },
-           "\u0633\u062E\u064A": {
-             "final": "\uFDC6"
-           },
-           "\u0646\u062C\u064A": {
-             "final": "\uFDC7"
-           },
-           "\u0644\u0622": {
-             "isolated": "\uFEF5",
-             "final": "\uFEF6"
-           },
-           "\u0644\u0623": {
-             "isolated": "\uFEF7",
-             "final": "\uFEF8"
-           },
-           "\u0644\u0625": {
-             "isolated": "\uFEF9",
-             "final": "\uFEFA"
-           },
-           "\u0644\u0627": {
-             "isolated": "\uFEFB",
-             "final": "\uFEFC"
-           },
-           "words": {
-             "\u0635\u0644\u06D2": "\uFDF0",
-             "\u0642\u0644\u06D2": "\uFDF1",
-             "\u0627\u0644\u0644\u0647": "\uFDF2",
-             "\u0627\u0643\u0628\u0631": "\uFDF3",
-             "\u0645\u062D\u0645\u062F": "\uFDF4",
-             "\u0635\u0644\u0639\u0645": "\uFDF5",
-             "\u0631\u0633\u0648\u0644": "\uFDF6",
-             "\u0639\u0644\u064A\u0647": "\uFDF7",
-             "\u0648\u0633\u0644\u0645": "\uFDF8",
-             "\u0635\u0644\u0649": "\uFDF9",
-             "\u0635\u0644\u0649\u0627\u0644\u0644\u0647\u0639\u0644\u064A\u0647\u0648\u0633\u0644\u0645": "\uFDFA",
-             "\u062C\u0644\u062C\u0644\u0627\u0644\u0647": "\uFDFB",
-             "\u0631\u06CC\u0627\u0644": "\uFDFC"
-           }
-         };
-         exports["default"] = ligatureReference;
-       });
-
-       var reference = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         var letterList = Object.keys(unicodeArabic["default"]);
-         exports.letterList = letterList;
-         var ligatureList = Object.keys(unicodeLigatures["default"]);
-         exports.ligatureList = ligatureList;
-         var ligatureWordList = Object.keys(unicodeLigatures["default"].words);
-         exports.ligatureWordList = ligatureWordList;
-         var lams = "\u0644\u06B5\u06B6\u06B7\u06B8";
-         exports.lams = lams;
-         var alefs = "\u0627\u0622\u0623\u0625\u0671\u0672\u0673\u0675\u0773\u0774";
-         exports.alefs = alefs; // for (var l = 1; l < lams.length; l++) {
-         //   console.log('-');
-         //   for (var a = 0; a < alefs.length; a++) {
-         //     console.log(a + ': ' + lams[l] + alefs[a]);
-         //   }
-         // }
-
-         var tashkeel = "\u0605\u0640\u0670\u0674\u06DF\u06E7\u06E8";
-         exports.tashkeel = tashkeel;
-
-         function addToTashkeel(start, finish) {
-           for (var i = start; i <= finish; i++) {
-             exports.tashkeel = tashkeel += String.fromCharCode(i);
-           }
-         }
-
-         addToTashkeel(0x0610, 0x061A);
-         addToTashkeel(0x064B, 0x065F);
-         addToTashkeel(0x06D6, 0x06DC);
-         addToTashkeel(0x06E0, 0x06E4);
-         addToTashkeel(0x06EA, 0x06ED);
-         addToTashkeel(0x08D3, 0x08E1);
-         addToTashkeel(0x08E3, 0x08FF);
-         addToTashkeel(0xFE70, 0xFE7F);
-         var lineBreakers = "\u0627\u0629\u0648\u06C0\u06CF\u06FD\u06FE\u076B\u076C\u0771\u0773\u0774\u0778\u0779\u08E2\u08B1\u08B2\u08B9";
-         exports.lineBreakers = lineBreakers;
-
-         function addToLineBreakers(start, finish) {
-           for (var i = start; i <= finish; i++) {
-             exports.lineBreakers = lineBreakers += String.fromCharCode(i);
-           }
-         }
-
-         addToLineBreakers(0x0600, 0x061F); // it's OK to include tashkeel in this range as it is ignored
-
-         addToLineBreakers(0x0621, 0x0625);
-         addToLineBreakers(0x062F, 0x0632);
-         addToLineBreakers(0x0660, 0x066D); // numerals, math
-
-         addToLineBreakers(0x0671, 0x0677);
-         addToLineBreakers(0x0688, 0x0699);
-         addToLineBreakers(0x06C3, 0x06CB);
-         addToLineBreakers(0x06D2, 0x06F9);
-         addToLineBreakers(0x0759, 0x075B);
-         addToLineBreakers(0x08AA, 0x08AE);
-         addToLineBreakers(0xFB50, 0xFDFD); // presentation forms look like they could connect, but never do
-         // Presentation Forms A includes diacritics but they are meant to stand alone
-
-         addToLineBreakers(0xFE80, 0xFEFC); // presentation forms look like they could connect, but never do
-         // numerals, math
-
-         addToLineBreakers(0x10E60, 0x10E7F);
-         addToLineBreakers(0x1EC70, 0x1ECBF);
-         addToLineBreakers(0x1EE00, 0x1EEFF);
-       });
-
-       var GlyphSplitter_1 = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
+           if (reference_1$4.tashkeel.indexOf(letter) === -1) {
+             // don't allow tashkeel to hide line break
+             lastLetter = letter;
+           }
          });
+         return letters;
+       }
 
-         function GlyphSplitter(word) {
-           var letters = [];
-           var lastLetter = '';
-           word.split('').forEach(function (letter) {
-             if (isArabic_1.isArabic(letter)) {
-               if (reference.tashkeel.indexOf(letter) > -1) {
-                 letters[letters.length - 1] += letter;
-               } else if (lastLetter.length && (reference.lams.indexOf(lastLetter) === 0 && reference.alefs.indexOf(letter) > -1 || reference.lams.indexOf(lastLetter) > 0 && reference.alefs.indexOf(letter) === 0)) {
-                 // valid LA forms
-                 letters[letters.length - 1] += letter;
-               } else {
-                 letters.push(letter);
-               }
-             } else {
-               letters.push(letter);
-             }
+       BaselineSplitter$1.BaselineSplitter = BaselineSplitter;
 
-             if (reference.tashkeel.indexOf(letter) === -1) {
-               lastLetter = letter;
-             }
-           });
-           return letters;
-         }
+       var Normalization = {};
 
-         exports.GlyphSplitter = GlyphSplitter;
+       Object.defineProperty(Normalization, "__esModule", {
+         value: true
        });
+       var unicode_arabic_1$2 = unicodeArabic;
+       var unicode_ligatures_1$1 = unicodeLigatures;
+       var isArabic_1$4 = isArabic$1;
+       var reference_1$3 = reference;
 
-       var BaselineSplitter_1 = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-
-         function BaselineSplitter(word) {
-           var letters = [];
-           var lastLetter = '';
-           word.split('').forEach(function (letter) {
-             if (isArabic_1.isArabic(letter) && isArabic_1.isArabic(lastLetter)) {
-               if (lastLetter.length && reference.tashkeel.indexOf(letter) > -1) {
-                 letters[letters.length - 1] += letter;
-               } else if (reference.lineBreakers.indexOf(lastLetter) > -1) {
-                 letters.push(letter);
-               } else {
-                 letters[letters.length - 1] += letter;
-               }
-             } else {
-               letters.push(letter);
-             }
-
-             if (reference.tashkeel.indexOf(letter) === -1) {
-               // don't allow tashkeel to hide line break
-               lastLetter = letter;
-             }
-           });
-           return letters;
+       function Normal(word, breakPresentationForm) {
+         // default is to turn initial/isolated/medial/final presentation form to generic
+         if (typeof breakPresentationForm === 'undefined') {
+           breakPresentationForm = true;
          }
 
-         exports.BaselineSplitter = BaselineSplitter;
-       });
-
-       var Normalization = createCommonjsModule(function (module, exports) {
-
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-
-         function Normal(word, breakPresentationForm) {
-           // default is to turn initial/isolated/medial/final presentation form to generic
-           if (typeof breakPresentationForm === 'undefined') {
-             breakPresentationForm = true;
+         var returnable = '';
+         word.split('').forEach(function (letter) {
+           if (!isArabic_1$4.isArabic(letter)) {
+             returnable += letter;
+             return;
            }
 
-           var returnable = '';
-           word.split('').forEach(function (letter) {
-             if (!isArabic_1.isArabic(letter)) {
-               returnable += letter;
-               return;
-             }
-
-             for (var w = 0; w < reference.letterList.length; w++) {
-               // ok so we are checking this potential lettertron
-               var letterForms = unicodeArabic["default"][reference.letterList[w]];
-               var versions = Object.keys(letterForms);
+           for (var w = 0; w < reference_1$3.letterList.length; w++) {
+             // ok so we are checking this potential lettertron
+             var letterForms = unicode_arabic_1$2["default"][reference_1$3.letterList[w]];
+             var versions = Object.keys(letterForms);
 
-               for (var v = 0; v < versions.length; v++) {
-                 var localVersion = letterForms[versions[v]];
+             for (var v = 0; v < versions.length; v++) {
+               var localVersion = letterForms[versions[v]];
 
-                 if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-                   // look at this embedded object
-                   var embeddedForms = Object.keys(localVersion);
+               if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+                 // look at this embedded object
+                 var embeddedForms = Object.keys(localVersion);
 
-                   for (var ef = 0; ef < embeddedForms.length; ef++) {
-                     var form = localVersion[embeddedForms[ef]];
+                 for (var ef = 0; ef < embeddedForms.length; ef++) {
+                   var form = localVersion[embeddedForms[ef]];
 
-                     if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
-                       // match
-                       // console.log('embedded match');
-                       if (form === letter) {
-                         // match exact
-                         if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
-                           // replace presentation form
-                           // console.log('keeping normal form of the letter');
-                           if (_typeof(localVersion['normal']) === 'object') {
-                             returnable += localVersion['normal'][0];
-                           } else {
-                             returnable += localVersion['normal'];
-                           }
+                   if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                     // match
+                     // console.log('embedded match');
+                     if (form === letter) {
+                       // match exact
+                       if (breakPresentationForm && localVersion['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(embeddedForms[ef]) > -1) {
+                         // replace presentation form
+                         // console.log('keeping normal form of the letter');
+                         if (_typeof(localVersion['normal']) === 'object') {
+                           returnable += localVersion['normal'][0];
+                         } else {
+                           returnable += localVersion['normal'];
+                         }
 
-                           return;
-                         } // console.log('keeping this letter');
+                         return;
+                       } // console.log('keeping this letter');
 
 
-                         returnable += letter;
-                         return;
-                       } else if (_typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
-                         // match
-                         returnable += form[0]; // console.log('added the first letter from the same array');
+                       returnable += letter;
+                       return;
+                     } else if (_typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                       // match
+                       returnable += form[0]; // console.log('added the first letter from the same array');
 
-                         return;
-                       }
+                       return;
                      }
                    }
-                 } else if (localVersion === letter) {
-                   // match exact
-                   if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
-                     // replace presentation form
-                     // console.log('keeping normal form of the letter');
-                     if (_typeof(letterForms['normal']) === 'object') {
-                       returnable += letterForms['normal'][0];
-                     } else {
-                       returnable += letterForms['normal'];
-                     }
+                 }
+               } else if (localVersion === letter) {
+                 // match exact
+                 if (breakPresentationForm && letterForms['normal'] && ['isolated', 'initial', 'medial', 'final'].indexOf(versions[v]) > -1) {
+                   // replace presentation form
+                   // console.log('keeping normal form of the letter');
+                   if (_typeof(letterForms['normal']) === 'object') {
+                     returnable += letterForms['normal'][0];
+                   } else {
+                     returnable += letterForms['normal'];
+                   }
 
-                     return;
-                   } // console.log('keeping this letter');
+                   return;
+                 } // console.log('keeping this letter');
 
 
-                   returnable += letter;
-                   return;
-                 } else if (_typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-                   // match
-                   returnable += localVersion[0]; // console.log('added the first letter from the same array');
+                 returnable += letter;
+                 return;
+               } else if (_typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+                 // match
+                 returnable += localVersion[0]; // console.log('added the first letter from the same array');
 
-                   return;
-                 }
+                 return;
                }
-             } // try ligatures
+             }
+           } // try ligatures
 
 
-             for (var v2 = 0; v2 < reference.ligatureList.length; v2++) {
-               var normalForm = reference.ligatureList[v2];
+           for (var v2 = 0; v2 < reference_1$3.ligatureList.length; v2++) {
+             var normalForm = reference_1$3.ligatureList[v2];
 
-               if (normalForm !== 'words') {
-                 var ligForms = Object.keys(unicodeLigatures["default"][normalForm]);
+             if (normalForm !== 'words') {
+               var ligForms = Object.keys(unicode_ligatures_1$1["default"][normalForm]);
 
-                 for (var f = 0; f < ligForms.length; f++) {
-                   if (unicodeLigatures["default"][normalForm][ligForms[f]] === letter) {
-                     returnable += normalForm;
-                     return;
-                   }
+               for (var f = 0; f < ligForms.length; f++) {
+                 if (unicode_ligatures_1$1["default"][normalForm][ligForms[f]] === letter) {
+                   returnable += normalForm;
+                   return;
                  }
                }
-             } // try words ligatures
+             }
+           } // try words ligatures
 
 
-             for (var v3 = 0; v3 < reference.ligatureWordList.length; v3++) {
-               var _normalForm = reference.ligatureWordList[v3];
+           for (var v3 = 0; v3 < reference_1$3.ligatureWordList.length; v3++) {
+             var _normalForm = reference_1$3.ligatureWordList[v3];
 
-               if (unicodeLigatures["default"].words[_normalForm] === letter) {
-                 returnable += _normalForm;
-                 return;
-               }
+             if (unicode_ligatures_1$1["default"].words[_normalForm] === letter) {
+               returnable += _normalForm;
+               return;
              }
+           }
 
-             returnable += letter; // console.log('kept the letter')
-           });
-           return returnable;
-         }
+           returnable += letter; // console.log('kept the letter')
+         });
+         return returnable;
+       }
 
-         exports.Normal = Normal;
-       });
+       Normalization.Normal = Normal;
 
-       var CharShaper_1 = createCommonjsModule(function (module, exports) {
+       var CharShaper$1 = {};
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+       Object.defineProperty(CharShaper$1, "__esModule", {
+         value: true
+       });
+       var unicode_arabic_1$1 = unicodeArabic;
+       var isArabic_1$3 = isArabic$1;
+       var reference_1$2 = reference;
 
-         function CharShaper(letter, form) {
-           if (!isArabic_1.isArabic(letter)) {
-             // fail not Arabic
-             throw new Error('Not Arabic');
-           }
+       function CharShaper(letter, form) {
+         if (!isArabic_1$3.isArabic(letter)) {
+           // fail not Arabic
+           throw new Error('Not Arabic');
+         }
 
-           if (letter === "\u0621") {
-             // hamza alone
-             return "\u0621";
-           }
+         if (letter === "\u0621") {
+           // hamza alone
+           return "\u0621";
+         }
 
-           for (var w = 0; w < reference.letterList.length; w++) {
-             // ok so we are checking this potential lettertron
-             var letterForms = unicodeArabic["default"][reference.letterList[w]];
-             var versions = Object.keys(letterForms);
+         for (var w = 0; w < reference_1$2.letterList.length; w++) {
+           // ok so we are checking this potential lettertron
+           var letterForms = unicode_arabic_1$1["default"][reference_1$2.letterList[w]];
+           var versions = Object.keys(letterForms);
 
-             for (var v = 0; v < versions.length; v++) {
-               var localVersion = letterForms[versions[v]];
+           for (var v = 0; v < versions.length; v++) {
+             var localVersion = letterForms[versions[v]];
 
-               if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-                 if (versions.indexOf(form) > -1) {
-                   return letterForms[form];
-                 }
-               } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-                 // check embedded
-                 var embeddedVersions = Object.keys(localVersion);
+             if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+               if (versions.indexOf(form) > -1) {
+                 return letterForms[form];
+               }
+             } else if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+               // check embedded
+               var embeddedVersions = Object.keys(localVersion);
 
-                 for (var ev = 0; ev < embeddedVersions.length; ev++) {
-                   if (localVersion[embeddedVersions[ev]] === letter || _typeof(localVersion[embeddedVersions[ev]]) === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1) {
-                     if (embeddedVersions.indexOf(form) > -1) {
-                       return localVersion[form];
-                     }
+               for (var ev = 0; ev < embeddedVersions.length; ev++) {
+                 if (localVersion[embeddedVersions[ev]] === letter || _typeof(localVersion[embeddedVersions[ev]]) === 'object' && localVersion[embeddedVersions[ev]].indexOf && localVersion[embeddedVersions[ev]].indexOf(letter) > -1) {
+                   if (embeddedVersions.indexOf(form) > -1) {
+                     return localVersion[form];
                    }
                  }
                }
              }
            }
          }
+       }
 
-         exports.CharShaper = CharShaper;
-       });
-
-       var WordShaper_1 = createCommonjsModule(function (module, exports) {
+       CharShaper$1.CharShaper = CharShaper;
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+       var WordShaper$2 = {};
 
-         function WordShaper(word) {
-           var state = 'initial';
-           var output = '';
+       Object.defineProperty(WordShaper$2, "__esModule", {
+         value: true
+       });
+       var isArabic_1$2 = isArabic$1;
+       var reference_1$1 = reference;
+       var CharShaper_1$1 = CharShaper$1;
+       var unicode_ligatures_1 = unicodeLigatures;
 
-           for (var w = 0; w < word.length; w++) {
-             var nextLetter = ' ';
+       function WordShaper$1(word) {
+         var state = 'initial';
+         var output = '';
 
-             for (var nxw = w + 1; nxw < word.length; nxw++) {
-               if (!isArabic_1.isArabic(word[nxw])) {
-                 break;
-               }
+         for (var w = 0; w < word.length; w++) {
+           var nextLetter = ' ';
 
-               if (reference.tashkeel.indexOf(word[nxw]) === -1) {
-                 nextLetter = word[nxw];
-                 break;
-               }
+           for (var nxw = w + 1; nxw < word.length; nxw++) {
+             if (!isArabic_1$2.isArabic(word[nxw])) {
+               break;
              }
 
-             if (!isArabic_1.isArabic(word[w]) || isArabic_1.isMath(word[w])) {
-               // space or other non-Arabic
-               output += word[w];
-               state = 'initial';
-             } else if (reference.tashkeel.indexOf(word[w]) > -1) {
-               // tashkeel - add without changing state
-               output += word[w];
-             } else if (nextLetter === ' ' || // last Arabic letter in this word
-             reference.lineBreakers.indexOf(word[w]) > -1) {
-               // the current letter is known to break lines
-               output += CharShaper_1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
-               state = 'initial';
-             } else if (reference.lams.indexOf(word[w]) > -1 && reference.alefs.indexOf(nextLetter) > -1) {
-               // LA letters - advance an additional letter after this
-               output += unicodeLigatures["default"][word[w] + nextLetter][state === 'initial' ? 'isolated' : 'final'];
+             if (reference_1$1.tashkeel.indexOf(word[nxw]) === -1) {
+               nextLetter = word[nxw];
+               break;
+             }
+           }
 
-               while (word[w] !== nextLetter) {
-                 w++;
-               }
+           if (!isArabic_1$2.isArabic(word[w]) || isArabic_1$2.isMath(word[w])) {
+             // space or other non-Arabic
+             output += word[w];
+             state = 'initial';
+           } else if (reference_1$1.tashkeel.indexOf(word[w]) > -1) {
+             // tashkeel - add without changing state
+             output += word[w];
+           } else if (nextLetter === ' ' // last Arabic letter in this word
+           || reference_1$1.lineBreakers.indexOf(word[w]) > -1) {
+             // the current letter is known to break lines
+             output += CharShaper_1$1.CharShaper(word[w], state === 'initial' ? 'isolated' : 'final');
+             state = 'initial';
+           } else if (reference_1$1.lams.indexOf(word[w]) > -1 && reference_1$1.alefs.indexOf(nextLetter) > -1) {
+             // LA letters - advance an additional letter after this
+             output += unicode_ligatures_1["default"][word[w] + nextLetter][state === 'initial' ? 'isolated' : 'final'];
 
-               state = 'initial';
-             } else {
-               output += CharShaper_1.CharShaper(word[w], state);
-               state = 'medial';
+             while (word[w] !== nextLetter) {
+               w++;
              }
-           }
 
-           return output;
+             state = 'initial';
+           } else {
+             output += CharShaper_1$1.CharShaper(word[w], state);
+             state = 'medial';
+           }
          }
 
-         exports.WordShaper = WordShaper;
-       });
+         return output;
+       }
 
-       var ParentLetter_1 = createCommonjsModule(function (module, exports) {
+       WordShaper$2.WordShaper = WordShaper$1;
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+       var ParentLetter$1 = {};
 
-         function ParentLetter(letter) {
-           if (!isArabic_1.isArabic(letter)) {
-             throw new Error('Not an Arabic letter');
-           }
+       Object.defineProperty(ParentLetter$1, "__esModule", {
+         value: true
+       });
+       var unicode_arabic_1 = unicodeArabic;
+       var isArabic_1$1 = isArabic$1;
+       var reference_1 = reference;
 
-           for (var w = 0; w < reference.letterList.length; w++) {
-             // ok so we are checking this potential lettertron
-             var letterForms = unicodeArabic["default"][reference.letterList[w]];
-             var versions = Object.keys(letterForms);
+       function ParentLetter(letter) {
+         if (!isArabic_1$1.isArabic(letter)) {
+           throw new Error('Not an Arabic letter');
+         }
 
-             for (var v = 0; v < versions.length; v++) {
-               var localVersion = letterForms[versions[v]];
+         for (var w = 0; w < reference_1.letterList.length; w++) {
+           // ok so we are checking this potential lettertron
+           var letterForms = unicode_arabic_1["default"][reference_1.letterList[w]];
+           var versions = Object.keys(letterForms);
 
-               if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-                 // look at this embedded object
-                 var embeddedForms = Object.keys(localVersion);
+           for (var v = 0; v < versions.length; v++) {
+             var localVersion = letterForms[versions[v]];
 
-                 for (var ef = 0; ef < embeddedForms.length; ef++) {
-                   var form = localVersion[embeddedForms[ef]];
+             if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+               // look at this embedded object
+               var embeddedForms = Object.keys(localVersion);
 
-                   if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
-                     // match
-                     return localVersion;
-                   }
+               for (var ef = 0; ef < embeddedForms.length; ef++) {
+                 var form = localVersion[embeddedForms[ef]];
+
+                 if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                   // match
+                   return localVersion;
                  }
-               } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-                 // match
-                 return letterForms;
                }
+             } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+               // match
+               return letterForms;
              }
-
-             return null;
            }
+
+           return null;
          }
+       }
 
-         exports.ParentLetter = ParentLetter;
+       ParentLetter$1.ParentLetter = ParentLetter;
 
-         function GrandparentLetter(letter) {
-           if (!isArabic_1.isArabic(letter)) {
-             throw new Error('Not an Arabic letter');
-           }
+       function GrandparentLetter(letter) {
+         if (!isArabic_1$1.isArabic(letter)) {
+           throw new Error('Not an Arabic letter');
+         }
 
-           for (var w = 0; w < reference.letterList.length; w++) {
-             // ok so we are checking this potential lettertron
-             var letterForms = unicodeArabic["default"][reference.letterList[w]];
-             var versions = Object.keys(letterForms);
+         for (var w = 0; w < reference_1.letterList.length; w++) {
+           // ok so we are checking this potential lettertron
+           var letterForms = unicode_arabic_1["default"][reference_1.letterList[w]];
+           var versions = Object.keys(letterForms);
 
-             for (var v = 0; v < versions.length; v++) {
-               var localVersion = letterForms[versions[v]];
+           for (var v = 0; v < versions.length; v++) {
+             var localVersion = letterForms[versions[v]];
 
-               if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
-                 // look at this embedded object
-                 var embeddedForms = Object.keys(localVersion);
+             if (_typeof(localVersion) === 'object' && typeof localVersion.indexOf === 'undefined') {
+               // look at this embedded object
+               var embeddedForms = Object.keys(localVersion);
 
-                 for (var ef = 0; ef < embeddedForms.length; ef++) {
-                   var form = localVersion[embeddedForms[ef]];
+               for (var ef = 0; ef < embeddedForms.length; ef++) {
+                 var form = localVersion[embeddedForms[ef]];
 
-                   if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
-                     // match
-                     return letterForms;
-                   }
+                 if (form === letter || _typeof(form) === 'object' && form.indexOf && form.indexOf(letter) > -1) {
+                   // match
+                   return letterForms;
                  }
-               } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
-                 // match
-                 return letterForms;
                }
+             } else if (localVersion === letter || _typeof(localVersion) === 'object' && localVersion.indexOf && localVersion.indexOf(letter) > -1) {
+               // match
+               return letterForms;
              }
-
-             return null;
            }
-         }
 
-         exports.GrandparentLetter = GrandparentLetter;
-       });
+           return null;
+         }
+       }
 
-       var lib = createCommonjsModule(function (module, exports) {
+       ParentLetter$1.GrandparentLetter = GrandparentLetter;
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         exports.isArabic = isArabic_1.isArabic;
-         exports.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
-         exports.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
-         exports.Normal = Normalization.Normal;
-         exports.CharShaper = CharShaper_1.CharShaper;
-         exports.WordShaper = WordShaper_1.WordShaper;
-         exports.ParentLetter = ParentLetter_1.ParentLetter;
-         exports.GrandparentLetter = ParentLetter_1.GrandparentLetter;
+       Object.defineProperty(lib, "__esModule", {
+         value: true
        });
+       var isArabic_1 = isArabic$1;
+       lib.isArabic = isArabic_1.isArabic;
+       var GlyphSplitter_1 = GlyphSplitter$1;
+       lib.GlyphSplitter = GlyphSplitter_1.GlyphSplitter;
+       var BaselineSplitter_1 = BaselineSplitter$1;
+       lib.BaselineSplitter = BaselineSplitter_1.BaselineSplitter;
+       var Normalization_1 = Normalization;
+       lib.Normal = Normalization_1.Normal;
+       var CharShaper_1 = CharShaper$1;
+       lib.CharShaper = CharShaper_1.CharShaper;
+       var WordShaper_1 = WordShaper$2;
+       var WordShaper = lib.WordShaper = WordShaper_1.WordShaper;
+       var ParentLetter_1 = ParentLetter$1;
+       lib.ParentLetter = ParentLetter_1.ParentLetter;
+       lib.GrandparentLetter = ParentLetter_1.GrandparentLetter;
 
        var rtlRegex = /[\u0590-\u05FF\u0600-\u06FF\u0750-\u07BF\u08A0–\u08BF]/;
        function fixRTLTextForSvg(inputText) {
          var hebrewSign = /[\u0591-\u05bd\u05bf\u05c1-\u05c5\u05c7]/; // Arabic word shaping
 
          if (arabicRegex.test(inputText)) {
-           inputText = lib.WordShaper(inputText);
+           inputText = WordShaper(inputText);
          }
 
          for (var n = 0; n < inputText.length; n++) {
          return ret;
        }
 
-       var propertyIsEnumerable = objectPropertyIsEnumerable.f;
+       var DESCRIPTORS$2 = descriptors;
+       var uncurryThis$b = functionUncurryThis;
+       var objectKeys = objectKeys$4;
+       var toIndexedObject = toIndexedObject$c;
+       var $propertyIsEnumerable = objectPropertyIsEnumerable.f;
+
+       var propertyIsEnumerable = uncurryThis$b($propertyIsEnumerable);
+       var push$2 = uncurryThis$b([].push);
 
        // `Object.{ entries, values }` methods implementation
-       var createMethod$5 = function (TO_ENTRIES) {
+       var createMethod$1 = function (TO_ENTRIES) {
          return function (it) {
            var O = toIndexedObject(it);
            var keys = objectKeys(O);
            var key;
            while (length > i) {
              key = keys[i++];
-             if (!descriptors || propertyIsEnumerable.call(O, key)) {
-               result.push(TO_ENTRIES ? [key, O[key]] : O[key]);
+             if (!DESCRIPTORS$2 || propertyIsEnumerable(O, key)) {
+               push$2(result, TO_ENTRIES ? [key, O[key]] : O[key]);
              }
            }
            return result;
 
        var objectToArray = {
          // `Object.entries` method
-         // https://tc39.github.io/ecma262/#sec-object.entries
-         entries: createMethod$5(true),
+         // https://tc39.es/ecma262/#sec-object.entries
+         entries: createMethod$1(true),
          // `Object.values` method
-         // https://tc39.github.io/ecma262/#sec-object.values
-         values: createMethod$5(false)
+         // https://tc39.es/ecma262/#sec-object.values
+         values: createMethod$1(false)
        };
 
+       var $$r = _export;
        var $values = objectToArray.values;
 
        // `Object.values` method
-       // https://tc39.github.io/ecma262/#sec-object.values
-       _export({ target: 'Object', stat: true }, {
+       // https://tc39.es/ecma262/#sec-object.values
+       $$r({ target: 'Object', stat: true }, {
          values: function values(O) {
            return $values(O);
          }
              return delete s[k];
            }
          };
-       }(); //
+       }();
+
+       var _listeners = {}; //
        // corePreferences is an interface for persisting basic key-value strings
        // within and between iD sessions on the same site.
        //
 
+       /**
+        * @param {string} k
+        * @param {string?} v
+        * @returns {boolean} true if the action succeeded
+        */
 
        function corePreferences(k, v) {
          try {
-           if (arguments.length === 1) return _storage.getItem(k);else if (v === null) _storage.removeItem(k);else _storage.setItem(k, v);
+           if (v === undefined) return _storage.getItem(k);else if (v === null) _storage.removeItem(k);else _storage.setItem(k, v);
+
+           if (_listeners[k]) {
+             _listeners[k].forEach(function (handler) {
+               return handler(v);
+             });
+           }
+
+           return true;
          } catch (e) {
            /* eslint-disable no-console */
            if (typeof console !== 'undefined') {
            }
            /* eslint-enable no-console */
 
+
+           return false;
          }
-       }
+       } // adds an event listener which is triggered whenever
 
-       function responseText(response) {
-         if (!response.ok) throw new Error(response.status + " " + response.statusText);
-         return response.text();
-       }
 
-       function d3_text (input, init) {
-         return fetch(input, init).then(responseText);
-       }
+       corePreferences.onChange = function (k, handler) {
+         _listeners[k] = _listeners[k] || [];
 
-       function responseJson(response) {
-         if (!response.ok) throw new Error(response.status + " " + response.statusText);
-         if (response.status === 204 || response.status === 205) return;
-         return response.json();
-       }
+         _listeners[k].push(handler);
+       };
 
-       function d3_json (input, init) {
-         return fetch(input, init).then(responseJson);
-       }
+       var vparse = {exports: {}};
 
-       function parser(type) {
-         return function (input, init) {
-           return d3_text(input, init).then(function (text) {
-             return new DOMParser().parseFromString(text, type);
-           });
-         };
-       }
+       (function (module) {
+         (function (window) {
 
-       var d3_xml = parser("application/xml");
-       var svg = parser("image/svg+xml");
+           function parseVersion(v) {
+             var m = v.replace(/[^0-9.]/g, '').match(/[0-9]*\.|[0-9]+/g) || [];
+             v = {
+               major: +m[0] || 0,
+               minor: +m[1] || 0,
+               patch: +m[2] || 0,
+               build: +m[3] || 0
+             };
+             v.isEmpty = !v.major && !v.minor && !v.patch && !v.build;
+             v.parsed = [v.major, v.minor, v.patch, v.build];
+             v.text = v.parsed.join('.');
+             v.compare = compare;
+             return v;
+           }
+
+           function compare(v) {
+             if (typeof v === 'string') {
+               v = parseVersion(v);
+             }
+
+             for (var i = 0; i < 4; i++) {
+               if (this.parsed[i] !== v.parsed[i]) {
+                 return this.parsed[i] > v.parsed[i] ? 1 : -1;
+               }
+             }
+
+             return 0;
+           }
+           /* istanbul ignore next */
+
+
+           if (module && 'object' === 'object') {
+             module.exports = parseVersion;
+           } else {
+             window.parseVersion = parseVersion;
+           }
+         })(commonjsGlobal);
+       })(vparse);
+
+       var parseVersion = vparse.exports;
+
+       var name = "iD";
+       var version = "2.20.3";
+       var description = "A friendly editor for OpenStreetMap";
+       var main = "dist/iD.min.js";
+       var repository = "github:openstreetmap/iD";
+       var homepage = "https://github.com/openstreetmap/iD";
+       var bugs = "https://github.com/openstreetmap/iD/issues";
+       var keywords = ["editor","openstreetmap"];
+       var license = "ISC";
+       var scripts = {all:"npm-run-all -s clean build build:legacy dist",build:"npm-run-all -s build:css build:data build:dev","build:css":"node scripts/build_css.js","build:data":"shx mkdir -p dist/data && node scripts/build_data.js","build:dev":"rollup --config config/rollup.config.dev.js","build:legacy":"rollup --config config/rollup.config.legacy.js","build:stats":"rollup --config config/rollup.config.stats.js",clean:"shx rm -f dist/*.js dist/*.map dist/*.css dist/img/*.svg",dist:"npm-run-all -p dist:**","dist:mapillary":"shx mkdir -p dist/mapillary-js && shx cp -R node_modules/mapillary-js/dist/* dist/mapillary-js/","dist:pannellum":"shx mkdir -p dist/pannellum-streetside && shx cp -R node_modules/pannellum/build/* dist/pannellum-streetside/","dist:min:iD":"uglifyjs dist/iD.legacy.js --compress --mangle --output dist/iD.min.js","dist:svg:iD":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"iD-%s\" --symbol-sprite dist/img/iD-sprite.svg \"svg/iD-sprite/**/*.svg\"","dist:svg:community":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"community-%s\" --symbol-sprite dist/img/community-sprite.svg node_modules/osm-community-index/dist/img/*.svg","dist:svg:fa":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/fa-sprite.svg svg/fontawesome/*.svg","dist:svg:maki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"maki-%s\" --symbol-sprite dist/img/maki-sprite.svg node_modules/@mapbox/maki/icons/*.svg","dist:svg:mapillary:signs":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-sprite.svg node_modules/mapillary_sprite_source/package_signs/*.svg","dist:svg:mapillary:objects":"svg-sprite --symbol --symbol-dest . --symbol-sprite dist/img/mapillary-object-sprite.svg node_modules/mapillary_sprite_source/package_objects/*.svg","dist:svg:temaki":"svg-sprite --symbol --symbol-dest . --shape-id-generator \"temaki-%s\" --symbol-sprite dist/img/temaki-sprite.svg node_modules/@ideditor/temaki/icons/*.svg",imagery:"node scripts/update_imagery.js",lint:"eslint scripts test/spec modules","lint:fix":"eslint scripts test/spec modules --fix",start:"npm-run-all -s build start:server",quickstart:"npm-run-all -s build:dev start:server","start:server":"node scripts/server.js",test:"npm-run-all -s lint build test:spec","test:spec":"karma start karma.conf.js",translations:"node scripts/update_locales.js"};
+       var dependencies = {"@ideditor/country-coder":"~5.0.3","@ideditor/location-conflation":"~1.0.2","@mapbox/geojson-area":"^0.2.2","@mapbox/sexagesimal":"1.2.0","@mapbox/vector-tile":"^1.3.1","@tmcw/togeojson":"^4.5.0","@turf/bbox-clip":"^6.0.0","abortcontroller-polyfill":"^1.4.0","aes-js":"^3.1.2","alif-toolkit":"^1.2.9","core-js":"^3.6.5",diacritics:"1.3.0","fast-deep-equal":"~3.1.1","fast-json-stable-stringify":"2.1.0","lodash-es":"~4.17.15",marked:"~2.0.0","node-diff3":"2.1.0","osm-auth":"1.1.0",pannellum:"2.5.6",pbf:"^3.2.1","polygon-clipping":"~0.15.1",rbush:"3.0.1","whatwg-fetch":"^3.4.1","which-polygon":"2.2.0"};
+       var devDependencies = {"@babel/core":"^7.11.6","@babel/preset-env":"^7.11.5","@fortawesome/fontawesome-svg-core":"^1.2.32","@fortawesome/free-brands-svg-icons":"~5.15.1","@fortawesome/free-regular-svg-icons":"~5.15.1","@fortawesome/free-solid-svg-icons":"~5.15.1","@ideditor/temaki":"~5.0.0","@mapbox/maki":"^6.0.0","@rollup/plugin-babel":"^5.2.1","@rollup/plugin-commonjs":"^21.0.0","@rollup/plugin-json":"^4.0.1","@rollup/plugin-node-resolve":"~13.0.5",autoprefixer:"^10.0.1",btoa:"^1.2.1",chai:"^4.3.4","cldr-core":"37.0.0","cldr-localenames-full":"37.0.0",chalk:"^4.1.2","concat-files":"^0.1.1",d3:"~6.6.0","editor-layer-index":"github:osmlab/editor-layer-index#gh-pages",eslint:"^7.1.0","fetch-mock":"^9.11.0",gaze:"^1.1.3",glob:"^7.1.0",happen:"^0.3.2","js-yaml":"^4.0.0","json-stringify-pretty-compact":"^3.0.0",karma:"^6.3.5","karma-chrome-launcher":"^3.1.0","karma-coverage":"^2.0.3","karma-mocha":"^2.0.1","karma-remap-istanbul":"^0.6.0",mapillary_sprite_source:"^1.8.0","mapillary-js":"4.0.0",minimist:"^1.2.3",mocha:"^8.4.0","name-suggestion-index":"~6.0","node-fetch":"^2.6.1","npm-run-all":"^4.0.0","object-inspect":"1.10.3","osm-community-index":"~5.1.0",postcss:"^8.1.1","postcss-selector-prepend":"^0.5.0",rollup:"~2.52.8","rollup-plugin-includepaths":"~0.2.3","rollup-plugin-progress":"^1.1.1","rollup-plugin-visualizer":"~4.2.0",shelljs:"^0.8.0",shx:"^0.3.0",sinon:"^11.1.2","sinon-chai":"^3.7.0",smash:"0.0","static-server":"^2.2.1","svg-sprite":"1.5.1","uglify-js":"~3.13.0",vparse:"~1.1.0"};
+       var engines = {node:">=10"};
+       var browserslist = ["> 0.2%, last 6 major versions, Firefox ESR, IE 11, maintained node versions"];
+       var packageJSON = {
+       name: name,
+       version: version,
+       description: description,
+       main: main,
+       repository: repository,
+       homepage: homepage,
+       bugs: bugs,
+       keywords: keywords,
+       license: license,
+       scripts: scripts,
+       dependencies: dependencies,
+       devDependencies: devDependencies,
+       engines: engines,
+       browserslist: browserslist
+       };
 
        var _mainFileFetcher = coreFileFetcher(); // singleton
        // coreFileFetcher asynchronously fetches data from JSON files
        //
 
        function coreFileFetcher() {
+         var ociVersion = packageJSON.devDependencies['osm-community-index'];
+         var v = parseVersion(ociVersion);
+         var vMinor = "".concat(v.major, ".").concat(v.minor);
          var _this = {};
          var _inflight = {};
          var _fileMap = {
            'address_formats': 'data/address_formats.min.json',
-           'deprecated': 'data/deprecated.min.json',
-           'discarded': 'data/discarded.min.json',
+           'deprecated': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/deprecated.min.json',
+           'discarded': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/discarded.min.json',
            'imagery': 'data/imagery.min.json',
            'intro_graph': 'data/intro_graph.min.json',
            'keepRight': 'data/keepRight.min.json',
            'languages': 'data/languages.min.json',
-           'locales': 'data/locales.min.json',
-           'nsi_brands': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/brands.min.json',
-           'nsi_filters': 'https://cdn.jsdelivr.net/npm/name-suggestion-index@4/dist/filters.min.json',
-           'oci_features': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/features.min.json',
-           'oci_resources': 'https://cdn.jsdelivr.net/npm/osm-community-index@2/dist/resources.min.json',
-           'preset_categories': 'data/preset_categories.min.json',
-           'preset_defaults': 'data/preset_defaults.min.json',
-           'preset_fields': 'data/preset_fields.min.json',
-           'preset_presets': 'data/preset_presets.min.json',
+           'locales': 'locales/index.min.json',
+           'oci_defaults': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/defaults.min.json"),
+           'oci_features': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/featureCollection.min.json"),
+           'oci_resources': "https://cdn.jsdelivr.net/npm/osm-community-index@".concat(vMinor, "/dist/resources.min.json"),
+           'preset_categories': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_categories.min.json',
+           'preset_defaults': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/preset_defaults.min.json',
+           'preset_fields': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/fields.min.json',
+           'preset_presets': 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/presets.min.json',
            'phone_formats': 'data/phone_formats.min.json',
            'qa_data': 'data/qa_data.min.json',
            'shortcuts': 'data/shortcuts.min.json',
            var prom = _inflight[url];
 
            if (!prom) {
-             _inflight[url] = prom = d3_json(url).then(function (result) {
+             _inflight[url] = prom = fetch(url).then(function (response) {
+               // fetch in PhantomJS tests may return ok=false and status=0 even if it's okay
+               if (!response.ok && response.status !== 0 || !response.json) {
+                 throw new Error(response.status + ' ' + response.statusText);
+               }
+
+               if (response.status === 204 || response.status === 205) return; // No Content, Reset Content
+
+               return response.json();
+             }).then(function (result) {
                delete _inflight[url];
 
                if (!result) {
          return _this;
        }
 
-       var $findIndex$1 = arrayIteration.findIndex;
-
+       var global$9 = global$1m;
+       var toIntegerOrInfinity$1 = toIntegerOrInfinity$b;
+       var toString$7 = toString$k;
+       var requireObjectCoercible$6 = requireObjectCoercible$e;
 
+       var RangeError$5 = global$9.RangeError;
 
-       var FIND_INDEX = 'findIndex';
-       var SKIPS_HOLES$1 = true;
+       // `String.prototype.repeat` method implementation
+       // https://tc39.es/ecma262/#sec-string.prototype.repeat
+       var stringRepeat = function repeat(count) {
+         var str = toString$7(requireObjectCoercible$6(this));
+         var result = '';
+         var n = toIntegerOrInfinity$1(count);
+         if (n < 0 || n == Infinity) throw RangeError$5('Wrong number of repetitions');
+         for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;
+         return result;
+       };
 
-       var USES_TO_LENGTH$b = arrayMethodUsesToLength(FIND_INDEX);
+       var $$q = _export;
+       var global$8 = global$1m;
+       var uncurryThis$a = functionUncurryThis;
+       var toIntegerOrInfinity = toIntegerOrInfinity$b;
+       var thisNumberValue$1 = thisNumberValue$3;
+       var $repeat$1 = stringRepeat;
+       var fails$7 = fails$S;
 
-       // Shouldn't skip holes
-       if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES$1 = false; });
+       var RangeError$4 = global$8.RangeError;
+       var String$1 = global$8.String;
+       var floor$2 = Math.floor;
+       var repeat$2 = uncurryThis$a($repeat$1);
+       var stringSlice$3 = uncurryThis$a(''.slice);
+       var un$ToFixed = uncurryThis$a(1.0.toFixed);
 
-       // `Array.prototype.findIndex` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.findindex
-       _export({ target: 'Array', proto: true, forced: SKIPS_HOLES$1 || !USES_TO_LENGTH$b }, {
-         findIndex: function findIndex(callbackfn /* , that = undefined */) {
-           return $findIndex$1(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
-         }
-       });
+       var pow$1 = function (x, n, acc) {
+         return n === 0 ? acc : n % 2 === 1 ? pow$1(x, n - 1, acc * x) : pow$1(x * x, n / 2, acc);
+       };
 
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables(FIND_INDEX);
-
-       var $includes$1 = arrayIncludes.includes;
-
-
-
-       var USES_TO_LENGTH$c = arrayMethodUsesToLength('indexOf', { ACCESSORS: true, 1: 0 });
-
-       // `Array.prototype.includes` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.includes
-       _export({ target: 'Array', proto: true, forced: !USES_TO_LENGTH$c }, {
-         includes: function includes(el /* , fromIndex = 0 */) {
-           return $includes$1(this, el, arguments.length > 1 ? arguments[1] : undefined);
+       var log = function (x) {
+         var n = 0;
+         var x2 = x;
+         while (x2 >= 4096) {
+           n += 12;
+           x2 /= 4096;
          }
-       });
-
-       // https://tc39.github.io/ecma262/#sec-array.prototype-@@unscopables
-       addToUnscopables('includes');
-
-       var notARegexp = function (it) {
-         if (isRegexp(it)) {
-           throw TypeError("The method doesn't accept regular expressions");
-         } return it;
+         while (x2 >= 2) {
+           n += 1;
+           x2 /= 2;
+         } return n;
        };
 
-       var MATCH$2 = wellKnownSymbol('match');
-
-       var correctIsRegexpLogic = function (METHOD_NAME) {
-         var regexp = /./;
-         try {
-           '/./'[METHOD_NAME](regexp);
-         } catch (e) {
-           try {
-             regexp[MATCH$2] = false;
-             return '/./'[METHOD_NAME](regexp);
-           } catch (f) { /* empty */ }
-         } return false;
+       var multiply = function (data, n, c) {
+         var index = -1;
+         var c2 = c;
+         while (++index < 6) {
+           c2 += n * data[index];
+           data[index] = c2 % 1e7;
+           c2 = floor$2(c2 / 1e7);
+         }
        };
 
-       // `String.prototype.includes` method
-       // https://tc39.github.io/ecma262/#sec-string.prototype.includes
-       _export({ target: 'String', proto: true, forced: !correctIsRegexpLogic('includes') }, {
-         includes: function includes(searchString /* , position = 0 */) {
-           return !!~String(requireObjectCoercible(this))
-             .indexOf(notARegexp(searchString), arguments.length > 1 ? arguments[1] : undefined);
+       var divide = function (data, n) {
+         var index = 6;
+         var c = 0;
+         while (--index >= 0) {
+           c += data[index];
+           data[index] = floor$2(c / n);
+           c = (c % n) * 1e7;
          }
-       });
-
-       var _detected;
-
-       function utilDetect(refresh) {
-         if (_detected && !refresh) return _detected;
-         _detected = {};
-         var ua = navigator.userAgent;
-         var m = null;
-         /* Browser */
+       };
 
-         m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge
+       var dataToString = function (data) {
+         var index = 6;
+         var s = '';
+         while (--index >= 0) {
+           if (s !== '' || index === 0 || data[index] !== 0) {
+             var t = String$1(data[index]);
+             s = s === '' ? t : s + repeat$2('0', 7 - t.length) + t;
+           }
+         } return s;
+       };
 
-         if (m !== null) {
-           _detected.browser = m[1];
-           _detected.version = m[2];
-         }
+       var FORCED$6 = fails$7(function () {
+         return un$ToFixed(0.00008, 3) !== '0.000' ||
+           un$ToFixed(0.9, 0) !== '1' ||
+           un$ToFixed(1.255, 2) !== '1.25' ||
+           un$ToFixed(1000000000000000128.0, 0) !== '1000000000000000128';
+       }) || !fails$7(function () {
+         // V8 ~ Android 4.3-
+         un$ToFixed({});
+       });
 
-         if (!_detected.browser) {
-           m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11
+       // `Number.prototype.toFixed` method
+       // https://tc39.es/ecma262/#sec-number.prototype.tofixed
+       $$q({ target: 'Number', proto: true, forced: FORCED$6 }, {
+         toFixed: function toFixed(fractionDigits) {
+           var number = thisNumberValue$1(this);
+           var fractDigits = toIntegerOrInfinity(fractionDigits);
+           var data = [0, 0, 0, 0, 0, 0];
+           var sign = '';
+           var result = '0';
+           var e, z, j, k;
 
-           if (m !== null) {
-             _detected.browser = 'msie';
-             _detected.version = m[1];
+           if (fractDigits < 0 || fractDigits > 20) throw RangeError$4('Incorrect fraction digits');
+           // eslint-disable-next-line no-self-compare -- NaN check
+           if (number != number) return 'NaN';
+           if (number <= -1e21 || number >= 1e21) return String$1(number);
+           if (number < 0) {
+             sign = '-';
+             number = -number;
            }
-         }
-
-         if (!_detected.browser) {
-           m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+
-
-           if (m !== null) {
-             _detected.browser = 'Opera';
-             _detected.version = m[2];
+           if (number > 1e-21) {
+             e = log(number * pow$1(2, 69, 1)) - 69;
+             z = e < 0 ? number * pow$1(2, -e, 1) : number / pow$1(2, e, 1);
+             z *= 0x10000000000000;
+             e = 52 - e;
+             if (e > 0) {
+               multiply(data, 0, z);
+               j = fractDigits;
+               while (j >= 7) {
+                 multiply(data, 1e7, 0);
+                 j -= 7;
+               }
+               multiply(data, pow$1(10, j, 1), 0);
+               j = e - 1;
+               while (j >= 23) {
+                 divide(data, 1 << 23);
+                 j -= 23;
+               }
+               divide(data, 1 << j);
+               multiply(data, 1, 1);
+               divide(data, 2);
+               result = dataToString(data);
+             } else {
+               multiply(data, 0, z);
+               multiply(data, 1 << -e, 0);
+               result = dataToString(data) + repeat$2('0', fractDigits);
+             }
            }
+           if (fractDigits > 0) {
+             k = result.length;
+             result = sign + (k <= fractDigits
+               ? '0.' + repeat$2('0', fractDigits - k) + result
+               : stringSlice$3(result, 0, k - fractDigits) + '.' + stringSlice$3(result, k - fractDigits));
+           } else {
+             result = sign + result;
+           } return result;
          }
+       });
 
-         if (!_detected.browser) {
-           m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
+       var global$7 = global$1m;
 
-           if (m !== null) {
-             _detected.browser = m[1];
-             _detected.version = m[2];
-             m = ua.match(/version\/([\.\d]+)/i);
-             if (m !== null) _detected.version = m[1];
-           }
-         }
+       var globalIsFinite = global$7.isFinite;
 
-         if (!_detected.browser) {
-           _detected.browser = navigator.appName;
-           _detected.version = navigator.appVersion;
-         } // keep major.minor version only..
+       // `Number.isFinite` method
+       // https://tc39.es/ecma262/#sec-number.isfinite
+       // eslint-disable-next-line es/no-number-isfinite -- safe
+       var numberIsFinite$1 = Number.isFinite || function isFinite(it) {
+         return typeof it == 'number' && globalIsFinite(it);
+       };
 
+       var $$p = _export;
+       var numberIsFinite = numberIsFinite$1;
 
-         _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
-         // Legacy Opera has incomplete svg style support. See #715
+       // `Number.isFinite` method
+       // https://tc39.es/ecma262/#sec-number.isfinite
+       $$p({ target: 'Number', stat: true }, { isFinite: numberIsFinite });
 
-         _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;
+       var $$o = _export;
+       var global$6 = global$1m;
+       var uncurryThis$9 = functionUncurryThis;
+       var toAbsoluteIndex = toAbsoluteIndex$8;
 
-         if (_detected.browser.toLowerCase() === 'msie') {
-           _detected.ie = true;
-           _detected.browser = 'Internet Explorer';
-           _detected.support = parseFloat(_detected.version) >= 11;
-         } else {
-           _detected.ie = false;
-           _detected.support = true;
-         }
+       var RangeError$3 = global$6.RangeError;
+       var fromCharCode$1 = String.fromCharCode;
+       // eslint-disable-next-line es/no-string-fromcodepoint -- required for testing
+       var $fromCodePoint = String.fromCodePoint;
+       var join$2 = uncurryThis$9([].join);
 
-         _detected.filedrop = window.FileReader && 'ondrop' in window;
-         _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-         _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
-         /* Platform */
+       // length should be 1, old FF problem
+       var INCORRECT_LENGTH = !!$fromCodePoint && $fromCodePoint.length != 1;
 
-         if (/Win/.test(ua)) {
-           _detected.os = 'win';
-           _detected.platform = 'Windows';
-         } else if (/Mac/.test(ua)) {
-           _detected.os = 'mac';
-           _detected.platform = 'Macintosh';
-         } else if (/X11/.test(ua) || /Linux/.test(ua)) {
-           _detected.os = 'linux';
-           _detected.platform = 'Linux';
-         } else {
-           _detected.os = 'win';
-           _detected.platform = 'Unknown';
+       // `String.fromCodePoint` method
+       // https://tc39.es/ecma262/#sec-string.fromcodepoint
+       $$o({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         fromCodePoint: function fromCodePoint(x) {
+           var elements = [];
+           var length = arguments.length;
+           var i = 0;
+           var code;
+           while (length > i) {
+             code = +arguments[i++];
+             if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError$3(code + ' is not a valid code point');
+             elements[i] = code < 0x10000
+               ? fromCharCode$1(code)
+               : fromCharCode$1(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00);
+           } return join$2(elements, '');
          }
+       });
 
-         _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) || // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
-         // so assume any "mac" with multitouch is actually iOS
-         navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1) && /WebKit/.test(ua) && !/Edge/.test(ua) && !window.MSStream;
-         /* Locale */
-         // An array of locales requested by the browser in priority order.
-
-         _detected.browserLocales = Array.from(new Set( // remove duplicates
-         [navigator.language].concat(navigator.languages || []).concat([// old property for backwards compatibility
-         navigator.userLanguage]) // remove any undefined values
-         .filter(Boolean)));
-         /* Host */
+       var call$2 = functionCall;
+       var fixRegExpWellKnownSymbolLogic = fixRegexpWellKnownSymbolLogic;
+       var anObject = anObject$n;
+       var requireObjectCoercible$5 = requireObjectCoercible$e;
+       var sameValue = sameValue$1;
+       var toString$6 = toString$k;
+       var getMethod = getMethod$7;
+       var regExpExec = regexpExecAbstract;
 
-         var loc = window.top.location;
-         var origin = loc.origin;
+       // @@search logic
+       fixRegExpWellKnownSymbolLogic('search', function (SEARCH, nativeSearch, maybeCallNative) {
+         return [
+           // `String.prototype.search` method
+           // https://tc39.es/ecma262/#sec-string.prototype.search
+           function search(regexp) {
+             var O = requireObjectCoercible$5(this);
+             var searcher = regexp == undefined ? undefined : getMethod(regexp, SEARCH);
+             return searcher ? call$2(searcher, regexp, O) : new RegExp(regexp)[SEARCH](toString$6(O));
+           },
+           // `RegExp.prototype[@@search]` method
+           // https://tc39.es/ecma262/#sec-regexp.prototype-@@search
+           function (string) {
+             var rx = anObject(this);
+             var S = toString$6(string);
+             var res = maybeCallNative(nativeSearch, rx, S);
 
-         if (!origin) {
-           // for unpatched IE11
-           origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
-         }
+             if (res.done) return res.value;
 
-         _detected.host = origin + loc.pathname;
-         return _detected;
-       }
+             var previousLastIndex = rx.lastIndex;
+             if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
+             var result = regExpExec(rx, S);
+             if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
+             return result === null ? -1 : result.index;
+           }
+         ];
+       });
 
-       var getOwnPropertyNames$2 = objectGetOwnPropertyNames.f;
-       var getOwnPropertyDescriptor$3 = objectGetOwnPropertyDescriptor.f;
-       var defineProperty$a = objectDefineProperty.f;
-       var trim$2 = stringTrim.trim;
+       var rbush$2 = {exports: {}};
 
-       var NUMBER = 'Number';
-       var NativeNumber = global_1[NUMBER];
-       var NumberPrototype = NativeNumber.prototype;
+       var quickselect$2 = {exports: {}};
 
-       // Opera ~12 has broken Object#toString
-       var BROKEN_CLASSOF = classofRaw(objectCreate(NumberPrototype)) == NUMBER;
+       (function (module, exports) {
+         (function (global, factory) {
+           module.exports = factory() ;
+         })(commonjsGlobal, function () {
 
-       // `ToNumber` abstract operation
-       // https://tc39.github.io/ecma262/#sec-tonumber
-       var toNumber = function (argument) {
-         var it = toPrimitive(argument, false);
-         var first, third, radix, maxCode, digits, length, index, code;
-         if (typeof it == 'string' && it.length > 2) {
-           it = trim$2(it);
-           first = it.charCodeAt(0);
-           if (first === 43 || first === 45) {
-             third = it.charCodeAt(2);
-             if (third === 88 || third === 120) return NaN; // Number('+0x1') should be NaN, old V8 fix
-           } else if (first === 48) {
-             switch (it.charCodeAt(1)) {
-               case 66: case 98: radix = 2; maxCode = 49; break; // fast equal of /^0b[01]+$/i
-               case 79: case 111: radix = 8; maxCode = 55; break; // fast equal of /^0o[0-7]+$/i
-               default: return +it;
-             }
-             digits = it.slice(2);
-             length = digits.length;
-             for (index = 0; index < length; index++) {
-               code = digits.charCodeAt(index);
-               // parseInt parses a string to a first unavailable symbol
-               // but ToNumber should return NaN if a string contains unavailable symbols
-               if (code < 48 || code > maxCode) return NaN;
-             } return parseInt(digits, radix);
+           function quickselect(arr, k, left, right, compare) {
+             quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
            }
-         } return +it;
-       };
 
-       // `Number` constructor
-       // https://tc39.github.io/ecma262/#sec-number-constructor
-       if (isForced_1(NUMBER, !NativeNumber(' 0o1') || !NativeNumber('0b1') || NativeNumber('+0x1'))) {
-         var NumberWrapper = function Number(value) {
-           var it = arguments.length < 1 ? 0 : value;
-           var dummy = this;
-           return dummy instanceof NumberWrapper
-             // check on 1..constructor(foo) case
-             && (BROKEN_CLASSOF ? fails(function () { NumberPrototype.valueOf.call(dummy); }) : classofRaw(dummy) != NUMBER)
-               ? inheritIfRequired(new NativeNumber(toNumber(it)), dummy, NumberWrapper) : toNumber(it);
-         };
-         for (var keys$3 = descriptors ? getOwnPropertyNames$2(NativeNumber) : (
-           // ES3:
-           'MAX_VALUE,MIN_VALUE,NaN,NEGATIVE_INFINITY,POSITIVE_INFINITY,' +
-           // ES2015 (in case, if modules with ES2015 Number statics required before):
-           'EPSILON,isFinite,isInteger,isNaN,isSafeInteger,MAX_SAFE_INTEGER,' +
-           'MIN_SAFE_INTEGER,parseFloat,parseInt,isInteger'
-         ).split(','), j$2 = 0, key$1; keys$3.length > j$2; j$2++) {
-           if (has(NativeNumber, key$1 = keys$3[j$2]) && !has(NumberWrapper, key$1)) {
-             defineProperty$a(NumberWrapper, key$1, getOwnPropertyDescriptor$3(NativeNumber, key$1));
-           }
-         }
-         NumberWrapper.prototype = NumberPrototype;
-         NumberPrototype.constructor = NumberWrapper;
-         redefine(global_1, NUMBER, NumberWrapper);
-       }
+           function quickselectStep(arr, k, left, right, compare) {
+             while (right > left) {
+               if (right - left > 600) {
+                 var n = right - left + 1;
+                 var m = k - left + 1;
+                 var z = Math.log(n);
+                 var s = 0.5 * Math.exp(2 * z / 3);
+                 var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+                 var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+                 var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+                 quickselectStep(arr, k, newLeft, newRight, compare);
+               }
 
-       // `Number.MAX_SAFE_INTEGER` constant
-       // https://tc39.github.io/ecma262/#sec-number.max_safe_integer
-       _export({ target: 'Number', stat: true }, {
-         MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
-       });
+               var t = arr[k];
+               var i = left;
+               var j = right;
+               swap(arr, left, k);
+               if (compare(arr[right], t) > 0) swap(arr, left, right);
 
-       var aesJs = createCommonjsModule(function (module, exports) {
-         /*! MIT License. Copyright 2015-2018 Richard Moore <me@ricmoo.com>. See LICENSE.txt. */
-         (function (root) {
+               while (i < j) {
+                 swap(arr, i, j);
+                 i++;
+                 j--;
 
-           function checkInt(value) {
-             return parseInt(value) === value;
-           }
+                 while (compare(arr[i], t) < 0) {
+                   i++;
+                 }
 
-           function checkInts(arrayish) {
-             if (!checkInt(arrayish.length)) {
-               return false;
-             }
+                 while (compare(arr[j], t) > 0) {
+                   j--;
+                 }
+               }
 
-             for (var i = 0; i < arrayish.length; i++) {
-               if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
-                 return false;
+               if (compare(arr[left], t) === 0) swap(arr, left, j);else {
+                 j++;
+                 swap(arr, j, right);
                }
+               if (j <= k) left = j + 1;
+               if (k <= j) right = j - 1;
              }
+           }
 
-             return true;
+           function swap(arr, i, j) {
+             var tmp = arr[i];
+             arr[i] = arr[j];
+             arr[j] = tmp;
            }
 
-           function coerceArray(arg, copy) {
-             // ArrayBuffer view
-             if (arg.buffer && arg.name === 'Uint8Array') {
-               if (copy) {
-                 if (arg.slice) {
-                   arg = arg.slice();
-                 } else {
-                   arg = Array.prototype.slice.call(arg);
-                 }
-               }
+           function defaultCompare(a, b) {
+             return a < b ? -1 : a > b ? 1 : 0;
+           }
 
-               return arg;
-             } // It's an array; check it is a valid representation of a byte
+           return quickselect;
+         });
+       })(quickselect$2);
 
+       rbush$2.exports = rbush$1;
 
-             if (Array.isArray(arg)) {
-               if (!checkInts(arg)) {
-                 throw new Error('Array contains invalid value: ' + arg);
-               }
+       rbush$2.exports["default"] = rbush$1;
 
-               return new Uint8Array(arg);
-             } // Something else, but behaves like an array (maybe a Buffer? Arguments?)
+       var quickselect$1 = quickselect$2.exports;
 
+       function rbush$1(maxEntries, format) {
+         if (!(this instanceof rbush$1)) return new rbush$1(maxEntries, format); // max entries in a node is 9 by default; min node fill is 40% for best performance
 
-             if (checkInt(arg.length) && checkInts(arg)) {
-               return new Uint8Array(arg);
-             }
+         this._maxEntries = Math.max(4, maxEntries || 9);
+         this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
 
-             throw new Error('unsupported array-like object');
-           }
+         if (format) {
+           this._initFormat(format);
+         }
 
-           function createArray(length) {
-             return new Uint8Array(length);
-           }
+         this.clear();
+       }
 
-           function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
-             if (sourceStart != null || sourceEnd != null) {
-               if (sourceArray.slice) {
-                 sourceArray = sourceArray.slice(sourceStart, sourceEnd);
-               } else {
-                 sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
+       rbush$1.prototype = {
+         all: function all() {
+           return this._all(this.data, []);
+         },
+         search: function search(bbox) {
+           var node = this.data,
+               result = [],
+               toBBox = this.toBBox;
+           if (!intersects$1(bbox, node)) return result;
+           var nodesToSearch = [],
+               i,
+               len,
+               child,
+               childBBox;
+
+           while (node) {
+             for (i = 0, len = node.children.length; i < len; i++) {
+               child = node.children[i];
+               childBBox = node.leaf ? toBBox(child) : child;
+
+               if (intersects$1(bbox, childBBox)) {
+                 if (node.leaf) result.push(child);else if (contains$1(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
                }
              }
 
-             targetArray.set(sourceArray, targetStart);
+             node = nodesToSearch.pop();
            }
 
-           var convertUtf8 = function () {
-             function toBytes(text) {
-               var result = [],
-                   i = 0;
-               text = encodeURI(text);
+           return result;
+         },
+         collides: function collides(bbox) {
+           var node = this.data,
+               toBBox = this.toBBox;
+           if (!intersects$1(bbox, node)) return false;
+           var nodesToSearch = [],
+               i,
+               len,
+               child,
+               childBBox;
 
-               while (i < text.length) {
-                 var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value
+           while (node) {
+             for (i = 0, len = node.children.length; i < len; i++) {
+               child = node.children[i];
+               childBBox = node.leaf ? toBBox(child) : child;
 
-                 if (c === 37) {
-                   result.push(parseInt(text.substr(i, 2), 16));
-                   i += 2; // otherwise, just the actual byte
-                 } else {
-                   result.push(c);
-                 }
+               if (intersects$1(bbox, childBBox)) {
+                 if (node.leaf || contains$1(bbox, childBBox)) return true;
+                 nodesToSearch.push(child);
                }
-
-               return coerceArray(result);
              }
 
-             function fromBytes(bytes) {
-               var result = [],
-                   i = 0;
-
-               while (i < bytes.length) {
-                 var c = bytes[i];
+             node = nodesToSearch.pop();
+           }
 
-                 if (c < 128) {
-                   result.push(String.fromCharCode(c));
-                   i++;
-                 } else if (c > 191 && c < 224) {
-                   result.push(String.fromCharCode((c & 0x1f) << 6 | bytes[i + 1] & 0x3f));
-                   i += 2;
-                 } else {
-                   result.push(String.fromCharCode((c & 0x0f) << 12 | (bytes[i + 1] & 0x3f) << 6 | bytes[i + 2] & 0x3f));
-                   i += 3;
-                 }
-               }
+           return false;
+         },
+         load: function load(data) {
+           if (!(data && data.length)) return this;
 
-               return result.join('');
+           if (data.length < this._minEntries) {
+             for (var i = 0, len = data.length; i < len; i++) {
+               this.insert(data[i]);
              }
 
-             return {
-               toBytes: toBytes,
-               fromBytes: fromBytes
-             };
-           }();
-
-           var convertHex = function () {
-             function toBytes(text) {
-               var result = [];
+             return this;
+           } // recursively build the tree with the given data from scratch using OMT algorithm
 
-               for (var i = 0; i < text.length; i += 2) {
-                 result.push(parseInt(text.substr(i, 2), 16));
-               }
 
-               return result;
-             } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
+           var node = this._build(data.slice(), 0, data.length - 1, 0);
 
+           if (!this.data.children.length) {
+             // save as is if tree is empty
+             this.data = node;
+           } else if (this.data.height === node.height) {
+             // split root if trees have the same height
+             this._splitRoot(this.data, node);
+           } else {
+             if (this.data.height < node.height) {
+               // swap trees if inserted one is bigger
+               var tmpNode = this.data;
+               this.data = node;
+               node = tmpNode;
+             } // insert the small tree into the large tree at appropriate level
 
-             var Hex = '0123456789abcdef';
 
-             function fromBytes(bytes) {
-               var result = [];
+             this._insert(node, this.data.height - node.height - 1, true);
+           }
 
-               for (var i = 0; i < bytes.length; i++) {
-                 var v = bytes[i];
-                 result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
-               }
+           return this;
+         },
+         insert: function insert(item) {
+           if (item) this._insert(item, this.data.height - 1);
+           return this;
+         },
+         clear: function clear() {
+           this.data = createNode$1([]);
+           return this;
+         },
+         remove: function remove(item, equalsFn) {
+           if (!item) return this;
+           var node = this.data,
+               bbox = this.toBBox(item),
+               path = [],
+               indexes = [],
+               i,
+               parent,
+               index,
+               goingUp; // depth-first iterative tree traversal
 
-               return result.join('');
+           while (node || path.length) {
+             if (!node) {
+               // go up
+               node = path.pop();
+               parent = path[path.length - 1];
+               i = indexes.pop();
+               goingUp = true;
              }
 
-             return {
-               toBytes: toBytes,
-               fromBytes: fromBytes
-             };
-           }(); // Number of rounds by keysize
+             if (node.leaf) {
+               // check current node
+               index = findItem$1(item, node.children, equalsFn);
 
+               if (index !== -1) {
+                 // item found, remove the item and condense tree upwards
+                 node.children.splice(index, 1);
+                 path.push(node);
 
-           var numberOfRounds = {
-             16: 10,
-             24: 12,
-             32: 14
-           }; // Round constant words
+                 this._condense(path);
 
-           var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91]; // S-box and Inverse S-box (S is for Substitution)
+                 return this;
+               }
+             }
 
-           var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
-           var Si = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d]; // Transformations for encryption
+             if (!goingUp && !node.leaf && contains$1(node, bbox)) {
+               // go down
+               path.push(node);
+               indexes.push(i);
+               i = 0;
+               parent = node;
+               node = node.children[0];
+             } else if (parent) {
+               // go right
+               i++;
+               node = parent.children[i];
+               goingUp = false;
+             } else node = null; // nothing found
 
-           var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
-           var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
-           var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
-           var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c]; // Transformations for decryption
-
-           var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
-           var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
-           var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
-           var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0]; // Transformations for decryption key expansion
+           }
 
-           var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
-           var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
-           var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
-           var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];
+           return this;
+         },
+         toBBox: function toBBox(item) {
+           return item;
+         },
+         compareMinX: compareNodeMinX$1,
+         compareMinY: compareNodeMinY$1,
+         toJSON: function toJSON() {
+           return this.data;
+         },
+         fromJSON: function fromJSON(data) {
+           this.data = data;
+           return this;
+         },
+         _all: function _all(node, result) {
+           var nodesToSearch = [];
 
-           function convertToInt32(bytes) {
-             var result = [];
+           while (node) {
+             if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
+             node = nodesToSearch.pop();
+           }
 
-             for (var i = 0; i < bytes.length; i += 4) {
-               result.push(bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]);
-             }
+           return result;
+         },
+         _build: function _build(items, left, right, height) {
+           var N = right - left + 1,
+               M = this._maxEntries,
+               node;
 
-             return result;
+           if (N <= M) {
+             // reached leaf level; return leaf
+             node = createNode$1(items.slice(left, right + 1));
+             calcBBox$1(node, this.toBBox);
+             return node;
            }
 
-           var AES = function AES(key) {
-             if (!(this instanceof AES)) {
-               throw Error('AES must be instanitated with `new`');
-             }
-
-             Object.defineProperty(this, 'key', {
-               value: coerceArray(key, true)
-             });
+           if (!height) {
+             // target height of the bulk-loaded tree
+             height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
 
-             this._prepare();
-           };
+             M = Math.ceil(N / Math.pow(M, height - 1));
+           }
 
-           AES.prototype._prepare = function () {
-             var rounds = numberOfRounds[this.key.length];
+           node = createNode$1([]);
+           node.leaf = false;
+           node.height = height; // split the items into M mostly square tiles
 
-             if (rounds == null) {
-               throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
-             } // encryption round keys
+           var N2 = Math.ceil(N / M),
+               N1 = N2 * Math.ceil(Math.sqrt(M)),
+               i,
+               j,
+               right2,
+               right3;
+           multiSelect$1(items, left, right, N1, this.compareMinX);
 
+           for (i = left; i <= right; i += N1) {
+             right2 = Math.min(i + N1 - 1, right);
+             multiSelect$1(items, i, right2, N2, this.compareMinY);
 
-             this._Ke = []; // decryption round keys
+             for (j = i; j <= right2; j += N2) {
+               right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-             this._Kd = [];
+               node.children.push(this._build(items, j, right3, height - 1));
+             }
+           }
 
-             for (var i = 0; i <= rounds; i++) {
-               this._Ke.push([0, 0, 0, 0]);
+           calcBBox$1(node, this.toBBox);
+           return node;
+         },
+         _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
+           var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
 
-               this._Kd.push([0, 0, 0, 0]);
-             }
+           while (true) {
+             path.push(node);
+             if (node.leaf || path.length - 1 === level) break;
+             minArea = minEnlargement = Infinity;
 
-             var roundKeyCount = (rounds + 1) * 4;
-             var KC = this.key.length / 4; // convert the key into ints
+             for (i = 0, len = node.children.length; i < len; i++) {
+               child = node.children[i];
+               area = bboxArea$1(child);
+               enlargement = enlargedArea$1(bbox, child) - area; // choose entry with the least area enlargement
 
-             var tk = convertToInt32(this.key); // copy values into round key arrays
+               if (enlargement < minEnlargement) {
+                 minEnlargement = enlargement;
+                 minArea = area < minArea ? area : minArea;
+                 targetNode = child;
+               } else if (enlargement === minEnlargement) {
+                 // otherwise choose one with the smallest area
+                 if (area < minArea) {
+                   minArea = area;
+                   targetNode = child;
+                 }
+               }
+             }
 
-             var index;
+             node = targetNode || node.children[0];
+           }
 
-             for (var i = 0; i < KC; i++) {
-               index = i >> 2;
-               this._Ke[index][i % 4] = tk[i];
-               this._Kd[rounds - index][i % 4] = tk[i];
-             } // key expansion (fips-197 section 5.2)
+           return node;
+         },
+         _insert: function _insert(item, level, isNode) {
+           var toBBox = this.toBBox,
+               bbox = isNode ? item : toBBox(item),
+               insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
 
+           var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-             var rconpointer = 0;
-             var t = KC,
-                 tt;
 
-             while (t < roundKeyCount) {
-               tt = tk[KC - 1];
-               tk[0] ^= S[tt >> 16 & 0xFF] << 24 ^ S[tt >> 8 & 0xFF] << 16 ^ S[tt & 0xFF] << 8 ^ S[tt >> 24 & 0xFF] ^ rcon[rconpointer] << 24;
-               rconpointer += 1; // key expansion (for non-256 bit)
+           node.children.push(item);
+           extend$2(node, bbox); // split on node overflow; propagate upwards if necessary
 
-               if (KC != 8) {
-                 for (var i = 1; i < KC; i++) {
-                   tk[i] ^= tk[i - 1];
-                 } // key expansion for 256-bit keys is "slightly different" (fips-197)
+           while (level >= 0) {
+             if (insertPath[level].children.length > this._maxEntries) {
+               this._split(insertPath, level);
 
-               } else {
-                 for (var i = 1; i < KC / 2; i++) {
-                   tk[i] ^= tk[i - 1];
-                 }
+               level--;
+             } else break;
+           } // adjust bboxes along the insertion path
 
-                 tt = tk[KC / 2 - 1];
-                 tk[KC / 2] ^= S[tt & 0xFF] ^ S[tt >> 8 & 0xFF] << 8 ^ S[tt >> 16 & 0xFF] << 16 ^ S[tt >> 24 & 0xFF] << 24;
 
-                 for (var i = KC / 2 + 1; i < KC; i++) {
-                   tk[i] ^= tk[i - 1];
-                 }
-               } // copy values into round key arrays
+           this._adjustParentBBoxes(bbox, insertPath, level);
+         },
+         // split overflowed node into two
+         _split: function _split(insertPath, level) {
+           var node = insertPath[level],
+               M = node.children.length,
+               m = this._minEntries;
 
+           this._chooseSplitAxis(node, m, M);
 
-               var i = 0,
-                   r,
-                   c;
+           var splitIndex = this._chooseSplitIndex(node, m, M);
 
-               while (i < KC && t < roundKeyCount) {
-                 r = t >> 2;
-                 c = t % 4;
-                 this._Ke[r][c] = tk[i];
-                 this._Kd[rounds - r][c] = tk[i++];
-                 t++;
-               }
-             } // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
+           var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
+           newNode.height = node.height;
+           newNode.leaf = node.leaf;
+           calcBBox$1(node, this.toBBox);
+           calcBBox$1(newNode, this.toBBox);
+           if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
+         },
+         _splitRoot: function _splitRoot(node, newNode) {
+           // split root node
+           this.data = createNode$1([node, newNode]);
+           this.data.height = node.height + 1;
+           this.data.leaf = false;
+           calcBBox$1(this.data, this.toBBox);
+         },
+         _chooseSplitIndex: function _chooseSplitIndex(node, m, M) {
+           var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
+           minOverlap = minArea = Infinity;
 
+           for (i = m; i <= M - m; i++) {
+             bbox1 = distBBox$1(node, 0, i, this.toBBox);
+             bbox2 = distBBox$1(node, i, M, this.toBBox);
+             overlap = intersectionArea$1(bbox1, bbox2);
+             area = bboxArea$1(bbox1) + bboxArea$1(bbox2); // choose distribution with minimum overlap
 
-             for (var r = 1; r < rounds; r++) {
-               for (var c = 0; c < 4; c++) {
-                 tt = this._Kd[r][c];
-                 this._Kd[r][c] = U1[tt >> 24 & 0xFF] ^ U2[tt >> 16 & 0xFF] ^ U3[tt >> 8 & 0xFF] ^ U4[tt & 0xFF];
+             if (overlap < minOverlap) {
+               minOverlap = overlap;
+               index = i;
+               minArea = area < minArea ? area : minArea;
+             } else if (overlap === minOverlap) {
+               // otherwise choose distribution with minimum area
+               if (area < minArea) {
+                 minArea = area;
+                 index = i;
                }
              }
-           };
+           }
 
-           AES.prototype.encrypt = function (plaintext) {
-             if (plaintext.length != 16) {
-               throw new Error('invalid plaintext size (must be 16 bytes)');
-             }
+           return index;
+         },
+         // sorts node children by the best axis for split
+         _chooseSplitAxis: function _chooseSplitAxis(node, m, M) {
+           var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
+               compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
+               xMargin = this._allDistMargin(node, m, M, compareMinX),
+               yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
+           // otherwise it's already sorted by minY
 
-             var rounds = this._Ke.length - 1;
-             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
 
-             var t = convertToInt32(plaintext);
+           if (xMargin < yMargin) node.children.sort(compareMinX);
+         },
+         // total margin of all possible split distributions where each node is at least m full
+         _allDistMargin: function _allDistMargin(node, m, M, compare) {
+           node.children.sort(compare);
+           var toBBox = this.toBBox,
+               leftBBox = distBBox$1(node, 0, m, toBBox),
+               rightBBox = distBBox$1(node, M - m, M, toBBox),
+               margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
+               i,
+               child;
 
-             for (var i = 0; i < 4; i++) {
-               t[i] ^= this._Ke[0][i];
-             } // apply round transforms
+           for (i = m; i < M - m; i++) {
+             child = node.children[i];
+             extend$2(leftBBox, node.leaf ? toBBox(child) : child);
+             margin += bboxMargin$1(leftBBox);
+           }
+
+           for (i = M - m - 1; i >= m; i--) {
+             child = node.children[i];
+             extend$2(rightBBox, node.leaf ? toBBox(child) : child);
+             margin += bboxMargin$1(rightBBox);
+           }
 
+           return margin;
+         },
+         _adjustParentBBoxes: function _adjustParentBBoxes(bbox, path, level) {
+           // adjust bboxes along the given tree path
+           for (var i = level; i >= 0; i--) {
+             extend$2(path[i], bbox);
+           }
+         },
+         _condense: function _condense(path) {
+           // go through the path, removing empty nodes and updating bboxes
+           for (var i = path.length - 1, siblings; i >= 0; i--) {
+             if (path[i].children.length === 0) {
+               if (i > 0) {
+                 siblings = path[i - 1].children;
+                 siblings.splice(siblings.indexOf(path[i]), 1);
+               } else this.clear();
+             } else calcBBox$1(path[i], this.toBBox);
+           }
+         },
+         _initFormat: function _initFormat(format) {
+           // data format (minX, minY, maxX, maxY accessors)
+           // uses eval-type function compilation instead of just accepting a toBBox function
+           // because the algorithms are very sensitive to sorting functions performance,
+           // so they should be dead simple and without inner calls
+           var compareArr = ['return a', ' - b', ';'];
+           this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
+           this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
+           this.toBBox = new Function('a', 'return {minX: a' + format[0] + ', minY: a' + format[1] + ', maxX: a' + format[2] + ', maxY: a' + format[3] + '};');
+         }
+       };
 
-             for (var r = 1; r < rounds; r++) {
-               for (var i = 0; i < 4; i++) {
-                 a[i] = T1[t[i] >> 24 & 0xff] ^ T2[t[(i + 1) % 4] >> 16 & 0xff] ^ T3[t[(i + 2) % 4] >> 8 & 0xff] ^ T4[t[(i + 3) % 4] & 0xff] ^ this._Ke[r][i];
-               }
+       function findItem$1(item, items, equalsFn) {
+         if (!equalsFn) return items.indexOf(item);
 
-               t = a.slice();
-             } // the last round is special
+         for (var i = 0; i < items.length; i++) {
+           if (equalsFn(item, items[i])) return i;
+         }
 
+         return -1;
+       } // calculate node's bbox from bboxes of its children
 
-             var result = createArray(16),
-                 tt;
 
-             for (var i = 0; i < 4; i++) {
-               tt = this._Ke[rounds][i];
-               result[4 * i] = (S[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
-               result[4 * i + 1] = (S[t[(i + 1) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
-               result[4 * i + 2] = (S[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
-               result[4 * i + 3] = (S[t[(i + 3) % 4] & 0xff] ^ tt) & 0xff;
-             }
+       function calcBBox$1(node, toBBox) {
+         distBBox$1(node, 0, node.children.length, toBBox, node);
+       } // min bounding rectangle of node children from k to p-1
 
-             return result;
-           };
 
-           AES.prototype.decrypt = function (ciphertext) {
-             if (ciphertext.length != 16) {
-               throw new Error('invalid ciphertext size (must be 16 bytes)');
-             }
+       function distBBox$1(node, k, p, toBBox, destNode) {
+         if (!destNode) destNode = createNode$1(null);
+         destNode.minX = Infinity;
+         destNode.minY = Infinity;
+         destNode.maxX = -Infinity;
+         destNode.maxY = -Infinity;
 
-             var rounds = this._Kd.length - 1;
-             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
+         for (var i = k, child; i < p; i++) {
+           child = node.children[i];
+           extend$2(destNode, node.leaf ? toBBox(child) : child);
+         }
 
-             var t = convertToInt32(ciphertext);
+         return destNode;
+       }
 
-             for (var i = 0; i < 4; i++) {
-               t[i] ^= this._Kd[0][i];
-             } // apply round transforms
+       function extend$2(a, b) {
+         a.minX = Math.min(a.minX, b.minX);
+         a.minY = Math.min(a.minY, b.minY);
+         a.maxX = Math.max(a.maxX, b.maxX);
+         a.maxY = Math.max(a.maxY, b.maxY);
+         return a;
+       }
 
+       function compareNodeMinX$1(a, b) {
+         return a.minX - b.minX;
+       }
 
-             for (var r = 1; r < rounds; r++) {
-               for (var i = 0; i < 4; i++) {
-                 a[i] = T5[t[i] >> 24 & 0xff] ^ T6[t[(i + 3) % 4] >> 16 & 0xff] ^ T7[t[(i + 2) % 4] >> 8 & 0xff] ^ T8[t[(i + 1) % 4] & 0xff] ^ this._Kd[r][i];
-               }
+       function compareNodeMinY$1(a, b) {
+         return a.minY - b.minY;
+       }
 
-               t = a.slice();
-             } // the last round is special
+       function bboxArea$1(a) {
+         return (a.maxX - a.minX) * (a.maxY - a.minY);
+       }
 
+       function bboxMargin$1(a) {
+         return a.maxX - a.minX + (a.maxY - a.minY);
+       }
 
-             var result = createArray(16),
-                 tt;
+       function enlargedArea$1(a, b) {
+         return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+       }
 
-             for (var i = 0; i < 4; i++) {
-               tt = this._Kd[rounds][i];
-               result[4 * i] = (Si[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
-               result[4 * i + 1] = (Si[t[(i + 3) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
-               result[4 * i + 2] = (Si[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
-               result[4 * i + 3] = (Si[t[(i + 1) % 4] & 0xff] ^ tt) & 0xff;
-             }
+       function intersectionArea$1(a, b) {
+         var minX = Math.max(a.minX, b.minX),
+             minY = Math.max(a.minY, b.minY),
+             maxX = Math.min(a.maxX, b.maxX),
+             maxY = Math.min(a.maxY, b.maxY);
+         return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
+       }
 
-             return result;
-           };
-           /**
-            *  Mode Of Operation - Electonic Codebook (ECB)
-            */
+       function contains$1(a, b) {
+         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+       }
 
+       function intersects$1(a, b) {
+         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+       }
 
-           var ModeOfOperationECB = function ModeOfOperationECB(key) {
-             if (!(this instanceof ModeOfOperationECB)) {
-               throw Error('AES must be instanitated with `new`');
-             }
+       function createNode$1(children) {
+         return {
+           children: children,
+           height: 1,
+           leaf: true,
+           minX: Infinity,
+           minY: Infinity,
+           maxX: -Infinity,
+           maxY: -Infinity
+         };
+       } // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+       // combines selection algorithm with binary divide & conquer approach
 
-             this.description = "Electronic Code Block";
-             this.name = "ecb";
-             this._aes = new AES(key);
-           };
 
-           ModeOfOperationECB.prototype.encrypt = function (plaintext) {
-             plaintext = coerceArray(plaintext);
+       function multiSelect$1(arr, left, right, n, compare) {
+         var stack = [left, right],
+             mid;
 
-             if (plaintext.length % 16 !== 0) {
-               throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-             }
+         while (stack.length) {
+           right = stack.pop();
+           left = stack.pop();
+           if (right - left <= n) continue;
+           mid = left + Math.ceil((right - left) / n / 2) * n;
+           quickselect$1(arr, mid, left, right, compare);
+           stack.push(left, mid, mid, right);
+         }
+       }
 
-             var ciphertext = createArray(plaintext.length);
-             var block = createArray(16);
+       var lineclip_1 = lineclip$2;
+       lineclip$2.polyline = lineclip$2;
+       lineclip$2.polygon = polygonclip$1; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
+       // handle polylines rather than just segments
 
-             for (var i = 0; i < plaintext.length; i += 16) {
-               copyArray(plaintext, block, 0, i, i + 16);
-               block = this._aes.encrypt(block);
-               copyArray(block, ciphertext, i);
-             }
+       function lineclip$2(points, bbox, result) {
+         var len = points.length,
+             codeA = bitCode$1(points[0], bbox),
+             part = [],
+             i,
+             a,
+             b,
+             codeB,
+             lastCode;
+         if (!result) result = [];
 
-             return ciphertext;
-           };
+         for (i = 1; i < len; i++) {
+           a = points[i - 1];
+           b = points[i];
+           codeB = lastCode = bitCode$1(b, bbox);
 
-           ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
-             ciphertext = coerceArray(ciphertext);
+           while (true) {
+             if (!(codeA | codeB)) {
+               // accept
+               part.push(a);
 
-             if (ciphertext.length % 16 !== 0) {
-               throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-             }
+               if (codeB !== lastCode) {
+                 // segment went outside
+                 part.push(b);
 
-             var plaintext = createArray(ciphertext.length);
-             var block = createArray(16);
+                 if (i < len - 1) {
+                   // start a new line
+                   result.push(part);
+                   part = [];
+                 }
+               } else if (i === len - 1) {
+                 part.push(b);
+               }
 
-             for (var i = 0; i < ciphertext.length; i += 16) {
-               copyArray(ciphertext, block, 0, i, i + 16);
-               block = this._aes.decrypt(block);
-               copyArray(block, plaintext, i);
+               break;
+             } else if (codeA & codeB) {
+               // trivial reject
+               break;
+             } else if (codeA) {
+               // a outside, intersect with clip edge
+               a = intersect$1(a, b, codeA, bbox);
+               codeA = bitCode$1(a, bbox);
+             } else {
+               // b outside
+               b = intersect$1(a, b, codeB, bbox);
+               codeB = bitCode$1(b, bbox);
              }
+           }
 
-             return plaintext;
-           };
-           /**
-            *  Mode Of Operation - Cipher Block Chaining (CBC)
-            */
+           codeA = lastCode;
+         }
 
+         if (part.length) result.push(part);
+         return result;
+       } // Sutherland-Hodgeman polygon clipping algorithm
 
-           var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
-             if (!(this instanceof ModeOfOperationCBC)) {
-               throw Error('AES must be instanitated with `new`');
-             }
 
-             this.description = "Cipher Block Chaining";
-             this.name = "cbc";
+       function polygonclip$1(points, bbox) {
+         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-             if (!iv) {
-               iv = createArray(16);
-             } else if (iv.length != 16) {
-               throw new Error('invalid initialation vector size (must be 16 bytes)');
-             }
-
-             this._lastCipherblock = coerceArray(iv, true);
-             this._aes = new AES(key);
-           };
-
-           ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
-             plaintext = coerceArray(plaintext);
-
-             if (plaintext.length % 16 !== 0) {
-               throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
-             }
-
-             var ciphertext = createArray(plaintext.length);
-             var block = createArray(16);
-
-             for (var i = 0; i < plaintext.length; i += 16) {
-               copyArray(plaintext, block, 0, i, i + 16);
-
-               for (var j = 0; j < 16; j++) {
-                 block[j] ^= this._lastCipherblock[j];
-               }
-
-               this._lastCipherblock = this._aes.encrypt(block);
-               copyArray(this._lastCipherblock, ciphertext, i);
-             }
-
-             return ciphertext;
-           };
-
-           ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
-             ciphertext = coerceArray(ciphertext);
-
-             if (ciphertext.length % 16 !== 0) {
-               throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
-             }
-
-             var plaintext = createArray(ciphertext.length);
-             var block = createArray(16);
-
-             for (var i = 0; i < ciphertext.length; i += 16) {
-               copyArray(ciphertext, block, 0, i, i + 16);
-               block = this._aes.decrypt(block);
-
-               for (var j = 0; j < 16; j++) {
-                 plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
-               }
-
-               copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
-             }
-
-             return plaintext;
-           };
-           /**
-            *  Mode Of Operation - Cipher Feedback (CFB)
-            */
-
-
-           var ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
-             if (!(this instanceof ModeOfOperationCFB)) {
-               throw Error('AES must be instanitated with `new`');
-             }
-
-             this.description = "Cipher Feedback";
-             this.name = "cfb";
-
-             if (!iv) {
-               iv = createArray(16);
-             } else if (iv.length != 16) {
-               throw new Error('invalid initialation vector size (must be 16 size)');
-             }
-
-             if (!segmentSize) {
-               segmentSize = 1;
-             }
-
-             this.segmentSize = segmentSize;
-             this._shiftRegister = coerceArray(iv, true);
-             this._aes = new AES(key);
-           };
-
-           ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
-             if (plaintext.length % this.segmentSize != 0) {
-               throw new Error('invalid plaintext size (must be segmentSize bytes)');
-             }
-
-             var encrypted = coerceArray(plaintext, true);
-             var xorSegment;
-
-             for (var i = 0; i < encrypted.length; i += this.segmentSize) {
-               xorSegment = this._aes.encrypt(this._shiftRegister);
-
-               for (var j = 0; j < this.segmentSize; j++) {
-                 encrypted[i + j] ^= xorSegment[j];
-               } // Shift the register
-
-
-               copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-               copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-             }
-
-             return encrypted;
-           };
-
-           ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
-             if (ciphertext.length % this.segmentSize != 0) {
-               throw new Error('invalid ciphertext size (must be segmentSize bytes)');
-             }
-
-             var plaintext = coerceArray(ciphertext, true);
-             var xorSegment;
-
-             for (var i = 0; i < plaintext.length; i += this.segmentSize) {
-               xorSegment = this._aes.encrypt(this._shiftRegister);
-
-               for (var j = 0; j < this.segmentSize; j++) {
-                 plaintext[i + j] ^= xorSegment[j];
-               } // Shift the register
-
-
-               copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
-               copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
-             }
-
-             return plaintext;
-           };
-           /**
-            *  Mode Of Operation - Output Feedback (OFB)
-            */
-
-
-           var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
-             if (!(this instanceof ModeOfOperationOFB)) {
-               throw Error('AES must be instanitated with `new`');
-             }
-
-             this.description = "Output Feedback";
-             this.name = "ofb";
-
-             if (!iv) {
-               iv = createArray(16);
-             } else if (iv.length != 16) {
-               throw new Error('invalid initialation vector size (must be 16 bytes)');
-             }
-
-             this._lastPrecipher = coerceArray(iv, true);
-             this._lastPrecipherIndex = 16;
-             this._aes = new AES(key);
-           };
-
-           ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
-             var encrypted = coerceArray(plaintext, true);
-
-             for (var i = 0; i < encrypted.length; i++) {
-               if (this._lastPrecipherIndex === 16) {
-                 this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
-                 this._lastPrecipherIndex = 0;
-               }
-
-               encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
-             }
-
-             return encrypted;
-           }; // Decryption is symetric
-
-
-           ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
-           /**
-            *  Counter object for CTR common mode of operation
-            */
-
-           var Counter = function Counter(initialValue) {
-             if (!(this instanceof Counter)) {
-               throw Error('Counter must be instanitated with `new`');
-             } // We allow 0, but anything false-ish uses the default 1
-
-
-             if (initialValue !== 0 && !initialValue) {
-               initialValue = 1;
-             }
-
-             if (typeof initialValue === 'number') {
-               this._counter = createArray(16);
-               this.setValue(initialValue);
-             } else {
-               this.setBytes(initialValue);
-             }
-           };
-
-           Counter.prototype.setValue = function (value) {
-             if (typeof value !== 'number' || parseInt(value) != value) {
-               throw new Error('invalid counter value (must be an integer)');
-             } // We cannot safely handle numbers beyond the safe range for integers
-
-
-             if (value > Number.MAX_SAFE_INTEGER) {
-               throw new Error('integer value out of safe range');
-             }
-
-             for (var index = 15; index >= 0; --index) {
-               this._counter[index] = value % 256;
-               value = parseInt(value / 256);
-             }
-           };
-
-           Counter.prototype.setBytes = function (bytes) {
-             bytes = coerceArray(bytes, true);
-
-             if (bytes.length != 16) {
-               throw new Error('invalid counter bytes size (must be 16 bytes)');
-             }
-
-             this._counter = bytes;
-           };
+         for (edge = 1; edge <= 8; edge *= 2) {
+           result = [];
+           prev = points[points.length - 1];
+           prevInside = !(bitCode$1(prev, bbox) & edge);
 
-           Counter.prototype.increment = function () {
-             for (var i = 15; i >= 0; i--) {
-               if (this._counter[i] === 255) {
-                 this._counter[i] = 0;
-               } else {
-                 this._counter[i]++;
-                 break;
-               }
-             }
-           };
-           /**
-            *  Mode Of Operation - Counter (CTR)
-            */
+           for (i = 0; i < points.length; i++) {
+             p = points[i];
+             inside = !(bitCode$1(p, bbox) & edge); // if segment goes through the clip window, add an intersection
 
+             if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
+             if (inside) result.push(p); // add a point if it's inside
 
-           var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
-             if (!(this instanceof ModeOfOperationCTR)) {
-               throw Error('AES must be instanitated with `new`');
-             }
+             prev = p;
+             prevInside = inside;
+           }
 
-             this.description = "Counter";
-             this.name = "ctr";
+           points = result;
+           if (!points.length) break;
+         }
 
-             if (!(counter instanceof Counter)) {
-               counter = new Counter(counter);
-             }
+         return result;
+       } // intersect a segment against one of the 4 lines that make up the bbox
 
-             this._counter = counter;
-             this._remainingCounter = null;
-             this._remainingCounterIndex = 16;
-             this._aes = new AES(key);
-           };
 
-           ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
-             var encrypted = coerceArray(plaintext, true);
+       function intersect$1(a, b, edge, bbox) {
+         return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
+         edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
+         edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
+         edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
+         null;
+       } // bit code reflects the point position relative to the bbox:
+       //         left  mid  right
+       //    top  1001  1000  1010
+       //    mid  0001  0000  0010
+       // bottom  0101  0100  0110
 
-             for (var i = 0; i < encrypted.length; i++) {
-               if (this._remainingCounterIndex === 16) {
-                 this._remainingCounter = this._aes.encrypt(this._counter._counter);
-                 this._remainingCounterIndex = 0;
 
-                 this._counter.increment();
-               }
+       function bitCode$1(p, bbox) {
+         var code = 0;
+         if (p[0] < bbox[0]) code |= 1; // left
+         else if (p[0] > bbox[2]) code |= 2; // right
 
-               encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
-             }
+         if (p[1] < bbox[1]) code |= 4; // bottom
+         else if (p[1] > bbox[3]) code |= 8; // top
 
-             return encrypted;
-           }; // Decryption is symetric
+         return code;
+       }
 
+       var rbush = rbush$2.exports;
+       var lineclip$1 = lineclip_1;
+       var whichPolygon_1 = whichPolygon;
 
-           ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
-           // Padding
-           // See:https://tools.ietf.org/html/rfc2315
+       function whichPolygon(data) {
+         var bboxes = [];
 
-           function pkcs7pad(data) {
-             data = coerceArray(data, true);
-             var padder = 16 - data.length % 16;
-             var result = createArray(data.length + padder);
-             copyArray(data, result);
+         for (var i = 0; i < data.features.length; i++) {
+           var feature = data.features[i];
+           var coords = feature.geometry.coordinates;
 
-             for (var i = data.length; i < result.length; i++) {
-               result[i] = padder;
+           if (feature.geometry.type === 'Polygon') {
+             bboxes.push(treeItem(coords, feature.properties));
+           } else if (feature.geometry.type === 'MultiPolygon') {
+             for (var j = 0; j < coords.length; j++) {
+               bboxes.push(treeItem(coords[j], feature.properties));
              }
-
-             return result;
            }
+         }
 
-           function pkcs7strip(data) {
-             data = coerceArray(data, true);
-
-             if (data.length < 16) {
-               throw new Error('PKCS#7 invalid length');
-             }
+         var tree = rbush().load(bboxes);
 
-             var padder = data[data.length - 1];
+         function query(p, multi) {
+           var output = [],
+               result = tree.search({
+             minX: p[0],
+             minY: p[1],
+             maxX: p[0],
+             maxY: p[1]
+           });
 
-             if (padder > 16) {
-               throw new Error('PKCS#7 padding byte out of range');
+           for (var i = 0; i < result.length; i++) {
+             if (insidePolygon(result[i].coords, p)) {
+               if (multi) output.push(result[i].props);else return result[i].props;
              }
+           }
 
-             var length = data.length - padder;
-
-             for (var i = 0; i < padder; i++) {
-               if (data[length + i] !== padder) {
-                 throw new Error('PKCS#7 invalid padding byte');
-               }
-             }
+           return multi && output.length ? output : null;
+         }
 
-             var result = createArray(length);
-             copyArray(data, result, 0, 0, length);
-             return result;
-           } ///////////////////////
-           // Exporting
-           // The block cipher
+         query.tree = tree;
 
+         query.bbox = function queryBBox(bbox) {
+           var output = [];
+           var result = tree.search({
+             minX: bbox[0],
+             minY: bbox[1],
+             maxX: bbox[2],
+             maxY: bbox[3]
+           });
 
-           var aesjs = {
-             AES: AES,
-             Counter: Counter,
-             ModeOfOperation: {
-               ecb: ModeOfOperationECB,
-               cbc: ModeOfOperationCBC,
-               cfb: ModeOfOperationCFB,
-               ofb: ModeOfOperationOFB,
-               ctr: ModeOfOperationCTR
-             },
-             utils: {
-               hex: convertHex,
-               utf8: convertUtf8
-             },
-             padding: {
-               pkcs7: {
-                 pad: pkcs7pad,
-                 strip: pkcs7strip
-               }
-             },
-             _arrayTest: {
-               coerceArray: coerceArray,
-               createArray: createArray,
-               copyArray: copyArray
+           for (var i = 0; i < result.length; i++) {
+             if (polygonIntersectsBBox(result[i].coords, bbox)) {
+               output.push(result[i].props);
              }
-           }; // node.js
-
-           {
-             module.exports = aesjs; // RequireJS/AMD
-             // http://www.requirejs.org/docs/api.html
-             // https://github.com/amdjs/amdjs-api/wiki/AMD
            }
-         })();
-       });
 
-       // We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
-       // To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
-       // This default signing key is built into iD and can be used to mask/unmask sensitive values.
+           return output;
+         };
 
-       var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
-       function utilAesEncrypt(text, key) {
-         key = key || DEFAULT_128;
-         var textBytes = aesJs.utils.utf8.toBytes(text);
-         var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-         var encryptedBytes = aesCtr.encrypt(textBytes);
-         var encryptedHex = aesJs.utils.hex.fromBytes(encryptedBytes);
-         return encryptedHex;
-       }
-       function utilAesDecrypt(encryptedHex, key) {
-         key = key || DEFAULT_128;
-         var encryptedBytes = aesJs.utils.hex.toBytes(encryptedHex);
-         var aesCtr = new aesJs.ModeOfOperation.ctr(key);
-         var decryptedBytes = aesCtr.decrypt(encryptedBytes);
-         var text = aesJs.utils.utf8.fromBytes(decryptedBytes);
-         return text;
+         return query;
        }
 
-       function utilCleanTags(tags) {
-         var out = {};
-
-         for (var k in tags) {
-           if (!k) continue;
-           var v = tags[k];
+       function polygonIntersectsBBox(polygon, bbox) {
+         var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
+         if (insidePolygon(polygon, bboxCenter)) return true;
 
-           if (v !== undefined) {
-             out[k] = cleanValue(k, v);
-           }
+         for (var i = 0; i < polygon.length; i++) {
+           if (lineclip$1(polygon[i], bbox).length > 0) return true;
          }
 
-         return out;
+         return false;
+       } // ray casting algorithm for detecting if point is in polygon
 
-         function cleanValue(k, v) {
-           function keepSpaces(k) {
-             return /_hours|_times|:conditional$/.test(k);
-           }
 
-           function skip(k) {
-             return /^(description|note|fixme)$/.test(k);
-           }
+       function insidePolygon(rings, p) {
+         var inside = false;
 
-           if (skip(k)) return v;
-           var cleaned = v.split(';').map(function (s) {
-             return s.trim();
-           }).join(keepSpaces(k) ? '; ' : ';'); // The code below is not intended to validate websites and emails.
-           // It is only intended to prevent obvious copy-paste errors. (#2323)
-           // clean website- and email-like tags
+         for (var i = 0, len = rings.length; i < len; i++) {
+           var ring = rings[i];
 
-           if (k.indexOf('website') !== -1 || k.indexOf('email') !== -1 || cleaned.indexOf('http') === 0) {
-             cleaned = cleaned.replace(/[\u200B-\u200F\uFEFF]/g, ''); // strip LRM and other zero width chars
+           for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
+             if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
            }
-
-           return cleaned;
          }
-       }
-
-       // Like selection.property('value', ...), but avoids no-op value sets,
-       // which can result in layout/repaint thrashing in some situations.
-       function utilGetSetValue(selection, value) {
-         function d3_selection_value(value) {
-           function valueNull() {
-             delete this.value;
-           }
-
-           function valueConstant() {
-             if (this.value !== value) {
-               this.value = value;
-             }
-           }
 
-           function valueFunction() {
-             var x = value.apply(this, arguments);
+         return inside;
+       }
 
-             if (x === null || x === undefined) {
-               delete this.value;
-             } else if (this.value !== x) {
-               this.value = x;
-             }
-           }
+       function rayIntersect(p, p1, p2) {
+         return p1[1] > p[1] !== p2[1] > p[1] && p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0];
+       }
 
-           return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
-         }
+       function treeItem(coords, props) {
+         var item = {
+           minX: Infinity,
+           minY: Infinity,
+           maxX: -Infinity,
+           maxY: -Infinity,
+           coords: coords,
+           props: props
+         };
 
-         if (arguments.length === 1) {
-           return selection.property('value');
+         for (var i = 0; i < coords[0].length; i++) {
+           var p = coords[0][i];
+           item.minX = Math.min(item.minX, p[0]);
+           item.minY = Math.min(item.minY, p[1]);
+           item.maxX = Math.max(item.maxX, p[0]);
+           item.maxY = Math.max(item.maxY, p[1]);
          }
 
-         return selection.each(d3_selection_value(value));
+         return item;
        }
 
-       function utilKeybinding(namespace) {
-         var _keybindings = {};
-
-         function testBindings(d3_event, isCapturing) {
-           var didMatch = false;
-           var bindings = Object.keys(_keybindings).map(function (id) {
-             return _keybindings[id];
-           });
-           var i, binding; // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
-           // so we don't strictly match on the shift key, but we prioritize
-           // shifted keybindings first, and fallback to unshifted only if no match.
-           // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
-           // priority match shifted keybindings first
-
-           for (i = 0; i < bindings.length; i++) {
+       var type = "FeatureCollection";
+       var features = [{
+         type: "Feature",
+         properties: {
+           wikidata: "Q21",
+           nameEn: "England",
+           aliases: ["GB-ENG"],
+           country: "GB",
+           groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["44"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-6.03913, 51.13217], [-7.74976, 48.64773], [1.17405, 50.74239], [2.18458, 51.52087], [2.56575, 51.85301], [0.792, 57.56437], [-2.30613, 55.62698], [-2.17058, 55.45916], [-2.6095, 55.28488], [-2.63532, 55.19452], [-3.02906, 55.04606], [-3.09361, 54.94924], [-3.38407, 54.94278], [-4.1819, 54.57861], [-3.5082, 53.54318], [-3.08228, 53.25526], [-3.03675, 53.25092], [-2.92329, 53.19383], [-2.92022, 53.17685], [-2.98598, 53.15589], [-2.90649, 53.10964], [-2.87469, 53.12337], [-2.89131, 53.09374], [-2.83133, 52.99184], [-2.7251, 52.98389], [-2.72221, 52.92969], [-2.80549, 52.89428], [-2.85897, 52.94487], [-2.92401, 52.93836], [-2.97243, 52.9651], [-3.13576, 52.895], [-3.15744, 52.84947], [-3.16105, 52.79599], [-3.08734, 52.77504], [-3.01001, 52.76636], [-2.95581, 52.71794], [-3.01724, 52.72083], [-3.04398, 52.65435], [-3.13648, 52.58208], [-3.12926, 52.5286], [-3.09746, 52.53077], [-3.08662, 52.54811], [-3.00929, 52.57774], [-2.99701, 52.551], [-3.03603, 52.49969], [-3.13359, 52.49174], [-3.22971, 52.45344], [-3.22754, 52.42526], [-3.04687, 52.34504], [-2.95364, 52.3501], [-2.99701, 52.323], [-3.00785, 52.2753], [-3.09289, 52.20546], [-3.12638, 52.08114], [-2.97111, 51.90456], [-2.8818, 51.93196], [-2.78742, 51.88833], [-2.74277, 51.84367], [-2.66234, 51.83555], [-2.66336, 51.59504], [-3.20563, 51.31615], [-6.03913, 51.13217]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q22",
+           nameEn: "Scotland",
+           aliases: ["GB-SCT"],
+           country: "GB",
+           groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["44"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[0.792, 57.56437], [-0.3751, 61.32236], [-14.78497, 57.60709], [-6.82333, 55.83103], [-4.69044, 54.3629], [-3.38407, 54.94278], [-3.09361, 54.94924], [-3.02906, 55.04606], [-2.63532, 55.19452], [-2.6095, 55.28488], [-2.17058, 55.45916], [-2.30613, 55.62698], [0.792, 57.56437]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q25",
+           nameEn: "Wales",
+           aliases: ["GB-WLS"],
+           country: "GB",
+           groups: ["Q23666", "Q3336843", "154", "150", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["44"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-3.5082, 53.54318], [-5.37267, 53.63269], [-6.03913, 51.13217], [-3.20563, 51.31615], [-2.66336, 51.59504], [-2.66234, 51.83555], [-2.74277, 51.84367], [-2.78742, 51.88833], [-2.8818, 51.93196], [-2.97111, 51.90456], [-3.12638, 52.08114], [-3.09289, 52.20546], [-3.00785, 52.2753], [-2.99701, 52.323], [-2.95364, 52.3501], [-3.04687, 52.34504], [-3.22754, 52.42526], [-3.22971, 52.45344], [-3.13359, 52.49174], [-3.03603, 52.49969], [-2.99701, 52.551], [-3.00929, 52.57774], [-3.08662, 52.54811], [-3.09746, 52.53077], [-3.12926, 52.5286], [-3.13648, 52.58208], [-3.04398, 52.65435], [-3.01724, 52.72083], [-2.95581, 52.71794], [-3.01001, 52.76636], [-3.08734, 52.77504], [-3.16105, 52.79599], [-3.15744, 52.84947], [-3.13576, 52.895], [-2.97243, 52.9651], [-2.92401, 52.93836], [-2.85897, 52.94487], [-2.80549, 52.89428], [-2.72221, 52.92969], [-2.7251, 52.98389], [-2.83133, 52.99184], [-2.89131, 53.09374], [-2.87469, 53.12337], [-2.90649, 53.10964], [-2.98598, 53.15589], [-2.92022, 53.17685], [-2.92329, 53.19383], [-3.03675, 53.25092], [-3.08228, 53.25526], [-3.5082, 53.54318]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q26",
+           nameEn: "Northern Ireland",
+           aliases: ["GB-NIR"],
+           country: "GB",
+           groups: ["Q22890", "Q3336843", "154", "150", "UN"],
+           driveSide: "left",
+           roadSpeedUnit: "mph",
+           roadHeightUnit: "ft",
+           callingCodes: ["44"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[-6.34755, 55.49206], [-7.2471, 55.06933], [-7.34464, 55.04688], [-7.4033, 55.00391], [-7.40004, 54.94498], [-7.44404, 54.9403], [-7.4473, 54.87003], [-7.47626, 54.83084], [-7.54508, 54.79401], [-7.54671, 54.74606], [-7.64449, 54.75265], [-7.75041, 54.7103], [-7.83352, 54.73854], [-7.93293, 54.66603], [-7.70315, 54.62077], [-7.8596, 54.53671], [-7.99812, 54.54427], [-8.04538, 54.48941], [-8.179, 54.46763], [-8.04555, 54.36292], [-7.87101, 54.29299], [-7.8596, 54.21779], [-7.81397, 54.20159], [-7.69501, 54.20731], [-7.55812, 54.12239], [-7.4799, 54.12239], [-7.44567, 54.1539], [-7.32834, 54.11475], [-7.30553, 54.11869], [-7.34005, 54.14698], [-7.29157, 54.17191], [-7.28017, 54.16714], [-7.29687, 54.1354], [-7.29493, 54.12013], [-7.26316, 54.13863], [-7.25012, 54.20063], [-7.14908, 54.22732], [-7.19145, 54.31296], [-7.02034, 54.4212], [-6.87775, 54.34682], [-6.85179, 54.29176], [-6.81583, 54.22791], [-6.74575, 54.18788], [-6.70175, 54.20218], [-6.6382, 54.17071], [-6.66264, 54.0666], [-6.62842, 54.03503], [-6.47849, 54.06947], [-6.36605, 54.07234], [-6.36279, 54.11248], [-6.32694, 54.09337], [-6.29003, 54.11278], [-6.26218, 54.09785], [-5.83481, 53.87749], [-4.69044, 54.3629], [-6.34755, 55.49206]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q35",
+           nameEn: "Denmark",
+           country: "DK",
+           groups: ["EU", "154", "150", "UN"],
+           callingCodes: ["45"]
+         },
+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[12.16597, 56.60205], [10.40861, 58.38489], [7.28637, 57.35913], [8.02459, 55.09613], [8.45719, 55.06747], [8.55769, 54.91837], [8.63979, 54.91069], [8.76387, 54.8948], [8.81178, 54.90518], [8.92795, 54.90452], [9.04629, 54.87249], [9.14275, 54.87421], [9.20571, 54.85841], [9.24631, 54.84726], [9.23445, 54.83432], [9.2474, 54.8112], [9.32771, 54.80602], [9.33849, 54.80233], [9.36496, 54.81749], [9.38532, 54.83968], [9.41213, 54.84254], [9.43155, 54.82586], [9.4659, 54.83131], [9.58937, 54.88785], [9.62734, 54.88057], [9.61187, 54.85548], [9.73563, 54.8247], [9.89314, 54.84171], [10.16755, 54.73883], [10.31111, 54.65968], [11.00303, 54.63689], [11.90309, 54.38543], [12.85844, 54.82438], [13.93395, 54.84044], [15.36991, 54.73263], [15.79951, 55.54655], [14.89259, 55.5623], [14.28399, 55.1553], [12.84405, 55.13257], [12.60345, 55.42675], [12.88472, 55.63369], [12.6372, 55.91371], [12.65312, 56.04345], [12.07466, 56.29488], [12.16597, 56.60205]]]]
+         }
+       }, {
+         type: "Feature",
+         properties: {
+           wikidata: "Q55",
+           nameEn: "Netherlands",
+           country: "NL",
+           groups: ["EU", "155", "150", "UN"],
+           callingCodes: ["31"]
+         },
+         geometry: {
+           type: "MultiPolygon",
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+         geometry: {
+           type: "MultiPolygon",
+           coordinates: [[[[30.41902, -15.62269], [30.35574, -15.6513], [29.8317, -15.6126], [29.4437, -15.68702], [29.21955, -15.76589], [29.01298, -15.93805], [28.9243, -15.93987], [28.8501, -16.04537], [28.81454, -16.48611], [28.76199, -16.51575], [28.73725, -16.5528], [27.83141, -16.96274], [27.62795, -17.24365], [27.61377, -17.34378], [27.30736, -17.60487], [27.14196, -17.81398], [26.89926, -17.98756], [26.74314, -18.0199], [26.68403, -18.07411], [26.55918, -17.99638], [26.21601, -17.88608], [26.0908, -17.93021], [26.08925, -17.98168], [25.85892, -17.97726], [25.85738, -17.91403], [25.6827, -17.81987], [25.51646, -17.86232], [25.26433, -17.79571], [25.23909, -17.90832], [25.31799, -18.07091], [25.39972, -18.12691], [25.53465, -18.39041], [25.68859, -18.56165], [25.79217, -18.6355], [25.82353, -18.82808], [25.94326, -18.90362], [25.99837, -19.02943], [25.96226, -19.08152], [26.17227, -19.53709], [26.72246, -19.92707], [27.21278, -20.08244], [27.29831, -20.28935], [27.28865, -20.49873], [27.69361, -20.48531], [27.72972, -20.51735], [27.69171, -21.08409], [27.91407, -21.31621], [28.01669, -21.57624], [28.29416, -21.59037], [28.49942, -21.66634], [28.58114, -21.63455], [29.07763, -21.81877], [29.04023, -21.85864], [29.02191, -21.90647], [29.02191, -21.95665], [29.04108, -22.00563], [29.08495, -22.04867], [29.14501, -22.07275], [29.1974, -22.07472], [29.24648, -22.05967], [29.3533, -22.18363], [29.37703, -22.19581], [29.64609, -22.12917], [29.76848, -22.14128], [29.92242, -22.19408], [30.13147, -22.30841], [30.2265, -22.2961], [30.28351, -22.35587], [30.38614, -22.34533], [30.48686, -22.31368], [30.6294, -22.32599], [30.86696, -22.28907], [31.08932, -22.34884], [31.16344, -22.32599], [31.30611, -22.422], [31.38336, -22.36919], [32.41234, -21.31246], [32.48236, -21.32873], [32.37115, -21.133], [32.51644, -20.91929], [32.48122, -20.63319], [32.55167, -20.56312], [32.66174, -20.56106], [32.85987, -20.27841], [32.85987, -20.16686], [32.93032, -20.03868], [33.01178, -20.02007], [33.06461, -19.77787], [32.95013, -19.67219], [32.84666, -19.68462], [32.84446, -19.48343], [32.78282, -19.47513], [32.77966, -19.36098], [32.85107, -19.29238], [32.87088, -19.09279], [32.84006, -19.0262], [32.72118, -19.02204], [32.69917, -18.94293], [32.73439, -18.92628], [32.70137, -18.84712], [32.82465, -18.77419], [32.9017, -18.7992], [32.95013, -18.69079], [32.88629, -18.58023], [32.88629, -18.51344], [33.02278, -18.4696], [33.03159, -18.35054], [32.94133, -17.99705], [33.0492, -17.60298], [32.98536, -17.55891], [32.96554, -17.48964], [33.0426, -17.3468], [33.00517, -17.30477], [32.96554, -17.11971], [32.84113, -16.92259], [32.91051, -16.89446], [32.97655, -16.70689], [32.78943, -16.70267], [32.69917, -16.66893], [32.71017, -16.59932], [32.42838, -16.4727], [32.28529, -16.43892], [32.02772, -16.43892], [31.91324, -16.41569], [31.90223, -16.34388], [31.67988, -16.19595], [31.42451, -16.15154], [31.30563, -16.01193], [31.13171, -15.98019], [30.97761, -16.05848], [30.91597, -15.99924], [30.42568, -15.9962], [30.41902, -15.62269]]]]
+         }
+       }];
+       var borders_default = {
+         type: type,
+         features: features
+       }; // src/country-coder.ts
+
+       var borders = borders_default;
+       var whichPolygonGetter = {};
+       var featuresByCode = {};
+       var idFilterRegex = /(?=(?!^(and|the|of|el|la|de)$))(\b(and|the|of|el|la|de)\b)|[-_ .,'()&[\]/]/gi;
+
+       function canonicalID(id) {
+         var s = id || "";
+
+         if (s.charAt(0) === ".") {
+           return s.toUpperCase();
+         } else {
+           return s.replace(idFilterRegex, "").toUpperCase();
+         }
+       }
+
+       var levels = ["subterritory", "territory", "subcountryGroup", "country", "sharedLandform", "intermediateRegion", "subregion", "region", "subunion", "union", "unitedNations", "world"];
+       loadDerivedDataAndCaches(borders);
+
+       function loadDerivedDataAndCaches(borders2) {
+         var identifierProps = ["iso1A2", "iso1A3", "m49", "wikidata", "emojiFlag", "ccTLD", "nameEn"];
+         var geometryFeatures = [];
+
+         for (var i in borders2.features) {
+           var feature2 = borders2.features[i];
+           feature2.properties.id = feature2.properties.iso1A2 || feature2.properties.m49 || feature2.properties.wikidata;
+           loadM49(feature2);
+           loadTLD(feature2);
+           loadIsoStatus(feature2);
+           loadLevel(feature2);
+           loadGroups(feature2);
+           loadFlag(feature2);
+           cacheFeatureByIDs(feature2);
+           if (feature2.geometry) geometryFeatures.push(feature2);
+         }
+
+         for (var _i in borders2.features) {
+           var _feature = borders2.features[_i];
+           _feature.properties.groups = _feature.properties.groups.map(function (groupID) {
+             return featuresByCode[groupID].properties.id;
+           });
+           loadMembersForGroupsOf(_feature);
+         }
+
+         for (var _i2 in borders2.features) {
+           var _feature2 = borders2.features[_i2];
+           loadRoadSpeedUnit(_feature2);
+           loadRoadHeightUnit(_feature2);
+           loadDriveSide(_feature2);
+           loadCallingCodes(_feature2);
+           loadGroupGroups(_feature2);
+         }
+
+         for (var _i3 in borders2.features) {
+           var _feature3 = borders2.features[_i3];
+
+           _feature3.properties.groups.sort(function (groupID1, groupID2) {
+             return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
+           });
+
+           if (_feature3.properties.members) _feature3.properties.members.sort(function (id1, id2) {
+             var diff = levels.indexOf(featuresByCode[id1].properties.level) - levels.indexOf(featuresByCode[id2].properties.level);
+
+             if (diff === 0) {
+               return borders2.features.indexOf(featuresByCode[id1]) - borders2.features.indexOf(featuresByCode[id2]);
+             }
+
+             return diff;
+           });
+         }
+
+         var geometryOnlyCollection = {
+           type: "FeatureCollection",
+           features: geometryFeatures
+         };
+         whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
+
+         function loadGroups(feature2) {
+           var props = feature2.properties;
+
+           if (!props.groups) {
+             props.groups = [];
+           }
+
+           if (feature2.geometry && props.country) {
+             props.groups.push(props.country);
+           }
+
+           if (props.m49 !== "001") {
+             props.groups.push("001");
+           }
+         }
+
+         function loadM49(feature2) {
+           var props = feature2.properties;
+
+           if (!props.m49 && props.iso1N3) {
+             props.m49 = props.iso1N3;
+           }
+         }
+
+         function loadTLD(feature2) {
+           var props = feature2.properties;
+           if (props.level === "unitedNations") return;
+
+           if (!props.ccTLD && props.iso1A2) {
+             props.ccTLD = "." + props.iso1A2.toLowerCase();
+           }
+         }
+
+         function loadIsoStatus(feature2) {
+           var props = feature2.properties;
+
+           if (!props.isoStatus && props.iso1A2) {
+             props.isoStatus = "official";
+           }
+         }
+
+         function loadLevel(feature2) {
+           var props = feature2.properties;
+           if (props.level) return;
+
+           if (!props.country) {
+             props.level = "country";
+           } else if (!props.iso1A2 || props.isoStatus === "official") {
+             props.level = "territory";
+           } else {
+             props.level = "subterritory";
+           }
+         }
+
+         function loadGroupGroups(feature2) {
+           var props = feature2.properties;
+           if (feature2.geometry || !props.members) return;
+           var featureLevelIndex = levels.indexOf(props.level);
+           var sharedGroups = [];
+
+           var _loop = function _loop(_i4) {
+             var memberID = props.members[_i4];
+             var member = featuresByCode[memberID];
+             var memberGroups = member.properties.groups.filter(function (groupID) {
+               return groupID !== feature2.properties.id && featureLevelIndex < levels.indexOf(featuresByCode[groupID].properties.level);
+             });
+
+             if (_i4 === "0") {
+               sharedGroups = memberGroups;
+             } else {
+               sharedGroups = sharedGroups.filter(function (groupID) {
+                 return memberGroups.indexOf(groupID) !== -1;
+               });
+             }
+           };
+
+           for (var _i4 in props.members) {
+             _loop(_i4);
+           }
+
+           props.groups = props.groups.concat(sharedGroups.filter(function (groupID) {
+             return props.groups.indexOf(groupID) === -1;
+           }));
+
+           for (var j in sharedGroups) {
+             var groupFeature = featuresByCode[sharedGroups[j]];
+
+             if (groupFeature.properties.members.indexOf(props.id) === -1) {
+               groupFeature.properties.members.push(props.id);
+             }
+           }
+         }
+
+         function loadRoadSpeedUnit(feature2) {
+           var props = feature2.properties;
+
+           if (feature2.geometry) {
+             if (!props.roadSpeedUnit) props.roadSpeedUnit = "km/h";
+           } else if (props.members) {
+             var vals = Array.from(new Set(props.members.map(function (id) {
+               var member = featuresByCode[id];
+               if (member.geometry) return member.properties.roadSpeedUnit || "km/h";
+             }).filter(Boolean)));
+             if (vals.length === 1) props.roadSpeedUnit = vals[0];
+           }
+         }
+
+         function loadRoadHeightUnit(feature2) {
+           var props = feature2.properties;
+
+           if (feature2.geometry) {
+             if (!props.roadHeightUnit) props.roadHeightUnit = "m";
+           } else if (props.members) {
+             var vals = Array.from(new Set(props.members.map(function (id) {
+               var member = featuresByCode[id];
+               if (member.geometry) return member.properties.roadHeightUnit || "m";
+             }).filter(Boolean)));
+             if (vals.length === 1) props.roadHeightUnit = vals[0];
+           }
+         }
+
+         function loadDriveSide(feature2) {
+           var props = feature2.properties;
+
+           if (feature2.geometry) {
+             if (!props.driveSide) props.driveSide = "right";
+           } else if (props.members) {
+             var vals = Array.from(new Set(props.members.map(function (id) {
+               var member = featuresByCode[id];
+               if (member.geometry) return member.properties.driveSide || "right";
+             }).filter(Boolean)));
+             if (vals.length === 1) props.driveSide = vals[0];
+           }
+         }
+
+         function loadCallingCodes(feature2) {
+           var props = feature2.properties;
+
+           if (!feature2.geometry && props.members) {
+             props.callingCodes = Array.from(new Set(props.members.reduce(function (array, id) {
+               var member = featuresByCode[id];
+               if (member.geometry && member.properties.callingCodes) return array.concat(member.properties.callingCodes);
+               return array;
+             }, [])));
+           }
+         }
+
+         function loadFlag(feature2) {
+           if (!feature2.properties.iso1A2) return;
+           var flag = feature2.properties.iso1A2.replace(/./g, function (_char) {
+             return String.fromCodePoint(_char.charCodeAt(0) + 127397);
+           });
+           feature2.properties.emojiFlag = flag;
+         }
+
+         function loadMembersForGroupsOf(feature2) {
+           for (var j in feature2.properties.groups) {
+             var groupID = feature2.properties.groups[j];
+             var groupFeature = featuresByCode[groupID];
+             if (!groupFeature.properties.members) groupFeature.properties.members = [];
+             groupFeature.properties.members.push(feature2.properties.id);
+           }
+         }
+
+         function cacheFeatureByIDs(feature2) {
+           var ids = [];
+
+           for (var k in identifierProps) {
+             var prop = identifierProps[k];
+             var id = feature2.properties[prop];
+             if (id) ids.push(id);
+           }
+
+           if (feature2.properties.aliases) {
+             for (var j in feature2.properties.aliases) {
+               ids.push(feature2.properties.aliases[j]);
+             }
+           }
+
+           for (var _i5 in ids) {
+             var _id = canonicalID(ids[_i5]);
+
+             featuresByCode[_id] = feature2;
+           }
+         }
+       }
+
+       function locArray(loc) {
+         if (Array.isArray(loc)) {
+           return loc;
+         } else if (loc.coordinates) {
+           return loc.coordinates;
+         }
+
+         return loc.geometry.coordinates;
+       }
+
+       function smallestFeature(loc) {
+         var query = locArray(loc);
+         var featureProperties = whichPolygonGetter(query);
+         if (!featureProperties) return null;
+         return featuresByCode[featureProperties.id];
+       }
+
+       function countryFeature(loc) {
+         var feature2 = smallestFeature(loc);
+         if (!feature2) return null;
+         var countryCode = feature2.properties.country || feature2.properties.iso1A2;
+         return featuresByCode[countryCode] || null;
+       }
+
+       var defaultOpts = {
+         level: void 0,
+         maxLevel: void 0,
+         withProp: void 0
+       };
+
+       function featureForLoc(loc, opts) {
+         var targetLevel = opts.level || "country";
+         var maxLevel = opts.maxLevel || "world";
+         var withProp = opts.withProp;
+         var targetLevelIndex = levels.indexOf(targetLevel);
+         if (targetLevelIndex === -1) return null;
+         var maxLevelIndex = levels.indexOf(maxLevel);
+         if (maxLevelIndex === -1) return null;
+         if (maxLevelIndex < targetLevelIndex) return null;
+
+         if (targetLevel === "country") {
+           var fastFeature = countryFeature(loc);
+
+           if (fastFeature) {
+             if (!withProp || fastFeature.properties[withProp]) {
+               return fastFeature;
+             }
+           }
+         }
+
+         var features2 = featuresContaining(loc);
+
+         for (var i in features2) {
+           var feature2 = features2[i];
+           var levelIndex = levels.indexOf(feature2.properties.level);
+
+           if (feature2.properties.level === targetLevel || levelIndex > targetLevelIndex && levelIndex <= maxLevelIndex) {
+             if (!withProp || feature2.properties[withProp]) {
+               return feature2;
+             }
+           }
+         }
+
+         return null;
+       }
+
+       function featureForID(id) {
+         var stringID;
+
+         if (typeof id === "number") {
+           stringID = id.toString();
+
+           if (stringID.length === 1) {
+             stringID = "00" + stringID;
+           } else if (stringID.length === 2) {
+             stringID = "0" + stringID;
+           }
+         } else {
+           stringID = canonicalID(id);
+         }
+
+         return featuresByCode[stringID] || null;
+       }
+
+       function smallestFeaturesForBbox(bbox) {
+         return whichPolygonGetter.bbox(bbox).map(function (props) {
+           return featuresByCode[props.id];
+         });
+       }
+
+       function smallestOrMatchingFeature(query) {
+         if (_typeof(query) === "object") {
+           return smallestFeature(query);
+         }
+
+         return featureForID(query);
+       }
+
+       function feature$1(query) {
+         var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
+
+         if (_typeof(query) === "object") {
+           return featureForLoc(query, opts);
+         }
+
+         return featureForID(query);
+       }
+
+       function iso1A2Code(query) {
+         var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultOpts;
+         opts.withProp = "iso1A2";
+         var match = feature$1(query, opts);
+         if (!match) return null;
+         return match.properties.iso1A2 || null;
+       }
+
+       function featuresContaining(query, strict) {
+         var matchingFeatures;
+
+         if (Array.isArray(query) && query.length === 4) {
+           matchingFeatures = smallestFeaturesForBbox(query);
+         } else {
+           var smallestOrMatching = smallestOrMatchingFeature(query);
+           matchingFeatures = smallestOrMatching ? [smallestOrMatching] : [];
+         }
+
+         if (!matchingFeatures.length) return [];
+         var returnFeatures;
+
+         if (!strict || _typeof(query) === "object") {
+           returnFeatures = matchingFeatures.slice();
+         } else {
+           returnFeatures = [];
+         }
+
+         for (var j in matchingFeatures) {
+           var properties = matchingFeatures[j].properties;
+
+           for (var i in properties.groups) {
+             var groupID = properties.groups[i];
+             var groupFeature = featuresByCode[groupID];
+
+             if (returnFeatures.indexOf(groupFeature) === -1) {
+               returnFeatures.push(groupFeature);
+             }
+           }
+         }
+
+         return returnFeatures;
+       }
+
+       function featuresIn(id, strict) {
+         var feature2 = featureForID(id);
+         if (!feature2) return [];
+         var features2 = [];
+
+         if (!strict) {
+           features2.push(feature2);
+         }
+
+         var properties = feature2.properties;
+
+         if (properties.members) {
+           for (var i in properties.members) {
+             var memberID = properties.members[i];
+             features2.push(featuresByCode[memberID]);
+           }
+         }
+
+         return features2;
+       }
+
+       function aggregateFeature(id) {
+         var features2 = featuresIn(id, false);
+         if (features2.length === 0) return null;
+         var aggregateCoordinates = [];
+
+         for (var i in features2) {
+           var feature2 = features2[i];
+
+           if (feature2.geometry && feature2.geometry.type === "MultiPolygon" && feature2.geometry.coordinates) {
+             aggregateCoordinates = aggregateCoordinates.concat(feature2.geometry.coordinates);
+           }
+         }
+
+         return {
+           type: "Feature",
+           properties: features2[0].properties,
+           geometry: {
+             type: "MultiPolygon",
+             coordinates: aggregateCoordinates
+           }
+         };
+       }
+
+       function roadSpeedUnit(query) {
+         var feature2 = smallestOrMatchingFeature(query);
+         return feature2 && feature2.properties.roadSpeedUnit || null;
+       }
+
+       function roadHeightUnit(query) {
+         var feature2 = smallestOrMatchingFeature(query);
+         return feature2 && feature2.properties.roadHeightUnit || null;
+       }
+
+       var geojsonArea = {};
+
+       var wgs84$1 = {};
+
+       wgs84$1.RADIUS = 6378137;
+       wgs84$1.FLATTENING = 1 / 298.257223563;
+       wgs84$1.POLAR_RADIUS = 6356752.3142;
+
+       var wgs84 = wgs84$1;
+       geojsonArea.geometry = geometry;
+       geojsonArea.ring = ringArea;
+
+       function geometry(_) {
+         var area = 0,
+             i;
+
+         switch (_.type) {
+           case 'Polygon':
+             return polygonArea(_.coordinates);
+
+           case 'MultiPolygon':
+             for (i = 0; i < _.coordinates.length; i++) {
+               area += polygonArea(_.coordinates[i]);
+             }
+
+             return area;
+
+           case 'Point':
+           case 'MultiPoint':
+           case 'LineString':
+           case 'MultiLineString':
+             return 0;
+
+           case 'GeometryCollection':
+             for (i = 0; i < _.geometries.length; i++) {
+               area += geometry(_.geometries[i]);
+             }
+
+             return area;
+         }
+       }
+
+       function polygonArea(coords) {
+         var area = 0;
+
+         if (coords && coords.length > 0) {
+           area += Math.abs(ringArea(coords[0]));
+
+           for (var i = 1; i < coords.length; i++) {
+             area -= Math.abs(ringArea(coords[i]));
+           }
+         }
+
+         return area;
+       }
+       /**
+        * Calculate the approximate area of the polygon were it projected onto
+        *     the earth.  Note that this area will be positive if ring is oriented
+        *     clockwise, otherwise it will be negative.
+        *
+        * Reference:
+        * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
+        *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
+        *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
+        *
+        * Returns:
+        * {float} The approximate signed geodesic area of the polygon in square
+        *     meters.
+        */
+
+
+       function ringArea(coords) {
+         var p1,
+             p2,
+             p3,
+             lowerIndex,
+             middleIndex,
+             upperIndex,
+             i,
+             area = 0,
+             coordsLength = coords.length;
+
+         if (coordsLength > 2) {
+           for (i = 0; i < coordsLength; i++) {
+             if (i === coordsLength - 2) {
+               // i = N-2
+               lowerIndex = coordsLength - 2;
+               middleIndex = coordsLength - 1;
+               upperIndex = 0;
+             } else if (i === coordsLength - 1) {
+               // i = N-1
+               lowerIndex = coordsLength - 1;
+               middleIndex = 0;
+               upperIndex = 1;
+             } else {
+               // i = 0 to N-3
+               lowerIndex = i;
+               middleIndex = i + 1;
+               upperIndex = i + 2;
+             }
+
+             p1 = coords[lowerIndex];
+             p2 = coords[middleIndex];
+             p3 = coords[upperIndex];
+             area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));
+           }
+
+           area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
+         }
+
+         return area;
+       }
+
+       function rad(_) {
+         return _ * Math.PI / 180;
+       }
+
+       var inputValidation = {};
+
+       var $$n = _export;
+       var $includes = arrayIncludes.includes;
+       var addToUnscopables$2 = addToUnscopables$6;
+
+       // `Array.prototype.includes` method
+       // https://tc39.es/ecma262/#sec-array.prototype.includes
+       $$n({ target: 'Array', proto: true }, {
+         includes: function includes(el /* , fromIndex = 0 */) {
+           return $includes(this, el, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });
+
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables$2('includes');
+
+       var validateCenter$1 = {};
+
+       validateCenter$1.validateCenter = function validateCenter(center) {
+         var validCenterLengths = [2, 3];
+
+         if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
+           throw new Error("ERROR! Center has to be an array of length two or three");
+         }
+
+         var _center = _slicedToArray(center, 2),
+             lng = _center[0],
+             lat = _center[1];
+
+         if (typeof lng !== "number" || typeof lat !== "number") {
+           throw new Error("ERROR! Longitude and Latitude has to be numbers but where ".concat(_typeof(lng), " and ").concat(_typeof(lat)));
+         }
+
+         if (lng > 180 || lng < -180) {
+           throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
+         }
+
+         if (lat > 90 || lat < -90) {
+           throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
+         }
+       };
+
+       var validateRadius$1 = {};
+
+       validateRadius$1.validateRadius = function validateRadius(radius) {
+         if (typeof radius !== "number") {
+           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
+         }
+
+         if (radius <= 0) {
+           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
+         }
+       };
+
+       var validateNumberOfEdges$1 = {};
+
+       validateNumberOfEdges$1.validateNumberOfEdges = function validateNumberOfEdges(numberOfEdges) {
+         if (typeof numberOfEdges !== "number") {
+           var ARGUMENT_TYPE = Array.isArray(numberOfEdges) ? "array" : _typeof(numberOfEdges);
+           throw new Error("ERROR! Number of edges has to be a number but was: ".concat(ARGUMENT_TYPE));
+         }
+
+         if (numberOfEdges < 3) {
+           throw new Error("ERROR! Number of edges has to be at least 3 but was: ".concat(numberOfEdges));
+         }
+       };
+
+       var validateEarthRadius$1 = {};
+
+       validateEarthRadius$1.validateEarthRadius = function validateEarthRadius(earthRadius) {
+         if (typeof earthRadius !== "number") {
+           var ARGUMENT_TYPE = Array.isArray(earthRadius) ? "array" : _typeof(earthRadius);
+           throw new Error("ERROR! Earth radius has to be a number but was: ".concat(ARGUMENT_TYPE));
+         }
+
+         if (earthRadius <= 0) {
+           throw new Error("ERROR! Earth radius has to be a positive number but was: ".concat(earthRadius));
+         }
+       };
+
+       var validateBearing$1 = {};
+
+       validateBearing$1.validateBearing = function validateBearing(bearing) {
+         if (typeof bearing !== "number") {
+           var ARGUMENT_TYPE = Array.isArray(bearing) ? "array" : _typeof(bearing);
+           throw new Error("ERROR! Bearing has to be a number but was: ".concat(ARGUMENT_TYPE));
+         }
+       };
+
+       var validateCenter = validateCenter$1.validateCenter;
+       var validateRadius = validateRadius$1.validateRadius;
+       var validateNumberOfEdges = validateNumberOfEdges$1.validateNumberOfEdges;
+       var validateEarthRadius = validateEarthRadius$1.validateEarthRadius;
+       var validateBearing = validateBearing$1.validateBearing;
+
+       function validateInput$1(_ref) {
+         var center = _ref.center,
+             radius = _ref.radius,
+             numberOfEdges = _ref.numberOfEdges,
+             earthRadius = _ref.earthRadius,
+             bearing = _ref.bearing;
+         validateCenter(center);
+         validateRadius(radius);
+         validateNumberOfEdges(numberOfEdges);
+         validateEarthRadius(earthRadius);
+         validateBearing(bearing);
+       }
+
+       inputValidation.validateCenter = validateCenter;
+       inputValidation.validateRadius = validateRadius;
+       inputValidation.validateNumberOfEdges = validateNumberOfEdges;
+       inputValidation.validateEarthRadius = validateEarthRadius;
+       inputValidation.validateBearing = validateBearing;
+       inputValidation.validateInput = validateInput$1;
+
+       var validateInput = inputValidation.validateInput;
+       var defaultEarthRadius = 6378137; // equatorial Earth radius
+
+       function toRadians(angleInDegrees) {
+         return angleInDegrees * Math.PI / 180;
+       }
+
+       function toDegrees(angleInRadians) {
+         return angleInRadians * 180 / Math.PI;
+       }
+
+       function offset(c1, distance, earthRadius, bearing) {
+         var lat1 = toRadians(c1[1]);
+         var lon1 = toRadians(c1[0]);
+         var dByR = distance / earthRadius;
+         var lat = Math.asin(Math.sin(lat1) * Math.cos(dByR) + Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));
+         var lon = lon1 + Math.atan2(Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1), Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));
+         return [toDegrees(lon), toDegrees(lat)];
+       }
+
+       var circleToPolygon = function circleToPolygon(center, radius, options) {
+         var n = getNumberOfEdges(options);
+         var earthRadius = getEarthRadius(options);
+         var bearing = getBearing(options);
+         var direction = getDirection(options); // validateInput() throws error on invalid input and do nothing on valid input
+
+         validateInput({
+           center: center,
+           radius: radius,
+           numberOfEdges: n,
+           earthRadius: earthRadius,
+           bearing: bearing
+         });
+         var start = toRadians(bearing);
+         var coordinates = [];
+
+         for (var i = 0; i < n; ++i) {
+           coordinates.push(offset(center, radius, earthRadius, start + direction * 2 * Math.PI * -i / n));
+         }
+
+         coordinates.push(coordinates[0]);
+         return {
+           type: "Polygon",
+           coordinates: [coordinates]
+         };
+       };
+
+       function getNumberOfEdges(options) {
+         if (isUndefinedOrNull(options)) {
+           return 32;
+         } else if (isObjectNotArray(options)) {
+           var numberOfEdges = options.numberOfEdges;
+           return numberOfEdges === undefined ? 32 : numberOfEdges;
+         }
+
+         return options;
+       }
+
+       function getEarthRadius(options) {
+         if (isUndefinedOrNull(options)) {
+           return defaultEarthRadius;
+         } else if (isObjectNotArray(options)) {
+           var earthRadius = options.earthRadius;
+           return earthRadius === undefined ? defaultEarthRadius : earthRadius;
+         }
+
+         return defaultEarthRadius;
+       }
+
+       function getDirection(options) {
+         if (isObjectNotArray(options) && options.rightHandRule) {
+           return -1;
+         }
+
+         return 1;
+       }
+
+       function getBearing(options) {
+         if (isUndefinedOrNull(options)) {
+           return 0;
+         } else if (isObjectNotArray(options)) {
+           var bearing = options.bearing;
+           return bearing === undefined ? 0 : bearing;
+         }
+
+         return 0;
+       }
+
+       function isObjectNotArray(argument) {
+         return argument !== null && _typeof(argument) === "object" && !Array.isArray(argument);
+       }
+
+       function isUndefinedOrNull(argument) {
+         return argument === null || argument === undefined;
+       }
+
+       var $$m = _export;
+
+       // `Number.EPSILON` constant
+       // https://tc39.es/ecma262/#sec-number.epsilon
+       $$m({ target: 'Number', stat: true }, {
+         EPSILON: Math.pow(2, -52)
+       });
+
+       var uncurryThis$8 = functionUncurryThis;
+       var requireObjectCoercible$4 = requireObjectCoercible$e;
+       var toString$5 = toString$k;
+
+       var quot = /"/g;
+       var replace$2 = uncurryThis$8(''.replace);
+
+       // `CreateHTML` abstract operation
+       // https://tc39.es/ecma262/#sec-createhtml
+       var createHtml = function (string, tag, attribute, value) {
+         var S = toString$5(requireObjectCoercible$4(string));
+         var p1 = '<' + tag;
+         if (attribute !== '') p1 += ' ' + attribute + '="' + replace$2(toString$5(value), quot, '&quot;') + '"';
+         return p1 + '>' + S + '</' + tag + '>';
+       };
+
+       var fails$6 = fails$S;
+
+       // check the existence of a method, lowercase
+       // of a tag and escaping quotes in arguments
+       var stringHtmlForced = function (METHOD_NAME) {
+         return fails$6(function () {
+           var test = ''[METHOD_NAME]('"');
+           return test !== test.toLowerCase() || test.split('"').length > 3;
+         });
+       };
+
+       var $$l = _export;
+       var createHTML = createHtml;
+       var forcedStringHTMLMethod = stringHtmlForced;
+
+       // `String.prototype.link` method
+       // https://tc39.es/ecma262/#sec-string.prototype.link
+       $$l({ target: 'String', proto: true, forced: forcedStringHTMLMethod('link') }, {
+         link: function link(url) {
+           return createHTML(this, 'a', 'href', url);
+         }
+       });
+
+       /**
+        * splaytree v3.1.0
+        * Fast Splay tree for Node and browser
+        *
+        * @author Alexander Milevski <info@w8r.name>
+        * @license MIT
+        * @preserve
+        */
+       var Node =
+       /** @class */
+       function () {
+         function Node(key, data) {
+           this.next = null;
+           this.key = key;
+           this.data = data;
+           this.left = null;
+           this.right = null;
+         }
+
+         return Node;
+       }();
+       /* follows "An implementation of top-down splaying"
+        * by D. Sleator <sleator@cs.cmu.edu> March 1992
+        */
+
+
+       function DEFAULT_COMPARE(a, b) {
+         return a > b ? 1 : a < b ? -1 : 0;
+       }
+       /**
+        * Simple top down splay, not requiring i to be in the tree t.
+        */
+
+
+       function splay(i, t, comparator) {
+         var N = new Node(null, null);
+         var l = N;
+         var r = N;
+
+         while (true) {
+           var cmp = comparator(i, t.key); //if (i < t.key) {
+
+           if (cmp < 0) {
+             if (t.left === null) break; //if (i < t.left.key) {
+
+             if (comparator(i, t.left.key) < 0) {
+               var y = t.left;
+               /* rotate right */
+
+               t.left = y.right;
+               y.right = t;
+               t = y;
+               if (t.left === null) break;
+             }
+
+             r.left = t;
+             /* link right */
+
+             r = t;
+             t = t.left; //} else if (i > t.key) {
+           } else if (cmp > 0) {
+             if (t.right === null) break; //if (i > t.right.key) {
+
+             if (comparator(i, t.right.key) > 0) {
+               var y = t.right;
+               /* rotate left */
+
+               t.right = y.left;
+               y.left = t;
+               t = y;
+               if (t.right === null) break;
+             }
+
+             l.right = t;
+             /* link left */
+
+             l = t;
+             t = t.right;
+           } else break;
+         }
+         /* assemble */
+
+
+         l.right = t.left;
+         r.left = t.right;
+         t.left = N.right;
+         t.right = N.left;
+         return t;
+       }
+
+       function insert(i, data, t, comparator) {
+         var node = new Node(i, data);
+
+         if (t === null) {
+           node.left = node.right = null;
+           return node;
+         }
+
+         t = splay(i, t, comparator);
+         var cmp = comparator(i, t.key);
+
+         if (cmp < 0) {
+           node.left = t.left;
+           node.right = t;
+           t.left = null;
+         } else if (cmp >= 0) {
+           node.right = t.right;
+           node.left = t;
+           t.right = null;
+         }
+
+         return node;
+       }
+
+       function split$2(key, v, comparator) {
+         var left = null;
+         var right = null;
+
+         if (v) {
+           v = splay(key, v, comparator);
+           var cmp = comparator(v.key, key);
+
+           if (cmp === 0) {
+             left = v.left;
+             right = v.right;
+           } else if (cmp < 0) {
+             right = v.right;
+             v.right = null;
+             left = v;
+           } else {
+             left = v.left;
+             v.left = null;
+             right = v;
+           }
+         }
+
+         return {
+           left: left,
+           right: right
+         };
+       }
+
+       function merge$3(left, right, comparator) {
+         if (right === null) return left;
+         if (left === null) return right;
+         right = splay(left.key, right, comparator);
+         right.left = left;
+         return right;
+       }
+       /**
+        * Prints level of the tree
+        */
+
+
+       function printRow(root, prefix, isTail, out, printNode) {
+         if (root) {
+           out("" + prefix + (isTail ? '└── ' : '├── ') + printNode(root) + "\n");
+           var indent = prefix + (isTail ? '    ' : '│   ');
+           if (root.left) printRow(root.left, indent, false, out, printNode);
+           if (root.right) printRow(root.right, indent, true, out, printNode);
+         }
+       }
+
+       var Tree =
+       /** @class */
+       function () {
+         function Tree(comparator) {
+           if (comparator === void 0) {
+             comparator = DEFAULT_COMPARE;
+           }
+
+           this._root = null;
+           this._size = 0;
+           this._comparator = comparator;
+         }
+         /**
+          * Inserts a key, allows duplicates
+          */
+
+
+         Tree.prototype.insert = function (key, data) {
+           this._size++;
+           return this._root = insert(key, data, this._root, this._comparator);
+         };
+         /**
+          * Adds a key, if it is not present in the tree
+          */
+
+
+         Tree.prototype.add = function (key, data) {
+           var node = new Node(key, data);
+
+           if (this._root === null) {
+             node.left = node.right = null;
+             this._size++;
+             this._root = node;
+           }
+
+           var comparator = this._comparator;
+           var t = splay(key, this._root, comparator);
+           var cmp = comparator(key, t.key);
+           if (cmp === 0) this._root = t;else {
+             if (cmp < 0) {
+               node.left = t.left;
+               node.right = t;
+               t.left = null;
+             } else if (cmp > 0) {
+               node.right = t.right;
+               node.left = t;
+               t.right = null;
+             }
+
+             this._size++;
+             this._root = node;
+           }
+           return this._root;
+         };
+         /**
+          * @param  {Key} key
+          * @return {Node|null}
+          */
+
+
+         Tree.prototype.remove = function (key) {
+           this._root = this._remove(key, this._root, this._comparator);
+         };
+         /**
+          * Deletes i from the tree if it's there
+          */
+
+
+         Tree.prototype._remove = function (i, t, comparator) {
+           var x;
+           if (t === null) return null;
+           t = splay(i, t, comparator);
+           var cmp = comparator(i, t.key);
+
+           if (cmp === 0) {
+             /* found it */
+             if (t.left === null) {
+               x = t.right;
+             } else {
+               x = splay(i, t.left, comparator);
+               x.right = t.right;
+             }
+
+             this._size--;
+             return x;
+           }
+
+           return t;
+           /* It wasn't there */
+         };
+         /**
+          * Removes and returns the node with smallest key
+          */
+
+
+         Tree.prototype.pop = function () {
+           var node = this._root;
+
+           if (node) {
+             while (node.left) {
+               node = node.left;
+             }
+
+             this._root = splay(node.key, this._root, this._comparator);
+             this._root = this._remove(node.key, this._root, this._comparator);
+             return {
+               key: node.key,
+               data: node.data
+             };
+           }
+
+           return null;
+         };
+         /**
+          * Find without splaying
+          */
+
+
+         Tree.prototype.findStatic = function (key) {
+           var current = this._root;
+           var compare = this._comparator;
+
+           while (current) {
+             var cmp = compare(key, current.key);
+             if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
+           }
+
+           return null;
+         };
+
+         Tree.prototype.find = function (key) {
+           if (this._root) {
+             this._root = splay(key, this._root, this._comparator);
+             if (this._comparator(key, this._root.key) !== 0) return null;
+           }
+
+           return this._root;
+         };
+
+         Tree.prototype.contains = function (key) {
+           var current = this._root;
+           var compare = this._comparator;
+
+           while (current) {
+             var cmp = compare(key, current.key);
+             if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
+           }
+
+           return false;
+         };
+
+         Tree.prototype.forEach = function (visitor, ctx) {
+           var current = this._root;
+           var Q = [];
+           /* Initialize stack s */
+
+           var done = false;
+
+           while (!done) {
+             if (current !== null) {
+               Q.push(current);
+               current = current.left;
+             } else {
+               if (Q.length !== 0) {
+                 current = Q.pop();
+                 visitor.call(ctx, current);
+                 current = current.right;
+               } else done = true;
+             }
+           }
+
+           return this;
+         };
+         /**
+          * Walk key range from `low` to `high`. Stops if `fn` returns a value.
+          */
+
+
+         Tree.prototype.range = function (low, high, fn, ctx) {
+           var Q = [];
+           var compare = this._comparator;
+           var node = this._root;
+           var cmp;
+
+           while (Q.length !== 0 || node) {
+             if (node) {
+               Q.push(node);
+               node = node.left;
+             } else {
+               node = Q.pop();
+               cmp = compare(node.key, high);
+
+               if (cmp > 0) {
+                 break;
+               } else if (compare(node.key, low) >= 0) {
+                 if (fn.call(ctx, node)) return this; // stop if smth is returned
+               }
+
+               node = node.right;
+             }
+           }
+
+           return this;
+         };
+         /**
+          * Returns array of keys
+          */
+
+
+         Tree.prototype.keys = function () {
+           var keys = [];
+           this.forEach(function (_a) {
+             var key = _a.key;
+             return keys.push(key);
+           });
+           return keys;
+         };
+         /**
+          * Returns array of all the data in the nodes
+          */
+
+
+         Tree.prototype.values = function () {
+           var values = [];
+           this.forEach(function (_a) {
+             var data = _a.data;
+             return values.push(data);
+           });
+           return values;
+         };
+
+         Tree.prototype.min = function () {
+           if (this._root) return this.minNode(this._root).key;
+           return null;
+         };
+
+         Tree.prototype.max = function () {
+           if (this._root) return this.maxNode(this._root).key;
+           return null;
+         };
+
+         Tree.prototype.minNode = function (t) {
+           if (t === void 0) {
+             t = this._root;
+           }
+
+           if (t) while (t.left) {
+             t = t.left;
+           }
+           return t;
+         };
+
+         Tree.prototype.maxNode = function (t) {
+           if (t === void 0) {
+             t = this._root;
+           }
+
+           if (t) while (t.right) {
+             t = t.right;
+           }
+           return t;
+         };
+         /**
+          * Returns node at given index
+          */
+
+
+         Tree.prototype.at = function (index) {
+           var current = this._root;
+           var done = false;
+           var i = 0;
+           var Q = [];
+
+           while (!done) {
+             if (current) {
+               Q.push(current);
+               current = current.left;
+             } else {
+               if (Q.length > 0) {
+                 current = Q.pop();
+                 if (i === index) return current;
+                 i++;
+                 current = current.right;
+               } else done = true;
+             }
+           }
+
+           return null;
+         };
+
+         Tree.prototype.next = function (d) {
+           var root = this._root;
+           var successor = null;
+
+           if (d.right) {
+             successor = d.right;
+
+             while (successor.left) {
+               successor = successor.left;
+             }
+
+             return successor;
+           }
+
+           var comparator = this._comparator;
+
+           while (root) {
+             var cmp = comparator(d.key, root.key);
+             if (cmp === 0) break;else if (cmp < 0) {
+               successor = root;
+               root = root.left;
+             } else root = root.right;
+           }
+
+           return successor;
+         };
+
+         Tree.prototype.prev = function (d) {
+           var root = this._root;
+           var predecessor = null;
+
+           if (d.left !== null) {
+             predecessor = d.left;
+
+             while (predecessor.right) {
+               predecessor = predecessor.right;
+             }
+
+             return predecessor;
+           }
+
+           var comparator = this._comparator;
+
+           while (root) {
+             var cmp = comparator(d.key, root.key);
+             if (cmp === 0) break;else if (cmp < 0) root = root.left;else {
+               predecessor = root;
+               root = root.right;
+             }
+           }
+
+           return predecessor;
+         };
+
+         Tree.prototype.clear = function () {
+           this._root = null;
+           this._size = 0;
+           return this;
+         };
+
+         Tree.prototype.toList = function () {
+           return toList(this._root);
+         };
+         /**
+          * Bulk-load items. Both array have to be same size
+          */
+
+
+         Tree.prototype.load = function (keys, values, presort) {
+           if (values === void 0) {
+             values = [];
+           }
+
+           if (presort === void 0) {
+             presort = false;
+           }
+
+           var size = keys.length;
+           var comparator = this._comparator; // sort if needed
+
+           if (presort) sort(keys, values, 0, size - 1, comparator);
+
+           if (this._root === null) {
+             // empty tree
+             this._root = loadRecursive(keys, values, 0, size);
+             this._size = size;
+           } else {
+             // that re-builds the whole tree from two in-order traversals
+             var mergedList = mergeLists(this.toList(), createList(keys, values), comparator);
+             size = this._size + size;
+             this._root = sortedListToBST({
+               head: mergedList
+             }, 0, size);
+           }
+
+           return this;
+         };
+
+         Tree.prototype.isEmpty = function () {
+           return this._root === null;
+         };
+
+         Object.defineProperty(Tree.prototype, "size", {
+           get: function get() {
+             return this._size;
+           },
+           enumerable: true,
+           configurable: true
+         });
+         Object.defineProperty(Tree.prototype, "root", {
+           get: function get() {
+             return this._root;
+           },
+           enumerable: true,
+           configurable: true
+         });
+
+         Tree.prototype.toString = function (printNode) {
+           if (printNode === void 0) {
+             printNode = function printNode(n) {
+               return String(n.key);
+             };
+           }
+
+           var out = [];
+           printRow(this._root, '', true, function (v) {
+             return out.push(v);
+           }, printNode);
+           return out.join('');
+         };
+
+         Tree.prototype.update = function (key, newKey, newData) {
+           var comparator = this._comparator;
+
+           var _a = split$2(key, this._root, comparator),
+               left = _a.left,
+               right = _a.right;
+
+           if (comparator(key, newKey) < 0) {
+             right = insert(newKey, newData, right, comparator);
+           } else {
+             left = insert(newKey, newData, left, comparator);
+           }
+
+           this._root = merge$3(left, right, comparator);
+         };
+
+         Tree.prototype.split = function (key) {
+           return split$2(key, this._root, this._comparator);
+         };
+
+         return Tree;
+       }();
+
+       function loadRecursive(keys, values, start, end) {
+         var size = end - start;
+
+         if (size > 0) {
+           var middle = start + Math.floor(size / 2);
+           var key = keys[middle];
+           var data = values[middle];
+           var node = new Node(key, data);
+           node.left = loadRecursive(keys, values, start, middle);
+           node.right = loadRecursive(keys, values, middle + 1, end);
+           return node;
+         }
+
+         return null;
+       }
+
+       function createList(keys, values) {
+         var head = new Node(null, null);
+         var p = head;
+
+         for (var i = 0; i < keys.length; i++) {
+           p = p.next = new Node(keys[i], values[i]);
+         }
+
+         p.next = null;
+         return head.next;
+       }
+
+       function toList(root) {
+         var current = root;
+         var Q = [];
+         var done = false;
+         var head = new Node(null, null);
+         var p = head;
+
+         while (!done) {
+           if (current) {
+             Q.push(current);
+             current = current.left;
+           } else {
+             if (Q.length > 0) {
+               current = p = p.next = Q.pop();
+               current = current.right;
+             } else done = true;
+           }
+         }
+
+         p.next = null; // that'll work even if the tree was empty
+
+         return head.next;
+       }
+
+       function sortedListToBST(list, start, end) {
+         var size = end - start;
+
+         if (size > 0) {
+           var middle = start + Math.floor(size / 2);
+           var left = sortedListToBST(list, start, middle);
+           var root = list.head;
+           root.left = left;
+           list.head = list.head.next;
+           root.right = sortedListToBST(list, middle + 1, end);
+           return root;
+         }
+
+         return null;
+       }
+
+       function mergeLists(l1, l2, compare) {
+         var head = new Node(null, null); // dummy
+
+         var p = head;
+         var p1 = l1;
+         var p2 = l2;
+
+         while (p1 !== null && p2 !== null) {
+           if (compare(p1.key, p2.key) < 0) {
+             p.next = p1;
+             p1 = p1.next;
+           } else {
+             p.next = p2;
+             p2 = p2.next;
+           }
+
+           p = p.next;
+         }
+
+         if (p1 !== null) {
+           p.next = p1;
+         } else if (p2 !== null) {
+           p.next = p2;
+         }
+
+         return head.next;
+       }
+
+       function sort(keys, values, left, right, compare) {
+         if (left >= right) return;
+         var pivot = keys[left + right >> 1];
+         var i = left - 1;
+         var j = right + 1;
+
+         while (true) {
+           do {
+             i++;
+           } while (compare(keys[i], pivot) < 0);
+
+           do {
+             j--;
+           } while (compare(keys[j], pivot) > 0);
+
+           if (i >= j) break;
+           var tmp = keys[i];
+           keys[i] = keys[j];
+           keys[j] = tmp;
+           tmp = values[i];
+           values[i] = values[j];
+           values[j] = tmp;
+         }
+
+         sort(keys, values, left, j, compare);
+         sort(keys, values, j + 1, right, compare);
+       }
+
+       function _classCallCheck(instance, Constructor) {
+         if (!(instance instanceof Constructor)) {
+           throw new TypeError("Cannot call a class as a function");
+         }
+       }
+
+       function _defineProperties(target, props) {
+         for (var i = 0; i < props.length; i++) {
+           var descriptor = props[i];
+           descriptor.enumerable = descriptor.enumerable || false;
+           descriptor.configurable = true;
+           if ("value" in descriptor) descriptor.writable = true;
+           Object.defineProperty(target, descriptor.key, descriptor);
+         }
+       }
+
+       function _createClass(Constructor, protoProps, staticProps) {
+         if (protoProps) _defineProperties(Constructor.prototype, protoProps);
+         if (staticProps) _defineProperties(Constructor, staticProps);
+         return Constructor;
+       }
+       /**
+        * A bounding box has the format:
+        *
+        *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
+        *
+        */
+
+
+       var isInBbox = function isInBbox(bbox, point) {
+         return bbox.ll.x <= point.x && point.x <= bbox.ur.x && bbox.ll.y <= point.y && point.y <= bbox.ur.y;
+       };
+       /* Returns either null, or a bbox (aka an ordered pair of points)
+        * If there is only one point of overlap, a bbox with identical points
+        * will be returned */
+
+
+       var getBboxOverlap = function getBboxOverlap(b1, b2) {
+         // check if the bboxes overlap at all
+         if (b2.ur.x < b1.ll.x || b1.ur.x < b2.ll.x || b2.ur.y < b1.ll.y || b1.ur.y < b2.ll.y) return null; // find the middle two X values
+
+         var lowerX = b1.ll.x < b2.ll.x ? b2.ll.x : b1.ll.x;
+         var upperX = b1.ur.x < b2.ur.x ? b1.ur.x : b2.ur.x; // find the middle two Y values
+
+         var lowerY = b1.ll.y < b2.ll.y ? b2.ll.y : b1.ll.y;
+         var upperY = b1.ur.y < b2.ur.y ? b1.ur.y : b2.ur.y; // put those middle values together to get the overlap
+
+         return {
+           ll: {
+             x: lowerX,
+             y: lowerY
+           },
+           ur: {
+             x: upperX,
+             y: upperY
+           }
+         };
+       };
+       /* Javascript doesn't do integer math. Everything is
+        * floating point with percision Number.EPSILON.
+        *
+        * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON
+        */
+
+
+       var epsilon = Number.EPSILON; // IE Polyfill
+
+       if (epsilon === undefined) epsilon = Math.pow(2, -52);
+       var EPSILON_SQ = epsilon * epsilon;
+       /* FLP comparator */
+
+       var cmp = function cmp(a, b) {
+         // check if they're both 0
+         if (-epsilon < a && a < epsilon) {
+           if (-epsilon < b && b < epsilon) {
+             return 0;
+           }
+         } // check if they're flp equal
+
+
+         var ab = a - b;
+
+         if (ab * ab < EPSILON_SQ * a * b) {
+           return 0;
+         } // normal comparison
+
+
+         return a < b ? -1 : 1;
+       };
+       /**
+        * This class rounds incoming values sufficiently so that
+        * floating points problems are, for the most part, avoided.
+        *
+        * Incoming points are have their x & y values tested against
+        * all previously seen x & y values. If either is 'too close'
+        * to a previously seen value, it's value is 'snapped' to the
+        * previously seen value.
+        *
+        * All points should be rounded by this class before being
+        * stored in any data structures in the rest of this algorithm.
+        */
+
+
+       var PtRounder = /*#__PURE__*/function () {
+         function PtRounder() {
+           _classCallCheck(this, PtRounder);
+
+           this.reset();
+         }
+
+         _createClass(PtRounder, [{
+           key: "reset",
+           value: function reset() {
+             this.xRounder = new CoordRounder();
+             this.yRounder = new CoordRounder();
+           }
+         }, {
+           key: "round",
+           value: function round(x, y) {
+             return {
+               x: this.xRounder.round(x),
+               y: this.yRounder.round(y)
+             };
+           }
+         }]);
+
+         return PtRounder;
+       }();
+
+       var CoordRounder = /*#__PURE__*/function () {
+         function CoordRounder() {
+           _classCallCheck(this, CoordRounder);
+
+           this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON
+
+           this.round(0);
+         } // Note: this can rounds input values backwards or forwards.
+         //       You might ask, why not restrict this to just rounding
+         //       forwards? Wouldn't that allow left endpoints to always
+         //       remain left endpoints during splitting (never change to
+         //       right). No - it wouldn't, because we snap intersections
+         //       to endpoints (to establish independence from the segment
+         //       angle for t-intersections).
+
+
+         _createClass(CoordRounder, [{
+           key: "round",
+           value: function round(coord) {
+             var node = this.tree.add(coord);
+             var prevNode = this.tree.prev(node);
+
+             if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
+               this.tree.remove(coord);
+               return prevNode.key;
+             }
+
+             var nextNode = this.tree.next(node);
+
+             if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
+               this.tree.remove(coord);
+               return nextNode.key;
+             }
+
+             return coord;
+           }
+         }]);
+
+         return CoordRounder;
+       }(); // singleton available by import
+
+
+       var rounder = new PtRounder();
+       /* Cross Product of two vectors with first point at origin */
+
+       var crossProduct = function crossProduct(a, b) {
+         return a.x * b.y - a.y * b.x;
+       };
+       /* Dot Product of two vectors with first point at origin */
+
+
+       var dotProduct = function dotProduct(a, b) {
+         return a.x * b.x + a.y * b.y;
+       };
+       /* Comparator for two vectors with same starting point */
+
+
+       var compareVectorAngles = function compareVectorAngles(basePt, endPt1, endPt2) {
+         var v1 = {
+           x: endPt1.x - basePt.x,
+           y: endPt1.y - basePt.y
+         };
+         var v2 = {
+           x: endPt2.x - basePt.x,
+           y: endPt2.y - basePt.y
+         };
+         var kross = crossProduct(v1, v2);
+         return cmp(kross, 0);
+       };
+
+       var length = function length(v) {
+         return Math.sqrt(dotProduct(v, v));
+       };
+       /* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */
+
+
+       var sineOfAngle = function sineOfAngle(pShared, pBase, pAngle) {
+         var vBase = {
+           x: pBase.x - pShared.x,
+           y: pBase.y - pShared.y
+         };
+         var vAngle = {
+           x: pAngle.x - pShared.x,
+           y: pAngle.y - pShared.y
+         };
+         return crossProduct(vAngle, vBase) / length(vAngle) / length(vBase);
+       };
+       /* Get the cosine of the angle from pShared -> pAngle to pShaed -> pBase */
+
+
+       var cosineOfAngle = function cosineOfAngle(pShared, pBase, pAngle) {
+         var vBase = {
+           x: pBase.x - pShared.x,
+           y: pBase.y - pShared.y
+         };
+         var vAngle = {
+           x: pAngle.x - pShared.x,
+           y: pAngle.y - pShared.y
+         };
+         return dotProduct(vAngle, vBase) / length(vAngle) / length(vBase);
+       };
+       /* Get the x coordinate where the given line (defined by a point and vector)
+        * crosses the horizontal line with the given y coordiante.
+        * In the case of parrallel lines (including overlapping ones) returns null. */
+
+
+       var horizontalIntersection = function horizontalIntersection(pt, v, y) {
+         if (v.y === 0) return null;
+         return {
+           x: pt.x + v.x / v.y * (y - pt.y),
+           y: y
+         };
+       };
+       /* Get the y coordinate where the given line (defined by a point and vector)
+        * crosses the vertical line with the given x coordiante.
+        * In the case of parrallel lines (including overlapping ones) returns null. */
+
+
+       var verticalIntersection = function verticalIntersection(pt, v, x) {
+         if (v.x === 0) return null;
+         return {
+           x: x,
+           y: pt.y + v.y / v.x * (x - pt.x)
+         };
+       };
+       /* Get the intersection of two lines, each defined by a base point and a vector.
+        * In the case of parrallel lines (including overlapping ones) returns null. */
+
+
+       var intersection = function intersection(pt1, v1, pt2, v2) {
+         // take some shortcuts for vertical and horizontal lines
+         // this also ensures we don't calculate an intersection and then discover
+         // it's actually outside the bounding box of the line
+         if (v1.x === 0) return verticalIntersection(pt2, v2, pt1.x);
+         if (v2.x === 0) return verticalIntersection(pt1, v1, pt2.x);
+         if (v1.y === 0) return horizontalIntersection(pt2, v2, pt1.y);
+         if (v2.y === 0) return horizontalIntersection(pt1, v1, pt2.y); // General case for non-overlapping segments.
+         // This algorithm is based on Schneider and Eberly.
+         // http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf - pg 244
+
+         var kross = crossProduct(v1, v2);
+         if (kross == 0) return null;
+         var ve = {
+           x: pt2.x - pt1.x,
+           y: pt2.y - pt1.y
+         };
+         var d1 = crossProduct(ve, v1) / kross;
+         var d2 = crossProduct(ve, v2) / kross; // take the average of the two calculations to minimize rounding error
+
+         var x1 = pt1.x + d2 * v1.x,
+             x2 = pt2.x + d1 * v2.x;
+         var y1 = pt1.y + d2 * v1.y,
+             y2 = pt2.y + d1 * v2.y;
+         var x = (x1 + x2) / 2;
+         var y = (y1 + y2) / 2;
+         return {
+           x: x,
+           y: y
+         };
+       };
+
+       var SweepEvent = /*#__PURE__*/function () {
+         _createClass(SweepEvent, null, [{
+           key: "compare",
+           // for ordering sweep events in the sweep event queue
+           value: function compare(a, b) {
+             // favor event with a point that the sweep line hits first
+             var ptCmp = SweepEvent.comparePoints(a.point, b.point);
+             if (ptCmp !== 0) return ptCmp; // the points are the same, so link them if needed
+
+             if (a.point !== b.point) a.link(b); // favor right events over left
+
+             if (a.isLeft !== b.isLeft) return a.isLeft ? 1 : -1; // we have two matching left or right endpoints
+             // ordering of this case is the same as for their segments
+
+             return Segment.compare(a.segment, b.segment);
+           } // for ordering points in sweep line order
+
+         }, {
+           key: "comparePoints",
+           value: function comparePoints(aPt, bPt) {
+             if (aPt.x < bPt.x) return -1;
+             if (aPt.x > bPt.x) return 1;
+             if (aPt.y < bPt.y) return -1;
+             if (aPt.y > bPt.y) return 1;
+             return 0;
+           } // Warning: 'point' input will be modified and re-used (for performance)
+
+         }]);
+
+         function SweepEvent(point, isLeft) {
+           _classCallCheck(this, SweepEvent);
+
+           if (point.events === undefined) point.events = [this];else point.events.push(this);
+           this.point = point;
+           this.isLeft = isLeft; // this.segment, this.otherSE set by factory
+         }
+
+         _createClass(SweepEvent, [{
+           key: "link",
+           value: function link(other) {
+             if (other.point === this.point) {
+               throw new Error('Tried to link already linked events');
+             }
+
+             var otherEvents = other.point.events;
+
+             for (var i = 0, iMax = otherEvents.length; i < iMax; i++) {
+               var evt = otherEvents[i];
+               this.point.events.push(evt);
+               evt.point = this.point;
+             }
+
+             this.checkForConsuming();
+           }
+           /* Do a pass over our linked events and check to see if any pair
+            * of segments match, and should be consumed. */
+
+         }, {
+           key: "checkForConsuming",
+           value: function checkForConsuming() {
+             // FIXME: The loops in this method run O(n^2) => no good.
+             //        Maintain little ordered sweep event trees?
+             //        Can we maintaining an ordering that avoids the need
+             //        for the re-sorting with getLeftmostComparator in geom-out?
+             // Compare each pair of events to see if other events also match
+             var numEvents = this.point.events.length;
+
+             for (var i = 0; i < numEvents; i++) {
+               var evt1 = this.point.events[i];
+               if (evt1.segment.consumedBy !== undefined) continue;
+
+               for (var j = i + 1; j < numEvents; j++) {
+                 var evt2 = this.point.events[j];
+                 if (evt2.consumedBy !== undefined) continue;
+                 if (evt1.otherSE.point.events !== evt2.otherSE.point.events) continue;
+                 evt1.segment.consume(evt2.segment);
+               }
+             }
+           }
+         }, {
+           key: "getAvailableLinkedEvents",
+           value: function getAvailableLinkedEvents() {
+             // point.events is always of length 2 or greater
+             var events = [];
+
+             for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
+               var evt = this.point.events[i];
+
+               if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
+                 events.push(evt);
+               }
+             }
+
+             return events;
+           }
+           /**
+            * Returns a comparator function for sorting linked events that will
+            * favor the event that will give us the smallest left-side angle.
+            * All ring construction starts as low as possible heading to the right,
+            * so by always turning left as sharp as possible we'll get polygons
+            * without uncessary loops & holes.
+            *
+            * The comparator function has a compute cache such that it avoids
+            * re-computing already-computed values.
+            */
+
+         }, {
+           key: "getLeftmostComparator",
+           value: function getLeftmostComparator(baseEvent) {
+             var _this = this;
+
+             var cache = new Map();
+
+             var fillCache = function fillCache(linkedEvent) {
+               var nextEvent = linkedEvent.otherSE;
+               cache.set(linkedEvent, {
+                 sine: sineOfAngle(_this.point, baseEvent.point, nextEvent.point),
+                 cosine: cosineOfAngle(_this.point, baseEvent.point, nextEvent.point)
+               });
+             };
+
+             return function (a, b) {
+               if (!cache.has(a)) fillCache(a);
+               if (!cache.has(b)) fillCache(b);
+
+               var _cache$get = cache.get(a),
+                   asine = _cache$get.sine,
+                   acosine = _cache$get.cosine;
+
+               var _cache$get2 = cache.get(b),
+                   bsine = _cache$get2.sine,
+                   bcosine = _cache$get2.cosine; // both on or above x-axis
+
+
+               if (asine >= 0 && bsine >= 0) {
+                 if (acosine < bcosine) return 1;
+                 if (acosine > bcosine) return -1;
+                 return 0;
+               } // both below x-axis
+
+
+               if (asine < 0 && bsine < 0) {
+                 if (acosine < bcosine) return -1;
+                 if (acosine > bcosine) return 1;
+                 return 0;
+               } // one above x-axis, one below
+
+
+               if (bsine < asine) return -1;
+               if (bsine > asine) return 1;
+               return 0;
+             };
+           }
+         }]);
+
+         return SweepEvent;
+       }(); // segments and sweep events when all else is identical
+
+
+       var segmentId = 0;
+
+       var Segment = /*#__PURE__*/function () {
+         _createClass(Segment, null, [{
+           key: "compare",
+
+           /* This compare() function is for ordering segments in the sweep
+            * line tree, and does so according to the following criteria:
+            *
+            * Consider the vertical line that lies an infinestimal step to the
+            * right of the right-more of the two left endpoints of the input
+            * segments. Imagine slowly moving a point up from negative infinity
+            * in the increasing y direction. Which of the two segments will that
+            * point intersect first? That segment comes 'before' the other one.
+            *
+            * If neither segment would be intersected by such a line, (if one
+            * or more of the segments are vertical) then the line to be considered
+            * is directly on the right-more of the two left inputs.
+            */
+           value: function compare(a, b) {
+             var alx = a.leftSE.point.x;
+             var blx = b.leftSE.point.x;
+             var arx = a.rightSE.point.x;
+             var brx = b.rightSE.point.x; // check if they're even in the same vertical plane
+
+             if (brx < alx) return 1;
+             if (arx < blx) return -1;
+             var aly = a.leftSE.point.y;
+             var bly = b.leftSE.point.y;
+             var ary = a.rightSE.point.y;
+             var bry = b.rightSE.point.y; // is left endpoint of segment B the right-more?
+
+             if (alx < blx) {
+               // are the two segments in the same horizontal plane?
+               if (bly < aly && bly < ary) return 1;
+               if (bly > aly && bly > ary) return -1; // is the B left endpoint colinear to segment A?
+
+               var aCmpBLeft = a.comparePoint(b.leftSE.point);
+               if (aCmpBLeft < 0) return 1;
+               if (aCmpBLeft > 0) return -1; // is the A right endpoint colinear to segment B ?
+
+               var bCmpARight = b.comparePoint(a.rightSE.point);
+               if (bCmpARight !== 0) return bCmpARight; // colinear segments, consider the one with left-more
+               // left endpoint to be first (arbitrary?)
+
+               return -1;
+             } // is left endpoint of segment A the right-more?
+
+
+             if (alx > blx) {
+               if (aly < bly && aly < bry) return -1;
+               if (aly > bly && aly > bry) return 1; // is the A left endpoint colinear to segment B?
+
+               var bCmpALeft = b.comparePoint(a.leftSE.point);
+               if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
+
+               var aCmpBRight = a.comparePoint(b.rightSE.point);
+               if (aCmpBRight < 0) return 1;
+               if (aCmpBRight > 0) return -1; // colinear segments, consider the one with left-more
+               // left endpoint to be first (arbitrary?)
+
+               return 1;
+             } // if we get here, the two left endpoints are in the same
+             // vertical plane, ie alx === blx
+             // consider the lower left-endpoint to come first
+
+
+             if (aly < bly) return -1;
+             if (aly > bly) return 1; // left endpoints are identical
+             // check for colinearity by using the left-more right endpoint
+             // is the A right endpoint more left-more?
+
+             if (arx < brx) {
+               var _bCmpARight = b.comparePoint(a.rightSE.point);
+
+               if (_bCmpARight !== 0) return _bCmpARight;
+             } // is the B right endpoint more left-more?
+
+
+             if (arx > brx) {
+               var _aCmpBRight = a.comparePoint(b.rightSE.point);
+
+               if (_aCmpBRight < 0) return 1;
+               if (_aCmpBRight > 0) return -1;
+             }
+
+             if (arx !== brx) {
+               // are these two [almost] vertical segments with opposite orientation?
+               // if so, the one with the lower right endpoint comes first
+               var ay = ary - aly;
+               var ax = arx - alx;
+               var by = bry - bly;
+               var bx = brx - blx;
+               if (ay > ax && by < bx) return 1;
+               if (ay < ax && by > bx) return -1;
+             } // we have colinear segments with matching orientation
+             // consider the one with more left-more right endpoint to be first
+
+
+             if (arx > brx) return 1;
+             if (arx < brx) return -1; // if we get here, two two right endpoints are in the same
+             // vertical plane, ie arx === brx
+             // consider the lower right-endpoint to come first
+
+             if (ary < bry) return -1;
+             if (ary > bry) return 1; // right endpoints identical as well, so the segments are idential
+             // fall back on creation order as consistent tie-breaker
+
+             if (a.id < b.id) return -1;
+             if (a.id > b.id) return 1; // identical segment, ie a === b
+
+             return 0;
+           }
+           /* Warning: a reference to ringWindings input will be stored,
+            *  and possibly will be later modified */
+
+         }]);
+
+         function Segment(leftSE, rightSE, rings, windings) {
+           _classCallCheck(this, Segment);
+
+           this.id = ++segmentId;
+           this.leftSE = leftSE;
+           leftSE.segment = this;
+           leftSE.otherSE = rightSE;
+           this.rightSE = rightSE;
+           rightSE.segment = this;
+           rightSE.otherSE = leftSE;
+           this.rings = rings;
+           this.windings = windings; // left unset for performance, set later in algorithm
+           // this.ringOut, this.consumedBy, this.prev
+         }
+
+         _createClass(Segment, [{
+           key: "replaceRightSE",
+
+           /* When a segment is split, the rightSE is replaced with a new sweep event */
+           value: function replaceRightSE(newRightSE) {
+             this.rightSE = newRightSE;
+             this.rightSE.segment = this;
+             this.rightSE.otherSE = this.leftSE;
+             this.leftSE.otherSE = this.rightSE;
+           }
+         }, {
+           key: "bbox",
+           value: function bbox() {
+             var y1 = this.leftSE.point.y;
+             var y2 = this.rightSE.point.y;
+             return {
+               ll: {
+                 x: this.leftSE.point.x,
+                 y: y1 < y2 ? y1 : y2
+               },
+               ur: {
+                 x: this.rightSE.point.x,
+                 y: y1 > y2 ? y1 : y2
+               }
+             };
+           }
+           /* A vector from the left point to the right */
+
+         }, {
+           key: "vector",
+           value: function vector() {
+             return {
+               x: this.rightSE.point.x - this.leftSE.point.x,
+               y: this.rightSE.point.y - this.leftSE.point.y
+             };
+           }
+         }, {
+           key: "isAnEndpoint",
+           value: function isAnEndpoint(pt) {
+             return pt.x === this.leftSE.point.x && pt.y === this.leftSE.point.y || pt.x === this.rightSE.point.x && pt.y === this.rightSE.point.y;
+           }
+           /* Compare this segment with a point.
+            *
+            * A point P is considered to be colinear to a segment if there
+            * exists a distance D such that if we travel along the segment
+            * from one * endpoint towards the other a distance D, we find
+            * ourselves at point P.
+            *
+            * Return value indicates:
+            *
+            *   1: point lies above the segment (to the left of vertical)
+            *   0: point is colinear to segment
+            *  -1: point lies below the segment (to the right of vertical)
+            */
+
+         }, {
+           key: "comparePoint",
+           value: function comparePoint(point) {
+             if (this.isAnEndpoint(point)) return 0;
+             var lPt = this.leftSE.point;
+             var rPt = this.rightSE.point;
+             var v = this.vector(); // Exactly vertical segments.
+
+             if (lPt.x === rPt.x) {
+               if (point.x === lPt.x) return 0;
+               return point.x < lPt.x ? 1 : -1;
+             } // Nearly vertical segments with an intersection.
+             // Check to see where a point on the line with matching Y coordinate is.
+
+
+             var yDist = (point.y - lPt.y) / v.y;
+             var xFromYDist = lPt.x + yDist * v.x;
+             if (point.x === xFromYDist) return 0; // General case.
+             // Check to see where a point on the line with matching X coordinate is.
+
+             var xDist = (point.x - lPt.x) / v.x;
+             var yFromXDist = lPt.y + xDist * v.y;
+             if (point.y === yFromXDist) return 0;
+             return point.y < yFromXDist ? -1 : 1;
+           }
+           /**
+            * Given another segment, returns the first non-trivial intersection
+            * between the two segments (in terms of sweep line ordering), if it exists.
+            *
+            * A 'non-trivial' intersection is one that will cause one or both of the
+            * segments to be split(). As such, 'trivial' vs. 'non-trivial' intersection:
+            *
+            *   * endpoint of segA with endpoint of segB --> trivial
+            *   * endpoint of segA with point along segB --> non-trivial
+            *   * endpoint of segB with point along segA --> non-trivial
+            *   * point along segA with point along segB --> non-trivial
+            *
+            * If no non-trivial intersection exists, return null
+            * Else, return null.
+            */
+
+         }, {
+           key: "getIntersection",
+           value: function getIntersection(other) {
+             // If bboxes don't overlap, there can't be any intersections
+             var tBbox = this.bbox();
+             var oBbox = other.bbox();
+             var bboxOverlap = getBboxOverlap(tBbox, oBbox);
+             if (bboxOverlap === null) return null; // We first check to see if the endpoints can be considered intersections.
+             // This will 'snap' intersections to endpoints if possible, and will
+             // handle cases of colinearity.
+
+             var tlp = this.leftSE.point;
+             var trp = this.rightSE.point;
+             var olp = other.leftSE.point;
+             var orp = other.rightSE.point; // does each endpoint touch the other segment?
+             // note that we restrict the 'touching' definition to only allow segments
+             // to touch endpoints that lie forward from where we are in the sweep line pass
+
+             var touchesOtherLSE = isInBbox(tBbox, olp) && this.comparePoint(olp) === 0;
+             var touchesThisLSE = isInBbox(oBbox, tlp) && other.comparePoint(tlp) === 0;
+             var touchesOtherRSE = isInBbox(tBbox, orp) && this.comparePoint(orp) === 0;
+             var touchesThisRSE = isInBbox(oBbox, trp) && other.comparePoint(trp) === 0; // do left endpoints match?
+
+             if (touchesThisLSE && touchesOtherLSE) {
+               // these two cases are for colinear segments with matching left
+               // endpoints, and one segment being longer than the other
+               if (touchesThisRSE && !touchesOtherRSE) return trp;
+               if (!touchesThisRSE && touchesOtherRSE) return orp; // either the two segments match exactly (two trival intersections)
+               // or just on their left endpoint (one trivial intersection
+
+               return null;
+             } // does this left endpoint matches (other doesn't)
+
+
+             if (touchesThisLSE) {
+               // check for segments that just intersect on opposing endpoints
+               if (touchesOtherRSE) {
+                 if (tlp.x === orp.x && tlp.y === orp.y) return null;
+               } // t-intersection on left endpoint
+
+
+               return tlp;
+             } // does other left endpoint matches (this doesn't)
+
+
+             if (touchesOtherLSE) {
+               // check for segments that just intersect on opposing endpoints
+               if (touchesThisRSE) {
+                 if (trp.x === olp.x && trp.y === olp.y) return null;
+               } // t-intersection on left endpoint
+
+
+               return olp;
+             } // trivial intersection on right endpoints
+
+
+             if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
+
+             if (touchesThisRSE) return trp;
+             if (touchesOtherRSE) return orp; // None of our endpoints intersect. Look for a general intersection between
+             // infinite lines laid over the segments
+
+             var pt = intersection(tlp, this.vector(), olp, other.vector()); // are the segments parrallel? Note that if they were colinear with overlap,
+             // they would have an endpoint intersection and that case was already handled above
+
+             if (pt === null) return null; // is the intersection found between the lines not on the segments?
+
+             if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed
+
+             return rounder.round(pt.x, pt.y);
+           }
+           /**
+            * Split the given segment into multiple segments on the given points.
+            *  * Each existing segment will retain its leftSE and a new rightSE will be
+            *    generated for it.
+            *  * A new segment will be generated which will adopt the original segment's
+            *    rightSE, and a new leftSE will be generated for it.
+            *  * If there are more than two points given to split on, new segments
+            *    in the middle will be generated with new leftSE and rightSE's.
+            *  * An array of the newly generated SweepEvents will be returned.
+            *
+            * Warning: input array of points is modified
+            */
+
+         }, {
+           key: "split",
+           value: function split(point) {
+             var newEvents = [];
+             var alreadyLinked = point.events !== undefined;
+             var newLeftSE = new SweepEvent(point, true);
+             var newRightSE = new SweepEvent(point, false);
+             var oldRightSE = this.rightSE;
+             this.replaceRightSE(newRightSE);
+             newEvents.push(newRightSE);
+             newEvents.push(newLeftSE);
+             var newSeg = new Segment(newLeftSE, oldRightSE, this.rings.slice(), this.windings.slice()); // when splitting a nearly vertical downward-facing segment,
+             // sometimes one of the resulting new segments is vertical, in which
+             // case its left and right events may need to be swapped
+
+             if (SweepEvent.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
+               newSeg.swapEvents();
+             }
+
+             if (SweepEvent.comparePoints(this.leftSE.point, this.rightSE.point) > 0) {
+               this.swapEvents();
+             } // in the point we just used to create new sweep events with was already
+             // linked to other events, we need to check if either of the affected
+             // segments should be consumed
+
+
+             if (alreadyLinked) {
+               newLeftSE.checkForConsuming();
+               newRightSE.checkForConsuming();
+             }
+
+             return newEvents;
+           }
+           /* Swap which event is left and right */
+
+         }, {
+           key: "swapEvents",
+           value: function swapEvents() {
+             var tmpEvt = this.rightSE;
+             this.rightSE = this.leftSE;
+             this.leftSE = tmpEvt;
+             this.leftSE.isLeft = true;
+             this.rightSE.isLeft = false;
+
+             for (var i = 0, iMax = this.windings.length; i < iMax; i++) {
+               this.windings[i] *= -1;
+             }
+           }
+           /* Consume another segment. We take their rings under our wing
+            * and mark them as consumed. Use for perfectly overlapping segments */
+
+         }, {
+           key: "consume",
+           value: function consume(other) {
+             var consumer = this;
+             var consumee = other;
+
+             while (consumer.consumedBy) {
+               consumer = consumer.consumedBy;
+             }
+
+             while (consumee.consumedBy) {
+               consumee = consumee.consumedBy;
+             }
+
+             var cmp = Segment.compare(consumer, consumee);
+             if (cmp === 0) return; // already consumed
+             // the winner of the consumption is the earlier segment
+             // according to sweep line ordering
+
+             if (cmp > 0) {
+               var tmp = consumer;
+               consumer = consumee;
+               consumee = tmp;
+             } // make sure a segment doesn't consume it's prev
+
+
+             if (consumer.prev === consumee) {
+               var _tmp = consumer;
+               consumer = consumee;
+               consumee = _tmp;
+             }
+
+             for (var i = 0, iMax = consumee.rings.length; i < iMax; i++) {
+               var ring = consumee.rings[i];
+               var winding = consumee.windings[i];
+               var index = consumer.rings.indexOf(ring);
+
+               if (index === -1) {
+                 consumer.rings.push(ring);
+                 consumer.windings.push(winding);
+               } else consumer.windings[index] += winding;
+             }
+
+             consumee.rings = null;
+             consumee.windings = null;
+             consumee.consumedBy = consumer; // mark sweep events consumed as to maintain ordering in sweep event queue
+
+             consumee.leftSE.consumedBy = consumer.leftSE;
+             consumee.rightSE.consumedBy = consumer.rightSE;
+           }
+           /* The first segment previous segment chain that is in the result */
+
+         }, {
+           key: "prevInResult",
+           value: function prevInResult() {
+             if (this._prevInResult !== undefined) return this._prevInResult;
+             if (!this.prev) this._prevInResult = null;else if (this.prev.isInResult()) this._prevInResult = this.prev;else this._prevInResult = this.prev.prevInResult();
+             return this._prevInResult;
+           }
+         }, {
+           key: "beforeState",
+           value: function beforeState() {
+             if (this._beforeState !== undefined) return this._beforeState;
+             if (!this.prev) this._beforeState = {
+               rings: [],
+               windings: [],
+               multiPolys: []
+             };else {
+               var seg = this.prev.consumedBy || this.prev;
+               this._beforeState = seg.afterState();
+             }
+             return this._beforeState;
+           }
+         }, {
+           key: "afterState",
+           value: function afterState() {
+             if (this._afterState !== undefined) return this._afterState;
+             var beforeState = this.beforeState();
+             this._afterState = {
+               rings: beforeState.rings.slice(0),
+               windings: beforeState.windings.slice(0),
+               multiPolys: []
+             };
+             var ringsAfter = this._afterState.rings;
+             var windingsAfter = this._afterState.windings;
+             var mpsAfter = this._afterState.multiPolys; // calculate ringsAfter, windingsAfter
+
+             for (var i = 0, iMax = this.rings.length; i < iMax; i++) {
+               var ring = this.rings[i];
+               var winding = this.windings[i];
+               var index = ringsAfter.indexOf(ring);
+
+               if (index === -1) {
+                 ringsAfter.push(ring);
+                 windingsAfter.push(winding);
+               } else windingsAfter[index] += winding;
+             } // calcualte polysAfter
+
+
+             var polysAfter = [];
+             var polysExclude = [];
+
+             for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
+               if (windingsAfter[_i] === 0) continue; // non-zero rule
+
+               var _ring = ringsAfter[_i];
+               var poly = _ring.poly;
+               if (polysExclude.indexOf(poly) !== -1) continue;
+               if (_ring.isExterior) polysAfter.push(poly);else {
+                 if (polysExclude.indexOf(poly) === -1) polysExclude.push(poly);
+
+                 var _index = polysAfter.indexOf(_ring.poly);
+
+                 if (_index !== -1) polysAfter.splice(_index, 1);
+               }
+             } // calculate multiPolysAfter
+
+
+             for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
+               var mp = polysAfter[_i2].multiPoly;
+               if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
+             }
+
+             return this._afterState;
+           }
+           /* Is this segment part of the final result? */
+
+         }, {
+           key: "isInResult",
+           value: function isInResult() {
+             // if we've been consumed, we're not in the result
+             if (this.consumedBy) return false;
+             if (this._isInResult !== undefined) return this._isInResult;
+             var mpsBefore = this.beforeState().multiPolys;
+             var mpsAfter = this.afterState().multiPolys;
+
+             switch (operation.type) {
+               case 'union':
+                 {
+                   // UNION - included iff:
+                   //  * On one side of us there is 0 poly interiors AND
+                   //  * On the other side there is 1 or more.
+                   var noBefores = mpsBefore.length === 0;
+                   var noAfters = mpsAfter.length === 0;
+                   this._isInResult = noBefores !== noAfters;
+                   break;
+                 }
+
+               case 'intersection':
+                 {
+                   // INTERSECTION - included iff:
+                   //  * on one side of us all multipolys are rep. with poly interiors AND
+                   //  * on the other side of us, not all multipolys are repsented
+                   //    with poly interiors
+                   var least;
+                   var most;
+
+                   if (mpsBefore.length < mpsAfter.length) {
+                     least = mpsBefore.length;
+                     most = mpsAfter.length;
+                   } else {
+                     least = mpsAfter.length;
+                     most = mpsBefore.length;
+                   }
+
+                   this._isInResult = most === operation.numMultiPolys && least < most;
+                   break;
+                 }
+
+               case 'xor':
+                 {
+                   // XOR - included iff:
+                   //  * the difference between the number of multipolys represented
+                   //    with poly interiors on our two sides is an odd number
+                   var diff = Math.abs(mpsBefore.length - mpsAfter.length);
+                   this._isInResult = diff % 2 === 1;
+                   break;
+                 }
+
+               case 'difference':
+                 {
+                   // DIFFERENCE included iff:
+                   //  * on exactly one side, we have just the subject
+                   var isJustSubject = function isJustSubject(mps) {
+                     return mps.length === 1 && mps[0].isSubject;
+                   };
+
+                   this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
+                   break;
+                 }
+
+               default:
+                 throw new Error("Unrecognized operation type found ".concat(operation.type));
+             }
+
+             return this._isInResult;
+           }
+         }], [{
+           key: "fromRing",
+           value: function fromRing(pt1, pt2, ring) {
+             var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering
+
+             var cmpPts = SweepEvent.comparePoints(pt1, pt2);
+
+             if (cmpPts < 0) {
+               leftPt = pt1;
+               rightPt = pt2;
+               winding = 1;
+             } else if (cmpPts > 0) {
+               leftPt = pt2;
+               rightPt = pt1;
+               winding = -1;
+             } else throw new Error("Tried to create degenerate segment at [".concat(pt1.x, ", ").concat(pt1.y, "]"));
+
+             var leftSE = new SweepEvent(leftPt, true);
+             var rightSE = new SweepEvent(rightPt, false);
+             return new Segment(leftSE, rightSE, [ring], [winding]);
+           }
+         }]);
+
+         return Segment;
+       }();
+
+       var RingIn = /*#__PURE__*/function () {
+         function RingIn(geomRing, poly, isExterior) {
+           _classCallCheck(this, RingIn);
+
+           if (!Array.isArray(geomRing) || geomRing.length === 0) {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           }
+
+           this.poly = poly;
+           this.isExterior = isExterior;
+           this.segments = [];
+
+           if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           }
+
+           var firstPoint = rounder.round(geomRing[0][0], geomRing[0][1]);
+           this.bbox = {
+             ll: {
+               x: firstPoint.x,
+               y: firstPoint.y
+             },
+             ur: {
+               x: firstPoint.x,
+               y: firstPoint.y
+             }
+           };
+           var prevPoint = firstPoint;
+
+           for (var i = 1, iMax = geomRing.length; i < iMax; i++) {
+             if (typeof geomRing[i][0] !== 'number' || typeof geomRing[i][1] !== 'number') {
+               throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+             }
+
+             var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
+
+             if (point.x === prevPoint.x && point.y === prevPoint.y) continue;
+             this.segments.push(Segment.fromRing(prevPoint, point, this));
+             if (point.x < this.bbox.ll.x) this.bbox.ll.x = point.x;
+             if (point.y < this.bbox.ll.y) this.bbox.ll.y = point.y;
+             if (point.x > this.bbox.ur.x) this.bbox.ur.x = point.x;
+             if (point.y > this.bbox.ur.y) this.bbox.ur.y = point.y;
+             prevPoint = point;
+           } // add segment from last to first if last is not the same as first
+
+
+           if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
+             this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));
+           }
+         }
+
+         _createClass(RingIn, [{
+           key: "getSweepEvents",
+           value: function getSweepEvents() {
+             var sweepEvents = [];
+
+             for (var i = 0, iMax = this.segments.length; i < iMax; i++) {
+               var segment = this.segments[i];
+               sweepEvents.push(segment.leftSE);
+               sweepEvents.push(segment.rightSE);
+             }
+
+             return sweepEvents;
+           }
+         }]);
+
+         return RingIn;
+       }();
+
+       var PolyIn = /*#__PURE__*/function () {
+         function PolyIn(geomPoly, multiPoly) {
+           _classCallCheck(this, PolyIn);
+
+           if (!Array.isArray(geomPoly)) {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           }
+
+           this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value
+
+           this.bbox = {
+             ll: {
+               x: this.exteriorRing.bbox.ll.x,
+               y: this.exteriorRing.bbox.ll.y
+             },
+             ur: {
+               x: this.exteriorRing.bbox.ur.x,
+               y: this.exteriorRing.bbox.ur.y
+             }
+           };
+           this.interiorRings = [];
+
+           for (var i = 1, iMax = geomPoly.length; i < iMax; i++) {
+             var ring = new RingIn(geomPoly[i], this, false);
+             if (ring.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = ring.bbox.ll.x;
+             if (ring.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = ring.bbox.ll.y;
+             if (ring.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = ring.bbox.ur.x;
+             if (ring.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = ring.bbox.ur.y;
+             this.interiorRings.push(ring);
+           }
+
+           this.multiPoly = multiPoly;
+         }
+
+         _createClass(PolyIn, [{
+           key: "getSweepEvents",
+           value: function getSweepEvents() {
+             var sweepEvents = this.exteriorRing.getSweepEvents();
+
+             for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+               var ringSweepEvents = this.interiorRings[i].getSweepEvents();
+
+               for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
+                 sweepEvents.push(ringSweepEvents[j]);
+               }
+             }
+
+             return sweepEvents;
+           }
+         }]);
+
+         return PolyIn;
+       }();
+
+       var MultiPolyIn = /*#__PURE__*/function () {
+         function MultiPolyIn(geom, isSubject) {
+           _classCallCheck(this, MultiPolyIn);
+
+           if (!Array.isArray(geom)) {
+             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           }
+
+           try {
+             // if the input looks like a polygon, convert it to a multipolygon
+             if (typeof geom[0][0][0] === 'number') geom = [geom];
+           } catch (ex) {// The input is either malformed or has empty arrays.
+             // In either case, it will be handled later on.
+           }
+
+           this.polys = [];
+           this.bbox = {
+             ll: {
+               x: Number.POSITIVE_INFINITY,
+               y: Number.POSITIVE_INFINITY
+             },
+             ur: {
+               x: Number.NEGATIVE_INFINITY,
+               y: Number.NEGATIVE_INFINITY
+             }
+           };
+
+           for (var i = 0, iMax = geom.length; i < iMax; i++) {
+             var poly = new PolyIn(geom[i], this);
+             if (poly.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = poly.bbox.ll.x;
+             if (poly.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = poly.bbox.ll.y;
+             if (poly.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = poly.bbox.ur.x;
+             if (poly.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = poly.bbox.ur.y;
+             this.polys.push(poly);
+           }
+
+           this.isSubject = isSubject;
+         }
+
+         _createClass(MultiPolyIn, [{
+           key: "getSweepEvents",
+           value: function getSweepEvents() {
+             var sweepEvents = [];
+
+             for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+               var polySweepEvents = this.polys[i].getSweepEvents();
+
+               for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
+                 sweepEvents.push(polySweepEvents[j]);
+               }
+             }
+
+             return sweepEvents;
+           }
+         }]);
+
+         return MultiPolyIn;
+       }();
+
+       var RingOut = /*#__PURE__*/function () {
+         _createClass(RingOut, null, [{
+           key: "factory",
+
+           /* Given the segments from the sweep line pass, compute & return a series
+            * of closed rings from all the segments marked to be part of the result */
+           value: function factory(allSegments) {
+             var ringsOut = [];
+
+             for (var i = 0, iMax = allSegments.length; i < iMax; i++) {
+               var segment = allSegments[i];
+               if (!segment.isInResult() || segment.ringOut) continue;
+               var prevEvent = null;
+               var event = segment.leftSE;
+               var nextEvent = segment.rightSE;
+               var events = [event];
+               var startingPoint = event.point;
+               var intersectionLEs = [];
+               /* Walk the chain of linked events to form a closed ring */
+
+               while (true) {
+                 prevEvent = event;
+                 event = nextEvent;
+                 events.push(event);
+                 /* Is the ring complete? */
+
+                 if (event.point === startingPoint) break;
+
+                 while (true) {
+                   var availableLEs = event.getAvailableLinkedEvents();
+                   /* Did we hit a dead end? This shouldn't happen. Indicates some earlier
+                    * part of the algorithm malfunctioned... please file a bug report. */
+
+                   if (availableLEs.length === 0) {
+                     var firstPt = events[0].point;
+                     var lastPt = events[events.length - 1].point;
+                     throw new Error("Unable to complete output ring starting at [".concat(firstPt.x, ",") + " ".concat(firstPt.y, "]. Last matching segment found ends at") + " [".concat(lastPt.x, ", ").concat(lastPt.y, "]."));
+                   }
+                   /* Only one way to go, so cotinue on the path */
+
+
+                   if (availableLEs.length === 1) {
+                     nextEvent = availableLEs[0].otherSE;
+                     break;
+                   }
+                   /* We must have an intersection. Check for a completed loop */
+
+
+                   var indexLE = null;
+
+                   for (var j = 0, jMax = intersectionLEs.length; j < jMax; j++) {
+                     if (intersectionLEs[j].point === event.point) {
+                       indexLE = j;
+                       break;
+                     }
+                   }
+                   /* Found a completed loop. Cut that off and make a ring */
+
+
+                   if (indexLE !== null) {
+                     var intersectionLE = intersectionLEs.splice(indexLE)[0];
+                     var ringEvents = events.splice(intersectionLE.index);
+                     ringEvents.unshift(ringEvents[0].otherSE);
+                     ringsOut.push(new RingOut(ringEvents.reverse()));
+                     continue;
+                   }
+                   /* register the intersection */
+
+
+                   intersectionLEs.push({
+                     index: events.length,
+                     point: event.point
+                   });
+                   /* Choose the left-most option to continue the walk */
+
+                   var comparator = event.getLeftmostComparator(prevEvent);
+                   nextEvent = availableLEs.sort(comparator)[0].otherSE;
+                   break;
+                 }
+               }
+
+               ringsOut.push(new RingOut(events));
+             }
+
+             return ringsOut;
+           }
+         }]);
+
+         function RingOut(events) {
+           _classCallCheck(this, RingOut);
+
+           this.events = events;
+
+           for (var i = 0, iMax = events.length; i < iMax; i++) {
+             events[i].segment.ringOut = this;
+           }
+
+           this.poly = null;
+         }
+
+         _createClass(RingOut, [{
+           key: "getGeom",
+           value: function getGeom() {
+             // Remove superfluous points (ie extra points along a straight line),
+             var prevPt = this.events[0].point;
+             var points = [prevPt];
+
+             for (var i = 1, iMax = this.events.length - 1; i < iMax; i++) {
+               var _pt = this.events[i].point;
+               var _nextPt = this.events[i + 1].point;
+               if (compareVectorAngles(_pt, prevPt, _nextPt) === 0) continue;
+               points.push(_pt);
+               prevPt = _pt;
+             } // ring was all (within rounding error of angle calc) colinear points
+
+
+             if (points.length === 1) return null; // check if the starting point is necessary
+
+             var pt = points[0];
+             var nextPt = points[1];
+             if (compareVectorAngles(pt, prevPt, nextPt) === 0) points.shift();
+             points.push(points[0]);
+             var step = this.isExteriorRing() ? 1 : -1;
+             var iStart = this.isExteriorRing() ? 0 : points.length - 1;
+             var iEnd = this.isExteriorRing() ? points.length : -1;
+             var orderedPoints = [];
+
+             for (var _i = iStart; _i != iEnd; _i += step) {
+               orderedPoints.push([points[_i].x, points[_i].y]);
+             }
+
+             return orderedPoints;
+           }
+         }, {
+           key: "isExteriorRing",
+           value: function isExteriorRing() {
+             if (this._isExteriorRing === undefined) {
+               var enclosing = this.enclosingRing();
+               this._isExteriorRing = enclosing ? !enclosing.isExteriorRing() : true;
+             }
+
+             return this._isExteriorRing;
+           }
+         }, {
+           key: "enclosingRing",
+           value: function enclosingRing() {
+             if (this._enclosingRing === undefined) {
+               this._enclosingRing = this._calcEnclosingRing();
+             }
+
+             return this._enclosingRing;
+           }
+           /* Returns the ring that encloses this one, if any */
+
+         }, {
+           key: "_calcEnclosingRing",
+           value: function _calcEnclosingRing() {
+             // start with the ealier sweep line event so that the prevSeg
+             // chain doesn't lead us inside of a loop of ours
+             var leftMostEvt = this.events[0];
+
+             for (var i = 1, iMax = this.events.length; i < iMax; i++) {
+               var evt = this.events[i];
+               if (SweepEvent.compare(leftMostEvt, evt) > 0) leftMostEvt = evt;
+             }
+
+             var prevSeg = leftMostEvt.segment.prevInResult();
+             var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+
+             while (true) {
+               // no segment found, thus no ring can enclose us
+               if (!prevSeg) return null; // no segments below prev segment found, thus the ring of the prev
+               // segment must loop back around and enclose us
+
+               if (!prevPrevSeg) return prevSeg.ringOut; // if the two segments are of different rings, the ring of the prev
+               // segment must either loop around us or the ring of the prev prev
+               // seg, which would make us and the ring of the prev peers
+
+               if (prevPrevSeg.ringOut !== prevSeg.ringOut) {
+                 if (prevPrevSeg.ringOut.enclosingRing() !== prevSeg.ringOut) {
+                   return prevSeg.ringOut;
+                 } else return prevSeg.ringOut.enclosingRing();
+               } // two segments are from the same ring, so this was a penisula
+               // of that ring. iterate downward, keep searching
+
+
+               prevSeg = prevPrevSeg.prevInResult();
+               prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+             }
+           }
+         }]);
+
+         return RingOut;
+       }();
+
+       var PolyOut = /*#__PURE__*/function () {
+         function PolyOut(exteriorRing) {
+           _classCallCheck(this, PolyOut);
+
+           this.exteriorRing = exteriorRing;
+           exteriorRing.poly = this;
+           this.interiorRings = [];
+         }
+
+         _createClass(PolyOut, [{
+           key: "addInterior",
+           value: function addInterior(ring) {
+             this.interiorRings.push(ring);
+             ring.poly = this;
+           }
+         }, {
+           key: "getGeom",
+           value: function getGeom() {
+             var geom = [this.exteriorRing.getGeom()]; // exterior ring was all (within rounding error of angle calc) colinear points
+
+             if (geom[0] === null) return null;
+
+             for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
+               var ringGeom = this.interiorRings[i].getGeom(); // interior ring was all (within rounding error of angle calc) colinear points
+
+               if (ringGeom === null) continue;
+               geom.push(ringGeom);
+             }
+
+             return geom;
+           }
+         }]);
+
+         return PolyOut;
+       }();
+
+       var MultiPolyOut = /*#__PURE__*/function () {
+         function MultiPolyOut(rings) {
+           _classCallCheck(this, MultiPolyOut);
+
+           this.rings = rings;
+           this.polys = this._composePolys(rings);
+         }
+
+         _createClass(MultiPolyOut, [{
+           key: "getGeom",
+           value: function getGeom() {
+             var geom = [];
+
+             for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
+               var polyGeom = this.polys[i].getGeom(); // exterior ring was all (within rounding error of angle calc) colinear points
+
+               if (polyGeom === null) continue;
+               geom.push(polyGeom);
+             }
+
+             return geom;
+           }
+         }, {
+           key: "_composePolys",
+           value: function _composePolys(rings) {
+             var polys = [];
+
+             for (var i = 0, iMax = rings.length; i < iMax; i++) {
+               var ring = rings[i];
+               if (ring.poly) continue;
+               if (ring.isExteriorRing()) polys.push(new PolyOut(ring));else {
+                 var enclosingRing = ring.enclosingRing();
+                 if (!enclosingRing.poly) polys.push(new PolyOut(enclosingRing));
+                 enclosingRing.poly.addInterior(ring);
+               }
+             }
+
+             return polys;
+           }
+         }]);
+
+         return MultiPolyOut;
+       }();
+       /**
+        * NOTE:  We must be careful not to change any segments while
+        *        they are in the SplayTree. AFAIK, there's no way to tell
+        *        the tree to rebalance itself - thus before splitting
+        *        a segment that's in the tree, we remove it from the tree,
+        *        do the split, then re-insert it. (Even though splitting a
+        *        segment *shouldn't* change its correct position in the
+        *        sweep line tree, the reality is because of rounding errors,
+        *        it sometimes does.)
+        */
+
+
+       var SweepLine = /*#__PURE__*/function () {
+         function SweepLine(queue) {
+           var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
+
+           _classCallCheck(this, SweepLine);
+
+           this.queue = queue;
+           this.tree = new Tree(comparator);
+           this.segments = [];
+         }
+
+         _createClass(SweepLine, [{
+           key: "process",
+           value: function process(event) {
+             var segment = event.segment;
+             var newEvents = []; // if we've already been consumed by another segment,
+             // clean up our body parts and get out
+
+             if (event.consumedBy) {
+               if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
+               return newEvents;
+             }
+
+             var node = event.isLeft ? this.tree.insert(segment) : this.tree.find(segment);
+             if (!node) throw new Error("Unable to find segment #".concat(segment.id, " ") + "[".concat(segment.leftSE.point.x, ", ").concat(segment.leftSE.point.y, "] -> ") + "[".concat(segment.rightSE.point.x, ", ").concat(segment.rightSE.point.y, "] ") + 'in SweepLine tree. Please submit a bug report.');
+             var prevNode = node;
+             var nextNode = node;
+             var prevSeg = undefined;
+             var nextSeg = undefined; // skip consumed segments still in tree
+
+             while (prevSeg === undefined) {
+               prevNode = this.tree.prev(prevNode);
+               if (prevNode === null) prevSeg = null;else if (prevNode.key.consumedBy === undefined) prevSeg = prevNode.key;
+             } // skip consumed segments still in tree
+
+
+             while (nextSeg === undefined) {
+               nextNode = this.tree.next(nextNode);
+               if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
+             }
+
+             if (event.isLeft) {
+               // Check for intersections against the previous segment in the sweep line
+               var prevMySplitter = null;
+
+               if (prevSeg) {
+                 var prevInter = prevSeg.getIntersection(segment);
+
+                 if (prevInter !== null) {
+                   if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
+
+                   if (!prevSeg.isAnEndpoint(prevInter)) {
+                     var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
+
+                     for (var i = 0, iMax = newEventsFromSplit.length; i < iMax; i++) {
+                       newEvents.push(newEventsFromSplit[i]);
+                     }
+                   }
+                 }
+               } // Check for intersections against the next segment in the sweep line
+
+
+               var nextMySplitter = null;
+
+               if (nextSeg) {
+                 var nextInter = nextSeg.getIntersection(segment);
+
+                 if (nextInter !== null) {
+                   if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;
+
+                   if (!nextSeg.isAnEndpoint(nextInter)) {
+                     var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);
+
+                     for (var _i = 0, _iMax = _newEventsFromSplit.length; _i < _iMax; _i++) {
+                       newEvents.push(_newEventsFromSplit[_i]);
+                     }
+                   }
+                 }
+               } // For simplicity, even if we find more than one intersection we only
+               // spilt on the 'earliest' (sweep-line style) of the intersections.
+               // The other intersection will be handled in a future process().
+
+
+               if (prevMySplitter !== null || nextMySplitter !== null) {
+                 var mySplitter = null;
+                 if (prevMySplitter === null) mySplitter = nextMySplitter;else if (nextMySplitter === null) mySplitter = prevMySplitter;else {
+                   var cmpSplitters = SweepEvent.comparePoints(prevMySplitter, nextMySplitter);
+                   mySplitter = cmpSplitters <= 0 ? prevMySplitter : nextMySplitter;
+                 } // Rounding errors can cause changes in ordering,
+                 // so remove afected segments and right sweep events before splitting
+
+                 this.queue.remove(segment.rightSE);
+                 newEvents.push(segment.rightSE);
+
+                 var _newEventsFromSplit2 = segment.split(mySplitter);
+
+                 for (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
+                   newEvents.push(_newEventsFromSplit2[_i2]);
+                 }
+               }
+
+               if (newEvents.length > 0) {
+                 // We found some intersections, so re-do the current event to
+                 // make sure sweep line ordering is totally consistent for later
+                 // use with the segment 'prev' pointers
+                 this.tree.remove(segment);
+                 newEvents.push(event);
+               } else {
+                 // done with left event
+                 this.segments.push(segment);
+                 segment.prev = prevSeg;
+               }
+             } else {
+               // event.isRight
+               // since we're about to be removed from the sweep line, check for
+               // intersections between our previous and next segments
+               if (prevSeg && nextSeg) {
+                 var inter = prevSeg.getIntersection(nextSeg);
+
+                 if (inter !== null) {
+                   if (!prevSeg.isAnEndpoint(inter)) {
+                     var _newEventsFromSplit3 = this._splitSafely(prevSeg, inter);
+
+                     for (var _i3 = 0, _iMax3 = _newEventsFromSplit3.length; _i3 < _iMax3; _i3++) {
+                       newEvents.push(_newEventsFromSplit3[_i3]);
+                     }
+                   }
+
+                   if (!nextSeg.isAnEndpoint(inter)) {
+                     var _newEventsFromSplit4 = this._splitSafely(nextSeg, inter);
+
+                     for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
+                       newEvents.push(_newEventsFromSplit4[_i4]);
+                     }
+                   }
+                 }
+               }
+
+               this.tree.remove(segment);
+             }
+
+             return newEvents;
+           }
+           /* Safely split a segment that is currently in the datastructures
+            * IE - a segment other than the one that is currently being processed. */
+
+         }, {
+           key: "_splitSafely",
+           value: function _splitSafely(seg, pt) {
+             // Rounding errors can cause changes in ordering,
+             // so remove afected segments and right sweep events before splitting
+             // removeNode() doesn't work, so have re-find the seg
+             // https://github.com/w8r/splay-tree/pull/5
+             this.tree.remove(seg);
+             var rightSE = seg.rightSE;
+             this.queue.remove(rightSE);
+             var newEvents = seg.split(pt);
+             newEvents.push(rightSE); // splitting can trigger consumption
+
+             if (seg.consumedBy === undefined) this.tree.insert(seg);
+             return newEvents;
+           }
+         }]);
+
+         return SweepLine;
+       }();
+
+       var POLYGON_CLIPPING_MAX_QUEUE_SIZE = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_QUEUE_SIZE || 1000000;
+       var POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS || 1000000;
+
+       var Operation = /*#__PURE__*/function () {
+         function Operation() {
+           _classCallCheck(this, Operation);
+         }
+
+         _createClass(Operation, [{
+           key: "run",
+           value: function run(type, geom, moreGeoms) {
+             operation.type = type;
+             rounder.reset();
+             /* Convert inputs to MultiPoly objects */
+
+             var multipolys = [new MultiPolyIn(geom, true)];
+
+             for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
+               multipolys.push(new MultiPolyIn(moreGeoms[i], false));
+             }
+
+             operation.numMultiPolys = multipolys.length;
+             /* BBox optimization for difference operation
+              * If the bbox of a multipolygon that's part of the clipping doesn't
+              * intersect the bbox of the subject at all, we can just drop that
+              * multiploygon. */
+
+             if (operation.type === 'difference') {
+               // in place removal
+               var subject = multipolys[0];
+               var _i = 1;
+
+               while (_i < multipolys.length) {
+                 if (getBboxOverlap(multipolys[_i].bbox, subject.bbox) !== null) _i++;else multipolys.splice(_i, 1);
+               }
+             }
+             /* BBox optimization for intersection operation
+              * If we can find any pair of multipolygons whose bbox does not overlap,
+              * then the result will be empty. */
+
+
+             if (operation.type === 'intersection') {
+               // TODO: this is O(n^2) in number of polygons. By sorting the bboxes,
+               //       it could be optimized to O(n * ln(n))
+               for (var _i2 = 0, _iMax = multipolys.length; _i2 < _iMax; _i2++) {
+                 var mpA = multipolys[_i2];
+
+                 for (var j = _i2 + 1, jMax = multipolys.length; j < jMax; j++) {
+                   if (getBboxOverlap(mpA.bbox, multipolys[j].bbox) === null) return [];
+                 }
+               }
+             }
+             /* Put segment endpoints in a priority queue */
+
+
+             var queue = new Tree(SweepEvent.compare);
+
+             for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
+               var sweepEvents = multipolys[_i3].getSweepEvents();
+
+               for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
+                 queue.insert(sweepEvents[_j]);
+
+                 if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+                   // prevents an infinite loop, an otherwise common manifestation of bugs
+                   throw new Error('Infinite loop when putting segment endpoints in a priority queue ' + '(queue size too big). Please file a bug report.');
+                 }
+               }
+             }
+             /* Pass the sweep line over those endpoints */
+
+
+             var sweepLine = new SweepLine(queue);
+             var prevQueueSize = queue.size;
+             var node = queue.pop();
+
+             while (node) {
+               var evt = node.key;
+
+               if (queue.size === prevQueueSize) {
+                 // prevents an infinite loop, an otherwise common manifestation of bugs
+                 var seg = evt.segment;
+                 throw new Error("Unable to pop() ".concat(evt.isLeft ? 'left' : 'right', " SweepEvent ") + "[".concat(evt.point.x, ", ").concat(evt.point.y, "] from segment #").concat(seg.id, " ") + "[".concat(seg.leftSE.point.x, ", ").concat(seg.leftSE.point.y, "] -> ") + "[".concat(seg.rightSE.point.x, ", ").concat(seg.rightSE.point.y, "] from queue. ") + 'Please file a bug report.');
+               }
+
+               if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
+                 // prevents an infinite loop, an otherwise common manifestation of bugs
+                 throw new Error('Infinite loop when passing sweep line over endpoints ' + '(queue size too big). Please file a bug report.');
+               }
+
+               if (sweepLine.segments.length > POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS) {
+                 // prevents an infinite loop, an otherwise common manifestation of bugs
+                 throw new Error('Infinite loop when passing sweep line over endpoints ' + '(too many sweep line segments). Please file a bug report.');
+               }
+
+               var newEvents = sweepLine.process(evt);
+
+               for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
+                 var _evt = newEvents[_i4];
+                 if (_evt.consumedBy === undefined) queue.insert(_evt);
+               }
+
+               prevQueueSize = queue.size;
+               node = queue.pop();
+             } // free some memory we don't need anymore
+
+
+             rounder.reset();
+             /* Collect and compile segments we're keeping into a multipolygon */
+
+             var ringsOut = RingOut.factory(sweepLine.segments);
+             var result = new MultiPolyOut(ringsOut);
+             return result.getGeom();
+           }
+         }]);
+
+         return Operation;
+       }(); // singleton available by import
+
+
+       var operation = new Operation();
+
+       var union = function union(geom) {
+         for (var _len = arguments.length, moreGeoms = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
+           moreGeoms[_key - 1] = arguments[_key];
+         }
+
+         return operation.run('union', geom, moreGeoms);
+       };
+
+       var intersection$1 = function intersection(geom) {
+         for (var _len2 = arguments.length, moreGeoms = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
+           moreGeoms[_key2 - 1] = arguments[_key2];
+         }
+
+         return operation.run('intersection', geom, moreGeoms);
+       };
+
+       var xor = function xor(geom) {
+         for (var _len3 = arguments.length, moreGeoms = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
+           moreGeoms[_key3 - 1] = arguments[_key3];
+         }
+
+         return operation.run('xor', geom, moreGeoms);
+       };
+
+       var difference = function difference(subjectGeom) {
+         for (var _len4 = arguments.length, clippingGeoms = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
+           clippingGeoms[_key4 - 1] = arguments[_key4];
+         }
+
+         return operation.run('difference', subjectGeom, clippingGeoms);
+       };
+
+       var index = {
+         union: union,
+         intersection: intersection$1,
+         xor: xor,
+         difference: difference
+       };
+
+       var geojsonPrecision = {exports: {}};
+
+       (function () {
+         function parse(t, coordinatePrecision, extrasPrecision) {
+           function point(p) {
+             return p.map(function (e, index) {
+               if (index < 2) {
+                 return 1 * e.toFixed(coordinatePrecision);
+               } else {
+                 return 1 * e.toFixed(extrasPrecision);
+               }
+             });
+           }
+
+           function multi(l) {
+             return l.map(point);
+           }
+
+           function poly(p) {
+             return p.map(multi);
+           }
+
+           function multiPoly(m) {
+             return m.map(poly);
+           }
+
+           function geometry(obj) {
+             if (!obj) {
+               return {};
+             }
+
+             switch (obj.type) {
+               case "Point":
+                 obj.coordinates = point(obj.coordinates);
+                 return obj;
+
+               case "LineString":
+               case "MultiPoint":
+                 obj.coordinates = multi(obj.coordinates);
+                 return obj;
+
+               case "Polygon":
+               case "MultiLineString":
+                 obj.coordinates = poly(obj.coordinates);
+                 return obj;
+
+               case "MultiPolygon":
+                 obj.coordinates = multiPoly(obj.coordinates);
+                 return obj;
+
+               case "GeometryCollection":
+                 obj.geometries = obj.geometries.map(geometry);
+                 return obj;
+
+               default:
+                 return {};
+             }
+           }
+
+           function feature(obj) {
+             obj.geometry = geometry(obj.geometry);
+             return obj;
+           }
+
+           function featureCollection(f) {
+             f.features = f.features.map(feature);
+             return f;
+           }
+
+           function geometryCollection(g) {
+             g.geometries = g.geometries.map(geometry);
+             return g;
+           }
+
+           if (!t) {
+             return t;
+           }
+
+           switch (t.type) {
+             case "Feature":
+               return feature(t);
+
+             case "GeometryCollection":
+               return geometryCollection(t);
+
+             case "FeatureCollection":
+               return featureCollection(t);
+
+             case "Point":
+             case "LineString":
+             case "Polygon":
+             case "MultiPoint":
+             case "MultiPolygon":
+             case "MultiLineString":
+               return geometry(t);
+
+             default:
+               return t;
+           }
+         }
+
+         geojsonPrecision.exports = parse;
+         geojsonPrecision.exports.parse = parse;
+       })();
+
+       var precision = geojsonPrecision.exports;
+
+       var $$k = _export;
+       var fails$5 = fails$S;
+       var toObject$1 = toObject$j;
+       var toPrimitive = toPrimitive$3;
+
+       var FORCED$5 = fails$5(function () {
+         return new Date(NaN).toJSON() !== null
+           || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
+       });
+
+       // `Date.prototype.toJSON` method
+       // https://tc39.es/ecma262/#sec-date.prototype.tojson
+       $$k({ target: 'Date', proto: true, forced: FORCED$5 }, {
+         // eslint-disable-next-line no-unused-vars -- required for `.length`
+         toJSON: function toJSON(key) {
+           var O = toObject$1(this);
+           var pv = toPrimitive(O, 'number');
+           return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+         }
+       });
+
+       var $$j = _export;
+       var call$1 = functionCall;
+
+       // `URL.prototype.toJSON` method
+       // https://url.spec.whatwg.org/#dom-url-tojson
+       $$j({ target: 'URL', proto: true, enumerable: true }, {
+         toJSON: function toJSON() {
+           return call$1(URL.prototype.toString, this);
+         }
+       });
+
+       function isObject$3(obj) {
+         return _typeof(obj) === 'object' && obj !== null;
+       }
+
+       function forEach(obj, cb) {
+         if (Array.isArray(obj)) {
+           obj.forEach(cb);
+         } else if (isObject$3(obj)) {
+           Object.keys(obj).forEach(function (key) {
+             var val = obj[key];
+             cb(val, key);
+           });
+         }
+       }
+
+       function getTreeDepth(obj) {
+         var depth = 0;
+
+         if (Array.isArray(obj) || isObject$3(obj)) {
+           forEach(obj, function (val) {
+             if (Array.isArray(val) || isObject$3(val)) {
+               var tmpDepth = getTreeDepth(val);
+
+               if (tmpDepth > depth) {
+                 depth = tmpDepth;
+               }
+             }
+           });
+           return depth + 1;
+         }
+
+         return depth;
+       }
+
+       function stringify(obj, options) {
+         options = options || {};
+         var indent = JSON.stringify([1], null, get(options, 'indent', 2)).slice(2, -3);
+         var addMargin = get(options, 'margins', false);
+         var addArrayMargin = get(options, 'arrayMargins', false);
+         var addObjectMargin = get(options, 'objectMargins', false);
+         var maxLength = indent === '' ? Infinity : get(options, 'maxLength', 80);
+         var maxNesting = get(options, 'maxNesting', Infinity);
+         return function _stringify(obj, currentIndent, reserved) {
+           if (obj && typeof obj.toJSON === 'function') {
+             obj = obj.toJSON();
+           }
+
+           var string = JSON.stringify(obj);
+
+           if (string === undefined) {
+             return string;
+           }
+
+           var length = maxLength - currentIndent.length - reserved;
+           var treeDepth = getTreeDepth(obj);
+
+           if (treeDepth <= maxNesting && string.length <= length) {
+             var prettified = prettify(string, {
+               addMargin: addMargin,
+               addArrayMargin: addArrayMargin,
+               addObjectMargin: addObjectMargin
+             });
+
+             if (prettified.length <= length) {
+               return prettified;
+             }
+           }
+
+           if (isObject$3(obj)) {
+             var nextIndent = currentIndent + indent;
+             var items = [];
+             var delimiters;
+
+             var comma = function comma(array, index) {
+               return index === array.length - 1 ? 0 : 1;
+             };
+
+             if (Array.isArray(obj)) {
+               for (var index = 0; index < obj.length; index++) {
+                 items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
+               }
+
+               delimiters = '[]';
+             } else {
+               Object.keys(obj).forEach(function (key, index, array) {
+                 var keyPart = JSON.stringify(key) + ': ';
+
+                 var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));
+
+                 if (value !== undefined) {
+                   items.push(keyPart + value);
+                 }
+               });
+               delimiters = '{}';
+             }
+
+             if (items.length > 0) {
+               return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
+             }
+           }
+
+           return string;
+         }(obj, '', 0);
+       } // Note: This regex matches even invalid JSON strings, but since we’re
+       // working on the output of `JSON.stringify` we know that only valid strings
+       // are present (unless the user supplied a weird `options.indent` but in
+       // that case we don’t care since the output would be invalid anyway).
+
+
+       var stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;
+
+       function prettify(string, options) {
+         options = options || {};
+         var tokens = {
+           '{': '{',
+           '}': '}',
+           '[': '[',
+           ']': ']',
+           ',': ', ',
+           ':': ': '
+         };
+
+         if (options.addMargin || options.addObjectMargin) {
+           tokens['{'] = '{ ';
+           tokens['}'] = ' }';
+         }
+
+         if (options.addMargin || options.addArrayMargin) {
+           tokens['['] = '[ ';
+           tokens[']'] = ' ]';
+         }
+
+         return string.replace(stringOrChar, function (match, string) {
+           return string ? match : tokens[match];
+         });
+       }
+
+       function get(options, name, defaultValue) {
+         return name in options ? options[name] : defaultValue;
+       }
+
+       var jsonStringifyPrettyCompact = stringify;
+
+       var _default = /*#__PURE__*/function () {
+         // constructor
+         //
+         // `fc`  Optional FeatureCollection of known features
+         //
+         // Optionally pass a GeoJSON FeatureCollection of known features which we can refer to later.
+         // Each feature must have a filename-like `id`, for example: `something.geojson`
+         //
+         // {
+         //   "type": "FeatureCollection"
+         //   "features": [
+         //     {
+         //       "type": "Feature",
+         //       "id": "philly_metro.geojson",
+         //       "properties": { … },
+         //       "geometry": { … }
+         //     }
+         //   ]
+         // }
+         function _default(fc) {
+           var _this = this;
+
+           _classCallCheck$1(this, _default);
+
+           // The _cache retains resolved features, so if you ask for the same thing multiple times
+           // we don't repeat the expensive resolving/clipping operations.
+           //
+           // Each feature has a stable identifier that is used as the cache key.
+           // The identifiers look like:
+           // - for point locations, the stringified point:          e.g. '[8.67039,49.41882]'
+           // - for geojson locations, the geojson id:               e.g. 'de-hamburg.geojson'
+           // - for countrycoder locations, feature.id property:     e.g. 'Q2'  (countrycoder uses Wikidata identifiers)
+           // - for aggregated locationSets, +[include]-[exclude]:   e.g '+[Q2]-[Q18,Q27611]'
+           this._cache = {}; // When strict mode = true, throw on invalid locations or locationSets.
+           // When strict mode = false, return `null` for invalid locations or locationSets.
+
+           this._strict = true; // process input FeatureCollection
+
+           if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+             fc.features.forEach(function (feature) {
+               feature.properties = feature.properties || {};
+               var props = feature.properties; // Get `id` from either `id` or `properties`
+
+               var id = feature.id || props.id;
+               if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase
+
+               id = id.toLowerCase();
+               feature.id = id;
+               props.id = id; // Ensure `area` property exists
+
+               if (!props.area) {
+                 var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
+
+                 props.area = Number(area.toFixed(2));
+               }
+
+               _this._cache[id] = feature;
+             });
+           } // Replace CountryCoder world geometry to be a polygon covering the world.
+
+
+           var world = _cloneDeep(feature$1('Q2'));
+
+           world.geometry = {
+             type: 'Polygon',
+             coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
+           };
+           world.id = 'Q2';
+           world.properties.id = 'Q2';
+           world.properties.area = geojsonArea.geometry(world.geometry) / 1e6; // m² to km²
+
+           this._cache.Q2 = world;
+         } // validateLocation
+         // `location`  The location to validate
+         //
+         // Pass a `location` value to validate
+         //
+         // Returns a result like:
+         //   {
+         //     type:     'point', 'geojson', or 'countrycoder'
+         //     location:  the queried location
+         //     id:        the stable identifier for the feature
+         //   }
+         // or `null` if the location is invalid
+         //
+
+
+         _createClass$1(_default, [{
+           key: "validateLocation",
+           value: function validateLocation(location) {
+             if (Array.isArray(location) && (location.length === 2 || location.length === 3)) {
+               // [lon, lat] or [lon, lat, radius] point?
+               var lon = location[0];
+               var lat = location[1];
+               var radius = location[2];
+
+               if (Number.isFinite(lon) && lon >= -180 && lon <= 180 && Number.isFinite(lat) && lat >= -90 && lat <= 90 && (location.length === 2 || Number.isFinite(radius) && radius > 0)) {
+                 var id = '[' + location.toString() + ']';
+                 return {
+                   type: 'point',
+                   location: location,
+                   id: id
+                 };
+               }
+             } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) {
+               // a .geojson filename?
+               var _id = location.toLowerCase();
+
+               if (this._cache[_id]) {
+                 return {
+                   type: 'geojson',
+                   location: location,
+                   id: _id
+                 };
+               }
+             } else if (typeof location === 'string' || typeof location === 'number') {
+               // a country-coder value?
+               var feature = feature$1(location);
+
+               if (feature) {
+                 // Use wikidata QID as the identifier, since that seems to be the one
+                 // property that everything in CountryCoder is guaranteed to have.
+                 var _id2 = feature.properties.wikidata;
+                 return {
+                   type: 'countrycoder',
+                   location: location,
+                   id: _id2
+                 };
+               }
+             }
+
+             if (this._strict) {
+               throw new Error("validateLocation:  Invalid location: \"".concat(location, "\"."));
+             } else {
+               return null;
+             }
+           } // resolveLocation
+           // `location`  The location to resolve
+           //
+           // Pass a `location` value to resolve
+           //
+           // Returns a result like:
+           //   {
+           //     type:      'point', 'geojson', or 'countrycoder'
+           //     location:  the queried location
+           //     id:        a stable identifier for the feature
+           //     feature:   the resolved GeoJSON feature
+           //   }
+           //  or `null` if the location is invalid
+           //
+
+         }, {
+           key: "resolveLocation",
+           value: function resolveLocation(location) {
+             var valid = this.validateLocation(location);
+             if (!valid) return null;
+             var id = valid.id; // Return a result from cache if we can
+
+             if (this._cache[id]) {
+               return Object.assign(valid, {
+                 feature: this._cache[id]
+               });
+             } // A [lon,lat] coordinate pair?
+
+
+             if (valid.type === 'point') {
+               var lon = location[0];
+               var lat = location[1];
+               var radius = location[2] || 25; // km
+
+               var EDGES = 10;
+               var PRECISION = 3;
+               var area = Math.PI * radius * radius;
+               var feature = this._cache[id] = precision({
+                 type: 'Feature',
+                 id: id,
+                 properties: {
+                   id: id,
+                   area: Number(area.toFixed(2))
+                 },
+                 geometry: circleToPolygon([lon, lat], radius * 1000, EDGES) // km to m
+
+               }, PRECISION);
+               return Object.assign(valid, {
+                 feature: feature
+               }); // A .geojson filename?
+             } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
+               var _feature = _cloneDeep(feature$1(id));
+
+               var props = _feature.properties; // -> This block of code is weird and requires some explanation. <-
+               // CountryCoder includes higher level features which are made up of members.
+               // These features don't have their own geometry, but CountryCoder provides an
+               //   `aggregateFeature` method to combine these members into a MultiPolygon.
+               // In the past, Turf/JSTS/martinez could not handle the aggregated features,
+               //   so we'd iteratively union them all together.  (this was slow)
+               // But now mfogel/polygon-clipping handles these MultiPolygons like a boss.
+               // This approach also has the benefit of removing all the internal boaders and
+               //   simplifying the regional polygons a lot.
+
+               if (Array.isArray(props.members)) {
+                 var aggregate = aggregateFeature(id);
+                 aggregate.geometry.coordinates = _clip([aggregate], 'UNION').geometry.coordinates;
+                 _feature.geometry = aggregate.geometry;
+               } // Ensure `area` property exists
+
+
+               if (!props.area) {
+                 var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
+
+
+                 props.area = Number(_area.toFixed(2));
+               } // Ensure `id` property exists
+
+
+               _feature.id = id;
+               props.id = id;
+               this._cache[id] = _feature;
+               return Object.assign(valid, {
+                 feature: _feature
+               });
+             }
+
+             if (this._strict) {
+               throw new Error("resolveLocation:  Couldn't resolve location \"".concat(location, "\"."));
+             } else {
+               return null;
+             }
+           } // validateLocationSet
+           // `locationSet`  the locationSet to validate
+           //
+           // Pass a locationSet Object to validate like:
+           //   {
+           //     include: [ Array of locations ],
+           //     exclude: [ Array of locations ]
+           //   }
+           //
+           // Returns a result like:
+           //   {
+           //     type:         'locationset'
+           //     locationSet:  the queried locationSet
+           //     id:           the stable identifier for the feature
+           //   }
+           // or `null` if the locationSet is invalid
+           //
+
+         }, {
+           key: "validateLocationSet",
+           value: function validateLocationSet(locationSet) {
+             locationSet = locationSet || {};
+             var validator = this.validateLocation.bind(this);
+             var include = (locationSet.include || []).map(validator).filter(Boolean);
+             var exclude = (locationSet.exclude || []).map(validator).filter(Boolean);
+
+             if (!include.length) {
+               if (this._strict) {
+                 throw new Error("validateLocationSet:  LocationSet includes nothing.");
+               } else {
+                 // non-strict mode, replace an empty locationSet with one that includes "the world"
+                 locationSet.include = ['Q2'];
+                 include = [{
+                   type: 'countrycoder',
+                   location: 'Q2',
+                   id: 'Q2'
+                 }];
+               }
+             } // Generate stable identifier
+
+
+             include.sort(_sortLocations);
+             var id = '+[' + include.map(function (d) {
+               return d.id;
+             }).join(',') + ']';
+
+             if (exclude.length) {
+               exclude.sort(_sortLocations);
+               id += '-[' + exclude.map(function (d) {
+                 return d.id;
+               }).join(',') + ']';
+             }
+
+             return {
+               type: 'locationset',
+               locationSet: locationSet,
+               id: id
+             };
+           } // resolveLocationSet
+           // `locationSet`  the locationSet to resolve
+           //
+           // Pass a locationSet Object to validate like:
+           //   {
+           //     include: [ Array of locations ],
+           //     exclude: [ Array of locations ]
+           //   }
+           //
+           // Returns a result like:
+           //   {
+           //     type:         'locationset'
+           //     locationSet:  the queried locationSet
+           //     id:           the stable identifier for the feature
+           //     feature:      the resolved GeoJSON feature
+           //   }
+           // or `null` if the locationSet is invalid
+           //
+
+         }, {
+           key: "resolveLocationSet",
+           value: function resolveLocationSet(locationSet) {
+             locationSet = locationSet || {};
+             var valid = this.validateLocationSet(locationSet);
+             if (!valid) return null;
+             var id = valid.id; // Return a result from cache if we can
+
+             if (this._cache[id]) {
+               return Object.assign(valid, {
+                 feature: this._cache[id]
+               });
+             }
+
+             var resolver = this.resolveLocation.bind(this);
+             var includes = (locationSet.include || []).map(resolver).filter(Boolean);
+             var excludes = (locationSet.exclude || []).map(resolver).filter(Boolean); // Return quickly if it's a single included location..
+
+             if (includes.length === 1 && excludes.length === 0) {
+               return Object.assign(valid, {
+                 feature: includes[0].feature
+               });
+             } // Calculate unions
+
+
+             var includeGeoJSON = _clip(includes.map(function (d) {
+               return d.feature;
+             }), 'UNION');
+
+             var excludeGeoJSON = _clip(excludes.map(function (d) {
+               return d.feature;
+             }), 'UNION'); // Calculate difference, update `area` and return result
+
+
+             var resultGeoJSON = excludeGeoJSON ? _clip([includeGeoJSON, excludeGeoJSON], 'DIFFERENCE') : includeGeoJSON;
+             var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
+
+             resultGeoJSON.id = id;
+             resultGeoJSON.properties = {
+               id: id,
+               area: Number(area.toFixed(2))
+             };
+             this._cache[id] = resultGeoJSON;
+             return Object.assign(valid, {
+               feature: resultGeoJSON
+             });
+           } // strict
+           //
+
+         }, {
+           key: "strict",
+           value: function strict(val) {
+             if (val === undefined) {
+               // get
+               return this._strict;
+             } else {
+               // set
+               this._strict = val;
+               return this;
+             }
+           } // cache
+           // convenience method to access the internal cache
+
+         }, {
+           key: "cache",
+           value: function cache() {
+             return this._cache;
+           } // stringify
+           // convenience method to prettyStringify the given object
+
+         }, {
+           key: "stringify",
+           value: function stringify(obj, options) {
+             return jsonStringifyPrettyCompact(obj, options);
+           }
+         }]);
+
+         return _default;
+       }(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
+
+       function _clip(features, which) {
+         if (!Array.isArray(features) || !features.length) return null;
+         var fn = {
+           UNION: index.union,
+           DIFFERENCE: index.difference
+         }[which];
+         var args = features.map(function (feature) {
+           return feature.geometry.coordinates;
+         });
+         var coords = fn.apply(null, args);
+         return {
+           type: 'Feature',
+           properties: {},
+           geometry: {
+             type: whichType(coords),
+             coordinates: coords
+           }
+         }; // is this a Polygon or a MultiPolygon?
+
+         function whichType(coords) {
+           var a = Array.isArray(coords);
+           var b = a && Array.isArray(coords[0]);
+           var c = b && Array.isArray(coords[0][0]);
+           var d = c && Array.isArray(coords[0][0][0]);
+           return d ? 'MultiPolygon' : 'Polygon';
+         }
+       }
+
+       function _cloneDeep(obj) {
+         return JSON.parse(JSON.stringify(obj));
+       } // Sorting the location lists is ok because they end up unioned together.
+       // This sorting makes it possible to generate a deterministic id.
+
+
+       function _sortLocations(a, b) {
+         var rank = {
+           countrycoder: 1,
+           geojson: 2,
+           point: 3
+         };
+         var aRank = rank[a.type];
+         var bRank = rank[b.type];
+         return aRank > bRank ? 1 : aRank < bRank ? -1 : a.id.localeCompare(b.id);
+       }
+
+       var $$i = _export;
+
+       // `Number.MAX_SAFE_INTEGER` constant
+       // https://tc39.es/ecma262/#sec-number.max_safe_integer
+       $$i({ target: 'Number', stat: true }, {
+         MAX_SAFE_INTEGER: 0x1FFFFFFFFFFFFF
+       });
+
+       var aesJs = {exports: {}};
+
+       (function (module, exports) {
+         (function (root) {
+
+           function checkInt(value) {
+             return parseInt(value) === value;
+           }
+
+           function checkInts(arrayish) {
+             if (!checkInt(arrayish.length)) {
+               return false;
+             }
+
+             for (var i = 0; i < arrayish.length; i++) {
+               if (!checkInt(arrayish[i]) || arrayish[i] < 0 || arrayish[i] > 255) {
+                 return false;
+               }
+             }
+
+             return true;
+           }
+
+           function coerceArray(arg, copy) {
+             // ArrayBuffer view
+             if (arg.buffer && arg.name === 'Uint8Array') {
+               if (copy) {
+                 if (arg.slice) {
+                   arg = arg.slice();
+                 } else {
+                   arg = Array.prototype.slice.call(arg);
+                 }
+               }
+
+               return arg;
+             } // It's an array; check it is a valid representation of a byte
+
+
+             if (Array.isArray(arg)) {
+               if (!checkInts(arg)) {
+                 throw new Error('Array contains invalid value: ' + arg);
+               }
+
+               return new Uint8Array(arg);
+             } // Something else, but behaves like an array (maybe a Buffer? Arguments?)
+
+
+             if (checkInt(arg.length) && checkInts(arg)) {
+               return new Uint8Array(arg);
+             }
+
+             throw new Error('unsupported array-like object');
+           }
+
+           function createArray(length) {
+             return new Uint8Array(length);
+           }
+
+           function copyArray(sourceArray, targetArray, targetStart, sourceStart, sourceEnd) {
+             if (sourceStart != null || sourceEnd != null) {
+               if (sourceArray.slice) {
+                 sourceArray = sourceArray.slice(sourceStart, sourceEnd);
+               } else {
+                 sourceArray = Array.prototype.slice.call(sourceArray, sourceStart, sourceEnd);
+               }
+             }
+
+             targetArray.set(sourceArray, targetStart);
+           }
+
+           var convertUtf8 = function () {
+             function toBytes(text) {
+               var result = [],
+                   i = 0;
+               text = encodeURI(text);
+
+               while (i < text.length) {
+                 var c = text.charCodeAt(i++); // if it is a % sign, encode the following 2 bytes as a hex value
+
+                 if (c === 37) {
+                   result.push(parseInt(text.substr(i, 2), 16));
+                   i += 2; // otherwise, just the actual byte
+                 } else {
+                   result.push(c);
+                 }
+               }
+
+               return coerceArray(result);
+             }
+
+             function fromBytes(bytes) {
+               var result = [],
+                   i = 0;
+
+               while (i < bytes.length) {
+                 var c = bytes[i];
+
+                 if (c < 128) {
+                   result.push(String.fromCharCode(c));
+                   i++;
+                 } else if (c > 191 && c < 224) {
+                   result.push(String.fromCharCode((c & 0x1f) << 6 | bytes[i + 1] & 0x3f));
+                   i += 2;
+                 } else {
+                   result.push(String.fromCharCode((c & 0x0f) << 12 | (bytes[i + 1] & 0x3f) << 6 | bytes[i + 2] & 0x3f));
+                   i += 3;
+                 }
+               }
+
+               return result.join('');
+             }
+
+             return {
+               toBytes: toBytes,
+               fromBytes: fromBytes
+             };
+           }();
+
+           var convertHex = function () {
+             function toBytes(text) {
+               var result = [];
+
+               for (var i = 0; i < text.length; i += 2) {
+                 result.push(parseInt(text.substr(i, 2), 16));
+               }
+
+               return result;
+             } // http://ixti.net/development/javascript/2011/11/11/base64-encodedecode-of-utf8-in-browser-with-js.html
+
+
+             var Hex = '0123456789abcdef';
+
+             function fromBytes(bytes) {
+               var result = [];
+
+               for (var i = 0; i < bytes.length; i++) {
+                 var v = bytes[i];
+                 result.push(Hex[(v & 0xf0) >> 4] + Hex[v & 0x0f]);
+               }
+
+               return result.join('');
+             }
+
+             return {
+               toBytes: toBytes,
+               fromBytes: fromBytes
+             };
+           }(); // Number of rounds by keysize
+
+
+           var numberOfRounds = {
+             16: 10,
+             24: 12,
+             32: 14
+           }; // Round constant words
+
+           var rcon = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80, 0x1b, 0x36, 0x6c, 0xd8, 0xab, 0x4d, 0x9a, 0x2f, 0x5e, 0xbc, 0x63, 0xc6, 0x97, 0x35, 0x6a, 0xd4, 0xb3, 0x7d, 0xfa, 0xef, 0xc5, 0x91]; // S-box and Inverse S-box (S is for Substitution)
+
+           var S = [0x63, 0x7c, 0x77, 0x7b, 0xf2, 0x6b, 0x6f, 0xc5, 0x30, 0x01, 0x67, 0x2b, 0xfe, 0xd7, 0xab, 0x76, 0xca, 0x82, 0xc9, 0x7d, 0xfa, 0x59, 0x47, 0xf0, 0xad, 0xd4, 0xa2, 0xaf, 0x9c, 0xa4, 0x72, 0xc0, 0xb7, 0xfd, 0x93, 0x26, 0x36, 0x3f, 0xf7, 0xcc, 0x34, 0xa5, 0xe5, 0xf1, 0x71, 0xd8, 0x31, 0x15, 0x04, 0xc7, 0x23, 0xc3, 0x18, 0x96, 0x05, 0x9a, 0x07, 0x12, 0x80, 0xe2, 0xeb, 0x27, 0xb2, 0x75, 0x09, 0x83, 0x2c, 0x1a, 0x1b, 0x6e, 0x5a, 0xa0, 0x52, 0x3b, 0xd6, 0xb3, 0x29, 0xe3, 0x2f, 0x84, 0x53, 0xd1, 0x00, 0xed, 0x20, 0xfc, 0xb1, 0x5b, 0x6a, 0xcb, 0xbe, 0x39, 0x4a, 0x4c, 0x58, 0xcf, 0xd0, 0xef, 0xaa, 0xfb, 0x43, 0x4d, 0x33, 0x85, 0x45, 0xf9, 0x02, 0x7f, 0x50, 0x3c, 0x9f, 0xa8, 0x51, 0xa3, 0x40, 0x8f, 0x92, 0x9d, 0x38, 0xf5, 0xbc, 0xb6, 0xda, 0x21, 0x10, 0xff, 0xf3, 0xd2, 0xcd, 0x0c, 0x13, 0xec, 0x5f, 0x97, 0x44, 0x17, 0xc4, 0xa7, 0x7e, 0x3d, 0x64, 0x5d, 0x19, 0x73, 0x60, 0x81, 0x4f, 0xdc, 0x22, 0x2a, 0x90, 0x88, 0x46, 0xee, 0xb8, 0x14, 0xde, 0x5e, 0x0b, 0xdb, 0xe0, 0x32, 0x3a, 0x0a, 0x49, 0x06, 0x24, 0x5c, 0xc2, 0xd3, 0xac, 0x62, 0x91, 0x95, 0xe4, 0x79, 0xe7, 0xc8, 0x37, 0x6d, 0x8d, 0xd5, 0x4e, 0xa9, 0x6c, 0x56, 0xf4, 0xea, 0x65, 0x7a, 0xae, 0x08, 0xba, 0x78, 0x25, 0x2e, 0x1c, 0xa6, 0xb4, 0xc6, 0xe8, 0xdd, 0x74, 0x1f, 0x4b, 0xbd, 0x8b, 0x8a, 0x70, 0x3e, 0xb5, 0x66, 0x48, 0x03, 0xf6, 0x0e, 0x61, 0x35, 0x57, 0xb9, 0x86, 0xc1, 0x1d, 0x9e, 0xe1, 0xf8, 0x98, 0x11, 0x69, 0xd9, 0x8e, 0x94, 0x9b, 0x1e, 0x87, 0xe9, 0xce, 0x55, 0x28, 0xdf, 0x8c, 0xa1, 0x89, 0x0d, 0xbf, 0xe6, 0x42, 0x68, 0x41, 0x99, 0x2d, 0x0f, 0xb0, 0x54, 0xbb, 0x16];
+           var Si = [0x52, 0x09, 0x6a, 0xd5, 0x30, 0x36, 0xa5, 0x38, 0xbf, 0x40, 0xa3, 0x9e, 0x81, 0xf3, 0xd7, 0xfb, 0x7c, 0xe3, 0x39, 0x82, 0x9b, 0x2f, 0xff, 0x87, 0x34, 0x8e, 0x43, 0x44, 0xc4, 0xde, 0xe9, 0xcb, 0x54, 0x7b, 0x94, 0x32, 0xa6, 0xc2, 0x23, 0x3d, 0xee, 0x4c, 0x95, 0x0b, 0x42, 0xfa, 0xc3, 0x4e, 0x08, 0x2e, 0xa1, 0x66, 0x28, 0xd9, 0x24, 0xb2, 0x76, 0x5b, 0xa2, 0x49, 0x6d, 0x8b, 0xd1, 0x25, 0x72, 0xf8, 0xf6, 0x64, 0x86, 0x68, 0x98, 0x16, 0xd4, 0xa4, 0x5c, 0xcc, 0x5d, 0x65, 0xb6, 0x92, 0x6c, 0x70, 0x48, 0x50, 0xfd, 0xed, 0xb9, 0xda, 0x5e, 0x15, 0x46, 0x57, 0xa7, 0x8d, 0x9d, 0x84, 0x90, 0xd8, 0xab, 0x00, 0x8c, 0xbc, 0xd3, 0x0a, 0xf7, 0xe4, 0x58, 0x05, 0xb8, 0xb3, 0x45, 0x06, 0xd0, 0x2c, 0x1e, 0x8f, 0xca, 0x3f, 0x0f, 0x02, 0xc1, 0xaf, 0xbd, 0x03, 0x01, 0x13, 0x8a, 0x6b, 0x3a, 0x91, 0x11, 0x41, 0x4f, 0x67, 0xdc, 0xea, 0x97, 0xf2, 0xcf, 0xce, 0xf0, 0xb4, 0xe6, 0x73, 0x96, 0xac, 0x74, 0x22, 0xe7, 0xad, 0x35, 0x85, 0xe2, 0xf9, 0x37, 0xe8, 0x1c, 0x75, 0xdf, 0x6e, 0x47, 0xf1, 0x1a, 0x71, 0x1d, 0x29, 0xc5, 0x89, 0x6f, 0xb7, 0x62, 0x0e, 0xaa, 0x18, 0xbe, 0x1b, 0xfc, 0x56, 0x3e, 0x4b, 0xc6, 0xd2, 0x79, 0x20, 0x9a, 0xdb, 0xc0, 0xfe, 0x78, 0xcd, 0x5a, 0xf4, 0x1f, 0xdd, 0xa8, 0x33, 0x88, 0x07, 0xc7, 0x31, 0xb1, 0x12, 0x10, 0x59, 0x27, 0x80, 0xec, 0x5f, 0x60, 0x51, 0x7f, 0xa9, 0x19, 0xb5, 0x4a, 0x0d, 0x2d, 0xe5, 0x7a, 0x9f, 0x93, 0xc9, 0x9c, 0xef, 0xa0, 0xe0, 0x3b, 0x4d, 0xae, 0x2a, 0xf5, 0xb0, 0xc8, 0xeb, 0xbb, 0x3c, 0x83, 0x53, 0x99, 0x61, 0x17, 0x2b, 0x04, 0x7e, 0xba, 0x77, 0xd6, 0x26, 0xe1, 0x69, 0x14, 0x63, 0x55, 0x21, 0x0c, 0x7d]; // Transformations for encryption
+
+           var T1 = [0xc66363a5, 0xf87c7c84, 0xee777799, 0xf67b7b8d, 0xfff2f20d, 0xd66b6bbd, 0xde6f6fb1, 0x91c5c554, 0x60303050, 0x02010103, 0xce6767a9, 0x562b2b7d, 0xe7fefe19, 0xb5d7d762, 0x4dababe6, 0xec76769a, 0x8fcaca45, 0x1f82829d, 0x89c9c940, 0xfa7d7d87, 0xeffafa15, 0xb25959eb, 0x8e4747c9, 0xfbf0f00b, 0x41adadec, 0xb3d4d467, 0x5fa2a2fd, 0x45afafea, 0x239c9cbf, 0x53a4a4f7, 0xe4727296, 0x9bc0c05b, 0x75b7b7c2, 0xe1fdfd1c, 0x3d9393ae, 0x4c26266a, 0x6c36365a, 0x7e3f3f41, 0xf5f7f702, 0x83cccc4f, 0x6834345c, 0x51a5a5f4, 0xd1e5e534, 0xf9f1f108, 0xe2717193, 0xabd8d873, 0x62313153, 0x2a15153f, 0x0804040c, 0x95c7c752, 0x46232365, 0x9dc3c35e, 0x30181828, 0x379696a1, 0x0a05050f, 0x2f9a9ab5, 0x0e070709, 0x24121236, 0x1b80809b, 0xdfe2e23d, 0xcdebeb26, 0x4e272769, 0x7fb2b2cd, 0xea75759f, 0x1209091b, 0x1d83839e, 0x582c2c74, 0x341a1a2e, 0x361b1b2d, 0xdc6e6eb2, 0xb45a5aee, 0x5ba0a0fb, 0xa45252f6, 0x763b3b4d, 0xb7d6d661, 0x7db3b3ce, 0x5229297b, 0xdde3e33e, 0x5e2f2f71, 0x13848497, 0xa65353f5, 0xb9d1d168, 0x00000000, 0xc1eded2c, 0x40202060, 0xe3fcfc1f, 0x79b1b1c8, 0xb65b5bed, 0xd46a6abe, 0x8dcbcb46, 0x67bebed9, 0x7239394b, 0x944a4ade, 0x984c4cd4, 0xb05858e8, 0x85cfcf4a, 0xbbd0d06b, 0xc5efef2a, 0x4faaaae5, 0xedfbfb16, 0x864343c5, 0x9a4d4dd7, 0x66333355, 0x11858594, 0x8a4545cf, 0xe9f9f910, 0x04020206, 0xfe7f7f81, 0xa05050f0, 0x783c3c44, 0x259f9fba, 0x4ba8a8e3, 0xa25151f3, 0x5da3a3fe, 0x804040c0, 0x058f8f8a, 0x3f9292ad, 0x219d9dbc, 0x70383848, 0xf1f5f504, 0x63bcbcdf, 0x77b6b6c1, 0xafdada75, 0x42212163, 0x20101030, 0xe5ffff1a, 0xfdf3f30e, 0xbfd2d26d, 0x81cdcd4c, 0x180c0c14, 0x26131335, 0xc3ecec2f, 0xbe5f5fe1, 0x359797a2, 0x884444cc, 0x2e171739, 0x93c4c457, 0x55a7a7f2, 0xfc7e7e82, 0x7a3d3d47, 0xc86464ac, 0xba5d5de7, 0x3219192b, 0xe6737395, 0xc06060a0, 0x19818198, 0x9e4f4fd1, 0xa3dcdc7f, 0x44222266, 0x542a2a7e, 0x3b9090ab, 0x0b888883, 0x8c4646ca, 0xc7eeee29, 0x6bb8b8d3, 0x2814143c, 0xa7dede79, 0xbc5e5ee2, 0x160b0b1d, 0xaddbdb76, 0xdbe0e03b, 0x64323256, 0x743a3a4e, 0x140a0a1e, 0x924949db, 0x0c06060a, 0x4824246c, 0xb85c5ce4, 0x9fc2c25d, 0xbdd3d36e, 0x43acacef, 0xc46262a6, 0x399191a8, 0x319595a4, 0xd3e4e437, 0xf279798b, 0xd5e7e732, 0x8bc8c843, 0x6e373759, 0xda6d6db7, 0x018d8d8c, 0xb1d5d564, 0x9c4e4ed2, 0x49a9a9e0, 0xd86c6cb4, 0xac5656fa, 0xf3f4f407, 0xcfeaea25, 0xca6565af, 0xf47a7a8e, 0x47aeaee9, 0x10080818, 0x6fbabad5, 0xf0787888, 0x4a25256f, 0x5c2e2e72, 0x381c1c24, 0x57a6a6f1, 0x73b4b4c7, 0x97c6c651, 0xcbe8e823, 0xa1dddd7c, 0xe874749c, 0x3e1f1f21, 0x964b4bdd, 0x61bdbddc, 0x0d8b8b86, 0x0f8a8a85, 0xe0707090, 0x7c3e3e42, 0x71b5b5c4, 0xcc6666aa, 0x904848d8, 0x06030305, 0xf7f6f601, 0x1c0e0e12, 0xc26161a3, 0x6a35355f, 0xae5757f9, 0x69b9b9d0, 0x17868691, 0x99c1c158, 0x3a1d1d27, 0x279e9eb9, 0xd9e1e138, 0xebf8f813, 0x2b9898b3, 0x22111133, 0xd26969bb, 0xa9d9d970, 0x078e8e89, 0x339494a7, 0x2d9b9bb6, 0x3c1e1e22, 0x15878792, 0xc9e9e920, 0x87cece49, 0xaa5555ff, 0x50282878, 0xa5dfdf7a, 0x038c8c8f, 0x59a1a1f8, 0x09898980, 0x1a0d0d17, 0x65bfbfda, 0xd7e6e631, 0x844242c6, 0xd06868b8, 0x824141c3, 0x299999b0, 0x5a2d2d77, 0x1e0f0f11, 0x7bb0b0cb, 0xa85454fc, 0x6dbbbbd6, 0x2c16163a];
+           var T2 = [0xa5c66363, 0x84f87c7c, 0x99ee7777, 0x8df67b7b, 0x0dfff2f2, 0xbdd66b6b, 0xb1de6f6f, 0x5491c5c5, 0x50603030, 0x03020101, 0xa9ce6767, 0x7d562b2b, 0x19e7fefe, 0x62b5d7d7, 0xe64dabab, 0x9aec7676, 0x458fcaca, 0x9d1f8282, 0x4089c9c9, 0x87fa7d7d, 0x15effafa, 0xebb25959, 0xc98e4747, 0x0bfbf0f0, 0xec41adad, 0x67b3d4d4, 0xfd5fa2a2, 0xea45afaf, 0xbf239c9c, 0xf753a4a4, 0x96e47272, 0x5b9bc0c0, 0xc275b7b7, 0x1ce1fdfd, 0xae3d9393, 0x6a4c2626, 0x5a6c3636, 0x417e3f3f, 0x02f5f7f7, 0x4f83cccc, 0x5c683434, 0xf451a5a5, 0x34d1e5e5, 0x08f9f1f1, 0x93e27171, 0x73abd8d8, 0x53623131, 0x3f2a1515, 0x0c080404, 0x5295c7c7, 0x65462323, 0x5e9dc3c3, 0x28301818, 0xa1379696, 0x0f0a0505, 0xb52f9a9a, 0x090e0707, 0x36241212, 0x9b1b8080, 0x3ddfe2e2, 0x26cdebeb, 0x694e2727, 0xcd7fb2b2, 0x9fea7575, 0x1b120909, 0x9e1d8383, 0x74582c2c, 0x2e341a1a, 0x2d361b1b, 0xb2dc6e6e, 0xeeb45a5a, 0xfb5ba0a0, 0xf6a45252, 0x4d763b3b, 0x61b7d6d6, 0xce7db3b3, 0x7b522929, 0x3edde3e3, 0x715e2f2f, 0x97138484, 0xf5a65353, 0x68b9d1d1, 0x00000000, 0x2cc1eded, 0x60402020, 0x1fe3fcfc, 0xc879b1b1, 0xedb65b5b, 0xbed46a6a, 0x468dcbcb, 0xd967bebe, 0x4b723939, 0xde944a4a, 0xd4984c4c, 0xe8b05858, 0x4a85cfcf, 0x6bbbd0d0, 0x2ac5efef, 0xe54faaaa, 0x16edfbfb, 0xc5864343, 0xd79a4d4d, 0x55663333, 0x94118585, 0xcf8a4545, 0x10e9f9f9, 0x06040202, 0x81fe7f7f, 0xf0a05050, 0x44783c3c, 0xba259f9f, 0xe34ba8a8, 0xf3a25151, 0xfe5da3a3, 0xc0804040, 0x8a058f8f, 0xad3f9292, 0xbc219d9d, 0x48703838, 0x04f1f5f5, 0xdf63bcbc, 0xc177b6b6, 0x75afdada, 0x63422121, 0x30201010, 0x1ae5ffff, 0x0efdf3f3, 0x6dbfd2d2, 0x4c81cdcd, 0x14180c0c, 0x35261313, 0x2fc3ecec, 0xe1be5f5f, 0xa2359797, 0xcc884444, 0x392e1717, 0x5793c4c4, 0xf255a7a7, 0x82fc7e7e, 0x477a3d3d, 0xacc86464, 0xe7ba5d5d, 0x2b321919, 0x95e67373, 0xa0c06060, 0x98198181, 0xd19e4f4f, 0x7fa3dcdc, 0x66442222, 0x7e542a2a, 0xab3b9090, 0x830b8888, 0xca8c4646, 0x29c7eeee, 0xd36bb8b8, 0x3c281414, 0x79a7dede, 0xe2bc5e5e, 0x1d160b0b, 0x76addbdb, 0x3bdbe0e0, 0x56643232, 0x4e743a3a, 0x1e140a0a, 0xdb924949, 0x0a0c0606, 0x6c482424, 0xe4b85c5c, 0x5d9fc2c2, 0x6ebdd3d3, 0xef43acac, 0xa6c46262, 0xa8399191, 0xa4319595, 0x37d3e4e4, 0x8bf27979, 0x32d5e7e7, 0x438bc8c8, 0x596e3737, 0xb7da6d6d, 0x8c018d8d, 0x64b1d5d5, 0xd29c4e4e, 0xe049a9a9, 0xb4d86c6c, 0xfaac5656, 0x07f3f4f4, 0x25cfeaea, 0xafca6565, 0x8ef47a7a, 0xe947aeae, 0x18100808, 0xd56fbaba, 0x88f07878, 0x6f4a2525, 0x725c2e2e, 0x24381c1c, 0xf157a6a6, 0xc773b4b4, 0x5197c6c6, 0x23cbe8e8, 0x7ca1dddd, 0x9ce87474, 0x213e1f1f, 0xdd964b4b, 0xdc61bdbd, 0x860d8b8b, 0x850f8a8a, 0x90e07070, 0x427c3e3e, 0xc471b5b5, 0xaacc6666, 0xd8904848, 0x05060303, 0x01f7f6f6, 0x121c0e0e, 0xa3c26161, 0x5f6a3535, 0xf9ae5757, 0xd069b9b9, 0x91178686, 0x5899c1c1, 0x273a1d1d, 0xb9279e9e, 0x38d9e1e1, 0x13ebf8f8, 0xb32b9898, 0x33221111, 0xbbd26969, 0x70a9d9d9, 0x89078e8e, 0xa7339494, 0xb62d9b9b, 0x223c1e1e, 0x92158787, 0x20c9e9e9, 0x4987cece, 0xffaa5555, 0x78502828, 0x7aa5dfdf, 0x8f038c8c, 0xf859a1a1, 0x80098989, 0x171a0d0d, 0xda65bfbf, 0x31d7e6e6, 0xc6844242, 0xb8d06868, 0xc3824141, 0xb0299999, 0x775a2d2d, 0x111e0f0f, 0xcb7bb0b0, 0xfca85454, 0xd66dbbbb, 0x3a2c1616];
+           var T3 = [0x63a5c663, 0x7c84f87c, 0x7799ee77, 0x7b8df67b, 0xf20dfff2, 0x6bbdd66b, 0x6fb1de6f, 0xc55491c5, 0x30506030, 0x01030201, 0x67a9ce67, 0x2b7d562b, 0xfe19e7fe, 0xd762b5d7, 0xabe64dab, 0x769aec76, 0xca458fca, 0x829d1f82, 0xc94089c9, 0x7d87fa7d, 0xfa15effa, 0x59ebb259, 0x47c98e47, 0xf00bfbf0, 0xadec41ad, 0xd467b3d4, 0xa2fd5fa2, 0xafea45af, 0x9cbf239c, 0xa4f753a4, 0x7296e472, 0xc05b9bc0, 0xb7c275b7, 0xfd1ce1fd, 0x93ae3d93, 0x266a4c26, 0x365a6c36, 0x3f417e3f, 0xf702f5f7, 0xcc4f83cc, 0x345c6834, 0xa5f451a5, 0xe534d1e5, 0xf108f9f1, 0x7193e271, 0xd873abd8, 0x31536231, 0x153f2a15, 0x040c0804, 0xc75295c7, 0x23654623, 0xc35e9dc3, 0x18283018, 0x96a13796, 0x050f0a05, 0x9ab52f9a, 0x07090e07, 0x12362412, 0x809b1b80, 0xe23ddfe2, 0xeb26cdeb, 0x27694e27, 0xb2cd7fb2, 0x759fea75, 0x091b1209, 0x839e1d83, 0x2c74582c, 0x1a2e341a, 0x1b2d361b, 0x6eb2dc6e, 0x5aeeb45a, 0xa0fb5ba0, 0x52f6a452, 0x3b4d763b, 0xd661b7d6, 0xb3ce7db3, 0x297b5229, 0xe33edde3, 0x2f715e2f, 0x84971384, 0x53f5a653, 0xd168b9d1, 0x00000000, 0xed2cc1ed, 0x20604020, 0xfc1fe3fc, 0xb1c879b1, 0x5bedb65b, 0x6abed46a, 0xcb468dcb, 0xbed967be, 0x394b7239, 0x4ade944a, 0x4cd4984c, 0x58e8b058, 0xcf4a85cf, 0xd06bbbd0, 0xef2ac5ef, 0xaae54faa, 0xfb16edfb, 0x43c58643, 0x4dd79a4d, 0x33556633, 0x85941185, 0x45cf8a45, 0xf910e9f9, 0x02060402, 0x7f81fe7f, 0x50f0a050, 0x3c44783c, 0x9fba259f, 0xa8e34ba8, 0x51f3a251, 0xa3fe5da3, 0x40c08040, 0x8f8a058f, 0x92ad3f92, 0x9dbc219d, 0x38487038, 0xf504f1f5, 0xbcdf63bc, 0xb6c177b6, 0xda75afda, 0x21634221, 0x10302010, 0xff1ae5ff, 0xf30efdf3, 0xd26dbfd2, 0xcd4c81cd, 0x0c14180c, 0x13352613, 0xec2fc3ec, 0x5fe1be5f, 0x97a23597, 0x44cc8844, 0x17392e17, 0xc45793c4, 0xa7f255a7, 0x7e82fc7e, 0x3d477a3d, 0x64acc864, 0x5de7ba5d, 0x192b3219, 0x7395e673, 0x60a0c060, 0x81981981, 0x4fd19e4f, 0xdc7fa3dc, 0x22664422, 0x2a7e542a, 0x90ab3b90, 0x88830b88, 0x46ca8c46, 0xee29c7ee, 0xb8d36bb8, 0x143c2814, 0xde79a7de, 0x5ee2bc5e, 0x0b1d160b, 0xdb76addb, 0xe03bdbe0, 0x32566432, 0x3a4e743a, 0x0a1e140a, 0x49db9249, 0x060a0c06, 0x246c4824, 0x5ce4b85c, 0xc25d9fc2, 0xd36ebdd3, 0xacef43ac, 0x62a6c462, 0x91a83991, 0x95a43195, 0xe437d3e4, 0x798bf279, 0xe732d5e7, 0xc8438bc8, 0x37596e37, 0x6db7da6d, 0x8d8c018d, 0xd564b1d5, 0x4ed29c4e, 0xa9e049a9, 0x6cb4d86c, 0x56faac56, 0xf407f3f4, 0xea25cfea, 0x65afca65, 0x7a8ef47a, 0xaee947ae, 0x08181008, 0xbad56fba, 0x7888f078, 0x256f4a25, 0x2e725c2e, 0x1c24381c, 0xa6f157a6, 0xb4c773b4, 0xc65197c6, 0xe823cbe8, 0xdd7ca1dd, 0x749ce874, 0x1f213e1f, 0x4bdd964b, 0xbddc61bd, 0x8b860d8b, 0x8a850f8a, 0x7090e070, 0x3e427c3e, 0xb5c471b5, 0x66aacc66, 0x48d89048, 0x03050603, 0xf601f7f6, 0x0e121c0e, 0x61a3c261, 0x355f6a35, 0x57f9ae57, 0xb9d069b9, 0x86911786, 0xc15899c1, 0x1d273a1d, 0x9eb9279e, 0xe138d9e1, 0xf813ebf8, 0x98b32b98, 0x11332211, 0x69bbd269, 0xd970a9d9, 0x8e89078e, 0x94a73394, 0x9bb62d9b, 0x1e223c1e, 0x87921587, 0xe920c9e9, 0xce4987ce, 0x55ffaa55, 0x28785028, 0xdf7aa5df, 0x8c8f038c, 0xa1f859a1, 0x89800989, 0x0d171a0d, 0xbfda65bf, 0xe631d7e6, 0x42c68442, 0x68b8d068, 0x41c38241, 0x99b02999, 0x2d775a2d, 0x0f111e0f, 0xb0cb7bb0, 0x54fca854, 0xbbd66dbb, 0x163a2c16];
+           var T4 = [0x6363a5c6, 0x7c7c84f8, 0x777799ee, 0x7b7b8df6, 0xf2f20dff, 0x6b6bbdd6, 0x6f6fb1de, 0xc5c55491, 0x30305060, 0x01010302, 0x6767a9ce, 0x2b2b7d56, 0xfefe19e7, 0xd7d762b5, 0xababe64d, 0x76769aec, 0xcaca458f, 0x82829d1f, 0xc9c94089, 0x7d7d87fa, 0xfafa15ef, 0x5959ebb2, 0x4747c98e, 0xf0f00bfb, 0xadadec41, 0xd4d467b3, 0xa2a2fd5f, 0xafafea45, 0x9c9cbf23, 0xa4a4f753, 0x727296e4, 0xc0c05b9b, 0xb7b7c275, 0xfdfd1ce1, 0x9393ae3d, 0x26266a4c, 0x36365a6c, 0x3f3f417e, 0xf7f702f5, 0xcccc4f83, 0x34345c68, 0xa5a5f451, 0xe5e534d1, 0xf1f108f9, 0x717193e2, 0xd8d873ab, 0x31315362, 0x15153f2a, 0x04040c08, 0xc7c75295, 0x23236546, 0xc3c35e9d, 0x18182830, 0x9696a137, 0x05050f0a, 0x9a9ab52f, 0x0707090e, 0x12123624, 0x80809b1b, 0xe2e23ddf, 0xebeb26cd, 0x2727694e, 0xb2b2cd7f, 0x75759fea, 0x09091b12, 0x83839e1d, 0x2c2c7458, 0x1a1a2e34, 0x1b1b2d36, 0x6e6eb2dc, 0x5a5aeeb4, 0xa0a0fb5b, 0x5252f6a4, 0x3b3b4d76, 0xd6d661b7, 0xb3b3ce7d, 0x29297b52, 0xe3e33edd, 0x2f2f715e, 0x84849713, 0x5353f5a6, 0xd1d168b9, 0x00000000, 0xeded2cc1, 0x20206040, 0xfcfc1fe3, 0xb1b1c879, 0x5b5bedb6, 0x6a6abed4, 0xcbcb468d, 0xbebed967, 0x39394b72, 0x4a4ade94, 0x4c4cd498, 0x5858e8b0, 0xcfcf4a85, 0xd0d06bbb, 0xefef2ac5, 0xaaaae54f, 0xfbfb16ed, 0x4343c586, 0x4d4dd79a, 0x33335566, 0x85859411, 0x4545cf8a, 0xf9f910e9, 0x02020604, 0x7f7f81fe, 0x5050f0a0, 0x3c3c4478, 0x9f9fba25, 0xa8a8e34b, 0x5151f3a2, 0xa3a3fe5d, 0x4040c080, 0x8f8f8a05, 0x9292ad3f, 0x9d9dbc21, 0x38384870, 0xf5f504f1, 0xbcbcdf63, 0xb6b6c177, 0xdada75af, 0x21216342, 0x10103020, 0xffff1ae5, 0xf3f30efd, 0xd2d26dbf, 0xcdcd4c81, 0x0c0c1418, 0x13133526, 0xecec2fc3, 0x5f5fe1be, 0x9797a235, 0x4444cc88, 0x1717392e, 0xc4c45793, 0xa7a7f255, 0x7e7e82fc, 0x3d3d477a, 0x6464acc8, 0x5d5de7ba, 0x19192b32, 0x737395e6, 0x6060a0c0, 0x81819819, 0x4f4fd19e, 0xdcdc7fa3, 0x22226644, 0x2a2a7e54, 0x9090ab3b, 0x8888830b, 0x4646ca8c, 0xeeee29c7, 0xb8b8d36b, 0x14143c28, 0xdede79a7, 0x5e5ee2bc, 0x0b0b1d16, 0xdbdb76ad, 0xe0e03bdb, 0x32325664, 0x3a3a4e74, 0x0a0a1e14, 0x4949db92, 0x06060a0c, 0x24246c48, 0x5c5ce4b8, 0xc2c25d9f, 0xd3d36ebd, 0xacacef43, 0x6262a6c4, 0x9191a839, 0x9595a431, 0xe4e437d3, 0x79798bf2, 0xe7e732d5, 0xc8c8438b, 0x3737596e, 0x6d6db7da, 0x8d8d8c01, 0xd5d564b1, 0x4e4ed29c, 0xa9a9e049, 0x6c6cb4d8, 0x5656faac, 0xf4f407f3, 0xeaea25cf, 0x6565afca, 0x7a7a8ef4, 0xaeaee947, 0x08081810, 0xbabad56f, 0x787888f0, 0x25256f4a, 0x2e2e725c, 0x1c1c2438, 0xa6a6f157, 0xb4b4c773, 0xc6c65197, 0xe8e823cb, 0xdddd7ca1, 0x74749ce8, 0x1f1f213e, 0x4b4bdd96, 0xbdbddc61, 0x8b8b860d, 0x8a8a850f, 0x707090e0, 0x3e3e427c, 0xb5b5c471, 0x6666aacc, 0x4848d890, 0x03030506, 0xf6f601f7, 0x0e0e121c, 0x6161a3c2, 0x35355f6a, 0x5757f9ae, 0xb9b9d069, 0x86869117, 0xc1c15899, 0x1d1d273a, 0x9e9eb927, 0xe1e138d9, 0xf8f813eb, 0x9898b32b, 0x11113322, 0x6969bbd2, 0xd9d970a9, 0x8e8e8907, 0x9494a733, 0x9b9bb62d, 0x1e1e223c, 0x87879215, 0xe9e920c9, 0xcece4987, 0x5555ffaa, 0x28287850, 0xdfdf7aa5, 0x8c8c8f03, 0xa1a1f859, 0x89898009, 0x0d0d171a, 0xbfbfda65, 0xe6e631d7, 0x4242c684, 0x6868b8d0, 0x4141c382, 0x9999b029, 0x2d2d775a, 0x0f0f111e, 0xb0b0cb7b, 0x5454fca8, 0xbbbbd66d, 0x16163a2c]; // Transformations for decryption
+
+           var T5 = [0x51f4a750, 0x7e416553, 0x1a17a4c3, 0x3a275e96, 0x3bab6bcb, 0x1f9d45f1, 0xacfa58ab, 0x4be30393, 0x2030fa55, 0xad766df6, 0x88cc7691, 0xf5024c25, 0x4fe5d7fc, 0xc52acbd7, 0x26354480, 0xb562a38f, 0xdeb15a49, 0x25ba1b67, 0x45ea0e98, 0x5dfec0e1, 0xc32f7502, 0x814cf012, 0x8d4697a3, 0x6bd3f9c6, 0x038f5fe7, 0x15929c95, 0xbf6d7aeb, 0x955259da, 0xd4be832d, 0x587421d3, 0x49e06929, 0x8ec9c844, 0x75c2896a, 0xf48e7978, 0x99583e6b, 0x27b971dd, 0xbee14fb6, 0xf088ad17, 0xc920ac66, 0x7dce3ab4, 0x63df4a18, 0xe51a3182, 0x97513360, 0x62537f45, 0xb16477e0, 0xbb6bae84, 0xfe81a01c, 0xf9082b94, 0x70486858, 0x8f45fd19, 0x94de6c87, 0x527bf8b7, 0xab73d323, 0x724b02e2, 0xe31f8f57, 0x6655ab2a, 0xb2eb2807, 0x2fb5c203, 0x86c57b9a, 0xd33708a5, 0x302887f2, 0x23bfa5b2, 0x02036aba, 0xed16825c, 0x8acf1c2b, 0xa779b492, 0xf307f2f0, 0x4e69e2a1, 0x65daf4cd, 0x0605bed5, 0xd134621f, 0xc4a6fe8a, 0x342e539d, 0xa2f355a0, 0x058ae132, 0xa4f6eb75, 0x0b83ec39, 0x4060efaa, 0x5e719f06, 0xbd6e1051, 0x3e218af9, 0x96dd063d, 0xdd3e05ae, 0x4de6bd46, 0x91548db5, 0x71c45d05, 0x0406d46f, 0x605015ff, 0x1998fb24, 0xd6bde997, 0x894043cc, 0x67d99e77, 0xb0e842bd, 0x07898b88, 0xe7195b38, 0x79c8eedb, 0xa17c0a47, 0x7c420fe9, 0xf8841ec9, 0x00000000, 0x09808683, 0x322bed48, 0x1e1170ac, 0x6c5a724e, 0xfd0efffb, 0x0f853856, 0x3daed51e, 0x362d3927, 0x0a0fd964, 0x685ca621, 0x9b5b54d1, 0x24362e3a, 0x0c0a67b1, 0x9357e70f, 0xb4ee96d2, 0x1b9b919e, 0x80c0c54f, 0x61dc20a2, 0x5a774b69, 0x1c121a16, 0xe293ba0a, 0xc0a02ae5, 0x3c22e043, 0x121b171d, 0x0e090d0b, 0xf28bc7ad, 0x2db6a8b9, 0x141ea9c8, 0x57f11985, 0xaf75074c, 0xee99ddbb, 0xa37f60fd, 0xf701269f, 0x5c72f5bc, 0x44663bc5, 0x5bfb7e34, 0x8b432976, 0xcb23c6dc, 0xb6edfc68, 0xb8e4f163, 0xd731dcca, 0x42638510, 0x13972240, 0x84c61120, 0x854a247d, 0xd2bb3df8, 0xaef93211, 0xc729a16d, 0x1d9e2f4b, 0xdcb230f3, 0x0d8652ec, 0x77c1e3d0, 0x2bb3166c, 0xa970b999, 0x119448fa, 0x47e96422, 0xa8fc8cc4, 0xa0f03f1a, 0x567d2cd8, 0x223390ef, 0x87494ec7, 0xd938d1c1, 0x8ccaa2fe, 0x98d40b36, 0xa6f581cf, 0xa57ade28, 0xdab78e26, 0x3fadbfa4, 0x2c3a9de4, 0x5078920d, 0x6a5fcc9b, 0x547e4662, 0xf68d13c2, 0x90d8b8e8, 0x2e39f75e, 0x82c3aff5, 0x9f5d80be, 0x69d0937c, 0x6fd52da9, 0xcf2512b3, 0xc8ac993b, 0x10187da7, 0xe89c636e, 0xdb3bbb7b, 0xcd267809, 0x6e5918f4, 0xec9ab701, 0x834f9aa8, 0xe6956e65, 0xaaffe67e, 0x21bccf08, 0xef15e8e6, 0xbae79bd9, 0x4a6f36ce, 0xea9f09d4, 0x29b07cd6, 0x31a4b2af, 0x2a3f2331, 0xc6a59430, 0x35a266c0, 0x744ebc37, 0xfc82caa6, 0xe090d0b0, 0x33a7d815, 0xf104984a, 0x41ecdaf7, 0x7fcd500e, 0x1791f62f, 0x764dd68d, 0x43efb04d, 0xccaa4d54, 0xe49604df, 0x9ed1b5e3, 0x4c6a881b, 0xc12c1fb8, 0x4665517f, 0x9d5eea04, 0x018c355d, 0xfa877473, 0xfb0b412e, 0xb3671d5a, 0x92dbd252, 0xe9105633, 0x6dd64713, 0x9ad7618c, 0x37a10c7a, 0x59f8148e, 0xeb133c89, 0xcea927ee, 0xb761c935, 0xe11ce5ed, 0x7a47b13c, 0x9cd2df59, 0x55f2733f, 0x1814ce79, 0x73c737bf, 0x53f7cdea, 0x5ffdaa5b, 0xdf3d6f14, 0x7844db86, 0xcaaff381, 0xb968c43e, 0x3824342c, 0xc2a3405f, 0x161dc372, 0xbce2250c, 0x283c498b, 0xff0d9541, 0x39a80171, 0x080cb3de, 0xd8b4e49c, 0x6456c190, 0x7bcb8461, 0xd532b670, 0x486c5c74, 0xd0b85742];
+           var T6 = [0x5051f4a7, 0x537e4165, 0xc31a17a4, 0x963a275e, 0xcb3bab6b, 0xf11f9d45, 0xabacfa58, 0x934be303, 0x552030fa, 0xf6ad766d, 0x9188cc76, 0x25f5024c, 0xfc4fe5d7, 0xd7c52acb, 0x80263544, 0x8fb562a3, 0x49deb15a, 0x6725ba1b, 0x9845ea0e, 0xe15dfec0, 0x02c32f75, 0x12814cf0, 0xa38d4697, 0xc66bd3f9, 0xe7038f5f, 0x9515929c, 0xebbf6d7a, 0xda955259, 0x2dd4be83, 0xd3587421, 0x2949e069, 0x448ec9c8, 0x6a75c289, 0x78f48e79, 0x6b99583e, 0xdd27b971, 0xb6bee14f, 0x17f088ad, 0x66c920ac, 0xb47dce3a, 0x1863df4a, 0x82e51a31, 0x60975133, 0x4562537f, 0xe0b16477, 0x84bb6bae, 0x1cfe81a0, 0x94f9082b, 0x58704868, 0x198f45fd, 0x8794de6c, 0xb7527bf8, 0x23ab73d3, 0xe2724b02, 0x57e31f8f, 0x2a6655ab, 0x07b2eb28, 0x032fb5c2, 0x9a86c57b, 0xa5d33708, 0xf2302887, 0xb223bfa5, 0xba02036a, 0x5ced1682, 0x2b8acf1c, 0x92a779b4, 0xf0f307f2, 0xa14e69e2, 0xcd65daf4, 0xd50605be, 0x1fd13462, 0x8ac4a6fe, 0x9d342e53, 0xa0a2f355, 0x32058ae1, 0x75a4f6eb, 0x390b83ec, 0xaa4060ef, 0x065e719f, 0x51bd6e10, 0xf93e218a, 0x3d96dd06, 0xaedd3e05, 0x464de6bd, 0xb591548d, 0x0571c45d, 0x6f0406d4, 0xff605015, 0x241998fb, 0x97d6bde9, 0xcc894043, 0x7767d99e, 0xbdb0e842, 0x8807898b, 0x38e7195b, 0xdb79c8ee, 0x47a17c0a, 0xe97c420f, 0xc9f8841e, 0x00000000, 0x83098086, 0x48322bed, 0xac1e1170, 0x4e6c5a72, 0xfbfd0eff, 0x560f8538, 0x1e3daed5, 0x27362d39, 0x640a0fd9, 0x21685ca6, 0xd19b5b54, 0x3a24362e, 0xb10c0a67, 0x0f9357e7, 0xd2b4ee96, 0x9e1b9b91, 0x4f80c0c5, 0xa261dc20, 0x695a774b, 0x161c121a, 0x0ae293ba, 0xe5c0a02a, 0x433c22e0, 0x1d121b17, 0x0b0e090d, 0xadf28bc7, 0xb92db6a8, 0xc8141ea9, 0x8557f119, 0x4caf7507, 0xbbee99dd, 0xfda37f60, 0x9ff70126, 0xbc5c72f5, 0xc544663b, 0x345bfb7e, 0x768b4329, 0xdccb23c6, 0x68b6edfc, 0x63b8e4f1, 0xcad731dc, 0x10426385, 0x40139722, 0x2084c611, 0x7d854a24, 0xf8d2bb3d, 0x11aef932, 0x6dc729a1, 0x4b1d9e2f, 0xf3dcb230, 0xec0d8652, 0xd077c1e3, 0x6c2bb316, 0x99a970b9, 0xfa119448, 0x2247e964, 0xc4a8fc8c, 0x1aa0f03f, 0xd8567d2c, 0xef223390, 0xc787494e, 0xc1d938d1, 0xfe8ccaa2, 0x3698d40b, 0xcfa6f581, 0x28a57ade, 0x26dab78e, 0xa43fadbf, 0xe42c3a9d, 0x0d507892, 0x9b6a5fcc, 0x62547e46, 0xc2f68d13, 0xe890d8b8, 0x5e2e39f7, 0xf582c3af, 0xbe9f5d80, 0x7c69d093, 0xa96fd52d, 0xb3cf2512, 0x3bc8ac99, 0xa710187d, 0x6ee89c63, 0x7bdb3bbb, 0x09cd2678, 0xf46e5918, 0x01ec9ab7, 0xa8834f9a, 0x65e6956e, 0x7eaaffe6, 0x0821bccf, 0xe6ef15e8, 0xd9bae79b, 0xce4a6f36, 0xd4ea9f09, 0xd629b07c, 0xaf31a4b2, 0x312a3f23, 0x30c6a594, 0xc035a266, 0x37744ebc, 0xa6fc82ca, 0xb0e090d0, 0x1533a7d8, 0x4af10498, 0xf741ecda, 0x0e7fcd50, 0x2f1791f6, 0x8d764dd6, 0x4d43efb0, 0x54ccaa4d, 0xdfe49604, 0xe39ed1b5, 0x1b4c6a88, 0xb8c12c1f, 0x7f466551, 0x049d5eea, 0x5d018c35, 0x73fa8774, 0x2efb0b41, 0x5ab3671d, 0x5292dbd2, 0x33e91056, 0x136dd647, 0x8c9ad761, 0x7a37a10c, 0x8e59f814, 0x89eb133c, 0xeecea927, 0x35b761c9, 0xede11ce5, 0x3c7a47b1, 0x599cd2df, 0x3f55f273, 0x791814ce, 0xbf73c737, 0xea53f7cd, 0x5b5ffdaa, 0x14df3d6f, 0x867844db, 0x81caaff3, 0x3eb968c4, 0x2c382434, 0x5fc2a340, 0x72161dc3, 0x0cbce225, 0x8b283c49, 0x41ff0d95, 0x7139a801, 0xde080cb3, 0x9cd8b4e4, 0x906456c1, 0x617bcb84, 0x70d532b6, 0x74486c5c, 0x42d0b857];
+           var T7 = [0xa75051f4, 0x65537e41, 0xa4c31a17, 0x5e963a27, 0x6bcb3bab, 0x45f11f9d, 0x58abacfa, 0x03934be3, 0xfa552030, 0x6df6ad76, 0x769188cc, 0x4c25f502, 0xd7fc4fe5, 0xcbd7c52a, 0x44802635, 0xa38fb562, 0x5a49deb1, 0x1b6725ba, 0x0e9845ea, 0xc0e15dfe, 0x7502c32f, 0xf012814c, 0x97a38d46, 0xf9c66bd3, 0x5fe7038f, 0x9c951592, 0x7aebbf6d, 0x59da9552, 0x832dd4be, 0x21d35874, 0x692949e0, 0xc8448ec9, 0x896a75c2, 0x7978f48e, 0x3e6b9958, 0x71dd27b9, 0x4fb6bee1, 0xad17f088, 0xac66c920, 0x3ab47dce, 0x4a1863df, 0x3182e51a, 0x33609751, 0x7f456253, 0x77e0b164, 0xae84bb6b, 0xa01cfe81, 0x2b94f908, 0x68587048, 0xfd198f45, 0x6c8794de, 0xf8b7527b, 0xd323ab73, 0x02e2724b, 0x8f57e31f, 0xab2a6655, 0x2807b2eb, 0xc2032fb5, 0x7b9a86c5, 0x08a5d337, 0x87f23028, 0xa5b223bf, 0x6aba0203, 0x825ced16, 0x1c2b8acf, 0xb492a779, 0xf2f0f307, 0xe2a14e69, 0xf4cd65da, 0xbed50605, 0x621fd134, 0xfe8ac4a6, 0x539d342e, 0x55a0a2f3, 0xe132058a, 0xeb75a4f6, 0xec390b83, 0xefaa4060, 0x9f065e71, 0x1051bd6e, 0x8af93e21, 0x063d96dd, 0x05aedd3e, 0xbd464de6, 0x8db59154, 0x5d0571c4, 0xd46f0406, 0x15ff6050, 0xfb241998, 0xe997d6bd, 0x43cc8940, 0x9e7767d9, 0x42bdb0e8, 0x8b880789, 0x5b38e719, 0xeedb79c8, 0x0a47a17c, 0x0fe97c42, 0x1ec9f884, 0x00000000, 0x86830980, 0xed48322b, 0x70ac1e11, 0x724e6c5a, 0xfffbfd0e, 0x38560f85, 0xd51e3dae, 0x3927362d, 0xd9640a0f, 0xa621685c, 0x54d19b5b, 0x2e3a2436, 0x67b10c0a, 0xe70f9357, 0x96d2b4ee, 0x919e1b9b, 0xc54f80c0, 0x20a261dc, 0x4b695a77, 0x1a161c12, 0xba0ae293, 0x2ae5c0a0, 0xe0433c22, 0x171d121b, 0x0d0b0e09, 0xc7adf28b, 0xa8b92db6, 0xa9c8141e, 0x198557f1, 0x074caf75, 0xddbbee99, 0x60fda37f, 0x269ff701, 0xf5bc5c72, 0x3bc54466, 0x7e345bfb, 0x29768b43, 0xc6dccb23, 0xfc68b6ed, 0xf163b8e4, 0xdccad731, 0x85104263, 0x22401397, 0x112084c6, 0x247d854a, 0x3df8d2bb, 0x3211aef9, 0xa16dc729, 0x2f4b1d9e, 0x30f3dcb2, 0x52ec0d86, 0xe3d077c1, 0x166c2bb3, 0xb999a970, 0x48fa1194, 0x642247e9, 0x8cc4a8fc, 0x3f1aa0f0, 0x2cd8567d, 0x90ef2233, 0x4ec78749, 0xd1c1d938, 0xa2fe8cca, 0x0b3698d4, 0x81cfa6f5, 0xde28a57a, 0x8e26dab7, 0xbfa43fad, 0x9de42c3a, 0x920d5078, 0xcc9b6a5f, 0x4662547e, 0x13c2f68d, 0xb8e890d8, 0xf75e2e39, 0xaff582c3, 0x80be9f5d, 0x937c69d0, 0x2da96fd5, 0x12b3cf25, 0x993bc8ac, 0x7da71018, 0x636ee89c, 0xbb7bdb3b, 0x7809cd26, 0x18f46e59, 0xb701ec9a, 0x9aa8834f, 0x6e65e695, 0xe67eaaff, 0xcf0821bc, 0xe8e6ef15, 0x9bd9bae7, 0x36ce4a6f, 0x09d4ea9f, 0x7cd629b0, 0xb2af31a4, 0x23312a3f, 0x9430c6a5, 0x66c035a2, 0xbc37744e, 0xcaa6fc82, 0xd0b0e090, 0xd81533a7, 0x984af104, 0xdaf741ec, 0x500e7fcd, 0xf62f1791, 0xd68d764d, 0xb04d43ef, 0x4d54ccaa, 0x04dfe496, 0xb5e39ed1, 0x881b4c6a, 0x1fb8c12c, 0x517f4665, 0xea049d5e, 0x355d018c, 0x7473fa87, 0x412efb0b, 0x1d5ab367, 0xd25292db, 0x5633e910, 0x47136dd6, 0x618c9ad7, 0x0c7a37a1, 0x148e59f8, 0x3c89eb13, 0x27eecea9, 0xc935b761, 0xe5ede11c, 0xb13c7a47, 0xdf599cd2, 0x733f55f2, 0xce791814, 0x37bf73c7, 0xcdea53f7, 0xaa5b5ffd, 0x6f14df3d, 0xdb867844, 0xf381caaf, 0xc43eb968, 0x342c3824, 0x405fc2a3, 0xc372161d, 0x250cbce2, 0x498b283c, 0x9541ff0d, 0x017139a8, 0xb3de080c, 0xe49cd8b4, 0xc1906456, 0x84617bcb, 0xb670d532, 0x5c74486c, 0x5742d0b8];
+           var T8 = [0xf4a75051, 0x4165537e, 0x17a4c31a, 0x275e963a, 0xab6bcb3b, 0x9d45f11f, 0xfa58abac, 0xe303934b, 0x30fa5520, 0x766df6ad, 0xcc769188, 0x024c25f5, 0xe5d7fc4f, 0x2acbd7c5, 0x35448026, 0x62a38fb5, 0xb15a49de, 0xba1b6725, 0xea0e9845, 0xfec0e15d, 0x2f7502c3, 0x4cf01281, 0x4697a38d, 0xd3f9c66b, 0x8f5fe703, 0x929c9515, 0x6d7aebbf, 0x5259da95, 0xbe832dd4, 0x7421d358, 0xe0692949, 0xc9c8448e, 0xc2896a75, 0x8e7978f4, 0x583e6b99, 0xb971dd27, 0xe14fb6be, 0x88ad17f0, 0x20ac66c9, 0xce3ab47d, 0xdf4a1863, 0x1a3182e5, 0x51336097, 0x537f4562, 0x6477e0b1, 0x6bae84bb, 0x81a01cfe, 0x082b94f9, 0x48685870, 0x45fd198f, 0xde6c8794, 0x7bf8b752, 0x73d323ab, 0x4b02e272, 0x1f8f57e3, 0x55ab2a66, 0xeb2807b2, 0xb5c2032f, 0xc57b9a86, 0x3708a5d3, 0x2887f230, 0xbfa5b223, 0x036aba02, 0x16825ced, 0xcf1c2b8a, 0x79b492a7, 0x07f2f0f3, 0x69e2a14e, 0xdaf4cd65, 0x05bed506, 0x34621fd1, 0xa6fe8ac4, 0x2e539d34, 0xf355a0a2, 0x8ae13205, 0xf6eb75a4, 0x83ec390b, 0x60efaa40, 0x719f065e, 0x6e1051bd, 0x218af93e, 0xdd063d96, 0x3e05aedd, 0xe6bd464d, 0x548db591, 0xc45d0571, 0x06d46f04, 0x5015ff60, 0x98fb2419, 0xbde997d6, 0x4043cc89, 0xd99e7767, 0xe842bdb0, 0x898b8807, 0x195b38e7, 0xc8eedb79, 0x7c0a47a1, 0x420fe97c, 0x841ec9f8, 0x00000000, 0x80868309, 0x2bed4832, 0x1170ac1e, 0x5a724e6c, 0x0efffbfd, 0x8538560f, 0xaed51e3d, 0x2d392736, 0x0fd9640a, 0x5ca62168, 0x5b54d19b, 0x362e3a24, 0x0a67b10c, 0x57e70f93, 0xee96d2b4, 0x9b919e1b, 0xc0c54f80, 0xdc20a261, 0x774b695a, 0x121a161c, 0x93ba0ae2, 0xa02ae5c0, 0x22e0433c, 0x1b171d12, 0x090d0b0e, 0x8bc7adf2, 0xb6a8b92d, 0x1ea9c814, 0xf1198557, 0x75074caf, 0x99ddbbee, 0x7f60fda3, 0x01269ff7, 0x72f5bc5c, 0x663bc544, 0xfb7e345b, 0x4329768b, 0x23c6dccb, 0xedfc68b6, 0xe4f163b8, 0x31dccad7, 0x63851042, 0x97224013, 0xc6112084, 0x4a247d85, 0xbb3df8d2, 0xf93211ae, 0x29a16dc7, 0x9e2f4b1d, 0xb230f3dc, 0x8652ec0d, 0xc1e3d077, 0xb3166c2b, 0x70b999a9, 0x9448fa11, 0xe9642247, 0xfc8cc4a8, 0xf03f1aa0, 0x7d2cd856, 0x3390ef22, 0x494ec787, 0x38d1c1d9, 0xcaa2fe8c, 0xd40b3698, 0xf581cfa6, 0x7ade28a5, 0xb78e26da, 0xadbfa43f, 0x3a9de42c, 0x78920d50, 0x5fcc9b6a, 0x7e466254, 0x8d13c2f6, 0xd8b8e890, 0x39f75e2e, 0xc3aff582, 0x5d80be9f, 0xd0937c69, 0xd52da96f, 0x2512b3cf, 0xac993bc8, 0x187da710, 0x9c636ee8, 0x3bbb7bdb, 0x267809cd, 0x5918f46e, 0x9ab701ec, 0x4f9aa883, 0x956e65e6, 0xffe67eaa, 0xbccf0821, 0x15e8e6ef, 0xe79bd9ba, 0x6f36ce4a, 0x9f09d4ea, 0xb07cd629, 0xa4b2af31, 0x3f23312a, 0xa59430c6, 0xa266c035, 0x4ebc3774, 0x82caa6fc, 0x90d0b0e0, 0xa7d81533, 0x04984af1, 0xecdaf741, 0xcd500e7f, 0x91f62f17, 0x4dd68d76, 0xefb04d43, 0xaa4d54cc, 0x9604dfe4, 0xd1b5e39e, 0x6a881b4c, 0x2c1fb8c1, 0x65517f46, 0x5eea049d, 0x8c355d01, 0x877473fa, 0x0b412efb, 0x671d5ab3, 0xdbd25292, 0x105633e9, 0xd647136d, 0xd7618c9a, 0xa10c7a37, 0xf8148e59, 0x133c89eb, 0xa927eece, 0x61c935b7, 0x1ce5ede1, 0x47b13c7a, 0xd2df599c, 0xf2733f55, 0x14ce7918, 0xc737bf73, 0xf7cdea53, 0xfdaa5b5f, 0x3d6f14df, 0x44db8678, 0xaff381ca, 0x68c43eb9, 0x24342c38, 0xa3405fc2, 0x1dc37216, 0xe2250cbc, 0x3c498b28, 0x0d9541ff, 0xa8017139, 0x0cb3de08, 0xb4e49cd8, 0x56c19064, 0xcb84617b, 0x32b670d5, 0x6c5c7448, 0xb85742d0]; // Transformations for decryption key expansion
+
+           var U1 = [0x00000000, 0x0e090d0b, 0x1c121a16, 0x121b171d, 0x3824342c, 0x362d3927, 0x24362e3a, 0x2a3f2331, 0x70486858, 0x7e416553, 0x6c5a724e, 0x62537f45, 0x486c5c74, 0x4665517f, 0x547e4662, 0x5a774b69, 0xe090d0b0, 0xee99ddbb, 0xfc82caa6, 0xf28bc7ad, 0xd8b4e49c, 0xd6bde997, 0xc4a6fe8a, 0xcaaff381, 0x90d8b8e8, 0x9ed1b5e3, 0x8ccaa2fe, 0x82c3aff5, 0xa8fc8cc4, 0xa6f581cf, 0xb4ee96d2, 0xbae79bd9, 0xdb3bbb7b, 0xd532b670, 0xc729a16d, 0xc920ac66, 0xe31f8f57, 0xed16825c, 0xff0d9541, 0xf104984a, 0xab73d323, 0xa57ade28, 0xb761c935, 0xb968c43e, 0x9357e70f, 0x9d5eea04, 0x8f45fd19, 0x814cf012, 0x3bab6bcb, 0x35a266c0, 0x27b971dd, 0x29b07cd6, 0x038f5fe7, 0x0d8652ec, 0x1f9d45f1, 0x119448fa, 0x4be30393, 0x45ea0e98, 0x57f11985, 0x59f8148e, 0x73c737bf, 0x7dce3ab4, 0x6fd52da9, 0x61dc20a2, 0xad766df6, 0xa37f60fd, 0xb16477e0, 0xbf6d7aeb, 0x955259da, 0x9b5b54d1, 0x894043cc, 0x87494ec7, 0xdd3e05ae, 0xd33708a5, 0xc12c1fb8, 0xcf2512b3, 0xe51a3182, 0xeb133c89, 0xf9082b94, 0xf701269f, 0x4de6bd46, 0x43efb04d, 0x51f4a750, 0x5ffdaa5b, 0x75c2896a, 0x7bcb8461, 0x69d0937c, 0x67d99e77, 0x3daed51e, 0x33a7d815, 0x21bccf08, 0x2fb5c203, 0x058ae132, 0x0b83ec39, 0x1998fb24, 0x1791f62f, 0x764dd68d, 0x7844db86, 0x6a5fcc9b, 0x6456c190, 0x4e69e2a1, 0x4060efaa, 0x527bf8b7, 0x5c72f5bc, 0x0605bed5, 0x080cb3de, 0x1a17a4c3, 0x141ea9c8, 0x3e218af9, 0x302887f2, 0x223390ef, 0x2c3a9de4, 0x96dd063d, 0x98d40b36, 0x8acf1c2b, 0x84c61120, 0xaef93211, 0xa0f03f1a, 0xb2eb2807, 0xbce2250c, 0xe6956e65, 0xe89c636e, 0xfa877473, 0xf48e7978, 0xdeb15a49, 0xd0b85742, 0xc2a3405f, 0xccaa4d54, 0x41ecdaf7, 0x4fe5d7fc, 0x5dfec0e1, 0x53f7cdea, 0x79c8eedb, 0x77c1e3d0, 0x65daf4cd, 0x6bd3f9c6, 0x31a4b2af, 0x3fadbfa4, 0x2db6a8b9, 0x23bfa5b2, 0x09808683, 0x07898b88, 0x15929c95, 0x1b9b919e, 0xa17c0a47, 0xaf75074c, 0xbd6e1051, 0xb3671d5a, 0x99583e6b, 0x97513360, 0x854a247d, 0x8b432976, 0xd134621f, 0xdf3d6f14, 0xcd267809, 0xc32f7502, 0xe9105633, 0xe7195b38, 0xf5024c25, 0xfb0b412e, 0x9ad7618c, 0x94de6c87, 0x86c57b9a, 0x88cc7691, 0xa2f355a0, 0xacfa58ab, 0xbee14fb6, 0xb0e842bd, 0xea9f09d4, 0xe49604df, 0xf68d13c2, 0xf8841ec9, 0xd2bb3df8, 0xdcb230f3, 0xcea927ee, 0xc0a02ae5, 0x7a47b13c, 0x744ebc37, 0x6655ab2a, 0x685ca621, 0x42638510, 0x4c6a881b, 0x5e719f06, 0x5078920d, 0x0a0fd964, 0x0406d46f, 0x161dc372, 0x1814ce79, 0x322bed48, 0x3c22e043, 0x2e39f75e, 0x2030fa55, 0xec9ab701, 0xe293ba0a, 0xf088ad17, 0xfe81a01c, 0xd4be832d, 0xdab78e26, 0xc8ac993b, 0xc6a59430, 0x9cd2df59, 0x92dbd252, 0x80c0c54f, 0x8ec9c844, 0xa4f6eb75, 0xaaffe67e, 0xb8e4f163, 0xb6edfc68, 0x0c0a67b1, 0x02036aba, 0x10187da7, 0x1e1170ac, 0x342e539d, 0x3a275e96, 0x283c498b, 0x26354480, 0x7c420fe9, 0x724b02e2, 0x605015ff, 0x6e5918f4, 0x44663bc5, 0x4a6f36ce, 0x587421d3, 0x567d2cd8, 0x37a10c7a, 0x39a80171, 0x2bb3166c, 0x25ba1b67, 0x0f853856, 0x018c355d, 0x13972240, 0x1d9e2f4b, 0x47e96422, 0x49e06929, 0x5bfb7e34, 0x55f2733f, 0x7fcd500e, 0x71c45d05, 0x63df4a18, 0x6dd64713, 0xd731dcca, 0xd938d1c1, 0xcb23c6dc, 0xc52acbd7, 0xef15e8e6, 0xe11ce5ed, 0xf307f2f0, 0xfd0efffb, 0xa779b492, 0xa970b999, 0xbb6bae84, 0xb562a38f, 0x9f5d80be, 0x91548db5, 0x834f9aa8, 0x8d4697a3];
+           var U2 = [0x00000000, 0x0b0e090d, 0x161c121a, 0x1d121b17, 0x2c382434, 0x27362d39, 0x3a24362e, 0x312a3f23, 0x58704868, 0x537e4165, 0x4e6c5a72, 0x4562537f, 0x74486c5c, 0x7f466551, 0x62547e46, 0x695a774b, 0xb0e090d0, 0xbbee99dd, 0xa6fc82ca, 0xadf28bc7, 0x9cd8b4e4, 0x97d6bde9, 0x8ac4a6fe, 0x81caaff3, 0xe890d8b8, 0xe39ed1b5, 0xfe8ccaa2, 0xf582c3af, 0xc4a8fc8c, 0xcfa6f581, 0xd2b4ee96, 0xd9bae79b, 0x7bdb3bbb, 0x70d532b6, 0x6dc729a1, 0x66c920ac, 0x57e31f8f, 0x5ced1682, 0x41ff0d95, 0x4af10498, 0x23ab73d3, 0x28a57ade, 0x35b761c9, 0x3eb968c4, 0x0f9357e7, 0x049d5eea, 0x198f45fd, 0x12814cf0, 0xcb3bab6b, 0xc035a266, 0xdd27b971, 0xd629b07c, 0xe7038f5f, 0xec0d8652, 0xf11f9d45, 0xfa119448, 0x934be303, 0x9845ea0e, 0x8557f119, 0x8e59f814, 0xbf73c737, 0xb47dce3a, 0xa96fd52d, 0xa261dc20, 0xf6ad766d, 0xfda37f60, 0xe0b16477, 0xebbf6d7a, 0xda955259, 0xd19b5b54, 0xcc894043, 0xc787494e, 0xaedd3e05, 0xa5d33708, 0xb8c12c1f, 0xb3cf2512, 0x82e51a31, 0x89eb133c, 0x94f9082b, 0x9ff70126, 0x464de6bd, 0x4d43efb0, 0x5051f4a7, 0x5b5ffdaa, 0x6a75c289, 0x617bcb84, 0x7c69d093, 0x7767d99e, 0x1e3daed5, 0x1533a7d8, 0x0821bccf, 0x032fb5c2, 0x32058ae1, 0x390b83ec, 0x241998fb, 0x2f1791f6, 0x8d764dd6, 0x867844db, 0x9b6a5fcc, 0x906456c1, 0xa14e69e2, 0xaa4060ef, 0xb7527bf8, 0xbc5c72f5, 0xd50605be, 0xde080cb3, 0xc31a17a4, 0xc8141ea9, 0xf93e218a, 0xf2302887, 0xef223390, 0xe42c3a9d, 0x3d96dd06, 0x3698d40b, 0x2b8acf1c, 0x2084c611, 0x11aef932, 0x1aa0f03f, 0x07b2eb28, 0x0cbce225, 0x65e6956e, 0x6ee89c63, 0x73fa8774, 0x78f48e79, 0x49deb15a, 0x42d0b857, 0x5fc2a340, 0x54ccaa4d, 0xf741ecda, 0xfc4fe5d7, 0xe15dfec0, 0xea53f7cd, 0xdb79c8ee, 0xd077c1e3, 0xcd65daf4, 0xc66bd3f9, 0xaf31a4b2, 0xa43fadbf, 0xb92db6a8, 0xb223bfa5, 0x83098086, 0x8807898b, 0x9515929c, 0x9e1b9b91, 0x47a17c0a, 0x4caf7507, 0x51bd6e10, 0x5ab3671d, 0x6b99583e, 0x60975133, 0x7d854a24, 0x768b4329, 0x1fd13462, 0x14df3d6f, 0x09cd2678, 0x02c32f75, 0x33e91056, 0x38e7195b, 0x25f5024c, 0x2efb0b41, 0x8c9ad761, 0x8794de6c, 0x9a86c57b, 0x9188cc76, 0xa0a2f355, 0xabacfa58, 0xb6bee14f, 0xbdb0e842, 0xd4ea9f09, 0xdfe49604, 0xc2f68d13, 0xc9f8841e, 0xf8d2bb3d, 0xf3dcb230, 0xeecea927, 0xe5c0a02a, 0x3c7a47b1, 0x37744ebc, 0x2a6655ab, 0x21685ca6, 0x10426385, 0x1b4c6a88, 0x065e719f, 0x0d507892, 0x640a0fd9, 0x6f0406d4, 0x72161dc3, 0x791814ce, 0x48322bed, 0x433c22e0, 0x5e2e39f7, 0x552030fa, 0x01ec9ab7, 0x0ae293ba, 0x17f088ad, 0x1cfe81a0, 0x2dd4be83, 0x26dab78e, 0x3bc8ac99, 0x30c6a594, 0x599cd2df, 0x5292dbd2, 0x4f80c0c5, 0x448ec9c8, 0x75a4f6eb, 0x7eaaffe6, 0x63b8e4f1, 0x68b6edfc, 0xb10c0a67, 0xba02036a, 0xa710187d, 0xac1e1170, 0x9d342e53, 0x963a275e, 0x8b283c49, 0x80263544, 0xe97c420f, 0xe2724b02, 0xff605015, 0xf46e5918, 0xc544663b, 0xce4a6f36, 0xd3587421, 0xd8567d2c, 0x7a37a10c, 0x7139a801, 0x6c2bb316, 0x6725ba1b, 0x560f8538, 0x5d018c35, 0x40139722, 0x4b1d9e2f, 0x2247e964, 0x2949e069, 0x345bfb7e, 0x3f55f273, 0x0e7fcd50, 0x0571c45d, 0x1863df4a, 0x136dd647, 0xcad731dc, 0xc1d938d1, 0xdccb23c6, 0xd7c52acb, 0xe6ef15e8, 0xede11ce5, 0xf0f307f2, 0xfbfd0eff, 0x92a779b4, 0x99a970b9, 0x84bb6bae, 0x8fb562a3, 0xbe9f5d80, 0xb591548d, 0xa8834f9a, 0xa38d4697];
+           var U3 = [0x00000000, 0x0d0b0e09, 0x1a161c12, 0x171d121b, 0x342c3824, 0x3927362d, 0x2e3a2436, 0x23312a3f, 0x68587048, 0x65537e41, 0x724e6c5a, 0x7f456253, 0x5c74486c, 0x517f4665, 0x4662547e, 0x4b695a77, 0xd0b0e090, 0xddbbee99, 0xcaa6fc82, 0xc7adf28b, 0xe49cd8b4, 0xe997d6bd, 0xfe8ac4a6, 0xf381caaf, 0xb8e890d8, 0xb5e39ed1, 0xa2fe8cca, 0xaff582c3, 0x8cc4a8fc, 0x81cfa6f5, 0x96d2b4ee, 0x9bd9bae7, 0xbb7bdb3b, 0xb670d532, 0xa16dc729, 0xac66c920, 0x8f57e31f, 0x825ced16, 0x9541ff0d, 0x984af104, 0xd323ab73, 0xde28a57a, 0xc935b761, 0xc43eb968, 0xe70f9357, 0xea049d5e, 0xfd198f45, 0xf012814c, 0x6bcb3bab, 0x66c035a2, 0x71dd27b9, 0x7cd629b0, 0x5fe7038f, 0x52ec0d86, 0x45f11f9d, 0x48fa1194, 0x03934be3, 0x0e9845ea, 0x198557f1, 0x148e59f8, 0x37bf73c7, 0x3ab47dce, 0x2da96fd5, 0x20a261dc, 0x6df6ad76, 0x60fda37f, 0x77e0b164, 0x7aebbf6d, 0x59da9552, 0x54d19b5b, 0x43cc8940, 0x4ec78749, 0x05aedd3e, 0x08a5d337, 0x1fb8c12c, 0x12b3cf25, 0x3182e51a, 0x3c89eb13, 0x2b94f908, 0x269ff701, 0xbd464de6, 0xb04d43ef, 0xa75051f4, 0xaa5b5ffd, 0x896a75c2, 0x84617bcb, 0x937c69d0, 0x9e7767d9, 0xd51e3dae, 0xd81533a7, 0xcf0821bc, 0xc2032fb5, 0xe132058a, 0xec390b83, 0xfb241998, 0xf62f1791, 0xd68d764d, 0xdb867844, 0xcc9b6a5f, 0xc1906456, 0xe2a14e69, 0xefaa4060, 0xf8b7527b, 0xf5bc5c72, 0xbed50605, 0xb3de080c, 0xa4c31a17, 0xa9c8141e, 0x8af93e21, 0x87f23028, 0x90ef2233, 0x9de42c3a, 0x063d96dd, 0x0b3698d4, 0x1c2b8acf, 0x112084c6, 0x3211aef9, 0x3f1aa0f0, 0x2807b2eb, 0x250cbce2, 0x6e65e695, 0x636ee89c, 0x7473fa87, 0x7978f48e, 0x5a49deb1, 0x5742d0b8, 0x405fc2a3, 0x4d54ccaa, 0xdaf741ec, 0xd7fc4fe5, 0xc0e15dfe, 0xcdea53f7, 0xeedb79c8, 0xe3d077c1, 0xf4cd65da, 0xf9c66bd3, 0xb2af31a4, 0xbfa43fad, 0xa8b92db6, 0xa5b223bf, 0x86830980, 0x8b880789, 0x9c951592, 0x919e1b9b, 0x0a47a17c, 0x074caf75, 0x1051bd6e, 0x1d5ab367, 0x3e6b9958, 0x33609751, 0x247d854a, 0x29768b43, 0x621fd134, 0x6f14df3d, 0x7809cd26, 0x7502c32f, 0x5633e910, 0x5b38e719, 0x4c25f502, 0x412efb0b, 0x618c9ad7, 0x6c8794de, 0x7b9a86c5, 0x769188cc, 0x55a0a2f3, 0x58abacfa, 0x4fb6bee1, 0x42bdb0e8, 0x09d4ea9f, 0x04dfe496, 0x13c2f68d, 0x1ec9f884, 0x3df8d2bb, 0x30f3dcb2, 0x27eecea9, 0x2ae5c0a0, 0xb13c7a47, 0xbc37744e, 0xab2a6655, 0xa621685c, 0x85104263, 0x881b4c6a, 0x9f065e71, 0x920d5078, 0xd9640a0f, 0xd46f0406, 0xc372161d, 0xce791814, 0xed48322b, 0xe0433c22, 0xf75e2e39, 0xfa552030, 0xb701ec9a, 0xba0ae293, 0xad17f088, 0xa01cfe81, 0x832dd4be, 0x8e26dab7, 0x993bc8ac, 0x9430c6a5, 0xdf599cd2, 0xd25292db, 0xc54f80c0, 0xc8448ec9, 0xeb75a4f6, 0xe67eaaff, 0xf163b8e4, 0xfc68b6ed, 0x67b10c0a, 0x6aba0203, 0x7da71018, 0x70ac1e11, 0x539d342e, 0x5e963a27, 0x498b283c, 0x44802635, 0x0fe97c42, 0x02e2724b, 0x15ff6050, 0x18f46e59, 0x3bc54466, 0x36ce4a6f, 0x21d35874, 0x2cd8567d, 0x0c7a37a1, 0x017139a8, 0x166c2bb3, 0x1b6725ba, 0x38560f85, 0x355d018c, 0x22401397, 0x2f4b1d9e, 0x642247e9, 0x692949e0, 0x7e345bfb, 0x733f55f2, 0x500e7fcd, 0x5d0571c4, 0x4a1863df, 0x47136dd6, 0xdccad731, 0xd1c1d938, 0xc6dccb23, 0xcbd7c52a, 0xe8e6ef15, 0xe5ede11c, 0xf2f0f307, 0xfffbfd0e, 0xb492a779, 0xb999a970, 0xae84bb6b, 0xa38fb562, 0x80be9f5d, 0x8db59154, 0x9aa8834f, 0x97a38d46];
+           var U4 = [0x00000000, 0x090d0b0e, 0x121a161c, 0x1b171d12, 0x24342c38, 0x2d392736, 0x362e3a24, 0x3f23312a, 0x48685870, 0x4165537e, 0x5a724e6c, 0x537f4562, 0x6c5c7448, 0x65517f46, 0x7e466254, 0x774b695a, 0x90d0b0e0, 0x99ddbbee, 0x82caa6fc, 0x8bc7adf2, 0xb4e49cd8, 0xbde997d6, 0xa6fe8ac4, 0xaff381ca, 0xd8b8e890, 0xd1b5e39e, 0xcaa2fe8c, 0xc3aff582, 0xfc8cc4a8, 0xf581cfa6, 0xee96d2b4, 0xe79bd9ba, 0x3bbb7bdb, 0x32b670d5, 0x29a16dc7, 0x20ac66c9, 0x1f8f57e3, 0x16825ced, 0x0d9541ff, 0x04984af1, 0x73d323ab, 0x7ade28a5, 0x61c935b7, 0x68c43eb9, 0x57e70f93, 0x5eea049d, 0x45fd198f, 0x4cf01281, 0xab6bcb3b, 0xa266c035, 0xb971dd27, 0xb07cd629, 0x8f5fe703, 0x8652ec0d, 0x9d45f11f, 0x9448fa11, 0xe303934b, 0xea0e9845, 0xf1198557, 0xf8148e59, 0xc737bf73, 0xce3ab47d, 0xd52da96f, 0xdc20a261, 0x766df6ad, 0x7f60fda3, 0x6477e0b1, 0x6d7aebbf, 0x5259da95, 0x5b54d19b, 0x4043cc89, 0x494ec787, 0x3e05aedd, 0x3708a5d3, 0x2c1fb8c1, 0x2512b3cf, 0x1a3182e5, 0x133c89eb, 0x082b94f9, 0x01269ff7, 0xe6bd464d, 0xefb04d43, 0xf4a75051, 0xfdaa5b5f, 0xc2896a75, 0xcb84617b, 0xd0937c69, 0xd99e7767, 0xaed51e3d, 0xa7d81533, 0xbccf0821, 0xb5c2032f, 0x8ae13205, 0x83ec390b, 0x98fb2419, 0x91f62f17, 0x4dd68d76, 0x44db8678, 0x5fcc9b6a, 0x56c19064, 0x69e2a14e, 0x60efaa40, 0x7bf8b752, 0x72f5bc5c, 0x05bed506, 0x0cb3de08, 0x17a4c31a, 0x1ea9c814, 0x218af93e, 0x2887f230, 0x3390ef22, 0x3a9de42c, 0xdd063d96, 0xd40b3698, 0xcf1c2b8a, 0xc6112084, 0xf93211ae, 0xf03f1aa0, 0xeb2807b2, 0xe2250cbc, 0x956e65e6, 0x9c636ee8, 0x877473fa, 0x8e7978f4, 0xb15a49de, 0xb85742d0, 0xa3405fc2, 0xaa4d54cc, 0xecdaf741, 0xe5d7fc4f, 0xfec0e15d, 0xf7cdea53, 0xc8eedb79, 0xc1e3d077, 0xdaf4cd65, 0xd3f9c66b, 0xa4b2af31, 0xadbfa43f, 0xb6a8b92d, 0xbfa5b223, 0x80868309, 0x898b8807, 0x929c9515, 0x9b919e1b, 0x7c0a47a1, 0x75074caf, 0x6e1051bd, 0x671d5ab3, 0x583e6b99, 0x51336097, 0x4a247d85, 0x4329768b, 0x34621fd1, 0x3d6f14df, 0x267809cd, 0x2f7502c3, 0x105633e9, 0x195b38e7, 0x024c25f5, 0x0b412efb, 0xd7618c9a, 0xde6c8794, 0xc57b9a86, 0xcc769188, 0xf355a0a2, 0xfa58abac, 0xe14fb6be, 0xe842bdb0, 0x9f09d4ea, 0x9604dfe4, 0x8d13c2f6, 0x841ec9f8, 0xbb3df8d2, 0xb230f3dc, 0xa927eece, 0xa02ae5c0, 0x47b13c7a, 0x4ebc3774, 0x55ab2a66, 0x5ca62168, 0x63851042, 0x6a881b4c, 0x719f065e, 0x78920d50, 0x0fd9640a, 0x06d46f04, 0x1dc37216, 0x14ce7918, 0x2bed4832, 0x22e0433c, 0x39f75e2e, 0x30fa5520, 0x9ab701ec, 0x93ba0ae2, 0x88ad17f0, 0x81a01cfe, 0xbe832dd4, 0xb78e26da, 0xac993bc8, 0xa59430c6, 0xd2df599c, 0xdbd25292, 0xc0c54f80, 0xc9c8448e, 0xf6eb75a4, 0xffe67eaa, 0xe4f163b8, 0xedfc68b6, 0x0a67b10c, 0x036aba02, 0x187da710, 0x1170ac1e, 0x2e539d34, 0x275e963a, 0x3c498b28, 0x35448026, 0x420fe97c, 0x4b02e272, 0x5015ff60, 0x5918f46e, 0x663bc544, 0x6f36ce4a, 0x7421d358, 0x7d2cd856, 0xa10c7a37, 0xa8017139, 0xb3166c2b, 0xba1b6725, 0x8538560f, 0x8c355d01, 0x97224013, 0x9e2f4b1d, 0xe9642247, 0xe0692949, 0xfb7e345b, 0xf2733f55, 0xcd500e7f, 0xc45d0571, 0xdf4a1863, 0xd647136d, 0x31dccad7, 0x38d1c1d9, 0x23c6dccb, 0x2acbd7c5, 0x15e8e6ef, 0x1ce5ede1, 0x07f2f0f3, 0x0efffbfd, 0x79b492a7, 0x70b999a9, 0x6bae84bb, 0x62a38fb5, 0x5d80be9f, 0x548db591, 0x4f9aa883, 0x4697a38d];
+
+           function convertToInt32(bytes) {
+             var result = [];
+
+             for (var i = 0; i < bytes.length; i += 4) {
+               result.push(bytes[i] << 24 | bytes[i + 1] << 16 | bytes[i + 2] << 8 | bytes[i + 3]);
+             }
+
+             return result;
+           }
+
+           var AES = function AES(key) {
+             if (!(this instanceof AES)) {
+               throw Error('AES must be instanitated with `new`');
+             }
+
+             Object.defineProperty(this, 'key', {
+               value: coerceArray(key, true)
+             });
+
+             this._prepare();
+           };
+
+           AES.prototype._prepare = function () {
+             var rounds = numberOfRounds[this.key.length];
+
+             if (rounds == null) {
+               throw new Error('invalid key size (must be 16, 24 or 32 bytes)');
+             } // encryption round keys
+
+
+             this._Ke = []; // decryption round keys
+
+             this._Kd = [];
+
+             for (var i = 0; i <= rounds; i++) {
+               this._Ke.push([0, 0, 0, 0]);
+
+               this._Kd.push([0, 0, 0, 0]);
+             }
+
+             var roundKeyCount = (rounds + 1) * 4;
+             var KC = this.key.length / 4; // convert the key into ints
+
+             var tk = convertToInt32(this.key); // copy values into round key arrays
+
+             var index;
+
+             for (var i = 0; i < KC; i++) {
+               index = i >> 2;
+               this._Ke[index][i % 4] = tk[i];
+               this._Kd[rounds - index][i % 4] = tk[i];
+             } // key expansion (fips-197 section 5.2)
+
+
+             var rconpointer = 0;
+             var t = KC,
+                 tt;
+
+             while (t < roundKeyCount) {
+               tt = tk[KC - 1];
+               tk[0] ^= S[tt >> 16 & 0xFF] << 24 ^ S[tt >> 8 & 0xFF] << 16 ^ S[tt & 0xFF] << 8 ^ S[tt >> 24 & 0xFF] ^ rcon[rconpointer] << 24;
+               rconpointer += 1; // key expansion (for non-256 bit)
+
+               if (KC != 8) {
+                 for (var i = 1; i < KC; i++) {
+                   tk[i] ^= tk[i - 1];
+                 } // key expansion for 256-bit keys is "slightly different" (fips-197)
+
+               } else {
+                 for (var i = 1; i < KC / 2; i++) {
+                   tk[i] ^= tk[i - 1];
+                 }
+
+                 tt = tk[KC / 2 - 1];
+                 tk[KC / 2] ^= S[tt & 0xFF] ^ S[tt >> 8 & 0xFF] << 8 ^ S[tt >> 16 & 0xFF] << 16 ^ S[tt >> 24 & 0xFF] << 24;
+
+                 for (var i = KC / 2 + 1; i < KC; i++) {
+                   tk[i] ^= tk[i - 1];
+                 }
+               } // copy values into round key arrays
+
+
+               var i = 0,
+                   r,
+                   c;
+
+               while (i < KC && t < roundKeyCount) {
+                 r = t >> 2;
+                 c = t % 4;
+                 this._Ke[r][c] = tk[i];
+                 this._Kd[rounds - r][c] = tk[i++];
+                 t++;
+               }
+             } // inverse-cipher-ify the decryption round key (fips-197 section 5.3)
+
+
+             for (var r = 1; r < rounds; r++) {
+               for (var c = 0; c < 4; c++) {
+                 tt = this._Kd[r][c];
+                 this._Kd[r][c] = U1[tt >> 24 & 0xFF] ^ U2[tt >> 16 & 0xFF] ^ U3[tt >> 8 & 0xFF] ^ U4[tt & 0xFF];
+               }
+             }
+           };
+
+           AES.prototype.encrypt = function (plaintext) {
+             if (plaintext.length != 16) {
+               throw new Error('invalid plaintext size (must be 16 bytes)');
+             }
+
+             var rounds = this._Ke.length - 1;
+             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
+
+             var t = convertToInt32(plaintext);
+
+             for (var i = 0; i < 4; i++) {
+               t[i] ^= this._Ke[0][i];
+             } // apply round transforms
+
+
+             for (var r = 1; r < rounds; r++) {
+               for (var i = 0; i < 4; i++) {
+                 a[i] = T1[t[i] >> 24 & 0xff] ^ T2[t[(i + 1) % 4] >> 16 & 0xff] ^ T3[t[(i + 2) % 4] >> 8 & 0xff] ^ T4[t[(i + 3) % 4] & 0xff] ^ this._Ke[r][i];
+               }
+
+               t = a.slice();
+             } // the last round is special
+
+
+             var result = createArray(16),
+                 tt;
+
+             for (var i = 0; i < 4; i++) {
+               tt = this._Ke[rounds][i];
+               result[4 * i] = (S[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+               result[4 * i + 1] = (S[t[(i + 1) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+               result[4 * i + 2] = (S[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+               result[4 * i + 3] = (S[t[(i + 3) % 4] & 0xff] ^ tt) & 0xff;
+             }
+
+             return result;
+           };
+
+           AES.prototype.decrypt = function (ciphertext) {
+             if (ciphertext.length != 16) {
+               throw new Error('invalid ciphertext size (must be 16 bytes)');
+             }
+
+             var rounds = this._Kd.length - 1;
+             var a = [0, 0, 0, 0]; // convert plaintext to (ints ^ key)
+
+             var t = convertToInt32(ciphertext);
+
+             for (var i = 0; i < 4; i++) {
+               t[i] ^= this._Kd[0][i];
+             } // apply round transforms
+
+
+             for (var r = 1; r < rounds; r++) {
+               for (var i = 0; i < 4; i++) {
+                 a[i] = T5[t[i] >> 24 & 0xff] ^ T6[t[(i + 3) % 4] >> 16 & 0xff] ^ T7[t[(i + 2) % 4] >> 8 & 0xff] ^ T8[t[(i + 1) % 4] & 0xff] ^ this._Kd[r][i];
+               }
+
+               t = a.slice();
+             } // the last round is special
+
+
+             var result = createArray(16),
+                 tt;
+
+             for (var i = 0; i < 4; i++) {
+               tt = this._Kd[rounds][i];
+               result[4 * i] = (Si[t[i] >> 24 & 0xff] ^ tt >> 24) & 0xff;
+               result[4 * i + 1] = (Si[t[(i + 3) % 4] >> 16 & 0xff] ^ tt >> 16) & 0xff;
+               result[4 * i + 2] = (Si[t[(i + 2) % 4] >> 8 & 0xff] ^ tt >> 8) & 0xff;
+               result[4 * i + 3] = (Si[t[(i + 1) % 4] & 0xff] ^ tt) & 0xff;
+             }
+
+             return result;
+           };
+           /**
+            *  Mode Of Operation - Electonic Codebook (ECB)
+            */
+
+
+           var ModeOfOperationECB = function ModeOfOperationECB(key) {
+             if (!(this instanceof ModeOfOperationECB)) {
+               throw Error('AES must be instanitated with `new`');
+             }
+
+             this.description = "Electronic Code Block";
+             this.name = "ecb";
+             this._aes = new AES(key);
+           };
+
+           ModeOfOperationECB.prototype.encrypt = function (plaintext) {
+             plaintext = coerceArray(plaintext);
+
+             if (plaintext.length % 16 !== 0) {
+               throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+             }
+
+             var ciphertext = createArray(plaintext.length);
+             var block = createArray(16);
+
+             for (var i = 0; i < plaintext.length; i += 16) {
+               copyArray(plaintext, block, 0, i, i + 16);
+               block = this._aes.encrypt(block);
+               copyArray(block, ciphertext, i);
+             }
+
+             return ciphertext;
+           };
+
+           ModeOfOperationECB.prototype.decrypt = function (ciphertext) {
+             ciphertext = coerceArray(ciphertext);
+
+             if (ciphertext.length % 16 !== 0) {
+               throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+             }
+
+             var plaintext = createArray(ciphertext.length);
+             var block = createArray(16);
+
+             for (var i = 0; i < ciphertext.length; i += 16) {
+               copyArray(ciphertext, block, 0, i, i + 16);
+               block = this._aes.decrypt(block);
+               copyArray(block, plaintext, i);
+             }
+
+             return plaintext;
+           };
+           /**
+            *  Mode Of Operation - Cipher Block Chaining (CBC)
+            */
+
+
+           var ModeOfOperationCBC = function ModeOfOperationCBC(key, iv) {
+             if (!(this instanceof ModeOfOperationCBC)) {
+               throw Error('AES must be instanitated with `new`');
+             }
+
+             this.description = "Cipher Block Chaining";
+             this.name = "cbc";
+
+             if (!iv) {
+               iv = createArray(16);
+             } else if (iv.length != 16) {
+               throw new Error('invalid initialation vector size (must be 16 bytes)');
+             }
+
+             this._lastCipherblock = coerceArray(iv, true);
+             this._aes = new AES(key);
+           };
+
+           ModeOfOperationCBC.prototype.encrypt = function (plaintext) {
+             plaintext = coerceArray(plaintext);
+
+             if (plaintext.length % 16 !== 0) {
+               throw new Error('invalid plaintext size (must be multiple of 16 bytes)');
+             }
+
+             var ciphertext = createArray(plaintext.length);
+             var block = createArray(16);
+
+             for (var i = 0; i < plaintext.length; i += 16) {
+               copyArray(plaintext, block, 0, i, i + 16);
+
+               for (var j = 0; j < 16; j++) {
+                 block[j] ^= this._lastCipherblock[j];
+               }
+
+               this._lastCipherblock = this._aes.encrypt(block);
+               copyArray(this._lastCipherblock, ciphertext, i);
+             }
+
+             return ciphertext;
+           };
+
+           ModeOfOperationCBC.prototype.decrypt = function (ciphertext) {
+             ciphertext = coerceArray(ciphertext);
+
+             if (ciphertext.length % 16 !== 0) {
+               throw new Error('invalid ciphertext size (must be multiple of 16 bytes)');
+             }
+
+             var plaintext = createArray(ciphertext.length);
+             var block = createArray(16);
+
+             for (var i = 0; i < ciphertext.length; i += 16) {
+               copyArray(ciphertext, block, 0, i, i + 16);
+               block = this._aes.decrypt(block);
+
+               for (var j = 0; j < 16; j++) {
+                 plaintext[i + j] = block[j] ^ this._lastCipherblock[j];
+               }
+
+               copyArray(ciphertext, this._lastCipherblock, 0, i, i + 16);
+             }
+
+             return plaintext;
+           };
+           /**
+            *  Mode Of Operation - Cipher Feedback (CFB)
+            */
+
+
+           var ModeOfOperationCFB = function ModeOfOperationCFB(key, iv, segmentSize) {
+             if (!(this instanceof ModeOfOperationCFB)) {
+               throw Error('AES must be instanitated with `new`');
+             }
+
+             this.description = "Cipher Feedback";
+             this.name = "cfb";
+
+             if (!iv) {
+               iv = createArray(16);
+             } else if (iv.length != 16) {
+               throw new Error('invalid initialation vector size (must be 16 size)');
+             }
+
+             if (!segmentSize) {
+               segmentSize = 1;
+             }
+
+             this.segmentSize = segmentSize;
+             this._shiftRegister = coerceArray(iv, true);
+             this._aes = new AES(key);
+           };
+
+           ModeOfOperationCFB.prototype.encrypt = function (plaintext) {
+             if (plaintext.length % this.segmentSize != 0) {
+               throw new Error('invalid plaintext size (must be segmentSize bytes)');
+             }
+
+             var encrypted = coerceArray(plaintext, true);
+             var xorSegment;
+
+             for (var i = 0; i < encrypted.length; i += this.segmentSize) {
+               xorSegment = this._aes.encrypt(this._shiftRegister);
+
+               for (var j = 0; j < this.segmentSize; j++) {
+                 encrypted[i + j] ^= xorSegment[j];
+               } // Shift the register
+
+
+               copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+               copyArray(encrypted, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+             }
+
+             return encrypted;
+           };
+
+           ModeOfOperationCFB.prototype.decrypt = function (ciphertext) {
+             if (ciphertext.length % this.segmentSize != 0) {
+               throw new Error('invalid ciphertext size (must be segmentSize bytes)');
+             }
+
+             var plaintext = coerceArray(ciphertext, true);
+             var xorSegment;
+
+             for (var i = 0; i < plaintext.length; i += this.segmentSize) {
+               xorSegment = this._aes.encrypt(this._shiftRegister);
+
+               for (var j = 0; j < this.segmentSize; j++) {
+                 plaintext[i + j] ^= xorSegment[j];
+               } // Shift the register
+
+
+               copyArray(this._shiftRegister, this._shiftRegister, 0, this.segmentSize);
+               copyArray(ciphertext, this._shiftRegister, 16 - this.segmentSize, i, i + this.segmentSize);
+             }
+
+             return plaintext;
+           };
+           /**
+            *  Mode Of Operation - Output Feedback (OFB)
+            */
+
+
+           var ModeOfOperationOFB = function ModeOfOperationOFB(key, iv) {
+             if (!(this instanceof ModeOfOperationOFB)) {
+               throw Error('AES must be instanitated with `new`');
+             }
+
+             this.description = "Output Feedback";
+             this.name = "ofb";
+
+             if (!iv) {
+               iv = createArray(16);
+             } else if (iv.length != 16) {
+               throw new Error('invalid initialation vector size (must be 16 bytes)');
+             }
+
+             this._lastPrecipher = coerceArray(iv, true);
+             this._lastPrecipherIndex = 16;
+             this._aes = new AES(key);
+           };
+
+           ModeOfOperationOFB.prototype.encrypt = function (plaintext) {
+             var encrypted = coerceArray(plaintext, true);
+
+             for (var i = 0; i < encrypted.length; i++) {
+               if (this._lastPrecipherIndex === 16) {
+                 this._lastPrecipher = this._aes.encrypt(this._lastPrecipher);
+                 this._lastPrecipherIndex = 0;
+               }
+
+               encrypted[i] ^= this._lastPrecipher[this._lastPrecipherIndex++];
+             }
+
+             return encrypted;
+           }; // Decryption is symetric
+
+
+           ModeOfOperationOFB.prototype.decrypt = ModeOfOperationOFB.prototype.encrypt;
+           /**
+            *  Counter object for CTR common mode of operation
+            */
+
+           var Counter = function Counter(initialValue) {
+             if (!(this instanceof Counter)) {
+               throw Error('Counter must be instanitated with `new`');
+             } // We allow 0, but anything false-ish uses the default 1
+
+
+             if (initialValue !== 0 && !initialValue) {
+               initialValue = 1;
+             }
+
+             if (typeof initialValue === 'number') {
+               this._counter = createArray(16);
+               this.setValue(initialValue);
+             } else {
+               this.setBytes(initialValue);
+             }
+           };
+
+           Counter.prototype.setValue = function (value) {
+             if (typeof value !== 'number' || parseInt(value) != value) {
+               throw new Error('invalid counter value (must be an integer)');
+             } // We cannot safely handle numbers beyond the safe range for integers
+
+
+             if (value > Number.MAX_SAFE_INTEGER) {
+               throw new Error('integer value out of safe range');
+             }
+
+             for (var index = 15; index >= 0; --index) {
+               this._counter[index] = value % 256;
+               value = parseInt(value / 256);
+             }
+           };
+
+           Counter.prototype.setBytes = function (bytes) {
+             bytes = coerceArray(bytes, true);
+
+             if (bytes.length != 16) {
+               throw new Error('invalid counter bytes size (must be 16 bytes)');
+             }
+
+             this._counter = bytes;
+           };
+
+           Counter.prototype.increment = function () {
+             for (var i = 15; i >= 0; i--) {
+               if (this._counter[i] === 255) {
+                 this._counter[i] = 0;
+               } else {
+                 this._counter[i]++;
+                 break;
+               }
+             }
+           };
+           /**
+            *  Mode Of Operation - Counter (CTR)
+            */
+
+
+           var ModeOfOperationCTR = function ModeOfOperationCTR(key, counter) {
+             if (!(this instanceof ModeOfOperationCTR)) {
+               throw Error('AES must be instanitated with `new`');
+             }
+
+             this.description = "Counter";
+             this.name = "ctr";
+
+             if (!(counter instanceof Counter)) {
+               counter = new Counter(counter);
+             }
+
+             this._counter = counter;
+             this._remainingCounter = null;
+             this._remainingCounterIndex = 16;
+             this._aes = new AES(key);
+           };
+
+           ModeOfOperationCTR.prototype.encrypt = function (plaintext) {
+             var encrypted = coerceArray(plaintext, true);
+
+             for (var i = 0; i < encrypted.length; i++) {
+               if (this._remainingCounterIndex === 16) {
+                 this._remainingCounter = this._aes.encrypt(this._counter._counter);
+                 this._remainingCounterIndex = 0;
+
+                 this._counter.increment();
+               }
+
+               encrypted[i] ^= this._remainingCounter[this._remainingCounterIndex++];
+             }
+
+             return encrypted;
+           }; // Decryption is symetric
+
+
+           ModeOfOperationCTR.prototype.decrypt = ModeOfOperationCTR.prototype.encrypt; ///////////////////////
+           // Padding
+           // See:https://tools.ietf.org/html/rfc2315
+
+           function pkcs7pad(data) {
+             data = coerceArray(data, true);
+             var padder = 16 - data.length % 16;
+             var result = createArray(data.length + padder);
+             copyArray(data, result);
+
+             for (var i = data.length; i < result.length; i++) {
+               result[i] = padder;
+             }
+
+             return result;
+           }
+
+           function pkcs7strip(data) {
+             data = coerceArray(data, true);
+
+             if (data.length < 16) {
+               throw new Error('PKCS#7 invalid length');
+             }
+
+             var padder = data[data.length - 1];
+
+             if (padder > 16) {
+               throw new Error('PKCS#7 padding byte out of range');
+             }
+
+             var length = data.length - padder;
+
+             for (var i = 0; i < padder; i++) {
+               if (data[length + i] !== padder) {
+                 throw new Error('PKCS#7 invalid padding byte');
+               }
+             }
+
+             var result = createArray(length);
+             copyArray(data, result, 0, 0, length);
+             return result;
+           } ///////////////////////
+           // Exporting
+           // The block cipher
+
+
+           var aesjs = {
+             AES: AES,
+             Counter: Counter,
+             ModeOfOperation: {
+               ecb: ModeOfOperationECB,
+               cbc: ModeOfOperationCBC,
+               cfb: ModeOfOperationCFB,
+               ofb: ModeOfOperationOFB,
+               ctr: ModeOfOperationCTR
+             },
+             utils: {
+               hex: convertHex,
+               utf8: convertUtf8
+             },
+             padding: {
+               pkcs7: {
+                 pad: pkcs7pad,
+                 strip: pkcs7strip
+               }
+             },
+             _arrayTest: {
+               coerceArray: coerceArray,
+               createArray: createArray,
+               copyArray: copyArray
+             }
+           }; // node.js
+
+           {
+             module.exports = aesjs; // RequireJS/AMD
+             // http://www.requirejs.org/docs/api.html
+             // https://github.com/amdjs/amdjs-api/wiki/AMD
+           }
+         })();
+       })(aesJs);
+
+       var aesjs = aesJs.exports;
+
+       // We can use keys that are 128 bits (16 bytes), 192 bits (24 bytes) or 256 bits (32 bytes).
+       // To generate a random key:  window.crypto.getRandomValues(new Uint8Array(16));
+       // This default signing key is built into iD and can be used to mask/unmask sensitive values.
+
+       var DEFAULT_128 = [250, 157, 60, 79, 142, 134, 229, 129, 138, 126, 210, 129, 29, 71, 160, 208];
+       function utilAesEncrypt(text, key) {
+         key = key || DEFAULT_128;
+         var textBytes = aesjs.utils.utf8.toBytes(text);
+         var aesCtr = new aesjs.ModeOfOperation.ctr(key);
+         var encryptedBytes = aesCtr.encrypt(textBytes);
+         var encryptedHex = aesjs.utils.hex.fromBytes(encryptedBytes);
+         return encryptedHex;
+       }
+       function utilAesDecrypt(encryptedHex, key) {
+         key = key || DEFAULT_128;
+         var encryptedBytes = aesjs.utils.hex.toBytes(encryptedHex);
+         var aesCtr = new aesjs.ModeOfOperation.ctr(key);
+         var decryptedBytes = aesCtr.decrypt(encryptedBytes);
+         var text = aesjs.utils.utf8.fromBytes(decryptedBytes);
+         return text;
+       }
+
+       function utilCleanTags(tags) {
+         var out = {};
+
+         for (var k in tags) {
+           if (!k) continue;
+           var v = tags[k];
+
+           if (v !== undefined) {
+             out[k] = cleanValue(k, v);
+           }
+         }
+
+         return out;
+
+         function cleanValue(k, v) {
+           function keepSpaces(k) {
+             return /_hours|_times|:conditional$/.test(k);
+           }
+
+           function skip(k) {
+             return /^(description|note|fixme)$/.test(k);
+           }
+
+           if (skip(k)) return v;
+           var cleaned = v.split(';').map(function (s) {
+             return s.trim();
+           }).join(keepSpaces(k) ? '; ' : ';'); // The code below is not intended to validate websites and emails.
+           // It is only intended to prevent obvious copy-paste errors. (#2323)
+           // clean website- and email-like tags
+
+           if (k.indexOf('website') !== -1 || k.indexOf('email') !== -1 || cleaned.indexOf('http') === 0) {
+             cleaned = cleaned.replace(/[\u200B-\u200F\uFEFF]/g, ''); // strip LRM and other zero width chars
+           }
+
+           return cleaned;
+         }
+       }
+
+       var _detected;
+
+       function utilDetect(refresh) {
+         if (_detected && !refresh) return _detected;
+         _detected = {};
+         var ua = navigator.userAgent;
+         var m = null;
+         /* Browser */
+
+         m = ua.match(/(edge)\/?\s*(\.?\d+(\.\d+)*)/i); // Edge
+
+         if (m !== null) {
+           _detected.browser = m[1];
+           _detected.version = m[2];
+         }
+
+         if (!_detected.browser) {
+           m = ua.match(/Trident\/.*rv:([0-9]{1,}[\.0-9]{0,})/i); // IE11
+
+           if (m !== null) {
+             _detected.browser = 'msie';
+             _detected.version = m[1];
+           }
+         }
+
+         if (!_detected.browser) {
+           m = ua.match(/(opr)\/?\s*(\.?\d+(\.\d+)*)/i); // Opera 15+
+
+           if (m !== null) {
+             _detected.browser = 'Opera';
+             _detected.version = m[2];
+           }
+         }
+
+         if (!_detected.browser) {
+           m = ua.match(/(opera|chrome|safari|firefox|msie)\/?\s*(\.?\d+(\.\d+)*)/i);
+
+           if (m !== null) {
+             _detected.browser = m[1];
+             _detected.version = m[2];
+             m = ua.match(/version\/([\.\d]+)/i);
+             if (m !== null) _detected.version = m[1];
+           }
+         }
+
+         if (!_detected.browser) {
+           _detected.browser = navigator.appName;
+           _detected.version = navigator.appVersion;
+         } // keep major.minor version only..
+
+
+         _detected.version = _detected.version.split(/\W/).slice(0, 2).join('.'); // detect other browser capabilities
+         // Legacy Opera has incomplete svg style support. See #715
+
+         _detected.opera = _detected.browser.toLowerCase() === 'opera' && parseFloat(_detected.version) < 15;
+
+         if (_detected.browser.toLowerCase() === 'msie') {
+           _detected.ie = true;
+           _detected.browser = 'Internet Explorer';
+           _detected.support = parseFloat(_detected.version) >= 11;
+         } else {
+           _detected.ie = false;
+           _detected.support = true;
+         }
+
+         _detected.filedrop = window.FileReader && 'ondrop' in window;
+         _detected.download = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+         _detected.cssfilters = !(_detected.ie || _detected.browser.toLowerCase() === 'edge');
+         /* Platform */
+
+         if (/Win/.test(ua)) {
+           _detected.os = 'win';
+           _detected.platform = 'Windows';
+         } else if (/Mac/.test(ua)) {
+           _detected.os = 'mac';
+           _detected.platform = 'Macintosh';
+         } else if (/X11/.test(ua) || /Linux/.test(ua)) {
+           _detected.os = 'linux';
+           _detected.platform = 'Linux';
+         } else {
+           _detected.os = 'win';
+           _detected.platform = 'Unknown';
+         }
+
+         _detected.isMobileWebKit = (/\b(iPad|iPhone|iPod)\b/.test(ua) || // HACK: iPadOS 13+ requests desktop sites by default by using a Mac user agent,
+         // so assume any "mac" with multitouch is actually iOS
+         navigator.platform === 'MacIntel' && 'maxTouchPoints' in navigator && navigator.maxTouchPoints > 1) && /WebKit/.test(ua) && !/Edge/.test(ua) && !window.MSStream;
+         /* Locale */
+         // An array of locales requested by the browser in priority order.
+
+         _detected.browserLocales = Array.from(new Set( // remove duplicates
+         [navigator.language].concat(navigator.languages || []).concat([// old property for backwards compatibility
+         navigator.userLanguage]) // remove any undefined values
+         .filter(Boolean)));
+         /* Host */
+
+         var loc = window.top.location;
+         var origin = loc.origin;
+
+         if (!origin) {
+           // for unpatched IE11
+           origin = loc.protocol + '//' + loc.hostname + (loc.port ? ':' + loc.port : '');
+         }
+
+         _detected.host = origin + loc.pathname;
+         return _detected;
+       }
+
+       // Like selection.property('value', ...), but avoids no-op value sets,
+       // which can result in layout/repaint thrashing in some situations.
+
+       /** @returns {string} */
+       function utilGetSetValue(selection, value) {
+         function d3_selection_value(value) {
+           function valueNull() {
+             delete this.value;
+           }
+
+           function valueConstant() {
+             if (this.value !== value) {
+               this.value = value;
+             }
+           }
+
+           function valueFunction() {
+             var x = value.apply(this, arguments);
+
+             if (x === null || x === undefined) {
+               delete this.value;
+             } else if (this.value !== x) {
+               this.value = x;
+             }
+           }
+
+           return value === null || value === undefined ? valueNull : typeof value === 'function' ? valueFunction : valueConstant;
+         }
+
+         if (arguments.length === 1) {
+           return selection.property('value');
+         }
+
+         return selection.each(d3_selection_value(value));
+       }
+
+       function utilKeybinding(namespace) {
+         var _keybindings = {};
+
+         function testBindings(d3_event, isCapturing) {
+           var didMatch = false;
+           var bindings = Object.keys(_keybindings).map(function (id) {
+             return _keybindings[id];
+           });
+           var i, binding; // Most key shortcuts will accept either lower or uppercase ('h' or 'H'),
+           // so we don't strictly match on the shift key, but we prioritize
+           // shifted keybindings first, and fallback to unshifted only if no match.
+           // (This lets us differentiate between '←'/'⇧←' or '⌘Z'/'⌘⇧Z')
+           // priority match shifted keybindings first
+
+           for (i = 0; i < bindings.length; i++) {
              binding = bindings[i];
              if (!binding.event.modifiers.shiftKey) continue; // no shift
 
-             if (!!binding.capture !== isCapturing) continue;
+             if (!!binding.capture !== isCapturing) continue;
+
+             if (matches(d3_event, binding, true)) {
+               binding.callback(d3_event);
+               didMatch = true; // match a max of one binding per event
+
+               break;
+             }
+           }
+
+           if (didMatch) return; // then unshifted keybindings
+
+           for (i = 0; i < bindings.length; i++) {
+             binding = bindings[i];
+             if (binding.event.modifiers.shiftKey) continue; // shift
+
+             if (!!binding.capture !== isCapturing) continue;
+
+             if (matches(d3_event, binding, false)) {
+               binding.callback(d3_event);
+               break;
+             }
+           }
+
+           function matches(d3_event, binding, testShift) {
+             var event = d3_event;
+             var isMatch = false;
+             var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`
+
+             if (event.key !== undefined) {
+               tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1
+
+               isMatch = true;
+
+               if (binding.event.key === undefined) {
+                 isMatch = false;
+               } else if (Array.isArray(binding.event.key)) {
+                 if (binding.event.key.map(function (s) {
+                   return s.toLowerCase();
+                 }).indexOf(event.key.toLowerCase()) === -1) {
+                   isMatch = false;
+                 }
+               } else {
+                 if (event.key.toLowerCase() !== binding.event.key.toLowerCase()) {
+                   isMatch = false;
+                 }
+               }
+             } // Fallback match on `KeyboardEvent.keyCode`, can happen if:
+             // - browser doesn't support `KeyboardEvent.key`
+             // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
+
+
+             if (!isMatch && tryKeyCode) {
+               isMatch = event.keyCode === binding.event.keyCode;
+             }
+
+             if (!isMatch) return false; // test modifier keys
+
+             if (!(event.ctrlKey && event.altKey)) {
+               // if both are set, assume AltGr and skip it - #4096
+               if (event.ctrlKey !== binding.event.modifiers.ctrlKey) return false;
+               if (event.altKey !== binding.event.modifiers.altKey) return false;
+             }
+
+             if (event.metaKey !== binding.event.modifiers.metaKey) return false;
+             if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
+             return true;
+           }
+         }
+
+         function capture(d3_event) {
+           testBindings(d3_event, true);
+         }
+
+         function bubble(d3_event) {
+           var tagName = select(d3_event.target).node().tagName;
+
+           if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
+             return;
+           }
+
+           testBindings(d3_event, false);
+         }
+
+         function keybinding(selection) {
+           selection = selection || select(document);
+           selection.on('keydown.capture.' + namespace, capture, true);
+           selection.on('keydown.bubble.' + namespace, bubble, false);
+           return keybinding;
+         } // was: keybinding.off()
+
+
+         keybinding.unbind = function (selection) {
+           _keybindings = [];
+           selection = selection || select(document);
+           selection.on('keydown.capture.' + namespace, null);
+           selection.on('keydown.bubble.' + namespace, null);
+           return keybinding;
+         };
+
+         keybinding.clear = function () {
+           _keybindings = {};
+           return keybinding;
+         }; // Remove one or more keycode bindings.
+
+
+         keybinding.off = function (codes, capture) {
+           var arr = utilArrayUniq([].concat(codes));
+
+           for (var i = 0; i < arr.length; i++) {
+             var id = arr[i] + (capture ? '-capture' : '-bubble');
+             delete _keybindings[id];
+           }
+
+           return keybinding;
+         }; // Add one or more keycode bindings.
+
+
+         keybinding.on = function (codes, callback, capture) {
+           if (typeof callback !== 'function') {
+             return keybinding.off(codes, capture);
+           }
+
+           var arr = utilArrayUniq([].concat(codes));
+
+           for (var i = 0; i < arr.length; i++) {
+             var id = arr[i] + (capture ? '-capture' : '-bubble');
+             var binding = {
+               id: id,
+               capture: capture,
+               callback: callback,
+               event: {
+                 key: undefined,
+                 // preferred
+                 keyCode: 0,
+                 // fallback
+                 modifiers: {
+                   shiftKey: false,
+                   ctrlKey: false,
+                   altKey: false,
+                   metaKey: false
+                 }
+               }
+             };
+
+             if (_keybindings[id]) {
+               console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
+             }
+
+             _keybindings[id] = binding;
+             var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
+
+             for (var j = 0; j < matches.length; j++) {
+               // Normalise matching errors
+               if (matches[j] === '++') matches[j] = '+';
+
+               if (matches[j] in utilKeybinding.modifierCodes) {
+                 var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
+                 binding.event.modifiers[prop] = true;
+               } else {
+                 binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
+
+                 if (matches[j] in utilKeybinding.keyCodes) {
+                   binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
+                 }
+               }
+             }
+           }
+
+           return keybinding;
+         };
+
+         return keybinding;
+       }
+       /*
+        * See https://github.com/keithamus/jwerty
+        */
+
+       utilKeybinding.modifierCodes = {
+         // Shift key, ⇧
+         '⇧': 16,
+         shift: 16,
+         // CTRL key, on Mac: ⌃
+         '⌃': 17,
+         ctrl: 17,
+         // ALT key, on Mac: ⌥ (Alt)
+         '⌥': 18,
+         alt: 18,
+         option: 18,
+         // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
+         '⌘': 91,
+         meta: 91,
+         cmd: 91,
+         'super': 91,
+         win: 91
+       };
+       utilKeybinding.modifierProperties = {
+         16: 'shiftKey',
+         17: 'ctrlKey',
+         18: 'altKey',
+         91: 'metaKey'
+       };
+       utilKeybinding.plusKeys = ['plus', 'ffplus', '=', 'ffequals', '≠', '±'];
+       utilKeybinding.minusKeys = ['_', '-', 'ffminus', 'dash', '–', '—'];
+       utilKeybinding.keys = {
+         // Backspace key, on Mac: ⌫ (Backspace)
+         '⌫': 'Backspace',
+         backspace: 'Backspace',
+         // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+         '⇥': 'Tab',
+         '⇆': 'Tab',
+         tab: 'Tab',
+         // Return key, ↩
+         '↩': 'Enter',
+         '↵': 'Enter',
+         '⏎': 'Enter',
+         'return': 'Enter',
+         enter: 'Enter',
+         '⌅': 'Enter',
+         // Pause/Break key
+         'pause': 'Pause',
+         'pause-break': 'Pause',
+         // Caps Lock key, ⇪
+         '⇪': 'CapsLock',
+         caps: 'CapsLock',
+         'caps-lock': 'CapsLock',
+         // Escape key, on Mac: ⎋, on Windows: Esc
+         '⎋': ['Escape', 'Esc'],
+         escape: ['Escape', 'Esc'],
+         esc: ['Escape', 'Esc'],
+         // Space key
+         space: [' ', 'Spacebar'],
+         // Page-Up key, or pgup, on Mac: ↖
+         '↖': 'PageUp',
+         pgup: 'PageUp',
+         'page-up': 'PageUp',
+         // Page-Down key, or pgdown, on Mac: ↘
+         '↘': 'PageDown',
+         pgdown: 'PageDown',
+         'page-down': 'PageDown',
+         // END key, on Mac: ⇟
+         '⇟': 'End',
+         end: 'End',
+         // HOME key, on Mac: ⇞
+         '⇞': 'Home',
+         home: 'Home',
+         // Insert key, or ins
+         ins: 'Insert',
+         insert: 'Insert',
+         // Delete key, on Mac: ⌦ (Delete)
+         '⌦': ['Delete', 'Del'],
+         del: ['Delete', 'Del'],
+         'delete': ['Delete', 'Del'],
+         // Left Arrow Key, or ←
+         '←': ['ArrowLeft', 'Left'],
+         left: ['ArrowLeft', 'Left'],
+         'arrow-left': ['ArrowLeft', 'Left'],
+         // Up Arrow Key, or ↑
+         '↑': ['ArrowUp', 'Up'],
+         up: ['ArrowUp', 'Up'],
+         'arrow-up': ['ArrowUp', 'Up'],
+         // Right Arrow Key, or →
+         '→': ['ArrowRight', 'Right'],
+         right: ['ArrowRight', 'Right'],
+         'arrow-right': ['ArrowRight', 'Right'],
+         // Up Arrow Key, or ↓
+         '↓': ['ArrowDown', 'Down'],
+         down: ['ArrowDown', 'Down'],
+         'arrow-down': ['ArrowDown', 'Down'],
+         // odities, stuff for backward compatibility (browsers and code):
+         // Num-Multiply, or *
+         '*': ['*', 'Multiply'],
+         star: ['*', 'Multiply'],
+         asterisk: ['*', 'Multiply'],
+         multiply: ['*', 'Multiply'],
+         // Num-Plus or +
+         '+': ['+', 'Add'],
+         'plus': ['+', 'Add'],
+         // Num-Subtract, or -
+         '-': ['-', 'Subtract'],
+         subtract: ['-', 'Subtract'],
+         'dash': ['-', 'Subtract'],
+         // Semicolon
+         semicolon: ';',
+         // = or equals
+         equals: '=',
+         // Comma, or ,
+         comma: ',',
+         // Period, or ., or full-stop
+         period: '.',
+         'full-stop': '.',
+         // Slash, or /, or forward-slash
+         slash: '/',
+         'forward-slash': '/',
+         // Tick, or `, or back-quote
+         tick: '`',
+         'back-quote': '`',
+         // Open bracket, or [
+         'open-bracket': '[',
+         // Back slash, or \
+         'back-slash': '\\',
+         // Close backet, or ]
+         'close-bracket': ']',
+         // Apostrophe, or Quote, or '
+         quote: '\'',
+         apostrophe: '\'',
+         // NUMPAD 0-9
+         'num-0': '0',
+         'num-1': '1',
+         'num-2': '2',
+         'num-3': '3',
+         'num-4': '4',
+         'num-5': '5',
+         'num-6': '6',
+         'num-7': '7',
+         'num-8': '8',
+         'num-9': '9',
+         // F1-F25
+         f1: 'F1',
+         f2: 'F2',
+         f3: 'F3',
+         f4: 'F4',
+         f5: 'F5',
+         f6: 'F6',
+         f7: 'F7',
+         f8: 'F8',
+         f9: 'F9',
+         f10: 'F10',
+         f11: 'F11',
+         f12: 'F12',
+         f13: 'F13',
+         f14: 'F14',
+         f15: 'F15',
+         f16: 'F16',
+         f17: 'F17',
+         f18: 'F18',
+         f19: 'F19',
+         f20: 'F20',
+         f21: 'F21',
+         f22: 'F22',
+         f23: 'F23',
+         f24: 'F24',
+         f25: 'F25'
+       };
+       utilKeybinding.keyCodes = {
+         // Backspace key, on Mac: ⌫ (Backspace)
+         '⌫': 8,
+         backspace: 8,
+         // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
+         '⇥': 9,
+         '⇆': 9,
+         tab: 9,
+         // Return key, ↩
+         '↩': 13,
+         '↵': 13,
+         '⏎': 13,
+         'return': 13,
+         enter: 13,
+         '⌅': 13,
+         // Pause/Break key
+         'pause': 19,
+         'pause-break': 19,
+         // Caps Lock key, ⇪
+         '⇪': 20,
+         caps: 20,
+         'caps-lock': 20,
+         // Escape key, on Mac: ⎋, on Windows: Esc
+         '⎋': 27,
+         escape: 27,
+         esc: 27,
+         // Space key
+         space: 32,
+         // Page-Up key, or pgup, on Mac: ↖
+         '↖': 33,
+         pgup: 33,
+         'page-up': 33,
+         // Page-Down key, or pgdown, on Mac: ↘
+         '↘': 34,
+         pgdown: 34,
+         'page-down': 34,
+         // END key, on Mac: ⇟
+         '⇟': 35,
+         end: 35,
+         // HOME key, on Mac: ⇞
+         '⇞': 36,
+         home: 36,
+         // Insert key, or ins
+         ins: 45,
+         insert: 45,
+         // Delete key, on Mac: ⌦ (Delete)
+         '⌦': 46,
+         del: 46,
+         'delete': 46,
+         // Left Arrow Key, or ←
+         '←': 37,
+         left: 37,
+         'arrow-left': 37,
+         // Up Arrow Key, or ↑
+         '↑': 38,
+         up: 38,
+         'arrow-up': 38,
+         // Right Arrow Key, or →
+         '→': 39,
+         right: 39,
+         'arrow-right': 39,
+         // Up Arrow Key, or ↓
+         '↓': 40,
+         down: 40,
+         'arrow-down': 40,
+         // odities, printing characters that come out wrong:
+         // Firefox Equals
+         'ffequals': 61,
+         // Num-Multiply, or *
+         '*': 106,
+         star: 106,
+         asterisk: 106,
+         multiply: 106,
+         // Num-Plus or +
+         '+': 107,
+         'plus': 107,
+         // Num-Subtract, or -
+         '-': 109,
+         subtract: 109,
+         // Vertical Bar / Pipe
+         '|': 124,
+         // Firefox Plus
+         'ffplus': 171,
+         // Firefox Minus
+         'ffminus': 173,
+         // Semicolon
+         ';': 186,
+         semicolon: 186,
+         // = or equals
+         '=': 187,
+         'equals': 187,
+         // Comma, or ,
+         ',': 188,
+         comma: 188,
+         // Dash / Underscore key
+         'dash': 189,
+         // Period, or ., or full-stop
+         '.': 190,
+         period: 190,
+         'full-stop': 190,
+         // Slash, or /, or forward-slash
+         '/': 191,
+         slash: 191,
+         'forward-slash': 191,
+         // Tick, or `, or back-quote
+         '`': 192,
+         tick: 192,
+         'back-quote': 192,
+         // Open bracket, or [
+         '[': 219,
+         'open-bracket': 219,
+         // Back slash, or \
+         '\\': 220,
+         'back-slash': 220,
+         // Close backet, or ]
+         ']': 221,
+         'close-bracket': 221,
+         // Apostrophe, or Quote, or '
+         '\'': 222,
+         quote: 222,
+         apostrophe: 222
+       }; // NUMPAD 0-9
+
+       var i = 95,
+           n = 0;
+
+       while (++i < 106) {
+         utilKeybinding.keyCodes['num-' + n] = i;
+         ++n;
+       } // 0-9
+
+
+       i = 47;
+       n = 0;
+
+       while (++i < 58) {
+         utilKeybinding.keyCodes[n] = i;
+         ++n;
+       } // F1-F25
+
+
+       i = 111;
+       n = 1;
+
+       while (++i < 136) {
+         utilKeybinding.keyCodes['f' + n] = i;
+         ++n;
+       } // a-z
+
+
+       i = 64;
+
+       while (++i < 91) {
+         utilKeybinding.keyCodes[String.fromCharCode(i).toLowerCase()] = i;
+       }
+
+       function utilObjectOmit(obj, omitKeys) {
+         return Object.keys(obj).reduce(function (result, key) {
+           if (omitKeys.indexOf(key) === -1) {
+             result[key] = obj[key]; // keep
+           }
+
+           return result;
+         }, {});
+       }
+
+       // Copies a variable number of methods from source to target.
+       function utilRebind(target, source) {
+         var i = 1,
+             n = arguments.length,
+             method;
+
+         while (++i < n) {
+           target[method = arguments[i]] = d3_rebind(target, source, source[method]);
+         }
+
+         return target;
+       } // Method is assumed to be a standard D3 getter-setter:
+       // If passed with no arguments, gets the value.
+       // If passed with arguments, sets the value and returns the target.
+
+       function d3_rebind(target, source, method) {
+         return function () {
+           var value = method.apply(source, arguments);
+           return value === source ? target : value;
+         };
+       }
+
+       // A per-domain session mutex backed by a cookie and dead man's
+       // switch. If the session crashes, the mutex will auto-release
+       // after 5 seconds.
+       // This accepts a string and returns an object that complies with utilSessionMutexType
+       function utilSessionMutex(name) {
+         var mutex = {};
+         var intervalID;
+
+         function renew() {
+           var expires = new Date();
+           expires.setSeconds(expires.getSeconds() + 5);
+           document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
+         }
+
+         mutex.lock = function () {
+           if (intervalID) return true;
+           var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
+           if (cookie) return false;
+           renew();
+           intervalID = window.setInterval(renew, 4000);
+           return true;
+         };
+
+         mutex.unlock = function () {
+           if (!intervalID) return;
+           document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
+           clearInterval(intervalID);
+           intervalID = null;
+         };
+
+         mutex.locked = function () {
+           return !!intervalID;
+         };
+
+         return mutex;
+       }
+
+       function utilTiler() {
+         var _size = [256, 256];
+         var _scale = 256;
+         var _tileSize = 256;
+         var _zoomExtent = [0, 20];
+         var _translate = [_size[0] / 2, _size[1] / 2];
+         var _margin = 0;
+         var _skipNullIsland = false;
+
+         function clamp(num, min, max) {
+           return Math.max(min, Math.min(num, max));
+         }
+
+         function nearNullIsland(tile) {
+           var x = tile[0];
+           var y = tile[1];
+           var z = tile[2];
+
+           if (z >= 7) {
+             var center = Math.pow(2, z - 1);
+             var width = Math.pow(2, z - 6);
+             var min = center - width / 2;
+             var max = center + width / 2 - 1;
+             return x >= min && x <= max && y >= min && y <= max;
+           }
+
+           return false;
+         }
+
+         function tiler() {
+           var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
+           var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
+           var tileMin = 0;
+           var tileMax = Math.pow(2, z0) - 1;
+           var log2ts = Math.log(_tileSize) * Math.LOG2E;
+           var k = Math.pow(2, z - z0 + log2ts);
+           var origin = [(_translate[0] - _scale / 2) / k, (_translate[1] - _scale / 2) / k];
+           var cols = range$1(clamp(Math.floor(-origin[0]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[0] / k - origin[0]) + _margin, tileMin, tileMax + 1));
+           var rows = range$1(clamp(Math.floor(-origin[1]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[1] / k - origin[1]) + _margin, tileMin, tileMax + 1));
+           var tiles = [];
+
+           for (var i = 0; i < rows.length; i++) {
+             var y = rows[i];
+
+             for (var j = 0; j < cols.length; j++) {
+               var x = cols[j];
+
+               if (i >= _margin && i <= rows.length - _margin && j >= _margin && j <= cols.length - _margin) {
+                 tiles.unshift([x, y, z0]); // tiles in view at beginning
+               } else {
+                 tiles.push([x, y, z0]); // tiles in margin at the end
+               }
+             }
+           }
+
+           tiles.translate = origin;
+           tiles.scale = k;
+           return tiles;
+         }
+         /**
+          * getTiles() returns an array of tiles that cover the map view
+          */
+
+
+         tiler.getTiles = function (projection) {
+           var origin = [projection.scale() * Math.PI - projection.translate()[0], projection.scale() * Math.PI - projection.translate()[1]];
+           this.size(projection.clipExtent()[1]).scale(projection.scale() * 2 * Math.PI).translate(projection.translate());
+           var tiles = tiler();
+           var ts = tiles.scale;
+           return tiles.map(function (tile) {
+             if (_skipNullIsland && nearNullIsland(tile)) {
+               return false;
+             }
+
+             var x = tile[0] * ts - origin[0];
+             var y = tile[1] * ts - origin[1];
+             return {
+               id: tile.toString(),
+               xyz: tile,
+               extent: geoExtent(projection.invert([x, y + ts]), projection.invert([x + ts, y]))
+             };
+           }).filter(Boolean);
+         };
+         /**
+          * getGeoJSON() returns a FeatureCollection for debugging tiles
+          */
+
+
+         tiler.getGeoJSON = function (projection) {
+           var features = tiler.getTiles(projection).map(function (tile) {
+             return {
+               type: 'Feature',
+               properties: {
+                 id: tile.id,
+                 name: tile.id
+               },
+               geometry: {
+                 type: 'Polygon',
+                 coordinates: [tile.extent.polygon()]
+               }
+             };
+           });
+           return {
+             type: 'FeatureCollection',
+             features: features
+           };
+         };
+
+         tiler.tileSize = function (val) {
+           if (!arguments.length) return _tileSize;
+           _tileSize = val;
+           return tiler;
+         };
+
+         tiler.zoomExtent = function (val) {
+           if (!arguments.length) return _zoomExtent;
+           _zoomExtent = val;
+           return tiler;
+         };
+
+         tiler.size = function (val) {
+           if (!arguments.length) return _size;
+           _size = val;
+           return tiler;
+         };
+
+         tiler.scale = function (val) {
+           if (!arguments.length) return _scale;
+           _scale = val;
+           return tiler;
+         };
+
+         tiler.translate = function (val) {
+           if (!arguments.length) return _translate;
+           _translate = val;
+           return tiler;
+         }; // number to extend the rows/columns beyond those covering the viewport
+
+
+         tiler.margin = function (val) {
+           if (!arguments.length) return _margin;
+           _margin = +val;
+           return tiler;
+         };
+
+         tiler.skipNullIsland = function (val) {
+           if (!arguments.length) return _skipNullIsland;
+           _skipNullIsland = val;
+           return tiler;
+         };
+
+         return tiler;
+       }
+
+       function utilTriggerEvent(target, type) {
+         target.each(function () {
+           var evt = document.createEvent('HTMLEvents');
+           evt.initEvent(type, true, true);
+           this.dispatchEvent(evt);
+         });
+       }
+
+       var _mainLocations = coreLocations(); // singleton
+       // `coreLocations` maintains an internal index of all the boundaries/geofences used by iD.
+       // It's used by presets, community index, background imagery, to know where in the world these things are valid.
+       // These geofences should be defined by `locationSet` objects:
+       //
+       // let locationSet = {
+       //   include: [ Array of locations ],
+       //   exclude: [ Array of locations ]
+       // };
+       //
+       // For more info see the location-conflation and country-coder projects, see:
+       // https://github.com/ideditor/location-conflation
+       // https://github.com/ideditor/country-coder
+       //
+
+       function coreLocations() {
+         var _this = {};
+         var _resolvedFeatures = {}; // cache of *resolved* locationSet features
+
+         var _loco = new _default(); // instance of a location-conflation resolver
+
+
+         var _wp; // instance of a which-polygon index
+         // pre-resolve the worldwide locationSet
+
+
+         var world = {
+           locationSet: {
+             include: ['Q2']
+           }
+         };
+         resolveLocationSet(world);
+         rebuildIndex();
+         var _queue = [];
+
+         var _deferred = new Set();
+
+         var _inProcess; // Returns a Promise to process the queue
+
+
+         function processQueue() {
+           if (!_queue.length) return Promise.resolve(); // console.log(`queue length ${_queue.length}`);
+
+           var chunk = _queue.pop();
+
+           return new Promise(function (resolvePromise) {
+             var handle = window.requestIdleCallback(function () {
+               _deferred["delete"](handle); // const t0 = performance.now();
+
+
+               chunk.forEach(resolveLocationSet); // const t1 = performance.now();
+               // console.log('chunk processed in ' + (t1 - t0) + ' ms');
+
+               resolvePromise();
+             });
+
+             _deferred.add(handle);
+           }).then(function () {
+             return processQueue();
+           });
+         } // Pass an Object with a `locationSet` property,
+         // Performs the locationSet resolution, caches the result, and sets a `locationSetID` property on the object.
+
+
+         function resolveLocationSet(obj) {
+           if (obj.locationSetID) return; // work was done already
+
+           try {
+             var locationSet = obj.locationSet;
+
+             if (!locationSet) {
+               throw new Error('object missing locationSet property');
+             }
+
+             if (!locationSet.include) {
+               // missing `include`, default to worldwide include
+               locationSet.include = ['Q2']; // https://github.com/openstreetmap/iD/pull/8305#discussion_r662344647
+             }
+
+             var resolved = _loco.resolveLocationSet(locationSet);
+
+             var locationSetID = resolved.id;
+             obj.locationSetID = locationSetID;
+
+             if (!resolved.feature.geometry.coordinates.length || !resolved.feature.properties.area) {
+               throw new Error("locationSet ".concat(locationSetID, " resolves to an empty feature."));
+             }
+
+             if (!_resolvedFeatures[locationSetID]) {
+               // First time seeing this locationSet feature
+               var feature = JSON.parse(JSON.stringify(resolved.feature)); // deep clone
+
+               feature.id = locationSetID; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
+
+               feature.properties.id = locationSetID;
+               _resolvedFeatures[locationSetID] = feature; // insert into cache
+             }
+           } catch (err) {
+             obj.locationSet = {
+               include: ['Q2']
+             }; // default worldwide
+
+             obj.locationSetID = '+[Q2]';
+           }
+         } // Rebuilds the whichPolygon index with whatever features have been resolved.
+
+
+         function rebuildIndex() {
+           _wp = whichPolygon_1({
+             features: Object.values(_resolvedFeatures)
+           });
+         } //
+         // `mergeCustomGeoJSON`
+         //  Accepts an FeatureCollection-like object containing custom locations
+         //  Each feature must have a filename-like `id`, for example: `something.geojson`
+         //
+         //  {
+         //    "type": "FeatureCollection"
+         //    "features": [
+         //      {
+         //        "type": "Feature",
+         //        "id": "philly_metro.geojson",
+         //        "properties": { … },
+         //        "geometry": { … }
+         //      }
+         //    ]
+         //  }
+         //
+
+
+         _this.mergeCustomGeoJSON = function (fc) {
+           if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
+             fc.features.forEach(function (feature) {
+               feature.properties = feature.properties || {};
+               var props = feature.properties; // Get `id` from either `id` or `properties`
+
+               var id = feature.id || props.id;
+               if (!id || !/^\S+\.geojson$/i.test(id)) return; // Ensure `id` exists and is lowercase
+
+               id = id.toLowerCase();
+               feature.id = id;
+               props.id = id; // Ensure `area` property exists
+
+               if (!props.area) {
+                 var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
+
+                 props.area = Number(area.toFixed(2));
+               }
+
+               _loco._cache[id] = feature;
+             });
+           }
+         }; //
+         // `mergeLocationSets`
+         //  Accepts an Array of Objects containing `locationSet` properties.
+         //  The locationSets will be resolved and indexed in the background.
+         //  [
+         //   { id: 'preset1', locationSet: {…} },
+         //   { id: 'preset2', locationSet: {…} },
+         //   { id: 'preset3', locationSet: {…} },
+         //   …
+         //  ]
+         //  After resolving and indexing, the Objects will be decorated with a
+         //  `locationSetID` property.
+         //  [
+         //   { id: 'preset1', locationSet: {…}, locationSetID: '+[Q2]' },
+         //   { id: 'preset2', locationSet: {…}, locationSetID: '+[Q30]' },
+         //   { id: 'preset3', locationSet: {…}, locationSetID: '+[Q2]' },
+         //   …
+         //  ]
+         //
+         //  Returns a Promise fulfilled when the resolving/indexing has been completed
+         //  This will take some seconds but happen in the background during browser idle time.
+         //
+
+
+         _this.mergeLocationSets = function (objects) {
+           if (!Array.isArray(objects)) return Promise.reject('nothing to do'); // Resolve all locationSets -> geojson, processing data in chunks
+           //
+           // Because this will happen during idle callbacks, we want to choose a chunk size
+           // that won't make the browser stutter too badly.  LocationSets that are a simple
+           // country coder include will resolve instantly, but ones that involve complex
+           // include/exclude operations will take some milliseconds longer.
+           //
+           // Some discussion and performance results on these tickets:
+           // https://github.com/ideditor/location-conflation/issues/26
+           // https://github.com/osmlab/name-suggestion-index/issues/4784#issuecomment-742003434
+
+           _queue = _queue.concat(utilArrayChunk(objects, 200));
+
+           if (!_inProcess) {
+             _inProcess = processQueue().then(function () {
+               rebuildIndex();
+               _inProcess = null;
+               return objects;
+             });
+           }
+
+           return _inProcess;
+         }; //
+         // `locationSetID`
+         // Returns a locationSetID for a given locationSet (fallback to `+[Q2]`, world)
+         // (The locationset doesn't necessarily need to be resolved to compute its `id`)
+         //
+         // Arguments
+         //   `locationSet`: A locationSet, e.g. `{ include: ['us'] }`
+         // Returns
+         //   The locationSetID, e.g. `+[Q30]`
+         //
+
+
+         _this.locationSetID = function (locationSet) {
+           var locationSetID;
+
+           try {
+             locationSetID = _loco.validateLocationSet(locationSet).id;
+           } catch (err) {
+             locationSetID = '+[Q2]'; // the world
+           }
+
+           return locationSetID;
+         }; //
+         // `feature`
+         // Returns the resolved GeoJSON feature for a given locationSetID (fallback to 'world')
+         //
+         // Arguments
+         //   `locationSetID`: id of the form like `+[Q30]`  (United States)
+         // Returns
+         //   A GeoJSON feature:
+         //   {
+         //     type: 'Feature',
+         //     id: '+[Q30]',
+         //     properties: { id: '+[Q30]', area: 21817019.17, … },
+         //     geometry: { … }
+         //   }
+
+
+         _this.feature = function (locationSetID) {
+           return _resolvedFeatures[locationSetID] || _resolvedFeatures['+[Q2]'];
+         }; //
+         // `locationsAt`
+         // Find all the resolved locationSets valid at the given location.
+         // Results include the area (in km²) to facilitate sorting.
+         //
+         // Arguments
+         //   `loc`: the [lon,lat] location to query, e.g. `[-74.4813, 40.7967]`
+         // Returns
+         //   Object of locationSetIDs to areas (in km²)
+         //   {
+         //     "+[Q2]": 511207893.3958111,
+         //     "+[Q30]": 21817019.17,
+         //     "+[new_jersey.geojson]": 22390.77,
+         //     …
+         //   }
+         //
+
+
+         _this.locationsAt = function (loc) {
+           var result = {};
+           (_wp(loc, true) || []).forEach(function (prop) {
+             return result[prop.id] = prop.area;
+           });
+           return result;
+         }; //
+         // `query`
+         // Execute a query directly against which-polygon
+         // https://github.com/mapbox/which-polygon
+         //
+         // Arguments
+         //   `loc`: the [lon,lat] location to query,
+         //   `multi`: `true` to return all results, `false` to return first result
+         // Returns
+         //   Array of GeoJSON *properties* for the locationSet features that exist at `loc`
+         //
+
+
+         _this.query = function (loc, multi) {
+           return _wp(loc, multi);
+         }; // Direct access to the location-conflation resolver
+
+
+         _this.loco = function () {
+           return _loco;
+         }; // Direct access to the which-polygon index
+
+
+         _this.wp = function () {
+           return _wp;
+         };
+
+         return _this;
+       }
+
+       var $$h = _export;
+       var $findIndex = arrayIteration.findIndex;
+       var addToUnscopables$1 = addToUnscopables$6;
+
+       var FIND_INDEX = 'findIndex';
+       var SKIPS_HOLES = true;
+
+       // Shouldn't skip holes
+       if (FIND_INDEX in []) Array(1)[FIND_INDEX](function () { SKIPS_HOLES = false; });
+
+       // `Array.prototype.findIndex` method
+       // https://tc39.es/ecma262/#sec-array.prototype.findindex
+       $$h({ target: 'Array', proto: true, forced: SKIPS_HOLES }, {
+         findIndex: function findIndex(callbackfn /* , that = undefined */) {
+           return $findIndex(this, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });
+
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables$1(FIND_INDEX);
+
+       var global$5 = global$1m;
+       var isRegExp = isRegexp;
+
+       var TypeError$3 = global$5.TypeError;
+
+       var notARegexp = function (it) {
+         if (isRegExp(it)) {
+           throw TypeError$3("The method doesn't accept regular expressions");
+         } return it;
+       };
+
+       var wellKnownSymbol = wellKnownSymbol$t;
+
+       var MATCH = wellKnownSymbol('match');
+
+       var correctIsRegexpLogic = function (METHOD_NAME) {
+         var regexp = /./;
+         try {
+           '/./'[METHOD_NAME](regexp);
+         } catch (error1) {
+           try {
+             regexp[MATCH] = false;
+             return '/./'[METHOD_NAME](regexp);
+           } catch (error2) { /* empty */ }
+         } return false;
+       };
+
+       var $$g = _export;
+       var uncurryThis$7 = functionUncurryThis;
+       var notARegExp$2 = notARegexp;
+       var requireObjectCoercible$3 = requireObjectCoercible$e;
+       var toString$4 = toString$k;
+       var correctIsRegExpLogic$2 = correctIsRegexpLogic;
+
+       var stringIndexOf = uncurryThis$7(''.indexOf);
+
+       // `String.prototype.includes` method
+       // https://tc39.es/ecma262/#sec-string.prototype.includes
+       $$g({ target: 'String', proto: true, forced: !correctIsRegExpLogic$2('includes') }, {
+         includes: function includes(searchString /* , position = 0 */) {
+           return !!~stringIndexOf(
+             toString$4(requireObjectCoercible$3(this)),
+             toString$4(notARegExp$2(searchString)),
+             arguments.length > 1 ? arguments[1] : undefined
+           );
+         }
+       });
+
+       /** Detect free variable `global` from Node.js. */
+       var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
+
+       /** Detect free variable `self`. */
+
+       var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+       /** Used as a reference to the global object. */
+
+       var root = freeGlobal || freeSelf || Function('return this')();
+
+       /** Built-in value references. */
+
+       var _Symbol = root.Symbol;
+
+       /** Used for built-in method references. */
+
+       var objectProto$1 = Object.prototype;
+       /** Used to check objects for own properties. */
+
+       var hasOwnProperty$2 = objectProto$1.hasOwnProperty;
+       /**
+        * Used to resolve the
+        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+        * of values.
+        */
+
+       var nativeObjectToString$1 = objectProto$1.toString;
+       /** Built-in value references. */
+
+       var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;
+       /**
+        * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+        *
+        * @private
+        * @param {*} value The value to query.
+        * @returns {string} Returns the raw `toStringTag`.
+        */
+
+       function getRawTag(value) {
+         var isOwn = hasOwnProperty$2.call(value, symToStringTag$1),
+             tag = value[symToStringTag$1];
+
+         try {
+           value[symToStringTag$1] = undefined;
+           var unmasked = true;
+         } catch (e) {}
+
+         var result = nativeObjectToString$1.call(value);
+
+         if (unmasked) {
+           if (isOwn) {
+             value[symToStringTag$1] = tag;
+           } else {
+             delete value[symToStringTag$1];
+           }
+         }
+
+         return result;
+       }
+
+       /** Used for built-in method references. */
+       var objectProto = Object.prototype;
+       /**
+        * Used to resolve the
+        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+        * of values.
+        */
+
+       var nativeObjectToString = objectProto.toString;
+       /**
+        * Converts `value` to a string using `Object.prototype.toString`.
+        *
+        * @private
+        * @param {*} value The value to convert.
+        * @returns {string} Returns the converted string.
+        */
+
+       function objectToString(value) {
+         return nativeObjectToString.call(value);
+       }
+
+       /** `Object#toString` result references. */
+
+       var nullTag = '[object Null]',
+           undefinedTag = '[object Undefined]';
+       /** Built-in value references. */
+
+       var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;
+       /**
+        * The base implementation of `getTag` without fallbacks for buggy environments.
+        *
+        * @private
+        * @param {*} value The value to query.
+        * @returns {string} Returns the `toStringTag`.
+        */
+
+       function baseGetTag(value) {
+         if (value == null) {
+           return value === undefined ? undefinedTag : nullTag;
+         }
+
+         return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
+       }
+
+       /**
+        * Checks if `value` is object-like. A value is object-like if it's not `null`
+        * and has a `typeof` result of "object".
+        *
+        * @static
+        * @memberOf _
+        * @since 4.0.0
+        * @category Lang
+        * @param {*} value The value to check.
+        * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+        * @example
+        *
+        * _.isObjectLike({});
+        * // => true
+        *
+        * _.isObjectLike([1, 2, 3]);
+        * // => true
+        *
+        * _.isObjectLike(_.noop);
+        * // => false
+        *
+        * _.isObjectLike(null);
+        * // => false
+        */
+       function isObjectLike(value) {
+         return value != null && _typeof(value) == 'object';
+       }
+
+       /** `Object#toString` result references. */
+
+       var symbolTag = '[object Symbol]';
+       /**
+        * Checks if `value` is classified as a `Symbol` primitive or object.
+        *
+        * @static
+        * @memberOf _
+        * @since 4.0.0
+        * @category Lang
+        * @param {*} value The value to check.
+        * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+        * @example
+        *
+        * _.isSymbol(Symbol.iterator);
+        * // => true
+        *
+        * _.isSymbol('abc');
+        * // => false
+        */
+
+       function isSymbol(value) {
+         return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+       }
+
+       /**
+        * A specialized version of `_.map` for arrays without support for iteratee
+        * shorthands.
+        *
+        * @private
+        * @param {Array} [array] The array to iterate over.
+        * @param {Function} iteratee The function invoked per iteration.
+        * @returns {Array} Returns the new mapped array.
+        */
+       function arrayMap(array, iteratee) {
+         var index = -1,
+             length = array == null ? 0 : array.length,
+             result = Array(length);
+
+         while (++index < length) {
+           result[index] = iteratee(array[index], index, array);
+         }
+
+         return result;
+       }
+
+       /**
+        * Checks if `value` is classified as an `Array` object.
+        *
+        * @static
+        * @memberOf _
+        * @since 0.1.0
+        * @category Lang
+        * @param {*} value The value to check.
+        * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+        * @example
+        *
+        * _.isArray([1, 2, 3]);
+        * // => true
+        *
+        * _.isArray(document.body.children);
+        * // => false
+        *
+        * _.isArray('abc');
+        * // => false
+        *
+        * _.isArray(_.noop);
+        * // => false
+        */
+       var isArray$1 = Array.isArray;
+
+       /** Used as references for various `Number` constants. */
+
+       var INFINITY = 1 / 0;
+       /** Used to convert symbols to primitives and strings. */
+
+       var symbolProto = _Symbol ? _Symbol.prototype : undefined,
+           symbolToString = symbolProto ? symbolProto.toString : undefined;
+       /**
+        * The base implementation of `_.toString` which doesn't convert nullish
+        * values to empty strings.
+        *
+        * @private
+        * @param {*} value The value to process.
+        * @returns {string} Returns the string.
+        */
+
+       function baseToString(value) {
+         // Exit early for strings to avoid a performance hit in some environments.
+         if (typeof value == 'string') {
+           return value;
+         }
+
+         if (isArray$1(value)) {
+           // Recursively convert values (susceptible to call stack limits).
+           return arrayMap(value, baseToString) + '';
+         }
+
+         if (isSymbol(value)) {
+           return symbolToString ? symbolToString.call(value) : '';
+         }
+
+         var result = value + '';
+         return result == '0' && 1 / value == -INFINITY ? '-0' : result;
+       }
+
+       /** Used to match a single whitespace character. */
+       var reWhitespace = /\s/;
+       /**
+        * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
+        * character of `string`.
+        *
+        * @private
+        * @param {string} string The string to inspect.
+        * @returns {number} Returns the index of the last non-whitespace character.
+        */
+
+       function trimmedEndIndex(string) {
+         var index = string.length;
+
+         while (index-- && reWhitespace.test(string.charAt(index))) {}
+
+         return index;
+       }
+
+       /** Used to match leading whitespace. */
+
+       var reTrimStart = /^\s+/;
+       /**
+        * The base implementation of `_.trim`.
+        *
+        * @private
+        * @param {string} string The string to trim.
+        * @returns {string} Returns the trimmed string.
+        */
+
+       function baseTrim(string) {
+         return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
+       }
+
+       /**
+        * Checks if `value` is the
+        * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+        * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+        *
+        * @static
+        * @memberOf _
+        * @since 0.1.0
+        * @category Lang
+        * @param {*} value The value to check.
+        * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+        * @example
+        *
+        * _.isObject({});
+        * // => true
+        *
+        * _.isObject([1, 2, 3]);
+        * // => true
+        *
+        * _.isObject(_.noop);
+        * // => true
+        *
+        * _.isObject(null);
+        * // => false
+        */
+       function isObject$2(value) {
+         var type = _typeof(value);
+
+         return value != null && (type == 'object' || type == 'function');
+       }
+
+       /** Used as references for various `Number` constants. */
+
+       var NAN = 0 / 0;
+       /** Used to detect bad signed hexadecimal string values. */
+
+       var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+       /** Used to detect binary string values. */
+
+       var reIsBinary = /^0b[01]+$/i;
+       /** Used to detect octal string values. */
+
+       var reIsOctal = /^0o[0-7]+$/i;
+       /** Built-in method references without a dependency on `root`. */
+
+       var freeParseInt = parseInt;
+       /**
+        * Converts `value` to a number.
+        *
+        * @static
+        * @memberOf _
+        * @since 4.0.0
+        * @category Lang
+        * @param {*} value The value to process.
+        * @returns {number} Returns the number.
+        * @example
+        *
+        * _.toNumber(3.2);
+        * // => 3.2
+        *
+        * _.toNumber(Number.MIN_VALUE);
+        * // => 5e-324
+        *
+        * _.toNumber(Infinity);
+        * // => Infinity
+        *
+        * _.toNumber('3.2');
+        * // => 3.2
+        */
+
+       function toNumber(value) {
+         if (typeof value == 'number') {
+           return value;
+         }
+
+         if (isSymbol(value)) {
+           return NAN;
+         }
+
+         if (isObject$2(value)) {
+           var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+           value = isObject$2(other) ? other + '' : other;
+         }
+
+         if (typeof value != 'string') {
+           return value === 0 ? value : +value;
+         }
+
+         value = baseTrim(value);
+         var isBinary = reIsBinary.test(value);
+         return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
+       }
+
+       /**
+        * Converts `value` to a string. An empty string is returned for `null`
+        * and `undefined` values. The sign of `-0` is preserved.
+        *
+        * @static
+        * @memberOf _
+        * @since 4.0.0
+        * @category Lang
+        * @param {*} value The value to convert.
+        * @returns {string} Returns the converted string.
+        * @example
+        *
+        * _.toString(null);
+        * // => ''
+        *
+        * _.toString(-0);
+        * // => '-0'
+        *
+        * _.toString([1, 2, 3]);
+        * // => '1,2,3'
+        */
+
+       function toString$3(value) {
+         return value == null ? '' : baseToString(value);
+       }
+
+       /**
+        * The base implementation of `_.propertyOf` without support for deep paths.
+        *
+        * @private
+        * @param {Object} object The object to query.
+        * @returns {Function} Returns the new accessor function.
+        */
+       function basePropertyOf(object) {
+         return function (key) {
+           return object == null ? undefined : object[key];
+         };
+       }
+
+       /**
+        * Gets the timestamp of the number of milliseconds that have elapsed since
+        * the Unix epoch (1 January 1970 00:00:00 UTC).
+        *
+        * @static
+        * @memberOf _
+        * @since 2.4.0
+        * @category Date
+        * @returns {number} Returns the timestamp.
+        * @example
+        *
+        * _.defer(function(stamp) {
+        *   console.log(_.now() - stamp);
+        * }, _.now());
+        * // => Logs the number of milliseconds it took for the deferred invocation.
+        */
+
+       var now = function now() {
+         return root.Date.now();
+       };
+
+       /** Error message constants. */
+
+       var FUNC_ERROR_TEXT$1 = 'Expected a function';
+       /* Built-in method references for those with the same name as other `lodash` methods. */
+
+       var nativeMax = Math.max,
+           nativeMin = Math.min;
+       /**
+        * Creates a debounced function that delays invoking `func` until after `wait`
+        * milliseconds have elapsed since the last time the debounced function was
+        * invoked. The debounced function comes with a `cancel` method to cancel
+        * delayed `func` invocations and a `flush` method to immediately invoke them.
+        * Provide `options` to indicate whether `func` should be invoked on the
+        * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+        * with the last arguments provided to the debounced function. Subsequent
+        * calls to the debounced function return the result of the last `func`
+        * invocation.
+        *
+        * **Note:** If `leading` and `trailing` options are `true`, `func` is
+        * invoked on the trailing edge of the timeout only if the debounced function
+        * is invoked more than once during the `wait` timeout.
+        *
+        * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+        * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+        *
+        * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+        * for details over the differences between `_.debounce` and `_.throttle`.
+        *
+        * @static
+        * @memberOf _
+        * @since 0.1.0
+        * @category Function
+        * @param {Function} func The function to debounce.
+        * @param {number} [wait=0] The number of milliseconds to delay.
+        * @param {Object} [options={}] The options object.
+        * @param {boolean} [options.leading=false]
+        *  Specify invoking on the leading edge of the timeout.
+        * @param {number} [options.maxWait]
+        *  The maximum time `func` is allowed to be delayed before it's invoked.
+        * @param {boolean} [options.trailing=true]
+        *  Specify invoking on the trailing edge of the timeout.
+        * @returns {Function} Returns the new debounced function.
+        * @example
+        *
+        * // Avoid costly calculations while the window size is in flux.
+        * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
+        *
+        * // Invoke `sendMail` when clicked, debouncing subsequent calls.
+        * jQuery(element).on('click', _.debounce(sendMail, 300, {
+        *   'leading': true,
+        *   'trailing': false
+        * }));
+        *
+        * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
+        * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
+        * var source = new EventSource('/stream');
+        * jQuery(source).on('message', debounced);
+        *
+        * // Cancel the trailing debounced invocation.
+        * jQuery(window).on('popstate', debounced.cancel);
+        */
+
+       function debounce(func, wait, options) {
+         var lastArgs,
+             lastThis,
+             maxWait,
+             result,
+             timerId,
+             lastCallTime,
+             lastInvokeTime = 0,
+             leading = false,
+             maxing = false,
+             trailing = true;
+
+         if (typeof func != 'function') {
+           throw new TypeError(FUNC_ERROR_TEXT$1);
+         }
+
+         wait = toNumber(wait) || 0;
+
+         if (isObject$2(options)) {
+           leading = !!options.leading;
+           maxing = 'maxWait' in options;
+           maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
+           trailing = 'trailing' in options ? !!options.trailing : trailing;
+         }
+
+         function invokeFunc(time) {
+           var args = lastArgs,
+               thisArg = lastThis;
+           lastArgs = lastThis = undefined;
+           lastInvokeTime = time;
+           result = func.apply(thisArg, args);
+           return result;
+         }
+
+         function leadingEdge(time) {
+           // Reset any `maxWait` timer.
+           lastInvokeTime = time; // Start the timer for the trailing edge.
+
+           timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
+
+           return leading ? invokeFunc(time) : result;
+         }
+
+         function remainingWait(time) {
+           var timeSinceLastCall = time - lastCallTime,
+               timeSinceLastInvoke = time - lastInvokeTime,
+               timeWaiting = wait - timeSinceLastCall;
+           return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+         }
+
+         function shouldInvoke(time) {
+           var timeSinceLastCall = time - lastCallTime,
+               timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
+           // trailing edge, the system time has gone backwards and we're treating
+           // it as the trailing edge, or we've hit the `maxWait` limit.
+
+           return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+         }
+
+         function timerExpired() {
+           var time = now();
+
+           if (shouldInvoke(time)) {
+             return trailingEdge(time);
+           } // Restart the timer.
+
+
+           timerId = setTimeout(timerExpired, remainingWait(time));
+         }
+
+         function trailingEdge(time) {
+           timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
+           // debounced at least once.
+
+           if (trailing && lastArgs) {
+             return invokeFunc(time);
+           }
+
+           lastArgs = lastThis = undefined;
+           return result;
+         }
+
+         function cancel() {
+           if (timerId !== undefined) {
+             clearTimeout(timerId);
+           }
+
+           lastInvokeTime = 0;
+           lastArgs = lastCallTime = lastThis = timerId = undefined;
+         }
+
+         function flush() {
+           return timerId === undefined ? result : trailingEdge(now());
+         }
+
+         function debounced() {
+           var time = now(),
+               isInvoking = shouldInvoke(time);
+           lastArgs = arguments;
+           lastThis = this;
+           lastCallTime = time;
+
+           if (isInvoking) {
+             if (timerId === undefined) {
+               return leadingEdge(lastCallTime);
+             }
+
+             if (maxing) {
+               // Handle invocations in a tight loop.
+               clearTimeout(timerId);
+               timerId = setTimeout(timerExpired, wait);
+               return invokeFunc(lastCallTime);
+             }
+           }
+
+           if (timerId === undefined) {
+             timerId = setTimeout(timerExpired, wait);
+           }
+
+           return result;
+         }
+
+         debounced.cancel = cancel;
+         debounced.flush = flush;
+         return debounced;
+       }
+
+       /** Used to map characters to HTML entities. */
+
+       var htmlEscapes = {
+         '&': '&amp;',
+         '<': '&lt;',
+         '>': '&gt;',
+         '"': '&quot;',
+         "'": '&#39;'
+       };
+       /**
+        * Used by `_.escape` to convert characters to HTML entities.
+        *
+        * @private
+        * @param {string} chr The matched character to escape.
+        * @returns {string} Returns the escaped character.
+        */
+
+       var escapeHtmlChar = basePropertyOf(htmlEscapes);
+
+       /** Used to match HTML entities and HTML characters. */
+
+       var reUnescapedHtml = /[&<>"']/g,
+           reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
+       /**
+        * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
+        * corresponding HTML entities.
+        *
+        * **Note:** No other characters are escaped. To escape additional
+        * characters use a third-party library like [_he_](https://mths.be/he).
+        *
+        * Though the ">" character is escaped for symmetry, characters like
+        * ">" and "/" don't need escaping in HTML and have no special meaning
+        * unless they're part of a tag or unquoted attribute value. See
+        * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
+        * (under "semi-related fun fact") for more details.
+        *
+        * When working with HTML you should always
+        * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
+        * XSS vectors.
+        *
+        * @static
+        * @since 0.1.0
+        * @memberOf _
+        * @category String
+        * @param {string} [string=''] The string to escape.
+        * @returns {string} Returns the escaped string.
+        * @example
+        *
+        * _.escape('fred, barney, & pebbles');
+        * // => 'fred, barney, &amp; pebbles'
+        */
+
+       function escape$4(string) {
+         string = toString$3(string);
+         return string && reHasUnescapedHtml.test(string) ? string.replace(reUnescapedHtml, escapeHtmlChar) : string;
+       }
+
+       /** Error message constants. */
+
+       var FUNC_ERROR_TEXT = 'Expected a function';
+       /**
+        * Creates a throttled function that only invokes `func` at most once per
+        * every `wait` milliseconds. The throttled function comes with a `cancel`
+        * method to cancel delayed `func` invocations and a `flush` method to
+        * immediately invoke them. Provide `options` to indicate whether `func`
+        * should be invoked on the leading and/or trailing edge of the `wait`
+        * timeout. The `func` is invoked with the last arguments provided to the
+        * throttled function. Subsequent calls to the throttled function return the
+        * result of the last `func` invocation.
+        *
+        * **Note:** If `leading` and `trailing` options are `true`, `func` is
+        * invoked on the trailing edge of the timeout only if the throttled function
+        * is invoked more than once during the `wait` timeout.
+        *
+        * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+        * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+        *
+        * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+        * for details over the differences between `_.throttle` and `_.debounce`.
+        *
+        * @static
+        * @memberOf _
+        * @since 0.1.0
+        * @category Function
+        * @param {Function} func The function to throttle.
+        * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
+        * @param {Object} [options={}] The options object.
+        * @param {boolean} [options.leading=true]
+        *  Specify invoking on the leading edge of the timeout.
+        * @param {boolean} [options.trailing=true]
+        *  Specify invoking on the trailing edge of the timeout.
+        * @returns {Function} Returns the new throttled function.
+        * @example
+        *
+        * // Avoid excessively updating the position while scrolling.
+        * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
+        *
+        * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
+        * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
+        * jQuery(element).on('click', throttled);
+        *
+        * // Cancel the trailing throttled invocation.
+        * jQuery(window).on('popstate', throttled.cancel);
+        */
+
+       function throttle(func, wait, options) {
+         var leading = true,
+             trailing = true;
+
+         if (typeof func != 'function') {
+           throw new TypeError(FUNC_ERROR_TEXT);
+         }
+
+         if (isObject$2(options)) {
+           leading = 'leading' in options ? !!options.leading : leading;
+           trailing = 'trailing' in options ? !!options.trailing : trailing;
+         }
+
+         return debounce(func, wait, {
+           'leading': leading,
+           'maxWait': wait,
+           'trailing': trailing
+         });
+       }
+
+       var $$f = _export;
+       var lastIndexOf = arrayLastIndexOf;
+
+       // `Array.prototype.lastIndexOf` method
+       // https://tc39.es/ecma262/#sec-array.prototype.lastindexof
+       // eslint-disable-next-line es/no-array-prototype-lastindexof -- required for testing
+       $$f({ target: 'Array', proto: true, forced: lastIndexOf !== [].lastIndexOf }, {
+         lastIndexOf: lastIndexOf
+       });
+
+       var global$4 = global$1m;
+       var isArray = isArray$8;
+       var lengthOfArrayLike$1 = lengthOfArrayLike$g;
+       var bind$3 = functionBindContext;
+
+       var TypeError$2 = global$4.TypeError;
+
+       // `FlattenIntoArray` abstract operation
+       // https://tc39.github.io/proposal-flatMap/#sec-FlattenIntoArray
+       var flattenIntoArray$1 = function (target, original, source, sourceLen, start, depth, mapper, thisArg) {
+         var targetIndex = start;
+         var sourceIndex = 0;
+         var mapFn = mapper ? bind$3(mapper, thisArg) : false;
+         var element, elementLen;
+
+         while (sourceIndex < sourceLen) {
+           if (sourceIndex in source) {
+             element = mapFn ? mapFn(source[sourceIndex], sourceIndex, original) : source[sourceIndex];
+
+             if (depth > 0 && isArray(element)) {
+               elementLen = lengthOfArrayLike$1(element);
+               targetIndex = flattenIntoArray$1(target, original, element, elementLen, targetIndex, depth - 1) - 1;
+             } else {
+               if (targetIndex >= 0x1FFFFFFFFFFFFF) throw TypeError$2('Exceed the acceptable array length');
+               target[targetIndex] = element;
+             }
+
+             targetIndex++;
+           }
+           sourceIndex++;
+         }
+         return targetIndex;
+       };
+
+       var flattenIntoArray_1 = flattenIntoArray$1;
+
+       var $$e = _export;
+       var flattenIntoArray = flattenIntoArray_1;
+       var aCallable = aCallable$a;
+       var toObject = toObject$j;
+       var lengthOfArrayLike = lengthOfArrayLike$g;
+       var arraySpeciesCreate = arraySpeciesCreate$4;
+
+       // `Array.prototype.flatMap` method
+       // https://tc39.es/ecma262/#sec-array.prototype.flatmap
+       $$e({ target: 'Array', proto: true }, {
+         flatMap: function flatMap(callbackfn /* , thisArg */) {
+           var O = toObject(this);
+           var sourceLen = lengthOfArrayLike(O);
+           var A;
+           aCallable(callbackfn);
+           A = arraySpeciesCreate(O, 0);
+           A.length = flattenIntoArray(A, O, O, sourceLen, 0, 1, callbackfn, arguments.length > 1 ? arguments[1] : undefined);
+           return A;
+         }
+       });
+
+       // this method was added to unscopables after implementation
+       // in popular engines, so it's moved to a separate module
+       var addToUnscopables = addToUnscopables$6;
+
+       // https://tc39.es/ecma262/#sec-array.prototype-@@unscopables
+       addToUnscopables('flatMap');
+
+       var $$d = _export;
+       var uncurryThis$6 = functionUncurryThis;
+       var getOwnPropertyDescriptor$1 = objectGetOwnPropertyDescriptor.f;
+       var toLength$2 = toLength$c;
+       var toString$2 = toString$k;
+       var notARegExp$1 = notARegexp;
+       var requireObjectCoercible$2 = requireObjectCoercible$e;
+       var correctIsRegExpLogic$1 = correctIsRegexpLogic;
+
+       // eslint-disable-next-line es/no-string-prototype-endswith -- safe
+       var un$EndsWith = uncurryThis$6(''.endsWith);
+       var slice$2 = uncurryThis$6(''.slice);
+       var min$1 = Math.min;
+
+       var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegExpLogic$1('endsWith');
+       // https://github.com/zloirock/core-js/pull/702
+       var MDN_POLYFILL_BUG$1 = !CORRECT_IS_REGEXP_LOGIC$1 && !!function () {
+         var descriptor = getOwnPropertyDescriptor$1(String.prototype, 'endsWith');
+         return descriptor && !descriptor.writable;
+       }();
+
+       // `String.prototype.endsWith` method
+       // https://tc39.es/ecma262/#sec-string.prototype.endswith
+       $$d({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
+         endsWith: function endsWith(searchString /* , endPosition = @length */) {
+           var that = toString$2(requireObjectCoercible$2(this));
+           notARegExp$1(searchString);
+           var endPosition = arguments.length > 1 ? arguments[1] : undefined;
+           var len = that.length;
+           var end = endPosition === undefined ? len : min$1(toLength$2(endPosition), len);
+           var search = toString$2(searchString);
+           return un$EndsWith
+             ? un$EndsWith(that, search, end)
+             : slice$2(that, end - search.length, end) === search;
+         }
+       });
+
+       // https://github.com/tc39/proposal-string-pad-start-end
+       var uncurryThis$5 = functionUncurryThis;
+       var toLength$1 = toLength$c;
+       var toString$1 = toString$k;
+       var $repeat = stringRepeat;
+       var requireObjectCoercible$1 = requireObjectCoercible$e;
+
+       var repeat$1 = uncurryThis$5($repeat);
+       var stringSlice$2 = uncurryThis$5(''.slice);
+       var ceil = Math.ceil;
+
+       // `String.prototype.{ padStart, padEnd }` methods implementation
+       var createMethod = function (IS_END) {
+         return function ($this, maxLength, fillString) {
+           var S = toString$1(requireObjectCoercible$1($this));
+           var intMaxLength = toLength$1(maxLength);
+           var stringLength = S.length;
+           var fillStr = fillString === undefined ? ' ' : toString$1(fillString);
+           var fillLen, stringFiller;
+           if (intMaxLength <= stringLength || fillStr == '') return S;
+           fillLen = intMaxLength - stringLength;
+           stringFiller = repeat$1(fillStr, ceil(fillLen / fillStr.length));
+           if (stringFiller.length > fillLen) stringFiller = stringSlice$2(stringFiller, 0, fillLen);
+           return IS_END ? S + stringFiller : stringFiller + S;
+         };
+       };
+
+       var stringPad = {
+         // `String.prototype.padStart` method
+         // https://tc39.es/ecma262/#sec-string.prototype.padstart
+         start: createMethod(false),
+         // `String.prototype.padEnd` method
+         // https://tc39.es/ecma262/#sec-string.prototype.padend
+         end: createMethod(true)
+       };
+
+       // https://github.com/zloirock/core-js/issues/280
+       var userAgent = engineUserAgent;
+
+       var stringPadWebkitBug = /Version\/10(?:\.\d+){1,2}(?: [\w./]+)?(?: Mobile\/\w+)? Safari\//.test(userAgent);
+
+       var $$c = _export;
+       var $padEnd = stringPad.end;
+       var WEBKIT_BUG$1 = stringPadWebkitBug;
+
+       // `String.prototype.padEnd` method
+       // https://tc39.es/ecma262/#sec-string.prototype.padend
+       $$c({ target: 'String', proto: true, forced: WEBKIT_BUG$1 }, {
+         padEnd: function padEnd(maxLength /* , fillString = ' ' */) {
+           return $padEnd(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });
+
+       var $$b = _export;
+       var $padStart = stringPad.start;
+       var WEBKIT_BUG = stringPadWebkitBug;
+
+       // `String.prototype.padStart` method
+       // https://tc39.es/ecma262/#sec-string.prototype.padstart
+       $$b({ target: 'String', proto: true, forced: WEBKIT_BUG }, {
+         padStart: function padStart(maxLength /* , fillString = ' ' */) {
+           return $padStart(this, maxLength, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });
+
+       var $$a = _export;
+       var $reduceRight = arrayReduce.right;
+       var arrayMethodIsStrict = arrayMethodIsStrict$9;
+       var CHROME_VERSION = engineV8Version;
+       var IS_NODE = engineIsNode;
+
+       var STRICT_METHOD = arrayMethodIsStrict('reduceRight');
+       // Chrome 80-82 has a critical bug
+       // https://bugs.chromium.org/p/chromium/issues/detail?id=1049982
+       var CHROME_BUG = !IS_NODE && CHROME_VERSION > 79 && CHROME_VERSION < 83;
+
+       // `Array.prototype.reduceRight` method
+       // https://tc39.es/ecma262/#sec-array.prototype.reduceright
+       $$a({ target: 'Array', proto: true, forced: !STRICT_METHOD || CHROME_BUG }, {
+         reduceRight: function reduceRight(callbackfn /* , initialValue */) {
+           return $reduceRight(this, callbackfn, arguments.length, arguments.length > 1 ? arguments[1] : undefined);
+         }
+       });
+
+       var $$9 = _export;
+       var repeat = stringRepeat;
+
+       // `String.prototype.repeat` method
+       // https://tc39.es/ecma262/#sec-string.prototype.repeat
+       $$9({ target: 'String', proto: true }, {
+         repeat: repeat
+       });
+
+       var $$8 = _export;
+       var uncurryThis$4 = functionUncurryThis;
+       var getOwnPropertyDescriptor = objectGetOwnPropertyDescriptor.f;
+       var toLength = toLength$c;
+       var toString = toString$k;
+       var notARegExp = notARegexp;
+       var requireObjectCoercible = requireObjectCoercible$e;
+       var correctIsRegExpLogic = correctIsRegexpLogic;
+
+       // eslint-disable-next-line es/no-string-prototype-startswith -- safe
+       var un$StartsWith = uncurryThis$4(''.startsWith);
+       var stringSlice$1 = uncurryThis$4(''.slice);
+       var min = Math.min;
+
+       var CORRECT_IS_REGEXP_LOGIC = correctIsRegExpLogic('startsWith');
+       // https://github.com/zloirock/core-js/pull/702
+       var MDN_POLYFILL_BUG = !CORRECT_IS_REGEXP_LOGIC && !!function () {
+         var descriptor = getOwnPropertyDescriptor(String.prototype, 'startsWith');
+         return descriptor && !descriptor.writable;
+       }();
+
+       // `String.prototype.startsWith` method
+       // https://tc39.es/ecma262/#sec-string.prototype.startswith
+       $$8({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
+         startsWith: function startsWith(searchString /* , position = 0 */) {
+           var that = toString(requireObjectCoercible(this));
+           notARegExp(searchString);
+           var index = toLength(min(arguments.length > 1 ? arguments[1] : undefined, that.length));
+           var search = toString(searchString);
+           return un$StartsWith
+             ? un$StartsWith(that, search, index)
+             : stringSlice$1(that, index, index + search.length) === search;
+         }
+       });
+
+       var $$7 = _export;
+       var $trimEnd = stringTrim.end;
+       var forcedStringTrimMethod$1 = stringTrimForced;
+
+       var FORCED$4 = forcedStringTrimMethod$1('trimEnd');
+
+       var trimEnd = FORCED$4 ? function trimEnd() {
+         return $trimEnd(this);
+       // eslint-disable-next-line es/no-string-prototype-trimstart-trimend -- safe
+       } : ''.trimEnd;
+
+       // `String.prototype.{ trimEnd, trimRight }` methods
+       // https://tc39.es/ecma262/#sec-string.prototype.trimend
+       // https://tc39.es/ecma262/#String.prototype.trimright
+       $$7({ target: 'String', proto: true, name: 'trimEnd', forced: FORCED$4 }, {
+         trimEnd: trimEnd,
+         trimRight: trimEnd
+       });
+
+       var $$6 = _export;
+       var $trimStart = stringTrim.start;
+       var forcedStringTrimMethod = stringTrimForced;
+
+       var FORCED$3 = forcedStringTrimMethod('trimStart');
+
+       var trimStart = FORCED$3 ? function trimStart() {
+         return $trimStart(this);
+       // eslint-disable-next-line es/no-string-prototype-trimstart-trimend -- safe
+       } : ''.trimStart;
+
+       // `String.prototype.{ trimStart, trimLeft }` methods
+       // https://tc39.es/ecma262/#sec-string.prototype.trimstart
+       // https://tc39.es/ecma262/#String.prototype.trimleft
+       $$6({ target: 'String', proto: true, name: 'trimStart', forced: FORCED$3 }, {
+         trimStart: trimStart,
+         trimLeft: trimStart
+       });
+
+       var _mainLocalizer = coreLocalizer(); // singleton
+
+
+       var _t = _mainLocalizer.t;
+       // coreLocalizer manages language and locale parameters including translated strings
+       //
+
+       function coreLocalizer() {
+         var localizer = {};
+         var _dataLanguages = {}; // `_dataLocales` is an object containing all _supported_ locale codes -> language info.
+         // * `rtl` - right-to-left or left-to-right text direction
+         // * `pct` - the percent of strings translated; 1 = 100%, full coverage
+         //
+         // {
+         // en: { rtl: false, pct: {…} },
+         // de: { rtl: false, pct: {…} },
+         // …
+         // }
+
+         var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
+         // {
+         // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+         // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
+         // …
+         // }
+
+         var _localeStrings = {}; // the current locale
+
+         var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
+
+         var _localeCodes = ['en-US', 'en'];
+         var _languageCode = 'en';
+         var _textDirection = 'ltr';
+         var _usesMetric = false;
+         var _languageNames = {};
+         var _scriptNames = {}; // getters for the current locale parameters
+
+         localizer.localeCode = function () {
+           return _localeCode;
+         };
+
+         localizer.localeCodes = function () {
+           return _localeCodes;
+         };
+
+         localizer.languageCode = function () {
+           return _languageCode;
+         };
+
+         localizer.textDirection = function () {
+           return _textDirection;
+         };
+
+         localizer.usesMetric = function () {
+           return _usesMetric;
+         };
+
+         localizer.languageNames = function () {
+           return _languageNames;
+         };
+
+         localizer.scriptNames = function () {
+           return _scriptNames;
+         }; // The client app may want to manually set the locale, regardless of the
+         // settings provided by the browser
+
+
+         var _preferredLocaleCodes = [];
+
+         localizer.preferredLocaleCodes = function (codes) {
+           if (!arguments.length) return _preferredLocaleCodes;
+
+           if (typeof codes === 'string') {
+             // be generous and accept delimited strings as input
+             _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
+           } else {
+             _preferredLocaleCodes = codes;
+           }
+
+           return localizer;
+         };
+
+         var _loadPromise;
+
+         localizer.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
+           var filesToFetch = ['languages', // load the list of languages
+           'locales' // load the list of supported locales
+           ];
+           var localeDirs = {
+             general: 'locales',
+             tagging: 'https://cdn.jsdelivr.net/npm/@openstreetmap/id-tagging-schema@3/dist/translations'
+           };
+           var fileMap = _mainFileFetcher.fileMap();
+
+           for (var scopeId in localeDirs) {
+             var key = "locales_index_".concat(scopeId);
+
+             if (!fileMap[key]) {
+               fileMap[key] = localeDirs[scopeId] + '/index.min.json';
+             }
+
+             filesToFetch.push(key);
+           }
+
+           return _loadPromise = Promise.all(filesToFetch.map(function (key) {
+             return _mainFileFetcher.get(key);
+           })).then(function (results) {
+             _dataLanguages = results[0];
+             _dataLocales = results[1];
+             var indexes = results.slice(2);
+
+             var requestedLocales = (_preferredLocaleCodes || []).concat(utilDetect().browserLocales) // List of locales preferred by the browser in priority order.
+             .concat(['en']); // fallback to English since it's the only guaranteed complete language
+
+
+             _localeCodes = localesToUseFrom(requestedLocales);
+             _localeCode = _localeCodes[0]; // Run iD in the highest-priority locale; the rest are fallbacks
+
+             var loadStringsPromises = [];
+             indexes.forEach(function (index, i) {
+               // Will always return the index for `en` if nothing else
+               var fullCoverageIndex = _localeCodes.findIndex(function (locale) {
+                 return index[locale] && index[locale].pct === 1;
+               }); // We only need to load locales up until we find one with full coverage
+
+
+               _localeCodes.slice(0, fullCoverageIndex + 1).forEach(function (code) {
+                 var scopeId = Object.keys(localeDirs)[i];
+                 var directory = Object.values(localeDirs)[i];
+                 if (index[code]) loadStringsPromises.push(localizer.loadLocale(code, scopeId, directory));
+               });
+             });
+             return Promise.all(loadStringsPromises);
+           }).then(function () {
+             updateForCurrentLocale();
+           })["catch"](function (err) {
+             return console.error(err);
+           }); // eslint-disable-line
+         }; // Returns the locales from `requestedLocales` supported by iD that we should use
+
+
+         function localesToUseFrom(requestedLocales) {
+           var supportedLocales = _dataLocales;
+           var toUse = [];
+
+           for (var i in requestedLocales) {
+             var locale = requestedLocales[i];
+             if (supportedLocales[locale]) toUse.push(locale);
+
+             if (locale.includes('-')) {
+               // Full locale ('es-ES'), add fallback to the base ('es')
+               var langPart = locale.split('-')[0];
+               if (supportedLocales[langPart]) toUse.push(langPart);
+             }
+           } // remove duplicates
+
+
+           return utilArrayUniq(toUse);
+         }
+
+         function updateForCurrentLocale() {
+           if (!_localeCode) return;
+           _languageCode = _localeCode.split('-')[0];
+           var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
+           var hash = utilStringQs(window.location.hash);
+
+           if (hash.rtl === 'true') {
+             _textDirection = 'rtl';
+           } else if (hash.rtl === 'false') {
+             _textDirection = 'ltr';
+           } else {
+             _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
+           }
+
+           var locale = _localeCode;
+           if (locale.toLowerCase() === 'en-us') locale = 'en';
+           _languageNames = _localeStrings.general[locale].languageNames;
+           _scriptNames = _localeStrings.general[locale].scriptNames;
+           _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
+         }
+         /* Locales */
+         // Returns a Promise to load the strings for the requested locale
+
+
+         localizer.loadLocale = function (locale, scopeId, directory) {
+           // US English is the default
+           if (locale.toLowerCase() === 'en-us') locale = 'en';
+
+           if (_localeStrings[scopeId] && _localeStrings[scopeId][locale]) {
+             // already loaded
+             return Promise.resolve(locale);
+           }
+
+           var fileMap = _mainFileFetcher.fileMap();
+           var key = "locale_".concat(scopeId, "_").concat(locale);
+
+           if (!fileMap[key]) {
+             fileMap[key] = "".concat(directory, "/").concat(locale, ".min.json");
+           }
+
+           return _mainFileFetcher.get(key).then(function (d) {
+             if (!_localeStrings[scopeId]) _localeStrings[scopeId] = {};
+             _localeStrings[scopeId][locale] = d[locale];
+             return locale;
+           });
+         };
+
+         localizer.pluralRule = function (number) {
+           return pluralRule(number, _localeCode);
+         }; // Returns the plural rule for the given `number` with the given `localeCode`.
+         // One of: `zero`, `one`, `two`, `few`, `many`, `other`
+
+
+         function pluralRule(number, localeCode) {
+           // modern browsers have this functionality built-in
+           var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);
+
+           if (rules) {
+             return rules.select(number);
+           } // fallback to basic one/other, as in English
+
+
+           if (number === 1) return 'one';
+           return 'other';
+         }
+         /**
+         * Try to find that string in `locale` or the current `_localeCode` matching
+         * the given `stringId`. If no string can be found in the requested locale,
+         * we'll recurse down all the `_localeCodes` until one is found.
+         *
+         * @param  {string}   stringId      string identifier
+         * @param  {object?}  replacements  token replacements and default string
+         * @param  {string?}  locale        locale to use (defaults to currentLocale)
+         * @return {string?}  localized string
+         */
+
+
+         localizer.tInfo = function (origStringId, replacements, locale) {
+           var stringId = origStringId.trim();
+           var scopeId = 'general';
+
+           if (stringId[0] === '_') {
+             var split = stringId.split('.');
+             scopeId = split[0].slice(1);
+             stringId = split.slice(1).join('.');
+           }
+
+           locale = locale || _localeCode;
+           var path = stringId.split('.').map(function (s) {
+             return s.replace(/<TX_DOT>/g, '.');
+           }).reverse();
+           var stringsKey = locale; // US English is the default
+
+           if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
+           var result = _localeStrings && _localeStrings[scopeId] && _localeStrings[scopeId][stringsKey];
+
+           while (result !== undefined && path.length) {
+             result = result[path.pop()];
+           }
+
+           if (result !== undefined) {
+             if (replacements) {
+               if (_typeof(result) === 'object' && Object.keys(result).length) {
+                 // If plural forms are provided, dig one level deeper based on the
+                 // first numeric token replacement provided.
+                 var number = Object.values(replacements).find(function (value) {
+                   return typeof value === 'number';
+                 });
+
+                 if (number !== undefined) {
+                   var rule = pluralRule(number, locale);
+
+                   if (result[rule]) {
+                     result = result[rule];
+                   } else {
+                     // We're pretty sure this should be a plural but no string
+                     // could be found for the given rule. Just pick the first
+                     // string and hope it makes sense.
+                     result = Object.values(result)[0];
+                   }
+                 }
+               }
+
+               if (typeof result === 'string') {
+                 for (var key in replacements) {
+                   var value = replacements[key];
+
+                   if (typeof value === 'number') {
+                     if (value.toLocaleString) {
+                       // format numbers for the locale
+                       value = value.toLocaleString(locale, {
+                         style: 'decimal',
+                         useGrouping: true,
+                         minimumFractionDigits: 0
+                       });
+                     } else {
+                       value = value.toString();
+                     }
+                   }
+
+                   var token = "{".concat(key, "}");
+                   var regex = new RegExp(token, 'g');
+                   result = result.replace(regex, value);
+                 }
+               }
+             }
+
+             if (typeof result === 'string') {
+               // found a localized string!
+               return {
+                 text: result,
+                 locale: locale
+               };
+             }
+           } // no localized string found...
+           // attempt to fallback to a lower-priority language
+
+
+           var index = _localeCodes.indexOf(locale);
+
+           if (index >= 0 && index < _localeCodes.length - 1) {
+             // eventually this will be 'en' or another locale with 100% coverage
+             var fallback = _localeCodes[index + 1];
+             return localizer.tInfo(origStringId, replacements, fallback);
+           }
+
+           if (replacements && 'default' in replacements) {
+             // Fallback to a default value if one is specified in `replacements`
+             return {
+               text: replacements["default"],
+               locale: null
+             };
+           }
+
+           var missing = "Missing ".concat(locale, " translation: ").concat(origStringId);
+           if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
+
+           return {
+             text: missing,
+             locale: 'en'
+           };
+         };
+
+         localizer.hasTextForStringId = function (stringId) {
+           return !!localizer.tInfo(stringId, {
+             "default": 'nothing found'
+           }).locale;
+         }; // Returns only the localized text, discarding the locale info
+
+
+         localizer.t = function (stringId, replacements, locale) {
+           return localizer.tInfo(stringId, replacements, locale).text;
+         }; // Returns the localized text wrapped in an HTML element encoding the locale info
+
+         /**
+          * @deprecated This method is considered deprecated. Instead, use the direct DOM manipulating
+          *             method `t.append`.
+          */
+
+
+         localizer.t.html = function (stringId, replacements, locale) {
+           // replacement string might be html unsafe, so we need to escape it except if it is explicitly marked as html code
+           replacements = Object.assign({}, replacements);
+
+           for (var k in replacements) {
+             if (typeof replacements[k] === 'string') {
+               replacements[k] = escape$4(replacements[k]);
+             }
+
+             if (_typeof(replacements[k]) === 'object' && typeof replacements[k].html === 'string') {
+               replacements[k] = replacements[k].html;
+             }
+           }
+
+           var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is
+
+           if (info.text) {
+             return "<span class=\"localized-text\" lang=\"".concat(info.locale || 'und', "\">").concat(info.text, "</span>");
+           } else {
+             return '';
+           }
+         }; // Adds localized text wrapped as an HTML span element with locale info to the DOM
+
+
+         localizer.t.append = function (stringId, replacements, locale) {
+           return function (selection) {
+             var info = localizer.tInfo(stringId, replacements, locale);
+             return selection.append('span').attr('class', 'localized-text').attr('lang', info.locale || 'und').text((replacements && replacements.prefix || '') + info.text + (replacements && replacements.suffix || ''));
+           };
+         };
+
+         localizer.languageName = function (code, options) {
+           if (_languageNames[code]) {
+             // name in locale language
+             // e.g. "German"
+             return _languageNames[code];
+           } // sometimes we only want the local name
+
+
+           if (options && options.localOnly) return null;
+           var langInfo = _dataLanguages[code];
+
+           if (langInfo) {
+             if (langInfo.nativeName) {
+               // name in native language
+               // e.g. "Deutsch (de)"
+               return localizer.t('translate.language_and_code', {
+                 language: langInfo.nativeName,
+                 code: code
+               });
+             } else if (langInfo.base && langInfo.script) {
+               var base = langInfo.base; // the code of the language this is based on
+
+               if (_languageNames[base]) {
+                 // base language name in locale language
+                 var scriptCode = langInfo.script;
+                 var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
+
+                 return localizer.t('translate.language_and_code', {
+                   language: _languageNames[base],
+                   code: script
+                 });
+               } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
+                 // e.g. "српски (sr-Cyrl)"
+                 return localizer.t('translate.language_and_code', {
+                   language: _dataLanguages[base].nativeName,
+                   code: code
+                 });
+               }
+             }
+           }
+
+           return code; // if not found, use the code
+         };
+
+         return localizer;
+       }
+
+       // `presetCollection` is a wrapper around an `Array` of presets `collection`,
+       // and decorated with some extra methods for searching and matching geometry
+       //
+
+       function presetCollection(collection) {
+         var MAXRESULTS = 50;
+         var _this = {};
+         var _memo = {};
+         _this.collection = collection;
+
+         _this.item = function (id) {
+           if (_memo[id]) return _memo[id];
+
+           var found = _this.collection.find(function (d) {
+             return d.id === id;
+           });
+
+           if (found) _memo[id] = found;
+           return found;
+         };
+
+         _this.index = function (id) {
+           return _this.collection.findIndex(function (d) {
+             return d.id === id;
+           });
+         };
+
+         _this.matchGeometry = function (geometry) {
+           return presetCollection(_this.collection.filter(function (d) {
+             return d.matchGeometry(geometry);
+           }));
+         };
+
+         _this.matchAllGeometry = function (geometries) {
+           return presetCollection(_this.collection.filter(function (d) {
+             return d && d.matchAllGeometry(geometries);
+           }));
+         };
+
+         _this.matchAnyGeometry = function (geometries) {
+           return presetCollection(_this.collection.filter(function (d) {
+             return geometries.some(function (geom) {
+               return d.matchGeometry(geom);
+             });
+           }));
+         };
+
+         _this.fallback = function (geometry) {
+           var id = geometry;
+           if (id === 'vertex') id = 'point';
+           return _this.item(id);
+         };
+
+         _this.search = function (value, geometry, loc) {
+           if (!value) return _this; // don't remove diacritical characters since we're assuming the user is being intentional
+
+           value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
+
+           function leading(a) {
+             var index = a.indexOf(value);
+             return index === 0 || a[index - 1] === ' ';
+           } // match at name beginning only
+
+
+           function leadingStrict(a) {
+             var index = a.indexOf(value);
+             return index === 0;
+           }
+
+           function sortPresets(nameProp) {
+             return function sortNames(a, b) {
+               var aCompare = a[nameProp]();
+               var bCompare = b[nameProp](); // priority if search string matches preset name exactly - #4325
+
+               if (value === aCompare) return -1;
+               if (value === bCompare) return 1; // priority for higher matchScore
+
+               var i = b.originalScore - a.originalScore;
+               if (i !== 0) return i; // priority if search string appears earlier in preset name
+
+               i = aCompare.indexOf(value) - bCompare.indexOf(value);
+               if (i !== 0) return i; // priority for shorter preset names
+
+               return aCompare.length - bCompare.length;
+             };
+           }
+
+           var pool = _this.collection;
+
+           if (Array.isArray(loc)) {
+             var validLocations = _mainLocations.locationsAt(loc);
+             pool = pool.filter(function (a) {
+               return !a.locationSetID || validLocations[a.locationSetID];
+             });
+           }
+
+           var searchable = pool.filter(function (a) {
+             return a.searchable !== false && a.suggestion !== true;
+           });
+           var suggestions = pool.filter(function (a) {
+             return a.suggestion === true;
+           }); // matches value to preset.name
+
+           var leadingNames = searchable.filter(function (a) {
+             return leading(a.searchName());
+           }).sort(sortPresets('searchName')); // matches value to preset suggestion name
+
+           var leadingSuggestions = suggestions.filter(function (a) {
+             return leadingStrict(a.searchName());
+           }).sort(sortPresets('searchName'));
+           var leadingNamesStripped = searchable.filter(function (a) {
+             return leading(a.searchNameStripped());
+           }).sort(sortPresets('searchNameStripped'));
+           var leadingSuggestionsStripped = suggestions.filter(function (a) {
+             return leadingStrict(a.searchNameStripped());
+           }).sort(sortPresets('searchNameStripped')); // matches value to preset.terms values
+
+           var leadingTerms = searchable.filter(function (a) {
+             return (a.terms() || []).some(leading);
+           });
+           var leadingSuggestionTerms = suggestions.filter(function (a) {
+             return (a.terms() || []).some(leading);
+           }); // matches value to preset.tags values
+
+           var leadingTagValues = searchable.filter(function (a) {
+             return Object.values(a.tags || {}).filter(function (val) {
+               return val !== '*';
+             }).some(leading);
+           }); // finds close matches to value in preset.name
+
+           var similarName = searchable.map(function (a) {
+             return {
+               preset: a,
+               dist: utilEditDistance(value, a.searchName())
+             };
+           }).filter(function (a) {
+             return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 3;
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           }).map(function (a) {
+             return a.preset;
+           }); // finds close matches to value to preset suggestion name
+
+           var similarSuggestions = suggestions.map(function (a) {
+             return {
+               preset: a,
+               dist: utilEditDistance(value, a.searchName())
+             };
+           }).filter(function (a) {
+             return a.dist + Math.min(value.length - a.preset.searchName().length, 0) < 1;
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           }).map(function (a) {
+             return a.preset;
+           }); // finds close matches to value in preset.terms
+
+           var similarTerms = searchable.filter(function (a) {
+             return (a.terms() || []).some(function (b) {
+               return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
+             });
+           });
+           var results = leadingNames.concat(leadingSuggestions, leadingNamesStripped, leadingSuggestionsStripped, leadingTerms, leadingSuggestionTerms, leadingTagValues, similarName, similarSuggestions, similarTerms).slice(0, MAXRESULTS - 1);
+
+           if (geometry) {
+             if (typeof geometry === 'string') {
+               results.push(_this.fallback(geometry));
+             } else {
+               geometry.forEach(function (geom) {
+                 return results.push(_this.fallback(geom));
+               });
+             }
+           }
+
+           return presetCollection(utilArrayUniq(results));
+         };
+
+         return _this;
+       }
+
+       // `presetCategory` builds a `presetCollection` of member presets,
+       // decorated with some extra methods for searching and matching geometry
+       //
+
+       function presetCategory(categoryID, category, allPresets) {
+         var _this = Object.assign({}, category); // shallow copy
+
+
+         var _searchName; // cache
+
+
+         var _searchNameStripped; // cache
+
+
+         _this.id = categoryID;
+         _this.members = presetCollection((category.members || []).map(function (presetID) {
+           return allPresets[presetID];
+         }).filter(Boolean));
+         _this.geometry = _this.members.collection.reduce(function (acc, preset) {
+           for (var i in preset.geometry) {
+             var geometry = preset.geometry[i];
+
+             if (acc.indexOf(geometry) === -1) {
+               acc.push(geometry);
+             }
+           }
+
+           return acc;
+         }, []);
+
+         _this.matchGeometry = function (geom) {
+           return _this.geometry.indexOf(geom) >= 0;
+         };
+
+         _this.matchAllGeometry = function (geometries) {
+           return _this.members.collection.some(function (preset) {
+             return preset.matchAllGeometry(geometries);
+           });
+         };
+
+         _this.matchScore = function () {
+           return -1;
+         };
+
+         _this.name = function () {
+           return _t("_tagging.presets.categories.".concat(categoryID, ".name"), {
+             'default': categoryID
+           });
+         };
+
+         _this.nameLabel = function () {
+           return _t.html("_tagging.presets.categories.".concat(categoryID, ".name"), {
+             'default': categoryID
+           });
+         };
+
+         _this.terms = function () {
+           return [];
+         };
+
+         _this.searchName = function () {
+           if (!_searchName) {
+             _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
+           }
+
+           return _searchName;
+         };
+
+         _this.searchNameStripped = function () {
+           if (!_searchNameStripped) {
+             _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
+
+             if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
+
+             _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+           }
+
+           return _searchNameStripped;
+         };
+
+         return _this;
+       }
+
+       // `presetField` decorates a given `field` Object
+       // with some extra methods for searching and matching geometry
+       //
+
+       function presetField(fieldID, field) {
+         var _this = Object.assign({}, field); // shallow copy
+
+
+         _this.id = fieldID; // for use in classes, element ids, css selectors
+
+         _this.safeid = utilSafeClassName(fieldID);
+
+         _this.matchGeometry = function (geom) {
+           return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
+         };
+
+         _this.matchAllGeometry = function (geometries) {
+           return !_this.geometry || geometries.every(function (geom) {
+             return _this.geometry.indexOf(geom) !== -1;
+           });
+         };
+
+         _this.t = function (scope, options) {
+           return _t("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+         };
+
+         _this.t.html = function (scope, options) {
+           return _t.html("_tagging.presets.fields.".concat(fieldID, ".").concat(scope), options);
+         };
+
+         _this.hasTextForStringId = function (scope) {
+           return _mainLocalizer.hasTextForStringId("_tagging.presets.fields.".concat(fieldID, ".").concat(scope));
+         };
+
+         _this.title = function () {
+           return _this.overrideLabel || _this.t('label', {
+             'default': fieldID
+           });
+         };
+
+         _this.label = function () {
+           return _this.overrideLabel || _this.t.html('label', {
+             'default': fieldID
+           });
+         };
+
+         var _placeholder = _this.placeholder;
+
+         _this.placeholder = function () {
+           return _this.t('placeholder', {
+             'default': _placeholder
+           });
+         };
+
+         _this.originalTerms = (_this.terms || []).join();
+
+         _this.terms = function () {
+           return _this.t('terms', {
+             'default': _this.originalTerms
+           }).toLowerCase().trim().split(/\s*,+\s*/);
+         };
+
+         _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
+         return _this;
+       }
+
+       // `presetPreset` decorates a given `preset` Object
+       // with some extra methods for searching and matching geometry
+       //
+
+       function presetPreset(presetID, preset, addable, allFields, allPresets) {
+         allFields = allFields || {};
+         allPresets = allPresets || {};
+
+         var _this = Object.assign({}, preset); // shallow copy
+
+
+         var _addable = addable || false;
+
+         var _resolvedFields; // cache
+
+
+         var _resolvedMoreFields; // cache
+
+
+         var _searchName; // cache
+
+
+         var _searchNameStripped; // cache
+
+
+         _this.id = presetID;
+         _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
+
+         _this.originalTerms = (_this.terms || []).join();
+         _this.originalName = _this.name || '';
+         _this.originalScore = _this.matchScore || 1;
+         _this.originalReference = _this.reference || {};
+         _this.originalFields = _this.fields || [];
+         _this.originalMoreFields = _this.moreFields || [];
+
+         _this.fields = function () {
+           return _resolvedFields || (_resolvedFields = resolve('fields'));
+         };
+
+         _this.moreFields = function () {
+           return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
+         };
+
+         _this.resetFields = function () {
+           return _resolvedFields = _resolvedMoreFields = null;
+         };
+
+         _this.tags = _this.tags || {};
+         _this.addTags = _this.addTags || _this.tags;
+         _this.removeTags = _this.removeTags || _this.addTags;
+         _this.geometry = _this.geometry || [];
+
+         _this.matchGeometry = function (geom) {
+           return _this.geometry.indexOf(geom) >= 0;
+         };
+
+         _this.matchAllGeometry = function (geoms) {
+           return geoms.every(_this.matchGeometry);
+         };
+
+         _this.matchScore = function (entityTags) {
+           var tags = _this.tags;
+           var seen = {};
+           var score = 0; // match on tags
+
+           for (var k in tags) {
+             seen[k] = true;
+
+             if (entityTags[k] === tags[k]) {
+               score += _this.originalScore;
+             } else if (tags[k] === '*' && k in entityTags) {
+               score += _this.originalScore / 2;
+             } else {
+               return -1;
+             }
+           } // boost score for additional matches in addTags - #6802
+
+
+           var addTags = _this.addTags;
+
+           for (var _k in addTags) {
+             if (!seen[_k] && entityTags[_k] === addTags[_k]) {
+               score += _this.originalScore;
+             }
+           }
+
+           return score;
+         };
+
+         _this.t = function (scope, options) {
+           var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+           return _t(textID, options);
+         };
+
+         _this.t.html = function (scope, options) {
+           var textID = "_tagging.presets.presets.".concat(presetID, ".").concat(scope);
+           return _t.html(textID, options);
+         };
+
+         _this.name = function () {
+           return _this.t('name', {
+             'default': _this.originalName
+           });
+         };
+
+         _this.nameLabel = function () {
+           return _this.t.html('name', {
+             'default': _this.originalName
+           });
+         };
+
+         _this.subtitle = function () {
+           if (_this.suggestion) {
+             var path = presetID.split('/');
+             path.pop(); // remove brand name
+
+             return _t('_tagging.presets.presets.' + path.join('/') + '.name');
+           }
+
+           return null;
+         };
+
+         _this.subtitleLabel = function () {
+           if (_this.suggestion) {
+             var path = presetID.split('/');
+             path.pop(); // remove brand name
+
+             return _t.html('_tagging.presets.presets.' + path.join('/') + '.name');
+           }
+
+           return null;
+         };
+
+         _this.terms = function () {
+           return _this.t('terms', {
+             'default': _this.originalTerms
+           }).toLowerCase().trim().split(/\s*,+\s*/);
+         };
+
+         _this.searchName = function () {
+           if (!_searchName) {
+             _searchName = (_this.suggestion ? _this.originalName : _this.name()).toLowerCase();
+           }
+
+           return _searchName;
+         };
+
+         _this.searchNameStripped = function () {
+           if (!_searchNameStripped) {
+             _searchNameStripped = _this.searchName(); // split combined diacritical characters into their parts
+
+             if (_searchNameStripped.normalize) _searchNameStripped = _searchNameStripped.normalize('NFD'); // remove diacritics
+
+             _searchNameStripped = _searchNameStripped.replace(/[\u0300-\u036f]/g, '');
+           }
+
+           return _searchNameStripped;
+         };
+
+         _this.isFallback = function () {
+           var tagCount = Object.keys(_this.tags).length;
+           return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
+         };
+
+         _this.addable = function (val) {
+           if (!arguments.length) return _addable;
+           _addable = val;
+           return _this;
+         };
+
+         _this.reference = function () {
+           // Lookup documentation on Wikidata...
+           var qid = _this.tags.wikidata || _this.tags['flag:wikidata'] || _this.tags['brand:wikidata'] || _this.tags['network:wikidata'] || _this.tags['operator:wikidata'];
+
+           if (qid) {
+             return {
+               qid: qid
+             };
+           } // Lookup documentation on OSM Wikibase...
+
+
+           var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
+           var value = _this.originalReference.value || _this.tags[key];
+
+           if (value === '*') {
+             return {
+               key: key
+             };
+           } else {
+             return {
+               key: key,
+               value: value
+             };
+           }
+         };
+
+         _this.unsetTags = function (tags, geometry, ignoringKeys, skipFieldDefaults) {
+           // allow manually keeping some tags
+           var removeTags = ignoringKeys ? utilObjectOmit(_this.removeTags, ignoringKeys) : _this.removeTags;
+           tags = utilObjectOmit(tags, Object.keys(removeTags));
+
+           if (geometry && !skipFieldDefaults) {
+             _this.fields().forEach(function (field) {
+               if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
+                 delete tags[field.key];
+               }
+             });
+           }
+
+           delete tags.area;
+           return tags;
+         };
+
+         _this.setTags = function (tags, geometry, skipFieldDefaults) {
+           var addTags = _this.addTags;
+           tags = Object.assign({}, tags); // shallow copy
+
+           for (var k in addTags) {
+             if (addTags[k] === '*') {
+               // if this tag is ancillary, don't override an existing value since any value is okay
+               if (_this.tags[k] || !tags[k] || tags[k] === 'no') {
+                 tags[k] = 'yes';
+               }
+             } else {
+               tags[k] = addTags[k];
+             }
+           } // Add area=yes if necessary.
+           // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
+           // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
+           // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
+
+
+           if (!addTags.hasOwnProperty('area')) {
+             delete tags.area;
+
+             if (geometry === 'area') {
+               var needsAreaTag = true;
+
+               if (_this.geometry.indexOf('line') === -1) {
+                 for (var _k2 in addTags) {
+                   if (_k2 in osmAreaKeys) {
+                     needsAreaTag = false;
+                     break;
+                   }
+                 }
+               }
+
+               if (needsAreaTag) {
+                 tags.area = 'yes';
+               }
+             }
+           }
+
+           if (geometry && !skipFieldDefaults) {
+             _this.fields().forEach(function (field) {
+               if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
+                 tags[field.key] = field["default"];
+               }
+             });
+           }
+
+           return tags;
+         }; // For a preset without fields, use the fields of the parent preset.
+         // Replace {preset} placeholders with the fields of the specified presets.
+
+
+         function resolve(which) {
+           var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
+           var resolved = [];
+           fieldIDs.forEach(function (fieldID) {
+             var match = fieldID.match(/\{(.*)\}/);
+
+             if (match !== null) {
+               // a presetID wrapped in braces {}
+               resolved = resolved.concat(inheritFields(match[1], which));
+             } else if (allFields[fieldID]) {
+               // a normal fieldID
+               resolved.push(allFields[fieldID]);
+             } else {
+               console.log("Cannot resolve \"".concat(fieldID, "\" found in ").concat(_this.id, ".").concat(which)); // eslint-disable-line no-console
+             }
+           }); // no fields resolved, so use the parent's if possible
+
+           if (!resolved.length) {
+             var endIndex = _this.id.lastIndexOf('/');
+
+             var parentID = endIndex && _this.id.substring(0, endIndex);
+
+             if (parentID) {
+               resolved = inheritFields(parentID, which);
+             }
+           }
+
+           return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found
+
+           function inheritFields(presetID, which) {
+             var parent = allPresets[presetID];
+             if (!parent) return [];
+
+             if (which === 'fields') {
+               return parent.fields().filter(shouldInherit);
+             } else if (which === 'moreFields') {
+               return parent.moreFields();
+             } else {
+               return [];
+             }
+           } // Skip `fields` for the keys which define the preset.
+           // These are usually `typeCombo` fields like `shop=*`
+
+
+           function shouldInherit(f) {
+             if (f.key && _this.tags[f.key] !== undefined && // inherit anyway if multiple values are allowed or just a checkbox
+             f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'manyCombo' && f.type !== 'check') return false;
+             return true;
+           }
+         }
+
+         return _this;
+       }
+
+       var _mainPresetIndex = presetIndex(); // singleton
+       // `presetIndex` wraps a `presetCollection`
+       // with methods for loading new data and returning defaults
+       //
+
+       function presetIndex() {
+         var dispatch = dispatch$8('favoritePreset', 'recentsChange');
+         var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks
+
+         var POINT = presetPreset('point', {
+           name: 'Point',
+           tags: {},
+           geometry: ['point', 'vertex'],
+           matchScore: 0.1
+         });
+         var LINE = presetPreset('line', {
+           name: 'Line',
+           tags: {},
+           geometry: ['line'],
+           matchScore: 0.1
+         });
+         var AREA = presetPreset('area', {
+           name: 'Area',
+           tags: {
+             area: 'yes'
+           },
+           geometry: ['area'],
+           matchScore: 0.1
+         });
+         var RELATION = presetPreset('relation', {
+           name: 'Relation',
+           tags: {},
+           geometry: ['relation'],
+           matchScore: 0.1
+         });
+
+         var _this = presetCollection([POINT, LINE, AREA, RELATION]);
+
+         var _presets = {
+           point: POINT,
+           line: LINE,
+           area: AREA,
+           relation: RELATION
+         };
+         var _defaults = {
+           point: presetCollection([POINT]),
+           vertex: presetCollection([POINT]),
+           line: presetCollection([LINE]),
+           area: presetCollection([AREA]),
+           relation: presetCollection([RELATION])
+         };
+         var _fields = {};
+         var _categories = {};
+         var _universal = [];
+         var _addablePresetIDs = null; // Set of preset IDs that the user can add
+
+         var _recents;
+
+         var _favorites; // Index of presets by (geometry, tag key).
+
+
+         var _geometryIndex = {
+           point: {},
+           vertex: {},
+           line: {},
+           area: {},
+           relation: {}
+         };
+
+         var _loadPromise;
+
+         _this.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
+           return _loadPromise = Promise.all([_mainFileFetcher.get('preset_categories'), _mainFileFetcher.get('preset_defaults'), _mainFileFetcher.get('preset_presets'), _mainFileFetcher.get('preset_fields')]).then(function (vals) {
+             _this.merge({
+               categories: vals[0],
+               defaults: vals[1],
+               presets: vals[2],
+               fields: vals[3]
+             });
+
+             osmSetAreaKeys(_this.areaKeys());
+             osmSetPointTags(_this.pointTags());
+             osmSetVertexTags(_this.vertexTags());
+           });
+         }; // `merge` accepts an object containing new preset data (all properties optional):
+         // {
+         //   fields: {},
+         //   presets: {},
+         //   categories: {},
+         //   defaults: {},
+         //   featureCollection: {}
+         //}
+
+
+         _this.merge = function (d) {
+           var newLocationSets = []; // Merge Fields
+
+           if (d.fields) {
+             Object.keys(d.fields).forEach(function (fieldID) {
+               var f = d.fields[fieldID];
+
+               if (f) {
+                 // add or replace
+                 f = presetField(fieldID, f);
+                 if (f.locationSet) newLocationSets.push(f);
+                 _fields[fieldID] = f;
+               } else {
+                 // remove
+                 delete _fields[fieldID];
+               }
+             });
+           } // Merge Presets
+
+
+           if (d.presets) {
+             Object.keys(d.presets).forEach(function (presetID) {
+               var p = d.presets[presetID];
+
+               if (p) {
+                 // add or replace
+                 var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
+
+                 p = presetPreset(presetID, p, isAddable, _fields, _presets);
+                 if (p.locationSet) newLocationSets.push(p);
+                 _presets[presetID] = p;
+               } else {
+                 // remove (but not if it's a fallback)
+                 var existing = _presets[presetID];
+
+                 if (existing && !existing.isFallback()) {
+                   delete _presets[presetID];
+                 }
+               }
+             });
+           } // Merge Categories
+
+
+           if (d.categories) {
+             Object.keys(d.categories).forEach(function (categoryID) {
+               var c = d.categories[categoryID];
+
+               if (c) {
+                 // add or replace
+                 c = presetCategory(categoryID, c, _presets);
+                 if (c.locationSet) newLocationSets.push(c);
+                 _categories[categoryID] = c;
+               } else {
+                 // remove
+                 delete _categories[categoryID];
+               }
+             });
+           } // Rebuild _this.collection after changing presets and categories
+
+
+           _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
+
+           if (d.defaults) {
+             Object.keys(d.defaults).forEach(function (geometry) {
+               var def = d.defaults[geometry];
+
+               if (Array.isArray(def)) {
+                 // add or replace
+                 _defaults[geometry] = presetCollection(def.map(function (id) {
+                   return _presets[id] || _categories[id];
+                 }).filter(Boolean));
+               } else {
+                 // remove
+                 delete _defaults[geometry];
+               }
+             });
+           } // Rebuild universal fields array
+
+
+           _universal = Object.values(_fields).filter(function (field) {
+             return field.universal;
+           }); // Reset all the preset fields - they'll need to be resolved again
+
+           Object.values(_presets).forEach(function (preset) {
+             return preset.resetFields();
+           }); // Rebuild geometry index
+
+           _geometryIndex = {
+             point: {},
+             vertex: {},
+             line: {},
+             area: {},
+             relation: {}
+           };
+
+           _this.collection.forEach(function (preset) {
+             (preset.geometry || []).forEach(function (geometry) {
+               var g = _geometryIndex[geometry];
+
+               for (var key in preset.tags) {
+                 g[key] = g[key] || {};
+                 var value = preset.tags[key];
+                 (g[key][value] = g[key][value] || []).push(preset);
+               }
+             });
+           }); // Merge Custom Features
+
+
+           if (d.featureCollection && Array.isArray(d.featureCollection.features)) {
+             _mainLocations.mergeCustomGeoJSON(d.featureCollection);
+           } // Resolve all locationSet features.
+
+
+           if (newLocationSets.length) {
+             _mainLocations.mergeLocationSets(newLocationSets);
+           }
+
+           return _this;
+         };
+
+         _this.match = function (entity, resolver) {
+           return resolver["transient"](entity, 'presetMatch', function () {
+             var geometry = entity.geometry(resolver); // Treat entities on addr:interpolation lines as points, not vertices - #3241
+
+             if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
+               geometry = 'point';
+             }
+
+             var entityExtent = entity.extent(resolver);
+             return _this.matchTags(entity.tags, geometry, entityExtent.center());
+           });
+         };
+
+         _this.matchTags = function (tags, geometry, loc) {
+           var keyIndex = _geometryIndex[geometry];
+           var bestScore = -1;
+           var bestMatch;
+           var matchCandidates = [];
+
+           for (var k in tags) {
+             var indexMatches = [];
+             var valueIndex = keyIndex[k];
+             if (!valueIndex) continue;
+             var keyValueMatches = valueIndex[tags[k]];
+             if (keyValueMatches) indexMatches.push.apply(indexMatches, _toConsumableArray(keyValueMatches));
+             var keyStarMatches = valueIndex['*'];
+             if (keyStarMatches) indexMatches.push.apply(indexMatches, _toConsumableArray(keyStarMatches));
+             if (indexMatches.length === 0) continue;
+
+             for (var i = 0; i < indexMatches.length; i++) {
+               var candidate = indexMatches[i];
+               var score = candidate.matchScore(tags);
+
+               if (score === -1) {
+                 continue;
+               }
+
+               matchCandidates.push({
+                 score: score,
+                 candidate: candidate
+               });
+
+               if (score > bestScore) {
+                 bestScore = score;
+                 bestMatch = candidate;
+               }
+             }
+           }
+
+           if (bestMatch && bestMatch.locationSetID && bestMatch.locationSetID !== '+[Q2]' && Array.isArray(loc)) {
+             var validLocations = _mainLocations.locationsAt(loc);
+
+             if (!validLocations[bestMatch.locationSetID]) {
+               matchCandidates.sort(function (a, b) {
+                 return a.score < b.score ? 1 : -1;
+               });
+
+               for (var _i = 0; _i < matchCandidates.length; _i++) {
+                 var candidateScore = matchCandidates[_i];
+
+                 if (!candidateScore.candidate.locationSetID || validLocations[candidateScore.candidate.locationSetID]) {
+                   bestMatch = candidateScore.candidate;
+                   bestScore = candidateScore.score;
+                   break;
+                 }
+               }
+             }
+           } // If any part of an address is present, allow fallback to "Address" preset - #4353
+
+
+           if (!bestMatch || bestMatch.isFallback()) {
+             for (var _k in tags) {
+               if (/^addr:/.test(_k) && keyIndex['addr:*'] && keyIndex['addr:*']['*']) {
+                 bestMatch = keyIndex['addr:*']['*'][0];
+                 break;
+               }
+             }
+           }
+
+           return bestMatch || _this.fallback(geometry);
+         };
+
+         _this.allowsVertex = function (entity, resolver) {
+           if (entity.type !== 'node') return false;
+           if (Object.keys(entity.tags).length === 0) return true;
+           return resolver["transient"](entity, 'vertexMatch', function () {
+             // address lines allow vertices to act as standalone points
+             if (entity.isOnAddressLine(resolver)) return true;
+             var geometries = osmNodeGeometriesForTags(entity.tags);
+             if (geometries.vertex) return true;
+             if (geometries.point) return false; // allow vertices for unspecified points
+
+             return true;
+           });
+         }; // Because of the open nature of tagging, iD will never have a complete
+         // list of tags used in OSM, so we want it to have logic like "assume
+         // that a closed way with an amenity tag is an area, unless the amenity
+         // is one of these specific types". This function computes a structure
+         // that allows testing of such conditions, based on the presets designated
+         // as as supporting (or not supporting) the area geometry.
+         //
+         // The returned object L is a keeplist/discardlist of tags. A closed way
+         // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
+         // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
+         // and the subkeys form the discardlist.
+
+
+         _this.areaKeys = function () {
+           // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
+           var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
+           var areaKeys = {}; // ignore name-suggestion-index and deprecated presets
+
+           var presets = _this.collection.filter(function (p) {
+             return !p.suggestion && !p.replacement;
+           }); // keeplist
+
+
+           presets.forEach(function (p) {
+             var keys = p.tags && Object.keys(p.tags);
+             var key = keys && keys.length && keys[0]; // pick the first tag
+
+             if (!key) return;
+             if (ignore.indexOf(key) !== -1) return;
+
+             if (p.geometry.indexOf('area') !== -1) {
+               // probably an area..
+               areaKeys[key] = areaKeys[key] || {};
+             }
+           }); // discardlist
+
+           presets.forEach(function (p) {
+             var key;
+
+             for (key in p.addTags) {
+               // examine all addTags to get a better sense of what can be tagged on lines - #6800
+               var value = p.addTags[key];
+
+               if (key in areaKeys && // probably an area...
+               p.geometry.indexOf('line') !== -1 && // but sometimes a line
+               value !== '*') {
+                 areaKeys[key][value] = true;
+               }
+             }
+           });
+           return areaKeys;
+         };
+
+         _this.pointTags = function () {
+           return _this.collection.reduce(function (pointTags, d) {
+             // ignore name-suggestion-index, deprecated, and generic presets
+             if (d.suggestion || d.replacement || d.searchable === false) return pointTags; // only care about the primary tag
+
+             var keys = d.tags && Object.keys(d.tags);
+             var key = keys && keys.length && keys[0]; // pick the first tag
+
+             if (!key) return pointTags; // if this can be a point
+
+             if (d.geometry.indexOf('point') !== -1) {
+               pointTags[key] = pointTags[key] || {};
+               pointTags[key][d.tags[key]] = true;
+             }
+
+             return pointTags;
+           }, {});
+         };
+
+         _this.vertexTags = function () {
+           return _this.collection.reduce(function (vertexTags, d) {
+             // ignore name-suggestion-index, deprecated, and generic presets
+             if (d.suggestion || d.replacement || d.searchable === false) return vertexTags; // only care about the primary tag
+
+             var keys = d.tags && Object.keys(d.tags);
+             var key = keys && keys.length && keys[0]; // pick the first tag
+
+             if (!key) return vertexTags; // if this can be a vertex
+
+             if (d.geometry.indexOf('vertex') !== -1) {
+               vertexTags[key] = vertexTags[key] || {};
+               vertexTags[key][d.tags[key]] = true;
+             }
+
+             return vertexTags;
+           }, {});
+         };
+
+         _this.field = function (id) {
+           return _fields[id];
+         };
+
+         _this.universal = function () {
+           return _universal;
+         };
+
+         _this.defaults = function (geometry, n, startWithRecents, loc) {
+           var recents = [];
+
+           if (startWithRecents) {
+             recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
+           }
+
+           var defaults;
+
+           if (_addablePresetIDs) {
+             defaults = Array.from(_addablePresetIDs).map(function (id) {
+               var preset = _this.item(id);
+
+               if (preset && preset.matchGeometry(geometry)) return preset;
+               return null;
+             }).filter(Boolean);
+           } else {
+             defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
+           }
+
+           var result = presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
+
+           if (Array.isArray(loc)) {
+             var validLocations = _mainLocations.locationsAt(loc);
+             result.collection = result.collection.filter(function (a) {
+               return !a.locationSetID || validLocations[a.locationSetID];
+             });
+           }
+
+           return result;
+         }; // pass a Set of addable preset ids
+
+
+         _this.addablePresetIDs = function (val) {
+           if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
+
+           if (Array.isArray(val)) val = new Set(val);
+           _addablePresetIDs = val;
+
+           if (_addablePresetIDs) {
+             // reset all presets
+             _this.collection.forEach(function (p) {
+               // categories aren't addable
+               if (p.addable) p.addable(_addablePresetIDs.has(p.id));
+             });
+           } else {
+             _this.collection.forEach(function (p) {
+               if (p.addable) p.addable(true);
+             });
+           }
+
+           return _this;
+         };
+
+         _this.recent = function () {
+           return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
+             return d.preset;
+           })));
+         };
+
+         function RibbonItem(preset, source) {
+           var item = {};
+           item.preset = preset;
+           item.source = source;
+
+           item.isFavorite = function () {
+             return item.source === 'favorite';
+           };
+
+           item.isRecent = function () {
+             return item.source === 'recent';
+           };
+
+           item.matches = function (preset) {
+             return item.preset.id === preset.id;
+           };
+
+           item.minified = function () {
+             return {
+               pID: item.preset.id
+             };
+           };
+
+           return item;
+         }
+
+         function ribbonItemForMinified(d, source) {
+           if (d && d.pID) {
+             var preset = _this.item(d.pID);
+
+             if (!preset) return null;
+             return RibbonItem(preset, source);
+           }
+
+           return null;
+         }
+
+         _this.getGenericRibbonItems = function () {
+           return ['point', 'line', 'area'].map(function (id) {
+             return RibbonItem(_this.item(id), 'generic');
+           });
+         };
+
+         _this.getAddable = function () {
+           if (!_addablePresetIDs) return [];
+           return _addablePresetIDs.map(function (id) {
+             var preset = _this.item(id);
+
+             if (preset) return RibbonItem(preset, 'addable');
+             return null;
+           }).filter(Boolean);
+         };
+
+         function setRecents(items) {
+           _recents = items;
+           var minifiedItems = items.map(function (d) {
+             return d.minified();
+           });
+           corePreferences('preset_recents', JSON.stringify(minifiedItems));
+           dispatch.call('recentsChange');
+         }
+
+         _this.getRecents = function () {
+           if (!_recents) {
+             // fetch from local storage
+             _recents = (JSON.parse(corePreferences('preset_recents')) || []).reduce(function (acc, d) {
+               var item = ribbonItemForMinified(d, 'recent');
+               if (item && item.preset.addable()) acc.push(item);
+               return acc;
+             }, []);
+           }
+
+           return _recents;
+         };
+
+         _this.addRecent = function (preset, besidePreset, after) {
+           var recents = _this.getRecents();
+
+           var beforeItem = _this.recentMatching(besidePreset);
+
+           var toIndex = recents.indexOf(beforeItem);
+           if (after) toIndex += 1;
+           var newItem = RibbonItem(preset, 'recent');
+           recents.splice(toIndex, 0, newItem);
+           setRecents(recents);
+         };
+
+         _this.removeRecent = function (preset) {
+           var item = _this.recentMatching(preset);
+
+           if (item) {
+             var items = _this.getRecents();
+
+             items.splice(items.indexOf(item), 1);
+             setRecents(items);
+           }
+         };
+
+         _this.recentMatching = function (preset) {
+           var items = _this.getRecents();
+
+           for (var i in items) {
+             if (items[i].matches(preset)) {
+               return items[i];
+             }
+           }
+
+           return null;
+         };
+
+         _this.moveItem = function (items, fromIndex, toIndex) {
+           if (fromIndex === toIndex || fromIndex < 0 || toIndex < 0 || fromIndex >= items.length || toIndex >= items.length) return null;
+           items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
+           return items;
+         };
+
+         _this.moveRecent = function (item, beforeItem) {
+           var recents = _this.getRecents();
+
+           var fromIndex = recents.indexOf(item);
+           var toIndex = recents.indexOf(beforeItem);
+
+           var items = _this.moveItem(recents, fromIndex, toIndex);
+
+           if (items) setRecents(items);
+         };
+
+         _this.setMostRecent = function (preset) {
+           if (preset.searchable === false) return;
+
+           var items = _this.getRecents();
+
+           var item = _this.recentMatching(preset);
+
+           if (item) {
+             items.splice(items.indexOf(item), 1);
+           } else {
+             item = RibbonItem(preset, 'recent');
+           } // remove the last recent (first in, first out)
+
+
+           while (items.length >= MAXRECENTS) {
+             items.pop();
+           } // prepend array
+
+
+           items.unshift(item);
+           setRecents(items);
+         };
+
+         function setFavorites(items) {
+           _favorites = items;
+           var minifiedItems = items.map(function (d) {
+             return d.minified();
+           });
+           corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
+
+           dispatch.call('favoritePreset');
+         }
+
+         _this.addFavorite = function (preset, besidePreset, after) {
+           var favorites = _this.getFavorites();
+
+           var beforeItem = _this.favoriteMatching(besidePreset);
+
+           var toIndex = favorites.indexOf(beforeItem);
+           if (after) toIndex += 1;
+           var newItem = RibbonItem(preset, 'favorite');
+           favorites.splice(toIndex, 0, newItem);
+           setFavorites(favorites);
+         };
+
+         _this.toggleFavorite = function (preset) {
+           var favs = _this.getFavorites();
+
+           var favorite = _this.favoriteMatching(preset);
+
+           if (favorite) {
+             favs.splice(favs.indexOf(favorite), 1);
+           } else {
+             // only allow 10 favorites
+             if (favs.length === 10) {
+               // remove the last favorite (last in, first out)
+               favs.pop();
+             } // append array
+
+
+             favs.push(RibbonItem(preset, 'favorite'));
+           }
+
+           setFavorites(favs);
+         };
+
+         _this.removeFavorite = function (preset) {
+           var item = _this.favoriteMatching(preset);
+
+           if (item) {
+             var items = _this.getFavorites();
+
+             items.splice(items.indexOf(item), 1);
+             setFavorites(items);
+           }
+         };
+
+         _this.getFavorites = function () {
+           if (!_favorites) {
+             // fetch from local storage
+             var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
+
+             if (!rawFavorites) {
+               rawFavorites = [];
+               corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+             }
+
+             _favorites = rawFavorites.reduce(function (output, d) {
+               var item = ribbonItemForMinified(d, 'favorite');
+               if (item && item.preset.addable()) output.push(item);
+               return output;
+             }, []);
+           }
+
+           return _favorites;
+         };
+
+         _this.favoriteMatching = function (preset) {
+           var favs = _this.getFavorites();
+
+           for (var index in favs) {
+             if (favs[index].matches(preset)) {
+               return favs[index];
+             }
+           }
+
+           return null;
+         };
+
+         return utilRebind(_this, dispatch, 'on');
+       }
+
+       function utilTagText(entity) {
+         var obj = entity && entity.tags || {};
+         return Object.keys(obj).map(function (k) {
+           return k + '=' + obj[k];
+         }).join(', ');
+       }
+       function utilTotalExtent(array, graph) {
+         var extent = geoExtent();
+         var val, entity;
+
+         for (var i = 0; i < array.length; i++) {
+           val = array[i];
+           entity = typeof val === 'string' ? graph.hasEntity(val) : val;
+
+           if (entity) {
+             extent._extend(entity.extent(graph));
+           }
+         }
+
+         return extent;
+       }
+       function utilTagDiff(oldTags, newTags) {
+         var tagDiff = [];
+         var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
+         keys.forEach(function (k) {
+           var oldVal = oldTags[k];
+           var newVal = newTags[k];
+
+           if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
+             tagDiff.push({
+               type: '-',
+               key: k,
+               oldVal: oldVal,
+               newVal: newVal,
+               display: '- ' + k + '=' + oldVal
+             });
+           }
+
+           if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
+             tagDiff.push({
+               type: '+',
+               key: k,
+               oldVal: oldVal,
+               newVal: newVal,
+               display: '+ ' + k + '=' + newVal
+             });
+           }
+         });
+         return tagDiff;
+       }
+       function utilEntitySelector(ids) {
+         return ids.length ? '.' + ids.join(',.') : 'nothing';
+       } // returns an selector to select entity ids for:
+       //  - entityIDs passed in
+       //  - shallow descendant entityIDs for any of those entities that are relations
+
+       function utilEntityOrMemberSelector(ids, graph) {
+         var seen = new Set(ids);
+         ids.forEach(collectShallowDescendants);
+         return utilEntitySelector(Array.from(seen));
+
+         function collectShallowDescendants(id) {
+           var entity = graph.hasEntity(id);
+           if (!entity || entity.type !== 'relation') return;
+           entity.members.map(function (member) {
+             return member.id;
+           }).forEach(function (id) {
+             seen.add(id);
+           });
+         }
+       } // returns an selector to select entity ids for:
+       //  - entityIDs passed in
+       //  - deep descendant entityIDs for any of those entities that are relations
+
+       function utilEntityOrDeepMemberSelector(ids, graph) {
+         return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
+       } // returns an selector to select entity ids for:
+       //  - entityIDs passed in
+       //  - deep descendant entityIDs for any of those entities that are relations
+
+       function utilEntityAndDeepMemberIDs(ids, graph) {
+         var seen = new Set();
+         ids.forEach(collectDeepDescendants);
+         return Array.from(seen);
+
+         function collectDeepDescendants(id) {
+           if (seen.has(id)) return;
+           seen.add(id);
+           var entity = graph.hasEntity(id);
+           if (!entity || entity.type !== 'relation') return;
+           entity.members.map(function (member) {
+             return member.id;
+           }).forEach(collectDeepDescendants); // recurse
+         }
+       } // returns an selector to select entity ids for:
+       //  - deep descendant entityIDs for any of those entities that are relations
+
+       function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
+         var idsSet = new Set(ids);
+         var seen = new Set();
+         var returners = new Set();
+         ids.forEach(collectDeepDescendants);
+         return utilEntitySelector(Array.from(returners));
+
+         function collectDeepDescendants(id) {
+           if (seen.has(id)) return;
+           seen.add(id);
+
+           if (!idsSet.has(id)) {
+             returners.add(id);
+           }
+
+           var entity = graph.hasEntity(id);
+           if (!entity || entity.type !== 'relation') return;
+           if (skipMultipolgonMembers && entity.isMultipolygon()) return;
+           entity.members.map(function (member) {
+             return member.id;
+           }).forEach(collectDeepDescendants); // recurse
+         }
+       } // Adds or removes highlight styling for the specified entities
+
+       function utilHighlightEntities(ids, highlighted, context) {
+         context.surface().selectAll(utilEntityOrDeepMemberSelector(ids, context.graph())).classed('highlighted', highlighted);
+       } // returns an Array that is the union of:
+       //  - nodes for any nodeIDs passed in
+       //  - child nodes of any wayIDs passed in
+       //  - descendant member and child nodes of relationIDs passed in
+
+       function utilGetAllNodes(ids, graph) {
+         var seen = new Set();
+         var nodes = new Set();
+         ids.forEach(collectNodes);
+         return Array.from(nodes);
+
+         function collectNodes(id) {
+           if (seen.has(id)) return;
+           seen.add(id);
+           var entity = graph.hasEntity(id);
+           if (!entity) return;
+
+           if (entity.type === 'node') {
+             nodes.add(entity);
+           } else if (entity.type === 'way') {
+             entity.nodes.forEach(collectNodes);
+           } else {
+             entity.members.map(function (member) {
+               return member.id;
+             }).forEach(collectNodes); // recurse
+           }
+         }
+       }
+       function utilDisplayName(entity) {
+         var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
+         var name = entity.tags[localizedNameKey] || entity.tags.name || '';
+         if (name) return name;
+         var tags = {
+           direction: entity.tags.direction,
+           from: entity.tags.from,
+           network: entity.tags.cycle_network || entity.tags.network,
+           ref: entity.tags.ref,
+           to: entity.tags.to,
+           via: entity.tags.via
+         };
+         var keyComponents = [];
+
+         if (tags.network) {
+           keyComponents.push('network');
+         }
+
+         if (tags.ref) {
+           keyComponents.push('ref');
+         } // Routes may need more disambiguation based on direction or destination
+
+
+         if (entity.tags.route) {
+           if (tags.direction) {
+             keyComponents.push('direction');
+           } else if (tags.from && tags.to) {
+             keyComponents.push('from');
+             keyComponents.push('to');
+
+             if (tags.via) {
+               keyComponents.push('via');
+             }
+           }
+         }
+
+         if (keyComponents.length) {
+           name = _t('inspector.display_name.' + keyComponents.join('_'), tags);
+         }
+
+         return name;
+       }
+       function utilDisplayNameForPath(entity) {
+         var name = utilDisplayName(entity);
+         var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
+         var isNewChromium = Number(utilDetect().version.split('.')[0]) >= 96.0;
+
+         if (!isFirefox && !isNewChromium && name && rtlRegex.test(name)) {
+           name = fixRTLTextForSvg(name);
+         }
+
+         return name;
+       }
+       function utilDisplayType(id) {
+         return {
+           n: _t('inspector.node'),
+           w: _t('inspector.way'),
+           r: _t('inspector.relation')
+         }[id.charAt(0)];
+       } // `utilDisplayLabel`
+       // Returns a string suitable for display
+       // By default returns something like name/ref, fallback to preset type, fallback to OSM type
+       //   "Main Street" or "Tertiary Road"
+       // If `verbose=true`, include both preset name and feature name.
+       //   "Tertiary Road Main Street"
+       //
+
+       function utilDisplayLabel(entity, graphOrGeometry, verbose) {
+         var result;
+         var displayName = utilDisplayName(entity);
+         var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
+         var presetName = preset && (preset.suggestion ? preset.subtitle() : preset.name());
+
+         if (verbose) {
+           result = [presetName, displayName].filter(Boolean).join(' ');
+         } else {
+           result = displayName || presetName;
+         } // Fallback to the OSM type (node/way/relation)
+
+
+         return result || utilDisplayType(entity.id);
+       }
+       function utilEntityRoot(entityType) {
+         return {
+           node: 'n',
+           way: 'w',
+           relation: 'r'
+         }[entityType];
+       } // Returns a single object containing the tags of all the given entities.
+       // Example:
+       // {
+       //   highway: 'service',
+       //   service: 'parking_aisle'
+       // }
+       //           +
+       // {
+       //   highway: 'service',
+       //   service: 'driveway',
+       //   width: '3'
+       // }
+       //           =
+       // {
+       //   highway: 'service',
+       //   service: [ 'driveway', 'parking_aisle' ],
+       //   width: [ '3', undefined ]
+       // }
+
+       function utilCombinedTags(entityIDs, graph) {
+         var tags = {};
+         var tagCounts = {};
+         var allKeys = new Set();
+         var entities = entityIDs.map(function (entityID) {
+           return graph.hasEntity(entityID);
+         }).filter(Boolean); // gather the aggregate keys
+
+         entities.forEach(function (entity) {
+           var keys = Object.keys(entity.tags).filter(Boolean);
+           keys.forEach(function (key) {
+             allKeys.add(key);
+           });
+         });
+         entities.forEach(function (entity) {
+           allKeys.forEach(function (key) {
+             var value = entity.tags[key]; // purposely allow `undefined`
+
+             if (!tags.hasOwnProperty(key)) {
+               // first value, set as raw
+               tags[key] = value;
+             } else {
+               if (!Array.isArray(tags[key])) {
+                 if (tags[key] !== value) {
+                   // first alternate value, replace single value with array
+                   tags[key] = [tags[key], value];
+                 }
+               } else {
+                 // type is array
+                 if (tags[key].indexOf(value) === -1) {
+                   // subsequent alternate value, add to array
+                   tags[key].push(value);
+                 }
+               }
+             }
+
+             var tagHash = key + '=' + value;
+             if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
+             tagCounts[tagHash] += 1;
+           });
+         });
+
+         for (var key in tags) {
+           if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
+
+           tags[key] = tags[key].sort(function (val1, val2) {
+             var key = key; // capture
+
+             var count2 = tagCounts[key + '=' + val2];
+             var count1 = tagCounts[key + '=' + val1];
+
+             if (count2 !== count1) {
+               return count2 - count1;
+             }
+
+             if (val2 && val1) {
+               return val1.localeCompare(val2);
+             }
+
+             return val1 ? 1 : -1;
+           });
+         }
+
+         return tags;
+       }
+       function utilStringQs(str) {
+         var i = 0; // advance past any leading '?' or '#' characters
+
+         while (i < str.length && (str[i] === '?' || str[i] === '#')) {
+           i++;
+         }
+
+         str = str.slice(i);
+         return str.split('&').reduce(function (obj, pair) {
+           var parts = pair.split('=');
+
+           if (parts.length === 2) {
+             obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+           }
+
+           return obj;
+         }, {});
+       }
+       function utilQsString(obj, noencode) {
+         // encode everything except special characters used in certain hash parameters:
+         // "/" in map states, ":", ",", {" and "}" in background
+         function softEncode(s) {
+           return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
+         }
+
+         return Object.keys(obj).sort().map(function (key) {
+           return encodeURIComponent(key) + '=' + (noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
+         }).join('&');
+       }
+       function utilPrefixDOMProperty(property) {
+         var prefixes = ['webkit', 'ms', 'moz', 'o'];
+         var i = -1;
+         var n = prefixes.length;
+         var s = document.body;
+         if (property in s) return property;
+         property = property.substr(0, 1).toUpperCase() + property.substr(1);
+
+         while (++i < n) {
+           if (prefixes[i] + property in s) {
+             return prefixes[i] + property;
+           }
+         }
+
+         return false;
+       }
+       function utilPrefixCSSProperty(property) {
+         var prefixes = ['webkit', 'ms', 'Moz', 'O'];
+         var i = -1;
+         var n = prefixes.length;
+         var s = document.body.style;
+
+         if (property.toLowerCase() in s) {
+           return property.toLowerCase();
+         }
+
+         while (++i < n) {
+           if (prefixes[i] + property in s) {
+             return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
+           }
+         }
+
+         return false;
+       }
+       var transformProperty;
+       function utilSetTransform(el, x, y, scale) {
+         var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
+         var translate = utilDetect().opera ? 'translate(' + x + 'px,' + y + 'px)' : 'translate3d(' + x + 'px,' + y + 'px,0)';
+         return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
+       } // Calculates Levenshtein distance between two strings
+       // see:  https://en.wikipedia.org/wiki/Levenshtein_distance
+       // first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
+
+       function utilEditDistance(a, b) {
+         a = remove$6(a.toLowerCase());
+         b = remove$6(b.toLowerCase());
+         if (a.length === 0) return b.length;
+         if (b.length === 0) return a.length;
+         var matrix = [];
+         var i, j;
+
+         for (i = 0; i <= b.length; i++) {
+           matrix[i] = [i];
+         }
+
+         for (j = 0; j <= a.length; j++) {
+           matrix[0][j] = j;
+         }
+
+         for (i = 1; i <= b.length; i++) {
+           for (j = 1; j <= a.length; j++) {
+             if (b.charAt(i - 1) === a.charAt(j - 1)) {
+               matrix[i][j] = matrix[i - 1][j - 1];
+             } else {
+               matrix[i][j] = Math.min(matrix[i - 1][j - 1] + 1, // substitution
+               Math.min(matrix[i][j - 1] + 1, // insertion
+               matrix[i - 1][j] + 1)); // deletion
+             }
+           }
+         }
+
+         return matrix[b.length][a.length];
+       } // a d3.mouse-alike which
+       // 1. Only works on HTML elements, not SVG
+       // 2. Does not cause style recalculation
+
+       function utilFastMouse(container) {
+         var rect = container.getBoundingClientRect();
+         var rectLeft = rect.left;
+         var rectTop = rect.top;
+         var clientLeft = +container.clientLeft;
+         var clientTop = +container.clientTop;
+         return function (e) {
+           return [e.clientX - rectLeft - clientLeft, e.clientY - rectTop - clientTop];
+         };
+       }
+       function utilAsyncMap(inputs, func, callback) {
+         var remaining = inputs.length;
+         var results = [];
+         var errors = [];
+         inputs.forEach(function (d, i) {
+           func(d, function done(err, data) {
+             errors[i] = err;
+             results[i] = data;
+             remaining--;
+             if (!remaining) callback(errors, results);
+           });
+         });
+       } // wraps an index to an interval [0..length-1]
+
+       function utilWrap(index, length) {
+         if (index < 0) {
+           index += Math.ceil(-index / length) * length;
+         }
+
+         return index % length;
+       }
+       /**
+        * a replacement for functor
+        *
+        * @param {*} value any value
+        * @returns {Function} a function that returns that value or the value if it's a function
+        */
+
+       function utilFunctor(value) {
+         if (typeof value === 'function') return value;
+         return function () {
+           return value;
+         };
+       }
+       function utilNoAuto(selection) {
+         var isText = selection.size() && selection.node().tagName.toLowerCase() === 'textarea';
+         return selection // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
+         .attr('autocomplete', 'new-password').attr('autocorrect', 'off').attr('autocapitalize', 'off').attr('spellcheck', isText ? 'true' : 'false');
+       } // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
+       // https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
+
+       function utilHashcode(str) {
+         var hash = 0;
+
+         if (str.length === 0) {
+           return hash;
+         }
+
+         for (var i = 0; i < str.length; i++) {
+           var _char = str.charCodeAt(i);
+
+           hash = (hash << 5) - hash + _char;
+           hash = hash & hash; // Convert to 32bit integer
+         }
+
+         return hash;
+       } // Returns version of `str` with all runs of special characters replaced by `_`;
+       // suitable for HTML ids, classes, selectors, etc.
+
+       function utilSafeClassName(str) {
+         return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
+       } // Returns string based on `val` that is highly unlikely to collide with an id
+       // used previously or that's present elsewhere in the document. Useful for preventing
+       // browser-provided autofills or when embedding iD on pages with unknown elements.
+
+       function utilUniqueDomId(val) {
+         return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
+       } // Returns the length of `str` in unicode characters. This can be less than
+       // `String.length()` since a single unicode character can be composed of multiple
+       // JavaScript UTF-16 code units.
+
+       function utilUnicodeCharsCount(str) {
+         // Native ES2015 implementations of `Array.from` split strings into unicode characters
+         return Array.from(str).length;
+       } // Returns a new string representing `str` cut from its start to `limit` length
+       // in unicode characters. Note that this runs the risk of splitting graphemes.
+
+       function utilUnicodeCharsTruncated(str, limit) {
+         return Array.from(str).slice(0, limit).join('');
+       }
+
+       function toNumericID(id) {
+         var match = id.match(/^[cnwr](-?\d+)$/);
+
+         if (match) {
+           return parseInt(match[1], 10);
+         }
+
+         return NaN;
+       }
+
+       function compareNumericIDs(left, right) {
+         if (isNaN(left) && isNaN(right)) return -1;
+         if (isNaN(left)) return 1;
+         if (isNaN(right)) return -1;
+         if (Math.sign(left) !== Math.sign(right)) return -Math.sign(left);
+         if (Math.sign(left) < 0) return Math.sign(right - left);
+         return Math.sign(left - right);
+       } // Returns -1 if the first parameter ID is older than the second,
+       // 1 if the second parameter is older, 0 if they are the same.
+       // If both IDs are test IDs, the function returns -1.
+
+
+       function utilCompareIDs(left, right) {
+         return compareNumericIDs(toNumericID(left), toNumericID(right));
+       } // Returns the chronologically oldest ID in the list.
+       // Database IDs (with positive numbers) before editor ones (with negative numbers).
+       // Among each category, the closest number to 0 is the oldest.
+       // Test IDs (any string that does not conform to OSM's ID scheme) are taken last.
+
+       function utilOldestID(ids) {
+         if (ids.length === 0) {
+           return undefined;
+         }
+
+         var oldestIDIndex = 0;
+         var oldestID = toNumericID(ids[0]);
+
+         for (var i = 1; i < ids.length; i++) {
+           var num = toNumericID(ids[i]);
+
+           if (compareNumericIDs(oldestID, num) === 1) {
+             oldestIDIndex = i;
+             oldestID = num;
+           }
+         }
+
+         return ids[oldestIDIndex];
+       }
+
+       function osmEntity(attrs) {
+         // For prototypal inheritance.
+         if (this instanceof osmEntity) return; // Create the appropriate subtype.
+
+         if (attrs && attrs.type) {
+           return osmEntity[attrs.type].apply(this, arguments);
+         } else if (attrs && attrs.id) {
+           return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
+         } // Initialize a generic Entity (used only in tests).
+
+
+         return new osmEntity().initialize(arguments);
+       }
+
+       osmEntity.id = function (type) {
+         return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
+       };
+
+       osmEntity.id.next = {
+         changeset: -1,
+         node: -1,
+         way: -1,
+         relation: -1
+       };
+
+       osmEntity.id.fromOSM = function (type, id) {
+         return type[0] + id;
+       };
+
+       osmEntity.id.toOSM = function (id) {
+         var match = id.match(/^[cnwr](-?\d+)$/);
+
+         if (match) {
+           return match[1];
+         }
+
+         return '';
+       };
+
+       osmEntity.id.type = function (id) {
+         return {
+           'c': 'changeset',
+           'n': 'node',
+           'w': 'way',
+           'r': 'relation'
+         }[id[0]];
+       }; // A function suitable for use as the second argument to d3.selection#data().
+
+
+       osmEntity.key = function (entity) {
+         return entity.id + 'v' + (entity.v || 0);
+       };
+
+       var _deprecatedTagValuesByKey;
+
+       osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
+         if (!_deprecatedTagValuesByKey) {
+           _deprecatedTagValuesByKey = {};
+           dataDeprecated.forEach(function (d) {
+             var oldKeys = Object.keys(d.old);
+
+             if (oldKeys.length === 1) {
+               var oldKey = oldKeys[0];
+               var oldValue = d.old[oldKey];
+
+               if (oldValue !== '*') {
+                 if (!_deprecatedTagValuesByKey[oldKey]) {
+                   _deprecatedTagValuesByKey[oldKey] = [oldValue];
+                 } else {
+                   _deprecatedTagValuesByKey[oldKey].push(oldValue);
+                 }
+               }
+             }
+           });
+         }
+
+         return _deprecatedTagValuesByKey;
+       };
+
+       osmEntity.prototype = {
+         tags: {},
+         initialize: function initialize(sources) {
+           for (var i = 0; i < sources.length; ++i) {
+             var source = sources[i];
+
+             for (var prop in source) {
+               if (Object.prototype.hasOwnProperty.call(source, prop)) {
+                 if (source[prop] === undefined) {
+                   delete this[prop];
+                 } else {
+                   this[prop] = source[prop];
+                 }
+               }
+             }
+           }
+
+           if (!this.id && this.type) {
+             this.id = osmEntity.id(this.type);
+           }
+
+           if (!this.hasOwnProperty('visible')) {
+             this.visible = true;
+           }
+
+           if (debug) {
+             Object.freeze(this);
+             Object.freeze(this.tags);
+             if (this.loc) Object.freeze(this.loc);
+             if (this.nodes) Object.freeze(this.nodes);
+             if (this.members) Object.freeze(this.members);
+           }
+
+           return this;
+         },
+         copy: function copy(resolver, copies) {
+           if (copies[this.id]) return copies[this.id];
+           var copy = osmEntity(this, {
+             id: undefined,
+             user: undefined,
+             version: undefined
+           });
+           copies[this.id] = copy;
+           return copy;
+         },
+         osmId: function osmId() {
+           return osmEntity.id.toOSM(this.id);
+         },
+         isNew: function isNew() {
+           var osmId = osmEntity.id.toOSM(this.id);
+           return osmId.length === 0 || osmId[0] === '-';
+         },
+         update: function update(attrs) {
+           return osmEntity(this, attrs, {
+             v: 1 + (this.v || 0)
+           });
+         },
+         mergeTags: function mergeTags(tags) {
+           var merged = Object.assign({}, this.tags); // shallow copy
+
+           var changed = false;
+
+           for (var k in tags) {
+             var t1 = merged[k];
+             var t2 = tags[k];
+
+             if (!t1) {
+               changed = true;
+               merged[k] = t2;
+             } else if (t1 !== t2) {
+               changed = true;
+               merged[k] = utilUnicodeCharsTruncated(utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'), 255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
+               );
+             }
+           }
+
+           return changed ? this.update({
+             tags: merged
+           }) : this;
+         },
+         intersects: function intersects(extent, resolver) {
+           return this.extent(resolver).intersects(extent);
+         },
+         hasNonGeometryTags: function hasNonGeometryTags() {
+           return Object.keys(this.tags).some(function (k) {
+             return k !== 'area';
+           });
+         },
+         hasParentRelations: function hasParentRelations(resolver) {
+           return resolver.parentRelations(this).length > 0;
+         },
+         hasInterestingTags: function hasInterestingTags() {
+           return Object.keys(this.tags).some(osmIsInterestingTag);
+         },
+         isHighwayIntersection: function isHighwayIntersection() {
+           return false;
+         },
+         isDegenerate: function isDegenerate() {
+           return true;
+         },
+         deprecatedTags: function deprecatedTags(dataDeprecated) {
+           var tags = this.tags; // if there are no tags, none can be deprecated
+
+           if (Object.keys(tags).length === 0) return [];
+           var deprecated = [];
+           dataDeprecated.forEach(function (d) {
+             var oldKeys = Object.keys(d.old);
+
+             if (d.replace) {
+               var hasExistingValues = Object.keys(d.replace).some(function (replaceKey) {
+                 if (!tags[replaceKey] || d.old[replaceKey]) return false;
+                 var replaceValue = d.replace[replaceKey];
+                 if (replaceValue === '*') return false;
+                 if (replaceValue === tags[replaceKey]) return false;
+                 return true;
+               }); // don't flag deprecated tags if the upgrade path would overwrite existing data - #7843
+
+               if (hasExistingValues) return;
+             }
+
+             var matchesDeprecatedTags = oldKeys.every(function (oldKey) {
+               if (!tags[oldKey]) return false;
+               if (d.old[oldKey] === '*') return true;
+               if (d.old[oldKey] === tags[oldKey]) return true;
+               var vals = tags[oldKey].split(';').filter(Boolean);
+
+               if (vals.length === 0) {
+                 return false;
+               } else if (vals.length > 1) {
+                 return vals.indexOf(d.old[oldKey]) !== -1;
+               } else {
+                 if (tags[oldKey] === d.old[oldKey]) {
+                   if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
+                     var replaceKeys = Object.keys(d.replace);
+                     return !replaceKeys.every(function (replaceKey) {
+                       return tags[replaceKey] === d.replace[replaceKey];
+                     });
+                   } else {
+                     return true;
+                   }
+                 }
+               }
+
+               return false;
+             });
+
+             if (matchesDeprecatedTags) {
+               deprecated.push(d);
+             }
+           });
+           return deprecated;
+         }
+       };
+
+       function osmLanes(entity) {
+         if (entity.type !== 'way') return null;
+         if (!entity.tags.highway) return null;
+         var tags = entity.tags;
+         var isOneWay = entity.isOneWay();
+         var laneCount = getLaneCount(tags, isOneWay);
+         var maxspeed = parseMaxspeed(tags);
+         var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
+         var forward = laneDirections.forward;
+         var backward = laneDirections.backward;
+         var bothways = laneDirections.bothways; // parse the piped string 'x|y|z' format
+
+         var turnLanes = {};
+         turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
+         turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
+         turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
+         var maxspeedLanes = {};
+         maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
+         maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
+         maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
+         var psvLanes = {};
+         psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
+         psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
+         psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
+         var busLanes = {};
+         busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
+         busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
+         busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
+         var taxiLanes = {};
+         taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
+         taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
+         taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
+         var hovLanes = {};
+         hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
+         hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
+         hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
+         var hgvLanes = {};
+         hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
+         hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
+         hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
+         var bicyclewayLanes = {};
+         bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
+         bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
+         bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
+         var lanesObj = {
+           forward: [],
+           backward: [],
+           unspecified: []
+         }; // map forward/backward/unspecified of each lane type to lanesObj
+
+         mapToLanesObj(lanesObj, turnLanes, 'turnLane');
+         mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
+         mapToLanesObj(lanesObj, psvLanes, 'psv');
+         mapToLanesObj(lanesObj, busLanes, 'bus');
+         mapToLanesObj(lanesObj, taxiLanes, 'taxi');
+         mapToLanesObj(lanesObj, hovLanes, 'hov');
+         mapToLanesObj(lanesObj, hgvLanes, 'hgv');
+         mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
+         return {
+           metadata: {
+             count: laneCount,
+             oneway: isOneWay,
+             forward: forward,
+             backward: backward,
+             bothways: bothways,
+             turnLanes: turnLanes,
+             maxspeed: maxspeed,
+             maxspeedLanes: maxspeedLanes,
+             psvLanes: psvLanes,
+             busLanes: busLanes,
+             taxiLanes: taxiLanes,
+             hovLanes: hovLanes,
+             hgvLanes: hgvLanes,
+             bicyclewayLanes: bicyclewayLanes
+           },
+           lanes: lanesObj
+         };
+       }
+
+       function getLaneCount(tags, isOneWay) {
+         var count;
 
-             if (matches(d3_event, binding, true)) {
-               binding.callback(d3_event);
-               didMatch = true; // match a max of one binding per event
+         if (tags.lanes) {
+           count = parseInt(tags.lanes, 10);
 
-               break;
-             }
+           if (count > 0) {
+             return count;
            }
+         }
 
-           if (didMatch) return; // then unshifted keybindings
+         switch (tags.highway) {
+           case 'trunk':
+           case 'motorway':
+             count = isOneWay ? 2 : 4;
+             break;
 
-           for (i = 0; i < bindings.length; i++) {
-             binding = bindings[i];
-             if (binding.event.modifiers.shiftKey) continue; // shift
+           default:
+             count = isOneWay ? 1 : 2;
+             break;
+         }
 
-             if (!!binding.capture !== isCapturing) continue;
+         return count;
+       }
 
-             if (matches(d3_event, binding, false)) {
-               binding.callback(d3_event);
-               break;
-             }
+       function parseMaxspeed(tags) {
+         var maxspeed = tags.maxspeed;
+         if (!maxspeed) return;
+         var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
+         if (!maxspeedRegex.test(maxspeed)) return;
+         return parseInt(maxspeed, 10);
+       }
+
+       function parseLaneDirections(tags, isOneWay, laneCount) {
+         var forward = parseInt(tags['lanes:forward'], 10);
+         var backward = parseInt(tags['lanes:backward'], 10);
+         var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
+
+         if (parseInt(tags.oneway, 10) === -1) {
+           forward = 0;
+           bothways = 0;
+           backward = laneCount;
+         } else if (isOneWay) {
+           forward = laneCount;
+           bothways = 0;
+           backward = 0;
+         } else if (isNaN(forward) && isNaN(backward)) {
+           backward = Math.floor((laneCount - bothways) / 2);
+           forward = laneCount - bothways - backward;
+         } else if (isNaN(forward)) {
+           if (backward > laneCount - bothways) {
+             backward = laneCount - bothways;
            }
 
-           function matches(d3_event, binding, testShift) {
-             var event = d3_event;
-             var isMatch = false;
-             var tryKeyCode = true; // Prefer a match on `KeyboardEvent.key`
+           forward = laneCount - bothways - backward;
+         } else if (isNaN(backward)) {
+           if (forward > laneCount - bothways) {
+             forward = laneCount - bothways;
+           }
 
-             if (event.key !== undefined) {
-               tryKeyCode = event.key.charCodeAt(0) > 255; // outside ISO-Latin-1
+           backward = laneCount - bothways - forward;
+         }
 
-               isMatch = true;
+         return {
+           forward: forward,
+           backward: backward,
+           bothways: bothways
+         };
+       }
 
-               if (binding.event.key === undefined) {
-                 isMatch = false;
-               } else if (Array.isArray(binding.event.key)) {
-                 if (binding.event.key.map(function (s) {
-                   return s.toLowerCase();
-                 }).indexOf(event.key.toLowerCase()) === -1) isMatch = false;
-               } else {
-                 if (event.key.toLowerCase() !== binding.event.key.toLowerCase()) isMatch = false;
-               }
-             } // Fallback match on `KeyboardEvent.keyCode`, can happen if:
-             // - browser doesn't support `KeyboardEvent.key`
-             // - `KeyboardEvent.key` is outside ISO-Latin-1 range (cyrillic?)
+       function parseTurnLanes(tag) {
+         if (!tag) return;
+         var validValues = ['left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right', 'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'];
+         return tag.split('|').map(function (s) {
+           if (s === '') s = 'none';
+           return s.split(';').map(function (d) {
+             return validValues.indexOf(d) === -1 ? 'unknown' : d;
+           });
+         });
+       }
 
+       function parseMaxspeedLanes(tag, maxspeed) {
+         if (!tag) return;
+         return tag.split('|').map(function (s) {
+           if (s === 'none') return s;
+           var m = parseInt(s, 10);
+           if (s === '' || m === maxspeed) return null;
+           return isNaN(m) ? 'unknown' : m;
+         });
+       }
 
-             if (!isMatch && tryKeyCode) {
-               isMatch = event.keyCode === binding.event.keyCode;
+       function parseMiscLanes(tag) {
+         if (!tag) return;
+         var validValues = ['yes', 'no', 'designated'];
+         return tag.split('|').map(function (s) {
+           if (s === '') s = 'no';
+           return validValues.indexOf(s) === -1 ? 'unknown' : s;
+         });
+       }
+
+       function parseBicycleWay(tag) {
+         if (!tag) return;
+         var validValues = ['yes', 'no', 'designated', 'lane'];
+         return tag.split('|').map(function (s) {
+           if (s === '') s = 'no';
+           return validValues.indexOf(s) === -1 ? 'unknown' : s;
+         });
+       }
+
+       function mapToLanesObj(lanesObj, data, key) {
+         if (data.forward) {
+           data.forward.forEach(function (l, i) {
+             if (!lanesObj.forward[i]) lanesObj.forward[i] = {};
+             lanesObj.forward[i][key] = l;
+           });
+         }
+
+         if (data.backward) {
+           data.backward.forEach(function (l, i) {
+             if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
+             lanesObj.backward[i][key] = l;
+           });
+         }
+
+         if (data.unspecified) {
+           data.unspecified.forEach(function (l, i) {
+             if (!lanesObj.unspecified[i]) lanesObj.unspecified[i] = {};
+             lanesObj.unspecified[i][key] = l;
+           });
+         }
+       }
+
+       function osmWay() {
+         if (!(this instanceof osmWay)) {
+           return new osmWay().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }
+       }
+       osmEntity.way = osmWay;
+       osmWay.prototype = Object.create(osmEntity.prototype);
+       Object.assign(osmWay.prototype, {
+         type: 'way',
+         nodes: [],
+         copy: function copy(resolver, copies) {
+           if (copies[this.id]) return copies[this.id];
+           var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+           var nodes = this.nodes.map(function (id) {
+             return resolver.entity(id).copy(resolver, copies).id;
+           });
+           copy = copy.update({
+             nodes: nodes
+           });
+           copies[this.id] = copy;
+           return copy;
+         },
+         extent: function extent(resolver) {
+           return resolver["transient"](this, 'extent', function () {
+             var extent = geoExtent();
+
+             for (var i = 0; i < this.nodes.length; i++) {
+               var node = resolver.hasEntity(this.nodes[i]);
+
+               if (node) {
+                 extent._extend(node.extent());
+               }
              }
 
-             if (!isMatch) return false; // test modifier keys
+             return extent;
+           });
+         },
+         first: function first() {
+           return this.nodes[0];
+         },
+         last: function last() {
+           return this.nodes[this.nodes.length - 1];
+         },
+         contains: function contains(node) {
+           return this.nodes.indexOf(node) >= 0;
+         },
+         affix: function affix(node) {
+           if (this.nodes[0] === node) return 'prefix';
+           if (this.nodes[this.nodes.length - 1] === node) return 'suffix';
+         },
+         layer: function layer() {
+           // explicit layer tag, clamp between -10, 10..
+           if (isFinite(this.tags.layer)) {
+             return Math.max(-10, Math.min(+this.tags.layer, 10));
+           } // implied layer tag..
 
-             if (!(event.ctrlKey && event.altKey)) {
-               // if both are set, assume AltGr and skip it - #4096
-               if (event.ctrlKey !== binding.event.modifiers.ctrlKey) return false;
-               if (event.altKey !== binding.event.modifiers.altKey) return false;
+
+           if (this.tags.covered === 'yes') return -1;
+           if (this.tags.location === 'overground') return 1;
+           if (this.tags.location === 'underground') return -1;
+           if (this.tags.location === 'underwater') return -10;
+           if (this.tags.power === 'line') return 10;
+           if (this.tags.power === 'minor_line') return 10;
+           if (this.tags.aerialway) return 10;
+           if (this.tags.bridge) return 1;
+           if (this.tags.cutting) return -1;
+           if (this.tags.tunnel) return -1;
+           if (this.tags.waterway) return -1;
+           if (this.tags.man_made === 'pipeline') return -10;
+           if (this.tags.boundary) return -10;
+           return 0;
+         },
+         // the approximate width of the line based on its tags except its `width` tag
+         impliedLineWidthMeters: function impliedLineWidthMeters() {
+           var averageWidths = {
+             highway: {
+               // width is for single lane
+               motorway: 5,
+               motorway_link: 5,
+               trunk: 4.5,
+               trunk_link: 4.5,
+               primary: 4,
+               secondary: 4,
+               tertiary: 4,
+               primary_link: 4,
+               secondary_link: 4,
+               tertiary_link: 4,
+               unclassified: 4,
+               road: 4,
+               living_street: 4,
+               bus_guideway: 4,
+               pedestrian: 4,
+               residential: 3.5,
+               service: 3.5,
+               track: 3,
+               cycleway: 2.5,
+               bridleway: 2,
+               corridor: 2,
+               steps: 2,
+               path: 1.5,
+               footway: 1.5
+             },
+             railway: {
+               // width includes ties and rail bed, not just track gauge
+               rail: 2.5,
+               light_rail: 2.5,
+               tram: 2.5,
+               subway: 2.5,
+               monorail: 2.5,
+               funicular: 2.5,
+               disused: 2.5,
+               preserved: 2.5,
+               miniature: 1.5,
+               narrow_gauge: 1.5
+             },
+             waterway: {
+               river: 50,
+               canal: 25,
+               stream: 5,
+               tidal_channel: 5,
+               fish_pass: 2.5,
+               drain: 2.5,
+               ditch: 1.5
              }
+           };
 
-             if (event.metaKey !== binding.event.modifiers.metaKey) return false;
-             if (testShift && event.shiftKey !== binding.event.modifiers.shiftKey) return false;
-             return true;
+           for (var key in averageWidths) {
+             if (this.tags[key] && averageWidths[key][this.tags[key]]) {
+               var width = averageWidths[key][this.tags[key]];
+
+               if (key === 'highway') {
+                 var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
+                 if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
+                 return width * laneCount;
+               }
+
+               return width;
+             }
            }
-         }
 
-         function capture(d3_event) {
-           testBindings(d3_event, true);
-         }
+           return null;
+         },
+         isOneWay: function isOneWay() {
+           // explicit oneway tag..
+           var values = {
+             'yes': true,
+             '1': true,
+             '-1': true,
+             'reversible': true,
+             'alternating': true,
+             'no': false,
+             '0': false
+           };
 
-         function bubble(d3_event) {
-           var tagName = select(d3_event.target).node().tagName;
+           if (values[this.tags.oneway] !== undefined) {
+             return values[this.tags.oneway];
+           } // implied oneway tag..
 
-           if (tagName === 'INPUT' || tagName === 'SELECT' || tagName === 'TEXTAREA') {
-             return;
+
+           for (var key in this.tags) {
+             if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) {
+               return true;
+             }
            }
 
-           testBindings(d3_event, false);
-         }
+           return false;
+         },
+         // Some identifier for tag that implies that this way is "sided",
+         // i.e. the right side is the 'inside' (e.g. the right side of a
+         // natural=cliff is lower).
+         sidednessIdentifier: function sidednessIdentifier() {
+           for (var key in this.tags) {
+             var value = this.tags[key];
 
-         function keybinding(selection) {
-           selection = selection || select(document);
-           selection.on('keydown.capture.' + namespace, capture, true);
-           selection.on('keydown.bubble.' + namespace, bubble, false);
-           return keybinding;
-         } // was: keybinding.off()
+             if (key in osmRightSideIsInsideTags && value in osmRightSideIsInsideTags[key]) {
+               if (osmRightSideIsInsideTags[key][value] === true) {
+                 return key;
+               } else {
+                 // if the map's value is something other than a
+                 // literal true, we should use it so we can
+                 // special case some keys (e.g. natural=coastline
+                 // is handled differently to other naturals).
+                 return osmRightSideIsInsideTags[key][value];
+               }
+             }
+           }
 
+           return null;
+         },
+         isSided: function isSided() {
+           if (this.tags.two_sided === 'yes') {
+             return false;
+           }
 
-         keybinding.unbind = function (selection) {
-           _keybindings = [];
-           selection = selection || select(document);
-           selection.on('keydown.capture.' + namespace, null);
-           selection.on('keydown.bubble.' + namespace, null);
-           return keybinding;
-         };
+           return this.sidednessIdentifier() !== null;
+         },
+         lanes: function lanes() {
+           return osmLanes(this);
+         },
+         isClosed: function isClosed() {
+           return this.nodes.length > 1 && this.first() === this.last();
+         },
+         isConvex: function isConvex(resolver) {
+           if (!this.isClosed() || this.isDegenerate()) return null;
+           var nodes = utilArrayUniq(resolver.childNodes(this));
+           var coords = nodes.map(function (n) {
+             return n.loc;
+           });
+           var curr = 0;
+           var prev = 0;
 
-         keybinding.clear = function () {
-           _keybindings = {};
-           return keybinding;
-         }; // Remove one or more keycode bindings.
+           for (var i = 0; i < coords.length; i++) {
+             var o = coords[(i + 1) % coords.length];
+             var a = coords[i];
+             var b = coords[(i + 2) % coords.length];
+             var res = geoVecCross(a, b, o);
+             curr = res > 0 ? 1 : res < 0 ? -1 : 0;
 
+             if (curr === 0) {
+               continue;
+             } else if (prev && curr !== prev) {
+               return false;
+             }
 
-         keybinding.off = function (codes, capture) {
-           var arr = utilArrayUniq([].concat(codes));
+             prev = curr;
+           }
 
-           for (var i = 0; i < arr.length; i++) {
-             var id = arr[i] + (capture ? '-capture' : '-bubble');
-             delete _keybindings[id];
+           return true;
+         },
+         // returns an object with the tag that implies this is an area, if any
+         tagSuggestingArea: function tagSuggestingArea() {
+           return osmTagSuggestingArea(this.tags);
+         },
+         isArea: function isArea() {
+           if (this.tags.area === 'yes') return true;
+           if (!this.isClosed() || this.tags.area === 'no') return false;
+           return this.tagSuggestingArea() !== null;
+         },
+         isDegenerate: function isDegenerate() {
+           return new Set(this.nodes).size < (this.isArea() ? 3 : 2);
+         },
+         areAdjacent: function areAdjacent(n1, n2) {
+           for (var i = 0; i < this.nodes.length; i++) {
+             if (this.nodes[i] === n1) {
+               if (this.nodes[i - 1] === n2) return true;
+               if (this.nodes[i + 1] === n2) return true;
+             }
            }
 
-           return keybinding;
-         }; // Add one or more keycode bindings.
+           return false;
+         },
+         geometry: function geometry(graph) {
+           return graph["transient"](this, 'geometry', function () {
+             return this.isArea() ? 'area' : 'line';
+           });
+         },
+         // returns an array of objects representing the segments between the nodes in this way
+         segments: function segments(graph) {
+           function segmentExtent(graph) {
+             var n1 = graph.hasEntity(this.nodes[0]);
+             var n2 = graph.hasEntity(this.nodes[1]);
+             return n1 && n2 && geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]);
+           }
 
+           return graph["transient"](this, 'segments', function () {
+             var segments = [];
 
-         keybinding.on = function (codes, callback, capture) {
-           if (typeof callback !== 'function') {
-             return keybinding.off(codes, capture);
+             for (var i = 0; i < this.nodes.length - 1; i++) {
+               segments.push({
+                 id: this.id + '-' + i,
+                 wayId: this.id,
+                 index: i,
+                 nodes: [this.nodes[i], this.nodes[i + 1]],
+                 extent: segmentExtent
+               });
+             }
+
+             return segments;
+           });
+         },
+         // If this way is not closed, append the beginning node to the end of the nodelist to close it.
+         close: function close() {
+           if (this.isClosed() || !this.nodes.length) return this;
+           var nodes = this.nodes.slice();
+           nodes = nodes.filter(noRepeatNodes);
+           nodes.push(nodes[0]);
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
+         unclose: function unclose() {
+           if (!this.isClosed()) return this;
+           var nodes = this.nodes.slice();
+           var connector = this.first();
+           var i = nodes.length - 1; // remove trailing connectors..
+
+           while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+             nodes.splice(i, 1);
+             i = nodes.length - 1;
            }
 
-           var arr = utilArrayUniq([].concat(codes));
+           nodes = nodes.filter(noRepeatNodes);
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // Adds a node (id) in front of the node which is currently at position index.
+         // If index is undefined, the node will be added to the end of the way for linear ways,
+         //   or just before the final connecting node for circular ways.
+         // Consecutive duplicates are eliminated including existing ones.
+         // Circularity is always preserved when adding a node.
+         addNode: function addNode(id, index) {
+           var nodes = this.nodes.slice();
+           var isClosed = this.isClosed();
+           var max = isClosed ? nodes.length - 1 : nodes.length;
 
-           for (var i = 0; i < arr.length; i++) {
-             var id = arr[i] + (capture ? '-capture' : '-bubble');
-             var binding = {
-               id: id,
-               capture: capture,
-               callback: callback,
-               event: {
-                 key: undefined,
-                 // preferred
-                 keyCode: 0,
-                 // fallback
-                 modifiers: {
-                   shiftKey: false,
-                   ctrlKey: false,
-                   altKey: false,
-                   metaKey: false
-                 }
-               }
-             };
+           if (index === undefined) {
+             index = max;
+           }
+
+           if (index < 0 || index > max) {
+             throw new RangeError('index ' + index + ' out of range 0..' + max);
+           } // If this is a closed way, remove all connector nodes except the first one
+           // (there may be duplicates) and adjust index if necessary..
 
-             if (_keybindings[id]) {
-               console.warn('warning: duplicate keybinding for "' + id + '"'); // eslint-disable-line no-console
-             }
 
-             _keybindings[id] = binding;
-             var matches = arr[i].toLowerCase().match(/(?:(?:[^+⇧⌃⌥⌘])+|[⇧⌃⌥⌘]|\+\+|^\+$)/g);
+           if (isClosed) {
+             var connector = this.first(); // leading connectors..
 
-             for (var j = 0; j < matches.length; j++) {
-               // Normalise matching errors
-               if (matches[j] === '++') matches[j] = '+';
+             var i = 1;
 
-               if (matches[j] in utilKeybinding.modifierCodes) {
-                 var prop = utilKeybinding.modifierProperties[utilKeybinding.modifierCodes[matches[j]]];
-                 binding.event.modifiers[prop] = true;
-               } else {
-                 binding.event.key = utilKeybinding.keys[matches[j]] || matches[j];
+             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+             } // trailing connectors..
 
-                 if (matches[j] in utilKeybinding.keyCodes) {
-                   binding.event.keyCode = utilKeybinding.keyCodes[matches[j]];
-                 }
-               }
+
+             i = nodes.length - 1;
+
+             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+               i = nodes.length - 1;
              }
            }
 
-           return keybinding;
-         };
-
-         return keybinding;
-       }
-       /*
-        * See https://github.com/keithamus/jwerty
-        */
+           nodes.splice(index, 0, id);
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-       utilKeybinding.modifierCodes = {
-         // Shift key, ⇧
-         '⇧': 16,
-         shift: 16,
-         // CTRL key, on Mac: ⌃
-         '⌃': 17,
-         ctrl: 17,
-         // ALT key, on Mac: ⌥ (Alt)
-         '⌥': 18,
-         alt: 18,
-         option: 18,
-         // META, on Mac: ⌘ (CMD), on Windows (Win), on Linux (Super)
-         '⌘': 91,
-         meta: 91,
-         cmd: 91,
-         'super': 91,
-         win: 91
-       };
-       utilKeybinding.modifierProperties = {
-         16: 'shiftKey',
-         17: 'ctrlKey',
-         18: 'altKey',
-         91: 'metaKey'
-       };
-       utilKeybinding.plusKeys = ['plus', 'ffplus', '=', 'ffequals', '≠', '±'];
-       utilKeybinding.minusKeys = ['_', '-', 'ffminus', 'dash', '–', '—'];
-       utilKeybinding.keys = {
-         // Backspace key, on Mac: ⌫ (Backspace)
-         '⌫': 'Backspace',
-         backspace: 'Backspace',
-         // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-         '⇥': 'Tab',
-         '⇆': 'Tab',
-         tab: 'Tab',
-         // Return key, ↩
-         '↩': 'Enter',
-         '↵': 'Enter',
-         '⏎': 'Enter',
-         'return': 'Enter',
-         enter: 'Enter',
-         '⌅': 'Enter',
-         // Pause/Break key
-         'pause': 'Pause',
-         'pause-break': 'Pause',
-         // Caps Lock key, ⇪
-         '⇪': 'CapsLock',
-         caps: 'CapsLock',
-         'caps-lock': 'CapsLock',
-         // Escape key, on Mac: ⎋, on Windows: Esc
-         '⎋': ['Escape', 'Esc'],
-         escape: ['Escape', 'Esc'],
-         esc: ['Escape', 'Esc'],
-         // Space key
-         space: [' ', 'Spacebar'],
-         // Page-Up key, or pgup, on Mac: ↖
-         '↖': 'PageUp',
-         pgup: 'PageUp',
-         'page-up': 'PageUp',
-         // Page-Down key, or pgdown, on Mac: ↘
-         '↘': 'PageDown',
-         pgdown: 'PageDown',
-         'page-down': 'PageDown',
-         // END key, on Mac: ⇟
-         '⇟': 'End',
-         end: 'End',
-         // HOME key, on Mac: ⇞
-         '⇞': 'Home',
-         home: 'Home',
-         // Insert key, or ins
-         ins: 'Insert',
-         insert: 'Insert',
-         // Delete key, on Mac: ⌦ (Delete)
-         '⌦': ['Delete', 'Del'],
-         del: ['Delete', 'Del'],
-         'delete': ['Delete', 'Del'],
-         // Left Arrow Key, or ←
-         '←': ['ArrowLeft', 'Left'],
-         left: ['ArrowLeft', 'Left'],
-         'arrow-left': ['ArrowLeft', 'Left'],
-         // Up Arrow Key, or ↑
-         '↑': ['ArrowUp', 'Up'],
-         up: ['ArrowUp', 'Up'],
-         'arrow-up': ['ArrowUp', 'Up'],
-         // Right Arrow Key, or →
-         '→': ['ArrowRight', 'Right'],
-         right: ['ArrowRight', 'Right'],
-         'arrow-right': ['ArrowRight', 'Right'],
-         // Up Arrow Key, or ↓
-         '↓': ['ArrowDown', 'Down'],
-         down: ['ArrowDown', 'Down'],
-         'arrow-down': ['ArrowDown', 'Down'],
-         // odities, stuff for backward compatibility (browsers and code):
-         // Num-Multiply, or *
-         '*': ['*', 'Multiply'],
-         star: ['*', 'Multiply'],
-         asterisk: ['*', 'Multiply'],
-         multiply: ['*', 'Multiply'],
-         // Num-Plus or +
-         '+': ['+', 'Add'],
-         'plus': ['+', 'Add'],
-         // Num-Subtract, or -
-         '-': ['-', 'Subtract'],
-         subtract: ['-', 'Subtract'],
-         'dash': ['-', 'Subtract'],
-         // Semicolon
-         semicolon: ';',
-         // = or equals
-         equals: '=',
-         // Comma, or ,
-         comma: ',',
-         // Period, or ., or full-stop
-         period: '.',
-         'full-stop': '.',
-         // Slash, or /, or forward-slash
-         slash: '/',
-         'forward-slash': '/',
-         // Tick, or `, or back-quote
-         tick: '`',
-         'back-quote': '`',
-         // Open bracket, or [
-         'open-bracket': '[',
-         // Back slash, or \
-         'back-slash': '\\',
-         // Close backet, or ]
-         'close-bracket': ']',
-         // Apostrophe, or Quote, or '
-         quote: '\'',
-         apostrophe: '\'',
-         // NUMPAD 0-9
-         'num-0': '0',
-         'num-1': '1',
-         'num-2': '2',
-         'num-3': '3',
-         'num-4': '4',
-         'num-5': '5',
-         'num-6': '6',
-         'num-7': '7',
-         'num-8': '8',
-         'num-9': '9',
-         // F1-F25
-         f1: 'F1',
-         f2: 'F2',
-         f3: 'F3',
-         f4: 'F4',
-         f5: 'F5',
-         f6: 'F6',
-         f7: 'F7',
-         f8: 'F8',
-         f9: 'F9',
-         f10: 'F10',
-         f11: 'F11',
-         f12: 'F12',
-         f13: 'F13',
-         f14: 'F14',
-         f15: 'F15',
-         f16: 'F16',
-         f17: 'F17',
-         f18: 'F18',
-         f19: 'F19',
-         f20: 'F20',
-         f21: 'F21',
-         f22: 'F22',
-         f23: 'F23',
-         f24: 'F24',
-         f25: 'F25'
-       };
-       utilKeybinding.keyCodes = {
-         // Backspace key, on Mac: ⌫ (Backspace)
-         '⌫': 8,
-         backspace: 8,
-         // Tab Key, on Mac: ⇥ (Tab), on Windows ⇥⇥
-         '⇥': 9,
-         '⇆': 9,
-         tab: 9,
-         // Return key, ↩
-         '↩': 13,
-         '↵': 13,
-         '⏎': 13,
-         'return': 13,
-         enter: 13,
-         '⌅': 13,
-         // Pause/Break key
-         'pause': 19,
-         'pause-break': 19,
-         // Caps Lock key, ⇪
-         '⇪': 20,
-         caps: 20,
-         'caps-lock': 20,
-         // Escape key, on Mac: ⎋, on Windows: Esc
-         '⎋': 27,
-         escape: 27,
-         esc: 27,
-         // Space key
-         space: 32,
-         // Page-Up key, or pgup, on Mac: ↖
-         '↖': 33,
-         pgup: 33,
-         'page-up': 33,
-         // Page-Down key, or pgdown, on Mac: ↘
-         '↘': 34,
-         pgdown: 34,
-         'page-down': 34,
-         // END key, on Mac: ⇟
-         '⇟': 35,
-         end: 35,
-         // HOME key, on Mac: ⇞
-         '⇞': 36,
-         home: 36,
-         // Insert key, or ins
-         ins: 45,
-         insert: 45,
-         // Delete key, on Mac: ⌦ (Delete)
-         '⌦': 46,
-         del: 46,
-         'delete': 46,
-         // Left Arrow Key, or ←
-         '←': 37,
-         left: 37,
-         'arrow-left': 37,
-         // Up Arrow Key, or ↑
-         '↑': 38,
-         up: 38,
-         'arrow-up': 38,
-         // Right Arrow Key, or →
-         '→': 39,
-         right: 39,
-         'arrow-right': 39,
-         // Up Arrow Key, or ↓
-         '↓': 40,
-         down: 40,
-         'arrow-down': 40,
-         // odities, printing characters that come out wrong:
-         // Firefox Equals
-         'ffequals': 61,
-         // Num-Multiply, or *
-         '*': 106,
-         star: 106,
-         asterisk: 106,
-         multiply: 106,
-         // Num-Plus or +
-         '+': 107,
-         'plus': 107,
-         // Num-Subtract, or -
-         '-': 109,
-         subtract: 109,
-         // Firefox Plus
-         'ffplus': 171,
-         // Firefox Minus
-         'ffminus': 173,
-         // Semicolon
-         ';': 186,
-         semicolon: 186,
-         // = or equals
-         '=': 187,
-         'equals': 187,
-         // Comma, or ,
-         ',': 188,
-         comma: 188,
-         // Dash / Underscore key
-         'dash': 189,
-         // Period, or ., or full-stop
-         '.': 190,
-         period: 190,
-         'full-stop': 190,
-         // Slash, or /, or forward-slash
-         '/': 191,
-         slash: 191,
-         'forward-slash': 191,
-         // Tick, or `, or back-quote
-         '`': 192,
-         tick: 192,
-         'back-quote': 192,
-         // Open bracket, or [
-         '[': 219,
-         'open-bracket': 219,
-         // Back slash, or \
-         '\\': 220,
-         'back-slash': 220,
-         // Close backet, or ]
-         ']': 221,
-         'close-bracket': 221,
-         // Apostrophe, or Quote, or '
-         '\'': 222,
-         quote: 222,
-         apostrophe: 222
-       }; // NUMPAD 0-9
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }
 
-       var i$1 = 95,
-           n = 0;
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // Replaces the node which is currently at position index with the given node (id).
+         // Consecutive duplicates are eliminated including existing ones.
+         // Circularity is preserved when updating a node.
+         updateNode: function updateNode(id, index) {
+           var nodes = this.nodes.slice();
+           var isClosed = this.isClosed();
+           var max = nodes.length - 1;
 
-       while (++i$1 < 106) {
-         utilKeybinding.keyCodes['num-' + n] = i$1;
-         ++n;
-       } // 0-9
+           if (index === undefined || index < 0 || index > max) {
+             throw new RangeError('index ' + index + ' out of range 0..' + max);
+           } // If this is a closed way, remove all connector nodes except the first one
+           // (there may be duplicates) and adjust index if necessary..
 
 
-       i$1 = 47;
-       n = 0;
+           if (isClosed) {
+             var connector = this.first(); // leading connectors..
 
-       while (++i$1 < 58) {
-         utilKeybinding.keyCodes[n] = i$1;
-         ++n;
-       } // F1-F25
+             var i = 1;
 
+             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index > i) index--;
+             } // trailing connectors..
 
-       i$1 = 111;
-       n = 1;
 
-       while (++i$1 < 136) {
-         utilKeybinding.keyCodes['f' + n] = i$1;
-         ++n;
-       } // a-z
+             i = nodes.length - 1;
 
+             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
+               nodes.splice(i, 1);
+               if (index === i) index = 0; // update leading connector instead
 
-       i$1 = 64;
+               i = nodes.length - 1;
+             }
+           }
 
-       while (++i$1 < 91) {
-         utilKeybinding.keyCodes[String.fromCharCode(i$1).toLowerCase()] = i$1;
-       }
+           nodes.splice(index, 1, id);
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-       function utilObjectOmit(obj, omitKeys) {
-         return Object.keys(obj).reduce(function (result, key) {
-           if (omitKeys.indexOf(key) === -1) {
-             result[key] = obj[key]; // keep
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
            }
 
-           return result;
-         }, {});
-       }
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // Replaces each occurrence of node id needle with replacement.
+         // Consecutive duplicates are eliminated including existing ones.
+         // Circularity is preserved.
+         replaceNode: function replaceNode(needleID, replacementID) {
+           var nodes = this.nodes.slice();
+           var isClosed = this.isClosed();
 
-       // Copies a variable number of methods from source to target.
-       function utilRebind(target, source) {
-         var i = 1,
-             n = arguments.length,
-             method;
+           for (var i = 0; i < nodes.length; i++) {
+             if (nodes[i] === needleID) {
+               nodes[i] = replacementID;
+             }
+           }
 
-         while (++i < n) {
-           target[method = arguments[i]] = d3_rebind(target, source, source[method]);
-         }
+           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-         return target;
-       } // Method is assumed to be a standard D3 getter-setter:
-       // If passed with no arguments, gets the value.
-       // If passed with arguments, sets the value and returns the target.
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }
 
-       function d3_rebind(target, source, method) {
-         return function () {
-           var value = method.apply(source, arguments);
-           return value === source ? target : value;
-         };
-       }
+           return this.update({
+             nodes: nodes
+           });
+         },
+         // Removes each occurrence of node id.
+         // Consecutive duplicates are eliminated including existing ones.
+         // Circularity is preserved.
+         removeNode: function removeNode(id) {
+           var nodes = this.nodes.slice();
+           var isClosed = this.isClosed();
+           nodes = nodes.filter(function (node) {
+             return node !== id;
+           }).filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
 
-       // A per-domain session mutex backed by a cookie and dead man's
-       // switch. If the session crashes, the mutex will auto-release
-       // after 5 seconds.
-       // This accepts a string and returns an object that complies with utilSessionMutexType
-       function utilSessionMutex(name) {
-         var mutex = {};
-         var intervalID;
+           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
+             nodes.push(nodes[0]);
+           }
 
-         function renew() {
-           var expires = new Date();
-           expires.setSeconds(expires.getSeconds() + 5);
-           document.cookie = name + '=1; expires=' + expires.toUTCString() + '; sameSite=strict';
-         }
+           return this.update({
+             nodes: nodes
+           });
+         },
+         asJXON: function asJXON(changeset_id) {
+           var r = {
+             way: {
+               '@id': this.osmId(),
+               '@version': this.version || 0,
+               nd: this.nodes.map(function (id) {
+                 return {
+                   keyAttributes: {
+                     ref: osmEntity.id.toOSM(id)
+                   }
+                 };
+               }, this),
+               tag: Object.keys(this.tags).map(function (k) {
+                 return {
+                   keyAttributes: {
+                     k: k,
+                     v: this.tags[k]
+                   }
+                 };
+               }, this)
+             }
+           };
 
-         mutex.lock = function () {
-           if (intervalID) return true;
-           var cookie = document.cookie.replace(new RegExp('(?:(?:^|.*;)\\s*' + name + '\\s*\\=\\s*([^;]*).*$)|^.*$'), '$1');
-           if (cookie) return false;
-           renew();
-           intervalID = window.setInterval(renew, 4000);
-           return true;
-         };
+           if (changeset_id) {
+             r.way['@changeset'] = changeset_id;
+           }
 
-         mutex.unlock = function () {
-           if (!intervalID) return;
-           document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:00 GMT; sameSite=strict';
-           clearInterval(intervalID);
-           intervalID = null;
-         };
+           return r;
+         },
+         asGeoJSON: function asGeoJSON(resolver) {
+           return resolver["transient"](this, 'GeoJSON', function () {
+             var coordinates = resolver.childNodes(this).map(function (n) {
+               return n.loc;
+             });
+
+             if (this.isArea() && this.isClosed()) {
+               return {
+                 type: 'Polygon',
+                 coordinates: [coordinates]
+               };
+             } else {
+               return {
+                 type: 'LineString',
+                 coordinates: coordinates
+               };
+             }
+           });
+         },
+         area: function area(resolver) {
+           return resolver["transient"](this, 'area', function () {
+             var nodes = resolver.childNodes(this);
+             var json = {
+               type: 'Polygon',
+               coordinates: [nodes.map(function (n) {
+                 return n.loc;
+               })]
+             };
 
-         mutex.locked = function () {
-           return !!intervalID;
-         };
+             if (!this.isClosed() && nodes.length) {
+               json.coordinates[0].push(nodes[0].loc);
+             }
 
-         return mutex;
-       }
+             var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
+             // that OpenStreetMap polygons are not hemisphere-spanning.
 
-       function utilTiler() {
-         var _size = [256, 256];
-         var _scale = 256;
-         var _tileSize = 256;
-         var _zoomExtent = [0, 20];
-         var _translate = [_size[0] / 2, _size[1] / 2];
-         var _margin = 0;
-         var _skipNullIsland = false;
+             if (area > 2 * Math.PI) {
+               json.coordinates[0] = json.coordinates[0].reverse();
+               area = d3_geoArea(json);
+             }
 
-         function clamp(num, min, max) {
-           return Math.max(min, Math.min(num, max));
+             return isNaN(area) ? 0 : area;
+           });
          }
+       }); // Filter function to eliminate consecutive duplicates.
 
-         function nearNullIsland(tile) {
-           var x = tile[0];
-           var y = tile[1];
-           var z = tile[2];
+       function noRepeatNodes(node, i, arr) {
+         return i === 0 || node !== arr[i - 1];
+       }
 
-           if (z >= 7) {
-             var center = Math.pow(2, z - 1);
-             var width = Math.pow(2, z - 6);
-             var min = center - width / 2;
-             var max = center + width / 2 - 1;
-             return x >= min && x <= max && y >= min && y <= max;
-           }
+       //
+       // 1. Relation tagged with `type=multipolygon` and no interesting tags.
+       // 2. One and only one member with the `outer` role. Must be a way with interesting tags.
+       // 3. No members without a role.
+       //
+       // Old multipolygons are no longer recommended but are still rendered as areas by iD.
 
+       function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
+         if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
            return false;
          }
 
-         function tiler() {
-           var z = geoScaleToZoom(_scale / (2 * Math.PI), _tileSize);
-           var z0 = clamp(Math.round(z), _zoomExtent[0], _zoomExtent[1]);
-           var tileMin = 0;
-           var tileMax = Math.pow(2, z0) - 1;
-           var log2ts = Math.log(_tileSize) * Math.LOG2E;
-           var k = Math.pow(2, z - z0 + log2ts);
-           var origin = [(_translate[0] - _scale / 2) / k, (_translate[1] - _scale / 2) / k];
-           var cols = range(clamp(Math.floor(-origin[0]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[0] / k - origin[0]) + _margin, tileMin, tileMax + 1));
-           var rows = range(clamp(Math.floor(-origin[1]) - _margin, tileMin, tileMax + 1), clamp(Math.ceil(_size[1] / k - origin[1]) + _margin, tileMin, tileMax + 1));
-           var tiles = [];
+         var outerMember;
 
-           for (var i = 0; i < rows.length; i++) {
-             var y = rows[i];
+         for (var memberIndex in entity.members) {
+           var member = entity.members[memberIndex];
 
-             for (var j = 0; j < cols.length; j++) {
-               var x = cols[j];
+           if (!member.role || member.role === 'outer') {
+             if (outerMember) return false;
+             if (member.type !== 'way') return false;
+             if (!graph.hasEntity(member.id)) return false;
+             outerMember = graph.entity(member.id);
 
-               if (i >= _margin && i <= rows.length - _margin && j >= _margin && j <= cols.length - _margin) {
-                 tiles.unshift([x, y, z0]); // tiles in view at beginning
-               } else {
-                 tiles.push([x, y, z0]); // tiles in margin at the end
-               }
+             if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
+               return false;
              }
            }
-
-           tiles.translate = origin;
-           tiles.scale = k;
-           return tiles;
          }
-         /**
-          * getTiles() returns an array of tiles that cover the map view
-          */
-
 
-         tiler.getTiles = function (projection) {
-           var origin = [projection.scale() * Math.PI - projection.translate()[0], projection.scale() * Math.PI - projection.translate()[1]];
-           this.size(projection.clipExtent()[1]).scale(projection.scale() * 2 * Math.PI).translate(projection.translate());
-           var tiles = tiler();
-           var ts = tiles.scale;
-           return tiles.map(function (tile) {
-             if (_skipNullIsland && nearNullIsland(tile)) {
-               return false;
-             }
+         return outerMember;
+       } // For fixing up rendering of multipolygons with tags on the outer member.
+       // https://github.com/openstreetmap/iD/issues/613
 
-             var x = tile[0] * ts - origin[0];
-             var y = tile[1] * ts - origin[1];
-             return {
-               id: tile.toString(),
-               xyz: tile,
-               extent: geoExtent(projection.invert([x, y + ts]), projection.invert([x + ts, y]))
-             };
-           }).filter(Boolean);
-         };
-         /**
-          * getGeoJSON() returns a FeatureCollection for debugging tiles
-          */
+       function osmIsOldMultipolygonOuterMember(entity, graph) {
+         if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) {
+           return false;
+         }
 
+         var parents = graph.parentRelations(entity);
+         if (parents.length !== 1) return false;
+         var parent = parents[0];
 
-         tiler.getGeoJSON = function (projection) {
-           var features = tiler.getTiles(projection).map(function (tile) {
-             return {
-               type: 'Feature',
-               properties: {
-                 id: tile.id,
-                 name: tile.id
-               },
-               geometry: {
-                 type: 'Polygon',
-                 coordinates: [tile.extent.polygon()]
-               }
-             };
-           });
-           return {
-             type: 'FeatureCollection',
-             features: features
-           };
-         };
+         if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
+         }
 
-         tiler.tileSize = function (val) {
-           if (!arguments.length) return _tileSize;
-           _tileSize = val;
-           return tiler;
-         };
+         var members = parent.members,
+             member;
 
-         tiler.zoomExtent = function (val) {
-           if (!arguments.length) return _zoomExtent;
-           _zoomExtent = val;
-           return tiler;
-         };
+         for (var i = 0; i < members.length; i++) {
+           member = members[i];
 
-         tiler.size = function (val) {
-           if (!arguments.length) return _size;
-           _size = val;
-           return tiler;
-         };
+           if (member.id === entity.id && member.role && member.role !== 'outer') {
+             // Not outer member
+             return false;
+           }
 
-         tiler.scale = function (val) {
-           if (!arguments.length) return _scale;
-           _scale = val;
-           return tiler;
-         };
+           if (member.id !== entity.id && (!member.role || member.role === 'outer')) {
+             // Not a simple multipolygon
+             return false;
+           }
+         }
 
-         tiler.translate = function (val) {
-           if (!arguments.length) return _translate;
-           _translate = val;
-           return tiler;
-         }; // number to extend the rows/columns beyond those covering the viewport
+         return parent;
+       }
+       function osmOldMultipolygonOuterMember(entity, graph) {
+         if (entity.type !== 'way') return false;
+         var parents = graph.parentRelations(entity);
+         if (parents.length !== 1) return false;
+         var parent = parents[0];
 
+         if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) {
+           return false;
+         }
 
-         tiler.margin = function (val) {
-           if (!arguments.length) return _margin;
-           _margin = +val;
-           return tiler;
-         };
+         var members = parent.members,
+             member,
+             outerMember;
 
-         tiler.skipNullIsland = function (val) {
-           if (!arguments.length) return _skipNullIsland;
-           _skipNullIsland = val;
-           return tiler;
-         };
+         for (var i = 0; i < members.length; i++) {
+           member = members[i];
 
-         return tiler;
-       }
+           if (!member.role || member.role === 'outer') {
+             if (outerMember) return false; // Not a simple multipolygon
 
-       function utilTriggerEvent(target, type) {
-         target.each(function () {
-           var evt = document.createEvent('HTMLEvents');
-           evt.initEvent(type, true, true);
-           this.dispatchEvent(evt);
-         });
-       }
+             outerMember = member;
+           }
+         }
 
-       var _mainLocalizer = coreLocalizer(); // singleton
+         if (!outerMember) return false;
+         var outerEntity = graph.hasEntity(outerMember.id);
 
+         if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length) {
+           return false;
+         }
 
-       var _t = _mainLocalizer.t;
-       // coreLocalizer manages language and locale parameters including translated strings
+         return outerEntity;
+       } // Join `toJoin` array into sequences of connecting ways.
+       // Segments which share identical start/end nodes will, as much as possible,
+       // be connected with each other.
+       //
+       // The return value is a nested array. Each constituent array contains elements
+       // of `toJoin` which have been determined to connect.
+       //
+       // Each consitituent array also has a `nodes` property whose value is an
+       // ordered array of member nodes, with appropriate order reversal and
+       // start/end coordinate de-duplication.
+       //
+       // Members of `toJoin` must have, at minimum, `type` and `id` properties.
+       // Thus either an array of `osmWay`s or a relation member array may be used.
+       //
+       // If an member is an `osmWay`, its tags and childnodes may be reversed via
+       // `actionReverse` in the output.
+       //
+       // The returned sequences array also has an `actions` array property, containing
+       // any reversal actions that should be applied to the graph, should the calling
+       // code attempt to actually join the given ways.
+       //
+       // Incomplete members (those for which `graph.hasEntity(element.id)` returns
+       // false) and non-way members are ignored.
        //
 
-       function coreLocalizer() {
-         var localizer = {};
-         var _dataLanguages = {}; // `_dataLocales` is an object containing all _supported_ locale codes -> language info.
-         // * `rtl` - right-to-left or left-to-right text direction
-         // * `pct` - the percent of strings translated; 1 = 100%, full coverage
-         //
-         // {
-         // en: { rtl: false, pct: {…} },
-         // de: { rtl: false, pct: {…} },
-         // …
-         // }
+       function osmJoinWays(toJoin, graph) {
+         function resolve(member) {
+           return graph.childNodes(graph.entity(member.id));
+         }
 
-         var _dataLocales = {}; // `localeStrings` is an object containing all _loaded_ locale codes -> string data.
-         // {
-         // en: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-         // de: { icons: {…}, toolbar: {…}, modes: {…}, operations: {…}, … },
-         // …
-         // }
+         function reverse(item) {
+           var action = actionReverse(item.id, {
+             reverseOneway: true
+           });
+           sequences.actions.push(action);
+           return item instanceof osmWay ? action(graph).entity(item.id) : item;
+         } // make a copy containing only the items to join
 
-         var _localeStrings = {}; // the current locale
 
-         var _localeCode = 'en-US'; // `_localeCodes` must contain `_localeCode` first, optionally followed by fallbacks
+         toJoin = toJoin.filter(function (member) {
+           return member.type === 'way' && graph.hasEntity(member.id);
+         }); // Are the things we are joining relation members or `osmWays`?
+         // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
 
-         var _localeCodes = ['en-US', 'en'];
-         var _languageCode = 'en';
-         var _textDirection = 'ltr';
-         var _usesMetric = false;
-         var _languageNames = {};
-         var _scriptNames = {}; // getters for the current locale parameters
+         var i;
+         var joinAsMembers = true;
 
-         localizer.localeCode = function () {
-           return _localeCode;
-         };
+         for (i = 0; i < toJoin.length; i++) {
+           if (toJoin[i] instanceof osmWay) {
+             joinAsMembers = false;
+             break;
+           }
+         }
 
-         localizer.localeCodes = function () {
-           return _localeCodes;
-         };
+         var sequences = [];
+         sequences.actions = [];
 
-         localizer.languageCode = function () {
-           return _languageCode;
-         };
+         while (toJoin.length) {
+           // start a new sequence
+           var item = toJoin.shift();
+           var currWays = [item];
+           var currNodes = resolve(item).slice(); // add to it
 
-         localizer.textDirection = function () {
-           return _textDirection;
-         };
+           while (toJoin.length) {
+             var start = currNodes[0];
+             var end = currNodes[currNodes.length - 1];
+             var fn = null;
+             var nodes = null; // Find the next way/member to join.
 
-         localizer.usesMetric = function () {
-           return _usesMetric;
-         };
+             for (i = 0; i < toJoin.length; i++) {
+               item = toJoin[i];
+               nodes = resolve(item); // (for member ordering only, not way ordering - see #4872)
+               // Strongly prefer to generate a forward path that preserves the order
+               // of the members array. For multipolygons and most relations, member
+               // order does not matter - but for routes, it does. (see #4589)
+               // If we started this sequence backwards (i.e. next member way attaches to
+               // the start node and not the end node), reverse the initial way before continuing.
 
-         localizer.languageNames = function () {
-           return _languageNames;
-         };
+               if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end && (nodes[nodes.length - 1] === start || nodes[0] === start)) {
+                 currWays[0] = reverse(currWays[0]);
+                 currNodes.reverse();
+                 start = currNodes[0];
+                 end = currNodes[currNodes.length - 1];
+               }
 
-         localizer.scriptNames = function () {
-           return _scriptNames;
-         }; // The client app may want to manually set the locale, regardless of the
-         // settings provided by the browser
+               if (nodes[0] === end) {
+                 fn = currNodes.push; // join to end
 
+                 nodes = nodes.slice(1);
+                 break;
+               } else if (nodes[nodes.length - 1] === end) {
+                 fn = currNodes.push; // join to end
 
-         var _preferredLocaleCodes = [];
+                 nodes = nodes.slice(0, -1).reverse();
+                 item = reverse(item);
+                 break;
+               } else if (nodes[nodes.length - 1] === start) {
+                 fn = currNodes.unshift; // join to beginning
 
-         localizer.preferredLocaleCodes = function (codes) {
-           if (!arguments.length) return _preferredLocaleCodes;
+                 nodes = nodes.slice(0, -1);
+                 break;
+               } else if (nodes[0] === start) {
+                 fn = currNodes.unshift; // join to beginning
 
-           if (typeof codes === 'string') {
-             // be generous and accept delimited strings as input
-             _preferredLocaleCodes = codes.split(/,|;| /gi).filter(Boolean);
-           } else {
-             _preferredLocaleCodes = codes;
-           }
+                 nodes = nodes.slice(1).reverse();
+                 item = reverse(item);
+                 break;
+               } else {
+                 fn = nodes = null;
+               }
+             }
 
-           return localizer;
-         };
+             if (!nodes) {
+               // couldn't find a joinable way/member
+               break;
+             }
 
-         var _loadPromise;
+             fn.apply(currWays, [item]);
+             fn.apply(currNodes, nodes);
+             toJoin.splice(i, 1);
+           }
 
-         localizer.ensureLoaded = function () {
-           if (_loadPromise) return _loadPromise;
-           return _loadPromise = Promise.all([// load the list of languages
-           _mainFileFetcher.get('languages'), // load the list of supported locales
-           _mainFileFetcher.get('locales')]).then(function (results) {
-             _dataLanguages = results[0];
-             _dataLocales = results[1];
-           }).then(function () {
-             var requestedLocales = (_preferredLocaleCodes || []). // List of locales preferred by the browser in priority order.
-             concat(utilDetect().browserLocales) // fallback to English since it's the only guaranteed complete language
-             .concat(['en']);
+           currWays.nodes = currNodes;
+           sequences.push(currWays);
+         }
 
-             _localeCodes = localesToUseFrom(requestedLocales); // Run iD in the highest-priority locale; the rest are fallbacks
+         return sequences;
+       }
 
-             _localeCode = _localeCodes[0]; // Will always return the index for `en` if nothing else
+       function actionAddMember(relationId, member, memberIndex, insertPair) {
+         return function action(graph) {
+           var relation = graph.entity(relationId); // There are some special rules for Public Transport v2 routes.
 
-             var fullCoverageIndex = _localeCodes.findIndex(function (locale) {
-               return _dataLocales[locale].pct === 1;
-             }); // We only need to load locales up until we find one with full coverage
+           var isPTv2 = /stop|platform/.test(member.role);
 
+           if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
+             // Try to perform sensible inserts based on how the ways join together
+             graph = addWayMember(relation, graph);
+           } else {
+             // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
+             // Stops and Platforms for PTv2 should be ordered first.
+             // hack: We do not currently have the ability to place them in the exactly correct order.
+             if (isPTv2 && isNaN(memberIndex)) {
+               memberIndex = 0;
+             }
 
-             var loadStringsPromises = _localeCodes.slice(0, fullCoverageIndex + 1).map(function (code) {
-               return localizer.loadLocale(code);
-             });
+             graph = graph.replace(relation.addMember(member, memberIndex));
+           }
 
-             return Promise.all(loadStringsPromises);
-           }).then(function () {
-             updateForCurrentLocale();
-           })["catch"](function (err) {
-             return console.error(err);
-           }); // eslint-disable-line
-         }; // Returns the locales from `requestedLocales` supported by iD that we should use
+           return graph;
+         }; // Add a way member into the relation "wherever it makes sense".
+         // In this situation we were not supplied a memberIndex.
 
+         function addWayMember(relation, graph) {
+           var groups, tempWay, insertPairIsReversed, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
 
-         function localesToUseFrom(requestedLocales) {
-           var supportedLocales = _dataLocales;
-           var toUse = [];
+           var PTv2members = [];
+           var members = [];
 
-           for (var i in requestedLocales) {
-             var locale = requestedLocales[i];
-             if (supportedLocales[locale]) toUse.push(locale);
+           for (i = 0; i < relation.members.length; i++) {
+             var m = relation.members[i];
 
-             if (locale.includes('-')) {
-               // Full locale ('es-ES'), add fallback to the base ('es')
-               var langPart = locale.split('-')[0];
-               if (supportedLocales[langPart]) toUse.push(langPart);
+             if (/stop|platform/.test(m.role)) {
+               PTv2members.push(m);
+             } else {
+               members.push(m);
              }
-           } // remove duplicates
-
-
-           return utilArrayUniq(toUse);
-         }
-
-         function updateForCurrentLocale() {
-           if (!_localeCode) return;
-           _languageCode = _localeCode.split('-')[0];
-           var currentData = _dataLocales[_localeCode] || _dataLocales[_languageCode];
-           var hash = utilStringQs(window.location.hash);
-
-           if (hash.rtl === 'true') {
-             _textDirection = 'rtl';
-           } else if (hash.rtl === 'false') {
-             _textDirection = 'ltr';
-           } else {
-             _textDirection = currentData && currentData.rtl ? 'rtl' : 'ltr';
            }
 
-           var locale = _localeCode;
-           if (locale.toLowerCase() === 'en-us') locale = 'en';
-           _languageNames = _localeStrings[locale].languageNames;
-           _scriptNames = _localeStrings[locale].scriptNames;
-           _usesMetric = _localeCode.slice(-3).toLowerCase() !== '-us';
-         }
-         /* Locales */
-         // Returns a Promise to load the strings for the requested locale
+           relation = relation.update({
+             members: members
+           });
 
+           if (insertPair) {
+             // We're adding a member that must stay paired with an existing member.
+             // (This feature is used by `actionSplit`)
+             //
+             // This is tricky because the members may exist multiple times in the
+             // member list, and with different A-B/B-A ordering and different roles.
+             // (e.g. a bus route that loops out and back - #4589).
+             //
+             // Replace the existing member with a temporary way,
+             // so that `osmJoinWays` can treat the pair like a single way.
+             tempWay = osmWay({
+               id: 'wTemp',
+               nodes: insertPair.nodes
+             });
+             graph = graph.replace(tempWay);
+             var tempMember = {
+               id: tempWay.id,
+               type: 'way',
+               role: member.role
+             };
+             var tempRelation = relation.replaceMember({
+               id: insertPair.originalID
+             }, tempMember, true);
+             groups = utilArrayGroupBy(tempRelation.members, 'type');
+             groups.way = groups.way || []; // Insert pair is reversed if the inserted way comes before the original one.
+             // (Except when they form a loop.)
 
-         localizer.loadLocale = function (requested) {
-           if (!_dataLocales) {
-             return Promise.reject('loadLocale called before init');
+             var originalWay = graph.entity(insertPair.originalID);
+             var insertedWay = graph.entity(insertPair.insertedID);
+             insertPairIsReversed = originalWay.nodes.length > 0 && insertedWay.nodes.length > 0 && insertedWay.nodes[insertedWay.nodes.length - 1] === originalWay.nodes[0] && originalWay.nodes[originalWay.nodes.length - 1] !== insertedWay.nodes[0];
+           } else {
+             // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
+             groups = utilArrayGroupBy(relation.members, 'type');
+             groups.way = groups.way || [];
+             groups.way.push(member);
            }
 
-           var locale = requested; // US English is the default
-
-           if (locale.toLowerCase() === 'en-us') locale = 'en';
-
-           if (!_dataLocales[locale]) {
-             return Promise.reject("Unsupported locale: ".concat(requested));
-           }
+           members = withIndex(groups.way);
+           var joined = osmJoinWays(members, graph); // `joined` might not contain all of the way members,
+           // But will contain only the completed (downloaded) members
 
-           if (_localeStrings[locale]) {
-             // already loaded
-             return Promise.resolve(locale);
-           }
+           for (i = 0; i < joined.length; i++) {
+             var segment = joined[i];
+             var nodes = segment.nodes.slice();
+             var startIndex = segment[0].index; // j = array index in `members` where this segment starts
 
-           var fileMap = _mainFileFetcher.fileMap();
-           var key = "locale_".concat(locale);
-           fileMap[key] = "locales/".concat(locale, ".json");
-           return _mainFileFetcher.get(key).then(function (d) {
-             _localeStrings[locale] = d[locale];
-             return locale;
-           });
-         };
+             for (j = 0; j < members.length; j++) {
+               if (members[j].index === startIndex) {
+                 break;
+               }
+             } // k = each member in segment
 
-         localizer.pluralRule = function (number) {
-           return pluralRule(number, _localeCode);
-         }; // Returns the plural rule for the given `number` with the given `localeCode`.
-         // One of: `zero`, `one`, `two`, `few`, `many`, `other`
 
+             for (k = 0; k < segment.length; k++) {
+               item = segment[k];
+               var way = graph.entity(item.id); // If this is a paired item, generate members in correct order and role
 
-         function pluralRule(number, localeCode) {
-           // modern browsers have this functionality built-in
-           var rules = 'Intl' in window && Intl.PluralRules && new Intl.PluralRules(localeCode);
+               if (tempWay && item.id === tempWay.id) {
+                 var reverse = nodes[0].id !== insertPair.nodes[0] ^ insertPairIsReversed;
 
-           if (rules) {
-             return rules.select(number);
-           } // fallback to basic one/other, as in English
+                 if (reverse) {
+                   item.pair = [{
+                     id: insertPair.insertedID,
+                     type: 'way',
+                     role: item.role
+                   }, {
+                     id: insertPair.originalID,
+                     type: 'way',
+                     role: item.role
+                   }];
+                 } else {
+                   item.pair = [{
+                     id: insertPair.originalID,
+                     type: 'way',
+                     role: item.role
+                   }, {
+                     id: insertPair.insertedID,
+                     type: 'way',
+                     role: item.role
+                   }];
+                 }
+               } // reorder `members` if necessary
 
 
-           if (number === 1) return 'one';
-           return 'other';
-         }
-         /**
-         * Try to find that string in `locale` or the current `_localeCode` matching
-         * the given `stringId`. If no string can be found in the requested locale,
-         * we'll recurse down all the `_localeCodes` until one is found.
-         *
-         * @param  {string}   stringId      string identifier
-         * @param  {object?}  replacements  token replacements and default string
-         * @param  {string?}  locale        locale to use (defaults to currentLocale)
-         * @return {string?}  localized string
-         */
+               if (k > 0) {
+                 if (j + k >= members.length || item.index !== members[j + k].index) {
+                   moveMember(members, item.index, j + k);
+                 }
+               }
 
+               nodes.splice(0, way.nodes.length - 1);
+             }
+           }
 
-         localizer.tInfo = function (stringId, replacements, locale) {
-           locale = locale || _localeCode;
-           var path = stringId.split('.').map(function (s) {
-             return s.replace(/<TX_DOT>/g, '.');
-           }).reverse();
-           var stringsKey = locale; // US English is the default
+           if (tempWay) {
+             graph = graph.remove(tempWay);
+           } // Final pass: skip dead items, split pairs, remove index properties
 
-           if (stringsKey.toLowerCase() === 'en-us') stringsKey = 'en';
-           var result = _localeStrings[stringsKey];
 
-           while (result !== undefined && path.length) {
-             result = result[path.pop()];
-           }
+           var wayMembers = [];
 
-           if (result !== undefined) {
-             if (replacements) {
-               if (_typeof(result) === 'object' && Object.keys(result).length) {
-                 // If plural forms are provided, dig one level deeper based on the
-                 // first numeric token replacement provided.
-                 var number = Object.values(replacements).find(function (value) {
-                   return typeof value === 'number';
-                 });
+           for (i = 0; i < members.length; i++) {
+             item = members[i];
+             if (item.index === -1) continue;
 
-                 if (number !== undefined) {
-                   var rule = pluralRule(number, locale);
+             if (item.pair) {
+               wayMembers.push(item.pair[0]);
+               wayMembers.push(item.pair[1]);
+             } else {
+               wayMembers.push(utilObjectOmit(item, ['index']));
+             }
+           } // Put stops and platforms first, then nodes, ways, relations
+           // This is recommended for Public Transport v2 routes:
+           // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
 
-                   if (result[rule]) {
-                     result = result[rule];
-                   } else {
-                     // We're pretty sure this should be a plural but no string
-                     // could be found for the given rule. Just pick the first
-                     // string and hope it makes sense.
-                     result = Object.values(result)[0];
-                   }
-                 }
-               }
 
-               if (typeof result === 'string') {
-                 for (var key in replacements) {
-                   var value = replacements[key];
+           var newMembers = PTv2members.concat(groups.node || [], wayMembers, groups.relation || []);
+           return graph.replace(relation.update({
+             members: newMembers
+           })); // `moveMember()` changes the `members` array in place by splicing
+           // the item with `.index = findIndex` to where it belongs,
+           // and marking the old position as "dead" with `.index = -1`
+           //
+           // j=5, k=0                jk
+           // segment                 5 4 7 6
+           // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
+           //
+           // j=5, k=1                j k
+           // segment                 5 4 7 6
+           // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
+           // members       0 1 2 3 x 5 4 6 7 8 9      moved
+           //
+           // j=5, k=2                j   k
+           // segment                 5 4 7 6
+           // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
+           // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
+           //
+           // j=5, k=3                j     k
+           // segment                 5 4 7 6
+           // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
+           //
 
-                   if (typeof value === 'number' && value.toLocaleString) {
-                     // format numbers for the locale
-                     value = value.toLocaleString(locale, {
-                       style: 'decimal',
-                       useGrouping: true,
-                       minimumFractionDigits: 0
-                     });
-                   }
+           function moveMember(arr, findIndex, toIndex) {
+             var i;
 
-                   var token = "{".concat(key, "}");
-                   var regex = new RegExp(token, 'g');
-                   result = result.replace(regex, value);
-                 }
+             for (i = 0; i < arr.length; i++) {
+               if (arr[i].index === findIndex) {
+                 break;
                }
              }
 
-             if (typeof result === 'string') {
-               // found a localized string!
-               return {
-                 text: result,
-                 locale: locale
-               };
-             }
-           } // no localized string found...
-           // attempt to fallback to a lower-priority language
-
+             var item = Object.assign({}, arr[i]); // shallow copy
 
-           var index = _localeCodes.indexOf(locale);
+             arr[i].index = -1; // mark as dead
 
-           if (index >= 0 && index < _localeCodes.length - 1) {
-             // eventually this will be 'en' or another locale with 100% coverage
-             var fallback = _localeCodes[index + 1];
-             return localizer.tInfo(stringId, replacements, fallback);
-           }
+             item.index = toIndex;
+             arr.splice(toIndex, 0, item);
+           } // This is the same as `Relation.indexedMembers`,
+           // Except we don't want to index all the members, only the ways
 
-           if (replacements && 'default' in replacements) {
-             // Fallback to a default value if one is specified in `replacements`
-             return {
-               text: replacements["default"],
-               locale: null
-             };
-           }
 
-           var missing = "Missing ".concat(locale, " translation: ").concat(stringId);
-           if (typeof console !== 'undefined') console.error(missing); // eslint-disable-line
+           function withIndex(arr) {
+             var result = new Array(arr.length);
 
-           return {
-             text: missing,
-             locale: 'en'
-           };
-         }; // Returns only the localized text, discarding the locale info
+             for (var i = 0; i < arr.length; i++) {
+               result[i] = Object.assign({}, arr[i]); // shallow copy
 
+               result[i].index = i;
+             }
 
-         localizer.t = function (stringId, replacements, locale) {
-           return localizer.tInfo(stringId, replacements, locale).text;
-         }; // Returns the localized text wrapped in an HTML element encoding the locale info
+             return result;
+           }
+         }
+       }
 
+       function actionAddMidpoint(midpoint, node) {
+         return function (graph) {
+           graph = graph.replace(node.move(midpoint.loc));
+           var parents = utilArrayIntersection(graph.parentWays(graph.entity(midpoint.edge[0])), graph.parentWays(graph.entity(midpoint.edge[1])));
+           parents.forEach(function (way) {
+             for (var i = 0; i < way.nodes.length - 1; i++) {
+               if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
+                 graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1)); // Add only one midpoint on doubled-back segments,
+                 // turning them into self-intersections.
 
-         localizer.t.html = function (stringId, replacements, locale) {
-           var info = localizer.tInfo(stringId, replacements, locale); // text may be empty or undefined if `replacements.default` is
+                 return;
+               }
+             }
+           });
+           return graph;
+         };
+       }
 
-           return info.text ? localizer.htmlForLocalizedText(info.text, info.locale) : '';
+       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
+       function actionAddVertex(wayId, nodeId, index) {
+         return function (graph) {
+           return graph.replace(graph.entity(wayId).addNode(nodeId, index));
          };
+       }
 
-         localizer.htmlForLocalizedText = function (text, localeCode) {
-           return "<span class=\"localized-text\" lang=\"".concat(localeCode || 'unknown', "\">").concat(text, "</span>");
+       function actionChangeMember(relationId, member, memberIndex) {
+         return function (graph) {
+           return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
          };
+       }
 
-         localizer.languageName = function (code, options) {
-           if (_languageNames[code]) {
-             // name in locale language
-             // e.g. "German"
-             return _languageNames[code];
-           } // sometimes we only want the local name
+       function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
+         return function action(graph) {
+           var entity = graph.entity(entityID);
+           var geometry = entity.geometry(graph);
+           var tags = entity.tags; // preserve tags that the new preset might care about, if any
 
+           if (oldPreset) tags = oldPreset.unsetTags(tags, geometry, newPreset && newPreset.addTags ? Object.keys(newPreset.addTags) : null);
+           if (newPreset) tags = newPreset.setTags(tags, geometry, skipFieldDefaults);
+           return graph.replace(entity.update({
+             tags: tags
+           }));
+         };
+       }
 
-           if (options && options.localOnly) return null;
-           var langInfo = _dataLanguages[code];
+       function actionChangeTags(entityId, tags) {
+         return function (graph) {
+           var entity = graph.entity(entityId);
+           return graph.replace(entity.update({
+             tags: tags
+           }));
+         };
+       }
 
-           if (langInfo) {
-             if (langInfo.nativeName) {
-               // name in native language
-               // e.g. "Deutsch (de)"
-               return localizer.t('translate.language_and_code', {
-                 language: langInfo.nativeName,
-                 code: code
-               });
-             } else if (langInfo.base && langInfo.script) {
-               var base = langInfo.base; // the code of the language this is based on
+       function osmNode() {
+         if (!(this instanceof osmNode)) {
+           return new osmNode().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }
+       }
+       osmEntity.node = osmNode;
+       osmNode.prototype = Object.create(osmEntity.prototype);
+       Object.assign(osmNode.prototype, {
+         type: 'node',
+         loc: [9999, 9999],
+         extent: function extent() {
+           return new geoExtent(this.loc);
+         },
+         geometry: function geometry(graph) {
+           return graph["transient"](this, 'geometry', function () {
+             return graph.isPoi(this) ? 'point' : 'vertex';
+           });
+         },
+         move: function move(loc) {
+           return this.update({
+             loc: loc
+           });
+         },
+         isDegenerate: function isDegenerate() {
+           return !(Array.isArray(this.loc) && this.loc.length === 2 && this.loc[0] >= -180 && this.loc[0] <= 180 && this.loc[1] >= -90 && this.loc[1] <= 90);
+         },
+         // Inspect tags and geometry to determine which direction(s) this node/vertex points
+         directions: function directions(resolver, projection) {
+           var val;
+           var i; // which tag to use?
 
-               if (_languageNames[base]) {
-                 // base language name in locale language
-                 var scriptCode = langInfo.script;
-                 var script = _scriptNames[scriptCode] || scriptCode; // e.g. "Serbian (Cyrillic)"
+           if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
+             // all-way stop tag on a highway intersection
+             val = 'all';
+           } else {
+             // generic direction tag
+             val = (this.tags.direction || '').toLowerCase(); // better suffix-style direction tag
 
-                 return localizer.t('translate.language_and_code', {
-                   language: _languageNames[base],
-                   code: script
-                 });
-               } else if (_dataLanguages[base] && _dataLanguages[base].nativeName) {
-                 // e.g. "српски (sr-Cyrl)"
-                 return localizer.t('translate.language_and_code', {
-                   language: _dataLanguages[base].nativeName,
-                   code: code
-                 });
+             var re = /:direction$/i;
+             var keys = Object.keys(this.tags);
+
+             for (i = 0; i < keys.length; i++) {
+               if (re.test(keys[i])) {
+                 val = this.tags[keys[i]].toLowerCase();
+                 break;
                }
              }
            }
 
-           return code; // if not found, use the code
-         };
+           if (val === '') return [];
+           var cardinal = {
+             north: 0,
+             n: 0,
+             northnortheast: 22,
+             nne: 22,
+             northeast: 45,
+             ne: 45,
+             eastnortheast: 67,
+             ene: 67,
+             east: 90,
+             e: 90,
+             eastsoutheast: 112,
+             ese: 112,
+             southeast: 135,
+             se: 135,
+             southsoutheast: 157,
+             sse: 157,
+             south: 180,
+             s: 180,
+             southsouthwest: 202,
+             ssw: 202,
+             southwest: 225,
+             sw: 225,
+             westsouthwest: 247,
+             wsw: 247,
+             west: 270,
+             w: 270,
+             westnorthwest: 292,
+             wnw: 292,
+             northwest: 315,
+             nw: 315,
+             northnorthwest: 337,
+             nnw: 337
+           };
+           var values = val.split(';');
+           var results = [];
+           values.forEach(function (v) {
+             // swap cardinal for numeric directions
+             if (cardinal[v] !== undefined) {
+               v = cardinal[v];
+             } // numeric direction - just add to results
 
-         return localizer;
-       }
 
-       // `presetCollection` is a wrapper around an `Array` of presets `collection`,
-       // and decorated with some extra methods for searching and matching geometry
-       //
+             if (v !== '' && !isNaN(+v)) {
+               results.push(+v);
+               return;
+             } // string direction - inspect parent ways
 
-       function presetCollection(collection) {
-         var MAXRESULTS = 50;
-         var _this = {};
-         var _memo = {};
-         _this.collection = collection;
 
-         _this.item = function (id) {
-           if (_memo[id]) return _memo[id];
+             var lookBackward = this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all';
+             var lookForward = this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all';
+             if (!lookForward && !lookBackward) return;
+             var nodeIds = {};
+             resolver.parentWays(this).forEach(function (parent) {
+               var nodes = parent.nodes;
 
-           var found = _this.collection.find(function (d) {
-             return d.id === id;
+               for (i = 0; i < nodes.length; i++) {
+                 if (nodes[i] === this.id) {
+                   // match current entity
+                   if (lookForward && i > 0) {
+                     nodeIds[nodes[i - 1]] = true; // look back to prev node
+                   }
+
+                   if (lookBackward && i < nodes.length - 1) {
+                     nodeIds[nodes[i + 1]] = true; // look ahead to next node
+                   }
+                 }
+               }
+             }, this);
+             Object.keys(nodeIds).forEach(function (nodeId) {
+               // +90 because geoAngle returns angle from X axis, not Y (north)
+               results.push(geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI) + 90);
+             }, this);
+           }, this);
+           return utilArrayUniq(results);
+         },
+         isCrossing: function isCrossing() {
+           return this.tags.highway === 'crossing' || this.tags.railway && this.tags.railway.indexOf('crossing') !== -1;
+         },
+         isEndpoint: function isEndpoint(resolver) {
+           return resolver["transient"](this, 'isEndpoint', function () {
+             var id = this.id;
+             return resolver.parentWays(this).filter(function (parent) {
+               return !parent.isClosed() && !!parent.affix(id);
+             }).length > 0;
            });
+         },
+         isConnected: function isConnected(resolver) {
+           return resolver["transient"](this, 'isConnected', function () {
+             var parents = resolver.parentWays(this);
 
-           if (found) _memo[id] = found;
-           return found;
-         };
+             if (parents.length > 1) {
+               // vertex is connected to multiple parent ways
+               for (var i in parents) {
+                 if (parents[i].geometry(resolver) === 'line' && parents[i].hasInterestingTags()) return true;
+               }
+             } else if (parents.length === 1) {
+               var way = parents[0];
+               var nodes = way.nodes.slice();
 
-         _this.index = function (id) {
-           return _this.collection.findIndex(function (d) {
-             return d.id === id;
-           });
-         };
+               if (way.isClosed()) {
+                 nodes.pop();
+               } // ignore connecting node if closed
+               // return true if vertex appears multiple times (way is self intersecting)
 
-         _this.matchGeometry = function (geometry) {
-           return presetCollection(_this.collection.filter(function (d) {
-             return d.matchGeometry(geometry);
-           }));
-         };
 
-         _this.matchAllGeometry = function (geometries) {
-           return presetCollection(_this.collection.filter(function (d) {
-             return d && d.matchAllGeometry(geometries);
-           }));
-         };
+               return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
+             }
 
-         _this.matchAnyGeometry = function (geometries) {
-           return presetCollection(_this.collection.filter(function (d) {
-             return geometries.some(function (geom) {
-               return d.matchGeometry(geom);
+             return false;
+           });
+         },
+         parentIntersectionWays: function parentIntersectionWays(resolver) {
+           return resolver["transient"](this, 'parentIntersectionWays', function () {
+             return resolver.parentWays(this).filter(function (parent) {
+               return (parent.tags.highway || parent.tags.waterway || parent.tags.railway || parent.tags.aeroway) && parent.geometry(resolver) === 'line';
              });
-           }));
-         };
-
-         _this.fallback = function (geometry) {
-           var id = geometry;
-           if (id === 'vertex') id = 'point';
-           return _this.item(id);
-         };
+           });
+         },
+         isIntersection: function isIntersection(resolver) {
+           return this.parentIntersectionWays(resolver).length > 1;
+         },
+         isHighwayIntersection: function isHighwayIntersection(resolver) {
+           return resolver["transient"](this, 'isHighwayIntersection', function () {
+             return resolver.parentWays(this).filter(function (parent) {
+               return parent.tags.highway && parent.geometry(resolver) === 'line';
+             }).length > 1;
+           });
+         },
+         isOnAddressLine: function isOnAddressLine(resolver) {
+           return resolver["transient"](this, 'isOnAddressLine', function () {
+             return resolver.parentWays(this).filter(function (parent) {
+               return parent.tags.hasOwnProperty('addr:interpolation') && parent.geometry(resolver) === 'line';
+             }).length > 0;
+           });
+         },
+         asJXON: function asJXON(changeset_id) {
+           var r = {
+             node: {
+               '@id': this.osmId(),
+               '@lon': this.loc[0],
+               '@lat': this.loc[1],
+               '@version': this.version || 0,
+               tag: Object.keys(this.tags).map(function (k) {
+                 return {
+                   keyAttributes: {
+                     k: k,
+                     v: this.tags[k]
+                   }
+                 };
+               }, this)
+             }
+           };
+           if (changeset_id) r.node['@changeset'] = changeset_id;
+           return r;
+         },
+         asGeoJSON: function asGeoJSON() {
+           return {
+             type: 'Point',
+             coordinates: this.loc
+           };
+         }
+       });
 
-         _this.search = function (value, geometry, countryCode) {
-           if (!value) return _this;
-           value = value.toLowerCase().trim(); // match at name beginning or just after a space (e.g. "office" -> match "Law Office")
+       function actionCircularize(wayId, projection, maxAngle) {
+         maxAngle = (maxAngle || 20) * Math.PI / 180;
 
-           function leading(a) {
-             var index = a.indexOf(value);
-             return index === 0 || a[index - 1] === ' ';
-           } // match at name beginning only
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var way = graph.entity(wayId);
+           var origNodes = {};
+           graph.childNodes(way).forEach(function (node) {
+             if (!origNodes[node.id]) origNodes[node.id] = node;
+           });
 
+           if (!way.isConvex(graph)) {
+             graph = action.makeConvex(graph);
+           }
 
-           function leadingStrict(a) {
-             var index = a.indexOf(value);
-             return index === 0;
+           var nodes = utilArrayUniq(graph.childNodes(way));
+           var keyNodes = nodes.filter(function (n) {
+             return graph.parentWays(n).length !== 1;
+           });
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var keyPoints = keyNodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var centroid = points.length === 2 ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
+           var radius = d3_median(points, function (p) {
+             return geoVecLength(centroid, p);
+           });
+           var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+           var ids, i, j, k; // we need at least two key nodes for the algorithm to work
+
+           if (!keyNodes.length) {
+             keyNodes = [nodes[0]];
+             keyPoints = [points[0]];
            }
 
-           function sortNames(a, b) {
-             var aCompare = (a.suggestion ? a.originalName : a.name()).toLowerCase();
-             var bCompare = (b.suggestion ? b.originalName : b.name()).toLowerCase(); // priority if search string matches preset name exactly - #4325
+           if (keyNodes.length === 1) {
+             var index = nodes.indexOf(keyNodes[0]);
+             var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
+             keyNodes.push(nodes[oppositeIndex]);
+             keyPoints.push(points[oppositeIndex]);
+           } // key points and nodes are those connected to the ways,
+           // they are projected onto the circle, in between nodes are moved
+           // to constant intervals between key nodes, extra in between nodes are
+           // added if necessary.
 
-             if (value === aCompare) return -1;
-             if (value === bCompare) return 1; // priority for higher matchScore
 
-             var i = b.originalScore - a.originalScore;
-             if (i !== 0) return i; // priority if search string appears earlier in preset name
+           for (i = 0; i < keyPoints.length; i++) {
+             var nextKeyNodeIndex = (i + 1) % keyNodes.length;
+             var startNode = keyNodes[i];
+             var endNode = keyNodes[nextKeyNodeIndex];
+             var startNodeIndex = nodes.indexOf(startNode);
+             var endNodeIndex = nodes.indexOf(endNode);
+             var numberNewPoints = -1;
+             var indexRange = endNodeIndex - startNodeIndex;
+             var nearNodes = {};
+             var inBetweenNodes = [];
+             var startAngle, endAngle, totalAngle, eachAngle;
+             var angle, loc, node, origNode;
 
-             i = aCompare.indexOf(value) - bCompare.indexOf(value);
-             if (i !== 0) return i; // priority for shorter preset names
+             if (indexRange < 0) {
+               indexRange += nodes.length;
+             } // position this key node
 
-             return aCompare.length - bCompare.length;
-           }
 
-           var pool = _this.collection;
+             var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
+             keyPoints[i] = [centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius, centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius];
+             loc = projection.invert(keyPoints[i]);
+             node = keyNodes[i];
+             origNode = origNodes[node.id];
+             node = node.move(geoVecInterp(origNode.loc, loc, t));
+             graph = graph.replace(node); // figure out the between delta angle we want to match to
 
-           if (countryCode) {
-             pool = pool.filter(function (a) {
-               if (a.countryCodes && a.countryCodes.indexOf(countryCode) === -1) return false;
-               if (a.notCountryCodes && a.notCountryCodes.indexOf(countryCode) !== -1) return false;
-               return true;
-             });
-           }
+             startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
+             endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
+             totalAngle = endAngle - startAngle; // detects looping around -pi/pi
 
-           var searchable = pool.filter(function (a) {
-             return a.searchable !== false && a.suggestion !== true;
-           });
-           var suggestions = pool.filter(function (a) {
-             return a.suggestion === true;
-           }); // matches value to preset.name
+             if (totalAngle * sign > 0) {
+               totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
+             }
 
-           var leading_name = searchable.filter(function (a) {
-             return leading(a.name().toLowerCase());
-           }).sort(sortNames); // matches value to preset suggestion name (original name is unhyphenated)
+             do {
+               numberNewPoints++;
+               eachAngle = totalAngle / (indexRange + numberNewPoints);
+             } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
 
-           var leading_suggestions = suggestions.filter(function (a) {
-             return leadingStrict(a.originalName.toLowerCase());
-           }).sort(sortNames); // matches value to preset.terms values
 
-           var leading_terms = searchable.filter(function (a) {
-             return (a.terms() || []).some(leading);
-           }); // matches value to preset.tags values
+             for (j = 1; j < indexRange; j++) {
+               angle = startAngle + j * eachAngle;
+               loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]);
+               node = nodes[(j + startNodeIndex) % nodes.length];
+               origNode = origNodes[node.id];
+               nearNodes[node.id] = angle;
+               node = node.move(geoVecInterp(origNode.loc, loc, t));
+               graph = graph.replace(node);
+             } // add new in between nodes if necessary
 
-           var leading_tag_values = searchable.filter(function (a) {
-             return Object.values(a.tags || {}).filter(function (val) {
-               return val !== '*';
-             }).some(leading);
-           }); // finds close matches to value in preset.name
 
-           var similar_name = searchable.map(function (a) {
-             return {
-               preset: a,
-               dist: utilEditDistance(value, a.name())
-             };
-           }).filter(function (a) {
-             return a.dist + Math.min(value.length - a.preset.name().length, 0) < 3;
-           }).sort(function (a, b) {
-             return a.dist - b.dist;
-           }).map(function (a) {
-             return a.preset;
-           }); // finds close matches to value to preset suggestion name (original name is unhyphenated)
+             for (j = 0; j < numberNewPoints; j++) {
+               angle = startAngle + (indexRange + j) * eachAngle;
+               loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]); // choose a nearnode to use as the original
 
-           var similar_suggestions = suggestions.map(function (a) {
-             return {
-               preset: a,
-               dist: utilEditDistance(value, a.originalName.toLowerCase())
-             };
-           }).filter(function (a) {
-             return a.dist + Math.min(value.length - a.preset.originalName.length, 0) < 1;
-           }).sort(function (a, b) {
-             return a.dist - b.dist;
-           }).map(function (a) {
-             return a.preset;
-           }); // finds close matches to value in preset.terms
+               var min = Infinity;
 
-           var similar_terms = searchable.filter(function (a) {
-             return (a.terms() || []).some(function (b) {
-               return utilEditDistance(value, b) + Math.min(value.length - b.length, 0) < 3;
-             });
-           });
-           var results = leading_name.concat(leading_suggestions, leading_terms, leading_tag_values, similar_name, similar_suggestions, similar_terms).slice(0, MAXRESULTS - 1);
+               for (var nodeId in nearNodes) {
+                 var nearAngle = nearNodes[nodeId];
+                 var dist = Math.abs(nearAngle - angle);
 
-           if (geometry) {
-             if (typeof geometry === 'string') {
-               results.push(_this.fallback(geometry));
-             } else {
-               geometry.forEach(function (geom) {
-                 return results.push(_this.fallback(geom));
+                 if (dist < min) {
+                   min = dist;
+                   origNode = origNodes[nodeId];
+                 }
+               }
+
+               node = osmNode({
+                 loc: geoVecInterp(origNode.loc, loc, t)
                });
-             }
-           }
+               graph = graph.replace(node);
+               nodes.splice(endNodeIndex + j, 0, node);
+               inBetweenNodes.push(node.id);
+             } // Check for other ways that share these keyNodes..
+             // If keyNodes are adjacent in both ways,
+             // we can add inBetweenNodes to that shared way too..
 
-           return presetCollection(utilArrayUniq(results));
-         };
 
-         return _this;
-       }
+             if (indexRange === 1 && inBetweenNodes.length) {
+               var startIndex1 = way.nodes.lastIndexOf(startNode.id);
+               var endIndex1 = way.nodes.lastIndexOf(endNode.id);
+               var wayDirection1 = endIndex1 - startIndex1;
 
-       // `presetCategory` builds a `presetCollection` of member presets,
-       // decorated with some extra methods for searching and matching geometry
-       //
+               if (wayDirection1 < -1) {
+                 wayDirection1 = 1;
+               }
 
-       function presetCategory(categoryID, category, all) {
-         var _this = Object.assign({}, category); // shallow copy
+               var parentWays = graph.parentWays(keyNodes[i]);
 
+               for (j = 0; j < parentWays.length; j++) {
+                 var sharedWay = parentWays[j];
+                 if (sharedWay === way) continue;
 
-         _this.id = categoryID;
-         _this.members = presetCollection(category.members.map(function (presetID) {
-           return all.item(presetID);
-         }).filter(Boolean));
-         _this.geometry = _this.members.collection.reduce(function (acc, preset) {
-           for (var i in preset.geometry) {
-             var geometry = preset.geometry[i];
+                 if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
+                   var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
+                   var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
+                   var wayDirection2 = endIndex2 - startIndex2;
+                   var insertAt = endIndex2;
 
-             if (acc.indexOf(geometry) === -1) {
-               acc.push(geometry);
-             }
-           }
+                   if (wayDirection2 < -1) {
+                     wayDirection2 = 1;
+                   }
 
-           return acc;
-         }, []);
+                   if (wayDirection1 !== wayDirection2) {
+                     inBetweenNodes.reverse();
+                     insertAt = startIndex2;
+                   }
 
-         _this.matchGeometry = function (geom) {
-           return _this.geometry.indexOf(geom) >= 0;
-         };
+                   for (k = 0; k < inBetweenNodes.length; k++) {
+                     sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
+                   }
 
-         _this.matchAllGeometry = function (geometries) {
-           return _this.members.collection.some(function (preset) {
-             return preset.matchAllGeometry(geometries);
-           });
-         };
+                   graph = graph.replace(sharedWay);
+                 }
+               }
+             }
+           } // update the way to have all the new nodes
 
-         _this.matchScore = function () {
-           return -1;
-         };
 
-         _this.name = function () {
-           return _t("presets.categories.".concat(categoryID, ".name"), {
-             'default': categoryID
+           ids = nodes.map(function (n) {
+             return n.id;
+           });
+           ids.push(ids[0]);
+           way = way.update({
+             nodes: ids
            });
+           graph = graph.replace(way);
+           return graph;
          };
 
-         _this.nameLabel = function () {
-           return _t.html("presets.categories.".concat(categoryID, ".name"), {
-             'default': categoryID
+         action.makeConvex = function (graph) {
+           var way = graph.entity(wayId);
+           var nodes = utilArrayUniq(graph.childNodes(way));
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
            });
-         };
+           var sign = d3_polygonArea(points) > 0 ? 1 : -1;
+           var hull = d3_polygonHull(points);
+           var i, j; // D3 convex hulls go counterclockwise..
 
-         _this.terms = function () {
-           return [];
-         };
+           if (sign === -1) {
+             nodes.reverse();
+             points.reverse();
+           }
 
-         return _this;
-       }
+           for (i = 0; i < hull.length - 1; i++) {
+             var startIndex = points.indexOf(hull[i]);
+             var endIndex = points.indexOf(hull[i + 1]);
+             var indexRange = endIndex - startIndex;
 
-       // `presetField` decorates a given `field` Object
-       // with some extra methods for searching and matching geometry
-       //
+             if (indexRange < 0) {
+               indexRange += nodes.length;
+             } // move interior nodes to the surface of the convex hull..
 
-       function presetField(fieldID, field) {
-         var _this = Object.assign({}, field); // shallow copy
 
+             for (j = 1; j < indexRange; j++) {
+               var point = geoVecInterp(hull[i], hull[i + 1], j / indexRange);
+               var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
+               graph = graph.replace(node);
+             }
+           }
 
-         _this.id = fieldID; // for use in classes, element ids, css selectors
+           return graph;
+         };
 
-         _this.safeid = utilSafeClassName(fieldID);
+         action.disabled = function (graph) {
+           if (!graph.entity(wayId).isClosed()) {
+             return 'not_closed';
+           } //disable when already circular
 
-         _this.matchGeometry = function (geom) {
-           return !_this.geometry || _this.geometry.indexOf(geom) !== -1;
-         };
 
-         _this.matchAllGeometry = function (geometries) {
-           return !_this.geometry || geometries.every(function (geom) {
-             return _this.geometry.indexOf(geom) !== -1;
+           var way = graph.entity(wayId);
+           var nodes = utilArrayUniq(graph.childNodes(way));
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
            });
-         };
+           var hull = d3_polygonHull(points);
+           var epsilonAngle = Math.PI / 180;
 
-         _this.t = function (scope, options) {
-           return _t("presets.fields.".concat(fieldID, ".").concat(scope), options);
-         };
+           if (hull.length !== points.length || hull.length < 3) {
+             return false;
+           }
 
-         _this.t.html = function (scope, options) {
-           return _t.html("presets.fields.".concat(fieldID, ".").concat(scope), options);
-         };
+           var centroid = d3_polygonCentroid(points);
+           var radius = geoVecLengthSquare(centroid, points[0]);
+           var i, actualPoint; // compare distances between centroid and points
 
-         _this.title = function () {
-           return _this.overrideLabel || _this.t('label', {
-             'default': fieldID
-           });
-         };
+           for (i = 0; i < hull.length; i++) {
+             actualPoint = hull[i];
+             var actualDist = geoVecLengthSquare(actualPoint, centroid);
+             var diff = Math.abs(actualDist - radius); //compare distances with epsilon-error (5%)
 
-         _this.label = function () {
-           return _this.overrideLabel || _this.t.html('label', {
-             'default': fieldID
-           });
-         };
+             if (diff > 0.05 * radius) {
+               return false;
+             }
+           } //check if central angles are smaller than maxAngle
 
-         var _placeholder = _this.placeholder;
 
-         _this.placeholder = function () {
-           return _this.t('placeholder', {
-             'default': _placeholder
-           });
-         };
+           for (i = 0; i < hull.length; i++) {
+             actualPoint = hull[i];
+             var nextPoint = hull[(i + 1) % hull.length];
+             var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
+             var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
+             var angle = endAngle - startAngle;
 
-         _this.originalTerms = (_this.terms || []).join();
+             if (angle < 0) {
+               angle = -angle;
+             }
 
-         _this.terms = function () {
-           return _this.t('terms', {
-             'default': _this.originalTerms
-           }).toLowerCase().trim().split(/\s*,+\s*/);
+             if (angle > Math.PI) {
+               angle = 2 * Math.PI - angle;
+             }
+
+             if (angle > maxAngle + epsilonAngle) {
+               return false;
+             }
+           }
+
+           return 'already_circular';
          };
 
-         _this.increment = _this.type === 'number' ? _this.increment || 1 : undefined;
-         return _this;
+         action.transitionable = true;
+         return action;
        }
 
-       // `Array.prototype.lastIndexOf` method
-       // https://tc39.github.io/ecma262/#sec-array.prototype.lastindexof
-       _export({ target: 'Array', proto: true, forced: arrayLastIndexOf !== [].lastIndexOf }, {
-         lastIndexOf: arrayLastIndexOf
-       });
+       function actionDeleteWay(wayID) {
+         function canDeleteNode(node, graph) {
+           // don't delete nodes still attached to ways or relations
+           if (graph.parentWays(node).length || graph.parentRelations(node).length) return false;
+           var geometries = osmNodeGeometriesForTags(node.tags); // don't delete if this node can be a standalone point
 
-       // `presetPreset` decorates a given `preset` Object
-       // with some extra methods for searching and matching geometry
-       //
+           if (geometries.point) return false; // delete if this node only be a vertex
 
-       function presetPreset(presetID, preset, addable, allFields, allPresets) {
-         allFields = allFields || {};
-         allPresets = allPresets || {};
+           if (geometries.vertex) return true; // iD doesn't know if this should be a point or vertex,
+           // so only delete if there are no interesting tags
 
-         var _this = Object.assign({}, preset); // shallow copy
+           return !node.hasInterestingTags();
+         }
 
+         var action = function action(graph) {
+           var way = graph.entity(wayID);
+           graph.parentRelations(way).forEach(function (parent) {
+             parent = parent.removeMembersWithID(wayID);
+             graph = graph.replace(parent);
 
-         var _addable = addable || false;
+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           new Set(way.nodes).forEach(function (nodeID) {
+             graph = graph.replace(way.removeNode(nodeID));
+             var node = graph.entity(nodeID);
 
-         var _resolvedFields; // cache
+             if (canDeleteNode(node, graph)) {
+               graph = graph.remove(node);
+             }
+           });
+           return graph.remove(way);
+         };
 
+         return action;
+       }
 
-         var _resolvedMoreFields; // cache
+       function actionDeleteMultiple(ids) {
+         var actions = {
+           way: actionDeleteWay,
+           node: actionDeleteNode,
+           relation: actionDeleteRelation
+         };
 
+         var action = function action(graph) {
+           ids.forEach(function (id) {
+             if (graph.hasEntity(id)) {
+               // It may have been deleted already.
+               graph = actions[graph.entity(id).type](id)(graph);
+             }
+           });
+           return graph;
+         };
 
-         _this.id = presetID;
-         _this.safeid = utilSafeClassName(presetID); // for use in css classes, selectors, element ids
+         return action;
+       }
 
-         _this.originalTerms = (_this.terms || []).join();
-         _this.originalName = _this.name || '';
-         _this.originalScore = _this.matchScore || 1;
-         _this.originalReference = _this.reference || {};
-         _this.originalFields = _this.fields || [];
-         _this.originalMoreFields = _this.moreFields || [];
+       function actionDeleteRelation(relationID, allowUntaggedMembers) {
+         function canDeleteEntity(entity, graph) {
+           return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
+         }
 
-         _this.fields = function () {
-           return _resolvedFields || (_resolvedFields = resolve('fields'));
-         };
+         var action = function action(graph) {
+           var relation = graph.entity(relationID);
+           graph.parentRelations(relation).forEach(function (parent) {
+             parent = parent.removeMembersWithID(relationID);
+             graph = graph.replace(parent);
 
-         _this.moreFields = function () {
-           return _resolvedMoreFields || (_resolvedMoreFields = resolve('moreFields'));
-         };
+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           var memberIDs = utilArrayUniq(relation.members.map(function (m) {
+             return m.id;
+           }));
+           memberIDs.forEach(function (memberID) {
+             graph = graph.replace(relation.removeMembersWithID(memberID));
+             var entity = graph.entity(memberID);
 
-         _this.resetFields = function () {
-           return _resolvedFields = _resolvedMoreFields = null;
+             if (canDeleteEntity(entity, graph)) {
+               graph = actionDeleteMultiple([memberID])(graph);
+             }
+           });
+           return graph.remove(relation);
          };
 
-         _this.tags = _this.tags || {};
-         _this.addTags = _this.addTags || _this.tags;
-         _this.removeTags = _this.removeTags || _this.addTags;
-         _this.geometry = _this.geometry || [];
+         return action;
+       }
 
-         _this.matchGeometry = function (geom) {
-           return _this.geometry.indexOf(geom) >= 0;
-         };
+       function actionDeleteNode(nodeId) {
+         var action = function action(graph) {
+           var node = graph.entity(nodeId);
+           graph.parentWays(node).forEach(function (parent) {
+             parent = parent.removeNode(nodeId);
+             graph = graph.replace(parent);
 
-         _this.matchAllGeometry = function (geoms) {
-           return geoms.every(_this.matchGeometry);
+             if (parent.isDegenerate()) {
+               graph = actionDeleteWay(parent.id)(graph);
+             }
+           });
+           graph.parentRelations(node).forEach(function (parent) {
+             parent = parent.removeMembersWithID(nodeId);
+             graph = graph.replace(parent);
+
+             if (parent.isDegenerate()) {
+               graph = actionDeleteRelation(parent.id)(graph);
+             }
+           });
+           return graph.remove(node);
          };
 
-         _this.matchScore = function (entityTags) {
-           var tags = _this.tags;
-           var seen = {};
-           var score = 0; // match on tags
+         return action;
+       }
 
-           for (var k in tags) {
-             seen[k] = true;
+       //
+       // First choose a node to be the survivor, with preference given
+       // to the oldest existing (not new) and "interesting" node.
+       //
+       // Tags and relation memberships of of non-surviving nodes are merged
+       // to the survivor.
+       //
+       // This is the inverse of `iD.actionDisconnect`.
+       //
+       // Reference:
+       //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
+       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
+       //
 
-             if (entityTags[k] === tags[k]) {
-               score += _this.originalScore;
-             } else if (tags[k] === '*' && k in entityTags) {
-               score += _this.originalScore / 2;
-             } else {
-               return -1;
-             }
-           } // boost score for additional matches in addTags - #6802
+       function actionConnect(nodeIDs) {
+         var action = function action(graph) {
+           var survivor;
+           var node;
+           var parents;
+           var i, j; // Select the node with the ID passed as parameter if it is in the list,
+           // otherwise select the node with the oldest ID as the survivor, or the
+           // last one if there are only new nodes.
 
+           nodeIDs.reverse();
+           var interestingIDs = [];
 
-           var addTags = _this.addTags;
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
 
-           for (var _k in addTags) {
-             if (!seen[_k] && entityTags[_k] === addTags[_k]) {
-               score += _this.originalScore;
+             if (node.hasInterestingTags()) {
+               if (!node.isNew()) {
+                 interestingIDs.push(node.id);
+               }
              }
            }
 
-           return score;
-         };
-
-         _this.t = function (scope, options) {
-           var textID = "presets.presets.".concat(presetID, ".").concat(scope);
-           return _t(textID, options);
-         };
+           survivor = graph.entity(utilOldestID(interestingIDs.length > 0 ? interestingIDs : nodeIDs)); // Replace all non-surviving nodes with the survivor and merge tags.
 
-         _this.t.html = function (scope, options) {
-           var textID = "presets.presets.".concat(presetID, ".").concat(scope);
-           return _t.html(textID, options);
-         };
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             if (node.id === survivor.id) continue;
+             parents = graph.parentWays(node);
 
-         _this.name = function () {
-           return _this.t('name', {
-             'default': _this.originalName
-           });
-         };
+             for (j = 0; j < parents.length; j++) {
+               graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
+             }
 
-         _this.nameLabel = function () {
-           return _this.t.html('name', {
-             'default': _this.originalName
-           });
-         };
+             parents = graph.parentRelations(node);
 
-         _this.subtitle = function () {
-           if (_this.suggestion) {
-             var path = presetID.split('/');
-             path.pop(); // remove brand name
+             for (j = 0; j < parents.length; j++) {
+               graph = graph.replace(parents[j].replaceMember(node, survivor));
+             }
 
-             return _t('presets.presets.' + path.join('/') + '.name');
+             survivor = survivor.mergeTags(node.tags);
+             graph = actionDeleteNode(node.id)(graph);
            }
 
-           return null;
-         };
+           graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
 
-         _this.subtitleLabel = function () {
-           if (_this.suggestion) {
-             var path = presetID.split('/');
-             path.pop(); // remove brand name
+           parents = graph.parentWays(survivor);
 
-             return _t.html('presets.presets.' + path.join('/') + '.name');
+           for (i = 0; i < parents.length; i++) {
+             if (parents[i].isDegenerate()) {
+               graph = actionDeleteWay(parents[i].id)(graph);
+             }
            }
 
-           return null;
+           return graph;
          };
 
-         _this.terms = function () {
-           return _this.t('terms', {
-             'default': _this.originalTerms
-           }).toLowerCase().trim().split(/\s*,+\s*/);
-         };
+         action.disabled = function (graph) {
+           var seen = {};
+           var restrictionIDs = [];
+           var survivor;
+           var node, way;
+           var relations, relation, role;
+           var i, j, k; // Select the node with the oldest ID as the survivor.
 
-         _this.isFallback = function () {
-           var tagCount = Object.keys(_this.tags).length;
-           return tagCount === 0 || tagCount === 1 && _this.tags.hasOwnProperty('area');
-         };
+           survivor = graph.entity(utilOldestID(nodeIDs)); // 1. disable if the nodes being connected have conflicting relation roles
 
-         _this.addable = function (val) {
-           if (!arguments.length) return _addable;
-           _addable = val;
-           return _this;
-         };
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             relations = graph.parentRelations(node);
 
-         _this.reference = function () {
-           // Lookup documentation on Wikidata...
-           var qid = _this.tags.wikidata || _this.tags['brand:wikidata'] || _this.tags['operator:wikidata'];
+             for (j = 0; j < relations.length; j++) {
+               relation = relations[j];
+               role = relation.memberById(node.id).role || ''; // if this node is a via node in a restriction, remember for later
 
-           if (qid) {
-             return {
-               qid: qid
-             };
-           } // Lookup documentation on OSM Wikibase...
+               if (relation.hasFromViaTo()) {
+                 restrictionIDs.push(relation.id);
+               }
 
+               if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
+                 return 'relation';
+               } else {
+                 seen[relation.id] = role;
+               }
+             }
+           } // gather restrictions for parent ways
 
-           var key = _this.originalReference.key || Object.keys(utilObjectOmit(_this.tags, 'name'))[0];
-           var value = _this.originalReference.value || _this.tags[key];
 
-           if (value === '*') {
-             return {
-               key: key
-             };
-           } else {
-             return {
-               key: key,
-               value: value
-             };
-           }
-         };
+           for (i = 0; i < nodeIDs.length; i++) {
+             node = graph.entity(nodeIDs[i]);
+             var parents = graph.parentWays(node);
 
-         _this.unsetTags = function (tags, geometry, skipFieldDefaults) {
-           tags = utilObjectOmit(tags, Object.keys(_this.removeTags));
+             for (j = 0; j < parents.length; j++) {
+               var parent = parents[j];
+               relations = graph.parentRelations(parent);
 
-           if (geometry && !skipFieldDefaults) {
-             _this.fields().forEach(function (field) {
-               if (field.matchGeometry(geometry) && field.key && field["default"] === tags[field.key]) {
-                 delete tags[field.key];
+               for (k = 0; k < relations.length; k++) {
+                 relation = relations[k];
+
+                 if (relation.hasFromViaTo()) {
+                   restrictionIDs.push(relation.id);
+                 }
                }
-             });
-           }
+             }
+           } // test restrictions
 
-           delete tags.area;
-           return tags;
-         };
 
-         _this.setTags = function (tags, geometry, skipFieldDefaults) {
-           var addTags = _this.addTags;
-           tags = Object.assign({}, tags); // shallow copy
+           restrictionIDs = utilArrayUniq(restrictionIDs);
 
-           for (var k in addTags) {
-             if (addTags[k] === '*') {
-               tags[k] = 'yes';
-             } else {
-               tags[k] = addTags[k];
-             }
-           } // Add area=yes if necessary.
-           // This is necessary if the geometry is already an area (e.g. user drew an area) AND any of:
-           // 1. chosen preset could be either an area or a line (`barrier=city_wall`)
-           // 2. chosen preset doesn't have a key in osmAreaKeys (`railway=station`)
+           for (i = 0; i < restrictionIDs.length; i++) {
+             relation = graph.entity(restrictionIDs[i]);
+             if (!relation.isComplete(graph)) continue;
+             var memberWays = relation.members.filter(function (m) {
+               return m.type === 'way';
+             }).map(function (m) {
+               return graph.entity(m.id);
+             });
+             memberWays = utilArrayUniq(memberWays);
+             var f = relation.memberByRole('from');
+             var t = relation.memberByRole('to');
+             var isUturn = f.id === t.id; // 2a. disable if connection would damage a restriction
+             // (a key node is a node at the junction of ways)
 
+             var nodes = {
+               from: [],
+               via: [],
+               to: [],
+               keyfrom: [],
+               keyto: []
+             };
 
-           if (!addTags.hasOwnProperty('area')) {
-             delete tags.area;
+             for (j = 0; j < relation.members.length; j++) {
+               collectNodes(relation.members[j], nodes);
+             }
 
-             if (geometry === 'area') {
-               var needsAreaTag = true;
+             nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
+             nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
+             var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
+             nodes.from = nodes.from.filter(filter);
+             nodes.via = nodes.via.filter(filter);
+             nodes.to = nodes.to.filter(filter);
+             var connectFrom = false;
+             var connectVia = false;
+             var connectTo = false;
+             var connectKeyFrom = false;
+             var connectKeyTo = false;
 
-               if (_this.geometry.indexOf('line') === -1) {
-                 for (var _k2 in addTags) {
-                   if (_k2 in osmAreaKeys) {
-                     needsAreaTag = false;
-                     break;
-                   }
-                 }
+             for (j = 0; j < nodeIDs.length; j++) {
+               var n = nodeIDs[j];
+
+               if (nodes.from.indexOf(n) !== -1) {
+                 connectFrom = true;
                }
 
-               if (needsAreaTag) {
-                 tags.area = 'yes';
+               if (nodes.via.indexOf(n) !== -1) {
+                 connectVia = true;
                }
-             }
-           }
 
-           if (geometry && !skipFieldDefaults) {
-             _this.fields().forEach(function (field) {
-               if (field.matchGeometry(geometry) && field.key && !tags[field.key] && field["default"]) {
-                 tags[field.key] = field["default"];
+               if (nodes.to.indexOf(n) !== -1) {
+                 connectTo = true;
                }
-             });
-           }
 
-           return tags;
-         }; // For a preset without fields, use the fields of the parent preset.
-         // Replace {preset} placeholders with the fields of the specified presets.
+               if (nodes.keyfrom.indexOf(n) !== -1) {
+                 connectKeyFrom = true;
+               }
 
+               if (nodes.keyto.indexOf(n) !== -1) {
+                 connectKeyTo = true;
+               }
+             }
 
-         function resolve(which) {
-           var fieldIDs = which === 'fields' ? _this.originalFields : _this.originalMoreFields;
-           var resolved = [];
-           fieldIDs.forEach(function (fieldID) {
-             var match = fieldID.match(/\{(.*)\}/);
+             if (connectFrom && connectTo && !isUturn) {
+               return 'restriction';
+             }
 
-             if (match !== null) {
-               // a presetID wrapped in braces {}
-               resolved = resolved.concat(inheritFields(match[1], which));
-             } else if (allFields[fieldID]) {
-               // a normal fieldID
-               resolved.push(allFields[fieldID]);
-             } else {
-               console.log("Cannot resolve \"".concat(fieldID, "\" found in ").concat(_this.id, ".").concat(which)); // eslint-disable-line no-console
+             if (connectFrom && connectVia) {
+               return 'restriction';
              }
-           }); // no fields resolved, so use the parent's if possible
 
-           if (!resolved.length) {
-             var endIndex = _this.id.lastIndexOf('/');
+             if (connectTo && connectVia) {
+               return 'restriction';
+             } // connecting to a key node -
+             // if both nodes are on a member way (i.e. part of the turn restriction),
+             // the connecting node must be adjacent to the key node.
 
-             var parentID = endIndex && _this.id.substring(0, endIndex);
 
-             if (parentID) {
-               resolved = inheritFields(parentID, which);
-             }
-           }
+             if (connectKeyFrom || connectKeyTo) {
+               if (nodeIDs.length !== 2) {
+                 return 'restriction';
+               }
 
-           return utilArrayUniq(resolved); // returns an array of fields to inherit from the given presetID, if found
+               var n0 = null;
+               var n1 = null;
 
-           function inheritFields(presetID, which) {
-             var parent = allPresets[presetID];
-             if (!parent) return [];
+               for (j = 0; j < memberWays.length; j++) {
+                 way = memberWays[j];
 
-             if (which === 'fields') {
-               return parent.fields().filter(shouldInherit);
-             } else if (which === 'moreFields') {
-               return parent.moreFields();
-             } else {
-               return [];
-             }
-           } // Skip `fields` for the keys which define the preset.
-           // These are usually `typeCombo` fields like `shop=*`
+                 if (way.contains(nodeIDs[0])) {
+                   n0 = nodeIDs[0];
+                 }
 
+                 if (way.contains(nodeIDs[1])) {
+                   n1 = nodeIDs[1];
+                 }
+               }
 
-           function shouldInherit(f) {
-             if (f.key && _this.tags[f.key] !== undefined && // inherit anyway if multiple values are allowed or just a checkbox
-             f.type !== 'multiCombo' && f.type !== 'semiCombo' && f.type !== 'manyCombo' && f.type !== 'check') return false;
-             return true;
-           }
-         }
+               if (n0 && n1) {
+                 // both nodes are part of the restriction
+                 var ok = false;
 
-         return _this;
-       }
+                 for (j = 0; j < memberWays.length; j++) {
+                   way = memberWays[j];
 
-       var _mainPresetIndex = presetIndex(); // singleton
-       // `presetIndex` wraps a `presetCollection`
-       // with methods for loading new data and returning defaults
-       //
+                   if (way.areAdjacent(n0, n1)) {
+                     ok = true;
+                     break;
+                   }
+                 }
 
-       function presetIndex() {
-         var dispatch$1 = dispatch('favoritePreset', 'recentsChange');
-         var MAXRECENTS = 30; // seed the preset lists with geometry fallbacks
+                 if (!ok) {
+                   return 'restriction';
+                 }
+               }
+             } // 2b. disable if nodes being connected will destroy a member way in a restriction
+             // (to test, make a copy and try actually connecting the nodes)
 
-         var POINT = presetPreset('point', {
-           name: 'Point',
-           tags: {},
-           geometry: ['point', 'vertex'],
-           matchScore: 0.1
-         });
-         var LINE = presetPreset('line', {
-           name: 'Line',
-           tags: {},
-           geometry: ['line'],
-           matchScore: 0.1
-         });
-         var AREA = presetPreset('area', {
-           name: 'Area',
-           tags: {
-             area: 'yes'
-           },
-           geometry: ['area'],
-           matchScore: 0.1
-         });
-         var RELATION = presetPreset('relation', {
-           name: 'Relation',
-           tags: {},
-           geometry: ['relation'],
-           matchScore: 0.1
-         });
 
-         var _this = presetCollection([POINT, LINE, AREA, RELATION]);
+             for (j = 0; j < memberWays.length; j++) {
+               way = memberWays[j].update({}); // make copy
 
-         var _presets = {
-           point: POINT,
-           line: LINE,
-           area: AREA,
-           relation: RELATION
-         };
-         var _defaults = {
-           point: presetCollection([POINT]),
-           vertex: presetCollection([POINT]),
-           line: presetCollection([LINE]),
-           area: presetCollection([AREA]),
-           relation: presetCollection([RELATION])
-         };
-         var _fields = {};
-         var _categories = {};
-         var _universal = [];
-         var _addablePresetIDs = null; // Set of preset IDs that the user can add
+               for (k = 0; k < nodeIDs.length; k++) {
+                 if (nodeIDs[k] === survivor.id) continue;
 
-         var _recents;
+                 if (way.areAdjacent(nodeIDs[k], survivor.id)) {
+                   way = way.removeNode(nodeIDs[k]);
+                 } else {
+                   way = way.replaceNode(nodeIDs[k], survivor.id);
+                 }
+               }
 
-         var _favorites; // Index of presets by (geometry, tag key).
+               if (way.isDegenerate()) {
+                 return 'restriction';
+               }
+             }
+           }
 
+           return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
 
-         var _geometryIndex = {
-           point: {},
-           vertex: {},
-           line: {},
-           area: {},
-           relation: {}
-         };
+           function hasDuplicates(n, i, arr) {
+             return arr.indexOf(n) !== arr.lastIndexOf(n);
+           }
 
-         var _loadPromise;
+           function keyNodeFilter(froms, tos) {
+             return function (n) {
+               return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
+             };
+           }
 
-         _this.ensureLoaded = function () {
-           if (_loadPromise) return _loadPromise;
-           return _loadPromise = Promise.all([_mainFileFetcher.get('preset_categories'), _mainFileFetcher.get('preset_defaults'), _mainFileFetcher.get('preset_presets'), _mainFileFetcher.get('preset_fields')]).then(function (vals) {
-             _this.merge({
-               categories: vals[0],
-               defaults: vals[1],
-               presets: vals[2],
-               fields: vals[3]
-             });
+           function collectNodes(member, collection) {
+             var entity = graph.hasEntity(member.id);
+             if (!entity) return;
+             var role = member.role || '';
 
-             osmSetAreaKeys(_this.areaKeys());
-             osmSetPointTags(_this.pointTags());
-             osmSetVertexTags(_this.vertexTags());
-           });
-         };
+             if (!collection[role]) {
+               collection[role] = [];
+             }
 
-         _this.merge = function (d) {
-           // Merge Fields
-           if (d.fields) {
-             Object.keys(d.fields).forEach(function (fieldID) {
-               var f = d.fields[fieldID];
+             if (member.type === 'node') {
+               collection[role].push(member.id);
 
-               if (f) {
-                 // add or replace
-                 _fields[fieldID] = presetField(fieldID, f);
-               } else {
-                 // remove
-                 delete _fields[fieldID];
+               if (role === 'via') {
+                 collection.keyfrom.push(member.id);
+                 collection.keyto.push(member.id);
                }
-             });
-           } // Merge Presets
-
+             } else if (member.type === 'way') {
+               collection[role].push.apply(collection[role], entity.nodes);
 
-           if (d.presets) {
-             Object.keys(d.presets).forEach(function (presetID) {
-               var p = d.presets[presetID];
+               if (role === 'from' || role === 'via') {
+                 collection.keyfrom.push(entity.first());
+                 collection.keyfrom.push(entity.last());
+               }
 
-               if (p) {
-                 // add or replace
-                 var isAddable = !_addablePresetIDs || _addablePresetIDs.has(presetID);
+               if (role === 'to' || role === 'via') {
+                 collection.keyto.push(entity.first());
+                 collection.keyto.push(entity.last());
+               }
+             }
+           }
+         };
 
-                 _presets[presetID] = presetPreset(presetID, p, isAddable, _fields, _presets);
-               } else {
-                 // remove (but not if it's a fallback)
-                 var existing = _presets[presetID];
+         return action;
+       }
 
-                 if (existing && !existing.isFallback()) {
-                   delete _presets[presetID];
-                 }
-               }
-             });
-           } // Need to rebuild _this.collection before loading categories
+       function actionCopyEntities(ids, fromGraph) {
+         var _copies = {};
 
+         var action = function action(graph) {
+           ids.forEach(function (id) {
+             fromGraph.entity(id).copy(fromGraph, _copies);
+           });
 
-           _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Categories
+           for (var id in _copies) {
+             graph = graph.replace(_copies[id]);
+           }
 
-           if (d.categories) {
-             Object.keys(d.categories).forEach(function (categoryID) {
-               var c = d.categories[categoryID];
+           return graph;
+         };
 
-               if (c) {
-                 // add or replace
-                 _categories[categoryID] = presetCategory(categoryID, c, _this);
-               } else {
-                 // remove
-                 delete _categories[categoryID];
-               }
-             });
-           } // Rebuild _this.collection after loading categories
+         action.copies = function () {
+           return _copies;
+         };
 
+         return action;
+       }
 
-           _this.collection = Object.values(_presets).concat(Object.values(_categories)); // Merge Defaults
+       function actionDeleteMember(relationId, memberIndex) {
+         return function (graph) {
+           var relation = graph.entity(relationId).removeMember(memberIndex);
+           graph = graph.replace(relation);
 
-           if (d.defaults) {
-             Object.keys(d.defaults).forEach(function (geometry) {
-               var def = d.defaults[geometry];
+           if (relation.isDegenerate()) {
+             graph = actionDeleteRelation(relation.id)(graph);
+           }
 
-               if (Array.isArray(def)) {
-                 // add or replace
-                 _defaults[geometry] = presetCollection(def.map(function (id) {
-                   return _presets[id] || _categories[id];
-                 }).filter(Boolean));
-               } else {
-                 // remove
-                 delete _defaults[geometry];
-               }
-             });
-           } // Rebuild universal fields array
+           return graph;
+         };
+       }
 
+       function actionDiscardTags(difference, discardTags) {
+         discardTags = discardTags || {};
+         return function (graph) {
+           difference.modified().forEach(checkTags);
+           difference.created().forEach(checkTags);
+           return graph;
 
-           _universal = Object.values(_fields).filter(function (field) {
-             return field.universal;
-           }); // Reset all the preset fields - they'll need to be resolved again
+           function checkTags(entity) {
+             var keys = Object.keys(entity.tags);
+             var didDiscard = false;
+             var tags = {};
 
-           Object.values(_presets).forEach(function (preset) {
-             return preset.resetFields();
-           }); // Rebuild geometry index
+             for (var i = 0; i < keys.length; i++) {
+               var k = keys[i];
 
-           _geometryIndex = {
-             point: {},
-             vertex: {},
-             line: {},
-             area: {},
-             relation: {}
-           };
+               if (discardTags[k] || !entity.tags[k]) {
+                 didDiscard = true;
+               } else {
+                 tags[k] = entity.tags[k];
+               }
+             }
 
-           _this.collection.forEach(function (preset) {
-             (preset.geometry || []).forEach(function (geometry) {
-               var g = _geometryIndex[geometry];
+             if (didDiscard) {
+               graph = graph.replace(entity.update({
+                 tags: tags
+               }));
+             }
+           }
+         };
+       }
 
-               for (var key in preset.tags) {
-                 (g[key] = g[key] || []).push(preset);
-               }
-             });
-           });
+       //
+       // Optionally, disconnect only the given ways.
+       //
+       // For testing convenience, accepts an ID to assign to the (first) new node.
+       // Normally, this will be undefined and the way will automatically
+       // be assigned a new ID.
+       //
+       // This is the inverse of `iD.actionConnect`.
+       //
+       // Reference:
+       //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
+       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
+       //
 
-           return _this;
+       function actionDisconnect(nodeId, newNodeId) {
+         var wayIds;
+         var disconnectableRelationTypes = {
+           'associatedStreet': true,
+           'enforcement': true,
+           'site': true
          };
 
-         _this.match = function (entity, resolver) {
-           return resolver["transient"](entity, 'presetMatch', function () {
-             var geometry = entity.geometry(resolver); // Treat entities on addr:interpolation lines as points, not vertices - #3241
+         var action = function action(graph) {
+           var node = graph.entity(nodeId);
+           var connections = action.connections(graph);
+           connections.forEach(function (connection) {
+             var way = graph.entity(connection.wayID);
+             var newNode = osmNode({
+               id: newNodeId,
+               loc: node.loc,
+               tags: node.tags
+             });
+             graph = graph.replace(newNode);
 
-             if (geometry === 'vertex' && entity.isOnAddressLine(resolver)) {
-               geometry = 'point';
+             if (connection.index === 0 && way.isArea()) {
+               // replace shared node with shared node..
+               graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
+             } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
+               // replace closing node with new new node..
+               graph = graph.replace(way.unclose().addNode(newNode.id));
+             } else {
+               // replace shared node with multiple new nodes..
+               graph = graph.replace(way.updateNode(newNode.id, connection.index));
              }
-
-             return _this.matchTags(entity.tags, geometry);
            });
+           return graph;
          };
 
-         _this.matchTags = function (tags, geometry) {
-           var geometryMatches = _geometryIndex[geometry];
-           var address;
-           var best = -1;
-           var match;
+         action.connections = function (graph) {
+           var candidates = [];
+           var keeping = false;
+           var parentWays = graph.parentWays(graph.entity(nodeId));
+           var way, waynode;
 
-           for (var k in tags) {
-             // If any part of an address is present, allow fallback to "Address" preset - #4353
-             if (/^addr:/.test(k) && geometryMatches['addr:*']) {
-               address = geometryMatches['addr:*'][0];
+           for (var i = 0; i < parentWays.length; i++) {
+             way = parentWays[i];
+
+             if (wayIds && wayIds.indexOf(way.id) === -1) {
+               keeping = true;
+               continue;
              }
 
-             var keyMatches = geometryMatches[k];
-             if (!keyMatches) continue;
+             if (way.isArea() && way.nodes[0] === nodeId) {
+               candidates.push({
+                 wayID: way.id,
+                 index: 0
+               });
+             } else {
+               for (var j = 0; j < way.nodes.length; j++) {
+                 waynode = way.nodes[j];
 
-             for (var i = 0; i < keyMatches.length; i++) {
-               var score = keyMatches[i].matchScore(tags);
+                 if (waynode === nodeId) {
+                   if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
+                     continue;
+                   }
 
-               if (score > best) {
-                 best = score;
-                 match = keyMatches[i];
+                   candidates.push({
+                     wayID: way.id,
+                     index: j
+                   });
+                 }
                }
              }
            }
 
-           if (address && (!match || match.isFallback())) {
-             match = address;
-           }
-
-           return match || _this.fallback(geometry);
+           return keeping ? candidates : candidates.slice(1);
          };
 
-         _this.allowsVertex = function (entity, resolver) {
-           if (entity.type !== 'node') return false;
-           if (Object.keys(entity.tags).length === 0) return true;
-           return resolver["transient"](entity, 'vertexMatch', function () {
-             // address lines allow vertices to act as standalone points
-             if (entity.isOnAddressLine(resolver)) return true;
-             var geometries = osmNodeGeometriesForTags(entity.tags);
-             if (geometries.vertex) return true;
-             if (geometries.point) return false; // allow vertices for unspecified points
-
-             return true;
+         action.disabled = function (graph) {
+           var connections = action.connections(graph);
+           if (connections.length === 0) return 'not_connected';
+           var parentWays = graph.parentWays(graph.entity(nodeId));
+           var seenRelationIds = {};
+           var sharedRelation;
+           parentWays.forEach(function (way) {
+             var relations = graph.parentRelations(way);
+             relations.filter(function (relation) {
+               return !disconnectableRelationTypes[relation.tags.type];
+             }).forEach(function (relation) {
+               if (relation.id in seenRelationIds) {
+                 if (wayIds) {
+                   if (wayIds.indexOf(way.id) !== -1 || wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
+                     sharedRelation = relation;
+                   }
+                 } else {
+                   sharedRelation = relation;
+                 }
+               } else {
+                 seenRelationIds[relation.id] = way.id;
+               }
+             });
            });
-         }; // Because of the open nature of tagging, iD will never have a complete
-         // list of tags used in OSM, so we want it to have logic like "assume
-         // that a closed way with an amenity tag is an area, unless the amenity
-         // is one of these specific types". This function computes a structure
-         // that allows testing of such conditions, based on the presets designated
-         // as as supporting (or not supporting) the area geometry.
-         //
-         // The returned object L is a keeplist/discardlist of tags. A closed way
-         // with a tag (k, v) is considered to be an area if `k in L && !(v in L[k])`
-         // (see `Way#isArea()`). In other words, the keys of L form the keeplist,
-         // and the subkeys form the discardlist.
-
-
-         _this.areaKeys = function () {
-           // The ignore list is for keys that imply lines. (We always add `area=yes` for exceptions)
-           var ignore = ['barrier', 'highway', 'footway', 'railway', 'junction', 'type'];
-           var areaKeys = {}; // ignore name-suggestion-index and deprecated presets
+           if (sharedRelation) return 'relation';
+         };
 
-           var presets = _this.collection.filter(function (p) {
-             return !p.suggestion && !p.replacement;
-           }); // keeplist
+         action.limitWays = function (val) {
+           if (!arguments.length) return wayIds;
+           wayIds = val;
+           return action;
+         };
 
+         return action;
+       }
 
-           presets.forEach(function (p) {
-             var keys = p.tags && Object.keys(p.tags);
-             var key = keys && keys.length && keys[0]; // pick the first tag
+       function actionExtract(entityID, projection) {
+         var extractedNodeID;
 
-             if (!key) return;
-             if (ignore.indexOf(key) !== -1) return;
+         var action = function action(graph) {
+           var entity = graph.entity(entityID);
 
-             if (p.geometry.indexOf('area') !== -1) {
-               // probably an area..
-               areaKeys[key] = areaKeys[key] || {};
-             }
-           }); // discardlist
+           if (entity.type === 'node') {
+             return extractFromNode(entity, graph);
+           }
 
-           presets.forEach(function (p) {
-             var key;
+           return extractFromWayOrRelation(entity, graph);
+         };
 
-             for (key in p.addTags) {
-               // examine all addTags to get a better sense of what can be tagged on lines - #6800
-               var value = p.addTags[key];
+         function extractFromNode(node, graph) {
+           extractedNodeID = node.id; // Create a new node to replace the one we will detach
 
-               if (key in areaKeys && // probably an area...
-               p.geometry.indexOf('line') !== -1 && // but sometimes a line
-               value !== '*') {
-                 areaKeys[key][value] = true;
-               }
-             }
+           var replacement = osmNode({
+             loc: node.loc
            });
-           return areaKeys;
-         };
-
-         _this.pointTags = function () {
-           return _this.collection.reduce(function (pointTags, d) {
-             // ignore name-suggestion-index, deprecated, and generic presets
-             if (d.suggestion || d.replacement || d.searchable === false) return pointTags; // only care about the primary tag
+           graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
 
-             var keys = d.tags && Object.keys(d.tags);
-             var key = keys && keys.length && keys[0]; // pick the first tag
+           graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
+             return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
+           }, graph); // Process any relations too
 
-             if (!key) return pointTags; // if this can be a point
+           return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
+             return accGraph.replace(parentRel.replaceMember(node, replacement));
+           }, graph);
+         }
 
-             if (d.geometry.indexOf('point') !== -1) {
-               pointTags[key] = pointTags[key] || {};
-               pointTags[key][d.tags[key]] = true;
-             }
+         function extractFromWayOrRelation(entity, graph) {
+           var fromGeometry = entity.geometry(graph);
+           var keysToCopyAndRetain = ['source', 'wheelchair'];
+           var keysToRetain = ['area'];
+           var buildingKeysToRetain = ['architect', 'building', 'height', 'layer'];
+           var extractedLoc = d3_geoPath(projection).centroid(entity.asGeoJSON(graph));
+           extractedLoc = extractedLoc && projection.invert(extractedLoc);
 
-             return pointTags;
-           }, {});
-         };
+           if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
+             extractedLoc = entity.extent(graph).center();
+           }
 
-         _this.vertexTags = function () {
-           return _this.collection.reduce(function (vertexTags, d) {
-             // ignore name-suggestion-index, deprecated, and generic presets
-             if (d.suggestion || d.replacement || d.searchable === false) return vertexTags; // only care about the primary tag
+           var indoorAreaValues = {
+             area: true,
+             corridor: true,
+             elevator: true,
+             level: true,
+             room: true
+           };
+           var isBuilding = entity.tags.building && entity.tags.building !== 'no' || entity.tags['building:part'] && entity.tags['building:part'] !== 'no';
+           var isIndoorArea = fromGeometry === 'area' && entity.tags.indoor && indoorAreaValues[entity.tags.indoor];
+           var entityTags = Object.assign({}, entity.tags); // shallow copy
 
-             var keys = d.tags && Object.keys(d.tags);
-             var key = keys && keys.length && keys[0]; // pick the first tag
+           var pointTags = {};
 
-             if (!key) return vertexTags; // if this can be a vertex
+           for (var key in entityTags) {
+             if (entity.type === 'relation' && key === 'type') {
+               continue;
+             }
 
-             if (d.geometry.indexOf('vertex') !== -1) {
-               vertexTags[key] = vertexTags[key] || {};
-               vertexTags[key][d.tags[key]] = true;
+             if (keysToRetain.indexOf(key) !== -1) {
+               continue;
              }
 
-             return vertexTags;
-           }, {});
-         };
+             if (isBuilding) {
+               // don't transfer building-related tags
+               if (buildingKeysToRetain.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+             } // leave `indoor` tag on the area
 
-         _this.field = function (id) {
-           return _fields[id];
-         };
 
-         _this.universal = function () {
-           return _universal;
-         };
+             if (isIndoorArea && key === 'indoor') {
+               continue;
+             } // copy the tag from the entity to the point
 
-         _this.defaults = function (geometry, n, startWithRecents) {
-           var recents = [];
 
-           if (startWithRecents) {
-             recents = _this.recent().matchGeometry(geometry).collection.slice(0, 4);
-           }
+             pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
 
-           var defaults;
+             if (keysToCopyAndRetain.indexOf(key) !== -1 || key.match(/^addr:.{1,}/)) {
+               continue;
+             } else if (isIndoorArea && key === 'level') {
+               // leave `level` on both features
+               continue;
+             } // remove the tag from the entity
 
-           if (_addablePresetIDs) {
-             defaults = Array.from(_addablePresetIDs).map(function (id) {
-               var preset = _this.item(id);
 
-               if (preset && preset.matchGeometry(geometry)) return preset;
-               return null;
-             }).filter(Boolean);
-           } else {
-             defaults = _defaults[geometry].collection.concat(_this.fallback(geometry));
+             delete entityTags[key];
            }
 
-           return presetCollection(utilArrayUniq(recents.concat(defaults)).slice(0, n - 1));
-         }; // pass a Set of addable preset ids
+           if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
+             // ensure that areas keep area geometry
+             entityTags.area = 'yes';
+           }
 
+           var replacement = osmNode({
+             loc: extractedLoc,
+             tags: pointTags
+           });
+           graph = graph.replace(replacement);
+           extractedNodeID = replacement.id;
+           return graph.replace(entity.update({
+             tags: entityTags
+           }));
+         }
 
-         _this.addablePresetIDs = function (val) {
-           if (!arguments.length) return _addablePresetIDs; // accept and convert arrays
+         action.getExtractedNodeID = function () {
+           return extractedNodeID;
+         };
 
-           if (Array.isArray(val)) val = new Set(val);
-           _addablePresetIDs = val;
+         return action;
+       }
 
-           if (_addablePresetIDs) {
-             // reset all presets
-             _this.collection.forEach(function (p) {
-               // categories aren't addable
-               if (p.addable) p.addable(_addablePresetIDs.has(p.id));
-             });
-           } else {
-             _this.collection.forEach(function (p) {
-               if (p.addable) p.addable(true);
-             });
-           }
+       //
+       // This is the inverse of `iD.actionSplit`.
+       //
+       // Reference:
+       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
+       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
+       //
 
-           return _this;
-         };
+       function actionJoin(ids) {
+         function groupEntitiesByGeometry(graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           return Object.assign({
+             line: []
+           }, utilArrayGroupBy(entities, function (entity) {
+             return entity.geometry(graph);
+           }));
+         }
 
-         _this.recent = function () {
-           return presetCollection(utilArrayUniq(_this.getRecents().map(function (d) {
-             return d.preset;
-           })));
-         };
+         var action = function action(graph) {
+           var ways = ids.map(graph.entity, graph); // Prefer to keep an existing way.
+           // if there are multiple existing ways, keep the oldest one
+           // the oldest way is determined by the ID of the way.
 
-         function RibbonItem(preset, source) {
-           var item = {};
-           item.preset = preset;
-           item.source = source;
+           var survivorID = utilOldestID(ways.map(function (way) {
+             return way.id;
+           })); // if any of the ways are sided (e.g. coastline, cliff, kerb)
+           // sort them first so they establish the overall order - #6033
 
-           item.isFavorite = function () {
-             return item.source === 'favorite';
-           };
+           ways.sort(function (a, b) {
+             var aSided = a.isSided();
+             var bSided = b.isSided();
+             return aSided && !bSided ? -1 : bSided && !aSided ? 1 : 0;
+           });
+           var sequences = osmJoinWays(ways, graph);
+           var joined = sequences[0]; // We might need to reverse some of these ways before joining them.  #4688
+           // `joined.actions` property will contain any actions we need to apply.
 
-           item.isRecent = function () {
-             return item.source === 'recent';
-           };
+           graph = sequences.actions.reduce(function (g, action) {
+             return action(g);
+           }, graph);
+           var survivor = graph.entity(survivorID);
+           survivor = survivor.update({
+             nodes: joined.nodes.map(function (n) {
+               return n.id;
+             })
+           });
+           graph = graph.replace(survivor);
+           joined.forEach(function (way) {
+             if (way.id === survivorID) return;
+             graph.parentRelations(way).forEach(function (parent) {
+               graph = graph.replace(parent.replaceMember(way, survivor));
+             });
+             survivor = survivor.mergeTags(way.tags);
+             graph = graph.replace(survivor);
+             graph = actionDeleteWay(way.id)(graph);
+           }); // Finds if the join created a single-member multipolygon,
+           // and if so turns it into a basic area instead
 
-           item.matches = function (preset) {
-             return item.preset.id === preset.id;
-           };
+           function checkForSimpleMultipolygon() {
+             if (!survivor.isClosed()) return;
+             var multipolygons = graph.parentMultipolygons(survivor).filter(function (multipolygon) {
+               // find multipolygons where the survivor is the only member
+               return multipolygon.members.length === 1;
+             }); // skip if this is the single member of multiple multipolygons
 
-           item.minified = function () {
-             return {
-               pID: item.preset.id
-             };
-           };
+             if (multipolygons.length !== 1) return;
+             var multipolygon = multipolygons[0];
 
-           return item;
-         }
+             for (var key in survivor.tags) {
+               if (multipolygon.tags[key] && // don't collapse if tags cannot be cleanly merged
+               multipolygon.tags[key] !== survivor.tags[key]) return;
+             }
 
-         function ribbonItemForMinified(d, source) {
-           if (d && d.pID) {
-             var preset = _this.item(d.pID);
+             survivor = survivor.mergeTags(multipolygon.tags);
+             graph = graph.replace(survivor);
+             graph = actionDeleteRelation(multipolygon.id, true
+             /* allow untagged members */
+             )(graph);
+             var tags = Object.assign({}, survivor.tags);
 
-             if (!preset) return null;
-             return RibbonItem(preset, source);
+             if (survivor.geometry(graph) !== 'area') {
+               // ensure the feature persists as an area
+               tags.area = 'yes';
+             }
+
+             delete tags.type; // remove type=multipolygon
+
+             survivor = survivor.update({
+               tags: tags
+             });
+             graph = graph.replace(survivor);
            }
 
-           return null;
-         }
+           checkForSimpleMultipolygon();
+           return graph;
+         }; // Returns the number of nodes the resultant way is expected to have
 
-         _this.getGenericRibbonItems = function () {
-           return ['point', 'line', 'area'].map(function (id) {
-             return RibbonItem(_this.item(id), 'generic');
-           });
+
+         action.resultingWayNodesLength = function (graph) {
+           return ids.reduce(function (count, id) {
+             return count + graph.entity(id).nodes.length;
+           }, 0) - ids.length - 1;
          };
 
-         _this.getAddable = function () {
-           if (!_addablePresetIDs) return [];
-           return _addablePresetIDs.map(function (id) {
-             var preset = _this.item(id);
+         action.disabled = function (graph) {
+           var geometries = groupEntitiesByGeometry(graph);
 
-             if (preset) return RibbonItem(preset, 'addable');
-             return null;
-           }).filter(Boolean);
-         };
+           if (ids.length < 2 || ids.length !== geometries.line.length) {
+             return 'not_eligible';
+           }
 
-         function setRecents(items) {
-           _recents = items;
-           var minifiedItems = items.map(function (d) {
-             return d.minified();
-           });
-           corePreferences('preset_recents', JSON.stringify(minifiedItems));
-           dispatch$1.call('recentsChange');
-         }
+           var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
 
-         _this.getRecents = function () {
-           if (!_recents) {
-             // fetch from local storage
-             _recents = (JSON.parse(corePreferences('preset_recents')) || []).reduce(function (acc, d) {
-               var item = ribbonItemForMinified(d, 'recent');
-               if (item && item.preset.addable()) acc.push(item);
-               return acc;
-             }, []);
+           if (joined.length > 1) {
+             return 'not_adjacent';
            }
 
-           return _recents;
-         };
+           var i; // All joined ways must belong to the same set of (non-restriction) relations.
+           // Restriction relations have different logic, below, which allows some cases
+           // this prohibits, and prohibits some cases this allows.
 
-         _this.addRecent = function (preset, besidePreset, after) {
-           var recents = _this.getRecents();
+           var sortedParentRelations = function sortedParentRelations(id) {
+             return graph.parentRelations(graph.entity(id)).filter(function (rel) {
+               return !rel.isRestriction() && !rel.isConnectivity();
+             }).sort(function (a, b) {
+               return a.id - b.id;
+             });
+           };
 
-           var beforeItem = _this.recentMatching(besidePreset);
+           var relsA = sortedParentRelations(ids[0]);
+
+           for (i = 1; i < ids.length; i++) {
+             var relsB = sortedParentRelations(ids[i]);
+
+             if (!utilArrayIdentical(relsA, relsB)) {
+               return 'conflicting_relations';
+             }
+           } // Loop through all combinations of path-pairs
+           // to check potential intersections between all pairs
 
-           var toIndex = recents.indexOf(beforeItem);
-           if (after) toIndex += 1;
-           var newItem = RibbonItem(preset, 'recent');
-           recents.splice(toIndex, 0, newItem);
-           setRecents(recents);
-         };
 
-         _this.removeRecent = function (preset) {
-           var item = _this.recentMatching(preset);
+           for (i = 0; i < ids.length - 1; i++) {
+             for (var j = i + 1; j < ids.length; j++) {
+               var path1 = graph.childNodes(graph.entity(ids[i])).map(function (e) {
+                 return e.loc;
+               });
+               var path2 = graph.childNodes(graph.entity(ids[j])).map(function (e) {
+                 return e.loc;
+               });
+               var intersections = geoPathIntersections(path1, path2); // Check if intersections are just nodes lying on top of
+               // each other/the line, as opposed to crossing it
 
-           if (item) {
-             var items = _this.getRecents();
+               var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
+                 return n.loc.toString();
+               }), intersections.map(function (n) {
+                 return n.toString();
+               }));
 
-             items.splice(items.indexOf(item), 1);
-             setRecents(items);
+               if (common.length !== intersections.length) {
+                 return 'paths_intersect';
+               }
+             }
            }
-         };
 
-         _this.recentMatching = function (preset) {
-           var items = _this.getRecents();
+           var nodeIds = joined[0].nodes.map(function (n) {
+             return n.id;
+           }).slice(1, -1);
+           var relation;
+           var tags = {};
+           var conflicting = false;
+           joined[0].forEach(function (way) {
+             var parents = graph.parentRelations(way);
+             parents.forEach(function (parent) {
+               if ((parent.isRestriction() || parent.isConnectivity()) && parent.members.some(function (m) {
+                 return nodeIds.indexOf(m.id) >= 0;
+               })) {
+                 relation = parent;
+               }
+             });
 
-           for (var i in items) {
-             if (items[i].matches(preset)) {
-               return items[i];
+             for (var k in way.tags) {
+               if (!(k in tags)) {
+                 tags[k] = way.tags[k];
+               } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
+                 conflicting = true;
+               }
              }
+           });
+
+           if (relation) {
+             return relation.isRestriction() ? 'restriction' : 'connectivity';
            }
 
-           return null;
+           if (conflicting) {
+             return 'conflicting_tags';
+           }
          };
 
-         _this.moveItem = function (items, fromIndex, toIndex) {
-           if (fromIndex === toIndex || fromIndex < 0 || toIndex < 0 || fromIndex >= items.length || toIndex >= items.length) return null;
-           items.splice(toIndex, 0, items.splice(fromIndex, 1)[0]);
-           return items;
-         };
+         return action;
+       }
 
-         _this.moveRecent = function (item, beforeItem) {
-           var recents = _this.getRecents();
+       function actionMerge(ids) {
+         function groupEntitiesByGeometry(graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           return Object.assign({
+             point: [],
+             area: [],
+             line: [],
+             relation: []
+           }, utilArrayGroupBy(entities, function (entity) {
+             return entity.geometry(graph);
+           }));
+         }
 
-           var fromIndex = recents.indexOf(item);
-           var toIndex = recents.indexOf(beforeItem);
+         var action = function action(graph) {
+           var geometries = groupEntitiesByGeometry(graph);
+           var target = geometries.area[0] || geometries.line[0];
+           var points = geometries.point;
+           points.forEach(function (point) {
+             target = target.mergeTags(point.tags);
+             graph = graph.replace(target);
+             graph.parentRelations(point).forEach(function (parent) {
+               graph = graph.replace(parent.replaceMember(point, target));
+             });
+             var nodes = utilArrayUniq(graph.childNodes(target));
+             var removeNode = point;
 
-           var items = _this.moveItem(recents, fromIndex, toIndex);
+             if (!point.isNew()) {
+               // Try to preserve the original point if it already has
+               // an ID in the database.
+               var inserted = false;
 
-           if (items) setRecents(items);
-         };
+               var canBeReplaced = function canBeReplaced(node) {
+                 return !(graph.parentWays(node).length > 1 || graph.parentRelations(node).length);
+               };
 
-         _this.setMostRecent = function (preset) {
-           if (preset.searchable === false) return;
+               var replaceNode = function replaceNode(node) {
+                 graph = graph.replace(point.update({
+                   tags: node.tags,
+                   loc: node.loc
+                 }));
+                 target = target.replaceNode(node.id, point.id);
+                 graph = graph.replace(target);
+                 removeNode = node;
+                 inserted = true;
+               };
 
-           var items = _this.getRecents();
+               var i;
+               var node; // First, try to replace a new child node on the target way.
 
-           var item = _this.recentMatching(preset);
+               for (i = 0; i < nodes.length; i++) {
+                 node = nodes[i];
 
-           if (item) {
-             items.splice(items.indexOf(item), 1);
-           } else {
-             item = RibbonItem(preset, 'recent');
-           } // remove the last recent (first in, first out)
+                 if (canBeReplaced(node) && node.isNew()) {
+                   replaceNode(node);
+                   break;
+                 }
+               }
 
+               if (!inserted && point.hasInterestingTags()) {
+                 // No new child node found, try to find an existing, but
+                 // uninteresting child node instead.
+                 for (i = 0; i < nodes.length; i++) {
+                   node = nodes[i];
 
-           while (items.length >= MAXRECENTS) {
-             items.pop();
-           } // prepend array
+                   if (canBeReplaced(node) && !node.hasInterestingTags()) {
+                     replaceNode(node);
+                     break;
+                   }
+                 }
 
+                 if (!inserted) {
+                   // Still not inserted, try to find an existing, interesting,
+                   // but more recent child node.
+                   for (i = 0; i < nodes.length; i++) {
+                     node = nodes[i];
 
-           items.unshift(item);
-           setRecents(items);
-         };
+                     if (canBeReplaced(node) && utilCompareIDs(point.id, node.id) < 0) {
+                       replaceNode(node);
+                       break;
+                     }
+                   }
+                 } // If the point still hasn't been inserted, we give up.
+                 // There are more interesting or older nodes on the way.
 
-         function setFavorites(items) {
-           _favorites = items;
-           var minifiedItems = items.map(function (d) {
-             return d.minified();
+               }
+             }
+
+             graph = graph.remove(removeNode);
            });
-           corePreferences('preset_favorites', JSON.stringify(minifiedItems)); // call update
 
-           dispatch$1.call('favoritePreset');
-         }
+           if (target.tags.area === 'yes') {
+             var tags = Object.assign({}, target.tags); // shallow copy
 
-         _this.addFavorite = function (preset, besidePreset, after) {
-           var favorites = _this.getFavorites();
+             delete tags.area;
 
-           var beforeItem = _this.favoriteMatching(besidePreset);
+             if (osmTagSuggestingArea(tags)) {
+               // remove the `area` tag if area geometry is now implied - #3851
+               target = target.update({
+                 tags: tags
+               });
+               graph = graph.replace(target);
+             }
+           }
 
-           var toIndex = favorites.indexOf(beforeItem);
-           if (after) toIndex += 1;
-           var newItem = RibbonItem(preset, 'favorite');
-           favorites.splice(toIndex, 0, newItem);
-           setFavorites(favorites);
+           return graph;
          };
 
-         _this.toggleFavorite = function (preset) {
-           var favs = _this.getFavorites();
-
-           var favorite = _this.favoriteMatching(preset);
-
-           if (favorite) {
-             favs.splice(favs.indexOf(favorite), 1);
-           } else {
-             // only allow 10 favorites
-             if (favs.length === 10) {
-               // remove the last favorite (last in, first out)
-               favs.pop();
-             } // append array
-
+         action.disabled = function (graph) {
+           var geometries = groupEntitiesByGeometry(graph);
 
-             favs.push(RibbonItem(preset, 'favorite'));
+           if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
+             return 'not_eligible';
            }
-
-           setFavorites(favs);
          };
 
-         _this.removeFavorite = function (preset) {
-           var item = _this.favoriteMatching(preset);
+         return action;
+       }
 
-           if (item) {
-             var items = _this.getFavorites();
+       //
+       // 1. move all the nodes to a common location
+       // 2. `actionConnect` them
 
-             items.splice(items.indexOf(item), 1);
-             setFavorites(items);
-           }
-         };
+       function actionMergeNodes(nodeIDs, loc) {
+         // If there is a single "interesting" node, use that as the location.
+         // Otherwise return the average location of all the nodes.
+         function chooseLoc(graph) {
+           if (!nodeIDs.length) return null;
+           var sum = [0, 0];
+           var interestingCount = 0;
+           var interestingLoc;
 
-         _this.getFavorites = function () {
-           if (!_favorites) {
-             // fetch from local storage
-             var rawFavorites = JSON.parse(corePreferences('preset_favorites'));
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var node = graph.entity(nodeIDs[i]);
 
-             if (!rawFavorites) {
-               rawFavorites = [];
-               corePreferences('preset_favorites', JSON.stringify(rawFavorites));
+             if (node.hasInterestingTags()) {
+               interestingLoc = ++interestingCount === 1 ? node.loc : null;
              }
 
-             _favorites = rawFavorites.reduce(function (output, d) {
-               var item = ribbonItemForMinified(d, 'favorite');
-               if (item && item.preset.addable()) output.push(item);
-               return output;
-             }, []);
+             sum = geoVecAdd(sum, node.loc);
            }
 
-           return _favorites;
-         };
+           return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
+         }
 
-         _this.favoriteMatching = function (preset) {
-           var favs = _this.getFavorites();
+         var action = function action(graph) {
+           if (nodeIDs.length < 2) return graph;
+           var toLoc = loc;
 
-           for (var index in favs) {
-             if (favs[index].matches(preset)) {
-               return favs[index];
-             }
+           if (!toLoc) {
+             toLoc = chooseLoc(graph);
            }
 
-           return null;
-         };
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var node = graph.entity(nodeIDs[i]);
 
-         return utilRebind(_this, dispatch$1, 'on');
-       }
+             if (node.loc !== toLoc) {
+               graph = graph.replace(node.move(toLoc));
+             }
+           }
 
-       function utilTagText(entity) {
-         var obj = entity && entity.tags || {};
-         return Object.keys(obj).map(function (k) {
-           return k + '=' + obj[k];
-         }).join(', ');
-       }
-       function utilTotalExtent(array, graph) {
-         var extent = geoExtent();
-         var val, entity;
+           return actionConnect(nodeIDs)(graph);
+         };
 
-         for (var i = 0; i < array.length; i++) {
-           val = array[i];
-           entity = typeof val === 'string' ? graph.hasEntity(val) : val;
+         action.disabled = function (graph) {
+           if (nodeIDs.length < 2) return 'not_eligible';
 
-           if (entity) {
-             extent._extend(entity.extent(graph));
+           for (var i = 0; i < nodeIDs.length; i++) {
+             var entity = graph.entity(nodeIDs[i]);
+             if (entity.type !== 'node') return 'not_eligible';
            }
-         }
-
-         return extent;
-       }
-       function utilTagDiff(oldTags, newTags) {
-         var tagDiff = [];
-         var keys = utilArrayUnion(Object.keys(oldTags), Object.keys(newTags)).sort();
-         keys.forEach(function (k) {
-           var oldVal = oldTags[k];
-           var newVal = newTags[k];
 
-           if ((oldVal || oldVal === '') && (newVal === undefined || newVal !== oldVal)) {
-             tagDiff.push({
-               type: '-',
-               key: k,
-               oldVal: oldVal,
-               newVal: newVal,
-               display: '- ' + k + '=' + oldVal
-             });
-           }
+           return actionConnect(nodeIDs).disabled(graph);
+         };
 
-           if ((newVal || newVal === '') && (oldVal === undefined || newVal !== oldVal)) {
-             tagDiff.push({
-               type: '+',
-               key: k,
-               oldVal: oldVal,
-               newVal: newVal,
-               display: '+ ' + k + '=' + newVal
-             });
-           }
-         });
-         return tagDiff;
+         return action;
        }
-       function utilEntitySelector(ids) {
-         return ids.length ? '.' + ids.join(',.') : 'nothing';
-       } // returns an selector to select entity ids for:
-       //  - entityIDs passed in
-       //  - shallow descendant entityIDs for any of those entities that are relations
 
-       function utilEntityOrMemberSelector(ids, graph) {
-         var seen = new Set(ids);
-         ids.forEach(collectShallowDescendants);
-         return utilEntitySelector(Array.from(seen));
-
-         function collectShallowDescendants(id) {
-           var entity = graph.hasEntity(id);
-           if (!entity || entity.type !== 'relation') return;
-           entity.members.map(function (member) {
-             return member.id;
-           }).forEach(function (id) {
-             seen.add(id);
-           });
+       function osmChangeset() {
+         if (!(this instanceof osmChangeset)) {
+           return new osmChangeset().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
          }
-       } // returns an selector to select entity ids for:
-       //  - entityIDs passed in
-       //  - deep descendant entityIDs for any of those entities that are relations
+       }
+       osmEntity.changeset = osmChangeset;
+       osmChangeset.prototype = Object.create(osmEntity.prototype);
+       Object.assign(osmChangeset.prototype, {
+         type: 'changeset',
+         extent: function extent() {
+           return new geoExtent();
+         },
+         geometry: function geometry() {
+           return 'changeset';
+         },
+         asJXON: function asJXON() {
+           return {
+             osm: {
+               changeset: {
+                 tag: Object.keys(this.tags).map(function (k) {
+                   return {
+                     '@k': k,
+                     '@v': this.tags[k]
+                   };
+                 }, this),
+                 '@version': 0.6,
+                 '@generator': 'iD'
+               }
+             }
+           };
+         },
+         // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
+         // XML. Returns a string.
+         osmChangeJXON: function osmChangeJXON(changes) {
+           var changeset_id = this.id;
 
-       function utilEntityOrDeepMemberSelector(ids, graph) {
-         return utilEntitySelector(utilEntityAndDeepMemberIDs(ids, graph));
-       } // returns an selector to select entity ids for:
-       //  - entityIDs passed in
-       //  - deep descendant entityIDs for any of those entities that are relations
+           function nest(x, order) {
+             var groups = {};
 
-       function utilEntityAndDeepMemberIDs(ids, graph) {
-         var seen = new Set();
-         ids.forEach(collectDeepDescendants);
-         return Array.from(seen);
+             for (var i = 0; i < x.length; i++) {
+               var tagName = Object.keys(x[i])[0];
+               if (!groups[tagName]) groups[tagName] = [];
+               groups[tagName].push(x[i][tagName]);
+             }
 
-         function collectDeepDescendants(id) {
-           if (seen.has(id)) return;
-           seen.add(id);
-           var entity = graph.hasEntity(id);
-           if (!entity || entity.type !== 'relation') return;
-           entity.members.map(function (member) {
-             return member.id;
-           }).forEach(collectDeepDescendants); // recurse
-         }
-       } // returns an selector to select entity ids for:
-       //  - deep descendant entityIDs for any of those entities that are relations
+             var ordered = {};
+             order.forEach(function (o) {
+               if (groups[o]) ordered[o] = groups[o];
+             });
+             return ordered;
+           } // sort relations in a changeset by dependencies
 
-       function utilDeepMemberSelector(ids, graph, skipMultipolgonMembers) {
-         var idsSet = new Set(ids);
-         var seen = new Set();
-         var returners = new Set();
-         ids.forEach(collectDeepDescendants);
-         return utilEntitySelector(Array.from(returners));
 
-         function collectDeepDescendants(id) {
-           if (seen.has(id)) return;
-           seen.add(id);
+           function sort(changes) {
+             // find a referenced relation in the current changeset
+             function resolve(item) {
+               return relations.find(function (relation) {
+                 return item.keyAttributes.type === 'relation' && item.keyAttributes.ref === relation['@id'];
+               });
+             } // a new item is an item that has not been already processed
 
-           if (!idsSet.has(id)) {
-             returners.add(id);
-           }
 
-           var entity = graph.hasEntity(id);
-           if (!entity || entity.type !== 'relation') return;
-           if (skipMultipolgonMembers && entity.isMultipolygon()) return;
-           entity.members.map(function (member) {
-             return member.id;
-           }).forEach(collectDeepDescendants); // recurse
-         }
-       } // Adds or removes highlight styling for the specified entities
+             function isNew(item) {
+               return !sorted[item['@id']] && !processing.find(function (proc) {
+                 return proc['@id'] === item['@id'];
+               });
+             }
 
-       function utilHighlightEntities(ids, highlighted, context) {
-         context.surface().selectAll(utilEntityOrDeepMemberSelector(ids, context.graph())).classed('highlighted', highlighted);
-       } // returns an Array that is the union of:
-       //  - nodes for any nodeIDs passed in
-       //  - child nodes of any wayIDs passed in
-       //  - descendant member and child nodes of relationIDs passed in
+             var processing = [];
+             var sorted = {};
+             var relations = changes.relation;
+             if (!relations) return changes;
 
-       function utilGetAllNodes(ids, graph) {
-         var seen = new Set();
-         var nodes = new Set();
-         ids.forEach(collectNodes);
-         return Array.from(nodes);
+             for (var i = 0; i < relations.length; i++) {
+               var relation = relations[i]; // skip relation if already sorted
 
-         function collectNodes(id) {
-           if (seen.has(id)) return;
-           seen.add(id);
-           var entity = graph.hasEntity(id);
-           if (!entity) return;
+               if (!sorted[relation['@id']]) {
+                 processing.push(relation);
+               }
 
-           if (entity.type === 'node') {
-             nodes.add(entity);
-           } else if (entity.type === 'way') {
-             entity.nodes.forEach(collectNodes);
-           } else {
-             entity.members.map(function (member) {
-               return member.id;
-             }).forEach(collectNodes); // recurse
-           }
-         }
-       }
-       function utilDisplayName(entity) {
-         var localizedNameKey = 'name:' + _mainLocalizer.languageCode().toLowerCase();
-         var name = entity.tags[localizedNameKey] || entity.tags.name || '';
-         var network = entity.tags.cycle_network || entity.tags.network;
+               while (processing.length > 0) {
+                 var next = processing[0],
+                     deps = next.member.map(resolve).filter(Boolean).filter(isNew);
 
-         if (!name && entity.tags.ref) {
-           name = entity.tags.ref;
+                 if (deps.length === 0) {
+                   sorted[next['@id']] = next;
+                   processing.shift();
+                 } else {
+                   processing = deps.concat(processing);
+                 }
+               }
+             }
 
-           if (network) {
-             name = network + ' ' + name;
+             changes.relation = Object.values(sorted);
+             return changes;
            }
-         }
 
-         return name;
-       }
-       function utilDisplayNameForPath(entity) {
-         var name = utilDisplayName(entity);
-         var isFirefox = utilDetect().browser.toLowerCase().indexOf('firefox') > -1;
+           function rep(entity) {
+             return entity.asJXON(changeset_id);
+           }
 
-         if (!isFirefox && name && rtlRegex.test(name)) {
-           name = fixRTLTextForSvg(name);
+           return {
+             osmChange: {
+               '@version': 0.6,
+               '@generator': 'iD',
+               'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
+               'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
+               'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), {
+                 '@if-unused': true
+               })
+             }
+           };
+         },
+         asGeoJSON: function asGeoJSON() {
+           return {};
          }
+       });
 
-         return name;
-       }
-       function utilDisplayType(id) {
-         return {
-           n: _t('inspector.node'),
-           w: _t('inspector.way'),
-           r: _t('inspector.relation')
-         }[id.charAt(0)];
+       function osmNote() {
+         if (!(this instanceof osmNote)) {
+           return new osmNote().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }
        }
-       function utilDisplayLabel(entity, graphOrGeometry) {
-         var displayName = utilDisplayName(entity);
 
-         if (displayName) {
-           // use the display name if there is one
-           return displayName;
-         }
+       osmNote.id = function () {
+         return osmNote.id.next--;
+       };
 
-         var preset = typeof graphOrGeometry === 'string' ? _mainPresetIndex.matchTags(entity.tags, graphOrGeometry) : _mainPresetIndex.match(entity, graphOrGeometry);
+       osmNote.id.next = -1;
+       Object.assign(osmNote.prototype, {
+         type: 'note',
+         initialize: function initialize(sources) {
+           for (var i = 0; i < sources.length; ++i) {
+             var source = sources[i];
+
+             for (var prop in source) {
+               if (Object.prototype.hasOwnProperty.call(source, prop)) {
+                 if (source[prop] === undefined) {
+                   delete this[prop];
+                 } else {
+                   this[prop] = source[prop];
+                 }
+               }
+             }
+           }
 
-         if (preset && preset.name()) {
-           // use the preset name if there is a match
-           return preset.name();
-         } // fallback to the display type (node/way/relation)
+           if (!this.id) {
+             this.id = osmNote.id().toString();
+           }
 
+           return this;
+         },
+         extent: function extent() {
+           return new geoExtent(this.loc);
+         },
+         update: function update(attrs) {
+           return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
+         },
+         isNew: function isNew() {
+           return this.id < 0;
+         },
+         move: function move(loc) {
+           return this.update({
+             loc: loc
+           });
+         }
+       });
 
-         return utilDisplayType(entity.id);
+       function osmRelation() {
+         if (!(this instanceof osmRelation)) {
+           return new osmRelation().initialize(arguments);
+         } else if (arguments.length) {
+           this.initialize(arguments);
+         }
        }
-       function utilEntityRoot(entityType) {
-         return {
-           node: 'n',
-           way: 'w',
-           relation: 'r'
-         }[entityType];
-       } // Returns a single object containing the tags of all the given entities.
-       // Example:
-       // {
-       //   highway: 'service',
-       //   service: 'parking_aisle'
-       // }
-       //           +
-       // {
-       //   highway: 'service',
-       //   service: 'driveway',
-       //   width: '3'
-       // }
-       //           =
-       // {
-       //   highway: 'service',
-       //   service: [ 'driveway', 'parking_aisle' ],
-       //   width: [ '3', undefined ]
-       // }
+       osmEntity.relation = osmRelation;
+       osmRelation.prototype = Object.create(osmEntity.prototype);
 
-       function utilCombinedTags(entityIDs, graph) {
-         var tags = {};
-         var tagCounts = {};
-         var allKeys = new Set();
-         var entities = entityIDs.map(function (entityID) {
-           return graph.hasEntity(entityID);
-         }).filter(Boolean); // gather the aggregate keys
+       osmRelation.creationOrder = function (a, b) {
+         var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
+         var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
+         if (aId < 0 || bId < 0) return aId - bId;
+         return bId - aId;
+       };
 
-         entities.forEach(function (entity) {
-           var keys = Object.keys(entity.tags).filter(Boolean);
-           keys.forEach(function (key) {
-             allKeys.add(key);
+       Object.assign(osmRelation.prototype, {
+         type: 'relation',
+         members: [],
+         copy: function copy(resolver, copies) {
+           if (copies[this.id]) return copies[this.id];
+           var copy = osmEntity.prototype.copy.call(this, resolver, copies);
+           var members = this.members.map(function (member) {
+             return Object.assign({}, member, {
+               id: resolver.entity(member.id).copy(resolver, copies).id
+             });
            });
-         });
-         entities.forEach(function (entity) {
-           allKeys.forEach(function (key) {
-             var value = entity.tags[key]; // purposely allow `undefined`
+           copy = copy.update({
+             members: members
+           });
+           copies[this.id] = copy;
+           return copy;
+         },
+         extent: function extent(resolver, memo) {
+           return resolver["transient"](this, 'extent', function () {
+             if (memo && memo[this.id]) return geoExtent();
+             memo = memo || {};
+             memo[this.id] = true;
+             var extent = geoExtent();
 
-             if (!tags.hasOwnProperty(key)) {
-               // first value, set as raw
-               tags[key] = value;
-             } else {
-               if (!Array.isArray(tags[key])) {
-                 if (tags[key] !== value) {
-                   // first alternate value, replace single value with array
-                   tags[key] = [tags[key], value];
-                 }
-               } else {
-                 // type is array
-                 if (tags[key].indexOf(value) === -1) {
-                   // subsequent alternate value, add to array
-                   tags[key].push(value);
-                 }
+             for (var i = 0; i < this.members.length; i++) {
+               var member = resolver.hasEntity(this.members[i].id);
+
+               if (member) {
+                 extent._extend(member.extent(resolver, memo));
                }
              }
 
-             var tagHash = key + '=' + value;
-             if (!tagCounts[tagHash]) tagCounts[tagHash] = 0;
-             tagCounts[tagHash] += 1;
+             return extent;
            });
-         });
+         },
+         geometry: function geometry(graph) {
+           return graph["transient"](this, 'geometry', function () {
+             return this.isMultipolygon() ? 'area' : 'relation';
+           });
+         },
+         isDegenerate: function isDegenerate() {
+           return this.members.length === 0;
+         },
+         // Return an array of members, each extended with an 'index' property whose value
+         // is the member index.
+         indexedMembers: function indexedMembers() {
+           var result = new Array(this.members.length);
 
-         for (var key in tags) {
-           if (!Array.isArray(tags[key])) continue; // sort values by frequency then alphabetically
+           for (var i = 0; i < this.members.length; i++) {
+             result[i] = Object.assign({}, this.members[i], {
+               index: i
+             });
+           }
 
-           tags[key] = tags[key].sort(function (val1, val2) {
-             var key = key; // capture
+           return result;
+         },
+         // Return the first member with the given role. A copy of the member object
+         // is returned, extended with an 'index' property whose value is the member index.
+         memberByRole: function memberByRole(role) {
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].role === role) {
+               return Object.assign({}, this.members[i], {
+                 index: i
+               });
+             }
+           }
+         },
+         // Same as memberByRole, but returns all members with the given role
+         membersByRole: function membersByRole(role) {
+           var result = [];
 
-             var count2 = tagCounts[key + '=' + val2];
-             var count1 = tagCounts[key + '=' + val1];
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].role === role) {
+               result.push(Object.assign({}, this.members[i], {
+                 index: i
+               }));
+             }
+           }
 
-             if (count2 !== count1) {
-               return count2 - count1;
+           return result;
+         },
+         // Return the first member with the given id. A copy of the member object
+         // is returned, extended with an 'index' property whose value is the member index.
+         memberById: function memberById(id) {
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].id === id) {
+               return Object.assign({}, this.members[i], {
+                 index: i
+               });
+             }
+           }
+         },
+         // Return the first member with the given id and role. A copy of the member object
+         // is returned, extended with an 'index' property whose value is the member index.
+         memberByIdAndRole: function memberByIdAndRole(id, role) {
+           for (var i = 0; i < this.members.length; i++) {
+             if (this.members[i].id === id && this.members[i].role === role) {
+               return Object.assign({}, this.members[i], {
+                 index: i
+               });
              }
+           }
+         },
+         addMember: function addMember(member, index) {
+           var members = this.members.slice();
+           members.splice(index === undefined ? members.length : index, 0, member);
+           return this.update({
+             members: members
+           });
+         },
+         updateMember: function updateMember(member, index) {
+           var members = this.members.slice();
+           members.splice(index, 1, Object.assign({}, members[index], member));
+           return this.update({
+             members: members
+           });
+         },
+         removeMember: function removeMember(index) {
+           var members = this.members.slice();
+           members.splice(index, 1);
+           return this.update({
+             members: members
+           });
+         },
+         removeMembersWithID: function removeMembersWithID(id) {
+           var members = this.members.filter(function (m) {
+             return m.id !== id;
+           });
+           return this.update({
+             members: members
+           });
+         },
+         moveMember: function moveMember(fromIndex, toIndex) {
+           var members = this.members.slice();
+           members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
+           return this.update({
+             members: members
+           });
+         },
+         // Wherever a member appears with id `needle.id`, replace it with a member
+         // with id `replacement.id`, type `replacement.type`, and the original role,
+         // By default, adding a duplicate member (by id and role) is prevented.
+         // Return an updated relation.
+         replaceMember: function replaceMember(needle, replacement, keepDuplicates) {
+           if (!this.memberById(needle.id)) return this;
+           var members = [];
 
-             if (val2 && val1) {
-               return val1.localeCompare(val2);
+           for (var i = 0; i < this.members.length; i++) {
+             var member = this.members[i];
+
+             if (member.id !== needle.id) {
+               members.push(member);
+             } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
+               members.push({
+                 id: replacement.id,
+                 type: replacement.type,
+                 role: member.role
+               });
              }
+           }
 
-             return val1 ? 1 : -1;
+           return this.update({
+             members: members
            });
-         }
+         },
+         asJXON: function asJXON(changeset_id) {
+           var r = {
+             relation: {
+               '@id': this.osmId(),
+               '@version': this.version || 0,
+               member: this.members.map(function (member) {
+                 return {
+                   keyAttributes: {
+                     type: member.type,
+                     role: member.role,
+                     ref: osmEntity.id.toOSM(member.id)
+                   }
+                 };
+               }, this),
+               tag: Object.keys(this.tags).map(function (k) {
+                 return {
+                   keyAttributes: {
+                     k: k,
+                     v: this.tags[k]
+                   }
+                 };
+               }, this)
+             }
+           };
 
-         return tags;
-       }
-       function utilStringQs(str) {
-         var i = 0; // advance past any leading '?' or '#' characters
+           if (changeset_id) {
+             r.relation['@changeset'] = changeset_id;
+           }
 
-         while (i < str.length && (str[i] === '?' || str[i] === '#')) {
-           i++;
-         }
+           return r;
+         },
+         asGeoJSON: function asGeoJSON(resolver) {
+           return resolver["transient"](this, 'GeoJSON', function () {
+             if (this.isMultipolygon()) {
+               return {
+                 type: 'MultiPolygon',
+                 coordinates: this.multipolygon(resolver)
+               };
+             } else {
+               return {
+                 type: 'FeatureCollection',
+                 properties: this.tags,
+                 features: this.members.map(function (member) {
+                   return Object.assign({
+                     role: member.role
+                   }, resolver.entity(member.id).asGeoJSON(resolver));
+                 })
+               };
+             }
+           });
+         },
+         area: function area(resolver) {
+           return resolver["transient"](this, 'area', function () {
+             return d3_geoArea(this.asGeoJSON(resolver));
+           });
+         },
+         isMultipolygon: function isMultipolygon() {
+           return this.tags.type === 'multipolygon';
+         },
+         isComplete: function isComplete(resolver) {
+           for (var i = 0; i < this.members.length; i++) {
+             if (!resolver.hasEntity(this.members[i].id)) {
+               return false;
+             }
+           }
 
-         str = str.slice(i);
-         return str.split('&').reduce(function (obj, pair) {
-           var parts = pair.split('=');
+           return true;
+         },
+         hasFromViaTo: function hasFromViaTo() {
+           return this.members.some(function (m) {
+             return m.role === 'from';
+           }) && this.members.some(function (m) {
+             return m.role === 'via';
+           }) && this.members.some(function (m) {
+             return m.role === 'to';
+           });
+         },
+         isRestriction: function isRestriction() {
+           return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
+         },
+         isValidRestriction: function isValidRestriction() {
+           if (!this.isRestriction()) return false;
+           var froms = this.members.filter(function (m) {
+             return m.role === 'from';
+           });
+           var vias = this.members.filter(function (m) {
+             return m.role === 'via';
+           });
+           var tos = this.members.filter(function (m) {
+             return m.role === 'to';
+           });
+           if (froms.length !== 1 && this.tags.restriction !== 'no_entry') return false;
+           if (froms.some(function (m) {
+             return m.type !== 'way';
+           })) return false;
+           if (tos.length !== 1 && this.tags.restriction !== 'no_exit') return false;
+           if (tos.some(function (m) {
+             return m.type !== 'way';
+           })) return false;
+           if (vias.length === 0) return false;
+           if (vias.length > 1 && vias.some(function (m) {
+             return m.type !== 'way';
+           })) return false;
+           return true;
+         },
+         isConnectivity: function isConnectivity() {
+           return !!(this.tags.type && this.tags.type.match(/^connectivity:?/));
+         },
+         // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
+         // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
+         //
+         // This corresponds to the structure needed for rendering a multipolygon path using a
+         // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
+         //
+         // In the case of invalid geometries, this function will still return a result which
+         // includes the nodes of all way members, but some Nds may be unclosed and some inner
+         // rings not matched with the intended outer ring.
+         //
+         multipolygon: function multipolygon(resolver) {
+           var outers = this.members.filter(function (m) {
+             return 'outer' === (m.role || 'outer');
+           });
+           var inners = this.members.filter(function (m) {
+             return 'inner' === m.role;
+           });
+           outers = osmJoinWays(outers, resolver);
+           inners = osmJoinWays(inners, resolver);
 
-           if (parts.length === 2) {
-             obj[parts[0]] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
-           }
+           var sequenceToLineString = function sequenceToLineString(sequence) {
+             if (sequence.nodes.length > 2 && sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
+               // close unclosed parts to ensure correct area rendering - #2945
+               sequence.nodes.push(sequence.nodes[0]);
+             }
 
-           return obj;
-         }, {});
-       }
-       function utilQsString(obj, noencode) {
-         // encode everything except special characters used in certain hash parameters:
-         // "/" in map states, ":", ",", {" and "}" in background
-         function softEncode(s) {
-           return encodeURIComponent(s).replace(/(%2F|%3A|%2C|%7B|%7D)/g, decodeURIComponent);
-         }
+             return sequence.nodes.map(function (node) {
+               return node.loc;
+             });
+           };
 
-         return Object.keys(obj).sort().map(function (key) {
-           return encodeURIComponent(key) + '=' + (noencode ? softEncode(obj[key]) : encodeURIComponent(obj[key]));
-         }).join('&');
-       }
-       function utilPrefixDOMProperty(property) {
-         var prefixes = ['webkit', 'ms', 'moz', 'o'];
-         var i = -1;
-         var n = prefixes.length;
-         var s = document.body;
-         if (property in s) return property;
-         property = property.substr(0, 1).toUpperCase() + property.substr(1);
+           outers = outers.map(sequenceToLineString);
+           inners = inners.map(sequenceToLineString);
+           var result = outers.map(function (o) {
+             // Heuristic for detecting counterclockwise winding order. Assumes
+             // that OpenStreetMap polygons are not hemisphere-spanning.
+             return [d3_geoArea({
+               type: 'Polygon',
+               coordinates: [o]
+             }) > 2 * Math.PI ? o.reverse() : o];
+           });
 
-         while (++i < n) {
-           if (prefixes[i] + property in s) {
-             return prefixes[i] + property;
-           }
-         }
+           function findOuter(inner) {
+             var o, outer;
 
-         return false;
-       }
-       function utilPrefixCSSProperty(property) {
-         var prefixes = ['webkit', 'ms', 'Moz', 'O'];
-         var i = -1;
-         var n = prefixes.length;
-         var s = document.body.style;
+             for (o = 0; o < outers.length; o++) {
+               outer = outers[o];
 
-         if (property.toLowerCase() in s) {
-           return property.toLowerCase();
-         }
+               if (geoPolygonContainsPolygon(outer, inner)) {
+                 return o;
+               }
+             }
 
-         while (++i < n) {
-           if (prefixes[i] + property in s) {
-             return '-' + prefixes[i].toLowerCase() + property.replace(/([A-Z])/g, '-$1').toLowerCase();
-           }
-         }
+             for (o = 0; o < outers.length; o++) {
+               outer = outers[o];
 
-         return false;
-       }
-       var transformProperty;
-       function utilSetTransform(el, x, y, scale) {
-         var prop = transformProperty = transformProperty || utilPrefixCSSProperty('Transform');
-         var translate = utilDetect().opera ? 'translate(' + x + 'px,' + y + 'px)' : 'translate3d(' + x + 'px,' + y + 'px,0)';
-         return el.style(prop, translate + (scale ? ' scale(' + scale + ')' : ''));
-       } // Calculates Levenshtein distance between two strings
-       // see:  https://en.wikipedia.org/wiki/Levenshtein_distance
-       // first converts the strings to lowercase and replaces diacritic marks with ascii equivalents.
+               if (geoPolygonIntersectsPolygon(outer, inner, false)) {
+                 return o;
+               }
+             }
+           }
 
-       function utilEditDistance(a, b) {
-         a = remove$1(a.toLowerCase());
-         b = remove$1(b.toLowerCase());
-         if (a.length === 0) return b.length;
-         if (b.length === 0) return a.length;
-         var matrix = [];
-         var i, j;
+           for (var i = 0; i < inners.length; i++) {
+             var inner = inners[i];
 
-         for (i = 0; i <= b.length; i++) {
-           matrix[i] = [i];
-         }
+             if (d3_geoArea({
+               type: 'Polygon',
+               coordinates: [inner]
+             }) < 2 * Math.PI) {
+               inner = inner.reverse();
+             }
 
-         for (j = 0; j <= a.length; j++) {
-           matrix[0][j] = j;
-         }
+             var o = findOuter(inners[i]);
 
-         for (i = 1; i <= b.length; i++) {
-           for (j = 1; j <= a.length; j++) {
-             if (b.charAt(i - 1) === a.charAt(j - 1)) {
-               matrix[i][j] = matrix[i - 1][j - 1];
+             if (o !== undefined) {
+               result[o].push(inners[i]);
              } else {
-               matrix[i][j] = Math.min(matrix[i - 1][j - 1] + 1, // substitution
-               Math.min(matrix[i][j - 1] + 1, // insertion
-               matrix[i - 1][j] + 1)); // deletion
+               result.push([inners[i]]); // Invalid geometry
              }
            }
+
+           return result;
          }
+       });
 
-         return matrix[b.length][a.length];
-       } // a d3.mouse-alike which
-       // 1. Only works on HTML elements, not SVG
-       // 2. Does not cause style recalculation
+       var QAItem = /*#__PURE__*/function () {
+         function QAItem(loc, service, itemType, id, props) {
+           _classCallCheck$1(this, QAItem);
 
-       function utilFastMouse(container) {
-         var rect = container.getBoundingClientRect();
-         var rectLeft = rect.left;
-         var rectTop = rect.top;
-         var clientLeft = +container.clientLeft;
-         var clientTop = +container.clientTop;
-         return function (e) {
-           return [e.clientX - rectLeft - clientLeft, e.clientY - rectTop - clientTop];
-         };
-       }
-       function utilAsyncMap(inputs, func, callback) {
-         var remaining = inputs.length;
-         var results = [];
-         var errors = [];
-         inputs.forEach(function (d, i) {
-           func(d, function done(err, data) {
-             errors[i] = err;
-             results[i] = data;
-             remaining--;
-             if (!remaining) callback(errors, results);
-           });
-         });
-       } // wraps an index to an interval [0..length-1]
+           // Store required properties
+           this.loc = loc;
+           this.service = service.title;
+           this.itemType = itemType; // All issues must have an ID for selection, use generic if none specified
 
-       function utilWrap(index, length) {
-         if (index < 0) {
-           index += Math.ceil(-index / length) * length;
+           this.id = id ? id : "".concat(QAItem.id());
+           this.update(props); // Some QA services have marker icons to differentiate issues
+
+           if (service && typeof service.getIcon === 'function') {
+             this.icon = service.getIcon(itemType);
+           }
          }
 
-         return index % length;
-       }
-       /**
-        * a replacement for functor
-        *
-        * @param {*} value any value
-        * @returns {Function} a function that returns that value or the value if it's a function
-        */
+         _createClass$1(QAItem, [{
+           key: "update",
+           value: function update(props) {
+             var _this = this;
 
-       function utilFunctor(value) {
-         if (typeof value === 'function') return value;
-         return function () {
-           return value;
-         };
-       }
-       function utilNoAuto(selection) {
-         var isText = selection.size() && selection.node().tagName.toLowerCase() === 'textarea';
-         return selection // assign 'new-password' even for non-password fields to prevent browsers (Chrome) ignoring 'off'
-         .attr('autocomplete', 'new-password').attr('autocorrect', 'off').attr('autocapitalize', 'off').attr('spellcheck', isText ? 'true' : 'false');
-       } // https://stackoverflow.com/questions/194846/is-there-any-kind-of-hash-code-function-in-javascript
-       // https://werxltd.com/wp/2010/05/13/javascript-implementation-of-javas-string-hashcode-method/
+             // You can't override this initial information
+             var loc = this.loc,
+                 service = this.service,
+                 itemType = this.itemType,
+                 id = this.id;
+             Object.keys(props).forEach(function (prop) {
+               return _this[prop] = props[prop];
+             });
+             this.loc = loc;
+             this.service = service;
+             this.itemType = itemType;
+             this.id = id;
+             return this;
+           } // Generic handling for newly created QAItems
 
-       function utilHashcode(str) {
-         var hash = 0;
+         }], [{
+           key: "id",
+           value: function id() {
+             return this.nextId--;
+           }
+         }]);
 
-         if (str.length === 0) {
-           return hash;
-         }
+         return QAItem;
+       }();
+       QAItem.nextId = -1;
 
-         for (var i = 0; i < str.length; i++) {
-           var _char = str.charCodeAt(i);
+       //
+       // Optionally, split only the given ways, if multiple ways share
+       // the given node.
+       //
+       // This is the inverse of `iD.actionJoin`.
+       //
+       // For testing convenience, accepts an ID to assign to the new way.
+       // Normally, this will be undefined and the way will automatically
+       // be assigned a new ID.
+       //
+       // Reference:
+       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
+       //
 
-           hash = (hash << 5) - hash + _char;
-           hash = hash & hash; // Convert to 32bit integer
-         }
+       function actionSplit(nodeIds, newWayIds) {
+         // accept single ID for backwards-compatiblity
+         if (typeof nodeIds === 'string') nodeIds = [nodeIds];
 
-         return hash;
-       } // Returns version of `str` with all runs of special characters replaced by `_`;
-       // suitable for HTML ids, classes, selectors, etc.
+         var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
 
-       function utilSafeClassName(str) {
-         return str.toLowerCase().replace(/[^a-z0-9]+/g, '_');
-       } // Returns string based on `val` that is highly unlikely to collide with an id
-       // used previously or that's present elsewhere in the document. Useful for preventing
-       // browser-provided autofills or when embedding iD on pages with unknown elements.
 
-       function utilUniqueDomId(val) {
-         return 'ideditor-' + utilSafeClassName(val.toString()) + '-' + new Date().getTime().toString();
-       } // Returns the length of `str` in unicode characters. This can be less than
-       // `String.length()` since a single unicode character can be composed of multiple
-       // JavaScript UTF-16 code units.
+         var _keepHistoryOn = 'longest'; // 'longest', 'first'
+         // The IDs of the ways actually created by running this action
 
-       function utilUnicodeCharsCount(str) {
-         // Native ES2015 implementations of `Array.from` split strings into unicode characters
-         return Array.from(str).length;
-       } // Returns a new string representing `str` cut from its start to `limit` length
-       // in unicode characters. Note that this runs the risk of splitting graphemes.
+         var _createdWayIDs = [];
 
-       function utilUnicodeCharsTruncated(str, limit) {
-         return Array.from(str).slice(0, limit).join('');
-       }
+         function dist(graph, nA, nB) {
+           var locA = graph.entity(nA).loc;
+           var locB = graph.entity(nB).loc;
+           var epsilon = 1e-6;
+           return locA && locB ? geoSphericalDistance(locA, locB) : epsilon;
+         } // If the way is closed, we need to search for a partner node
+         // to split the way at.
+         //
+         // The following looks for a node that is both far away from
+         // the initial node in terms of way segment length and nearby
+         // in terms of beeline-distance. This assures that areas get
+         // split on the most "natural" points (independent of the number
+         // of nodes).
+         // For example: bone-shaped areas get split across their waist
+         // line, circles across the diameter.
 
-       function osmEntity(attrs) {
-         // For prototypal inheritance.
-         if (this instanceof osmEntity) return; // Create the appropriate subtype.
 
-         if (attrs && attrs.type) {
-           return osmEntity[attrs.type].apply(this, arguments);
-         } else if (attrs && attrs.id) {
-           return osmEntity[osmEntity.id.type(attrs.id)].apply(this, arguments);
-         } // Initialize a generic Entity (used only in tests).
+         function splitArea(nodes, idxA, graph) {
+           var lengths = new Array(nodes.length);
+           var length;
+           var i;
+           var best = 0;
+           var idxB;
 
+           function wrap(index) {
+             return utilWrap(index, nodes.length);
+           } // calculate lengths
 
-         return new osmEntity().initialize(arguments);
-       }
 
-       osmEntity.id = function (type) {
-         return osmEntity.id.fromOSM(type, osmEntity.id.next[type]--);
-       };
+           length = 0;
 
-       osmEntity.id.next = {
-         changeset: -1,
-         node: -1,
-         way: -1,
-         relation: -1
-       };
+           for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
+             length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
+             lengths[i] = length;
+           }
 
-       osmEntity.id.fromOSM = function (type, id) {
-         return type[0] + id;
-       };
+           length = 0;
 
-       osmEntity.id.toOSM = function (id) {
-         return id.slice(1);
-       };
+           for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
+             length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
 
-       osmEntity.id.type = function (id) {
-         return {
-           'c': 'changeset',
-           'n': 'node',
-           'w': 'way',
-           'r': 'relation'
-         }[id[0]];
-       }; // A function suitable for use as the second argument to d3.selection#data().
+             if (length < lengths[i]) {
+               lengths[i] = length;
+             }
+           } // determine best opposite node to split
 
 
-       osmEntity.key = function (entity) {
-         return entity.id + 'v' + (entity.v || 0);
-       };
+           for (i = 0; i < nodes.length; i++) {
+             var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
 
-       var _deprecatedTagValuesByKey;
+             if (cost > best) {
+               idxB = i;
+               best = cost;
+             }
+           }
 
-       osmEntity.deprecatedTagValuesByKey = function (dataDeprecated) {
-         if (!_deprecatedTagValuesByKey) {
-           _deprecatedTagValuesByKey = {};
-           dataDeprecated.forEach(function (d) {
-             var oldKeys = Object.keys(d.old);
+           return idxB;
+         }
 
-             if (oldKeys.length === 1) {
-               var oldKey = oldKeys[0];
-               var oldValue = d.old[oldKey];
+         function totalLengthBetweenNodes(graph, nodes) {
+           var totalLength = 0;
 
-               if (oldValue !== '*') {
-                 if (!_deprecatedTagValuesByKey[oldKey]) {
-                   _deprecatedTagValuesByKey[oldKey] = [oldValue];
-                 } else {
-                   _deprecatedTagValuesByKey[oldKey].push(oldValue);
-                 }
-               }
-             }
-           });
+           for (var i = 0; i < nodes.length - 1; i++) {
+             totalLength += dist(graph, nodes[i], nodes[i + 1]);
+           }
+
+           return totalLength;
          }
 
-         return _deprecatedTagValuesByKey;
-       };
+         function split(graph, nodeId, wayA, newWayId) {
+           var wayB = osmWay({
+             id: newWayId,
+             tags: wayA.tags
+           }); // `wayB` is the NEW way
 
-       osmEntity.prototype = {
-         tags: {},
-         initialize: function initialize(sources) {
-           for (var i = 0; i < sources.length; ++i) {
-             var source = sources[i];
+           var origNodes = wayA.nodes.slice();
+           var nodesA;
+           var nodesB;
+           var isArea = wayA.isArea();
+           var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
 
-             for (var prop in source) {
-               if (Object.prototype.hasOwnProperty.call(source, prop)) {
-                 if (source[prop] === undefined) {
-                   delete this[prop];
-                 } else {
-                   this[prop] = source[prop];
-                 }
-               }
+           if (wayA.isClosed()) {
+             var nodes = wayA.nodes.slice(0, -1);
+             var idxA = nodes.indexOf(nodeId);
+             var idxB = splitArea(nodes, idxA, graph);
+
+             if (idxB < idxA) {
+               nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
+               nodesB = nodes.slice(idxB, idxA + 1);
+             } else {
+               nodesA = nodes.slice(idxA, idxB + 1);
+               nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
              }
+           } else {
+             var idx = wayA.nodes.indexOf(nodeId, 1);
+             nodesA = wayA.nodes.slice(0, idx + 1);
+             nodesB = wayA.nodes.slice(idx);
            }
 
-           if (!this.id && this.type) {
-             this.id = osmEntity.id(this.type);
-           }
+           var lengthA = totalLengthBetweenNodes(graph, nodesA);
+           var lengthB = totalLengthBetweenNodes(graph, nodesB);
 
-           if (!this.hasOwnProperty('visible')) {
-             this.visible = true;
+           if (_keepHistoryOn === 'longest' && lengthB > lengthA) {
+             // keep the history on the longer way, regardless of the node count
+             wayA = wayA.update({
+               nodes: nodesB
+             });
+             wayB = wayB.update({
+               nodes: nodesA
+             });
+             var temp = lengthA;
+             lengthA = lengthB;
+             lengthB = temp;
+           } else {
+             wayA = wayA.update({
+               nodes: nodesA
+             });
+             wayB = wayB.update({
+               nodes: nodesB
+             });
            }
 
-           return this;
-         },
-         copy: function copy(resolver, copies) {
-           if (copies[this.id]) return copies[this.id];
-           var copy = osmEntity(this, {
-             id: undefined,
-             user: undefined,
-             version: undefined
-           });
-           copies[this.id] = copy;
-           return copy;
-         },
-         osmId: function osmId() {
-           return osmEntity.id.toOSM(this.id);
-         },
-         isNew: function isNew() {
-           return this.osmId() < 0;
-         },
-         update: function update(attrs) {
-           return osmEntity(this, attrs, {
-             v: 1 + (this.v || 0)
-           });
-         },
-         mergeTags: function mergeTags(tags) {
-           var merged = Object.assign({}, this.tags); // shallow copy
-
-           var changed = false;
-
-           for (var k in tags) {
-             var t1 = merged[k];
-             var t2 = tags[k];
+           if (wayA.tags.step_count) {
+             // divide up the the step count proportionally between the two ways
+             var stepCount = parseFloat(wayA.tags.step_count);
 
-             if (!t1) {
-               changed = true;
-               merged[k] = t2;
-             } else if (t1 !== t2) {
-               changed = true;
-               merged[k] = utilUnicodeCharsTruncated(utilArrayUnion(t1.split(/;\s*/), t2.split(/;\s*/)).join(';'), 255 // avoid exceeding character limit; see also services/osm.js -> maxCharsForTagValue()
-               );
+             if (stepCount && // ensure a number
+             isFinite(stepCount) && // ensure positive
+             stepCount > 0 && // ensure integer
+             Math.round(stepCount) === stepCount) {
+               var tagsA = Object.assign({}, wayA.tags);
+               var tagsB = Object.assign({}, wayB.tags);
+               var ratioA = lengthA / (lengthA + lengthB);
+               var countA = Math.round(stepCount * ratioA);
+               tagsA.step_count = countA.toString();
+               tagsB.step_count = (stepCount - countA).toString();
+               wayA = wayA.update({
+                 tags: tagsA
+               });
+               wayB = wayB.update({
+                 tags: tagsB
+               });
              }
            }
 
-           return changed ? this.update({
-             tags: merged
-           }) : this;
-         },
-         intersects: function intersects(extent, resolver) {
-           return this.extent(resolver).intersects(extent);
-         },
-         hasNonGeometryTags: function hasNonGeometryTags() {
-           return Object.keys(this.tags).some(function (k) {
-             return k !== 'area';
-           });
-         },
-         hasParentRelations: function hasParentRelations(resolver) {
-           return resolver.parentRelations(this).length > 0;
-         },
-         hasInterestingTags: function hasInterestingTags() {
-           return Object.keys(this.tags).some(osmIsInterestingTag);
-         },
-         hasWikidata: function hasWikidata() {
-           return !!this.tags.wikidata || !!this.tags['brand:wikidata'];
-         },
-         isHighwayIntersection: function isHighwayIntersection() {
-           return false;
-         },
-         isDegenerate: function isDegenerate() {
-           return true;
-         },
-         deprecatedTags: function deprecatedTags(dataDeprecated) {
-           var tags = this.tags; // if there are no tags, none can be deprecated
+           graph = graph.replace(wayA);
+           graph = graph.replace(wayB);
+           graph.parentRelations(wayA).forEach(function (relation) {
+             var member; // Turn restrictions - make sure:
+             // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
+             //    (whichever one is connected to the VIA node/ways)
+             // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
 
-           if (Object.keys(tags).length === 0) return [];
-           var deprecated = [];
-           dataDeprecated.forEach(function (d) {
-             var oldKeys = Object.keys(d.old);
+             if (relation.hasFromViaTo()) {
+               var f = relation.memberByRole('from');
+               var v = relation.membersByRole('via');
+               var t = relation.memberByRole('to');
+               var i; // 1. split a FROM/TO
 
-             if (d.replace) {
-               var hasExistingValues = Object.keys(d.replace).some(function (replaceKey) {
-                 if (!tags[replaceKey] || d.old[replaceKey]) return false;
-                 var replaceValue = d.replace[replaceKey];
-                 if (replaceValue === '*') return false;
-                 if (replaceValue === tags[replaceKey]) return false;
-                 return true;
-               }); // don't flag deprecated tags if the upgrade path would overwrite existing data - #7843
+               if (f.id === wayA.id || t.id === wayA.id) {
+                 var keepB = false;
 
-               if (hasExistingValues) return;
-             }
+                 if (v.length === 1 && v[0].type === 'node') {
+                   // check via node
+                   keepB = wayB.contains(v[0].id);
+                 } else {
+                   // check via way(s)
+                   for (i = 0; i < v.length; i++) {
+                     if (v[i].type === 'way') {
+                       var wayVia = graph.hasEntity(v[i].id);
 
-             var matchesDeprecatedTags = oldKeys.every(function (oldKey) {
-               if (!tags[oldKey]) return false;
-               if (d.old[oldKey] === '*') return true;
-               if (d.old[oldKey] === tags[oldKey]) return true;
-               var vals = tags[oldKey].split(';').filter(Boolean);
+                       if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
+                         keepB = true;
+                         break;
+                       }
+                     }
+                   }
+                 }
+
+                 if (keepB) {
+                   relation = relation.replaceMember(wayA, wayB);
+                   graph = graph.replace(relation);
+                 } // 2. split a VIA
 
-               if (vals.length === 0) {
-                 return false;
-               } else if (vals.length > 1) {
-                 return vals.indexOf(d.old[oldKey]) !== -1;
                } else {
-                 if (tags[oldKey] === d.old[oldKey]) {
-                   if (d.replace && d.old[oldKey] === d.replace[oldKey]) {
-                     var replaceKeys = Object.keys(d.replace);
-                     return !replaceKeys.every(function (replaceKey) {
-                       return tags[replaceKey] === d.replace[replaceKey];
-                     });
-                   } else {
-                     return true;
+                 for (i = 0; i < v.length; i++) {
+                   if (v[i].type === 'way' && v[i].id === wayA.id) {
+                     member = {
+                       id: wayB.id,
+                       type: 'way',
+                       role: 'via'
+                     };
+                     graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
+                     break;
                    }
                  }
+               } // All other relations (Routes, Multipolygons, etc):
+               // 1. Both `wayA` and `wayB` remain in the relation
+               // 2. But must be inserted as a pair (see `actionAddMember` for details)
+
+             } else {
+               if (relation === isOuter) {
+                 graph = graph.replace(relation.mergeTags(wayA.tags));
+                 graph = graph.replace(wayA.update({
+                   tags: {}
+                 }));
+                 graph = graph.replace(wayB.update({
+                   tags: {}
+                 }));
                }
 
-               return false;
+               member = {
+                 id: wayB.id,
+                 type: 'way',
+                 role: relation.memberById(wayA.id).role
+               };
+               var insertPair = {
+                 originalID: wayA.id,
+                 insertedID: wayB.id,
+                 nodes: origNodes
+               };
+               graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
+             }
+           });
+
+           if (!isOuter && isArea) {
+             var multipolygon = osmRelation({
+               tags: Object.assign({}, wayA.tags, {
+                 type: 'multipolygon'
+               }),
+               members: [{
+                 id: wayA.id,
+                 role: 'outer',
+                 type: 'way'
+               }, {
+                 id: wayB.id,
+                 role: 'outer',
+                 type: 'way'
+               }]
              });
+             graph = graph.replace(multipolygon);
+             graph = graph.replace(wayA.update({
+               tags: {}
+             }));
+             graph = graph.replace(wayB.update({
+               tags: {}
+             }));
+           }
 
-             if (matchesDeprecatedTags) {
-               deprecated.push(d);
-             }
-           });
-           return deprecated;
+           _createdWayIDs.push(wayB.id);
+
+           return graph;
          }
-       };
 
-       function osmLanes(entity) {
-         if (entity.type !== 'way') return null;
-         if (!entity.tags.highway) return null;
-         var tags = entity.tags;
-         var isOneWay = entity.isOneWay();
-         var laneCount = getLaneCount(tags, isOneWay);
-         var maxspeed = parseMaxspeed(tags);
-         var laneDirections = parseLaneDirections(tags, isOneWay, laneCount);
-         var forward = laneDirections.forward;
-         var backward = laneDirections.backward;
-         var bothways = laneDirections.bothways; // parse the piped string 'x|y|z' format
+         var action = function action(graph) {
+           _createdWayIDs = [];
+           var newWayIndex = 0;
 
-         var turnLanes = {};
-         turnLanes.unspecified = parseTurnLanes(tags['turn:lanes']);
-         turnLanes.forward = parseTurnLanes(tags['turn:lanes:forward']);
-         turnLanes.backward = parseTurnLanes(tags['turn:lanes:backward']);
-         var maxspeedLanes = {};
-         maxspeedLanes.unspecified = parseMaxspeedLanes(tags['maxspeed:lanes'], maxspeed);
-         maxspeedLanes.forward = parseMaxspeedLanes(tags['maxspeed:lanes:forward'], maxspeed);
-         maxspeedLanes.backward = parseMaxspeedLanes(tags['maxspeed:lanes:backward'], maxspeed);
-         var psvLanes = {};
-         psvLanes.unspecified = parseMiscLanes(tags['psv:lanes']);
-         psvLanes.forward = parseMiscLanes(tags['psv:lanes:forward']);
-         psvLanes.backward = parseMiscLanes(tags['psv:lanes:backward']);
-         var busLanes = {};
-         busLanes.unspecified = parseMiscLanes(tags['bus:lanes']);
-         busLanes.forward = parseMiscLanes(tags['bus:lanes:forward']);
-         busLanes.backward = parseMiscLanes(tags['bus:lanes:backward']);
-         var taxiLanes = {};
-         taxiLanes.unspecified = parseMiscLanes(tags['taxi:lanes']);
-         taxiLanes.forward = parseMiscLanes(tags['taxi:lanes:forward']);
-         taxiLanes.backward = parseMiscLanes(tags['taxi:lanes:backward']);
-         var hovLanes = {};
-         hovLanes.unspecified = parseMiscLanes(tags['hov:lanes']);
-         hovLanes.forward = parseMiscLanes(tags['hov:lanes:forward']);
-         hovLanes.backward = parseMiscLanes(tags['hov:lanes:backward']);
-         var hgvLanes = {};
-         hgvLanes.unspecified = parseMiscLanes(tags['hgv:lanes']);
-         hgvLanes.forward = parseMiscLanes(tags['hgv:lanes:forward']);
-         hgvLanes.backward = parseMiscLanes(tags['hgv:lanes:backward']);
-         var bicyclewayLanes = {};
-         bicyclewayLanes.unspecified = parseBicycleWay(tags['bicycleway:lanes']);
-         bicyclewayLanes.forward = parseBicycleWay(tags['bicycleway:lanes:forward']);
-         bicyclewayLanes.backward = parseBicycleWay(tags['bicycleway:lanes:backward']);
-         var lanesObj = {
-           forward: [],
-           backward: [],
-           unspecified: []
-         }; // map forward/backward/unspecified of each lane type to lanesObj
+           for (var i = 0; i < nodeIds.length; i++) {
+             var nodeId = nodeIds[i];
+             var candidates = action.waysForNode(nodeId, graph);
 
-         mapToLanesObj(lanesObj, turnLanes, 'turnLane');
-         mapToLanesObj(lanesObj, maxspeedLanes, 'maxspeed');
-         mapToLanesObj(lanesObj, psvLanes, 'psv');
-         mapToLanesObj(lanesObj, busLanes, 'bus');
-         mapToLanesObj(lanesObj, taxiLanes, 'taxi');
-         mapToLanesObj(lanesObj, hovLanes, 'hov');
-         mapToLanesObj(lanesObj, hgvLanes, 'hgv');
-         mapToLanesObj(lanesObj, bicyclewayLanes, 'bicycleway');
-         return {
-           metadata: {
-             count: laneCount,
-             oneway: isOneWay,
-             forward: forward,
-             backward: backward,
-             bothways: bothways,
-             turnLanes: turnLanes,
-             maxspeed: maxspeed,
-             maxspeedLanes: maxspeedLanes,
-             psvLanes: psvLanes,
-             busLanes: busLanes,
-             taxiLanes: taxiLanes,
-             hovLanes: hovLanes,
-             hgvLanes: hgvLanes,
-             bicyclewayLanes: bicyclewayLanes
-           },
-           lanes: lanesObj
+             for (var j = 0; j < candidates.length; j++) {
+               graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
+               newWayIndex += 1;
+             }
+           }
+
+           return graph;
          };
-       }
 
-       function getLaneCount(tags, isOneWay) {
-         var count;
+         action.getCreatedWayIDs = function () {
+           return _createdWayIDs;
+         };
 
-         if (tags.lanes) {
-           count = parseInt(tags.lanes, 10);
+         action.waysForNode = function (nodeId, graph) {
+           var node = graph.entity(nodeId);
+           var splittableParents = graph.parentWays(node).filter(isSplittable);
 
-           if (count > 0) {
-             return count;
-           }
-         }
+           if (!_wayIDs) {
+             // If the ways to split aren't specified, only split the lines.
+             // If there are no lines to split, split the areas.
+             var hasLine = splittableParents.some(function (parent) {
+               return parent.geometry(graph) === 'line';
+             });
 
-         switch (tags.highway) {
-           case 'trunk':
-           case 'motorway':
-             count = isOneWay ? 2 : 4;
-             break;
+             if (hasLine) {
+               return splittableParents.filter(function (parent) {
+                 return parent.geometry(graph) === 'line';
+               });
+             }
+           }
 
-           default:
-             count = isOneWay ? 1 : 2;
-             break;
-         }
+           return splittableParents;
 
-         return count;
-       }
+           function isSplittable(parent) {
+             // If the ways to split are specified, ignore everything else.
+             if (_wayIDs && _wayIDs.indexOf(parent.id) === -1) return false; // We can fake splitting closed ways at their endpoints...
 
-       function parseMaxspeed(tags) {
-         var maxspeed = tags.maxspeed;
-         if (!maxspeed) return;
-         var maxspeedRegex = /^([0-9][\.0-9]+?)(?:[ ]?(?:km\/h|kmh|kph|mph|knots))?$/;
-         if (!maxspeedRegex.test(maxspeed)) return;
-         return parseInt(maxspeed, 10);
-       }
+             if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
 
-       function parseLaneDirections(tags, isOneWay, laneCount) {
-         var forward = parseInt(tags['lanes:forward'], 10);
-         var backward = parseInt(tags['lanes:backward'], 10);
-         var bothways = parseInt(tags['lanes:both_ways'], 10) > 0 ? 1 : 0;
+             for (var i = 1; i < parent.nodes.length - 1; i++) {
+               if (parent.nodes[i] === nodeId) return true;
+             }
 
-         if (parseInt(tags.oneway, 10) === -1) {
-           forward = 0;
-           bothways = 0;
-           backward = laneCount;
-         } else if (isOneWay) {
-           forward = laneCount;
-           bothways = 0;
-           backward = 0;
-         } else if (isNaN(forward) && isNaN(backward)) {
-           backward = Math.floor((laneCount - bothways) / 2);
-           forward = laneCount - bothways - backward;
-         } else if (isNaN(forward)) {
-           if (backward > laneCount - bothways) {
-             backward = laneCount - bothways;
+             return false;
            }
+         };
 
-           forward = laneCount - bothways - backward;
-         } else if (isNaN(backward)) {
-           if (forward > laneCount - bothways) {
-             forward = laneCount - bothways;
+         action.ways = function (graph) {
+           return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
+             return action.waysForNode(nodeId, graph);
+           })));
+         };
+
+         action.disabled = function (graph) {
+           for (var i = 0; i < nodeIds.length; i++) {
+             var nodeId = nodeIds[i];
+             var candidates = action.waysForNode(nodeId, graph);
+
+             if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
+               return 'not_eligible';
+             }
            }
+         };
 
-           backward = laneCount - bothways - forward;
-         }
+         action.limitWays = function (val) {
+           if (!arguments.length) return _wayIDs;
+           _wayIDs = val;
+           return action;
+         };
 
-         return {
-           forward: forward,
-           backward: backward,
-           bothways: bothways
+         action.keepHistoryOn = function (val) {
+           if (!arguments.length) return _keepHistoryOn;
+           _keepHistoryOn = val;
+           return action;
          };
-       }
 
-       function parseTurnLanes(tag) {
-         if (!tag) return;
-         var validValues = ['left', 'slight_left', 'sharp_left', 'through', 'right', 'slight_right', 'sharp_right', 'reverse', 'merge_to_left', 'merge_to_right', 'none'];
-         return tag.split('|').map(function (s) {
-           if (s === '') s = 'none';
-           return s.split(';').map(function (d) {
-             return validValues.indexOf(d) === -1 ? 'unknown' : d;
-           });
-         });
+         return action;
        }
 
-       function parseMaxspeedLanes(tag, maxspeed) {
-         if (!tag) return;
-         return tag.split('|').map(function (s) {
-           if (s === 'none') return s;
-           var m = parseInt(s, 10);
-           if (s === '' || m === maxspeed) return null;
-           return isNaN(m) ? 'unknown' : m;
-         });
-       }
+       function coreGraph(other, mutable) {
+         if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
 
-       function parseMiscLanes(tag) {
-         if (!tag) return;
-         var validValues = ['yes', 'no', 'designated'];
-         return tag.split('|').map(function (s) {
-           if (s === '') s = 'no';
-           return validValues.indexOf(s) === -1 ? 'unknown' : s;
-         });
-       }
+         if (other instanceof coreGraph) {
+           var base = other.base();
+           this.entities = Object.assign(Object.create(base.entities), other.entities);
+           this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
+           this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
+         } else {
+           this.entities = Object.create({});
+           this._parentWays = Object.create({});
+           this._parentRels = Object.create({});
+           this.rebase(other || [], [this]);
+         }
 
-       function parseBicycleWay(tag) {
-         if (!tag) return;
-         var validValues = ['yes', 'no', 'designated', 'lane'];
-         return tag.split('|').map(function (s) {
-           if (s === '') s = 'no';
-           return validValues.indexOf(s) === -1 ? 'unknown' : s;
-         });
+         this.transients = {};
+         this._childNodes = {};
+         this.frozen = !mutable;
        }
+       coreGraph.prototype = {
+         hasEntity: function hasEntity(id) {
+           return this.entities[id];
+         },
+         entity: function entity(id) {
+           var entity = this.entities[id]; //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
 
-       function mapToLanesObj(lanesObj, data, key) {
-         if (data.forward) data.forward.forEach(function (l, i) {
-           if (!lanesObj.forward[i]) lanesObj.forward[i] = {};
-           lanesObj.forward[i][key] = l;
-         });
-         if (data.backward) data.backward.forEach(function (l, i) {
-           if (!lanesObj.backward[i]) lanesObj.backward[i] = {};
-           lanesObj.backward[i][key] = l;
-         });
-         if (data.unspecified) data.unspecified.forEach(function (l, i) {
-           if (!lanesObj.unspecified[i]) lanesObj.unspecified[i] = {};
-           lanesObj.unspecified[i][key] = l;
-         });
-       }
+           if (!entity) {
+             entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
+           }
 
-       function osmWay() {
-         if (!(this instanceof osmWay)) {
-           return new osmWay().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
-         }
-       }
-       osmEntity.way = osmWay;
-       osmWay.prototype = Object.create(osmEntity.prototype);
-       Object.assign(osmWay.prototype, {
-         type: 'way',
-         nodes: [],
-         copy: function copy(resolver, copies) {
-           if (copies[this.id]) return copies[this.id];
-           var copy = osmEntity.prototype.copy.call(this, resolver, copies);
-           var nodes = this.nodes.map(function (id) {
-             return resolver.entity(id).copy(resolver, copies).id;
-           });
-           copy = copy.update({
-             nodes: nodes
-           });
-           copies[this.id] = copy;
-           return copy;
+           if (!entity) {
+             throw new Error('entity ' + id + ' not found');
+           }
+
+           return entity;
          },
-         extent: function extent(resolver) {
-           return resolver["transient"](this, 'extent', function () {
-             var extent = geoExtent();
+         geometry: function geometry(id) {
+           return this.entity(id).geometry(this);
+         },
+         "transient": function transient(entity, key, fn) {
+           var id = entity.id;
+           var transients = this.transients[id] || (this.transients[id] = {});
 
-             for (var i = 0; i < this.nodes.length; i++) {
-               var node = resolver.hasEntity(this.nodes[i]);
+           if (transients[key] !== undefined) {
+             return transients[key];
+           }
 
-               if (node) {
-                 extent._extend(node.extent());
-               }
-             }
+           transients[key] = fn.call(entity);
+           return transients[key];
+         },
+         parentWays: function parentWays(entity) {
+           var parents = this._parentWays[entity.id];
+           var result = [];
 
-             return extent;
-           });
+           if (parents) {
+             parents.forEach(function (id) {
+               result.push(this.entity(id));
+             }, this);
+           }
+
+           return result;
          },
-         first: function first() {
-           return this.nodes[0];
+         isPoi: function isPoi(entity) {
+           var parents = this._parentWays[entity.id];
+           return !parents || parents.size === 0;
          },
-         last: function last() {
-           return this.nodes[this.nodes.length - 1];
+         isShared: function isShared(entity) {
+           var parents = this._parentWays[entity.id];
+           return parents && parents.size > 1;
          },
-         contains: function contains(node) {
-           return this.nodes.indexOf(node) >= 0;
+         parentRelations: function parentRelations(entity) {
+           var parents = this._parentRels[entity.id];
+           var result = [];
+
+           if (parents) {
+             parents.forEach(function (id) {
+               result.push(this.entity(id));
+             }, this);
+           }
+
+           return result;
          },
-         affix: function affix(node) {
-           if (this.nodes[0] === node) return 'prefix';
-           if (this.nodes[this.nodes.length - 1] === node) return 'suffix';
+         parentMultipolygons: function parentMultipolygons(entity) {
+           return this.parentRelations(entity).filter(function (relation) {
+             return relation.isMultipolygon();
+           });
          },
-         layer: function layer() {
-           // explicit layer tag, clamp between -10, 10..
-           if (isFinite(this.tags.layer)) {
-             return Math.max(-10, Math.min(+this.tags.layer, 10));
-           } // implied layer tag..
+         childNodes: function childNodes(entity) {
+           if (this._childNodes[entity.id]) return this._childNodes[entity.id];
+           if (!entity.nodes) return [];
+           var nodes = [];
 
+           for (var i = 0; i < entity.nodes.length; i++) {
+             nodes[i] = this.entity(entity.nodes[i]);
+           }
+           this._childNodes[entity.id] = nodes;
+           return this._childNodes[entity.id];
+         },
+         base: function base() {
+           return {
+             'entities': Object.getPrototypeOf(this.entities),
+             'parentWays': Object.getPrototypeOf(this._parentWays),
+             'parentRels': Object.getPrototypeOf(this._parentRels)
+           };
+         },
+         // Unlike other graph methods, rebase mutates in place. This is because it
+         // is used only during the history operation that merges newly downloaded
+         // data into each state. To external consumers, it should appear as if the
+         // graph always contained the newly downloaded data.
+         rebase: function rebase(entities, stack, force) {
+           var base = this.base();
+           var i, j, k, id;
 
-           if (this.tags.covered === 'yes') return -1;
-           if (this.tags.location === 'overground') return 1;
-           if (this.tags.location === 'underground') return -1;
-           if (this.tags.location === 'underwater') return -10;
-           if (this.tags.power === 'line') return 10;
-           if (this.tags.power === 'minor_line') return 10;
-           if (this.tags.aerialway) return 10;
-           if (this.tags.bridge) return 1;
-           if (this.tags.cutting) return -1;
-           if (this.tags.tunnel) return -1;
-           if (this.tags.waterway) return -1;
-           if (this.tags.man_made === 'pipeline') return -10;
-           if (this.tags.boundary) return -10;
-           return 0;
+           for (i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (!entity.visible || !force && base.entities[entity.id]) continue; // Merging data into the base graph
+
+             base.entities[entity.id] = entity;
+
+             this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
+
+
+             if (entity.type === 'way') {
+               for (j = 0; j < entity.nodes.length; j++) {
+                 id = entity.nodes[j];
+
+                 for (k = 1; k < stack.length; k++) {
+                   var ents = stack[k].entities;
+
+                   if (ents.hasOwnProperty(id) && ents[id] === undefined) {
+                     delete ents[id];
+                   }
+                 }
+               }
+             }
+           }
+
+           for (i = 0; i < stack.length; i++) {
+             stack[i]._updateRebased();
+           }
          },
-         // the approximate width of the line based on its tags except its `width` tag
-         impliedLineWidthMeters: function impliedLineWidthMeters() {
-           var averageWidths = {
-             highway: {
-               // width is for single lane
-               motorway: 5,
-               motorway_link: 5,
-               trunk: 4.5,
-               trunk_link: 4.5,
-               primary: 4,
-               secondary: 4,
-               tertiary: 4,
-               primary_link: 4,
-               secondary_link: 4,
-               tertiary_link: 4,
-               unclassified: 4,
-               road: 4,
-               living_street: 4,
-               bus_guideway: 4,
-               pedestrian: 4,
-               residential: 3.5,
-               service: 3.5,
-               track: 3,
-               cycleway: 2.5,
-               bridleway: 2,
-               corridor: 2,
-               steps: 2,
-               path: 1.5,
-               footway: 1.5
-             },
-             railway: {
-               // width includes ties and rail bed, not just track gauge
-               rail: 2.5,
-               light_rail: 2.5,
-               tram: 2.5,
-               subway: 2.5,
-               monorail: 2.5,
-               funicular: 2.5,
-               disused: 2.5,
-               preserved: 2.5,
-               miniature: 1.5,
-               narrow_gauge: 1.5
-             },
-             waterway: {
-               river: 50,
-               canal: 25,
-               stream: 5,
-               tidal_channel: 5,
-               fish_pass: 2.5,
-               drain: 2.5,
-               ditch: 1.5
+         _updateRebased: function _updateRebased() {
+           var base = this.base();
+           Object.keys(this._parentWays).forEach(function (child) {
+             if (base.parentWays[child]) {
+               base.parentWays[child].forEach(function (id) {
+                 if (!this.entities.hasOwnProperty(id)) {
+                   this._parentWays[child].add(id);
+                 }
+               }, this);
+             }
+           }, this);
+           Object.keys(this._parentRels).forEach(function (child) {
+             if (base.parentRels[child]) {
+               base.parentRels[child].forEach(function (id) {
+                 if (!this.entities.hasOwnProperty(id)) {
+                   this._parentRels[child].add(id);
+                 }
+               }, this);
              }
-           };
+           }, this);
+           this.transients = {}; // this._childNodes is not updated, under the assumption that
+           // ways are always downloaded with their child nodes.
+         },
+         // Updates calculated properties (parentWays, parentRels) for the specified change
+         _updateCalculated: function _updateCalculated(oldentity, entity, parentWays, parentRels) {
+           parentWays = parentWays || this._parentWays;
+           parentRels = parentRels || this._parentRels;
+           var type = entity && entity.type || oldentity && oldentity.type;
+           var removed, added, i;
 
-           for (var key in averageWidths) {
-             if (this.tags[key] && averageWidths[key][this.tags[key]]) {
-               var width = averageWidths[key][this.tags[key]];
+           if (type === 'way') {
+             // Update parentWays
+             if (oldentity && entity) {
+               removed = utilArrayDifference(oldentity.nodes, entity.nodes);
+               added = utilArrayDifference(entity.nodes, oldentity.nodes);
+             } else if (oldentity) {
+               removed = oldentity.nodes;
+               added = [];
+             } else if (entity) {
+               removed = [];
+               added = entity.nodes;
+             }
 
-               if (key === 'highway') {
-                 var laneCount = this.tags.lanes && parseInt(this.tags.lanes, 10);
-                 if (!laneCount) laneCount = this.isOneWay() ? 1 : 2;
-                 return width * laneCount;
-               }
+             for (i = 0; i < removed.length; i++) {
+               // make a copy of prototype property, store as own property, and update..
+               parentWays[removed[i]] = new Set(parentWays[removed[i]]);
+               parentWays[removed[i]]["delete"](oldentity.id);
+             }
 
-               return width;
+             for (i = 0; i < added.length; i++) {
+               // make a copy of prototype property, store as own property, and update..
+               parentWays[added[i]] = new Set(parentWays[added[i]]);
+               parentWays[added[i]].add(entity.id);
+             }
+           } else if (type === 'relation') {
+             // Update parentRels
+             // diff only on the IDs since the same entity can be a member multiple times with different roles
+             var oldentityMemberIDs = oldentity ? oldentity.members.map(function (m) {
+               return m.id;
+             }) : [];
+             var entityMemberIDs = entity ? entity.members.map(function (m) {
+               return m.id;
+             }) : [];
+
+             if (oldentity && entity) {
+               removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
+               added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
+             } else if (oldentity) {
+               removed = oldentityMemberIDs;
+               added = [];
+             } else if (entity) {
+               removed = [];
+               added = entityMemberIDs;
+             }
+
+             for (i = 0; i < removed.length; i++) {
+               // make a copy of prototype property, store as own property, and update..
+               parentRels[removed[i]] = new Set(parentRels[removed[i]]);
+               parentRels[removed[i]]["delete"](oldentity.id);
+             }
+
+             for (i = 0; i < added.length; i++) {
+               // make a copy of prototype property, store as own property, and update..
+               parentRels[added[i]] = new Set(parentRels[added[i]]);
+               parentRels[added[i]].add(entity.id);
              }
            }
+         },
+         replace: function replace(entity) {
+           if (this.entities[entity.id] === entity) return this;
+           return this.update(function () {
+             this._updateCalculated(this.entities[entity.id], entity);
 
-           return null;
+             this.entities[entity.id] = entity;
+           });
          },
-         isOneWay: function isOneWay() {
-           // explicit oneway tag..
-           var values = {
-             'yes': true,
-             '1': true,
-             '-1': true,
-             'reversible': true,
-             'alternating': true,
-             'no': false,
-             '0': false
-           };
+         remove: function remove(entity) {
+           return this.update(function () {
+             this._updateCalculated(entity, undefined);
 
-           if (values[this.tags.oneway] !== undefined) {
-             return values[this.tags.oneway];
-           } // implied oneway tag..
+             this.entities[entity.id] = undefined;
+           });
+         },
+         revert: function revert(id) {
+           var baseEntity = this.base().entities[id];
+           var headEntity = this.entities[id];
+           if (headEntity === baseEntity) return this;
+           return this.update(function () {
+             this._updateCalculated(headEntity, baseEntity);
 
+             delete this.entities[id];
+           });
+         },
+         update: function update() {
+           var graph = this.frozen ? coreGraph(this, true) : this;
 
-           for (var key in this.tags) {
-             if (key in osmOneWayTags && this.tags[key] in osmOneWayTags[key]) return true;
+           for (var i = 0; i < arguments.length; i++) {
+             arguments[i].call(graph, graph);
            }
 
-           return false;
+           if (this.frozen) graph.frozen = true;
+           return graph;
          },
-         // Some identifier for tag that implies that this way is "sided",
-         // i.e. the right side is the 'inside' (e.g. the right side of a
-         // natural=cliff is lower).
-         sidednessIdentifier: function sidednessIdentifier() {
-           for (var key in this.tags) {
-             var value = this.tags[key];
+         // Obliterates any existing entities
+         load: function load(entities) {
+           var base = this.base();
+           this.entities = Object.create(base.entities);
 
-             if (key in osmRightSideIsInsideTags && value in osmRightSideIsInsideTags[key]) {
-               if (osmRightSideIsInsideTags[key][value] === true) {
-                 return key;
-               } else {
-                 // if the map's value is something other than a
-                 // literal true, we should use it so we can
-                 // special case some keys (e.g. natural=coastline
-                 // is handled differently to other naturals).
-                 return osmRightSideIsInsideTags[key][value];
-               }
-             }
-           }
+           for (var i in entities) {
+             this.entities[i] = entities[i];
 
-           return null;
-         },
-         isSided: function isSided() {
-           if (this.tags.two_sided === 'yes') {
-             return false;
+             this._updateCalculated(base.entities[i], this.entities[i]);
            }
 
-           return this.sidednessIdentifier() !== null;
-         },
-         lanes: function lanes() {
-           return osmLanes(this);
-         },
-         isClosed: function isClosed() {
-           return this.nodes.length > 1 && this.first() === this.last();
-         },
-         isConvex: function isConvex(resolver) {
-           if (!this.isClosed() || this.isDegenerate()) return null;
-           var nodes = utilArrayUniq(resolver.childNodes(this));
-           var coords = nodes.map(function (n) {
-             return n.loc;
+           return this;
+         }
+       };
+
+       function osmTurn(turn) {
+         if (!(this instanceof osmTurn)) {
+           return new osmTurn(turn);
+         }
+
+         Object.assign(this, turn);
+       }
+       function osmIntersection(graph, startVertexId, maxDistance) {
+         maxDistance = maxDistance || 30; // in meters
+
+         var vgraph = coreGraph(); // virtual graph
+
+         var i, j, k;
+
+         function memberOfRestriction(entity) {
+           return graph.parentRelations(entity).some(function (r) {
+             return r.isRestriction();
            });
-           var curr = 0;
-           var prev = 0;
+         }
 
-           for (var i = 0; i < coords.length; i++) {
-             var o = coords[(i + 1) % coords.length];
-             var a = coords[i];
-             var b = coords[(i + 2) % coords.length];
-             var res = geoVecCross(a, b, o);
-             curr = res > 0 ? 1 : res < 0 ? -1 : 0;
+         function isRoad(way) {
+           if (way.isArea() || way.isDegenerate()) return false;
+           var roads = {
+             'motorway': true,
+             'motorway_link': true,
+             'trunk': true,
+             'trunk_link': true,
+             'primary': true,
+             'primary_link': true,
+             'secondary': true,
+             'secondary_link': true,
+             'tertiary': true,
+             'tertiary_link': true,
+             'residential': true,
+             'unclassified': true,
+             'living_street': true,
+             'service': true,
+             'road': true,
+             'track': true
+           };
+           return roads[way.tags.highway];
+         }
 
-             if (curr === 0) {
-               continue;
-             } else if (prev && curr !== prev) {
-               return false;
-             }
+         var startNode = graph.entity(startVertexId);
+         var checkVertices = [startNode];
+         var checkWays;
+         var vertices = [];
+         var vertexIds = [];
+         var vertex;
+         var ways = [];
+         var wayIds = [];
+         var way;
+         var nodes = [];
+         var node;
+         var parents = [];
+         var parent; // `actions` will store whatever actions must be performed to satisfy
+         // preconditions for adding a turn restriction to this intersection.
+         //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
+         //  - Reverse oneways so that they are drawn in the forward direction
+         //  - Split ways on key vertices
 
-             prev = curr;
-           }
+         var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
+         //  for more key vertices and ways to include in the intersection..
 
-           return true;
-         },
-         // returns an object with the tag that implies this is an area, if any
-         tagSuggestingArea: function tagSuggestingArea() {
-           return osmTagSuggestingArea(this.tags);
-         },
-         isArea: function isArea() {
-           if (this.tags.area === 'yes') return true;
-           if (!this.isClosed() || this.tags.area === 'no') return false;
-           return this.tagSuggestingArea() !== null;
-         },
-         isDegenerate: function isDegenerate() {
-           return new Set(this.nodes).size < (this.isArea() ? 3 : 2);
-         },
-         areAdjacent: function areAdjacent(n1, n2) {
-           for (var i = 0; i < this.nodes.length; i++) {
-             if (this.nodes[i] === n1) {
-               if (this.nodes[i - 1] === n2) return true;
-               if (this.nodes[i + 1] === n2) return true;
+         while (checkVertices.length) {
+           vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
+
+           checkWays = graph.parentWays(vertex);
+           var hasWays = false;
+
+           for (i = 0; i < checkWays.length; i++) {
+             way = checkWays[i];
+             if (!isRoad(way) && !memberOfRestriction(way)) continue;
+             ways.push(way); // it's a road, or it's already in a turn restriction
+
+             hasWays = true; // check the way's children for more key vertices
+
+             nodes = utilArrayUniq(graph.childNodes(way));
+
+             for (j = 0; j < nodes.length; j++) {
+               node = nodes[j];
+               if (node === vertex) continue; // same thing
+
+               if (vertices.indexOf(node) !== -1) continue; // seen it already
+
+               if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
+               // a key vertex will have parents that are also roads
+
+               var hasParents = false;
+               parents = graph.parentWays(node);
+
+               for (k = 0; k < parents.length; k++) {
+                 parent = parents[k];
+                 if (parent === way) continue; // same thing
+
+                 if (ways.indexOf(parent) !== -1) continue; // seen it already
+
+                 if (!isRoad(parent)) continue; // not a road
+
+                 hasParents = true;
+                 break;
+               }
+
+               if (hasParents) {
+                 checkVertices.push(node);
+               }
              }
            }
 
-           return false;
-         },
-         geometry: function geometry(graph) {
-           return graph["transient"](this, 'geometry', function () {
-             return this.isArea() ? 'area' : 'line';
-           });
-         },
-         // returns an array of objects representing the segments between the nodes in this way
-         segments: function segments(graph) {
-           function segmentExtent(graph) {
-             var n1 = graph.hasEntity(this.nodes[0]);
-             var n2 = graph.hasEntity(this.nodes[1]);
-             return n1 && n2 && geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]);
+           if (hasWays) {
+             vertices.push(vertex);
            }
+         }
 
-           return graph["transient"](this, 'segments', function () {
-             var segments = [];
-
-             for (var i = 0; i < this.nodes.length - 1; i++) {
-               segments.push({
-                 id: this.id + '-' + i,
-                 wayId: this.id,
-                 index: i,
-                 nodes: [this.nodes[i], this.nodes[i + 1]],
-                 extent: segmentExtent
-               });
-             }
+         vertices = utilArrayUniq(vertices);
+         ways = utilArrayUniq(ways); // STEP 2:  Build a virtual graph containing only the entities in the intersection..
+         // Everything done after this step should act on the virtual graph
+         // Any actions that must be performed later to the main graph go in `actions` array
 
-             return segments;
+         ways.forEach(function (way) {
+           graph.childNodes(way).forEach(function (node) {
+             vgraph = vgraph.replace(node);
            });
-         },
-         // If this way is not closed, append the beginning node to the end of the nodelist to close it.
-         close: function close() {
-           if (this.isClosed() || !this.nodes.length) return this;
-           var nodes = this.nodes.slice();
-           nodes = nodes.filter(noRepeatNodes);
-           nodes.push(nodes[0]);
-           return this.update({
-             nodes: nodes
+           vgraph = vgraph.replace(way);
+           graph.parentRelations(way).forEach(function (relation) {
+             if (relation.isRestriction()) {
+               if (relation.isValidRestriction(graph)) {
+                 vgraph = vgraph.replace(relation);
+               } else if (relation.isComplete(graph)) {
+                 actions.push(actionDeleteRelation(relation.id));
+               }
+             }
            });
-         },
-         // If this way is closed, remove any connector nodes from the end of the nodelist to unclose it.
-         unclose: function unclose() {
-           if (!this.isClosed()) return this;
-           var nodes = this.nodes.slice();
-           var connector = this.first();
-           var i = nodes.length - 1; // remove trailing connectors..
+         }); // STEP 3:  Force all oneways to be drawn in the forward direction
 
-           while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-             nodes.splice(i, 1);
-             i = nodes.length - 1;
+         ways.forEach(function (w) {
+           var way = vgraph.entity(w.id);
+
+           if (way.tags.oneway === '-1') {
+             var action = actionReverse(way.id, {
+               reverseOneway: true
+             });
+             actions.push(action);
+             vgraph = action(vgraph);
            }
+         }); // STEP 4:  Split ways on key vertices
 
-           nodes = nodes.filter(noRepeatNodes);
-           return this.update({
-             nodes: nodes
-           });
-         },
-         // Adds a node (id) in front of the node which is currently at position index.
-         // If index is undefined, the node will be added to the end of the way for linear ways,
-         //   or just before the final connecting node for circular ways.
-         // Consecutive duplicates are eliminated including existing ones.
-         // Circularity is always preserved when adding a node.
-         addNode: function addNode(id, index) {
-           var nodes = this.nodes.slice();
-           var isClosed = this.isClosed();
-           var max = isClosed ? nodes.length - 1 : nodes.length;
+         var origCount = osmEntity.id.next.way;
+         vertices.forEach(function (v) {
+           // This is an odd way to do it, but we need to find all the ways that
+           // will be split here, then split them one at a time to ensure that these
+           // actions can be replayed on the main graph exactly in the same order.
+           // (It is unintuitive, but the order of ways returned from graph.parentWays()
+           // is arbitrary, depending on how the main graph and vgraph were built)
+           var splitAll = actionSplit([v.id]).keepHistoryOn('first');
 
-           if (index === undefined) {
-             index = max;
+           if (!splitAll.disabled(vgraph)) {
+             splitAll.ways(vgraph).forEach(function (way) {
+               var splitOne = actionSplit([v.id]).limitWays([way.id]).keepHistoryOn('first');
+               actions.push(splitOne);
+               vgraph = splitOne(vgraph);
+             });
            }
+         }); // In here is where we should also split the intersection at nearby junction.
+         //   for https://github.com/mapbox/iD-internal/issues/31
+         // nearbyVertices.forEach(function(v) {
+         // });
+         // Reasons why we reset the way id count here:
+         //  1. Continuity with way ids created by the splits so that we can replay
+         //     these actions later if the user decides to create a turn restriction
+         //  2. Avoids churning way ids just by hovering over a vertex
+         //     and displaying the turn restriction editor
 
-           if (index < 0 || index > max) {
-             throw new RangeError('index ' + index + ' out of range 0..' + max);
-           } // If this is a closed way, remove all connector nodes except the first one
-           // (there may be duplicates) and adjust index if necessary..
+         osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
 
+         vertexIds = vertices.map(function (v) {
+           return v.id;
+         });
+         vertices = [];
+         ways = [];
+         vertexIds.forEach(function (id) {
+           var vertex = vgraph.entity(id);
+           var parents = vgraph.parentWays(vertex);
+           vertices.push(vertex);
+           ways = ways.concat(parents);
+         });
+         vertices = utilArrayUniq(vertices);
+         ways = utilArrayUniq(ways);
+         vertexIds = vertices.map(function (v) {
+           return v.id;
+         });
+         wayIds = ways.map(function (w) {
+           return w.id;
+         }); // STEP 6:  Update the ways with some metadata that will be useful for
+         // walking the intersection graph later and rendering turn arrows.
 
-           if (isClosed) {
-             var connector = this.first(); // leading connectors..
+         function withMetadata(way, vertexIds) {
+           var __oneWay = way.isOneWay(); // which affixes are key vertices?
 
-             var i = 1;
 
-             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index > i) index--;
-             } // trailing connectors..
+           var __first = vertexIds.indexOf(way.first()) !== -1;
 
+           var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
 
-             i = nodes.length - 1;
 
-             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index > i) index--;
-               i = nodes.length - 1;
-             }
-           }
+           var __via = __first && __last;
 
-           nodes.splice(index, 0, id);
-           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+           var __from = __first && !__oneWay || __last;
 
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
+           var __to = __first || __last && !__oneWay;
 
-           return this.update({
-             nodes: nodes
+           return way.update({
+             __first: __first,
+             __last: __last,
+             __from: __from,
+             __via: __via,
+             __to: __to,
+             __oneWay: __oneWay
            });
-         },
-         // Replaces the node which is currently at position index with the given node (id).
-         // Consecutive duplicates are eliminated including existing ones.
-         // Circularity is preserved when updating a node.
-         updateNode: function updateNode(id, index) {
-           var nodes = this.nodes.slice();
-           var isClosed = this.isClosed();
-           var max = nodes.length - 1;
+         }
 
-           if (index === undefined || index < 0 || index > max) {
-             throw new RangeError('index ' + index + ' out of range 0..' + max);
-           } // If this is a closed way, remove all connector nodes except the first one
-           // (there may be duplicates) and adjust index if necessary..
+         ways = [];
+         wayIds.forEach(function (id) {
+           var way = withMetadata(vgraph.entity(id), vertexIds);
+           vgraph = vgraph.replace(way);
+           ways.push(way);
+         }); // STEP 7:  Simplify - This is an iterative process where we:
+         //  1. Find trivial vertices with only 2 parents
+         //  2. trim off the leaf way from those vertices and remove from vgraph
+
+         var keepGoing;
+         var removeWayIds = [];
+         var removeVertexIds = [];
+
+         do {
+           keepGoing = false;
+           checkVertices = vertexIds.slice();
+
+           for (i = 0; i < checkVertices.length; i++) {
+             var vertexId = checkVertices[i];
+             vertex = vgraph.hasEntity(vertexId);
+
+             if (!vertex) {
+               if (vertexIds.indexOf(vertexId) !== -1) {
+                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+               }
 
+               removeVertexIds.push(vertexId);
+               continue;
+             }
 
-           if (isClosed) {
-             var connector = this.first(); // leading connectors..
+             parents = vgraph.parentWays(vertex);
 
-             var i = 1;
+             if (parents.length < 3) {
+               if (vertexIds.indexOf(vertexId) !== -1) {
+                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+               }
+             }
 
-             while (i < nodes.length && nodes.length > 2 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index > i) index--;
-             } // trailing connectors..
+             if (parents.length === 2) {
+               // vertex with 2 parents is trivial
+               var a = parents[0];
+               var b = parents[1];
+               var aIsLeaf = a && !a.__via;
+               var bIsLeaf = b && !b.__via;
+               var leaf, survivor;
 
+               if (aIsLeaf && !bIsLeaf) {
+                 leaf = a;
+                 survivor = b;
+               } else if (!aIsLeaf && bIsLeaf) {
+                 leaf = b;
+                 survivor = a;
+               }
 
-             i = nodes.length - 1;
+               if (leaf && survivor) {
+                 survivor = withMetadata(survivor, vertexIds); // update survivor way
 
-             while (i > 0 && nodes.length > 1 && nodes[i] === connector) {
-               nodes.splice(i, 1);
-               if (index === i) index = 0; // update leading connector instead
+                 vgraph = vgraph.replace(survivor).remove(leaf); // update graph
 
-               i = nodes.length - 1;
+                 removeWayIds.push(leaf.id);
+                 keepGoing = true;
+               }
              }
-           }
 
-           nodes.splice(index, 1, id);
-           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+             parents = vgraph.parentWays(vertex);
 
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
+             if (parents.length < 2) {
+               // vertex is no longer a key vertex
+               if (vertexIds.indexOf(vertexId) !== -1) {
+                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+               }
 
-           return this.update({
-             nodes: nodes
-           });
-         },
-         // Replaces each occurrence of node id needle with replacement.
-         // Consecutive duplicates are eliminated including existing ones.
-         // Circularity is preserved.
-         replaceNode: function replaceNode(needleID, replacementID) {
-           var nodes = this.nodes.slice();
-           var isClosed = this.isClosed();
+               removeVertexIds.push(vertexId);
+               keepGoing = true;
+             }
 
-           for (var i = 0; i < nodes.length; i++) {
-             if (nodes[i] === needleID) {
-               nodes[i] = replacementID;
+             if (parents.length < 1) {
+               // vertex is no longer attached to anything
+               vgraph = vgraph.remove(vertex);
              }
            }
+         } while (keepGoing);
 
-           nodes = nodes.filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+         vertices = vertices.filter(function (vertex) {
+           return removeVertexIds.indexOf(vertex.id) === -1;
+         }).map(function (vertex) {
+           return vgraph.entity(vertex.id);
+         });
+         ways = ways.filter(function (way) {
+           return removeWayIds.indexOf(way.id) === -1;
+         }).map(function (way) {
+           return vgraph.entity(way.id);
+         }); // OK!  Here is our intersection..
 
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
+         var intersection = {
+           graph: vgraph,
+           actions: actions,
+           vertices: vertices,
+           ways: ways
+         }; // Get all the valid turns through this intersection given a starting way id.
+         // This operates on the virtual graph for everything.
+         //
+         // Basically, walk through all possible paths from starting way,
+         //   honoring the existing turn restrictions as we go (watch out for loops!)
+         //
+         // For each path found, generate and return a `osmTurn` datastructure.
+         //
 
-           return this.update({
-             nodes: nodes
+         intersection.turns = function (fromWayId, maxViaWay) {
+           if (!fromWayId) return [];
+           if (!maxViaWay) maxViaWay = 0;
+           var vgraph = intersection.graph;
+           var keyVertexIds = intersection.vertices.map(function (v) {
+             return v.id;
            });
-         },
-         // Removes each occurrence of node id.
-         // Consecutive duplicates are eliminated including existing ones.
-         // Circularity is preserved.
-         removeNode: function removeNode(id) {
-           var nodes = this.nodes.slice();
-           var isClosed = this.isClosed();
-           nodes = nodes.filter(function (node) {
-             return node !== id;
-           }).filter(noRepeatNodes); // If the way was closed before, append a connector node to keep it closed..
+           var start = vgraph.entity(fromWayId);
+           if (!start || !(start.__from || start.__via)) return []; // maxViaWay=0   from-*-to              (0 vias)
+           // maxViaWay=1   from-*-via-*-to        (1 via max)
+           // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)
 
-           if (isClosed && (nodes.length === 1 || nodes[0] !== nodes[nodes.length - 1])) {
-             nodes.push(nodes[0]);
-           }
+           var maxPathLength = maxViaWay * 2 + 3;
+           var turns = [];
+           step(start);
+           return turns; // traverse the intersection graph and find all the valid paths
 
-           return this.update({
-             nodes: nodes
-           });
-         },
-         asJXON: function asJXON(changeset_id) {
-           var r = {
-             way: {
-               '@id': this.osmId(),
-               '@version': this.version || 0,
-               nd: this.nodes.map(function (id) {
-                 return {
-                   keyAttributes: {
-                     ref: osmEntity.id.toOSM(id)
-                   }
-                 };
-               }, this),
-               tag: Object.keys(this.tags).map(function (k) {
-                 return {
-                   keyAttributes: {
-                     k: k,
-                     v: this.tags[k]
-                   }
-                 };
-               }, this)
-             }
-           };
+           function step(entity, currPath, currRestrictions, matchedRestriction) {
+             currPath = (currPath || []).slice(); // shallow copy
 
-           if (changeset_id) {
-             r.way['@changeset'] = changeset_id;
-           }
+             if (currPath.length >= maxPathLength) return;
+             currPath.push(entity.id);
+             currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
-           return r;
-         },
-         asGeoJSON: function asGeoJSON(resolver) {
-           return resolver["transient"](this, 'GeoJSON', function () {
-             var coordinates = resolver.childNodes(this).map(function (n) {
-               return n.loc;
-             });
+             var i, j;
 
-             if (this.isArea() && this.isClosed()) {
-               return {
-                 type: 'Polygon',
-                 coordinates: [coordinates]
-               };
-             } else {
-               return {
-                 type: 'LineString',
-                 coordinates: coordinates
-               };
-             }
-           });
-         },
-         area: function area(resolver) {
-           return resolver["transient"](this, 'area', function () {
-             var nodes = resolver.childNodes(this);
-             var json = {
-               type: 'Polygon',
-               coordinates: [nodes.map(function (n) {
-                 return n.loc;
-               })]
-             };
+             if (entity.type === 'node') {
+               var parents = vgraph.parentWays(entity);
+               var nextWays = []; // which ways can we step into?
 
-             if (!this.isClosed() && nodes.length) {
-               json.coordinates[0].push(nodes[0].loc);
-             }
+               for (i = 0; i < parents.length; i++) {
+                 var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
 
-             var area = d3_geoArea(json); // Heuristic for detecting counterclockwise winding order. Assumes
-             // that OpenStreetMap polygons are not hemisphere-spanning.
+                 if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
 
-             if (area > 2 * Math.PI) {
-               json.coordinates[0] = json.coordinates[0].reverse();
-               area = d3_geoArea(json);
-             }
+                 if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
 
-             return isNaN(area) ? 0 : area;
-           });
-         }
-       }); // Filter function to eliminate consecutive duplicates.
+                 var restrict = null;
 
-       function noRepeatNodes(node, i, arr) {
-         return i === 0 || node !== arr[i - 1];
-       }
+                 for (j = 0; j < currRestrictions.length; j++) {
+                   var restriction = currRestrictions[j];
+                   var f = restriction.memberByRole('from');
+                   var v = restriction.membersByRole('via');
+                   var t = restriction.memberByRole('to');
+                   var isOnly = /^only_/.test(restriction.tags.restriction); // Does the current path match this turn restriction?
 
-       //
-       // 1. Relation tagged with `type=multipolygon` and no interesting tags.
-       // 2. One and only one member with the `outer` role. Must be a way with interesting tags.
-       // 3. No members without a role.
-       //
-       // Old multipolygons are no longer recommended but are still rendered as areas by iD.
+                   var matchesFrom = f.id === fromWayId;
+                   var matchesViaTo = false;
+                   var isAlongOnlyPath = false;
 
-       function osmOldMultipolygonOuterMemberOfRelation(entity, graph) {
-         if (entity.type !== 'relation' || !entity.isMultipolygon() || Object.keys(entity.tags).filter(osmIsInterestingTag).length > 1) {
-           return false;
-         }
+                   if (t.id === way.id) {
+                     // match TO
+                     if (v.length === 1 && v[0].type === 'node') {
+                       // match VIA node
+                       matchesViaTo = v[0].id === entity.id && (matchesFrom && currPath.length === 2 || !matchesFrom && currPath.length > 2);
+                     } else {
+                       // match all VIA ways
+                       var pathVias = [];
 
-         var outerMember;
+                       for (k = 2; k < currPath.length; k += 2) {
+                         // k = 2 skips FROM
+                         pathVias.push(currPath[k]); // (path goes way-node-way...)
+                       }
 
-         for (var memberIndex in entity.members) {
-           var member = entity.members[memberIndex];
+                       var restrictionVias = [];
 
-           if (!member.role || member.role === 'outer') {
-             if (outerMember) return false;
-             if (member.type !== 'way') return false;
-             if (!graph.hasEntity(member.id)) return false;
-             outerMember = graph.entity(member.id);
+                       for (k = 0; k < v.length; k++) {
+                         if (v[k].type === 'way') {
+                           restrictionVias.push(v[k].id);
+                         }
+                       }
 
-             if (Object.keys(outerMember.tags).filter(osmIsInterestingTag).length === 0) {
-               return false;
-             }
-           }
-         }
+                       var diff = utilArrayDifference(pathVias, restrictionVias);
+                       matchesViaTo = !diff.length;
+                     }
+                   } else if (isOnly) {
+                     for (k = 0; k < v.length; k++) {
+                       // way doesn't match TO, but is one of the via ways along the path of an "only"
+                       if (v[k].type === 'way' && v[k].id === way.id) {
+                         isAlongOnlyPath = true;
+                         break;
+                       }
+                     }
+                   }
 
-         return outerMember;
-       } // For fixing up rendering of multipolygons with tags on the outer member.
-       // https://github.com/openstreetmap/iD/issues/613
+                   if (matchesViaTo) {
+                     if (isOnly) {
+                       restrict = {
+                         id: restriction.id,
+                         direct: matchesFrom,
+                         from: f.id,
+                         only: true,
+                         end: true
+                       };
+                     } else {
+                       restrict = {
+                         id: restriction.id,
+                         direct: matchesFrom,
+                         from: f.id,
+                         no: true,
+                         end: true
+                       };
+                     }
+                   } else {
+                     // indirect - caused by a different nearby restriction
+                     if (isAlongOnlyPath) {
+                       restrict = {
+                         id: restriction.id,
+                         direct: false,
+                         from: f.id,
+                         only: true,
+                         end: false
+                       };
+                     } else if (isOnly) {
+                       restrict = {
+                         id: restriction.id,
+                         direct: false,
+                         from: f.id,
+                         no: true,
+                         end: true
+                       };
+                     }
+                   } // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
 
-       function osmIsOldMultipolygonOuterMember(entity, graph) {
-         if (entity.type !== 'way' || Object.keys(entity.tags).filter(osmIsInterestingTag).length === 0) return false;
-         var parents = graph.parentRelations(entity);
-         if (parents.length !== 1) return false;
-         var parent = parents[0];
-         if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) return false;
-         var members = parent.members,
-             member;
 
-         for (var i = 0; i < members.length; i++) {
-           member = members[i];
-           if (member.id === entity.id && member.role && member.role !== 'outer') return false; // Not outer member
+                   if (restrict && restrict.direct) break;
+                 }
 
-           if (member.id !== entity.id && (!member.role || member.role === 'outer')) return false; // Not a simple multipolygon
-         }
+                 nextWays.push({
+                   way: way,
+                   restrict: restrict
+                 });
+               }
 
-         return parent;
-       }
-       function osmOldMultipolygonOuterMember(entity, graph) {
-         if (entity.type !== 'way') return false;
-         var parents = graph.parentRelations(entity);
-         if (parents.length !== 1) return false;
-         var parent = parents[0];
-         if (!parent.isMultipolygon() || Object.keys(parent.tags).filter(osmIsInterestingTag).length > 1) return false;
-         var members = parent.members,
-             member,
-             outerMember;
+               nextWays.forEach(function (nextWay) {
+                 step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
+               });
+             } else {
+               // entity.type === 'way'
+               if (currPath.length >= 3) {
+                 // this is a "complete" path..
+                 var turnPath = currPath.slice(); // shallow copy
+                 // an indirect restriction - only include the partial path (starting at FROM)
 
-         for (var i = 0; i < members.length; i++) {
-           member = members[i];
+                 if (matchedRestriction && matchedRestriction.direct === false) {
+                   for (i = 0; i < turnPath.length; i++) {
+                     if (turnPath[i] === matchedRestriction.from) {
+                       turnPath = turnPath.slice(i);
+                       break;
+                     }
+                   }
+                 }
 
-           if (!member.role || member.role === 'outer') {
-             if (outerMember) return false; // Not a simple multipolygon
+                 var turn = pathToTurn(turnPath);
 
-             outerMember = member;
-           }
-         }
+                 if (turn) {
+                   if (matchedRestriction) {
+                     turn.restrictionID = matchedRestriction.id;
+                     turn.no = matchedRestriction.no;
+                     turn.only = matchedRestriction.only;
+                     turn.direct = matchedRestriction.direct;
+                   }
 
-         if (!outerMember) return false;
-         var outerEntity = graph.hasEntity(outerMember.id);
-         if (!outerEntity || !Object.keys(outerEntity.tags).filter(osmIsInterestingTag).length) return false;
-         return outerEntity;
-       } // Join `toJoin` array into sequences of connecting ways.
-       // Segments which share identical start/end nodes will, as much as possible,
-       // be connected with each other.
-       //
-       // The return value is a nested array. Each constituent array contains elements
-       // of `toJoin` which have been determined to connect.
-       //
-       // Each consitituent array also has a `nodes` property whose value is an
-       // ordered array of member nodes, with appropriate order reversal and
-       // start/end coordinate de-duplication.
-       //
-       // Members of `toJoin` must have, at minimum, `type` and `id` properties.
-       // Thus either an array of `osmWay`s or a relation member array may be used.
-       //
-       // If an member is an `osmWay`, its tags and childnodes may be reversed via
-       // `actionReverse` in the output.
-       //
-       // The returned sequences array also has an `actions` array property, containing
-       // any reversal actions that should be applied to the graph, should the calling
-       // code attempt to actually join the given ways.
-       //
-       // Incomplete members (those for which `graph.hasEntity(element.id)` returns
-       // false) and non-way members are ignored.
-       //
+                   turns.push(osmTurn(turn));
+                 }
 
-       function osmJoinWays(toJoin, graph) {
-         function resolve(member) {
-           return graph.childNodes(graph.entity(member.id));
-         }
+                 if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
+               }
 
-         function reverse(item) {
-           var action = actionReverse(item.id, {
-             reverseOneway: true
-           });
-           sequences.actions.push(action);
-           return item instanceof osmWay ? action(graph).entity(item.id) : item;
-         } // make a copy containing only the items to join
+               if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
+               // which nodes can we step into?
 
+               var n1 = vgraph.entity(entity.first());
+               var n2 = vgraph.entity(entity.last());
+               var dist = geoSphericalDistance(n1.loc, n2.loc);
+               var nextNodes = [];
 
-         toJoin = toJoin.filter(function (member) {
-           return member.type === 'way' && graph.hasEntity(member.id);
-         }); // Are the things we are joining relation members or `osmWays`?
-         // If `osmWays`, skip the "prefer a forward path" code below (see #4872)
+               if (currPath.length > 1) {
+                 if (dist > maxDistance) return; // the next node is too far
 
-         var i;
-         var joinAsMembers = true;
+                 if (!entity.__via) return; // this way is a leaf / can't be a via
+               }
 
-         for (i = 0; i < toJoin.length; i++) {
-           if (toJoin[i] instanceof osmWay) {
-             joinAsMembers = false;
-             break;
-           }
-         }
+               if (!entity.__oneWay && // bidirectional..
+               keyVertexIds.indexOf(n1.id) !== -1 && // key vertex..
+               currPath.indexOf(n1.id) === -1) {
+                 // haven't seen it yet..
+                 nextNodes.push(n1); // can advance to first node
+               }
 
-         var sequences = [];
-         sequences.actions = [];
+               if (keyVertexIds.indexOf(n2.id) !== -1 && // key vertex..
+               currPath.indexOf(n2.id) === -1) {
+                 // haven't seen it yet..
+                 nextNodes.push(n2); // can advance to last node
+               }
 
-         while (toJoin.length) {
-           // start a new sequence
-           var item = toJoin.shift();
-           var currWays = [item];
-           var currNodes = resolve(item).slice(); // add to it
+               nextNodes.forEach(function (nextNode) {
+                 // gather restrictions FROM this way
+                 var fromRestrictions = vgraph.parentRelations(entity).filter(function (r) {
+                   if (!r.isRestriction()) return false;
+                   var f = r.memberByRole('from');
+                   if (!f || f.id !== entity.id) return false;
+                   var isOnly = /^only_/.test(r.tags.restriction);
+                   if (!isOnly) return true; // `only_` restrictions only matter along the direction of the VIA - #4849
 
-           while (toJoin.length) {
-             var start = currNodes[0];
-             var end = currNodes[currNodes.length - 1];
-             var fn = null;
-             var nodes = null; // Find the next way/member to join.
+                   var isOnlyVia = false;
+                   var v = r.membersByRole('via');
 
-             for (i = 0; i < toJoin.length; i++) {
-               item = toJoin[i];
-               nodes = resolve(item); // (for member ordering only, not way ordering - see #4872)
-               // Strongly prefer to generate a forward path that preserves the order
-               // of the members array. For multipolygons and most relations, member
-               // order does not matter - but for routes, it does. (see #4589)
-               // If we started this sequence backwards (i.e. next member way attaches to
-               // the start node and not the end node), reverse the initial way before continuing.
+                   if (v.length === 1 && v[0].type === 'node') {
+                     // via node
+                     isOnlyVia = v[0].id === nextNode.id;
+                   } else {
+                     // via way(s)
+                     for (var i = 0; i < v.length; i++) {
+                       if (v[i].type !== 'way') continue;
+                       var viaWay = vgraph.entity(v[i].id);
 
-               if (joinAsMembers && currWays.length === 1 && nodes[0] !== end && nodes[nodes.length - 1] !== end && (nodes[nodes.length - 1] === start || nodes[0] === start)) {
-                 currWays[0] = reverse(currWays[0]);
-                 currNodes.reverse();
-                 start = currNodes[0];
-                 end = currNodes[currNodes.length - 1];
-               }
+                       if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
+                         isOnlyVia = true;
+                         break;
+                       }
+                     }
+                   }
 
-               if (nodes[0] === end) {
-                 fn = currNodes.push; // join to end
+                   return isOnlyVia;
+                 });
+                 step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
+               });
+             }
+           } // assumes path is alternating way-node-way of odd length
 
-                 nodes = nodes.slice(1);
-                 break;
-               } else if (nodes[nodes.length - 1] === end) {
-                 fn = currNodes.push; // join to end
 
-                 nodes = nodes.slice(0, -1).reverse();
-                 item = reverse(item);
-                 break;
-               } else if (nodes[nodes.length - 1] === start) {
-                 fn = currNodes.unshift; // join to beginning
+           function pathToTurn(path) {
+             if (path.length < 3) return;
+             var fromWayId, fromNodeId, fromVertexId;
+             var toWayId, toNodeId, toVertexId;
+             var viaWayIds, viaNodeId, isUturn;
+             fromWayId = path[0];
+             toWayId = path[path.length - 1];
 
-                 nodes = nodes.slice(0, -1);
-                 break;
-               } else if (nodes[0] === start) {
-                 fn = currNodes.unshift; // join to beginning
+             if (path.length === 3 && fromWayId === toWayId) {
+               // u turn
+               var way = vgraph.entity(fromWayId);
+               if (way.__oneWay) return null;
+               isUturn = true;
+               viaNodeId = fromVertexId = toVertexId = path[1];
+               fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
+             } else {
+               isUturn = false;
+               fromVertexId = path[1];
+               fromNodeId = adjacentNode(fromWayId, fromVertexId);
+               toVertexId = path[path.length - 2];
+               toNodeId = adjacentNode(toWayId, toVertexId);
 
-                 nodes = nodes.slice(1).reverse();
-                 item = reverse(item);
-                 break;
+               if (path.length === 3) {
+                 viaNodeId = path[1];
                } else {
-                 fn = nodes = null;
+                 viaWayIds = path.filter(function (entityId) {
+                   return entityId[0] === 'w';
+                 });
+                 viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1); // remove first, last
                }
              }
 
-             if (!nodes) {
-               // couldn't find a joinable way/member
-               break;
-             }
+             return {
+               key: path.join('_'),
+               path: path,
+               from: {
+                 node: fromNodeId,
+                 way: fromWayId,
+                 vertex: fromVertexId
+               },
+               via: {
+                 node: viaNodeId,
+                 ways: viaWayIds
+               },
+               to: {
+                 node: toNodeId,
+                 way: toWayId,
+                 vertex: toVertexId
+               },
+               u: isUturn
+             };
 
-             fn.apply(currWays, [item]);
-             fn.apply(currNodes, nodes);
-             toJoin.splice(i, 1);
+             function adjacentNode(wayId, affixId) {
+               var nodes = vgraph.entity(wayId).nodes;
+               return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
+             }
            }
+         };
 
-           currWays.nodes = currNodes;
-           sequences.push(currWays);
-         }
-
-         return sequences;
+         return intersection;
        }
+       function osmInferRestriction(graph, turn, projection) {
+         var fromWay = graph.entity(turn.from.way);
+         var fromNode = graph.entity(turn.from.node);
+         var fromVertex = graph.entity(turn.from.vertex);
+         var toWay = graph.entity(turn.to.way);
+         var toNode = graph.entity(turn.to.node);
+         var toVertex = graph.entity(turn.to.vertex);
+         var fromOneWay = fromWay.tags.oneway === 'yes';
+         var toOneWay = toWay.tags.oneway === 'yes';
+         var angle = (geoAngle(fromVertex, fromNode, projection) - geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
 
-       function actionAddMember(relationId, member, memberIndex, insertPair) {
-         return function action(graph) {
-           var relation = graph.entity(relationId); // There are some special rules for Public Transport v2 routes.
-
-           var isPTv2 = /stop|platform/.test(member.role);
+         while (angle < 0) {
+           angle += 360;
+         }
 
-           if ((isNaN(memberIndex) || insertPair) && member.type === 'way' && !isPTv2) {
-             // Try to perform sensible inserts based on how the ways join together
-             graph = addWayMember(relation, graph);
-           } else {
-             // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
-             // Stops and Platforms for PTv2 should be ordered first.
-             // hack: We do not currently have the ability to place them in the exactly correct order.
-             if (isPTv2 && isNaN(memberIndex)) {
-               memberIndex = 0;
-             }
+         if (fromNode === toNode) {
+           return 'no_u_turn';
+         }
 
-             graph = graph.replace(relation.addMember(member, memberIndex));
-           }
+         if ((angle < 23 || angle > 336) && fromOneWay && toOneWay) {
+           return 'no_u_turn'; // wider tolerance for u-turn if both ways are oneway
+         }
 
-           return graph;
-         }; // Add a way member into the relation "wherever it makes sense".
-         // In this situation we were not supplied a memberIndex.
+         if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex) {
+           return 'no_u_turn'; // even wider tolerance for u-turn if there is a via way (from !== to)
+         }
 
-         function addWayMember(relation, graph) {
-           var groups, tempWay, item, i, j, k; // remove PTv2 stops and platforms before doing anything.
+         if (angle < 158) {
+           return 'no_right_turn';
+         }
 
-           var PTv2members = [];
-           var members = [];
+         if (angle > 202) {
+           return 'no_left_turn';
+         }
 
-           for (i = 0; i < relation.members.length; i++) {
-             var m = relation.members[i];
+         return 'no_straight_on';
+       }
 
-             if (/stop|platform/.test(m.role)) {
-               PTv2members.push(m);
+       function actionMergePolygon(ids, newRelationId) {
+         function groupEntities(graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           var geometryGroups = utilArrayGroupBy(entities, function (entity) {
+             if (entity.type === 'way' && entity.isClosed()) {
+               return 'closedWay';
+             } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+               return 'multipolygon';
              } else {
-               members.push(m);
+               return 'other';
              }
-           }
-
-           relation = relation.update({
-             members: members
            });
+           return Object.assign({
+             closedWay: [],
+             multipolygon: [],
+             other: []
+           }, geometryGroups);
+         }
 
-           if (insertPair) {
-             // We're adding a member that must stay paired with an existing member.
-             // (This feature is used by `actionSplit`)
-             //
-             // This is tricky because the members may exist multiple times in the
-             // member list, and with different A-B/B-A ordering and different roles.
-             // (e.g. a bus route that loops out and back - #4589).
-             //
-             // Replace the existing member with a temporary way,
-             // so that `osmJoinWays` can treat the pair like a single way.
-             tempWay = osmWay({
-               id: 'wTemp',
-               nodes: insertPair.nodes
-             });
-             graph = graph.replace(tempWay);
-             var tempMember = {
-               id: tempWay.id,
-               type: 'way',
-               role: member.role
-             };
-             var tempRelation = relation.replaceMember({
-               id: insertPair.originalID
-             }, tempMember, true);
-             groups = utilArrayGroupBy(tempRelation.members, 'type');
-             groups.way = groups.way || [];
-           } else {
-             // Add the member anywhere, one time. Just push and let `osmJoinWays` decide where to put it.
-             groups = utilArrayGroupBy(relation.members, 'type');
-             groups.way = groups.way || [];
-             groups.way.push(member);
-           }
-
-           members = withIndex(groups.way);
-           var joined = osmJoinWays(members, graph); // `joined` might not contain all of the way members,
-           // But will contain only the completed (downloaded) members
+         var action = function action(graph) {
+           var entities = groupEntities(graph); // An array representing all the polygons that are part of the multipolygon.
+           //
+           // Each element is itself an array of objects with an id property, and has a
+           // locs property which is an array of the locations forming the polygon.
 
-           for (i = 0; i < joined.length; i++) {
-             var segment = joined[i];
-             var nodes = segment.nodes.slice();
-             var startIndex = segment[0].index; // j = array index in `members` where this segment starts
+           var polygons = entities.multipolygon.reduce(function (polygons, m) {
+             return polygons.concat(osmJoinWays(m.members, graph));
+           }, []).concat(entities.closedWay.map(function (d) {
+             var member = [{
+               id: d.id
+             }];
+             member.nodes = graph.childNodes(d);
+             return member;
+           })); // contained is an array of arrays of boolean values,
+           // where contained[j][k] is true iff the jth way is
+           // contained by the kth way.
 
-             for (j = 0; j < members.length; j++) {
-               if (members[j].index === startIndex) {
-                 break;
-               }
-             } // k = each member in segment
+           var contained = polygons.map(function (w, i) {
+             return polygons.map(function (d, n) {
+               if (i === n) return null;
+               return geoPolygonContainsPolygon(d.nodes.map(function (n) {
+                 return n.loc;
+               }), w.nodes.map(function (n) {
+                 return n.loc;
+               }));
+             });
+           }); // Sort all polygons as either outer or inner ways
 
+           var members = [];
+           var outer = true;
 
-             for (k = 0; k < segment.length; k++) {
-               item = segment[k];
-               var way = graph.entity(item.id); // If this is a paired item, generate members in correct order and role
+           while (polygons.length) {
+             extractUncontained(polygons);
+             polygons = polygons.filter(isContained);
+             contained = contained.filter(isContained).map(filterContained);
+           }
 
-               if (tempWay && item.id === tempWay.id) {
-                 if (nodes[0].id === insertPair.nodes[0]) {
-                   item.pair = [{
-                     id: insertPair.originalID,
-                     type: 'way',
-                     role: item.role
-                   }, {
-                     id: insertPair.insertedID,
-                     type: 'way',
-                     role: item.role
-                   }];
-                 } else {
-                   item.pair = [{
-                     id: insertPair.insertedID,
-                     type: 'way',
-                     role: item.role
-                   }, {
-                     id: insertPair.originalID,
-                     type: 'way',
-                     role: item.role
-                   }];
-                 }
-               } // reorder `members` if necessary
+           function isContained(d, i) {
+             return contained[i].some(function (val) {
+               return val;
+             });
+           }
 
+           function filterContained(d) {
+             return d.filter(isContained);
+           }
 
-               if (k > 0) {
-                 if (j + k >= members.length || item.index !== members[j + k].index) {
-                   moveMember(members, item.index, j + k);
-                 }
+           function extractUncontained(polygons) {
+             polygons.forEach(function (d, i) {
+               if (!isContained(d, i)) {
+                 d.forEach(function (member) {
+                   members.push({
+                     type: 'way',
+                     id: member.id,
+                     role: outer ? 'outer' : 'inner'
+                   });
+                 });
                }
+             });
+             outer = !outer;
+           } // Move all tags to one relation.
+           // Keep the oldest multipolygon alive if it exists.
 
-               nodes.splice(0, way.nodes.length - 1);
-             }
-           }
-
-           if (tempWay) {
-             graph = graph.remove(tempWay);
-           } // Final pass: skip dead items, split pairs, remove index properties
 
+           var relation;
 
-           var wayMembers = [];
+           if (entities.multipolygon.length > 0) {
+             var oldestID = utilOldestID(entities.multipolygon.map(function (entity) {
+               return entity.id;
+             }));
+             relation = entities.multipolygon.find(function (entity) {
+               return entity.id === oldestID;
+             });
+           } else {
+             relation = osmRelation({
+               id: newRelationId,
+               tags: {
+                 type: 'multipolygon'
+               }
+             });
+           }
 
-           for (i = 0; i < members.length; i++) {
-             item = members[i];
-             if (item.index === -1) continue;
+           entities.multipolygon.forEach(function (m) {
+             if (m.id !== relation.id) {
+               relation = relation.mergeTags(m.tags);
+               graph = graph.remove(m);
+             }
+           });
+           entities.closedWay.forEach(function (way) {
+             function isThisOuter(m) {
+               return m.id === way.id && m.role !== 'inner';
+             }
 
-             if (item.pair) {
-               wayMembers.push(item.pair[0]);
-               wayMembers.push(item.pair[1]);
-             } else {
-               wayMembers.push(utilObjectOmit(item, ['index']));
+             if (members.some(isThisOuter)) {
+               relation = relation.mergeTags(way.tags);
+               graph = graph.replace(way.update({
+                 tags: {}
+               }));
              }
-           } // Put stops and platforms first, then nodes, ways, relations
-           // This is recommended for Public Transport v2 routes:
-           // see https://wiki.openstreetmap.org/wiki/Public_transport#Service_routes
+           });
+           return graph.replace(relation.update({
+             members: members,
+             tags: utilObjectOmit(relation.tags, ['area'])
+           }));
+         };
 
+         action.disabled = function (graph) {
+           var entities = groupEntities(graph);
 
-           var newMembers = PTv2members.concat(groups.node || [], wayMembers, groups.relation || []);
-           return graph.replace(relation.update({
-             members: newMembers
-           })); // `moveMember()` changes the `members` array in place by splicing
-           // the item with `.index = findIndex` to where it belongs,
-           // and marking the old position as "dead" with `.index = -1`
-           //
-           // j=5, k=0                jk
-           // segment                 5 4 7 6
-           // members       0 1 2 3 4 5 6 7 8 9        keep 5 in j+k
-           //
-           // j=5, k=1                j k
-           // segment                 5 4 7 6
-           // members       0 1 2 3 4 5 6 7 8 9        move 4 to j+k
-           // members       0 1 2 3 x 5 4 6 7 8 9      moved
-           //
-           // j=5, k=2                j   k
-           // segment                 5 4 7 6
-           // members       0 1 2 3 x 5 4 6 7 8 9      move 7 to j+k
-           // members       0 1 2 3 x 5 4 7 6 x 8 9    moved
-           //
-           // j=5, k=3                j     k
-           // segment                 5 4 7 6
-           // members       0 1 2 3 x 5 4 7 6 x 8 9    keep 6 in j+k
-           //
+           if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
+             return 'not_eligible';
+           }
 
-           function moveMember(arr, findIndex, toIndex) {
-             var i;
+           if (!entities.multipolygon.every(function (r) {
+             return r.isComplete(graph);
+           })) {
+             return 'incomplete_relation';
+           }
 
-             for (i = 0; i < arr.length; i++) {
-               if (arr[i].index === findIndex) {
-                 break;
+           if (!entities.multipolygon.length) {
+             var sharedMultipolygons = [];
+             entities.closedWay.forEach(function (way, i) {
+               if (i === 0) {
+                 sharedMultipolygons = graph.parentMultipolygons(way);
+               } else {
+                 sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
                }
-             }
+             });
+             sharedMultipolygons = sharedMultipolygons.filter(function (relation) {
+               return relation.members.length === entities.closedWay.length;
+             });
 
-             var item = Object.assign({}, arr[i]); // shallow copy
+             if (sharedMultipolygons.length) {
+               // don't create a new multipolygon if it'd be redundant
+               return 'not_eligible';
+             }
+           } else if (entities.closedWay.some(function (way) {
+             return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
+           })) {
+             // don't add a way to a multipolygon again if it's already a member
+             return 'not_eligible';
+           }
+         };
 
-             arr[i].index = -1; // mark as dead
+         return action;
+       }
 
-             item.index = toIndex;
-             arr.splice(toIndex, 0, item);
-           } // This is the same as `Relation.indexedMembers`,
-           // Except we don't want to index all the members, only the ways
+       var DESCRIPTORS$1 = descriptors;
+       var objectDefinePropertyModule = objectDefineProperty;
+       var regExpFlags = regexpFlags$1;
+       var fails$4 = fails$S;
 
+       var RegExpPrototype = RegExp.prototype;
 
-           function withIndex(arr) {
-             var result = new Array(arr.length);
+       var FORCED$2 = DESCRIPTORS$1 && fails$4(function () {
+         // eslint-disable-next-line es/no-object-getownpropertydescriptor -- safe
+         return Object.getOwnPropertyDescriptor(RegExpPrototype, 'flags').get.call({ dotAll: true, sticky: true }) !== 'sy';
+       });
 
-             for (var i = 0; i < arr.length; i++) {
-               result[i] = Object.assign({}, arr[i]); // shallow copy
+       // `RegExp.prototype.flags` getter
+       // https://tc39.es/ecma262/#sec-get-regexp.prototype.flags
+       if (FORCED$2) objectDefinePropertyModule.f(RegExpPrototype, 'flags', {
+         configurable: true,
+         get: regExpFlags
+       });
 
-               result[i].index = i;
-             }
+       var fastDeepEqual = function equal(a, b) {
+         if (a === b) return true;
 
-             return result;
-           }
-         }
-       }
+         if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
+           if (a.constructor !== b.constructor) return false;
+           var length, i, keys;
 
-       function actionAddMidpoint(midpoint, node) {
-         return function (graph) {
-           graph = graph.replace(node.move(midpoint.loc));
-           var parents = utilArrayIntersection(graph.parentWays(graph.entity(midpoint.edge[0])), graph.parentWays(graph.entity(midpoint.edge[1])));
-           parents.forEach(function (way) {
-             for (var i = 0; i < way.nodes.length - 1; i++) {
-               if (geoEdgeEqual([way.nodes[i], way.nodes[i + 1]], midpoint.edge)) {
-                 graph = graph.replace(graph.entity(way.id).addNode(node.id, i + 1)); // Add only one midpoint on doubled-back segments,
-                 // turning them into self-intersections.
+           if (Array.isArray(a)) {
+             length = a.length;
+             if (length != b.length) return false;
 
-                 return;
-               }
+             for (i = length; i-- !== 0;) {
+               if (!equal(a[i], b[i])) return false;
              }
-           });
-           return graph;
-         };
-       }
-
-       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/AddNodeToWayAction.as
-       function actionAddVertex(wayId, nodeId, index) {
-         return function (graph) {
-           return graph.replace(graph.entity(wayId).addNode(nodeId, index));
-         };
-       }
-
-       function actionChangeMember(relationId, member, memberIndex) {
-         return function (graph) {
-           return graph.replace(graph.entity(relationId).updateMember(member, memberIndex));
-         };
-       }
-
-       function actionChangePreset(entityID, oldPreset, newPreset, skipFieldDefaults) {
-         return function action(graph) {
-           var entity = graph.entity(entityID);
-           var geometry = entity.geometry(graph);
-           var tags = entity.tags;
-           if (oldPreset) tags = oldPreset.unsetTags(tags, geometry);
-           if (newPreset) tags = newPreset.setTags(tags, geometry, skipFieldDefaults);
-           return graph.replace(entity.update({
-             tags: tags
-           }));
-         };
-       }
-
-       function actionChangeTags(entityId, tags) {
-         return function (graph) {
-           var entity = graph.entity(entityId);
-           return graph.replace(entity.update({
-             tags: tags
-           }));
-         };
-       }
 
-       function osmNode() {
-         if (!(this instanceof osmNode)) {
-           return new osmNode().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
-         }
-       }
-       osmEntity.node = osmNode;
-       osmNode.prototype = Object.create(osmEntity.prototype);
-       Object.assign(osmNode.prototype, {
-         type: 'node',
-         loc: [9999, 9999],
-         extent: function extent() {
-           return new geoExtent(this.loc);
-         },
-         geometry: function geometry(graph) {
-           return graph["transient"](this, 'geometry', function () {
-             return graph.isPoi(this) ? 'point' : 'vertex';
-           });
-         },
-         move: function move(loc) {
-           return this.update({
-             loc: loc
-           });
-         },
-         isDegenerate: function isDegenerate() {
-           return !(Array.isArray(this.loc) && this.loc.length === 2 && this.loc[0] >= -180 && this.loc[0] <= 180 && this.loc[1] >= -90 && this.loc[1] <= 90);
-         },
-         // Inspect tags and geometry to determine which direction(s) this node/vertex points
-         directions: function directions(resolver, projection) {
-           var val;
-           var i; // which tag to use?
+             return true;
+           }
 
-           if (this.isHighwayIntersection(resolver) && (this.tags.stop || '').toLowerCase() === 'all') {
-             // all-way stop tag on a highway intersection
-             val = 'all';
-           } else {
-             // generic direction tag
-             val = (this.tags.direction || '').toLowerCase(); // better suffix-style direction tag
+           if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
+           if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
+           if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
+           keys = Object.keys(a);
+           length = keys.length;
+           if (length !== Object.keys(b).length) return false;
 
-             var re = /:direction$/i;
-             var keys = Object.keys(this.tags);
+           for (i = length; i-- !== 0;) {
+             if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
+           }
 
-             for (i = 0; i < keys.length; i++) {
-               if (re.test(keys[i])) {
-                 val = this.tags[keys[i]].toLowerCase();
-                 break;
-               }
-             }
+           for (i = length; i-- !== 0;) {
+             var key = keys[i];
+             if (!equal(a[key], b[key])) return false;
            }
 
-           if (val === '') return [];
-           var cardinal = {
-             north: 0,
-             n: 0,
-             northnortheast: 22,
-             nne: 22,
-             northeast: 45,
-             ne: 45,
-             eastnortheast: 67,
-             ene: 67,
-             east: 90,
-             e: 90,
-             eastsoutheast: 112,
-             ese: 112,
-             southeast: 135,
-             se: 135,
-             southsoutheast: 157,
-             sse: 157,
-             south: 180,
-             s: 180,
-             southsouthwest: 202,
-             ssw: 202,
-             southwest: 225,
-             sw: 225,
-             westsouthwest: 247,
-             wsw: 247,
-             west: 270,
-             w: 270,
-             westnorthwest: 292,
-             wnw: 292,
-             northwest: 315,
-             nw: 315,
-             northnorthwest: 337,
-             nnw: 337
-           };
-           var values = val.split(';');
-           var results = [];
-           values.forEach(function (v) {
-             // swap cardinal for numeric directions
-             if (cardinal[v] !== undefined) {
-               v = cardinal[v];
-             } // numeric direction - just add to results
+           return true;
+         } // true if both NaN, false otherwise
 
 
-             if (v !== '' && !isNaN(+v)) {
-               results.push(+v);
-               return;
-             } // string direction - inspect parent ways
+         return a !== a && b !== b;
+       };
 
+       // J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
+       // comparison, Bell Telephone Laboratories CSTR #41 (1976)
+       // http://www.cs.dartmouth.edu/~doug/
+       // https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
+       //
+       // Expects two arrays, finds longest common sequence
 
-             var lookBackward = this.tags['traffic_sign:backward'] || v === 'backward' || v === 'both' || v === 'all';
-             var lookForward = this.tags['traffic_sign:forward'] || v === 'forward' || v === 'both' || v === 'all';
-             if (!lookForward && !lookBackward) return;
-             var nodeIds = {};
-             resolver.parentWays(this).forEach(function (parent) {
-               var nodes = parent.nodes;
+       function LCS(buffer1, buffer2) {
+         var equivalenceClasses = {};
 
-               for (i = 0; i < nodes.length; i++) {
-                 if (nodes[i] === this.id) {
-                   // match current entity
-                   if (lookForward && i > 0) {
-                     nodeIds[nodes[i - 1]] = true; // look back to prev node
-                   }
+         for (var j = 0; j < buffer2.length; j++) {
+           var item = buffer2[j];
 
-                   if (lookBackward && i < nodes.length - 1) {
-                     nodeIds[nodes[i + 1]] = true; // look ahead to next node
-                   }
-                 }
-               }
-             }, this);
-             Object.keys(nodeIds).forEach(function (nodeId) {
-               // +90 because geoAngle returns angle from X axis, not Y (north)
-               results.push(geoAngle(this, resolver.entity(nodeId), projection) * (180 / Math.PI) + 90);
-             }, this);
-           }, this);
-           return utilArrayUniq(results);
-         },
-         isEndpoint: function isEndpoint(resolver) {
-           return resolver["transient"](this, 'isEndpoint', function () {
-             var id = this.id;
-             return resolver.parentWays(this).filter(function (parent) {
-               return !parent.isClosed() && !!parent.affix(id);
-             }).length > 0;
-           });
-         },
-         isConnected: function isConnected(resolver) {
-           return resolver["transient"](this, 'isConnected', function () {
-             var parents = resolver.parentWays(this);
+           if (equivalenceClasses[item]) {
+             equivalenceClasses[item].push(j);
+           } else {
+             equivalenceClasses[item] = [j];
+           }
+         }
 
-             if (parents.length > 1) {
-               // vertex is connected to multiple parent ways
-               for (var i in parents) {
-                 if (parents[i].geometry(resolver) === 'line' && parents[i].hasInterestingTags()) return true;
-               }
-             } else if (parents.length === 1) {
-               var way = parents[0];
-               var nodes = way.nodes.slice();
+         var NULLRESULT = {
+           buffer1index: -1,
+           buffer2index: -1,
+           chain: null
+         };
+         var candidates = [NULLRESULT];
 
-               if (way.isClosed()) {
-                 nodes.pop();
-               } // ignore connecting node if closed
-               // return true if vertex appears multiple times (way is self intersecting)
+         for (var i = 0; i < buffer1.length; i++) {
+           var _item = buffer1[i];
+           var buffer2indices = equivalenceClasses[_item] || [];
+           var r = 0;
+           var c = candidates[0];
 
+           for (var jx = 0; jx < buffer2indices.length; jx++) {
+             var _j = buffer2indices[jx];
+             var s = void 0;
 
-               return nodes.indexOf(this.id) !== nodes.lastIndexOf(this.id);
+             for (s = r; s < candidates.length; s++) {
+               if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
+                 break;
+               }
              }
 
-             return false;
-           });
-         },
-         parentIntersectionWays: function parentIntersectionWays(resolver) {
-           return resolver["transient"](this, 'parentIntersectionWays', function () {
-             return resolver.parentWays(this).filter(function (parent) {
-               return (parent.tags.highway || parent.tags.waterway || parent.tags.railway || parent.tags.aeroway) && parent.geometry(resolver) === 'line';
-             });
-           });
-         },
-         isIntersection: function isIntersection(resolver) {
-           return this.parentIntersectionWays(resolver).length > 1;
-         },
-         isHighwayIntersection: function isHighwayIntersection(resolver) {
-           return resolver["transient"](this, 'isHighwayIntersection', function () {
-             return resolver.parentWays(this).filter(function (parent) {
-               return parent.tags.highway && parent.geometry(resolver) === 'line';
-             }).length > 1;
-           });
-         },
-         isOnAddressLine: function isOnAddressLine(resolver) {
-           return resolver["transient"](this, 'isOnAddressLine', function () {
-             return resolver.parentWays(this).filter(function (parent) {
-               return parent.tags.hasOwnProperty('addr:interpolation') && parent.geometry(resolver) === 'line';
-             }).length > 0;
-           });
-         },
-         asJXON: function asJXON(changeset_id) {
-           var r = {
-             node: {
-               '@id': this.osmId(),
-               '@lon': this.loc[0],
-               '@lat': this.loc[1],
-               '@version': this.version || 0,
-               tag: Object.keys(this.tags).map(function (k) {
-                 return {
-                   keyAttributes: {
-                     k: k,
-                     v: this.tags[k]
-                   }
-                 };
-               }, this)
-             }
-           };
-           if (changeset_id) r.node['@changeset'] = changeset_id;
-           return r;
-         },
-         asGeoJSON: function asGeoJSON() {
-           return {
-             type: 'Point',
-             coordinates: this.loc
-           };
-         }
-       });
+             if (s < candidates.length) {
+               var newCandidate = {
+                 buffer1index: i,
+                 buffer2index: _j,
+                 chain: candidates[s]
+               };
 
-       function actionCircularize(wayId, projection, maxAngle) {
-         maxAngle = (maxAngle || 20) * Math.PI / 180;
+               if (r === candidates.length) {
+                 candidates.push(c);
+               } else {
+                 candidates[r] = c;
+               }
 
-         var action = function action(graph, t) {
-           if (t === null || !isFinite(t)) t = 1;
-           t = Math.min(Math.max(+t, 0), 1);
-           var way = graph.entity(wayId);
-           var origNodes = {};
-           graph.childNodes(way).forEach(function (node) {
-             if (!origNodes[node.id]) origNodes[node.id] = node;
-           });
+               r = s + 1;
+               c = newCandidate;
 
-           if (!way.isConvex(graph)) {
-             graph = action.makeConvex(graph);
+               if (r === candidates.length) {
+                 break; // no point in examining further (j)s
+               }
+             }
            }
 
-           var nodes = utilArrayUniq(graph.childNodes(way));
-           var keyNodes = nodes.filter(function (n) {
-             return graph.parentWays(n).length !== 1;
-           });
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var keyPoints = keyNodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var centroid = points.length === 2 ? geoVecInterp(points[0], points[1], 0.5) : d3_polygonCentroid(points);
-           var radius = d3_median(points, function (p) {
-             return geoVecLength(centroid, p);
-           });
-           var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-           var ids, i, j, k; // we need at least two key nodes for the algorithm to work
-
-           if (!keyNodes.length) {
-             keyNodes = [nodes[0]];
-             keyPoints = [points[0]];
-           }
+           candidates[r] = c;
+         } // At this point, we know the LCS: it's in the reverse of the
+         // linked-list through .chain of candidates[candidates.length - 1].
 
-           if (keyNodes.length === 1) {
-             var index = nodes.indexOf(keyNodes[0]);
-             var oppositeIndex = Math.floor((index + nodes.length / 2) % nodes.length);
-             keyNodes.push(nodes[oppositeIndex]);
-             keyPoints.push(points[oppositeIndex]);
-           } // key points and nodes are those connected to the ways,
-           // they are projected onto the circle, in between nodes are moved
-           // to constant intervals between key nodes, extra in between nodes are
-           // added if necessary.
 
+         return candidates[candidates.length - 1];
+       } // We apply the LCS to build a 'comm'-style picture of the
+       // offsets and lengths of mismatched chunks in the input
+       // buffers. This is used by diff3MergeRegions.
 
-           for (i = 0; i < keyPoints.length; i++) {
-             var nextKeyNodeIndex = (i + 1) % keyNodes.length;
-             var startNode = keyNodes[i];
-             var endNode = keyNodes[nextKeyNodeIndex];
-             var startNodeIndex = nodes.indexOf(startNode);
-             var endNodeIndex = nodes.indexOf(endNode);
-             var numberNewPoints = -1;
-             var indexRange = endNodeIndex - startNodeIndex;
-             var nearNodes = {};
-             var inBetweenNodes = [];
-             var startAngle, endAngle, totalAngle, eachAngle;
-             var angle, loc, node, origNode;
 
-             if (indexRange < 0) {
-               indexRange += nodes.length;
-             } // position this key node
+       function diffIndices(buffer1, buffer2) {
+         var lcs = LCS(buffer1, buffer2);
+         var result = [];
+         var tail1 = buffer1.length;
+         var tail2 = buffer2.length;
 
+         for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
+           var mismatchLength1 = tail1 - candidate.buffer1index - 1;
+           var mismatchLength2 = tail2 - candidate.buffer2index - 1;
+           tail1 = candidate.buffer1index;
+           tail2 = candidate.buffer2index;
 
-             var distance = geoVecLength(centroid, keyPoints[i]) || 1e-4;
-             keyPoints[i] = [centroid[0] + (keyPoints[i][0] - centroid[0]) / distance * radius, centroid[1] + (keyPoints[i][1] - centroid[1]) / distance * radius];
-             loc = projection.invert(keyPoints[i]);
-             node = keyNodes[i];
-             origNode = origNodes[node.id];
-             node = node.move(geoVecInterp(origNode.loc, loc, t));
-             graph = graph.replace(node); // figure out the between delta angle we want to match to
+           if (mismatchLength1 || mismatchLength2) {
+             result.push({
+               buffer1: [tail1 + 1, mismatchLength1],
+               buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
+               buffer2: [tail2 + 1, mismatchLength2],
+               buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
+             });
+           }
+         }
 
-             startAngle = Math.atan2(keyPoints[i][1] - centroid[1], keyPoints[i][0] - centroid[0]);
-             endAngle = Math.atan2(keyPoints[nextKeyNodeIndex][1] - centroid[1], keyPoints[nextKeyNodeIndex][0] - centroid[0]);
-             totalAngle = endAngle - startAngle; // detects looping around -pi/pi
+         result.reverse();
+         return result;
+       } // We apply the LCS to build a JSON representation of a
+       // independently derived from O, returns a fairly complicated
+       // internal representation of merge decisions it's taken. The
+       // interested reader may wish to consult
+       //
+       // Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
+       // 'A Formal Investigation of ' In Arvind and Prasad,
+       // editors, Foundations of Software Technology and Theoretical
+       // Computer Science (FSTTCS), December 2007.
+       //
+       // (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
+       //
 
-             if (totalAngle * sign > 0) {
-               totalAngle = -sign * (2 * Math.PI - Math.abs(totalAngle));
-             }
 
-             do {
-               numberNewPoints++;
-               eachAngle = totalAngle / (indexRange + numberNewPoints);
-             } while (Math.abs(eachAngle) > maxAngle); // move existing nodes
+       function diff3MergeRegions(a, o, b) {
+         // "hunks" are array subsets where `a` or `b` are different from `o`
+         // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
+         var hunks = [];
 
+         function addHunk(h, ab) {
+           hunks.push({
+             ab: ab,
+             oStart: h.buffer1[0],
+             oLength: h.buffer1[1],
+             // length of o to remove
+             abStart: h.buffer2[0],
+             abLength: h.buffer2[1] // length of a/b to insert
+             // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])
 
-             for (j = 1; j < indexRange; j++) {
-               angle = startAngle + j * eachAngle;
-               loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]);
-               node = nodes[(j + startNodeIndex) % nodes.length];
-               origNode = origNodes[node.id];
-               nearNodes[node.id] = angle;
-               node = node.move(geoVecInterp(origNode.loc, loc, t));
-               graph = graph.replace(node);
-             } // add new in between nodes if necessary
+           });
+         }
 
+         diffIndices(o, a).forEach(function (item) {
+           return addHunk(item, 'a');
+         });
+         diffIndices(o, b).forEach(function (item) {
+           return addHunk(item, 'b');
+         });
+         hunks.sort(function (x, y) {
+           return x.oStart - y.oStart;
+         });
+         var results = [];
+         var currOffset = 0;
 
-             for (j = 0; j < numberNewPoints; j++) {
-               angle = startAngle + (indexRange + j) * eachAngle;
-               loc = projection.invert([centroid[0] + Math.cos(angle) * radius, centroid[1] + Math.sin(angle) * radius]); // choose a nearnode to use as the original
+         function advanceTo(endOffset) {
+           if (endOffset > currOffset) {
+             results.push({
+               stable: true,
+               buffer: 'o',
+               bufferStart: currOffset,
+               bufferLength: endOffset - currOffset,
+               bufferContent: o.slice(currOffset, endOffset)
+             });
+             currOffset = endOffset;
+           }
+         }
 
-               var min = Infinity;
+         while (hunks.length) {
+           var hunk = hunks.shift();
+           var regionStart = hunk.oStart;
+           var regionEnd = hunk.oStart + hunk.oLength;
+           var regionHunks = [hunk];
+           advanceTo(regionStart); // Try to pull next overlapping hunk into this region
 
-               for (var nodeId in nearNodes) {
-                 var nearAngle = nearNodes[nodeId];
-                 var dist = Math.abs(nearAngle - angle);
+           while (hunks.length) {
+             var nextHunk = hunks[0];
+             var nextHunkStart = nextHunk.oStart;
+             if (nextHunkStart > regionEnd) break; // no overlap
 
-                 if (dist < min) {
-                   min = dist;
-                   origNode = origNodes[nodeId];
-                 }
-               }
+             regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
+             regionHunks.push(hunks.shift());
+           }
 
-               node = osmNode({
-                 loc: geoVecInterp(origNode.loc, loc, t)
+           if (regionHunks.length === 1) {
+             // Only one hunk touches this region, meaning that there is no conflict here.
+             // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
+             if (hunk.abLength > 0) {
+               var buffer = hunk.ab === 'a' ? a : b;
+               results.push({
+                 stable: true,
+                 buffer: hunk.ab,
+                 bufferStart: hunk.abStart,
+                 bufferLength: hunk.abLength,
+                 bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
                });
-               graph = graph.replace(node);
-               nodes.splice(endNodeIndex + j, 0, node);
-               inBetweenNodes.push(node.id);
-             } // Check for other ways that share these keyNodes..
-             // If keyNodes are adjacent in both ways,
-             // we can add inBetweenNodes to that shared way too..
+             }
+           } else {
+             // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
+             // Effectively merge all the `a` hunks into one giant hunk, then do the
+             // same for the `b` hunks; then, correct for skew in the regions of `o`
+             // that each side changed, and report appropriate spans for the three sides.
+             var bounds = {
+               a: [a.length, -1, o.length, -1],
+               b: [b.length, -1, o.length, -1]
+             };
 
+             while (regionHunks.length) {
+               hunk = regionHunks.shift();
+               var oStart = hunk.oStart;
+               var oEnd = oStart + hunk.oLength;
+               var abStart = hunk.abStart;
+               var abEnd = abStart + hunk.abLength;
+               var _b = bounds[hunk.ab];
+               _b[0] = Math.min(abStart, _b[0]);
+               _b[1] = Math.max(abEnd, _b[1]);
+               _b[2] = Math.min(oStart, _b[2]);
+               _b[3] = Math.max(oEnd, _b[3]);
+             }
 
-             if (indexRange === 1 && inBetweenNodes.length) {
-               var startIndex1 = way.nodes.lastIndexOf(startNode.id);
-               var endIndex1 = way.nodes.lastIndexOf(endNode.id);
-               var wayDirection1 = endIndex1 - startIndex1;
+             var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
+             var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
+             var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
+             var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
+             var result = {
+               stable: false,
+               aStart: aStart,
+               aLength: aEnd - aStart,
+               aContent: a.slice(aStart, aEnd),
+               oStart: regionStart,
+               oLength: regionEnd - regionStart,
+               oContent: o.slice(regionStart, regionEnd),
+               bStart: bStart,
+               bLength: bEnd - bStart,
+               bContent: b.slice(bStart, bEnd)
+             };
+             results.push(result);
+           }
 
-               if (wayDirection1 < -1) {
-                 wayDirection1 = 1;
-               }
+           currOffset = regionEnd;
+         }
 
-               var parentWays = graph.parentWays(keyNodes[i]);
+         advanceTo(o.length);
+         return results;
+       } // Applies the output of diff3MergeRegions to actually
+       // construct the merged buffer; the returned result alternates
+       // between 'ok' and 'conflict' blocks.
+       // A "false conflict" is where `a` and `b` both change the same from `o`
 
-               for (j = 0; j < parentWays.length; j++) {
-                 var sharedWay = parentWays[j];
-                 if (sharedWay === way) continue;
 
-                 if (sharedWay.areAdjacent(startNode.id, endNode.id)) {
-                   var startIndex2 = sharedWay.nodes.lastIndexOf(startNode.id);
-                   var endIndex2 = sharedWay.nodes.lastIndexOf(endNode.id);
-                   var wayDirection2 = endIndex2 - startIndex2;
-                   var insertAt = endIndex2;
+       function diff3Merge(a, o, b, options) {
+         var defaults = {
+           excludeFalseConflicts: true,
+           stringSeparator: /\s+/
+         };
+         options = Object.assign(defaults, options);
+         var aString = typeof a === 'string';
+         var oString = typeof o === 'string';
+         var bString = typeof b === 'string';
+         if (aString) a = a.split(options.stringSeparator);
+         if (oString) o = o.split(options.stringSeparator);
+         if (bString) b = b.split(options.stringSeparator);
+         var results = [];
+         var regions = diff3MergeRegions(a, o, b);
+         var okBuffer = [];
+
+         function flushOk() {
+           if (okBuffer.length) {
+             results.push({
+               ok: okBuffer
+             });
+           }
+
+           okBuffer = [];
+         }
 
-                   if (wayDirection2 < -1) {
-                     wayDirection2 = 1;
-                   }
+         function isFalseConflict(a, b) {
+           if (a.length !== b.length) return false;
 
-                   if (wayDirection1 !== wayDirection2) {
-                     inBetweenNodes.reverse();
-                     insertAt = startIndex2;
-                   }
+           for (var i = 0; i < a.length; i++) {
+             if (a[i] !== b[i]) return false;
+           }
 
-                   for (k = 0; k < inBetweenNodes.length; k++) {
-                     sharedWay = sharedWay.addNode(inBetweenNodes[k], insertAt + k);
-                   }
+           return true;
+         }
 
-                   graph = graph.replace(sharedWay);
+         regions.forEach(function (region) {
+           if (region.stable) {
+             var _okBuffer;
+
+             (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
+           } else {
+             if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
+               var _okBuffer2;
+
+               (_okBuffer2 = okBuffer).push.apply(_okBuffer2, _toConsumableArray(region.aContent));
+             } else {
+               flushOk();
+               results.push({
+                 conflict: {
+                   a: region.aContent,
+                   aIndex: region.aStart,
+                   o: region.oContent,
+                   oIndex: region.oStart,
+                   b: region.bContent,
+                   bIndex: region.bStart
                  }
-               }
+               });
              }
-           } // update the way to have all the new nodes
+           }
+         });
+         flushOk();
+         return results;
+       }
 
+       var lodash = {exports: {}};
 
-           ids = nodes.map(function (n) {
-             return n.id;
-           });
-           ids.push(ids[0]);
-           way = way.update({
-             nodes: ids
-           });
-           graph = graph.replace(way);
-           return graph;
-         };
+       (function (module, exports) {
+         (function () {
+           /** Used as a safe reference for `undefined` in pre-ES5 environments. */
+           var undefined$1;
+           /** Used as the semantic version number. */
+
+           var VERSION = '4.17.21';
+           /** Used as the size to enable large array optimizations. */
+
+           var LARGE_ARRAY_SIZE = 200;
+           /** Error message constants. */
+
+           var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
+               FUNC_ERROR_TEXT = 'Expected a function',
+               INVALID_TEMPL_VAR_ERROR_TEXT = 'Invalid `variable` option passed into `_.template`';
+           /** Used to stand-in for `undefined` hash values. */
+
+           var HASH_UNDEFINED = '__lodash_hash_undefined__';
+           /** Used as the maximum memoize cache size. */
+
+           var MAX_MEMOIZE_SIZE = 500;
+           /** Used as the internal argument placeholder. */
+
+           var PLACEHOLDER = '__lodash_placeholder__';
+           /** Used to compose bitmasks for cloning. */
+
+           var CLONE_DEEP_FLAG = 1,
+               CLONE_FLAT_FLAG = 2,
+               CLONE_SYMBOLS_FLAG = 4;
+           /** Used to compose bitmasks for value comparisons. */
+
+           var COMPARE_PARTIAL_FLAG = 1,
+               COMPARE_UNORDERED_FLAG = 2;
+           /** Used to compose bitmasks for function metadata. */
+
+           var WRAP_BIND_FLAG = 1,
+               WRAP_BIND_KEY_FLAG = 2,
+               WRAP_CURRY_BOUND_FLAG = 4,
+               WRAP_CURRY_FLAG = 8,
+               WRAP_CURRY_RIGHT_FLAG = 16,
+               WRAP_PARTIAL_FLAG = 32,
+               WRAP_PARTIAL_RIGHT_FLAG = 64,
+               WRAP_ARY_FLAG = 128,
+               WRAP_REARG_FLAG = 256,
+               WRAP_FLIP_FLAG = 512;
+           /** Used as default options for `_.truncate`. */
+
+           var DEFAULT_TRUNC_LENGTH = 30,
+               DEFAULT_TRUNC_OMISSION = '...';
+           /** Used to detect hot functions by number of calls within a span of milliseconds. */
+
+           var HOT_COUNT = 800,
+               HOT_SPAN = 16;
+           /** Used to indicate the type of lazy iteratees. */
+
+           var LAZY_FILTER_FLAG = 1,
+               LAZY_MAP_FLAG = 2,
+               LAZY_WHILE_FLAG = 3;
+           /** Used as references for various `Number` constants. */
+
+           var INFINITY = 1 / 0,
+               MAX_SAFE_INTEGER = 9007199254740991,
+               MAX_INTEGER = 1.7976931348623157e+308,
+               NAN = 0 / 0;
+           /** Used as references for the maximum length and index of an array. */
+
+           var MAX_ARRAY_LENGTH = 4294967295,
+               MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
+               HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
+           /** Used to associate wrap methods with their bit flags. */
+
+           var wrapFlags = [['ary', WRAP_ARY_FLAG], ['bind', WRAP_BIND_FLAG], ['bindKey', WRAP_BIND_KEY_FLAG], ['curry', WRAP_CURRY_FLAG], ['curryRight', WRAP_CURRY_RIGHT_FLAG], ['flip', WRAP_FLIP_FLAG], ['partial', WRAP_PARTIAL_FLAG], ['partialRight', WRAP_PARTIAL_RIGHT_FLAG], ['rearg', WRAP_REARG_FLAG]];
+           /** `Object#toString` result references. */
+
+           var argsTag = '[object Arguments]',
+               arrayTag = '[object Array]',
+               asyncTag = '[object AsyncFunction]',
+               boolTag = '[object Boolean]',
+               dateTag = '[object Date]',
+               domExcTag = '[object DOMException]',
+               errorTag = '[object Error]',
+               funcTag = '[object Function]',
+               genTag = '[object GeneratorFunction]',
+               mapTag = '[object Map]',
+               numberTag = '[object Number]',
+               nullTag = '[object Null]',
+               objectTag = '[object Object]',
+               promiseTag = '[object Promise]',
+               proxyTag = '[object Proxy]',
+               regexpTag = '[object RegExp]',
+               setTag = '[object Set]',
+               stringTag = '[object String]',
+               symbolTag = '[object Symbol]',
+               undefinedTag = '[object Undefined]',
+               weakMapTag = '[object WeakMap]',
+               weakSetTag = '[object WeakSet]';
+           var arrayBufferTag = '[object ArrayBuffer]',
+               dataViewTag = '[object DataView]',
+               float32Tag = '[object Float32Array]',
+               float64Tag = '[object Float64Array]',
+               int8Tag = '[object Int8Array]',
+               int16Tag = '[object Int16Array]',
+               int32Tag = '[object Int32Array]',
+               uint8Tag = '[object Uint8Array]',
+               uint8ClampedTag = '[object Uint8ClampedArray]',
+               uint16Tag = '[object Uint16Array]',
+               uint32Tag = '[object Uint32Array]';
+           /** Used to match empty string literals in compiled template source. */
+
+           var reEmptyStringLeading = /\b__p \+= '';/g,
+               reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
+               reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
+           /** Used to match HTML entities and HTML characters. */
+
+           var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
+               reUnescapedHtml = /[&<>"']/g,
+               reHasEscapedHtml = RegExp(reEscapedHtml.source),
+               reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
+           /** Used to match template delimiters. */
+
+           var reEscape = /<%-([\s\S]+?)%>/g,
+               reEvaluate = /<%([\s\S]+?)%>/g,
+               reInterpolate = /<%=([\s\S]+?)%>/g;
+           /** Used to match property names within property paths. */
+
+           var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
+               reIsPlainProp = /^\w*$/,
+               rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
+           /**
+            * Used to match `RegExp`
+            * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
+            */
 
-         action.makeConvex = function (graph) {
-           var way = graph.entity(wayId);
-           var nodes = utilArrayUniq(graph.childNodes(way));
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var sign = d3_polygonArea(points) > 0 ? 1 : -1;
-           var hull = d3_polygonHull(points);
-           var i, j; // D3 convex hulls go counterclockwise..
+           var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
+               reHasRegExpChar = RegExp(reRegExpChar.source);
+           /** Used to match leading whitespace. */
 
-           if (sign === -1) {
-             nodes.reverse();
-             points.reverse();
-           }
+           var reTrimStart = /^\s+/;
+           /** Used to match a single whitespace character. */
 
-           for (i = 0; i < hull.length - 1; i++) {
-             var startIndex = points.indexOf(hull[i]);
-             var endIndex = points.indexOf(hull[i + 1]);
-             var indexRange = endIndex - startIndex;
+           var reWhitespace = /\s/;
+           /** Used to match wrap detail comments. */
 
-             if (indexRange < 0) {
-               indexRange += nodes.length;
-             } // move interior nodes to the surface of the convex hull..
+           var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
+               reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
+               reSplitDetails = /,? & /;
+           /** Used to match words composed of alphanumeric characters. */
 
+           var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
+           /**
+            * Used to validate the `validate` option in `_.template` variable.
+            *
+            * Forbids characters which could potentially change the meaning of the function argument definition:
+            * - "()," (modification of function parameters)
+            * - "=" (default value)
+            * - "[]{}" (destructuring of function parameters)
+            * - "/" (beginning of a comment)
+            * - whitespace
+            */
 
-             for (j = 1; j < indexRange; j++) {
-               var point = geoVecInterp(hull[i], hull[i + 1], j / indexRange);
-               var node = nodes[(j + startIndex) % nodes.length].move(projection.invert(point));
-               graph = graph.replace(node);
-             }
-           }
+           var reForbiddenIdentifierChars = /[()=,{}\[\]\/\s]/;
+           /** Used to match backslashes in property paths. */
 
-           return graph;
-         };
+           var reEscapeChar = /\\(\\)?/g;
+           /**
+            * Used to match
+            * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
+            */
 
-         action.disabled = function (graph) {
-           if (!graph.entity(wayId).isClosed()) {
-             return 'not_closed';
-           } //disable when already circular
+           var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
+           /** Used to match `RegExp` flags from their coerced string values. */
+
+           var reFlags = /\w*$/;
+           /** Used to detect bad signed hexadecimal string values. */
+
+           var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
+           /** Used to detect binary string values. */
+
+           var reIsBinary = /^0b[01]+$/i;
+           /** Used to detect host constructors (Safari). */
+
+           var reIsHostCtor = /^\[object .+?Constructor\]$/;
+           /** Used to detect octal string values. */
+
+           var reIsOctal = /^0o[0-7]+$/i;
+           /** Used to detect unsigned integer values. */
+
+           var reIsUint = /^(?:0|[1-9]\d*)$/;
+           /** Used to match Latin Unicode letters (excluding mathematical operators). */
+
+           var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
+           /** Used to ensure capturing order of template delimiters. */
+
+           var reNoMatch = /($^)/;
+           /** Used to match unescaped characters in compiled string literals. */
+
+           var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
+           /** Used to compose unicode character classes. */
+
+           var rsAstralRange = "\\ud800-\\udfff",
+               rsComboMarksRange = "\\u0300-\\u036f",
+               reComboHalfMarksRange = "\\ufe20-\\ufe2f",
+               rsComboSymbolsRange = "\\u20d0-\\u20ff",
+               rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
+               rsDingbatRange = "\\u2700-\\u27bf",
+               rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
+               rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
+               rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
+               rsPunctuationRange = "\\u2000-\\u206f",
+               rsSpaceRange = " \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000",
+               rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
+               rsVarRange = "\\ufe0e\\ufe0f",
+               rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
+           /** Used to compose unicode capture groups. */
+
+           var rsApos = "['\u2019]",
+               rsAstral = '[' + rsAstralRange + ']',
+               rsBreak = '[' + rsBreakRange + ']',
+               rsCombo = '[' + rsComboRange + ']',
+               rsDigits = '\\d+',
+               rsDingbat = '[' + rsDingbatRange + ']',
+               rsLower = '[' + rsLowerRange + ']',
+               rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
+               rsFitz = "\\ud83c[\\udffb-\\udfff]",
+               rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
+               rsNonAstral = '[^' + rsAstralRange + ']',
+               rsRegional = "(?:\\ud83c[\\udde6-\\uddff]){2}",
+               rsSurrPair = "[\\ud800-\\udbff][\\udc00-\\udfff]",
+               rsUpper = '[' + rsUpperRange + ']',
+               rsZWJ = "\\u200d";
+           /** Used to compose unicode regexes. */
+
+           var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
+               rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
+               rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
+               rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
+               reOptMod = rsModifier + '?',
+               rsOptVar = '[' + rsVarRange + ']?',
+               rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
+               rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])',
+               rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])',
+               rsSeq = rsOptVar + reOptMod + rsOptJoin,
+               rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
+               rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
+           /** Used to match apostrophes. */
+
+           var reApos = RegExp(rsApos, 'g');
+           /**
+            * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
+            * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
+            */
 
+           var reComboMark = RegExp(rsCombo, 'g');
+           /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
+
+           var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
+           /** Used to match complex or compound words. */
+
+           var reUnicodeWord = RegExp([rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')', rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')', rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower, rsUpper + '+' + rsOptContrUpper, rsOrdUpper, rsOrdLower, rsDigits, rsEmoji].join('|'), 'g');
+           /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
+
+           var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
+           /** Used to detect strings that need a more robust regexp to match words. */
+
+           var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
+           /** Used to assign default `context` object properties. */
+
+           var contextProps = ['Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array', 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object', 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array', 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap', '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'];
+           /** Used to make template sourceURLs easier to identify. */
+
+           var templateCounter = -1;
+           /** Used to identify `toStringTag` values of typed arrays. */
+
+           var typedArrayTags = {};
+           typedArrayTags[float32Tag] = typedArrayTags[float64Tag] = typedArrayTags[int8Tag] = typedArrayTags[int16Tag] = typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] = typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] = typedArrayTags[uint32Tag] = true;
+           typedArrayTags[argsTag] = typedArrayTags[arrayTag] = typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] = typedArrayTags[dataViewTag] = typedArrayTags[dateTag] = typedArrayTags[errorTag] = typedArrayTags[funcTag] = typedArrayTags[mapTag] = typedArrayTags[numberTag] = typedArrayTags[objectTag] = typedArrayTags[regexpTag] = typedArrayTags[setTag] = typedArrayTags[stringTag] = typedArrayTags[weakMapTag] = false;
+           /** Used to identify `toStringTag` values supported by `_.clone`. */
+
+           var cloneableTags = {};
+           cloneableTags[argsTag] = cloneableTags[arrayTag] = cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] = cloneableTags[boolTag] = cloneableTags[dateTag] = cloneableTags[float32Tag] = cloneableTags[float64Tag] = cloneableTags[int8Tag] = cloneableTags[int16Tag] = cloneableTags[int32Tag] = cloneableTags[mapTag] = cloneableTags[numberTag] = cloneableTags[objectTag] = cloneableTags[regexpTag] = cloneableTags[setTag] = cloneableTags[stringTag] = cloneableTags[symbolTag] = cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] = cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
+           cloneableTags[errorTag] = cloneableTags[funcTag] = cloneableTags[weakMapTag] = false;
+           /** Used to map Latin Unicode letters to basic Latin letters. */
+
+           var deburredLetters = {
+             // Latin-1 Supplement block.
+             '\xc0': 'A',
+             '\xc1': 'A',
+             '\xc2': 'A',
+             '\xc3': 'A',
+             '\xc4': 'A',
+             '\xc5': 'A',
+             '\xe0': 'a',
+             '\xe1': 'a',
+             '\xe2': 'a',
+             '\xe3': 'a',
+             '\xe4': 'a',
+             '\xe5': 'a',
+             '\xc7': 'C',
+             '\xe7': 'c',
+             '\xd0': 'D',
+             '\xf0': 'd',
+             '\xc8': 'E',
+             '\xc9': 'E',
+             '\xca': 'E',
+             '\xcb': 'E',
+             '\xe8': 'e',
+             '\xe9': 'e',
+             '\xea': 'e',
+             '\xeb': 'e',
+             '\xcc': 'I',
+             '\xcd': 'I',
+             '\xce': 'I',
+             '\xcf': 'I',
+             '\xec': 'i',
+             '\xed': 'i',
+             '\xee': 'i',
+             '\xef': 'i',
+             '\xd1': 'N',
+             '\xf1': 'n',
+             '\xd2': 'O',
+             '\xd3': 'O',
+             '\xd4': 'O',
+             '\xd5': 'O',
+             '\xd6': 'O',
+             '\xd8': 'O',
+             '\xf2': 'o',
+             '\xf3': 'o',
+             '\xf4': 'o',
+             '\xf5': 'o',
+             '\xf6': 'o',
+             '\xf8': 'o',
+             '\xd9': 'U',
+             '\xda': 'U',
+             '\xdb': 'U',
+             '\xdc': 'U',
+             '\xf9': 'u',
+             '\xfa': 'u',
+             '\xfb': 'u',
+             '\xfc': 'u',
+             '\xdd': 'Y',
+             '\xfd': 'y',
+             '\xff': 'y',
+             '\xc6': 'Ae',
+             '\xe6': 'ae',
+             '\xde': 'Th',
+             '\xfe': 'th',
+             '\xdf': 'ss',
+             // Latin Extended-A block.
+             "\u0100": 'A',
+             "\u0102": 'A',
+             "\u0104": 'A',
+             "\u0101": 'a',
+             "\u0103": 'a',
+             "\u0105": 'a',
+             "\u0106": 'C',
+             "\u0108": 'C',
+             "\u010A": 'C',
+             "\u010C": 'C',
+             "\u0107": 'c',
+             "\u0109": 'c',
+             "\u010B": 'c',
+             "\u010D": 'c',
+             "\u010E": 'D',
+             "\u0110": 'D',
+             "\u010F": 'd',
+             "\u0111": 'd',
+             "\u0112": 'E',
+             "\u0114": 'E',
+             "\u0116": 'E',
+             "\u0118": 'E',
+             "\u011A": 'E',
+             "\u0113": 'e',
+             "\u0115": 'e',
+             "\u0117": 'e',
+             "\u0119": 'e',
+             "\u011B": 'e',
+             "\u011C": 'G',
+             "\u011E": 'G',
+             "\u0120": 'G',
+             "\u0122": 'G',
+             "\u011D": 'g',
+             "\u011F": 'g',
+             "\u0121": 'g',
+             "\u0123": 'g',
+             "\u0124": 'H',
+             "\u0126": 'H',
+             "\u0125": 'h',
+             "\u0127": 'h',
+             "\u0128": 'I',
+             "\u012A": 'I',
+             "\u012C": 'I',
+             "\u012E": 'I',
+             "\u0130": 'I',
+             "\u0129": 'i',
+             "\u012B": 'i',
+             "\u012D": 'i',
+             "\u012F": 'i',
+             "\u0131": 'i',
+             "\u0134": 'J',
+             "\u0135": 'j',
+             "\u0136": 'K',
+             "\u0137": 'k',
+             "\u0138": 'k',
+             "\u0139": 'L',
+             "\u013B": 'L',
+             "\u013D": 'L',
+             "\u013F": 'L',
+             "\u0141": 'L',
+             "\u013A": 'l',
+             "\u013C": 'l',
+             "\u013E": 'l',
+             "\u0140": 'l',
+             "\u0142": 'l',
+             "\u0143": 'N',
+             "\u0145": 'N',
+             "\u0147": 'N',
+             "\u014A": 'N',
+             "\u0144": 'n',
+             "\u0146": 'n',
+             "\u0148": 'n',
+             "\u014B": 'n',
+             "\u014C": 'O',
+             "\u014E": 'O',
+             "\u0150": 'O',
+             "\u014D": 'o',
+             "\u014F": 'o',
+             "\u0151": 'o',
+             "\u0154": 'R',
+             "\u0156": 'R',
+             "\u0158": 'R',
+             "\u0155": 'r',
+             "\u0157": 'r',
+             "\u0159": 'r',
+             "\u015A": 'S',
+             "\u015C": 'S',
+             "\u015E": 'S',
+             "\u0160": 'S',
+             "\u015B": 's',
+             "\u015D": 's',
+             "\u015F": 's',
+             "\u0161": 's',
+             "\u0162": 'T',
+             "\u0164": 'T',
+             "\u0166": 'T',
+             "\u0163": 't',
+             "\u0165": 't',
+             "\u0167": 't',
+             "\u0168": 'U',
+             "\u016A": 'U',
+             "\u016C": 'U',
+             "\u016E": 'U',
+             "\u0170": 'U',
+             "\u0172": 'U',
+             "\u0169": 'u',
+             "\u016B": 'u',
+             "\u016D": 'u',
+             "\u016F": 'u',
+             "\u0171": 'u',
+             "\u0173": 'u',
+             "\u0174": 'W',
+             "\u0175": 'w',
+             "\u0176": 'Y',
+             "\u0177": 'y',
+             "\u0178": 'Y',
+             "\u0179": 'Z',
+             "\u017B": 'Z',
+             "\u017D": 'Z',
+             "\u017A": 'z',
+             "\u017C": 'z',
+             "\u017E": 'z',
+             "\u0132": 'IJ',
+             "\u0133": 'ij',
+             "\u0152": 'Oe',
+             "\u0153": 'oe',
+             "\u0149": "'n",
+             "\u017F": 's'
+           };
+           /** Used to map characters to HTML entities. */
+
+           var htmlEscapes = {
+             '&': '&amp;',
+             '<': '&lt;',
+             '>': '&gt;',
+             '"': '&quot;',
+             "'": '&#39;'
+           };
+           /** Used to map HTML entities to characters. */
+
+           var htmlUnescapes = {
+             '&amp;': '&',
+             '&lt;': '<',
+             '&gt;': '>',
+             '&quot;': '"',
+             '&#39;': "'"
+           };
+           /** Used to escape characters for inclusion in compiled string literals. */
+
+           var stringEscapes = {
+             '\\': '\\',
+             "'": "'",
+             '\n': 'n',
+             '\r': 'r',
+             "\u2028": 'u2028',
+             "\u2029": 'u2029'
+           };
+           /** Built-in method references without a dependency on `root`. */
 
-           var way = graph.entity(wayId);
-           var nodes = utilArrayUniq(graph.childNodes(way));
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var hull = d3_polygonHull(points);
-           var epsilonAngle = Math.PI / 180;
+           var freeParseFloat = parseFloat,
+               freeParseInt = parseInt;
+           /** Detect free variable `global` from Node.js. */
 
-           if (hull.length !== points.length || hull.length < 3) {
-             return false;
-           }
+           var freeGlobal = _typeof(commonjsGlobal) == 'object' && commonjsGlobal && commonjsGlobal.Object === Object && commonjsGlobal;
+           /** Detect free variable `self`. */
 
-           var centroid = d3_polygonCentroid(points);
-           var radius = geoVecLengthSquare(centroid, points[0]);
-           var i, actualPoint; // compare distances between centroid and points
+           var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
+           /** Used as a reference to the global object. */
 
-           for (i = 0; i < hull.length; i++) {
-             actualPoint = hull[i];
-             var actualDist = geoVecLengthSquare(actualPoint, centroid);
-             var diff = Math.abs(actualDist - radius); //compare distances with epsilon-error (5%)
+           var root = freeGlobal || freeSelf || Function('return this')();
+           /** Detect free variable `exports`. */
 
-             if (diff > 0.05 * radius) {
-               return false;
-             }
-           } //check if central angles are smaller than maxAngle
+           var freeExports = exports && !exports.nodeType && exports;
+           /** Detect free variable `module`. */
 
+           var freeModule = freeExports && 'object' == 'object' && module && !module.nodeType && module;
+           /** Detect the popular CommonJS extension `module.exports`. */
 
-           for (i = 0; i < hull.length; i++) {
-             actualPoint = hull[i];
-             var nextPoint = hull[(i + 1) % hull.length];
-             var startAngle = Math.atan2(actualPoint[1] - centroid[1], actualPoint[0] - centroid[0]);
-             var endAngle = Math.atan2(nextPoint[1] - centroid[1], nextPoint[0] - centroid[0]);
-             var angle = endAngle - startAngle;
+           var moduleExports = freeModule && freeModule.exports === freeExports;
+           /** Detect free variable `process` from Node.js. */
 
-             if (angle < 0) {
-               angle = -angle;
-             }
+           var freeProcess = moduleExports && freeGlobal.process;
+           /** Used to access faster Node.js helpers. */
 
-             if (angle > Math.PI) {
-               angle = 2 * Math.PI - angle;
-             }
+           var nodeUtil = function () {
+             try {
+               // Use `util.types` for Node.js 10+.
+               var types = freeModule && freeModule.require && freeModule.require('util').types;
 
-             if (angle > maxAngle + epsilonAngle) {
-               return false;
-             }
-           }
+               if (types) {
+                 return types;
+               } // Legacy `process.binding('util')` for Node.js < 10.
 
-           return 'already_circular';
-         };
 
-         action.transitionable = true;
-         return action;
-       }
+               return freeProcess && freeProcess.binding && freeProcess.binding('util');
+             } catch (e) {}
+           }();
+           /* Node.js helper references. */
 
-       function actionDeleteWay(wayID) {
-         function canDeleteNode(node, graph) {
-           // don't delete nodes still attached to ways or relations
-           if (graph.parentWays(node).length || graph.parentRelations(node).length) return false;
-           var geometries = osmNodeGeometriesForTags(node.tags); // don't delete if this node can be a standalone point
 
-           if (geometries.point) return false; // delete if this node only be a vertex
+           var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
+               nodeIsDate = nodeUtil && nodeUtil.isDate,
+               nodeIsMap = nodeUtil && nodeUtil.isMap,
+               nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
+               nodeIsSet = nodeUtil && nodeUtil.isSet,
+               nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
+           /*--------------------------------------------------------------------------*/
 
-           if (geometries.vertex) return true; // iD doesn't know if this should be a point or vertex,
-           // so only delete if there are no interesting tags
+           /**
+            * A faster alternative to `Function#apply`, this function invokes `func`
+            * with the `this` binding of `thisArg` and the arguments of `args`.
+            *
+            * @private
+            * @param {Function} func The function to invoke.
+            * @param {*} thisArg The `this` binding of `func`.
+            * @param {Array} args The arguments to invoke `func` with.
+            * @returns {*} Returns the result of `func`.
+            */
 
-           return !node.hasInterestingTags();
-         }
+           function apply(func, thisArg, args) {
+             switch (args.length) {
+               case 0:
+                 return func.call(thisArg);
 
-         var action = function action(graph) {
-           var way = graph.entity(wayID);
-           graph.parentRelations(way).forEach(function (parent) {
-             parent = parent.removeMembersWithID(wayID);
-             graph = graph.replace(parent);
+               case 1:
+                 return func.call(thisArg, args[0]);
 
-             if (parent.isDegenerate()) {
-               graph = actionDeleteRelation(parent.id)(graph);
-             }
-           });
-           new Set(way.nodes).forEach(function (nodeID) {
-             graph = graph.replace(way.removeNode(nodeID));
-             var node = graph.entity(nodeID);
+               case 2:
+                 return func.call(thisArg, args[0], args[1]);
 
-             if (canDeleteNode(node, graph)) {
-               graph = graph.remove(node);
+               case 3:
+                 return func.call(thisArg, args[0], args[1], args[2]);
              }
-           });
-           return graph.remove(way);
-         };
 
-         return action;
-       }
+             return func.apply(thisArg, args);
+           }
+           /**
+            * A specialized version of `baseAggregator` for arrays.
+            *
+            * @private
+            * @param {Array} [array] The array to iterate over.
+            * @param {Function} setter The function to set `accumulator` values.
+            * @param {Function} iteratee The iteratee to transform keys.
+            * @param {Object} accumulator The initial aggregated object.
+            * @returns {Function} Returns `accumulator`.
+            */
 
-       function actionDeleteMultiple(ids) {
-         var actions = {
-           way: actionDeleteWay,
-           node: actionDeleteNode,
-           relation: actionDeleteRelation
-         };
 
-         var action = function action(graph) {
-           ids.forEach(function (id) {
-             if (graph.hasEntity(id)) {
-               // It may have been deleted already.
-               graph = actions[graph.entity(id).type](id)(graph);
+           function arrayAggregator(array, setter, iteratee, accumulator) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
+
+             while (++index < length) {
+               var value = array[index];
+               setter(accumulator, value, iteratee(value), array);
              }
-           });
-           return graph;
-         };
 
-         return action;
-       }
+             return accumulator;
+           }
+           /**
+            * A specialized version of `_.forEach` for arrays without support for
+            * iteratee shorthands.
+            *
+            * @private
+            * @param {Array} [array] The array to iterate over.
+            * @param {Function} iteratee The function invoked per iteration.
+            * @returns {Array} Returns `array`.
+            */
 
-       function actionDeleteRelation(relationID, allowUntaggedMembers) {
-         function canDeleteEntity(entity, graph) {
-           return !graph.parentWays(entity).length && !graph.parentRelations(entity).length && !entity.hasInterestingTags() && !allowUntaggedMembers;
-         }
 
-         var action = function action(graph) {
-           var relation = graph.entity(relationID);
-           graph.parentRelations(relation).forEach(function (parent) {
-             parent = parent.removeMembersWithID(relationID);
-             graph = graph.replace(parent);
+           function arrayEach(array, iteratee) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
 
-             if (parent.isDegenerate()) {
-               graph = actionDeleteRelation(parent.id)(graph);
+             while (++index < length) {
+               if (iteratee(array[index], index, array) === false) {
+                 break;
+               }
              }
-           });
-           var memberIDs = utilArrayUniq(relation.members.map(function (m) {
-             return m.id;
-           }));
-           memberIDs.forEach(function (memberID) {
-             graph = graph.replace(relation.removeMembersWithID(memberID));
-             var entity = graph.entity(memberID);
 
-             if (canDeleteEntity(entity, graph)) {
-               graph = actionDeleteMultiple([memberID])(graph);
-             }
-           });
-           return graph.remove(relation);
-         };
+             return array;
+           }
+           /**
+            * A specialized version of `_.forEachRight` for arrays without support for
+            * iteratee shorthands.
+            *
+            * @private
+            * @param {Array} [array] The array to iterate over.
+            * @param {Function} iteratee The function invoked per iteration.
+            * @returns {Array} Returns `array`.
+            */
 
-         return action;
-       }
 
-       function actionDeleteNode(nodeId) {
-         var action = function action(graph) {
-           var node = graph.entity(nodeId);
-           graph.parentWays(node).forEach(function (parent) {
-             parent = parent.removeNode(nodeId);
-             graph = graph.replace(parent);
+           function arrayEachRight(array, iteratee) {
+             var length = array == null ? 0 : array.length;
 
-             if (parent.isDegenerate()) {
-               graph = actionDeleteWay(parent.id)(graph);
+             while (length--) {
+               if (iteratee(array[length], length, array) === false) {
+                 break;
+               }
              }
-           });
-           graph.parentRelations(node).forEach(function (parent) {
-             parent = parent.removeMembersWithID(nodeId);
-             graph = graph.replace(parent);
 
-             if (parent.isDegenerate()) {
-               graph = actionDeleteRelation(parent.id)(graph);
-             }
-           });
-           return graph.remove(node);
-         };
+             return array;
+           }
+           /**
+            * A specialized version of `_.every` for arrays without support for
+            * iteratee shorthands.
+            *
+            * @private
+            * @param {Array} [array] The array to iterate over.
+            * @param {Function} predicate The function invoked per iteration.
+            * @returns {boolean} Returns `true` if all elements pass the predicate check,
+            *  else `false`.
+            */
 
-         return action;
-       }
 
-       //
-       // First choose a node to be the survivor, with preference given
-       // to an existing (not new) node.
-       //
-       // Tags and relation memberships of of non-surviving nodes are merged
-       // to the survivor.
-       //
-       // This is the inverse of `iD.actionDisconnect`.
-       //
-       // Reference:
-       //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeNodesAction.as
-       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/MergeNodesAction.java
-       //
+           function arrayEvery(array, predicate) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
 
-       function actionConnect(nodeIDs) {
-         var action = function action(graph) {
-           var survivor;
-           var node;
-           var parents;
-           var i, j; // Choose a survivor node, prefer an existing (not new) node - #4974
+             while (++index < length) {
+               if (!predicate(array[index], index, array)) {
+                 return false;
+               }
+             }
 
-           for (i = 0; i < nodeIDs.length; i++) {
-             survivor = graph.entity(nodeIDs[i]);
-             if (survivor.version) break; // found one
-           } // Replace all non-surviving nodes with the survivor and merge tags.
+             return true;
+           }
+           /**
+            * A specialized version of `_.filter` for arrays without support for
+            * iteratee shorthands.
+            *
+            * @private
+            * @param {Array} [array] The array to iterate over.
+            * @param {Function} predicate The function invoked per iteration.
+            * @returns {Array} Returns the new filtered array.
+            */
 
 
-           for (i = 0; i < nodeIDs.length; i++) {
-             node = graph.entity(nodeIDs[i]);
-             if (node.id === survivor.id) continue;
-             parents = graph.parentWays(node);
+           function arrayFilter(array, predicate) {
+             var index = -1,
+                 length = array == null ? 0 : array.length,
+                 resIndex = 0,
+                 result = [];
 
-             for (j = 0; j < parents.length; j++) {
-               graph = graph.replace(parents[j].replaceNode(node.id, survivor.id));
+             while (++index < length) {
+               var value = array[index];
+
+               if (predicate(value, index, array)) {
+                 result[resIndex++] = value;
+               }
              }
 
-             parents = graph.parentRelations(node);
+             return result;
+           }
+           /**
+            * A specialized version of `_.includes` for arrays without support for
+            * specifying an index to search from.
+            *
+            * @private
+            * @param {Array} [array] The array to inspect.
+            * @param {*} target The value to search for.
+            * @returns {boolean} Returns `true` if `target` is found, else `false`.
+            */
 
-             for (j = 0; j < parents.length; j++) {
-               graph = graph.replace(parents[j].replaceMember(node, survivor));
-             }
 
-             survivor = survivor.mergeTags(node.tags);
-             graph = actionDeleteNode(node.id)(graph);
+           function arrayIncludes(array, value) {
+             var length = array == null ? 0 : array.length;
+             return !!length && baseIndexOf(array, value, 0) > -1;
            }
+           /**
+            * This function is like `arrayIncludes` except that it accepts a comparator.
+            *
+            * @private
+            * @param {Array} [array] The array to inspect.
+            * @param {*} target The value to search for.
+            * @param {Function} comparator The comparator invoked per element.
+            * @returns {boolean} Returns `true` if `target` is found, else `false`.
+            */
 
-           graph = graph.replace(survivor); // find and delete any degenerate ways created by connecting adjacent vertices
 
-           parents = graph.parentWays(survivor);
+           function arrayIncludesWith(array, value, comparator) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
 
-           for (i = 0; i < parents.length; i++) {
-             if (parents[i].isDegenerate()) {
-               graph = actionDeleteWay(parents[i].id)(graph);
+             while (++index < length) {
+               if (comparator(value, array[index])) {
+                 return true;
+               }
              }
-           }
 
-           return graph;
-         };
+             return false;
+           }
+           /**
+            * A specialized version of `_.map` for arrays without support for iteratee
+            * shorthands.
+            *
+            * @private
+            * @param {Array} [array] The array to iterate over.
+            * @param {Function} iteratee The function invoked per iteration.
+            * @returns {Array} Returns the new mapped array.
+            */
 
-         action.disabled = function (graph) {
-           var seen = {};
-           var restrictionIDs = [];
-           var survivor;
-           var node, way;
-           var relations, relation, role;
-           var i, j, k; // Choose a survivor node, prefer an existing (not new) node - #4974
 
-           for (i = 0; i < nodeIDs.length; i++) {
-             survivor = graph.entity(nodeIDs[i]);
-             if (survivor.version) break; // found one
-           } // 1. disable if the nodes being connected have conflicting relation roles
+           function arrayMap(array, iteratee) {
+             var index = -1,
+                 length = array == null ? 0 : array.length,
+                 result = Array(length);
 
+             while (++index < length) {
+               result[index] = iteratee(array[index], index, array);
+             }
 
-           for (i = 0; i < nodeIDs.length; i++) {
-             node = graph.entity(nodeIDs[i]);
-             relations = graph.parentRelations(node);
+             return result;
+           }
+           /**
+            * Appends the elements of `values` to `array`.
+            *
+            * @private
+            * @param {Array} array The array to modify.
+            * @param {Array} values The values to append.
+            * @returns {Array} Returns `array`.
+            */
 
-             for (j = 0; j < relations.length; j++) {
-               relation = relations[j];
-               role = relation.memberById(node.id).role || ''; // if this node is a via node in a restriction, remember for later
 
-               if (relation.hasFromViaTo()) {
-                 restrictionIDs.push(relation.id);
-               }
+           function arrayPush(array, values) {
+             var index = -1,
+                 length = values.length,
+                 offset = array.length;
 
-               if (seen[relation.id] !== undefined && seen[relation.id] !== role) {
-                 return 'relation';
-               } else {
-                 seen[relation.id] = role;
-               }
+             while (++index < length) {
+               array[offset + index] = values[index];
              }
-           } // gather restrictions for parent ways
-
 
-           for (i = 0; i < nodeIDs.length; i++) {
-             node = graph.entity(nodeIDs[i]);
-             var parents = graph.parentWays(node);
+             return array;
+           }
+           /**
+            * A specialized version of `_.reduce` for arrays without support for
+            * iteratee shorthands.
+            *
+            * @private
+            * @param {Array} [array] The array to iterate over.
+            * @param {Function} iteratee The function invoked per iteration.
+            * @param {*} [accumulator] The initial value.
+            * @param {boolean} [initAccum] Specify using the first element of `array` as
+            *  the initial value.
+            * @returns {*} Returns the accumulated value.
+            */
 
-             for (j = 0; j < parents.length; j++) {
-               var parent = parents[j];
-               relations = graph.parentRelations(parent);
 
-               for (k = 0; k < relations.length; k++) {
-                 relation = relations[k];
+           function arrayReduce(array, iteratee, accumulator, initAccum) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
 
-                 if (relation.hasFromViaTo()) {
-                   restrictionIDs.push(relation.id);
-                 }
-               }
+             if (initAccum && length) {
+               accumulator = array[++index];
              }
-           } // test restrictions
 
+             while (++index < length) {
+               accumulator = iteratee(accumulator, array[index], index, array);
+             }
 
-           restrictionIDs = utilArrayUniq(restrictionIDs);
+             return accumulator;
+           }
+           /**
+            * A specialized version of `_.reduceRight` for arrays without support for
+            * iteratee shorthands.
+            *
+            * @private
+            * @param {Array} [array] The array to iterate over.
+            * @param {Function} iteratee The function invoked per iteration.
+            * @param {*} [accumulator] The initial value.
+            * @param {boolean} [initAccum] Specify using the last element of `array` as
+            *  the initial value.
+            * @returns {*} Returns the accumulated value.
+            */
 
-           for (i = 0; i < restrictionIDs.length; i++) {
-             relation = graph.entity(restrictionIDs[i]);
-             if (!relation.isComplete(graph)) continue;
-             var memberWays = relation.members.filter(function (m) {
-               return m.type === 'way';
-             }).map(function (m) {
-               return graph.entity(m.id);
-             });
-             memberWays = utilArrayUniq(memberWays);
-             var f = relation.memberByRole('from');
-             var t = relation.memberByRole('to');
-             var isUturn = f.id === t.id; // 2a. disable if connection would damage a restriction
-             // (a key node is a node at the junction of ways)
 
-             var nodes = {
-               from: [],
-               via: [],
-               to: [],
-               keyfrom: [],
-               keyto: []
-             };
+           function arrayReduceRight(array, iteratee, accumulator, initAccum) {
+             var length = array == null ? 0 : array.length;
 
-             for (j = 0; j < relation.members.length; j++) {
-               collectNodes(relation.members[j], nodes);
+             if (initAccum && length) {
+               accumulator = array[--length];
              }
 
-             nodes.keyfrom = utilArrayUniq(nodes.keyfrom.filter(hasDuplicates));
-             nodes.keyto = utilArrayUniq(nodes.keyto.filter(hasDuplicates));
-             var filter = keyNodeFilter(nodes.keyfrom, nodes.keyto);
-             nodes.from = nodes.from.filter(filter);
-             nodes.via = nodes.via.filter(filter);
-             nodes.to = nodes.to.filter(filter);
-             var connectFrom = false;
-             var connectVia = false;
-             var connectTo = false;
-             var connectKeyFrom = false;
-             var connectKeyTo = false;
-
-             for (j = 0; j < nodeIDs.length; j++) {
-               var n = nodeIDs[j];
-
-               if (nodes.from.indexOf(n) !== -1) {
-                 connectFrom = true;
-               }
+             while (length--) {
+               accumulator = iteratee(accumulator, array[length], length, array);
+             }
 
-               if (nodes.via.indexOf(n) !== -1) {
-                 connectVia = true;
-               }
+             return accumulator;
+           }
+           /**
+            * A specialized version of `_.some` for arrays without support for iteratee
+            * shorthands.
+            *
+            * @private
+            * @param {Array} [array] The array to iterate over.
+            * @param {Function} predicate The function invoked per iteration.
+            * @returns {boolean} Returns `true` if any element passes the predicate check,
+            *  else `false`.
+            */
 
-               if (nodes.to.indexOf(n) !== -1) {
-                 connectTo = true;
-               }
 
-               if (nodes.keyfrom.indexOf(n) !== -1) {
-                 connectKeyFrom = true;
-               }
+           function arraySome(array, predicate) {
+             var index = -1,
+                 length = array == null ? 0 : array.length;
 
-               if (nodes.keyto.indexOf(n) !== -1) {
-                 connectKeyTo = true;
+             while (++index < length) {
+               if (predicate(array[index], index, array)) {
+                 return true;
                }
              }
 
-             if (connectFrom && connectTo && !isUturn) {
-               return 'restriction';
-             }
-
-             if (connectFrom && connectVia) {
-               return 'restriction';
-             }
+             return false;
+           }
+           /**
+            * Gets the size of an ASCII `string`.
+            *
+            * @private
+            * @param {string} string The string inspect.
+            * @returns {number} Returns the string size.
+            */
 
-             if (connectTo && connectVia) {
-               return 'restriction';
-             } // connecting to a key node -
-             // if both nodes are on a member way (i.e. part of the turn restriction),
-             // the connecting node must be adjacent to the key node.
 
+           var asciiSize = baseProperty('length');
+           /**
+            * Converts an ASCII `string` to an array.
+            *
+            * @private
+            * @param {string} string The string to convert.
+            * @returns {Array} Returns the converted array.
+            */
 
-             if (connectKeyFrom || connectKeyTo) {
-               if (nodeIDs.length !== 2) {
-                 return 'restriction';
-               }
+           function asciiToArray(string) {
+             return string.split('');
+           }
+           /**
+            * Splits an ASCII `string` into an array of its words.
+            *
+            * @private
+            * @param {string} The string to inspect.
+            * @returns {Array} Returns the words of `string`.
+            */
 
-               var n0 = null;
-               var n1 = null;
 
-               for (j = 0; j < memberWays.length; j++) {
-                 way = memberWays[j];
+           function asciiWords(string) {
+             return string.match(reAsciiWord) || [];
+           }
+           /**
+            * The base implementation of methods like `_.findKey` and `_.findLastKey`,
+            * without support for iteratee shorthands, which iterates over `collection`
+            * using `eachFunc`.
+            *
+            * @private
+            * @param {Array|Object} collection The collection to inspect.
+            * @param {Function} predicate The function invoked per iteration.
+            * @param {Function} eachFunc The function to iterate over `collection`.
+            * @returns {*} Returns the found element or its key, else `undefined`.
+            */
 
-                 if (way.contains(nodeIDs[0])) {
-                   n0 = nodeIDs[0];
-                 }
 
-                 if (way.contains(nodeIDs[1])) {
-                   n1 = nodeIDs[1];
-                 }
+           function baseFindKey(collection, predicate, eachFunc) {
+             var result;
+             eachFunc(collection, function (value, key, collection) {
+               if (predicate(value, key, collection)) {
+                 result = key;
+                 return false;
                }
+             });
+             return result;
+           }
+           /**
+            * The base implementation of `_.findIndex` and `_.findLastIndex` without
+            * support for iteratee shorthands.
+            *
+            * @private
+            * @param {Array} array The array to inspect.
+            * @param {Function} predicate The function invoked per iteration.
+            * @param {number} fromIndex The index to search from.
+            * @param {boolean} [fromRight] Specify iterating from right to left.
+            * @returns {number} Returns the index of the matched value, else `-1`.
+            */
 
-               if (n0 && n1) {
-                 // both nodes are part of the restriction
-                 var ok = false;
-
-                 for (j = 0; j < memberWays.length; j++) {
-                   way = memberWays[j];
 
-                   if (way.areAdjacent(n0, n1)) {
-                     ok = true;
-                     break;
-                   }
-                 }
+           function baseFindIndex(array, predicate, fromIndex, fromRight) {
+             var length = array.length,
+                 index = fromIndex + (fromRight ? 1 : -1);
 
-                 if (!ok) {
-                   return 'restriction';
-                 }
+             while (fromRight ? index-- : ++index < length) {
+               if (predicate(array[index], index, array)) {
+                 return index;
                }
-             } // 2b. disable if nodes being connected will destroy a member way in a restriction
-             // (to test, make a copy and try actually connecting the nodes)
+             }
+
+             return -1;
+           }
+           /**
+            * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
+            *
+            * @private
+            * @param {Array} array The array to inspect.
+            * @param {*} value The value to search for.
+            * @param {number} fromIndex The index to search from.
+            * @returns {number} Returns the index of the matched value, else `-1`.
+            */
 
 
-             for (j = 0; j < memberWays.length; j++) {
-               way = memberWays[j].update({}); // make copy
+           function baseIndexOf(array, value, fromIndex) {
+             return value === value ? strictIndexOf(array, value, fromIndex) : baseFindIndex(array, baseIsNaN, fromIndex);
+           }
+           /**
+            * This function is like `baseIndexOf` except that it accepts a comparator.
+            *
+            * @private
+            * @param {Array} array The array to inspect.
+            * @param {*} value The value to search for.
+            * @param {number} fromIndex The index to search from.
+            * @param {Function} comparator The comparator invoked per element.
+            * @returns {number} Returns the index of the matched value, else `-1`.
+            */
 
-               for (k = 0; k < nodeIDs.length; k++) {
-                 if (nodeIDs[k] === survivor.id) continue;
 
-                 if (way.areAdjacent(nodeIDs[k], survivor.id)) {
-                   way = way.removeNode(nodeIDs[k]);
-                 } else {
-                   way = way.replaceNode(nodeIDs[k], survivor.id);
-                 }
-               }
+           function baseIndexOfWith(array, value, fromIndex, comparator) {
+             var index = fromIndex - 1,
+                 length = array.length;
 
-               if (way.isDegenerate()) {
-                 return 'restriction';
+             while (++index < length) {
+               if (comparator(array[index], value)) {
+                 return index;
                }
              }
+
+             return -1;
            }
+           /**
+            * The base implementation of `_.isNaN` without support for number objects.
+            *
+            * @private
+            * @param {*} value The value to check.
+            * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+            */
 
-           return false; // if a key node appears multiple times (indexOf !== lastIndexOf) it's a FROM-VIA or TO-VIA junction
 
-           function hasDuplicates(n, i, arr) {
-             return arr.indexOf(n) !== arr.lastIndexOf(n);
+           function baseIsNaN(value) {
+             return value !== value;
            }
+           /**
+            * The base implementation of `_.mean` and `_.meanBy` without support for
+            * iteratee shorthands.
+            *
+            * @private
+            * @param {Array} array The array to iterate over.
+            * @param {Function} iteratee The function invoked per iteration.
+            * @returns {number} Returns the mean.
+            */
 
-           function keyNodeFilter(froms, tos) {
-             return function (n) {
-               return froms.indexOf(n) === -1 && tos.indexOf(n) === -1;
+
+           function baseMean(array, iteratee) {
+             var length = array == null ? 0 : array.length;
+             return length ? baseSum(array, iteratee) / length : NAN;
+           }
+           /**
+            * The base implementation of `_.property` without support for deep paths.
+            *
+            * @private
+            * @param {string} key The key of the property to get.
+            * @returns {Function} Returns the new accessor function.
+            */
+
+
+           function baseProperty(key) {
+             return function (object) {
+               return object == null ? undefined$1 : object[key];
              };
            }
+           /**
+            * The base implementation of `_.propertyOf` without support for deep paths.
+            *
+            * @private
+            * @param {Object} object The object to query.
+            * @returns {Function} Returns the new accessor function.
+            */
 
-           function collectNodes(member, collection) {
-             var entity = graph.hasEntity(member.id);
-             if (!entity) return;
-             var role = member.role || '';
 
-             if (!collection[role]) {
-               collection[role] = [];
+           function basePropertyOf(object) {
+             return function (key) {
+               return object == null ? undefined$1 : object[key];
+             };
+           }
+           /**
+            * The base implementation of `_.reduce` and `_.reduceRight`, without support
+            * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
+            *
+            * @private
+            * @param {Array|Object} collection The collection to iterate over.
+            * @param {Function} iteratee The function invoked per iteration.
+            * @param {*} accumulator The initial value.
+            * @param {boolean} initAccum Specify using the first or last element of
+            *  `collection` as the initial value.
+            * @param {Function} eachFunc The function to iterate over `collection`.
+            * @returns {*} Returns the accumulated value.
+            */
+
+
+           function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
+             eachFunc(collection, function (value, index, collection) {
+               accumulator = initAccum ? (initAccum = false, value) : iteratee(accumulator, value, index, collection);
+             });
+             return accumulator;
+           }
+           /**
+            * The base implementation of `_.sortBy` which uses `comparer` to define the
+            * sort order of `array` and replaces criteria objects with their corresponding
+            * values.
+            *
+            * @private
+            * @param {Array} array The array to sort.
+            * @param {Function} comparer The function to define sort order.
+            * @returns {Array} Returns `array`.
+            */
+
+
+           function baseSortBy(array, comparer) {
+             var length = array.length;
+             array.sort(comparer);
+
+             while (length--) {
+               array[length] = array[length].value;
              }
 
-             if (member.type === 'node') {
-               collection[role].push(member.id);
+             return array;
+           }
+           /**
+            * The base implementation of `_.sum` and `_.sumBy` without support for
+            * iteratee shorthands.
+            *
+            * @private
+            * @param {Array} array The array to iterate over.
+            * @param {Function} iteratee The function invoked per iteration.
+            * @returns {number} Returns the sum.
+            */
 
-               if (role === 'via') {
-                 collection.keyfrom.push(member.id);
-                 collection.keyto.push(member.id);
-               }
-             } else if (member.type === 'way') {
-               collection[role].push.apply(collection[role], entity.nodes);
 
-               if (role === 'from' || role === 'via') {
-                 collection.keyfrom.push(entity.first());
-                 collection.keyfrom.push(entity.last());
-               }
+           function baseSum(array, iteratee) {
+             var result,
+                 index = -1,
+                 length = array.length;
 
-               if (role === 'to' || role === 'via') {
-                 collection.keyto.push(entity.first());
-                 collection.keyto.push(entity.last());
+             while (++index < length) {
+               var current = iteratee(array[index]);
+
+               if (current !== undefined$1) {
+                 result = result === undefined$1 ? current : result + current;
                }
              }
+
+             return result;
            }
-         };
+           /**
+            * The base implementation of `_.times` without support for iteratee shorthands
+            * or max array length checks.
+            *
+            * @private
+            * @param {number} n The number of times to invoke `iteratee`.
+            * @param {Function} iteratee The function invoked per iteration.
+            * @returns {Array} Returns the array of results.
+            */
 
-         return action;
-       }
 
-       function actionCopyEntities(ids, fromGraph) {
-         var _copies = {};
+           function baseTimes(n, iteratee) {
+             var index = -1,
+                 result = Array(n);
 
-         var action = function action(graph) {
-           ids.forEach(function (id) {
-             fromGraph.entity(id).copy(fromGraph, _copies);
-           });
+             while (++index < n) {
+               result[index] = iteratee(index);
+             }
 
-           for (var id in _copies) {
-             graph = graph.replace(_copies[id]);
+             return result;
            }
+           /**
+            * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
+            * of key-value pairs for `object` corresponding to the property names of `props`.
+            *
+            * @private
+            * @param {Object} object The object to query.
+            * @param {Array} props The property names to get values for.
+            * @returns {Object} Returns the key-value pairs.
+            */
 
-           return graph;
-         };
 
-         action.copies = function () {
-           return _copies;
-         };
+           function baseToPairs(object, props) {
+             return arrayMap(props, function (key) {
+               return [key, object[key]];
+             });
+           }
+           /**
+            * The base implementation of `_.trim`.
+            *
+            * @private
+            * @param {string} string The string to trim.
+            * @returns {string} Returns the trimmed string.
+            */
 
-         return action;
-       }
 
-       function actionDeleteMember(relationId, memberIndex) {
-         return function (graph) {
-           var relation = graph.entity(relationId).removeMember(memberIndex);
-           graph = graph.replace(relation);
-           if (relation.isDegenerate()) graph = actionDeleteRelation(relation.id)(graph);
-           return graph;
-         };
-       }
+           function baseTrim(string) {
+             return string ? string.slice(0, trimmedEndIndex(string) + 1).replace(reTrimStart, '') : string;
+           }
+           /**
+            * The base implementation of `_.unary` without support for storing metadata.
+            *
+            * @private
+            * @param {Function} func The function to cap arguments for.
+            * @returns {Function} Returns the new capped function.
+            */
 
-       function actionDiscardTags(difference, discardTags) {
-         discardTags = discardTags || {};
-         return function (graph) {
-           difference.modified().forEach(checkTags);
-           difference.created().forEach(checkTags);
-           return graph;
 
-           function checkTags(entity) {
-             var keys = Object.keys(entity.tags);
-             var didDiscard = false;
-             var tags = {};
+           function baseUnary(func) {
+             return function (value) {
+               return func(value);
+             };
+           }
+           /**
+            * The base implementation of `_.values` and `_.valuesIn` which creates an
+            * array of `object` property values corresponding to the property names
+            * of `props`.
+            *
+            * @private
+            * @param {Object} object The object to query.
+            * @param {Array} props The property names to get values for.
+            * @returns {Object} Returns the array of property values.
+            */
 
-             for (var i = 0; i < keys.length; i++) {
-               var k = keys[i];
 
-               if (discardTags[k] || !entity.tags[k]) {
-                 didDiscard = true;
-               } else {
-                 tags[k] = entity.tags[k];
-               }
-             }
+           function baseValues(object, props) {
+             return arrayMap(props, function (key) {
+               return object[key];
+             });
+           }
+           /**
+            * Checks if a `cache` value for `key` exists.
+            *
+            * @private
+            * @param {Object} cache The cache to query.
+            * @param {string} key The key of the entry to check.
+            * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+            */
 
-             if (didDiscard) {
-               graph = graph.replace(entity.update({
-                 tags: tags
-               }));
-             }
+
+           function cacheHas(cache, key) {
+             return cache.has(key);
            }
-         };
-       }
+           /**
+            * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
+            * that is not found in the character symbols.
+            *
+            * @private
+            * @param {Array} strSymbols The string symbols to inspect.
+            * @param {Array} chrSymbols The character symbols to find.
+            * @returns {number} Returns the index of the first unmatched string symbol.
+            */
 
-       //
-       // Optionally, disconnect only the given ways.
-       //
-       // For testing convenience, accepts an ID to assign to the (first) new node.
-       // Normally, this will be undefined and the way will automatically
-       // be assigned a new ID.
-       //
-       // This is the inverse of `iD.actionConnect`.
-       //
-       // Reference:
-       //   https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/UnjoinNodeAction.as
-       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/UnGlueAction.java
-       //
 
-       function actionDisconnect(nodeId, newNodeId) {
-         var wayIds;
+           function charsStartIndex(strSymbols, chrSymbols) {
+             var index = -1,
+                 length = strSymbols.length;
 
-         var action = function action(graph) {
-           var node = graph.entity(nodeId);
-           var connections = action.connections(graph);
-           connections.forEach(function (connection) {
-             var way = graph.entity(connection.wayID);
-             var newNode = osmNode({
-               id: newNodeId,
-               loc: node.loc,
-               tags: node.tags
-             });
-             graph = graph.replace(newNode);
+             while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
 
-             if (connection.index === 0 && way.isArea()) {
-               // replace shared node with shared node..
-               graph = graph.replace(way.replaceNode(way.nodes[0], newNode.id));
-             } else if (way.isClosed() && connection.index === way.nodes.length - 1) {
-               // replace closing node with new new node..
-               graph = graph.replace(way.unclose().addNode(newNode.id));
-             } else {
-               // replace shared node with multiple new nodes..
-               graph = graph.replace(way.updateNode(newNode.id, connection.index));
-             }
-           });
-           return graph;
-         };
+             return index;
+           }
+           /**
+            * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
+            * that is not found in the character symbols.
+            *
+            * @private
+            * @param {Array} strSymbols The string symbols to inspect.
+            * @param {Array} chrSymbols The character symbols to find.
+            * @returns {number} Returns the index of the last unmatched string symbol.
+            */
 
-         action.connections = function (graph) {
-           var candidates = [];
-           var keeping = false;
-           var parentWays = graph.parentWays(graph.entity(nodeId));
-           var way, waynode;
 
-           for (var i = 0; i < parentWays.length; i++) {
-             way = parentWays[i];
+           function charsEndIndex(strSymbols, chrSymbols) {
+             var index = strSymbols.length;
 
-             if (wayIds && wayIds.indexOf(way.id) === -1) {
-               keeping = true;
-               continue;
-             }
+             while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
 
-             if (way.isArea() && way.nodes[0] === nodeId) {
-               candidates.push({
-                 wayID: way.id,
-                 index: 0
-               });
-             } else {
-               for (var j = 0; j < way.nodes.length; j++) {
-                 waynode = way.nodes[j];
+             return index;
+           }
+           /**
+            * Gets the number of `placeholder` occurrences in `array`.
+            *
+            * @private
+            * @param {Array} array The array to inspect.
+            * @param {*} placeholder The placeholder to search for.
+            * @returns {number} Returns the placeholder count.
+            */
 
-                 if (waynode === nodeId) {
-                   if (way.isClosed() && parentWays.length > 1 && wayIds && wayIds.indexOf(way.id) !== -1 && j === way.nodes.length - 1) {
-                     continue;
-                   }
 
-                   candidates.push({
-                     wayID: way.id,
-                     index: j
-                   });
-                 }
+           function countHolders(array, placeholder) {
+             var length = array.length,
+                 result = 0;
+
+             while (length--) {
+               if (array[length] === placeholder) {
+                 ++result;
                }
              }
+
+             return result;
            }
+           /**
+            * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
+            * letters to basic Latin letters.
+            *
+            * @private
+            * @param {string} letter The matched letter to deburr.
+            * @returns {string} Returns the deburred letter.
+            */
 
-           return keeping ? candidates : candidates.slice(1);
-         };
 
-         action.disabled = function (graph) {
-           var connections = action.connections(graph);
-           if (connections.length === 0) return 'not_connected';
-           var parentWays = graph.parentWays(graph.entity(nodeId));
-           var seenRelationIds = {};
-           var sharedRelation;
-           parentWays.forEach(function (way) {
-             var relations = graph.parentRelations(way);
-             relations.forEach(function (relation) {
-               if (relation.id in seenRelationIds) {
-                 if (wayIds) {
-                   if (wayIds.indexOf(way.id) !== -1 || wayIds.indexOf(seenRelationIds[relation.id]) !== -1) {
-                     sharedRelation = relation;
-                   }
-                 } else {
-                   sharedRelation = relation;
-                 }
-               } else {
-                 seenRelationIds[relation.id] = way.id;
-               }
-             });
-           });
-           if (sharedRelation) return 'relation';
-         };
+           var deburrLetter = basePropertyOf(deburredLetters);
+           /**
+            * Used by `_.escape` to convert characters to HTML entities.
+            *
+            * @private
+            * @param {string} chr The matched character to escape.
+            * @returns {string} Returns the escaped character.
+            */
 
-         action.limitWays = function (val) {
-           if (!arguments.length) return wayIds;
-           wayIds = val;
-           return action;
-         };
+           var escapeHtmlChar = basePropertyOf(htmlEscapes);
+           /**
+            * Used by `_.template` to escape characters for inclusion in compiled string literals.
+            *
+            * @private
+            * @param {string} chr The matched character to escape.
+            * @returns {string} Returns the escaped character.
+            */
 
-         return action;
-       }
+           function escapeStringChar(chr) {
+             return '\\' + stringEscapes[chr];
+           }
+           /**
+            * Gets the value at `key` of `object`.
+            *
+            * @private
+            * @param {Object} [object] The object to query.
+            * @param {string} key The key of the property to get.
+            * @returns {*} Returns the property value.
+            */
 
-       var geojsonRewind = rewind;
 
-       function rewind(gj, outer) {
-         var type = gj && gj.type,
-             i;
+           function getValue(object, key) {
+             return object == null ? undefined$1 : object[key];
+           }
+           /**
+            * Checks if `string` contains Unicode symbols.
+            *
+            * @private
+            * @param {string} string The string to inspect.
+            * @returns {boolean} Returns `true` if a symbol is found, else `false`.
+            */
 
-         if (type === 'FeatureCollection') {
-           for (i = 0; i < gj.features.length; i++) {
-             rewind(gj.features[i], outer);
+
+           function hasUnicode(string) {
+             return reHasUnicode.test(string);
            }
-         } else if (type === 'GeometryCollection') {
-           for (i = 0; i < gj.geometries.length; i++) {
-             rewind(gj.geometries[i], outer);
+           /**
+            * Checks if `string` contains a word composed of Unicode symbols.
+            *
+            * @private
+            * @param {string} string The string to inspect.
+            * @returns {boolean} Returns `true` if a word is found, else `false`.
+            */
+
+
+           function hasUnicodeWord(string) {
+             return reHasUnicodeWord.test(string);
            }
-         } else if (type === 'Feature') {
-           rewind(gj.geometry, outer);
-         } else if (type === 'Polygon') {
-           rewindRings(gj.coordinates, outer);
-         } else if (type === 'MultiPolygon') {
-           for (i = 0; i < gj.coordinates.length; i++) {
-             rewindRings(gj.coordinates[i], outer);
+           /**
+            * Converts `iterator` to an array.
+            *
+            * @private
+            * @param {Object} iterator The iterator to convert.
+            * @returns {Array} Returns the converted array.
+            */
+
+
+           function iteratorToArray(iterator) {
+             var data,
+                 result = [];
+
+             while (!(data = iterator.next()).done) {
+               result.push(data.value);
+             }
+
+             return result;
            }
-         }
+           /**
+            * Converts `map` to its key-value pairs.
+            *
+            * @private
+            * @param {Object} map The map to convert.
+            * @returns {Array} Returns the key-value pairs.
+            */
 
-         return gj;
-       }
 
-       function rewindRings(rings, outer) {
-         if (rings.length === 0) return;
-         rewindRing(rings[0], outer);
+           function mapToArray(map) {
+             var index = -1,
+                 result = Array(map.size);
+             map.forEach(function (value, key) {
+               result[++index] = [key, value];
+             });
+             return result;
+           }
+           /**
+            * Creates a unary function that invokes `func` with its argument transformed.
+            *
+            * @private
+            * @param {Function} func The function to wrap.
+            * @param {Function} transform The argument transform.
+            * @returns {Function} Returns the new function.
+            */
 
-         for (var i = 1; i < rings.length; i++) {
-           rewindRing(rings[i], !outer);
-         }
-       }
 
-       function rewindRing(ring, dir) {
-         var area = 0;
+           function overArg(func, transform) {
+             return function (arg) {
+               return func(transform(arg));
+             };
+           }
+           /**
+            * Replaces all `placeholder` elements in `array` with an internal placeholder
+            * and returns an array of their indexes.
+            *
+            * @private
+            * @param {Array} array The array to modify.
+            * @param {*} placeholder The placeholder to replace.
+            * @returns {Array} Returns the new array of placeholder indexes.
+            */
 
-         for (var i = 0, len = ring.length, j = len - 1; i < len; j = i++) {
-           area += (ring[i][0] - ring[j][0]) * (ring[j][1] + ring[i][1]);
-         }
 
-         if (area >= 0 !== !!dir) ring.reverse();
-       }
+           function replaceHolders(array, placeholder) {
+             var index = -1,
+                 length = array.length,
+                 resIndex = 0,
+                 result = [];
 
-       function actionExtract(entityID) {
-         var extractedNodeID;
+             while (++index < length) {
+               var value = array[index];
 
-         var action = function action(graph) {
-           var entity = graph.entity(entityID);
+               if (value === placeholder || value === PLACEHOLDER) {
+                 array[index] = PLACEHOLDER;
+                 result[resIndex++] = index;
+               }
+             }
 
-           if (entity.type === 'node') {
-             return extractFromNode(entity, graph);
+             return result;
            }
+           /**
+            * Converts `set` to an array of its values.
+            *
+            * @private
+            * @param {Object} set The set to convert.
+            * @returns {Array} Returns the values.
+            */
 
-           return extractFromWayOrRelation(entity, graph);
-         };
 
-         function extractFromNode(node, graph) {
-           extractedNodeID = node.id; // Create a new node to replace the one we will detach
+           function setToArray(set) {
+             var index = -1,
+                 result = Array(set.size);
+             set.forEach(function (value) {
+               result[++index] = value;
+             });
+             return result;
+           }
+           /**
+            * Converts `set` to its value-value pairs.
+            *
+            * @private
+            * @param {Object} set The set to convert.
+            * @returns {Array} Returns the value-value pairs.
+            */
 
-           var replacement = osmNode({
-             loc: node.loc
-           });
-           graph = graph.replace(replacement); // Process each way in turn, updating the graph as we go
 
-           graph = graph.parentWays(node).reduce(function (accGraph, parentWay) {
-             return accGraph.replace(parentWay.replaceNode(entityID, replacement.id));
-           }, graph); // Process any relations too
+           function setToPairs(set) {
+             var index = -1,
+                 result = Array(set.size);
+             set.forEach(function (value) {
+               result[++index] = [value, value];
+             });
+             return result;
+           }
+           /**
+            * A specialized version of `_.indexOf` which performs strict equality
+            * comparisons of values, i.e. `===`.
+            *
+            * @private
+            * @param {Array} array The array to inspect.
+            * @param {*} value The value to search for.
+            * @param {number} fromIndex The index to search from.
+            * @returns {number} Returns the index of the matched value, else `-1`.
+            */
 
-           return graph.parentRelations(node).reduce(function (accGraph, parentRel) {
-             return accGraph.replace(parentRel.replaceMember(node, replacement));
-           }, graph);
-         }
 
-         function extractFromWayOrRelation(entity, graph) {
-           var fromGeometry = entity.geometry(graph);
-           var keysToCopyAndRetain = ['source', 'wheelchair'];
-           var keysToRetain = ['area'];
-           var buildingKeysToRetain = ['architect', 'building', 'height', 'layer']; // d3_geoCentroid is wrong for counterclockwise-wound polygons, so wind them clockwise
+           function strictIndexOf(array, value, fromIndex) {
+             var index = fromIndex - 1,
+                 length = array.length;
 
-           var extractedLoc = d3_geoCentroid(geojsonRewind(Object.assign({}, entity.asGeoJSON(graph)), true));
+             while (++index < length) {
+               if (array[index] === value) {
+                 return index;
+               }
+             }
 
-           if (!extractedLoc || !isFinite(extractedLoc[0]) || !isFinite(extractedLoc[1])) {
-             extractedLoc = entity.extent(graph).center();
+             return -1;
            }
+           /**
+            * A specialized version of `_.lastIndexOf` which performs strict equality
+            * comparisons of values, i.e. `===`.
+            *
+            * @private
+            * @param {Array} array The array to inspect.
+            * @param {*} value The value to search for.
+            * @param {number} fromIndex The index to search from.
+            * @returns {number} Returns the index of the matched value, else `-1`.
+            */
 
-           var indoorAreaValues = {
-             area: true,
-             corridor: true,
-             elevator: true,
-             level: true,
-             room: true
-           };
-           var isBuilding = entity.tags.building && entity.tags.building !== 'no' || entity.tags['building:part'] && entity.tags['building:part'] !== 'no';
-           var isIndoorArea = fromGeometry === 'area' && entity.tags.indoor && indoorAreaValues[entity.tags.indoor];
-           var entityTags = Object.assign({}, entity.tags); // shallow copy
 
-           var pointTags = {};
+           function strictLastIndexOf(array, value, fromIndex) {
+             var index = fromIndex + 1;
 
-           for (var key in entityTags) {
-             if (entity.type === 'relation' && key === 'type') {
-               continue;
+             while (index--) {
+               if (array[index] === value) {
+                 return index;
+               }
              }
 
-             if (keysToRetain.indexOf(key) !== -1) {
-               continue;
-             }
+             return index;
+           }
+           /**
+            * Gets the number of symbols in `string`.
+            *
+            * @private
+            * @param {string} string The string to inspect.
+            * @returns {number} Returns the string size.
+            */
 
-             if (isBuilding) {
-               // don't transfer building-related tags
-               if (buildingKeysToRetain.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
-             } // leave `indoor` tag on the area
 
+           function stringSize(string) {
+             return hasUnicode(string) ? unicodeSize(string) : asciiSize(string);
+           }
+           /**
+            * Converts `string` to an array.
+            *
+            * @private
+            * @param {string} string The string to convert.
+            * @returns {Array} Returns the converted array.
+            */
 
-             if (isIndoorArea && key === 'indoor') {
-               continue;
-             } // copy the tag from the entity to the point
 
+           function stringToArray(string) {
+             return hasUnicode(string) ? unicodeToArray(string) : asciiToArray(string);
+           }
+           /**
+            * Used by `_.trim` and `_.trimEnd` to get the index of the last non-whitespace
+            * character of `string`.
+            *
+            * @private
+            * @param {string} string The string to inspect.
+            * @returns {number} Returns the index of the last non-whitespace character.
+            */
 
-             pointTags[key] = entityTags[key]; // leave addresses and some other tags so they're on both features
 
-             if (keysToCopyAndRetain.indexOf(key) !== -1 || key.match(/^addr:.{1,}/)) {
-               continue;
-             } else if (isIndoorArea && key === 'level') {
-               // leave `level` on both features
-               continue;
-             } // remove the tag from the entity
+           function trimmedEndIndex(string) {
+             var index = string.length;
 
+             while (index-- && reWhitespace.test(string.charAt(index))) {}
 
-             delete entityTags[key];
+             return index;
            }
+           /**
+            * Used by `_.unescape` to convert HTML entities to characters.
+            *
+            * @private
+            * @param {string} chr The matched character to unescape.
+            * @returns {string} Returns the unescaped character.
+            */
 
-           if (!isBuilding && !isIndoorArea && fromGeometry === 'area') {
-             // ensure that areas keep area geometry
-             entityTags.area = 'yes';
-           }
 
-           var replacement = osmNode({
-             loc: extractedLoc,
-             tags: pointTags
-           });
-           graph = graph.replace(replacement);
-           extractedNodeID = replacement.id;
-           return graph.replace(entity.update({
-             tags: entityTags
-           }));
-         }
+           var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
+           /**
+            * Gets the size of a Unicode `string`.
+            *
+            * @private
+            * @param {string} string The string inspect.
+            * @returns {number} Returns the string size.
+            */
 
-         action.getExtractedNodeID = function () {
-           return extractedNodeID;
-         };
+           function unicodeSize(string) {
+             var result = reUnicode.lastIndex = 0;
 
-         return action;
-       }
+             while (reUnicode.test(string)) {
+               ++result;
+             }
 
-       //
-       // This is the inverse of `iD.actionSplit`.
-       //
-       // Reference:
-       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MergeWaysAction.as
-       //   https://github.com/openstreetmap/josm/blob/mirror/src/org/openstreetmap/josm/actions/CombineWayAction.java
-       //
+             return result;
+           }
+           /**
+            * Converts a Unicode `string` to an array.
+            *
+            * @private
+            * @param {string} string The string to convert.
+            * @returns {Array} Returns the converted array.
+            */
 
-       function actionJoin(ids) {
-         function groupEntitiesByGeometry(graph) {
-           var entities = ids.map(function (id) {
-             return graph.entity(id);
-           });
-           return Object.assign({
-             line: []
-           }, utilArrayGroupBy(entities, function (entity) {
-             return entity.geometry(graph);
-           }));
-         }
 
-         var action = function action(graph) {
-           var ways = ids.map(graph.entity, graph);
-           var survivorID = ways[0].id; // if any of the ways are sided (e.g. coastline, cliff, kerb)
-           // sort them first so they establish the overall order - #6033
+           function unicodeToArray(string) {
+             return string.match(reUnicode) || [];
+           }
+           /**
+            * Splits a Unicode `string` into an array of its words.
+            *
+            * @private
+            * @param {string} The string to inspect.
+            * @returns {Array} Returns the words of `string`.
+            */
 
-           ways.sort(function (a, b) {
-             var aSided = a.isSided();
-             var bSided = b.isSided();
-             return aSided && !bSided ? -1 : bSided && !aSided ? 1 : 0;
-           }); // Prefer to keep an existing way.
 
-           for (var i = 0; i < ways.length; i++) {
-             if (!ways[i].isNew()) {
-               survivorID = ways[i].id;
-               break;
-             }
+           function unicodeWords(string) {
+             return string.match(reUnicodeWord) || [];
            }
+           /*--------------------------------------------------------------------------*/
 
-           var sequences = osmJoinWays(ways, graph);
-           var joined = sequences[0]; // We might need to reverse some of these ways before joining them.  #4688
-           // `joined.actions` property will contain any actions we need to apply.
-
-           graph = sequences.actions.reduce(function (g, action) {
-             return action(g);
-           }, graph);
-           var survivor = graph.entity(survivorID);
-           survivor = survivor.update({
-             nodes: joined.nodes.map(function (n) {
-               return n.id;
-             })
-           });
-           graph = graph.replace(survivor);
-           joined.forEach(function (way) {
-             if (way.id === survivorID) return;
-             graph.parentRelations(way).forEach(function (parent) {
-               graph = graph.replace(parent.replaceMember(way, survivor));
-             });
-             survivor = survivor.mergeTags(way.tags);
-             graph = graph.replace(survivor);
-             graph = actionDeleteWay(way.id)(graph);
-           }); // Finds if the join created a single-member multipolygon,
-           // and if so turns it into a basic area instead
+           /**
+            * Create a new pristine `lodash` function using the `context` object.
+            *
+            * @static
+            * @memberOf _
+            * @since 1.1.0
+            * @category Util
+            * @param {Object} [context=root] The context object.
+            * @returns {Function} Returns a new `lodash` function.
+            * @example
+            *
+            * _.mixin({ 'foo': _.constant('foo') });
+            *
+            * var lodash = _.runInContext();
+            * lodash.mixin({ 'bar': lodash.constant('bar') });
+            *
+            * _.isFunction(_.foo);
+            * // => true
+            * _.isFunction(_.bar);
+            * // => false
+            *
+            * lodash.isFunction(lodash.foo);
+            * // => false
+            * lodash.isFunction(lodash.bar);
+            * // => true
+            *
+            * // Create a suped-up `defer` in Node.js.
+            * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
+            */
 
-           function checkForSimpleMultipolygon() {
-             if (!survivor.isClosed()) return;
-             var multipolygons = graph.parentMultipolygons(survivor).filter(function (multipolygon) {
-               // find multipolygons where the survivor is the only member
-               return multipolygon.members.length === 1;
-             }); // skip if this is the single member of multiple multipolygons
 
-             if (multipolygons.length !== 1) return;
-             var multipolygon = multipolygons[0];
+           var runInContext = function runInContext(context) {
+             context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
+             /** Built-in constructor references. */
 
-             for (var key in survivor.tags) {
-               if (multipolygon.tags[key] && // don't collapse if tags cannot be cleanly merged
-               multipolygon.tags[key] !== survivor.tags[key]) return;
-             }
+             var Array = context.Array,
+                 Date = context.Date,
+                 Error = context.Error,
+                 Function = context.Function,
+                 Math = context.Math,
+                 Object = context.Object,
+                 RegExp = context.RegExp,
+                 String = context.String,
+                 TypeError = context.TypeError;
+             /** Used for built-in method references. */
 
-             survivor = survivor.mergeTags(multipolygon.tags);
-             graph = graph.replace(survivor);
-             graph = actionDeleteRelation(multipolygon.id, true
-             /* allow untagged members */
-             )(graph);
-             var tags = Object.assign({}, survivor.tags);
+             var arrayProto = Array.prototype,
+                 funcProto = Function.prototype,
+                 objectProto = Object.prototype;
+             /** Used to detect overreaching core-js shims. */
 
-             if (survivor.geometry(graph) !== 'area') {
-               // ensure the feature persists as an area
-               tags.area = 'yes';
-             }
+             var coreJsData = context['__core-js_shared__'];
+             /** Used to resolve the decompiled source of functions. */
 
-             delete tags.type; // remove type=multipolygon
+             var funcToString = funcProto.toString;
+             /** Used to check objects for own properties. */
 
-             survivor = survivor.update({
-               tags: tags
-             });
-             graph = graph.replace(survivor);
-           }
+             var hasOwnProperty = objectProto.hasOwnProperty;
+             /** Used to generate unique IDs. */
 
-           checkForSimpleMultipolygon();
-           return graph;
-         }; // Returns the number of nodes the resultant way is expected to have
+             var idCounter = 0;
+             /** Used to detect methods masquerading as native. */
 
+             var maskSrcKey = function () {
+               var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
+               return uid ? 'Symbol(src)_1.' + uid : '';
+             }();
+             /**
+              * Used to resolve the
+              * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
+              * of values.
+              */
 
-         action.resultingWayNodesLength = function (graph) {
-           return ids.reduce(function (count, id) {
-             return count + graph.entity(id).nodes.length;
-           }, 0) - ids.length - 1;
-         };
 
-         action.disabled = function (graph) {
-           var geometries = groupEntitiesByGeometry(graph);
+             var nativeObjectToString = objectProto.toString;
+             /** Used to infer the `Object` constructor. */
 
-           if (ids.length < 2 || ids.length !== geometries.line.length) {
-             return 'not_eligible';
-           }
+             var objectCtorString = funcToString.call(Object);
+             /** Used to restore the original `_` reference in `_.noConflict`. */
 
-           var joined = osmJoinWays(ids.map(graph.entity, graph), graph);
+             var oldDash = root._;
+             /** Used to detect if a method is native. */
 
-           if (joined.length > 1) {
-             return 'not_adjacent';
-           } // Loop through all combinations of path-pairs
-           // to check potential intersections between all pairs
+             var reIsNative = RegExp('^' + funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&').replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$');
+             /** Built-in value references. */
 
+             var Buffer = moduleExports ? context.Buffer : undefined$1,
+                 _Symbol = context.Symbol,
+                 Uint8Array = context.Uint8Array,
+                 allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined$1,
+                 getPrototype = overArg(Object.getPrototypeOf, Object),
+                 objectCreate = Object.create,
+                 propertyIsEnumerable = objectProto.propertyIsEnumerable,
+                 splice = arrayProto.splice,
+                 spreadableSymbol = _Symbol ? _Symbol.isConcatSpreadable : undefined$1,
+                 symIterator = _Symbol ? _Symbol.iterator : undefined$1,
+                 symToStringTag = _Symbol ? _Symbol.toStringTag : undefined$1;
 
-           for (var i = 0; i < ids.length - 1; i++) {
-             for (var j = i + 1; j < ids.length; j++) {
-               var path1 = graph.childNodes(graph.entity(ids[i])).map(function (e) {
-                 return e.loc;
-               });
-               var path2 = graph.childNodes(graph.entity(ids[j])).map(function (e) {
-                 return e.loc;
-               });
-               var intersections = geoPathIntersections(path1, path2); // Check if intersections are just nodes lying on top of
-               // each other/the line, as opposed to crossing it
+             var defineProperty = function () {
+               try {
+                 var func = getNative(Object, 'defineProperty');
+                 func({}, '', {});
+                 return func;
+               } catch (e) {}
+             }();
+             /** Mocked built-ins. */
+
+
+             var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
+                 ctxNow = Date && Date.now !== root.Date.now && Date.now,
+                 ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
+             /* Built-in method references for those with the same name as other `lodash` methods. */
+
+             var nativeCeil = Math.ceil,
+                 nativeFloor = Math.floor,
+                 nativeGetSymbols = Object.getOwnPropertySymbols,
+                 nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined$1,
+                 nativeIsFinite = context.isFinite,
+                 nativeJoin = arrayProto.join,
+                 nativeKeys = overArg(Object.keys, Object),
+                 nativeMax = Math.max,
+                 nativeMin = Math.min,
+                 nativeNow = Date.now,
+                 nativeParseInt = context.parseInt,
+                 nativeRandom = Math.random,
+                 nativeReverse = arrayProto.reverse;
+             /* Built-in method references that are verified to be native. */
+
+             var DataView = getNative(context, 'DataView'),
+                 Map = getNative(context, 'Map'),
+                 Promise = getNative(context, 'Promise'),
+                 Set = getNative(context, 'Set'),
+                 WeakMap = getNative(context, 'WeakMap'),
+                 nativeCreate = getNative(Object, 'create');
+             /** Used to store function metadata. */
+
+             var metaMap = WeakMap && new WeakMap();
+             /** Used to lookup unminified function names. */
+
+             var realNames = {};
+             /** Used to detect maps, sets, and weakmaps. */
+
+             var dataViewCtorString = toSource(DataView),
+                 mapCtorString = toSource(Map),
+                 promiseCtorString = toSource(Promise),
+                 setCtorString = toSource(Set),
+                 weakMapCtorString = toSource(WeakMap);
+             /** Used to convert symbols to primitives and strings. */
+
+             var symbolProto = _Symbol ? _Symbol.prototype : undefined$1,
+                 symbolValueOf = symbolProto ? symbolProto.valueOf : undefined$1,
+                 symbolToString = symbolProto ? symbolProto.toString : undefined$1;
+             /*------------------------------------------------------------------------*/
 
-               var common = utilArrayIntersection(joined[0].nodes.map(function (n) {
-                 return n.loc.toString();
-               }), intersections.map(function (n) {
-                 return n.toString();
-               }));
+             /**
+              * Creates a `lodash` object which wraps `value` to enable implicit method
+              * chain sequences. Methods that operate on and return arrays, collections,
+              * and functions can be chained together. Methods that retrieve a single value
+              * or may return a primitive value will automatically end the chain sequence
+              * and return the unwrapped value. Otherwise, the value must be unwrapped
+              * with `_#value`.
+              *
+              * Explicit chain sequences, which must be unwrapped with `_#value`, may be
+              * enabled using `_.chain`.
+              *
+              * The execution of chained methods is lazy, that is, it's deferred until
+              * `_#value` is implicitly or explicitly called.
+              *
+              * Lazy evaluation allows several methods to support shortcut fusion.
+              * Shortcut fusion is an optimization to merge iteratee calls; this avoids
+              * the creation of intermediate arrays and can greatly reduce the number of
+              * iteratee executions. Sections of a chain sequence qualify for shortcut
+              * fusion if the section is applied to an array and iteratees accept only
+              * one argument. The heuristic for whether a section qualifies for shortcut
+              * fusion is subject to change.
+              *
+              * Chaining is supported in custom builds as long as the `_#value` method is
+              * directly or indirectly included in the build.
+              *
+              * In addition to lodash methods, wrappers have `Array` and `String` methods.
+              *
+              * The wrapper `Array` methods are:
+              * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
+              *
+              * The wrapper `String` methods are:
+              * `replace` and `split`
+              *
+              * The wrapper methods that support shortcut fusion are:
+              * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
+              * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
+              * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
+              *
+              * The chainable wrapper methods are:
+              * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
+              * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
+              * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
+              * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
+              * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
+              * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
+              * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
+              * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
+              * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
+              * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
+              * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
+              * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
+              * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
+              * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
+              * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
+              * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
+              * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
+              * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
+              * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
+              * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
+              * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
+              * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
+              * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
+              * `zipObject`, `zipObjectDeep`, and `zipWith`
+              *
+              * The wrapper methods that are **not** chainable by default are:
+              * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
+              * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
+              * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
+              * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
+              * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
+              * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
+              * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
+              * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
+              * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
+              * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
+              * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
+              * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
+              * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
+              * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
+              * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
+              * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
+              * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
+              * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
+              * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
+              * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
+              * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
+              * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
+              * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
+              * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
+              * `upperFirst`, `value`, and `words`
+              *
+              * @name _
+              * @constructor
+              * @category Seq
+              * @param {*} value The value to wrap in a `lodash` instance.
+              * @returns {Object} Returns the new `lodash` wrapper instance.
+              * @example
+              *
+              * function square(n) {
+              *   return n * n;
+              * }
+              *
+              * var wrapped = _([1, 2, 3]);
+              *
+              * // Returns an unwrapped value.
+              * wrapped.reduce(_.add);
+              * // => 6
+              *
+              * // Returns a wrapped value.
+              * var squares = wrapped.map(square);
+              *
+              * _.isArray(squares);
+              * // => false
+              *
+              * _.isArray(squares.value());
+              * // => true
+              */
 
-               if (common.length !== intersections.length) {
-                 return 'paths_intersect';
-               }
-             }
-           }
+             function lodash(value) {
+               if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
+                 if (value instanceof LodashWrapper) {
+                   return value;
+                 }
 
-           var nodeIds = joined[0].nodes.map(function (n) {
-             return n.id;
-           }).slice(1, -1);
-           var relation;
-           var tags = {};
-           var conflicting = false;
-           joined[0].forEach(function (way) {
-             var parents = graph.parentRelations(way);
-             parents.forEach(function (parent) {
-               if (parent.isRestriction() && parent.members.some(function (m) {
-                 return nodeIds.indexOf(m.id) >= 0;
-               })) {
-                 relation = parent;
+                 if (hasOwnProperty.call(value, '__wrapped__')) {
+                   return wrapperClone(value);
+                 }
                }
-             });
 
-             for (var k in way.tags) {
-               if (!(k in tags)) {
-                 tags[k] = way.tags[k];
-               } else if (tags[k] && osmIsInterestingTag(k) && tags[k] !== way.tags[k]) {
-                 conflicting = true;
-               }
+               return new LodashWrapper(value);
              }
-           });
+             /**
+              * The base implementation of `_.create` without support for assigning
+              * properties to the created object.
+              *
+              * @private
+              * @param {Object} proto The object to inherit from.
+              * @returns {Object} Returns the new object.
+              */
 
-           if (relation) {
-             return 'restriction';
-           }
 
-           if (conflicting) {
-             return 'conflicting_tags';
-           }
-         };
+             var baseCreate = function () {
+               function object() {}
 
-         return action;
-       }
+               return function (proto) {
+                 if (!isObject(proto)) {
+                   return {};
+                 }
 
-       function actionMerge(ids) {
-         function groupEntitiesByGeometry(graph) {
-           var entities = ids.map(function (id) {
-             return graph.entity(id);
-           });
-           return Object.assign({
-             point: [],
-             area: [],
-             line: [],
-             relation: []
-           }, utilArrayGroupBy(entities, function (entity) {
-             return entity.geometry(graph);
-           }));
-         }
+                 if (objectCreate) {
+                   return objectCreate(proto);
+                 }
 
-         var action = function action(graph) {
-           var geometries = groupEntitiesByGeometry(graph);
-           var target = geometries.area[0] || geometries.line[0];
-           var points = geometries.point;
-           points.forEach(function (point) {
-             target = target.mergeTags(point.tags);
-             graph = graph.replace(target);
-             graph.parentRelations(point).forEach(function (parent) {
-               graph = graph.replace(parent.replaceMember(point, target));
-             });
-             var nodes = utilArrayUniq(graph.childNodes(target));
-             var removeNode = point;
+                 object.prototype = proto;
+                 var result = new object();
+                 object.prototype = undefined$1;
+                 return result;
+               };
+             }();
+             /**
+              * The function whose prototype chain sequence wrappers inherit from.
+              *
+              * @private
+              */
 
-             for (var i = 0; i < nodes.length; i++) {
-               var node = nodes[i];
 
-               if (graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags()) {
-                 continue;
-               } // Found an uninteresting child node on the target way.
-               // Move orig point into its place to preserve point's history. #3683
+             function baseLodash() {// No operation performed.
+             }
+             /**
+              * The base constructor for creating `lodash` wrapper objects.
+              *
+              * @private
+              * @param {*} value The value to wrap.
+              * @param {boolean} [chainAll] Enable explicit method chain sequences.
+              */
 
 
-               graph = graph.replace(point.update({
-                 tags: {},
-                 loc: node.loc
-               }));
-               target = target.replaceNode(node.id, point.id);
-               graph = graph.replace(target);
-               removeNode = node;
-               break;
+             function LodashWrapper(value, chainAll) {
+               this.__wrapped__ = value;
+               this.__actions__ = [];
+               this.__chain__ = !!chainAll;
+               this.__index__ = 0;
+               this.__values__ = undefined$1;
              }
+             /**
+              * By default, the template delimiters used by lodash are like those in
+              * embedded Ruby (ERB) as well as ES2015 template strings. Change the
+              * following template settings to use alternative delimiters.
+              *
+              * @static
+              * @memberOf _
+              * @type {Object}
+              */
 
-             graph = graph.remove(removeNode);
-           });
 
-           if (target.tags.area === 'yes') {
-             var tags = Object.assign({}, target.tags); // shallow copy
+             lodash.templateSettings = {
+               /**
+                * Used to detect `data` property values to be HTML-escaped.
+                *
+                * @memberOf _.templateSettings
+                * @type {RegExp}
+                */
+               'escape': reEscape,
 
-             delete tags.area;
+               /**
+                * Used to detect code to be evaluated.
+                *
+                * @memberOf _.templateSettings
+                * @type {RegExp}
+                */
+               'evaluate': reEvaluate,
 
-             if (osmTagSuggestingArea(tags)) {
-               // remove the `area` tag if area geometry is now implied - #3851
-               target = target.update({
-                 tags: tags
-               });
-               graph = graph.replace(target);
-             }
-           }
+               /**
+                * Used to detect `data` property values to inject.
+                *
+                * @memberOf _.templateSettings
+                * @type {RegExp}
+                */
+               'interpolate': reInterpolate,
 
-           return graph;
-         };
+               /**
+                * Used to reference the data object in the template text.
+                *
+                * @memberOf _.templateSettings
+                * @type {string}
+                */
+               'variable': '',
 
-         action.disabled = function (graph) {
-           var geometries = groupEntitiesByGeometry(graph);
+               /**
+                * Used to import variables into the compiled template.
+                *
+                * @memberOf _.templateSettings
+                * @type {Object}
+                */
+               'imports': {
+                 /**
+                  * A reference to the `lodash` function.
+                  *
+                  * @memberOf _.templateSettings.imports
+                  * @type {Function}
+                  */
+                 '_': lodash
+               }
+             }; // Ensure wrappers are instances of `baseLodash`.
+
+             lodash.prototype = baseLodash.prototype;
+             lodash.prototype.constructor = lodash;
+             LodashWrapper.prototype = baseCreate(baseLodash.prototype);
+             LodashWrapper.prototype.constructor = LodashWrapper;
+             /*------------------------------------------------------------------------*/
 
-           if (geometries.point.length === 0 || geometries.area.length + geometries.line.length !== 1 || geometries.relation.length !== 0) {
-             return 'not_eligible';
-           }
-         };
+             /**
+              * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
+              *
+              * @private
+              * @constructor
+              * @param {*} value The value to wrap.
+              */
 
-         return action;
-       }
+             function LazyWrapper(value) {
+               this.__wrapped__ = value;
+               this.__actions__ = [];
+               this.__dir__ = 1;
+               this.__filtered__ = false;
+               this.__iteratees__ = [];
+               this.__takeCount__ = MAX_ARRAY_LENGTH;
+               this.__views__ = [];
+             }
+             /**
+              * Creates a clone of the lazy wrapper object.
+              *
+              * @private
+              * @name clone
+              * @memberOf LazyWrapper
+              * @returns {Object} Returns the cloned `LazyWrapper` object.
+              */
 
-       //
-       // 1. move all the nodes to a common location
-       // 2. `actionConnect` them
 
-       function actionMergeNodes(nodeIDs, loc) {
-         // If there is a single "interesting" node, use that as the location.
-         // Otherwise return the average location of all the nodes.
-         function chooseLoc(graph) {
-           if (!nodeIDs.length) return null;
-           var sum = [0, 0];
-           var interestingCount = 0;
-           var interestingLoc;
+             function lazyClone() {
+               var result = new LazyWrapper(this.__wrapped__);
+               result.__actions__ = copyArray(this.__actions__);
+               result.__dir__ = this.__dir__;
+               result.__filtered__ = this.__filtered__;
+               result.__iteratees__ = copyArray(this.__iteratees__);
+               result.__takeCount__ = this.__takeCount__;
+               result.__views__ = copyArray(this.__views__);
+               return result;
+             }
+             /**
+              * Reverses the direction of lazy iteration.
+              *
+              * @private
+              * @name reverse
+              * @memberOf LazyWrapper
+              * @returns {Object} Returns the new reversed `LazyWrapper` object.
+              */
 
-           for (var i = 0; i < nodeIDs.length; i++) {
-             var node = graph.entity(nodeIDs[i]);
 
-             if (node.hasInterestingTags()) {
-               interestingLoc = ++interestingCount === 1 ? node.loc : null;
+             function lazyReverse() {
+               if (this.__filtered__) {
+                 var result = new LazyWrapper(this);
+                 result.__dir__ = -1;
+                 result.__filtered__ = true;
+               } else {
+                 result = this.clone();
+                 result.__dir__ *= -1;
+               }
+
+               return result;
              }
+             /**
+              * Extracts the unwrapped value from its lazy wrapper.
+              *
+              * @private
+              * @name value
+              * @memberOf LazyWrapper
+              * @returns {*} Returns the unwrapped value.
+              */
 
-             sum = geoVecAdd(sum, node.loc);
-           }
 
-           return interestingLoc || geoVecScale(sum, 1 / nodeIDs.length);
-         }
+             function lazyValue() {
+               var array = this.__wrapped__.value(),
+                   dir = this.__dir__,
+                   isArr = isArray(array),
+                   isRight = dir < 0,
+                   arrLength = isArr ? array.length : 0,
+                   view = getView(0, arrLength, this.__views__),
+                   start = view.start,
+                   end = view.end,
+                   length = end - start,
+                   index = isRight ? end : start - 1,
+                   iteratees = this.__iteratees__,
+                   iterLength = iteratees.length,
+                   resIndex = 0,
+                   takeCount = nativeMin(length, this.__takeCount__);
 
-         var action = function action(graph) {
-           if (nodeIDs.length < 2) return graph;
-           var toLoc = loc;
+               if (!isArr || !isRight && arrLength == length && takeCount == length) {
+                 return baseWrapperValue(array, this.__actions__);
+               }
 
-           if (!toLoc) {
-             toLoc = chooseLoc(graph);
-           }
+               var result = [];
 
-           for (var i = 0; i < nodeIDs.length; i++) {
-             var node = graph.entity(nodeIDs[i]);
+               outer: while (length-- && resIndex < takeCount) {
+                 index += dir;
+                 var iterIndex = -1,
+                     value = array[index];
+
+                 while (++iterIndex < iterLength) {
+                   var data = iteratees[iterIndex],
+                       iteratee = data.iteratee,
+                       type = data.type,
+                       computed = iteratee(value);
+
+                   if (type == LAZY_MAP_FLAG) {
+                     value = computed;
+                   } else if (!computed) {
+                     if (type == LAZY_FILTER_FLAG) {
+                       continue outer;
+                     } else {
+                       break outer;
+                     }
+                   }
+                 }
 
-             if (node.loc !== toLoc) {
-               graph = graph.replace(node.move(toLoc));
-             }
-           }
+                 result[resIndex++] = value;
+               }
 
-           return actionConnect(nodeIDs)(graph);
-         };
+               return result;
+             } // Ensure `LazyWrapper` is an instance of `baseLodash`.
 
-         action.disabled = function (graph) {
-           if (nodeIDs.length < 2) return 'not_eligible';
 
-           for (var i = 0; i < nodeIDs.length; i++) {
-             var entity = graph.entity(nodeIDs[i]);
-             if (entity.type !== 'node') return 'not_eligible';
-           }
+             LazyWrapper.prototype = baseCreate(baseLodash.prototype);
+             LazyWrapper.prototype.constructor = LazyWrapper;
+             /*------------------------------------------------------------------------*/
 
-           return actionConnect(nodeIDs).disabled(graph);
-         };
+             /**
+              * Creates a hash object.
+              *
+              * @private
+              * @constructor
+              * @param {Array} [entries] The key-value pairs to cache.
+              */
 
-         return action;
-       }
+             function Hash(entries) {
+               var index = -1,
+                   length = entries == null ? 0 : entries.length;
+               this.clear();
 
-       function osmChangeset() {
-         if (!(this instanceof osmChangeset)) {
-           return new osmChangeset().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
-         }
-       }
-       osmEntity.changeset = osmChangeset;
-       osmChangeset.prototype = Object.create(osmEntity.prototype);
-       Object.assign(osmChangeset.prototype, {
-         type: 'changeset',
-         extent: function extent() {
-           return new geoExtent();
-         },
-         geometry: function geometry() {
-           return 'changeset';
-         },
-         asJXON: function asJXON() {
-           return {
-             osm: {
-               changeset: {
-                 tag: Object.keys(this.tags).map(function (k) {
-                   return {
-                     '@k': k,
-                     '@v': this.tags[k]
-                   };
-                 }, this),
-                 '@version': 0.6,
-                 '@generator': 'iD'
+               while (++index < length) {
+                 var entry = entries[index];
+                 this.set(entry[0], entry[1]);
                }
              }
-           };
-         },
-         // Generate [osmChange](http://wiki.openstreetmap.org/wiki/OsmChange)
-         // XML. Returns a string.
-         osmChangeJXON: function osmChangeJXON(changes) {
-           var changeset_id = this.id;
+             /**
+              * Removes all key-value entries from the hash.
+              *
+              * @private
+              * @name clear
+              * @memberOf Hash
+              */
 
-           function nest(x, order) {
-             var groups = {};
 
-             for (var i = 0; i < x.length; i++) {
-               var tagName = Object.keys(x[i])[0];
-               if (!groups[tagName]) groups[tagName] = [];
-               groups[tagName].push(x[i][tagName]);
+             function hashClear() {
+               this.__data__ = nativeCreate ? nativeCreate(null) : {};
+               this.size = 0;
              }
+             /**
+              * Removes `key` and its value from the hash.
+              *
+              * @private
+              * @name delete
+              * @memberOf Hash
+              * @param {Object} hash The hash to modify.
+              * @param {string} key The key of the value to remove.
+              * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+              */
 
-             var ordered = {};
-             order.forEach(function (o) {
-               if (groups[o]) ordered[o] = groups[o];
-             });
-             return ordered;
-           } // sort relations in a changeset by dependencies
+
+             function hashDelete(key) {
+               var result = this.has(key) && delete this.__data__[key];
+               this.size -= result ? 1 : 0;
+               return result;
+             }
+             /**
+              * Gets the hash value for `key`.
+              *
+              * @private
+              * @name get
+              * @memberOf Hash
+              * @param {string} key The key of the value to get.
+              * @returns {*} Returns the entry value.
+              */
 
 
-           function sort(changes) {
-             // find a referenced relation in the current changeset
-             function resolve(item) {
-               return relations.find(function (relation) {
-                 return item.keyAttributes.type === 'relation' && item.keyAttributes.ref === relation['@id'];
-               });
-             } // a new item is an item that has not been already processed
+             function hashGet(key) {
+               var data = this.__data__;
 
+               if (nativeCreate) {
+                 var result = data[key];
+                 return result === HASH_UNDEFINED ? undefined$1 : result;
+               }
 
-             function isNew(item) {
-               return !sorted[item['@id']] && !processing.find(function (proc) {
-                 return proc['@id'] === item['@id'];
-               });
+               return hasOwnProperty.call(data, key) ? data[key] : undefined$1;
+             }
+             /**
+              * Checks if a hash value for `key` exists.
+              *
+              * @private
+              * @name has
+              * @memberOf Hash
+              * @param {string} key The key of the entry to check.
+              * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+              */
+
+
+             function hashHas(key) {
+               var data = this.__data__;
+               return nativeCreate ? data[key] !== undefined$1 : hasOwnProperty.call(data, key);
              }
+             /**
+              * Sets the hash `key` to `value`.
+              *
+              * @private
+              * @name set
+              * @memberOf Hash
+              * @param {string} key The key of the value to set.
+              * @param {*} value The value to set.
+              * @returns {Object} Returns the hash instance.
+              */
 
-             var processing = [];
-             var sorted = {};
-             var relations = changes.relation;
-             if (!relations) return changes;
 
-             for (var i = 0; i < relations.length; i++) {
-               var relation = relations[i]; // skip relation if already sorted
+             function hashSet(key, value) {
+               var data = this.__data__;
+               this.size += this.has(key) ? 0 : 1;
+               data[key] = nativeCreate && value === undefined$1 ? HASH_UNDEFINED : value;
+               return this;
+             } // Add methods to `Hash`.
 
-               if (!sorted[relation['@id']]) {
-                 processing.push(relation);
-               }
 
-               while (processing.length > 0) {
-                 var next = processing[0],
-                     deps = next.member.map(resolve).filter(Boolean).filter(isNew);
+             Hash.prototype.clear = hashClear;
+             Hash.prototype['delete'] = hashDelete;
+             Hash.prototype.get = hashGet;
+             Hash.prototype.has = hashHas;
+             Hash.prototype.set = hashSet;
+             /*------------------------------------------------------------------------*/
 
-                 if (deps.length === 0) {
-                   sorted[next['@id']] = next;
-                   processing.shift();
-                 } else {
-                   processing = deps.concat(processing);
-                 }
+             /**
+              * Creates an list cache object.
+              *
+              * @private
+              * @constructor
+              * @param {Array} [entries] The key-value pairs to cache.
+              */
+
+             function ListCache(entries) {
+               var index = -1,
+                   length = entries == null ? 0 : entries.length;
+               this.clear();
+
+               while (++index < length) {
+                 var entry = entries[index];
+                 this.set(entry[0], entry[1]);
                }
              }
+             /**
+              * Removes all key-value entries from the list cache.
+              *
+              * @private
+              * @name clear
+              * @memberOf ListCache
+              */
 
-             changes.relation = Object.values(sorted);
-             return changes;
-           }
-
-           function rep(entity) {
-             return entity.asJXON(changeset_id);
-           }
 
-           return {
-             osmChange: {
-               '@version': 0.6,
-               '@generator': 'iD',
-               'create': sort(nest(changes.created.map(rep), ['node', 'way', 'relation'])),
-               'modify': nest(changes.modified.map(rep), ['node', 'way', 'relation']),
-               'delete': Object.assign(nest(changes.deleted.map(rep), ['relation', 'way', 'node']), {
-                 '@if-unused': true
-               })
+             function listCacheClear() {
+               this.__data__ = [];
+               this.size = 0;
              }
-           };
-         },
-         asGeoJSON: function asGeoJSON() {
-           return {};
-         }
-       });
+             /**
+              * Removes `key` and its value from the list cache.
+              *
+              * @private
+              * @name delete
+              * @memberOf ListCache
+              * @param {string} key The key of the value to remove.
+              * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+              */
 
-       function osmNote() {
-         if (!(this instanceof osmNote)) {
-           return new osmNote().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
-         }
-       }
 
-       osmNote.id = function () {
-         return osmNote.id.next--;
-       };
+             function listCacheDelete(key) {
+               var data = this.__data__,
+                   index = assocIndexOf(data, key);
 
-       osmNote.id.next = -1;
-       Object.assign(osmNote.prototype, {
-         type: 'note',
-         initialize: function initialize(sources) {
-           for (var i = 0; i < sources.length; ++i) {
-             var source = sources[i];
+               if (index < 0) {
+                 return false;
+               }
 
-             for (var prop in source) {
-               if (Object.prototype.hasOwnProperty.call(source, prop)) {
-                 if (source[prop] === undefined) {
-                   delete this[prop];
-                 } else {
-                   this[prop] = source[prop];
-                 }
+               var lastIndex = data.length - 1;
+
+               if (index == lastIndex) {
+                 data.pop();
+               } else {
+                 splice.call(data, index, 1);
                }
+
+               --this.size;
+               return true;
              }
-           }
+             /**
+              * Gets the list cache value for `key`.
+              *
+              * @private
+              * @name get
+              * @memberOf ListCache
+              * @param {string} key The key of the value to get.
+              * @returns {*} Returns the entry value.
+              */
 
-           if (!this.id) {
-             this.id = osmNote.id().toString();
-           }
 
-           return this;
-         },
-         extent: function extent() {
-           return new geoExtent(this.loc);
-         },
-         update: function update(attrs) {
-           return osmNote(this, attrs); // {v: 1 + (this.v || 0)}
-         },
-         isNew: function isNew() {
-           return this.id < 0;
-         },
-         move: function move(loc) {
-           return this.update({
-             loc: loc
-           });
-         }
-       });
+             function listCacheGet(key) {
+               var data = this.__data__,
+                   index = assocIndexOf(data, key);
+               return index < 0 ? undefined$1 : data[index][1];
+             }
+             /**
+              * Checks if a list cache value for `key` exists.
+              *
+              * @private
+              * @name has
+              * @memberOf ListCache
+              * @param {string} key The key of the entry to check.
+              * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+              */
 
-       function osmRelation() {
-         if (!(this instanceof osmRelation)) {
-           return new osmRelation().initialize(arguments);
-         } else if (arguments.length) {
-           this.initialize(arguments);
-         }
-       }
-       osmEntity.relation = osmRelation;
-       osmRelation.prototype = Object.create(osmEntity.prototype);
 
-       osmRelation.creationOrder = function (a, b) {
-         var aId = parseInt(osmEntity.id.toOSM(a.id), 10);
-         var bId = parseInt(osmEntity.id.toOSM(b.id), 10);
-         if (aId < 0 || bId < 0) return aId - bId;
-         return bId - aId;
-       };
+             function listCacheHas(key) {
+               return assocIndexOf(this.__data__, key) > -1;
+             }
+             /**
+              * Sets the list cache `key` to `value`.
+              *
+              * @private
+              * @name set
+              * @memberOf ListCache
+              * @param {string} key The key of the value to set.
+              * @param {*} value The value to set.
+              * @returns {Object} Returns the list cache instance.
+              */
 
-       Object.assign(osmRelation.prototype, {
-         type: 'relation',
-         members: [],
-         copy: function copy(resolver, copies) {
-           if (copies[this.id]) return copies[this.id];
-           var copy = osmEntity.prototype.copy.call(this, resolver, copies);
-           var members = this.members.map(function (member) {
-             return Object.assign({}, member, {
-               id: resolver.entity(member.id).copy(resolver, copies).id
-             });
-           });
-           copy = copy.update({
-             members: members
-           });
-           copies[this.id] = copy;
-           return copy;
-         },
-         extent: function extent(resolver, memo) {
-           return resolver["transient"](this, 'extent', function () {
-             if (memo && memo[this.id]) return geoExtent();
-             memo = memo || {};
-             memo[this.id] = true;
-             var extent = geoExtent();
 
-             for (var i = 0; i < this.members.length; i++) {
-               var member = resolver.hasEntity(this.members[i].id);
+             function listCacheSet(key, value) {
+               var data = this.__data__,
+                   index = assocIndexOf(data, key);
 
-               if (member) {
-                 extent._extend(member.extent(resolver, memo));
+               if (index < 0) {
+                 ++this.size;
+                 data.push([key, value]);
+               } else {
+                 data[index][1] = value;
                }
-             }
 
-             return extent;
-           });
-         },
-         geometry: function geometry(graph) {
-           return graph["transient"](this, 'geometry', function () {
-             return this.isMultipolygon() ? 'area' : 'relation';
-           });
-         },
-         isDegenerate: function isDegenerate() {
-           return this.members.length === 0;
-         },
-         // Return an array of members, each extended with an 'index' property whose value
-         // is the member index.
-         indexedMembers: function indexedMembers() {
-           var result = new Array(this.members.length);
+               return this;
+             } // Add methods to `ListCache`.
 
-           for (var i = 0; i < this.members.length; i++) {
-             result[i] = Object.assign({}, this.members[i], {
-               index: i
-             });
-           }
 
-           return result;
-         },
-         // Return the first member with the given role. A copy of the member object
-         // is returned, extended with an 'index' property whose value is the member index.
-         memberByRole: function memberByRole(role) {
-           for (var i = 0; i < this.members.length; i++) {
-             if (this.members[i].role === role) {
-               return Object.assign({}, this.members[i], {
-                 index: i
-               });
-             }
-           }
-         },
-         // Same as memberByRole, but returns all members with the given role
-         membersByRole: function membersByRole(role) {
-           var result = [];
+             ListCache.prototype.clear = listCacheClear;
+             ListCache.prototype['delete'] = listCacheDelete;
+             ListCache.prototype.get = listCacheGet;
+             ListCache.prototype.has = listCacheHas;
+             ListCache.prototype.set = listCacheSet;
+             /*------------------------------------------------------------------------*/
 
-           for (var i = 0; i < this.members.length; i++) {
-             if (this.members[i].role === role) {
-               result.push(Object.assign({}, this.members[i], {
-                 index: i
-               }));
-             }
-           }
+             /**
+              * Creates a map cache object to store key-value pairs.
+              *
+              * @private
+              * @constructor
+              * @param {Array} [entries] The key-value pairs to cache.
+              */
 
-           return result;
-         },
-         // Return the first member with the given id. A copy of the member object
-         // is returned, extended with an 'index' property whose value is the member index.
-         memberById: function memberById(id) {
-           for (var i = 0; i < this.members.length; i++) {
-             if (this.members[i].id === id) {
-               return Object.assign({}, this.members[i], {
-                 index: i
-               });
+             function MapCache(entries) {
+               var index = -1,
+                   length = entries == null ? 0 : entries.length;
+               this.clear();
+
+               while (++index < length) {
+                 var entry = entries[index];
+                 this.set(entry[0], entry[1]);
+               }
              }
-           }
-         },
-         // Return the first member with the given id and role. A copy of the member object
-         // is returned, extended with an 'index' property whose value is the member index.
-         memberByIdAndRole: function memberByIdAndRole(id, role) {
-           for (var i = 0; i < this.members.length; i++) {
-             if (this.members[i].id === id && this.members[i].role === role) {
-               return Object.assign({}, this.members[i], {
-                 index: i
-               });
+             /**
+              * Removes all key-value entries from the map.
+              *
+              * @private
+              * @name clear
+              * @memberOf MapCache
+              */
+
+
+             function mapCacheClear() {
+               this.size = 0;
+               this.__data__ = {
+                 'hash': new Hash(),
+                 'map': new (Map || ListCache)(),
+                 'string': new Hash()
+               };
              }
-           }
-         },
-         addMember: function addMember(member, index) {
-           var members = this.members.slice();
-           members.splice(index === undefined ? members.length : index, 0, member);
-           return this.update({
-             members: members
-           });
-         },
-         updateMember: function updateMember(member, index) {
-           var members = this.members.slice();
-           members.splice(index, 1, Object.assign({}, members[index], member));
-           return this.update({
-             members: members
-           });
-         },
-         removeMember: function removeMember(index) {
-           var members = this.members.slice();
-           members.splice(index, 1);
-           return this.update({
-             members: members
-           });
-         },
-         removeMembersWithID: function removeMembersWithID(id) {
-           var members = this.members.filter(function (m) {
-             return m.id !== id;
-           });
-           return this.update({
-             members: members
-           });
-         },
-         moveMember: function moveMember(fromIndex, toIndex) {
-           var members = this.members.slice();
-           members.splice(toIndex, 0, members.splice(fromIndex, 1)[0]);
-           return this.update({
-             members: members
-           });
-         },
-         // Wherever a member appears with id `needle.id`, replace it with a member
-         // with id `replacement.id`, type `replacement.type`, and the original role,
-         // By default, adding a duplicate member (by id and role) is prevented.
-         // Return an updated relation.
-         replaceMember: function replaceMember(needle, replacement, keepDuplicates) {
-           if (!this.memberById(needle.id)) return this;
-           var members = [];
+             /**
+              * Removes `key` and its value from the map.
+              *
+              * @private
+              * @name delete
+              * @memberOf MapCache
+              * @param {string} key The key of the value to remove.
+              * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+              */
 
-           for (var i = 0; i < this.members.length; i++) {
-             var member = this.members[i];
 
-             if (member.id !== needle.id) {
-               members.push(member);
-             } else if (keepDuplicates || !this.memberByIdAndRole(replacement.id, member.role)) {
-               members.push({
-                 id: replacement.id,
-                 type: replacement.type,
-                 role: member.role
-               });
+             function mapCacheDelete(key) {
+               var result = getMapData(this, key)['delete'](key);
+               this.size -= result ? 1 : 0;
+               return result;
              }
-           }
+             /**
+              * Gets the map value for `key`.
+              *
+              * @private
+              * @name get
+              * @memberOf MapCache
+              * @param {string} key The key of the value to get.
+              * @returns {*} Returns the entry value.
+              */
 
-           return this.update({
-             members: members
-           });
-         },
-         asJXON: function asJXON(changeset_id) {
-           var r = {
-             relation: {
-               '@id': this.osmId(),
-               '@version': this.version || 0,
-               member: this.members.map(function (member) {
-                 return {
-                   keyAttributes: {
-                     type: member.type,
-                     role: member.role,
-                     ref: osmEntity.id.toOSM(member.id)
-                   }
-                 };
-               }, this),
-               tag: Object.keys(this.tags).map(function (k) {
-                 return {
-                   keyAttributes: {
-                     k: k,
-                     v: this.tags[k]
-                   }
-                 };
-               }, this)
+
+             function mapCacheGet(key) {
+               return getMapData(this, key).get(key);
              }
-           };
+             /**
+              * Checks if a map value for `key` exists.
+              *
+              * @private
+              * @name has
+              * @memberOf MapCache
+              * @param {string} key The key of the entry to check.
+              * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+              */
 
-           if (changeset_id) {
-             r.relation['@changeset'] = changeset_id;
-           }
 
-           return r;
-         },
-         asGeoJSON: function asGeoJSON(resolver) {
-           return resolver["transient"](this, 'GeoJSON', function () {
-             if (this.isMultipolygon()) {
-               return {
-                 type: 'MultiPolygon',
-                 coordinates: this.multipolygon(resolver)
-               };
-             } else {
-               return {
-                 type: 'FeatureCollection',
-                 properties: this.tags,
-                 features: this.members.map(function (member) {
-                   return Object.assign({
-                     role: member.role
-                   }, resolver.entity(member.id).asGeoJSON(resolver));
-                 })
-               };
+             function mapCacheHas(key) {
+               return getMapData(this, key).has(key);
              }
-           });
-         },
-         area: function area(resolver) {
-           return resolver["transient"](this, 'area', function () {
-             return d3_geoArea(this.asGeoJSON(resolver));
-           });
-         },
-         isMultipolygon: function isMultipolygon() {
-           return this.tags.type === 'multipolygon';
-         },
-         isComplete: function isComplete(resolver) {
-           for (var i = 0; i < this.members.length; i++) {
-             if (!resolver.hasEntity(this.members[i].id)) {
-               return false;
+             /**
+              * Sets the map `key` to `value`.
+              *
+              * @private
+              * @name set
+              * @memberOf MapCache
+              * @param {string} key The key of the value to set.
+              * @param {*} value The value to set.
+              * @returns {Object} Returns the map cache instance.
+              */
+
+
+             function mapCacheSet(key, value) {
+               var data = getMapData(this, key),
+                   size = data.size;
+               data.set(key, value);
+               this.size += data.size == size ? 0 : 1;
+               return this;
+             } // Add methods to `MapCache`.
+
+
+             MapCache.prototype.clear = mapCacheClear;
+             MapCache.prototype['delete'] = mapCacheDelete;
+             MapCache.prototype.get = mapCacheGet;
+             MapCache.prototype.has = mapCacheHas;
+             MapCache.prototype.set = mapCacheSet;
+             /*------------------------------------------------------------------------*/
+
+             /**
+              *
+              * Creates an array cache object to store unique values.
+              *
+              * @private
+              * @constructor
+              * @param {Array} [values] The values to cache.
+              */
+
+             function SetCache(values) {
+               var index = -1,
+                   length = values == null ? 0 : values.length;
+               this.__data__ = new MapCache();
+
+               while (++index < length) {
+                 this.add(values[index]);
+               }
              }
-           }
+             /**
+              * Adds `value` to the array cache.
+              *
+              * @private
+              * @name add
+              * @memberOf SetCache
+              * @alias push
+              * @param {*} value The value to cache.
+              * @returns {Object} Returns the cache instance.
+              */
 
-           return true;
-         },
-         hasFromViaTo: function hasFromViaTo() {
-           return this.members.some(function (m) {
-             return m.role === 'from';
-           }) && this.members.some(function (m) {
-             return m.role === 'via';
-           }) && this.members.some(function (m) {
-             return m.role === 'to';
-           });
-         },
-         isRestriction: function isRestriction() {
-           return !!(this.tags.type && this.tags.type.match(/^restriction:?/));
-         },
-         isValidRestriction: function isValidRestriction() {
-           if (!this.isRestriction()) return false;
-           var froms = this.members.filter(function (m) {
-             return m.role === 'from';
-           });
-           var vias = this.members.filter(function (m) {
-             return m.role === 'via';
-           });
-           var tos = this.members.filter(function (m) {
-             return m.role === 'to';
-           });
-           if (froms.length !== 1 && this.tags.restriction !== 'no_entry') return false;
-           if (froms.some(function (m) {
-             return m.type !== 'way';
-           })) return false;
-           if (tos.length !== 1 && this.tags.restriction !== 'no_exit') return false;
-           if (tos.some(function (m) {
-             return m.type !== 'way';
-           })) return false;
-           if (vias.length === 0) return false;
-           if (vias.length > 1 && vias.some(function (m) {
-             return m.type !== 'way';
-           })) return false;
-           return true;
-         },
-         // Returns an array [A0, ... An], each Ai being an array of node arrays [Nds0, ... Ndsm],
-         // where Nds0 is an outer ring and subsequent Ndsi's (if any i > 0) being inner rings.
-         //
-         // This corresponds to the structure needed for rendering a multipolygon path using a
-         // `evenodd` fill rule, as well as the structure of a GeoJSON MultiPolygon geometry.
-         //
-         // In the case of invalid geometries, this function will still return a result which
-         // includes the nodes of all way members, but some Nds may be unclosed and some inner
-         // rings not matched with the intended outer ring.
-         //
-         multipolygon: function multipolygon(resolver) {
-           var outers = this.members.filter(function (m) {
-             return 'outer' === (m.role || 'outer');
-           });
-           var inners = this.members.filter(function (m) {
-             return 'inner' === m.role;
-           });
-           outers = osmJoinWays(outers, resolver);
-           inners = osmJoinWays(inners, resolver);
 
-           var sequenceToLineString = function sequenceToLineString(sequence) {
-             if (sequence.nodes.length > 2 && sequence.nodes[0] !== sequence.nodes[sequence.nodes.length - 1]) {
-               // close unclosed parts to ensure correct area rendering - #2945
-               sequence.nodes.push(sequence.nodes[0]);
+             function setCacheAdd(value) {
+               this.__data__.set(value, HASH_UNDEFINED);
+
+               return this;
              }
+             /**
+              * Checks if `value` is in the array cache.
+              *
+              * @private
+              * @name has
+              * @memberOf SetCache
+              * @param {*} value The value to search for.
+              * @returns {number} Returns `true` if `value` is found, else `false`.
+              */
 
-             return sequence.nodes.map(function (node) {
-               return node.loc;
-             });
-           };
 
-           outers = outers.map(sequenceToLineString);
-           inners = inners.map(sequenceToLineString);
-           var result = outers.map(function (o) {
-             // Heuristic for detecting counterclockwise winding order. Assumes
-             // that OpenStreetMap polygons are not hemisphere-spanning.
-             return [d3_geoArea({
-               type: 'Polygon',
-               coordinates: [o]
-             }) > 2 * Math.PI ? o.reverse() : o];
-           });
+             function setCacheHas(value) {
+               return this.__data__.has(value);
+             } // Add methods to `SetCache`.
 
-           function findOuter(inner) {
-             var o, outer;
 
-             for (o = 0; o < outers.length; o++) {
-               outer = outers[o];
-               if (geoPolygonContainsPolygon(outer, inner)) return o;
+             SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
+             SetCache.prototype.has = setCacheHas;
+             /*------------------------------------------------------------------------*/
+
+             /**
+              * Creates a stack cache object to store key-value pairs.
+              *
+              * @private
+              * @constructor
+              * @param {Array} [entries] The key-value pairs to cache.
+              */
+
+             function Stack(entries) {
+               var data = this.__data__ = new ListCache(entries);
+               this.size = data.size;
              }
+             /**
+              * Removes all key-value entries from the stack.
+              *
+              * @private
+              * @name clear
+              * @memberOf Stack
+              */
 
-             for (o = 0; o < outers.length; o++) {
-               outer = outers[o];
-               if (geoPolygonIntersectsPolygon(outer, inner, false)) return o;
+
+             function stackClear() {
+               this.__data__ = new ListCache();
+               this.size = 0;
              }
-           }
+             /**
+              * Removes `key` and its value from the stack.
+              *
+              * @private
+              * @name delete
+              * @memberOf Stack
+              * @param {string} key The key of the value to remove.
+              * @returns {boolean} Returns `true` if the entry was removed, else `false`.
+              */
 
-           for (var i = 0; i < inners.length; i++) {
-             var inner = inners[i];
 
-             if (d3_geoArea({
-               type: 'Polygon',
-               coordinates: [inner]
-             }) < 2 * Math.PI) {
-               inner = inner.reverse();
+             function stackDelete(key) {
+               var data = this.__data__,
+                   result = data['delete'](key);
+               this.size = data.size;
+               return result;
              }
+             /**
+              * Gets the stack value for `key`.
+              *
+              * @private
+              * @name get
+              * @memberOf Stack
+              * @param {string} key The key of the value to get.
+              * @returns {*} Returns the entry value.
+              */
 
-             var o = findOuter(inners[i]);
 
-             if (o !== undefined) {
-               result[o].push(inners[i]);
-             } else {
-               result.push([inners[i]]); // Invalid geometry
+             function stackGet(key) {
+               return this.__data__.get(key);
              }
-           }
+             /**
+              * Checks if a stack value for `key` exists.
+              *
+              * @private
+              * @name has
+              * @memberOf Stack
+              * @param {string} key The key of the entry to check.
+              * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
+              */
 
-           return result;
-         }
-       });
 
-       var QAItem = /*#__PURE__*/function () {
-         function QAItem(loc, service, itemType, id, props) {
-           _classCallCheck(this, QAItem);
+             function stackHas(key) {
+               return this.__data__.has(key);
+             }
+             /**
+              * Sets the stack `key` to `value`.
+              *
+              * @private
+              * @name set
+              * @memberOf Stack
+              * @param {string} key The key of the value to set.
+              * @param {*} value The value to set.
+              * @returns {Object} Returns the stack cache instance.
+              */
 
-           // Store required properties
-           this.loc = loc;
-           this.service = service.title;
-           this.itemType = itemType; // All issues must have an ID for selection, use generic if none specified
 
-           this.id = id ? id : "".concat(QAItem.id());
-           this.update(props); // Some QA services have marker icons to differentiate issues
+             function stackSet(key, value) {
+               var data = this.__data__;
 
-           if (service && typeof service.getIcon === 'function') {
-             this.icon = service.getIcon(itemType);
-           }
-         }
+               if (data instanceof ListCache) {
+                 var pairs = data.__data__;
 
-         _createClass(QAItem, [{
-           key: "update",
-           value: function update(props) {
-             var _this = this;
+                 if (!Map || pairs.length < LARGE_ARRAY_SIZE - 1) {
+                   pairs.push([key, value]);
+                   this.size = ++data.size;
+                   return this;
+                 }
 
-             // You can't override this initial information
-             var loc = this.loc,
-                 service = this.service,
-                 itemType = this.itemType,
-                 id = this.id;
-             Object.keys(props).forEach(function (prop) {
-               return _this[prop] = props[prop];
-             });
-             this.loc = loc;
-             this.service = service;
-             this.itemType = itemType;
-             this.id = id;
-             return this;
-           } // Generic handling for newly created QAItems
+                 data = this.__data__ = new MapCache(pairs);
+               }
 
-         }], [{
-           key: "id",
-           value: function id() {
-             return this.nextId--;
-           }
-         }]);
+               data.set(key, value);
+               this.size = data.size;
+               return this;
+             } // Add methods to `Stack`.
 
-         return QAItem;
-       }();
-       QAItem.nextId = -1;
 
-       //
-       // Optionally, split only the given ways, if multiple ways share
-       // the given node.
-       //
-       // This is the inverse of `iD.actionJoin`.
-       //
-       // For testing convenience, accepts an ID to assign to the new way.
-       // Normally, this will be undefined and the way will automatically
-       // be assigned a new ID.
-       //
-       // Reference:
-       //   https://github.com/systemed/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/SplitWayAction.as
-       //
+             Stack.prototype.clear = stackClear;
+             Stack.prototype['delete'] = stackDelete;
+             Stack.prototype.get = stackGet;
+             Stack.prototype.has = stackHas;
+             Stack.prototype.set = stackSet;
+             /*------------------------------------------------------------------------*/
 
-       function actionSplit(nodeIds, newWayIds) {
-         // accept single ID for backwards-compatiblity
-         if (typeof nodeIds === 'string') nodeIds = [nodeIds];
+             /**
+              * Creates an array of the enumerable property names of the array-like `value`.
+              *
+              * @private
+              * @param {*} value The value to query.
+              * @param {boolean} inherited Specify returning inherited property names.
+              * @returns {Array} Returns the array of property names.
+              */
 
-         var _wayIDs; // the strategy for picking which way will have a new version and which way is newly created
+             function arrayLikeKeys(value, inherited) {
+               var isArr = isArray(value),
+                   isArg = !isArr && isArguments(value),
+                   isBuff = !isArr && !isArg && isBuffer(value),
+                   isType = !isArr && !isArg && !isBuff && isTypedArray(value),
+                   skipIndexes = isArr || isArg || isBuff || isType,
+                   result = skipIndexes ? baseTimes(value.length, String) : [],
+                   length = result.length;
+
+               for (var key in value) {
+                 if ((inherited || hasOwnProperty.call(value, key)) && !(skipIndexes && ( // Safari 9 has enumerable `arguments.length` in strict mode.
+                 key == 'length' || // Node.js 0.10 has enumerable non-index properties on buffers.
+                 isBuff && (key == 'offset' || key == 'parent') || // PhantomJS 2 has enumerable non-index properties on typed arrays.
+                 isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset') || // Skip index properties.
+                 isIndex(key, length)))) {
+                   result.push(key);
+                 }
+               }
 
+               return result;
+             }
+             /**
+              * A specialized version of `_.sample` for arrays.
+              *
+              * @private
+              * @param {Array} array The array to sample.
+              * @returns {*} Returns the random element.
+              */
 
-         var _keepHistoryOn = 'longest'; // 'longest', 'first'
-         // The IDs of the ways actually created by running this action
 
-         var _createdWayIDs = [];
+             function arraySample(array) {
+               var length = array.length;
+               return length ? array[baseRandom(0, length - 1)] : undefined$1;
+             }
+             /**
+              * A specialized version of `_.sampleSize` for arrays.
+              *
+              * @private
+              * @param {Array} array The array to sample.
+              * @param {number} n The number of elements to sample.
+              * @returns {Array} Returns the random elements.
+              */
 
-         function dist(graph, nA, nB) {
-           var locA = graph.entity(nA).loc;
-           var locB = graph.entity(nB).loc;
-           var epsilon = 1e-6;
-           return locA && locB ? geoSphericalDistance(locA, locB) : epsilon;
-         } // If the way is closed, we need to search for a partner node
-         // to split the way at.
-         //
-         // The following looks for a node that is both far away from
-         // the initial node in terms of way segment length and nearby
-         // in terms of beeline-distance. This assures that areas get
-         // split on the most "natural" points (independent of the number
-         // of nodes).
-         // For example: bone-shaped areas get split across their waist
-         // line, circles across the diameter.
 
+             function arraySampleSize(array, n) {
+               return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
+             }
+             /**
+              * A specialized version of `_.shuffle` for arrays.
+              *
+              * @private
+              * @param {Array} array The array to shuffle.
+              * @returns {Array} Returns the new shuffled array.
+              */
 
-         function splitArea(nodes, idxA, graph) {
-           var lengths = new Array(nodes.length);
-           var length;
-           var i;
-           var best = 0;
-           var idxB;
 
-           function wrap(index) {
-             return utilWrap(index, nodes.length);
-           } // calculate lengths
+             function arrayShuffle(array) {
+               return shuffleSelf(copyArray(array));
+             }
+             /**
+              * This function is like `assignValue` except that it doesn't assign
+              * `undefined` values.
+              *
+              * @private
+              * @param {Object} object The object to modify.
+              * @param {string} key The key of the property to assign.
+              * @param {*} value The value to assign.
+              */
 
 
-           length = 0;
+             function assignMergeValue(object, key, value) {
+               if (value !== undefined$1 && !eq(object[key], value) || value === undefined$1 && !(key in object)) {
+                 baseAssignValue(object, key, value);
+               }
+             }
+             /**
+              * Assigns `value` to `key` of `object` if the existing value is not equivalent
+              * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * for equality comparisons.
+              *
+              * @private
+              * @param {Object} object The object to modify.
+              * @param {string} key The key of the property to assign.
+              * @param {*} value The value to assign.
+              */
 
-           for (i = wrap(idxA + 1); i !== idxA; i = wrap(i + 1)) {
-             length += dist(graph, nodes[i], nodes[wrap(i - 1)]);
-             lengths[i] = length;
-           }
 
-           length = 0;
+             function assignValue(object, key, value) {
+               var objValue = object[key];
+
+               if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) || value === undefined$1 && !(key in object)) {
+                 baseAssignValue(object, key, value);
+               }
+             }
+             /**
+              * Gets the index at which the `key` is found in `array` of key-value pairs.
+              *
+              * @private
+              * @param {Array} array The array to inspect.
+              * @param {*} key The key to search for.
+              * @returns {number} Returns the index of the matched value, else `-1`.
+              */
+
+
+             function assocIndexOf(array, key) {
+               var length = array.length;
+
+               while (length--) {
+                 if (eq(array[length][0], key)) {
+                   return length;
+                 }
+               }
+
+               return -1;
+             }
+             /**
+              * Aggregates elements of `collection` on `accumulator` with keys transformed
+              * by `iteratee` and values set by `setter`.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} setter The function to set `accumulator` values.
+              * @param {Function} iteratee The iteratee to transform keys.
+              * @param {Object} accumulator The initial aggregated object.
+              * @returns {Function} Returns `accumulator`.
+              */
+
+
+             function baseAggregator(collection, setter, iteratee, accumulator) {
+               baseEach(collection, function (value, key, collection) {
+                 setter(accumulator, value, iteratee(value), collection);
+               });
+               return accumulator;
+             }
+             /**
+              * The base implementation of `_.assign` without support for multiple sources
+              * or `customizer` functions.
+              *
+              * @private
+              * @param {Object} object The destination object.
+              * @param {Object} source The source object.
+              * @returns {Object} Returns `object`.
+              */
+
+
+             function baseAssign(object, source) {
+               return object && copyObject(source, keys(source), object);
+             }
+             /**
+              * The base implementation of `_.assignIn` without support for multiple sources
+              * or `customizer` functions.
+              *
+              * @private
+              * @param {Object} object The destination object.
+              * @param {Object} source The source object.
+              * @returns {Object} Returns `object`.
+              */
 
-           for (i = wrap(idxA - 1); i !== idxA; i = wrap(i - 1)) {
-             length += dist(graph, nodes[i], nodes[wrap(i + 1)]);
 
-             if (length < lengths[i]) {
-               lengths[i] = length;
+             function baseAssignIn(object, source) {
+               return object && copyObject(source, keysIn(source), object);
              }
-           } // determine best opposite node to split
-
+             /**
+              * The base implementation of `assignValue` and `assignMergeValue` without
+              * value checks.
+              *
+              * @private
+              * @param {Object} object The object to modify.
+              * @param {string} key The key of the property to assign.
+              * @param {*} value The value to assign.
+              */
 
-           for (i = 0; i < nodes.length; i++) {
-             var cost = lengths[i] / dist(graph, nodes[idxA], nodes[i]);
 
-             if (cost > best) {
-               idxB = i;
-               best = cost;
+             function baseAssignValue(object, key, value) {
+               if (key == '__proto__' && defineProperty) {
+                 defineProperty(object, key, {
+                   'configurable': true,
+                   'enumerable': true,
+                   'value': value,
+                   'writable': true
+                 });
+               } else {
+                 object[key] = value;
+               }
              }
-           }
+             /**
+              * The base implementation of `_.at` without support for individual paths.
+              *
+              * @private
+              * @param {Object} object The object to iterate over.
+              * @param {string[]} paths The property paths to pick.
+              * @returns {Array} Returns the picked elements.
+              */
 
-           return idxB;
-         }
 
-         function totalLengthBetweenNodes(graph, nodes) {
-           var totalLength = 0;
+             function baseAt(object, paths) {
+               var index = -1,
+                   length = paths.length,
+                   result = Array(length),
+                   skip = object == null;
 
-           for (var i = 0; i < nodes.length - 1; i++) {
-             totalLength += dist(graph, nodes[i], nodes[i + 1]);
-           }
+               while (++index < length) {
+                 result[index] = skip ? undefined$1 : get(object, paths[index]);
+               }
 
-           return totalLength;
-         }
+               return result;
+             }
+             /**
+              * The base implementation of `_.clamp` which doesn't coerce arguments.
+              *
+              * @private
+              * @param {number} number The number to clamp.
+              * @param {number} [lower] The lower bound.
+              * @param {number} upper The upper bound.
+              * @returns {number} Returns the clamped number.
+              */
 
-         function split(graph, nodeId, wayA, newWayId) {
-           var wayB = osmWay({
-             id: newWayId,
-             tags: wayA.tags
-           }); // `wayB` is the NEW way
 
-           var origNodes = wayA.nodes.slice();
-           var nodesA;
-           var nodesB;
-           var isArea = wayA.isArea();
-           var isOuter = osmIsOldMultipolygonOuterMember(wayA, graph);
+             function baseClamp(number, lower, upper) {
+               if (number === number) {
+                 if (upper !== undefined$1) {
+                   number = number <= upper ? number : upper;
+                 }
 
-           if (wayA.isClosed()) {
-             var nodes = wayA.nodes.slice(0, -1);
-             var idxA = nodes.indexOf(nodeId);
-             var idxB = splitArea(nodes, idxA, graph);
+                 if (lower !== undefined$1) {
+                   number = number >= lower ? number : lower;
+                 }
+               }
 
-             if (idxB < idxA) {
-               nodesA = nodes.slice(idxA).concat(nodes.slice(0, idxB + 1));
-               nodesB = nodes.slice(idxB, idxA + 1);
-             } else {
-               nodesA = nodes.slice(idxA, idxB + 1);
-               nodesB = nodes.slice(idxB).concat(nodes.slice(0, idxA + 1));
+               return number;
              }
-           } else {
-             var idx = wayA.nodes.indexOf(nodeId, 1);
-             nodesA = wayA.nodes.slice(0, idx + 1);
-             nodesB = wayA.nodes.slice(idx);
-           }
+             /**
+              * The base implementation of `_.clone` and `_.cloneDeep` which tracks
+              * traversed objects.
+              *
+              * @private
+              * @param {*} value The value to clone.
+              * @param {boolean} bitmask The bitmask flags.
+              *  1 - Deep clone
+              *  2 - Flatten inherited properties
+              *  4 - Clone symbols
+              * @param {Function} [customizer] The function to customize cloning.
+              * @param {string} [key] The key of `value`.
+              * @param {Object} [object] The parent object of `value`.
+              * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
+              * @returns {*} Returns the cloned value.
+              */
 
-           var lengthA = totalLengthBetweenNodes(graph, nodesA);
-           var lengthB = totalLengthBetweenNodes(graph, nodesB);
 
-           if (_keepHistoryOn === 'longest' && lengthB > lengthA) {
-             // keep the history on the longer way, regardless of the node count
-             wayA = wayA.update({
-               nodes: nodesB
-             });
-             wayB = wayB.update({
-               nodes: nodesA
-             });
-             var temp = lengthA;
-             lengthA = lengthB;
-             lengthB = temp;
-           } else {
-             wayA = wayA.update({
-               nodes: nodesA
-             });
-             wayB = wayB.update({
-               nodes: nodesB
-             });
-           }
+             function baseClone(value, bitmask, customizer, key, object, stack) {
+               var result,
+                   isDeep = bitmask & CLONE_DEEP_FLAG,
+                   isFlat = bitmask & CLONE_FLAT_FLAG,
+                   isFull = bitmask & CLONE_SYMBOLS_FLAG;
 
-           if (wayA.tags.step_count) {
-             // divide up the the step count proportionally between the two ways
-             var stepCount = parseFloat(wayA.tags.step_count);
+               if (customizer) {
+                 result = object ? customizer(value, key, object, stack) : customizer(value);
+               }
 
-             if (stepCount && // ensure a number
-             isFinite(stepCount) && // ensure positive
-             stepCount > 0 && // ensure integer
-             Math.round(stepCount) === stepCount) {
-               var tagsA = Object.assign({}, wayA.tags);
-               var tagsB = Object.assign({}, wayB.tags);
-               var ratioA = lengthA / (lengthA + lengthB);
-               var countA = Math.round(stepCount * ratioA);
-               tagsA.step_count = countA.toString();
-               tagsB.step_count = (stepCount - countA).toString();
-               wayA = wayA.update({
-                 tags: tagsA
-               });
-               wayB = wayB.update({
-                 tags: tagsB
-               });
-             }
-           }
+               if (result !== undefined$1) {
+                 return result;
+               }
 
-           graph = graph.replace(wayA);
-           graph = graph.replace(wayB);
-           graph.parentRelations(wayA).forEach(function (relation) {
-             var member; // Turn restrictions - make sure:
-             // 1. Splitting a FROM/TO way - only `wayA` OR `wayB` remains in relation
-             //    (whichever one is connected to the VIA node/ways)
-             // 2. Splitting a VIA way - `wayB` remains in relation as a VIA way
+               if (!isObject(value)) {
+                 return value;
+               }
 
-             if (relation.hasFromViaTo()) {
-               var f = relation.memberByRole('from');
-               var v = relation.membersByRole('via');
-               var t = relation.memberByRole('to');
-               var i; // 1. split a FROM/TO
+               var isArr = isArray(value);
 
-               if (f.id === wayA.id || t.id === wayA.id) {
-                 var keepB = false;
+               if (isArr) {
+                 result = initCloneArray(value);
 
-                 if (v.length === 1 && v[0].type === 'node') {
-                   // check via node
-                   keepB = wayB.contains(v[0].id);
-                 } else {
-                   // check via way(s)
-                   for (i = 0; i < v.length; i++) {
-                     if (v[i].type === 'way') {
-                       var wayVia = graph.hasEntity(v[i].id);
+                 if (!isDeep) {
+                   return copyArray(value, result);
+                 }
+               } else {
+                 var tag = getTag(value),
+                     isFunc = tag == funcTag || tag == genTag;
 
-                       if (wayVia && utilArrayIntersection(wayB.nodes, wayVia.nodes).length) {
-                         keepB = true;
-                         break;
-                       }
-                     }
-                   }
+                 if (isBuffer(value)) {
+                   return cloneBuffer(value, isDeep);
                  }
 
-                 if (keepB) {
-                   relation = relation.replaceMember(wayA, wayB);
-                   graph = graph.replace(relation);
-                 } // 2. split a VIA
+                 if (tag == objectTag || tag == argsTag || isFunc && !object) {
+                   result = isFlat || isFunc ? {} : initCloneObject(value);
 
-               } else {
-                 for (i = 0; i < v.length; i++) {
-                   if (v[i].type === 'way' && v[i].id === wayA.id) {
-                     member = {
-                       id: wayB.id,
-                       type: 'way',
-                       role: 'via'
-                     };
-                     graph = actionAddMember(relation.id, member, v[i].index + 1)(graph);
-                     break;
+                   if (!isDeep) {
+                     return isFlat ? copySymbolsIn(value, baseAssignIn(result, value)) : copySymbols(value, baseAssign(result, value));
+                   }
+                 } else {
+                   if (!cloneableTags[tag]) {
+                     return object ? value : {};
                    }
+
+                   result = initCloneByTag(value, tag, isDeep);
                  }
-               } // All other relations (Routes, Multipolygons, etc):
-               // 1. Both `wayA` and `wayB` remain in the relation
-               // 2. But must be inserted as a pair (see `actionAddMember` for details)
+               } // Check for circular references and return its corresponding clone.
 
-             } else {
-               if (relation === isOuter) {
-                 graph = graph.replace(relation.mergeTags(wayA.tags));
-                 graph = graph.replace(wayA.update({
-                   tags: {}
-                 }));
-                 graph = graph.replace(wayB.update({
-                   tags: {}
-                 }));
+
+               stack || (stack = new Stack());
+               var stacked = stack.get(value);
+
+               if (stacked) {
+                 return stacked;
                }
 
-               member = {
-                 id: wayB.id,
-                 type: 'way',
-                 role: relation.memberById(wayA.id).role
-               };
-               var insertPair = {
-                 originalID: wayA.id,
-                 insertedID: wayB.id,
-                 nodes: origNodes
+               stack.set(value, result);
+
+               if (isSet(value)) {
+                 value.forEach(function (subValue) {
+                   result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
+                 });
+               } else if (isMap(value)) {
+                 value.forEach(function (subValue, key) {
+                   result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
+                 });
+               }
+
+               var keysFunc = isFull ? isFlat ? getAllKeysIn : getAllKeys : isFlat ? keysIn : keys;
+               var props = isArr ? undefined$1 : keysFunc(value);
+               arrayEach(props || value, function (subValue, key) {
+                 if (props) {
+                   key = subValue;
+                   subValue = value[key];
+                 } // Recursively populate clone (susceptible to call stack limits).
+
+
+                 assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
+               });
+               return result;
+             }
+             /**
+              * The base implementation of `_.conforms` which doesn't clone `source`.
+              *
+              * @private
+              * @param {Object} source The object of property predicates to conform to.
+              * @returns {Function} Returns the new spec function.
+              */
+
+
+             function baseConforms(source) {
+               var props = keys(source);
+               return function (object) {
+                 return baseConformsTo(object, source, props);
                };
-               graph = actionAddMember(relation.id, member, undefined, insertPair)(graph);
              }
-           });
+             /**
+              * The base implementation of `_.conformsTo` which accepts `props` to check.
+              *
+              * @private
+              * @param {Object} object The object to inspect.
+              * @param {Object} source The object of property predicates to conform to.
+              * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+              */
 
-           if (!isOuter && isArea) {
-             var multipolygon = osmRelation({
-               tags: Object.assign({}, wayA.tags, {
-                 type: 'multipolygon'
-               }),
-               members: [{
-                 id: wayA.id,
-                 role: 'outer',
-                 type: 'way'
-               }, {
-                 id: wayB.id,
-                 role: 'outer',
-                 type: 'way'
-               }]
-             });
-             graph = graph.replace(multipolygon);
-             graph = graph.replace(wayA.update({
-               tags: {}
-             }));
-             graph = graph.replace(wayB.update({
-               tags: {}
-             }));
-           }
 
-           _createdWayIDs.push(wayB.id);
+             function baseConformsTo(object, source, props) {
+               var length = props.length;
 
-           return graph;
-         }
+               if (object == null) {
+                 return !length;
+               }
 
-         var action = function action(graph) {
-           _createdWayIDs = [];
-           var newWayIndex = 0;
+               object = Object(object);
 
-           for (var i = 0; i < nodeIds.length; i++) {
-             var nodeId = nodeIds[i];
-             var candidates = action.waysForNode(nodeId, graph);
+               while (length--) {
+                 var key = props[length],
+                     predicate = source[key],
+                     value = object[key];
 
-             for (var j = 0; j < candidates.length; j++) {
-               graph = split(graph, nodeId, candidates[j], newWayIds && newWayIds[newWayIndex]);
-               newWayIndex += 1;
+                 if (value === undefined$1 && !(key in object) || !predicate(value)) {
+                   return false;
+                 }
+               }
+
+               return true;
              }
-           }
+             /**
+              * The base implementation of `_.delay` and `_.defer` which accepts `args`
+              * to provide to `func`.
+              *
+              * @private
+              * @param {Function} func The function to delay.
+              * @param {number} wait The number of milliseconds to delay invocation.
+              * @param {Array} args The arguments to provide to `func`.
+              * @returns {number|Object} Returns the timer id or timeout object.
+              */
 
-           return graph;
-         };
 
-         action.getCreatedWayIDs = function () {
-           return _createdWayIDs;
-         };
+             function baseDelay(func, wait, args) {
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-         action.waysForNode = function (nodeId, graph) {
-           var node = graph.entity(nodeId);
-           var splittableParents = graph.parentWays(node).filter(isSplittable);
+               return setTimeout(function () {
+                 func.apply(undefined$1, args);
+               }, wait);
+             }
+             /**
+              * The base implementation of methods like `_.difference` without support
+              * for excluding multiple arrays or iteratee shorthands.
+              *
+              * @private
+              * @param {Array} array The array to inspect.
+              * @param {Array} values The values to exclude.
+              * @param {Function} [iteratee] The iteratee invoked per element.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns the new array of filtered values.
+              */
 
-           if (!_wayIDs) {
-             // If the ways to split aren't specified, only split the lines.
-             // If there are no lines to split, split the areas.
-             var hasLine = splittableParents.some(function (parent) {
-               return parent.geometry(graph) === 'line';
-             });
 
-             if (hasLine) {
-               return splittableParents.filter(function (parent) {
-                 return parent.geometry(graph) === 'line';
-               });
-             }
-           }
+             function baseDifference(array, values, iteratee, comparator) {
+               var index = -1,
+                   includes = arrayIncludes,
+                   isCommon = true,
+                   length = array.length,
+                   result = [],
+                   valuesLength = values.length;
 
-           return splittableParents;
+               if (!length) {
+                 return result;
+               }
 
-           function isSplittable(parent) {
-             // If the ways to split are specified, ignore everything else.
-             if (_wayIDs && _wayIDs.indexOf(parent.id) === -1) return false; // We can fake splitting closed ways at their endpoints...
+               if (iteratee) {
+                 values = arrayMap(values, baseUnary(iteratee));
+               }
 
-             if (parent.isClosed()) return true; // otherwise, we can't split nodes at their endpoints.
+               if (comparator) {
+                 includes = arrayIncludesWith;
+                 isCommon = false;
+               } else if (values.length >= LARGE_ARRAY_SIZE) {
+                 includes = cacheHas;
+                 isCommon = false;
+                 values = new SetCache(values);
+               }
 
-             for (var i = 1; i < parent.nodes.length - 1; i++) {
-               if (parent.nodes[i] === nodeId) return true;
-             }
+               outer: while (++index < length) {
+                 var value = array[index],
+                     computed = iteratee == null ? value : iteratee(value);
+                 value = comparator || value !== 0 ? value : 0;
 
-             return false;
-           }
-         };
+                 if (isCommon && computed === computed) {
+                   var valuesIndex = valuesLength;
 
-         action.ways = function (graph) {
-           return utilArrayUniq([].concat.apply([], nodeIds.map(function (nodeId) {
-             return action.waysForNode(nodeId, graph);
-           })));
-         };
+                   while (valuesIndex--) {
+                     if (values[valuesIndex] === computed) {
+                       continue outer;
+                     }
+                   }
 
-         action.disabled = function (graph) {
-           for (var i = 0; i < nodeIds.length; i++) {
-             var nodeId = nodeIds[i];
-             var candidates = action.waysForNode(nodeId, graph);
+                   result.push(value);
+                 } else if (!includes(values, computed, comparator)) {
+                   result.push(value);
+                 }
+               }
 
-             if (candidates.length === 0 || _wayIDs && _wayIDs.length !== candidates.length) {
-               return 'not_eligible';
+               return result;
              }
-           }
-         };
+             /**
+              * The base implementation of `_.forEach` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} iteratee The function invoked per iteration.
+              * @returns {Array|Object} Returns `collection`.
+              */
 
-         action.limitWays = function (val) {
-           if (!arguments.length) return _wayIDs;
-           _wayIDs = val;
-           return action;
-         };
 
-         action.keepHistoryOn = function (val) {
-           if (!arguments.length) return _keepHistoryOn;
-           _keepHistoryOn = val;
-           return action;
-         };
+             var baseEach = createBaseEach(baseForOwn);
+             /**
+              * The base implementation of `_.forEachRight` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} iteratee The function invoked per iteration.
+              * @returns {Array|Object} Returns `collection`.
+              */
 
-         return action;
-       }
+             var baseEachRight = createBaseEach(baseForOwnRight, true);
+             /**
+              * The base implementation of `_.every` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} predicate The function invoked per iteration.
+              * @returns {boolean} Returns `true` if all elements pass the predicate check,
+              *  else `false`
+              */
 
-       function coreGraph(other, mutable) {
-         if (!(this instanceof coreGraph)) return new coreGraph(other, mutable);
+             function baseEvery(collection, predicate) {
+               var result = true;
+               baseEach(collection, function (value, index, collection) {
+                 result = !!predicate(value, index, collection);
+                 return result;
+               });
+               return result;
+             }
+             /**
+              * The base implementation of methods like `_.max` and `_.min` which accepts a
+              * `comparator` to determine the extremum value.
+              *
+              * @private
+              * @param {Array} array The array to iterate over.
+              * @param {Function} iteratee The iteratee invoked per iteration.
+              * @param {Function} comparator The comparator used to compare values.
+              * @returns {*} Returns the extremum value.
+              */
 
-         if (other instanceof coreGraph) {
-           var base = other.base();
-           this.entities = Object.assign(Object.create(base.entities), other.entities);
-           this._parentWays = Object.assign(Object.create(base.parentWays), other._parentWays);
-           this._parentRels = Object.assign(Object.create(base.parentRels), other._parentRels);
-         } else {
-           this.entities = Object.create({});
-           this._parentWays = Object.create({});
-           this._parentRels = Object.create({});
-           this.rebase(other || [], [this]);
-         }
 
-         this.transients = {};
-         this._childNodes = {};
-         this.frozen = !mutable;
-       }
-       coreGraph.prototype = {
-         hasEntity: function hasEntity(id) {
-           return this.entities[id];
-         },
-         entity: function entity(id) {
-           var entity = this.entities[id]; //https://github.com/openstreetmap/iD/issues/3973#issuecomment-307052376
+             function baseExtremum(array, iteratee, comparator) {
+               var index = -1,
+                   length = array.length;
 
-           if (!entity) {
-             entity = this.entities.__proto__[id]; // eslint-disable-line no-proto
-           }
+               while (++index < length) {
+                 var value = array[index],
+                     current = iteratee(value);
 
-           if (!entity) {
-             throw new Error('entity ' + id + ' not found');
-           }
+                 if (current != null && (computed === undefined$1 ? current === current && !isSymbol(current) : comparator(current, computed))) {
+                   var computed = current,
+                       result = value;
+                 }
+               }
 
-           return entity;
-         },
-         geometry: function geometry(id) {
-           return this.entity(id).geometry(this);
-         },
-         "transient": function transient(entity, key, fn) {
-           var id = entity.id;
-           var transients = this.transients[id] || (this.transients[id] = {});
+               return result;
+             }
+             /**
+              * The base implementation of `_.fill` without an iteratee call guard.
+              *
+              * @private
+              * @param {Array} array The array to fill.
+              * @param {*} value The value to fill `array` with.
+              * @param {number} [start=0] The start position.
+              * @param {number} [end=array.length] The end position.
+              * @returns {Array} Returns `array`.
+              */
 
-           if (transients[key] !== undefined) {
-             return transients[key];
-           }
 
-           transients[key] = fn.call(entity);
-           return transients[key];
-         },
-         parentWays: function parentWays(entity) {
-           var parents = this._parentWays[entity.id];
-           var result = [];
+             function baseFill(array, value, start, end) {
+               var length = array.length;
+               start = toInteger(start);
 
-           if (parents) {
-             parents.forEach(function (id) {
-               result.push(this.entity(id));
-             }, this);
-           }
+               if (start < 0) {
+                 start = -start > length ? 0 : length + start;
+               }
 
-           return result;
-         },
-         isPoi: function isPoi(entity) {
-           var parents = this._parentWays[entity.id];
-           return !parents || parents.size === 0;
-         },
-         isShared: function isShared(entity) {
-           var parents = this._parentWays[entity.id];
-           return parents && parents.size > 1;
-         },
-         parentRelations: function parentRelations(entity) {
-           var parents = this._parentRels[entity.id];
-           var result = [];
+               end = end === undefined$1 || end > length ? length : toInteger(end);
 
-           if (parents) {
-             parents.forEach(function (id) {
-               result.push(this.entity(id));
-             }, this);
-           }
+               if (end < 0) {
+                 end += length;
+               }
 
-           return result;
-         },
-         parentMultipolygons: function parentMultipolygons(entity) {
-           return this.parentRelations(entity).filter(function (relation) {
-             return relation.isMultipolygon();
-           });
-         },
-         childNodes: function childNodes(entity) {
-           if (this._childNodes[entity.id]) return this._childNodes[entity.id];
-           if (!entity.nodes) return [];
-           var nodes = [];
+               end = start > end ? 0 : toLength(end);
 
-           for (var i = 0; i < entity.nodes.length; i++) {
-             nodes[i] = this.entity(entity.nodes[i]);
-           }
-           this._childNodes[entity.id] = nodes;
-           return this._childNodes[entity.id];
-         },
-         base: function base() {
-           return {
-             'entities': Object.getPrototypeOf(this.entities),
-             'parentWays': Object.getPrototypeOf(this._parentWays),
-             'parentRels': Object.getPrototypeOf(this._parentRels)
-           };
-         },
-         // Unlike other graph methods, rebase mutates in place. This is because it
-         // is used only during the history operation that merges newly downloaded
-         // data into each state. To external consumers, it should appear as if the
-         // graph always contained the newly downloaded data.
-         rebase: function rebase(entities, stack, force) {
-           var base = this.base();
-           var i, j, k, id;
+               while (start < end) {
+                 array[start++] = value;
+               }
 
-           for (i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             if (!entity.visible || !force && base.entities[entity.id]) continue; // Merging data into the base graph
+               return array;
+             }
+             /**
+              * The base implementation of `_.filter` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} predicate The function invoked per iteration.
+              * @returns {Array} Returns the new filtered array.
+              */
 
-             base.entities[entity.id] = entity;
 
-             this._updateCalculated(undefined, entity, base.parentWays, base.parentRels); // Restore provisionally-deleted nodes that are discovered to have an extant parent
+             function baseFilter(collection, predicate) {
+               var result = [];
+               baseEach(collection, function (value, index, collection) {
+                 if (predicate(value, index, collection)) {
+                   result.push(value);
+                 }
+               });
+               return result;
+             }
+             /**
+              * The base implementation of `_.flatten` with support for restricting flattening.
+              *
+              * @private
+              * @param {Array} array The array to flatten.
+              * @param {number} depth The maximum recursion depth.
+              * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
+              * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
+              * @param {Array} [result=[]] The initial result value.
+              * @returns {Array} Returns the new flattened array.
+              */
 
 
-             if (entity.type === 'way') {
-               for (j = 0; j < entity.nodes.length; j++) {
-                 id = entity.nodes[j];
+             function baseFlatten(array, depth, predicate, isStrict, result) {
+               var index = -1,
+                   length = array.length;
+               predicate || (predicate = isFlattenable);
+               result || (result = []);
 
-                 for (k = 1; k < stack.length; k++) {
-                   var ents = stack[k].entities;
+               while (++index < length) {
+                 var value = array[index];
 
-                   if (ents.hasOwnProperty(id) && ents[id] === undefined) {
-                     delete ents[id];
+                 if (depth > 0 && predicate(value)) {
+                   if (depth > 1) {
+                     // Recursively flatten arrays (susceptible to call stack limits).
+                     baseFlatten(value, depth - 1, predicate, isStrict, result);
+                   } else {
+                     arrayPush(result, value);
                    }
+                 } else if (!isStrict) {
+                   result[result.length] = value;
                  }
                }
-             }
-           }
 
-           for (i = 0; i < stack.length; i++) {
-             stack[i]._updateRebased();
-           }
-         },
-         _updateRebased: function _updateRebased() {
-           var base = this.base();
-           Object.keys(this._parentWays).forEach(function (child) {
-             if (base.parentWays[child]) {
-               base.parentWays[child].forEach(function (id) {
-                 if (!this.entities.hasOwnProperty(id)) {
-                   this._parentWays[child].add(id);
-                 }
-               }, this);
-             }
-           }, this);
-           Object.keys(this._parentRels).forEach(function (child) {
-             if (base.parentRels[child]) {
-               base.parentRels[child].forEach(function (id) {
-                 if (!this.entities.hasOwnProperty(id)) {
-                   this._parentRels[child].add(id);
-                 }
-               }, this);
+               return result;
              }
-           }, this);
-           this.transients = {}; // this._childNodes is not updated, under the assumption that
-           // ways are always downloaded with their child nodes.
-         },
-         // Updates calculated properties (parentWays, parentRels) for the specified change
-         _updateCalculated: function _updateCalculated(oldentity, entity, parentWays, parentRels) {
-           parentWays = parentWays || this._parentWays;
-           parentRels = parentRels || this._parentRels;
-           var type = entity && entity.type || oldentity && oldentity.type;
-           var removed, added, i;
+             /**
+              * The base implementation of `baseForOwn` which iterates over `object`
+              * properties returned by `keysFunc` and invokes `iteratee` for each property.
+              * Iteratee functions may exit iteration early by explicitly returning `false`.
+              *
+              * @private
+              * @param {Object} object The object to iterate over.
+              * @param {Function} iteratee The function invoked per iteration.
+              * @param {Function} keysFunc The function to get the keys of `object`.
+              * @returns {Object} Returns `object`.
+              */
+
+
+             var baseFor = createBaseFor();
+             /**
+              * This function is like `baseFor` except that it iterates over properties
+              * in the opposite order.
+              *
+              * @private
+              * @param {Object} object The object to iterate over.
+              * @param {Function} iteratee The function invoked per iteration.
+              * @param {Function} keysFunc The function to get the keys of `object`.
+              * @returns {Object} Returns `object`.
+              */
+
+             var baseForRight = createBaseFor(true);
+             /**
+              * The base implementation of `_.forOwn` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Object} object The object to iterate over.
+              * @param {Function} iteratee The function invoked per iteration.
+              * @returns {Object} Returns `object`.
+              */
 
-           if (type === 'way') {
-             // Update parentWays
-             if (oldentity && entity) {
-               removed = utilArrayDifference(oldentity.nodes, entity.nodes);
-               added = utilArrayDifference(entity.nodes, oldentity.nodes);
-             } else if (oldentity) {
-               removed = oldentity.nodes;
-               added = [];
-             } else if (entity) {
-               removed = [];
-               added = entity.nodes;
+             function baseForOwn(object, iteratee) {
+               return object && baseFor(object, iteratee, keys);
              }
+             /**
+              * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Object} object The object to iterate over.
+              * @param {Function} iteratee The function invoked per iteration.
+              * @returns {Object} Returns `object`.
+              */
 
-             for (i = 0; i < removed.length; i++) {
-               // make a copy of prototype property, store as own property, and update..
-               parentWays[removed[i]] = new Set(parentWays[removed[i]]);
-               parentWays[removed[i]]["delete"](oldentity.id);
+
+             function baseForOwnRight(object, iteratee) {
+               return object && baseForRight(object, iteratee, keys);
              }
+             /**
+              * The base implementation of `_.functions` which creates an array of
+              * `object` function property names filtered from `props`.
+              *
+              * @private
+              * @param {Object} object The object to inspect.
+              * @param {Array} props The property names to filter.
+              * @returns {Array} Returns the function names.
+              */
 
-             for (i = 0; i < added.length; i++) {
-               // make a copy of prototype property, store as own property, and update..
-               parentWays[added[i]] = new Set(parentWays[added[i]]);
-               parentWays[added[i]].add(entity.id);
+
+             function baseFunctions(object, props) {
+               return arrayFilter(props, function (key) {
+                 return isFunction(object[key]);
+               });
              }
-           } else if (type === 'relation') {
-             // Update parentRels
-             // diff only on the IDs since the same entity can be a member multiple times with different roles
-             var oldentityMemberIDs = oldentity ? oldentity.members.map(function (m) {
-               return m.id;
-             }) : [];
-             var entityMemberIDs = entity ? entity.members.map(function (m) {
-               return m.id;
-             }) : [];
+             /**
+              * The base implementation of `_.get` without support for default values.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @param {Array|string} path The path of the property to get.
+              * @returns {*} Returns the resolved value.
+              */
 
-             if (oldentity && entity) {
-               removed = utilArrayDifference(oldentityMemberIDs, entityMemberIDs);
-               added = utilArrayDifference(entityMemberIDs, oldentityMemberIDs);
-             } else if (oldentity) {
-               removed = oldentityMemberIDs;
-               added = [];
-             } else if (entity) {
-               removed = [];
-               added = entityMemberIDs;
+
+             function baseGet(object, path) {
+               path = castPath(path, object);
+               var index = 0,
+                   length = path.length;
+
+               while (object != null && index < length) {
+                 object = object[toKey(path[index++])];
+               }
+
+               return index && index == length ? object : undefined$1;
              }
+             /**
+              * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
+              * `keysFunc` and `symbolsFunc` to get the enumerable property names and
+              * symbols of `object`.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @param {Function} keysFunc The function to get the keys of `object`.
+              * @param {Function} symbolsFunc The function to get the symbols of `object`.
+              * @returns {Array} Returns the array of property names and symbols.
+              */
 
-             for (i = 0; i < removed.length; i++) {
-               // make a copy of prototype property, store as own property, and update..
-               parentRels[removed[i]] = new Set(parentRels[removed[i]]);
-               parentRels[removed[i]]["delete"](oldentity.id);
+
+             function baseGetAllKeys(object, keysFunc, symbolsFunc) {
+               var result = keysFunc(object);
+               return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
              }
+             /**
+              * The base implementation of `getTag` without fallbacks for buggy environments.
+              *
+              * @private
+              * @param {*} value The value to query.
+              * @returns {string} Returns the `toStringTag`.
+              */
 
-             for (i = 0; i < added.length; i++) {
-               // make a copy of prototype property, store as own property, and update..
-               parentRels[added[i]] = new Set(parentRels[added[i]]);
-               parentRels[added[i]].add(entity.id);
+
+             function baseGetTag(value) {
+               if (value == null) {
+                 return value === undefined$1 ? undefinedTag : nullTag;
+               }
+
+               return symToStringTag && symToStringTag in Object(value) ? getRawTag(value) : objectToString(value);
              }
-           }
-         },
-         replace: function replace(entity) {
-           if (this.entities[entity.id] === entity) return this;
-           return this.update(function () {
-             this._updateCalculated(this.entities[entity.id], entity);
+             /**
+              * The base implementation of `_.gt` which doesn't coerce arguments.
+              *
+              * @private
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @returns {boolean} Returns `true` if `value` is greater than `other`,
+              *  else `false`.
+              */
 
-             this.entities[entity.id] = entity;
-           });
-         },
-         remove: function remove(entity) {
-           return this.update(function () {
-             this._updateCalculated(entity, undefined);
 
-             this.entities[entity.id] = undefined;
-           });
-         },
-         revert: function revert(id) {
-           var baseEntity = this.base().entities[id];
-           var headEntity = this.entities[id];
-           if (headEntity === baseEntity) return this;
-           return this.update(function () {
-             this._updateCalculated(headEntity, baseEntity);
+             function baseGt(value, other) {
+               return value > other;
+             }
+             /**
+              * The base implementation of `_.has` without support for deep paths.
+              *
+              * @private
+              * @param {Object} [object] The object to query.
+              * @param {Array|string} key The key to check.
+              * @returns {boolean} Returns `true` if `key` exists, else `false`.
+              */
 
-             delete this.entities[id];
-           });
-         },
-         update: function update() {
-           var graph = this.frozen ? coreGraph(this, true) : this;
 
-           for (var i = 0; i < arguments.length; i++) {
-             arguments[i].call(graph, graph);
-           }
+             function baseHas(object, key) {
+               return object != null && hasOwnProperty.call(object, key);
+             }
+             /**
+              * The base implementation of `_.hasIn` without support for deep paths.
+              *
+              * @private
+              * @param {Object} [object] The object to query.
+              * @param {Array|string} key The key to check.
+              * @returns {boolean} Returns `true` if `key` exists, else `false`.
+              */
 
-           if (this.frozen) graph.frozen = true;
-           return graph;
-         },
-         // Obliterates any existing entities
-         load: function load(entities) {
-           var base = this.base();
-           this.entities = Object.create(base.entities);
 
-           for (var i in entities) {
-             this.entities[i] = entities[i];
+             function baseHasIn(object, key) {
+               return object != null && key in Object(object);
+             }
+             /**
+              * The base implementation of `_.inRange` which doesn't coerce arguments.
+              *
+              * @private
+              * @param {number} number The number to check.
+              * @param {number} start The start of the range.
+              * @param {number} end The end of the range.
+              * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+              */
 
-             this._updateCalculated(base.entities[i], this.entities[i]);
-           }
 
-           return this;
-         }
-       };
+             function baseInRange(number, start, end) {
+               return number >= nativeMin(start, end) && number < nativeMax(start, end);
+             }
+             /**
+              * The base implementation of methods like `_.intersection`, without support
+              * for iteratee shorthands, that accepts an array of arrays to inspect.
+              *
+              * @private
+              * @param {Array} arrays The arrays to inspect.
+              * @param {Function} [iteratee] The iteratee invoked per element.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns the new array of shared values.
+              */
 
-       function osmTurn(turn) {
-         if (!(this instanceof osmTurn)) {
-           return new osmTurn(turn);
-         }
 
-         Object.assign(this, turn);
-       }
-       function osmIntersection(graph, startVertexId, maxDistance) {
-         maxDistance = maxDistance || 30; // in meters
+             function baseIntersection(arrays, iteratee, comparator) {
+               var includes = comparator ? arrayIncludesWith : arrayIncludes,
+                   length = arrays[0].length,
+                   othLength = arrays.length,
+                   othIndex = othLength,
+                   caches = Array(othLength),
+                   maxLength = Infinity,
+                   result = [];
 
-         var vgraph = coreGraph(); // virtual graph
+               while (othIndex--) {
+                 var array = arrays[othIndex];
 
-         var i, j, k;
+                 if (othIndex && iteratee) {
+                   array = arrayMap(array, baseUnary(iteratee));
+                 }
 
-         function memberOfRestriction(entity) {
-           return graph.parentRelations(entity).some(function (r) {
-             return r.isRestriction();
-           });
-         }
+                 maxLength = nativeMin(array.length, maxLength);
+                 caches[othIndex] = !comparator && (iteratee || length >= 120 && array.length >= 120) ? new SetCache(othIndex && array) : undefined$1;
+               }
 
-         function isRoad(way) {
-           if (way.isArea() || way.isDegenerate()) return false;
-           var roads = {
-             'motorway': true,
-             'motorway_link': true,
-             'trunk': true,
-             'trunk_link': true,
-             'primary': true,
-             'primary_link': true,
-             'secondary': true,
-             'secondary_link': true,
-             'tertiary': true,
-             'tertiary_link': true,
-             'residential': true,
-             'unclassified': true,
-             'living_street': true,
-             'service': true,
-             'road': true,
-             'track': true
-           };
-           return roads[way.tags.highway];
-         }
+               array = arrays[0];
+               var index = -1,
+                   seen = caches[0];
 
-         var startNode = graph.entity(startVertexId);
-         var checkVertices = [startNode];
-         var checkWays;
-         var vertices = [];
-         var vertexIds = [];
-         var vertex;
-         var ways = [];
-         var wayIds = [];
-         var way;
-         var nodes = [];
-         var node;
-         var parents = [];
-         var parent; // `actions` will store whatever actions must be performed to satisfy
-         // preconditions for adding a turn restriction to this intersection.
-         //  - Remove any existing degenerate turn restrictions (missing from/to, etc)
-         //  - Reverse oneways so that they are drawn in the forward direction
-         //  - Split ways on key vertices
+               outer: while (++index < length && result.length < maxLength) {
+                 var value = array[index],
+                     computed = iteratee ? iteratee(value) : value;
+                 value = comparator || value !== 0 ? value : 0;
 
-         var actions = []; // STEP 1:  walk the graph outwards from starting vertex to search
-         //  for more key vertices and ways to include in the intersection..
+                 if (!(seen ? cacheHas(seen, computed) : includes(result, computed, comparator))) {
+                   othIndex = othLength;
 
-         while (checkVertices.length) {
-           vertex = checkVertices.pop(); // check this vertex for parent ways that are roads
+                   while (--othIndex) {
+                     var cache = caches[othIndex];
 
-           checkWays = graph.parentWays(vertex);
-           var hasWays = false;
+                     if (!(cache ? cacheHas(cache, computed) : includes(arrays[othIndex], computed, comparator))) {
+                       continue outer;
+                     }
+                   }
 
-           for (i = 0; i < checkWays.length; i++) {
-             way = checkWays[i];
-             if (!isRoad(way) && !memberOfRestriction(way)) continue;
-             ways.push(way); // it's a road, or it's already in a turn restriction
+                   if (seen) {
+                     seen.push(computed);
+                   }
 
-             hasWays = true; // check the way's children for more key vertices
+                   result.push(value);
+                 }
+               }
 
-             nodes = utilArrayUniq(graph.childNodes(way));
+               return result;
+             }
+             /**
+              * The base implementation of `_.invert` and `_.invertBy` which inverts
+              * `object` with values transformed by `iteratee` and set by `setter`.
+              *
+              * @private
+              * @param {Object} object The object to iterate over.
+              * @param {Function} setter The function to set `accumulator` values.
+              * @param {Function} iteratee The iteratee to transform values.
+              * @param {Object} accumulator The initial inverted object.
+              * @returns {Function} Returns `accumulator`.
+              */
 
-             for (j = 0; j < nodes.length; j++) {
-               node = nodes[j];
-               if (node === vertex) continue; // same thing
 
-               if (vertices.indexOf(node) !== -1) continue; // seen it already
+             function baseInverter(object, setter, iteratee, accumulator) {
+               baseForOwn(object, function (value, key, object) {
+                 setter(accumulator, iteratee(value), key, object);
+               });
+               return accumulator;
+             }
+             /**
+              * The base implementation of `_.invoke` without support for individual
+              * method arguments.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @param {Array|string} path The path of the method to invoke.
+              * @param {Array} args The arguments to invoke the method with.
+              * @returns {*} Returns the result of the invoked method.
+              */
 
-               if (geoSphericalDistance(node.loc, startNode.loc) > maxDistance) continue; // too far from start
-               // a key vertex will have parents that are also roads
 
-               var hasParents = false;
-               parents = graph.parentWays(node);
+             function baseInvoke(object, path, args) {
+               path = castPath(path, object);
+               object = parent(object, path);
+               var func = object == null ? object : object[toKey(last(path))];
+               return func == null ? undefined$1 : apply(func, object, args);
+             }
+             /**
+              * The base implementation of `_.isArguments`.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+              */
 
-               for (k = 0; k < parents.length; k++) {
-                 parent = parents[k];
-                 if (parent === way) continue; // same thing
 
-                 if (ways.indexOf(parent) !== -1) continue; // seen it already
+             function baseIsArguments(value) {
+               return isObjectLike(value) && baseGetTag(value) == argsTag;
+             }
+             /**
+              * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+              */
 
-                 if (!isRoad(parent)) continue; // not a road
 
-                 hasParents = true;
-                 break;
-               }
+             function baseIsArrayBuffer(value) {
+               return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
+             }
+             /**
+              * The base implementation of `_.isDate` without Node.js optimizations.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+              */
 
-               if (hasParents) {
-                 checkVertices.push(node);
-               }
+
+             function baseIsDate(value) {
+               return isObjectLike(value) && baseGetTag(value) == dateTag;
              }
-           }
+             /**
+              * The base implementation of `_.isEqual` which supports partial comparisons
+              * and tracks traversed objects.
+              *
+              * @private
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @param {boolean} bitmask The bitmask flags.
+              *  1 - Unordered comparison
+              *  2 - Partial comparison
+              * @param {Function} [customizer] The function to customize comparisons.
+              * @param {Object} [stack] Tracks traversed `value` and `other` objects.
+              * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+              */
 
-           if (hasWays) {
-             vertices.push(vertex);
-           }
-         }
 
-         vertices = utilArrayUniq(vertices);
-         ways = utilArrayUniq(ways); // STEP 2:  Build a virtual graph containing only the entities in the intersection..
-         // Everything done after this step should act on the virtual graph
-         // Any actions that must be performed later to the main graph go in `actions` array
+             function baseIsEqual(value, other, bitmask, customizer, stack) {
+               if (value === other) {
+                 return true;
+               }
 
-         ways.forEach(function (way) {
-           graph.childNodes(way).forEach(function (node) {
-             vgraph = vgraph.replace(node);
-           });
-           vgraph = vgraph.replace(way);
-           graph.parentRelations(way).forEach(function (relation) {
-             if (relation.isRestriction()) {
-               if (relation.isValidRestriction(graph)) {
-                 vgraph = vgraph.replace(relation);
-               } else if (relation.isComplete(graph)) {
-                 actions.push(actionDeleteRelation(relation.id));
+               if (value == null || other == null || !isObjectLike(value) && !isObjectLike(other)) {
+                 return value !== value && other !== other;
                }
+
+               return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
              }
-           });
-         }); // STEP 3:  Force all oneways to be drawn in the forward direction
+             /**
+              * A specialized version of `baseIsEqual` for arrays and objects which performs
+              * deep comparisons and tracks traversed objects enabling objects with circular
+              * references to be compared.
+              *
+              * @private
+              * @param {Object} object The object to compare.
+              * @param {Object} other The other object to compare.
+              * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+              * @param {Function} customizer The function to customize comparisons.
+              * @param {Function} equalFunc The function to determine equivalents of values.
+              * @param {Object} [stack] Tracks traversed `object` and `other` objects.
+              * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+              */
 
-         ways.forEach(function (w) {
-           var way = vgraph.entity(w.id);
 
-           if (way.tags.oneway === '-1') {
-             var action = actionReverse(way.id, {
-               reverseOneway: true
-             });
-             actions.push(action);
-             vgraph = action(vgraph);
-           }
-         }); // STEP 4:  Split ways on key vertices
+             function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
+               var objIsArr = isArray(object),
+                   othIsArr = isArray(other),
+                   objTag = objIsArr ? arrayTag : getTag(object),
+                   othTag = othIsArr ? arrayTag : getTag(other);
+               objTag = objTag == argsTag ? objectTag : objTag;
+               othTag = othTag == argsTag ? objectTag : othTag;
+               var objIsObj = objTag == objectTag,
+                   othIsObj = othTag == objectTag,
+                   isSameTag = objTag == othTag;
 
-         var origCount = osmEntity.id.next.way;
-         vertices.forEach(function (v) {
-           // This is an odd way to do it, but we need to find all the ways that
-           // will be split here, then split them one at a time to ensure that these
-           // actions can be replayed on the main graph exactly in the same order.
-           // (It is unintuitive, but the order of ways returned from graph.parentWays()
-           // is arbitrary, depending on how the main graph and vgraph were built)
-           var splitAll = actionSplit([v.id]).keepHistoryOn('first');
+               if (isSameTag && isBuffer(object)) {
+                 if (!isBuffer(other)) {
+                   return false;
+                 }
 
-           if (!splitAll.disabled(vgraph)) {
-             splitAll.ways(vgraph).forEach(function (way) {
-               var splitOne = actionSplit([v.id]).limitWays([way.id]).keepHistoryOn('first');
-               actions.push(splitOne);
-               vgraph = splitOne(vgraph);
-             });
-           }
-         }); // In here is where we should also split the intersection at nearby junction.
-         //   for https://github.com/mapbox/iD-internal/issues/31
-         // nearbyVertices.forEach(function(v) {
-         // });
-         // Reasons why we reset the way id count here:
-         //  1. Continuity with way ids created by the splits so that we can replay
-         //     these actions later if the user decides to create a turn restriction
-         //  2. Avoids churning way ids just by hovering over a vertex
-         //     and displaying the turn restriction editor
+                 objIsArr = true;
+                 objIsObj = false;
+               }
 
-         osmEntity.id.next.way = origCount; // STEP 5:  Update arrays to point to vgraph entities
+               if (isSameTag && !objIsObj) {
+                 stack || (stack = new Stack());
+                 return objIsArr || isTypedArray(object) ? equalArrays(object, other, bitmask, customizer, equalFunc, stack) : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
+               }
 
-         vertexIds = vertices.map(function (v) {
-           return v.id;
-         });
-         vertices = [];
-         ways = [];
-         vertexIds.forEach(function (id) {
-           var vertex = vgraph.entity(id);
-           var parents = vgraph.parentWays(vertex);
-           vertices.push(vertex);
-           ways = ways.concat(parents);
-         });
-         vertices = utilArrayUniq(vertices);
-         ways = utilArrayUniq(ways);
-         vertexIds = vertices.map(function (v) {
-           return v.id;
-         });
-         wayIds = ways.map(function (w) {
-           return w.id;
-         }); // STEP 6:  Update the ways with some metadata that will be useful for
-         // walking the intersection graph later and rendering turn arrows.
+               if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
+                 var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
+                     othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
 
-         function withMetadata(way, vertexIds) {
-           var __oneWay = way.isOneWay(); // which affixes are key vertices?
+                 if (objIsWrapped || othIsWrapped) {
+                   var objUnwrapped = objIsWrapped ? object.value() : object,
+                       othUnwrapped = othIsWrapped ? other.value() : other;
+                   stack || (stack = new Stack());
+                   return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
+                 }
+               }
 
+               if (!isSameTag) {
+                 return false;
+               }
 
-           var __first = vertexIds.indexOf(way.first()) !== -1;
+               stack || (stack = new Stack());
+               return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
+             }
+             /**
+              * The base implementation of `_.isMap` without Node.js optimizations.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+              */
 
-           var __last = vertexIds.indexOf(way.last()) !== -1; // what roles is this way eligible for?
 
+             function baseIsMap(value) {
+               return isObjectLike(value) && getTag(value) == mapTag;
+             }
+             /**
+              * The base implementation of `_.isMatch` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Object} object The object to inspect.
+              * @param {Object} source The object of property values to match.
+              * @param {Array} matchData The property names, values, and compare flags to match.
+              * @param {Function} [customizer] The function to customize comparisons.
+              * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+              */
 
-           var __via = __first && __last;
 
-           var __from = __first && !__oneWay || __last;
+             function baseIsMatch(object, source, matchData, customizer) {
+               var index = matchData.length,
+                   length = index,
+                   noCustomizer = !customizer;
 
-           var __to = __first || __last && !__oneWay;
+               if (object == null) {
+                 return !length;
+               }
 
-           return way.update({
-             __first: __first,
-             __last: __last,
-             __from: __from,
-             __via: __via,
-             __to: __to,
-             __oneWay: __oneWay
-           });
-         }
+               object = Object(object);
 
-         ways = [];
-         wayIds.forEach(function (id) {
-           var way = withMetadata(vgraph.entity(id), vertexIds);
-           vgraph = vgraph.replace(way);
-           ways.push(way);
-         }); // STEP 7:  Simplify - This is an iterative process where we:
-         //  1. Find trivial vertices with only 2 parents
-         //  2. trim off the leaf way from those vertices and remove from vgraph
+               while (index--) {
+                 var data = matchData[index];
 
-         var keepGoing;
-         var removeWayIds = [];
-         var removeVertexIds = [];
+                 if (noCustomizer && data[2] ? data[1] !== object[data[0]] : !(data[0] in object)) {
+                   return false;
+                 }
+               }
 
-         do {
-           keepGoing = false;
-           checkVertices = vertexIds.slice();
+               while (++index < length) {
+                 data = matchData[index];
+                 var key = data[0],
+                     objValue = object[key],
+                     srcValue = data[1];
 
-           for (i = 0; i < checkVertices.length; i++) {
-             var vertexId = checkVertices[i];
-             vertex = vgraph.hasEntity(vertexId);
+                 if (noCustomizer && data[2]) {
+                   if (objValue === undefined$1 && !(key in object)) {
+                     return false;
+                   }
+                 } else {
+                   var stack = new Stack();
 
-             if (!vertex) {
-               if (vertexIds.indexOf(vertexId) !== -1) {
-                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+                   if (customizer) {
+                     var result = customizer(objValue, srcValue, key, object, source, stack);
+                   }
+
+                   if (!(result === undefined$1 ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack) : result)) {
+                     return false;
+                   }
+                 }
                }
 
-               removeVertexIds.push(vertexId);
-               continue;
+               return true;
              }
+             /**
+              * The base implementation of `_.isNative` without bad shim checks.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a native function,
+              *  else `false`.
+              */
 
-             parents = vgraph.parentWays(vertex);
 
-             if (parents.length < 3) {
-               if (vertexIds.indexOf(vertexId) !== -1) {
-                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+             function baseIsNative(value) {
+               if (!isObject(value) || isMasked(value)) {
+                 return false;
                }
+
+               var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
+               return pattern.test(toSource(value));
              }
+             /**
+              * The base implementation of `_.isRegExp` without Node.js optimizations.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+              */
 
-             if (parents.length === 2) {
-               // vertex with 2 parents is trivial
-               var a = parents[0];
-               var b = parents[1];
-               var aIsLeaf = a && !a.__via;
-               var bIsLeaf = b && !b.__via;
-               var leaf, survivor;
 
-               if (aIsLeaf && !bIsLeaf) {
-                 leaf = a;
-                 survivor = b;
-               } else if (!aIsLeaf && bIsLeaf) {
-                 leaf = b;
-                 survivor = a;
-               }
+             function baseIsRegExp(value) {
+               return isObjectLike(value) && baseGetTag(value) == regexpTag;
+             }
+             /**
+              * The base implementation of `_.isSet` without Node.js optimizations.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+              */
 
-               if (leaf && survivor) {
-                 survivor = withMetadata(survivor, vertexIds); // update survivor way
 
-                 vgraph = vgraph.replace(survivor).remove(leaf); // update graph
+             function baseIsSet(value) {
+               return isObjectLike(value) && getTag(value) == setTag;
+             }
+             /**
+              * The base implementation of `_.isTypedArray` without Node.js optimizations.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+              */
 
-                 removeWayIds.push(leaf.id);
-                 keepGoing = true;
-               }
+
+             function baseIsTypedArray(value) {
+               return isObjectLike(value) && isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
              }
+             /**
+              * The base implementation of `_.iteratee`.
+              *
+              * @private
+              * @param {*} [value=_.identity] The value to convert to an iteratee.
+              * @returns {Function} Returns the iteratee.
+              */
 
-             parents = vgraph.parentWays(vertex);
 
-             if (parents.length < 2) {
-               // vertex is no longer a key vertex
-               if (vertexIds.indexOf(vertexId) !== -1) {
-                 vertexIds.splice(vertexIds.indexOf(vertexId), 1); // stop checking this one
+             function baseIteratee(value) {
+               // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
+               // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
+               if (typeof value == 'function') {
+                 return value;
                }
 
-               removeVertexIds.push(vertexId);
-               keepGoing = true;
-             }
+               if (value == null) {
+                 return identity;
+               }
 
-             if (parents.length < 1) {
-               // vertex is no longer attached to anything
-               vgraph = vgraph.remove(vertex);
+               if (_typeof(value) == 'object') {
+                 return isArray(value) ? baseMatchesProperty(value[0], value[1]) : baseMatches(value);
+               }
+
+               return property(value);
              }
-           }
-         } while (keepGoing);
+             /**
+              * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of property names.
+              */
 
-         vertices = vertices.filter(function (vertex) {
-           return removeVertexIds.indexOf(vertex.id) === -1;
-         }).map(function (vertex) {
-           return vgraph.entity(vertex.id);
-         });
-         ways = ways.filter(function (way) {
-           return removeWayIds.indexOf(way.id) === -1;
-         }).map(function (way) {
-           return vgraph.entity(way.id);
-         }); // OK!  Here is our intersection..
 
-         var intersection = {
-           graph: vgraph,
-           actions: actions,
-           vertices: vertices,
-           ways: ways
-         }; // Get all the valid turns through this intersection given a starting way id.
-         // This operates on the virtual graph for everything.
-         //
-         // Basically, walk through all possible paths from starting way,
-         //   honoring the existing turn restrictions as we go (watch out for loops!)
-         //
-         // For each path found, generate and return a `osmTurn` datastructure.
-         //
+             function baseKeys(object) {
+               if (!isPrototype(object)) {
+                 return nativeKeys(object);
+               }
 
-         intersection.turns = function (fromWayId, maxViaWay) {
-           if (!fromWayId) return [];
-           if (!maxViaWay) maxViaWay = 0;
-           var vgraph = intersection.graph;
-           var keyVertexIds = intersection.vertices.map(function (v) {
-             return v.id;
-           });
-           var start = vgraph.entity(fromWayId);
-           if (!start || !(start.__from || start.__via)) return []; // maxViaWay=0   from-*-to              (0 vias)
-           // maxViaWay=1   from-*-via-*-to        (1 via max)
-           // maxViaWay=2   from-*-via-*-via-*-to  (2 vias max)
+               var result = [];
 
-           var maxPathLength = maxViaWay * 2 + 3;
-           var turns = [];
-           step(start);
-           return turns; // traverse the intersection graph and find all the valid paths
+               for (var key in Object(object)) {
+                 if (hasOwnProperty.call(object, key) && key != 'constructor') {
+                   result.push(key);
+                 }
+               }
 
-           function step(entity, currPath, currRestrictions, matchedRestriction) {
-             currPath = (currPath || []).slice(); // shallow copy
+               return result;
+             }
+             /**
+              * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of property names.
+              */
 
-             if (currPath.length >= maxPathLength) return;
-             currPath.push(entity.id);
-             currRestrictions = (currRestrictions || []).slice(); // shallow copy
 
-             var i, j;
+             function baseKeysIn(object) {
+               if (!isObject(object)) {
+                 return nativeKeysIn(object);
+               }
 
-             if (entity.type === 'node') {
-               var parents = vgraph.parentWays(entity);
-               var nextWays = []; // which ways can we step into?
+               var isProto = isPrototype(object),
+                   result = [];
 
-               for (i = 0; i < parents.length; i++) {
-                 var way = parents[i]; // if next way is a oneway incoming to this vertex, skip
+               for (var key in object) {
+                 if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
+                   result.push(key);
+                 }
+               }
 
-                 if (way.__oneWay && way.nodes[0] !== entity.id) continue; // if we have seen it before (allowing for an initial u-turn), skip
+               return result;
+             }
+             /**
+              * The base implementation of `_.lt` which doesn't coerce arguments.
+              *
+              * @private
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @returns {boolean} Returns `true` if `value` is less than `other`,
+              *  else `false`.
+              */
 
-                 if (currPath.indexOf(way.id) !== -1 && currPath.length >= 3) continue; // Check all "current" restrictions (where we've already walked the `FROM`)
 
-                 var restrict = null;
+             function baseLt(value, other) {
+               return value < other;
+             }
+             /**
+              * The base implementation of `_.map` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} iteratee The function invoked per iteration.
+              * @returns {Array} Returns the new mapped array.
+              */
 
-                 for (j = 0; j < currRestrictions.length; j++) {
-                   var restriction = currRestrictions[j];
-                   var f = restriction.memberByRole('from');
-                   var v = restriction.membersByRole('via');
-                   var t = restriction.memberByRole('to');
-                   var isOnly = /^only_/.test(restriction.tags.restriction); // Does the current path match this turn restriction?
 
-                   var matchesFrom = f.id === fromWayId;
-                   var matchesViaTo = false;
-                   var isAlongOnlyPath = false;
+             function baseMap(collection, iteratee) {
+               var index = -1,
+                   result = isArrayLike(collection) ? Array(collection.length) : [];
+               baseEach(collection, function (value, key, collection) {
+                 result[++index] = iteratee(value, key, collection);
+               });
+               return result;
+             }
+             /**
+              * The base implementation of `_.matches` which doesn't clone `source`.
+              *
+              * @private
+              * @param {Object} source The object of property values to match.
+              * @returns {Function} Returns the new spec function.
+              */
 
-                   if (t.id === way.id) {
-                     // match TO
-                     if (v.length === 1 && v[0].type === 'node') {
-                       // match VIA node
-                       matchesViaTo = v[0].id === entity.id && (matchesFrom && currPath.length === 2 || !matchesFrom && currPath.length > 2);
-                     } else {
-                       // match all VIA ways
-                       var pathVias = [];
 
-                       for (k = 2; k < currPath.length; k += 2) {
-                         // k = 2 skips FROM
-                         pathVias.push(currPath[k]); // (path goes way-node-way...)
-                       }
+             function baseMatches(source) {
+               var matchData = getMatchData(source);
 
-                       var restrictionVias = [];
+               if (matchData.length == 1 && matchData[0][2]) {
+                 return matchesStrictComparable(matchData[0][0], matchData[0][1]);
+               }
 
-                       for (k = 0; k < v.length; k++) {
-                         if (v[k].type === 'way') {
-                           restrictionVias.push(v[k].id);
-                         }
-                       }
+               return function (object) {
+                 return object === source || baseIsMatch(object, source, matchData);
+               };
+             }
+             /**
+              * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
+              *
+              * @private
+              * @param {string} path The path of the property to get.
+              * @param {*} srcValue The value to match.
+              * @returns {Function} Returns the new spec function.
+              */
 
-                       var diff = utilArrayDifference(pathVias, restrictionVias);
-                       matchesViaTo = !diff.length;
-                     }
-                   } else if (isOnly) {
-                     for (k = 0; k < v.length; k++) {
-                       // way doesn't match TO, but is one of the via ways along the path of an "only"
-                       if (v[k].type === 'way' && v[k].id === way.id) {
-                         isAlongOnlyPath = true;
-                         break;
-                       }
-                     }
-                   }
 
-                   if (matchesViaTo) {
-                     if (isOnly) {
-                       restrict = {
-                         id: restriction.id,
-                         direct: matchesFrom,
-                         from: f.id,
-                         only: true,
-                         end: true
-                       };
-                     } else {
-                       restrict = {
-                         id: restriction.id,
-                         direct: matchesFrom,
-                         from: f.id,
-                         no: true,
-                         end: true
-                       };
-                     }
-                   } else {
-                     // indirect - caused by a different nearby restriction
-                     if (isAlongOnlyPath) {
-                       restrict = {
-                         id: restriction.id,
-                         direct: false,
-                         from: f.id,
-                         only: true,
-                         end: false
-                       };
-                     } else if (isOnly) {
-                       restrict = {
-                         id: restriction.id,
-                         direct: false,
-                         from: f.id,
-                         no: true,
-                         end: true
-                       };
-                     }
-                   } // stop looking if we find a "direct" restriction (matching FROM, VIA, TO)
+             function baseMatchesProperty(path, srcValue) {
+               if (isKey(path) && isStrictComparable(srcValue)) {
+                 return matchesStrictComparable(toKey(path), srcValue);
+               }
 
+               return function (object) {
+                 var objValue = get(object, path);
+                 return objValue === undefined$1 && objValue === srcValue ? hasIn(object, path) : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
+               };
+             }
+             /**
+              * The base implementation of `_.merge` without support for multiple sources.
+              *
+              * @private
+              * @param {Object} object The destination object.
+              * @param {Object} source The source object.
+              * @param {number} srcIndex The index of `source`.
+              * @param {Function} [customizer] The function to customize merged values.
+              * @param {Object} [stack] Tracks traversed source values and their merged
+              *  counterparts.
+              */
 
-                   if (restrict && restrict.direct) break;
-                 }
 
-                 nextWays.push({
-                   way: way,
-                   restrict: restrict
-                 });
+             function baseMerge(object, source, srcIndex, customizer, stack) {
+               if (object === source) {
+                 return;
                }
 
-               nextWays.forEach(function (nextWay) {
-                 step(nextWay.way, currPath, currRestrictions, nextWay.restrict);
-               });
-             } else {
-               // entity.type === 'way'
-               if (currPath.length >= 3) {
-                 // this is a "complete" path..
-                 var turnPath = currPath.slice(); // shallow copy
-                 // an indirect restriction - only include the partial path (starting at FROM)
+               baseFor(source, function (srcValue, key) {
+                 stack || (stack = new Stack());
 
-                 if (matchedRestriction && matchedRestriction.direct === false) {
-                   for (i = 0; i < turnPath.length; i++) {
-                     if (turnPath[i] === matchedRestriction.from) {
-                       turnPath = turnPath.slice(i);
-                       break;
-                     }
+                 if (isObject(srcValue)) {
+                   baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
+                 } else {
+                   var newValue = customizer ? customizer(safeGet(object, key), srcValue, key + '', object, source, stack) : undefined$1;
+
+                   if (newValue === undefined$1) {
+                     newValue = srcValue;
                    }
+
+                   assignMergeValue(object, key, newValue);
                  }
+               }, keysIn);
+             }
+             /**
+              * A specialized version of `baseMerge` for arrays and objects which performs
+              * deep merges and tracks traversed objects enabling objects with circular
+              * references to be merged.
+              *
+              * @private
+              * @param {Object} object The destination object.
+              * @param {Object} source The source object.
+              * @param {string} key The key of the value to merge.
+              * @param {number} srcIndex The index of `source`.
+              * @param {Function} mergeFunc The function to merge values.
+              * @param {Function} [customizer] The function to customize assigned values.
+              * @param {Object} [stack] Tracks traversed source values and their merged
+              *  counterparts.
+              */
 
-                 var turn = pathToTurn(turnPath);
 
-                 if (turn) {
-                   if (matchedRestriction) {
-                     turn.restrictionID = matchedRestriction.id;
-                     turn.no = matchedRestriction.no;
-                     turn.only = matchedRestriction.only;
-                     turn.direct = matchedRestriction.direct;
+             function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
+               var objValue = safeGet(object, key),
+                   srcValue = safeGet(source, key),
+                   stacked = stack.get(srcValue);
+
+               if (stacked) {
+                 assignMergeValue(object, key, stacked);
+                 return;
+               }
+
+               var newValue = customizer ? customizer(objValue, srcValue, key + '', object, source, stack) : undefined$1;
+               var isCommon = newValue === undefined$1;
+
+               if (isCommon) {
+                 var isArr = isArray(srcValue),
+                     isBuff = !isArr && isBuffer(srcValue),
+                     isTyped = !isArr && !isBuff && isTypedArray(srcValue);
+                 newValue = srcValue;
+
+                 if (isArr || isBuff || isTyped) {
+                   if (isArray(objValue)) {
+                     newValue = objValue;
+                   } else if (isArrayLikeObject(objValue)) {
+                     newValue = copyArray(objValue);
+                   } else if (isBuff) {
+                     isCommon = false;
+                     newValue = cloneBuffer(srcValue, true);
+                   } else if (isTyped) {
+                     isCommon = false;
+                     newValue = cloneTypedArray(srcValue, true);
+                   } else {
+                     newValue = [];
                    }
+                 } else if (isPlainObject(srcValue) || isArguments(srcValue)) {
+                   newValue = objValue;
 
-                   turns.push(osmTurn(turn));
+                   if (isArguments(objValue)) {
+                     newValue = toPlainObject(objValue);
+                   } else if (!isObject(objValue) || isFunction(objValue)) {
+                     newValue = initCloneObject(srcValue);
+                   }
+                 } else {
+                   isCommon = false;
                  }
+               }
 
-                 if (currPath[0] === currPath[2]) return; // if we made a u-turn - stop here
+               if (isCommon) {
+                 // Recursively merge objects and arrays (susceptible to call stack limits).
+                 stack.set(srcValue, newValue);
+                 mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
+                 stack['delete'](srcValue);
                }
 
-               if (matchedRestriction && matchedRestriction.end) return; // don't advance any further
-               // which nodes can we step into?
+               assignMergeValue(object, key, newValue);
+             }
+             /**
+              * The base implementation of `_.nth` which doesn't coerce arguments.
+              *
+              * @private
+              * @param {Array} array The array to query.
+              * @param {number} n The index of the element to return.
+              * @returns {*} Returns the nth element of `array`.
+              */
 
-               var n1 = vgraph.entity(entity.first());
-               var n2 = vgraph.entity(entity.last());
-               var dist = geoSphericalDistance(n1.loc, n2.loc);
-               var nextNodes = [];
 
-               if (currPath.length > 1) {
-                 if (dist > maxDistance) return; // the next node is too far
+             function baseNth(array, n) {
+               var length = array.length;
 
-                 if (!entity.__via) return; // this way is a leaf / can't be a via
+               if (!length) {
+                 return;
                }
 
-               if (!entity.__oneWay && // bidirectional..
-               keyVertexIds.indexOf(n1.id) !== -1 && // key vertex..
-               currPath.indexOf(n1.id) === -1) {
-                 // haven't seen it yet..
-                 nextNodes.push(n1); // can advance to first node
-               }
+               n += n < 0 ? length : 0;
+               return isIndex(n, length) ? array[n] : undefined$1;
+             }
+             /**
+              * The base implementation of `_.orderBy` without param guards.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
+              * @param {string[]} orders The sort orders of `iteratees`.
+              * @returns {Array} Returns the new sorted array.
+              */
 
-               if (keyVertexIds.indexOf(n2.id) !== -1 && // key vertex..
-               currPath.indexOf(n2.id) === -1) {
-                 // haven't seen it yet..
-                 nextNodes.push(n2); // can advance to last node
-               }
 
-               nextNodes.forEach(function (nextNode) {
-                 // gather restrictions FROM this way
-                 var fromRestrictions = vgraph.parentRelations(entity).filter(function (r) {
-                   if (!r.isRestriction()) return false;
-                   var f = r.memberByRole('from');
-                   if (!f || f.id !== entity.id) return false;
-                   var isOnly = /^only_/.test(r.tags.restriction);
-                   if (!isOnly) return true; // `only_` restrictions only matter along the direction of the VIA - #4849
+             function baseOrderBy(collection, iteratees, orders) {
+               if (iteratees.length) {
+                 iteratees = arrayMap(iteratees, function (iteratee) {
+                   if (isArray(iteratee)) {
+                     return function (value) {
+                       return baseGet(value, iteratee.length === 1 ? iteratee[0] : iteratee);
+                     };
+                   }
 
-                   var isOnlyVia = false;
-                   var v = r.membersByRole('via');
+                   return iteratee;
+                 });
+               } else {
+                 iteratees = [identity];
+               }
 
-                   if (v.length === 1 && v[0].type === 'node') {
-                     // via node
-                     isOnlyVia = v[0].id === nextNode.id;
-                   } else {
-                     // via way(s)
-                     for (var i = 0; i < v.length; i++) {
-                       if (v[i].type !== 'way') continue;
-                       var viaWay = vgraph.entity(v[i].id);
+               var index = -1;
+               iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
+               var result = baseMap(collection, function (value, key, collection) {
+                 var criteria = arrayMap(iteratees, function (iteratee) {
+                   return iteratee(value);
+                 });
+                 return {
+                   'criteria': criteria,
+                   'index': ++index,
+                   'value': value
+                 };
+               });
+               return baseSortBy(result, function (object, other) {
+                 return compareMultiple(object, other, orders);
+               });
+             }
+             /**
+              * The base implementation of `_.pick` without support for individual
+              * property identifiers.
+              *
+              * @private
+              * @param {Object} object The source object.
+              * @param {string[]} paths The property paths to pick.
+              * @returns {Object} Returns the new object.
+              */
 
-                       if (viaWay.first() === nextNode.id || viaWay.last() === nextNode.id) {
-                         isOnlyVia = true;
-                         break;
-                       }
-                     }
-                   }
 
-                   return isOnlyVia;
-                 });
-                 step(nextNode, currPath, currRestrictions.concat(fromRestrictions), false);
+             function basePick(object, paths) {
+               return basePickBy(object, paths, function (value, path) {
+                 return hasIn(object, path);
                });
              }
-           } // assumes path is alternating way-node-way of odd length
+             /**
+              * The base implementation of  `_.pickBy` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Object} object The source object.
+              * @param {string[]} paths The property paths to pick.
+              * @param {Function} predicate The function invoked per property.
+              * @returns {Object} Returns the new object.
+              */
 
 
-           function pathToTurn(path) {
-             if (path.length < 3) return;
-             var fromWayId, fromNodeId, fromVertexId;
-             var toWayId, toNodeId, toVertexId;
-             var viaWayIds, viaNodeId, isUturn;
-             fromWayId = path[0];
-             toWayId = path[path.length - 1];
+             function basePickBy(object, paths, predicate) {
+               var index = -1,
+                   length = paths.length,
+                   result = {};
 
-             if (path.length === 3 && fromWayId === toWayId) {
-               // u turn
-               var way = vgraph.entity(fromWayId);
-               if (way.__oneWay) return null;
-               isUturn = true;
-               viaNodeId = fromVertexId = toVertexId = path[1];
-               fromNodeId = toNodeId = adjacentNode(fromWayId, viaNodeId);
-             } else {
-               isUturn = false;
-               fromVertexId = path[1];
-               fromNodeId = adjacentNode(fromWayId, fromVertexId);
-               toVertexId = path[path.length - 2];
-               toNodeId = adjacentNode(toWayId, toVertexId);
+               while (++index < length) {
+                 var path = paths[index],
+                     value = baseGet(object, path);
 
-               if (path.length === 3) {
-                 viaNodeId = path[1];
-               } else {
-                 viaWayIds = path.filter(function (entityId) {
-                   return entityId[0] === 'w';
-                 });
-                 viaWayIds = viaWayIds.slice(1, viaWayIds.length - 1); // remove first, last
+                 if (predicate(value, path)) {
+                   baseSet(result, castPath(path, object), value);
+                 }
                }
+
+               return result;
              }
+             /**
+              * A specialized version of `baseProperty` which supports deep paths.
+              *
+              * @private
+              * @param {Array|string} path The path of the property to get.
+              * @returns {Function} Returns the new accessor function.
+              */
 
-             return {
-               key: path.join('_'),
-               path: path,
-               from: {
-                 node: fromNodeId,
-                 way: fromWayId,
-                 vertex: fromVertexId
-               },
-               via: {
-                 node: viaNodeId,
-                 ways: viaWayIds
-               },
-               to: {
-                 node: toNodeId,
-                 way: toWayId,
-                 vertex: toVertexId
-               },
-               u: isUturn
-             };
 
-             function adjacentNode(wayId, affixId) {
-               var nodes = vgraph.entity(wayId).nodes;
-               return affixId === nodes[0] ? nodes[1] : nodes[nodes.length - 2];
+             function basePropertyDeep(path) {
+               return function (object) {
+                 return baseGet(object, path);
+               };
              }
-           }
-         };
-
-         return intersection;
-       }
-       function osmInferRestriction(graph, turn, projection) {
-         var fromWay = graph.entity(turn.from.way);
-         var fromNode = graph.entity(turn.from.node);
-         var fromVertex = graph.entity(turn.from.vertex);
-         var toWay = graph.entity(turn.to.way);
-         var toNode = graph.entity(turn.to.node);
-         var toVertex = graph.entity(turn.to.vertex);
-         var fromOneWay = fromWay.tags.oneway === 'yes';
-         var toOneWay = toWay.tags.oneway === 'yes';
-         var angle = (geoAngle(fromVertex, fromNode, projection) - geoAngle(toVertex, toNode, projection)) * 180 / Math.PI;
+             /**
+              * The base implementation of `_.pullAllBy` without support for iteratee
+              * shorthands.
+              *
+              * @private
+              * @param {Array} array The array to modify.
+              * @param {Array} values The values to remove.
+              * @param {Function} [iteratee] The iteratee invoked per element.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns `array`.
+              */
 
-         while (angle < 0) {
-           angle += 360;
-         }
 
-         if (fromNode === toNode) return 'no_u_turn';
-         if ((angle < 23 || angle > 336) && fromOneWay && toOneWay) return 'no_u_turn'; // wider tolerance for u-turn if both ways are oneway
+             function basePullAll(array, values, iteratee, comparator) {
+               var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
+                   index = -1,
+                   length = values.length,
+                   seen = array;
 
-         if ((angle < 40 || angle > 319) && fromOneWay && toOneWay && turn.from.vertex !== turn.to.vertex) return 'no_u_turn'; // even wider tolerance for u-turn if there is a via way (from !== to)
+               if (array === values) {
+                 values = copyArray(values);
+               }
 
-         if (angle < 158) return 'no_right_turn';
-         if (angle > 202) return 'no_left_turn';
-         return 'no_straight_on';
-       }
+               if (iteratee) {
+                 seen = arrayMap(array, baseUnary(iteratee));
+               }
 
-       function actionMergePolygon(ids, newRelationId) {
-         function groupEntities(graph) {
-           var entities = ids.map(function (id) {
-             return graph.entity(id);
-           });
-           var geometryGroups = utilArrayGroupBy(entities, function (entity) {
-             if (entity.type === 'way' && entity.isClosed()) {
-               return 'closedWay';
-             } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-               return 'multipolygon';
-             } else {
-               return 'other';
-             }
-           });
-           return Object.assign({
-             closedWay: [],
-             multipolygon: [],
-             other: []
-           }, geometryGroups);
-         }
+               while (++index < length) {
+                 var fromIndex = 0,
+                     value = values[index],
+                     computed = iteratee ? iteratee(value) : value;
 
-         var action = function action(graph) {
-           var entities = groupEntities(graph); // An array representing all the polygons that are part of the multipolygon.
-           //
-           // Each element is itself an array of objects with an id property, and has a
-           // locs property which is an array of the locations forming the polygon.
+                 while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
+                   if (seen !== array) {
+                     splice.call(seen, fromIndex, 1);
+                   }
 
-           var polygons = entities.multipolygon.reduce(function (polygons, m) {
-             return polygons.concat(osmJoinWays(m.members, graph));
-           }, []).concat(entities.closedWay.map(function (d) {
-             var member = [{
-               id: d.id
-             }];
-             member.nodes = graph.childNodes(d);
-             return member;
-           })); // contained is an array of arrays of boolean values,
-           // where contained[j][k] is true iff the jth way is
-           // contained by the kth way.
+                   splice.call(array, fromIndex, 1);
+                 }
+               }
 
-           var contained = polygons.map(function (w, i) {
-             return polygons.map(function (d, n) {
-               if (i === n) return null;
-               return geoPolygonContainsPolygon(d.nodes.map(function (n) {
-                 return n.loc;
-               }), w.nodes.map(function (n) {
-                 return n.loc;
-               }));
-             });
-           }); // Sort all polygons as either outer or inner ways
+               return array;
+             }
+             /**
+              * The base implementation of `_.pullAt` without support for individual
+              * indexes or capturing the removed elements.
+              *
+              * @private
+              * @param {Array} array The array to modify.
+              * @param {number[]} indexes The indexes of elements to remove.
+              * @returns {Array} Returns `array`.
+              */
 
-           var members = [];
-           var outer = true;
 
-           while (polygons.length) {
-             extractUncontained(polygons);
-             polygons = polygons.filter(isContained);
-             contained = contained.filter(isContained).map(filterContained);
-           }
+             function basePullAt(array, indexes) {
+               var length = array ? indexes.length : 0,
+                   lastIndex = length - 1;
 
-           function isContained(d, i) {
-             return contained[i].some(function (val) {
-               return val;
-             });
-           }
+               while (length--) {
+                 var index = indexes[length];
 
-           function filterContained(d) {
-             return d.filter(isContained);
-           }
+                 if (length == lastIndex || index !== previous) {
+                   var previous = index;
 
-           function extractUncontained(polygons) {
-             polygons.forEach(function (d, i) {
-               if (!isContained(d, i)) {
-                 d.forEach(function (member) {
-                   members.push({
-                     type: 'way',
-                     id: member.id,
-                     role: outer ? 'outer' : 'inner'
-                   });
-                 });
+                   if (isIndex(index)) {
+                     splice.call(array, index, 1);
+                   } else {
+                     baseUnset(array, index);
+                   }
+                 }
                }
-             });
-             outer = !outer;
-           } // Move all tags to one relation
 
-
-           var relation = entities.multipolygon[0] || osmRelation({
-             id: newRelationId,
-             tags: {
-               type: 'multipolygon'
-             }
-           });
-           entities.multipolygon.slice(1).forEach(function (m) {
-             relation = relation.mergeTags(m.tags);
-             graph = graph.remove(m);
-           });
-           entities.closedWay.forEach(function (way) {
-             function isThisOuter(m) {
-               return m.id === way.id && m.role !== 'inner';
+               return array;
              }
+             /**
+              * The base implementation of `_.random` without support for returning
+              * floating-point numbers.
+              *
+              * @private
+              * @param {number} lower The lower bound.
+              * @param {number} upper The upper bound.
+              * @returns {number} Returns the random number.
+              */
 
-             if (members.some(isThisOuter)) {
-               relation = relation.mergeTags(way.tags);
-               graph = graph.replace(way.update({
-                 tags: {}
-               }));
-             }
-           });
-           return graph.replace(relation.update({
-             members: members,
-             tags: utilObjectOmit(relation.tags, ['area'])
-           }));
-         };
 
-         action.disabled = function (graph) {
-           var entities = groupEntities(graph);
+             function baseRandom(lower, upper) {
+               return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
+             }
+             /**
+              * The base implementation of `_.range` and `_.rangeRight` which doesn't
+              * coerce arguments.
+              *
+              * @private
+              * @param {number} start The start of the range.
+              * @param {number} end The end of the range.
+              * @param {number} step The value to increment or decrement by.
+              * @param {boolean} [fromRight] Specify iterating from right to left.
+              * @returns {Array} Returns the range of numbers.
+              */
 
-           if (entities.other.length > 0 || entities.closedWay.length + entities.multipolygon.length < 2) {
-             return 'not_eligible';
-           }
 
-           if (!entities.multipolygon.every(function (r) {
-             return r.isComplete(graph);
-           })) {
-             return 'incomplete_relation';
-           }
+             function baseRange(start, end, step, fromRight) {
+               var index = -1,
+                   length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
+                   result = Array(length);
 
-           if (!entities.multipolygon.length) {
-             var sharedMultipolygons = [];
-             entities.closedWay.forEach(function (way, i) {
-               if (i === 0) {
-                 sharedMultipolygons = graph.parentMultipolygons(way);
-               } else {
-                 sharedMultipolygons = utilArrayIntersection(sharedMultipolygons, graph.parentMultipolygons(way));
+               while (length--) {
+                 result[fromRight ? length : ++index] = start;
+                 start += step;
                }
-             });
-             sharedMultipolygons = sharedMultipolygons.filter(function (relation) {
-               return relation.members.length === entities.closedWay.length;
-             });
 
-             if (sharedMultipolygons.length) {
-               // don't create a new multipolygon if it'd be redundant
-               return 'not_eligible';
+               return result;
              }
-           } else if (entities.closedWay.some(function (way) {
-             return utilArrayIntersection(graph.parentMultipolygons(way), entities.multipolygon).length;
-           })) {
-             // don't add a way to a multipolygon again if it's already a member
-             return 'not_eligible';
-           }
-         };
+             /**
+              * The base implementation of `_.repeat` which doesn't coerce arguments.
+              *
+              * @private
+              * @param {string} string The string to repeat.
+              * @param {number} n The number of times to repeat the string.
+              * @returns {string} Returns the repeated string.
+              */
 
-         return action;
-       }
 
-       var UNSUPPORTED_Y$3 = regexpStickyHelpers.UNSUPPORTED_Y;
+             function baseRepeat(string, n) {
+               var result = '';
 
-       // `RegExp.prototype.flags` getter
-       // https://tc39.github.io/ecma262/#sec-get-regexp.prototype.flags
-       if (descriptors && (/./g.flags != 'g' || UNSUPPORTED_Y$3)) {
-         objectDefineProperty.f(RegExp.prototype, 'flags', {
-           configurable: true,
-           get: regexpFlags
-         });
-       }
+               if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
+                 return result;
+               } // Leverage the exponentiation by squaring algorithm for a faster repeat.
+               // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
 
-       var fastDeepEqual = function equal(a, b) {
-         if (a === b) return true;
 
-         if (a && b && _typeof(a) == 'object' && _typeof(b) == 'object') {
-           if (a.constructor !== b.constructor) return false;
-           var length, i, keys;
+               do {
+                 if (n % 2) {
+                   result += string;
+                 }
 
-           if (Array.isArray(a)) {
-             length = a.length;
-             if (length != b.length) return false;
+                 n = nativeFloor(n / 2);
 
-             for (i = length; i-- !== 0;) {
-               if (!equal(a[i], b[i])) return false;
+                 if (n) {
+                   string += string;
+                 }
+               } while (n);
+
+               return result;
+             }
+             /**
+              * The base implementation of `_.rest` which doesn't validate or coerce arguments.
+              *
+              * @private
+              * @param {Function} func The function to apply a rest parameter to.
+              * @param {number} [start=func.length-1] The start position of the rest parameter.
+              * @returns {Function} Returns the new function.
+              */
+
+
+             function baseRest(func, start) {
+               return setToString(overRest(func, start, identity), func + '');
              }
+             /**
+              * The base implementation of `_.sample`.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to sample.
+              * @returns {*} Returns the random element.
+              */
+
+
+             function baseSample(collection) {
+               return arraySample(values(collection));
+             }
+             /**
+              * The base implementation of `_.sampleSize` without param guards.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to sample.
+              * @param {number} n The number of elements to sample.
+              * @returns {Array} Returns the random elements.
+              */
+
+
+             function baseSampleSize(collection, n) {
+               var array = values(collection);
+               return shuffleSelf(array, baseClamp(n, 0, array.length));
+             }
+             /**
+              * The base implementation of `_.set`.
+              *
+              * @private
+              * @param {Object} object The object to modify.
+              * @param {Array|string} path The path of the property to set.
+              * @param {*} value The value to set.
+              * @param {Function} [customizer] The function to customize path creation.
+              * @returns {Object} Returns `object`.
+              */
+
 
-             return true;
-           }
+             function baseSet(object, path, value, customizer) {
+               if (!isObject(object)) {
+                 return object;
+               }
 
-           if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
-           if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
-           if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();
-           keys = Object.keys(a);
-           length = keys.length;
-           if (length !== Object.keys(b).length) return false;
+               path = castPath(path, object);
+               var index = -1,
+                   length = path.length,
+                   lastIndex = length - 1,
+                   nested = object;
 
-           for (i = length; i-- !== 0;) {
-             if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;
-           }
+               while (nested != null && ++index < length) {
+                 var key = toKey(path[index]),
+                     newValue = value;
 
-           for (i = length; i-- !== 0;) {
-             var key = keys[i];
-             if (!equal(a[key], b[key])) return false;
-           }
+                 if (key === '__proto__' || key === 'constructor' || key === 'prototype') {
+                   return object;
+                 }
 
-           return true;
-         } // true if both NaN, false otherwise
+                 if (index != lastIndex) {
+                   var objValue = nested[key];
+                   newValue = customizer ? customizer(objValue, key, nested) : undefined$1;
 
+                   if (newValue === undefined$1) {
+                     newValue = isObject(objValue) ? objValue : isIndex(path[index + 1]) ? [] : {};
+                   }
+                 }
 
-         return a !== a && b !== b;
-       };
+                 assignValue(nested, key, newValue);
+                 nested = nested[key];
+               }
 
-       // J. W. Hunt and M. D. McIlroy, An algorithm for differential buffer
-       // comparison, Bell Telephone Laboratories CSTR #41 (1976)
-       // http://www.cs.dartmouth.edu/~doug/
-       // https://en.wikipedia.org/wiki/Longest_common_subsequence_problem
-       //
-       // Expects two arrays, finds longest common sequence
+               return object;
+             }
+             /**
+              * The base implementation of `setData` without support for hot loop shorting.
+              *
+              * @private
+              * @param {Function} func The function to associate metadata with.
+              * @param {*} data The metadata.
+              * @returns {Function} Returns `func`.
+              */
 
-       function LCS(buffer1, buffer2) {
-         var equivalenceClasses = {};
 
-         for (var j = 0; j < buffer2.length; j++) {
-           var item = buffer2[j];
+             var baseSetData = !metaMap ? identity : function (func, data) {
+               metaMap.set(func, data);
+               return func;
+             };
+             /**
+              * The base implementation of `setToString` without support for hot loop shorting.
+              *
+              * @private
+              * @param {Function} func The function to modify.
+              * @param {Function} string The `toString` result.
+              * @returns {Function} Returns `func`.
+              */
 
-           if (equivalenceClasses[item]) {
-             equivalenceClasses[item].push(j);
-           } else {
-             equivalenceClasses[item] = [j];
-           }
-         }
+             var baseSetToString = !defineProperty ? identity : function (func, string) {
+               return defineProperty(func, 'toString', {
+                 'configurable': true,
+                 'enumerable': false,
+                 'value': constant(string),
+                 'writable': true
+               });
+             };
+             /**
+              * The base implementation of `_.shuffle`.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to shuffle.
+              * @returns {Array} Returns the new shuffled array.
+              */
 
-         var NULLRESULT = {
-           buffer1index: -1,
-           buffer2index: -1,
-           chain: null
-         };
-         var candidates = [NULLRESULT];
+             function baseShuffle(collection) {
+               return shuffleSelf(values(collection));
+             }
+             /**
+              * The base implementation of `_.slice` without an iteratee call guard.
+              *
+              * @private
+              * @param {Array} array The array to slice.
+              * @param {number} [start=0] The start position.
+              * @param {number} [end=array.length] The end position.
+              * @returns {Array} Returns the slice of `array`.
+              */
 
-         for (var i = 0; i < buffer1.length; i++) {
-           var _item = buffer1[i];
-           var buffer2indices = equivalenceClasses[_item] || [];
-           var r = 0;
-           var c = candidates[0];
 
-           for (var jx = 0; jx < buffer2indices.length; jx++) {
-             var _j = buffer2indices[jx];
-             var s = void 0;
+             function baseSlice(array, start, end) {
+               var index = -1,
+                   length = array.length;
 
-             for (s = r; s < candidates.length; s++) {
-               if (candidates[s].buffer2index < _j && (s === candidates.length - 1 || candidates[s + 1].buffer2index > _j)) {
-                 break;
+               if (start < 0) {
+                 start = -start > length ? 0 : length + start;
                }
-             }
 
-             if (s < candidates.length) {
-               var newCandidate = {
-                 buffer1index: i,
-                 buffer2index: _j,
-                 chain: candidates[s]
-               };
+               end = end > length ? length : end;
 
-               if (r === candidates.length) {
-                 candidates.push(c);
-               } else {
-                 candidates[r] = c;
+               if (end < 0) {
+                 end += length;
                }
 
-               r = s + 1;
-               c = newCandidate;
+               length = start > end ? 0 : end - start >>> 0;
+               start >>>= 0;
+               var result = Array(length);
 
-               if (r === candidates.length) {
-                 break; // no point in examining further (j)s
+               while (++index < length) {
+                 result[index] = array[index + start];
                }
+
+               return result;
              }
-           }
+             /**
+              * The base implementation of `_.some` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} predicate The function invoked per iteration.
+              * @returns {boolean} Returns `true` if any element passes the predicate check,
+              *  else `false`.
+              */
 
-           candidates[r] = c;
-         } // At this point, we know the LCS: it's in the reverse of the
-         // linked-list through .chain of candidates[candidates.length - 1].
 
+             function baseSome(collection, predicate) {
+               var result;
+               baseEach(collection, function (value, index, collection) {
+                 result = predicate(value, index, collection);
+                 return !result;
+               });
+               return !!result;
+             }
+             /**
+              * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
+              * performs a binary search of `array` to determine the index at which `value`
+              * should be inserted into `array` in order to maintain its sort order.
+              *
+              * @private
+              * @param {Array} array The sorted array to inspect.
+              * @param {*} value The value to evaluate.
+              * @param {boolean} [retHighest] Specify returning the highest qualified index.
+              * @returns {number} Returns the index at which `value` should be inserted
+              *  into `array`.
+              */
 
-         return candidates[candidates.length - 1];
-       } // We apply the LCS to build a 'comm'-style picture of the
-       // offsets and lengths of mismatched chunks in the input
-       // buffers. This is used by diff3MergeRegions.
 
+             function baseSortedIndex(array, value, retHighest) {
+               var low = 0,
+                   high = array == null ? low : array.length;
 
-       function diffIndices(buffer1, buffer2) {
-         var lcs = LCS(buffer1, buffer2);
-         var result = [];
-         var tail1 = buffer1.length;
-         var tail2 = buffer2.length;
+               if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
+                 while (low < high) {
+                   var mid = low + high >>> 1,
+                       computed = array[mid];
 
-         for (var candidate = lcs; candidate !== null; candidate = candidate.chain) {
-           var mismatchLength1 = tail1 - candidate.buffer1index - 1;
-           var mismatchLength2 = tail2 - candidate.buffer2index - 1;
-           tail1 = candidate.buffer1index;
-           tail2 = candidate.buffer2index;
+                   if (computed !== null && !isSymbol(computed) && (retHighest ? computed <= value : computed < value)) {
+                     low = mid + 1;
+                   } else {
+                     high = mid;
+                   }
+                 }
 
-           if (mismatchLength1 || mismatchLength2) {
-             result.push({
-               buffer1: [tail1 + 1, mismatchLength1],
-               buffer1Content: buffer1.slice(tail1 + 1, tail1 + 1 + mismatchLength1),
-               buffer2: [tail2 + 1, mismatchLength2],
-               buffer2Content: buffer2.slice(tail2 + 1, tail2 + 1 + mismatchLength2)
-             });
-           }
-         }
+                 return high;
+               }
 
-         result.reverse();
-         return result;
-       } // We apply the LCS to build a JSON representation of a
-       // independently derived from O, returns a fairly complicated
-       // internal representation of merge decisions it's taken. The
-       // interested reader may wish to consult
-       //
-       // Sanjeev Khanna, Keshav Kunal, and Benjamin C. Pierce.
-       // 'A Formal Investigation of ' In Arvind and Prasad,
-       // editors, Foundations of Software Technology and Theoretical
-       // Computer Science (FSTTCS), December 2007.
-       //
-       // (http://www.cis.upenn.edu/~bcpierce/papers/diff3-short.pdf)
-       //
+               return baseSortedIndexBy(array, value, identity, retHighest);
+             }
+             /**
+              * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
+              * which invokes `iteratee` for `value` and each element of `array` to compute
+              * their sort ranking. The iteratee is invoked with one argument; (value).
+              *
+              * @private
+              * @param {Array} array The sorted array to inspect.
+              * @param {*} value The value to evaluate.
+              * @param {Function} iteratee The iteratee invoked per element.
+              * @param {boolean} [retHighest] Specify returning the highest qualified index.
+              * @returns {number} Returns the index at which `value` should be inserted
+              *  into `array`.
+              */
 
 
-       function diff3MergeRegions(a, o, b) {
-         // "hunks" are array subsets where `a` or `b` are different from `o`
-         // https://www.gnu.org/software/diffutils/manual/html_node/diff3-Hunks.html
-         var hunks = [];
+             function baseSortedIndexBy(array, value, iteratee, retHighest) {
+               var low = 0,
+                   high = array == null ? 0 : array.length;
 
-         function addHunk(h, ab) {
-           hunks.push({
-             ab: ab,
-             oStart: h.buffer1[0],
-             oLength: h.buffer1[1],
-             // length of o to remove
-             abStart: h.buffer2[0],
-             abLength: h.buffer2[1] // length of a/b to insert
-             // abContent: (ab === 'a' ? a : b).slice(h.buffer2[0], h.buffer2[0] + h.buffer2[1])
+               if (high === 0) {
+                 return 0;
+               }
 
-           });
-         }
+               value = iteratee(value);
+               var valIsNaN = value !== value,
+                   valIsNull = value === null,
+                   valIsSymbol = isSymbol(value),
+                   valIsUndefined = value === undefined$1;
+
+               while (low < high) {
+                 var mid = nativeFloor((low + high) / 2),
+                     computed = iteratee(array[mid]),
+                     othIsDefined = computed !== undefined$1,
+                     othIsNull = computed === null,
+                     othIsReflexive = computed === computed,
+                     othIsSymbol = isSymbol(computed);
+
+                 if (valIsNaN) {
+                   var setLow = retHighest || othIsReflexive;
+                 } else if (valIsUndefined) {
+                   setLow = othIsReflexive && (retHighest || othIsDefined);
+                 } else if (valIsNull) {
+                   setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
+                 } else if (valIsSymbol) {
+                   setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
+                 } else if (othIsNull || othIsSymbol) {
+                   setLow = false;
+                 } else {
+                   setLow = retHighest ? computed <= value : computed < value;
+                 }
 
-         diffIndices(o, a).forEach(function (item) {
-           return addHunk(item, 'a');
-         });
-         diffIndices(o, b).forEach(function (item) {
-           return addHunk(item, 'b');
-         });
-         hunks.sort(function (x, y) {
-           return x.oStart - y.oStart;
-         });
-         var results = [];
-         var currOffset = 0;
+                 if (setLow) {
+                   low = mid + 1;
+                 } else {
+                   high = mid;
+                 }
+               }
 
-         function advanceTo(endOffset) {
-           if (endOffset > currOffset) {
-             results.push({
-               stable: true,
-               buffer: 'o',
-               bufferStart: currOffset,
-               bufferLength: endOffset - currOffset,
-               bufferContent: o.slice(currOffset, endOffset)
-             });
-             currOffset = endOffset;
-           }
-         }
+               return nativeMin(high, MAX_ARRAY_INDEX);
+             }
+             /**
+              * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
+              * support for iteratee shorthands.
+              *
+              * @private
+              * @param {Array} array The array to inspect.
+              * @param {Function} [iteratee] The iteratee invoked per element.
+              * @returns {Array} Returns the new duplicate free array.
+              */
 
-         while (hunks.length) {
-           var hunk = hunks.shift();
-           var regionStart = hunk.oStart;
-           var regionEnd = hunk.oStart + hunk.oLength;
-           var regionHunks = [hunk];
-           advanceTo(regionStart); // Try to pull next overlapping hunk into this region
 
-           while (hunks.length) {
-             var nextHunk = hunks[0];
-             var nextHunkStart = nextHunk.oStart;
-             if (nextHunkStart > regionEnd) break; // no overlap
+             function baseSortedUniq(array, iteratee) {
+               var index = -1,
+                   length = array.length,
+                   resIndex = 0,
+                   result = [];
 
-             regionEnd = Math.max(regionEnd, nextHunkStart + nextHunk.oLength);
-             regionHunks.push(hunks.shift());
-           }
+               while (++index < length) {
+                 var value = array[index],
+                     computed = iteratee ? iteratee(value) : value;
 
-           if (regionHunks.length === 1) {
-             // Only one hunk touches this region, meaning that there is no conflict here.
-             // Either `a` or `b` is inserting into a region of `o` unchanged by the other.
-             if (hunk.abLength > 0) {
-               var buffer = hunk.ab === 'a' ? a : b;
-               results.push({
-                 stable: true,
-                 buffer: hunk.ab,
-                 bufferStart: hunk.abStart,
-                 bufferLength: hunk.abLength,
-                 bufferContent: buffer.slice(hunk.abStart, hunk.abStart + hunk.abLength)
-               });
+                 if (!index || !eq(computed, seen)) {
+                   var seen = computed;
+                   result[resIndex++] = value === 0 ? 0 : value;
+                 }
+               }
+
+               return result;
              }
-           } else {
-             // A true a/b conflict. Determine the bounds involved from `a`, `o`, and `b`.
-             // Effectively merge all the `a` hunks into one giant hunk, then do the
-             // same for the `b` hunks; then, correct for skew in the regions of `o`
-             // that each side changed, and report appropriate spans for the three sides.
-             var bounds = {
-               a: [a.length, -1, o.length, -1],
-               b: [b.length, -1, o.length, -1]
-             };
+             /**
+              * The base implementation of `_.toNumber` which doesn't ensure correct
+              * conversions of binary, hexadecimal, or octal string values.
+              *
+              * @private
+              * @param {*} value The value to process.
+              * @returns {number} Returns the number.
+              */
 
-             while (regionHunks.length) {
-               hunk = regionHunks.shift();
-               var oStart = hunk.oStart;
-               var oEnd = oStart + hunk.oLength;
-               var abStart = hunk.abStart;
-               var abEnd = abStart + hunk.abLength;
-               var _b = bounds[hunk.ab];
-               _b[0] = Math.min(abStart, _b[0]);
-               _b[1] = Math.max(abEnd, _b[1]);
-               _b[2] = Math.min(oStart, _b[2]);
-               _b[3] = Math.max(oEnd, _b[3]);
+
+             function baseToNumber(value) {
+               if (typeof value == 'number') {
+                 return value;
+               }
+
+               if (isSymbol(value)) {
+                 return NAN;
+               }
+
+               return +value;
              }
+             /**
+              * The base implementation of `_.toString` which doesn't convert nullish
+              * values to empty strings.
+              *
+              * @private
+              * @param {*} value The value to process.
+              * @returns {string} Returns the string.
+              */
 
-             var aStart = bounds.a[0] + (regionStart - bounds.a[2]);
-             var aEnd = bounds.a[1] + (regionEnd - bounds.a[3]);
-             var bStart = bounds.b[0] + (regionStart - bounds.b[2]);
-             var bEnd = bounds.b[1] + (regionEnd - bounds.b[3]);
-             var result = {
-               stable: false,
-               aStart: aStart,
-               aLength: aEnd - aStart,
-               aContent: a.slice(aStart, aEnd),
-               oStart: regionStart,
-               oLength: regionEnd - regionStart,
-               oContent: o.slice(regionStart, regionEnd),
-               bStart: bStart,
-               bLength: bEnd - bStart,
-               bContent: b.slice(bStart, bEnd)
-             };
-             results.push(result);
-           }
 
-           currOffset = regionEnd;
-         }
+             function baseToString(value) {
+               // Exit early for strings to avoid a performance hit in some environments.
+               if (typeof value == 'string') {
+                 return value;
+               }
 
-         advanceTo(o.length);
-         return results;
-       } // Applies the output of diff3MergeRegions to actually
-       // construct the merged buffer; the returned result alternates
-       // between 'ok' and 'conflict' blocks.
-       // A "false conflict" is where `a` and `b` both change the same from `o`
+               if (isArray(value)) {
+                 // Recursively convert values (susceptible to call stack limits).
+                 return arrayMap(value, baseToString) + '';
+               }
 
+               if (isSymbol(value)) {
+                 return symbolToString ? symbolToString.call(value) : '';
+               }
 
-       function diff3Merge(a, o, b, options) {
-         var defaults = {
-           excludeFalseConflicts: true,
-           stringSeparator: /\s+/
-         };
-         options = Object.assign(defaults, options);
-         var aString = typeof a === 'string';
-         var oString = typeof o === 'string';
-         var bString = typeof b === 'string';
-         if (aString) a = a.split(options.stringSeparator);
-         if (oString) o = o.split(options.stringSeparator);
-         if (bString) b = b.split(options.stringSeparator);
-         var results = [];
-         var regions = diff3MergeRegions(a, o, b);
-         var okBuffer = [];
+               var result = value + '';
+               return result == '0' && 1 / value == -INFINITY ? '-0' : result;
+             }
+             /**
+              * The base implementation of `_.uniqBy` without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Array} array The array to inspect.
+              * @param {Function} [iteratee] The iteratee invoked per element.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns the new duplicate free array.
+              */
 
-         function flushOk() {
-           if (okBuffer.length) {
-             results.push({
-               ok: okBuffer
-             });
-           }
 
-           okBuffer = [];
-         }
+             function baseUniq(array, iteratee, comparator) {
+               var index = -1,
+                   includes = arrayIncludes,
+                   length = array.length,
+                   isCommon = true,
+                   result = [],
+                   seen = result;
 
-         function isFalseConflict(a, b) {
-           if (a.length !== b.length) return false;
+               if (comparator) {
+                 isCommon = false;
+                 includes = arrayIncludesWith;
+               } else if (length >= LARGE_ARRAY_SIZE) {
+                 var set = iteratee ? null : createSet(array);
 
-           for (var i = 0; i < a.length; i++) {
-             if (a[i] !== b[i]) return false;
-           }
+                 if (set) {
+                   return setToArray(set);
+                 }
 
-           return true;
-         }
+                 isCommon = false;
+                 includes = cacheHas;
+                 seen = new SetCache();
+               } else {
+                 seen = iteratee ? [] : result;
+               }
 
-         regions.forEach(function (region) {
-           if (region.stable) {
-             var _okBuffer;
+               outer: while (++index < length) {
+                 var value = array[index],
+                     computed = iteratee ? iteratee(value) : value;
+                 value = comparator || value !== 0 ? value : 0;
 
-             (_okBuffer = okBuffer).push.apply(_okBuffer, _toConsumableArray(region.bufferContent));
-           } else {
-             if (options.excludeFalseConflicts && isFalseConflict(region.aContent, region.bContent)) {
-               var _okBuffer2;
+                 if (isCommon && computed === computed) {
+                   var seenIndex = seen.length;
 
-               (_okBuffer2 = okBuffer).push.apply(_okBuffer2, _toConsumableArray(region.aContent));
-             } else {
-               flushOk();
-               results.push({
-                 conflict: {
-                   a: region.aContent,
-                   aIndex: region.aStart,
-                   o: region.oContent,
-                   oIndex: region.oStart,
-                   b: region.bContent,
-                   bIndex: region.bStart
+                   while (seenIndex--) {
+                     if (seen[seenIndex] === computed) {
+                       continue outer;
+                     }
+                   }
+
+                   if (iteratee) {
+                     seen.push(computed);
+                   }
+
+                   result.push(value);
+                 } else if (!includes(seen, computed, comparator)) {
+                   if (seen !== result) {
+                     seen.push(computed);
+                   }
+
+                   result.push(value);
                  }
-               });
+               }
+
+               return result;
              }
-           }
-         });
-         flushOk();
-         return results;
-       }
+             /**
+              * The base implementation of `_.unset`.
+              *
+              * @private
+              * @param {Object} object The object to modify.
+              * @param {Array|string} path The property path to unset.
+              * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+              */
 
-       function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
-         discardTags = discardTags || {};
-         var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
 
-         var _conflicts = [];
+             function baseUnset(object, path) {
+               path = castPath(path, object);
+               object = parent(object, path);
+               return object == null || delete object[toKey(last(path))];
+             }
+             /**
+              * The base implementation of `_.update`.
+              *
+              * @private
+              * @param {Object} object The object to modify.
+              * @param {Array|string} path The path of the property to update.
+              * @param {Function} updater The function to produce the updated value.
+              * @param {Function} [customizer] The function to customize path creation.
+              * @returns {Object} Returns `object`.
+              */
 
-         function user(d) {
-           return typeof formatUser === 'function' ? formatUser(d) : d;
-         }
 
-         function mergeLocation(remote, target) {
-           function pointEqual(a, b) {
-             var epsilon = 1e-6;
-             return Math.abs(a[0] - b[0]) < epsilon && Math.abs(a[1] - b[1]) < epsilon;
-           }
+             function baseUpdate(object, path, updater, customizer) {
+               return baseSet(object, path, updater(baseGet(object, path)), customizer);
+             }
+             /**
+              * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
+              * without support for iteratee shorthands.
+              *
+              * @private
+              * @param {Array} array The array to query.
+              * @param {Function} predicate The function invoked per iteration.
+              * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
+              * @param {boolean} [fromRight] Specify iterating from right to left.
+              * @returns {Array} Returns the slice of `array`.
+              */
 
-           if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
-             return target;
-           }
 
-           if (_option === 'force_remote') {
-             return target.update({
-               loc: remote.loc
-             });
-           }
+             function baseWhile(array, predicate, isDrop, fromRight) {
+               var length = array.length,
+                   index = fromRight ? length : -1;
 
-           _conflicts.push(_t('merge_remote_changes.conflict.location', {
-             user: user(remote.user)
-           }));
+               while ((fromRight ? index-- : ++index < length) && predicate(array[index], index, array)) {}
 
-           return target;
-         }
+               return isDrop ? baseSlice(array, fromRight ? 0 : index, fromRight ? index + 1 : length) : baseSlice(array, fromRight ? index + 1 : 0, fromRight ? length : index);
+             }
+             /**
+              * The base implementation of `wrapperValue` which returns the result of
+              * performing a sequence of actions on the unwrapped `value`, where each
+              * successive action is supplied the return value of the previous.
+              *
+              * @private
+              * @param {*} value The unwrapped value.
+              * @param {Array} actions Actions to perform to resolve the unwrapped value.
+              * @returns {*} Returns the resolved value.
+              */
 
-         function mergeNodes(base, remote, target) {
-           if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
-             return target;
-           }
 
-           if (_option === 'force_remote') {
-             return target.update({
-               nodes: remote.nodes
-             });
-           }
+             function baseWrapperValue(value, actions) {
+               var result = value;
 
-           var ccount = _conflicts.length;
-           var o = base.nodes || [];
-           var a = target.nodes || [];
-           var b = remote.nodes || [];
-           var nodes = [];
-           var hunks = diff3Merge(a, o, b, {
-             excludeFalseConflicts: true
-           });
+               if (result instanceof LazyWrapper) {
+                 result = result.value();
+               }
 
-           for (var i = 0; i < hunks.length; i++) {
-             var hunk = hunks[i];
+               return arrayReduce(actions, function (result, action) {
+                 return action.func.apply(action.thisArg, arrayPush([result], action.args));
+               }, result);
+             }
+             /**
+              * The base implementation of methods like `_.xor`, without support for
+              * iteratee shorthands, that accepts an array of arrays to inspect.
+              *
+              * @private
+              * @param {Array} arrays The arrays to inspect.
+              * @param {Function} [iteratee] The iteratee invoked per element.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns the new array of values.
+              */
 
-             if (hunk.ok) {
-               nodes.push.apply(nodes, hunk.ok);
-             } else {
-               // for all conflicts, we can assume c.a !== c.b
-               // because `diff3Merge` called with `true` option to exclude false conflicts..
-               var c = hunk.conflict;
 
-               if (fastDeepEqual(c.o, c.a)) {
-                 // only changed remotely
-                 nodes.push.apply(nodes, c.b);
-               } else if (fastDeepEqual(c.o, c.b)) {
-                 // only changed locally
-                 nodes.push.apply(nodes, c.a);
-               } else {
-                 // changed both locally and remotely
-                 _conflicts.push(_t('merge_remote_changes.conflict.nodelist', {
-                   user: user(remote.user)
-                 }));
+             function baseXor(arrays, iteratee, comparator) {
+               var length = arrays.length;
 
-                 break;
+               if (length < 2) {
+                 return length ? baseUniq(arrays[0]) : [];
                }
-             }
-           }
 
-           return _conflicts.length === ccount ? target.update({
-             nodes: nodes
-           }) : target;
-         }
+               var index = -1,
+                   result = Array(length);
 
-         function mergeChildren(targetWay, children, updates, graph) {
-           function isUsed(node, targetWay) {
-             var hasInterestingParent = graph.parentWays(node).some(function (way) {
-               return way.id !== targetWay.id;
-             });
-             return node.hasInterestingTags() || hasInterestingParent || graph.parentRelations(node).length > 0;
-           }
+               while (++index < length) {
+                 var array = arrays[index],
+                     othIndex = -1;
 
-           var ccount = _conflicts.length;
+                 while (++othIndex < length) {
+                   if (othIndex != index) {
+                     result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
+                   }
+                 }
+               }
 
-           for (var i = 0; i < children.length; i++) {
-             var id = children[i];
-             var node = graph.hasEntity(id); // remove unused childNodes..
+               return baseUniq(baseFlatten(result, 1), iteratee, comparator);
+             }
+             /**
+              * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
+              *
+              * @private
+              * @param {Array} props The property identifiers.
+              * @param {Array} values The property values.
+              * @param {Function} assignFunc The function to assign values.
+              * @returns {Object} Returns the new object.
+              */
 
-             if (targetWay.nodes.indexOf(id) === -1) {
-               if (node && !isUsed(node, targetWay)) {
-                 updates.removeIds.push(id);
+
+             function baseZipObject(props, values, assignFunc) {
+               var index = -1,
+                   length = props.length,
+                   valsLength = values.length,
+                   result = {};
+
+               while (++index < length) {
+                 var value = index < valsLength ? values[index] : undefined$1;
+                 assignFunc(result, props[index], value);
                }
 
-               continue;
-             } // restore used childNodes..
+               return result;
+             }
+             /**
+              * Casts `value` to an empty array if it's not an array like object.
+              *
+              * @private
+              * @param {*} value The value to inspect.
+              * @returns {Array|Object} Returns the cast array-like object.
+              */
 
 
-             var local = localGraph.hasEntity(id);
-             var remote = remoteGraph.hasEntity(id);
-             var target;
+             function castArrayLikeObject(value) {
+               return isArrayLikeObject(value) ? value : [];
+             }
+             /**
+              * Casts `value` to `identity` if it's not a function.
+              *
+              * @private
+              * @param {*} value The value to inspect.
+              * @returns {Function} Returns cast function.
+              */
 
-             if (_option === 'force_remote' && remote && remote.visible) {
-               updates.replacements.push(remote);
-             } else if (_option === 'force_local' && local) {
-               target = osmEntity(local);
 
-               if (remote) {
-                 target = target.update({
-                   version: remote.version
-                 });
-               }
+             function castFunction(value) {
+               return typeof value == 'function' ? value : identity;
+             }
+             /**
+              * Casts `value` to a path array if it's not one.
+              *
+              * @private
+              * @param {*} value The value to inspect.
+              * @param {Object} [object] The object to query keys on.
+              * @returns {Array} Returns the cast property path array.
+              */
 
-               updates.replacements.push(target);
-             } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
-               target = osmEntity(local, {
-                 version: remote.version
-               });
 
-               if (remote.visible) {
-                 target = mergeLocation(remote, target);
-               } else {
-                 _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
-                   user: user(remote.user)
-                 }));
+             function castPath(value, object) {
+               if (isArray(value)) {
+                 return value;
                }
 
-               if (_conflicts.length !== ccount) break;
-               updates.replacements.push(target);
+               return isKey(value, object) ? [value] : stringToPath(toString(value));
+             }
+             /**
+              * A `baseRest` alias which can be replaced with `identity` by module
+              * replacement plugins.
+              *
+              * @private
+              * @type {Function}
+              * @param {Function} func The function to apply a rest parameter to.
+              * @returns {Function} Returns the new function.
+              */
+
+
+             var castRest = baseRest;
+             /**
+              * Casts `array` to a slice if it's needed.
+              *
+              * @private
+              * @param {Array} array The array to inspect.
+              * @param {number} start The start position.
+              * @param {number} [end=array.length] The end position.
+              * @returns {Array} Returns the cast slice.
+              */
+
+             function castSlice(array, start, end) {
+               var length = array.length;
+               end = end === undefined$1 ? length : end;
+               return !start && end >= length ? array : baseSlice(array, start, end);
              }
-           }
+             /**
+              * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
+              *
+              * @private
+              * @param {number|Object} id The timer id or timeout object of the timer to clear.
+              */
 
-           return targetWay;
-         }
 
-         function updateChildren(updates, graph) {
-           for (var i = 0; i < updates.replacements.length; i++) {
-             graph = graph.replace(updates.replacements[i]);
-           }
+             var clearTimeout = ctxClearTimeout || function (id) {
+               return root.clearTimeout(id);
+             };
+             /**
+              * Creates a clone of  `buffer`.
+              *
+              * @private
+              * @param {Buffer} buffer The buffer to clone.
+              * @param {boolean} [isDeep] Specify a deep clone.
+              * @returns {Buffer} Returns the cloned buffer.
+              */
 
-           if (updates.removeIds.length) {
-             graph = actionDeleteMultiple(updates.removeIds)(graph);
-           }
 
-           return graph;
-         }
+             function cloneBuffer(buffer, isDeep) {
+               if (isDeep) {
+                 return buffer.slice();
+               }
 
-         function mergeMembers(remote, target) {
-           if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
-             return target;
-           }
+               var length = buffer.length,
+                   result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
+               buffer.copy(result);
+               return result;
+             }
+             /**
+              * Creates a clone of `arrayBuffer`.
+              *
+              * @private
+              * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
+              * @returns {ArrayBuffer} Returns the cloned array buffer.
+              */
 
-           if (_option === 'force_remote') {
-             return target.update({
-               members: remote.members
-             });
-           }
 
-           _conflicts.push(_t('merge_remote_changes.conflict.memberlist', {
-             user: user(remote.user)
-           }));
+             function cloneArrayBuffer(arrayBuffer) {
+               var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
+               new Uint8Array(result).set(new Uint8Array(arrayBuffer));
+               return result;
+             }
+             /**
+              * Creates a clone of `dataView`.
+              *
+              * @private
+              * @param {Object} dataView The data view to clone.
+              * @param {boolean} [isDeep] Specify a deep clone.
+              * @returns {Object} Returns the cloned data view.
+              */
 
-           return target;
-         }
 
-         function mergeTags(base, remote, target) {
-           if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
-             return target;
-           }
+             function cloneDataView(dataView, isDeep) {
+               var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
+               return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
+             }
+             /**
+              * Creates a clone of `regexp`.
+              *
+              * @private
+              * @param {Object} regexp The regexp to clone.
+              * @returns {Object} Returns the cloned regexp.
+              */
 
-           if (_option === 'force_remote') {
-             return target.update({
-               tags: remote.tags
-             });
-           }
 
-           var ccount = _conflicts.length;
-           var o = base.tags || {};
-           var a = target.tags || {};
-           var b = remote.tags || {};
-           var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b)).filter(function (k) {
-             return !discardTags[k];
-           });
-           var tags = Object.assign({}, a); // shallow copy
+             function cloneRegExp(regexp) {
+               var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
+               result.lastIndex = regexp.lastIndex;
+               return result;
+             }
+             /**
+              * Creates a clone of the `symbol` object.
+              *
+              * @private
+              * @param {Object} symbol The symbol object to clone.
+              * @returns {Object} Returns the cloned symbol object.
+              */
 
-           var changed = false;
 
-           for (var i = 0; i < keys.length; i++) {
-             var k = keys[i];
+             function cloneSymbol(symbol) {
+               return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
+             }
+             /**
+              * Creates a clone of `typedArray`.
+              *
+              * @private
+              * @param {Object} typedArray The typed array to clone.
+              * @param {boolean} [isDeep] Specify a deep clone.
+              * @returns {Object} Returns the cloned typed array.
+              */
 
-             if (o[k] !== b[k] && a[k] !== b[k]) {
-               // changed remotely..
-               if (o[k] !== a[k]) {
-                 // changed locally..
-                 _conflicts.push(_t('merge_remote_changes.conflict.tags', {
-                   tag: k,
-                   local: a[k],
-                   remote: b[k],
-                   user: user(remote.user)
-                 }));
-               } else {
-                 // unchanged locally, accept remote change..
-                 if (b.hasOwnProperty(k)) {
-                   tags[k] = b[k];
-                 } else {
-                   delete tags[k];
-                 }
 
-                 changed = true;
-               }
+             function cloneTypedArray(typedArray, isDeep) {
+               var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
+               return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
              }
-           }
+             /**
+              * Compares values to sort them in ascending order.
+              *
+              * @private
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @returns {number} Returns the sort order indicator for `value`.
+              */
 
-           return changed && _conflicts.length === ccount ? target.update({
-             tags: tags
-           }) : target;
-         } //  `graph.base()` is the common ancestor of the two graphs.
-         //  `localGraph` contains user's edits up to saving
-         //  `remoteGraph` contains remote edits to modified nodes
-         //  `graph` must be a descendent of `localGraph` and may include
-         //      some conflict resolution actions performed on it.
-         //
-         //                  --- ... --- `localGraph` -- ... -- `graph`
-         //                 /
-         //  `graph.base()` --- ... --- `remoteGraph`
-         //
 
+             function compareAscending(value, other) {
+               if (value !== other) {
+                 var valIsDefined = value !== undefined$1,
+                     valIsNull = value === null,
+                     valIsReflexive = value === value,
+                     valIsSymbol = isSymbol(value);
+                 var othIsDefined = other !== undefined$1,
+                     othIsNull = other === null,
+                     othIsReflexive = other === other,
+                     othIsSymbol = isSymbol(other);
 
-         var action = function action(graph) {
-           var updates = {
-             replacements: [],
-             removeIds: []
-           };
-           var base = graph.base().entities[id];
-           var local = localGraph.entity(id);
-           var remote = remoteGraph.entity(id);
-           var target = osmEntity(local, {
-             version: remote.version
-           }); // delete/undelete
+                 if (!othIsNull && !othIsSymbol && !valIsSymbol && value > other || valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol || valIsNull && othIsDefined && othIsReflexive || !valIsDefined && othIsReflexive || !valIsReflexive) {
+                   return 1;
+                 }
 
-           if (!remote.visible) {
-             if (_option === 'force_remote') {
-               return actionDeleteMultiple([id])(graph);
-             } else if (_option === 'force_local') {
-               if (target.type === 'way') {
-                 target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
-                 graph = updateChildren(updates, graph);
+                 if (!valIsNull && !valIsSymbol && !othIsSymbol && value < other || othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol || othIsNull && valIsDefined && valIsReflexive || !othIsDefined && valIsReflexive || !othIsReflexive) {
+                   return -1;
+                 }
                }
 
-               return graph.replace(target);
-             } else {
-               _conflicts.push(_t('merge_remote_changes.conflict.deleted', {
-                 user: user(remote.user)
-               }));
-
-               return graph; // do nothing
+               return 0;
              }
-           } // merge
-
-
-           if (target.type === 'node') {
-             target = mergeLocation(remote, target);
-           } else if (target.type === 'way') {
-             // pull in any child nodes that may not be present locally..
-             graph.rebase(remoteGraph.childNodes(remote), [graph], false);
-             target = mergeNodes(base, remote, target);
-             target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
-           } else if (target.type === 'relation') {
-             target = mergeMembers(remote, target);
-           }
-
-           target = mergeTags(base, remote, target);
+             /**
+              * Used by `_.orderBy` to compare multiple properties of a value to another
+              * and stable sort them.
+              *
+              * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
+              * specify an order of "desc" for descending or "asc" for ascending sort order
+              * of corresponding values.
+              *
+              * @private
+              * @param {Object} object The object to compare.
+              * @param {Object} other The other object to compare.
+              * @param {boolean[]|string[]} orders The order to sort by for each property.
+              * @returns {number} Returns the sort order indicator for `object`.
+              */
 
-           if (!_conflicts.length) {
-             graph = updateChildren(updates, graph).replace(target);
-           }
 
-           return graph;
-         };
+             function compareMultiple(object, other, orders) {
+               var index = -1,
+                   objCriteria = object.criteria,
+                   othCriteria = other.criteria,
+                   length = objCriteria.length,
+                   ordersLength = orders.length;
 
-         action.withOption = function (opt) {
-           _option = opt;
-           return action;
-         };
+               while (++index < length) {
+                 var result = compareAscending(objCriteria[index], othCriteria[index]);
 
-         action.conflicts = function () {
-           return _conflicts;
-         };
+                 if (result) {
+                   if (index >= ordersLength) {
+                     return result;
+                   }
 
-         return action;
-       }
+                   var order = orders[index];
+                   return result * (order == 'desc' ? -1 : 1);
+                 }
+               } // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
+               // that causes it, under certain circumstances, to provide the same value for
+               // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
+               // for more details.
+               //
+               // This also ensures a stable sort in V8 and other engines.
+               // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
 
-       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
 
-       function actionMove(moveIDs, tryDelta, projection, cache) {
-         var _delta = tryDelta;
+               return object.index - other.index;
+             }
+             /**
+              * Creates an array that is the composition of partially applied arguments,
+              * placeholders, and provided arguments into a single array of arguments.
+              *
+              * @private
+              * @param {Array} args The provided arguments.
+              * @param {Array} partials The arguments to prepend to those provided.
+              * @param {Array} holders The `partials` placeholder indexes.
+              * @params {boolean} [isCurried] Specify composing for a curried function.
+              * @returns {Array} Returns the new array of composed arguments.
+              */
 
-         function setupCache(graph) {
-           function canMove(nodeID) {
-             // Allow movement of any node that is in the selectedIDs list..
-             if (moveIDs.indexOf(nodeID) !== -1) return true; // Allow movement of a vertex where 2 ways meet..
 
-             var parents = graph.parentWays(graph.entity(nodeID));
-             if (parents.length < 3) return true; // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
+             function composeArgs(args, partials, holders, isCurried) {
+               var argsIndex = -1,
+                   argsLength = args.length,
+                   holdersLength = holders.length,
+                   leftIndex = -1,
+                   leftLength = partials.length,
+                   rangeLength = nativeMax(argsLength - holdersLength, 0),
+                   result = Array(leftLength + rangeLength),
+                   isUncurried = !isCurried;
 
-             var parentsMoving = parents.every(function (way) {
-               return cache.moving[way.id];
-             });
-             if (!parentsMoving) delete cache.moving[nodeID];
-             return parentsMoving;
-           }
+               while (++leftIndex < leftLength) {
+                 result[leftIndex] = partials[leftIndex];
+               }
 
-           function cacheEntities(ids) {
-             for (var i = 0; i < ids.length; i++) {
-               var id = ids[i];
-               if (cache.moving[id]) continue;
-               cache.moving[id] = true;
-               var entity = graph.hasEntity(id);
-               if (!entity) continue;
+               while (++argsIndex < holdersLength) {
+                 if (isUncurried || argsIndex < argsLength) {
+                   result[holders[argsIndex]] = args[argsIndex];
+                 }
+               }
 
-               if (entity.type === 'node') {
-                 cache.nodes.push(id);
-                 cache.startLoc[id] = entity.loc;
-               } else if (entity.type === 'way') {
-                 cache.ways.push(id);
-                 cacheEntities(entity.nodes);
-               } else {
-                 cacheEntities(entity.members.map(function (member) {
-                   return member.id;
-                 }));
+               while (rangeLength--) {
+                 result[leftIndex++] = args[argsIndex++];
                }
-             }
-           }
 
-           function cacheIntersections(ids) {
-             function isEndpoint(way, id) {
-               return !way.isClosed() && !!way.affix(id);
+               return result;
              }
+             /**
+              * This function is like `composeArgs` except that the arguments composition
+              * is tailored for `_.partialRight`.
+              *
+              * @private
+              * @param {Array} args The provided arguments.
+              * @param {Array} partials The arguments to append to those provided.
+              * @param {Array} holders The `partials` placeholder indexes.
+              * @params {boolean} [isCurried] Specify composing for a curried function.
+              * @returns {Array} Returns the new array of composed arguments.
+              */
 
-             for (var i = 0; i < ids.length; i++) {
-               var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.
 
-               var childNodes = graph.childNodes(graph.entity(id));
+             function composeArgsRight(args, partials, holders, isCurried) {
+               var argsIndex = -1,
+                   argsLength = args.length,
+                   holdersIndex = -1,
+                   holdersLength = holders.length,
+                   rightIndex = -1,
+                   rightLength = partials.length,
+                   rangeLength = nativeMax(argsLength - holdersLength, 0),
+                   result = Array(rangeLength + rightLength),
+                   isUncurried = !isCurried;
 
-               for (var j = 0; j < childNodes.length; j++) {
-                 var node = childNodes[j];
-                 var parents = graph.parentWays(node);
-                 if (parents.length !== 2) continue;
-                 var moved = graph.entity(id);
-                 var unmoved = null;
+               while (++argsIndex < rangeLength) {
+                 result[argsIndex] = args[argsIndex];
+               }
 
-                 for (var k = 0; k < parents.length; k++) {
-                   var way = parents[k];
+               var offset = argsIndex;
 
-                   if (!cache.moving[way.id]) {
-                     unmoved = way;
-                     break;
-                   }
+               while (++rightIndex < rightLength) {
+                 result[offset + rightIndex] = partials[rightIndex];
+               }
+
+               while (++holdersIndex < holdersLength) {
+                 if (isUncurried || argsIndex < argsLength) {
+                   result[offset + holders[holdersIndex]] = args[argsIndex++];
                  }
+               }
 
-                 if (!unmoved) continue; // exclude ways that are overly connected..
+               return result;
+             }
+             /**
+              * Copies the values of `source` to `array`.
+              *
+              * @private
+              * @param {Array} source The array to copy values from.
+              * @param {Array} [array=[]] The array to copy values to.
+              * @returns {Array} Returns `array`.
+              */
 
-                 if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) continue;
-                 if (moved.isArea() || unmoved.isArea()) continue;
-                 cache.intersections.push({
-                   nodeId: node.id,
-                   movedId: moved.id,
-                   unmovedId: unmoved.id,
-                   movedIsEP: isEndpoint(moved, node.id),
-                   unmovedIsEP: isEndpoint(unmoved, node.id)
-                 });
+
+             function copyArray(source, array) {
+               var index = -1,
+                   length = source.length;
+               array || (array = Array(length));
+
+               while (++index < length) {
+                 array[index] = source[index];
                }
+
+               return array;
              }
-           }
+             /**
+              * Copies properties of `source` to `object`.
+              *
+              * @private
+              * @param {Object} source The object to copy properties from.
+              * @param {Array} props The property identifiers to copy.
+              * @param {Object} [object={}] The object to copy properties to.
+              * @param {Function} [customizer] The function to customize copied values.
+              * @returns {Object} Returns `object`.
+              */
 
-           if (!cache) {
-             cache = {};
-           }
 
-           if (!cache.ok) {
-             cache.moving = {};
-             cache.intersections = [];
-             cache.replacedVertex = {};
-             cache.startLoc = {};
-             cache.nodes = [];
-             cache.ways = [];
-             cacheEntities(moveIDs);
-             cacheIntersections(cache.ways);
-             cache.nodes = cache.nodes.filter(canMove);
-             cache.ok = true;
-           }
-         } // Place a vertex where the moved vertex used to be, to preserve way shape..
-         //
-         //  Start:
-         //      b ---- e
-         //     / \
-         //    /   \
-         //   /     \
-         //  a       c
-         //
-         //      *               node '*' added to preserve shape
-         //     / \
-         //    /   b ---- e      way `b,e` moved here:
-         //   /     \
-         //  a       c
-         //
-         //
+             function copyObject(source, props, object, customizer) {
+               var isNew = !object;
+               object || (object = {});
+               var index = -1,
+                   length = props.length;
 
+               while (++index < length) {
+                 var key = props[index];
+                 var newValue = customizer ? customizer(object[key], source[key], key, object, source) : undefined$1;
 
-         function replaceMovedVertex(nodeId, wayId, graph, delta) {
-           var way = graph.entity(wayId);
-           var moved = graph.entity(nodeId);
-           var movedIndex = way.nodes.indexOf(nodeId);
-           var len, prevIndex, nextIndex;
+                 if (newValue === undefined$1) {
+                   newValue = source[key];
+                 }
 
-           if (way.isClosed()) {
-             len = way.nodes.length - 1;
-             prevIndex = (movedIndex + len - 1) % len;
-             nextIndex = (movedIndex + len + 1) % len;
-           } else {
-             len = way.nodes.length;
-             prevIndex = movedIndex - 1;
-             nextIndex = movedIndex + 1;
-           }
+                 if (isNew) {
+                   baseAssignValue(object, key, newValue);
+                 } else {
+                   assignValue(object, key, newValue);
+                 }
+               }
 
-           var prev = graph.hasEntity(way.nodes[prevIndex]);
-           var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
+               return object;
+             }
+             /**
+              * Copies own symbols of `source` to `object`.
+              *
+              * @private
+              * @param {Object} source The object to copy symbols from.
+              * @param {Object} [object={}] The object to copy symbols to.
+              * @returns {Object} Returns `object`.
+              */
 
-           if (!prev || !next) return graph;
-           var key = wayId + '_' + nodeId;
-           var orig = cache.replacedVertex[key];
 
-           if (!orig) {
-             orig = osmNode();
-             cache.replacedVertex[key] = orig;
-             cache.startLoc[orig.id] = cache.startLoc[nodeId];
-           }
+             function copySymbols(source, object) {
+               return copyObject(source, getSymbols(source), object);
+             }
+             /**
+              * Copies own and inherited symbols of `source` to `object`.
+              *
+              * @private
+              * @param {Object} source The object to copy symbols from.
+              * @param {Object} [object={}] The object to copy symbols to.
+              * @returns {Object} Returns `object`.
+              */
 
-           var start, end;
 
-           if (delta) {
-             start = projection(cache.startLoc[nodeId]);
-             end = projection.invert(geoVecAdd(start, delta));
-           } else {
-             end = cache.startLoc[nodeId];
-           }
+             function copySymbolsIn(source, object) {
+               return copyObject(source, getSymbolsIn(source), object);
+             }
+             /**
+              * Creates a function like `_.groupBy`.
+              *
+              * @private
+              * @param {Function} setter The function to set accumulator values.
+              * @param {Function} [initializer] The accumulator object initializer.
+              * @returns {Function} Returns the new aggregator function.
+              */
 
-           orig = orig.move(end);
-           var angle = Math.abs(geoAngle(orig, prev, projection) - geoAngle(orig, next, projection)) * 180 / Math.PI; // Don't add orig vertex if it would just make a straight line..
 
-           if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
+             function createAggregator(setter, initializer) {
+               return function (collection, iteratee) {
+                 var func = isArray(collection) ? arrayAggregator : baseAggregator,
+                     accumulator = initializer ? initializer() : {};
+                 return func(collection, setter, getIteratee(iteratee, 2), accumulator);
+               };
+             }
+             /**
+              * Creates a function like `_.assign`.
+              *
+              * @private
+              * @param {Function} assigner The function to assign values.
+              * @returns {Function} Returns the new assigner function.
+              */
 
-           var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
-           var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
-           var d1 = geoPathLength(p1);
-           var d2 = geoPathLength(p2);
-           var insertAt = d1 <= d2 ? movedIndex : nextIndex; // moving around closed loop?
 
-           if (way.isClosed() && insertAt === 0) insertAt = len;
-           way = way.addNode(orig.id, insertAt);
-           return graph.replace(orig).replace(way);
-         } // Remove duplicate vertex that might have been added by
-         // replaceMovedVertex.  This is done after the unzorro checks.
+             function createAssigner(assigner) {
+               return baseRest(function (object, sources) {
+                 var index = -1,
+                     length = sources.length,
+                     customizer = length > 1 ? sources[length - 1] : undefined$1,
+                     guard = length > 2 ? sources[2] : undefined$1;
+                 customizer = assigner.length > 3 && typeof customizer == 'function' ? (length--, customizer) : undefined$1;
 
+                 if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+                   customizer = length < 3 ? undefined$1 : customizer;
+                   length = 1;
+                 }
 
-         function removeDuplicateVertices(wayId, graph) {
-           var way = graph.entity(wayId);
-           var epsilon = 1e-6;
-           var prev, curr;
+                 object = Object(object);
 
-           function isInteresting(node, graph) {
-             return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
-           }
+                 while (++index < length) {
+                   var source = sources[index];
 
-           for (var i = 0; i < way.nodes.length; i++) {
-             curr = graph.entity(way.nodes[i]);
+                   if (source) {
+                     assigner(object, source, index, customizer);
+                   }
+                 }
 
-             if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
-               if (!isInteresting(prev, graph)) {
-                 way = way.removeNode(prev.id);
-                 graph = graph.replace(way).remove(prev);
-               } else if (!isInteresting(curr, graph)) {
-                 way = way.removeNode(curr.id);
-                 graph = graph.replace(way).remove(curr);
-               }
+                 return object;
+               });
              }
+             /**
+              * Creates a `baseEach` or `baseEachRight` function.
+              *
+              * @private
+              * @param {Function} eachFunc The function to iterate over a collection.
+              * @param {boolean} [fromRight] Specify iterating from right to left.
+              * @returns {Function} Returns the new base function.
+              */
 
-             prev = curr;
-           }
-
-           return graph;
-         } // Reorder nodes around intersections that have moved..
-         //
-         //  Start:                way1.nodes: b,e         (moving)
-         //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
-         //      |                 vertex: b
-         //      e                 isEP1: true,  isEP2, false
-         //
-         //  way1 `b,e` moved here:
-         //  a ----- c = b - d
-         //              |
-         //              e
-         //
-         //  reorder nodes         way1.nodes: b,e
-         //  a ----- c - b - d     way2.nodes: a,c,b,d
-         //              |
-         //              e
-         //
 
+             function createBaseEach(eachFunc, fromRight) {
+               return function (collection, iteratee) {
+                 if (collection == null) {
+                   return collection;
+                 }
 
-         function unZorroIntersection(intersection, graph) {
-           var vertex = graph.entity(intersection.nodeId);
-           var way1 = graph.entity(intersection.movedId);
-           var way2 = graph.entity(intersection.unmovedId);
-           var isEP1 = intersection.movedIsEP;
-           var isEP2 = intersection.unmovedIsEP; // don't move the vertex if it is the endpoint of both ways.
+                 if (!isArrayLike(collection)) {
+                   return eachFunc(collection, iteratee);
+                 }
 
-           if (isEP1 && isEP2) return graph;
-           var nodes1 = graph.childNodes(way1).filter(function (n) {
-             return n !== vertex;
-           });
-           var nodes2 = graph.childNodes(way2).filter(function (n) {
-             return n !== vertex;
-           });
-           if (way1.isClosed() && way1.first() === vertex.id) nodes1.push(nodes1[0]);
-           if (way2.isClosed() && way2.first() === vertex.id) nodes2.push(nodes2[0]);
-           var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
-           var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
-           var loc; // snap vertex to nearest edge (or some point between them)..
+                 var length = collection.length,
+                     index = fromRight ? length : -1,
+                     iterable = Object(collection);
 
-           if (!isEP1 && !isEP2) {
-             var epsilon = 1e-6,
-                 maxIter = 10;
+                 while (fromRight ? index-- : ++index < length) {
+                   if (iteratee(iterable[index], index, iterable) === false) {
+                     break;
+                   }
+                 }
 
-             for (var i = 0; i < maxIter; i++) {
-               loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
-               edge1 = geoChooseEdge(nodes1, projection(loc), projection);
-               edge2 = geoChooseEdge(nodes2, projection(loc), projection);
-               if (Math.abs(edge1.distance - edge2.distance) < epsilon) break;
+                 return collection;
+               };
              }
-           } else if (!isEP1) {
-             loc = edge1.loc;
-           } else {
-             loc = edge2.loc;
-           }
+             /**
+              * Creates a base function for methods like `_.forIn` and `_.forOwn`.
+              *
+              * @private
+              * @param {boolean} [fromRight] Specify iterating from right to left.
+              * @returns {Function} Returns the new base function.
+              */
 
-           graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..
 
-           if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
-             way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
-             graph = graph.replace(way1);
-           }
+             function createBaseFor(fromRight) {
+               return function (object, iteratee, keysFunc) {
+                 var index = -1,
+                     iterable = Object(object),
+                     props = keysFunc(object),
+                     length = props.length;
 
-           if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
-             way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
-             graph = graph.replace(way2);
-           }
+                 while (length--) {
+                   var key = props[fromRight ? length : ++index];
 
-           return graph;
-         }
+                   if (iteratee(iterable[key], key, iterable) === false) {
+                     break;
+                   }
+                 }
 
-         function cleanupIntersections(graph) {
-           for (var i = 0; i < cache.intersections.length; i++) {
-             var obj = cache.intersections[i];
-             graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
-             graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
-             graph = unZorroIntersection(obj, graph);
-             graph = removeDuplicateVertices(obj.movedId, graph);
-             graph = removeDuplicateVertices(obj.unmovedId, graph);
-           }
+                 return object;
+               };
+             }
+             /**
+              * Creates a function that wraps `func` to invoke it with the optional `this`
+              * binding of `thisArg`.
+              *
+              * @private
+              * @param {Function} func The function to wrap.
+              * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+              * @param {*} [thisArg] The `this` binding of `func`.
+              * @returns {Function} Returns the new wrapped function.
+              */
 
-           return graph;
-         } // check if moving way endpoint can cross an unmoved way, if so limit delta..
 
+             function createBind(func, bitmask, thisArg) {
+               var isBind = bitmask & WRAP_BIND_FLAG,
+                   Ctor = createCtor(func);
 
-         function limitDelta(graph) {
-           function moveNode(loc) {
-             return geoVecAdd(projection(loc), _delta);
-           }
+               function wrapper() {
+                 var fn = this && this !== root && this instanceof wrapper ? Ctor : func;
+                 return fn.apply(isBind ? thisArg : this, arguments);
+               }
 
-           for (var i = 0; i < cache.intersections.length; i++) {
-             var obj = cache.intersections[i]; // Don't limit movement if this is vertex joins 2 endpoints..
+               return wrapper;
+             }
+             /**
+              * Creates a function like `_.lowerFirst`.
+              *
+              * @private
+              * @param {string} methodName The name of the `String` case method to use.
+              * @returns {Function} Returns the new case function.
+              */
 
-             if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
 
-             if (!obj.movedIsEP) continue;
-             var node = graph.entity(obj.nodeId);
-             var start = projection(node.loc);
-             var end = geoVecAdd(start, _delta);
-             var movedNodes = graph.childNodes(graph.entity(obj.movedId));
-             var movedPath = movedNodes.map(function (n) {
-               return moveNode(n.loc);
-             });
-             var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
-             var unmovedPath = unmovedNodes.map(function (n) {
-               return projection(n.loc);
-             });
-             var hits = geoPathIntersections(movedPath, unmovedPath);
+             function createCaseFirst(methodName) {
+               return function (string) {
+                 string = toString(string);
+                 var strSymbols = hasUnicode(string) ? stringToArray(string) : undefined$1;
+                 var chr = strSymbols ? strSymbols[0] : string.charAt(0);
+                 var trailing = strSymbols ? castSlice(strSymbols, 1).join('') : string.slice(1);
+                 return chr[methodName]() + trailing;
+               };
+             }
+             /**
+              * Creates a function like `_.camelCase`.
+              *
+              * @private
+              * @param {Function} callback The function to combine each word.
+              * @returns {Function} Returns the new compounder function.
+              */
 
-             for (var j = 0; i < hits.length; i++) {
-               if (geoVecEqual(hits[j], end)) continue;
-               var edge = geoChooseEdge(unmovedNodes, end, projection);
-               _delta = geoVecSubtract(projection(edge.loc), start);
+
+             function createCompounder(callback) {
+               return function (string) {
+                 return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
+               };
              }
-           }
-         }
+             /**
+              * Creates a function that produces an instance of `Ctor` regardless of
+              * whether it was invoked as part of a `new` expression or by `call` or `apply`.
+              *
+              * @private
+              * @param {Function} Ctor The constructor to wrap.
+              * @returns {Function} Returns the new wrapped function.
+              */
 
-         var action = function action(graph) {
-           if (_delta[0] === 0 && _delta[1] === 0) return graph;
-           setupCache(graph);
 
-           if (cache.intersections.length) {
-             limitDelta(graph);
-           }
+             function createCtor(Ctor) {
+               return function () {
+                 // Use a `switch` statement to work with class constructors. See
+                 // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
+                 // for more details.
+                 var args = arguments;
 
-           for (var i = 0; i < cache.nodes.length; i++) {
-             var node = graph.entity(cache.nodes[i]);
-             var start = projection(node.loc);
-             var end = geoVecAdd(start, _delta);
-             graph = graph.replace(node.move(projection.invert(end)));
-           }
+                 switch (args.length) {
+                   case 0:
+                     return new Ctor();
 
-           if (cache.intersections.length) {
-             graph = cleanupIntersections(graph);
-           }
+                   case 1:
+                     return new Ctor(args[0]);
 
-           return graph;
-         };
+                   case 2:
+                     return new Ctor(args[0], args[1]);
 
-         action.delta = function () {
-           return _delta;
-         };
+                   case 3:
+                     return new Ctor(args[0], args[1], args[2]);
 
-         return action;
-       }
+                   case 4:
+                     return new Ctor(args[0], args[1], args[2], args[3]);
 
-       function actionMoveMember(relationId, fromIndex, toIndex) {
-         return function (graph) {
-           return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
-         };
-       }
+                   case 5:
+                     return new Ctor(args[0], args[1], args[2], args[3], args[4]);
 
-       function actionMoveNode(nodeID, toLoc) {
-         var action = function action(graph, t) {
-           if (t === null || !isFinite(t)) t = 1;
-           t = Math.min(Math.max(+t, 0), 1);
-           var node = graph.entity(nodeID);
-           return graph.replace(node.move(geoVecInterp(node.loc, toLoc, t)));
-         };
+                   case 6:
+                     return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
 
-         action.transitionable = true;
-         return action;
-       }
+                   case 7:
+                     return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
+                 }
 
-       function actionNoop() {
-         return function (graph) {
-           return graph;
-         };
-       }
+                 var thisBinding = baseCreate(Ctor.prototype),
+                     result = Ctor.apply(thisBinding, args); // Mimic the constructor's `return` behavior.
+                 // See https://es5.github.io/#x13.2.2 for more details.
 
-       function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
-         var epsilon = ep || 1e-4;
-         var threshold = degThresh || 13; // degrees within right or straight to alter
-         // We test normalized dot products so we can compare as cos(angle)
+                 return isObject(result) ? result : thisBinding;
+               };
+             }
+             /**
+              * Creates a function that wraps `func` to enable currying.
+              *
+              * @private
+              * @param {Function} func The function to wrap.
+              * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+              * @param {number} arity The arity of `func`.
+              * @returns {Function} Returns the new wrapped function.
+              */
 
-         var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
-         var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-         var action = function action(graph, t) {
-           if (t === null || !isFinite(t)) t = 1;
-           t = Math.min(Math.max(+t, 0), 1);
-           var way = graph.entity(wayID);
-           way = way.removeNode(''); // sanity check - remove any consecutive duplicates
+             function createCurry(func, bitmask, arity) {
+               var Ctor = createCtor(func);
 
-           if (way.tags.nonsquare) {
-             var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
+               function wrapper() {
+                 var length = arguments.length,
+                     args = Array(length),
+                     index = length,
+                     placeholder = getHolder(wrapper);
 
-             delete tags.nonsquare;
-             way = way.update({
-               tags: tags
-             });
-           }
+                 while (index--) {
+                   args[index] = arguments[index];
+                 }
 
-           graph = graph.replace(way);
-           var isClosed = way.isClosed();
-           var nodes = graph.childNodes(way).slice(); // shallow copy
+                 var holders = length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder ? [] : replaceHolders(args, placeholder);
+                 length -= holders.length;
 
-           if (isClosed) nodes.pop();
+                 if (length < arity) {
+                   return createRecurry(func, bitmask, createHybrid, wrapper.placeholder, undefined$1, args, holders, undefined$1, undefined$1, arity - length);
+                 }
 
-           if (vertexID !== undefined) {
-             nodes = nodeSubset(nodes, vertexID, isClosed);
-             if (nodes.length !== 3) return graph;
-           } // note: all geometry functions here use the unclosed node/point/coord list
+                 var fn = this && this !== root && this instanceof wrapper ? Ctor : func;
+                 return apply(fn, this, args);
+               }
 
+               return wrapper;
+             }
+             /**
+              * Creates a `_.find` or `_.findLast` function.
+              *
+              * @private
+              * @param {Function} findIndexFunc The function to find the collection index.
+              * @returns {Function} Returns the new find function.
+              */
 
-           var nodeCount = {};
-           var points = [];
-           var corner = {
-             i: 0,
-             dotp: 1
-           };
-           var node, point, loc, score, motions, i, j;
 
-           for (i = 0; i < nodes.length; i++) {
-             node = nodes[i];
-             nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
-             points.push({
-               id: node.id,
-               coord: projection(node.loc)
-             });
-           }
+             function createFind(findIndexFunc) {
+               return function (collection, predicate, fromIndex) {
+                 var iterable = Object(collection);
 
-           if (points.length === 3) {
-             // move only one vertex for right triangle
-             for (i = 0; i < 1000; i++) {
-               motions = points.map(calcMotion);
-               points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
-               score = corner.dotp;
+                 if (!isArrayLike(collection)) {
+                   var iteratee = getIteratee(predicate, 3);
+                   collection = keys(collection);
 
-               if (score < epsilon) {
-                 break;
-               }
+                   predicate = function predicate(key) {
+                     return iteratee(iterable[key], key, iterable);
+                   };
+                 }
+
+                 var index = findIndexFunc(collection, predicate, fromIndex);
+                 return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined$1;
+               };
              }
+             /**
+              * Creates a `_.flow` or `_.flowRight` function.
+              *
+              * @private
+              * @param {boolean} [fromRight] Specify iterating from right to left.
+              * @returns {Function} Returns the new flow function.
+              */
 
-             node = graph.entity(nodes[corner.i].id);
-             loc = projection.invert(points[corner.i].coord);
-             graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-           } else {
-             var straights = [];
-             var simplified = []; // Remove points from nearly straight sections..
-             // This produces a simplified shape to orthogonalize
 
-             for (i = 0; i < points.length; i++) {
-               point = points[i];
-               var dotp = 0;
+             function createFlow(fromRight) {
+               return flatRest(function (funcs) {
+                 var length = funcs.length,
+                     index = length,
+                     prereq = LodashWrapper.prototype.thru;
 
-               if (isClosed || i > 0 && i < points.length - 1) {
-                 var a = points[(i - 1 + points.length) % points.length];
-                 var b = points[(i + 1) % points.length];
-                 dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
-               }
+                 if (fromRight) {
+                   funcs.reverse();
+                 }
 
-               if (dotp > upperThreshold) {
-                 straights.push(point);
-               } else {
-                 simplified.push(point);
-               }
-             } // Orthogonalize the simplified shape
+                 while (index--) {
+                   var func = funcs[index];
 
+                   if (typeof func != 'function') {
+                     throw new TypeError(FUNC_ERROR_TEXT);
+                   }
 
-             var bestPoints = clonePoints(simplified);
-             var originalPoints = clonePoints(simplified);
-             score = Infinity;
+                   if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
+                     var wrapper = new LodashWrapper([], true);
+                   }
+                 }
 
-             for (i = 0; i < 1000; i++) {
-               motions = simplified.map(calcMotion);
+                 index = wrapper ? index : length;
 
-               for (j = 0; j < motions.length; j++) {
-                 simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
-               }
+                 while (++index < length) {
+                   func = funcs[index];
+                   var funcName = getFuncName(func),
+                       data = funcName == 'wrapper' ? getData(func) : undefined$1;
 
-               var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
+                   if (data && isLaziable(data[0]) && data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) && !data[4].length && data[9] == 1) {
+                     wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
+                   } else {
+                     wrapper = func.length == 1 && isLaziable(func) ? wrapper[funcName]() : wrapper.thru(func);
+                   }
+                 }
 
-               if (newScore < score) {
-                 bestPoints = clonePoints(simplified);
-                 score = newScore;
-               }
+                 return function () {
+                   var args = arguments,
+                       value = args[0];
 
-               if (score < epsilon) {
-                 break;
-               }
+                   if (wrapper && args.length == 1 && isArray(value)) {
+                     return wrapper.plant(value).value();
+                   }
+
+                   var index = 0,
+                       result = length ? funcs[index].apply(this, args) : value;
+
+                   while (++index < length) {
+                     result = funcs[index].call(this, result);
+                   }
+
+                   return result;
+                 };
+               });
              }
+             /**
+              * Creates a function that wraps `func` to invoke it with optional `this`
+              * binding of `thisArg`, partial application, and currying.
+              *
+              * @private
+              * @param {Function|string} func The function or method name to wrap.
+              * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+              * @param {*} [thisArg] The `this` binding of `func`.
+              * @param {Array} [partials] The arguments to prepend to those provided to
+              *  the new function.
+              * @param {Array} [holders] The `partials` placeholder indexes.
+              * @param {Array} [partialsRight] The arguments to append to those provided
+              *  to the new function.
+              * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
+              * @param {Array} [argPos] The argument positions of the new function.
+              * @param {number} [ary] The arity cap of `func`.
+              * @param {number} [arity] The arity of `func`.
+              * @returns {Function} Returns the new wrapped function.
+              */
 
-             var bestCoords = bestPoints.map(function (p) {
-               return p.coord;
-             });
-             if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
 
-             for (i = 0; i < bestPoints.length; i++) {
-               point = bestPoints[i];
+             function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
+               var isAry = bitmask & WRAP_ARY_FLAG,
+                   isBind = bitmask & WRAP_BIND_FLAG,
+                   isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
+                   isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
+                   isFlip = bitmask & WRAP_FLIP_FLAG,
+                   Ctor = isBindKey ? undefined$1 : createCtor(func);
 
-               if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
-                 node = graph.entity(point.id);
-                 loc = projection.invert(point.coord);
-                 graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
-               }
-             } // move the nodes along straight segments
+               function wrapper() {
+                 var length = arguments.length,
+                     args = Array(length),
+                     index = length;
 
+                 while (index--) {
+                   args[index] = arguments[index];
+                 }
 
-             for (i = 0; i < straights.length; i++) {
-               point = straights[i];
-               if (nodeCount[point.id] > 1) continue; // skip self-intersections
+                 if (isCurried) {
+                   var placeholder = getHolder(wrapper),
+                       holdersCount = countHolders(args, placeholder);
+                 }
 
-               node = graph.entity(point.id);
+                 if (partials) {
+                   args = composeArgs(args, partials, holders, isCurried);
+                 }
 
-               if (t === 1 && graph.parentWays(node).length === 1 && graph.parentRelations(node).length === 0 && !node.hasInterestingTags()) {
-                 // remove uninteresting points..
-                 graph = actionDeleteNode(node.id)(graph);
-               } else {
-                 // move interesting points to the nearest edge..
-                 var choice = geoVecProject(point.coord, bestCoords);
+                 if (partialsRight) {
+                   args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
+                 }
 
-                 if (choice) {
-                   loc = projection.invert(choice.target);
-                   graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+                 length -= holdersCount;
+
+                 if (isCurried && length < arity) {
+                   var newHolders = replaceHolders(args, placeholder);
+                   return createRecurry(func, bitmask, createHybrid, wrapper.placeholder, thisArg, args, newHolders, argPos, ary, arity - length);
+                 }
+
+                 var thisBinding = isBind ? thisArg : this,
+                     fn = isBindKey ? thisBinding[func] : func;
+                 length = args.length;
+
+                 if (argPos) {
+                   args = reorder(args, argPos);
+                 } else if (isFlip && length > 1) {
+                   args.reverse();
+                 }
+
+                 if (isAry && ary < length) {
+                   args.length = ary;
+                 }
+
+                 if (this && this !== root && this instanceof wrapper) {
+                   fn = Ctor || createCtor(fn);
                  }
+
+                 return fn.apply(thisBinding, args);
                }
+
+               return wrapper;
              }
-           }
+             /**
+              * Creates a function like `_.invertBy`.
+              *
+              * @private
+              * @param {Function} setter The function to set accumulator values.
+              * @param {Function} toIteratee The function to resolve iteratees.
+              * @returns {Function} Returns the new inverter function.
+              */
 
-           return graph;
 
-           function clonePoints(array) {
-             return array.map(function (p) {
-               return {
-                 id: p.id,
-                 coord: [p.coord[0], p.coord[1]]
+             function createInverter(setter, toIteratee) {
+               return function (object, iteratee) {
+                 return baseInverter(object, setter, toIteratee(iteratee), {});
                };
-             });
-           }
+             }
+             /**
+              * Creates a function that performs a mathematical operation on two values.
+              *
+              * @private
+              * @param {Function} operator The function to perform the operation.
+              * @param {number} [defaultValue] The value used for `undefined` arguments.
+              * @returns {Function} Returns the new mathematical operation function.
+              */
 
-           function calcMotion(point, i, array) {
-             // don't try to move the endpoints of a non-closed way.
-             if (!isClosed && (i === 0 || i === array.length - 1)) return [0, 0]; // don't try to move a node that appears more than once (self intersection)
 
-             if (nodeCount[array[i].id] > 1) return [0, 0];
-             var a = array[(i - 1 + array.length) % array.length].coord;
-             var origin = point.coord;
-             var b = array[(i + 1) % array.length].coord;
-             var p = geoVecSubtract(a, origin);
-             var q = geoVecSubtract(b, origin);
-             var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
-             p = geoVecNormalize(p);
-             q = geoVecNormalize(q);
-             var dotp = p[0] * q[0] + p[1] * q[1];
-             var val = Math.abs(dotp);
+             function createMathOperation(operator, defaultValue) {
+               return function (value, other) {
+                 var result;
 
-             if (val < lowerThreshold) {
-               // nearly orthogonal
-               corner.i = i;
-               corner.dotp = val;
-               var vec = geoVecNormalize(geoVecAdd(p, q));
-               return geoVecScale(vec, 0.1 * dotp * scale);
-             }
+                 if (value === undefined$1 && other === undefined$1) {
+                   return defaultValue;
+                 }
 
-             return [0, 0]; // do nothing
-           }
-         }; // if we are only orthogonalizing one vertex,
-         // get that vertex and the previous and next
+                 if (value !== undefined$1) {
+                   result = value;
+                 }
 
+                 if (other !== undefined$1) {
+                   if (result === undefined$1) {
+                     return other;
+                   }
 
-         function nodeSubset(nodes, vertexID, isClosed) {
-           var first = isClosed ? 0 : 1;
-           var last = isClosed ? nodes.length : nodes.length - 1;
+                   if (typeof value == 'string' || typeof other == 'string') {
+                     value = baseToString(value);
+                     other = baseToString(other);
+                   } else {
+                     value = baseToNumber(value);
+                     other = baseToNumber(other);
+                   }
 
-           for (var i = first; i < last; i++) {
-             if (nodes[i].id === vertexID) {
-               return [nodes[(i - 1 + nodes.length) % nodes.length], nodes[i], nodes[(i + 1) % nodes.length]];
+                   result = operator(value, other);
+                 }
+
+                 return result;
+               };
              }
-           }
+             /**
+              * Creates a function like `_.over`.
+              *
+              * @private
+              * @param {Function} arrayFunc The function to iterate over iteratees.
+              * @returns {Function} Returns the new over function.
+              */
 
-           return [];
-         }
 
-         action.disabled = function (graph) {
-           var way = graph.entity(wayID);
-           way = way.removeNode(''); // sanity check - remove any consecutive duplicates
+             function createOver(arrayFunc) {
+               return flatRest(function (iteratees) {
+                 iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
+                 return baseRest(function (args) {
+                   var thisArg = this;
+                   return arrayFunc(iteratees, function (iteratee) {
+                     return apply(iteratee, thisArg, args);
+                   });
+                 });
+               });
+             }
+             /**
+              * Creates the padding for `string` based on `length`. The `chars` string
+              * is truncated if the number of characters exceeds `length`.
+              *
+              * @private
+              * @param {number} length The padding length.
+              * @param {string} [chars=' '] The string used as padding.
+              * @returns {string} Returns the padding for `string`.
+              */
 
-           graph = graph.replace(way);
-           var isClosed = way.isClosed();
-           var nodes = graph.childNodes(way).slice(); // shallow copy
 
-           if (isClosed) nodes.pop();
-           var allowStraightAngles = false;
+             function createPadding(length, chars) {
+               chars = chars === undefined$1 ? ' ' : baseToString(chars);
+               var charsLength = chars.length;
 
-           if (vertexID !== undefined) {
-             allowStraightAngles = true;
-             nodes = nodeSubset(nodes, vertexID, isClosed);
-             if (nodes.length !== 3) return 'end_vertex';
-           }
+               if (charsLength < 2) {
+                 return charsLength ? baseRepeat(chars, length) : chars;
+               }
 
-           var coords = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
+               var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
+               return hasUnicode(chars) ? castSlice(stringToArray(result), 0, length).join('') : result.slice(0, length);
+             }
+             /**
+              * Creates a function that wraps `func` to invoke it with the `this` binding
+              * of `thisArg` and `partials` prepended to the arguments it receives.
+              *
+              * @private
+              * @param {Function} func The function to wrap.
+              * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+              * @param {*} thisArg The `this` binding of `func`.
+              * @param {Array} partials The arguments to prepend to those provided to
+              *  the new function.
+              * @returns {Function} Returns the new wrapped function.
+              */
 
-           if (score === null) {
-             return 'not_squarish';
-           } else if (score === 0) {
-             return 'square_enough';
-           } else {
-             return false;
-           }
-         };
 
-         action.transitionable = true;
-         return action;
-       }
+             function createPartial(func, bitmask, thisArg, partials) {
+               var isBind = bitmask & WRAP_BIND_FLAG,
+                   Ctor = createCtor(func);
 
-       //
-       // `turn` must be an `osmTurn` object
-       // see osm/intersection.js, pathToTurn()
-       //
-       // This specifies a restriction of type `restriction` when traveling from
-       // `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
-       // (The action does not check that these entities form a valid intersection.)
-       //
-       // From, to, and via ways should be split before calling this action.
-       // (old versions of the code would split the ways here, but we no longer do it)
-       //
-       // For testing convenience, accepts a restrictionID to assign to the new
-       // relation. Normally, this will be undefined and the relation will
-       // automatically be assigned a new ID.
-       //
+               function wrapper() {
+                 var argsIndex = -1,
+                     argsLength = arguments.length,
+                     leftIndex = -1,
+                     leftLength = partials.length,
+                     args = Array(leftLength + argsLength),
+                     fn = this && this !== root && this instanceof wrapper ? Ctor : func;
 
-       function actionRestrictTurn(turn, restrictionType, restrictionID) {
-         return function (graph) {
-           var fromWay = graph.entity(turn.from.way);
-           var toWay = graph.entity(turn.to.way);
-           var viaNode = turn.via.node && graph.entity(turn.via.node);
-           var viaWays = turn.via.ways && turn.via.ways.map(function (id) {
-             return graph.entity(id);
-           });
-           var members = [];
-           members.push({
-             id: fromWay.id,
-             type: 'way',
-             role: 'from'
-           });
+                 while (++leftIndex < leftLength) {
+                   args[leftIndex] = partials[leftIndex];
+                 }
 
-           if (viaNode) {
-             members.push({
-               id: viaNode.id,
-               type: 'node',
-               role: 'via'
-             });
-           } else if (viaWays) {
-             viaWays.forEach(function (viaWay) {
-               members.push({
-                 id: viaWay.id,
-                 type: 'way',
-                 role: 'via'
-               });
-             });
-           }
+                 while (argsLength--) {
+                   args[leftIndex++] = arguments[++argsIndex];
+                 }
 
-           members.push({
-             id: toWay.id,
-             type: 'way',
-             role: 'to'
-           });
-           return graph.replace(osmRelation({
-             id: restrictionID,
-             tags: {
-               type: 'restriction',
-               restriction: restrictionType
-             },
-             members: members
-           }));
-         };
-       }
+                 return apply(fn, isBind ? thisArg : this, args);
+               }
 
-       function actionRevert(id) {
-         var action = function action(graph) {
-           var entity = graph.hasEntity(id),
-               base = graph.base().entities[id];
+               return wrapper;
+             }
+             /**
+              * Creates a `_.range` or `_.rangeRight` function.
+              *
+              * @private
+              * @param {boolean} [fromRight] Specify iterating from right to left.
+              * @returns {Function} Returns the new range function.
+              */
 
-           if (entity && !base) {
-             // entity will be removed..
-             if (entity.type === 'node') {
-               graph.parentWays(entity).forEach(function (parent) {
-                 parent = parent.removeNode(id);
-                 graph = graph.replace(parent);
 
-                 if (parent.isDegenerate()) {
-                   graph = actionDeleteWay(parent.id)(graph);
-                 }
-               });
-             }
+             function createRange(fromRight) {
+               return function (start, end, step) {
+                 if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
+                   end = step = undefined$1;
+                 } // Ensure the sign of `-0` is preserved.
 
-             graph.parentRelations(entity).forEach(function (parent) {
-               parent = parent.removeMembersWithID(id);
-               graph = graph.replace(parent);
 
-               if (parent.isDegenerate()) {
-                 graph = actionDeleteRelation(parent.id)(graph);
-               }
-             });
-           }
+                 start = toFinite(start);
 
-           return graph.revert(id);
-         };
+                 if (end === undefined$1) {
+                   end = start;
+                   start = 0;
+                 } else {
+                   end = toFinite(end);
+                 }
 
-         return action;
-       }
+                 step = step === undefined$1 ? start < end ? 1 : -1 : toFinite(step);
+                 return baseRange(start, end, step, fromRight);
+               };
+             }
+             /**
+              * Creates a function that performs a relational operation on two values.
+              *
+              * @private
+              * @param {Function} operator The function to perform the operation.
+              * @returns {Function} Returns the new relational operation function.
+              */
 
-       function actionRotate(rotateIds, pivot, angle, projection) {
-         var action = function action(graph) {
-           return graph.update(function (graph) {
-             utilGetAllNodes(rotateIds, graph).forEach(function (node) {
-               var point = geoRotate([projection(node.loc)], angle, pivot)[0];
-               graph = graph.replace(node.move(projection.invert(point)));
-             });
-           });
-         };
 
-         return action;
-       }
+             function createRelationalOperation(operator) {
+               return function (value, other) {
+                 if (!(typeof value == 'string' && typeof other == 'string')) {
+                   value = toNumber(value);
+                   other = toNumber(other);
+                 }
 
-       function actionScale(ids, pivotLoc, scaleFactor, projection) {
-         return function (graph) {
-           return graph.update(function (graph) {
-             var point, radial;
-             utilGetAllNodes(ids, graph).forEach(function (node) {
-               point = projection(node.loc);
-               radial = [point[0] - pivotLoc[0], point[1] - pivotLoc[1]];
-               point = [pivotLoc[0] + scaleFactor * radial[0], pivotLoc[1] + scaleFactor * radial[1]];
-               graph = graph.replace(node.move(projection.invert(point)));
-             });
-           });
-         };
-       }
+                 return operator(value, other);
+               };
+             }
+             /**
+              * Creates a function that wraps `func` to continue currying.
+              *
+              * @private
+              * @param {Function} func The function to wrap.
+              * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+              * @param {Function} wrapFunc The function to create the `func` wrapper.
+              * @param {*} placeholder The placeholder value.
+              * @param {*} [thisArg] The `this` binding of `func`.
+              * @param {Array} [partials] The arguments to prepend to those provided to
+              *  the new function.
+              * @param {Array} [holders] The `partials` placeholder indexes.
+              * @param {Array} [argPos] The argument positions of the new function.
+              * @param {number} [ary] The arity cap of `func`.
+              * @param {number} [arity] The arity of `func`.
+              * @returns {Function} Returns the new wrapped function.
+              */
 
-       /* Align nodes along their common axis */
 
-       function actionStraightenNodes(nodeIDs, projection) {
-         function positionAlongWay(a, o, b) {
-           return geoVecDot(a, b, o) / geoVecDot(b, b, o);
-         } // returns the endpoints of the long axis of symmetry of the `points` bounding rect
+             function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
+               var isCurry = bitmask & WRAP_CURRY_FLAG,
+                   newHolders = isCurry ? holders : undefined$1,
+                   newHoldersRight = isCurry ? undefined$1 : holders,
+                   newPartials = isCurry ? partials : undefined$1,
+                   newPartialsRight = isCurry ? undefined$1 : partials;
+               bitmask |= isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG;
+               bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
 
+               if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
+                 bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
+               }
 
-         function getEndpoints(points) {
-           var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
-           // The shape's surrounding rectangle has 2 axes of symmetry.
-           // Snap points to the long axis
+               var newData = [func, bitmask, thisArg, newPartials, newHolders, newPartialsRight, newHoldersRight, argPos, ary, arity];
+               var result = wrapFunc.apply(undefined$1, newData);
 
-           var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
-           var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
-           var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
-           var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
-           var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+               if (isLaziable(func)) {
+                 setData(result, newData);
+               }
 
-           if (isLong) {
-             return [p1, q1];
-           }
+               result.placeholder = placeholder;
+               return setWrapToString(result, func, bitmask);
+             }
+             /**
+              * Creates a function like `_.round`.
+              *
+              * @private
+              * @param {string} methodName The name of the `Math` method to use when rounding.
+              * @returns {Function} Returns the new round function.
+              */
 
-           return [p2, q2];
-         }
 
-         var action = function action(graph, t) {
-           if (t === null || !isFinite(t)) t = 1;
-           t = Math.min(Math.max(+t, 0), 1);
-           var nodes = nodeIDs.map(function (id) {
-             return graph.entity(id);
-           });
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var endpoints = getEndpoints(points);
-           var startPoint = endpoints[0];
-           var endPoint = endpoints[1]; // Move points onto the line connecting the endpoints
+             function createRound(methodName) {
+               var func = Math[methodName];
+               return function (number, precision) {
+                 number = toNumber(number);
+                 precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
 
-           for (var i = 0; i < points.length; i++) {
-             var node = nodes[i];
-             var point = points[i];
-             var u = positionAlongWay(point, startPoint, endPoint);
-             var point2 = geoVecInterp(startPoint, endPoint, u);
-             var loc2 = projection.invert(point2);
-             graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
-           }
+                 if (precision && nativeIsFinite(number)) {
+                   // Shift with exponential notation to avoid floating-point issues.
+                   // See [MDN](https://mdn.io/round#Examples) for more details.
+                   var pair = (toString(number) + 'e').split('e'),
+                       value = func(pair[0] + 'e' + (+pair[1] + precision));
+                   pair = (toString(value) + 'e').split('e');
+                   return +(pair[0] + 'e' + (+pair[1] - precision));
+                 }
 
-           return graph;
-         };
+                 return func(number);
+               };
+             }
+             /**
+              * Creates a set object of `values`.
+              *
+              * @private
+              * @param {Array} values The values to add to the set.
+              * @returns {Object} Returns the new set.
+              */
 
-         action.disabled = function (graph) {
-           var nodes = nodeIDs.map(function (id) {
-             return graph.entity(id);
-           });
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var endpoints = getEndpoints(points);
-           var startPoint = endpoints[0];
-           var endPoint = endpoints[1];
-           var maxDistance = 0;
 
-           for (var i = 0; i < points.length; i++) {
-             var point = points[i];
-             var u = positionAlongWay(point, startPoint, endPoint);
-             var p = geoVecInterp(startPoint, endPoint, u);
-             var dist = geoVecLength(p, point);
+             var createSet = !(Set && 1 / setToArray(new Set([, -0]))[1] == INFINITY) ? noop : function (values) {
+               return new Set(values);
+             };
+             /**
+              * Creates a `_.toPairs` or `_.toPairsIn` function.
+              *
+              * @private
+              * @param {Function} keysFunc The function to get the keys of a given object.
+              * @returns {Function} Returns the new pairs function.
+              */
+
+             function createToPairs(keysFunc) {
+               return function (object) {
+                 var tag = getTag(object);
 
-             if (!isNaN(dist) && dist > maxDistance) {
-               maxDistance = dist;
+                 if (tag == mapTag) {
+                   return mapToArray(object);
+                 }
+
+                 if (tag == setTag) {
+                   return setToPairs(object);
+                 }
+
+                 return baseToPairs(object, keysFunc(object));
+               };
              }
-           }
+             /**
+              * Creates a function that either curries or invokes `func` with optional
+              * `this` binding and partially applied arguments.
+              *
+              * @private
+              * @param {Function|string} func The function or method name to wrap.
+              * @param {number} bitmask The bitmask flags.
+              *    1 - `_.bind`
+              *    2 - `_.bindKey`
+              *    4 - `_.curry` or `_.curryRight` of a bound function
+              *    8 - `_.curry`
+              *   16 - `_.curryRight`
+              *   32 - `_.partial`
+              *   64 - `_.partialRight`
+              *  128 - `_.rearg`
+              *  256 - `_.ary`
+              *  512 - `_.flip`
+              * @param {*} [thisArg] The `this` binding of `func`.
+              * @param {Array} [partials] The arguments to be partially applied.
+              * @param {Array} [holders] The `partials` placeholder indexes.
+              * @param {Array} [argPos] The argument positions of the new function.
+              * @param {number} [ary] The arity cap of `func`.
+              * @param {number} [arity] The arity of `func`.
+              * @returns {Function} Returns the new wrapped function.
+              */
 
-           if (maxDistance < 0.0001) {
-             return 'straight_enough';
-           }
-         };
 
-         action.transitionable = true;
-         return action;
-       }
+             function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
+               var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
 
-       /*
-        * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
-        */
+               if (!isBindKey && typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-       function actionStraightenWay(selectedIDs, projection) {
-         function positionAlongWay(a, o, b) {
-           return geoVecDot(a, b, o) / geoVecDot(b, b, o);
-         } // Return all selected ways as a continuous, ordered array of nodes
+               var length = partials ? partials.length : 0;
 
+               if (!length) {
+                 bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
+                 partials = holders = undefined$1;
+               }
 
-         function allNodes(graph) {
-           var nodes = [];
-           var startNodes = [];
-           var endNodes = [];
-           var remainingWays = [];
-           var selectedWays = selectedIDs.filter(function (w) {
-             return graph.entity(w).type === 'way';
-           });
-           var selectedNodes = selectedIDs.filter(function (n) {
-             return graph.entity(n).type === 'node';
-           });
+               ary = ary === undefined$1 ? ary : nativeMax(toInteger(ary), 0);
+               arity = arity === undefined$1 ? arity : toInteger(arity);
+               length -= holders ? holders.length : 0;
 
-           for (var i = 0; i < selectedWays.length; i++) {
-             var way = graph.entity(selectedWays[i]);
-             nodes = way.nodes.slice(0);
-             remainingWays.push(nodes);
-             startNodes.push(nodes[0]);
-             endNodes.push(nodes[nodes.length - 1]);
-           } // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
-           //   and need to be removed so currNode difference calculation below works)
-           // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
+               if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
+                 var partialsRight = partials,
+                     holdersRight = holders;
+                 partials = holders = undefined$1;
+               }
 
+               var data = isBindKey ? undefined$1 : getData(func);
+               var newData = [func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity];
 
-           startNodes = startNodes.filter(function (n) {
-             return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
-           });
-           endNodes = endNodes.filter(function (n) {
-             return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
-           }); // Choose the initial endpoint to start from
+               if (data) {
+                 mergeData(newData, data);
+               }
 
-           var currNode = utilArrayDifference(startNodes, endNodes).concat(utilArrayDifference(endNodes, startNodes))[0];
-           var nextWay = [];
-           nodes = []; // Create nested function outside of loop to avoid "function in loop" lint error
+               func = newData[0];
+               bitmask = newData[1];
+               thisArg = newData[2];
+               partials = newData[3];
+               holders = newData[4];
+               arity = newData[9] = newData[9] === undefined$1 ? isBindKey ? 0 : func.length : nativeMax(newData[9] - length, 0);
 
-           var getNextWay = function getNextWay(currNode, remainingWays) {
-             return remainingWays.filter(function (way) {
-               return way[0] === currNode || way[way.length - 1] === currNode;
-             })[0];
-           }; // Add nodes to end of nodes array, until all ways are added
+               if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
+                 bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
+               }
 
+               if (!bitmask || bitmask == WRAP_BIND_FLAG) {
+                 var result = createBind(func, bitmask, thisArg);
+               } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
+                 result = createCurry(func, bitmask, arity);
+               } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
+                 result = createPartial(func, bitmask, thisArg, partials);
+               } else {
+                 result = createHybrid.apply(undefined$1, newData);
+               }
 
-           while (remainingWays.length) {
-             nextWay = getNextWay(currNode, remainingWays);
-             remainingWays = utilArrayDifference(remainingWays, [nextWay]);
+               var setter = data ? baseSetData : setData;
+               return setWrapToString(setter(result, newData), func, bitmask);
+             }
+             /**
+              * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
+              * of source objects to the destination object for all destination properties
+              * that resolve to `undefined`.
+              *
+              * @private
+              * @param {*} objValue The destination value.
+              * @param {*} srcValue The source value.
+              * @param {string} key The key of the property to assign.
+              * @param {Object} object The parent object of `objValue`.
+              * @returns {*} Returns the value to assign.
+              */
 
-             if (nextWay[0] !== currNode) {
-               nextWay.reverse();
+
+             function customDefaultsAssignIn(objValue, srcValue, key, object) {
+               if (objValue === undefined$1 || eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key)) {
+                 return srcValue;
+               }
+
+               return objValue;
              }
+             /**
+              * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
+              * objects into destination objects that are passed thru.
+              *
+              * @private
+              * @param {*} objValue The destination value.
+              * @param {*} srcValue The source value.
+              * @param {string} key The key of the property to merge.
+              * @param {Object} object The parent object of `objValue`.
+              * @param {Object} source The parent object of `srcValue`.
+              * @param {Object} [stack] Tracks traversed source values and their merged
+              *  counterparts.
+              * @returns {*} Returns the value to assign.
+              */
 
-             nodes = nodes.concat(nextWay);
-             currNode = nodes[nodes.length - 1];
-           } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
 
+             function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
+               if (isObject(objValue) && isObject(srcValue)) {
+                 // Recursively merge objects and arrays (susceptible to call stack limits).
+                 stack.set(srcValue, objValue);
+                 baseMerge(objValue, srcValue, undefined$1, customDefaultsMerge, stack);
+                 stack['delete'](srcValue);
+               }
 
-           if (selectedNodes.length === 2) {
-             var startNodeIdx = nodes.indexOf(selectedNodes[0]);
-             var endNodeIdx = nodes.indexOf(selectedNodes[1]);
-             var sortedStartEnd = [startNodeIdx, endNodeIdx];
-             sortedStartEnd.sort(function (a, b) {
-               return a - b;
-             });
-             nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1] + 1);
-           }
+               return objValue;
+             }
+             /**
+              * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
+              * objects.
+              *
+              * @private
+              * @param {*} value The value to inspect.
+              * @param {string} key The key of the property to inspect.
+              * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
+              */
 
-           return nodes.map(function (n) {
-             return graph.entity(n);
-           });
-         }
 
-         function shouldKeepNode(node, graph) {
-           return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
-         }
+             function customOmitClone(value) {
+               return isPlainObject(value) ? undefined$1 : value;
+             }
+             /**
+              * A specialized version of `baseIsEqualDeep` for arrays with support for
+              * partial deep comparisons.
+              *
+              * @private
+              * @param {Array} array The array to compare.
+              * @param {Array} other The other array to compare.
+              * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+              * @param {Function} customizer The function to customize comparisons.
+              * @param {Function} equalFunc The function to determine equivalents of values.
+              * @param {Object} stack Tracks traversed `array` and `other` objects.
+              * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
+              */
 
-         var action = function action(graph, t) {
-           if (t === null || !isFinite(t)) t = 1;
-           t = Math.min(Math.max(+t, 0), 1);
-           var nodes = allNodes(graph);
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var startPoint = points[0];
-           var endPoint = points[points.length - 1];
-           var toDelete = [];
-           var i;
 
-           for (i = 1; i < points.length - 1; i++) {
-             var node = nodes[i];
-             var point = points[i];
+             function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
+               var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+                   arrLength = array.length,
+                   othLength = other.length;
 
-             if (t < 1 || shouldKeepNode(node, graph)) {
-               var u = positionAlongWay(point, startPoint, endPoint);
-               var p = geoVecInterp(startPoint, endPoint, u);
-               var loc2 = projection.invert(p);
-               graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
-             } else {
-               // safe to delete
-               if (toDelete.indexOf(node) === -1) {
-                 toDelete.push(node);
+               if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
+                 return false;
+               } // Check that cyclic values are equal.
+
+
+               var arrStacked = stack.get(array);
+               var othStacked = stack.get(other);
+
+               if (arrStacked && othStacked) {
+                 return arrStacked == other && othStacked == array;
                }
-             }
-           }
 
-           for (i = 0; i < toDelete.length; i++) {
-             graph = actionDeleteNode(toDelete[i].id)(graph);
-           }
+               var index = -1,
+                   result = true,
+                   seen = bitmask & COMPARE_UNORDERED_FLAG ? new SetCache() : undefined$1;
+               stack.set(array, other);
+               stack.set(other, array); // Ignore non-index properties.
 
-           return graph;
-         };
+               while (++index < arrLength) {
+                 var arrValue = array[index],
+                     othValue = other[index];
 
-         action.disabled = function (graph) {
-           // check way isn't too bendy
-           var nodes = allNodes(graph);
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var startPoint = points[0];
-           var endPoint = points[points.length - 1];
-           var threshold = 0.2 * geoVecLength(startPoint, endPoint);
-           var i;
+                 if (customizer) {
+                   var compared = isPartial ? customizer(othValue, arrValue, index, other, array, stack) : customizer(arrValue, othValue, index, array, other, stack);
+                 }
 
-           if (threshold === 0) {
-             return 'too_bendy';
-           }
+                 if (compared !== undefined$1) {
+                   if (compared) {
+                     continue;
+                   }
 
-           var maxDistance = 0;
+                   result = false;
+                   break;
+                 } // Recursively compare arrays (susceptible to call stack limits).
 
-           for (i = 1; i < points.length - 1; i++) {
-             var point = points[i];
-             var u = positionAlongWay(point, startPoint, endPoint);
-             var p = geoVecInterp(startPoint, endPoint, u);
-             var dist = geoVecLength(p, point); // to bendy if point is off by 20% of total start/end distance in projected space
 
-             if (isNaN(dist) || dist > threshold) {
-               return 'too_bendy';
-             } else if (dist > maxDistance) {
-               maxDistance = dist;
+                 if (seen) {
+                   if (!arraySome(other, function (othValue, othIndex) {
+                     if (!cacheHas(seen, othIndex) && (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
+                       return seen.push(othIndex);
+                     }
+                   })) {
+                     result = false;
+                     break;
+                   }
+                 } else if (!(arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
+                   result = false;
+                   break;
+                 }
+               }
+
+               stack['delete'](array);
+               stack['delete'](other);
+               return result;
              }
-           }
+             /**
+              * A specialized version of `baseIsEqualDeep` for comparing objects of
+              * the same `toStringTag`.
+              *
+              * **Note:** This function only supports comparing values with tags of
+              * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
+              *
+              * @private
+              * @param {Object} object The object to compare.
+              * @param {Object} other The other object to compare.
+              * @param {string} tag The `toStringTag` of the objects to compare.
+              * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+              * @param {Function} customizer The function to customize comparisons.
+              * @param {Function} equalFunc The function to determine equivalents of values.
+              * @param {Object} stack Tracks traversed `object` and `other` objects.
+              * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+              */
 
-           var keepingAllNodes = nodes.every(function (node, i) {
-             return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
-           });
 
-           if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
-           keepingAllNodes) {
-             return 'straight_enough';
-           }
-         };
+             function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
+               switch (tag) {
+                 case dataViewTag:
+                   if (object.byteLength != other.byteLength || object.byteOffset != other.byteOffset) {
+                     return false;
+                   }
 
-         action.transitionable = true;
-         return action;
-       }
+                   object = object.buffer;
+                   other = other.buffer;
 
-       //
-       // `turn` must be an `osmTurn` object with a `restrictionID` property.
-       // see osm/intersection.js, pathToTurn()
-       //
+                 case arrayBufferTag:
+                   if (object.byteLength != other.byteLength || !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
+                     return false;
+                   }
 
-       function actionUnrestrictTurn(turn) {
-         return function (graph) {
-           return actionDeleteRelation(turn.restrictionID)(graph);
-         };
-       }
+                   return true;
 
-       /* Reflect the given area around its axis of symmetry */
+                 case boolTag:
+                 case dateTag:
+                 case numberTag:
+                   // Coerce booleans to `1` or `0` and dates to milliseconds.
+                   // Invalid dates are coerced to `NaN`.
+                   return eq(+object, +other);
 
-       function actionReflect(reflectIds, projection) {
-         var _useLongAxis = true;
+                 case errorTag:
+                   return object.name == other.name && object.message == other.message;
 
-         var action = function action(graph, t) {
-           if (t === null || !isFinite(t)) t = 1;
-           t = Math.min(Math.max(+t, 0), 1);
-           var nodes = utilGetAllNodes(reflectIds, graph);
-           var points = nodes.map(function (n) {
-             return projection(n.loc);
-           });
-           var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
-           // The shape's surrounding rectangle has 2 axes of symmetry.
-           // Reflect across the longer axis by default.
+                 case regexpTag:
+                 case stringTag:
+                   // Coerce regexes to strings and treat strings, primitives and objects,
+                   // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
+                   // for more details.
+                   return object == other + '';
 
-           var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
-           var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
-           var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
-           var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
-           var p, q;
-           var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+                 case mapTag:
+                   var convert = mapToArray;
 
-           if (_useLongAxis && isLong || !_useLongAxis && !isLong) {
-             p = p1;
-             q = q1;
-           } else {
-             p = p2;
-             q = q2;
-           } // reflect c across pq
-           // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line
+                 case setTag:
+                   var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
+                   convert || (convert = setToArray);
 
+                   if (object.size != other.size && !isPartial) {
+                     return false;
+                   } // Assume cyclic values are equal.
 
-           var dx = q[0] - p[0];
-           var dy = q[1] - p[1];
-           var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
-           var b = 2 * dx * dy / (dx * dx + dy * dy);
 
-           for (var i = 0; i < nodes.length; i++) {
-             var node = nodes[i];
-             var c = projection(node.loc);
-             var c2 = [a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0], b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]];
-             var loc2 = projection.invert(c2);
-             node = node.move(geoVecInterp(node.loc, loc2, t));
-             graph = graph.replace(node);
-           }
+                   var stacked = stack.get(object);
 
-           return graph;
-         };
+                   if (stacked) {
+                     return stacked == other;
+                   }
 
-         action.useLongAxis = function (val) {
-           if (!arguments.length) return _useLongAxis;
-           _useLongAxis = val;
-           return action;
-         };
+                   bitmask |= COMPARE_UNORDERED_FLAG; // Recursively compare objects (susceptible to call stack limits).
 
-         action.transitionable = true;
-         return action;
-       }
+                   stack.set(object, other);
+                   var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
+                   stack['delete'](object);
+                   return result;
 
-       function actionUpgradeTags(entityId, oldTags, replaceTags) {
-         return function (graph) {
-           var entity = graph.entity(entityId);
-           var tags = Object.assign({}, entity.tags); // shallow copy
+                 case symbolTag:
+                   if (symbolValueOf) {
+                     return symbolValueOf.call(object) == symbolValueOf.call(other);
+                   }
 
-           var transferValue;
-           var semiIndex;
+               }
 
-           for (var oldTagKey in oldTags) {
-             if (!(oldTagKey in tags)) continue; // wildcard match
+               return false;
+             }
+             /**
+              * A specialized version of `baseIsEqualDeep` for objects with support for
+              * partial deep comparisons.
+              *
+              * @private
+              * @param {Object} object The object to compare.
+              * @param {Object} other The other object to compare.
+              * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
+              * @param {Function} customizer The function to customize comparisons.
+              * @param {Function} equalFunc The function to determine equivalents of values.
+              * @param {Object} stack Tracks traversed `object` and `other` objects.
+              * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
+              */
 
-             if (oldTags[oldTagKey] === '*') {
-               // note the value since we might need to transfer it
-               transferValue = tags[oldTagKey];
-               delete tags[oldTagKey]; // exact match
-             } else if (oldTags[oldTagKey] === tags[oldTagKey]) {
-               delete tags[oldTagKey]; // match is within semicolon-delimited values
-             } else {
-               var vals = tags[oldTagKey].split(';').filter(Boolean);
-               var oldIndex = vals.indexOf(oldTags[oldTagKey]);
 
-               if (vals.length === 1 || oldIndex === -1) {
-                 delete tags[oldTagKey];
-               } else {
-                 if (replaceTags && replaceTags[oldTagKey]) {
-                   // replacing a value within a semicolon-delimited value, note the index
-                   semiIndex = oldIndex;
-                 }
+             function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
+               var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
+                   objProps = getAllKeys(object),
+                   objLength = objProps.length,
+                   othProps = getAllKeys(other),
+                   othLength = othProps.length;
 
-                 vals.splice(oldIndex, 1);
-                 tags[oldTagKey] = vals.join(';');
+               if (objLength != othLength && !isPartial) {
+                 return false;
                }
-             }
-           }
 
-           if (replaceTags) {
-             for (var replaceKey in replaceTags) {
-               var replaceValue = replaceTags[replaceKey];
+               var index = objLength;
 
-               if (replaceValue === '*') {
-                 if (tags[replaceKey] && tags[replaceKey] !== 'no') {
-                   // allow any pre-existing value except `no` (troll tag)
-                   continue;
-                 } else {
-                   // otherwise assume `yes` is okay
-                   tags[replaceKey] = 'yes';
-                 }
-               } else if (replaceValue === '$1') {
-                 tags[replaceKey] = transferValue;
-               } else {
-                 if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
-                   // don't override preexisting values
-                   var existingVals = tags[replaceKey].split(';').filter(Boolean);
+               while (index--) {
+                 var key = objProps[index];
 
-                   if (existingVals.indexOf(replaceValue) === -1) {
-                     existingVals.splice(semiIndex, 0, replaceValue);
-                     tags[replaceKey] = existingVals.join(';');
-                   }
-                 } else {
-                   tags[replaceKey] = replaceValue;
+                 if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
+                   return false;
                  }
-               }
-             }
-           }
+               } // Check that cyclic values are equal.
 
-           return graph.replace(entity.update({
-             tags: tags
-           }));
-         };
-       }
 
-       function behaviorEdit(context) {
-         function behavior() {
-           context.map().minzoom(context.minEditableZoom());
-         }
+               var objStacked = stack.get(object);
+               var othStacked = stack.get(other);
 
-         behavior.off = function () {
-           context.map().minzoom(0);
-         };
+               if (objStacked && othStacked) {
+                 return objStacked == other && othStacked == object;
+               }
 
-         return behavior;
-       }
+               var result = true;
+               stack.set(object, other);
+               stack.set(other, object);
+               var skipCtor = isPartial;
 
-       /*
-          The hover behavior adds the `.hover` class on pointerover to all elements to which
-          the identical datum is bound, and removes it on pointerout.
+               while (++index < objLength) {
+                 key = objProps[index];
+                 var objValue = object[key],
+                     othValue = other[key];
 
-          The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
-          representation may consist of several elements scattered throughout the DOM hierarchy.
-          Only one of these elements can have the :hover pseudo-class, but all of them will
-          have the .hover class.
-        */
+                 if (customizer) {
+                   var compared = isPartial ? customizer(othValue, objValue, key, other, object, stack) : customizer(objValue, othValue, key, object, other, stack);
+                 } // Recursively compare objects (susceptible to call stack limits).
 
-       function behaviorHover(context) {
-         var dispatch$1 = dispatch('hover');
 
-         var _selection = select(null);
+                 if (!(compared === undefined$1 ? objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack) : compared)) {
+                   result = false;
+                   break;
+                 }
 
-         var _newNodeId = null;
-         var _initialNodeID = null;
+                 skipCtor || (skipCtor = key == 'constructor');
+               }
 
-         var _altDisables;
+               if (result && !skipCtor) {
+                 var objCtor = object.constructor,
+                     othCtor = other.constructor; // Non `Object` object instances with different constructors are not equal.
 
-         var _ignoreVertex;
+                 if (objCtor != othCtor && 'constructor' in object && 'constructor' in other && !(typeof objCtor == 'function' && objCtor instanceof objCtor && typeof othCtor == 'function' && othCtor instanceof othCtor)) {
+                   result = false;
+                 }
+               }
 
-         var _targets = []; // use pointer events on supported platforms; fallback to mouse events
+               stack['delete'](object);
+               stack['delete'](other);
+               return result;
+             }
+             /**
+              * A specialized version of `baseRest` which flattens the rest array.
+              *
+              * @private
+              * @param {Function} func The function to apply a rest parameter to.
+              * @returns {Function} Returns the new function.
+              */
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-         function keydown(d3_event) {
-           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
+             function flatRest(func) {
+               return setToString(overRest(func, undefined$1, flatten), func + '');
+             }
+             /**
+              * Creates an array of own enumerable property names and symbols of `object`.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of property names and symbols.
+              */
 
-             _selection.classed('hover-disabled', true);
 
-             dispatch$1.call('hover', this, null);
-           }
-         }
+             function getAllKeys(object) {
+               return baseGetAllKeys(object, keys, getSymbols);
+             }
+             /**
+              * Creates an array of own and inherited enumerable property names and
+              * symbols of `object`.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of property names and symbols.
+              */
 
-         function keyup(d3_event) {
-           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
 
-             _selection.classed('hover-disabled', false);
+             function getAllKeysIn(object) {
+               return baseGetAllKeys(object, keysIn, getSymbolsIn);
+             }
+             /**
+              * Gets metadata for `func`.
+              *
+              * @private
+              * @param {Function} func The function to query.
+              * @returns {*} Returns the metadata for `func`.
+              */
 
-             dispatch$1.call('hover', this, _targets);
-           }
-         }
 
-         function behavior(selection) {
-           _selection = selection;
-           _targets = [];
+             var getData = !metaMap ? noop : function (func) {
+               return metaMap.get(func);
+             };
+             /**
+              * Gets the name of `func`.
+              *
+              * @private
+              * @param {Function} func The function to query.
+              * @returns {string} Returns the function name.
+              */
 
-           if (_initialNodeID) {
-             _newNodeId = _initialNodeID;
-             _initialNodeID = null;
-           } else {
-             _newNodeId = null;
-           }
+             function getFuncName(func) {
+               var result = func.name + '',
+                   array = realNames[result],
+                   length = hasOwnProperty.call(realNames, result) ? array.length : 0;
 
-           _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
-           .on(_pointerPrefix + 'down.hover', pointerover);
+               while (length--) {
+                 var data = array[length],
+                     otherFunc = data.func;
 
-           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
+                 if (otherFunc == null || otherFunc == func) {
+                   return data.name;
+                 }
+               }
 
-           function eventTarget(d3_event) {
-             var datum = d3_event.target && d3_event.target.__data__;
-             if (_typeof(datum) !== 'object') return null;
+               return result;
+             }
+             /**
+              * Gets the argument placeholder value for `func`.
+              *
+              * @private
+              * @param {Function} func The function to inspect.
+              * @returns {*} Returns the placeholder value.
+              */
 
-             if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
-               return datum.properties.entity;
+
+             function getHolder(func) {
+               var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
+               return object.placeholder;
              }
+             /**
+              * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
+              * this function returns the custom method, otherwise it returns `baseIteratee`.
+              * If arguments are provided, the chosen function is invoked with them and
+              * its result is returned.
+              *
+              * @private
+              * @param {*} [value] The value to convert to an iteratee.
+              * @param {number} [arity] The arity of the created iteratee.
+              * @returns {Function} Returns the chosen function or its result.
+              */
 
-             return datum;
-           }
 
-           function pointerover(d3_event) {
-             // ignore mouse hovers with buttons pressed unless dragging
-             if (context.mode().id.indexOf('drag') === -1 && (!d3_event.pointerType || d3_event.pointerType === 'mouse') && d3_event.buttons) return;
-             var target = eventTarget(d3_event);
+             function getIteratee() {
+               var result = lodash.iteratee || iteratee;
+               result = result === iteratee ? baseIteratee : result;
+               return arguments.length ? result(arguments[0], arguments[1]) : result;
+             }
+             /**
+              * Gets the data for `map`.
+              *
+              * @private
+              * @param {Object} map The map to query.
+              * @param {string} key The reference key.
+              * @returns {*} Returns the map data.
+              */
 
-             if (target && _targets.indexOf(target) === -1) {
-               _targets.push(target);
 
-               updateHover(d3_event, _targets);
+             function getMapData(map, key) {
+               var data = map.__data__;
+               return isKeyable(key) ? data[typeof key == 'string' ? 'string' : 'hash'] : data.map;
              }
-           }
+             /**
+              * Gets the property names, values, and compare flags of `object`.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the match data of `object`.
+              */
 
-           function pointerout(d3_event) {
-             var target = eventTarget(d3_event);
 
-             var index = _targets.indexOf(target);
+             function getMatchData(object) {
+               var result = keys(object),
+                   length = result.length;
 
-             if (index !== -1) {
-               _targets.splice(index);
+               while (length--) {
+                 var key = result[length],
+                     value = object[key];
+                 result[length] = [key, value, isStrictComparable(value)];
+               }
 
-               updateHover(d3_event, _targets);
+               return result;
              }
-           }
-
-           function allowsVertex(d) {
-             return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-           }
+             /**
+              * Gets the native function at `key` of `object`.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @param {string} key The key of the method to get.
+              * @returns {*} Returns the function if it's native, else `undefined`.
+              */
 
-           function modeAllowsHover(target) {
-             var mode = context.mode();
 
-             if (mode.id === 'add-point') {
-               return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+             function getNative(object, key) {
+               var value = getValue(object, key);
+               return baseIsNative(value) ? value : undefined$1;
              }
+             /**
+              * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
+              *
+              * @private
+              * @param {*} value The value to query.
+              * @returns {string} Returns the raw `toStringTag`.
+              */
 
-             return true;
-           }
 
-           function updateHover(d3_event, targets) {
-             _selection.selectAll('.hover').classed('hover', false);
+             function getRawTag(value) {
+               var isOwn = hasOwnProperty.call(value, symToStringTag),
+                   tag = value[symToStringTag];
 
-             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+               try {
+                 value[symToStringTag] = undefined$1;
+                 var unmasked = true;
+               } catch (e) {}
 
-             var mode = context.mode();
+               var result = nativeObjectToString.call(value);
 
-             if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
-               var node = targets.find(function (target) {
-                 return target instanceof osmEntity && target.type === 'node';
-               });
-               _newNodeId = node && node.id;
+               if (unmasked) {
+                 if (isOwn) {
+                   value[symToStringTag] = tag;
+                 } else {
+                   delete value[symToStringTag];
+                 }
+               }
+
+               return result;
              }
+             /**
+              * Creates an array of the own enumerable symbols of `object`.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of symbols.
+              */
 
-             targets = targets.filter(function (datum) {
-               if (datum instanceof osmEntity) {
-                 // If drawing a way, don't hover on a node that was just placed. #3974
-                 return datum.id !== _newNodeId && (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) && modeAllowsHover(datum);
+
+             var getSymbols = !nativeGetSymbols ? stubArray : function (object) {
+               if (object == null) {
+                 return [];
                }
 
-               return true;
-             });
-             var selector = '';
+               object = Object(object);
+               return arrayFilter(nativeGetSymbols(object), function (symbol) {
+                 return propertyIsEnumerable.call(object, symbol);
+               });
+             };
+             /**
+              * Creates an array of the own and inherited enumerable symbols of `object`.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of symbols.
+              */
 
-             for (var i in targets) {
-               var datum = targets[i]; // What are we hovering over?
+             var getSymbolsIn = !nativeGetSymbols ? stubArray : function (object) {
+               var result = [];
 
-               if (datum.__featurehash__) {
-                 // hovering custom data
-                 selector += ', .data' + datum.__featurehash__;
-               } else if (datum instanceof QAItem) {
-                 selector += ', .' + datum.service + '.itemId-' + datum.id;
-               } else if (datum instanceof osmNote) {
-                 selector += ', .note-' + datum.id;
-               } else if (datum instanceof osmEntity) {
-                 selector += ', .' + datum.id;
+               while (object) {
+                 arrayPush(result, getSymbols(object));
+                 object = getPrototype(object);
+               }
+
+               return result;
+             };
+             /**
+              * Gets the `toStringTag` of `value`.
+              *
+              * @private
+              * @param {*} value The value to query.
+              * @returns {string} Returns the `toStringTag`.
+              */
+
+             var getTag = baseGetTag; // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
+
+             if (DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag || Map && getTag(new Map()) != mapTag || Promise && getTag(Promise.resolve()) != promiseTag || Set && getTag(new Set()) != setTag || WeakMap && getTag(new WeakMap()) != weakMapTag) {
+               getTag = function getTag(value) {
+                 var result = baseGetTag(value),
+                     Ctor = result == objectTag ? value.constructor : undefined$1,
+                     ctorString = Ctor ? toSource(Ctor) : '';
+
+                 if (ctorString) {
+                   switch (ctorString) {
+                     case dataViewCtorString:
+                       return dataViewTag;
 
-                 if (datum.type === 'relation') {
-                   for (var j in datum.members) {
-                     selector += ', .' + datum.members[j].id;
+                     case mapCtorString:
+                       return mapTag;
+
+                     case promiseCtorString:
+                       return promiseTag;
+
+                     case setCtorString:
+                       return setTag;
+
+                     case weakMapCtorString:
+                       return weakMapTag;
                    }
                  }
-               }
-             }
 
-             var suppressed = _altDisables && d3_event && d3_event.altKey;
+                 return result;
+               };
+             }
+             /**
+              * Gets the view, applying any `transforms` to the `start` and `end` positions.
+              *
+              * @private
+              * @param {number} start The start of the view.
+              * @param {number} end The end of the view.
+              * @param {Array} transforms The transformations to apply to the view.
+              * @returns {Object} Returns an object containing the `start` and `end`
+              *  positions of the view.
+              */
 
-             if (selector.trim().length) {
-               // remove the first comma
-               selector = selector.slice(1);
 
-               _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
-             }
+             function getView(start, end, transforms) {
+               var index = -1,
+                   length = transforms.length;
 
-             dispatch$1.call('hover', this, !suppressed && targets);
-           }
-         }
+               while (++index < length) {
+                 var data = transforms[index],
+                     size = data.size;
 
-         behavior.off = function (selection) {
-           selection.selectAll('.hover').classed('hover', false);
-           selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
-           selection.classed('hover-disabled', false);
-           selection.on(_pointerPrefix + 'over.hover', null).on(_pointerPrefix + 'out.hover', null).on(_pointerPrefix + 'down.hover', null);
-           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', null, true).on('keydown.hover', null).on('keyup.hover', null);
-         };
+                 switch (data.type) {
+                   case 'drop':
+                     start += size;
+                     break;
 
-         behavior.altDisables = function (val) {
-           if (!arguments.length) return _altDisables;
-           _altDisables = val;
-           return behavior;
-         };
+                   case 'dropRight':
+                     end -= size;
+                     break;
 
-         behavior.ignoreVertex = function (val) {
-           if (!arguments.length) return _ignoreVertex;
-           _ignoreVertex = val;
-           return behavior;
-         };
+                   case 'take':
+                     end = nativeMin(end, start + size);
+                     break;
 
-         behavior.initialNodeID = function (nodeId) {
-           _initialNodeID = nodeId;
-           return behavior;
-         };
+                   case 'takeRight':
+                     start = nativeMax(start, end - size);
+                     break;
+                 }
+               }
 
-         return utilRebind(behavior, dispatch$1, 'on');
-       }
+               return {
+                 'start': start,
+                 'end': end
+               };
+             }
+             /**
+              * Extracts wrapper details from the `source` body comment.
+              *
+              * @private
+              * @param {string} source The source to inspect.
+              * @returns {Array} Returns the wrapper details.
+              */
 
-       var _disableSpace = false;
-       var _lastSpace = null;
-       function behaviorDraw(context) {
-         var dispatch$1 = dispatch('move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish');
-         var keybinding = utilKeybinding('draw');
 
-         var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
+             function getWrapDetails(source) {
+               var match = source.match(reWrapDetails);
+               return match ? match[1].split(reSplitDetails) : [];
+             }
+             /**
+              * Checks if `path` exists on `object`.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @param {Array|string} path The path to check.
+              * @param {Function} hasFunc The function to check properties.
+              * @returns {boolean} Returns `true` if `path` exists, else `false`.
+              */
 
-         var _edit = behaviorEdit(context);
 
-         var _closeTolerance = 4;
-         var _tolerance = 12;
-         var _mouseLeave = false;
-         var _lastMouse = null;
+             function hasPath(object, path, hasFunc) {
+               path = castPath(path, object);
+               var index = -1,
+                   length = path.length,
+                   result = false;
 
-         var _lastPointerUpEvent;
+               while (++index < length) {
+                 var key = toKey(path[index]);
 
-         var _downPointer; // use pointer events on supported platforms; fallback to mouse events
+                 if (!(result = object != null && hasFunc(object, key))) {
+                   break;
+                 }
 
+                 object = object[key];
+               }
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
-         // - `mode/drag_node.js` `datum()`
+               if (result || ++index != length) {
+                 return result;
+               }
 
+               length = object == null ? 0 : object.length;
+               return !!length && isLength(length) && isIndex(key, length) && (isArray(object) || isArguments(object));
+             }
+             /**
+              * Initializes an array clone.
+              *
+              * @private
+              * @param {Array} array The array to clone.
+              * @returns {Array} Returns the initialized clone.
+              */
 
-         function datum(d3_event) {
-           var mode = context.mode();
-           var isNote = mode && mode.id.indexOf('note') !== -1;
-           if (d3_event.altKey || isNote) return {};
-           var element;
 
-           if (d3_event.type === 'keydown') {
-             element = _lastMouse && _lastMouse.target;
-           } else {
-             element = d3_event.target;
-           } // When drawing, snap only to touch targets..
-           // (this excludes area fills and active drawing elements)
+             function initCloneArray(array) {
+               var length = array.length,
+                   result = new array.constructor(length); // Add properties assigned by `RegExp#exec`.
 
+               if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
+                 result.index = array.index;
+                 result.input = array.input;
+               }
 
-           var d = element.__data__;
-           return d && d.properties && d.properties.target ? d : {};
-         }
+               return result;
+             }
+             /**
+              * Initializes an object clone.
+              *
+              * @private
+              * @param {Object} object The object to clone.
+              * @returns {Object} Returns the initialized clone.
+              */
 
-         function pointerdown(d3_event) {
-           if (_downPointer) return;
-           var pointerLocGetter = utilFastMouse(this);
-           _downPointer = {
-             id: d3_event.pointerId || 'mouse',
-             pointerLocGetter: pointerLocGetter,
-             downTime: +new Date(),
-             downLoc: pointerLocGetter(d3_event)
-           };
-           dispatch$1.call('down', this, d3_event, datum(d3_event));
-         }
 
-         function pointerup(d3_event) {
-           if (!_downPointer || _downPointer.id !== (d3_event.pointerId || 'mouse')) return;
-           var downPointer = _downPointer;
-           _downPointer = null;
-           _lastPointerUpEvent = d3_event;
-           if (downPointer.isCancelled) return;
-           var t2 = +new Date();
-           var p2 = downPointer.pointerLocGetter(d3_event);
-           var dist = geoVecLength(downPointer.downLoc, p2);
+             function initCloneObject(object) {
+               return typeof object.constructor == 'function' && !isPrototype(object) ? baseCreate(getPrototype(object)) : {};
+             }
+             /**
+              * Initializes an object clone based on its `toStringTag`.
+              *
+              * **Note:** This function only supports cloning values with tags of
+              * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
+              *
+              * @private
+              * @param {Object} object The object to clone.
+              * @param {string} tag The `toStringTag` of the object to clone.
+              * @param {boolean} [isDeep] Specify a deep clone.
+              * @returns {Object} Returns the initialized clone.
+              */
 
-           if (dist < _closeTolerance || dist < _tolerance && t2 - downPointer.downTime < 500) {
-             // Prevent a quick second click
-             select(window).on('click.draw-block', function () {
-               d3_event.stopPropagation();
-             }, true);
-             context.map().dblclickZoomEnable(false);
-             window.setTimeout(function () {
-               context.map().dblclickZoomEnable(true);
-               select(window).on('click.draw-block', null);
-             }, 500);
-             click(d3_event, p2);
-           }
-         }
 
-         function pointermove(d3_event) {
-           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
-             var p2 = _downPointer.pointerLocGetter(d3_event);
+             function initCloneByTag(object, tag, isDeep) {
+               var Ctor = object.constructor;
 
-             var dist = geoVecLength(_downPointer.downLoc, p2);
+               switch (tag) {
+                 case arrayBufferTag:
+                   return cloneArrayBuffer(object);
 
-             if (dist >= _closeTolerance) {
-               _downPointer.isCancelled = true;
-               dispatch$1.call('downcancel', this);
-             }
-           }
+                 case boolTag:
+                 case dateTag:
+                   return new Ctor(+object);
 
-           if (d3_event.pointerType && d3_event.pointerType !== 'mouse' || d3_event.buttons || _downPointer) return; // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
-           // events immediately after non-mouse pointerup events; detect and ignore them.
+                 case dataViewTag:
+                   return cloneDataView(object, isDeep);
 
-           if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
-           _lastMouse = d3_event;
-           dispatch$1.call('move', this, d3_event, datum(d3_event));
-         }
+                 case float32Tag:
+                 case float64Tag:
+                 case int8Tag:
+                 case int16Tag:
+                 case int32Tag:
+                 case uint8Tag:
+                 case uint8ClampedTag:
+                 case uint16Tag:
+                 case uint32Tag:
+                   return cloneTypedArray(object, isDeep);
 
-         function pointercancel(d3_event) {
-           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
-             if (!_downPointer.isCancelled) {
-               dispatch$1.call('downcancel', this);
-             }
+                 case mapTag:
+                   return new Ctor();
 
-             _downPointer = null;
-           }
-         }
+                 case numberTag:
+                 case stringTag:
+                   return new Ctor(object);
 
-         function mouseenter() {
-           _mouseLeave = false;
-         }
+                 case regexpTag:
+                   return cloneRegExp(object);
 
-         function mouseleave() {
-           _mouseLeave = true;
-         }
+                 case setTag:
+                   return new Ctor();
 
-         function allowsVertex(d) {
-           return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-         } // related code
-         // - `mode/drag_node.js`     `doMove()`
-         // - `behavior/draw.js`      `click()`
-         // - `behavior/draw_way.js`  `move()`
+                 case symbolTag:
+                   return cloneSymbol(object);
+               }
+             }
+             /**
+              * Inserts wrapper `details` in a comment at the top of the `source` body.
+              *
+              * @private
+              * @param {string} source The source to modify.
+              * @returns {Array} details The details to insert.
+              * @returns {string} Returns the modified source.
+              */
 
 
-         function click(d3_event, loc) {
-           var d = datum(d3_event);
-           var target = d && d.properties && d.properties.entity;
-           var mode = context.mode();
+             function insertWrapDetails(source, details) {
+               var length = details.length;
 
-           if (target && target.type === 'node' && allowsVertex(target)) {
-             // Snap to a node
-             dispatch$1.call('clickNode', this, target, d);
-             return;
-           } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {
-             // Snap to a way
-             var choice = geoChooseEdge(context.graph().childNodes(target), loc, context.projection, context.activeID());
+               if (!length) {
+                 return source;
+               }
 
-             if (choice) {
-               var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
-               dispatch$1.call('clickWay', this, choice.loc, edge, d);
-               return;
+               var lastIndex = length - 1;
+               details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
+               details = details.join(length > 2 ? ', ' : ' ');
+               return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
              }
-           } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
-             var locLatLng = context.projection.invert(loc);
-             dispatch$1.call('click', this, locLatLng, d);
-           }
-         } // treat a spacebar press like a click
+             /**
+              * Checks if `value` is a flattenable `arguments` object or array.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
+              */
 
 
-         function space(d3_event) {
-           d3_event.preventDefault();
-           d3_event.stopPropagation();
-           var currSpace = context.map().mouse();
+             function isFlattenable(value) {
+               return isArray(value) || isArguments(value) || !!(spreadableSymbol && value && value[spreadableSymbol]);
+             }
+             /**
+              * Checks if `value` is a valid array-like index.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
+              * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
+              */
 
-           if (_disableSpace && _lastSpace) {
-             var dist = geoVecLength(_lastSpace, currSpace);
 
-             if (dist > _tolerance) {
-               _disableSpace = false;
+             function isIndex(value, length) {
+               var type = _typeof(value);
+
+               length = length == null ? MAX_SAFE_INTEGER : length;
+               return !!length && (type == 'number' || type != 'symbol' && reIsUint.test(value)) && value > -1 && value % 1 == 0 && value < length;
              }
-           }
+             /**
+              * Checks if the given arguments are from an iteratee call.
+              *
+              * @private
+              * @param {*} value The potential iteratee value argument.
+              * @param {*} index The potential iteratee index or key argument.
+              * @param {*} object The potential iteratee object argument.
+              * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
+              *  else `false`.
+              */
 
-           if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
 
-           _lastSpace = currSpace;
-           _disableSpace = true;
-           select(window).on('keyup.space-block', function () {
-             d3_event.preventDefault();
-             d3_event.stopPropagation();
-             _disableSpace = false;
-             select(window).on('keyup.space-block', null);
-           }); // get the current mouse position
+             function isIterateeCall(value, index, object) {
+               if (!isObject(object)) {
+                 return false;
+               }
 
-           var loc = context.map().mouse() || // or the map center if the mouse has never entered the map
-           context.projection(context.map().center());
-           click(d3_event, loc);
-         }
+               var type = _typeof(index);
 
-         function backspace(d3_event) {
-           d3_event.preventDefault();
-           dispatch$1.call('undo');
-         }
+               if (type == 'number' ? isArrayLike(object) && isIndex(index, object.length) : type == 'string' && index in object) {
+                 return eq(object[index], value);
+               }
 
-         function del(d3_event) {
-           d3_event.preventDefault();
-           dispatch$1.call('cancel');
-         }
+               return false;
+             }
+             /**
+              * Checks if `value` is a property name and not a property path.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @param {Object} [object] The object to query keys on.
+              * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
+              */
 
-         function ret(d3_event) {
-           d3_event.preventDefault();
-           dispatch$1.call('finish');
-         }
 
-         function behavior(selection) {
-           context.install(_hover);
-           context.install(_edit);
-           _downPointer = null;
-           keybinding.on('⌫', backspace).on('⌦', del).on('⎋', ret).on('↩', ret).on('space', space).on('⌥space', space);
-           selection.on('mouseenter.draw', mouseenter).on('mouseleave.draw', mouseleave).on(_pointerPrefix + 'down.draw', pointerdown).on(_pointerPrefix + 'move.draw', pointermove);
-           select(window).on(_pointerPrefix + 'up.draw', pointerup, true).on('pointercancel.draw', pointercancel, true);
-           select(document).call(keybinding);
-           return behavior;
-         }
+             function isKey(value, object) {
+               if (isArray(value)) {
+                 return false;
+               }
 
-         behavior.off = function (selection) {
-           context.ui().sidebar.hover.cancel();
-           context.uninstall(_hover);
-           context.uninstall(_edit);
-           selection.on('mouseenter.draw', null).on('mouseleave.draw', null).on(_pointerPrefix + 'down.draw', null).on(_pointerPrefix + 'move.draw', null);
-           select(window).on(_pointerPrefix + 'up.draw', null).on('pointercancel.draw', null); // note: keyup.space-block, click.draw-block should remain
+               var type = _typeof(value);
 
-           select(document).call(keybinding.unbind);
-         };
+               if (type == 'number' || type == 'symbol' || type == 'boolean' || value == null || isSymbol(value)) {
+                 return true;
+               }
 
-         behavior.hover = function () {
-           return _hover;
-         };
+               return reIsPlainProp.test(value) || !reIsDeepProp.test(value) || object != null && value in Object(object);
+             }
+             /**
+              * Checks if `value` is suitable for use as unique object key.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
+              */
 
-         return utilRebind(behavior, dispatch$1, 'on');
-       }
 
-       function initRange(domain, range) {
-         switch (arguments.length) {
-           case 0:
-             break;
+             function isKeyable(value) {
+               var type = _typeof(value);
 
-           case 1:
-             this.range(domain);
-             break;
+               return type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean' ? value !== '__proto__' : value === null;
+             }
+             /**
+              * Checks if `func` has a lazy counterpart.
+              *
+              * @private
+              * @param {Function} func The function to check.
+              * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
+              *  else `false`.
+              */
 
-           default:
-             this.range(range).domain(domain);
-             break;
-         }
 
-         return this;
-       }
+             function isLaziable(func) {
+               var funcName = getFuncName(func),
+                   other = lodash[funcName];
 
-       function constants(x) {
-         return function () {
-           return x;
-         };
-       }
+               if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
+                 return false;
+               }
 
-       function number$1(x) {
-         return +x;
-       }
+               if (func === other) {
+                 return true;
+               }
 
-       var unit = [0, 1];
-       function identity$3(x) {
-         return x;
-       }
+               var data = getData(other);
+               return !!data && func === data[0];
+             }
+             /**
+              * Checks if `func` has its source masked.
+              *
+              * @private
+              * @param {Function} func The function to check.
+              * @returns {boolean} Returns `true` if `func` is masked, else `false`.
+              */
 
-       function normalize$1(a, b) {
-         return (b -= a = +a) ? function (x) {
-           return (x - a) / b;
-         } : constants(isNaN(b) ? NaN : 0.5);
-       }
 
-       function clamper(a, b) {
-         var t;
-         if (a > b) t = a, a = b, b = t;
-         return function (x) {
-           return Math.max(a, Math.min(b, x));
-         };
-       } // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
-       // interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
+             function isMasked(func) {
+               return !!maskSrcKey && maskSrcKey in func;
+             }
+             /**
+              * Checks if `func` is capable of being masked.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
+              */
 
 
-       function bimap(domain, range, interpolate) {
-         var d0 = domain[0],
-             d1 = domain[1],
-             r0 = range[0],
-             r1 = range[1];
-         if (d1 < d0) d0 = normalize$1(d1, d0), r0 = interpolate(r1, r0);else d0 = normalize$1(d0, d1), r0 = interpolate(r0, r1);
-         return function (x) {
-           return r0(d0(x));
-         };
-       }
+             var isMaskable = coreJsData ? isFunction : stubFalse;
+             /**
+              * Checks if `value` is likely a prototype object.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
+              */
 
-       function polymap(domain, range, interpolate) {
-         var j = Math.min(domain.length, range.length) - 1,
-             d = new Array(j),
-             r = new Array(j),
-             i = -1; // Reverse descending domains.
+             function isPrototype(value) {
+               var Ctor = value && value.constructor,
+                   proto = typeof Ctor == 'function' && Ctor.prototype || objectProto;
+               return value === proto;
+             }
+             /**
+              * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
+              *
+              * @private
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` if suitable for strict
+              *  equality comparisons, else `false`.
+              */
 
-         if (domain[j] < domain[0]) {
-           domain = domain.slice().reverse();
-           range = range.slice().reverse();
-         }
 
-         while (++i < j) {
-           d[i] = normalize$1(domain[i], domain[i + 1]);
-           r[i] = interpolate(range[i], range[i + 1]);
-         }
+             function isStrictComparable(value) {
+               return value === value && !isObject(value);
+             }
+             /**
+              * A specialized version of `matchesProperty` for source values suitable
+              * for strict equality comparisons, i.e. `===`.
+              *
+              * @private
+              * @param {string} key The key of the property to get.
+              * @param {*} srcValue The value to match.
+              * @returns {Function} Returns the new spec function.
+              */
 
-         return function (x) {
-           var i = bisectRight(domain, x, 1, j) - 1;
-           return r[i](d[i](x));
-         };
-       }
 
-       function copy(source, target) {
-         return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp()).unknown(source.unknown());
-       }
-       function transformer$1() {
-         var domain = unit,
-             range = unit,
-             interpolate$1 = interpolate,
-             transform,
-             untransform,
-             unknown,
-             clamp = identity$3,
-             piecewise,
-             output,
-             input;
+             function matchesStrictComparable(key, srcValue) {
+               return function (object) {
+                 if (object == null) {
+                   return false;
+                 }
 
-         function rescale() {
-           var n = Math.min(domain.length, range.length);
-           if (clamp !== identity$3) clamp = clamper(domain[0], domain[n - 1]);
-           piecewise = n > 2 ? polymap : bimap;
-           output = input = null;
-           return scale;
-         }
+                 return object[key] === srcValue && (srcValue !== undefined$1 || key in Object(object));
+               };
+             }
+             /**
+              * A specialized version of `_.memoize` which clears the memoized function's
+              * cache when it exceeds `MAX_MEMOIZE_SIZE`.
+              *
+              * @private
+              * @param {Function} func The function to have its output memoized.
+              * @returns {Function} Returns the new memoized function.
+              */
 
-         function scale(x) {
-           return isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate$1)))(transform(clamp(x)));
-         }
 
-         scale.invert = function (y) {
-           return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
-         };
+             function memoizeCapped(func) {
+               var result = memoize(func, function (key) {
+                 if (cache.size === MAX_MEMOIZE_SIZE) {
+                   cache.clear();
+                 }
 
-         scale.domain = function (_) {
-           return arguments.length ? (domain = Array.from(_, number$1), rescale()) : domain.slice();
-         };
+                 return key;
+               });
+               var cache = result.cache;
+               return result;
+             }
+             /**
+              * Merges the function metadata of `source` into `data`.
+              *
+              * Merging metadata reduces the number of wrappers used to invoke a function.
+              * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
+              * may be applied regardless of execution order. Methods like `_.ary` and
+              * `_.rearg` modify function arguments, making the order in which they are
+              * executed important, preventing the merging of metadata. However, we make
+              * an exception for a safe combined case where curried functions have `_.ary`
+              * and or `_.rearg` applied.
+              *
+              * @private
+              * @param {Array} data The destination metadata.
+              * @param {Array} source The source metadata.
+              * @returns {Array} Returns `data`.
+              */
 
-         scale.range = function (_) {
-           return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
-         };
 
-         scale.rangeRound = function (_) {
-           return range = Array.from(_), interpolate$1 = interpolateRound, rescale();
-         };
+             function mergeData(data, source) {
+               var bitmask = data[1],
+                   srcBitmask = source[1],
+                   newBitmask = bitmask | srcBitmask,
+                   isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);
+               var isCombo = srcBitmask == WRAP_ARY_FLAG && bitmask == WRAP_CURRY_FLAG || srcBitmask == WRAP_ARY_FLAG && bitmask == WRAP_REARG_FLAG && data[7].length <= source[8] || srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG) && source[7].length <= source[8] && bitmask == WRAP_CURRY_FLAG; // Exit early if metadata can't be merged.
 
-         scale.clamp = function (_) {
-           return arguments.length ? (clamp = _ ? true : identity$3, rescale()) : clamp !== identity$3;
-         };
+               if (!(isCommon || isCombo)) {
+                 return data;
+               } // Use source `thisArg` if available.
 
-         scale.interpolate = function (_) {
-           return arguments.length ? (interpolate$1 = _, rescale()) : interpolate$1;
-         };
 
-         scale.unknown = function (_) {
-           return arguments.length ? (unknown = _, scale) : unknown;
-         };
+               if (srcBitmask & WRAP_BIND_FLAG) {
+                 data[2] = source[2]; // Set when currying a bound function.
 
-         return function (t, u) {
-           transform = t, untransform = u;
-           return rescale();
-         };
-       }
-       function continuous() {
-         return transformer$1()(identity$3, identity$3);
-       }
+                 newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
+               } // Compose partial arguments.
 
-       function formatDecimal (x) {
-         return Math.abs(x = Math.round(x)) >= 1e21 ? x.toLocaleString("en").replace(/,/g, "") : x.toString(10);
-       } // Computes the decimal coefficient and exponent of the specified number x with
-       // significant digits p, where x is positive and p is in [1, 21] or undefined.
-       // For example, formatDecimalParts(1.23) returns ["123", 0].
 
-       function formatDecimalParts(x, p) {
-         if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
+               var value = source[3];
 
-         var i,
-             coefficient = x.slice(0, i); // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
-         // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
+               if (value) {
+                 var partials = data[3];
+                 data[3] = partials ? composeArgs(partials, value, source[4]) : value;
+                 data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
+               } // Compose partial right arguments.
 
-         return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
-       }
 
-       function exponent (x) {
-         return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
-       }
+               value = source[5];
 
-       function formatGroup (grouping, thousands) {
-         return function (value, width) {
-           var i = value.length,
-               t = [],
-               j = 0,
-               g = grouping[0],
-               length = 0;
+               if (value) {
+                 partials = data[5];
+                 data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
+                 data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
+               } // Use source `argPos` if available.
 
-           while (i > 0 && g > 0) {
-             if (length + g + 1 > width) g = Math.max(1, width - length);
-             t.push(value.substring(i -= g, i + g));
-             if ((length += g + 1) > width) break;
-             g = grouping[j = (j + 1) % grouping.length];
-           }
 
-           return t.reverse().join(thousands);
-         };
-       }
+               value = source[7];
 
-       function formatNumerals (numerals) {
-         return function (value) {
-           return value.replace(/[0-9]/g, function (i) {
-             return numerals[+i];
-           });
-         };
-       }
+               if (value) {
+                 data[7] = value;
+               } // Use source `ary` if it's smaller.
 
-       // [[fill]align][sign][symbol][0][width][,][.precision][~][type]
-       var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
-       function formatSpecifier(specifier) {
-         if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
-         var match;
-         return new FormatSpecifier({
-           fill: match[1],
-           align: match[2],
-           sign: match[3],
-           symbol: match[4],
-           zero: match[5],
-           width: match[6],
-           comma: match[7],
-           precision: match[8] && match[8].slice(1),
-           trim: match[9],
-           type: match[10]
-         });
-       }
-       formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
 
-       function FormatSpecifier(specifier) {
-         this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
-         this.align = specifier.align === undefined ? ">" : specifier.align + "";
-         this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
-         this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
-         this.zero = !!specifier.zero;
-         this.width = specifier.width === undefined ? undefined : +specifier.width;
-         this.comma = !!specifier.comma;
-         this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
-         this.trim = !!specifier.trim;
-         this.type = specifier.type === undefined ? "" : specifier.type + "";
-       }
+               if (srcBitmask & WRAP_ARY_FLAG) {
+                 data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
+               } // Use source `arity` if one is not provided.
 
-       FormatSpecifier.prototype.toString = function () {
-         return this.fill + this.align + this.sign + this.symbol + (this.zero ? "0" : "") + (this.width === undefined ? "" : Math.max(1, this.width | 0)) + (this.comma ? "," : "") + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0)) + (this.trim ? "~" : "") + this.type;
-       };
 
-       // Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
-       function formatTrim (s) {
-         out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
-           switch (s[i]) {
-             case ".":
-               i0 = i1 = i;
-               break;
+               if (data[9] == null) {
+                 data[9] = source[9];
+               } // Use source `func` and merge bitmasks.
+
+
+               data[0] = source[0];
+               data[1] = newBitmask;
+               return data;
+             }
+             /**
+              * This function is like
+              * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+              * except that it includes inherited enumerable properties.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of property names.
+              */
 
-             case "0":
-               if (i0 === 0) i0 = i;
-               i1 = i;
-               break;
 
-             default:
-               if (!+s[i]) break out;
-               if (i0 > 0) i0 = 0;
-               break;
-           }
-         }
+             function nativeKeysIn(object) {
+               var result = [];
 
-         return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
-       }
+               if (object != null) {
+                 for (var key in Object(object)) {
+                   result.push(key);
+                 }
+               }
 
-       // `thisNumberValue` abstract operation
-       // https://tc39.github.io/ecma262/#sec-thisnumbervalue
-       var thisNumberValue = function (value) {
-         if (typeof value != 'number' && classofRaw(value) != 'Number') {
-           throw TypeError('Incorrect invocation');
-         }
-         return +value;
-       };
+               return result;
+             }
+             /**
+              * Converts `value` to a string using `Object.prototype.toString`.
+              *
+              * @private
+              * @param {*} value The value to convert.
+              * @returns {string} Returns the converted string.
+              */
 
-       // `String.prototype.repeat` method implementation
-       // https://tc39.github.io/ecma262/#sec-string.prototype.repeat
-       var stringRepeat = ''.repeat || function repeat(count) {
-         var str = String(requireObjectCoercible(this));
-         var result = '';
-         var n = toInteger(count);
-         if (n < 0 || n == Infinity) throw RangeError('Wrong number of repetitions');
-         for (;n > 0; (n >>>= 1) && (str += str)) if (n & 1) result += str;
-         return result;
-       };
 
-       var nativeToFixed = 1.0.toFixed;
-       var floor$6 = Math.floor;
+             function objectToString(value) {
+               return nativeObjectToString.call(value);
+             }
+             /**
+              * A specialized version of `baseRest` which transforms the rest array.
+              *
+              * @private
+              * @param {Function} func The function to apply a rest parameter to.
+              * @param {number} [start=func.length-1] The start position of the rest parameter.
+              * @param {Function} transform The rest array transform.
+              * @returns {Function} Returns the new function.
+              */
 
-       var pow$2 = function (x, n, acc) {
-         return n === 0 ? acc : n % 2 === 1 ? pow$2(x, n - 1, acc * x) : pow$2(x * x, n / 2, acc);
-       };
 
-       var log$2 = function (x) {
-         var n = 0;
-         var x2 = x;
-         while (x2 >= 4096) {
-           n += 12;
-           x2 /= 4096;
-         }
-         while (x2 >= 2) {
-           n += 1;
-           x2 /= 2;
-         } return n;
-       };
+             function overRest(func, start, transform) {
+               start = nativeMax(start === undefined$1 ? func.length - 1 : start, 0);
+               return function () {
+                 var args = arguments,
+                     index = -1,
+                     length = nativeMax(args.length - start, 0),
+                     array = Array(length);
 
-       var FORCED$c = nativeToFixed && (
-         0.00008.toFixed(3) !== '0.000' ||
-         0.9.toFixed(0) !== '1' ||
-         1.255.toFixed(2) !== '1.25' ||
-         1000000000000000128.0.toFixed(0) !== '1000000000000000128'
-       ) || !fails(function () {
-         // V8 ~ Android 4.3-
-         nativeToFixed.call({});
-       });
+                 while (++index < length) {
+                   array[index] = args[start + index];
+                 }
 
-       // `Number.prototype.toFixed` method
-       // https://tc39.github.io/ecma262/#sec-number.prototype.tofixed
-       _export({ target: 'Number', proto: true, forced: FORCED$c }, {
-         // eslint-disable-next-line max-statements
-         toFixed: function toFixed(fractionDigits) {
-           var number = thisNumberValue(this);
-           var fractDigits = toInteger(fractionDigits);
-           var data = [0, 0, 0, 0, 0, 0];
-           var sign = '';
-           var result = '0';
-           var e, z, j, k;
+                 index = -1;
+                 var otherArgs = Array(start + 1);
 
-           var multiply = function (n, c) {
-             var index = -1;
-             var c2 = c;
-             while (++index < 6) {
-               c2 += n * data[index];
-               data[index] = c2 % 1e7;
-               c2 = floor$6(c2 / 1e7);
+                 while (++index < start) {
+                   otherArgs[index] = args[index];
+                 }
+
+                 otherArgs[start] = transform(array);
+                 return apply(func, this, otherArgs);
+               };
              }
-           };
+             /**
+              * Gets the parent value at `path` of `object`.
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @param {Array} path The path to get the parent value of.
+              * @returns {*} Returns the parent value.
+              */
+
 
-           var divide = function (n) {
-             var index = 6;
-             var c = 0;
-             while (--index >= 0) {
-               c += data[index];
-               data[index] = floor$6(c / n);
-               c = (c % n) * 1e7;
+             function parent(object, path) {
+               return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
              }
-           };
+             /**
+              * Reorder `array` according to the specified indexes where the element at
+              * the first index is assigned as the first element, the element at
+              * the second index is assigned as the second element, and so on.
+              *
+              * @private
+              * @param {Array} array The array to reorder.
+              * @param {Array} indexes The arranged array indexes.
+              * @returns {Array} Returns `array`.
+              */
 
-           var dataToString = function () {
-             var index = 6;
-             var s = '';
-             while (--index >= 0) {
-               if (s !== '' || index === 0 || data[index] !== 0) {
-                 var t = String(data[index]);
-                 s = s === '' ? t : s + stringRepeat.call('0', 7 - t.length) + t;
-               }
-             } return s;
-           };
 
-           if (fractDigits < 0 || fractDigits > 20) throw RangeError('Incorrect fraction digits');
-           // eslint-disable-next-line no-self-compare
-           if (number != number) return 'NaN';
-           if (number <= -1e21 || number >= 1e21) return String(number);
-           if (number < 0) {
-             sign = '-';
-             number = -number;
-           }
-           if (number > 1e-21) {
-             e = log$2(number * pow$2(2, 69, 1)) - 69;
-             z = e < 0 ? number * pow$2(2, -e, 1) : number / pow$2(2, e, 1);
-             z *= 0x10000000000000;
-             e = 52 - e;
-             if (e > 0) {
-               multiply(0, z);
-               j = fractDigits;
-               while (j >= 7) {
-                 multiply(1e7, 0);
-                 j -= 7;
-               }
-               multiply(pow$2(10, j, 1), 0);
-               j = e - 1;
-               while (j >= 23) {
-                 divide(1 << 23);
-                 j -= 23;
+             function reorder(array, indexes) {
+               var arrLength = array.length,
+                   length = nativeMin(indexes.length, arrLength),
+                   oldArray = copyArray(array);
+
+               while (length--) {
+                 var index = indexes[length];
+                 array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined$1;
                }
-               divide(1 << j);
-               multiply(1, 1);
-               divide(2);
-               result = dataToString();
-             } else {
-               multiply(0, z);
-               multiply(1 << -e, 0);
-               result = dataToString() + stringRepeat.call('0', fractDigits);
+
+               return array;
              }
-           }
-           if (fractDigits > 0) {
-             k = result.length;
-             result = sign + (k <= fractDigits
-               ? '0.' + stringRepeat.call('0', fractDigits - k) + result
-               : result.slice(0, k - fractDigits) + '.' + result.slice(k - fractDigits));
-           } else {
-             result = sign + result;
-           } return result;
-         }
-       });
+             /**
+              * Gets the value at `key`, unless `key` is "__proto__" or "constructor".
+              *
+              * @private
+              * @param {Object} object The object to query.
+              * @param {string} key The key of the property to get.
+              * @returns {*} Returns the property value.
+              */
 
-       var nativeToPrecision = 1.0.toPrecision;
 
-       var FORCED$d = fails(function () {
-         // IE7-
-         return nativeToPrecision.call(1, undefined) !== '1';
-       }) || !fails(function () {
-         // V8 ~ Android 4.3-
-         nativeToPrecision.call({});
-       });
+             function safeGet(object, key) {
+               if (key === 'constructor' && typeof object[key] === 'function') {
+                 return;
+               }
 
-       // `Number.prototype.toPrecision` method
-       // https://tc39.github.io/ecma262/#sec-number.prototype.toprecision
-       _export({ target: 'Number', proto: true, forced: FORCED$d }, {
-         toPrecision: function toPrecision(precision) {
-           return precision === undefined
-             ? nativeToPrecision.call(thisNumberValue(this))
-             : nativeToPrecision.call(thisNumberValue(this), precision);
-         }
-       });
+               if (key == '__proto__') {
+                 return;
+               }
 
-       var prefixExponent;
-       function formatPrefixAuto (x, p) {
-         var d = formatDecimalParts(x, p);
-         if (!d) return x + "";
-         var coefficient = d[0],
-             exponent = d[1],
-             i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
-             n = coefficient.length;
-         return i === n ? coefficient : i > n ? coefficient + new Array(i - n + 1).join("0") : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) : "0." + new Array(1 - i).join("0") + formatDecimalParts(x, Math.max(0, p + i - 1))[0]; // less than 1y!
-       }
+               return object[key];
+             }
+             /**
+              * Sets metadata for `func`.
+              *
+              * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
+              * period of time, it will trip its breaker and transition to an identity
+              * function to avoid garbage collection pauses in V8. See
+              * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
+              * for more details.
+              *
+              * @private
+              * @param {Function} func The function to associate metadata with.
+              * @param {*} data The metadata.
+              * @returns {Function} Returns `func`.
+              */
 
-       function formatRounded (x, p) {
-         var d = formatDecimalParts(x, p);
-         if (!d) return x + "";
-         var coefficient = d[0],
-             exponent = d[1];
-         return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) : coefficient + new Array(exponent - coefficient.length + 2).join("0");
-       }
 
-       var formatTypes = {
-         "%": function _(x, p) {
-           return (x * 100).toFixed(p);
-         },
-         "b": function b(x) {
-           return Math.round(x).toString(2);
-         },
-         "c": function c(x) {
-           return x + "";
-         },
-         "d": formatDecimal,
-         "e": function e(x, p) {
-           return x.toExponential(p);
-         },
-         "f": function f(x, p) {
-           return x.toFixed(p);
-         },
-         "g": function g(x, p) {
-           return x.toPrecision(p);
-         },
-         "o": function o(x) {
-           return Math.round(x).toString(8);
-         },
-         "p": function p(x, _p) {
-           return formatRounded(x * 100, _p);
-         },
-         "r": formatRounded,
-         "s": formatPrefixAuto,
-         "X": function X(x) {
-           return Math.round(x).toString(16).toUpperCase();
-         },
-         "x": function x(_x) {
-           return Math.round(_x).toString(16);
-         }
-       };
+             var setData = shortOut(baseSetData);
+             /**
+              * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
+              *
+              * @private
+              * @param {Function} func The function to delay.
+              * @param {number} wait The number of milliseconds to delay invocation.
+              * @returns {number|Object} Returns the timer id or timeout object.
+              */
 
-       function identity$4 (x) {
-         return x;
-       }
+             var setTimeout = ctxSetTimeout || function (func, wait) {
+               return root.setTimeout(func, wait);
+             };
+             /**
+              * Sets the `toString` method of `func` to return `string`.
+              *
+              * @private
+              * @param {Function} func The function to modify.
+              * @param {Function} string The `toString` result.
+              * @returns {Function} Returns `func`.
+              */
 
-       var map = Array.prototype.map,
-           prefixes = ["y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y"];
-       function formatLocale (locale) {
-         var group = locale.grouping === undefined || locale.thousands === undefined ? identity$4 : formatGroup(map.call(locale.grouping, Number), locale.thousands + ""),
-             currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
-             currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
-             decimal = locale.decimal === undefined ? "." : locale.decimal + "",
-             numerals = locale.numerals === undefined ? identity$4 : formatNumerals(map.call(locale.numerals, String)),
-             percent = locale.percent === undefined ? "%" : locale.percent + "",
-             minus = locale.minus === undefined ? "−" : locale.minus + "",
-             nan = locale.nan === undefined ? "NaN" : locale.nan + "";
 
-         function newFormat(specifier) {
-           specifier = formatSpecifier(specifier);
-           var fill = specifier.fill,
-               align = specifier.align,
-               sign = specifier.sign,
-               symbol = specifier.symbol,
-               zero = specifier.zero,
-               width = specifier.width,
-               comma = specifier.comma,
-               precision = specifier.precision,
-               trim = specifier.trim,
-               type = specifier.type; // The "n" type is an alias for ",g".
+             var setToString = shortOut(baseSetToString);
+             /**
+              * Sets the `toString` method of `wrapper` to mimic the source of `reference`
+              * with wrapper details in a comment at the top of the source body.
+              *
+              * @private
+              * @param {Function} wrapper The function to modify.
+              * @param {Function} reference The reference function.
+              * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+              * @returns {Function} Returns `wrapper`.
+              */
 
-           if (type === "n") comma = true, type = "g"; // The "" type, and any invalid type, is an alias for ".12~g".
-           else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g"; // If zero fill is specified, padding goes after sign and before digits.
+             function setWrapToString(wrapper, reference, bitmask) {
+               var source = reference + '';
+               return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
+             }
+             /**
+              * Creates a function that'll short out and invoke `identity` instead
+              * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
+              * milliseconds.
+              *
+              * @private
+              * @param {Function} func The function to restrict.
+              * @returns {Function} Returns the new shortable function.
+              */
 
-           if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
-           // For SI-prefix, the suffix is lazily computed.
 
-           var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
-               suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : ""; // What format function should we use?
-           // Is this an integer type?
-           // Can this type generate exponential notation?
+             function shortOut(func) {
+               var count = 0,
+                   lastCalled = 0;
+               return function () {
+                 var stamp = nativeNow(),
+                     remaining = HOT_SPAN - (stamp - lastCalled);
+                 lastCalled = stamp;
 
-           var formatType = formatTypes[type],
-               maybeSuffix = /[defgprs%]/.test(type); // Set the default precision if not specified,
-           // or clamp the specified precision to the supported range.
-           // For significant precision, it must be in [1, 21].
-           // For fixed precision, it must be in [0, 20].
+                 if (remaining > 0) {
+                   if (++count >= HOT_COUNT) {
+                     return arguments[0];
+                   }
+                 } else {
+                   count = 0;
+                 }
 
-           precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
+                 return func.apply(undefined$1, arguments);
+               };
+             }
+             /**
+              * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
+              *
+              * @private
+              * @param {Array} array The array to shuffle.
+              * @param {number} [size=array.length] The size of `array`.
+              * @returns {Array} Returns `array`.
+              */
 
-           function format(value) {
-             var valuePrefix = prefix,
-                 valueSuffix = suffix,
-                 i,
-                 n,
-                 c;
 
-             if (type === "c") {
-               valueSuffix = formatType(value) + valueSuffix;
-               value = "";
-             } else {
-               value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
+             function shuffleSelf(array, size) {
+               var index = -1,
+                   length = array.length,
+                   lastIndex = length - 1;
+               size = size === undefined$1 ? length : size;
 
-               var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
+               while (++index < size) {
+                 var rand = baseRandom(index, lastIndex),
+                     value = array[rand];
+                 array[rand] = array[index];
+                 array[index] = value;
+               }
 
-               value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
+               array.length = size;
+               return array;
+             }
+             /**
+              * Converts `string` to a property path array.
+              *
+              * @private
+              * @param {string} string The string to convert.
+              * @returns {Array} Returns the property path array.
+              */
 
-               if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
 
-               if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
+             var stringToPath = memoizeCapped(function (string) {
+               var result = [];
 
-               valuePrefix = (valueNegative ? sign === "(" ? sign : minus : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
-               valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : ""); // Break the formatted value into the integer “value” part that can be
-               // grouped, and fractional or exponential “suffix” part that is not.
+               if (string.charCodeAt(0) === 46
+               /* . */
+               ) {
+                 result.push('');
+               }
 
-               if (maybeSuffix) {
-                 i = -1, n = value.length;
+               string.replace(rePropName, function (match, number, quote, subString) {
+                 result.push(quote ? subString.replace(reEscapeChar, '$1') : number || match);
+               });
+               return result;
+             });
+             /**
+              * Converts `value` to a string key if it's not a string or symbol.
+              *
+              * @private
+              * @param {*} value The value to inspect.
+              * @returns {string|symbol} Returns the key.
+              */
 
-                 while (++i < n) {
-                   if (c = value.charCodeAt(i), 48 > c || c > 57) {
-                     valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
-                     value = value.slice(0, i);
-                     break;
-                   }
-                 }
+             function toKey(value) {
+               if (typeof value == 'string' || isSymbol(value)) {
+                 return value;
                }
-             } // If the fill character is not "0", grouping is applied before padding.
 
+               var result = value + '';
+               return result == '0' && 1 / value == -INFINITY ? '-0' : result;
+             }
+             /**
+              * Converts `func` to its source code.
+              *
+              * @private
+              * @param {Function} func The function to convert.
+              * @returns {string} Returns the source code.
+              */
 
-             if (comma && !zero) value = group(value, Infinity); // Compute the padding.
 
-             var length = valuePrefix.length + value.length + valueSuffix.length,
-                 padding = length < width ? new Array(width - length + 1).join(fill) : ""; // If the fill character is "0", grouping is applied after padding.
+             function toSource(func) {
+               if (func != null) {
+                 try {
+                   return funcToString.call(func);
+                 } catch (e) {}
 
-             if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
+                 try {
+                   return func + '';
+                 } catch (e) {}
+               }
 
-             switch (align) {
-               case "<":
-                 value = valuePrefix + value + valueSuffix + padding;
-                 break;
+               return '';
+             }
+             /**
+              * Updates wrapper `details` based on `bitmask` flags.
+              *
+              * @private
+              * @returns {Array} details The details to modify.
+              * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
+              * @returns {Array} Returns `details`.
+              */
 
-               case "=":
-                 value = valuePrefix + padding + value + valueSuffix;
-                 break;
 
-               case "^":
-                 value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
-                 break;
+             function updateWrapDetails(details, bitmask) {
+               arrayEach(wrapFlags, function (pair) {
+                 var value = '_.' + pair[0];
 
-               default:
-                 value = padding + valuePrefix + value + valueSuffix;
-                 break;
+                 if (bitmask & pair[1] && !arrayIncludes(details, value)) {
+                   details.push(value);
+                 }
+               });
+               return details.sort();
              }
+             /**
+              * Creates a clone of `wrapper`.
+              *
+              * @private
+              * @param {Object} wrapper The wrapper to clone.
+              * @returns {Object} Returns the cloned wrapper.
+              */
 
-             return numerals(value);
-           }
 
-           format.toString = function () {
-             return specifier + "";
-           };
+             function wrapperClone(wrapper) {
+               if (wrapper instanceof LazyWrapper) {
+                 return wrapper.clone();
+               }
 
-           return format;
-         }
+               var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
+               result.__actions__ = copyArray(wrapper.__actions__);
+               result.__index__ = wrapper.__index__;
+               result.__values__ = wrapper.__values__;
+               return result;
+             }
+             /*------------------------------------------------------------------------*/
 
-         function formatPrefix(specifier, value) {
-           var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
-               e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
-               k = Math.pow(10, -e),
-               prefix = prefixes[8 + e / 3];
-           return function (value) {
-             return f(k * value) + prefix;
-           };
-         }
+             /**
+              * Creates an array of elements split into groups the length of `size`.
+              * If `array` can't be split evenly, the final chunk will be the remaining
+              * elements.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to process.
+              * @param {number} [size=1] The length of each chunk
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Array} Returns the new array of chunks.
+              * @example
+              *
+              * _.chunk(['a', 'b', 'c', 'd'], 2);
+              * // => [['a', 'b'], ['c', 'd']]
+              *
+              * _.chunk(['a', 'b', 'c', 'd'], 3);
+              * // => [['a', 'b', 'c'], ['d']]
+              */
 
-         return {
-           format: newFormat,
-           formatPrefix: formatPrefix
-         };
-       }
 
-       var locale;
-       var format;
-       var formatPrefix;
-       defaultLocale({
-         thousands: ",",
-         grouping: [3],
-         currency: ["$", ""]
-       });
-       function defaultLocale(definition) {
-         locale = formatLocale(definition);
-         format = locale.format;
-         formatPrefix = locale.formatPrefix;
-         return locale;
-       }
+             function chunk(array, size, guard) {
+               if (guard ? isIterateeCall(array, size, guard) : size === undefined$1) {
+                 size = 1;
+               } else {
+                 size = nativeMax(toInteger(size), 0);
+               }
 
-       function precisionFixed (step) {
-         return Math.max(0, -exponent(Math.abs(step)));
-       }
+               var length = array == null ? 0 : array.length;
 
-       function precisionPrefix (step, value) {
-         return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
-       }
+               if (!length || size < 1) {
+                 return [];
+               }
 
-       function precisionRound (step, max) {
-         step = Math.abs(step), max = Math.abs(max) - step;
-         return Math.max(0, exponent(max) - exponent(step)) + 1;
-       }
+               var index = 0,
+                   resIndex = 0,
+                   result = Array(nativeCeil(length / size));
 
-       function tickFormat(start, stop, count, specifier) {
-         var step = tickStep(start, stop, count),
-             precision;
-         specifier = formatSpecifier(specifier == null ? ",f" : specifier);
+               while (index < length) {
+                 result[resIndex++] = baseSlice(array, index, index += size);
+               }
 
-         switch (specifier.type) {
-           case "s":
-             {
-               var value = Math.max(Math.abs(start), Math.abs(stop));
-               if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
-               return formatPrefix(specifier, value);
+               return result;
              }
+             /**
+              * Creates an array with all falsey values removed. The values `false`, `null`,
+              * `0`, `""`, `undefined`, and `NaN` are falsey.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to compact.
+              * @returns {Array} Returns the new array of filtered values.
+              * @example
+              *
+              * _.compact([0, 1, false, 2, '', 3]);
+              * // => [1, 2, 3]
+              */
 
-           case "":
-           case "e":
-           case "g":
-           case "p":
-           case "r":
-             {
-               if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
-               break;
-             }
 
-           case "f":
-           case "%":
-             {
-               if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
-               break;
-             }
-         }
+             function compact(array) {
+               var index = -1,
+                   length = array == null ? 0 : array.length,
+                   resIndex = 0,
+                   result = [];
 
-         return format(specifier);
-       }
+               while (++index < length) {
+                 var value = array[index];
 
-       function linearish(scale) {
-         var domain = scale.domain;
+                 if (value) {
+                   result[resIndex++] = value;
+                 }
+               }
 
-         scale.ticks = function (count) {
-           var d = domain();
-           return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
-         };
+               return result;
+             }
+             /**
+              * Creates a new array concatenating `array` with any additional arrays
+              * and/or values.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to concatenate.
+              * @param {...*} [values] The values to concatenate.
+              * @returns {Array} Returns the new concatenated array.
+              * @example
+              *
+              * var array = [1];
+              * var other = _.concat(array, 2, [3], [[4]]);
+              *
+              * console.log(other);
+              * // => [1, 2, 3, [4]]
+              *
+              * console.log(array);
+              * // => [1]
+              */
 
-         scale.tickFormat = function (count, specifier) {
-           var d = domain();
-           return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
-         };
 
-         scale.nice = function (count) {
-           if (count == null) count = 10;
-           var d = domain();
-           var i0 = 0;
-           var i1 = d.length - 1;
-           var start = d[i0];
-           var stop = d[i1];
-           var prestep;
-           var step;
-           var maxIter = 10;
+             function concat() {
+               var length = arguments.length;
 
-           if (stop < start) {
-             step = start, start = stop, stop = step;
-             step = i0, i0 = i1, i1 = step;
-           }
+               if (!length) {
+                 return [];
+               }
 
-           while (maxIter-- > 0) {
-             step = tickIncrement(start, stop, count);
+               var args = Array(length - 1),
+                   array = arguments[0],
+                   index = length;
 
-             if (step === prestep) {
-               d[i0] = start;
-               d[i1] = stop;
-               return domain(d);
-             } else if (step > 0) {
-               start = Math.floor(start / step) * step;
-               stop = Math.ceil(stop / step) * step;
-             } else if (step < 0) {
-               start = Math.ceil(start * step) / step;
-               stop = Math.floor(stop * step) / step;
-             } else {
-               break;
+               while (index--) {
+                 args[index - 1] = arguments[index];
+               }
+
+               return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
              }
+             /**
+              * Creates an array of `array` values not included in the other given arrays
+              * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * for equality comparisons. The order and references of result values are
+              * determined by the first array.
+              *
+              * **Note:** Unlike `_.pullAll`, this method returns a new array.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {...Array} [values] The values to exclude.
+              * @returns {Array} Returns the new array of filtered values.
+              * @see _.without, _.xor
+              * @example
+              *
+              * _.difference([2, 1], [2, 3]);
+              * // => [1]
+              */
 
-             prestep = step;
-           }
 
-           return scale;
-         };
+             var difference = baseRest(function (array, values) {
+               return isArrayLikeObject(array) ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true)) : [];
+             });
+             /**
+              * This method is like `_.difference` except that it accepts `iteratee` which
+              * is invoked for each element of `array` and `values` to generate the criterion
+              * by which they're compared. The order and references of result values are
+              * determined by the first array. The iteratee is invoked with one argument:
+              * (value).
+              *
+              * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {...Array} [values] The values to exclude.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {Array} Returns the new array of filtered values.
+              * @example
+              *
+              * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+              * // => [1.2]
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
+              * // => [{ 'x': 2 }]
+              */
 
-         return scale;
-       }
-       function linear$2() {
-         var scale = continuous();
+             var differenceBy = baseRest(function (array, values) {
+               var iteratee = last(values);
 
-         scale.copy = function () {
-           return copy(scale, linear$2());
-         };
+               if (isArrayLikeObject(iteratee)) {
+                 iteratee = undefined$1;
+               }
 
-         initRange.apply(scale, arguments);
-         return linearish(scale);
-       }
+               return isArrayLikeObject(array) ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2)) : [];
+             });
+             /**
+              * This method is like `_.difference` except that it accepts `comparator`
+              * which is invoked to compare elements of `array` to `values`. The order and
+              * references of result values are determined by the first array. The comparator
+              * is invoked with two arguments: (arrVal, othVal).
+              *
+              * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {...Array} [values] The values to exclude.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns the new array of filtered values.
+              * @example
+              *
+              * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+              *
+              * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
+              * // => [{ 'x': 2, 'y': 1 }]
+              */
 
-       var nativeExpm1 = Math.expm1;
-       var exp$1 = Math.exp;
+             var differenceWith = baseRest(function (array, values) {
+               var comparator = last(values);
 
-       // `Math.expm1` method implementation
-       // https://tc39.github.io/ecma262/#sec-math.expm1
-       var mathExpm1 = (!nativeExpm1
-         // Old FF bug
-         || nativeExpm1(10) > 22025.465794806719 || nativeExpm1(10) < 22025.4657948067165168
-         // Tor Browser bug
-         || nativeExpm1(-2e-17) != -2e-17
-       ) ? function expm1(x) {
-         return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp$1(x) - 1;
-       } : nativeExpm1;
+               if (isArrayLikeObject(comparator)) {
+                 comparator = undefined$1;
+               }
 
-       function quantize() {
-         var x0 = 0,
-             x1 = 1,
-             n = 1,
-             domain = [0.5],
-             range = [0, 1],
-             unknown;
+               return isArrayLikeObject(array) ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined$1, comparator) : [];
+             });
+             /**
+              * Creates a slice of `array` with `n` elements dropped from the beginning.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.5.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @param {number} [n=1] The number of elements to drop.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * _.drop([1, 2, 3]);
+              * // => [2, 3]
+              *
+              * _.drop([1, 2, 3], 2);
+              * // => [3]
+              *
+              * _.drop([1, 2, 3], 5);
+              * // => []
+              *
+              * _.drop([1, 2, 3], 0);
+              * // => [1, 2, 3]
+              */
+
+             function drop(array, n, guard) {
+               var length = array == null ? 0 : array.length;
+
+               if (!length) {
+                 return [];
+               }
+
+               n = guard || n === undefined$1 ? 1 : toInteger(n);
+               return baseSlice(array, n < 0 ? 0 : n, length);
+             }
+             /**
+              * Creates a slice of `array` with `n` elements dropped from the end.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @param {number} [n=1] The number of elements to drop.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * _.dropRight([1, 2, 3]);
+              * // => [1, 2]
+              *
+              * _.dropRight([1, 2, 3], 2);
+              * // => [1]
+              *
+              * _.dropRight([1, 2, 3], 5);
+              * // => []
+              *
+              * _.dropRight([1, 2, 3], 0);
+              * // => [1, 2, 3]
+              */
 
-         function scale(x) {
-           return x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
-         }
 
-         function rescale() {
-           var i = -1;
-           domain = new Array(n);
+             function dropRight(array, n, guard) {
+               var length = array == null ? 0 : array.length;
 
-           while (++i < n) {
-             domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
-           }
+               if (!length) {
+                 return [];
+               }
 
-           return scale;
-         }
+               n = guard || n === undefined$1 ? 1 : toInteger(n);
+               n = length - n;
+               return baseSlice(array, 0, n < 0 ? 0 : n);
+             }
+             /**
+              * Creates a slice of `array` excluding elements dropped from the end.
+              * Elements are dropped until `predicate` returns falsey. The predicate is
+              * invoked with three arguments: (value, index, array).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney',  'active': true },
+              *   { 'user': 'fred',    'active': false },
+              *   { 'user': 'pebbles', 'active': false }
+              * ];
+              *
+              * _.dropRightWhile(users, function(o) { return !o.active; });
+              * // => objects for ['barney']
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
+              * // => objects for ['barney', 'fred']
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.dropRightWhile(users, ['active', false]);
+              * // => objects for ['barney']
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.dropRightWhile(users, 'active');
+              * // => objects for ['barney', 'fred', 'pebbles']
+              */
 
-         scale.domain = function (_) {
-           var _ref, _ref2;
 
-           return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
-         };
+             function dropRightWhile(array, predicate) {
+               return array && array.length ? baseWhile(array, getIteratee(predicate, 3), true, true) : [];
+             }
+             /**
+              * Creates a slice of `array` excluding elements dropped from the beginning.
+              * Elements are dropped until `predicate` returns falsey. The predicate is
+              * invoked with three arguments: (value, index, array).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney',  'active': false },
+              *   { 'user': 'fred',    'active': false },
+              *   { 'user': 'pebbles', 'active': true }
+              * ];
+              *
+              * _.dropWhile(users, function(o) { return !o.active; });
+              * // => objects for ['pebbles']
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.dropWhile(users, { 'user': 'barney', 'active': false });
+              * // => objects for ['fred', 'pebbles']
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.dropWhile(users, ['active', false]);
+              * // => objects for ['pebbles']
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.dropWhile(users, 'active');
+              * // => objects for ['barney', 'fred', 'pebbles']
+              */
 
-         scale.range = function (_) {
-           return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
-         };
 
-         scale.invertExtent = function (y) {
-           var i = range.indexOf(y);
-           return i < 0 ? [NaN, NaN] : i < 1 ? [x0, domain[0]] : i >= n ? [domain[n - 1], x1] : [domain[i - 1], domain[i]];
-         };
+             function dropWhile(array, predicate) {
+               return array && array.length ? baseWhile(array, getIteratee(predicate, 3), true) : [];
+             }
+             /**
+              * Fills elements of `array` with `value` from `start` up to, but not
+              * including, `end`.
+              *
+              * **Note:** This method mutates `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.2.0
+              * @category Array
+              * @param {Array} array The array to fill.
+              * @param {*} value The value to fill `array` with.
+              * @param {number} [start=0] The start position.
+              * @param {number} [end=array.length] The end position.
+              * @returns {Array} Returns `array`.
+              * @example
+              *
+              * var array = [1, 2, 3];
+              *
+              * _.fill(array, 'a');
+              * console.log(array);
+              * // => ['a', 'a', 'a']
+              *
+              * _.fill(Array(3), 2);
+              * // => [2, 2, 2]
+              *
+              * _.fill([4, 6, 8, 10], '*', 1, 3);
+              * // => [4, '*', '*', 10]
+              */
 
-         scale.unknown = function (_) {
-           return arguments.length ? (unknown = _, scale) : scale;
-         };
 
-         scale.thresholds = function () {
-           return domain.slice();
-         };
+             function fill(array, value, start, end) {
+               var length = array == null ? 0 : array.length;
 
-         scale.copy = function () {
-           return quantize().domain([x0, x1]).range(range).unknown(unknown);
-         };
+               if (!length) {
+                 return [];
+               }
 
-         return initRange.apply(linearish(scale), arguments);
-       }
+               if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
+                 start = 0;
+                 end = length;
+               }
 
-       // https://github.com/tc39/proposal-string-pad-start-end
+               return baseFill(array, value, start, end);
+             }
+             /**
+              * This method is like `_.find` except that it returns the index of the first
+              * element `predicate` returns truthy for instead of the element itself.
+              *
+              * @static
+              * @memberOf _
+              * @since 1.1.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @param {number} [fromIndex=0] The index to search from.
+              * @returns {number} Returns the index of the found element, else `-1`.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney',  'active': false },
+              *   { 'user': 'fred',    'active': false },
+              *   { 'user': 'pebbles', 'active': true }
+              * ];
+              *
+              * _.findIndex(users, function(o) { return o.user == 'barney'; });
+              * // => 0
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.findIndex(users, { 'user': 'fred', 'active': false });
+              * // => 1
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.findIndex(users, ['active', false]);
+              * // => 0
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.findIndex(users, 'active');
+              * // => 2
+              */
 
 
+             function findIndex(array, predicate, fromIndex) {
+               var length = array == null ? 0 : array.length;
 
+               if (!length) {
+                 return -1;
+               }
 
-       var ceil$1 = Math.ceil;
+               var index = fromIndex == null ? 0 : toInteger(fromIndex);
 
-       // `String.prototype.{ padStart, padEnd }` methods implementation
-       var createMethod$6 = function (IS_END) {
-         return function ($this, maxLength, fillString) {
-           var S = String(requireObjectCoercible($this));
-           var stringLength = S.length;
-           var fillStr = fillString === undefined ? ' ' : String(fillString);
-           var intMaxLength = toLength(maxLength);
-           var fillLen, stringFiller;
-           if (intMaxLength <= stringLength || fillStr == '') return S;
-           fillLen = intMaxLength - stringLength;
-           stringFiller = stringRepeat.call(fillStr, ceil$1(fillLen / fillStr.length));
-           if (stringFiller.length > fillLen) stringFiller = stringFiller.slice(0, fillLen);
-           return IS_END ? S + stringFiller : stringFiller + S;
-         };
-       };
+               if (index < 0) {
+                 index = nativeMax(length + index, 0);
+               }
 
-       var stringPad = {
-         // `String.prototype.padStart` method
-         // https://tc39.github.io/ecma262/#sec-string.prototype.padstart
-         start: createMethod$6(false),
-         // `String.prototype.padEnd` method
-         // https://tc39.github.io/ecma262/#sec-string.prototype.padend
-         end: createMethod$6(true)
-       };
+               return baseFindIndex(array, getIteratee(predicate, 3), index);
+             }
+             /**
+              * This method is like `_.findIndex` except that it iterates over elements
+              * of `collection` from right to left.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @param {number} [fromIndex=array.length-1] The index to search from.
+              * @returns {number} Returns the index of the found element, else `-1`.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney',  'active': true },
+              *   { 'user': 'fred',    'active': false },
+              *   { 'user': 'pebbles', 'active': false }
+              * ];
+              *
+              * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
+              * // => 2
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.findLastIndex(users, { 'user': 'barney', 'active': true });
+              * // => 0
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.findLastIndex(users, ['active', false]);
+              * // => 2
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.findLastIndex(users, 'active');
+              * // => 0
+              */
 
-       var padStart = stringPad.start;
 
-       var abs$3 = Math.abs;
-       var DatePrototype$1 = Date.prototype;
-       var getTime$1 = DatePrototype$1.getTime;
-       var nativeDateToISOString = DatePrototype$1.toISOString;
+             function findLastIndex(array, predicate, fromIndex) {
+               var length = array == null ? 0 : array.length;
 
-       // `Date.prototype.toISOString` method implementation
-       // https://tc39.github.io/ecma262/#sec-date.prototype.toisostring
-       // PhantomJS / old WebKit fails here:
-       var dateToIsoString = (fails(function () {
-         return nativeDateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
-       }) || !fails(function () {
-         nativeDateToISOString.call(new Date(NaN));
-       })) ? function toISOString() {
-         if (!isFinite(getTime$1.call(this))) throw RangeError('Invalid time value');
-         var date = this;
-         var year = date.getUTCFullYear();
-         var milliseconds = date.getUTCMilliseconds();
-         var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
-         return sign + padStart(abs$3(year), sign ? 6 : 4, 0) +
-           '-' + padStart(date.getUTCMonth() + 1, 2, 0) +
-           '-' + padStart(date.getUTCDate(), 2, 0) +
-           'T' + padStart(date.getUTCHours(), 2, 0) +
-           ':' + padStart(date.getUTCMinutes(), 2, 0) +
-           ':' + padStart(date.getUTCSeconds(), 2, 0) +
-           '.' + padStart(milliseconds, 3, 0) +
-           'Z';
-       } : nativeDateToISOString;
+               if (!length) {
+                 return -1;
+               }
 
-       // `Date.prototype.toISOString` method
-       // https://tc39.github.io/ecma262/#sec-date.prototype.toisostring
-       // PhantomJS / old WebKit has a broken implementations
-       _export({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== dateToIsoString }, {
-         toISOString: dateToIsoString
-       });
+               var index = length - 1;
 
-       function behaviorBreathe() {
-         var duration = 800;
-         var steps = 4;
-         var selector = '.selected.shadow, .selected .shadow';
+               if (fromIndex !== undefined$1) {
+                 index = toInteger(fromIndex);
+                 index = fromIndex < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
+               }
 
-         var _selected = select(null);
+               return baseFindIndex(array, getIteratee(predicate, 3), index, true);
+             }
+             /**
+              * Flattens `array` a single level deep.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to flatten.
+              * @returns {Array} Returns the new flattened array.
+              * @example
+              *
+              * _.flatten([1, [2, [3, [4]], 5]]);
+              * // => [1, 2, [3, [4]], 5]
+              */
 
-         var _classed = '';
-         var _params = {};
-         var _done = false;
 
-         var _timer;
+             function flatten(array) {
+               var length = array == null ? 0 : array.length;
+               return length ? baseFlatten(array, 1) : [];
+             }
+             /**
+              * Recursively flattens `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to flatten.
+              * @returns {Array} Returns the new flattened array.
+              * @example
+              *
+              * _.flattenDeep([1, [2, [3, [4]], 5]]);
+              * // => [1, 2, 3, 4, 5]
+              */
 
-         function ratchetyInterpolator(a, b, steps, units) {
-           a = parseFloat(a);
-           b = parseFloat(b);
-           var sample = quantize().domain([0, 1]).range(d3_quantize(d3_interpolateNumber(a, b), steps));
-           return function (t) {
-             return String(sample(t)) + (units || '');
-           };
-         }
 
-         function reset(selection) {
-           selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
-         }
+             function flattenDeep(array) {
+               var length = array == null ? 0 : array.length;
+               return length ? baseFlatten(array, INFINITY) : [];
+             }
+             /**
+              * Recursively flatten `array` up to `depth` times.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.4.0
+              * @category Array
+              * @param {Array} array The array to flatten.
+              * @param {number} [depth=1] The maximum recursion depth.
+              * @returns {Array} Returns the new flattened array.
+              * @example
+              *
+              * var array = [1, [2, [3, [4]], 5]];
+              *
+              * _.flattenDepth(array, 1);
+              * // => [1, 2, [3, [4]], 5]
+              *
+              * _.flattenDepth(array, 2);
+              * // => [1, 2, 3, [4], 5]
+              */
 
-         function setAnimationParams(transition, fromTo) {
-           var toFrom = fromTo === 'from' ? 'to' : 'from';
-           transition.styleTween('stroke-opacity', function (d) {
-             return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
-           }).styleTween('stroke-width', function (d) {
-             return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
-           }).styleTween('fill-opacity', function (d) {
-             return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
-           }).styleTween('r', function (d) {
-             return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
-           });
-         }
 
-         function calcAnimationParams(selection) {
-           selection.call(reset).each(function (d) {
-             var s = select(this);
-             var tag = s.node().tagName;
-             var p = {
-               'from': {},
-               'to': {}
-             };
-             var opacity;
-             var width; // determine base opacity and width
+             function flattenDepth(array, depth) {
+               var length = array == null ? 0 : array.length;
 
-             if (tag === 'circle') {
-               opacity = parseFloat(s.style('fill-opacity') || 0.5);
-               width = parseFloat(s.style('r') || 15.5);
-             } else {
-               opacity = parseFloat(s.style('stroke-opacity') || 0.7);
-               width = parseFloat(s.style('stroke-width') || 10);
-             } // calculate from/to interpolation params..
+               if (!length) {
+                 return [];
+               }
 
+               depth = depth === undefined$1 ? 1 : toInteger(depth);
+               return baseFlatten(array, depth);
+             }
+             /**
+              * The inverse of `_.toPairs`; this method returns an object composed
+              * from key-value `pairs`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} pairs The key-value pairs.
+              * @returns {Object} Returns the new object.
+              * @example
+              *
+              * _.fromPairs([['a', 1], ['b', 2]]);
+              * // => { 'a': 1, 'b': 2 }
+              */
 
-             p.tag = tag;
-             p.from.opacity = opacity * 0.6;
-             p.to.opacity = opacity * 1.25;
-             p.from.width = width * 0.7;
-             p.to.width = width * (tag === 'circle' ? 1.5 : 1);
-             _params[d.id] = p;
-           });
-         }
 
-         function run(surface, fromTo) {
-           var toFrom = fromTo === 'from' ? 'to' : 'from';
-           var currSelected = surface.selectAll(selector);
-           var currClassed = surface.attr('class');
+             function fromPairs(pairs) {
+               var index = -1,
+                   length = pairs == null ? 0 : pairs.length,
+                   result = {};
 
-           if (_done || currSelected.empty()) {
-             _selected.call(reset);
+               while (++index < length) {
+                 var pair = pairs[index];
+                 result[pair[0]] = pair[1];
+               }
 
-             _selected = select(null);
-             return;
-           }
+               return result;
+             }
+             /**
+              * Gets the first element of `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @alias first
+              * @category Array
+              * @param {Array} array The array to query.
+              * @returns {*} Returns the first element of `array`.
+              * @example
+              *
+              * _.head([1, 2, 3]);
+              * // => 1
+              *
+              * _.head([]);
+              * // => undefined
+              */
 
-           if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
-             _selected.call(reset);
 
-             _classed = currClassed;
-             _selected = currSelected.call(calcAnimationParams);
-           }
+             function head(array) {
+               return array && array.length ? array[0] : undefined$1;
+             }
+             /**
+              * Gets the index at which the first occurrence of `value` is found in `array`
+              * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * for equality comparisons. If `fromIndex` is negative, it's used as the
+              * offset from the end of `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {*} value The value to search for.
+              * @param {number} [fromIndex=0] The index to search from.
+              * @returns {number} Returns the index of the matched value, else `-1`.
+              * @example
+              *
+              * _.indexOf([1, 2, 1, 2], 2);
+              * // => 1
+              *
+              * // Search from the `fromIndex`.
+              * _.indexOf([1, 2, 1, 2], 2, 2);
+              * // => 3
+              */
 
-           var didCallNextRun = false;
 
-           _selected.transition().duration(duration).call(setAnimationParams, fromTo).on('end', function () {
-             // `end` event is called for each selected element, but we want
-             // it to run only once
-             if (!didCallNextRun) {
-               surface.call(run, toFrom);
-               didCallNextRun = true;
-             } // if entity was deselected, remove breathe styling
+             function indexOf(array, value, fromIndex) {
+               var length = array == null ? 0 : array.length;
 
+               if (!length) {
+                 return -1;
+               }
 
-             if (!select(this).classed('selected')) {
-               reset(select(this));
+               var index = fromIndex == null ? 0 : toInteger(fromIndex);
+
+               if (index < 0) {
+                 index = nativeMax(length + index, 0);
+               }
+
+               return baseIndexOf(array, value, index);
              }
-           });
-         }
+             /**
+              * Gets all but the last element of `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * _.initial([1, 2, 3]);
+              * // => [1, 2]
+              */
 
-         function behavior(surface) {
-           _done = false;
-           _timer = timer(function () {
-             // wait for elements to actually become selected
-             if (surface.selectAll(selector).empty()) {
-               return false;
+
+             function initial(array) {
+               var length = array == null ? 0 : array.length;
+               return length ? baseSlice(array, 0, -1) : [];
              }
+             /**
+              * Creates an array of unique values that are included in all given arrays
+              * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * for equality comparisons. The order and references of result values are
+              * determined by the first array.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to inspect.
+              * @returns {Array} Returns the new array of intersecting values.
+              * @example
+              *
+              * _.intersection([2, 1], [2, 3]);
+              * // => [2]
+              */
 
-             surface.call(run, 'from');
 
-             _timer.stop();
+             var intersection = baseRest(function (arrays) {
+               var mapped = arrayMap(arrays, castArrayLikeObject);
+               return mapped.length && mapped[0] === arrays[0] ? baseIntersection(mapped) : [];
+             });
+             /**
+              * This method is like `_.intersection` except that it accepts `iteratee`
+              * which is invoked for each element of each `arrays` to generate the criterion
+              * by which they're compared. The order and references of result values are
+              * determined by the first array. The iteratee is invoked with one argument:
+              * (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to inspect.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {Array} Returns the new array of intersecting values.
+              * @example
+              *
+              * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+              * // => [2.1]
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+              * // => [{ 'x': 1 }]
+              */
 
-             return true;
-           }, 20);
-         }
+             var intersectionBy = baseRest(function (arrays) {
+               var iteratee = last(arrays),
+                   mapped = arrayMap(arrays, castArrayLikeObject);
 
-         behavior.restartIfNeeded = function (surface) {
-           if (_selected.empty()) {
-             surface.call(run, 'from');
+               if (iteratee === last(mapped)) {
+                 iteratee = undefined$1;
+               } else {
+                 mapped.pop();
+               }
 
-             if (_timer) {
-               _timer.stop();
-             }
-           }
-         };
+               return mapped.length && mapped[0] === arrays[0] ? baseIntersection(mapped, getIteratee(iteratee, 2)) : [];
+             });
+             /**
+              * This method is like `_.intersection` except that it accepts `comparator`
+              * which is invoked to compare elements of `arrays`. The order and references
+              * of result values are determined by the first array. The comparator is
+              * invoked with two arguments: (arrVal, othVal).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to inspect.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns the new array of intersecting values.
+              * @example
+              *
+              * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+              * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+              *
+              * _.intersectionWith(objects, others, _.isEqual);
+              * // => [{ 'x': 1, 'y': 2 }]
+              */
 
-         behavior.off = function () {
-           _done = true;
+             var intersectionWith = baseRest(function (arrays) {
+               var comparator = last(arrays),
+                   mapped = arrayMap(arrays, castArrayLikeObject);
+               comparator = typeof comparator == 'function' ? comparator : undefined$1;
 
-           if (_timer) {
-             _timer.stop();
-           }
+               if (comparator) {
+                 mapped.pop();
+               }
 
-           _selected.interrupt().call(reset);
-         };
+               return mapped.length && mapped[0] === arrays[0] ? baseIntersection(mapped, undefined$1, comparator) : [];
+             });
+             /**
+              * Converts all elements in `array` into a string separated by `separator`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to convert.
+              * @param {string} [separator=','] The element separator.
+              * @returns {string} Returns the joined string.
+              * @example
+              *
+              * _.join(['a', 'b', 'c'], '~');
+              * // => 'a~b~c'
+              */
 
-         return behavior;
-       }
+             function join(array, separator) {
+               return array == null ? '' : nativeJoin.call(array, separator);
+             }
+             /**
+              * Gets the last element of `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @returns {*} Returns the last element of `array`.
+              * @example
+              *
+              * _.last([1, 2, 3]);
+              * // => 3
+              */
 
-       /* Creates a keybinding behavior for an operation */
-       function behaviorOperation(context) {
-         var _operation;
 
-         function keypress(d3_event) {
-           // prevent operations during low zoom selection
-           if (!context.map().withinEditableZoom()) return;
-           if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
-           d3_event.preventDefault();
+             function last(array) {
+               var length = array == null ? 0 : array.length;
+               return length ? array[length - 1] : undefined$1;
+             }
+             /**
+              * This method is like `_.indexOf` except that it iterates over elements of
+              * `array` from right to left.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {*} value The value to search for.
+              * @param {number} [fromIndex=array.length-1] The index to search from.
+              * @returns {number} Returns the index of the matched value, else `-1`.
+              * @example
+              *
+              * _.lastIndexOf([1, 2, 1, 2], 2);
+              * // => 3
+              *
+              * // Search from the `fromIndex`.
+              * _.lastIndexOf([1, 2, 1, 2], 2, 2);
+              * // => 1
+              */
 
-           var disabled = _operation.disabled();
 
-           if (disabled) {
-             context.ui().flash.duration(4000).iconName('#iD-operation-' + _operation.id).iconClass('operation disabled').label(_operation.tooltip)();
-           } else {
-             context.ui().flash.duration(2000).iconName('#iD-operation-' + _operation.id).iconClass('operation').label(_operation.annotation() || _operation.title)();
-             if (_operation.point) _operation.point(null);
+             function lastIndexOf(array, value, fromIndex) {
+               var length = array == null ? 0 : array.length;
 
-             _operation();
-           }
-         }
+               if (!length) {
+                 return -1;
+               }
 
-         function behavior() {
-           if (_operation && _operation.available()) {
-             context.keybinding().on(_operation.keys, keypress);
-           }
+               var index = length;
 
-           return behavior;
-         }
+               if (fromIndex !== undefined$1) {
+                 index = toInteger(fromIndex);
+                 index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
+               }
 
-         behavior.off = function () {
-           context.keybinding().off(_operation.keys);
-         };
+               return value === value ? strictLastIndexOf(array, value, index) : baseFindIndex(array, baseIsNaN, index, true);
+             }
+             /**
+              * Gets the element at index `n` of `array`. If `n` is negative, the nth
+              * element from the end is returned.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.11.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @param {number} [n=0] The index of the element to return.
+              * @returns {*} Returns the nth element of `array`.
+              * @example
+              *
+              * var array = ['a', 'b', 'c', 'd'];
+              *
+              * _.nth(array, 1);
+              * // => 'b'
+              *
+              * _.nth(array, -2);
+              * // => 'c';
+              */
 
-         behavior.which = function (_) {
-           if (!arguments.length) return _operation;
-           _operation = _;
-           return behavior;
-         };
 
-         return behavior;
-       }
+             function nth(array, n) {
+               return array && array.length ? baseNth(array, toInteger(n)) : undefined$1;
+             }
+             /**
+              * Removes all given values from `array` using
+              * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * for equality comparisons.
+              *
+              * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
+              * to remove elements from an array by predicate.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @category Array
+              * @param {Array} array The array to modify.
+              * @param {...*} [values] The values to remove.
+              * @returns {Array} Returns `array`.
+              * @example
+              *
+              * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+              *
+              * _.pull(array, 'a', 'c');
+              * console.log(array);
+              * // => ['b', 'b']
+              */
 
-       function operationCircularize(context, selectedIDs) {
-         var _extent;
 
-         var _actions = selectedIDs.map(getAction).filter(Boolean);
+             var pull = baseRest(pullAll);
+             /**
+              * This method is like `_.pull` except that it accepts an array of values to remove.
+              *
+              * **Note:** Unlike `_.difference`, this method mutates `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to modify.
+              * @param {Array} values The values to remove.
+              * @returns {Array} Returns `array`.
+              * @example
+              *
+              * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
+              *
+              * _.pullAll(array, ['a', 'c']);
+              * console.log(array);
+              * // => ['b', 'b']
+              */
 
-         var _amount = _actions.length === 1 ? 'single' : 'multiple';
+             function pullAll(array, values) {
+               return array && array.length && values && values.length ? basePullAll(array, values) : array;
+             }
+             /**
+              * This method is like `_.pullAll` except that it accepts `iteratee` which is
+              * invoked for each element of `array` and `values` to generate the criterion
+              * by which they're compared. The iteratee is invoked with one argument: (value).
+              *
+              * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to modify.
+              * @param {Array} values The values to remove.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {Array} Returns `array`.
+              * @example
+              *
+              * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
+              *
+              * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
+              * console.log(array);
+              * // => [{ 'x': 2 }]
+              */
 
-         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
-           return n.loc;
-         });
 
-         function getAction(entityID) {
-           var entity = context.entity(entityID);
-           if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
+             function pullAllBy(array, values, iteratee) {
+               return array && array.length && values && values.length ? basePullAll(array, values, getIteratee(iteratee, 2)) : array;
+             }
+             /**
+              * This method is like `_.pullAll` except that it accepts `comparator` which
+              * is invoked to compare elements of `array` to `values`. The comparator is
+              * invoked with two arguments: (arrVal, othVal).
+              *
+              * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.6.0
+              * @category Array
+              * @param {Array} array The array to modify.
+              * @param {Array} values The values to remove.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns `array`.
+              * @example
+              *
+              * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
+              *
+              * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
+              * console.log(array);
+              * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
+              */
 
-           if (!_extent) {
-             _extent = entity.extent(context.graph());
-           } else {
-             _extent = _extent.extend(entity.extent(context.graph()));
-           }
 
-           return actionCircularize(entityID, context.projection);
-         }
+             function pullAllWith(array, values, comparator) {
+               return array && array.length && values && values.length ? basePullAll(array, values, undefined$1, comparator) : array;
+             }
+             /**
+              * Removes elements from `array` corresponding to `indexes` and returns an
+              * array of removed elements.
+              *
+              * **Note:** Unlike `_.at`, this method mutates `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to modify.
+              * @param {...(number|number[])} [indexes] The indexes of elements to remove.
+              * @returns {Array} Returns the new array of removed elements.
+              * @example
+              *
+              * var array = ['a', 'b', 'c', 'd'];
+              * var pulled = _.pullAt(array, [1, 3]);
+              *
+              * console.log(array);
+              * // => ['a', 'c']
+              *
+              * console.log(pulled);
+              * // => ['b', 'd']
+              */
 
-         var operation = function operation() {
-           if (!_actions.length) return;
 
-           var combinedAction = function combinedAction(graph, t) {
-             _actions.forEach(function (action) {
-               if (!action.disabled(graph)) {
-                 graph = action(graph, t);
-               }
+             var pullAt = flatRest(function (array, indexes) {
+               var length = array == null ? 0 : array.length,
+                   result = baseAt(array, indexes);
+               basePullAt(array, arrayMap(indexes, function (index) {
+                 return isIndex(index, length) ? +index : index;
+               }).sort(compareAscending));
+               return result;
              });
+             /**
+              * Removes all elements from `array` that `predicate` returns truthy for
+              * and returns an array of the removed elements. The predicate is invoked
+              * with three arguments: (value, index, array).
+              *
+              * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
+              * to pull elements from an array by value.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @category Array
+              * @param {Array} array The array to modify.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the new array of removed elements.
+              * @example
+              *
+              * var array = [1, 2, 3, 4];
+              * var evens = _.remove(array, function(n) {
+              *   return n % 2 == 0;
+              * });
+              *
+              * console.log(array);
+              * // => [1, 3]
+              *
+              * console.log(evens);
+              * // => [2, 4]
+              */
 
-             return graph;
-           };
-
-           combinedAction.transitionable = true;
-           context.perform(combinedAction, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
-         };
+             function remove(array, predicate) {
+               var result = [];
 
-         operation.available = function () {
-           return _actions.length && selectedIDs.length === _actions.length;
-         }; // don't cache this because the visible extent could change
+               if (!(array && array.length)) {
+                 return result;
+               }
 
+               var index = -1,
+                   indexes = [],
+                   length = array.length;
+               predicate = getIteratee(predicate, 3);
 
-         operation.disabled = function () {
-           if (!_actions.length) return '';
+               while (++index < length) {
+                 var value = array[index];
 
-           var actionDisableds = _actions.map(function (action) {
-             return action.disabled(context.graph());
-           }).filter(Boolean);
+                 if (predicate(value, index, array)) {
+                   result.push(value);
+                   indexes.push(index);
+                 }
+               }
 
-           if (actionDisableds.length === _actions.length) {
-             // none of the features can be circularized
-             if (new Set(actionDisableds).size > 1) {
-               return 'multiple_blockers';
+               basePullAt(array, indexes);
+               return result;
              }
+             /**
+              * Reverses `array` so that the first element becomes the last, the second
+              * element becomes the second to last, and so on.
+              *
+              * **Note:** This method mutates `array` and is based on
+              * [`Array#reverse`](https://mdn.io/Array/reverse).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to modify.
+              * @returns {Array} Returns `array`.
+              * @example
+              *
+              * var array = [1, 2, 3];
+              *
+              * _.reverse(array);
+              * // => [3, 2, 1]
+              *
+              * console.log(array);
+              * // => [3, 2, 1]
+              */
 
-             return actionDisableds[0];
-           } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
-           } else if (someMissing()) {
-             return 'not_downloaded';
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
-           }
 
-           return false;
+             function reverse(array) {
+               return array == null ? array : nativeReverse.call(array);
+             }
+             /**
+              * Creates a slice of `array` from `start` up to, but not including, `end`.
+              *
+              * **Note:** This method is used instead of
+              * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
+              * returned.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to slice.
+              * @param {number} [start=0] The start position.
+              * @param {number} [end=array.length] The end position.
+              * @returns {Array} Returns the slice of `array`.
+              */
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+             function slice(array, start, end) {
+               var length = array == null ? 0 : array.length;
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
+               if (!length) {
+                 return [];
+               }
+
+               if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
+                 start = 0;
+                 end = length;
+               } else {
+                 start = start == null ? 0 : toInteger(start);
+                 end = end === undefined$1 ? length : toInteger(end);
                }
+
+               return baseSlice(array, start, end);
              }
+             /**
+              * Uses a binary search to determine the lowest index at which `value`
+              * should be inserted into `array` in order to maintain its sort order.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The sorted array to inspect.
+              * @param {*} value The value to evaluate.
+              * @returns {number} Returns the index at which `value` should be inserted
+              *  into `array`.
+              * @example
+              *
+              * _.sortedIndex([30, 50], 40);
+              * // => 1
+              */
 
-             return false;
-           }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
-         };
+             function sortedIndex(array, value) {
+               return baseSortedIndex(array, value);
+             }
+             /**
+              * This method is like `_.sortedIndex` except that it accepts `iteratee`
+              * which is invoked for `value` and each element of `array` to compute their
+              * sort ranking. The iteratee is invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The sorted array to inspect.
+              * @param {*} value The value to evaluate.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {number} Returns the index at which `value` should be inserted
+              *  into `array`.
+              * @example
+              *
+              * var objects = [{ 'x': 4 }, { 'x': 5 }];
+              *
+              * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+              * // => 0
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
+              * // => 0
+              */
 
-         operation.annotation = function () {
-           return _t('operations.circularize.annotation.feature', {
-             n: _actions.length
-           });
-         };
 
-         operation.id = 'circularize';
-         operation.keys = [_t('operations.circularize.key')];
-         operation.title = _t('operations.circularize.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+             function sortedIndexBy(array, value, iteratee) {
+               return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
+             }
+             /**
+              * This method is like `_.indexOf` except that it performs a binary
+              * search on a sorted `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {*} value The value to search for.
+              * @returns {number} Returns the index of the matched value, else `-1`.
+              * @example
+              *
+              * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
+              * // => 1
+              */
 
-       // For example, ⌘Z -> Ctrl+Z
 
-       var uiCmd = function uiCmd(code) {
-         var detected = utilDetect();
+             function sortedIndexOf(array, value) {
+               var length = array == null ? 0 : array.length;
 
-         if (detected.os === 'mac') {
-           return code;
-         }
+               if (length) {
+                 var index = baseSortedIndex(array, value);
 
-         if (detected.os === 'win') {
-           if (code === '⌘⇧Z') return 'Ctrl+Y';
-         }
+                 if (index < length && eq(array[index], value)) {
+                   return index;
+                 }
+               }
 
-         var result = '',
-             replacements = {
-           '⌘': 'Ctrl',
-           '⇧': 'Shift',
-           '⌥': 'Alt',
-           '⌫': 'Backspace',
-           '⌦': 'Delete'
-         };
+               return -1;
+             }
+             /**
+              * This method is like `_.sortedIndex` except that it returns the highest
+              * index at which `value` should be inserted into `array` in order to
+              * maintain its sort order.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The sorted array to inspect.
+              * @param {*} value The value to evaluate.
+              * @returns {number} Returns the index at which `value` should be inserted
+              *  into `array`.
+              * @example
+              *
+              * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
+              * // => 4
+              */
 
-         for (var i = 0; i < code.length; i++) {
-           if (code[i] in replacements) {
-             result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
-           } else {
-             result += code[i];
-           }
-         }
 
-         return result;
-       }; // return a display-focused string for a given keyboard code
+             function sortedLastIndex(array, value) {
+               return baseSortedIndex(array, value, true);
+             }
+             /**
+              * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
+              * which is invoked for `value` and each element of `array` to compute their
+              * sort ranking. The iteratee is invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The sorted array to inspect.
+              * @param {*} value The value to evaluate.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {number} Returns the index at which `value` should be inserted
+              *  into `array`.
+              * @example
+              *
+              * var objects = [{ 'x': 4 }, { 'x': 5 }];
+              *
+              * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
+              * // => 1
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
+              * // => 1
+              */
 
-       uiCmd.display = function (code) {
-         if (code.length !== 1) return code;
-         var detected = utilDetect();
-         var mac = detected.os === 'mac';
-         var replacements = {
-           '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd') : _t('shortcuts.key.ctrl'),
-           '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift') : _t('shortcuts.key.shift'),
-           '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
-           '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl') : _t('shortcuts.key.ctrl'),
-           '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
-           '⌦': mac ? '⌦ ' + _t('shortcuts.key.del') : _t('shortcuts.key.del'),
-           '↖': mac ? '↖ ' + _t('shortcuts.key.pgup') : _t('shortcuts.key.pgup'),
-           '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn') : _t('shortcuts.key.pgdn'),
-           '⇞': mac ? '⇞ ' + _t('shortcuts.key.home') : _t('shortcuts.key.home'),
-           '⇟': mac ? '⇟ ' + _t('shortcuts.key.end') : _t('shortcuts.key.end'),
-           '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
-           '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc') : _t('shortcuts.key.esc'),
-           '☰': mac ? '☰ ' + _t('shortcuts.key.menu') : _t('shortcuts.key.menu')
-         };
-         return replacements[code] || code;
-       };
 
-       function operationDelete(context, selectedIDs) {
-         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
-         var action = actionDeleteMultiple(selectedIDs);
-         var nodes = utilGetAllNodes(selectedIDs, context.graph());
-         var coords = nodes.map(function (n) {
-           return n.loc;
-         });
-         var extent = utilTotalExtent(selectedIDs, context.graph());
+             function sortedLastIndexBy(array, value, iteratee) {
+               return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
+             }
+             /**
+              * This method is like `_.lastIndexOf` except that it performs a binary
+              * search on a sorted `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {*} value The value to search for.
+              * @returns {number} Returns the index of the matched value, else `-1`.
+              * @example
+              *
+              * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
+              * // => 3
+              */
 
-         var operation = function operation() {
-           var nextSelectedID;
-           var nextSelectedLoc;
 
-           if (selectedIDs.length === 1) {
-             var id = selectedIDs[0];
-             var entity = context.entity(id);
-             var geometry = entity.geometry(context.graph());
-             var parents = context.graph().parentWays(entity);
-             var parent = parents[0]; // Select the next closest node in the way.
+             function sortedLastIndexOf(array, value) {
+               var length = array == null ? 0 : array.length;
 
-             if (geometry === 'vertex') {
-               var nodes = parent.nodes;
-               var i = nodes.indexOf(id);
+               if (length) {
+                 var index = baseSortedIndex(array, value, true) - 1;
 
-               if (i === 0) {
-                 i++;
-               } else if (i === nodes.length - 1) {
-                 i--;
-               } else {
-                 var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
-                 var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
-                 i = a < b ? i - 1 : i + 1;
+                 if (eq(array[index], value)) {
+                   return index;
+                 }
                }
 
-               nextSelectedID = nodes[i];
-               nextSelectedLoc = context.entity(nextSelectedID).loc;
+               return -1;
              }
-           }
+             /**
+              * This method is like `_.uniq` except that it's designed and optimized
+              * for sorted arrays.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @returns {Array} Returns the new duplicate free array.
+              * @example
+              *
+              * _.sortedUniq([1, 1, 2]);
+              * // => [1, 2]
+              */
 
-           context.perform(action, operation.annotation());
-           context.validator().validate();
 
-           if (nextSelectedID && nextSelectedLoc) {
-             if (context.hasEntity(nextSelectedID)) {
-               context.enter(modeSelect(context, [nextSelectedID]).follow(true));
-             } else {
-               context.map().centerEase(nextSelectedLoc);
-               context.enter(modeBrowse(context));
+             function sortedUniq(array) {
+               return array && array.length ? baseSortedUniq(array) : [];
              }
-           } else {
-             context.enter(modeBrowse(context));
-           }
-         };
+             /**
+              * This method is like `_.uniqBy` except that it's designed and optimized
+              * for sorted arrays.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {Function} [iteratee] The iteratee invoked per element.
+              * @returns {Array} Returns the new duplicate free array.
+              * @example
+              *
+              * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
+              * // => [1.1, 2.3]
+              */
 
-         operation.available = function () {
-           return true;
-         };
 
-         operation.disabled = function () {
-           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
-           } else if (someMissing()) {
-             return 'not_downloaded';
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
-           } else if (selectedIDs.some(protectedMember)) {
-             return 'part_of_relation';
-           } else if (selectedIDs.some(incompleteRelation)) {
-             return 'incomplete_relation';
-           } else if (selectedIDs.some(hasWikidataTag)) {
-             return 'has_wikidata_tag';
-           }
+             function sortedUniqBy(array, iteratee) {
+               return array && array.length ? baseSortedUniq(array, getIteratee(iteratee, 2)) : [];
+             }
+             /**
+              * Gets all but the first element of `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * _.tail([1, 2, 3]);
+              * // => [2, 3]
+              */
 
-           return false;
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+             function tail(array) {
+               var length = array == null ? 0 : array.length;
+               return length ? baseSlice(array, 1, length) : [];
+             }
+             /**
+              * Creates a slice of `array` with `n` elements taken from the beginning.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @param {number} [n=1] The number of elements to take.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * _.take([1, 2, 3]);
+              * // => [1]
+              *
+              * _.take([1, 2, 3], 2);
+              * // => [1, 2]
+              *
+              * _.take([1, 2, 3], 5);
+              * // => [1, 2, 3]
+              *
+              * _.take([1, 2, 3], 0);
+              * // => []
+              */
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
+             function take(array, n, guard) {
+               if (!(array && array.length)) {
+                 return [];
                }
+
+               n = guard || n === undefined$1 ? 1 : toInteger(n);
+               return baseSlice(array, 0, n < 0 ? 0 : n);
              }
+             /**
+              * Creates a slice of `array` with `n` elements taken from the end.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @param {number} [n=1] The number of elements to take.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * _.takeRight([1, 2, 3]);
+              * // => [3]
+              *
+              * _.takeRight([1, 2, 3], 2);
+              * // => [2, 3]
+              *
+              * _.takeRight([1, 2, 3], 5);
+              * // => [1, 2, 3]
+              *
+              * _.takeRight([1, 2, 3], 0);
+              * // => []
+              */
 
-             return false;
-           }
 
-           function hasWikidataTag(id) {
-             var entity = context.entity(id);
-             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
-           }
+             function takeRight(array, n, guard) {
+               var length = array == null ? 0 : array.length;
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
+               if (!length) {
+                 return [];
+               }
 
-           function protectedMember(id) {
-             var entity = context.entity(id);
-             if (entity.type !== 'way') return false;
-             var parents = context.graph().parentRelations(entity);
+               n = guard || n === undefined$1 ? 1 : toInteger(n);
+               n = length - n;
+               return baseSlice(array, n < 0 ? 0 : n, length);
+             }
+             /**
+              * Creates a slice of `array` with elements taken from the end. Elements are
+              * taken until `predicate` returns falsey. The predicate is invoked with
+              * three arguments: (value, index, array).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney',  'active': true },
+              *   { 'user': 'fred',    'active': false },
+              *   { 'user': 'pebbles', 'active': false }
+              * ];
+              *
+              * _.takeRightWhile(users, function(o) { return !o.active; });
+              * // => objects for ['fred', 'pebbles']
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
+              * // => objects for ['pebbles']
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.takeRightWhile(users, ['active', false]);
+              * // => objects for ['fred', 'pebbles']
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.takeRightWhile(users, 'active');
+              * // => []
+              */
 
-             for (var i = 0; i < parents.length; i++) {
-               var parent = parents[i];
-               var type = parent.tags.type;
-               var role = parent.memberById(id).role || 'outer';
 
-               if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
-                 return true;
-               }
+             function takeRightWhile(array, predicate) {
+               return array && array.length ? baseWhile(array, getIteratee(predicate, 3), false, true) : [];
              }
+             /**
+              * Creates a slice of `array` with elements taken from the beginning. Elements
+              * are taken until `predicate` returns falsey. The predicate is invoked with
+              * three arguments: (value, index, array).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Array
+              * @param {Array} array The array to query.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the slice of `array`.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney',  'active': false },
+              *   { 'user': 'fred',    'active': false },
+              *   { 'user': 'pebbles', 'active': true }
+              * ];
+              *
+              * _.takeWhile(users, function(o) { return !o.active; });
+              * // => objects for ['barney', 'fred']
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.takeWhile(users, { 'user': 'barney', 'active': false });
+              * // => objects for ['barney']
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.takeWhile(users, ['active', false]);
+              * // => objects for ['barney', 'fred']
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.takeWhile(users, 'active');
+              * // => []
+              */
 
-             return false;
-           }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
-         };
+             function takeWhile(array, predicate) {
+               return array && array.length ? baseWhile(array, getIteratee(predicate, 3)) : [];
+             }
+             /**
+              * Creates an array of unique values, in order, from all given arrays using
+              * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * for equality comparisons.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to inspect.
+              * @returns {Array} Returns the new array of combined values.
+              * @example
+              *
+              * _.union([2], [1, 2]);
+              * // => [2, 1]
+              */
 
-         operation.annotation = function () {
-           return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
-             n: selectedIDs.length
-           });
-         };
 
-         operation.id = 'delete';
-         operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
-         operation.title = _t('operations.delete.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+             var union = baseRest(function (arrays) {
+               return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
+             });
+             /**
+              * This method is like `_.union` except that it accepts `iteratee` which is
+              * invoked for each element of each `arrays` to generate the criterion by
+              * which uniqueness is computed. Result values are chosen from the first
+              * array in which the value occurs. The iteratee is invoked with one argument:
+              * (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to inspect.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {Array} Returns the new array of combined values.
+              * @example
+              *
+              * _.unionBy([2.1], [1.2, 2.3], Math.floor);
+              * // => [2.1, 1.2]
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+              * // => [{ 'x': 1 }, { 'x': 2 }]
+              */
 
-       function operationOrthogonalize(context, selectedIDs) {
-         var _extent;
+             var unionBy = baseRest(function (arrays) {
+               var iteratee = last(arrays);
 
-         var _type;
+               if (isArrayLikeObject(iteratee)) {
+                 iteratee = undefined$1;
+               }
 
-         var _actions = selectedIDs.map(chooseAction).filter(Boolean);
+               return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
+             });
+             /**
+              * This method is like `_.union` except that it accepts `comparator` which
+              * is invoked to compare elements of `arrays`. Result values are chosen from
+              * the first array in which the value occurs. The comparator is invoked
+              * with two arguments: (arrVal, othVal).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to inspect.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns the new array of combined values.
+              * @example
+              *
+              * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+              * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+              *
+              * _.unionWith(objects, others, _.isEqual);
+              * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+              */
 
-         var _amount = _actions.length === 1 ? 'single' : 'multiple';
+             var unionWith = baseRest(function (arrays) {
+               var comparator = last(arrays);
+               comparator = typeof comparator == 'function' ? comparator : undefined$1;
+               return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined$1, comparator);
+             });
+             /**
+              * Creates a duplicate-free version of an array, using
+              * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * for equality comparisons, in which only the first occurrence of each element
+              * is kept. The order of result values is determined by the order they occur
+              * in the array.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @returns {Array} Returns the new duplicate free array.
+              * @example
+              *
+              * _.uniq([2, 1, 2]);
+              * // => [2, 1]
+              */
 
-         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
-           return n.loc;
-         });
+             function uniq(array) {
+               return array && array.length ? baseUniq(array) : [];
+             }
+             /**
+              * This method is like `_.uniq` except that it accepts `iteratee` which is
+              * invoked for each element in `array` to generate the criterion by which
+              * uniqueness is computed. The order of result values is determined by the
+              * order they occur in the array. The iteratee is invoked with one argument:
+              * (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {Array} Returns the new duplicate free array.
+              * @example
+              *
+              * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
+              * // => [2.1, 1.2]
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
+              * // => [{ 'x': 1 }, { 'x': 2 }]
+              */
 
-         function chooseAction(entityID) {
-           var entity = context.entity(entityID);
-           var geometry = entity.geometry(context.graph());
 
-           if (!_extent) {
-             _extent = entity.extent(context.graph());
-           } else {
-             _extent = _extent.extend(entity.extent(context.graph()));
-           } // square a line/area
+             function uniqBy(array, iteratee) {
+               return array && array.length ? baseUniq(array, getIteratee(iteratee, 2)) : [];
+             }
+             /**
+              * This method is like `_.uniq` except that it accepts `comparator` which
+              * is invoked to compare elements of `array`. The order of result values is
+              * determined by the order they occur in the array.The comparator is invoked
+              * with two arguments: (arrVal, othVal).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns the new duplicate free array.
+              * @example
+              *
+              * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
+              *
+              * _.uniqWith(objects, _.isEqual);
+              * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
+              */
 
 
-           if (entity.type === 'way' && new Set(entity.nodes).size > 2) {
-             if (_type && _type !== 'feature') return null;
-             _type = 'feature';
-             return actionOrthogonalize(entityID, context.projection); // square a single vertex
-           } else if (geometry === 'vertex') {
-             if (_type && _type !== 'corner') return null;
-             _type = 'corner';
-             var graph = context.graph();
-             var parents = graph.parentWays(entity);
+             function uniqWith(array, comparator) {
+               comparator = typeof comparator == 'function' ? comparator : undefined$1;
+               return array && array.length ? baseUniq(array, undefined$1, comparator) : [];
+             }
+             /**
+              * This method is like `_.zip` except that it accepts an array of grouped
+              * elements and creates an array regrouping the elements to their pre-zip
+              * configuration.
+              *
+              * @static
+              * @memberOf _
+              * @since 1.2.0
+              * @category Array
+              * @param {Array} array The array of grouped elements to process.
+              * @returns {Array} Returns the new array of regrouped elements.
+              * @example
+              *
+              * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
+              * // => [['a', 1, true], ['b', 2, false]]
+              *
+              * _.unzip(zipped);
+              * // => [['a', 'b'], [1, 2], [true, false]]
+              */
 
-             if (parents.length === 1) {
-               var way = parents[0];
 
-               if (way.nodes.indexOf(entityID) !== -1) {
-                 return actionOrthogonalize(way.id, context.projection, entityID);
+             function unzip(array) {
+               if (!(array && array.length)) {
+                 return [];
                }
-             }
-           }
 
-           return null;
-         }
+               var length = 0;
+               array = arrayFilter(array, function (group) {
+                 if (isArrayLikeObject(group)) {
+                   length = nativeMax(group.length, length);
+                   return true;
+                 }
+               });
+               return baseTimes(length, function (index) {
+                 return arrayMap(array, baseProperty(index));
+               });
+             }
+             /**
+              * This method is like `_.unzip` except that it accepts `iteratee` to specify
+              * how regrouped values should be combined. The iteratee is invoked with the
+              * elements of each group: (...group).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.8.0
+              * @category Array
+              * @param {Array} array The array of grouped elements to process.
+              * @param {Function} [iteratee=_.identity] The function to combine
+              *  regrouped values.
+              * @returns {Array} Returns the new array of regrouped elements.
+              * @example
+              *
+              * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
+              * // => [[1, 10, 100], [2, 20, 200]]
+              *
+              * _.unzipWith(zipped, _.add);
+              * // => [3, 30, 300]
+              */
 
-         var operation = function operation() {
-           if (!_actions.length) return;
 
-           var combinedAction = function combinedAction(graph, t) {
-             _actions.forEach(function (action) {
-               if (!action.disabled(graph)) {
-                 graph = action(graph, t);
+             function unzipWith(array, iteratee) {
+               if (!(array && array.length)) {
+                 return [];
                }
-             });
 
-             return graph;
-           };
+               var result = unzip(array);
 
-           combinedAction.transitionable = true;
-           context.perform(combinedAction, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
-         };
+               if (iteratee == null) {
+                 return result;
+               }
 
-         operation.available = function () {
-           return _actions.length && selectedIDs.length === _actions.length;
-         }; // don't cache this because the visible extent could change
+               return arrayMap(result, function (group) {
+                 return apply(iteratee, undefined$1, group);
+               });
+             }
+             /**
+              * Creates an array excluding all given values using
+              * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * for equality comparisons.
+              *
+              * **Note:** Unlike `_.pull`, this method returns a new array.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {Array} array The array to inspect.
+              * @param {...*} [values] The values to exclude.
+              * @returns {Array} Returns the new array of filtered values.
+              * @see _.difference, _.xor
+              * @example
+              *
+              * _.without([2, 1, 2, 3], 1, 2);
+              * // => [3]
+              */
 
 
-         operation.disabled = function () {
-           if (!_actions.length) return '';
+             var without = baseRest(function (array, values) {
+               return isArrayLikeObject(array) ? baseDifference(array, values) : [];
+             });
+             /**
+              * Creates an array of unique values that is the
+              * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
+              * of the given arrays. The order of result values is determined by the order
+              * they occur in the arrays.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.4.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to inspect.
+              * @returns {Array} Returns the new array of filtered values.
+              * @see _.difference, _.without
+              * @example
+              *
+              * _.xor([2, 1], [2, 3]);
+              * // => [1, 3]
+              */
 
-           var actionDisableds = _actions.map(function (action) {
-             return action.disabled(context.graph());
-           }).filter(Boolean);
+             var xor = baseRest(function (arrays) {
+               return baseXor(arrayFilter(arrays, isArrayLikeObject));
+             });
+             /**
+              * This method is like `_.xor` except that it accepts `iteratee` which is
+              * invoked for each element of each `arrays` to generate the criterion by
+              * which by which they're compared. The order of result values is determined
+              * by the order they occur in the arrays. The iteratee is invoked with one
+              * argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to inspect.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {Array} Returns the new array of filtered values.
+              * @example
+              *
+              * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
+              * // => [1.2, 3.4]
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
+              * // => [{ 'x': 2 }]
+              */
 
-           if (actionDisableds.length === _actions.length) {
-             // none of the features can be squared
-             if (new Set(actionDisableds).size > 1) {
-               return 'multiple_blockers';
-             }
+             var xorBy = baseRest(function (arrays) {
+               var iteratee = last(arrays);
 
-             return actionDisableds[0];
-           } else if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
-           } else if (someMissing()) {
-             return 'not_downloaded';
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
-           }
+               if (isArrayLikeObject(iteratee)) {
+                 iteratee = undefined$1;
+               }
 
-           return false;
+               return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
+             });
+             /**
+              * This method is like `_.xor` except that it accepts `comparator` which is
+              * invoked to compare elements of `arrays`. The order of result values is
+              * determined by the order they occur in the arrays. The comparator is invoked
+              * with two arguments: (arrVal, othVal).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to inspect.
+              * @param {Function} [comparator] The comparator invoked per element.
+              * @returns {Array} Returns the new array of filtered values.
+              * @example
+              *
+              * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
+              * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
+              *
+              * _.xorWith(objects, others, _.isEqual);
+              * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
+              */
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+             var xorWith = baseRest(function (arrays) {
+               var comparator = last(arrays);
+               comparator = typeof comparator == 'function' ? comparator : undefined$1;
+               return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined$1, comparator);
+             });
+             /**
+              * Creates an array of grouped elements, the first of which contains the
+              * first elements of the given arrays, the second of which contains the
+              * second elements of the given arrays, and so on.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to process.
+              * @returns {Array} Returns the new array of grouped elements.
+              * @example
+              *
+              * _.zip(['a', 'b'], [1, 2], [true, false]);
+              * // => [['a', 1, true], ['b', 2, false]]
+              */
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+             var zip = baseRest(unzip);
+             /**
+              * This method is like `_.fromPairs` except that it accepts two arrays,
+              * one of property identifiers and one of corresponding values.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.4.0
+              * @category Array
+              * @param {Array} [props=[]] The property identifiers.
+              * @param {Array} [values=[]] The property values.
+              * @returns {Object} Returns the new object.
+              * @example
+              *
+              * _.zipObject(['a', 'b'], [1, 2]);
+              * // => { 'a': 1, 'b': 2 }
+              */
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
+             function zipObject(props, values) {
+               return baseZipObject(props || [], values || [], assignValue);
              }
+             /**
+              * This method is like `_.zipObject` except that it supports property paths.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.1.0
+              * @category Array
+              * @param {Array} [props=[]] The property identifiers.
+              * @param {Array} [values=[]] The property values.
+              * @returns {Object} Returns the new object.
+              * @example
+              *
+              * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
+              * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
+              */
 
-             return false;
-           }
-         };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
-         };
+             function zipObjectDeep(props, values) {
+               return baseZipObject(props || [], values || [], baseSet);
+             }
+             /**
+              * This method is like `_.zip` except that it accepts `iteratee` to specify
+              * how grouped values should be combined. The iteratee is invoked with the
+              * elements of each group: (...group).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.8.0
+              * @category Array
+              * @param {...Array} [arrays] The arrays to process.
+              * @param {Function} [iteratee=_.identity] The function to combine
+              *  grouped values.
+              * @returns {Array} Returns the new array of grouped elements.
+              * @example
+              *
+              * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
+              *   return a + b + c;
+              * });
+              * // => [111, 222]
+              */
 
-         operation.annotation = function () {
-           return _t('operations.orthogonalize.annotation.' + _type, {
-             n: _actions.length
-           });
-         };
 
-         operation.id = 'orthogonalize';
-         operation.keys = [_t('operations.orthogonalize.key')];
-         operation.title = _t('operations.orthogonalize.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+             var zipWith = baseRest(function (arrays) {
+               var length = arrays.length,
+                   iteratee = length > 1 ? arrays[length - 1] : undefined$1;
+               iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined$1;
+               return unzipWith(arrays, iteratee);
+             });
+             /*------------------------------------------------------------------------*/
 
-       function operationReflectShort(context, selectedIDs) {
-         return operationReflect(context, selectedIDs, 'short');
-       }
-       function operationReflectLong(context, selectedIDs) {
-         return operationReflect(context, selectedIDs, 'long');
-       }
-       function operationReflect(context, selectedIDs, axis) {
-         axis = axis || 'long';
-         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
-         var nodes = utilGetAllNodes(selectedIDs, context.graph());
-         var coords = nodes.map(function (n) {
-           return n.loc;
-         });
-         var extent = utilTotalExtent(selectedIDs, context.graph());
+             /**
+              * Creates a `lodash` wrapper instance that wraps `value` with explicit method
+              * chain sequences enabled. The result of such sequences must be unwrapped
+              * with `_#value`.
+              *
+              * @static
+              * @memberOf _
+              * @since 1.3.0
+              * @category Seq
+              * @param {*} value The value to wrap.
+              * @returns {Object} Returns the new `lodash` wrapper instance.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney',  'age': 36 },
+              *   { 'user': 'fred',    'age': 40 },
+              *   { 'user': 'pebbles', 'age': 1 }
+              * ];
+              *
+              * var youngest = _
+              *   .chain(users)
+              *   .sortBy('age')
+              *   .map(function(o) {
+              *     return o.user + ' is ' + o.age;
+              *   })
+              *   .head()
+              *   .value();
+              * // => 'pebbles is 1'
+              */
+
+             function chain(value) {
+               var result = lodash(value);
+               result.__chain__ = true;
+               return result;
+             }
+             /**
+              * This method invokes `interceptor` and returns `value`. The interceptor
+              * is invoked with one argument; (value). The purpose of this method is to
+              * "tap into" a method chain sequence in order to modify intermediate results.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Seq
+              * @param {*} value The value to provide to `interceptor`.
+              * @param {Function} interceptor The function to invoke.
+              * @returns {*} Returns `value`.
+              * @example
+              *
+              * _([1, 2, 3])
+              *  .tap(function(array) {
+              *    // Mutate input array.
+              *    array.pop();
+              *  })
+              *  .reverse()
+              *  .value();
+              * // => [2, 1]
+              */
 
-         var operation = function operation() {
-           var action = actionReflect(selectedIDs, context.projection).useLongAxis(Boolean(axis === 'long'));
-           context.perform(action, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
-         };
 
-         operation.available = function () {
-           return nodes.length >= 3;
-         }; // don't cache this because the visible extent could change
+             function tap(value, interceptor) {
+               interceptor(value);
+               return value;
+             }
+             /**
+              * This method is like `_.tap` except that it returns the result of `interceptor`.
+              * The purpose of this method is to "pass thru" values replacing intermediate
+              * results in a method chain sequence.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Seq
+              * @param {*} value The value to provide to `interceptor`.
+              * @param {Function} interceptor The function to invoke.
+              * @returns {*} Returns the result of `interceptor`.
+              * @example
+              *
+              * _('  abc  ')
+              *  .chain()
+              *  .trim()
+              *  .thru(function(value) {
+              *    return [value];
+              *  })
+              *  .value();
+              * // => ['abc']
+              */
 
 
-         operation.disabled = function () {
-           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
-           } else if (someMissing()) {
-             return 'not_downloaded';
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
-           } else if (selectedIDs.some(incompleteRelation)) {
-             return 'incomplete_relation';
-           }
+             function thru(value, interceptor) {
+               return interceptor(value);
+             }
+             /**
+              * This method is the wrapper version of `_.at`.
+              *
+              * @name at
+              * @memberOf _
+              * @since 1.0.0
+              * @category Seq
+              * @param {...(string|string[])} [paths] The property paths to pick.
+              * @returns {Object} Returns the new `lodash` wrapper instance.
+              * @example
+              *
+              * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+              *
+              * _(object).at(['a[0].b.c', 'a[1]']).value();
+              * // => [3, 4]
+              */
 
-           return false;
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+             var wrapperAt = flatRest(function (paths) {
+               var length = paths.length,
+                   start = length ? paths[0] : 0,
+                   value = this.__wrapped__,
+                   interceptor = function interceptor(object) {
+                 return baseAt(object, paths);
+               };
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
+               if (length > 1 || this.__actions__.length || !(value instanceof LazyWrapper) || !isIndex(start)) {
+                 return this.thru(interceptor);
+               }
+
+               value = value.slice(start, +start + (length ? 1 : 0));
+
+               value.__actions__.push({
+                 'func': thru,
+                 'args': [interceptor],
+                 'thisArg': undefined$1
                });
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
-             }
+               return new LodashWrapper(value, this.__chain__).thru(function (array) {
+                 if (length && !array.length) {
+                   array.push(undefined$1);
+                 }
 
-             return false;
-           }
+                 return array;
+               });
+             });
+             /**
+              * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
+              *
+              * @name chain
+              * @memberOf _
+              * @since 0.1.0
+              * @category Seq
+              * @returns {Object} Returns the new `lodash` wrapper instance.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney', 'age': 36 },
+              *   { 'user': 'fred',   'age': 40 }
+              * ];
+              *
+              * // A sequence without explicit chaining.
+              * _(users).head();
+              * // => { 'user': 'barney', 'age': 36 }
+              *
+              * // A sequence with explicit chaining.
+              * _(users)
+              *   .chain()
+              *   .head()
+              *   .pick('user')
+              *   .value();
+              * // => { 'user': 'barney' }
+              */
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
-         };
+             function wrapperChain() {
+               return chain(this);
+             }
+             /**
+              * Executes the chain sequence and returns the wrapped result.
+              *
+              * @name commit
+              * @memberOf _
+              * @since 3.2.0
+              * @category Seq
+              * @returns {Object} Returns the new `lodash` wrapper instance.
+              * @example
+              *
+              * var array = [1, 2];
+              * var wrapped = _(array).push(3);
+              *
+              * console.log(array);
+              * // => [1, 2]
+              *
+              * wrapped = wrapped.commit();
+              * console.log(array);
+              * // => [1, 2, 3]
+              *
+              * wrapped.last();
+              * // => 3
+              *
+              * console.log(array);
+              * // => [1, 2, 3]
+              */
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
-         };
 
-         operation.annotation = function () {
-           return _t('operations.reflect.annotation.' + axis + '.feature', {
-             n: selectedIDs.length
-           });
-         };
+             function wrapperCommit() {
+               return new LodashWrapper(this.value(), this.__chain__);
+             }
+             /**
+              * Gets the next value on a wrapped object following the
+              * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
+              *
+              * @name next
+              * @memberOf _
+              * @since 4.0.0
+              * @category Seq
+              * @returns {Object} Returns the next iterator value.
+              * @example
+              *
+              * var wrapped = _([1, 2]);
+              *
+              * wrapped.next();
+              * // => { 'done': false, 'value': 1 }
+              *
+              * wrapped.next();
+              * // => { 'done': false, 'value': 2 }
+              *
+              * wrapped.next();
+              * // => { 'done': true, 'value': undefined }
+              */
 
-         operation.id = 'reflect-' + axis;
-         operation.keys = [_t('operations.reflect.key.' + axis)];
-         operation.title = _t('operations.reflect.title.' + axis);
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
 
-       function operationMove(context, selectedIDs) {
-         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
-         var nodes = utilGetAllNodes(selectedIDs, context.graph());
-         var coords = nodes.map(function (n) {
-           return n.loc;
-         });
-         var extent = utilTotalExtent(selectedIDs, context.graph());
+             function wrapperNext() {
+               if (this.__values__ === undefined$1) {
+                 this.__values__ = toArray(this.value());
+               }
 
-         var operation = function operation() {
-           context.enter(modeMove(context, selectedIDs));
-         };
+               var done = this.__index__ >= this.__values__.length,
+                   value = done ? undefined$1 : this.__values__[this.__index__++];
+               return {
+                 'done': done,
+                 'value': value
+               };
+             }
+             /**
+              * Enables the wrapper to be iterable.
+              *
+              * @name Symbol.iterator
+              * @memberOf _
+              * @since 4.0.0
+              * @category Seq
+              * @returns {Object} Returns the wrapper object.
+              * @example
+              *
+              * var wrapped = _([1, 2]);
+              *
+              * wrapped[Symbol.iterator]() === wrapped;
+              * // => true
+              *
+              * Array.from(wrapped);
+              * // => [1, 2]
+              */
 
-         operation.available = function () {
-           return selectedIDs.length > 1 || context.entity(selectedIDs[0]).type !== 'node';
-         };
 
-         operation.disabled = function () {
-           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
-           } else if (someMissing()) {
-             return 'not_downloaded';
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
-           } else if (selectedIDs.some(incompleteRelation)) {
-             return 'incomplete_relation';
-           }
+             function wrapperToIterator() {
+               return this;
+             }
+             /**
+              * Creates a clone of the chain sequence planting `value` as the wrapped value.
+              *
+              * @name plant
+              * @memberOf _
+              * @since 3.2.0
+              * @category Seq
+              * @param {*} value The value to plant.
+              * @returns {Object} Returns the new `lodash` wrapper instance.
+              * @example
+              *
+              * function square(n) {
+              *   return n * n;
+              * }
+              *
+              * var wrapped = _([1, 2]).map(square);
+              * var other = wrapped.plant([3, 4]);
+              *
+              * other.value();
+              * // => [9, 16]
+              *
+              * wrapped.value();
+              * // => [1, 4]
+              */
 
-           return false;
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+             function wrapperPlant(value) {
+               var result,
+                   parent = this;
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+               while (parent instanceof baseLodash) {
+                 var clone = wrapperClone(parent);
+                 clone.__index__ = 0;
+                 clone.__values__ = undefined$1;
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
-             }
+                 if (result) {
+                   previous.__wrapped__ = clone;
+                 } else {
+                   result = clone;
+                 }
 
-             return false;
-           }
+                 var previous = clone;
+                 parent = parent.__wrapped__;
+               }
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
-         };
+               previous.__wrapped__ = value;
+               return result;
+             }
+             /**
+              * This method is the wrapper version of `_.reverse`.
+              *
+              * **Note:** This method mutates the wrapped array.
+              *
+              * @name reverse
+              * @memberOf _
+              * @since 0.1.0
+              * @category Seq
+              * @returns {Object} Returns the new `lodash` wrapper instance.
+              * @example
+              *
+              * var array = [1, 2, 3];
+              *
+              * _(array).reverse().value()
+              * // => [3, 2, 1]
+              *
+              * console.log(array);
+              * // => [3, 2, 1]
+              */
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
-         };
 
-         operation.annotation = function () {
-           return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
-             n: selectedIDs.length
-           });
-         };
+             function wrapperReverse() {
+               var value = this.__wrapped__;
 
-         operation.id = 'move';
-         operation.keys = [_t('operations.move.key')];
-         operation.title = _t('operations.move.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         operation.mouseOnly = true;
-         return operation;
-       }
+               if (value instanceof LazyWrapper) {
+                 var wrapped = value;
 
-       function modeRotate(context, entityIDs) {
-         var mode = {
-           id: 'rotate',
-           button: 'browse'
-         };
-         var keybinding = utilKeybinding('rotate');
-         var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationMove(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior];
-         var annotation = entityIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.rotate.annotation.feature', {
-           n: entityIDs.length
-         });
+                 if (this.__actions__.length) {
+                   wrapped = new LazyWrapper(this);
+                 }
 
-         var _prevGraph;
+                 wrapped = wrapped.reverse();
 
-         var _prevAngle;
+                 wrapped.__actions__.push({
+                   'func': thru,
+                   'args': [reverse],
+                   'thisArg': undefined$1
+                 });
 
-         var _prevTransform;
+                 return new LodashWrapper(wrapped, this.__chain__);
+               }
 
-         var _pivot;
+               return this.thru(reverse);
+             }
+             /**
+              * Executes the chain sequence to resolve the unwrapped value.
+              *
+              * @name value
+              * @memberOf _
+              * @since 0.1.0
+              * @alias toJSON, valueOf
+              * @category Seq
+              * @returns {*} Returns the resolved unwrapped value.
+              * @example
+              *
+              * _([1, 2, 3]).value();
+              * // => [1, 2, 3]
+              */
 
-         function doRotate() {
-           var fn;
 
-           if (context.graph() !== _prevGraph) {
-             fn = context.perform;
-           } else {
-             fn = context.replace;
-           } // projection changed, recalculate _pivot
+             function wrapperValue() {
+               return baseWrapperValue(this.__wrapped__, this.__actions__);
+             }
+             /*------------------------------------------------------------------------*/
 
+             /**
+              * Creates an object composed of keys generated from the results of running
+              * each element of `collection` thru `iteratee`. The corresponding value of
+              * each key is the number of times the key was returned by `iteratee`. The
+              * iteratee is invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 0.5.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+              * @returns {Object} Returns the composed aggregate object.
+              * @example
+              *
+              * _.countBy([6.1, 4.2, 6.3], Math.floor);
+              * // => { '4': 1, '6': 2 }
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.countBy(['one', 'two', 'three'], 'length');
+              * // => { '3': 2, '5': 1 }
+              */
 
-           var projection = context.projection;
-           var currTransform = projection.transform();
 
-           if (!_prevTransform || currTransform.k !== _prevTransform.k || currTransform.x !== _prevTransform.x || currTransform.y !== _prevTransform.y) {
-             var nodes = utilGetAllNodes(entityIDs, context.graph());
-             var points = nodes.map(function (n) {
-               return projection(n.loc);
+             var countBy = createAggregator(function (result, value, key) {
+               if (hasOwnProperty.call(result, key)) {
+                 ++result[key];
+               } else {
+                 baseAssignValue(result, key, 1);
+               }
              });
-             _pivot = getPivot(points);
-             _prevAngle = undefined;
-           }
-
-           var currMouse = context.map().mouse();
-           var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
-           if (typeof _prevAngle === 'undefined') _prevAngle = currAngle;
-           var delta = currAngle - _prevAngle;
-           fn(actionRotate(entityIDs, _pivot, delta, projection));
-           _prevTransform = currTransform;
-           _prevAngle = currAngle;
-           _prevGraph = context.graph();
-         }
+             /**
+              * Checks if `predicate` returns truthy for **all** elements of `collection`.
+              * Iteration is stopped once `predicate` returns falsey. The predicate is
+              * invoked with three arguments: (value, index|key, collection).
+              *
+              * **Note:** This method returns `true` for
+              * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
+              * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
+              * elements of empty collections.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {boolean} Returns `true` if all elements pass the predicate check,
+              *  else `false`.
+              * @example
+              *
+              * _.every([true, 1, null, 'yes'], Boolean);
+              * // => false
+              *
+              * var users = [
+              *   { 'user': 'barney', 'age': 36, 'active': false },
+              *   { 'user': 'fred',   'age': 40, 'active': false }
+              * ];
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.every(users, { 'user': 'barney', 'active': false });
+              * // => false
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.every(users, ['active', false]);
+              * // => true
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.every(users, 'active');
+              * // => false
+              */
 
-         function getPivot(points) {
-           var _pivot;
+             function every(collection, predicate, guard) {
+               var func = isArray(collection) ? arrayEvery : baseEvery;
 
-           if (points.length === 1) {
-             _pivot = points[0];
-           } else if (points.length === 2) {
-             _pivot = geoVecInterp(points[0], points[1], 0.5);
-           } else {
-             var polygonHull = d3_polygonHull(points);
+               if (guard && isIterateeCall(collection, predicate, guard)) {
+                 predicate = undefined$1;
+               }
 
-             if (polygonHull.length === 2) {
-               _pivot = geoVecInterp(points[0], points[1], 0.5);
-             } else {
-               _pivot = d3_polygonCentroid(d3_polygonHull(points));
+               return func(collection, getIteratee(predicate, 3));
              }
-           }
+             /**
+              * Iterates over elements of `collection`, returning an array of all elements
+              * `predicate` returns truthy for. The predicate is invoked with three
+              * arguments: (value, index|key, collection).
+              *
+              * **Note:** Unlike `_.remove`, this method returns a new array.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the new filtered array.
+              * @see _.reject
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney', 'age': 36, 'active': true },
+              *   { 'user': 'fred',   'age': 40, 'active': false }
+              * ];
+              *
+              * _.filter(users, function(o) { return !o.active; });
+              * // => objects for ['fred']
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.filter(users, { 'age': 36, 'active': true });
+              * // => objects for ['barney']
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.filter(users, ['active', false]);
+              * // => objects for ['fred']
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.filter(users, 'active');
+              * // => objects for ['barney']
+              *
+              * // Combining several predicates using `_.overEvery` or `_.overSome`.
+              * _.filter(users, _.overSome([{ 'age': 36 }, ['age', 40]]));
+              * // => objects for ['fred', 'barney']
+              */
 
-           return _pivot;
-         }
 
-         function finish(d3_event) {
-           d3_event.stopPropagation();
-           context.replace(actionNoop(), annotation);
-           context.enter(modeSelect(context, entityIDs));
-         }
+             function filter(collection, predicate) {
+               var func = isArray(collection) ? arrayFilter : baseFilter;
+               return func(collection, getIteratee(predicate, 3));
+             }
+             /**
+              * Iterates over elements of `collection`, returning the first element
+              * `predicate` returns truthy for. The predicate is invoked with three
+              * arguments: (value, index|key, collection).
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to inspect.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @param {number} [fromIndex=0] The index to search from.
+              * @returns {*} Returns the matched element, else `undefined`.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney',  'age': 36, 'active': true },
+              *   { 'user': 'fred',    'age': 40, 'active': false },
+              *   { 'user': 'pebbles', 'age': 1,  'active': true }
+              * ];
+              *
+              * _.find(users, function(o) { return o.age < 40; });
+              * // => object for 'barney'
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.find(users, { 'age': 1, 'active': true });
+              * // => object for 'pebbles'
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.find(users, ['active', false]);
+              * // => object for 'fred'
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.find(users, 'active');
+              * // => object for 'barney'
+              */
 
-         function cancel() {
-           context.pop();
-           context.enter(modeSelect(context, entityIDs));
-         }
 
-         function undone() {
-           context.enter(modeBrowse(context));
-         }
+             var find = createFind(findIndex);
+             /**
+              * This method is like `_.find` except that it iterates over elements of
+              * `collection` from right to left.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to inspect.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @param {number} [fromIndex=collection.length-1] The index to search from.
+              * @returns {*} Returns the matched element, else `undefined`.
+              * @example
+              *
+              * _.findLast([1, 2, 3, 4], function(n) {
+              *   return n % 2 == 1;
+              * });
+              * // => 3
+              */
 
-         mode.enter = function () {
-           context.features().forceVisible(entityIDs);
-           behaviors.forEach(context.install);
-           context.surface().on('mousemove.rotate', doRotate).on('click.rotate', finish);
-           context.history().on('undone.rotate', undone);
-           keybinding.on('⎋', cancel).on('↩', finish);
-           select(document).call(keybinding);
-         };
+             var findLast = createFind(findLastIndex);
+             /**
+              * Creates a flattened array of values by running each element in `collection`
+              * thru `iteratee` and flattening the mapped results. The iteratee is invoked
+              * with three arguments: (value, index|key, collection).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the new flattened array.
+              * @example
+              *
+              * function duplicate(n) {
+              *   return [n, n];
+              * }
+              *
+              * _.flatMap([1, 2], duplicate);
+              * // => [1, 1, 2, 2]
+              */
 
-         mode.exit = function () {
-           behaviors.forEach(context.uninstall);
-           context.surface().on('mousemove.rotate', null).on('click.rotate', null);
-           context.history().on('undone.rotate', null);
-           select(document).call(keybinding.unbind);
-           context.features().forceVisible([]);
-         };
+             function flatMap(collection, iteratee) {
+               return baseFlatten(map(collection, iteratee), 1);
+             }
+             /**
+              * This method is like `_.flatMap` except that it recursively flattens the
+              * mapped results.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.7.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the new flattened array.
+              * @example
+              *
+              * function duplicate(n) {
+              *   return [[[n, n]]];
+              * }
+              *
+              * _.flatMapDeep([1, 2], duplicate);
+              * // => [1, 1, 2, 2]
+              */
 
-         mode.selectedIDs = function () {
-           if (!arguments.length) return entityIDs; // no assign
 
-           return mode;
-         };
+             function flatMapDeep(collection, iteratee) {
+               return baseFlatten(map(collection, iteratee), INFINITY);
+             }
+             /**
+              * This method is like `_.flatMap` except that it recursively flattens the
+              * mapped results up to `depth` times.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.7.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @param {number} [depth=1] The maximum recursion depth.
+              * @returns {Array} Returns the new flattened array.
+              * @example
+              *
+              * function duplicate(n) {
+              *   return [[[n, n]]];
+              * }
+              *
+              * _.flatMapDepth([1, 2], duplicate, 2);
+              * // => [[1, 1], [2, 2]]
+              */
 
-         return mode;
-       }
 
-       function operationRotate(context, selectedIDs) {
-         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
-         var nodes = utilGetAllNodes(selectedIDs, context.graph());
-         var coords = nodes.map(function (n) {
-           return n.loc;
-         });
-         var extent = utilTotalExtent(selectedIDs, context.graph());
+             function flatMapDepth(collection, iteratee, depth) {
+               depth = depth === undefined$1 ? 1 : toInteger(depth);
+               return baseFlatten(map(collection, iteratee), depth);
+             }
+             /**
+              * Iterates over elements of `collection` and invokes `iteratee` for each element.
+              * The iteratee is invoked with three arguments: (value, index|key, collection).
+              * Iteratee functions may exit iteration early by explicitly returning `false`.
+              *
+              * **Note:** As with other "Collections" methods, objects with a "length"
+              * property are iterated like arrays. To avoid this behavior use `_.forIn`
+              * or `_.forOwn` for object iteration.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @alias each
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Array|Object} Returns `collection`.
+              * @see _.forEachRight
+              * @example
+              *
+              * _.forEach([1, 2], function(value) {
+              *   console.log(value);
+              * });
+              * // => Logs `1` then `2`.
+              *
+              * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
+              *   console.log(key);
+              * });
+              * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+              */
 
-         var operation = function operation() {
-           context.enter(modeRotate(context, selectedIDs));
-         };
 
-         operation.available = function () {
-           return nodes.length >= 2;
-         };
+             function forEach(collection, iteratee) {
+               var func = isArray(collection) ? arrayEach : baseEach;
+               return func(collection, getIteratee(iteratee, 3));
+             }
+             /**
+              * This method is like `_.forEach` except that it iterates over elements of
+              * `collection` from right to left.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @alias eachRight
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Array|Object} Returns `collection`.
+              * @see _.forEach
+              * @example
+              *
+              * _.forEachRight([1, 2], function(value) {
+              *   console.log(value);
+              * });
+              * // => Logs `2` then `1`.
+              */
 
-         operation.disabled = function () {
-           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
-           } else if (someMissing()) {
-             return 'not_downloaded';
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
-           } else if (selectedIDs.some(incompleteRelation)) {
-             return 'incomplete_relation';
-           }
 
-           return false;
+             function forEachRight(collection, iteratee) {
+               var func = isArray(collection) ? arrayEachRight : baseEachRight;
+               return func(collection, getIteratee(iteratee, 3));
+             }
+             /**
+              * Creates an object composed of keys generated from the results of running
+              * each element of `collection` thru `iteratee`. The order of grouped values
+              * is determined by the order they occur in `collection`. The corresponding
+              * value of each key is an array of elements responsible for generating the
+              * key. The iteratee is invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+              * @returns {Object} Returns the composed aggregate object.
+              * @example
+              *
+              * _.groupBy([6.1, 4.2, 6.3], Math.floor);
+              * // => { '4': [4.2], '6': [6.1, 6.3] }
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.groupBy(['one', 'two', 'three'], 'length');
+              * // => { '3': ['one', 'two'], '5': ['three'] }
+              */
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
 
-             if (osm) {
-               var missing = coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+             var groupBy = createAggregator(function (result, value, key) {
+               if (hasOwnProperty.call(result, key)) {
+                 result[key].push(value);
+               } else {
+                 baseAssignValue(result, key, [value]);
+               }
+             });
+             /**
+              * Checks if `value` is in `collection`. If `collection` is a string, it's
+              * checked for a substring of `value`, otherwise
+              * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * is used for equality comparisons. If `fromIndex` is negative, it's used as
+              * the offset from the end of `collection`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object|string} collection The collection to inspect.
+              * @param {*} value The value to search for.
+              * @param {number} [fromIndex=0] The index to search from.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+              * @returns {boolean} Returns `true` if `value` is found, else `false`.
+              * @example
+              *
+              * _.includes([1, 2, 3], 1);
+              * // => true
+              *
+              * _.includes([1, 2, 3], 1, 2);
+              * // => false
+              *
+              * _.includes({ 'a': 1, 'b': 2 }, 1);
+              * // => true
+              *
+              * _.includes('abcd', 'bc');
+              * // => true
+              */
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
+             function includes(collection, value, fromIndex, guard) {
+               collection = isArrayLike(collection) ? collection : values(collection);
+               fromIndex = fromIndex && !guard ? toInteger(fromIndex) : 0;
+               var length = collection.length;
+
+               if (fromIndex < 0) {
+                 fromIndex = nativeMax(length + fromIndex, 0);
                }
+
+               return isString(collection) ? fromIndex <= length && collection.indexOf(value, fromIndex) > -1 : !!length && baseIndexOf(collection, value, fromIndex) > -1;
              }
+             /**
+              * Invokes the method at `path` of each element in `collection`, returning
+              * an array of the results of each invoked method. Any additional arguments
+              * are provided to each invoked method. If `path` is a function, it's invoked
+              * for, and `this` bound to, each element in `collection`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Array|Function|string} path The path of the method to invoke or
+              *  the function invoked per iteration.
+              * @param {...*} [args] The arguments to invoke each method with.
+              * @returns {Array} Returns the array of results.
+              * @example
+              *
+              * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
+              * // => [[1, 5, 7], [1, 2, 3]]
+              *
+              * _.invokeMap([123, 456], String.prototype.split, '');
+              * // => [['1', '2', '3'], ['4', '5', '6']]
+              */
 
-             return false;
-           }
 
-           function incompleteRelation(id) {
-             var entity = context.entity(id);
-             return entity.type === 'relation' && !entity.isComplete(context.graph());
-           }
-         };
+             var invokeMap = baseRest(function (collection, path, args) {
+               var index = -1,
+                   isFunc = typeof path == 'function',
+                   result = isArrayLike(collection) ? Array(collection.length) : [];
+               baseEach(collection, function (value) {
+                 result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
+               });
+               return result;
+             });
+             /**
+              * Creates an object composed of keys generated from the results of running
+              * each element of `collection` thru `iteratee`. The corresponding value of
+              * each key is the last element responsible for generating the key. The
+              * iteratee is invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
+              * @returns {Object} Returns the composed aggregate object.
+              * @example
+              *
+              * var array = [
+              *   { 'dir': 'left', 'code': 97 },
+              *   { 'dir': 'right', 'code': 100 }
+              * ];
+              *
+              * _.keyBy(array, function(o) {
+              *   return String.fromCharCode(o.code);
+              * });
+              * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
+              *
+              * _.keyBy(array, 'dir');
+              * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
+              */
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
-         };
+             var keyBy = createAggregator(function (result, value, key) {
+               baseAssignValue(result, key, value);
+             });
+             /**
+              * Creates an array of values by running each element in `collection` thru
+              * `iteratee`. The iteratee is invoked with three arguments:
+              * (value, index|key, collection).
+              *
+              * Many lodash methods are guarded to work as iteratees for methods like
+              * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
+              *
+              * The guarded methods are:
+              * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
+              * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
+              * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
+              * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the new mapped array.
+              * @example
+              *
+              * function square(n) {
+              *   return n * n;
+              * }
+              *
+              * _.map([4, 8], square);
+              * // => [16, 64]
+              *
+              * _.map({ 'a': 4, 'b': 8 }, square);
+              * // => [16, 64] (iteration order is not guaranteed)
+              *
+              * var users = [
+              *   { 'user': 'barney' },
+              *   { 'user': 'fred' }
+              * ];
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.map(users, 'user');
+              * // => ['barney', 'fred']
+              */
 
-         operation.annotation = function () {
-           return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
-             n: selectedIDs.length
-           });
-         };
+             function map(collection, iteratee) {
+               var func = isArray(collection) ? arrayMap : baseMap;
+               return func(collection, getIteratee(iteratee, 3));
+             }
+             /**
+              * This method is like `_.sortBy` except that it allows specifying the sort
+              * orders of the iteratees to sort by. If `orders` is unspecified, all values
+              * are sorted in ascending order. Otherwise, specify an order of "desc" for
+              * descending or "asc" for ascending sort order of corresponding values.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
+              *  The iteratees to sort by.
+              * @param {string[]} [orders] The sort orders of `iteratees`.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
+              * @returns {Array} Returns the new sorted array.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'fred',   'age': 48 },
+              *   { 'user': 'barney', 'age': 34 },
+              *   { 'user': 'fred',   'age': 40 },
+              *   { 'user': 'barney', 'age': 36 }
+              * ];
+              *
+              * // Sort by `user` in ascending order and by `age` in descending order.
+              * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
+              * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
+              */
 
-         operation.id = 'rotate';
-         operation.keys = [_t('operations.rotate.key')];
-         operation.title = _t('operations.rotate.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         operation.mouseOnly = true;
-         return operation;
-       }
 
-       function modeMove(context, entityIDs, baseGraph) {
-         var mode = {
-           id: 'move',
-           button: 'browse'
-         };
-         var keybinding = utilKeybinding('move');
-         var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior, operationRotate(context, entityIDs).behavior];
-         var annotation = entityIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.move.annotation.feature', {
-           n: entityIDs.length
-         });
+             function orderBy(collection, iteratees, orders, guard) {
+               if (collection == null) {
+                 return [];
+               }
 
-         var _prevGraph;
+               if (!isArray(iteratees)) {
+                 iteratees = iteratees == null ? [] : [iteratees];
+               }
 
-         var _cache;
+               orders = guard ? undefined$1 : orders;
 
-         var _origin;
+               if (!isArray(orders)) {
+                 orders = orders == null ? [] : [orders];
+               }
 
-         var _nudgeInterval;
+               return baseOrderBy(collection, iteratees, orders);
+             }
+             /**
+              * Creates an array of elements split into two groups, the first of which
+              * contains elements `predicate` returns truthy for, the second of which
+              * contains elements `predicate` returns falsey for. The predicate is
+              * invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the array of grouped elements.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney',  'age': 36, 'active': false },
+              *   { 'user': 'fred',    'age': 40, 'active': true },
+              *   { 'user': 'pebbles', 'age': 1,  'active': false }
+              * ];
+              *
+              * _.partition(users, function(o) { return o.active; });
+              * // => objects for [['fred'], ['barney', 'pebbles']]
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.partition(users, { 'age': 1, 'active': false });
+              * // => objects for [['pebbles'], ['barney', 'fred']]
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.partition(users, ['active', false]);
+              * // => objects for [['barney', 'pebbles'], ['fred']]
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.partition(users, 'active');
+              * // => objects for [['fred'], ['barney', 'pebbles']]
+              */
 
-         function doMove(nudge) {
-           nudge = nudge || [0, 0];
-           var fn;
 
-           if (_prevGraph !== context.graph()) {
-             _cache = {};
-             _origin = context.map().mouseCoordinates();
-             fn = context.perform;
-           } else {
-             fn = context.overwrite;
-           }
+             var partition = createAggregator(function (result, value, key) {
+               result[key ? 0 : 1].push(value);
+             }, function () {
+               return [[], []];
+             });
+             /**
+              * Reduces `collection` to a value which is the accumulated result of running
+              * each element in `collection` thru `iteratee`, where each successive
+              * invocation is supplied the return value of the previous. If `accumulator`
+              * is not given, the first element of `collection` is used as the initial
+              * value. The iteratee is invoked with four arguments:
+              * (accumulator, value, index|key, collection).
+              *
+              * Many lodash methods are guarded to work as iteratees for methods like
+              * `_.reduce`, `_.reduceRight`, and `_.transform`.
+              *
+              * The guarded methods are:
+              * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
+              * and `sortBy`
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @param {*} [accumulator] The initial value.
+              * @returns {*} Returns the accumulated value.
+              * @see _.reduceRight
+              * @example
+              *
+              * _.reduce([1, 2], function(sum, n) {
+              *   return sum + n;
+              * }, 0);
+              * // => 3
+              *
+              * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+              *   (result[value] || (result[value] = [])).push(key);
+              *   return result;
+              * }, {});
+              * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
+              */
 
-           var currMouse = context.map().mouse();
-           var origMouse = context.projection(_origin);
-           var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
-           fn(actionMove(entityIDs, delta, context.projection, _cache));
-           _prevGraph = context.graph();
-         }
+             function reduce(collection, iteratee, accumulator) {
+               var func = isArray(collection) ? arrayReduce : baseReduce,
+                   initAccum = arguments.length < 3;
+               return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
+             }
+             /**
+              * This method is like `_.reduce` except that it iterates over elements of
+              * `collection` from right to left.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @param {*} [accumulator] The initial value.
+              * @returns {*} Returns the accumulated value.
+              * @see _.reduce
+              * @example
+              *
+              * var array = [[0, 1], [2, 3], [4, 5]];
+              *
+              * _.reduceRight(array, function(flattened, other) {
+              *   return flattened.concat(other);
+              * }, []);
+              * // => [4, 5, 2, 3, 0, 1]
+              */
 
-         function startNudge(nudge) {
-           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
-           _nudgeInterval = window.setInterval(function () {
-             context.map().pan(nudge);
-             doMove(nudge);
-           }, 50);
-         }
 
-         function stopNudge() {
-           if (_nudgeInterval) {
-             window.clearInterval(_nudgeInterval);
-             _nudgeInterval = null;
-           }
-         }
+             function reduceRight(collection, iteratee, accumulator) {
+               var func = isArray(collection) ? arrayReduceRight : baseReduce,
+                   initAccum = arguments.length < 3;
+               return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
+             }
+             /**
+              * The opposite of `_.filter`; this method returns the elements of `collection`
+              * that `predicate` does **not** return truthy for.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the new filtered array.
+              * @see _.filter
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney', 'age': 36, 'active': false },
+              *   { 'user': 'fred',   'age': 40, 'active': true }
+              * ];
+              *
+              * _.reject(users, function(o) { return !o.active; });
+              * // => objects for ['fred']
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.reject(users, { 'age': 40, 'active': true });
+              * // => objects for ['barney']
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.reject(users, ['active', false]);
+              * // => objects for ['fred']
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.reject(users, 'active');
+              * // => objects for ['barney']
+              */
 
-         function move() {
-           doMove();
-           var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
 
-           if (nudge) {
-             startNudge(nudge);
-           } else {
-             stopNudge();
-           }
-         }
+             function reject(collection, predicate) {
+               var func = isArray(collection) ? arrayFilter : baseFilter;
+               return func(collection, negate(getIteratee(predicate, 3)));
+             }
+             /**
+              * Gets a random element from `collection`.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to sample.
+              * @returns {*} Returns the random element.
+              * @example
+              *
+              * _.sample([1, 2, 3, 4]);
+              * // => 2
+              */
 
-         function finish(d3_event) {
-           d3_event.stopPropagation();
-           context.replace(actionNoop(), annotation);
-           context.enter(modeSelect(context, entityIDs));
-           stopNudge();
-         }
 
-         function cancel() {
-           if (baseGraph) {
-             while (context.graph() !== baseGraph) {
-               context.pop();
+             function sample(collection) {
+               var func = isArray(collection) ? arraySample : baseSample;
+               return func(collection);
              }
+             /**
+              * Gets `n` random elements at unique keys from `collection` up to the
+              * size of `collection`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to sample.
+              * @param {number} [n=1] The number of elements to sample.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Array} Returns the random elements.
+              * @example
+              *
+              * _.sampleSize([1, 2, 3], 2);
+              * // => [3, 1]
+              *
+              * _.sampleSize([1, 2, 3], 4);
+              * // => [2, 3, 1]
+              */
 
-             context.enter(modeBrowse(context));
-           } else {
-             context.pop();
-             context.enter(modeSelect(context, entityIDs));
-           }
 
-           stopNudge();
-         }
+             function sampleSize(collection, n, guard) {
+               if (guard ? isIterateeCall(collection, n, guard) : n === undefined$1) {
+                 n = 1;
+               } else {
+                 n = toInteger(n);
+               }
 
-         function undone() {
-           context.enter(modeBrowse(context));
-         }
+               var func = isArray(collection) ? arraySampleSize : baseSampleSize;
+               return func(collection, n);
+             }
+             /**
+              * Creates an array of shuffled values, using a version of the
+              * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to shuffle.
+              * @returns {Array} Returns the new shuffled array.
+              * @example
+              *
+              * _.shuffle([1, 2, 3, 4]);
+              * // => [4, 1, 3, 2]
+              */
 
-         mode.enter = function () {
-           _origin = context.map().mouseCoordinates();
-           _prevGraph = null;
-           _cache = {};
-           context.features().forceVisible(entityIDs);
-           behaviors.forEach(context.install);
-           context.surface().on('mousemove.move', move).on('click.move', finish);
-           context.history().on('undone.move', undone);
-           keybinding.on('⎋', cancel).on('↩', finish);
-           select(document).call(keybinding);
-         };
 
-         mode.exit = function () {
-           stopNudge();
-           behaviors.forEach(function (behavior) {
-             context.uninstall(behavior);
-           });
-           context.surface().on('mousemove.move', null).on('click.move', null);
-           context.history().on('undone.move', null);
-           select(document).call(keybinding.unbind);
-           context.features().forceVisible([]);
-         };
+             function shuffle(collection) {
+               var func = isArray(collection) ? arrayShuffle : baseShuffle;
+               return func(collection);
+             }
+             /**
+              * Gets the size of `collection` by returning its length for array-like
+              * values or the number of own enumerable string keyed properties for objects.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object|string} collection The collection to inspect.
+              * @returns {number} Returns the collection size.
+              * @example
+              *
+              * _.size([1, 2, 3]);
+              * // => 3
+              *
+              * _.size({ 'a': 1, 'b': 2 });
+              * // => 2
+              *
+              * _.size('pebbles');
+              * // => 7
+              */
 
-         mode.selectedIDs = function () {
-           if (!arguments.length) return entityIDs; // no assign
 
-           return mode;
-         };
+             function size(collection) {
+               if (collection == null) {
+                 return 0;
+               }
 
-         return mode;
-       }
+               if (isArrayLike(collection)) {
+                 return isString(collection) ? stringSize(collection) : collection.length;
+               }
 
-       function behaviorPaste(context) {
-         function doPaste(d3_event) {
-           // prevent paste during low zoom selection
-           if (!context.map().withinEditableZoom()) return;
-           d3_event.preventDefault();
-           var baseGraph = context.graph();
-           var mouse = context.map().mouse();
-           var projection = context.projection;
-           var viewport = geoExtent(projection.clipExtent()).polygon();
-           if (!geoPointInPolygon(mouse, viewport)) return;
-           var oldIDs = context.copyIDs();
-           if (!oldIDs.length) return;
-           var extent = geoExtent();
-           var oldGraph = context.copyGraph();
-           var newIDs = [];
-           var action = actionCopyEntities(oldIDs, oldGraph);
-           context.perform(action);
-           var copies = action.copies();
-           var originals = new Set();
-           Object.values(copies).forEach(function (entity) {
-             originals.add(entity.id);
-           });
+               var tag = getTag(collection);
 
-           for (var id in copies) {
-             var oldEntity = oldGraph.entity(id);
-             var newEntity = copies[id];
+               if (tag == mapTag || tag == setTag) {
+                 return collection.size;
+               }
 
-             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
+               return baseKeys(collection).length;
+             }
+             /**
+              * Checks if `predicate` returns truthy for **any** element of `collection`.
+              * Iteration is stopped once `predicate` returns truthy. The predicate is
+              * invoked with three arguments: (value, index|key, collection).
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {boolean} Returns `true` if any element passes the predicate check,
+              *  else `false`.
+              * @example
+              *
+              * _.some([null, 0, 'yes', false], Boolean);
+              * // => true
+              *
+              * var users = [
+              *   { 'user': 'barney', 'active': true },
+              *   { 'user': 'fred',   'active': false }
+              * ];
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.some(users, { 'user': 'barney', 'active': false });
+              * // => false
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.some(users, ['active', false]);
+              * // => true
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.some(users, 'active');
+              * // => true
+              */
 
 
-             var parents = context.graph().parentWays(newEntity);
-             var parentCopied = parents.some(function (parent) {
-               return originals.has(parent.id);
-             });
+             function some(collection, predicate, guard) {
+               var func = isArray(collection) ? arraySome : baseSome;
 
-             if (!parentCopied) {
-               newIDs.push(newEntity.id);
+               if (guard && isIterateeCall(collection, predicate, guard)) {
+                 predicate = undefined$1;
+               }
+
+               return func(collection, getIteratee(predicate, 3));
              }
-           } // Put pasted objects where mouse pointer is..
+             /**
+              * Creates an array of elements, sorted in ascending order by the results of
+              * running each element in a collection thru each iteratee. This method
+              * performs a stable sort, that is, it preserves the original sort order of
+              * equal elements. The iteratees are invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Collection
+              * @param {Array|Object} collection The collection to iterate over.
+              * @param {...(Function|Function[])} [iteratees=[_.identity]]
+              *  The iteratees to sort by.
+              * @returns {Array} Returns the new sorted array.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'fred',   'age': 48 },
+              *   { 'user': 'barney', 'age': 36 },
+              *   { 'user': 'fred',   'age': 30 },
+              *   { 'user': 'barney', 'age': 34 }
+              * ];
+              *
+              * _.sortBy(users, [function(o) { return o.user; }]);
+              * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 30]]
+              *
+              * _.sortBy(users, ['user', 'age']);
+              * // => objects for [['barney', 34], ['barney', 36], ['fred', 30], ['fred', 48]]
+              */
 
 
-           var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
-           var delta = geoVecSubtract(mouse, copyPoint);
-           context.perform(actionMove(newIDs, delta, projection));
-           context.enter(modeMove(context, newIDs, baseGraph));
-         }
+             var sortBy = baseRest(function (collection, iteratees) {
+               if (collection == null) {
+                 return [];
+               }
 
-         function behavior() {
-           context.keybinding().on(uiCmd('⌘V'), doPaste);
-           return behavior;
-         }
+               var length = iteratees.length;
 
-         behavior.off = function () {
-           context.keybinding().off(uiCmd('⌘V'));
-         };
+               if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
+                 iteratees = [];
+               } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
+                 iteratees = [iteratees[0]];
+               }
 
-         return behavior;
-       }
+               return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
+             });
+             /*------------------------------------------------------------------------*/
 
-       // `String.prototype.repeat` method
-       // https://tc39.github.io/ecma262/#sec-string.prototype.repeat
-       _export({ target: 'String', proto: true }, {
-         repeat: stringRepeat
-       });
+             /**
+              * Gets the timestamp of the number of milliseconds that have elapsed since
+              * the Unix epoch (1 January 1970 00:00:00 UTC).
+              *
+              * @static
+              * @memberOf _
+              * @since 2.4.0
+              * @category Date
+              * @returns {number} Returns the timestamp.
+              * @example
+              *
+              * _.defer(function(stamp) {
+              *   console.log(_.now() - stamp);
+              * }, _.now());
+              * // => Logs the number of milliseconds it took for the deferred invocation.
+              */
 
-       /*
-           `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
+             var now = ctxNow || function () {
+               return root.Date.now();
+             };
+             /*------------------------------------------------------------------------*/
 
-           * The `origin` function is expected to return an [x, y] tuple rather than an
-             {x, y} object.
-           * The events are `start`, `move`, and `end`.
-             (https://github.com/mbostock/d3/issues/563)
-           * The `start` event is not dispatched until the first cursor movement occurs.
-             (https://github.com/mbostock/d3/pull/368)
-           * The `move` event has a `point` and `delta` [x, y] tuple properties rather
-             than `x`, `y`, `dx`, and `dy` properties.
-           * The `end` event is not dispatched if no movement occurs.
-           * An `off` function is available that unbinds the drag's internal event handlers.
-        */
+             /**
+              * The opposite of `_.before`; this method creates a function that invokes
+              * `func` once it's called `n` or more times.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Function
+              * @param {number} n The number of calls before `func` is invoked.
+              * @param {Function} func The function to restrict.
+              * @returns {Function} Returns the new restricted function.
+              * @example
+              *
+              * var saves = ['profile', 'settings'];
+              *
+              * var done = _.after(saves.length, function() {
+              *   console.log('done saving!');
+              * });
+              *
+              * _.forEach(saves, function(type) {
+              *   asyncSave({ 'type': type, 'complete': done });
+              * });
+              * // => Logs 'done saving!' after the two async saves have completed.
+              */
 
-       function behaviorDrag() {
-         var dispatch$1 = dispatch('start', 'move', 'end'); // see also behaviorSelect
 
-         var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
+             function after(n, func) {
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-         var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
+               n = toInteger(n);
+               return function () {
+                 if (--n < 1) {
+                   return func.apply(this, arguments);
+                 }
+               };
+             }
+             /**
+              * Creates a function that invokes `func`, with up to `n` arguments,
+              * ignoring any additional arguments.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Function
+              * @param {Function} func The function to cap arguments for.
+              * @param {number} [n=func.length] The arity cap.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Function} Returns the new capped function.
+              * @example
+              *
+              * _.map(['6', '8', '10'], _.ary(parseInt, 1));
+              * // => [6, 8, 10]
+              */
 
-         var _origin = null;
-         var _selector = '';
 
-         var _targetNode;
+             function ary(func, n, guard) {
+               n = guard ? undefined$1 : n;
+               n = func && n == null ? func.length : n;
+               return createWrap(func, WRAP_ARY_FLAG, undefined$1, undefined$1, undefined$1, undefined$1, n);
+             }
+             /**
+              * Creates a function that invokes `func`, with the `this` binding and arguments
+              * of the created function, while it's called less than `n` times. Subsequent
+              * calls to the created function return the result of the last `func` invocation.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Function
+              * @param {number} n The number of calls at which `func` is no longer invoked.
+              * @param {Function} func The function to restrict.
+              * @returns {Function} Returns the new restricted function.
+              * @example
+              *
+              * jQuery(element).on('click', _.before(5, addContactToList));
+              * // => Allows adding up to 4 contacts to the list.
+              */
 
-         var _targetEntity;
 
-         var _surface;
+             function before(n, func) {
+               var result;
 
-         var _pointerId; // use pointer events on supported platforms; fallback to mouse events
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
+               n = toInteger(n);
+               return function () {
+                 if (--n > 0) {
+                   result = func.apply(this, arguments);
+                 }
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+                 if (n <= 1) {
+                   func = undefined$1;
+                 }
 
-         var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
+                 return result;
+               };
+             }
+             /**
+              * Creates a function that invokes `func` with the `this` binding of `thisArg`
+              * and `partials` prepended to the arguments it receives.
+              *
+              * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
+              * may be used as a placeholder for partially applied arguments.
+              *
+              * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
+              * property of bound functions.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Function
+              * @param {Function} func The function to bind.
+              * @param {*} thisArg The `this` binding of `func`.
+              * @param {...*} [partials] The arguments to be partially applied.
+              * @returns {Function} Returns the new bound function.
+              * @example
+              *
+              * function greet(greeting, punctuation) {
+              *   return greeting + ' ' + this.user + punctuation;
+              * }
+              *
+              * var object = { 'user': 'fred' };
+              *
+              * var bound = _.bind(greet, object, 'hi');
+              * bound('!');
+              * // => 'hi fred!'
+              *
+              * // Bound with placeholders.
+              * var bound = _.bind(greet, object, _, '!');
+              * bound('hi');
+              * // => 'hi fred!'
+              */
 
-         var d3_event_userSelectSuppress = function d3_event_userSelectSuppress() {
-           var selection$1 = selection();
-           var select = selection$1.style(d3_event_userSelectProperty);
-           selection$1.style(d3_event_userSelectProperty, 'none');
-           return function () {
-             selection$1.style(d3_event_userSelectProperty, select);
-           };
-         };
 
-         function pointerdown(d3_event) {
-           if (_pointerId) return;
-           _pointerId = d3_event.pointerId || 'mouse';
-           _targetNode = this; // only force reflow once per drag
+             var bind = baseRest(function (func, thisArg, partials) {
+               var bitmask = WRAP_BIND_FLAG;
 
-           var pointerLocGetter = utilFastMouse(_surface || _targetNode.parentNode);
-           var offset;
-           var startOrigin = pointerLocGetter(d3_event);
-           var started = false;
-           var selectEnable = d3_event_userSelectSuppress();
-           select(window).on(_pointerPrefix + 'move.drag', pointermove).on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
+               if (partials.length) {
+                 var holders = replaceHolders(partials, getHolder(bind));
+                 bitmask |= WRAP_PARTIAL_FLAG;
+               }
 
-           if (_origin) {
-             offset = _origin.call(_targetNode, _targetEntity);
-             offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
-           } else {
-             offset = [0, 0];
-           }
+               return createWrap(func, bitmask, thisArg, partials, holders);
+             });
+             /**
+              * Creates a function that invokes the method at `object[key]` with `partials`
+              * prepended to the arguments it receives.
+              *
+              * This method differs from `_.bind` by allowing bound functions to reference
+              * methods that may be redefined or don't yet exist. See
+              * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
+              * for more details.
+              *
+              * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
+              * builds, may be used as a placeholder for partially applied arguments.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.10.0
+              * @category Function
+              * @param {Object} object The object to invoke the method on.
+              * @param {string} key The key of the method.
+              * @param {...*} [partials] The arguments to be partially applied.
+              * @returns {Function} Returns the new bound function.
+              * @example
+              *
+              * var object = {
+              *   'user': 'fred',
+              *   'greet': function(greeting, punctuation) {
+              *     return greeting + ' ' + this.user + punctuation;
+              *   }
+              * };
+              *
+              * var bound = _.bindKey(object, 'greet', 'hi');
+              * bound('!');
+              * // => 'hi fred!'
+              *
+              * object.greet = function(greeting, punctuation) {
+              *   return greeting + 'ya ' + this.user + punctuation;
+              * };
+              *
+              * bound('!');
+              * // => 'hiya fred!'
+              *
+              * // Bound with placeholders.
+              * var bound = _.bindKey(object, 'greet', _, '!');
+              * bound('hi');
+              * // => 'hiya fred!'
+              */
 
-           d3_event.stopPropagation();
+             var bindKey = baseRest(function (object, key, partials) {
+               var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
 
-           function pointermove(d3_event) {
-             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
-             var p = pointerLocGetter(d3_event);
+               if (partials.length) {
+                 var holders = replaceHolders(partials, getHolder(bindKey));
+                 bitmask |= WRAP_PARTIAL_FLAG;
+               }
 
-             if (!started) {
-               var dist = geoVecLength(startOrigin, p);
-               var tolerance = d3_event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx; // don't start until the drag has actually moved somewhat
+               return createWrap(key, bitmask, object, partials, holders);
+             });
+             /**
+              * Creates a function that accepts arguments of `func` and either invokes
+              * `func` returning its result, if at least `arity` number of arguments have
+              * been provided, or returns a function that accepts the remaining `func`
+              * arguments, and so on. The arity of `func` may be specified if `func.length`
+              * is not sufficient.
+              *
+              * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
+              * may be used as a placeholder for provided arguments.
+              *
+              * **Note:** This method doesn't set the "length" property of curried functions.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @category Function
+              * @param {Function} func The function to curry.
+              * @param {number} [arity=func.length] The arity of `func`.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Function} Returns the new curried function.
+              * @example
+              *
+              * var abc = function(a, b, c) {
+              *   return [a, b, c];
+              * };
+              *
+              * var curried = _.curry(abc);
+              *
+              * curried(1)(2)(3);
+              * // => [1, 2, 3]
+              *
+              * curried(1, 2)(3);
+              * // => [1, 2, 3]
+              *
+              * curried(1, 2, 3);
+              * // => [1, 2, 3]
+              *
+              * // Curried with placeholders.
+              * curried(1)(_, 3)(2);
+              * // => [1, 2, 3]
+              */
 
-               if (dist < tolerance) return;
-               started = true;
-               dispatch$1.call('start', this, d3_event, _targetEntity); // Don't send a `move` event in the same cycle as `start` since dragging
-               // a midpoint will convert the target to a node.
-             } else {
-               startOrigin = p;
-               d3_event.stopPropagation();
-               d3_event.preventDefault();
-               var dx = p[0] - startOrigin[0];
-               var dy = p[1] - startOrigin[1];
-               dispatch$1.call('move', this, d3_event, _targetEntity, [p[0] + offset[0], p[1] + offset[1]], [dx, dy]);
+             function curry(func, arity, guard) {
+               arity = guard ? undefined$1 : arity;
+               var result = createWrap(func, WRAP_CURRY_FLAG, undefined$1, undefined$1, undefined$1, undefined$1, undefined$1, arity);
+               result.placeholder = curry.placeholder;
+               return result;
              }
-           }
+             /**
+              * This method is like `_.curry` except that arguments are applied to `func`
+              * in the manner of `_.partialRight` instead of `_.partial`.
+              *
+              * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
+              * builds, may be used as a placeholder for provided arguments.
+              *
+              * **Note:** This method doesn't set the "length" property of curried functions.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Function
+              * @param {Function} func The function to curry.
+              * @param {number} [arity=func.length] The arity of `func`.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Function} Returns the new curried function.
+              * @example
+              *
+              * var abc = function(a, b, c) {
+              *   return [a, b, c];
+              * };
+              *
+              * var curried = _.curryRight(abc);
+              *
+              * curried(3)(2)(1);
+              * // => [1, 2, 3]
+              *
+              * curried(2, 3)(1);
+              * // => [1, 2, 3]
+              *
+              * curried(1, 2, 3);
+              * // => [1, 2, 3]
+              *
+              * // Curried with placeholders.
+              * curried(3)(1, _)(2);
+              * // => [1, 2, 3]
+              */
 
-           function pointerup(d3_event) {
-             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
-             _pointerId = null;
 
-             if (started) {
-               dispatch$1.call('end', this, d3_event, _targetEntity);
-               d3_event.preventDefault();
+             function curryRight(func, arity, guard) {
+               arity = guard ? undefined$1 : arity;
+               var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined$1, undefined$1, undefined$1, undefined$1, undefined$1, arity);
+               result.placeholder = curryRight.placeholder;
+               return result;
              }
+             /**
+              * Creates a debounced function that delays invoking `func` until after `wait`
+              * milliseconds have elapsed since the last time the debounced function was
+              * invoked. The debounced function comes with a `cancel` method to cancel
+              * delayed `func` invocations and a `flush` method to immediately invoke them.
+              * Provide `options` to indicate whether `func` should be invoked on the
+              * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
+              * with the last arguments provided to the debounced function. Subsequent
+              * calls to the debounced function return the result of the last `func`
+              * invocation.
+              *
+              * **Note:** If `leading` and `trailing` options are `true`, `func` is
+              * invoked on the trailing edge of the timeout only if the debounced function
+              * is invoked more than once during the `wait` timeout.
+              *
+              * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+              * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+              *
+              * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+              * for details over the differences between `_.debounce` and `_.throttle`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Function
+              * @param {Function} func The function to debounce.
+              * @param {number} [wait=0] The number of milliseconds to delay.
+              * @param {Object} [options={}] The options object.
+              * @param {boolean} [options.leading=false]
+              *  Specify invoking on the leading edge of the timeout.
+              * @param {number} [options.maxWait]
+              *  The maximum time `func` is allowed to be delayed before it's invoked.
+              * @param {boolean} [options.trailing=true]
+              *  Specify invoking on the trailing edge of the timeout.
+              * @returns {Function} Returns the new debounced function.
+              * @example
+              *
+              * // Avoid costly calculations while the window size is in flux.
+              * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
+              *
+              * // Invoke `sendMail` when clicked, debouncing subsequent calls.
+              * jQuery(element).on('click', _.debounce(sendMail, 300, {
+              *   'leading': true,
+              *   'trailing': false
+              * }));
+              *
+              * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
+              * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
+              * var source = new EventSource('/stream');
+              * jQuery(source).on('message', debounced);
+              *
+              * // Cancel the trailing debounced invocation.
+              * jQuery(window).on('popstate', debounced.cancel);
+              */
 
-             select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-             selectEnable();
-           }
-         }
 
-         function behavior(selection) {
-           var matchesSelector = utilPrefixDOMProperty('matchesSelector');
-           var delegate = pointerdown;
+             function debounce(func, wait, options) {
+               var lastArgs,
+                   lastThis,
+                   maxWait,
+                   result,
+                   timerId,
+                   lastCallTime,
+                   lastInvokeTime = 0,
+                   leading = false,
+                   maxing = false,
+                   trailing = true;
 
-           if (_selector) {
-             delegate = function delegate(d3_event) {
-               var root = this;
-               var target = d3_event.target;
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-               for (; target && target !== root; target = target.parentNode) {
-                 var datum = target.__data__;
-                 _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
+               wait = toNumber(wait) || 0;
 
-                 if (_targetEntity && target[matchesSelector](_selector)) {
-                   return pointerdown.call(target, d3_event);
-                 }
+               if (isObject(options)) {
+                 leading = !!options.leading;
+                 maxing = 'maxWait' in options;
+                 maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
+                 trailing = 'trailing' in options ? !!options.trailing : trailing;
                }
-             };
-           }
 
-           selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
-         }
+               function invokeFunc(time) {
+                 var args = lastArgs,
+                     thisArg = lastThis;
+                 lastArgs = lastThis = undefined$1;
+                 lastInvokeTime = time;
+                 result = func.apply(thisArg, args);
+                 return result;
+               }
 
-         behavior.off = function (selection) {
-           selection.on(_pointerPrefix + 'down.drag' + _selector, null);
-         };
+               function leadingEdge(time) {
+                 // Reset any `maxWait` timer.
+                 lastInvokeTime = time; // Start the timer for the trailing edge.
 
-         behavior.selector = function (_) {
-           if (!arguments.length) return _selector;
-           _selector = _;
-           return behavior;
-         };
+                 timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
 
-         behavior.origin = function (_) {
-           if (!arguments.length) return _origin;
-           _origin = _;
-           return behavior;
-         };
+                 return leading ? invokeFunc(time) : result;
+               }
 
-         behavior.cancel = function () {
-           select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
-           return behavior;
-         };
+               function remainingWait(time) {
+                 var timeSinceLastCall = time - lastCallTime,
+                     timeSinceLastInvoke = time - lastInvokeTime,
+                     timeWaiting = wait - timeSinceLastCall;
+                 return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+               }
 
-         behavior.targetNode = function (_) {
-           if (!arguments.length) return _targetNode;
-           _targetNode = _;
-           return behavior;
-         };
+               function shouldInvoke(time) {
+                 var timeSinceLastCall = time - lastCallTime,
+                     timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
+                 // trailing edge, the system time has gone backwards and we're treating
+                 // it as the trailing edge, or we've hit the `maxWait` limit.
 
-         behavior.targetEntity = function (_) {
-           if (!arguments.length) return _targetEntity;
-           _targetEntity = _;
-           return behavior;
-         };
+                 return lastCallTime === undefined$1 || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+               }
 
-         behavior.surface = function (_) {
-           if (!arguments.length) return _surface;
-           _surface = _;
-           return behavior;
-         };
+               function timerExpired() {
+                 var time = now();
 
-         return utilRebind(behavior, dispatch$1, 'on');
-       }
+                 if (shouldInvoke(time)) {
+                   return trailingEdge(time);
+                 } // Restart the timer.
 
-       function modeDragNode(context) {
-         var mode = {
-           id: 'drag-node',
-           button: 'browse'
-         };
-         var hover = behaviorHover(context).altDisables(true).on('hover', context.ui().sidebar.hover);
-         var edit = behaviorEdit(context);
 
-         var _nudgeInterval;
+                 timerId = setTimeout(timerExpired, remainingWait(time));
+               }
 
-         var _restoreSelectedIDs = [];
-         var _wasMidpoint = false;
-         var _isCancelled = false;
+               function trailingEdge(time) {
+                 timerId = undefined$1; // Only invoke if we have `lastArgs` which means `func` has been
+                 // debounced at least once.
 
-         var _activeEntity;
+                 if (trailing && lastArgs) {
+                   return invokeFunc(time);
+                 }
 
-         var _startLoc;
+                 lastArgs = lastThis = undefined$1;
+                 return result;
+               }
 
-         var _lastLoc;
+               function cancel() {
+                 if (timerId !== undefined$1) {
+                   clearTimeout(timerId);
+                 }
 
-         function startNudge(d3_event, entity, nudge) {
-           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
-           _nudgeInterval = window.setInterval(function () {
-             context.map().pan(nudge);
-             doMove(d3_event, entity, nudge);
-           }, 50);
-         }
+                 lastInvokeTime = 0;
+                 lastArgs = lastCallTime = lastThis = timerId = undefined$1;
+               }
 
-         function stopNudge() {
-           if (_nudgeInterval) {
-             window.clearInterval(_nudgeInterval);
-             _nudgeInterval = null;
-           }
-         }
+               function flush() {
+                 return timerId === undefined$1 ? result : trailingEdge(now());
+               }
 
-         function moveAnnotation(entity) {
-           return _t('operations.move.annotation.' + entity.geometry(context.graph()));
-         }
+               function debounced() {
+                 var time = now(),
+                     isInvoking = shouldInvoke(time);
+                 lastArgs = arguments;
+                 lastThis = this;
+                 lastCallTime = time;
 
-         function connectAnnotation(nodeEntity, targetEntity) {
-           var nodeGeometry = nodeEntity.geometry(context.graph());
-           var targetGeometry = targetEntity.geometry(context.graph());
+                 if (isInvoking) {
+                   if (timerId === undefined$1) {
+                     return leadingEdge(lastCallTime);
+                   }
 
-           if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
-             var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
-             var targetParentWayIDs = context.graph().parentWays(targetEntity);
-             var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs); // if both vertices are part of the same way
+                   if (maxing) {
+                     // Handle invocations in a tight loop.
+                     clearTimeout(timerId);
+                     timerId = setTimeout(timerExpired, wait);
+                     return invokeFunc(lastCallTime);
+                   }
+                 }
 
-             if (sharedParentWays.length !== 0) {
-               // if the nodes are next to each other, they are merged
-               if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
-                 return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
+                 if (timerId === undefined$1) {
+                   timerId = setTimeout(timerExpired, wait);
+                 }
+
+                 return result;
                }
 
-               return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+               debounced.cancel = cancel;
+               debounced.flush = flush;
+               return debounced;
              }
-           }
+             /**
+              * Defers invoking the `func` until the current call stack has cleared. Any
+              * additional arguments are provided to `func` when it's invoked.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Function
+              * @param {Function} func The function to defer.
+              * @param {...*} [args] The arguments to invoke `func` with.
+              * @returns {number} Returns the timer id.
+              * @example
+              *
+              * _.defer(function(text) {
+              *   console.log(text);
+              * }, 'deferred');
+              * // => Logs 'deferred' after one millisecond.
+              */
 
-           return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
-         }
 
-         function shouldSnapToNode(target) {
-           if (!_activeEntity) return false;
-           return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
-         }
+             var defer = baseRest(function (func, args) {
+               return baseDelay(func, 1, args);
+             });
+             /**
+              * Invokes `func` after `wait` milliseconds. Any additional arguments are
+              * provided to `func` when it's invoked.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Function
+              * @param {Function} func The function to delay.
+              * @param {number} wait The number of milliseconds to delay invocation.
+              * @param {...*} [args] The arguments to invoke `func` with.
+              * @returns {number} Returns the timer id.
+              * @example
+              *
+              * _.delay(function(text) {
+              *   console.log(text);
+              * }, 1000, 'later');
+              * // => Logs 'later' after one second.
+              */
+
+             var delay = baseRest(function (func, wait, args) {
+               return baseDelay(func, toNumber(wait) || 0, args);
+             });
+             /**
+              * Creates a function that invokes `func` with arguments reversed.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Function
+              * @param {Function} func The function to flip arguments for.
+              * @returns {Function} Returns the new flipped function.
+              * @example
+              *
+              * var flipped = _.flip(function() {
+              *   return _.toArray(arguments);
+              * });
+              *
+              * flipped('a', 'b', 'c', 'd');
+              * // => ['d', 'c', 'b', 'a']
+              */
+
+             function flip(func) {
+               return createWrap(func, WRAP_FLIP_FLAG);
+             }
+             /**
+              * Creates a function that memoizes the result of `func`. If `resolver` is
+              * provided, it determines the cache key for storing the result based on the
+              * arguments provided to the memoized function. By default, the first argument
+              * provided to the memoized function is used as the map cache key. The `func`
+              * is invoked with the `this` binding of the memoized function.
+              *
+              * **Note:** The cache is exposed as the `cache` property on the memoized
+              * function. Its creation may be customized by replacing the `_.memoize.Cache`
+              * constructor with one whose instances implement the
+              * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
+              * method interface of `clear`, `delete`, `get`, `has`, and `set`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Function
+              * @param {Function} func The function to have its output memoized.
+              * @param {Function} [resolver] The function to resolve the cache key.
+              * @returns {Function} Returns the new memoized function.
+              * @example
+              *
+              * var object = { 'a': 1, 'b': 2 };
+              * var other = { 'c': 3, 'd': 4 };
+              *
+              * var values = _.memoize(_.values);
+              * values(object);
+              * // => [1, 2]
+              *
+              * values(other);
+              * // => [3, 4]
+              *
+              * object.a = 2;
+              * values(object);
+              * // => [1, 2]
+              *
+              * // Modify the result cache.
+              * values.cache.set(object, ['a', 'b']);
+              * values(object);
+              * // => ['a', 'b']
+              *
+              * // Replace `_.memoize.Cache`.
+              * _.memoize.Cache = WeakMap;
+              */
 
-         function origin(entity) {
-           return context.projection(entity.loc);
-         }
 
-         function keydown(d3_event) {
-           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             if (context.surface().classed('nope')) {
-               context.surface().classed('nope-suppressed', true);
-             }
+             function memoize(func, resolver) {
+               if (typeof func != 'function' || resolver != null && typeof resolver != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-             context.surface().classed('nope', false).classed('nope-disabled', true);
-           }
-         }
+               var memoized = function memoized() {
+                 var args = arguments,
+                     key = resolver ? resolver.apply(this, args) : args[0],
+                     cache = memoized.cache;
 
-         function keyup(d3_event) {
-           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             if (context.surface().classed('nope-suppressed')) {
-               context.surface().classed('nope', true);
-             }
+                 if (cache.has(key)) {
+                   return cache.get(key);
+                 }
 
-             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
-           }
-         }
+                 var result = func.apply(this, args);
+                 memoized.cache = cache.set(key, result) || cache;
+                 return result;
+               };
 
-         function start(d3_event, entity) {
-           _wasMidpoint = entity.type === 'midpoint';
-           var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
-           _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
+               memoized.cache = new (memoize.Cache || MapCache)();
+               return memoized;
+             } // Expose `MapCache`.
 
-           if (_isCancelled) {
-             if (hasHidden) {
-               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
-             }
 
-             return drag.cancel();
-           }
+             memoize.Cache = MapCache;
+             /**
+              * Creates a function that negates the result of the predicate `func`. The
+              * `func` predicate is invoked with the `this` binding and arguments of the
+              * created function.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Function
+              * @param {Function} predicate The predicate to negate.
+              * @returns {Function} Returns the new negated function.
+              * @example
+              *
+              * function isEven(n) {
+              *   return n % 2 == 0;
+              * }
+              *
+              * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
+              * // => [1, 3, 5]
+              */
 
-           if (_wasMidpoint) {
-             var midpoint = entity;
-             entity = osmNode();
-             context.perform(actionAddMidpoint(midpoint, entity));
-             entity = context.entity(entity.id); // get post-action entity
+             function negate(predicate) {
+               if (typeof predicate != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-             var vertex = context.surface().selectAll('.' + entity.id);
-             drag.targetNode(vertex.node()).targetEntity(entity);
-           } else {
-             context.perform(actionNoop());
-           }
+               return function () {
+                 var args = arguments;
 
-           _activeEntity = entity;
-           _startLoc = entity.loc;
-           hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
-           context.surface().selectAll('.' + _activeEntity.id).classed('active', true);
-           context.enter(mode);
-         } // related code
-         // - `behavior/draw.js` `datum()`
+                 switch (args.length) {
+                   case 0:
+                     return !predicate.call(this);
 
+                   case 1:
+                     return !predicate.call(this, args[0]);
 
-         function datum(d3_event) {
-           if (!d3_event || d3_event.altKey) {
-             return {};
-           } else {
-             // When dragging, snap only to touch targets..
-             // (this excludes area fills and active drawing elements)
-             var d = d3_event.target.__data__;
-             return d && d.properties && d.properties.target ? d : {};
-           }
-         }
+                   case 2:
+                     return !predicate.call(this, args[0], args[1]);
 
-         function doMove(d3_event, entity, nudge) {
-           nudge = nudge || [0, 0];
-           var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
-           var currMouse = geoVecSubtract(currPoint, nudge);
-           var loc = context.projection.invert(currMouse);
-           var target, edge;
+                   case 3:
+                     return !predicate.call(this, args[0], args[1], args[2]);
+                 }
 
-           if (!_nudgeInterval) {
-             // If not nudging at the edge of the viewport, try to snap..
-             // related code
-             // - `mode/drag_node.js`     `doMove()`
-             // - `behavior/draw.js`      `click()`
-             // - `behavior/draw_way.js`  `move()`
-             var d = datum(d3_event);
-             target = d && d.properties && d.properties.entity;
-             var targetLoc = target && target.loc;
-             var targetNodes = d && d.properties && d.properties.nodes;
+                 return !predicate.apply(this, args);
+               };
+             }
+             /**
+              * Creates a function that is restricted to invoking `func` once. Repeat calls
+              * to the function return the value of the first invocation. The `func` is
+              * invoked with the `this` binding and arguments of the created function.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Function
+              * @param {Function} func The function to restrict.
+              * @returns {Function} Returns the new restricted function.
+              * @example
+              *
+              * var initialize = _.once(createApplication);
+              * initialize();
+              * initialize();
+              * // => `createApplication` is invoked once
+              */
 
-             if (targetLoc) {
-               // snap to node/vertex - a point target with `.loc`
-               if (shouldSnapToNode(target)) {
-                 loc = targetLoc;
-               }
-             } else if (targetNodes) {
-               // snap to way - a line target with `.nodes`
-               edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
 
-               if (edge) {
-                 loc = edge.loc;
-               }
+             function once(func) {
+               return before(2, func);
              }
-           }
+             /**
+              * Creates a function that invokes `func` with its arguments transformed.
+              *
+              * @static
+              * @since 4.0.0
+              * @memberOf _
+              * @category Function
+              * @param {Function} func The function to wrap.
+              * @param {...(Function|Function[])} [transforms=[_.identity]]
+              *  The argument transforms.
+              * @returns {Function} Returns the new function.
+              * @example
+              *
+              * function doubled(n) {
+              *   return n * 2;
+              * }
+              *
+              * function square(n) {
+              *   return n * n;
+              * }
+              *
+              * var func = _.overArgs(function(x, y) {
+              *   return [x, y];
+              * }, [square, doubled]);
+              *
+              * func(9, 3);
+              * // => [81, 6]
+              *
+              * func(10, 5);
+              * // => [100, 10]
+              */
 
-           context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
 
-           var isInvalid = false; // Check if this connection to `target` could cause relations to break..
+             var overArgs = castRest(function (func, transforms) {
+               transforms = transforms.length == 1 && isArray(transforms[0]) ? arrayMap(transforms[0], baseUnary(getIteratee())) : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
+               var funcsLength = transforms.length;
+               return baseRest(function (args) {
+                 var index = -1,
+                     length = nativeMin(args.length, funcsLength);
 
-           if (target) {
-             isInvalid = hasRelationConflict(entity, target, edge, context.graph());
-           } // Check if this drag causes the geometry to break..
+                 while (++index < length) {
+                   args[index] = transforms[index].call(this, args[index]);
+                 }
 
+                 return apply(func, this, args);
+               });
+             });
+             /**
+              * Creates a function that invokes `func` with `partials` prepended to the
+              * arguments it receives. This method is like `_.bind` except it does **not**
+              * alter the `this` binding.
+              *
+              * The `_.partial.placeholder` value, which defaults to `_` in monolithic
+              * builds, may be used as a placeholder for partially applied arguments.
+              *
+              * **Note:** This method doesn't set the "length" property of partially
+              * applied functions.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.2.0
+              * @category Function
+              * @param {Function} func The function to partially apply arguments to.
+              * @param {...*} [partials] The arguments to be partially applied.
+              * @returns {Function} Returns the new partially applied function.
+              * @example
+              *
+              * function greet(greeting, name) {
+              *   return greeting + ' ' + name;
+              * }
+              *
+              * var sayHelloTo = _.partial(greet, 'hello');
+              * sayHelloTo('fred');
+              * // => 'hello fred'
+              *
+              * // Partially applied with placeholders.
+              * var greetFred = _.partial(greet, _, 'fred');
+              * greetFred('hi');
+              * // => 'hi fred'
+              */
 
-           if (!isInvalid) {
-             isInvalid = hasInvalidGeometry(entity, context.graph());
-           }
+             var partial = baseRest(function (func, partials) {
+               var holders = replaceHolders(partials, getHolder(partial));
+               return createWrap(func, WRAP_PARTIAL_FLAG, undefined$1, partials, holders);
+             });
+             /**
+              * This method is like `_.partial` except that partially applied arguments
+              * are appended to the arguments it receives.
+              *
+              * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
+              * builds, may be used as a placeholder for partially applied arguments.
+              *
+              * **Note:** This method doesn't set the "length" property of partially
+              * applied functions.
+              *
+              * @static
+              * @memberOf _
+              * @since 1.0.0
+              * @category Function
+              * @param {Function} func The function to partially apply arguments to.
+              * @param {...*} [partials] The arguments to be partially applied.
+              * @returns {Function} Returns the new partially applied function.
+              * @example
+              *
+              * function greet(greeting, name) {
+              *   return greeting + ' ' + name;
+              * }
+              *
+              * var greetFred = _.partialRight(greet, 'fred');
+              * greetFred('hi');
+              * // => 'hi fred'
+              *
+              * // Partially applied with placeholders.
+              * var sayHelloTo = _.partialRight(greet, 'hello', _);
+              * sayHelloTo('fred');
+              * // => 'hello fred'
+              */
 
-           var nope = context.surface().classed('nope');
+             var partialRight = baseRest(function (func, partials) {
+               var holders = replaceHolders(partials, getHolder(partialRight));
+               return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined$1, partials, holders);
+             });
+             /**
+              * Creates a function that invokes `func` with arguments arranged according
+              * to the specified `indexes` where the argument value at the first index is
+              * provided as the first argument, the argument value at the second index is
+              * provided as the second argument, and so on.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Function
+              * @param {Function} func The function to rearrange arguments for.
+              * @param {...(number|number[])} indexes The arranged argument indexes.
+              * @returns {Function} Returns the new function.
+              * @example
+              *
+              * var rearged = _.rearg(function(a, b, c) {
+              *   return [a, b, c];
+              * }, [2, 0, 1]);
+              *
+              * rearged('b', 'c', 'a')
+              * // => ['a', 'b', 'c']
+              */
 
-           if (isInvalid === 'relation' || isInvalid === 'restriction') {
-             if (!nope) {
-               // about to nope - show hint
-               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('operations.connect.' + isInvalid, {
-                 relation: _mainPresetIndex.item('type/restriction').name()
-               }))();
-             }
-           } else if (isInvalid) {
-             var errorID = isInvalid === 'line' ? 'lines' : 'areas';
-             context.ui().flash.duration(3000).iconName('#iD-icon-no').label(_t('self_intersection.error.' + errorID))();
-           } else {
-             if (nope) {
-               // about to un-nope, remove hint
-               context.ui().flash.duration(1).label('')();
-             }
-           }
+             var rearg = flatRest(function (func, indexes) {
+               return createWrap(func, WRAP_REARG_FLAG, undefined$1, undefined$1, undefined$1, indexes);
+             });
+             /**
+              * Creates a function that invokes `func` with the `this` binding of the
+              * created function and arguments from `start` and beyond provided as
+              * an array.
+              *
+              * **Note:** This method is based on the
+              * [rest parameter](https://mdn.io/rest_parameters).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Function
+              * @param {Function} func The function to apply a rest parameter to.
+              * @param {number} [start=func.length-1] The start position of the rest parameter.
+              * @returns {Function} Returns the new function.
+              * @example
+              *
+              * var say = _.rest(function(what, names) {
+              *   return what + ' ' + _.initial(names).join(', ') +
+              *     (_.size(names) > 1 ? ', & ' : '') + _.last(names);
+              * });
+              *
+              * say('hello', 'fred', 'barney', 'pebbles');
+              * // => 'hello fred, barney, & pebbles'
+              */
 
-           var nopeDisabled = context.surface().classed('nope-disabled');
+             function rest(func, start) {
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-           if (nopeDisabled) {
-             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
-           } else {
-             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
-           }
+               start = start === undefined$1 ? start : toInteger(start);
+               return baseRest(func, start);
+             }
+             /**
+              * Creates a function that invokes `func` with the `this` binding of the
+              * create function and an array of arguments much like
+              * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
+              *
+              * **Note:** This method is based on the
+              * [spread operator](https://mdn.io/spread_operator).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.2.0
+              * @category Function
+              * @param {Function} func The function to spread arguments over.
+              * @param {number} [start=0] The start position of the spread.
+              * @returns {Function} Returns the new function.
+              * @example
+              *
+              * var say = _.spread(function(who, what) {
+              *   return who + ' says ' + what;
+              * });
+              *
+              * say(['fred', 'hello']);
+              * // => 'fred says hello'
+              *
+              * var numbers = Promise.all([
+              *   Promise.resolve(40),
+              *   Promise.resolve(36)
+              * ]);
+              *
+              * numbers.then(_.spread(function(x, y) {
+              *   return x + y;
+              * }));
+              * // => a Promise of 76
+              */
 
-           _lastLoc = loc;
-         } // Uses `actionConnect.disabled()` to know whether this connection is ok..
 
+             function spread(func, start) {
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-         function hasRelationConflict(entity, target, edge, graph) {
-           var testGraph = graph.update(); // copy
-           // if snapping to way - add midpoint there and consider that the target..
+               start = start == null ? 0 : nativeMax(toInteger(start), 0);
+               return baseRest(function (args) {
+                 var array = args[start],
+                     otherArgs = castSlice(args, 0, start);
 
-           if (edge) {
-             var midpoint = osmNode();
-             var action = actionAddMidpoint({
-               loc: edge.loc,
-               edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
-             }, midpoint);
-             testGraph = action(testGraph);
-             target = midpoint;
-           } // can we connect to it?
+                 if (array) {
+                   arrayPush(otherArgs, array);
+                 }
 
+                 return apply(func, this, otherArgs);
+               });
+             }
+             /**
+              * Creates a throttled function that only invokes `func` at most once per
+              * every `wait` milliseconds. The throttled function comes with a `cancel`
+              * method to cancel delayed `func` invocations and a `flush` method to
+              * immediately invoke them. Provide `options` to indicate whether `func`
+              * should be invoked on the leading and/or trailing edge of the `wait`
+              * timeout. The `func` is invoked with the last arguments provided to the
+              * throttled function. Subsequent calls to the throttled function return the
+              * result of the last `func` invocation.
+              *
+              * **Note:** If `leading` and `trailing` options are `true`, `func` is
+              * invoked on the trailing edge of the timeout only if the throttled function
+              * is invoked more than once during the `wait` timeout.
+              *
+              * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
+              * until to the next tick, similar to `setTimeout` with a timeout of `0`.
+              *
+              * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
+              * for details over the differences between `_.throttle` and `_.debounce`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Function
+              * @param {Function} func The function to throttle.
+              * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
+              * @param {Object} [options={}] The options object.
+              * @param {boolean} [options.leading=true]
+              *  Specify invoking on the leading edge of the timeout.
+              * @param {boolean} [options.trailing=true]
+              *  Specify invoking on the trailing edge of the timeout.
+              * @returns {Function} Returns the new throttled function.
+              * @example
+              *
+              * // Avoid excessively updating the position while scrolling.
+              * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
+              *
+              * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
+              * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
+              * jQuery(element).on('click', throttled);
+              *
+              * // Cancel the trailing throttled invocation.
+              * jQuery(window).on('popstate', throttled.cancel);
+              */
 
-           var ids = [entity.id, target.id];
-           return actionConnect(ids).disabled(testGraph);
-         }
 
-         function hasInvalidGeometry(entity, graph) {
-           var parents = graph.parentWays(entity);
-           var i, j, k;
+             function throttle(func, wait, options) {
+               var leading = true,
+                   trailing = true;
 
-           for (i = 0; i < parents.length; i++) {
-             var parent = parents[i];
-             var nodes = [];
-             var activeIndex = null; // which multipolygon ring contains node being dragged
-             // test any parent multipolygons for valid geometry
+               if (typeof func != 'function') {
+                 throw new TypeError(FUNC_ERROR_TEXT);
+               }
 
-             var relations = graph.parentRelations(parent);
+               if (isObject(options)) {
+                 leading = 'leading' in options ? !!options.leading : leading;
+                 trailing = 'trailing' in options ? !!options.trailing : trailing;
+               }
 
-             for (j = 0; j < relations.length; j++) {
-               if (!relations[j].isMultipolygon()) continue;
-               var rings = osmJoinWays(relations[j].members, graph); // find active ring and test it for self intersections
+               return debounce(func, wait, {
+                 'leading': leading,
+                 'maxWait': wait,
+                 'trailing': trailing
+               });
+             }
+             /**
+              * Creates a function that accepts up to one argument, ignoring any
+              * additional arguments.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Function
+              * @param {Function} func The function to cap arguments for.
+              * @returns {Function} Returns the new capped function.
+              * @example
+              *
+              * _.map(['6', '8', '10'], _.unary(parseInt));
+              * // => [6, 8, 10]
+              */
 
-               for (k = 0; k < rings.length; k++) {
-                 nodes = rings[k].nodes;
 
-                 if (nodes.find(function (n) {
-                   return n.id === entity.id;
-                 })) {
-                   activeIndex = k;
+             function unary(func) {
+               return ary(func, 1);
+             }
+             /**
+              * Creates a function that provides `value` to `wrapper` as its first
+              * argument. Any additional arguments provided to the function are appended
+              * to those provided to the `wrapper`. The wrapper is invoked with the `this`
+              * binding of the created function.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Function
+              * @param {*} value The value to wrap.
+              * @param {Function} [wrapper=identity] The wrapper function.
+              * @returns {Function} Returns the new function.
+              * @example
+              *
+              * var p = _.wrap(_.escape, function(func, text) {
+              *   return '<p>' + func(text) + '</p>';
+              * });
+              *
+              * p('fred, barney, & pebbles');
+              * // => '<p>fred, barney, &amp; pebbles</p>'
+              */
 
-                   if (geoHasSelfIntersections(nodes, entity.id)) {
-                     return 'multipolygonMember';
-                   }
-                 }
 
-                 rings[k].coords = nodes.map(function (n) {
-                   return n.loc;
-                 });
-               } // test active ring for intersections with other rings in the multipolygon
+             function wrap(value, wrapper) {
+               return partial(castFunction(wrapper), value);
+             }
+             /*------------------------------------------------------------------------*/
 
+             /**
+              * Casts `value` as an array if it's not one.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.4.0
+              * @category Lang
+              * @param {*} value The value to inspect.
+              * @returns {Array} Returns the cast array.
+              * @example
+              *
+              * _.castArray(1);
+              * // => [1]
+              *
+              * _.castArray({ 'a': 1 });
+              * // => [{ 'a': 1 }]
+              *
+              * _.castArray('abc');
+              * // => ['abc']
+              *
+              * _.castArray(null);
+              * // => [null]
+              *
+              * _.castArray(undefined);
+              * // => [undefined]
+              *
+              * _.castArray();
+              * // => []
+              *
+              * var array = [1, 2, 3];
+              * console.log(_.castArray(array) === array);
+              * // => true
+              */
 
-               for (k = 0; k < rings.length; k++) {
-                 if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
 
-                 if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
-                   return 'multipolygonRing';
-                 }
+             function castArray() {
+               if (!arguments.length) {
+                 return [];
                }
-             } // If we still haven't tested this node's parent way for self-intersections.
-             // (because it's not a member of a multipolygon), test it now.
 
+               var value = arguments[0];
+               return isArray(value) ? value : [value];
+             }
+             /**
+              * Creates a shallow clone of `value`.
+              *
+              * **Note:** This method is loosely based on the
+              * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
+              * and supports cloning arrays, array buffers, booleans, date objects, maps,
+              * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
+              * arrays. The own enumerable properties of `arguments` objects are cloned
+              * as plain objects. An empty object is returned for uncloneable values such
+              * as error objects, functions, DOM nodes, and WeakMaps.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to clone.
+              * @returns {*} Returns the cloned value.
+              * @see _.cloneDeep
+              * @example
+              *
+              * var objects = [{ 'a': 1 }, { 'b': 2 }];
+              *
+              * var shallow = _.clone(objects);
+              * console.log(shallow[0] === objects[0]);
+              * // => true
+              */
 
-             if (activeIndex === null) {
-               nodes = parent.nodes.map(function (nodeID) {
-                 return graph.entity(nodeID);
-               });
 
-               if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
-                 return parent.geometry(graph);
-               }
+             function clone(value) {
+               return baseClone(value, CLONE_SYMBOLS_FLAG);
              }
-           }
+             /**
+              * This method is like `_.clone` except that it accepts `customizer` which
+              * is invoked to produce the cloned value. If `customizer` returns `undefined`,
+              * cloning is handled by the method instead. The `customizer` is invoked with
+              * up to four arguments; (value [, index|key, object, stack]).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to clone.
+              * @param {Function} [customizer] The function to customize cloning.
+              * @returns {*} Returns the cloned value.
+              * @see _.cloneDeepWith
+              * @example
+              *
+              * function customizer(value) {
+              *   if (_.isElement(value)) {
+              *     return value.cloneNode(false);
+              *   }
+              * }
+              *
+              * var el = _.cloneWith(document.body, customizer);
+              *
+              * console.log(el === document.body);
+              * // => false
+              * console.log(el.nodeName);
+              * // => 'BODY'
+              * console.log(el.childNodes.length);
+              * // => 0
+              */
 
-           return false;
-         }
 
-         function move(d3_event, entity, point) {
-           if (_isCancelled) return;
-           d3_event.stopPropagation();
-           context.surface().classed('nope-disabled', d3_event.altKey);
-           _lastLoc = context.projection.invert(point);
-           doMove(d3_event, entity);
-           var nudge = geoViewportEdge(point, context.map().dimensions());
+             function cloneWith(value, customizer) {
+               customizer = typeof customizer == 'function' ? customizer : undefined$1;
+               return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
+             }
+             /**
+              * This method is like `_.clone` except that it recursively clones `value`.
+              *
+              * @static
+              * @memberOf _
+              * @since 1.0.0
+              * @category Lang
+              * @param {*} value The value to recursively clone.
+              * @returns {*} Returns the deep cloned value.
+              * @see _.clone
+              * @example
+              *
+              * var objects = [{ 'a': 1 }, { 'b': 2 }];
+              *
+              * var deep = _.cloneDeep(objects);
+              * console.log(deep[0] === objects[0]);
+              * // => false
+              */
 
-           if (nudge) {
-             startNudge(d3_event, entity, nudge);
-           } else {
-             stopNudge();
-           }
-         }
 
-         function end(d3_event, entity) {
-           if (_isCancelled) return;
-           var wasPoint = entity.geometry(context.graph()) === 'point';
-           var d = datum(d3_event);
-           var nope = d && d.properties && d.properties.nope || context.surface().classed('nope');
-           var target = d && d.properties && d.properties.entity; // entity to snap to
+             function cloneDeep(value) {
+               return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
+             }
+             /**
+              * This method is like `_.cloneWith` except that it recursively clones `value`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to recursively clone.
+              * @param {Function} [customizer] The function to customize cloning.
+              * @returns {*} Returns the deep cloned value.
+              * @see _.cloneWith
+              * @example
+              *
+              * function customizer(value) {
+              *   if (_.isElement(value)) {
+              *     return value.cloneNode(true);
+              *   }
+              * }
+              *
+              * var el = _.cloneDeepWith(document.body, customizer);
+              *
+              * console.log(el === document.body);
+              * // => false
+              * console.log(el.nodeName);
+              * // => 'BODY'
+              * console.log(el.childNodes.length);
+              * // => 20
+              */
 
-           if (nope) {
-             // bounce back
-             context.perform(_actionBounceBack(entity.id, _startLoc));
-           } else if (target && target.type === 'way') {
-             var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
-             context.replace(actionAddMidpoint({
-               loc: choice.loc,
-               edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
-             }, entity), connectAnnotation(entity, target));
-           } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
-             context.replace(actionConnect([target.id, entity.id]), connectAnnotation(entity, target));
-           } else if (_wasMidpoint) {
-             context.replace(actionNoop(), _t('operations.add.annotation.vertex'));
-           } else {
-             context.replace(actionNoop(), moveAnnotation(entity));
-           }
 
-           if (wasPoint) {
-             context.enter(modeSelect(context, [entity.id]));
-           } else {
-             var reselection = _restoreSelectedIDs.filter(function (id) {
-               return context.graph().hasEntity(id);
-             });
+             function cloneDeepWith(value, customizer) {
+               customizer = typeof customizer == 'function' ? customizer : undefined$1;
+               return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
+             }
+             /**
+              * Checks if `object` conforms to `source` by invoking the predicate
+              * properties of `source` with the corresponding property values of `object`.
+              *
+              * **Note:** This method is equivalent to `_.conforms` when `source` is
+              * partially applied.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.14.0
+              * @category Lang
+              * @param {Object} object The object to inspect.
+              * @param {Object} source The object of property predicates to conform to.
+              * @returns {boolean} Returns `true` if `object` conforms, else `false`.
+              * @example
+              *
+              * var object = { 'a': 1, 'b': 2 };
+              *
+              * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
+              * // => true
+              *
+              * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
+              * // => false
+              */
 
-             if (reselection.length) {
-               context.enter(modeSelect(context, reselection));
-             } else {
-               context.enter(modeBrowse(context));
+
+             function conformsTo(object, source) {
+               return source == null || baseConformsTo(object, source, keys(source));
              }
-           }
-         }
+             /**
+              * Performs a
+              * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
+              * comparison between two values to determine if they are equivalent.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+              * @example
+              *
+              * var object = { 'a': 1 };
+              * var other = { 'a': 1 };
+              *
+              * _.eq(object, object);
+              * // => true
+              *
+              * _.eq(object, other);
+              * // => false
+              *
+              * _.eq('a', 'a');
+              * // => true
+              *
+              * _.eq('a', Object('a'));
+              * // => false
+              *
+              * _.eq(NaN, NaN);
+              * // => true
+              */
 
-         function _actionBounceBack(nodeID, toLoc) {
-           var moveNode = actionMoveNode(nodeID, toLoc);
 
-           var action = function action(graph, t) {
-             // last time through, pop off the bounceback perform.
-             // it will then overwrite the initial perform with a moveNode that does nothing
-             if (t === 1) context.pop();
-             return moveNode(graph, t);
-           };
+             function eq(value, other) {
+               return value === other || value !== value && other !== other;
+             }
+             /**
+              * Checks if `value` is greater than `other`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.9.0
+              * @category Lang
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @returns {boolean} Returns `true` if `value` is greater than `other`,
+              *  else `false`.
+              * @see _.lt
+              * @example
+              *
+              * _.gt(3, 1);
+              * // => true
+              *
+              * _.gt(3, 3);
+              * // => false
+              *
+              * _.gt(1, 3);
+              * // => false
+              */
 
-           action.transitionable = true;
-           return action;
-         }
 
-         function cancel() {
-           drag.cancel();
-           context.enter(modeBrowse(context));
-         }
+             var gt = createRelationalOperation(baseGt);
+             /**
+              * Checks if `value` is greater than or equal to `other`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.9.0
+              * @category Lang
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @returns {boolean} Returns `true` if `value` is greater than or equal to
+              *  `other`, else `false`.
+              * @see _.lte
+              * @example
+              *
+              * _.gte(3, 1);
+              * // => true
+              *
+              * _.gte(3, 3);
+              * // => true
+              *
+              * _.gte(1, 3);
+              * // => false
+              */
 
-         var drag = behaviorDrag().selector('.layer-touch.points .target').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
+             var gte = createRelationalOperation(function (value, other) {
+               return value >= other;
+             });
+             /**
+              * Checks if `value` is likely an `arguments` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is an `arguments` object,
+              *  else `false`.
+              * @example
+              *
+              * _.isArguments(function() { return arguments; }());
+              * // => true
+              *
+              * _.isArguments([1, 2, 3]);
+              * // => false
+              */
 
-         mode.enter = function () {
-           context.install(hover);
-           context.install(edit);
-           select(window).on('keydown.dragNode', keydown).on('keyup.dragNode', keyup);
-           context.history().on('undone.drag-node', cancel);
-         };
+             var isArguments = baseIsArguments(function () {
+               return arguments;
+             }()) ? baseIsArguments : function (value) {
+               return isObjectLike(value) && hasOwnProperty.call(value, 'callee') && !propertyIsEnumerable.call(value, 'callee');
+             };
+             /**
+              * Checks if `value` is classified as an `Array` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is an array, else `false`.
+              * @example
+              *
+              * _.isArray([1, 2, 3]);
+              * // => true
+              *
+              * _.isArray(document.body.children);
+              * // => false
+              *
+              * _.isArray('abc');
+              * // => false
+              *
+              * _.isArray(_.noop);
+              * // => false
+              */
 
-         mode.exit = function () {
-           context.ui().sidebar.hover.cancel();
-           context.uninstall(hover);
-           context.uninstall(edit);
-           select(window).on('keydown.dragNode', null).on('keyup.dragNode', null);
-           context.history().on('undone.drag-node', null);
-           _activeEntity = null;
-           context.surface().classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false).selectAll('.active').classed('active', false);
-           stopNudge();
-         };
+             var isArray = Array.isArray;
+             /**
+              * Checks if `value` is classified as an `ArrayBuffer` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.3.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
+              * @example
+              *
+              * _.isArrayBuffer(new ArrayBuffer(2));
+              * // => true
+              *
+              * _.isArrayBuffer(new Array(2));
+              * // => false
+              */
 
-         mode.selectedIDs = function () {
-           if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
+             var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
+             /**
+              * Checks if `value` is array-like. A value is considered array-like if it's
+              * not a function and has a `value.length` that's an integer greater than or
+              * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
+              * @example
+              *
+              * _.isArrayLike([1, 2, 3]);
+              * // => true
+              *
+              * _.isArrayLike(document.body.children);
+              * // => true
+              *
+              * _.isArrayLike('abc');
+              * // => true
+              *
+              * _.isArrayLike(_.noop);
+              * // => false
+              */
 
-           return mode;
-         };
+             function isArrayLike(value) {
+               return value != null && isLength(value.length) && !isFunction(value);
+             }
+             /**
+              * This method is like `_.isArrayLike` except that it also checks if `value`
+              * is an object.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is an array-like object,
+              *  else `false`.
+              * @example
+              *
+              * _.isArrayLikeObject([1, 2, 3]);
+              * // => true
+              *
+              * _.isArrayLikeObject(document.body.children);
+              * // => true
+              *
+              * _.isArrayLikeObject('abc');
+              * // => false
+              *
+              * _.isArrayLikeObject(_.noop);
+              * // => false
+              */
 
-         mode.activeID = function () {
-           if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
 
-           return mode;
-         };
+             function isArrayLikeObject(value) {
+               return isObjectLike(value) && isArrayLike(value);
+             }
+             /**
+              * Checks if `value` is classified as a boolean primitive or object.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
+              * @example
+              *
+              * _.isBoolean(false);
+              * // => true
+              *
+              * _.isBoolean(null);
+              * // => false
+              */
 
-         mode.restoreSelectedIDs = function (_) {
-           if (!arguments.length) return _restoreSelectedIDs;
-           _restoreSelectedIDs = _;
-           return mode;
-         };
 
-         mode.behavior = drag;
-         return mode;
-       }
+             function isBoolean(value) {
+               return value === true || value === false || isObjectLike(value) && baseGetTag(value) == boolTag;
+             }
+             /**
+              * Checks if `value` is a buffer.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.3.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
+              * @example
+              *
+              * _.isBuffer(new Buffer(2));
+              * // => true
+              *
+              * _.isBuffer(new Uint8Array(2));
+              * // => false
+              */
 
-       // Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
-       var NON_GENERIC = !!nativePromiseConstructor && fails(function () {
-         nativePromiseConstructor.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
-       });
 
-       // `Promise.prototype.finally` method
-       // https://tc39.github.io/ecma262/#sec-promise.prototype.finally
-       _export({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
-         'finally': function (onFinally) {
-           var C = speciesConstructor(this, getBuiltIn('Promise'));
-           var isFunction = typeof onFinally == 'function';
-           return this.then(
-             isFunction ? function (x) {
-               return promiseResolve(C, onFinally()).then(function () { return x; });
-             } : onFinally,
-             isFunction ? function (e) {
-               return promiseResolve(C, onFinally()).then(function () { throw e; });
-             } : onFinally
-           );
-         }
-       });
+             var isBuffer = nativeIsBuffer || stubFalse;
+             /**
+              * Checks if `value` is classified as a `Date` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
+              * @example
+              *
+              * _.isDate(new Date);
+              * // => true
+              *
+              * _.isDate('Mon April 23 2012');
+              * // => false
+              */
+
+             var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
+             /**
+              * Checks if `value` is likely a DOM element.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
+              * @example
+              *
+              * _.isElement(document.body);
+              * // => true
+              *
+              * _.isElement('<body>');
+              * // => false
+              */
 
-       // patch native Promise.prototype for native async functions
-       if ( typeof nativePromiseConstructor == 'function' && !nativePromiseConstructor.prototype['finally']) {
-         redefine(nativePromiseConstructor.prototype, 'finally', getBuiltIn('Promise').prototype['finally']);
-       }
+             function isElement(value) {
+               return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
+             }
+             /**
+              * Checks if `value` is an empty object, collection, map, or set.
+              *
+              * Objects are considered empty if they have no own enumerable string keyed
+              * properties.
+              *
+              * Array-like values such as `arguments` objects, arrays, buffers, strings, or
+              * jQuery-like collections are considered empty if they have a `length` of `0`.
+              * Similarly, maps and sets are considered empty if they have a `size` of `0`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is empty, else `false`.
+              * @example
+              *
+              * _.isEmpty(null);
+              * // => true
+              *
+              * _.isEmpty(true);
+              * // => true
+              *
+              * _.isEmpty(1);
+              * // => true
+              *
+              * _.isEmpty([1, 2, 3]);
+              * // => false
+              *
+              * _.isEmpty({ 'a': 1 });
+              * // => false
+              */
 
-       // @@search logic
-       fixRegexpWellKnownSymbolLogic('search', 1, function (SEARCH, nativeSearch, maybeCallNative) {
-         return [
-           // `String.prototype.search` method
-           // https://tc39.github.io/ecma262/#sec-string.prototype.search
-           function search(regexp) {
-             var O = requireObjectCoercible(this);
-             var searcher = regexp == undefined ? undefined : regexp[SEARCH];
-             return searcher !== undefined ? searcher.call(regexp, O) : new RegExp(regexp)[SEARCH](String(O));
-           },
-           // `RegExp.prototype[@@search]` method
-           // https://tc39.github.io/ecma262/#sec-regexp.prototype-@@search
-           function (regexp) {
-             var res = maybeCallNative(nativeSearch, regexp, this);
-             if (res.done) return res.value;
 
-             var rx = anObject(regexp);
-             var S = String(this);
+             function isEmpty(value) {
+               if (value == null) {
+                 return true;
+               }
 
-             var previousLastIndex = rx.lastIndex;
-             if (!sameValue(previousLastIndex, 0)) rx.lastIndex = 0;
-             var result = regexpExecAbstract(rx, S);
-             if (!sameValue(rx.lastIndex, previousLastIndex)) rx.lastIndex = previousLastIndex;
-             return result === null ? -1 : result.index;
-           }
-         ];
-       });
+               if (isArrayLike(value) && (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' || isBuffer(value) || isTypedArray(value) || isArguments(value))) {
+                 return !value.length;
+               }
 
-       function quickselect$1(arr, k, left, right, compare) {
-         quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
-       }
+               var tag = getTag(value);
 
-       function quickselectStep(arr, k, left, right, compare) {
-         while (right > left) {
-           if (right - left > 600) {
-             var n = right - left + 1;
-             var m = k - left + 1;
-             var z = Math.log(n);
-             var s = 0.5 * Math.exp(2 * z / 3);
-             var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-             var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-             var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-             quickselectStep(arr, k, newLeft, newRight, compare);
-           }
+               if (tag == mapTag || tag == setTag) {
+                 return !value.size;
+               }
 
-           var t = arr[k];
-           var i = left;
-           var j = right;
-           swap$1(arr, left, k);
-           if (compare(arr[right], t) > 0) swap$1(arr, left, right);
+               if (isPrototype(value)) {
+                 return !baseKeys(value).length;
+               }
 
-           while (i < j) {
-             swap$1(arr, i, j);
-             i++;
-             j--;
+               for (var key in value) {
+                 if (hasOwnProperty.call(value, key)) {
+                   return false;
+                 }
+               }
 
-             while (compare(arr[i], t) < 0) {
-               i++;
+               return true;
              }
+             /**
+              * Performs a deep comparison between two values to determine if they are
+              * equivalent.
+              *
+              * **Note:** This method supports comparing arrays, array buffers, booleans,
+              * date objects, error objects, maps, numbers, `Object` objects, regexes,
+              * sets, strings, symbols, and typed arrays. `Object` objects are compared
+              * by their own, not inherited, enumerable properties. Functions and DOM
+              * nodes are compared by strict equality, i.e. `===`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+              * @example
+              *
+              * var object = { 'a': 1 };
+              * var other = { 'a': 1 };
+              *
+              * _.isEqual(object, other);
+              * // => true
+              *
+              * object === other;
+              * // => false
+              */
 
-             while (compare(arr[j], t) > 0) {
-               j--;
+
+             function isEqual(value, other) {
+               return baseIsEqual(value, other);
              }
-           }
+             /**
+              * This method is like `_.isEqual` except that it accepts `customizer` which
+              * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+              * are handled by the method instead. The `customizer` is invoked with up to
+              * six arguments: (objValue, othValue [, index|key, object, other, stack]).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @param {Function} [customizer] The function to customize comparisons.
+              * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
+              * @example
+              *
+              * function isGreeting(value) {
+              *   return /^h(?:i|ello)$/.test(value);
+              * }
+              *
+              * function customizer(objValue, othValue) {
+              *   if (isGreeting(objValue) && isGreeting(othValue)) {
+              *     return true;
+              *   }
+              * }
+              *
+              * var array = ['hello', 'goodbye'];
+              * var other = ['hi', 'goodbye'];
+              *
+              * _.isEqualWith(array, other, customizer);
+              * // => true
+              */
 
-           if (compare(arr[left], t) === 0) swap$1(arr, left, j);else {
-             j++;
-             swap$1(arr, j, right);
-           }
-           if (j <= k) left = j + 1;
-           if (k <= j) right = j - 1;
-         }
-       }
 
-       function swap$1(arr, i, j) {
-         var tmp = arr[i];
-         arr[i] = arr[j];
-         arr[j] = tmp;
-       }
+             function isEqualWith(value, other, customizer) {
+               customizer = typeof customizer == 'function' ? customizer : undefined$1;
+               var result = customizer ? customizer(value, other) : undefined$1;
+               return result === undefined$1 ? baseIsEqual(value, other, undefined$1, customizer) : !!result;
+             }
+             /**
+              * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
+              * `SyntaxError`, `TypeError`, or `URIError` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
+              * @example
+              *
+              * _.isError(new Error);
+              * // => true
+              *
+              * _.isError(Error);
+              * // => false
+              */
 
-       function defaultCompare(a, b) {
-         return a < b ? -1 : a > b ? 1 : 0;
-       }
 
-       var RBush = /*#__PURE__*/function () {
-         function RBush() {
-           var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
+             function isError(value) {
+               if (!isObjectLike(value)) {
+                 return false;
+               }
+
+               var tag = baseGetTag(value);
+               return tag == errorTag || tag == domExcTag || typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value);
+             }
+             /**
+              * Checks if `value` is a finite primitive number.
+              *
+              * **Note:** This method is based on
+              * [`Number.isFinite`](https://mdn.io/Number/isFinite).
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
+              * @example
+              *
+              * _.isFinite(3);
+              * // => true
+              *
+              * _.isFinite(Number.MIN_VALUE);
+              * // => true
+              *
+              * _.isFinite(Infinity);
+              * // => false
+              *
+              * _.isFinite('3');
+              * // => false
+              */
 
-           _classCallCheck(this, RBush);
 
-           // max entries in a node is 9 by default; min node fill is 40% for best performance
-           this._maxEntries = Math.max(4, maxEntries);
-           this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
-           this.clear();
-         }
+             function isFinite(value) {
+               return typeof value == 'number' && nativeIsFinite(value);
+             }
+             /**
+              * Checks if `value` is classified as a `Function` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a function, else `false`.
+              * @example
+              *
+              * _.isFunction(_);
+              * // => true
+              *
+              * _.isFunction(/abc/);
+              * // => false
+              */
 
-         _createClass(RBush, [{
-           key: "all",
-           value: function all() {
-             return this._all(this.data, []);
-           }
-         }, {
-           key: "search",
-           value: function search(bbox) {
-             var node = this.data;
-             var result = [];
-             if (!intersects(bbox, node)) return result;
-             var toBBox = this.toBBox;
-             var nodesToSearch = [];
 
-             while (node) {
-               for (var i = 0; i < node.children.length; i++) {
-                 var child = node.children[i];
-                 var childBBox = node.leaf ? toBBox(child) : child;
+             function isFunction(value) {
+               if (!isObject(value)) {
+                 return false;
+               } // The use of `Object#toString` avoids issues with the `typeof` operator
+               // in Safari 9 which returns 'object' for typed arrays and other constructors.
 
-                 if (intersects(bbox, childBBox)) {
-                   if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
-                 }
-               }
 
-               node = nodesToSearch.pop();
+               var tag = baseGetTag(value);
+               return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
              }
+             /**
+              * Checks if `value` is an integer.
+              *
+              * **Note:** This method is based on
+              * [`Number.isInteger`](https://mdn.io/Number/isInteger).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
+              * @example
+              *
+              * _.isInteger(3);
+              * // => true
+              *
+              * _.isInteger(Number.MIN_VALUE);
+              * // => false
+              *
+              * _.isInteger(Infinity);
+              * // => false
+              *
+              * _.isInteger('3');
+              * // => false
+              */
 
-             return result;
-           }
-         }, {
-           key: "collides",
-           value: function collides(bbox) {
-             var node = this.data;
-             if (!intersects(bbox, node)) return false;
-             var nodesToSearch = [];
 
-             while (node) {
-               for (var i = 0; i < node.children.length; i++) {
-                 var child = node.children[i];
-                 var childBBox = node.leaf ? this.toBBox(child) : child;
+             function isInteger(value) {
+               return typeof value == 'number' && value == toInteger(value);
+             }
+             /**
+              * Checks if `value` is a valid array-like length.
+              *
+              * **Note:** This method is loosely based on
+              * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
+              * @example
+              *
+              * _.isLength(3);
+              * // => true
+              *
+              * _.isLength(Number.MIN_VALUE);
+              * // => false
+              *
+              * _.isLength(Infinity);
+              * // => false
+              *
+              * _.isLength('3');
+              * // => false
+              */
 
-                 if (intersects(bbox, childBBox)) {
-                   if (node.leaf || contains(bbox, childBBox)) return true;
-                   nodesToSearch.push(child);
-                 }
-               }
 
-               node = nodesToSearch.pop();
+             function isLength(value) {
+               return typeof value == 'number' && value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
              }
+             /**
+              * Checks if `value` is the
+              * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
+              * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is an object, else `false`.
+              * @example
+              *
+              * _.isObject({});
+              * // => true
+              *
+              * _.isObject([1, 2, 3]);
+              * // => true
+              *
+              * _.isObject(_.noop);
+              * // => true
+              *
+              * _.isObject(null);
+              * // => false
+              */
 
-             return false;
-           }
-         }, {
-           key: "load",
-           value: function load(data) {
-             if (!(data && data.length)) return this;
 
-             if (data.length < this._minEntries) {
-               for (var i = 0; i < data.length; i++) {
-                 this.insert(data[i]);
-               }
+             function isObject(value) {
+               var type = _typeof(value);
 
-               return this;
-             } // recursively build the tree with the given data from scratch using OMT algorithm
+               return value != null && (type == 'object' || type == 'function');
+             }
+             /**
+              * Checks if `value` is object-like. A value is object-like if it's not `null`
+              * and has a `typeof` result of "object".
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
+              * @example
+              *
+              * _.isObjectLike({});
+              * // => true
+              *
+              * _.isObjectLike([1, 2, 3]);
+              * // => true
+              *
+              * _.isObjectLike(_.noop);
+              * // => false
+              *
+              * _.isObjectLike(null);
+              * // => false
+              */
 
 
-             var node = this._build(data.slice(), 0, data.length - 1, 0);
+             function isObjectLike(value) {
+               return value != null && _typeof(value) == 'object';
+             }
+             /**
+              * Checks if `value` is classified as a `Map` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.3.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a map, else `false`.
+              * @example
+              *
+              * _.isMap(new Map);
+              * // => true
+              *
+              * _.isMap(new WeakMap);
+              * // => false
+              */
 
-             if (!this.data.children.length) {
-               // save as is if tree is empty
-               this.data = node;
-             } else if (this.data.height === node.height) {
-               // split root if trees have the same height
-               this._splitRoot(this.data, node);
-             } else {
-               if (this.data.height < node.height) {
-                 // swap trees if inserted one is bigger
-                 var tmpNode = this.data;
-                 this.data = node;
-                 node = tmpNode;
-               } // insert the small tree into the large tree at appropriate level
 
+             var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
+             /**
+              * Performs a partial deep comparison between `object` and `source` to
+              * determine if `object` contains equivalent property values.
+              *
+              * **Note:** This method is equivalent to `_.matches` when `source` is
+              * partially applied.
+              *
+              * Partial comparisons will match empty array and empty object `source`
+              * values against any array or object value, respectively. See `_.isEqual`
+              * for a list of supported value comparisons.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Lang
+              * @param {Object} object The object to inspect.
+              * @param {Object} source The object of property values to match.
+              * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+              * @example
+              *
+              * var object = { 'a': 1, 'b': 2 };
+              *
+              * _.isMatch(object, { 'b': 2 });
+              * // => true
+              *
+              * _.isMatch(object, { 'b': 1 });
+              * // => false
+              */
 
-               this._insert(node, this.data.height - node.height - 1, true);
+             function isMatch(object, source) {
+               return object === source || baseIsMatch(object, source, getMatchData(source));
              }
+             /**
+              * This method is like `_.isMatch` except that it accepts `customizer` which
+              * is invoked to compare values. If `customizer` returns `undefined`, comparisons
+              * are handled by the method instead. The `customizer` is invoked with five
+              * arguments: (objValue, srcValue, index|key, object, source).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {Object} object The object to inspect.
+              * @param {Object} source The object of property values to match.
+              * @param {Function} [customizer] The function to customize comparisons.
+              * @returns {boolean} Returns `true` if `object` is a match, else `false`.
+              * @example
+              *
+              * function isGreeting(value) {
+              *   return /^h(?:i|ello)$/.test(value);
+              * }
+              *
+              * function customizer(objValue, srcValue) {
+              *   if (isGreeting(objValue) && isGreeting(srcValue)) {
+              *     return true;
+              *   }
+              * }
+              *
+              * var object = { 'greeting': 'hello' };
+              * var source = { 'greeting': 'hi' };
+              *
+              * _.isMatchWith(object, source, customizer);
+              * // => true
+              */
 
-             return this;
-           }
-         }, {
-           key: "insert",
-           value: function insert(item) {
-             if (item) this._insert(item, this.data.height - 1);
-             return this;
-           }
-         }, {
-           key: "clear",
-           value: function clear() {
-             this.data = createNode([]);
-             return this;
-           }
-         }, {
-           key: "remove",
-           value: function remove(item, equalsFn) {
-             if (!item) return this;
-             var node = this.data;
-             var bbox = this.toBBox(item);
-             var path = [];
-             var indexes = [];
-             var i, parent, goingUp; // depth-first iterative tree traversal
 
-             while (node || path.length) {
-               if (!node) {
-                 // go up
-                 node = path.pop();
-                 parent = path[path.length - 1];
-                 i = indexes.pop();
-                 goingUp = true;
-               }
+             function isMatchWith(object, source, customizer) {
+               customizer = typeof customizer == 'function' ? customizer : undefined$1;
+               return baseIsMatch(object, source, getMatchData(source), customizer);
+             }
+             /**
+              * Checks if `value` is `NaN`.
+              *
+              * **Note:** This method is based on
+              * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
+              * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
+              * `undefined` and other non-number values.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
+              * @example
+              *
+              * _.isNaN(NaN);
+              * // => true
+              *
+              * _.isNaN(new Number(NaN));
+              * // => true
+              *
+              * isNaN(undefined);
+              * // => true
+              *
+              * _.isNaN(undefined);
+              * // => false
+              */
 
-               if (node.leaf) {
-                 // check current node
-                 var index = findItem(item, node.children, equalsFn);
 
-                 if (index !== -1) {
-                   // item found, remove the item and condense tree upwards
-                   node.children.splice(index, 1);
-                   path.push(node);
+             function isNaN(value) {
+               // An `NaN` primitive is the only value that is not equal to itself.
+               // Perform the `toStringTag` check first to avoid errors with some
+               // ActiveX objects in IE.
+               return isNumber(value) && value != +value;
+             }
+             /**
+              * Checks if `value` is a pristine native function.
+              *
+              * **Note:** This method can't reliably detect native functions in the presence
+              * of the core-js package because core-js circumvents this kind of detection.
+              * Despite multiple requests, the core-js maintainer has made it clear: any
+              * attempt to fix the detection will be obstructed. As a result, we're left
+              * with little choice but to throw an error. Unfortunately, this also affects
+              * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
+              * which rely on core-js.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a native function,
+              *  else `false`.
+              * @example
+              *
+              * _.isNative(Array.prototype.push);
+              * // => true
+              *
+              * _.isNative(_);
+              * // => false
+              */
 
-                   this._condense(path);
 
-                   return this;
-                 }
+             function isNative(value) {
+               if (isMaskable(value)) {
+                 throw new Error(CORE_ERROR_TEXT);
                }
 
-               if (!goingUp && !node.leaf && contains(node, bbox)) {
-                 // go down
-                 path.push(node);
-                 indexes.push(i);
-                 i = 0;
-                 parent = node;
-                 node = node.children[0];
-               } else if (parent) {
-                 // go right
-                 i++;
-                 node = parent.children[i];
-                 goingUp = false;
-               } else node = null; // nothing found
-
+               return baseIsNative(value);
              }
+             /**
+              * Checks if `value` is `null`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
+              * @example
+              *
+              * _.isNull(null);
+              * // => true
+              *
+              * _.isNull(void 0);
+              * // => false
+              */
 
-             return this;
-           }
-         }, {
-           key: "toBBox",
-           value: function toBBox(item) {
-             return item;
-           }
-         }, {
-           key: "compareMinX",
-           value: function compareMinX(a, b) {
-             return a.minX - b.minX;
-           }
-         }, {
-           key: "compareMinY",
-           value: function compareMinY(a, b) {
-             return a.minY - b.minY;
-           }
-         }, {
-           key: "toJSON",
-           value: function toJSON() {
-             return this.data;
-           }
-         }, {
-           key: "fromJSON",
-           value: function fromJSON(data) {
-             this.data = data;
-             return this;
-           }
-         }, {
-           key: "_all",
-           value: function _all(node, result) {
-             var nodesToSearch = [];
 
-             while (node) {
-               if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
-               node = nodesToSearch.pop();
+             function isNull(value) {
+               return value === null;
              }
+             /**
+              * Checks if `value` is `null` or `undefined`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
+              * @example
+              *
+              * _.isNil(null);
+              * // => true
+              *
+              * _.isNil(void 0);
+              * // => true
+              *
+              * _.isNil(NaN);
+              * // => false
+              */
 
-             return result;
-           }
-         }, {
-           key: "_build",
-           value: function _build(items, left, right, height) {
-             var N = right - left + 1;
-             var M = this._maxEntries;
-             var node;
 
-             if (N <= M) {
-               // reached leaf level; return leaf
-               node = createNode(items.slice(left, right + 1));
-               calcBBox(node, this.toBBox);
-               return node;
+             function isNil(value) {
+               return value == null;
              }
+             /**
+              * Checks if `value` is classified as a `Number` primitive or object.
+              *
+              * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
+              * classified as numbers, use the `_.isFinite` method.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a number, else `false`.
+              * @example
+              *
+              * _.isNumber(3);
+              * // => true
+              *
+              * _.isNumber(Number.MIN_VALUE);
+              * // => true
+              *
+              * _.isNumber(Infinity);
+              * // => true
+              *
+              * _.isNumber('3');
+              * // => false
+              */
 
-             if (!height) {
-               // target height of the bulk-loaded tree
-               height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
 
-               M = Math.ceil(N / Math.pow(M, height - 1));
+             function isNumber(value) {
+               return typeof value == 'number' || isObjectLike(value) && baseGetTag(value) == numberTag;
              }
+             /**
+              * Checks if `value` is a plain object, that is, an object created by the
+              * `Object` constructor or one with a `[[Prototype]]` of `null`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.8.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              * }
+              *
+              * _.isPlainObject(new Foo);
+              * // => false
+              *
+              * _.isPlainObject([1, 2, 3]);
+              * // => false
+              *
+              * _.isPlainObject({ 'x': 0, 'y': 0 });
+              * // => true
+              *
+              * _.isPlainObject(Object.create(null));
+              * // => true
+              */
 
-             node = createNode([]);
-             node.leaf = false;
-             node.height = height; // split the items into M mostly square tiles
-
-             var N2 = Math.ceil(N / M);
-             var N1 = N2 * Math.ceil(Math.sqrt(M));
-             multiSelect(items, left, right, N1, this.compareMinX);
 
-             for (var i = left; i <= right; i += N1) {
-               var right2 = Math.min(i + N1 - 1, right);
-               multiSelect(items, i, right2, N2, this.compareMinY);
+             function isPlainObject(value) {
+               if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
+                 return false;
+               }
 
-               for (var j = i; j <= right2; j += N2) {
-                 var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
+               var proto = getPrototype(value);
 
-                 node.children.push(this._build(items, j, right3, height - 1));
+               if (proto === null) {
+                 return true;
                }
+
+               var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
+               return typeof Ctor == 'function' && Ctor instanceof Ctor && funcToString.call(Ctor) == objectCtorString;
              }
+             /**
+              * Checks if `value` is classified as a `RegExp` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.1.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
+              * @example
+              *
+              * _.isRegExp(/abc/);
+              * // => true
+              *
+              * _.isRegExp('/abc/');
+              * // => false
+              */
 
-             calcBBox(node, this.toBBox);
-             return node;
-           }
-         }, {
-           key: "_chooseSubtree",
-           value: function _chooseSubtree(bbox, node, level, path) {
-             while (true) {
-               path.push(node);
-               if (node.leaf || path.length - 1 === level) break;
-               var minArea = Infinity;
-               var minEnlargement = Infinity;
-               var targetNode = void 0;
 
-               for (var i = 0; i < node.children.length; i++) {
-                 var child = node.children[i];
-                 var area = bboxArea(child);
-                 var enlargement = enlargedArea(bbox, child) - area; // choose entry with the least area enlargement
+             var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
+             /**
+              * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
+              * double precision number which isn't the result of a rounded unsafe integer.
+              *
+              * **Note:** This method is based on
+              * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
+              * @example
+              *
+              * _.isSafeInteger(3);
+              * // => true
+              *
+              * _.isSafeInteger(Number.MIN_VALUE);
+              * // => false
+              *
+              * _.isSafeInteger(Infinity);
+              * // => false
+              *
+              * _.isSafeInteger('3');
+              * // => false
+              */
 
-                 if (enlargement < minEnlargement) {
-                   minEnlargement = enlargement;
-                   minArea = area < minArea ? area : minArea;
-                   targetNode = child;
-                 } else if (enlargement === minEnlargement) {
-                   // otherwise choose one with the smallest area
-                   if (area < minArea) {
-                     minArea = area;
-                     targetNode = child;
-                   }
-                 }
-               }
+             function isSafeInteger(value) {
+               return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
+             }
+             /**
+              * Checks if `value` is classified as a `Set` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.3.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a set, else `false`.
+              * @example
+              *
+              * _.isSet(new Set);
+              * // => true
+              *
+              * _.isSet(new WeakSet);
+              * // => false
+              */
+
+
+             var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
+             /**
+              * Checks if `value` is classified as a `String` primitive or object.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a string, else `false`.
+              * @example
+              *
+              * _.isString('abc');
+              * // => true
+              *
+              * _.isString(1);
+              * // => false
+              */
+
+             function isString(value) {
+               return typeof value == 'string' || !isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag;
+             }
+             /**
+              * Checks if `value` is classified as a `Symbol` primitive or object.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
+              * @example
+              *
+              * _.isSymbol(Symbol.iterator);
+              * // => true
+              *
+              * _.isSymbol('abc');
+              * // => false
+              */
 
-               node = targetNode || node.children[0];
-             }
 
-             return node;
-           }
-         }, {
-           key: "_insert",
-           value: function _insert(item, level, isNode) {
-             var bbox = isNode ? item : this.toBBox(item);
-             var insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
+             function isSymbol(value) {
+               return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
+             }
+             /**
+              * Checks if `value` is classified as a typed array.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
+              * @example
+              *
+              * _.isTypedArray(new Uint8Array);
+              * // => true
+              *
+              * _.isTypedArray([]);
+              * // => false
+              */
 
-             var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
+             var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
+             /**
+              * Checks if `value` is `undefined`.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
+              * @example
+              *
+              * _.isUndefined(void 0);
+              * // => true
+              *
+              * _.isUndefined(null);
+              * // => false
+              */
 
-             node.children.push(item);
-             extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
+             function isUndefined(value) {
+               return value === undefined$1;
+             }
+             /**
+              * Checks if `value` is classified as a `WeakMap` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.3.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
+              * @example
+              *
+              * _.isWeakMap(new WeakMap);
+              * // => true
+              *
+              * _.isWeakMap(new Map);
+              * // => false
+              */
 
-             while (level >= 0) {
-               if (insertPath[level].children.length > this._maxEntries) {
-                 this._split(insertPath, level);
 
-                 level--;
-               } else break;
-             } // adjust bboxes along the insertion path
+             function isWeakMap(value) {
+               return isObjectLike(value) && getTag(value) == weakMapTag;
+             }
+             /**
+              * Checks if `value` is classified as a `WeakSet` object.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.3.0
+              * @category Lang
+              * @param {*} value The value to check.
+              * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
+              * @example
+              *
+              * _.isWeakSet(new WeakSet);
+              * // => true
+              *
+              * _.isWeakSet(new Set);
+              * // => false
+              */
 
 
-             this._adjustParentBBoxes(bbox, insertPath, level);
-           } // split overflowed node into two
+             function isWeakSet(value) {
+               return isObjectLike(value) && baseGetTag(value) == weakSetTag;
+             }
+             /**
+              * Checks if `value` is less than `other`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.9.0
+              * @category Lang
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @returns {boolean} Returns `true` if `value` is less than `other`,
+              *  else `false`.
+              * @see _.gt
+              * @example
+              *
+              * _.lt(1, 3);
+              * // => true
+              *
+              * _.lt(3, 3);
+              * // => false
+              *
+              * _.lt(3, 1);
+              * // => false
+              */
 
-         }, {
-           key: "_split",
-           value: function _split(insertPath, level) {
-             var node = insertPath[level];
-             var M = node.children.length;
-             var m = this._minEntries;
 
-             this._chooseSplitAxis(node, m, M);
+             var lt = createRelationalOperation(baseLt);
+             /**
+              * Checks if `value` is less than or equal to `other`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.9.0
+              * @category Lang
+              * @param {*} value The value to compare.
+              * @param {*} other The other value to compare.
+              * @returns {boolean} Returns `true` if `value` is less than or equal to
+              *  `other`, else `false`.
+              * @see _.gte
+              * @example
+              *
+              * _.lte(1, 3);
+              * // => true
+              *
+              * _.lte(3, 3);
+              * // => true
+              *
+              * _.lte(3, 1);
+              * // => false
+              */
 
-             var splitIndex = this._chooseSplitIndex(node, m, M);
+             var lte = createRelationalOperation(function (value, other) {
+               return value <= other;
+             });
+             /**
+              * Converts `value` to an array.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Lang
+              * @param {*} value The value to convert.
+              * @returns {Array} Returns the converted array.
+              * @example
+              *
+              * _.toArray({ 'a': 1, 'b': 2 });
+              * // => [1, 2]
+              *
+              * _.toArray('abc');
+              * // => ['a', 'b', 'c']
+              *
+              * _.toArray(1);
+              * // => []
+              *
+              * _.toArray(null);
+              * // => []
+              */
 
-             var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
-             newNode.height = node.height;
-             newNode.leaf = node.leaf;
-             calcBBox(node, this.toBBox);
-             calcBBox(newNode, this.toBBox);
-             if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
-           }
-         }, {
-           key: "_splitRoot",
-           value: function _splitRoot(node, newNode) {
-             // split root node
-             this.data = createNode([node, newNode]);
-             this.data.height = node.height + 1;
-             this.data.leaf = false;
-             calcBBox(this.data, this.toBBox);
-           }
-         }, {
-           key: "_chooseSplitIndex",
-           value: function _chooseSplitIndex(node, m, M) {
-             var index;
-             var minOverlap = Infinity;
-             var minArea = Infinity;
+             function toArray(value) {
+               if (!value) {
+                 return [];
+               }
 
-             for (var i = m; i <= M - m; i++) {
-               var bbox1 = distBBox(node, 0, i, this.toBBox);
-               var bbox2 = distBBox(node, i, M, this.toBBox);
-               var overlap = intersectionArea(bbox1, bbox2);
-               var area = bboxArea(bbox1) + bboxArea(bbox2); // choose distribution with minimum overlap
+               if (isArrayLike(value)) {
+                 return isString(value) ? stringToArray(value) : copyArray(value);
+               }
 
-               if (overlap < minOverlap) {
-                 minOverlap = overlap;
-                 index = i;
-                 minArea = area < minArea ? area : minArea;
-               } else if (overlap === minOverlap) {
-                 // otherwise choose distribution with minimum area
-                 if (area < minArea) {
-                   minArea = area;
-                   index = i;
-                 }
+               if (symIterator && value[symIterator]) {
+                 return iteratorToArray(value[symIterator]());
                }
-             }
 
-             return index || M - m;
-           } // sorts node children by the best axis for split
+               var tag = getTag(value),
+                   func = tag == mapTag ? mapToArray : tag == setTag ? setToArray : values;
+               return func(value);
+             }
+             /**
+              * Converts `value` to a finite number.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.12.0
+              * @category Lang
+              * @param {*} value The value to convert.
+              * @returns {number} Returns the converted number.
+              * @example
+              *
+              * _.toFinite(3.2);
+              * // => 3.2
+              *
+              * _.toFinite(Number.MIN_VALUE);
+              * // => 5e-324
+              *
+              * _.toFinite(Infinity);
+              * // => 1.7976931348623157e+308
+              *
+              * _.toFinite('3.2');
+              * // => 3.2
+              */
 
-         }, {
-           key: "_chooseSplitAxis",
-           value: function _chooseSplitAxis(node, m, M) {
-             var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
-             var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
 
-             var xMargin = this._allDistMargin(node, m, M, compareMinX);
+             function toFinite(value) {
+               if (!value) {
+                 return value === 0 ? value : 0;
+               }
 
-             var yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
-             // otherwise it's already sorted by minY
+               value = toNumber(value);
 
+               if (value === INFINITY || value === -INFINITY) {
+                 var sign = value < 0 ? -1 : 1;
+                 return sign * MAX_INTEGER;
+               }
 
-             if (xMargin < yMargin) node.children.sort(compareMinX);
-           } // total margin of all possible split distributions where each node is at least m full
+               return value === value ? value : 0;
+             }
+             /**
+              * Converts `value` to an integer.
+              *
+              * **Note:** This method is loosely based on
+              * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to convert.
+              * @returns {number} Returns the converted integer.
+              * @example
+              *
+              * _.toInteger(3.2);
+              * // => 3
+              *
+              * _.toInteger(Number.MIN_VALUE);
+              * // => 0
+              *
+              * _.toInteger(Infinity);
+              * // => 1.7976931348623157e+308
+              *
+              * _.toInteger('3.2');
+              * // => 3
+              */
 
-         }, {
-           key: "_allDistMargin",
-           value: function _allDistMargin(node, m, M, compare) {
-             node.children.sort(compare);
-             var toBBox = this.toBBox;
-             var leftBBox = distBBox(node, 0, m, toBBox);
-             var rightBBox = distBBox(node, M - m, M, toBBox);
-             var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
 
-             for (var i = m; i < M - m; i++) {
-               var child = node.children[i];
-               extend$1(leftBBox, node.leaf ? toBBox(child) : child);
-               margin += bboxMargin(leftBBox);
+             function toInteger(value) {
+               var result = toFinite(value),
+                   remainder = result % 1;
+               return result === result ? remainder ? result - remainder : result : 0;
              }
+             /**
+              * Converts `value` to an integer suitable for use as the length of an
+              * array-like object.
+              *
+              * **Note:** This method is based on
+              * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to convert.
+              * @returns {number} Returns the converted integer.
+              * @example
+              *
+              * _.toLength(3.2);
+              * // => 3
+              *
+              * _.toLength(Number.MIN_VALUE);
+              * // => 0
+              *
+              * _.toLength(Infinity);
+              * // => 4294967295
+              *
+              * _.toLength('3.2');
+              * // => 3
+              */
 
-             for (var _i = M - m - 1; _i >= m; _i--) {
-               var _child = node.children[_i];
-               extend$1(rightBBox, node.leaf ? toBBox(_child) : _child);
-               margin += bboxMargin(rightBBox);
-             }
 
-             return margin;
-           }
-         }, {
-           key: "_adjustParentBBoxes",
-           value: function _adjustParentBBoxes(bbox, path, level) {
-             // adjust bboxes along the given tree path
-             for (var i = level; i >= 0; i--) {
-               extend$1(path[i], bbox);
-             }
-           }
-         }, {
-           key: "_condense",
-           value: function _condense(path) {
-             // go through the path, removing empty nodes and updating bboxes
-             for (var i = path.length - 1, siblings; i >= 0; i--) {
-               if (path[i].children.length === 0) {
-                 if (i > 0) {
-                   siblings = path[i - 1].children;
-                   siblings.splice(siblings.indexOf(path[i]), 1);
-                 } else this.clear();
-               } else calcBBox(path[i], this.toBBox);
+             function toLength(value) {
+               return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
              }
-           }
-         }]);
+             /**
+              * Converts `value` to a number.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to process.
+              * @returns {number} Returns the number.
+              * @example
+              *
+              * _.toNumber(3.2);
+              * // => 3.2
+              *
+              * _.toNumber(Number.MIN_VALUE);
+              * // => 5e-324
+              *
+              * _.toNumber(Infinity);
+              * // => Infinity
+              *
+              * _.toNumber('3.2');
+              * // => 3.2
+              */
 
-         return RBush;
-       }();
 
-       function findItem(item, items, equalsFn) {
-         if (!equalsFn) return items.indexOf(item);
+             function toNumber(value) {
+               if (typeof value == 'number') {
+                 return value;
+               }
 
-         for (var i = 0; i < items.length; i++) {
-           if (equalsFn(item, items[i])) return i;
-         }
+               if (isSymbol(value)) {
+                 return NAN;
+               }
 
-         return -1;
-       } // calculate node's bbox from bboxes of its children
+               if (isObject(value)) {
+                 var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
+                 value = isObject(other) ? other + '' : other;
+               }
 
+               if (typeof value != 'string') {
+                 return value === 0 ? value : +value;
+               }
 
-       function calcBBox(node, toBBox) {
-         distBBox(node, 0, node.children.length, toBBox, node);
-       } // min bounding rectangle of node children from k to p-1
+               value = baseTrim(value);
+               var isBinary = reIsBinary.test(value);
+               return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
+             }
+             /**
+              * Converts `value` to a plain object flattening inherited enumerable string
+              * keyed properties of `value` to own properties of the plain object.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Lang
+              * @param {*} value The value to convert.
+              * @returns {Object} Returns the converted plain object.
+              * @example
+              *
+              * function Foo() {
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.assign({ 'a': 1 }, new Foo);
+              * // => { 'a': 1, 'b': 2 }
+              *
+              * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
+              * // => { 'a': 1, 'b': 2, 'c': 3 }
+              */
 
 
-       function distBBox(node, k, p, toBBox, destNode) {
-         if (!destNode) destNode = createNode(null);
-         destNode.minX = Infinity;
-         destNode.minY = Infinity;
-         destNode.maxX = -Infinity;
-         destNode.maxY = -Infinity;
+             function toPlainObject(value) {
+               return copyObject(value, keysIn(value));
+             }
+             /**
+              * Converts `value` to a safe integer. A safe integer can be compared and
+              * represented correctly.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to convert.
+              * @returns {number} Returns the converted integer.
+              * @example
+              *
+              * _.toSafeInteger(3.2);
+              * // => 3
+              *
+              * _.toSafeInteger(Number.MIN_VALUE);
+              * // => 0
+              *
+              * _.toSafeInteger(Infinity);
+              * // => 9007199254740991
+              *
+              * _.toSafeInteger('3.2');
+              * // => 3
+              */
 
-         for (var i = k; i < p; i++) {
-           var child = node.children[i];
-           extend$1(destNode, node.leaf ? toBBox(child) : child);
-         }
 
-         return destNode;
-       }
+             function toSafeInteger(value) {
+               return value ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER) : value === 0 ? value : 0;
+             }
+             /**
+              * Converts `value` to a string. An empty string is returned for `null`
+              * and `undefined` values. The sign of `-0` is preserved.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Lang
+              * @param {*} value The value to convert.
+              * @returns {string} Returns the converted string.
+              * @example
+              *
+              * _.toString(null);
+              * // => ''
+              *
+              * _.toString(-0);
+              * // => '-0'
+              *
+              * _.toString([1, 2, 3]);
+              * // => '1,2,3'
+              */
 
-       function extend$1(a, b) {
-         a.minX = Math.min(a.minX, b.minX);
-         a.minY = Math.min(a.minY, b.minY);
-         a.maxX = Math.max(a.maxX, b.maxX);
-         a.maxY = Math.max(a.maxY, b.maxY);
-         return a;
-       }
 
-       function compareNodeMinX(a, b) {
-         return a.minX - b.minX;
-       }
+             function toString(value) {
+               return value == null ? '' : baseToString(value);
+             }
+             /*------------------------------------------------------------------------*/
 
-       function compareNodeMinY(a, b) {
-         return a.minY - b.minY;
-       }
+             /**
+              * Assigns own enumerable string keyed properties of source objects to the
+              * destination object. Source objects are applied from left to right.
+              * Subsequent sources overwrite property assignments of previous sources.
+              *
+              * **Note:** This method mutates `object` and is loosely based on
+              * [`Object.assign`](https://mdn.io/Object/assign).
+              *
+              * @static
+              * @memberOf _
+              * @since 0.10.0
+              * @category Object
+              * @param {Object} object The destination object.
+              * @param {...Object} [sources] The source objects.
+              * @returns {Object} Returns `object`.
+              * @see _.assignIn
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              * }
+              *
+              * function Bar() {
+              *   this.c = 3;
+              * }
+              *
+              * Foo.prototype.b = 2;
+              * Bar.prototype.d = 4;
+              *
+              * _.assign({ 'a': 0 }, new Foo, new Bar);
+              * // => { 'a': 1, 'c': 3 }
+              */
 
-       function bboxArea(a) {
-         return (a.maxX - a.minX) * (a.maxY - a.minY);
-       }
 
-       function bboxMargin(a) {
-         return a.maxX - a.minX + (a.maxY - a.minY);
-       }
+             var assign = createAssigner(function (object, source) {
+               if (isPrototype(source) || isArrayLike(source)) {
+                 copyObject(source, keys(source), object);
+                 return;
+               }
 
-       function enlargedArea(a, b) {
-         return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
-       }
+               for (var key in source) {
+                 if (hasOwnProperty.call(source, key)) {
+                   assignValue(object, key, source[key]);
+                 }
+               }
+             });
+             /**
+              * This method is like `_.assign` except that it iterates over own and
+              * inherited source properties.
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @alias extend
+              * @category Object
+              * @param {Object} object The destination object.
+              * @param {...Object} [sources] The source objects.
+              * @returns {Object} Returns `object`.
+              * @see _.assign
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              * }
+              *
+              * function Bar() {
+              *   this.c = 3;
+              * }
+              *
+              * Foo.prototype.b = 2;
+              * Bar.prototype.d = 4;
+              *
+              * _.assignIn({ 'a': 0 }, new Foo, new Bar);
+              * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
+              */
 
-       function intersectionArea(a, b) {
-         var minX = Math.max(a.minX, b.minX);
-         var minY = Math.max(a.minY, b.minY);
-         var maxX = Math.min(a.maxX, b.maxX);
-         var maxY = Math.min(a.maxY, b.maxY);
-         return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
-       }
+             var assignIn = createAssigner(function (object, source) {
+               copyObject(source, keysIn(source), object);
+             });
+             /**
+              * This method is like `_.assignIn` except that it accepts `customizer`
+              * which is invoked to produce the assigned values. If `customizer` returns
+              * `undefined`, assignment is handled by the method instead. The `customizer`
+              * is invoked with five arguments: (objValue, srcValue, key, object, source).
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @alias extendWith
+              * @category Object
+              * @param {Object} object The destination object.
+              * @param {...Object} sources The source objects.
+              * @param {Function} [customizer] The function to customize assigned values.
+              * @returns {Object} Returns `object`.
+              * @see _.assignWith
+              * @example
+              *
+              * function customizer(objValue, srcValue) {
+              *   return _.isUndefined(objValue) ? srcValue : objValue;
+              * }
+              *
+              * var defaults = _.partialRight(_.assignInWith, customizer);
+              *
+              * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+              * // => { 'a': 1, 'b': 2 }
+              */
 
-       function contains(a, b) {
-         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
-       }
+             var assignInWith = createAssigner(function (object, source, srcIndex, customizer) {
+               copyObject(source, keysIn(source), object, customizer);
+             });
+             /**
+              * This method is like `_.assign` except that it accepts `customizer`
+              * which is invoked to produce the assigned values. If `customizer` returns
+              * `undefined`, assignment is handled by the method instead. The `customizer`
+              * is invoked with five arguments: (objValue, srcValue, key, object, source).
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Object
+              * @param {Object} object The destination object.
+              * @param {...Object} sources The source objects.
+              * @param {Function} [customizer] The function to customize assigned values.
+              * @returns {Object} Returns `object`.
+              * @see _.assignInWith
+              * @example
+              *
+              * function customizer(objValue, srcValue) {
+              *   return _.isUndefined(objValue) ? srcValue : objValue;
+              * }
+              *
+              * var defaults = _.partialRight(_.assignWith, customizer);
+              *
+              * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+              * // => { 'a': 1, 'b': 2 }
+              */
 
-       function intersects(a, b) {
-         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
-       }
+             var assignWith = createAssigner(function (object, source, srcIndex, customizer) {
+               copyObject(source, keys(source), object, customizer);
+             });
+             /**
+              * Creates an array of values corresponding to `paths` of `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 1.0.0
+              * @category Object
+              * @param {Object} object The object to iterate over.
+              * @param {...(string|string[])} [paths] The property paths to pick.
+              * @returns {Array} Returns the picked values.
+              * @example
+              *
+              * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
+              *
+              * _.at(object, ['a[0].b.c', 'a[1]']);
+              * // => [3, 4]
+              */
 
-       function createNode(children) {
-         return {
-           children: children,
-           height: 1,
-           leaf: true,
-           minX: Infinity,
-           minY: Infinity,
-           maxX: -Infinity,
-           maxY: -Infinity
-         };
-       } // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
-       // combines selection algorithm with binary divide & conquer approach
+             var at = flatRest(baseAt);
+             /**
+              * Creates an object that inherits from the `prototype` object. If a
+              * `properties` object is given, its own enumerable string keyed properties
+              * are assigned to the created object.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.3.0
+              * @category Object
+              * @param {Object} prototype The object to inherit from.
+              * @param {Object} [properties] The properties to assign to the object.
+              * @returns {Object} Returns the new object.
+              * @example
+              *
+              * function Shape() {
+              *   this.x = 0;
+              *   this.y = 0;
+              * }
+              *
+              * function Circle() {
+              *   Shape.call(this);
+              * }
+              *
+              * Circle.prototype = _.create(Shape.prototype, {
+              *   'constructor': Circle
+              * });
+              *
+              * var circle = new Circle;
+              * circle instanceof Circle;
+              * // => true
+              *
+              * circle instanceof Shape;
+              * // => true
+              */
 
+             function create(prototype, properties) {
+               var result = baseCreate(prototype);
+               return properties == null ? result : baseAssign(result, properties);
+             }
+             /**
+              * Assigns own and inherited enumerable string keyed properties of source
+              * objects to the destination object for all destination properties that
+              * resolve to `undefined`. Source objects are applied from left to right.
+              * Once a property is set, additional values of the same property are ignored.
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Object
+              * @param {Object} object The destination object.
+              * @param {...Object} [sources] The source objects.
+              * @returns {Object} Returns `object`.
+              * @see _.defaultsDeep
+              * @example
+              *
+              * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
+              * // => { 'a': 1, 'b': 2 }
+              */
 
-       function multiSelect(arr, left, right, n, compare) {
-         var stack = [left, right];
 
-         while (stack.length) {
-           right = stack.pop();
-           left = stack.pop();
-           if (right - left <= n) continue;
-           var mid = left + Math.ceil((right - left) / n / 2) * n;
-           quickselect$1(arr, mid, left, right, compare);
-           stack.push(left, mid, mid, right);
-         }
-       }
+             var defaults = baseRest(function (object, sources) {
+               object = Object(object);
+               var index = -1;
+               var length = sources.length;
+               var guard = length > 2 ? sources[2] : undefined$1;
 
-       var tiler = utilTiler();
-       var dispatch$1 = dispatch('loaded');
-       var _tileZoom = 14;
-       var _krUrlRoot = 'https://www.keepright.at';
-       var _krData = {
-         errorTypes: {},
-         localizeStrings: {}
-       }; // This gets reassigned if reset
+               if (guard && isIterateeCall(sources[0], sources[1], guard)) {
+                 length = 1;
+               }
 
-       var _cache;
+               while (++index < length) {
+                 var source = sources[index];
+                 var props = keysIn(source);
+                 var propsIndex = -1;
+                 var propsLength = props.length;
 
-       var _krRuleset = [// no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
-       30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180, 190, 191, 192, 193, 194, 195, 196, 197, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220, 230, 231, 232, 270, 280, 281, 282, 283, 284, 285, 290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313, 320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413];
+                 while (++propsIndex < propsLength) {
+                   var key = props[propsIndex];
+                   var value = object[key];
 
-       function abortRequest(controller) {
-         if (controller) {
-           controller.abort();
-         }
-       }
+                   if (value === undefined$1 || eq(value, objectProto[key]) && !hasOwnProperty.call(object, key)) {
+                     object[key] = source[key];
+                   }
+                 }
+               }
 
-       function abortUnwantedRequests(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k === tile.id;
-           });
+               return object;
+             });
+             /**
+              * This method is like `_.defaults` except that it recursively assigns
+              * default properties.
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.10.0
+              * @category Object
+              * @param {Object} object The destination object.
+              * @param {...Object} [sources] The source objects.
+              * @returns {Object} Returns `object`.
+              * @see _.defaults
+              * @example
+              *
+              * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
+              * // => { 'a': { 'b': 2, 'c': 3 } }
+              */
 
-           if (!wanted) {
-             abortRequest(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
-           }
-         });
-       }
+             var defaultsDeep = baseRest(function (args) {
+               args.push(undefined$1, customDefaultsMerge);
+               return apply(mergeWith, undefined$1, args);
+             });
+             /**
+              * This method is like `_.find` except that it returns the key of the first
+              * element `predicate` returns truthy for instead of the element itself.
+              *
+              * @static
+              * @memberOf _
+              * @since 1.1.0
+              * @category Object
+              * @param {Object} object The object to inspect.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {string|undefined} Returns the key of the matched element,
+              *  else `undefined`.
+              * @example
+              *
+              * var users = {
+              *   'barney':  { 'age': 36, 'active': true },
+              *   'fred':    { 'age': 40, 'active': false },
+              *   'pebbles': { 'age': 1,  'active': true }
+              * };
+              *
+              * _.findKey(users, function(o) { return o.age < 40; });
+              * // => 'barney' (iteration order is not guaranteed)
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.findKey(users, { 'age': 1, 'active': true });
+              * // => 'pebbles'
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.findKey(users, ['active', false]);
+              * // => 'fred'
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.findKey(users, 'active');
+              * // => 'barney'
+              */
 
-       function encodeIssueRtree(d) {
-         return {
-           minX: d.loc[0],
-           minY: d.loc[1],
-           maxX: d.loc[0],
-           maxY: d.loc[1],
-           data: d
-         };
-       } // Replace or remove QAItem from rtree
+             function findKey(object, predicate) {
+               return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
+             }
+             /**
+              * This method is like `_.findKey` except that it iterates over elements of
+              * a collection in the opposite order.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @category Object
+              * @param {Object} object The object to inspect.
+              * @param {Function} [predicate=_.identity] The function invoked per iteration.
+              * @returns {string|undefined} Returns the key of the matched element,
+              *  else `undefined`.
+              * @example
+              *
+              * var users = {
+              *   'barney':  { 'age': 36, 'active': true },
+              *   'fred':    { 'age': 40, 'active': false },
+              *   'pebbles': { 'age': 1,  'active': true }
+              * };
+              *
+              * _.findLastKey(users, function(o) { return o.age < 40; });
+              * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.findLastKey(users, { 'age': 36, 'active': true });
+              * // => 'barney'
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.findLastKey(users, ['active', false]);
+              * // => 'fred'
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.findLastKey(users, 'active');
+              * // => 'pebbles'
+              */
 
 
-       function updateRtree(item, replace) {
-         _cache.rtree.remove(item, function (a, b) {
-           return a.data.id === b.data.id;
-         });
+             function findLastKey(object, predicate) {
+               return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
+             }
+             /**
+              * Iterates over own and inherited enumerable string keyed properties of an
+              * object and invokes `iteratee` for each property. The iteratee is invoked
+              * with three arguments: (value, key, object). Iteratee functions may exit
+              * iteration early by explicitly returning `false`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.3.0
+              * @category Object
+              * @param {Object} object The object to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Object} Returns `object`.
+              * @see _.forInRight
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.forIn(new Foo, function(value, key) {
+              *   console.log(key);
+              * });
+              * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
+              */
 
-         if (replace) {
-           _cache.rtree.insert(item);
-         }
-       }
 
-       function tokenReplacements(d) {
-         if (!(d instanceof QAItem)) return;
-         var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
-         var replacements = {};
-         var issueTemplate = _krData.errorTypes[d.whichType];
+             function forIn(object, iteratee) {
+               return object == null ? object : baseFor(object, getIteratee(iteratee, 3), keysIn);
+             }
+             /**
+              * This method is like `_.forIn` except that it iterates over properties of
+              * `object` in the opposite order.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @category Object
+              * @param {Object} object The object to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Object} Returns `object`.
+              * @see _.forIn
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.forInRight(new Foo, function(value, key) {
+              *   console.log(key);
+              * });
+              * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
+              */
 
-         if (!issueTemplate) {
-           /* eslint-disable no-console */
-           console.log('No Template: ', d.whichType);
-           console.log('  ', d.description);
-           /* eslint-enable no-console */
 
-           return;
-         } // some descriptions are just fixed text
+             function forInRight(object, iteratee) {
+               return object == null ? object : baseForRight(object, getIteratee(iteratee, 3), keysIn);
+             }
+             /**
+              * Iterates over own enumerable string keyed properties of an object and
+              * invokes `iteratee` for each property. The iteratee is invoked with three
+              * arguments: (value, key, object). Iteratee functions may exit iteration
+              * early by explicitly returning `false`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.3.0
+              * @category Object
+              * @param {Object} object The object to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Object} Returns `object`.
+              * @see _.forOwnRight
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.forOwn(new Foo, function(value, key) {
+              *   console.log(key);
+              * });
+              * // => Logs 'a' then 'b' (iteration order is not guaranteed).
+              */
+
+
+             function forOwn(object, iteratee) {
+               return object && baseForOwn(object, getIteratee(iteratee, 3));
+             }
+             /**
+              * This method is like `_.forOwn` except that it iterates over properties of
+              * `object` in the opposite order.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.0.0
+              * @category Object
+              * @param {Object} object The object to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Object} Returns `object`.
+              * @see _.forOwn
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.forOwnRight(new Foo, function(value, key) {
+              *   console.log(key);
+              * });
+              * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
+              */
+
+
+             function forOwnRight(object, iteratee) {
+               return object && baseForOwnRight(object, getIteratee(iteratee, 3));
+             }
+             /**
+              * Creates an array of function property names from own enumerable properties
+              * of `object`.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Object
+              * @param {Object} object The object to inspect.
+              * @returns {Array} Returns the function names.
+              * @see _.functionsIn
+              * @example
+              *
+              * function Foo() {
+              *   this.a = _.constant('a');
+              *   this.b = _.constant('b');
+              * }
+              *
+              * Foo.prototype.c = _.constant('c');
+              *
+              * _.functions(new Foo);
+              * // => ['a', 'b']
+              */
 
 
-         if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
+             function functions(object) {
+               return object == null ? [] : baseFunctions(object, keys(object));
+             }
+             /**
+              * Creates an array of function property names from own and inherited
+              * enumerable properties of `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Object
+              * @param {Object} object The object to inspect.
+              * @returns {Array} Returns the function names.
+              * @see _.functions
+              * @example
+              *
+              * function Foo() {
+              *   this.a = _.constant('a');
+              *   this.b = _.constant('b');
+              * }
+              *
+              * Foo.prototype.c = _.constant('c');
+              *
+              * _.functionsIn(new Foo);
+              * // => ['a', 'b', 'c']
+              */
 
-         var errorRegex = new RegExp(issueTemplate.regex, 'i');
-         var errorMatch = errorRegex.exec(d.description);
 
-         if (!errorMatch) {
-           /* eslint-disable no-console */
-           console.log('Unmatched: ', d.whichType);
-           console.log('  ', d.description);
-           console.log('  ', errorRegex);
-           /* eslint-enable no-console */
+             function functionsIn(object) {
+               return object == null ? [] : baseFunctions(object, keysIn(object));
+             }
+             /**
+              * Gets the value at `path` of `object`. If the resolved value is
+              * `undefined`, the `defaultValue` is returned in its place.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.7.0
+              * @category Object
+              * @param {Object} object The object to query.
+              * @param {Array|string} path The path of the property to get.
+              * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+              * @returns {*} Returns the resolved value.
+              * @example
+              *
+              * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+              *
+              * _.get(object, 'a[0].b.c');
+              * // => 3
+              *
+              * _.get(object, ['a', '0', 'b', 'c']);
+              * // => 3
+              *
+              * _.get(object, 'a.b.c', 'default');
+              * // => 'default'
+              */
 
-           return;
-         }
 
-         for (var i = 1; i < errorMatch.length; i++) {
-           // skip first
-           var capture = errorMatch[i];
-           var idType = void 0;
-           idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i - 1] : '';
+             function get(object, path, defaultValue) {
+               var result = object == null ? undefined$1 : baseGet(object, path);
+               return result === undefined$1 ? defaultValue : result;
+             }
+             /**
+              * Checks if `path` is a direct property of `object`.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Object
+              * @param {Object} object The object to query.
+              * @param {Array|string} path The path to check.
+              * @returns {boolean} Returns `true` if `path` exists, else `false`.
+              * @example
+              *
+              * var object = { 'a': { 'b': 2 } };
+              * var other = _.create({ 'a': _.create({ 'b': 2 }) });
+              *
+              * _.has(object, 'a');
+              * // => true
+              *
+              * _.has(object, 'a.b');
+              * // => true
+              *
+              * _.has(object, ['a', 'b']);
+              * // => true
+              *
+              * _.has(other, 'a');
+              * // => false
+              */
 
-           if (idType && capture) {
-             // link IDs if present in the capture
-             capture = parseError(capture, idType);
-           } else if (htmlRegex.test(capture)) {
-             // escape any html in non-IDs
-             capture = '\\' + capture + '\\';
-           } else {
-             var compare = capture.toLowerCase();
 
-             if (_krData.localizeStrings[compare]) {
-               // some replacement strings can be localized
-               capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+             function has(object, path) {
+               return object != null && hasPath(object, path, baseHas);
              }
-           }
+             /**
+              * Checks if `path` is a direct or inherited property of `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Object
+              * @param {Object} object The object to query.
+              * @param {Array|string} path The path to check.
+              * @returns {boolean} Returns `true` if `path` exists, else `false`.
+              * @example
+              *
+              * var object = _.create({ 'a': _.create({ 'b': 2 }) });
+              *
+              * _.hasIn(object, 'a');
+              * // => true
+              *
+              * _.hasIn(object, 'a.b');
+              * // => true
+              *
+              * _.hasIn(object, ['a', 'b']);
+              * // => true
+              *
+              * _.hasIn(object, 'b');
+              * // => false
+              */
 
-           replacements['var' + i] = capture;
-         }
 
-         return replacements;
-       }
+             function hasIn(object, path) {
+               return object != null && hasPath(object, path, baseHasIn);
+             }
+             /**
+              * Creates an object composed of the inverted keys and values of `object`.
+              * If `object` contains duplicate values, subsequent values overwrite
+              * property assignments of previous values.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.7.0
+              * @category Object
+              * @param {Object} object The object to invert.
+              * @returns {Object} Returns the new inverted object.
+              * @example
+              *
+              * var object = { 'a': 1, 'b': 2, 'c': 1 };
+              *
+              * _.invert(object);
+              * // => { '1': 'c', '2': 'b' }
+              */
 
-       function parseError(capture, idType) {
-         var compare = capture.toLowerCase();
 
-         if (_krData.localizeStrings[compare]) {
-           // some replacement strings can be localized
-           capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
-         }
+             var invert = createInverter(function (result, value, key) {
+               if (value != null && typeof value.toString != 'function') {
+                 value = nativeObjectToString.call(value);
+               }
 
-         switch (idType) {
-           // link a string like "this node"
-           case 'this':
-             capture = linkErrorObject(capture);
-             break;
+               result[value] = key;
+             }, constant(identity));
+             /**
+              * This method is like `_.invert` except that the inverted object is generated
+              * from the results of running each element of `object` thru `iteratee`. The
+              * corresponding inverted value of each inverted key is an array of keys
+              * responsible for generating the inverted value. The iteratee is invoked
+              * with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.1.0
+              * @category Object
+              * @param {Object} object The object to invert.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {Object} Returns the new inverted object.
+              * @example
+              *
+              * var object = { 'a': 1, 'b': 2, 'c': 1 };
+              *
+              * _.invertBy(object);
+              * // => { '1': ['a', 'c'], '2': ['b'] }
+              *
+              * _.invertBy(object, function(value) {
+              *   return 'group' + value;
+              * });
+              * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
+              */
 
-           case 'url':
-             capture = linkURL(capture);
-             break;
-           // link an entity ID
+             var invertBy = createInverter(function (result, value, key) {
+               if (value != null && typeof value.toString != 'function') {
+                 value = nativeObjectToString.call(value);
+               }
 
-           case 'n':
-           case 'w':
-           case 'r':
-             capture = linkEntity(idType + capture);
-             break;
-           // some errors have more complex ID lists/variance
+               if (hasOwnProperty.call(result, value)) {
+                 result[value].push(key);
+               } else {
+                 result[value] = [key];
+               }
+             }, getIteratee);
+             /**
+              * Invokes the method at `path` of `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Object
+              * @param {Object} object The object to query.
+              * @param {Array|string} path The path of the method to invoke.
+              * @param {...*} [args] The arguments to invoke the method with.
+              * @returns {*} Returns the result of the invoked method.
+              * @example
+              *
+              * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
+              *
+              * _.invoke(object, 'a[0].b.c.slice', 1, 3);
+              * // => [2, 3]
+              */
 
-           case '20':
-             capture = parse20(capture);
-             break;
+             var invoke = baseRest(baseInvoke);
+             /**
+              * Creates an array of the own enumerable property names of `object`.
+              *
+              * **Note:** Non-object values are coerced to objects. See the
+              * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
+              * for more details.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Object
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of property names.
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.keys(new Foo);
+              * // => ['a', 'b'] (iteration order is not guaranteed)
+              *
+              * _.keys('hi');
+              * // => ['0', '1']
+              */
 
-           case '211':
-             capture = parse211(capture);
-             break;
+             function keys(object) {
+               return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
+             }
+             /**
+              * Creates an array of the own and inherited enumerable property names of `object`.
+              *
+              * **Note:** Non-object values are coerced to objects.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Object
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of property names.
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.keysIn(new Foo);
+              * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
+              */
 
-           case '231':
-             capture = parse231(capture);
-             break;
 
-           case '294':
-             capture = parse294(capture);
-             break;
+             function keysIn(object) {
+               return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
+             }
+             /**
+              * The opposite of `_.mapValues`; this method creates an object with the
+              * same values as `object` and keys generated by running each own enumerable
+              * string keyed property of `object` thru `iteratee`. The iteratee is invoked
+              * with three arguments: (value, key, object).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.8.0
+              * @category Object
+              * @param {Object} object The object to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Object} Returns the new mapped object.
+              * @see _.mapValues
+              * @example
+              *
+              * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
+              *   return key + value;
+              * });
+              * // => { 'a1': 1, 'b2': 2 }
+              */
 
-           case '370':
-             capture = parse370(capture);
-             break;
-         }
 
-         return capture;
+             function mapKeys(object, iteratee) {
+               var result = {};
+               iteratee = getIteratee(iteratee, 3);
+               baseForOwn(object, function (value, key, object) {
+                 baseAssignValue(result, iteratee(value, key, object), value);
+               });
+               return result;
+             }
+             /**
+              * Creates an object with the same keys as `object` and values generated
+              * by running each own enumerable string keyed property of `object` thru
+              * `iteratee`. The iteratee is invoked with three arguments:
+              * (value, key, object).
+              *
+              * @static
+              * @memberOf _
+              * @since 2.4.0
+              * @category Object
+              * @param {Object} object The object to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Object} Returns the new mapped object.
+              * @see _.mapKeys
+              * @example
+              *
+              * var users = {
+              *   'fred':    { 'user': 'fred',    'age': 40 },
+              *   'pebbles': { 'user': 'pebbles', 'age': 1 }
+              * };
+              *
+              * _.mapValues(users, function(o) { return o.age; });
+              * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.mapValues(users, 'age');
+              * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
+              */
 
-         function linkErrorObject(d) {
-           return "<a class=\"error_object_link\">".concat(d, "</a>");
-         }
 
-         function linkEntity(d) {
-           return "<a class=\"error_entity_link\">".concat(d, "</a>");
-         }
+             function mapValues(object, iteratee) {
+               var result = {};
+               iteratee = getIteratee(iteratee, 3);
+               baseForOwn(object, function (value, key, object) {
+                 baseAssignValue(result, key, iteratee(value, key, object));
+               });
+               return result;
+             }
+             /**
+              * This method is like `_.assign` except that it recursively merges own and
+              * inherited enumerable string keyed properties of source objects into the
+              * destination object. Source properties that resolve to `undefined` are
+              * skipped if a destination value exists. Array and plain object properties
+              * are merged recursively. Other objects and value types are overridden by
+              * assignment. Source objects are applied from left to right. Subsequent
+              * sources overwrite property assignments of previous sources.
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.5.0
+              * @category Object
+              * @param {Object} object The destination object.
+              * @param {...Object} [sources] The source objects.
+              * @returns {Object} Returns `object`.
+              * @example
+              *
+              * var object = {
+              *   'a': [{ 'b': 2 }, { 'd': 4 }]
+              * };
+              *
+              * var other = {
+              *   'a': [{ 'c': 3 }, { 'e': 5 }]
+              * };
+              *
+              * _.merge(object, other);
+              * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
+              */
 
-         function linkURL(d) {
-           return "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>");
-         } // arbitrary node list of form: #ID, #ID, #ID...
 
+             var merge = createAssigner(function (object, source, srcIndex) {
+               baseMerge(object, source, srcIndex);
+             });
+             /**
+              * This method is like `_.merge` except that it accepts `customizer` which
+              * is invoked to produce the merged values of the destination and source
+              * properties. If `customizer` returns `undefined`, merging is handled by the
+              * method instead. The `customizer` is invoked with six arguments:
+              * (objValue, srcValue, key, object, source, stack).
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Object
+              * @param {Object} object The destination object.
+              * @param {...Object} sources The source objects.
+              * @param {Function} customizer The function to customize assigned values.
+              * @returns {Object} Returns `object`.
+              * @example
+              *
+              * function customizer(objValue, srcValue) {
+              *   if (_.isArray(objValue)) {
+              *     return objValue.concat(srcValue);
+              *   }
+              * }
+              *
+              * var object = { 'a': [1], 'b': [2] };
+              * var other = { 'a': [3], 'b': [4] };
+              *
+              * _.mergeWith(object, other, customizer);
+              * // => { 'a': [1, 3], 'b': [2, 4] }
+              */
 
-         function parse211(capture) {
-           var newList = [];
-           var items = capture.split(', ');
-           items.forEach(function (item) {
-             // ID has # at the front
-             var id = linkEntity('n' + item.slice(1));
-             newList.push(id);
-           });
-           return newList.join(', ');
-         } // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
+             var mergeWith = createAssigner(function (object, source, srcIndex, customizer) {
+               baseMerge(object, source, srcIndex, customizer);
+             });
+             /**
+              * The opposite of `_.pick`; this method creates an object composed of the
+              * own and inherited enumerable property paths of `object` that are not omitted.
+              *
+              * **Note:** This method is considerably slower than `_.pick`.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Object
+              * @param {Object} object The source object.
+              * @param {...(string|string[])} [paths] The property paths to omit.
+              * @returns {Object} Returns the new object.
+              * @example
+              *
+              * var object = { 'a': 1, 'b': '2', 'c': 3 };
+              *
+              * _.omit(object, ['a', 'c']);
+              * // => { 'b': '2' }
+              */
 
+             var omit = flatRest(function (object, paths) {
+               var result = {};
 
-         function parse231(capture) {
-           var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
+               if (object == null) {
+                 return result;
+               }
 
-           var items = capture.split('),');
-           items.forEach(function (item) {
-             var match = item.match(/\#(\d+)\((.+)\)?/);
+               var isDeep = false;
+               paths = arrayMap(paths, function (path) {
+                 path = castPath(path, object);
+                 isDeep || (isDeep = path.length > 1);
+                 return path;
+               });
+               copyObject(object, getAllKeysIn(object), result);
 
-             if (match !== null && match.length > 2) {
-               newList.push(linkEntity('w' + match[1]) + ' ' + _t('QA.keepRight.errorTypes.231.layer', {
-                 layer: match[2]
-               }));
-             }
-           });
-           return newList.join(', ');
-         } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
+               if (isDeep) {
+                 result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
+               }
 
+               var length = paths.length;
 
-         function parse294(capture) {
-           var newList = [];
-           var items = capture.split(',');
-           items.forEach(function (item) {
-             // item of form "from/to node/relation #ID"
-             item = item.split(' '); // to/from role is more clear in quotes
+               while (length--) {
+                 baseUnset(result, paths[length]);
+               }
 
-             var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
+               return result;
+             });
+             /**
+              * The opposite of `_.pickBy`; this method creates an object composed of
+              * the own and inherited enumerable string keyed properties of `object` that
+              * `predicate` doesn't return truthy for. The predicate is invoked with two
+              * arguments: (value, key).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Object
+              * @param {Object} object The source object.
+              * @param {Function} [predicate=_.identity] The function invoked per property.
+              * @returns {Object} Returns the new object.
+              * @example
+              *
+              * var object = { 'a': 1, 'b': '2', 'c': 3 };
+              *
+              * _.omitBy(object, _.isNumber);
+              * // => { 'b': '2' }
+              */
 
-             var idType = item[1].slice(0, 1); // ID has # at the front
+             function omitBy(object, predicate) {
+               return pickBy(object, negate(getIteratee(predicate)));
+             }
+             /**
+              * Creates an object composed of the picked `object` properties.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Object
+              * @param {Object} object The source object.
+              * @param {...(string|string[])} [paths] The property paths to pick.
+              * @returns {Object} Returns the new object.
+              * @example
+              *
+              * var object = { 'a': 1, 'b': '2', 'c': 3 };
+              *
+              * _.pick(object, ['a', 'c']);
+              * // => { 'a': 1, 'c': 3 }
+              */
 
-             var id = item[2].slice(1);
-             id = linkEntity(idType + id);
-             newList.push("".concat(role, " ").concat(item[1], " ").concat(id));
-           });
-           return newList.join(', ');
-         } // may or may not include the string "(including the name 'name')"
 
+             var pick = flatRest(function (object, paths) {
+               return object == null ? {} : basePick(object, paths);
+             });
+             /**
+              * Creates an object composed of the `object` properties `predicate` returns
+              * truthy for. The predicate is invoked with two arguments: (value, key).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Object
+              * @param {Object} object The source object.
+              * @param {Function} [predicate=_.identity] The function invoked per property.
+              * @returns {Object} Returns the new object.
+              * @example
+              *
+              * var object = { 'a': 1, 'b': '2', 'c': 3 };
+              *
+              * _.pickBy(object, _.isNumber);
+              * // => { 'a': 1, 'c': 3 }
+              */
 
-         function parse370(capture) {
-           if (!capture) return '';
-           var match = capture.match(/\(including the name (\'.+\')\)/);
+             function pickBy(object, predicate) {
+               if (object == null) {
+                 return {};
+               }
 
-           if (match && match.length) {
-             return _t('QA.keepRight.errorTypes.370.including_the_name', {
-               name: match[1]
-             });
-           }
+               var props = arrayMap(getAllKeysIn(object), function (prop) {
+                 return [prop];
+               });
+               predicate = getIteratee(predicate);
+               return basePickBy(object, props, function (value, path) {
+                 return predicate(value, path[0]);
+               });
+             }
+             /**
+              * This method is like `_.get` except that if the resolved value is a
+              * function it's invoked with the `this` binding of its parent object and
+              * its result is returned.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Object
+              * @param {Object} object The object to query.
+              * @param {Array|string} path The path of the property to resolve.
+              * @param {*} [defaultValue] The value returned for `undefined` resolved values.
+              * @returns {*} Returns the resolved value.
+              * @example
+              *
+              * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
+              *
+              * _.result(object, 'a[0].b.c1');
+              * // => 3
+              *
+              * _.result(object, 'a[0].b.c2');
+              * // => 4
+              *
+              * _.result(object, 'a[0].b.c3', 'default');
+              * // => 'default'
+              *
+              * _.result(object, 'a[0].b.c3', _.constant('default'));
+              * // => 'default'
+              */
 
-           return '';
-         } // arbitrary node list of form: #ID,#ID,#ID...
 
+             function result(object, path, defaultValue) {
+               path = castPath(path, object);
+               var index = -1,
+                   length = path.length; // Ensure the loop is entered when path is empty.
 
-         function parse20(capture) {
-           var newList = [];
-           var items = capture.split(',');
-           items.forEach(function (item) {
-             // ID has # at the front
-             var id = linkEntity('n' + item.slice(1));
-             newList.push(id);
-           });
-           return newList.join(', ');
-         }
-       }
+               if (!length) {
+                 length = 1;
+                 object = undefined$1;
+               }
 
-       var serviceKeepRight = {
-         title: 'keepRight',
-         init: function init() {
-           _mainFileFetcher.get('keepRight').then(function (d) {
-             return _krData = d;
-           });
+               while (++index < length) {
+                 var value = object == null ? undefined$1 : object[toKey(path[index])];
 
-           if (!_cache) {
-             this.reset();
-           }
+                 if (value === undefined$1) {
+                   index = length;
+                   value = defaultValue;
+                 }
 
-           this.event = utilRebind(this, dispatch$1, 'on');
-         },
-         reset: function reset() {
-           if (_cache) {
-             Object.values(_cache.inflightTile).forEach(abortRequest);
-           }
+                 object = isFunction(value) ? value.call(object) : value;
+               }
 
-           _cache = {
-             data: {},
-             loadedTile: {},
-             inflightTile: {},
-             inflightPost: {},
-             closed: {},
-             rtree: new RBush()
-           };
-         },
-         // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
-         loadIssues: function loadIssues(projection) {
-           var _this = this;
+               return object;
+             }
+             /**
+              * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
+              * it's created. Arrays are created for missing index properties while objects
+              * are created for all other missing properties. Use `_.setWith` to customize
+              * `path` creation.
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.7.0
+              * @category Object
+              * @param {Object} object The object to modify.
+              * @param {Array|string} path The path of the property to set.
+              * @param {*} value The value to set.
+              * @returns {Object} Returns `object`.
+              * @example
+              *
+              * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+              *
+              * _.set(object, 'a[0].b.c', 4);
+              * console.log(object.a[0].b.c);
+              * // => 4
+              *
+              * _.set(object, ['x', '0', 'y', 'z'], 5);
+              * console.log(object.x[0].y.z);
+              * // => 5
+              */
 
-           var options = {
-             format: 'geojson',
-             ch: _krRuleset
-           }; // determine the needed tiles to cover the view
 
-           var tiles = tiler.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
+             function set(object, path, value) {
+               return object == null ? object : baseSet(object, path, value);
+             }
+             /**
+              * This method is like `_.set` except that it accepts `customizer` which is
+              * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
+              * path creation is handled by the method instead. The `customizer` is invoked
+              * with three arguments: (nsValue, key, nsObject).
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Object
+              * @param {Object} object The object to modify.
+              * @param {Array|string} path The path of the property to set.
+              * @param {*} value The value to set.
+              * @param {Function} [customizer] The function to customize assigned values.
+              * @returns {Object} Returns `object`.
+              * @example
+              *
+              * var object = {};
+              *
+              * _.setWith(object, '[0][1]', 'a', Object);
+              * // => { '0': { '1': 'a' } }
+              */
 
-           abortUnwantedRequests(_cache, tiles); // issue new requests..
 
-           tiles.forEach(function (tile) {
-             if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
+             function setWith(object, path, value, customizer) {
+               customizer = typeof customizer == 'function' ? customizer : undefined$1;
+               return object == null ? object : baseSet(object, path, value, customizer);
+             }
+             /**
+              * Creates an array of own enumerable string keyed-value pairs for `object`
+              * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
+              * entries are returned.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @alias entries
+              * @category Object
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the key-value pairs.
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.toPairs(new Foo);
+              * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
+              */
 
-             var _tile$extent$rectangl = tile.extent.rectangle(),
-                 _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
-                 left = _tile$extent$rectangl2[0],
-                 top = _tile$extent$rectangl2[1],
-                 right = _tile$extent$rectangl2[2],
-                 bottom = _tile$extent$rectangl2[3];
 
-             var params = Object.assign({}, options, {
-               left: left,
-               bottom: bottom,
-               right: right,
-               top: top
-             });
-             var url = "".concat(_krUrlRoot, "/export.php?") + utilQsString(params);
-             var controller = new AbortController();
-             _cache.inflightTile[tile.id] = controller;
-             d3_json(url, {
-               signal: controller.signal
-             }).then(function (data) {
-               delete _cache.inflightTile[tile.id];
-               _cache.loadedTile[tile.id] = true;
+             var toPairs = createToPairs(keys);
+             /**
+              * Creates an array of own and inherited enumerable string keyed-value pairs
+              * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
+              * or set, its entries are returned.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @alias entriesIn
+              * @category Object
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the key-value pairs.
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.toPairsIn(new Foo);
+              * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
+              */
 
-               if (!data || !data.features || !data.features.length) {
-                 throw new Error('No Data');
-               }
+             var toPairsIn = createToPairs(keysIn);
+             /**
+              * An alternative to `_.reduce`; this method transforms `object` to a new
+              * `accumulator` object which is the result of running each of its own
+              * enumerable string keyed properties thru `iteratee`, with each invocation
+              * potentially mutating the `accumulator` object. If `accumulator` is not
+              * provided, a new object with the same `[[Prototype]]` will be used. The
+              * iteratee is invoked with four arguments: (accumulator, value, key, object).
+              * Iteratee functions may exit iteration early by explicitly returning `false`.
+              *
+              * @static
+              * @memberOf _
+              * @since 1.3.0
+              * @category Object
+              * @param {Object} object The object to iterate over.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @param {*} [accumulator] The custom accumulator value.
+              * @returns {*} Returns the accumulated value.
+              * @example
+              *
+              * _.transform([2, 3, 4], function(result, n) {
+              *   result.push(n *= n);
+              *   return n % 2 == 0;
+              * }, []);
+              * // => [4, 9]
+              *
+              * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
+              *   (result[value] || (result[value] = [])).push(key);
+              * }, {});
+              * // => { '1': ['a', 'c'], '2': ['b'] }
+              */
 
-               data.features.forEach(function (feature) {
-                 var _feature$properties = feature.properties,
-                     itemType = _feature$properties.error_type,
-                     id = _feature$properties.error_id,
-                     _feature$properties$c = _feature$properties.comment,
-                     comment = _feature$properties$c === void 0 ? null : _feature$properties$c,
-                     objectId = _feature$properties.object_id,
-                     objectType = _feature$properties.object_type,
-                     schema = _feature$properties.schema,
-                     title = _feature$properties.title;
-                 var loc = feature.geometry.coordinates,
-                     _feature$properties$d = feature.properties.description,
-                     description = _feature$properties$d === void 0 ? '' : _feature$properties$d; // if there is a parent, save its error type e.g.:
-                 //  Error 191 = "highway-highway"
-                 //  Error 190 = "intersections without junctions"  (parent)
+             function transform(object, iteratee, accumulator) {
+               var isArr = isArray(object),
+                   isArrLike = isArr || isBuffer(object) || isTypedArray(object);
+               iteratee = getIteratee(iteratee, 4);
 
-                 var issueTemplate = _krData.errorTypes[itemType];
-                 var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
+               if (accumulator == null) {
+                 var Ctor = object && object.constructor;
 
-                 var whichType = issueTemplate ? itemType : parentIssueType;
-                 var whichTemplate = _krData.errorTypes[whichType]; // Rewrite a few of the errors at this point..
-                 // This is done to make them easier to linkify and translate.
+                 if (isArrLike) {
+                   accumulator = isArr ? new Ctor() : [];
+                 } else if (isObject(object)) {
+                   accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
+                 } else {
+                   accumulator = {};
+                 }
+               }
 
-                 switch (whichType) {
-                   case '170':
-                     description = "This feature has a FIXME tag: ".concat(description);
-                     break;
+               (isArrLike ? arrayEach : baseForOwn)(object, function (value, index, object) {
+                 return iteratee(accumulator, value, index, object);
+               });
+               return accumulator;
+             }
+             /**
+              * Removes the property at `path` of `object`.
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Object
+              * @param {Object} object The object to modify.
+              * @param {Array|string} path The path of the property to unset.
+              * @returns {boolean} Returns `true` if the property is deleted, else `false`.
+              * @example
+              *
+              * var object = { 'a': [{ 'b': { 'c': 7 } }] };
+              * _.unset(object, 'a[0].b.c');
+              * // => true
+              *
+              * console.log(object);
+              * // => { 'a': [{ 'b': {} }] };
+              *
+              * _.unset(object, ['a', '0', 'b', 'c']);
+              * // => true
+              *
+              * console.log(object);
+              * // => { 'a': [{ 'b': {} }] };
+              */
 
-                   case '292':
-                   case '293':
-                     description = description.replace('A turn-', 'This turn-');
-                     break;
 
-                   case '294':
-                   case '295':
-                   case '296':
-                   case '297':
-                   case '298':
-                     description = "This turn-restriction~".concat(description);
-                     break;
+             function unset(object, path) {
+               return object == null ? true : baseUnset(object, path);
+             }
+             /**
+              * This method is like `_.set` except that accepts `updater` to produce the
+              * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
+              * is invoked with one argument: (value).
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.6.0
+              * @category Object
+              * @param {Object} object The object to modify.
+              * @param {Array|string} path The path of the property to set.
+              * @param {Function} updater The function to produce the updated value.
+              * @returns {Object} Returns `object`.
+              * @example
+              *
+              * var object = { 'a': [{ 'b': { 'c': 3 } }] };
+              *
+              * _.update(object, 'a[0].b.c', function(n) { return n * n; });
+              * console.log(object.a[0].b.c);
+              * // => 9
+              *
+              * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
+              * console.log(object.x[0].y.z);
+              * // => 0
+              */
 
-                   case '300':
-                     description = 'This highway is missing a maxspeed tag';
-                     break;
 
-                   case '411':
-                   case '412':
-                   case '413':
-                     description = "This feature~".concat(description);
-                     break;
-                 } // move markers slightly so it doesn't obscure the geometry,
-                 // then move markers away from other coincident markers
+             function update(object, path, updater) {
+               return object == null ? object : baseUpdate(object, path, castFunction(updater));
+             }
+             /**
+              * This method is like `_.update` except that it accepts `customizer` which is
+              * invoked to produce the objects of `path`.  If `customizer` returns `undefined`
+              * path creation is handled by the method instead. The `customizer` is invoked
+              * with three arguments: (nsValue, key, nsObject).
+              *
+              * **Note:** This method mutates `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.6.0
+              * @category Object
+              * @param {Object} object The object to modify.
+              * @param {Array|string} path The path of the property to set.
+              * @param {Function} updater The function to produce the updated value.
+              * @param {Function} [customizer] The function to customize assigned values.
+              * @returns {Object} Returns `object`.
+              * @example
+              *
+              * var object = {};
+              *
+              * _.updateWith(object, '[0][1]', _.constant('a'), Object);
+              * // => { '0': { '1': 'a' } }
+              */
 
 
-                 var coincident = false;
+             function updateWith(object, path, updater, customizer) {
+               customizer = typeof customizer == 'function' ? customizer : undefined$1;
+               return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
+             }
+             /**
+              * Creates an array of the own enumerable string keyed property values of `object`.
+              *
+              * **Note:** Non-object values are coerced to objects.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Object
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of property values.
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.values(new Foo);
+              * // => [1, 2] (iteration order is not guaranteed)
+              *
+              * _.values('hi');
+              * // => ['h', 'i']
+              */
 
-                 do {
-                   // first time, move marker up. after that, move marker right.
-                   var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-                   loc = geoVecAdd(loc, delta);
-                   var bbox = geoExtent(loc).bbox();
-                   coincident = _cache.rtree.search(bbox).length;
-                 } while (coincident);
 
-                 var d = new QAItem(loc, _this, itemType, id, {
-                   comment: comment,
-                   description: description,
-                   whichType: whichType,
-                   parentIssueType: parentIssueType,
-                   severity: whichTemplate.severity || 'error',
-                   objectId: objectId,
-                   objectType: objectType,
-                   schema: schema,
-                   title: title
-                 });
-                 d.replacements = tokenReplacements(d);
-                 _cache.data[id] = d;
+             function values(object) {
+               return object == null ? [] : baseValues(object, keys(object));
+             }
+             /**
+              * Creates an array of the own and inherited enumerable string keyed property
+              * values of `object`.
+              *
+              * **Note:** Non-object values are coerced to objects.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Object
+              * @param {Object} object The object to query.
+              * @returns {Array} Returns the array of property values.
+              * @example
+              *
+              * function Foo() {
+              *   this.a = 1;
+              *   this.b = 2;
+              * }
+              *
+              * Foo.prototype.c = 3;
+              *
+              * _.valuesIn(new Foo);
+              * // => [1, 2, 3] (iteration order is not guaranteed)
+              */
 
-                 _cache.rtree.insert(encodeIssueRtree(d));
-               });
-               dispatch$1.call('loaded');
-             })["catch"](function () {
-               delete _cache.inflightTile[tile.id];
-               _cache.loadedTile[tile.id] = true;
-             });
-           });
-         },
-         postUpdate: function postUpdate(d, callback) {
-           var _this2 = this;
 
-           if (_cache.inflightPost[d.id]) {
-             return callback({
-               message: 'Error update already inflight',
-               status: -2
-             }, d);
-           }
+             function valuesIn(object) {
+               return object == null ? [] : baseValues(object, keysIn(object));
+             }
+             /*------------------------------------------------------------------------*/
 
-           var params = {
-             schema: d.schema,
-             id: d.id
-           };
+             /**
+              * Clamps `number` within the inclusive `lower` and `upper` bounds.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Number
+              * @param {number} number The number to clamp.
+              * @param {number} [lower] The lower bound.
+              * @param {number} upper The upper bound.
+              * @returns {number} Returns the clamped number.
+              * @example
+              *
+              * _.clamp(-10, -5, 5);
+              * // => -5
+              *
+              * _.clamp(10, -5, 5);
+              * // => 5
+              */
 
-           if (d.newStatus) {
-             params.st = d.newStatus;
-           }
 
-           if (d.newComment !== undefined) {
-             params.co = d.newComment;
-           } // NOTE: This throws a CORS err, but it seems successful.
-           // We don't care too much about the response, so this is fine.
+             function clamp(number, lower, upper) {
+               if (upper === undefined$1) {
+                 upper = lower;
+                 lower = undefined$1;
+               }
 
+               if (upper !== undefined$1) {
+                 upper = toNumber(upper);
+                 upper = upper === upper ? upper : 0;
+               }
 
-           var url = "".concat(_krUrlRoot, "/comment.php?") + utilQsString(params);
-           var controller = new AbortController();
-           _cache.inflightPost[d.id] = controller; // Since this is expected to throw an error just continue as if it worked
-           // (worst case scenario the request truly fails and issue will show up if iD restarts)
+               if (lower !== undefined$1) {
+                 lower = toNumber(lower);
+                 lower = lower === lower ? lower : 0;
+               }
 
-           d3_json(url, {
-             signal: controller.signal
-           })["finally"](function () {
-             delete _cache.inflightPost[d.id];
+               return baseClamp(toNumber(number), lower, upper);
+             }
+             /**
+              * Checks if `n` is between `start` and up to, but not including, `end`. If
+              * `end` is not specified, it's set to `start` with `start` then set to `0`.
+              * If `start` is greater than `end` the params are swapped to support
+              * negative ranges.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.3.0
+              * @category Number
+              * @param {number} number The number to check.
+              * @param {number} [start=0] The start of the range.
+              * @param {number} end The end of the range.
+              * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
+              * @see _.range, _.rangeRight
+              * @example
+              *
+              * _.inRange(3, 2, 4);
+              * // => true
+              *
+              * _.inRange(4, 8);
+              * // => true
+              *
+              * _.inRange(4, 2);
+              * // => false
+              *
+              * _.inRange(2, 2);
+              * // => false
+              *
+              * _.inRange(1.2, 2);
+              * // => true
+              *
+              * _.inRange(5.2, 4);
+              * // => false
+              *
+              * _.inRange(-3, -2, -6);
+              * // => true
+              */
 
-             if (d.newStatus === 'ignore') {
-               // ignore permanently (false positive)
-               _this2.removeItem(d);
-             } else if (d.newStatus === 'ignore_t') {
-               // ignore temporarily (error fixed)
-               _this2.removeItem(d);
 
-               _cache.closed["".concat(d.schema, ":").concat(d.id)] = true;
-             } else {
-               d = _this2.replaceItem(d.update({
-                 comment: d.newComment,
-                 newComment: undefined,
-                 newState: undefined
-               }));
+             function inRange(number, start, end) {
+               start = toFinite(start);
+
+               if (end === undefined$1) {
+                 end = start;
+                 start = 0;
+               } else {
+                 end = toFinite(end);
+               }
+
+               number = toNumber(number);
+               return baseInRange(number, start, end);
              }
+             /**
+              * Produces a random number between the inclusive `lower` and `upper` bounds.
+              * If only one argument is provided a number between `0` and the given number
+              * is returned. If `floating` is `true`, or either `lower` or `upper` are
+              * floats, a floating-point number is returned instead of an integer.
+              *
+              * **Note:** JavaScript follows the IEEE-754 standard for resolving
+              * floating-point values which can produce unexpected results.
+              *
+              * @static
+              * @memberOf _
+              * @since 0.7.0
+              * @category Number
+              * @param {number} [lower=0] The lower bound.
+              * @param {number} [upper=1] The upper bound.
+              * @param {boolean} [floating] Specify returning a floating-point number.
+              * @returns {number} Returns the random number.
+              * @example
+              *
+              * _.random(0, 5);
+              * // => an integer between 0 and 5
+              *
+              * _.random(5);
+              * // => also an integer between 0 and 5
+              *
+              * _.random(5, true);
+              * // => a floating-point number between 0 and 5
+              *
+              * _.random(1.2, 5.2);
+              * // => a floating-point number between 1.2 and 5.2
+              */
 
-             if (callback) callback(null, d);
-           });
-         },
-         // Get all cached QAItems covering the viewport
-         getItems: function getItems(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-           return _cache.rtree.search(bbox).map(function (d) {
-             return d.data;
-           });
-         },
-         // Get a QAItem from cache
-         // NOTE: Don't change method name until UI v3 is merged
-         getError: function getError(id) {
-           return _cache.data[id];
-         },
-         // Replace a single QAItem in the cache
-         replaceItem: function replaceItem(item) {
-           if (!(item instanceof QAItem) || !item.id) return;
-           _cache.data[item.id] = item;
-           updateRtree(encodeIssueRtree(item), true); // true = replace
 
-           return item;
-         },
-         // Remove a single QAItem from the cache
-         removeItem: function removeItem(item) {
-           if (!(item instanceof QAItem) || !item.id) return;
-           delete _cache.data[item.id];
-           updateRtree(encodeIssueRtree(item), false); // false = remove
-         },
-         issueURL: function issueURL(item) {
-           return "".concat(_krUrlRoot, "/report_map.php?schema=").concat(item.schema, "&error=").concat(item.id);
-         },
-         // Get an array of issues closed during this session.
-         // Used to populate `closed:keepright` changeset tag
-         getClosedIDs: function getClosedIDs() {
-           return Object.keys(_cache.closed).sort();
-         }
-       };
+             function random(lower, upper, floating) {
+               if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
+                 upper = floating = undefined$1;
+               }
 
-       var tiler$1 = utilTiler();
-       var dispatch$2 = dispatch('loaded');
-       var _tileZoom$1 = 14;
-       var _impOsmUrls = {
-         ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
-         mr: 'https://grab.community.improve-osm.org/missingGeoService',
-         tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
-       };
-       var _impOsmData = {
-         icons: {}
-       }; // This gets reassigned if reset
+               if (floating === undefined$1) {
+                 if (typeof upper == 'boolean') {
+                   floating = upper;
+                   upper = undefined$1;
+                 } else if (typeof lower == 'boolean') {
+                   floating = lower;
+                   lower = undefined$1;
+                 }
+               }
 
-       var _cache$1;
+               if (lower === undefined$1 && upper === undefined$1) {
+                 lower = 0;
+                 upper = 1;
+               } else {
+                 lower = toFinite(lower);
 
-       function abortRequest$1(i) {
-         Object.values(i).forEach(function (controller) {
-           if (controller) {
-             controller.abort();
-           }
-         });
-       }
+                 if (upper === undefined$1) {
+                   upper = lower;
+                   lower = 0;
+                 } else {
+                   upper = toFinite(upper);
+                 }
+               }
 
-       function abortUnwantedRequests$1(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k === tile.id;
-           });
+               if (lower > upper) {
+                 var temp = lower;
+                 lower = upper;
+                 upper = temp;
+               }
 
-           if (!wanted) {
-             abortRequest$1(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
-           }
-         });
-       }
+               if (floating || lower % 1 || upper % 1) {
+                 var rand = nativeRandom();
+                 return nativeMin(lower + rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1))), upper);
+               }
 
-       function encodeIssueRtree$1(d) {
-         return {
-           minX: d.loc[0],
-           minY: d.loc[1],
-           maxX: d.loc[0],
-           maxY: d.loc[1],
-           data: d
-         };
-       } // Replace or remove QAItem from rtree
+               return baseRandom(lower, upper);
+             }
+             /*------------------------------------------------------------------------*/
 
+             /**
+              * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the camel cased string.
+              * @example
+              *
+              * _.camelCase('Foo Bar');
+              * // => 'fooBar'
+              *
+              * _.camelCase('--foo-bar--');
+              * // => 'fooBar'
+              *
+              * _.camelCase('__FOO_BAR__');
+              * // => 'fooBar'
+              */
 
-       function updateRtree$1(item, replace) {
-         _cache$1.rtree.remove(item, function (a, b) {
-           return a.data.id === b.data.id;
-         });
 
-         if (replace) {
-           _cache$1.rtree.insert(item);
-         }
-       }
+             var camelCase = createCompounder(function (result, word, index) {
+               word = word.toLowerCase();
+               return result + (index ? capitalize(word) : word);
+             });
+             /**
+              * Converts the first character of `string` to upper case and the remaining
+              * to lower case.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to capitalize.
+              * @returns {string} Returns the capitalized string.
+              * @example
+              *
+              * _.capitalize('FRED');
+              * // => 'Fred'
+              */
 
-       function linkErrorObject(d) {
-         return "<a class=\"error_object_link\">".concat(d, "</a>");
-       }
+             function capitalize(string) {
+               return upperFirst(toString(string).toLowerCase());
+             }
+             /**
+              * Deburrs `string` by converting
+              * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
+              * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
+              * letters to basic Latin letters and removing
+              * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to deburr.
+              * @returns {string} Returns the deburred string.
+              * @example
+              *
+              * _.deburr('déjà vu');
+              * // => 'deja vu'
+              */
 
-       function linkEntity(d) {
-         return "<a class=\"error_entity_link\">".concat(d, "</a>");
-       }
 
-       function pointAverage(points) {
-         if (points.length) {
-           var sum = points.reduce(function (acc, point) {
-             return geoVecAdd(acc, [point.lon, point.lat]);
-           }, [0, 0]);
-           return geoVecScale(sum, 1 / points.length);
-         } else {
-           return [0, 0];
-         }
-       }
+             function deburr(string) {
+               string = toString(string);
+               return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
+             }
+             /**
+              * Checks if `string` ends with the given target string.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to inspect.
+              * @param {string} [target] The string to search for.
+              * @param {number} [position=string.length] The position to search up to.
+              * @returns {boolean} Returns `true` if `string` ends with `target`,
+              *  else `false`.
+              * @example
+              *
+              * _.endsWith('abc', 'c');
+              * // => true
+              *
+              * _.endsWith('abc', 'b');
+              * // => false
+              *
+              * _.endsWith('abc', 'b', 2);
+              * // => true
+              */
 
-       function relativeBearing(p1, p2) {
-         var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
 
-         if (angle < 0) {
-           angle += 2 * Math.PI;
-         } // Return degrees
+             function endsWith(string, target, position) {
+               string = toString(string);
+               target = baseToString(target);
+               var length = string.length;
+               position = position === undefined$1 ? length : baseClamp(toInteger(position), 0, length);
+               var end = position;
+               position -= target.length;
+               return position >= 0 && string.slice(position, end) == target;
+             }
+             /**
+              * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
+              * corresponding HTML entities.
+              *
+              * **Note:** No other characters are escaped. To escape additional
+              * characters use a third-party library like [_he_](https://mths.be/he).
+              *
+              * Though the ">" character is escaped for symmetry, characters like
+              * ">" and "/" don't need escaping in HTML and have no special meaning
+              * unless they're part of a tag or unquoted attribute value. See
+              * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
+              * (under "semi-related fun fact") for more details.
+              *
+              * When working with HTML you should always
+              * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
+              * XSS vectors.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category String
+              * @param {string} [string=''] The string to escape.
+              * @returns {string} Returns the escaped string.
+              * @example
+              *
+              * _.escape('fred, barney, & pebbles');
+              * // => 'fred, barney, &amp; pebbles'
+              */
 
 
-         return angle * 180 / Math.PI;
-       } // Assuming range [0,360)
+             function escape(string) {
+               string = toString(string);
+               return string && reHasUnescapedHtml.test(string) ? string.replace(reUnescapedHtml, escapeHtmlChar) : string;
+             }
+             /**
+              * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
+              * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to escape.
+              * @returns {string} Returns the escaped string.
+              * @example
+              *
+              * _.escapeRegExp('[lodash](https://lodash.com/)');
+              * // => '\[lodash\]\(https://lodash\.com/\)'
+              */
 
 
-       function cardinalDirection(bearing) {
-         var dir = 45 * Math.round(bearing / 45);
-         var compass = {
-           0: 'north',
-           45: 'northeast',
-           90: 'east',
-           135: 'southeast',
-           180: 'south',
-           225: 'southwest',
-           270: 'west',
-           315: 'northwest',
-           360: 'north'
-         };
-         return _t("QA.improveOSM.directions.".concat(compass[dir]));
-       } // Errors shouldn't obscure each other
+             function escapeRegExp(string) {
+               string = toString(string);
+               return string && reHasRegExpChar.test(string) ? string.replace(reRegExpChar, '\\$&') : string;
+             }
+             /**
+              * Converts `string` to
+              * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the kebab cased string.
+              * @example
+              *
+              * _.kebabCase('Foo Bar');
+              * // => 'foo-bar'
+              *
+              * _.kebabCase('fooBar');
+              * // => 'foo-bar'
+              *
+              * _.kebabCase('__FOO_BAR__');
+              * // => 'foo-bar'
+              */
 
 
-       function preventCoincident(loc, bumpUp) {
-         var coincident = false;
+             var kebabCase = createCompounder(function (result, word, index) {
+               return result + (index ? '-' : '') + word.toLowerCase();
+             });
+             /**
+              * Converts `string`, as space separated words, to lower case.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the lower cased string.
+              * @example
+              *
+              * _.lowerCase('--Foo-Bar--');
+              * // => 'foo bar'
+              *
+              * _.lowerCase('fooBar');
+              * // => 'foo bar'
+              *
+              * _.lowerCase('__FOO_BAR__');
+              * // => 'foo bar'
+              */
 
-         do {
-           // first time, move marker up. after that, move marker right.
-           var delta = coincident ? [0.00001, 0] : bumpUp ? [0, 0.00001] : [0, 0];
-           loc = geoVecAdd(loc, delta);
-           var bbox = geoExtent(loc).bbox();
-           coincident = _cache$1.rtree.search(bbox).length;
-         } while (coincident);
+             var lowerCase = createCompounder(function (result, word, index) {
+               return result + (index ? ' ' : '') + word.toLowerCase();
+             });
+             /**
+              * Converts the first character of `string` to lower case.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the converted string.
+              * @example
+              *
+              * _.lowerFirst('Fred');
+              * // => 'fred'
+              *
+              * _.lowerFirst('FRED');
+              * // => 'fRED'
+              */
 
-         return loc;
-       }
+             var lowerFirst = createCaseFirst('toLowerCase');
+             /**
+              * Pads `string` on the left and right sides if it's shorter than `length`.
+              * Padding characters are truncated if they can't be evenly divided by `length`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to pad.
+              * @param {number} [length=0] The padding length.
+              * @param {string} [chars=' '] The string used as padding.
+              * @returns {string} Returns the padded string.
+              * @example
+              *
+              * _.pad('abc', 8);
+              * // => '  abc   '
+              *
+              * _.pad('abc', 8, '_-');
+              * // => '_-abc_-_'
+              *
+              * _.pad('abc', 3);
+              * // => 'abc'
+              */
 
-       var serviceImproveOSM = {
-         title: 'improveOSM',
-         init: function init() {
-           _mainFileFetcher.get('qa_data').then(function (d) {
-             return _impOsmData = d.improveOSM;
-           });
+             function pad(string, length, chars) {
+               string = toString(string);
+               length = toInteger(length);
+               var strLength = length ? stringSize(string) : 0;
 
-           if (!_cache$1) {
-             this.reset();
-           }
+               if (!length || strLength >= length) {
+                 return string;
+               }
 
-           this.event = utilRebind(this, dispatch$2, 'on');
-         },
-         reset: function reset() {
-           if (_cache$1) {
-             Object.values(_cache$1.inflightTile).forEach(abortRequest$1);
-           }
+               var mid = (length - strLength) / 2;
+               return createPadding(nativeFloor(mid), chars) + string + createPadding(nativeCeil(mid), chars);
+             }
+             /**
+              * Pads `string` on the right side if it's shorter than `length`. Padding
+              * characters are truncated if they exceed `length`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to pad.
+              * @param {number} [length=0] The padding length.
+              * @param {string} [chars=' '] The string used as padding.
+              * @returns {string} Returns the padded string.
+              * @example
+              *
+              * _.padEnd('abc', 6);
+              * // => 'abc   '
+              *
+              * _.padEnd('abc', 6, '_-');
+              * // => 'abc_-_'
+              *
+              * _.padEnd('abc', 3);
+              * // => 'abc'
+              */
 
-           _cache$1 = {
-             data: {},
-             loadedTile: {},
-             inflightTile: {},
-             inflightPost: {},
-             closed: {},
-             rtree: new RBush()
-           };
-         },
-         loadIssues: function loadIssues(projection) {
-           var _this = this;
 
-           var options = {
-             client: 'iD',
-             status: 'OPEN',
-             zoom: '19' // Use a high zoom so that clusters aren't returned
+             function padEnd(string, length, chars) {
+               string = toString(string);
+               length = toInteger(length);
+               var strLength = length ? stringSize(string) : 0;
+               return length && strLength < length ? string + createPadding(length - strLength, chars) : string;
+             }
+             /**
+              * Pads `string` on the left side if it's shorter than `length`. Padding
+              * characters are truncated if they exceed `length`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to pad.
+              * @param {number} [length=0] The padding length.
+              * @param {string} [chars=' '] The string used as padding.
+              * @returns {string} Returns the padded string.
+              * @example
+              *
+              * _.padStart('abc', 6);
+              * // => '   abc'
+              *
+              * _.padStart('abc', 6, '_-');
+              * // => '_-_abc'
+              *
+              * _.padStart('abc', 3);
+              * // => 'abc'
+              */
 
-           }; // determine the needed tiles to cover the view
 
-           var tiles = tiler$1.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
+             function padStart(string, length, chars) {
+               string = toString(string);
+               length = toInteger(length);
+               var strLength = length ? stringSize(string) : 0;
+               return length && strLength < length ? createPadding(length - strLength, chars) + string : string;
+             }
+             /**
+              * Converts `string` to an integer of the specified radix. If `radix` is
+              * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
+              * hexadecimal, in which case a `radix` of `16` is used.
+              *
+              * **Note:** This method aligns with the
+              * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
+              *
+              * @static
+              * @memberOf _
+              * @since 1.1.0
+              * @category String
+              * @param {string} string The string to convert.
+              * @param {number} [radix=10] The radix to interpret `value` by.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {number} Returns the converted integer.
+              * @example
+              *
+              * _.parseInt('08');
+              * // => 8
+              *
+              * _.map(['6', '08', '10'], _.parseInt);
+              * // => [6, 8, 10]
+              */
 
-           abortUnwantedRequests$1(_cache$1, tiles); // issue new requests..
 
-           tiles.forEach(function (tile) {
-             if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
+             function parseInt(string, radix, guard) {
+               if (guard || radix == null) {
+                 radix = 0;
+               } else if (radix) {
+                 radix = +radix;
+               }
 
-             var _tile$extent$rectangl = tile.extent.rectangle(),
-                 _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
-                 east = _tile$extent$rectangl2[0],
-                 north = _tile$extent$rectangl2[1],
-                 west = _tile$extent$rectangl2[2],
-                 south = _tile$extent$rectangl2[3];
+               return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
+             }
+             /**
+              * Repeats the given string `n` times.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to repeat.
+              * @param {number} [n=1] The number of times to repeat the string.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {string} Returns the repeated string.
+              * @example
+              *
+              * _.repeat('*', 3);
+              * // => '***'
+              *
+              * _.repeat('abc', 2);
+              * // => 'abcabc'
+              *
+              * _.repeat('abc', 0);
+              * // => ''
+              */
 
-             var params = Object.assign({}, options, {
-               east: east,
-               south: south,
-               west: west,
-               north: north
-             }); // 3 separate requests to store for each tile
 
-             var requests = {};
-             Object.keys(_impOsmUrls).forEach(function (k) {
-               // We exclude WATER from missing geometry as it doesn't seem useful
-               // We use most confident one-way and turn restrictions only, still have false positives
-               var kParams = Object.assign({}, params, k === 'mr' ? {
-                 type: 'PARKING,ROAD,BOTH,PATH'
-               } : {
-                 confidenceLevel: 'C1'
-               });
-               var url = "".concat(_impOsmUrls[k], "/search?") + utilQsString(kParams);
-               var controller = new AbortController();
-               requests[k] = controller;
-               d3_json(url, {
-                 signal: controller.signal
-               }).then(function (data) {
-                 delete _cache$1.inflightTile[tile.id][k];
+             function repeat(string, n, guard) {
+               if (guard ? isIterateeCall(string, n, guard) : n === undefined$1) {
+                 n = 1;
+               } else {
+                 n = toInteger(n);
+               }
 
-                 if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-                   delete _cache$1.inflightTile[tile.id];
-                   _cache$1.loadedTile[tile.id] = true;
-                 } // Road segments at high zoom == oneways
+               return baseRepeat(toString(string), n);
+             }
+             /**
+              * Replaces matches for `pattern` in `string` with `replacement`.
+              *
+              * **Note:** This method is based on
+              * [`String#replace`](https://mdn.io/String/replace).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to modify.
+              * @param {RegExp|string} pattern The pattern to replace.
+              * @param {Function|string} replacement The match replacement.
+              * @returns {string} Returns the modified string.
+              * @example
+              *
+              * _.replace('Hi Fred', 'Fred', 'Barney');
+              * // => 'Hi Barney'
+              */
 
 
-                 if (data.roadSegments) {
-                   data.roadSegments.forEach(function (feature) {
-                     // Position error at the approximate middle of the segment
-                     var points = feature.points,
-                         wayId = feature.wayId,
-                         fromNodeId = feature.fromNodeId,
-                         toNodeId = feature.toNodeId;
-                     var itemId = "".concat(wayId).concat(fromNodeId).concat(toNodeId);
-                     var mid = points.length / 2;
-                     var loc; // Even number of points, find midpoint of the middle two
-                     // Odd number of points, use position of very middle point
+             function replace() {
+               var args = arguments,
+                   string = toString(args[0]);
+               return args.length < 3 ? string : string.replace(args[1], args[2]);
+             }
+             /**
+              * Converts `string` to
+              * [snake case](https://en.wikipedia.org/wiki/Snake_case).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the snake cased string.
+              * @example
+              *
+              * _.snakeCase('Foo Bar');
+              * // => 'foo_bar'
+              *
+              * _.snakeCase('fooBar');
+              * // => 'foo_bar'
+              *
+              * _.snakeCase('--FOO-BAR--');
+              * // => 'foo_bar'
+              */
 
-                     if (mid % 1 === 0) {
-                       loc = pointAverage([points[mid - 1], points[mid]]);
-                     } else {
-                       mid = points[Math.floor(mid)];
-                       loc = [mid.lon, mid.lat];
-                     } // One-ways can land on same segment in opposite direction
 
+             var snakeCase = createCompounder(function (result, word, index) {
+               return result + (index ? '_' : '') + word.toLowerCase();
+             });
+             /**
+              * Splits `string` by `separator`.
+              *
+              * **Note:** This method is based on
+              * [`String#split`](https://mdn.io/String/split).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to split.
+              * @param {RegExp|string} separator The separator pattern to split by.
+              * @param {number} [limit] The length to truncate results to.
+              * @returns {Array} Returns the string segments.
+              * @example
+              *
+              * _.split('a-b-c', '-', 2);
+              * // => ['a', 'b']
+              */
 
-                     loc = preventCoincident(loc, false);
-                     var d = new QAItem(loc, _this, k, itemId, {
-                       issueKey: k,
-                       // used as a category
-                       identifier: {
-                         // used to post changes
-                         wayId: wayId,
-                         fromNodeId: fromNodeId,
-                         toNodeId: toNodeId
-                       },
-                       objectId: wayId,
-                       objectType: 'way'
-                     }); // Variables used in the description
+             function split(string, separator, limit) {
+               if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
+                 separator = limit = undefined$1;
+               }
 
-                     d.replacements = {
-                       percentage: feature.percentOfTrips,
-                       num_trips: feature.numberOfTrips,
-                       highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
-                       from_node: linkEntity('n' + feature.fromNodeId),
-                       to_node: linkEntity('n' + feature.toNodeId)
-                     };
-                     _cache$1.data[d.id] = d;
+               limit = limit === undefined$1 ? MAX_ARRAY_LENGTH : limit >>> 0;
 
-                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
-                   });
-                 } // Tiles at high zoom == missing roads
+               if (!limit) {
+                 return [];
+               }
 
+               string = toString(string);
 
-                 if (data.tiles) {
-                   data.tiles.forEach(function (feature) {
-                     var type = feature.type,
-                         x = feature.x,
-                         y = feature.y,
-                         numberOfTrips = feature.numberOfTrips;
-                     var geoType = type.toLowerCase();
-                     var itemId = "".concat(geoType).concat(x).concat(y).concat(numberOfTrips); // Average of recorded points should land on the missing geometry
-                     // Missing geometry could happen to land on another error
+               if (string && (typeof separator == 'string' || separator != null && !isRegExp(separator))) {
+                 separator = baseToString(separator);
 
-                     var loc = pointAverage(feature.points);
-                     loc = preventCoincident(loc, false);
-                     var d = new QAItem(loc, _this, "".concat(k, "-").concat(geoType), itemId, {
-                       issueKey: k,
-                       identifier: {
-                         x: x,
-                         y: y
-                       }
-                     });
-                     d.replacements = {
-                       num_trips: numberOfTrips,
-                       geometry_type: _t("QA.improveOSM.geometry_types.".concat(geoType))
-                     }; // -1 trips indicates data came from a 3rd party
+                 if (!separator && hasUnicode(string)) {
+                   return castSlice(stringToArray(string), 0, limit);
+                 }
+               }
 
-                     if (numberOfTrips === -1) {
-                       d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
-                     }
+               return string.split(separator, limit);
+             }
+             /**
+              * Converts `string` to
+              * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
+              *
+              * @static
+              * @memberOf _
+              * @since 3.1.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the start cased string.
+              * @example
+              *
+              * _.startCase('--foo-bar--');
+              * // => 'Foo Bar'
+              *
+              * _.startCase('fooBar');
+              * // => 'Foo Bar'
+              *
+              * _.startCase('__FOO_BAR__');
+              * // => 'FOO BAR'
+              */
 
-                     _cache$1.data[d.id] = d;
 
-                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
-                   });
-                 } // Entities at high zoom == turn restrictions
+             var startCase = createCompounder(function (result, word, index) {
+               return result + (index ? ' ' : '') + upperFirst(word);
+             });
+             /**
+              * Checks if `string` starts with the given target string.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to inspect.
+              * @param {string} [target] The string to search for.
+              * @param {number} [position=0] The position to search from.
+              * @returns {boolean} Returns `true` if `string` starts with `target`,
+              *  else `false`.
+              * @example
+              *
+              * _.startsWith('abc', 'a');
+              * // => true
+              *
+              * _.startsWith('abc', 'b');
+              * // => false
+              *
+              * _.startsWith('abc', 'b', 1);
+              * // => true
+              */
+
+             function startsWith(string, target, position) {
+               string = toString(string);
+               position = position == null ? 0 : baseClamp(toInteger(position), 0, string.length);
+               target = baseToString(target);
+               return string.slice(position, position + target.length) == target;
+             }
+             /**
+              * Creates a compiled template function that can interpolate data properties
+              * in "interpolate" delimiters, HTML-escape interpolated data properties in
+              * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
+              * properties may be accessed as free variables in the template. If a setting
+              * object is given, it takes precedence over `_.templateSettings` values.
+              *
+              * **Note:** In the development build `_.template` utilizes
+              * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
+              * for easier debugging.
+              *
+              * For more information on precompiling templates see
+              * [lodash's custom builds documentation](https://lodash.com/custom-builds).
+              *
+              * For more information on Chrome extension sandboxes see
+              * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category String
+              * @param {string} [string=''] The template string.
+              * @param {Object} [options={}] The options object.
+              * @param {RegExp} [options.escape=_.templateSettings.escape]
+              *  The HTML "escape" delimiter.
+              * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
+              *  The "evaluate" delimiter.
+              * @param {Object} [options.imports=_.templateSettings.imports]
+              *  An object to import into the template as free variables.
+              * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
+              *  The "interpolate" delimiter.
+              * @param {string} [options.sourceURL='lodash.templateSources[n]']
+              *  The sourceURL of the compiled template.
+              * @param {string} [options.variable='obj']
+              *  The data object variable name.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Function} Returns the compiled template function.
+              * @example
+              *
+              * // Use the "interpolate" delimiter to create a compiled template.
+              * var compiled = _.template('hello <%= user %>!');
+              * compiled({ 'user': 'fred' });
+              * // => 'hello fred!'
+              *
+              * // Use the HTML "escape" delimiter to escape data property values.
+              * var compiled = _.template('<b><%- value %></b>');
+              * compiled({ 'value': '<script>' });
+              * // => '<b>&lt;script&gt;</b>'
+              *
+              * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
+              * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
+              * compiled({ 'users': ['fred', 'barney'] });
+              * // => '<li>fred</li><li>barney</li>'
+              *
+              * // Use the internal `print` function in "evaluate" delimiters.
+              * var compiled = _.template('<% print("hello " + user); %>!');
+              * compiled({ 'user': 'barney' });
+              * // => 'hello barney!'
+              *
+              * // Use the ES template literal delimiter as an "interpolate" delimiter.
+              * // Disable support by replacing the "interpolate" delimiter.
+              * var compiled = _.template('hello ${ user }!');
+              * compiled({ 'user': 'pebbles' });
+              * // => 'hello pebbles!'
+              *
+              * // Use backslashes to treat delimiters as plain text.
+              * var compiled = _.template('<%= "\\<%- value %\\>" %>');
+              * compiled({ 'value': 'ignored' });
+              * // => '<%- value %>'
+              *
+              * // Use the `imports` option to import `jQuery` as `jq`.
+              * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
+              * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
+              * compiled({ 'users': ['fred', 'barney'] });
+              * // => '<li>fred</li><li>barney</li>'
+              *
+              * // Use the `sourceURL` option to specify a custom sourceURL for the template.
+              * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
+              * compiled(data);
+              * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
+              *
+              * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
+              * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
+              * compiled.source;
+              * // => function(data) {
+              * //   var __t, __p = '';
+              * //   __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
+              * //   return __p;
+              * // }
+              *
+              * // Use custom template delimiters.
+              * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
+              * var compiled = _.template('hello {{ user }}!');
+              * compiled({ 'user': 'mustache' });
+              * // => 'hello mustache!'
+              *
+              * // Use the `source` property to inline compiled templates for meaningful
+              * // line numbers in error messages and stack traces.
+              * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
+              *   var JST = {\
+              *     "main": ' + _.template(mainText).source + '\
+              *   };\
+              * ');
+              */
 
 
-                 if (data.entities) {
-                   data.entities.forEach(function (feature) {
-                     var point = feature.point,
-                         id = feature.id,
-                         segments = feature.segments,
-                         numberOfPasses = feature.numberOfPasses,
-                         turnType = feature.turnType;
-                     var itemId = "".concat(id.replace(/[,:+#]/g, '_')); // Turn restrictions could be missing at same junction
-                     // We also want to bump the error up so node is accessible
+             function template(string, options, guard) {
+               // Based on John Resig's `tmpl` implementation
+               // (http://ejohn.org/blog/javascript-micro-templating/)
+               // and Laura Doktorova's doT.js (https://github.com/olado/doT).
+               var settings = lodash.templateSettings;
 
-                     var loc = preventCoincident([point.lon, point.lat], true); // Elements are presented in a strange way
+               if (guard && isIterateeCall(string, options, guard)) {
+                 options = undefined$1;
+               }
 
-                     var ids = id.split(',');
-                     var from_way = ids[0];
-                     var via_node = ids[3];
-                     var to_way = ids[2].split(':')[1];
-                     var d = new QAItem(loc, _this, k, itemId, {
-                       issueKey: k,
-                       identifier: id,
-                       objectId: via_node,
-                       objectType: 'node'
-                     }); // Travel direction along from_way clarifies the turn restriction
+               string = toString(string);
+               options = assignInWith({}, options, settings, customDefaultsAssignIn);
+               var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
+                   importsKeys = keys(imports),
+                   importsValues = baseValues(imports, importsKeys);
+               var isEscaping,
+                   isEvaluating,
+                   index = 0,
+                   interpolate = options.interpolate || reNoMatch,
+                   source = "__p += '"; // Compile the regexp to match each delimiter.
 
-                     var _segments$0$points = _slicedToArray(segments[0].points, 2),
-                         p1 = _segments$0$points[0],
-                         p2 = _segments$0$points[1];
+               var reDelimiters = RegExp((options.escape || reNoMatch).source + '|' + interpolate.source + '|' + (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' + (options.evaluate || reNoMatch).source + '|$', 'g'); // Use a sourceURL for easier debugging.
+               // The sourceURL gets injected into the source that's eval-ed, so be careful
+               // to normalize all kinds of whitespace, so e.g. newlines (and unicode versions of it) can't sneak in
+               // and escape the comment, thus injecting code that gets evaled.
 
-                     var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
+               var sourceURL = '//# sourceURL=' + (hasOwnProperty.call(options, 'sourceURL') ? (options.sourceURL + '').replace(/\s/g, ' ') : 'lodash.templateSources[' + ++templateCounter + ']') + '\n';
+               string.replace(reDelimiters, function (match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
+                 interpolateValue || (interpolateValue = esTemplateValue); // Escape characters that can't be included in string literals.
 
-                     d.replacements = {
-                       num_passed: numberOfPasses,
-                       num_trips: segments[0].numberOfTrips,
-                       turn_restriction: turnType.toLowerCase(),
-                       from_way: linkEntity('w' + from_way),
-                       to_way: linkEntity('w' + to_way),
-                       travel_direction: dir_of_travel,
-                       junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
-                     };
-                     _cache$1.data[d.id] = d;
+                 source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar); // Replace delimiters with snippets.
 
-                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+                 if (escapeValue) {
+                   isEscaping = true;
+                   source += "' +\n__e(" + escapeValue + ") +\n'";
+                 }
 
-                     dispatch$2.call('loaded');
-                   });
+                 if (evaluateValue) {
+                   isEvaluating = true;
+                   source += "';\n" + evaluateValue + ";\n__p += '";
                  }
-               })["catch"](function () {
-                 delete _cache$1.inflightTile[tile.id][k];
 
-                 if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
-                   delete _cache$1.inflightTile[tile.id];
-                   _cache$1.loadedTile[tile.id] = true;
+                 if (interpolateValue) {
+                   source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
                  }
+
+                 index = offset + match.length; // The JS engine embedded in Adobe products needs `match` returned in
+                 // order to produce the correct `offset` value.
+
+                 return match;
                });
-             });
-             _cache$1.inflightTile[tile.id] = requests;
-           });
-         },
-         getComments: function getComments(item) {
-           var _this2 = this;
+               source += "';\n"; // If `variable` is not specified wrap a with-statement around the generated
+               // code to add the data object to the top of the scope chain.
 
-           // If comments already retrieved no need to do so again
-           if (item.comments) {
-             return Promise.resolve(item);
-           }
+               var variable = hasOwnProperty.call(options, 'variable') && options.variable;
 
-           var key = item.issueKey;
-           var qParams = {};
+               if (!variable) {
+                 source = 'with (obj) {\n' + source + '\n}\n';
+               } // Throw an error if a forbidden character was found in `variable`, to prevent
+               // potential command injection attacks.
+               else if (reForbiddenIdentifierChars.test(variable)) {
+                 throw new Error(INVALID_TEMPL_VAR_ERROR_TEXT);
+               } // Cleanup code by stripping empty strings.
 
-           if (key === 'ow') {
-             qParams = item.identifier;
-           } else if (key === 'mr') {
-             qParams.tileX = item.identifier.x;
-             qParams.tileY = item.identifier.y;
-           } else if (key === 'tr') {
-             qParams.targetId = item.identifier;
-           }
 
-           var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
+               source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source).replace(reEmptyStringMiddle, '$1').replace(reEmptyStringTrailing, '$1;'); // Frame code as the function body.
 
-           var cacheComments = function cacheComments(data) {
-             // Assign directly for immediate use afterwards
-             // comments are served newest to oldest
-             item.comments = data.comments ? data.comments.reverse() : [];
+               source = 'function(' + (variable || 'obj') + ') {\n' + (variable ? '' : 'obj || (obj = {});\n') + "var __t, __p = ''" + (isEscaping ? ', __e = _.escape' : '') + (isEvaluating ? ', __j = Array.prototype.join;\n' + "function print() { __p += __j.call(arguments, '') }\n" : ';\n') + source + 'return __p\n}';
+               var result = attempt(function () {
+                 return Function(importsKeys, sourceURL + 'return ' + source).apply(undefined$1, importsValues);
+               }); // Provide the compiled function's source by its `toString` method or
+               // the `source` property as a convenience for inlining compiled templates.
 
-             _this2.replaceItem(item);
-           };
+               result.source = source;
 
-           return d3_json(url).then(cacheComments).then(function () {
-             return item;
-           });
-         },
-         postUpdate: function postUpdate(d, callback) {
-           if (!serviceOsm.authenticated()) {
-             // Username required in payload
-             return callback({
-               message: 'Not Authenticated',
-               status: -3
-             }, d);
-           }
+               if (isError(result)) {
+                 throw result;
+               }
 
-           if (_cache$1.inflightPost[d.id]) {
-             return callback({
-               message: 'Error update already inflight',
-               status: -2
-             }, d);
-           } // Payload can only be sent once username is established
+               return result;
+             }
+             /**
+              * Converts `string`, as a whole, to lower case just like
+              * [String#toLowerCase](https://mdn.io/toLowerCase).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the lower cased string.
+              * @example
+              *
+              * _.toLower('--Foo-Bar--');
+              * // => '--foo-bar--'
+              *
+              * _.toLower('fooBar');
+              * // => 'foobar'
+              *
+              * _.toLower('__FOO_BAR__');
+              * // => '__foo_bar__'
+              */
 
 
-           serviceOsm.userDetails(sendPayload.bind(this));
+             function toLower(value) {
+               return toString(value).toLowerCase();
+             }
+             /**
+              * Converts `string`, as a whole, to upper case just like
+              * [String#toUpperCase](https://mdn.io/toUpperCase).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the upper cased string.
+              * @example
+              *
+              * _.toUpper('--foo-bar--');
+              * // => '--FOO-BAR--'
+              *
+              * _.toUpper('fooBar');
+              * // => 'FOOBAR'
+              *
+              * _.toUpper('__foo_bar__');
+              * // => '__FOO_BAR__'
+              */
 
-           function sendPayload(err, user) {
-             var _this3 = this;
 
-             if (err) {
-               return callback(err, d);
+             function toUpper(value) {
+               return toString(value).toUpperCase();
              }
+             /**
+              * Removes leading and trailing whitespace or specified characters from `string`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to trim.
+              * @param {string} [chars=whitespace] The characters to trim.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {string} Returns the trimmed string.
+              * @example
+              *
+              * _.trim('  abc  ');
+              * // => 'abc'
+              *
+              * _.trim('-_-abc-_-', '_-');
+              * // => 'abc'
+              *
+              * _.map(['  foo  ', '  bar  '], _.trim);
+              * // => ['foo', 'bar']
+              */
 
-             var key = d.issueKey;
-             var url = "".concat(_impOsmUrls[key], "/comment");
-             var payload = {
-               username: user.display_name,
-               targetIds: [d.identifier]
-             };
 
-             if (d.newStatus) {
-               payload.status = d.newStatus;
-               payload.text = 'status changed';
-             } // Comment take place of default text
+             function trim(string, chars, guard) {
+               string = toString(string);
+
+               if (string && (guard || chars === undefined$1)) {
+                 return baseTrim(string);
+               }
 
+               if (!string || !(chars = baseToString(chars))) {
+                 return string;
+               }
 
-             if (d.newComment) {
-               payload.text = d.newComment;
+               var strSymbols = stringToArray(string),
+                   chrSymbols = stringToArray(chars),
+                   start = charsStartIndex(strSymbols, chrSymbols),
+                   end = charsEndIndex(strSymbols, chrSymbols) + 1;
+               return castSlice(strSymbols, start, end).join('');
              }
+             /**
+              * Removes trailing whitespace or specified characters from `string`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to trim.
+              * @param {string} [chars=whitespace] The characters to trim.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {string} Returns the trimmed string.
+              * @example
+              *
+              * _.trimEnd('  abc  ');
+              * // => '  abc'
+              *
+              * _.trimEnd('-_-abc-_-', '_-');
+              * // => '-_-abc'
+              */
 
-             var controller = new AbortController();
-             _cache$1.inflightPost[d.id] = controller;
-             var options = {
-               method: 'POST',
-               signal: controller.signal,
-               body: JSON.stringify(payload)
-             };
-             d3_json(url, options).then(function () {
-               delete _cache$1.inflightPost[d.id]; // Just a comment, update error in cache
 
-               if (!d.newStatus) {
-                 var now = new Date();
-                 var comments = d.comments ? d.comments : [];
-                 comments.push({
-                   username: payload.username,
-                   text: payload.text,
-                   timestamp: now.getTime() / 1000
-                 });
+             function trimEnd(string, chars, guard) {
+               string = toString(string);
 
-                 _this3.replaceItem(d.update({
-                   comments: comments,
-                   newComment: undefined
-                 }));
-               } else {
-                 _this3.removeItem(d);
+               if (string && (guard || chars === undefined$1)) {
+                 return string.slice(0, trimmedEndIndex(string) + 1);
+               }
 
-                 if (d.newStatus === 'SOLVED') {
-                   // Keep track of the number of issues closed per type to tag the changeset
-                   if (!(d.issueKey in _cache$1.closed)) {
-                     _cache$1.closed[d.issueKey] = 0;
-                   }
+               if (!string || !(chars = baseToString(chars))) {
+                 return string;
+               }
 
-                   _cache$1.closed[d.issueKey] += 1;
-                 }
+               var strSymbols = stringToArray(string),
+                   end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
+               return castSlice(strSymbols, 0, end).join('');
+             }
+             /**
+              * Removes leading whitespace or specified characters from `string`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to trim.
+              * @param {string} [chars=whitespace] The characters to trim.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {string} Returns the trimmed string.
+              * @example
+              *
+              * _.trimStart('  abc  ');
+              * // => 'abc  '
+              *
+              * _.trimStart('-_-abc-_-', '_-');
+              * // => 'abc-_-'
+              */
+
+
+             function trimStart(string, chars, guard) {
+               string = toString(string);
+
+               if (string && (guard || chars === undefined$1)) {
+                 return string.replace(reTrimStart, '');
                }
 
-               if (callback) callback(null, d);
-             })["catch"](function (err) {
-               delete _cache$1.inflightPost[d.id];
-               if (callback) callback(err.message);
-             });
-           }
-         },
-         // Get all cached QAItems covering the viewport
-         getItems: function getItems(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-           return _cache$1.rtree.search(bbox).map(function (d) {
-             return d.data;
-           });
-         },
-         // Get a QAItem from cache
-         // NOTE: Don't change method name until UI v3 is merged
-         getError: function getError(id) {
-           return _cache$1.data[id];
-         },
-         // get the name of the icon to display for this item
-         getIcon: function getIcon(itemType) {
-           return _impOsmData.icons[itemType];
-         },
-         // Replace a single QAItem in the cache
-         replaceItem: function replaceItem(issue) {
-           if (!(issue instanceof QAItem) || !issue.id) return;
-           _cache$1.data[issue.id] = issue;
-           updateRtree$1(encodeIssueRtree$1(issue), true); // true = replace
+               if (!string || !(chars = baseToString(chars))) {
+                 return string;
+               }
 
-           return issue;
-         },
-         // Remove a single QAItem from the cache
-         removeItem: function removeItem(issue) {
-           if (!(issue instanceof QAItem) || !issue.id) return;
-           delete _cache$1.data[issue.id];
-           updateRtree$1(encodeIssueRtree$1(issue), false); // false = remove
-         },
-         // Used to populate `closed:improveosm:*` changeset tags
-         getClosedCounts: function getClosedCounts() {
-           return _cache$1.closed;
-         }
-       };
+               var strSymbols = stringToArray(string),
+                   start = charsStartIndex(strSymbols, stringToArray(chars));
+               return castSlice(strSymbols, start).join('');
+             }
+             /**
+              * Truncates `string` if it's longer than the given maximum string length.
+              * The last characters of the truncated string are replaced with the omission
+              * string which defaults to "...".
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to truncate.
+              * @param {Object} [options={}] The options object.
+              * @param {number} [options.length=30] The maximum string length.
+              * @param {string} [options.omission='...'] The string to indicate text is omitted.
+              * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
+              * @returns {string} Returns the truncated string.
+              * @example
+              *
+              * _.truncate('hi-diddly-ho there, neighborino');
+              * // => 'hi-diddly-ho there, neighbo...'
+              *
+              * _.truncate('hi-diddly-ho there, neighborino', {
+              *   'length': 24,
+              *   'separator': ' '
+              * });
+              * // => 'hi-diddly-ho there,...'
+              *
+              * _.truncate('hi-diddly-ho there, neighborino', {
+              *   'length': 24,
+              *   'separator': /,? +/
+              * });
+              * // => 'hi-diddly-ho there...'
+              *
+              * _.truncate('hi-diddly-ho there, neighborino', {
+              *   'omission': ' [...]'
+              * });
+              * // => 'hi-diddly-ho there, neig [...]'
+              */
 
-       var quot = /"/g;
 
-       // B.2.3.2.1 CreateHTML(string, tag, attribute, value)
-       // https://tc39.github.io/ecma262/#sec-createhtml
-       var createHtml = function (string, tag, attribute, value) {
-         var S = String(requireObjectCoercible(string));
-         var p1 = '<' + tag;
-         if (attribute !== '') p1 += ' ' + attribute + '="' + String(value).replace(quot, '&quot;') + '"';
-         return p1 + '>' + S + '</' + tag + '>';
-       };
+             function truncate(string, options) {
+               var length = DEFAULT_TRUNC_LENGTH,
+                   omission = DEFAULT_TRUNC_OMISSION;
 
-       // check the existence of a method, lowercase
-       // of a tag and escaping quotes in arguments
-       var stringHtmlForced = function (METHOD_NAME) {
-         return fails(function () {
-           var test = ''[METHOD_NAME]('"');
-           return test !== test.toLowerCase() || test.split('"').length > 3;
-         });
-       };
+               if (isObject(options)) {
+                 var separator = 'separator' in options ? options.separator : separator;
+                 length = 'length' in options ? toInteger(options.length) : length;
+                 omission = 'omission' in options ? baseToString(options.omission) : omission;
+               }
 
-       // `String.prototype.link` method
-       // https://tc39.github.io/ecma262/#sec-string.prototype.link
-       _export({ target: 'String', proto: true, forced: stringHtmlForced('link') }, {
-         link: function link(url) {
-           return createHtml(this, 'a', 'href', url);
-         }
-       });
+               string = toString(string);
+               var strLength = string.length;
 
-       var getOwnPropertyDescriptor$4 = objectGetOwnPropertyDescriptor.f;
+               if (hasUnicode(string)) {
+                 var strSymbols = stringToArray(string);
+                 strLength = strSymbols.length;
+               }
 
+               if (length >= strLength) {
+                 return string;
+               }
 
+               var end = length - stringSize(omission);
 
+               if (end < 1) {
+                 return omission;
+               }
 
+               var result = strSymbols ? castSlice(strSymbols, 0, end).join('') : string.slice(0, end);
 
+               if (separator === undefined$1) {
+                 return result + omission;
+               }
 
-       var nativeEndsWith = ''.endsWith;
-       var min$8 = Math.min;
+               if (strSymbols) {
+                 end += result.length - end;
+               }
 
-       var CORRECT_IS_REGEXP_LOGIC = correctIsRegexpLogic('endsWith');
-       // https://github.com/zloirock/core-js/pull/702
-       var MDN_POLYFILL_BUG =  !CORRECT_IS_REGEXP_LOGIC && !!function () {
-         var descriptor = getOwnPropertyDescriptor$4(String.prototype, 'endsWith');
-         return descriptor && !descriptor.writable;
-       }();
+               if (isRegExp(separator)) {
+                 if (string.slice(end).search(separator)) {
+                   var match,
+                       substring = result;
 
-       // `String.prototype.endsWith` method
-       // https://tc39.github.io/ecma262/#sec-string.prototype.endswith
-       _export({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG && !CORRECT_IS_REGEXP_LOGIC }, {
-         endsWith: function endsWith(searchString /* , endPosition = @length */) {
-           var that = String(requireObjectCoercible(this));
-           notARegexp(searchString);
-           var endPosition = arguments.length > 1 ? arguments[1] : undefined;
-           var len = toLength(that.length);
-           var end = endPosition === undefined ? len : min$8(toLength(endPosition), len);
-           var search = String(searchString);
-           return nativeEndsWith
-             ? nativeEndsWith.call(that, search, end)
-             : that.slice(end - search.length, end) === search;
-         }
-       });
+                   if (!separator.global) {
+                     separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
+                   }
 
-       var getOwnPropertyDescriptor$5 = objectGetOwnPropertyDescriptor.f;
+                   separator.lastIndex = 0;
 
+                   while (match = separator.exec(substring)) {
+                     var newEnd = match.index;
+                   }
 
+                   result = result.slice(0, newEnd === undefined$1 ? end : newEnd);
+                 }
+               } else if (string.indexOf(baseToString(separator), end) != end) {
+                 var index = result.lastIndexOf(separator);
 
+                 if (index > -1) {
+                   result = result.slice(0, index);
+                 }
+               }
 
+               return result + omission;
+             }
+             /**
+              * The inverse of `_.escape`; this method converts the HTML entities
+              * `&amp;`, `&lt;`, `&gt;`, `&quot;`, and `&#39;` in `string` to
+              * their corresponding characters.
+              *
+              * **Note:** No other HTML entities are unescaped. To unescape additional
+              * HTML entities use a third-party library like [_he_](https://mths.be/he).
+              *
+              * @static
+              * @memberOf _
+              * @since 0.6.0
+              * @category String
+              * @param {string} [string=''] The string to unescape.
+              * @returns {string} Returns the unescaped string.
+              * @example
+              *
+              * _.unescape('fred, barney, &amp; pebbles');
+              * // => 'fred, barney, & pebbles'
+              */
 
 
-       var nativeStartsWith = ''.startsWith;
-       var min$9 = Math.min;
+             function unescape(string) {
+               string = toString(string);
+               return string && reHasEscapedHtml.test(string) ? string.replace(reEscapedHtml, unescapeHtmlChar) : string;
+             }
+             /**
+              * Converts `string`, as space separated words, to upper case.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the upper cased string.
+              * @example
+              *
+              * _.upperCase('--foo-bar');
+              * // => 'FOO BAR'
+              *
+              * _.upperCase('fooBar');
+              * // => 'FOO BAR'
+              *
+              * _.upperCase('__foo_bar__');
+              * // => 'FOO BAR'
+              */
 
-       var CORRECT_IS_REGEXP_LOGIC$1 = correctIsRegexpLogic('startsWith');
-       // https://github.com/zloirock/core-js/pull/702
-       var MDN_POLYFILL_BUG$1 =  !CORRECT_IS_REGEXP_LOGIC$1 && !!function () {
-         var descriptor = getOwnPropertyDescriptor$5(String.prototype, 'startsWith');
-         return descriptor && !descriptor.writable;
-       }();
 
-       // `String.prototype.startsWith` method
-       // https://tc39.github.io/ecma262/#sec-string.prototype.startswith
-       _export({ target: 'String', proto: true, forced: !MDN_POLYFILL_BUG$1 && !CORRECT_IS_REGEXP_LOGIC$1 }, {
-         startsWith: function startsWith(searchString /* , position = 0 */) {
-           var that = String(requireObjectCoercible(this));
-           notARegexp(searchString);
-           var index = toLength(min$9(arguments.length > 1 ? arguments[1] : undefined, that.length));
-           var search = String(searchString);
-           return nativeStartsWith
-             ? nativeStartsWith.call(that, search, index)
-             : that.slice(index, index + search.length) === search;
-         }
-       });
+             var upperCase = createCompounder(function (result, word, index) {
+               return result + (index ? ' ' : '') + word.toUpperCase();
+             });
+             /**
+              * Converts the first character of `string` to upper case.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category String
+              * @param {string} [string=''] The string to convert.
+              * @returns {string} Returns the converted string.
+              * @example
+              *
+              * _.upperFirst('fred');
+              * // => 'Fred'
+              *
+              * _.upperFirst('FRED');
+              * // => 'FRED'
+              */
 
-       var $trimEnd = stringTrim.end;
+             var upperFirst = createCaseFirst('toUpperCase');
+             /**
+              * Splits `string` into an array of its words.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category String
+              * @param {string} [string=''] The string to inspect.
+              * @param {RegExp|string} [pattern] The pattern to match words.
+              * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
+              * @returns {Array} Returns the words of `string`.
+              * @example
+              *
+              * _.words('fred, barney, & pebbles');
+              * // => ['fred', 'barney', 'pebbles']
+              *
+              * _.words('fred, barney, & pebbles', /[^, ]+/g);
+              * // => ['fred', 'barney', '&', 'pebbles']
+              */
 
+             function words(string, pattern, guard) {
+               string = toString(string);
+               pattern = guard ? undefined$1 : pattern;
 
-       var FORCED$e = stringTrimForced('trimEnd');
+               if (pattern === undefined$1) {
+                 return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
+               }
 
-       var trimEnd = FORCED$e ? function trimEnd() {
-         return $trimEnd(this);
-       } : ''.trimEnd;
+               return string.match(pattern) || [];
+             }
+             /*------------------------------------------------------------------------*/
 
-       // `String.prototype.{ trimEnd, trimRight }` methods
-       // https://github.com/tc39/ecmascript-string-left-right-trim
-       _export({ target: 'String', proto: true, forced: FORCED$e }, {
-         trimEnd: trimEnd,
-         trimRight: trimEnd
-       });
+             /**
+              * Attempts to invoke `func`, returning either the result or the caught error
+              * object. Any additional arguments are provided to `func` when it's invoked.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Util
+              * @param {Function} func The function to attempt.
+              * @param {...*} [args] The arguments to invoke `func` with.
+              * @returns {*} Returns the `func` result or error object.
+              * @example
+              *
+              * // Avoid throwing errors for invalid selectors.
+              * var elements = _.attempt(function(selector) {
+              *   return document.querySelectorAll(selector);
+              * }, '>_>');
+              *
+              * if (_.isError(elements)) {
+              *   elements = [];
+              * }
+              */
 
-       var defaults = createCommonjsModule(function (module) {
-         function getDefaults() {
-           return {
-             baseUrl: null,
-             breaks: false,
-             gfm: true,
-             headerIds: true,
-             headerPrefix: '',
-             highlight: null,
-             langPrefix: 'language-',
-             mangle: true,
-             pedantic: false,
-             renderer: null,
-             sanitize: false,
-             sanitizer: null,
-             silent: false,
-             smartLists: false,
-             smartypants: false,
-             tokenizer: null,
-             walkTokens: null,
-             xhtml: false
-           };
-         }
 
-         function changeDefaults(newDefaults) {
-           module.exports.defaults = newDefaults;
-         }
+             var attempt = baseRest(function (func, args) {
+               try {
+                 return apply(func, undefined$1, args);
+               } catch (e) {
+                 return isError(e) ? e : new Error(e);
+               }
+             });
+             /**
+              * Binds methods of an object to the object itself, overwriting the existing
+              * method.
+              *
+              * **Note:** This method doesn't set the "length" property of bound functions.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Util
+              * @param {Object} object The object to bind and assign the bound methods to.
+              * @param {...(string|string[])} methodNames The object method names to bind.
+              * @returns {Object} Returns `object`.
+              * @example
+              *
+              * var view = {
+              *   'label': 'docs',
+              *   'click': function() {
+              *     console.log('clicked ' + this.label);
+              *   }
+              * };
+              *
+              * _.bindAll(view, ['click']);
+              * jQuery(element).on('click', view.click);
+              * // => Logs 'clicked docs' when clicked.
+              */
 
-         module.exports = {
-           defaults: getDefaults(),
-           getDefaults: getDefaults,
-           changeDefaults: changeDefaults
-         };
-       });
+             var bindAll = flatRest(function (object, methodNames) {
+               arrayEach(methodNames, function (key) {
+                 key = toKey(key);
+                 baseAssignValue(object, key, bind(object[key], object));
+               });
+               return object;
+             });
+             /**
+              * Creates a function that iterates over `pairs` and invokes the corresponding
+              * function of the first predicate to return truthy. The predicate-function
+              * pairs are invoked with the `this` binding and arguments of the created
+              * function.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Util
+              * @param {Array} pairs The predicate-function pairs.
+              * @returns {Function} Returns the new composite function.
+              * @example
+              *
+              * var func = _.cond([
+              *   [_.matches({ 'a': 1 }),           _.constant('matches A')],
+              *   [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
+              *   [_.stubTrue,                      _.constant('no match')]
+              * ]);
+              *
+              * func({ 'a': 1, 'b': 2 });
+              * // => 'matches A'
+              *
+              * func({ 'a': 0, 'b': 1 });
+              * // => 'matches B'
+              *
+              * func({ 'a': '1', 'b': '2' });
+              * // => 'no match'
+              */
 
-       /**
-        * Helpers
-        */
-       var escapeTest = /[&<>"']/;
-       var escapeReplace = /[&<>"']/g;
-       var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
-       var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
-       var escapeReplacements = {
-         '&': '&amp;',
-         '<': '&lt;',
-         '>': '&gt;',
-         '"': '&quot;',
-         "'": '&#39;'
-       };
+             function cond(pairs) {
+               var length = pairs == null ? 0 : pairs.length,
+                   toIteratee = getIteratee();
+               pairs = !length ? [] : arrayMap(pairs, function (pair) {
+                 if (typeof pair[1] != 'function') {
+                   throw new TypeError(FUNC_ERROR_TEXT);
+                 }
 
-       var getEscapeReplacement = function getEscapeReplacement(ch) {
-         return escapeReplacements[ch];
-       };
+                 return [toIteratee(pair[0]), pair[1]];
+               });
+               return baseRest(function (args) {
+                 var index = -1;
 
-       function escape$1(html, encode) {
-         if (encode) {
-           if (escapeTest.test(html)) {
-             return html.replace(escapeReplace, getEscapeReplacement);
-           }
-         } else {
-           if (escapeTestNoEncode.test(html)) {
-             return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
-           }
-         }
+                 while (++index < length) {
+                   var pair = pairs[index];
 
-         return html;
-       }
+                   if (apply(pair[0], this, args)) {
+                     return apply(pair[1], this, args);
+                   }
+                 }
+               });
+             }
+             /**
+              * Creates a function that invokes the predicate properties of `source` with
+              * the corresponding property values of a given object, returning `true` if
+              * all predicates return truthy, else `false`.
+              *
+              * **Note:** The created function is equivalent to `_.conformsTo` with
+              * `source` partially applied.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Util
+              * @param {Object} source The object of property predicates to conform to.
+              * @returns {Function} Returns the new spec function.
+              * @example
+              *
+              * var objects = [
+              *   { 'a': 2, 'b': 1 },
+              *   { 'a': 1, 'b': 2 }
+              * ];
+              *
+              * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
+              * // => [{ 'a': 1, 'b': 2 }]
+              */
 
-       var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
-       function unescape$1(html) {
-         // explicitly match decimal, hex, and named HTML entities
-         return html.replace(unescapeTest, function (_, n) {
-           n = n.toLowerCase();
-           if (n === 'colon') return ':';
+             function conforms(source) {
+               return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
+             }
+             /**
+              * Creates a function that returns `value`.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.4.0
+              * @category Util
+              * @param {*} value The value to return from the new function.
+              * @returns {Function} Returns the new constant function.
+              * @example
+              *
+              * var objects = _.times(2, _.constant({ 'a': 1 }));
+              *
+              * console.log(objects);
+              * // => [{ 'a': 1 }, { 'a': 1 }]
+              *
+              * console.log(objects[0] === objects[1]);
+              * // => true
+              */
 
-           if (n.charAt(0) === '#') {
-             return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
-           }
 
-           return '';
-         });
-       }
+             function constant(value) {
+               return function () {
+                 return value;
+               };
+             }
+             /**
+              * Checks `value` to determine whether a default value should be returned in
+              * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
+              * or `undefined`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.14.0
+              * @category Util
+              * @param {*} value The value to check.
+              * @param {*} defaultValue The default value.
+              * @returns {*} Returns the resolved value.
+              * @example
+              *
+              * _.defaultTo(1, 10);
+              * // => 1
+              *
+              * _.defaultTo(undefined, 10);
+              * // => 10
+              */
+
+
+             function defaultTo(value, defaultValue) {
+               return value == null || value !== value ? defaultValue : value;
+             }
+             /**
+              * Creates a function that returns the result of invoking the given functions
+              * with the `this` binding of the created function, where each successive
+              * invocation is supplied the return value of the previous.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Util
+              * @param {...(Function|Function[])} [funcs] The functions to invoke.
+              * @returns {Function} Returns the new composite function.
+              * @see _.flowRight
+              * @example
+              *
+              * function square(n) {
+              *   return n * n;
+              * }
+              *
+              * var addSquare = _.flow([_.add, square]);
+              * addSquare(1, 2);
+              * // => 9
+              */
+
+
+             var flow = createFlow();
+             /**
+              * This method is like `_.flow` except that it creates a function that
+              * invokes the given functions from right to left.
+              *
+              * @static
+              * @since 3.0.0
+              * @memberOf _
+              * @category Util
+              * @param {...(Function|Function[])} [funcs] The functions to invoke.
+              * @returns {Function} Returns the new composite function.
+              * @see _.flow
+              * @example
+              *
+              * function square(n) {
+              *   return n * n;
+              * }
+              *
+              * var addSquare = _.flowRight([square, _.add]);
+              * addSquare(1, 2);
+              * // => 9
+              */
+
+             var flowRight = createFlow(true);
+             /**
+              * This method returns the first argument it receives.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Util
+              * @param {*} value Any value.
+              * @returns {*} Returns `value`.
+              * @example
+              *
+              * var object = { 'a': 1 };
+              *
+              * console.log(_.identity(object) === object);
+              * // => true
+              */
+
+             function identity(value) {
+               return value;
+             }
+             /**
+              * Creates a function that invokes `func` with the arguments of the created
+              * function. If `func` is a property name, the created function returns the
+              * property value for a given element. If `func` is an array or object, the
+              * created function returns `true` for elements that contain the equivalent
+              * source properties, otherwise it returns `false`.
+              *
+              * @static
+              * @since 4.0.0
+              * @memberOf _
+              * @category Util
+              * @param {*} [func=_.identity] The value to convert to a callback.
+              * @returns {Function} Returns the callback.
+              * @example
+              *
+              * var users = [
+              *   { 'user': 'barney', 'age': 36, 'active': true },
+              *   { 'user': 'fred',   'age': 40, 'active': false }
+              * ];
+              *
+              * // The `_.matches` iteratee shorthand.
+              * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
+              * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
+              *
+              * // The `_.matchesProperty` iteratee shorthand.
+              * _.filter(users, _.iteratee(['user', 'fred']));
+              * // => [{ 'user': 'fred', 'age': 40 }]
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.map(users, _.iteratee('user'));
+              * // => ['barney', 'fred']
+              *
+              * // Create custom iteratee shorthands.
+              * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
+              *   return !_.isRegExp(func) ? iteratee(func) : function(string) {
+              *     return func.test(string);
+              *   };
+              * });
+              *
+              * _.filter(['abc', 'def'], /ef/);
+              * // => ['def']
+              */
+
+
+             function iteratee(func) {
+               return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
+             }
+             /**
+              * Creates a function that performs a partial deep comparison between a given
+              * object and `source`, returning `true` if the given object has equivalent
+              * property values, else `false`.
+              *
+              * **Note:** The created function is equivalent to `_.isMatch` with `source`
+              * partially applied.
+              *
+              * Partial comparisons will match empty array and empty object `source`
+              * values against any array or object value, respectively. See `_.isEqual`
+              * for a list of supported value comparisons.
+              *
+              * **Note:** Multiple values can be checked by combining several matchers
+              * using `_.overSome`
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Util
+              * @param {Object} source The object of property values to match.
+              * @returns {Function} Returns the new spec function.
+              * @example
+              *
+              * var objects = [
+              *   { 'a': 1, 'b': 2, 'c': 3 },
+              *   { 'a': 4, 'b': 5, 'c': 6 }
+              * ];
+              *
+              * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
+              * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
+              *
+              * // Checking for several possible values
+              * _.filter(objects, _.overSome([_.matches({ 'a': 1 }), _.matches({ 'a': 4 })]));
+              * // => [{ 'a': 1, 'b': 2, 'c': 3 }, { 'a': 4, 'b': 5, 'c': 6 }]
+              */
+
+
+             function matches(source) {
+               return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
+             }
+             /**
+              * Creates a function that performs a partial deep comparison between the
+              * value at `path` of a given object to `srcValue`, returning `true` if the
+              * object value is equivalent, else `false`.
+              *
+              * **Note:** Partial comparisons will match empty array and empty object
+              * `srcValue` values against any array or object value, respectively. See
+              * `_.isEqual` for a list of supported value comparisons.
+              *
+              * **Note:** Multiple values can be checked by combining several matchers
+              * using `_.overSome`
+              *
+              * @static
+              * @memberOf _
+              * @since 3.2.0
+              * @category Util
+              * @param {Array|string} path The path of the property to get.
+              * @param {*} srcValue The value to match.
+              * @returns {Function} Returns the new spec function.
+              * @example
+              *
+              * var objects = [
+              *   { 'a': 1, 'b': 2, 'c': 3 },
+              *   { 'a': 4, 'b': 5, 'c': 6 }
+              * ];
+              *
+              * _.find(objects, _.matchesProperty('a', 4));
+              * // => { 'a': 4, 'b': 5, 'c': 6 }
+              *
+              * // Checking for several possible values
+              * _.filter(objects, _.overSome([_.matchesProperty('a', 1), _.matchesProperty('a', 4)]));
+              * // => [{ 'a': 1, 'b': 2, 'c': 3 }, { 'a': 4, 'b': 5, 'c': 6 }]
+              */
+
+
+             function matchesProperty(path, srcValue) {
+               return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
+             }
+             /**
+              * Creates a function that invokes the method at `path` of a given object.
+              * Any additional arguments are provided to the invoked method.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.7.0
+              * @category Util
+              * @param {Array|string} path The path of the method to invoke.
+              * @param {...*} [args] The arguments to invoke the method with.
+              * @returns {Function} Returns the new invoker function.
+              * @example
+              *
+              * var objects = [
+              *   { 'a': { 'b': _.constant(2) } },
+              *   { 'a': { 'b': _.constant(1) } }
+              * ];
+              *
+              * _.map(objects, _.method('a.b'));
+              * // => [2, 1]
+              *
+              * _.map(objects, _.method(['a', 'b']));
+              * // => [2, 1]
+              */
+
+
+             var method = baseRest(function (path, args) {
+               return function (object) {
+                 return baseInvoke(object, path, args);
+               };
+             });
+             /**
+              * The opposite of `_.method`; this method creates a function that invokes
+              * the method at a given path of `object`. Any additional arguments are
+              * provided to the invoked method.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.7.0
+              * @category Util
+              * @param {Object} object The object to query.
+              * @param {...*} [args] The arguments to invoke the method with.
+              * @returns {Function} Returns the new invoker function.
+              * @example
+              *
+              * var array = _.times(3, _.constant),
+              *     object = { 'a': array, 'b': array, 'c': array };
+              *
+              * _.map(['a[2]', 'c[0]'], _.methodOf(object));
+              * // => [2, 0]
+              *
+              * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
+              * // => [2, 0]
+              */
+
+             var methodOf = baseRest(function (object, args) {
+               return function (path) {
+                 return baseInvoke(object, path, args);
+               };
+             });
+             /**
+              * Adds all own enumerable string keyed function properties of a source
+              * object to the destination object. If `object` is a function, then methods
+              * are added to its prototype as well.
+              *
+              * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
+              * avoid conflicts caused by modifying the original.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Util
+              * @param {Function|Object} [object=lodash] The destination object.
+              * @param {Object} source The object of functions to add.
+              * @param {Object} [options={}] The options object.
+              * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
+              * @returns {Function|Object} Returns `object`.
+              * @example
+              *
+              * function vowels(string) {
+              *   return _.filter(string, function(v) {
+              *     return /[aeiou]/i.test(v);
+              *   });
+              * }
+              *
+              * _.mixin({ 'vowels': vowels });
+              * _.vowels('fred');
+              * // => ['e']
+              *
+              * _('fred').vowels().value();
+              * // => ['e']
+              *
+              * _.mixin({ 'vowels': vowels }, { 'chain': false });
+              * _('fred').vowels();
+              * // => ['e']
+              */
+
+             function mixin(object, source, options) {
+               var props = keys(source),
+                   methodNames = baseFunctions(source, props);
+
+               if (options == null && !(isObject(source) && (methodNames.length || !props.length))) {
+                 options = source;
+                 source = object;
+                 object = this;
+                 methodNames = baseFunctions(source, keys(source));
+               }
+
+               var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
+                   isFunc = isFunction(object);
+               arrayEach(methodNames, function (methodName) {
+                 var func = source[methodName];
+                 object[methodName] = func;
+
+                 if (isFunc) {
+                   object.prototype[methodName] = function () {
+                     var chainAll = this.__chain__;
+
+                     if (chain || chainAll) {
+                       var result = object(this.__wrapped__),
+                           actions = result.__actions__ = copyArray(this.__actions__);
+                       actions.push({
+                         'func': func,
+                         'args': arguments,
+                         'thisArg': object
+                       });
+                       result.__chain__ = chainAll;
+                       return result;
+                     }
 
-       var caret = /(^|[^\[])\^/g;
+                     return func.apply(object, arrayPush([this.value()], arguments));
+                   };
+                 }
+               });
+               return object;
+             }
+             /**
+              * Reverts the `_` variable to its previous value and returns a reference to
+              * the `lodash` function.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Util
+              * @returns {Function} Returns the `lodash` function.
+              * @example
+              *
+              * var lodash = _.noConflict();
+              */
 
-       function edit(regex, opt) {
-         regex = regex.source || regex;
-         opt = opt || '';
-         var obj = {
-           replace: function replace(name, val) {
-             val = val.source || val;
-             val = val.replace(caret, '$1');
-             regex = regex.replace(name, val);
-             return obj;
-           },
-           getRegex: function getRegex() {
-             return new RegExp(regex, opt);
-           }
-         };
-         return obj;
-       }
 
-       var nonWordAndColonTest = /[^\w:]/g;
-       var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
+             function noConflict() {
+               if (root._ === this) {
+                 root._ = oldDash;
+               }
 
-       function cleanUrl(sanitize, base, href) {
-         if (sanitize) {
-           var prot;
+               return this;
+             }
+             /**
+              * This method returns `undefined`.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.3.0
+              * @category Util
+              * @example
+              *
+              * _.times(2, _.noop);
+              * // => [undefined, undefined]
+              */
 
-           try {
-             prot = decodeURIComponent(unescape$1(href)).replace(nonWordAndColonTest, '').toLowerCase();
-           } catch (e) {
-             return null;
-           }
 
-           if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
-             return null;
-           }
-         }
+             function noop() {// No operation performed.
+             }
+             /**
+              * Creates a function that gets the argument at index `n`. If `n` is negative,
+              * the nth argument from the end is returned.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Util
+              * @param {number} [n=0] The index of the argument to return.
+              * @returns {Function} Returns the new pass-thru function.
+              * @example
+              *
+              * var func = _.nthArg(1);
+              * func('a', 'b', 'c', 'd');
+              * // => 'b'
+              *
+              * var func = _.nthArg(-2);
+              * func('a', 'b', 'c', 'd');
+              * // => 'c'
+              */
 
-         if (base && !originIndependentUrl.test(href)) {
-           href = resolveUrl(base, href);
-         }
 
-         try {
-           href = encodeURI(href).replace(/%25/g, '%');
-         } catch (e) {
-           return null;
-         }
+             function nthArg(n) {
+               n = toInteger(n);
+               return baseRest(function (args) {
+                 return baseNth(args, n);
+               });
+             }
+             /**
+              * Creates a function that invokes `iteratees` with the arguments it receives
+              * and returns their results.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Util
+              * @param {...(Function|Function[])} [iteratees=[_.identity]]
+              *  The iteratees to invoke.
+              * @returns {Function} Returns the new function.
+              * @example
+              *
+              * var func = _.over([Math.max, Math.min]);
+              *
+              * func(1, 2, 3, 4);
+              * // => [4, 1]
+              */
 
-         return href;
-       }
 
-       var baseUrls = {};
-       var justDomain = /^[^:]+:\/*[^/]*$/;
-       var protocol = /^([^:]+:)[\s\S]*$/;
-       var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
+             var over = createOver(arrayMap);
+             /**
+              * Creates a function that checks if **all** of the `predicates` return
+              * truthy when invoked with the arguments it receives.
+              *
+              * Following shorthands are possible for providing predicates.
+              * Pass an `Object` and it will be used as an parameter for `_.matches` to create the predicate.
+              * Pass an `Array` of parameters for `_.matchesProperty` and the predicate will be created using them.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Util
+              * @param {...(Function|Function[])} [predicates=[_.identity]]
+              *  The predicates to check.
+              * @returns {Function} Returns the new function.
+              * @example
+              *
+              * var func = _.overEvery([Boolean, isFinite]);
+              *
+              * func('1');
+              * // => true
+              *
+              * func(null);
+              * // => false
+              *
+              * func(NaN);
+              * // => false
+              */
 
-       function resolveUrl(base, href) {
-         if (!baseUrls[' ' + base]) {
-           // we can ignore everything in base after the last slash of its path component,
-           // but we might need to add _that_
-           // https://tools.ietf.org/html/rfc3986#section-3
-           if (justDomain.test(base)) {
-             baseUrls[' ' + base] = base + '/';
-           } else {
-             baseUrls[' ' + base] = rtrim$1(base, '/', true);
-           }
-         }
+             var overEvery = createOver(arrayEvery);
+             /**
+              * Creates a function that checks if **any** of the `predicates` return
+              * truthy when invoked with the arguments it receives.
+              *
+              * Following shorthands are possible for providing predicates.
+              * Pass an `Object` and it will be used as an parameter for `_.matches` to create the predicate.
+              * Pass an `Array` of parameters for `_.matchesProperty` and the predicate will be created using them.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Util
+              * @param {...(Function|Function[])} [predicates=[_.identity]]
+              *  The predicates to check.
+              * @returns {Function} Returns the new function.
+              * @example
+              *
+              * var func = _.overSome([Boolean, isFinite]);
+              *
+              * func('1');
+              * // => true
+              *
+              * func(null);
+              * // => true
+              *
+              * func(NaN);
+              * // => false
+              *
+              * var matchesFunc = _.overSome([{ 'a': 1 }, { 'a': 2 }])
+              * var matchesPropertyFunc = _.overSome([['a', 1], ['a', 2]])
+              */
 
-         base = baseUrls[' ' + base];
-         var relativeBase = base.indexOf(':') === -1;
+             var overSome = createOver(arraySome);
+             /**
+              * Creates a function that returns the value at `path` of a given object.
+              *
+              * @static
+              * @memberOf _
+              * @since 2.4.0
+              * @category Util
+              * @param {Array|string} path The path of the property to get.
+              * @returns {Function} Returns the new accessor function.
+              * @example
+              *
+              * var objects = [
+              *   { 'a': { 'b': 2 } },
+              *   { 'a': { 'b': 1 } }
+              * ];
+              *
+              * _.map(objects, _.property('a.b'));
+              * // => [2, 1]
+              *
+              * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
+              * // => [1, 2]
+              */
 
-         if (href.substring(0, 2) === '//') {
-           if (relativeBase) {
-             return href;
-           }
+             function property(path) {
+               return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
+             }
+             /**
+              * The opposite of `_.property`; this method creates a function that returns
+              * the value at a given path of `object`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.0.0
+              * @category Util
+              * @param {Object} object The object to query.
+              * @returns {Function} Returns the new accessor function.
+              * @example
+              *
+              * var array = [0, 1, 2],
+              *     object = { 'a': array, 'b': array, 'c': array };
+              *
+              * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
+              * // => [2, 0]
+              *
+              * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
+              * // => [2, 0]
+              */
 
-           return base.replace(protocol, '$1') + href;
-         } else if (href.charAt(0) === '/') {
-           if (relativeBase) {
-             return href;
-           }
 
-           return base.replace(domain, '$1') + href;
-         } else {
-           return base + href;
-         }
-       }
+             function propertyOf(object) {
+               return function (path) {
+                 return object == null ? undefined$1 : baseGet(object, path);
+               };
+             }
+             /**
+              * Creates an array of numbers (positive and/or negative) progressing from
+              * `start` up to, but not including, `end`. A step of `-1` is used if a negative
+              * `start` is specified without an `end` or `step`. If `end` is not specified,
+              * it's set to `start` with `start` then set to `0`.
+              *
+              * **Note:** JavaScript follows the IEEE-754 standard for resolving
+              * floating-point values which can produce unexpected results.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Util
+              * @param {number} [start=0] The start of the range.
+              * @param {number} end The end of the range.
+              * @param {number} [step=1] The value to increment or decrement by.
+              * @returns {Array} Returns the range of numbers.
+              * @see _.inRange, _.rangeRight
+              * @example
+              *
+              * _.range(4);
+              * // => [0, 1, 2, 3]
+              *
+              * _.range(-4);
+              * // => [0, -1, -2, -3]
+              *
+              * _.range(1, 5);
+              * // => [1, 2, 3, 4]
+              *
+              * _.range(0, 20, 5);
+              * // => [0, 5, 10, 15]
+              *
+              * _.range(0, -4, -1);
+              * // => [0, -1, -2, -3]
+              *
+              * _.range(1, 4, 0);
+              * // => [1, 1, 1]
+              *
+              * _.range(0);
+              * // => []
+              */
 
-       var noopTest = {
-         exec: function noopTest() {}
-       };
 
-       function merge$1(obj) {
-         var i = 1,
-             target,
-             key;
+             var range = createRange();
+             /**
+              * This method is like `_.range` except that it populates values in
+              * descending order.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Util
+              * @param {number} [start=0] The start of the range.
+              * @param {number} end The end of the range.
+              * @param {number} [step=1] The value to increment or decrement by.
+              * @returns {Array} Returns the range of numbers.
+              * @see _.inRange, _.range
+              * @example
+              *
+              * _.rangeRight(4);
+              * // => [3, 2, 1, 0]
+              *
+              * _.rangeRight(-4);
+              * // => [-3, -2, -1, 0]
+              *
+              * _.rangeRight(1, 5);
+              * // => [4, 3, 2, 1]
+              *
+              * _.rangeRight(0, 20, 5);
+              * // => [15, 10, 5, 0]
+              *
+              * _.rangeRight(0, -4, -1);
+              * // => [-3, -2, -1, 0]
+              *
+              * _.rangeRight(1, 4, 0);
+              * // => [1, 1, 1]
+              *
+              * _.rangeRight(0);
+              * // => []
+              */
 
-         for (; i < arguments.length; i++) {
-           target = arguments[i];
+             var rangeRight = createRange(true);
+             /**
+              * This method returns a new empty array.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.13.0
+              * @category Util
+              * @returns {Array} Returns the new empty array.
+              * @example
+              *
+              * var arrays = _.times(2, _.stubArray);
+              *
+              * console.log(arrays);
+              * // => [[], []]
+              *
+              * console.log(arrays[0] === arrays[1]);
+              * // => false
+              */
 
-           for (key in target) {
-             if (Object.prototype.hasOwnProperty.call(target, key)) {
-               obj[key] = target[key];
+             function stubArray() {
+               return [];
              }
-           }
-         }
+             /**
+              * This method returns `false`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.13.0
+              * @category Util
+              * @returns {boolean} Returns `false`.
+              * @example
+              *
+              * _.times(2, _.stubFalse);
+              * // => [false, false]
+              */
 
-         return obj;
-       }
 
-       function splitCells(tableRow, count) {
-         // ensure that every cell-delimiting pipe has a space
-         // before it to distinguish it from an escaped pipe
-         var row = tableRow.replace(/\|/g, function (match, offset, str) {
-           var escaped = false,
-               curr = offset;
+             function stubFalse() {
+               return false;
+             }
+             /**
+              * This method returns a new empty object.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.13.0
+              * @category Util
+              * @returns {Object} Returns the new empty object.
+              * @example
+              *
+              * var objects = _.times(2, _.stubObject);
+              *
+              * console.log(objects);
+              * // => [{}, {}]
+              *
+              * console.log(objects[0] === objects[1]);
+              * // => false
+              */
 
-           while (--curr >= 0 && str[curr] === '\\') {
-             escaped = !escaped;
-           }
 
-           if (escaped) {
-             // odd number of slashes means | is escaped
-             // so we leave it alone
-             return '|';
-           } else {
-             // add space before unescaped |
-             return ' |';
-           }
-         }),
-             cells = row.split(/ \|/);
-         var i = 0;
+             function stubObject() {
+               return {};
+             }
+             /**
+              * This method returns an empty string.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.13.0
+              * @category Util
+              * @returns {string} Returns the empty string.
+              * @example
+              *
+              * _.times(2, _.stubString);
+              * // => ['', '']
+              */
 
-         if (cells.length > count) {
-           cells.splice(count);
-         } else {
-           while (cells.length < count) {
-             cells.push('');
-           }
-         }
 
-         for (; i < cells.length; i++) {
-           // leading or trailing whitespace is ignored per the gfm spec
-           cells[i] = cells[i].trim().replace(/\\\|/g, '|');
-         }
+             function stubString() {
+               return '';
+             }
+             /**
+              * This method returns `true`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.13.0
+              * @category Util
+              * @returns {boolean} Returns `true`.
+              * @example
+              *
+              * _.times(2, _.stubTrue);
+              * // => [true, true]
+              */
 
-         return cells;
-       } // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
-       // /c*$/ is vulnerable to REDOS.
-       // invert: Remove suffix of non-c chars instead. Default falsey.
 
+             function stubTrue() {
+               return true;
+             }
+             /**
+              * Invokes the iteratee `n` times, returning an array of the results of
+              * each invocation. The iteratee is invoked with one argument; (index).
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Util
+              * @param {number} n The number of times to invoke `iteratee`.
+              * @param {Function} [iteratee=_.identity] The function invoked per iteration.
+              * @returns {Array} Returns the array of results.
+              * @example
+              *
+              * _.times(3, String);
+              * // => ['0', '1', '2']
+              *
+              *  _.times(4, _.constant(0));
+              * // => [0, 0, 0, 0]
+              */
 
-       function rtrim$1(str, c, invert) {
-         var l = str.length;
 
-         if (l === 0) {
-           return '';
-         } // Length of suffix matching the invert condition.
+             function times(n, iteratee) {
+               n = toInteger(n);
 
+               if (n < 1 || n > MAX_SAFE_INTEGER) {
+                 return [];
+               }
 
-         var suffLen = 0; // Step left until we fail to match the invert condition.
+               var index = MAX_ARRAY_LENGTH,
+                   length = nativeMin(n, MAX_ARRAY_LENGTH);
+               iteratee = getIteratee(iteratee);
+               n -= MAX_ARRAY_LENGTH;
+               var result = baseTimes(length, iteratee);
 
-         while (suffLen < l) {
-           var currChar = str.charAt(l - suffLen - 1);
+               while (++index < n) {
+                 iteratee(index);
+               }
 
-           if (currChar === c && !invert) {
-             suffLen++;
-           } else if (currChar !== c && invert) {
-             suffLen++;
-           } else {
-             break;
-           }
-         }
+               return result;
+             }
+             /**
+              * Converts `value` to a property path array.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Util
+              * @param {*} value The value to convert.
+              * @returns {Array} Returns the new property path array.
+              * @example
+              *
+              * _.toPath('a.b.c');
+              * // => ['a', 'b', 'c']
+              *
+              * _.toPath('a[0].b.c');
+              * // => ['a', '0', 'b', 'c']
+              */
 
-         return str.substr(0, l - suffLen);
-       }
 
-       function findClosingBracket(str, b) {
-         if (str.indexOf(b[1]) === -1) {
-           return -1;
-         }
+             function toPath(value) {
+               if (isArray(value)) {
+                 return arrayMap(value, toKey);
+               }
 
-         var l = str.length;
-         var level = 0,
-             i = 0;
+               return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
+             }
+             /**
+              * Generates a unique ID. If `prefix` is given, the ID is appended to it.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Util
+              * @param {string} [prefix=''] The value to prefix the ID with.
+              * @returns {string} Returns the unique ID.
+              * @example
+              *
+              * _.uniqueId('contact_');
+              * // => 'contact_104'
+              *
+              * _.uniqueId();
+              * // => '105'
+              */
 
-         for (; i < l; i++) {
-           if (str[i] === '\\') {
-             i++;
-           } else if (str[i] === b[0]) {
-             level++;
-           } else if (str[i] === b[1]) {
-             level--;
 
-             if (level < 0) {
-               return i;
+             function uniqueId(prefix) {
+               var id = ++idCounter;
+               return toString(prefix) + id;
              }
-           }
-         }
+             /*------------------------------------------------------------------------*/
 
-         return -1;
-       }
+             /**
+              * Adds two numbers.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.4.0
+              * @category Math
+              * @param {number} augend The first number in an addition.
+              * @param {number} addend The second number in an addition.
+              * @returns {number} Returns the total.
+              * @example
+              *
+              * _.add(6, 4);
+              * // => 10
+              */
 
-       function checkSanitizeDeprecation(opt) {
-         if (opt && opt.sanitize && !opt.silent) {
-           console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
-         }
-       } // copied from https://stackoverflow.com/a/5450113/806777
 
+             var add = createMathOperation(function (augend, addend) {
+               return augend + addend;
+             }, 0);
+             /**
+              * Computes `number` rounded up to `precision`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.10.0
+              * @category Math
+              * @param {number} number The number to round up.
+              * @param {number} [precision=0] The precision to round up to.
+              * @returns {number} Returns the rounded up number.
+              * @example
+              *
+              * _.ceil(4.006);
+              * // => 5
+              *
+              * _.ceil(6.004, 2);
+              * // => 6.01
+              *
+              * _.ceil(6040, -2);
+              * // => 6100
+              */
 
-       function repeatString(pattern, count) {
-         if (count < 1) {
-           return '';
-         }
+             var ceil = createRound('ceil');
+             /**
+              * Divide two numbers.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.7.0
+              * @category Math
+              * @param {number} dividend The first number in a division.
+              * @param {number} divisor The second number in a division.
+              * @returns {number} Returns the quotient.
+              * @example
+              *
+              * _.divide(6, 4);
+              * // => 1.5
+              */
 
-         var result = '';
+             var divide = createMathOperation(function (dividend, divisor) {
+               return dividend / divisor;
+             }, 1);
+             /**
+              * Computes `number` rounded down to `precision`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.10.0
+              * @category Math
+              * @param {number} number The number to round down.
+              * @param {number} [precision=0] The precision to round down to.
+              * @returns {number} Returns the rounded down number.
+              * @example
+              *
+              * _.floor(4.006);
+              * // => 4
+              *
+              * _.floor(0.046, 2);
+              * // => 0.04
+              *
+              * _.floor(4060, -2);
+              * // => 4000
+              */
 
-         while (count > 1) {
-           if (count & 1) {
-             result += pattern;
-           }
+             var floor = createRound('floor');
+             /**
+              * Computes the maximum value of `array`. If `array` is empty or falsey,
+              * `undefined` is returned.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Math
+              * @param {Array} array The array to iterate over.
+              * @returns {*} Returns the maximum value.
+              * @example
+              *
+              * _.max([4, 2, 8, 6]);
+              * // => 8
+              *
+              * _.max([]);
+              * // => undefined
+              */
 
-           count >>= 1;
-           pattern += pattern;
-         }
+             function max(array) {
+               return array && array.length ? baseExtremum(array, identity, baseGt) : undefined$1;
+             }
+             /**
+              * This method is like `_.max` except that it accepts `iteratee` which is
+              * invoked for each element in `array` to generate the criterion by which
+              * the value is ranked. The iteratee is invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Math
+              * @param {Array} array The array to iterate over.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {*} Returns the maximum value.
+              * @example
+              *
+              * var objects = [{ 'n': 1 }, { 'n': 2 }];
+              *
+              * _.maxBy(objects, function(o) { return o.n; });
+              * // => { 'n': 2 }
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.maxBy(objects, 'n');
+              * // => { 'n': 2 }
+              */
 
-         return result + pattern;
-       }
 
-       var helpers = {
-         escape: escape$1,
-         unescape: unescape$1,
-         edit: edit,
-         cleanUrl: cleanUrl,
-         resolveUrl: resolveUrl,
-         noopTest: noopTest,
-         merge: merge$1,
-         splitCells: splitCells,
-         rtrim: rtrim$1,
-         findClosingBracket: findClosingBracket,
-         checkSanitizeDeprecation: checkSanitizeDeprecation,
-         repeatString: repeatString
-       };
+             function maxBy(array, iteratee) {
+               return array && array.length ? baseExtremum(array, getIteratee(iteratee, 2), baseGt) : undefined$1;
+             }
+             /**
+              * Computes the mean of the values in `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Math
+              * @param {Array} array The array to iterate over.
+              * @returns {number} Returns the mean.
+              * @example
+              *
+              * _.mean([4, 2, 8, 6]);
+              * // => 5
+              */
 
-       var defaults$1 = defaults.defaults;
-       var rtrim$2 = helpers.rtrim,
-           splitCells$1 = helpers.splitCells,
-           _escape = helpers.escape,
-           findClosingBracket$1 = helpers.findClosingBracket;
 
-       function outputLink(cap, link, raw) {
-         var href = link.href;
-         var title = link.title ? _escape(link.title) : null;
-         var text = cap[1].replace(/\\([\[\]])/g, '$1');
+             function mean(array) {
+               return baseMean(array, identity);
+             }
+             /**
+              * This method is like `_.mean` except that it accepts `iteratee` which is
+              * invoked for each element in `array` to generate the value to be averaged.
+              * The iteratee is invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.7.0
+              * @category Math
+              * @param {Array} array The array to iterate over.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {number} Returns the mean.
+              * @example
+              *
+              * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
+              *
+              * _.meanBy(objects, function(o) { return o.n; });
+              * // => 5
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.meanBy(objects, 'n');
+              * // => 5
+              */
 
-         if (cap[0].charAt(0) !== '!') {
-           return {
-             type: 'link',
-             raw: raw,
-             href: href,
-             title: title,
-             text: text
-           };
-         } else {
-           return {
-             type: 'image',
-             raw: raw,
-             href: href,
-             title: title,
-             text: _escape(text)
-           };
-         }
-       }
 
-       function indentCodeCompensation(raw, text) {
-         var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
+             function meanBy(array, iteratee) {
+               return baseMean(array, getIteratee(iteratee, 2));
+             }
+             /**
+              * Computes the minimum value of `array`. If `array` is empty or falsey,
+              * `undefined` is returned.
+              *
+              * @static
+              * @since 0.1.0
+              * @memberOf _
+              * @category Math
+              * @param {Array} array The array to iterate over.
+              * @returns {*} Returns the minimum value.
+              * @example
+              *
+              * _.min([4, 2, 8, 6]);
+              * // => 2
+              *
+              * _.min([]);
+              * // => undefined
+              */
 
-         if (matchIndentToCode === null) {
-           return text;
-         }
 
-         var indentToCode = matchIndentToCode[1];
-         return text.split('\n').map(function (node) {
-           var matchIndentInNode = node.match(/^\s+/);
+             function min(array) {
+               return array && array.length ? baseExtremum(array, identity, baseLt) : undefined$1;
+             }
+             /**
+              * This method is like `_.min` except that it accepts `iteratee` which is
+              * invoked for each element in `array` to generate the criterion by which
+              * the value is ranked. The iteratee is invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Math
+              * @param {Array} array The array to iterate over.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {*} Returns the minimum value.
+              * @example
+              *
+              * var objects = [{ 'n': 1 }, { 'n': 2 }];
+              *
+              * _.minBy(objects, function(o) { return o.n; });
+              * // => { 'n': 1 }
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.minBy(objects, 'n');
+              * // => { 'n': 1 }
+              */
 
-           if (matchIndentInNode === null) {
-             return node;
-           }
 
-           var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
-               indentInNode = _matchIndentInNode[0];
+             function minBy(array, iteratee) {
+               return array && array.length ? baseExtremum(array, getIteratee(iteratee, 2), baseLt) : undefined$1;
+             }
+             /**
+              * Multiply two numbers.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.7.0
+              * @category Math
+              * @param {number} multiplier The first number in a multiplication.
+              * @param {number} multiplicand The second number in a multiplication.
+              * @returns {number} Returns the product.
+              * @example
+              *
+              * _.multiply(6, 4);
+              * // => 24
+              */
 
-           if (indentInNode.length >= indentToCode.length) {
-             return node.slice(indentToCode.length);
-           }
 
-           return node;
-         }).join('\n');
-       }
-       /**
-        * Tokenizer
-        */
+             var multiply = createMathOperation(function (multiplier, multiplicand) {
+               return multiplier * multiplicand;
+             }, 1);
+             /**
+              * Computes `number` rounded to `precision`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.10.0
+              * @category Math
+              * @param {number} number The number to round.
+              * @param {number} [precision=0] The precision to round to.
+              * @returns {number} Returns the rounded number.
+              * @example
+              *
+              * _.round(4.006);
+              * // => 4
+              *
+              * _.round(4.006, 2);
+              * // => 4.01
+              *
+              * _.round(4060, -2);
+              * // => 4100
+              */
 
+             var round = createRound('round');
+             /**
+              * Subtract two numbers.
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Math
+              * @param {number} minuend The first number in a subtraction.
+              * @param {number} subtrahend The second number in a subtraction.
+              * @returns {number} Returns the difference.
+              * @example
+              *
+              * _.subtract(6, 4);
+              * // => 2
+              */
 
-       var Tokenizer_1 = /*#__PURE__*/function () {
-         function Tokenizer(options) {
-           _classCallCheck(this, Tokenizer);
+             var subtract = createMathOperation(function (minuend, subtrahend) {
+               return minuend - subtrahend;
+             }, 0);
+             /**
+              * Computes the sum of the values in `array`.
+              *
+              * @static
+              * @memberOf _
+              * @since 3.4.0
+              * @category Math
+              * @param {Array} array The array to iterate over.
+              * @returns {number} Returns the sum.
+              * @example
+              *
+              * _.sum([4, 2, 8, 6]);
+              * // => 20
+              */
 
-           this.options = options || defaults$1;
-         }
+             function sum(array) {
+               return array && array.length ? baseSum(array, identity) : 0;
+             }
+             /**
+              * This method is like `_.sum` except that it accepts `iteratee` which is
+              * invoked for each element in `array` to generate the value to be summed.
+              * The iteratee is invoked with one argument: (value).
+              *
+              * @static
+              * @memberOf _
+              * @since 4.0.0
+              * @category Math
+              * @param {Array} array The array to iterate over.
+              * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
+              * @returns {number} Returns the sum.
+              * @example
+              *
+              * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
+              *
+              * _.sumBy(objects, function(o) { return o.n; });
+              * // => 20
+              *
+              * // The `_.property` iteratee shorthand.
+              * _.sumBy(objects, 'n');
+              * // => 20
+              */
 
-         _createClass(Tokenizer, [{
-           key: "space",
-           value: function space(src) {
-             var cap = this.rules.block.newline.exec(src);
 
-             if (cap) {
-               if (cap[0].length > 1) {
-                 return {
-                   type: 'space',
-                   raw: cap[0]
-                 };
-               }
+             function sumBy(array, iteratee) {
+               return array && array.length ? baseSum(array, getIteratee(iteratee, 2)) : 0;
+             }
+             /*------------------------------------------------------------------------*/
+             // Add methods that return wrapped values in chain sequences.
+
+
+             lodash.after = after;
+             lodash.ary = ary;
+             lodash.assign = assign;
+             lodash.assignIn = assignIn;
+             lodash.assignInWith = assignInWith;
+             lodash.assignWith = assignWith;
+             lodash.at = at;
+             lodash.before = before;
+             lodash.bind = bind;
+             lodash.bindAll = bindAll;
+             lodash.bindKey = bindKey;
+             lodash.castArray = castArray;
+             lodash.chain = chain;
+             lodash.chunk = chunk;
+             lodash.compact = compact;
+             lodash.concat = concat;
+             lodash.cond = cond;
+             lodash.conforms = conforms;
+             lodash.constant = constant;
+             lodash.countBy = countBy;
+             lodash.create = create;
+             lodash.curry = curry;
+             lodash.curryRight = curryRight;
+             lodash.debounce = debounce;
+             lodash.defaults = defaults;
+             lodash.defaultsDeep = defaultsDeep;
+             lodash.defer = defer;
+             lodash.delay = delay;
+             lodash.difference = difference;
+             lodash.differenceBy = differenceBy;
+             lodash.differenceWith = differenceWith;
+             lodash.drop = drop;
+             lodash.dropRight = dropRight;
+             lodash.dropRightWhile = dropRightWhile;
+             lodash.dropWhile = dropWhile;
+             lodash.fill = fill;
+             lodash.filter = filter;
+             lodash.flatMap = flatMap;
+             lodash.flatMapDeep = flatMapDeep;
+             lodash.flatMapDepth = flatMapDepth;
+             lodash.flatten = flatten;
+             lodash.flattenDeep = flattenDeep;
+             lodash.flattenDepth = flattenDepth;
+             lodash.flip = flip;
+             lodash.flow = flow;
+             lodash.flowRight = flowRight;
+             lodash.fromPairs = fromPairs;
+             lodash.functions = functions;
+             lodash.functionsIn = functionsIn;
+             lodash.groupBy = groupBy;
+             lodash.initial = initial;
+             lodash.intersection = intersection;
+             lodash.intersectionBy = intersectionBy;
+             lodash.intersectionWith = intersectionWith;
+             lodash.invert = invert;
+             lodash.invertBy = invertBy;
+             lodash.invokeMap = invokeMap;
+             lodash.iteratee = iteratee;
+             lodash.keyBy = keyBy;
+             lodash.keys = keys;
+             lodash.keysIn = keysIn;
+             lodash.map = map;
+             lodash.mapKeys = mapKeys;
+             lodash.mapValues = mapValues;
+             lodash.matches = matches;
+             lodash.matchesProperty = matchesProperty;
+             lodash.memoize = memoize;
+             lodash.merge = merge;
+             lodash.mergeWith = mergeWith;
+             lodash.method = method;
+             lodash.methodOf = methodOf;
+             lodash.mixin = mixin;
+             lodash.negate = negate;
+             lodash.nthArg = nthArg;
+             lodash.omit = omit;
+             lodash.omitBy = omitBy;
+             lodash.once = once;
+             lodash.orderBy = orderBy;
+             lodash.over = over;
+             lodash.overArgs = overArgs;
+             lodash.overEvery = overEvery;
+             lodash.overSome = overSome;
+             lodash.partial = partial;
+             lodash.partialRight = partialRight;
+             lodash.partition = partition;
+             lodash.pick = pick;
+             lodash.pickBy = pickBy;
+             lodash.property = property;
+             lodash.propertyOf = propertyOf;
+             lodash.pull = pull;
+             lodash.pullAll = pullAll;
+             lodash.pullAllBy = pullAllBy;
+             lodash.pullAllWith = pullAllWith;
+             lodash.pullAt = pullAt;
+             lodash.range = range;
+             lodash.rangeRight = rangeRight;
+             lodash.rearg = rearg;
+             lodash.reject = reject;
+             lodash.remove = remove;
+             lodash.rest = rest;
+             lodash.reverse = reverse;
+             lodash.sampleSize = sampleSize;
+             lodash.set = set;
+             lodash.setWith = setWith;
+             lodash.shuffle = shuffle;
+             lodash.slice = slice;
+             lodash.sortBy = sortBy;
+             lodash.sortedUniq = sortedUniq;
+             lodash.sortedUniqBy = sortedUniqBy;
+             lodash.split = split;
+             lodash.spread = spread;
+             lodash.tail = tail;
+             lodash.take = take;
+             lodash.takeRight = takeRight;
+             lodash.takeRightWhile = takeRightWhile;
+             lodash.takeWhile = takeWhile;
+             lodash.tap = tap;
+             lodash.throttle = throttle;
+             lodash.thru = thru;
+             lodash.toArray = toArray;
+             lodash.toPairs = toPairs;
+             lodash.toPairsIn = toPairsIn;
+             lodash.toPath = toPath;
+             lodash.toPlainObject = toPlainObject;
+             lodash.transform = transform;
+             lodash.unary = unary;
+             lodash.union = union;
+             lodash.unionBy = unionBy;
+             lodash.unionWith = unionWith;
+             lodash.uniq = uniq;
+             lodash.uniqBy = uniqBy;
+             lodash.uniqWith = uniqWith;
+             lodash.unset = unset;
+             lodash.unzip = unzip;
+             lodash.unzipWith = unzipWith;
+             lodash.update = update;
+             lodash.updateWith = updateWith;
+             lodash.values = values;
+             lodash.valuesIn = valuesIn;
+             lodash.without = without;
+             lodash.words = words;
+             lodash.wrap = wrap;
+             lodash.xor = xor;
+             lodash.xorBy = xorBy;
+             lodash.xorWith = xorWith;
+             lodash.zip = zip;
+             lodash.zipObject = zipObject;
+             lodash.zipObjectDeep = zipObjectDeep;
+             lodash.zipWith = zipWith; // Add aliases.
+
+             lodash.entries = toPairs;
+             lodash.entriesIn = toPairsIn;
+             lodash.extend = assignIn;
+             lodash.extendWith = assignInWith; // Add methods to `lodash.prototype`.
+
+             mixin(lodash, lodash);
+             /*------------------------------------------------------------------------*/
+             // Add methods that return unwrapped values in chain sequences.
+
+             lodash.add = add;
+             lodash.attempt = attempt;
+             lodash.camelCase = camelCase;
+             lodash.capitalize = capitalize;
+             lodash.ceil = ceil;
+             lodash.clamp = clamp;
+             lodash.clone = clone;
+             lodash.cloneDeep = cloneDeep;
+             lodash.cloneDeepWith = cloneDeepWith;
+             lodash.cloneWith = cloneWith;
+             lodash.conformsTo = conformsTo;
+             lodash.deburr = deburr;
+             lodash.defaultTo = defaultTo;
+             lodash.divide = divide;
+             lodash.endsWith = endsWith;
+             lodash.eq = eq;
+             lodash.escape = escape;
+             lodash.escapeRegExp = escapeRegExp;
+             lodash.every = every;
+             lodash.find = find;
+             lodash.findIndex = findIndex;
+             lodash.findKey = findKey;
+             lodash.findLast = findLast;
+             lodash.findLastIndex = findLastIndex;
+             lodash.findLastKey = findLastKey;
+             lodash.floor = floor;
+             lodash.forEach = forEach;
+             lodash.forEachRight = forEachRight;
+             lodash.forIn = forIn;
+             lodash.forInRight = forInRight;
+             lodash.forOwn = forOwn;
+             lodash.forOwnRight = forOwnRight;
+             lodash.get = get;
+             lodash.gt = gt;
+             lodash.gte = gte;
+             lodash.has = has;
+             lodash.hasIn = hasIn;
+             lodash.head = head;
+             lodash.identity = identity;
+             lodash.includes = includes;
+             lodash.indexOf = indexOf;
+             lodash.inRange = inRange;
+             lodash.invoke = invoke;
+             lodash.isArguments = isArguments;
+             lodash.isArray = isArray;
+             lodash.isArrayBuffer = isArrayBuffer;
+             lodash.isArrayLike = isArrayLike;
+             lodash.isArrayLikeObject = isArrayLikeObject;
+             lodash.isBoolean = isBoolean;
+             lodash.isBuffer = isBuffer;
+             lodash.isDate = isDate;
+             lodash.isElement = isElement;
+             lodash.isEmpty = isEmpty;
+             lodash.isEqual = isEqual;
+             lodash.isEqualWith = isEqualWith;
+             lodash.isError = isError;
+             lodash.isFinite = isFinite;
+             lodash.isFunction = isFunction;
+             lodash.isInteger = isInteger;
+             lodash.isLength = isLength;
+             lodash.isMap = isMap;
+             lodash.isMatch = isMatch;
+             lodash.isMatchWith = isMatchWith;
+             lodash.isNaN = isNaN;
+             lodash.isNative = isNative;
+             lodash.isNil = isNil;
+             lodash.isNull = isNull;
+             lodash.isNumber = isNumber;
+             lodash.isObject = isObject;
+             lodash.isObjectLike = isObjectLike;
+             lodash.isPlainObject = isPlainObject;
+             lodash.isRegExp = isRegExp;
+             lodash.isSafeInteger = isSafeInteger;
+             lodash.isSet = isSet;
+             lodash.isString = isString;
+             lodash.isSymbol = isSymbol;
+             lodash.isTypedArray = isTypedArray;
+             lodash.isUndefined = isUndefined;
+             lodash.isWeakMap = isWeakMap;
+             lodash.isWeakSet = isWeakSet;
+             lodash.join = join;
+             lodash.kebabCase = kebabCase;
+             lodash.last = last;
+             lodash.lastIndexOf = lastIndexOf;
+             lodash.lowerCase = lowerCase;
+             lodash.lowerFirst = lowerFirst;
+             lodash.lt = lt;
+             lodash.lte = lte;
+             lodash.max = max;
+             lodash.maxBy = maxBy;
+             lodash.mean = mean;
+             lodash.meanBy = meanBy;
+             lodash.min = min;
+             lodash.minBy = minBy;
+             lodash.stubArray = stubArray;
+             lodash.stubFalse = stubFalse;
+             lodash.stubObject = stubObject;
+             lodash.stubString = stubString;
+             lodash.stubTrue = stubTrue;
+             lodash.multiply = multiply;
+             lodash.nth = nth;
+             lodash.noConflict = noConflict;
+             lodash.noop = noop;
+             lodash.now = now;
+             lodash.pad = pad;
+             lodash.padEnd = padEnd;
+             lodash.padStart = padStart;
+             lodash.parseInt = parseInt;
+             lodash.random = random;
+             lodash.reduce = reduce;
+             lodash.reduceRight = reduceRight;
+             lodash.repeat = repeat;
+             lodash.replace = replace;
+             lodash.result = result;
+             lodash.round = round;
+             lodash.runInContext = runInContext;
+             lodash.sample = sample;
+             lodash.size = size;
+             lodash.snakeCase = snakeCase;
+             lodash.some = some;
+             lodash.sortedIndex = sortedIndex;
+             lodash.sortedIndexBy = sortedIndexBy;
+             lodash.sortedIndexOf = sortedIndexOf;
+             lodash.sortedLastIndex = sortedLastIndex;
+             lodash.sortedLastIndexBy = sortedLastIndexBy;
+             lodash.sortedLastIndexOf = sortedLastIndexOf;
+             lodash.startCase = startCase;
+             lodash.startsWith = startsWith;
+             lodash.subtract = subtract;
+             lodash.sum = sum;
+             lodash.sumBy = sumBy;
+             lodash.template = template;
+             lodash.times = times;
+             lodash.toFinite = toFinite;
+             lodash.toInteger = toInteger;
+             lodash.toLength = toLength;
+             lodash.toLower = toLower;
+             lodash.toNumber = toNumber;
+             lodash.toSafeInteger = toSafeInteger;
+             lodash.toString = toString;
+             lodash.toUpper = toUpper;
+             lodash.trim = trim;
+             lodash.trimEnd = trimEnd;
+             lodash.trimStart = trimStart;
+             lodash.truncate = truncate;
+             lodash.unescape = unescape;
+             lodash.uniqueId = uniqueId;
+             lodash.upperCase = upperCase;
+             lodash.upperFirst = upperFirst; // Add aliases.
+
+             lodash.each = forEach;
+             lodash.eachRight = forEachRight;
+             lodash.first = head;
+             mixin(lodash, function () {
+               var source = {};
+               baseForOwn(lodash, function (func, methodName) {
+                 if (!hasOwnProperty.call(lodash.prototype, methodName)) {
+                   source[methodName] = func;
+                 }
+               });
+               return source;
+             }(), {
+               'chain': false
+             });
+             /*------------------------------------------------------------------------*/
 
-               return {
-                 raw: '\n'
-               };
-             }
-           }
-         }, {
-           key: "code",
-           value: function code(src, tokens) {
-             var cap = this.rules.block.code.exec(src);
+             /**
+              * The semantic version number.
+              *
+              * @static
+              * @memberOf _
+              * @type {string}
+              */
 
-             if (cap) {
-               var lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.
+             lodash.VERSION = VERSION; // Assign default placeholders.
 
-               if (lastToken && lastToken.type === 'paragraph') {
-                 return {
-                   raw: cap[0],
-                   text: cap[0].trimRight()
-                 };
-               }
+             arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function (methodName) {
+               lodash[methodName].placeholder = lodash;
+             }); // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
 
-               var text = cap[0].replace(/^ {4}/gm, '');
-               return {
-                 type: 'code',
-                 raw: cap[0],
-                 codeBlockStyle: 'indented',
-                 text: !this.options.pedantic ? rtrim$2(text, '\n') : text
-               };
-             }
-           }
-         }, {
-           key: "fences",
-           value: function fences(src) {
-             var cap = this.rules.block.fences.exec(src);
+             arrayEach(['drop', 'take'], function (methodName, index) {
+               LazyWrapper.prototype[methodName] = function (n) {
+                 n = n === undefined$1 ? 1 : nativeMax(toInteger(n), 0);
+                 var result = this.__filtered__ && !index ? new LazyWrapper(this) : this.clone();
 
-             if (cap) {
-               var raw = cap[0];
-               var text = indentCodeCompensation(raw, cap[3] || '');
-               return {
-                 type: 'code',
-                 raw: raw,
-                 lang: cap[2] ? cap[2].trim() : cap[2],
-                 text: text
-               };
-             }
-           }
-         }, {
-           key: "heading",
-           value: function heading(src) {
-             var cap = this.rules.block.heading.exec(src);
+                 if (result.__filtered__) {
+                   result.__takeCount__ = nativeMin(n, result.__takeCount__);
+                 } else {
+                   result.__views__.push({
+                     'size': nativeMin(n, MAX_ARRAY_LENGTH),
+                     'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
+                   });
+                 }
 
-             if (cap) {
-               return {
-                 type: 'heading',
-                 raw: cap[0],
-                 depth: cap[1].length,
-                 text: cap[2]
+                 return result;
                };
-             }
-           }
-         }, {
-           key: "nptable",
-           value: function nptable(src) {
-             var cap = this.rules.block.nptable.exec(src);
 
-             if (cap) {
-               var item = {
-                 type: 'table',
-                 header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-                 align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-                 cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
-                 raw: cap[0]
+               LazyWrapper.prototype[methodName + 'Right'] = function (n) {
+                 return this.reverse()[methodName](n).reverse();
                };
+             }); // Add `LazyWrapper` methods that accept an `iteratee` value.
 
-               if (item.header.length === item.align.length) {
-                 var l = item.align.length;
-                 var i;
+             arrayEach(['filter', 'map', 'takeWhile'], function (methodName, index) {
+               var type = index + 1,
+                   isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
 
-                 for (i = 0; i < l; i++) {
-                   if (/^ *-+: *$/.test(item.align[i])) {
-                     item.align[i] = 'right';
-                   } else if (/^ *:-+: *$/.test(item.align[i])) {
-                     item.align[i] = 'center';
-                   } else if (/^ *:-+ *$/.test(item.align[i])) {
-                     item.align[i] = 'left';
-                   } else {
-                     item.align[i] = null;
-                   }
-                 }
+               LazyWrapper.prototype[methodName] = function (iteratee) {
+                 var result = this.clone();
 
-                 l = item.cells.length;
+                 result.__iteratees__.push({
+                   'iteratee': getIteratee(iteratee, 3),
+                   'type': type
+                 });
 
-                 for (i = 0; i < l; i++) {
-                   item.cells[i] = splitCells$1(item.cells[i], item.header.length);
-                 }
+                 result.__filtered__ = result.__filtered__ || isFilter;
+                 return result;
+               };
+             }); // Add `LazyWrapper` methods for `_.head` and `_.last`.
 
-                 return item;
-               }
-             }
-           }
-         }, {
-           key: "hr",
-           value: function hr(src) {
-             var cap = this.rules.block.hr.exec(src);
+             arrayEach(['head', 'last'], function (methodName, index) {
+               var takeName = 'take' + (index ? 'Right' : '');
 
-             if (cap) {
-               return {
-                 type: 'hr',
-                 raw: cap[0]
+               LazyWrapper.prototype[methodName] = function () {
+                 return this[takeName](1).value()[0];
                };
-             }
-           }
-         }, {
-           key: "blockquote",
-           value: function blockquote(src) {
-             var cap = this.rules.block.blockquote.exec(src);
+             }); // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
 
-             if (cap) {
-               var text = cap[0].replace(/^ *> ?/gm, '');
-               return {
-                 type: 'blockquote',
-                 raw: cap[0],
-                 text: text
+             arrayEach(['initial', 'tail'], function (methodName, index) {
+               var dropName = 'drop' + (index ? '' : 'Right');
+
+               LazyWrapper.prototype[methodName] = function () {
+                 return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
                };
-             }
-           }
-         }, {
-           key: "list",
-           value: function list(src) {
-             var cap = this.rules.block.list.exec(src);
+             });
 
-             if (cap) {
-               var raw = cap[0];
-               var bull = cap[2];
-               var isordered = bull.length > 1;
-               var isparen = bull[bull.length - 1] === ')';
-               var list = {
-                 type: 'list',
-                 raw: raw,
-                 ordered: isordered,
-                 start: isordered ? +bull.slice(0, -1) : '',
-                 loose: false,
-                 items: []
-               }; // Get each top-level item.
+             LazyWrapper.prototype.compact = function () {
+               return this.filter(identity);
+             };
 
-               var itemMatch = cap[0].match(this.rules.block.item);
-               var next = false,
-                   item,
-                   space,
-                   b,
-                   addBack,
-                   loose,
-                   istask,
-                   ischecked;
-               var l = itemMatch.length;
+             LazyWrapper.prototype.find = function (predicate) {
+               return this.filter(predicate).head();
+             };
 
-               for (var i = 0; i < l; i++) {
-                 item = itemMatch[i];
-                 raw = item; // Remove the list item's bullet
-                 // so it is seen as the next token.
+             LazyWrapper.prototype.findLast = function (predicate) {
+               return this.reverse().find(predicate);
+             };
 
-                 space = item.length;
-                 item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
-                 // list item contains. Hacky.
+             LazyWrapper.prototype.invokeMap = baseRest(function (path, args) {
+               if (typeof path == 'function') {
+                 return new LazyWrapper(this);
+               }
 
-                 if (~item.indexOf('\n ')) {
-                   space -= item.length;
-                   item = !this.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');
-                 } // Determine whether the next list item belongs here.
-                 // Backpedal if it does not belong in this list.
+               return this.map(function (value) {
+                 return baseInvoke(value, path, args);
+               });
+             });
 
+             LazyWrapper.prototype.reject = function (predicate) {
+               return this.filter(negate(getIteratee(predicate)));
+             };
 
-                 if (i !== l - 1) {
-                   b = this.rules.block.bullet.exec(itemMatch[i + 1])[0];
+             LazyWrapper.prototype.slice = function (start, end) {
+               start = toInteger(start);
+               var result = this;
 
-                   if (isordered ? b.length === 1 || !isparen && b[b.length - 1] === ')' : b.length > 1 || this.options.smartLists && b !== bull) {
-                     addBack = itemMatch.slice(i + 1).join('\n');
-                     list.raw = list.raw.substring(0, list.raw.length - addBack.length);
-                     i = l - 1;
-                   }
-                 } // Determine whether item is loose or not.
-                 // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
-                 // for discount behavior.
+               if (result.__filtered__ && (start > 0 || end < 0)) {
+                 return new LazyWrapper(result);
+               }
 
+               if (start < 0) {
+                 result = result.takeRight(-start);
+               } else if (start) {
+                 result = result.drop(start);
+               }
 
-                 loose = next || /\n\n(?!\s*$)/.test(item);
+               if (end !== undefined$1) {
+                 end = toInteger(end);
+                 result = end < 0 ? result.dropRight(-end) : result.take(end - start);
+               }
 
-                 if (i !== l - 1) {
-                   next = item.charAt(item.length - 1) === '\n';
-                   if (!loose) loose = next;
-                 }
+               return result;
+             };
 
-                 if (loose) {
-                   list.loose = true;
-                 } // Check for task list items
+             LazyWrapper.prototype.takeRightWhile = function (predicate) {
+               return this.reverse().takeWhile(predicate).reverse();
+             };
 
+             LazyWrapper.prototype.toArray = function () {
+               return this.take(MAX_ARRAY_LENGTH);
+             }; // Add `LazyWrapper` methods to `lodash.prototype`.
 
-                 istask = /^\[[ xX]\] /.test(item);
-                 ischecked = undefined;
 
-                 if (istask) {
-                   ischecked = item[1] !== ' ';
-                   item = item.replace(/^\[[ xX]\] +/, '');
-                 }
+             baseForOwn(LazyWrapper.prototype, function (func, methodName) {
+               var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
+                   isTaker = /^(?:head|last)$/.test(methodName),
+                   lodashFunc = lodash[isTaker ? 'take' + (methodName == 'last' ? 'Right' : '') : methodName],
+                   retUnwrapped = isTaker || /^find/.test(methodName);
 
-                 list.items.push({
-                   type: 'list_item',
-                   raw: raw,
-                   task: istask,
-                   checked: ischecked,
-                   loose: loose,
-                   text: item
-                 });
+               if (!lodashFunc) {
+                 return;
                }
 
-               return list;
-             }
-           }
-         }, {
-           key: "html",
-           value: function html(src) {
-             var cap = this.rules.block.html.exec(src);
-
-             if (cap) {
-               return {
-                 type: this.options.sanitize ? 'paragraph' : 'html',
-                 raw: cap[0],
-                 pre: !this.options.sanitizer && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
-                 text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
-               };
-             }
-           }
-         }, {
-           key: "def",
-           value: function def(src) {
-             var cap = this.rules.block.def.exec(src);
+               lodash.prototype[methodName] = function () {
+                 var value = this.__wrapped__,
+                     args = isTaker ? [1] : arguments,
+                     isLazy = value instanceof LazyWrapper,
+                     iteratee = args[0],
+                     useLazy = isLazy || isArray(value);
 
-             if (cap) {
-               if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
-               var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
-               return {
-                 tag: tag,
-                 raw: cap[0],
-                 href: cap[2],
-                 title: cap[3]
-               };
-             }
-           }
-         }, {
-           key: "table",
-           value: function table(src) {
-             var cap = this.rules.block.table.exec(src);
+                 var interceptor = function interceptor(value) {
+                   var result = lodashFunc.apply(lodash, arrayPush([value], args));
+                   return isTaker && chainAll ? result[0] : result;
+                 };
 
-             if (cap) {
-               var item = {
-                 type: 'table',
-                 header: splitCells$1(cap[1].replace(/^ *| *\| *$/g, '')),
-                 align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
-                 cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
-               };
+                 if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
+                   // Avoid lazy use if the iteratee has a "length" value other than `1`.
+                   isLazy = useLazy = false;
+                 }
 
-               if (item.header.length === item.align.length) {
-                 item.raw = cap[0];
-                 var l = item.align.length;
-                 var i;
+                 var chainAll = this.__chain__,
+                     isHybrid = !!this.__actions__.length,
+                     isUnwrapped = retUnwrapped && !chainAll,
+                     onlyLazy = isLazy && !isHybrid;
 
-                 for (i = 0; i < l; i++) {
-                   if (/^ *-+: *$/.test(item.align[i])) {
-                     item.align[i] = 'right';
-                   } else if (/^ *:-+: *$/.test(item.align[i])) {
-                     item.align[i] = 'center';
-                   } else if (/^ *:-+ *$/.test(item.align[i])) {
-                     item.align[i] = 'left';
-                   } else {
-                     item.align[i] = null;
-                   }
-                 }
+                 if (!retUnwrapped && useLazy) {
+                   value = onlyLazy ? value : new LazyWrapper(this);
+                   var result = func.apply(value, args);
 
-                 l = item.cells.length;
+                   result.__actions__.push({
+                     'func': thru,
+                     'args': [interceptor],
+                     'thisArg': undefined$1
+                   });
 
-                 for (i = 0; i < l; i++) {
-                   item.cells[i] = splitCells$1(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+                   return new LodashWrapper(result, chainAll);
                  }
 
-                 return item;
-               }
-             }
-           }
-         }, {
-           key: "lheading",
-           value: function lheading(src) {
-             var cap = this.rules.block.lheading.exec(src);
+                 if (isUnwrapped && onlyLazy) {
+                   return func.apply(this, args);
+                 }
 
-             if (cap) {
-               return {
-                 type: 'heading',
-                 raw: cap[0],
-                 depth: cap[2].charAt(0) === '=' ? 1 : 2,
-                 text: cap[1]
+                 result = this.thru(interceptor);
+                 return isUnwrapped ? isTaker ? result.value()[0] : result.value() : result;
                };
-             }
-           }
-         }, {
-           key: "paragraph",
-           value: function paragraph(src) {
-             var cap = this.rules.block.paragraph.exec(src);
+             }); // Add `Array` methods to `lodash.prototype`.
 
-             if (cap) {
-               return {
-                 type: 'paragraph',
-                 raw: cap[0],
-                 text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
-               };
-             }
-           }
-         }, {
-           key: "text",
-           value: function text(src, tokens) {
-             var cap = this.rules.block.text.exec(src);
+             arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function (methodName) {
+               var func = arrayProto[methodName],
+                   chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
+                   retUnwrapped = /^(?:pop|shift)$/.test(methodName);
 
-             if (cap) {
-               var lastToken = tokens[tokens.length - 1];
+               lodash.prototype[methodName] = function () {
+                 var args = arguments;
 
-               if (lastToken && lastToken.type === 'text') {
-                 return {
-                   raw: cap[0],
-                   text: cap[0]
-                 };
-               }
+                 if (retUnwrapped && !this.__chain__) {
+                   var value = this.value();
+                   return func.apply(isArray(value) ? value : [], args);
+                 }
 
-               return {
-                 type: 'text',
-                 raw: cap[0],
-                 text: cap[0]
+                 return this[chainName](function (value) {
+                   return func.apply(isArray(value) ? value : [], args);
+                 });
                };
-             }
-           }
-         }, {
-           key: "escape",
-           value: function escape(src) {
-             var cap = this.rules.inline.escape.exec(src);
+             }); // Map minified method names to their real names.
 
-             if (cap) {
-               return {
-                 type: 'escape',
-                 raw: cap[0],
-                 text: _escape(cap[1])
-               };
-             }
-           }
-         }, {
-           key: "tag",
-           value: function tag(src, inLink, inRawBlock) {
-             var cap = this.rules.inline.tag.exec(src);
+             baseForOwn(LazyWrapper.prototype, function (func, methodName) {
+               var lodashFunc = lodash[methodName];
 
-             if (cap) {
-               if (!inLink && /^<a /i.test(cap[0])) {
-                 inLink = true;
-               } else if (inLink && /^<\/a>/i.test(cap[0])) {
-                 inLink = false;
-               }
+               if (lodashFunc) {
+                 var key = lodashFunc.name + '';
 
-               if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-                 inRawBlock = true;
-               } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
-                 inRawBlock = false;
+                 if (!hasOwnProperty.call(realNames, key)) {
+                   realNames[key] = [];
+                 }
+
+                 realNames[key].push({
+                   'name': methodName,
+                   'func': lodashFunc
+                 });
                }
+             });
+             realNames[createHybrid(undefined$1, WRAP_BIND_KEY_FLAG).name] = [{
+               'name': 'wrapper',
+               'func': undefined$1
+             }]; // Add methods to `LazyWrapper`.
 
-               return {
-                 type: this.options.sanitize ? 'text' : 'html',
-                 raw: cap[0],
-                 inLink: inLink,
-                 inRawBlock: inRawBlock,
-                 text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
-               };
+             LazyWrapper.prototype.clone = lazyClone;
+             LazyWrapper.prototype.reverse = lazyReverse;
+             LazyWrapper.prototype.value = lazyValue; // Add chain sequence methods to the `lodash` wrapper.
+
+             lodash.prototype.at = wrapperAt;
+             lodash.prototype.chain = wrapperChain;
+             lodash.prototype.commit = wrapperCommit;
+             lodash.prototype.next = wrapperNext;
+             lodash.prototype.plant = wrapperPlant;
+             lodash.prototype.reverse = wrapperReverse;
+             lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue; // Add lazy aliases.
+
+             lodash.prototype.first = lodash.prototype.head;
+
+             if (symIterator) {
+               lodash.prototype[symIterator] = wrapperToIterator;
              }
-           }
-         }, {
-           key: "link",
-           value: function link(src) {
-             var cap = this.rules.inline.link.exec(src);
 
-             if (cap) {
-               var lastParenIndex = findClosingBracket$1(cap[2], '()');
+             return lodash;
+           };
+           /*--------------------------------------------------------------------------*/
+           // Export lodash.
 
-               if (lastParenIndex > -1) {
-                 var start = cap[0].indexOf('!') === 0 ? 5 : 4;
-                 var linkLen = start + cap[1].length + lastParenIndex;
-                 cap[2] = cap[2].substring(0, lastParenIndex);
-                 cap[0] = cap[0].substring(0, linkLen).trim();
-                 cap[3] = '';
-               }
 
-               var href = cap[2];
-               var title = '';
+           var _ = runInContext(); // Some AMD build optimizers, like r.js, check for condition patterns like:
 
-               if (this.options.pedantic) {
-                 var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
 
-                 if (link) {
-                   href = link[1];
-                   title = link[3];
-                 } else {
-                   title = '';
-                 }
-               } else {
-                 title = cap[3] ? cap[3].slice(1, -1) : '';
-               }
+           if (freeModule) {
+             // Export for Node.js.
+             (freeModule.exports = _)._ = _; // Export for CommonJS support.
 
-               href = href.trim().replace(/^<([\s\S]*)>$/, '$1');
-               var token = outputLink(cap, {
-                 href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
-                 title: title ? title.replace(this.rules.inline._escapes, '$1') : title
-               }, cap[0]);
-               return token;
-             }
+             freeExports._ = _;
+           } else {
+             // Export to the global object.
+             root._ = _;
            }
-         }, {
-           key: "reflink",
-           value: function reflink(src, links) {
-             var cap;
+         }).call(commonjsGlobal);
+       })(lodash, lodash.exports);
 
-             if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {
-               var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
-               link = links[link.toLowerCase()];
+       function actionMergeRemoteChanges(id, localGraph, remoteGraph, discardTags, formatUser) {
+         discardTags = discardTags || {};
+         var _option = 'safe'; // 'safe', 'force_local', 'force_remote'
 
-               if (!link || !link.href) {
-                 var text = cap[0].charAt(0);
-                 return {
-                   type: 'text',
-                   raw: text,
-                   text: text
-                 };
-               }
+         var _conflicts = [];
 
-               var token = outputLink(cap, link, cap[0]);
-               return token;
-             }
+         function user(d) {
+           return typeof formatUser === 'function' ? formatUser(d) : lodash.exports.escape(d);
+         }
+
+         function mergeLocation(remote, target) {
+           function pointEqual(a, b) {
+             var epsilon = 1e-6;
+             return Math.abs(a[0] - b[0]) < epsilon && Math.abs(a[1] - b[1]) < epsilon;
            }
-         }, {
-           key: "strong",
-           value: function strong(src, maskedSrc) {
-             var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
-             var match = this.rules.inline.strong.start.exec(src);
 
-             if (match && (!match[1] || match[1] && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
-               maskedSrc = maskedSrc.slice(-1 * src.length);
-               var endReg = match[0] === '**' ? this.rules.inline.strong.endAst : this.rules.inline.strong.endUnd;
-               endReg.lastIndex = 0;
-               var cap;
+           if (_option === 'force_local' || pointEqual(target.loc, remote.loc)) {
+             return target;
+           }
 
-               while ((match = endReg.exec(maskedSrc)) != null) {
-                 cap = this.rules.inline.strong.middle.exec(maskedSrc.slice(0, match.index + 3));
+           if (_option === 'force_remote') {
+             return target.update({
+               loc: remote.loc
+             });
+           }
 
-                 if (cap) {
-                   return {
-                     type: 'strong',
-                     raw: src.slice(0, cap[0].length),
-                     text: src.slice(2, cap[0].length - 2)
-                   };
-                 }
-               }
+           _conflicts.push(_t.html('merge_remote_changes.conflict.location', {
+             user: {
+               html: user(remote.user)
              }
+           }));
+
+           return target;
+         }
+
+         function mergeNodes(base, remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.nodes, remote.nodes)) {
+             return target;
            }
-         }, {
-           key: "em",
-           value: function em(src, maskedSrc) {
-             var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
-             var match = this.rules.inline.em.start.exec(src);
 
-             if (match && (!match[1] || match[1] && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar)))) {
-               maskedSrc = maskedSrc.slice(-1 * src.length);
-               var endReg = match[0] === '*' ? this.rules.inline.em.endAst : this.rules.inline.em.endUnd;
-               endReg.lastIndex = 0;
-               var cap;
+           if (_option === 'force_remote') {
+             return target.update({
+               nodes: remote.nodes
+             });
+           }
 
-               while ((match = endReg.exec(maskedSrc)) != null) {
-                 cap = this.rules.inline.em.middle.exec(maskedSrc.slice(0, match.index + 2));
+           var ccount = _conflicts.length;
+           var o = base.nodes || [];
+           var a = target.nodes || [];
+           var b = remote.nodes || [];
+           var nodes = [];
+           var hunks = diff3Merge(a, o, b, {
+             excludeFalseConflicts: true
+           });
 
-                 if (cap) {
-                   return {
-                     type: 'em',
-                     raw: src.slice(0, cap[0].length),
-                     text: src.slice(1, cap[0].length - 1)
-                   };
-                 }
+           for (var i = 0; i < hunks.length; i++) {
+             var hunk = hunks[i];
+
+             if (hunk.ok) {
+               nodes.push.apply(nodes, hunk.ok);
+             } else {
+               // for all conflicts, we can assume c.a !== c.b
+               // because `diff3Merge` called with `true` option to exclude false conflicts..
+               var c = hunk.conflict;
+
+               if (fastDeepEqual(c.o, c.a)) {
+                 // only changed remotely
+                 nodes.push.apply(nodes, c.b);
+               } else if (fastDeepEqual(c.o, c.b)) {
+                 // only changed locally
+                 nodes.push.apply(nodes, c.a);
+               } else {
+                 // changed both locally and remotely
+                 _conflicts.push(_t.html('merge_remote_changes.conflict.nodelist', {
+                   user: {
+                     html: user(remote.user)
+                   }
+                 }));
+
+                 break;
                }
              }
            }
-         }, {
-           key: "codespan",
-           value: function codespan(src) {
-             var cap = this.rules.inline.code.exec(src);
 
-             if (cap) {
-               var text = cap[2].replace(/\n/g, ' ');
-               var hasNonSpaceChars = /[^ ]/.test(text);
-               var hasSpaceCharsOnBothEnds = text.startsWith(' ') && text.endsWith(' ');
+           return _conflicts.length === ccount ? target.update({
+             nodes: nodes
+           }) : target;
+         }
 
-               if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
-                 text = text.substring(1, text.length - 1);
+         function mergeChildren(targetWay, children, updates, graph) {
+           function isUsed(node, targetWay) {
+             var hasInterestingParent = graph.parentWays(node).some(function (way) {
+               return way.id !== targetWay.id;
+             });
+             return node.hasInterestingTags() || hasInterestingParent || graph.parentRelations(node).length > 0;
+           }
+
+           var ccount = _conflicts.length;
+
+           for (var i = 0; i < children.length; i++) {
+             var id = children[i];
+             var node = graph.hasEntity(id); // remove unused childNodes..
+
+             if (targetWay.nodes.indexOf(id) === -1) {
+               if (node && !isUsed(node, targetWay)) {
+                 updates.removeIds.push(id);
                }
 
-               text = _escape(text, true);
-               return {
-                 type: 'codespan',
-                 raw: cap[0],
-                 text: text
-               };
-             }
-           }
-         }, {
-           key: "br",
-           value: function br(src) {
-             var cap = this.rules.inline.br.exec(src);
+               continue;
+             } // restore used childNodes..
 
-             if (cap) {
-               return {
-                 type: 'br',
-                 raw: cap[0]
-               };
-             }
-           }
-         }, {
-           key: "del",
-           value: function del(src) {
-             var cap = this.rules.inline.del.exec(src);
 
-             if (cap) {
-               return {
-                 type: 'del',
-                 raw: cap[0],
-                 text: cap[1]
-               };
-             }
-           }
-         }, {
-           key: "autolink",
-           value: function autolink(src, mangle) {
-             var cap = this.rules.inline.autolink.exec(src);
+             var local = localGraph.hasEntity(id);
+             var remote = remoteGraph.hasEntity(id);
+             var target;
+
+             if (_option === 'force_remote' && remote && remote.visible) {
+               updates.replacements.push(remote);
+             } else if (_option === 'force_local' && local) {
+               target = osmEntity(local);
+
+               if (remote) {
+                 target = target.update({
+                   version: remote.version
+                 });
+               }
 
-             if (cap) {
-               var text, href;
+               updates.replacements.push(target);
+             } else if (_option === 'safe' && local && remote && local.version !== remote.version) {
+               target = osmEntity(local, {
+                 version: remote.version
+               });
 
-               if (cap[2] === '@') {
-                 text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
-                 href = 'mailto:' + text;
+               if (remote.visible) {
+                 target = mergeLocation(remote, target);
                } else {
-                 text = _escape(cap[1]);
-                 href = text;
+                 _conflicts.push(_t.html('merge_remote_changes.conflict.deleted', {
+                   user: {
+                     html: user(remote.user)
+                   }
+                 }));
                }
 
-               return {
-                 type: 'link',
-                 raw: cap[0],
-                 text: text,
-                 href: href,
-                 tokens: [{
-                   type: 'text',
-                   raw: text,
-                   text: text
-                 }]
-               };
+               if (_conflicts.length !== ccount) break;
+               updates.replacements.push(target);
              }
            }
-         }, {
-           key: "url",
-           value: function url(src, mangle) {
-             var cap;
 
-             if (cap = this.rules.inline.url.exec(src)) {
-               var text, href;
+           return targetWay;
+         }
 
-               if (cap[2] === '@') {
-                 text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
-                 href = 'mailto:' + text;
-               } else {
-                 // do extended autolink path validation
-                 var prevCapZero;
+         function updateChildren(updates, graph) {
+           for (var i = 0; i < updates.replacements.length; i++) {
+             graph = graph.replace(updates.replacements[i]);
+           }
 
-                 do {
-                   prevCapZero = cap[0];
-                   cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
-                 } while (prevCapZero !== cap[0]);
+           if (updates.removeIds.length) {
+             graph = actionDeleteMultiple(updates.removeIds)(graph);
+           }
 
-                 text = _escape(cap[0]);
+           return graph;
+         }
 
-                 if (cap[1] === 'www.') {
-                   href = 'http://' + text;
-                 } else {
-                   href = text;
-                 }
-               }
+         function mergeMembers(remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.members, remote.members)) {
+             return target;
+           }
 
-               return {
-                 type: 'link',
-                 raw: cap[0],
-                 text: text,
-                 href: href,
-                 tokens: [{
-                   type: 'text',
-                   raw: text,
-                   text: text
-                 }]
-               };
+           if (_option === 'force_remote') {
+             return target.update({
+               members: remote.members
+             });
+           }
+
+           _conflicts.push(_t.html('merge_remote_changes.conflict.memberlist', {
+             user: {
+               html: user(remote.user)
              }
+           }));
+
+           return target;
+         }
+
+         function mergeTags(base, remote, target) {
+           if (_option === 'force_local' || fastDeepEqual(target.tags, remote.tags)) {
+             return target;
            }
-         }, {
-           key: "inlineText",
-           value: function inlineText(src, inRawBlock, smartypants) {
-             var cap = this.rules.inline.text.exec(src);
 
-             if (cap) {
-               var text;
+           if (_option === 'force_remote') {
+             return target.update({
+               tags: remote.tags
+             });
+           }
 
-               if (inRawBlock) {
-                 text = this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0];
+           var ccount = _conflicts.length;
+           var o = base.tags || {};
+           var a = target.tags || {};
+           var b = remote.tags || {};
+           var keys = utilArrayUnion(utilArrayUnion(Object.keys(o), Object.keys(a)), Object.keys(b)).filter(function (k) {
+             return !discardTags[k];
+           });
+           var tags = Object.assign({}, a); // shallow copy
+
+           var changed = false;
+
+           for (var i = 0; i < keys.length; i++) {
+             var k = keys[i];
+
+             if (o[k] !== b[k] && a[k] !== b[k]) {
+               // changed remotely..
+               if (o[k] !== a[k]) {
+                 // changed locally..
+                 _conflicts.push(_t.html('merge_remote_changes.conflict.tags', {
+                   tag: k,
+                   local: a[k],
+                   remote: b[k],
+                   user: {
+                     html: user(remote.user)
+                   }
+                 }));
                } else {
-                 text = _escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
-               }
+                 // unchanged locally, accept remote change..
+                 if (b.hasOwnProperty(k)) {
+                   tags[k] = b[k];
+                 } else {
+                   delete tags[k];
+                 }
 
-               return {
-                 type: 'text',
-                 raw: cap[0],
-                 text: text
-               };
+                 changed = true;
+               }
              }
            }
-         }]);
 
-         return Tokenizer;
-       }();
+           return changed && _conflicts.length === ccount ? target.update({
+             tags: tags
+           }) : target;
+         } //  `graph.base()` is the common ancestor of the two graphs.
+         //  `localGraph` contains user's edits up to saving
+         //  `remoteGraph` contains remote edits to modified nodes
+         //  `graph` must be a descendent of `localGraph` and may include
+         //      some conflict resolution actions performed on it.
+         //
+         //                  --- ... --- `localGraph` -- ... -- `graph`
+         //                 /
+         //  `graph.base()` --- ... --- `remoteGraph`
+         //
 
-       var noopTest$1 = helpers.noopTest,
-           edit$1 = helpers.edit,
-           merge$2 = helpers.merge;
-       /**
-        * Block-Level Grammar
-        */
 
-       var block = {
-         newline: /^\n+/,
-         code: /^( {4}[^\n]+\n*)+/,
-         fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
-         hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
-         heading: /^ {0,3}(#{1,6}) +([^\n]*?)(?: +#+)? *(?:\n+|$)/,
-         blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
-         list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?!\1bull )\n*|\s*$)/,
-         html: '^ {0,3}(?:' // optional indentation
-         + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
-         + '|comment[^\\n]*(\\n+|$)' // (2)
-         + '|<\\?[\\s\\S]*?(?:\\?>\\n*|$)' // (3)
-         + '|<![A-Z][\\s\\S]*?(?:>\\n*|$)' // (4)
-         + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>\\n*|$)' // (5)
-         + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:\\n{2,}|$)' // (6)
-         + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) open tag
-         + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:\\n{2,}|$)' // (7) closing tag
-         + ')',
-         def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
-         nptable: noopTest$1,
-         table: noopTest$1,
-         lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
-         // regex template, placeholders will be replaced according to different paragraph
-         // interruption rules of commonmark and the original markdown spec:
-         _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html)[^\n]+)*)/,
-         text: /^[^\n]+/
-       };
-       block._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
-       block._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
-       block.def = edit$1(block.def).replace('label', block._label).replace('title', block._title).getRegex();
-       block.bullet = /(?:[*+-]|\d{1,9}[.)])/;
-       block.item = /^( *)(bull) ?[^\n]*(?:\n(?!\1bull ?)[^\n]*)*/;
-       block.item = edit$1(block.item, 'gm').replace(/bull/g, block.bullet).getRegex();
-       block.list = edit$1(block.list).replace(/bull/g, block.bullet).replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))').replace('def', '\\n+(?=' + block.def.source + ')').getRegex();
-       block._tag = 'address|article|aside|base|basefont|blockquote|body|caption' + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' + '|track|ul';
-       block._comment = /<!--(?!-?>)[\s\S]*?(?:-->|$)/;
-       block.html = edit$1(block.html, 'i').replace('comment', block._comment).replace('tag', block._tag).replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/).getRegex();
-       block.paragraph = edit$1(block._paragraph).replace('hr', block.hr).replace('heading', ' {0,3}#{1,6} ').replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
-       .replace('blockquote', ' {0,3}>').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-       .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block._tag) // pars can be interrupted by type (6) html blocks
-       .getRegex();
-       block.blockquote = edit$1(block.blockquote).replace('paragraph', block.paragraph).getRegex();
-       /**
-        * Normal Block Grammar
-        */
+         var action = function action(graph) {
+           var updates = {
+             replacements: [],
+             removeIds: []
+           };
+           var base = graph.base().entities[id];
+           var local = localGraph.entity(id);
+           var remote = remoteGraph.entity(id);
+           var target = osmEntity(local, {
+             version: remote.version
+           }); // delete/undelete
 
-       block.normal = merge$2({}, block);
-       /**
-        * GFM Block Grammar
-        */
+           if (!remote.visible) {
+             if (_option === 'force_remote') {
+               return actionDeleteMultiple([id])(graph);
+             } else if (_option === 'force_local') {
+               if (target.type === 'way') {
+                 target = mergeChildren(target, utilArrayUniq(local.nodes), updates, graph);
+                 graph = updateChildren(updates, graph);
+               }
 
-       block.gfm = merge$2({}, block.normal, {
-         nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
-         + ' {0,3}([-:]+ *\\|[-| :]*)' // Align
-         + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)',
-         // Cells
-         table: '^ *\\|(.+)\\n' // Header
-         + ' {0,3}\\|?( *[-:]+[-| :]*)' // Align
-         + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
+               return graph.replace(target);
+             } else {
+               _conflicts.push(_t.html('merge_remote_changes.conflict.deleted', {
+                 user: {
+                   html: user(remote.user)
+                 }
+               }));
 
-       });
-       block.gfm.nptable = edit$1(block.gfm.nptable).replace('hr', block.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-       .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-       .getRegex();
-       block.gfm.table = edit$1(block.gfm.table).replace('hr', block.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
-       .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block._tag) // tables can be interrupted by type (6) html blocks
-       .getRegex();
-       /**
-        * Pedantic grammar (original John Gruber's loose markdown specification)
-        */
+               return graph; // do nothing
+             }
+           } // merge
 
-       block.pedantic = merge$2({}, block.normal, {
-         html: edit$1('^ *(?:comment *(?:\\n|\\s*$)' + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
-         + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))').replace('comment', block._comment).replace(/tag/g, '(?!(?:' + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b').getRegex(),
-         def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
-         heading: /^ *(#{1,6}) *([^\n]+?) *(?:#+ *)?(?:\n+|$)/,
-         fences: noopTest$1,
-         // fences not supported
-         paragraph: edit$1(block.normal._paragraph).replace('hr', block.hr).replace('heading', ' *#{1,6} *[^\n]').replace('lheading', block.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()
-       });
-       /**
-        * Inline-Level Grammar
-        */
 
-       var inline = {
-         escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
-         autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
-         url: noopTest$1,
-         tag: '^comment' + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
-         + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
-         + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
-         + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
-         + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>',
-         // CDATA section
-         link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
-         reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
-         nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
-         reflinkSearch: 'reflink|nolink(?!\\()',
-         strong: {
-           start: /^(?:(\*\*(?=[*punctuation]))|\*\*)(?![\s])|__/,
-           // (1) returns if starts w/ punctuation
-           middle: /^\*\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*\*$|^__(?![\s])((?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?)__$/,
-           endAst: /[^punctuation\s]\*\*(?!\*)|[punctuation]\*\*(?!\*)(?:(?=[punctuation_\s]|$))/,
-           // last char can't be punct, or final * must also be followed by punct (or endline)
-           endUnd: /[^\s]__(?!_)(?:(?=[punctuation*\s])|$)/ // last char can't be a space, and final _ must preceed punct or \s (or endline)
+           if (target.type === 'node') {
+             target = mergeLocation(remote, target);
+           } else if (target.type === 'way') {
+             // pull in any child nodes that may not be present locally..
+             graph.rebase(remoteGraph.childNodes(remote), [graph], false);
+             target = mergeNodes(base, remote, target);
+             target = mergeChildren(target, utilArrayUnion(local.nodes, remote.nodes), updates, graph);
+           } else if (target.type === 'relation') {
+             target = mergeMembers(remote, target);
+           }
 
-         },
-         em: {
-           start: /^(?:(\*(?=[punctuation]))|\*)(?![*\s])|_/,
-           // (1) returns if starts w/ punctuation
-           middle: /^\*(?:(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)|\*(?:(?!overlapSkip)(?:[^*]|\\\*)|overlapSkip)*?\*)+?\*$|^_(?![_\s])(?:(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)|_(?:(?!overlapSkip)(?:[^_]|\\_)|overlapSkip)*?_)+?_$/,
-           endAst: /[^punctuation\s]\*(?!\*)|[punctuation]\*(?!\*)(?:(?=[punctuation_\s]|$))/,
-           // last char can't be punct, or final * must also be followed by punct (or endline)
-           endUnd: /[^\s]_(?!_)(?:(?=[punctuation*\s])|$)/ // last char can't be a space, and final _ must preceed punct or \s (or endline)
+           target = mergeTags(base, remote, target);
 
-         },
-         code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
-         br: /^( {2,}|\\)\n(?!\s*$)/,
-         del: noopTest$1,
-         text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*]|\b_|$)|[^ ](?= {2,}\n)))/,
-         punctuation: /^([\s*punctuation])/
-       }; // list of punctuation marks from common mark spec
-       // without * and _ to workaround cases with double emphasis
-
-       inline._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
-       inline.punctuation = edit$1(inline.punctuation).replace(/punctuation/g, inline._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>
-
-       inline._blockSkip = '\\[[^\\]]*?\\]\\([^\\)]*?\\)|`[^`]*?`|<[^>]*?>';
-       inline._overlapSkip = '__[^_]*?__|\\*\\*\\[^\\*\\]*?\\*\\*';
-       inline._comment = edit$1(block._comment).replace('(?:-->|$)', '-->').getRegex();
-       inline.em.start = edit$1(inline.em.start).replace(/punctuation/g, inline._punctuation).getRegex();
-       inline.em.middle = edit$1(inline.em.middle).replace(/punctuation/g, inline._punctuation).replace(/overlapSkip/g, inline._overlapSkip).getRegex();
-       inline.em.endAst = edit$1(inline.em.endAst, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
-       inline.em.endUnd = edit$1(inline.em.endUnd, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
-       inline.strong.start = edit$1(inline.strong.start).replace(/punctuation/g, inline._punctuation).getRegex();
-       inline.strong.middle = edit$1(inline.strong.middle).replace(/punctuation/g, inline._punctuation).replace(/overlapSkip/g, inline._overlapSkip).getRegex();
-       inline.strong.endAst = edit$1(inline.strong.endAst, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
-       inline.strong.endUnd = edit$1(inline.strong.endUnd, 'g').replace(/punctuation/g, inline._punctuation).getRegex();
-       inline.blockSkip = edit$1(inline._blockSkip, 'g').getRegex();
-       inline.overlapSkip = edit$1(inline._overlapSkip, 'g').getRegex();
-       inline._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
-       inline._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
-       inline._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
-       inline.autolink = edit$1(inline.autolink).replace('scheme', inline._scheme).replace('email', inline._email).getRegex();
-       inline._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
-       inline.tag = edit$1(inline.tag).replace('comment', inline._comment).replace('attribute', inline._attribute).getRegex();
-       inline._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
-       inline._href = /<(?:\\[<>]?|[^\s<>\\])*>|[^\s\x00-\x1f]*/;
-       inline._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
-       inline.link = edit$1(inline.link).replace('label', inline._label).replace('href', inline._href).replace('title', inline._title).getRegex();
-       inline.reflink = edit$1(inline.reflink).replace('label', inline._label).getRegex();
-       inline.reflinkSearch = edit$1(inline.reflinkSearch, 'g').replace('reflink', inline.reflink).replace('nolink', inline.nolink).getRegex();
-       /**
-        * Normal Inline Grammar
-        */
+           if (!_conflicts.length) {
+             graph = updateChildren(updates, graph).replace(target);
+           }
 
-       inline.normal = merge$2({}, inline);
-       /**
-        * Pedantic Inline Grammar
-        */
+           return graph;
+         };
 
-       inline.pedantic = merge$2({}, inline.normal, {
-         strong: {
-           start: /^__|\*\*/,
-           middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
-           endAst: /\*\*(?!\*)/g,
-           endUnd: /__(?!_)/g
-         },
-         em: {
-           start: /^_|\*/,
-           middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
-           endAst: /\*(?!\*)/g,
-           endUnd: /_(?!_)/g
-         },
-         link: edit$1(/^!?\[(label)\]\((.*?)\)/).replace('label', inline._label).getRegex(),
-         reflink: edit$1(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace('label', inline._label).getRegex()
-       });
-       /**
-        * GFM Inline Grammar
-        */
+         action.withOption = function (opt) {
+           _option = opt;
+           return action;
+         };
 
-       inline.gfm = merge$2({}, inline.normal, {
-         escape: edit$1(inline.escape).replace('])', '~|])').getRegex(),
-         _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
-         url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
-         _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
-         del: /^~+(?=\S)([\s\S]*?\S)~+/,
-         text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*~]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@))/
-       });
-       inline.gfm.url = edit$1(inline.gfm.url, 'i').replace('email', inline.gfm._extended_email).getRegex();
-       /**
-        * GFM + Line Breaks Inline Grammar
-        */
+         action.conflicts = function () {
+           return _conflicts;
+         };
 
-       inline.breaks = merge$2({}, inline.gfm, {
-         br: edit$1(inline.br).replace('{2,}', '*').getRegex(),
-         text: edit$1(inline.gfm.text).replace('\\b_', '\\b_| {2,}\\n').replace(/\{2,\}/g, '*').getRegex()
-       });
-       var rules = {
-         block: block,
-         inline: inline
-       };
+         return action;
+       }
 
-       var defaults$2 = defaults.defaults;
-       var block$1 = rules.block,
-           inline$1 = rules.inline;
-       var repeatString$1 = helpers.repeatString;
-       /**
-        * smartypants text replacement
-        */
+       // https://github.com/openstreetmap/potlatch2/blob/master/net/systemeD/halcyon/connection/actions/MoveNodeAction.as
 
-       function smartypants(text) {
-         return text // em-dashes
-         .replace(/---/g, "\u2014") // en-dashes
-         .replace(/--/g, "\u2013") // opening singles
-         .replace(/(^|[-\u2014/(\[{"\s])'/g, "$1\u2018") // closing singles & apostrophes
-         .replace(/'/g, "\u2019") // opening doubles
-         .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, "$1\u201C") // closing doubles
-         .replace(/"/g, "\u201D") // ellipses
-         .replace(/\.{3}/g, "\u2026");
-       }
-       /**
-        * mangle email addresses
-        */
+       function actionMove(moveIDs, tryDelta, projection, cache) {
+         var _delta = tryDelta;
 
+         function setupCache(graph) {
+           function canMove(nodeID) {
+             // Allow movement of any node that is in the selectedIDs list..
+             if (moveIDs.indexOf(nodeID) !== -1) return true; // Allow movement of a vertex where 2 ways meet..
 
-       function mangle(text) {
-         var out = '',
-             i,
-             ch;
-         var l = text.length;
+             var parents = graph.parentWays(graph.entity(nodeID));
+             if (parents.length < 3) return true; // Restrict movement of a vertex where >2 ways meet, unless all parentWays are moving too..
 
-         for (i = 0; i < l; i++) {
-           ch = text.charCodeAt(i);
+             var parentsMoving = parents.every(function (way) {
+               return cache.moving[way.id];
+             });
+             if (!parentsMoving) delete cache.moving[nodeID];
+             return parentsMoving;
+           }
 
-           if (Math.random() > 0.5) {
-             ch = 'x' + ch.toString(16);
+           function cacheEntities(ids) {
+             for (var i = 0; i < ids.length; i++) {
+               var id = ids[i];
+               if (cache.moving[id]) continue;
+               cache.moving[id] = true;
+               var entity = graph.hasEntity(id);
+               if (!entity) continue;
+
+               if (entity.type === 'node') {
+                 cache.nodes.push(id);
+                 cache.startLoc[id] = entity.loc;
+               } else if (entity.type === 'way') {
+                 cache.ways.push(id);
+                 cacheEntities(entity.nodes);
+               } else {
+                 cacheEntities(entity.members.map(function (member) {
+                   return member.id;
+                 }));
+               }
+             }
            }
 
-           out += '&#' + ch + ';';
-         }
+           function cacheIntersections(ids) {
+             function isEndpoint(way, id) {
+               return !way.isClosed() && !!way.affix(id);
+             }
 
-         return out;
-       }
-       /**
-        * Block Lexer
-        */
+             for (var i = 0; i < ids.length; i++) {
+               var id = ids[i]; // consider only intersections with 1 moved and 1 unmoved way.
 
+               var childNodes = graph.childNodes(graph.entity(id));
 
-       var Lexer_1 = /*#__PURE__*/function () {
-         function Lexer(options) {
-           _classCallCheck(this, Lexer);
+               for (var j = 0; j < childNodes.length; j++) {
+                 var node = childNodes[j];
+                 var parents = graph.parentWays(node);
+                 if (parents.length !== 2) continue;
+                 var moved = graph.entity(id);
+                 var unmoved = null;
 
-           this.tokens = [];
-           this.tokens.links = Object.create(null);
-           this.options = options || defaults$2;
-           this.options.tokenizer = this.options.tokenizer || new Tokenizer_1();
-           this.tokenizer = this.options.tokenizer;
-           this.tokenizer.options = this.options;
-           var rules = {
-             block: block$1.normal,
-             inline: inline$1.normal
-           };
+                 for (var k = 0; k < parents.length; k++) {
+                   var way = parents[k];
 
-           if (this.options.pedantic) {
-             rules.block = block$1.pedantic;
-             rules.inline = inline$1.pedantic;
-           } else if (this.options.gfm) {
-             rules.block = block$1.gfm;
+                   if (!cache.moving[way.id]) {
+                     unmoved = way;
+                     break;
+                   }
+                 }
 
-             if (this.options.breaks) {
-               rules.inline = inline$1.breaks;
-             } else {
-               rules.inline = inline$1.gfm;
+                 if (!unmoved) continue; // exclude ways that are overly connected..
+
+                 if (utilArrayIntersection(moved.nodes, unmoved.nodes).length > 2) continue;
+                 if (moved.isArea() || unmoved.isArea()) continue;
+                 cache.intersections.push({
+                   nodeId: node.id,
+                   movedId: moved.id,
+                   unmovedId: unmoved.id,
+                   movedIsEP: isEndpoint(moved, node.id),
+                   unmovedIsEP: isEndpoint(unmoved, node.id)
+                 });
+               }
              }
            }
 
-           this.tokenizer.rules = rules;
-         }
-         /**
-          * Expose Rules
-          */
+           if (!cache) {
+             cache = {};
+           }
+
+           if (!cache.ok) {
+             cache.moving = {};
+             cache.intersections = [];
+             cache.replacedVertex = {};
+             cache.startLoc = {};
+             cache.nodes = [];
+             cache.ways = [];
+             cacheEntities(moveIDs);
+             cacheIntersections(cache.ways);
+             cache.nodes = cache.nodes.filter(canMove);
+             cache.ok = true;
+           }
+         } // Place a vertex where the moved vertex used to be, to preserve way shape..
+         //
+         //  Start:
+         //      b ---- e
+         //     / \
+         //    /   \
+         //   /     \
+         //  a       c
+         //
+         //      *               node '*' added to preserve shape
+         //     / \
+         //    /   b ---- e      way `b,e` moved here:
+         //   /     \
+         //  a       c
+         //
+         //
 
 
-         _createClass(Lexer, [{
-           key: "lex",
+         function replaceMovedVertex(nodeId, wayId, graph, delta) {
+           var way = graph.entity(wayId);
+           var moved = graph.entity(nodeId);
+           var movedIndex = way.nodes.indexOf(nodeId);
+           var len, prevIndex, nextIndex;
 
-           /**
-            * Preprocessing
-            */
-           value: function lex(src) {
-             src = src.replace(/\r\n|\r/g, '\n').replace(/\t/g, '    ');
-             this.blockTokens(src, this.tokens, true);
-             this.inline(this.tokens);
-             return this.tokens;
+           if (way.isClosed()) {
+             len = way.nodes.length - 1;
+             prevIndex = (movedIndex + len - 1) % len;
+             nextIndex = (movedIndex + len + 1) % len;
+           } else {
+             len = way.nodes.length;
+             prevIndex = movedIndex - 1;
+             nextIndex = movedIndex + 1;
            }
-           /**
-            * Lexing
-            */
 
-         }, {
-           key: "blockTokens",
-           value: function blockTokens(src) {
-             var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
-             var top = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;
-             src = src.replace(/^ +$/gm, '');
-             var token, i, l, lastToken;
+           var prev = graph.hasEntity(way.nodes[prevIndex]);
+           var next = graph.hasEntity(way.nodes[nextIndex]); // Don't add orig vertex at endpoint..
 
-             while (src) {
-               // newline
-               if (token = this.tokenizer.space(src)) {
-                 src = src.substring(token.raw.length);
+           if (!prev || !next) return graph;
+           var key = wayId + '_' + nodeId;
+           var orig = cache.replacedVertex[key];
 
-                 if (token.type) {
-                   tokens.push(token);
-                 }
+           if (!orig) {
+             orig = osmNode();
+             cache.replacedVertex[key] = orig;
+             cache.startLoc[orig.id] = cache.startLoc[nodeId];
+           }
+
+           var start, end;
+
+           if (delta) {
+             start = projection(cache.startLoc[nodeId]);
+             end = projection.invert(geoVecAdd(start, delta));
+           } else {
+             end = cache.startLoc[nodeId];
+           }
 
-                 continue;
-               } // code
+           orig = orig.move(end);
+           var angle = Math.abs(geoAngle(orig, prev, projection) - geoAngle(orig, next, projection)) * 180 / Math.PI; // Don't add orig vertex if it would just make a straight line..
 
+           if (angle > 175 && angle < 185) return graph; // moving forward or backward along way?
 
-               if (token = this.tokenizer.code(src, tokens)) {
-                 src = src.substring(token.raw.length);
+           var p1 = [prev.loc, orig.loc, moved.loc, next.loc].map(projection);
+           var p2 = [prev.loc, moved.loc, orig.loc, next.loc].map(projection);
+           var d1 = geoPathLength(p1);
+           var d2 = geoPathLength(p2);
+           var insertAt = d1 <= d2 ? movedIndex : nextIndex; // moving around closed loop?
 
-                 if (token.type) {
-                   tokens.push(token);
-                 } else {
-                   lastToken = tokens[tokens.length - 1];
-                   lastToken.raw += '\n' + token.raw;
-                   lastToken.text += '\n' + token.text;
-                 }
+           if (way.isClosed() && insertAt === 0) insertAt = len;
+           way = way.addNode(orig.id, insertAt);
+           return graph.replace(orig).replace(way);
+         } // Remove duplicate vertex that might have been added by
+         // replaceMovedVertex.  This is done after the unzorro checks.
 
-                 continue;
-               } // fences
 
+         function removeDuplicateVertices(wayId, graph) {
+           var way = graph.entity(wayId);
+           var epsilon = 1e-6;
+           var prev, curr;
 
-               if (token = this.tokenizer.fences(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // heading
+           function isInteresting(node, graph) {
+             return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+           }
 
+           for (var i = 0; i < way.nodes.length; i++) {
+             curr = graph.entity(way.nodes[i]);
 
-               if (token = this.tokenizer.heading(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // table no leading pipe (gfm)
+             if (prev && curr && geoVecEqual(prev.loc, curr.loc, epsilon)) {
+               if (!isInteresting(prev, graph)) {
+                 way = way.removeNode(prev.id);
+                 graph = graph.replace(way).remove(prev);
+               } else if (!isInteresting(curr, graph)) {
+                 way = way.removeNode(curr.id);
+                 graph = graph.replace(way).remove(curr);
+               }
+             }
 
+             prev = curr;
+           }
 
-               if (token = this.tokenizer.nptable(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // hr
+           return graph;
+         } // Reorder nodes around intersections that have moved..
+         //
+         //  Start:                way1.nodes: b,e         (moving)
+         //  a - b - c ----- d     way2.nodes: a,b,c,d     (static)
+         //      |                 vertex: b
+         //      e                 isEP1: true,  isEP2, false
+         //
+         //  way1 `b,e` moved here:
+         //  a ----- c = b - d
+         //              |
+         //              e
+         //
+         //  reorder nodes         way1.nodes: b,e
+         //  a ----- c - b - d     way2.nodes: a,c,b,d
+         //              |
+         //              e
+         //
 
 
-               if (token = this.tokenizer.hr(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // blockquote
+         function unZorroIntersection(intersection, graph) {
+           var vertex = graph.entity(intersection.nodeId);
+           var way1 = graph.entity(intersection.movedId);
+           var way2 = graph.entity(intersection.unmovedId);
+           var isEP1 = intersection.movedIsEP;
+           var isEP2 = intersection.unmovedIsEP; // don't move the vertex if it is the endpoint of both ways.
 
+           if (isEP1 && isEP2) return graph;
+           var nodes1 = graph.childNodes(way1).filter(function (n) {
+             return n !== vertex;
+           });
+           var nodes2 = graph.childNodes(way2).filter(function (n) {
+             return n !== vertex;
+           });
+           if (way1.isClosed() && way1.first() === vertex.id) nodes1.push(nodes1[0]);
+           if (way2.isClosed() && way2.first() === vertex.id) nodes2.push(nodes2[0]);
+           var edge1 = !isEP1 && geoChooseEdge(nodes1, projection(vertex.loc), projection);
+           var edge2 = !isEP2 && geoChooseEdge(nodes2, projection(vertex.loc), projection);
+           var loc; // snap vertex to nearest edge (or some point between them)..
 
-               if (token = this.tokenizer.blockquote(src)) {
-                 src = src.substring(token.raw.length);
-                 token.tokens = this.blockTokens(token.text, [], top);
-                 tokens.push(token);
-                 continue;
-               } // list
+           if (!isEP1 && !isEP2) {
+             var epsilon = 1e-6,
+                 maxIter = 10;
 
+             for (var i = 0; i < maxIter; i++) {
+               loc = geoVecInterp(edge1.loc, edge2.loc, 0.5);
+               edge1 = geoChooseEdge(nodes1, projection(loc), projection);
+               edge2 = geoChooseEdge(nodes2, projection(loc), projection);
+               if (Math.abs(edge1.distance - edge2.distance) < epsilon) break;
+             }
+           } else if (!isEP1) {
+             loc = edge1.loc;
+           } else {
+             loc = edge2.loc;
+           }
 
-               if (token = this.tokenizer.list(src)) {
-                 src = src.substring(token.raw.length);
-                 l = token.items.length;
+           graph = graph.replace(vertex.move(loc)); // if zorro happened, reorder nodes..
 
-                 for (i = 0; i < l; i++) {
-                   token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
-                 }
+           if (!isEP1 && edge1.index !== way1.nodes.indexOf(vertex.id)) {
+             way1 = way1.removeNode(vertex.id).addNode(vertex.id, edge1.index);
+             graph = graph.replace(way1);
+           }
 
-                 tokens.push(token);
-                 continue;
-               } // html
+           if (!isEP2 && edge2.index !== way2.nodes.indexOf(vertex.id)) {
+             way2 = way2.removeNode(vertex.id).addNode(vertex.id, edge2.index);
+             graph = graph.replace(way2);
+           }
 
+           return graph;
+         }
 
-               if (token = this.tokenizer.html(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // def
+         function cleanupIntersections(graph) {
+           for (var i = 0; i < cache.intersections.length; i++) {
+             var obj = cache.intersections[i];
+             graph = replaceMovedVertex(obj.nodeId, obj.movedId, graph, _delta);
+             graph = replaceMovedVertex(obj.nodeId, obj.unmovedId, graph, null);
+             graph = unZorroIntersection(obj, graph);
+             graph = removeDuplicateVertices(obj.movedId, graph);
+             graph = removeDuplicateVertices(obj.unmovedId, graph);
+           }
 
+           return graph;
+         } // check if moving way endpoint can cross an unmoved way, if so limit delta..
 
-               if (top && (token = this.tokenizer.def(src))) {
-                 src = src.substring(token.raw.length);
 
-                 if (!this.tokens.links[token.tag]) {
-                   this.tokens.links[token.tag] = {
-                     href: token.href,
-                     title: token.title
-                   };
-                 }
+         function limitDelta(graph) {
+           function moveNode(loc) {
+             return geoVecAdd(projection(loc), _delta);
+           }
 
-                 continue;
-               } // table (gfm)
+           for (var i = 0; i < cache.intersections.length; i++) {
+             var obj = cache.intersections[i]; // Don't limit movement if this is vertex joins 2 endpoints..
 
+             if (obj.movedIsEP && obj.unmovedIsEP) continue; // Don't limit movement if this vertex is not an endpoint anyway..
 
-               if (token = this.tokenizer.table(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // lheading
+             if (!obj.movedIsEP) continue;
+             var node = graph.entity(obj.nodeId);
+             var start = projection(node.loc);
+             var end = geoVecAdd(start, _delta);
+             var movedNodes = graph.childNodes(graph.entity(obj.movedId));
+             var movedPath = movedNodes.map(function (n) {
+               return moveNode(n.loc);
+             });
+             var unmovedNodes = graph.childNodes(graph.entity(obj.unmovedId));
+             var unmovedPath = unmovedNodes.map(function (n) {
+               return projection(n.loc);
+             });
+             var hits = geoPathIntersections(movedPath, unmovedPath);
 
+             for (var j = 0; i < hits.length; i++) {
+               if (geoVecEqual(hits[j], end)) continue;
+               var edge = geoChooseEdge(unmovedNodes, end, projection);
+               _delta = geoVecSubtract(projection(edge.loc), start);
+             }
+           }
+         }
 
-               if (token = this.tokenizer.lheading(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // top-level paragraph
+         var action = function action(graph) {
+           if (_delta[0] === 0 && _delta[1] === 0) return graph;
+           setupCache(graph);
 
+           if (cache.intersections.length) {
+             limitDelta(graph);
+           }
 
-               if (top && (token = this.tokenizer.paragraph(src))) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // text
+           for (var i = 0; i < cache.nodes.length; i++) {
+             var node = graph.entity(cache.nodes[i]);
+             var start = projection(node.loc);
+             var end = geoVecAdd(start, _delta);
+             graph = graph.replace(node.move(projection.invert(end)));
+           }
 
+           if (cache.intersections.length) {
+             graph = cleanupIntersections(graph);
+           }
 
-               if (token = this.tokenizer.text(src, tokens)) {
-                 src = src.substring(token.raw.length);
+           return graph;
+         };
 
-                 if (token.type) {
-                   tokens.push(token);
-                 } else {
-                   lastToken = tokens[tokens.length - 1];
-                   lastToken.raw += '\n' + token.raw;
-                   lastToken.text += '\n' + token.text;
-                 }
+         action.delta = function () {
+           return _delta;
+         };
 
-                 continue;
-               }
+         return action;
+       }
 
-               if (src) {
-                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+       function actionMoveMember(relationId, fromIndex, toIndex) {
+         return function (graph) {
+           return graph.replace(graph.entity(relationId).moveMember(fromIndex, toIndex));
+         };
+       }
 
-                 if (this.options.silent) {
-                   console.error(errMsg);
-                   break;
-                 } else {
-                   throw new Error(errMsg);
-                 }
-               }
-             }
+       function actionMoveNode(nodeID, toLoc) {
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var node = graph.entity(nodeID);
+           return graph.replace(node.move(geoVecInterp(node.loc, toLoc, t)));
+         };
 
-             return tokens;
-           }
-         }, {
-           key: "inline",
-           value: function inline(tokens) {
-             var i, j, k, l2, row, token;
-             var l = tokens.length;
+         action.transitionable = true;
+         return action;
+       }
 
-             for (i = 0; i < l; i++) {
-               token = tokens[i];
+       function actionNoop() {
+         return function (graph) {
+           return graph;
+         };
+       }
 
-               switch (token.type) {
-                 case 'paragraph':
-                 case 'text':
-                 case 'heading':
-                   {
-                     token.tokens = [];
-                     this.inlineTokens(token.text, token.tokens);
-                     break;
-                   }
+       function actionOrthogonalize(wayID, projection, vertexID, degThresh, ep) {
+         var epsilon = ep || 1e-4;
+         var threshold = degThresh || 13; // degrees within right or straight to alter
+         // We test normalized dot products so we can compare as cos(angle)
 
-                 case 'table':
-                   {
-                     token.tokens = {
-                       header: [],
-                       cells: []
-                     }; // header
+         var lowerThreshold = Math.cos((90 - threshold) * Math.PI / 180);
+         var upperThreshold = Math.cos(threshold * Math.PI / 180);
 
-                     l2 = token.header.length;
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var way = graph.entity(wayID);
+           way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-                     for (j = 0; j < l2; j++) {
-                       token.tokens.header[j] = [];
-                       this.inlineTokens(token.header[j], token.tokens.header[j]);
-                     } // cells
+           if (way.tags.nonsquare) {
+             var tags = Object.assign({}, way.tags); // since we're squaring, remove indication that this is physically unsquare
 
+             delete tags.nonsquare;
+             way = way.update({
+               tags: tags
+             });
+           }
 
-                     l2 = token.cells.length;
+           graph = graph.replace(way);
+           var isClosed = way.isClosed();
+           var nodes = graph.childNodes(way).slice(); // shallow copy
 
-                     for (j = 0; j < l2; j++) {
-                       row = token.cells[j];
-                       token.tokens.cells[j] = [];
+           if (isClosed) nodes.pop();
 
-                       for (k = 0; k < row.length; k++) {
-                         token.tokens.cells[j][k] = [];
-                         this.inlineTokens(row[k], token.tokens.cells[j][k]);
-                       }
-                     }
+           if (vertexID !== undefined) {
+             nodes = nodeSubset(nodes, vertexID, isClosed);
+             if (nodes.length !== 3) return graph;
+           } // note: all geometry functions here use the unclosed node/point/coord list
 
-                     break;
-                   }
 
-                 case 'blockquote':
-                   {
-                     this.inline(token.tokens);
-                     break;
-                   }
+           var nodeCount = {};
+           var points = [];
+           var corner = {
+             i: 0,
+             dotp: 1
+           };
+           var node, point, loc, score, motions, i, j;
 
-                 case 'list':
-                   {
-                     l2 = token.items.length;
+           for (i = 0; i < nodes.length; i++) {
+             node = nodes[i];
+             nodeCount[node.id] = (nodeCount[node.id] || 0) + 1;
+             points.push({
+               id: node.id,
+               coord: projection(node.loc)
+             });
+           }
 
-                     for (j = 0; j < l2; j++) {
-                       this.inline(token.items[j].tokens);
-                     }
+           if (points.length === 3) {
+             // move only one vertex for right triangle
+             for (i = 0; i < 1000; i++) {
+               motions = points.map(calcMotion);
+               points[corner.i].coord = geoVecAdd(points[corner.i].coord, motions[corner.i]);
+               score = corner.dotp;
 
-                     break;
-                   }
+               if (score < epsilon) {
+                 break;
                }
              }
 
-             return tokens;
-           }
-           /**
-            * Lexing/Compiling
-            */
+             node = graph.entity(nodes[corner.i].id);
+             loc = projection.invert(points[corner.i].coord);
+             graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+           } else {
+             var straights = [];
+             var simplified = []; // Remove points from nearly straight sections..
+             // This produces a simplified shape to orthogonalize
 
-         }, {
-           key: "inlineTokens",
-           value: function inlineTokens(src) {
-             var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
-             var inLink = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
-             var inRawBlock = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
-             var prevChar = arguments.length > 4 && arguments[4] !== undefined ? arguments[4] : '';
-             var token; // String with links masked to avoid interference with em and strong
+             for (i = 0; i < points.length; i++) {
+               point = points[i];
+               var dotp = 0;
 
-             var maskedSrc = src;
-             var match; // Mask out reflinks
+               if (isClosed || i > 0 && i < points.length - 1) {
+                 var a = points[(i - 1 + points.length) % points.length];
+                 var b = points[(i + 1) % points.length];
+                 dotp = Math.abs(geoOrthoNormalizedDotProduct(a.coord, b.coord, point.coord));
+               }
 
-             if (this.tokens.links) {
-               var links = Object.keys(this.tokens.links);
+               if (dotp > upperThreshold) {
+                 straights.push(point);
+               } else {
+                 simplified.push(point);
+               }
+             } // Orthogonalize the simplified shape
 
-               if (links.length > 0) {
-                 while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
-                   if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
-                     maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString$1('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
-                   }
-                 }
+
+             var bestPoints = clonePoints(simplified);
+             var originalPoints = clonePoints(simplified);
+             score = Infinity;
+
+             for (i = 0; i < 1000; i++) {
+               motions = simplified.map(calcMotion);
+
+               for (j = 0; j < motions.length; j++) {
+                 simplified[j].coord = geoVecAdd(simplified[j].coord, motions[j]);
                }
-             } // Mask out other blocks
 
+               var newScore = geoOrthoCalcScore(simplified, isClosed, epsilon, threshold);
 
-             while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
-               maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString$1('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+               if (newScore < score) {
+                 bestPoints = clonePoints(simplified);
+                 score = newScore;
+               }
+
+               if (score < epsilon) {
+                 break;
+               }
              }
 
-             while (src) {
-               // escape
-               if (token = this.tokenizer.escape(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // tag
+             var bestCoords = bestPoints.map(function (p) {
+               return p.coord;
+             });
+             if (isClosed) bestCoords.push(bestCoords[0]); // move the nodes that should move
 
+             for (i = 0; i < bestPoints.length; i++) {
+               point = bestPoints[i];
 
-               if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
-                 src = src.substring(token.raw.length);
-                 inLink = token.inLink;
-                 inRawBlock = token.inRawBlock;
-                 tokens.push(token);
-                 continue;
-               } // link
+               if (!geoVecEqual(originalPoints[i].coord, point.coord)) {
+                 node = graph.entity(point.id);
+                 loc = projection.invert(point.coord);
+                 graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
+               }
+             } // move the nodes along straight segments
 
 
-               if (token = this.tokenizer.link(src)) {
-                 src = src.substring(token.raw.length);
+             for (i = 0; i < straights.length; i++) {
+               point = straights[i];
+               if (nodeCount[point.id] > 1) continue; // skip self-intersections
 
-                 if (token.type === 'link') {
-                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+               node = graph.entity(point.id);
+
+               if (t === 1 && graph.parentWays(node).length === 1 && graph.parentRelations(node).length === 0 && !node.hasInterestingTags()) {
+                 // remove uninteresting points..
+                 graph = actionDeleteNode(node.id)(graph);
+               } else {
+                 // move interesting points to the nearest edge..
+                 var choice = geoVecProject(point.coord, bestCoords);
+
+                 if (choice) {
+                   loc = projection.invert(choice.target);
+                   graph = graph.replace(node.move(geoVecInterp(node.loc, loc, t)));
                  }
+               }
+             }
+           }
 
-                 tokens.push(token);
-                 continue;
-               } // reflink, nolink
+           return graph;
 
+           function clonePoints(array) {
+             return array.map(function (p) {
+               return {
+                 id: p.id,
+                 coord: [p.coord[0], p.coord[1]]
+               };
+             });
+           }
 
-               if (token = this.tokenizer.reflink(src, this.tokens.links)) {
-                 src = src.substring(token.raw.length);
+           function calcMotion(point, i, array) {
+             // don't try to move the endpoints of a non-closed way.
+             if (!isClosed && (i === 0 || i === array.length - 1)) return [0, 0]; // don't try to move a node that appears more than once (self intersection)
 
-                 if (token.type === 'link') {
-                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
-                 }
+             if (nodeCount[array[i].id] > 1) return [0, 0];
+             var a = array[(i - 1 + array.length) % array.length].coord;
+             var origin = point.coord;
+             var b = array[(i + 1) % array.length].coord;
+             var p = geoVecSubtract(a, origin);
+             var q = geoVecSubtract(b, origin);
+             var scale = 2 * Math.min(geoVecLength(p), geoVecLength(q));
+             p = geoVecNormalize(p);
+             q = geoVecNormalize(q);
+             var dotp = p[0] * q[0] + p[1] * q[1];
+             var val = Math.abs(dotp);
+
+             if (val < lowerThreshold) {
+               // nearly orthogonal
+               corner.i = i;
+               corner.dotp = val;
+               var vec = geoVecNormalize(geoVecAdd(p, q));
+               return geoVecScale(vec, 0.1 * dotp * scale);
+             }
 
-                 tokens.push(token);
-                 continue;
-               } // strong
+             return [0, 0]; // do nothing
+           }
+         }; // if we are only orthogonalizing one vertex,
+         // get that vertex and the previous and next
 
 
-               if (token = this.tokenizer.strong(src, maskedSrc, prevChar)) {
-                 src = src.substring(token.raw.length);
-                 token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-                 tokens.push(token);
-                 continue;
-               } // em
+         function nodeSubset(nodes, vertexID, isClosed) {
+           var first = isClosed ? 0 : 1;
+           var last = isClosed ? nodes.length : nodes.length - 1;
 
+           for (var i = first; i < last; i++) {
+             if (nodes[i].id === vertexID) {
+               return [nodes[(i - 1 + nodes.length) % nodes.length], nodes[i], nodes[(i + 1) % nodes.length]];
+             }
+           }
 
-               if (token = this.tokenizer.em(src, maskedSrc, prevChar)) {
-                 src = src.substring(token.raw.length);
-                 token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-                 tokens.push(token);
-                 continue;
-               } // code
+           return [];
+         }
 
+         action.disabled = function (graph) {
+           var way = graph.entity(wayID);
+           way = way.removeNode(''); // sanity check - remove any consecutive duplicates
 
-               if (token = this.tokenizer.codespan(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // br
+           graph = graph.replace(way);
+           var isClosed = way.isClosed();
+           var nodes = graph.childNodes(way).slice(); // shallow copy
 
+           if (isClosed) nodes.pop();
+           var allowStraightAngles = false;
 
-               if (token = this.tokenizer.br(src)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // del (gfm)
+           if (vertexID !== undefined) {
+             allowStraightAngles = true;
+             nodes = nodeSubset(nodes, vertexID, isClosed);
+             if (nodes.length !== 3) return 'end_vertex';
+           }
 
+           var coords = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var score = geoOrthoCanOrthogonalize(coords, isClosed, epsilon, threshold, allowStraightAngles);
 
-               if (token = this.tokenizer.del(src)) {
-                 src = src.substring(token.raw.length);
-                 token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
-                 tokens.push(token);
-                 continue;
-               } // autolink
+           if (score === null) {
+             return 'not_squarish';
+           } else if (score === 0) {
+             return 'square_enough';
+           } else {
+             return false;
+           }
+         };
 
+         action.transitionable = true;
+         return action;
+       }
 
-               if (token = this.tokenizer.autolink(src, mangle)) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // url (gfm)
+       //
+       // `turn` must be an `osmTurn` object
+       // see osm/intersection.js, pathToTurn()
+       //
+       // This specifies a restriction of type `restriction` when traveling from
+       // `turn.from.way` toward `turn.to.way` via `turn.via.node` OR `turn.via.ways`.
+       // (The action does not check that these entities form a valid intersection.)
+       //
+       // From, to, and via ways should be split before calling this action.
+       // (old versions of the code would split the ways here, but we no longer do it)
+       //
+       // For testing convenience, accepts a restrictionID to assign to the new
+       // relation. Normally, this will be undefined and the relation will
+       // automatically be assigned a new ID.
+       //
 
+       function actionRestrictTurn(turn, restrictionType, restrictionID) {
+         return function (graph) {
+           var fromWay = graph.entity(turn.from.way);
+           var toWay = graph.entity(turn.to.way);
+           var viaNode = turn.via.node && graph.entity(turn.via.node);
+           var viaWays = turn.via.ways && turn.via.ways.map(function (id) {
+             return graph.entity(id);
+           });
+           var members = [];
+           members.push({
+             id: fromWay.id,
+             type: 'way',
+             role: 'from'
+           });
 
-               if (!inLink && (token = this.tokenizer.url(src, mangle))) {
-                 src = src.substring(token.raw.length);
-                 tokens.push(token);
-                 continue;
-               } // text
+           if (viaNode) {
+             members.push({
+               id: viaNode.id,
+               type: 'node',
+               role: 'via'
+             });
+           } else if (viaWays) {
+             viaWays.forEach(function (viaWay) {
+               members.push({
+                 id: viaWay.id,
+                 type: 'way',
+                 role: 'via'
+               });
+             });
+           }
 
+           members.push({
+             id: toWay.id,
+             type: 'way',
+             role: 'to'
+           });
+           return graph.replace(osmRelation({
+             id: restrictionID,
+             tags: {
+               type: 'restriction',
+               restriction: restrictionType
+             },
+             members: members
+           }));
+         };
+       }
 
-               if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
-                 src = src.substring(token.raw.length);
-                 prevChar = token.raw.slice(-1);
-                 tokens.push(token);
-                 continue;
-               }
+       function actionRevert(id) {
+         var action = function action(graph) {
+           var entity = graph.hasEntity(id),
+               base = graph.base().entities[id];
 
-               if (src) {
-                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+           if (entity && !base) {
+             // entity will be removed..
+             if (entity.type === 'node') {
+               graph.parentWays(entity).forEach(function (parent) {
+                 parent = parent.removeNode(id);
+                 graph = graph.replace(parent);
 
-                 if (this.options.silent) {
-                   console.error(errMsg);
-                   break;
-                 } else {
-                   throw new Error(errMsg);
+                 if (parent.isDegenerate()) {
+                   graph = actionDeleteWay(parent.id)(graph);
                  }
-               }
+               });
              }
 
-             return tokens;
-           }
-         }], [{
-           key: "lex",
+             graph.parentRelations(entity).forEach(function (parent) {
+               parent = parent.removeMembersWithID(id);
+               graph = graph.replace(parent);
 
-           /**
-            * Static Lex Method
-            */
-           value: function lex(src, options) {
-             var lexer = new Lexer(options);
-             return lexer.lex(src);
+               if (parent.isDegenerate()) {
+                 graph = actionDeleteRelation(parent.id)(graph);
+               }
+             });
            }
-           /**
-            * Static Lex Inline Method
-            */
 
-         }, {
-           key: "lexInline",
-           value: function lexInline(src, options) {
-             var lexer = new Lexer(options);
-             return lexer.inlineTokens(src);
-           }
-         }, {
-           key: "rules",
-           get: function get() {
-             return {
-               block: block$1,
-               inline: inline$1
-             };
-           }
-         }]);
+           return graph.revert(id);
+         };
 
-         return Lexer;
-       }();
+         return action;
+       }
 
-       var defaults$3 = defaults.defaults;
-       var cleanUrl$1 = helpers.cleanUrl,
-           escape$2 = helpers.escape;
-       /**
-        * Renderer
-        */
+       function actionRotate(rotateIds, pivot, angle, projection) {
+         var action = function action(graph) {
+           return graph.update(function (graph) {
+             utilGetAllNodes(rotateIds, graph).forEach(function (node) {
+               var point = geoRotate([projection(node.loc)], angle, pivot)[0];
+               graph = graph.replace(node.move(projection.invert(point)));
+             });
+           });
+         };
 
-       var Renderer_1 = /*#__PURE__*/function () {
-         function Renderer(options) {
-           _classCallCheck(this, Renderer);
+         return action;
+       }
 
-           this.options = options || defaults$3;
-         }
+       function actionScale(ids, pivotLoc, scaleFactor, projection) {
+         return function (graph) {
+           return graph.update(function (graph) {
+             var point, radial;
+             utilGetAllNodes(ids, graph).forEach(function (node) {
+               point = projection(node.loc);
+               radial = [point[0] - pivotLoc[0], point[1] - pivotLoc[1]];
+               point = [pivotLoc[0] + scaleFactor * radial[0], pivotLoc[1] + scaleFactor * radial[1]];
+               graph = graph.replace(node.move(projection.invert(point)));
+             });
+           });
+         };
+       }
 
-         _createClass(Renderer, [{
-           key: "code",
-           value: function code(_code, infostring, escaped) {
-             var lang = (infostring || '').match(/\S*/)[0];
+       /* Align nodes along their common axis */
 
-             if (this.options.highlight) {
-               var out = this.options.highlight(_code, lang);
+       function actionStraightenNodes(nodeIDs, projection) {
+         function positionAlongWay(a, o, b) {
+           return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+         } // returns the endpoints of the long axis of symmetry of the `points` bounding rect
 
-               if (out != null && out !== _code) {
-                 escaped = true;
-                 _code = out;
-               }
-             }
 
-             if (!lang) {
-               return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
-             }
+         function getEndpoints(points) {
+           var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+           // The shape's surrounding rectangle has 2 axes of symmetry.
+           // Snap points to the long axis
 
-             return '<pre><code class="' + this.options.langPrefix + escape$2(lang, true) + '">' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
-           }
-         }, {
-           key: "blockquote",
-           value: function blockquote(quote) {
-             return '<blockquote>\n' + quote + '</blockquote>\n';
-           }
-         }, {
-           key: "html",
-           value: function html(_html) {
-             return _html;
+           var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+           var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+           var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+           var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+           var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
+
+           if (isLong) {
+             return [p1, q1];
            }
-         }, {
-           key: "heading",
-           value: function heading(text, level, raw, slugger) {
-             if (this.options.headerIds) {
-               return '<h' + level + ' id="' + this.options.headerPrefix + slugger.slug(raw) + '">' + text + '</h' + level + '>\n';
-             } // ignore IDs
 
+           return [p2, q2];
+         }
 
-             return '<h' + level + '>' + text + '</h' + level + '>\n';
-           }
-         }, {
-           key: "hr",
-           value: function hr() {
-             return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
-           }
-         }, {
-           key: "list",
-           value: function list(body, ordered, start) {
-             var type = ordered ? 'ol' : 'ul',
-                 startatt = ordered && start !== 1 ? ' start="' + start + '"' : '';
-             return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
-           }
-         }, {
-           key: "listitem",
-           value: function listitem(text) {
-             return '<li>' + text + '</li>\n';
-           }
-         }, {
-           key: "checkbox",
-           value: function checkbox(checked) {
-             return '<input ' + (checked ? 'checked="" ' : '') + 'disabled="" type="checkbox"' + (this.options.xhtml ? ' /' : '') + '> ';
-           }
-         }, {
-           key: "paragraph",
-           value: function paragraph(text) {
-             return '<p>' + text + '</p>\n';
-           }
-         }, {
-           key: "table",
-           value: function table(header, body) {
-             if (body) body = '<tbody>' + body + '</tbody>';
-             return '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n';
-           }
-         }, {
-           key: "tablerow",
-           value: function tablerow(content) {
-             return '<tr>\n' + content + '</tr>\n';
-           }
-         }, {
-           key: "tablecell",
-           value: function tablecell(content, flags) {
-             var type = flags.header ? 'th' : 'td';
-             var tag = flags.align ? '<' + type + ' align="' + flags.align + '">' : '<' + type + '>';
-             return tag + content + '</' + type + '>\n';
-           } // span level renderer
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var nodes = nodeIDs.map(function (id) {
+             return graph.entity(id);
+           });
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var endpoints = getEndpoints(points);
+           var startPoint = endpoints[0];
+           var endPoint = endpoints[1]; // Move points onto the line connecting the endpoints
 
-         }, {
-           key: "strong",
-           value: function strong(text) {
-             return '<strong>' + text + '</strong>';
-           }
-         }, {
-           key: "em",
-           value: function em(text) {
-             return '<em>' + text + '</em>';
-           }
-         }, {
-           key: "codespan",
-           value: function codespan(text) {
-             return '<code>' + text + '</code>';
-           }
-         }, {
-           key: "br",
-           value: function br() {
-             return this.options.xhtml ? '<br/>' : '<br>';
-           }
-         }, {
-           key: "del",
-           value: function del(text) {
-             return '<del>' + text + '</del>';
+           for (var i = 0; i < points.length; i++) {
+             var node = nodes[i];
+             var point = points[i];
+             var u = positionAlongWay(point, startPoint, endPoint);
+             var point2 = geoVecInterp(startPoint, endPoint, u);
+             var loc2 = projection.invert(point2);
+             graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
            }
-         }, {
-           key: "link",
-           value: function link(href, title, text) {
-             href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
 
-             if (href === null) {
-               return text;
-             }
+           return graph;
+         };
 
-             var out = '<a href="' + escape$2(href) + '"';
+         action.disabled = function (graph) {
+           var nodes = nodeIDs.map(function (id) {
+             return graph.entity(id);
+           });
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var endpoints = getEndpoints(points);
+           var startPoint = endpoints[0];
+           var endPoint = endpoints[1];
+           var maxDistance = 0;
 
-             if (title) {
-               out += ' title="' + title + '"';
-             }
+           for (var i = 0; i < points.length; i++) {
+             var point = points[i];
+             var u = positionAlongWay(point, startPoint, endPoint);
+             var p = geoVecInterp(startPoint, endPoint, u);
+             var dist = geoVecLength(p, point);
 
-             out += '>' + text + '</a>';
-             return out;
+             if (!isNaN(dist) && dist > maxDistance) {
+               maxDistance = dist;
+             }
            }
-         }, {
-           key: "image",
-           value: function image(href, title, text) {
-             href = cleanUrl$1(this.options.sanitize, this.options.baseUrl, href);
 
-             if (href === null) {
-               return text;
-             }
+           if (maxDistance < 0.0001) {
+             return 'straight_enough';
+           }
+         };
 
-             var out = '<img src="' + href + '" alt="' + text + '"';
+         action.transitionable = true;
+         return action;
+       }
 
-             if (title) {
-               out += ' title="' + title + '"';
-             }
+       /*
+        * Based on https://github.com/openstreetmap/potlatch2/net/systemeD/potlatch2/tools/Straighten.as
+        */
 
-             out += this.options.xhtml ? '/>' : '>';
-             return out;
-           }
-         }, {
-           key: "text",
-           value: function text(_text) {
-             return _text;
-           }
-         }]);
+       function actionStraightenWay(selectedIDs, projection) {
+         function positionAlongWay(a, o, b) {
+           return geoVecDot(a, b, o) / geoVecDot(b, b, o);
+         } // Return all selected ways as a continuous, ordered array of nodes
 
-         return Renderer;
-       }();
 
-       /**
-        * TextRenderer
-        * returns only the textual part of the token
-        */
-       var TextRenderer_1 = /*#__PURE__*/function () {
-         function TextRenderer() {
-           _classCallCheck(this, TextRenderer);
-         }
+         function allNodes(graph) {
+           var nodes = [];
+           var startNodes = [];
+           var endNodes = [];
+           var remainingWays = [];
+           var selectedWays = selectedIDs.filter(function (w) {
+             return graph.entity(w).type === 'way';
+           });
+           var selectedNodes = selectedIDs.filter(function (n) {
+             return graph.entity(n).type === 'node';
+           });
 
-         _createClass(TextRenderer, [{
-           key: "strong",
-           // no need for block level renderers
-           value: function strong(text) {
-             return text;
-           }
-         }, {
-           key: "em",
-           value: function em(text) {
-             return text;
-           }
-         }, {
-           key: "codespan",
-           value: function codespan(text) {
-             return text;
-           }
-         }, {
-           key: "del",
-           value: function del(text) {
-             return text;
-           }
-         }, {
-           key: "html",
-           value: function html(text) {
-             return text;
-           }
-         }, {
-           key: "text",
-           value: function text(_text) {
-             return _text;
-           }
-         }, {
-           key: "link",
-           value: function link(href, title, text) {
-             return '' + text;
-           }
-         }, {
-           key: "image",
-           value: function image(href, title, text) {
-             return '' + text;
-           }
-         }, {
-           key: "br",
-           value: function br() {
-             return '';
-           }
-         }]);
+           for (var i = 0; i < selectedWays.length; i++) {
+             var way = graph.entity(selectedWays[i]);
+             nodes = way.nodes.slice(0);
+             remainingWays.push(nodes);
+             startNodes.push(nodes[0]);
+             endNodes.push(nodes[nodes.length - 1]);
+           } // Remove duplicate end/startNodes (duplicate nodes cannot be at the line end,
+           //   and need to be removed so currNode difference calculation below works)
+           // i.e. ["n-1", "n-1", "n-2"] => ["n-2"]
 
-         return TextRenderer;
-       }();
 
-       /**
-        * Slugger generates header id
-        */
-       var Slugger_1 = /*#__PURE__*/function () {
-         function Slugger() {
-           _classCallCheck(this, Slugger);
+           startNodes = startNodes.filter(function (n) {
+             return startNodes.indexOf(n) === startNodes.lastIndexOf(n);
+           });
+           endNodes = endNodes.filter(function (n) {
+             return endNodes.indexOf(n) === endNodes.lastIndexOf(n);
+           }); // Choose the initial endpoint to start from
 
-           this.seen = {};
-         }
+           var currNode = utilArrayDifference(startNodes, endNodes).concat(utilArrayDifference(endNodes, startNodes))[0];
+           var nextWay = [];
+           nodes = []; // Create nested function outside of loop to avoid "function in loop" lint error
 
-         _createClass(Slugger, [{
-           key: "serialize",
-           value: function serialize(value) {
-             return value.toLowerCase().trim() // remove html tags
-             .replace(/<[!\/a-z].*?>/ig, '') // remove unwanted chars
-             .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '').replace(/\s/g, '-');
-           }
-           /**
-            * Finds the next safe (unique) slug to use
-            */
+           var getNextWay = function getNextWay(currNode, remainingWays) {
+             return remainingWays.filter(function (way) {
+               return way[0] === currNode || way[way.length - 1] === currNode;
+             })[0];
+           }; // Add nodes to end of nodes array, until all ways are added
 
-         }, {
-           key: "getNextSafeSlug",
-           value: function getNextSafeSlug(originalSlug, isDryRun) {
-             var slug = originalSlug;
-             var occurenceAccumulator = 0;
 
-             if (this.seen.hasOwnProperty(slug)) {
-               occurenceAccumulator = this.seen[originalSlug];
+           while (remainingWays.length) {
+             nextWay = getNextWay(currNode, remainingWays);
+             remainingWays = utilArrayDifference(remainingWays, [nextWay]);
 
-               do {
-                 occurenceAccumulator++;
-                 slug = originalSlug + '-' + occurenceAccumulator;
-               } while (this.seen.hasOwnProperty(slug));
+             if (nextWay[0] !== currNode) {
+               nextWay.reverse();
              }
 
-             if (!isDryRun) {
-               this.seen[originalSlug] = occurenceAccumulator;
-               this.seen[slug] = 0;
-             }
+             nodes = nodes.concat(nextWay);
+             currNode = nodes[nodes.length - 1];
+           } // If user selected 2 nodes to straighten between, then slice nodes array to those nodes
 
-             return slug;
-           }
-           /**
-            * Convert string to unique id
-            * @param {object} options
-            * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
-            */
 
-         }, {
-           key: "slug",
-           value: function slug(value) {
-             var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
-             var slug = this.serialize(value);
-             return this.getNextSafeSlug(slug, options.dryrun);
+           if (selectedNodes.length === 2) {
+             var startNodeIdx = nodes.indexOf(selectedNodes[0]);
+             var endNodeIdx = nodes.indexOf(selectedNodes[1]);
+             var sortedStartEnd = [startNodeIdx, endNodeIdx];
+             sortedStartEnd.sort(function (a, b) {
+               return a - b;
+             });
+             nodes = nodes.slice(sortedStartEnd[0], sortedStartEnd[1] + 1);
            }
-         }]);
 
-         return Slugger;
-       }();
+           return nodes.map(function (n) {
+             return graph.entity(n);
+           });
+         }
 
-       var defaults$4 = defaults.defaults;
-       var unescape$2 = helpers.unescape;
-       /**
-        * Parsing & Compiling
-        */
+         function shouldKeepNode(node, graph) {
+           return graph.parentWays(node).length > 1 || graph.parentRelations(node).length || node.hasInterestingTags();
+         }
 
-       var Parser_1 = /*#__PURE__*/function () {
-         function Parser(options) {
-           _classCallCheck(this, Parser);
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var nodes = allNodes(graph);
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var startPoint = points[0];
+           var endPoint = points[points.length - 1];
+           var toDelete = [];
+           var i;
 
-           this.options = options || defaults$4;
-           this.options.renderer = this.options.renderer || new Renderer_1();
-           this.renderer = this.options.renderer;
-           this.renderer.options = this.options;
-           this.textRenderer = new TextRenderer_1();
-           this.slugger = new Slugger_1();
-         }
-         /**
-          * Static Parse Method
-          */
+           for (i = 1; i < points.length - 1; i++) {
+             var node = nodes[i];
+             var point = points[i];
 
+             if (t < 1 || shouldKeepNode(node, graph)) {
+               var u = positionAlongWay(point, startPoint, endPoint);
+               var p = geoVecInterp(startPoint, endPoint, u);
+               var loc2 = projection.invert(p);
+               graph = graph.replace(node.move(geoVecInterp(node.loc, loc2, t)));
+             } else {
+               // safe to delete
+               if (toDelete.indexOf(node) === -1) {
+                 toDelete.push(node);
+               }
+             }
+           }
 
-         _createClass(Parser, [{
-           key: "parse",
+           for (i = 0; i < toDelete.length; i++) {
+             graph = actionDeleteNode(toDelete[i].id)(graph);
+           }
 
-           /**
-            * Parse Loop
-            */
-           value: function parse(tokens) {
-             var top = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
-             var out = '',
-                 i,
-                 j,
-                 k,
-                 l2,
-                 l3,
-                 row,
-                 cell,
-                 header,
-                 body,
-                 token,
-                 ordered,
-                 start,
-                 loose,
-                 itemBody,
-                 item,
-                 checked,
-                 task,
-                 checkbox;
-             var l = tokens.length;
+           return graph;
+         };
 
-             for (i = 0; i < l; i++) {
-               token = tokens[i];
+         action.disabled = function (graph) {
+           // check way isn't too bendy
+           var nodes = allNodes(graph);
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var startPoint = points[0];
+           var endPoint = points[points.length - 1];
+           var threshold = 0.2 * geoVecLength(startPoint, endPoint);
+           var i;
 
-               switch (token.type) {
-                 case 'space':
-                   {
-                     continue;
-                   }
+           if (threshold === 0) {
+             return 'too_bendy';
+           }
 
-                 case 'hr':
-                   {
-                     out += this.renderer.hr();
-                     continue;
-                   }
+           var maxDistance = 0;
 
-                 case 'heading':
-                   {
-                     out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$2(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
-                     continue;
-                   }
+           for (i = 1; i < points.length - 1; i++) {
+             var point = points[i];
+             var u = positionAlongWay(point, startPoint, endPoint);
+             var p = geoVecInterp(startPoint, endPoint, u);
+             var dist = geoVecLength(p, point); // to bendy if point is off by 20% of total start/end distance in projected space
 
-                 case 'code':
-                   {
-                     out += this.renderer.code(token.text, token.lang, token.escaped);
-                     continue;
-                   }
+             if (isNaN(dist) || dist > threshold) {
+               return 'too_bendy';
+             } else if (dist > maxDistance) {
+               maxDistance = dist;
+             }
+           }
 
-                 case 'table':
-                   {
-                     header = ''; // header
+           var keepingAllNodes = nodes.every(function (node, i) {
+             return i === 0 || i === nodes.length - 1 || shouldKeepNode(node, graph);
+           });
 
-                     cell = '';
-                     l2 = token.header.length;
+           if (maxDistance < 0.0001 && // Allow straightening even if already straight in order to remove extraneous nodes
+           keepingAllNodes) {
+             return 'straight_enough';
+           }
+         };
 
-                     for (j = 0; j < l2; j++) {
-                       cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
-                         header: true,
-                         align: token.align[j]
-                       });
-                     }
+         action.transitionable = true;
+         return action;
+       }
 
-                     header += this.renderer.tablerow(cell);
-                     body = '';
-                     l2 = token.cells.length;
+       //
+       // `turn` must be an `osmTurn` object with a `restrictionID` property.
+       // see osm/intersection.js, pathToTurn()
+       //
 
-                     for (j = 0; j < l2; j++) {
-                       row = token.tokens.cells[j];
-                       cell = '';
-                       l3 = row.length;
+       function actionUnrestrictTurn(turn) {
+         return function (graph) {
+           return actionDeleteRelation(turn.restrictionID)(graph);
+         };
+       }
 
-                       for (k = 0; k < l3; k++) {
-                         cell += this.renderer.tablecell(this.parseInline(row[k]), {
-                           header: false,
-                           align: token.align[k]
-                         });
-                       }
+       /* Reflect the given area around its axis of symmetry */
 
-                       body += this.renderer.tablerow(cell);
-                     }
+       function actionReflect(reflectIds, projection) {
+         var _useLongAxis = true;
 
-                     out += this.renderer.table(header, body);
-                     continue;
-                   }
+         var action = function action(graph, t) {
+           if (t === null || !isFinite(t)) t = 1;
+           t = Math.min(Math.max(+t, 0), 1);
+           var nodes = utilGetAllNodes(reflectIds, graph);
+           var points = nodes.map(function (n) {
+             return projection(n.loc);
+           });
+           var ssr = geoGetSmallestSurroundingRectangle(points); // Choose line pq = axis of symmetry.
+           // The shape's surrounding rectangle has 2 axes of symmetry.
+           // Reflect across the longer axis by default.
 
-                 case 'blockquote':
-                   {
-                     body = this.parse(token.tokens);
-                     out += this.renderer.blockquote(body);
-                     continue;
-                   }
+           var p1 = [(ssr.poly[0][0] + ssr.poly[1][0]) / 2, (ssr.poly[0][1] + ssr.poly[1][1]) / 2];
+           var q1 = [(ssr.poly[2][0] + ssr.poly[3][0]) / 2, (ssr.poly[2][1] + ssr.poly[3][1]) / 2];
+           var p2 = [(ssr.poly[3][0] + ssr.poly[4][0]) / 2, (ssr.poly[3][1] + ssr.poly[4][1]) / 2];
+           var q2 = [(ssr.poly[1][0] + ssr.poly[2][0]) / 2, (ssr.poly[1][1] + ssr.poly[2][1]) / 2];
+           var p, q;
+           var isLong = geoVecLength(p1, q1) > geoVecLength(p2, q2);
 
-                 case 'list':
-                   {
-                     ordered = token.ordered;
-                     start = token.start;
-                     loose = token.loose;
-                     l2 = token.items.length;
-                     body = '';
+           if (_useLongAxis && isLong || !_useLongAxis && !isLong) {
+             p = p1;
+             q = q1;
+           } else {
+             p = p2;
+             q = q2;
+           } // reflect c across pq
+           // http://math.stackexchange.com/questions/65503/point-reflection-over-a-line
 
-                     for (j = 0; j < l2; j++) {
-                       item = token.items[j];
-                       checked = item.checked;
-                       task = item.task;
-                       itemBody = '';
 
-                       if (item.task) {
-                         checkbox = this.renderer.checkbox(checked);
+           var dx = q[0] - p[0];
+           var dy = q[1] - p[1];
+           var a = (dx * dx - dy * dy) / (dx * dx + dy * dy);
+           var b = 2 * dx * dy / (dx * dx + dy * dy);
 
-                         if (loose) {
-                           if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
-                             item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
+           for (var i = 0; i < nodes.length; i++) {
+             var node = nodes[i];
+             var c = projection(node.loc);
+             var c2 = [a * (c[0] - p[0]) + b * (c[1] - p[1]) + p[0], b * (c[0] - p[0]) - a * (c[1] - p[1]) + p[1]];
+             var loc2 = projection.invert(c2);
+             node = node.move(geoVecInterp(node.loc, loc2, t));
+             graph = graph.replace(node);
+           }
 
-                             if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
-                               item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
-                             }
-                           } else {
-                             item.tokens.unshift({
-                               type: 'text',
-                               text: checkbox
-                             });
-                           }
-                         } else {
-                           itemBody += checkbox;
-                         }
-                       }
+           return graph;
+         };
 
-                       itemBody += this.parse(item.tokens, loose);
-                       body += this.renderer.listitem(itemBody, task, checked);
-                     }
+         action.useLongAxis = function (val) {
+           if (!arguments.length) return _useLongAxis;
+           _useLongAxis = val;
+           return action;
+         };
 
-                     out += this.renderer.list(body, ordered, start);
-                     continue;
-                   }
+         action.transitionable = true;
+         return action;
+       }
 
-                 case 'html':
-                   {
-                     // TODO parse inline content if parameter markdown=1
-                     out += this.renderer.html(token.text);
-                     continue;
-                   }
+       function actionUpgradeTags(entityId, oldTags, replaceTags) {
+         return function (graph) {
+           var entity = graph.entity(entityId);
+           var tags = Object.assign({}, entity.tags); // shallow copy
 
-                 case 'paragraph':
-                   {
-                     out += this.renderer.paragraph(this.parseInline(token.tokens));
-                     continue;
-                   }
+           var transferValue;
+           var semiIndex;
 
-                 case 'text':
-                   {
-                     body = token.tokens ? this.parseInline(token.tokens) : token.text;
+           for (var oldTagKey in oldTags) {
+             if (!(oldTagKey in tags)) continue; // wildcard match
 
-                     while (i + 1 < l && tokens[i + 1].type === 'text') {
-                       token = tokens[++i];
-                       body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
-                     }
+             if (oldTags[oldTagKey] === '*') {
+               // note the value since we might need to transfer it
+               transferValue = tags[oldTagKey];
+               delete tags[oldTagKey]; // exact match
+             } else if (oldTags[oldTagKey] === tags[oldTagKey]) {
+               delete tags[oldTagKey]; // match is within semicolon-delimited values
+             } else {
+               var vals = tags[oldTagKey].split(';').filter(Boolean);
+               var oldIndex = vals.indexOf(oldTags[oldTagKey]);
 
-                     out += top ? this.renderer.paragraph(body) : body;
-                     continue;
-                   }
+               if (vals.length === 1 || oldIndex === -1) {
+                 delete tags[oldTagKey];
+               } else {
+                 if (replaceTags && replaceTags[oldTagKey]) {
+                   // replacing a value within a semicolon-delimited value, note the index
+                   semiIndex = oldIndex;
+                 }
 
-                 default:
-                   {
-                     var errMsg = 'Token with "' + token.type + '" type was not found.';
+                 vals.splice(oldIndex, 1);
+                 tags[oldTagKey] = vals.join(';');
+               }
+             }
+           }
 
-                     if (this.options.silent) {
-                       console.error(errMsg);
-                       return;
-                     } else {
-                       throw new Error(errMsg);
-                     }
+           if (replaceTags) {
+             for (var replaceKey in replaceTags) {
+               var replaceValue = replaceTags[replaceKey];
+
+               if (replaceValue === '*') {
+                 if (tags[replaceKey] && tags[replaceKey] !== 'no') {
+                   // allow any pre-existing value except `no` (troll tag)
+                   continue;
+                 } else {
+                   // otherwise assume `yes` is okay
+                   tags[replaceKey] = 'yes';
+                 }
+               } else if (replaceValue === '$1') {
+                 tags[replaceKey] = transferValue;
+               } else {
+                 if (tags[replaceKey] && oldTags[replaceKey] && semiIndex !== undefined) {
+                   // don't override preexisting values
+                   var existingVals = tags[replaceKey].split(';').filter(Boolean);
+
+                   if (existingVals.indexOf(replaceValue) === -1) {
+                     existingVals.splice(semiIndex, 0, replaceValue);
+                     tags[replaceKey] = existingVals.join(';');
                    }
+                 } else {
+                   tags[replaceKey] = replaceValue;
+                 }
                }
              }
-
-             return out;
            }
-           /**
-            * Parse Inline Tokens
-            */
 
-         }, {
-           key: "parseInline",
-           value: function parseInline(tokens, renderer) {
-             renderer = renderer || this.renderer;
-             var out = '',
-                 i,
-                 token;
-             var l = tokens.length;
+           return graph.replace(entity.update({
+             tags: tags
+           }));
+         };
+       }
 
-             for (i = 0; i < l; i++) {
-               token = tokens[i];
+       function behaviorEdit(context) {
+         function behavior() {
+           context.map().minzoom(context.minEditableZoom());
+         }
 
-               switch (token.type) {
-                 case 'escape':
-                   {
-                     out += renderer.text(token.text);
-                     break;
-                   }
+         behavior.off = function () {
+           context.map().minzoom(0);
+         };
 
-                 case 'html':
-                   {
-                     out += renderer.html(token.text);
-                     break;
-                   }
+         return behavior;
+       }
 
-                 case 'link':
-                   {
-                     out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+       /*
+          The hover behavior adds the `.hover` class on pointerover to all elements to which
+          the identical datum is bound, and removes it on pointerout.
 
-                 case 'image':
-                   {
-                     out += renderer.image(token.href, token.title, token.text);
-                     break;
-                   }
+          The :hover pseudo-class is insufficient for iD's purposes because a datum's visual
+          representation may consist of several elements scattered throughout the DOM hierarchy.
+          Only one of these elements can have the :hover pseudo-class, but all of them will
+          have the .hover class.
+        */
+
+       function behaviorHover(context) {
+         var dispatch = dispatch$8('hover');
+
+         var _selection = select(null);
+
+         var _newNodeId = null;
+         var _initialNodeID = null;
+
+         var _altDisables;
+
+         var _ignoreVertex;
+
+         var _targets = []; // use pointer events on supported platforms; fallback to mouse events
+
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+
+         function keydown(d3_event) {
+           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             _selection.selectAll('.hover').classed('hover-suppressed', true).classed('hover', false);
+
+             _selection.classed('hover-disabled', true);
+
+             dispatch.call('hover', this, null);
+           }
+         }
 
-                 case 'strong':
-                   {
-                     out += renderer.strong(this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+         function keyup(d3_event) {
+           if (_altDisables && d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false).classed('hover', true);
 
-                 case 'em':
-                   {
-                     out += renderer.em(this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+             _selection.classed('hover-disabled', false);
 
-                 case 'codespan':
-                   {
-                     out += renderer.codespan(token.text);
-                     break;
-                   }
+             dispatch.call('hover', this, _targets);
+           }
+         }
 
-                 case 'br':
-                   {
-                     out += renderer.br();
-                     break;
-                   }
+         function behavior(selection) {
+           _selection = selection;
+           _targets = [];
 
-                 case 'del':
-                   {
-                     out += renderer.del(this.parseInline(token.tokens, renderer));
-                     break;
-                   }
+           if (_initialNodeID) {
+             _newNodeId = _initialNodeID;
+             _initialNodeID = null;
+           } else {
+             _newNodeId = null;
+           }
 
-                 case 'text':
-                   {
-                     out += renderer.text(token.text);
-                     break;
-                   }
+           _selection.on(_pointerPrefix + 'over.hover', pointerover).on(_pointerPrefix + 'out.hover', pointerout) // treat pointerdown as pointerover for touch devices
+           .on(_pointerPrefix + 'down.hover', pointerover);
 
-                 default:
-                   {
-                     var errMsg = 'Token with "' + token.type + '" type was not found.';
+           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', pointerout, true).on('keydown.hover', keydown).on('keyup.hover', keyup);
 
-                     if (this.options.silent) {
-                       console.error(errMsg);
-                       return;
-                     } else {
-                       throw new Error(errMsg);
-                     }
-                   }
-               }
+           function eventTarget(d3_event) {
+             var datum = d3_event.target && d3_event.target.__data__;
+             if (_typeof(datum) !== 'object') return null;
+
+             if (!(datum instanceof osmEntity) && datum.properties && datum.properties.entity instanceof osmEntity) {
+               return datum.properties.entity;
              }
 
-             return out;
-           }
-         }], [{
-           key: "parse",
-           value: function parse(tokens, options) {
-             var parser = new Parser(options);
-             return parser.parse(tokens);
+             return datum;
            }
-           /**
-            * Static Parse Inline Method
-            */
 
-         }, {
-           key: "parseInline",
-           value: function parseInline(tokens, options) {
-             var parser = new Parser(options);
-             return parser.parseInline(tokens);
+           function pointerover(d3_event) {
+             // ignore mouse hovers with buttons pressed unless dragging
+             if (context.mode().id.indexOf('drag') === -1 && (!d3_event.pointerType || d3_event.pointerType === 'mouse') && d3_event.buttons) return;
+             var target = eventTarget(d3_event);
+
+             if (target && _targets.indexOf(target) === -1) {
+               _targets.push(target);
+
+               updateHover(d3_event, _targets);
+             }
            }
-         }]);
 
-         return Parser;
-       }();
+           function pointerout(d3_event) {
+             var target = eventTarget(d3_event);
 
-       var merge$3 = helpers.merge,
-           checkSanitizeDeprecation$1 = helpers.checkSanitizeDeprecation,
-           escape$3 = helpers.escape;
-       var getDefaults = defaults.getDefaults,
-           changeDefaults = defaults.changeDefaults,
-           defaults$5 = defaults.defaults;
-       /**
-        * Marked
-        */
+             var index = _targets.indexOf(target);
 
-       function marked(src, opt, callback) {
-         // throw error in case of non string input
-         if (typeof src === 'undefined' || src === null) {
-           throw new Error('marked(): input parameter is undefined or null');
-         }
+             if (index !== -1) {
+               _targets.splice(index);
 
-         if (typeof src !== 'string') {
-           throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
-         }
+               updateHover(d3_event, _targets);
+             }
+           }
 
-         if (typeof opt === 'function') {
-           callback = opt;
-           opt = null;
-         }
+           function allowsVertex(d) {
+             return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+           }
 
-         opt = merge$3({}, marked.defaults, opt || {});
-         checkSanitizeDeprecation$1(opt);
+           function modeAllowsHover(target) {
+             var mode = context.mode();
 
-         if (callback) {
-           var highlight = opt.highlight;
-           var tokens;
+             if (mode.id === 'add-point') {
+               return mode.preset.matchGeometry('vertex') || target.type !== 'way' && target.geometry(context.graph()) !== 'vertex';
+             }
 
-           try {
-             tokens = Lexer_1.lex(src, opt);
-           } catch (e) {
-             return callback(e);
+             return true;
            }
 
-           var done = function done(err) {
-             var out;
+           function updateHover(d3_event, targets) {
+             _selection.selectAll('.hover').classed('hover', false);
 
-             if (!err) {
-               try {
-                 out = Parser_1.parse(tokens, opt);
-               } catch (e) {
-                 err = e;
-               }
+             _selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+
+             var mode = context.mode();
+
+             if (!_newNodeId && (mode.id === 'draw-line' || mode.id === 'draw-area')) {
+               var node = targets.find(function (target) {
+                 return target instanceof osmEntity && target.type === 'node';
+               });
+               _newNodeId = node && node.id;
              }
 
-             opt.highlight = highlight;
-             return err ? callback(err) : callback(null, out);
-           };
+             targets = targets.filter(function (datum) {
+               if (datum instanceof osmEntity) {
+                 // If drawing a way, don't hover on a node that was just placed. #3974
+                 return datum.id !== _newNodeId && (datum.type !== 'node' || !_ignoreVertex || allowsVertex(datum)) && modeAllowsHover(datum);
+               }
 
-           if (!highlight || highlight.length < 3) {
-             return done();
-           }
+               return true;
+             });
+             var selector = '';
 
-           delete opt.highlight;
-           if (!tokens.length) return done();
-           var pending = 0;
-           marked.walkTokens(tokens, function (token) {
-             if (token.type === 'code') {
-               pending++;
-               setTimeout(function () {
-                 highlight(token.text, token.lang, function (err, code) {
-                   if (err) {
-                     return done(err);
-                   }
+             for (var i in targets) {
+               var datum = targets[i]; // What are we hovering over?
 
-                   if (code != null && code !== token.text) {
-                     token.text = code;
-                     token.escaped = true;
+               if (datum.__featurehash__) {
+                 // hovering custom data
+                 selector += ', .data' + datum.__featurehash__;
+               } else if (datum instanceof QAItem) {
+                 selector += ', .' + datum.service + '.itemId-' + datum.id;
+               } else if (datum instanceof osmNote) {
+                 selector += ', .note-' + datum.id;
+               } else if (datum instanceof osmEntity) {
+                 selector += ', .' + datum.id;
+
+                 if (datum.type === 'relation') {
+                   for (var j in datum.members) {
+                     selector += ', .' + datum.members[j].id;
                    }
+                 }
+               }
+             }
 
-                   pending--;
+             var suppressed = _altDisables && d3_event && d3_event.altKey;
 
-                   if (pending === 0) {
-                     done();
-                   }
-                 });
-               }, 0);
+             if (selector.trim().length) {
+               // remove the first comma
+               selector = selector.slice(1);
+
+               _selection.selectAll(selector).classed(suppressed ? 'hover-suppressed' : 'hover', true);
              }
-           });
 
-           if (pending === 0) {
-             done();
+             dispatch.call('hover', this, !suppressed && targets);
            }
-
-           return;
          }
 
-         try {
-           var _tokens = Lexer_1.lex(src, opt);
+         behavior.off = function (selection) {
+           selection.selectAll('.hover').classed('hover', false);
+           selection.selectAll('.hover-suppressed').classed('hover-suppressed', false);
+           selection.classed('hover-disabled', false);
+           selection.on(_pointerPrefix + 'over.hover', null).on(_pointerPrefix + 'out.hover', null).on(_pointerPrefix + 'down.hover', null);
+           select(window).on(_pointerPrefix + 'up.hover pointercancel.hover', null, true).on('keydown.hover', null).on('keyup.hover', null);
+         };
 
-           if (opt.walkTokens) {
-             marked.walkTokens(_tokens, opt.walkTokens);
-           }
+         behavior.altDisables = function (val) {
+           if (!arguments.length) return _altDisables;
+           _altDisables = val;
+           return behavior;
+         };
 
-           return Parser_1.parse(_tokens, opt);
-         } catch (e) {
-           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+         behavior.ignoreVertex = function (val) {
+           if (!arguments.length) return _ignoreVertex;
+           _ignoreVertex = val;
+           return behavior;
+         };
 
-           if (opt.silent) {
-             return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
-           }
+         behavior.initialNodeID = function (nodeId) {
+           _initialNodeID = nodeId;
+           return behavior;
+         };
 
-           throw e;
-         }
+         return utilRebind(behavior, dispatch, 'on');
        }
-       /**
-        * Options
-        */
 
+       var _disableSpace = false;
+       var _lastSpace = null;
+       function behaviorDraw(context) {
+         var dispatch = dispatch$8('move', 'down', 'downcancel', 'click', 'clickWay', 'clickNode', 'undo', 'cancel', 'finish');
+         var keybinding = utilKeybinding('draw');
 
-       marked.options = marked.setOptions = function (opt) {
-         merge$3(marked.defaults, opt);
-         changeDefaults(marked.defaults);
-         return marked;
-       };
+         var _hover = behaviorHover(context).altDisables(true).ignoreVertex(true).on('hover', context.ui().sidebar.hover);
 
-       marked.getDefaults = getDefaults;
-       marked.defaults = defaults$5;
-       /**
-        * Use Extension
-        */
+         var _edit = behaviorEdit(context);
 
-       marked.use = function (extension) {
-         var opts = merge$3({}, extension);
+         var _closeTolerance = 4;
+         var _tolerance = 12;
+         var _mouseLeave = false;
+         var _lastMouse = null;
 
-         if (extension.renderer) {
-           (function () {
-             var renderer = marked.defaults.renderer || new Renderer_1();
+         var _lastPointerUpEvent;
 
-             var _loop = function _loop(prop) {
-               var prevRenderer = renderer[prop];
+         var _downPointer; // use pointer events on supported platforms; fallback to mouse events
 
-               renderer[prop] = function () {
-                 for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
-                   args[_key] = arguments[_key];
-                 }
 
-                 var ret = extension.renderer[prop].apply(renderer, args);
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // related code
+         // - `mode/drag_node.js` `datum()`
 
-                 if (ret === false) {
-                   ret = prevRenderer.apply(renderer, args);
-                 }
 
-                 return ret;
-               };
-             };
+         function datum(d3_event) {
+           var mode = context.mode();
+           var isNote = mode && mode.id.indexOf('note') !== -1;
+           if (d3_event.altKey || isNote) return {};
+           var element;
 
-             for (var prop in extension.renderer) {
-               _loop(prop);
-             }
+           if (d3_event.type === 'keydown') {
+             element = _lastMouse && _lastMouse.target;
+           } else {
+             element = d3_event.target;
+           } // When drawing, snap only to touch targets..
+           // (this excludes area fills and active drawing elements)
 
-             opts.renderer = renderer;
-           })();
-         }
 
-         if (extension.tokenizer) {
-           (function () {
-             var tokenizer = marked.defaults.tokenizer || new Tokenizer_1();
+           var d = element.__data__;
+           return d && d.properties && d.properties.target ? d : {};
+         }
 
-             var _loop2 = function _loop2(prop) {
-               var prevTokenizer = tokenizer[prop];
+         function pointerdown(d3_event) {
+           if (_downPointer) return;
+           var pointerLocGetter = utilFastMouse(this);
+           _downPointer = {
+             id: d3_event.pointerId || 'mouse',
+             pointerLocGetter: pointerLocGetter,
+             downTime: +new Date(),
+             downLoc: pointerLocGetter(d3_event)
+           };
+           dispatch.call('down', this, d3_event, datum(d3_event));
+         }
 
-               tokenizer[prop] = function () {
-                 for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
-                   args[_key2] = arguments[_key2];
-                 }
+         function pointerup(d3_event) {
+           if (!_downPointer || _downPointer.id !== (d3_event.pointerId || 'mouse')) return;
+           var downPointer = _downPointer;
+           _downPointer = null;
+           _lastPointerUpEvent = d3_event;
+           if (downPointer.isCancelled) return;
+           var t2 = +new Date();
+           var p2 = downPointer.pointerLocGetter(d3_event);
+           var dist = geoVecLength(downPointer.downLoc, p2);
 
-                 var ret = extension.tokenizer[prop].apply(tokenizer, args);
+           if (dist < _closeTolerance || dist < _tolerance && t2 - downPointer.downTime < 500) {
+             // Prevent a quick second click
+             select(window).on('click.draw-block', function () {
+               d3_event.stopPropagation();
+             }, true);
+             context.map().dblclickZoomEnable(false);
+             window.setTimeout(function () {
+               context.map().dblclickZoomEnable(true);
+               select(window).on('click.draw-block', null);
+             }, 500);
+             click(d3_event, p2);
+           }
+         }
 
-                 if (ret === false) {
-                   ret = prevTokenizer.apply(tokenizer, args);
-                 }
+         function pointermove(d3_event) {
+           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse') && !_downPointer.isCancelled) {
+             var p2 = _downPointer.pointerLocGetter(d3_event);
 
-                 return ret;
-               };
-             };
+             var dist = geoVecLength(_downPointer.downLoc, p2);
 
-             for (var prop in extension.tokenizer) {
-               _loop2(prop);
+             if (dist >= _closeTolerance) {
+               _downPointer.isCancelled = true;
+               dispatch.call('downcancel', this);
              }
+           }
 
-             opts.tokenizer = tokenizer;
-           })();
+           if (d3_event.pointerType && d3_event.pointerType !== 'mouse' || d3_event.buttons || _downPointer) return; // HACK: Mobile Safari likes to send one or more `mouse` type pointermove
+           // events immediately after non-mouse pointerup events; detect and ignore them.
+
+           if (_lastPointerUpEvent && _lastPointerUpEvent.pointerType !== 'mouse' && d3_event.timeStamp - _lastPointerUpEvent.timeStamp < 100) return;
+           _lastMouse = d3_event;
+           dispatch.call('move', this, d3_event, datum(d3_event));
          }
 
-         if (extension.walkTokens) {
-           var walkTokens = marked.defaults.walkTokens;
+         function pointercancel(d3_event) {
+           if (_downPointer && _downPointer.id === (d3_event.pointerId || 'mouse')) {
+             if (!_downPointer.isCancelled) {
+               dispatch.call('downcancel', this);
+             }
 
-           opts.walkTokens = function (token) {
-             extension.walkTokens(token);
+             _downPointer = null;
+           }
+         }
 
-             if (walkTokens) {
-               walkTokens(token);
-             }
-           };
+         function mouseenter() {
+           _mouseLeave = false;
          }
 
-         marked.setOptions(opts);
-       };
-       /**
-        * Run callback for every token
-        */
+         function mouseleave() {
+           _mouseLeave = true;
+         }
 
+         function allowsVertex(d) {
+           return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+         } // related code
+         // - `mode/drag_node.js`     `doMove()`
+         // - `behavior/draw.js`      `click()`
+         // - `behavior/draw_way.js`  `move()`
 
-       marked.walkTokens = function (tokens, callback) {
-         var _iterator = _createForOfIteratorHelper(tokens),
-             _step;
 
-         try {
-           for (_iterator.s(); !(_step = _iterator.n()).done;) {
-             var token = _step.value;
-             callback(token);
+         function click(d3_event, loc) {
+           var d = datum(d3_event);
+           var target = d && d.properties && d.properties.entity;
+           var mode = context.mode();
 
-             switch (token.type) {
-               case 'table':
-                 {
-                   var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
-                       _step2;
+           if (target && target.type === 'node' && allowsVertex(target)) {
+             // Snap to a node
+             dispatch.call('clickNode', this, target, d);
+             return;
+           } else if (target && target.type === 'way' && (mode.id !== 'add-point' || mode.preset.matchGeometry('vertex'))) {
+             // Snap to a way
+             var choice = geoChooseEdge(context.graph().childNodes(target), loc, context.projection, context.activeID());
 
-                   try {
-                     for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
-                       var cell = _step2.value;
-                       marked.walkTokens(cell, callback);
-                     }
-                   } catch (err) {
-                     _iterator2.e(err);
-                   } finally {
-                     _iterator2.f();
-                   }
+             if (choice) {
+               var edge = [target.nodes[choice.index - 1], target.nodes[choice.index]];
+               dispatch.call('clickWay', this, choice.loc, edge, d);
+               return;
+             }
+           } else if (mode.id !== 'add-point' || mode.preset.matchGeometry('point')) {
+             var locLatLng = context.projection.invert(loc);
+             dispatch.call('click', this, locLatLng, d);
+           }
+         } // treat a spacebar press like a click
 
-                   var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
-                       _step3;
 
-                   try {
-                     for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
-                       var row = _step3.value;
+         function space(d3_event) {
+           d3_event.preventDefault();
+           d3_event.stopPropagation();
+           var currSpace = context.map().mouse();
 
-                       var _iterator4 = _createForOfIteratorHelper(row),
-                           _step4;
+           if (_disableSpace && _lastSpace) {
+             var dist = geoVecLength(_lastSpace, currSpace);
 
-                       try {
-                         for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
-                           var _cell = _step4.value;
-                           marked.walkTokens(_cell, callback);
-                         }
-                       } catch (err) {
-                         _iterator4.e(err);
-                       } finally {
-                         _iterator4.f();
-                       }
-                     }
-                   } catch (err) {
-                     _iterator3.e(err);
-                   } finally {
-                     _iterator3.f();
-                   }
+             if (dist > _tolerance) {
+               _disableSpace = false;
+             }
+           }
 
-                   break;
-                 }
+           if (_disableSpace || _mouseLeave || !_lastMouse) return; // user must move mouse or release space bar to allow another click
 
-               case 'list':
-                 {
-                   marked.walkTokens(token.items, callback);
-                   break;
-                 }
+           _lastSpace = currSpace;
+           _disableSpace = true;
+           select(window).on('keyup.space-block', function () {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             _disableSpace = false;
+             select(window).on('keyup.space-block', null);
+           }); // get the current mouse position
 
-               default:
-                 {
-                   if (token.tokens) {
-                     marked.walkTokens(token.tokens, callback);
-                   }
-                 }
-             }
-           }
-         } catch (err) {
-           _iterator.e(err);
-         } finally {
-           _iterator.f();
+           var loc = context.map().mouse() || // or the map center if the mouse has never entered the map
+           context.projection(context.map().center());
+           click(d3_event, loc);
+         }
+
+         function backspace(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('undo');
          }
-       };
-       /**
-        * Parse Inline
-        */
 
+         function del(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('cancel');
+         }
 
-       marked.parseInline = function (src, opt) {
-         // throw error in case of non string input
-         if (typeof src === 'undefined' || src === null) {
-           throw new Error('marked.parseInline(): input parameter is undefined or null');
+         function ret(d3_event) {
+           d3_event.preventDefault();
+           dispatch.call('finish');
          }
 
-         if (typeof src !== 'string') {
-           throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+         function behavior(selection) {
+           context.install(_hover);
+           context.install(_edit);
+           _downPointer = null;
+           keybinding.on('⌫', backspace).on('⌦', del).on('⎋', ret).on('↩', ret).on('space', space).on('⌥space', space);
+           selection.on('mouseenter.draw', mouseenter).on('mouseleave.draw', mouseleave).on(_pointerPrefix + 'down.draw', pointerdown).on(_pointerPrefix + 'move.draw', pointermove);
+           select(window).on(_pointerPrefix + 'up.draw', pointerup, true).on('pointercancel.draw', pointercancel, true);
+           select(document).call(keybinding);
+           return behavior;
          }
 
-         opt = merge$3({}, marked.defaults, opt || {});
-         checkSanitizeDeprecation$1(opt);
+         behavior.off = function (selection) {
+           context.ui().sidebar.hover.cancel();
+           context.uninstall(_hover);
+           context.uninstall(_edit);
+           selection.on('mouseenter.draw', null).on('mouseleave.draw', null).on(_pointerPrefix + 'down.draw', null).on(_pointerPrefix + 'move.draw', null);
+           select(window).on(_pointerPrefix + 'up.draw', null).on('pointercancel.draw', null); // note: keyup.space-block, click.draw-block should remain
 
-         try {
-           var tokens = Lexer_1.lexInline(src, opt);
+           select(document).call(keybinding.unbind);
+         };
 
-           if (opt.walkTokens) {
-             marked.walkTokens(tokens, opt.walkTokens);
-           }
+         behavior.hover = function () {
+           return _hover;
+         };
 
-           return Parser_1.parseInline(tokens, opt);
-         } catch (e) {
-           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
+         return utilRebind(behavior, dispatch, 'on');
+       }
 
-           if (opt.silent) {
-             return '<p>An error occurred:</p><pre>' + escape$3(e.message + '', true) + '</pre>';
-           }
+       function initRange(domain, range) {
+         switch (arguments.length) {
+           case 0:
+             break;
 
-           throw e;
+           case 1:
+             this.range(domain);
+             break;
+
+           default:
+             this.range(range).domain(domain);
+             break;
          }
-       };
-       /**
-        * Expose
-        */
 
+         return this;
+       }
 
-       marked.Parser = Parser_1;
-       marked.parser = Parser_1.parse;
-       marked.Renderer = Renderer_1;
-       marked.TextRenderer = TextRenderer_1;
-       marked.Lexer = Lexer_1;
-       marked.lexer = Lexer_1.lex;
-       marked.Tokenizer = Tokenizer_1;
-       marked.Slugger = Slugger_1;
-       marked.parse = marked;
-       var marked_1 = marked;
+       function constants(x) {
+         return function () {
+           return x;
+         };
+       }
 
-       var tiler$2 = utilTiler();
-       var dispatch$3 = dispatch('loaded');
-       var _tileZoom$2 = 14;
-       var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
-       var _osmoseData = {
-         icons: {},
-         items: []
-       }; // This gets reassigned if reset
+       function number(x) {
+         return +x;
+       }
 
-       var _cache$2;
+       var unit = [0, 1];
+       function identity$1(x) {
+         return x;
+       }
 
-       function abortRequest$2(controller) {
-         if (controller) {
-           controller.abort();
-         }
+       function normalize(a, b) {
+         return (b -= a = +a) ? function (x) {
+           return (x - a) / b;
+         } : constants(isNaN(b) ? NaN : 0.5);
        }
 
-       function abortUnwantedRequests$2(cache, tiles) {
-         Object.keys(cache.inflightTile).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k === tile.id;
-           });
+       function clamper(a, b) {
+         var t;
+         if (a > b) t = a, a = b, b = t;
+         return function (x) {
+           return Math.max(a, Math.min(b, x));
+         };
+       } // normalize(a, b)(x) takes a domain value x in [a,b] and returns the corresponding parameter t in [0,1].
+       // interpolate(a, b)(t) takes a parameter t in [0,1] and returns the corresponding range value x in [a,b].
 
-           if (!wanted) {
-             abortRequest$2(cache.inflightTile[k]);
-             delete cache.inflightTile[k];
-           }
-         });
-       }
 
-       function encodeIssueRtree$2(d) {
-         return {
-           minX: d.loc[0],
-           minY: d.loc[1],
-           maxX: d.loc[0],
-           maxY: d.loc[1],
-           data: d
+       function bimap(domain, range, interpolate) {
+         var d0 = domain[0],
+             d1 = domain[1],
+             r0 = range[0],
+             r1 = range[1];
+         if (d1 < d0) d0 = normalize(d1, d0), r0 = interpolate(r1, r0);else d0 = normalize(d0, d1), r0 = interpolate(r0, r1);
+         return function (x) {
+           return r0(d0(x));
          };
-       } // Replace or remove QAItem from rtree
+       }
 
+       function polymap(domain, range, interpolate) {
+         var j = Math.min(domain.length, range.length) - 1,
+             d = new Array(j),
+             r = new Array(j),
+             i = -1; // Reverse descending domains.
 
-       function updateRtree$2(item, replace) {
-         _cache$2.rtree.remove(item, function (a, b) {
-           return a.data.id === b.data.id;
-         });
+         if (domain[j] < domain[0]) {
+           domain = domain.slice().reverse();
+           range = range.slice().reverse();
+         }
 
-         if (replace) {
-           _cache$2.rtree.insert(item);
+         while (++i < j) {
+           d[i] = normalize(domain[i], domain[i + 1]);
+           r[i] = interpolate(range[i], range[i + 1]);
          }
-       } // Issues shouldn't obscure each other
 
+         return function (x) {
+           var i = bisectRight(domain, x, 1, j) - 1;
+           return r[i](d[i](x));
+         };
+       }
 
-       function preventCoincident$1(loc) {
-         var coincident = false;
+       function copy(source, target) {
+         return target.domain(source.domain()).range(source.range()).interpolate(source.interpolate()).clamp(source.clamp()).unknown(source.unknown());
+       }
+       function transformer() {
+         var domain = unit,
+             range = unit,
+             interpolate = interpolate$1,
+             transform,
+             untransform,
+             unknown,
+             clamp = identity$1,
+             piecewise,
+             output,
+             input;
 
-         do {
-           // first time, move marker up. after that, move marker right.
-           var delta = coincident ? [0.00001, 0] : [0, 0.00001];
-           loc = geoVecAdd(loc, delta);
-           var bbox = geoExtent(loc).bbox();
-           coincident = _cache$2.rtree.search(bbox).length;
-         } while (coincident);
+         function rescale() {
+           var n = Math.min(domain.length, range.length);
+           if (clamp !== identity$1) clamp = clamper(domain[0], domain[n - 1]);
+           piecewise = n > 2 ? polymap : bimap;
+           output = input = null;
+           return scale;
+         }
 
-         return loc;
-       }
+         function scale(x) {
+           return x == null || isNaN(x = +x) ? unknown : (output || (output = piecewise(domain.map(transform), range, interpolate)))(transform(clamp(x)));
+         }
 
-       var serviceOsmose = {
-         title: 'osmose',
-         init: function init() {
-           _mainFileFetcher.get('qa_data').then(function (d) {
-             _osmoseData = d.osmose;
-             _osmoseData.items = Object.keys(d.osmose.icons).map(function (s) {
-               return s.split('-')[0];
-             }).reduce(function (unique, item) {
-               return unique.indexOf(item) !== -1 ? unique : [].concat(_toConsumableArray(unique), [item]);
-             }, []);
-           });
+         scale.invert = function (y) {
+           return clamp(untransform((input || (input = piecewise(range, domain.map(transform), d3_interpolateNumber)))(y)));
+         };
 
-           if (!_cache$2) {
-             this.reset();
-           }
+         scale.domain = function (_) {
+           return arguments.length ? (domain = Array.from(_, number), rescale()) : domain.slice();
+         };
 
-           this.event = utilRebind(this, dispatch$3, 'on');
-         },
-         reset: function reset() {
-           var _strings = {};
-           var _colors = {};
+         scale.range = function (_) {
+           return arguments.length ? (range = Array.from(_), rescale()) : range.slice();
+         };
 
-           if (_cache$2) {
-             Object.values(_cache$2.inflightTile).forEach(abortRequest$2); // Strings and colors are static and should not be re-populated
+         scale.rangeRound = function (_) {
+           return range = Array.from(_), interpolate = interpolateRound, rescale();
+         };
 
-             _strings = _cache$2.strings;
-             _colors = _cache$2.colors;
-           }
+         scale.clamp = function (_) {
+           return arguments.length ? (clamp = _ ? true : identity$1, rescale()) : clamp !== identity$1;
+         };
 
-           _cache$2 = {
-             data: {},
-             loadedTile: {},
-             inflightTile: {},
-             inflightPost: {},
-             closed: {},
-             rtree: new RBush(),
-             strings: _strings,
-             colors: _colors
-           };
-         },
-         loadIssues: function loadIssues(projection) {
-           var _this = this;
+         scale.interpolate = function (_) {
+           return arguments.length ? (interpolate = _, rescale()) : interpolate;
+         };
 
-           var params = {
-             // Tiles return a maximum # of issues
-             // So we want to filter our request for only types iD supports
-             item: _osmoseData.items
-           }; // determine the needed tiles to cover the view
+         scale.unknown = function (_) {
+           return arguments.length ? (unknown = _, scale) : unknown;
+         };
 
-           var tiles = tiler$2.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
+         return function (t, u) {
+           transform = t, untransform = u;
+           return rescale();
+         };
+       }
+       function continuous() {
+         return transformer()(identity$1, identity$1);
+       }
 
-           abortUnwantedRequests$2(_cache$2, tiles); // issue new requests..
+       function formatDecimal (x) {
+         return Math.abs(x = Math.round(x)) >= 1e21 ? x.toLocaleString("en").replace(/,/g, "") : x.toString(10);
+       } // Computes the decimal coefficient and exponent of the specified number x with
+       // significant digits p, where x is positive and p is in [1, 21] or undefined.
+       // For example, formatDecimalParts(1.23) returns ["123", 0].
 
-           tiles.forEach(function (tile) {
-             if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
+       function formatDecimalParts(x, p) {
+         if ((i = (x = p ? x.toExponential(p - 1) : x.toExponential()).indexOf("e")) < 0) return null; // NaN, ±Infinity
 
-             var _tile$xyz = _slicedToArray(tile.xyz, 3),
-                 x = _tile$xyz[0],
-                 y = _tile$xyz[1],
-                 z = _tile$xyz[2];
+         var i,
+             coefficient = x.slice(0, i); // The string returned by toExponential either has the form \d\.\d+e[-+]\d+
+         // (e.g., 1.2e+3) or the form \de[-+]\d+ (e.g., 1e+3).
 
-             var url = "".concat(_osmoseUrlRoot, "/issues/").concat(z, "/").concat(x, "/").concat(y, ".json?") + utilQsString(params);
-             var controller = new AbortController();
-             _cache$2.inflightTile[tile.id] = controller;
-             d3_json(url, {
-               signal: controller.signal
-             }).then(function (data) {
-               delete _cache$2.inflightTile[tile.id];
-               _cache$2.loadedTile[tile.id] = true;
+         return [coefficient.length > 1 ? coefficient[0] + coefficient.slice(2) : coefficient, +x.slice(i + 1)];
+       }
 
-               if (data.features) {
-                 data.features.forEach(function (issue) {
-                   var _issue$properties = issue.properties,
-                       item = _issue$properties.item,
-                       cl = _issue$properties["class"],
-                       id = _issue$properties.uuid;
-                   /* Osmose issues are uniquely identified by a unique
-                     `item` and `class` combination (both integer values) */
+       function exponent (x) {
+         return x = formatDecimalParts(Math.abs(x)), x ? x[1] : NaN;
+       }
 
-                   var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
+       function formatGroup (grouping, thousands) {
+         return function (value, width) {
+           var i = value.length,
+               t = [],
+               j = 0,
+               g = grouping[0],
+               length = 0;
 
-                   if (itemType in _osmoseData.icons) {
-                     var loc = issue.geometry.coordinates; // lon, lat
+           while (i > 0 && g > 0) {
+             if (length + g + 1 > width) g = Math.max(1, width - length);
+             t.push(value.substring(i -= g, i + g));
+             if ((length += g + 1) > width) break;
+             g = grouping[j = (j + 1) % grouping.length];
+           }
 
-                     loc = preventCoincident$1(loc);
-                     var d = new QAItem(loc, _this, itemType, id, {
-                       item: item
-                     }); // Setting elems here prevents UI detail requests
+           return t.reverse().join(thousands);
+         };
+       }
 
-                     if (item === 8300 || item === 8360) {
-                       d.elems = [];
-                     }
+       function formatNumerals (numerals) {
+         return function (value) {
+           return value.replace(/[0-9]/g, function (i) {
+             return numerals[+i];
+           });
+         };
+       }
 
-                     _cache$2.data[d.id] = d;
+       // [[fill]align][sign][symbol][0][width][,][.precision][~][type]
+       var re = /^(?:(.)?([<>=^]))?([+\-( ])?([$#])?(0)?(\d+)?(,)?(\.\d+)?(~)?([a-z%])?$/i;
+       function formatSpecifier(specifier) {
+         if (!(match = re.exec(specifier))) throw new Error("invalid format: " + specifier);
+         var match;
+         return new FormatSpecifier({
+           fill: match[1],
+           align: match[2],
+           sign: match[3],
+           symbol: match[4],
+           zero: match[5],
+           width: match[6],
+           comma: match[7],
+           precision: match[8] && match[8].slice(1),
+           trim: match[9],
+           type: match[10]
+         });
+       }
+       formatSpecifier.prototype = FormatSpecifier.prototype; // instanceof
 
-                     _cache$2.rtree.insert(encodeIssueRtree$2(d));
-                   }
-                 });
-               }
+       function FormatSpecifier(specifier) {
+         this.fill = specifier.fill === undefined ? " " : specifier.fill + "";
+         this.align = specifier.align === undefined ? ">" : specifier.align + "";
+         this.sign = specifier.sign === undefined ? "-" : specifier.sign + "";
+         this.symbol = specifier.symbol === undefined ? "" : specifier.symbol + "";
+         this.zero = !!specifier.zero;
+         this.width = specifier.width === undefined ? undefined : +specifier.width;
+         this.comma = !!specifier.comma;
+         this.precision = specifier.precision === undefined ? undefined : +specifier.precision;
+         this.trim = !!specifier.trim;
+         this.type = specifier.type === undefined ? "" : specifier.type + "";
+       }
 
-               dispatch$3.call('loaded');
-             })["catch"](function () {
-               delete _cache$2.inflightTile[tile.id];
-               _cache$2.loadedTile[tile.id] = true;
-             });
-           });
-         },
-         loadIssueDetail: function loadIssueDetail(issue) {
-           var _this2 = this;
+       FormatSpecifier.prototype.toString = function () {
+         return this.fill + this.align + this.sign + this.symbol + (this.zero ? "0" : "") + (this.width === undefined ? "" : Math.max(1, this.width | 0)) + (this.comma ? "," : "") + (this.precision === undefined ? "" : "." + Math.max(0, this.precision | 0)) + (this.trim ? "~" : "") + this.type;
+       };
 
-           // Issue details only need to be fetched once
-           if (issue.elems !== undefined) {
-             return Promise.resolve(issue);
+       // Trims insignificant zeros, e.g., replaces 1.2000k with 1.2k.
+       function formatTrim (s) {
+         out: for (var n = s.length, i = 1, i0 = -1, i1; i < n; ++i) {
+           switch (s[i]) {
+             case ".":
+               i0 = i1 = i;
+               break;
+
+             case "0":
+               if (i0 === 0) i0 = i;
+               i1 = i;
+               break;
+
+             default:
+               if (!+s[i]) break out;
+               if (i0 > 0) i0 = 0;
+               break;
            }
+         }
 
-           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
+         return i0 > 0 ? s.slice(0, i0) + s.slice(i1 + 1) : s;
+       }
 
-           var cacheDetails = function cacheDetails(data) {
-             // Associated elements used for highlighting
-             // Assign directly for immediate use in the callback
-             issue.elems = data.elems.map(function (e) {
-               return e.type.substring(0, 1) + e.id;
-             }); // Some issues have instance specific detail in a subtitle
+       var $$5 = _export;
+       var uncurryThis$3 = functionUncurryThis;
+       var fails$3 = fails$S;
+       var thisNumberValue = thisNumberValue$3;
 
-             issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
+       var un$ToPrecision = uncurryThis$3(1.0.toPrecision);
 
-             _this2.replaceItem(issue);
-           };
+       var FORCED$1 = fails$3(function () {
+         // IE7-
+         return un$ToPrecision(1, undefined) !== '1';
+       }) || !fails$3(function () {
+         // V8 ~ Android 4.3-
+         un$ToPrecision({});
+       });
 
-           return d3_json(url).then(cacheDetails).then(function () {
-             return issue;
-           });
-         },
-         loadStrings: function loadStrings() {
-           var locale = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : _mainLocalizer.localeCode();
-           var items = Object.keys(_osmoseData.icons);
+       // `Number.prototype.toPrecision` method
+       // https://tc39.es/ecma262/#sec-number.prototype.toprecision
+       $$5({ target: 'Number', proto: true, forced: FORCED$1 }, {
+         toPrecision: function toPrecision(precision) {
+           return precision === undefined
+             ? un$ToPrecision(thisNumberValue(this))
+             : un$ToPrecision(thisNumberValue(this), precision);
+         }
+       });
 
-           if (locale in _cache$2.strings && Object.keys(_cache$2.strings[locale]).length === items.length) {
-             return Promise.resolve(_cache$2.strings[locale]);
-           } // May be partially populated already if some requests were successful
+       var prefixExponent;
+       function formatPrefixAuto (x, p) {
+         var d = formatDecimalParts(x, p);
+         if (!d) return x + "";
+         var coefficient = d[0],
+             exponent = d[1],
+             i = exponent - (prefixExponent = Math.max(-8, Math.min(8, Math.floor(exponent / 3))) * 3) + 1,
+             n = coefficient.length;
+         return i === n ? coefficient : i > n ? coefficient + new Array(i - n + 1).join("0") : i > 0 ? coefficient.slice(0, i) + "." + coefficient.slice(i) : "0." + new Array(1 - i).join("0") + formatDecimalParts(x, Math.max(0, p + i - 1))[0]; // less than 1y!
+       }
 
+       function formatRounded (x, p) {
+         var d = formatDecimalParts(x, p);
+         if (!d) return x + "";
+         var coefficient = d[0],
+             exponent = d[1];
+         return exponent < 0 ? "0." + new Array(-exponent).join("0") + coefficient : coefficient.length > exponent + 1 ? coefficient.slice(0, exponent + 1) + "." + coefficient.slice(exponent + 1) : coefficient + new Array(exponent - coefficient.length + 2).join("0");
+       }
 
-           if (!(locale in _cache$2.strings)) {
-             _cache$2.strings[locale] = {};
-           } // Only need to cache strings for supported issue types
-           // Using multiple individual item + class requests to reduce fetched data size
+       var formatTypes = {
+         "%": function _(x, p) {
+           return (x * 100).toFixed(p);
+         },
+         "b": function b(x) {
+           return Math.round(x).toString(2);
+         },
+         "c": function c(x) {
+           return x + "";
+         },
+         "d": formatDecimal,
+         "e": function e(x, p) {
+           return x.toExponential(p);
+         },
+         "f": function f(x, p) {
+           return x.toFixed(p);
+         },
+         "g": function g(x, p) {
+           return x.toPrecision(p);
+         },
+         "o": function o(x) {
+           return Math.round(x).toString(8);
+         },
+         "p": function p(x, _p) {
+           return formatRounded(x * 100, _p);
+         },
+         "r": formatRounded,
+         "s": formatPrefixAuto,
+         "X": function X(x) {
+           return Math.round(x).toString(16).toUpperCase();
+         },
+         "x": function x(_x) {
+           return Math.round(_x).toString(16);
+         }
+       };
 
+       function identity (x) {
+         return x;
+       }
 
-           var allRequests = items.map(function (itemType) {
-             // No need to request data we already have
-             if (itemType in _cache$2.strings[locale]) return null;
+       var map$1 = Array.prototype.map,
+           prefixes = ["y", "z", "a", "f", "p", "n", "µ", "m", "", "k", "M", "G", "T", "P", "E", "Z", "Y"];
+       function formatLocale (locale) {
+         var group = locale.grouping === undefined || locale.thousands === undefined ? identity : formatGroup(map$1.call(locale.grouping, Number), locale.thousands + ""),
+             currencyPrefix = locale.currency === undefined ? "" : locale.currency[0] + "",
+             currencySuffix = locale.currency === undefined ? "" : locale.currency[1] + "",
+             decimal = locale.decimal === undefined ? "." : locale.decimal + "",
+             numerals = locale.numerals === undefined ? identity : formatNumerals(map$1.call(locale.numerals, String)),
+             percent = locale.percent === undefined ? "%" : locale.percent + "",
+             minus = locale.minus === undefined ? "−" : locale.minus + "",
+             nan = locale.nan === undefined ? "NaN" : locale.nan + "";
 
-             var cacheData = function cacheData(data) {
-               // Bunch of nested single value arrays of objects
-               var _data$categories = _slicedToArray(data.categories, 1),
-                   _data$categories$ = _data$categories[0],
-                   cat = _data$categories$ === void 0 ? {
-                 items: []
-               } : _data$categories$;
+         function newFormat(specifier) {
+           specifier = formatSpecifier(specifier);
+           var fill = specifier.fill,
+               align = specifier.align,
+               sign = specifier.sign,
+               symbol = specifier.symbol,
+               zero = specifier.zero,
+               width = specifier.width,
+               comma = specifier.comma,
+               precision = specifier.precision,
+               trim = specifier.trim,
+               type = specifier.type; // The "n" type is an alias for ",g".
 
-               var _cat$items = _slicedToArray(cat.items, 1),
-                   _cat$items$ = _cat$items[0],
-                   item = _cat$items$ === void 0 ? {
-                 "class": []
-               } : _cat$items$;
+           if (type === "n") comma = true, type = "g"; // The "" type, and any invalid type, is an alias for ".12~g".
+           else if (!formatTypes[type]) precision === undefined && (precision = 12), trim = true, type = "g"; // If zero fill is specified, padding goes after sign and before digits.
 
-               var _item$class = _slicedToArray(item["class"], 1),
-                   _item$class$ = _item$class[0],
-                   cl = _item$class$ === void 0 ? null : _item$class$; // If null default value is reached, data wasn't as expected (or was empty)
+           if (zero || fill === "0" && align === "=") zero = true, fill = "0", align = "="; // Compute the prefix and suffix.
+           // For SI-prefix, the suffix is lazily computed.
 
+           var prefix = symbol === "$" ? currencyPrefix : symbol === "#" && /[boxX]/.test(type) ? "0" + type.toLowerCase() : "",
+               suffix = symbol === "$" ? currencySuffix : /[%p]/.test(type) ? percent : ""; // What format function should we use?
+           // Is this an integer type?
+           // Can this type generate exponential notation?
 
-               if (!cl) {
-                 /* eslint-disable no-console */
-                 console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
-                 /* eslint-enable no-console */
+           var formatType = formatTypes[type],
+               maybeSuffix = /[defgprs%]/.test(type); // Set the default precision if not specified,
+           // or clamp the specified precision to the supported range.
+           // For significant precision, it must be in [1, 21].
+           // For fixed precision, it must be in [0, 20].
 
-                 return;
-               } // Cache served item colors to automatically style issue markers later
+           precision = precision === undefined ? 6 : /[gprs]/.test(type) ? Math.max(1, Math.min(21, precision)) : Math.max(0, Math.min(20, precision));
+
+           function format(value) {
+             var valuePrefix = prefix,
+                 valueSuffix = suffix,
+                 i,
+                 n,
+                 c;
 
+             if (type === "c") {
+               valueSuffix = formatType(value) + valueSuffix;
+               value = "";
+             } else {
+               value = +value; // Determine the sign. -0 is not less than 0, but 1 / -0 is!
 
-               var itemInt = item.item,
-                   color = item.color;
+               var valueNegative = value < 0 || 1 / value < 0; // Perform the initial formatting.
 
-               if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
-                 _cache$2.colors[itemInt] = color;
-               } // Value of root key will be null if no string exists
-               // If string exists, value is an object with key 'auto' for string
+               value = isNaN(value) ? nan : formatType(Math.abs(value), precision); // Trim insignificant zeros.
 
+               if (trim) value = formatTrim(value); // If a negative value rounds to zero after formatting, and no explicit positive sign is requested, hide the sign.
 
-               var title = cl.title,
-                   detail = cl.detail,
-                   fix = cl.fix,
-                   trap = cl.trap; // Osmose titles shouldn't contain markdown
+               if (valueNegative && +value === 0 && sign !== "+") valueNegative = false; // Compute the prefix and suffix.
 
-               var issueStrings = {};
-               if (title) issueStrings.title = title.auto;
-               if (detail) issueStrings.detail = marked_1(detail.auto);
-               if (trap) issueStrings.trap = marked_1(trap.auto);
-               if (fix) issueStrings.fix = marked_1(fix.auto);
-               _cache$2.strings[locale][itemType] = issueStrings;
-             };
+               valuePrefix = (valueNegative ? sign === "(" ? sign : minus : sign === "-" || sign === "(" ? "" : sign) + valuePrefix;
+               valueSuffix = (type === "s" ? prefixes[8 + prefixExponent / 3] : "") + valueSuffix + (valueNegative && sign === "(" ? ")" : ""); // Break the formatted value into the integer “value” part that can be
+               // grouped, and fractional or exponential “suffix” part that is not.
 
-             var _itemType$split = itemType.split('-'),
-                 _itemType$split2 = _slicedToArray(_itemType$split, 2),
-                 item = _itemType$split2[0],
-                 cl = _itemType$split2[1]; // Osmose API falls back to English strings where untranslated or if locale doesn't exist
+               if (maybeSuffix) {
+                 i = -1, n = value.length;
 
+                 while (++i < n) {
+                   if (c = value.charCodeAt(i), 48 > c || c > 57) {
+                     valueSuffix = (c === 46 ? decimal + value.slice(i + 1) : value.slice(i)) + valueSuffix;
+                     value = value.slice(0, i);
+                     break;
+                   }
+                 }
+               }
+             } // If the fill character is not "0", grouping is applied before padding.
 
-             var url = "".concat(_osmoseUrlRoot, "/items/").concat(item, "/class/").concat(cl, "?langs=").concat(locale);
-             return d3_json(url).then(cacheData);
-           }).filter(Boolean);
-           return Promise.all(allRequests).then(function () {
-             return _cache$2.strings[locale];
-           });
-         },
-         getStrings: function getStrings(itemType) {
-           var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : _mainLocalizer.localeCode();
-           // No need to fallback to English, Osmose API handles this for us
-           return locale in _cache$2.strings ? _cache$2.strings[locale][itemType] : {};
-         },
-         getColor: function getColor(itemType) {
-           return itemType in _cache$2.colors ? _cache$2.colors[itemType] : '#FFFFFF';
-         },
-         postUpdate: function postUpdate(issue, callback) {
-           var _this3 = this;
 
-           if (_cache$2.inflightPost[issue.id]) {
-             return callback({
-               message: 'Issue update already inflight',
-               status: -2
-             }, issue);
-           } // UI sets the status to either 'done' or 'false'
+             if (comma && !zero) value = group(value, Infinity); // Compute the padding.
 
+             var length = valuePrefix.length + value.length + valueSuffix.length,
+                 padding = length < width ? new Array(width - length + 1).join(fill) : ""; // If the fill character is "0", grouping is applied after padding.
 
-           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
-           var controller = new AbortController();
+             if (comma && zero) value = group(padding + value, padding.length ? width - valueSuffix.length : Infinity), padding = ""; // Reconstruct the final output based on the desired alignment.
 
-           var after = function after() {
-             delete _cache$2.inflightPost[issue.id];
+             switch (align) {
+               case "<":
+                 value = valuePrefix + value + valueSuffix + padding;
+                 break;
 
-             _this3.removeItem(issue);
+               case "=":
+                 value = valuePrefix + padding + value + valueSuffix;
+                 break;
 
-             if (issue.newStatus === 'done') {
-               // Keep track of the number of issues closed per `item` to tag the changeset
-               if (!(issue.item in _cache$2.closed)) {
-                 _cache$2.closed[issue.item] = 0;
-               }
+               case "^":
+                 value = padding.slice(0, length = padding.length >> 1) + valuePrefix + value + valueSuffix + padding.slice(length);
+                 break;
 
-               _cache$2.closed[issue.item] += 1;
+               default:
+                 value = padding + valuePrefix + value + valueSuffix;
+                 break;
              }
 
-             if (callback) callback(null, issue);
-           };
+             return numerals(value);
+           }
 
-           _cache$2.inflightPost[issue.id] = controller;
-           fetch(url, {
-             signal: controller.signal
-           }).then(after)["catch"](function (err) {
-             delete _cache$2.inflightPost[issue.id];
-             if (callback) callback(err.message);
-           });
-         },
-         // Get all cached QAItems covering the viewport
-         getItems: function getItems(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-           return _cache$2.rtree.search(bbox).map(function (d) {
-             return d.data;
-           });
-         },
-         // Get a QAItem from cache
-         // NOTE: Don't change method name until UI v3 is merged
-         getError: function getError(id) {
-           return _cache$2.data[id];
-         },
-         // get the name of the icon to display for this item
-         getIcon: function getIcon(itemType) {
-           return _osmoseData.icons[itemType];
-         },
-         // Replace a single QAItem in the cache
-         replaceItem: function replaceItem(item) {
-           if (!(item instanceof QAItem) || !item.id) return;
-           _cache$2.data[item.id] = item;
-           updateRtree$2(encodeIssueRtree$2(item), true); // true = replace
+           format.toString = function () {
+             return specifier + "";
+           };
 
-           return item;
-         },
-         // Remove a single QAItem from the cache
-         removeItem: function removeItem(item) {
-           if (!(item instanceof QAItem) || !item.id) return;
-           delete _cache$2.data[item.id];
-           updateRtree$2(encodeIssueRtree$2(item), false); // false = remove
-         },
-         // Used to populate `closed:osmose:*` changeset tags
-         getClosedCounts: function getClosedCounts() {
-           return _cache$2.closed;
-         },
-         itemURL: function itemURL(item) {
-           return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
+           return format;
          }
-       };
 
-       var apibase = 'https://a.mapillary.com/v3/';
-       var viewercss = 'mapillary-js/mapillary.min.css';
-       var viewerjs = 'mapillary-js/mapillary.min.js';
-       var clientId = 'NzNRM2otQkR2SHJzaXJmNmdQWVQ0dzo1ZWYyMmYwNjdmNDdlNmVi';
-       var mapFeatureConfig = {
-         values: ['construction--flat--crosswalk-plain', 'marking--discrete--crosswalk-zebra', 'object--banner', 'object--bench', 'object--bike-rack', 'object--billboard', 'object--catch-basin', 'object--cctv-camera', 'object--fire-hydrant', 'object--mailbox', 'object--manhole', 'object--phone-booth', 'object--sign--advertisement', 'object--sign--information', 'object--sign--store', 'object--street-light', 'object--support--utility-pole', 'object--traffic-light--*', 'object--traffic-light--pedestrians', 'object--trash-can'].join(',')
-       };
-       var maxResults = 1000;
-       var tileZoom = 14;
-       var tiler$3 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
-       var dispatch$4 = dispatch('change', 'loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged', 'nodeChanged');
-       var _mlyFallback = false;
+         function formatPrefix(specifier, value) {
+           var f = newFormat((specifier = formatSpecifier(specifier), specifier.type = "f", specifier)),
+               e = Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3,
+               k = Math.pow(10, -e),
+               prefix = prefixes[8 + e / 3];
+           return function (value) {
+             return f(k * value) + prefix;
+           };
+         }
 
-       var _mlyCache;
+         return {
+           format: newFormat,
+           formatPrefix: formatPrefix
+         };
+       }
 
-       var _mlyClicks;
+       var locale;
+       var format$1;
+       var formatPrefix;
+       defaultLocale({
+         thousands: ",",
+         grouping: [3],
+         currency: ["$", ""]
+       });
+       function defaultLocale(definition) {
+         locale = formatLocale(definition);
+         format$1 = locale.format;
+         formatPrefix = locale.formatPrefix;
+         return locale;
+       }
 
-       var _mlyActiveImage;
+       function precisionFixed (step) {
+         return Math.max(0, -exponent(Math.abs(step)));
+       }
 
-       var _mlySelectedImageKey;
+       function precisionPrefix (step, value) {
+         return Math.max(0, Math.max(-8, Math.min(8, Math.floor(exponent(value) / 3))) * 3 - exponent(Math.abs(step)));
+       }
 
-       var _mlyViewer;
+       function precisionRound (step, max) {
+         step = Math.abs(step), max = Math.abs(max) - step;
+         return Math.max(0, exponent(max) - exponent(step)) + 1;
+       }
 
-       var _mlyViewerFilter = ['all'];
+       function tickFormat(start, stop, count, specifier) {
+         var step = tickStep(start, stop, count),
+             precision;
+         specifier = formatSpecifier(specifier == null ? ",f" : specifier);
 
-       var _loadViewerPromise;
+         switch (specifier.type) {
+           case "s":
+             {
+               var value = Math.max(Math.abs(start), Math.abs(stop));
+               if (specifier.precision == null && !isNaN(precision = precisionPrefix(step, value))) specifier.precision = precision;
+               return formatPrefix(specifier, value);
+             }
 
-       var _mlyHighlightedDetection;
+           case "":
+           case "e":
+           case "g":
+           case "p":
+           case "r":
+             {
+               if (specifier.precision == null && !isNaN(precision = precisionRound(step, Math.max(Math.abs(start), Math.abs(stop))))) specifier.precision = precision - (specifier.type === "e");
+               break;
+             }
 
-       var _mlyShowFeatureDetections = false;
-       var _mlyShowSignDetections = false;
+           case "f":
+           case "%":
+             {
+               if (specifier.precision == null && !isNaN(precision = precisionFixed(step))) specifier.precision = precision - (specifier.type === "%") * 2;
+               break;
+             }
+         }
 
-       function abortRequest$3(controller) {
-         controller.abort();
+         return format$1(specifier);
        }
 
-       function loadTiles(which, url, projection) {
-         var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-         var tiles = tiler$3.getTiles(projection); // abort inflight requests that are no longer needed
-
-         var cache = _mlyCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k.indexOf(tile.id + ',') === 0;
-           });
-
-           if (!wanted) {
-             abortRequest$3(cache.inflight[k]);
-             delete cache.inflight[k];
-           }
-         });
-         tiles.forEach(function (tile) {
-           loadNextTilePage(which, currZoom, url, tile);
-         });
-       }
+       function linearish(scale) {
+         var domain = scale.domain;
 
-       function loadNextTilePage(which, currZoom, url, tile) {
-         var cache = _mlyCache[which];
-         var rect = tile.extent.rectangle();
-         var maxPages = maxPageAtZoom(currZoom);
-         var nextPage = cache.nextPage[tile.id] || 0;
-         var nextURL = cache.nextURL[tile.id] || url + utilQsString({
-           per_page: maxResults,
-           page: nextPage,
-           client_id: clientId,
-           bbox: [rect[0], rect[1], rect[2], rect[3]].join(',')
-         });
-         if (nextPage > maxPages) return;
-         var id = tile.id + ',' + String(nextPage);
-         if (cache.loaded[id] || cache.inflight[id]) return;
-         var controller = new AbortController();
-         cache.inflight[id] = controller;
-         var options = {
-           method: 'GET',
-           signal: controller.signal,
-           headers: {
-             'Content-Type': 'application/json'
-           }
+         scale.ticks = function (count) {
+           var d = domain();
+           return ticks(d[0], d[d.length - 1], count == null ? 10 : count);
          };
-         fetch(nextURL, options).then(function (response) {
-           if (!response.ok) {
-             throw new Error(response.status + ' ' + response.statusText);
-           }
-
-           var linkHeader = response.headers.get('Link');
 
-           if (linkHeader) {
-             var pagination = parsePagination(linkHeader);
-
-             if (pagination.next) {
-               cache.nextURL[tile.id] = pagination.next;
-             }
-           }
+         scale.tickFormat = function (count, specifier) {
+           var d = domain();
+           return tickFormat(d[0], d[d.length - 1], count == null ? 10 : count, specifier);
+         };
 
-           return response.json();
-         }).then(function (data) {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
+         scale.nice = function (count) {
+           if (count == null) count = 10;
+           var d = domain();
+           var i0 = 0;
+           var i1 = d.length - 1;
+           var start = d[i0];
+           var stop = d[i1];
+           var prestep;
+           var step;
+           var maxIter = 10;
 
-           if (!data || !data.features || !data.features.length) {
-             throw new Error('No Data');
+           if (stop < start) {
+             step = start, start = stop, stop = step;
+             step = i0, i0 = i1, i1 = step;
            }
 
-           var features = data.features.map(function (feature) {
-             var loc = feature.geometry.coordinates;
-             var d; // An image (shown as a green dot on the map) is a single street photo with extra
-             // information such as location, camera angle (CA), camera model, and so on.
-             // Each image feature is a GeoJSON Point
+           while (maxIter-- > 0) {
+             step = tickIncrement(start, stop, count);
 
-             if (which === 'images') {
-               d = {
-                 loc: loc,
-                 key: feature.properties.key,
-                 ca: feature.properties.ca,
-                 captured_at: feature.properties.captured_at,
-                 captured_by: feature.properties.username,
-                 pano: feature.properties.pano
-               };
-               cache.forImageKey[d.key] = d; // cache imageKey -> image
-               // Mapillary organizes images as sequences. A sequence of images are continuously captured
-               // by a user at a give time. Sequences are shown on the map as green lines.
-               // Each sequence feature is a GeoJSON LineString
-             } else if (which === 'sequences') {
-               var sequenceKey = feature.properties.key;
-               cache.lineString[sequenceKey] = feature; // cache sequenceKey -> lineString
-
-               feature.properties.coordinateProperties.image_keys.forEach(function (imageKey) {
-                 cache.forImageKey[imageKey] = sequenceKey; // cache imageKey -> sequenceKey
-               });
-               return false; // because no `d` data worth loading into an rbush
-               // A map feature is a real world object that can be shown on a map. It could be any object
-               // recognized from images, manually added in images, or added on the map.
-               // Each map feature is a GeoJSON Point (located where the feature is)
-             } else if (which === 'map_features' || which === 'points') {
-               d = {
-                 loc: loc,
-                 key: feature.properties.key,
-                 value: feature.properties.value,
-                 detections: feature.properties.detections,
-                 direction: feature.properties.direction,
-                 accuracy: feature.properties.accuracy,
-                 first_seen_at: feature.properties.first_seen_at,
-                 last_seen_at: feature.properties.last_seen_at
-               };
+             if (step === prestep) {
+               d[i0] = start;
+               d[i1] = stop;
+               return domain(d);
+             } else if (step > 0) {
+               start = Math.floor(start / step) * step;
+               stop = Math.ceil(stop / step) * step;
+             } else if (step < 0) {
+               start = Math.ceil(start * step) / step;
+               stop = Math.floor(stop * step) / step;
+             } else {
+               break;
              }
 
-             return {
-               minX: loc[0],
-               minY: loc[1],
-               maxX: loc[0],
-               maxY: loc[1],
-               data: d
-             };
-           }).filter(Boolean);
-
-           if (cache.rtree && features) {
-             cache.rtree.load(features);
+             prestep = step;
            }
 
-           if (data.features.length === maxResults) {
-             // more pages to load
-             cache.nextPage[tile.id] = nextPage + 1;
-             loadNextTilePage(which, currZoom, url, tile);
-           } else {
-             cache.nextPage[tile.id] = Infinity; // no more pages to load
-           }
+           return scale;
+         };
 
-           if (which === 'images' || which === 'sequences') {
-             dispatch$4.call('loadedImages');
-           } else if (which === 'map_features') {
-             dispatch$4.call('loadedSigns');
-           } else if (which === 'points') {
-             dispatch$4.call('loadedMapFeatures');
-           }
-         })["catch"](function () {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
-         });
+         return scale;
        }
+       function linear() {
+         var scale = continuous();
 
-       function loadData(which, url) {
-         var cache = _mlyCache[which];
-         var options = {
-           method: 'GET',
-           headers: {
-             'Content-Type': 'application/json'
-           }
+         scale.copy = function () {
+           return copy(scale, linear());
          };
-         var nextUrl = url + '&client_id=' + clientId;
-         return fetch(nextUrl, options).then(function (response) {
-           if (!response.ok) {
-             throw new Error(response.status + ' ' + response.statusText);
-           }
-
-           return response.json();
-         }).then(function (data) {
-           if (!data || !data.features || !data.features.length) {
-             throw new Error('No Data');
-           }
-
-           data.features.forEach(function (feature) {
-             var d;
-
-             if (which === 'image_detections') {
-               d = {
-                 key: feature.properties.key,
-                 image_key: feature.properties.image_key,
-                 value: feature.properties.value,
-                 shape: feature.properties.shape
-               };
-
-               if (!cache.forImageKey[d.image_key]) {
-                 cache.forImageKey[d.image_key] = [];
-               }
 
-               cache.forImageKey[d.image_key].push(d);
-             }
-           });
-         });
+         initRange.apply(scale, arguments);
+         return linearish(scale);
        }
 
-       function maxPageAtZoom(z) {
-         if (z < 15) return 2;
-         if (z === 15) return 5;
-         if (z === 16) return 10;
-         if (z === 17) return 20;
-         if (z === 18) return 40;
-         if (z > 18) return 80;
-       } // extract links to pages of API results
-
-
-       function parsePagination(links) {
-         return links.split(',').map(function (rel) {
-           var elements = rel.split(';');
+       // eslint-disable-next-line es/no-math-expm1 -- safe
+       var $expm1 = Math.expm1;
+       var exp$1 = Math.exp;
 
-           if (elements.length === 2) {
-             return [/<(.+)>/.exec(elements[0])[1], /rel="(.+)"/.exec(elements[1])[1]];
-           } else {
-             return ['', ''];
-           }
-         }).reduce(function (pagination, val) {
-           pagination[val[1]] = val[0];
-           return pagination;
-         }, {});
-       } // partition viewport into higher zoom tiles
+       // `Math.expm1` method implementation
+       // https://tc39.es/ecma262/#sec-math.expm1
+       var mathExpm1 = (!$expm1
+         // Old FF bug
+         || $expm1(10) > 22025.465794806719 || $expm1(10) < 22025.4657948067165168
+         // Tor Browser bug
+         || $expm1(-2e-17) != -2e-17
+       ) ? function expm1(x) {
+         return (x = +x) == 0 ? x : x > -1e-6 && x < 1e-6 ? x + x * x / 2 : exp$1(x) - 1;
+       } : $expm1;
 
+       function quantize() {
+         var x0 = 0,
+             x1 = 1,
+             n = 1,
+             domain = [0.5],
+             range = [0, 1],
+             unknown;
 
-       function partitionViewport(projection) {
-         var z = geoScaleToZoom(projection.scale());
-         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
+         function scale(x) {
+           return x != null && x <= x ? range[bisectRight(domain, x, 0, n)] : unknown;
+         }
 
-         var tiler = utilTiler().zoomExtent([z2, z2]);
-         return tiler.getTiles(projection).map(function (tile) {
-           return tile.extent;
-         });
-       } // no more than `limit` results per partition.
+         function rescale() {
+           var i = -1;
+           domain = new Array(n);
 
+           while (++i < n) {
+             domain[i] = ((i + 1) * x1 - (i - n) * x0) / (n + 1);
+           }
 
-       function searchLimited(limit, projection, rtree) {
-         limit = limit || 5;
-         return partitionViewport(projection).reduce(function (result, extent) {
-           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
-             return d.data;
-           });
-           return found.length ? result.concat(found) : result;
-         }, []);
-       }
+           return scale;
+         }
 
-       var serviceMapillary = {
-         init: function init() {
-           if (!_mlyCache) {
-             this.reset();
-           }
+         scale.domain = function (_) {
+           var _ref, _ref2;
 
-           this.event = utilRebind(this, dispatch$4, 'on');
-         },
-         reset: function reset() {
-           if (_mlyCache) {
-             Object.values(_mlyCache.images.inflight).forEach(abortRequest$3);
-             Object.values(_mlyCache.image_detections.inflight).forEach(abortRequest$3);
-             Object.values(_mlyCache.map_features.inflight).forEach(abortRequest$3);
-             Object.values(_mlyCache.points.inflight).forEach(abortRequest$3);
-             Object.values(_mlyCache.sequences.inflight).forEach(abortRequest$3);
-           }
+           return arguments.length ? ((_ref = _, _ref2 = _slicedToArray(_ref, 2), x0 = _ref2[0], x1 = _ref2[1], _ref), x0 = +x0, x1 = +x1, rescale()) : [x0, x1];
+         };
 
-           _mlyCache = {
-             images: {
-               inflight: {},
-               loaded: {},
-               nextPage: {},
-               nextURL: {},
-               rtree: new RBush(),
-               forImageKey: {}
-             },
-             image_detections: {
-               inflight: {},
-               loaded: {},
-               nextPage: {},
-               nextURL: {},
-               forImageKey: {}
-             },
-             map_features: {
-               inflight: {},
-               loaded: {},
-               nextPage: {},
-               nextURL: {},
-               rtree: new RBush()
-             },
-             points: {
-               inflight: {},
-               loaded: {},
-               nextPage: {},
-               nextURL: {},
-               rtree: new RBush()
-             },
-             sequences: {
-               inflight: {},
-               loaded: {},
-               nextPage: {},
-               nextURL: {},
-               rtree: new RBush(),
-               forImageKey: {},
-               lineString: {}
-             }
-           };
-           _mlySelectedImageKey = null;
-           _mlyActiveImage = null;
-           _mlyClicks = [];
-         },
-         images: function images(projection) {
-           var limit = 5;
-           return searchLimited(limit, projection, _mlyCache.images.rtree);
-         },
-         signs: function signs(projection) {
-           var limit = 5;
-           return searchLimited(limit, projection, _mlyCache.map_features.rtree);
-         },
-         mapFeatures: function mapFeatures(projection) {
-           var limit = 5;
-           return searchLimited(limit, projection, _mlyCache.points.rtree);
-         },
-         cachedImage: function cachedImage(imageKey) {
-           return _mlyCache.images.forImageKey[imageKey];
-         },
-         sequences: function sequences(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-           var sequenceKeys = {}; // all sequences for images in viewport
+         scale.range = function (_) {
+           return arguments.length ? (n = (range = Array.from(_)).length - 1, rescale()) : range.slice();
+         };
 
-           _mlyCache.images.rtree.search(bbox).forEach(function (d) {
-             var sequenceKey = _mlyCache.sequences.forImageKey[d.data.key];
+         scale.invertExtent = function (y) {
+           var i = range.indexOf(y);
+           return i < 0 ? [NaN, NaN] : i < 1 ? [x0, domain[0]] : i >= n ? [domain[n - 1], x1] : [domain[i - 1], domain[i]];
+         };
 
-             if (sequenceKey) {
-               sequenceKeys[sequenceKey] = true;
-             }
-           }); // Return lineStrings for the sequences
+         scale.unknown = function (_) {
+           return arguments.length ? (unknown = _, scale) : scale;
+         };
 
+         scale.thresholds = function () {
+           return domain.slice();
+         };
 
-           return Object.keys(sequenceKeys).map(function (sequenceKey) {
-             return _mlyCache.sequences.lineString[sequenceKey];
-           });
-         },
-         signsSupported: function signsSupported() {
-           return true;
-         },
-         loadImages: function loadImages(projection) {
-           loadTiles('images', apibase + 'images?sort_by=key&', projection);
-           loadTiles('sequences', apibase + 'sequences?sort_by=key&', projection);
-         },
-         loadSigns: function loadSigns(projection) {
-           loadTiles('map_features', apibase + 'map_features?layers=trafficsigns&min_nbr_image_detections=2&sort_by=key&', projection);
-         },
-         loadMapFeatures: function loadMapFeatures(projection) {
-           loadTiles('points', apibase + 'map_features?layers=points&min_nbr_image_detections=2&sort_by=key&values=' + mapFeatureConfig.values + '&', projection);
-         },
-         ensureViewerLoaded: function ensureViewerLoaded(context) {
-           if (_loadViewerPromise) return _loadViewerPromise; // add mly-wrapper
+         scale.copy = function () {
+           return quantize().domain([x0, x1]).range(range).unknown(unknown);
+         };
 
-           var wrap = context.container().select('.photoviewer').selectAll('.mly-wrapper').data([0]);
-           wrap.enter().append('div').attr('id', 'ideditor-mly').attr('class', 'photo-wrapper mly-wrapper').classed('hide', true);
-           var that = this;
-           _loadViewerPromise = new Promise(function (resolve, reject) {
-             var loadedCount = 0;
+         return initRange.apply(linearish(scale), arguments);
+       }
 
-             function loaded() {
-               loadedCount += 1; // wait until both files are loaded
+       var global$3 = global$1m;
+       var uncurryThis$2 = functionUncurryThis;
+       var fails$2 = fails$S;
+       var padStart = stringPad.start;
 
-               if (loadedCount === 2) resolve();
-             }
+       var RangeError$2 = global$3.RangeError;
+       var abs$1 = Math.abs;
+       var DatePrototype = Date.prototype;
+       var n$DateToISOString = DatePrototype.toISOString;
+       var getTime = uncurryThis$2(DatePrototype.getTime);
+       var getUTCDate = uncurryThis$2(DatePrototype.getUTCDate);
+       var getUTCFullYear = uncurryThis$2(DatePrototype.getUTCFullYear);
+       var getUTCHours = uncurryThis$2(DatePrototype.getUTCHours);
+       var getUTCMilliseconds = uncurryThis$2(DatePrototype.getUTCMilliseconds);
+       var getUTCMinutes = uncurryThis$2(DatePrototype.getUTCMinutes);
+       var getUTCMonth = uncurryThis$2(DatePrototype.getUTCMonth);
+       var getUTCSeconds = uncurryThis$2(DatePrototype.getUTCSeconds);
 
-             var head = select('head'); // load mapillary-viewercss
+       // `Date.prototype.toISOString` method implementation
+       // https://tc39.es/ecma262/#sec-date.prototype.toisostring
+       // PhantomJS / old WebKit fails here:
+       var dateToIsoString = (fails$2(function () {
+         return n$DateToISOString.call(new Date(-5e13 - 1)) != '0385-07-25T07:06:39.999Z';
+       }) || !fails$2(function () {
+         n$DateToISOString.call(new Date(NaN));
+       })) ? function toISOString() {
+         if (!isFinite(getTime(this))) throw RangeError$2('Invalid time value');
+         var date = this;
+         var year = getUTCFullYear(date);
+         var milliseconds = getUTCMilliseconds(date);
+         var sign = year < 0 ? '-' : year > 9999 ? '+' : '';
+         return sign + padStart(abs$1(year), sign ? 6 : 4, 0) +
+           '-' + padStart(getUTCMonth(date) + 1, 2, 0) +
+           '-' + padStart(getUTCDate(date), 2, 0) +
+           'T' + padStart(getUTCHours(date), 2, 0) +
+           ':' + padStart(getUTCMinutes(date), 2, 0) +
+           ':' + padStart(getUTCSeconds(date), 2, 0) +
+           '.' + padStart(milliseconds, 3, 0) +
+           'Z';
+       } : n$DateToISOString;
 
-             head.selectAll('#ideditor-mapillary-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-mapillary-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(viewercss)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
-               reject();
-             }); // load mapillary-viewerjs
+       var $$4 = _export;
+       var toISOString = dateToIsoString;
 
-             head.selectAll('#ideditor-mapillary-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-mapillary-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(viewerjs)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
-               reject();
-             });
-           })["catch"](function () {
-             _loadViewerPromise = null;
-           }).then(function () {
-             that.initViewer(context);
-           });
-           return _loadViewerPromise;
-         },
-         loadSignResources: function loadSignResources(context) {
-           context.ui().svgDefs.addSprites(['mapillary-sprite'], false
-           /* don't override colors */
-           );
-           return this;
-         },
-         loadObjectResources: function loadObjectResources(context) {
-           context.ui().svgDefs.addSprites(['mapillary-object-sprite'], false
-           /* don't override colors */
-           );
-           return this;
-         },
-         resetTags: function resetTags() {
-           if (_mlyViewer && !_mlyFallback) {
-             _mlyViewer.getComponent('tag').removeAll(); // remove previous detections
+       // `Date.prototype.toISOString` method
+       // https://tc39.es/ecma262/#sec-date.prototype.toisostring
+       // PhantomJS / old WebKit has a broken implementations
+       $$4({ target: 'Date', proto: true, forced: Date.prototype.toISOString !== toISOString }, {
+         toISOString: toISOString
+       });
 
-           }
-         },
-         showFeatureDetections: function showFeatureDetections(value) {
-           _mlyShowFeatureDetections = value;
+       function behaviorBreathe() {
+         var duration = 800;
+         var steps = 4;
+         var selector = '.selected.shadow, .selected .shadow';
 
-           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
-             this.resetTags();
-           }
-         },
-         showSignDetections: function showSignDetections(value) {
-           _mlyShowSignDetections = value;
+         var _selected = select(null);
 
-           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
-             this.resetTags();
-           }
-         },
-         filterViewer: function filterViewer(context) {
-           var showsPano = context.photos().showsPanoramic();
-           var showsFlat = context.photos().showsFlat();
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
-           var filter = ['all'];
-           if (!showsPano) filter.push(['==', 'pano', false]);
-           if (!showsFlat && showsPano) filter.push(['==', 'pano', true]);
-           if (usernames && usernames.length) filter.push(['==', 'username', usernames[0]]);
+         var _classed = '';
+         var _params = {};
+         var _done = false;
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             filter.push(['>=', 'capturedAt', fromTimestamp]);
-           }
+         var _timer;
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             filter.push(['>=', 'capturedAt', toTimestamp]);
-           }
+         function ratchetyInterpolator(a, b, steps, units) {
+           a = parseFloat(a);
+           b = parseFloat(b);
+           var sample = quantize().domain([0, 1]).range(d3_quantize(d3_interpolateNumber(a, b), steps));
+           return function (t) {
+             return String(sample(t)) + (units || '');
+           };
+         }
 
-           if (_mlyViewer) {
-             _mlyViewer.setFilter(filter);
-           }
+         function reset(selection) {
+           selection.style('stroke-opacity', null).style('stroke-width', null).style('fill-opacity', null).style('r', null);
+         }
 
-           _mlyViewerFilter = filter;
-           return filter;
-         },
-         showViewer: function showViewer(context) {
-           var wrap = context.container().select('.photoviewer').classed('hide', false);
-           var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
+         function setAnimationParams(transition, fromTo) {
+           var toFrom = fromTo === 'from' ? 'to' : 'from';
+           transition.styleTween('stroke-opacity', function (d) {
+             return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+           }).styleTween('stroke-width', function (d) {
+             return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+           }).styleTween('fill-opacity', function (d) {
+             return ratchetyInterpolator(_params[d.id][toFrom].opacity, _params[d.id][fromTo].opacity, steps);
+           }).styleTween('r', function (d) {
+             return ratchetyInterpolator(_params[d.id][toFrom].width, _params[d.id][fromTo].width, steps, 'px');
+           });
+         }
 
-           if (isHidden && _mlyViewer) {
-             wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
-             wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
+         function calcAnimationParams(selection) {
+           selection.call(reset).each(function (d) {
+             var s = select(this);
+             var tag = s.node().tagName;
+             var p = {
+               'from': {},
+               'to': {}
+             };
+             var opacity;
+             var width; // determine base opacity and width
 
-             _mlyViewer.resize();
-           }
+             if (tag === 'circle') {
+               opacity = parseFloat(s.style('fill-opacity') || 0.5);
+               width = parseFloat(s.style('r') || 15.5);
+             } else {
+               opacity = parseFloat(s.style('stroke-opacity') || 0.7);
+               width = parseFloat(s.style('stroke-width') || 10);
+             } // calculate from/to interpolation params..
 
-           return this;
-         },
-         hideViewer: function hideViewer(context) {
-           _mlyActiveImage = null;
-           _mlySelectedImageKey = null;
 
-           if (!_mlyFallback && _mlyViewer) {
-             _mlyViewer.getComponent('sequence').stop();
-           }
+             p.tag = tag;
+             p.from.opacity = opacity * 0.6;
+             p.to.opacity = opacity * 1.25;
+             p.from.width = width * 0.7;
+             p.to.width = width * (tag === 'circle' ? 1.5 : 1);
+             _params[d.id] = p;
+           });
+         }
 
-           var viewer = context.container().select('.photoviewer');
-           if (!viewer.empty()) viewer.datum(null);
-           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
-           this.updateUrlImage(null);
-           dispatch$4.call('nodeChanged');
-           return this.setStyles(context, null, true);
-         },
-         parsePagination: parsePagination,
-         updateUrlImage: function updateUrlImage(imageKey) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
+         function run(surface, fromTo) {
+           var toFrom = fromTo === 'from' ? 'to' : 'from';
+           var currSelected = surface.selectAll(selector);
+           var currClassed = surface.attr('class');
 
-             if (imageKey) {
-               hash.photo = 'mapillary/' + imageKey;
-             } else {
-               delete hash.photo;
-             }
+           if (_done || currSelected.empty()) {
+             _selected.call(reset);
 
-             window.location.replace('#' + utilQsString(hash, true));
-           }
-         },
-         highlightDetection: function highlightDetection(detection) {
-           if (detection) {
-             _mlyHighlightedDetection = detection.detection_key;
+             _selected = select(null);
+             return;
            }
 
-           return this;
-         },
-         initViewer: function initViewer(context) {
-           var that = this;
-           if (!window.Mapillary) return;
-           var opts = {
-             baseImageSize: 320,
-             component: {
-               cover: false,
-               keyboard: false,
-               tag: true
-             }
-           }; // Disable components requiring WebGL support
-
-           if (!Mapillary.isSupported() && Mapillary.isFallbackSupported()) {
-             _mlyFallback = true;
-             opts.component = {
-               cover: false,
-               direction: false,
-               imagePlane: false,
-               keyboard: false,
-               mouse: false,
-               sequence: false,
-               tag: false,
-               image: true,
-               // fallback
-               navigation: true // fallback
+           if (!fastDeepEqual(currSelected.data(), _selected.data()) || currClassed !== _classed) {
+             _selected.call(reset);
 
-             };
+             _classed = currClassed;
+             _selected = currSelected.call(calcAnimationParams);
            }
 
-           _mlyViewer = new Mapillary.Viewer('ideditor-mly', clientId, null, opts);
+           var didCallNextRun = false;
 
-           _mlyViewer.on('nodechanged', nodeChanged);
+           _selected.transition().duration(duration).call(setAnimationParams, fromTo).on('end', function () {
+             // `end` event is called for each selected element, but we want
+             // it to run only once
+             if (!didCallNextRun) {
+               surface.call(run, toFrom);
+               didCallNextRun = true;
+             } // if entity was deselected, remove breathe styling
 
-           _mlyViewer.on('bearingchanged', bearingChanged);
 
-           if (_mlyViewerFilter) {
-             _mlyViewer.setFilter(_mlyViewerFilter);
-           } // Register viewer resize handler
+             if (!select(this).classed('selected')) {
+               reset(select(this));
+             }
+           });
+         }
 
+         function behavior(surface) {
+           _done = false;
+           _timer = timer(function () {
+             // wait for elements to actually become selected
+             if (surface.selectAll(selector).empty()) {
+               return false;
+             }
 
-           context.ui().photoviewer.on('resize.mapillary', function () {
-             if (_mlyViewer) _mlyViewer.resize();
-           }); // nodeChanged: called after the viewer has changed images and is ready.
-           //
-           // There is some logic here to batch up clicks into a _mlyClicks array
-           // because the user might click on a lot of markers quickly and nodechanged
-           // may be called out of order asynchronously.
-           //
-           // Clicks are added to the array in `selectedImage` and removed here.
-           //
+             surface.call(run, 'from');
 
-           function nodeChanged(node) {
-             that.resetTags();
-             var clicks = _mlyClicks;
-             var index = clicks.indexOf(node.key);
-             var selectedKey = _mlySelectedImageKey;
-             that.setActiveImage(node);
+             _timer.stop();
 
-             if (index > -1) {
-               // `nodechanged` initiated from clicking on a marker..
-               clicks.splice(index, 1); // remove the click
-               // If `node.key` matches the current _mlySelectedImageKey, call `selectImage()`
-               // one more time to update the detections and attribution..
+             return true;
+           }, 20);
+         }
 
-               if (node.key === selectedKey) {
-                 that.selectImage(context, _mlySelectedImageKey, true);
-               }
-             } else {
-               // `nodechanged` initiated from the Mapillary viewer controls..
-               var loc = node.computedLatLon ? [node.computedLatLon.lon, node.computedLatLon.lat] : [node.latLon.lon, node.latLon.lat];
-               context.map().centerEase(loc);
-               that.selectImage(context, node.key, true);
-             }
+         behavior.restartIfNeeded = function (surface) {
+           if (_selected.empty()) {
+             surface.call(run, 'from');
 
-             dispatch$4.call('nodeChanged');
+             if (_timer) {
+               _timer.stop();
+             }
            }
+         };
 
-           function bearingChanged(e) {
-             dispatch$4.call('bearingChanged', undefined, e);
-           }
-         },
-         // Pass in the image key string as `imageKey`.
-         // This allows images to be selected from places that dont have access
-         // to the full image datum (like the street signs layer or the js viewer)
-         selectImage: function selectImage(context, imageKey, fromViewer) {
-           _mlySelectedImageKey = imageKey;
-           this.updateUrlImage(imageKey);
-           var d = _mlyCache.images.forImageKey[imageKey];
-           var viewer = context.container().select('.photoviewer');
-           if (!viewer.empty()) viewer.datum(d);
-           imageKey = d && d.key || imageKey;
+         behavior.off = function () {
+           _done = true;
 
-           if (!fromViewer && imageKey) {
-             _mlyClicks.push(imageKey);
+           if (_timer) {
+             _timer.stop();
            }
 
-           this.setStyles(context, null, true);
+           _selected.interrupt().call(reset);
+         };
 
-           if (_mlyShowFeatureDetections) {
-             this.updateDetections(imageKey, apibase + 'image_detections?layers=points&values=' + mapFeatureConfig.values + '&image_keys=' + imageKey);
-           }
+         return behavior;
+       }
 
-           if (_mlyShowSignDetections) {
-             this.updateDetections(imageKey, apibase + 'image_detections?layers=trafficsigns&image_keys=' + imageKey);
-           }
+       /* Creates a keybinding behavior for an operation */
+       function behaviorOperation(context) {
+         var _operation;
 
-           if (_mlyViewer && imageKey) {
-             _mlyViewer.moveToKey(imageKey)["catch"](function (e) {
-               console.error('mly3', e);
-             }); // eslint-disable-line no-console
+         function keypress(d3_event) {
+           // prevent operations during low zoom selection
+           if (!context.map().withinEditableZoom()) return;
+           if (_operation.availableForKeypress && !_operation.availableForKeypress()) return;
+           d3_event.preventDefault();
 
-           }
+           var disabled = _operation.disabled();
 
-           return this;
-         },
-         getActiveImage: function getActiveImage() {
-           return _mlyActiveImage;
-         },
-         getSelectedImageKey: function getSelectedImageKey() {
-           return _mlySelectedImageKey;
-         },
-         getSequenceKeyForImageKey: function getSequenceKeyForImageKey(imageKey) {
-           return _mlyCache.sequences.forImageKey[imageKey];
-         },
-         setActiveImage: function setActiveImage(node) {
-           if (node) {
-             _mlyActiveImage = {
-               ca: node.originalCA,
-               key: node.key,
-               loc: [node.originalLatLon.lon, node.originalLatLon.lat],
-               pano: node.pano
-             };
+           if (disabled) {
+             context.ui().flash.duration(4000).iconName('#iD-operation-' + _operation.id).iconClass('operation disabled').label(_operation.tooltip)();
            } else {
-             _mlyActiveImage = null;
+             context.ui().flash.duration(2000).iconName('#iD-operation-' + _operation.id).iconClass('operation').label(_operation.annotation() || _operation.title)();
+             if (_operation.point) _operation.point(null);
+
+             _operation();
            }
-         },
-         // Updates the currently highlighted sequence and selected bubble.
-         // Reset is only necessary when interacting with the viewport because
-         // this implicitly changes the currently selected bubble/sequence
-         setStyles: function setStyles(context, hovered, reset) {
-           if (reset) {
-             // reset all layers
-             context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false);
-             context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+         }
+
+         function behavior() {
+           if (_operation && _operation.available()) {
+             context.keybinding().on(_operation.keys, keypress);
            }
 
-           var hoveredImageKey = hovered && hovered.key;
-           var hoveredSequenceKey = hoveredImageKey && this.getSequenceKeyForImageKey(hoveredImageKey);
-           var hoveredLineString = hoveredSequenceKey && _mlyCache.sequences.lineString[hoveredSequenceKey];
-           var hoveredImageKeys = hoveredLineString && hoveredLineString.properties.coordinateProperties.image_keys || [];
-           var selectedImageKey = _mlySelectedImageKey;
-           var selectedSequenceKey = selectedImageKey && this.getSequenceKeyForImageKey(selectedImageKey);
-           var selectedLineString = selectedSequenceKey && _mlyCache.sequences.lineString[selectedSequenceKey];
-           var selectedImageKeys = selectedLineString && selectedLineString.properties.coordinateProperties.image_keys || []; // highlight sibling viewfields on either the selected or the hovered sequences
+           return behavior;
+         }
 
-           var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
-           context.container().selectAll('.layer-mapillary .viewfield-group').classed('highlighted', function (d) {
-             return highlightedImageKeys.indexOf(d.key) !== -1;
-           }).classed('hovered', function (d) {
-             return d.key === hoveredImageKey;
-           });
-           context.container().selectAll('.layer-mapillary .sequence').classed('highlighted', function (d) {
-             return d.properties.key === hoveredSequenceKey;
-           }).classed('currentView', function (d) {
-             return d.properties.key === selectedSequenceKey;
-           }); // update viewfields if needed
+         behavior.off = function () {
+           context.keybinding().off(_operation.keys);
+         };
+
+         behavior.which = function (_) {
+           if (!arguments.length) return _operation;
+           _operation = _;
+           return behavior;
+         };
 
-           context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+         return behavior;
+       }
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+       function operationCircularize(context, selectedIDs) {
+         var _extent;
 
-             if (d.pano && d.key !== selectedImageKey) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-             } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-             }
-           }
+         var _actions = selectedIDs.map(getAction).filter(Boolean);
 
-           return this;
-         },
-         updateDetections: function updateDetections(imageKey, url) {
-           if (!_mlyViewer || _mlyFallback) return;
-           if (!imageKey) return;
+         var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-           if (!_mlyCache.image_detections.forImageKey[imageKey]) {
-             loadData('image_detections', url).then(function () {
-               showDetections(_mlyCache.image_detections.forImageKey[imageKey] || []);
-             });
+         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+           return n.loc;
+         });
+
+         function getAction(entityID) {
+           var entity = context.entity(entityID);
+           if (entity.type !== 'way' || new Set(entity.nodes).size <= 1) return null;
+
+           if (!_extent) {
+             _extent = entity.extent(context.graph());
            } else {
-             showDetections(_mlyCache.image_detections.forImageKey[imageKey]);
+             _extent = _extent.extend(entity.extent(context.graph()));
            }
 
-           function showDetections(detections) {
-             detections.forEach(function (data) {
-               var tag = makeTag(data);
+           return actionCircularize(entityID, context.projection);
+         }
 
-               if (tag) {
-                 var tagComponent = _mlyViewer.getComponent('tag');
+         var operation = function operation() {
+           if (!_actions.length) return;
 
-                 tagComponent.add([tag]);
+           var combinedAction = function combinedAction(graph, t) {
+             _actions.forEach(function (action) {
+               if (!action.disabled(graph)) {
+                 graph = action(graph, t);
                }
              });
-           }
 
-           function makeTag(data) {
-             var valueParts = data.value.split('--');
-             if (!valueParts.length) return;
-             var tag;
-             var text;
-             var color = 0xffffff;
+             return graph;
+           };
 
-             if (_mlyHighlightedDetection === data.key) {
-               color = 0xffff00;
-               text = valueParts[1];
+           combinedAction.transitionable = true;
+           context.perform(combinedAction, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         };
 
-               if (text === 'flat' || text === 'discrete' || text === 'sign') {
-                 text = valueParts[2];
-               }
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         }; // don't cache this because the visible extent could change
 
-               text = text.replace(/-/g, ' ');
-               text = text.charAt(0).toUpperCase() + text.slice(1);
-               _mlyHighlightedDetection = null;
+
+         operation.disabled = function () {
+           if (!_actions.length) return '';
+
+           var actionDisableds = _actions.map(function (action) {
+             return action.disabled(context.graph());
+           }).filter(Boolean);
+
+           if (actionDisableds.length === _actions.length) {
+             // none of the features can be circularized
+             if (new Set(actionDisableds).size > 1) {
+               return 'multiple_blockers';
              }
 
-             if (data.shape.type === 'Polygon') {
-               var polygonGeometry = new Mapillary.TagComponent.PolygonGeometry(data.shape.coordinates[0]);
-               tag = new Mapillary.TagComponent.OutlineTag(data.key, polygonGeometry, {
-                 text: text,
-                 textColor: color,
-                 lineColor: color,
-                 lineWidth: 2,
-                 fillColor: color,
-                 fillOpacity: 0.3
-               });
-             } else if (data.shape.type === 'Point') {
-               var pointGeometry = new Mapillary.TagComponent.PointGeometry(data.shape.coordinates[0]);
-               tag = new Mapillary.TagComponent.SpotTag(data.key, pointGeometry, {
-                 text: text,
-                 color: color,
-                 textColor: color
+             return actionDisableds[0];
+           } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           }
+
+           return false;
+
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
+
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
                });
+
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
              }
 
-             return tag;
+             return false;
            }
-         },
-         cache: function cache() {
-           return _mlyCache;
-         }
-       };
+         };
 
-       function validationIssue(attrs) {
-         this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.circularize.' + disable + '.' + _amount) : _t('operations.circularize.description.' + _amount);
+         };
 
-         this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
+         operation.annotation = function () {
+           return _t('operations.circularize.annotation.feature', {
+             n: _actions.length
+           });
+         };
 
-         this.severity = attrs.severity; // required - 'warning' or 'error'
+         operation.id = 'circularize';
+         operation.keys = [_t('operations.circularize.key')];
+         operation.title = _t('operations.circularize.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         this.message = attrs.message; // required - function returning localized string
+       // For example, ⌘Z -> Ctrl+Z
 
-         this.reference = attrs.reference; // optional - function(selection) to render reference information
+       var uiCmd = function uiCmd(code) {
+         var detected = utilDetect();
 
-         this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
+         if (detected.os === 'mac') {
+           return code;
+         }
 
-         this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
+         if (detected.os === 'win') {
+           if (code === '⌘⇧Z') return 'Ctrl+Y';
+         }
 
-         this.data = attrs.data; // optional - object containing extra data for the fixes
+         var result = '',
+             replacements = {
+           '⌘': 'Ctrl',
+           '⇧': 'Shift',
+           '⌥': 'Alt',
+           '⌫': 'Backspace',
+           '⌦': 'Delete'
+         };
+
+         for (var i = 0; i < code.length; i++) {
+           if (code[i] in replacements) {
+             result += replacements[code[i]] + (i < code.length - 1 ? '+' : '');
+           } else {
+             result += code[i];
+           }
+         }
+
+         return result;
+       }; // return a display-focused string for a given keyboard code
+
+       uiCmd.display = function (code) {
+         if (code.length !== 1) return code;
+         var detected = utilDetect();
+         var mac = detected.os === 'mac';
+         var replacements = {
+           '⌘': mac ? '⌘ ' + _t('shortcuts.key.cmd') : _t('shortcuts.key.ctrl'),
+           '⇧': mac ? '⇧ ' + _t('shortcuts.key.shift') : _t('shortcuts.key.shift'),
+           '⌥': mac ? '⌥ ' + _t('shortcuts.key.option') : _t('shortcuts.key.alt'),
+           '⌃': mac ? '⌃ ' + _t('shortcuts.key.ctrl') : _t('shortcuts.key.ctrl'),
+           '⌫': mac ? '⌫ ' + _t('shortcuts.key.delete') : _t('shortcuts.key.backspace'),
+           '⌦': mac ? '⌦ ' + _t('shortcuts.key.del') : _t('shortcuts.key.del'),
+           '↖': mac ? '↖ ' + _t('shortcuts.key.pgup') : _t('shortcuts.key.pgup'),
+           '↘': mac ? '↘ ' + _t('shortcuts.key.pgdn') : _t('shortcuts.key.pgdn'),
+           '⇞': mac ? '⇞ ' + _t('shortcuts.key.home') : _t('shortcuts.key.home'),
+           '⇟': mac ? '⇟ ' + _t('shortcuts.key.end') : _t('shortcuts.key.end'),
+           '↵': mac ? '⏎ ' + _t('shortcuts.key.return') : _t('shortcuts.key.enter'),
+           '⎋': mac ? '⎋ ' + _t('shortcuts.key.esc') : _t('shortcuts.key.esc'),
+           '☰': mac ? '☰ ' + _t('shortcuts.key.menu') : _t('shortcuts.key.menu')
+         };
+         return replacements[code] || code;
+       };
 
-         this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
+       function operationDelete(context, selectedIDs) {
+         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+         var action = actionDeleteMultiple(selectedIDs);
+         var nodes = utilGetAllNodes(selectedIDs, context.graph());
+         var coords = nodes.map(function (n) {
+           return n.loc;
+         });
+         var extent = utilTotalExtent(selectedIDs, context.graph());
 
-         this.hash = attrs.hash; // optional - string to further differentiate the issue
+         var operation = function operation() {
+           var nextSelectedID;
+           var nextSelectedLoc;
 
-         this.id = generateID.apply(this); // generated - see below
+           if (selectedIDs.length === 1) {
+             var id = selectedIDs[0];
+             var entity = context.entity(id);
+             var geometry = entity.geometry(context.graph());
+             var parents = context.graph().parentWays(entity);
+             var parent = parents[0]; // Select the next closest node in the way.
 
-         this.autoFix = null; // generated - if autofix exists, will be set below
-         // A unique, deterministic string hash.
-         // Issues with identical id values are considered identical.
+             if (geometry === 'vertex') {
+               var nodes = parent.nodes;
+               var i = nodes.indexOf(id);
 
-         function generateID() {
-           var parts = [this.type];
+               if (i === 0) {
+                 i++;
+               } else if (i === nodes.length - 1) {
+                 i--;
+               } else {
+                 var a = geoSphericalDistance(entity.loc, context.entity(nodes[i - 1]).loc);
+                 var b = geoSphericalDistance(entity.loc, context.entity(nodes[i + 1]).loc);
+                 i = a < b ? i - 1 : i + 1;
+               }
 
-           if (this.hash) {
-             // subclasses can pass in their own differentiator
-             parts.push(this.hash);
+               nextSelectedID = nodes[i];
+               nextSelectedLoc = context.entity(nextSelectedID).loc;
+             }
            }
 
-           if (this.subtype) {
-             parts.push(this.subtype);
-           } // include the entities this issue is for
-           // (sort them so the id is deterministic)
-
+           context.perform(action, operation.annotation());
+           context.validator().validate();
 
-           if (this.entityIds) {
-             var entityKeys = this.entityIds.slice().sort();
-             parts.push.apply(parts, entityKeys);
+           if (nextSelectedID && nextSelectedLoc) {
+             if (context.hasEntity(nextSelectedID)) {
+               context.enter(modeSelect(context, [nextSelectedID]).follow(true));
+             } else {
+               context.map().centerEase(nextSelectedLoc);
+               context.enter(modeBrowse(context));
+             }
+           } else {
+             context.enter(modeBrowse(context));
            }
+         };
 
-           return parts.join(':');
-         }
+         operation.available = function () {
+           return true;
+         };
 
-         this.extent = function (resolver) {
-           if (this.loc) {
-             return geoExtent(this.loc);
+         operation.disabled = function () {
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           } else if (selectedIDs.some(protectedMember)) {
+             return 'part_of_relation';
+           } else if (selectedIDs.some(incompleteRelation)) {
+             return 'incomplete_relation';
+           } else if (selectedIDs.some(hasWikidataTag)) {
+             return 'has_wikidata_tag';
            }
 
-           if (this.entityIds && this.entityIds.length) {
-             return this.entityIds.reduce(function (extent, entityId) {
-               return extent.extend(resolver.entity(entityId).extent(resolver));
-             }, geoExtent());
-           }
+           return false;
 
-           return null;
-         };
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-         this.fixes = function (context) {
-           var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
-           var issue = this;
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-           if (issue.severity === 'warning') {
-             // allow ignoring any issue that's not an error
-             fixes.push(new validationIssueFix({
-               title: _t.html('issues.fix.ignore_issue.title'),
-               icon: 'iD-icon-close',
-               onClick: function onClick() {
-                 context.validator().ignoreIssue(this.issue.id);
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
                }
-             }));
-           }
-
-           fixes.forEach(function (fix) {
-             // the id doesn't matter as long as it's unique to this issue/fix
-             fix.id = fix.title; // add a reference to the issue for use in actions
-
-             fix.issue = issue;
-
-             if (fix.autoArgs) {
-               issue.autoFix = fix;
              }
-           });
-           return fixes;
-         };
-       }
-       function validationIssueFix(attrs) {
-         this.title = attrs.title; // Required
-
-         this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
 
-         this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
-
-         this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
-
-         this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
-
-         this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
+             return false;
+           }
 
-         this.issue = null; // Generated link - added by validationIssue
-       }
+           function hasWikidataTag(id) {
+             var entity = context.entity(id);
+             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+           }
 
-       var buildRuleChecks = function buildRuleChecks() {
-         return {
-           equals: function equals(_equals) {
-             return function (tags) {
-               return Object.keys(_equals).every(function (k) {
-                 return _equals[k] === tags[k];
-               });
-             };
-           },
-           notEquals: function notEquals(_notEquals) {
-             return function (tags) {
-               return Object.keys(_notEquals).some(function (k) {
-                 return _notEquals[k] !== tags[k];
-               });
-             };
-           },
-           absence: function absence(_absence) {
-             return function (tags) {
-               return Object.keys(tags).indexOf(_absence) === -1;
-             };
-           },
-           presence: function presence(_presence) {
-             return function (tags) {
-               return Object.keys(tags).indexOf(_presence) > -1;
-             };
-           },
-           greaterThan: function greaterThan(_greaterThan) {
-             var key = Object.keys(_greaterThan)[0];
-             var value = _greaterThan[key];
-             return function (tags) {
-               return tags[key] > value;
-             };
-           },
-           greaterThanEqual: function greaterThanEqual(_greaterThanEqual) {
-             var key = Object.keys(_greaterThanEqual)[0];
-             var value = _greaterThanEqual[key];
-             return function (tags) {
-               return tags[key] >= value;
-             };
-           },
-           lessThan: function lessThan(_lessThan) {
-             var key = Object.keys(_lessThan)[0];
-             var value = _lessThan[key];
-             return function (tags) {
-               return tags[key] < value;
-             };
-           },
-           lessThanEqual: function lessThanEqual(_lessThanEqual) {
-             var key = Object.keys(_lessThanEqual)[0];
-             var value = _lessThanEqual[key];
-             return function (tags) {
-               return tags[key] <= value;
-             };
-           },
-           positiveRegex: function positiveRegex(_positiveRegex) {
-             var tagKey = Object.keys(_positiveRegex)[0];
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }
 
-             var expression = _positiveRegex[tagKey].join('|');
+           function protectedMember(id) {
+             var entity = context.entity(id);
+             if (entity.type !== 'way') return false;
+             var parents = context.graph().parentRelations(entity);
 
-             var regex = new RegExp(expression);
-             return function (tags) {
-               return regex.test(tags[tagKey]);
-             };
-           },
-           negativeRegex: function negativeRegex(_negativeRegex) {
-             var tagKey = Object.keys(_negativeRegex)[0];
+             for (var i = 0; i < parents.length; i++) {
+               var parent = parents[i];
+               var type = parent.tags.type;
+               var role = parent.memberById(id).role || 'outer';
 
-             var expression = _negativeRegex[tagKey].join('|');
+               if (type === 'route' || type === 'boundary' || type === 'multipolygon' && role === 'outer') {
+                 return true;
+               }
+             }
 
-             var regex = new RegExp(expression);
-             return function (tags) {
-               return !regex.test(tags[tagKey]);
-             };
+             return false;
            }
          };
-       };
 
-       var buildLineKeys = function buildLineKeys() {
-         return {
-           highway: {
-             rest_area: true,
-             services: true
-           },
-           railway: {
-             roundhouse: true,
-             station: true,
-             traverser: true,
-             turntable: true,
-             wash: true
-           }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.delete.' + disable + '.' + multi) : _t('operations.delete.description.' + multi);
          };
-       };
-
-       var serviceMapRules = {
-         init: function init() {
-           this._ruleChecks = buildRuleChecks();
-           this._validationRules = [];
-           this._areaKeys = osmAreaKeys;
-           this._lineKeys = buildLineKeys();
-         },
-         // list of rules only relevant to tag checks...
-         filterRuleChecks: function filterRuleChecks(selector) {
-           var _ruleChecks = this._ruleChecks;
-           return Object.keys(selector).reduce(function (rules, key) {
-             if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
-               rules.push(_ruleChecks[key](selector[key]));
-             }
-
-             return rules;
-           }, []);
-         },
-         // builds tagMap from mapcss-parse selector object...
-         buildTagMap: function buildTagMap(selector) {
-           var getRegexValues = function getRegexValues(regexes) {
-             return regexes.map(function (regex) {
-               return regex.replace(/\$|\^/g, '');
-             });
-           };
-
-           var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
-             var values;
-             var isRegex = /regex/gi.test(key);
-             var isEqual = /equals/gi.test(key);
 
-             if (isRegex || isEqual) {
-               Object.keys(selector[key]).forEach(function (selectorKey) {
-                 values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.delete.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.delete.annotation.feature', {
+             n: selectedIDs.length
+           });
+         };
 
-                 if (expectedTags.hasOwnProperty(selectorKey)) {
-                   values = values.concat(expectedTags[selectorKey]);
-                 }
+         operation.id = 'delete';
+         operation.keys = [uiCmd('⌘⌫'), uiCmd('⌘⌦'), uiCmd('⌦')];
+         operation.title = _t('operations.delete.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-                 expectedTags[selectorKey] = values;
-               });
-             } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
-               var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
-               values = [selector[key][tagKey]];
+       function operationOrthogonalize(context, selectedIDs) {
+         var _extent;
 
-               if (expectedTags.hasOwnProperty(tagKey)) {
-                 values = values.concat(expectedTags[tagKey]);
-               }
+         var _type;
 
-               expectedTags[tagKey] = values;
-             }
+         var _actions = selectedIDs.map(chooseAction).filter(Boolean);
 
-             return expectedTags;
-           }, {});
-           return tagMap;
-         },
-         // inspired by osmWay#isArea()
-         inferGeometry: function inferGeometry(tagMap) {
-           var _lineKeys = this._lineKeys;
-           var _areaKeys = this._areaKeys;
+         var _amount = _actions.length === 1 ? 'single' : 'multiple';
 
-           var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
-             return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
-           };
+         var _coords = utilGetAllNodes(selectedIDs, context.graph()).map(function (n) {
+           return n.loc;
+         });
 
-           var keyValueImpliesLine = function keyValueImpliesLine(key) {
-             return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
-           };
+         function chooseAction(entityID) {
+           var entity = context.entity(entityID);
+           var geometry = entity.geometry(context.graph());
 
-           if (tagMap.hasOwnProperty('area')) {
-             if (tagMap.area.indexOf('yes') > -1) {
-               return 'area';
-             }
+           if (!_extent) {
+             _extent = entity.extent(context.graph());
+           } else {
+             _extent = _extent.extend(entity.extent(context.graph()));
+           } // square a line/area
 
-             if (tagMap.area.indexOf('no') > -1) {
-               return 'line';
-             }
-           }
 
-           for (var key in tagMap) {
-             if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
-               return 'area';
-             }
+           if (entity.type === 'way' && new Set(entity.nodes).size > 2) {
+             if (_type && _type !== 'feature') return null;
+             _type = 'feature';
+             return actionOrthogonalize(entityID, context.projection); // square a single vertex
+           } else if (geometry === 'vertex') {
+             if (_type && _type !== 'corner') return null;
+             _type = 'corner';
+             var graph = context.graph();
+             var parents = graph.parentWays(entity);
 
-             if (key in _lineKeys && keyValueImpliesLine(key)) {
-               return 'area';
-             }
-           }
+             if (parents.length === 1) {
+               var way = parents[0];
 
-           return 'line';
-         },
-         // adds from mapcss-parse selector check...
-         addRule: function addRule(selector) {
-           var rule = {
-             // checks relevant to mapcss-selector
-             checks: this.filterRuleChecks(selector),
-             // true if all conditions for a tag error are true..
-             matches: function matches(entity) {
-               return this.checks.every(function (check) {
-                 return check(entity.tags);
-               });
-             },
-             // borrowed from Way#isArea()
-             inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
-             geometryMatches: function geometryMatches(entity, graph) {
-               if (entity.type === 'node' || entity.type === 'relation') {
-                 return selector.geometry === entity.type;
-               } else if (entity.type === 'way') {
-                 return this.inferredGeometry === entity.geometry(graph);
-               }
-             },
-             // when geometries match and tag matches are present, return a warning...
-             findIssues: function findIssues(entity, graph, issues) {
-               if (this.geometryMatches(entity, graph) && this.matches(entity)) {
-                 var severity = Object.keys(selector).indexOf('error') > -1 ? 'error' : 'warning';
-                 var _message = selector[severity];
-                 issues.push(new validationIssue({
-                   type: 'maprules',
-                   severity: severity,
-                   message: function message() {
-                     return _message;
-                   },
-                   entityIds: [entity.id]
-                 }));
+               if (way.nodes.indexOf(entityID) !== -1) {
+                 return actionOrthogonalize(way.id, context.projection, entityID);
                }
              }
-           };
+           }
 
-           this._validationRules.push(rule);
-         },
-         clearRules: function clearRules() {
-           this._validationRules = [];
-         },
-         // returns validationRules...
-         validationRules: function validationRules() {
-           return this._validationRules;
-         },
-         // returns ruleChecks
-         ruleChecks: function ruleChecks() {
-           return this._ruleChecks;
+           return null;
          }
-       };
-
-       var apibase$1 = 'https://nominatim.openstreetmap.org/';
-       var _inflight = {};
-
-       var _nominatimCache;
 
-       var serviceNominatim = {
-         init: function init() {
-           _inflight = {};
-           _nominatimCache = new RBush();
-         },
-         reset: function reset() {
-           Object.values(_inflight).forEach(function (controller) {
-             controller.abort();
-           });
-           _inflight = {};
-           _nominatimCache = new RBush();
-         },
-         countryCode: function countryCode(location, callback) {
-           this.reverse(location, function (err, result) {
-             if (err) {
-               return callback(err);
-             } else if (result.address) {
-               return callback(null, result.address.country_code);
-             } else {
-               return callback('Unable to geocode', null);
-             }
-           });
-         },
-         reverse: function reverse(loc, callback) {
-           var cached = _nominatimCache.search({
-             minX: loc[0],
-             minY: loc[1],
-             maxX: loc[0],
-             maxY: loc[1]
-           });
+         var operation = function operation() {
+           if (!_actions.length) return;
 
-           if (cached.length > 0) {
-             if (callback) callback(null, cached[0].data);
-             return;
-           }
+           var combinedAction = function combinedAction(graph, t) {
+             _actions.forEach(function (action) {
+               if (!action.disabled(graph)) {
+                 graph = action(graph, t);
+               }
+             });
 
-           var params = {
-             zoom: 13,
-             format: 'json',
-             addressdetails: 1,
-             lat: loc[1],
-             lon: loc[0]
+             return graph;
            };
-           var url = apibase$1 + 'reverse?' + utilQsString(params);
-           if (_inflight[url]) return;
-           var controller = new AbortController();
-           _inflight[url] = controller;
-           d3_json(url, {
-             signal: controller.signal
-           }).then(function (result) {
-             delete _inflight[url];
 
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+           combinedAction.transitionable = true;
+           context.perform(combinedAction, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         };
 
-             var extent = geoExtent(loc).padByMeters(200);
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         }; // don't cache this because the visible extent could change
 
-             _nominatimCache.insert(Object.assign(extent.bbox(), {
-               data: result
-             }));
 
-             if (callback) callback(null, result);
-           })["catch"](function (err) {
-             delete _inflight[url];
-             if (err.name === 'AbortError') return;
-             if (callback) callback(err.message);
-           });
-         },
-         search: function search(val, callback) {
-           var searchVal = encodeURIComponent(val);
-           var url = apibase$1 + 'search/' + searchVal + '?limit=10&format=json';
-           if (_inflight[url]) return;
-           var controller = new AbortController();
-           _inflight[url] = controller;
-           d3_json(url, {
-             signal: controller.signal
-           }).then(function (result) {
-             delete _inflight[url];
+         operation.disabled = function () {
+           if (!_actions.length) return '';
+
+           var actionDisableds = _actions.map(function (action) {
+             return action.disabled(context.graph());
+           }).filter(Boolean);
 
-             if (result && result.error) {
-               throw new Error(result.error);
+           if (actionDisableds.length === _actions.length) {
+             // none of the features can be squared
+             if (new Set(actionDisableds).size > 1) {
+               return 'multiple_blockers';
              }
 
-             if (callback) callback(null, result);
-           })["catch"](function (err) {
-             delete _inflight[url];
-             if (err.name === 'AbortError') return;
-             if (callback) callback(err.message);
-           });
-         }
-       };
-
-       var apibase$2 = 'https://openstreetcam.org';
-       var maxResults$1 = 1000;
-       var tileZoom$1 = 14;
-       var tiler$4 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
-       var dispatch$5 = dispatch('loadedImages');
-       var imgZoom = d3_zoom().extent([[0, 0], [320, 240]]).translateExtent([[0, 0], [320, 240]]).scaleExtent([1, 15]);
+             return actionDisableds[0];
+           } else if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           }
 
-       var _oscCache;
+           return false;
 
-       var _oscSelectedImage;
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-       var _loadViewerPromise$1;
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-       function abortRequest$4(controller) {
-         controller.abort();
-       }
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-       function maxPageAtZoom$1(z) {
-         if (z < 15) return 2;
-         if (z === 15) return 5;
-         if (z === 16) return 10;
-         if (z === 17) return 20;
-         if (z === 18) return 40;
-         if (z > 18) return 80;
-       }
+             return false;
+           }
+         };
 
-       function loadTiles$1(which, url, projection) {
-         var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
-         var tiles = tiler$4.getTiles(projection); // abort inflight requests that are no longer needed
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.orthogonalize.' + disable + '.' + _amount) : _t('operations.orthogonalize.description.' + _type + '.' + _amount);
+         };
 
-         var cache = _oscCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k.indexOf(tile.id + ',') === 0;
+         operation.annotation = function () {
+           return _t('operations.orthogonalize.annotation.' + _type, {
+             n: _actions.length
            });
+         };
 
-           if (!wanted) {
-             abortRequest$4(cache.inflight[k]);
-             delete cache.inflight[k];
-           }
-         });
-         tiles.forEach(function (tile) {
-           loadNextTilePage$1(which, currZoom, url, tile);
-         });
+         operation.id = 'orthogonalize';
+         operation.keys = [_t('operations.orthogonalize.key')];
+         operation.title = _t('operations.orthogonalize.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
        }
 
-       function loadNextTilePage$1(which, currZoom, url, tile) {
-         var cache = _oscCache[which];
-         var bbox = tile.extent.bbox();
-         var maxPages = maxPageAtZoom$1(currZoom);
-         var nextPage = cache.nextPage[tile.id] || 1;
-         var params = utilQsString({
-           ipp: maxResults$1,
-           page: nextPage,
-           // client_id: clientId,
-           bbTopLeft: [bbox.maxY, bbox.minX].join(','),
-           bbBottomRight: [bbox.minY, bbox.maxX].join(',')
-         }, true);
-         if (nextPage > maxPages) return;
-         var id = tile.id + ',' + String(nextPage);
-         if (cache.loaded[id] || cache.inflight[id]) return;
-         var controller = new AbortController();
-         cache.inflight[id] = controller;
-         var options = {
-           method: 'POST',
-           signal: controller.signal,
-           body: params,
-           headers: {
-             'Content-Type': 'application/x-www-form-urlencoded'
-           }
+       function operationReflectShort(context, selectedIDs) {
+         return operationReflect(context, selectedIDs, 'short');
+       }
+       function operationReflectLong(context, selectedIDs) {
+         return operationReflect(context, selectedIDs, 'long');
+       }
+       function operationReflect(context, selectedIDs, axis) {
+         axis = axis || 'long';
+         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+         var nodes = utilGetAllNodes(selectedIDs, context.graph());
+         var coords = nodes.map(function (n) {
+           return n.loc;
+         });
+         var extent = utilTotalExtent(selectedIDs, context.graph());
+
+         var operation = function operation() {
+           var action = actionReflect(selectedIDs, context.projection).useLongAxis(Boolean(axis === 'long'));
+           context.perform(action, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
          };
-         d3_json(url, options).then(function (data) {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
 
-           if (!data || !data.currentPageItems || !data.currentPageItems.length) {
-             throw new Error('No Data');
+         operation.available = function () {
+           return nodes.length >= 3;
+         }; // don't cache this because the visible extent could change
+
+
+         operation.disabled = function () {
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           } else if (selectedIDs.some(incompleteRelation)) {
+             return 'incomplete_relation';
            }
 
-           var features = data.currentPageItems.map(function (item) {
-             var loc = [+item.lng, +item.lat];
-             var d;
+           return false;
 
-             if (which === 'images') {
-               d = {
-                 loc: loc,
-                 key: item.id,
-                 ca: +item.heading,
-                 captured_at: item.shot_date || item.date_added,
-                 captured_by: item.username,
-                 imagePath: item.lth_name,
-                 sequence_id: item.sequence_id,
-                 sequence_index: +item.sequence_index
-               }; // cache sequence info
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-               var seq = _oscCache.sequences[d.sequence_id];
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-               if (!seq) {
-                 seq = {
-                   rotation: 0,
-                   images: []
-                 };
-                 _oscCache.sequences[d.sequence_id] = seq;
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
                }
-
-               seq.images[d.sequence_index] = d;
-               _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
              }
 
-             return {
-               minX: loc[0],
-               minY: loc[1],
-               maxX: loc[0],
-               maxY: loc[1],
-               data: d
-             };
-           });
-           cache.rtree.load(features);
-
-           if (data.currentPageItems.length === maxResults$1) {
-             // more pages to load
-             cache.nextPage[tile.id] = nextPage + 1;
-             loadNextTilePage$1(which, currZoom, url, tile);
-           } else {
-             cache.nextPage[tile.id] = Infinity; // no more pages to load
+             return false;
            }
 
-           if (which === 'images') {
-             dispatch$5.call('loadedImages');
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
            }
-         })["catch"](function () {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
-         });
-       } // partition viewport into higher zoom tiles
+         };
 
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.reflect.' + disable + '.' + multi) : _t('operations.reflect.description.' + axis + '.' + multi);
+         };
 
-       function partitionViewport$1(projection) {
-         var z = geoScaleToZoom(projection.scale());
-         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
+         operation.annotation = function () {
+           return _t('operations.reflect.annotation.' + axis + '.feature', {
+             n: selectedIDs.length
+           });
+         };
 
-         var tiler = utilTiler().zoomExtent([z2, z2]);
-         return tiler.getTiles(projection).map(function (tile) {
-           return tile.extent;
+         operation.id = 'reflect-' + axis;
+         operation.keys = [_t('operations.reflect.key.' + axis)];
+         operation.title = _t('operations.reflect.title.' + axis);
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
+
+       function operationMove(context, selectedIDs) {
+         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+         var nodes = utilGetAllNodes(selectedIDs, context.graph());
+         var coords = nodes.map(function (n) {
+           return n.loc;
          });
-       } // no more than `limit` results per partition.
+         var extent = utilTotalExtent(selectedIDs, context.graph());
 
+         var operation = function operation() {
+           context.enter(modeMove(context, selectedIDs));
+         };
 
-       function searchLimited$1(limit, projection, rtree) {
-         limit = limit || 5;
-         return partitionViewport$1(projection).reduce(function (result, extent) {
-           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
-             return d.data;
-           });
-           return found.length ? result.concat(found) : result;
-         }, []);
-       }
+         operation.available = function () {
+           return selectedIDs.length > 0;
+         };
 
-       var serviceOpenstreetcam = {
-         init: function init() {
-           if (!_oscCache) {
-             this.reset();
+         operation.disabled = function () {
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           } else if (selectedIDs.some(incompleteRelation)) {
+             return 'incomplete_relation';
            }
 
-           this.event = utilRebind(this, dispatch$5, 'on');
-         },
-         reset: function reset() {
-           if (_oscCache) {
-             Object.values(_oscCache.images.inflight).forEach(abortRequest$4);
-           }
+           return false;
 
-           _oscCache = {
-             images: {
-               inflight: {},
-               loaded: {},
-               nextPage: {},
-               rtree: new RBush(),
-               forImageKey: {}
-             },
-             sequences: {}
-           };
-           _oscSelectedImage = null;
-         },
-         images: function images(projection) {
-           var limit = 5;
-           return searchLimited$1(limit, projection, _oscCache.images.rtree);
-         },
-         sequences: function sequences(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-           var sequenceKeys = {}; // all sequences for images in viewport
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-           _oscCache.images.rtree.search(bbox).forEach(function (d) {
-             sequenceKeys[d.data.sequence_id] = true;
-           }); // make linestrings from those sequences
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-           var lineStrings = [];
-           Object.keys(sequenceKeys).forEach(function (sequenceKey) {
-             var seq = _oscCache.sequences[sequenceKey];
-             var images = seq && seq.images;
+             return false;
+           }
 
-             if (images) {
-               lineStrings.push({
-                 type: 'LineString',
-                 coordinates: images.map(function (d) {
-                   return d.loc;
-                 }).filter(Boolean),
-                 properties: {
-                   captured_at: images[0] ? images[0].captured_at : null,
-                   captured_by: images[0] ? images[0].captured_by : null,
-                   key: sequenceKey
-                 }
-               });
-             }
-           });
-           return lineStrings;
-         },
-         cachedImage: function cachedImage(imageKey) {
-           return _oscCache.images.forImageKey[imageKey];
-         },
-         loadImages: function loadImages(projection) {
-           var url = apibase$2 + '/1.0/list/nearby-photos/';
-           loadTiles$1('images', url, projection);
-         },
-         ensureViewerLoaded: function ensureViewerLoaded(context) {
-           if (_loadViewerPromise$1) return _loadViewerPromise$1; // add osc-wrapper
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }
+         };
 
-           var wrap = context.container().select('.photoviewer').selectAll('.osc-wrapper').data([0]);
-           var that = this;
-           var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper osc-wrapper').classed('hide', true).call(imgZoom.on('zoom', zoomPan)).on('dblclick.zoom', null);
-           wrapEnter.append('div').attr('class', 'photo-attribution fillD');
-           var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
-           controlsEnter.append('button').on('click.back', step(-1)).html('◄');
-           controlsEnter.append('button').on('click.rotate-ccw', rotate(-90)).html('⤿');
-           controlsEnter.append('button').on('click.rotate-cw', rotate(90)).html('⤾');
-           controlsEnter.append('button').on('click.forward', step(1)).html('►');
-           wrapEnter.append('div').attr('class', 'osc-image-wrap'); // Register viewer resize handler
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.move.' + disable + '.' + multi) : _t('operations.move.description.' + multi);
+         };
 
-           context.ui().photoviewer.on('resize.openstreetcam', function (dimensions) {
-             imgZoom = d3_zoom().extent([[0, 0], dimensions]).translateExtent([[0, 0], dimensions]).scaleExtent([1, 15]).on('zoom', zoomPan);
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.move.annotation.feature', {
+             n: selectedIDs.length
            });
+         };
 
-           function zoomPan(d3_event) {
-             var t = d3_event.transform;
-             context.container().select('.photoviewer .osc-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
-           }
-
-           function rotate(deg) {
-             return function () {
-               if (!_oscSelectedImage) return;
-               var sequenceKey = _oscSelectedImage.sequence_id;
-               var sequence = _oscCache.sequences[sequenceKey];
-               if (!sequence) return;
-               var r = sequence.rotation || 0;
-               r += deg;
-               if (r > 180) r -= 360;
-               if (r < -180) r += 360;
-               sequence.rotation = r;
-               var wrap = context.container().select('.photoviewer .osc-wrapper');
-               wrap.transition().duration(100).call(imgZoom.transform, identity$2);
-               wrap.selectAll('.osc-image').transition().duration(100).style('transform', 'rotate(' + r + 'deg)');
-             };
-           }
+         operation.id = 'move';
+         operation.keys = [_t('operations.move.key')];
+         operation.title = _t('operations.move.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         operation.mouseOnly = true;
+         return operation;
+       }
 
-           function step(stepBy) {
-             return function () {
-               if (!_oscSelectedImage) return;
-               var sequenceKey = _oscSelectedImage.sequence_id;
-               var sequence = _oscCache.sequences[sequenceKey];
-               if (!sequence) return;
-               var nextIndex = _oscSelectedImage.sequence_index + stepBy;
-               var nextImage = sequence.images[nextIndex];
-               if (!nextImage) return;
-               context.map().centerEase(nextImage.loc);
-               that.selectImage(context, nextImage.key);
-             };
-           } // don't need any async loading so resolve immediately
+       function modeRotate(context, entityIDs) {
+         var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeMove
 
+         var mode = {
+           id: 'rotate',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('rotate');
+         var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationMove(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior];
+         var annotation = entityIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.rotate.annotation.feature', {
+           n: entityIDs.length
+         });
 
-           _loadViewerPromise$1 = Promise.resolve();
-           return _loadViewerPromise$1;
-         },
-         showViewer: function showViewer(context) {
-           var viewer = context.container().select('.photoviewer').classed('hide', false);
-           var isHidden = viewer.selectAll('.photo-wrapper.osc-wrapper.hide').size();
+         var _prevGraph;
 
-           if (isHidden) {
-             viewer.selectAll('.photo-wrapper:not(.osc-wrapper)').classed('hide', true);
-             viewer.selectAll('.photo-wrapper.osc-wrapper').classed('hide', false);
-           }
+         var _prevAngle;
 
-           return this;
-         },
-         hideViewer: function hideViewer(context) {
-           _oscSelectedImage = null;
-           this.updateUrlImage(null);
-           var viewer = context.container().select('.photoviewer');
-           if (!viewer.empty()) viewer.datum(null);
-           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
-           context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
-           return this.setStyles(context, null, true);
-         },
-         selectImage: function selectImage(context, imageKey) {
-           var d = this.cachedImage(imageKey);
-           _oscSelectedImage = d;
-           this.updateUrlImage(imageKey);
-           var viewer = context.container().select('.photoviewer');
-           if (!viewer.empty()) viewer.datum(d);
-           this.setStyles(context, null, true);
-           context.container().selectAll('.icon-sign').classed('currentView', false);
-           if (!d) return this;
-           var wrap = context.container().select('.photoviewer .osc-wrapper');
-           var imageWrap = wrap.selectAll('.osc-image-wrap');
-           var attribution = wrap.selectAll('.photo-attribution').html('');
-           wrap.transition().duration(100).call(imgZoom.transform, identity$2);
-           imageWrap.selectAll('.osc-image').remove();
+         var _prevTransform;
 
-           if (d) {
-             var sequence = _oscCache.sequences[d.sequence_id];
-             var r = sequence && sequence.rotation || 0;
-             imageWrap.append('img').attr('class', 'osc-image').attr('src', apibase$2 + '/' + d.imagePath).style('transform', 'rotate(' + r + 'deg)');
+         var _pivot; // use pointer events on supported platforms; fallback to mouse events
 
-             if (d.captured_by) {
-               attribution.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://openstreetcam.org/user/' + encodeURIComponent(d.captured_by)).html('@' + d.captured_by);
-               attribution.append('span').html('|');
-             }
 
-             if (d.captured_at) {
-               attribution.append('span').attr('class', 'captured_at').html(localeDateString(d.captured_at));
-               attribution.append('span').html('|');
-             }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-             attribution.append('a').attr('class', 'image-link').attr('target', '_blank').attr('href', 'https://openstreetcam.org/details/' + d.sequence_id + '/' + d.sequence_index).html('openstreetcam.org');
-           }
+         function doRotate(d3_event) {
+           var fn;
 
-           return this;
+           if (context.graph() !== _prevGraph) {
+             fn = context.perform;
+           } else {
+             fn = context.replace;
+           } // projection changed, recalculate _pivot
 
-           function localeDateString(s) {
-             if (!s) return null;
-             var options = {
-               day: 'numeric',
-               month: 'short',
-               year: 'numeric'
-             };
-             var d = new Date(s);
-             if (isNaN(d.getTime())) return null;
-             return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-           }
-         },
-         getSelectedImage: function getSelectedImage() {
-           return _oscSelectedImage;
-         },
-         getSequenceKeyForImage: function getSequenceKeyForImage(d) {
-           return d && d.sequence_id;
-         },
-         // Updates the currently highlighted sequence and selected bubble.
-         // Reset is only necessary when interacting with the viewport because
-         // this implicitly changes the currently selected bubble/sequence
-         setStyles: function setStyles(context, hovered, reset) {
-           if (reset) {
-             // reset all layers
-             context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
-             context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
-           }
 
-           var hoveredImageKey = hovered && hovered.key;
-           var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
-           var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
-           var hoveredImageKeys = hoveredSequence && hoveredSequence.images.map(function (d) {
-             return d.key;
-           }) || [];
-           var viewer = context.container().select('.photoviewer');
-           var selected = viewer.empty() ? undefined : viewer.datum();
-           var selectedImageKey = selected && selected.key;
-           var selectedSequenceKey = this.getSequenceKeyForImage(selected);
-           var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
-           var selectedImageKeys = selectedSequence && selectedSequence.images.map(function (d) {
-             return d.key;
-           }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
+           var projection = context.projection;
+           var currTransform = projection.transform();
 
-           var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
-           context.container().selectAll('.layer-openstreetcam .viewfield-group').classed('highlighted', function (d) {
-             return highlightedImageKeys.indexOf(d.key) !== -1;
-           }).classed('hovered', function (d) {
-             return d.key === hoveredImageKey;
-           }).classed('currentView', function (d) {
-             return d.key === selectedImageKey;
-           });
-           context.container().selectAll('.layer-openstreetcam .sequence').classed('highlighted', function (d) {
-             return d.properties.key === hoveredSequenceKey;
-           }).classed('currentView', function (d) {
-             return d.properties.key === selectedSequenceKey;
-           }); // update viewfields if needed
+           if (!_prevTransform || currTransform.k !== _prevTransform.k || currTransform.x !== _prevTransform.x || currTransform.y !== _prevTransform.y) {
+             var nodes = utilGetAllNodes(entityIDs, context.graph());
+             var points = nodes.map(function (n) {
+               return projection(n.loc);
+             });
+             _pivot = getPivot(points);
+             _prevAngle = undefined;
+           }
 
-           context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+           var currMouse = context.map().mouse(d3_event);
+           var currAngle = Math.atan2(currMouse[1] - _pivot[1], currMouse[0] - _pivot[0]);
+           if (typeof _prevAngle === 'undefined') _prevAngle = currAngle;
+           var delta = currAngle - _prevAngle;
+           fn(actionRotate(entityIDs, _pivot, delta, projection));
+           _prevTransform = currTransform;
+           _prevAngle = currAngle;
+           _prevGraph = context.graph();
+         }
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+         function getPivot(points) {
+           var _pivot;
 
-             if (d.pano && d.key !== selectedImageKey) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+           if (points.length === 1) {
+             _pivot = points[0];
+           } else if (points.length === 2) {
+             _pivot = geoVecInterp(points[0], points[1], 0.5);
+           } else {
+             var polygonHull = d3_polygonHull(points);
+
+             if (polygonHull.length === 2) {
+               _pivot = geoVecInterp(points[0], points[1], 0.5);
              } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+               _pivot = d3_polygonCentroid(d3_polygonHull(points));
              }
            }
 
-           return this;
-         },
-         updateUrlImage: function updateUrlImage(imageKey) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
-
-             if (imageKey) {
-               hash.photo = 'openstreetcam/' + imageKey;
-             } else {
-               delete hash.photo;
-             }
+           return _pivot;
+         }
 
-             window.location.replace('#' + utilQsString(hash, true));
-           }
-         },
-         cache: function cache() {
-           return _oscCache;
+         function finish(d3_event) {
+           d3_event.stopPropagation();
+           context.replace(actionNoop(), annotation);
+           context.enter(modeSelect(context, entityIDs));
          }
-       };
 
-       var FORCED$f = fails(function () {
-         return new Date(NaN).toJSON() !== null
-           || Date.prototype.toJSON.call({ toISOString: function () { return 1; } }) !== 1;
-       });
+         function cancel() {
+           if (_prevGraph) context.pop(); // remove the rotate
 
-       // `Date.prototype.toJSON` method
-       // https://tc39.github.io/ecma262/#sec-date.prototype.tojson
-       _export({ target: 'Date', proto: true, forced: FORCED$f }, {
-         // eslint-disable-next-line no-unused-vars
-         toJSON: function toJSON(key) {
-           var O = toObject(this);
-           var pv = toPrimitive(O);
-           return typeof pv == 'number' && !isFinite(pv) ? null : O.toISOString();
+           context.enter(modeSelect(context, entityIDs));
          }
-       });
 
-       // `URL.prototype.toJSON` method
-       // https://url.spec.whatwg.org/#dom-url-tojson
-       _export({ target: 'URL', proto: true, enumerable: true }, {
-         toJSON: function toJSON() {
-           return URL.prototype.toString.call(this);
+         function undone() {
+           context.enter(modeBrowse(context));
          }
-       });
-
-       /**
-        * Checks if `value` is the
-        * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
-        * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
-        *
-        * @static
-        * @memberOf _
-        * @since 0.1.0
-        * @category Lang
-        * @param {*} value The value to check.
-        * @returns {boolean} Returns `true` if `value` is an object, else `false`.
-        * @example
-        *
-        * _.isObject({});
-        * // => true
-        *
-        * _.isObject([1, 2, 3]);
-        * // => true
-        *
-        * _.isObject(_.noop);
-        * // => true
-        *
-        * _.isObject(null);
-        * // => false
-        */
-       function isObject$1(value) {
-         var type = _typeof(value);
-
-         return value != null && (type == 'object' || type == 'function');
-       }
 
-       /** Detect free variable `global` from Node.js. */
-       var freeGlobal = (typeof global === "undefined" ? "undefined" : _typeof(global)) == 'object' && global && global.Object === Object && global;
+         mode.enter = function () {
+           _prevGraph = null;
+           context.features().forceVisible(entityIDs);
+           behaviors.forEach(context.install);
+           var downEvent;
+           context.surface().on(_pointerPrefix + 'down.modeRotate', function (d3_event) {
+             downEvent = d3_event;
+           });
+           select(window).on(_pointerPrefix + 'move.modeRotate', doRotate, true).on(_pointerPrefix + 'up.modeRotate', function (d3_event) {
+             if (!downEvent) return;
+             var mapNode = context.container().select('.main-map').node();
+             var pointGetter = utilFastMouse(mapNode);
+             var p1 = pointGetter(downEvent);
+             var p2 = pointGetter(d3_event);
+             var dist = geoVecLength(p1, p2);
+             if (dist <= _tolerancePx) finish(d3_event);
+             downEvent = null;
+           }, true);
+           context.history().on('undone.modeRotate', undone);
+           keybinding.on('⎋', cancel).on('↩', finish);
+           select(document).call(keybinding);
+         };
 
-       /** Detect free variable `self`. */
+         mode.exit = function () {
+           behaviors.forEach(context.uninstall);
+           context.surface().on(_pointerPrefix + 'down.modeRotate', null);
+           select(window).on(_pointerPrefix + 'move.modeRotate', null, true).on(_pointerPrefix + 'up.modeRotate', null, true);
+           context.history().on('undone.modeRotate', null);
+           select(document).call(keybinding.unbind);
+           context.features().forceVisible([]);
+         };
 
-       var freeSelf = (typeof self === "undefined" ? "undefined" : _typeof(self)) == 'object' && self && self.Object === Object && self;
-       /** Used as a reference to the global object. */
+         mode.selectedIDs = function () {
+           if (!arguments.length) return entityIDs; // no assign
 
-       var root$1 = freeGlobal || freeSelf || Function('return this')();
+           return mode;
+         };
 
-       /**
-        * Gets the timestamp of the number of milliseconds that have elapsed since
-        * the Unix epoch (1 January 1970 00:00:00 UTC).
-        *
-        * @static
-        * @memberOf _
-        * @since 2.4.0
-        * @category Date
-        * @returns {number} Returns the timestamp.
-        * @example
-        *
-        * _.defer(function(stamp) {
-        *   console.log(_.now() - stamp);
-        * }, _.now());
-        * // => Logs the number of milliseconds it took for the deferred invocation.
-        */
+         return mode;
+       }
 
-       var now$1 = function now() {
-         return root$1.Date.now();
-       };
+       function operationRotate(context, selectedIDs) {
+         var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+         var nodes = utilGetAllNodes(selectedIDs, context.graph());
+         var coords = nodes.map(function (n) {
+           return n.loc;
+         });
+         var extent = utilTotalExtent(selectedIDs, context.graph());
 
-       /** Built-in value references. */
+         var operation = function operation() {
+           context.enter(modeRotate(context, selectedIDs));
+         };
 
-       var _Symbol = root$1.Symbol;
+         operation.available = function () {
+           return nodes.length >= 2;
+         };
 
-       /** Used for built-in method references. */
+         operation.disabled = function () {
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
+           } else if (selectedIDs.some(incompleteRelation)) {
+             return 'incomplete_relation';
+           }
 
-       var objectProto = Object.prototype;
-       /** Used to check objects for own properties. */
+           return false;
 
-       var hasOwnProperty$1 = objectProto.hasOwnProperty;
-       /**
-        * Used to resolve the
-        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-        * of values.
-        */
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-       var nativeObjectToString = objectProto.toString;
-       /** Built-in value references. */
+             if (osm) {
+               var missing = coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-       var symToStringTag = _Symbol ? _Symbol.toStringTag : undefined;
-       /**
-        * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
-        *
-        * @private
-        * @param {*} value The value to query.
-        * @returns {string} Returns the raw `toStringTag`.
-        */
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-       function getRawTag(value) {
-         var isOwn = hasOwnProperty$1.call(value, symToStringTag),
-             tag = value[symToStringTag];
+             return false;
+           }
 
-         try {
-           value[symToStringTag] = undefined;
-           var unmasked = true;
-         } catch (e) {}
+           function incompleteRelation(id) {
+             var entity = context.entity(id);
+             return entity.type === 'relation' && !entity.isComplete(context.graph());
+           }
+         };
 
-         var result = nativeObjectToString.call(value);
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.rotate.' + disable + '.' + multi) : _t('operations.rotate.description.' + multi);
+         };
 
-         if (unmasked) {
-           if (isOwn) {
-             value[symToStringTag] = tag;
-           } else {
-             delete value[symToStringTag];
-           }
-         }
+         operation.annotation = function () {
+           return selectedIDs.length === 1 ? _t('operations.rotate.annotation.' + context.graph().geometry(selectedIDs[0])) : _t('operations.rotate.annotation.feature', {
+             n: selectedIDs.length
+           });
+         };
 
-         return result;
+         operation.id = 'rotate';
+         operation.keys = [_t('operations.rotate.key')];
+         operation.title = _t('operations.rotate.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         operation.mouseOnly = true;
+         return operation;
        }
 
-       /** Used for built-in method references. */
-       var objectProto$1 = Object.prototype;
-       /**
-        * Used to resolve the
-        * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
-        * of values.
-        */
-
-       var nativeObjectToString$1 = objectProto$1.toString;
-       /**
-        * Converts `value` to a string using `Object.prototype.toString`.
-        *
-        * @private
-        * @param {*} value The value to convert.
-        * @returns {string} Returns the converted string.
-        */
+       function modeMove(context, entityIDs, baseGraph) {
+         var _tolerancePx = 4; // see also behaviorDrag, behaviorSelect, modeRotate
 
-       function objectToString$1(value) {
-         return nativeObjectToString$1.call(value);
-       }
+         var mode = {
+           id: 'move',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('move');
+         var behaviors = [behaviorEdit(context), operationCircularize(context, entityIDs).behavior, operationDelete(context, entityIDs).behavior, operationOrthogonalize(context, entityIDs).behavior, operationReflectLong(context, entityIDs).behavior, operationReflectShort(context, entityIDs).behavior, operationRotate(context, entityIDs).behavior];
+         var annotation = entityIDs.length === 1 ? _t('operations.move.annotation.' + context.graph().geometry(entityIDs[0])) : _t('operations.move.annotation.feature', {
+           n: entityIDs.length
+         });
 
-       /** `Object#toString` result references. */
+         var _prevGraph;
 
-       var nullTag = '[object Null]',
-           undefinedTag = '[object Undefined]';
-       /** Built-in value references. */
+         var _cache;
 
-       var symToStringTag$1 = _Symbol ? _Symbol.toStringTag : undefined;
-       /**
-        * The base implementation of `getTag` without fallbacks for buggy environments.
-        *
-        * @private
-        * @param {*} value The value to query.
-        * @returns {string} Returns the `toStringTag`.
-        */
+         var _origin;
 
-       function baseGetTag(value) {
-         if (value == null) {
-           return value === undefined ? undefinedTag : nullTag;
-         }
+         var _nudgeInterval; // use pointer events on supported platforms; fallback to mouse events
 
-         return symToStringTag$1 && symToStringTag$1 in Object(value) ? getRawTag(value) : objectToString$1(value);
-       }
 
-       /**
-        * Checks if `value` is object-like. A value is object-like if it's not `null`
-        * and has a `typeof` result of "object".
-        *
-        * @static
-        * @memberOf _
-        * @since 4.0.0
-        * @category Lang
-        * @param {*} value The value to check.
-        * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
-        * @example
-        *
-        * _.isObjectLike({});
-        * // => true
-        *
-        * _.isObjectLike([1, 2, 3]);
-        * // => true
-        *
-        * _.isObjectLike(_.noop);
-        * // => false
-        *
-        * _.isObjectLike(null);
-        * // => false
-        */
-       function isObjectLike(value) {
-         return value != null && _typeof(value) == 'object';
-       }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-       /** `Object#toString` result references. */
+         function doMove(nudge) {
+           nudge = nudge || [0, 0];
+           var fn;
 
-       var symbolTag = '[object Symbol]';
-       /**
-        * Checks if `value` is classified as a `Symbol` primitive or object.
-        *
-        * @static
-        * @memberOf _
-        * @since 4.0.0
-        * @category Lang
-        * @param {*} value The value to check.
-        * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
-        * @example
-        *
-        * _.isSymbol(Symbol.iterator);
-        * // => true
-        *
-        * _.isSymbol('abc');
-        * // => false
-        */
+           if (_prevGraph !== context.graph()) {
+             _cache = {};
+             _origin = context.map().mouseCoordinates();
+             fn = context.perform;
+           } else {
+             fn = context.overwrite;
+           }
 
-       function isSymbol$1(value) {
-         return _typeof(value) == 'symbol' || isObjectLike(value) && baseGetTag(value) == symbolTag;
-       }
+           var currMouse = context.map().mouse();
+           var origMouse = context.projection(_origin);
+           var delta = geoVecSubtract(geoVecSubtract(currMouse, origMouse), nudge);
+           fn(actionMove(entityIDs, delta, context.projection, _cache));
+           _prevGraph = context.graph();
+         }
 
-       /** Used as references for various `Number` constants. */
+         function startNudge(nudge) {
+           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+           _nudgeInterval = window.setInterval(function () {
+             context.map().pan(nudge);
+             doMove(nudge);
+           }, 50);
+         }
 
-       var NAN = 0 / 0;
-       /** Used to match leading and trailing whitespace. */
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;
+           }
+         }
 
-       var reTrim = /^\s+|\s+$/g;
-       /** Used to detect bad signed hexadecimal string values. */
+         function move() {
+           doMove();
+           var nudge = geoViewportEdge(context.map().mouse(), context.map().dimensions());
 
-       var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
-       /** Used to detect binary string values. */
+           if (nudge) {
+             startNudge(nudge);
+           } else {
+             stopNudge();
+           }
+         }
 
-       var reIsBinary = /^0b[01]+$/i;
-       /** Used to detect octal string values. */
+         function finish(d3_event) {
+           d3_event.stopPropagation();
+           context.replace(actionNoop(), annotation);
+           context.enter(modeSelect(context, entityIDs));
+           stopNudge();
+         }
 
-       var reIsOctal = /^0o[0-7]+$/i;
-       /** Built-in method references without a dependency on `root`. */
+         function cancel() {
+           if (baseGraph) {
+             while (context.graph() !== baseGraph) {
+               context.pop();
+             } // reset to baseGraph
 
-       var freeParseInt = parseInt;
-       /**
-        * Converts `value` to a number.
-        *
-        * @static
-        * @memberOf _
-        * @since 4.0.0
-        * @category Lang
-        * @param {*} value The value to process.
-        * @returns {number} Returns the number.
-        * @example
-        *
-        * _.toNumber(3.2);
-        * // => 3.2
-        *
-        * _.toNumber(Number.MIN_VALUE);
-        * // => 5e-324
-        *
-        * _.toNumber(Infinity);
-        * // => Infinity
-        *
-        * _.toNumber('3.2');
-        * // => 3.2
-        */
 
-       function toNumber$1(value) {
-         if (typeof value == 'number') {
-           return value;
-         }
+             context.enter(modeBrowse(context));
+           } else {
+             if (_prevGraph) context.pop(); // remove the move
 
-         if (isSymbol$1(value)) {
-           return NAN;
-         }
+             context.enter(modeSelect(context, entityIDs));
+           }
 
-         if (isObject$1(value)) {
-           var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
-           value = isObject$1(other) ? other + '' : other;
+           stopNudge();
          }
 
-         if (typeof value != 'string') {
-           return value === 0 ? value : +value;
+         function undone() {
+           context.enter(modeBrowse(context));
          }
 
-         value = value.replace(reTrim, '');
-         var isBinary = reIsBinary.test(value);
-         return isBinary || reIsOctal.test(value) ? freeParseInt(value.slice(2), isBinary ? 2 : 8) : reIsBadHex.test(value) ? NAN : +value;
-       }
+         mode.enter = function () {
+           _origin = context.map().mouseCoordinates();
+           _prevGraph = null;
+           _cache = {};
+           context.features().forceVisible(entityIDs);
+           behaviors.forEach(context.install);
+           var downEvent;
+           context.surface().on(_pointerPrefix + 'down.modeMove', function (d3_event) {
+             downEvent = d3_event;
+           });
+           select(window).on(_pointerPrefix + 'move.modeMove', move, true).on(_pointerPrefix + 'up.modeMove', function (d3_event) {
+             if (!downEvent) return;
+             var mapNode = context.container().select('.main-map').node();
+             var pointGetter = utilFastMouse(mapNode);
+             var p1 = pointGetter(downEvent);
+             var p2 = pointGetter(d3_event);
+             var dist = geoVecLength(p1, p2);
+             if (dist <= _tolerancePx) finish(d3_event);
+             downEvent = null;
+           }, true);
+           context.history().on('undone.modeMove', undone);
+           keybinding.on('⎋', cancel).on('↩', finish);
+           select(document).call(keybinding);
+         };
 
-       /** Error message constants. */
+         mode.exit = function () {
+           stopNudge();
+           behaviors.forEach(function (behavior) {
+             context.uninstall(behavior);
+           });
+           context.surface().on(_pointerPrefix + 'down.modeMove', null);
+           select(window).on(_pointerPrefix + 'move.modeMove', null, true).on(_pointerPrefix + 'up.modeMove', null, true);
+           context.history().on('undone.modeMove', null);
+           select(document).call(keybinding.unbind);
+           context.features().forceVisible([]);
+         };
 
-       var FUNC_ERROR_TEXT = 'Expected a function';
-       /* Built-in method references for those with the same name as other `lodash` methods. */
+         mode.selectedIDs = function () {
+           if (!arguments.length) return entityIDs; // no assign
 
-       var nativeMax = Math.max,
-           nativeMin = Math.min;
-       /**
-        * Creates a debounced function that delays invoking `func` until after `wait`
-        * milliseconds have elapsed since the last time the debounced function was
-        * invoked. The debounced function comes with a `cancel` method to cancel
-        * delayed `func` invocations and a `flush` method to immediately invoke them.
-        * Provide `options` to indicate whether `func` should be invoked on the
-        * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
-        * with the last arguments provided to the debounced function. Subsequent
-        * calls to the debounced function return the result of the last `func`
-        * invocation.
-        *
-        * **Note:** If `leading` and `trailing` options are `true`, `func` is
-        * invoked on the trailing edge of the timeout only if the debounced function
-        * is invoked more than once during the `wait` timeout.
-        *
-        * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-        * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-        *
-        * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-        * for details over the differences between `_.debounce` and `_.throttle`.
-        *
-        * @static
-        * @memberOf _
-        * @since 0.1.0
-        * @category Function
-        * @param {Function} func The function to debounce.
-        * @param {number} [wait=0] The number of milliseconds to delay.
-        * @param {Object} [options={}] The options object.
-        * @param {boolean} [options.leading=false]
-        *  Specify invoking on the leading edge of the timeout.
-        * @param {number} [options.maxWait]
-        *  The maximum time `func` is allowed to be delayed before it's invoked.
-        * @param {boolean} [options.trailing=true]
-        *  Specify invoking on the trailing edge of the timeout.
-        * @returns {Function} Returns the new debounced function.
-        * @example
-        *
-        * // Avoid costly calculations while the window size is in flux.
-        * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
-        *
-        * // Invoke `sendMail` when clicked, debouncing subsequent calls.
-        * jQuery(element).on('click', _.debounce(sendMail, 300, {
-        *   'leading': true,
-        *   'trailing': false
-        * }));
-        *
-        * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
-        * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
-        * var source = new EventSource('/stream');
-        * jQuery(source).on('message', debounced);
-        *
-        * // Cancel the trailing debounced invocation.
-        * jQuery(window).on('popstate', debounced.cancel);
-        */
+           return mode;
+         };
 
-       function debounce(func, wait, options) {
-         var lastArgs,
-             lastThis,
-             maxWait,
-             result,
-             timerId,
-             lastCallTime,
-             lastInvokeTime = 0,
-             leading = false,
-             maxing = false,
-             trailing = true;
+         return mode;
+       }
 
-         if (typeof func != 'function') {
-           throw new TypeError(FUNC_ERROR_TEXT);
-         }
+       function behaviorPaste(context) {
+         function doPaste(d3_event) {
+           // prevent paste during low zoom selection
+           if (!context.map().withinEditableZoom()) return;
+           d3_event.preventDefault();
+           var baseGraph = context.graph();
+           var mouse = context.map().mouse();
+           var projection = context.projection;
+           var viewport = geoExtent(projection.clipExtent()).polygon();
+           if (!geoPointInPolygon(mouse, viewport)) return;
+           var oldIDs = context.copyIDs();
+           if (!oldIDs.length) return;
+           var extent = geoExtent();
+           var oldGraph = context.copyGraph();
+           var newIDs = [];
+           var action = actionCopyEntities(oldIDs, oldGraph);
+           context.perform(action);
+           var copies = action.copies();
+           var originals = new Set();
+           Object.values(copies).forEach(function (entity) {
+             originals.add(entity.id);
+           });
 
-         wait = toNumber$1(wait) || 0;
+           for (var id in copies) {
+             var oldEntity = oldGraph.entity(id);
+             var newEntity = copies[id];
 
-         if (isObject$1(options)) {
-           leading = !!options.leading;
-           maxing = 'maxWait' in options;
-           maxWait = maxing ? nativeMax(toNumber$1(options.maxWait) || 0, wait) : maxWait;
-           trailing = 'trailing' in options ? !!options.trailing : trailing;
-         }
+             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-         function invokeFunc(time) {
-           var args = lastArgs,
-               thisArg = lastThis;
-           lastArgs = lastThis = undefined;
-           lastInvokeTime = time;
-           result = func.apply(thisArg, args);
-           return result;
-         }
 
-         function leadingEdge(time) {
-           // Reset any `maxWait` timer.
-           lastInvokeTime = time; // Start the timer for the trailing edge.
+             var parents = context.graph().parentWays(newEntity);
+             var parentCopied = parents.some(function (parent) {
+               return originals.has(parent.id);
+             });
 
-           timerId = setTimeout(timerExpired, wait); // Invoke the leading edge.
+             if (!parentCopied) {
+               newIDs.push(newEntity.id);
+             }
+           } // Put pasted objects where mouse pointer is..
 
-           return leading ? invokeFunc(time) : result;
-         }
 
-         function remainingWait(time) {
-           var timeSinceLastCall = time - lastCallTime,
-               timeSinceLastInvoke = time - lastInvokeTime,
-               timeWaiting = wait - timeSinceLastCall;
-           return maxing ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke) : timeWaiting;
+           var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+           var delta = geoVecSubtract(mouse, copyPoint);
+           context.perform(actionMove(newIDs, delta, projection));
+           context.enter(modeMove(context, newIDs, baseGraph));
          }
 
-         function shouldInvoke(time) {
-           var timeSinceLastCall = time - lastCallTime,
-               timeSinceLastInvoke = time - lastInvokeTime; // Either this is the first call, activity has stopped and we're at the
-           // trailing edge, the system time has gone backwards and we're treating
-           // it as the trailing edge, or we've hit the `maxWait` limit.
-
-           return lastCallTime === undefined || timeSinceLastCall >= wait || timeSinceLastCall < 0 || maxing && timeSinceLastInvoke >= maxWait;
+         function behavior() {
+           context.keybinding().on(uiCmd('⌘V'), doPaste);
+           return behavior;
          }
 
-         function timerExpired() {
-           var time = now$1();
+         behavior.off = function () {
+           context.keybinding().off(uiCmd('⌘V'));
+         };
 
-           if (shouldInvoke(time)) {
-             return trailingEdge(time);
-           } // Restart the timer.
+         return behavior;
+       }
 
+       /*
+           `behaviorDrag` is like `d3_behavior.drag`, with the following differences:
 
-           timerId = setTimeout(timerExpired, remainingWait(time));
-         }
+           * The `origin` function is expected to return an [x, y] tuple rather than an
+             {x, y} object.
+           * The events are `start`, `move`, and `end`.
+             (https://github.com/mbostock/d3/issues/563)
+           * The `start` event is not dispatched until the first cursor movement occurs.
+             (https://github.com/mbostock/d3/pull/368)
+           * The `move` event has a `point` and `delta` [x, y] tuple properties rather
+             than `x`, `y`, `dx`, and `dy` properties.
+           * The `end` event is not dispatched if no movement occurs.
+           * An `off` function is available that unbinds the drag's internal event handlers.
+        */
 
-         function trailingEdge(time) {
-           timerId = undefined; // Only invoke if we have `lastArgs` which means `func` has been
-           // debounced at least once.
+       function behaviorDrag() {
+         var dispatch = dispatch$8('start', 'move', 'end'); // see also behaviorSelect
 
-           if (trailing && lastArgs) {
-             return invokeFunc(time);
-           }
+         var _tolerancePx = 1; // keep this low to facilitate pixel-perfect micromapping
 
-           lastArgs = lastThis = undefined;
-           return result;
-         }
+         var _penTolerancePx = 4; // styluses can be touchy so require greater movement - #1981
 
-         function cancel() {
-           if (timerId !== undefined) {
-             clearTimeout(timerId);
-           }
+         var _origin = null;
+         var _selector = '';
 
-           lastInvokeTime = 0;
-           lastArgs = lastCallTime = lastThis = timerId = undefined;
-         }
+         var _targetNode;
 
-         function flush() {
-           return timerId === undefined ? result : trailingEdge(now$1());
-         }
+         var _targetEntity;
 
-         function debounced() {
-           var time = now$1(),
-               isInvoking = shouldInvoke(time);
-           lastArgs = arguments;
-           lastThis = this;
-           lastCallTime = time;
+         var _surface;
 
-           if (isInvoking) {
-             if (timerId === undefined) {
-               return leadingEdge(lastCallTime);
-             }
+         var _pointerId; // use pointer events on supported platforms; fallback to mouse events
 
-             if (maxing) {
-               // Handle invocations in a tight loop.
-               clearTimeout(timerId);
-               timerId = setTimeout(timerExpired, wait);
-               return invokeFunc(lastCallTime);
-             }
-           }
 
-           if (timerId === undefined) {
-             timerId = setTimeout(timerExpired, wait);
-           }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-           return result;
-         }
+         var d3_event_userSelectProperty = utilPrefixCSSProperty('UserSelect');
 
-         debounced.cancel = cancel;
-         debounced.flush = flush;
-         return debounced;
-       }
+         var d3_event_userSelectSuppress = function d3_event_userSelectSuppress() {
+           var selection$1 = selection();
+           var select = selection$1.style(d3_event_userSelectProperty);
+           selection$1.style(d3_event_userSelectProperty, 'none');
+           return function () {
+             selection$1.style(d3_event_userSelectProperty, select);
+           };
+         };
 
-       /** Error message constants. */
+         function pointerdown(d3_event) {
+           if (_pointerId) return;
+           _pointerId = d3_event.pointerId || 'mouse';
+           _targetNode = this; // only force reflow once per drag
 
-       var FUNC_ERROR_TEXT$1 = 'Expected a function';
-       /**
-        * Creates a throttled function that only invokes `func` at most once per
-        * every `wait` milliseconds. The throttled function comes with a `cancel`
-        * method to cancel delayed `func` invocations and a `flush` method to
-        * immediately invoke them. Provide `options` to indicate whether `func`
-        * should be invoked on the leading and/or trailing edge of the `wait`
-        * timeout. The `func` is invoked with the last arguments provided to the
-        * throttled function. Subsequent calls to the throttled function return the
-        * result of the last `func` invocation.
-        *
-        * **Note:** If `leading` and `trailing` options are `true`, `func` is
-        * invoked on the trailing edge of the timeout only if the throttled function
-        * is invoked more than once during the `wait` timeout.
-        *
-        * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
-        * until to the next tick, similar to `setTimeout` with a timeout of `0`.
-        *
-        * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
-        * for details over the differences between `_.throttle` and `_.debounce`.
-        *
-        * @static
-        * @memberOf _
-        * @since 0.1.0
-        * @category Function
-        * @param {Function} func The function to throttle.
-        * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
-        * @param {Object} [options={}] The options object.
-        * @param {boolean} [options.leading=true]
-        *  Specify invoking on the leading edge of the timeout.
-        * @param {boolean} [options.trailing=true]
-        *  Specify invoking on the trailing edge of the timeout.
-        * @returns {Function} Returns the new throttled function.
-        * @example
-        *
-        * // Avoid excessively updating the position while scrolling.
-        * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
-        *
-        * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
-        * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
-        * jQuery(element).on('click', throttled);
-        *
-        * // Cancel the trailing throttled invocation.
-        * jQuery(window).on('popstate', throttled.cancel);
-        */
+           var pointerLocGetter = utilFastMouse(_surface || _targetNode.parentNode);
+           var offset;
+           var startOrigin = pointerLocGetter(d3_event);
+           var started = false;
+           var selectEnable = d3_event_userSelectSuppress();
+           select(window).on(_pointerPrefix + 'move.drag', pointermove).on(_pointerPrefix + 'up.drag pointercancel.drag', pointerup, true);
 
-       function throttle(func, wait, options) {
-         var leading = true,
-             trailing = true;
+           if (_origin) {
+             offset = _origin.call(_targetNode, _targetEntity);
+             offset = [offset[0] - startOrigin[0], offset[1] - startOrigin[1]];
+           } else {
+             offset = [0, 0];
+           }
 
-         if (typeof func != 'function') {
-           throw new TypeError(FUNC_ERROR_TEXT$1);
-         }
+           d3_event.stopPropagation();
 
-         if (isObject$1(options)) {
-           leading = 'leading' in options ? !!options.leading : leading;
-           trailing = 'trailing' in options ? !!options.trailing : trailing;
-         }
+           function pointermove(d3_event) {
+             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+             var p = pointerLocGetter(d3_event);
 
-         return debounce(func, wait, {
-           'leading': leading,
-           'maxWait': wait,
-           'trailing': trailing
-         });
-       }
+             if (!started) {
+               var dist = geoVecLength(startOrigin, p);
+               var tolerance = d3_event.pointerType === 'pen' ? _penTolerancePx : _tolerancePx; // don't start until the drag has actually moved somewhat
 
-       var hashes = createCommonjsModule(function (module, exports) {
-         /**
-          * jshashes - https://github.com/h2non/jshashes
-          * Released under the "New BSD" license
-          *
-          * Algorithms specification:
-          *
-          * MD5 - http://www.ietf.org/rfc/rfc1321.txt
-          * RIPEMD-160 - http://homes.esat.kuleuven.be/~bosselae/ripemd160.html
-          * SHA1   - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-          * SHA256 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-          * SHA512 - http://csrc.nist.gov/publications/fips/fips180-4/fips-180-4.pdf
-          * HMAC - http://www.ietf.org/rfc/rfc2104.txt
-          */
-         (function () {
-           var Hashes;
+               if (dist < tolerance) return;
+               started = true;
+               dispatch.call('start', this, d3_event, _targetEntity); // Don't send a `move` event in the same cycle as `start` since dragging
+               // a midpoint will convert the target to a node.
+             } else {
+               startOrigin = p;
+               d3_event.stopPropagation();
+               d3_event.preventDefault();
+               var dx = p[0] - startOrigin[0];
+               var dy = p[1] - startOrigin[1];
+               dispatch.call('move', this, d3_event, _targetEntity, [p[0] + offset[0], p[1] + offset[1]], [dx, dy]);
+             }
+           }
 
-           function utf8Encode(str) {
-             var x,
-                 y,
-                 output = '',
-                 i = -1,
-                 l;
+           function pointerup(d3_event) {
+             if (_pointerId !== (d3_event.pointerId || 'mouse')) return;
+             _pointerId = null;
 
-             if (str && str.length) {
-               l = str.length;
+             if (started) {
+               dispatch.call('end', this, d3_event, _targetEntity);
+               d3_event.preventDefault();
+             }
 
-               while ((i += 1) < l) {
-                 /* Decode utf-16 surrogate pairs */
-                 x = str.charCodeAt(i);
-                 y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
+             select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+             selectEnable();
+           }
+         }
 
-                 if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
-                   x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
-                   i += 1;
-                 }
-                 /* Encode output as utf-8 */
+         function behavior(selection) {
+           var matchesSelector = utilPrefixDOMProperty('matchesSelector');
+           var delegate = pointerdown;
 
+           if (_selector) {
+             delegate = function delegate(d3_event) {
+               var root = this;
+               var target = d3_event.target;
 
-                 if (x <= 0x7F) {
-                   output += String.fromCharCode(x);
-                 } else if (x <= 0x7FF) {
-                   output += String.fromCharCode(0xC0 | x >>> 6 & 0x1F, 0x80 | x & 0x3F);
-                 } else if (x <= 0xFFFF) {
-                   output += String.fromCharCode(0xE0 | x >>> 12 & 0x0F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
-                 } else if (x <= 0x1FFFFF) {
-                   output += String.fromCharCode(0xF0 | x >>> 18 & 0x07, 0x80 | x >>> 12 & 0x3F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+               for (; target && target !== root; target = target.parentNode) {
+                 var datum = target.__data__;
+                 _targetEntity = datum instanceof osmNote ? datum : datum && datum.properties && datum.properties.entity;
+
+                 if (_targetEntity && target[matchesSelector](_selector)) {
+                   return pointerdown.call(target, d3_event);
                  }
                }
-             }
-
-             return output;
+             };
            }
 
-           function utf8Decode(str) {
-             var i,
-                 ac,
-                 c1,
-                 c2,
-                 c3,
-                 arr = [],
-                 l;
-             i = ac = c1 = c2 = c3 = 0;
+           selection.on(_pointerPrefix + 'down.drag' + _selector, delegate);
+         }
 
-             if (str && str.length) {
-               l = str.length;
-               str += '';
+         behavior.off = function (selection) {
+           selection.on(_pointerPrefix + 'down.drag' + _selector, null);
+         };
 
-               while (i < l) {
-                 c1 = str.charCodeAt(i);
-                 ac += 1;
+         behavior.selector = function (_) {
+           if (!arguments.length) return _selector;
+           _selector = _;
+           return behavior;
+         };
 
-                 if (c1 < 128) {
-                   arr[ac] = String.fromCharCode(c1);
-                   i += 1;
-                 } else if (c1 > 191 && c1 < 224) {
-                   c2 = str.charCodeAt(i + 1);
-                   arr[ac] = String.fromCharCode((c1 & 31) << 6 | c2 & 63);
-                   i += 2;
-                 } else {
-                   c2 = str.charCodeAt(i + 1);
-                   c3 = str.charCodeAt(i + 2);
-                   arr[ac] = String.fromCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
-                   i += 3;
-                 }
-               }
-             }
+         behavior.origin = function (_) {
+           if (!arguments.length) return _origin;
+           _origin = _;
+           return behavior;
+         };
 
-             return arr.join('');
-           }
-           /**
-            * Add integers, wrapping at 2^32. This uses 16-bit operations internally
-            * to work around bugs in some JS interpreters.
-            */
+         behavior.cancel = function () {
+           select(window).on(_pointerPrefix + 'move.drag', null).on(_pointerPrefix + 'up.drag pointercancel.drag', null);
+           return behavior;
+         };
 
+         behavior.targetNode = function (_) {
+           if (!arguments.length) return _targetNode;
+           _targetNode = _;
+           return behavior;
+         };
 
-           function safe_add(x, y) {
-             var lsw = (x & 0xFFFF) + (y & 0xFFFF),
-                 msw = (x >> 16) + (y >> 16) + (lsw >> 16);
-             return msw << 16 | lsw & 0xFFFF;
-           }
-           /**
-            * Bitwise rotate a 32-bit number to the left.
-            */
+         behavior.targetEntity = function (_) {
+           if (!arguments.length) return _targetEntity;
+           _targetEntity = _;
+           return behavior;
+         };
 
+         behavior.surface = function (_) {
+           if (!arguments.length) return _surface;
+           _surface = _;
+           return behavior;
+         };
 
-           function bit_rol(num, cnt) {
-             return num << cnt | num >>> 32 - cnt;
-           }
-           /**
-            * Convert a raw string to a hex string
-            */
+         return utilRebind(behavior, dispatch, 'on');
+       }
 
+       function modeDragNode(context) {
+         var mode = {
+           id: 'drag-node',
+           button: 'browse'
+         };
+         var hover = behaviorHover(context).altDisables(true).on('hover', context.ui().sidebar.hover);
+         var edit = behaviorEdit(context);
 
-           function rstr2hex(input, hexcase) {
-             var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
-                 output = '',
-                 x,
-                 i = 0,
-                 l = input.length;
+         var _nudgeInterval;
 
-             for (; i < l; i += 1) {
-               x = input.charCodeAt(i);
-               output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
-             }
+         var _restoreSelectedIDs = [];
+         var _wasMidpoint = false;
+         var _isCancelled = false;
 
-             return output;
-           }
-           /**
-            * Convert an array of big-endian words to a string
-            */
+         var _activeEntity;
 
+         var _startLoc;
 
-           function binb2rstr(input) {
-             var i,
-                 l = input.length * 32,
-                 output = '';
+         var _lastLoc;
 
-             for (i = 0; i < l; i += 8) {
-               output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
-             }
+         function startNudge(d3_event, entity, nudge) {
+           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+           _nudgeInterval = window.setInterval(function () {
+             context.map().pan(nudge);
+             doMove(d3_event, entity, nudge);
+           }, 50);
+         }
 
-             return output;
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;
            }
-           /**
-            * Convert an array of little-endian words to a string
-            */
+         }
 
+         function moveAnnotation(entity) {
+           return _t('operations.move.annotation.' + entity.geometry(context.graph()));
+         }
 
-           function binl2rstr(input) {
-             var i,
-                 l = input.length * 32,
-                 output = '';
+         function connectAnnotation(nodeEntity, targetEntity) {
+           var nodeGeometry = nodeEntity.geometry(context.graph());
+           var targetGeometry = targetEntity.geometry(context.graph());
 
-             for (i = 0; i < l; i += 8) {
-               output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
-             }
+           if (nodeGeometry === 'vertex' && targetGeometry === 'vertex') {
+             var nodeParentWayIDs = context.graph().parentWays(nodeEntity);
+             var targetParentWayIDs = context.graph().parentWays(targetEntity);
+             var sharedParentWays = utilArrayIntersection(nodeParentWayIDs, targetParentWayIDs); // if both vertices are part of the same way
 
-             return output;
+             if (sharedParentWays.length !== 0) {
+               // if the nodes are next to each other, they are merged
+               if (sharedParentWays[0].areAdjacent(nodeEntity.id, targetEntity.id)) {
+                 return _t('operations.connect.annotation.from_vertex.to_adjacent_vertex');
+               }
+
+               return _t('operations.connect.annotation.from_vertex.to_sibling_vertex');
+             }
            }
-           /**
-            * Convert a raw string to an array of little-endian words
-            * Characters >255 have their high-byte silently ignored.
-            */
 
+           return _t('operations.connect.annotation.from_' + nodeGeometry + '.to_' + targetGeometry);
+         }
 
-           function rstr2binl(input) {
-             var i,
-                 l = input.length * 8,
-                 output = Array(input.length >> 2),
-                 lo = output.length;
+         function shouldSnapToNode(target) {
+           if (!_activeEntity) return false;
+           return _activeEntity.geometry(context.graph()) !== 'vertex' || target.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(target, context.graph());
+         }
 
-             for (i = 0; i < lo; i += 1) {
-               output[i] = 0;
+         function origin(entity) {
+           return context.projection(entity.loc);
+         }
+
+         function keydown(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope')) {
+               context.surface().classed('nope-suppressed', true);
              }
 
-             for (i = 0; i < l; i += 8) {
-               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
+             context.surface().classed('nope', false).classed('nope-disabled', true);
+           }
+         }
+
+         function keyup(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope-suppressed')) {
+               context.surface().classed('nope', true);
              }
 
-             return output;
+             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
            }
-           /**
-            * Convert a raw string to an array of big-endian words
-            * Characters >255 have their high-byte silently ignored.
-            */
-
-
-           function rstr2binb(input) {
-             var i,
-                 l = input.length * 8,
-                 output = Array(input.length >> 2),
-                 lo = output.length;
+         }
 
-             for (i = 0; i < lo; i += 1) {
-               output[i] = 0;
-             }
+         function start(d3_event, entity) {
+           _wasMidpoint = entity.type === 'midpoint';
+           var hasHidden = context.features().hasHiddenConnections(entity, context.graph());
+           _isCancelled = !context.editable() || d3_event.shiftKey || hasHidden;
 
-             for (i = 0; i < l; i += 8) {
-               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+           if (_isCancelled) {
+             if (hasHidden) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t('modes.drag_node.connected_to_hidden'))();
              }
 
-             return output;
+             return drag.cancel();
            }
-           /**
-            * Convert a raw string to an arbitrary string encoding
-            */
 
+           if (_wasMidpoint) {
+             var midpoint = entity;
+             entity = osmNode();
+             context.perform(actionAddMidpoint(midpoint, entity));
+             entity = context.entity(entity.id); // get post-action entity
 
-           function rstr2any(input, encoding) {
-             var divisor = encoding.length,
-                 remainders = Array(),
-                 i,
-                 q,
-                 x,
-                 ld,
-                 quotient,
-                 dividend,
-                 output,
-                 full_length;
-             /* Convert to an array of 16-bit big-endian values, forming the dividend */
+             var vertex = context.surface().selectAll('.' + entity.id);
+             drag.targetNode(vertex.node()).targetEntity(entity);
+           } else {
+             context.perform(actionNoop());
+           }
 
-             dividend = Array(Math.ceil(input.length / 2));
-             ld = dividend.length;
+           _activeEntity = entity;
+           _startLoc = entity.loc;
+           hover.ignoreVertex(entity.geometry(context.graph()) === 'vertex');
+           context.surface().selectAll('.' + _activeEntity.id).classed('active', true);
+           context.enter(mode);
+         } // related code
+         // - `behavior/draw.js` `datum()`
 
-             for (i = 0; i < ld; i += 1) {
-               dividend[i] = input.charCodeAt(i * 2) << 8 | input.charCodeAt(i * 2 + 1);
-             }
-             /**
-              * Repeatedly perform a long division. The binary array forms the dividend,
-              * the length of the encoding is the divisor. Once computed, the quotient
-              * forms the dividend for the next step. We stop when the dividend is zerHashes.
-              * All remainders are stored for later use.
-              */
 
+         function datum(d3_event) {
+           if (!d3_event || d3_event.altKey) {
+             return {};
+           } else {
+             // When dragging, snap only to touch targets..
+             // (this excludes area fills and active drawing elements)
+             var d = d3_event.target.__data__;
+             return d && d.properties && d.properties.target ? d : {};
+           }
+         }
 
-             while (dividend.length > 0) {
-               quotient = Array();
-               x = 0;
+         function doMove(d3_event, entity, nudge) {
+           nudge = nudge || [0, 0];
+           var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+           var currMouse = geoVecSubtract(currPoint, nudge);
+           var loc = context.projection.invert(currMouse);
+           var target, edge;
 
-               for (i = 0; i < dividend.length; i += 1) {
-                 x = (x << 16) + dividend[i];
-                 q = Math.floor(x / divisor);
-                 x -= q * divisor;
+           if (!_nudgeInterval) {
+             // If not nudging at the edge of the viewport, try to snap..
+             // related code
+             // - `mode/drag_node.js`     `doMove()`
+             // - `behavior/draw.js`      `click()`
+             // - `behavior/draw_way.js`  `move()`
+             var d = datum(d3_event);
+             target = d && d.properties && d.properties.entity;
+             var targetLoc = target && target.loc;
+             var targetNodes = d && d.properties && d.properties.nodes;
 
-                 if (quotient.length > 0 || q > 0) {
-                   quotient[quotient.length] = q;
-                 }
+             if (targetLoc) {
+               // snap to node/vertex - a point target with `.loc`
+               if (shouldSnapToNode(target)) {
+                 loc = targetLoc;
                }
+             } else if (targetNodes) {
+               // snap to way - a line target with `.nodes`
+               edge = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, end.id);
 
-               remainders[remainders.length] = x;
-               dividend = quotient;
+               if (edge) {
+                 loc = edge.loc;
+               }
              }
-             /* Convert the remainders to the output string */
-
-
-             output = '';
+           }
 
-             for (i = remainders.length - 1; i >= 0; i--) {
-               output += encoding.charAt(remainders[i]);
-             }
-             /* Append leading zero equivalents */
+           context.replace(actionMoveNode(entity.id, loc)); // Below here: validations
 
+           var isInvalid = false; // Check if this connection to `target` could cause relations to break..
 
-             full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
+           if (target) {
+             isInvalid = hasRelationConflict(entity, target, edge, context.graph());
+           } // Check if this drag causes the geometry to break..
 
-             for (i = output.length; i < full_length; i += 1) {
-               output = encoding[0] + output;
-             }
 
-             return output;
+           if (!isInvalid) {
+             isInvalid = hasInvalidGeometry(entity, context.graph());
            }
-           /**
-            * Convert a raw string to a base-64 string
-            */
-
 
-           function rstr2b64(input, b64pad) {
-             var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-                 output = '',
-                 len = input.length,
-                 i,
-                 j,
-                 triplet;
-             b64pad = b64pad || '=';
-
-             for (i = 0; i < len; i += 3) {
-               triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
+           var nope = context.surface().classed('nope');
 
-               for (j = 0; j < 4; j += 1) {
-                 if (i * 8 + j * 6 > input.length * 8) {
-                   output += b64pad;
-                 } else {
-                   output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
-                 }
-               }
+           if (isInvalid === 'relation' || isInvalid === 'restriction') {
+             if (!nope) {
+               // about to nope - show hint
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html('operations.connect.' + isInvalid, {
+                 relation: _mainPresetIndex.item('type/restriction').name()
+               }))();
+             }
+           } else if (isInvalid) {
+             var errorID = isInvalid === 'line' ? 'lines' : 'areas';
+             context.ui().flash.duration(3000).iconName('#iD-icon-no').label(_t.html('self_intersection.error.' + errorID))();
+           } else {
+             if (nope) {
+               // about to un-nope, remove hint
+               context.ui().flash.duration(1).label('')();
              }
-
-             return output;
            }
 
-           Hashes = {
-             /**
-              * @property {String} version
-              * @readonly
-              */
-             VERSION: '1.0.6',
+           var nopeDisabled = context.surface().classed('nope-disabled');
 
-             /**
-              * @member Hashes
-              * @class Base64
-              * @constructor
-              */
-             Base64: function Base64() {
-               // private properties
-               var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
-                   pad = '=',
-                   // URL encoding support @todo
-               utf8 = true; // by default enable UTF-8 support encoding
-               // public method for encoding
+           if (nopeDisabled) {
+             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+           } else {
+             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+           }
 
-               this.encode = function (input) {
-                 var i,
-                     j,
-                     triplet,
-                     output = '',
-                     len = input.length;
-                 pad = pad || '=';
-                 input = utf8 ? utf8Encode(input) : input;
+           _lastLoc = loc;
+         } // Uses `actionConnect.disabled()` to know whether this connection is ok..
 
-                 for (i = 0; i < len; i += 3) {
-                   triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
 
-                   for (j = 0; j < 4; j += 1) {
-                     if (i * 8 + j * 6 > len * 8) {
-                       output += pad;
-                     } else {
-                       output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
-                     }
-                   }
-                 }
+         function hasRelationConflict(entity, target, edge, graph) {
+           var testGraph = graph.update(); // copy
+           // if snapping to way - add midpoint there and consider that the target..
 
-                 return output;
-               }; // public method for decoding
+           if (edge) {
+             var midpoint = osmNode();
+             var action = actionAddMidpoint({
+               loc: edge.loc,
+               edge: [target.nodes[edge.index - 1], target.nodes[edge.index]]
+             }, midpoint);
+             testGraph = action(testGraph);
+             target = midpoint;
+           } // can we connect to it?
 
 
-               this.decode = function (input) {
-                 // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
-                 var i,
-                     o1,
-                     o2,
-                     o3,
-                     h1,
-                     h2,
-                     h3,
-                     h4,
-                     bits,
-                     ac,
-                     dec = '',
-                     arr = [];
+           var ids = [entity.id, target.id];
+           return actionConnect(ids).disabled(testGraph);
+         }
 
-                 if (!input) {
-                   return input;
-                 }
+         function hasInvalidGeometry(entity, graph) {
+           var parents = graph.parentWays(entity);
+           var i, j, k;
 
-                 i = ac = 0;
-                 input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
-                 //input += '';
+           for (i = 0; i < parents.length; i++) {
+             var parent = parents[i];
+             var nodes = [];
+             var activeIndex = null; // which multipolygon ring contains node being dragged
+             // test any parent multipolygons for valid geometry
 
-                 do {
-                   // unpack four hexets into three octets using index points in b64
-                   h1 = tab.indexOf(input.charAt(i += 1));
-                   h2 = tab.indexOf(input.charAt(i += 1));
-                   h3 = tab.indexOf(input.charAt(i += 1));
-                   h4 = tab.indexOf(input.charAt(i += 1));
-                   bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
-                   o1 = bits >> 16 & 0xff;
-                   o2 = bits >> 8 & 0xff;
-                   o3 = bits & 0xff;
-                   ac += 1;
+             var relations = graph.parentRelations(parent);
 
-                   if (h3 === 64) {
-                     arr[ac] = String.fromCharCode(o1);
-                   } else if (h4 === 64) {
-                     arr[ac] = String.fromCharCode(o1, o2);
-                   } else {
-                     arr[ac] = String.fromCharCode(o1, o2, o3);
-                   }
-                 } while (i < input.length);
+             for (j = 0; j < relations.length; j++) {
+               if (!relations[j].isMultipolygon()) continue;
+               var rings = osmJoinWays(relations[j].members, graph); // find active ring and test it for self intersections
 
-                 dec = arr.join('');
-                 dec = utf8 ? utf8Decode(dec) : dec;
-                 return dec;
-               }; // set custom pad string
+               for (k = 0; k < rings.length; k++) {
+                 nodes = rings[k].nodes;
 
+                 if (nodes.find(function (n) {
+                   return n.id === entity.id;
+                 })) {
+                   activeIndex = k;
 
-               this.setPad = function (str) {
-                 pad = str || pad;
-                 return this;
-               }; // set custom tab string characters
+                   if (geoHasSelfIntersections(nodes, entity.id)) {
+                     return 'multipolygonMember';
+                   }
+                 }
 
+                 rings[k].coords = nodes.map(function (n) {
+                   return n.loc;
+                 });
+               } // test active ring for intersections with other rings in the multipolygon
 
-               this.setTab = function (str) {
-                 tab = str || tab;
-                 return this;
-               };
 
-               this.setUTF8 = function (bool) {
-                 if (typeof bool === 'boolean') {
-                   utf8 = bool;
-                 }
+               for (k = 0; k < rings.length; k++) {
+                 if (k === activeIndex) continue; // make sure active ring doesn't cross passive rings
 
-                 return this;
-               };
-             },
+                 if (geoHasLineIntersections(rings[activeIndex].nodes, rings[k].nodes, entity.id)) {
+                   return 'multipolygonRing';
+                 }
+               }
+             } // If we still haven't tested this node's parent way for self-intersections.
+             // (because it's not a member of a multipolygon), test it now.
 
-             /**
-              * CRC-32 calculation
-              * @member Hashes
-              * @method CRC32
-              * @static
-              * @param {String} str Input String
-              * @return {String}
-              */
-             CRC32: function CRC32(str) {
-               var crc = 0,
-                   x = 0,
-                   y = 0,
-                   table,
-                   i,
-                   iTop;
-               str = utf8Encode(str);
-               table = ['00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ', '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ', '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ', '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ', 'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ', '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ', 'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ', '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ', 'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ', '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ', 'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ', '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ', 'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ', '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ', '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ', '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ', '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ', 'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ', '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ', 'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ', '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ', 'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ', '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ', 'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ', '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ', 'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'].join('');
-               crc = crc ^ -1;
 
-               for (i = 0, iTop = str.length; i < iTop; i += 1) {
-                 y = (crc ^ str.charCodeAt(i)) & 0xFF;
-                 x = '0x' + table.substr(y * 9, 8);
-                 crc = crc >>> 8 ^ x;
-               } // always return a positive number (that's what >>> 0 does)
+             if (activeIndex === null) {
+               nodes = parent.nodes.map(function (nodeID) {
+                 return graph.entity(nodeID);
+               });
 
+               if (nodes.length && geoHasSelfIntersections(nodes, entity.id)) {
+                 return parent.geometry(graph);
+               }
+             }
+           }
 
-               return (crc ^ -1) >>> 0;
-             },
+           return false;
+         }
 
-             /**
-              * @member Hashes
-              * @class MD5
-              * @constructor
-              * @param {Object} [config]
-              *
-              * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
-              * Digest Algorithm, as defined in RFC 1321.
-              * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
-              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-              * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
-              */
-             MD5: function MD5(options) {
-               /**
-                * Private config properties. You may need to tweak these to be compatible with
-                * the server-side, but the defaults work in most cases.
-                * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
-                */
-               var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
-                   // hexadecimal output case format. false - lowercase; true - uppercase
-               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
-                   // base-64 pad character. Defaults to '=' for strict RFC compliance
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
-               // privileged (public) methods
+         function move(d3_event, entity, point) {
+           if (_isCancelled) return;
+           d3_event.stopPropagation();
+           context.surface().classed('nope-disabled', d3_event.altKey);
+           _lastLoc = context.projection.invert(point);
+           doMove(d3_event, entity);
+           var nudge = geoViewportEdge(point, context.map().dimensions());
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s), hexcase);
-               };
+           if (nudge) {
+             startNudge(d3_event, entity, nudge);
+           } else {
+             stopNudge();
+           }
+         }
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+         function end(d3_event, entity) {
+           if (_isCancelled) return;
+           var wasPoint = entity.geometry(context.graph()) === 'point';
+           var d = datum(d3_event);
+           var nope = d && d.properties && d.properties.nope || context.surface().classed('nope');
+           var target = d && d.properties && d.properties.entity; // entity to snap to
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+           if (nope) {
+             // bounce back
+             context.perform(_actionBounceBack(entity.id, _startLoc));
+           } else if (target && target.type === 'way') {
+             var choice = geoChooseEdge(context.graph().childNodes(target), context.map().mouse(), context.projection, entity.id);
+             context.replace(actionAddMidpoint({
+               loc: choice.loc,
+               edge: [target.nodes[choice.index - 1], target.nodes[choice.index]]
+             }, entity), connectAnnotation(entity, target));
+           } else if (target && target.type === 'node' && shouldSnapToNode(target)) {
+             context.replace(actionConnect([target.id, entity.id]), connectAnnotation(entity, target));
+           } else if (_wasMidpoint) {
+             context.replace(actionNoop(), _t('operations.add.annotation.vertex'));
+           } else {
+             context.replace(actionNoop(), moveAnnotation(entity));
+           }
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+           if (wasPoint) {
+             context.enter(modeSelect(context, [entity.id]));
+           } else {
+             var reselection = _restoreSelectedIDs.filter(function (id) {
+               return context.graph().hasEntity(id);
+             });
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d), hexcase);
-               };
+             if (reselection.length) {
+               context.enter(modeSelect(context, reselection));
+             } else {
+               context.enter(modeBrowse(context));
+             }
+           }
+         }
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+         function _actionBounceBack(nodeID, toLoc) {
+           var moveNode = actionMoveNode(nodeID, toLoc);
 
-               this.any_hmac = function (k, d, e) {
-                 return rstr2any(rstr_hmac(k, d), e);
-               };
-               /**
-                * Perform a simple self-test to see if the VM is working
-                * @return {String} Hexadecimal hash sample
-                */
+           var action = function action(graph, t) {
+             // last time through, pop off the bounceback perform.
+             // it will then overwrite the initial perform with a moveNode that does nothing
+             if (t === 1) context.pop();
+             return moveNode(graph, t);
+           };
 
+           action.transitionable = true;
+           return action;
+         }
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * Enable/disable uppercase hexadecimal returned string
-                * @param {Boolean}
-                * @return {Object} this
-                */
+         function cancel() {
+           drag.cancel();
+           context.enter(modeBrowse(context));
+         }
 
+         var drag = behaviorDrag().selector('.layer-touch.points .target').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+         mode.enter = function () {
+           context.install(hover);
+           context.install(edit);
+           select(window).on('keydown.dragNode', keydown).on('keyup.dragNode', keyup);
+           context.history().on('undone.drag-node', cancel);
+         };
 
-                 return this;
-               };
-               /**
-                * Defines a base64 pad string
-                * @param {String} Pad
-                * @return {Object} this
-                */
+         mode.exit = function () {
+           context.ui().sidebar.hover.cancel();
+           context.uninstall(hover);
+           context.uninstall(edit);
+           select(window).on('keydown.dragNode', null).on('keyup.dragNode', null);
+           context.history().on('undone.drag-node', null);
+           _activeEntity = null;
+           context.surface().classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false).selectAll('.active').classed('active', false);
+           stopNudge();
+         };
 
+         mode.selectedIDs = function () {
+           if (!arguments.length) return _activeEntity ? [_activeEntity.id] : []; // no assign
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * Defines a base64 pad string
-                * @param {Boolean}
-                * @return {Object} [this]
-                */
+           return mode;
+         };
 
+         mode.activeID = function () {
+           if (!arguments.length) return _activeEntity && _activeEntity.id; // no assign
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+           return mode;
+         };
 
-                 return this;
-               }; // private methods
+         mode.restoreSelectedIDs = function (_) {
+           if (!arguments.length) return _restoreSelectedIDs;
+           _restoreSelectedIDs = _;
+           return mode;
+         };
 
-               /**
-                * Calculate the MD5 of a raw string
-                */
+         mode.behavior = drag;
+         return mode;
+       }
 
+       var $$3 = _export;
+       var NativePromise = nativePromiseConstructor;
+       var fails$1 = fails$S;
+       var getBuiltIn = getBuiltIn$b;
+       var isCallable = isCallable$r;
+       var speciesConstructor = speciesConstructor$5;
+       var promiseResolve = promiseResolve$2;
+       var redefine$1 = redefine$h.exports;
 
-               function rstr(s) {
-                 s = utf8 ? utf8Encode(s) : s;
-                 return binl2rstr(binl(rstr2binl(s), s.length * 8));
-               }
-               /**
-                * Calculate the HMAC-MD5, of a key and some data (raw strings)
-                */
+       // Safari bug https://bugs.webkit.org/show_bug.cgi?id=200829
+       var NON_GENERIC = !!NativePromise && fails$1(function () {
+         NativePromise.prototype['finally'].call({ then: function () { /* empty */ } }, function () { /* empty */ });
+       });
 
+       // `Promise.prototype.finally` method
+       // https://tc39.es/ecma262/#sec-promise.prototype.finally
+       $$3({ target: 'Promise', proto: true, real: true, forced: NON_GENERIC }, {
+         'finally': function (onFinally) {
+           var C = speciesConstructor(this, getBuiltIn('Promise'));
+           var isFunction = isCallable(onFinally);
+           return this.then(
+             isFunction ? function (x) {
+               return promiseResolve(C, onFinally()).then(function () { return x; });
+             } : onFinally,
+             isFunction ? function (e) {
+               return promiseResolve(C, onFinally()).then(function () { throw e; });
+             } : onFinally
+           );
+         }
+       });
 
-               function rstr_hmac(key, data) {
-                 var bkey, ipad, opad, hash, i;
-                 key = utf8 ? utf8Encode(key) : key;
-                 data = utf8 ? utf8Encode(data) : data;
-                 bkey = rstr2binl(key);
+       // makes sure that native promise-based APIs `Promise#finally` properly works with patched `Promise#then`
+       if (isCallable(NativePromise)) {
+         var method = getBuiltIn('Promise').prototype['finally'];
+         if (NativePromise.prototype['finally'] !== method) {
+           redefine$1(NativePromise.prototype, 'finally', method, { unsafe: true });
+         }
+       }
 
-                 if (bkey.length > 16) {
-                   bkey = binl(bkey, key.length * 8);
-                 }
+       function quickselect(arr, k, left, right, compare) {
+         quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
+       }
 
-                 ipad = Array(16), opad = Array(16);
+       function quickselectStep(arr, k, left, right, compare) {
+         while (right > left) {
+           if (right - left > 600) {
+             var n = right - left + 1;
+             var m = k - left + 1;
+             var z = Math.log(n);
+             var s = 0.5 * Math.exp(2 * z / 3);
+             var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
+             var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
+             var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
+             quickselectStep(arr, k, newLeft, newRight, compare);
+           }
 
-                 for (i = 0; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+           var t = arr[k];
+           var i = left;
+           var j = right;
+           swap(arr, left, k);
+           if (compare(arr[right], t) > 0) swap(arr, left, right);
 
-                 hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-                 return binl2rstr(binl(opad.concat(hash), 512 + 128));
-               }
-               /**
-                * Calculate the MD5 of an array of little-endian words, and a bit length.
-                */
+           while (i < j) {
+             swap(arr, i, j);
+             i++;
+             j--;
 
+             while (compare(arr[i], t) < 0) {
+               i++;
+             }
 
-               function binl(x, len) {
-                 var i,
-                     olda,
-                     oldb,
-                     oldc,
-                     oldd,
-                     a = 1732584193,
-                     b = -271733879,
-                     c = -1732584194,
-                     d = 271733878;
-                 /* append padding */
+             while (compare(arr[j], t) > 0) {
+               j--;
+             }
+           }
 
-                 x[len >> 5] |= 0x80 << len % 32;
-                 x[(len + 64 >>> 9 << 4) + 14] = len;
+           if (compare(arr[left], t) === 0) swap(arr, left, j);else {
+             j++;
+             swap(arr, j, right);
+           }
+           if (j <= k) left = j + 1;
+           if (k <= j) right = j - 1;
+         }
+       }
 
-                 for (i = 0; i < x.length; i += 16) {
-                   olda = a;
-                   oldb = b;
-                   oldc = c;
-                   oldd = d;
-                   a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
-                   d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
-                   c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
-                   b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
-                   a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
-                   d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
-                   c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
-                   b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
-                   a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
-                   d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
-                   c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
-                   b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
-                   a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
-                   d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
-                   c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
-                   b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
-                   a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
-                   d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
-                   c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
-                   b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
-                   a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
-                   d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
-                   c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
-                   b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
-                   a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
-                   d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
-                   c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
-                   b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
-                   a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
-                   d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
-                   c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
-                   b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
-                   a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
-                   d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
-                   c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
-                   b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
-                   a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
-                   d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
-                   c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
-                   b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
-                   a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
-                   d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
-                   c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
-                   b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
-                   a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
-                   d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
-                   c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
-                   b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
-                   a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
-                   d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
-                   c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
-                   b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
-                   a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
-                   d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
-                   c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
-                   b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
-                   a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
-                   d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
-                   c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
-                   b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
-                   a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
-                   d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
-                   c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
-                   b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
-                   a = safe_add(a, olda);
-                   b = safe_add(b, oldb);
-                   c = safe_add(c, oldc);
-                   d = safe_add(d, oldd);
-                 }
+       function swap(arr, i, j) {
+         var tmp = arr[i];
+         arr[i] = arr[j];
+         arr[j] = tmp;
+       }
 
-                 return Array(a, b, c, d);
-               }
-               /**
-                * These functions implement the four basic operations the algorithm uses.
-                */
+       function defaultCompare(a, b) {
+         return a < b ? -1 : a > b ? 1 : 0;
+       }
 
+       var RBush = /*#__PURE__*/function () {
+         function RBush() {
+           var maxEntries = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : 9;
 
-               function md5_cmn(q, a, b, x, s, t) {
-                 return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
-               }
+           _classCallCheck$1(this, RBush);
 
-               function md5_ff(a, b, c, d, x, s, t) {
-                 return md5_cmn(b & c | ~b & d, a, b, x, s, t);
-               }
+           // max entries in a node is 9 by default; min node fill is 40% for best performance
+           this._maxEntries = Math.max(4, maxEntries);
+           this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+           this.clear();
+         }
 
-               function md5_gg(a, b, c, d, x, s, t) {
-                 return md5_cmn(b & d | c & ~d, a, b, x, s, t);
-               }
+         _createClass$1(RBush, [{
+           key: "all",
+           value: function all() {
+             return this._all(this.data, []);
+           }
+         }, {
+           key: "search",
+           value: function search(bbox) {
+             var node = this.data;
+             var result = [];
+             if (!intersects(bbox, node)) return result;
+             var toBBox = this.toBBox;
+             var nodesToSearch = [];
 
-               function md5_hh(a, b, c, d, x, s, t) {
-                 return md5_cmn(b ^ c ^ d, a, b, x, s, t);
-               }
+             while (node) {
+               for (var i = 0; i < node.children.length; i++) {
+                 var child = node.children[i];
+                 var childBBox = node.leaf ? toBBox(child) : child;
 
-               function md5_ii(a, b, c, d, x, s, t) {
-                 return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+                 if (intersects(bbox, childBBox)) {
+                   if (node.leaf) result.push(child);else if (contains(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
+                 }
                }
-             },
 
-             /**
-              * @member Hashes
-              * @class Hashes.SHA1
-              * @param {Object} [config]
-              * @constructor
-              *
-              * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
-              * Version 2.2 Copyright Paul Johnston 2000 - 2009.
-              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-              * See http://pajhome.org.uk/crypt/md5 for details.
-              */
-             SHA1: function SHA1(options) {
-               /**
-                * Private config properties. You may need to tweak these to be compatible with
-                * the server-side, but the defaults work in most cases.
-                * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
-                */
-               var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
-                   // hexadecimal output case format. false - lowercase; true - uppercase
-               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
-                   // base-64 pad character. Defaults to '=' for strict RFC compliance
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
-               // public methods
+               node = nodesToSearch.pop();
+             }
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s), hexcase);
-               };
+             return result;
+           }
+         }, {
+           key: "collides",
+           value: function collides(bbox) {
+             var node = this.data;
+             if (!intersects(bbox, node)) return false;
+             var nodesToSearch = [];
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+             while (node) {
+               for (var i = 0; i < node.children.length; i++) {
+                 var child = node.children[i];
+                 var childBBox = node.leaf ? this.toBBox(child) : child;
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+                 if (intersects(bbox, childBBox)) {
+                   if (node.leaf || contains(bbox, childBBox)) return true;
+                   nodesToSearch.push(child);
+                 }
+               }
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+               node = nodesToSearch.pop();
+             }
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+             return false;
+           }
+         }, {
+           key: "load",
+           value: function load(data) {
+             if (!(data && data.length)) return this;
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+             if (data.length < this._minEntries) {
+               for (var i = 0; i < data.length; i++) {
+                 this.insert(data[i]);
+               }
 
-               this.any_hmac = function (k, d, e) {
-                 return rstr2any(rstr_hmac(k, d), e);
-               };
-               /**
-                * Perform a simple self-test to see if the VM is working
-                * @return {String} Hexadecimal hash sample
-                * @public
-                */
+               return this;
+             } // recursively build the tree with the given data from scratch using OMT algorithm
 
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * @description Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+             var node = this._build(data.slice(), 0, data.length - 1, 0);
+
+             if (!this.data.children.length) {
+               // save as is if tree is empty
+               this.data = node;
+             } else if (this.data.height === node.height) {
+               // split root if trees have the same height
+               this._splitRoot(this.data, node);
+             } else {
+               if (this.data.height < node.height) {
+                 // swap trees if inserted one is bigger
+                 var tmpNode = this.data;
+                 this.data = node;
+                 node = tmpNode;
+               } // insert the small tree into the large tree at appropriate level
 
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+               this._insert(node, this.data.height - node.height - 1, true);
+             }
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+             return this;
+           }
+         }, {
+           key: "insert",
+           value: function insert(item) {
+             if (item) this._insert(item, this.data.height - 1);
+             return this;
+           }
+         }, {
+           key: "clear",
+           value: function clear() {
+             this.data = createNode([]);
+             return this;
+           }
+         }, {
+           key: "remove",
+           value: function remove(item, equalsFn) {
+             if (!item) return this;
+             var node = this.data;
+             var bbox = this.toBBox(item);
+             var path = [];
+             var indexes = [];
+             var i, parent, goingUp; // depth-first iterative tree traversal
 
+             while (node || path.length) {
+               if (!node) {
+                 // go up
+                 node = path.pop();
+                 parent = path[path.length - 1];
+                 i = indexes.pop();
+                 goingUp = true;
+               }
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+               if (node.leaf) {
+                 // check current node
+                 var index = findItem(item, node.children, equalsFn);
 
+                 if (index !== -1) {
+                   // item found, remove the item and condense tree upwards
+                   node.children.splice(index, 1);
+                   path.push(node);
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+                   this._condense(path);
 
-                 return this;
-               }; // private methods
+                   return this;
+                 }
+               }
 
-               /**
-                * Calculate the SHA-512 of a raw string
-                */
+               if (!goingUp && !node.leaf && contains(node, bbox)) {
+                 // go down
+                 path.push(node);
+                 indexes.push(i);
+                 i = 0;
+                 parent = node;
+                 node = node.children[0];
+               } else if (parent) {
+                 // go right
+                 i++;
+                 node = parent.children[i];
+                 goingUp = false;
+               } else node = null; // nothing found
 
+             }
 
-               function rstr(s) {
-                 s = utf8 ? utf8Encode(s) : s;
-                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
-               }
-               /**
-                * Calculate the HMAC-SHA1 of a key and some data (raw strings)
-                */
+             return this;
+           }
+         }, {
+           key: "toBBox",
+           value: function toBBox(item) {
+             return item;
+           }
+         }, {
+           key: "compareMinX",
+           value: function compareMinX(a, b) {
+             return a.minX - b.minX;
+           }
+         }, {
+           key: "compareMinY",
+           value: function compareMinY(a, b) {
+             return a.minY - b.minY;
+           }
+         }, {
+           key: "toJSON",
+           value: function toJSON() {
+             return this.data;
+           }
+         }, {
+           key: "fromJSON",
+           value: function fromJSON(data) {
+             this.data = data;
+             return this;
+           }
+         }, {
+           key: "_all",
+           value: function _all(node, result) {
+             var nodesToSearch = [];
 
+             while (node) {
+               if (node.leaf) result.push.apply(result, _toConsumableArray(node.children));else nodesToSearch.push.apply(nodesToSearch, _toConsumableArray(node.children));
+               node = nodesToSearch.pop();
+             }
 
-               function rstr_hmac(key, data) {
-                 var bkey, ipad, opad, i, hash;
-                 key = utf8 ? utf8Encode(key) : key;
-                 data = utf8 ? utf8Encode(data) : data;
-                 bkey = rstr2binb(key);
+             return result;
+           }
+         }, {
+           key: "_build",
+           value: function _build(items, left, right, height) {
+             var N = right - left + 1;
+             var M = this._maxEntries;
+             var node;
 
-                 if (bkey.length > 16) {
-                   bkey = binb(bkey, key.length * 8);
-                 }
+             if (N <= M) {
+               // reached leaf level; return leaf
+               node = createNode(items.slice(left, right + 1));
+               calcBBox(node, this.toBBox);
+               return node;
+             }
 
-                 ipad = Array(16), opad = Array(16);
+             if (!height) {
+               // target height of the bulk-loaded tree
+               height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
 
-                 for (i = 0; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+               M = Math.ceil(N / Math.pow(M, height - 1));
+             }
 
-                 hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-                 return binb2rstr(binb(opad.concat(hash), 512 + 160));
-               }
-               /**
-                * Calculate the SHA-1 of an array of big-endian words, and a bit length
-                */
+             node = createNode([]);
+             node.leaf = false;
+             node.height = height; // split the items into M mostly square tiles
 
+             var N2 = Math.ceil(N / M);
+             var N1 = N2 * Math.ceil(Math.sqrt(M));
+             multiSelect(items, left, right, N1, this.compareMinX);
 
-               function binb(x, len) {
-                 var i,
-                     j,
-                     t,
-                     olda,
-                     oldb,
-                     oldc,
-                     oldd,
-                     olde,
-                     w = Array(80),
-                     a = 1732584193,
-                     b = -271733879,
-                     c = -1732584194,
-                     d = 271733878,
-                     e = -1009589776;
-                 /* append padding */
+             for (var i = left; i <= right; i += N1) {
+               var right2 = Math.min(i + N1 - 1, right);
+               multiSelect(items, i, right2, N2, this.compareMinY);
 
-                 x[len >> 5] |= 0x80 << 24 - len % 32;
-                 x[(len + 64 >> 9 << 4) + 15] = len;
+               for (var j = i; j <= right2; j += N2) {
+                 var right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
 
-                 for (i = 0; i < x.length; i += 16) {
-                   olda = a;
-                   oldb = b;
-                   oldc = c;
-                   oldd = d;
-                   olde = e;
+                 node.children.push(this._build(items, j, right3, height - 1));
+               }
+             }
 
-                   for (j = 0; j < 80; j += 1) {
-                     if (j < 16) {
-                       w[j] = x[i + j];
-                     } else {
-                       w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
-                     }
+             calcBBox(node, this.toBBox);
+             return node;
+           }
+         }, {
+           key: "_chooseSubtree",
+           value: function _chooseSubtree(bbox, node, level, path) {
+             while (true) {
+               path.push(node);
+               if (node.leaf || path.length - 1 === level) break;
+               var minArea = Infinity;
+               var minEnlargement = Infinity;
+               var targetNode = void 0;
 
-                     t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));
-                     e = d;
-                     d = c;
-                     c = bit_rol(b, 30);
-                     b = a;
-                     a = t;
-                   }
+               for (var i = 0; i < node.children.length; i++) {
+                 var child = node.children[i];
+                 var area = bboxArea(child);
+                 var enlargement = enlargedArea(bbox, child) - area; // choose entry with the least area enlargement
 
-                   a = safe_add(a, olda);
-                   b = safe_add(b, oldb);
-                   c = safe_add(c, oldc);
-                   d = safe_add(d, oldd);
-                   e = safe_add(e, olde);
+                 if (enlargement < minEnlargement) {
+                   minEnlargement = enlargement;
+                   minArea = area < minArea ? area : minArea;
+                   targetNode = child;
+                 } else if (enlargement === minEnlargement) {
+                   // otherwise choose one with the smallest area
+                   if (area < minArea) {
+                     minArea = area;
+                     targetNode = child;
+                   }
                  }
-
-                 return Array(a, b, c, d, e);
                }
-               /**
-                * Perform the appropriate triplet combination function for the current
-                * iteration
-                */
 
+               node = targetNode || node.children[0];
+             }
 
-               function sha1_ft(t, b, c, d) {
-                 if (t < 20) {
-                   return b & c | ~b & d;
-                 }
+             return node;
+           }
+         }, {
+           key: "_insert",
+           value: function _insert(item, level, isNode) {
+             var bbox = isNode ? item : this.toBBox(item);
+             var insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
 
-                 if (t < 40) {
-                   return b ^ c ^ d;
-                 }
+             var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
 
-                 if (t < 60) {
-                   return b & c | b & d | c & d;
-                 }
 
-                 return b ^ c ^ d;
-               }
-               /**
-                * Determine the appropriate additive constant for the current iteration
-                */
+             node.children.push(item);
+             extend$1(node, bbox); // split on node overflow; propagate upwards if necessary
 
+             while (level >= 0) {
+               if (insertPath[level].children.length > this._maxEntries) {
+                 this._split(insertPath, level);
 
-               function sha1_kt(t) {
-                 return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
-               }
-             },
+                 level--;
+               } else break;
+             } // adjust bboxes along the insertion path
 
-             /**
-              * @class Hashes.SHA256
-              * @param {config}
-              *
-              * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
-              * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
-              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-              * See http://pajhome.org.uk/crypt/md5 for details.
-              * Also http://anmar.eu.org/projects/jssha2/
-              */
-             SHA256: function SHA256(options) {
-               /**
-                * Private properties configuration variables. You may need to tweak these to be compatible with
-                * the server-side, but the defaults work in most cases.
-                * @see this.setUpperCase() method
-                * @see this.setPad() method
-                */
-               var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
-                   // hexadecimal output case format. false - lowercase; true - uppercase  */
-               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+             this._adjustParentBBoxes(bbox, insertPath, level);
+           } // split overflowed node into two
 
-               /* enable/disable utf8 encoding */
-               sha256_K;
-               /* privileged (public) methods */
+         }, {
+           key: "_split",
+           value: function _split(insertPath, level) {
+             var node = insertPath[level];
+             var M = node.children.length;
+             var m = this._minEntries;
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s, utf8));
-               };
+             this._chooseSplitAxis(node, m, M);
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s, utf8), b64pad);
-               };
+             var splitIndex = this._chooseSplitIndex(node, m, M);
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s, utf8), e);
-               };
+             var newNode = createNode(node.children.splice(splitIndex, node.children.length - splitIndex));
+             newNode.height = node.height;
+             newNode.leaf = node.leaf;
+             calcBBox(node, this.toBBox);
+             calcBBox(newNode, this.toBBox);
+             if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
+           }
+         }, {
+           key: "_splitRoot",
+           value: function _splitRoot(node, newNode) {
+             // split root node
+             this.data = createNode([node, newNode]);
+             this.data.height = node.height + 1;
+             this.data.leaf = false;
+             calcBBox(this.data, this.toBBox);
+           }
+         }, {
+           key: "_chooseSplitIndex",
+           value: function _chooseSplitIndex(node, m, M) {
+             var index;
+             var minOverlap = Infinity;
+             var minArea = Infinity;
 
-               this.raw = function (s) {
-                 return rstr(s, utf8);
-               };
+             for (var i = m; i <= M - m; i++) {
+               var bbox1 = distBBox(node, 0, i, this.toBBox);
+               var bbox2 = distBBox(node, i, M, this.toBBox);
+               var overlap = intersectionArea(bbox1, bbox2);
+               var area = bboxArea(bbox1) + bboxArea(bbox2); // choose distribution with minimum overlap
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+               if (overlap < minOverlap) {
+                 minOverlap = overlap;
+                 index = i;
+                 minArea = area < minArea ? area : minArea;
+               } else if (overlap === minOverlap) {
+                 // otherwise choose distribution with minimum area
+                 if (area < minArea) {
+                   minArea = area;
+                   index = i;
+                 }
+               }
+             }
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+             return index || M - m;
+           } // sorts node children by the best axis for split
 
-               this.any_hmac = function (k, d, e) {
-                 return rstr2any(rstr_hmac(k, d), e);
-               };
-               /**
-                * Perform a simple self-test to see if the VM is working
-                * @return {String} Hexadecimal hash sample
-                * @public
-                */
+         }, {
+           key: "_chooseSplitAxis",
+           value: function _chooseSplitAxis(node, m, M) {
+             var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX;
+             var compareMinY = node.leaf ? this.compareMinY : compareNodeMinY;
 
+             var xMargin = this._allDistMargin(node, m, M, compareMinX);
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+             var yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
+             // otherwise it's already sorted by minY
 
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+             if (xMargin < yMargin) node.children.sort(compareMinX);
+           } // total margin of all possible split distributions where each node is at least m full
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+         }, {
+           key: "_allDistMargin",
+           value: function _allDistMargin(node, m, M, compare) {
+             node.children.sort(compare);
+             var toBBox = this.toBBox;
+             var leftBBox = distBBox(node, 0, m, toBBox);
+             var rightBBox = distBBox(node, M - m, M, toBBox);
+             var margin = bboxMargin(leftBBox) + bboxMargin(rightBBox);
 
+             for (var i = m; i < M - m; i++) {
+               var child = node.children[i];
+               extend$1(leftBBox, node.leaf ? toBBox(child) : child);
+               margin += bboxMargin(leftBBox);
+             }
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+             for (var _i = M - m - 1; _i >= m; _i--) {
+               var _child = node.children[_i];
+               extend$1(rightBBox, node.leaf ? toBBox(_child) : _child);
+               margin += bboxMargin(rightBBox);
+             }
 
+             return margin;
+           }
+         }, {
+           key: "_adjustParentBBoxes",
+           value: function _adjustParentBBoxes(bbox, path, level) {
+             // adjust bboxes along the given tree path
+             for (var i = level; i >= 0; i--) {
+               extend$1(path[i], bbox);
+             }
+           }
+         }, {
+           key: "_condense",
+           value: function _condense(path) {
+             // go through the path, removing empty nodes and updating bboxes
+             for (var i = path.length - 1, siblings; i >= 0; i--) {
+               if (path[i].children.length === 0) {
+                 if (i > 0) {
+                   siblings = path[i - 1].children;
+                   siblings.splice(siblings.indexOf(path[i]), 1);
+                 } else this.clear();
+               } else calcBBox(path[i], this.toBBox);
+             }
+           }
+         }]);
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+         return RBush;
+       }();
 
-                 return this;
-               }; // private methods
+       function findItem(item, items, equalsFn) {
+         if (!equalsFn) return items.indexOf(item);
 
-               /**
-                * Calculate the SHA-512 of a raw string
-                */
+         for (var i = 0; i < items.length; i++) {
+           if (equalsFn(item, items[i])) return i;
+         }
 
+         return -1;
+       } // calculate node's bbox from bboxes of its children
 
-               function rstr(s, utf8) {
-                 s = utf8 ? utf8Encode(s) : s;
-                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
-               }
-               /**
-                * Calculate the HMAC-sha256 of a key and some data (raw strings)
-                */
 
+       function calcBBox(node, toBBox) {
+         distBBox(node, 0, node.children.length, toBBox, node);
+       } // min bounding rectangle of node children from k to p-1
 
-               function rstr_hmac(key, data) {
-                 key = utf8 ? utf8Encode(key) : key;
-                 data = utf8 ? utf8Encode(data) : data;
-                 var hash,
-                     i = 0,
-                     bkey = rstr2binb(key),
-                     ipad = Array(16),
-                     opad = Array(16);
 
-                 if (bkey.length > 16) {
-                   bkey = binb(bkey, key.length * 8);
-                 }
+       function distBBox(node, k, p, toBBox, destNode) {
+         if (!destNode) destNode = createNode(null);
+         destNode.minX = Infinity;
+         destNode.minY = Infinity;
+         destNode.maxX = -Infinity;
+         destNode.maxY = -Infinity;
 
-                 for (; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+         for (var i = k; i < p; i++) {
+           var child = node.children[i];
+           extend$1(destNode, node.leaf ? toBBox(child) : child);
+         }
 
-                 hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
-                 return binb2rstr(binb(opad.concat(hash), 512 + 256));
-               }
-               /*
-                * Main sha256 function, with its support functions
-                */
+         return destNode;
+       }
 
+       function extend$1(a, b) {
+         a.minX = Math.min(a.minX, b.minX);
+         a.minY = Math.min(a.minY, b.minY);
+         a.maxX = Math.max(a.maxX, b.maxX);
+         a.maxY = Math.max(a.maxY, b.maxY);
+         return a;
+       }
 
-               function sha256_S(X, n) {
-                 return X >>> n | X << 32 - n;
-               }
+       function compareNodeMinX(a, b) {
+         return a.minX - b.minX;
+       }
 
-               function sha256_R(X, n) {
-                 return X >>> n;
-               }
+       function compareNodeMinY(a, b) {
+         return a.minY - b.minY;
+       }
 
-               function sha256_Ch(x, y, z) {
-                 return x & y ^ ~x & z;
-               }
+       function bboxArea(a) {
+         return (a.maxX - a.minX) * (a.maxY - a.minY);
+       }
 
-               function sha256_Maj(x, y, z) {
-                 return x & y ^ x & z ^ y & z;
-               }
+       function bboxMargin(a) {
+         return a.maxX - a.minX + (a.maxY - a.minY);
+       }
 
-               function sha256_Sigma0256(x) {
-                 return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
-               }
+       function enlargedArea(a, b) {
+         return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
+       }
 
-               function sha256_Sigma1256(x) {
-                 return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
-               }
+       function intersectionArea(a, b) {
+         var minX = Math.max(a.minX, b.minX);
+         var minY = Math.max(a.minY, b.minY);
+         var maxX = Math.min(a.maxX, b.maxX);
+         var maxY = Math.min(a.maxY, b.maxY);
+         return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
+       }
 
-               function sha256_Gamma0256(x) {
-                 return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
-               }
+       function contains(a, b) {
+         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
+       }
 
-               function sha256_Gamma1256(x) {
-                 return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
-               }
+       function intersects(a, b) {
+         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
+       }
 
-               sha256_K = [1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987, 1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522, 264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585, 113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291, 1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344, 430227734, 506948616, 659060556, 883997877, 958139571, 1322822218, 1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998];
+       function createNode(children) {
+         return {
+           children: children,
+           height: 1,
+           leaf: true,
+           minX: Infinity,
+           minY: Infinity,
+           maxX: -Infinity,
+           maxY: -Infinity
+         };
+       } // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
+       // combines selection algorithm with binary divide & conquer approach
 
-               function binb(m, l) {
-                 var HASH = [1779033703, -1150833019, 1013904242, -1521486534, 1359893119, -1694144372, 528734635, 1541459225];
-                 var W = new Array(64);
-                 var a, b, c, d, e, f, g, h;
-                 var i, j, T1, T2;
-                 /* append padding */
 
-                 m[l >> 5] |= 0x80 << 24 - l % 32;
-                 m[(l + 64 >> 9 << 4) + 15] = l;
+       function multiSelect(arr, left, right, n, compare) {
+         var stack = [left, right];
 
-                 for (i = 0; i < m.length; i += 16) {
-                   a = HASH[0];
-                   b = HASH[1];
-                   c = HASH[2];
-                   d = HASH[3];
-                   e = HASH[4];
-                   f = HASH[5];
-                   g = HASH[6];
-                   h = HASH[7];
+         while (stack.length) {
+           right = stack.pop();
+           left = stack.pop();
+           if (right - left <= n) continue;
+           var mid = left + Math.ceil((right - left) / n / 2) * n;
+           quickselect(arr, mid, left, right, compare);
+           stack.push(left, mid, mid, right);
+         }
+       }
 
-                   for (j = 0; j < 64; j += 1) {
-                     if (j < 16) {
-                       W[j] = m[j + i];
-                     } else {
-                       W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]), sha256_Gamma0256(W[j - 15])), W[j - 16]);
-                     }
+       function responseText(response) {
+         if (!response.ok) throw new Error(response.status + " " + response.statusText);
+         return response.text();
+       }
 
-                     T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)), sha256_K[j]), W[j]);
-                     T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
-                     h = g;
-                     g = f;
-                     f = e;
-                     e = safe_add(d, T1);
-                     d = c;
-                     c = b;
-                     b = a;
-                     a = safe_add(T1, T2);
-                   }
+       function d3_text (input, init) {
+         return fetch(input, init).then(responseText);
+       }
+
+       function responseJson(response) {
+         if (!response.ok) throw new Error(response.status + " " + response.statusText);
+         if (response.status === 204 || response.status === 205) return;
+         return response.json();
+       }
 
-                   HASH[0] = safe_add(a, HASH[0]);
-                   HASH[1] = safe_add(b, HASH[1]);
-                   HASH[2] = safe_add(c, HASH[2]);
-                   HASH[3] = safe_add(d, HASH[3]);
-                   HASH[4] = safe_add(e, HASH[4]);
-                   HASH[5] = safe_add(f, HASH[5]);
-                   HASH[6] = safe_add(g, HASH[6]);
-                   HASH[7] = safe_add(h, HASH[7]);
-                 }
+       function d3_json (input, init) {
+         return fetch(input, init).then(responseJson);
+       }
 
-                 return HASH;
-               }
-             },
+       function parser(type) {
+         return function (input, init) {
+           return d3_text(input, init).then(function (text) {
+             return new DOMParser().parseFromString(text, type);
+           });
+         };
+       }
 
-             /**
-              * @class Hashes.SHA512
-              * @param {config}
-              *
-              * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
-              * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
-              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-              * See http://pajhome.org.uk/crypt/md5 for details.
-              */
-             SHA512: function SHA512(options) {
-               /**
-                * Private properties configuration variables. You may need to tweak these to be compatible with
-                * the server-side, but the defaults work in most cases.
-                * @see this.setUpperCase() method
-                * @see this.setPad() method
-                */
-               var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+       var d3_xml = parser("application/xml");
+       var svg = parser("image/svg+xml");
 
-               /* hexadecimal output case format. false - lowercase; true - uppercase  */
-               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+       var tiler$6 = utilTiler();
+       var dispatch$7 = dispatch$8('loaded');
+       var _tileZoom$3 = 14;
+       var _krUrlRoot = 'https://www.keepright.at';
+       var _krData = {
+         errorTypes: {},
+         localizeStrings: {}
+       }; // This gets reassigned if reset
 
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+       var _cache$2;
 
-               /* enable/disable utf8 encoding */
-               sha512_k;
-               /* privileged (public) methods */
+       var _krRuleset = [// no 20 - multiple node on same spot - these are mostly boundaries overlapping roads
+       30, 40, 50, 60, 70, 90, 100, 110, 120, 130, 150, 160, 170, 180, 190, 191, 192, 193, 194, 195, 196, 197, 198, 200, 201, 202, 203, 204, 205, 206, 207, 208, 210, 220, 230, 231, 232, 270, 280, 281, 282, 283, 284, 285, 290, 291, 292, 293, 294, 295, 296, 297, 298, 300, 310, 311, 312, 313, 320, 350, 360, 370, 380, 390, 400, 401, 402, 410, 411, 412, 413];
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s));
-               };
+       function abortRequest$6(controller) {
+         if (controller) {
+           controller.abort();
+         }
+       }
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+       function abortUnwantedRequests$3(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
+           });
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+           if (!wanted) {
+             abortRequest$6(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
+           }
+         });
+       }
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+       function encodeIssueRtree$2(d) {
+         return {
+           minX: d.loc[0],
+           minY: d.loc[1],
+           maxX: d.loc[0],
+           maxY: d.loc[1],
+           data: d
+         };
+       } // Replace or remove QAItem from rtree
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+       function updateRtree$3(item, replace) {
+         _cache$2.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });
 
-               this.any_hmac = function (k, d, e) {
-                 return rstr2any(rstr_hmac(k, d), e);
-               };
-               /**
-                * Perform a simple self-test to see if the VM is working
-                * @return {String} Hexadecimal hash sample
-                * @public
-                */
+         if (replace) {
+           _cache$2.rtree.insert(item);
+         }
+       }
 
+       function tokenReplacements(d) {
+         if (!(d instanceof QAItem)) return;
+         var htmlRegex = new RegExp(/<\/[a-z][\s\S]*>/);
+         var replacements = {};
+         var issueTemplate = _krData.errorTypes[d.whichType];
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * @description Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+         if (!issueTemplate) {
+           /* eslint-disable no-console */
+           console.log('No Template: ', d.whichType);
+           console.log('  ', d.description);
+           /* eslint-enable no-console */
 
+           return;
+         } // some descriptions are just fixed text
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+         if (!issueTemplate.regex) return; // regex pattern should match description with variable details captured
 
+         var errorRegex = new RegExp(issueTemplate.regex, 'i');
+         var errorMatch = errorRegex.exec(d.description);
 
-               this.setPad = function (a) {
-                 b64pad = a || b64pad;
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+         if (!errorMatch) {
+           /* eslint-disable no-console */
+           console.log('Unmatched: ', d.whichType);
+           console.log('  ', d.description);
+           console.log('  ', errorRegex);
+           /* eslint-enable no-console */
 
+           return;
+         }
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+         for (var i = 1; i < errorMatch.length; i++) {
+           // skip first
+           var capture = errorMatch[i];
+           var idType = void 0;
+           idType = 'IDs' in issueTemplate ? issueTemplate.IDs[i - 1] : '';
 
-                 return this;
-               };
-               /* private methods */
+           if (idType && capture) {
+             // link IDs if present in the capture
+             capture = parseError(capture, idType);
+           } else if (htmlRegex.test(capture)) {
+             // escape any html in non-IDs
+             capture = '\\' + capture + '\\';
+           } else {
+             var compare = capture.toLowerCase();
 
-               /**
-                * Calculate the SHA-512 of a raw string
-                */
+             if (_krData.localizeStrings[compare]) {
+               // some replacement strings can be localized
+               capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+             }
+           }
 
+           replacements['var' + i] = capture;
+         }
 
-               function rstr(s) {
-                 s = utf8 ? utf8Encode(s) : s;
-                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
-               }
-               /*
-                * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
-                */
+         return replacements;
+       }
 
+       function parseError(capture, idType) {
+         var compare = capture.toLowerCase();
 
-               function rstr_hmac(key, data) {
-                 key = utf8 ? utf8Encode(key) : key;
-                 data = utf8 ? utf8Encode(data) : data;
-                 var hash,
-                     i = 0,
-                     bkey = rstr2binb(key),
-                     ipad = Array(32),
-                     opad = Array(32);
+         if (_krData.localizeStrings[compare]) {
+           // some replacement strings can be localized
+           capture = _t('QA.keepRight.error_parts.' + _krData.localizeStrings[compare]);
+         }
 
-                 if (bkey.length > 32) {
-                   bkey = binb(bkey, key.length * 8);
-                 }
+         switch (idType) {
+           // link a string like "this node"
+           case 'this':
+             capture = linkErrorObject(capture);
+             break;
 
-                 for (; i < 32; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+           case 'url':
+             capture = linkURL(capture);
+             break;
+           // link an entity ID
 
-                 hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
-                 return binb2rstr(binb(opad.concat(hash), 1024 + 512));
-               }
-               /**
-                * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
-                */
+           case 'n':
+           case 'w':
+           case 'r':
+             capture = linkEntity(idType + capture);
+             break;
+           // some errors have more complex ID lists/variance
 
+           case '20':
+             capture = parse20(capture);
+             break;
 
-               function binb(x, len) {
-                 var j,
-                     i,
-                     l,
-                     W = new Array(80),
-                     hash = new Array(16),
-                     //Initial hash values
-                 H = [new int64(0x6a09e667, -205731576), new int64(-1150833019, -2067093701), new int64(0x3c6ef372, -23791573), new int64(-1521486534, 0x5f1d36f1), new int64(0x510e527f, -1377402159), new int64(-1694144372, 0x2b3e6c1f), new int64(0x1f83d9ab, -79577749), new int64(0x5be0cd19, 0x137e2179)],
-                     T1 = new int64(0, 0),
-                     T2 = new int64(0, 0),
-                     a = new int64(0, 0),
-                     b = new int64(0, 0),
-                     c = new int64(0, 0),
-                     d = new int64(0, 0),
-                     e = new int64(0, 0),
-                     f = new int64(0, 0),
-                     g = new int64(0, 0),
-                     h = new int64(0, 0),
-                     //Temporary variables not specified by the document
-                 s0 = new int64(0, 0),
-                     s1 = new int64(0, 0),
-                     Ch = new int64(0, 0),
-                     Maj = new int64(0, 0),
-                     r1 = new int64(0, 0),
-                     r2 = new int64(0, 0),
-                     r3 = new int64(0, 0);
+           case '211':
+             capture = parse211(capture);
+             break;
 
-                 if (sha512_k === undefined) {
-                   //SHA512 constants
-                   sha512_k = [new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd), new int64(-1245643825, -330482897), new int64(-373957723, -2121671748), new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031), new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736), new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe), new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302), new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1), new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428), new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3), new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65), new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483), new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459), new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210), new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340), new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395), new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70), new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926), new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473), new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8), new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b), new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023), new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30), new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910), new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8), new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53), new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016), new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893), new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397), new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60), new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec), new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047), new int64(-1090935817, -1295615723), new int64(-965641998, -479046869), new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207), new int64(-354779690, -840897762), new int64(-176337025, -294727304), new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026), new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b), new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493), new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620), new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430), new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)];
-                 }
+           case '231':
+             capture = parse231(capture);
+             break;
 
-                 for (i = 0; i < 80; i += 1) {
-                   W[i] = new int64(0, 0);
-                 } // append padding to the source string. The format is described in the FIPS.
+           case '294':
+             capture = parse294(capture);
+             break;
 
+           case '370':
+             capture = parse370(capture);
+             break;
+         }
 
-                 x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
-                 x[(len + 128 >> 10 << 5) + 31] = len;
-                 l = x.length;
+         return capture;
 
-                 for (i = 0; i < l; i += 32) {
-                   //32 dwords is the block size
-                   int64copy(a, H[0]);
-                   int64copy(b, H[1]);
-                   int64copy(c, H[2]);
-                   int64copy(d, H[3]);
-                   int64copy(e, H[4]);
-                   int64copy(f, H[5]);
-                   int64copy(g, H[6]);
-                   int64copy(h, H[7]);
+         function linkErrorObject(d) {
+           return "<a class=\"error_object_link\">".concat(d, "</a>");
+         }
 
-                   for (j = 0; j < 16; j += 1) {
-                     W[j].h = x[i + 2 * j];
-                     W[j].l = x[i + 2 * j + 1];
-                   }
+         function linkEntity(d) {
+           return "<a class=\"error_entity_link\">".concat(d, "</a>");
+         }
 
-                   for (j = 16; j < 80; j += 1) {
-                     //sigma1
-                     int64rrot(r1, W[j - 2], 19);
-                     int64revrrot(r2, W[j - 2], 29);
-                     int64shr(r3, W[j - 2], 6);
-                     s1.l = r1.l ^ r2.l ^ r3.l;
-                     s1.h = r1.h ^ r2.h ^ r3.h; //sigma0
+         function linkURL(d) {
+           return "<a class=\"kr_external_link\" target=\"_blank\" href=\"".concat(d, "\">").concat(d, "</a>");
+         } // arbitrary node list of form: #ID, #ID, #ID...
 
-                     int64rrot(r1, W[j - 15], 1);
-                     int64rrot(r2, W[j - 15], 8);
-                     int64shr(r3, W[j - 15], 7);
-                     s0.l = r1.l ^ r2.l ^ r3.l;
-                     s0.h = r1.h ^ r2.h ^ r3.h;
-                     int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
-                   }
 
-                   for (j = 0; j < 80; j += 1) {
-                     //Ch
-                     Ch.l = e.l & f.l ^ ~e.l & g.l;
-                     Ch.h = e.h & f.h ^ ~e.h & g.h; //Sigma1
+         function parse211(capture) {
+           var newList = [];
+           var items = capture.split(', ');
+           items.forEach(function (item) {
+             // ID has # at the front
+             var id = linkEntity('n' + item.slice(1));
+             newList.push(id);
+           });
+           return newList.join(', ');
+         } // arbitrary way list of form: #ID(layer),#ID(layer),#ID(layer)...
 
-                     int64rrot(r1, e, 14);
-                     int64rrot(r2, e, 18);
-                     int64revrrot(r3, e, 9);
-                     s1.l = r1.l ^ r2.l ^ r3.l;
-                     s1.h = r1.h ^ r2.h ^ r3.h; //Sigma0
 
-                     int64rrot(r1, a, 28);
-                     int64revrrot(r2, a, 2);
-                     int64revrrot(r3, a, 7);
-                     s0.l = r1.l ^ r2.l ^ r3.l;
-                     s0.h = r1.h ^ r2.h ^ r3.h; //Maj
+         function parse231(capture) {
+           var newList = []; // unfortunately 'layer' can itself contain commas, so we split on '),'
 
-                     Maj.l = a.l & b.l ^ a.l & c.l ^ b.l & c.l;
-                     Maj.h = a.h & b.h ^ a.h & c.h ^ b.h & c.h;
-                     int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
-                     int64add(T2, s0, Maj);
-                     int64copy(h, g);
-                     int64copy(g, f);
-                     int64copy(f, e);
-                     int64add(e, d, T1);
-                     int64copy(d, c);
-                     int64copy(c, b);
-                     int64copy(b, a);
-                     int64add(a, T1, T2);
-                   }
+           var items = capture.split('),');
+           items.forEach(function (item) {
+             var match = item.match(/\#(\d+)\((.+)\)?/);
 
-                   int64add(H[0], H[0], a);
-                   int64add(H[1], H[1], b);
-                   int64add(H[2], H[2], c);
-                   int64add(H[3], H[3], d);
-                   int64add(H[4], H[4], e);
-                   int64add(H[5], H[5], f);
-                   int64add(H[6], H[6], g);
-                   int64add(H[7], H[7], h);
-                 } //represent the hash as an array of 32-bit dwords
+             if (match !== null && match.length > 2) {
+               newList.push(linkEntity('w' + match[1]) + ' ' + _t('QA.keepRight.errorTypes.231.layer', {
+                 layer: match[2]
+               }));
+             }
+           });
+           return newList.join(', ');
+         } // arbitrary node/relation list of form: from node #ID,to relation #ID,to node #ID...
 
 
-                 for (i = 0; i < 8; i += 1) {
-                   hash[2 * i] = H[i].h;
-                   hash[2 * i + 1] = H[i].l;
-                 }
+         function parse294(capture) {
+           var newList = [];
+           var items = capture.split(',');
+           items.forEach(function (item) {
+             // item of form "from/to node/relation #ID"
+             item = item.split(' '); // to/from role is more clear in quotes
 
-                 return hash;
-               } //A constructor for 64-bit numbers
+             var role = "\"".concat(item[0], "\""); // first letter of node/relation provides the type
 
+             var idType = item[1].slice(0, 1); // ID has # at the front
 
-               function int64(h, l) {
-                 this.h = h;
-                 this.l = l; //this.toString = int64toString;
-               } //Copies src into dst, assuming both are 64-bit numbers
+             var id = item[2].slice(1);
+             id = linkEntity(idType + id);
+             newList.push("".concat(role, " ").concat(item[1], " ").concat(id));
+           });
+           return newList.join(', ');
+         } // may or may not include the string "(including the name 'name')"
 
 
-               function int64copy(dst, src) {
-                 dst.h = src.h;
-                 dst.l = src.l;
-               } //Right-rotates a 64-bit number by shift
-               //Won't handle cases of shift>=32
-               //The function revrrot() is for that
+         function parse370(capture) {
+           if (!capture) return '';
+           var match = capture.match(/\(including the name (\'.+\')\)/);
 
+           if (match && match.length) {
+             return _t('QA.keepRight.errorTypes.370.including_the_name', {
+               name: match[1]
+             });
+           }
 
-               function int64rrot(dst, x, shift) {
-                 dst.l = x.l >>> shift | x.h << 32 - shift;
-                 dst.h = x.h >>> shift | x.l << 32 - shift;
-               } //Reverses the dwords of the source and then rotates right by shift.
-               //This is equivalent to rotation by 32+shift
+           return '';
+         } // arbitrary node list of form: #ID,#ID,#ID...
 
 
-               function int64revrrot(dst, x, shift) {
-                 dst.l = x.h >>> shift | x.l << 32 - shift;
-                 dst.h = x.l >>> shift | x.h << 32 - shift;
-               } //Bitwise-shifts right a 64-bit number by shift
-               //Won't handle shift>=32, but it's never needed in SHA512
+         function parse20(capture) {
+           var newList = [];
+           var items = capture.split(',');
+           items.forEach(function (item) {
+             // ID has # at the front
+             var id = linkEntity('n' + item.slice(1));
+             newList.push(id);
+           });
+           return newList.join(', ');
+         }
+       }
 
+       var serviceKeepRight = {
+         title: 'keepRight',
+         init: function init() {
+           _mainFileFetcher.get('keepRight').then(function (d) {
+             return _krData = d;
+           });
 
-               function int64shr(dst, x, shift) {
-                 dst.l = x.l >>> shift | x.h << 32 - shift;
-                 dst.h = x.h >>> shift;
-               } //Adds two 64-bit numbers
-               //Like the original implementation, does not rely on 32-bit operations
+           if (!_cache$2) {
+             this.reset();
+           }
 
+           this.event = utilRebind(this, dispatch$7, 'on');
+         },
+         reset: function reset() {
+           if (_cache$2) {
+             Object.values(_cache$2.inflightTile).forEach(abortRequest$6);
+           }
 
-               function int64add(dst, x, y) {
-                 var w0 = (x.l & 0xffff) + (y.l & 0xffff);
-                 var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
-                 var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
-                 var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
-                 dst.l = w0 & 0xffff | w1 << 16;
-                 dst.h = w2 & 0xffff | w3 << 16;
-               } //Same, except with 4 addends. Works faster than adding them one by one.
+           _cache$2 = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush()
+           };
+         },
+         // KeepRight API:  http://osm.mueschelsoft.de/keepright/interfacing.php
+         loadIssues: function loadIssues(projection) {
+           var _this = this;
 
+           var options = {
+             format: 'geojson',
+             ch: _krRuleset
+           }; // determine the needed tiles to cover the view
 
-               function int64add4(dst, a, b, c, d) {
-                 var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
-                 var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
-                 var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
-                 var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
-                 dst.l = w0 & 0xffff | w1 << 16;
-                 dst.h = w2 & 0xffff | w3 << 16;
-               } //Same, except with 5 addends
+           var tiles = tiler$6.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
+
+           abortUnwantedRequests$3(_cache$2, tiles); // issue new requests..
 
+           tiles.forEach(function (tile) {
+             if (_cache$2.loadedTile[tile.id] || _cache$2.inflightTile[tile.id]) return;
 
-               function int64add5(dst, a, b, c, d, e) {
-                 var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
-                     w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
-                     w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
-                     w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
-                 dst.l = w0 & 0xffff | w1 << 16;
-                 dst.h = w2 & 0xffff | w3 << 16;
-               }
-             },
+             var _tile$extent$rectangl = tile.extent.rectangle(),
+                 _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+                 left = _tile$extent$rectangl2[0],
+                 top = _tile$extent$rectangl2[1],
+                 right = _tile$extent$rectangl2[2],
+                 bottom = _tile$extent$rectangl2[3];
 
-             /**
-              * @class Hashes.RMD160
-              * @constructor
-              * @param {Object} [config]
-              *
-              * A JavaScript implementation of the RIPEMD-160 Algorithm
-              * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
-              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
-              * See http://pajhome.org.uk/crypt/md5 for details.
-              * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
-              */
-             RMD160: function RMD160(options) {
-               /**
-                * Private properties configuration variables. You may need to tweak these to be compatible with
-                * the server-side, but the defaults work in most cases.
-                * @see this.setUpperCase() method
-                * @see this.setPad() method
-                */
-               var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+             var params = Object.assign({}, options, {
+               left: left,
+               bottom: bottom,
+               right: right,
+               top: top
+             });
+             var url = "".concat(_krUrlRoot, "/export.php?") + utilQsString(params);
+             var controller = new AbortController();
+             _cache$2.inflightTile[tile.id] = controller;
+             d3_json(url, {
+               signal: controller.signal
+             }).then(function (data) {
+               delete _cache$2.inflightTile[tile.id];
+               _cache$2.loadedTile[tile.id] = true;
 
-               /* hexadecimal output case format. false - lowercase; true - uppercase  */
-               b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
+               if (!data || !data.features || !data.features.length) {
+                 throw new Error('No Data');
+               }
 
-               /* base-64 pad character. Default '=' for strict RFC compliance   */
-               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
+               data.features.forEach(function (feature) {
+                 var _feature$properties = feature.properties,
+                     itemType = _feature$properties.error_type,
+                     id = _feature$properties.error_id,
+                     _feature$properties$c = _feature$properties.comment,
+                     comment = _feature$properties$c === void 0 ? null : _feature$properties$c,
+                     objectId = _feature$properties.object_id,
+                     objectType = _feature$properties.object_type,
+                     schema = _feature$properties.schema,
+                     title = _feature$properties.title;
+                 var loc = feature.geometry.coordinates,
+                     _feature$properties$d = feature.properties.description,
+                     description = _feature$properties$d === void 0 ? '' : _feature$properties$d; // if there is a parent, save its error type e.g.:
+                 //  Error 191 = "highway-highway"
+                 //  Error 190 = "intersections without junctions"  (parent)
 
-               /* enable/disable utf8 encoding */
-               rmd160_r1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13],
-                   rmd160_r2 = [5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11],
-                   rmd160_s1 = [11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6],
-                   rmd160_s2 = [8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11];
-               /* privileged (public) methods */
+                 var issueTemplate = _krData.errorTypes[itemType];
+                 var parentIssueType = (Math.floor(itemType / 10) * 10).toString(); // try to handle error type directly, fallback to parent error type.
 
-               this.hex = function (s) {
-                 return rstr2hex(rstr(s));
-               };
+                 var whichType = issueTemplate ? itemType : parentIssueType;
+                 var whichTemplate = _krData.errorTypes[whichType]; // Rewrite a few of the errors at this point..
+                 // This is done to make them easier to linkify and translate.
 
-               this.b64 = function (s) {
-                 return rstr2b64(rstr(s), b64pad);
-               };
+                 switch (whichType) {
+                   case '170':
+                     description = "This feature has a FIXME tag: ".concat(description);
+                     break;
 
-               this.any = function (s, e) {
-                 return rstr2any(rstr(s), e);
-               };
+                   case '292':
+                   case '293':
+                     description = description.replace('A turn-', 'This turn-');
+                     break;
 
-               this.raw = function (s) {
-                 return rstr(s);
-               };
+                   case '294':
+                   case '295':
+                   case '296':
+                   case '297':
+                   case '298':
+                     description = "This turn-restriction~".concat(description);
+                     break;
 
-               this.hex_hmac = function (k, d) {
-                 return rstr2hex(rstr_hmac(k, d));
-               };
+                   case '300':
+                     description = 'This highway is missing a maxspeed tag';
+                     break;
 
-               this.b64_hmac = function (k, d) {
-                 return rstr2b64(rstr_hmac(k, d), b64pad);
-               };
+                   case '411':
+                   case '412':
+                   case '413':
+                     description = "This feature~".concat(description);
+                     break;
+                 } // move markers slightly so it doesn't obscure the geometry,
+                 // then move markers away from other coincident markers
 
-               this.any_hmac = function (k, d, e) {
-                 return rstr2any(rstr_hmac(k, d), e);
-               };
-               /**
-                * Perform a simple self-test to see if the VM is working
-                * @return {String} Hexadecimal hash sample
-                * @public
-                */
 
+                 var coincident = false;
 
-               this.vm_test = function () {
-                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
-               };
-               /**
-                * @description Enable/disable uppercase hexadecimal returned string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+                 do {
+                   // first time, move marker up. after that, move marker right.
+                   var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+                   loc = geoVecAdd(loc, delta);
+                   var bbox = geoExtent(loc).bbox();
+                   coincident = _cache$2.rtree.search(bbox).length;
+                 } while (coincident);
 
+                 var d = new QAItem(loc, _this, itemType, id, {
+                   comment: comment,
+                   description: description,
+                   whichType: whichType,
+                   parentIssueType: parentIssueType,
+                   severity: whichTemplate.severity || 'error',
+                   objectId: objectId,
+                   objectType: objectType,
+                   schema: schema,
+                   title: title
+                 });
+                 d.replacements = tokenReplacements(d);
+                 _cache$2.data[id] = d;
 
-               this.setUpperCase = function (a) {
-                 if (typeof a === 'boolean') {
-                   hexcase = a;
-                 }
+                 _cache$2.rtree.insert(encodeIssueRtree$2(d));
+               });
+               dispatch$7.call('loaded');
+             })["catch"](function () {
+               delete _cache$2.inflightTile[tile.id];
+               _cache$2.loadedTile[tile.id] = true;
+             });
+           });
+         },
+         postUpdate: function postUpdate(d, callback) {
+           var _this2 = this;
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {string} Pad
-                * @return {Object} this
-                * @public
-                */
+           if (_cache$2.inflightPost[d.id]) {
+             return callback({
+               message: 'Error update already inflight',
+               status: -2
+             }, d);
+           }
 
+           var params = {
+             schema: d.schema,
+             id: d.id
+           };
 
-               this.setPad = function (a) {
-                 if (typeof a !== 'undefined') {
-                   b64pad = a;
-                 }
+           if (d.newStatus) {
+             params.st = d.newStatus;
+           }
 
-                 return this;
-               };
-               /**
-                * @description Defines a base64 pad string
-                * @param {boolean}
-                * @return {Object} this
-                * @public
-                */
+           if (d.newComment !== undefined) {
+             params.co = d.newComment;
+           } // NOTE: This throws a CORS err, but it seems successful.
+           // We don't care too much about the response, so this is fine.
 
 
-               this.setUTF8 = function (a) {
-                 if (typeof a === 'boolean') {
-                   utf8 = a;
-                 }
+           var url = "".concat(_krUrlRoot, "/comment.php?") + utilQsString(params);
+           var controller = new AbortController();
+           _cache$2.inflightPost[d.id] = controller; // Since this is expected to throw an error just continue as if it worked
+           // (worst case scenario the request truly fails and issue will show up if iD restarts)
 
-                 return this;
-               };
-               /* private methods */
+           d3_json(url, {
+             signal: controller.signal
+           })["finally"](function () {
+             delete _cache$2.inflightPost[d.id];
 
-               /**
-                * Calculate the rmd160 of a raw string
-                */
+             if (d.newStatus === 'ignore') {
+               // ignore permanently (false positive)
+               _this2.removeItem(d);
+             } else if (d.newStatus === 'ignore_t') {
+               // ignore temporarily (error fixed)
+               _this2.removeItem(d);
 
+               _cache$2.closed["".concat(d.schema, ":").concat(d.id)] = true;
+             } else {
+               d = _this2.replaceItem(d.update({
+                 comment: d.newComment,
+                 newComment: undefined,
+                 newState: undefined
+               }));
+             }
 
-               function rstr(s) {
-                 s = utf8 ? utf8Encode(s) : s;
-                 return binl2rstr(binl(rstr2binl(s), s.length * 8));
-               }
-               /**
-                * Calculate the HMAC-rmd160 of a key and some data (raw strings)
-                */
+             if (callback) callback(null, d);
+           });
+         },
+         // Get all cached QAItems covering the viewport
+         getItems: function getItems(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return _cache$2.rtree.search(bbox).map(function (d) {
+             return d.data;
+           });
+         },
+         // Get a QAItem from cache
+         // NOTE: Don't change method name until UI v3 is merged
+         getError: function getError(id) {
+           return _cache$2.data[id];
+         },
+         // Replace a single QAItem in the cache
+         replaceItem: function replaceItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           _cache$2.data[item.id] = item;
+           updateRtree$3(encodeIssueRtree$2(item), true); // true = replace
 
+           return item;
+         },
+         // Remove a single QAItem from the cache
+         removeItem: function removeItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           delete _cache$2.data[item.id];
+           updateRtree$3(encodeIssueRtree$2(item), false); // false = remove
+         },
+         issueURL: function issueURL(item) {
+           return "".concat(_krUrlRoot, "/report_map.php?schema=").concat(item.schema, "&error=").concat(item.id);
+         },
+         // Get an array of issues closed during this session.
+         // Used to populate `closed:keepright` changeset tag
+         getClosedIDs: function getClosedIDs() {
+           return Object.keys(_cache$2.closed).sort();
+         }
+       };
 
-               function rstr_hmac(key, data) {
-                 key = utf8 ? utf8Encode(key) : key;
-                 data = utf8 ? utf8Encode(data) : data;
-                 var i,
-                     hash,
-                     bkey = rstr2binl(key),
-                     ipad = Array(16),
-                     opad = Array(16);
+       var tiler$5 = utilTiler();
+       var dispatch$6 = dispatch$8('loaded');
+       var _tileZoom$2 = 14;
+       var _impOsmUrls = {
+         ow: 'https://grab.community.improve-osm.org/directionOfFlowService',
+         mr: 'https://grab.community.improve-osm.org/missingGeoService',
+         tr: 'https://grab.community.improve-osm.org/turnRestrictionService'
+       };
+       var _impOsmData = {
+         icons: {}
+       }; // This gets reassigned if reset
 
-                 if (bkey.length > 16) {
-                   bkey = binl(bkey, key.length * 8);
-                 }
+       var _cache$1;
 
-                 for (i = 0; i < 16; i += 1) {
-                   ipad[i] = bkey[i] ^ 0x36363636;
-                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
-                 }
+       function abortRequest$5(i) {
+         Object.values(i).forEach(function (controller) {
+           if (controller) {
+             controller.abort();
+           }
+         });
+       }
 
-                 hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
-                 return binl2rstr(binl(opad.concat(hash), 512 + 160));
-               }
-               /**
-                * Convert an array of little-endian words to a string
-                */
+       function abortUnwantedRequests$2(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
+           });
 
+           if (!wanted) {
+             abortRequest$5(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
+           }
+         });
+       }
 
-               function binl2rstr(input) {
-                 var i,
-                     output = '',
-                     l = input.length * 32;
+       function encodeIssueRtree$1(d) {
+         return {
+           minX: d.loc[0],
+           minY: d.loc[1],
+           maxX: d.loc[0],
+           maxY: d.loc[1],
+           data: d
+         };
+       } // Replace or remove QAItem from rtree
 
-                 for (i = 0; i < l; i += 8) {
-                   output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
-                 }
 
-                 return output;
-               }
-               /**
-                * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
-                */
+       function updateRtree$2(item, replace) {
+         _cache$1.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });
 
+         if (replace) {
+           _cache$1.rtree.insert(item);
+         }
+       }
 
-               function binl(x, len) {
-                 var T,
-                     j,
-                     i,
-                     l,
-                     h0 = 0x67452301,
-                     h1 = 0xefcdab89,
-                     h2 = 0x98badcfe,
-                     h3 = 0x10325476,
-                     h4 = 0xc3d2e1f0,
-                     A1,
-                     B1,
-                     C1,
-                     D1,
-                     E1,
-                     A2,
-                     B2,
-                     C2,
-                     D2,
-                     E2;
-                 /* append padding */
+       function linkErrorObject(d) {
+         return "<a class=\"error_object_link\">".concat(d, "</a>");
+       }
 
-                 x[len >> 5] |= 0x80 << len % 32;
-                 x[(len + 64 >>> 9 << 4) + 14] = len;
-                 l = x.length;
+       function linkEntity(d) {
+         return "<a class=\"error_entity_link\">".concat(d, "</a>");
+       }
 
-                 for (i = 0; i < l; i += 16) {
-                   A1 = A2 = h0;
-                   B1 = B2 = h1;
-                   C1 = C2 = h2;
-                   D1 = D2 = h3;
-                   E1 = E2 = h4;
+       function pointAverage(points) {
+         if (points.length) {
+           var sum = points.reduce(function (acc, point) {
+             return geoVecAdd(acc, [point.lon, point.lat]);
+           }, [0, 0]);
+           return geoVecScale(sum, 1 / points.length);
+         } else {
+           return [0, 0];
+         }
+       }
 
-                   for (j = 0; j <= 79; j += 1) {
-                     T = safe_add(A1, rmd160_f(j, B1, C1, D1));
-                     T = safe_add(T, x[i + rmd160_r1[j]]);
-                     T = safe_add(T, rmd160_K1(j));
-                     T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
-                     A1 = E1;
-                     E1 = D1;
-                     D1 = bit_rol(C1, 10);
-                     C1 = B1;
-                     B1 = T;
-                     T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
-                     T = safe_add(T, x[i + rmd160_r2[j]]);
-                     T = safe_add(T, rmd160_K2(j));
-                     T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
-                     A2 = E2;
-                     E2 = D2;
-                     D2 = bit_rol(C2, 10);
-                     C2 = B2;
-                     B2 = T;
-                   }
+       function relativeBearing(p1, p2) {
+         var angle = Math.atan2(p2.lon - p1.lon, p2.lat - p1.lat);
 
-                   T = safe_add(h1, safe_add(C1, D2));
-                   h1 = safe_add(h2, safe_add(D1, E2));
-                   h2 = safe_add(h3, safe_add(E1, A2));
-                   h3 = safe_add(h4, safe_add(A1, B2));
-                   h4 = safe_add(h0, safe_add(B1, C2));
-                   h0 = T;
-                 }
+         if (angle < 0) {
+           angle += 2 * Math.PI;
+         } // Return degrees
 
-                 return [h0, h1, h2, h3, h4];
-               } // specific algorithm methods
 
+         return angle * 180 / Math.PI;
+       } // Assuming range [0,360)
 
-               function rmd160_f(j, x, y, z) {
-                 return 0 <= j && j <= 15 ? x ^ y ^ z : 16 <= j && j <= 31 ? x & y | ~x & z : 32 <= j && j <= 47 ? (x | ~y) ^ z : 48 <= j && j <= 63 ? x & z | y & ~z : 64 <= j && j <= 79 ? x ^ (y | ~z) : 'rmd160_f: j out of range';
-               }
 
-               function rmd160_K1(j) {
-                 return 0 <= j && j <= 15 ? 0x00000000 : 16 <= j && j <= 31 ? 0x5a827999 : 32 <= j && j <= 47 ? 0x6ed9eba1 : 48 <= j && j <= 63 ? 0x8f1bbcdc : 64 <= j && j <= 79 ? 0xa953fd4e : 'rmd160_K1: j out of range';
-               }
+       function cardinalDirection(bearing) {
+         var dir = 45 * Math.round(bearing / 45);
+         var compass = {
+           0: 'north',
+           45: 'northeast',
+           90: 'east',
+           135: 'southeast',
+           180: 'south',
+           225: 'southwest',
+           270: 'west',
+           315: 'northwest',
+           360: 'north'
+         };
+         return _t("QA.improveOSM.directions.".concat(compass[dir]));
+       } // Errors shouldn't obscure each other
 
-               function rmd160_K2(j) {
-                 return 0 <= j && j <= 15 ? 0x50a28be6 : 16 <= j && j <= 31 ? 0x5c4dd124 : 32 <= j && j <= 47 ? 0x6d703ef3 : 48 <= j && j <= 63 ? 0x7a6d76e9 : 64 <= j && j <= 79 ? 0x00000000 : 'rmd160_K2: j out of range';
-               }
-             }
-           }; // exposes Hashes
 
-           (function (window, undefined$1) {
-             var freeExports = false;
+       function preventCoincident$1(loc, bumpUp) {
+         var coincident = false;
 
-             {
-               freeExports = exports;
+         do {
+           // first time, move marker up. after that, move marker right.
+           var delta = coincident ? [0.00001, 0] : bumpUp ? [0, 0.00001] : [0, 0];
+           loc = geoVecAdd(loc, delta);
+           var bbox = geoExtent(loc).bbox();
+           coincident = _cache$1.rtree.search(bbox).length;
+         } while (coincident);
 
-               if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
-                 window = commonjsGlobal;
-               }
-             }
+         return loc;
+       }
 
-             if (typeof undefined$1 === 'function' && _typeof(undefined$1.amd) === 'object' && undefined$1.amd) {
-               // define as an anonymous module, so, through path mapping, it can be aliased
-               undefined$1(function () {
-                 return Hashes;
-               });
-             } else if (freeExports) {
-               // in Node.js or RingoJS v0.8.0+
-               if ( module && module.exports === freeExports) {
-                 module.exports = Hashes;
-               } // in Narwhal or RingoJS v0.7.0-
-               else {
-                   freeExports.Hashes = Hashes;
-                 }
-             } else {
-               // in a browser or Rhino
-               window.Hashes = Hashes;
-             }
-           })(this);
-         })(); // IIFE
+       var serviceImproveOSM = {
+         title: 'improveOSM',
+         init: function init() {
+           _mainFileFetcher.get('qa_data').then(function (d) {
+             return _impOsmData = d.improveOSM;
+           });
+
+           if (!_cache$1) {
+             this.reset();
+           }
 
-       });
+           this.event = utilRebind(this, dispatch$6, 'on');
+         },
+         reset: function reset() {
+           if (_cache$1) {
+             Object.values(_cache$1.inflightTile).forEach(abortRequest$5);
+           }
 
-       var immutable = extend$2;
-       var hasOwnProperty$2 = Object.prototype.hasOwnProperty;
+           _cache$1 = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush()
+           };
+         },
+         loadIssues: function loadIssues(projection) {
+           var _this = this;
 
-       function extend$2() {
-         var target = {};
+           var options = {
+             client: 'iD',
+             status: 'OPEN',
+             zoom: '19' // Use a high zoom so that clusters aren't returned
 
-         for (var i = 0; i < arguments.length; i++) {
-           var source = arguments[i];
+           }; // determine the needed tiles to cover the view
 
-           for (var key in source) {
-             if (hasOwnProperty$2.call(source, key)) {
-               target[key] = source[key];
-             }
-           }
-         }
+           var tiles = tiler$5.zoomExtent([_tileZoom$2, _tileZoom$2]).getTiles(projection); // abort inflight requests that are no longer needed
 
-         return target;
-       }
+           abortUnwantedRequests$2(_cache$1, tiles); // issue new requests..
 
-       var sha1 = new hashes.SHA1();
-       var ohauth = {};
+           tiles.forEach(function (tile) {
+             if (_cache$1.loadedTile[tile.id] || _cache$1.inflightTile[tile.id]) return;
 
-       ohauth.qsString = function (obj) {
-         return Object.keys(obj).sort().map(function (key) {
-           return ohauth.percentEncode(key) + '=' + ohauth.percentEncode(obj[key]);
-         }).join('&');
-       };
+             var _tile$extent$rectangl = tile.extent.rectangle(),
+                 _tile$extent$rectangl2 = _slicedToArray(_tile$extent$rectangl, 4),
+                 east = _tile$extent$rectangl2[0],
+                 north = _tile$extent$rectangl2[1],
+                 west = _tile$extent$rectangl2[2],
+                 south = _tile$extent$rectangl2[3];
 
-       ohauth.stringQs = function (str) {
-         return str.split('&').filter(function (pair) {
-           return pair !== '';
-         }).reduce(function (obj, pair) {
-           var parts = pair.split('=');
-           obj[decodeURIComponent(parts[0])] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
-           return obj;
-         }, {});
-       };
+             var params = Object.assign({}, options, {
+               east: east,
+               south: south,
+               west: west,
+               north: north
+             }); // 3 separate requests to store for each tile
 
-       ohauth.rawxhr = function (method, url, data, headers, callback) {
-         var xhr = new XMLHttpRequest(),
-             twoHundred = /^20\d$/;
+             var requests = {};
+             Object.keys(_impOsmUrls).forEach(function (k) {
+               // We exclude WATER from missing geometry as it doesn't seem useful
+               // We use most confident one-way and turn restrictions only, still have false positives
+               var kParams = Object.assign({}, params, k === 'mr' ? {
+                 type: 'PARKING,ROAD,BOTH,PATH'
+               } : {
+                 confidenceLevel: 'C1'
+               });
+               var url = "".concat(_impOsmUrls[k], "/search?") + utilQsString(kParams);
+               var controller = new AbortController();
+               requests[k] = controller;
+               d3_json(url, {
+                 signal: controller.signal
+               }).then(function (data) {
+                 delete _cache$1.inflightTile[tile.id][k];
 
-         xhr.onreadystatechange = function () {
-           if (4 === xhr.readyState && 0 !== xhr.status) {
-             if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
-           }
-         };
+                 if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+                   delete _cache$1.inflightTile[tile.id];
+                   _cache$1.loadedTile[tile.id] = true;
+                 } // Road segments at high zoom == oneways
 
-         xhr.onerror = function (e) {
-           return callback(e, null);
-         };
 
-         xhr.open(method, url, true);
+                 if (data.roadSegments) {
+                   data.roadSegments.forEach(function (feature) {
+                     // Position error at the approximate middle of the segment
+                     var points = feature.points,
+                         wayId = feature.wayId,
+                         fromNodeId = feature.fromNodeId,
+                         toNodeId = feature.toNodeId;
+                     var itemId = "".concat(wayId).concat(fromNodeId).concat(toNodeId);
+                     var mid = points.length / 2;
+                     var loc; // Even number of points, find midpoint of the middle two
+                     // Odd number of points, use position of very middle point
 
-         for (var h in headers) {
-           xhr.setRequestHeader(h, headers[h]);
-         }
+                     if (mid % 1 === 0) {
+                       loc = pointAverage([points[mid - 1], points[mid]]);
+                     } else {
+                       mid = points[Math.floor(mid)];
+                       loc = [mid.lon, mid.lat];
+                     } // One-ways can land on same segment in opposite direction
 
-         xhr.send(data);
-         return xhr;
-       };
 
-       ohauth.xhr = function (method, url, auth, data, options, callback) {
-         var headers = options && options.header || {
-           'Content-Type': 'application/x-www-form-urlencoded'
-         };
-         headers.Authorization = 'OAuth ' + ohauth.authHeader(auth);
-         return ohauth.rawxhr(method, url, data, headers, callback);
-       };
+                     loc = preventCoincident$1(loc, false);
+                     var d = new QAItem(loc, _this, k, itemId, {
+                       issueKey: k,
+                       // used as a category
+                       identifier: {
+                         // used to post changes
+                         wayId: wayId,
+                         fromNodeId: fromNodeId,
+                         toNodeId: toNodeId
+                       },
+                       objectId: wayId,
+                       objectType: 'way'
+                     }); // Variables used in the description
 
-       ohauth.nonce = function () {
-         for (var o = ''; o.length < 6;) {
-           o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
-         }
+                     d.replacements = {
+                       percentage: feature.percentOfTrips,
+                       num_trips: feature.numberOfTrips,
+                       highway: linkErrorObject(_t('QA.keepRight.error_parts.highway')),
+                       from_node: linkEntity('n' + feature.fromNodeId),
+                       to_node: linkEntity('n' + feature.toNodeId)
+                     };
+                     _cache$1.data[d.id] = d;
 
-         return o;
-       };
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+                   });
+                 } // Tiles at high zoom == missing roads
 
-       ohauth.authHeader = function (obj) {
-         return Object.keys(obj).sort().map(function (key) {
-           return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
-         }).join(', ');
-       };
 
-       ohauth.timestamp = function () {
-         return ~~(+new Date() / 1000);
-       };
+                 if (data.tiles) {
+                   data.tiles.forEach(function (feature) {
+                     var type = feature.type,
+                         x = feature.x,
+                         y = feature.y,
+                         numberOfTrips = feature.numberOfTrips;
+                     var geoType = type.toLowerCase();
+                     var itemId = "".concat(geoType).concat(x).concat(y).concat(numberOfTrips); // Average of recorded points should land on the missing geometry
+                     // Missing geometry could happen to land on another error
 
-       ohauth.percentEncode = function (s) {
-         return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
-       };
+                     var loc = pointAverage(feature.points);
+                     loc = preventCoincident$1(loc, false);
+                     var d = new QAItem(loc, _this, "".concat(k, "-").concat(geoType), itemId, {
+                       issueKey: k,
+                       identifier: {
+                         x: x,
+                         y: y
+                       }
+                     });
+                     d.replacements = {
+                       num_trips: numberOfTrips,
+                       geometry_type: _t("QA.improveOSM.geometry_types.".concat(geoType))
+                     }; // -1 trips indicates data came from a 3rd party
 
-       ohauth.baseString = function (method, url, params) {
-         if (params.oauth_signature) delete params.oauth_signature;
-         return [method, ohauth.percentEncode(url), ohauth.percentEncode(ohauth.qsString(params))].join('&');
-       };
+                     if (numberOfTrips === -1) {
+                       d.desc = _t('QA.improveOSM.error_types.mr.description_alt', d.replacements);
+                     }
 
-       ohauth.signature = function (oauth_secret, token_secret, baseString) {
-         return sha1.b64_hmac(ohauth.percentEncode(oauth_secret) + '&' + ohauth.percentEncode(token_secret), baseString);
-       };
-       /**
-        * Takes an options object for configuration (consumer_key,
-        * consumer_secret, version, signature_method, token, token_secret)
-        * and returns a function that generates the Authorization header
-        * for given data.
-        *
-        * The returned function takes these parameters:
-        * - method: GET/POST/...
-        * - uri: full URI with protocol, port, path and query string
-        * - extra_params: any extra parameters (that are passed in the POST data),
-        *   can be an object or a from-urlencoded string.
-        *
-        * Returned function returns full OAuth header with "OAuth" string in it.
-        */
+                     _cache$1.data[d.id] = d;
 
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
+                   });
+                 } // Entities at high zoom == turn restrictions
 
-       ohauth.headerGenerator = function (options) {
-         options = options || {};
-         var consumer_key = options.consumer_key || '',
-             consumer_secret = options.consumer_secret || '',
-             signature_method = options.signature_method || 'HMAC-SHA1',
-             version = options.version || '1.0',
-             token = options.token || '',
-             token_secret = options.token_secret || '';
-         return function (method, uri, extra_params) {
-           method = method.toUpperCase();
 
-           if (typeof extra_params === 'string' && extra_params.length > 0) {
-             extra_params = ohauth.stringQs(extra_params);
-           }
+                 if (data.entities) {
+                   data.entities.forEach(function (feature) {
+                     var point = feature.point,
+                         id = feature.id,
+                         segments = feature.segments,
+                         numberOfPasses = feature.numberOfPasses,
+                         turnType = feature.turnType;
+                     var itemId = "".concat(id.replace(/[,:+#]/g, '_')); // Turn restrictions could be missing at same junction
+                     // We also want to bump the error up so node is accessible
 
-           var uri_parts = uri.split('?', 2),
-               base_uri = uri_parts[0];
-           var query_params = uri_parts.length === 2 ? ohauth.stringQs(uri_parts[1]) : {};
-           var oauth_params = {
-             oauth_consumer_key: consumer_key,
-             oauth_signature_method: signature_method,
-             oauth_version: version,
-             oauth_timestamp: ohauth.timestamp(),
-             oauth_nonce: ohauth.nonce()
-           };
-           if (token) oauth_params.oauth_token = token;
-           var all_params = immutable({}, oauth_params, query_params, extra_params),
-               base_str = ohauth.baseString(method, base_uri, all_params);
-           oauth_params.oauth_signature = ohauth.signature(consumer_secret, token_secret, base_str);
-           return 'OAuth ' + ohauth.authHeader(oauth_params);
-         };
-       };
+                     var loc = preventCoincident$1([point.lon, point.lat], true); // Elements are presented in a strange way
 
-       var ohauth_1 = ohauth;
+                     var ids = id.split(',');
+                     var from_way = ids[0];
+                     var via_node = ids[3];
+                     var to_way = ids[2].split(':')[1];
+                     var d = new QAItem(loc, _this, k, itemId, {
+                       issueKey: k,
+                       identifier: id,
+                       objectId: via_node,
+                       objectType: 'node'
+                     }); // Travel direction along from_way clarifies the turn restriction
 
-       var resolveUrl$1 = createCommonjsModule(function (module, exports) {
-         // Copyright 2014 Simon Lydell
-         // X11 (“MIT”) Licensed. (See LICENSE.)
-         void function (root, factory) {
-           {
-             module.exports = factory();
-           }
-         }(commonjsGlobal, function () {
-           function resolveUrl()
-           /* ...urls */
-           {
-             var numUrls = arguments.length;
+                     var _segments$0$points = _slicedToArray(segments[0].points, 2),
+                         p1 = _segments$0$points[0],
+                         p2 = _segments$0$points[1];
 
-             if (numUrls === 0) {
-               throw new Error("resolveUrl requires at least one argument; got none.");
-             }
+                     var dir_of_travel = cardinalDirection(relativeBearing(p1, p2)); // Variables used in the description
 
-             var base = document.createElement("base");
-             base.href = arguments[0];
+                     d.replacements = {
+                       num_passed: numberOfPasses,
+                       num_trips: segments[0].numberOfTrips,
+                       turn_restriction: turnType.toLowerCase(),
+                       from_way: linkEntity('w' + from_way),
+                       to_way: linkEntity('w' + to_way),
+                       travel_direction: dir_of_travel,
+                       junction: linkErrorObject(_t('QA.keepRight.error_parts.this_node'))
+                     };
+                     _cache$1.data[d.id] = d;
 
-             if (numUrls === 1) {
-               return base.href;
-             }
+                     _cache$1.rtree.insert(encodeIssueRtree$1(d));
 
-             var head = document.getElementsByTagName("head")[0];
-             head.insertBefore(base, head.firstChild);
-             var a = document.createElement("a");
-             var resolved;
+                     dispatch$6.call('loaded');
+                   });
+                 }
+               })["catch"](function () {
+                 delete _cache$1.inflightTile[tile.id][k];
 
-             for (var index = 1; index < numUrls; index++) {
-               a.href = arguments[index];
-               resolved = a.href;
-               base.href = resolved;
-             }
+                 if (!Object.keys(_cache$1.inflightTile[tile.id]).length) {
+                   delete _cache$1.inflightTile[tile.id];
+                   _cache$1.loadedTile[tile.id] = true;
+                 }
+               });
+             });
+             _cache$1.inflightTile[tile.id] = requests;
+           });
+         },
+         getComments: function getComments(item) {
+           var _this2 = this;
 
-             head.removeChild(base);
-             return resolved;
+           // If comments already retrieved no need to do so again
+           if (item.comments) {
+             return Promise.resolve(item);
            }
 
-           return resolveUrl;
-         });
-       });
+           var key = item.issueKey;
+           var qParams = {};
 
-       var assign = make_assign();
-       var create$1 = make_create();
-       var trim$3 = make_trim();
-       var Global = typeof window !== 'undefined' ? window : commonjsGlobal;
-       var util = {
-         assign: assign,
-         create: create$1,
-         trim: trim$3,
-         bind: bind$1,
-         slice: slice$2,
-         each: each,
-         map: map$1,
-         pluck: pluck,
-         isList: isList,
-         isFunction: isFunction,
-         isObject: isObject$2,
-         Global: Global
-       };
+           if (key === 'ow') {
+             qParams = item.identifier;
+           } else if (key === 'mr') {
+             qParams.tileX = item.identifier.x;
+             qParams.tileY = item.identifier.y;
+           } else if (key === 'tr') {
+             qParams.targetId = item.identifier;
+           }
 
-       function make_assign() {
-         if (Object.assign) {
-           return Object.assign;
-         } else {
-           return function shimAssign(obj, props1, props2, etc) {
-             for (var i = 1; i < arguments.length; i++) {
-               each(Object(arguments[i]), function (val, key) {
-                 obj[key] = val;
-               });
-             }
+           var url = "".concat(_impOsmUrls[key], "/retrieveComments?") + utilQsString(qParams);
 
-             return obj;
-           };
-         }
-       }
+           var cacheComments = function cacheComments(data) {
+             // Assign directly for immediate use afterwards
+             // comments are served newest to oldest
+             item.comments = data.comments ? data.comments.reverse() : [];
 
-       function make_create() {
-         if (Object.create) {
-           return function create(obj, assignProps1, assignProps2, etc) {
-             var assignArgsList = slice$2(arguments, 1);
-             return assign.apply(this, [Object.create(obj)].concat(assignArgsList));
+             _this2.replaceItem(item);
            };
-         } else {
-           var F = function F() {}; // eslint-disable-line no-inner-declarations
 
+           return d3_json(url).then(cacheComments).then(function () {
+             return item;
+           });
+         },
+         postUpdate: function postUpdate(d, callback) {
+           if (!serviceOsm.authenticated()) {
+             // Username required in payload
+             return callback({
+               message: 'Not Authenticated',
+               status: -3
+             }, d);
+           }
 
-           return function create(obj, assignProps1, assignProps2, etc) {
-             var assignArgsList = slice$2(arguments, 1);
-             F.prototype = obj;
-             return assign.apply(this, [new F()].concat(assignArgsList));
-           };
-         }
-       }
+           if (_cache$1.inflightPost[d.id]) {
+             return callback({
+               message: 'Error update already inflight',
+               status: -2
+             }, d);
+           } // Payload can only be sent once username is established
 
-       function make_trim() {
-         if (String.prototype.trim) {
-           return function trim(str) {
-             return String.prototype.trim.call(str);
-           };
-         } else {
-           return function trim(str) {
-             return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
-           };
-         }
-       }
 
-       function bind$1(obj, fn) {
-         return function () {
-           return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
-         };
-       }
+           serviceOsm.userDetails(sendPayload.bind(this));
 
-       function slice$2(arr, index) {
-         return Array.prototype.slice.call(arr, index || 0);
-       }
+           function sendPayload(err, user) {
+             var _this3 = this;
 
-       function each(obj, fn) {
-         pluck(obj, function (val, key) {
-           fn(val, key);
-           return false;
-         });
-       }
+             if (err) {
+               return callback(err, d);
+             }
 
-       function map$1(obj, fn) {
-         var res = isList(obj) ? [] : {};
-         pluck(obj, function (v, k) {
-           res[k] = fn(v, k);
-           return false;
-         });
-         return res;
-       }
+             var key = d.issueKey;
+             var url = "".concat(_impOsmUrls[key], "/comment");
+             var payload = {
+               username: user.display_name,
+               targetIds: [d.identifier]
+             };
 
-       function pluck(obj, fn) {
-         if (isList(obj)) {
-           for (var i = 0; i < obj.length; i++) {
-             if (fn(obj[i], i)) {
-               return obj[i];
-             }
-           }
-         } else {
-           for (var key in obj) {
-             if (obj.hasOwnProperty(key)) {
-               if (fn(obj[key], key)) {
-                 return obj[key];
-               }
+             if (d.newStatus) {
+               payload.status = d.newStatus;
+               payload.text = 'status changed';
+             } // Comment take place of default text
+
+
+             if (d.newComment) {
+               payload.text = d.newComment;
              }
-           }
-         }
-       }
 
-       function isList(val) {
-         return val != null && typeof val != 'function' && typeof val.length == 'number';
-       }
+             var controller = new AbortController();
+             _cache$1.inflightPost[d.id] = controller;
+             var options = {
+               method: 'POST',
+               signal: controller.signal,
+               body: JSON.stringify(payload)
+             };
+             d3_json(url, options).then(function () {
+               delete _cache$1.inflightPost[d.id]; // Just a comment, update error in cache
 
-       function isFunction(val) {
-         return val && {}.toString.call(val) === '[object Function]';
-       }
+               if (!d.newStatus) {
+                 var now = new Date();
+                 var comments = d.comments ? d.comments : [];
+                 comments.push({
+                   username: payload.username,
+                   text: payload.text,
+                   timestamp: now.getTime() / 1000
+                 });
 
-       function isObject$2(val) {
-         return val && {}.toString.call(val) === '[object Object]';
-       }
+                 _this3.replaceItem(d.update({
+                   comments: comments,
+                   newComment: undefined
+                 }));
+               } else {
+                 _this3.removeItem(d);
 
-       var slice$3 = util.slice;
-       var pluck$1 = util.pluck;
-       var each$1 = util.each;
-       var bind$2 = util.bind;
-       var create$2 = util.create;
-       var isList$1 = util.isList;
-       var isFunction$1 = util.isFunction;
-       var isObject$3 = util.isObject;
-       var storeEngine = {
-         createStore: _createStore
-       };
-       var storeAPI = {
-         version: '2.0.12',
-         enabled: false,
-         // get returns the value of the given key. If that value
-         // is undefined, it returns optionalDefaultValue instead.
-         get: function get(key, optionalDefaultValue) {
-           var data = this.storage.read(this._namespacePrefix + key);
-           return this._deserialize(data, optionalDefaultValue);
-         },
-         // set will store the given value at key and returns value.
-         // Calling set with value === undefined is equivalent to calling remove.
-         set: function set(key, value) {
-           if (value === undefined) {
-             return this.remove(key);
-           }
+                 if (d.newStatus === 'SOLVED') {
+                   // Keep track of the number of issues closed per type to tag the changeset
+                   if (!(d.issueKey in _cache$1.closed)) {
+                     _cache$1.closed[d.issueKey] = 0;
+                   }
 
-           this.storage.write(this._namespacePrefix + key, this._serialize(value));
-           return value;
-         },
-         // remove deletes the key and value stored at the given key.
-         remove: function remove(key) {
-           this.storage.remove(this._namespacePrefix + key);
+                   _cache$1.closed[d.issueKey] += 1;
+                 }
+               }
+
+               if (callback) callback(null, d);
+             })["catch"](function (err) {
+               delete _cache$1.inflightPost[d.id];
+               if (callback) callback(err.message);
+             });
+           }
          },
-         // each will call the given callback once for each key-value pair
-         // in this store.
-         each: function each(callback) {
-           var self = this;
-           this.storage.each(function (val, namespacedKey) {
-             callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
+         // Get all cached QAItems covering the viewport
+         getItems: function getItems(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return _cache$1.rtree.search(bbox).map(function (d) {
+             return d.data;
            });
          },
-         // clearAll will remove all the stored key-value pairs in this store.
-         clearAll: function clearAll() {
-           this.storage.clearAll();
+         // Get a QAItem from cache
+         // NOTE: Don't change method name until UI v3 is merged
+         getError: function getError(id) {
+           return _cache$1.data[id];
          },
-         // additional functionality that can't live in plugins
-         // ---------------------------------------------------
-         // hasNamespace returns true if this store instance has the given namespace.
-         hasNamespace: function hasNamespace(namespace) {
-           return this._namespacePrefix == '__storejs_' + namespace + '_';
+         // get the name of the icon to display for this item
+         getIcon: function getIcon(itemType) {
+           return _impOsmData.icons[itemType];
          },
-         // createStore creates a store.js instance with the first
-         // functioning storage in the list of storage candidates,
-         // and applies the the given mixins to the instance.
-         createStore: function createStore() {
-           return _createStore.apply(this, arguments);
+         // Replace a single QAItem in the cache
+         replaceItem: function replaceItem(issue) {
+           if (!(issue instanceof QAItem) || !issue.id) return;
+           _cache$1.data[issue.id] = issue;
+           updateRtree$2(encodeIssueRtree$1(issue), true); // true = replace
+
+           return issue;
          },
-         addPlugin: function addPlugin(plugin) {
-           this._addPlugin(plugin);
+         // Remove a single QAItem from the cache
+         removeItem: function removeItem(issue) {
+           if (!(issue instanceof QAItem) || !issue.id) return;
+           delete _cache$1.data[issue.id];
+           updateRtree$2(encodeIssueRtree$1(issue), false); // false = remove
          },
-         namespace: function namespace(_namespace) {
-           return _createStore(this.storage, this.plugins, _namespace);
+         // Used to populate `closed:improveosm:*` changeset tags
+         getClosedCounts: function getClosedCounts() {
+           return _cache$1.closed;
          }
        };
 
-       function _warn() {
-         var _console = typeof console == 'undefined' ? null : console;
-
-         if (!_console) {
-           return;
-         }
+       var defaults$5 = {exports: {}};
 
-         var fn = _console.warn ? _console.warn : _console.log;
-         fn.apply(_console, arguments);
-       }
+       function getDefaults$1() {
+         return {
+           baseUrl: null,
+           breaks: false,
+           gfm: true,
+           headerIds: true,
+           headerPrefix: '',
+           highlight: null,
+           langPrefix: 'language-',
+           mangle: true,
+           pedantic: false,
+           renderer: null,
+           sanitize: false,
+           sanitizer: null,
+           silent: false,
+           smartLists: false,
+           smartypants: false,
+           tokenizer: null,
+           walkTokens: null,
+           xhtml: false
+         };
+       }
+
+       function changeDefaults$1(newDefaults) {
+         defaults$5.exports.defaults = newDefaults;
+       }
+
+       defaults$5.exports = {
+         defaults: getDefaults$1(),
+         getDefaults: getDefaults$1,
+         changeDefaults: changeDefaults$1
+       };
 
-       function _createStore(storages, plugins, namespace) {
-         if (!namespace) {
-           namespace = '';
-         }
+       var escapeTest = /[&<>"']/;
+       var escapeReplace = /[&<>"']/g;
+       var escapeTestNoEncode = /[<>"']|&(?!#?\w+;)/;
+       var escapeReplaceNoEncode = /[<>"']|&(?!#?\w+;)/g;
+       var escapeReplacements = {
+         '&': '&amp;',
+         '<': '&lt;',
+         '>': '&gt;',
+         '"': '&quot;',
+         "'": '&#39;'
+       };
 
-         if (storages && !isList$1(storages)) {
-           storages = [storages];
-         }
+       var getEscapeReplacement = function getEscapeReplacement(ch) {
+         return escapeReplacements[ch];
+       };
 
-         if (plugins && !isList$1(plugins)) {
-           plugins = [plugins];
+       function escape$3(html, encode) {
+         if (encode) {
+           if (escapeTest.test(html)) {
+             return html.replace(escapeReplace, getEscapeReplacement);
+           }
+         } else {
+           if (escapeTestNoEncode.test(html)) {
+             return html.replace(escapeReplaceNoEncode, getEscapeReplacement);
+           }
          }
 
-         var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
-         var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
-         var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
-
-         if (!legalNamespaces.test(namespace)) {
-           throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
-         }
+         return html;
+       }
 
-         var _privateStoreProps = {
-           _namespacePrefix: namespacePrefix,
-           _namespaceRegexp: namespaceRegexp,
-           _testStorage: function _testStorage(storage) {
-             try {
-               var testStr = '__storejs__test__';
-               storage.write(testStr, testStr);
-               var ok = storage.read(testStr) === testStr;
-               storage.remove(testStr);
-               return ok;
-             } catch (e) {
-               return false;
-             }
-           },
-           _assignPluginFnProp: function _assignPluginFnProp(pluginFnProp, propName) {
-             var oldFn = this[propName];
+       var unescapeTest = /&(#(?:\d+)|(?:#x[0-9A-Fa-f]+)|(?:\w+));?/ig;
 
-             this[propName] = function pluginFn() {
-               var args = slice$3(arguments, 0);
-               var self = this; // super_fn calls the old function which was overwritten by
-               // this mixin.
+       function unescape$2(html) {
+         // explicitly match decimal, hex, and named HTML entities
+         return html.replace(unescapeTest, function (_, n) {
+           n = n.toLowerCase();
+           if (n === 'colon') return ':';
 
-               function super_fn() {
-                 if (!oldFn) {
-                   return;
-                 }
+           if (n.charAt(0) === '#') {
+             return n.charAt(1) === 'x' ? String.fromCharCode(parseInt(n.substring(2), 16)) : String.fromCharCode(+n.substring(1));
+           }
 
-                 each$1(arguments, function (arg, i) {
-                   args[i] = arg;
-                 });
-                 return oldFn.apply(self, args);
-               } // Give mixing function access to super_fn by prefixing all mixin function
-               // arguments with super_fn.
+           return '';
+         });
+       }
 
+       var caret = /(^|[^\[])\^/g;
 
-               var newFnArgs = [super_fn].concat(args);
-               return pluginFnProp.apply(self, newFnArgs);
-             };
-           },
-           _serialize: function _serialize(obj) {
-             return JSON.stringify(obj);
+       function edit$1(regex, opt) {
+         regex = regex.source || regex;
+         opt = opt || '';
+         var obj = {
+           replace: function replace(name, val) {
+             val = val.source || val;
+             val = val.replace(caret, '$1');
+             regex = regex.replace(name, val);
+             return obj;
            },
-           _deserialize: function _deserialize(strVal, defaultVal) {
-             if (!strVal) {
-               return defaultVal;
-             } // It is possible that a raw string value has been previously stored
-             // in a storage without using store.js, meaning it will be a raw
-             // string value instead of a JSON serialized string. By defaulting
-             // to the raw string value in case of a JSON parse error, we allow
-             // for past stored values to be forwards-compatible with store.js
+           getRegex: function getRegex() {
+             return new RegExp(regex, opt);
+           }
+         };
+         return obj;
+       }
 
+       var nonWordAndColonTest = /[^\w:]/g;
+       var originIndependentUrl = /^$|^[a-z][a-z0-9+.-]*:|^[?#]/i;
 
-             var val = '';
+       function cleanUrl$1(sanitize, base, href) {
+         if (sanitize) {
+           var prot;
 
-             try {
-               val = JSON.parse(strVal);
-             } catch (e) {
-               val = strVal;
-             }
+           try {
+             prot = decodeURIComponent(unescape$2(href)).replace(nonWordAndColonTest, '').toLowerCase();
+           } catch (e) {
+             return null;
+           }
 
-             return val !== undefined ? val : defaultVal;
-           },
-           _addStorage: function _addStorage(storage) {
-             if (this.enabled) {
-               return;
-             }
+           if (prot.indexOf('javascript:') === 0 || prot.indexOf('vbscript:') === 0 || prot.indexOf('data:') === 0) {
+             return null;
+           }
+         }
 
-             if (this._testStorage(storage)) {
-               this.storage = storage;
-               this.enabled = true;
-             }
-           },
-           _addPlugin: function _addPlugin(plugin) {
-             var self = this; // If the plugin is an array, then add all plugins in the array.
-             // This allows for a plugin to depend on other plugins.
+         if (base && !originIndependentUrl.test(href)) {
+           href = resolveUrl$2(base, href);
+         }
 
-             if (isList$1(plugin)) {
-               each$1(plugin, function (plugin) {
-                 self._addPlugin(plugin);
-               });
-               return;
-             } // Keep track of all plugins we've seen so far, so that we
-             // don't add any of them twice.
+         try {
+           href = encodeURI(href).replace(/%25/g, '%');
+         } catch (e) {
+           return null;
+         }
 
+         return href;
+       }
 
-             var seenPlugin = pluck$1(this.plugins, function (seenPlugin) {
-               return plugin === seenPlugin;
-             });
+       var baseUrls = {};
+       var justDomain = /^[^:]+:\/*[^/]*$/;
+       var protocol = /^([^:]+:)[\s\S]*$/;
+       var domain = /^([^:]+:\/*[^/]*)[\s\S]*$/;
 
-             if (seenPlugin) {
-               return;
-             }
+       function resolveUrl$2(base, href) {
+         if (!baseUrls[' ' + base]) {
+           // we can ignore everything in base after the last slash of its path component,
+           // but we might need to add _that_
+           // https://tools.ietf.org/html/rfc3986#section-3
+           if (justDomain.test(base)) {
+             baseUrls[' ' + base] = base + '/';
+           } else {
+             baseUrls[' ' + base] = rtrim$1(base, '/', true);
+           }
+         }
 
-             this.plugins.push(plugin); // Check that the plugin is properly formed
+         base = baseUrls[' ' + base];
+         var relativeBase = base.indexOf(':') === -1;
 
-             if (!isFunction$1(plugin)) {
-               throw new Error('Plugins must be function values that return objects');
-             }
+         if (href.substring(0, 2) === '//') {
+           if (relativeBase) {
+             return href;
+           }
 
-             var pluginProperties = plugin.call(this);
+           return base.replace(protocol, '$1') + href;
+         } else if (href.charAt(0) === '/') {
+           if (relativeBase) {
+             return href;
+           }
 
-             if (!isObject$3(pluginProperties)) {
-               throw new Error('Plugins must return an object of function properties');
-             } // Add the plugin function properties to this store instance.
+           return base.replace(domain, '$1') + href;
+         } else {
+           return base + href;
+         }
+       }
 
+       var noopTest$1 = {
+         exec: function noopTest() {}
+       };
 
-             each$1(pluginProperties, function (pluginFnProp, propName) {
-               if (!isFunction$1(pluginFnProp)) {
-                 throw new Error('Bad plugin property: ' + propName + ' from plugin ' + plugin.name + '. Plugins should only return functions.');
-               }
+       function merge$2(obj) {
+         var i = 1,
+             target,
+             key;
 
-               self._assignPluginFnProp(pluginFnProp, propName);
-             });
-           },
-           // Put deprecated properties in the private API, so as to not expose it to accidential
-           // discovery through inspection of the store object.
-           // Deprecated: addStorage
-           addStorage: function addStorage(storage) {
-             _warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
+         for (; i < arguments.length; i++) {
+           target = arguments[i];
 
-             this._addStorage(storage);
-           }
-         };
-         var store = create$2(_privateStoreProps, storeAPI, {
-           plugins: []
-         });
-         store.raw = {};
-         each$1(store, function (prop, propName) {
-           if (isFunction$1(prop)) {
-             store.raw[propName] = bind$2(store, prop);
+           for (key in target) {
+             if (Object.prototype.hasOwnProperty.call(target, key)) {
+               obj[key] = target[key];
+             }
            }
-         });
-         each$1(storages, function (storage) {
-           store._addStorage(storage);
-         });
-         each$1(plugins, function (plugin) {
-           store._addPlugin(plugin);
-         });
-         return store;
+         }
+
+         return obj;
        }
 
-       var Global$1 = util.Global;
-       var localStorage_1 = {
-         name: 'localStorage',
-         read: read,
-         write: write,
-         each: each$2,
-         remove: remove$2,
-         clearAll: clearAll
-       };
+       function splitCells$1(tableRow, count) {
+         // ensure that every cell-delimiting pipe has a space
+         // before it to distinguish it from an escaped pipe
+         var row = tableRow.replace(/\|/g, function (match, offset, str) {
+           var escaped = false,
+               curr = offset;
 
-       function localStorage$1() {
-         return Global$1.localStorage;
-       }
+           while (--curr >= 0 && str[curr] === '\\') {
+             escaped = !escaped;
+           }
 
-       function read(key) {
-         return localStorage$1().getItem(key);
-       }
+           if (escaped) {
+             // odd number of slashes means | is escaped
+             // so we leave it alone
+             return '|';
+           } else {
+             // add space before unescaped |
+             return ' |';
+           }
+         }),
+             cells = row.split(/ \|/);
+         var i = 0;
 
-       function write(key, data) {
-         return localStorage$1().setItem(key, data);
-       }
+         if (cells.length > count) {
+           cells.splice(count);
+         } else {
+           while (cells.length < count) {
+             cells.push('');
+           }
+         }
 
-       function each$2(fn) {
-         for (var i = localStorage$1().length - 1; i >= 0; i--) {
-           var key = localStorage$1().key(i);
-           fn(read(key), key);
+         for (; i < cells.length; i++) {
+           // leading or trailing whitespace is ignored per the gfm spec
+           cells[i] = cells[i].trim().replace(/\\\|/g, '|');
          }
-       }
 
-       function remove$2(key) {
-         return localStorage$1().removeItem(key);
-       }
+         return cells;
+       } // Remove trailing 'c's. Equivalent to str.replace(/c*$/, '').
+       // /c*$/ is vulnerable to REDOS.
+       // invert: Remove suffix of non-c chars instead. Default falsey.
 
-       function clearAll() {
-         return localStorage$1().clear();
-       }
 
-       // versions 6 and 7, where no localStorage, etc
-       // is available.
+       function rtrim$1(str, c, invert) {
+         var l = str.length;
 
-       var Global$2 = util.Global;
-       var oldFFGlobalStorage = {
-         name: 'oldFF-globalStorage',
-         read: read$1,
-         write: write$1,
-         each: each$3,
-         remove: remove$3,
-         clearAll: clearAll$1
-       };
-       var globalStorage = Global$2.globalStorage;
+         if (l === 0) {
+           return '';
+         } // Length of suffix matching the invert condition.
 
-       function read$1(key) {
-         return globalStorage[key];
-       }
 
-       function write$1(key, data) {
-         globalStorage[key] = data;
-       }
+         var suffLen = 0; // Step left until we fail to match the invert condition.
 
-       function each$3(fn) {
-         for (var i = globalStorage.length - 1; i >= 0; i--) {
-           var key = globalStorage.key(i);
-           fn(globalStorage[key], key);
-         }
-       }
+         while (suffLen < l) {
+           var currChar = str.charAt(l - suffLen - 1);
 
-       function remove$3(key) {
-         return globalStorage.removeItem(key);
-       }
+           if (currChar === c && !invert) {
+             suffLen++;
+           } else if (currChar !== c && invert) {
+             suffLen++;
+           } else {
+             break;
+           }
+         }
 
-       function clearAll$1() {
-         each$3(function (key, _) {
-           delete globalStorage[key];
-         });
+         return str.substr(0, l - suffLen);
        }
 
-       // versions 6 and 7, where no localStorage, sessionStorage, etc
-       // is available.
-
-       var Global$3 = util.Global;
-       var oldIEUserDataStorage = {
-         name: 'oldIE-userDataStorage',
-         write: write$2,
-         read: read$2,
-         each: each$4,
-         remove: remove$4,
-         clearAll: clearAll$2
-       };
-       var storageName = 'storejs';
-       var doc = Global$3.document;
+       function findClosingBracket$1(str, b) {
+         if (str.indexOf(b[1]) === -1) {
+           return -1;
+         }
 
-       var _withStorageEl = _makeIEStorageElFunction();
+         var l = str.length;
+         var level = 0,
+             i = 0;
 
-       var disable = (Global$3.navigator ? Global$3.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
+         for (; i < l; i++) {
+           if (str[i] === '\\') {
+             i++;
+           } else if (str[i] === b[0]) {
+             level++;
+           } else if (str[i] === b[1]) {
+             level--;
 
-       function write$2(unfixedKey, data) {
-         if (disable) {
-           return;
+             if (level < 0) {
+               return i;
+             }
+           }
          }
 
-         var fixedKey = fixKey(unfixedKey);
-
-         _withStorageEl(function (storageEl) {
-           storageEl.setAttribute(fixedKey, data);
-           storageEl.save(storageName);
-         });
+         return -1;
        }
 
-       function read$2(unfixedKey) {
-         if (disable) {
-           return;
+       function checkSanitizeDeprecation$1(opt) {
+         if (opt && opt.sanitize && !opt.silent) {
+           console.warn('marked(): sanitize and sanitizer parameters are deprecated since version 0.7.0, should not be used and will be removed in the future. Read more here: https://marked.js.org/#/USING_ADVANCED.md#options');
          }
+       } // copied from https://stackoverflow.com/a/5450113/806777
 
-         var fixedKey = fixKey(unfixedKey);
-         var res = null;
-
-         _withStorageEl(function (storageEl) {
-           res = storageEl.getAttribute(fixedKey);
-         });
 
-         return res;
-       }
+       function repeatString$1(pattern, count) {
+         if (count < 1) {
+           return '';
+         }
 
-       function each$4(callback) {
-         _withStorageEl(function (storageEl) {
-           var attributes = storageEl.XMLDocument.documentElement.attributes;
+         var result = '';
 
-           for (var i = attributes.length - 1; i >= 0; i--) {
-             var attr = attributes[i];
-             callback(storageEl.getAttribute(attr.name), attr.name);
+         while (count > 1) {
+           if (count & 1) {
+             result += pattern;
            }
-         });
-       }
 
-       function remove$4(unfixedKey) {
-         var fixedKey = fixKey(unfixedKey);
+           count >>= 1;
+           pattern += pattern;
+         }
 
-         _withStorageEl(function (storageEl) {
-           storageEl.removeAttribute(fixedKey);
-           storageEl.save(storageName);
-         });
+         return result + pattern;
        }
 
-       function clearAll$2() {
-         _withStorageEl(function (storageEl) {
-           var attributes = storageEl.XMLDocument.documentElement.attributes;
-           storageEl.load(storageName);
-
-           for (var i = attributes.length - 1; i >= 0; i--) {
-             storageEl.removeAttribute(attributes[i].name);
-           }
-
-           storageEl.save(storageName);
-         });
-       } // Helpers
-       //////////
-       // In IE7, keys cannot start with a digit or contain certain chars.
-       // See https://github.com/marcuswestin/store.js/issues/40
-       // See https://github.com/marcuswestin/store.js/issues/83
-
+       var helpers = {
+         escape: escape$3,
+         unescape: unescape$2,
+         edit: edit$1,
+         cleanUrl: cleanUrl$1,
+         resolveUrl: resolveUrl$2,
+         noopTest: noopTest$1,
+         merge: merge$2,
+         splitCells: splitCells$1,
+         rtrim: rtrim$1,
+         findClosingBracket: findClosingBracket$1,
+         checkSanitizeDeprecation: checkSanitizeDeprecation$1,
+         repeatString: repeatString$1
+       };
 
-       var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
+       var defaults$4 = defaults$5.exports.defaults;
+       var rtrim = helpers.rtrim,
+           splitCells = helpers.splitCells,
+           _escape = helpers.escape,
+           findClosingBracket = helpers.findClosingBracket;
 
-       function fixKey(key) {
-         return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
-       }
+       function outputLink(cap, link, raw) {
+         var href = link.href;
+         var title = link.title ? _escape(link.title) : null;
+         var text = cap[1].replace(/\\([\[\]])/g, '$1');
 
-       function _makeIEStorageElFunction() {
-         if (!doc || !doc.documentElement || !doc.documentElement.addBehavior) {
-           return null;
+         if (cap[0].charAt(0) !== '!') {
+           return {
+             type: 'link',
+             raw: raw,
+             href: href,
+             title: title,
+             text: text
+           };
+         } else {
+           return {
+             type: 'image',
+             raw: raw,
+             href: href,
+             title: title,
+             text: _escape(text)
+           };
          }
+       }
 
-         var scriptTag = 'script',
-             storageOwner,
-             storageContainer,
-             storageEl; // Since #userData storage applies only to specific paths, we need to
-         // somehow link our data to a specific path.  We choose /favicon.ico
-         // as a pretty safe option, since all browsers already make a request to
-         // this URL anyway and being a 404 will not hurt us here.  We wrap an
-         // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
-         // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
-         // since the iframe access rules appear to allow direct access and
-         // manipulation of the document element, even for a 404 page.  This
-         // document can be used instead of the current document (which would
-         // have been limited to the current path) to perform #userData storage.
+       function indentCodeCompensation(raw, text) {
+         var matchIndentToCode = raw.match(/^(\s+)(?:```)/);
 
-         try {
-           /* global ActiveXObject */
-           storageContainer = new ActiveXObject('htmlfile');
-           storageContainer.open();
-           storageContainer.write('<' + scriptTag + '>document.w=window</' + scriptTag + '><iframe src="/favicon.ico"></iframe>');
-           storageContainer.close();
-           storageOwner = storageContainer.w.frames[0].document;
-           storageEl = storageOwner.createElement('div');
-         } catch (e) {
-           // somehow ActiveXObject instantiation failed (perhaps some special
-           // security settings or otherwse), fall back to per-path storage
-           storageEl = doc.createElement('div');
-           storageOwner = doc.body;
+         if (matchIndentToCode === null) {
+           return text;
          }
 
-         return function (storeFunction) {
-           var args = [].slice.call(arguments, 0);
-           args.unshift(storageEl); // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
-           // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
+         var indentToCode = matchIndentToCode[1];
+         return text.split('\n').map(function (node) {
+           var matchIndentInNode = node.match(/^\s+/);
 
-           storageOwner.appendChild(storageEl);
-           storageEl.addBehavior('#default#userData');
-           storageEl.load(storageName);
-           storeFunction.apply(this, args);
-           storageOwner.removeChild(storageEl);
-           return;
-         };
+           if (matchIndentInNode === null) {
+             return node;
+           }
+
+           var _matchIndentInNode = _slicedToArray(matchIndentInNode, 1),
+               indentInNode = _matchIndentInNode[0];
+
+           if (indentInNode.length >= indentToCode.length) {
+             return node.slice(indentToCode.length);
+           }
+
+           return node;
+         }).join('\n');
        }
+       /**
+        * Tokenizer
+        */
 
-       // doesn't work but cookies do. This implementation is adopted from
-       // https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
 
-       var Global$4 = util.Global;
-       var trim$4 = util.trim;
-       var cookieStorage = {
-         name: 'cookieStorage',
-         read: read$3,
-         write: write$3,
-         each: each$5,
-         remove: remove$5,
-         clearAll: clearAll$3
-       };
-       var doc$1 = Global$4.document;
+       var Tokenizer_1 = /*#__PURE__*/function () {
+         function Tokenizer(options) {
+           _classCallCheck$1(this, Tokenizer);
 
-       function read$3(key) {
-         if (!key || !_has(key)) {
-           return null;
+           this.options = options || defaults$4;
          }
 
-         var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
-         return unescape(doc$1.cookie.replace(new RegExp(regexpStr), "$1"));
-       }
+         _createClass$1(Tokenizer, [{
+           key: "space",
+           value: function space(src) {
+             var cap = this.rules.block.newline.exec(src);
 
-       function each$5(callback) {
-         var cookies = doc$1.cookie.split(/; ?/g);
+             if (cap) {
+               if (cap[0].length > 1) {
+                 return {
+                   type: 'space',
+                   raw: cap[0]
+                 };
+               }
 
-         for (var i = cookies.length - 1; i >= 0; i--) {
-           if (!trim$4(cookies[i])) {
-             continue;
+               return {
+                 raw: '\n'
+               };
+             }
            }
+         }, {
+           key: "code",
+           value: function code(src) {
+             var cap = this.rules.block.code.exec(src);
 
-           var kvp = cookies[i].split('=');
-           var key = unescape(kvp[0]);
-           var val = unescape(kvp[1]);
-           callback(val, key);
-         }
-       }
+             if (cap) {
+               var text = cap[0].replace(/^ {1,4}/gm, '');
+               return {
+                 type: 'code',
+                 raw: cap[0],
+                 codeBlockStyle: 'indented',
+                 text: !this.options.pedantic ? rtrim(text, '\n') : text
+               };
+             }
+           }
+         }, {
+           key: "fences",
+           value: function fences(src) {
+             var cap = this.rules.block.fences.exec(src);
 
-       function write$3(key, data) {
-         if (!key) {
-           return;
-         }
+             if (cap) {
+               var raw = cap[0];
+               var text = indentCodeCompensation(raw, cap[3] || '');
+               return {
+                 type: 'code',
+                 raw: raw,
+                 lang: cap[2] ? cap[2].trim() : cap[2],
+                 text: text
+               };
+             }
+           }
+         }, {
+           key: "heading",
+           value: function heading(src) {
+             var cap = this.rules.block.heading.exec(src);
 
-         doc$1.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
-       }
+             if (cap) {
+               var text = cap[2].trim(); // remove trailing #s
 
-       function remove$5(key) {
-         if (!key || !_has(key)) {
-           return;
-         }
+               if (/#$/.test(text)) {
+                 var trimmed = rtrim(text, '#');
 
-         doc$1.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
-       }
+                 if (this.options.pedantic) {
+                   text = trimmed.trim();
+                 } else if (!trimmed || / $/.test(trimmed)) {
+                   // CommonMark requires space before trailing #s
+                   text = trimmed.trim();
+                 }
+               }
 
-       function clearAll$3() {
-         each$5(function (_, key) {
-           remove$5(key);
-         });
-       }
+               return {
+                 type: 'heading',
+                 raw: cap[0],
+                 depth: cap[1].length,
+                 text: text
+               };
+             }
+           }
+         }, {
+           key: "nptable",
+           value: function nptable(src) {
+             var cap = this.rules.block.nptable.exec(src);
 
-       function _has(key) {
-         return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc$1.cookie);
-       }
+             if (cap) {
+               var item = {
+                 type: 'table',
+                 header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+                 align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+                 cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : [],
+                 raw: cap[0]
+               };
 
-       var Global$5 = util.Global;
-       var sessionStorage_1 = {
-         name: 'sessionStorage',
-         read: read$4,
-         write: write$4,
-         each: each$6,
-         remove: remove$6,
-         clearAll: clearAll$4
-       };
+               if (item.header.length === item.align.length) {
+                 var l = item.align.length;
+                 var i;
 
-       function sessionStorage() {
-         return Global$5.sessionStorage;
-       }
+                 for (i = 0; i < l; i++) {
+                   if (/^ *-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'right';
+                   } else if (/^ *:-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'center';
+                   } else if (/^ *:-+ *$/.test(item.align[i])) {
+                     item.align[i] = 'left';
+                   } else {
+                     item.align[i] = null;
+                   }
+                 }
 
-       function read$4(key) {
-         return sessionStorage().getItem(key);
-       }
+                 l = item.cells.length;
 
-       function write$4(key, data) {
-         return sessionStorage().setItem(key, data);
-       }
+                 for (i = 0; i < l; i++) {
+                   item.cells[i] = splitCells(item.cells[i], item.header.length);
+                 }
 
-       function each$6(fn) {
-         for (var i = sessionStorage().length - 1; i >= 0; i--) {
-           var key = sessionStorage().key(i);
-           fn(read$4(key), key);
-         }
-       }
+                 return item;
+               }
+             }
+           }
+         }, {
+           key: "hr",
+           value: function hr(src) {
+             var cap = this.rules.block.hr.exec(src);
 
-       function remove$6(key) {
-         return sessionStorage().removeItem(key);
-       }
+             if (cap) {
+               return {
+                 type: 'hr',
+                 raw: cap[0]
+               };
+             }
+           }
+         }, {
+           key: "blockquote",
+           value: function blockquote(src) {
+             var cap = this.rules.block.blockquote.exec(src);
 
-       function clearAll$4() {
-         return sessionStorage().clear();
-       }
+             if (cap) {
+               var text = cap[0].replace(/^ *> ?/gm, '');
+               return {
+                 type: 'blockquote',
+                 raw: cap[0],
+                 text: text
+               };
+             }
+           }
+         }, {
+           key: "list",
+           value: function list(src) {
+             var cap = this.rules.block.list.exec(src);
 
-       // memoryStorage is a useful last fallback to ensure that the store
-       // is functions (meaning store.get(), store.set(), etc will all function).
-       // However, stored values will not persist when the browser navigates to
-       // a new page or reloads the current page.
-       var memoryStorage_1 = {
-         name: 'memoryStorage',
-         read: read$5,
-         write: write$5,
-         each: each$7,
-         remove: remove$7,
-         clearAll: clearAll$5
-       };
-       var memoryStorage = {};
+             if (cap) {
+               var raw = cap[0];
+               var bull = cap[2];
+               var isordered = bull.length > 1;
+               var list = {
+                 type: 'list',
+                 raw: raw,
+                 ordered: isordered,
+                 start: isordered ? +bull.slice(0, -1) : '',
+                 loose: false,
+                 items: []
+               }; // Get each top-level item.
 
-       function read$5(key) {
-         return memoryStorage[key];
-       }
+               var itemMatch = cap[0].match(this.rules.block.item);
+               var next = false,
+                   item,
+                   space,
+                   bcurr,
+                   bnext,
+                   addBack,
+                   loose,
+                   istask,
+                   ischecked,
+                   endMatch;
+               var l = itemMatch.length;
+               bcurr = this.rules.block.listItemStart.exec(itemMatch[0]);
 
-       function write$5(key, data) {
-         memoryStorage[key] = data;
-       }
+               for (var i = 0; i < l; i++) {
+                 item = itemMatch[i];
+                 raw = item;
+
+                 if (!this.options.pedantic) {
+                   // Determine if current item contains the end of the list
+                   endMatch = item.match(new RegExp('\\n\\s*\\n {0,' + (bcurr[0].length - 1) + '}\\S'));
+
+                   if (endMatch) {
+                     addBack = item.length - endMatch.index + itemMatch.slice(i + 1).join('\n').length;
+                     list.raw = list.raw.substring(0, list.raw.length - addBack);
+                     item = item.substring(0, endMatch.index);
+                     raw = item;
+                     l = i + 1;
+                   }
+                 } // Determine whether the next list item belongs here.
+                 // Backpedal if it does not belong in this list.
 
-       function each$7(callback) {
-         for (var key in memoryStorage) {
-           if (memoryStorage.hasOwnProperty(key)) {
-             callback(memoryStorage[key], key);
-           }
-         }
-       }
 
-       function remove$7(key) {
-         delete memoryStorage[key];
-       }
+                 if (i !== l - 1) {
+                   bnext = this.rules.block.listItemStart.exec(itemMatch[i + 1]);
 
-       function clearAll$5(key) {
-         memoryStorage = {};
-       }
+                   if (!this.options.pedantic ? bnext[1].length >= bcurr[0].length || bnext[1].length > 3 : bnext[1].length > bcurr[1].length) {
+                     // nested list or continuation
+                     itemMatch.splice(i, 2, itemMatch[i] + (!this.options.pedantic && bnext[1].length < bcurr[0].length && !itemMatch[i].match(/\n$/) ? '' : '\n') + itemMatch[i + 1]);
+                     i--;
+                     l--;
+                     continue;
+                   } else if ( // different bullet style
+                   !this.options.pedantic || this.options.smartLists ? bnext[2][bnext[2].length - 1] !== bull[bull.length - 1] : isordered === (bnext[2].length === 1)) {
+                     addBack = itemMatch.slice(i + 1).join('\n').length;
+                     list.raw = list.raw.substring(0, list.raw.length - addBack);
+                     i = l - 1;
+                   }
 
-       var all = [// Listed in order of usage preference
-       localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
+                   bcurr = bnext;
+                 } // Remove the list item's bullet
+                 // so it is seen as the next token.
 
-       /* eslint-disable */
-       //  json2.js
-       //  2016-10-28
-       //  Public Domain.
-       //  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
-       //  See http://www.JSON.org/js.html
-       //  This code should be minified before deployment.
-       //  See http://javascript.crockford.com/jsmin.html
-       //  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
-       //  NOT CONTROL.
-       //  This file creates a global JSON object containing two methods: stringify
-       //  and parse. This file provides the ES5 JSON capability to ES3 systems.
-       //  If a project might run on IE8 or earlier, then this file should be included.
-       //  This file does nothing on ES5 systems.
-       //      JSON.stringify(value, replacer, space)
-       //          value       any JavaScript value, usually an object or array.
-       //          replacer    an optional parameter that determines how object
-       //                      values are stringified for objects. It can be a
-       //                      function or an array of strings.
-       //          space       an optional parameter that specifies the indentation
-       //                      of nested structures. If it is omitted, the text will
-       //                      be packed without extra whitespace. If it is a number,
-       //                      it will specify the number of spaces to indent at each
-       //                      level. If it is a string (such as "\t" or "&nbsp;"),
-       //                      it contains the characters used to indent at each level.
-       //          This method produces a JSON text from a JavaScript value.
-       //          When an object value is found, if the object contains a toJSON
-       //          method, its toJSON method will be called and the result will be
-       //          stringified. A toJSON method does not serialize: it returns the
-       //          value represented by the name/value pair that should be serialized,
-       //          or undefined if nothing should be serialized. The toJSON method
-       //          will be passed the key associated with the value, and this will be
-       //          bound to the value.
-       //          For example, this would serialize Dates as ISO strings.
-       //              Date.prototype.toJSON = function (key) {
-       //                  function f(n) {
-       //                      // Format integers to have at least two digits.
-       //                      return (n < 10)
-       //                          ? "0" + n
-       //                          : n;
-       //                  }
-       //                  return this.getUTCFullYear()   + "-" +
-       //                       f(this.getUTCMonth() + 1) + "-" +
-       //                       f(this.getUTCDate())      + "T" +
-       //                       f(this.getUTCHours())     + ":" +
-       //                       f(this.getUTCMinutes())   + ":" +
-       //                       f(this.getUTCSeconds())   + "Z";
-       //              };
-       //          You can provide an optional replacer method. It will be passed the
-       //          key and value of each member, with this bound to the containing
-       //          object. The value that is returned from your method will be
-       //          serialized. If your method returns undefined, then the member will
-       //          be excluded from the serialization.
-       //          If the replacer parameter is an array of strings, then it will be
-       //          used to select the members to be serialized. It filters the results
-       //          such that only members with keys listed in the replacer array are
-       //          stringified.
-       //          Values that do not have JSON representations, such as undefined or
-       //          functions, will not be serialized. Such values in objects will be
-       //          dropped; in arrays they will be replaced with null. You can use
-       //          a replacer function to replace those with JSON values.
-       //          JSON.stringify(undefined) returns undefined.
-       //          The optional space parameter produces a stringification of the
-       //          value that is filled with line breaks and indentation to make it
-       //          easier to read.
-       //          If the space parameter is a non-empty string, then that string will
-       //          be used for indentation. If the space parameter is a number, then
-       //          the indentation will be that many spaces.
-       //          Example:
-       //          text = JSON.stringify(["e", {pluribus: "unum"}]);
-       //          // text is '["e",{"pluribus":"unum"}]'
-       //          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
-       //          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
-       //          text = JSON.stringify([new Date()], function (key, value) {
-       //              return this[key] instanceof Date
-       //                  ? "Date(" + this[key] + ")"
-       //                  : value;
-       //          });
-       //          // text is '["Date(---current time---)"]'
-       //      JSON.parse(text, reviver)
-       //          This method parses a JSON text to produce an object or array.
-       //          It can throw a SyntaxError exception.
-       //          The optional reviver parameter is a function that can filter and
-       //          transform the results. It receives each of the keys and values,
-       //          and its return value is used instead of the original value.
-       //          If it returns what it received, then the structure is not modified.
-       //          If it returns undefined then the member is deleted.
-       //          Example:
-       //          // Parse the text. Values that look like ISO date strings will
-       //          // be converted to Date objects.
-       //          myData = JSON.parse(text, function (key, value) {
-       //              var a;
-       //              if (typeof value === "string") {
-       //                  a =
-       //   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
-       //                  if (a) {
-       //                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
-       //                          +a[5], +a[6]));
-       //                  }
-       //              }
-       //              return value;
-       //          });
-       //          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
-       //              var d;
-       //              if (typeof value === "string" &&
-       //                      value.slice(0, 5) === "Date(" &&
-       //                      value.slice(-1) === ")") {
-       //                  d = new Date(value.slice(5, -1));
-       //                  if (d) {
-       //                      return d;
-       //                  }
-       //              }
-       //              return value;
-       //          });
-       //  This is a reference implementation. You are free to copy, modify, or
-       //  redistribute.
 
-       /*jslint
-           eval, for, this
-       */
+                 space = item.length;
+                 item = item.replace(/^ *([*+-]|\d+[.)]) ?/, ''); // Outdent whatever the
+                 // list item contains. Hacky.
 
-       /*property
-           JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
-           getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
-           lastIndex, length, parse, prototype, push, replace, slice, stringify,
-           test, toJSON, toString, valueOf
-       */
-       // Create a JSON object only if one does not already exist. We create the
-       // methods in a closure to avoid creating global variables.
-       if ((typeof JSON === "undefined" ? "undefined" : _typeof(JSON)) !== "object") {
-         JSON = {};
-       }
+                 if (~item.indexOf('\n ')) {
+                   space -= item.length;
+                   item = !this.options.pedantic ? item.replace(new RegExp('^ {1,' + space + '}', 'gm'), '') : item.replace(/^ {1,4}/gm, '');
+                 } // trim item newlines at end
 
-       (function () {
 
-         var rx_one = /^[\],:{}\s]*$/;
-         var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
-         var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
-         var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
-         var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
-         var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+                 item = rtrim(item, '\n');
 
-         function f(n) {
-           // Format integers to have at least two digits.
-           return n < 10 ? "0" + n : n;
-         }
+                 if (i !== l - 1) {
+                   raw = raw + '\n';
+                 } // Determine whether item is loose or not.
+                 // Use: /(^|\n)(?! )[^\n]+\n\n(?!\s*$)/
+                 // for discount behavior.
 
-         function this_value() {
-           return this.valueOf();
-         }
 
-         if (typeof Date.prototype.toJSON !== "function") {
-           Date.prototype.toJSON = function () {
-             return isFinite(this.valueOf()) ? this.getUTCFullYear() + "-" + f(this.getUTCMonth() + 1) + "-" + f(this.getUTCDate()) + "T" + f(this.getUTCHours()) + ":" + f(this.getUTCMinutes()) + ":" + f(this.getUTCSeconds()) + "Z" : null;
-           };
+                 loose = next || /\n\n(?!\s*$)/.test(raw);
 
-           Boolean.prototype.toJSON = this_value;
-           Number.prototype.toJSON = this_value;
-           String.prototype.toJSON = this_value;
-         }
+                 if (i !== l - 1) {
+                   next = raw.slice(-2) === '\n\n';
+                   if (!loose) loose = next;
+                 }
 
-         var gap;
-         var indent;
-         var meta;
-         var rep;
+                 if (loose) {
+                   list.loose = true;
+                 } // Check for task list items
 
-         function quote(string) {
-           // If the string contains no control characters, no quote characters, and no
-           // backslash characters, then we can safely slap some quotes around it.
-           // Otherwise we must also replace the offending characters with safe escape
-           // sequences.
-           rx_escapable.lastIndex = 0;
-           return rx_escapable.test(string) ? "\"" + string.replace(rx_escapable, function (a) {
-             var c = meta[a];
-             return typeof c === "string" ? c : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-           }) + "\"" : "\"" + string + "\"";
-         }
 
-         function str(key, holder) {
-           // Produce a string from holder[key].
-           var i; // The loop counter.
+                 if (this.options.gfm) {
+                   istask = /^\[[ xX]\] /.test(item);
+                   ischecked = undefined;
+
+                   if (istask) {
+                     ischecked = item[1] !== ' ';
+                     item = item.replace(/^\[[ xX]\] +/, '');
+                   }
+                 }
+
+                 list.items.push({
+                   type: 'list_item',
+                   raw: raw,
+                   task: istask,
+                   checked: ischecked,
+                   loose: loose,
+                   text: item
+                 });
+               }
+
+               return list;
+             }
+           }
+         }, {
+           key: "html",
+           value: function html(src) {
+             var cap = this.rules.block.html.exec(src);
+
+             if (cap) {
+               return {
+                 type: this.options.sanitize ? 'paragraph' : 'html',
+                 raw: cap[0],
+                 pre: !this.options.sanitizer && (cap[1] === 'pre' || cap[1] === 'script' || cap[1] === 'style'),
+                 text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+               };
+             }
+           }
+         }, {
+           key: "def",
+           value: function def(src) {
+             var cap = this.rules.block.def.exec(src);
+
+             if (cap) {
+               if (cap[3]) cap[3] = cap[3].substring(1, cap[3].length - 1);
+               var tag = cap[1].toLowerCase().replace(/\s+/g, ' ');
+               return {
+                 type: 'def',
+                 tag: tag,
+                 raw: cap[0],
+                 href: cap[2],
+                 title: cap[3]
+               };
+             }
+           }
+         }, {
+           key: "table",
+           value: function table(src) {
+             var cap = this.rules.block.table.exec(src);
 
-           var k; // The member key.
+             if (cap) {
+               var item = {
+                 type: 'table',
+                 header: splitCells(cap[1].replace(/^ *| *\| *$/g, '')),
+                 align: cap[2].replace(/^ *|\| *$/g, '').split(/ *\| */),
+                 cells: cap[3] ? cap[3].replace(/\n$/, '').split('\n') : []
+               };
 
-           var v; // The member value.
+               if (item.header.length === item.align.length) {
+                 item.raw = cap[0];
+                 var l = item.align.length;
+                 var i;
 
-           var length;
-           var mind = gap;
-           var partial;
-           var value = holder[key]; // If the value has a toJSON method, call it to obtain a replacement value.
+                 for (i = 0; i < l; i++) {
+                   if (/^ *-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'right';
+                   } else if (/^ *:-+: *$/.test(item.align[i])) {
+                     item.align[i] = 'center';
+                   } else if (/^ *:-+ *$/.test(item.align[i])) {
+                     item.align[i] = 'left';
+                   } else {
+                     item.align[i] = null;
+                   }
+                 }
 
-           if (value && _typeof(value) === "object" && typeof value.toJSON === "function") {
-             value = value.toJSON(key);
-           } // If we were called with a replacer function, then call the replacer to
-           // obtain a replacement value.
+                 l = item.cells.length;
 
+                 for (i = 0; i < l; i++) {
+                   item.cells[i] = splitCells(item.cells[i].replace(/^ *\| *| *\| *$/g, ''), item.header.length);
+                 }
 
-           if (typeof rep === "function") {
-             value = rep.call(holder, key, value);
-           } // What happens next depends on the value's type.
+                 return item;
+               }
+             }
+           }
+         }, {
+           key: "lheading",
+           value: function lheading(src) {
+             var cap = this.rules.block.lheading.exec(src);
 
+             if (cap) {
+               return {
+                 type: 'heading',
+                 raw: cap[0],
+                 depth: cap[2].charAt(0) === '=' ? 1 : 2,
+                 text: cap[1]
+               };
+             }
+           }
+         }, {
+           key: "paragraph",
+           value: function paragraph(src) {
+             var cap = this.rules.block.paragraph.exec(src);
 
-           switch (_typeof(value)) {
-             case "string":
-               return quote(value);
+             if (cap) {
+               return {
+                 type: 'paragraph',
+                 raw: cap[0],
+                 text: cap[1].charAt(cap[1].length - 1) === '\n' ? cap[1].slice(0, -1) : cap[1]
+               };
+             }
+           }
+         }, {
+           key: "text",
+           value: function text(src) {
+             var cap = this.rules.block.text.exec(src);
 
-             case "number":
-               // JSON numbers must be finite. Encode non-finite numbers as null.
-               return isFinite(value) ? String(value) : "null";
+             if (cap) {
+               return {
+                 type: 'text',
+                 raw: cap[0],
+                 text: cap[0]
+               };
+             }
+           }
+         }, {
+           key: "escape",
+           value: function escape(src) {
+             var cap = this.rules.inline.escape.exec(src);
 
-             case "boolean":
-             case "null":
-               // If the value is a boolean or null, convert it to a string. Note:
-               // typeof null does not produce "null". The case is included here in
-               // the remote chance that this gets fixed someday.
-               return String(value);
-             // If the type is "object", we might be dealing with an object or an array or
-             // null.
+             if (cap) {
+               return {
+                 type: 'escape',
+                 raw: cap[0],
+                 text: _escape(cap[1])
+               };
+             }
+           }
+         }, {
+           key: "tag",
+           value: function tag(src, inLink, inRawBlock) {
+             var cap = this.rules.inline.tag.exec(src);
 
-             case "object":
-               // Due to a specification blunder in ECMAScript, typeof null is "object",
-               // so watch out for that case.
-               if (!value) {
-                 return "null";
-               } // Make an array to hold the partial results of stringifying this object value.
+             if (cap) {
+               if (!inLink && /^<a /i.test(cap[0])) {
+                 inLink = true;
+               } else if (inLink && /^<\/a>/i.test(cap[0])) {
+                 inLink = false;
+               }
 
+               if (!inRawBlock && /^<(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+                 inRawBlock = true;
+               } else if (inRawBlock && /^<\/(pre|code|kbd|script)(\s|>)/i.test(cap[0])) {
+                 inRawBlock = false;
+               }
 
-               gap += indent;
-               partial = []; // Is the value an array?
+               return {
+                 type: this.options.sanitize ? 'text' : 'html',
+                 raw: cap[0],
+                 inLink: inLink,
+                 inRawBlock: inRawBlock,
+                 text: this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0]
+               };
+             }
+           }
+         }, {
+           key: "link",
+           value: function link(src) {
+             var cap = this.rules.inline.link.exec(src);
 
-               if (Object.prototype.toString.apply(value) === "[object Array]") {
-                 // The value is an array. Stringify every element. Use null as a placeholder
-                 // for non-JSON values.
-                 length = value.length;
+             if (cap) {
+               var trimmedUrl = cap[2].trim();
 
-                 for (i = 0; i < length; i += 1) {
-                   partial[i] = str(i, value) || "null";
-                 } // Join all of the elements together, separated with commas, and wrap them in
-                 // brackets.
+               if (!this.options.pedantic && /^</.test(trimmedUrl)) {
+                 // commonmark requires matching angle brackets
+                 if (!/>$/.test(trimmedUrl)) {
+                   return;
+                 } // ending angle bracket cannot be escaped
 
 
-                 v = partial.length === 0 ? "[]" : gap ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]" : "[" + partial.join(",") + "]";
-                 gap = mind;
-                 return v;
-               } // If the replacer is an array, use it to select the members to be stringified.
+                 var rtrimSlash = rtrim(trimmedUrl.slice(0, -1), '\\');
 
+                 if ((trimmedUrl.length - rtrimSlash.length) % 2 === 0) {
+                   return;
+                 }
+               } else {
+                 // find closing parenthesis
+                 var lastParenIndex = findClosingBracket(cap[2], '()');
+
+                 if (lastParenIndex > -1) {
+                   var start = cap[0].indexOf('!') === 0 ? 5 : 4;
+                   var linkLen = start + cap[1].length + lastParenIndex;
+                   cap[2] = cap[2].substring(0, lastParenIndex);
+                   cap[0] = cap[0].substring(0, linkLen).trim();
+                   cap[3] = '';
+                 }
+               }
 
-               if (rep && _typeof(rep) === "object") {
-                 length = rep.length;
+               var href = cap[2];
+               var title = '';
 
-                 for (i = 0; i < length; i += 1) {
-                   if (typeof rep[i] === "string") {
-                     k = rep[i];
-                     v = str(k, value);
+               if (this.options.pedantic) {
+                 // split pedantic href and title
+                 var link = /^([^'"]*[^\s])\s+(['"])(.*)\2/.exec(href);
 
-                     if (v) {
-                       partial.push(quote(k) + (gap ? ": " : ":") + v);
-                     }
-                   }
+                 if (link) {
+                   href = link[1];
+                   title = link[3];
                  }
                } else {
-                 // Otherwise, iterate through all of the keys in the object.
-                 for (k in value) {
-                   if (Object.prototype.hasOwnProperty.call(value, k)) {
-                     v = str(k, value);
+                 title = cap[3] ? cap[3].slice(1, -1) : '';
+               }
 
-                     if (v) {
-                       partial.push(quote(k) + (gap ? ": " : ":") + v);
-                     }
-                   }
-                 }
-               } // Join all of the member texts together, separated with commas,
-               // and wrap them in braces.
+               href = href.trim();
 
+               if (/^</.test(href)) {
+                 if (this.options.pedantic && !/>$/.test(trimmedUrl)) {
+                   // pedantic allows starting angle bracket without ending angle bracket
+                   href = href.slice(1);
+                 } else {
+                   href = href.slice(1, -1);
+                 }
+               }
 
-               v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
-               gap = mind;
-               return v;
+               return outputLink(cap, {
+                 href: href ? href.replace(this.rules.inline._escapes, '$1') : href,
+                 title: title ? title.replace(this.rules.inline._escapes, '$1') : title
+               }, cap[0]);
+             }
            }
-         } // If the JSON object does not yet have a stringify method, give it one.
+         }, {
+           key: "reflink",
+           value: function reflink(src, links) {
+             var cap;
 
+             if ((cap = this.rules.inline.reflink.exec(src)) || (cap = this.rules.inline.nolink.exec(src))) {
+               var link = (cap[2] || cap[1]).replace(/\s+/g, ' ');
+               link = links[link.toLowerCase()];
 
-         if (typeof JSON.stringify !== "function") {
-           meta = {
-             // table of character substitutions
-             "\b": "\\b",
-             "\t": "\\t",
-             "\n": "\\n",
-             "\f": "\\f",
-             "\r": "\\r",
-             "\"": "\\\"",
-             "\\": "\\\\"
-           };
+               if (!link || !link.href) {
+                 var text = cap[0].charAt(0);
+                 return {
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 };
+               }
 
-           JSON.stringify = function (value, replacer, space) {
-             // The stringify method takes a value and an optional replacer, and an optional
-             // space parameter, and returns a JSON text. The replacer can be a function
-             // that can replace values, or an array of strings that will select the keys.
-             // A default replacer method can be provided. Use of the space parameter can
-             // produce text that is more easily readable.
-             var i;
-             gap = "";
-             indent = ""; // If the space parameter is a number, make an indent string containing that
-             // many spaces.
+               return outputLink(cap, link, cap[0]);
+             }
+           }
+         }, {
+           key: "emStrong",
+           value: function emStrong(src, maskedSrc) {
+             var prevChar = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
+             var match = this.rules.inline.emStrong.lDelim.exec(src);
+             if (!match) return; // _ can't be between two alphanumerics. \p{L}\p{N} includes non-english alphabet/numbers as well
 
-             if (typeof space === "number") {
-               for (i = 0; i < space; i += 1) {
-                 indent += " ";
-               } // If the space parameter is a string, it will be used as the indent string.
+             if (match[3] && prevChar.match(/(?:[0-9A-Za-z\xAA\xB2\xB3\xB5\xB9\xBA\xBC-\xBE\xC0-\xD6\xD8-\xF6\xF8-\u02C1\u02C6-\u02D1\u02E0-\u02E4\u02EC\u02EE\u0370-\u0374\u0376\u0377\u037A-\u037D\u037F\u0386\u0388-\u038A\u038C\u038E-\u03A1\u03A3-\u03F5\u03F7-\u0481\u048A-\u052F\u0531-\u0556\u0559\u0560-\u0588\u05D0-\u05EA\u05EF-\u05F2\u0620-\u064A\u0660-\u0669\u066E\u066F\u0671-\u06D3\u06D5\u06E5\u06E6\u06EE-\u06FC\u06FF\u0710\u0712-\u072F\u074D-\u07A5\u07B1\u07C0-\u07EA\u07F4\u07F5\u07FA\u0800-\u0815\u081A\u0824\u0828\u0840-\u0858\u0860-\u086A\u0870-\u0887\u0889-\u088E\u08A0-\u08C9\u0904-\u0939\u093D\u0950\u0958-\u0961\u0966-\u096F\u0971-\u0980\u0985-\u098C\u098F\u0990\u0993-\u09A8\u09AA-\u09B0\u09B2\u09B6-\u09B9\u09BD\u09CE\u09DC\u09DD\u09DF-\u09E1\u09E6-\u09F1\u09F4-\u09F9\u09FC\u0A05-\u0A0A\u0A0F\u0A10\u0A13-\u0A28\u0A2A-\u0A30\u0A32\u0A33\u0A35\u0A36\u0A38\u0A39\u0A59-\u0A5C\u0A5E\u0A66-\u0A6F\u0A72-\u0A74\u0A85-\u0A8D\u0A8F-\u0A91\u0A93-\u0AA8\u0AAA-\u0AB0\u0AB2\u0AB3\u0AB5-\u0AB9\u0ABD\u0AD0\u0AE0\u0AE1\u0AE6-\u0AEF\u0AF9\u0B05-\u0B0C\u0B0F\u0B10\u0B13-\u0B28\u0B2A-\u0B30\u0B32\u0B33\u0B35-\u0B39\u0B3D\u0B5C\u0B5D\u0B5F-\u0B61\u0B66-\u0B6F\u0B71-\u0B77\u0B83\u0B85-\u0B8A\u0B8E-\u0B90\u0B92-\u0B95\u0B99\u0B9A\u0B9C\u0B9E\u0B9F\u0BA3\u0BA4\u0BA8-\u0BAA\u0BAE-\u0BB9\u0BD0\u0BE6-\u0BF2\u0C05-\u0C0C\u0C0E-\u0C10\u0C12-\u0C28\u0C2A-\u0C39\u0C3D\u0C58-\u0C5A\u0C5D\u0C60\u0C61\u0C66-\u0C6F\u0C78-\u0C7E\u0C80\u0C85-\u0C8C\u0C8E-\u0C90\u0C92-\u0CA8\u0CAA-\u0CB3\u0CB5-\u0CB9\u0CBD\u0CDD\u0CDE\u0CE0\u0CE1\u0CE6-\u0CEF\u0CF1\u0CF2\u0D04-\u0D0C\u0D0E-\u0D10\u0D12-\u0D3A\u0D3D\u0D4E\u0D54-\u0D56\u0D58-\u0D61\u0D66-\u0D78\u0D7A-\u0D7F\u0D85-\u0D96\u0D9A-\u0DB1\u0DB3-\u0DBB\u0DBD\u0DC0-\u0DC6\u0DE6-\u0DEF\u0E01-\u0E30\u0E32\u0E33\u0E40-\u0E46\u0E50-\u0E59\u0E81\u0E82\u0E84\u0E86-\u0E8A\u0E8C-\u0EA3\u0EA5\u0EA7-\u0EB0\u0EB2\u0EB3\u0EBD\u0EC0-\u0EC4\u0EC6\u0ED0-\u0ED9\u0EDC-\u0EDF\u0F00\u0F20-\u0F33\u0F40-\u0F47\u0F49-\u0F6C\u0F88-\u0F8C\u1000-\u102A\u103F-\u1049\u1050-\u1055\u105A-\u105D\u1061\u1065\u1066\u106E-\u1070\u1075-\u1081\u108E\u1090-\u1099\u10A0-\u10C5\u10C7\u10CD\u10D0-\u10FA\u10FC-\u1248\u124A-\u124D\u1250-\u1256\u1258\u125A-\u125D\u1260-\u1288\u128A-\u128D\u1290-\u12B0\u12B2-\u12B5\u12B8-\u12BE\u12C0\u12C2-\u12C5\u12C8-\u12D6\u12D8-\u1310\u1312-\u1315\u1318-\u135A\u1369-\u137C\u1380-\u138F\u13A0-\u13F5\u13F8-\u13FD\u1401-\u166C\u166F-\u167F\u1681-\u169A\u16A0-\u16EA\u16EE-\u16F8\u1700-\u1711\u171F-\u1731\u1740-\u1751\u1760-\u176C\u176E-\u1770\u1780-\u17B3\u17D7\u17DC\u17E0-\u17E9\u17F0-\u17F9\u1810-\u1819\u1820-\u1878\u1880-\u1884\u1887-\u18A8\u18AA\u18B0-\u18F5\u1900-\u191E\u1946-\u196D\u1970-\u1974\u1980-\u19AB\u19B0-\u19C9\u19D0-\u19DA\u1A00-\u1A16\u1A20-\u1A54\u1A80-\u1A89\u1A90-\u1A99\u1AA7\u1B05-\u1B33\u1B45-\u1B4C\u1B50-\u1B59\u1B83-\u1BA0\u1BAE-\u1BE5\u1C00-\u1C23\u1C40-\u1C49\u1C4D-\u1C7D\u1C80-\u1C88\u1C90-\u1CBA\u1CBD-\u1CBF\u1CE9-\u1CEC\u1CEE-\u1CF3\u1CF5\u1CF6\u1CFA\u1D00-\u1DBF\u1E00-\u1F15\u1F18-\u1F1D\u1F20-\u1F45\u1F48-\u1F4D\u1F50-\u1F57\u1F59\u1F5B\u1F5D\u1F5F-\u1F7D\u1F80-\u1FB4\u1FB6-\u1FBC\u1FBE\u1FC2-\u1FC4\u1FC6-\u1FCC\u1FD0-\u1FD3\u1FD6-\u1FDB\u1FE0-\u1FEC\u1FF2-\u1FF4\u1FF6-\u1FFC\u2070\u2071\u2074-\u2079\u207F-\u2089\u2090-\u209C\u2102\u2107\u210A-\u2113\u2115\u2119-\u211D\u2124\u2126\u2128\u212A-\u212D\u212F-\u2139\u213C-\u213F\u2145-\u2149\u214E\u2150-\u2189\u2460-\u249B\u24EA-\u24FF\u2776-\u2793\u2C00-\u2CE4\u2CEB-\u2CEE\u2CF2\u2CF3\u2CFD\u2D00-\u2D25\u2D27\u2D2D\u2D30-\u2D67\u2D6F\u2D80-\u2D96\u2DA0-\u2DA6\u2DA8-\u2DAE\u2DB0-\u2DB6\u2DB8-\u2DBE\u2DC0-\u2DC6\u2DC8-\u2DCE\u2DD0-\u2DD6\u2DD8-\u2DDE\u2E2F\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303C\u3041-\u3096\u309D-\u309F\u30A1-\u30FA\u30FC-\u30FF\u3105-\u312F\u3131-\u318E\u3192-\u3195\u31A0-\u31BF\u31F0-\u31FF\u3220-\u3229\u3248-\u324F\u3251-\u325F\u3280-\u3289\u32B1-\u32BF\u3400-\u4DBF\u4E00-\uA48C\uA4D0-\uA4FD\uA500-\uA60C\uA610-\uA62B\uA640-\uA66E\uA67F-\uA69D\uA6A0-\uA6EF\uA717-\uA71F\uA722-\uA788\uA78B-\uA7CA\uA7D0\uA7D1\uA7D3\uA7D5-\uA7D9\uA7F2-\uA801\uA803-\uA805\uA807-\uA80A\uA80C-\uA822\uA830-\uA835\uA840-\uA873\uA882-\uA8B3\uA8D0-\uA8D9\uA8F2-\uA8F7\uA8FB\uA8FD\uA8FE\uA900-\uA925\uA930-\uA946\uA960-\uA97C\uA984-\uA9B2\uA9CF-\uA9D9\uA9E0-\uA9E4\uA9E6-\uA9FE\uAA00-\uAA28\uAA40-\uAA42\uAA44-\uAA4B\uAA50-\uAA59\uAA60-\uAA76\uAA7A\uAA7E-\uAAAF\uAAB1\uAAB5\uAAB6\uAAB9-\uAABD\uAAC0\uAAC2\uAADB-\uAADD\uAAE0-\uAAEA\uAAF2-\uAAF4\uAB01-\uAB06\uAB09-\uAB0E\uAB11-\uAB16\uAB20-\uAB26\uAB28-\uAB2E\uAB30-\uAB5A\uAB5C-\uAB69\uAB70-\uABE2\uABF0-\uABF9\uAC00-\uD7A3\uD7B0-\uD7C6\uD7CB-\uD7FB\uF900-\uFA6D\uFA70-\uFAD9\uFB00-\uFB06\uFB13-\uFB17\uFB1D\uFB1F-\uFB28\uFB2A-\uFB36\uFB38-\uFB3C\uFB3E\uFB40\uFB41\uFB43\uFB44\uFB46-\uFBB1\uFBD3-\uFD3D\uFD50-\uFD8F\uFD92-\uFDC7\uFDF0-\uFDFB\uFE70-\uFE74\uFE76-\uFEFC\uFF10-\uFF19\uFF21-\uFF3A\uFF41-\uFF5A\uFF66-\uFFBE\uFFC2-\uFFC7\uFFCA-\uFFCF\uFFD2-\uFFD7\uFFDA-\uFFDC]|\uD800[\uDC00-\uDC0B\uDC0D-\uDC26\uDC28-\uDC3A\uDC3C\uDC3D\uDC3F-\uDC4D\uDC50-\uDC5D\uDC80-\uDCFA\uDD07-\uDD33\uDD40-\uDD78\uDD8A\uDD8B\uDE80-\uDE9C\uDEA0-\uDED0\uDEE1-\uDEFB\uDF00-\uDF23\uDF2D-\uDF4A\uDF50-\uDF75\uDF80-\uDF9D\uDFA0-\uDFC3\uDFC8-\uDFCF\uDFD1-\uDFD5]|\uD801[\uDC00-\uDC9D\uDCA0-\uDCA9\uDCB0-\uDCD3\uDCD8-\uDCFB\uDD00-\uDD27\uDD30-\uDD63\uDD70-\uDD7A\uDD7C-\uDD8A\uDD8C-\uDD92\uDD94\uDD95\uDD97-\uDDA1\uDDA3-\uDDB1\uDDB3-\uDDB9\uDDBB\uDDBC\uDE00-\uDF36\uDF40-\uDF55\uDF60-\uDF67\uDF80-\uDF85\uDF87-\uDFB0\uDFB2-\uDFBA]|\uD802[\uDC00-\uDC05\uDC08\uDC0A-\uDC35\uDC37\uDC38\uDC3C\uDC3F-\uDC55\uDC58-\uDC76\uDC79-\uDC9E\uDCA7-\uDCAF\uDCE0-\uDCF2\uDCF4\uDCF5\uDCFB-\uDD1B\uDD20-\uDD39\uDD80-\uDDB7\uDDBC-\uDDCF\uDDD2-\uDE00\uDE10-\uDE13\uDE15-\uDE17\uDE19-\uDE35\uDE40-\uDE48\uDE60-\uDE7E\uDE80-\uDE9F\uDEC0-\uDEC7\uDEC9-\uDEE4\uDEEB-\uDEEF\uDF00-\uDF35\uDF40-\uDF55\uDF58-\uDF72\uDF78-\uDF91\uDFA9-\uDFAF]|\uD803[\uDC00-\uDC48\uDC80-\uDCB2\uDCC0-\uDCF2\uDCFA-\uDD23\uDD30-\uDD39\uDE60-\uDE7E\uDE80-\uDEA9\uDEB0\uDEB1\uDF00-\uDF27\uDF30-\uDF45\uDF51-\uDF54\uDF70-\uDF81\uDFB0-\uDFCB\uDFE0-\uDFF6]|\uD804[\uDC03-\uDC37\uDC52-\uDC6F\uDC71\uDC72\uDC75\uDC83-\uDCAF\uDCD0-\uDCE8\uDCF0-\uDCF9\uDD03-\uDD26\uDD36-\uDD3F\uDD44\uDD47\uDD50-\uDD72\uDD76\uDD83-\uDDB2\uDDC1-\uDDC4\uDDD0-\uDDDA\uDDDC\uDDE1-\uDDF4\uDE00-\uDE11\uDE13-\uDE2B\uDE80-\uDE86\uDE88\uDE8A-\uDE8D\uDE8F-\uDE9D\uDE9F-\uDEA8\uDEB0-\uDEDE\uDEF0-\uDEF9\uDF05-\uDF0C\uDF0F\uDF10\uDF13-\uDF28\uDF2A-\uDF30\uDF32\uDF33\uDF35-\uDF39\uDF3D\uDF50\uDF5D-\uDF61]|\uD805[\uDC00-\uDC34\uDC47-\uDC4A\uDC50-\uDC59\uDC5F-\uDC61\uDC80-\uDCAF\uDCC4\uDCC5\uDCC7\uDCD0-\uDCD9\uDD80-\uDDAE\uDDD8-\uDDDB\uDE00-\uDE2F\uDE44\uDE50-\uDE59\uDE80-\uDEAA\uDEB8\uDEC0-\uDEC9\uDF00-\uDF1A\uDF30-\uDF3B\uDF40-\uDF46]|\uD806[\uDC00-\uDC2B\uDCA0-\uDCF2\uDCFF-\uDD06\uDD09\uDD0C-\uDD13\uDD15\uDD16\uDD18-\uDD2F\uDD3F\uDD41\uDD50-\uDD59\uDDA0-\uDDA7\uDDAA-\uDDD0\uDDE1\uDDE3\uDE00\uDE0B-\uDE32\uDE3A\uDE50\uDE5C-\uDE89\uDE9D\uDEB0-\uDEF8]|\uD807[\uDC00-\uDC08\uDC0A-\uDC2E\uDC40\uDC50-\uDC6C\uDC72-\uDC8F\uDD00-\uDD06\uDD08\uDD09\uDD0B-\uDD30\uDD46\uDD50-\uDD59\uDD60-\uDD65\uDD67\uDD68\uDD6A-\uDD89\uDD98\uDDA0-\uDDA9\uDEE0-\uDEF2\uDFB0\uDFC0-\uDFD4]|\uD808[\uDC00-\uDF99]|\uD809[\uDC00-\uDC6E\uDC80-\uDD43]|\uD80B[\uDF90-\uDFF0]|[\uD80C\uD81C-\uD820\uD822\uD840-\uD868\uD86A-\uD86C\uD86F-\uD872\uD874-\uD879\uD880-\uD883][\uDC00-\uDFFF]|\uD80D[\uDC00-\uDC2E]|\uD811[\uDC00-\uDE46]|\uD81A[\uDC00-\uDE38\uDE40-\uDE5E\uDE60-\uDE69\uDE70-\uDEBE\uDEC0-\uDEC9\uDED0-\uDEED\uDF00-\uDF2F\uDF40-\uDF43\uDF50-\uDF59\uDF5B-\uDF61\uDF63-\uDF77\uDF7D-\uDF8F]|\uD81B[\uDE40-\uDE96\uDF00-\uDF4A\uDF50\uDF93-\uDF9F\uDFE0\uDFE1\uDFE3]|\uD821[\uDC00-\uDFF7]|\uD823[\uDC00-\uDCD5\uDD00-\uDD08]|\uD82B[\uDFF0-\uDFF3\uDFF5-\uDFFB\uDFFD\uDFFE]|\uD82C[\uDC00-\uDD22\uDD50-\uDD52\uDD64-\uDD67\uDD70-\uDEFB]|\uD82F[\uDC00-\uDC6A\uDC70-\uDC7C\uDC80-\uDC88\uDC90-\uDC99]|\uD834[\uDEE0-\uDEF3\uDF60-\uDF78]|\uD835[\uDC00-\uDC54\uDC56-\uDC9C\uDC9E\uDC9F\uDCA2\uDCA5\uDCA6\uDCA9-\uDCAC\uDCAE-\uDCB9\uDCBB\uDCBD-\uDCC3\uDCC5-\uDD05\uDD07-\uDD0A\uDD0D-\uDD14\uDD16-\uDD1C\uDD1E-\uDD39\uDD3B-\uDD3E\uDD40-\uDD44\uDD46\uDD4A-\uDD50\uDD52-\uDEA5\uDEA8-\uDEC0\uDEC2-\uDEDA\uDEDC-\uDEFA\uDEFC-\uDF14\uDF16-\uDF34\uDF36-\uDF4E\uDF50-\uDF6E\uDF70-\uDF88\uDF8A-\uDFA8\uDFAA-\uDFC2\uDFC4-\uDFCB\uDFCE-\uDFFF]|\uD837[\uDF00-\uDF1E]|\uD838[\uDD00-\uDD2C\uDD37-\uDD3D\uDD40-\uDD49\uDD4E\uDE90-\uDEAD\uDEC0-\uDEEB\uDEF0-\uDEF9]|\uD839[\uDFE0-\uDFE6\uDFE8-\uDFEB\uDFED\uDFEE\uDFF0-\uDFFE]|\uD83A[\uDC00-\uDCC4\uDCC7-\uDCCF\uDD00-\uDD43\uDD4B\uDD50-\uDD59]|\uD83B[\uDC71-\uDCAB\uDCAD-\uDCAF\uDCB1-\uDCB4\uDD01-\uDD2D\uDD2F-\uDD3D\uDE00-\uDE03\uDE05-\uDE1F\uDE21\uDE22\uDE24\uDE27\uDE29-\uDE32\uDE34-\uDE37\uDE39\uDE3B\uDE42\uDE47\uDE49\uDE4B\uDE4D-\uDE4F\uDE51\uDE52\uDE54\uDE57\uDE59\uDE5B\uDE5D\uDE5F\uDE61\uDE62\uDE64\uDE67-\uDE6A\uDE6C-\uDE72\uDE74-\uDE77\uDE79-\uDE7C\uDE7E\uDE80-\uDE89\uDE8B-\uDE9B\uDEA1-\uDEA3\uDEA5-\uDEA9\uDEAB-\uDEBB]|\uD83C[\uDD00-\uDD0C]|\uD83E[\uDFF0-\uDFF9]|\uD869[\uDC00-\uDEDF\uDF00-\uDFFF]|\uD86D[\uDC00-\uDF38\uDF40-\uDFFF]|\uD86E[\uDC00-\uDC1D\uDC20-\uDFFF]|\uD873[\uDC00-\uDEA1\uDEB0-\uDFFF]|\uD87A[\uDC00-\uDFE0]|\uD87E[\uDC00-\uDE1D]|\uD884[\uDC00-\uDF4A])/)) return;
+             var nextChar = match[1] || match[2] || '';
 
-             } else if (typeof space === "string") {
-               indent = space;
-             } // If there is a replacer, it must be a function or an array.
-             // Otherwise, throw an error.
+             if (!nextChar || nextChar && (prevChar === '' || this.rules.inline.punctuation.exec(prevChar))) {
+               var lLength = match[0].length - 1;
+               var rDelim,
+                   rLength,
+                   delimTotal = lLength,
+                   midDelimTotal = 0;
+               var endReg = match[0][0] === '*' ? this.rules.inline.emStrong.rDelimAst : this.rules.inline.emStrong.rDelimUnd;
+               endReg.lastIndex = 0; // Clip maskedSrc to same section of string as src (move to lexer?)
 
+               maskedSrc = maskedSrc.slice(-1 * src.length + lLength);
 
-             rep = replacer;
+               while ((match = endReg.exec(maskedSrc)) != null) {
+                 rDelim = match[1] || match[2] || match[3] || match[4] || match[5] || match[6];
+                 if (!rDelim) continue; // skip single * in __abc*abc__
 
-             if (replacer && typeof replacer !== "function" && (_typeof(replacer) !== "object" || typeof replacer.length !== "number")) {
-               throw new Error("JSON.stringify");
-             } // Make a fake root object containing our value under the key of "".
-             // Return the result of stringifying the value.
+                 rLength = rDelim.length;
 
+                 if (match[3] || match[4]) {
+                   // found another Left Delim
+                   delimTotal += rLength;
+                   continue;
+                 } else if (match[5] || match[6]) {
+                   // either Left or Right Delim
+                   if (lLength % 3 && !((lLength + rLength) % 3)) {
+                     midDelimTotal += rLength;
+                     continue; // CommonMark Emphasis Rules 9-10
+                   }
+                 }
 
-             return str("", {
-               "": value
-             });
-           };
-         } // If the JSON object does not yet have a parse method, give it one.
+                 delimTotal -= rLength;
+                 if (delimTotal > 0) continue; // Haven't found enough closing delimiters
+                 // Remove extra characters. *a*** -> *a*
 
+                 rLength = Math.min(rLength, rLength + delimTotal + midDelimTotal); // Create `em` if smallest delimiter has odd char count. *a***
 
-         if (typeof JSON.parse !== "function") {
-           JSON.parse = function (text, reviver) {
-             // The parse method takes a text and an optional reviver function, and returns
-             // a JavaScript value if the text is a valid JSON text.
-             var j;
+                 if (Math.min(lLength, rLength) % 2) {
+                   return {
+                     type: 'em',
+                     raw: src.slice(0, lLength + match.index + rLength + 1),
+                     text: src.slice(1, lLength + match.index + rLength)
+                   };
+                 } // Create 'strong' if smallest delimiter has even char count. **a***
 
-             function walk(holder, key) {
-               // The walk method is used to recursively walk the resulting structure so
-               // that modifications can be made.
-               var k;
-               var v;
-               var value = holder[key];
 
-               if (value && _typeof(value) === "object") {
-                 for (k in value) {
-                   if (Object.prototype.hasOwnProperty.call(value, k)) {
-                     v = walk(value, k);
+                 return {
+                   type: 'strong',
+                   raw: src.slice(0, lLength + match.index + rLength + 1),
+                   text: src.slice(2, lLength + match.index + rLength - 1)
+                 };
+               }
+             }
+           }
+         }, {
+           key: "codespan",
+           value: function codespan(src) {
+             var cap = this.rules.inline.code.exec(src);
 
-                     if (v !== undefined) {
-                       value[k] = v;
-                     } else {
-                       delete value[k];
-                     }
-                   }
-                 }
+             if (cap) {
+               var text = cap[2].replace(/\n/g, ' ');
+               var hasNonSpaceChars = /[^ ]/.test(text);
+               var hasSpaceCharsOnBothEnds = /^ /.test(text) && / $/.test(text);
+
+               if (hasNonSpaceChars && hasSpaceCharsOnBothEnds) {
+                 text = text.substring(1, text.length - 1);
                }
 
-               return reviver.call(holder, key, value);
-             } // Parsing happens in four stages. In the first stage, we replace certain
-             // Unicode characters with escape sequences. JavaScript handles many characters
-             // incorrectly, either silently deleting them, or treating them as line endings.
+               text = _escape(text, true);
+               return {
+                 type: 'codespan',
+                 raw: cap[0],
+                 text: text
+               };
+             }
+           }
+         }, {
+           key: "br",
+           value: function br(src) {
+             var cap = this.rules.inline.br.exec(src);
 
+             if (cap) {
+               return {
+                 type: 'br',
+                 raw: cap[0]
+               };
+             }
+           }
+         }, {
+           key: "del",
+           value: function del(src) {
+             var cap = this.rules.inline.del.exec(src);
 
-             text = String(text);
-             rx_dangerous.lastIndex = 0;
+             if (cap) {
+               return {
+                 type: 'del',
+                 raw: cap[0],
+                 text: cap[2]
+               };
+             }
+           }
+         }, {
+           key: "autolink",
+           value: function autolink(src, mangle) {
+             var cap = this.rules.inline.autolink.exec(src);
 
-             if (rx_dangerous.test(text)) {
-               text = text.replace(rx_dangerous, function (a) {
-                 return "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
-               });
-             } // In the second stage, we run the text against regular expressions that look
-             // for non-JSON patterns. We are especially concerned with "()" and "new"
-             // because they can cause invocation, and "=" because it can cause mutation.
-             // But just to be safe, we want to reject all unexpected forms.
-             // We split the second stage into 4 regexp operations in order to work around
-             // crippling inefficiencies in IE's and Safari's regexp engines. First we
-             // replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
-             // replace all simple value tokens with "]" characters. Third, we delete all
-             // open brackets that follow a colon or comma or that begin the text. Finally,
-             // we look to see that the remaining characters are only whitespace or "]" or
-             // "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
+             if (cap) {
+               var text, href;
 
+               if (cap[2] === '@') {
+                 text = _escape(this.options.mangle ? mangle(cap[1]) : cap[1]);
+                 href = 'mailto:' + text;
+               } else {
+                 text = _escape(cap[1]);
+                 href = text;
+               }
 
-             if (rx_one.test(text.replace(rx_two, "@").replace(rx_three, "]").replace(rx_four, ""))) {
-               // In the third stage we use the eval function to compile the text into a
-               // JavaScript structure. The "{" operator is subject to a syntactic ambiguity
-               // in JavaScript: it can begin a block or an object literal. We wrap the text
-               // in parens to eliminate the ambiguity.
-               j = eval("(" + text + ")"); // In the optional fourth stage, we recursively walk the new structure, passing
-               // each name/value pair to a reviver function for possible transformation.
+               return {
+                 type: 'link',
+                 raw: cap[0],
+                 text: text,
+                 href: href,
+                 tokens: [{
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 }]
+               };
+             }
+           }
+         }, {
+           key: "url",
+           value: function url(src, mangle) {
+             var cap;
 
-               return typeof reviver === "function" ? walk({
-                 "": j
-               }, "") : j;
-             } // If the text is not JSON parseable, then a SyntaxError is thrown.
+             if (cap = this.rules.inline.url.exec(src)) {
+               var text, href;
 
+               if (cap[2] === '@') {
+                 text = _escape(this.options.mangle ? mangle(cap[0]) : cap[0]);
+                 href = 'mailto:' + text;
+               } else {
+                 // do extended autolink path validation
+                 var prevCapZero;
 
-             throw new SyntaxError("JSON.parse");
-           };
-         }
-       })();
+                 do {
+                   prevCapZero = cap[0];
+                   cap[0] = this.rules.inline._backpedal.exec(cap[0])[0];
+                 } while (prevCapZero !== cap[0]);
 
-       var json2 = json2Plugin;
+                 text = _escape(cap[0]);
 
-       function json2Plugin() {
-         return {};
-       }
+                 if (cap[1] === 'www.') {
+                   href = 'http://' + text;
+                 } else {
+                   href = text;
+                 }
+               }
 
-       var plugins = [json2];
-       var store_legacy = storeEngine.createStore(all, plugins);
+               return {
+                 type: 'link',
+                 raw: cap[0],
+                 text: text,
+                 href: href,
+                 tokens: [{
+                   type: 'text',
+                   raw: text,
+                   text: text
+                 }]
+               };
+             }
+           }
+         }, {
+           key: "inlineText",
+           value: function inlineText(src, inRawBlock, smartypants) {
+             var cap = this.rules.inline.text.exec(src);
 
-       //
-       // This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
-       // object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
-       // does not support custom headers, which this uses everywhere.
+             if (cap) {
+               var text;
 
+               if (inRawBlock) {
+                 text = this.options.sanitize ? this.options.sanitizer ? this.options.sanitizer(cap[0]) : _escape(cap[0]) : cap[0];
+               } else {
+                 text = _escape(this.options.smartypants ? smartypants(cap[0]) : cap[0]);
+               }
 
-       var osmAuth = function osmAuth(o) {
-         var oauth = {}; // authenticated users will also have a request token secret, but it's
-         // not used in transactions with the server
+               return {
+                 type: 'text',
+                 raw: cap[0],
+                 text: text
+               };
+             }
+           }
+         }]);
 
-         oauth.authenticated = function () {
-           return !!(token('oauth_token') && token('oauth_token_secret'));
-         };
+         return Tokenizer;
+       }();
 
-         oauth.logout = function () {
-           token('oauth_token', '');
-           token('oauth_token_secret', '');
-           token('oauth_request_token_secret', '');
-           return oauth;
-         }; // TODO: detect lack of click event
+       var noopTest = helpers.noopTest,
+           edit = helpers.edit,
+           merge$1 = helpers.merge;
+       /**
+        * Block-Level Grammar
+        */
+
+       var block$1 = {
+         newline: /^(?: *(?:\n|$))+/,
+         code: /^( {4}[^\n]+(?:\n(?: *(?:\n|$))*)?)+/,
+         fences: /^ {0,3}(`{3,}(?=[^`\n]*\n)|~{3,})([^\n]*)\n(?:|([\s\S]*?)\n)(?: {0,3}\1[~`]* *(?:\n+|$)|$)/,
+         hr: /^ {0,3}((?:- *){3,}|(?:_ *){3,}|(?:\* *){3,})(?:\n+|$)/,
+         heading: /^ {0,3}(#{1,6})(?=\s|$)(.*)(?:\n+|$)/,
+         blockquote: /^( {0,3}> ?(paragraph|[^\n]*)(?:\n|$))+/,
+         list: /^( {0,3})(bull) [\s\S]+?(?:hr|def|\n{2,}(?! )(?! {0,3}bull )\n*|\s*$)/,
+         html: '^ {0,3}(?:' // optional indentation
+         + '<(script|pre|style)[\\s>][\\s\\S]*?(?:</\\1>[^\\n]*\\n+|$)' // (1)
+         + '|comment[^\\n]*(\\n+|$)' // (2)
+         + '|<\\?[\\s\\S]*?(?:\\?>\\n*|$)' // (3)
+         + '|<![A-Z][\\s\\S]*?(?:>\\n*|$)' // (4)
+         + '|<!\\[CDATA\\[[\\s\\S]*?(?:\\]\\]>\\n*|$)' // (5)
+         + '|</?(tag)(?: +|\\n|/?>)[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (6)
+         + '|<(?!script|pre|style)([a-z][\\w-]*)(?:attribute)*? */?>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) open tag
+         + '|</(?!script|pre|style)[a-z][\\w-]*\\s*>(?=[ \\t]*(?:\\n|$))[\\s\\S]*?(?:(?:\\n *)+\\n|$)' // (7) closing tag
+         + ')',
+         def: /^ {0,3}\[(label)\]: *\n? *<?([^\s>]+)>?(?:(?: +\n? *| *\n *)(title))? *(?:\n+|$)/,
+         nptable: noopTest,
+         table: noopTest,
+         lheading: /^([^\n]+)\n {0,3}(=+|-+) *(?:\n+|$)/,
+         // regex template, placeholders will be replaced according to different paragraph
+         // interruption rules of commonmark and the original markdown spec:
+         _paragraph: /^([^\n]+(?:\n(?!hr|heading|lheading|blockquote|fences|list|html| +\n)[^\n]+)*)/,
+         text: /^[^\n]+/
+       };
+       block$1._label = /(?!\s*\])(?:\\[\[\]]|[^\[\]])+/;
+       block$1._title = /(?:"(?:\\"?|[^"\\])*"|'[^'\n]*(?:\n[^'\n]+)*\n?'|\([^()]*\))/;
+       block$1.def = edit(block$1.def).replace('label', block$1._label).replace('title', block$1._title).getRegex();
+       block$1.bullet = /(?:[*+-]|\d{1,9}[.)])/;
+       block$1.item = /^( *)(bull) ?[^\n]*(?:\n(?! *bull ?)[^\n]*)*/;
+       block$1.item = edit(block$1.item, 'gm').replace(/bull/g, block$1.bullet).getRegex();
+       block$1.listItemStart = edit(/^( *)(bull) */).replace('bull', block$1.bullet).getRegex();
+       block$1.list = edit(block$1.list).replace(/bull/g, block$1.bullet).replace('hr', '\\n+(?=\\1?(?:(?:- *){3,}|(?:_ *){3,}|(?:\\* *){3,})(?:\\n+|$))').replace('def', '\\n+(?=' + block$1.def.source + ')').getRegex();
+       block$1._tag = 'address|article|aside|base|basefont|blockquote|body|caption' + '|center|col|colgroup|dd|details|dialog|dir|div|dl|dt|fieldset|figcaption' + '|figure|footer|form|frame|frameset|h[1-6]|head|header|hr|html|iframe' + '|legend|li|link|main|menu|menuitem|meta|nav|noframes|ol|optgroup|option' + '|p|param|section|source|summary|table|tbody|td|tfoot|th|thead|title|tr' + '|track|ul';
+       block$1._comment = /<!--(?!-?>)[\s\S]*?(?:-->|$)/;
+       block$1.html = edit(block$1.html, 'i').replace('comment', block$1._comment).replace('tag', block$1._tag).replace('attribute', / +[a-zA-Z:_][\w.:-]*(?: *= *"[^"\n]*"| *= *'[^'\n]*'| *= *[^\s"'=<>`]+)?/).getRegex();
+       block$1.paragraph = edit(block$1._paragraph).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('|lheading', '') // setex headings don't interrupt commonmark paragraphs
+       .replace('blockquote', ' {0,3}>').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+       .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // pars can be interrupted by type (6) html blocks
+       .getRegex();
+       block$1.blockquote = edit(block$1.blockquote).replace('paragraph', block$1.paragraph).getRegex();
+       /**
+        * Normal Block Grammar
+        */
+
+       block$1.normal = merge$1({}, block$1);
+       /**
+        * GFM Block Grammar
+        */
+
+       block$1.gfm = merge$1({}, block$1.normal, {
+         nptable: '^ *([^|\\n ].*\\|.*)\\n' // Header
+         + ' {0,3}([-:]+ *\\|[-| :]*)' // Align
+         + '(?:\\n((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)',
+         // Cells
+         table: '^ *\\|(.+)\\n' // Header
+         + ' {0,3}\\|?( *[-:]+[-| :]*)' // Align
+         + '(?:\\n *((?:(?!\\n|hr|heading|blockquote|code|fences|list|html).*(?:\\n|$))*)\\n*|$)' // Cells
 
+       });
+       block$1.gfm.nptable = edit(block$1.gfm.nptable).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+       .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
+       .getRegex();
+       block$1.gfm.table = edit(block$1.gfm.table).replace('hr', block$1.hr).replace('heading', ' {0,3}#{1,6} ').replace('blockquote', ' {0,3}>').replace('code', ' {4}[^\\n]').replace('fences', ' {0,3}(?:`{3,}(?=[^`\\n]*\\n)|~{3,})[^\\n]*\\n').replace('list', ' {0,3}(?:[*+-]|1[.)]) ') // only lists starting from 1 can interrupt
+       .replace('html', '</?(?:tag)(?: +|\\n|/?>)|<(?:script|pre|style|!--)').replace('tag', block$1._tag) // tables can be interrupted by type (6) html blocks
+       .getRegex();
+       /**
+        * Pedantic grammar (original John Gruber's loose markdown specification)
+        */
 
-         oauth.authenticate = function (callback) {
-           if (oauth.authenticated()) return callback();
-           oauth.logout(); // ## Getting a request token
+       block$1.pedantic = merge$1({}, block$1.normal, {
+         html: edit('^ *(?:comment *(?:\\n|\\s*$)' + '|<(tag)[\\s\\S]+?</\\1> *(?:\\n{2,}|\\s*$)' // closed tag
+         + '|<tag(?:"[^"]*"|\'[^\']*\'|\\s[^\'"/>\\s]*)*?/?> *(?:\\n{2,}|\\s*$))').replace('comment', block$1._comment).replace(/tag/g, '(?!(?:' + 'a|em|strong|small|s|cite|q|dfn|abbr|data|time|code|var|samp|kbd|sub' + '|sup|i|b|u|mark|ruby|rt|rp|bdi|bdo|span|br|wbr|ins|del|img)' + '\\b)\\w+(?!:|[^\\w\\s@]*@)\\b').getRegex(),
+         def: /^ *\[([^\]]+)\]: *<?([^\s>]+)>?(?: +(["(][^\n]+[")]))? *(?:\n+|$)/,
+         heading: /^(#{1,6})(.*)(?:\n+|$)/,
+         fences: noopTest,
+         // fences not supported
+         paragraph: edit(block$1.normal._paragraph).replace('hr', block$1.hr).replace('heading', ' *#{1,6} *[^\n]').replace('lheading', block$1.lheading).replace('blockquote', ' {0,3}>').replace('|fences', '').replace('|list', '').replace('|html', '').getRegex()
+       });
+       /**
+        * Inline-Level Grammar
+        */
 
-           var params = timenonce(getAuth(o)),
-               url = o.url + '/oauth/request_token';
-           params.oauth_signature = ohauth_1.signature(o.oauth_secret, '', ohauth_1.baseString('POST', url, params));
+       var inline$1 = {
+         escape: /^\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/,
+         autolink: /^<(scheme:[^\s\x00-\x1f<>]*|email)>/,
+         url: noopTest,
+         tag: '^comment' + '|^</[a-zA-Z][\\w:-]*\\s*>' // self-closing tag
+         + '|^<[a-zA-Z][\\w-]*(?:attribute)*?\\s*/?>' // open tag
+         + '|^<\\?[\\s\\S]*?\\?>' // processing instruction, e.g. <?php ?>
+         + '|^<![a-zA-Z]+\\s[\\s\\S]*?>' // declaration, e.g. <!DOCTYPE html>
+         + '|^<!\\[CDATA\\[[\\s\\S]*?\\]\\]>',
+         // CDATA section
+         link: /^!?\[(label)\]\(\s*(href)(?:\s+(title))?\s*\)/,
+         reflink: /^!?\[(label)\]\[(?!\s*\])((?:\\[\[\]]?|[^\[\]\\])+)\]/,
+         nolink: /^!?\[(?!\s*\])((?:\[[^\[\]]*\]|\\[\[\]]|[^\[\]])*)\](?:\[\])?/,
+         reflinkSearch: 'reflink|nolink(?!\\()',
+         emStrong: {
+           lDelim: /^(?:\*+(?:([punct_])|[^\s*]))|^_+(?:([punct*])|([^\s_]))/,
+           //        (1) and (2) can only be a Right Delimiter. (3) and (4) can only be Left.  (5) and (6) can be either Left or Right.
+           //        () Skip other delimiter (1) #***                   (2) a***#, a***                   (3) #***a, ***a                 (4) ***#              (5) #***#                 (6) a***a
+           rDelimAst: /\_\_[^_*]*?\*[^_*]*?\_\_|[punct_](\*+)(?=[\s]|$)|[^punct*_\s](\*+)(?=[punct_\s]|$)|[punct_\s](\*+)(?=[^punct*_\s])|[\s](\*+)(?=[punct_])|[punct_](\*+)(?=[punct_])|[^punct*_\s](\*+)(?=[^punct*_\s])/,
+           rDelimUnd: /\*\*[^_*]*?\_[^_*]*?\*\*|[punct*](\_+)(?=[\s]|$)|[^punct*_\s](\_+)(?=[punct*\s]|$)|[punct*\s](\_+)(?=[^punct*_\s])|[\s](\_+)(?=[punct*])|[punct*](\_+)(?=[punct*])/ // ^- Not allowed for _
 
-           if (!o.singlepage) {
-             // Create a 600x550 popup window in the center of the screen
-             var w = 600,
-                 h = 550,
-                 settings = [['width', w], ['height', h], ['left', screen.width / 2 - w / 2], ['top', screen.height / 2 - h / 2]].map(function (x) {
-               return x.join('=');
-             }).join(','),
-                 popup = window.open('about:blank', 'oauth_window', settings);
-             oauth.popupWindow = popup;
+         },
+         code: /^(`+)([^`]|[^`][\s\S]*?[^`])\1(?!`)/,
+         br: /^( {2,}|\\)\n(?!\s*$)/,
+         del: noopTest,
+         text: /^(`+|[^`])(?:(?= {2,}\n)|[\s\S]*?(?:(?=[\\<!\[`*_]|\b_|$)|[^ ](?= {2,}\n)))/,
+         punctuation: /^([\spunctuation])/
+       }; // list of punctuation marks from CommonMark spec
+       // without * and _ to handle the different emphasis markers * and _
+
+       inline$1._punctuation = '!"#$%&\'()+\\-.,/:;<=>?@\\[\\]`^{|}~';
+       inline$1.punctuation = edit(inline$1.punctuation).replace(/punctuation/g, inline$1._punctuation).getRegex(); // sequences em should skip over [title](link), `code`, <html>
+
+       inline$1.blockSkip = /\[[^\]]*?\]\([^\)]*?\)|`[^`]*?`|<[^>]*?>/g;
+       inline$1.escapedEmSt = /\\\*|\\_/g;
+       inline$1._comment = edit(block$1._comment).replace('(?:-->|$)', '-->').getRegex();
+       inline$1.emStrong.lDelim = edit(inline$1.emStrong.lDelim).replace(/punct/g, inline$1._punctuation).getRegex();
+       inline$1.emStrong.rDelimAst = edit(inline$1.emStrong.rDelimAst, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
+       inline$1.emStrong.rDelimUnd = edit(inline$1.emStrong.rDelimUnd, 'g').replace(/punct/g, inline$1._punctuation).getRegex();
+       inline$1._escapes = /\\([!"#$%&'()*+,\-./:;<=>?@\[\]\\^_`{|}~])/g;
+       inline$1._scheme = /[a-zA-Z][a-zA-Z0-9+.-]{1,31}/;
+       inline$1._email = /[a-zA-Z0-9.!#$%&'*+/=?^_`{|}~-]+(@)[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?(?:\.[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?)+(?![-_])/;
+       inline$1.autolink = edit(inline$1.autolink).replace('scheme', inline$1._scheme).replace('email', inline$1._email).getRegex();
+       inline$1._attribute = /\s+[a-zA-Z:_][\w.:-]*(?:\s*=\s*"[^"]*"|\s*=\s*'[^']*'|\s*=\s*[^\s"'=<>`]+)?/;
+       inline$1.tag = edit(inline$1.tag).replace('comment', inline$1._comment).replace('attribute', inline$1._attribute).getRegex();
+       inline$1._label = /(?:\[(?:\\.|[^\[\]\\])*\]|\\.|`[^`]*`|[^\[\]\\`])*?/;
+       inline$1._href = /<(?:\\.|[^\n<>\\])+>|[^\s\x00-\x1f]*/;
+       inline$1._title = /"(?:\\"?|[^"\\])*"|'(?:\\'?|[^'\\])*'|\((?:\\\)?|[^)\\])*\)/;
+       inline$1.link = edit(inline$1.link).replace('label', inline$1._label).replace('href', inline$1._href).replace('title', inline$1._title).getRegex();
+       inline$1.reflink = edit(inline$1.reflink).replace('label', inline$1._label).getRegex();
+       inline$1.reflinkSearch = edit(inline$1.reflinkSearch, 'g').replace('reflink', inline$1.reflink).replace('nolink', inline$1.nolink).getRegex();
+       /**
+        * Normal Inline Grammar
+        */
 
-             if (!popup) {
-               var error = new Error('Popup was blocked');
-               error.status = 'popup-blocked';
-               throw error;
-             }
-           } // Request a request token. When this is complete, the popup
-           // window is redirected to OSM's authorization page.
+       inline$1.normal = merge$1({}, inline$1);
+       /**
+        * Pedantic Inline Grammar
+        */
 
+       inline$1.pedantic = merge$1({}, inline$1.normal, {
+         strong: {
+           start: /^__|\*\*/,
+           middle: /^__(?=\S)([\s\S]*?\S)__(?!_)|^\*\*(?=\S)([\s\S]*?\S)\*\*(?!\*)/,
+           endAst: /\*\*(?!\*)/g,
+           endUnd: /__(?!_)/g
+         },
+         em: {
+           start: /^_|\*/,
+           middle: /^()\*(?=\S)([\s\S]*?\S)\*(?!\*)|^_(?=\S)([\s\S]*?\S)_(?!_)/,
+           endAst: /\*(?!\*)/g,
+           endUnd: /_(?!_)/g
+         },
+         link: edit(/^!?\[(label)\]\((.*?)\)/).replace('label', inline$1._label).getRegex(),
+         reflink: edit(/^!?\[(label)\]\s*\[([^\]]*)\]/).replace('label', inline$1._label).getRegex()
+       });
+       /**
+        * GFM Inline Grammar
+        */
 
-           ohauth_1.xhr('POST', url, params, null, {}, reqTokenDone);
-           o.loading();
+       inline$1.gfm = merge$1({}, inline$1.normal, {
+         escape: edit(inline$1.escape).replace('])', '~|])').getRegex(),
+         _extended_email: /[A-Za-z0-9._+-]+(@)[a-zA-Z0-9-_]+(?:\.[a-zA-Z0-9-_]*[a-zA-Z0-9])+(?![-_])/,
+         url: /^((?:ftp|https?):\/\/|www\.)(?:[a-zA-Z0-9\-]+\.?)+[^\s<]*|^email/,
+         _backpedal: /(?:[^?!.,:;*_~()&]+|\([^)]*\)|&(?![a-zA-Z0-9]+;$)|[?!.,:;*_~)]+(?!$))+/,
+         del: /^(~~?)(?=[^\s~])([\s\S]*?[^\s~])\1(?=[^~]|$)/,
+         text: /^([`~]+|[^`~])(?:(?= {2,}\n)|(?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)|[\s\S]*?(?:(?=[\\<!\[`*~_]|\b_|https?:\/\/|ftp:\/\/|www\.|$)|[^ ](?= {2,}\n)|[^a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-](?=[a-zA-Z0-9.!#$%&'*+\/=?_`{\|}~-]+@)))/
+       });
+       inline$1.gfm.url = edit(inline$1.gfm.url, 'i').replace('email', inline$1.gfm._extended_email).getRegex();
+       /**
+        * GFM + Line Breaks Inline Grammar
+        */
 
-           function reqTokenDone(err, xhr) {
-             o.done();
-             if (err) return callback(err);
-             var resp = ohauth_1.stringQs(xhr.response);
-             token('oauth_request_token_secret', resp.oauth_token_secret);
-             var authorize_url = o.url + '/oauth/authorize?' + ohauth_1.qsString({
-               oauth_token: resp.oauth_token,
-               oauth_callback: resolveUrl$1(o.landing)
-             });
+       inline$1.breaks = merge$1({}, inline$1.gfm, {
+         br: edit(inline$1.br).replace('{2,}', '*').getRegex(),
+         text: edit(inline$1.gfm.text).replace('\\b_', '\\b_| {2,}\\n').replace(/\{2,\}/g, '*').getRegex()
+       });
+       var rules = {
+         block: block$1,
+         inline: inline$1
+       };
 
-             if (o.singlepage) {
-               location.href = authorize_url;
-             } else {
-               popup.location = authorize_url;
-             }
-           } // Called by a function in a landing page, in the popup window. The
-           // window closes itself.
+       var Tokenizer$1 = Tokenizer_1;
+       var defaults$3 = defaults$5.exports.defaults;
+       var block = rules.block,
+           inline = rules.inline;
+       var repeatString = helpers.repeatString;
+       /**
+        * smartypants text replacement
+        */
 
+       function smartypants(text) {
+         return text // em-dashes
+         .replace(/---/g, "\u2014") // en-dashes
+         .replace(/--/g, "\u2013") // opening singles
+         .replace(/(^|[-\u2014/(\[{"\s])'/g, "$1\u2018") // closing singles & apostrophes
+         .replace(/'/g, "\u2019") // opening doubles
+         .replace(/(^|[-\u2014/(\[{\u2018\s])"/g, "$1\u201C") // closing doubles
+         .replace(/"/g, "\u201D") // ellipses
+         .replace(/\.{3}/g, "\u2026");
+       }
+       /**
+        * mangle email addresses
+        */
 
-           window.authComplete = function (token) {
-             var oauth_token = ohauth_1.stringQs(token.split('?')[1]);
-             get_access_token(oauth_token.oauth_token);
-             delete window.authComplete;
-           }; // ## Getting an request token
-           //
-           // At this point we have an `oauth_token`, brought in from a function
-           // call on a landing page popup.
 
+       function mangle(text) {
+         var out = '',
+             i,
+             ch;
+         var l = text.length;
 
-           function get_access_token(oauth_token) {
-             var url = o.url + '/oauth/access_token',
-                 params = timenonce(getAuth(o)),
-                 request_token_secret = token('oauth_request_token_secret');
-             params.oauth_token = oauth_token;
-             params.oauth_signature = ohauth_1.signature(o.oauth_secret, request_token_secret, ohauth_1.baseString('POST', url, params)); // ## Getting an access token
-             //
-             // The final token required for authentication. At this point
-             // we have a `request token secret`
+         for (i = 0; i < l; i++) {
+           ch = text.charCodeAt(i);
 
-             ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-             o.loading();
+           if (Math.random() > 0.5) {
+             ch = 'x' + ch.toString(16);
            }
 
-           function accessTokenDone(err, xhr) {
-             o.done();
-             if (err) return callback(err);
-             var access_token = ohauth_1.stringQs(xhr.response);
-             token('oauth_token', access_token.oauth_token);
-             token('oauth_token_secret', access_token.oauth_token_secret);
-             callback(null, oauth);
-           }
-         };
+           out += '&#' + ch + ';';
+         }
 
-         oauth.bringPopupWindowToFront = function () {
-           var brougtPopupToFront = false;
+         return out;
+       }
+       /**
+        * Block Lexer
+        */
 
-           try {
-             // This may cause a cross-origin error:
-             // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
-             if (oauth.popupWindow && !oauth.popupWindow.closed) {
-               oauth.popupWindow.focus();
-               brougtPopupToFront = true;
-             }
-           } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
-           }
 
-           return brougtPopupToFront;
-         };
+       var Lexer_1 = /*#__PURE__*/function () {
+         function Lexer(options) {
+           _classCallCheck$1(this, Lexer);
 
-         oauth.bootstrapToken = function (oauth_token, callback) {
-           // ## Getting an request token
-           // At this point we have an `oauth_token`, brought in from a function
-           // call on a landing page popup.
-           function get_access_token(oauth_token) {
-             var url = o.url + '/oauth/access_token',
-                 params = timenonce(getAuth(o)),
-                 request_token_secret = token('oauth_request_token_secret');
-             params.oauth_token = oauth_token;
-             params.oauth_signature = ohauth_1.signature(o.oauth_secret, request_token_secret, ohauth_1.baseString('POST', url, params)); // ## Getting an access token
-             // The final token required for authentication. At this point
-             // we have a `request token secret`
+           this.tokens = [];
+           this.tokens.links = Object.create(null);
+           this.options = options || defaults$3;
+           this.options.tokenizer = this.options.tokenizer || new Tokenizer$1();
+           this.tokenizer = this.options.tokenizer;
+           this.tokenizer.options = this.options;
+           var rules = {
+             block: block.normal,
+             inline: inline.normal
+           };
 
-             ohauth_1.xhr('POST', url, params, null, {}, accessTokenDone);
-             o.loading();
-           }
+           if (this.options.pedantic) {
+             rules.block = block.pedantic;
+             rules.inline = inline.pedantic;
+           } else if (this.options.gfm) {
+             rules.block = block.gfm;
 
-           function accessTokenDone(err, xhr) {
-             o.done();
-             if (err) return callback(err);
-             var access_token = ohauth_1.stringQs(xhr.response);
-             token('oauth_token', access_token.oauth_token);
-             token('oauth_token_secret', access_token.oauth_token_secret);
-             callback(null, oauth);
+             if (this.options.breaks) {
+               rules.inline = inline.breaks;
+             } else {
+               rules.inline = inline.gfm;
+             }
            }
 
-           get_access_token(oauth_token);
-         }; // # xhr
-         //
-         // A single XMLHttpRequest wrapper that does authenticated calls if the
-         // user has logged in.
+           this.tokenizer.rules = rules;
+         }
+         /**
+          * Expose Rules
+          */
 
 
-         oauth.xhr = function (options, callback) {
-           if (!oauth.authenticated()) {
-             if (o.auto) {
-               return oauth.authenticate(run);
-             } else {
-               callback('not authenticated', null);
-               return;
-             }
-           } else {
-             return run();
+         _createClass$1(Lexer, [{
+           key: "lex",
+           value:
+           /**
+            * Preprocessing
+            */
+           function lex(src) {
+             src = src.replace(/\r\n|\r/g, '\n').replace(/\t/g, '    ');
+             this.blockTokens(src, this.tokens, true);
+             this.inline(this.tokens);
+             return this.tokens;
            }
+           /**
+            * Lexing
+            */
 
-           function run() {
-             var params = timenonce(getAuth(o)),
-                 oauth_token_secret = token('oauth_token_secret'),
-                 url = options.prefix !== false ? o.url + options.path : options.path,
-                 url_parts = url.replace(/#.*$/, '').split('?', 2),
-                 base_url = url_parts[0],
-                 query = url_parts.length === 2 ? url_parts[1] : ''; // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1
+         }, {
+           key: "blockTokens",
+           value: function blockTokens(src) {
+             var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+             var top = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : true;
 
-             if ((!options.options || !options.options.header || options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') && options.content) {
-               params = immutable(params, ohauth_1.stringQs(options.content));
+             if (this.options.pedantic) {
+               src = src.replace(/^ +$/gm, '');
              }
 
-             params.oauth_token = token('oauth_token');
-             params.oauth_signature = ohauth_1.signature(o.oauth_secret, oauth_token_secret, ohauth_1.baseString(options.method, base_url, immutable(params, ohauth_1.stringQs(query))));
-             return ohauth_1.xhr(options.method, url, params, options.content, options.options, done);
-           }
+             var token, i, l, lastToken;
 
-           function done(err, xhr) {
-             if (err) return callback(err);else if (xhr.responseXML) return callback(err, xhr.responseXML);else return callback(err, xhr.response);
-           }
-         }; // pre-authorize this object, if we can just get a token and token_secret
-         // from the start
+             while (src) {
+               // newline
+               if (token = this.tokenizer.space(src)) {
+                 src = src.substring(token.raw.length);
+
+                 if (token.type) {
+                   tokens.push(token);
+                 }
 
+                 continue;
+               } // code
 
-         oauth.preauth = function (c) {
-           if (!c) return;
-           if (c.oauth_token) token('oauth_token', c.oauth_token);
-           if (c.oauth_token_secret) token('oauth_token_secret', c.oauth_token_secret);
-           return oauth;
-         };
 
-         oauth.options = function (_) {
-           if (!arguments.length) return o;
-           o = _;
-           o.url = o.url || 'https://www.openstreetmap.org';
-           o.landing = o.landing || 'land.html';
-           o.singlepage = o.singlepage || false; // Optional loading and loading-done functions for nice UI feedback.
-           // by default, no-ops
+               if (token = this.tokenizer.code(src)) {
+                 src = src.substring(token.raw.length);
+                 lastToken = tokens[tokens.length - 1]; // An indented code block cannot interrupt a paragraph.
 
-           o.loading = o.loading || function () {};
+                 if (lastToken && lastToken.type === 'paragraph') {
+                   lastToken.raw += '\n' + token.raw;
+                   lastToken.text += '\n' + token.text;
+                 } else {
+                   tokens.push(token);
+                 }
 
-           o.done = o.done || function () {};
+                 continue;
+               } // fences
 
-           return oauth.preauth(o);
-         }; // 'stamp' an authentication object from `getAuth()`
-         // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
-         // and timestamp
 
+               if (token = this.tokenizer.fences(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // heading
 
-         function timenonce(o) {
-           o.oauth_timestamp = ohauth_1.timestamp();
-           o.oauth_nonce = ohauth_1.nonce();
-           return o;
-         } // get/set tokens. These are prefixed with the base URL so that `osm-auth`
-         // can be used with multiple APIs and the keys in `localStorage`
-         // will not clash
 
+               if (token = this.tokenizer.heading(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // table no leading pipe (gfm)
 
-         var token;
 
-         if (store_legacy.enabled) {
-           token = function token(x, y) {
-             if (arguments.length === 1) return store_legacy.get(o.url + x);else if (arguments.length === 2) return store_legacy.set(o.url + x, y);
-           };
-         } else {
-           var storage = {};
+               if (token = this.tokenizer.nptable(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // hr
 
-           token = function token(x, y) {
-             if (arguments.length === 1) return storage[o.url + x];else if (arguments.length === 2) return storage[o.url + x] = y;
-           };
-         } // Get an authentication object. If you just add and remove properties
-         // from a single object, you'll need to use `delete` to make sure that
-         // it doesn't contain undesired properties for authentication
 
+               if (token = this.tokenizer.hr(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // blockquote
 
-         function getAuth(o) {
-           return {
-             oauth_consumer_key: o.oauth_consumer_key,
-             oauth_signature_method: 'HMAC-SHA1'
-           };
-         } // potentially pre-authorize
 
+               if (token = this.tokenizer.blockquote(src)) {
+                 src = src.substring(token.raw.length);
+                 token.tokens = this.blockTokens(token.text, [], top);
+                 tokens.push(token);
+                 continue;
+               } // list
 
-         oauth.options(o);
-         return oauth;
-       };
 
-       var JXON = new function () {
-         var sValueProp = 'keyValue',
-             sAttributesProp = 'keyAttributes',
-             sAttrPref = '@',
+               if (token = this.tokenizer.list(src)) {
+                 src = src.substring(token.raw.length);
+                 l = token.items.length;
 
-         /* you can customize these values */
-         aCache = [],
-             rIsNull = /^\s*$/,
-             rIsBool = /^(?:true|false)$/i;
+                 for (i = 0; i < l; i++) {
+                   token.items[i].tokens = this.blockTokens(token.items[i].text, [], false);
+                 }
 
-         function parseText(sValue) {
-           if (rIsNull.test(sValue)) {
-             return null;
-           }
+                 tokens.push(token);
+                 continue;
+               } // html
 
-           if (rIsBool.test(sValue)) {
-             return sValue.toLowerCase() === 'true';
-           }
 
-           if (isFinite(sValue)) {
-             return parseFloat(sValue);
-           }
+               if (token = this.tokenizer.html(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // def
 
-           if (isFinite(Date.parse(sValue))) {
-             return new Date(sValue);
-           }
 
-           return sValue;
-         }
+               if (top && (token = this.tokenizer.def(src))) {
+                 src = src.substring(token.raw.length);
 
-         function EmptyTree() {}
+                 if (!this.tokens.links[token.tag]) {
+                   this.tokens.links[token.tag] = {
+                     href: token.href,
+                     title: token.title
+                   };
+                 }
 
-         EmptyTree.prototype.toString = function () {
-           return 'null';
-         };
+                 continue;
+               } // table (gfm)
 
-         EmptyTree.prototype.valueOf = function () {
-           return null;
-         };
 
-         function objectify(vValue) {
-           return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
-         }
+               if (token = this.tokenizer.table(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // lheading
 
-         function createObjTree(oParentNode, nVerb, bFreeze, bNesteAttr) {
-           var nLevelStart = aCache.length,
-               bChildren = oParentNode.hasChildNodes(),
-               bAttributes = oParentNode.hasAttributes(),
-               bHighVerb = Boolean(nVerb & 2);
-           var sProp,
-               vContent,
-               nLength = 0,
-               sCollectedTxt = '',
-               vResult = bHighVerb ? {} :
-           /* put here the default value for empty nodes: */
-           true;
 
-           if (bChildren) {
-             for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
-               oNode = oParentNode.childNodes.item(nItem);
+               if (token = this.tokenizer.lheading(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // top-level paragraph
 
-               if (oNode.nodeType === 4) {
-                 sCollectedTxt += oNode.nodeValue;
-               }
-               /* nodeType is 'CDATASection' (4) */
-               else if (oNode.nodeType === 3) {
-                   sCollectedTxt += oNode.nodeValue.trim();
-                 }
-                 /* nodeType is 'Text' (3) */
-                 else if (oNode.nodeType === 1 && !oNode.prefix) {
-                     aCache.push(oNode);
-                   }
-               /* nodeType is 'Element' (1) */
 
-             }
-           }
+               if (top && (token = this.tokenizer.paragraph(src))) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // text
 
-           var nLevelEnd = aCache.length,
-               vBuiltVal = parseText(sCollectedTxt);
 
-           if (!bHighVerb && (bChildren || bAttributes)) {
-             vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
-           }
+               if (token = this.tokenizer.text(src)) {
+                 src = src.substring(token.raw.length);
+                 lastToken = tokens[tokens.length - 1];
 
-           for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
-             sProp = aCache[nElId].nodeName.toLowerCase();
-             vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
+                 if (lastToken && lastToken.type === 'text') {
+                   lastToken.raw += '\n' + token.raw;
+                   lastToken.text += '\n' + token.text;
+                 } else {
+                   tokens.push(token);
+                 }
 
-             if (vResult.hasOwnProperty(sProp)) {
-               if (vResult[sProp].constructor !== Array) {
-                 vResult[sProp] = [vResult[sProp]];
+                 continue;
                }
 
-               vResult[sProp].push(vContent);
-             } else {
-               vResult[sProp] = vContent;
-               nLength++;
+               if (src) {
+                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
+
+                 if (this.options.silent) {
+                   console.error(errMsg);
+                   break;
+                 } else {
+                   throw new Error(errMsg);
+                 }
+               }
              }
+
+             return tokens;
            }
+         }, {
+           key: "inline",
+           value: function inline(tokens) {
+             var i, j, k, l2, row, token;
+             var l = tokens.length;
 
-           if (bAttributes) {
-             var nAttrLen = oParentNode.attributes.length,
-                 sAPrefix = bNesteAttr ? '' : sAttrPref,
-                 oAttrParent = bNesteAttr ? {} : vResult;
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
 
-             for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
-               oAttrib = oParentNode.attributes.item(nAttrib);
-               oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
-             }
+               switch (token.type) {
+                 case 'paragraph':
+                 case 'text':
+                 case 'heading':
+                   {
+                     token.tokens = [];
+                     this.inlineTokens(token.text, token.tokens);
+                     break;
+                   }
 
-             if (bNesteAttr) {
-               if (bFreeze) {
-                 Object.freeze(oAttrParent);
-               }
+                 case 'table':
+                   {
+                     token.tokens = {
+                       header: [],
+                       cells: []
+                     }; // header
 
-               vResult[sAttributesProp] = oAttrParent;
-               nLength -= nAttrLen - 1;
-             }
-           }
+                     l2 = token.header.length;
 
-           if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
-             vResult[sValueProp] = vBuiltVal;
-           } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
-             vResult = vBuiltVal;
-           }
+                     for (j = 0; j < l2; j++) {
+                       token.tokens.header[j] = [];
+                       this.inlineTokens(token.header[j], token.tokens.header[j]);
+                     } // cells
 
-           if (bFreeze && (bHighVerb || nLength > 0)) {
-             Object.freeze(vResult);
-           }
 
-           aCache.length = nLevelStart;
-           return vResult;
-         }
+                     l2 = token.cells.length;
 
-         function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
-           var vValue, oChild;
+                     for (j = 0; j < l2; j++) {
+                       row = token.cells[j];
+                       token.tokens.cells[j] = [];
 
-           if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
-             oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString()));
-             /* verbosity level is 0 */
-           } else if (oParentObj.constructor === Date) {
-             oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));
-           }
+                       for (k = 0; k < row.length; k++) {
+                         token.tokens.cells[j][k] = [];
+                         this.inlineTokens(row[k], token.tokens.cells[j][k]);
+                       }
+                     }
 
-           for (var sName in oParentObj) {
-             vValue = oParentObj[sName];
+                     break;
+                   }
 
-             if (isFinite(sName) || vValue instanceof Function) {
-               continue;
-             }
-             /* verbosity level is 0 */
+                 case 'blockquote':
+                   {
+                     this.inline(token.tokens);
+                     break;
+                   }
 
+                 case 'list':
+                   {
+                     l2 = token.items.length;
 
-             if (sName === sValueProp) {
-               if (vValue !== null && vValue !== true) {
-                 oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue)));
-               }
-             } else if (sName === sAttributesProp) {
-               /* verbosity level is 3 */
-               for (var sAttrib in vValue) {
-                 oParentEl.setAttribute(sAttrib, vValue[sAttrib]);
-               }
-             } else if (sName.charAt(0) === sAttrPref) {
-               oParentEl.setAttribute(sName.slice(1), vValue);
-             } else if (vValue.constructor === Array) {
-               for (var nItem = 0; nItem < vValue.length; nItem++) {
-                 oChild = oXMLDoc.createElement(sName);
-                 loadObjTree(oXMLDoc, oChild, vValue[nItem]);
-                 oParentEl.appendChild(oChild);
-               }
-             } else {
-               oChild = oXMLDoc.createElement(sName);
+                     for (j = 0; j < l2; j++) {
+                       this.inline(token.items[j].tokens);
+                     }
 
-               if (vValue instanceof Object) {
-                 loadObjTree(oXMLDoc, oChild, vValue);
-               } else if (vValue !== null && vValue !== true) {
-                 oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+                     break;
+                   }
                }
-
-               oParentEl.appendChild(oChild);
              }
-           }
-         }
 
-         this.build = function (oXMLParent, nVerbosity
-         /* optional */
-         , bFreeze
-         /* optional */
-         , bNesteAttributes
-         /* optional */
-         ) {
-           var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 :
-           /* put here the default verbosity level: */
-           1;
+             return tokens;
+           }
+           /**
+            * Lexing/Compiling
+            */
 
-           return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
-         };
+         }, {
+           key: "inlineTokens",
+           value: function inlineTokens(src) {
+             var tokens = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
+             var inLink = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
+             var inRawBlock = arguments.length > 3 && arguments[3] !== undefined ? arguments[3] : false;
+             var token, lastToken; // String with links masked to avoid interference with em and strong
 
-         this.unbuild = function (oObjTree) {
-           var oNewDoc = document.implementation.createDocument('', '', null);
-           loadObjTree(oNewDoc, oNewDoc, oObjTree);
-           return oNewDoc;
-         };
+             var maskedSrc = src;
+             var match;
+             var keepPrevChar, prevChar; // Mask out reflinks
 
-         this.stringify = function (oObjTree) {
-           return new XMLSerializer().serializeToString(JXON.unbuild(oObjTree));
-         };
-       }(); // var myObject = JXON.build(doc);
-       // we got our javascript object! try: alert(JSON.stringify(myObject));
-       // var newDoc = JXON.unbuild(myObject);
-       // we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
+             if (this.tokens.links) {
+               var links = Object.keys(this.tokens.links);
 
-       var tiler$5 = utilTiler();
-       var dispatch$6 = dispatch('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
-       var urlroot = 'https://www.openstreetmap.org';
-       var oauth = osmAuth({
-         url: urlroot,
-         oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
-         oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
-         loading: authLoading,
-         done: authDone
-       }); // hardcode default block of Google Maps
+               if (links.length > 0) {
+                 while ((match = this.tokenizer.rules.inline.reflinkSearch.exec(maskedSrc)) != null) {
+                   if (links.includes(match[0].slice(match[0].lastIndexOf('[') + 1, -1))) {
+                     maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.reflinkSearch.lastIndex);
+                   }
+                 }
+               }
+             } // Mask out other blocks
 
-       var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
-       var _tileCache = {
-         toLoad: {},
-         loaded: {},
-         inflight: {},
-         seen: {},
-         rtree: new RBush()
-       };
-       var _noteCache = {
-         toLoad: {},
-         loaded: {},
-         inflight: {},
-         inflightPost: {},
-         note: {},
-         closed: {},
-         rtree: new RBush()
-       };
-       var _userCache = {
-         toLoad: {},
-         user: {}
-       };
 
-       var _cachedApiStatus;
+             while ((match = this.tokenizer.rules.inline.blockSkip.exec(maskedSrc)) != null) {
+               maskedSrc = maskedSrc.slice(0, match.index) + '[' + repeatString('a', match[0].length - 2) + ']' + maskedSrc.slice(this.tokenizer.rules.inline.blockSkip.lastIndex);
+             } // Mask out escaped em & strong delimiters
 
-       var _changeset = {};
 
-       var _deferred = new Set();
+             while ((match = this.tokenizer.rules.inline.escapedEmSt.exec(maskedSrc)) != null) {
+               maskedSrc = maskedSrc.slice(0, match.index) + '++' + maskedSrc.slice(this.tokenizer.rules.inline.escapedEmSt.lastIndex);
+             }
 
-       var _connectionID = 1;
-       var _tileZoom$3 = 16;
-       var _noteZoom = 12;
+             while (src) {
+               if (!keepPrevChar) {
+                 prevChar = '';
+               }
 
-       var _rateLimitError;
+               keepPrevChar = false; // escape
 
-       var _userChangesets;
+               if (token = this.tokenizer.escape(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // tag
 
-       var _userDetails;
 
-       var _off; // set a default but also load this from the API status
+               if (token = this.tokenizer.tag(src, inLink, inRawBlock)) {
+                 src = src.substring(token.raw.length);
+                 inLink = token.inLink;
+                 inRawBlock = token.inRawBlock;
+                 var _lastToken = tokens[tokens.length - 1];
 
+                 if (_lastToken && token.type === 'text' && _lastToken.type === 'text') {
+                   _lastToken.raw += token.raw;
+                   _lastToken.text += token.text;
+                 } else {
+                   tokens.push(token);
+                 }
 
-       var _maxWayNodes = 2000;
+                 continue;
+               } // link
 
-       function authLoading() {
-         dispatch$6.call('authLoading');
-       }
 
-       function authDone() {
-         dispatch$6.call('authDone');
-       }
+               if (token = this.tokenizer.link(src)) {
+                 src = src.substring(token.raw.length);
 
-       function abortRequest$5(controllerOrXHR) {
-         if (controllerOrXHR) {
-           controllerOrXHR.abort();
-         }
-       }
+                 if (token.type === 'link') {
+                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+                 }
 
-       function hasInflightRequests(cache) {
-         return Object.keys(cache.inflight).length;
-       }
+                 tokens.push(token);
+                 continue;
+               } // reflink, nolink
 
-       function abortUnwantedRequests$3(cache, visibleTiles) {
-         Object.keys(cache.inflight).forEach(function (k) {
-           if (cache.toLoad[k]) return;
-           if (visibleTiles.find(function (tile) {
-             return k === tile.id;
-           })) return;
-           abortRequest$5(cache.inflight[k]);
-           delete cache.inflight[k];
-         });
-       }
 
-       function getLoc(attrs) {
-         var lon = attrs.lon && attrs.lon.value;
-         var lat = attrs.lat && attrs.lat.value;
-         return [parseFloat(lon), parseFloat(lat)];
-       }
+               if (token = this.tokenizer.reflink(src, this.tokens.links)) {
+                 src = src.substring(token.raw.length);
+                 var _lastToken2 = tokens[tokens.length - 1];
 
-       function getNodes(obj) {
-         var elems = obj.getElementsByTagName('nd');
-         var nodes = new Array(elems.length);
+                 if (token.type === 'link') {
+                   token.tokens = this.inlineTokens(token.text, [], true, inRawBlock);
+                   tokens.push(token);
+                 } else if (_lastToken2 && token.type === 'text' && _lastToken2.type === 'text') {
+                   _lastToken2.raw += token.raw;
+                   _lastToken2.text += token.text;
+                 } else {
+                   tokens.push(token);
+                 }
 
-         for (var i = 0, l = elems.length; i < l; i++) {
-           nodes[i] = 'n' + elems[i].attributes.ref.value;
-         }
+                 continue;
+               } // em & strong
 
-         return nodes;
-       }
 
-       function getNodesJSON(obj) {
-         var elems = obj.nodes;
-         var nodes = new Array(elems.length);
+               if (token = this.tokenizer.emStrong(src, maskedSrc, prevChar)) {
+                 src = src.substring(token.raw.length);
+                 token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+                 tokens.push(token);
+                 continue;
+               } // code
 
-         for (var i = 0, l = elems.length; i < l; i++) {
-           nodes[i] = 'n' + elems[i];
-         }
 
-         return nodes;
-       }
+               if (token = this.tokenizer.codespan(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // br
 
-       function getTags(obj) {
-         var elems = obj.getElementsByTagName('tag');
-         var tags = {};
 
-         for (var i = 0, l = elems.length; i < l; i++) {
-           var attrs = elems[i].attributes;
-           tags[attrs.k.value] = attrs.v.value;
-         }
+               if (token = this.tokenizer.br(src)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // del (gfm)
 
-         return tags;
-       }
 
-       function getMembers(obj) {
-         var elems = obj.getElementsByTagName('member');
-         var members = new Array(elems.length);
+               if (token = this.tokenizer.del(src)) {
+                 src = src.substring(token.raw.length);
+                 token.tokens = this.inlineTokens(token.text, [], inLink, inRawBlock);
+                 tokens.push(token);
+                 continue;
+               } // autolink
 
-         for (var i = 0, l = elems.length; i < l; i++) {
-           var attrs = elems[i].attributes;
-           members[i] = {
-             id: attrs.type.value[0] + attrs.ref.value,
-             type: attrs.type.value,
-             role: attrs.role.value
-           };
-         }
 
-         return members;
-       }
+               if (token = this.tokenizer.autolink(src, mangle)) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // url (gfm)
 
-       function getMembersJSON(obj) {
-         var elems = obj.members;
-         var members = new Array(elems.length);
 
-         for (var i = 0, l = elems.length; i < l; i++) {
-           var attrs = elems[i];
-           members[i] = {
-             id: attrs.type[0] + attrs.ref,
-             type: attrs.type,
-             role: attrs.role
-           };
-         }
+               if (!inLink && (token = this.tokenizer.url(src, mangle))) {
+                 src = src.substring(token.raw.length);
+                 tokens.push(token);
+                 continue;
+               } // text
 
-         return members;
-       }
 
-       function getVisible(attrs) {
-         return !attrs.visible || attrs.visible.value !== 'false';
-       }
+               if (token = this.tokenizer.inlineText(src, inRawBlock, smartypants)) {
+                 src = src.substring(token.raw.length);
 
-       function parseComments(comments) {
-         var parsedComments = []; // for each comment
+                 if (token.raw.slice(-1) !== '_') {
+                   // Track prevChar before string of ____ started
+                   prevChar = token.raw.slice(-1);
+                 }
 
-         for (var i = 0; i < comments.length; i++) {
-           var comment = comments[i];
+                 keepPrevChar = true;
+                 lastToken = tokens[tokens.length - 1];
 
-           if (comment.nodeName === 'comment') {
-             var childNodes = comment.childNodes;
-             var parsedComment = {};
+                 if (lastToken && lastToken.type === 'text') {
+                   lastToken.raw += token.raw;
+                   lastToken.text += token.text;
+                 } else {
+                   tokens.push(token);
+                 }
 
-             for (var j = 0; j < childNodes.length; j++) {
-               var node = childNodes[j];
-               var nodeName = node.nodeName;
-               if (nodeName === '#text') continue;
-               parsedComment[nodeName] = node.textContent;
+                 continue;
+               }
 
-               if (nodeName === 'uid') {
-                 var uid = node.textContent;
+               if (src) {
+                 var errMsg = 'Infinite loop on byte: ' + src.charCodeAt(0);
 
-                 if (uid && !_userCache.user[uid]) {
-                   _userCache.toLoad[uid] = true;
+                 if (this.options.silent) {
+                   console.error(errMsg);
+                   break;
+                 } else {
+                   throw new Error(errMsg);
                  }
                }
              }
 
-             if (parsedComment) {
-               parsedComments.push(parsedComment);
-             }
+             return tokens;
            }
-         }
+         }], [{
+           key: "rules",
+           get: function get() {
+             return {
+               block: block,
+               inline: inline
+             };
+           }
+           /**
+            * Static Lex Method
+            */
 
-         return parsedComments;
-       }
+         }, {
+           key: "lex",
+           value: function lex(src, options) {
+             var lexer = new Lexer(options);
+             return lexer.lex(src);
+           }
+           /**
+            * Static Lex Inline Method
+            */
 
-       function encodeNoteRtree(note) {
-         return {
-           minX: note.loc[0],
-           minY: note.loc[1],
-           maxX: note.loc[0],
-           maxY: note.loc[1],
-           data: note
-         };
-       }
+         }, {
+           key: "lexInline",
+           value: function lexInline(src, options) {
+             var lexer = new Lexer(options);
+             return lexer.inlineTokens(src);
+           }
+         }]);
 
-       var jsonparsers = {
-         node: function nodeData(obj, uid) {
-           return new osmNode({
-             id: uid,
-             visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-             version: obj.version && obj.version.toString(),
-             changeset: obj.changeset && obj.changeset.toString(),
-             timestamp: obj.timestamp,
-             user: obj.user,
-             uid: obj.uid && obj.uid.toString(),
-             loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
-             tags: obj.tags
-           });
-         },
-         way: function wayData(obj, uid) {
-           return new osmWay({
-             id: uid,
-             visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-             version: obj.version && obj.version.toString(),
-             changeset: obj.changeset && obj.changeset.toString(),
-             timestamp: obj.timestamp,
-             user: obj.user,
-             uid: obj.uid && obj.uid.toString(),
-             tags: obj.tags,
-             nodes: getNodesJSON(obj)
-           });
-         },
-         relation: function relationData(obj, uid) {
-           return new osmRelation({
-             id: uid,
-             visible: typeof obj.visible === 'boolean' ? obj.visible : true,
-             version: obj.version && obj.version.toString(),
-             changeset: obj.changeset && obj.changeset.toString(),
-             timestamp: obj.timestamp,
-             user: obj.user,
-             uid: obj.uid && obj.uid.toString(),
-             tags: obj.tags,
-             members: getMembersJSON(obj)
-           });
-         }
-       };
+         return Lexer;
+       }();
 
-       function parseJSON(payload, callback, options) {
-         options = Object.assign({
-           skipSeen: true
-         }, options);
+       var defaults$2 = defaults$5.exports.defaults;
+       var cleanUrl = helpers.cleanUrl,
+           escape$2 = helpers.escape;
+       /**
+        * Renderer
+        */
 
-         if (!payload) {
-           return callback({
-             message: 'No JSON',
-             status: -1
-           });
+       var Renderer_1 = /*#__PURE__*/function () {
+         function Renderer(options) {
+           _classCallCheck$1(this, Renderer);
+
+           this.options = options || defaults$2;
          }
 
-         var json = payload;
-         if (_typeof(json) !== 'object') json = JSON.parse(payload);
-         if (!json.elements) return callback({
-           message: 'No JSON',
-           status: -1
-         });
-         var children = json.elements;
-         var handle = window.requestIdleCallback(function () {
-           var results = [];
-           var result;
+         _createClass$1(Renderer, [{
+           key: "code",
+           value: function code(_code, infostring, escaped) {
+             var lang = (infostring || '').match(/\S*/)[0];
 
-           for (var i = 0; i < children.length; i++) {
-             result = parseChild(children[i]);
-             if (result) results.push(result);
+             if (this.options.highlight) {
+               var out = this.options.highlight(_code, lang);
+
+               if (out != null && out !== _code) {
+                 escaped = true;
+                 _code = out;
+               }
+             }
+
+             _code = _code.replace(/\n$/, '') + '\n';
+
+             if (!lang) {
+               return '<pre><code>' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+             }
+
+             return '<pre><code class="' + this.options.langPrefix + escape$2(lang, true) + '">' + (escaped ? _code : escape$2(_code, true)) + '</code></pre>\n';
+           }
+         }, {
+           key: "blockquote",
+           value: function blockquote(quote) {
+             return '<blockquote>\n' + quote + '</blockquote>\n';
+           }
+         }, {
+           key: "html",
+           value: function html(_html) {
+             return _html;
+           }
+         }, {
+           key: "heading",
+           value: function heading(text, level, raw, slugger) {
+             if (this.options.headerIds) {
+               return '<h' + level + ' id="' + this.options.headerPrefix + slugger.slug(raw) + '">' + text + '</h' + level + '>\n';
+             } // ignore IDs
+
+
+             return '<h' + level + '>' + text + '</h' + level + '>\n';
+           }
+         }, {
+           key: "hr",
+           value: function hr() {
+             return this.options.xhtml ? '<hr/>\n' : '<hr>\n';
+           }
+         }, {
+           key: "list",
+           value: function list(body, ordered, start) {
+             var type = ordered ? 'ol' : 'ul',
+                 startatt = ordered && start !== 1 ? ' start="' + start + '"' : '';
+             return '<' + type + startatt + '>\n' + body + '</' + type + '>\n';
+           }
+         }, {
+           key: "listitem",
+           value: function listitem(text) {
+             return '<li>' + text + '</li>\n';
+           }
+         }, {
+           key: "checkbox",
+           value: function checkbox(checked) {
+             return '<input ' + (checked ? 'checked="" ' : '') + 'disabled="" type="checkbox"' + (this.options.xhtml ? ' /' : '') + '> ';
+           }
+         }, {
+           key: "paragraph",
+           value: function paragraph(text) {
+             return '<p>' + text + '</p>\n';
            }
+         }, {
+           key: "table",
+           value: function table(header, body) {
+             if (body) body = '<tbody>' + body + '</tbody>';
+             return '<table>\n' + '<thead>\n' + header + '</thead>\n' + body + '</table>\n';
+           }
+         }, {
+           key: "tablerow",
+           value: function tablerow(content) {
+             return '<tr>\n' + content + '</tr>\n';
+           }
+         }, {
+           key: "tablecell",
+           value: function tablecell(content, flags) {
+             var type = flags.header ? 'th' : 'td';
+             var tag = flags.align ? '<' + type + ' align="' + flags.align + '">' : '<' + type + '>';
+             return tag + content + '</' + type + '>\n';
+           } // span level renderer
 
-           callback(null, results);
-         });
+         }, {
+           key: "strong",
+           value: function strong(text) {
+             return '<strong>' + text + '</strong>';
+           }
+         }, {
+           key: "em",
+           value: function em(text) {
+             return '<em>' + text + '</em>';
+           }
+         }, {
+           key: "codespan",
+           value: function codespan(text) {
+             return '<code>' + text + '</code>';
+           }
+         }, {
+           key: "br",
+           value: function br() {
+             return this.options.xhtml ? '<br/>' : '<br>';
+           }
+         }, {
+           key: "del",
+           value: function del(text) {
+             return '<del>' + text + '</del>';
+           }
+         }, {
+           key: "link",
+           value: function link(href, title, text) {
+             href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
 
-         _deferred.add(handle);
+             if (href === null) {
+               return text;
+             }
 
-         function parseChild(child) {
-           var parser = jsonparsers[child.type];
-           if (!parser) return null;
-           var uid;
-           uid = osmEntity.id.fromOSM(child.type, child.id);
+             var out = '<a href="' + escape$2(href) + '"';
 
-           if (options.skipSeen) {
-             if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+             if (title) {
+               out += ' title="' + title + '"';
+             }
 
-             _tileCache.seen[uid] = true;
+             out += '>' + text + '</a>';
+             return out;
            }
+         }, {
+           key: "image",
+           value: function image(href, title, text) {
+             href = cleanUrl(this.options.sanitize, this.options.baseUrl, href);
 
-           return parser(child, uid);
-         }
-       }
-
-       var parsers = {
-         node: function nodeData(obj, uid) {
-           var attrs = obj.attributes;
-           return new osmNode({
-             id: uid,
-             visible: getVisible(attrs),
-             version: attrs.version.value,
-             changeset: attrs.changeset && attrs.changeset.value,
-             timestamp: attrs.timestamp && attrs.timestamp.value,
-             user: attrs.user && attrs.user.value,
-             uid: attrs.uid && attrs.uid.value,
-             loc: getLoc(attrs),
-             tags: getTags(obj)
-           });
-         },
-         way: function wayData(obj, uid) {
-           var attrs = obj.attributes;
-           return new osmWay({
-             id: uid,
-             visible: getVisible(attrs),
-             version: attrs.version.value,
-             changeset: attrs.changeset && attrs.changeset.value,
-             timestamp: attrs.timestamp && attrs.timestamp.value,
-             user: attrs.user && attrs.user.value,
-             uid: attrs.uid && attrs.uid.value,
-             tags: getTags(obj),
-             nodes: getNodes(obj)
-           });
-         },
-         relation: function relationData(obj, uid) {
-           var attrs = obj.attributes;
-           return new osmRelation({
-             id: uid,
-             visible: getVisible(attrs),
-             version: attrs.version.value,
-             changeset: attrs.changeset && attrs.changeset.value,
-             timestamp: attrs.timestamp && attrs.timestamp.value,
-             user: attrs.user && attrs.user.value,
-             uid: attrs.uid && attrs.uid.value,
-             tags: getTags(obj),
-             members: getMembers(obj)
-           });
-         },
-         note: function parseNote(obj, uid) {
-           var attrs = obj.attributes;
-           var childNodes = obj.childNodes;
-           var props = {};
-           props.id = uid;
-           props.loc = getLoc(attrs); // if notes are coincident, move them apart slightly
+             if (href === null) {
+               return text;
+             }
 
-           var coincident = false;
-           var epsilon = 0.00001;
+             var out = '<img src="' + href + '" alt="' + text + '"';
 
-           do {
-             if (coincident) {
-               props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
+             if (title) {
+               out += ' title="' + title + '"';
              }
 
-             var bbox = geoExtent(props.loc).bbox();
-             coincident = _noteCache.rtree.search(bbox).length;
-           } while (coincident); // parse note contents
+             out += this.options.xhtml ? '/>' : '>';
+             return out;
+           }
+         }, {
+           key: "text",
+           value: function text(_text) {
+             return _text;
+           }
+         }]);
 
+         return Renderer;
+       }();
 
-           for (var i = 0; i < childNodes.length; i++) {
-             var node = childNodes[i];
-             var nodeName = node.nodeName;
-             if (nodeName === '#text') continue; // if the element is comments, parse the comments
+       var TextRenderer_1 = /*#__PURE__*/function () {
+         function TextRenderer() {
+           _classCallCheck$1(this, TextRenderer);
+         }
 
-             if (nodeName === 'comments') {
-               props[nodeName] = parseComments(node.childNodes);
-             } else {
-               props[nodeName] = node.textContent;
-             }
+         _createClass$1(TextRenderer, [{
+           key: "strong",
+           value: // no need for block level renderers
+           function strong(text) {
+             return text;
+           }
+         }, {
+           key: "em",
+           value: function em(text) {
+             return text;
+           }
+         }, {
+           key: "codespan",
+           value: function codespan(text) {
+             return text;
+           }
+         }, {
+           key: "del",
+           value: function del(text) {
+             return text;
+           }
+         }, {
+           key: "html",
+           value: function html(text) {
+             return text;
+           }
+         }, {
+           key: "text",
+           value: function text(_text) {
+             return _text;
+           }
+         }, {
+           key: "link",
+           value: function link(href, title, text) {
+             return '' + text;
+           }
+         }, {
+           key: "image",
+           value: function image(href, title, text) {
+             return '' + text;
+           }
+         }, {
+           key: "br",
+           value: function br() {
+             return '';
            }
+         }]);
 
-           var note = new osmNote(props);
-           var item = encodeNoteRtree(note);
-           _noteCache.note[note.id] = note;
+         return TextRenderer;
+       }();
 
-           _noteCache.rtree.insert(item);
+       var Slugger_1 = /*#__PURE__*/function () {
+         function Slugger() {
+           _classCallCheck$1(this, Slugger);
 
-           return note;
-         },
-         user: function parseUser(obj, uid) {
-           var attrs = obj.attributes;
-           var user = {
-             id: uid,
-             display_name: attrs.display_name && attrs.display_name.value,
-             account_created: attrs.account_created && attrs.account_created.value,
-             changesets_count: '0',
-             active_blocks: '0'
-           };
-           var img = obj.getElementsByTagName('img');
+           this.seen = {};
+         }
 
-           if (img && img[0] && img[0].getAttribute('href')) {
-             user.image_url = img[0].getAttribute('href');
+         _createClass$1(Slugger, [{
+           key: "serialize",
+           value: function serialize(value) {
+             return value.toLowerCase().trim() // remove html tags
+             .replace(/<[!\/a-z].*?>/ig, '') // remove unwanted chars
+             .replace(/[\u2000-\u206F\u2E00-\u2E7F\\'!"#$%&()*+,./:;<=>?@[\]^`{|}~]/g, '').replace(/\s/g, '-');
            }
+           /**
+            * Finds the next safe (unique) slug to use
+            */
 
-           var changesets = obj.getElementsByTagName('changesets');
-
-           if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
-             user.changesets_count = changesets[0].getAttribute('count');
-           }
+         }, {
+           key: "getNextSafeSlug",
+           value: function getNextSafeSlug(originalSlug, isDryRun) {
+             var slug = originalSlug;
+             var occurenceAccumulator = 0;
 
-           var blocks = obj.getElementsByTagName('blocks');
+             if (this.seen.hasOwnProperty(slug)) {
+               occurenceAccumulator = this.seen[originalSlug];
 
-           if (blocks && blocks[0]) {
-             var received = blocks[0].getElementsByTagName('received');
+               do {
+                 occurenceAccumulator++;
+                 slug = originalSlug + '-' + occurenceAccumulator;
+               } while (this.seen.hasOwnProperty(slug));
+             }
 
-             if (received && received[0] && received[0].getAttribute('active')) {
-               user.active_blocks = received[0].getAttribute('active');
+             if (!isDryRun) {
+               this.seen[originalSlug] = occurenceAccumulator;
+               this.seen[slug] = 0;
              }
+
+             return slug;
            }
+           /**
+            * Convert string to unique id
+            * @param {object} options
+            * @param {boolean} options.dryrun Generates the next unique slug without updating the internal accumulator.
+            */
 
-           _userCache.user[uid] = user;
-           delete _userCache.toLoad[uid];
-           return user;
-         }
-       };
+         }, {
+           key: "slug",
+           value: function slug(value) {
+             var options = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+             var slug = this.serialize(value);
+             return this.getNextSafeSlug(slug, options.dryrun);
+           }
+         }]);
 
-       function parseXML(xml, callback, options) {
-         options = Object.assign({
-           skipSeen: true
-         }, options);
+         return Slugger;
+       }();
 
-         if (!xml || !xml.childNodes) {
-           return callback({
-             message: 'No XML',
-             status: -1
-           });
+       var Renderer$1 = Renderer_1;
+       var TextRenderer$1 = TextRenderer_1;
+       var Slugger$1 = Slugger_1;
+       var defaults$1 = defaults$5.exports.defaults;
+       var unescape$1 = helpers.unescape;
+       /**
+        * Parsing & Compiling
+        */
+
+       var Parser_1 = /*#__PURE__*/function () {
+         function Parser(options) {
+           _classCallCheck$1(this, Parser);
+
+           this.options = options || defaults$1;
+           this.options.renderer = this.options.renderer || new Renderer$1();
+           this.renderer = this.options.renderer;
+           this.renderer.options = this.options;
+           this.textRenderer = new TextRenderer$1();
+           this.slugger = new Slugger$1();
          }
+         /**
+          * Static Parse Method
+          */
 
-         var root = xml.childNodes[0];
-         var children = root.childNodes;
-         var handle = window.requestIdleCallback(function () {
-           var results = [];
-           var result;
 
-           for (var i = 0; i < children.length; i++) {
-             result = parseChild(children[i]);
-             if (result) results.push(result);
-           }
+         _createClass$1(Parser, [{
+           key: "parse",
+           value:
+           /**
+            * Parse Loop
+            */
+           function parse(tokens) {
+             var top = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : true;
+             var out = '',
+                 i,
+                 j,
+                 k,
+                 l2,
+                 l3,
+                 row,
+                 cell,
+                 header,
+                 body,
+                 token,
+                 ordered,
+                 start,
+                 loose,
+                 itemBody,
+                 item,
+                 checked,
+                 task,
+                 checkbox;
+             var l = tokens.length;
 
-           callback(null, results);
-         });
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
 
-         _deferred.add(handle);
+               switch (token.type) {
+                 case 'space':
+                   {
+                     continue;
+                   }
 
-         function parseChild(child) {
-           var parser = parsers[child.nodeName];
-           if (!parser) return null;
-           var uid;
+                 case 'hr':
+                   {
+                     out += this.renderer.hr();
+                     continue;
+                   }
 
-           if (child.nodeName === 'user') {
-             uid = child.attributes.id.value;
+                 case 'heading':
+                   {
+                     out += this.renderer.heading(this.parseInline(token.tokens), token.depth, unescape$1(this.parseInline(token.tokens, this.textRenderer)), this.slugger);
+                     continue;
+                   }
 
-             if (options.skipSeen && _userCache.user[uid]) {
-               delete _userCache.toLoad[uid];
-               return null;
-             }
-           } else if (child.nodeName === 'note') {
-             uid = child.getElementsByTagName('id')[0].textContent;
-           } else {
-             uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
+                 case 'code':
+                   {
+                     out += this.renderer.code(token.text, token.lang, token.escaped);
+                     continue;
+                   }
 
-             if (options.skipSeen) {
-               if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
+                 case 'table':
+                   {
+                     header = ''; // header
 
-               _tileCache.seen[uid] = true;
-             }
-           }
+                     cell = '';
+                     l2 = token.header.length;
 
-           return parser(child, uid);
-         }
-       } // replace or remove note from rtree
+                     for (j = 0; j < l2; j++) {
+                       cell += this.renderer.tablecell(this.parseInline(token.tokens.header[j]), {
+                         header: true,
+                         align: token.align[j]
+                       });
+                     }
 
+                     header += this.renderer.tablerow(cell);
+                     body = '';
+                     l2 = token.cells.length;
 
-       function updateRtree$3(item, replace) {
-         _noteCache.rtree.remove(item, function isEql(a, b) {
-           return a.data.id === b.data.id;
-         });
+                     for (j = 0; j < l2; j++) {
+                       row = token.tokens.cells[j];
+                       cell = '';
+                       l3 = row.length;
 
-         if (replace) {
-           _noteCache.rtree.insert(item);
-         }
-       }
+                       for (k = 0; k < l3; k++) {
+                         cell += this.renderer.tablecell(this.parseInline(row[k]), {
+                           header: false,
+                           align: token.align[k]
+                         });
+                       }
 
-       function wrapcb(thisArg, callback, cid) {
-         return function (err, result) {
-           if (err) {
-             // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-             if (err.status === 400 || err.status === 401 || err.status === 403) {
-               thisArg.logout();
-             }
+                       body += this.renderer.tablerow(cell);
+                     }
 
-             return callback.call(thisArg, err);
-           } else if (thisArg.getConnectionId() !== cid) {
-             return callback.call(thisArg, {
-               message: 'Connection Switched',
-               status: -1
-             });
-           } else {
-             return callback.call(thisArg, err, result);
-           }
-         };
-       }
+                     out += this.renderer.table(header, body);
+                     continue;
+                   }
 
-       var serviceOsm = {
-         init: function init() {
-           utilRebind(this, dispatch$6, 'on');
-         },
-         reset: function reset() {
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
+                 case 'blockquote':
+                   {
+                     body = this.parse(token.tokens);
+                     out += this.renderer.blockquote(body);
+                     continue;
+                   }
 
-             _deferred["delete"](handle);
-           });
-           _connectionID++;
-           _userChangesets = undefined;
-           _userDetails = undefined;
-           _rateLimitError = undefined;
-           Object.values(_tileCache.inflight).forEach(abortRequest$5);
-           Object.values(_noteCache.inflight).forEach(abortRequest$5);
-           Object.values(_noteCache.inflightPost).forEach(abortRequest$5);
-           if (_changeset.inflight) abortRequest$5(_changeset.inflight);
-           _tileCache = {
-             toLoad: {},
-             loaded: {},
-             inflight: {},
-             seen: {},
-             rtree: new RBush()
-           };
-           _noteCache = {
-             toLoad: {},
-             loaded: {},
-             inflight: {},
-             inflightPost: {},
-             note: {},
-             closed: {},
-             rtree: new RBush()
-           };
-           _userCache = {
-             toLoad: {},
-             user: {}
-           };
-           _cachedApiStatus = undefined;
-           _changeset = {};
-           return this;
-         },
-         getConnectionId: function getConnectionId() {
-           return _connectionID;
-         },
-         changesetURL: function changesetURL(changesetID) {
-           return urlroot + '/changeset/' + changesetID;
-         },
-         changesetsURL: function changesetsURL(center, zoom) {
-           var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-           return urlroot + '/history#map=' + Math.floor(zoom) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
-         },
-         entityURL: function entityURL(entity) {
-           return urlroot + '/' + entity.type + '/' + entity.osmId();
-         },
-         historyURL: function historyURL(entity) {
-           return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
-         },
-         userURL: function userURL(username) {
-           return urlroot + '/user/' + username;
-         },
-         noteURL: function noteURL(note) {
-           return urlroot + '/note/' + note.id;
-         },
-         noteReportURL: function noteReportURL(note) {
-           return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
-         },
-         // Generic method to load data from the OSM API
-         // Can handle either auth or unauth calls.
-         loadFromAPI: function loadFromAPI(path, callback, options) {
-           options = Object.assign({
-             skipSeen: true
-           }, options);
-           var that = this;
-           var cid = _connectionID;
+                 case 'list':
+                   {
+                     ordered = token.ordered;
+                     start = token.start;
+                     loose = token.loose;
+                     l2 = token.items.length;
+                     body = '';
 
-           function done(err, payload) {
-             if (that.getConnectionId() !== cid) {
-               if (callback) callback({
-                 message: 'Connection Switched',
-                 status: -1
-               });
-               return;
-             }
+                     for (j = 0; j < l2; j++) {
+                       item = token.items[j];
+                       checked = item.checked;
+                       task = item.task;
+                       itemBody = '';
 
-             var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
-             // Logout and retry the request..
+                       if (item.task) {
+                         checkbox = this.renderer.checkbox(checked);
 
-             if (isAuthenticated && err && err.status && (err.status === 400 || err.status === 401 || err.status === 403)) {
-               that.logout();
-               that.loadFromAPI(path, callback, options); // else, no retry..
-             } else {
-               // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
-               // Set the rateLimitError flag and trigger a warning..
-               if (!isAuthenticated && !_rateLimitError && err && err.status && (err.status === 509 || err.status === 429)) {
-                 _rateLimitError = err;
-                 dispatch$6.call('change');
-                 that.reloadApiStatus();
-               } else if (err && _cachedApiStatus === 'online' || !err && _cachedApiStatus !== 'online') {
-                 // If the response's error state doesn't match the status,
-                 // it's likely we lost or gained the connection so reload the status
-                 that.reloadApiStatus();
-               }
+                         if (loose) {
+                           if (item.tokens.length > 0 && item.tokens[0].type === 'text') {
+                             item.tokens[0].text = checkbox + ' ' + item.tokens[0].text;
 
-               if (callback) {
-                 if (err) {
-                   return callback(err);
-                 } else {
-                   if (path.indexOf('.json') !== -1) {
-                     return parseJSON(payload, callback, options);
-                   } else {
-                     return parseXML(payload, callback, options);
+                             if (item.tokens[0].tokens && item.tokens[0].tokens.length > 0 && item.tokens[0].tokens[0].type === 'text') {
+                               item.tokens[0].tokens[0].text = checkbox + ' ' + item.tokens[0].tokens[0].text;
+                             }
+                           } else {
+                             item.tokens.unshift({
+                               type: 'text',
+                               text: checkbox
+                             });
+                           }
+                         } else {
+                           itemBody += checkbox;
+                         }
+                       }
+
+                       itemBody += this.parse(item.tokens, loose);
+                       body += this.renderer.listitem(itemBody, task, checked);
+                     }
+
+                     out += this.renderer.list(body, ordered, start);
+                     continue;
                    }
-                 }
-               }
-             }
-           }
 
-           if (this.authenticated()) {
-             return oauth.xhr({
-               method: 'GET',
-               path: path
-             }, done);
-           } else {
-             var url = urlroot + path;
-             var controller = new AbortController();
-             d3_json(url, {
-               signal: controller.signal
-             }).then(function (data) {
-               done(null, data);
-             })["catch"](function (err) {
-               if (err.name === 'AbortError') return; // d3-fetch includes status in the error message,
-               // but we can't access the response itself
-               // https://github.com/d3/d3-fetch/issues/27
+                 case 'html':
+                   {
+                     // TODO parse inline content if parameter markdown=1
+                     out += this.renderer.html(token.text);
+                     continue;
+                   }
 
-               var match = err.message.match(/^\d{3}/);
+                 case 'paragraph':
+                   {
+                     out += this.renderer.paragraph(this.parseInline(token.tokens));
+                     continue;
+                   }
 
-               if (match) {
-                 done({
-                   status: +match[0],
-                   statusText: err.message
-                 });
-               } else {
-                 done(err.message);
-               }
-             });
-             return controller;
-           }
-         },
-         // Load a single entity by id (ways and relations use the `/full` call)
-         // GET /api/0.6/node/#id
-         // GET /api/0.6/[way|relation]/#id/full
-         loadEntity: function loadEntity(id, callback) {
-           var type = osmEntity.id.type(id);
-           var osmID = osmEntity.id.toOSM(id);
-           var options = {
-             skipSeen: false
-           };
-           this.loadFromAPI('/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json', function (err, entities) {
-             if (callback) callback(err, {
-               data: entities
-             });
-           }, options);
-         },
-         // Load a single entity with a specific version
-         // GET /api/0.6/[node|way|relation]/#id/#version
-         loadEntityVersion: function loadEntityVersion(id, version, callback) {
-           var type = osmEntity.id.type(id);
-           var osmID = osmEntity.id.toOSM(id);
-           var options = {
-             skipSeen: false
-           };
-           this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/' + version + '.json', function (err, entities) {
-             if (callback) callback(err, {
-               data: entities
-             });
-           }, options);
-         },
-         // Load multiple entities in chunks
-         // (note: callback may be called multiple times)
-         // Unlike `loadEntity`, child nodes and members are not fetched
-         // GET /api/0.6/[nodes|ways|relations]?#parameters
-         loadMultiple: function loadMultiple(ids, callback) {
-           var that = this;
-           var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
-           Object.keys(groups).forEach(function (k) {
-             var type = k + 's'; // nodes, ways, relations
+                 case 'text':
+                   {
+                     body = token.tokens ? this.parseInline(token.tokens) : token.text;
 
-             var osmIDs = groups[k].map(function (id) {
-               return osmEntity.id.toOSM(id);
-             });
-             var options = {
-               skipSeen: false
-             };
-             utilArrayChunk(osmIDs, 150).forEach(function (arr) {
-               that.loadFromAPI('/api/0.6/' + type + '.json?' + type + '=' + arr.join(), function (err, entities) {
-                 if (callback) callback(err, {
-                   data: entities
-                 });
-               }, options);
-             });
-           });
-         },
-         // Create, upload, and close a changeset
-         // PUT /api/0.6/changeset/create
-         // POST /api/0.6/changeset/#id/upload
-         // PUT /api/0.6/changeset/#id/close
-         putChangeset: function putChangeset(changeset, changes, callback) {
-           var cid = _connectionID;
+                     while (i + 1 < l && tokens[i + 1].type === 'text') {
+                       token = tokens[++i];
+                       body += '\n' + (token.tokens ? this.parseInline(token.tokens) : token.text);
+                     }
 
-           if (_changeset.inflight) {
-             return callback({
-               message: 'Changeset already inflight',
-               status: -2
-             }, changeset);
-           } else if (_changeset.open) {
-             // reuse existing open changeset..
-             return createdChangeset.call(this, null, _changeset.open);
-           } else {
-             // Open a new changeset..
-             var options = {
-               method: 'PUT',
-               path: '/api/0.6/changeset/create',
-               options: {
-                 header: {
-                   'Content-Type': 'text/xml'
-                 }
-               },
-               content: JXON.stringify(changeset.asJXON())
-             };
-             _changeset.inflight = oauth.xhr(options, wrapcb(this, createdChangeset, cid));
-           }
+                     out += top ? this.renderer.paragraph(body) : body;
+                     continue;
+                   }
 
-           function createdChangeset(err, changesetID) {
-             _changeset.inflight = null;
+                 default:
+                   {
+                     var errMsg = 'Token with "' + token.type + '" type was not found.';
 
-             if (err) {
-               return callback(err, changeset);
+                     if (this.options.silent) {
+                       console.error(errMsg);
+                       return;
+                     } else {
+                       throw new Error(errMsg);
+                     }
+                   }
+               }
              }
 
-             _changeset.open = changesetID;
-             changeset = changeset.update({
-               id: changesetID
-             }); // Upload the changeset..
-
-             var options = {
-               method: 'POST',
-               path: '/api/0.6/changeset/' + changesetID + '/upload',
-               options: {
-                 header: {
-                   'Content-Type': 'text/xml'
-                 }
-               },
-               content: JXON.stringify(changeset.osmChangeJXON(changes))
-             };
-             _changeset.inflight = oauth.xhr(options, wrapcb(this, uploadedChangeset, cid));
+             return out;
            }
+           /**
+            * Parse Inline Tokens
+            */
 
-           function uploadedChangeset(err) {
-             _changeset.inflight = null;
-             if (err) return callback(err, changeset); // Upload was successful, safe to call the callback.
-             // Add delay to allow for postgres replication #1646 #2678
+         }, {
+           key: "parseInline",
+           value: function parseInline(tokens, renderer) {
+             renderer = renderer || this.renderer;
+             var out = '',
+                 i,
+                 token;
+             var l = tokens.length;
 
-             window.setTimeout(function () {
-               callback(null, changeset);
-             }, 2500);
-             _changeset.open = null; // At this point, we don't really care if the connection was switched..
-             // Only try to close the changeset if we're still talking to the same server.
+             for (i = 0; i < l; i++) {
+               token = tokens[i];
 
-             if (this.getConnectionId() === cid) {
-               // Still attempt to close changeset, but ignore response because #2667
-               oauth.xhr({
-                 method: 'PUT',
-                 path: '/api/0.6/changeset/' + changeset.id + '/close',
-                 options: {
-                   header: {
-                     'Content-Type': 'text/xml'
+               switch (token.type) {
+                 case 'escape':
+                   {
+                     out += renderer.text(token.text);
+                     break;
                    }
-                 }
-               }, function () {
-                 return true;
-               });
-             }
-           }
-         },
-         // Load multiple users in chunks
-         // (note: callback may be called multiple times)
-         // GET /api/0.6/users?users=#id1,#id2,...,#idn
-         loadUsers: function loadUsers(uids, callback) {
-           var toLoad = [];
-           var cached = [];
-           utilArrayUniq(uids).forEach(function (uid) {
-             if (_userCache.user[uid]) {
-               delete _userCache.toLoad[uid];
-               cached.push(_userCache.user[uid]);
-             } else {
-               toLoad.push(uid);
-             }
-           });
 
-           if (cached.length || !this.authenticated()) {
-             callback(undefined, cached);
-             if (!this.authenticated()) return; // require auth
-           }
+                 case 'html':
+                   {
+                     out += renderer.html(token.text);
+                     break;
+                   }
 
-           utilArrayChunk(toLoad, 150).forEach(function (arr) {
-             oauth.xhr({
-               method: 'GET',
-               path: '/api/0.6/users?users=' + arr.join()
-             }, wrapcb(this, done, _connectionID));
-           }.bind(this));
+                 case 'link':
+                   {
+                     out += renderer.link(token.href, token.title, this.parseInline(token.tokens, renderer));
+                     break;
+                   }
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+                 case 'image':
+                   {
+                     out += renderer.image(token.href, token.title, token.text);
+                     break;
+                   }
 
-             var options = {
-               skipSeen: true
-             };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 return callback(undefined, results);
-               }
-             }, options);
-           }
-         },
-         // Load a given user by id
-         // GET /api/0.6/user/#id
-         loadUser: function loadUser(uid, callback) {
-           if (_userCache.user[uid] || !this.authenticated()) {
-             // require auth
-             delete _userCache.toLoad[uid];
-             return callback(undefined, _userCache.user[uid]);
-           }
+                 case 'strong':
+                   {
+                     out += renderer.strong(this.parseInline(token.tokens, renderer));
+                     break;
+                   }
 
-           oauth.xhr({
-             method: 'GET',
-             path: '/api/0.6/user/' + uid
-           }, wrapcb(this, done, _connectionID));
+                 case 'em':
+                   {
+                     out += renderer.em(this.parseInline(token.tokens, renderer));
+                     break;
+                   }
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+                 case 'codespan':
+                   {
+                     out += renderer.codespan(token.text);
+                     break;
+                   }
 
-             var options = {
-               skipSeen: true
-             };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 return callback(undefined, results[0]);
-               }
-             }, options);
-           }
-         },
-         // Load the details of the logged-in user
-         // GET /api/0.6/user/details
-         userDetails: function userDetails(callback) {
-           if (_userDetails) {
-             // retrieve cached
-             return callback(undefined, _userDetails);
-           }
+                 case 'br':
+                   {
+                     out += renderer.br();
+                     break;
+                   }
 
-           oauth.xhr({
-             method: 'GET',
-             path: '/api/0.6/user/details'
-           }, wrapcb(this, done, _connectionID));
+                 case 'del':
+                   {
+                     out += renderer.del(this.parseInline(token.tokens, renderer));
+                     break;
+                   }
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+                 case 'text':
+                   {
+                     out += renderer.text(token.text);
+                     break;
+                   }
 
-             var options = {
-               skipSeen: false
-             };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 _userDetails = results[0];
-                 return callback(undefined, _userDetails);
+                 default:
+                   {
+                     var errMsg = 'Token with "' + token.type + '" type was not found.';
+
+                     if (this.options.silent) {
+                       console.error(errMsg);
+                       return;
+                     } else {
+                       throw new Error(errMsg);
+                     }
+                   }
                }
-             }, options);
+             }
+
+             return out;
            }
-         },
-         // Load previous changesets for the logged in user
-         // GET /api/0.6/changesets?user=#id
-         userChangesets: function userChangesets(callback) {
-           if (_userChangesets) {
-             // retrieve cached
-             return callback(undefined, _userChangesets);
+         }], [{
+           key: "parse",
+           value: function parse(tokens, options) {
+             var parser = new Parser(options);
+             return parser.parse(tokens);
            }
+           /**
+            * Static Parse Inline Method
+            */
 
-           this.userDetails(wrapcb(this, gotDetails, _connectionID));
+         }, {
+           key: "parseInline",
+           value: function parseInline(tokens, options) {
+             var parser = new Parser(options);
+             return parser.parseInline(tokens);
+           }
+         }]);
 
-           function gotDetails(err, user) {
-             if (err) {
-               return callback(err);
-             }
+         return Parser;
+       }();
 
-             oauth.xhr({
-               method: 'GET',
-               path: '/api/0.6/changesets?user=' + user.id
-             }, wrapcb(this, done, _connectionID));
-           }
+       var Lexer = Lexer_1;
+       var Parser = Parser_1;
+       var Tokenizer = Tokenizer_1;
+       var Renderer = Renderer_1;
+       var TextRenderer = TextRenderer_1;
+       var Slugger = Slugger_1;
+       var merge = helpers.merge,
+           checkSanitizeDeprecation = helpers.checkSanitizeDeprecation,
+           escape$1 = helpers.escape;
+       var getDefaults = defaults$5.exports.getDefaults,
+           changeDefaults = defaults$5.exports.changeDefaults,
+           defaults = defaults$5.exports.defaults;
+       /**
+        * Marked
+        */
 
-           function done(err, xml) {
-             if (err) {
-               return callback(err);
-             }
+       function marked(src, opt, callback) {
+         // throw error in case of non string input
+         if (typeof src === 'undefined' || src === null) {
+           throw new Error('marked(): input parameter is undefined or null');
+         }
 
-             _userChangesets = Array.prototype.map.call(xml.getElementsByTagName('changeset'), function (changeset) {
-               return {
-                 tags: getTags(changeset)
-               };
-             }).filter(function (changeset) {
-               var comment = changeset.tags.comment;
-               return comment && comment !== '';
-             });
-             return callback(undefined, _userChangesets);
-           }
-         },
-         // Fetch the status of the OSM API
-         // GET /api/capabilities
-         status: function status(callback) {
-           var url = urlroot + '/api/capabilities';
-           var errback = wrapcb(this, done, _connectionID);
-           d3_xml(url).then(function (data) {
-             errback(null, data);
-           })["catch"](function (err) {
-             errback(err.message);
-           });
+         if (typeof src !== 'string') {
+           throw new Error('marked(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+         }
 
-           function done(err, xml) {
-             if (err) {
-               // the status is null if no response could be retrieved
-               return callback(err, null);
-             } // update blocklists
+         if (typeof opt === 'function') {
+           callback = opt;
+           opt = null;
+         }
 
+         opt = merge({}, marked.defaults, opt || {});
+         checkSanitizeDeprecation(opt);
 
-             var elements = xml.getElementsByTagName('blacklist');
-             var regexes = [];
+         if (callback) {
+           var highlight = opt.highlight;
+           var tokens;
+
+           try {
+             tokens = Lexer.lex(src, opt);
+           } catch (e) {
+             return callback(e);
+           }
 
-             for (var i = 0; i < elements.length; i++) {
-               var regexString = elements[i].getAttribute('regex'); // needs unencode?
+           var done = function done(err) {
+             var out;
 
-               if (regexString) {
-                 try {
-                   var regex = new RegExp(regexString);
-                   regexes.push(regex);
-                 } catch (e) {
-                   /* noop */
+             if (!err) {
+               try {
+                 if (opt.walkTokens) {
+                   marked.walkTokens(tokens, opt.walkTokens);
                  }
+
+                 out = Parser.parse(tokens, opt);
+               } catch (e) {
+                 err = e;
                }
              }
 
-             if (regexes.length) {
-               _imageryBlocklists = regexes;
-             }
+             opt.highlight = highlight;
+             return err ? callback(err) : callback(null, out);
+           };
 
-             if (_rateLimitError) {
-               return callback(_rateLimitError, 'rateLimited');
-             } else {
-               var waynodes = xml.getElementsByTagName('waynodes');
-               var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
-               if (maxWayNodes && isFinite(maxWayNodes)) _maxWayNodes = maxWayNodes;
-               var apiStatus = xml.getElementsByTagName('status');
-               var val = apiStatus[0].getAttribute('api');
-               return callback(undefined, val);
-             }
-           }
-         },
-         // Calls `status` and dispatches an `apiStatusChange` event if the returned
-         // status differs from the cached status.
-         reloadApiStatus: function reloadApiStatus() {
-           // throttle to avoid unnecessary API calls
-           if (!this.throttledReloadApiStatus) {
-             var that = this;
-             this.throttledReloadApiStatus = throttle(function () {
-               that.status(function (err, status) {
-                 if (status !== _cachedApiStatus) {
-                   _cachedApiStatus = status;
-                   dispatch$6.call('apiStatusChange', that, err, status);
-                 }
-               });
-             }, 500);
+           if (!highlight || highlight.length < 3) {
+             return done();
            }
 
-           this.throttledReloadApiStatus();
-         },
-         // Returns the maximum number of nodes a single way can have
-         maxWayNodes: function maxWayNodes() {
-           return _maxWayNodes;
-         },
-         // Load data (entities) from the API in tiles
-         // GET /api/0.6/map?bbox=
-         loadTiles: function loadTiles(projection, callback) {
-           if (_off) return; // determine the needed tiles to cover the view
+           delete opt.highlight;
+           if (!tokens.length) return done();
+           var pending = 0;
+           marked.walkTokens(tokens, function (token) {
+             if (token.type === 'code') {
+               pending++;
+               setTimeout(function () {
+                 highlight(token.text, token.lang, function (err, code) {
+                   if (err) {
+                     return done(err);
+                   }
 
-           var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection); // abort inflight requests that are no longer needed
+                   if (code != null && code !== token.text) {
+                     token.text = code;
+                     token.escaped = true;
+                   }
 
-           var hadRequests = hasInflightRequests(_tileCache);
-           abortUnwantedRequests$3(_tileCache, tiles);
+                   pending--;
 
-           if (hadRequests && !hasInflightRequests(_tileCache)) {
-             dispatch$6.call('loaded'); // stop the spinner
-           } // issue new requests..
+                   if (pending === 0) {
+                     done();
+                   }
+                 });
+               }, 0);
+             }
+           });
 
+           if (pending === 0) {
+             done();
+           }
 
-           tiles.forEach(function (tile) {
-             this.loadTile(tile, callback);
-           }, this);
-         },
-         // Load a single data tile
-         // GET /api/0.6/map?bbox=
-         loadTile: function loadTile(tile, callback) {
-           if (_off) return;
-           if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
+           return;
+         }
 
-           if (!hasInflightRequests(_tileCache)) {
-             dispatch$6.call('loading'); // start the spinner
-           }
+         try {
+           var _tokens = Lexer.lex(src, opt);
 
-           var path = '/api/0.6/map.json?bbox=';
-           var options = {
-             skipSeen: true
-           };
-           _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
+           if (opt.walkTokens) {
+             marked.walkTokens(_tokens, opt.walkTokens);
+           }
 
-           function tileCallback(err, parsed) {
-             delete _tileCache.inflight[tile.id];
+           return Parser.parse(_tokens, opt);
+         } catch (e) {
+           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-             if (!err) {
-               delete _tileCache.toLoad[tile.id];
-               _tileCache.loaded[tile.id] = true;
-               var bbox = tile.extent.bbox();
-               bbox.id = tile.id;
+           if (opt.silent) {
+             return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+           }
 
-               _tileCache.rtree.insert(bbox);
-             }
+           throw e;
+         }
+       }
+       /**
+        * Options
+        */
 
-             if (callback) {
-               callback(err, Object.assign({
-                 data: parsed
-               }, tile));
-             }
 
-             if (!hasInflightRequests(_tileCache)) {
-               dispatch$6.call('loaded'); // stop the spinner
-             }
-           }
-         },
-         isDataLoaded: function isDataLoaded(loc) {
-           var bbox = {
-             minX: loc[0],
-             minY: loc[1],
-             maxX: loc[0],
-             maxY: loc[1]
-           };
-           return _tileCache.rtree.collides(bbox);
-         },
-         // load the tile that covers the given `loc`
-         loadTileAtLoc: function loadTileAtLoc(loc, callback) {
-           // Back off if the toLoad queue is filling up.. re #6417
-           // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
-           // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
-           if (Object.keys(_tileCache.toLoad).length > 50) return;
-           var k = geoZoomToScale(_tileZoom$3 + 1);
-           var offset = geoRawMercator().scale(k)(loc);
-           var projection = geoRawMercator().transform({
-             k: k,
-             x: -offset[0],
-             y: -offset[1]
-           });
-           var tiles = tiler$5.zoomExtent([_tileZoom$3, _tileZoom$3]).getTiles(projection);
-           tiles.forEach(function (tile) {
-             if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
-             _tileCache.toLoad[tile.id] = true;
-             this.loadTile(tile, callback);
-           }, this);
-         },
-         // Load notes from the API in tiles
-         // GET /api/0.6/notes?bbox=
-         loadNotes: function loadNotes(projection, noteOptions) {
-           noteOptions = Object.assign({
-             limit: 10000,
-             closed: 7
-           }, noteOptions);
-           if (_off) return;
-           var that = this;
-           var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
+       marked.options = marked.setOptions = function (opt) {
+         merge(marked.defaults, opt);
+         changeDefaults(marked.defaults);
+         return marked;
+       };
 
-           var throttleLoadUsers = throttle(function () {
-             var uids = Object.keys(_userCache.toLoad);
-             if (!uids.length) return;
-             that.loadUsers(uids, function () {}); // eagerly load user details
-           }, 750); // determine the needed tiles to cover the view
+       marked.getDefaults = getDefaults;
+       marked.defaults = defaults;
+       /**
+        * Use Extension
+        */
 
+       marked.use = function (extension) {
+         var opts = merge({}, extension);
 
-           var tiles = tiler$5.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
+         if (extension.renderer) {
+           (function () {
+             var renderer = marked.defaults.renderer || new Renderer();
 
-           abortUnwantedRequests$3(_noteCache, tiles); // issue new requests..
+             var _loop = function _loop(prop) {
+               var prevRenderer = renderer[prop];
 
-           tiles.forEach(function (tile) {
-             if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) return;
-             var options = {
-               skipSeen: false
-             };
-             _noteCache.inflight[tile.id] = that.loadFromAPI(path + tile.extent.toParam(), function (err) {
-               delete _noteCache.inflight[tile.id];
+               renderer[prop] = function () {
+                 for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
+                   args[_key] = arguments[_key];
+                 }
 
-               if (!err) {
-                 _noteCache.loaded[tile.id] = true;
-               }
+                 var ret = extension.renderer[prop].apply(renderer, args);
 
-               throttleLoadUsers();
-               dispatch$6.call('loadedNotes');
-             }, options);
-           });
-         },
-         // Create a note
-         // POST /api/0.6/notes?params
-         postNoteCreate: function postNoteCreate(note, callback) {
-           if (!this.authenticated()) {
-             return callback({
-               message: 'Not Authenticated',
-               status: -3
-             }, note);
-           }
+                 if (ret === false) {
+                   ret = prevRenderer.apply(renderer, args);
+                 }
 
-           if (_noteCache.inflightPost[note.id]) {
-             return callback({
-               message: 'Note update already inflight',
-               status: -2
-             }, note);
-           }
+                 return ret;
+               };
+             };
 
-           if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
+             for (var prop in extension.renderer) {
+               _loop(prop);
+             }
 
-           var comment = note.newComment;
+             opts.renderer = renderer;
+           })();
+         }
 
-           if (note.newCategory && note.newCategory !== 'None') {
-             comment += ' #' + note.newCategory;
-           }
+         if (extension.tokenizer) {
+           (function () {
+             var tokenizer = marked.defaults.tokenizer || new Tokenizer();
 
-           var path = '/api/0.6/notes?' + utilQsString({
-             lon: note.loc[0],
-             lat: note.loc[1],
-             text: comment
-           });
-           _noteCache.inflightPost[note.id] = oauth.xhr({
-             method: 'POST',
-             path: path
-           }, wrapcb(this, done, _connectionID));
+             var _loop2 = function _loop2(prop) {
+               var prevTokenizer = tokenizer[prop];
 
-           function done(err, xml) {
-             delete _noteCache.inflightPost[note.id];
+               tokenizer[prop] = function () {
+                 for (var _len2 = arguments.length, args = new Array(_len2), _key2 = 0; _key2 < _len2; _key2++) {
+                   args[_key2] = arguments[_key2];
+                 }
 
-             if (err) {
-               return callback(err);
-             } // we get the updated note back, remove from caches and reparse..
+                 var ret = extension.tokenizer[prop].apply(tokenizer, args);
 
+                 if (ret === false) {
+                   ret = prevTokenizer.apply(tokenizer, args);
+                 }
 
-             this.removeNote(note);
-             var options = {
-               skipSeen: false
+                 return ret;
+               };
              };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 return callback(undefined, results[0]);
-               }
-             }, options);
-           }
-         },
-         // Update a note
-         // POST /api/0.6/notes/#id/comment?text=comment
-         // POST /api/0.6/notes/#id/close?text=comment
-         // POST /api/0.6/notes/#id/reopen?text=comment
-         postNoteUpdate: function postNoteUpdate(note, newStatus, callback) {
-           if (!this.authenticated()) {
-             return callback({
-               message: 'Not Authenticated',
-               status: -3
-             }, note);
-           }
 
-           if (_noteCache.inflightPost[note.id]) {
-             return callback({
-               message: 'Note update already inflight',
-               status: -2
-             }, note);
-           }
+             for (var prop in extension.tokenizer) {
+               _loop2(prop);
+             }
 
-           var action;
+             opts.tokenizer = tokenizer;
+           })();
+         }
 
-           if (note.status !== 'closed' && newStatus === 'closed') {
-             action = 'close';
-           } else if (note.status !== 'open' && newStatus === 'open') {
-             action = 'reopen';
-           } else {
-             action = 'comment';
-             if (!note.newComment) return; // when commenting, comment required
-           }
+         if (extension.walkTokens) {
+           var walkTokens = marked.defaults.walkTokens;
 
-           var path = '/api/0.6/notes/' + note.id + '/' + action;
+           opts.walkTokens = function (token) {
+             extension.walkTokens(token);
 
-           if (note.newComment) {
-             path += '?' + utilQsString({
-               text: note.newComment
-             });
-           }
+             if (walkTokens) {
+               walkTokens(token);
+             }
+           };
+         }
 
-           _noteCache.inflightPost[note.id] = oauth.xhr({
-             method: 'POST',
-             path: path
-           }, wrapcb(this, done, _connectionID));
+         marked.setOptions(opts);
+       };
+       /**
+        * Run callback for every token
+        */
 
-           function done(err, xml) {
-             delete _noteCache.inflightPost[note.id];
 
-             if (err) {
-               return callback(err);
-             } // we get the updated note back, remove from caches and reparse..
+       marked.walkTokens = function (tokens, callback) {
+         var _iterator = _createForOfIteratorHelper(tokens),
+             _step;
 
+         try {
+           for (_iterator.s(); !(_step = _iterator.n()).done;) {
+             var token = _step.value;
+             callback(token);
 
-             this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
+             switch (token.type) {
+               case 'table':
+                 {
+                   var _iterator2 = _createForOfIteratorHelper(token.tokens.header),
+                       _step2;
 
-             if (action === 'close') {
-               _noteCache.closed[note.id] = true;
-             } else if (action === 'reopen') {
-               delete _noteCache.closed[note.id];
-             }
+                   try {
+                     for (_iterator2.s(); !(_step2 = _iterator2.n()).done;) {
+                       var cell = _step2.value;
+                       marked.walkTokens(cell, callback);
+                     }
+                   } catch (err) {
+                     _iterator2.e(err);
+                   } finally {
+                     _iterator2.f();
+                   }
 
-             var options = {
-               skipSeen: false
-             };
-             return parseXML(xml, function (err, results) {
-               if (err) {
-                 return callback(err);
-               } else {
-                 return callback(undefined, results[0]);
-               }
-             }, options);
-           }
-         },
-         "switch": function _switch(options) {
-           urlroot = options.urlroot;
-           oauth.options(Object.assign({
-             url: urlroot,
-             loading: authLoading,
-             done: authDone
-           }, options));
-           this.reset();
-           this.userChangesets(function () {}); // eagerly load user details/changesets
+                   var _iterator3 = _createForOfIteratorHelper(token.tokens.cells),
+                       _step3;
 
-           dispatch$6.call('change');
-           return this;
-         },
-         toggle: function toggle(val) {
-           _off = !val;
-           return this;
-         },
-         isChangesetInflight: function isChangesetInflight() {
-           return !!_changeset.inflight;
-         },
-         // get/set cached data
-         // This is used to save/restore the state when entering/exiting the walkthrough
-         // Also used for testing purposes.
-         caches: function caches(obj) {
-           function cloneCache(source) {
-             var target = {};
-             Object.keys(source).forEach(function (k) {
-               if (k === 'rtree') {
-                 target.rtree = new RBush().fromJSON(source.rtree.toJSON()); // clone rbush
-               } else if (k === 'note') {
-                 target.note = {};
-                 Object.keys(source.note).forEach(function (id) {
-                   target.note[id] = osmNote(source.note[id]); // copy notes
-                 });
-               } else {
-                 target[k] = JSON.parse(JSON.stringify(source[k])); // clone deep
-               }
-             });
-             return target;
-           }
+                   try {
+                     for (_iterator3.s(); !(_step3 = _iterator3.n()).done;) {
+                       var row = _step3.value;
 
-           if (!arguments.length) {
-             return {
-               tile: cloneCache(_tileCache),
-               note: cloneCache(_noteCache),
-               user: cloneCache(_userCache)
-             };
-           } // access caches directly for testing (e.g., loading notes rtree)
+                       var _iterator4 = _createForOfIteratorHelper(row),
+                           _step4;
 
+                       try {
+                         for (_iterator4.s(); !(_step4 = _iterator4.n()).done;) {
+                           var _cell = _step4.value;
+                           marked.walkTokens(_cell, callback);
+                         }
+                       } catch (err) {
+                         _iterator4.e(err);
+                       } finally {
+                         _iterator4.f();
+                       }
+                     }
+                   } catch (err) {
+                     _iterator3.e(err);
+                   } finally {
+                     _iterator3.f();
+                   }
 
-           if (obj === 'get') {
-             return {
-               tile: _tileCache,
-               note: _noteCache,
-               user: _userCache
-             };
-           }
+                   break;
+                 }
 
-           if (obj.tile) {
-             _tileCache = obj.tile;
-             _tileCache.inflight = {};
-           }
+               case 'list':
+                 {
+                   marked.walkTokens(token.items, callback);
+                   break;
+                 }
 
-           if (obj.note) {
-             _noteCache = obj.note;
-             _noteCache.inflight = {};
-             _noteCache.inflightPost = {};
+               default:
+                 {
+                   if (token.tokens) {
+                     marked.walkTokens(token.tokens, callback);
+                   }
+                 }
+             }
            }
+         } catch (err) {
+           _iterator.e(err);
+         } finally {
+           _iterator.f();
+         }
+       };
+       /**
+        * Parse Inline
+        */
 
-           if (obj.user) {
-             _userCache = obj.user;
-           }
 
-           return this;
-         },
-         logout: function logout() {
-           _userChangesets = undefined;
-           _userDetails = undefined;
-           oauth.logout();
-           dispatch$6.call('change');
-           return this;
-         },
-         authenticated: function authenticated() {
-           return oauth.authenticated();
-         },
-         authenticate: function authenticate(callback) {
-           var that = this;
-           var cid = _connectionID;
-           _userChangesets = undefined;
-           _userDetails = undefined;
+       marked.parseInline = function (src, opt) {
+         // throw error in case of non string input
+         if (typeof src === 'undefined' || src === null) {
+           throw new Error('marked.parseInline(): input parameter is undefined or null');
+         }
 
-           function done(err, res) {
-             if (err) {
-               if (callback) callback(err);
-               return;
-             }
+         if (typeof src !== 'string') {
+           throw new Error('marked.parseInline(): input parameter is of type ' + Object.prototype.toString.call(src) + ', string expected');
+         }
 
-             if (that.getConnectionId() !== cid) {
-               if (callback) callback({
-                 message: 'Connection Switched',
-                 status: -1
-               });
-               return;
-             }
+         opt = merge({}, marked.defaults, opt || {});
+         checkSanitizeDeprecation(opt);
 
-             _rateLimitError = undefined;
-             dispatch$6.call('change');
-             if (callback) callback(err, res);
-             that.userChangesets(function () {}); // eagerly load user details/changesets
+         try {
+           var tokens = Lexer.lexInline(src, opt);
+
+           if (opt.walkTokens) {
+             marked.walkTokens(tokens, opt.walkTokens);
            }
 
-           return oauth.authenticate(done);
-         },
-         imageryBlocklists: function imageryBlocklists() {
-           return _imageryBlocklists;
-         },
-         tileZoom: function tileZoom(val) {
-           if (!arguments.length) return _tileZoom$3;
-           _tileZoom$3 = val;
-           return this;
-         },
-         // get all cached notes covering the viewport
-         notes: function notes(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-           return _noteCache.rtree.search(bbox).map(function (d) {
-             return d.data;
-           });
-         },
-         // get a single note from the cache
-         getNote: function getNote(id) {
-           return _noteCache.note[id];
-         },
-         // remove a single note from the cache
-         removeNote: function removeNote(note) {
-           if (!(note instanceof osmNote) || !note.id) return;
-           delete _noteCache.note[note.id];
-           updateRtree$3(encodeNoteRtree(note), false); // false = remove
-         },
-         // replace a single note in the cache
-         replaceNote: function replaceNote(note) {
-           if (!(note instanceof osmNote) || !note.id) return;
-           _noteCache.note[note.id] = note;
-           updateRtree$3(encodeNoteRtree(note), true); // true = replace
+           return Parser.parseInline(tokens, opt);
+         } catch (e) {
+           e.message += '\nPlease report this to https://github.com/markedjs/marked.';
 
-           return note;
-         },
-         // Get an array of note IDs closed during this session.
-         // Used to populate `closed:note` changeset tag
-         getClosedIDs: function getClosedIDs() {
-           return Object.keys(_noteCache.closed).sort();
+           if (opt.silent) {
+             return '<p>An error occurred:</p><pre>' + escape$1(e.message + '', true) + '</pre>';
+           }
+
+           throw e;
          }
        };
+       /**
+        * Expose
+        */
 
-       var _apibase = 'https://wiki.openstreetmap.org/w/api.php';
-       var _inflight$1 = {};
-       var _wikibaseCache = {};
-       var _localeIDs = {
-         en: false
-       };
 
-       var debouncedRequest = debounce(request, 500, {
-         leading: false
-       });
+       marked.Parser = Parser;
+       marked.parser = Parser.parse;
+       marked.Renderer = Renderer;
+       marked.TextRenderer = TextRenderer;
+       marked.Lexer = Lexer;
+       marked.lexer = Lexer.lex;
+       marked.Tokenizer = Tokenizer;
+       marked.Slugger = Slugger;
+       marked.parse = marked;
+       var marked_1 = marked;
 
-       function request(url, callback) {
-         if (_inflight$1[url]) return;
-         var controller = new AbortController();
-         _inflight$1[url] = controller;
-         d3_json(url, {
-           signal: controller.signal
-         }).then(function (result) {
-           delete _inflight$1[url];
-           if (callback) callback(null, result);
-         })["catch"](function (err) {
-           delete _inflight$1[url];
-           if (err.name === 'AbortError') return;
-           if (callback) callback(err.message);
-         });
-       }
+       var tiler$4 = utilTiler();
+       var dispatch$5 = dispatch$8('loaded');
+       var _tileZoom$1 = 14;
+       var _osmoseUrlRoot = 'https://osmose.openstreetmap.fr/api/0.3';
+       var _osmoseData = {
+         icons: {},
+         items: []
+       }; // This gets reassigned if reset
 
-       var serviceOsmWikibase = {
-         init: function init() {
-           _inflight$1 = {};
-           _wikibaseCache = {};
-           _localeIDs = {};
-         },
-         reset: function reset() {
-           Object.values(_inflight$1).forEach(function (controller) {
-             controller.abort();
-           });
-           _inflight$1 = {};
-         },
+       var _cache;
 
-         /**
-          * Get the best value for the property, or undefined if not found
-          * @param entity object from wikibase
-          * @param property string e.g. 'P4' for image
-          * @param langCode string e.g. 'fr' for French
-          */
-         claimToValue: function claimToValue(entity, property, langCode) {
-           if (!entity.claims[property]) return undefined;
-           var locale = _localeIDs[langCode];
-           var preferredPick, localePick;
-           entity.claims[property].forEach(function (stmt) {
-             // If exists, use value limited to the needed language (has a qualifier P26 = locale)
-             // Or if not found, use the first value with the "preferred" rank
-             if (!preferredPick && stmt.rank === 'preferred') {
-               preferredPick = stmt;
-             }
+       function abortRequest$4(controller) {
+         if (controller) {
+           controller.abort();
+         }
+       }
 
-             if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
-               localePick = stmt;
-             }
+       function abortUnwantedRequests$1(cache, tiles) {
+         Object.keys(cache.inflightTile).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k === tile.id;
            });
-           var result = localePick || preferredPick;
 
-           if (result) {
-             var datavalue = result.mainsnak.datavalue;
-             return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
-           } else {
-             return undefined;
+           if (!wanted) {
+             abortRequest$4(cache.inflightTile[k]);
+             delete cache.inflightTile[k];
            }
-         },
-
-         /**
-          * Convert monolingual property into a key-value object (language -> value)
-          * @param entity object from wikibase
-          * @param property string e.g. 'P31' for monolingual wiki page title
-          */
-         monolingualClaimToValueObj: function monolingualClaimToValueObj(entity, property) {
-           if (!entity || !entity.claims[property]) return undefined;
-           return entity.claims[property].reduce(function (acc, obj) {
-             var value = obj.mainsnak.datavalue.value;
-             acc[value.language] = value.text;
-             return acc;
-           }, {});
-         },
-         toSitelink: function toSitelink(key, value) {
-           var result = value ? 'Tag:' + key + '=' + value : 'Key:' + key;
-           return result.replace(/_/g, ' ').trim();
-         },
-         //
-         // Pass params object of the form:
-         // {
-         //   key: 'string',
-         //   value: 'string',
-         //   langCode: 'string'
-         // }
-         //
-         getEntity: function getEntity(params, callback) {
-           var doRequest = params.debounce ? debouncedRequest : request;
-           var that = this;
-           var titles = [];
-           var result = {};
-           var rtypeSitelink = params.key === 'type' && params.value ? ('Relation:' + params.value).replace(/_/g, ' ').trim() : false;
-           var keySitelink = params.key ? this.toSitelink(params.key) : false;
-           var tagSitelink = params.key && params.value ? this.toSitelink(params.key, params.value) : false;
-           var localeSitelink;
+         });
+       }
 
-           if (params.langCodes) {
-             params.langCodes.forEach(function (langCode) {
-               if (_localeIDs[langCode] === undefined) {
-                 // If this is the first time we are asking about this locale,
-                 // fetch corresponding entity (if it exists), and cache it.
-                 // If there is no such entry, cache `false` value to avoid re-requesting it.
-                 localeSitelink = ('Locale:' + langCode).replace(/_/g, ' ').trim();
-                 titles.push(localeSitelink);
-               }
-             });
-           }
+       function encodeIssueRtree(d) {
+         return {
+           minX: d.loc[0],
+           minY: d.loc[1],
+           maxX: d.loc[0],
+           maxY: d.loc[1],
+           data: d
+         };
+       } // Replace or remove QAItem from rtree
 
-           if (rtypeSitelink) {
-             if (_wikibaseCache[rtypeSitelink]) {
-               result.rtype = _wikibaseCache[rtypeSitelink];
-             } else {
-               titles.push(rtypeSitelink);
-             }
-           }
 
-           if (keySitelink) {
-             if (_wikibaseCache[keySitelink]) {
-               result.key = _wikibaseCache[keySitelink];
-             } else {
-               titles.push(keySitelink);
-             }
-           }
+       function updateRtree$1(item, replace) {
+         _cache.rtree.remove(item, function (a, b) {
+           return a.data.id === b.data.id;
+         });
 
-           if (tagSitelink) {
-             if (_wikibaseCache[tagSitelink]) {
-               result.tag = _wikibaseCache[tagSitelink];
-             } else {
-               titles.push(tagSitelink);
-             }
-           }
+         if (replace) {
+           _cache.rtree.insert(item);
+         }
+       } // Issues shouldn't obscure each other
 
-           if (!titles.length) {
-             // Nothing to do, we already had everything in the cache
-             return callback(null, result);
-           } // Requesting just the user language code
-           // If backend recognizes the code, it will perform proper fallbacks,
-           // and the result will contain the requested code. If not, all values are returned:
-           // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
-           // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}
 
+       function preventCoincident(loc) {
+         var coincident = false;
 
-           var obj = {
-             action: 'wbgetentities',
-             sites: 'wiki',
-             titles: titles.join('|'),
-             languages: params.langCodes.join('|'),
-             languagefallback: 1,
-             origin: '*',
-             format: 'json' // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
-             // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
-             // formatversion: 2,
+         do {
+           // first time, move marker up. after that, move marker right.
+           var delta = coincident ? [0.00001, 0] : [0, 0.00001];
+           loc = geoVecAdd(loc, delta);
+           var bbox = geoExtent(loc).bbox();
+           coincident = _cache.rtree.search(bbox).length;
+         } while (coincident);
 
-           };
-           var url = _apibase + '?' + utilQsString(obj);
-           doRequest(url, function (err, d) {
-             if (err) {
-               callback(err);
-             } else if (!d.success || d.error) {
-               callback(d.error.messages.map(function (v) {
-                 return v.html['*'];
-               }).join('<br>'));
-             } else {
-               var localeID = false;
-               Object.values(d.entities).forEach(function (res) {
-                 if (res.missing !== '') {
-                   var title = res.sitelinks.wiki.title;
+         return loc;
+       }
 
-                   if (title === rtypeSitelink) {
-                     _wikibaseCache[rtypeSitelink] = res;
-                     result.rtype = res;
-                   } else if (title === keySitelink) {
-                     _wikibaseCache[keySitelink] = res;
-                     result.key = res;
-                   } else if (title === tagSitelink) {
-                     _wikibaseCache[tagSitelink] = res;
-                     result.tag = res;
-                   } else if (title === localeSitelink) {
-                     localeID = res.id;
-                   } else {
-                     console.log('Unexpected title ' + title); // eslint-disable-line no-console
-                   }
-                 }
-               });
+       var serviceOsmose = {
+         title: 'osmose',
+         init: function init() {
+           _mainFileFetcher.get('qa_data').then(function (d) {
+             _osmoseData = d.osmose;
+             _osmoseData.items = Object.keys(d.osmose.icons).map(function (s) {
+               return s.split('-')[0];
+             }).reduce(function (unique, item) {
+               return unique.indexOf(item) !== -1 ? unique : [].concat(_toConsumableArray(unique), [item]);
+             }, []);
+           });
 
-               if (localeSitelink) {
-                 // If locale ID is not found, store false to prevent repeated queries
-                 that.addLocale(params.langCodes[0], localeID);
-               }
+           if (!_cache) {
+             this.reset();
+           }
 
-               callback(null, result);
-             }
-           });
+           this.event = utilRebind(this, dispatch$5, 'on');
          },
-         //
-         // Pass params object of the form:
-         // {
-         //   key: 'string',     // required
-         //   value: 'string'    // optional
-         // }
-         //
-         // Get an result object used to display tag documentation
-         // {
-         //   title:        'string',
-         //   description:  'string',
-         //   editURL:      'string',
-         //   imageURL:     'string',
-         //   wiki:         { title: 'string', text: 'string', url: 'string' }
-         // }
-         //
-         getDocs: function getDocs(params, callback) {
-           var that = this;
-           var langCodes = _mainLocalizer.localeCodes().map(function (code) {
-             return code.toLowerCase();
-           });
-           params.langCodes = langCodes;
-           this.getEntity(params, function (err, data) {
-             if (err) {
-               callback(err);
-               return;
-             }
+         reset: function reset() {
+           var _strings = {};
+           var _colors = {};
 
-             var entity = data.rtype || data.tag || data.key;
+           if (_cache) {
+             Object.values(_cache.inflightTile).forEach(abortRequest$4); // Strings and colors are static and should not be re-populated
 
-             if (!entity) {
-               callback('No entity');
-               return;
-             }
+             _strings = _cache.strings;
+             _colors = _cache.colors;
+           }
 
-             var i;
-             var description;
+           _cache = {
+             data: {},
+             loadedTile: {},
+             inflightTile: {},
+             inflightPost: {},
+             closed: {},
+             rtree: new RBush(),
+             strings: _strings,
+             colors: _colors
+           };
+         },
+         loadIssues: function loadIssues(projection) {
+           var _this = this;
 
-             for (i in langCodes) {
-               var _code = langCodes[i];
+           var params = {
+             // Tiles return a maximum # of issues
+             // So we want to filter our request for only types iD supports
+             item: _osmoseData.items
+           }; // determine the needed tiles to cover the view
 
-               if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
-                 description = entity.descriptions[_code];
-                 break;
-               }
-             }
+           var tiles = tiler$4.zoomExtent([_tileZoom$1, _tileZoom$1]).getTiles(projection); // abort inflight requests that are no longer needed
 
-             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
+           abortUnwantedRequests$1(_cache, tiles); // issue new requests..
 
-             var result = {
-               title: entity.title,
-               description: description ? description.value : '',
-               descriptionLocaleCode: description ? description.language : '',
-               editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
-             }; // add image
+           tiles.forEach(function (tile) {
+             if (_cache.loadedTile[tile.id] || _cache.inflightTile[tile.id]) return;
 
-             if (entity.claims) {
-               var imageroot;
-               var image = that.claimToValue(entity, 'P4', langCodes[0]);
+             var _tile$xyz = _slicedToArray(tile.xyz, 3),
+                 x = _tile$xyz[0],
+                 y = _tile$xyz[1],
+                 z = _tile$xyz[2];
 
-               if (image) {
-                 imageroot = 'https://commons.wikimedia.org/w/index.php';
-               } else {
-                 image = that.claimToValue(entity, 'P28', langCodes[0]);
+             var url = "".concat(_osmoseUrlRoot, "/issues/").concat(z, "/").concat(x, "/").concat(y, ".json?") + utilQsString(params);
+             var controller = new AbortController();
+             _cache.inflightTile[tile.id] = controller;
+             d3_json(url, {
+               signal: controller.signal
+             }).then(function (data) {
+               delete _cache.inflightTile[tile.id];
+               _cache.loadedTile[tile.id] = true;
 
-                 if (image) {
-                   imageroot = 'https://wiki.openstreetmap.org/w/index.php';
-                 }
-               }
+               if (data.features) {
+                 data.features.forEach(function (issue) {
+                   var _issue$properties = issue.properties,
+                       item = _issue$properties.item,
+                       cl = _issue$properties["class"],
+                       id = _issue$properties.uuid;
+                   /* Osmose issues are uniquely identified by a unique
+                     `item` and `class` combination (both integer values) */
 
-               if (imageroot && image) {
-                 result.imageURL = imageroot + '?' + utilQsString({
-                   title: 'Special:Redirect/file/' + image,
-                   width: 400
-                 });
-               }
-             } // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
-             // If neither tag nor key data item contain a wiki page in the needed language nor English,
-             // get the first found wiki page from either the tag or the key item.
+                   var itemType = "".concat(item, "-").concat(cl); // Filter out unsupported issue types (some are too specific or advanced)
 
+                   if (itemType in _osmoseData.icons) {
+                     var loc = issue.geometry.coordinates; // lon, lat
 
-             var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
-             var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
-             var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
-             var wikis = [rtypeWiki, tagWiki, keyWiki];
+                     loc = preventCoincident(loc);
+                     var d = new QAItem(loc, _this, itemType, id, {
+                       item: item
+                     }); // Setting elems here prevents UI detail requests
 
-             for (i in wikis) {
-               var wiki = wikis[i];
+                     if (item === 8300 || item === 8360) {
+                       d.elems = [];
+                     }
 
-               for (var j in langCodes) {
-                 var code = langCodes[j];
-                 var referenceId = langCodes[0].split('-')[0] !== 'en' && code.split('-')[0] === 'en' ? 'inspector.wiki_en_reference' : 'inspector.wiki_reference';
-                 var info = getWikiInfo(wiki, code, referenceId);
+                     _cache.data[d.id] = d;
 
-                 if (info) {
-                   result.wiki = info;
-                   break;
-                 }
+                     _cache.rtree.insert(encodeIssueRtree(d));
+                   }
+                 });
                }
 
-               if (result.wiki) break;
-             }
-
-             callback(null, result); // Helper method to get wiki info if a given language exists
-
-             function getWikiInfo(wiki, langCode, tKey) {
-               if (wiki && wiki[langCode]) {
-                 return {
-                   title: wiki[langCode],
-                   text: tKey,
-                   url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
-                 };
-               }
-             }
+               dispatch$5.call('loaded');
+             })["catch"](function () {
+               delete _cache.inflightTile[tile.id];
+               _cache.loadedTile[tile.id] = true;
+             });
            });
          },
-         addLocale: function addLocale(langCode, qid) {
-           // Makes it easier to unit test
-           _localeIDs[langCode] = qid;
-         },
-         apibase: function apibase(val) {
-           if (!arguments.length) return _apibase;
-           _apibase = val;
-           return this;
-         }
-       };
+         loadIssueDetail: function loadIssueDetail(issue) {
+           var _this2 = this;
 
-       var jsonpCache = {};
-       window.jsonpCache = jsonpCache;
-       function jsonpRequest(url, callback) {
-         var request = {
-           abort: function abort() {}
-         };
+           // Issue details only need to be fetched once
+           if (issue.elems !== undefined) {
+             return Promise.resolve(issue);
+           }
 
-         if (window.JSONP_FIX) {
-           if (window.JSONP_DELAY === 0) {
-             callback(window.JSONP_FIX);
-           } else {
-             var t = window.setTimeout(function () {
-               callback(window.JSONP_FIX);
-             }, window.JSONP_DELAY || 0);
+           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "?langs=").concat(_mainLocalizer.localeCode());
+
+           var cacheDetails = function cacheDetails(data) {
+             // Associated elements used for highlighting
+             // Assign directly for immediate use in the callback
+             issue.elems = data.elems.map(function (e) {
+               return e.type.substring(0, 1) + e.id;
+             }); // Some issues have instance specific detail in a subtitle
+
+             issue.detail = data.subtitle ? marked_1(data.subtitle.auto) : '';
+
+             _this2.replaceItem(issue);
+           };
+
+           return d3_json(url).then(cacheDetails).then(function () {
+             return issue;
+           });
+         },
+         loadStrings: function loadStrings() {
+           var locale = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : _mainLocalizer.localeCode();
+           var items = Object.keys(_osmoseData.icons);
 
-             request.abort = function () {
-               window.clearTimeout(t);
-             };
-           }
+           if (locale in _cache.strings && Object.keys(_cache.strings[locale]).length === items.length) {
+             return Promise.resolve(_cache.strings[locale]);
+           } // May be partially populated already if some requests were successful
 
-           return request;
-         }
 
-         function rand() {
-           var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
-           var c = '';
-           var i = -1;
+           if (!(locale in _cache.strings)) {
+             _cache.strings[locale] = {};
+           } // Only need to cache strings for supported issue types
+           // Using multiple individual item + class requests to reduce fetched data size
 
-           while (++i < 15) {
-             c += chars.charAt(Math.floor(Math.random() * 52));
-           }
 
-           return c;
-         }
+           var allRequests = items.map(function (itemType) {
+             // No need to request data we already have
+             if (itemType in _cache.strings[locale]) return null;
 
-         function create(url) {
-           var e = url.match(/callback=(\w+)/);
-           var c = e ? e[1] : rand();
+             var cacheData = function cacheData(data) {
+               // Bunch of nested single value arrays of objects
+               var _data$categories = _slicedToArray(data.categories, 1),
+                   _data$categories$ = _data$categories[0],
+                   cat = _data$categories$ === void 0 ? {
+                 items: []
+               } : _data$categories$;
 
-           jsonpCache[c] = function (data) {
-             if (jsonpCache[c]) {
-               callback(data);
-             }
+               var _cat$items = _slicedToArray(cat.items, 1),
+                   _cat$items$ = _cat$items[0],
+                   item = _cat$items$ === void 0 ? {
+                 "class": []
+               } : _cat$items$;
 
-             finalize();
-           };
+               var _item$class = _slicedToArray(item["class"], 1),
+                   _item$class$ = _item$class[0],
+                   cl = _item$class$ === void 0 ? null : _item$class$; // If null default value is reached, data wasn't as expected (or was empty)
 
-           function finalize() {
-             delete jsonpCache[c];
-             script.remove();
-           }
 
-           request.abort = finalize;
-           return 'jsonpCache.' + c;
-         }
+               if (!cl) {
+                 /* eslint-disable no-console */
+                 console.log("Osmose strings request (".concat(itemType, ") had unexpected data"));
+                 /* eslint-enable no-console */
 
-         var cb = create(url);
-         var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
-         return request;
-       }
+                 return;
+               } // Cache served item colors to automatically style issue markers later
 
-       var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
-       var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
-       var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
-       var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
-       var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
-       var maxResults$2 = 2000;
-       var tileZoom$2 = 16.5;
-       var tiler$6 = utilTiler().zoomExtent([tileZoom$2, tileZoom$2]).skipNullIsland(true);
-       var dispatch$7 = dispatch('loadedImages', 'viewerChanged');
-       var minHfov = 10; // zoom in degrees:  20, 10, 5
 
-       var maxHfov = 90; // zoom out degrees
+               var itemInt = item.item,
+                   color = item.color;
 
-       var defaultHfov = 45;
-       var _hires = false;
-       var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
+               if (/^#[A-Fa-f0-9]{6}|[A-Fa-f0-9]{3}/.test(color)) {
+                 _cache.colors[itemInt] = color;
+               } // Value of root key will be null if no string exists
+               // If string exists, value is an object with key 'auto' for string
 
-       var _currScene = 0;
 
-       var _ssCache;
+               var title = cl.title,
+                   detail = cl.detail,
+                   fix = cl.fix,
+                   trap = cl.trap; // Osmose titles shouldn't contain markdown
 
-       var _pannellumViewer;
+               var issueStrings = {};
+               if (title) issueStrings.title = title.auto;
+               if (detail) issueStrings.detail = marked_1(detail.auto);
+               if (trap) issueStrings.trap = marked_1(trap.auto);
+               if (fix) issueStrings.fix = marked_1(fix.auto);
+               _cache.strings[locale][itemType] = issueStrings;
+             };
 
-       var _sceneOptions = {
-         showFullscreenCtrl: false,
-         autoLoad: true,
-         compass: true,
-         yaw: 0,
-         minHfov: minHfov,
-         maxHfov: maxHfov,
-         hfov: defaultHfov,
-         type: 'cubemap',
-         cubeMap: []
-       };
+             var _itemType$split = itemType.split('-'),
+                 _itemType$split2 = _slicedToArray(_itemType$split, 2),
+                 item = _itemType$split2[0],
+                 cl = _itemType$split2[1]; // Osmose API falls back to English strings where untranslated or if locale doesn't exist
 
-       var _loadViewerPromise$2;
-       /**
-        * abortRequest().
-        */
 
+             var url = "".concat(_osmoseUrlRoot, "/items/").concat(item, "/class/").concat(cl, "?langs=").concat(locale);
+             return d3_json(url).then(cacheData);
+           }).filter(Boolean);
+           return Promise.all(allRequests).then(function () {
+             return _cache.strings[locale];
+           });
+         },
+         getStrings: function getStrings(itemType) {
+           var locale = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : _mainLocalizer.localeCode();
+           // No need to fallback to English, Osmose API handles this for us
+           return locale in _cache.strings ? _cache.strings[locale][itemType] : {};
+         },
+         getColor: function getColor(itemType) {
+           return itemType in _cache.colors ? _cache.colors[itemType] : '#FFFFFF';
+         },
+         postUpdate: function postUpdate(issue, callback) {
+           var _this3 = this;
 
-       function abortRequest$6(i) {
-         i.abort();
-       }
-       /**
-        * localeTimeStamp().
-        */
+           if (_cache.inflightPost[issue.id]) {
+             return callback({
+               message: 'Issue update already inflight',
+               status: -2
+             }, issue);
+           } // UI sets the status to either 'done' or 'false'
 
 
-       function localeTimestamp(s) {
-         if (!s) return null;
-         var options = {
-           day: 'numeric',
-           month: 'short',
-           year: 'numeric'
-         };
-         var d = new Date(s);
-         if (isNaN(d.getTime())) return null;
-         return d.toLocaleString(_mainLocalizer.localeCode(), options);
-       }
-       /**
-        * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
-        */
+           var url = "".concat(_osmoseUrlRoot, "/issue/").concat(issue.id, "/").concat(issue.newStatus);
+           var controller = new AbortController();
 
+           var after = function after() {
+             delete _cache.inflightPost[issue.id];
 
-       function loadTiles$2(which, url, projection, margin) {
-         var tiles = tiler$6.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
+             _this3.removeItem(issue);
 
-         var cache = _ssCache[which];
-         Object.keys(cache.inflight).forEach(function (k) {
-           var wanted = tiles.find(function (tile) {
-             return k.indexOf(tile.id + ',') === 0;
-           });
+             if (issue.newStatus === 'done') {
+               // Keep track of the number of issues closed per `item` to tag the changeset
+               if (!(issue.item in _cache.closed)) {
+                 _cache.closed[issue.item] = 0;
+               }
 
-           if (!wanted) {
-             abortRequest$6(cache.inflight[k]);
-             delete cache.inflight[k];
-           }
-         });
-         tiles.forEach(function (tile) {
-           return loadNextTilePage$2(which, url, tile);
-         });
-       }
-       /**
-        * loadNextTilePage() load data for the next tile page in line.
-        */
+               _cache.closed[issue.item] += 1;
+             }
 
+             if (callback) callback(null, issue);
+           };
 
-       function loadNextTilePage$2(which, url, tile) {
-         var cache = _ssCache[which];
-         var nextPage = cache.nextPage[tile.id] || 0;
-         var id = tile.id + ',' + String(nextPage);
-         if (cache.loaded[id] || cache.inflight[id]) return;
-         cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
-           cache.loaded[id] = true;
-           delete cache.inflight[id];
-           if (!bubbles) return; // [].shift() removes the first element, some statistics info, not a bubble point
+           _cache.inflightPost[issue.id] = controller;
+           fetch(url, {
+             signal: controller.signal
+           }).then(after)["catch"](function (err) {
+             delete _cache.inflightPost[issue.id];
+             if (callback) callback(err.message);
+           });
+         },
+         // Get all cached QAItems covering the viewport
+         getItems: function getItems(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return _cache.rtree.search(bbox).map(function (d) {
+             return d.data;
+           });
+         },
+         // Get a QAItem from cache
+         // NOTE: Don't change method name until UI v3 is merged
+         getError: function getError(id) {
+           return _cache.data[id];
+         },
+         // get the name of the icon to display for this item
+         getIcon: function getIcon(itemType) {
+           return _osmoseData.icons[itemType];
+         },
+         // Replace a single QAItem in the cache
+         replaceItem: function replaceItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           _cache.data[item.id] = item;
+           updateRtree$1(encodeIssueRtree(item), true); // true = replace
 
-           bubbles.shift();
-           var features = bubbles.map(function (bubble) {
-             if (cache.points[bubble.id]) return null; // skip duplicates
+           return item;
+         },
+         // Remove a single QAItem from the cache
+         removeItem: function removeItem(item) {
+           if (!(item instanceof QAItem) || !item.id) return;
+           delete _cache.data[item.id];
+           updateRtree$1(encodeIssueRtree(item), false); // false = remove
+         },
+         // Used to populate `closed:osmose:*` changeset tags
+         getClosedCounts: function getClosedCounts() {
+           return _cache.closed;
+         },
+         itemURL: function itemURL(item) {
+           return "https://osmose.openstreetmap.fr/en/error/".concat(item.id);
+         }
+       };
 
-             var loc = [bubble.lo, bubble.la];
-             var d = {
-               loc: loc,
-               key: bubble.id,
-               ca: bubble.he,
-               captured_at: bubble.cd,
-               captured_by: 'microsoft',
-               // nbn: bubble.nbn,
-               // pbn: bubble.pbn,
-               // ad: bubble.ad,
-               // rn: bubble.rn,
-               pr: bubble.pr,
-               // previous
-               ne: bubble.ne,
-               // next
-               pano: true,
-               sequenceKey: null
-             };
-             cache.points[bubble.id] = d; // a sequence starts here
+       var ieee754$1 = {};
 
-             if (bubble.pr === undefined) {
-               cache.leaders.push(bubble.id);
-             }
+       /*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
 
-             return {
-               minX: loc[0],
-               minY: loc[1],
-               maxX: loc[0],
-               maxY: loc[1],
-               data: d
-             };
-           }).filter(Boolean);
-           cache.rtree.load(features);
-           connectSequences();
+       ieee754$1.read = function (buffer, offset, isLE, mLen, nBytes) {
+         var e, m;
+         var eLen = nBytes * 8 - mLen - 1;
+         var eMax = (1 << eLen) - 1;
+         var eBias = eMax >> 1;
+         var nBits = -7;
+         var i = isLE ? nBytes - 1 : 0;
+         var d = isLE ? -1 : 1;
+         var s = buffer[offset + i];
+         i += d;
+         e = s & (1 << -nBits) - 1;
+         s >>= -nBits;
+         nBits += eLen;
 
-           if (which === 'bubbles') {
-             dispatch$7.call('loadedImages');
-           }
-         });
-       } // call this sometimes to connect the bubbles into sequences
+         for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
+         m = e & (1 << -nBits) - 1;
+         e >>= -nBits;
+         nBits += mLen;
 
-       function connectSequences() {
-         var cache = _ssCache.bubbles;
-         var keepLeaders = [];
+         for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
 
-         for (var i = 0; i < cache.leaders.length; i++) {
-           var bubble = cache.points[cache.leaders[i]];
-           var seen = {}; // try to make a sequence.. use the key of the leader bubble.
+         if (e === 0) {
+           e = 1 - eBias;
+         } else if (e === eMax) {
+           return m ? NaN : (s ? -1 : 1) * Infinity;
+         } else {
+           m = m + Math.pow(2, mLen);
+           e = e - eBias;
+         }
 
-           var sequence = {
-             key: bubble.key,
-             bubbles: []
-           };
-           var complete = false;
+         return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
+       };
 
-           do {
-             sequence.bubbles.push(bubble);
-             seen[bubble.key] = true;
+       ieee754$1.write = function (buffer, value, offset, isLE, mLen, nBytes) {
+         var e, m, c;
+         var eLen = nBytes * 8 - mLen - 1;
+         var eMax = (1 << eLen) - 1;
+         var eBias = eMax >> 1;
+         var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
+         var i = isLE ? 0 : nBytes - 1;
+         var d = isLE ? 1 : -1;
+         var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
+         value = Math.abs(value);
 
-             if (bubble.ne === undefined) {
-               complete = true;
-             } else {
-               bubble = cache.points[bubble.ne]; // advance to next
-             }
-           } while (bubble && !seen[bubble.key] && !complete);
+         if (isNaN(value) || value === Infinity) {
+           m = isNaN(value) ? 1 : 0;
+           e = eMax;
+         } else {
+           e = Math.floor(Math.log(value) / Math.LN2);
 
-           if (complete) {
-             _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
+           if (value * (c = Math.pow(2, -e)) < 1) {
+             e--;
+             c *= 2;
+           }
 
-             for (var j = 0; j < sequence.bubbles.length; j++) {
-               sequence.bubbles[j].sequenceKey = sequence.key;
-             } // create a GeoJSON LineString
+           if (e + eBias >= 1) {
+             value += rt / c;
+           } else {
+             value += rt * Math.pow(2, 1 - eBias);
+           }
 
+           if (value * c >= 2) {
+             e++;
+             c /= 2;
+           }
 
-             sequence.geojson = {
-               type: 'LineString',
-               properties: {
-                 captured_at: sequence.bubbles[0] ? sequence.bubbles[0].captured_at : null,
-                 captured_by: sequence.bubbles[0] ? sequence.bubbles[0].captured_by : null,
-                 key: sequence.key
-               },
-               coordinates: sequence.bubbles.map(function (d) {
-                 return d.loc;
-               })
-             };
+           if (e + eBias >= eMax) {
+             m = 0;
+             e = eMax;
+           } else if (e + eBias >= 1) {
+             m = (value * c - 1) * Math.pow(2, mLen);
+             e = e + eBias;
            } else {
-             keepLeaders.push(cache.leaders[i]);
+             m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
+             e = 0;
            }
-         } // couldn't complete these, save for later
+         }
 
+         for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
 
-         cache.leaders = keepLeaders;
+         e = e << mLen | m;
+         eLen += mLen;
+
+         for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+
+         buffer[offset + i - d] |= s * 128;
+       };
+
+       var pbf = Pbf;
+       var ieee754 = ieee754$1;
+
+       function Pbf(buf) {
+         this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
+         this.pos = 0;
+         this.type = 0;
+         this.length = this.buf.length;
        }
-       /**
-        * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
-        */
 
+       Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
 
-       function getBubbles(url, tile, callback) {
-         var rect = tile.extent.rectangle();
-         var urlForRequest = url + utilQsString({
-           n: rect[3],
-           s: rect[1],
-           e: rect[2],
-           w: rect[0],
-           c: maxResults$2,
-           appkey: bubbleAppKey,
-           jsCallback: '{callback}'
-         });
-         return jsonpRequest(urlForRequest, function (data) {
-           if (!data || data.error) {
-             callback(null);
-           } else {
-             callback(data);
-           }
-         });
-       } // partition viewport into higher zoom tiles
+       Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
 
+       Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
 
-       function partitionViewport$2(projection) {
-         var z = geoScaleToZoom(projection.scale());
-         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
+       Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
 
-         var tiler = utilTiler().zoomExtent([z2, z2]);
-         return tiler.getTiles(projection).map(function (tile) {
-           return tile.extent;
-         });
-       } // no more than `limit` results per partition.
+       var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
+           SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32; // Threshold chosen based on both benchmarking and knowledge about browser string
+       // data structures (which currently switch structure types at 12 bytes or more)
 
+       var TEXT_DECODER_MIN_LENGTH = 12;
+       var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
+       Pbf.prototype = {
+         destroy: function destroy() {
+           this.buf = null;
+         },
+         // === READING =================================================================
+         readFields: function readFields(readField, result, end) {
+           end = end || this.length;
 
-       function searchLimited$2(limit, projection, rtree) {
-         limit = limit || 5;
-         return partitionViewport$2(projection).reduce(function (result, extent) {
-           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
-             return d.data;
-           });
-           return found.length ? result.concat(found) : result;
-         }, []);
-       }
-       /**
-        * loadImage()
-        */
+           while (this.pos < end) {
+             var val = this.readVarint(),
+                 tag = val >> 3,
+                 startPos = this.pos;
+             this.type = val & 0x7;
+             readField(tag, result, this);
+             if (this.pos === startPos) this.skip(val);
+           }
 
+           return result;
+         },
+         readMessage: function readMessage(readField, result) {
+           return this.readFields(readField, result, this.readVarint() + this.pos);
+         },
+         readFixed32: function readFixed32() {
+           var val = readUInt32(this.buf, this.pos);
+           this.pos += 4;
+           return val;
+         },
+         readSFixed32: function readSFixed32() {
+           var val = readInt32(this.buf, this.pos);
+           this.pos += 4;
+           return val;
+         },
+         // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
+         readFixed64: function readFixed64() {
+           var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+           this.pos += 8;
+           return val;
+         },
+         readSFixed64: function readSFixed64() {
+           var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
+           this.pos += 8;
+           return val;
+         },
+         readFloat: function readFloat() {
+           var val = ieee754.read(this.buf, this.pos, true, 23, 4);
+           this.pos += 4;
+           return val;
+         },
+         readDouble: function readDouble() {
+           var val = ieee754.read(this.buf, this.pos, true, 52, 8);
+           this.pos += 8;
+           return val;
+         },
+         readVarint: function readVarint(isSigned) {
+           var buf = this.buf,
+               val,
+               b;
+           b = buf[this.pos++];
+           val = b & 0x7f;
+           if (b < 0x80) return val;
+           b = buf[this.pos++];
+           val |= (b & 0x7f) << 7;
+           if (b < 0x80) return val;
+           b = buf[this.pos++];
+           val |= (b & 0x7f) << 14;
+           if (b < 0x80) return val;
+           b = buf[this.pos++];
+           val |= (b & 0x7f) << 21;
+           if (b < 0x80) return val;
+           b = buf[this.pos];
+           val |= (b & 0x0f) << 28;
+           return readVarintRemainder(val, isSigned, this);
+         },
+         readVarint64: function readVarint64() {
+           // for compatibility with v2.0.1
+           return this.readVarint(true);
+         },
+         readSVarint: function readSVarint() {
+           var num = this.readVarint();
+           return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
+         },
+         readBoolean: function readBoolean() {
+           return Boolean(this.readVarint());
+         },
+         readString: function readString() {
+           var end = this.readVarint() + this.pos;
+           var pos = this.pos;
+           this.pos = end;
 
-       function loadImage(imgInfo) {
-         return new Promise(function (resolve) {
-           var img = new Image();
+           if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
+             // longer strings are fast with the built-in browser TextDecoder API
+             return readUtf8TextDecoder(this.buf, pos, end);
+           } // short strings are fast with our custom implementation
 
-           img.onload = function () {
-             var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
-             var ctx = canvas.getContext('2d');
-             ctx.drawImage(img, imgInfo.x, imgInfo.y);
-             resolve({
-               imgInfo: imgInfo,
-               status: 'ok'
-             });
-           };
 
-           img.onerror = function () {
-             resolve({
-               data: imgInfo,
-               status: 'error'
-             });
-           };
+           return readUtf8(this.buf, pos, end);
+         },
+         readBytes: function readBytes() {
+           var end = this.readVarint() + this.pos,
+               buffer = this.buf.subarray(this.pos, end);
+           this.pos = end;
+           return buffer;
+         },
+         // verbose for performance reasons; doesn't affect gzipped size
+         readPackedVarint: function readPackedVarint(arr, isSigned) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readVarint(isSigned));
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-           img.setAttribute('crossorigin', '');
-           img.src = imgInfo.url;
-         });
-       }
-       /**
-        * loadCanvas()
-        */
+           while (this.pos < end) {
+             arr.push(this.readVarint(isSigned));
+           }
 
+           return arr;
+         },
+         readPackedSVarint: function readPackedSVarint(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-       function loadCanvas(imageGroup) {
-         return Promise.all(imageGroup.map(loadImage)).then(function (data) {
-           var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
-           var which = {
-             '01': 0,
-             '02': 1,
-             '03': 2,
-             '10': 3,
-             '11': 4,
-             '12': 5
-           };
-           var face = data[0].imgInfo.face;
-           _sceneOptions.cubeMap[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
-           return {
-             status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'
-           };
-         });
-       }
-       /**
-        * loadFaces()
-        */
+           while (this.pos < end) {
+             arr.push(this.readSVarint());
+           }
 
+           return arr;
+         },
+         readPackedBoolean: function readPackedBoolean(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-       function loadFaces(faceGroup) {
-         return Promise.all(faceGroup.map(loadCanvas)).then(function () {
-           return {
-             status: 'loadFaces done'
-           };
-         });
-       }
+           while (this.pos < end) {
+             arr.push(this.readBoolean());
+           }
 
-       function setupCanvas(selection, reset) {
-         if (reset) {
-           selection.selectAll('#ideditor-stitcher-canvases').remove();
-         } // Add the Streetside working canvases. These are used for 'stitching', or combining,
-         // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls
+           return arr;
+         },
+         readPackedFloat: function readPackedFloat(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
+           while (this.pos < end) {
+             arr.push(this.readFloat());
+           }
 
-         selection.selectAll('#ideditor-stitcher-canvases').data([0]).enter().append('div').attr('id', 'ideditor-stitcher-canvases').attr('display', 'none').selectAll('canvas').data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12']).enter().append('canvas').attr('id', function (d) {
-           return 'ideditor-' + d;
-         }).attr('width', _resolution).attr('height', _resolution);
-       }
+           return arr;
+         },
+         readPackedDouble: function readPackedDouble(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-       function qkToXY(qk) {
-         var x = 0;
-         var y = 0;
-         var scale = 256;
+           while (this.pos < end) {
+             arr.push(this.readDouble());
+           }
 
-         for (var i = qk.length; i > 0; i--) {
-           var key = qk[i - 1];
-           x += +(key === '1' || key === '3') * scale;
-           y += +(key === '2' || key === '3') * scale;
-           scale *= 2;
-         }
+           return arr;
+         },
+         readPackedFixed32: function readPackedFixed32(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-         return [x, y];
-       }
+           while (this.pos < end) {
+             arr.push(this.readFixed32());
+           }
 
-       function getQuadKeys() {
-         var dim = _resolution / 256;
-         var quadKeys;
+           return arr;
+         },
+         readPackedSFixed32: function readPackedSFixed32(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-         if (dim === 16) {
-           quadKeys = ['0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001', '1010', '1011', '1100', '1101', '1110', '1111', '0002', '0003', '0012', '0013', '0102', '0103', '0112', '0113', '1002', '1003', '1012', '1013', '1102', '1103', '1112', '1113', '0020', '0021', '0030', '0031', '0120', '0121', '0130', '0131', '1020', '1021', '1030', '1031', '1120', '1121', '1130', '1131', '0022', '0023', '0032', '0033', '0122', '0123', '0132', '0133', '1022', '1023', '1032', '1033', '1122', '1123', '1132', '1133', '0200', '0201', '0210', '0211', '0300', '0301', '0310', '0311', '1200', '1201', '1210', '1211', '1300', '1301', '1310', '1311', '0202', '0203', '0212', '0213', '0302', '0303', '0312', '0313', '1202', '1203', '1212', '1213', '1302', '1303', '1312', '1313', '0220', '0221', '0230', '0231', '0320', '0321', '0330', '0331', '1220', '1221', '1230', '1231', '1320', '1321', '1330', '1331', '0222', '0223', '0232', '0233', '0322', '0323', '0332', '0333', '1222', '1223', '1232', '1233', '1322', '1323', '1332', '1333', '2000', '2001', '2010', '2011', '2100', '2101', '2110', '2111', '3000', '3001', '3010', '3011', '3100', '3101', '3110', '3111', '2002', '2003', '2012', '2013', '2102', '2103', '2112', '2113', '3002', '3003', '3012', '3013', '3102', '3103', '3112', '3113', '2020', '2021', '2030', '2031', '2120', '2121', '2130', '2131', '3020', '3021', '3030', '3031', '3120', '3121', '3130', '3131', '2022', '2023', '2032', '2033', '2122', '2123', '2132', '2133', '3022', '3023', '3032', '3033', '3122', '3123', '3132', '3133', '2200', '2201', '2210', '2211', '2300', '2301', '2310', '2311', '3200', '3201', '3210', '3211', '3300', '3301', '3310', '3311', '2202', '2203', '2212', '2213', '2302', '2303', '2312', '2313', '3202', '3203', '3212', '3213', '3302', '3303', '3312', '3313', '2220', '2221', '2230', '2231', '2320', '2321', '2330', '2331', '3220', '3221', '3230', '3231', '3320', '3321', '3330', '3331', '2222', '2223', '2232', '2233', '2322', '2323', '2332', '2333', '3222', '3223', '3232', '3233', '3322', '3323', '3332', '3333'];
-         } else if (dim === 8) {
-           quadKeys = ['000', '001', '010', '011', '100', '101', '110', '111', '002', '003', '012', '013', '102', '103', '112', '113', '020', '021', '030', '031', '120', '121', '130', '131', '022', '023', '032', '033', '122', '123', '132', '133', '200', '201', '210', '211', '300', '301', '310', '311', '202', '203', '212', '213', '302', '303', '312', '313', '220', '221', '230', '231', '320', '321', '330', '331', '222', '223', '232', '233', '322', '323', '332', '333'];
-         } else if (dim === 4) {
-           quadKeys = ['00', '01', '10', '11', '02', '03', '12', '13', '20', '21', '30', '31', '22', '23', '32', '33'];
-         } else {
-           // dim === 2
-           quadKeys = ['0', '1', '2', '3'];
-         }
+           while (this.pos < end) {
+             arr.push(this.readSFixed32());
+           }
 
-         return quadKeys;
-       }
+           return arr;
+         },
+         readPackedFixed64: function readPackedFixed64(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-       var serviceStreetside = {
-         /**
-          * init() initialize streetside.
-          */
-         init: function init() {
-           if (!_ssCache) {
-             this.reset();
+           while (this.pos < end) {
+             arr.push(this.readFixed64());
            }
 
-           this.event = utilRebind(this, dispatch$7, 'on');
+           return arr;
          },
+         readPackedSFixed64: function readPackedSFixed64(arr) {
+           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
+           var end = readPackedEnd(this);
+           arr = arr || [];
 
-         /**
-          * reset() reset the cache.
-          */
-         reset: function reset() {
-           if (_ssCache) {
-             Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$6);
+           while (this.pos < end) {
+             arr.push(this.readSFixed64());
            }
 
-           _ssCache = {
-             bubbles: {
-               inflight: {},
-               loaded: {},
-               nextPage: {},
-               rtree: new RBush(),
-               points: {},
-               leaders: []
-             },
-             sequences: {}
-           };
+           return arr;
          },
-
-         /**
-          * bubbles()
-          */
-         bubbles: function bubbles(projection) {
-           var limit = 5;
-           return searchLimited$2(limit, projection, _ssCache.bubbles.rtree);
+         skip: function skip(val) {
+           var type = val & 0x7;
+           if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {} else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;else if (type === Pbf.Fixed32) this.pos += 4;else if (type === Pbf.Fixed64) this.pos += 8;else throw new Error('Unimplemented type: ' + type);
          },
-         cachedImage: function cachedImage(imageKey) {
-           return _ssCache.bubbles.points[imageKey];
+         // === WRITING =================================================================
+         writeTag: function writeTag(tag, type) {
+           this.writeVarint(tag << 3 | type);
          },
-         sequences: function sequences(projection) {
-           var viewport = projection.clipExtent();
-           var min = [viewport[0][0], viewport[1][1]];
-           var max = [viewport[1][0], viewport[0][1]];
-           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
-           var seen = {};
-           var results = []; // all sequences for bubbles in viewport
-
-           _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
-             var key = d.data.sequenceKey;
+         realloc: function realloc(min) {
+           var length = this.length || 16;
 
-             if (key && !seen[key]) {
-               seen[key] = true;
-               results.push(_ssCache.sequences[key].geojson);
-             }
-           });
+           while (length < this.pos + min) {
+             length *= 2;
+           }
 
-           return results;
+           if (length !== this.length) {
+             var buf = new Uint8Array(length);
+             buf.set(this.buf);
+             this.buf = buf;
+             this.length = length;
+           }
          },
-
-         /**
-          * loadBubbles()
-          */
-         loadBubbles: function loadBubbles(projection, margin) {
-           // by default: request 2 nearby tiles so we can connect sequences.
-           if (margin === undefined) margin = 2;
-           loadTiles$2('bubbles', bubbleApi, projection, margin);
+         finish: function finish() {
+           this.length = this.pos;
+           this.pos = 0;
+           return this.buf.subarray(0, this.length);
          },
-         viewer: function viewer() {
-           return _pannellumViewer;
+         writeFixed32: function writeFixed32(val) {
+           this.realloc(4);
+           writeInt32(this.buf, val, this.pos);
+           this.pos += 4;
          },
-         initViewer: function initViewer() {
-           if (!window.pannellum) return;
-           if (_pannellumViewer) return;
-           _currScene += 1;
-
-           var sceneID = _currScene.toString();
-
-           var options = {
-             'default': {
-               firstScene: sceneID
-             },
-             scenes: {}
-           };
-           options.scenes[sceneID] = _sceneOptions;
-           _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
+         writeSFixed32: function writeSFixed32(val) {
+           this.realloc(4);
+           writeInt32(this.buf, val, this.pos);
+           this.pos += 4;
          },
-         ensureViewerLoaded: function ensureViewerLoaded(context) {
-           if (_loadViewerPromise$2) return _loadViewerPromise$2; // create ms-wrapper, a photo wrapper class
-
-           var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper').data([0]); // inject ms-wrapper into the photoviewer div
-           // (used by all to house each custom photo viewer)
-
-           var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper ms-wrapper').classed('hide', true);
-           var that = this;
-           var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // inject div to support streetside viewer (pannellum) and attribution line
-
-           wrapEnter.append('div').attr('id', 'ideditor-viewer-streetside').on(pointerPrefix + 'down.streetside', function () {
-             select(window).on(pointerPrefix + 'move.streetside', function () {
-               dispatch$7.call('viewerChanged');
-             }, true);
-           }).on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
-             select(window).on(pointerPrefix + 'move.streetside', null); // continue dispatching events for a few seconds, in case viewer has inertia.
-
-             var t = timer(function (elapsed) {
-               dispatch$7.call('viewerChanged');
-
-               if (elapsed > 2000) {
-                 t.stop();
-               }
-             });
-           }).append('div').attr('class', 'photo-attribution fillD');
-           var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
-           controlsEnter.append('button').on('click.back', step(-1)).html('◄');
-           controlsEnter.append('button').on('click.forward', step(1)).html('►'); // create working canvas for stitching together images
+         writeFixed64: function writeFixed64(val) {
+           this.realloc(8);
+           writeInt32(this.buf, val & -1, this.pos);
+           writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+           this.pos += 8;
+         },
+         writeSFixed64: function writeSFixed64(val) {
+           this.realloc(8);
+           writeInt32(this.buf, val & -1, this.pos);
+           writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
+           this.pos += 8;
+         },
+         writeVarint: function writeVarint(val) {
+           val = +val || 0;
 
-           wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
+           if (val > 0xfffffff || val < 0) {
+             writeBigVarint(val, this);
+             return;
+           }
 
-           context.ui().photoviewer.on('resize.streetside', function () {
-             if (_pannellumViewer) {
-               _pannellumViewer.resize();
-             }
-           });
-           _loadViewerPromise$2 = new Promise(function (resolve, reject) {
-             var loadedCount = 0;
+           this.realloc(4);
+           this.buf[this.pos++] = val & 0x7f | (val > 0x7f ? 0x80 : 0);
+           if (val <= 0x7f) return;
+           this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+           if (val <= 0x7f) return;
+           this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
+           if (val <= 0x7f) return;
+           this.buf[this.pos++] = val >>> 7 & 0x7f;
+         },
+         writeSVarint: function writeSVarint(val) {
+           this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
+         },
+         writeBoolean: function writeBoolean(val) {
+           this.writeVarint(Boolean(val));
+         },
+         writeString: function writeString(str) {
+           str = String(str);
+           this.realloc(str.length * 4);
+           this.pos++; // reserve 1 byte for short string length
 
-             function loaded() {
-               loadedCount += 1; // wait until both files are loaded
+           var startPos = this.pos; // write the string directly to the buffer and see how much was written
 
-               if (loadedCount === 2) resolve();
-             }
+           this.pos = writeUtf8(this.buf, str, this.pos);
+           var len = this.pos - startPos;
+           if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
 
-             var head = select('head'); // load streetside pannellum viewer css
+           this.pos = startPos - 1;
+           this.writeVarint(len);
+           this.pos += len;
+         },
+         writeFloat: function writeFloat(val) {
+           this.realloc(4);
+           ieee754.write(this.buf, val, this.pos, true, 23, 4);
+           this.pos += 4;
+         },
+         writeDouble: function writeDouble(val) {
+           this.realloc(8);
+           ieee754.write(this.buf, val, this.pos, true, 52, 8);
+           this.pos += 8;
+         },
+         writeBytes: function writeBytes(buffer) {
+           var len = buffer.length;
+           this.writeVarint(len);
+           this.realloc(len);
 
-             head.selectAll('#ideditor-streetside-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-streetside-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(pannellumViewerCSS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
-               reject();
-             }); // load streetside pannellum viewer js
+           for (var i = 0; i < len; i++) {
+             this.buf[this.pos++] = buffer[i];
+           }
+         },
+         writeRawMessage: function writeRawMessage(fn, obj) {
+           this.pos++; // reserve 1 byte for short message length
+           // write the message directly to the buffer and see how much was written
 
-             head.selectAll('#ideditor-streetside-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-streetside-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(pannellumViewerJS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
-               reject();
-             });
-           })["catch"](function () {
-             _loadViewerPromise$2 = null;
-           });
-           return _loadViewerPromise$2;
+           var startPos = this.pos;
+           fn(obj, this);
+           var len = this.pos - startPos;
+           if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
 
-           function step(stepBy) {
-             return function () {
-               var viewer = context.container().select('.photoviewer');
-               var selected = viewer.empty() ? undefined : viewer.datum();
-               if (!selected) return;
-               var nextID = stepBy === 1 ? selected.ne : selected.pr;
+           this.pos = startPos - 1;
+           this.writeVarint(len);
+           this.pos += len;
+         },
+         writeMessage: function writeMessage(tag, fn, obj) {
+           this.writeTag(tag, Pbf.Bytes);
+           this.writeRawMessage(fn, obj);
+         },
+         writePackedVarint: function writePackedVarint(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedVarint, arr);
+         },
+         writePackedSVarint: function writePackedSVarint(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedSVarint, arr);
+         },
+         writePackedBoolean: function writePackedBoolean(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedBoolean, arr);
+         },
+         writePackedFloat: function writePackedFloat(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedFloat, arr);
+         },
+         writePackedDouble: function writePackedDouble(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedDouble, arr);
+         },
+         writePackedFixed32: function writePackedFixed32(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedFixed, arr);
+         },
+         writePackedSFixed32: function writePackedSFixed32(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedSFixed, arr);
+         },
+         writePackedFixed64: function writePackedFixed64(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedFixed2, arr);
+         },
+         writePackedSFixed64: function writePackedSFixed64(tag, arr) {
+           if (arr.length) this.writeMessage(tag, _writePackedSFixed2, arr);
+         },
+         writeBytesField: function writeBytesField(tag, buffer) {
+           this.writeTag(tag, Pbf.Bytes);
+           this.writeBytes(buffer);
+         },
+         writeFixed32Field: function writeFixed32Field(tag, val) {
+           this.writeTag(tag, Pbf.Fixed32);
+           this.writeFixed32(val);
+         },
+         writeSFixed32Field: function writeSFixed32Field(tag, val) {
+           this.writeTag(tag, Pbf.Fixed32);
+           this.writeSFixed32(val);
+         },
+         writeFixed64Field: function writeFixed64Field(tag, val) {
+           this.writeTag(tag, Pbf.Fixed64);
+           this.writeFixed64(val);
+         },
+         writeSFixed64Field: function writeSFixed64Field(tag, val) {
+           this.writeTag(tag, Pbf.Fixed64);
+           this.writeSFixed64(val);
+         },
+         writeVarintField: function writeVarintField(tag, val) {
+           this.writeTag(tag, Pbf.Varint);
+           this.writeVarint(val);
+         },
+         writeSVarintField: function writeSVarintField(tag, val) {
+           this.writeTag(tag, Pbf.Varint);
+           this.writeSVarint(val);
+         },
+         writeStringField: function writeStringField(tag, str) {
+           this.writeTag(tag, Pbf.Bytes);
+           this.writeString(str);
+         },
+         writeFloatField: function writeFloatField(tag, val) {
+           this.writeTag(tag, Pbf.Fixed32);
+           this.writeFloat(val);
+         },
+         writeDoubleField: function writeDoubleField(tag, val) {
+           this.writeTag(tag, Pbf.Fixed64);
+           this.writeDouble(val);
+         },
+         writeBooleanField: function writeBooleanField(tag, val) {
+           this.writeVarintField(tag, Boolean(val));
+         }
+       };
 
-               var yaw = _pannellumViewer.getYaw();
+       function readVarintRemainder(l, s, p) {
+         var buf = p.buf,
+             h,
+             b;
+         b = buf[p.pos++];
+         h = (b & 0x70) >> 4;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x7f) << 3;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x7f) << 10;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x7f) << 17;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x7f) << 24;
+         if (b < 0x80) return toNum(l, h, s);
+         b = buf[p.pos++];
+         h |= (b & 0x01) << 31;
+         if (b < 0x80) return toNum(l, h, s);
+         throw new Error('Expected varint not more than 10 bytes');
+       }
 
-               var ca = selected.ca + yaw;
-               var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
+       function readPackedEnd(pbf) {
+         return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
+       }
 
-               var meters = 35;
-               var p1 = [origin[0] + geoMetersToLon(meters / 5, origin[1]), origin[1]];
-               var p2 = [origin[0] + geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
-               var p3 = [origin[0] - geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
-               var p4 = [origin[0] - geoMetersToLon(meters / 5, origin[1]), origin[1]];
-               var poly = [p1, p2, p3, p4, p1]; // rotate it to face forward/backward
+       function toNum(low, high, isSigned) {
+         if (isSigned) {
+           return high * 0x100000000 + (low >>> 0);
+         }
 
-               var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
-               poly = geoRotate(poly, -angle, origin);
-               var extent = poly.reduce(function (extent, point) {
-                 return extent.extend(geoExtent(point));
-               }, geoExtent()); // find nearest other bubble in the search polygon
+         return (high >>> 0) * 0x100000000 + (low >>> 0);
+       }
 
-               var minDist = Infinity;
+       function writeBigVarint(val, pbf) {
+         var low, high;
 
-               _ssCache.bubbles.rtree.search(extent.bbox()).forEach(function (d) {
-                 if (d.data.key === selected.key) return;
-                 if (!geoPointInPolygon(d.data.loc, poly)) return;
-                 var dist = geoVecLength(d.data.loc, selected.loc);
-                 var theta = selected.ca - d.data.ca;
-                 var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
+         if (val >= 0) {
+           low = val % 0x100000000 | 0;
+           high = val / 0x100000000 | 0;
+         } else {
+           low = ~(-val % 0x100000000);
+           high = ~(-val / 0x100000000);
 
-                 if (minTheta > 20) {
-                   dist += 5; // penalize distance if camera angles don't match
-                 }
+           if (low ^ 0xffffffff) {
+             low = low + 1 | 0;
+           } else {
+             low = 0;
+             high = high + 1 | 0;
+           }
+         }
 
-                 if (dist < minDist) {
-                   nextID = d.data.key;
-                   minDist = dist;
-                 }
-               });
+         if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
+           throw new Error('Given varint doesn\'t fit into 10 bytes');
+         }
 
-               var nextBubble = nextID && that.cachedImage(nextID);
-               if (!nextBubble) return;
-               context.map().centerEase(nextBubble.loc);
-               that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
-             };
-           }
-         },
-         yaw: function yaw(_yaw) {
-           if (typeof _yaw !== 'number') return _yaw;
-           _sceneOptions.yaw = _yaw;
-           return this;
-         },
+         pbf.realloc(10);
+         writeBigVarintLow(low, high, pbf);
+         writeBigVarintHigh(high, pbf);
+       }
 
-         /**
-          * showViewer()
-          */
-         showViewer: function showViewer(context) {
-           var wrap = context.container().select('.photoviewer').classed('hide', false);
-           var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
+       function writeBigVarintLow(low, high, pbf) {
+         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+         low >>>= 7;
+         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+         low >>>= 7;
+         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+         low >>>= 7;
+         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
+         low >>>= 7;
+         pbf.buf[pbf.pos] = low & 0x7f;
+       }
 
-           if (isHidden) {
-             wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
-             wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
-           }
+       function writeBigVarintHigh(high, pbf) {
+         var lsb = (high & 0x07) << 4;
+         pbf.buf[pbf.pos++] |= lsb | ((high >>>= 3) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
+         if (!high) return;
+         pbf.buf[pbf.pos++] = high & 0x7f;
+       }
 
-           return this;
-         },
+       function makeRoomForExtraLength(startPos, len, pbf) {
+         var extraLen = len <= 0x3fff ? 1 : len <= 0x1fffff ? 2 : len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7)); // if 1 byte isn't enough for encoding message length, shift the data to the right
 
-         /**
-          * hideViewer()
-          */
-         hideViewer: function hideViewer(context) {
-           var viewer = context.container().select('.photoviewer');
-           if (!viewer.empty()) viewer.datum(null);
-           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
-           context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
-           this.updateUrlImage(null);
-           return this.setStyles(context, null, true);
-         },
+         pbf.realloc(extraLen);
 
-         /**
-          * selectImage().
-          */
-         selectImage: function selectImage(context, key) {
-           var that = this;
-           var d = this.cachedImage(key);
-           var viewer = context.container().select('.photoviewer');
-           if (!viewer.empty()) viewer.datum(d);
-           this.setStyles(context, null, true);
-           var wrap = context.container().select('.photoviewer .ms-wrapper');
-           var attribution = wrap.selectAll('.photo-attribution').html('');
-           wrap.selectAll('.pnlm-load-box') // display "loading.."
-           .style('display', 'block');
-           if (!d) return this;
-           this.updateUrlImage(key);
-           _sceneOptions.northOffset = d.ca;
-           var line1 = attribution.append('div').attr('class', 'attribution-row');
-           var hiresDomId = utilUniqueDomId('streetside-hires'); // Add hires checkbox
+         for (var i = pbf.pos - 1; i >= startPos; i--) {
+           pbf.buf[i + extraLen] = pbf.buf[i];
+         }
+       }
 
-           var label = line1.append('label').attr('for', hiresDomId).attr('class', 'streetside-hires');
-           label.append('input').attr('type', 'checkbox').attr('id', hiresDomId).property('checked', _hires).on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             _hires = !_hires;
-             _resolution = _hires ? 1024 : 512;
-             wrap.call(setupCanvas, true);
-             var viewstate = {
-               yaw: _pannellumViewer.getYaw(),
-               pitch: _pannellumViewer.getPitch(),
-               hfov: _pannellumViewer.getHfov()
-             };
-             _sceneOptions = Object.assign(_sceneOptions, viewstate);
-             that.selectImage(context, d.key).showViewer(context);
-           });
-           label.append('span').html(_t.html('streetside.hires'));
-           var captureInfo = line1.append('div').attr('class', 'attribution-capture-info'); // Add capture date
+       function _writePackedVarint(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeVarint(arr[i]);
+         }
+       }
 
-           if (d.captured_by) {
-             var yyyy = new Date().getFullYear();
-             captureInfo.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://www.microsoft.com/en-us/maps/streetside').html('©' + yyyy + ' Microsoft');
-             captureInfo.append('span').html('|');
-           }
+       function _writePackedSVarint(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSVarint(arr[i]);
+         }
+       }
 
-           if (d.captured_at) {
-             captureInfo.append('span').attr('class', 'captured_at').html(localeTimestamp(d.captured_at));
-           } // Add image links
+       function _writePackedFloat(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFloat(arr[i]);
+         }
+       }
 
+       function _writePackedDouble(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeDouble(arr[i]);
+         }
+       }
 
-           var line2 = attribution.append('div').attr('class', 'attribution-row');
-           line2.append('a').attr('class', 'image-view-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] + '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1').html(_t.html('streetside.view_on_bing'));
-           line2.append('a').attr('class', 'image-report-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' + encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17').html(_t.html('streetside.report'));
-           var bubbleIdQuadKey = d.key.toString(4);
-           var paddingNeeded = 16 - bubbleIdQuadKey.length;
+       function _writePackedBoolean(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeBoolean(arr[i]);
+         }
+       }
 
-           for (var i = 0; i < paddingNeeded; i++) {
-             bubbleIdQuadKey = '0' + bubbleIdQuadKey;
-           }
+       function _writePackedFixed(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFixed32(arr[i]);
+         }
+       }
 
-           var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
-           var imgUrlSuffix = '.jpg?g=6338&n=z'; // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12
+       function _writePackedSFixed(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSFixed32(arr[i]);
+         }
+       }
 
-           var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
+       function _writePackedFixed2(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeFixed64(arr[i]);
+         }
+       }
 
-           var quadKeys = getQuadKeys();
-           var faces = faceKeys.map(function (faceKey) {
-             return quadKeys.map(function (quadKey) {
-               var xy = qkToXY(quadKey);
-               return {
-                 face: faceKey,
-                 url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
-                 x: xy[0],
-                 y: xy[1]
-               };
-             });
-           });
-           loadFaces(faces).then(function () {
-             if (!_pannellumViewer) {
-               that.initViewer();
-             } else {
-               // make a new scene
-               _currScene += 1;
+       function _writePackedSFixed2(arr, pbf) {
+         for (var i = 0; i < arr.length; i++) {
+           pbf.writeSFixed64(arr[i]);
+         }
+       } // Buffer code below from https://github.com/feross/buffer, MIT-licensed
 
-               var sceneID = _currScene.toString();
 
-               _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
+       function readUInt32(buf, pos) {
+         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
+       }
 
+       function writeInt32(buf, val, pos) {
+         buf[pos] = val;
+         buf[pos + 1] = val >>> 8;
+         buf[pos + 2] = val >>> 16;
+         buf[pos + 3] = val >>> 24;
+       }
 
-               if (_currScene > 2) {
-                 sceneID = (_currScene - 1).toString();
+       function readInt32(buf, pos) {
+         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
+       }
 
-                 _pannellumViewer.removeScene(sceneID);
-               }
-             }
-           });
-           return this;
-         },
-         getSequenceKeyForBubble: function getSequenceKeyForBubble(d) {
-           return d && d.sequenceKey;
-         },
-         // Updates the currently highlighted sequence and selected bubble.
-         // Reset is only necessary when interacting with the viewport because
-         // this implicitly changes the currently selected bubble/sequence
-         setStyles: function setStyles(context, hovered, reset) {
-           if (reset) {
-             // reset all layers
-             context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
-             context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
-           }
+       function readUtf8(buf, pos, end) {
+         var str = '';
+         var i = pos;
 
-           var hoveredBubbleKey = hovered && hovered.key;
-           var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
-           var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
-           var hoveredBubbleKeys = hoveredSequence && hoveredSequence.bubbles.map(function (d) {
-             return d.key;
-           }) || [];
-           var viewer = context.container().select('.photoviewer');
-           var selected = viewer.empty() ? undefined : viewer.datum();
-           var selectedBubbleKey = selected && selected.key;
-           var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
-           var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
-           var selectedBubbleKeys = selectedSequence && selectedSequence.bubbles.map(function (d) {
-             return d.key;
-           }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
+         while (i < end) {
+           var b0 = buf[i];
+           var c = null; // codepoint
 
-           var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
-           context.container().selectAll('.layer-streetside-images .viewfield-group').classed('highlighted', function (d) {
-             return highlightedBubbleKeys.indexOf(d.key) !== -1;
-           }).classed('hovered', function (d) {
-             return d.key === hoveredBubbleKey;
-           }).classed('currentView', function (d) {
-             return d.key === selectedBubbleKey;
-           });
-           context.container().selectAll('.layer-streetside-images .sequence').classed('highlighted', function (d) {
-             return d.properties.key === hoveredSequenceKey;
-           }).classed('currentView', function (d) {
-             return d.properties.key === selectedSequenceKey;
-           }); // update viewfields if needed
+           var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
+           if (i + bytesPerSequence > end) break;
+           var b1, b2, b3;
 
-           context.container().selectAll('.viewfield-group .viewfield').attr('d', viewfieldPath);
+           if (bytesPerSequence === 1) {
+             if (b0 < 0x80) {
+               c = b0;
+             }
+           } else if (bytesPerSequence === 2) {
+             b1 = buf[i + 1];
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+             if ((b1 & 0xC0) === 0x80) {
+               c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
 
-             if (d.pano && d.key !== selectedBubbleKey) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-             } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+               if (c <= 0x7F) {
+                 c = null;
+               }
              }
-           }
+           } else if (bytesPerSequence === 3) {
+             b1 = buf[i + 1];
+             b2 = buf[i + 2];
 
-           return this;
-         },
-         updateUrlImage: function updateUrlImage(imageKey) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
+             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
+               c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;
 
-             if (imageKey) {
-               hash.photo = 'streetside/' + imageKey;
-             } else {
-               delete hash.photo;
+               if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
+                 c = null;
+               }
              }
+           } else if (bytesPerSequence === 4) {
+             b1 = buf[i + 1];
+             b2 = buf[i + 2];
+             b3 = buf[i + 3];
 
-             window.location.replace('#' + utilQsString(hash, true));
-           }
-         },
+             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
+               c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;
 
-         /**
-          * cache().
-          */
-         cache: function cache() {
-           return _ssCache;
-         }
-       };
+               if (c <= 0xFFFF || c >= 0x110000) {
+                 c = null;
+               }
+             }
+           }
 
-       var _apibase$1 = 'https://taginfo.openstreetmap.org/api/4/';
-       var _inflight$2 = {};
-       var _popularKeys = {};
-       var _taginfoCache = {};
-       var tag_sorts = {
-         point: 'count_nodes',
-         vertex: 'count_nodes',
-         area: 'count_ways',
-         line: 'count_ways'
-       };
-       var tag_sort_members = {
-         point: 'count_node_members',
-         vertex: 'count_node_members',
-         area: 'count_way_members',
-         line: 'count_way_members',
-         relation: 'count_relation_members'
-       };
-       var tag_filters = {
-         point: 'nodes',
-         vertex: 'nodes',
-         area: 'ways',
-         line: 'ways'
-       };
-       var tag_members_fractions = {
-         point: 'count_node_members_fraction',
-         vertex: 'count_node_members_fraction',
-         area: 'count_way_members_fraction',
-         line: 'count_way_members_fraction',
-         relation: 'count_relation_members_fraction'
-       };
+           if (c === null) {
+             c = 0xFFFD;
+             bytesPerSequence = 1;
+           } else if (c > 0xFFFF) {
+             c -= 0x10000;
+             str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
+             c = 0xDC00 | c & 0x3FF;
+           }
 
-       function sets(params, n, o) {
-         if (params.geometry && o[params.geometry]) {
-           params[n] = o[params.geometry];
+           str += String.fromCharCode(c);
+           i += bytesPerSequence;
          }
 
-         return params;
+         return str;
        }
 
-       function setFilter(params) {
-         return sets(params, 'filter', tag_filters);
+       function readUtf8TextDecoder(buf, pos, end) {
+         return utf8TextDecoder.decode(buf.subarray(pos, end));
        }
 
-       function setSort(params) {
-         return sets(params, 'sortname', tag_sorts);
-       }
+       function writeUtf8(buf, str, pos) {
+         for (var i = 0, c, lead; i < str.length; i++) {
+           c = str.charCodeAt(i); // code point
 
-       function setSortMembers(params) {
-         return sets(params, 'sortname', tag_sort_members);
-       }
+           if (c > 0xD7FF && c < 0xE000) {
+             if (lead) {
+               if (c < 0xDC00) {
+                 buf[pos++] = 0xEF;
+                 buf[pos++] = 0xBF;
+                 buf[pos++] = 0xBD;
+                 lead = c;
+                 continue;
+               } else {
+                 c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
+                 lead = null;
+               }
+             } else {
+               if (c > 0xDBFF || i + 1 === str.length) {
+                 buf[pos++] = 0xEF;
+                 buf[pos++] = 0xBF;
+                 buf[pos++] = 0xBD;
+               } else {
+                 lead = c;
+               }
 
-       function clean(params) {
-         return utilObjectOmit(params, ['geometry', 'debounce']);
-       }
+               continue;
+             }
+           } else if (lead) {
+             buf[pos++] = 0xEF;
+             buf[pos++] = 0xBF;
+             buf[pos++] = 0xBD;
+             lead = null;
+           }
 
-       function filterKeys(type) {
-         var count_type = type ? 'count_' + type : 'count_all';
-         return function (d) {
-           return parseFloat(d[count_type]) > 2500 || d.in_wiki;
-         };
-       }
+           if (c < 0x80) {
+             buf[pos++] = c;
+           } else {
+             if (c < 0x800) {
+               buf[pos++] = c >> 0x6 | 0xC0;
+             } else {
+               if (c < 0x10000) {
+                 buf[pos++] = c >> 0xC | 0xE0;
+               } else {
+                 buf[pos++] = c >> 0x12 | 0xF0;
+                 buf[pos++] = c >> 0xC & 0x3F | 0x80;
+               }
 
-       function filterMultikeys(prefix) {
-         return function (d) {
-           // d.key begins with prefix, and d.key contains no additional ':'s
-           var re = new RegExp('^' + prefix + '(.*)$');
-           var matches = d.key.match(re) || [];
-           return matches.length === 2 && matches[1].indexOf(':') === -1;
-         };
+               buf[pos++] = c >> 0x6 & 0x3F | 0x80;
+             }
+
+             buf[pos++] = c & 0x3F | 0x80;
+           }
+         }
+
+         return pos;
        }
 
-       function filterValues(allowUpperCase) {
-         return function (d) {
-           if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
+       var vectorTile = {};
 
-           if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
+       var pointGeometry = Point$1;
+       /**
+        * A standalone point geometry with useful accessor, comparison, and
+        * modification methods.
+        *
+        * @class Point
+        * @param {Number} x the x-coordinate. this could be longitude or screen
+        * pixels, or any other sort of unit.
+        * @param {Number} y the y-coordinate. this could be latitude or screen
+        * pixels, or any other sort of unit.
+        * @example
+        * var point = new Point(-77, 38);
+        */
 
-           return parseFloat(d.fraction) > 0.0;
-         };
+       function Point$1(x, y) {
+         this.x = x;
+         this.y = y;
        }
 
-       function filterRoles(geometry) {
-         return function (d) {
-           if (d.role === '') return false; // exclude empty role
-
-           if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation
+       Point$1.prototype = {
+         /**
+          * Clone this point, returning a new point that can be modified
+          * without affecting the old one.
+          * @return {Point} the clone
+          */
+         clone: function clone() {
+           return new Point$1(this.x, this.y);
+         },
 
-           return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
-         };
-       }
+         /**
+          * Add this point's x & y coordinates to another point,
+          * yielding a new point.
+          * @param {Point} p the other point
+          * @return {Point} output point
+          */
+         add: function add(p) {
+           return this.clone()._add(p);
+         },
 
-       function valKey(d) {
-         return {
-           value: d.key,
-           title: d.key
-         };
-       }
+         /**
+          * Subtract this point's x & y coordinates to from point,
+          * yielding a new point.
+          * @param {Point} p the other point
+          * @return {Point} output point
+          */
+         sub: function sub(p) {
+           return this.clone()._sub(p);
+         },
 
-       function valKeyDescription(d) {
-         var obj = {
-           value: d.value,
-           title: d.description || d.value
-         };
+         /**
+          * Multiply this point's x & y coordinates by point,
+          * yielding a new point.
+          * @param {Point} p the other point
+          * @return {Point} output point
+          */
+         multByPoint: function multByPoint(p) {
+           return this.clone()._multByPoint(p);
+         },
 
-         if (d.count) {
-           obj.count = d.count;
-         }
+         /**
+          * Divide this point's x & y coordinates by point,
+          * yielding a new point.
+          * @param {Point} p the other point
+          * @return {Point} output point
+          */
+         divByPoint: function divByPoint(p) {
+           return this.clone()._divByPoint(p);
+         },
 
-         return obj;
-       }
+         /**
+          * Multiply this point's x & y coordinates by a factor,
+          * yielding a new point.
+          * @param {Point} k factor
+          * @return {Point} output point
+          */
+         mult: function mult(k) {
+           return this.clone()._mult(k);
+         },
 
-       function roleKey(d) {
-         return {
-           value: d.role,
-           title: d.role
-         };
-       } // sort keys with ':' lower than keys without ':'
+         /**
+          * Divide this point's x & y coordinates by a factor,
+          * yielding a new point.
+          * @param {Point} k factor
+          * @return {Point} output point
+          */
+         div: function div(k) {
+           return this.clone()._div(k);
+         },
 
+         /**
+          * Rotate this point around the 0, 0 origin by an angle a,
+          * given in radians
+          * @param {Number} a angle to rotate around, in radians
+          * @return {Point} output point
+          */
+         rotate: function rotate(a) {
+           return this.clone()._rotate(a);
+         },
 
-       function sortKeys(a, b) {
-         return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
-       }
+         /**
+          * Rotate this point around p point by an angle a,
+          * given in radians
+          * @param {Number} a angle to rotate around, in radians
+          * @param {Point} p Point to rotate around
+          * @return {Point} output point
+          */
+         rotateAround: function rotateAround(a, p) {
+           return this.clone()._rotateAround(a, p);
+         },
 
-       var debouncedRequest$1 = debounce(request$1, 300, {
-         leading: false
-       });
+         /**
+          * Multiply this point by a 4x1 transformation matrix
+          * @param {Array<Number>} m transformation matrix
+          * @return {Point} output point
+          */
+         matMult: function matMult(m) {
+           return this.clone()._matMult(m);
+         },
 
-       function request$1(url, params, exactMatch, callback, loaded) {
-         if (_inflight$2[url]) return;
-         if (checkCache(url, params, exactMatch, callback)) return;
-         var controller = new AbortController();
-         _inflight$2[url] = controller;
-         d3_json(url, {
-           signal: controller.signal
-         }).then(function (result) {
-           delete _inflight$2[url];
-           if (loaded) loaded(null, result);
-         })["catch"](function (err) {
-           delete _inflight$2[url];
-           if (err.name === 'AbortError') return;
-           if (loaded) loaded(err.message);
-         });
-       }
+         /**
+          * Calculate this point but as a unit vector from 0, 0, meaning
+          * that the distance from the resulting point to the 0, 0
+          * coordinate will be equal to 1 and the angle from the resulting
+          * point to the 0, 0 coordinate will be the same as before.
+          * @return {Point} unit vector point
+          */
+         unit: function unit() {
+           return this.clone()._unit();
+         },
 
-       function checkCache(url, params, exactMatch, callback) {
-         var rp = params.rp || 25;
-         var testQuery = params.query || '';
-         var testUrl = url;
+         /**
+          * Compute a perpendicular point, where the new y coordinate
+          * is the old x coordinate and the new x coordinate is the old y
+          * coordinate multiplied by -1
+          * @return {Point} perpendicular point
+          */
+         perp: function perp() {
+           return this.clone()._perp();
+         },
 
-         do {
-           var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
+         /**
+          * Return a version of this point with the x & y coordinates
+          * rounded to integers.
+          * @return {Point} rounded point
+          */
+         round: function round() {
+           return this.clone()._round();
+         },
 
-           if (hit && (url === testUrl || hit.length < rp)) {
-             callback(null, hit);
-             return true;
-           } // don't try to shorten the query
+         /**
+          * Return the magitude of this point: this is the Euclidean
+          * distance from the 0, 0 coordinate to this point's x and y
+          * coordinates.
+          * @return {Number} magnitude
+          */
+         mag: function mag() {
+           return Math.sqrt(this.x * this.x + this.y * this.y);
+         },
 
+         /**
+          * Judge whether this point is equal to another point, returning
+          * true or false.
+          * @param {Point} other the other point
+          * @return {boolean} whether the points are equal
+          */
+         equals: function equals(other) {
+           return this.x === other.x && this.y === other.y;
+         },
 
-           if (exactMatch || !testQuery.length) return false; // do shorten the query to see if we already have a cached result
-           // that has returned fewer than max results (rp)
+         /**
+          * Calculate the distance from this point to another point
+          * @param {Point} p the other point
+          * @return {Number} distance
+          */
+         dist: function dist(p) {
+           return Math.sqrt(this.distSqr(p));
+         },
 
-           testQuery = testQuery.slice(0, -1);
-           testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
-         } while (testQuery.length >= 0);
+         /**
+          * Calculate the distance from this point to another point,
+          * without the square root step. Useful if you're comparing
+          * relative distances.
+          * @param {Point} p the other point
+          * @return {Number} distance
+          */
+         distSqr: function distSqr(p) {
+           var dx = p.x - this.x,
+               dy = p.y - this.y;
+           return dx * dx + dy * dy;
+         },
 
-         return false;
-       }
+         /**
+          * Get the angle from the 0, 0 coordinate to this point, in radians
+          * coordinates.
+          * @return {Number} angle
+          */
+         angle: function angle() {
+           return Math.atan2(this.y, this.x);
+         },
 
-       var serviceTaginfo = {
-         init: function init() {
-           _inflight$2 = {};
-           _taginfoCache = {};
-           _popularKeys = {
-             // manually exclude some keys – #5377, #7485
-             postal_code: true,
-             full_name: true,
-             loc_name: true,
-             reg_name: true,
-             short_name: true,
-             sorting_name: true,
-             artist_name: true,
-             nat_name: true,
-             long_name: true,
-             'bridge:name': true
-           }; // Fetch popular keys.  We'll exclude these from `values`
-           // lookups because they stress taginfo, and they aren't likely
-           // to yield meaningful autocomplete results.. see #3955
+         /**
+          * Get the angle from this point to another point, in radians
+          * @param {Point} b the other point
+          * @return {Number} angle
+          */
+         angleTo: function angleTo(b) {
+           return Math.atan2(this.y - b.y, this.x - b.x);
+         },
 
-           var params = {
-             rp: 100,
-             sortname: 'values_all',
-             sortorder: 'desc',
-             page: 1,
-             debounce: false,
-             lang: _mainLocalizer.languageCode()
-           };
-           this.keys(params, function (err, data) {
-             if (err) return;
-             data.forEach(function (d) {
-               if (d.value === 'opening_hours') return; // exception
+         /**
+          * Get the angle between this point and another point, in radians
+          * @param {Point} b the other point
+          * @return {Number} angle
+          */
+         angleWith: function angleWith(b) {
+           return this.angleWithSep(b.x, b.y);
+         },
 
-               _popularKeys[d.value] = true;
-             });
-           });
+         /*
+          * Find the angle of the two vectors, solving the formula for
+          * the cross product a x b = |a||b|sin(θ) for θ.
+          * @param {Number} x the x-coordinate
+          * @param {Number} y the y-coordinate
+          * @return {Number} the angle in radians
+          */
+         angleWithSep: function angleWithSep(x, y) {
+           return Math.atan2(this.x * y - this.y * x, this.x * x + this.y * y);
          },
-         reset: function reset() {
-           Object.values(_inflight$2).forEach(function (controller) {
-             controller.abort();
-           });
-           _inflight$2 = {};
+         _matMult: function _matMult(m) {
+           var x = m[0] * this.x + m[1] * this.y,
+               y = m[2] * this.x + m[3] * this.y;
+           this.x = x;
+           this.y = y;
+           return this;
          },
-         keys: function keys(params, callback) {
-           var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-           params = clean(setSort(params));
-           params = Object.assign({
-             rp: 10,
-             sortname: 'count_all',
-             sortorder: 'desc',
-             page: 1,
-             lang: _mainLocalizer.languageCode()
-           }, params);
-           var url = _apibase$1 + 'keys/all?' + utilQsString(params);
-           doRequest(url, params, false, callback, function (err, d) {
-             if (err) {
-               callback(err);
-             } else {
-               var f = filterKeys(params.filter);
-               var result = d.data.filter(f).sort(sortKeys).map(valKey);
-               _taginfoCache[url] = result;
-               callback(null, result);
-             }
-           });
+         _add: function _add(p) {
+           this.x += p.x;
+           this.y += p.y;
+           return this;
          },
-         multikeys: function multikeys(params, callback) {
-           var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-           params = clean(setSort(params));
-           params = Object.assign({
-             rp: 25,
-             sortname: 'count_all',
-             sortorder: 'desc',
-             page: 1,
-             lang: _mainLocalizer.languageCode()
-           }, params);
-           var prefix = params.query;
-           var url = _apibase$1 + 'keys/all?' + utilQsString(params);
-           doRequest(url, params, true, callback, function (err, d) {
-             if (err) {
-               callback(err);
-             } else {
-               var f = filterMultikeys(prefix);
-               var result = d.data.filter(f).map(valKey);
-               _taginfoCache[url] = result;
-               callback(null, result);
-             }
-           });
+         _sub: function _sub(p) {
+           this.x -= p.x;
+           this.y -= p.y;
+           return this;
          },
-         values: function values(params, callback) {
-           // Exclude popular keys from values lookups.. see #3955
-           var key = params.key;
-
-           if (key && _popularKeys[key]) {
-             callback(null, []);
-             return;
-           }
-
-           var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-           params = clean(setSort(setFilter(params)));
-           params = Object.assign({
-             rp: 25,
-             sortname: 'count_all',
-             sortorder: 'desc',
-             page: 1,
-             lang: _mainLocalizer.languageCode()
-           }, params);
-           var url = _apibase$1 + 'key/values?' + utilQsString(params);
-           doRequest(url, params, false, callback, function (err, d) {
-             if (err) {
-               callback(err);
-             } else {
-               // In most cases we prefer taginfo value results with lowercase letters.
-               // A few OSM keys expect values to contain uppercase values (see #3377).
-               // This is not an exhaustive list (e.g. `name` also has uppercase values)
-               // but these are the fields where taginfo value lookup is most useful.
-               var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery/;
-               var allowUpperCase = re.test(params.key);
-               var f = filterValues(allowUpperCase);
-               var result = d.data.filter(f).map(valKeyDescription);
-               _taginfoCache[url] = result;
-               callback(null, result);
-             }
-           });
+         _mult: function _mult(k) {
+           this.x *= k;
+           this.y *= k;
+           return this;
          },
-         roles: function roles(params, callback) {
-           var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-           var geometry = params.geometry;
-           params = clean(setSortMembers(params));
-           params = Object.assign({
-             rp: 25,
-             sortname: 'count_all_members',
-             sortorder: 'desc',
-             page: 1,
-             lang: _mainLocalizer.languageCode()
-           }, params);
-           var url = _apibase$1 + 'relation/roles?' + utilQsString(params);
-           doRequest(url, params, true, callback, function (err, d) {
-             if (err) {
-               callback(err);
-             } else {
-               var f = filterRoles(geometry);
-               var result = d.data.filter(f).map(roleKey);
-               _taginfoCache[url] = result;
-               callback(null, result);
-             }
-           });
+         _div: function _div(k) {
+           this.x /= k;
+           this.y /= k;
+           return this;
          },
-         docs: function docs(params, callback) {
-           var doRequest = params.debounce ? debouncedRequest$1 : request$1;
-           params = clean(setSort(params));
-           var path = 'key/wiki_pages?';
-
-           if (params.value) {
-             path = 'tag/wiki_pages?';
-           } else if (params.rtype) {
-             path = 'relation/wiki_pages?';
-           }
+         _multByPoint: function _multByPoint(p) {
+           this.x *= p.x;
+           this.y *= p.y;
+           return this;
+         },
+         _divByPoint: function _divByPoint(p) {
+           this.x /= p.x;
+           this.y /= p.y;
+           return this;
+         },
+         _unit: function _unit() {
+           this._div(this.mag());
 
-           var url = _apibase$1 + path + utilQsString(params);
-           doRequest(url, params, true, callback, function (err, d) {
-             if (err) {
-               callback(err);
-             } else {
-               _taginfoCache[url] = d.data;
-               callback(null, d.data);
-             }
-           });
+           return this;
          },
-         apibase: function apibase(_) {
-           if (!arguments.length) return _apibase$1;
-           _apibase$1 = _;
+         _perp: function _perp() {
+           var y = this.y;
+           this.y = this.x;
+           this.x = -y;
+           return this;
+         },
+         _rotate: function _rotate(angle) {
+           var cos = Math.cos(angle),
+               sin = Math.sin(angle),
+               x = cos * this.x - sin * this.y,
+               y = sin * this.x + cos * this.y;
+           this.x = x;
+           this.y = y;
+           return this;
+         },
+         _rotateAround: function _rotateAround(angle, p) {
+           var cos = Math.cos(angle),
+               sin = Math.sin(angle),
+               x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
+               y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
+           this.x = x;
+           this.y = y;
+           return this;
+         },
+         _round: function _round() {
+           this.x = Math.round(this.x);
+           this.y = Math.round(this.y);
            return this;
          }
        };
+       /**
+        * Construct a point from an array if necessary, otherwise if the input
+        * is already a Point, or an unknown type, return it unchanged
+        * @param {Array<Number>|Point|*} a any kind of input value
+        * @return {Point} constructed point, or passed-through value.
+        * @example
+        * // this
+        * var point = Point.convert([0, 1]);
+        * // is equivalent to
+        * var point = new Point(0, 1);
+        */
+
+       Point$1.convert = function (a) {
+         if (a instanceof Point$1) {
+           return a;
+         }
+
+         if (Array.isArray(a)) {
+           return new Point$1(a[0], a[1]);
+         }
+
+         return a;
+       };
+
+       var Point = pointGeometry;
+       var vectortilefeature = VectorTileFeature$1;
+
+       function VectorTileFeature$1(pbf, end, extent, keys, values) {
+         // Public
+         this.properties = {};
+         this.extent = extent;
+         this.type = 0; // Private
+
+         this._pbf = pbf;
+         this._geometry = -1;
+         this._keys = keys;
+         this._values = values;
+         pbf.readFields(readFeature, this, end);
+       }
+
+       function readFeature(tag, feature, pbf) {
+         if (tag == 1) feature.id = pbf.readVarint();else if (tag == 2) readTag(pbf, feature);else if (tag == 3) feature.type = pbf.readVarint();else if (tag == 4) feature._geometry = pbf.pos;
+       }
+
+       function readTag(pbf, feature) {
+         var end = pbf.readVarint() + pbf.pos;
+
+         while (pbf.pos < end) {
+           var key = feature._keys[pbf.readVarint()],
+               value = feature._values[pbf.readVarint()];
+
+           feature.properties[key] = value;
+         }
+       }
+
+       VectorTileFeature$1.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
+
+       VectorTileFeature$1.prototype.loadGeometry = function () {
+         var pbf = this._pbf;
+         pbf.pos = this._geometry;
+         var end = pbf.readVarint() + pbf.pos,
+             cmd = 1,
+             length = 0,
+             x = 0,
+             y = 0,
+             lines = [],
+             line;
 
-       var helpers$1 = createCommonjsModule(function (module, exports) {
+         while (pbf.pos < end) {
+           if (length <= 0) {
+             var cmdLen = pbf.readVarint();
+             cmd = cmdLen & 0x7;
+             length = cmdLen >> 3;
+           }
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         /**
-          * @module helpers
-          */
+           length--;
 
-         /**
-          * Earth Radius used with the Harvesine formula and approximates using a spherical (non-ellipsoid) Earth.
-          *
-          * @memberof helpers
-          * @type {number}
-          */
+           if (cmd === 1 || cmd === 2) {
+             x += pbf.readSVarint();
+             y += pbf.readSVarint();
 
-         exports.earthRadius = 6371008.8;
-         /**
-          * Unit of measurement factors using a spherical (non-ellipsoid) earth radius.
-          *
-          * @memberof helpers
-          * @type {Object}
-          */
+             if (cmd === 1) {
+               // moveTo
+               if (line) lines.push(line);
+               line = [];
+             }
 
-         exports.factors = {
-           centimeters: exports.earthRadius * 100,
-           centimetres: exports.earthRadius * 100,
-           degrees: exports.earthRadius / 111325,
-           feet: exports.earthRadius * 3.28084,
-           inches: exports.earthRadius * 39.370,
-           kilometers: exports.earthRadius / 1000,
-           kilometres: exports.earthRadius / 1000,
-           meters: exports.earthRadius,
-           metres: exports.earthRadius,
-           miles: exports.earthRadius / 1609.344,
-           millimeters: exports.earthRadius * 1000,
-           millimetres: exports.earthRadius * 1000,
-           nauticalmiles: exports.earthRadius / 1852,
-           radians: 1,
-           yards: exports.earthRadius / 1.0936
-         };
-         /**
-          * Units of measurement factors based on 1 meter.
-          *
-          * @memberof helpers
-          * @type {Object}
-          */
+             line.push(new Point(x, y));
+           } else if (cmd === 7) {
+             // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
+             if (line) {
+               line.push(line[0].clone()); // closePolygon
+             }
+           } else {
+             throw new Error('unknown command ' + cmd);
+           }
+         }
 
-         exports.unitsFactors = {
-           centimeters: 100,
-           centimetres: 100,
-           degrees: 1 / 111325,
-           feet: 3.28084,
-           inches: 39.370,
-           kilometers: 1 / 1000,
-           kilometres: 1 / 1000,
-           meters: 1,
-           metres: 1,
-           miles: 1 / 1609.344,
-           millimeters: 1000,
-           millimetres: 1000,
-           nauticalmiles: 1 / 1852,
-           radians: 1 / exports.earthRadius,
-           yards: 1 / 1.0936
-         };
-         /**
-          * Area of measurement factors based on 1 square meter.
-          *
-          * @memberof helpers
-          * @type {Object}
-          */
+         if (line) lines.push(line);
+         return lines;
+       };
 
-         exports.areaFactors = {
-           acres: 0.000247105,
-           centimeters: 10000,
-           centimetres: 10000,
-           feet: 10.763910417,
-           inches: 1550.003100006,
-           kilometers: 0.000001,
-           kilometres: 0.000001,
-           meters: 1,
-           metres: 1,
-           miles: 3.86e-7,
-           millimeters: 1000000,
-           millimetres: 1000000,
-           yards: 1.195990046
-         };
-         /**
-          * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
-          *
-          * @name feature
-          * @param {Geometry} geometry input geometry
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the Feature
-          * @returns {Feature} a GeoJSON Feature
-          * @example
-          * var geometry = {
-          *   "type": "Point",
-          *   "coordinates": [110, 50]
-          * };
-          *
-          * var feature = turf.feature(geometry);
-          *
-          * //=feature
-          */
+       VectorTileFeature$1.prototype.bbox = function () {
+         var pbf = this._pbf;
+         pbf.pos = this._geometry;
+         var end = pbf.readVarint() + pbf.pos,
+             cmd = 1,
+             length = 0,
+             x = 0,
+             y = 0,
+             x1 = Infinity,
+             x2 = -Infinity,
+             y1 = Infinity,
+             y2 = -Infinity;
 
-         function feature(geom, properties, options) {
-           if (options === void 0) {
-             options = {};
+         while (pbf.pos < end) {
+           if (length <= 0) {
+             var cmdLen = pbf.readVarint();
+             cmd = cmdLen & 0x7;
+             length = cmdLen >> 3;
            }
 
-           var feat = {
-             type: "Feature"
-           };
+           length--;
 
-           if (options.id === 0 || options.id) {
-             feat.id = options.id;
+           if (cmd === 1 || cmd === 2) {
+             x += pbf.readSVarint();
+             y += pbf.readSVarint();
+             if (x < x1) x1 = x;
+             if (x > x2) x2 = x;
+             if (y < y1) y1 = y;
+             if (y > y2) y2 = y;
+           } else if (cmd !== 7) {
+             throw new Error('unknown command ' + cmd);
            }
+         }
 
-           if (options.bbox) {
-             feat.bbox = options.bbox;
-           }
+         return [x1, y1, x2, y2];
+       };
 
-           feat.properties = properties || {};
-           feat.geometry = geom;
-           return feat;
-         }
+       VectorTileFeature$1.prototype.toGeoJSON = function (x, y, z) {
+         var size = this.extent * Math.pow(2, z),
+             x0 = this.extent * x,
+             y0 = this.extent * y,
+             coords = this.loadGeometry(),
+             type = VectorTileFeature$1.types[this.type],
+             i,
+             j;
 
-         exports.feature = feature;
-         /**
-          * Creates a GeoJSON {@link Geometry} from a Geometry string type & coordinates.
-          * For GeometryCollection type use `helpers.geometryCollection`
-          *
-          * @name geometry
-          * @param {string} type Geometry Type
-          * @param {Array<any>} coordinates Coordinates
-          * @param {Object} [options={}] Optional Parameters
-          * @returns {Geometry} a GeoJSON Geometry
-          * @example
-          * var type = "Point";
-          * var coordinates = [110, 50];
-          * var geometry = turf.geometry(type, coordinates);
-          * // => geometry
-          */
+         function project(line) {
+           for (var j = 0; j < line.length; j++) {
+             var p = line[j],
+                 y2 = 180 - (p.y + y0) * 360 / size;
+             line[j] = [(p.x + x0) * 360 / size - 180, 360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90];
+           }
+         }
 
-         function geometry(type, coordinates, options) {
+         switch (this.type) {
+           case 1:
+             var points = [];
 
-           switch (type) {
-             case "Point":
-               return point(coordinates).geometry;
+             for (i = 0; i < coords.length; i++) {
+               points[i] = coords[i][0];
+             }
 
-             case "LineString":
-               return lineString(coordinates).geometry;
+             coords = points;
+             project(coords);
+             break;
 
-             case "Polygon":
-               return polygon(coordinates).geometry;
+           case 2:
+             for (i = 0; i < coords.length; i++) {
+               project(coords[i]);
+             }
 
-             case "MultiPoint":
-               return multiPoint(coordinates).geometry;
+             break;
 
-             case "MultiLineString":
-               return multiLineString(coordinates).geometry;
+           case 3:
+             coords = classifyRings(coords);
 
-             case "MultiPolygon":
-               return multiPolygon(coordinates).geometry;
+             for (i = 0; i < coords.length; i++) {
+               for (j = 0; j < coords[i].length; j++) {
+                 project(coords[i][j]);
+               }
+             }
 
-             default:
-               throw new Error(type + " is invalid");
-           }
+             break;
          }
 
-         exports.geometry = geometry;
-         /**
-          * Creates a {@link Point} {@link Feature} from a Position.
-          *
-          * @name point
-          * @param {Array<number>} coordinates longitude, latitude position (each in decimal degrees)
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the Feature
-          * @returns {Feature<Point>} a Point feature
-          * @example
-          * var point = turf.point([-75.343, 39.984]);
-          *
-          * //=point
-          */
+         if (coords.length === 1) {
+           coords = coords[0];
+         } else {
+           type = 'Multi' + type;
+         }
 
-         function point(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+         var result = {
+           type: "Feature",
+           geometry: {
+             type: type,
+             coordinates: coords
+           },
+           properties: this.properties
+         };
 
-           var geom = {
-             type: "Point",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
+         if ('id' in this) {
+           result.id = this.id;
          }
 
-         exports.point = point;
-         /**
-          * Creates a {@link Point} {@link FeatureCollection} from an Array of Point coordinates.
-          *
-          * @name points
-          * @param {Array<Array<number>>} coordinates an array of Points
-          * @param {Object} [properties={}] Translate these properties to each Feature
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-          * associated with the FeatureCollection
-          * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-          * @returns {FeatureCollection<Point>} Point Feature
-          * @example
-          * var points = turf.points([
-          *   [-75, 39],
-          *   [-80, 45],
-          *   [-78, 50]
-          * ]);
-          *
-          * //=points
-          */
+         return result;
+       }; // classifies an array of rings into polygons with outer rings and holes
 
-         function points(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
+
+       function classifyRings(rings) {
+         var len = rings.length;
+         if (len <= 1) return [rings];
+         var polygons = [],
+             polygon,
+             ccw;
+
+         for (var i = 0; i < len; i++) {
+           var area = signedArea(rings[i]);
+           if (area === 0) continue;
+           if (ccw === undefined) ccw = area < 0;
+
+           if (ccw === area < 0) {
+             if (polygon) polygons.push(polygon);
+             polygon = [rings[i]];
+           } else {
+             polygon.push(rings[i]);
            }
+         }
+
+         if (polygon) polygons.push(polygon);
+         return polygons;
+       }
+
+       function signedArea(ring) {
+         var sum = 0;
 
-           return featureCollection(coordinates.map(function (coords) {
-             return point(coords, properties);
-           }), options);
+         for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
+           p1 = ring[i];
+           p2 = ring[j];
+           sum += (p2.x - p1.x) * (p1.y + p2.y);
          }
 
-         exports.points = points;
-         /**
-          * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
-          *
-          * @name polygon
-          * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the Feature
-          * @returns {Feature<Polygon>} Polygon Feature
-          * @example
-          * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
-          *
-          * //=polygon
-          */
+         return sum;
+       }
 
-         function polygon(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+       var VectorTileFeature = vectortilefeature;
+       var vectortilelayer = VectorTileLayer$1;
 
-           for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
-             var ring = coordinates_1[_i];
+       function VectorTileLayer$1(pbf, end) {
+         // Public
+         this.version = 1;
+         this.name = null;
+         this.extent = 4096;
+         this.length = 0; // Private
 
-             if (ring.length < 4) {
-               throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
-             }
+         this._pbf = pbf;
+         this._keys = [];
+         this._values = [];
+         this._features = [];
+         pbf.readFields(readLayer, this, end);
+         this.length = this._features.length;
+       }
 
-             for (var j = 0; j < ring[ring.length - 1].length; j++) {
-               // Check if first point of Polygon contains two numbers
-               if (ring[ring.length - 1][j] !== ring[0][j]) {
-                 throw new Error("First and last Position are not equivalent.");
-               }
-             }
-           }
+       function readLayer(tag, layer, pbf) {
+         if (tag === 15) layer.version = pbf.readVarint();else if (tag === 1) layer.name = pbf.readString();else if (tag === 5) layer.extent = pbf.readVarint();else if (tag === 2) layer._features.push(pbf.pos);else if (tag === 3) layer._keys.push(pbf.readString());else if (tag === 4) layer._values.push(readValueMessage(pbf));
+       }
 
-           var geom = {
-             type: "Polygon",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
+       function readValueMessage(pbf) {
+         var value = null,
+             end = pbf.readVarint() + pbf.pos;
+
+         while (pbf.pos < end) {
+           var tag = pbf.readVarint() >> 3;
+           value = tag === 1 ? pbf.readString() : tag === 2 ? pbf.readFloat() : tag === 3 ? pbf.readDouble() : tag === 4 ? pbf.readVarint64() : tag === 5 ? pbf.readVarint() : tag === 6 ? pbf.readSVarint() : tag === 7 ? pbf.readBoolean() : null;
          }
 
-         exports.polygon = polygon;
-         /**
-          * Creates a {@link Polygon} {@link FeatureCollection} from an Array of Polygon coordinates.
-          *
-          * @name polygons
-          * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygon coordinates
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-          * @returns {FeatureCollection<Polygon>} Polygon FeatureCollection
-          * @example
-          * var polygons = turf.polygons([
-          *   [[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]],
-          *   [[[-15, 42], [-14, 46], [-12, 41], [-17, 44], [-15, 42]]],
-          * ]);
-          *
-          * //=polygons
-          */
+         return value;
+       } // return feature `i` from this layer as a `VectorTileFeature`
 
-         function polygons(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
 
-           return featureCollection(coordinates.map(function (coords) {
-             return polygon(coords, properties);
-           }), options);
-         }
+       VectorTileLayer$1.prototype.feature = function (i) {
+         if (i < 0 || i >= this._features.length) throw new Error('feature index out of bounds');
+         this._pbf.pos = this._features[i];
 
-         exports.polygons = polygons;
-         /**
-          * Creates a {@link LineString} {@link Feature} from an Array of Positions.
-          *
-          * @name lineString
-          * @param {Array<Array<number>>} coordinates an array of Positions
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the Feature
-          * @returns {Feature<LineString>} LineString Feature
-          * @example
-          * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
-          * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
-          *
-          * //=linestring1
-          * //=linestring2
-          */
+         var end = this._pbf.readVarint() + this._pbf.pos;
 
-         function lineString(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+         return new VectorTileFeature(this._pbf, end, this.extent, this._keys, this._values);
+       };
 
-           if (coordinates.length < 2) {
-             throw new Error("coordinates must be an array of two or more positions");
-           }
+       var VectorTileLayer = vectortilelayer;
+       var vectortile = VectorTile$1;
 
-           var geom = {
-             type: "LineString",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
+       function VectorTile$1(pbf, end) {
+         this.layers = pbf.readFields(readTile, {}, end);
+       }
+
+       function readTile(tag, layers, pbf) {
+         if (tag === 3) {
+           var layer = new VectorTileLayer(pbf, pbf.readVarint() + pbf.pos);
+           if (layer.length) layers[layer.name] = layer;
          }
+       }
 
-         exports.lineString = lineString;
-         /**
-          * Creates a {@link LineString} {@link FeatureCollection} from an Array of LineString coordinates.
-          *
-          * @name lineStrings
-          * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north]
-          * associated with the FeatureCollection
-          * @param {string|number} [options.id] Identifier associated with the FeatureCollection
-          * @returns {FeatureCollection<LineString>} LineString FeatureCollection
-          * @example
-          * var linestrings = turf.lineStrings([
-          *   [[-24, 63], [-23, 60], [-25, 65], [-20, 69]],
-          *   [[-14, 43], [-13, 40], [-15, 45], [-10, 49]]
-          * ]);
-          *
-          * //=linestrings
-          */
+       var VectorTile = vectorTile.VectorTile = vectortile;
+       vectorTile.VectorTileFeature = vectortilefeature;
+       vectorTile.VectorTileLayer = vectortilelayer;
 
-         function lineStrings(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+       var accessToken = 'MLY|4100327730013843|5bb78b81720791946a9a7b956c57b7cf';
+       var apiUrl = 'https://graph.mapillary.com/';
+       var baseTileUrl = 'https://tiles.mapillary.com/maps/vtp';
+       var mapFeatureTileUrl = "".concat(baseTileUrl, "/mly_map_feature_point/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+       var tileUrl = "".concat(baseTileUrl, "/mly1_public/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+       var trafficSignTileUrl = "".concat(baseTileUrl, "/mly_map_feature_traffic_sign/2/{z}/{x}/{y}?access_token=").concat(accessToken);
+       var viewercss = 'mapillary-js/mapillary.css';
+       var viewerjs = 'mapillary-js/mapillary.js';
+       var minZoom$1 = 14;
+       var dispatch$4 = dispatch$8('change', 'loadedImages', 'loadedSigns', 'loadedMapFeatures', 'bearingChanged', 'imageChanged');
 
-           return featureCollection(coordinates.map(function (coords) {
-             return lineString(coords, properties);
-           }), options);
-         }
+       var _loadViewerPromise$2;
 
-         exports.lineStrings = lineStrings;
-         /**
-          * Takes one or more {@link Feature|Features} and creates a {@link FeatureCollection}.
-          *
-          * @name featureCollection
-          * @param {Feature[]} features input features
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the Feature
-          * @returns {FeatureCollection} FeatureCollection of Features
-          * @example
-          * var locationA = turf.point([-75.343, 39.984], {name: 'Location A'});
-          * var locationB = turf.point([-75.833, 39.284], {name: 'Location B'});
-          * var locationC = turf.point([-75.534, 39.123], {name: 'Location C'});
-          *
-          * var collection = turf.featureCollection([
-          *   locationA,
-          *   locationB,
-          *   locationC
-          * ]);
-          *
-          * //=collection
-          */
+       var _mlyActiveImage;
 
-         function featureCollection(features, options) {
-           if (options === void 0) {
-             options = {};
-           }
+       var _mlyCache;
 
-           var fc = {
-             type: "FeatureCollection"
-           };
+       var _mlyFallback = false;
 
-           if (options.id) {
-             fc.id = options.id;
-           }
+       var _mlyHighlightedDetection;
 
-           if (options.bbox) {
-             fc.bbox = options.bbox;
-           }
+       var _mlyShowFeatureDetections = false;
+       var _mlyShowSignDetections = false;
 
-           fc.features = features;
-           return fc;
-         }
+       var _mlyViewer;
 
-         exports.featureCollection = featureCollection;
-         /**
-          * Creates a {@link Feature<MultiLineString>} based on a
-          * coordinate array. Properties can be added optionally.
-          *
-          * @name multiLineString
-          * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the Feature
-          * @returns {Feature<MultiLineString>} a MultiLineString feature
-          * @throws {Error} if no coordinates are passed
-          * @example
-          * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
-          *
-          * //=multiLine
-          */
+       var _mlyViewerFilter = ['all']; // Load all data for the specified type from Mapillary vector tiles
+
+       function loadTiles$2(which, url, maxZoom, projection) {
+         var tiler = utilTiler().zoomExtent([minZoom$1, maxZoom]).skipNullIsland(true);
+         var tiles = tiler.getTiles(projection);
+         tiles.forEach(function (tile) {
+           loadTile$1(which, url, tile);
+         });
+       } // Load all data for the specified type from one vector tile
 
-         function multiLineString(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
+
+       function loadTile$1(which, url, tile) {
+         var cache = _mlyCache.requests;
+         var tileId = "".concat(tile.id, "-").concat(which);
+         if (cache.loaded[tileId] || cache.inflight[tileId]) return;
+         var controller = new AbortController();
+         cache.inflight[tileId] = controller;
+         var requestUrl = url.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]).replace('{z}', tile.xyz[2]);
+         fetch(requestUrl, {
+           signal: controller.signal
+         }).then(function (response) {
+           if (!response.ok) {
+             throw new Error(response.status + ' ' + response.statusText);
            }
 
-           var geom = {
-             type: "MultiLineString",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
-         }
+           cache.loaded[tileId] = true;
+           delete cache.inflight[tileId];
+           return response.arrayBuffer();
+         }).then(function (data) {
+           if (!data) {
+             throw new Error('No Data');
+           }
 
-         exports.multiLineString = multiLineString;
-         /**
-          * Creates a {@link Feature<MultiPoint>} based on a
-          * coordinate array. Properties can be added optionally.
-          *
-          * @name multiPoint
-          * @param {Array<Array<number>>} coordinates an array of Positions
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the Feature
-          * @returns {Feature<MultiPoint>} a MultiPoint feature
-          * @throws {Error} if no coordinates are passed
-          * @example
-          * var multiPt = turf.multiPoint([[0,0],[10,10]]);
-          *
-          * //=multiPt
-          */
+           loadTileDataToCache(data, tile, which);
 
-         function multiPoint(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
+           if (which === 'images') {
+             dispatch$4.call('loadedImages');
+           } else if (which === 'signs') {
+             dispatch$4.call('loadedSigns');
+           } else if (which === 'points') {
+             dispatch$4.call('loadedMapFeatures');
            }
+         })["catch"](function () {
+           cache.loaded[tileId] = true;
+           delete cache.inflight[tileId];
+         });
+       } // Load the data from the vector tile into cache
 
-           var geom = {
-             type: "MultiPoint",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
-         }
 
-         exports.multiPoint = multiPoint;
-         /**
-          * Creates a {@link Feature<MultiPolygon>} based on a
-          * coordinate array. Properties can be added optionally.
-          *
-          * @name multiPolygon
-          * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the Feature
-          * @returns {Feature<MultiPolygon>} a multipolygon feature
-          * @throws {Error} if no coordinates are passed
-          * @example
-          * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
-          *
-          * //=multiPoly
-          *
-          */
+       function loadTileDataToCache(data, tile, which) {
+         var vectorTile = new VectorTile(new pbf(data));
+         var features, cache, layer, i, feature, loc, d;
 
-         function multiPolygon(coordinates, properties, options) {
-           if (options === void 0) {
-             options = {};
+         if (vectorTile.layers.hasOwnProperty('image')) {
+           features = [];
+           cache = _mlyCache.images;
+           layer = vectorTile.layers.image;
+
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+             loc = feature.geometry.coordinates;
+             d = {
+               loc: loc,
+               captured_at: feature.properties.captured_at,
+               ca: feature.properties.compass_angle,
+               id: feature.properties.id,
+               is_pano: feature.properties.is_pano,
+               sequence_id: feature.properties.sequence_id
+             };
+             cache.forImageId[d.id] = d;
+             features.push({
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             });
            }
 
-           var geom = {
-             type: "MultiPolygon",
-             coordinates: coordinates
-           };
-           return feature(geom, properties, options);
+           if (cache.rtree) {
+             cache.rtree.load(features);
+           }
          }
 
-         exports.multiPolygon = multiPolygon;
-         /**
-          * Creates a {@link Feature<GeometryCollection>} based on a
-          * coordinate array. Properties can be added optionally.
-          *
-          * @name geometryCollection
-          * @param {Array<Geometry>} geometries an array of GeoJSON Geometries
-          * @param {Object} [properties={}] an Object of key-value pairs to add as properties
-          * @param {Object} [options={}] Optional Parameters
-          * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
-          * @param {string|number} [options.id] Identifier associated with the Feature
-          * @returns {Feature<GeometryCollection>} a GeoJSON GeometryCollection Feature
-          * @example
-          * var pt = turf.geometry("Point", [100, 0]);
-          * var line = turf.geometry("LineString", [[101, 0], [102, 1]]);
-          * var collection = turf.geometryCollection([pt, line]);
-          *
-          * // => collection
-          */
+         if (vectorTile.layers.hasOwnProperty('sequence')) {
+           features = [];
+           cache = _mlyCache.sequences;
+           layer = vectorTile.layers.sequence;
 
-         function geometryCollection(geometries, properties, options) {
-           if (options === void 0) {
-             options = {};
-           }
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
 
-           var geom = {
-             type: "GeometryCollection",
-             geometries: geometries
-           };
-           return feature(geom, properties, options);
+             if (cache.lineString[feature.properties.id]) {
+               cache.lineString[feature.properties.id].push(feature);
+             } else {
+               cache.lineString[feature.properties.id] = [feature];
+             }
+           }
          }
 
-         exports.geometryCollection = geometryCollection;
-         /**
-          * Round number to precision
-          *
-          * @param {number} num Number
-          * @param {number} [precision=0] Precision
-          * @returns {number} rounded number
-          * @example
-          * turf.round(120.4321)
-          * //=120
-          *
-          * turf.round(120.4321, 2)
-          * //=120.43
-          */
+         if (vectorTile.layers.hasOwnProperty('point')) {
+           features = [];
+           cache = _mlyCache[which];
+           layer = vectorTile.layers.point;
 
-         function round(num, precision) {
-           if (precision === void 0) {
-             precision = 0;
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+             loc = feature.geometry.coordinates;
+             d = {
+               loc: loc,
+               id: feature.properties.id,
+               first_seen_at: feature.properties.first_seen_at,
+               last_seen_at: feature.properties.last_seen_at,
+               value: feature.properties.value
+             };
+             features.push({
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             });
            }
 
-           if (precision && !(precision >= 0)) {
-             throw new Error("precision must be a positive number");
+           if (cache.rtree) {
+             cache.rtree.load(features);
            }
-
-           var multiplier = Math.pow(10, precision || 0);
-           return Math.round(num * multiplier) / multiplier;
          }
 
-         exports.round = round;
-         /**
-          * Convert a distance measurement (assuming a spherical Earth) from radians to a more friendly unit.
-          * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-          *
-          * @name radiansToLength
-          * @param {number} radians in radians across the sphere
-          * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-          * meters, kilometres, kilometers.
-          * @returns {number} distance
-          */
+         if (vectorTile.layers.hasOwnProperty('traffic_sign')) {
+           features = [];
+           cache = _mlyCache[which];
+           layer = vectorTile.layers.traffic_sign;
 
-         function radiansToLength(radians, units) {
-           if (units === void 0) {
-             units = "kilometers";
+           for (i = 0; i < layer.length; i++) {
+             feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+             loc = feature.geometry.coordinates;
+             d = {
+               loc: loc,
+               id: feature.properties.id,
+               first_seen_at: feature.properties.first_seen_at,
+               last_seen_at: feature.properties.last_seen_at,
+               value: feature.properties.value
+             };
+             features.push({
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             });
            }
 
-           var factor = exports.factors[units];
-
-           if (!factor) {
-             throw new Error(units + " units is invalid");
+           if (cache.rtree) {
+             cache.rtree.load(features);
            }
-
-           return radians * factor;
          }
+       } // Get data from the API
 
-         exports.radiansToLength = radiansToLength;
-         /**
-          * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into radians
-          * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-          *
-          * @name lengthToRadians
-          * @param {number} distance in real units
-          * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-          * meters, kilometres, kilometers.
-          * @returns {number} radians
-          */
 
-         function lengthToRadians(distance, units) {
-           if (units === void 0) {
-             units = "kilometers";
+       function loadData(url) {
+         return fetch(url).then(function (response) {
+           if (!response.ok) {
+             throw new Error(response.status + ' ' + response.statusText);
            }
 
-           var factor = exports.factors[units];
-
-           if (!factor) {
-             throw new Error(units + " units is invalid");
+           return response.json();
+         }).then(function (result) {
+           if (!result) {
+             return [];
            }
 
-           return distance / factor;
-         }
+           return result.data || [];
+         });
+       } // Partition viewport into higher zoom tiles
 
-         exports.lengthToRadians = lengthToRadians;
-         /**
-          * Convert a distance measurement (assuming a spherical Earth) from a real-world unit into degrees
-          * Valid units: miles, nauticalmiles, inches, yards, meters, metres, centimeters, kilometres, feet
-          *
-          * @name lengthToDegrees
-          * @param {number} distance in real units
-          * @param {string} [units="kilometers"] can be degrees, radians, miles, or kilometers inches, yards, metres,
-          * meters, kilometres, kilometers.
-          * @returns {number} degrees
-          */
 
-         function lengthToDegrees(distance, units) {
-           return radiansToDegrees(lengthToRadians(distance, units));
-         }
+       function partitionViewport$2(projection) {
+         var z = geoScaleToZoom(projection.scale());
+         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
+
+         var tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // Return no more than `limit` results per partition.
 
-         exports.lengthToDegrees = lengthToDegrees;
-         /**
-          * Converts any bearing angle from the north line direction (positive clockwise)
-          * and returns an angle between 0-360 degrees (positive clockwise), 0 being the north line
-          *
-          * @name bearingToAzimuth
-          * @param {number} bearing angle, between -180 and +180 degrees
-          * @returns {number} angle between 0 and 360 degrees
-          */
 
-         function bearingToAzimuth(bearing) {
-           var angle = bearing % 360;
+       function searchLimited$2(limit, projection, rtree) {
+         limit = limit || 5;
+         return partitionViewport$2(projection).reduce(function (result, extent) {
+           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+             return d.data;
+           });
+           return found.length ? result.concat(found) : result;
+         }, []);
+       }
 
-           if (angle < 0) {
-             angle += 360;
+       var serviceMapillary = {
+         // Initialize Mapillary
+         init: function init() {
+           if (!_mlyCache) {
+             this.reset();
            }
 
-           return angle;
-         }
+           this.event = utilRebind(this, dispatch$4, 'on');
+         },
+         // Reset cache and state
+         reset: function reset() {
+           if (_mlyCache) {
+             Object.values(_mlyCache.requests.inflight).forEach(function (request) {
+               request.abort();
+             });
+           }
 
-         exports.bearingToAzimuth = bearingToAzimuth;
-         /**
-          * Converts an angle in radians to degrees
-          *
-          * @name radiansToDegrees
-          * @param {number} radians angle in radians
-          * @returns {number} degrees between 0 and 360 degrees
-          */
+           _mlyCache = {
+             images: {
+               rtree: new RBush(),
+               forImageId: {}
+             },
+             image_detections: {
+               forImageId: {}
+             },
+             signs: {
+               rtree: new RBush()
+             },
+             points: {
+               rtree: new RBush()
+             },
+             sequences: {
+               rtree: new RBush(),
+               lineString: {}
+             },
+             requests: {
+               loaded: {},
+               inflight: {}
+             }
+           };
+           _mlyActiveImage = null;
+         },
+         // Get visible images
+         images: function images(projection) {
+           var limit = 5;
+           return searchLimited$2(limit, projection, _mlyCache.images.rtree);
+         },
+         // Get visible traffic signs
+         signs: function signs(projection) {
+           var limit = 5;
+           return searchLimited$2(limit, projection, _mlyCache.signs.rtree);
+         },
+         // Get visible map (point) features
+         mapFeatures: function mapFeatures(projection) {
+           var limit = 5;
+           return searchLimited$2(limit, projection, _mlyCache.points.rtree);
+         },
+         // Get cached image by id
+         cachedImage: function cachedImage(imageId) {
+           return _mlyCache.images.forImageId[imageId];
+         },
+         // Get visible sequences
+         sequences: function sequences(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           var sequenceIds = {};
+           var lineStrings = [];
 
-         function radiansToDegrees(radians) {
-           var degrees = radians % (2 * Math.PI);
-           return degrees * 180 / Math.PI;
-         }
+           _mlyCache.images.rtree.search(bbox).forEach(function (d) {
+             if (d.data.sequence_id) {
+               sequenceIds[d.data.sequence_id] = true;
+             }
+           });
 
-         exports.radiansToDegrees = radiansToDegrees;
-         /**
-          * Converts an angle in degrees to radians
-          *
-          * @name degreesToRadians
-          * @param {number} degrees angle between 0 and 360 degrees
-          * @returns {number} angle in radians
-          */
+           Object.keys(sequenceIds).forEach(function (sequenceId) {
+             if (_mlyCache.sequences.lineString[sequenceId]) {
+               lineStrings = lineStrings.concat(_mlyCache.sequences.lineString[sequenceId]);
+             }
+           });
+           return lineStrings;
+         },
+         // Load images in the visible area
+         loadImages: function loadImages(projection) {
+           loadTiles$2('images', tileUrl, 14, projection);
+         },
+         // Load traffic signs in the visible area
+         loadSigns: function loadSigns(projection) {
+           loadTiles$2('signs', trafficSignTileUrl, 14, projection);
+         },
+         // Load map (point) features in the visible area
+         loadMapFeatures: function loadMapFeatures(projection) {
+           loadTiles$2('points', mapFeatureTileUrl, 14, projection);
+         },
+         // Return a promise that resolves when the image viewer (Mapillary JS) library has finished loading
+         ensureViewerLoaded: function ensureViewerLoaded(context) {
+           if (_loadViewerPromise$2) return _loadViewerPromise$2; // add mly-wrapper
 
-         function degreesToRadians(degrees) {
-           var radians = degrees % 360;
-           return radians * Math.PI / 180;
-         }
+           var wrap = context.container().select('.photoviewer').selectAll('.mly-wrapper').data([0]);
+           wrap.enter().append('div').attr('id', 'ideditor-mly').attr('class', 'photo-wrapper mly-wrapper').classed('hide', true);
+           var that = this;
+           _loadViewerPromise$2 = new Promise(function (resolve, reject) {
+             var loadedCount = 0;
 
-         exports.degreesToRadians = degreesToRadians;
-         /**
-          * Converts a length to the requested unit.
-          * Valid units: miles, nauticalmiles, inches, yards, meters, metres, kilometers, centimeters, feet
-          *
-          * @param {number} length to be converted
-          * @param {Units} [originalUnit="kilometers"] of the length
-          * @param {Units} [finalUnit="kilometers"] returned unit
-          * @returns {number} the converted length
-          */
+             function loaded() {
+               loadedCount += 1; // wait until both files are loaded
+
+               if (loadedCount === 2) resolve();
+             }
+
+             var head = select('head'); // load mapillary-viewercss
+
+             head.selectAll('#ideditor-mapillary-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-mapillary-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(viewercss)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+               reject();
+             }); // load mapillary-viewerjs
 
-         function convertLength(length, originalUnit, finalUnit) {
-           if (originalUnit === void 0) {
-             originalUnit = "kilometers";
+             head.selectAll('#ideditor-mapillary-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-mapillary-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(viewerjs)).on('load.serviceMapillary', loaded).on('error.serviceMapillary', function () {
+               reject();
+             });
+           })["catch"](function () {
+             _loadViewerPromise$2 = null;
+           }).then(function () {
+             that.initViewer(context);
+           });
+           return _loadViewerPromise$2;
+         },
+         // Load traffic sign image sprites
+         loadSignResources: function loadSignResources(context) {
+           context.ui().svgDefs.addSprites(['mapillary-sprite'], false
+           /* don't override colors */
+           );
+           return this;
+         },
+         // Load map (point) feature image sprites
+         loadObjectResources: function loadObjectResources(context) {
+           context.ui().svgDefs.addSprites(['mapillary-object-sprite'], false
+           /* don't override colors */
+           );
+           return this;
+         },
+         // Remove previous detections in image viewer
+         resetTags: function resetTags() {
+           if (_mlyViewer && !_mlyFallback) {
+             _mlyViewer.getComponent('tag').removeAll();
            }
+         },
+         // Show map feature detections in image viewer
+         showFeatureDetections: function showFeatureDetections(value) {
+           _mlyShowFeatureDetections = value;
 
-           if (finalUnit === void 0) {
-             finalUnit = "kilometers";
+           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+             this.resetTags();
            }
+         },
+         // Show traffic sign detections in image viewer
+         showSignDetections: function showSignDetections(value) {
+           _mlyShowSignDetections = value;
 
-           if (!(length >= 0)) {
-             throw new Error("length must be a positive number");
+           if (!_mlyShowFeatureDetections && !_mlyShowSignDetections) {
+             this.resetTags();
            }
+         },
+         // Apply filter to image viewer
+         filterViewer: function filterViewer(context) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var filter = ['all'];
+           if (!showsPano) filter.push(['!=', 'cameraType', 'spherical']);
+           if (!showsFlat && showsPano) filter.push(['==', 'pano', true]);
 
-           return radiansToLength(lengthToRadians(length, originalUnit), finalUnit);
-         }
-
-         exports.convertLength = convertLength;
-         /**
-          * Converts a area to the requested unit.
-          * Valid units: kilometers, kilometres, meters, metres, centimetres, millimeters, acres, miles, yards, feet, inches
-          * @param {number} area to be converted
-          * @param {Units} [originalUnit="meters"] of the distance
-          * @param {Units} [finalUnit="kilometers"] returned unit
-          * @returns {number} the converted distance
-          */
-
-         function convertArea(area, originalUnit, finalUnit) {
-           if (originalUnit === void 0) {
-             originalUnit = "meters";
+           if (fromDate) {
+             filter.push(['>=', 'capturedAt', new Date(fromDate).getTime()]);
            }
 
-           if (finalUnit === void 0) {
-             finalUnit = "kilometers";
+           if (toDate) {
+             filter.push(['>=', 'capturedAt', new Date(toDate).getTime()]);
            }
 
-           if (!(area >= 0)) {
-             throw new Error("area must be a positive number");
+           if (_mlyViewer) {
+             _mlyViewer.setFilter(filter);
            }
 
-           var startFactor = exports.areaFactors[originalUnit];
-
-           if (!startFactor) {
-             throw new Error("invalid original units");
-           }
+           _mlyViewerFilter = filter;
+           return filter;
+         },
+         // Make the image viewer visible
+         showViewer: function showViewer(context) {
+           var wrap = context.container().select('.photoviewer').classed('hide', false);
+           var isHidden = wrap.selectAll('.photo-wrapper.mly-wrapper.hide').size();
 
-           var finalFactor = exports.areaFactors[finalUnit];
+           if (isHidden && _mlyViewer) {
+             wrap.selectAll('.photo-wrapper:not(.mly-wrapper)').classed('hide', true);
+             wrap.selectAll('.photo-wrapper.mly-wrapper').classed('hide', false);
 
-           if (!finalFactor) {
-             throw new Error("invalid final units");
+             _mlyViewer.resize();
            }
 
-           return area / startFactor * finalFactor;
-         }
-
-         exports.convertArea = convertArea;
-         /**
-          * isNumber
-          *
-          * @param {*} num Number to validate
-          * @returns {boolean} true/false
-          * @example
-          * turf.isNumber(123)
-          * //=true
-          * turf.isNumber('foo')
-          * //=false
-          */
-
-         function isNumber(num) {
-           return !isNaN(num) && num !== null && !Array.isArray(num) && !/^\s*$/.test(num);
-         }
-
-         exports.isNumber = isNumber;
-         /**
-          * isObject
-          *
-          * @param {*} input variable to validate
-          * @returns {boolean} true/false
-          * @example
-          * turf.isObject({elevation: 10})
-          * //=true
-          * turf.isObject('foo')
-          * //=false
-          */
-
-         function isObject(input) {
-           return !!input && input.constructor === Object;
-         }
-
-         exports.isObject = isObject;
-         /**
-          * Validate BBox
-          *
-          * @private
-          * @param {Array<number>} bbox BBox to validate
-          * @returns {void}
-          * @throws Error if BBox is not valid
-          * @example
-          * validateBBox([-180, -40, 110, 50])
-          * //=OK
-          * validateBBox([-180, -40])
-          * //=Error
-          * validateBBox('Foo')
-          * //=Error
-          * validateBBox(5)
-          * //=Error
-          * validateBBox(null)
-          * //=Error
-          * validateBBox(undefined)
-          * //=Error
-          */
-
-         function validateBBox(bbox) {
-           if (!bbox) {
-             throw new Error("bbox is required");
-           }
+           return this;
+         },
+         // Hide the image viewer and resets map markers
+         hideViewer: function hideViewer(context) {
+           _mlyActiveImage = null;
 
-           if (!Array.isArray(bbox)) {
-             throw new Error("bbox must be an Array");
+           if (!_mlyFallback && _mlyViewer) {
+             _mlyViewer.getComponent('sequence').stop();
            }
 
-           if (bbox.length !== 4 && bbox.length !== 6) {
-             throw new Error("bbox must be an Array of 4 or 6 numbers");
-           }
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(null);
+           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+           this.updateUrlImage(null);
+           dispatch$4.call('imageChanged');
+           dispatch$4.call('loadedMapFeatures');
+           dispatch$4.call('loadedSigns');
+           return this.setStyles(context, null);
+         },
+         // Update the URL with current image id
+         updateUrlImage: function updateUrlImage(imageId) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
 
-           bbox.forEach(function (num) {
-             if (!isNumber(num)) {
-               throw new Error("bbox must only contain numbers");
+             if (imageId) {
+               hash.photo = 'mapillary/' + imageId;
+             } else {
+               delete hash.photo;
              }
-           });
-         }
-
-         exports.validateBBox = validateBBox;
-         /**
-          * Validate Id
-          *
-          * @private
-          * @param {string|number} id Id to validate
-          * @returns {void}
-          * @throws Error if Id is not valid
-          * @example
-          * validateId([-180, -40, 110, 50])
-          * //=Error
-          * validateId([-180, -40])
-          * //=Error
-          * validateId('Foo')
-          * //=OK
-          * validateId(5)
-          * //=OK
-          * validateId(null)
-          * //=Error
-          * validateId(undefined)
-          * //=Error
-          */
 
-         function validateId(id) {
-           if (!id) {
-             throw new Error("id is required");
+             window.location.replace('#' + utilQsString(hash, true));
            }
-
-           if (["string", "number"].indexOf(_typeof(id)) === -1) {
-             throw new Error("id must be a number or a string");
+         },
+         // Highlight the detection in the viewer that is related to the clicked map feature
+         highlightDetection: function highlightDetection(detection) {
+           if (detection) {
+             _mlyHighlightedDetection = detection.id;
            }
-         }
-
-         exports.validateId = validateId; // Deprecated methods
-
-         function radians2degrees() {
-           throw new Error("method has been renamed to `radiansToDegrees`");
-         }
 
-         exports.radians2degrees = radians2degrees;
-
-         function degrees2radians() {
-           throw new Error("method has been renamed to `degreesToRadians`");
-         }
-
-         exports.degrees2radians = degrees2radians;
+           return this;
+         },
+         // Initialize image viewer (Mapillar JS)
+         initViewer: function initViewer(context) {
+           var that = this;
+           if (!window.mapillary) return;
+           var opts = {
+             accessToken: accessToken,
+             component: {
+               cover: false,
+               keyboard: false,
+               tag: true
+             },
+             container: 'ideditor-mly'
+           }; // Disable components requiring WebGL support
 
-         function distanceToDegrees() {
-           throw new Error("method has been renamed to `lengthToDegrees`");
-         }
+           if (!mapillary.isSupported() && mapillary.isFallbackSupported()) {
+             _mlyFallback = true;
+             opts.component = {
+               cover: false,
+               direction: false,
+               imagePlane: false,
+               keyboard: false,
+               mouse: false,
+               sequence: false,
+               tag: false,
+               image: true,
+               // fallback
+               navigation: true // fallback
 
-         exports.distanceToDegrees = distanceToDegrees;
+             };
+           }
 
-         function distanceToRadians() {
-           throw new Error("method has been renamed to `lengthToRadians`");
-         }
+           _mlyViewer = new mapillary.Viewer(opts);
 
-         exports.distanceToRadians = distanceToRadians;
+           _mlyViewer.on('image', imageChanged);
 
-         function radiansToDistance() {
-           throw new Error("method has been renamed to `radiansToLength`");
-         }
+           _mlyViewer.on('bearing', bearingChanged);
 
-         exports.radiansToDistance = radiansToDistance;
+           if (_mlyViewerFilter) {
+             _mlyViewer.setFilter(_mlyViewerFilter);
+           } // Register viewer resize handler
 
-         function bearingToAngle() {
-           throw new Error("method has been renamed to `bearingToAzimuth`");
-         }
 
-         exports.bearingToAngle = bearingToAngle;
+           context.ui().photoviewer.on('resize.mapillary', function () {
+             if (_mlyViewer) _mlyViewer.resize();
+           }); // imageChanged: called after the viewer has changed images and is ready.
 
-         function convertDistance() {
-           throw new Error("method has been renamed to `convertLength`");
-         }
+           function imageChanged(node) {
+             that.resetTags();
+             var image = node.image;
+             that.setActiveImage(image);
+             that.setStyles(context, null);
+             var loc = [image.originalLngLat.lng, image.originalLngLat.lat];
+             context.map().centerEase(loc);
+             that.updateUrlImage(image.id);
 
-         exports.convertDistance = convertDistance;
-       });
+             if (_mlyShowFeatureDetections || _mlyShowSignDetections) {
+               that.updateDetections(image.id, "".concat(apiUrl, "/").concat(image.id, "/detections?access_token=").concat(accessToken, "&fields=id,image,geometry,value"));
+             }
 
-       var invariant = createCommonjsModule(function (module, exports) {
+             dispatch$4.call('imageChanged');
+           } // bearingChanged: called when the bearing changes in the image viewer.
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
-         /**
-          * Unwrap a coordinate from a Point Feature, Geometry or a single coordinate.
-          *
-          * @name getCoord
-          * @param {Array<number>|Geometry<Point>|Feature<Point>} coord GeoJSON Point or an Array of numbers
-          * @returns {Array<number>} coordinates
-          * @example
-          * var pt = turf.point([10, 10]);
-          *
-          * var coord = turf.getCoord(pt);
-          * //= [10, 10]
-          */
 
-         function getCoord(coord) {
-           if (!coord) {
-             throw new Error("coord is required");
+           function bearingChanged(e) {
+             dispatch$4.call('bearingChanged', undefined, e);
            }
-
-           if (!Array.isArray(coord)) {
-             if (coord.type === "Feature" && coord.geometry !== null && coord.geometry.type === "Point") {
-               return coord.geometry.coordinates;
-             }
-
-             if (coord.type === "Point") {
-               return coord.coordinates;
-             }
+         },
+         // Move to an image
+         selectImage: function selectImage(context, imageId) {
+           if (_mlyViewer && imageId) {
+             _mlyViewer.moveTo(imageId)["catch"](function (e) {
+               console.error('mly3', e); // eslint-disable-line no-console
+             });
            }
 
-           if (Array.isArray(coord) && coord.length >= 2 && !Array.isArray(coord[0]) && !Array.isArray(coord[1])) {
-             return coord;
+           return this;
+         },
+         // Return the currently displayed image
+         getActiveImage: function getActiveImage() {
+           return _mlyActiveImage;
+         },
+         // Return a list of detection objects for the given id
+         getDetections: function getDetections(id) {
+           return loadData("".concat(apiUrl, "/").concat(id, "/detections?access_token=").concat(accessToken, "&fields=id,value,image"));
+         },
+         // Set the currently visible image
+         setActiveImage: function setActiveImage(image) {
+           if (image) {
+             _mlyActiveImage = {
+               ca: image.originalCompassAngle,
+               id: image.id,
+               loc: [image.originalLngLat.lng, image.originalLngLat.lat],
+               is_pano: image.cameraType === 'spherical',
+               sequence_id: image.sequenceId
+             };
+           } else {
+             _mlyActiveImage = null;
            }
+         },
+         // Update the currently highlighted sequence and selected bubble.
+         setStyles: function setStyles(context, hovered) {
+           var hoveredImageId = hovered && hovered.id;
+           var hoveredSequenceId = hovered && hovered.sequence_id;
+           var selectedSequenceId = _mlyActiveImage && _mlyActiveImage.sequence_id;
+           context.container().selectAll('.layer-mapillary .viewfield-group').classed('highlighted', function (d) {
+             return d.sequence_id === selectedSequenceId || d.id === hoveredImageId;
+           }).classed('hovered', function (d) {
+             return d.id === hoveredImageId;
+           });
+           context.container().selectAll('.layer-mapillary .sequence').classed('highlighted', function (d) {
+             return d.properties.id === hoveredSequenceId;
+           }).classed('currentView', function (d) {
+             return d.properties.id === selectedSequenceId;
+           });
+           return this;
+         },
+         // Get detections for the current image and shows them in the image viewer
+         updateDetections: function updateDetections(imageId, url) {
+           if (!_mlyViewer || _mlyFallback) return;
+           if (!imageId) return;
+           var cache = _mlyCache.image_detections;
 
-           throw new Error("coord must be GeoJSON Point or an Array of numbers");
-         }
+           if (cache.forImageId[imageId]) {
+             showDetections(_mlyCache.image_detections.forImageId[imageId]);
+           } else {
+             loadData(url).then(function (detections) {
+               detections.forEach(function (detection) {
+                 if (!cache.forImageId[imageId]) {
+                   cache.forImageId[imageId] = [];
+                 }
 
-         exports.getCoord = getCoord;
-         /**
-          * Unwrap coordinates from a Feature, Geometry Object or an Array
-          *
-          * @name getCoords
-          * @param {Array<any>|Geometry|Feature} coords Feature, Geometry Object or an Array
-          * @returns {Array<any>} coordinates
-          * @example
-          * var poly = turf.polygon([[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]);
-          *
-          * var coords = turf.getCoords(poly);
-          * //= [[[119.32, -8.7], [119.55, -8.69], [119.51, -8.54], [119.32, -8.7]]]
-          */
+                 cache.forImageId[imageId].push({
+                   geometry: detection.geometry,
+                   id: detection.id,
+                   image_id: imageId,
+                   value: detection.value
+                 });
+               });
+               showDetections(_mlyCache.image_detections.forImageId[imageId] || []);
+             });
+           } // Create a tag for each detection and shows it in the image viewer
 
-         function getCoords(coords) {
-           if (Array.isArray(coords)) {
-             return coords;
-           } // Feature
 
+           function showDetections(detections) {
+             var tagComponent = _mlyViewer.getComponent('tag');
 
-           if (coords.type === "Feature") {
-             if (coords.geometry !== null) {
-               return coords.geometry.coordinates;
-             }
-           } else {
-             // Geometry
-             if (coords.coordinates) {
-               return coords.coordinates;
-             }
-           }
+             detections.forEach(function (data) {
+               var tag = makeTag(data);
 
-           throw new Error("coords must be GeoJSON Feature, Geometry Object or an Array");
-         }
+               if (tag) {
+                 tagComponent.add([tag]);
+               }
+             });
+           } // Create a Mapillary JS tag object
 
-         exports.getCoords = getCoords;
-         /**
-          * Checks if coordinates contains a number
-          *
-          * @name containsNumber
-          * @param {Array<any>} coordinates GeoJSON Coordinates
-          * @returns {boolean} true if Array contains a number
-          */
 
-         function containsNumber(coordinates) {
-           if (coordinates.length > 1 && helpers$1.isNumber(coordinates[0]) && helpers$1.isNumber(coordinates[1])) {
-             return true;
-           }
+           function makeTag(data) {
+             var valueParts = data.value.split('--');
+             if (!valueParts.length) return;
+             var tag;
+             var text;
+             var color = 0xffffff;
 
-           if (Array.isArray(coordinates[0]) && coordinates[0].length) {
-             return containsNumber(coordinates[0]);
-           }
+             if (_mlyHighlightedDetection === data.id) {
+               color = 0xffff00;
+               text = valueParts[1];
 
-           throw new Error("coordinates must only contain numbers");
-         }
+               if (text === 'flat' || text === 'discrete' || text === 'sign') {
+                 text = valueParts[2];
+               }
 
-         exports.containsNumber = containsNumber;
-         /**
-          * Enforce expectations about types of GeoJSON objects for Turf.
-          *
-          * @name geojsonType
-          * @param {GeoJSON} value any GeoJSON object
-          * @param {string} type expected GeoJSON type
-          * @param {string} name name of calling function
-          * @throws {Error} if value is not the expected type.
-          */
+               text = text.replace(/-/g, ' ');
+               text = text.charAt(0).toUpperCase() + text.slice(1);
+               _mlyHighlightedDetection = null;
+             }
 
-         function geojsonType(value, type, name) {
-           if (!type || !name) {
-             throw new Error("type and name required");
-           }
+             var decodedGeometry = window.atob(data.geometry);
+             var uintArray = new Uint8Array(decodedGeometry.length);
+
+             for (var i = 0; i < decodedGeometry.length; i++) {
+               uintArray[i] = decodedGeometry.charCodeAt(i);
+             }
 
-           if (!value || value.type !== type) {
-             throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + value.type);
+             var tile = new VectorTile(new pbf(uintArray.buffer));
+             var layer = tile.layers['mpy-or'];
+             var geometries = layer.feature(0).loadGeometry();
+             var polygon = geometries.map(function (ring) {
+               return ring.map(function (point) {
+                 return [point.x / layer.extent, point.y / layer.extent];
+               });
+             });
+             tag = new mapillary.OutlineTag(data.id, new mapillary.PolygonGeometry(polygon[0]), {
+               text: text,
+               textColor: color,
+               lineColor: color,
+               lineWidth: 2,
+               fillColor: color,
+               fillOpacity: 0.3
+             });
+             return tag;
            }
+         },
+         // Return the current cache
+         cache: function cache() {
+           return _mlyCache;
          }
+       };
 
-         exports.geojsonType = geojsonType;
-         /**
-          * Enforce expectations about types of {@link Feature} inputs for Turf.
-          * Internally this uses {@link geojsonType} to judge geometry types.
-          *
-          * @name featureOf
-          * @param {Feature} feature a feature with an expected geometry type
-          * @param {string} type expected GeoJSON type
-          * @param {string} name name of calling function
-          * @throws {Error} error if value is not the expected type.
-          */
+       function validationIssue(attrs) {
+         this.type = attrs.type; // required - name of rule that created the issue (e.g. 'missing_tag')
 
-         function featureOf(feature, type, name) {
-           if (!feature) {
-             throw new Error("No feature passed");
-           }
+         this.subtype = attrs.subtype; // optional - category of the issue within the type (e.g. 'relation_type' under 'missing_tag')
 
-           if (!name) {
-             throw new Error(".featureOf() requires a name");
-           }
+         this.severity = attrs.severity; // required - 'warning' or 'error'
 
-           if (!feature || feature.type !== "Feature" || !feature.geometry) {
-             throw new Error("Invalid input to " + name + ", Feature with geometry required");
-           }
+         this.message = attrs.message; // required - function returning localized string
 
-           if (!feature.geometry || feature.geometry.type !== type) {
-             throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
-           }
-         }
+         this.reference = attrs.reference; // optional - function(selection) to render reference information
 
-         exports.featureOf = featureOf;
-         /**
-          * Enforce expectations about types of {@link FeatureCollection} inputs for Turf.
-          * Internally this uses {@link geojsonType} to judge geometry types.
-          *
-          * @name collectionOf
-          * @param {FeatureCollection} featureCollection a FeatureCollection for which features will be judged
-          * @param {string} type expected GeoJSON type
-          * @param {string} name name of calling function
-          * @throws {Error} if value is not the expected type.
-          */
+         this.entityIds = attrs.entityIds; // optional - array of IDs of entities involved in the issue
 
-         function collectionOf(featureCollection, type, name) {
-           if (!featureCollection) {
-             throw new Error("No featureCollection passed");
-           }
+         this.loc = attrs.loc; // optional - [lon, lat] to zoom in on to see the issue
 
-           if (!name) {
-             throw new Error(".collectionOf() requires a name");
-           }
+         this.data = attrs.data; // optional - object containing extra data for the fixes
 
-           if (!featureCollection || featureCollection.type !== "FeatureCollection") {
-             throw new Error("Invalid input to " + name + ", FeatureCollection required");
-           }
+         this.dynamicFixes = attrs.dynamicFixes; // optional - function(context) returning fixes
 
-           for (var _i = 0, _a = featureCollection.features; _i < _a.length; _i++) {
-             var feature = _a[_i];
+         this.hash = attrs.hash; // optional - string to further differentiate the issue
 
-             if (!feature || feature.type !== "Feature" || !feature.geometry) {
-               throw new Error("Invalid input to " + name + ", Feature with geometry required");
-             }
+         this.id = generateID.apply(this); // generated - see below
 
-             if (!feature.geometry || feature.geometry.type !== type) {
-               throw new Error("Invalid input to " + name + ": must be a " + type + ", given " + feature.geometry.type);
-             }
-           }
-         }
+         this.key = generateKey.apply(this); // generated - see below (call after generating this.id)
 
-         exports.collectionOf = collectionOf;
-         /**
-          * Get Geometry from Feature or Geometry Object
-          *
-          * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
-          * @returns {Geometry|null} GeoJSON Geometry Object
-          * @throws {Error} if geojson is not a Feature or Geometry Object
-          * @example
-          * var point = {
-          *   "type": "Feature",
-          *   "properties": {},
-          *   "geometry": {
-          *     "type": "Point",
-          *     "coordinates": [110, 40]
-          *   }
-          * }
-          * var geom = turf.getGeom(point)
-          * //={"type": "Point", "coordinates": [110, 40]}
-          */
+         this.autoFix = null; // generated - if autofix exists, will be set below
+         // A unique, deterministic string hash.
+         // Issues with identical id values are considered identical.
+
+         function generateID() {
+           var parts = [this.type];
 
-         function getGeom(geojson) {
-           if (geojson.type === "Feature") {
-             return geojson.geometry;
+           if (this.hash) {
+             // subclasses can pass in their own differentiator
+             parts.push(this.hash);
            }
 
-           return geojson;
-         }
+           if (this.subtype) {
+             parts.push(this.subtype);
+           } // include the entities this issue is for
+           // (sort them so the id is deterministic)
 
-         exports.getGeom = getGeom;
-         /**
-          * Get GeoJSON object's type, Geometry type is prioritize.
-          *
-          * @param {GeoJSON} geojson GeoJSON object
-          * @param {string} [name="geojson"] name of the variable to display in error message
-          * @returns {string} GeoJSON type
-          * @example
-          * var point = {
-          *   "type": "Feature",
-          *   "properties": {},
-          *   "geometry": {
-          *     "type": "Point",
-          *     "coordinates": [110, 40]
-          *   }
-          * }
-          * var geom = turf.getType(point)
-          * //="Point"
-          */
 
-         function getType(geojson, name) {
-           if (geojson.type === "FeatureCollection") {
-             return "FeatureCollection";
+           if (this.entityIds) {
+             var entityKeys = this.entityIds.slice().sort();
+             parts.push.apply(parts, entityKeys);
            }
 
-           if (geojson.type === "GeometryCollection") {
-             return "GeometryCollection";
-           }
+           return parts.join(':');
+         } // An identifier suitable for use as the second argument to d3.selection#data().
+         // (i.e. this should change whenever the data needs to be refreshed)
 
-           if (geojson.type === "Feature" && geojson.geometry !== null) {
-             return geojson.geometry.type;
-           }
 
-           return geojson.type;
+         function generateKey() {
+           return this.id + ':' + Date.now().toString(); // include time of creation
          }
 
-         exports.getType = getType;
-       });
-
-       var lineclip_1 = lineclip;
-       var _default = lineclip;
-       lineclip.polyline = lineclip;
-       lineclip.polygon = polygonclip; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
-       // handle polylines rather than just segments
-
-       function lineclip(points, bbox, result) {
-         var len = points.length,
-             codeA = bitCode(points[0], bbox),
-             part = [],
-             i,
-             a,
-             b,
-             codeB,
-             lastCode;
-         if (!result) result = [];
+         this.extent = function (resolver) {
+           if (this.loc) {
+             return geoExtent(this.loc);
+           }
 
-         for (i = 1; i < len; i++) {
-           a = points[i - 1];
-           b = points[i];
-           codeB = lastCode = bitCode(b, bbox);
+           if (this.entityIds && this.entityIds.length) {
+             return this.entityIds.reduce(function (extent, entityId) {
+               return extent.extend(resolver.entity(entityId).extent(resolver));
+             }, geoExtent());
+           }
 
-           while (true) {
-             if (!(codeA | codeB)) {
-               // accept
-               part.push(a);
+           return null;
+         };
 
-               if (codeB !== lastCode) {
-                 // segment went outside
-                 part.push(b);
+         this.fixes = function (context) {
+           var fixes = this.dynamicFixes ? this.dynamicFixes(context) : [];
+           var issue = this;
 
-                 if (i < len - 1) {
-                   // start a new line
-                   result.push(part);
-                   part = [];
-                 }
-               } else if (i === len - 1) {
-                 part.push(b);
+           if (issue.severity === 'warning') {
+             // allow ignoring any issue that's not an error
+             fixes.push(new validationIssueFix({
+               title: _t.html('issues.fix.ignore_issue.title'),
+               icon: 'iD-icon-close',
+               onClick: function onClick() {
+                 context.validator().ignoreIssue(this.issue.id);
                }
-
-               break;
-             } else if (codeA & codeB) {
-               // trivial reject
-               break;
-             } else if (codeA) {
-               // a outside, intersect with clip edge
-               a = intersect(a, b, codeA, bbox);
-               codeA = bitCode(a, bbox);
-             } else {
-               // b outside
-               b = intersect(a, b, codeB, bbox);
-               codeB = bitCode(b, bbox);
-             }
+             }));
            }
 
-           codeA = lastCode;
-         }
-
-         if (part.length) result.push(part);
-         return result;
-       } // Sutherland-Hodgeman polygon clipping algorithm
-
-
-       function polygonclip(points, bbox) {
-         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
+           fixes.forEach(function (fix) {
+             // the id doesn't matter as long as it's unique to this issue/fix
+             fix.id = fix.title; // add a reference to the issue for use in actions
 
-         for (edge = 1; edge <= 8; edge *= 2) {
-           result = [];
-           prev = points[points.length - 1];
-           prevInside = !(bitCode(prev, bbox) & edge);
+             fix.issue = issue;
 
-           for (i = 0; i < points.length; i++) {
-             p = points[i];
-             inside = !(bitCode(p, bbox) & edge); // if segment goes through the clip window, add an intersection
+             if (fix.autoArgs) {
+               issue.autoFix = fix;
+             }
+           });
+           return fixes;
+         };
+       }
+       function validationIssueFix(attrs) {
+         this.title = attrs.title; // Required
 
-             if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
-             if (inside) result.push(p); // add a point if it's inside
+         this.onClick = attrs.onClick; // Optional - the function to run to apply the fix
 
-             prev = p;
-             prevInside = inside;
-           }
+         this.disabledReason = attrs.disabledReason; // Optional - a string explaining why the fix is unavailable, if any
 
-           points = result;
-           if (!points.length) break;
-         }
+         this.icon = attrs.icon; // Optional - shows 'iD-icon-wrench' if not set
 
-         return result;
-       } // intersect a segment against one of the 4 lines that make up the bbox
+         this.entityIds = attrs.entityIds || []; // Optional - used for hover-higlighting.
 
+         this.autoArgs = attrs.autoArgs; // Optional - pass [actions, annotation] arglist if this fix can automatically run
 
-       function intersect(a, b, edge, bbox) {
-         return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-         edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-         edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-         edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-         null;
-       } // bit code reflects the point position relative to the bbox:
-       //         left  mid  right
-       //    top  1001  1000  1010
-       //    mid  0001  0000  0010
-       // bottom  0101  0100  0110
+         this.issue = null; // Generated link - added by validationIssue
+       }
 
+       var buildRuleChecks = function buildRuleChecks() {
+         return {
+           equals: function equals(_equals) {
+             return function (tags) {
+               return Object.keys(_equals).every(function (k) {
+                 return _equals[k] === tags[k];
+               });
+             };
+           },
+           notEquals: function notEquals(_notEquals) {
+             return function (tags) {
+               return Object.keys(_notEquals).some(function (k) {
+                 return _notEquals[k] !== tags[k];
+               });
+             };
+           },
+           absence: function absence(_absence) {
+             return function (tags) {
+               return Object.keys(tags).indexOf(_absence) === -1;
+             };
+           },
+           presence: function presence(_presence) {
+             return function (tags) {
+               return Object.keys(tags).indexOf(_presence) > -1;
+             };
+           },
+           greaterThan: function greaterThan(_greaterThan) {
+             var key = Object.keys(_greaterThan)[0];
+             var value = _greaterThan[key];
+             return function (tags) {
+               return tags[key] > value;
+             };
+           },
+           greaterThanEqual: function greaterThanEqual(_greaterThanEqual) {
+             var key = Object.keys(_greaterThanEqual)[0];
+             var value = _greaterThanEqual[key];
+             return function (tags) {
+               return tags[key] >= value;
+             };
+           },
+           lessThan: function lessThan(_lessThan) {
+             var key = Object.keys(_lessThan)[0];
+             var value = _lessThan[key];
+             return function (tags) {
+               return tags[key] < value;
+             };
+           },
+           lessThanEqual: function lessThanEqual(_lessThanEqual) {
+             var key = Object.keys(_lessThanEqual)[0];
+             var value = _lessThanEqual[key];
+             return function (tags) {
+               return tags[key] <= value;
+             };
+           },
+           positiveRegex: function positiveRegex(_positiveRegex) {
+             var tagKey = Object.keys(_positiveRegex)[0];
 
-       function bitCode(p, bbox) {
-         var code = 0;
-         if (p[0] < bbox[0]) code |= 1; // left
-         else if (p[0] > bbox[2]) code |= 2; // right
+             var expression = _positiveRegex[tagKey].join('|');
 
-         if (p[1] < bbox[1]) code |= 4; // bottom
-         else if (p[1] > bbox[3]) code |= 8; // top
+             var regex = new RegExp(expression);
+             return function (tags) {
+               return regex.test(tags[tagKey]);
+             };
+           },
+           negativeRegex: function negativeRegex(_negativeRegex) {
+             var tagKey = Object.keys(_negativeRegex)[0];
 
-         return code;
-       }
-       lineclip_1["default"] = _default;
+             var expression = _negativeRegex[tagKey].join('|');
 
-       var bboxClip_1 = createCommonjsModule(function (module, exports) {
+             var regex = new RegExp(expression);
+             return function (tags) {
+               return !regex.test(tags[tagKey]);
+             };
+           }
+         };
+       };
 
-         var __importStar = commonjsGlobal && commonjsGlobal.__importStar || function (mod) {
-           if (mod && mod.__esModule) return mod;
-           var result = {};
-           if (mod != null) for (var k in mod) {
-             if (Object.hasOwnProperty.call(mod, k)) result[k] = mod[k];
+       var buildLineKeys = function buildLineKeys() {
+         return {
+           highway: {
+             rest_area: true,
+             services: true
+           },
+           railway: {
+             roundhouse: true,
+             station: true,
+             traverser: true,
+             turntable: true,
+             wash: true
            }
-           result["default"] = mod;
-           return result;
          };
+       };
+
+       var serviceMapRules = {
+         init: function init() {
+           this._ruleChecks = buildRuleChecks();
+           this._validationRules = [];
+           this._areaKeys = osmAreaKeys;
+           this._lineKeys = buildLineKeys();
+         },
+         // list of rules only relevant to tag checks...
+         filterRuleChecks: function filterRuleChecks(selector) {
+           var _ruleChecks = this._ruleChecks;
+           return Object.keys(selector).reduce(function (rules, key) {
+             if (['geometry', 'error', 'warning'].indexOf(key) === -1) {
+               rules.push(_ruleChecks[key](selector[key]));
+             }
 
-         Object.defineProperty(exports, "__esModule", {
-           value: true
-         });
+             return rules;
+           }, []);
+         },
+         // builds tagMap from mapcss-parse selector object...
+         buildTagMap: function buildTagMap(selector) {
+           var getRegexValues = function getRegexValues(regexes) {
+             return regexes.map(function (regex) {
+               return regex.replace(/\$|\^/g, '');
+             });
+           };
 
-         var lineclip = __importStar(lineclip_1);
-         /**
-          * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
-          * [lineclip](https://github.com/mapbox/lineclip).
-          * May result in degenerate edges when clipping Polygons.
-          *
-          * @name bboxClip
-          * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
-          * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
-          * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
-          * @example
-          * var bbox = [0, 0, 10, 10];
-          * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
-          *
-          * var clipped = turf.bboxClip(poly, bbox);
-          *
-          * //addToMap
-          * var addToMap = [bbox, poly, clipped]
-          */
+           var tagMap = Object.keys(selector).reduce(function (expectedTags, key) {
+             var values;
+             var isRegex = /regex/gi.test(key);
+             var isEqual = /equals/gi.test(key);
 
+             if (isRegex || isEqual) {
+               Object.keys(selector[key]).forEach(function (selectorKey) {
+                 values = isEqual ? [selector[key][selectorKey]] : getRegexValues(selector[key][selectorKey]);
 
-         function bboxClip(feature, bbox) {
-           var geom = invariant.getGeom(feature);
-           var type = geom.type;
-           var properties = feature.type === "Feature" ? feature.properties : {};
-           var coords = geom.coordinates;
+                 if (expectedTags.hasOwnProperty(selectorKey)) {
+                   values = values.concat(expectedTags[selectorKey]);
+                 }
 
-           switch (type) {
-             case "LineString":
-             case "MultiLineString":
-               var lines_1 = [];
+                 expectedTags[selectorKey] = values;
+               });
+             } else if (/(greater|less)Than(Equal)?|presence/g.test(key)) {
+               var tagKey = /presence/.test(key) ? selector[key] : Object.keys(selector[key])[0];
+               values = [selector[key][tagKey]];
 
-               if (type === "LineString") {
-                 coords = [coords];
+               if (expectedTags.hasOwnProperty(tagKey)) {
+                 values = values.concat(expectedTags[tagKey]);
                }
 
-               coords.forEach(function (line) {
-                 lineclip.polyline(line, bbox, lines_1);
-               });
+               expectedTags[tagKey] = values;
+             }
 
-               if (lines_1.length === 1) {
-                 return helpers$1.lineString(lines_1[0], properties);
-               }
+             return expectedTags;
+           }, {});
+           return tagMap;
+         },
+         // inspired by osmWay#isArea()
+         inferGeometry: function inferGeometry(tagMap) {
+           var _lineKeys = this._lineKeys;
+           var _areaKeys = this._areaKeys;
 
-               return helpers$1.multiLineString(lines_1, properties);
+           var keyValueDoesNotImplyArea = function keyValueDoesNotImplyArea(key) {
+             return utilArrayIntersection(tagMap[key], Object.keys(_areaKeys[key])).length > 0;
+           };
 
-             case "Polygon":
-               return helpers$1.polygon(clipPolygon(coords, bbox), properties);
+           var keyValueImpliesLine = function keyValueImpliesLine(key) {
+             return utilArrayIntersection(tagMap[key], Object.keys(_lineKeys[key])).length > 0;
+           };
 
-             case "MultiPolygon":
-               return helpers$1.multiPolygon(coords.map(function (poly) {
-                 return clipPolygon(poly, bbox);
-               }), properties);
+           if (tagMap.hasOwnProperty('area')) {
+             if (tagMap.area.indexOf('yes') > -1) {
+               return 'area';
+             }
 
-             default:
-               throw new Error("geometry " + type + " not supported");
+             if (tagMap.area.indexOf('no') > -1) {
+               return 'line';
+             }
            }
-         }
 
-         exports["default"] = bboxClip;
-
-         function clipPolygon(rings, bbox) {
-           var outRings = [];
+           for (var key in tagMap) {
+             if (key in _areaKeys && !keyValueDoesNotImplyArea(key)) {
+               return 'area';
+             }
 
-           for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
-             var ring = rings_1[_i];
-             var clipped = lineclip.polygon(ring, bbox);
+             if (key in _lineKeys && keyValueImpliesLine(key)) {
+               return 'area';
+             }
+           }
 
-             if (clipped.length > 0) {
-               if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
-                 clipped.push(clipped[0]);
+           return 'line';
+         },
+         // adds from mapcss-parse selector check...
+         addRule: function addRule(selector) {
+           var rule = {
+             // checks relevant to mapcss-selector
+             checks: this.filterRuleChecks(selector),
+             // true if all conditions for a tag error are true..
+             matches: function matches(entity) {
+               return this.checks.every(function (check) {
+                 return check(entity.tags);
+               });
+             },
+             // borrowed from Way#isArea()
+             inferredGeometry: this.inferGeometry(this.buildTagMap(selector), this._areaKeys),
+             geometryMatches: function geometryMatches(entity, graph) {
+               if (entity.type === 'node' || entity.type === 'relation') {
+                 return selector.geometry === entity.type;
+               } else if (entity.type === 'way') {
+                 return this.inferredGeometry === entity.geometry(graph);
                }
-
-               if (clipped.length >= 4) {
-                 outRings.push(clipped);
+             },
+             // when geometries match and tag matches are present, return a warning...
+             findIssues: function findIssues(entity, graph, issues) {
+               if (this.geometryMatches(entity, graph) && this.matches(entity)) {
+                 var severity = Object.keys(selector).indexOf('error') > -1 ? 'error' : 'warning';
+                 var _message = selector[severity];
+                 issues.push(new validationIssue({
+                   type: 'maprules',
+                   severity: severity,
+                   message: function message() {
+                     return _message;
+                   },
+                   entityIds: [entity.id]
+                 }));
                }
              }
-           }
+           };
 
-           return outRings;
+           this._validationRules.push(rule);
+         },
+         clearRules: function clearRules() {
+           this._validationRules = [];
+         },
+         // returns validationRules...
+         validationRules: function validationRules() {
+           return this._validationRules;
+         },
+         // returns ruleChecks
+         ruleChecks: function ruleChecks() {
+           return this._ruleChecks;
          }
-       });
-       var turf_bboxClip = /*@__PURE__*/getDefaultExportFromCjs(bboxClip_1);
+       };
 
-       var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
-         if (!opts) opts = {};
-         if (typeof opts === 'function') opts = {
-           cmp: opts
-         };
-         var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;
+       var apibase$2 = 'https://nominatim.openstreetmap.org/';
+       var _inflight$2 = {};
 
-         var cmp = opts.cmp && function (f) {
-           return function (node) {
-             return function (a, b) {
-               var aobj = {
-                 key: a,
-                 value: node[a]
-               };
-               var bobj = {
-                 key: b,
-                 value: node[b]
-               };
-               return f(aobj, bobj);
-             };
-           };
-         }(opts.cmp);
+       var _nominatimCache;
 
-         var seen = [];
-         return function stringify(node) {
-           if (node && node.toJSON && typeof node.toJSON === 'function') {
-             node = node.toJSON();
+       var serviceNominatim = {
+         init: function init() {
+           _inflight$2 = {};
+           _nominatimCache = new RBush();
+         },
+         reset: function reset() {
+           Object.values(_inflight$2).forEach(function (controller) {
+             controller.abort();
+           });
+           _inflight$2 = {};
+           _nominatimCache = new RBush();
+         },
+         countryCode: function countryCode(location, callback) {
+           this.reverse(location, function (err, result) {
+             if (err) {
+               return callback(err);
+             } else if (result.address) {
+               return callback(null, result.address.country_code);
+             } else {
+               return callback('Unable to geocode', null);
+             }
+           });
+         },
+         reverse: function reverse(loc, callback) {
+           var cached = _nominatimCache.search({
+             minX: loc[0],
+             minY: loc[1],
+             maxX: loc[0],
+             maxY: loc[1]
+           });
+
+           if (cached.length > 0) {
+             if (callback) callback(null, cached[0].data);
+             return;
            }
 
-           if (node === undefined) return;
-           if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
-           if (_typeof(node) !== 'object') return JSON.stringify(node);
-           var i, out;
+           var params = {
+             zoom: 13,
+             format: 'json',
+             addressdetails: 1,
+             lat: loc[1],
+             lon: loc[0]
+           };
+           var url = apibase$2 + 'reverse?' + utilQsString(params);
+           if (_inflight$2[url]) return;
+           var controller = new AbortController();
+           _inflight$2[url] = controller;
+           d3_json(url, {
+             signal: controller.signal
+           }).then(function (result) {
+             delete _inflight$2[url];
 
-           if (Array.isArray(node)) {
-             out = '[';
+             if (result && result.error) {
+               throw new Error(result.error);
+             }
 
-             for (i = 0; i < node.length; i++) {
-               if (i) out += ',';
-               out += stringify(node[i]) || 'null';
+             var extent = geoExtent(loc).padByMeters(200);
+
+             _nominatimCache.insert(Object.assign(extent.bbox(), {
+               data: result
+             }));
+
+             if (callback) callback(null, result);
+           })["catch"](function (err) {
+             delete _inflight$2[url];
+             if (err.name === 'AbortError') return;
+             if (callback) callback(err.message);
+           });
+         },
+         search: function search(val, callback) {
+           var searchVal = encodeURIComponent(val);
+           var url = apibase$2 + 'search/' + searchVal + '?limit=10&format=json';
+           if (_inflight$2[url]) return;
+           var controller = new AbortController();
+           _inflight$2[url] = controller;
+           d3_json(url, {
+             signal: controller.signal
+           }).then(function (result) {
+             delete _inflight$2[url];
+
+             if (result && result.error) {
+               throw new Error(result.error);
              }
 
-             return out + ']';
-           }
+             if (callback) callback(null, result);
+           })["catch"](function (err) {
+             delete _inflight$2[url];
+             if (err.name === 'AbortError') return;
+             if (callback) callback(err.message);
+           });
+         }
+       };
 
-           if (node === null) return 'null';
+       // for punction see https://stackoverflow.com/a/21224179
 
-           if (seen.indexOf(node) !== -1) {
-             if (cycles) return JSON.stringify('__cycle__');
-             throw new TypeError('Converting circular structure to JSON');
-           }
+       function simplify$1(str) {
+         if (typeof str !== 'string') return '';
+         return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i') // for BİM, İşbank - #5017
+         .replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2000-\u206f\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00-\u2e7f\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
+       }
 
-           var seenIndex = seen.push(node) - 1;
-           var keys = Object.keys(node).sort(cmp && cmp(node));
-           out = '';
+       var matchGroups$1 = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beer","shop/beverages","shop/wine"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],clinic:["amenity/clinic","amenity/doctors","healthcare/clinic","healthcare/dialysis"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/grocery","shop/newsagent","shop/perfumery"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],dentist:["amenity/dentist","amenity/doctors","healthcare/dentist"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fabric:["shop/fabric","shop/haberdashery","shop/sewing"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/pub","amenity/bar","amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/bathroom_furnishing","shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/hardware_store","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],hobby:["shop/electronics","shop/hobby","shop/books","shop/games","shop/collector","shop/toys","shop/model","shop/video_games","shop/anime"],hospital:["amenity/doctors","amenity/hospital","healthcare/hospital"],houseware:["shop/houseware","shop/interior_decoration"],lifeboat_station:["amenity/lifeboat_station","emergency/lifeboat_station","emergency/marine_rescue"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],office_supplies:["shop/office_supplies","shop/stationary","shop/stationery"],outdoor:["shop/outdoor","shop/sports"],pharmacy:["amenity/doctors","amenity/pharmacy","healthcare/pharmacy"],playground:["amenity/theme_park","leisure/amusement_arcade","leisure/playground"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],storage:["shop/storage_units","shop/storage_rental"],substation:["power/station","power/substation","power/sub_station"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],weight_loss:["amenity/doctors","amenity/weight_clinic","healthcare/counselling","leisure/fitness_centre","office/therapist","shop/beauty","shop/diet","shop/food","shop/health_food","shop/herbalist","shop/nutrition","shop/nutrition_supplements","shop/weight_loss"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
+       var matchGroupsJSON = {
+       matchGroups: matchGroups$1
+       };
 
-           for (i = 0; i < keys.length; i++) {
-             var key = keys[i];
-             var value = stringify(node[key]);
-             if (!value) continue;
-             if (out) out += ',';
-             out += JSON.stringify(key) + ':' + value;
-           }
+       var genericWords = ["^(barn|bazaa?r|bench|bou?tique|building|casa|church)$","^(baseball|basketball|football|soccer|softball|tennis(halle)?)\\s?(field|court)?$","^(club|green|out|ware)\\s?house$","^(driveway|el árbol|fountain|golf|government|graveyard)$","^(fixme|n\\s?\\/?\\s?a|name|no\\s?name|none|null|temporary|test|unknown)$","^(hofladen|librairie|magazine?|maison)$","^(mobile home|skate)?\\s?park$","^(obuwie|pond|pool|sale|shops?|sklep|stores?)$","^\\?+$","^private$","^tattoo( studio)?$","^windmill$","^церковная( лавка)?$"];
+       var genericWordsJSON = {
+       genericWords: genericWords
+       };
 
-           seen.splice(seenIndex, 1);
-           return '{' + out + '}';
-         }(data);
+       var trees$1 = {brands:{emoji:"🍔",mainTag:"brand:wikidata",sourceTags:["brand","name"],nameTags:{primary:"^(name|name:\\w+)$",alternate:"^(brand|brand:\\w+|operator|operator:\\w+|\\w+_name|\\w+_name:\\w+)$"}},flags:{emoji:"🚩",mainTag:"flag:wikidata",nameTags:{primary:"^(flag:name|flag:name:\\w+)$",alternate:"^(country|country:\\w+|flag|flag:\\w+|subject|subject:\\w+)$"}},operators:{emoji:"💼",mainTag:"operator:wikidata",sourceTags:["operator"],nameTags:{primary:"^(name|name:\\w+|operator|operator:\\w+)$",alternate:"^(brand|brand:\\w+|\\w+_name|\\w+_name:\\w+)$"}},transit:{emoji:"🚇",mainTag:"network:wikidata",sourceTags:["network"],nameTags:{primary:"^network$",alternate:"^(operator|operator:\\w+|network:\\w+|\\w+_name|\\w+_name:\\w+)$"}}};
+       var treesJSON = {
+       trees: trees$1
        };
 
-       function DEFAULT_COMPARE(a, b) {
-         return a > b ? 1 : a < b ? -1 : 0;
-       }
+       var matchGroups = matchGroupsJSON.matchGroups;
+       var trees = treesJSON.trees;
+       var Matcher = /*#__PURE__*/function () {
+         //
+         // `constructor`
+         // initialize the genericWords regexes
+         function Matcher() {
+           var _this = this;
 
-       var SplayTree = /*#__PURE__*/function () {
-         function SplayTree() {
-           var compare = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : DEFAULT_COMPARE;
-           var noDuplicates = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : false;
+           _classCallCheck$1(this, Matcher);
 
-           _classCallCheck(this, SplayTree);
+           // The `matchIndex` is a specialized structure that allows us to quickly answer
+           //   _"Given a [key/value tagpair, name, location], what canonical items (brands etc) can match it?"_
+           //
+           // The index contains all valid combinations of k/v tagpairs and names
+           // matchIndex:
+           // {
+           //   'k/v': {
+           //     'primary':         Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `name`, `name:xx`, etc.
+           //     'alternate':       Map (String 'nsimple' -> Set (itemIDs…),   // matches for tags like `alt_name`, `brand`, etc.
+           //     'excludeNamed':    Map (String 'pattern' -> RegExp),
+           //     'excludeGeneric':  Map (String 'pattern' -> RegExp)
+           //   },
+           // }
+           //
+           // {
+           //   'amenity/bank': {
+           //     'primary': {
+           //       'firstbank':              Set ("firstbank-978cca", "firstbank-9794e6", "firstbank-f17495", …),
+           //       …
+           //     },
+           //     'alternate': {
+           //       '1stbank':                Set ("firstbank-f17495"),
+           //       …
+           //     }
+           //   },
+           //   'shop/supermarket': {
+           //     'primary': {
+           //       'coop':                   Set ("coop-76454b", "coop-ebf2d9", "coop-36e991", …),
+           //       'coopfood':               Set ("coopfood-a8278b", …),
+           //       …
+           //     },
+           //     'alternate': {
+           //       'coop':                   Set ("coopfood-a8278b", …),
+           //       'federatedcooperatives':  Set ("coop-76454b", …),
+           //       'thecooperative':         Set ("coopfood-a8278b", …),
+           //       …
+           //     }
+           //   }
+           // }
+           //
+           this.matchIndex = undefined; // The `genericWords` structure matches the contents of genericWords.json to instantiated RegExp objects
+           // Map (String 'pattern' -> RegExp),
+
+           this.genericWords = new Map();
+           (genericWordsJSON.genericWords || []).forEach(function (s) {
+             return _this.genericWords.set(s, new RegExp(s, 'i'));
+           }); // The `itemLocation` structure maps itemIDs to locationSetIDs:
+           // {
+           //   'firstbank-f17495':  '+[first_bank_western_us.geojson]',
+           //   'firstbank-978cca':  '+[first_bank_carolinas.geojson]',
+           //   'coop-76454b':       '+[Q16]',
+           //   'coopfood-a8278b':   '+[Q23666]',
+           //   …
+           // }
 
-           this._compare = compare;
-           this._root = null;
-           this._size = 0;
-           this._noDuplicates = !!noDuplicates;
-         }
+           this.itemLocation = undefined; // The `locationSets` structure maps locationSetIDs to *resolved* locationSets:
+           // {
+           //   '+[first_bank_western_us.geojson]':  GeoJSON {…},
+           //   '+[first_bank_carolinas.geojson]':   GeoJSON {…},
+           //   '+[Q16]':                            GeoJSON {…},
+           //   '+[Q23666]':                         GeoJSON {…},
+           //   …
+           // }
 
-         _createClass(SplayTree, [{
-           key: "rotateLeft",
-           value: function rotateLeft(x) {
-             var y = x.right;
+           this.locationSets = undefined; // The `locationIndex` is an instance of which-polygon spatial index for the locationSets.
 
-             if (y) {
-               x.right = y.left;
-               if (y.left) y.left.parent = x;
-               y.parent = x.parent;
-             }
+           this.locationIndex = undefined; // Array of match conflict pairs (currently unused)
 
-             if (!x.parent) this._root = y;else if (x === x.parent.left) x.parent.left = y;else x.parent.right = y;
-             if (y) y.left = x;
-             x.parent = y;
-           }
-         }, {
-           key: "rotateRight",
-           value: function rotateRight(x) {
-             var y = x.left;
+           this.warnings = [];
+         } //
+         // `buildMatchIndex()`
+         // Call this to prepare the matcher for use
+         //
+         // `data` needs to be an Object indexed on a 'tree/key/value' path.
+         // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
+         // {
+         //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
+         //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
+         //    …
+         // }
+         //
 
-             if (y) {
-               x.left = y.right;
-               if (y.right) y.right.parent = x;
-               y.parent = x.parent;
-             }
 
-             if (!x.parent) this._root = y;else if (x === x.parent.left) x.parent.left = y;else x.parent.right = y;
-             if (y) y.right = x;
-             x.parent = y;
-           }
-         }, {
-           key: "_splay",
-           value: function _splay(x) {
-             while (x.parent) {
-               var p = x.parent;
-
-               if (!p.parent) {
-                 if (p.left === x) this.rotateRight(p);else this.rotateLeft(p);
-               } else if (p.left === x && p.parent.left === p) {
-                 this.rotateRight(p.parent);
-                 this.rotateRight(p);
-               } else if (p.right === x && p.parent.right === p) {
-                 this.rotateLeft(p.parent);
-                 this.rotateLeft(p);
-               } else if (p.left === x && p.parent.right === p) {
-                 this.rotateRight(p);
-                 this.rotateLeft(p);
-               } else {
-                 this.rotateLeft(p);
-                 this.rotateRight(p);
-               }
-             }
-           }
-         }, {
-           key: "splay",
-           value: function splay(x) {
-             var p, gp, ggp, l, r;
-
-             while (x.parent) {
-               p = x.parent;
-               gp = p.parent;
-
-               if (gp && gp.parent) {
-                 ggp = gp.parent;
-                 if (ggp.left === gp) ggp.left = x;else ggp.right = x;
-                 x.parent = ggp;
-               } else {
-                 x.parent = null;
-                 this._root = x;
-               }
+         _createClass$1(Matcher, [{
+           key: "buildMatchIndex",
+           value: function buildMatchIndex(data) {
+             var that = this;
+             if (that.matchIndex) return; // it was built already
+
+             that.matchIndex = new Map();
+             var seenTree = new Map(); // warn if the same [k, v, nsimple] appears in multiple trees - #5625
+
+             Object.keys(data).forEach(function (tkv) {
+               var category = data[tkv];
+               var parts = tkv.split('/', 3); // tkv = "tree/key/value"
+
+               var t = parts[0];
+               var k = parts[1];
+               var v = parts[2];
+               var thiskv = "".concat(k, "/").concat(v);
+               var tree = trees[t];
+               var branch = that.matchIndex.get(thiskv);
+
+               if (!branch) {
+                 branch = {
+                   primary: new Map(),
+                   alternate: new Map(),
+                   excludeGeneric: new Map(),
+                   excludeNamed: new Map()
+                 };
+                 that.matchIndex.set(thiskv, branch);
+               } // ADD EXCLUSIONS
 
-               l = x.left;
-               r = x.right;
 
-               if (x === p.left) {
-                 // left
-                 if (gp) {
-                   if (gp.left === p) {
-                     /* zig-zig */
-                     if (p.right) {
-                       gp.left = p.right;
-                       gp.left.parent = gp;
-                     } else gp.left = null;
+               var properties = category.properties || {};
+               var exclude = properties.exclude || {};
+               (exclude.generic || []).forEach(function (s) {
+                 return branch.excludeGeneric.set(s, new RegExp(s, 'i'));
+               });
+               (exclude.named || []).forEach(function (s) {
+                 return branch.excludeNamed.set(s, new RegExp(s, 'i'));
+               });
+               var excludeRegexes = [].concat(_toConsumableArray(branch.excludeGeneric.values()), _toConsumableArray(branch.excludeNamed.values())); // ADD ITEMS
 
-                     p.right = gp;
-                     gp.parent = p;
-                   } else {
-                     /* zig-zag */
-                     if (l) {
-                       gp.right = l;
-                       l.parent = gp;
-                     } else gp.right = null;
-
-                     x.left = gp;
-                     gp.parent = x;
-                   }
-                 }
+               var items = category.items;
+               if (!Array.isArray(items) || !items.length) return; // Primary name patterns, match tags to take first
+               //  e.g. `name`, `name:ru`
 
-                 if (r) {
-                   p.left = r;
-                   r.parent = p;
-                 } else p.left = null;
+               var primaryName = new RegExp(tree.nameTags.primary, 'i'); // Alternate name patterns, match tags to consider after primary
+               //  e.g. `alt_name`, `short_name`, `brand`, `brand:ru`, etc..
 
-                 x.right = p;
-                 p.parent = x;
-               } else {
-                 // right
-                 if (gp) {
-                   if (gp.right === p) {
-                     /* zig-zig */
-                     if (p.left) {
-                       gp.right = p.left;
-                       gp.right.parent = gp;
-                     } else gp.right = null;
-
-                     p.left = gp;
-                     gp.parent = p;
-                   } else {
-                     /* zig-zag */
-                     if (r) {
-                       gp.left = r;
-                       r.parent = gp;
-                     } else gp.left = null;
-
-                     x.right = gp;
-                     gp.parent = x;
-                   }
-                 }
+               var alternateName = new RegExp(tree.nameTags.alternate, 'i'); // There are a few exceptions to the name matching regexes.
+               // Usually a tag suffix contains a language code like `name:en`, `name:ru`
+               // but we want to exclude things like `operator:type`, `name:etymology`, etc..
 
-                 if (l) {
-                   p.right = l;
-                   l.parent = p;
-                 } else p.right = null;
+               var notName = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-                 x.left = p;
-                 p.parent = x;
-               }
-             }
-           }
-         }, {
-           key: "replace",
-           value: function replace(u, v) {
-             if (!u.parent) this._root = v;else if (u === u.parent.left) u.parent.left = v;else u.parent.right = v;
-             if (v) v.parent = u.parent;
-           }
-         }, {
-           key: "minNode",
-           value: function minNode() {
-             var u = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
-             if (u) while (u.left) {
-               u = u.left;
-             }
-             return u;
-           }
-         }, {
-           key: "maxNode",
-           value: function maxNode() {
-             var u = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
-             if (u) while (u.right) {
-               u = u.right;
-             }
-             return u;
-           }
-         }, {
-           key: "insert",
-           value: function insert(key, data) {
-             var z = this._root;
-             var p = null;
-             var comp = this._compare;
-             var cmp;
-
-             if (this._noDuplicates) {
-               while (z) {
-                 p = z;
-                 cmp = comp(z.key, key);
-                 if (cmp === 0) return;else if (comp(z.key, key) < 0) z = z.right;else z = z.left;
-               }
-             } else {
-               while (z) {
-                 p = z;
-                 if (comp(z.key, key) < 0) z = z.right;else z = z.left;
-               }
-             }
+               var skipGenericKV = skipGenericKVMatches(t, k, v); // We will collect the generic KV pairs anyway (for the purpose of filtering them out of matchTags)
 
-             z = {
-               key: key,
-               data: data,
-               left: null,
-               right: null,
-               parent: p
-             };
-             if (!p) this._root = z;else if (comp(p.key, z.key) < 0) p.right = z;else p.left = z;
-             this.splay(z);
-             this._size++;
-             return z;
-           }
-         }, {
-           key: "find",
-           value: function find(key) {
-             var z = this._root;
-             var comp = this._compare;
+               var genericKV = new Set(["".concat(k, "/yes"), "building/yes"]); // Collect alternate tagpairs for this kv category from matchGroups.
+               // We might also pick up a few more generic KVs (like `shop/yes`)
 
-             while (z) {
-               var cmp = comp(z.key, key);
-               if (cmp < 0) z = z.right;else if (cmp > 0) z = z.left;else return z;
-             }
+               var matchGroupKV = new Set();
+               Object.values(matchGroups).forEach(function (matchGroup) {
+                 var inGroup = matchGroup.some(function (otherkv) {
+                   return otherkv === thiskv;
+                 });
+                 if (!inGroup) return;
+                 matchGroup.forEach(function (otherkv) {
+                   if (otherkv === thiskv) return; // skip self
 
-             return null;
-           }
-           /**
-            * Whether the tree contains a node with the given key
-            * @param  {Key} key
-            * @return {boolean} true/false
-            */
+                   matchGroupKV.add(otherkv);
+                   var otherk = otherkv.split('/', 2)[0]; // we might pick up a `shop/yes`
 
-         }, {
-           key: "contains",
-           value: function contains(key) {
-             var node = this._root;
-             var comparator = this._compare;
+                   genericKV.add("".concat(otherk, "/yes"));
+                 });
+               }); // For each item, insert all [key, value, name] combinations into the match index
 
-             while (node) {
-               var cmp = comparator(key, node.key);
-               if (cmp === 0) return true;else if (cmp < 0) node = node.left;else node = node.right;
-             }
+               items.forEach(function (item) {
+                 if (!item.id) return; // Automatically remove redundant `matchTags` - #3417
+                 // (i.e. This kv is already covered by matchGroups, so it doesn't need to be in `item.matchTags`)
 
-             return false;
-           }
-         }, {
-           key: "remove",
-           value: function remove(key) {
-             var z = this.find(key);
-             if (!z) return false;
-             this.splay(z);
-             if (!z.left) this.replace(z, z.right);else if (!z.right) this.replace(z, z.left);else {
-               var y = this.minNode(z.right);
+                 if (Array.isArray(item.matchTags) && item.matchTags.length) {
+                   item.matchTags = item.matchTags.filter(function (matchTag) {
+                     return !matchGroupKV.has(matchTag) && !genericKV.has(matchTag);
+                   });
+                   if (!item.matchTags.length) delete item.matchTags;
+                 } // key/value tagpairs to insert into the match index..
 
-               if (y.parent !== z) {
-                 this.replace(y, y.right);
-                 y.right = z.right;
-                 y.right.parent = y;
-               }
 
-               this.replace(z, y);
-               y.left = z.left;
-               y.left.parent = y;
-             }
-             this._size--;
-             return true;
-           }
-         }, {
-           key: "removeNode",
-           value: function removeNode(z) {
-             if (!z) return false;
-             this.splay(z);
-             if (!z.left) this.replace(z, z.right);else if (!z.right) this.replace(z, z.left);else {
-               var y = this.minNode(z.right);
+                 var kvTags = ["".concat(thiskv)].concat(item.matchTags || []);
 
-               if (y.parent !== z) {
-                 this.replace(y, y.right);
-                 y.right = z.right;
-                 y.right.parent = y;
-               }
+                 if (!skipGenericKV) {
+                   kvTags = kvTags.concat(Array.from(genericKV)); // #3454 - match some generic tags
+                 } // Index all the namelike tag values
 
-               this.replace(z, y);
-               y.left = z.left;
-               y.left.parent = y;
-             }
-             this._size--;
-             return true;
-           }
-         }, {
-           key: "erase",
-           value: function erase(key) {
-             var z = this.find(key);
-             if (!z) return;
-             this.splay(z);
-             var s = z.left;
-             var t = z.right;
-             var sMax = null;
 
-             if (s) {
-               s.parent = null;
-               sMax = this.maxNode(s);
-               this.splay(sMax);
-               this._root = sMax;
-             }
+                 Object.keys(item.tags).forEach(function (osmkey) {
+                   if (notName.test(osmkey)) return; // osmkey is not a namelike tag, skip
 
-             if (t) {
-               if (s) sMax.right = t;else this._root = t;
-               t.parent = sMax;
-             }
+                   var osmvalue = item.tags[osmkey];
+                   if (!osmvalue || excludeRegexes.some(function (regex) {
+                     return regex.test(osmvalue);
+                   })) return; // osmvalue missing or excluded
 
-             this._size--;
-           }
-           /**
-            * Removes and returns the node with smallest key
-            * @return {?Node}
-            */
+                   if (primaryName.test(osmkey)) {
+                     kvTags.forEach(function (kv) {
+                       return insertName('primary', t, kv, simplify$1(osmvalue), item.id);
+                     });
+                   } else if (alternateName.test(osmkey)) {
+                     kvTags.forEach(function (kv) {
+                       return insertName('alternate', t, kv, simplify$1(osmvalue), item.id);
+                     });
+                   }
+                 }); // Index `matchNames` after indexing all other names..
+
+                 var keepMatchNames = new Set();
+                 (item.matchNames || []).forEach(function (matchName) {
+                   // If this matchname isn't already indexed, add it to the alternate index
+                   var nsimple = simplify$1(matchName);
+                   kvTags.forEach(function (kv) {
+                     var branch = that.matchIndex.get(kv);
+                     var primaryLeaf = branch && branch.primary.get(nsimple);
+                     var alternateLeaf = branch && branch.alternate.get(nsimple);
+                     var inPrimary = primaryLeaf && primaryLeaf.has(item.id);
+                     var inAlternate = alternateLeaf && alternateLeaf.has(item.id);
+
+                     if (!inPrimary && !inAlternate) {
+                       insertName('alternate', t, kv, nsimple, item.id);
+                       keepMatchNames.add(matchName);
+                     }
+                   });
+                 }); // Automatically remove redundant `matchNames` - #3417
+                 // (i.e. This name got indexed some other way, so it doesn't need to be in `item.matchNames`)
 
-         }, {
-           key: "pop",
-           value: function pop() {
-             var node = this._root,
-                 returnValue = null;
+                 if (keepMatchNames.size) {
+                   item.matchNames = Array.from(keepMatchNames);
+                 } else {
+                   delete item.matchNames;
+                 }
+               }); // each item
+             }); // each tkv
+             // Insert this item into the matchIndex
 
-             if (node) {
-               while (node.left) {
-                 node = node.left;
+             function insertName(which, t, kv, nsimple, itemID) {
+               if (!nsimple) {
+                 that.warnings.push("Warning: skipping empty ".concat(which, " name for item ").concat(t, "/").concat(kv, ": ").concat(itemID));
+                 return;
                }
 
-               returnValue = {
-                 key: node.key,
-                 data: node.data
-               };
-               this.remove(node.key);
-             }
+               var branch = that.matchIndex.get(kv);
 
-             return returnValue;
-           }
-           /* eslint-disable class-methods-use-this */
+               if (!branch) {
+                 branch = {
+                   primary: new Map(),
+                   alternate: new Map(),
+                   excludeGeneric: new Map(),
+                   excludeNamed: new Map()
+                 };
+                 that.matchIndex.set(kv, branch);
+               }
 
-           /**
-            * Successor node
-            * @param  {Node} node
-            * @return {?Node}
-            */
+               var leaf = branch[which].get(nsimple);
 
-         }, {
-           key: "next",
-           value: function next(node) {
-             var successor = node;
+               if (!leaf) {
+                 leaf = new Set();
+                 branch[which].set(nsimple, leaf);
+               }
 
-             if (successor) {
-               if (successor.right) {
-                 successor = successor.right;
+               leaf.add(itemID); // insert
+               // check for duplicates - #5625
 
-                 while (successor && successor.left) {
-                   successor = successor.left;
-                 }
-               } else {
-                 successor = node.parent;
+               if (!/yes$/.test(kv)) {
+                 // ignore genericKV like amenity/yes, building/yes, etc
+                 var kvnsimple = "".concat(kv, "/").concat(nsimple);
+                 var existing = seenTree.get(kvnsimple);
 
-                 while (successor && successor.right === node) {
-                   node = successor;
-                   successor = successor.parent;
+                 if (existing && existing !== t) {
+                   var items = Array.from(leaf);
+                   that.warnings.push("Duplicate cache key \"".concat(kvnsimple, "\" in trees \"").concat(t, "\" and \"").concat(existing, "\", check items: ").concat(items));
+                   return;
                  }
+
+                 seenTree.set(kvnsimple, t);
                }
-             }
+             } // For certain categories we do not want to match generic KV pairs like `building/yes` or `amenity/yes`
 
-             return successor;
-           }
-           /**
-            * Predecessor node
-            * @param  {Node} node
-            * @return {?Node}
-            */
+
+             function skipGenericKVMatches(t, k, v) {
+               return t === 'flags' || t === 'transit' || k === 'landuse' || v === 'atm' || v === 'bicycle_parking' || v === 'car_sharing' || v === 'caravan_site' || v === 'charging_station' || v === 'dog_park' || v === 'parking' || v === 'phone' || v === 'playground' || v === 'post_box' || v === 'public_bookcase' || v === 'recycling' || v === 'vending_machine';
+             }
+           } //
+           // `buildLocationIndex()`
+           // Call this to prepare a which-polygon location index.
+           // This *resolves* all the locationSets into GeoJSON, which takes some time.
+           // You can skip this step if you don't care about matching within a location.
+           //
+           // `data` needs to be an Object indexed on a 'tree/key/value' path.
+           // (e.g. cache filled by `fileTree.read` or data found in `dist/nsi.json`)
+           // {
+           //    'brands/amenity/bank': { properties: {}, items: [ {}, {}, … ] },
+           //    'brands/amenity/bar':  { properties: {}, items: [ {}, {}, … ] },
+           //    …
+           // }
+           //
 
          }, {
-           key: "prev",
-           value: function prev(node) {
-             var predecessor = node;
+           key: "buildLocationIndex",
+           value: function buildLocationIndex(data, loco) {
+             var that = this;
+             if (that.locationIndex) return; // it was built already
 
-             if (predecessor) {
-               if (predecessor.left) {
-                 predecessor = predecessor.left;
+             that.itemLocation = new Map();
+             that.locationSets = new Map();
+             Object.keys(data).forEach(function (tkv) {
+               var items = data[tkv].items;
+               if (!Array.isArray(items) || !items.length) return;
+               items.forEach(function (item) {
+                 if (that.itemLocation.has(item.id)) return; // we've seen item id already - shouldn't be possible?
 
-                 while (predecessor && predecessor.right) {
-                   predecessor = predecessor.right;
-                 }
-               } else {
-                 predecessor = node.parent;
+                 var resolved;
 
-                 while (predecessor && predecessor.left === node) {
-                   node = predecessor;
-                   predecessor = predecessor.parent;
+                 try {
+                   resolved = loco.resolveLocationSet(item.locationSet); // resolve a feature for this locationSet
+                 } catch (err) {
+                   console.warn("buildLocationIndex: ".concat(err.message)); // couldn't resolve
                  }
-               }
-             }
-
-             return predecessor;
-           }
-           /* eslint-enable class-methods-use-this */
-
-           /**
-            * @param  {forEachCallback} callback
-            * @return {SplayTree}
-            */
 
-         }, {
-           key: "forEach",
-           value: function forEach(callback) {
-             var current = this._root;
-             var s = [],
-                 done = false,
-                 i = 0;
+                 if (!resolved || !resolved.id) return;
+                 that.itemLocation.set(item.id, resolved.id); // link it to the item
 
-             while (!done) {
-               // Reach the left most Node of the current Node
-               if (current) {
-                 // Place pointer to a tree node on the stack
-                 // before traversing the node's left subtree
-                 s.push(current);
-                 current = current.left;
-               } else {
-                 // BackTrack from the empty subtree and visit the Node
-                 // at the top of the stack; however, if the stack is
-                 // empty you are done
-                 if (s.length > 0) {
-                   current = s.pop();
-                   callback(current, i++); // We have visited the node and its left
-                   // subtree. Now, it's right subtree's turn
+                 if (that.locationSets.has(resolved.id)) return; // we've seen this locationSet feature before..
+                 // First time seeing this locationSet feature, make a copy and add to locationSet cache..
 
-                   current = current.right;
-                 } else done = true;
-               }
-             }
+                 var feature = _cloneDeep(resolved.feature);
 
-             return this;
-           }
-           /**
-            * Walk key range from `low` to `high`. Stops if `fn` returns a value.
-            * @param  {Key}      low
-            * @param  {Key}      high
-            * @param  {Function} fn
-            * @param  {*?}       ctx
-            * @return {SplayTree}
-            */
+                 feature.id = resolved.id; // Important: always use the locationSet `id` (`+[Q30]`), not the feature `id` (`Q30`)
 
-         }, {
-           key: "range",
-           value: function range(low, high, fn, ctx) {
-             var Q = [];
-             var compare = this._compare;
-             var node = this._root,
-                 cmp;
-
-             while (Q.length !== 0 || node) {
-               if (node) {
-                 Q.push(node);
-                 node = node.left;
-               } else {
-                 node = Q.pop();
-                 cmp = compare(node.key, high);
+                 feature.properties.id = resolved.id;
 
-                 if (cmp > 0) {
-                   break;
-                 } else if (compare(node.key, low) >= 0) {
-                   if (fn.call(ctx, node)) return this; // stop if smth is returned
+                 if (!feature.geometry.coordinates.length || !feature.properties.area) {
+                   console.warn("buildLocationIndex: locationSet ".concat(resolved.id, " for ").concat(item.id, " resolves to an empty feature:"));
+                   console.warn(JSON.stringify(feature));
+                   return;
                  }
 
-                 node = node.right;
-               }
-             }
-
-             return this;
-           }
-           /**
-            * Returns all keys in order
-            * @return {Array<Key>}
-            */
+                 that.locationSets.set(resolved.id, feature);
+               });
+             });
+             that.locationIndex = whichPolygon_1({
+               type: 'FeatureCollection',
+               features: _toConsumableArray(that.locationSets.values())
+             });
 
-         }, {
-           key: "keys",
-           value: function keys() {
-             var current = this._root;
-             var s = [],
-                 r = [],
-                 done = false;
-
-             while (!done) {
-               if (current) {
-                 s.push(current);
-                 current = current.left;
-               } else {
-                 if (s.length > 0) {
-                   current = s.pop();
-                   r.push(current.key);
-                   current = current.right;
-                 } else done = true;
-               }
+             function _cloneDeep(obj) {
+               return JSON.parse(JSON.stringify(obj));
              }
-
-             return r;
-           }
-           /**
-            * Returns `data` fields of all nodes in order.
-            * @return {Array<Value>}
-            */
+           } //
+           // `match()`
+           // Pass parts and return an Array of matches.
+           // `k` - key
+           // `v` - value
+           // `n` - namelike
+           // `loc` - optional - [lon,lat] location to search
+           //
+           // 1. If the [k,v,n] tuple matches a canonical item…
+           // Return an Array of match results.
+           // Each result will include the area in km² that the item is valid.
+           //
+           // Order of results:
+           // Primary ordering will be on the "match" column:
+           //   "primary" - where the query matches the `name` tag, followed by
+           //   "alternate" - where the query matches an alternate name tag (e.g. short_name, brand, operator, etc)
+           // Secondary ordering will be on the "area" column:
+           //   "area descending" if no location was provided, (worldwide before local)
+           //   "area ascending" if location was provided (local before worldwide)
+           //
+           // [
+           //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
+           //   { match: 'primary',   itemID: String,  area: Number,  kv: String,  nsimple: String },
+           //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
+           //   { match: 'alternate', itemID: String,  area: Number,  kv: String,  nsimple: String },
+           //   …
+           // ]
+           //
+           // -or-
+           //
+           // 2. If the [k,v,n] tuple matches an exclude pattern…
+           // Return an Array with a single exclude result, either
+           //
+           // [ { match: 'excludeGeneric', pattern: String,  kv: String } ]  // "generic" e.g. "Food Court"
+           //   or
+           // [ { match: 'excludeNamed', pattern: String,  kv: String } ]    // "named", e.g. "Kebabai"
+           //
+           // About results
+           //   "generic" - a generic word that is probably not really a name.
+           //     For these, iD should warn the user "Hey don't put 'food court' in the name tag".
+           //   "named" - a real name like "Kebabai" that is just common, but not a brand.
+           //     For these, iD should just let it be. We don't include these in NSI, but we don't want to nag users about it either.
+           //
+           // -or-
+           //
+           // 3. If the [k,v,n] tuple matches nothing of any kind, return `null`
+           //
+           //
 
          }, {
-           key: "values",
-           value: function values() {
-             var current = this._root;
-             var s = [],
-                 r = [],
-                 done = false;
-
-             while (!done) {
-               if (current) {
-                 s.push(current);
-                 current = current.left;
-               } else {
-                 if (s.length > 0) {
-                   current = s.pop();
-                   r.push(current.data);
-                   current = current.right;
-                 } else done = true;
-               }
-             }
+           key: "match",
+           value: function match(k, v, n, loc) {
+             var that = this;
 
-             return r;
-           }
-           /**
-            * Returns node at given index
-            * @param  {number} index
-            * @return {?Node}
-            */
+             if (!that.matchIndex) {
+               throw new Error('match:  matchIndex not built.');
+             } // If we were supplied a location, and a that.locationIndex has been set up,
+             // get the locationSets that are valid there so we can filter results.
 
-         }, {
-           key: "at",
-           value: function at(index) {
-             // removed after a consideration, more misleading than useful
-             // index = index % this.size;
-             // if (index < 0) index = this.size - index;
-             var current = this._root;
-             var s = [],
-                 done = false,
-                 i = 0;
 
-             while (!done) {
-               if (current) {
-                 s.push(current);
-                 current = current.left;
-               } else {
-                 if (s.length > 0) {
-                   current = s.pop();
-                   if (i === index) return current;
-                   i++;
-                   current = current.right;
-                 } else done = true;
-               }
+             var matchLocations;
+
+             if (Array.isArray(loc) && that.locationIndex) {
+               // which-polygon query returns an array of GeoJSON properties, pass true to return all results
+               matchLocations = that.locationIndex([loc[0], loc[1], loc[0], loc[1]], true);
              }
 
-             return null;
-           }
-           /**
-            * Bulk-load items. Both array have to be same size
-            * @param  {Array<Key>}    keys
-            * @param  {Array<Value>}  [values]
-            * @param  {Boolean}       [presort=false] Pre-sort keys and values, using
-            *                                         tree's comparator. Sorting is done
-            *                                         in-place
-            * @return {AVLTree}
-            */
+             var nsimple = simplify$1(n);
+             var seen = new Set();
+             var results = [];
+             gatherResults('primary');
+             gatherResults('alternate');
+             if (results.length) return results;
+             gatherResults('exclude');
+             return results.length ? results : null;
+
+             function gatherResults(which) {
+               // First try an exact match on k/v
+               var kv = "".concat(k, "/").concat(v);
+               var didMatch = tryMatch(which, kv);
+               if (didMatch) return; // If that didn't work, look in match groups for other pairs considered equivalent to k/v..
+
+               for (var mg in matchGroups) {
+                 var matchGroup = matchGroups[mg];
+                 var inGroup = matchGroup.some(function (otherkv) {
+                   return otherkv === kv;
+                 });
+                 if (!inGroup) continue;
 
-         }, {
-           key: "load",
-           value: function load() {
-             var keys = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : [];
-             var values = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
-             var presort = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
-             if (this._size !== 0) throw new Error('bulk-load: tree is not empty');
-             var size = keys.length;
-             if (presort) sort(keys, values, 0, size - 1, this._compare);
-             this._root = loadRecursive(null, keys, values, 0, size);
-             this._size = size;
-             return this;
-           }
-         }, {
-           key: "min",
-           value: function min() {
-             var node = this.minNode(this._root);
-             if (node) return node.key;else return null;
-           }
-         }, {
-           key: "max",
-           value: function max() {
-             var node = this.maxNode(this._root);
-             if (node) return node.key;else return null;
-           }
-         }, {
-           key: "isEmpty",
-           value: function isEmpty() {
-             return this._root === null;
-           }
-         }, {
-           key: "size",
-           get: function get() {
-             return this._size;
-           }
-           /**
-            * Create a tree and load it with items
-            * @param  {Array<Key>}          keys
-            * @param  {Array<Value>?}        [values]
-             * @param  {Function?}            [comparator]
-            * @param  {Boolean?}             [presort=false] Pre-sort keys and values, using
-            *                                               tree's comparator. Sorting is done
-            *                                               in-place
-            * @param  {Boolean?}             [noDuplicates=false]   Allow duplicates
-            * @return {SplayTree}
-            */
+                 for (var i = 0; i < matchGroup.length; i++) {
+                   var otherkv = matchGroup[i];
+                   if (otherkv === kv) continue; // skip self
 
-         }], [{
-           key: "createTree",
-           value: function createTree(keys, values, comparator, presort, noDuplicates) {
-             return new SplayTree(comparator, noDuplicates).load(keys, values, presort);
-           }
-         }]);
+                   didMatch = tryMatch(which, otherkv);
+                   if (didMatch) return;
+                 }
+               } // If finished 'exclude' pass and still haven't matched anything, try the global `genericWords.json` patterns
 
-         return SplayTree;
-       }();
 
-       function loadRecursive(parent, keys, values, start, end) {
-         var size = end - start;
+               if (which === 'exclude') {
+                 var regex = _toConsumableArray(that.genericWords.values()).find(function (regex) {
+                   return regex.test(n);
+                 });
 
-         if (size > 0) {
-           var middle = start + Math.floor(size / 2);
-           var key = keys[middle];
-           var data = values[middle];
-           var node = {
-             key: key,
-             data: data,
-             parent: parent
-           };
-           node.left = loadRecursive(node, keys, values, start, middle);
-           node.right = loadRecursive(node, keys, values, middle + 1, end);
-           return node;
-         }
+                 if (regex) {
+                   results.push({
+                     match: 'excludeGeneric',
+                     pattern: String(regex)
+                   }); // note no `branch`, no `kv`
 
-         return null;
-       }
+                   return;
+                 }
+               }
+             }
 
-       function sort(keys, values, left, right, compare) {
-         if (left >= right) return;
-         var pivot = keys[left + right >> 1];
-         var i = left - 1;
-         var j = right + 1;
+             function tryMatch(which, kv) {
+               var branch = that.matchIndex.get(kv);
+               if (!branch) return;
 
-         while (true) {
-           do {
-             i++;
-           } while (compare(keys[i], pivot) < 0);
+               if (which === 'exclude') {
+                 // Test name `n` against named and generic exclude patterns
+                 var regex = _toConsumableArray(branch.excludeNamed.values()).find(function (regex) {
+                   return regex.test(n);
+                 });
 
-           do {
-             j--;
-           } while (compare(keys[j], pivot) > 0);
+                 if (regex) {
+                   results.push({
+                     match: 'excludeNamed',
+                     pattern: String(regex),
+                     kv: kv
+                   });
+                   return;
+                 }
 
-           if (i >= j) break;
-           var tmp = keys[i];
-           keys[i] = keys[j];
-           keys[j] = tmp;
-           tmp = values[i];
-           values[i] = values[j];
-           values[j] = tmp;
-         }
+                 regex = _toConsumableArray(branch.excludeGeneric.values()).find(function (regex) {
+                   return regex.test(n);
+                 });
 
-         sort(keys, values, left, j, compare);
-         sort(keys, values, j + 1, right, compare);
-       }
+                 if (regex) {
+                   results.push({
+                     match: 'excludeGeneric',
+                     pattern: String(regex),
+                     kv: kv
+                   });
+                   return;
+                 }
 
-       var NORMAL = 0;
-       var NON_CONTRIBUTING = 1;
-       var SAME_TRANSITION = 2;
-       var DIFFERENT_TRANSITION = 3;
+                 return;
+               }
 
-       var INTERSECTION = 0;
-       var UNION = 1;
-       var DIFFERENCE = 2;
-       var XOR = 3;
+               var leaf = branch[which].get(nsimple);
+               if (!leaf || !leaf.size) return; // If we get here, we matched something..
+               // Prepare the results, calculate areas (if location index was set up)
 
-       /**
-        * @param  {SweepEvent} event
-        * @param  {SweepEvent} prev
-        * @param  {Operation} operation
-        */
+               var hits = Array.from(leaf).map(function (itemID) {
+                 var area = Infinity;
 
-       function computeFields(event, prev, operation) {
-         // compute inOut and otherInOut fields
-         if (prev === null) {
-           event.inOut = false;
-           event.otherInOut = true; // previous line segment in sweepline belongs to the same polygon
-         } else {
-           if (event.isSubject === prev.isSubject) {
-             event.inOut = !prev.inOut;
-             event.otherInOut = prev.otherInOut; // previous line segment in sweepline belongs to the clipping polygon
-           } else {
-             event.inOut = !prev.otherInOut;
-             event.otherInOut = prev.isVertical() ? !prev.inOut : prev.inOut;
-           } // compute prevInResult field
+                 if (that.itemLocation && that.locationSets) {
+                   var location = that.locationSets.get(that.itemLocation.get(itemID));
+                   area = location && location.properties.area || Infinity;
+                 }
 
+                 return {
+                   match: which,
+                   itemID: itemID,
+                   area: area,
+                   kv: kv,
+                   nsimple: nsimple
+                 };
+               });
+               var sortFn = byAreaDescending; // Filter the match to include only results valid in the requested `loc`..
 
-           if (prev) {
-             event.prevInResult = !inResult(prev, operation) || prev.isVertical() ? prev.prevInResult : prev;
-           }
-         } // check if the line segment belongs to the Boolean operation
+               if (matchLocations) {
+                 hits = hits.filter(isValidLocation);
+                 sortFn = byAreaAscending;
+               }
 
+               if (!hits.length) return; // push results
 
-         var isInResult = inResult(event, operation);
+               hits.sort(sortFn).forEach(function (hit) {
+                 if (seen.has(hit.itemID)) return;
+                 seen.add(hit.itemID);
+                 results.push(hit);
+               });
+               return true;
 
-         if (isInResult) {
-           event.resultTransition = determineResultTransition(event, operation);
-         } else {
-           event.resultTransition = 0;
-         }
-       }
-       /* eslint-disable indent */
+               function isValidLocation(hit) {
+                 if (!that.itemLocation) return true;
+                 return matchLocations.find(function (props) {
+                   return props.id === that.itemLocation.get(hit.itemID);
+                 });
+               } // Sort smaller (more local) locations first.
 
-       function inResult(event, operation) {
-         switch (event.type) {
-           case NORMAL:
-             switch (operation) {
-               case INTERSECTION:
-                 return !event.otherInOut;
 
-               case UNION:
-                 return event.otherInOut;
+               function byAreaAscending(hitA, hitB) {
+                 return hitA.area - hitB.area;
+               } // Sort larger (more worldwide) locations first.
 
-               case DIFFERENCE:
-                 // return (event.isSubject && !event.otherInOut) ||
-                 //         (!event.isSubject && event.otherInOut);
-                 return event.isSubject && event.otherInOut || !event.isSubject && !event.otherInOut;
 
-               case XOR:
-                 return true;
+               function byAreaDescending(hitA, hitB) {
+                 return hitB.area - hitA.area;
+               }
              }
+           } //
+           // `getWarnings()`
+           // Return any warnings discovered when buiding the index.
+           // (currently this does nothing)
+           //
 
-             break;
+         }, {
+           key: "getWarnings",
+           value: function getWarnings() {
+             return this.warnings;
+           }
+         }]);
 
-           case SAME_TRANSITION:
-             return operation === INTERSECTION || operation === UNION;
+         return Matcher;
+       }();
 
-           case DIFFERENT_TRANSITION:
-             return operation === DIFFERENCE;
+       /*
+           iD.coreDifference represents the difference between two graphs.
+           It knows how to calculate the set of entities that were
+           created, modified, or deleted, and also contains the logic
+           for recursively extending a difference to the complete set
+           of entities that will require a redraw, taking into account
+           child and parent relationships.
+        */
 
-           case NON_CONTRIBUTING:
-             return false;
-         }
+       function coreDifference(base, head) {
+         var _changes = {};
+         var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
 
-         return false;
-       }
-       /* eslint-enable indent */
+         var _diff = {};
 
+         function checkEntityID(id) {
+           var h = head.entities[id];
+           var b = base.entities[id];
+           if (h === b) return;
+           if (_changes[id]) return;
 
-       function determineResultTransition(event, operation) {
-         var thisIn = !event.inOut;
-         var thatIn = !event.otherInOut;
-         var isIn;
+           if (!h && b) {
+             _changes[id] = {
+               base: b,
+               head: h
+             };
+             _didChange.deletion = true;
+             return;
+           }
 
-         switch (operation) {
-           case INTERSECTION:
-             isIn = thisIn && thatIn;
-             break;
+           if (h && !b) {
+             _changes[id] = {
+               base: b,
+               head: h
+             };
+             _didChange.addition = true;
+             return;
+           }
 
-           case UNION:
-             isIn = thisIn || thatIn;
-             break;
+           if (h && b) {
+             if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
+               _didChange.properties = true;
+               return;
+             }
 
-           case XOR:
-             isIn = thisIn ^ thatIn;
-             break;
+             if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
+             }
 
-           case DIFFERENCE:
-             if (event.isSubject) {
-               isIn = thisIn && !thatIn;
-             } else {
-               isIn = thatIn && !thisIn;
+             if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.geometry = true;
              }
 
-             break;
+             if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
+               _changes[id] = {
+                 base: b,
+                 head: h
+               };
+               _didChange.properties = true;
+             }
+           }
          }
 
-         return isIn ? +1 : -1;
-       }
+         function load() {
+           // HOT CODE: there can be many thousands of downloaded entities, so looping
+           // through them all can become a performance bottleneck. Optimize by
+           // resolving duplicates and using a basic `for` loop
+           var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));
 
-       var SweepEvent = /*#__PURE__*/function () {
-         /**
-          * Sweepline event
-          *
-          * @class {SweepEvent}
-          * @param {Array.<Number>}  point
-          * @param {Boolean}         left
-          * @param {SweepEvent=}     otherEvent
-          * @param {Boolean}         isSubject
-          * @param {Number}          edgeType
-          */
-         function SweepEvent(point, left, otherEvent, isSubject, edgeType) {
-           _classCallCheck(this, SweepEvent);
+           for (var i = 0; i < ids.length; i++) {
+             checkEntityID(ids[i]);
+           }
+         }
 
-           /**
-            * Is left endpoint?
-            * @type {Boolean}
-            */
-           this.left = left;
-           /**
-            * @type {Array.<Number>}
-            */
+         load();
 
-           this.point = point;
-           /**
-            * Other edge reference
-            * @type {SweepEvent}
-            */
+         _diff.length = function length() {
+           return Object.keys(_changes).length;
+         };
 
-           this.otherEvent = otherEvent;
-           /**
-            * Belongs to source or clipping polygon
-            * @type {Boolean}
-            */
+         _diff.changes = function changes() {
+           return _changes;
+         };
 
-           this.isSubject = isSubject;
-           /**
-            * Edge contribution type
-            * @type {Number}
-            */
+         _diff.didChange = _didChange; // pass true to include affected relation members
 
-           this.type = edgeType || NORMAL;
-           /**
-            * In-out transition for the sweepline crossing polygon
-            * @type {Boolean}
-            */
+         _diff.extantIDs = function extantIDs(includeRelMembers) {
+           var result = new Set();
+           Object.keys(_changes).forEach(function (id) {
+             if (_changes[id].head) {
+               result.add(id);
+             }
 
-           this.inOut = false;
-           /**
-            * @type {Boolean}
-            */
+             var h = _changes[id].head;
+             var b = _changes[id].base;
+             var entity = h || b;
 
-           this.otherInOut = false;
-           /**
-            * Previous event in result?
-            * @type {SweepEvent}
-            */
+             if (includeRelMembers && entity.type === 'relation') {
+               var mh = h ? h.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               var mb = b ? b.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               utilArrayUnion(mh, mb).forEach(function (memberID) {
+                 if (head.hasEntity(memberID)) {
+                   result.add(memberID);
+                 }
+               });
+             }
+           });
+           return Array.from(result);
+         };
 
-           this.prevInResult = null;
-           /**
-            * Type of result transition (0 = not in result, +1 = out-in, -1, in-out)
-            * @type {Number}
-            */
+         _diff.modified = function modified() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (change.base && change.head) {
+               result.push(change.head);
+             }
+           });
+           return result;
+         };
 
-           this.resultTransition = 0; // connection step
+         _diff.created = function created() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (!change.base && change.head) {
+               result.push(change.head);
+             }
+           });
+           return result;
+         };
 
-           /**
-            * @type {Number}
-            */
+         _diff.deleted = function deleted() {
+           var result = [];
+           Object.values(_changes).forEach(function (change) {
+             if (change.base && !change.head) {
+               result.push(change.base);
+             }
+           });
+           return result;
+         };
 
-           this.otherPos = -1;
-           /**
-            * @type {Number}
-            */
+         _diff.summary = function summary() {
+           var relevant = {};
+           var keys = Object.keys(_changes);
 
-           this.outputContourId = -1;
-           this.isExteriorRing = true; // TODO: Looks unused, remove?
-         }
-         /**
-          * @param  {Array.<Number>}  p
-          * @return {Boolean}
-          */
+           for (var i = 0; i < keys.length; i++) {
+             var change = _changes[keys[i]];
 
+             if (change.head && change.head.geometry(head) !== 'vertex') {
+               addEntity(change.head, head, change.base ? 'modified' : 'created');
+             } else if (change.base && change.base.geometry(base) !== 'vertex') {
+               addEntity(change.base, base, 'deleted');
+             } else if (change.base && change.head) {
+               // modified vertex
+               var moved = !fastDeepEqual(change.base.loc, change.head.loc);
+               var retagged = !fastDeepEqual(change.base.tags, change.head.tags);
 
-         _createClass(SweepEvent, [{
-           key: "isBelow",
-           value: function isBelow(p) {
-             var p0 = this.point,
-                 p1 = this.otherEvent.point;
-             return this.left ? (p0[0] - p[0]) * (p1[1] - p[1]) - (p1[0] - p[0]) * (p0[1] - p[1]) > 0 // signedArea(this.point, this.otherEvent.point, p) > 0 :
-             : (p1[0] - p[0]) * (p0[1] - p[1]) - (p0[0] - p[0]) * (p1[1] - p[1]) > 0; //signedArea(this.otherEvent.point, this.point, p) > 0;
-           }
-           /**
-            * @param  {Array.<Number>}  p
-            * @return {Boolean}
-            */
+               if (moved) {
+                 addParents(change.head);
+               }
 
-         }, {
-           key: "isAbove",
-           value: function isAbove(p) {
-             return !this.isBelow(p);
+               if (retagged || moved && change.head.hasInterestingTags()) {
+                 addEntity(change.head, head, 'modified');
+               }
+             } else if (change.head && change.head.hasInterestingTags()) {
+               // created vertex
+               addEntity(change.head, head, 'created');
+             } else if (change.base && change.base.hasInterestingTags()) {
+               // deleted vertex
+               addEntity(change.base, base, 'deleted');
+             }
            }
-           /**
-            * @return {Boolean}
-            */
 
-         }, {
-           key: "isVertical",
-           value: function isVertical() {
-             return this.point[0] === this.otherEvent.point[0];
-           }
-           /**
-            * Does event belong to result?
-            * @return {Boolean}
-            */
+           return Object.values(relevant);
 
-         }, {
-           key: "clone",
-           value: function clone() {
-             var copy = new SweepEvent(this.point, this.left, this.otherEvent, this.isSubject, this.type);
-             copy.contourId = this.contourId;
-             copy.resultTransition = this.resultTransition;
-             copy.prevInResult = this.prevInResult;
-             copy.isExteriorRing = this.isExteriorRing;
-             copy.inOut = this.inOut;
-             copy.otherInOut = this.otherInOut;
-             return copy;
-           }
-         }, {
-           key: "inResult",
-           get: function get() {
-             return this.resultTransition !== 0;
+           function addEntity(entity, graph, changeType) {
+             relevant[entity.id] = {
+               entity: entity,
+               graph: graph,
+               changeType: changeType
+             };
            }
-         }]);
 
-         return SweepEvent;
-       }();
+           function addParents(entity) {
+             var parents = head.parentWays(entity);
 
-       function equals(p1, p2) {
-         if (p1[0] === p2[0]) {
-           if (p1[1] === p2[1]) {
-             return true;
-           } else {
-             return false;
+             for (var j = parents.length - 1; j >= 0; j--) {
+               var parent = parents[j];
+
+               if (!(parent.id in relevant)) {
+                 addEntity(parent, head, 'modified');
+               }
+             }
            }
-         }
+         }; // returns complete set of entities that require a redraw
+         //  (optionally within given `extent`)
 
-         return false;
-       } // const EPSILON = 1e-9;
-       // const abs = Math.abs;
-       // TODO https://github.com/w8r/martinez/issues/6#issuecomment-262847164
-       // Precision problem.
-       //
-       // module.exports = function equals(p1, p2) {
-       //   return abs(p1[0] - p2[0]) <= EPSILON && abs(p1[1] - p2[1]) <= EPSILON;
-       // };
 
-       var epsilon$1 = 1.1102230246251565e-16;
-       var splitter = 134217729;
-       var resulterrbound = (3 + 8 * epsilon$1) * epsilon$1; // fast_expansion_sum_zeroelim routine from oritinal code
+         _diff.complete = function complete(extent) {
+           var result = {};
+           var id, change;
 
-       function sum(elen, e, flen, f, h) {
-         var Q, Qnew, hh, bvirt;
-         var enow = e[0];
-         var fnow = f[0];
-         var eindex = 0;
-         var findex = 0;
+           for (id in _changes) {
+             change = _changes[id];
+             var h = change.head;
+             var b = change.base;
+             var entity = h || b;
+             var i;
 
-         if (fnow > enow === fnow > -enow) {
-           Q = enow;
-           enow = e[++eindex];
-         } else {
-           Q = fnow;
-           fnow = f[++findex];
-         }
+             if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) {
+               continue;
+             }
 
-         var hindex = 0;
+             result[id] = h;
 
-         if (eindex < elen && findex < flen) {
-           if (fnow > enow === fnow > -enow) {
-             Qnew = enow + Q;
-             hh = Q - (Qnew - enow);
-             enow = e[++eindex];
-           } else {
-             Qnew = fnow + Q;
-             hh = Q - (Qnew - fnow);
-             fnow = f[++findex];
-           }
+             if (entity.type === 'way') {
+               var nh = h ? h.nodes : [];
+               var nb = b ? b.nodes : [];
+               var diff;
+               diff = utilArrayDifference(nh, nb);
 
-           Q = Qnew;
+               for (i = 0; i < diff.length; i++) {
+                 result[diff[i]] = head.hasEntity(diff[i]);
+               }
 
-           if (hh !== 0) {
-             h[hindex++] = hh;
-           }
+               diff = utilArrayDifference(nb, nh);
 
-           while (eindex < elen && findex < flen) {
-             if (fnow > enow === fnow > -enow) {
-               Qnew = Q + enow;
-               bvirt = Qnew - Q;
-               hh = Q - (Qnew - bvirt) + (enow - bvirt);
-               enow = e[++eindex];
-             } else {
-               Qnew = Q + fnow;
-               bvirt = Qnew - Q;
-               hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-               fnow = f[++findex];
+               for (i = 0; i < diff.length; i++) {
+                 result[diff[i]] = head.hasEntity(diff[i]);
+               }
              }
 
-             Q = Qnew;
+             if (entity.type === 'relation' && entity.isMultipolygon()) {
+               var mh = h ? h.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               var mb = b ? b.members.map(function (m) {
+                 return m.id;
+               }) : [];
+               var ids = utilArrayUnion(mh, mb);
+
+               for (i = 0; i < ids.length; i++) {
+                 var member = head.hasEntity(ids[i]);
+                 if (!member) continue; // not downloaded
+
+                 if (extent && !member.intersects(extent, head)) continue; // not visible
 
-             if (hh !== 0) {
-               h[hindex++] = hh;
+                 result[ids[i]] = member;
+               }
              }
+
+             addParents(head.parentWays(entity), result);
+             addParents(head.parentRelations(entity), result);
            }
-         }
 
-         while (eindex < elen) {
-           Qnew = Q + enow;
-           bvirt = Qnew - Q;
-           hh = Q - (Qnew - bvirt) + (enow - bvirt);
-           enow = e[++eindex];
-           Q = Qnew;
+           return result;
 
-           if (hh !== 0) {
-             h[hindex++] = hh;
+           function addParents(parents, result) {
+             for (var i = 0; i < parents.length; i++) {
+               var parent = parents[i];
+               if (parent.id in result) continue;
+               result[parent.id] = parent;
+               addParents(head.parentRelations(parent), result);
+             }
            }
-         }
-
-         while (findex < flen) {
-           Qnew = Q + fnow;
-           bvirt = Qnew - Q;
-           hh = Q - (Qnew - bvirt) + (fnow - bvirt);
-           fnow = f[++findex];
-           Q = Qnew;
+         };
 
-           if (hh !== 0) {
-             h[hindex++] = hh;
-           }
-         }
-
-         if (Q !== 0 || hindex === 0) {
-           h[hindex++] = Q;
-         }
-
-         return hindex;
-       }
-       function estimate(elen, e) {
-         var Q = e[0];
-
-         for (var i = 1; i < elen; i++) {
-           Q += e[i];
-         }
-
-         return Q;
-       }
-       function vec(n) {
-         return new Float64Array(n);
-       }
-
-       var ccwerrboundA = (3 + 16 * epsilon$1) * epsilon$1;
-       var ccwerrboundB = (2 + 12 * epsilon$1) * epsilon$1;
-       var ccwerrboundC = (9 + 64 * epsilon$1) * epsilon$1 * epsilon$1;
-       var B = vec(4);
-       var C1 = vec(8);
-       var C2 = vec(12);
-       var D = vec(16);
-       var u = vec(4);
-
-       function orient2dadapt(ax, ay, bx, by, cx, cy, detsum) {
-         var acxtail, acytail, bcxtail, bcytail;
-
-         var bvirt, c, ahi, alo, bhi, blo, _i, _j, _0, s1, s0, t1, t0, u3;
-
-         var acx = ax - cx;
-         var bcx = bx - cx;
-         var acy = ay - cy;
-         var bcy = by - cy;
-         s1 = acx * bcy;
-         c = splitter * acx;
-         ahi = c - (c - acx);
-         alo = acx - ahi;
-         c = splitter * bcy;
-         bhi = c - (c - bcy);
-         blo = bcy - bhi;
-         s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-         t1 = acy * bcx;
-         c = splitter * acy;
-         ahi = c - (c - acy);
-         alo = acy - ahi;
-         c = splitter * bcx;
-         bhi = c - (c - bcx);
-         blo = bcx - bhi;
-         t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-         _i = s0 - t0;
-         bvirt = s0 - _i;
-         B[0] = s0 - (_i + bvirt) + (bvirt - t0);
-         _j = s1 + _i;
-         bvirt = _j - s1;
-         _0 = s1 - (_j - bvirt) + (_i - bvirt);
-         _i = _0 - t1;
-         bvirt = _0 - _i;
-         B[1] = _0 - (_i + bvirt) + (bvirt - t1);
-         u3 = _j + _i;
-         bvirt = u3 - _j;
-         B[2] = _j - (u3 - bvirt) + (_i - bvirt);
-         B[3] = u3;
-         var det = estimate(4, B);
-         var errbound = ccwerrboundB * detsum;
-
-         if (det >= errbound || -det >= errbound) {
-           return det;
-         }
-
-         bvirt = ax - acx;
-         acxtail = ax - (acx + bvirt) + (bvirt - cx);
-         bvirt = bx - bcx;
-         bcxtail = bx - (bcx + bvirt) + (bvirt - cx);
-         bvirt = ay - acy;
-         acytail = ay - (acy + bvirt) + (bvirt - cy);
-         bvirt = by - bcy;
-         bcytail = by - (bcy + bvirt) + (bvirt - cy);
-
-         if (acxtail === 0 && acytail === 0 && bcxtail === 0 && bcytail === 0) {
-           return det;
-         }
-
-         errbound = ccwerrboundC * detsum + resulterrbound * Math.abs(det);
-         det += acx * bcytail + bcy * acxtail - (acy * bcxtail + bcx * acytail);
-         if (det >= errbound || -det >= errbound) return det;
-         s1 = acxtail * bcy;
-         c = splitter * acxtail;
-         ahi = c - (c - acxtail);
-         alo = acxtail - ahi;
-         c = splitter * bcy;
-         bhi = c - (c - bcy);
-         blo = bcy - bhi;
-         s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-         t1 = acytail * bcx;
-         c = splitter * acytail;
-         ahi = c - (c - acytail);
-         alo = acytail - ahi;
-         c = splitter * bcx;
-         bhi = c - (c - bcx);
-         blo = bcx - bhi;
-         t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-         _i = s0 - t0;
-         bvirt = s0 - _i;
-         u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-         _j = s1 + _i;
-         bvirt = _j - s1;
-         _0 = s1 - (_j - bvirt) + (_i - bvirt);
-         _i = _0 - t1;
-         bvirt = _0 - _i;
-         u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-         u3 = _j + _i;
-         bvirt = u3 - _j;
-         u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-         u[3] = u3;
-         var C1len = sum(4, B, 4, u, C1);
-         s1 = acx * bcytail;
-         c = splitter * acx;
-         ahi = c - (c - acx);
-         alo = acx - ahi;
-         c = splitter * bcytail;
-         bhi = c - (c - bcytail);
-         blo = bcytail - bhi;
-         s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-         t1 = acy * bcxtail;
-         c = splitter * acy;
-         ahi = c - (c - acy);
-         alo = acy - ahi;
-         c = splitter * bcxtail;
-         bhi = c - (c - bcxtail);
-         blo = bcxtail - bhi;
-         t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-         _i = s0 - t0;
-         bvirt = s0 - _i;
-         u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-         _j = s1 + _i;
-         bvirt = _j - s1;
-         _0 = s1 - (_j - bvirt) + (_i - bvirt);
-         _i = _0 - t1;
-         bvirt = _0 - _i;
-         u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-         u3 = _j + _i;
-         bvirt = u3 - _j;
-         u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-         u[3] = u3;
-         var C2len = sum(C1len, C1, 4, u, C2);
-         s1 = acxtail * bcytail;
-         c = splitter * acxtail;
-         ahi = c - (c - acxtail);
-         alo = acxtail - ahi;
-         c = splitter * bcytail;
-         bhi = c - (c - bcytail);
-         blo = bcytail - bhi;
-         s0 = alo * blo - (s1 - ahi * bhi - alo * bhi - ahi * blo);
-         t1 = acytail * bcxtail;
-         c = splitter * acytail;
-         ahi = c - (c - acytail);
-         alo = acytail - ahi;
-         c = splitter * bcxtail;
-         bhi = c - (c - bcxtail);
-         blo = bcxtail - bhi;
-         t0 = alo * blo - (t1 - ahi * bhi - alo * bhi - ahi * blo);
-         _i = s0 - t0;
-         bvirt = s0 - _i;
-         u[0] = s0 - (_i + bvirt) + (bvirt - t0);
-         _j = s1 + _i;
-         bvirt = _j - s1;
-         _0 = s1 - (_j - bvirt) + (_i - bvirt);
-         _i = _0 - t1;
-         bvirt = _0 - _i;
-         u[1] = _0 - (_i + bvirt) + (bvirt - t1);
-         u3 = _j + _i;
-         bvirt = u3 - _j;
-         u[2] = _j - (u3 - bvirt) + (_i - bvirt);
-         u[3] = u3;
-         var Dlen = sum(C2len, C2, 4, u, D);
-         return D[Dlen - 1];
-       }
-
-       function orient2d(ax, ay, bx, by, cx, cy) {
-         var detleft = (ay - cy) * (bx - cx);
-         var detright = (ax - cx) * (by - cy);
-         var det = detleft - detright;
-         if (detleft === 0 || detright === 0 || detleft > 0 !== detright > 0) return det;
-         var detsum = Math.abs(detleft + detright);
-         if (Math.abs(det) >= ccwerrboundA * detsum) return det;
-         return -orient2dadapt(ax, ay, bx, by, cx, cy, detsum);
+         return _diff;
        }
 
-       /**
-        * Signed area of the triangle (p0, p1, p2)
-        * @param  {Array.<Number>} p0
-        * @param  {Array.<Number>} p1
-        * @param  {Array.<Number>} p2
-        * @return {Number}
-        */
-
-       function signedArea(p0, p1, p2) {
-         var res = orient2d(p0[0], p0[1], p1[0], p1[1], p2[0], p2[1]);
-         if (res > 0) return -1;
-         if (res < 0) return 1;
-         return 0;
-       }
+       function coreTree(head) {
+         // tree for entities
+         var _rtree = new RBush();
 
-       /**
-        * @param  {SweepEvent} e1
-        * @param  {SweepEvent} e2
-        * @return {Number}
-        */
+         var _bboxes = {}; // maintain a separate tree for granular way segments
 
-       function compareEvents(e1, e2) {
-         var p1 = e1.point;
-         var p2 = e2.point; // Different x-coordinate
+         var _segmentsRTree = new RBush();
 
-         if (p1[0] > p2[0]) return 1;
-         if (p1[0] < p2[0]) return -1; // Different points, but same x-coordinate
-         // Event with lower y-coordinate is processed first
+         var _segmentsBBoxes = {};
+         var _segmentsByWayId = {};
+         var tree = {};
 
-         if (p1[1] !== p2[1]) return p1[1] > p2[1] ? 1 : -1;
-         return specialCases(e1, e2, p1);
-       }
-       /* eslint-disable no-unused-vars */
+         function entityBBox(entity) {
+           var bbox = entity.extent(head).bbox();
+           bbox.id = entity.id;
+           _bboxes[entity.id] = bbox;
+           return bbox;
+         }
 
-       function specialCases(e1, e2, p1, p2) {
-         // Same coordinates, but one is a left endpoint and the other is
-         // a right endpoint. The right endpoint is processed first
-         if (e1.left !== e2.left) return e1.left ? 1 : -1; // const p2 = e1.otherEvent.point, p3 = e2.otherEvent.point;
-         // const sa = (p1[0] - p3[0]) * (p2[1] - p3[1]) - (p2[0] - p3[0]) * (p1[1] - p3[1])
-         // Same coordinates, both events
-         // are left endpoints or right endpoints.
-         // not collinear
+         function segmentBBox(segment) {
+           var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason
 
-         if (signedArea(p1, e1.otherEvent.point, e2.otherEvent.point) !== 0) {
-           // the event associate to the bottom segment is processed first
-           return !e1.isBelow(e2.otherEvent.point) ? 1 : -1;
+           if (!extent) return null;
+           var bbox = extent.bbox();
+           bbox.segment = segment;
+           _segmentsBBoxes[segment.id] = bbox;
+           return bbox;
          }
 
-         return !e1.isSubject && e2.isSubject ? 1 : -1;
-       }
-       /* eslint-enable no-unused-vars */
-
-       /**
-        * @param  {SweepEvent} se
-        * @param  {Array.<Number>} p
-        * @param  {Queue} queue
-        * @return {Queue}
-        */
+         function removeEntity(entity) {
+           _rtree.remove(_bboxes[entity.id]);
 
-       function divideSegment(se, p, queue) {
-         var r = new SweepEvent(p, false, se, se.isSubject);
-         var l = new SweepEvent(p, true, se.otherEvent, se.isSubject);
-         /* eslint-disable no-console */
+           delete _bboxes[entity.id];
 
-         if (equals(se.point, se.otherEvent.point)) {
-           console.warn('what is that, a collapsed segment?', se);
-         }
-         /* eslint-enable no-console */
+           if (_segmentsByWayId[entity.id]) {
+             _segmentsByWayId[entity.id].forEach(function (segment) {
+               _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
 
+               delete _segmentsBBoxes[segment.id];
+             });
 
-         r.contourId = l.contourId = se.contourId; // avoid a rounding error. The left event would be processed after the right event
+             delete _segmentsByWayId[entity.id];
+           }
+         }
 
-         if (compareEvents(l, se.otherEvent) > 0) {
-           se.otherEvent.left = true;
-           l.left = false;
-         } // avoid a rounding error. The left event would be processed after the right event
-         // if (compareEvents(se, r) > 0) {}
+         function loadEntities(entities) {
+           _rtree.load(entities.map(entityBBox));
 
+           var segments = [];
+           entities.forEach(function (entity) {
+             if (entity.segments) {
+               var entitySegments = entity.segments(head); // cache these to make them easy to remove later
 
-         se.otherEvent.otherEvent = l;
-         se.otherEvent = r;
-         queue.push(l);
-         queue.push(r);
-         return queue;
-       }
+               _segmentsByWayId[entity.id] = entitySegments;
+               segments = segments.concat(entitySegments);
+             }
+           });
+           if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+         }
 
-       //const EPS = 1e-9;
+         function updateParents(entity, insertions, memo) {
+           head.parentWays(entity).forEach(function (way) {
+             if (_bboxes[way.id]) {
+               removeEntity(way);
+               insertions[way.id] = way;
+             }
 
-       /**
-        * Finds the magnitude of the cross product of two vectors (if we pretend
-        * they're in three dimensions)
-        *
-        * @param {Object} a First vector
-        * @param {Object} b Second vector
-        * @private
-        * @returns {Number} The magnitude of the cross product
-        */
-       function crossProduct(a, b) {
-         return a[0] * b[1] - a[1] * b[0];
-       }
-       /**
-        * Finds the dot product of two vectors.
-        *
-        * @param {Object} a First vector
-        * @param {Object} b Second vector
-        * @private
-        * @returns {Number} The dot product
-        */
+             updateParents(way, insertions, memo);
+           });
+           head.parentRelations(entity).forEach(function (relation) {
+             if (memo[entity.id]) return;
+             memo[entity.id] = true;
 
+             if (_bboxes[relation.id]) {
+               removeEntity(relation);
+               insertions[relation.id] = relation;
+             }
 
-       function dotProduct(a, b) {
-         return a[0] * b[0] + a[1] * b[1];
-       }
-       /**
-        * Finds the intersection (if any) between two line segments a and b, given the
-        * line segments' end points a1, a2 and b1, b2.
-        *
-        * This algorithm is based on Schneider and Eberly.
-        * http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf
-        * Page 244.
-        *
-        * @param {Array.<Number>} a1 point of first line
-        * @param {Array.<Number>} a2 point of first line
-        * @param {Array.<Number>} b1 point of second line
-        * @param {Array.<Number>} b2 point of second line
-        * @param {Boolean=}       noEndpointTouch whether to skip single touchpoints
-        *                                         (meaning connected segments) as
-        *                                         intersections
-        * @returns {Array.<Array.<Number>>|Null} If the lines intersect, the point of
-        * intersection. If they overlap, the two end points of the overlapping segment.
-        * Otherwise, null.
-        */
+             updateParents(relation, insertions, memo);
+           });
+         }
 
+         tree.rebase = function (entities, force) {
+           var insertions = {};
 
-       function intersection (a1, a2, b1, b2, noEndpointTouch) {
-         // The algorithm expects our lines in the form P + sd, where P is a point,
-         // s is on the interval [0, 1], and d is a vector.
-         // We are passed two points. P can be the first point of each pair. The
-         // vector, then, could be thought of as the distance (in x and y components)
-         // from the first point to the second point.
-         // So first, let's make our vectors:
-         var va = [a2[0] - a1[0], a2[1] - a1[1]];
-         var vb = [b2[0] - b1[0], b2[1] - b1[1]]; // We also define a function to convert back to regular point form:
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (!entity.visible) continue;
 
-         /* eslint-disable arrow-body-style */
+             if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
+               if (!force) {
+                 continue;
+               } else if (_bboxes[entity.id]) {
+                 removeEntity(entity);
+               }
+             }
 
-         function toPoint(p, s, d) {
-           return [p[0] + s * d[0], p[1] + s * d[1]];
-         }
-         /* eslint-enable arrow-body-style */
-         // The rest is pretty much a straight port of the algorithm.
+             insertions[entity.id] = entity;
+             updateParents(entity, insertions, {});
+           }
 
+           loadEntities(Object.values(insertions));
+           return tree;
+         };
 
-         var e = [b1[0] - a1[0], b1[1] - a1[1]];
-         var kross = crossProduct(va, vb);
-         var sqrKross = kross * kross;
-         var sqrLenA = dotProduct(va, va); //const sqrLenB  = dotProduct(vb, vb);
-         // Check for line intersection. This works because of the properties of the
-         // cross product -- specifically, two vectors are parallel if and only if the
-         // cross product is the 0 vector. The full calculation involves relative error
-         // to account for possible very small line segments. See Schneider & Eberly
-         // for details.
+         function updateToGraph(graph) {
+           if (graph === head) return;
+           var diff = coreDifference(head, graph);
+           head = graph;
+           var changed = diff.didChange;
+           if (!changed.addition && !changed.deletion && !changed.geometry) return;
+           var insertions = {};
 
-         if (sqrKross > 0
-         /* EPS * sqrLenB * sqLenA */
-         ) {
-             // If they're not parallel, then (because these are line segments) they
-             // still might not actually intersect. This code checks that the
-             // intersection point of the lines is actually on both line segments.
-             var s = crossProduct(e, vb) / kross;
+           if (changed.deletion) {
+             diff.deleted().forEach(function (entity) {
+               removeEntity(entity);
+             });
+           }
 
-             if (s < 0 || s > 1) {
-               // not on line segment a
-               return null;
-             }
+           if (changed.geometry) {
+             diff.modified().forEach(function (entity) {
+               removeEntity(entity);
+               insertions[entity.id] = entity;
+               updateParents(entity, insertions, {});
+             });
+           }
 
-             var t = crossProduct(e, va) / kross;
+           if (changed.addition) {
+             diff.created().forEach(function (entity) {
+               insertions[entity.id] = entity;
+             });
+           }
 
-             if (t < 0 || t > 1) {
-               // not on line segment b
-               return null;
-             }
+           loadEntities(Object.values(insertions));
+         } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
 
-             if (s === 0 || s === 1) {
-               // on an endpoint of line segment a
-               return noEndpointTouch ? null : [toPoint(a1, s, va)];
-             }
 
-             if (t === 0 || t === 1) {
-               // on an endpoint of line segment b
-               return noEndpointTouch ? null : [toPoint(b1, t, vb)];
-             }
+         tree.intersects = function (extent, graph) {
+           updateToGraph(graph);
+           return _rtree.search(extent.bbox()).map(function (bbox) {
+             return graph.entity(bbox.id);
+           });
+         }; // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
 
-             return [toPoint(a1, s, va)];
-           } // If we've reached this point, then the lines are either parallel or the
-         // same, but the segments could overlap partially or fully, or not at all.
-         // So we need to find the overlap, if any. To do that, we can use e, which is
-         // the (vector) difference between the two initial points. If this is parallel
-         // with the line itself, then the two lines are the same line, and there will
-         // be overlap.
-         //const sqrLenE = dotProduct(e, e);
 
+         tree.waySegments = function (extent, graph) {
+           updateToGraph(graph);
+           return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
+             return bbox.segment;
+           });
+         };
 
-         kross = crossProduct(e, va);
-         sqrKross = kross * kross;
+         return tree;
+       }
 
-         if (sqrKross > 0
-         /* EPS * sqLenB * sqLenE */
-         ) {
-             // Lines are just parallel, not the same. No overlap.
-             return null;
-           }
+       function svgIcon(name, svgklass, useklass) {
+         return function drawIcon(selection) {
+           selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : '')).data([0]).enter().append('svg').attr('class', 'icon ' + (svgklass || '')).append('use').attr('xlink:href', name).attr('class', useklass);
+         };
+       }
 
-         var sa = dotProduct(va, e) / sqrLenA;
-         var sb = sa + dotProduct(va, vb) / sqrLenA;
-         var smin = Math.min(sa, sb);
-         var smax = Math.max(sa, sb); // this is, essentially, the FindIntersection acting on floats from
-         // Schneider & Eberly, just inlined into this function.
+       function uiModal(selection, blocking) {
+         var _this = this;
 
-         if (smin <= 1 && smax >= 0) {
-           // overlap on an end point
-           if (smin === 1) {
-             return noEndpointTouch ? null : [toPoint(a1, smin > 0 ? smin : 0, va)];
-           }
+         var keybinding = utilKeybinding('modal');
+         var previous = selection.select('div.modal');
+         var animate = previous.empty();
+         previous.transition().duration(200).style('opacity', 0).remove();
+         var shaded = selection.append('div').attr('class', 'shaded').style('opacity', 0);
 
-           if (smax === 0) {
-             return noEndpointTouch ? null : [toPoint(a1, smax < 1 ? smax : 1, va)];
-           }
+         shaded.close = function () {
+           shaded.transition().duration(200).style('opacity', 0).remove();
+           modal.transition().duration(200).style('top', '0px');
+           select(document).call(keybinding.unbind);
+         };
 
-           if (noEndpointTouch && smin === 0 && smax === 1) return null; // There's overlap on a segment -- two points of intersection. Return both.
+         var modal = shaded.append('div').attr('class', 'modal fillL');
+         modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
 
-           return [toPoint(a1, smin > 0 ? smin : 0, va), toPoint(a1, smax < 1 ? smax : 1, va)];
+         if (!blocking) {
+           shaded.on('click.remove-modal', function (d3_event) {
+             if (d3_event.target === _this) {
+               shaded.close();
+             }
+           });
+           modal.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', shaded.close).call(svgIcon('#iD-icon-close'));
+           keybinding.on('⌫', shaded.close).on('⎋', shaded.close);
+           select(document).call(keybinding);
          }
 
-         return null;
-       }
-
-       /**
-        * @param  {SweepEvent} se1
-        * @param  {SweepEvent} se2
-        * @param  {Queue}      queue
-        * @return {Number}
-        */
+         modal.append('div').attr('class', 'content');
+         modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
 
-       function possibleIntersection(se1, se2, queue) {
-         // that disallows self-intersecting polygons,
-         // did cost us half a day, so I'll leave it
-         // out of respect
-         // if (se1.isSubject === se2.isSubject) return;
-         var inter = intersection(se1.point, se1.otherEvent.point, se2.point, se2.otherEvent.point);
-         var nintersections = inter ? inter.length : 0;
-         if (nintersections === 0) return 0; // no intersection
-         // the line segments intersect at an endpoint of both line segments
-
-         if (nintersections === 1 && (equals(se1.point, se2.point) || equals(se1.otherEvent.point, se2.otherEvent.point))) {
-           return 0;
+         if (animate) {
+           shaded.transition().style('opacity', 1);
+         } else {
+           shaded.style('opacity', 1);
          }
 
-         if (nintersections === 2 && se1.isSubject === se2.isSubject) {
-           // if(se1.contourId === se2.contourId){
-           // console.warn('Edges of the same polygon overlap',
-           //   se1.point, se1.otherEvent.point, se2.point, se2.otherEvent.point);
-           // }
-           //throw new Error('Edges of the same polygon overlap');
-           return 0;
-         } // The line segments associated to se1 and se2 intersect
-
-
-         if (nintersections === 1) {
-           // if the intersection point is not an endpoint of se1
-           if (!equals(se1.point, inter[0]) && !equals(se1.otherEvent.point, inter[0])) {
-             divideSegment(se1, inter[0], queue);
-           } // if the intersection point is not an endpoint of se2
+         return shaded;
 
+         function moveFocusToFirst() {
+           var node = modal // there are additional rules about what's focusable, but this suits our purposes
+           .select('a, button, input:not(.keytrap), select, textarea').node();
 
-           if (!equals(se2.point, inter[0]) && !equals(se2.otherEvent.point, inter[0])) {
-             divideSegment(se2, inter[0], queue);
+           if (node) {
+             node.focus();
+           } else {
+             select(this).node().blur();
            }
+         }
 
-           return 1;
-         } // The line segments associated to se1 and se2 overlap
+         function moveFocusToLast() {
+           var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
 
+           if (nodes.length) {
+             nodes[nodes.length - 1].focus();
+           } else {
+             select(this).node().blur();
+           }
+         }
+       }
 
-         var events = [];
-         var leftCoincide = false;
-         var rightCoincide = false;
+       function uiLoading(context) {
+         var _modalSelection = select(null);
 
-         if (equals(se1.point, se2.point)) {
-           leftCoincide = true; // linked
-         } else if (compareEvents(se1, se2) === 1) {
-           events.push(se2, se1);
-         } else {
-           events.push(se1, se2);
-         }
+         var _message = '';
+         var _blocking = false;
 
-         if (equals(se1.otherEvent.point, se2.otherEvent.point)) {
-           rightCoincide = true;
-         } else if (compareEvents(se1.otherEvent, se2.otherEvent) === 1) {
-           events.push(se2.otherEvent, se1.otherEvent);
-         } else {
-           events.push(se1.otherEvent, se2.otherEvent);
-         }
+         var loading = function loading(selection) {
+           _modalSelection = uiModal(selection, _blocking);
 
-         if (leftCoincide && rightCoincide || leftCoincide) {
-           // both line segments are equal or share the left endpoint
-           se2.type = NON_CONTRIBUTING;
-           se1.type = se2.inOut === se1.inOut ? SAME_TRANSITION : DIFFERENT_TRANSITION;
+           var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
 
-           if (leftCoincide && !rightCoincide) {
-             // honestly no idea, but changing events selection from [2, 1]
-             // to [0, 1] fixes the overlapping self-intersecting polygons issue
-             divideSegment(events[1].otherEvent, events[0].point, queue);
-           }
+           loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
+           loadertext.append('h3').html(_message);
 
-           return 2;
-         } // the line segments share the right endpoint
+           _modalSelection.select('button.close').attr('class', 'hide');
 
+           return loading;
+         };
 
-         if (rightCoincide) {
-           divideSegment(events[0], events[1].point, queue);
-           return 3;
-         } // no line segment includes totally the other one
+         loading.message = function (val) {
+           if (!arguments.length) return _message;
+           _message = val;
+           return loading;
+         };
 
+         loading.blocking = function (val) {
+           if (!arguments.length) return _blocking;
+           _blocking = val;
+           return loading;
+         };
 
-         if (events[0] !== events[3].otherEvent) {
-           divideSegment(events[0], events[1].point, queue);
-           divideSegment(events[1], events[2].point, queue);
-           return 3;
-         } // one line segment includes the other one
+         loading.close = function () {
+           _modalSelection.remove();
+         };
 
+         loading.isShown = function () {
+           return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+         };
 
-         divideSegment(events[0], events[1].point, queue);
-         divideSegment(events[3].otherEvent, events[2].point, queue);
-         return 3;
+         return loading;
        }
 
-       /**
-        * @param  {SweepEvent} le1
-        * @param  {SweepEvent} le2
-        * @return {Number}
-        */
+       function coreHistory(context) {
+         var dispatch = dispatch$8('reset', 'change', 'merge', 'restore', 'undone', 'redone', 'storage_error');
 
-       function compareSegments(le1, le2) {
-         if (le1 === le2) return 0; // Segments are not collinear
+         var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
 
-         if (signedArea(le1.point, le1.otherEvent.point, le2.point) !== 0 || signedArea(le1.point, le1.otherEvent.point, le2.otherEvent.point) !== 0) {
-           // If they share their left endpoint use the right endpoint to sort
-           if (equals(le1.point, le2.point)) return le1.isBelow(le2.otherEvent.point) ? -1 : 1; // Different left endpoint: use the left endpoint to sort
 
-           if (le1.point[0] === le2.point[0]) return le1.point[1] < le2.point[1] ? -1 : 1; // has the line segment associated to e1 been inserted
-           // into S after the line segment associated to e2 ?
+         var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
 
-           if (compareEvents(le1, le2) === 1) return le2.isAbove(le1.point) ? -1 : 1; // The line segment associated to e2 has been inserted
-           // into S after the line segment associated to e1
+         var duration = 150;
+         var _imageryUsed = [];
+         var _photoOverlaysUsed = [];
+         var _checkpoints = {};
 
-           return le1.isBelow(le2.point) ? -1 : 1;
-         }
+         var _pausedGraph;
 
-         if (le1.isSubject === le2.isSubject) {
-           // same polygon
-           var p1 = le1.point,
-               p2 = le2.point;
+         var _stack;
 
-           if (p1[0] === p2[0] && p1[1] === p2[1]
-           /*equals(le1.point, le2.point)*/
-           ) {
-               p1 = le1.otherEvent.point;
-               p2 = le2.otherEvent.point;
-               if (p1[0] === p2[0] && p1[1] === p2[1]) return 0;else return le1.contourId > le2.contourId ? 1 : -1;
-             }
-         } else {
-           // Segments are collinear, but belong to separate polygons
-           return le1.isSubject ? -1 : 1;
-         }
+         var _index;
 
-         return compareEvents(le1, le2) === 1 ? 1 : -1;
-       }
+         var _tree; // internal _act, accepts list of actions and eased time
 
-       function subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation) {
-         var sweepLine = new SplayTree(compareSegments);
-         var sortedEvents = [];
-         var rightbound = Math.min(sbbox[2], cbbox[2]);
-         var prev, next, begin;
 
-         while (eventQueue.length !== 0) {
-           var event = eventQueue.pop();
-           sortedEvents.push(event); // optimization by bboxes for intersection and difference goes here
+         function _act(actions, t) {
+           actions = Array.prototype.slice.call(actions);
+           var annotation;
 
-           if (operation === INTERSECTION && event.point[0] > rightbound || operation === DIFFERENCE && event.point[0] > sbbox[2]) {
-             break;
+           if (typeof actions[actions.length - 1] !== 'function') {
+             annotation = actions.pop();
            }
 
-           if (event.left) {
-             next = prev = sweepLine.insert(event);
-             begin = sweepLine.minNode();
-             if (prev !== begin) prev = sweepLine.prev(prev);else prev = null;
-             next = sweepLine.next(next);
-             var prevEvent = prev ? prev.key : null;
-             var prevprevEvent = void 0;
-             computeFields(event, prevEvent, operation);
-
-             if (next) {
-               if (possibleIntersection(event, next.key, eventQueue) === 2) {
-                 computeFields(event, prevEvent, operation);
-                 computeFields(event, next.key, operation);
-               }
-             }
-
-             if (prev) {
-               if (possibleIntersection(prev.key, event, eventQueue) === 2) {
-                 var prevprev = prev;
-                 if (prevprev !== begin) prevprev = sweepLine.prev(prevprev);else prevprev = null;
-                 prevprevEvent = prevprev ? prevprev.key : null;
-                 computeFields(prevEvent, prevprevEvent, operation);
-                 computeFields(event, prevEvent, operation);
-               }
-             }
-           } else {
-             event = event.otherEvent;
-             next = prev = sweepLine.find(event);
-
-             if (prev && next) {
-               if (prev !== begin) prev = sweepLine.prev(prev);else prev = null;
-               next = sweepLine.next(next);
-               sweepLine.remove(event);
+           var graph = _stack[_index].graph;
 
-               if (next && prev) {
-                 possibleIntersection(prev.key, next.key, eventQueue);
-               }
-             }
+           for (var i = 0; i < actions.length; i++) {
+             graph = actions[i](graph, t);
            }
-         }
 
-         return sortedEvents;
-       }
+           return {
+             graph: graph,
+             annotation: annotation,
+             imageryUsed: _imageryUsed,
+             photoOverlaysUsed: _photoOverlaysUsed,
+             transform: context.projection.transform(),
+             selectedIDs: context.selectedIDs()
+           };
+         } // internal _perform with eased time
 
-       var Contour = /*#__PURE__*/function () {
-         /**
-          * Contour
-          *
-          * @class {Contour}
-          */
-         function Contour() {
-           _classCallCheck(this, Contour);
 
-           this.points = [];
-           this.holeIds = [];
-           this.holeOf = null;
-           this.depth = null;
-         }
+         function _perform(args, t) {
+           var previous = _stack[_index].graph;
+           _stack = _stack.slice(0, _index + 1);
 
-         _createClass(Contour, [{
-           key: "isExterior",
-           value: function isExterior() {
-             return this.holeOf == null;
-           }
-         }]);
+           var actionResult = _act(args, t);
 
-         return Contour;
-       }();
+           _stack.push(actionResult);
 
-       /**
-        * @param  {Array.<SweepEvent>} sortedEvents
-        * @return {Array.<SweepEvent>}
-        */
+           _index++;
+           return change(previous);
+         } // internal _replace with eased time
 
-       function orderEvents(sortedEvents) {
-         var event, i, len, tmp;
-         var resultEvents = [];
 
-         for (i = 0, len = sortedEvents.length; i < len; i++) {
-           event = sortedEvents[i];
+         function _replace(args, t) {
+           var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
 
-           if (event.left && event.inResult || !event.left && event.otherEvent.inResult) {
-             resultEvents.push(event);
-           }
-         } // Due to overlapping edges the resultEvents array can be not wholly sorted
+           var actionResult = _act(args, t);
+
+           _stack[_index] = actionResult;
+           return change(previous);
+         } // internal _overwrite with eased time
 
 
-         var sorted = false;
+         function _overwrite(args, t) {
+           var previous = _stack[_index].graph;
 
-         while (!sorted) {
-           sorted = true;
+           if (_index > 0) {
+             _index--;
 
-           for (i = 0, len = resultEvents.length; i < len; i++) {
-             if (i + 1 < len && compareEvents(resultEvents[i], resultEvents[i + 1]) === 1) {
-               tmp = resultEvents[i];
-               resultEvents[i] = resultEvents[i + 1];
-               resultEvents[i + 1] = tmp;
-               sorted = false;
-             }
+             _stack.pop();
            }
-         }
-
-         for (i = 0, len = resultEvents.length; i < len; i++) {
-           event = resultEvents[i];
-           event.otherPos = i;
-         } // imagine, the right event is found in the beginning of the queue,
-         // when his left counterpart is not marked yet
 
+           _stack = _stack.slice(0, _index + 1);
 
-         for (i = 0, len = resultEvents.length; i < len; i++) {
-           event = resultEvents[i];
+           var actionResult = _act(args, t);
 
-           if (!event.left) {
-             tmp = event.otherPos;
-             event.otherPos = event.otherEvent.otherPos;
-             event.otherEvent.otherPos = tmp;
-           }
-         }
+           _stack.push(actionResult);
 
-         return resultEvents;
-       }
-       /**
-        * @param  {Number} pos
-        * @param  {Array.<SweepEvent>} resultEvents
-        * @param  {Object>}    processed
-        * @return {Number}
-        */
+           _index++;
+           return change(previous);
+         } // determine difference and dispatch a change event
 
 
-       function nextPos(pos, resultEvents, processed, origPos) {
-         var newPos = pos + 1,
-             p = resultEvents[pos].point,
-             p1;
-         var length = resultEvents.length;
-         if (newPos < length) p1 = resultEvents[newPos].point;
+         function change(previous) {
+           var difference = coreDifference(previous, history.graph());
 
-         while (newPos < length && p1[0] === p[0] && p1[1] === p[1]) {
-           if (!processed[newPos]) {
-             return newPos;
-           } else {
-             newPos++;
+           if (!_pausedGraph) {
+             dispatch.call('change', this, difference);
            }
 
-           p1 = resultEvents[newPos].point;
-         }
+           return difference;
+         } // iD uses namespaced keys so multiple installations do not conflict
 
-         newPos = pos - 1;
 
-         while (processed[newPos] && newPos > origPos) {
-           newPos--;
+         function getKey(n) {
+           return 'iD_' + window.location.origin + '_' + n;
          }
 
-         return newPos;
-       }
+         var history = {
+           graph: function graph() {
+             return _stack[_index].graph;
+           },
+           tree: function tree() {
+             return _tree;
+           },
+           base: function base() {
+             return _stack[0].graph;
+           },
+           merge: function merge(entities
+           /*, extent*/
+           ) {
+             var stack = _stack.map(function (state) {
+               return state.graph;
+             });
 
-       function initializeContourFromContext(event, contours, contourId) {
-         var contour = new Contour();
+             _stack[0].graph.rebase(entities, stack, false);
 
-         if (event.prevInResult != null) {
-           var prevInResult = event.prevInResult; // Note that it is valid to query the "previous in result" for its output contour id,
-           // because we must have already processed it (i.e., assigned an output contour id)
-           // in an earlier iteration, otherwise it wouldn't be possible that it is "previous in
-           // result".
+             _tree.rebase(entities, false);
 
-           var lowerContourId = prevInResult.outputContourId;
-           var lowerResultTransition = prevInResult.resultTransition;
+             dispatch.call('merge', this, entities);
+           },
+           perform: function perform() {
+             // complete any transition already in progress
+             select(document).interrupt('history.perform');
+             var transitionable = false;
+             var action0 = arguments[0];
 
-           if (lowerResultTransition > 0) {
-             // We are inside. Now we have to check if the thing below us is another hole or
-             // an exterior contour.
-             var lowerContour = contours[lowerContourId];
+             if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
+               transitionable = !!action0.transitionable;
+             }
 
-             if (lowerContour.holeOf != null) {
-               // The lower contour is a hole => Connect the new contour as a hole to its parent,
-               // and use same depth.
-               var parentContourId = lowerContour.holeOf;
-               contours[parentContourId].holeIds.push(contourId);
-               contour.holeOf = parentContourId;
-               contour.depth = contours[lowerContourId].depth;
+             if (transitionable) {
+               var origArguments = arguments;
+               select(document).transition('history.perform').duration(duration).ease(linear$1).tween('history.tween', function () {
+                 return function (t) {
+                   if (t < 1) _overwrite([action0], t);
+                 };
+               }).on('start', function () {
+                 _perform([action0], 0);
+               }).on('end interrupt', function () {
+                 _overwrite(origArguments, 1);
+               });
              } else {
-               // The lower contour is an exterior contour => Connect the new contour as a hole,
-               // and increment depth.
-               contours[lowerContourId].holeIds.push(contourId);
-               contour.holeOf = lowerContourId;
-               contour.depth = contours[lowerContourId].depth + 1;
+               return _perform(arguments);
              }
-           } else {
-             // We are outside => this contour is an exterior contour of same depth.
-             contour.holeOf = null;
-             contour.depth = contours[lowerContourId].depth;
-           }
-         } else {
-           // There is no lower/previous contour => this contour is an exterior contour of depth 0.
-           contour.holeOf = null;
-           contour.depth = 0;
-         }
+           },
+           replace: function replace() {
+             select(document).interrupt('history.perform');
+             return _replace(arguments, 1);
+           },
+           // Same as calling pop and then perform
+           overwrite: function overwrite() {
+             select(document).interrupt('history.perform');
+             return _overwrite(arguments, 1);
+           },
+           pop: function pop(n) {
+             select(document).interrupt('history.perform');
+             var previous = _stack[_index].graph;
 
-         return contour;
-       }
-       /**
-        * @param  {Array.<SweepEvent>} sortedEvents
-        * @return {Array.<*>} polygons
-        */
+             if (isNaN(+n) || +n < 0) {
+               n = 1;
+             }
 
+             while (n-- > 0 && _index > 0) {
+               _index--;
 
-       function connectEdges(sortedEvents) {
-         var i, len;
-         var resultEvents = orderEvents(sortedEvents); // "false"-filled array
+               _stack.pop();
+             }
 
-         var processed = {};
-         var contours = [];
+             return change(previous);
+           },
+           // Back to the previous annotated state or _index = 0.
+           undo: function undo() {
+             select(document).interrupt('history.perform');
+             var previousStack = _stack[_index];
+             var previous = previousStack.graph;
 
-         var _loop = function _loop() {
-           if (processed[i]) {
-             return "continue";
-           }
+             while (_index > 0) {
+               _index--;
+               if (_stack[_index].annotation) break;
+             }
 
-           var contourId = contours.length;
-           var contour = initializeContourFromContext(resultEvents[i], contours, contourId); // Helper function that combines marking an event as processed with assigning its output contour ID
+             dispatch.call('undone', this, _stack[_index], previousStack);
+             return change(previous);
+           },
+           // Forward to the next annotated state.
+           redo: function redo() {
+             select(document).interrupt('history.perform');
+             var previousStack = _stack[_index];
+             var previous = previousStack.graph;
+             var tryIndex = _index;
 
-           var markAsProcessed = function markAsProcessed(pos) {
-             processed[pos] = true;
-             resultEvents[pos].outputContourId = contourId;
-           };
+             while (tryIndex < _stack.length - 1) {
+               tryIndex++;
 
-           var pos = i;
-           var origPos = i;
-           var initial = resultEvents[i].point;
-           contour.points.push(initial);
-           /* eslint no-constant-condition: "off" */
+               if (_stack[tryIndex].annotation) {
+                 _index = tryIndex;
+                 dispatch.call('redone', this, _stack[_index], previousStack);
+                 break;
+               }
+             }
 
-           while (true) {
-             markAsProcessed(pos);
-             pos = resultEvents[pos].otherPos;
-             markAsProcessed(pos);
-             contour.points.push(resultEvents[pos].point);
-             pos = nextPos(pos, resultEvents, processed, origPos);
+             return change(previous);
+           },
+           pauseChangeDispatch: function pauseChangeDispatch() {
+             if (!_pausedGraph) {
+               _pausedGraph = _stack[_index].graph;
+             }
+           },
+           resumeChangeDispatch: function resumeChangeDispatch() {
+             if (_pausedGraph) {
+               var previous = _pausedGraph;
+               _pausedGraph = null;
+               return change(previous);
+             }
+           },
+           undoAnnotation: function undoAnnotation() {
+             var i = _index;
 
-             if (pos == origPos) {
-               break;
+             while (i >= 0) {
+               if (_stack[i].annotation) return _stack[i].annotation;
+               i--;
              }
-           }
+           },
+           redoAnnotation: function redoAnnotation() {
+             var i = _index + 1;
 
-           contours.push(contour);
-         };
+             while (i <= _stack.length - 1) {
+               if (_stack[i].annotation) return _stack[i].annotation;
+               i++;
+             }
+           },
+           // Returns the entities from the active graph with bounding boxes
+           // overlapping the given `extent`.
+           intersects: function intersects(extent) {
+             return _tree.intersects(extent, _stack[_index].graph);
+           },
+           difference: function difference() {
+             var base = _stack[0].graph;
+             var head = _stack[_index].graph;
+             return coreDifference(base, head);
+           },
+           changes: function changes(action) {
+             var base = _stack[0].graph;
+             var head = _stack[_index].graph;
+
+             if (action) {
+               head = action(head);
+             }
 
-         for (i = 0, len = resultEvents.length; i < len; i++) {
-           var _ret = _loop();
+             var difference = coreDifference(base, head);
+             return {
+               modified: difference.modified(),
+               created: difference.created(),
+               deleted: difference.deleted()
+             };
+           },
+           hasChanges: function hasChanges() {
+             return this.difference().length() > 0;
+           },
+           imageryUsed: function imageryUsed(sources) {
+             if (sources) {
+               _imageryUsed = sources;
+               return history;
+             } else {
+               var s = new Set();
 
-           if (_ret === "continue") continue;
-         }
+               _stack.slice(1, _index + 1).forEach(function (state) {
+                 state.imageryUsed.forEach(function (source) {
+                   if (source !== 'Custom') {
+                     s.add(source);
+                   }
+                 });
+               });
 
-         return contours;
-       }
+               return Array.from(s);
+             }
+           },
+           photoOverlaysUsed: function photoOverlaysUsed(sources) {
+             if (sources) {
+               _photoOverlaysUsed = sources;
+               return history;
+             } else {
+               var s = new Set();
 
-       var tinyqueue = TinyQueue;
-       var _default$1 = TinyQueue;
+               _stack.slice(1, _index + 1).forEach(function (state) {
+                 if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
+                   state.photoOverlaysUsed.forEach(function (photoOverlay) {
+                     s.add(photoOverlay);
+                   });
+                 }
+               });
 
-       function TinyQueue(data, compare) {
-         if (!(this instanceof TinyQueue)) return new TinyQueue(data, compare);
-         this.data = data || [];
-         this.length = this.data.length;
-         this.compare = compare || defaultCompare$1;
+               return Array.from(s);
+             }
+           },
+           // save the current history state
+           checkpoint: function checkpoint(key) {
+             _checkpoints[key] = {
+               stack: _stack,
+               index: _index
+             };
+             return history;
+           },
+           // restore history state to a given checkpoint or reset completely
+           reset: function reset(key) {
+             if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
+               _stack = _checkpoints[key].stack;
+               _index = _checkpoints[key].index;
+             } else {
+               _stack = [{
+                 graph: coreGraph()
+               }];
+               _index = 0;
+               _tree = coreTree(_stack[0].graph);
+               _checkpoints = {};
+             }
 
-         if (this.length > 0) {
-           for (var i = (this.length >> 1) - 1; i >= 0; i--) {
-             this._down(i);
-           }
-         }
-       }
+             dispatch.call('reset');
+             dispatch.call('change');
+             return history;
+           },
+           // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
+           //
+           // To use it:
+           //  1. Start the walkthrough.
+           //  2. Get to a "free editing" tutorial step
+           //  3. Make your edits to the walkthrough map
+           //  4. In your browser dev console run:
+           //        `id.history().toIntroGraph()`
+           //  5. This outputs stringified JSON to the browser console
+           //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
+           toIntroGraph: function toIntroGraph() {
+             var nextID = {
+               n: 0,
+               r: 0,
+               w: 0
+             };
+             var permIDs = {};
+             var graph = this.graph();
+             var baseEntities = {}; // clone base entities..
 
-       function defaultCompare$1(a, b) {
-         return a < b ? -1 : a > b ? 1 : 0;
-       }
+             Object.values(graph.base().entities).forEach(function (entity) {
+               var copy = copyIntroEntity(entity);
+               baseEntities[copy.id] = copy;
+             }); // replace base entities with head entities..
 
-       TinyQueue.prototype = {
-         push: function push(item) {
-           this.data.push(item);
-           this.length++;
+             Object.keys(graph.entities).forEach(function (id) {
+               var entity = graph.entities[id];
 
-           this._up(this.length - 1);
-         },
-         pop: function pop() {
-           if (this.length === 0) return undefined;
-           var top = this.data[0];
-           this.length--;
+               if (entity) {
+                 var copy = copyIntroEntity(entity);
+                 baseEntities[copy.id] = copy;
+               } else {
+                 delete baseEntities[id];
+               }
+             }); // swap temporary for permanent ids..
 
-           if (this.length > 0) {
-             this.data[0] = this.data[this.length];
+             Object.values(baseEntities).forEach(function (entity) {
+               if (Array.isArray(entity.nodes)) {
+                 entity.nodes = entity.nodes.map(function (node) {
+                   return permIDs[node] || node;
+                 });
+               }
 
-             this._down(0);
-           }
+               if (Array.isArray(entity.members)) {
+                 entity.members = entity.members.map(function (member) {
+                   member.id = permIDs[member.id] || member.id;
+                   return member;
+                 });
+               }
+             });
+             return JSON.stringify({
+               dataIntroGraph: baseEntities
+             });
 
-           this.data.pop();
-           return top;
-         },
-         peek: function peek() {
-           return this.data[0];
-         },
-         _up: function _up(pos) {
-           var data = this.data;
-           var compare = this.compare;
-           var item = data[pos];
+             function copyIntroEntity(source) {
+               var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']); // Note: the copy is no longer an osmEntity, so it might not have `tags`
 
-           while (pos > 0) {
-             var parent = pos - 1 >> 1;
-             var current = data[parent];
-             if (compare(item, current) >= 0) break;
-             data[pos] = current;
-             pos = parent;
-           }
+               if (copy.tags && !Object.keys(copy.tags)) {
+                 delete copy.tags;
+               }
 
-           data[pos] = item;
-         },
-         _down: function _down(pos) {
-           var data = this.data;
-           var compare = this.compare;
-           var halfLength = this.length >> 1;
-           var item = data[pos];
+               if (Array.isArray(copy.loc)) {
+                 copy.loc[0] = +copy.loc[0].toFixed(6);
+                 copy.loc[1] = +copy.loc[1].toFixed(6);
+               }
 
-           while (pos < halfLength) {
-             var left = (pos << 1) + 1;
-             var right = left + 1;
-             var best = data[left];
+               var match = source.id.match(/([nrw])-\d*/); // temporary id
 
-             if (right < this.length && compare(data[right], best) < 0) {
-               left = right;
-               best = data[right];
-             }
+               if (match !== null) {
+                 var nrw = match[1];
+                 var permID;
 
-             if (compare(best, item) >= 0) break;
-             data[pos] = best;
-             pos = left;
-           }
+                 do {
+                   permID = nrw + ++nextID[nrw];
+                 } while (baseEntities.hasOwnProperty(permID));
+
+                 copy.id = permIDs[source.id] = permID;
+               }
+
+               return copy;
+             }
+           },
+           toJSON: function toJSON() {
+             if (!this.hasChanges()) return;
+             var allEntities = {};
+             var baseEntities = {};
+             var base = _stack[0];
 
-           data[pos] = item;
-         }
-       };
-       tinyqueue["default"] = _default$1;
+             var s = _stack.map(function (i) {
+               var modified = [];
+               var deleted = [];
+               Object.keys(i.graph.entities).forEach(function (id) {
+                 var entity = i.graph.entities[id];
 
-       var max$5 = Math.max;
-       var min$a = Math.min;
-       var contourId = 0;
+                 if (entity) {
+                   var key = osmEntity.key(entity);
+                   allEntities[key] = entity;
+                   modified.push(key);
+                 } else {
+                   deleted.push(id);
+                 } // make sure that the originals of changed or deleted entities get merged
+                 // into the base of the _stack after restoring the data from JSON.
 
-       function processPolygon(contourOrHole, isSubject, depth, Q, bbox, isExteriorRing) {
-         var i, len, s1, s2, e1, e2;
 
-         for (i = 0, len = contourOrHole.length - 1; i < len; i++) {
-           s1 = contourOrHole[i];
-           s2 = contourOrHole[i + 1];
-           e1 = new SweepEvent(s1, false, undefined, isSubject);
-           e2 = new SweepEvent(s2, false, e1, isSubject);
-           e1.otherEvent = e2;
+                 if (id in base.graph.entities) {
+                   baseEntities[id] = base.graph.entities[id];
+                 }
 
-           if (s1[0] === s2[0] && s1[1] === s2[1]) {
-             continue; // skip collapsed edges, or it breaks
-           }
+                 if (entity && entity.nodes) {
+                   // get originals of pre-existing child nodes
+                   entity.nodes.forEach(function (nodeID) {
+                     if (nodeID in base.graph.entities) {
+                       baseEntities[nodeID] = base.graph.entities[nodeID];
+                     }
+                   });
+                 } // get originals of parent entities too
 
-           e1.contourId = e2.contourId = depth;
 
-           if (!isExteriorRing) {
-             e1.isExteriorRing = false;
-             e2.isExteriorRing = false;
-           }
+                 var baseParents = base.graph._parentWays[id];
 
-           if (compareEvents(e1, e2) > 0) {
-             e2.left = true;
-           } else {
-             e1.left = true;
-           }
+                 if (baseParents) {
+                   baseParents.forEach(function (parentID) {
+                     if (parentID in base.graph.entities) {
+                       baseEntities[parentID] = base.graph.entities[parentID];
+                     }
+                   });
+                 }
+               });
+               var x = {};
+               if (modified.length) x.modified = modified;
+               if (deleted.length) x.deleted = deleted;
+               if (i.imageryUsed) x.imageryUsed = i.imageryUsed;
+               if (i.photoOverlaysUsed) x.photoOverlaysUsed = i.photoOverlaysUsed;
+               if (i.annotation) x.annotation = i.annotation;
+               if (i.transform) x.transform = i.transform;
+               if (i.selectedIDs) x.selectedIDs = i.selectedIDs;
+               return x;
+             });
 
-           var x = s1[0],
-               y = s1[1];
-           bbox[0] = min$a(bbox[0], x);
-           bbox[1] = min$a(bbox[1], y);
-           bbox[2] = max$5(bbox[2], x);
-           bbox[3] = max$5(bbox[3], y); // Pushing it so the queue is sorted from left to right,
-           // with object on the left having the highest priority.
+             return JSON.stringify({
+               version: 3,
+               entities: Object.values(allEntities),
+               baseEntities: Object.values(baseEntities),
+               stack: s,
+               nextIDs: osmEntity.id.next,
+               index: _index,
+               // note the time the changes were saved
+               timestamp: new Date().getTime()
+             });
+           },
+           fromJSON: function fromJSON(json, loadChildNodes) {
+             var h = JSON.parse(json);
+             var loadComplete = true;
+             osmEntity.id.next = h.nextIDs;
+             _index = h.index;
 
-           Q.push(e1);
-           Q.push(e2);
-         }
-       }
+             if (h.version === 2 || h.version === 3) {
+               var allEntities = {};
+               h.entities.forEach(function (entity) {
+                 allEntities[osmEntity.key(entity)] = osmEntity(entity);
+               });
 
-       function fillQueue(subject, clipping, sbbox, cbbox, operation) {
-         var eventQueue = new tinyqueue(null, compareEvents);
-         var polygonSet, isExteriorRing, i, ii, j, jj; //, k, kk;
+               if (h.version === 3) {
+                 // This merges originals for changed entities into the base of
+                 // the _stack even if the current _stack doesn't have them (for
+                 // example when iD has been restarted in a different region)
+                 var baseEntities = h.baseEntities.map(function (d) {
+                   return osmEntity(d);
+                 });
 
-         for (i = 0, ii = subject.length; i < ii; i++) {
-           polygonSet = subject[i];
+                 var stack = _stack.map(function (state) {
+                   return state.graph;
+                 });
 
-           for (j = 0, jj = polygonSet.length; j < jj; j++) {
-             isExteriorRing = j === 0;
-             if (isExteriorRing) contourId++;
-             processPolygon(polygonSet[j], true, contourId, eventQueue, sbbox, isExteriorRing);
-           }
-         }
+                 _stack[0].graph.rebase(baseEntities, stack, true);
 
-         for (i = 0, ii = clipping.length; i < ii; i++) {
-           polygonSet = clipping[i];
+                 _tree.rebase(baseEntities, true); // When we restore a modified way, we also need to fetch any missing
+                 // childnodes that would normally have been downloaded with it.. #2142
 
-           for (j = 0, jj = polygonSet.length; j < jj; j++) {
-             isExteriorRing = j === 0;
-             if (operation === DIFFERENCE) isExteriorRing = false;
-             if (isExteriorRing) contourId++;
-             processPolygon(polygonSet[j], false, contourId, eventQueue, cbbox, isExteriorRing);
-           }
-         }
 
-         return eventQueue;
-       }
+                 if (loadChildNodes) {
+                   var osm = context.connection();
+                   var baseWays = baseEntities.filter(function (e) {
+                     return e.type === 'way';
+                   });
+                   var nodeIDs = baseWays.reduce(function (acc, way) {
+                     return utilArrayUnion(acc, way.nodes);
+                   }, []);
+                   var missing = nodeIDs.filter(function (n) {
+                     return !_stack[0].graph.hasEntity(n);
+                   });
 
-       var EMPTY = [];
+                   if (missing.length && osm) {
+                     loadComplete = false;
+                     context.map().redrawEnable(false);
+                     var loading = uiLoading(context).blocking(true);
+                     context.container().call(loading);
 
-       function trivialOperation(subject, clipping, operation) {
-         var result = null;
+                     var childNodesLoaded = function childNodesLoaded(err, result) {
+                       if (!err) {
+                         var visibleGroups = utilArrayGroupBy(result.data, 'visible');
+                         var visibles = visibleGroups["true"] || []; // alive nodes
 
-         if (subject.length * clipping.length === 0) {
-           if (operation === INTERSECTION) {
-             result = EMPTY;
-           } else if (operation === DIFFERENCE) {
-             result = subject;
-           } else if (operation === UNION || operation === XOR) {
-             result = subject.length === 0 ? clipping : subject;
-           }
-         }
+                         var invisibles = visibleGroups["false"] || []; // deleted nodes
 
-         return result;
-       }
+                         if (visibles.length) {
+                           var visibleIDs = visibles.map(function (entity) {
+                             return entity.id;
+                           });
 
-       function compareBBoxes(subject, clipping, sbbox, cbbox, operation) {
-         var result = null;
+                           var stack = _stack.map(function (state) {
+                             return state.graph;
+                           });
 
-         if (sbbox[0] > cbbox[2] || cbbox[0] > sbbox[2] || sbbox[1] > cbbox[3] || cbbox[1] > sbbox[3]) {
-           if (operation === INTERSECTION) {
-             result = EMPTY;
-           } else if (operation === DIFFERENCE) {
-             result = subject;
-           } else if (operation === UNION || operation === XOR) {
-             result = subject.concat(clipping);
-           }
-         }
+                           missing = utilArrayDifference(missing, visibleIDs);
 
-         return result;
-       }
+                           _stack[0].graph.rebase(visibles, stack, true);
 
-       function _boolean(subject, clipping, operation) {
-         if (typeof subject[0][0][0] === 'number') {
-           subject = [subject];
-         }
+                           _tree.rebase(visibles, true);
+                         } // fetch older versions of nodes that were deleted..
 
-         if (typeof clipping[0][0][0] === 'number') {
-           clipping = [clipping];
-         }
 
-         var trivial = trivialOperation(subject, clipping, operation);
+                         invisibles.forEach(function (entity) {
+                           osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
+                         });
+                       }
 
-         if (trivial) {
-           return trivial === EMPTY ? null : trivial;
-         }
+                       if (err || !missing.length) {
+                         loading.close();
+                         context.map().redrawEnable(true);
+                         dispatch.call('change');
+                         dispatch.call('restore', this);
+                       }
+                     };
 
-         var sbbox = [Infinity, Infinity, -Infinity, -Infinity];
-         var cbbox = [Infinity, Infinity, -Infinity, -Infinity]; // console.time('fill queue');
+                     osm.loadMultiple(missing, childNodesLoaded);
+                   }
+                 }
+               }
 
-         var eventQueue = fillQueue(subject, clipping, sbbox, cbbox, operation); //console.timeEnd('fill queue');
+               _stack = h.stack.map(function (d) {
+                 var entities = {},
+                     entity;
 
-         trivial = compareBBoxes(subject, clipping, sbbox, cbbox, operation);
+                 if (d.modified) {
+                   d.modified.forEach(function (key) {
+                     entity = allEntities[key];
+                     entities[entity.id] = entity;
+                   });
+                 }
 
-         if (trivial) {
-           return trivial === EMPTY ? null : trivial;
-         } // console.time('subdivide edges');
+                 if (d.deleted) {
+                   d.deleted.forEach(function (id) {
+                     entities[id] = undefined;
+                   });
+                 }
 
+                 return {
+                   graph: coreGraph(_stack[0].graph).load(entities),
+                   annotation: d.annotation,
+                   imageryUsed: d.imageryUsed,
+                   photoOverlaysUsed: d.photoOverlaysUsed,
+                   transform: d.transform,
+                   selectedIDs: d.selectedIDs
+                 };
+               });
+             } else {
+               // original version
+               _stack = h.stack.map(function (d) {
+                 var entities = {};
 
-         var sortedEvents = subdivide(eventQueue, subject, clipping, sbbox, cbbox, operation); //console.timeEnd('subdivide edges');
-         // console.time('connect vertices');
+                 for (var i in d.entities) {
+                   var entity = d.entities[i];
+                   entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+                 }
 
-         var contours = connectEdges(sortedEvents); //console.timeEnd('connect vertices');
-         // Convert contours to polygons
+                 d.graph = coreGraph(_stack[0].graph).load(entities);
+                 return d;
+               });
+             }
 
-         var polygons = [];
+             var transform = _stack[_index].transform;
 
-         for (var i = 0; i < contours.length; i++) {
-           var contour = contours[i];
+             if (transform) {
+               context.map().transformEase(transform, 0); // 0 = immediate, no easing
+             }
 
-           if (contour.isExterior()) {
-             // The exterior ring goes first
-             var rings = [contour.points]; // Followed by holes if any
+             if (loadComplete) {
+               dispatch.call('change');
+               dispatch.call('restore', this);
+             }
 
-             for (var j = 0; j < contour.holeIds.length; j++) {
-               var holeId = contour.holeIds[j];
-               rings.push(contours[holeId].points);
+             return history;
+           },
+           lock: function lock() {
+             return _lock.lock();
+           },
+           unlock: function unlock() {
+             _lock.unlock();
+           },
+           save: function save() {
+             if (_lock.locked() && // don't overwrite existing, unresolved changes
+             !_hasUnresolvedRestorableChanges) {
+               var success = corePreferences(getKey('saved_history'), history.toJSON() || null);
+               if (!success) dispatch.call('storage_error');
              }
 
-             polygons.push(rings);
-           }
-         }
+             return history;
+           },
+           // delete the history version saved in localStorage
+           clearSaved: function clearSaved() {
+             context.debouncedSave.cancel();
 
-         return polygons;
-       }
+             if (_lock.locked()) {
+               _hasUnresolvedRestorableChanges = false;
+               corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
+
+               corePreferences('comment', null);
+               corePreferences('hashtags', null);
+               corePreferences('source', null);
+             }
 
-       function union(subject, clipping) {
-         return _boolean(subject, clipping, UNION);
+             return history;
+           },
+           savedHistoryJSON: function savedHistoryJSON() {
+             return corePreferences(getKey('saved_history'));
+           },
+           hasRestorableChanges: function hasRestorableChanges() {
+             return _hasUnresolvedRestorableChanges;
+           },
+           // load history from a version stored in localStorage
+           restore: function restore() {
+             if (_lock.locked()) {
+               _hasUnresolvedRestorableChanges = false;
+               var json = this.savedHistoryJSON();
+               if (json) history.fromJSON(json, true);
+             }
+           },
+           _getKey: getKey
+         };
+         history.reset();
+         return utilRebind(history, dispatch, 'on');
        }
 
-       /*! ieee754. BSD-3-Clause License. Feross Aboukhadijeh <https://feross.org/opensource> */
-       var read$6 = function read(buffer, offset, isLE, mLen, nBytes) {
-         var e, m;
-         var eLen = nBytes * 8 - mLen - 1;
-         var eMax = (1 << eLen) - 1;
-         var eBias = eMax >> 1;
-         var nBits = -7;
-         var i = isLE ? nBytes - 1 : 0;
-         var d = isLE ? -1 : 1;
-         var s = buffer[offset + i];
-         i += d;
-         e = s & (1 << -nBits) - 1;
-         s >>= -nBits;
-         nBits += eLen;
+       /**
+        * Look for roads that can be connected to other roads with a short extension
+        */
 
-         for (; nBits > 0; e = e * 256 + buffer[offset + i], i += d, nBits -= 8) {}
+       function validationAlmostJunction(context) {
+         var type = 'almost_junction';
+         var EXTEND_TH_METERS = 5;
+         var WELD_TH_METERS = 0.75; // Comes from considering bounding case of parallel ways
 
-         m = e & (1 << -nBits) - 1;
-         e >>= -nBits;
-         nBits += mLen;
+         var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
 
-         for (; nBits > 0; m = m * 256 + buffer[offset + i], i += d, nBits -= 8) {}
+         var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
 
-         if (e === 0) {
-           e = 1 - eBias;
-         } else if (e === eMax) {
-           return m ? NaN : (s ? -1 : 1) * Infinity;
-         } else {
-           m = m + Math.pow(2, mLen);
-           e = e - eBias;
+         function isHighway(entity) {
+           return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
          }
 
-         return (s ? -1 : 1) * m * Math.pow(2, e - mLen);
-       };
-
-       var write$6 = function write(buffer, value, offset, isLE, mLen, nBytes) {
-         var e, m, c;
-         var eLen = nBytes * 8 - mLen - 1;
-         var eMax = (1 << eLen) - 1;
-         var eBias = eMax >> 1;
-         var rt = mLen === 23 ? Math.pow(2, -24) - Math.pow(2, -77) : 0;
-         var i = isLE ? 0 : nBytes - 1;
-         var d = isLE ? 1 : -1;
-         var s = value < 0 || value === 0 && 1 / value < 0 ? 1 : 0;
-         value = Math.abs(value);
-
-         if (isNaN(value) || value === Infinity) {
-           m = isNaN(value) ? 1 : 0;
-           e = eMax;
-         } else {
-           e = Math.floor(Math.log(value) / Math.LN2);
-
-           if (value * (c = Math.pow(2, -e)) < 1) {
-             e--;
-             c *= 2;
-           }
-
-           if (e + eBias >= 1) {
-             value += rt / c;
-           } else {
-             value += rt * Math.pow(2, 1 - eBias);
-           }
-
-           if (value * c >= 2) {
-             e++;
-             c /= 2;
-           }
-
-           if (e + eBias >= eMax) {
-             m = 0;
-             e = eMax;
-           } else if (e + eBias >= 1) {
-             m = (value * c - 1) * Math.pow(2, mLen);
-             e = e + eBias;
-           } else {
-             m = value * Math.pow(2, eBias - 1) * Math.pow(2, mLen);
-             e = 0;
-           }
+         function isTaggedAsNotContinuing(node) {
+           return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
          }
 
-         for (; mLen >= 8; buffer[offset + i] = m & 0xff, i += d, m /= 256, mLen -= 8) {}
-
-         e = e << mLen | m;
-         eLen += mLen;
-
-         for (; eLen > 0; buffer[offset + i] = e & 0xff, i += d, e /= 256, eLen -= 8) {}
+         var validation = function checkAlmostJunction(entity, graph) {
+           if (!isHighway(entity)) return [];
+           if (entity.isDegenerate()) return [];
+           var tree = context.history().tree();
+           var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
+           var issues = [];
+           extendableNodeInfos.forEach(function (extendableNodeInfo) {
+             issues.push(new validationIssue({
+               type: type,
+               subtype: 'highway-highway',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity1 = context.hasEntity(this.entityIds[0]);
 
-         buffer[offset + i - d] |= s * 128;
-       };
+                 if (this.entityIds[0] === this.entityIds[2]) {
+                   return entity1 ? _t.html('issues.almost_junction.self.message', {
+                     feature: utilDisplayLabel(entity1, context.graph())
+                   }) : '';
+                 } else {
+                   var entity2 = context.hasEntity(this.entityIds[2]);
+                   return entity1 && entity2 ? _t.html('issues.almost_junction.message', {
+                     feature: utilDisplayLabel(entity1, context.graph()),
+                     feature2: utilDisplayLabel(entity2, context.graph())
+                   }) : '';
+                 }
+               },
+               reference: showReference,
+               entityIds: [entity.id, extendableNodeInfo.node.id, extendableNodeInfo.wid],
+               loc: extendableNodeInfo.node.loc,
+               hash: JSON.stringify(extendableNodeInfo.node.loc),
+               data: {
+                 midId: extendableNodeInfo.mid.id,
+                 edge: extendableNodeInfo.edge,
+                 cross_loc: extendableNodeInfo.cross_loc
+               },
+               dynamicFixes: makeFixes
+             }));
+           });
+           return issues;
 
-       var ieee754$1 = {
-         read: read$6,
-         write: write$6
-       };
+           function makeFixes(context) {
+             var fixes = [new validationIssueFix({
+               icon: 'iD-icon-abutment',
+               title: _t.html('issues.fix.connect_features.title'),
+               onClick: function onClick(context) {
+                 var annotation = _t('issues.fix.connect_almost_junction.annotation');
 
-       var pbf = Pbf;
+                 var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
+                     endNodeId = _this$issue$entityIds[1],
+                     crossWayId = _this$issue$entityIds[2];
 
-       function Pbf(buf) {
-         this.buf = ArrayBuffer.isView && ArrayBuffer.isView(buf) ? buf : new Uint8Array(buf || 0);
-         this.pos = 0;
-         this.type = 0;
-         this.length = this.buf.length;
-       }
+                 var midNode = context.entity(this.issue.data.midId);
+                 var endNode = context.entity(endNodeId);
+                 var crossWay = context.entity(crossWayId); // When endpoints are close, just join if resulting small change in angle (#7201)
 
-       Pbf.Varint = 0; // varint: int32, int64, uint32, uint64, sint32, sint64, bool, enum
+                 var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
 
-       Pbf.Fixed64 = 1; // 64-bit: double, fixed64, sfixed64
+                 if (nearEndNodes.length > 0) {
+                   var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
 
-       Pbf.Bytes = 2; // length-delimited: string, bytes, embedded messages, packed repeated fields
+                   if (collinear) {
+                     context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
+                     return;
+                   }
+                 }
 
-       Pbf.Fixed32 = 5; // 32-bit: float, fixed32, sfixed32
+                 var targetEdge = this.issue.data.edge;
+                 var crossLoc = this.issue.data.cross_loc;
+                 var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
+                 var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc); // already a point nearby, just connect to that
 
-       var SHIFT_LEFT_32 = (1 << 16) * (1 << 16),
-           SHIFT_RIGHT_32 = 1 / SHIFT_LEFT_32; // Threshold chosen based on both benchmarking and knowledge about browser string
-       // data structures (which currently switch structure types at 12 bytes or more)
+                 if (closestNodeInfo.distance < WELD_TH_METERS) {
+                   context.perform(actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc), annotation); // else add the end node to the edge way
+                 } else {
+                   context.perform(actionAddMidpoint({
+                     loc: crossLoc,
+                     edge: targetEdge
+                   }, endNode), annotation);
+                 }
+               }
+             })];
+             var node = context.hasEntity(this.entityIds[1]);
 
-       var TEXT_DECODER_MIN_LENGTH = 12;
-       var utf8TextDecoder = typeof TextDecoder === 'undefined' ? null : new TextDecoder('utf8');
-       Pbf.prototype = {
-         destroy: function destroy() {
-           this.buf = null;
-         },
-         // === READING =================================================================
-         readFields: function readFields(readField, result, end) {
-           end = end || this.length;
+             if (node && !node.hasInterestingTags()) {
+               // node has no descriptive tags, suggest noexit fix
+               fixes.push(new validationIssueFix({
+                 icon: 'maki-barrier',
+                 title: _t.html('issues.fix.tag_as_disconnected.title'),
+                 onClick: function onClick(context) {
+                   var nodeID = this.issue.entityIds[1];
+                   var tags = Object.assign({}, context.entity(nodeID).tags);
+                   tags.noexit = 'yes';
+                   context.perform(actionChangeTags(nodeID, tags), _t('issues.fix.tag_as_disconnected.annotation'));
+                 }
+               }));
+             }
 
-           while (this.pos < end) {
-             var val = this.readVarint(),
-                 tag = val >> 3,
-                 startPos = this.pos;
-             this.type = val & 0x7;
-             readField(tag, result, this);
-             if (this.pos === startPos) this.skip(val);
+             return fixes;
            }
 
-           return result;
-         },
-         readMessage: function readMessage(readField, result) {
-           return this.readFields(readField, result, this.readVarint() + this.pos);
-         },
-         readFixed32: function readFixed32() {
-           var val = readUInt32(this.buf, this.pos);
-           this.pos += 4;
-           return val;
-         },
-         readSFixed32: function readSFixed32() {
-           var val = readInt32(this.buf, this.pos);
-           this.pos += 4;
-           return val;
-         },
-         // 64-bit int handling is based on github.com/dpw/node-buffer-more-ints (MIT-licensed)
-         readFixed64: function readFixed64() {
-           var val = readUInt32(this.buf, this.pos) + readUInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-           this.pos += 8;
-           return val;
-         },
-         readSFixed64: function readSFixed64() {
-           var val = readUInt32(this.buf, this.pos) + readInt32(this.buf, this.pos + 4) * SHIFT_LEFT_32;
-           this.pos += 8;
-           return val;
-         },
-         readFloat: function readFloat() {
-           var val = ieee754$1.read(this.buf, this.pos, true, 23, 4);
-           this.pos += 4;
-           return val;
-         },
-         readDouble: function readDouble() {
-           var val = ieee754$1.read(this.buf, this.pos, true, 52, 8);
-           this.pos += 8;
-           return val;
-         },
-         readVarint: function readVarint(isSigned) {
-           var buf = this.buf,
-               val,
-               b;
-           b = buf[this.pos++];
-           val = b & 0x7f;
-           if (b < 0x80) return val;
-           b = buf[this.pos++];
-           val |= (b & 0x7f) << 7;
-           if (b < 0x80) return val;
-           b = buf[this.pos++];
-           val |= (b & 0x7f) << 14;
-           if (b < 0x80) return val;
-           b = buf[this.pos++];
-           val |= (b & 0x7f) << 21;
-           if (b < 0x80) return val;
-           b = buf[this.pos];
-           val |= (b & 0x0f) << 28;
-           return readVarintRemainder(val, isSigned, this);
-         },
-         readVarint64: function readVarint64() {
-           // for compatibility with v2.0.1
-           return this.readVarint(true);
-         },
-         readSVarint: function readSVarint() {
-           var num = this.readVarint();
-           return num % 2 === 1 ? (num + 1) / -2 : num / 2; // zigzag encoding
-         },
-         readBoolean: function readBoolean() {
-           return Boolean(this.readVarint());
-         },
-         readString: function readString() {
-           var end = this.readVarint() + this.pos;
-           var pos = this.pos;
-           this.pos = end;
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.almost_junction.highway-highway.reference'));
+           }
 
-           if (end - pos >= TEXT_DECODER_MIN_LENGTH && utf8TextDecoder) {
-             // longer strings are fast with the built-in browser TextDecoder API
-             return readUtf8TextDecoder(this.buf, pos, end);
-           } // short strings are fast with our custom implementation
+           function isExtendableCandidate(node, way) {
+             // can not accurately test vertices on tiles not downloaded from osm - #5938
+             var osm = services.osm;
 
+             if (osm && !osm.isDataLoaded(node.loc)) {
+               return false;
+             }
 
-           return readUtf8(this.buf, pos, end);
-         },
-         readBytes: function readBytes() {
-           var end = this.readVarint() + this.pos,
-               buffer = this.buf.subarray(this.pos, end);
-           this.pos = end;
-           return buffer;
-         },
-         // verbose for performance reasons; doesn't affect gzipped size
-         readPackedVarint: function readPackedVarint(arr, isSigned) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readVarint(isSigned));
-           var end = readPackedEnd(this);
-           arr = arr || [];
+             if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
+               return false;
+             }
 
-           while (this.pos < end) {
-             arr.push(this.readVarint(isSigned));
-           }
+             var occurrences = 0;
 
-           return arr;
-         },
-         readPackedSVarint: function readPackedSVarint(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readSVarint());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+             for (var index in way.nodes) {
+               if (way.nodes[index] === node.id) {
+                 occurrences += 1;
 
-           while (this.pos < end) {
-             arr.push(this.readSVarint());
+                 if (occurrences > 1) {
+                   return false;
+                 }
+               }
+             }
+
+             return true;
            }
 
-           return arr;
-         },
-         readPackedBoolean: function readPackedBoolean(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readBoolean());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+           function findConnectableEndNodesByExtension(way) {
+             var results = [];
+             if (way.isClosed()) return results;
+             var testNodes;
+             var indices = [0, way.nodes.length - 1];
+             indices.forEach(function (nodeIndex) {
+               var nodeID = way.nodes[nodeIndex];
+               var node = graph.entity(nodeID);
+               if (!isExtendableCandidate(node, way)) return;
+               var connectionInfo = canConnectByExtend(way, nodeIndex);
+               if (!connectionInfo) return;
+               testNodes = graph.childNodes(way).slice(); // shallow copy
 
-           while (this.pos < end) {
-             arr.push(this.readBoolean());
-           }
+               testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
 
-           return arr;
-         },
-         readPackedFloat: function readPackedFloat(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readFloat());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+               if (geoHasSelfIntersections(testNodes, nodeID)) return;
+               results.push(connectionInfo);
+             });
+             return results;
+           }
 
-           while (this.pos < end) {
-             arr.push(this.readFloat());
+           function findNearbyEndNodes(node, way) {
+             return [way.nodes[0], way.nodes[way.nodes.length - 1]].map(function (d) {
+               return graph.entity(d);
+             }).filter(function (d) {
+               // Node cannot be near to itself, but other endnode of same way could be
+               return d.id !== node.id && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
+             });
            }
 
-           return arr;
-         },
-         readPackedDouble: function readPackedDouble(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readDouble());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+           function findSmallJoinAngle(midNode, tipNode, endNodes) {
+             // Both nodes could be close, so want to join whichever is closest to collinear
+             var joinTo;
+             var minAngle = Infinity; // Checks midNode -> tipNode -> endNode for collinearity
 
-           while (this.pos < end) {
-             arr.push(this.readDouble());
+             endNodes.forEach(function (endNode) {
+               var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
+               var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
+               var diff = Math.max(a1, a2) - Math.min(a1, a2);
+
+               if (diff < minAngle) {
+                 joinTo = endNode;
+                 minAngle = diff;
+               }
+             });
+             /* Threshold set by considering right angle triangle
+             based on node joining threshold and extension distance */
+
+             if (minAngle <= SIG_ANGLE_TH) return joinTo;
+             return null;
            }
 
-           return arr;
-         },
-         readPackedFixed32: function readPackedFixed32(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed32());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+           function hasTag(tags, key) {
+             return tags[key] !== undefined && tags[key] !== 'no';
+           }
 
-           while (this.pos < end) {
-             arr.push(this.readFixed32());
+           function canConnectWays(way, way2) {
+             // allow self-connections
+             if (way.id === way2.id) return true; // if one is bridge or tunnel, both must be bridge or tunnel
+
+             if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) && !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) return false;
+             if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) && !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) return false; // must have equivalent layers and levels
+
+             var layer1 = way.tags.layer || '0',
+                 layer2 = way2.tags.layer || '0';
+             if (layer1 !== layer2) return false;
+             var level1 = way.tags.level || '0',
+                 level2 = way2.tags.level || '0';
+             if (level1 !== level2) return false;
+             return true;
            }
 
-           return arr;
-         },
-         readPackedSFixed32: function readPackedSFixed32(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed32());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+           function canConnectByExtend(way, endNodeIdx) {
+             var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
 
-           while (this.pos < end) {
-             arr.push(this.readSFixed32());
+             var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
+
+             var tipNode = graph.entity(tipNid);
+             var midNode = graph.entity(midNid);
+             var lon = tipNode.loc[0];
+             var lat = tipNode.loc[1];
+             var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
+             var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
+             var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]); // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location
+
+             var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
+             var t = EXTEND_TH_METERS / edgeLen + 1.0;
+             var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t); // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways
+
+             var segmentInfos = tree.waySegments(queryExtent, graph);
+
+             for (var i = 0; i < segmentInfos.length; i++) {
+               var segmentInfo = segmentInfos[i];
+               var way2 = graph.entity(segmentInfo.wayId);
+               if (!isHighway(way2)) continue;
+               if (!canConnectWays(way, way2)) continue;
+               var nAid = segmentInfo.nodes[0],
+                   nBid = segmentInfo.nodes[1];
+               if (nAid === tipNid || nBid === tipNid) continue;
+               var nA = graph.entity(nAid),
+                   nB = graph.entity(nBid);
+               var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);
+
+               if (crossLoc) {
+                 return {
+                   mid: midNode,
+                   node: tipNode,
+                   wid: way2.id,
+                   edge: [nA.id, nB.id],
+                   cross_loc: crossLoc
+                 };
+               }
+             }
+
+             return null;
            }
+         };
 
-           return arr;
-         },
-         readPackedFixed64: function readPackedFixed64(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readFixed64());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+         validation.type = type;
+         return validation;
+       }
 
-           while (this.pos < end) {
-             arr.push(this.readFixed64());
+       function validationCloseNodes(context) {
+         var type = 'close_nodes';
+         var pointThresholdMeters = 0.2;
+
+         var validation = function validation(entity, graph) {
+           if (entity.type === 'node') {
+             return getIssuesForNode(entity);
+           } else if (entity.type === 'way') {
+             return getIssuesForWay(entity);
            }
 
-           return arr;
-         },
-         readPackedSFixed64: function readPackedSFixed64(arr) {
-           if (this.type !== Pbf.Bytes) return arr.push(this.readSFixed64());
-           var end = readPackedEnd(this);
-           arr = arr || [];
+           return [];
 
-           while (this.pos < end) {
-             arr.push(this.readSFixed64());
+           function getIssuesForNode(node) {
+             var parentWays = graph.parentWays(node);
+
+             if (parentWays.length) {
+               return getIssuesForVertex(node, parentWays);
+             } else {
+               return getIssuesForDetachedPoint(node);
+             }
            }
 
-           return arr;
-         },
-         skip: function skip(val) {
-           var type = val & 0x7;
-           if (type === Pbf.Varint) while (this.buf[this.pos++] > 0x7f) {} else if (type === Pbf.Bytes) this.pos = this.readVarint() + this.pos;else if (type === Pbf.Fixed32) this.pos += 4;else if (type === Pbf.Fixed64) this.pos += 8;else throw new Error('Unimplemented type: ' + type);
-         },
-         // === WRITING =================================================================
-         writeTag: function writeTag(tag, type) {
-           this.writeVarint(tag << 3 | type);
-         },
-         realloc: function realloc(min) {
-           var length = this.length || 16;
+           function wayTypeFor(way) {
+             if (way.tags.boundary && way.tags.boundary !== 'no') return 'boundary';
+             if (way.tags.indoor && way.tags.indoor !== 'no') return 'indoor';
+             if (way.tags.building && way.tags.building !== 'no' || way.tags['building:part'] && way.tags['building:part'] !== 'no') return 'building';
+             if (osmPathHighwayTagValues[way.tags.highway]) return 'path';
+             var parentRelations = graph.parentRelations(way);
 
-           while (length < this.pos + min) {
-             length *= 2;
+             for (var i in parentRelations) {
+               var relation = parentRelations[i];
+               if (relation.tags.type === 'boundary') return 'boundary';
+
+               if (relation.isMultipolygon()) {
+                 if (relation.tags.indoor && relation.tags.indoor !== 'no') return 'indoor';
+                 if (relation.tags.building && relation.tags.building !== 'no' || relation.tags['building:part'] && relation.tags['building:part'] !== 'no') return 'building';
+               }
+             }
+
+             return 'other';
            }
 
-           if (length !== this.length) {
-             var buf = new Uint8Array(length);
-             buf.set(this.buf);
-             this.buf = buf;
-             this.length = length;
+           function shouldCheckWay(way) {
+             // don't flag issues where merging would create degenerate ways
+             if (way.nodes.length <= 2 || way.isClosed() && way.nodes.length <= 4) return false;
+             var bbox = way.extent(graph).bbox();
+             var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]); // don't flag close nodes in very small ways
+
+             if (hypotenuseMeters < 1.5) return false;
+             return true;
            }
-         },
-         finish: function finish() {
-           this.length = this.pos;
-           this.pos = 0;
-           return this.buf.subarray(0, this.length);
-         },
-         writeFixed32: function writeFixed32(val) {
-           this.realloc(4);
-           writeInt32(this.buf, val, this.pos);
-           this.pos += 4;
-         },
-         writeSFixed32: function writeSFixed32(val) {
-           this.realloc(4);
-           writeInt32(this.buf, val, this.pos);
-           this.pos += 4;
-         },
-         writeFixed64: function writeFixed64(val) {
-           this.realloc(8);
-           writeInt32(this.buf, val & -1, this.pos);
-           writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-           this.pos += 8;
-         },
-         writeSFixed64: function writeSFixed64(val) {
-           this.realloc(8);
-           writeInt32(this.buf, val & -1, this.pos);
-           writeInt32(this.buf, Math.floor(val * SHIFT_RIGHT_32), this.pos + 4);
-           this.pos += 8;
-         },
-         writeVarint: function writeVarint(val) {
-           val = +val || 0;
 
-           if (val > 0xfffffff || val < 0) {
-             writeBigVarint(val, this);
-             return;
+           function getIssuesForWay(way) {
+             if (!shouldCheckWay(way)) return [];
+             var issues = [],
+                 nodes = graph.childNodes(way);
+
+             for (var i = 0; i < nodes.length - 1; i++) {
+               var node1 = nodes[i];
+               var node2 = nodes[i + 1];
+               var issue = getWayIssueIfAny(node1, node2, way);
+               if (issue) issues.push(issue);
+             }
+
+             return issues;
            }
 
-           this.realloc(4);
-           this.buf[this.pos++] = val & 0x7f | (val > 0x7f ? 0x80 : 0);
-           if (val <= 0x7f) return;
-           this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
-           if (val <= 0x7f) return;
-           this.buf[this.pos++] = (val >>>= 7) & 0x7f | (val > 0x7f ? 0x80 : 0);
-           if (val <= 0x7f) return;
-           this.buf[this.pos++] = val >>> 7 & 0x7f;
-         },
-         writeSVarint: function writeSVarint(val) {
-           this.writeVarint(val < 0 ? -val * 2 - 1 : val * 2);
-         },
-         writeBoolean: function writeBoolean(val) {
-           this.writeVarint(Boolean(val));
-         },
-         writeString: function writeString(str) {
-           str = String(str);
-           this.realloc(str.length * 4);
-           this.pos++; // reserve 1 byte for short string length
+           function getIssuesForVertex(node, parentWays) {
+             var issues = [];
 
-           var startPos = this.pos; // write the string directly to the buffer and see how much was written
+             function checkForCloseness(node1, node2, way) {
+               var issue = getWayIssueIfAny(node1, node2, way);
+               if (issue) issues.push(issue);
+             }
 
-           this.pos = writeUtf8(this.buf, str, this.pos);
-           var len = this.pos - startPos;
-           if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
+             for (var i = 0; i < parentWays.length; i++) {
+               var parentWay = parentWays[i];
+               if (!shouldCheckWay(parentWay)) continue;
+               var lastIndex = parentWay.nodes.length - 1;
 
-           this.pos = startPos - 1;
-           this.writeVarint(len);
-           this.pos += len;
-         },
-         writeFloat: function writeFloat(val) {
-           this.realloc(4);
-           ieee754$1.write(this.buf, val, this.pos, true, 23, 4);
-           this.pos += 4;
-         },
-         writeDouble: function writeDouble(val) {
-           this.realloc(8);
-           ieee754$1.write(this.buf, val, this.pos, true, 52, 8);
-           this.pos += 8;
-         },
-         writeBytes: function writeBytes(buffer) {
-           var len = buffer.length;
-           this.writeVarint(len);
-           this.realloc(len);
+               for (var j = 0; j < parentWay.nodes.length; j++) {
+                 if (j !== 0) {
+                   if (parentWay.nodes[j - 1] === node.id) {
+                     checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
+                   }
+                 }
 
-           for (var i = 0; i < len; i++) {
-             this.buf[this.pos++] = buffer[i];
+                 if (j !== lastIndex) {
+                   if (parentWay.nodes[j + 1] === node.id) {
+                     checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
+                   }
+                 }
+               }
+             }
+
+             return issues;
            }
-         },
-         writeRawMessage: function writeRawMessage(fn, obj) {
-           this.pos++; // reserve 1 byte for short message length
-           // write the message directly to the buffer and see how much was written
 
-           var startPos = this.pos;
-           fn(obj, this);
-           var len = this.pos - startPos;
-           if (len >= 0x80) makeRoomForExtraLength(startPos, len, this); // finally, write the message length in the reserved place and restore the position
+           function thresholdMetersForWay(way) {
+             if (!shouldCheckWay(way)) return 0;
+             var wayType = wayTypeFor(way); // don't flag boundaries since they might be highly detailed and can't be easily verified
 
-           this.pos = startPos - 1;
-           this.writeVarint(len);
-           this.pos += len;
-         },
-         writeMessage: function writeMessage(tag, fn, obj) {
-           this.writeTag(tag, Pbf.Bytes);
-           this.writeRawMessage(fn, obj);
-         },
-         writePackedVarint: function writePackedVarint(tag, arr) {
-           if (arr.length) this.writeMessage(tag, _writePackedVarint, arr);
-         },
-         writePackedSVarint: function writePackedSVarint(tag, arr) {
-           if (arr.length) this.writeMessage(tag, _writePackedSVarint, arr);
-         },
-         writePackedBoolean: function writePackedBoolean(tag, arr) {
-           if (arr.length) this.writeMessage(tag, _writePackedBoolean, arr);
-         },
-         writePackedFloat: function writePackedFloat(tag, arr) {
-           if (arr.length) this.writeMessage(tag, _writePackedFloat, arr);
-         },
-         writePackedDouble: function writePackedDouble(tag, arr) {
-           if (arr.length) this.writeMessage(tag, _writePackedDouble, arr);
-         },
-         writePackedFixed32: function writePackedFixed32(tag, arr) {
-           if (arr.length) this.writeMessage(tag, _writePackedFixed, arr);
-         },
-         writePackedSFixed32: function writePackedSFixed32(tag, arr) {
-           if (arr.length) this.writeMessage(tag, _writePackedSFixed, arr);
-         },
-         writePackedFixed64: function writePackedFixed64(tag, arr) {
-           if (arr.length) this.writeMessage(tag, _writePackedFixed2, arr);
-         },
-         writePackedSFixed64: function writePackedSFixed64(tag, arr) {
-           if (arr.length) this.writeMessage(tag, _writePackedSFixed2, arr);
-         },
-         writeBytesField: function writeBytesField(tag, buffer) {
-           this.writeTag(tag, Pbf.Bytes);
-           this.writeBytes(buffer);
-         },
-         writeFixed32Field: function writeFixed32Field(tag, val) {
-           this.writeTag(tag, Pbf.Fixed32);
-           this.writeFixed32(val);
-         },
-         writeSFixed32Field: function writeSFixed32Field(tag, val) {
-           this.writeTag(tag, Pbf.Fixed32);
-           this.writeSFixed32(val);
-         },
-         writeFixed64Field: function writeFixed64Field(tag, val) {
-           this.writeTag(tag, Pbf.Fixed64);
-           this.writeFixed64(val);
-         },
-         writeSFixed64Field: function writeSFixed64Field(tag, val) {
-           this.writeTag(tag, Pbf.Fixed64);
-           this.writeSFixed64(val);
-         },
-         writeVarintField: function writeVarintField(tag, val) {
-           this.writeTag(tag, Pbf.Varint);
-           this.writeVarint(val);
-         },
-         writeSVarintField: function writeSVarintField(tag, val) {
-           this.writeTag(tag, Pbf.Varint);
-           this.writeSVarint(val);
-         },
-         writeStringField: function writeStringField(tag, str) {
-           this.writeTag(tag, Pbf.Bytes);
-           this.writeString(str);
-         },
-         writeFloatField: function writeFloatField(tag, val) {
-           this.writeTag(tag, Pbf.Fixed32);
-           this.writeFloat(val);
-         },
-         writeDoubleField: function writeDoubleField(tag, val) {
-           this.writeTag(tag, Pbf.Fixed64);
-           this.writeDouble(val);
-         },
-         writeBooleanField: function writeBooleanField(tag, val) {
-           this.writeVarintField(tag, Boolean(val));
-         }
-       };
+             if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
 
-       function readVarintRemainder(l, s, p) {
-         var buf = p.buf,
-             h,
-             b;
-         b = buf[p.pos++];
-         h = (b & 0x70) >> 4;
-         if (b < 0x80) return toNum(l, h, s);
-         b = buf[p.pos++];
-         h |= (b & 0x7f) << 3;
-         if (b < 0x80) return toNum(l, h, s);
-         b = buf[p.pos++];
-         h |= (b & 0x7f) << 10;
-         if (b < 0x80) return toNum(l, h, s);
-         b = buf[p.pos++];
-         h |= (b & 0x7f) << 17;
-         if (b < 0x80) return toNum(l, h, s);
-         b = buf[p.pos++];
-         h |= (b & 0x7f) << 24;
-         if (b < 0x80) return toNum(l, h, s);
-         b = buf[p.pos++];
-         h |= (b & 0x01) << 31;
-         if (b < 0x80) return toNum(l, h, s);
-         throw new Error('Expected varint not more than 10 bytes');
-       }
+             if (wayType === 'indoor') return 0.01;
+             if (wayType === 'building') return 0.05;
+             if (wayType === 'path') return 0.1;
+             return 0.2;
+           }
+
+           function getIssuesForDetachedPoint(node) {
+             var issues = [];
+             var lon = node.loc[0];
+             var lat = node.loc[1];
+             var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
+             var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
+             var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]);
+             var intersected = context.history().tree().intersects(queryExtent, graph);
 
-       function readPackedEnd(pbf) {
-         return pbf.type === Pbf.Bytes ? pbf.readVarint() + pbf.pos : pbf.pos + 1;
-       }
+             for (var j = 0; j < intersected.length; j++) {
+               var nearby = intersected[j];
+               if (nearby.id === node.id) continue;
+               if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') continue;
 
-       function toNum(low, high, isSigned) {
-         if (isSigned) {
-           return high * 0x100000000 + (low >>> 0);
-         }
+               if (nearby.loc === node.loc || geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
+                 // allow very close points if tags indicate the z-axis might vary
+                 var zAxisKeys = {
+                   layer: true,
+                   level: true,
+                   'addr:housenumber': true,
+                   'addr:unit': true
+                 };
+                 var zAxisDifferentiates = false;
 
-         return (high >>> 0) * 0x100000000 + (low >>> 0);
-       }
+                 for (var key in zAxisKeys) {
+                   var nodeValue = node.tags[key] || '0';
+                   var nearbyValue = nearby.tags[key] || '0';
 
-       function writeBigVarint(val, pbf) {
-         var low, high;
+                   if (nodeValue !== nearbyValue) {
+                     zAxisDifferentiates = true;
+                     break;
+                   }
+                 }
 
-         if (val >= 0) {
-           low = val % 0x100000000 | 0;
-           high = val / 0x100000000 | 0;
-         } else {
-           low = ~(-val % 0x100000000);
-           high = ~(-val / 0x100000000);
+                 if (zAxisDifferentiates) continue;
+                 issues.push(new validationIssue({
+                   type: type,
+                   subtype: 'detached',
+                   severity: 'warning',
+                   message: function message(context) {
+                     var entity = context.hasEntity(this.entityIds[0]),
+                         entity2 = context.hasEntity(this.entityIds[1]);
+                     return entity && entity2 ? _t.html('issues.close_nodes.detached.message', {
+                       feature: utilDisplayLabel(entity, context.graph()),
+                       feature2: utilDisplayLabel(entity2, context.graph())
+                     }) : '';
+                   },
+                   reference: showReference,
+                   entityIds: [node.id, nearby.id],
+                   dynamicFixes: function dynamicFixes() {
+                     return [new validationIssueFix({
+                       icon: 'iD-operation-disconnect',
+                       title: _t.html('issues.fix.move_points_apart.title')
+                     }), new validationIssueFix({
+                       icon: 'iD-icon-layers',
+                       title: _t.html('issues.fix.use_different_layers_or_levels.title')
+                     })];
+                   }
+                 }));
+               }
+             }
 
-           if (low ^ 0xffffffff) {
-             low = low + 1 | 0;
-           } else {
-             low = 0;
-             high = high + 1 | 0;
+             return issues;
+
+             function showReference(selection) {
+               var referenceText = _t('issues.close_nodes.detached.reference');
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+             }
            }
-         }
 
-         if (val >= 0x10000000000000000 || val < -0x10000000000000000) {
-           throw new Error('Given varint doesn\'t fit into 10 bytes');
-         }
+           function getWayIssueIfAny(node1, node2, way) {
+             if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
+               return null;
+             }
 
-         pbf.realloc(10);
-         writeBigVarintLow(low, high, pbf);
-         writeBigVarintHigh(high, pbf);
-       }
+             if (node1.loc !== node2.loc) {
+               var parentWays1 = graph.parentWays(node1);
+               var parentWays2 = new Set(graph.parentWays(node2));
+               var sharedWays = parentWays1.filter(function (parentWay) {
+                 return parentWays2.has(parentWay);
+               });
+               var thresholds = sharedWays.map(function (parentWay) {
+                 return thresholdMetersForWay(parentWay);
+               });
+               var threshold = Math.min.apply(Math, _toConsumableArray(thresholds));
+               var distance = geoSphericalDistance(node1.loc, node2.loc);
+               if (distance > threshold) return null;
+             }
 
-       function writeBigVarintLow(low, high, pbf) {
-         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
-         low >>>= 7;
-         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
-         low >>>= 7;
-         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
-         low >>>= 7;
-         pbf.buf[pbf.pos++] = low & 0x7f | 0x80;
-         low >>>= 7;
-         pbf.buf[pbf.pos] = low & 0x7f;
-       }
+             return new validationIssue({
+               type: type,
+               subtype: 'vertices',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.close_nodes.message', {
+                   way: utilDisplayLabel(entity, context.graph())
+                 }) : '';
+               },
+               reference: showReference,
+               entityIds: [way.id, node1.id, node2.id],
+               loc: node1.loc,
+               dynamicFixes: function dynamicFixes() {
+                 return [new validationIssueFix({
+                   icon: 'iD-icon-plus',
+                   title: _t.html('issues.fix.merge_points.title'),
+                   onClick: function onClick(context) {
+                     var entityIds = this.issue.entityIds;
+                     var action = actionMergeNodes([entityIds[1], entityIds[2]]);
+                     context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
+                   }
+                 }), new validationIssueFix({
+                   icon: 'iD-operation-disconnect',
+                   title: _t.html('issues.fix.move_points_apart.title')
+                 })];
+               }
+             });
 
-       function writeBigVarintHigh(high, pbf) {
-         var lsb = (high & 0x07) << 4;
-         pbf.buf[pbf.pos++] |= lsb | ((high >>>= 3) ? 0x80 : 0);
-         if (!high) return;
-         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
-         if (!high) return;
-         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
-         if (!high) return;
-         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
-         if (!high) return;
-         pbf.buf[pbf.pos++] = high & 0x7f | ((high >>>= 7) ? 0x80 : 0);
-         if (!high) return;
-         pbf.buf[pbf.pos++] = high & 0x7f;
+             function showReference(selection) {
+               var referenceText = _t('issues.close_nodes.reference');
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+             }
+           }
+         };
+
+         validation.type = type;
+         return validation;
        }
 
-       function makeRoomForExtraLength(startPos, len, pbf) {
-         var extraLen = len <= 0x3fff ? 1 : len <= 0x1fffff ? 2 : len <= 0xfffffff ? 3 : Math.floor(Math.log(len) / (Math.LN2 * 7)); // if 1 byte isn't enough for encoding message length, shift the data to the right
+       function validationCrossingWays(context) {
+         var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
 
-         pbf.realloc(extraLen);
+         function getFeatureWithFeatureTypeTagsForWay(way, graph) {
+           if (getFeatureType(way, graph) === null) {
+             // if the way doesn't match a feature type, check its parent relations
+             var parentRels = graph.parentRelations(way);
 
-         for (var i = pbf.pos - 1; i >= startPos; i--) {
-           pbf.buf[i + extraLen] = pbf.buf[i];
-         }
-       }
+             for (var i = 0; i < parentRels.length; i++) {
+               var rel = parentRels[i];
 
-       function _writePackedVarint(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeVarint(arr[i]);
-         }
-       }
+               if (getFeatureType(rel, graph) !== null) {
+                 return rel;
+               }
+             }
+           }
 
-       function _writePackedSVarint(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeSVarint(arr[i]);
+           return way;
          }
-       }
 
-       function _writePackedFloat(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeFloat(arr[i]);
+         function hasTag(tags, key) {
+           return tags[key] !== undefined && tags[key] !== 'no';
          }
-       }
 
-       function _writePackedDouble(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeDouble(arr[i]);
+         function taggedAsIndoor(tags) {
+           return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
          }
-       }
 
-       function _writePackedBoolean(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeBoolean(arr[i]);
+         function allowsBridge(featureType) {
+           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
          }
-       }
 
-       function _writePackedFixed(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeFixed32(arr[i]);
-         }
-       }
+         function allowsTunnel(featureType) {
+           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
+         } // discard
 
-       function _writePackedSFixed(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeSFixed32(arr[i]);
-         }
-       }
 
-       function _writePackedFixed2(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeFixed64(arr[i]);
-         }
-       }
+         var ignoredBuildings = {
+           demolished: true,
+           dismantled: true,
+           proposed: true,
+           razed: true
+         };
 
-       function _writePackedSFixed2(arr, pbf) {
-         for (var i = 0; i < arr.length; i++) {
-           pbf.writeSFixed64(arr[i]);
+         function getFeatureType(entity, graph) {
+           var geometry = entity.geometry(graph);
+           if (geometry !== 'line' && geometry !== 'area') return null;
+           var tags = entity.tags;
+           if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) return 'building';
+           if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) return 'highway'; // don't check railway or waterway areas
+
+           if (geometry !== 'line') return null;
+           if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) return 'railway';
+           if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) return 'waterway';
+           return null;
          }
-       } // Buffer code below from https://github.com/feross/buffer, MIT-licensed
 
+         function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
+           // assume 0 by default
+           var level1 = tags1.level || '0';
+           var level2 = tags2.level || '0';
+
+           if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
+             // assume features don't interact if they're indoor on different levels
+             return true;
+           } // assume 0 by default; don't use way.layer() since we account for structures here
 
-       function readUInt32(buf, pos) {
-         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + buf[pos + 3] * 0x1000000;
-       }
 
-       function writeInt32(buf, val, pos) {
-         buf[pos] = val;
-         buf[pos + 1] = val >>> 8;
-         buf[pos + 2] = val >>> 16;
-         buf[pos + 3] = val >>> 24;
-       }
+           var layer1 = tags1.layer || '0';
+           var layer2 = tags2.layer || '0';
 
-       function readInt32(buf, pos) {
-         return (buf[pos] | buf[pos + 1] << 8 | buf[pos + 2] << 16) + (buf[pos + 3] << 24);
-       }
+           if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
+             if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) return true;
+             if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) return true; // crossing bridges must use different layers
 
-       function readUtf8(buf, pos, end) {
-         var str = '';
-         var i = pos;
+             if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) return true;
+           } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) return true;else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) return true;
 
-         while (i < end) {
-           var b0 = buf[i];
-           var c = null; // codepoint
+           if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
+             if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) return true;
+             if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) return true; // crossing tunnels must use different layers
 
-           var bytesPerSequence = b0 > 0xEF ? 4 : b0 > 0xDF ? 3 : b0 > 0xBF ? 2 : 1;
-           if (i + bytesPerSequence > end) break;
-           var b1, b2, b3;
+             if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) return true;
+           } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) return true;else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) return true; // don't flag crossing waterways and pier/highways
 
-           if (bytesPerSequence === 1) {
-             if (b0 < 0x80) {
-               c = b0;
-             }
-           } else if (bytesPerSequence === 2) {
-             b1 = buf[i + 1];
 
-             if ((b1 & 0xC0) === 0x80) {
-               c = (b0 & 0x1F) << 0x6 | b1 & 0x3F;
+           if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
+           if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
 
-               if (c <= 0x7F) {
-                 c = null;
+           if (featureType1 === 'building' || featureType2 === 'building') {
+             // for building crossings, different layers are enough
+             if (layer1 !== layer2) return true;
+           }
+
+           return false;
+         } // highway values for which we shouldn't recommend connecting to waterways
+
+
+         var highwaysDisallowingFords = {
+           motorway: true,
+           motorway_link: true,
+           trunk: true,
+           trunk_link: true,
+           primary: true,
+           primary_link: true,
+           secondary: true,
+           secondary_link: true
+         };
+         var nonCrossingHighways = {
+           track: true
+         };
+
+         function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
+           var featureType1 = getFeatureType(entity1, graph);
+           var featureType2 = getFeatureType(entity2, graph);
+           var geometry1 = entity1.geometry(graph);
+           var geometry2 = entity2.geometry(graph);
+           var bothLines = geometry1 === 'line' && geometry2 === 'line';
+
+           if (featureType1 === featureType2) {
+             if (featureType1 === 'highway') {
+               var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
+               var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
+
+               if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
+                 // one feature is a path but not both
+                 var roadFeature = entity1IsPath ? entity2 : entity1;
+
+                 if (nonCrossingHighways[roadFeature.tags.highway]) {
+                   // don't mark path connections with certain roads as crossings
+                   return {};
+                 }
+
+                 var pathFeature = entity1IsPath ? entity1 : entity2;
+
+                 if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
+                   // if the path is a crossing, match the crossing type
+                   return bothLines ? {
+                     highway: 'crossing',
+                     crossing: pathFeature.tags.crossing
+                   } : {};
+                 } // don't add a `crossing` subtag to ambiguous crossings
+
+
+                 return bothLines ? {
+                   highway: 'crossing'
+                 } : {};
                }
+
+               return {};
              }
-           } else if (bytesPerSequence === 3) {
-             b1 = buf[i + 1];
-             b2 = buf[i + 2];
 
-             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80) {
-               c = (b0 & 0xF) << 0xC | (b1 & 0x3F) << 0x6 | b2 & 0x3F;
+             if (featureType1 === 'waterway') return {};
+             if (featureType1 === 'railway') return {};
+           } else {
+             var featureTypes = [featureType1, featureType2];
 
-               if (c <= 0x7FF || c >= 0xD800 && c <= 0xDFFF) {
-                 c = null;
+             if (featureTypes.indexOf('highway') !== -1) {
+               if (featureTypes.indexOf('railway') !== -1) {
+                 if (!bothLines) return {};
+                 var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
+
+                 if (osmPathHighwayTagValues[entity1.tags.highway] || osmPathHighwayTagValues[entity2.tags.highway]) {
+                   // path-tram connections use this tag
+                   if (isTram) return {
+                     railway: 'tram_crossing'
+                   }; // other path-rail connections use this tag
+
+                   return {
+                     railway: 'crossing'
+                   };
+                 } else {
+                   // path-tram connections use this tag
+                   if (isTram) return {
+                     railway: 'tram_level_crossing'
+                   }; // other road-rail connections use this tag
+
+                   return {
+                     railway: 'level_crossing'
+                   };
+                 }
                }
-             }
-           } else if (bytesPerSequence === 4) {
-             b1 = buf[i + 1];
-             b2 = buf[i + 2];
-             b3 = buf[i + 3];
 
-             if ((b1 & 0xC0) === 0x80 && (b2 & 0xC0) === 0x80 && (b3 & 0xC0) === 0x80) {
-               c = (b0 & 0xF) << 0x12 | (b1 & 0x3F) << 0xC | (b2 & 0x3F) << 0x6 | b3 & 0x3F;
+               if (featureTypes.indexOf('waterway') !== -1) {
+                 // do not allow fords on structures
+                 if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) return null;
+                 if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) return null;
 
-               if (c <= 0xFFFF || c >= 0x110000) {
-                 c = null;
+                 if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
+                   // do not allow fords on major highways
+                   return null;
+                 }
+
+                 return bothLines ? {
+                   ford: 'yes'
+                 } : {};
                }
              }
            }
 
-           if (c === null) {
-             c = 0xFFFD;
-             bytesPerSequence = 1;
-           } else if (c > 0xFFFF) {
-             c -= 0x10000;
-             str += String.fromCharCode(c >>> 10 & 0x3FF | 0xD800);
-             c = 0xDC00 | c & 0x3FF;
-           }
-
-           str += String.fromCharCode(c);
-           i += bytesPerSequence;
+           return null;
          }
 
-         return str;
-       }
+         function findCrossingsByWay(way1, graph, tree) {
+           var edgeCrossInfos = [];
+           if (way1.type !== 'way') return edgeCrossInfos;
+           var taggedFeature1 = getFeatureWithFeatureTypeTagsForWay(way1, graph);
+           var way1FeatureType = getFeatureType(taggedFeature1, graph);
+           if (way1FeatureType === null) return edgeCrossInfos;
+           var checkedSingleCrossingWays = {}; // declare vars ahead of time to reduce garbage collection
 
-       function readUtf8TextDecoder(buf, pos, end) {
-         return utf8TextDecoder.decode(buf.subarray(pos, end));
-       }
+           var i, j;
+           var extent;
+           var n1, n2, nA, nB, nAId, nBId;
+           var segment1, segment2;
+           var oneOnly;
+           var segmentInfos, segment2Info, way2, taggedFeature2, way2FeatureType;
+           var way1Nodes = graph.childNodes(way1);
+           var comparedWays = {};
 
-       function writeUtf8(buf, str, pos) {
-         for (var i = 0, c, lead; i < str.length; i++) {
-           c = str.charCodeAt(i); // code point
+           for (i = 0; i < way1Nodes.length - 1; i++) {
+             n1 = way1Nodes[i];
+             n2 = way1Nodes[i + 1];
+             extent = geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]); // Optimize by only checking overlapping segments, not every segment
+             // of overlapping ways
 
-           if (c > 0xD7FF && c < 0xE000) {
-             if (lead) {
-               if (c < 0xDC00) {
-                 buf[pos++] = 0xEF;
-                 buf[pos++] = 0xBF;
-                 buf[pos++] = 0xBD;
-                 lead = c;
+             segmentInfos = tree.waySegments(extent, graph);
+
+             for (j = 0; j < segmentInfos.length; j++) {
+               segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
+
+               if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
+
+               if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
+
+               comparedWays[segment2Info.wayId] = true;
+               way2 = graph.hasEntity(segment2Info.wayId);
+               if (!way2) continue;
+               taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
+
+               way2FeatureType = getFeatureType(taggedFeature2, graph);
+
+               if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
                  continue;
-               } else {
-                 c = lead - 0xD800 << 10 | c - 0xDC00 | 0x10000;
-                 lead = null;
-               }
-             } else {
-               if (c > 0xDBFF || i + 1 === str.length) {
-                 buf[pos++] = 0xEF;
-                 buf[pos++] = 0xBF;
-                 buf[pos++] = 0xBD;
-               } else {
-                 lead = c;
-               }
+               } // create only one issue for building crossings
 
-               continue;
-             }
-           } else if (lead) {
-             buf[pos++] = 0xEF;
-             buf[pos++] = 0xBF;
-             buf[pos++] = 0xBD;
-             lead = null;
-           }
 
-           if (c < 0x80) {
-             buf[pos++] = c;
-           } else {
-             if (c < 0x800) {
-               buf[pos++] = c >> 0x6 | 0xC0;
-             } else {
-               if (c < 0x10000) {
-                 buf[pos++] = c >> 0xC | 0xE0;
-               } else {
-                 buf[pos++] = c >> 0x12 | 0xF0;
-                 buf[pos++] = c >> 0xC & 0x3F | 0x80;
+               oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
+               nAId = segment2Info.nodes[0];
+               nBId = segment2Info.nodes[1];
+
+               if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
+                 // n1 or n2 is a connection node; skip
+                 continue;
                }
 
-               buf[pos++] = c >> 0x6 & 0x3F | 0x80;
-             }
+               nA = graph.hasEntity(nAId);
+               if (!nA) continue;
+               nB = graph.hasEntity(nBId);
+               if (!nB) continue;
+               segment1 = [n1.loc, n2.loc];
+               segment2 = [nA.loc, nB.loc];
+               var point = geoLineIntersection(segment1, segment2);
 
-             buf[pos++] = c & 0x3F | 0x80;
+               if (point) {
+                 edgeCrossInfos.push({
+                   wayInfos: [{
+                     way: way1,
+                     featureType: way1FeatureType,
+                     edge: [n1.id, n2.id]
+                   }, {
+                     way: way2,
+                     featureType: way2FeatureType,
+                     edge: [nA.id, nB.id]
+                   }],
+                   crossPoint: point
+                 });
+
+                 if (oneOnly) {
+                   checkedSingleCrossingWays[way2.id] = true;
+                   break;
+                 }
+               }
+             }
            }
+
+           return edgeCrossInfos;
          }
 
-         return pos;
-       }
+         function waysToCheck(entity, graph) {
+           var featureType = getFeatureType(entity, graph);
+           if (!featureType) return [];
 
-       var pointGeometry = Point;
-       /**
-        * A standalone point geometry with useful accessor, comparison, and
-        * modification methods.
-        *
-        * @class Point
-        * @param {Number} x the x-coordinate. this could be longitude or screen
-        * pixels, or any other sort of unit.
-        * @param {Number} y the y-coordinate. this could be latitude or screen
-        * pixels, or any other sort of unit.
-        * @example
-        * var point = new Point(-77, 38);
-        */
+           if (entity.type === 'way') {
+             return [entity];
+           } else if (entity.type === 'relation') {
+             return entity.members.reduce(function (array, member) {
+               if (member.type === 'way' && ( // only look at geometry ways
+               !member.role || member.role === 'outer' || member.role === 'inner')) {
+                 var entity = graph.hasEntity(member.id); // don't add duplicates
 
-       function Point(x, y) {
-         this.x = x;
-         this.y = y;
-       }
+                 if (entity && array.indexOf(entity) === -1) {
+                   array.push(entity);
+                 }
+               }
 
-       Point.prototype = {
-         /**
-          * Clone this point, returning a new point that can be modified
-          * without affecting the old one.
-          * @return {Point} the clone
-          */
-         clone: function clone() {
-           return new Point(this.x, this.y);
-         },
+               return array;
+             }, []);
+           }
 
-         /**
-          * Add this point's x & y coordinates to another point,
-          * yielding a new point.
-          * @param {Point} p the other point
-          * @return {Point} output point
-          */
-         add: function add(p) {
-           return this.clone()._add(p);
-         },
+           return [];
+         }
 
-         /**
-          * Subtract this point's x & y coordinates to from point,
-          * yielding a new point.
-          * @param {Point} p the other point
-          * @return {Point} output point
-          */
-         sub: function sub(p) {
-           return this.clone()._sub(p);
-         },
+         var validation = function checkCrossingWays(entity, graph) {
+           var tree = context.history().tree();
+           var ways = waysToCheck(entity, graph);
+           var issues = []; // declare these here to reduce garbage collection
 
-         /**
-          * Multiply this point's x & y coordinates by point,
-          * yielding a new point.
-          * @param {Point} p the other point
-          * @return {Point} output point
-          */
-         multByPoint: function multByPoint(p) {
-           return this.clone()._multByPoint(p);
-         },
+           var wayIndex, crossingIndex, crossings;
 
-         /**
-          * Divide this point's x & y coordinates by point,
-          * yielding a new point.
-          * @param {Point} p the other point
-          * @return {Point} output point
-          */
-         divByPoint: function divByPoint(p) {
-           return this.clone()._divByPoint(p);
-         },
+           for (wayIndex in ways) {
+             crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
 
-         /**
-          * Multiply this point's x & y coordinates by a factor,
-          * yielding a new point.
-          * @param {Point} k factor
-          * @return {Point} output point
-          */
-         mult: function mult(k) {
-           return this.clone()._mult(k);
-         },
+             for (crossingIndex in crossings) {
+               issues.push(createIssue(crossings[crossingIndex], graph));
+             }
+           }
 
-         /**
-          * Divide this point's x & y coordinates by a factor,
-          * yielding a new point.
-          * @param {Point} k factor
-          * @return {Point} output point
-          */
-         div: function div(k) {
-           return this.clone()._div(k);
-         },
+           return issues;
+         };
 
-         /**
-          * Rotate this point around the 0, 0 origin by an angle a,
-          * given in radians
-          * @param {Number} a angle to rotate around, in radians
-          * @return {Point} output point
-          */
-         rotate: function rotate(a) {
-           return this.clone()._rotate(a);
-         },
+         function createIssue(crossing, graph) {
+           // use the entities with the tags that define the feature type
+           crossing.wayInfos.sort(function (way1Info, way2Info) {
+             var type1 = way1Info.featureType;
+             var type2 = way2Info.featureType;
 
-         /**
-          * Rotate this point around p point by an angle a,
-          * given in radians
-          * @param {Number} a angle to rotate around, in radians
-          * @param {Point} p Point to rotate around
-          * @return {Point} output point
-          */
-         rotateAround: function rotateAround(a, p) {
-           return this.clone()._rotateAround(a, p);
-         },
+             if (type1 === type2) {
+               return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
+             } else if (type1 === 'waterway') {
+               return true;
+             } else if (type2 === 'waterway') {
+               return false;
+             }
 
-         /**
-          * Multiply this point by a 4x1 transformation matrix
-          * @param {Array<Number>} m transformation matrix
-          * @return {Point} output point
-          */
-         matMult: function matMult(m) {
-           return this.clone()._matMult(m);
-         },
+             return type1 < type2;
+           });
+           var entities = crossing.wayInfos.map(function (wayInfo) {
+             return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
+           });
+           var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
+           var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
+           var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
+           var featureType1 = crossing.wayInfos[0].featureType;
+           var featureType2 = crossing.wayInfos[1].featureType;
+           var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
+           var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') && allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
+           var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') && allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
+           var subtype = [featureType1, featureType2].sort().join('-');
+           var crossingTypeID = subtype;
 
-         /**
-          * Calculate this point but as a unit vector from 0, 0, meaning
-          * that the distance from the resulting point to the 0, 0
-          * coordinate will be equal to 1 and the angle from the resulting
-          * point to the 0, 0 coordinate will be the same as before.
-          * @return {Point} unit vector point
-          */
-         unit: function unit() {
-           return this.clone()._unit();
-         },
+           if (isCrossingIndoors) {
+             crossingTypeID = 'indoor-indoor';
+           } else if (isCrossingTunnels) {
+             crossingTypeID = 'tunnel-tunnel';
+           } else if (isCrossingBridges) {
+             crossingTypeID = 'bridge-bridge';
+           }
 
-         /**
-          * Compute a perpendicular point, where the new y coordinate
-          * is the old x coordinate and the new x coordinate is the old y
-          * coordinate multiplied by -1
-          * @return {Point} perpendicular point
-          */
-         perp: function perp() {
-           return this.clone()._perp();
-         },
+           if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
+             crossingTypeID += '_connectable';
+           } // Differentiate based on the loc rounded to 4 digits, since two ways can cross multiple times.
 
-         /**
-          * Return a version of this point with the x & y coordinates
-          * rounded to integers.
-          * @return {Point} rounded point
-          */
-         round: function round() {
-           return this.clone()._round();
-         },
 
-         /**
-          * Return the magitude of this point: this is the Euclidean
-          * distance from the 0, 0 coordinate to this point's x and y
-          * coordinates.
-          * @return {Number} magnitude
-          */
-         mag: function mag() {
-           return Math.sqrt(this.x * this.x + this.y * this.y);
-         },
+           var uniqueID = crossing.crossPoint[0].toFixed(4) + ',' + crossing.crossPoint[1].toFixed(4);
+           return new validationIssue({
+             type: type,
+             subtype: subtype,
+             severity: 'warning',
+             message: function message(context) {
+               var graph = context.graph();
+               var entity1 = graph.hasEntity(this.entityIds[0]),
+                   entity2 = graph.hasEntity(this.entityIds[1]);
+               return entity1 && entity2 ? _t.html('issues.crossing_ways.message', {
+                 feature: utilDisplayLabel(entity1, graph),
+                 feature2: utilDisplayLabel(entity2, graph)
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: entities.map(function (entity) {
+               return entity.id;
+             }),
+             data: {
+               edges: edges,
+               featureTypes: featureTypes,
+               connectionTags: connectionTags
+             },
+             hash: uniqueID,
+             loc: crossing.crossPoint,
+             dynamicFixes: function dynamicFixes(context) {
+               var mode = context.mode();
+               if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) return [];
+               var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
+               var selectedFeatureType = this.data.featureTypes[selectedIndex];
+               var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
+               var fixes = [];
 
-         /**
-          * Judge whether this point is equal to another point, returning
-          * true or false.
-          * @param {Point} other the other point
-          * @return {boolean} whether the points are equal
-          */
-         equals: function equals(other) {
-           return this.x === other.x && this.y === other.y;
-         },
+               if (connectionTags) {
+                 fixes.push(makeConnectWaysFix(this.data.connectionTags));
+               }
 
-         /**
-          * Calculate the distance from this point to another point
-          * @param {Point} p the other point
-          * @return {Number} distance
-          */
-         dist: function dist(p) {
-           return Math.sqrt(this.distSqr(p));
-         },
+               if (isCrossingIndoors) {
+                 fixes.push(new validationIssueFix({
+                   icon: 'iD-icon-layers',
+                   title: _t.html('issues.fix.use_different_levels.title')
+                 }));
+               } else if (isCrossingTunnels || isCrossingBridges || featureType1 === 'building' || featureType2 === 'building') {
+                 fixes.push(makeChangeLayerFix('higher'));
+                 fixes.push(makeChangeLayerFix('lower')); // can only add bridge/tunnel if both features are lines
+               } else if (context.graph().geometry(this.entityIds[0]) === 'line' && context.graph().geometry(this.entityIds[1]) === 'line') {
+                 // don't recommend adding bridges to waterways since they're uncommon
+                 if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
+                   fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
+                 } // don't recommend adding tunnels under waterways since they're uncommon
 
-         /**
-          * Calculate the distance from this point to another point,
-          * without the square root step. Useful if you're comparing
-          * relative distances.
-          * @param {Point} p the other point
-          * @return {Number} distance
-          */
-         distSqr: function distSqr(p) {
-           var dx = p.x - this.x,
-               dy = p.y - this.y;
-           return dx * dx + dy * dy;
-         },
 
-         /**
-          * Get the angle from the 0, 0 coordinate to this point, in radians
-          * coordinates.
-          * @return {Number} angle
-          */
-         angle: function angle() {
-           return Math.atan2(this.y, this.x);
-         },
+                 var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
 
-         /**
-          * Get the angle from this point to another point, in radians
-          * @param {Point} b the other point
-          * @return {Number} angle
-          */
-         angleTo: function angleTo(b) {
-           return Math.atan2(this.y - b.y, this.x - b.x);
-         },
+                 if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
+                   fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
+                 }
+               } // repositioning the features is always an option
 
-         /**
-          * Get the angle between this point and another point, in radians
-          * @param {Point} b the other point
-          * @return {Number} angle
-          */
-         angleWith: function angleWith(b) {
-           return this.angleWithSep(b.x, b.y);
-         },
 
-         /*
-          * Find the angle of the two vectors, solving the formula for
-          * the cross product a x b = |a||b|sin(θ) for θ.
-          * @param {Number} x the x-coordinate
-          * @param {Number} y the y-coordinate
-          * @return {Number} the angle in radians
-          */
-         angleWithSep: function angleWithSep(x, y) {
-           return Math.atan2(this.x * y - this.y * x, this.x * x + this.y * y);
-         },
-         _matMult: function _matMult(m) {
-           var x = m[0] * this.x + m[1] * this.y,
-               y = m[2] * this.x + m[3] * this.y;
-           this.x = x;
-           this.y = y;
-           return this;
-         },
-         _add: function _add(p) {
-           this.x += p.x;
-           this.y += p.y;
-           return this;
-         },
-         _sub: function _sub(p) {
-           this.x -= p.x;
-           this.y -= p.y;
-           return this;
-         },
-         _mult: function _mult(k) {
-           this.x *= k;
-           this.y *= k;
-           return this;
-         },
-         _div: function _div(k) {
-           this.x /= k;
-           this.y /= k;
-           return this;
-         },
-         _multByPoint: function _multByPoint(p) {
-           this.x *= p.x;
-           this.y *= p.y;
-           return this;
-         },
-         _divByPoint: function _divByPoint(p) {
-           this.x /= p.x;
-           this.y /= p.y;
-           return this;
-         },
-         _unit: function _unit() {
-           this._div(this.mag());
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-move',
+                 title: _t.html('issues.fix.reposition_features.title')
+               }));
+               return fixes;
+             }
+           });
 
-           return this;
-         },
-         _perp: function _perp() {
-           var y = this.y;
-           this.y = this.x;
-           this.x = -y;
-           return this;
-         },
-         _rotate: function _rotate(angle) {
-           var cos = Math.cos(angle),
-               sin = Math.sin(angle),
-               x = cos * this.x - sin * this.y,
-               y = sin * this.x + cos * this.y;
-           this.x = x;
-           this.y = y;
-           return this;
-         },
-         _rotateAround: function _rotateAround(angle, p) {
-           var cos = Math.cos(angle),
-               sin = Math.sin(angle),
-               x = p.x + cos * (this.x - p.x) - sin * (this.y - p.y),
-               y = p.y + sin * (this.x - p.x) + cos * (this.y - p.y);
-           this.x = x;
-           this.y = y;
-           return this;
-         },
-         _round: function _round() {
-           this.x = Math.round(this.x);
-           this.y = Math.round(this.y);
-           return this;
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.crossing_ways.' + crossingTypeID + '.reference'));
+           }
          }
-       };
-       /**
-        * Construct a point from an array if necessary, otherwise if the input
-        * is already a Point, or an unknown type, return it unchanged
-        * @param {Array<Number>|Point|*} a any kind of input value
-        * @return {Point} constructed point, or passed-through value.
-        * @example
-        * // this
-        * var point = Point.convert([0, 1]);
-        * // is equivalent to
-        * var point = new Point(0, 1);
-        */
 
-       Point.convert = function (a) {
-         if (a instanceof Point) {
-           return a;
-         }
+         function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel) {
+           return new validationIssueFix({
+             icon: iconName,
+             title: _t.html('issues.fix.' + fixTitleID + '.title'),
+             onClick: function onClick(context) {
+               var mode = context.mode();
+               if (!mode || mode.id !== 'select') return;
+               var selectedIDs = mode.selectedIDs();
+               if (selectedIDs.length !== 1) return;
+               var selectedWayID = selectedIDs[0];
+               if (!context.hasEntity(selectedWayID)) return;
+               var resultWayIDs = [selectedWayID];
+               var edge, crossedEdge, crossedWayID;
 
-         if (Array.isArray(a)) {
-           return new Point(a[0], a[1]);
-         }
+               if (this.issue.entityIds[0] === selectedWayID) {
+                 edge = this.issue.data.edges[0];
+                 crossedEdge = this.issue.data.edges[1];
+                 crossedWayID = this.issue.entityIds[1];
+               } else {
+                 edge = this.issue.data.edges[1];
+                 crossedEdge = this.issue.data.edges[0];
+                 crossedWayID = this.issue.entityIds[0];
+               }
 
-         return a;
-       };
+               var crossingLoc = this.issue.loc;
+               var projection = context.projection;
 
-       var vectortilefeature = VectorTileFeature;
+               var action = function actionAddStructure(graph) {
+                 var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+                 var crossedWay = graph.hasEntity(crossedWayID); // use the explicit width of the crossed feature as the structure length, if available
 
-       function VectorTileFeature(pbf, end, extent, keys, values) {
-         // Public
-         this.properties = {};
-         this.extent = extent;
-         this.type = 0; // Private
+                 var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
 
-         this._pbf = pbf;
-         this._geometry = -1;
-         this._keys = keys;
-         this._values = values;
-         pbf.readFields(readFeature, this, end);
-       }
+                 if (!structLengthMeters) {
+                   // if no explicit width is set, approximate the width based on the tags
+                   structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
+                 }
 
-       function readFeature(tag, feature, pbf) {
-         if (tag == 1) feature.id = pbf.readVarint();else if (tag == 2) readTag(pbf, feature);else if (tag == 3) feature.type = pbf.readVarint();else if (tag == 4) feature._geometry = pbf.pos;
-       }
+                 if (structLengthMeters) {
+                   if (getFeatureType(crossedWay, graph) === 'railway') {
+                     // bridges over railways are generally much longer than the rail bed itself, compensate
+                     structLengthMeters *= 2;
+                   }
+                 } else {
+                   // should ideally never land here since all rail/water/road tags should have an implied width
+                   structLengthMeters = 8;
+                 }
 
-       function readTag(pbf, feature) {
-         var end = pbf.readVarint() + pbf.pos;
+                 var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
+                 var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
+                 var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
+                 if (crossingAngle > Math.PI) crossingAngle -= Math.PI; // lengthen the structure to account for the angle of the crossing
 
-         while (pbf.pos < end) {
-           var key = feature._keys[pbf.readVarint()],
-               value = feature._values[pbf.readVarint()];
+                 structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
 
-           feature.properties[key] = value;
-         }
-       }
+                 structLengthMeters += 4; // clamp the length to a reasonable range
 
-       VectorTileFeature.types = ['Unknown', 'Point', 'LineString', 'Polygon'];
+                 structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
 
-       VectorTileFeature.prototype.loadGeometry = function () {
-         var pbf = this._pbf;
-         pbf.pos = this._geometry;
-         var end = pbf.readVarint() + pbf.pos,
-             cmd = 1,
-             length = 0,
-             x = 0,
-             y = 0,
-             lines = [],
-             line;
+                 function geomToProj(geoPoint) {
+                   return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
+                 }
 
-         while (pbf.pos < end) {
-           if (length <= 0) {
-             var cmdLen = pbf.readVarint();
-             cmd = cmdLen & 0x7;
-             length = cmdLen >> 3;
-           }
+                 function projToGeom(projPoint) {
+                   var lat = geoMetersToLat(projPoint[1]);
+                   return [geoMetersToLon(projPoint[0], lat), lat];
+                 }
 
-           length--;
+                 var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
+                 var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
+                 var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
+                 var projectedCrossingLoc = geomToProj(crossingLoc);
+                 var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) / geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
 
-           if (cmd === 1 || cmd === 2) {
-             x += pbf.readSVarint();
-             y += pbf.readSVarint();
+                 function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
+                   var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
+                   return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
+                 }
 
-             if (cmd === 1) {
-               // moveTo
-               if (line) lines.push(line);
-               line = [];
-             }
+                 var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
+                   return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
+                 };
 
-             line.push(new pointGeometry(x, y));
-           } else if (cmd === 7) {
-             // Workaround for https://github.com/mapbox/mapnik-vector-tile/issues/90
-             if (line) {
-               line.push(line[0].clone()); // closePolygon
-             }
-           } else {
-             throw new Error('unknown command ' + cmd);
-           }
-         }
+                 var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
+                   return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
+                 }; // avoid creating very short edges from splitting too close to another node
 
-         if (line) lines.push(line);
-         return lines;
-       };
 
-       VectorTileFeature.prototype.bbox = function () {
-         var pbf = this._pbf;
-         pbf.pos = this._geometry;
-         var end = pbf.readVarint() + pbf.pos,
-             cmd = 1,
-             length = 0,
-             x = 0,
-             y = 0,
-             x1 = Infinity,
-             x2 = -Infinity,
-             y1 = Infinity,
-             y2 = -Infinity;
+                 var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
 
-         while (pbf.pos < end) {
-           if (length <= 0) {
-             var cmdLen = pbf.readVarint();
-             cmd = cmdLen & 0x7;
-             length = cmdLen >> 3;
-           }
+                 function determineEndpoint(edge, endNode, locGetter) {
+                   var newNode;
+                   var idealLengthMeters = structLengthMeters / 2; // distance between the crossing location and the end of the edge,
+                   // the maximum length of this side of the structure
 
-           length--;
+                   var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
 
-           if (cmd === 1 || cmd === 2) {
-             x += pbf.readSVarint();
-             y += pbf.readSVarint();
-             if (x < x1) x1 = x;
-             if (x > x2) x2 = x;
-             if (y < y1) y1 = y;
-             if (y > y2) y2 = y;
-           } else if (cmd !== 7) {
-             throw new Error('unknown command ' + cmd);
-           }
-         }
+                   if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
+                     // the edge is long enough to insert a new node
+                     // the loc that would result in the full expected length
+                     var idealNodeLoc = locGetter(idealLengthMeters);
+                     newNode = osmNode();
+                     graph = actionAddMidpoint({
+                       loc: idealNodeLoc,
+                       edge: edge
+                     }, newNode)(graph);
+                   } else {
+                     var edgeCount = 0;
+                     endNode.parentIntersectionWays(graph).forEach(function (way) {
+                       way.nodes.forEach(function (nodeID) {
+                         if (nodeID === endNode.id) {
+                           if (endNode.id === way.first() && endNode.id !== way.last() || endNode.id === way.last() && endNode.id !== way.first()) {
+                             edgeCount += 1;
+                           } else {
+                             edgeCount += 2;
+                           }
+                         }
+                       });
+                     });
 
-         return [x1, y1, x2, y2];
-       };
+                     if (edgeCount >= 3) {
+                       // the end node is a junction, try to leave a segment
+                       // between it and the structure - #7202
+                       var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
 
-       VectorTileFeature.prototype.toGeoJSON = function (x, y, z) {
-         var size = this.extent * Math.pow(2, z),
-             x0 = this.extent * x,
-             y0 = this.extent * y,
-             coords = this.loadGeometry(),
-             type = VectorTileFeature.types[this.type],
-             i,
-             j;
+                       if (insetLength > minEdgeLengthMeters) {
+                         var insetNodeLoc = locGetter(insetLength);
+                         newNode = osmNode();
+                         graph = actionAddMidpoint({
+                           loc: insetNodeLoc,
+                           edge: edge
+                         }, newNode)(graph);
+                       }
+                     }
+                   } // if the edge is too short to subdivide as desired, then
+                   // just bound the structure at the existing end node
 
-         function project(line) {
-           for (var j = 0; j < line.length; j++) {
-             var p = line[j],
-                 y2 = 180 - (p.y + y0) * 360 / size;
-             line[j] = [(p.x + x0) * 360 / size - 180, 360 / Math.PI * Math.atan(Math.exp(y2 * Math.PI / 180)) - 90];
-           }
-         }
 
-         switch (this.type) {
-           case 1:
-             var points = [];
+                   if (!newNode) newNode = endNode;
+                   var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
+                   // do the split
 
-             for (i = 0; i < coords.length; i++) {
-               points[i] = coords[i][0];
-             }
+                   graph = splitAction(graph);
 
-             coords = points;
-             project(coords);
-             break;
+                   if (splitAction.getCreatedWayIDs().length) {
+                     resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
+                   }
 
-           case 2:
-             for (i = 0; i < coords.length; i++) {
-               project(coords[i]);
-             }
+                   return newNode;
+                 }
 
-             break;
+                 var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
+                 var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
+                 var structureWay = resultWayIDs.map(function (id) {
+                   return graph.entity(id);
+                 }).find(function (way) {
+                   return way.nodes.indexOf(structEndNode1.id) !== -1 && way.nodes.indexOf(structEndNode2.id) !== -1;
+                 });
+                 var tags = Object.assign({}, structureWay.tags); // copy tags
 
-           case 3:
-             coords = classifyRings(coords);
+                 if (bridgeOrTunnel === 'bridge') {
+                   tags.bridge = 'yes';
+                   tags.layer = '1';
+                 } else {
+                   var tunnelValue = 'yes';
 
-             for (i = 0; i < coords.length; i++) {
-               for (j = 0; j < coords[i].length; j++) {
-                 project(coords[i][j]);
-               }
-             }
+                   if (getFeatureType(structureWay, graph) === 'waterway') {
+                     // use `tunnel=culvert` for waterways by default
+                     tunnelValue = 'culvert';
+                   }
 
-             break;
-         }
+                   tags.tunnel = tunnelValue;
+                   tags.layer = '-1';
+                 } // apply the structure tags to the way
 
-         if (coords.length === 1) {
-           coords = coords[0];
-         } else {
-           type = 'Multi' + type;
-         }
 
-         var result = {
-           type: "Feature",
-           geometry: {
-             type: type,
-             coordinates: coords
-           },
-           properties: this.properties
-         };
+                 graph = actionChangeTags(structureWay.id, tags)(graph);
+                 return graph;
+               };
 
-         if ('id' in this) {
-           result.id = this.id;
+               context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
+               context.enter(modeSelect(context, resultWayIDs));
+             }
+           });
          }
 
-         return result;
-       }; // classifies an array of rings into polygons with outer rings and holes
+         function makeConnectWaysFix(connectionTags) {
+           var fixTitleID = 'connect_features';
 
+           if (connectionTags.ford) {
+             fixTitleID = 'connect_using_ford';
+           }
 
-       function classifyRings(rings) {
-         var len = rings.length;
-         if (len <= 1) return [rings];
-         var polygons = [],
-             polygon,
-             ccw;
+           return new validationIssueFix({
+             icon: 'iD-icon-crossing',
+             title: _t.html('issues.fix.' + fixTitleID + '.title'),
+             onClick: function onClick(context) {
+               var loc = this.issue.loc;
+               var connectionTags = this.issue.data.connectionTags;
+               var edges = this.issue.data.edges;
+               context.perform(function actionConnectCrossingWays(graph) {
+                 // create the new node for the points
+                 var node = osmNode({
+                   loc: loc,
+                   tags: connectionTags
+                 });
+                 graph = graph.replace(node);
+                 var nodesToMerge = [node.id];
+                 var mergeThresholdInMeters = 0.75;
+                 edges.forEach(function (edge) {
+                   var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
+                   var nearby = geoSphericalClosestNode(edgeNodes, loc); // if there is already a suitable node nearby, use that
+                   // use the node if node has no interesting tags or if it is a crossing node #8326
 
-         for (var i = 0; i < len; i++) {
-           var area = signedArea$1(rings[i]);
-           if (area === 0) continue;
-           if (ccw === undefined) ccw = area < 0;
+                   if ((!nearby.node.hasInterestingTags() || nearby.node.isCrossing()) && nearby.distance < mergeThresholdInMeters) {
+                     nodesToMerge.push(nearby.node.id); // else add the new node to the way
+                   } else {
+                     graph = actionAddMidpoint({
+                       loc: loc,
+                       edge: edge
+                     }, node)(graph);
+                   }
+                 });
 
-           if (ccw === area < 0) {
-             if (polygon) polygons.push(polygon);
-             polygon = [rings[i]];
-           } else {
-             polygon.push(rings[i]);
-           }
+                 if (nodesToMerge.length > 1) {
+                   // if we're using nearby nodes, merge them with the new node
+                   graph = actionMergeNodes(nodesToMerge, loc)(graph);
+                 }
+
+                 return graph;
+               }, _t('issues.fix.connect_crossing_features.annotation'));
+             }
+           });
          }
 
-         if (polygon) polygons.push(polygon);
-         return polygons;
-       }
+         function makeChangeLayerFix(higherOrLower) {
+           return new validationIssueFix({
+             icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
+             title: _t.html('issues.fix.tag_this_as_' + higherOrLower + '.title'),
+             onClick: function onClick(context) {
+               var mode = context.mode();
+               if (!mode || mode.id !== 'select') return;
+               var selectedIDs = mode.selectedIDs();
+               if (selectedIDs.length !== 1) return;
+               var selectedID = selectedIDs[0];
+               if (!this.issue.entityIds.some(function (entityId) {
+                 return entityId === selectedID;
+               })) return;
+               var entity = context.hasEntity(selectedID);
+               if (!entity) return;
+               var tags = Object.assign({}, entity.tags); // shallow copy
 
-       function signedArea$1(ring) {
-         var sum = 0;
+               var layer = tags.layer && Number(tags.layer);
 
-         for (var i = 0, len = ring.length, j = len - 1, p1, p2; i < len; j = i++) {
-           p1 = ring[i];
-           p2 = ring[j];
-           sum += (p2.x - p1.x) * (p1.y + p2.y);
+               if (layer && !isNaN(layer)) {
+                 if (higherOrLower === 'higher') {
+                   layer += 1;
+                 } else {
+                   layer -= 1;
+                 }
+               } else {
+                 if (higherOrLower === 'higher') {
+                   layer = 1;
+                 } else {
+                   layer = -1;
+                 }
+               }
+
+               tags.layer = layer.toString();
+               context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
+             }
+           });
          }
 
-         return sum;
+         validation.type = type;
+         return validation;
        }
 
-       var vectortilelayer = VectorTileLayer;
-
-       function VectorTileLayer(pbf, end) {
-         // Public
-         this.version = 1;
-         this.name = null;
-         this.extent = 4096;
-         this.length = 0; // Private
+       function behaviorDrawWay(context, wayID, mode, startGraph) {
+         var keybinding = utilKeybinding('drawWay');
+         var dispatch = dispatch$8('rejectedSelfIntersection');
+         var behavior = behaviorDraw(context); // Must be set by `drawWay.nodeIndex` before each install of this behavior.
 
-         this._pbf = pbf;
-         this._keys = [];
-         this._values = [];
-         this._features = [];
-         pbf.readFields(readLayer, this, end);
-         this.length = this._features.length;
-       }
+         var _nodeIndex;
 
-       function readLayer(tag, layer, pbf) {
-         if (tag === 15) layer.version = pbf.readVarint();else if (tag === 1) layer.name = pbf.readString();else if (tag === 5) layer.extent = pbf.readVarint();else if (tag === 2) layer._features.push(pbf.pos);else if (tag === 3) layer._keys.push(pbf.readString());else if (tag === 4) layer._values.push(readValueMessage(pbf));
-       }
+         var _origWay;
 
-       function readValueMessage(pbf) {
-         var value = null,
-             end = pbf.readVarint() + pbf.pos;
+         var _wayGeometry;
 
-         while (pbf.pos < end) {
-           var tag = pbf.readVarint() >> 3;
-           value = tag === 1 ? pbf.readString() : tag === 2 ? pbf.readFloat() : tag === 3 ? pbf.readDouble() : tag === 4 ? pbf.readVarint64() : tag === 5 ? pbf.readVarint() : tag === 6 ? pbf.readSVarint() : tag === 7 ? pbf.readBoolean() : null;
-         }
+         var _headNodeID;
 
-         return value;
-       } // return feature `i` from this layer as a `VectorTileFeature`
+         var _annotation;
 
+         var _pointerHasMoved = false; // The osmNode to be placed.
+         // This is temporary and just follows the mouse cursor until an "add" event occurs.
 
-       VectorTileLayer.prototype.feature = function (i) {
-         if (i < 0 || i >= this._features.length) throw new Error('feature index out of bounds');
-         this._pbf.pos = this._features[i];
+         var _drawNode;
 
-         var end = this._pbf.readVarint() + this._pbf.pos;
+         var _didResolveTempEdit = false;
 
-         return new vectortilefeature(this._pbf, end, this.extent, this._keys, this._values);
-       };
+         function createDrawNode(loc) {
+           // don't make the draw node until we actually need it
+           _drawNode = osmNode({
+             loc: loc
+           });
+           context.pauseChangeDispatch();
+           context.replace(function actionAddDrawNode(graph) {
+             // add the draw node to the graph and insert it into the way
+             var way = graph.entity(wayID);
+             return graph.replace(_drawNode).replace(way.addNode(_drawNode.id, _nodeIndex));
+           }, _annotation);
+           context.resumeChangeDispatch();
+           setActiveElements();
+         }
 
-       var vectortile = VectorTile;
+         function removeDrawNode() {
+           context.pauseChangeDispatch();
+           context.replace(function actionDeleteDrawNode(graph) {
+             var way = graph.entity(wayID);
+             return graph.replace(way.removeNode(_drawNode.id)).remove(_drawNode);
+           }, _annotation);
+           _drawNode = undefined;
+           context.resumeChangeDispatch();
+         }
 
-       function VectorTile(pbf, end) {
-         this.layers = pbf.readFields(readTile, {}, end);
-       }
+         function keydown(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope')) {
+               context.surface().classed('nope-suppressed', true);
+             }
 
-       function readTile(tag, layers, pbf) {
-         if (tag === 3) {
-           var layer = new vectortilelayer(pbf, pbf.readVarint() + pbf.pos);
-           if (layer.length) layers[layer.name] = layer;
+             context.surface().classed('nope', false).classed('nope-disabled', true);
+           }
          }
-       }
 
-       var VectorTile$1 = vectortile;
-       var VectorTileFeature$1 = vectortilefeature;
-       var VectorTileLayer$1 = vectortilelayer;
-       var vectorTile = {
-         VectorTile: VectorTile$1,
-         VectorTileFeature: VectorTileFeature$1,
-         VectorTileLayer: VectorTileLayer$1
-       };
+         function keyup(d3_event) {
+           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
+             if (context.surface().classed('nope-suppressed')) {
+               context.surface().classed('nope', true);
+             }
 
-       var tiler$7 = utilTiler().tileSize(512).margin(1);
-       var dispatch$8 = dispatch('loadedData');
+             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+           }
+         }
 
-       var _vtCache;
+         function allowsVertex(d) {
+           return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
+         } // related code
+         // - `mode/drag_node.js`     `doMove()`
+         // - `behavior/draw.js`      `click()`
+         // - `behavior/draw_way.js`  `move()`
 
-       function abortRequest$7(controller) {
-         controller.abort();
-       }
 
-       function vtToGeoJSON(data, tile, mergeCache) {
-         var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
-         var layers = Object.keys(vectorTile$1.layers);
+         function move(d3_event, datum) {
+           var loc = context.map().mouseCoordinates();
+           if (!_drawNode) createDrawNode(loc);
+           context.surface().classed('nope-disabled', d3_event.altKey);
+           var targetLoc = datum && datum.properties && datum.properties.entity && allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
+           var targetNodes = datum && datum.properties && datum.properties.nodes;
 
-         if (!Array.isArray(layers)) {
-           layers = [layers];
-         }
+           if (targetLoc) {
+             // snap to node/vertex - a point target with `.loc`
+             loc = targetLoc;
+           } else if (targetNodes) {
+             // snap to way - a line target with `.nodes`
+             var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);
 
-         var features = [];
-         layers.forEach(function (layerID) {
-           var layer = vectorTile$1.layers[layerID];
+             if (choice) {
+               loc = choice.loc;
+             }
+           }
 
-           if (layer) {
-             for (var i = 0; i < layer.length; i++) {
-               var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
-               var geometry = feature.geometry; // Treat all Polygons as MultiPolygons
+           context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+           _drawNode = context.entity(_drawNode.id);
+           checkGeometry(true
+           /* includeDrawNode */
+           );
+         } // Check whether this edit causes the geometry to break.
+         // If so, class the surface with a nope cursor.
+         // `includeDrawNode` - Only check the relevant line segments if finishing drawing
 
-               if (geometry.type === 'Polygon') {
-                 geometry.type = 'MultiPolygon';
-                 geometry.coordinates = [geometry.coordinates];
-               }
 
-               var isClipped = false; // Clip to tile bounds
+         function checkGeometry(includeDrawNode) {
+           var nopeDisabled = context.surface().classed('nope-disabled');
+           var isInvalid = isInvalidGeometry(includeDrawNode);
 
-               if (geometry.type === 'MultiPolygon') {
-                 var featureClip = turf_bboxClip(feature, tile.extent.rectangle());
+           if (nopeDisabled) {
+             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
+           } else {
+             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+           }
+         }
 
-                 if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
-                   // feature = featureClip;
-                   isClipped = true;
-                 }
+         function isInvalidGeometry(includeDrawNode) {
+           var testNode = _drawNode; // we only need to test the single way we're drawing
 
-                 if (!feature.geometry.coordinates.length) continue; // not actually on this tile
+           var parentWay = context.graph().entity(wayID);
+           var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
 
-                 if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
-               } // Generate some unique IDs and add some metadata
+           if (includeDrawNode) {
+             if (parentWay.isClosed()) {
+               // don't test the last segment for closed ways - #4655
+               // (still test the first segment)
+               nodes.pop();
+             }
+           } else {
+             // discount the draw node
+             if (parentWay.isClosed()) {
+               if (nodes.length < 3) return false;
+               if (_drawNode) nodes.splice(-2, 1);
+               testNode = nodes[nodes.length - 2];
+             } else {
+               // there's nothing we need to test if we ignore the draw node on open ways
+               return false;
+             }
+           }
 
+           return testNode && geoHasSelfIntersections(nodes, testNode.id);
+         }
 
-               var featurehash = utilHashcode(fastJsonStableStringify(feature));
-               var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
-               feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
-               feature.__featurehash__ = featurehash;
-               feature.__propertyhash__ = propertyhash;
-               features.push(feature); // Clipped Polygons at same zoom with identical properties can get merged
+         function undone() {
+           // undoing removed the temp edit
+           _didResolveTempEdit = true;
+           context.pauseChangeDispatch();
+           var nextMode;
 
-               if (isClipped && geometry.type === 'MultiPolygon') {
-                 var merged = mergeCache[propertyhash];
+           if (context.graph() === startGraph) {
+             // We've undone back to the initial state before we started drawing.
+             // Just exit the draw mode without undoing whatever we did before
+             // we entered the draw mode.
+             nextMode = modeSelect(context, [wayID]);
+           } else {
+             // The `undo` only removed the temporary edit, so here we have to
+             // manually undo to actually remove the last node we added. We can't
+             // use the `undo` function since the initial "add" graph doesn't have
+             // an annotation and so cannot be undone to.
+             context.pop(1); // continue drawing
 
-                 if (merged && merged.length) {
-                   var other = merged[0];
-                   var coords = union(feature.geometry.coordinates, other.geometry.coordinates);
+             nextMode = mode;
+           } // clear the redo stack by adding and removing a blank edit
 
-                   if (!coords || !coords.length) {
-                     continue; // something failed in martinez union
-                   }
 
-                   merged.push(feature);
+           context.perform(actionNoop());
+           context.pop(1);
+           context.resumeChangeDispatch();
+           context.enter(nextMode);
+         }
 
-                   for (var j = 0; j < merged.length; j++) {
-                     // all these features get...
-                     merged[j].geometry.coordinates = coords; // same coords
+         function setActiveElements() {
+           if (!_drawNode) return;
+           context.surface().selectAll('.' + _drawNode.id).classed('active', true);
+         }
 
-                     merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
-                   }
-                 } else {
-                   mergeCache[propertyhash] = [feature];
-                 }
-               }
-             }
+         function resetToStartGraph() {
+           while (context.graph() !== startGraph) {
+             context.pop();
            }
-         });
-         return features;
-       }
+         }
 
-       function loadTile(source, tile) {
-         if (source.loaded[tile.id] || source.inflight[tile.id]) return;
-         var url = source.template.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]) // TMS-flipped y coordinate
-         .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1).replace(/\{z(oom)?\}/, tile.xyz[2]).replace(/\{switch:([^}]+)\}/, function (s, r) {
-           var subdomains = r.split(',');
-           return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
-         });
-         var controller = new AbortController();
-         source.inflight[tile.id] = controller;
-         fetch(url, {
-           signal: controller.signal
-         }).then(function (response) {
-           if (!response.ok) {
-             throw new Error(response.status + ' ' + response.statusText);
-           }
+         var drawWay = function drawWay(surface) {
+           _drawNode = undefined;
+           _didResolveTempEdit = false;
+           _origWay = context.entity(wayID);
 
-           source.loaded[tile.id] = [];
-           delete source.inflight[tile.id];
-           return response.arrayBuffer();
-         }).then(function (data) {
-           if (!data) {
-             throw new Error('No Data');
+           if (typeof _nodeIndex === 'number') {
+             _headNodeID = _origWay.nodes[_nodeIndex];
+           } else if (_origWay.isClosed()) {
+             _headNodeID = _origWay.nodes[_origWay.nodes.length - 2];
+           } else {
+             _headNodeID = _origWay.nodes[_origWay.nodes.length - 1];
            }
 
-           var z = tile.xyz[2];
-
-           if (!source.canMerge[z]) {
-             source.canMerge[z] = {}; // initialize mergeCache
-           }
+           _wayGeometry = _origWay.geometry(context.graph());
+           _annotation = _t((_origWay.nodes.length === (_origWay.isClosed() ? 2 : 1) ? 'operations.start.annotation.' : 'operations.continue.annotation.') + _wayGeometry);
+           _pointerHasMoved = false; // Push an annotated state for undo to return back to.
+           // We must make sure to replace or remove it later.
 
-           source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
-           dispatch$8.call('loadedData');
-         })["catch"](function () {
-           source.loaded[tile.id] = [];
-           delete source.inflight[tile.id];
-         });
-       }
+           context.pauseChangeDispatch();
+           context.perform(actionNoop(), _annotation);
+           context.resumeChangeDispatch();
+           behavior.hover().initialNodeID(_headNodeID);
+           behavior.on('move', function () {
+             _pointerHasMoved = true;
+             move.apply(this, arguments);
+           }).on('down', function () {
+             move.apply(this, arguments);
+           }).on('downcancel', function () {
+             if (_drawNode) removeDrawNode();
+           }).on('click', drawWay.add).on('clickWay', drawWay.addWay).on('clickNode', drawWay.addNode).on('undo', context.undo).on('cancel', drawWay.cancel).on('finish', drawWay.finish);
+           select(window).on('keydown.drawWay', keydown).on('keyup.drawWay', keyup);
+           context.map().dblclickZoomEnable(false).on('drawn.draw', setActiveElements);
+           setActiveElements();
+           surface.call(behavior);
+           context.history().on('undone.draw', undone);
+         };
 
-       var serviceVectorTile = {
-         init: function init() {
-           if (!_vtCache) {
-             this.reset();
+         drawWay.off = function (surface) {
+           if (!_didResolveTempEdit) {
+             // Drawing was interrupted unexpectedly.
+             // This can happen if the user changes modes,
+             // clicks geolocate button, a hashchange event occurs, etc.
+             context.pauseChangeDispatch();
+             resetToStartGraph();
+             context.resumeChangeDispatch();
            }
 
-           this.event = utilRebind(this, dispatch$8, 'on');
-         },
-         reset: function reset() {
-           for (var sourceID in _vtCache) {
-             var source = _vtCache[sourceID];
+           _drawNode = undefined;
+           _nodeIndex = undefined;
+           context.map().on('drawn.draw', null);
+           surface.call(behavior.off).selectAll('.active').classed('active', false);
+           surface.classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false);
+           select(window).on('keydown.drawWay', null).on('keyup.drawWay', null);
+           context.history().on('undone.draw', null);
+         };
 
-             if (source && source.inflight) {
-               Object.values(source.inflight).forEach(abortRequest$7);
-             }
+         function attemptAdd(d, loc, doAdd) {
+           if (_drawNode) {
+             // move the node to the final loc in case move wasn't called
+             // consistently (e.g. on touch devices)
+             context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
+             _drawNode = context.entity(_drawNode.id);
+           } else {
+             createDrawNode(loc);
            }
 
-           _vtCache = {};
-         },
-         addSource: function addSource(sourceID, template) {
-           _vtCache[sourceID] = {
-             template: template,
-             inflight: {},
-             loaded: {},
-             canMerge: {}
-           };
-           return _vtCache[sourceID];
-         },
-         data: function data(sourceID, projection) {
-           var source = _vtCache[sourceID];
-           if (!source) return [];
-           var tiles = tiler$7.getTiles(projection);
-           var seen = {};
-           var results = [];
-
-           for (var i = 0; i < tiles.length; i++) {
-             var features = source.loaded[tiles[i].id];
-             if (!features || !features.length) continue;
-
-             for (var j = 0; j < features.length; j++) {
-               var feature = features[j];
-               var hash = feature.__featurehash__;
-               if (seen[hash]) continue;
-               seen[hash] = true; // return a shallow copy, because the hash may change
-               // later if this feature gets merged with another
+           checkGeometry(true
+           /* includeDrawNode */
+           );
 
-               results.push(Object.assign({}, feature)); // shallow copy
+           if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
+             if (!_pointerHasMoved) {
+               // prevent the temporary draw node from appearing on touch devices
+               removeDrawNode();
              }
-           }
-
-           return results;
-         },
-         loadTiles: function loadTiles(sourceID, template, projection) {
-           var source = _vtCache[sourceID];
 
-           if (!source) {
-             source = this.addSource(sourceID, template);
+             dispatch.call('rejectedSelfIntersection', this);
+             return; // can't click here
            }
 
-           var tiles = tiler$7.getTiles(projection); // abort inflight requests that are no longer needed
-
-           Object.keys(source.inflight).forEach(function (k) {
-             var wanted = tiles.find(function (tile) {
-               return k === tile.id;
-             });
+           context.pauseChangeDispatch();
+           doAdd(); // we just replaced the temporary edit with the real one
 
-             if (!wanted) {
-               abortRequest$7(source.inflight[k]);
-               delete source.inflight[k];
-             }
-           });
-           tiles.forEach(function (tile) {
-             loadTile(source, tile);
-           });
-         },
-         cache: function cache() {
-           return _vtCache;
-         }
-       };
+           _didResolveTempEdit = true;
+           context.resumeChangeDispatch();
+           context.enter(mode);
+         } // Accept the current position of the drawing node
 
-       var apibase$3 = 'https://www.wikidata.org/w/api.php?';
-       var _wikidataCache = {};
-       var serviceWikidata = {
-         init: function init() {},
-         reset: function reset() {
-           _wikidataCache = {};
-         },
-         // Search for Wikidata items matching the query
-         itemsForSearchQuery: function itemsForSearchQuery(query, callback) {
-           if (!query) {
-             if (callback) callback('No query', {});
-             return;
-           }
 
-           var lang = this.languagesToQuery()[0];
-           var url = apibase$3 + utilQsString({
-             action: 'wbsearchentities',
-             format: 'json',
-             formatversion: 2,
-             search: query,
-             type: 'item',
-             // the language to search
-             language: lang,
-             // the language for the label and description in the result
-             uselang: lang,
-             limit: 10,
-             origin: '*'
+         drawWay.add = function (loc, d) {
+           attemptAdd(d, loc, function () {// don't need to do anything extra
            });
-           d3_json(url).then(function (result) {
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+         }; // Connect the way to an existing way
 
-             if (callback) callback(null, result.search || {});
-           })["catch"](function (err) {
-             if (callback) callback(err.message, {});
-           });
-         },
-         // Given a Wikipedia language and article title,
-         // return an array of corresponding Wikidata entities.
-         itemsByTitle: function itemsByTitle(lang, title, callback) {
-           if (!title) {
-             if (callback) callback('No title', {});
-             return;
-           }
 
-           lang = lang || 'en';
-           var url = apibase$3 + utilQsString({
-             action: 'wbgetentities',
-             format: 'json',
-             formatversion: 2,
-             sites: lang.replace(/-/g, '_') + 'wiki',
-             titles: title,
-             languages: 'en',
-             // shrink response by filtering to one language
-             origin: '*'
+         drawWay.addWay = function (loc, edge, d) {
+           attemptAdd(d, loc, function () {
+             context.replace(actionAddMidpoint({
+               loc: loc,
+               edge: edge
+             }, _drawNode), _annotation);
            });
-           d3_json(url).then(function (result) {
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+         }; // Connect the way to an existing node
 
-             if (callback) callback(null, result.entities || {});
-           })["catch"](function (err) {
-             if (callback) callback(err.message, {});
-           });
-         },
-         languagesToQuery: function languagesToQuery() {
-           return _mainLocalizer.localeCodes().map(function (code) {
-             return code.toLowerCase();
-           }).filter(function (code) {
-             // HACK: en-us isn't a wikidata language. We should really be filtering by
-             // the languages known to be supported by wikidata.
-             return code !== 'en-us';
-           });
-         },
-         entityByQID: function entityByQID(qid, callback) {
-           if (!qid) {
-             callback('No qid', {});
-             return;
-           }
 
-           if (_wikidataCache[qid]) {
-             if (callback) callback(null, _wikidataCache[qid]);
+         drawWay.addNode = function (node, d) {
+           // finish drawing if the mapper targets the prior node
+           if (node.id === _headNodeID || // or the first node when drawing an area
+           _origWay.isClosed() && node.id === _origWay.first()) {
+             drawWay.finish();
              return;
            }
 
-           var langs = this.languagesToQuery();
-           var url = apibase$3 + utilQsString({
-             action: 'wbgetentities',
-             format: 'json',
-             formatversion: 2,
-             ids: qid,
-             props: 'labels|descriptions|claims|sitelinks',
-             sitefilter: langs.map(function (d) {
-               return d + 'wiki';
-             }).join('|'),
-             languages: langs.join('|'),
-             languagefallback: 1,
-             origin: '*'
+           attemptAdd(d, node.loc, function () {
+             context.replace(function actionReplaceDrawNode(graph) {
+               // remove the temporary draw node and insert the existing node
+               // at the same index
+               graph = graph.replace(graph.entity(wayID).removeNode(_drawNode.id)).remove(_drawNode);
+               return graph.replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
+             }, _annotation);
            });
-           d3_json(url).then(function (result) {
-             if (result && result.error) {
-               throw new Error(result.error);
-             }
+         };
+         /**
+          * @param {(typeof osmWay)[]} ways
+          * @returns {"line" | "area" | "generic"}
+          */
 
-             if (callback) callback(null, result.entities[qid] || {});
-           })["catch"](function (err) {
-             if (callback) callback(err.message, {});
-           });
-         },
-         // Pass `params` object of the form:
-         // {
-         //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-         // }
-         //
-         // Get an result object used to display tag documentation
-         // {
-         //   title:        'string',
-         //   description:  'string',
-         //   editURL:      'string',
-         //   imageURL:     'string',
-         //   wiki:         { title: 'string', text: 'string', url: 'string' }
-         // }
-         //
-         getDocs: function getDocs(params, callback) {
-           var langs = this.languagesToQuery();
-           this.entityByQID(params.qid, function (err, entity) {
-             if (err || !entity) {
-               callback(err || 'No entity');
-               return;
-             }
 
-             var i;
-             var description;
+         function getFeatureType(ways) {
+           if (ways.every(function (way) {
+             return way.isClosed();
+           })) return 'area';
+           if (ways.every(function (way) {
+             return !way.isClosed();
+           })) return 'line';
+           return 'generic';
+         }
+         /** see PR #8671 */
 
-             for (i in langs) {
-               var code = langs[i];
 
-               if (entity.descriptions[code] && entity.descriptions[code].language === code) {
-                 description = entity.descriptions[code];
-                 break;
-               }
-             }
+         function followMode() {
+           if (_didResolveTempEdit) return;
 
-             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
+           try {
+             // get the last 2 added nodes.
+             // check if they are both part of only oneway (the same one)
+             // check if the ways that they're part of are the same way
+             // find index of the last two nodes, to determine the direction to travel around the existing way
+             // add the next node to the way we are drawing
+             // if we're drawing an area, the first node = last node.
+             var isDrawingArea = _origWay.nodes[0] === _origWay.nodes.slice(-1)[0];
 
-             var result = {
-               title: entity.id,
-               description: description ? description.value : '',
-               descriptionLocaleCode: description ? description.language : '',
-               editURL: 'https://www.wikidata.org/wiki/' + entity.id
-             }; // add image
+             var _origWay$nodes$slice = _origWay.nodes.slice(isDrawingArea ? -3 : -2),
+                 _origWay$nodes$slice2 = _slicedToArray(_origWay$nodes$slice, 2),
+                 secondLastNodeId = _origWay$nodes$slice2[0],
+                 lastNodeId = _origWay$nodes$slice2[1]; // Unlike startGraph, the full history graph may contain unsaved vertices to follow.
+             // https://github.com/openstreetmap/iD/issues/8749
 
-             if (entity.claims) {
-               var imageroot = 'https://commons.wikimedia.org/w/index.php';
-               var props = ['P154', 'P18']; // logo image, image
 
-               var prop, image;
+             var historyGraph = context.history().graph();
 
-               for (i = 0; i < props.length; i++) {
-                 prop = entity.claims[props[i]];
+             if (!lastNodeId || !secondLastNodeId || !historyGraph.hasEntity(lastNodeId) || !historyGraph.hasEntity(secondLastNodeId)) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html('operations.follow.error.needs_more_initial_nodes'))();
+               return;
+             } // If the way has looped over itself, follow some other way.
 
-                 if (prop && Object.keys(prop).length > 0) {
-                   image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
 
-                   if (image) {
-                     result.imageURL = imageroot + '?' + utilQsString({
-                       title: 'Special:Redirect/file/' + image,
-                       width: 400
-                     });
-                     break;
-                   }
-                 }
-               }
-             }
+             var lastNodesParents = historyGraph.parentWays(historyGraph.entity(lastNodeId)).filter(function (w) {
+               return w.id !== wayID;
+             });
+             var secondLastNodesParents = historyGraph.parentWays(historyGraph.entity(secondLastNodeId)).filter(function (w) {
+               return w.id !== wayID;
+             });
+             var featureType = getFeatureType(lastNodesParents);
 
-             if (entity.sitelinks) {
-               var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
+             if (lastNodesParents.length !== 1 || secondLastNodesParents.length === 0) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html("operations.follow.error.intersection_of_multiple_ways.".concat(featureType)))();
+               return;
+             } // Check if the last node's parent is also the parent of the second last node.
+             // The last node must only have one parent, but the second last node can have
+             // multiple parents.
 
-               for (i = 0; i < langs.length; i++) {
-                 // check each, in order of preference
-                 var w = langs[i] + 'wiki';
 
-                 if (entity.sitelinks[w]) {
-                   var title = entity.sitelinks[w].title;
-                   var tKey = 'inspector.wiki_reference';
+             if (!secondLastNodesParents.some(function (n) {
+               return n.id === lastNodesParents[0].id;
+             })) {
+               context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html("operations.follow.error.intersection_of_different_ways.".concat(featureType)))();
+               return;
+             }
 
-                   if (!englishLocale && langs[i] === 'en') {
-                     // user's locale isn't English but
-                     tKey = 'inspector.wiki_en_reference'; // we are sending them to enwiki anyway..
-                   }
+             var way = lastNodesParents[0];
+             var indexOfLast = way.nodes.indexOf(lastNodeId);
+             var indexOfSecondLast = way.nodes.indexOf(secondLastNodeId); // for a closed way, the first/last node is the same so it appears twice in the array,
+             // but indexOf always finds the first occurrence. This is only an issue when following a way
+             // in descending order
 
-                   result.wiki = {
-                     title: title,
-                     text: tKey,
-                     url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
-                   };
-                   break;
-                 }
-               }
-             }
+             var isDescendingPastZero = indexOfLast === way.nodes.length - 2 && indexOfSecondLast === 0;
+             var nextNodeIndex = indexOfLast + (indexOfLast > indexOfSecondLast && !isDescendingPastZero ? 1 : -1); // if we're following a closed way and we pass the first/last node, the  next index will be -1
 
-             callback(null, result);
-           });
+             if (nextNodeIndex === -1) nextNodeIndex = indexOfSecondLast === 1 ? way.nodes.length - 2 : 1;
+             var nextNode = historyGraph.entity(way.nodes[nextNodeIndex]);
+             drawWay.addNode(nextNode, {
+               geometry: {
+                 type: 'Point',
+                 coordinates: nextNode.loc
+               },
+               id: nextNode.id,
+               properties: {
+                 target: true,
+                 entity: nextNode
+               }
+             });
+           } catch (ex) {
+             context.ui().flash.duration(4000).iconName('#iD-icon-no').label(_t.html('operations.follow.error.unknown'))();
+           }
          }
-       };
 
-       var endpoint = 'https://en.wikipedia.org/w/api.php?';
-       var serviceWikipedia = {
-         init: function init() {},
-         reset: function reset() {},
-         search: function search(lang, query, callback) {
-           if (!query) {
-             if (callback) callback('No Query', []);
-             return;
-           }
+         keybinding.on(_t('operations.follow.key'), followMode);
+         select(document).call(keybinding); // Finish the draw operation, removing the temporary edit.
+         // If the way has enough nodes to be valid, it's selected.
+         // Otherwise, delete everything and return to browse mode.
 
-           lang = lang || 'en';
-           var url = endpoint.replace('en', lang) + utilQsString({
-             action: 'query',
-             list: 'search',
-             srlimit: '10',
-             srinfo: 'suggestion',
-             format: 'json',
-             origin: '*',
-             srsearch: query
-           });
-           d3_json(url).then(function (result) {
-             if (result && result.error) {
-               throw new Error(result.error);
-             } else if (!result || !result.query || !result.query.search) {
-               throw new Error('No Results');
-             }
+         drawWay.finish = function () {
+           checkGeometry(false
+           /* includeDrawNode */
+           );
 
-             if (callback) {
-               var titles = result.query.search.map(function (d) {
-                 return d.title;
-               });
-               callback(null, titles);
-             }
-           })["catch"](function (err) {
-             if (callback) callback(err, []);
-           });
-         },
-         suggestions: function suggestions(lang, query, callback) {
-           if (!query) {
-             if (callback) callback('', []);
-             return;
+           if (context.surface().classed('nope')) {
+             dispatch.call('rejectedSelfIntersection', this);
+             return; // can't click here
            }
 
-           lang = lang || 'en';
-           var url = endpoint.replace('en', lang) + utilQsString({
-             action: 'opensearch',
-             namespace: 0,
-             suggest: '',
-             format: 'json',
-             origin: '*',
-             search: query
-           });
-           d3_json(url).then(function (result) {
-             if (result && result.error) {
-               throw new Error(result.error);
-             } else if (!result || result.length < 2) {
-               throw new Error('No Results');
-             }
-
-             if (callback) callback(null, result[1] || []);
-           })["catch"](function (err) {
-             if (callback) callback(err.message, []);
-           });
-         },
-         translations: function translations(lang, title, callback) {
-           if (!title) {
-             if (callback) callback('No Title');
+           context.pauseChangeDispatch(); // remove the temporary edit
+
+           context.pop(1);
+           _didResolveTempEdit = true;
+           context.resumeChangeDispatch();
+           var way = context.hasEntity(wayID);
+
+           if (!way || way.isDegenerate()) {
+             drawWay.cancel();
              return;
            }
 
-           var url = endpoint.replace('en', lang) + utilQsString({
-             action: 'query',
-             prop: 'langlinks',
-             format: 'json',
-             origin: '*',
-             lllimit: 500,
-             titles: title
-           });
-           d3_json(url).then(function (result) {
-             if (result && result.error) {
-               throw new Error(result.error);
-             } else if (!result || !result.query || !result.query.pages) {
-               throw new Error('No Results');
-             }
+           window.setTimeout(function () {
+             context.map().dblclickZoomEnable(true);
+           }, 1000);
+           var isNewFeature = !mode.isContinuing;
+           context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
+         }; // Cancel the draw operation, delete everything, and return to browse mode.
 
-             if (callback) {
-               var list = result.query.pages[Object.keys(result.query.pages)[0]];
-               var translations = {};
 
-               if (list && list.langlinks) {
-                 list.langlinks.forEach(function (d) {
-                   translations[d.lang] = d['*'];
-                 });
-               }
+         drawWay.cancel = function () {
+           context.pauseChangeDispatch();
+           resetToStartGraph();
+           context.resumeChangeDispatch();
+           window.setTimeout(function () {
+             context.map().dblclickZoomEnable(true);
+           }, 1000);
+           context.surface().classed('nope', false).classed('nope-disabled', false).classed('nope-suppressed', false);
+           context.enter(modeBrowse(context));
+         };
 
-               callback(null, translations);
-             }
-           })["catch"](function (err) {
-             if (callback) callback(err.message);
-           });
-         }
-       };
+         drawWay.nodeIndex = function (val) {
+           if (!arguments.length) return _nodeIndex;
+           _nodeIndex = val;
+           return drawWay;
+         };
 
-       var services = {
-         geocoder: serviceNominatim,
-         keepRight: serviceKeepRight,
-         improveOSM: serviceImproveOSM,
-         osmose: serviceOsmose,
-         mapillary: serviceMapillary,
-         openstreetcam: serviceOpenstreetcam,
-         osm: serviceOsm,
-         osmWikibase: serviceOsmWikibase,
-         maprules: serviceMapRules,
-         streetside: serviceStreetside,
-         taginfo: serviceTaginfo,
-         vectorTile: serviceVectorTile,
-         wikidata: serviceWikidata,
-         wikipedia: serviceWikipedia
-       };
+         drawWay.activeID = function () {
+           if (!arguments.length) return _drawNode && _drawNode.id; // no assign
 
-       function svgIcon(name, svgklass, useklass) {
-         return function drawIcon(selection) {
-           selection.selectAll('svg.icon' + (svgklass ? '.' + svgklass.split(' ')[0] : '')).data([0]).enter().append('svg').attr('class', 'icon ' + (svgklass || '')).append('use').attr('xlink:href', name).attr('class', useklass);
+           return drawWay;
          };
+
+         return utilRebind(drawWay, dispatch, 'on');
        }
 
-       function uiNoteComments() {
-         var _note;
+       function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
+         var mode = {
+           button: button,
+           id: 'draw-line'
+         };
+         var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawLine', function () {
+           context.ui().flash.iconName('#iD-icon-no').label(_t.html('self_intersection.error.lines'))();
+         });
+         mode.wayID = wayID;
+         mode.isContinuing = continuing;
 
-         function noteComments(selection) {
-           if (_note.isNew()) return; // don't draw .comments-container
+         mode.enter = function () {
+           behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
+           context.install(behavior);
+         };
 
-           var comments = selection.selectAll('.comments-container').data([0]);
-           comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments);
-           var commentEnter = comments.selectAll('.comment').data(_note.comments).enter().append('div').attr('class', 'comment');
-           commentEnter.append('div').attr('class', function (d) {
-             return 'comment-avatar user-' + d.uid;
-           }).call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
-           var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
-           var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
-           metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
-             var selection = select(this);
-             var osm = services.osm;
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-             if (osm && d.user) {
-               selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
-             }
+         mode.selectedIDs = function () {
+           return [wayID];
+         };
 
-             selection.html(function (d) {
-               return d.user || _t.html('note.anonymous');
-             });
-           });
-           metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
-             return _t('note.status.' + d.action, {
-               when: localeDateString(d.date)
-             });
-           });
-           mainEnter.append('div').attr('class', 'comment-text').html(function (d) {
-             return d.html;
-           }).selectAll('a').attr('rel', 'noopener nofollow').attr('target', '_blank');
-           comments.call(replaceAvatars);
-         }
+         mode.activeID = function () {
+           return behavior && behavior.activeID() || [];
+         };
 
-         function replaceAvatars(selection) {
-           var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
-           var osm = services.osm;
-           if (showThirdPartyIcons !== 'true' || !osm) return;
-           var uids = {}; // gather uids in the comment thread
+         return mode;
+       }
 
-           _note.comments.forEach(function (d) {
-             if (d.uid) uids[d.uid] = true;
-           });
+       function validationDisconnectedWay() {
+         var type = 'disconnected_way';
 
-           Object.keys(uids).forEach(function (uid) {
-             osm.loadUser(uid, function (err, user) {
-               if (!user || !user.image_url) return;
-               selection.selectAll('.comment-avatar.user-' + uid).html('').append('img').attr('class', 'icon comment-avatar-icon').attr('src', user.image_url).attr('alt', user.display_name);
-             });
-           });
+         function isTaggedAsHighway(entity) {
+           return osmRoutableHighwayTagValues[entity.tags.highway];
          }
 
-         function localeDateString(s) {
-           if (!s) return null;
-           var options = {
-             day: 'numeric',
-             month: 'short',
-             year: 'numeric'
-           };
-           s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
+         var validation = function checkDisconnectedWay(entity, graph) {
+           var routingIslandWays = routingIslandForEntity(entity);
+           if (!routingIslandWays) return [];
+           return [new validationIssue({
+             type: type,
+             subtype: 'highway',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = this.entityIds.length && context.hasEntity(this.entityIds[0]);
+               var label = entity && utilDisplayLabel(entity, context.graph());
+               return _t.html('issues.disconnected_way.routable.message', {
+                 count: this.entityIds.length,
+                 highway: label
+               });
+             },
+             reference: showReference,
+             entityIds: Array.from(routingIslandWays).map(function (way) {
+               return way.id;
+             }),
+             dynamicFixes: makeFixes
+           })];
 
-           var d = new Date(s);
-           if (isNaN(d.getTime())) return null;
-           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-         }
+           function makeFixes(context) {
+             var fixes = [];
+             var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
 
-         noteComments.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteComments;
-         };
+             if (singleEntity) {
+               if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
+                 var textDirection = _mainLocalizer.textDirection();
+                 var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
+                 if (startFix) fixes.push(startFix);
+                 var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
+                 if (endFix) fixes.push(endFix);
+               }
 
-         return noteComments;
-       }
+               if (!fixes.length) {
+                 fixes.push(new validationIssueFix({
+                   title: _t.html('issues.fix.connect_feature.title')
+                 }));
+               }
 
-       function uiNoteHeader() {
-         var _note;
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.delete_feature.title'),
+                 entityIds: [singleEntity.id],
+                 onClick: function onClick(context) {
+                   var id = this.issue.entityIds[0];
+                   var operation = operationDelete(context, [id]);
 
-         function noteHeader(selection) {
-           var header = selection.selectAll('.note-header').data(_note ? [_note] : [], function (d) {
-             return d.status + d.id;
-           });
-           header.exit().remove();
-           var headerEnter = header.enter().append('div').attr('class', 'note-header');
-           var iconEnter = headerEnter.append('div').attr('class', function (d) {
-             return 'note-header-icon ' + d.status;
-           }).classed('new', function (d) {
-             return d.id < 0;
-           });
-           iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-note', 'note-fill'));
-           iconEnter.each(function (d) {
-             var statusIcon = '#iD-icon-' + (d.id < 0 ? 'plus' : d.status === 'open' ? 'close' : 'apply');
-             iconEnter.append('div').attr('class', 'note-icon-annotation').call(svgIcon(statusIcon, 'icon-annotation'));
-           });
-           headerEnter.append('div').attr('class', 'note-header-label').html(function (d) {
-             if (_note.isNew()) {
-               return _t('note.new');
+                   if (!operation.disabled()) {
+                     operation();
+                   }
+                 }
+               }));
+             } else {
+               fixes.push(new validationIssueFix({
+                 title: _t.html('issues.fix.connect_features.title')
+               }));
              }
 
-             return _t('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t('note.closed') : '');
-           });
-         }
+             return fixes;
+           }
 
-         noteHeader.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteHeader;
-         };
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.disconnected_way.routable.reference'));
+           }
 
-         return noteHeader;
-       }
+           function routingIslandForEntity(entity) {
+             var routingIsland = new Set(); // the interconnected routable features
 
-       function uiNoteReport() {
-         var _note;
+             var waysToCheck = []; // the queue of remaining routable ways to traverse
 
-         function noteReport(selection) {
-           var url;
+             function queueParentWays(node) {
+               graph.parentWays(node).forEach(function (parentWay) {
+                 if (!routingIsland.has(parentWay) && // only check each feature once
+                 isRoutableWay(parentWay, false)) {
+                   // only check routable features
+                   routingIsland.add(parentWay);
+                   waysToCheck.push(parentWay);
+                 }
+               });
+             }
 
-           if (services.osm && _note instanceof osmNote && !_note.isNew()) {
-             url = services.osm.noteReportURL(_note);
-           }
+             if (entity.type === 'way' && isRoutableWay(entity, true)) {
+               routingIsland.add(entity);
+               waysToCheck.push(entity);
+             } else if (entity.type === 'node' && isRoutableNode(entity)) {
+               routingIsland.add(entity);
+               queueParentWays(entity);
+             } else {
+               // this feature isn't routable, cannot be a routing island
+               return null;
+             }
 
-           var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
+             while (waysToCheck.length) {
+               var wayToCheck = waysToCheck.pop();
+               var childNodes = graph.childNodes(wayToCheck);
 
-           link.exit().remove(); // enter
+               for (var i in childNodes) {
+                 var vertex = childNodes[i];
 
-           var linkEnter = link.enter().append('a').attr('class', 'note-report').attr('target', '_blank').attr('href', function (d) {
-             return d;
-           }).call(svgIcon('#iD-icon-out-link', 'inline'));
-           linkEnter.append('span').html(_t.html('note.report'));
-         }
+                 if (isConnectedVertex(vertex)) {
+                   // found a link to the wider network, not a routing island
+                   return null;
+                 }
 
-         noteReport.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteReport;
-         };
+                 if (isRoutableNode(vertex)) {
+                   routingIsland.add(vertex);
+                 }
 
-         return noteReport;
-       }
+                 queueParentWays(vertex);
+               }
+             } // no network link found, this is a routing island, return its members
 
-       function uiViewOnOSM(context) {
-         var _what; // an osmEntity or osmNote
 
+             return routingIsland;
+           }
 
-         function viewOnOSM(selection) {
-           var url;
+           function isConnectedVertex(vertex) {
+             // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
+             var osm = services.osm;
+             if (osm && !osm.isDataLoaded(vertex.loc)) return true; // entrances are considered connected
 
-           if (_what instanceof osmEntity) {
-             url = context.connection().entityURL(_what);
-           } else if (_what instanceof osmNote) {
-             url = context.connection().noteURL(_what);
+             if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
+             if (vertex.tags.amenity === 'parking_entrance') return true;
+             return false;
            }
 
-           var data = !_what || _what.isNew() ? [] : [_what];
-           var link = selection.selectAll('.view-on-osm').data(data, function (d) {
-             return d.id;
-           }); // exit
+           function isRoutableNode(node) {
+             // treat elevators as distinct features in the highway network
+             if (node.tags.highway === 'elevator') return true;
+             return false;
+           }
 
-           link.exit().remove(); // enter
+           function isRoutableWay(way, ignoreInnerWays) {
+             if (isTaggedAsHighway(way) || way.tags.route === 'ferry') return true;
+             return graph.parentRelations(way).some(function (parentRelation) {
+               if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true;
+               if (parentRelation.isMultipolygon() && isTaggedAsHighway(parentRelation) && (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) return true;
+               return false;
+             });
+           }
 
-           var linkEnter = link.enter().append('a').attr('class', 'view-on-osm').attr('target', '_blank').attr('href', url).call(svgIcon('#iD-icon-out-link', 'inline'));
-           linkEnter.append('span').html(_t.html('inspector.view_on_osm'));
-         }
+           function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
+             var vertex = graph.hasEntity(vertexID);
+             if (!vertex || vertex.tags.noexit === 'yes') return null;
+             var useLeftContinue = whichEnd === 'start' && textDirection === 'ltr' || whichEnd === 'end' && textDirection === 'rtl';
+             return new validationIssueFix({
+               icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+               title: _t.html('issues.fix.continue_from_' + whichEnd + '.title'),
+               entityIds: [vertexID],
+               onClick: function onClick(context) {
+                 var wayId = this.issue.entityIds[0];
+                 var way = context.hasEntity(wayId);
+                 var vertexId = this.entityIds[0];
+                 var vertex = context.hasEntity(vertexId);
+                 if (!way || !vertex) return; // make sure the vertex is actually visible and editable
 
-         viewOnOSM.what = function (_) {
-           if (!arguments.length) return _what;
-           _what = _;
-           return viewOnOSM;
-         };
+                 var map = context.map();
 
-         return viewOnOSM;
-       }
+                 if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+                   map.zoomToEase(vertex);
+                 }
 
-       function uiNoteEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var noteComments = uiNoteComments();
-         var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
+                 context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
+               }
+             });
+           }
+         };
 
-         var _note;
+         validation.type = type;
+         return validation;
+       }
 
-         var _newNote; // var _fieldsArr;
+       function validationFormatting() {
+         var type = 'invalid_format';
 
+         var validation = function validation(entity) {
+           var issues = [];
 
-         function noteEditor(selection) {
-           var header = selection.selectAll('.header').data([0]);
-           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
-           headerEnter.append('button').attr('class', 'close').on('click', function () {
-             context.enter(modeBrowse(context));
-           }).call(svgIcon('#iD-icon-close'));
-           headerEnter.append('h3').html(_t.html('note.title'));
-           var body = selection.selectAll('.body').data([0]);
-           body = body.enter().append('div').attr('class', 'body').merge(body);
-           var editor = body.selectAll('.note-editor').data([0]);
-           editor.enter().append('div').attr('class', 'modal-section note-editor').merge(editor).call(noteHeader.note(_note)).call(noteComments.note(_note)).call(noteSaveSection);
-           var footer = selection.selectAll('.footer').data([0]);
-           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOSM(context).what(_note)).call(uiNoteReport().note(_note)); // rerender the note editor on any auth change
+           function isValidEmail(email) {
+             // Emails in OSM are going to be official so they should be pretty simple
+             // Using negated lists to better support all possible unicode characters (#6494)
+             var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i; // An empty value is also acceptable
 
-           var osm = services.osm;
+             return !email || valid_email.test(email);
+           }
 
-           if (osm) {
-             osm.on('change.note-save', function () {
-               selection.call(noteEditor);
-             });
+           function showReferenceEmail(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.invalid_format.email.reference'));
            }
-         }
+           /* see https://github.com/openstreetmap/iD/issues/6831#issuecomment-537121379
+           function isSchemePresent(url) {
+               var valid_scheme = /^https?:\/\//i;
+               return (!url || valid_scheme.test(url));
+           }
+           function showReferenceWebsite(selection) {
+               selection.selectAll('.issue-reference')
+                   .data([0])
+                   .enter()
+                   .append('div')
+                   .attr('class', 'issue-reference')
+                   .call(t.append('issues.invalid_format.website.reference'));
+           }
+            if (entity.tags.website) {
+               // Multiple websites are possible
+               // If ever we support ES6, arrow functions make this nicer
+               var websites = entity.tags.website
+                   .split(';')
+                   .map(function(s) { return s.trim(); })
+                   .filter(function(x) { return !isSchemePresent(x); });
+                if (websites.length) {
+                   issues.push(new validationIssue({
+                       type: type,
+                       subtype: 'website',
+                       severity: 'warning',
+                       message: function(context) {
+                           var entity = context.hasEntity(this.entityIds[0]);
+                           return entity ? t.html('issues.invalid_format.website.message' + this.data,
+                               { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
+                       },
+                       reference: showReferenceWebsite,
+                       entityIds: [entity.id],
+                       hash: websites.join(),
+                       data: (websites.length > 1) ? '_multi' : ''
+                   }));
+               }
+           }*/
 
-         function noteSaveSection(selection) {
-           var isSelected = _note && _note.id === context.selectedNoteID();
 
-           var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+           if (entity.tags.email) {
+             // Multiple emails are possible
+             var emails = entity.tags.email.split(';').map(function (s) {
+               return s.trim();
+             }).filter(function (x) {
+               return !isValidEmail(x);
+             });
 
-           noteSave.exit().remove(); // enter
+             if (emails.length) {
+               issues.push(new validationIssue({
+                 type: type,
+                 subtype: 'email',
+                 severity: 'warning',
+                 message: function message(context) {
+                   var entity = context.hasEntity(this.entityIds[0]);
+                   return entity ? _t.html('issues.invalid_format.email.message' + this.data, {
+                     feature: utilDisplayLabel(entity, context.graph()),
+                     email: emails.join(', ')
+                   }) : '';
+                 },
+                 reference: showReferenceEmail,
+                 entityIds: [entity.id],
+                 hash: emails.join(),
+                 data: emails.length > 1 ? '_multi' : ''
+               }));
+             }
+           }
 
-           var noteSaveEnter = noteSave.enter().append('div').attr('class', 'note-save save-section cf'); // // if new note, show categories to pick from
-           // if (_note.isNew()) {
-           //     var presets = presetManager;
-           //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
-           //     _fieldsArr = [
-           //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
-           //     ];
-           //     _fieldsArr.forEach(function(field) {
-           //         field
-           //             .on('change', changeCategory);
-           //     });
-           //     noteSaveEnter
-           //         .append('div')
-           //         .attr('class', 'note-category')
-           //         .call(formFields.fieldsArr(_fieldsArr));
-           // }
-           // function changeCategory() {
-           //     // NOTE: perhaps there is a better way to get value
-           //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
-           //     // store the unsaved category with the note itself
-           //     _note = _note.update({ newCategory: val });
-           //     var osm = services.osm;
-           //     if (osm) {
-           //         osm.replaceNote(_note);  // update note cache
-           //     }
-           //     noteSave
-           //         .call(noteSaveButtons);
-           // }
+           return issues;
+         };
 
-           noteSaveEnter.append('h4').attr('class', '.note-save-header').html(function () {
-             return _note.isNew() ? _t('note.newDescription') : _t('note.newComment');
-           });
-           var commentTextarea = noteSaveEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('note.inputPlaceholder')).attr('maxlength', 1000).property('value', function (d) {
-             return d.newComment;
-           }).call(utilNoAuto).on('keydown.note-input', keydown).on('input.note-input', changeInput).on('blur.note-input', changeInput);
+         validation.type = type;
+         return validation;
+       }
 
-           if (!commentTextarea.empty() && _newNote) {
-             // autofocus the comment field for new notes
-             commentTextarea.node().focus();
-           } // update
+       function validationHelpRequest(context) {
+         var type = 'help_request';
 
+         var validation = function checkFixmeTag(entity) {
+           if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
 
-           noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
+           if (entity.version === undefined) return [];
 
-           function keydown(d3_event) {
-             if (!(d3_event.keyCode === 13 && // ↩ Return
-             d3_event.metaKey)) return;
-             var osm = services.osm;
-             if (!osm) return;
-             var hasAuth = osm.authenticated();
-             if (!hasAuth) return;
-             if (!_note.newComment) return;
-             d3_event.preventDefault();
-             select(this).on('keydown.note-input', null); // focus on button and submit
+           if (entity.v !== undefined) {
+             var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features
 
-             window.setTimeout(function () {
-               if (_note.isNew()) {
-                 noteSave.selectAll('.save-button').node().focus();
-                 clickSave();
-               } else {
-                 noteSave.selectAll('.comment-button').node().focus();
-                 clickComment();
-               }
-             }, 10);
+             if (!baseEntity || !baseEntity.tags.fixme) return [];
            }
 
-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
+           return [new validationIssue({
+             type: type,
+             subtype: 'fixme_tag',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.fixme_tag.message', {
+                 feature: utilDisplayLabel(entity, context.graph(), true
+                 /* verbose */
+                 )
+               }) : '';
+             },
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 title: _t.html('issues.fix.address_the_concern.title')
+               })];
+             },
+             reference: showReference,
+             entityIds: [entity.id]
+           })];
 
-             _note = _note.update({
-               newComment: val
-             });
-             var osm = services.osm;
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.fixme_tag.reference'));
+           }
+         };
 
-             if (osm) {
-               osm.replaceNote(_note); // update note cache
-             }
+         validation.type = type;
+         return validation;
+       }
 
-             noteSave.call(noteSaveButtons);
-           }
-         }
+       function validationImpossibleOneway() {
+         var type = 'impossible_oneway';
 
-         function userDetails(selection) {
-           var detailSection = selection.selectAll('.detail-section').data([0]);
-           detailSection = detailSection.enter().append('div').attr('class', 'detail-section').merge(detailSection);
-           var osm = services.osm;
-           if (!osm) return; // Add warning if user is not logged in
+         var validation = function checkImpossibleOneway(entity, graph) {
+           if (entity.type !== 'way' || entity.geometry(graph) !== 'line') return [];
+           if (entity.isClosed()) return [];
+           if (!typeForWay(entity)) return [];
+           if (!isOneway(entity)) return [];
+           var firstIssues = issuesForNode(entity, entity.first());
+           var lastIssues = issuesForNode(entity, entity.last());
+           return firstIssues.concat(lastIssues);
 
-           var hasAuth = osm.authenticated();
-           var authWarning = detailSection.selectAll('.auth-warning').data(hasAuth ? [] : [0]);
-           authWarning.exit().transition().duration(200).style('opacity', 0).remove();
-           var authEnter = authWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning auth-warning').style('opacity', 0);
-           authEnter.call(svgIcon('#iD-icon-alert', 'inline'));
-           authEnter.append('span').html(_t.html('note.login'));
-           authEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.note-login', function (d3_event) {
-             d3_event.preventDefault();
-             osm.authenticate();
-           });
-           authEnter.transition().duration(200).style('opacity', 1);
-           var prose = detailSection.selectAll('.note-save-prose').data(hasAuth ? [0] : []);
-           prose.exit().remove();
-           prose = prose.enter().append('p').attr('class', 'note-save-prose').html(_t.html('note.upload_explanation')).merge(prose);
-           osm.userDetails(function (err, user) {
-             if (err) return;
-             var userLink = select(document.createElement('div'));
+           function typeForWay(way) {
+             if (way.geometry(graph) !== 'line') return null;
+             if (osmRoutableHighwayTagValues[way.tags.highway]) return 'highway';
+             if (osmFlowingWaterwayTagValues[way.tags.waterway]) return 'waterway';
+             return null;
+           }
 
-             if (user.image_url) {
-               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+           function isOneway(way) {
+             if (way.tags.oneway === 'yes') return true;
+             if (way.tags.oneway) return false;
+
+             for (var key in way.tags) {
+               if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
+                 return true;
+               }
              }
 
-             userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
-             prose.html(_t.html('note.upload_explanation_with_user', {
-               user: userLink.html()
-             }));
-           });
-         }
+             return false;
+           }
 
-         function noteSaveButtons(selection) {
-           var osm = services.osm;
-           var hasAuth = osm && osm.authenticated();
+           function nodeOccursMoreThanOnce(way, nodeID) {
+             var occurrences = 0;
 
-           var isSelected = _note && _note.id === context.selectedNoteID();
+             for (var index in way.nodes) {
+               if (way.nodes[index] === nodeID) {
+                 occurrences += 1;
+                 if (occurrences > 1) return true;
+               }
+             }
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+             return false;
+           }
 
-           buttonSection.exit().remove(); // enter
+           function isConnectedViaOtherTypes(way, node) {
+             var wayType = typeForWay(way);
 
-           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+             if (wayType === 'highway') {
+               // entrances are considered connected
+               if (node.tags.entrance && node.tags.entrance !== 'no') return true;
+               if (node.tags.amenity === 'parking_entrance') return true;
+             } else if (wayType === 'waterway') {
+               if (node.id === way.first()) {
+                 // multiple waterways may start at the same spring
+                 if (node.tags.natural === 'spring') return true;
+               } else {
+                 // multiple waterways may end at the same drain
+                 if (node.tags.manhole === 'drain') return true;
+               }
+             }
 
-           if (_note.isNew()) {
-             buttonEnter.append('button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
-             buttonEnter.append('button').attr('class', 'button save-button action').html(_t.html('note.save'));
-           } else {
-             buttonEnter.append('button').attr('class', 'button status-button action');
-             buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('note.comment'));
-           } // update
+             return graph.parentWays(node).some(function (parentWay) {
+               if (parentWay.id === way.id) return false;
 
+               if (wayType === 'highway') {
+                 // allow connections to highway areas
+                 if (parentWay.geometry(graph) === 'area' && osmRoutableHighwayTagValues[parentWay.tags.highway]) return true; // count connections to ferry routes as connected
 
-           buttonSection = buttonSection.merge(buttonEnter);
-           buttonSection.select('.cancel-button') // select and propagate data
-           .on('click.cancel', clickCancel);
-           buttonSection.select('.save-button') // select and propagate data
-           .attr('disabled', isSaveDisabled).on('click.save', clickSave);
-           buttonSection.select('.status-button') // select and propagate data
-           .attr('disabled', hasAuth ? null : true).html(function (d) {
-             var action = d.status === 'open' ? 'close' : 'open';
-             var andComment = d.newComment ? '_comment' : '';
-             return _t('note.' + action + andComment);
-           }).on('click.status', clickStatus);
-           buttonSection.select('.comment-button') // select and propagate data
-           .attr('disabled', isSaveDisabled).on('click.comment', clickComment);
+                 if (parentWay.tags.route === 'ferry') return true;
+                 return graph.parentRelations(parentWay).some(function (parentRelation) {
+                   if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true; // allow connections to highway multipolygons
 
-           function isSaveDisabled(d) {
-             return hasAuth && d.status === 'open' && d.newComment ? null : true;
+                   return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
+                 });
+               } else if (wayType === 'waterway') {
+                 // multiple waterways may start or end at a water body at the same node
+                 if (parentWay.tags.natural === 'water' || parentWay.tags.natural === 'coastline') return true;
+               }
+
+               return false;
+             });
            }
-         }
 
-         function clickCancel(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
+           function issuesForNode(way, nodeID) {
+             var isFirst = nodeID === way.first();
+             var wayType = typeForWay(way); // ignore if this way is self-connected at this node
 
-           var osm = services.osm;
+             if (nodeOccursMoreThanOnce(way, nodeID)) return [];
+             var osm = services.osm;
+             if (!osm) return [];
+             var node = graph.hasEntity(nodeID); // ignore if this node or its tile are unloaded
 
-           if (osm) {
-             osm.removeNote(d);
-           }
+             if (!node || !osm.isDataLoaded(node.loc)) return [];
+             if (isConnectedViaOtherTypes(way, node)) return [];
+             var attachedWaysOfSameType = graph.parentWays(node).filter(function (parentWay) {
+               if (parentWay.id === way.id) return false;
+               return typeForWay(parentWay) === wayType;
+             }); // assume it's okay for waterways to start or end disconnected for now
 
-           context.enter(modeBrowse(context));
-           dispatch$1.call('change');
-         }
+             if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) return [];
+             var attachedOneways = attachedWaysOfSameType.filter(function (attachedWay) {
+               return isOneway(attachedWay);
+             }); // ignore if the way is connected to some non-oneway features
 
-         function clickSave(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
+             if (attachedOneways.length < attachedWaysOfSameType.length) return [];
 
-           var osm = services.osm;
+             if (attachedOneways.length) {
+               var connectedEndpointsOkay = attachedOneways.some(function (attachedOneway) {
+                 if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) return true;
+                 if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) return true;
+                 return false;
+               });
+               if (connectedEndpointsOkay) return [];
+             }
 
-           if (osm) {
-             osm.postNoteCreate(d, function (err, note) {
-               dispatch$1.call('change', note);
-             });
-           }
-         }
+             var placement = isFirst ? 'start' : 'end',
+                 messageID = wayType + '.',
+                 referenceID = wayType + '.';
 
-         function clickStatus(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
+             if (wayType === 'waterway') {
+               messageID += 'connected.' + placement;
+               referenceID += 'connected';
+             } else {
+               messageID += placement;
+               referenceID += placement;
+             }
 
-           var osm = services.osm;
+             return [new validationIssue({
+               type: type,
+               subtype: wayType,
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.impossible_oneway.' + messageID + '.message', {
+                   feature: utilDisplayLabel(entity, context.graph())
+                 }) : '';
+               },
+               reference: getReference(referenceID),
+               entityIds: [way.id, node.id],
+               dynamicFixes: function dynamicFixes() {
+                 var fixes = [];
 
-           if (osm) {
-             var setStatus = d.status === 'open' ? 'closed' : 'open';
-             osm.postNoteUpdate(d, setStatus, function (err, note) {
-               dispatch$1.call('change', note);
-             });
-           }
-         }
+                 if (attachedOneways.length) {
+                   fixes.push(new validationIssueFix({
+                     icon: 'iD-operation-reverse',
+                     title: _t.html('issues.fix.reverse_feature.title'),
+                     entityIds: [way.id],
+                     onClick: function onClick(context) {
+                       var id = this.issue.entityIds[0];
+                       context.perform(actionReverse(id), _t('operations.reverse.annotation.line', {
+                         n: 1
+                       }));
+                     }
+                   }));
+                 }
 
-         function clickComment(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button - #4641
+                 if (node.tags.noexit !== 'yes') {
+                   var textDirection = _mainLocalizer.textDirection();
+                   var useLeftContinue = isFirst && textDirection === 'ltr' || !isFirst && textDirection === 'rtl';
+                   fixes.push(new validationIssueFix({
+                     icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
+                     title: _t.html('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
+                     onClick: function onClick(context) {
+                       var entityID = this.issue.entityIds[0];
+                       var vertexID = this.issue.entityIds[1];
+                       var way = context.entity(entityID);
+                       var vertex = context.entity(vertexID);
+                       continueDrawing(way, vertex, context);
+                     }
+                   }));
+                 }
 
-           var osm = services.osm;
+                 return fixes;
+               },
+               loc: node.loc
+             })];
 
-           if (osm) {
-             osm.postNoteUpdate(d, d.status, function (err, note) {
-               dispatch$1.call('change', note);
-             });
+             function getReference(referenceID) {
+               return function showReference(selection) {
+                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.impossible_oneway.' + referenceID + '.reference'));
+               };
+             }
            }
-         }
-
-         noteEditor.note = function (val) {
-           if (!arguments.length) return _note;
-           _note = val;
-           return noteEditor;
          };
 
-         noteEditor.newNote = function (val) {
-           if (!arguments.length) return _newNote;
-           _newNote = val;
-           return noteEditor;
-         };
+         function continueDrawing(way, vertex, context) {
+           // make sure the vertex is actually visible and editable
+           var map = context.map();
+
+           if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
+             map.zoomToEase(vertex);
+           }
+
+           context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+         }
 
-         return utilRebind(noteEditor, dispatch$1, 'on');
+         validation.type = type;
+         return validation;
        }
 
-       function modeSelectNote(context, selectedNoteID) {
-         var mode = {
-           id: 'select-note',
-           button: 'browse'
-         };
+       function validationIncompatibleSource() {
+         var type = 'incompatible_source';
+         var incompatibleRules = [{
+           id: 'amap',
+           regex: /(^amap$|^amap\.com|autonavi|mapabc|高德)/i
+         }, {
+           id: 'baidu',
+           regex: /(baidu|mapbar|百度)/i
+         }, {
+           id: 'google',
+           regex: /google/i,
+           exceptRegex: /((books|drive)\.google|google\s?(books|drive|plus))|(esri\/Google_Africa_Buildings)/i
+         }];
 
-         var _keybinding = utilKeybinding('select-note');
+         var validation = function checkIncompatibleSource(entity) {
+           var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
+           if (!entitySources) return [];
+           var entityID = entity.id;
+           return entitySources.map(function (source) {
+             var matchRule = incompatibleRules.find(function (rule) {
+               if (!rule.regex.test(source)) return false;
+               if (rule.exceptRegex && rule.exceptRegex.test(source)) return false;
+               return true;
+             });
+             if (!matchRule) return null;
+             return new validationIssue({
+               type: type,
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(entityID);
+                 return entity ? _t.html('issues.incompatible_source.feature.message', {
+                   feature: utilDisplayLabel(entity, context.graph(), true
+                   /* verbose */
+                   ),
+                   value: source
+                 }) : '';
+               },
+               reference: getReference(matchRule.id),
+               entityIds: [entityID],
+               hash: source,
+               dynamicFixes: function dynamicFixes() {
+                 return [new validationIssueFix({
+                   title: _t.html('issues.fix.remove_proprietary_data.title')
+                 })];
+               }
+             });
+           }).filter(Boolean);
 
-         var _noteEditor = uiNoteEditor(context).on('change', function () {
-           context.map().pan([0, 0]); // trigger a redraw
+           function getReference(id) {
+             return function showReference(selection) {
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append("issues.incompatible_source.reference.".concat(id)));
+             };
+           }
+         };
 
-           var note = checkSelectedID();
-           if (!note) return;
-           context.ui().sidebar.show(_noteEditor.note(note));
-         });
+         validation.type = type;
+         return validation;
+       }
 
-         var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
-         var _newFeature = false;
+       function validationMaprules() {
+         var type = 'maprules';
 
-         function checkSelectedID() {
-           if (!services.osm) return;
-           var note = services.osm.getNote(selectedNoteID);
+         var validation = function checkMaprules(entity, graph) {
+           if (!services.maprules) return [];
+           var rules = services.maprules.validationRules();
+           var issues = [];
 
-           if (!note) {
-             context.enter(modeBrowse(context));
+           for (var i = 0; i < rules.length; i++) {
+             var rule = rules[i];
+             rule.findIssues(entity, graph, issues);
            }
 
-           return note;
-         } // class the note as selected, or return to browse mode if the note is gone
+           return issues;
+         };
 
+         validation.type = type;
+         return validation;
+       }
 
-         function selectNote(d3_event, drawn) {
-           if (!checkSelectedID()) return;
-           var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
+       function validationMismatchedGeometry() {
+         var type = 'mismatched_geometry';
 
-           if (selection.empty()) {
-             // Return to browse mode if selected DOM elements have
-             // disappeared because the user moved them out of view..
-             var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
+         function tagSuggestingLineIsArea(entity) {
+           if (entity.type !== 'way' || entity.isClosed()) return null;
+           var tagSuggestingArea = entity.tagSuggestingArea();
 
-             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-               context.enter(modeBrowse(context));
-             }
-           } else {
-             selection.classed('selected', true);
-             context.selectedNoteID(selectedNoteID);
+           if (!tagSuggestingArea) {
+             return null;
            }
-         }
 
-         function esc() {
-           if (context.container().select('.combobox').size()) return;
-           context.enter(modeBrowse(context));
+           var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
+           var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
+
+           if (asLine && asArea && asLine === asArea) {
+             // these tags also allow lines and making this an area wouldn't matter
+             return null;
+           }
+
+           return tagSuggestingArea;
          }
 
-         mode.zoomToSelected = function () {
-           if (!services.osm) return;
-           var note = services.osm.getNote(selectedNoteID);
+         function makeConnectEndpointsFixOnClick(way, graph) {
+           // must have at least three nodes to close this automatically
+           if (way.nodes.length < 3) return null;
+           var nodes = graph.childNodes(way),
+               testNodes;
+           var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length - 1].loc); // if the distance is very small, attempt to merge the endpoints
 
-           if (note) {
-             context.map().centerZoomEase(note.loc, 20);
-           }
-         };
+           if (firstToLastDistanceMeters < 0.75) {
+             testNodes = nodes.slice(); // shallow copy
 
-         mode.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return mode;
-         };
+             testNodes.pop();
+             testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-         mode.enter = function () {
-           var note = checkSelectedID();
-           if (!note) return;
+             if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+               return function (context) {
+                 var way = context.entity(this.issue.entityIds[0]);
+                 context.perform(actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length - 1]], nodes[0].loc), _t('issues.fix.connect_endpoints.annotation'));
+               };
+             }
+           } // if the points were not merged, attempt to close the way
 
-           _behaviors.forEach(context.install);
 
-           _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+           testNodes = nodes.slice(); // shallow copy
 
-           select(document).call(_keybinding);
-           selectNote();
-           var sidebar = context.ui().sidebar;
-           sidebar.show(_noteEditor.note(note).newNote(_newFeature)); // expand the sidebar, avoid obscuring the note if needed
+           testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
 
-           sidebar.expand(sidebar.intersects(note.extent()));
-           context.map().on('drawn.select', selectNote);
-         };
+           if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
+             return function (context) {
+               var wayId = this.issue.entityIds[0];
+               var way = context.entity(wayId);
+               var nodeId = way.nodes[0];
+               var index = way.nodes.length;
+               context.perform(actionAddVertex(wayId, nodeId, index), _t('issues.fix.connect_endpoints.annotation'));
+             };
+           }
+         }
 
-         mode.exit = function () {
-           _behaviors.forEach(context.uninstall);
+         function lineTaggedAsAreaIssue(entity) {
+           var tagSuggestingArea = tagSuggestingLineIsArea(entity);
+           if (!tagSuggestingArea) return null;
+           return new validationIssue({
+             type: type,
+             subtype: 'area_as_line',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.tag_suggests_area.message', {
+                 feature: utilDisplayLabel(entity, 'area', true
+                 /* verbose */
+                 ),
+                 tag: utilTagText({
+                   tags: tagSuggestingArea
+                 })
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: [entity.id],
+             hash: JSON.stringify(tagSuggestingArea),
+             dynamicFixes: function dynamicFixes(context) {
+               var fixes = [];
+               var entity = context.entity(this.entityIds[0]);
+               var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
+               fixes.push(new validationIssueFix({
+                 title: _t.html('issues.fix.connect_endpoints.title'),
+                 onClick: connectEndsOnClick
+               }));
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.remove_tag.title'),
+                 onClick: function onClick(context) {
+                   var entityId = this.issue.entityIds[0];
+                   var entity = context.entity(entityId);
+                   var tags = Object.assign({}, entity.tags); // shallow copy
 
-           select(document).call(_keybinding.unbind);
-           context.surface().selectAll('.layer-notes .selected').classed('selected hover', false);
-           context.map().on('drawn.select', null);
-           context.ui().sidebar.hide();
-           context.selectedNoteID(null);
-         };
+                   for (var key in tagSuggestingArea) {
+                     delete tags[key];
+                   }
 
-         return mode;
-       }
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
+                 }
+               }));
+               return fixes;
+             }
+           });
 
-       function modeDragNote(context) {
-         var mode = {
-           id: 'drag-note',
-           button: 'browse'
-         };
-         var edit = behaviorEdit(context);
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.tag_suggests_area.reference'));
+           }
+         }
 
-         var _nudgeInterval;
+         function vertexPointIssue(entity, graph) {
+           // we only care about nodes
+           if (entity.type !== 'node') return null; // ignore tagless points
 
-         var _lastLoc;
+           if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
 
-         var _note; // most current note.. dragged note may have stale datum.
+           if (entity.isOnAddressLine(graph)) return null;
+           var geometry = entity.geometry(graph);
+           var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
 
+           if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
+             return new validationIssue({
+               type: type,
+               subtype: 'vertex_as_point',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.vertex_as_point.message', {
+                   feature: utilDisplayLabel(entity, 'vertex', true
+                   /* verbose */
+                   )
+                 }) : '';
+               },
+               reference: function showReference(selection) {
+                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.vertex_as_point.reference'));
+               },
+               entityIds: [entity.id]
+             });
+           } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
+             return new validationIssue({
+               type: type,
+               subtype: 'point_as_vertex',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.point_as_vertex.message', {
+                   feature: utilDisplayLabel(entity, 'point', true
+                   /* verbose */
+                   )
+                 }) : '';
+               },
+               reference: function showReference(selection) {
+                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.point_as_vertex.reference'));
+               },
+               entityIds: [entity.id],
+               dynamicFixes: extractPointDynamicFixes
+             });
+           }
 
-         function startNudge(d3_event, nudge) {
-           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
-           _nudgeInterval = window.setInterval(function () {
-             context.map().pan(nudge);
-             doMove(d3_event, nudge);
-           }, 50);
+           return null;
          }
 
-         function stopNudge() {
-           if (_nudgeInterval) {
-             window.clearInterval(_nudgeInterval);
-             _nudgeInterval = null;
+         function otherMismatchIssue(entity, graph) {
+           // ignore boring features
+           if (!entity.hasInterestingTags()) return null;
+           if (entity.type !== 'node' && entity.type !== 'way') return null; // address lines are special so just ignore them
+
+           if (entity.type === 'node' && entity.isOnAddressLine(graph)) return null;
+           var sourceGeom = entity.geometry(graph);
+           var targetGeoms = entity.type === 'way' ? ['point', 'vertex'] : ['line', 'area'];
+           if (sourceGeom === 'area') targetGeoms.unshift('line');
+           var asSource = _mainPresetIndex.match(entity, graph);
+           var targetGeom = targetGeoms.find(function (nodeGeom) {
+             var asTarget = _mainPresetIndex.matchTags(entity.tags, nodeGeom);
+             if (!asSource || !asTarget || asSource === asTarget || // sometimes there are two presets with the same tags for different geometries
+             fastDeepEqual(asSource.tags, asTarget.tags)) return false;
+             if (asTarget.isFallback()) return false;
+             var primaryKey = Object.keys(asTarget.tags)[0]; // special case: buildings-as-points are discouraged by iD, but common in OSM, so ignore them
+
+             if (primaryKey === 'building') return false;
+             if (asTarget.tags[primaryKey] === '*') return false;
+             return asSource.isFallback() || asSource.tags[primaryKey] === '*';
+           });
+           if (!targetGeom) return null;
+           var subtype = targetGeom + '_as_' + sourceGeom;
+           if (targetGeom === 'vertex') targetGeom = 'point';
+           if (sourceGeom === 'vertex') sourceGeom = 'point';
+           var referenceId = targetGeom + '_as_' + sourceGeom;
+           var dynamicFixes;
+
+           if (targetGeom === 'point') {
+             dynamicFixes = extractPointDynamicFixes;
+           } else if (sourceGeom === 'area' && targetGeom === 'line') {
+             dynamicFixes = lineToAreaDynamicFixes;
            }
-         }
 
-         function origin(note) {
-           return context.projection(note.loc);
+           return new validationIssue({
+             type: type,
+             subtype: subtype,
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.' + referenceId + '.message', {
+                 feature: utilDisplayLabel(entity, targetGeom, true
+                 /* verbose */
+                 )
+               }) : '';
+             },
+             reference: function showReference(selection) {
+               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.mismatched_geometry.reference'));
+             },
+             entityIds: [entity.id],
+             dynamicFixes: dynamicFixes
+           });
          }
 
-         function start(d3_event, note) {
-           _note = note;
-           var osm = services.osm;
+         function lineToAreaDynamicFixes(context) {
+           var convertOnClick;
+           var entityId = this.entityIds[0];
+           var entity = context.entity(entityId);
+           var tags = Object.assign({}, entity.tags); // shallow copy
 
-           if (osm) {
-             // Get latest note from cache.. The marker may have a stale datum bound to it
-             // and dragging it around can sometimes delete the users note comment.
-             _note = osm.getNote(_note.id);
-           }
+           delete tags.area;
 
-           context.surface().selectAll('.note-' + _note.id).classed('active', true);
-           context.perform(actionNoop());
-           context.enter(mode);
-           context.selectedNoteID(_note.id);
-         }
+           if (!osmTagSuggestingArea(tags)) {
+             // if removing the area tag would make this a line, offer that as a quick fix
+             convertOnClick = function convertOnClick(context) {
+               var entityId = this.issue.entityIds[0];
+               var entity = context.entity(entityId);
+               var tags = Object.assign({}, entity.tags); // shallow copy
 
-         function move(d3_event, entity, point) {
-           d3_event.stopPropagation();
-           _lastLoc = context.projection.invert(point);
-           doMove(d3_event);
-           var nudge = geoViewportEdge(point, context.map().dimensions());
+               if (tags.area) {
+                 delete tags.area;
+               }
 
-           if (nudge) {
-             startNudge(d3_event, nudge);
-           } else {
-             stopNudge();
+               context.perform(actionChangeTags(entityId, tags), _t('issues.fix.convert_to_line.annotation'));
+             };
            }
-         }
 
-         function doMove(d3_event, nudge) {
-           nudge = nudge || [0, 0];
-           var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
-           var currMouse = geoVecSubtract(currPoint, nudge);
-           var loc = context.projection.invert(currMouse);
-           _note = _note.move(loc);
-           var osm = services.osm;
+           return [new validationIssueFix({
+             icon: 'iD-icon-line',
+             title: _t.html('issues.fix.convert_to_line.title'),
+             onClick: convertOnClick
+           })];
+         }
 
-           if (osm) {
-             osm.replaceNote(_note); // update note cache
-           }
+         function extractPointDynamicFixes(context) {
+           var entityId = this.entityIds[0];
+           var extractOnClick = null;
 
-           context.replace(actionNoop()); // trigger redraw
-         }
+           if (!context.hasHiddenConnections(entityId)) {
+             extractOnClick = function extractOnClick(context) {
+               var entityId = this.issue.entityIds[0];
+               var action = actionExtract(entityId, context.projection);
+               context.perform(action, _t('operations.extract.annotation', {
+                 n: 1
+               })); // re-enter mode to trigger updates
 
-         function end() {
-           context.replace(actionNoop()); // trigger redraw
+               context.enter(modeSelect(context, [action.getExtractedNodeID()]));
+             };
+           }
 
-           context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
+           return [new validationIssueFix({
+             icon: 'iD-operation-extract',
+             title: _t.html('issues.fix.extract_point.title'),
+             onClick: extractOnClick
+           })];
          }
 
-         var drag = behaviorDrag().selector('.layer-touch.markers .target.note.new').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
-
-         mode.enter = function () {
-           context.install(edit);
-         };
+         function unclosedMultipolygonPartIssues(entity, graph) {
+           if (entity.type !== 'relation' || !entity.isMultipolygon() || entity.isDegenerate() || // cannot determine issues for incompletely-downloaded relations
+           !entity.isComplete(graph)) return [];
+           var sequences = osmJoinWays(entity.members, graph);
+           var issues = [];
 
-         mode.exit = function () {
-           context.ui().sidebar.hover.cancel();
-           context.uninstall(edit);
-           context.surface().selectAll('.active').classed('active', false);
-           stopNudge();
-         };
+           for (var i in sequences) {
+             var sequence = sequences[i];
+             if (!sequence.nodes) continue;
+             var firstNode = sequence.nodes[0];
+             var lastNode = sequence.nodes[sequence.nodes.length - 1]; // part is closed if the first and last nodes are the same
 
-         mode.behavior = drag;
-         return mode;
-       }
+             if (firstNode === lastNode) continue;
+             var issue = new validationIssue({
+               type: type,
+               subtype: 'unclosed_multipolygon_part',
+               severity: 'warning',
+               message: function message(context) {
+                 var entity = context.hasEntity(this.entityIds[0]);
+                 return entity ? _t.html('issues.unclosed_multipolygon_part.message', {
+                   feature: utilDisplayLabel(entity, context.graph(), true
+                   /* verbose */
+                   )
+                 }) : '';
+               },
+               reference: showReference,
+               loc: sequence.nodes[0].loc,
+               entityIds: [entity.id],
+               hash: sequence.map(function (way) {
+                 return way.id;
+               }).join()
+             });
+             issues.push(issue);
+           }
 
-       function uiDataHeader() {
-         var _datum;
+           return issues;
 
-         function dataHeader(selection) {
-           var header = selection.selectAll('.data-header').data(_datum ? [_datum] : [], function (d) {
-             return d.__featurehash__;
-           });
-           header.exit().remove();
-           var headerEnter = header.enter().append('div').attr('class', 'data-header');
-           var iconEnter = headerEnter.append('div').attr('class', 'data-header-icon');
-           iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-data', 'note-fill'));
-           headerEnter.append('div').attr('class', 'data-header-label').html(_t.html('map_data.layers.custom.title'));
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.unclosed_multipolygon_part.reference'));
+           }
          }
 
-         dataHeader.datum = function (val) {
-           if (!arguments.length) return _datum;
-           _datum = val;
-           return this;
+         var validation = function checkMismatchedGeometry(entity, graph) {
+           var vertexPoint = vertexPointIssue(entity, graph);
+           if (vertexPoint) return [vertexPoint];
+           var lineAsArea = lineTaggedAsAreaIssue(entity);
+           if (lineAsArea) return [lineAsArea];
+           var mismatch = otherMismatchIssue(entity, graph);
+           if (mismatch) return [mismatch];
+           return unclosedMultipolygonPartIssues(entity, graph);
          };
 
-         return dataHeader;
+         validation.type = type;
+         return validation;
        }
 
-       // It is keyed on the `value` of the entry. Data should be an array of objects like:
-       //   [{
-       //       value:   'string value',  // required
-       //       display: 'label html'     // optional
-       //       title:   'hover text'     // optional
-       //       terms:   ['search terms'] // optional
-       //   }, ...]
+       function validationMissingRole() {
+         var type = 'missing_role';
 
-       var _comboHideTimerID;
+         var validation = function checkMissingRole(entity, graph) {
+           var issues = [];
 
-       function uiCombobox(context, klass) {
-         var dispatch$1 = dispatch('accept', 'cancel');
-         var container = context.container();
-         var _suggestions = [];
-         var _data = [];
-         var _fetched = {};
-         var _selected = null;
-         var _canAutocomplete = true;
-         var _caseSensitive = false;
-         var _cancelFetch = false;
-         var _minItems = 2;
-         var _tDown = 0;
+           if (entity.type === 'way') {
+             graph.parentRelations(entity).forEach(function (relation) {
+               if (!relation.isMultipolygon()) return;
+               var member = relation.memberById(entity.id);
 
-         var _mouseEnterHandler, _mouseLeaveHandler;
+               if (member && isMissingRole(member)) {
+                 issues.push(makeIssue(entity, relation, member));
+               }
+             });
+           } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+             entity.indexedMembers().forEach(function (member) {
+               var way = graph.hasEntity(member.id);
 
-         var _fetcher = function _fetcher(val, cb) {
-           cb(_data.filter(function (d) {
-             var terms = d.terms || [];
-             terms.push(d.value);
-             return terms.some(function (term) {
-               return term.toString().toLowerCase().indexOf(val.toLowerCase()) !== -1;
+               if (way && isMissingRole(member)) {
+                 issues.push(makeIssue(way, entity, member));
+               }
              });
-           }));
+           }
+
+           return issues;
          };
 
-         var combobox = function combobox(input, attachTo) {
-           if (!input || input.empty()) return;
-           input.classed('combobox-input', true).on('focus.combo-input', focus).on('blur.combo-input', blur).on('keydown.combo-input', keydown).on('keyup.combo-input', keyup).on('input.combo-input', change).on('mousedown.combo-input', mousedown).each(function () {
-             var parent = this.parentNode;
-             var sibling = this.nextSibling;
-             select(parent).selectAll('.combobox-caret').filter(function (d) {
-               return d === input.node();
-             }).data([input.node()]).enter().insert('div', function () {
-               return sibling;
-             }).attr('class', 'combobox-caret').on('mousedown.combo-caret', function (d3_event) {
-               d3_event.preventDefault(); // don't steal focus from input
+         function isMissingRole(member) {
+           return !member.role || !member.role.trim().length;
+         }
 
-               input.node().focus(); // focus the input as if it was clicked
+         function makeIssue(way, relation, member) {
+           return new validationIssue({
+             type: type,
+             severity: 'warning',
+             message: function message(context) {
+               var member = context.hasEntity(this.entityIds[1]),
+                   relation = context.hasEntity(this.entityIds[0]);
+               return member && relation ? _t.html('issues.missing_role.message', {
+                 member: utilDisplayLabel(member, context.graph()),
+                 relation: utilDisplayLabel(relation, context.graph())
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: [relation.id, way.id],
+             data: {
+               member: member
+             },
+             hash: member.index.toString(),
+             dynamicFixes: function dynamicFixes() {
+               return [makeAddRoleFix('inner'), makeAddRoleFix('outer'), new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.remove_from_relation.title'),
+                 onClick: function onClick(context) {
+                   context.perform(actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index), _t('operations.delete_member.annotation', {
+                     n: 1
+                   }));
+                 }
+               })];
+             }
+           });
 
-               mousedown(d3_event);
-             }).on('mouseup.combo-caret', function (d3_event) {
-               d3_event.preventDefault(); // don't steal focus from input
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.missing_role.multipolygon.reference'));
+           }
+         }
 
-               mouseup(d3_event);
+         function makeAddRoleFix(role) {
+           return new validationIssueFix({
+             title: _t.html('issues.fix.set_as_' + role + '.title'),
+             onClick: function onClick(context) {
+               var oldMember = this.issue.data.member;
+               var member = {
+                 id: this.issue.entityIds[1],
+                 type: oldMember.type,
+                 role: role
+               };
+               context.perform(actionChangeMember(this.issue.entityIds[0], member, oldMember.index), _t('operations.change_role.annotation', {
+                 n: 1
+               }));
+             }
+           });
+         }
+
+         validation.type = type;
+         return validation;
+       }
+
+       function validationMissingTag(context) {
+         var type = 'missing_tag';
+
+         function hasDescriptiveTags(entity, graph) {
+           var onlyAttributeKeys = ['description', 'name', 'note', 'start_date'];
+           var entityDescriptiveKeys = Object.keys(entity.tags).filter(function (k) {
+             if (k === 'area' || !osmIsInterestingTag(k)) return false;
+             return !onlyAttributeKeys.some(function (attributeKey) {
+               return k === attributeKey || k.indexOf(attributeKey + ':') === 0;
              });
            });
 
-           function mousedown(d3_event) {
-             if (d3_event.button !== 0) return; // left click only
+           if (entity.type === 'relation' && entityDescriptiveKeys.length === 1 && entity.tags.type === 'multipolygon') {
+             // this relation's only interesting tag just says its a multipolygon,
+             // which is not descriptive enough
+             // It's okay for a simple multipolygon to have no descriptive tags
+             // if its outer way has them (old model, see `outdated_tags.js`)
+             return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+           }
 
-             _tDown = +new Date(); // clear selection
+           return entityDescriptiveKeys.length > 0;
+         }
 
-             var start = input.property('selectionStart');
-             var end = input.property('selectionEnd');
+         function isUnknownRoad(entity) {
+           return entity.type === 'way' && entity.tags.highway === 'road';
+         }
 
-             if (start !== end) {
-               var val = utilGetSetValue(input);
-               input.node().setSelectionRange(val.length, val.length);
-               return;
+         function isUntypedRelation(entity) {
+           return entity.type === 'relation' && !entity.tags.type;
+         }
+
+         var validation = function checkMissingTag(entity, graph) {
+           var subtype;
+           var osm = context.connection();
+           var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc); // we can't know if the node is a vertex if the tile is undownloaded
+
+           if (!isUnloadedNode && // allow untagged nodes that are part of ways
+           entity.geometry(graph) !== 'vertex' && // allow untagged entities that are part of relations
+           !entity.hasParentRelations(graph)) {
+             if (Object.keys(entity.tags).length === 0) {
+               subtype = 'any';
+             } else if (!hasDescriptiveTags(entity, graph)) {
+               subtype = 'descriptive';
+             } else if (isUntypedRelation(entity)) {
+               subtype = 'relation_type';
              }
+           } // flag an unknown road even if it's a member of a relation
 
-             input.on('mouseup.combo-input', mouseup);
-           }
 
-           function mouseup(d3_event) {
-             input.on('mouseup.combo-input', null);
-             if (d3_event.button !== 0) return; // left click only
+           if (!subtype && isUnknownRoad(entity)) {
+             subtype = 'highway_classification';
+           }
 
-             if (input.node() !== document.activeElement) return; // exit if this input is not focused
+           if (!subtype) return [];
+           var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
+           var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag'; // can always delete if the user created it in the first place..
 
-             var start = input.property('selectionStart');
-             var end = input.property('selectionEnd');
-             if (start !== end) return; // exit if user is selecting
-             // not showing or showing for a different field - try to show it.
+           var canDelete = entity.version === undefined || entity.v !== undefined;
+           var severity = canDelete && subtype !== 'highway_classification' ? 'error' : 'warning';
+           return [new validationIssue({
+             type: type,
+             subtype: subtype,
+             severity: severity,
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.' + messageID + '.message', {
+                 feature: utilDisplayLabel(entity, context.graph())
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: [entity.id],
+             dynamicFixes: function dynamicFixes(context) {
+               var fixes = [];
+               var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-icon-search',
+                 title: _t.html('issues.fix.' + selectFixType + '.title'),
+                 onClick: function onClick(context) {
+                   context.ui().sidebar.showPresetList();
+                 }
+               }));
+               var deleteOnClick;
+               var id = this.entityIds[0];
+               var operation = operationDelete(context, [id]);
+               var disabledReasonID = operation.disabled();
 
-             var combo = container.selectAll('.combobox');
+               if (!disabledReasonID) {
+                 deleteOnClick = function deleteOnClick(context) {
+                   var id = this.issue.entityIds[0];
+                   var operation = operationDelete(context, [id]);
 
-             if (combo.empty() || combo.datum() !== input.node()) {
-               var tOrig = _tDown;
-               window.setTimeout(function () {
-                 if (tOrig !== _tDown) return; // exit if user double clicked
+                   if (!operation.disabled()) {
+                     operation();
+                   }
+                 };
+               }
 
-                 fetchComboData('', function () {
-                   show();
-                   render();
-                 });
-               }, 250);
-             } else {
-               hide();
+               fixes.push(new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.delete_feature.title'),
+                 disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
+                 onClick: deleteOnClick
+               }));
+               return fixes;
              }
-           }
+           })];
 
-           function focus() {
-             fetchComboData(''); // prefetch values (may warm taginfo cache)
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.' + referenceID + '.reference'));
            }
+         };
 
-           function blur() {
-             _comboHideTimerID = window.setTimeout(hide, 75);
-           }
+         validation.type = type;
+         return validation;
+       }
 
-           function show() {
-             hide(); // remove any existing
+       function validationOutdatedTags() {
+         var type = 'outdated_tags';
+         var _waitingForDeprecated = true;
 
-             container.insert('div', ':first-child').datum(input.node()).attr('class', 'combobox' + (klass ? ' combobox-' + klass : '')).style('position', 'absolute').style('display', 'block').style('left', '0px').on('mousedown.combo-container', function (d3_event) {
-               // prevent moving focus out of the input field
-               d3_event.preventDefault();
-             });
-             container.on('scroll.combo-scroll', render, true);
-           }
+         var _dataDeprecated; // fetch deprecated tags
 
-           function hide() {
-             if (_comboHideTimerID) {
-               window.clearTimeout(_comboHideTimerID);
-               _comboHideTimerID = undefined;
-             }
 
-             container.selectAll('.combobox').remove();
-             container.on('scroll.combo-scroll', null);
-           }
+         _mainFileFetcher.get('deprecated').then(function (d) {
+           return _dataDeprecated = d;
+         })["catch"](function () {
+           /* ignore */
+         })["finally"](function () {
+           return _waitingForDeprecated = false;
+         });
 
-           function keydown(d3_event) {
-             var shown = !container.selectAll('.combobox').empty();
-             var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
+         function oldTagIssues(entity, graph) {
+           var oldTags = Object.assign({}, entity.tags); // shallow copy
 
-             switch (d3_event.keyCode) {
-               case 8: // ⌫ Backspace
+           var preset = _mainPresetIndex.match(entity, graph);
+           var subtype = 'deprecated_tags';
+           if (!preset) return [];
+           if (!entity.hasInterestingTags()) return []; // Upgrade preset, if a replacement is available..
 
-               case 46:
-                 // ⌦ Delete
-                 d3_event.stopPropagation();
-                 _selected = null;
-                 render();
-                 input.on('input.combo-input', function () {
-                   var start = input.property('selectionStart');
-                   input.node().setSelectionRange(start, start);
-                   input.on('input.combo-input', change);
-                 });
-                 break;
+           if (preset.replacement) {
+             var newPreset = _mainPresetIndex.item(preset.replacement);
+             graph = actionChangePreset(entity.id, preset, newPreset, true
+             /* skip field defaults */
+             )(graph);
+             entity = graph.entity(entity.id);
+             preset = newPreset;
+           } // Upgrade deprecated tags..
 
-               case 9:
-                 // ⇥ Tab
-                 accept();
-                 break;
 
-               case 13:
-                 // ↩ Return
-                 d3_event.preventDefault();
-                 d3_event.stopPropagation();
-                 break;
+           if (_dataDeprecated) {
+             var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
 
-               case 38:
-                 // ↑ Up arrow
-                 if (tagName === 'textarea' && !shown) return;
-                 d3_event.preventDefault();
+             if (deprecatedTags.length) {
+               deprecatedTags.forEach(function (tag) {
+                 graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
+               });
+               entity = graph.entity(entity.id);
+             }
+           } // Add missing addTags from the detected preset
 
-                 if (tagName === 'input' && !shown) {
-                   show();
+
+           var newTags = Object.assign({}, entity.tags); // shallow copy
+
+           if (preset.tags !== preset.addTags) {
+             Object.keys(preset.addTags).forEach(function (k) {
+               if (!newTags[k]) {
+                 if (preset.addTags[k] === '*') {
+                   newTags[k] = 'yes';
+                 } else {
+                   newTags[k] = preset.addTags[k];
                  }
+               }
+             });
+           } // Attempt to match a canonical record in the name-suggestion-index.
 
-                 nav(-1);
-                 break;
 
-               case 40:
-                 // ↓ Down arrow
-                 if (tagName === 'textarea' && !shown) return;
-                 d3_event.preventDefault();
+           var nsi = services.nsi;
+           var waitingForNsi = false;
+           var nsiResult;
 
-                 if (tagName === 'input' && !shown) {
-                   show();
-                 }
+           if (nsi) {
+             waitingForNsi = nsi.status() === 'loading';
 
-                 nav(+1);
-                 break;
+             if (!waitingForNsi) {
+               var loc = entity.extent(graph).center();
+               nsiResult = nsi.upgradeTags(newTags, loc);
+
+               if (nsiResult) {
+                 newTags = nsiResult.newTags;
+                 subtype = 'noncanonical_brand';
+               }
              }
            }
 
-           function keyup(d3_event) {
-             switch (d3_event.keyCode) {
-               case 27:
-                 // ⎋ Escape
-                 cancel();
-                 break;
+           var issues = [];
+           issues.provisional = _waitingForDeprecated || waitingForNsi; // determine diff
 
-               case 13:
-                 // ↩ Return
-                 accept();
-                 break;
-             }
-           } // Called whenever the input value is changed (e.g. on typing)
+           var tagDiff = utilTagDiff(oldTags, newTags);
+           if (!tagDiff.length) return issues;
+           var isOnlyAddingTags = tagDiff.every(function (d) {
+             return d.type === '+';
+           });
+           var prefix = '';
 
+           if (nsiResult) {
+             prefix = 'noncanonical_brand.';
+           } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
+             subtype = 'incomplete_tags';
+             prefix = 'incomplete.';
+           } // don't allow autofixing brand tags
 
-           function change() {
-             fetchComboData(value(), function () {
-               _selected = null;
-               var val = input.property('value');
 
-               if (_suggestions.length) {
-                 if (input.property('selectionEnd') === val.length) {
-                   _selected = tryAutocomplete();
+           var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
+           issues.push(new validationIssue({
+             type: type,
+             subtype: subtype,
+             severity: 'warning',
+             message: showMessage,
+             reference: showReference,
+             entityIds: [entity.id],
+             hash: utilHashcode(JSON.stringify(tagDiff)),
+             dynamicFixes: function dynamicFixes() {
+               var fixes = [new validationIssueFix({
+                 autoArgs: autoArgs,
+                 title: _t.html('issues.fix.upgrade_tags.title'),
+                 onClick: function onClick(context) {
+                   context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
                  }
+               })];
+               var item = nsiResult && nsiResult.matched;
 
-                 if (!_selected) {
-                   _selected = val;
-                 }
+               if (item) {
+                 fixes.push(new validationIssueFix({
+                   title: _t.html('issues.fix.tag_as_not.title', {
+                     name: item.displayName
+                   }),
+                   onClick: function onClick(context) {
+                     context.perform(addNotTag, _t('issues.fix.tag_as_not.annotation'));
+                   }
+                 }));
                }
 
-               if (val.length) {
-                 var combo = container.selectAll('.combobox');
+               return fixes;
+             }
+           }));
+           return issues;
 
-                 if (combo.empty()) {
-                   show();
-                 }
-               } else {
-                 hide();
-               }
+           function doUpgrade(graph) {
+             var currEntity = graph.hasEntity(entity.id);
+             if (!currEntity) return graph;
+             var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-               render();
+             tagDiff.forEach(function (diff) {
+               if (diff.type === '-') {
+                 delete newTags[diff.key];
+               } else if (diff.type === '+') {
+                 newTags[diff.key] = diff.newVal;
+               }
              });
-           } // Called when the user presses up/down arrows to navigate the list
+             return actionChangeTags(currEntity.id, newTags)(graph);
+           }
 
+           function addNotTag(graph) {
+             var currEntity = graph.hasEntity(entity.id);
+             if (!currEntity) return graph;
+             var item = nsiResult && nsiResult.matched;
+             if (!item) return graph;
+             var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
-           function nav(dir) {
-             if (_suggestions.length) {
-               // try to determine previously selected index..
-               var index = -1;
+             var wd = item.mainTag; // e.g. `brand:wikidata`
 
-               for (var i = 0; i < _suggestions.length; i++) {
-                 if (_selected && _suggestions[i].value === _selected) {
-                   index = i;
-                   break;
-                 }
-               } // pick new _selected
+             var notwd = "not:".concat(wd); // e.g. `not:brand:wikidata`
 
+             var qid = item.tags[wd];
+             newTags[notwd] = qid;
 
-               index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
-               _selected = _suggestions[index].value;
-               input.property('value', _selected);
+             if (newTags[wd] === qid) {
+               // if `brand:wikidata` was set to that qid
+               var wp = item.mainTag.replace('wikidata', 'wikipedia');
+               delete newTags[wd]; // remove `brand:wikidata`
+
+               delete newTags[wp]; // remove `brand:wikipedia`
              }
 
-             render();
-             ensureVisible();
+             return actionChangeTags(currEntity.id, newTags)(graph);
            }
 
-           function ensureVisible() {
-             var combo = container.selectAll('.combobox');
-             if (combo.empty()) return;
-             var containerRect = container.node().getBoundingClientRect();
-             var comboRect = combo.node().getBoundingClientRect();
-
-             if (comboRect.bottom > containerRect.bottom) {
-               var node = attachTo ? attachTo.node() : input.node();
-               node.scrollIntoView({
-                 behavior: 'instant',
-                 block: 'center'
-               });
-               render();
-             } // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move
-
-
-             var selected = combo.selectAll('.combobox-option.selected').node();
+           function showMessage(context) {
+             var currEntity = context.hasEntity(entity.id);
+             if (!currEntity) return '';
+             var messageID = "issues.outdated_tags.".concat(prefix, "message");
 
-             if (selected) {
-               selected.scrollIntoView({
-                 behavior: 'smooth',
-                 block: 'nearest'
-               });
+             if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
+               messageID += '_incomplete';
              }
+
+             return _t.html(messageID, {
+               feature: utilDisplayLabel(currEntity, context.graph(), true
+               /* verbose */
+               )
+             });
            }
 
-           function value() {
-             var value = input.property('value');
-             var start = input.property('selectionStart');
-             var end = input.property('selectionEnd');
+           function showReference(selection) {
+             var enter = selection.selectAll('.issue-reference').data([0]).enter();
+             enter.append('div').attr('class', 'issue-reference').call(_t.append("issues.outdated_tags.".concat(prefix, "reference")));
+             enter.append('strong').call(_t.append('issues.suggested'));
+             enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+               var klass = d.type === '+' ? 'add' : 'remove';
+               return "tagDiff-cell tagDiff-cell-".concat(klass);
+             }).html(function (d) {
+               return d.display;
+             });
+           }
+         }
 
-             if (start && end) {
-               value = value.substring(0, start);
-             }
+         function oldMultipolygonIssues(entity, graph) {
+           var multipolygon, outerWay;
 
-             return value;
+           if (entity.type === 'relation') {
+             outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+             multipolygon = entity;
+           } else if (entity.type === 'way') {
+             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+             outerWay = entity;
+           } else {
+             return [];
            }
 
-           function fetchComboData(v, cb) {
-             _cancelFetch = false;
+           if (!multipolygon || !outerWay) return [];
+           return [new validationIssue({
+             type: type,
+             subtype: 'old_multipolygon',
+             severity: 'warning',
+             message: showMessage,
+             reference: showReference,
+             entityIds: [outerWay.id, multipolygon.id],
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
+                 title: _t.html('issues.fix.move_tags.title'),
+                 onClick: function onClick(context) {
+                   context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
+                 }
+               })];
+             }
+           })];
 
-             _fetcher.call(input, v, function (results) {
-               // already chose a value, don't overwrite or autocomplete it
-               if (_cancelFetch) return;
-               _suggestions = results;
-               results.forEach(function (d) {
-                 _fetched[d.value] = d;
-               });
+           function doUpgrade(graph) {
+             var currMultipolygon = graph.hasEntity(multipolygon.id);
+             var currOuterWay = graph.hasEntity(outerWay.id);
+             if (!currMultipolygon || !currOuterWay) return graph;
+             currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
+             graph = graph.replace(currMultipolygon);
+             return actionChangeTags(currOuterWay.id, {})(graph);
+           }
 
-               if (cb) {
-                 cb();
-               }
+           function showMessage(context) {
+             var currMultipolygon = context.hasEntity(multipolygon.id);
+             if (!currMultipolygon) return '';
+             return _t.html('issues.old_multipolygon.message', {
+               multipolygon: utilDisplayLabel(currMultipolygon, context.graph(), true
+               /* verbose */
+               )
              });
            }
 
-           function tryAutocomplete() {
-             if (!_canAutocomplete) return;
-             var val = _caseSensitive ? value() : value().toLowerCase();
-             if (!val) return; // Don't autocomplete if user is typing a number - #4935
-
-             if (!isNaN(parseFloat(val)) && isFinite(val)) return;
-             var bestIndex = -1;
-
-             for (var i = 0; i < _suggestions.length; i++) {
-               var suggestion = _suggestions[i].value;
-               var compare = _caseSensitive ? suggestion : suggestion.toLowerCase(); // if search string matches suggestion exactly, pick it..
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.old_multipolygon.reference'));
+           }
+         }
 
-               if (compare === val) {
-                 bestIndex = i;
-                 break; // otherwise lock in the first result that starts with the search string..
-               } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
-                 bestIndex = i;
-               }
-             }
+         var validation = function checkOutdatedTags(entity, graph) {
+           var issues = oldMultipolygonIssues(entity, graph);
+           if (!issues.length) issues = oldTagIssues(entity, graph);
+           return issues;
+         };
 
-             if (bestIndex !== -1) {
-               var bestVal = _suggestions[bestIndex].value;
-               input.property('value', bestVal);
-               input.node().setSelectionRange(val.length, bestVal.length);
-               return bestVal;
-             }
-           }
+         validation.type = type;
+         return validation;
+       }
 
-           function render() {
-             if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
-               hide();
-               return;
-             }
+       function validationPrivateData() {
+         var type = 'private_data'; // assume that some buildings are private
 
-             var shown = !container.selectAll('.combobox').empty();
-             if (!shown) return;
-             var combo = container.selectAll('.combobox');
-             var options = combo.selectAll('.combobox-option').data(_suggestions, function (d) {
-               return d.value;
-             });
-             options.exit().remove(); // enter/update
+         var privateBuildingValues = {
+           detached: true,
+           farm: true,
+           house: true,
+           houseboat: true,
+           residential: true,
+           semidetached_house: true,
+           static_caravan: true
+         }; // but they might be public if they have one of these other tags
 
-             options.enter().append('a').attr('class', 'combobox-option').attr('title', function (d) {
-               return d.title;
-             }).html(function (d) {
-               return d.display || d.value;
-             }).on('mouseenter', _mouseEnterHandler).on('mouseleave', _mouseLeaveHandler).merge(options).classed('selected', function (d) {
-               return d.value === _selected;
-             }).on('click.combo-option', accept).order();
-             var node = attachTo ? attachTo.node() : input.node();
-             var containerRect = container.node().getBoundingClientRect();
-             var rect = node.getBoundingClientRect();
-             combo.style('left', rect.left + 5 - containerRect.left + 'px').style('width', rect.width - 10 + 'px').style('top', rect.height + rect.top - containerRect.top + 'px');
-           } // Dispatches an 'accept' event
-           // Then hides the combobox.
+         var publicKeys = {
+           amenity: true,
+           craft: true,
+           historic: true,
+           leisure: true,
+           office: true,
+           shop: true,
+           tourism: true
+         }; // these tags may contain personally identifying info
 
+         var personalTags = {
+           'contact:email': true,
+           'contact:fax': true,
+           'contact:phone': true,
+           email: true,
+           fax: true,
+           phone: true
+         };
 
-           function accept(d3_event, d) {
-             _cancelFetch = true;
-             var thiz = input.node();
+         var validation = function checkPrivateData(entity) {
+           var tags = entity.tags;
+           if (!tags.building || !privateBuildingValues[tags.building]) return [];
+           var keepTags = {};
 
-             if (d) {
-               // user clicked on a suggestion
-               utilGetSetValue(input, d.value); // replace field contents
+           for (var k in tags) {
+             if (publicKeys[k]) return []; // probably a public feature
 
-               utilTriggerEvent(input, 'change');
-             } // clear (and keep) selection
+             if (!personalTags[k]) {
+               keepTags[k] = tags[k];
+             }
+           }
 
+           var tagDiff = utilTagDiff(tags, keepTags);
+           if (!tagDiff.length) return [];
+           var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
+           return [new validationIssue({
+             type: type,
+             severity: 'warning',
+             message: showMessage,
+             reference: showReference,
+             entityIds: [entity.id],
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.' + fixID + '.title'),
+                 onClick: function onClick(context) {
+                   context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
+                 }
+               })];
+             }
+           })];
 
-             var val = utilGetSetValue(input);
-             thiz.setSelectionRange(val.length, val.length);
-             d = _fetched[val];
-             dispatch$1.call('accept', thiz, d, val);
-             hide();
-           } // Dispatches an 'cancel' event
-           // Then hides the combobox.
+           function doUpgrade(graph) {
+             var currEntity = graph.hasEntity(entity.id);
+             if (!currEntity) return graph;
+             var newTags = Object.assign({}, currEntity.tags); // shallow copy
 
+             tagDiff.forEach(function (diff) {
+               if (diff.type === '-') {
+                 delete newTags[diff.key];
+               } else if (diff.type === '+') {
+                 newTags[diff.key] = diff.newVal;
+               }
+             });
+             return actionChangeTags(currEntity.id, newTags)(graph);
+           }
 
-           function cancel() {
-             _cancelFetch = true;
-             var thiz = input.node(); // clear (and remove) selection, and replace field contents
+           function showMessage(context) {
+             var currEntity = context.hasEntity(this.entityIds[0]);
+             if (!currEntity) return '';
+             return _t.html('issues.private_data.contact.message', {
+               feature: utilDisplayLabel(currEntity, context.graph())
+             });
+           }
 
-             var val = utilGetSetValue(input);
-             var start = input.property('selectionStart');
-             var end = input.property('selectionEnd');
-             val = val.slice(0, start) + val.slice(end);
-             utilGetSetValue(input, val);
-             thiz.setSelectionRange(val.length, val.length);
-             dispatch$1.call('cancel', thiz);
-             hide();
+           function showReference(selection) {
+             var enter = selection.selectAll('.issue-reference').data([0]).enter();
+             enter.append('div').attr('class', 'issue-reference').call(_t.append('issues.private_data.reference'));
+             enter.append('strong').call(_t.append('issues.suggested'));
+             enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
+               var klass = d.type === '+' ? 'add' : 'remove';
+               return 'tagDiff-cell tagDiff-cell-' + klass;
+             }).html(function (d) {
+               return d.display;
+             });
            }
          };
 
-         combobox.canAutocomplete = function (val) {
-           if (!arguments.length) return _canAutocomplete;
-           _canAutocomplete = val;
-           return combobox;
-         };
+         validation.type = type;
+         return validation;
+       }
 
-         combobox.caseSensitive = function (val) {
-           if (!arguments.length) return _caseSensitive;
-           _caseSensitive = val;
-           return combobox;
-         };
+       function validationSuspiciousName() {
+         var type = 'suspicious_name';
+         var keysToTestForGenericValues = ['aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway', 'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway'];
+         var _waitingForNsi = false; // Attempt to match a generic record in the name-suggestion-index.
 
-         combobox.data = function (val) {
-           if (!arguments.length) return _data;
-           _data = val;
-           return combobox;
-         };
+         function isGenericMatchInNsi(tags) {
+           var nsi = services.nsi;
 
-         combobox.fetcher = function (val) {
-           if (!arguments.length) return _fetcher;
-           _fetcher = val;
-           return combobox;
-         };
+           if (nsi) {
+             _waitingForNsi = nsi.status() === 'loading';
 
-         combobox.minItems = function (val) {
-           if (!arguments.length) return _minItems;
-           _minItems = val;
-           return combobox;
-         };
+             if (!_waitingForNsi) {
+               return nsi.isGenericName(tags);
+             }
+           }
 
-         combobox.itemsMouseEnter = function (val) {
-           if (!arguments.length) return _mouseEnterHandler;
-           _mouseEnterHandler = val;
-           return combobox;
-         };
+           return false;
+         } // Test if the name is just the key or tag value (e.g. "park")
 
-         combobox.itemsMouseLeave = function (val) {
-           if (!arguments.length) return _mouseLeaveHandler;
-           _mouseLeaveHandler = val;
-           return combobox;
-         };
 
-         return utilRebind(combobox, dispatch$1, 'on');
-       }
+         function nameMatchesRawTag(lowercaseName, tags) {
+           for (var i = 0; i < keysToTestForGenericValues.length; i++) {
+             var key = keysToTestForGenericValues[i];
+             var val = tags[key];
 
-       uiCombobox.off = function (input, context) {
-         input.on('focus.combo-input', null).on('blur.combo-input', null).on('keydown.combo-input', null).on('keyup.combo-input', null).on('input.combo-input', null).on('mousedown.combo-input', null).on('mouseup.combo-input', null);
-         context.container().on('scroll.combo-scroll', null);
-       };
+             if (val) {
+               val = val.toLowerCase();
 
-       // hide class, which sets display=none, and a d3 transition for opacity.
-       // this will cause blinking when called repeatedly, so check that the
-       // value actually changes between calls.
+               if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
+                 return true;
+               }
+             }
+           }
 
-       function uiToggle(show, callback) {
-         return function (selection) {
-           selection.style('opacity', show ? 0 : 1).classed('hide', false).transition().style('opacity', show ? 1 : 0).on('end', function () {
-             select(this).classed('hide', !show).style('opacity', null);
-             if (callback) callback.apply(this);
-           });
-         };
-       }
+           return false;
+         }
 
-       function uiDisclosure(context, key, expandedDefault) {
-         var dispatch$1 = dispatch('toggled');
+         function isGenericName(name, tags) {
+           name = name.toLowerCase();
+           return nameMatchesRawTag(name, tags) || isGenericMatchInNsi(tags);
+         }
+
+         function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
+           return new validationIssue({
+             type: type,
+             subtype: 'generic_name',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               if (!entity) return '';
+               var preset = _mainPresetIndex.match(entity, context.graph());
+               var langName = langCode && _mainLocalizer.languageName(langCode);
+               return _t.html('issues.generic_name.message' + (langName ? '_language' : ''), {
+                 feature: preset.name(),
+                 name: genericName,
+                 language: langName
+               });
+             },
+             reference: showReference,
+             entityIds: [entityId],
+             hash: "".concat(nameKey, "=").concat(genericName),
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.remove_the_name.title'),
+                 onClick: function onClick(context) {
+                   var entityId = this.issue.entityIds[0];
+                   var entity = context.entity(entityId);
+                   var tags = Object.assign({}, entity.tags); // shallow copy
 
-         var _expanded;
+                   delete tags[nameKey];
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
+                 }
+               })];
+             }
+           });
 
-         var _label = utilFunctor('');
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.generic_name.reference'));
+           }
+         }
 
-         var _updatePreference = true;
+         function makeIncorrectNameIssue(entityId, nameKey, incorrectName, langCode) {
+           return new validationIssue({
+             type: type,
+             subtype: 'not_name',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               if (!entity) return '';
+               var preset = _mainPresetIndex.match(entity, context.graph());
+               var langName = langCode && _mainLocalizer.languageName(langCode);
+               return _t.html('issues.incorrect_name.message' + (langName ? '_language' : ''), {
+                 feature: preset.name(),
+                 name: incorrectName,
+                 language: langName
+               });
+             },
+             reference: showReference,
+             entityIds: [entityId],
+             hash: "".concat(nameKey, "=").concat(incorrectName),
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 icon: 'iD-operation-delete',
+                 title: _t.html('issues.fix.remove_the_name.title'),
+                 onClick: function onClick(context) {
+                   var entityId = this.issue.entityIds[0];
+                   var entity = context.entity(entityId);
+                   var tags = Object.assign({}, entity.tags); // shallow copy
 
-         var _content = function _content() {};
+                   delete tags[nameKey];
+                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
+                 }
+               })];
+             }
+           });
 
-         var disclosure = function disclosure(selection) {
-           if (_expanded === undefined || _expanded === null) {
-             // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
-             var preference = corePreferences('disclosure.' + key + '.expanded');
-             _expanded = preference === null ? !!expandedDefault : preference === 'true';
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.generic_name.reference'));
            }
+         }
 
-           var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
-
-           var hideToggleEnter = hideToggle.enter().append('a').attr('href', '#').attr('class', 'hide-toggle hide-toggle-' + key).call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
-           hideToggleEnter.append('span').attr('class', 'hide-toggle-text'); // update
-
-           hideToggle = hideToggleEnter.merge(hideToggle);
-           hideToggle.on('click', toggle).classed('expanded', _expanded);
-           hideToggle.selectAll('.hide-toggle-text').html(_label());
-           hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
-           var wrap = selection.selectAll('.disclosure-wrap').data([0]); // enter/update
+         var validation = function checkGenericName(entity) {
+           var tags = entity.tags; // a generic name is allowed if it's a known brand or entity
 
-           wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
+           var hasWikidata = !!tags.wikidata || !!tags['brand:wikidata'] || !!tags['operator:wikidata'];
+           if (hasWikidata) return [];
+           var issues = [];
+           var notNames = (tags['not:name'] || '').split(';');
 
-           if (_expanded) {
-             wrap.call(_content);
-           }
+           for (var key in tags) {
+             var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
+             if (!m) continue;
+             var langCode = m.length >= 2 ? m[1] : null;
+             var value = tags[key];
 
-           function toggle(d3_event) {
-             d3_event.preventDefault();
-             _expanded = !_expanded;
+             if (notNames.length) {
+               for (var i in notNames) {
+                 var notName = notNames[i];
 
-             if (_updatePreference) {
-               corePreferences('disclosure.' + key + '.expanded', _expanded);
+                 if (notName && value === notName) {
+                   issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
+                   continue;
+                 }
+               }
              }
 
-             hideToggle.classed('expanded', _expanded);
-             hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
-             wrap.call(uiToggle(_expanded));
+             if (isGenericName(value, tags)) {
+               issues.provisional = _waitingForNsi; // retry later if we are waiting on NSI to finish loading
 
-             if (_expanded) {
-               wrap.call(_content);
+               issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
              }
-
-             dispatch$1.call('toggled', this, _expanded);
            }
-         };
-
-         disclosure.label = function (val) {
-           if (!arguments.length) return _label;
-           _label = utilFunctor(val);
-           return disclosure;
-         };
-
-         disclosure.expanded = function (val) {
-           if (!arguments.length) return _expanded;
-           _expanded = val;
-           return disclosure;
-         };
-
-         disclosure.updatePreference = function (val) {
-           if (!arguments.length) return _updatePreference;
-           _updatePreference = val;
-           return disclosure;
-         };
 
-         disclosure.content = function (val) {
-           if (!arguments.length) return _content;
-           _content = val;
-           return disclosure;
+           return issues;
          };
 
-         return utilRebind(disclosure, dispatch$1, 'on');
+         validation.type = type;
+         return validation;
        }
 
-       // Can be labeled and collapsible.
-
-       function uiSection(id, context) {
-         var _classes = utilFunctor('');
+       function validationUnsquareWay(context) {
+         var type = 'unsquare_way';
+         var DEFAULT_DEG_THRESHOLD = 5; // see also issues.js
+         // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
 
-         var _shouldDisplay;
+         var epsilon = 0.05;
+         var nodeThreshold = 10;
 
-         var _content;
+         function isBuilding(entity, graph) {
+           if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
+           return entity.tags.building && entity.tags.building !== 'no';
+         }
 
-         var _disclosure;
+         var validation = function checkUnsquareWay(entity, graph) {
+           if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
 
-         var _label;
+           if (entity.tags.nonsquare === 'yes') return [];
+           var isClosed = entity.isClosed();
+           if (!isClosed) return []; // this building has bigger problems
+           // don't flag ways with lots of nodes since they are likely detail-mapped
 
-         var _expandedByDefault = utilFunctor(true);
+           var nodes = graph.childNodes(entity).slice(); // shallow copy
 
-         var _disclosureContent;
+           if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
+           // ignore if not all nodes are fully downloaded
 
-         var _disclosureExpanded;
+           var osm = services.osm;
+           if (!osm || nodes.some(function (node) {
+             return !osm.isDataLoaded(node.loc);
+           })) return []; // don't flag connected ways to avoid unresolvable unsquare loops
 
-         var _containerSelection = select(null);
+           var hasConnectedSquarableWays = nodes.some(function (node) {
+             return graph.parentWays(node).some(function (way) {
+               if (way.id === entity.id) return false;
+               if (isBuilding(way, graph)) return true;
+               return graph.parentRelations(way).some(function (parentRelation) {
+                 return parentRelation.isMultipolygon() && parentRelation.tags.building && parentRelation.tags.building !== 'no';
+               });
+             });
+           });
+           if (hasConnectedSquarableWays) return []; // user-configurable square threshold
 
-         var section = {
-           id: id
-         };
+           var storedDegreeThreshold = corePreferences('validate-square-degrees');
+           var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
+           var points = nodes.map(function (node) {
+             return context.projection(node.loc);
+           });
+           if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) return [];
+           var autoArgs; // don't allow autosquaring features linked to wikidata
 
-         section.classes = function (val) {
-           if (!arguments.length) return _classes;
-           _classes = utilFunctor(val);
-           return section;
-         };
+           if (!entity.tags.wikidata) {
+             // use same degree threshold as for detection
+             var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
+             autoAction.transitionable = false; // when autofixing, do it instantly
 
-         section.label = function (val) {
-           if (!arguments.length) return _label;
-           _label = utilFunctor(val);
-           return section;
-         };
+             autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
+               n: 1
+             })];
+           }
 
-         section.expandedByDefault = function (val) {
-           if (!arguments.length) return _expandedByDefault;
-           _expandedByDefault = utilFunctor(val);
-           return section;
-         };
+           return [new validationIssue({
+             type: type,
+             subtype: 'building',
+             severity: 'warning',
+             message: function message(context) {
+               var entity = context.hasEntity(this.entityIds[0]);
+               return entity ? _t.html('issues.unsquare_way.message', {
+                 feature: utilDisplayLabel(entity, context.graph())
+               }) : '';
+             },
+             reference: showReference,
+             entityIds: [entity.id],
+             hash: degreeThreshold,
+             dynamicFixes: function dynamicFixes() {
+               return [new validationIssueFix({
+                 icon: 'iD-operation-orthogonalize',
+                 title: _t.html('issues.fix.square_feature.title'),
+                 autoArgs: autoArgs,
+                 onClick: function onClick(context, completionHandler) {
+                   var entityId = this.issue.entityIds[0]; // use same degree threshold as for detection
 
-         section.shouldDisplay = function (val) {
-           if (!arguments.length) return _shouldDisplay;
-           _shouldDisplay = utilFunctor(val);
-           return section;
-         };
+                   context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
+                     n: 1
+                   })); // run after the squaring transition (currently 150ms)
 
-         section.content = function (val) {
-           if (!arguments.length) return _content;
-           _content = val;
-           return section;
-         };
+                   window.setTimeout(function () {
+                     completionHandler();
+                   }, 175);
+                 }
+               })
+               /*
+               new validationIssueFix({
+                   title: t.html('issues.fix.tag_as_unsquare.title'),
+                   onClick: function(context) {
+                       var entityId = this.issue.entityIds[0];
+                       var entity = context.entity(entityId);
+                       var tags = Object.assign({}, entity.tags);  // shallow copy
+                       tags.nonsquare = 'yes';
+                       context.perform(
+                           actionChangeTags(entityId, tags),
+                           t('issues.fix.tag_as_unsquare.annotation')
+                       );
+                   }
+               })
+               */
+               ];
+             }
+           })];
 
-         section.disclosureContent = function (val) {
-           if (!arguments.length) return _disclosureContent;
-           _disclosureContent = val;
-           return section;
+           function showReference(selection) {
+             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').call(_t.append('issues.unsquare_way.buildings.reference'));
+           }
          };
 
-         section.disclosureExpanded = function (val) {
-           if (!arguments.length) return _disclosureExpanded;
-           _disclosureExpanded = val;
-           return section;
-         }; // may be called multiple times
+         validation.type = type;
+         return validation;
+       }
 
+       var Validations = /*#__PURE__*/Object.freeze({
+               __proto__: null,
+               validationAlmostJunction: validationAlmostJunction,
+               validationCloseNodes: validationCloseNodes,
+               validationCrossingWays: validationCrossingWays,
+               validationDisconnectedWay: validationDisconnectedWay,
+               validationFormatting: validationFormatting,
+               validationHelpRequest: validationHelpRequest,
+               validationImpossibleOneway: validationImpossibleOneway,
+               validationIncompatibleSource: validationIncompatibleSource,
+               validationMaprules: validationMaprules,
+               validationMismatchedGeometry: validationMismatchedGeometry,
+               validationMissingRole: validationMissingRole,
+               validationMissingTag: validationMissingTag,
+               validationOutdatedTags: validationOutdatedTags,
+               validationPrivateData: validationPrivateData,
+               validationSuspiciousName: validationSuspiciousName,
+               validationUnsquareWay: validationUnsquareWay
+       });
 
-         section.render = function (selection) {
-           _containerSelection = selection.selectAll('.section-' + id).data([0]);
+       function coreValidator(context) {
+         var _this = this;
 
-           var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
+         var dispatch = dispatch$8('validated', 'focusedIssue');
+         var validator = utilRebind({}, dispatch, 'on');
+         var _rules = {};
+         var _disabledRules = {};
 
-           _containerSelection = sectionEnter.merge(_containerSelection);
+         var _ignoredIssueIDs = new Set();
 
-           _containerSelection.call(renderContent);
-         };
+         var _resolvedIssueIDs = new Set();
 
-         section.reRender = function () {
-           _containerSelection.call(renderContent);
-         };
+         var _baseCache = validationCache('base'); // issues before any user edits
 
-         section.selection = function () {
-           return _containerSelection;
-         };
 
-         section.disclosure = function () {
-           return _disclosure;
-         }; // may be called multiple times
+         var _headCache = validationCache('head'); // issues after all user edits
 
 
-         function renderContent(selection) {
-           if (_shouldDisplay) {
-             var shouldDisplay = _shouldDisplay();
+         var _completeDiff = {}; // complete diff base -> head of what the user changed
 
-             selection.classed('hide', !shouldDisplay);
+         var _headIsCurrent = false;
 
-             if (!shouldDisplay) {
-               selection.html('');
-               return;
-             }
-           }
+         var _deferredRIC = new Set(); // Set( RequestIdleCallback handles )
 
-           if (_disclosureContent) {
-             if (!_disclosure) {
-               _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault()).label(_label || '')
-               /*.on('toggled', function(expanded) {
-                   if (expanded) { selection.node().parentNode.scrollTop += 200; }
-               })*/
-               .content(_disclosureContent);
-             }
 
-             if (_disclosureExpanded !== undefined) {
-               _disclosure.expanded(_disclosureExpanded);
+         var _deferredST = new Set(); // Set( SetTimeout handles )
 
-               _disclosureExpanded = undefined;
-             }
 
-             selection.call(_disclosure);
-             return;
-           }
+         var _headPromise; // Promise fulfilled when validation is performed up to headGraph snapshot
 
-           if (_content) {
-             selection.call(_content);
-           }
-         }
 
-         return section;
-       }
+         var RETRY = 5000; // wait 5sec before revalidating provisional entities
+         // Allow validation severity to be overridden by url queryparams...
+         // See: https://github.com/openstreetmap/iD/pull/8243
+         //
+         // Each param should contain a urlencoded comma separated list of
+         // `type/subtype` rules.  `*` may be used as a wildcard..
+         // Examples:
+         //  `validationError=disconnected_way/*`
+         //  `validationError=disconnected_way/highway`
+         //  `validationError=crossing_ways/bridge*`
+         //  `validationError=crossing_ways/bridge*,crossing_ways/tunnel*`
+
+         var _errorOverrides = parseHashParam(context.initialHashParams.validationError);
+
+         var _warningOverrides = parseHashParam(context.initialHashParams.validationWarning);
+
+         var _disableOverrides = parseHashParam(context.initialHashParams.validationDisable); // `parseHashParam()`   (private)
+         // Checks hash parameters for severity overrides
+         // Arguments
+         //   `param` - a url hash parameter (`validationError`, `validationWarning`, or `validationDisable`)
+         // Returns
+         //   Array of Objects like { type: RegExp, subtype: RegExp }
+         //
 
-       // {
-       //   key: 'string',     // required
-       //   value: 'string'    // optional
-       // }
-       //   -or-
-       // {
-       //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
-       // }
-       //
 
-       function uiTagReference(what) {
-         var wikibase = what.qid ? services.wikidata : services.osmWikibase;
-         var tagReference = {};
+         function parseHashParam(param) {
+           var result = [];
+           var rules = (param || '').split(',');
+           rules.forEach(function (rule) {
+             rule = rule.trim();
+             var parts = rule.split('/', 2); // "type/subtype"
+
+             var type = parts[0];
+             var subtype = parts[1] || '*';
+             if (!type || !subtype) return;
+             result.push({
+               type: makeRegExp(type),
+               subtype: makeRegExp(subtype)
+             });
+           });
+           return result;
 
-         var _button = select(null);
+           function makeRegExp(str) {
+             var escaped = str.replace(/[-\/\\^$+?.()|[\]{}]/g, '\\$&') // escape all reserved chars except for the '*'
+             .replace(/\*/g, '.*'); // treat a '*' like '.*'
 
-         var _body = select(null);
+             return new RegExp('^' + escaped + '$');
+           }
+         } // `init()`
+         // Initialize the validator, called once on iD startup
+         //
 
-         var _loaded;
 
-         var _showing;
+         validator.init = function () {
+           Object.values(Validations).forEach(function (validation) {
+             if (typeof validation !== 'function') return;
+             var fn = validation(context);
+             var key = fn.type;
+             _rules[key] = fn;
+           });
+           var disabledRules = corePreferences('validate-disabledRules');
 
-         function load() {
-           if (!wikibase) return;
+           if (disabledRules) {
+             disabledRules.split(',').forEach(function (k) {
+               return _disabledRules[k] = true;
+             });
+           }
+         }; // `reset()`   (private)
+         // Cancels deferred work and resets all caches
+         //
+         // Arguments
+         //   `resetIgnored` - `true` to clear the list of user-ignored issues
+         //
 
-           _button.classed('tag-reference-loading', true);
 
-           wikibase.getDocs(what, gotDocs);
-         }
+         function reset(resetIgnored) {
+           // cancel deferred work
+           _deferredRIC.forEach(window.cancelIdleCallback);
 
-         function gotDocs(err, docs) {
-           _body.html('');
+           _deferredRIC.clear();
 
-           if (!docs || !docs.title) {
-             _body.append('p').attr('class', 'tag-reference-description').html(_t.html('inspector.no_documentation_key'));
+           _deferredST.forEach(window.clearTimeout);
 
-             done();
-             return;
-           }
+           _deferredST.clear(); // empty queues and resolve any pending promise
 
-           if (docs.imageURL) {
-             _body.append('img').attr('class', 'tag-reference-wiki-image').attr('src', docs.imageURL).on('load', function () {
-               done();
-             }).on('error', function () {
-               select(this).remove();
-               done();
-             });
-           } else {
-             done();
-           }
 
-           _body.append('p').attr('class', 'tag-reference-description').html(docs.description ? _mainLocalizer.htmlForLocalizedText(docs.description, docs.descriptionLocaleCode) : _t.html('inspector.no_documentation_key')).append('a').attr('class', 'tag-reference-edit').attr('target', '_blank').attr('title', _t('inspector.edit_reference')).attr('href', docs.editURL).call(svgIcon('#iD-icon-edit', 'inline'));
+           _baseCache.queue = [];
+           _headCache.queue = [];
+           processQueue(_headCache);
+           processQueue(_baseCache); // clear caches
 
-           if (docs.wiki) {
-             _body.append('a').attr('class', 'tag-reference-link').attr('target', '_blank').attr('href', docs.wiki.url).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html(docs.wiki.text));
-           } // Add link to info about "good changeset comments" - #2923
+           if (resetIgnored) _ignoredIssueIDs.clear();
 
+           _resolvedIssueIDs.clear();
 
-           if (what.key === 'comment') {
-             _body.append('a').attr('class', 'tag-reference-comment-link').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', _t('commit.about_changeset_comments_link')).append('span').html(_t.html('commit.about_changeset_comments'));
-           }
-         }
+           _baseCache = validationCache('base');
+           _headCache = validationCache('head');
+           _completeDiff = {};
+           _headIsCurrent = false;
+         } // `reset()`
+         // clear caches, called whenever iD resets after a save or switches sources
+         // (clears out the _ignoredIssueIDs set also)
+         //
 
-         function done() {
-           _loaded = true;
 
-           _button.classed('tag-reference-loading', false);
+         validator.reset = function () {
+           reset(true);
+         }; // `resetIgnoredIssues()`
+         // clears out the _ignoredIssueIDs Set
+         //
 
-           _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-           _showing = true;
+         validator.resetIgnoredIssues = function () {
+           _ignoredIssueIDs.clear();
 
-           _button.selectAll('svg.icon use').each(function () {
-             var iconUse = select(this);
+           dispatch.call('validated'); // redraw UI
+         }; // `revalidateUnsquare()`
+         // Called whenever the user changes the unsquare threshold
+         // It reruns just the "unsquare_way" validation on all buildings.
+         //
 
-             if (iconUse.attr('href') === '#iD-icon-info') {
-               iconUse.attr('href', '#iD-icon-info-filled');
-             }
-           });
-         }
 
-         function hide() {
-           _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
-             _body.classed('expanded', false);
-           });
+         validator.revalidateUnsquare = function () {
+           revalidateUnsquare(_headCache);
+           revalidateUnsquare(_baseCache);
+           dispatch.call('validated');
+         };
 
-           _showing = false;
+         function revalidateUnsquare(cache) {
+           var checkUnsquareWay = _rules.unsquare_way;
+           if (!cache.graph || typeof checkUnsquareWay !== 'function') return; // uncache existing
 
-           _button.selectAll('svg.icon use').each(function () {
-             var iconUse = select(this);
+           cache.uncacheIssuesOfType('unsquare_way');
+           var buildings = context.history().tree().intersects(geoExtent([-180, -90], [180, 90]), cache.graph) // everywhere
+           .filter(function (entity) {
+             return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
+           }); // rerun for all buildings
 
-             if (iconUse.attr('href') === '#iD-icon-info-filled') {
-               iconUse.attr('href', '#iD-icon-info');
-             }
+           buildings.forEach(function (entity) {
+             var detected = checkUnsquareWay(entity, cache.graph);
+             if (!detected.length) return;
+             cache.cacheIssues(detected);
            });
-         }
+         } // `getIssues()`
+         // Gets all issues that match the given options
+         // This is called by many other places
+         //
+         // Arguments
+         //   `options` Object like:
+         //   {
+         //     what: 'all',                  // 'all' or 'edited'
+         //     where: 'all',                 // 'all' or 'visible'
+         //     includeIgnored: false,        // true, false, or 'only'
+         //     includeDisabledRules: false   // true, false, or 'only'
+         //   }
+         //
+         // Returns
+         //   An Array containing the issues
+         //
 
-         tagReference.button = function (selection, klass, iconName) {
-           _button = selection.selectAll('.tag-reference-button').data([0]);
-           _button = _button.enter().append('button').attr('class', 'tag-reference-button ' + (klass || '')).attr('title', _t('icons.information')).call(svgIcon('#iD-icon-' + (iconName || 'inspect'))).merge(_button);
 
-           _button.on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             this.blur(); // avoid keeping focus on the button - #4641
+         validator.getIssues = function (options) {
+           var opts = Object.assign({
+             what: 'all',
+             where: 'all',
+             includeIgnored: false,
+             includeDisabledRules: false
+           }, options);
+           var view = context.map().extent();
+           var seen = new Set();
+           var results = []; // collect head issues - present in the user edits
+
+           if (_headCache.graph && _headCache.graph !== _baseCache.graph) {
+             Object.values(_headCache.issuesByIssueID).forEach(function (issue) {
+               // In the head cache, only count features that the user is responsible for - #8632
+               // For example, a user can undo some work and an issue will still present in the
+               // head graph, but we don't want to credit the user for causing that issue.
+               var userModified = (issue.entityIds || []).some(function (id) {
+                 return _completeDiff.hasOwnProperty(id);
+               });
+               if (opts.what === 'edited' && !userModified) return; // present in head but user didn't touch it
 
-             if (_showing) {
-               hide();
-             } else if (_loaded) {
-               done();
-             } else {
-               load();
-             }
-           });
-         };
+               if (!filter(issue)) return;
+               seen.add(issue.id);
+               results.push(issue);
+             });
+           } // collect base issues - present before user edits
 
-         tagReference.body = function (selection) {
-           var itemID = what.qid || what.key + '-' + (what.value || '');
-           _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
-             return d;
-           });
 
-           _body.exit().remove();
+           if (opts.what === 'all') {
+             Object.values(_baseCache.issuesByIssueID).forEach(function (issue) {
+               if (!filter(issue)) return;
+               seen.add(issue.id);
+               results.push(issue);
+             });
+           }
 
-           _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
+           return results; // Filter the issue set to include only what the calling code wants to see.
+           // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
+           // because that is the graph that the calling code will be using.
 
-           if (_showing === false) {
-             hide();
-           }
-         };
+           function filter(issue) {
+             if (!issue) return false;
+             if (seen.has(issue.id)) return false;
+             if (_resolvedIssueIDs.has(issue.id)) return false;
+             if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) return false;
+             if (!opts.includeDisabledRules && _disabledRules[issue.type]) return false;
+             if (opts.includeIgnored === 'only' && !_ignoredIssueIDs.has(issue.id)) return false;
+             if (!opts.includeIgnored && _ignoredIssueIDs.has(issue.id)) return false; // This issue may involve an entity that doesn't exist in context.graph()
+             // This can happen because validation is async and rendering the issue lists is async.
 
-         tagReference.showing = function (val) {
-           if (!arguments.length) return _showing;
-           _showing = val;
-           return tagReference;
-         };
+             if ((issue.entityIds || []).some(function (id) {
+               return !context.hasEntity(id);
+             })) return false;
 
-         return tagReference;
-       }
+             if (opts.where === 'visible') {
+               var extent = issue.extent(context.graph());
+               if (!view.intersects(extent)) return false;
+             }
 
-       function uiSectionRawTagEditor(id, context) {
-         var section = uiSection(id, context).classes('raw-tag-editor').label(function () {
-           var count = Object.keys(_tags).filter(function (d) {
-             return d;
-           }).length;
-           return _t('inspector.title_count', {
-             title: _t.html('inspector.tags'),
-             count: count
-           });
-         }).expandedByDefault(false).disclosureContent(renderDisclosureContent);
-         var taginfo = services.taginfo;
-         var dispatch$1 = dispatch('change');
-         var availableViews = [{
-           id: 'list',
-           icon: '#fas-th-list'
-         }, {
-           id: 'text',
-           icon: '#fas-i-cursor'
-         }];
+             return true;
+           }
+         }; // `getResolvedIssues()`
+         // Gets the issues that have been fixed by the user.
+         //
+         // Resolved issues are tracked in the `_resolvedIssueIDs` Set,
+         // and they should all be issues that exist in the _baseCache.
+         //
+         // Returns
+         //   An Array containing the issues
+         //
 
-         var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
 
+         validator.getResolvedIssues = function () {
+           return Array.from(_resolvedIssueIDs).map(function (issueID) {
+             return _baseCache.issuesByIssueID[issueID];
+           }).filter(Boolean);
+         }; // `focusIssue()`
+         // Adjusts the map to focus on the given issue.
+         // (requires the issue to have a reasonable extent defined)
+         //
+         // Arguments
+         //   `issue` - the issue to focus on
+         //
 
-         var _readOnlyTags = []; // the keys in the order we want them to display
 
-         var _orderedKeys = [];
-         var _showBlank = false;
-         var _pendingChange = null;
+         validator.focusIssue = function (issue) {
+           // Note that we use `context.graph()`/`context.hasEntity()` here, not `cache.graph`,
+           // because that is the graph that the calling code will be using.
+           var graph = context.graph();
+           var selectID;
+           var focusCenter; // Try to focus the map at the center of the issue..
 
-         var _state;
+           var issueExtent = issue.extent(graph);
 
-         var _presets;
+           if (issueExtent) {
+             focusCenter = issueExtent.center();
+           } // Try to select the first entity in the issue..
 
-         var _tags;
 
-         var _entityIDs;
+           if (issue.entityIds && issue.entityIds.length) {
+             selectID = issue.entityIds[0]; // If a relation, focus on one of its members instead.
+             // Otherwise we might be focusing on a part of map where the relation is not visible.
 
-         var _didInteract = false;
+             if (selectID && selectID.charAt(0) === 'r') {
+               // relation
+               var ids = utilEntityAndDeepMemberIDs([selectID], graph);
+               var nodeID = ids.find(function (id) {
+                 return id.charAt(0) === 'n' && graph.hasEntity(id);
+               });
 
-         function interacted() {
-           _didInteract = true;
-         }
+               if (!nodeID) {
+                 // relation has no downloaded nodes to focus on
+                 var wayID = ids.find(function (id) {
+                   return id.charAt(0) === 'w' && graph.hasEntity(id);
+                 });
 
-         function renderDisclosureContent(wrap) {
-           // remove deleted keys
-           _orderedKeys = _orderedKeys.filter(function (key) {
-             return _tags[key] !== undefined;
-           }); // When switching to a different entity or changing the state (hover/select)
-           // reorder the keys alphabetically.
-           // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
-           // Otherwise leave their order alone - #5857, #5927
+                 if (wayID) {
+                   nodeID = graph.entity(wayID).first(); // focus on the first node of this way
+                 }
+               }
 
-           var all = Object.keys(_tags).sort();
-           var missingKeys = utilArrayDifference(all, _orderedKeys);
+               if (nodeID) {
+                 focusCenter = graph.entity(nodeID).loc;
+               }
+             }
+           }
 
-           for (var i in missingKeys) {
-             _orderedKeys.push(missingKeys[i]);
-           } // assemble row data
+           if (focusCenter) {
+             // Adjust the view
+             var setZoom = Math.max(context.map().zoom(), 19);
+             context.map().unobscuredCenterZoomEase(focusCenter, setZoom);
+           }
+
+           if (selectID) {
+             // Enter select mode
+             window.setTimeout(function () {
+               context.enter(modeSelect(context, [selectID]));
+               dispatch.call('focusedIssue', _this, issue);
+             }, 250); // after ease
+           }
+         }; // `getIssuesBySeverity()`
+         // Gets the issues then groups them by error/warning
+         // (This just calls getIssues, then puts issues in groups)
+         //
+         // Arguments
+         //   `options` - (see `getIssues`)
+         // Returns
+         //   Object result like:
+         //   {
+         //     error:    Array of errors,
+         //     warning:  Array of warnings
+         //   }
+         //
 
 
-           var rowData = _orderedKeys.map(function (key, i) {
-             return {
-               index: i,
-               key: key,
-               value: _tags[key]
-             };
-           }); // append blank row last, if necessary
+         validator.getIssuesBySeverity = function (options) {
+           var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
+           groups.error = groups.error || [];
+           groups.warning = groups.warning || [];
+           return groups;
+         }; // `getEntityIssues()`
+         // Gets the issues that the given entity IDs have in common, matching the given options
+         // (This just calls getIssues, then filters for the given entity IDs)
+         // The issues are sorted for relevance
+         //
+         // Arguments
+         //   `entityIDs` - Array or Set of entityIDs to get issues for
+         //   `options` - (see `getIssues`)
+         // Returns
+         //   An Array containing the issues
+         //
 
 
-           if (!rowData.length || _showBlank) {
-             _showBlank = false;
-             rowData.push({
-               index: rowData.length,
-               key: '',
-               value: ''
+         validator.getSharedEntityIssues = function (entityIDs, options) {
+           var orderedIssueTypes = [// Show some issue types in a particular order:
+           'missing_tag', 'missing_role', // - missing data first
+           'outdated_tags', 'mismatched_geometry', // - identity issues
+           'crossing_ways', 'almost_junction', // - geometry issues where fixing them might solve connectivity issues
+           'disconnected_way', 'impossible_oneway' // - finally connectivity issues
+           ];
+           var allIssues = validator.getIssues(options);
+           var forEntityIDs = new Set(entityIDs);
+           return allIssues.filter(function (issue) {
+             return (issue.entityIds || []).some(function (entityID) {
+               return forEntityIDs.has(entityID);
              });
-           } // View Options
+           }).sort(function (issue1, issue2) {
+             if (issue1.type === issue2.type) {
+               // issues of the same type, sort deterministically
+               return issue1.id < issue2.id ? -1 : 1;
+             }
 
+             var index1 = orderedIssueTypes.indexOf(issue1.type);
+             var index2 = orderedIssueTypes.indexOf(issue2.type);
 
-           var options = wrap.selectAll('.raw-tag-options').data([0]);
-           options.exit().remove();
-           var optionsEnter = options.enter().insert('div', ':first-child').attr('class', 'raw-tag-options');
-           var optionEnter = optionsEnter.selectAll('.raw-tag-option').data(availableViews, function (d) {
-             return d.id;
-           }).enter();
-           optionEnter.append('button').attr('class', function (d) {
-             return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
-           }).attr('title', function (d) {
-             return _t('icons.' + d.id);
-           }).on('click', function (d3_event, d) {
-             _tagView = d.id;
-             corePreferences('raw-tag-editor-view', d.id);
-             wrap.selectAll('.raw-tag-option').classed('selected', function (datum) {
-               return datum === d;
-             });
-             wrap.selectAll('.tag-text').classed('hide', d.id !== 'text').each(setTextareaHeight);
-             wrap.selectAll('.tag-list, .add-row').classed('hide', d.id !== 'list');
-           }).each(function (d) {
-             select(this).call(svgIcon(d.icon));
-           }); // View as Text
+             if (index1 !== -1 && index2 !== -1) {
+               // both issue types have explicit sort orders
+               return index1 - index2;
+             } else if (index1 === -1 && index2 === -1) {
+               // neither issue type has an explicit sort order, sort by type
+               return issue1.type < issue2.type ? -1 : 1;
+             } else {
+               // order explicit types before everything else
+               return index1 !== -1 ? -1 : 1;
+             }
+           });
+         }; // `getEntityIssues()`
+         // Get an array of detected issues for the given entityID.
+         // (This just calls getSharedEntityIssues for a single entity)
+         //
+         // Arguments
+         //   `entityID` - the entity ID to get the issues for
+         //   `options` - (see `getIssues`)
+         // Returns
+         //   An Array containing the issues
+         //
 
-           var textData = rowsToText(rowData);
-           var textarea = wrap.selectAll('.tag-text').data([0]);
-           textarea = textarea.enter().append('textarea').attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : '')).call(utilNoAuto).attr('placeholder', _t('inspector.key_value')).attr('spellcheck', 'false').merge(textarea);
-           textarea.call(utilGetSetValue, textData).each(setTextareaHeight).on('input', setTextareaHeight).on('focus', interacted).on('blur', textChanged).on('change', textChanged); // View as List
 
-           var list = wrap.selectAll('.tag-list').data([0]);
-           list = list.enter().append('ul').attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : '')).merge(list); // Container for the Add button
+         validator.getEntityIssues = function (entityID, options) {
+           return validator.getSharedEntityIssues([entityID], options);
+         }; // `getRuleKeys()`
+         //
+         // Returns
+         //   An Array containing the rule keys
+         //
 
-           var addRowEnter = wrap.selectAll('.add-row').data([0]).enter().append('div').attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
-           addRowEnter.append('button').attr('class', 'add-tag').call(svgIcon('#iD-icon-plus', 'light')).on('click', addTag);
-           addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
-           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
-           // Tag list items
+         validator.getRuleKeys = function () {
+           return Object.keys(_rules);
+         }; // `isRuleEnabled()`
+         //
+         // Arguments
+         //   `key` - the rule to check (e.g. 'crossing_ways')
+         // Returns
+         //   `true`/`false`
+         //
 
-           var items = list.selectAll('.tag-row').data(rowData, function (d) {
-             return d.key;
-           });
-           items.exit().each(unbind).remove(); // Enter
 
-           var itemsEnter = items.enter().append('li').attr('class', 'tag-row').classed('readonly', isReadOnly);
-           var innerWrap = itemsEnter.append('div').attr('class', 'inner-wrap');
-           innerWrap.append('div').attr('class', 'key-wrap').append('input').property('type', 'text').attr('class', 'key').call(utilNoAuto).on('focus', interacted).on('blur', keyChange).on('change', keyChange);
-           innerWrap.append('div').attr('class', 'value-wrap').append('input').property('type', 'text').attr('class', 'value').call(utilNoAuto).on('focus', interacted).on('blur', valueChange).on('change', valueChange).on('keydown.push-more', pushMore);
-           innerWrap.append('button').attr('class', 'form-field-button remove').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')); // Update
+         validator.isRuleEnabled = function (key) {
+           return !_disabledRules[key];
+         }; // `toggleRule()`
+         // Toggles a single validation rule,
+         // then reruns the validation so that the user sees something happen in the UI
+         //
+         // Arguments
+         //   `key` - the rule to toggle (e.g. 'crossing_ways')
+         //
 
-           items = items.merge(itemsEnter).sort(function (a, b) {
-             return a.index - b.index;
-           });
-           items.each(function (d) {
-             var row = select(this);
-             var key = row.select('input.key'); // propagate bound data
 
-             var value = row.select('input.value'); // propagate bound data
+         validator.toggleRule = function (key) {
+           if (_disabledRules[key]) {
+             delete _disabledRules[key];
+           } else {
+             _disabledRules[key] = true;
+           }
 
-             if (_entityIDs && taginfo && _state !== 'hover') {
-               bindTypeahead(key, value);
-             }
+           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+           validator.validate();
+         }; // `disableRules()`
+         // Disables given validation rules,
+         // then reruns the validation so that the user sees something happen in the UI
+         //
+         // Arguments
+         //   `keys` - Array or Set containing rule keys to disable
+         //
 
-             var referenceOptions = {
-               key: d.key
-             };
 
-             if (typeof d.value === 'string') {
-               referenceOptions.value = d.value;
-             }
+         validator.disableRules = function (keys) {
+           _disabledRules = {};
+           keys.forEach(function (k) {
+             return _disabledRules[k] = true;
+           });
+           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
+           validator.validate();
+         }; // `ignoreIssue()`
+         // Don't show the given issue in lists
+         //
+         // Arguments
+         //   `issueID` - the issueID
+         //
 
-             var reference = uiTagReference(referenceOptions);
 
-             if (_state === 'hover') {
-               reference.showing(false);
-             }
+         validator.ignoreIssue = function (issueID) {
+           _ignoredIssueIDs.add(issueID);
+         }; // `validate()`
+         // Validates anything that has changed in the head graph since the last time it was run.
+         // (head graph contains user's edits)
+         //
+         // Returns
+         //   A Promise fulfilled when the validation has completed and then dispatches a `validated` event.
+         //   This may take time but happen in the background during browser idle time.
+         //
 
-             row.select('.inner-wrap') // propagate bound data
-             .call(reference.button);
-             row.call(reference.body);
-             row.select('button.remove'); // propagate bound data
-           });
-           items.selectAll('input.key').attr('title', function (d) {
-             return d.key;
-           }).call(utilGetSetValue, function (d) {
-             return d.key;
-           }).attr('readonly', function (d) {
-             return isReadOnly(d) || typeof d.value !== 'string' || null;
-           });
-           items.selectAll('input.value').attr('title', function (d) {
-             return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
-           }).classed('mixed', function (d) {
-             return Array.isArray(d.value);
-           }).attr('placeholder', function (d) {
-             return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
-           }).call(utilGetSetValue, function (d) {
-             return typeof d.value === 'string' ? d.value : '';
-           }).attr('readonly', function (d) {
-             return isReadOnly(d) || null;
-           });
-           items.selectAll('button.remove').on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag); // 'click' fires too late - #5878
-         }
 
-         function isReadOnly(d) {
-           for (var i = 0; i < _readOnlyTags.length; i++) {
-             if (d.key.match(_readOnlyTags[i]) !== null) {
-               return true;
-             }
+         validator.validate = function () {
+           // Make sure the caches have graphs assigned to them.
+           // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)
+           var baseGraph = context.history().base();
+           if (!_headCache.graph) _headCache.graph = baseGraph;
+           if (!_baseCache.graph) _baseCache.graph = baseGraph;
+           var prevGraph = _headCache.graph;
+           var currGraph = context.graph();
+
+           if (currGraph === prevGraph) {
+             // _headCache.graph is current - we are caught up
+             _headIsCurrent = true;
+             dispatch.call('validated');
+             return Promise.resolve();
            }
 
-           return false;
-         }
+           if (_headPromise) {
+             // Validation already in process, but we aren't caught up to current
+             _headIsCurrent = false; // We will need to catch up after the validation promise fulfills
 
-         function setTextareaHeight() {
-           if (_tagView !== 'text') return;
-           var selection = select(this);
-           var matches = selection.node().value.match(/\n/g);
-           var lineCount = 2 + Number(matches && matches.length);
-           var lineHeight = 20;
-           selection.style('height', lineCount * lineHeight + 'px');
-         }
+             return _headPromise;
+           } // If we get here, its time to start validating stuff.
 
-         function stringify(s) {
-           return JSON.stringify(s).slice(1, -1); // without leading/trailing "
-         }
 
-         function unstringify(s) {
-           var leading = '';
-           var trailing = '';
+           _headCache.graph = currGraph; // take snapshot
 
-           if (s.length < 1 || s.charAt(0) !== '"') {
-             leading = '"';
-           }
+           _completeDiff = context.history().difference().complete();
+           var incrementalDiff = coreDifference(prevGraph, currGraph);
+           var entityIDs = Object.keys(incrementalDiff.complete());
+           entityIDs = _headCache.withAllRelatedEntities(entityIDs); // expand set
 
-           if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
-             trailing = '"';
+           if (!entityIDs.size) {
+             dispatch.call('validated');
+             return Promise.resolve();
            }
 
-           return JSON.parse(leading + s + trailing);
-         }
+           _headPromise = validateEntitiesAsync(entityIDs, _headCache).then(function () {
+             return updateResolvedIssues(entityIDs);
+           }).then(function () {
+             return dispatch.call('validated');
+           })["catch"](function () {
+             /* ignore */
+           }).then(function () {
+             _headPromise = null;
 
-         function rowsToText(rows) {
-           var str = rows.filter(function (row) {
-             return row.key && row.key.trim() !== '';
-           }).map(function (row) {
-             var rawVal = row.value;
-             if (typeof rawVal !== 'string') rawVal = '*';
-             var val = rawVal ? stringify(rawVal) : '';
-             return stringify(row.key) + '=' + val;
-           }).join('\n');
+             if (!_headIsCurrent) {
+               validator.validate(); // run it again to catch up to current graph
+             }
+           });
+           return _headPromise;
+         }; // register event handlers:
+         // WHEN TO RUN VALIDATION:
+         // When history changes:
 
-           if (_state !== 'hover' && str.length) {
-             return str + '\n';
-           }
 
-           return str;
-         }
+         context.history().on('restore.validator', validator.validate) // on restore saved history
+         .on('undone.validator', validator.validate) // on undo
+         .on('redone.validator', validator.validate) // on redo
+         .on('reset.validator', function () {
+           // on history reset - happens after save, or enter/exit walkthrough
+           reset(false); // cached issues aren't valid any longer if the history has been reset
 
-         function textChanged() {
-           var newText = this.value.trim();
-           var newTags = {};
-           newText.split('\n').forEach(function (row) {
-             var m = row.match(/^\s*([^=]+)=(.*)$/);
+           validator.validate();
+         }); // but not on 'change' (e.g. while drawing)
+         // When user changes editing modes (to catch recent changes e.g. drawing)
 
-             if (m !== null) {
-               var k = context.cleanTagKey(unstringify(m[1].trim()));
-               var v = context.cleanTagValue(unstringify(m[2].trim()));
-               newTags[k] = v;
-             }
+         context.on('exit.validator', validator.validate); // When merging fetched data, validate base graph:
+
+         context.history().on('merge.validator', function (entities) {
+           if (!entities) return; // Make sure the caches have graphs assigned to them.
+           // (we don't do this in `reset` because context is still resetting things and `history.base()` is unstable then)
+
+           var baseGraph = context.history().base();
+           if (!_headCache.graph) _headCache.graph = baseGraph;
+           if (!_baseCache.graph) _baseCache.graph = baseGraph;
+           var entityIDs = entities.map(function (entity) {
+             return entity.id;
            });
-           var tagDiff = utilTagDiff(_tags, newTags);
-           if (!tagDiff.length) return;
-           _pendingChange = _pendingChange || {};
-           tagDiff.forEach(function (change) {
-             if (isReadOnly({
-               key: change.key
-             })) return; // skip unchanged multiselection placeholders
+           entityIDs = _baseCache.withAllRelatedEntities(entityIDs); // expand set
+
+           validateEntitiesAsync(entityIDs, _baseCache);
+         }); // `validateEntity()`   (private)
+         // Runs all validation rules on a single entity.
+         // Some things to note:
+         //  - Graph is passed in from whenever the validation was started.  Validators shouldn't use
+         //   `context.graph()` because this all happens async, and the graph might have changed
+         //   (for example, nodes getting deleted before the validation can run)
+         //  - Validator functions may still be waiting on something and return a "provisional" result.
+         //    In this situation, we will schedule to revalidate the entity sometime later.
+         //
+         // Arguments
+         //   `entity` - The entity
+         //   `graph` - graph containing the entity
+         //
+         // Returns
+         //   Object result like:
+         //   {
+         //     issues:       Array of detected issues
+         //     provisional:  `true` if provisional result, `false` if final result
+         //   }
+         //
 
-             if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
+         function validateEntity(entity, graph) {
+           var result = {
+             issues: [],
+             provisional: false
+           };
+           Object.keys(_rules).forEach(runValidation); // run all rules
 
-             if (change.type === '-') {
-               _pendingChange[change.key] = undefined;
-             } else if (change.type === '+') {
-               _pendingChange[change.key] = change.newVal || '';
+           return result; // runs validation and appends resulting issues
+
+           function runValidation(key) {
+             var fn = _rules[key];
+
+             if (typeof fn !== 'function') {
+               console.error('no such validation rule = ' + key); // eslint-disable-line no-console
+
+               return;
              }
-           });
 
-           if (Object.keys(_pendingChange).length === 0) {
-             _pendingChange = null;
-             return;
-           }
+             var detected = fn(entity, graph);
 
-           scheduleChange();
-         }
+             if (detected.provisional) {
+               // this validation should be run again later
+               result.provisional = true;
+             }
 
-         function pushMore(d3_event) {
-           // if pressing Tab on the last value field with content, add a blank row
-           if (d3_event.keyCode === 9 && !d3_event.shiftKey && section.selection().selectAll('.tag-list li:last-child input.value').node() === this && utilGetSetValue(select(this))) {
-             addTag();
-           }
-         }
+             detected = detected.filter(applySeverityOverrides);
+             result.issues = result.issues.concat(detected); // If there are any override rules that match the issue type/subtype,
+             // adjust severity (or disable it) and keep/discard as quickly as possible.
 
-         function bindTypeahead(key, value) {
-           if (isReadOnly(key.datum())) return;
+             function applySeverityOverrides(issue) {
+               var type = issue.type;
+               var subtype = issue.subtype || '';
+               var i;
 
-           if (Array.isArray(value.datum().value)) {
-             value.call(uiCombobox(context, 'tag-value').minItems(1).fetcher(function (value, callback) {
-               var keyString = utilGetSetValue(key);
-               if (!_tags[keyString]) return;
+               for (i = 0; i < _errorOverrides.length; i++) {
+                 if (_errorOverrides[i].type.test(type) && _errorOverrides[i].subtype.test(subtype)) {
+                   issue.severity = 'error';
+                   return true;
+                 }
+               }
 
-               var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
-                 return {
-                   value: tagValue,
-                   title: tagValue
-                 };
-               });
+               for (i = 0; i < _warningOverrides.length; i++) {
+                 if (_warningOverrides[i].type.test(type) && _warningOverrides[i].subtype.test(subtype)) {
+                   issue.severity = 'warning';
+                   return true;
+                 }
+               }
 
-               callback(data);
-             }));
-             return;
+               for (i = 0; i < _disableOverrides.length; i++) {
+                 if (_disableOverrides[i].type.test(type) && _disableOverrides[i].subtype.test(subtype)) {
+                   return false;
+                 }
+               }
+
+               return true;
+             }
            }
+         } // `updateResolvedIssues()`   (private)
+         // Determine if any issues were resolved for the given entities.
+         // This is called by `validate()` after validation of the head graph
+         //
+         // Give the user credit for fixing an issue if:
+         // - the issue is in the base cache
+         // - the issue is not in the head cache
+         // - the user did something to one of the entities involved in the issue
+         //
+         // Arguments
+         //   `entityIDs` - Array or Set containing entity IDs.
+         //
 
-           var geometry = context.graph().geometry(_entityIDs[0]);
-           key.call(uiCombobox(context, 'tag-key').fetcher(function (value, callback) {
-             taginfo.keys({
-               debounce: true,
-               geometry: geometry,
-               query: value
-             }, function (err, data) {
-               if (!err) {
-                 var filtered = data.filter(function (d) {
-                   return _tags[d.value] === undefined;
-                 });
-                 callback(sort(value, filtered));
-               }
-             });
-           }));
-           value.call(uiCombobox(context, 'tag-value').fetcher(function (value, callback) {
-             taginfo.values({
-               debounce: true,
-               key: utilGetSetValue(key),
-               geometry: geometry,
-               query: value
-             }, function (err, data) {
-               if (!err) callback(sort(value, data));
-             });
-           }));
 
-           function sort(value, data) {
-             var sameletter = [];
-             var other = [];
+         function updateResolvedIssues(entityIDs) {
+           entityIDs.forEach(function (entityID) {
+             var baseIssues = _baseCache.issuesByEntityID[entityID];
+             if (!baseIssues) return;
+             baseIssues.forEach(function (issueID) {
+               // Check if the user did something to one of the entities involved in this issue.
+               // (This issue could involve multiple entities, e.g. disconnected routable features)
+               var issue = _baseCache.issuesByIssueID[issueID];
+               var userModified = (issue.entityIds || []).some(function (id) {
+                 return _completeDiff.hasOwnProperty(id);
+               });
 
-             for (var i = 0; i < data.length; i++) {
-               if (data[i].value.substring(0, value.length) === value) {
-                 sameletter.push(data[i]);
+               if (userModified && !_headCache.issuesByIssueID[issueID]) {
+                 // issue seems fixed
+                 _resolvedIssueIDs.add(issueID);
                } else {
-                 other.push(data[i]);
+                 // issue still not resolved
+                 _resolvedIssueIDs["delete"](issueID); // (did undo, or possibly fixed and then re-caused the issue)
+
                }
-             }
+             });
+           });
+         } // `validateEntitiesAsync()`   (private)
+         // Schedule validation for many entities.
+         //
+         // Arguments
+         //   `entityIDs` - Array or Set containing entityIDs.
+         //   `graph` - the graph to validate that contains those entities
+         //   `cache` - the cache to store results in (_headCache or _baseCache)
+         //
+         // Returns
+         //   A Promise fulfilled when the validation has completed.
+         //   This may take time but happen in the background during browser idle time.
+         //
 
-             return sameletter.concat(other);
-           }
-         }
 
-         function unbind() {
-           var row = select(this);
-           row.selectAll('input.key').call(uiCombobox.off, context);
-           row.selectAll('input.value').call(uiCombobox.off, context);
-         }
+         function validateEntitiesAsync(entityIDs, cache) {
+           // Enqueue the work
+           var jobs = Array.from(entityIDs).map(function (entityID) {
+             if (cache.queuedEntityIDs.has(entityID)) return null; // queued already
 
-         function keyChange(d3_event, d) {
-           if (select(this).attr('readonly')) return;
-           var kOld = d.key; // exit if we are currently about to delete this row anyway - #6366
+             cache.queuedEntityIDs.add(entityID); // Clear caches for existing issues related to this entity
 
-           if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) return;
-           var kNew = context.cleanTagKey(this.value.trim()); // allow no change if the key should be readonly
+             cache.uncacheEntityID(entityID);
+             return function () {
+               cache.queuedEntityIDs["delete"](entityID);
+               var graph = cache.graph;
+               if (!graph) return; // was reset?
 
-           if (isReadOnly({
-             key: kNew
-           })) {
-             this.value = kOld;
-             return;
-           }
+               var entity = graph.hasEntity(entityID); // Sanity check: don't validate deleted entities
 
-           if (kNew && kNew !== kOld && _tags[kNew] !== undefined) {
-             // new key is already in use, switch focus to the existing row
-             this.value = kOld; // reset the key
+               if (!entity) return; // detect new issues and update caches
 
-             section.selection().selectAll('.tag-list input.value').each(function (d) {
-               if (d.key === kNew) {
-                 // send focus to that other value combo instead
-                 var input = select(this).node();
-                 input.focus();
-                 input.select();
+               var result = validateEntity(entity, graph);
+
+               if (result.provisional) {
+                 // provisional result
+                 cache.provisionalEntityIDs.add(entityID); // we'll need to revalidate this entity again later
                }
-             });
-             return;
-           }
 
-           var row = this.parentNode.parentNode;
-           var inputVal = select(row).selectAll('input.value');
-           var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
-           _pendingChange = _pendingChange || {};
+               cache.cacheIssues(result.issues); // update cache
+             };
+           }).filter(Boolean); // Perform the work in chunks.
+           // Because this will happen during idle callbacks, we want to choose a chunk size
+           // that won't make the browser stutter too badly.
 
-           if (kOld) {
-             _pendingChange[kOld] = undefined;
-           }
+           cache.queue = cache.queue.concat(utilArrayChunk(jobs, 100)); // Perform the work
 
-           _pendingChange[kNew] = vNew; // update the ordered key index so this row doesn't change position
+           if (cache.queuePromise) return cache.queuePromise;
+           cache.queuePromise = processQueue(cache).then(function () {
+             return revalidateProvisionalEntities(cache);
+           })["catch"](function () {
+             /* ignore */
+           })["finally"](function () {
+             return cache.queuePromise = null;
+           });
+           return cache.queuePromise;
+         } // `revalidateProvisionalEntities()`   (private)
+         // Sometimes a validator will return a "provisional" result.
+         // In this situation, we'll need to revalidate the entity later.
+         // This function waits a delay, then places them back into the validation queue.
+         //
+         // Arguments
+         //   `cache` - The cache (_headCache or _baseCache)
+         //
 
-           var existingKeyIndex = _orderedKeys.indexOf(kOld);
 
-           if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
-           d.key = kNew; // update datum to avoid exit/enter on tag update
+         function revalidateProvisionalEntities(cache) {
+           if (!cache.provisionalEntityIDs.size) return; // nothing to do
 
-           d.value = vNew;
-           this.value = kNew;
-           utilGetSetValue(inputVal, vNew);
-           scheduleChange();
-         }
+           var handle = window.setTimeout(function () {
+             _deferredST["delete"](handle);
 
-         function valueChange(d3_event, d) {
-           if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
+             if (!cache.provisionalEntityIDs.size) return; // nothing to do
 
-           if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
+             validateEntitiesAsync(Array.from(cache.provisionalEntityIDs), cache);
+           }, RETRY);
 
-           if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
-           _pendingChange = _pendingChange || {};
-           _pendingChange[d.key] = context.cleanTagValue(this.value);
-           scheduleChange();
-         }
+           _deferredST.add(handle);
+         } // `processQueue(queue)`   (private)
+         // Process the next chunk of deferred validation work
+         //
+         // Arguments
+         //   `cache` - The cache (_headCache or _baseCache)
+         //
+         // Returns
+         //   A Promise fulfilled when the validation has completed.
+         //   This may take time but happen in the background during browser idle time.
+         //
 
-         function removeTag(d3_event, d) {
-           if (isReadOnly(d)) return;
 
-           if (d.key === '') {
-             // removing the blank row
-             _showBlank = false;
-             section.reRender();
-           } else {
-             // remove the key from the ordered key index
-             _orderedKeys = _orderedKeys.filter(function (key) {
-               return key !== d.key;
-             });
-             _pendingChange = _pendingChange || {};
-             _pendingChange[d.key] = undefined;
-             scheduleChange();
-           }
-         }
+         function processQueue(cache) {
+           // console.log(`${cache.which} queue length ${cache.queue.length}`);
+           if (!cache.queue.length) return Promise.resolve(); // we're done
 
-         function addTag() {
-           // Delay render in case this click is blurring an edited combo.
-           // Without the setTimeout, the `content` render would wipe out the pending tag change.
-           window.setTimeout(function () {
-             _showBlank = true;
-             section.reRender();
-             section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
-           }, 20);
-         }
+           var chunk = cache.queue.pop();
+           return new Promise(function (resolvePromise) {
+             var handle = window.requestIdleCallback(function () {
+               _deferredRIC["delete"](handle); // const t0 = performance.now();
 
-         function scheduleChange() {
-           // Cache IDs in case the editor is reloaded before the change event is called. - #6028
-           var entityIDs = _entityIDs; // Delay change in case this change is blurring an edited combo. - #5878
 
-           window.setTimeout(function () {
-             if (!_pendingChange) return;
-             dispatch$1.call('change', this, entityIDs, _pendingChange);
-             _pendingChange = null;
-           }, 10);
-         }
+               chunk.forEach(function (job) {
+                 return job();
+               }); // const t1 = performance.now();
+               // console.log('chunk processed in ' + (t1 - t0) + ' ms');
 
-         section.state = function (val) {
-           if (!arguments.length) return _state;
+               resolvePromise();
+             });
 
-           if (_state !== val) {
-             _orderedKeys = [];
-             _state = val;
-           }
+             _deferredRIC.add(handle);
+           }).then(function () {
+             // dispatch an event sometimes to redraw various UI things
+             if (cache.queue.length % 25 === 0) dispatch.call('validated');
+           }).then(function () {
+             return processQueue(cache);
+           });
+         }
 
-           return section;
-         };
+         return validator;
+       } // `validationCache()`   (private)
+       // Creates a cache to store validation state
+       // We create 2 of these:
+       //   `_baseCache` for validation on the base graph (unedited)
+       //   `_headCache` for validation on the head graph (user edits applied)
+       //
+       // Arguments
+       //   `which` - just a String 'base' or 'head' to keep track of it
+       //
 
-         section.presets = function (val) {
-           if (!arguments.length) return _presets;
-           _presets = val;
+       function validationCache(which) {
+         var cache = {
+           which: which,
+           graph: null,
+           queue: [],
+           queuePromise: null,
+           queuedEntityIDs: new Set(),
+           provisionalEntityIDs: new Set(),
+           issuesByIssueID: {},
+           // issue.id -> issue
+           issuesByEntityID: {} // entity.id -> Set(issue.id)
 
-           if (_presets && _presets.length && _presets[0].isFallback()) {
-             section.disclosureExpanded(true); // don't collapse the disclosure if the mapper used the raw tag editor - #1881
-           } else if (!_didInteract) {
-             section.disclosureExpanded(null);
-           }
+         };
 
-           return section;
+         cache.cacheIssue = function (issue) {
+           (issue.entityIds || []).forEach(function (entityID) {
+             if (!cache.issuesByEntityID[entityID]) {
+               cache.issuesByEntityID[entityID] = new Set();
+             }
+
+             cache.issuesByEntityID[entityID].add(issue.id);
+           });
+           cache.issuesByIssueID[issue.id] = issue;
          };
 
-         section.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val;
-           return section;
+         cache.uncacheIssue = function (issue) {
+           (issue.entityIds || []).forEach(function (entityID) {
+             if (cache.issuesByEntityID[entityID]) {
+               cache.issuesByEntityID[entityID]["delete"](issue.id);
+             }
+           });
+           delete cache.issuesByIssueID[issue.id];
          };
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
+         cache.cacheIssues = function (issues) {
+           issues.forEach(cache.cacheIssue);
+         };
 
-           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-             _entityIDs = val;
-             _orderedKeys = [];
-           }
+         cache.uncacheIssues = function (issues) {
+           issues.forEach(cache.uncacheIssue);
+         };
 
-           return section;
-         }; // pass an array of regular expressions to test against the tag key
+         cache.uncacheIssuesOfType = function (type) {
+           var issuesOfType = Object.values(cache.issuesByIssueID).filter(function (issue) {
+             return issue.type === type;
+           });
+           cache.uncacheIssues(issuesOfType);
+         }; // Remove a single entity and all its related issues from the caches
 
 
-         section.readOnlyTags = function (val) {
-           if (!arguments.length) return _readOnlyTags;
-           _readOnlyTags = val;
-           return section;
-         };
+         cache.uncacheEntityID = function (entityID) {
+           var entityIssueIDs = cache.issuesByEntityID[entityID];
 
-         return utilRebind(section, dispatch$1, 'on');
-       }
+           if (entityIssueIDs) {
+             entityIssueIDs.forEach(function (issueID) {
+               var issue = cache.issuesByIssueID[issueID];
 
-       function uiDataEditor(context) {
-         var dataHeader = uiDataHeader();
-         var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
+               if (issue) {
+                 cache.uncacheIssue(issue);
+               } else {
+                 // shouldn't happen, clean up
+                 delete cache.issuesByIssueID[issueID];
+               }
+             });
+           }
 
-         var _datum;
+           delete cache.issuesByEntityID[entityID];
+           cache.provisionalEntityIDs["delete"](entityID);
+         }; // Return the expandeded set of entityIDs related to issues for the given entityIDs
+         //
+         // Arguments
+         //   `entityIDs` - Array or Set containing entityIDs.
+         //
 
-         function dataEditor(selection) {
-           var header = selection.selectAll('.header').data([0]);
-           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
-           headerEnter.append('button').attr('class', 'close').on('click', function () {
-             context.enter(modeBrowse(context));
-           }).call(svgIcon('#iD-icon-close'));
-           headerEnter.append('h3').html(_t.html('map_data.title'));
-           var body = selection.selectAll('.body').data([0]);
-           body = body.enter().append('div').attr('class', 'body').merge(body);
-           var editor = body.selectAll('.data-editor').data([0]); // enter/update
 
-           editor.enter().append('div').attr('class', 'modal-section data-editor').merge(editor).call(dataHeader.datum(_datum));
-           var rte = body.selectAll('.raw-tag-editor').data([0]); // enter/update
+         cache.withAllRelatedEntities = function (entityIDs) {
+           var result = new Set();
+           (entityIDs || []).forEach(function (entityID) {
+             result.add(entityID); // include self
 
-           rte.enter().append('div').attr('class', 'raw-tag-editor data-editor').merge(rte).call(rawTagEditor.tags(_datum && _datum.properties || {}).state('hover').render).selectAll('textarea.tag-text').attr('readonly', true).classed('readonly', true);
-         }
+             var entityIssueIDs = cache.issuesByEntityID[entityID];
 
-         dataEditor.datum = function (val) {
-           if (!arguments.length) return _datum;
-           _datum = val;
-           return this;
+             if (entityIssueIDs) {
+               entityIssueIDs.forEach(function (issueID) {
+                 var issue = cache.issuesByIssueID[issueID];
+
+                 if (issue) {
+                   (issue.entityIds || []).forEach(function (relatedID) {
+                     return result.add(relatedID);
+                   });
+                 } else {
+                   // shouldn't happen, clean up
+                   delete cache.issuesByIssueID[issueID];
+                 }
+               });
+             }
+           });
+           return result;
          };
 
-         return dataEditor;
+         return cache;
        }
 
-       function modeSelectData(context, selectedDatum) {
-         var mode = {
-           id: 'select-data',
-           button: 'browse'
+       function coreUploader(context) {
+         var dispatch = dispatch$8( // Start and end events are dispatched exactly once each per legitimate outside call to `save`
+         'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
+         'saveEnded', // dispatched after the result event has been dispatched
+         'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
+         'progressChanged', // Each save results in one of these outcomes:
+         'resultNoChanges', // upload wasn't attempted since there were no edits
+         'resultErrors', // upload failed due to errors
+         'resultConflicts', // upload failed due to data conflicts
+         'resultSuccess' // upload completed without errors
+         );
+         var _isSaving = false;
+         var _conflicts = [];
+         var _errors = [];
+
+         var _origChanges;
+
+         var _discardTags = {};
+         _mainFileFetcher.get('discarded').then(function (d) {
+           _discardTags = d;
+         })["catch"](function () {
+           /* ignore */
+         });
+         var uploader = utilRebind({}, dispatch, 'on');
+
+         uploader.isSaving = function () {
+           return _isSaving;
          };
-         var keybinding = utilKeybinding('select-data');
-         var dataEditor = uiDataEditor(context);
-         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior]; // class the data as selected, or return to browse mode if the data is gone
 
-         function selectData(d3_event, drawn) {
-           var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
+         uploader.save = function (changeset, tryAgain, checkConflicts) {
+           // Guard against accidentally entering save code twice - #4641
+           if (_isSaving && !tryAgain) {
+             return;
+           }
 
-           if (selection.empty()) {
-             // Return to browse mode if selected DOM elements have
-             // disappeared because the user moved them out of view..
-             var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
+           var osm = context.connection();
+           if (!osm) return; // If user somehow got logged out mid-save, try to reauthenticate..
+           // This can happen if they were logged in from before, but the tokens are no longer valid.
 
-             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-               context.enter(modeBrowse(context));
-             }
-           } else {
-             selection.classed('selected', true);
+           if (!osm.authenticated()) {
+             osm.authenticate(function (err) {
+               if (!err) {
+                 uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
+               }
+             });
+             return;
            }
-         }
 
-         function esc() {
-           if (context.container().select('.combobox').size()) return;
-           context.enter(modeBrowse(context));
-         }
+           if (!_isSaving) {
+             _isSaving = true;
+             dispatch.call('saveStarted', this);
+           }
 
-         mode.zoomToSelected = function () {
-           var extent = geoExtent(d3_geoBounds(selectedDatum));
-           context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
-         };
+           var history = context.history();
+           _conflicts = [];
+           _errors = []; // Store original changes, in case user wants to download them as an .osc file
 
-         mode.enter = function () {
-           behaviors.forEach(context.install);
-           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
-           select(document).call(keybinding);
-           selectData();
-           var sidebar = context.ui().sidebar;
-           sidebar.show(dataEditor.datum(selectedDatum)); // expand the sidebar, avoid obscuring the data if needed
+           _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags)); // First time, `history.perform` a no-op action.
+           // Any conflict resolutions will be done as `history.replace`
+           // Remember to pop this later if needed
 
-           var extent = geoExtent(d3_geoBounds(selectedDatum));
-           sidebar.expand(sidebar.intersects(extent));
-           context.map().on('drawn.select-data', selectData);
-         };
+           if (!tryAgain) {
+             history.perform(actionNoop());
+           } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
 
-         mode.exit = function () {
-           behaviors.forEach(context.uninstall);
-           select(document).call(keybinding.unbind);
-           context.surface().selectAll('.layer-mapdata .selected').classed('selected hover', false);
-           context.map().on('drawn.select-data', null);
-           context.ui().sidebar.hide();
+
+           if (!checkConflicts) {
+             upload(changeset); // Do the full (slow) conflict check..
+           } else {
+             performFullConflictCheck(changeset);
+           }
          };
 
-         return mode;
-       }
+         function performFullConflictCheck(changeset) {
+           var osm = context.connection();
+           if (!osm) return;
+           var history = context.history();
+           var localGraph = context.graph();
+           var remoteGraph = coreGraph(history.base(), true);
+           var summary = history.difference().summary();
+           var _toCheck = [];
 
-       function uiImproveOsmComments() {
-         var _qaItem;
+           for (var i = 0; i < summary.length; i++) {
+             var item = summary[i];
 
-         function issueComments(selection) {
-           // make the div immediately so it appears above the buttons
-           var comments = selection.selectAll('.comments-container').data([0]);
-           comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments); // must retrieve comments from API before they can be displayed
+             if (item.changeType === 'modified') {
+               _toCheck.push(item.entity.id);
+             }
+           }
 
-           services.improveOSM.getComments(_qaItem).then(function (d) {
-             if (!d.comments) return; // nothing to do here
+           var _toLoad = withChildNodes(_toCheck, localGraph);
 
-             var commentEnter = comments.selectAll('.comment').data(d.comments).enter().append('div').attr('class', 'comment');
-             commentEnter.append('div').attr('class', 'comment-avatar').call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
-             var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
-             var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
-             metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
-               var osm = services.osm;
-               var selection = select(this);
+           var _loaded = {};
+           var _toLoadCount = 0;
+           var _toLoadTotal = _toLoad.length;
 
-               if (osm && d.username) {
-                 selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
-               }
+           if (_toCheck.length) {
+             dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-               selection.html(function (d) {
-                 return d.username;
-               });
-             });
-             metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
-               return _t.html('note.status.commented', {
-                 when: localeDateString(d.timestamp)
-               });
-             });
-             mainEnter.append('div').attr('class', 'comment-text').append('p').html(function (d) {
-               return d.text;
+             _toLoad.forEach(function (id) {
+               _loaded[id] = false;
              });
-           })["catch"](function (err) {
-             console.log(err); // eslint-disable-line no-console
-           });
-         }
 
-         function localeDateString(s) {
-           if (!s) return null;
-           var options = {
-             day: 'numeric',
-             month: 'short',
-             year: 'numeric'
-           };
-           var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
+             osm.loadMultiple(_toLoad, loaded);
+           } else {
+             upload(changeset);
+           }
 
-           if (isNaN(d.getTime())) return null;
-           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-         }
+           return;
 
-         issueComments.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return issueComments;
-         };
+           function withChildNodes(ids, graph) {
+             var s = new Set(ids);
+             ids.forEach(function (id) {
+               var entity = graph.entity(id);
+               if (entity.type !== 'way') return;
+               graph.childNodes(entity).forEach(function (child) {
+                 if (child.version !== undefined) {
+                   s.add(child.id);
+                 }
+               });
+             });
+             return Array.from(s);
+           } // Reload modified entities into an alternate graph and check for conflicts..
 
-         return issueComments;
-       }
 
-       function uiImproveOsmDetails(context) {
-         var _qaItem;
+           function loaded(err, result) {
+             if (_errors.length) return;
 
-         function issueDetail(d) {
-           if (d.desc) return d.desc;
-           var issueKey = d.issueKey;
-           d.replacements = d.replacements || {};
-           d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string
+             if (err) {
+               _errors.push({
+                 msg: err.message || err.responseText,
+                 details: [_t('save.status_code', {
+                   code: err.status
+                 })]
+               });
 
-           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
-         }
+               didResultInErrors();
+             } else {
+               var loadMore = [];
+               result.data.forEach(function (entity) {
+                 remoteGraph.replace(entity);
+                 _loaded[entity.id] = true;
+                 _toLoad = _toLoad.filter(function (val) {
+                   return val !== entity.id;
+                 });
+                 if (!entity.visible) return; // Because loadMultiple doesn't download /full like loadEntity,
+                 // need to also load children that aren't already being checked..
 
-         function improveOsmDetails(selection) {
-           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           });
-           details.exit().remove();
-           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
+                 var i, id;
 
-           var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
-           descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
-           descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
+                 if (entity.type === 'way') {
+                   for (i = 0; i < entity.nodes.length; i++) {
+                     id = entity.nodes[i];
 
-           var relatedEntities = [];
-           descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
-             var link = select(this);
-             var isObjectLink = link.classed('error_object_link');
-             var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
-             var entity = context.hasEntity(entityID);
-             relatedEntities.push(entityID); // Add click handler
+                     if (_loaded[id] === undefined) {
+                       _loaded[id] = false;
+                       loadMore.push(id);
+                     }
+                   }
+                 } else if (entity.type === 'relation' && entity.isMultipolygon()) {
+                   for (i = 0; i < entity.members.length; i++) {
+                     id = entity.members[i].id;
 
-             link.on('mouseenter', function () {
-               utilHighlightEntities([entityID], true, context);
-             }).on('mouseleave', function () {
-               utilHighlightEntities([entityID], false, context);
-             }).on('click', function (d3_event) {
-               d3_event.preventDefault();
-               utilHighlightEntities([entityID], false, context);
-               var osmlayer = context.layers().layer('osm');
+                     if (_loaded[id] === undefined) {
+                       _loaded[id] = false;
+                       loadMore.push(id);
+                     }
+                   }
+                 }
+               });
+               _toLoadCount += result.data.length;
+               _toLoadTotal += loadMore.length;
+               dispatch.call('progressChanged', this, _toLoadCount, _toLoadTotal);
 
-               if (!osmlayer.enabled()) {
-                 osmlayer.enabled(true);
-               }
+               if (loadMore.length) {
+                 _toLoad.push.apply(_toLoad, loadMore);
 
-               context.map().centerZoom(_qaItem.loc, 20);
+                 osm.loadMultiple(loadMore, loaded);
+               }
 
-               if (entity) {
-                 context.enter(modeSelect(context, [entityID]));
-               } else {
-                 context.loadEntity(entityID, function () {
-                   context.enter(modeSelect(context, [entityID]));
-                 });
+               if (!_toLoad.length) {
+                 detectConflicts();
+                 upload(changeset);
                }
-             }); // Replace with friendly name if possible
-             // (The entity may not yet be loaded into the graph)
+             }
+           }
 
-             if (entity) {
-               var name = utilDisplayName(entity); // try to use common name
+           function detectConflicts() {
+             function choice(id, text, _action) {
+               return {
+                 id: id,
+                 text: text,
+                 action: function action() {
+                   history.replace(_action);
+                 }
+               };
+             }
 
-               if (!name && !isObjectLink) {
-                 var preset = _mainPresetIndex.match(entity, context.graph());
-                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-               }
+             function formatUser(d) {
+               return '<a href="' + osm.userURL(d) + '" target="_blank">' + escape$4(d) + '</a>';
+             }
 
-               if (name) {
-                 this.innerText = name;
-               }
+             function entityName(entity) {
+               return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
              }
-           }); // Don't hide entities related to this error - #5880
 
-           context.features().forceVisible(relatedEntities);
-           context.map().pan([0, 0]); // trigger a redraw
-         }
+             function sameVersions(local, remote) {
+               if (local.version !== remote.version) return false;
 
-         improveOsmDetails.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return improveOsmDetails;
-         };
+               if (local.type === 'way') {
+                 var children = utilArrayUnion(local.nodes, remote.nodes);
 
-         return improveOsmDetails;
-       }
+                 for (var i = 0; i < children.length; i++) {
+                   var a = localGraph.hasEntity(children[i]);
+                   var b = remoteGraph.hasEntity(children[i]);
+                   if (a && b && a.version !== b.version) return false;
+                 }
+               }
 
-       function uiImproveOsmHeader() {
-         var _qaItem;
+               return true;
+             }
 
-         function issueTitle(d) {
-           var issueKey = d.issueKey;
-           d.replacements = d.replacements || {};
-           d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string
+             _toCheck.forEach(function (id) {
+               var local = localGraph.entity(id);
+               var remote = remoteGraph.entity(id);
+               if (sameVersions(local, remote)) return;
+               var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
+               history.replace(merge);
+               var mergeConflicts = merge.conflicts();
+               if (!mergeConflicts.length) return; // merged safely
 
-           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
+               var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
+               var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
+               var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
+               var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
+
+               _conflicts.push({
+                 id: id,
+                 name: entityName(local),
+                 details: mergeConflicts,
+                 chosen: 1,
+                 choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
+               });
+             });
+           }
          }
 
-         function improveOsmHeader(selection) {
-           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           });
-           header.exit().remove();
-           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
-           var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
-             return d.id < 0;
-           }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
-             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
-           });
-           svgEnter.append('polygon').attr('fill', 'currentColor').attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-           svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
-             var picon = d.icon;
+         function upload(changeset) {
+           var osm = context.connection();
 
-             if (!picon) {
-               return '';
+           if (!osm) {
+             _errors.push({
+               msg: 'No OSM Service'
+             });
+           }
+
+           if (_conflicts.length) {
+             didResultInConflicts(changeset);
+           } else if (_errors.length) {
+             didResultInErrors();
+           } else {
+             var history = context.history();
+             var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+
+             if (changes.modified.length || changes.created.length || changes.deleted.length) {
+               dispatch.call('willAttemptUpload', this);
+               osm.putChangeset(changeset, changes, uploadCallback);
              } else {
-               var isMaki = /^maki-/.test(picon);
-               return "#".concat(picon).concat(isMaki ? '-11' : '');
+               // changes were insignificant or reverted by user
+               didResultInNoChanges();
              }
-           });
-           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
+           }
          }
 
-         improveOsmHeader.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return improveOsmHeader;
-         };
-
-         return improveOsmHeader;
-       }
-
-       function uiImproveOsmEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiImproveOsmDetails(context);
-         var qaComments = uiImproveOsmComments();
-         var qaHeader = uiImproveOsmHeader();
-
-         var _qaItem;
+         function uploadCallback(err, changeset) {
+           if (err) {
+             if (err.status === 409) {
+               // 409 Conflict
+               uploader.save(changeset, true, true); // tryAgain = true, checkConflicts = true
+             } else {
+               _errors.push({
+                 msg: err.message || err.responseText,
+                 details: [_t('save.status_code', {
+                   code: err.status
+                 })]
+               });
 
-         function improveOsmEditor(selection) {
-           var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
-           headerEnter.append('button').attr('class', 'close').on('click', function () {
-             return context.enter(modeBrowse(context));
-           }).call(svgIcon('#iD-icon-close'));
-           headerEnter.append('h3').html(_t.html('QA.improveOSM.title'));
-           var body = selection.selectAll('.body').data([0]);
-           body = body.enter().append('div').attr('class', 'body').merge(body);
-           var editor = body.selectAll('.qa-editor').data([0]);
-           editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(qaComments.issue(_qaItem)).call(improveOsmSaveSection);
+               didResultInErrors();
+             }
+           } else {
+             didResultInSuccess(changeset);
+           }
          }
 
-         function improveOsmSaveSection(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
-
-           var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
-           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           }); // exit
+         function didResultInNoChanges() {
+           dispatch.call('resultNoChanges', this);
+           endSave();
+           context.flush(); // reset iD
+         }
 
-           saveSection.exit().remove(); // enter
+         function didResultInErrors() {
+           context.history().pop();
+           dispatch.call('resultErrors', this, _errors);
+           endSave();
+         }
 
-           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
-           saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('note.newComment'));
-           saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
-             return d.newComment;
-           }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
+         function didResultInConflicts(changeset) {
+           _conflicts.sort(function (a, b) {
+             return b.id.localeCompare(a.id);
+           });
 
-           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+           dispatch.call('resultConflicts', this, changeset, _conflicts, _origChanges);
+           endSave();
+         }
 
-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim();
+         function didResultInSuccess(changeset) {
+           // delete the edit stack cached to local storage
+           context.history().clearSaved();
+           dispatch.call('resultSuccess', this, changeset); // Add delay to allow for postgres replication #1646 #2678
 
-             if (val === '') {
-               val = undefined;
-             } // store the unsaved comment with the issue itself
+           window.setTimeout(function () {
+             endSave();
+             context.flush(); // reset iD
+           }, 2500);
+         }
 
+         function endSave() {
+           _isSaving = false;
+           dispatch.call('saveEnded', this);
+         }
 
-             _qaItem = _qaItem.update({
-               newComment: val
-             });
-             var qaService = services.improveOSM;
+         uploader.cancelConflictResolution = function () {
+           context.history().pop();
+         };
 
-             if (qaService) {
-               qaService.replaceItem(_qaItem);
-             }
+         uploader.processResolvedConflicts = function (changeset) {
+           var history = context.history();
 
-             saveSection.call(qaSaveButtons);
-           }
-         }
+           for (var i = 0; i < _conflicts.length; i++) {
+             if (_conflicts[i].chosen === 1) {
+               // user chose "use theirs"
+               var entity = context.hasEntity(_conflicts[i].id);
 
-         function qaSaveButtons(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+               if (entity && entity.type === 'way') {
+                 var children = utilArrayUniq(entity.nodes);
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+                 for (var j = 0; j < children.length; j++) {
+                   history.replace(actionRevert(children[j]));
+                 }
+               }
 
-           buttonSection.exit().remove(); // enter
+               history.replace(actionRevert(_conflicts[i].id));
+             }
+           }
 
-           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
-           buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
-           buttonEnter.append('button').attr('class', 'button close-button action');
-           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
+           uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
+         };
 
-           buttonSection = buttonSection.merge(buttonEnter);
-           buttonSection.select('.comment-button').attr('disabled', function (d) {
-             return d.newComment ? null : true;
-           }).on('click.comment', function (d3_event, d) {
-             this.blur(); // avoid keeping focus on the button - #4641
+         uploader.reset = function () {};
 
-             var qaService = services.improveOSM;
+         return uploader;
+       }
 
-             if (qaService) {
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
-           });
-           buttonSection.select('.close-button').html(function (d) {
-             var andComment = d.newComment ? '_comment' : '';
-             return _t.html("QA.keepRight.close".concat(andComment));
-           }).on('click.close', function (d3_event, d) {
-             this.blur(); // avoid keeping focus on the button - #4641
+       var $$2 = _export;
+       var fails = fails$S;
+       var expm1 = mathExpm1;
 
-             var qaService = services.improveOSM;
+       var abs = Math.abs;
+       var exp = Math.exp;
+       var E = Math.E;
 
-             if (qaService) {
-               d.newStatus = 'SOLVED';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
-           });
-           buttonSection.select('.ignore-button').html(function (d) {
-             var andComment = d.newComment ? '_comment' : '';
-             return _t.html("QA.keepRight.ignore".concat(andComment));
-           }).on('click.ignore', function (d3_event, d) {
-             this.blur(); // avoid keeping focus on the button - #4641
+       var FORCED = fails(function () {
+         // eslint-disable-next-line es/no-math-sinh -- required for testing
+         return Math.sinh(-2e-17) != -2e-17;
+       });
 
-             var qaService = services.improveOSM;
+       // `Math.sinh` method
+       // https://tc39.es/ecma262/#sec-math.sinh
+       // V8 near Chromium 38 has a problem with very small numbers
+       $$2({ target: 'Math', stat: true, forced: FORCED }, {
+         sinh: function sinh(x) {
+           return abs(x = +x) < 1 ? (expm1(x) - expm1(-x)) / 2 : (exp(x - 1) - exp(-x - 1)) * (E / 2);
+         }
+       });
 
-             if (qaService) {
-               d.newStatus = 'INVALID';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
-           });
-         } // NOTE: Don't change method name until UI v3 is merged
+       var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2; // listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
 
+       window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function () {
+         isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
+       });
 
-         improveOsmEditor.error = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return improveOsmEditor;
+       function localeDateString(s) {
+         if (!s) return null;
+         var options = {
+           day: 'numeric',
+           month: 'short',
+           year: 'numeric'
          };
-
-         return utilRebind(improveOsmEditor, dispatch$1, 'on');
+         var d = new Date(s);
+         if (isNaN(d.getTime())) return null;
+         return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
        }
 
-       function uiKeepRightDetails(context) {
-         var _qaItem;
-
-         function issueDetail(d) {
-           var itemType = d.itemType,
-               parentIssueType = d.parentIssueType;
-           var unknown = _t.html('inspector.unknown');
-           var replacements = d.replacements || {};
-           replacements["default"] = unknown; // special key `default` works as a fallback string
+       function vintageRange(vintage) {
+         var s;
 
-           var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
+         if (vintage.start || vintage.end) {
+           s = vintage.start || '?';
 
-           if (detail === unknown) {
-             detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
+           if (vintage.start !== vintage.end) {
+             s += ' - ' + (vintage.end || '?');
            }
-
-           return detail;
          }
 
-         function keepRightDetails(selection) {
-           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           });
-           details.exit().remove();
-           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
+         return s;
+       }
 
-           var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
-           descriptionEnter.append('h4').html(_t.html('QA.keepRight.detail_description'));
-           descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
+       function rendererBackgroundSource(data) {
+         var source = Object.assign({}, data); // shallow copy
 
-           var relatedEntities = [];
-           descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
-             var link = select(this);
-             var isObjectLink = link.classed('error_object_link');
-             var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
-             var entity = context.hasEntity(entityID);
-             relatedEntities.push(entityID); // Add click handler
+         var _offset = [0, 0];
+         var _name = source.name;
+         var _description = source.description;
 
-             link.on('mouseenter', function () {
-               utilHighlightEntities([entityID], true, context);
-             }).on('mouseleave', function () {
-               utilHighlightEntities([entityID], false, context);
-             }).on('click', function (d3_event) {
-               d3_event.preventDefault();
-               utilHighlightEntities([entityID], false, context);
-               var osmlayer = context.layers().layer('osm');
+         var _best = !!source.best;
 
-               if (!osmlayer.enabled()) {
-                 osmlayer.enabled(true);
-               }
+         var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
 
-               context.map().centerZoomEase(_qaItem.loc, 20);
+         source.tileSize = data.tileSize || 256;
+         source.zoomExtent = data.zoomExtent || [0, 22];
+         source.overzoom = data.overzoom !== false;
 
-               if (entity) {
-                 context.enter(modeSelect(context, [entityID]));
-               } else {
-                 context.loadEntity(entityID, function () {
-                   context.enter(modeSelect(context, [entityID]));
-                 });
-               }
-             }); // Replace with friendly name if possible
-             // (The entity may not yet be loaded into the graph)
+         source.offset = function (val) {
+           if (!arguments.length) return _offset;
+           _offset = val;
+           return source;
+         };
 
-             if (entity) {
-               var name = utilDisplayName(entity); // try to use common name
+         source.nudge = function (val, zoomlevel) {
+           _offset[0] += val[0] / Math.pow(2, zoomlevel);
+           _offset[1] += val[1] / Math.pow(2, zoomlevel);
+           return source;
+         };
 
-               if (!name && !isObjectLink) {
-                 var preset = _mainPresetIndex.match(entity, context.graph());
-                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-               }
+         source.name = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t('imagery.' + id_safe + '.name', {
+             "default": lodash.exports.escape(_name)
+           });
+         };
 
-               if (name) {
-                 this.innerText = name;
-               }
-             }
-           }); // Don't hide entities related to this issue - #5880
+         source.label = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t.html('imagery.' + id_safe + '.name', {
+             "default": lodash.exports.escape(_name)
+           });
+         };
 
-           context.features().forceVisible(relatedEntities);
-           context.map().pan([0, 0]); // trigger a redraw
-         }
+         source.description = function () {
+           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
+           return _t.html('imagery.' + id_safe + '.description', {
+             "default": lodash.exports.escape(_description)
+           });
+         };
 
-         keepRightDetails.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return keepRightDetails;
+         source.best = function () {
+           return _best;
          };
 
-         return keepRightDetails;
-       }
+         source.area = function () {
+           if (!data.polygon) return Number.MAX_VALUE; // worldwide
 
-       function uiKeepRightHeader() {
-         var _qaItem;
+           var area = d3_geoArea({
+             type: 'MultiPolygon',
+             coordinates: [data.polygon]
+           });
+           return isNaN(area) ? 0 : area;
+         };
 
-         function issueTitle(d) {
-           var itemType = d.itemType,
-               parentIssueType = d.parentIssueType;
-           var unknown = _t.html('inspector.unknown');
-           var replacements = d.replacements || {};
-           replacements["default"] = unknown; // special key `default` works as a fallback string
+         source.imageryUsed = function () {
+           return _name || source.id;
+         };
 
-           var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
+         source.template = function (val) {
+           if (!arguments.length) return _template;
 
-           if (title === unknown) {
-             title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
+           if (source.id === 'custom' || source.id === 'Bing') {
+             _template = val;
            }
 
-           return title;
-         }
+           return source;
+         };
 
-         function keepRightHeader(selection) {
-           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           });
-           header.exit().remove();
-           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
-           var iconEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
-             return d.id < 0;
-           });
-           iconEnter.append('div').attr('class', function (d) {
-             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
-           }).call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
-           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
-         }
+         source.url = function (coord) {
+           var result = _template;
+           if (result === '') return result; // source 'none'
+           // Guess a type based on the tokens present in the template
+           // (This is for 'custom' source, where we don't know)
 
-         keepRightHeader.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return keepRightHeader;
-         };
+           if (!source.type || source.id === 'custom') {
+             if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
+               source.type = 'wms';
+               source.projection = 'EPSG:3857'; // guess
+             } else if (/\{(x|y)\}/.test(_template)) {
+               source.type = 'tms';
+             } else if (/\{u\}/.test(_template)) {
+               source.type = 'bing';
+             }
+           }
 
-         return keepRightHeader;
-       }
+           if (source.type === 'wms') {
+             var tileToProjectedCoords = function tileToProjectedCoords(x, y, z) {
+               //polyfill for IE11, PhantomJS
+               var sinh = Math.sinh || function (x) {
+                 var y = Math.exp(x);
+                 return (y - 1 / y) / 2;
+               };
 
-       function uiViewOnKeepRight() {
-         var _qaItem;
+               var zoomSize = Math.pow(2, z);
+               var lon = x / zoomSize * Math.PI * 2 - Math.PI;
+               var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
 
-         function viewOnKeepRight(selection) {
-           var url;
+               switch (source.projection) {
+                 case 'EPSG:4326':
+                   return {
+                     x: lon * 180 / Math.PI,
+                     y: lat * 180 / Math.PI
+                   };
 
-           if (services.keepRight && _qaItem instanceof QAItem) {
-             url = services.keepRight.issueURL(_qaItem);
-           }
+                 default:
+                   // EPSG:3857 and synonyms
+                   var mercCoords = mercatorRaw(lon, lat);
+                   return {
+                     x: 20037508.34 / Math.PI * mercCoords[0],
+                     y: 20037508.34 / Math.PI * mercCoords[1]
+                   };
+               }
+             };
 
-           var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
+             var tileSize = source.tileSize;
+             var projection = source.projection;
+             var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
+             var maxXminY = tileToProjectedCoords(coord[0] + 1, coord[1] + 1, coord[2]);
+             result = result.replace(/\{(\w+)\}/g, function (token, key) {
+               switch (key) {
+                 case 'width':
+                 case 'height':
+                   return tileSize;
 
-           link.exit().remove(); // enter
+                 case 'proj':
+                   return projection;
 
-           var linkEnter = link.enter().append('a').attr('class', 'view-on-keepRight').attr('target', '_blank').attr('rel', 'noopener') // security measure
-           .attr('href', function (d) {
-             return d;
-           }).call(svgIcon('#iD-icon-out-link', 'inline'));
-           linkEnter.append('span').html(_t.html('inspector.view_on_keepRight'));
-         }
+                 case 'wkid':
+                   return projection.replace(/^EPSG:/, '');
 
-         viewOnKeepRight.what = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return viewOnKeepRight;
-         };
+                 case 'bbox':
+                   // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
+                   if (projection === 'EPSG:4326' && // The CRS parameter implies version 1.3 (prior versions use SRS)
+                   /VERSION=1.3|CRS={proj}/.test(source.template().toUpperCase())) {
+                     return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
+                   } else {
+                     return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
+                   }
 
-         return viewOnKeepRight;
-       }
+                 case 'w':
+                   return minXmaxY.x;
 
-       function uiKeepRightEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiKeepRightDetails(context);
-         var qaHeader = uiKeepRightHeader();
+                 case 's':
+                   return maxXminY.y;
 
-         var _qaItem;
+                 case 'n':
+                   return maxXminY.x;
 
-         function keepRightEditor(selection) {
-           var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
-           headerEnter.append('button').attr('class', 'close').on('click', function () {
-             return context.enter(modeBrowse(context));
-           }).call(svgIcon('#iD-icon-close'));
-           headerEnter.append('h3').html(_t.html('QA.keepRight.title'));
-           var body = selection.selectAll('.body').data([0]);
-           body = body.enter().append('div').attr('class', 'body').merge(body);
-           var editor = body.selectAll('.qa-editor').data([0]);
-           editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(keepRightSaveSection);
-           var footer = selection.selectAll('.footer').data([0]);
-           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnKeepRight().what(_qaItem));
-         }
+                 case 'e':
+                   return minXmaxY.y;
 
-         function keepRightSaveSection(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+                 default:
+                   return token;
+               }
+             });
+           } else if (source.type === 'tms') {
+             result = result.replace('{x}', coord[0]).replace('{y}', coord[1]) // TMS-flipped y coordinate
+             .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1).replace(/\{z(oom)?\}/, coord[2]) // only fetch retina tiles for retina screens
+             .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
+           } else if (source.type === 'bing') {
+             result = result.replace('{u}', function () {
+               var u = '';
 
-           var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
-           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           }); // exit
+               for (var zoom = coord[2]; zoom > 0; zoom--) {
+                 var b = 0;
+                 var mask = 1 << zoom - 1;
+                 if ((coord[0] & mask) !== 0) b++;
+                 if ((coord[1] & mask) !== 0) b += 2;
+                 u += b.toString();
+               }
 
-           saveSection.exit().remove(); // enter
+               return u;
+             });
+           } // these apply to any type..
 
-           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
-           saveSectionEnter.append('h4').attr('class', '.qa-save-header').html(_t.html('QA.keepRight.comment'));
-           saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
-             return d.newComment || d.comment;
-           }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
 
-           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+           result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
+             var subdomains = r.split(',');
+             return subdomains[(coord[0] + coord[1]) % subdomains.length];
+           });
+           return result;
+         };
 
-           function changeInput() {
-             var input = select(this);
-             var val = input.property('value').trim();
+         source.validZoom = function (z) {
+           return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
+         };
 
-             if (val === _qaItem.comment) {
-               val = undefined;
-             } // store the unsaved comment with the issue itself
+         source.isLocatorOverlay = function () {
+           return source.id === 'mapbox_locator_overlay';
+         };
+         /* hides a source from the list, but leaves it available for use */
 
 
-             _qaItem = _qaItem.update({
-               newComment: val
-             });
-             var qaService = services.keepRight;
+         source.isHidden = function () {
+           return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
+         };
 
-             if (qaService) {
-               qaService.replaceItem(_qaItem); // update keepright cache
-             }
+         source.copyrightNotices = function () {};
 
-             saveSection.call(qaSaveButtons);
-           }
-         }
+         source.getMetadata = function (center, tileCoord, callback) {
+           var vintage = {
+             start: localeDateString(source.startDate),
+             end: localeDateString(source.endDate)
+           };
+           vintage.range = vintageRange(vintage);
+           var metadata = {
+             vintage: vintage
+           };
+           callback(null, metadata);
+         };
 
-         function qaSaveButtons(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+         return source;
+       }
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+       rendererBackgroundSource.Bing = function (data, dispatch) {
+         // https://docs.microsoft.com/en-us/bingmaps/rest-services/imagery/get-imagery-metadata
+         // https://docs.microsoft.com/en-us/bingmaps/rest-services/directly-accessing-the-bing-maps-tiles
+         //fallback url template
+         data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&n=z';
+         var bing = rendererBackgroundSource(data); //var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
+
+         var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
+
+         /*
+         missing tile image strictness param (n=)
+         •   n=f -> (Fail) returns a 404
+         •   n=z -> (Empty) returns a 200 with 0 bytes (no content)
+         •   n=t -> (Transparent) returns a 200 with a transparent (png) tile
+         */
+
+         var strictParam = 'n';
+         var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&uriScheme=https&key=' + key;
+         var cache = {};
+         var inflight = {};
+         var providers = [];
+         d3_json(url).then(function (json) {
+           var imageryResource = json.resourceSets[0].resources[0]; //retrieve and prepare up to date imagery template
 
-           buttonSection.exit().remove(); // enter
+           var template = imageryResource.imageUrl; //https://ecn.{subdomain}.tiles.virtualearth.net/tiles/a{quadkey}.jpeg?g=10339
 
-           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
-           buttonEnter.append('button').attr('class', 'button comment-button action').html(_t.html('QA.keepRight.save_comment'));
-           buttonEnter.append('button').attr('class', 'button close-button action');
-           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
+           var subDomains = imageryResource.imageUrlSubdomains; //["t0, t1, t2, t3"]
 
-           buttonSection = buttonSection.merge(buttonEnter);
-           buttonSection.select('.comment-button') // select and propagate data
-           .attr('disabled', function (d) {
-             return d.newComment ? null : true;
-           }).on('click.comment', function (d3_event, d) {
-             this.blur(); // avoid keeping focus on the button - #4641
+           var subDomainNumbers = subDomains.map(function (subDomain) {
+             return subDomain.substring(1);
+           }).join(',');
+           template = template.replace('{subdomain}', "t{switch:".concat(subDomainNumbers, "}")).replace('{quadkey}', '{u}');
 
-             var qaService = services.keepRight;
+           if (!new URLSearchParams(template).has(strictParam)) {
+             template += "&".concat(strictParam, "=z");
+           }
 
-             if (qaService) {
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
+           bing.template(template);
+           providers = imageryResource.imageryProviders.map(function (provider) {
+             return {
+               attribution: provider.attribution,
+               areas: provider.coverageAreas.map(function (area) {
+                 return {
+                   zoom: [area.zoomMin, area.zoomMax],
+                   extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
+                 };
+               })
+             };
            });
-           buttonSection.select('.close-button') // select and propagate data
-           .html(function (d) {
-             var andComment = d.newComment ? '_comment' : '';
-             return _t.html("QA.keepRight.close".concat(andComment));
-           }).on('click.close', function (d3_event, d) {
-             this.blur(); // avoid keeping focus on the button - #4641
+           dispatch.call('change');
+         })["catch"](function () {
+           /* ignore */
+         });
 
-             var qaService = services.keepRight;
+         bing.copyrightNotices = function (zoom, extent) {
+           zoom = Math.min(zoom, 21);
+           return providers.filter(function (provider) {
+             return provider.areas.some(function (area) {
+               return extent.intersects(area.extent) && area.zoom[0] <= zoom && area.zoom[1] >= zoom;
+             });
+           }).map(function (provider) {
+             return provider.attribution;
+           }).join(', ');
+         };
 
-             if (qaService) {
-               d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
+         bing.getMetadata = function (center, tileCoord, callback) {
+           var tileID = tileCoord.slice(0, 3).join('/');
+           var zoom = Math.min(tileCoord[2], 21);
+           var centerPoint = center[1] + ',' + center[0]; // lat,lng
 
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
-           });
-           buttonSection.select('.ignore-button') // select and propagate data
-           .html(function (d) {
-             var andComment = d.newComment ? '_comment' : '';
-             return _t.html("QA.keepRight.ignore".concat(andComment));
-           }).on('click.ignore', function (d3_event, d) {
-             this.blur(); // avoid keeping focus on the button - #4641
+           var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
+           if (inflight[tileID]) return;
 
-             var qaService = services.keepRight;
+           if (!cache[tileID]) {
+             cache[tileID] = {};
+           }
 
-             if (qaService) {
-               d.newStatus = 'ignore'; // ignore permanently (false positive)
+           if (cache[tileID] && cache[tileID].metadata) {
+             return callback(null, cache[tileID].metadata);
+           }
 
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
-           });
-         } // NOTE: Don't change method name until UI v3 is merged
+           inflight[tileID] = true;
+           d3_json(url).then(function (result) {
+             delete inflight[tileID];
 
+             if (!result) {
+               throw new Error('Unknown Error');
+             }
 
-         keepRightEditor.error = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return keepRightEditor;
+             var vintage = {
+               start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
+               end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
+             };
+             vintage.range = vintageRange(vintage);
+             var metadata = {
+               vintage: vintage
+             };
+             cache[tileID].metadata = metadata;
+             if (callback) callback(null, metadata);
+           })["catch"](function (err) {
+             delete inflight[tileID];
+             if (callback) callback(err.message);
+           });
          };
 
-         return utilRebind(keepRightEditor, dispatch$1, 'on');
-       }
-
-       function uiOsmoseDetails(context) {
-         var _qaItem;
-
-         function issueString(d, type) {
-           if (!d) return ''; // Issue strings are cached from Osmose API
+         bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
+         return bing;
+       };
 
-           var s = services.osmose.getStrings(d.itemType);
-           return type in s ? s[type] : '';
+       rendererBackgroundSource.Esri = function (data) {
+         // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
+         if (data.template.match(/blankTile/) === null) {
+           data.template = data.template + '?blankTile=false';
          }
 
-         function osmoseDetails(selection) {
-           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           });
-           details.exit().remove();
-           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // Description
+         var esri = rendererBackgroundSource(data);
+         var cache = {};
+         var inflight = {};
 
-           if (issueString(_qaItem, 'detail')) {
-             var div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
-             div.append('h4').html(_t.html('QA.keepRight.detail_description'));
-             div.append('p').attr('class', 'qa-details-description-text').html(function (d) {
-               return issueString(d, 'detail');
-             }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
-           } // Elements (populated later as data is requested)
+         var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
+         // https://developers.arcgis.com/documentation/tiled-elevation-service/
 
 
-           var detailsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection');
-           var elemsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection'); // Suggested Fix (mustn't exist for every issue type)
+         esri.fetchTilemap = function (center) {
+           // skip if we have already fetched a tilemap within 5km
+           if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) return;
+           _prevCenter = center; // tiles are available globally to zoom level 19, afterward they may or may not be present
 
-           if (issueString(_qaItem, 'fix')) {
-             var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           var z = 20; // first generate a random url using the template
 
-             _div.append('h4').html(_t.html('QA.osmose.fix_title'));
+           var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
 
-             _div.append('p').html(function (d) {
-               return issueString(d, 'fix');
-             }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
-           } // Common Pitfalls (mustn't exist for every issue type)
+           var x = Math.floor((center[0] + 180) / 360 * Math.pow(2, z));
+           var y = Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)); // fetch an 8x8 grid to leverage cache
 
+           var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8'; // make the request and introspect the response from the tilemap server
 
-           if (issueString(_qaItem, 'trap')) {
-             var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           d3_json(tilemapUrl).then(function (tilemap) {
+             if (!tilemap) {
+               throw new Error('Unknown Error');
+             }
 
-             _div2.append('h4').html(_t.html('QA.osmose.trap_title'));
+             var hasTiles = true;
 
-             _div2.append('p').html(function (d) {
-               return issueString(d, 'trap');
-             }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
-           } // Save current item to check if UI changed by time request resolves
+             for (var i = 0; i < tilemap.data.length; i++) {
+               // 0 means an individual tile in the grid doesn't exist
+               if (!tilemap.data[i]) {
+                 hasTiles = false;
+                 break;
+               }
+             } // if any tiles are missing at level 20 we restrict maxZoom to 19
 
 
-           var thisItem = _qaItem;
-           services.osmose.loadIssueDetail(_qaItem).then(function (d) {
-             // No details to add if there are no associated issue elements
-             if (!d.elems || d.elems.length === 0) return; // Do nothing if UI has moved on by the time this resolves
+             esri.zoomExtent[1] = hasTiles ? 22 : 19;
+           })["catch"](function () {
+             /* ignore */
+           });
+         };
 
-             if (context.selectedErrorID() !== thisItem.id && context.container().selectAll(".qaItem.osmose.hover.itemId-".concat(thisItem.id)).empty()) return; // Things like keys and values are dynamically added to a subtitle string
+         esri.getMetadata = function (center, tileCoord, callback) {
+           if (esri.id !== 'EsriWorldImagery') {
+             // rest endpoint is not available for ESRI's "clarity" imagery
+             return callback(null, {});
+           }
 
-             if (d.detail) {
-               detailsDiv.append('h4').html(_t.html('QA.osmose.detail_title'));
-               detailsDiv.append('p').html(function (d) {
-                 return d.detail;
-               }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
-             } // Create list of linked issue elements
+           var tileID = tileCoord.slice(0, 3).join('/');
+           var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
+           var centerPoint = center[0] + ',' + center[1]; // long, lat (as it should be)
 
+           var unknown = _t('info_panels.background.unknown');
+           var vintage = {};
+           var metadata = {};
+           if (inflight[tileID]) return; // build up query using the layer appropriate to the current zoom
 
-             elemsDiv.append('h4').html(_t.html('QA.osmose.elems_title'));
-             elemsDiv.append('ul').selectAll('li').data(d.elems).enter().append('li').append('a').attr('href', '#').attr('class', 'error_entity_link').html(function (d) {
-               return d;
-             }).each(function () {
-               var link = select(this);
-               var entityID = this.textContent;
-               var entity = context.hasEntity(entityID); // Add click handler
+           var url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/4/query';
+           url += '?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
 
-               link.on('mouseenter', function () {
-                 utilHighlightEntities([entityID], true, context);
-               }).on('mouseleave', function () {
-                 utilHighlightEntities([entityID], false, context);
-               }).on('click', function (d3_event) {
-                 d3_event.preventDefault();
-                 utilHighlightEntities([entityID], false, context);
-                 var osmlayer = context.layers().layer('osm');
+           if (!cache[tileID]) {
+             cache[tileID] = {};
+           }
 
-                 if (!osmlayer.enabled()) {
-                   osmlayer.enabled(true);
-                 }
+           if (cache[tileID] && cache[tileID].metadata) {
+             return callback(null, cache[tileID].metadata);
+           }
 
-                 context.map().centerZoom(d.loc, 20);
+           inflight[tileID] = true;
+           d3_json(url).then(function (result) {
+             delete inflight[tileID];
+             result = result.features.map(function (f) {
+               return f.attributes;
+             }).filter(function (a) {
+               return a.MinMapLevel <= zoom && a.MaxMapLevel >= zoom;
+             })[0];
 
-                 if (entity) {
-                   context.enter(modeSelect(context, [entityID]));
-                 } else {
-                   context.loadEntity(entityID, function () {
-                     context.enter(modeSelect(context, [entityID]));
-                   });
-                 }
-               }); // Replace with friendly name if possible
-               // (The entity may not yet be loaded into the graph)
+             if (!result) {
+               throw new Error('Unknown Error');
+             } else if (result.features && result.features.length < 1) {
+               throw new Error('No Results');
+             } else if (result.error && result.error.message) {
+               throw new Error(result.error.message);
+             } // pass through the discrete capture date from metadata
 
-               if (entity) {
-                 var name = utilDisplayName(entity); // try to use common name
 
-                 if (!name) {
-                   var preset = _mainPresetIndex.match(entity, context.graph());
-                   name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
-                 }
+             var captureDate = localeDateString(result.SRC_DATE2);
+             vintage = {
+               start: captureDate,
+               end: captureDate,
+               range: captureDate
+             };
+             metadata = {
+               vintage: vintage,
+               source: clean(result.NICE_NAME),
+               description: clean(result.NICE_DESC),
+               resolution: clean(+parseFloat(result.SRC_RES).toFixed(4)),
+               accuracy: clean(+parseFloat(result.SRC_ACC).toFixed(4))
+             }; // append units - meters
 
-                 if (name) {
-                   this.innerText = name;
-                 }
-               }
-             }); // Don't hide entities related to this issue - #5880
+             if (isFinite(metadata.resolution)) {
+               metadata.resolution += ' m';
+             }
 
-             context.features().forceVisible(d.elems);
-             context.map().pan([0, 0]); // trigger a redraw
+             if (isFinite(metadata.accuracy)) {
+               metadata.accuracy += ' m';
+             }
+
+             cache[tileID].metadata = metadata;
+             if (callback) callback(null, metadata);
            })["catch"](function (err) {
-             console.log(err); // eslint-disable-line no-console
+             delete inflight[tileID];
+             if (callback) callback(err.message);
            });
-         }
 
-         osmoseDetails.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return osmoseDetails;
+           function clean(val) {
+             return String(val).trim() || unknown;
+           }
          };
 
-         return osmoseDetails;
-       }
-
-       function uiOsmoseHeader() {
-         var _qaItem;
+         return esri;
+       };
 
-         function issueTitle(d) {
-           var unknown = _t('inspector.unknown');
-           if (!d) return unknown; // Issue titles supplied by Osmose
+       rendererBackgroundSource.None = function () {
+         var source = rendererBackgroundSource({
+           id: 'none',
+           template: ''
+         });
 
-           var s = services.osmose.getStrings(d.itemType);
-           return 'title' in s ? s.title : unknown;
-         }
+         source.name = function () {
+           return _t('background.none');
+         };
 
-         function osmoseHeader(selection) {
-           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           });
-           header.exit().remove();
-           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
-           var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
-             return d.id < 0;
-           }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
-             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
-           });
-           svgEnter.append('polygon').attr('fill', function (d) {
-             return services.osmose.getColor(d.item);
-           }).attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-           svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
-             var picon = d.icon;
+         source.label = function () {
+           return _t.html('background.none');
+         };
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return "#".concat(picon).concat(isMaki ? '-11' : '');
-             }
-           });
-           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
-         }
+         source.imageryUsed = function () {
+           return null;
+         };
 
-         osmoseHeader.issue = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return osmoseHeader;
+         source.area = function () {
+           return -1; // sources in background pane are sorted by area
          };
 
-         return osmoseHeader;
-       }
+         return source;
+       };
 
-       function uiViewOnOsmose() {
-         var _qaItem;
+       rendererBackgroundSource.Custom = function (template) {
+         var source = rendererBackgroundSource({
+           id: 'custom',
+           template: template
+         });
 
-         function viewOnOsmose(selection) {
-           var url;
+         source.name = function () {
+           return _t('background.custom');
+         };
 
-           if (services.osmose && _qaItem instanceof QAItem) {
-             url = services.osmose.itemURL(_qaItem);
-           }
+         source.label = function () {
+           return _t.html('background.custom');
+         };
 
-           var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
+         source.imageryUsed = function () {
+           // sanitize personal connection tokens - #6801
+           var cleaned = source.template(); // from query string parameters
 
-           link.exit().remove(); // enter
+           if (cleaned.indexOf('?') !== -1) {
+             var parts = cleaned.split('?', 2);
+             var qs = utilStringQs(parts[1]);
+             ['access_token', 'connectId', 'token'].forEach(function (param) {
+               if (qs[param]) {
+                 qs[param] = '{apikey}';
+               }
+             });
+             cleaned = parts[0] + '?' + utilQsString(qs, true); // true = soft encode
+           } // from wms/wmts api path parameters
 
-           var linkEnter = link.enter().append('a').attr('class', 'view-on-osmose').attr('target', '_blank').attr('rel', 'noopener') // security measure
-           .attr('href', function (d) {
-             return d;
-           }).call(svgIcon('#iD-icon-out-link', 'inline'));
-           linkEnter.append('span').html(_t.html('inspector.view_on_osmose'));
-         }
 
-         viewOnOsmose.what = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return viewOnOsmose;
+           cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
+           return 'Custom (' + cleaned + ' )';
          };
 
-         return viewOnOsmose;
-       }
+         source.area = function () {
+           return -2; // sources in background pane are sorted by area
+         };
 
-       function uiOsmoseEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var qaDetails = uiOsmoseDetails(context);
-         var qaHeader = uiOsmoseHeader();
+         return source;
+       };
 
-         var _qaItem;
+       function rendererTileLayer(context) {
+         var transformProp = utilPrefixCSSProperty('Transform');
+         var tiler = utilTiler();
+         var _tileSize = 256;
 
-         function osmoseEditor(selection) {
-           var header = selection.selectAll('.header').data([0]);
-           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
-           headerEnter.append('button').attr('class', 'close').on('click', function () {
-             return context.enter(modeBrowse(context));
-           }).call(svgIcon('#iD-icon-close'));
-           headerEnter.append('h3').html(_t.html('QA.osmose.title'));
-           var body = selection.selectAll('.body').data([0]);
-           body = body.enter().append('div').attr('class', 'body').merge(body);
-           var editor = body.selectAll('.qa-editor').data([0]);
-           editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(osmoseSaveSection);
-           var footer = selection.selectAll('.footer').data([0]);
-           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOsmose().what(_qaItem));
-         }
+         var _projection;
 
-         function osmoseSaveSection(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+         var _cache = {};
 
-           var isShown = _qaItem && isSelected;
-           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
-             return "".concat(d.id, "-").concat(d.status || 0);
-           }); // exit
+         var _tileOrigin;
 
-           saveSection.exit().remove(); // enter
+         var _zoom;
 
-           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
+         var _source;
 
-           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
+         function tileSizeAtZoom(d, z) {
+           var EPSILON = 0.002; // close seams
+
+           return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
          }
 
-         function qaSaveButtons(selection) {
-           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
+         function atZoom(t, distance) {
+           var power = Math.pow(2, distance);
+           return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
+         }
 
-           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
-             return d.status + d.id;
-           }); // exit
+         function lookUp(d) {
+           for (var up = -1; up > -d[2]; up--) {
+             var tile = atZoom(d, up);
 
-           buttonSection.exit().remove(); // enter
+             if (_cache[_source.url(tile)] !== false) {
+               return tile;
+             }
+           }
+         }
 
-           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
-           buttonEnter.append('button').attr('class', 'button close-button action');
-           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
+         function uniqueBy(a, n) {
+           var o = [];
+           var seen = {};
 
-           buttonSection = buttonSection.merge(buttonEnter);
-           buttonSection.select('.close-button').html(_t.html('QA.keepRight.close')).on('click.close', function (d3_event, d) {
-             this.blur(); // avoid keeping focus on the button - #4641
+           for (var i = 0; i < a.length; i++) {
+             if (seen[a[i][n]] === undefined) {
+               o.push(a[i]);
+               seen[a[i][n]] = true;
+             }
+           }
 
-             var qaService = services.osmose;
+           return o;
+         }
 
-             if (qaService) {
-               d.newStatus = 'done';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
-           });
-           buttonSection.select('.ignore-button').html(_t.html('QA.keepRight.ignore')).on('click.ignore', function (d3_event, d) {
-             this.blur(); // avoid keeping focus on the button - #4641
+         function addSource(d) {
+           d.push(_source.url(d));
+           return d;
+         } // Update tiles based on current state of `projection`.
 
-             var qaService = services.osmose;
 
-             if (qaService) {
-               d.newStatus = 'false';
-               qaService.postUpdate(d, function (err, item) {
-                 return dispatch$1.call('change', item);
-               });
-             }
-           });
-         } // NOTE: Don't change method name until UI v3 is merged
+         function background(selection) {
+           _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
+           var pixelOffset;
+
+           if (_source) {
+             pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
+           } else {
+             pixelOffset = [0, 0];
+           }
 
+           var translate = [_projection.translate()[0] + pixelOffset[0], _projection.translate()[1] + pixelOffset[1]];
+           tiler.scale(_projection.scale() * 2 * Math.PI).translate(translate);
+           _tileOrigin = [_projection.scale() * Math.PI - translate[0], _projection.scale() * Math.PI - translate[1]];
+           render(selection);
+         } // Derive the tiles onscreen, remove those offscreen and position them.
+         // Important that this part not depend on `_projection` because it's
+         // rentered when tiles load/error (see #644).
 
-         osmoseEditor.error = function (val) {
-           if (!arguments.length) return _qaItem;
-           _qaItem = val;
-           return osmoseEditor;
-         };
 
-         return utilRebind(osmoseEditor, dispatch$1, 'on');
-       }
+         function render(selection) {
+           if (!_source) return;
+           var requests = [];
+           var showDebug = context.getDebug('tile') && !_source.overlay;
 
-       function modeSelectError(context, selectedErrorID, selectedErrorService) {
-         var mode = {
-           id: 'select-error',
-           button: 'browse'
-         };
-         var keybinding = utilKeybinding('select-error');
-         var errorService = services[selectedErrorService];
-         var errorEditor;
+           if (_source.validZoom(_zoom)) {
+             tiler.skipNullIsland(!!_source.overlay);
+             tiler().forEach(function (d) {
+               addSource(d);
+               if (d[3] === '') return;
+               if (typeof d[3] !== 'string') return; // Workaround for #2295
 
-         switch (selectedErrorService) {
-           case 'improveOSM':
-             errorEditor = uiImproveOsmEditor(context).on('change', function () {
-               context.map().pan([0, 0]); // trigger a redraw
+               requests.push(d);
 
-               var error = checkSelectedID();
-               if (!error) return;
-               context.ui().sidebar.show(errorEditor.error(error));
+               if (_cache[d[3]] === false && lookUp(d)) {
+                 requests.push(addSource(lookUp(d)));
+               }
              });
-             break;
-
-           case 'keepRight':
-             errorEditor = uiKeepRightEditor(context).on('change', function () {
-               context.map().pan([0, 0]); // trigger a redraw
-
-               var error = checkSelectedID();
-               if (!error) return;
-               context.ui().sidebar.show(errorEditor.error(error));
+             requests = uniqueBy(requests, 3).filter(function (r) {
+               // don't re-request tiles which have failed in the past
+               return _cache[r[3]] !== false;
              });
-             break;
-
-           case 'osmose':
-             errorEditor = uiOsmoseEditor(context).on('change', function () {
-               context.map().pan([0, 0]); // trigger a redraw
+           }
 
-               var error = checkSelectedID();
-               if (!error) return;
-               context.ui().sidebar.show(errorEditor.error(error));
-             });
-             break;
-         }
+           function load(d3_event, d) {
+             _cache[d[3]] = true;
+             select(this).on('error', null).on('load', null).classed('tile-loaded', true);
+             render(selection);
+           }
 
-         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+           function error(d3_event, d) {
+             _cache[d[3]] = false;
+             select(this).on('error', null).on('load', null).remove();
+             render(selection);
+           }
 
-         function checkSelectedID() {
-           if (!errorService) return;
-           var error = errorService.getError(selectedErrorID);
+           function imageTransform(d) {
+             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-           if (!error) {
-             context.enter(modeBrowse(context));
+             var scale = tileSizeAtZoom(d, _zoom);
+             return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
            }
 
-           return error;
-         }
-
-         mode.zoomToSelected = function () {
-           if (!errorService) return;
-           var error = errorService.getError(selectedErrorID);
+           function tileCenter(d) {
+             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
 
-           if (error) {
-             context.map().centerZoomEase(error.loc, 20);
+             return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
            }
-         };
 
-         mode.enter = function () {
-           var error = checkSelectedID();
-           if (!error) return;
-           behaviors.forEach(context.install);
-           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
-           select(document).call(keybinding);
-           selectError();
-           var sidebar = context.ui().sidebar;
-           sidebar.show(errorEditor.error(error));
-           context.map().on('drawn.select-error', selectError); // class the error as selected, or return to browse mode if the error is gone
+           function debugTransform(d) {
+             var coord = tileCenter(d);
+             return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
+           } // Pick a representative tile near the center of the viewport
+           // (This is useful for sampling the imagery vintage)
 
-           function selectError(d3_event, drawn) {
-             if (!checkSelectedID()) return;
-             var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-             if (selection.empty()) {
-               // Return to browse mode if selected DOM elements have
-               // disappeared because the user moved them out of view..
-               var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
+           var dims = tiler.size();
+           var mapCenter = [dims[0] / 2, dims[1] / 2];
+           var minDist = Math.max(dims[0], dims[1]);
+           var nearCenter;
+           requests.forEach(function (d) {
+             var c = tileCenter(d);
+             var dist = geoVecLength(c, mapCenter);
 
-               if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
-                 context.enter(modeBrowse(context));
-               }
-             } else {
-               selection.classed('selected', true);
-               context.selectedErrorID(selectedErrorID);
+             if (dist < minDist) {
+               minDist = dist;
+               nearCenter = d;
              }
-           }
+           });
+           var image = selection.selectAll('img').data(requests, function (d) {
+             return d[3];
+           });
+           image.exit().style(transformProp, imageTransform).classed('tile-removing', true).classed('tile-center', false).each(function () {
+             var tile = select(this);
+             window.setTimeout(function () {
+               if (tile.classed('tile-removing')) {
+                 tile.remove();
+               }
+             }, 300);
+           });
+           image.enter().append('img').attr('class', 'tile').attr('alt', '').attr('draggable', 'false').style('width', _tileSize + 'px').style('height', _tileSize + 'px').attr('src', function (d) {
+             return d[3];
+           }).on('error', error).on('load', load).merge(image).style(transformProp, imageTransform).classed('tile-debug', showDebug).classed('tile-removing', false).classed('tile-center', function (d) {
+             return d === nearCenter;
+           });
+           var debug = selection.selectAll('.tile-label-debug').data(showDebug ? requests : [], function (d) {
+             return d[3];
+           });
+           debug.exit().remove();
 
-           function esc() {
-             if (context.container().select('.combobox').size()) return;
-             context.enter(modeBrowse(context));
+           if (showDebug) {
+             var debugEnter = debug.enter().append('div').attr('class', 'tile-label-debug');
+             debugEnter.append('div').attr('class', 'tile-label-debug-coord');
+             debugEnter.append('div').attr('class', 'tile-label-debug-vintage');
+             debug = debug.merge(debugEnter);
+             debug.style(transformProp, debugTransform);
+             debug.selectAll('.tile-label-debug-coord').text(function (d) {
+               return d[2] + ' / ' + d[0] + ' / ' + d[1];
+             });
+             debug.selectAll('.tile-label-debug-vintage').each(function (d) {
+               var span = select(this);
+               var center = context.projection.invert(tileCenter(d));
+
+               _source.getMetadata(center, d, function (err, result) {
+                 if (result && result.vintage && result.vintage.range) {
+                   span.text(result.vintage.range);
+                 } else {
+                   span.html(_t.html('info_panels.background.vintage') + ': ' + _t.html('info_panels.background.unknown'));
+                 }
+               });
+             });
            }
+         }
+
+         background.projection = function (val) {
+           if (!arguments.length) return _projection;
+           _projection = val;
+           return background;
          };
 
-         mode.exit = function () {
-           behaviors.forEach(context.uninstall);
-           select(document).call(keybinding.unbind);
-           context.surface().selectAll('.qaItem.selected').classed('selected hover', false);
-           context.map().on('drawn.select-error', null);
-           context.ui().sidebar.hide();
-           context.selectedErrorID(null);
-           context.features().forceVisible([]);
+         background.dimensions = function (val) {
+           if (!arguments.length) return tiler.size();
+           tiler.size(val);
+           return background;
          };
 
-         return mode;
+         background.source = function (val) {
+           if (!arguments.length) return _source;
+           _source = val;
+           _tileSize = _source.tileSize;
+           _cache = {};
+           tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
+           return background;
+         };
+
+         return background;
        }
 
-       function behaviorSelect(context) {
-         var _tolerancePx = 4; // see also behaviorDrag
+       var _imageryIndex = null;
+       function rendererBackground(context) {
+         var dispatch = dispatch$8('change');
+         var detected = utilDetect();
+         var baseLayer = rendererTileLayer(context).projection(context.projection);
+         var _checkedBlocklists = [];
+         var _isValid = true;
+         var _overlayLayers = [];
+         var _brightness = 1;
+         var _contrast = 1;
+         var _saturation = 1;
+         var _sharpness = 1;
 
-         var _lastMouseEvent = null;
-         var _showMenu = false;
-         var _downPointers = {};
-         var _longPressTimeout = null;
-         var _lastInteractionType = null; // the id of the down pointer that's enabling multiselection while down
+         function ensureImageryIndex() {
+           return _mainFileFetcher.get('imagery').then(function (sources) {
+             if (_imageryIndex) return _imageryIndex;
+             _imageryIndex = {
+               imagery: sources,
+               features: {}
+             }; // use which-polygon to support efficient index and querying for imagery
 
-         var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events
+             var features = sources.map(function (source) {
+               if (!source.polygon) return null; // workaround for editor-layer-index weirdness..
+               // Add an extra array nest to each element in `source.polygon`
+               // so the rings are not treated as a bunch of holes:
+               // what we have: [ [[outer],[hole],[hole]] ]
+               // what we want: [ [[outer]],[[outer]],[[outer]] ]
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+               var rings = source.polygon.map(function (ring) {
+                 return [ring];
+               });
+               var feature = {
+                 type: 'Feature',
+                 properties: {
+                   id: source.id
+                 },
+                 geometry: {
+                   type: 'MultiPolygon',
+                   coordinates: rings
+                 }
+               };
+               _imageryIndex.features[source.id] = feature;
+               return feature;
+             }).filter(Boolean);
+             _imageryIndex.query = whichPolygon_1({
+               type: 'FeatureCollection',
+               features: features
+             }); // Instantiate `rendererBackgroundSource` objects for each source
 
-         function keydown(d3_event) {
-           if (d3_event.keyCode === 32) {
-             // don't react to spacebar events during text input
-             var activeNode = document.activeElement;
-             if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) return;
-           }
+             _imageryIndex.backgrounds = sources.map(function (source) {
+               if (source.type === 'bing') {
+                 return rendererBackgroundSource.Bing(source, dispatch);
+               } else if (/^EsriWorldImagery/.test(source.id)) {
+                 return rendererBackgroundSource.Esri(source);
+               } else {
+                 return rendererBackgroundSource(source);
+               }
+             }); // Add 'None'
 
-           if (d3_event.keyCode === 93 || // context menu key
-           d3_event.keyCode === 32) {
-             // spacebar
-             d3_event.preventDefault();
-           }
+             _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
 
-           if (d3_event.repeat) return; // ignore repeated events for held keys
-           // if any key is pressed the user is probably doing something other than long-pressing
 
-           cancelLongPress();
+             var template = corePreferences('background-custom-template') || '';
+             var custom = rendererBackgroundSource.Custom(template);
 
-           if (d3_event.shiftKey) {
-             context.surface().classed('behavior-multiselect', true);
-           }
+             _imageryIndex.backgrounds.unshift(custom);
 
-           if (d3_event.keyCode === 32) {
-             // spacebar
-             if (!_downPointers.spacebar && _lastMouseEvent) {
-               cancelLongPress();
-               _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
-               _downPointers.spacebar = {
-                 firstEvent: _lastMouseEvent,
-                 lastEvent: _lastMouseEvent
-               };
-             }
-           }
+             return _imageryIndex;
+           });
          }
 
-         function keyup(d3_event) {
-           cancelLongPress();
-
-           if (!d3_event.shiftKey) {
-             context.surface().classed('behavior-multiselect', false);
-           }
-
-           if (d3_event.keyCode === 93) {
-             // context menu key
-             d3_event.preventDefault();
-             _lastInteractionType = 'menukey';
-             contextmenu(d3_event);
-           } else if (d3_event.keyCode === 32) {
-             // spacebar
-             var pointer = _downPointers.spacebar;
+         function background(selection) {
+           var currSource = baseLayer.source(); // If we are displaying an Esri basemap at high zoom,
+           // check its tilemap to see how high the zoom can go
 
-             if (pointer) {
-               delete _downPointers.spacebar;
-               if (pointer.done) return;
-               d3_event.preventDefault();
-               _lastInteractionType = 'spacebar';
-               click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
+           if (context.map().zoom() > 18) {
+             if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
+               var center = context.map().center();
+               currSource.fetchTilemap(center);
              }
-           }
-         }
-
-         function pointerdown(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
-           cancelLongPress();
-           if (d3_event.buttons && d3_event.buttons !== 1) return;
-           context.ui().closeEditMenu();
-           _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (d3_event.pointerType || 'mouse'));
-           _downPointers[id] = {
-             firstEvent: d3_event,
-             lastEvent: d3_event
-           };
-         }
-
-         function didLongPress(id, interactionType) {
-           var pointer = _downPointers[id];
-           if (!pointer) return;
-
-           for (var i in _downPointers) {
-             // don't allow this or any currently down pointer to trigger another click
-             _downPointers[i].done = true;
-           } // treat long presses like right-clicks
-
+           } // Is the imagery valid here? - #4827
 
-           _longPressTimeout = null;
-           _lastInteractionType = interactionType;
-           _showMenu = true;
-           click(pointer.firstEvent, pointer.lastEvent, id);
-         }
 
-         function pointermove(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
+           var sources = background.sources(context.map().extent());
+           var wasValid = _isValid;
+           _isValid = !!sources.filter(function (d) {
+             return d === currSource;
+           }).length;
 
-           if (_downPointers[id]) {
-             _downPointers[id].lastEvent = d3_event;
+           if (wasValid !== _isValid) {
+             // change in valid status
+             background.updateImagery();
            }
 
-           if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
-             _lastMouseEvent = d3_event;
+           var baseFilter = '';
 
-             if (_downPointers.spacebar) {
-               _downPointers.spacebar.lastEvent = d3_event;
+           if (detected.cssfilters) {
+             if (_brightness !== 1) {
+               baseFilter += " brightness(".concat(_brightness, ")");
              }
-           }
-         }
 
-         function pointerup(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
-           var pointer = _downPointers[id];
-           if (!pointer) return;
-           delete _downPointers[id];
+             if (_contrast !== 1) {
+               baseFilter += " contrast(".concat(_contrast, ")");
+             }
 
-           if (_multiselectionPointerId === id) {
-             _multiselectionPointerId = null;
-           }
+             if (_saturation !== 1) {
+               baseFilter += " saturate(".concat(_saturation, ")");
+             }
 
-           if (pointer.done) return;
-           click(pointer.firstEvent, d3_event, id);
-         }
+             if (_sharpness < 1) {
+               // gaussian blur
+               var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
+               baseFilter += " blur(".concat(blur, "px)");
+             }
+           }
 
-         function pointercancel(d3_event) {
-           var id = (d3_event.pointerId || 'mouse').toString();
-           if (!_downPointers[id]) return;
-           delete _downPointers[id];
+           var base = selection.selectAll('.layer-background').data([0]);
+           base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
 
-           if (_multiselectionPointerId === id) {
-             _multiselectionPointerId = null;
+           if (detected.cssfilters) {
+             base.style('filter', baseFilter || null);
+           } else {
+             base.style('opacity', _brightness);
            }
-         }
 
-         function contextmenu(d3_event) {
-           d3_event.preventDefault();
+           var imagery = base.selectAll('.layer-imagery').data([0]);
+           imagery.enter().append('div').attr('class', 'layer layer-imagery').merge(imagery).call(baseLayer);
+           var maskFilter = '';
+           var mixBlendMode = '';
 
-           if (!+d3_event.clientX && !+d3_event.clientY) {
-             if (_lastMouseEvent) {
-               d3_event.sourceEvent = _lastMouseEvent;
-             } else {
-               return;
-             }
-           } else {
-             _lastMouseEvent = d3_event;
-             _lastInteractionType = 'rightclick';
+           if (detected.cssfilters && _sharpness > 1) {
+             // apply unsharp mask
+             mixBlendMode = 'overlay';
+             maskFilter = 'saturate(0) blur(3px) invert(1)';
+             var contrast = _sharpness - 1;
+             maskFilter += " contrast(".concat(contrast, ")");
+             var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
+             maskFilter += " brightness(".concat(brightness, ")");
            }
 
-           _showMenu = true;
-           click(d3_event, d3_event);
+           var mask = base.selectAll('.layer-unsharp-mask').data(detected.cssfilters && _sharpness > 1 ? [0] : []);
+           mask.exit().remove();
+           mask.enter().append('div').attr('class', 'layer layer-mask layer-unsharp-mask').merge(mask).call(baseLayer).style('filter', maskFilter || null).style('mix-blend-mode', mixBlendMode || null);
+           var overlays = selection.selectAll('.layer-overlay').data(_overlayLayers, function (d) {
+             return d.source().name();
+           });
+           overlays.exit().remove();
+           overlays.enter().insert('div', '.layer-data').attr('class', 'layer layer-overlay').merge(overlays).each(function (layer, i, nodes) {
+             return select(nodes[i]).call(layer);
+           });
          }
 
-         function click(firstEvent, lastEvent, pointerId) {
-           cancelLongPress();
-           var mapNode = context.container().select('.main-map').node(); // Use the `main-map` coordinate system since the surface and supersurface
-           // are transformed when drag-panning.
-
-           var pointGetter = utilFastMouse(mapNode);
-           var p1 = pointGetter(firstEvent);
-           var p2 = pointGetter(lastEvent);
-           var dist = geoVecLength(p1, p2);
+         background.updateImagery = function () {
+           var currSource = baseLayer.source();
+           if (context.inIntro() || !currSource) return;
 
-           if (dist > _tolerancePx || !mapContains(lastEvent)) {
-             resetProperties();
-             return;
-           }
+           var o = _overlayLayers.filter(function (d) {
+             return !d.source().isLocatorOverlay() && !d.source().isHidden();
+           }).map(function (d) {
+             return d.source().id;
+           }).join(',');
 
-           var targetDatum = lastEvent.target.__data__;
-           var multiselectEntityId;
+           var meters = geoOffsetToMeters(currSource.offset());
+           var EPSILON = 0.01;
+           var x = +meters[0].toFixed(2);
+           var y = +meters[1].toFixed(2);
+           var hash = utilStringQs(window.location.hash);
+           var id = currSource.id;
 
-           if (!_multiselectionPointerId) {
-             // If a different pointer than the one triggering this click is down on a
-             // feature, treat this and all future clicks as multiselection until that
-             // pointer is raised.
-             var selectPointerInfo = pointerDownOnSelection(pointerId);
+           if (id === 'custom') {
+             id = "custom:".concat(currSource.template());
+           }
 
-             if (selectPointerInfo) {
-               _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
+           if (id) {
+             hash.background = id;
+           } else {
+             delete hash.background;
+           }
 
-               multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
-               _downPointers[selectPointerInfo.pointerId].done = true;
-             }
-           } // support multiselect if data is already selected
+           if (o) {
+             hash.overlays = o;
+           } else {
+             delete hash.overlays;
+           }
 
+           if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
+             hash.offset = "".concat(x, ",").concat(y);
+           } else {
+             delete hash.offset;
+           }
 
-           var isMultiselect = context.mode().id === 'select' && ( // and shift key is down
-           lastEvent && lastEvent.shiftKey || // or we're lasso-selecting
-           context.surface().select('.lasso').node() || // or a pointer is down over a selected feature
-           _multiselectionPointerId && !multiselectEntityId);
+           if (!window.mocha) {
+             window.location.replace('#' + utilQsString(hash, true));
+           }
 
-           processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
+           var imageryUsed = [];
+           var photoOverlaysUsed = [];
+           var currUsed = currSource.imageryUsed();
 
-           function mapContains(event) {
-             var rect = mapNode.getBoundingClientRect();
-             return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
+           if (currUsed && _isValid) {
+             imageryUsed.push(currUsed);
            }
 
-           function pointerDownOnSelection(skipPointerId) {
-             var mode = context.mode();
-             var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
+           _overlayLayers.filter(function (d) {
+             return !d.source().isLocatorOverlay() && !d.source().isHidden();
+           }).forEach(function (d) {
+             return imageryUsed.push(d.source().imageryUsed());
+           });
 
-             for (var pointerId in _downPointers) {
-               if (pointerId === 'spacebar' || pointerId === skipPointerId) continue;
-               var pointerInfo = _downPointers[pointerId];
-               var p1 = pointGetter(pointerInfo.firstEvent);
-               var p2 = pointGetter(pointerInfo.lastEvent);
-               if (geoVecLength(p1, p2) > _tolerancePx) continue;
-               var datum = pointerInfo.firstEvent.target.__data__;
-               var entity = datum && datum.properties && datum.properties.entity || datum;
-               if (context.graph().hasEntity(entity.id)) return {
-                 pointerId: pointerId,
-                 entityId: entity.id,
-                 selected: selectedIDs.indexOf(entity.id) !== -1
-               };
-             }
+           var dataLayer = context.layers().layer('data');
 
-             return null;
+           if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
+             imageryUsed.push(dataLayer.getSrc());
            }
-         }
 
-         function processClick(datum, isMultiselect, point, alsoSelectId) {
-           var mode = context.mode();
-           var showMenu = _showMenu;
-           var interactionType = _lastInteractionType;
-           var entity = datum && datum.properties && datum.properties.entity;
-           if (entity) datum = entity;
+           var photoOverlayLayers = {
+             streetside: 'Bing Streetside',
+             mapillary: 'Mapillary Images',
+             'mapillary-map-features': 'Mapillary Map Features',
+             'mapillary-signs': 'Mapillary Signs',
+             kartaview: 'KartaView Images'
+           };
 
-           if (datum && datum.type === 'midpoint') {
-             // treat targeting midpoints as if targeting the parent way
-             datum = datum.parents[0];
+           for (var layerID in photoOverlayLayers) {
+             var layer = context.layers().layer(layerID);
+
+             if (layer && layer.enabled()) {
+               photoOverlaysUsed.push(layerID);
+               imageryUsed.push(photoOverlayLayers[layerID]);
+             }
            }
 
-           var newMode;
+           context.history().imageryUsed(imageryUsed);
+           context.history().photoOverlaysUsed(photoOverlaysUsed);
+         };
 
-           if (datum instanceof osmEntity) {
-             // targeting an entity
-             var selectedIDs = context.selectedIDs();
-             context.selectedNoteID(null);
-             context.selectedErrorID(null);
+         background.sources = function (extent, zoom, includeCurrent) {
+           if (!_imageryIndex) return []; // called before init()?
 
-             if (!isMultiselect) {
-               // don't change the selection if we're toggling the menu atop a multiselection
-               if (!showMenu || selectedIDs.length <= 1 || selectedIDs.indexOf(datum.id) === -1) {
-                 if (alsoSelectId === datum.id) alsoSelectId = null;
-                 selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]); // always enter modeSelect even if the entity is already
-                 // selected since listeners may expect `context.enter` events,
-                 // e.g. in the walkthrough
+           var visible = {};
+           (_imageryIndex.query.bbox(extent.rectangle(), true) || []).forEach(function (d) {
+             return visible[d.id] = true;
+           });
+           var currSource = baseLayer.source(); // Recheck blocked sources only if we detect new blocklists pulled from the OSM API.
 
-                 newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
-                 context.enter(newMode);
-               }
-             } else {
-               if (selectedIDs.indexOf(datum.id) !== -1) {
-                 // clicked entity is already in the selectedIDs list..
-                 if (!showMenu) {
-                   // deselect clicked entity, then reenter select mode or return to browse mode..
-                   selectedIDs = selectedIDs.filter(function (id) {
-                     return id !== datum.id;
-                   });
-                   newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
-                   context.enter(newMode);
-                 }
-               } else {
-                 // clicked entity is not in the selected list, add it..
-                 selectedIDs = selectedIDs.concat([datum.id]);
-                 newMode = mode.selectedIDs(selectedIDs);
-                 context.enter(newMode);
-               }
-             }
-           } else if (datum && datum.__featurehash__ && !isMultiselect) {
-             // targeting custom data
-             context.selectedNoteID(null).enter(modeSelectData(context, datum));
-           } else if (datum instanceof osmNote && !isMultiselect) {
-             // targeting a note
-             context.selectedNoteID(datum.id).enter(modeSelectNote(context, datum.id));
-           } else if (datum instanceof QAItem & !isMultiselect) {
-             // targeting an external QA issue
-             context.selectedErrorID(datum.id).enter(modeSelectError(context, datum.id, datum.service));
-           } else {
-             // targeting nothing
-             context.selectedNoteID(null);
-             context.selectedErrorID(null);
+           var osm = context.connection();
+           var blocklists = osm && osm.imageryBlocklists() || [];
+           var blocklistChanged = blocklists.length !== _checkedBlocklists.length || blocklists.some(function (regex, index) {
+             return String(regex) !== _checkedBlocklists[index];
+           });
 
-             if (!isMultiselect && mode.id !== 'browse') {
-               context.enter(modeBrowse(context));
-             }
-           }
+           if (blocklistChanged) {
+             _imageryIndex.backgrounds.forEach(function (source) {
+               source.isBlocked = blocklists.some(function (regex) {
+                 return regex.test(source.template());
+               });
+             });
 
-           context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
+             _checkedBlocklists = blocklists.map(function (regex) {
+               return String(regex);
+             });
+           }
 
-           if (showMenu) context.ui().showEditMenu(point, interactionType);
-           resetProperties();
-         }
+           return _imageryIndex.backgrounds.filter(function (source) {
+             if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
 
-         function cancelLongPress() {
-           if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
-           _longPressTimeout = null;
-         }
+             if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
 
-         function resetProperties() {
-           cancelLongPress();
-           _showMenu = false;
-           _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
-         }
+             if (!source.polygon) return true; // always include imagery with worldwide coverage
 
-         function behavior(selection) {
-           resetProperties();
-           _lastMouseEvent = context.map().lastPointerEvent();
-           select(window).on('keydown.select', keydown).on('keyup.select', keyup).on(_pointerPrefix + 'move.select', pointermove, true).on(_pointerPrefix + 'up.select', pointerup, true).on('pointercancel.select', pointercancel, true).on('contextmenu.select-window', function (d3_event) {
-             // Edge and IE really like to show the contextmenu on the
-             // menubar when user presses a keyboard menu button
-             // even after we've already preventdefaulted the key event.
-             var e = d3_event;
+             if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
 
-             if (+e.clientX === 0 && +e.clientY === 0) {
-               d3_event.preventDefault();
-             }
+             return visible[source.id]; // include imagery visible in given extent
            });
-           selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
-           /*if (d3_event && d3_event.shiftKey) {
-               context.surface()
-                   .classed('behavior-multiselect', true);
-           }*/
-         }
+         };
 
-         behavior.off = function (selection) {
-           cancelLongPress();
-           select(window).on('keydown.select', null).on('keyup.select', null).on('contextmenu.select-window', null).on(_pointerPrefix + 'move.select', null, true).on(_pointerPrefix + 'up.select', null, true).on('pointercancel.select', null, true);
-           selection.on(_pointerPrefix + 'down.select', null).on('contextmenu.select', null);
-           context.surface().classed('behavior-multiselect', false);
+         background.dimensions = function (val) {
+           if (!val) return;
+           baseLayer.dimensions(val);
+
+           _overlayLayers.forEach(function (layer) {
+             return layer.dimensions(val);
+           });
          };
 
-         return behavior;
-       }
+         background.baseLayerSource = function (d) {
+           if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
 
-       function behaviorDrawWay(context, wayID, mode, startGraph) {
-         var dispatch$1 = dispatch('rejectedSelfIntersection');
-         var behavior = behaviorDraw(context); // Must be set by `drawWay.nodeIndex` before each install of this behavior.
+           var osm = context.connection();
+           if (!osm) return background;
+           var blocklists = osm.imageryBlocklists();
+           var template = d.template();
+           var fail = false;
+           var tested = 0;
+           var regex;
 
-         var _nodeIndex;
+           for (var i = 0; i < blocklists.length; i++) {
+             regex = blocklists[i];
+             fail = regex.test(template);
+             tested++;
+             if (fail) break;
+           } // ensure at least one test was run.
 
-         var _origWay;
 
-         var _wayGeometry;
+           if (!tested) {
+             regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+             fail = regex.test(template);
+           }
 
-         var _headNodeID;
+           baseLayer.source(!fail ? d : background.findSource('none'));
+           dispatch.call('change');
+           background.updateImagery();
+           return background;
+         };
 
-         var _annotation;
+         background.findSource = function (id) {
+           if (!id || !_imageryIndex) return null; // called before init()?
 
-         var _pointerHasMoved = false; // The osmNode to be placed.
-         // This is temporary and just follows the mouse cursor until an "add" event occurs.
+           return _imageryIndex.backgrounds.find(function (d) {
+             return d.id && d.id === id;
+           });
+         };
 
-         var _drawNode;
+         background.bing = function () {
+           background.baseLayerSource(background.findSource('Bing'));
+         };
 
-         var _didResolveTempEdit = false;
+         background.showsLayer = function (d) {
+           var currSource = baseLayer.source();
+           if (!d || !currSource) return false;
+           return d.id === currSource.id || _overlayLayers.some(function (layer) {
+             return d.id === layer.source().id;
+           });
+         };
 
-         function createDrawNode(loc) {
-           // don't make the draw node until we actually need it
-           _drawNode = osmNode({
-             loc: loc
+         background.overlayLayerSources = function () {
+           return _overlayLayers.map(function (layer) {
+             return layer.source();
            });
-           context.pauseChangeDispatch();
-           context.replace(function actionAddDrawNode(graph) {
-             // add the draw node to the graph and insert it into the way
-             var way = graph.entity(wayID);
-             return graph.replace(_drawNode).replace(way.addNode(_drawNode.id, _nodeIndex));
-           }, _annotation);
-           context.resumeChangeDispatch();
-           setActiveElements();
-         }
+         };
 
-         function removeDrawNode() {
-           context.pauseChangeDispatch();
-           context.replace(function actionDeleteDrawNode(graph) {
-             var way = graph.entity(wayID);
-             return graph.replace(way.removeNode(_drawNode.id)).remove(_drawNode);
-           }, _annotation);
-           _drawNode = undefined;
-           context.resumeChangeDispatch();
-         }
+         background.toggleOverlayLayer = function (d) {
+           var layer;
 
-         function keydown(d3_event) {
-           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             if (context.surface().classed('nope')) {
-               context.surface().classed('nope-suppressed', true);
+           for (var i = 0; i < _overlayLayers.length; i++) {
+             layer = _overlayLayers[i];
+
+             if (layer.source() === d) {
+               _overlayLayers.splice(i, 1);
+
+               dispatch.call('change');
+               background.updateImagery();
+               return;
              }
+           }
 
-             context.surface().classed('nope', false).classed('nope-disabled', true);
+           layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
+
+           _overlayLayers.push(layer);
+
+           dispatch.call('change');
+           background.updateImagery();
+         };
+
+         background.nudge = function (d, zoom) {
+           var currSource = baseLayer.source();
+
+           if (currSource) {
+             currSource.nudge(d, zoom);
+             dispatch.call('change');
+             background.updateImagery();
            }
-         }
 
-         function keyup(d3_event) {
-           if (d3_event.keyCode === utilKeybinding.modifierCodes.alt) {
-             if (context.surface().classed('nope-suppressed')) {
-               context.surface().classed('nope', true);
-             }
+           return background;
+         };
 
-             context.surface().classed('nope-suppressed', false).classed('nope-disabled', false);
+         background.offset = function (d) {
+           var currSource = baseLayer.source();
+
+           if (!arguments.length) {
+             return currSource && currSource.offset() || [0, 0];
            }
-         }
 
-         function allowsVertex(d) {
-           return d.geometry(context.graph()) === 'vertex' || _mainPresetIndex.allowsVertex(d, context.graph());
-         } // related code
-         // - `mode/drag_node.js`     `doMove()`
-         // - `behavior/draw.js`      `click()`
-         // - `behavior/draw_way.js`  `move()`
+           if (currSource) {
+             currSource.offset(d);
+             dispatch.call('change');
+             background.updateImagery();
+           }
 
+           return background;
+         };
 
-         function move(d3_event, datum) {
-           var loc = context.map().mouseCoordinates();
-           if (!_drawNode) createDrawNode(loc);
-           context.surface().classed('nope-disabled', d3_event.altKey);
-           var targetLoc = datum && datum.properties && datum.properties.entity && allowsVertex(datum.properties.entity) && datum.properties.entity.loc;
-           var targetNodes = datum && datum.properties && datum.properties.nodes;
+         background.brightness = function (d) {
+           if (!arguments.length) return _brightness;
+           _brightness = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
-           if (targetLoc) {
-             // snap to node/vertex - a point target with `.loc`
-             loc = targetLoc;
-           } else if (targetNodes) {
-             // snap to way - a line target with `.nodes`
-             var choice = geoChooseEdge(targetNodes, context.map().mouse(), context.projection, _drawNode.id);
+         background.contrast = function (d) {
+           if (!arguments.length) return _contrast;
+           _contrast = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
-             if (choice) {
-               loc = choice.loc;
-             }
-           }
+         background.saturation = function (d) {
+           if (!arguments.length) return _saturation;
+           _saturation = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
-           context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-           _drawNode = context.entity(_drawNode.id);
-           checkGeometry(true
-           /* includeDrawNode */
-           );
-         } // Check whether this edit causes the geometry to break.
-         // If so, class the surface with a nope cursor.
-         // `includeDrawNode` - Only check the relevant line segments if finishing drawing
+         background.sharpness = function (d) {
+           if (!arguments.length) return _sharpness;
+           _sharpness = d;
+           if (context.mode()) dispatch.call('change');
+           return background;
+         };
 
+         var _loadPromise;
 
-         function checkGeometry(includeDrawNode) {
-           var nopeDisabled = context.surface().classed('nope-disabled');
-           var isInvalid = isInvalidGeometry(includeDrawNode);
+         background.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
 
-           if (nopeDisabled) {
-             context.surface().classed('nope', false).classed('nope-suppressed', isInvalid);
-           } else {
-             context.surface().classed('nope', isInvalid).classed('nope-suppressed', false);
+           function parseMapParams(qmap) {
+             if (!qmap) return false;
+             var params = qmap.split('/').map(Number);
+             if (params.length < 3 || params.some(isNaN)) return false;
+             return geoExtent([params[2], params[1]]); // lon,lat
            }
-         }
 
-         function isInvalidGeometry(includeDrawNode) {
-           var testNode = _drawNode; // we only need to test the single way we're drawing
+           var hash = utilStringQs(window.location.hash);
+           var requested = hash.background || hash.layer;
+           var extent = parseMapParams(hash.map);
+           return _loadPromise = ensureImageryIndex().then(function (imageryIndex) {
+             var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
+             var best;
 
-           var parentWay = context.graph().entity(wayID);
-           var nodes = context.graph().childNodes(parentWay).slice(); // shallow copy
+             if (!requested && extent) {
+               best = background.sources(extent).find(function (s) {
+                 return s.best();
+               });
+             } // Decide which background layer to display
 
-           if (includeDrawNode) {
-             if (parentWay.isClosed()) {
-               // don't test the last segment for closed ways - #4655
-               // (still test the first segment)
-               nodes.pop();
-             }
-           } else {
-             // discount the draw node
-             if (parentWay.isClosed()) {
-               if (nodes.length < 3) return false;
-               if (_drawNode) nodes.splice(-2, 1);
-               testNode = nodes[nodes.length - 2];
+
+             if (requested && requested.indexOf('custom:') === 0) {
+               var template = requested.replace(/^custom:/, '');
+               var custom = background.findSource('custom');
+               background.baseLayerSource(custom.template(template));
+               corePreferences('background-custom-template', template);
              } else {
-               // there's nothing we need to test if we ignore the draw node on open ways
-               return false;
+               background.baseLayerSource(background.findSource(requested) || best || background.findSource(corePreferences('background-last-used')) || background.findSource('Bing') || first || background.findSource('none'));
              }
-           }
 
-           return testNode && geoHasSelfIntersections(nodes, testNode.id);
-         }
+             var locator = imageryIndex.backgrounds.find(function (d) {
+               return d.overlay && d["default"];
+             });
 
-         function undone() {
-           // undoing removed the temp edit
-           _didResolveTempEdit = true;
-           context.pauseChangeDispatch();
-           var nextMode;
+             if (locator) {
+               background.toggleOverlayLayer(locator);
+             }
 
-           if (context.graph() === startGraph) {
-             // We've undone back to the initial state before we started drawing.
-             // Just exit the draw mode without undoing whatever we did before
-             // we entered the draw mode.
-             nextMode = modeSelect(context, [wayID]);
-           } else {
-             // The `undo` only removed the temporary edit, so here we have to
-             // manually undo to actually remove the last node we added. We can't
-             // use the `undo` function since the initial "add" graph doesn't have
-             // an annotation and so cannot be undone to.
-             context.pop(1); // continue drawing
+             var overlays = (hash.overlays || '').split(',');
+             overlays.forEach(function (overlay) {
+               overlay = background.findSource(overlay);
 
-             nextMode = mode;
-           } // clear the redo stack by adding and removing a blank edit
+               if (overlay) {
+                 background.toggleOverlayLayer(overlay);
+               }
+             });
 
+             if (hash.gpx) {
+               var gpx = context.layers().layer('data');
 
-           context.perform(actionNoop());
-           context.pop(1);
-           context.resumeChangeDispatch();
-           context.enter(nextMode);
-         }
+               if (gpx) {
+                 gpx.url(hash.gpx, '.gpx');
+               }
+             }
 
-         function setActiveElements() {
-           if (!_drawNode) return;
-           context.surface().selectAll('.' + _drawNode.id).classed('active', true);
-         }
+             if (hash.offset) {
+               var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
+                 return !isNaN(n) && n;
+               });
 
-         function resetToStartGraph() {
-           while (context.graph() !== startGraph) {
-             context.pop();
-           }
-         }
+               if (offset.length === 2) {
+                 background.offset(geoMetersToOffset(offset));
+               }
+             }
+           })["catch"](function () {
+             /* ignore */
+           });
+         };
 
-         var drawWay = function drawWay(surface) {
-           _drawNode = undefined;
-           _didResolveTempEdit = false;
-           _origWay = context.entity(wayID);
-           _headNodeID = typeof _nodeIndex === 'number' ? _origWay.nodes[_nodeIndex] : _origWay.isClosed() ? _origWay.nodes[_origWay.nodes.length - 2] : _origWay.nodes[_origWay.nodes.length - 1];
-           _wayGeometry = _origWay.geometry(context.graph());
-           _annotation = _t((_origWay.nodes.length === (_origWay.isClosed() ? 2 : 1) ? 'operations.start.annotation.' : 'operations.continue.annotation.') + _wayGeometry);
-           _pointerHasMoved = false; // Push an annotated state for undo to return back to.
-           // We must make sure to replace or remove it later.
+         return utilRebind(background, dispatch, 'on');
+       }
 
-           context.pauseChangeDispatch();
-           context.perform(actionNoop(), _annotation);
-           context.resumeChangeDispatch();
-           behavior.hover().initialNodeID(_headNodeID);
-           behavior.on('move', function () {
-             _pointerHasMoved = true;
-             move.apply(this, arguments);
-           }).on('down', function () {
-             move.apply(this, arguments);
-           }).on('downcancel', function () {
-             if (_drawNode) removeDrawNode();
-           }).on('click', drawWay.add).on('clickWay', drawWay.addWay).on('clickNode', drawWay.addNode).on('undo', context.undo).on('cancel', drawWay.cancel).on('finish', drawWay.finish);
-           select(window).on('keydown.drawWay', keydown).on('keyup.drawWay', keyup);
-           context.map().dblclickZoomEnable(false).on('drawn.draw', setActiveElements);
-           setActiveElements();
-           surface.call(behavior);
-           context.history().on('undone.draw', undone);
-         };
+       function rendererFeatures(context) {
+         var dispatch = dispatch$8('change', 'redraw');
+         var features = utilRebind({}, dispatch, 'on');
 
-         drawWay.off = function (surface) {
-           if (!_didResolveTempEdit) {
-             // Drawing was interrupted unexpectedly.
-             // This can happen if the user changes modes,
-             // clicks geolocate button, a hashchange event occurs, etc.
-             context.pauseChangeDispatch();
-             resetToStartGraph();
-             context.resumeChangeDispatch();
-           }
+         var _deferred = new Set();
 
-           _drawNode = undefined;
-           _nodeIndex = undefined;
-           context.map().on('drawn.draw', null);
-           surface.call(behavior.off).selectAll('.active').classed('active', false);
-           surface.classed('nope', false).classed('nope-suppressed', false).classed('nope-disabled', false);
-           select(window).on('keydown.drawWay', null).on('keyup.drawWay', null);
-           context.history().on('undone.draw', null);
+         var traffic_roads = {
+           'motorway': true,
+           'motorway_link': true,
+           'trunk': true,
+           'trunk_link': true,
+           'primary': true,
+           'primary_link': true,
+           'secondary': true,
+           'secondary_link': true,
+           'tertiary': true,
+           'tertiary_link': true,
+           'residential': true,
+           'unclassified': true,
+           'living_street': true
+         };
+         var service_roads = {
+           'service': true,
+           'road': true,
+           'track': true
+         };
+         var paths = {
+           'path': true,
+           'footway': true,
+           'cycleway': true,
+           'bridleway': true,
+           'steps': true,
+           'pedestrian': true
          };
+         var past_futures = {
+           'proposed': true,
+           'construction': true,
+           'abandoned': true,
+           'dismantled': true,
+           'disused': true,
+           'razed': true,
+           'demolished': true,
+           'obliterated': true
+         };
+         var _cullFactor = 1;
+         var _cache = {};
+         var _rules = {};
+         var _stats = {};
+         var _keys = [];
+         var _hidden = [];
+         var _forceVisible = {};
 
-         function attemptAdd(d, loc, doAdd) {
-           if (_drawNode) {
-             // move the node to the final loc in case move wasn't called
-             // consistently (e.g. on touch devices)
-             context.replace(actionMoveNode(_drawNode.id, loc), _annotation);
-             _drawNode = context.entity(_drawNode.id);
-           } else {
-             createDrawNode(loc);
-           }
-
-           checkGeometry(true
-           /* includeDrawNode */
-           );
+         function update() {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
+             var disabled = features.disabled();
 
-           if (d && d.properties && d.properties.nope || context.surface().classed('nope')) {
-             if (!_pointerHasMoved) {
-               // prevent the temporary draw node from appearing on touch devices
-               removeDrawNode();
+             if (disabled.length) {
+               hash.disable_features = disabled.join(',');
+             } else {
+               delete hash.disable_features;
              }
 
-             dispatch$1.call('rejectedSelfIntersection', this);
-             return; // can't click here
+             window.location.replace('#' + utilQsString(hash, true));
+             corePreferences('disabled-features', disabled.join(','));
            }
 
-           context.pauseChangeDispatch();
-           doAdd(); // we just replaced the temporary edit with the real one
-
-           _didResolveTempEdit = true;
-           context.resumeChangeDispatch();
-           context.enter(mode);
-         } // Accept the current position of the drawing node
-
-
-         drawWay.add = function (loc, d) {
-           attemptAdd(d, loc, function () {// don't need to do anything extra
-           });
-         }; // Connect the way to an existing way
-
-
-         drawWay.addWay = function (loc, edge, d) {
-           attemptAdd(d, loc, function () {
-             context.replace(actionAddMidpoint({
-               loc: loc,
-               edge: edge
-             }, _drawNode), _annotation);
-           });
-         }; // Connect the way to an existing node
-
+           _hidden = features.hidden();
+           dispatch.call('change');
+           dispatch.call('redraw');
+         }
 
-         drawWay.addNode = function (node, d) {
-           // finish drawing if the mapper targets the prior node
-           if (node.id === _headNodeID || // or the first node when drawing an area
-           _origWay.isClosed() && node.id === _origWay.first()) {
-             drawWay.finish();
-             return;
-           }
+         function defineRule(k, filter, max) {
+           var isEnabled = true;
 
-           attemptAdd(d, node.loc, function () {
-             context.replace(function actionReplaceDrawNode(graph) {
-               // remove the temporary draw node and insert the existing node
-               // at the same index
-               graph = graph.replace(graph.entity(wayID).removeNode(_drawNode.id)).remove(_drawNode);
-               return graph.replace(graph.entity(wayID).addNode(node.id, _nodeIndex));
-             }, _annotation);
-           });
-         }; // Finish the draw operation, removing the temporary edit.
-         // If the way has enough nodes to be valid, it's selected.
-         // Otherwise, delete everything and return to browse mode.
+           _keys.push(k);
 
+           _rules[k] = {
+             filter: filter,
+             enabled: isEnabled,
+             // whether the user wants it enabled..
+             count: 0,
+             currentMax: max || Infinity,
+             defaultMax: max || Infinity,
+             enable: function enable() {
+               this.enabled = true;
+               this.currentMax = this.defaultMax;
+             },
+             disable: function disable() {
+               this.enabled = false;
+               this.currentMax = 0;
+             },
+             hidden: function hidden() {
+               return this.count === 0 && !this.enabled || this.count > this.currentMax * _cullFactor;
+             },
+             autoHidden: function autoHidden() {
+               return this.hidden() && this.currentMax > 0;
+             }
+           };
+         }
 
-         drawWay.finish = function () {
-           checkGeometry(false
-           /* includeDrawNode */
-           );
+         defineRule('points', function isPoint(tags, geometry) {
+           return geometry === 'point';
+         }, 200);
+         defineRule('traffic_roads', function isTrafficRoad(tags) {
+           return traffic_roads[tags.highway];
+         });
+         defineRule('service_roads', function isServiceRoad(tags) {
+           return service_roads[tags.highway];
+         });
+         defineRule('paths', function isPath(tags) {
+           return paths[tags.highway];
+         });
+         defineRule('buildings', function isBuilding(tags) {
+           return !!tags.building && tags.building !== 'no' || tags.parking === 'multi-storey' || tags.parking === 'sheds' || tags.parking === 'carports' || tags.parking === 'garage_boxes';
+         }, 250);
+         defineRule('building_parts', function isBuildingPart(tags) {
+           return tags['building:part'];
+         });
+         defineRule('indoor', function isIndoor(tags) {
+           return tags.indoor;
+         });
+         defineRule('landuse', function isLanduse(tags, geometry) {
+           return geometry === 'area' && !_rules.buildings.filter(tags) && !_rules.building_parts.filter(tags) && !_rules.indoor.filter(tags) && !_rules.water.filter(tags) && !_rules.pistes.filter(tags);
+         });
+         defineRule('boundaries', function isBoundary(tags) {
+           return !!tags.boundary && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway] || tags.waterway || tags.railway || tags.landuse || tags.natural || tags.building || tags.power);
+         });
+         defineRule('water', function isWater(tags) {
+           return !!tags.waterway || tags.natural === 'water' || tags.natural === 'coastline' || tags.natural === 'bay' || tags.landuse === 'pond' || tags.landuse === 'basin' || tags.landuse === 'reservoir' || tags.landuse === 'salt_pond';
+         });
+         defineRule('rail', function isRail(tags) {
+           return (!!tags.railway || tags.landuse === 'railway') && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]);
+         });
+         defineRule('pistes', function isPiste(tags) {
+           return tags['piste:type'];
+         });
+         defineRule('aerialways', function isPiste(tags) {
+           return tags.aerialway && tags.aerialway !== 'yes' && tags.aerialway !== 'station';
+         });
+         defineRule('power', function isPower(tags) {
+           return !!tags.power;
+         }); // contains a past/future tag, but not in active use as a road/path/cycleway/etc..
 
-           if (context.surface().classed('nope')) {
-             dispatch$1.call('rejectedSelfIntersection', this);
-             return; // can't click here
+         defineRule('past_future', function isPastFuture(tags) {
+           if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
+             return false;
            }
 
-           context.pauseChangeDispatch(); // remove the temporary edit
+           var strings = Object.keys(tags);
 
-           context.pop(1);
-           _didResolveTempEdit = true;
-           context.resumeChangeDispatch();
-           var way = context.hasEntity(wayID);
+           for (var i = 0; i < strings.length; i++) {
+             var s = strings[i];
 
-           if (!way || way.isDegenerate()) {
-             drawWay.cancel();
-             return;
+             if (past_futures[s] || past_futures[tags[s]]) {
+               return true;
+             }
            }
 
-           window.setTimeout(function () {
-             context.map().dblclickZoomEnable(true);
-           }, 1000);
-           var isNewFeature = !mode.isContinuing;
-           context.enter(modeSelect(context, [wayID]).newFeature(isNewFeature));
-         }; // Cancel the draw operation, delete everything, and return to browse mode.
+           return false;
+         }); // Lines or areas that don't match another feature filter.
+         // IMPORTANT: The 'others' feature must be the last one defined,
+         //   so that code in getMatches can skip this test if `hasMatch = true`
 
+         defineRule('others', function isOther(tags, geometry) {
+           return geometry === 'line' || geometry === 'area';
+         });
 
-         drawWay.cancel = function () {
-           context.pauseChangeDispatch();
-           resetToStartGraph();
-           context.resumeChangeDispatch();
-           window.setTimeout(function () {
-             context.map().dblclickZoomEnable(true);
-           }, 1000);
-           context.surface().classed('nope', false).classed('nope-disabled', false).classed('nope-suppressed', false);
-           context.enter(modeBrowse(context));
+         features.features = function () {
+           return _rules;
          };
 
-         drawWay.nodeIndex = function (val) {
-           if (!arguments.length) return _nodeIndex;
-           _nodeIndex = val;
-           return drawWay;
+         features.keys = function () {
+           return _keys;
          };
 
-         drawWay.activeID = function () {
-           if (!arguments.length) return _drawNode && _drawNode.id; // no assign
+         features.enabled = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].enabled;
+             });
+           }
 
-           return drawWay;
+           return _rules[k] && _rules[k].enabled;
          };
 
-         return utilRebind(drawWay, dispatch$1, 'on');
-       }
+         features.disabled = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return !_rules[k].enabled;
+             });
+           }
 
-       function modeDrawLine(context, wayID, startGraph, button, affix, continuing) {
-         var mode = {
-           button: button,
-           id: 'draw-line'
+           return _rules[k] && !_rules[k].enabled;
          };
-         var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawLine', function () {
-           context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.lines'))();
-         });
-         mode.wayID = wayID;
-         mode.isContinuing = continuing;
 
-         mode.enter = function () {
-           behavior.nodeIndex(affix === 'prefix' ? 0 : undefined);
-           context.install(behavior);
-         };
+         features.hidden = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].hidden();
+             });
+           }
 
-         mode.exit = function () {
-           context.uninstall(behavior);
+           return _rules[k] && _rules[k].hidden();
          };
 
-         mode.selectedIDs = function () {
-           return [wayID];
-         };
+         features.autoHidden = function (k) {
+           if (!arguments.length) {
+             return _keys.filter(function (k) {
+               return _rules[k].autoHidden();
+             });
+           }
 
-         mode.activeID = function () {
-           return behavior && behavior.activeID() || [];
+           return _rules[k] && _rules[k].autoHidden();
          };
 
-         return mode;
-       }
-
-       function operationContinue(context, selectedIDs) {
-         var _entities = selectedIDs.map(function (id) {
-           return context.graph().entity(id);
-         });
+         features.enable = function (k) {
+           if (_rules[k] && !_rules[k].enabled) {
+             _rules[k].enable();
 
-         var _geometries = Object.assign({
-           line: [],
-           vertex: []
-         }, utilArrayGroupBy(_entities, function (entity) {
-           return entity.geometry(context.graph());
-         }));
+             update();
+           }
+         };
 
-         var _vertex = _geometries.vertex.length && _geometries.vertex[0];
+         features.enableAll = function () {
+           var didEnable = false;
 
-         function candidateWays() {
-           return _vertex ? context.graph().parentWays(_vertex).filter(function (parent) {
-             return parent.geometry(context.graph()) === 'line' && !parent.isClosed() && parent.affix(_vertex.id) && (_geometries.line.length === 0 || _geometries.line[0] === parent);
-           }) : [];
-         }
+           for (var k in _rules) {
+             if (!_rules[k].enabled) {
+               didEnable = true;
 
-         var _candidates = candidateWays();
+               _rules[k].enable();
+             }
+           }
 
-         var operation = function operation() {
-           var candidate = _candidates[0];
-           context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
+           if (didEnable) update();
          };
 
-         operation.relatedEntityIds = function () {
-           return _candidates.length ? [_candidates[0].id] : [];
-         };
+         features.disable = function (k) {
+           if (_rules[k] && _rules[k].enabled) {
+             _rules[k].disable();
 
-         operation.available = function () {
-           return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
+             update();
+           }
          };
 
-         operation.disabled = function () {
-           if (_candidates.length === 0) {
-             return 'not_eligible';
-           } else if (_candidates.length > 1) {
-             return 'multiple';
+         features.disableAll = function () {
+           var didDisable = false;
+
+           for (var k in _rules) {
+             if (_rules[k].enabled) {
+               didDisable = true;
+
+               _rules[k].disable();
+             }
            }
 
-           return false;
+           if (didDisable) update();
          };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
-         };
+         features.toggle = function (k) {
+           if (_rules[k]) {
+             (function (f) {
+               return f.enabled ? f.disable() : f.enable();
+             })(_rules[k]);
 
-         operation.annotation = function () {
-           return _t('operations.continue.annotation.line');
+             update();
+           }
          };
 
-         operation.id = 'continue';
-         operation.keys = [_t('operations.continue.key')];
-         operation.title = _t('operations.continue.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+         features.resetStats = function () {
+           for (var i = 0; i < _keys.length; i++) {
+             _rules[_keys[i]].count = 0;
+           }
 
-       function operationCopy(context, selectedIDs) {
-         function getFilteredIdsToCopy() {
-           return selectedIDs.filter(function (selectedID) {
-             var entity = context.graph().hasEntity(selectedID); // don't copy untagged vertices separately from ways
+           dispatch.call('change');
+         };
 
-             return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
-           });
-         }
+         features.gatherStats = function (d, resolver, dimensions) {
+           var needsRedraw = false;
+           var types = utilArrayGroupBy(d, 'type');
+           var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+           var currHidden, geometry, matches, i, j;
 
-         var operation = function operation() {
-           var graph = context.graph();
-           var selected = groupEntities(getFilteredIdsToCopy(), graph);
-           var canCopy = [];
-           var skip = {};
-           var entity;
-           var i;
+           for (i = 0; i < _keys.length; i++) {
+             _rules[_keys[i]].count = 0;
+           } // adjust the threshold for point/building culling based on viewport size..
+           // a _cullFactor of 1 corresponds to a 1000x1000px viewport..
 
-           for (i = 0; i < selected.relation.length; i++) {
-             entity = selected.relation[i];
 
-             if (!skip[entity.id] && entity.isComplete(graph)) {
-               canCopy.push(entity.id);
-               skip = getDescendants(entity.id, graph, skip);
-             }
-           }
+           _cullFactor = dimensions[0] * dimensions[1] / 1000000;
 
-           for (i = 0; i < selected.way.length; i++) {
-             entity = selected.way[i];
+           for (i = 0; i < entities.length; i++) {
+             geometry = entities[i].geometry(resolver);
+             matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
 
-             if (!skip[entity.id]) {
-               canCopy.push(entity.id);
-               skip = getDescendants(entity.id, graph, skip);
+             for (j = 0; j < matches.length; j++) {
+               _rules[matches[j]].count++;
              }
            }
 
-           for (i = 0; i < selected.node.length; i++) {
-             entity = selected.node[i];
+           currHidden = features.hidden();
 
-             if (!skip[entity.id]) {
-               canCopy.push(entity.id);
-             }
+           if (currHidden !== _hidden) {
+             _hidden = currHidden;
+             needsRedraw = true;
+             dispatch.call('change');
            }
 
-           context.copyIDs(canCopy);
-
-           if (_point && (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
-             // store the anchor coordinates if copying more than a single node
-             context.copyLonLat(context.projection.invert(_point));
-           } else {
-             context.copyLonLat(null);
-           }
+           return needsRedraw;
          };
 
-         function groupEntities(ids, graph) {
-           var entities = ids.map(function (id) {
-             return graph.entity(id);
-           });
-           return Object.assign({
-             relation: [],
-             way: [],
-             node: []
-           }, utilArrayGroupBy(entities, 'type'));
-         }
-
-         function getDescendants(id, graph, descendants) {
-           var entity = graph.entity(id);
-           var children;
-           descendants = descendants || {};
-
-           if (entity.type === 'relation') {
-             children = entity.members.map(function (m) {
-               return m.id;
-             });
-           } else if (entity.type === 'way') {
-             children = entity.nodes;
-           } else {
-             children = [];
-           }
-
-           for (var i = 0; i < children.length; i++) {
-             if (!descendants[children[i]]) {
-               descendants[children[i]] = true;
-               descendants = getDescendants(children[i], graph, descendants);
-             }
+         features.stats = function () {
+           for (var i = 0; i < _keys.length; i++) {
+             _stats[_keys[i]] = _rules[_keys[i]].count;
            }
 
-           return descendants;
-         }
-
-         operation.available = function () {
-           return getFilteredIdsToCopy().length > 0;
+           return _stats;
          };
 
-         operation.disabled = function () {
-           var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
-
-           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
+         features.clear = function (d) {
+           for (var i = 0; i < d.length; i++) {
+             features.clearEntity(d[i]);
            }
-
-           return false;
          };
 
-         operation.availableForKeypress = function () {
-           var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature
-
-           return !selection || !selection.toString();
+         features.clearEntity = function (entity) {
+           delete _cache[osmEntity.key(entity)];
          };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.copy.' + disable, {
-             n: selectedIDs.length
-           }) : _t('operations.copy.description', {
-             n: selectedIDs.length
-           });
-         };
+         features.reset = function () {
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
 
-         operation.annotation = function () {
-           return _t('operations.copy.annotation', {
-             n: selectedIDs.length
+             _deferred["delete"](handle);
            });
-         };
-
-         var _point;
+           _cache = {};
+         }; // only certain relations are worth checking
 
-         operation.point = function (val) {
-           _point = val;
-           return operation;
-         };
 
-         operation.id = 'copy';
-         operation.keys = [uiCmd('⌘C')];
-         operation.title = _t('operations.copy.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+         function relationShouldBeChecked(relation) {
+           // multipolygon features have `area` geometry and aren't checked here
+           return relation.tags.type === 'boundary';
+         }
 
-       function operationDisconnect(context, selectedIDs) {
-         var _vertexIDs = [];
-         var _wayIDs = [];
-         var _otherIDs = [];
-         var _actions = [];
-         selectedIDs.forEach(function (id) {
-           var entity = context.entity(id);
+         features.getMatches = function (entity, resolver, geometry) {
+           if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
+           var ent = osmEntity.key(entity);
 
-           if (entity.type === 'way') {
-             _wayIDs.push(id);
-           } else if (entity.geometry(context.graph()) === 'vertex') {
-             _vertexIDs.push(id);
-           } else {
-             _otherIDs.push(id);
+           if (!_cache[ent]) {
+             _cache[ent] = {};
            }
-         });
 
-         var _coords,
-             _descriptionID = '',
-             _annotationID = 'features';
+           if (!_cache[ent].matches) {
+             var matches = {};
+             var hasMatch = false;
 
-         var _disconnectingVertexIds = [];
-         var _disconnectingWayIds = [];
+             for (var i = 0; i < _keys.length; i++) {
+               if (_keys[i] === 'others') {
+                 if (hasMatch) continue; // If an entity...
+                 //   1. is a way that hasn't matched other 'interesting' feature rules,
 
-         if (_vertexIDs.length > 0) {
-           // At the selected vertices, disconnect the selected ways, if any, else
-           // disconnect all connected ways
-           _disconnectingVertexIds = _vertexIDs;
+                 if (entity.type === 'way') {
+                   var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
 
-           _vertexIDs.forEach(function (vertexID) {
-             var action = actionDisconnect(vertexID);
+                   if (parents.length === 1 && parents[0].isMultipolygon() || // 2b. or belongs only to boundary relations
+                   parents.length > 0 && parents.every(function (parent) {
+                     return parent.tags.type === 'boundary';
+                   })) {
+                     // ...then match whatever feature rules the parent relation has matched.
+                     // see #2548, #2887
+                     //
+                     // IMPORTANT:
+                     // For this to work, getMatches must be called on relations before ways.
+                     //
+                     var pkey = osmEntity.key(parents[0]);
 
-             if (_wayIDs.length > 0) {
-               var waysIDsForVertex = _wayIDs.filter(function (wayID) {
-                 var way = context.entity(wayID);
-                 return way.nodes.indexOf(vertexID) !== -1;
-               });
+                     if (_cache[pkey] && _cache[pkey].matches) {
+                       matches = Object.assign({}, _cache[pkey].matches); // shallow copy
 
-               action.limitWays(waysIDsForVertex);
+                       continue;
+                     }
+                   }
+                 }
+               }
+
+               if (_rules[_keys[i]].filter(entity.tags, geometry)) {
+                 matches[_keys[i]] = hasMatch = true;
+               }
              }
 
-             _actions.push(action);
+             _cache[ent].matches = matches;
+           }
 
-             _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
-               return d.id;
-             }));
-           });
+           return _cache[ent].matches;
+         };
 
-           _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
-             return _wayIDs.indexOf(id) === -1;
-           });
-           _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
+         features.getParents = function (entity, resolver, geometry) {
+           if (geometry === 'point') return [];
+           var ent = osmEntity.key(entity);
 
-           if (_wayIDs.length === 1) {
-             _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
-           } else {
-             _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
+           if (!_cache[ent]) {
+             _cache[ent] = {};
            }
-         } else if (_wayIDs.length > 0) {
-           // Disconnect the selected ways from each other, if they're connected,
-           // else disconnect them from all connected ways
-           var ways = _wayIDs.map(function (id) {
-             return context.entity(id);
-           });
-
-           var nodes = utilGetAllNodes(_wayIDs, context.graph());
-           _coords = nodes.map(function (n) {
-             return n.loc;
-           }); // actions for connected nodes shared by at least two selected ways
 
-           var sharedActions = [];
-           var sharedNodes = []; // actions for connected nodes
+           if (!_cache[ent].parents) {
+             var parents = [];
 
-           var unsharedActions = [];
-           var unsharedNodes = [];
-           nodes.forEach(function (node) {
-             var action = actionDisconnect(node.id).limitWays(_wayIDs);
+             if (geometry === 'vertex') {
+               parents = resolver.parentWays(entity);
+             } else {
+               // 'line', 'area', 'relation'
+               parents = resolver.parentRelations(entity);
+             }
 
-             if (action.disabled(context.graph()) !== 'not_connected') {
-               var count = 0;
+             _cache[ent].parents = parents;
+           }
 
-               for (var i in ways) {
-                 var way = ways[i];
+           return _cache[ent].parents;
+         };
 
-                 if (way.nodes.indexOf(node.id) !== -1) {
-                   count += 1;
-                 }
+         features.isHiddenPreset = function (preset, geometry) {
+           if (!_hidden.length) return false;
+           if (!preset.tags) return false;
+           var test = preset.setTags({}, geometry);
 
-                 if (count > 1) break;
+           for (var key in _rules) {
+             if (_rules[key].filter(test, geometry)) {
+               if (_hidden.indexOf(key) !== -1) {
+                 return key;
                }
 
-               if (count > 1) {
-                 sharedActions.push(action);
-                 sharedNodes.push(node);
-               } else {
-                 unsharedActions.push(action);
-                 unsharedNodes.push(node);
-               }
+               return false;
              }
+           }
+
+           return false;
+         };
+
+         features.isHiddenFeature = function (entity, resolver, geometry) {
+           if (!_hidden.length) return false;
+           if (!entity.version) return false;
+           if (_forceVisible[entity.id]) return false;
+           var matches = Object.keys(features.getMatches(entity, resolver, geometry));
+           return matches.length && matches.every(function (k) {
+             return features.hidden(k);
            });
-           _descriptionID += 'no_points.';
-           _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
+         };
 
-           if (sharedActions.length) {
-             // if any nodes are shared, only disconnect the selected ways from each other
-             _actions = sharedActions;
-             _disconnectingVertexIds = sharedNodes.map(function (node) {
-               return node.id;
-             });
-             _descriptionID += 'conjoined';
-             _annotationID = 'from_each_other';
-           } else {
-             // if no nodes are shared, disconnect the selected ways from all connected ways
-             _actions = unsharedActions;
-             _disconnectingVertexIds = unsharedNodes.map(function (node) {
-               return node.id;
-             });
+         features.isHiddenChild = function (entity, resolver, geometry) {
+           if (!_hidden.length) return false;
+           if (!entity.version || geometry === 'point') return false;
+           if (_forceVisible[entity.id]) return false;
+           var parents = features.getParents(entity, resolver, geometry);
+           if (!parents.length) return false;
 
-             if (_wayIDs.length === 1) {
-               _descriptionID += context.graph().geometry(_wayIDs[0]);
-             } else {
-               _descriptionID += 'separate';
+           for (var i = 0; i < parents.length; i++) {
+             if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
+               return false;
              }
            }
-         }
 
-         var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());
-
-         var operation = function operation() {
-           context.perform(function (graph) {
-             return _actions.reduce(function (graph, action) {
-               return action(graph);
-             }, graph);
-           }, operation.annotation());
-           context.validator().validate();
+           return true;
          };
 
-         operation.relatedEntityIds = function () {
-           if (_vertexIDs.length) {
-             return _disconnectingWayIds;
-           }
+         features.hasHiddenConnections = function (entity, resolver) {
+           if (!_hidden.length) return false;
+           var childNodes, connections;
 
-           return _disconnectingVertexIds;
+           if (entity.type === 'midpoint') {
+             childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
+             connections = [];
+           } else {
+             childNodes = entity.nodes ? resolver.childNodes(entity) : [];
+             connections = features.getParents(entity, resolver, entity.geometry(resolver));
+           } // gather ways connected to child nodes..
+
+
+           connections = childNodes.reduce(function (result, e) {
+             return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
+           }, connections);
+           return connections.some(function (e) {
+             return features.isHidden(e, resolver, e.geometry(resolver));
+           });
          };
 
-         operation.available = function () {
-           if (_actions.length === 0) return false;
-           if (_otherIDs.length !== 0) return false;
-           if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function (wayID) {
-             return _vertexIDs.some(function (vertexID) {
-               var way = context.entity(wayID);
-               return way.nodes.indexOf(vertexID) !== -1;
-             });
-           })) return false;
-           return true;
+         features.isHidden = function (entity, resolver, geometry) {
+           if (!_hidden.length) return false;
+           if (!entity.version) return false;
+           var fn = geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature;
+           return fn(entity, resolver, geometry);
          };
 
-         operation.disabled = function () {
-           var reason;
+         features.filter = function (d, resolver) {
+           if (!_hidden.length) return d;
+           var result = [];
 
-           for (var actionIndex in _actions) {
-             reason = _actions[actionIndex].disabled(context.graph());
-             if (reason) return reason;
-           }
+           for (var i = 0; i < d.length; i++) {
+             var entity = d[i];
 
-           if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
-           } else if (_coords && someMissing()) {
-             return 'not_downloaded';
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
+             if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
+               result.push(entity);
+             }
            }
 
-           return false;
+           return result;
+         };
 
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+         features.forceVisible = function (entityIDs) {
+           if (!arguments.length) return Object.keys(_forceVisible);
+           _forceVisible = {};
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+           for (var i = 0; i < entityIDs.length; i++) {
+             _forceVisible[entityIDs[i]] = true;
+             var entity = context.hasEntity(entityIDs[i]);
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
+             if (entity && entity.type === 'relation') {
+               // also show relation members (one level deep)
+               for (var j in entity.members) {
+                 _forceVisible[entity.members[j].id] = true;
                }
              }
-
-             return false;
            }
+
+           return features;
          };
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
+         features.init = function () {
+           var storage = corePreferences('disabled-features');
 
-           if (disable) {
-             return _t('operations.disconnect.' + disable);
+           if (storage) {
+             var storageDisabled = storage.replace(/;/g, ',').split(',');
+             storageDisabled.forEach(features.disable);
            }
 
-           return _t('operations.disconnect.description.' + _descriptionID);
-         };
+           var hash = utilStringQs(window.location.hash);
 
-         operation.annotation = function () {
-           return _t('operations.disconnect.annotation.' + _annotationID);
-         };
+           if (hash.disable_features) {
+             var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
+             hashDisabled.forEach(features.disable);
+           }
+         }; // warm up the feature matching cache upon merging fetched data
 
-         operation.id = 'disconnect';
-         operation.keys = [_t('operations.disconnect.key')];
-         operation.title = _t('operations.disconnect.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
 
-       function operationDowngrade(context, selectedIDs) {
-         var _affectedFeatureCount = 0;
+         context.history().on('merge.features', function (newEntities) {
+           if (!newEntities) return;
+           var handle = window.requestIdleCallback(function () {
+             var graph = context.graph();
+             var types = utilArrayGroupBy(newEntities, 'type'); // ensure that getMatches is called on relations before ways
 
-         var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
+             var entities = [].concat(types.relation || [], types.way || [], types.node || []);
 
-         var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
+             for (var i = 0; i < entities.length; i++) {
+               var geometry = entities[i].geometry(graph);
+               features.getMatches(entities[i], graph, geometry);
+             }
+           });
 
-         function downgradeTypeForEntityIDs(entityIds) {
-           var downgradeType;
-           _affectedFeatureCount = 0;
+           _deferred.add(handle);
+         });
+         return features;
+       }
 
-           for (var i in entityIds) {
-             var entityID = entityIds[i];
-             var type = downgradeTypeForEntityID(entityID);
+       //
+       // - the activeID - nope
+       // - 1 away (adjacent) to the activeID - yes (vertices will be merged)
+       // - 2 away from the activeID - nope (would create a self intersecting segment)
+       // - all others on a linear way - yes
+       // - all others on a closed way - nope (would create a self intersecting polygon)
+       //
+       // returns
+       // 0 = active vertex - no touch/connect
+       // 1 = passive vertex - yes touch/connect
+       // 2 = adjacent vertex - yes but pay attention segmenting a line here
+       //
 
-             if (type) {
-               _affectedFeatureCount += 1;
+       function svgPassiveVertex(node, graph, activeID) {
+         if (!activeID) return 1;
+         if (activeID === node.id) return 0;
+         var parents = graph.parentWays(node);
+         var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
 
-               if (downgradeType && type !== downgradeType) {
-                 if (downgradeType !== 'generic' && type !== 'generic') {
-                   downgradeType = 'building_address';
-                 } else {
-                   downgradeType = 'generic';
-                 }
-               } else {
-                 downgradeType = type;
+         for (i = 0; i < parents.length; i++) {
+           nodes = parents[i].nodes;
+           isClosed = parents[i].isClosed();
+
+           for (j = 0; j < nodes.length; j++) {
+             // find this vertex, look nearby
+             if (nodes[j] === node.id) {
+               ix1 = j - 2;
+               ix2 = j - 1;
+               ix3 = j + 1;
+               ix4 = j + 2;
+
+               if (isClosed) {
+                 // wraparound if needed
+                 max = nodes.length - 1;
+                 if (ix1 < 0) ix1 = max + ix1;
+                 if (ix2 < 0) ix2 = max + ix2;
+                 if (ix3 > max) ix3 = ix3 - max;
+                 if (ix4 > max) ix4 = ix4 - max;
                }
+
+               if (nodes[ix1] === activeID) return 0; // no - prevent self intersect
+               else if (nodes[ix2] === activeID) return 2; // ok - adjacent
+               else if (nodes[ix3] === activeID) return 2; // ok - adjacent
+               else if (nodes[ix4] === activeID) return 0; // no - prevent self intersect
+               else if (isClosed && nodes.indexOf(activeID) !== -1) return 0; // no - prevent self intersect
              }
            }
-
-           return downgradeType;
          }
 
-         function downgradeTypeForEntityID(entityID) {
-           var graph = context.graph();
-           var entity = graph.entity(entityID);
-           var preset = _mainPresetIndex.match(entity, graph);
-           if (!preset || preset.isFallback()) return null;
+         return 1; // ok
+       }
+       function svgMarkerSegments(projection, graph, dt, shouldReverse, bothDirections) {
+         return function (entity) {
+           var i = 0;
+           var offset = dt;
+           var segments = [];
+           var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
+           var coordinates = graph.childNodes(entity).map(function (n) {
+             return n.loc;
+           });
+           var a, b;
 
-           if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
-             return key.match(/^addr:.{1,}/);
-           })) {
-             return 'address';
+           if (shouldReverse(entity)) {
+             coordinates.reverse();
            }
 
-           var geometry = entity.geometry(graph);
+           d3_geoStream({
+             type: 'LineString',
+             coordinates: coordinates
+           }, projection.stream(clip({
+             lineStart: function lineStart() {},
+             lineEnd: function lineEnd() {
+               a = null;
+             },
+             point: function point(x, y) {
+               b = [x, y];
 
-           if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
-             return 'building';
-           }
+               if (a) {
+                 var span = geoVecLength(a, b) - offset;
 
-           if (geometry === 'vertex' && Object.keys(entity.tags).length) {
-             return 'generic';
-           }
+                 if (span >= 0) {
+                   var heading = geoVecAngle(a, b);
+                   var dx = dt * Math.cos(heading);
+                   var dy = dt * Math.sin(heading);
+                   var p = [a[0] + offset * Math.cos(heading), a[1] + offset * Math.sin(heading)]; // gather coordinates
 
-           return null;
-         }
+                   var coord = [a, p];
 
-         var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
-         var addressKeysToKeep = ['source'];
+                   for (span -= dt; span >= 0; span -= dt) {
+                     p = geoVecAdd(p, [dx, dy]);
+                     coord.push(p);
+                   }
 
-         var operation = function operation() {
-           context.perform(function (graph) {
-             for (var i in selectedIDs) {
-               var entityID = selectedIDs[i];
-               var type = downgradeTypeForEntityID(entityID);
-               if (!type) continue;
-               var tags = Object.assign({}, graph.entity(entityID).tags); // shallow copy
+                   coord.push(b); // generate svg paths
 
-               for (var key in tags) {
-                 if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
+                   var segment = '';
+                   var j;
 
-                 if (type === 'building') {
-                   if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
-                 }
+                   for (j = 0; j < coord.length; j++) {
+                     segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+                   }
 
-                 if (type !== 'generic') {
-                   if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
-                 }
+                   segments.push({
+                     id: entity.id,
+                     index: i++,
+                     d: segment
+                   });
 
-                 delete tags[key];
-               }
+                   if (bothDirections(entity)) {
+                     segment = '';
 
-               graph = actionChangeTags(entityID, tags)(graph);
-             }
+                     for (j = coord.length - 1; j >= 0; j--) {
+                       segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
+                     }
 
-             return graph;
-           }, operation.annotation());
-           context.validator().validate(); // refresh the select mode to enable the delete operation
+                     segments.push({
+                       id: entity.id,
+                       index: i++,
+                       d: segment
+                     });
+                   }
+                 }
 
-           context.enter(modeSelect(context, selectedIDs));
-         };
+                 offset = -span;
+               }
 
-         operation.available = function () {
-           return _downgradeType;
+               a = b;
+             }
+           })));
+           return segments;
          };
-
-         operation.disabled = function () {
-           if (selectedIDs.some(hasWikidataTag)) {
-             return 'has_wikidata_tag';
-           }
-
-           return false;
-
-           function hasWikidataTag(id) {
-             var entity = context.entity(id);
-             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+       }
+       function svgPath(projection, graph, isArea) {
+         // Explanation of magic numbers:
+         // "padding" here allows space for strokes to extend beyond the viewport,
+         // so that the stroke isn't drawn along the edge of the viewport when
+         // the shape is clipped.
+         //
+         // When drawing lines, pad viewport by 5px.
+         // When drawing areas, pad viewport by 65px in each direction to allow
+         // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
+         var cache = {};
+         var padding = isArea ? 65 : 5;
+         var viewport = projection.clipExtent();
+         var paddedExtent = [[viewport[0][0] - padding, viewport[0][1] - padding], [viewport[1][0] + padding, viewport[1][1] + padding]];
+         var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
+         var project = projection.stream;
+         var path = d3_geoPath().projection({
+           stream: function stream(output) {
+             return project(clip(output));
            }
-         };
+         });
 
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+         var svgpath = function svgpath(entity) {
+           if (entity.id in cache) {
+             return cache[entity.id];
+           } else {
+             return cache[entity.id] = path(entity.asGeoJSON(graph));
+           }
          };
 
-         operation.annotation = function () {
-           var suffix;
-
-           if (_downgradeType === 'building_address') {
-             suffix = 'generic';
+         svgpath.geojson = function (d) {
+           if (d.__featurehash__ !== undefined) {
+             if (d.__featurehash__ in cache) {
+               return cache[d.__featurehash__];
+             } else {
+               return cache[d.__featurehash__] = path(d);
+             }
            } else {
-             suffix = _downgradeType;
+             return path(d);
            }
-
-           return _t('operations.downgrade.annotation.' + suffix, {
-             n: _affectedFeatureCount
-           });
          };
 
-         operation.id = 'downgrade';
-         operation.keys = [uiCmd('⌫')];
-         operation.title = _t('operations.downgrade.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
+         return svgpath;
        }
+       function svgPointTransform(projection) {
+         var svgpoint = function svgpoint(entity) {
+           // http://jsperf.com/short-array-join
+           var pt = projection(entity.loc);
+           return 'translate(' + pt[0] + ',' + pt[1] + ')';
+         };
 
-       function operationExtract(context, selectedIDs) {
-         var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
+         svgpoint.geojson = function (d) {
+           return svgpoint(d.properties.entity);
+         };
 
-         var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
-           return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
-         }).filter(Boolean));
+         return svgpoint;
+       }
+       function svgRelationMemberTags(graph) {
+         return function (entity) {
+           var tags = entity.tags;
+           var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
+           graph.parentRelations(entity).forEach(function (relation) {
+             var type = relation.tags.type;
 
-         var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
+             if (type === 'multipolygon' && shouldCopyMultipolygonTags || type === 'boundary') {
+               tags = Object.assign({}, relation.tags, tags);
+             }
+           });
+           return tags;
+         };
+       }
+       function svgSegmentWay(way, graph, activeID) {
+         // When there is no activeID, we can memoize this expensive computation
+         if (activeID === undefined) {
+           return graph["transient"](way, 'waySegments', getWaySegments);
+         } else {
+           return getWaySegments();
+         }
 
-         var _extent;
+         function getWaySegments() {
+           var isActiveWay = way.nodes.indexOf(activeID) !== -1;
+           var features = {
+             passive: [],
+             active: []
+           };
+           var start = {};
+           var end = {};
+           var node, type;
 
-         var _actions = selectedIDs.map(function (entityID) {
-           var graph = context.graph();
-           var entity = graph.hasEntity(entityID);
-           if (!entity || !entity.hasInterestingTags()) return null;
-           if (entity.type === 'node' && graph.parentWays(entity).length === 0) return null;
+           for (var i = 0; i < way.nodes.length; i++) {
+             node = graph.entity(way.nodes[i]);
+             type = svgPassiveVertex(node, graph, activeID);
+             end = {
+               node: node,
+               type: type
+             };
 
-           if (entity.type !== 'node') {
-             var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points
+             if (start.type !== undefined) {
+               if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {
+                 // one adjacent vertex
+                 pushActive(start, end, i);
+               } else if (start.type === 0 && end.type === 0) {
+                 // both active vertices
+                 pushActive(start, end, i);
+               } else {
+                 pushPassive(start, end, i);
+               }
+             }
 
-             if (preset.geometry.indexOf('point') === -1) return null;
+             start = end;
            }
 
-           _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
-           return actionExtract(entityID);
-         }).filter(Boolean);
+           return features;
 
-         var operation = function operation() {
-           var combinedAction = function combinedAction(graph) {
-             _actions.forEach(function (action) {
-               graph = action(graph);
+           function pushActive(start, end, index) {
+             features.active.push({
+               type: 'Feature',
+               id: way.id + '-' + index + '-nope',
+               properties: {
+                 nope: true,
+                 target: true,
+                 entity: way,
+                 nodes: [start.node, end.node],
+                 index: index
+               },
+               geometry: {
+                 type: 'LineString',
+                 coordinates: [start.node.loc, end.node.loc]
+               }
              });
+           }
 
-             return graph;
-           };
-
-           context.perform(combinedAction, operation.annotation()); // do the extract
-
-           var extractedNodeIDs = _actions.map(function (action) {
-             return action.getExtractedNodeID();
-           });
+           function pushPassive(start, end, index) {
+             features.passive.push({
+               type: 'Feature',
+               id: way.id + '-' + index,
+               properties: {
+                 target: true,
+                 entity: way,
+                 nodes: [start.node, end.node],
+                 index: index
+               },
+               geometry: {
+                 type: 'LineString',
+                 coordinates: [start.node.loc, end.node.loc]
+               }
+             });
+           }
+         }
+       }
 
-           context.enter(modeSelect(context, extractedNodeIDs));
-         };
+       function svgTagClasses() {
+         var primaries = ['building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway', 'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse', 'leisure', 'military', 'place', 'man_made', 'route', 'attraction', 'building:part', 'indoor'];
+         var statuses = [// nonexistent, might be built
+         'proposed', 'planned', // under maintentance or between groundbreaking and opening
+         'construction', // existent but not functional
+         'disused', // dilapidated to nonexistent
+         'abandoned', // nonexistent, still may appear in imagery
+         'dismantled', 'razed', 'demolished', 'obliterated', // existent occasionally, e.g. stormwater drainage basin
+         'intermittent'];
+         var secondaries = ['oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier', 'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport', 'public_transport', 'location', 'parking', 'golf', 'type', 'leisure', 'man_made', 'indoor', 'construction', 'proposed'];
 
-         operation.available = function () {
-           return _actions.length && selectedIDs.length === _actions.length;
+         var _tags = function _tags(entity) {
+           return entity.tags;
          };
 
-         operation.disabled = function () {
-           if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
-           } else if (selectedIDs.some(function (entityID) {
-             return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
-           })) {
-             return 'connected_to_hidden';
-           }
+         var tagClasses = function tagClasses(selection) {
+           selection.each(function tagClassesEach(entity) {
+             var value = this.className;
 
-           return false;
-         };
+             if (value.baseVal !== undefined) {
+               value = value.baseVal;
+             }
 
-         operation.tooltip = function () {
-           var disableReason = operation.disabled();
+             var t = _tags(entity);
 
-           if (disableReason) {
-             return _t('operations.extract.' + disableReason + '.' + _amount);
-           } else {
-             return _t('operations.extract.description.' + _geometryID + '.' + _amount);
-           }
-         };
+             var computed = tagClasses.getClassesString(t, value);
 
-         operation.annotation = function () {
-           return _t('operations.extract.annotation', {
-             n: selectedIDs.length
+             if (computed !== value) {
+               select(this).attr('class', computed);
+             }
            });
          };
 
-         operation.id = 'extract';
-         operation.keys = [_t('operations.extract.key')];
-         operation.title = _t('operations.extract.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
-
-       function operationMerge(context, selectedIDs) {
-         var _action = getAction();
+         tagClasses.getClassesString = function (t, value) {
+           var primary, status;
+           var i, j, k, v; // in some situations we want to render perimeter strokes a certain way
 
-         function getAction() {
-           // prefer a non-disabled action first
-           var join = actionJoin(selectedIDs);
-           if (!join.disabled(context.graph())) return join;
-           var merge = actionMerge(selectedIDs);
-           if (!merge.disabled(context.graph())) return merge;
-           var mergePolygon = actionMergePolygon(selectedIDs);
-           if (!mergePolygon.disabled(context.graph())) return mergePolygon;
-           var mergeNodes = actionMergeNodes(selectedIDs);
-           if (!mergeNodes.disabled(context.graph())) return mergeNodes; // otherwise prefer an action with an interesting disabled reason
+           var overrideGeometry;
 
-           if (join.disabled(context.graph()) !== 'not_eligible') return join;
-           if (merge.disabled(context.graph()) !== 'not_eligible') return merge;
-           if (mergePolygon.disabled(context.graph()) !== 'not_eligible') return mergePolygon;
-           return mergeNodes;
-         }
+           if (/\bstroke\b/.test(value)) {
+             if (!!t.barrier && t.barrier !== 'no') {
+               overrideGeometry = 'line';
+             }
+           } // preserve base classes (nothing with `tag-`)
 
-         var operation = function operation() {
-           if (operation.disabled()) return;
-           context.perform(_action, operation.annotation());
-           context.validator().validate();
-           var resultIDs = selectedIDs.filter(context.hasEntity);
 
-           if (resultIDs.length > 1) {
-             var interestingIDs = resultIDs.filter(function (id) {
-               return context.entity(id).hasInterestingTags();
-             });
-             if (interestingIDs.length) resultIDs = interestingIDs;
-           }
+           var classes = value.trim().split(/\s+/).filter(function (klass) {
+             return klass.length && !/^tag-/.test(klass);
+           }).map(function (klass) {
+             // special overrides for some perimeter strokes
+             return klass === 'line' || klass === 'area' ? overrideGeometry || klass : klass;
+           }); // pick at most one primary classification tag..
 
-           context.enter(modeSelect(context, resultIDs));
-         };
+           for (i = 0; i < primaries.length; i++) {
+             k = primaries[i];
+             v = t[k];
+             if (!v || v === 'no') continue;
 
-         operation.available = function () {
-           return selectedIDs.length >= 2;
-         };
+             if (k === 'piste:type') {
+               // avoid a ':' in the class name
+               k = 'piste';
+             } else if (k === 'building:part') {
+               // avoid a ':' in the class name
+               k = 'building_part';
+             }
 
-         operation.disabled = function () {
-           var actionDisabled = _action.disabled(context.graph());
+             primary = k;
 
-           if (actionDisabled) return actionDisabled;
-           var osm = context.connection();
+             if (statuses.indexOf(v) !== -1) {
+               // e.g. `railway=abandoned`
+               status = v;
+               classes.push('tag-' + k);
+             } else {
+               classes.push('tag-' + k);
+               classes.push('tag-' + k + '-' + v);
+             }
 
-           if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
-             return 'too_many_vertices';
+             break;
            }
 
-           return false;
-         };
-
-         operation.tooltip = function () {
-           var disabled = operation.disabled();
+           if (!primary) {
+             for (i = 0; i < statuses.length; i++) {
+               for (j = 0; j < primaries.length; j++) {
+                 k = statuses[i] + ':' + primaries[j]; // e.g. `demolished:building=yes`
 
-           if (disabled) {
-             if (disabled === 'restriction') {
-               return _t('operations.merge.restriction', {
-                 relation: _mainPresetIndex.item('type/restriction').name()
-               });
+                 v = t[k];
+                 if (!v || v === 'no') continue;
+                 status = statuses[i];
+                 break;
+               }
              }
+           } // add at most one status tag, only if relates to primary tag..
 
-             return _t('operations.merge.' + disabled);
-           }
-
-           return _t('operations.merge.description');
-         };
-
-         operation.annotation = function () {
-           return _t('operations.merge.annotation', {
-             n: selectedIDs.length
-           });
-         };
 
-         operation.id = 'merge';
-         operation.keys = [_t('operations.merge.key')];
-         operation.title = _t('operations.merge.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+           if (!status) {
+             for (i = 0; i < statuses.length; i++) {
+               k = statuses[i];
+               v = t[k];
+               if (!v || v === 'no') continue;
 
-       function operationPaste(context) {
-         var _pastePoint;
+               if (v === 'yes') {
+                 // e.g. `railway=rail + abandoned=yes`
+                 status = k;
+               } else if (primary && primary === v) {
+                 // e.g. `railway=rail + abandoned=railway`
+                 status = k;
+               } else if (!primary && primaries.indexOf(v) !== -1) {
+                 // e.g. `abandoned=railway`
+                 status = k;
+                 primary = v;
+                 classes.push('tag-' + v);
+               } // else ignore e.g.  `highway=path + abandoned=railway`
 
-         var operation = function operation() {
-           if (!_pastePoint) return;
-           var oldIDs = context.copyIDs();
-           if (!oldIDs.length) return;
-           var projection = context.projection;
-           var extent = geoExtent();
-           var oldGraph = context.copyGraph();
-           var newIDs = [];
-           var action = actionCopyEntities(oldIDs, oldGraph);
-           context.perform(action);
-           var copies = action.copies();
-           var originals = new Set();
-           Object.values(copies).forEach(function (entity) {
-             originals.add(entity.id);
-           });
 
-           for (var id in copies) {
-             var oldEntity = oldGraph.entity(id);
-             var newEntity = copies[id];
+               if (status) break;
+             }
+           }
 
-             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
+           if (status) {
+             classes.push('tag-status');
+             classes.push('tag-status-' + status);
+           } // add any secondary tags
 
 
-             var parents = context.graph().parentWays(newEntity);
-             var parentCopied = parents.some(function (parent) {
-               return originals.has(parent.id);
-             });
+           for (i = 0; i < secondaries.length; i++) {
+             k = secondaries[i];
+             v = t[k];
+             if (!v || v === 'no' || k === primary) continue;
+             classes.push('tag-' + k);
+             classes.push('tag-' + k + '-' + v);
+           } // For highways, look for surface tagging..
 
-             if (!parentCopied) {
-               newIDs.push(newEntity.id);
-             }
-           } // Use the location of the copy operation to offset the paste location,
-           // or else use the center of the pasted extent
 
+           if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
+             var surface = t.highway === 'track' ? 'unpaved' : 'paved';
 
-           var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
-           var delta = geoVecSubtract(_pastePoint, copyPoint); // Move the pasted objects to be anchored at the paste location
+             for (k in t) {
+               v = t[k];
 
-           context.replace(actionMove(newIDs, delta, projection), operation.annotation());
-           context.enter(modeSelect(context, newIDs));
-         };
+               if (k in osmPavedTags) {
+                 surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
+               }
 
-         operation.point = function (val) {
-           _pastePoint = val;
-           return operation;
-         };
+               if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
+                 surface = 'semipaved';
+               }
+             }
 
-         operation.available = function () {
-           return context.mode().id === 'browse';
-         };
+             classes.push('tag-' + surface);
+           } // If this is a wikidata-tagged item, add a class for that..
 
-         operation.disabled = function () {
-           return !context.copyIDs().length;
-         };
 
-         operation.tooltip = function () {
-           var oldGraph = context.copyGraph();
-           var ids = context.copyIDs();
+           var qid = t.wikidata || t['flag:wikidata'] || t['brand:wikidata'] || t['network:wikidata'] || t['operator:wikidata'];
 
-           if (!ids.length) {
-             return _t('operations.paste.nothing_copied');
+           if (qid) {
+             classes.push('tag-wikidata');
            }
 
-           return _t('operations.paste.description', {
-             feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
-             n: ids.length
-           });
+           return classes.join(' ').trim();
          };
 
-         operation.annotation = function () {
-           var ids = context.copyIDs();
-           return _t('operations.paste.annotation', {
-             n: ids.length
-           });
+         tagClasses.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
+           return tagClasses;
          };
 
-         operation.id = 'paste';
-         operation.keys = [uiCmd('⌘V')];
-         operation.title = _t('operations.paste.title');
-         return operation;
+         return tagClasses;
        }
 
-       function operationReverse(context, selectedIDs) {
-         var operation = function operation() {
-           context.perform(function combinedReverseAction(graph) {
-             actions().forEach(function (action) {
-               graph = action(graph);
-             });
-             return graph;
-           }, operation.annotation());
-           context.validator().validate();
-         };
-
-         function actions(situation) {
-           return selectedIDs.map(function (entityID) {
-             var entity = context.hasEntity(entityID);
-             if (!entity) return null;
-
-             if (situation === 'toolbar') {
-               if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
-             }
-
-             var geometry = entity.geometry(context.graph());
-             if (entity.type !== 'node' && geometry !== 'line') return null;
-             var action = actionReverse(entityID);
-             if (action.disabled(context.graph())) return null;
-             return action;
-           }).filter(Boolean);
+       // Patterns only work in Firefox when set directly on element.
+       // (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
+       var patterns = {
+         // tag - pattern name
+         // -or-
+         // tag - value - pattern name
+         // -or-
+         // tag - value - rules (optional tag-values, pattern name)
+         // (matches earlier rules first, so fallback should be last entry)
+         amenity: {
+           grave_yard: 'cemetery',
+           fountain: 'water_standing'
+         },
+         landuse: {
+           cemetery: [{
+             religion: 'christian',
+             pattern: 'cemetery_christian'
+           }, {
+             religion: 'buddhist',
+             pattern: 'cemetery_buddhist'
+           }, {
+             religion: 'muslim',
+             pattern: 'cemetery_muslim'
+           }, {
+             religion: 'jewish',
+             pattern: 'cemetery_jewish'
+           }, {
+             pattern: 'cemetery'
+           }],
+           construction: 'construction',
+           farmland: 'farmland',
+           farmyard: 'farmyard',
+           forest: [{
+             leaf_type: 'broadleaved',
+             pattern: 'forest_broadleaved'
+           }, {
+             leaf_type: 'needleleaved',
+             pattern: 'forest_needleleaved'
+           }, {
+             leaf_type: 'leafless',
+             pattern: 'forest_leafless'
+           }, {
+             pattern: 'forest'
+           } // same as 'leaf_type:mixed'
+           ],
+           grave_yard: 'cemetery',
+           grass: [{
+             golf: 'green',
+             pattern: 'golf_green'
+           }, {
+             pattern: 'grass'
+           }],
+           landfill: 'landfill',
+           meadow: 'meadow',
+           military: 'construction',
+           orchard: 'orchard',
+           quarry: 'quarry',
+           vineyard: 'vineyard'
+         },
+         natural: {
+           beach: 'beach',
+           grassland: 'grass',
+           sand: 'beach',
+           scrub: 'scrub',
+           water: [{
+             water: 'pond',
+             pattern: 'pond'
+           }, {
+             water: 'reservoir',
+             pattern: 'water_standing'
+           }, {
+             pattern: 'waves'
+           }],
+           wetland: [{
+             wetland: 'marsh',
+             pattern: 'wetland_marsh'
+           }, {
+             wetland: 'swamp',
+             pattern: 'wetland_swamp'
+           }, {
+             wetland: 'bog',
+             pattern: 'wetland_bog'
+           }, {
+             wetland: 'reedbed',
+             pattern: 'wetland_reedbed'
+           }, {
+             pattern: 'wetland'
+           }],
+           wood: [{
+             leaf_type: 'broadleaved',
+             pattern: 'forest_broadleaved'
+           }, {
+             leaf_type: 'needleleaved',
+             pattern: 'forest_needleleaved'
+           }, {
+             leaf_type: 'leafless',
+             pattern: 'forest_leafless'
+           }, {
+             pattern: 'forest'
+           } // same as 'leaf_type:mixed'
+           ]
+         },
+         traffic_calming: {
+           island: [{
+             surface: 'grass',
+             pattern: 'grass'
+           }],
+           chicane: [{
+             surface: 'grass',
+             pattern: 'grass'
+           }],
+           choker: [{
+             surface: 'grass',
+             pattern: 'grass'
+           }]
          }
-
-         function reverseTypeID() {
-           var acts = actions();
-           var nodeActionCount = acts.filter(function (act) {
-             var entity = context.hasEntity(act.entityID());
-             return entity && entity.type === 'node';
-           }).length;
-           if (nodeActionCount === 0) return 'line';
-           if (nodeActionCount === acts.length) return 'point';
-           return 'feature';
+       };
+       function svgTagPattern(tags) {
+         // Skip pattern filling if this is a building (buildings don't get patterns applied)
+         if (tags.building && tags.building !== 'no') {
+           return null;
          }
 
-         operation.available = function (situation) {
-           return actions(situation).length > 0;
-         };
-
-         operation.disabled = function () {
-           return false;
-         };
-
-         operation.tooltip = function () {
-           return _t('operations.reverse.description.' + reverseTypeID());
-         };
-
-         operation.annotation = function () {
-           var acts = actions();
-           return _t('operations.reverse.annotation.' + reverseTypeID(), {
-             n: acts.length
-           });
-         };
-
-         operation.id = 'reverse';
-         operation.keys = [_t('operations.reverse.key')];
-         operation.title = _t('operations.reverse.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
-
-       function operationSplit(context, selectedIDs) {
-         var _vertexIds = selectedIDs.filter(function (id) {
-           return context.graph().geometry(id) === 'vertex';
-         });
+         for (var tag in patterns) {
+           var entityValue = tags[tag];
+           if (!entityValue) continue;
 
-         var _selectedWayIds = selectedIDs.filter(function (id) {
-           var entity = context.graph().hasEntity(id);
-           return entity && entity.type === 'way';
-         });
+           if (typeof patterns[tag] === 'string') {
+             // extra short syntax (just tag) - pattern name
+             return 'pattern-' + patterns[tag];
+           } else {
+             var values = patterns[tag];
 
-         var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
+             for (var value in values) {
+               if (entityValue !== value) continue;
+               var rules = values[value];
 
-         var _action = actionSplit(_vertexIds);
+               if (typeof rules === 'string') {
+                 // short syntax - pattern name
+                 return 'pattern-' + rules;
+               } // long syntax - rule array
 
-         var _ways = [];
-         var _geometry = 'feature';
-         var _waysAmount = 'single';
 
-         var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
+               for (var ruleKey in rules) {
+                 var rule = rules[ruleKey];
+                 var pass = true;
 
-         if (_isAvailable) {
-           if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
-           _ways = _action.ways(context.graph());
-           var geometries = {};
+                 for (var criterion in rule) {
+                   if (criterion !== 'pattern') {
+                     // reserved for pattern name
+                     // The only rule is a required tag-value pair
+                     var v = tags[criterion];
 
-           _ways.forEach(function (way) {
-             geometries[way.geometry(context.graph())] = true;
-           });
+                     if (!v || v !== rule[criterion]) {
+                       pass = false;
+                       break;
+                     }
+                   }
+                 }
 
-           if (Object.keys(geometries).length === 1) {
-             _geometry = Object.keys(geometries)[0];
+                 if (pass) {
+                   return 'pattern-' + rule.pattern;
+                 }
+               }
+             }
            }
-
-           _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
          }
 
-         var operation = function operation() {
-           var difference = context.perform(_action, operation.annotation()); // select both the nodes and the ways so the mapper can immediately disconnect them if desired
-
-           var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
-             // filter out relations that may have had member additions
-             return context.entity(id).type === 'way';
-           }));
-
-           context.enter(modeSelect(context, idsToSelect));
-         };
-
-         operation.relatedEntityIds = function () {
-           return _selectedWayIds.length ? [] : _ways.map(function (way) {
-             return way.id;
-           });
-         };
-
-         operation.available = function () {
-           return _isAvailable;
-         };
+         return null;
+       }
 
-         operation.disabled = function () {
-           var reason = _action.disabled(context.graph());
+       function svgAreas(projection, context) {
+         function getPatternStyle(tags) {
+           var imageID = svgTagPattern(tags);
 
-           if (reason) {
-             return reason;
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
+           if (imageID) {
+             return 'url("#ideditor-' + imageID + '")';
            }
 
-           return false;
-         };
-
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           if (disable) return _t('operations.split.' + disable);
-           return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
-         };
+           return '';
+         }
 
-         operation.annotation = function () {
-           return _t('operations.split.annotation.' + _geometry, {
-             n: _ways.length
-           });
-         };
+         function drawTargets(selection, graph, entities, filter) {
+           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+           var getPath = svgPath(projection).geojson;
+           var activeID = context.activeID();
+           var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
 
-         operation.id = 'split';
-         operation.keys = [_t('operations.split.key')];
-         operation.title = _t('operations.split.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
+           var data = {
+             targets: [],
+             nopes: []
+           };
+           entities.forEach(function (way) {
+             var features = svgSegmentWay(way, graph, activeID);
+             data.targets.push.apply(data.targets, features.passive);
+             data.nopes.push.apply(data.nopes, features.active);
+           }); // Targets allow hover and vertex snapping
 
-       function operationStraighten(context, selectedIDs) {
-         var _wayIDs = selectedIDs.filter(function (id) {
-           return id.charAt(0) === 'w';
-         });
+           var targetData = data.targets.filter(getPath);
+           var targets = selection.selectAll('.area.target-allowed').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(targetData, function key(d) {
+             return d.id;
+           }); // exit
 
-         var _nodeIDs = selectedIDs.filter(function (id) {
-           return id.charAt(0) === 'n';
-         });
+           targets.exit().remove();
 
-         var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
+           var segmentWasEdited = function segmentWasEdited(d) {
+             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-         var _nodes = utilGetAllNodes(selectedIDs, context.graph());
+             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+               return false;
+             }
 
-         var _coords = _nodes.map(function (n) {
-           return n.loc;
-         });
+             return d.properties.nodes.some(function (n) {
+               return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+             });
+           }; // enter/update
 
-         var _extent = utilTotalExtent(selectedIDs, context.graph());
 
-         var _action = chooseAction();
+           targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+             return 'way area target target-allowed ' + targetClass + d.id;
+           }).classed('segment-edited', segmentWasEdited); // NOPE
 
-         var _geometry;
+           var nopeData = data.nopes.filter(getPath);
+           var nopes = selection.selectAll('.area.target-nope').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(nopeData, function key(d) {
+             return d.id;
+           }); // exit
 
-         function chooseAction() {
-           // straighten selected nodes
-           if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
-             _geometry = 'point';
-             return actionStraightenNodes(_nodeIDs, context.projection); // straighten selected ways (possibly between range of 2 selected nodes)
-           } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
-             var startNodeIDs = [];
-             var endNodeIDs = [];
+           nopes.exit().remove(); // enter/update
 
-             for (var i = 0; i < selectedIDs.length; i++) {
-               var entity = context.entity(selectedIDs[i]);
+           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+             return 'way area target target-nope ' + nopeClass + d.id;
+           }).classed('segment-edited', segmentWasEdited);
+         }
 
-               if (entity.type === 'node') {
-                 continue;
-               } else if (entity.type !== 'way' || entity.isClosed()) {
-                 return null; // exit early, can't straighten these
-               }
+         function drawAreas(selection, graph, entities, filter) {
+           var path = svgPath(projection, graph, true);
+           var areas = {};
+           var multipolygon;
+           var base = context.history().base();
 
-               startNodeIDs.push(entity.first());
-               endNodeIDs.push(entity.last());
-             } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (entity.geometry(graph) !== 'area') continue;
+             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
 
+             if (multipolygon) {
+               areas[multipolygon.id] = {
+                 entity: multipolygon.mergeTags(entity.tags),
+                 area: Math.abs(entity.area(graph))
+               };
+             } else if (!areas[entity.id]) {
+               areas[entity.id] = {
+                 entity: entity,
+                 area: Math.abs(entity.area(graph))
+               };
+             }
+           }
 
-             startNodeIDs = startNodeIDs.filter(function (n) {
-               return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
-             });
-             endNodeIDs = endNodeIDs.filter(function (n) {
-               return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
-             }); // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
+           var fills = Object.values(areas).filter(function hasPath(a) {
+             return path(a.entity);
+           });
+           fills.sort(function areaSort(a, b) {
+             return b.area - a.area;
+           });
+           fills = fills.map(function (a) {
+             return a.entity;
+           });
+           var strokes = fills.filter(function (area) {
+             return area.type === 'way';
+           });
+           var data = {
+             clip: fills,
+             shadow: strokes,
+             stroke: strokes,
+             fill: fills
+           };
+           var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm').filter(filter).data(data.clip, osmEntity.key);
+           clipPaths.exit().remove();
+           var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-osm').attr('id', function (entity) {
+             return 'ideditor-' + entity.id + '-clippath';
+           });
+           clipPathsEnter.append('path');
+           clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', path);
+           var drawLayer = selection.selectAll('.layer-osm.areas');
+           var touchLayer = selection.selectAll('.layer-touch.areas'); // Draw areas..
 
-             if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
+           var areagroup = drawLayer.selectAll('g.areagroup').data(['fill', 'shadow', 'stroke']);
+           areagroup = areagroup.enter().append('g').attr('class', function (d) {
+             return 'areagroup area-' + d;
+           }).merge(areagroup);
+           var paths = areagroup.selectAll('path').filter(filter).data(function (layer) {
+             return data[layer];
+           }, osmEntity.key);
+           paths.exit().remove();
+           var fillpaths = selection.selectAll('.area-fill path.area').nodes();
+           var bisect = d3_bisector(function (node) {
+             return -node.__data__.area(graph);
+           }).left;
 
-             var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph()).map(function (node) {
-               return node.id;
-             });
-             if (wayNodeIDs.length <= 2) return null; // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path
+           function sortedByArea(entity) {
+             if (this._parent.__data__ === 'fill') {
+               return fillpaths[bisect(fillpaths, -entity.area(graph))];
+             }
+           }
 
-             if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
+           paths = paths.enter().insert('path', sortedByArea).merge(paths).each(function (entity) {
+             var layer = this.parentNode.__data__;
+             this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
 
-             if (_nodeIDs.length) {
-               // If we're only straightenting between two points, we only need that extent visible
-               _extent = utilTotalExtent(_nodeIDs, context.graph());
+             if (layer === 'fill') {
+               this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
+               this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
              }
+           }).classed('added', function (d) {
+             return !base.entities[d.id];
+           }).classed('geometry-edited', function (d) {
+             return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+           }).classed('retagged', function (d) {
+             return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+           }).call(svgTagClasses()).attr('d', path); // Draw touch targets..
 
-             _geometry = 'line';
-             return actionStraightenWay(selectedIDs, context.projection);
-           }
-
-           return null;
+           touchLayer.call(drawTargets, graph, data.stroke, filter);
          }
 
-         function operation() {
-           if (!_action) return;
-           context.perform(_action, operation.annotation());
-           window.setTimeout(function () {
-             context.validator().validate();
-           }, 300); // after any transition
-         }
+         return drawAreas;
+       }
 
-         operation.available = function () {
-           return Boolean(_action);
+       var fastJsonStableStringify = function fastJsonStableStringify(data, opts) {
+         if (!opts) opts = {};
+         if (typeof opts === 'function') opts = {
+           cmp: opts
          };
+         var cycles = typeof opts.cycles === 'boolean' ? opts.cycles : false;
 
-         operation.disabled = function () {
-           var reason = _action.disabled(context.graph());
+         var cmp = opts.cmp && function (f) {
+           return function (node) {
+             return function (a, b) {
+               var aobj = {
+                 key: a,
+                 value: node[a]
+               };
+               var bobj = {
+                 key: b,
+                 value: node[b]
+               };
+               return f(aobj, bobj);
+             };
+           };
+         }(opts.cmp);
 
-           if (reason) {
-             return reason;
-           } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
-             return 'too_large';
-           } else if (someMissing()) {
-             return 'not_downloaded';
-           } else if (selectedIDs.some(context.hasHiddenConnections)) {
-             return 'connected_to_hidden';
+         var seen = [];
+         return function stringify(node) {
+           if (node && node.toJSON && typeof node.toJSON === 'function') {
+             node = node.toJSON();
            }
 
-           return false;
-
-           function someMissing() {
-             if (context.inIntro()) return false;
-             var osm = context.connection();
+           if (node === undefined) return;
+           if (typeof node == 'number') return isFinite(node) ? '' + node : 'null';
+           if (_typeof(node) !== 'object') return JSON.stringify(node);
+           var i, out;
 
-             if (osm) {
-               var missing = _coords.filter(function (loc) {
-                 return !osm.isDataLoaded(loc);
-               });
+           if (Array.isArray(node)) {
+             out = '[';
 
-               if (missing.length) {
-                 missing.forEach(function (loc) {
-                   context.loadTileAtLoc(loc);
-                 });
-                 return true;
-               }
+             for (i = 0; i < node.length; i++) {
+               if (i) out += ',';
+               out += stringify(node[i]) || 'null';
              }
 
-             return false;
+             return out + ']';
            }
-         };
-
-         operation.tooltip = function () {
-           var disable = operation.disabled();
-           return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
-         };
-
-         operation.annotation = function () {
-           return _t('operations.straighten.annotation.' + _geometry, {
-             n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
-           });
-         };
-
-         operation.id = 'straighten';
-         operation.keys = [_t('operations.straighten.key')];
-         operation.title = _t('operations.straighten.title');
-         operation.behavior = behaviorOperation(context).which(operation);
-         return operation;
-       }
-
-       var Operations = /*#__PURE__*/Object.freeze({
-               __proto__: null,
-               operationCircularize: operationCircularize,
-               operationContinue: operationContinue,
-               operationCopy: operationCopy,
-               operationDelete: operationDelete,
-               operationDisconnect: operationDisconnect,
-               operationDowngrade: operationDowngrade,
-               operationExtract: operationExtract,
-               operationMerge: operationMerge,
-               operationMove: operationMove,
-               operationOrthogonalize: operationOrthogonalize,
-               operationPaste: operationPaste,
-               operationReflectShort: operationReflectShort,
-               operationReflectLong: operationReflectLong,
-               operationReverse: operationReverse,
-               operationRotate: operationRotate,
-               operationSplit: operationSplit,
-               operationStraighten: operationStraighten
-       });
 
-       var _relatedParent;
+           if (node === null) return 'null';
 
-       function modeSelect(context, selectedIDs) {
-         var mode = {
-           id: 'select',
-           button: 'browse'
-         };
-         var keybinding = utilKeybinding('select');
+           if (seen.indexOf(node) !== -1) {
+             if (cycles) return JSON.stringify('__cycle__');
+             throw new TypeError('Converting circular structure to JSON');
+           }
 
-         var _breatheBehavior = behaviorBreathe();
+           var seenIndex = seen.push(node) - 1;
+           var keys = Object.keys(node).sort(cmp && cmp(node));
+           out = '';
 
-         var _modeDragNode = modeDragNode(context);
+           for (i = 0; i < keys.length; i++) {
+             var key = keys[i];
+             var value = stringify(node[key]);
+             if (!value) continue;
+             if (out) out += ',';
+             out += JSON.stringify(key) + ':' + value;
+           }
 
-         var _selectBehavior;
+           seen.splice(seenIndex, 1);
+           return '{' + out + '}';
+         }(data);
+       };
 
-         var _behaviors = [];
-         var _operations = [];
-         var _newFeature = false;
-         var _follow = false;
+       var $$1 = _export;
+       var $entries = objectToArray.entries;
 
-         function singular() {
-           if (selectedIDs && selectedIDs.length === 1) {
-             return context.hasEntity(selectedIDs[0]);
-           }
+       // `Object.entries` method
+       // https://tc39.es/ecma262/#sec-object.entries
+       $$1({ target: 'Object', stat: true }, {
+         entries: function entries(O) {
+           return $entries(O);
          }
+       });
 
-         function selectedEntities() {
-           return selectedIDs.map(function (id) {
-             return context.hasEntity(id);
-           }).filter(Boolean);
+       var _marked = /*#__PURE__*/regeneratorRuntime.mark(gpxGen),
+           _marked3 = /*#__PURE__*/regeneratorRuntime.mark(kmlGen);
+
+       // cast array x into numbers
+       // get the content of a text node, if any
+       function nodeVal(x) {
+         if (x && x.normalize) {
+           x.normalize();
          }
 
-         function checkSelectedIDs() {
-           var ids = [];
+         return x && x.textContent || "";
+       } // one Y child of X, if any, otherwise null
 
-           if (Array.isArray(selectedIDs)) {
-             ids = selectedIDs.filter(function (id) {
-               return context.hasEntity(id);
-             });
-           }
 
-           if (!ids.length) {
-             context.enter(modeBrowse(context));
-             return false;
-           } else if (selectedIDs.length > 1 && ids.length === 1 || selectedIDs.length === 1 && ids.length > 1) {
-             // switch between single- and multi-select UI
-             context.enter(modeSelect(context, ids));
-             return false;
+       function get1(x, y) {
+         var n = x.getElementsByTagName(y);
+         return n.length ? n[0] : null;
+       }
+
+       function getLineStyle(extensions) {
+         var style = {};
+
+         if (extensions) {
+           var lineStyle = get1(extensions, "line");
+
+           if (lineStyle) {
+             var color = nodeVal(get1(lineStyle, "color")),
+                 opacity = parseFloat(nodeVal(get1(lineStyle, "opacity"))),
+                 width = parseFloat(nodeVal(get1(lineStyle, "width")));
+             if (color) style.stroke = color;
+             if (!isNaN(opacity)) style["stroke-opacity"] = opacity; // GPX width is in mm, convert to px with 96 px per inch
+
+             if (!isNaN(width)) style["stroke-width"] = width * 96 / 25.4;
            }
+         }
 
-           selectedIDs = ids;
-           return true;
-         } // find the common parent ways for nextVertex, previousVertex
+         return style;
+       } // get the contents of multiple text nodes, if present
 
 
-         function commonParents() {
-           var graph = context.graph();
-           var commonParents = [];
+       function getMulti(x, ys) {
+         var o = {};
+         var n;
+         var k;
 
-           for (var i = 0; i < selectedIDs.length; i++) {
-             var entity = context.hasEntity(selectedIDs[i]);
+         for (k = 0; k < ys.length; k++) {
+           n = get1(x, ys[k]);
+           if (n) o[ys[k]] = nodeVal(n);
+         }
 
-             if (!entity || entity.geometry(graph) !== 'vertex') {
-               return []; // selection includes some not vertices
-             }
+         return o;
+       }
 
-             var currParents = graph.parentWays(entity).map(function (w) {
-               return w.id;
-             });
+       function getProperties$1(node) {
+         var prop = getMulti(node, ["name", "cmt", "desc", "type", "time", "keywords"]); // Parse additional data from our Garmin extension(s)
 
-             if (!commonParents.length) {
-               commonParents = currParents;
-               continue;
-             }
+         var extensions = node.getElementsByTagNameNS("http://www.garmin.com/xmlschemas/GpxExtensions/v3", "*");
 
-             commonParents = utilArrayIntersection(commonParents, currParents);
+         for (var i = 0; i < extensions.length; i++) {
+           var extension = extensions[i]; // Ignore nested extensions, like those on routepoints or trackpoints
 
-             if (!commonParents.length) {
-               return [];
-             }
+           if (extension.parentNode.parentNode === node) {
+             prop[extension.tagName.replace(":", "_")] = nodeVal(extension);
            }
+         }
+
+         var links = node.getElementsByTagName("link");
+         if (links.length) prop.links = [];
 
-           return commonParents;
+         for (var _i = 0; _i < links.length; _i++) {
+           prop.links.push(Object.assign({
+             href: links[_i].getAttribute("href")
+           }, getMulti(links[_i], ["text", "type"])));
          }
 
-         function singularParent() {
-           var parents = commonParents();
+         return prop;
+       }
 
-           if (!parents || parents.length === 0) {
-             _relatedParent = null;
-             return null;
-           } // relatedParent is used when we visit a vertex with multiple
-           // parents, and we want to remember which parent line we started on.
+       function coordPair$1(x) {
+         var ll = [parseFloat(x.getAttribute("lon")), parseFloat(x.getAttribute("lat"))];
+         var ele = get1(x, "ele"); // handle namespaced attribute in browser
 
+         var heart = get1(x, "gpxtpx:hr") || get1(x, "hr");
+         var time = get1(x, "time");
+         var e;
 
-           if (parents.length === 1) {
-             _relatedParent = parents[0]; // remember this parent for later
+         if (ele) {
+           e = parseFloat(nodeVal(ele));
 
-             return _relatedParent;
+           if (!isNaN(e)) {
+             ll.push(e);
            }
+         }
 
-           if (parents.indexOf(_relatedParent) !== -1) {
-             return _relatedParent; // prefer the previously seen parent
-           }
+         var result = {
+           coordinates: ll,
+           time: time ? nodeVal(time) : null,
+           extendedValues: []
+         };
 
-           return parents[0];
+         if (heart) {
+           result.extendedValues.push(["heart", parseFloat(nodeVal(heart))]);
          }
 
-         mode.selectedIDs = function (val) {
-           if (!arguments.length) return selectedIDs;
-           selectedIDs = val;
-           return mode;
-         };
+         var extensions = get1(x, "extensions");
 
-         mode.zoomToSelected = function () {
-           context.map().zoomToEase(selectedEntities());
-         };
+         if (extensions !== null) {
+           for (var _i2 = 0, _arr = ["speed", "course", "hAcc", "vAcc"]; _i2 < _arr.length; _i2++) {
+             var name = _arr[_i2];
+             var v = parseFloat(nodeVal(get1(extensions, name)));
 
-         mode.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return mode;
-         };
+             if (!isNaN(v)) {
+               result.extendedValues.push([name, v]);
+             }
+           }
+         }
 
-         mode.selectBehavior = function (val) {
-           if (!arguments.length) return _selectBehavior;
-           _selectBehavior = val;
-           return mode;
-         };
+         return result;
+       }
 
-         mode.follow = function (val) {
-           if (!arguments.length) return _follow;
-           _follow = val;
-           return mode;
+       function getRoute(node) {
+         var line = getPoints$1(node, "rtept");
+         if (!line) return;
+         return {
+           type: "Feature",
+           properties: Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
+             _gpxType: "rte"
+           }),
+           geometry: {
+             type: "LineString",
+             coordinates: line.line
+           }
          };
+       }
 
-         function loadOperations() {
-           _operations.forEach(function (operation) {
-             if (operation.behavior) {
-               context.uninstall(operation.behavior);
-             }
-           });
+       function getPoints$1(node, pointname) {
+         var pts = node.getElementsByTagName(pointname);
+         if (pts.length < 2) return; // Invalid line in GeoJSON
 
-           _operations = Object.values(Operations).map(function (o) {
-             return o(context, selectedIDs);
-           }).filter(function (o) {
-             return o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy';
-           }).concat([// group copy/downgrade/delete operation together at the end of the list
-           operationCopy(context, selectedIDs), operationDowngrade(context, selectedIDs), operationDelete(context, selectedIDs)]).filter(function (operation) {
-             return operation.available();
-           });
+         var line = [];
+         var times = [];
+         var extendedValues = {};
 
-           _operations.forEach(function (operation) {
-             if (operation.behavior) {
-               context.install(operation.behavior);
-             }
-           }); // remove any displayed menu
+         for (var i = 0; i < pts.length; i++) {
+           var c = coordPair$1(pts[i]);
+           line.push(c.coordinates);
+           if (c.time) times.push(c.time);
 
+           for (var j = 0; j < c.extendedValues.length; j++) {
+             var _c$extendedValues$j = _slicedToArray(c.extendedValues[j], 2),
+                 name = _c$extendedValues$j[0],
+                 val = _c$extendedValues$j[1];
 
-           context.ui().closeEditMenu();
+             var plural = name === "heart" ? name : name + "s";
+
+             if (!extendedValues[plural]) {
+               extendedValues[plural] = Array(pts.length).fill(null);
+             }
+
+             extendedValues[plural][i] = val;
+           }
          }
 
-         mode.operations = function () {
-           return _operations;
+         return {
+           line: line,
+           times: times,
+           extendedValues: extendedValues
          };
+       }
 
-         mode.enter = function () {
-           if (!checkSelectedIDs()) return;
-           context.features().forceVisible(selectedIDs);
-
-           _modeDragNode.restoreSelectedIDs(selectedIDs);
+       function getTrack(node) {
+         var segments = node.getElementsByTagName("trkseg");
+         var track = [];
+         var times = [];
+         var extractedLines = [];
 
-           loadOperations();
+         for (var i = 0; i < segments.length; i++) {
+           var line = getPoints$1(segments[i], "trkpt");
 
-           if (!_behaviors.length) {
-             if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
-             _behaviors = [behaviorPaste(context), _breatheBehavior, behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect), _selectBehavior, behaviorLasso(context), _modeDragNode.behavior, modeDragNote(context).behavior];
+           if (line) {
+             extractedLines.push(line);
+             if (line.times && line.times.length) times.push(line.times);
            }
+         }
 
-           _behaviors.forEach(context.install);
+         if (extractedLines.length === 0) return;
+         var multi = extractedLines.length > 1;
+         var properties = Object.assign(getProperties$1(node), getLineStyle(get1(node, "extensions")), {
+           _gpxType: "trk"
+         }, times.length ? {
+           coordinateProperties: {
+             times: multi ? times : times[0]
+           }
+         } : {});
 
-           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on(['[', 'pgup'], previousVertex).on([']', 'pgdown'], nextVertex).on(['{', uiCmd('⌘['), 'home'], firstVertex).on(['}', uiCmd('⌘]'), 'end'], lastVertex).on(uiCmd('⇧←'), nudgeSelection([-10, 0])).on(uiCmd('⇧↑'), nudgeSelection([0, -10])).on(uiCmd('⇧→'), nudgeSelection([10, 0])).on(uiCmd('⇧↓'), nudgeSelection([0, 10])).on(uiCmd('⇧⌥←'), nudgeSelection([-100, 0])).on(uiCmd('⇧⌥↑'), nudgeSelection([0, -100])).on(uiCmd('⇧⌥→'), nudgeSelection([100, 0])).on(uiCmd('⇧⌥↓'), nudgeSelection([0, 100])).on(utilKeybinding.plusKeys.map(function (key) {
-             return uiCmd('⇧' + key);
-           }), scaleSelection(1.05)).on(utilKeybinding.plusKeys.map(function (key) {
-             return uiCmd('⇧⌥' + key);
-           }), scaleSelection(Math.pow(1.05, 5))).on(utilKeybinding.minusKeys.map(function (key) {
-             return uiCmd('⇧' + key);
-           }), scaleSelection(1 / 1.05)).on(utilKeybinding.minusKeys.map(function (key) {
-             return uiCmd('⇧⌥' + key);
-           }), scaleSelection(1 / Math.pow(1.05, 5))).on(['\\', 'pause'], nextParent).on('⎋', esc, true);
-           select(document).call(keybinding);
-           context.ui().sidebar.select(selectedIDs, _newFeature);
-           context.history().on('change.select', function () {
-             loadOperations(); // reselect after change in case relation members were removed or added
+         for (var _i3 = 0; _i3 < extractedLines.length; _i3++) {
+           var _line = extractedLines[_i3];
+           track.push(_line.line);
 
-             selectElements();
-           }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
-           context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
-             selectElements();
+           for (var _i4 = 0, _Object$entries = Object.entries(_line.extendedValues); _i4 < _Object$entries.length; _i4++) {
+             var _Object$entries$_i = _slicedToArray(_Object$entries[_i4], 2),
+                 name = _Object$entries$_i[0],
+                 val = _Object$entries$_i[1];
 
-             _breatheBehavior.restartIfNeeded(context.surface());
-           });
-           context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
-           selectElements();
+             var props = properties;
 
-           if (_follow) {
-             var extent = geoExtent();
-             var graph = context.graph();
-             selectedIDs.forEach(function (id) {
-               var entity = context.entity(id);
+             if (name === "heart") {
+               if (!properties.coordinateProperties) {
+                 properties.coordinateProperties = {};
+               }
 
-               extent._extend(entity.extent(graph));
-             });
-             var loc = extent.center();
-             context.map().centerEase(loc); // we could enter the mode multiple times, so reset follow for next time
+               props = properties.coordinateProperties;
+             }
 
-             _follow = false;
+             if (multi) {
+               if (!props[name]) props[name] = extractedLines.map(function (line) {
+                 return new Array(line.line.length).fill(null);
+               });
+               props[name][_i3] = val;
+             } else {
+               props[name] = val;
+             }
            }
+         }
 
-           function nudgeSelection(delta) {
-             return function () {
-               // prevent nudging during low zoom selection
-               if (!context.map().withinEditableZoom()) return;
-               var moveOp = operationMove(context, selectedIDs);
+         return {
+           type: "Feature",
+           properties: properties,
+           geometry: multi ? {
+             type: "MultiLineString",
+             coordinates: track
+           } : {
+             type: "LineString",
+             coordinates: track[0]
+           }
+         };
+       }
 
-               if (moveOp.disabled()) {
-                 context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();
-               } else {
-                 context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
-                 context.validator().validate();
-               }
-             };
+       function getPoint(node) {
+         return {
+           type: "Feature",
+           properties: Object.assign(getProperties$1(node), getMulti(node, ["sym"])),
+           geometry: {
+             type: "Point",
+             coordinates: coordPair$1(node).coordinates
            }
+         };
+       }
 
-           function scaleSelection(factor) {
-             return function () {
-               // prevent scaling during low zoom selection
-               if (!context.map().withinEditableZoom()) return;
-               var nodes = utilGetAllNodes(selectedIDs, context.graph());
-               var isUp = factor > 1; // can only scale if multiple nodes are selected
+       function gpxGen(doc) {
+         var tracks, routes, waypoints, i, feature, _i5, _feature, _i6;
 
-               if (nodes.length <= 1) return;
-               var extent = utilTotalExtent(selectedIDs, context.graph()); // These disabled checks would normally be handled by an operation
-               // object, but we don't want an actual scale operation at this point.
+         return regeneratorRuntime.wrap(function gpxGen$(_context) {
+           while (1) {
+             switch (_context.prev = _context.next) {
+               case 0:
+                 tracks = doc.getElementsByTagName("trk");
+                 routes = doc.getElementsByTagName("rte");
+                 waypoints = doc.getElementsByTagName("wpt");
+                 i = 0;
 
-               function scalingDisabled() {
-                 if (tooSmall()) {
-                   return 'too_small';
-                 } else if (extent.percentContainedIn(context.map().extent()) < 0.8) {
-                   return 'too_large';
-                 } else if (someMissing() || selectedIDs.some(incompleteRelation)) {
-                   return 'not_downloaded';
-                 } else if (selectedIDs.some(context.hasHiddenConnections)) {
-                   return 'connected_to_hidden';
+               case 4:
+                 if (!(i < tracks.length)) {
+                   _context.next = 12;
+                   break;
                  }
 
-                 return false;
+                 feature = getTrack(tracks[i]);
 
-                 function tooSmall() {
-                   if (isUp) return false;
-                   var dLon = Math.abs(extent[1][0] - extent[0][0]);
-                   var dLat = Math.abs(extent[1][1] - extent[0][1]);
-                   return dLon < geoMetersToLon(1, extent[1][1]) && dLat < geoMetersToLat(1);
+                 if (!feature) {
+                   _context.next = 9;
+                   break;
                  }
 
-                 function someMissing() {
-                   if (context.inIntro()) return false;
-                   var osm = context.connection();
+                 _context.next = 9;
+                 return feature;
 
-                   if (osm) {
-                     var missing = nodes.filter(function (n) {
-                       return !osm.isDataLoaded(n.loc);
-                     });
+               case 9:
+                 i++;
+                 _context.next = 4;
+                 break;
 
-                     if (missing.length) {
-                       missing.forEach(function (loc) {
-                         context.loadTileAtLoc(loc);
-                       });
-                       return true;
-                     }
-                   }
+               case 12:
+                 _i5 = 0;
 
-                   return false;
+               case 13:
+                 if (!(_i5 < routes.length)) {
+                   _context.next = 21;
+                   break;
                  }
 
-                 function incompleteRelation(id) {
-                   var entity = context.entity(id);
-                   return entity.type === 'relation' && !entity.isComplete(context.graph());
+                 _feature = getRoute(routes[_i5]);
+
+                 if (!_feature) {
+                   _context.next = 18;
+                   break;
                  }
-               }
 
-               var disabled = scalingDisabled();
+                 _context.next = 18;
+                 return _feature;
 
-               if (disabled) {
-                 var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
-                 context.ui().flash.duration(4000).iconName('#iD-icon-no').iconClass('operation disabled').label(_t('operations.scale.' + disabled + '.' + multi))();
-               } else {
-                 var pivot = context.projection(extent.center());
-                 var annotation = _t('operations.scale.annotation.' + (isUp ? 'up' : 'down') + '.feature', {
-                   n: selectedIDs.length
-                 });
-                 context.perform(actionScale(selectedIDs, pivot, factor, context.projection), annotation);
-                 context.validator().validate();
-               }
-             };
-           }
+               case 18:
+                 _i5++;
+                 _context.next = 13;
+                 break;
 
-           function didDoubleUp(d3_event, loc) {
-             if (!context.map().withinEditableZoom()) return;
-             var target = select(d3_event.target);
-             var datum = target.datum();
-             var entity = datum && datum.properties && datum.properties.entity;
-             if (!entity) return;
+               case 21:
+                 _i6 = 0;
 
-             if (entity instanceof osmWay && target.classed('target')) {
-               var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
-               var prev = entity.nodes[choice.index - 1];
-               var next = entity.nodes[choice.index];
-               context.perform(actionAddMidpoint({
-                 loc: choice.loc,
-                 edge: [prev, next]
-               }, osmNode()), _t('operations.add.annotation.vertex'));
-             } else if (entity.type === 'midpoint') {
-               context.perform(actionAddMidpoint({
-                 loc: entity.loc,
-                 edge: entity.edge
-               }, osmNode()), _t('operations.add.annotation.vertex'));
-             }
-           }
+               case 22:
+                 if (!(_i6 < waypoints.length)) {
+                   _context.next = 28;
+                   break;
+                 }
 
-           function selectElements() {
-             if (!checkSelectedIDs()) return;
-             var surface = context.surface();
-             surface.selectAll('.selected-member').classed('selected-member', false);
-             surface.selectAll('.selected').classed('selected', false);
-             surface.selectAll('.related').classed('related', false);
-             singularParent();
+                 _context.next = 25;
+                 return getPoint(waypoints[_i6]);
 
-             if (_relatedParent) {
-               surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
-             }
+               case 25:
+                 _i6++;
+                 _context.next = 22;
+                 break;
 
-             if (context.map().withinEditableZoom()) {
-               // Apply selection styling if not in wide selection
-               surface.selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true
-               /* skipMultipolgonMembers */
-               )).classed('selected-member', true);
-               surface.selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph())).classed('selected', true);
+               case 28:
+               case "end":
+                 return _context.stop();
              }
            }
+         }, _marked);
+       }
 
-           function esc() {
-             if (context.container().select('.combobox').size()) return;
-             context.enter(modeBrowse(context));
-           }
-
-           function firstVertex(d3_event) {
-             d3_event.preventDefault();
-             var entity = singular();
-             var parent = singularParent();
-             var way;
+       function gpx(doc) {
+         return {
+           type: "FeatureCollection",
+           features: Array.from(gpxGen(doc))
+         };
+       }
 
-             if (entity && entity.type === 'way') {
-               way = entity;
-             } else if (parent) {
-               way = context.entity(parent);
-             }
+       var removeSpace = /\s*/g;
+       var trimSpace = /^\s*|\s*$/g;
+       var splitSpace = /\s+/; // generate a short, numeric hash of a string
 
-             if (way) {
-               context.enter(modeSelect(context, [way.first()]).follow(true));
-             }
-           }
+       function okhash(x) {
+         if (!x || !x.length) return 0;
+         var h = 0;
 
-           function lastVertex(d3_event) {
-             d3_event.preventDefault();
-             var entity = singular();
-             var parent = singularParent();
-             var way;
+         for (var i = 0; i < x.length; i++) {
+           h = (h << 5) - h + x.charCodeAt(i) | 0;
+         }
 
-             if (entity && entity.type === 'way') {
-               way = entity;
-             } else if (parent) {
-               way = context.entity(parent);
-             }
+         return h;
+       } // get one coordinate from a coordinate array, if any
 
-             if (way) {
-               context.enter(modeSelect(context, [way.last()]).follow(true));
-             }
-           }
 
-           function previousVertex(d3_event) {
-             d3_event.preventDefault();
-             var parent = singularParent();
-             if (!parent) return;
-             var way = context.entity(parent);
-             var length = way.nodes.length;
-             var curr = way.nodes.indexOf(selectedIDs[0]);
-             var index = -1;
+       function coord1(v) {
+         return v.replace(removeSpace, "").split(",").map(parseFloat);
+       } // get all coordinates from a coordinate array as [[],[]]
 
-             if (curr > 0) {
-               index = curr - 1;
-             } else if (way.isClosed()) {
-               index = length - 2;
-             }
 
-             if (index !== -1) {
-               context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
-             }
-           }
+       function coord(v) {
+         return v.replace(trimSpace, "").split(splitSpace).map(coord1);
+       }
 
-           function nextVertex(d3_event) {
-             d3_event.preventDefault();
-             var parent = singularParent();
-             if (!parent) return;
-             var way = context.entity(parent);
-             var length = way.nodes.length;
-             var curr = way.nodes.indexOf(selectedIDs[0]);
-             var index = -1;
+       function xml2str(node) {
+         if (node.xml !== undefined) return node.xml;
 
-             if (curr < length - 1) {
-               index = curr + 1;
-             } else if (way.isClosed()) {
-               index = 0;
-             }
+         if (node.tagName) {
+           var output = node.tagName;
 
-             if (index !== -1) {
-               context.enter(modeSelect(context, [way.nodes[index]]).follow(true));
-             }
+           for (var i = 0; i < node.attributes.length; i++) {
+             output += node.attributes[i].name + node.attributes[i].value;
            }
 
-           function nextParent(d3_event) {
-             d3_event.preventDefault();
-             var parents = commonParents();
-             if (!parents || parents.length < 2) return;
-             var index = parents.indexOf(_relatedParent);
-
-             if (index < 0 || index > parents.length - 2) {
-               _relatedParent = parents[0];
-             } else {
-               _relatedParent = parents[index + 1];
-             }
+           for (var _i9 = 0; _i9 < node.childNodes.length; _i9++) {
+             output += xml2str(node.childNodes[_i9]);
+           }
 
-             var surface = context.surface();
-             surface.selectAll('.related').classed('related', false);
+           return output;
+         }
 
-             if (_relatedParent) {
-               surface.selectAll(utilEntitySelector([_relatedParent])).classed('related', true);
-             }
-           }
-         };
+         if (node.nodeName === "#text") {
+           return (node.nodeValue || node.value || "").trim();
+         }
 
-         mode.exit = function () {
-           _newFeature = false;
+         if (node.nodeName === "#cdata-section") {
+           return node.nodeValue;
+         }
 
-           _operations.forEach(function (operation) {
-             if (operation.behavior) {
-               context.uninstall(operation.behavior);
-             }
-           });
+         return "";
+       }
 
-           _operations = [];
+       var geotypes = ["Polygon", "LineString", "Point", "Track", "gx:Track"];
 
-           _behaviors.forEach(context.uninstall);
+       function kmlColor(properties, elem, prefix) {
+         var v = nodeVal(get1(elem, "color")) || "";
+         var colorProp = prefix == "stroke" || prefix === "fill" ? prefix : prefix + "-color";
 
-           select(document).call(keybinding.unbind);
-           context.ui().closeEditMenu();
-           context.history().on('change.select', null).on('undone.select', null).on('redone.select', null);
-           var surface = context.surface();
-           surface.selectAll('.selected-member').classed('selected-member', false);
-           surface.selectAll('.selected').classed('selected', false);
-           surface.selectAll('.highlighted').classed('highlighted', false);
-           surface.selectAll('.related').classed('related', false);
-           context.map().on('drawn.select', null);
-           context.ui().sidebar.hide();
-           context.features().forceVisible([]);
-           var entity = singular();
+         if (v.substr(0, 1) === "#") {
+           v = v.substr(1);
+         }
 
-           if (_newFeature && entity && entity.type === 'relation' && // no tags
-           Object.keys(entity.tags).length === 0 && // no parent relations
-           context.graph().parentRelations(entity).length === 0 && ( // no members or one member with no role
-           entity.members.length === 0 || entity.members.length === 1 && !entity.members[0].role)) {
-             // the user added this relation but didn't edit it at all, so just delete it
-             var deleteAction = actionDeleteRelation(entity.id, true
-             /* don't delete untagged members */
-             );
-             context.perform(deleteAction, _t('operations.delete.annotation.relation'));
-           }
-         };
+         if (v.length === 6 || v.length === 3) {
+           properties[colorProp] = v;
+         } else if (v.length === 8) {
+           properties[prefix + "-opacity"] = parseInt(v.substr(0, 2), 16) / 255;
+           properties[colorProp] = "#" + v.substr(6, 2) + v.substr(4, 2) + v.substr(2, 2);
+         }
+       }
 
-         return mode;
+       function numericProperty(properties, elem, source, target) {
+         var val = parseFloat(nodeVal(get1(elem, source)));
+         if (!isNaN(val)) properties[target] = val;
        }
 
-       function uiLasso(context) {
-         var group, polygon;
-         lasso.coordinates = [];
+       function gxCoords(root) {
+         var elems = root.getElementsByTagName("coord");
+         var coords = [];
+         var times = [];
+         if (elems.length === 0) elems = root.getElementsByTagName("gx:coord");
 
-         function lasso(selection) {
-           context.container().classed('lasso', true);
-           group = selection.append('g').attr('class', 'lasso hide');
-           polygon = group.append('path').attr('class', 'lasso-path');
-           group.call(uiToggle(true));
+         for (var i = 0; i < elems.length; i++) {
+           coords.push(nodeVal(elems[i]).split(" ").map(parseFloat));
          }
 
-         function draw() {
-           if (polygon) {
-             polygon.data([lasso.coordinates]).attr('d', function (d) {
-               return 'M' + d.join(' L') + ' Z';
-             });
-           }
+         var timeElems = root.getElementsByTagName("when");
+
+         for (var j = 0; j < timeElems.length; j++) {
+           times.push(nodeVal(timeElems[j]));
          }
 
-         lasso.extent = function () {
-           return lasso.coordinates.reduce(function (extent, point) {
-             return extent.extend(geoExtent(point));
-           }, geoExtent());
+         return {
+           coords: coords,
+           times: times
          };
+       }
 
-         lasso.p = function (_) {
-           if (!arguments.length) return lasso;
-           lasso.coordinates.push(_);
-           draw();
-           return lasso;
-         };
+       function getGeometry(root) {
+         var geomNode;
+         var geomNodes;
+         var i;
+         var j;
+         var k;
+         var geoms = [];
+         var coordTimes = [];
 
-         lasso.close = function () {
-           if (group) {
-             group.call(uiToggle(false, function () {
-               select(this).remove();
-             }));
-           }
+         if (get1(root, "MultiGeometry")) {
+           return getGeometry(get1(root, "MultiGeometry"));
+         }
 
-           context.container().classed('lasso', false);
-         };
+         if (get1(root, "MultiTrack")) {
+           return getGeometry(get1(root, "MultiTrack"));
+         }
 
-         return lasso;
-       }
+         if (get1(root, "gx:MultiTrack")) {
+           return getGeometry(get1(root, "gx:MultiTrack"));
+         }
 
-       function behaviorLasso(context) {
-         // use pointer events on supported platforms; fallback to mouse events
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+         for (i = 0; i < geotypes.length; i++) {
+           geomNodes = root.getElementsByTagName(geotypes[i]);
 
-         var behavior = function behavior(selection) {
-           var lasso;
+           if (geomNodes) {
+             for (j = 0; j < geomNodes.length; j++) {
+               geomNode = geomNodes[j];
 
-           function pointerdown(d3_event) {
-             var button = 0; // left
+               if (geotypes[i] === "Point") {
+                 geoms.push({
+                   type: "Point",
+                   coordinates: coord1(nodeVal(get1(geomNode, "coordinates")))
+                 });
+               } else if (geotypes[i] === "LineString") {
+                 geoms.push({
+                   type: "LineString",
+                   coordinates: coord(nodeVal(get1(geomNode, "coordinates")))
+                 });
+               } else if (geotypes[i] === "Polygon") {
+                 var rings = geomNode.getElementsByTagName("LinearRing"),
+                     coords = [];
 
-             if (d3_event.button === button && d3_event.shiftKey === true) {
-               lasso = null;
-               select(window).on(_pointerPrefix + 'move.lasso', pointermove).on(_pointerPrefix + 'up.lasso', pointerup);
-               d3_event.stopPropagation();
+                 for (k = 0; k < rings.length; k++) {
+                   coords.push(coord(nodeVal(get1(rings[k], "coordinates"))));
+                 }
+
+                 geoms.push({
+                   type: "Polygon",
+                   coordinates: coords
+                 });
+               } else if (geotypes[i] === "Track" || geotypes[i] === "gx:Track") {
+                 var track = gxCoords(geomNode);
+                 geoms.push({
+                   type: "LineString",
+                   coordinates: track.coords
+                 });
+                 if (track.times.length) coordTimes.push(track.times);
+               }
              }
            }
+         }
 
-           function pointermove() {
-             if (!lasso) {
-               lasso = uiLasso(context);
-               context.surface().call(lasso);
-             }
+         return {
+           geoms: geoms,
+           coordTimes: coordTimes
+         };
+       }
 
-             lasso.p(context.map().mouse());
+       function getPlacemark(root, styleIndex, styleMapIndex, styleByHash) {
+         var geomsAndTimes = getGeometry(root);
+         var i;
+         var properties = {};
+         var name = nodeVal(get1(root, "name"));
+         var address = nodeVal(get1(root, "address"));
+         var styleUrl = nodeVal(get1(root, "styleUrl"));
+         var description = nodeVal(get1(root, "description"));
+         var timeSpan = get1(root, "TimeSpan");
+         var timeStamp = get1(root, "TimeStamp");
+         var extendedData = get1(root, "ExtendedData");
+         var iconStyle = get1(root, "IconStyle");
+         var labelStyle = get1(root, "LabelStyle");
+         var lineStyle = get1(root, "LineStyle");
+         var polyStyle = get1(root, "PolyStyle");
+         var visibility = get1(root, "visibility");
+         if (name) properties.name = name;
+         if (address) properties.address = address;
+
+         if (styleUrl) {
+           if (styleUrl[0] !== "#") {
+             styleUrl = "#" + styleUrl;
            }
 
-           function normalize(a, b) {
-             return [[Math.min(a[0], b[0]), Math.min(a[1], b[1])], [Math.max(a[0], b[0]), Math.max(a[1], b[1])]];
+           properties.styleUrl = styleUrl;
+
+           if (styleIndex[styleUrl]) {
+             properties.styleHash = styleIndex[styleUrl];
            }
 
-           function lassoed() {
-             if (!lasso) return [];
-             var graph = context.graph();
-             var limitToNodes;
+           if (styleMapIndex[styleUrl]) {
+             properties.styleMapHash = styleMapIndex[styleUrl];
+             properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
+           } // Try to populate the lineStyle or polyStyle since we got the style hash
 
-             if (context.map().editableDataEnabled(true
-             /* skipZoomCheck */
-             ) && context.map().isInWideSelection()) {
-               // only select from the visible nodes
-               limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
-             } else if (!context.map().editableDataEnabled()) {
-               return [];
-             }
 
-             var bounds = lasso.extent().map(context.projection.invert);
-             var extent = geoExtent(normalize(bounds[0], bounds[1]));
-             var intersects = context.history().intersects(extent).filter(function (entity) {
-               return entity.type === 'node' && (!limitToNodes || limitToNodes.has(entity)) && geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) && !context.features().isHidden(entity, graph, entity.geometry(graph));
-             }); // sort the lassoed nodes as best we can
+           var style = styleByHash[properties.styleHash];
 
-             intersects.sort(function (node1, node2) {
-               var parents1 = graph.parentWays(node1);
-               var parents2 = graph.parentWays(node2);
+           if (style) {
+             if (!iconStyle) iconStyle = get1(style, "IconStyle");
+             if (!labelStyle) labelStyle = get1(style, "LabelStyle");
+             if (!lineStyle) lineStyle = get1(style, "LineStyle");
+             if (!polyStyle) polyStyle = get1(style, "PolyStyle");
+           }
+         }
 
-               if (parents1.length && parents2.length) {
-                 // both nodes are vertices
-                 var sharedParents = utilArrayIntersection(parents1, parents2);
+         if (description) properties.description = description;
 
-                 if (sharedParents.length) {
-                   var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
+         if (timeSpan) {
+           var begin = nodeVal(get1(timeSpan, "begin"));
+           var end = nodeVal(get1(timeSpan, "end"));
+           properties.timespan = {
+             begin: begin,
+             end: end
+           };
+         }
 
-                   return sharedParentNodes.indexOf(node1.id) - sharedParentNodes.indexOf(node2.id);
-                 } else {
-                   // vertices do not share a way; group them by their respective parent ways
-                   return parseFloat(parents1[0].id.slice(1)) - parseFloat(parents2[0].id.slice(1));
-                 }
-               } else if (parents1.length || parents2.length) {
-                 // only one node is a vertex; sort standalone points before vertices
-                 return parents1.length - parents2.length;
-               } // both nodes are standalone points; sort left to right
+         if (timeStamp) {
+           properties.timestamp = nodeVal(get1(timeStamp, "when"));
+         }
 
+         if (iconStyle) {
+           kmlColor(properties, iconStyle, "icon");
+           numericProperty(properties, iconStyle, "scale", "icon-scale");
+           numericProperty(properties, iconStyle, "heading", "icon-heading");
+           var hotspot = get1(iconStyle, "hotSpot");
 
-               return node1.loc[0] - node2.loc[0];
-             });
-             return intersects.map(function (entity) {
-               return entity.id;
-             });
+           if (hotspot) {
+             var left = parseFloat(hotspot.getAttribute("x"));
+             var top = parseFloat(hotspot.getAttribute("y"));
+             if (!isNaN(left) && !isNaN(top)) properties["icon-offset"] = [left, top];
            }
 
-           function pointerup() {
-             select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
-             if (!lasso) return;
-             var ids = lassoed();
-             lasso.close();
+           var icon = get1(iconStyle, "Icon");
 
-             if (ids.length) {
-               context.enter(modeSelect(context, ids));
-             }
+           if (icon) {
+             var href = nodeVal(get1(icon, "href"));
+             if (href) properties.icon = href;
            }
+         }
 
-           selection.on(_pointerPrefix + 'down.lasso', pointerdown);
-         };
+         if (labelStyle) {
+           kmlColor(properties, labelStyle, "label");
+           numericProperty(properties, labelStyle, "scale", "label-scale");
+         }
 
-         behavior.off = function (selection) {
-           selection.on(_pointerPrefix + 'down.lasso', null);
-         };
+         if (lineStyle) {
+           kmlColor(properties, lineStyle, "stroke");
+           numericProperty(properties, lineStyle, "width", "stroke-width");
+         }
 
-         return behavior;
-       }
+         if (polyStyle) {
+           kmlColor(properties, polyStyle, "fill");
+           var fill = nodeVal(get1(polyStyle, "fill"));
+           var outline = nodeVal(get1(polyStyle, "outline"));
+           if (fill) properties["fill-opacity"] = fill === "1" ? properties["fill-opacity"] || 1 : 0;
+           if (outline) properties["stroke-opacity"] = outline === "1" ? properties["stroke-opacity"] || 1 : 0;
+         }
 
-       function modeBrowse(context) {
-         var mode = {
-           button: 'browse',
-           id: 'browse',
-           title: _t('modes.browse.title'),
-           description: _t('modes.browse.description')
-         };
-         var sidebar;
+         if (extendedData) {
+           var datas = extendedData.getElementsByTagName("Data"),
+               simpleDatas = extendedData.getElementsByTagName("SimpleData");
 
-         var _selectBehavior;
+           for (i = 0; i < datas.length; i++) {
+             properties[datas[i].getAttribute("name")] = nodeVal(get1(datas[i], "value"));
+           }
 
-         var _behaviors = [];
+           for (i = 0; i < simpleDatas.length; i++) {
+             properties[simpleDatas[i].getAttribute("name")] = nodeVal(simpleDatas[i]);
+           }
+         }
 
-         mode.selectBehavior = function (val) {
-           if (!arguments.length) return _selectBehavior;
-           _selectBehavior = val;
-           return mode;
+         if (visibility) {
+           properties.visibility = nodeVal(visibility);
+         }
+
+         if (geomsAndTimes.coordTimes.length) {
+           properties.coordinateProperties = {
+             times: geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes
+           };
+         }
+
+         var feature = {
+           type: "Feature",
+           geometry: geomsAndTimes.geoms.length === 0 ? null : geomsAndTimes.geoms.length === 1 ? geomsAndTimes.geoms[0] : {
+             type: "GeometryCollection",
+             geometries: geomsAndTimes.geoms
+           },
+           properties: properties
          };
+         if (root.getAttribute("id")) feature.id = root.getAttribute("id");
+         return feature;
+       }
 
-         mode.enter = function () {
-           if (!_behaviors.length) {
-             if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
-             _behaviors = [behaviorPaste(context), behaviorHover(context).on('hover', context.ui().sidebar.hover), _selectBehavior, behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
-           }
+       function kmlGen(doc) {
+         var styleIndex, styleByHash, styleMapIndex, placemarks, styles, styleMaps, k, hash, l, pairs, pairsMap, m, j, feature;
+         return regeneratorRuntime.wrap(function kmlGen$(_context3) {
+           while (1) {
+             switch (_context3.prev = _context3.next) {
+               case 0:
+                 // styleindex keeps track of hashed styles in order to match feature
+                 styleIndex = {};
+                 styleByHash = {}; // stylemapindex keeps track of style maps to expose in properties
+
+                 styleMapIndex = {}; // atomic geospatial types supported by KML - MultiGeometry is
+                 // handled separately
+                 // all root placemarks in the file
+
+                 placemarks = doc.getElementsByTagName("Placemark");
+                 styles = doc.getElementsByTagName("Style");
+                 styleMaps = doc.getElementsByTagName("StyleMap");
+
+                 for (k = 0; k < styles.length; k++) {
+                   hash = okhash(xml2str(styles[k])).toString(16);
+                   styleIndex["#" + styles[k].getAttribute("id")] = hash;
+                   styleByHash[hash] = styles[k];
+                 }
 
-           _behaviors.forEach(context.install); // Get focus on the body.
+                 for (l = 0; l < styleMaps.length; l++) {
+                   styleIndex["#" + styleMaps[l].getAttribute("id")] = okhash(xml2str(styleMaps[l])).toString(16);
+                   pairs = styleMaps[l].getElementsByTagName("Pair");
+                   pairsMap = {};
 
+                   for (m = 0; m < pairs.length; m++) {
+                     pairsMap[nodeVal(get1(pairs[m], "key"))] = nodeVal(get1(pairs[m], "styleUrl"));
+                   }
 
-           if (document.activeElement && document.activeElement.blur) {
-             document.activeElement.blur();
-           }
+                   styleMapIndex["#" + styleMaps[l].getAttribute("id")] = pairsMap;
+                 }
 
-           if (sidebar) {
-             context.ui().sidebar.show(sidebar);
-           } else {
-             context.ui().sidebar.select(null);
-           }
-         };
+                 j = 0;
 
-         mode.exit = function () {
-           context.ui().sidebar.hover.cancel();
+               case 9:
+                 if (!(j < placemarks.length)) {
+                   _context3.next = 17;
+                   break;
+                 }
 
-           _behaviors.forEach(context.uninstall);
+                 feature = getPlacemark(placemarks[j], styleIndex, styleMapIndex, styleByHash);
 
-           if (sidebar) {
-             context.ui().sidebar.hide();
+                 if (!feature) {
+                   _context3.next = 14;
+                   break;
+                 }
+
+                 _context3.next = 14;
+                 return feature;
+
+               case 14:
+                 j++;
+                 _context3.next = 9;
+                 break;
+
+               case 17:
+               case "end":
+                 return _context3.stop();
+             }
            }
-         };
+         }, _marked3);
+       }
 
-         mode.sidebar = function (_) {
-           if (!arguments.length) return sidebar;
-           sidebar = _;
-           return mode;
+       function kml(doc) {
+         return {
+           type: "FeatureCollection",
+           features: Array.from(kmlGen(doc))
          };
+       }
 
-         mode.operations = function () {
-           return [operationPaste(context)];
-         };
+       var _initialized = false;
+       var _enabled = false;
 
-         return mode;
-       }
+       var _geojson;
 
-       function behaviorAddWay(context) {
-         var dispatch$1 = dispatch('start', 'startFromWay', 'startFromNode');
-         var draw = behaviorDraw(context);
+       function svgData(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-         function behavior(surface) {
-           draw.on('click', function () {
-             dispatch$1.apply('start', this, arguments);
-           }).on('clickWay', function () {
-             dispatch$1.apply('startFromWay', this, arguments);
-           }).on('clickNode', function () {
-             dispatch$1.apply('startFromNode', this, arguments);
-           }).on('cancel', behavior.cancel).on('finish', behavior.cancel);
-           context.map().dblclickZoomEnable(false);
-           surface.call(draw);
-         }
+         var _showLabels = true;
+         var detected = utilDetect();
+         var layer = select(null);
 
-         behavior.off = function (surface) {
-           surface.call(draw.off);
-         };
+         var _vtService;
 
-         behavior.cancel = function () {
-           window.setTimeout(function () {
-             context.map().dblclickZoomEnable(true);
-           }, 1000);
-           context.enter(modeBrowse(context));
-         };
+         var _fileList;
 
-         return utilRebind(behavior, dispatch$1, 'on');
-       }
+         var _template;
 
-       function behaviorHash(context) {
-         // cached window.location.hash
-         var _cachedHash = null; // allowable latitude range
+         var _src;
 
-         var _latitudeLimit = 90 - 1e-8;
+         function init() {
+           if (_initialized) return; // run once
 
-         function computedHashParameters() {
-           var map = context.map();
-           var center = map.center();
-           var zoom = map.zoom();
-           var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
-           var oldParams = utilObjectOmit(utilStringQs(window.location.hash), ['comment', 'source', 'hashtags', 'walkthrough']);
-           var newParams = {};
-           delete oldParams.id;
-           var selected = context.selectedIDs().filter(function (id) {
-             return context.hasEntity(id);
-           });
+           _geojson = {};
+           _enabled = true;
 
-           if (selected.length) {
-             newParams.id = selected.join(',');
+           function over(d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             d3_event.dataTransfer.dropEffect = 'copy';
            }
 
-           newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
-           return Object.assign(oldParams, newParams);
+           context.container().attr('dropzone', 'copy').on('drop.svgData', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             if (!detected.filedrop) return;
+             drawData.fileList(d3_event.dataTransfer.files);
+           }).on('dragenter.svgData', over).on('dragexit.svgData', over).on('dragover.svgData', over);
+           _initialized = true;
          }
 
-         function computedHash() {
-           return '#' + utilQsString(computedHashParameters(), true);
+         function getService() {
+           if (services.vectorTile && !_vtService) {
+             _vtService = services.vectorTile;
+
+             _vtService.event.on('loadedData', throttledRedraw);
+           } else if (!services.vectorTile && _vtService) {
+             _vtService = null;
+           }
+
+           return _vtService;
          }
 
-         function computedTitle(includeChangeCount) {
-           var baseTitle = context.documentTitleBase() || 'iD';
-           var contextual;
-           var changeCount;
-           var titleID;
-           var selected = context.selectedIDs().filter(function (id) {
-             return context.hasEntity(id);
+         function showLayer() {
+           layerOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');
            });
+         }
 
-           if (selected.length) {
-             var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
+         }
 
-             if (selected.length > 1) {
-               contextual = _t('title.labeled_and_more', {
-                 labeled: firstLabel,
-                 count: selected.length - 1
-               });
-             } else {
-               contextual = firstLabel;
-             }
+         function layerOn() {
+           layer.style('display', 'block');
+         }
 
-             titleID = 'context';
-           }
+         function layerOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         } // ensure that all geojson features in a collection have IDs
 
-           if (includeChangeCount) {
-             changeCount = context.history().difference().summary().length;
 
-             if (changeCount > 0) {
-               titleID = contextual ? 'changes_context' : 'changes';
+         function ensureIDs(gj) {
+           if (!gj) return null;
+
+           if (gj.type === 'FeatureCollection') {
+             for (var i = 0; i < gj.features.length; i++) {
+               ensureFeatureID(gj.features[i]);
              }
+           } else {
+             ensureFeatureID(gj);
            }
 
-           if (titleID) {
-             return _t('title.format.' + titleID, {
-               changes: changeCount,
-               base: baseTitle,
-               context: contextual
-             });
+           return gj;
+         } // ensure that each single Feature object has a unique ID
+
+
+         function ensureFeatureID(feature) {
+           if (!feature) return;
+           feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
+           return feature;
+         } // Prefer an array of Features instead of a FeatureCollection
+
+
+         function getFeatures(gj) {
+           if (!gj) return [];
+
+           if (gj.type === 'FeatureCollection') {
+             return gj.features;
+           } else {
+             return [gj];
            }
+         }
 
-           return baseTitle;
+         function featureKey(d) {
+           return d.__featurehash__;
          }
 
-         function updateTitle(includeChangeCount) {
-           if (!context.setsDocumentTitle()) return;
-           var newTitle = computedTitle(includeChangeCount);
+         function isPolygon(d) {
+           return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+         }
 
-           if (document.title !== newTitle) {
-             document.title = newTitle;
-           }
+         function clipPathID(d) {
+           return 'ideditor-data-' + d.__featurehash__ + '-clippath';
          }
 
-         function updateHashIfNeeded() {
-           if (context.inIntro()) return;
-           var latestHash = computedHash();
+         function featureClasses(d) {
+           return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+         }
 
-           if (_cachedHash !== latestHash) {
-             _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
-             // though unavoidably creating a browser history entry
+         function drawData(selection) {
+           var vtService = getService();
+           var getPath = svgPath(projection).geojson;
+           var getAreaPath = svgPath(projection, null, true).geojson;
+           var hasData = drawData.hasData();
+           layer = selection.selectAll('.layer-mapdata').data(_enabled && hasData ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-mapdata').merge(layer);
+           var surface = context.surface();
+           if (!surface || surface.empty()) return; // not ready to draw yet, starting up
+           // Gather data
 
-             window.history.replaceState(null, computedTitle(false
-             /* includeChangeCount */
-             ), latestHash); // set the title we want displayed for the browser tab/window
+           var geoData, polygonData;
 
-             updateTitle(true
-             /* includeChangeCount */
-             );
+           if (_template && vtService) {
+             // fetch data from vector tile service
+             var sourceID = _template;
+             vtService.loadTiles(sourceID, _template, projection);
+             geoData = vtService.data(sourceID, projection);
+           } else {
+             geoData = getFeatures(_geojson);
            }
-         }
 
-         var _throttledUpdate = throttle(updateHashIfNeeded, 500);
+           geoData = geoData.filter(getPath);
+           polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons
 
-         var _throttledUpdateTitle = throttle(function () {
-           updateTitle(true
-           /* includeChangeCount */
-           );
-         }, 500);
+           var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data').data(polygonData, featureKey);
+           clipPaths.exit().remove();
+           var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-data').attr('id', clipPathID);
+           clipPathsEnter.append('path');
+           clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', getAreaPath); // Draw fill, shadow, stroke layers
 
-         function hashchange() {
-           // ignore spurious hashchange events
-           if (window.location.hash === _cachedHash) return;
-           _cachedHash = window.location.hash;
-           var q = utilStringQs(_cachedHash);
-           var mapArgs = (q.map || '').split('/').map(Number);
+           var datagroups = layer.selectAll('g.datagroup').data(['fill', 'shadow', 'stroke']);
+           datagroups = datagroups.enter().append('g').attr('class', function (d) {
+             return 'datagroup datagroup-' + d;
+           }).merge(datagroups); // Draw paths
 
-           if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
-             // replace bogus hash
-             updateHashIfNeeded();
-           } else {
-             // don't update if the new hash already reflects the state of iD
-             if (_cachedHash === computedHash()) return;
-             var mode = context.mode();
-             context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
+           var pathData = {
+             fill: polygonData,
+             shadow: geoData,
+             stroke: geoData
+           };
+           var paths = datagroups.selectAll('path').data(function (layer) {
+             return pathData[layer];
+           }, featureKey); // exit
 
-             if (q.id && mode) {
-               var ids = q.id.split(',').filter(function (id) {
-                 return context.hasEntity(id);
-               });
+           paths.exit().remove(); // enter/update
 
-               if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
-                 context.enter(modeSelect(context, ids));
-                 return;
-               }
-             }
+           paths = paths.enter().append('path').attr('class', function (d) {
+             var datagroup = this.parentNode.__data__;
+             return 'pathdata ' + datagroup + ' ' + featureClasses(d);
+           }).attr('clip-path', function (d) {
+             var datagroup = this.parentNode.__data__;
+             return datagroup === 'fill' ? 'url(#' + clipPathID(d) + ')' : null;
+           }).merge(paths).attr('d', function (d) {
+             var datagroup = this.parentNode.__data__;
+             return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
+           }); // Draw labels
 
-             var center = context.map().center();
-             var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
-             var maxdist = 500; // Don't allow the hash location to change too much while drawing
-             // This can happen if the user accidentally hit the back button.  #3996
+           layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
 
-             if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
-               context.enter(modeBrowse(context));
-               return;
-             }
+           function drawLabels(selection, textClass, data) {
+             var labelPath = d3_geoPath(projection);
+             var labelData = data.filter(function (d) {
+               return _showLabels && d.properties && (d.properties.desc || d.properties.name);
+             });
+             var labels = selection.selectAll('text.' + textClass).data(labelData, featureKey); // exit
+
+             labels.exit().remove(); // enter/update
+
+             labels = labels.enter().append('text').attr('class', function (d) {
+               return textClass + ' ' + featureClasses(d);
+             }).merge(labels).text(function (d) {
+               return d.properties.desc || d.properties.name;
+             }).attr('x', function (d) {
+               var centroid = labelPath.centroid(d);
+               return centroid[0] + 11;
+             }).attr('y', function (d) {
+               var centroid = labelPath.centroid(d);
+               return centroid[1];
+             });
            }
          }
 
-         function behavior() {
-           context.map().on('move.behaviorHash', _throttledUpdate);
-           context.history().on('change.behaviorHash', _throttledUpdateTitle);
-           context.on('enter.behaviorHash', _throttledUpdate);
-           select(window).on('hashchange.behaviorHash', hashchange);
+         function getExtension(fileName) {
+           if (!fileName) return;
+           var re = /\.(gpx|kml|(geo)?json)$/i;
+           var match = fileName.toLowerCase().match(re);
+           return match && match.length && match[0];
+         }
 
-           if (window.location.hash) {
-             var q = utilStringQs(window.location.hash);
+         function xmlToDom(textdata) {
+           return new DOMParser().parseFromString(textdata, 'text/xml');
+         }
 
-             if (q.id) {
-               //if (!context.history().hasRestorableChanges()) {
-               // targeting specific features: download, select, and zoom to them
-               context.zoomToEntity(q.id.split(',')[0], !q.map); //}
-             }
+         function stringifyGeojsonProperties(feature) {
+           var properties = feature.properties;
 
-             if (q.walkthrough === 'true') {
-               behavior.startWalkthrough = true;
-             }
+           for (var key in properties) {
+             var property = properties[key];
 
-             if (q.map) {
-               behavior.hadHash = true;
+             if (typeof property === 'number' || typeof property === 'boolean' || Array.isArray(property)) {
+               properties[key] = property.toString();
+             } else if (property === null) {
+               properties[key] = 'null';
+             } else if (_typeof(property) === 'object') {
+               properties[key] = JSON.stringify(property);
              }
-
-             hashchange();
-             updateTitle(false);
            }
          }
 
-         behavior.off = function () {
-           _throttledUpdate.cancel();
+         drawData.setFile = function (extension, data) {
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null;
+           var gj;
+
+           switch (extension) {
+             case '.gpx':
+               gj = gpx(xmlToDom(data));
+               break;
+
+             case '.kml':
+               gj = kml(xmlToDom(data));
+               break;
+
+             case '.geojson':
+             case '.json':
+               gj = JSON.parse(data);
+
+               if (gj.type === 'FeatureCollection') {
+                 gj.features.forEach(stringifyGeojsonProperties);
+               } else if (gj.type === 'Feature') {
+                 stringifyGeojsonProperties(gj);
+               }
+
+               break;
+           }
+
+           gj = gj || {};
+
+           if (Object.keys(gj).length) {
+             _geojson = ensureIDs(gj);
+             _src = extension + ' data file';
+             this.fitZoom();
+           }
+
+           dispatch.call('change');
+           return this;
+         };
+
+         drawData.showLabels = function (val) {
+           if (!arguments.length) return _showLabels;
+           _showLabels = val;
+           return this;
+         };
+
+         drawData.enabled = function (val) {
+           if (!arguments.length) return _enabled;
+           _enabled = val;
 
-           _throttledUpdateTitle.cancel();
+           if (_enabled) {
+             showLayer();
+           } else {
+             hideLayer();
+           }
 
-           context.map().on('move.behaviorHash', null);
-           context.on('enter.behaviorHash', null);
-           select(window).on('hashchange.behaviorHash', null);
-           window.location.hash = '';
+           dispatch.call('change');
+           return this;
          };
 
-         return behavior;
-       }
+         drawData.hasData = function () {
+           var gj = _geojson || {};
+           return !!(_template || Object.keys(gj).length);
+         };
 
-       /*
-           iD.coreDifference represents the difference between two graphs.
-           It knows how to calculate the set of entities that were
-           created, modified, or deleted, and also contains the logic
-           for recursively extending a difference to the complete set
-           of entities that will require a redraw, taking into account
-           child and parent relationships.
-        */
+         drawData.template = function (val, src) {
+           if (!arguments.length) return _template; // test source against OSM imagery blocklists..
 
-       function coreDifference(base, head) {
-         var _changes = {};
-         var _didChange = {}; // 'addition', 'deletion', 'geometry', 'properties'
+           var osm = context.connection();
 
-         var _diff = {};
+           if (osm) {
+             var blocklists = osm.imageryBlocklists();
+             var fail = false;
+             var tested = 0;
+             var regex;
 
-         function checkEntityID(id) {
-           var h = head.entities[id];
-           var b = base.entities[id];
-           if (h === b) return;
-           if (_changes[id]) return;
+             for (var i = 0; i < blocklists.length; i++) {
+               regex = blocklists[i];
+               fail = regex.test(val);
+               tested++;
+               if (fail) break;
+             } // ensure at least one test was run.
 
-           if (!h && b) {
-             _changes[id] = {
-               base: b,
-               head: h
-             };
-             _didChange.deletion = true;
-             return;
-           }
 
-           if (h && !b) {
-             _changes[id] = {
-               base: b,
-               head: h
-             };
-             _didChange.addition = true;
-             return;
+             if (!tested) {
+               regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
+               fail = regex.test(val);
+             }
            }
 
-           if (h && b) {
-             if (h.members && b.members && !fastDeepEqual(h.members, b.members)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.geometry = true;
-               _didChange.properties = true;
-               return;
-             }
+           _template = val;
+           _fileList = null;
+           _geojson = null; // strip off the querystring/hash from the template,
+           // it often includes the access token
 
-             if (h.loc && b.loc && !geoVecEqual(h.loc, b.loc)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.geometry = true;
-             }
+           _src = src || 'vectortile:' + val.split(/[?#]/)[0];
+           dispatch.call('change');
+           return this;
+         };
 
-             if (h.nodes && b.nodes && !fastDeepEqual(h.nodes, b.nodes)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.geometry = true;
-             }
+         drawData.geojson = function (gj, src) {
+           if (!arguments.length) return _geojson;
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null;
+           gj = gj || {};
 
-             if (h.tags && b.tags && !fastDeepEqual(h.tags, b.tags)) {
-               _changes[id] = {
-                 base: b,
-                 head: h
-               };
-               _didChange.properties = true;
-             }
+           if (Object.keys(gj).length) {
+             _geojson = ensureIDs(gj);
+             _src = src || 'unknown.geojson';
            }
-         }
-
-         function load() {
-           // HOT CODE: there can be many thousands of downloaded entities, so looping
-           // through them all can become a performance bottleneck. Optimize by
-           // resolving duplicates and using a basic `for` loop
-           var ids = utilArrayUniq(Object.keys(head.entities).concat(Object.keys(base.entities)));
 
-           for (var i = 0; i < ids.length; i++) {
-             checkEntityID(ids[i]);
-           }
-         }
+           dispatch.call('change');
+           return this;
+         };
 
-         load();
+         drawData.fileList = function (fileList) {
+           if (!arguments.length) return _fileList;
+           _template = null;
+           _fileList = fileList;
+           _geojson = null;
+           _src = null;
+           if (!fileList || !fileList.length) return this;
+           var f = fileList[0];
+           var extension = getExtension(f.name);
+           var reader = new FileReader();
 
-         _diff.length = function length() {
-           return Object.keys(_changes).length;
-         };
+           reader.onload = function () {
+             return function (e) {
+               drawData.setFile(extension, e.target.result);
+             };
+           }();
 
-         _diff.changes = function changes() {
-           return _changes;
+           reader.readAsText(f);
+           return this;
          };
 
-         _diff.didChange = _didChange; // pass true to include affected relation members
+         drawData.url = function (url, defaultExtension) {
+           _template = null;
+           _fileList = null;
+           _geojson = null;
+           _src = null; // strip off any querystring/hash from the url before checking extension
 
-         _diff.extantIDs = function extantIDs(includeRelMembers) {
-           var result = new Set();
-           Object.keys(_changes).forEach(function (id) {
-             if (_changes[id].head) {
-               result.add(id);
-             }
+           var testUrl = url.split(/[?#]/)[0];
+           var extension = getExtension(testUrl) || defaultExtension;
 
-             var h = _changes[id].head;
-             var b = _changes[id].base;
-             var entity = h || b;
+           if (extension) {
+             _template = null;
+             d3_text(url).then(function (data) {
+               drawData.setFile(extension, data);
+             })["catch"](function () {
+               /* ignore */
+             });
+           } else {
+             drawData.template(url);
+           }
 
-             if (includeRelMembers && entity.type === 'relation') {
-               var mh = h ? h.members.map(function (m) {
-                 return m.id;
-               }) : [];
-               var mb = b ? b.members.map(function (m) {
-                 return m.id;
-               }) : [];
-               utilArrayUnion(mh, mb).forEach(function (memberID) {
-                 if (head.hasEntity(memberID)) {
-                   result.add(memberID);
-                 }
-               });
-             }
-           });
-           return Array.from(result);
+           return this;
          };
 
-         _diff.modified = function modified() {
-           var result = [];
-           Object.values(_changes).forEach(function (change) {
-             if (change.base && change.head) {
-               result.push(change.head);
-             }
-           });
-           return result;
+         drawData.getSrc = function () {
+           return _src || '';
          };
 
-         _diff.created = function created() {
-           var result = [];
-           Object.values(_changes).forEach(function (change) {
-             if (!change.base && change.head) {
-               result.push(change.head);
-             }
-           });
-           return result;
-         };
+         drawData.fitZoom = function () {
+           var features = getFeatures(_geojson);
+           if (!features.length) return;
+           var map = context.map();
+           var viewport = map.trimmedExtent().polygon();
+           var coords = features.reduce(function (coords, feature) {
+             var geom = feature.geometry;
+             if (!geom) return coords;
+             var c = geom.coordinates;
+             /* eslint-disable no-fallthrough */
 
-         _diff.deleted = function deleted() {
-           var result = [];
-           Object.values(_changes).forEach(function (change) {
-             if (change.base && !change.head) {
-               result.push(change.base);
-             }
-           });
-           return result;
-         };
+             switch (geom.type) {
+               case 'Point':
+                 c = [c];
 
-         _diff.summary = function summary() {
-           var relevant = {};
-           var keys = Object.keys(_changes);
+               case 'MultiPoint':
+               case 'LineString':
+                 break;
 
-           for (var i = 0; i < keys.length; i++) {
-             var change = _changes[keys[i]];
+               case 'MultiPolygon':
+                 c = utilArrayFlatten(c);
 
-             if (change.head && change.head.geometry(head) !== 'vertex') {
-               addEntity(change.head, head, change.base ? 'modified' : 'created');
-             } else if (change.base && change.base.geometry(base) !== 'vertex') {
-               addEntity(change.base, base, 'deleted');
-             } else if (change.base && change.head) {
-               // modified vertex
-               var moved = !fastDeepEqual(change.base.loc, change.head.loc);
-               var retagged = !fastDeepEqual(change.base.tags, change.head.tags);
+               case 'Polygon':
+               case 'MultiLineString':
+                 c = utilArrayFlatten(c);
+                 break;
+             }
+             /* eslint-enable no-fallthrough */
 
-               if (moved) {
-                 addParents(change.head);
-               }
 
-               if (retagged || moved && change.head.hasInterestingTags()) {
-                 addEntity(change.head, head, 'modified');
-               }
-             } else if (change.head && change.head.hasInterestingTags()) {
-               // created vertex
-               addEntity(change.head, head, 'created');
-             } else if (change.base && change.base.hasInterestingTags()) {
-               // deleted vertex
-               addEntity(change.base, base, 'deleted');
-             }
+             return utilArrayUnion(coords, c);
+           }, []);
+
+           if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
+             var extent = geoExtent(d3_geoBounds({
+               type: 'LineString',
+               coordinates: coords
+             }));
+             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
            }
 
-           return Object.values(relevant);
+           return this;
+         };
 
-           function addEntity(entity, graph, changeType) {
-             relevant[entity.id] = {
-               entity: entity,
-               graph: graph,
-               changeType: changeType
-             };
+         init();
+         return drawData;
+       }
+
+       function svgDebug(projection, context) {
+         function drawDebug(selection) {
+           var showTile = context.getDebug('tile');
+           var showCollision = context.getDebug('collision');
+           var showImagery = context.getDebug('imagery');
+           var showTouchTargets = context.getDebug('target');
+           var showDownloaded = context.getDebug('downloaded');
+           var debugData = [];
+
+           if (showTile) {
+             debugData.push({
+               "class": 'red',
+               label: 'tile'
+             });
            }
 
-           function addParents(entity) {
-             var parents = head.parentWays(entity);
+           if (showCollision) {
+             debugData.push({
+               "class": 'yellow',
+               label: 'collision'
+             });
+           }
 
-             for (var j = parents.length - 1; j >= 0; j--) {
-               var parent = parents[j];
+           if (showImagery) {
+             debugData.push({
+               "class": 'orange',
+               label: 'imagery'
+             });
+           }
 
-               if (!(parent.id in relevant)) {
-                 addEntity(parent, head, 'modified');
-               }
-             }
+           if (showTouchTargets) {
+             debugData.push({
+               "class": 'pink',
+               label: 'touchTargets'
+             });
            }
-         }; // returns complete set of entities that require a redraw
-         //  (optionally within given `extent`)
 
+           if (showDownloaded) {
+             debugData.push({
+               "class": 'purple',
+               label: 'downloaded'
+             });
+           }
 
-         _diff.complete = function complete(extent) {
-           var result = {};
-           var id, change;
+           var legend = context.container().select('.main-content').selectAll('.debug-legend').data(debugData.length ? [0] : []);
+           legend.exit().remove();
+           legend = legend.enter().append('div').attr('class', 'fillD debug-legend').merge(legend);
+           var legendItems = legend.selectAll('.debug-legend-item').data(debugData, function (d) {
+             return d.label;
+           });
+           legendItems.exit().remove();
+           legendItems.enter().append('span').attr('class', function (d) {
+             return "debug-legend-item ".concat(d["class"]);
+           }).text(function (d) {
+             return d.label;
+           });
+           var layer = selection.selectAll('.layer-debug').data(showImagery || showDownloaded ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-debug').merge(layer); // imagery
 
-           for (id in _changes) {
-             change = _changes[id];
-             var h = change.head;
-             var b = change.base;
-             var entity = h || b;
-             var i;
-             if (extent && (!h || !h.intersects(extent, head)) && (!b || !b.intersects(extent, base))) continue;
-             result[id] = h;
+           var extent = context.map().extent();
+           _mainFileFetcher.get('imagery').then(function (d) {
+             var hits = showImagery && d.query.bbox(extent.rectangle(), true) || [];
+             var features = hits.map(function (d) {
+               return d.features[d.id];
+             });
+             var imagery = layer.selectAll('path.debug-imagery').data(features);
+             imagery.exit().remove();
+             imagery.enter().append('path').attr('class', 'debug-imagery debug orange');
+           })["catch"](function () {
+             /* ignore */
+           }); // downloaded
 
-             if (entity.type === 'way') {
-               var nh = h ? h.nodes : [];
-               var nb = b ? b.nodes : [];
-               var diff;
-               diff = utilArrayDifference(nh, nb);
+           var osm = context.connection();
+           var dataDownloaded = [];
 
-               for (i = 0; i < diff.length; i++) {
-                 result[diff[i]] = head.hasEntity(diff[i]);
-               }
+           if (osm && showDownloaded) {
+             var rtree = osm.caches('get').tile.rtree;
+             dataDownloaded = rtree.all().map(function (bbox) {
+               return {
+                 type: 'Feature',
+                 properties: {
+                   id: bbox.id
+                 },
+                 geometry: {
+                   type: 'Polygon',
+                   coordinates: [[[bbox.minX, bbox.minY], [bbox.minX, bbox.maxY], [bbox.maxX, bbox.maxY], [bbox.maxX, bbox.minY], [bbox.minX, bbox.minY]]]
+                 }
+               };
+             });
+           }
 
-               diff = utilArrayDifference(nb, nh);
+           var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
+           downloaded.exit().remove();
+           downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
 
-               for (i = 0; i < diff.length; i++) {
-                 result[diff[i]] = head.hasEntity(diff[i]);
-               }
-             }
+           layer.selectAll('path').attr('d', svgPath(projection).geojson);
+         } // This looks strange because `enabled` methods on other layers are
+         // chainable getter/setters, and this one is just a getter.
 
-             if (entity.type === 'relation' && entity.isMultipolygon()) {
-               var mh = h ? h.members.map(function (m) {
-                 return m.id;
-               }) : [];
-               var mb = b ? b.members.map(function (m) {
-                 return m.id;
-               }) : [];
-               var ids = utilArrayUnion(mh, mb);
 
-               for (i = 0; i < ids.length; i++) {
-                 var member = head.hasEntity(ids[i]);
-                 if (!member) continue; // not downloaded
+         drawDebug.enabled = function () {
+           if (!arguments.length) {
+             return context.getDebug('tile') || context.getDebug('collision') || context.getDebug('imagery') || context.getDebug('target') || context.getDebug('downloaded');
+           } else {
+             return this;
+           }
+         };
 
-                 if (extent && !member.intersects(extent, head)) continue; // not visible
+         return drawDebug;
+       }
 
-                 result[ids[i]] = member;
-               }
-             }
+       /*
+           A standalone SVG element that contains only a `defs` sub-element. To be
+           used once globally, since defs IDs must be unique within a document.
+       */
 
-             addParents(head.parentWays(entity), result);
-             addParents(head.parentRelations(entity), result);
-           }
+       function svgDefs(context) {
+         var _defsSelection = select(null);
 
-           return result;
+         var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
 
-           function addParents(parents, result) {
-             for (var i = 0; i < parents.length; i++) {
-               var parent = parents[i];
-               if (parent.id in result) continue;
-               result[parent.id] = parent;
-               addParents(head.parentRelations(parent), result);
-             }
-           }
-         };
+         function drawDefs(selection) {
+           _defsSelection = selection.append('defs'); // add markers
 
-         return _diff;
-       }
+           _defsSelection.append('marker').attr('id', 'ideditor-oneway-marker').attr('viewBox', '0 0 10 5').attr('refX', 2.5).attr('refY', 2.5).attr('markerWidth', 2).attr('markerHeight', 2).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'oneway-marker-path').attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z').attr('stroke', 'none').attr('fill', '#000').attr('opacity', '0.75'); // SVG markers have to be given a colour where they're defined
+           // (they can't inherit it from the line they're attached to),
+           // so we need to manually define markers for each color of tag
+           // (also, it's slightly nicer if we can control the
+           // positioning for different tags)
 
-       function coreTree(head) {
-         // tree for entities
-         var _rtree = new RBush();
 
-         var _bboxes = {}; // maintain a separate tree for granular way segments
+           function addSidedMarker(name, color, offset) {
+             _defsSelection.append('marker').attr('id', 'ideditor-sided-marker-' + name).attr('viewBox', '0 0 2 2').attr('refX', 1).attr('refY', -offset).attr('markerWidth', 1.5).attr('markerHeight', 1.5).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'sided-marker-path sided-marker-' + name + '-path').attr('d', 'M 0,0 L 1,1 L 2,0 z').attr('stroke', 'none').attr('fill', color);
+           }
 
-         var _segmentsRTree = new RBush();
+           addSidedMarker('natural', 'rgb(170, 170, 170)', 0); // for a coastline, the arrows are (somewhat unintuitively) on
+           // the water side, so let's color them blue (with a gap) to
+           // give a stronger indication
 
-         var _segmentsBBoxes = {};
-         var _segmentsByWayId = {};
-         var tree = {};
+           addSidedMarker('coastline', '#77dede', 1);
+           addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
+           // from the line visually suits that
 
-         function entityBBox(entity) {
-           var bbox = entity.extent(head).bbox();
-           bbox.id = entity.id;
-           _bboxes[entity.id] = bbox;
-           return bbox;
-         }
+           addSidedMarker('barrier', '#ddd', 1);
+           addSidedMarker('man_made', '#fff', 0);
 
-         function segmentBBox(segment) {
-           var extent = segment.extent(head); // extent can be null if the node entities aren't in the graph for some reason
+           _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', '#333').attr('fill-opacity', '0.75').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75');
 
-           if (!extent) return null;
-           var bbox = extent.bbox();
-           bbox.segment = segment;
-           _segmentsBBoxes[segment.id] = bbox;
-           return bbox;
-         }
+           _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker-wireframe').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', 'none').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75'); // add patterns
 
-         function removeEntity(entity) {
-           _rtree.remove(_bboxes[entity.id]);
 
-           delete _bboxes[entity.id];
+           var patterns = _defsSelection.selectAll('pattern').data([// pattern name, pattern image name
+           ['beach', 'dots'], ['construction', 'construction'], ['cemetery', 'cemetery'], ['cemetery_christian', 'cemetery_christian'], ['cemetery_buddhist', 'cemetery_buddhist'], ['cemetery_muslim', 'cemetery_muslim'], ['cemetery_jewish', 'cemetery_jewish'], ['farmland', 'farmland'], ['farmyard', 'farmyard'], ['forest', 'forest'], ['forest_broadleaved', 'forest_broadleaved'], ['forest_needleleaved', 'forest_needleleaved'], ['forest_leafless', 'forest_leafless'], ['golf_green', 'grass'], ['grass', 'grass'], ['landfill', 'landfill'], ['meadow', 'grass'], ['orchard', 'orchard'], ['pond', 'pond'], ['quarry', 'quarry'], ['scrub', 'bushes'], ['vineyard', 'vineyard'], ['water_standing', 'lines'], ['waves', 'waves'], ['wetland', 'wetland'], ['wetland_marsh', 'wetland_marsh'], ['wetland_swamp', 'wetland_swamp'], ['wetland_bog', 'wetland_bog'], ['wetland_reedbed', 'wetland_reedbed']]).enter().append('pattern').attr('id', function (d) {
+             return 'ideditor-pattern-' + d[0];
+           }).attr('width', 32).attr('height', 32).attr('patternUnits', 'userSpaceOnUse');
 
-           if (_segmentsByWayId[entity.id]) {
-             _segmentsByWayId[entity.id].forEach(function (segment) {
-               _segmentsRTree.remove(_segmentsBBoxes[segment.id]);
+           patterns.append('rect').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('class', function (d) {
+             return 'pattern-color-' + d[0];
+           });
+           patterns.append('image').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('xlink:href', function (d) {
+             return context.imagePath('pattern/' + d[1] + '.png');
+           }); // add clip paths
 
-               delete _segmentsBBoxes[segment.id];
-             });
+           _defsSelection.selectAll('clipPath').data([12, 18, 20, 32, 45]).enter().append('clipPath').attr('id', function (d) {
+             return 'ideditor-clip-square-' + d;
+           }).append('rect').attr('x', 0).attr('y', 0).attr('width', function (d) {
+             return d;
+           }).attr('height', function (d) {
+             return d;
+           }); // add symbol spritesheets
 
-             delete _segmentsByWayId[entity.id];
-           }
+
+           addSprites(_spritesheetIds, true);
          }
 
-         function loadEntities(entities) {
-           _rtree.load(entities.map(entityBBox));
+         function addSprites(ids, overrideColors) {
+           _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
 
-           var segments = [];
-           entities.forEach(function (entity) {
-             if (entity.segments) {
-               var entitySegments = entity.segments(head); // cache these to make them easy to remove later
+           var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
 
-               _segmentsByWayId[entity.id] = entitySegments;
-               segments = segments.concat(entitySegments);
-             }
+           spritesheets.enter().append('g').attr('class', function (d) {
+             return 'spritesheet spritesheet-' + d;
+           }).each(function (d) {
+             var url = context.imagePath(d + '.svg');
+             var node = select(this).node();
+             svg(url).then(function (svg) {
+               node.appendChild(select(svg.documentElement).attr('id', 'ideditor-' + d).node());
+
+               if (overrideColors && d !== 'iD-sprite') {
+                 // allow icon colors to be overridden..
+                 select(node).selectAll('path').attr('fill', 'currentColor');
+               }
+             })["catch"](function () {
+               /* ignore */
+             });
            });
-           if (segments.length) _segmentsRTree.load(segments.map(segmentBBox).filter(Boolean));
+           spritesheets.exit().remove();
          }
 
-         function updateParents(entity, insertions, memo) {
-           head.parentWays(entity).forEach(function (way) {
-             if (_bboxes[way.id]) {
-               removeEntity(way);
-               insertions[way.id] = way;
-             }
+         drawDefs.addSprites = addSprites;
+         return drawDefs;
+       }
 
-             updateParents(way, insertions, memo);
-           });
-           head.parentRelations(entity).forEach(function (relation) {
-             if (memo[entity.id]) return;
-             memo[entity.id] = true;
+       var _layerEnabled$2 = false;
 
-             if (_bboxes[relation.id]) {
-               removeEntity(relation);
-               insertions[relation.id] = relation;
-             }
+       var _qaService$2;
 
-             updateParents(relation, insertions, memo);
-           });
-         }
+       function svgKeepRight(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);
 
-         tree.rebase = function (entities, force) {
-           var insertions = {};
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             if (!entity.visible) continue;
+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-4, -24)').attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
+         } // Loosely-coupled keepRight service for fetching issues.
 
-             if (head.entities.hasOwnProperty(entity.id) || _bboxes[entity.id]) {
-               if (!force) {
-                 continue;
-               } else if (_bboxes[entity.id]) {
-                 removeEntity(entity);
-               }
-             }
 
-             insertions[entity.id] = entity;
-             updateParents(entity, insertions, {});
+         function getService() {
+           if (services.keepRight && !_qaService$2) {
+             _qaService$2 = services.keepRight;
+
+             _qaService$2.on('loaded', throttledRedraw);
+           } else if (!services.keepRight && _qaService$2) {
+             _qaService$2 = null;
            }
 
-           loadEntities(Object.values(insertions));
-           return tree;
-         };
+           return _qaService$2;
+         } // Show the markers
 
-         function updateToGraph(graph) {
-           if (graph === head) return;
-           var diff = coreDifference(head, graph);
-           head = graph;
-           var changed = diff.didChange;
-           if (!changed.addition && !changed.deletion && !changed.geometry) return;
-           var insertions = {};
 
-           if (changed.deletion) {
-             diff.deleted().forEach(function (entity) {
-               removeEntity(entity);
-             });
+         function editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
            }
+         } // Immediately remove the markers and their touch targets
 
-           if (changed.geometry) {
-             diff.modified().forEach(function (entity) {
-               removeEntity(entity);
-               insertions[entity.id] = entity;
-               updateParents(entity, insertions, {});
-             });
-           }
 
-           if (changed.addition) {
-             diff.created().forEach(function (entity) {
-               insertions[entity.id] = entity;
-             });
+         function editOff() {
+           if (layerVisible) {
+             layerVisible = false;
+             drawLayer.style('display', 'none');
+             drawLayer.selectAll('.qaItem.keepRight').remove();
+             touchLayer.selectAll('.qaItem.keepRight').remove();
            }
-
-           loadEntities(Object.values(insertions));
-         } // returns an array of entities with bounding boxes overlapping `extent` for the given `graph`
+         } // Enable the layer.  This shows the markers and transitions them to visible.
 
 
-         tree.intersects = function (extent, graph) {
-           updateToGraph(graph);
-           return _rtree.search(extent.bbox()).map(function (bbox) {
-             return graph.entity(bbox.id);
+         function layerOn() {
+           editOn();
+           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             return dispatch.call('change');
            });
-         }; // returns an array of segment objects with bounding boxes overlapping `extent` for the given `graph`
+         } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
 
-         tree.waySegments = function (extent, graph) {
-           updateToGraph(graph);
-           return _segmentsRTree.search(extent.bbox()).map(function (bbox) {
-             return bbox.segment;
+         function layerOff() {
+           throttledRedraw.cancel();
+           drawLayer.interrupt();
+           touchLayer.selectAll('.qaItem.keepRight').remove();
+           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             editOff();
+             dispatch.call('change');
            });
-         };
-
-         return tree;
-       }
+         } // Update the issue markers
 
-       function uiModal(selection, blocking) {
-         var _this = this;
 
-         var keybinding = utilKeybinding('modal');
-         var previous = selection.select('div.modal');
-         var animate = previous.empty();
-         previous.transition().duration(200).style('opacity', 0).remove();
-         var shaded = selection.append('div').attr('class', 'shaded').style('opacity', 0);
+         function updateMarkers() {
+           if (!layerVisible || !_layerEnabled$2) return;
+           var service = getService();
+           var selectedID = context.selectedErrorID();
+           var data = service ? service.getItems(projection) : [];
+           var getTransform = svgPointTransform(projection); // Draw markers..
 
-         shaded.close = function () {
-           shaded.transition().duration(200).style('opacity', 0).remove();
-           modal.transition().duration(200).style('top', '0px');
-           select(document).call(keybinding.unbind);
-         };
+           var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-         var modal = shaded.append('div').attr('class', 'modal fillL');
-         modal.append('input').attr('class', 'keytrap keytrap-first').on('focus.keytrap', moveFocusToLast);
+           markers.exit().remove(); // enter
 
-         if (!blocking) {
-           shaded.on('click.remove-modal', function (d3_event) {
-             if (d3_event.target === _this) {
-               shaded.close();
-             }
+           var markersEnter = markers.enter().append('g').attr('class', function (d) {
+             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
            });
-           modal.append('button').attr('class', 'close').on('click', shaded.close).call(svgIcon('#iD-icon-close'));
-           keybinding.on('⌫', shaded.close).on('⎋', shaded.close);
-           select(document).call(keybinding);
-         }
-
-         modal.append('div').attr('class', 'content');
-         modal.append('input').attr('class', 'keytrap keytrap-last').on('focus.keytrap', moveFocusToFirst);
-
-         if (animate) {
-           shaded.transition().style('opacity', 1);
-         } else {
-           shaded.style('opacity', 1);
-         }
+           markersEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+           markersEnter.append('path').call(markerPath, 'shadow');
+           markersEnter.append('use').attr('class', 'qaItem-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-bolt'); // update
 
-         return shaded;
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
-         function moveFocusToFirst() {
-           var node = modal // there are additional rules about what's focusable, but this suits our purposes
-           .select('a, button, input:not(.keytrap), select, textarea').node();
+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var targets = touchLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-           if (node) {
-             node.focus();
-           } else {
-             select(this).node().blur();
-           }
-         }
+           targets.exit().remove(); // enter/update
 
-         function moveFocusToLast() {
-           var nodes = modal.selectAll('a, button, input:not(.keytrap), select, textarea').nodes();
+           targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+           }).attr('transform', getTransform);
 
-           if (nodes.length) {
-             nodes[nodes.length - 1].focus();
-           } else {
-             select(this).node().blur();
+           function sortY(a, b) {
+             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : a.severity === 'error' && b.severity !== 'error' ? 1 : b.severity === 'error' && a.severity !== 'error' ? -1 : b.loc[1] - a.loc[1];
            }
-         }
-       }
+         } // Draw the keepRight layer and schedule loading issues and updating markers.
 
-       function uiLoading(context) {
-         var _modalSelection = select(null);
 
-         var _message = '';
-         var _blocking = false;
+         function drawKeepRight(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-         var loading = function loading(selection) {
-           _modalSelection = uiModal(selection, _blocking);
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
-           var loadertext = _modalSelection.select('.content').classed('loading-modal', true).append('div').attr('class', 'modal-section fillL');
+           drawLayer = selection.selectAll('.layer-keepRight').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-keepRight').style('display', _layerEnabled$2 ? 'block' : 'none').merge(drawLayer);
 
-           loadertext.append('img').attr('class', 'loader').attr('src', context.imagePath('loader-white.gif'));
-           loadertext.append('h3').html(_message);
+           if (_layerEnabled$2) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }
+           }
+         } // Toggles the layer on and off
 
-           _modalSelection.select('button.close').attr('class', 'hide');
 
-           return loading;
-         };
+         drawKeepRight.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled$2;
+           _layerEnabled$2 = val;
 
-         loading.message = function (val) {
-           if (!arguments.length) return _message;
-           _message = val;
-           return loading;
-         };
+           if (_layerEnabled$2) {
+             layerOn();
+           } else {
+             layerOff();
 
-         loading.blocking = function (val) {
-           if (!arguments.length) return _blocking;
-           _blocking = val;
-           return loading;
-         };
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
+             }
+           }
 
-         loading.close = function () {
-           _modalSelection.remove();
+           dispatch.call('change');
+           return this;
          };
 
-         loading.isShown = function () {
-           return _modalSelection && !_modalSelection.empty() && _modalSelection.node().parentNode;
+         drawKeepRight.supported = function () {
+           return !!getService();
          };
 
-         return loading;
+         return drawKeepRight;
        }
 
-       function coreHistory(context) {
-         var dispatch$1 = dispatch('reset', 'change', 'merge', 'restore', 'undone', 'redone');
-
-         var _lock = utilSessionMutex('lock'); // restorable if iD not open in another window/tab and a saved history exists in localStorage
-
-
-         var _hasUnresolvedRestorableChanges = _lock.lock() && !!corePreferences(getKey('saved_history'));
+       function svgGeolocate(projection) {
+         var layer = select(null);
 
-         var duration = 150;
-         var _imageryUsed = [];
-         var _photoOverlaysUsed = [];
-         var _checkpoints = {};
+         var _position;
 
-         var _pausedGraph;
+         function init() {
+           if (svgGeolocate.initialized) return; // run once
 
-         var _stack;
+           svgGeolocate.enabled = false;
+           svgGeolocate.initialized = true;
+         }
 
-         var _index;
+         function showLayer() {
+           layer.style('display', 'block');
+         }
 
-         var _tree; // internal _act, accepts list of actions and eased time
+         function hideLayer() {
+           layer.transition().duration(250).style('opacity', 0);
+         }
 
+         function layerOn() {
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
+         }
 
-         function _act(actions, t) {
-           actions = Array.prototype.slice.call(actions);
-           var annotation;
+         function layerOff() {
+           layer.style('display', 'none');
+         }
 
-           if (typeof actions[actions.length - 1] !== 'function') {
-             annotation = actions.pop();
-           }
+         function transform(d) {
+           return svgPointTransform(projection)(d);
+         }
 
-           var graph = _stack[_index].graph;
+         function accuracy(accuracy, loc) {
+           // converts accuracy to pixels...
+           var degreesRadius = geoMetersToLat(accuracy),
+               tangentLoc = [loc[0], loc[1] + degreesRadius],
+               projectedTangent = projection(tangentLoc),
+               projectedLoc = projection([loc[0], loc[1]]); // southern most point will have higher pixel value...
 
-           for (var i = 0; i < actions.length; i++) {
-             graph = actions[i](graph, t);
-           }
+           return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
+         }
 
-           return {
-             graph: graph,
-             annotation: annotation,
-             imageryUsed: _imageryUsed,
-             photoOverlaysUsed: _photoOverlaysUsed,
-             transform: context.projection.transform(),
-             selectedIDs: context.selectedIDs()
+         function update() {
+           var geolocation = {
+             loc: [_position.coords.longitude, _position.coords.latitude]
            };
-         } // internal _perform with eased time
-
-
-         function _perform(args, t) {
-           var previous = _stack[_index].graph;
-           _stack = _stack.slice(0, _index + 1);
-
-           var actionResult = _act(args, t);
-
-           _stack.push(actionResult);
+           var groups = layer.selectAll('.geolocations').selectAll('.geolocation').data([geolocation]);
+           groups.exit().remove();
+           var pointsEnter = groups.enter().append('g').attr('class', 'geolocation');
+           pointsEnter.append('circle').attr('class', 'geolocate-radius').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('fill-opacity', '0.3').attr('r', '0');
+           pointsEnter.append('circle').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('stroke', 'white').attr('stroke-width', '1.5').attr('r', '6');
+           groups.merge(pointsEnter).attr('transform', transform);
+           layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
+         }
 
-           _index++;
-           return change(previous);
-         } // internal _replace with eased time
+         function drawLocation(selection) {
+           var enabled = svgGeolocate.enabled;
+           layer = selection.selectAll('.layer-geolocate').data([0]);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-geolocate').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'geolocations');
+           layer = layerEnter.merge(layer);
 
+           if (enabled) {
+             update();
+           } else {
+             layerOff();
+           }
+         }
 
-         function _replace(args, t) {
-           var previous = _stack[_index].graph; // assert(_index == _stack.length - 1)
+         drawLocation.enabled = function (position, enabled) {
+           if (!arguments.length) return svgGeolocate.enabled;
+           _position = position;
+           svgGeolocate.enabled = enabled;
 
-           var actionResult = _act(args, t);
+           if (svgGeolocate.enabled) {
+             showLayer();
+             layerOn();
+           } else {
+             hideLayer();
+           }
 
-           _stack[_index] = actionResult;
-           return change(previous);
-         } // internal _overwrite with eased time
+           return this;
+         };
 
+         init();
+         return drawLocation;
+       }
 
-         function _overwrite(args, t) {
-           var previous = _stack[_index].graph;
+       function svgLabels(projection, context) {
+         var path = d3_geoPath(projection);
+         var detected = utilDetect();
+         var baselineHack = detected.ie || detected.browser.toLowerCase() === 'edge' || detected.browser.toLowerCase() === 'firefox' && detected.version >= 70;
 
-           if (_index > 0) {
-             _index--;
+         var _rdrawn = new RBush();
 
-             _stack.pop();
-           }
+         var _rskipped = new RBush();
 
-           _stack = _stack.slice(0, _index + 1);
+         var _textWidthCache = {};
+         var _entitybboxes = {}; // Listed from highest to lowest priority
 
-           var actionResult = _act(args, t);
+         var labelStack = [['line', 'aeroway', '*', 12], ['line', 'highway', 'motorway', 12], ['line', 'highway', 'trunk', 12], ['line', 'highway', 'primary', 12], ['line', 'highway', 'secondary', 12], ['line', 'highway', 'tertiary', 12], ['line', 'highway', '*', 12], ['line', 'railway', '*', 12], ['line', 'waterway', '*', 12], ['area', 'aeroway', '*', 12], ['area', 'amenity', '*', 12], ['area', 'building', '*', 12], ['area', 'historic', '*', 12], ['area', 'leisure', '*', 12], ['area', 'man_made', '*', 12], ['area', 'natural', '*', 12], ['area', 'shop', '*', 12], ['area', 'tourism', '*', 12], ['area', 'camp_site', '*', 12], ['point', 'aeroway', '*', 10], ['point', 'amenity', '*', 10], ['point', 'building', '*', 10], ['point', 'historic', '*', 10], ['point', 'leisure', '*', 10], ['point', 'man_made', '*', 10], ['point', 'natural', '*', 10], ['point', 'shop', '*', 10], ['point', 'tourism', '*', 10], ['point', 'camp_site', '*', 10], ['line', 'name', '*', 12], ['area', 'name', '*', 12], ['point', 'name', '*', 10]];
 
-           _stack.push(actionResult);
+         function shouldSkipIcon(preset) {
+           var noIcons = ['building', 'landuse', 'natural'];
+           return noIcons.some(function (s) {
+             return preset.id.indexOf(s) >= 0;
+           });
+         }
 
-           _index++;
-           return change(previous);
-         } // determine difference and dispatch a change event
+         function get(array, prop) {
+           return function (d, i) {
+             return array[i][prop];
+           };
+         }
 
+         function textWidth(text, size, elem) {
+           var c = _textWidthCache[size];
+           if (!c) c = _textWidthCache[size] = {};
 
-         function change(previous) {
-           var difference = coreDifference(previous, history.graph());
+           if (c[text]) {
+             return c[text];
+           } else if (elem) {
+             c[text] = elem.getComputedTextLength();
+             return c[text];
+           } else {
+             var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
 
-           if (!_pausedGraph) {
-             dispatch$1.call('change', this, difference);
+             if (str === null) {
+               return size / 3 * 2 * text.length;
+             } else {
+               return size / 3 * (2 * text.length + str.length);
+             }
            }
-
-           return difference;
-         } // iD uses namespaced keys so multiple installations do not conflict
-
-
-         function getKey(n) {
-           return 'iD_' + window.location.origin + '_' + n;
          }
 
-         var history = {
-           graph: function graph() {
-             return _stack[_index].graph;
-           },
-           tree: function tree() {
-             return _tree;
-           },
-           base: function base() {
-             return _stack[0].graph;
-           },
-           merge: function merge(entities
-           /*, extent*/
-           ) {
-             var stack = _stack.map(function (state) {
-               return state.graph;
-             });
+         function drawLinePaths(selection, entities, filter, classes, labels) {
+           var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
 
-             _stack[0].graph.rebase(entities, stack, false);
+           paths.exit().remove(); // enter/update
 
-             _tree.rebase(entities, false);
+           paths.enter().append('path').style('stroke-width', get(labels, 'font-size')).attr('id', function (d) {
+             return 'ideditor-labelpath-' + d.id;
+           }).attr('class', classes).merge(paths).attr('d', get(labels, 'lineString'));
+         }
 
-             dispatch$1.call('merge', this, entities);
-           },
-           perform: function perform() {
-             // complete any transition already in progress
-             select(document).interrupt('history.perform');
-             var transitionable = false;
-             var action0 = arguments[0];
+         function drawLineLabels(selection, entities, filter, classes, labels) {
+           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-             if (arguments.length === 1 || arguments.length === 2 && typeof arguments[1] !== 'function') {
-               transitionable = !!action0.transitionable;
-             }
+           texts.exit().remove(); // enter
 
-             if (transitionable) {
-               var origArguments = arguments;
-               select(document).transition('history.perform').duration(duration).ease(linear$1).tween('history.tween', function () {
-                 return function (t) {
-                   if (t < 1) _overwrite([action0], t);
-                 };
-               }).on('start', function () {
-                 _perform([action0], 0);
-               }).on('end interrupt', function () {
-                 _overwrite(origArguments, 1);
-               });
-             } else {
-               return _perform(arguments);
-             }
-           },
-           replace: function replace() {
-             select(document).interrupt('history.perform');
-             return _replace(arguments, 1);
-           },
-           // Same as calling pop and then perform
-           overwrite: function overwrite() {
-             select(document).interrupt('history.perform');
-             return _overwrite(arguments, 1);
-           },
-           pop: function pop(n) {
-             select(document).interrupt('history.perform');
-             var previous = _stack[_index].graph;
+           texts.enter().append('text').attr('class', function (d, i) {
+             return classes + ' ' + labels[i].classes + ' ' + d.id;
+           }).attr('dy', baselineHack ? '0.35em' : null).append('textPath').attr('class', 'textpath'); // update
 
-             if (isNaN(+n) || +n < 0) {
-               n = 1;
-             }
+           selection.selectAll('text.' + classes).selectAll('.textpath').filter(filter).data(entities, osmEntity.key).attr('startOffset', '50%').attr('xlink:href', function (d) {
+             return '#ideditor-labelpath-' + d.id;
+           }).text(utilDisplayNameForPath);
+         }
 
-             while (n-- > 0 && _index > 0) {
-               _index--;
+         function drawPointLabels(selection, entities, filter, classes, labels) {
+           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-               _stack.pop();
-             }
+           texts.exit().remove(); // enter/update
 
-             return change(previous);
-           },
-           // Back to the previous annotated state or _index = 0.
-           undo: function undo() {
-             select(document).interrupt('history.perform');
-             var previousStack = _stack[_index];
-             var previous = previousStack.graph;
+           texts.enter().append('text').attr('class', function (d, i) {
+             return classes + ' ' + labels[i].classes + ' ' + d.id;
+           }).merge(texts).attr('x', get(labels, 'x')).attr('y', get(labels, 'y')).style('text-anchor', get(labels, 'textAnchor')).text(utilDisplayName).each(function (d, i) {
+             textWidth(utilDisplayName(d), labels[i].height, this);
+           });
+         }
 
-             while (_index > 0) {
-               _index--;
-               if (_stack[_index].annotation) break;
-             }
+         function drawAreaLabels(selection, entities, filter, classes, labels) {
+           entities = entities.filter(hasText);
+           labels = labels.filter(hasText);
+           drawPointLabels(selection, entities, filter, classes, labels);
 
-             dispatch$1.call('undone', this, _stack[_index], previousStack);
-             return change(previous);
-           },
-           // Forward to the next annotated state.
-           redo: function redo() {
-             select(document).interrupt('history.perform');
-             var previousStack = _stack[_index];
-             var previous = previousStack.graph;
-             var tryIndex = _index;
+           function hasText(d, i) {
+             return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
+           }
+         }
 
-             while (tryIndex < _stack.length - 1) {
-               tryIndex++;
+         function drawAreaIcons(selection, entities, filter, classes, labels) {
+           var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
 
-               if (_stack[tryIndex].annotation) {
-                 _index = tryIndex;
-                 dispatch$1.call('redone', this, _stack[_index], previousStack);
-                 break;
-               }
-             }
+           icons.exit().remove(); // enter/update
 
-             return change(previous);
-           },
-           pauseChangeDispatch: function pauseChangeDispatch() {
-             if (!_pausedGraph) {
-               _pausedGraph = _stack[_index].graph;
-             }
-           },
-           resumeChangeDispatch: function resumeChangeDispatch() {
-             if (_pausedGraph) {
-               var previous = _pausedGraph;
-               _pausedGraph = null;
-               return change(previous);
-             }
-           },
-           undoAnnotation: function undoAnnotation() {
-             var i = _index;
+           icons.enter().append('use').attr('class', 'icon ' + classes).attr('width', '17px').attr('height', '17px').merge(icons).attr('transform', get(labels, 'transform')).attr('xlink:href', function (d) {
+             var preset = _mainPresetIndex.match(d, context.graph());
+             var picon = preset && preset.icon;
 
-             while (i >= 0) {
-               if (_stack[i].annotation) return _stack[i].annotation;
-               i--;
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return '#' + picon + (isMaki ? '-15' : '');
              }
-           },
-           redoAnnotation: function redoAnnotation() {
-             var i = _index + 1;
+           });
+         }
 
-             while (i <= _stack.length - 1) {
-               if (_stack[i].annotation) return _stack[i].annotation;
-               i++;
-             }
-           },
-           // Returns the entities from the active graph with bounding boxes
-           // overlapping the given `extent`.
-           intersects: function intersects(extent) {
-             return _tree.intersects(extent, _stack[_index].graph);
-           },
-           difference: function difference() {
-             var base = _stack[0].graph;
-             var head = _stack[_index].graph;
-             return coreDifference(base, head);
-           },
-           changes: function changes(action) {
-             var base = _stack[0].graph;
-             var head = _stack[_index].graph;
+         function drawCollisionBoxes(selection, rtree, which) {
+           var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
+           var gj = [];
 
-             if (action) {
-               head = action(head);
-             }
+           if (context.getDebug('collision')) {
+             gj = rtree.all().map(function (d) {
+               return {
+                 type: 'Polygon',
+                 coordinates: [[[d.minX, d.minY], [d.maxX, d.minY], [d.maxX, d.maxY], [d.minX, d.maxY], [d.minX, d.minY]]]
+               };
+             });
+           }
 
-             var difference = coreDifference(base, head);
-             return {
-               modified: difference.modified(),
-               created: difference.created(),
-               deleted: difference.deleted()
-             };
-           },
-           hasChanges: function hasChanges() {
-             return this.difference().length() > 0;
-           },
-           imageryUsed: function imageryUsed(sources) {
-             if (sources) {
-               _imageryUsed = sources;
-               return history;
-             } else {
-               var s = new Set();
+           var boxes = selection.selectAll('.' + which).data(gj); // exit
 
-               _stack.slice(1, _index + 1).forEach(function (state) {
-                 state.imageryUsed.forEach(function (source) {
-                   if (source !== 'Custom') {
-                     s.add(source);
-                   }
-                 });
-               });
+           boxes.exit().remove(); // enter/update
 
-               return Array.from(s);
-             }
-           },
-           photoOverlaysUsed: function photoOverlaysUsed(sources) {
-             if (sources) {
-               _photoOverlaysUsed = sources;
-               return history;
-             } else {
-               var s = new Set();
+           boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
+         }
 
-               _stack.slice(1, _index + 1).forEach(function (state) {
-                 if (state.photoOverlaysUsed && Array.isArray(state.photoOverlaysUsed)) {
-                   state.photoOverlaysUsed.forEach(function (photoOverlay) {
-                     s.add(photoOverlay);
-                   });
-                 }
-               });
+         function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           var labelable = [];
+           var renderNodeAs = {};
+           var i, j, k, entity, geometry;
 
-               return Array.from(s);
-             }
-           },
-           // save the current history state
-           checkpoint: function checkpoint(key) {
-             _checkpoints[key] = {
-               stack: _stack,
-               index: _index
-             };
-             return history;
-           },
-           // restore history state to a given checkpoint or reset completely
-           reset: function reset(key) {
-             if (key !== undefined && _checkpoints.hasOwnProperty(key)) {
-               _stack = _checkpoints[key].stack;
-               _index = _checkpoints[key].index;
-             } else {
-               _stack = [{
-                 graph: coreGraph()
-               }];
-               _index = 0;
-               _tree = coreTree(_stack[0].graph);
-               _checkpoints = {};
-             }
+           for (i = 0; i < labelStack.length; i++) {
+             labelable.push([]);
+           }
 
-             dispatch$1.call('reset');
-             dispatch$1.call('change');
-             return history;
-           },
-           // `toIntroGraph()` is used to export the intro graph used by the walkthrough.
-           //
-           // To use it:
-           //  1. Start the walkthrough.
-           //  2. Get to a "free editing" tutorial step
-           //  3. Make your edits to the walkthrough map
-           //  4. In your browser dev console run:
-           //        `id.history().toIntroGraph()`
-           //  5. This outputs stringified JSON to the browser console
-           //  6. Copy it to `data/intro_graph.json` and prettify it in your code editor
-           toIntroGraph: function toIntroGraph() {
-             var nextID = {
-               n: 0,
-               r: 0,
-               w: 0
-             };
-             var permIDs = {};
-             var graph = this.graph();
-             var baseEntities = {}; // clone base entities..
+           if (fullRedraw) {
+             _rdrawn.clear();
 
-             Object.values(graph.base().entities).forEach(function (entity) {
-               var copy = copyIntroEntity(entity);
-               baseEntities[copy.id] = copy;
-             }); // replace base entities with head entities..
+             _rskipped.clear();
 
-             Object.keys(graph.entities).forEach(function (id) {
-               var entity = graph.entities[id];
+             _entitybboxes = {};
+           } else {
+             for (i = 0; i < entities.length; i++) {
+               entity = entities[i];
+               var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
 
-               if (entity) {
-                 var copy = copyIntroEntity(entity);
-                 baseEntities[copy.id] = copy;
-               } else {
-                 delete baseEntities[id];
-               }
-             }); // swap temporary for permanent ids..
+               for (j = 0; j < toRemove.length; j++) {
+                 _rdrawn.remove(toRemove[j]);
 
-             Object.values(baseEntities).forEach(function (entity) {
-               if (Array.isArray(entity.nodes)) {
-                 entity.nodes = entity.nodes.map(function (node) {
-                   return permIDs[node] || node;
-                 });
+                 _rskipped.remove(toRemove[j]);
                }
+             }
+           } // Loop through all the entities to do some preprocessing
 
-               if (Array.isArray(entity.members)) {
-                 entity.members = entity.members.map(function (member) {
-                   member.id = permIDs[member.id] || member.id;
-                   return member;
-                 });
-               }
-             });
-             return JSON.stringify({
-               dataIntroGraph: baseEntities
-             });
 
-             function copyIntroEntity(source) {
-               var copy = utilObjectOmit(source, ['type', 'user', 'v', 'version', 'visible']); // Note: the copy is no longer an osmEntity, so it might not have `tags`
+           for (i = 0; i < entities.length; i++) {
+             entity = entities[i];
+             geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
 
-               if (copy.tags && !Object.keys(copy.tags)) {
-                 delete copy.tags;
-               }
+             if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
+               var hasDirections = entity.directions(graph, projection).length;
+               var markerPadding;
 
-               if (Array.isArray(copy.loc)) {
-                 copy.loc[0] = +copy.loc[0].toFixed(6);
-                 copy.loc[1] = +copy.loc[1].toFixed(6);
+               if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
+                 renderNodeAs[entity.id] = 'point';
+                 markerPadding = 20; // extra y for marker height
+               } else {
+                 renderNodeAs[entity.id] = 'vertex';
+                 markerPadding = 0;
                }
 
-               var match = source.id.match(/([nrw])-\d*/); // temporary id
+               var coord = projection(entity.loc);
+               var nodePadding = 10;
+               var bbox = {
+                 minX: coord[0] - nodePadding,
+                 minY: coord[1] - nodePadding - markerPadding,
+                 maxX: coord[0] + nodePadding,
+                 maxY: coord[1] + nodePadding
+               };
+               doInsert(bbox, entity.id + 'P');
+             } // From here on, treat vertices like points
 
-               if (match !== null) {
-                 var nrw = match[1];
-                 var permID;
 
-                 do {
-                   permID = nrw + ++nextID[nrw];
-                 } while (baseEntities.hasOwnProperty(permID));
+             if (geometry === 'vertex') {
+               geometry = 'point';
+             } // Determine which entities are label-able
 
-                 copy.id = permIDs[source.id] = permID;
-               }
 
-               return copy;
+             var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
+             var icon = preset && !shouldSkipIcon(preset) && preset.icon;
+             if (!icon && !utilDisplayName(entity)) continue;
+
+             for (k = 0; k < labelStack.length; k++) {
+               var matchGeom = labelStack[k][0];
+               var matchKey = labelStack[k][1];
+               var matchVal = labelStack[k][2];
+               var hasVal = entity.tags[matchKey];
+
+               if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
+                 labelable[k].push(entity);
+                 break;
+               }
              }
-           },
-           toJSON: function toJSON() {
-             if (!this.hasChanges()) return;
-             var allEntities = {};
-             var baseEntities = {};
-             var base = _stack[0];
+           }
 
-             var s = _stack.map(function (i) {
-               var modified = [];
-               var deleted = [];
-               Object.keys(i.graph.entities).forEach(function (id) {
-                 var entity = i.graph.entities[id];
+           var positions = {
+             point: [],
+             line: [],
+             area: []
+           };
+           var labelled = {
+             point: [],
+             line: [],
+             area: []
+           }; // Try and find a valid label for labellable entities
 
-                 if (entity) {
-                   var key = osmEntity.key(entity);
-                   allEntities[key] = entity;
-                   modified.push(key);
-                 } else {
-                   deleted.push(id);
-                 } // make sure that the originals of changed or deleted entities get merged
-                 // into the base of the _stack after restoring the data from JSON.
+           for (k = 0; k < labelable.length; k++) {
+             var fontSize = labelStack[k][3];
 
+             for (i = 0; i < labelable[k].length; i++) {
+               entity = labelable[k][i];
+               geometry = entity.geometry(graph);
+               var getName = geometry === 'line' ? utilDisplayNameForPath : utilDisplayName;
+               var name = getName(entity);
+               var width = name && textWidth(name, fontSize);
+               var p = null;
 
-                 if (id in base.graph.entities) {
-                   baseEntities[id] = base.graph.entities[id];
-                 }
+               if (geometry === 'point' || geometry === 'vertex') {
+                 // no point or vertex labels in wireframe mode
+                 // no vertex labels at low zooms (vertices have no icons)
+                 if (wireframe) continue;
+                 var renderAs = renderNodeAs[entity.id];
+                 if (renderAs === 'vertex' && zoom < 17) continue;
+                 p = getPointLabel(entity, width, fontSize, renderAs);
+               } else if (geometry === 'line') {
+                 p = getLineLabel(entity, width, fontSize);
+               } else if (geometry === 'area') {
+                 p = getAreaLabel(entity, width, fontSize);
+               }
 
-                 if (entity && entity.nodes) {
-                   // get originals of pre-existing child nodes
-                   entity.nodes.forEach(function (nodeID) {
-                     if (nodeID in base.graph.entities) {
-                       baseEntities[nodeID] = base.graph.entities[nodeID];
-                     }
-                   });
-                 } // get originals of parent entities too
+               if (p) {
+                 if (geometry === 'vertex') {
+                   geometry = 'point';
+                 } // treat vertex like point
 
 
-                 var baseParents = base.graph._parentWays[id];
+                 p.classes = geometry + ' tag-' + labelStack[k][1];
+                 positions[geometry].push(p);
+                 labelled[geometry].push(entity);
+               }
+             }
+           }
 
-                 if (baseParents) {
-                   baseParents.forEach(function (parentID) {
-                     if (parentID in base.graph.entities) {
-                       baseEntities[parentID] = base.graph.entities[parentID];
-                     }
-                   });
-                 }
-               });
-               var x = {};
-               if (modified.length) x.modified = modified;
-               if (deleted.length) x.deleted = deleted;
-               if (i.imageryUsed) x.imageryUsed = i.imageryUsed;
-               if (i.photoOverlaysUsed) x.photoOverlaysUsed = i.photoOverlaysUsed;
-               if (i.annotation) x.annotation = i.annotation;
-               if (i.transform) x.transform = i.transform;
-               if (i.selectedIDs) x.selectedIDs = i.selectedIDs;
-               return x;
+           function isInterestingVertex(entity) {
+             var selectedIDs = context.selectedIDs();
+             return entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || selectedIDs.indexOf(entity.id) !== -1 || graph.parentWays(entity).some(function (parent) {
+               return selectedIDs.indexOf(parent.id) !== -1;
              });
+           }
 
-             return JSON.stringify({
-               version: 3,
-               entities: Object.values(allEntities),
-               baseEntities: Object.values(baseEntities),
-               stack: s,
-               nextIDs: osmEntity.id.next,
-               index: _index,
-               // note the time the changes were saved
-               timestamp: new Date().getTime()
-             });
-           },
-           fromJSON: function fromJSON(json, loadChildNodes) {
-             var h = JSON.parse(json);
-             var loadComplete = true;
-             osmEntity.id.next = h.nextIDs;
-             _index = h.index;
+           function getPointLabel(entity, width, height, geometry) {
+             var y = geometry === 'point' ? -12 : 0;
+             var pointOffsets = {
+               ltr: [15, y, 'start'],
+               rtl: [-15, y, 'end']
+             };
+             var textDirection = _mainLocalizer.textDirection();
+             var coord = projection(entity.loc);
+             var textPadding = 2;
+             var offset = pointOffsets[textDirection];
+             var p = {
+               height: height,
+               width: width,
+               x: coord[0] + offset[0],
+               y: coord[1] + offset[1],
+               textAnchor: offset[2]
+             }; // insert a collision box for the text label..
+
+             var bbox;
+
+             if (textDirection === 'rtl') {
+               bbox = {
+                 minX: p.x - width - textPadding,
+                 minY: p.y - height / 2 - textPadding,
+                 maxX: p.x + textPadding,
+                 maxY: p.y + height / 2 + textPadding
+               };
+             } else {
+               bbox = {
+                 minX: p.x - textPadding,
+                 minY: p.y - height / 2 - textPadding,
+                 maxX: p.x + width + textPadding,
+                 maxY: p.y + height / 2 + textPadding
+               };
+             }
 
-             if (h.version === 2 || h.version === 3) {
-               var allEntities = {};
-               h.entities.forEach(function (entity) {
-                 allEntities[osmEntity.key(entity)] = osmEntity(entity);
-               });
+             if (tryInsert([bbox], entity.id, true)) {
+               return p;
+             }
+           }
 
-               if (h.version === 3) {
-                 // This merges originals for changed entities into the base of
-                 // the _stack even if the current _stack doesn't have them (for
-                 // example when iD has been restarted in a different region)
-                 var baseEntities = h.baseEntities.map(function (d) {
-                   return osmEntity(d);
-                 });
+           function getLineLabel(entity, width, height) {
+             var viewport = geoExtent(context.projection.clipExtent()).polygon();
+             var points = graph.childNodes(entity).map(function (node) {
+               return projection(node.loc);
+             });
+             var length = geoPathLength(points);
+             if (length < width + 20) return; // % along the line to attempt to place the label
 
-                 var stack = _stack.map(function (state) {
-                   return state.graph;
-                 });
+             var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
+             var padding = 3;
 
-                 _stack[0].graph.rebase(baseEntities, stack, true);
+             for (var i = 0; i < lineOffsets.length; i++) {
+               var offset = lineOffsets[i];
+               var middle = offset / 100 * length;
+               var start = middle - width / 2;
+               if (start < 0 || start + width > length) continue; // generate subpath and ignore paths that are invalid or don't cross viewport.
 
-                 _tree.rebase(baseEntities, true); // When we restore a modified way, we also need to fetch any missing
-                 // childnodes that would normally have been downloaded with it.. #2142
+               var sub = subpath(points, start, start + width);
 
+               if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
+                 continue;
+               }
 
-                 if (loadChildNodes) {
-                   var osm = context.connection();
-                   var baseWays = baseEntities.filter(function (e) {
-                     return e.type === 'way';
-                   });
-                   var nodeIDs = baseWays.reduce(function (acc, way) {
-                     return utilArrayUnion(acc, way.nodes);
-                   }, []);
-                   var missing = nodeIDs.filter(function (n) {
-                     return !_stack[0].graph.hasEntity(n);
-                   });
+               var isReverse = reverse(sub);
 
-                   if (missing.length && osm) {
-                     loadComplete = false;
-                     context.map().redrawEnable(false);
-                     var loading = uiLoading(context).blocking(true);
-                     context.container().call(loading);
+               if (isReverse) {
+                 sub = sub.reverse();
+               }
 
-                     var childNodesLoaded = function childNodesLoaded(err, result) {
-                       if (!err) {
-                         var visibleGroups = utilArrayGroupBy(result.data, 'visible');
-                         var visibles = visibleGroups["true"] || []; // alive nodes
+               var bboxes = [];
+               var boxsize = (height + 2) / 2;
 
-                         var invisibles = visibleGroups["false"] || []; // deleted nodes
+               for (var j = 0; j < sub.length - 1; j++) {
+                 var a = sub[j];
+                 var b = sub[j + 1]; // split up the text into small collision boxes
 
-                         if (visibles.length) {
-                           var visibleIDs = visibles.map(function (entity) {
-                             return entity.id;
-                           });
+                 var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
 
-                           var stack = _stack.map(function (state) {
-                             return state.graph;
-                           });
+                 for (var box = 0; box < num; box++) {
+                   var p = geoVecInterp(a, b, box / num);
+                   var x0 = p[0] - boxsize - padding;
+                   var y0 = p[1] - boxsize - padding;
+                   var x1 = p[0] + boxsize + padding;
+                   var y1 = p[1] + boxsize + padding;
+                   bboxes.push({
+                     minX: Math.min(x0, x1),
+                     minY: Math.min(y0, y1),
+                     maxX: Math.max(x0, x1),
+                     maxY: Math.max(y0, y1)
+                   });
+                 }
+               }
 
-                           missing = utilArrayDifference(missing, visibleIDs);
+               if (tryInsert(bboxes, entity.id, false)) {
+                 // accept this one
+                 return {
+                   'font-size': height + 2,
+                   lineString: lineString(sub),
+                   startOffset: offset + '%'
+                 };
+               }
+             }
 
-                           _stack[0].graph.rebase(visibles, stack, true);
+             function reverse(p) {
+               var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
+               return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI / 2 && angle > -Math.PI / 2);
+             }
 
-                           _tree.rebase(visibles, true);
-                         } // fetch older versions of nodes that were deleted..
+             function lineString(points) {
+               return 'M' + points.join('L');
+             }
 
+             function subpath(points, from, to) {
+               var sofar = 0;
+               var start, end, i0, i1;
 
-                         invisibles.forEach(function (entity) {
-                           osm.loadEntityVersion(entity.id, +entity.version - 1, childNodesLoaded);
-                         });
-                       }
+               for (var i = 0; i < points.length - 1; i++) {
+                 var a = points[i];
+                 var b = points[i + 1];
+                 var current = geoVecLength(a, b);
+                 var portion;
 
-                       if (err || !missing.length) {
-                         loading.close();
-                         context.map().redrawEnable(true);
-                         dispatch$1.call('change');
-                         dispatch$1.call('restore', this);
-                       }
-                     };
+                 if (!start && sofar + current >= from) {
+                   portion = (from - sofar) / current;
+                   start = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+                   i0 = i + 1;
+                 }
 
-                     osm.loadMultiple(missing, childNodesLoaded);
-                   }
+                 if (!end && sofar + current >= to) {
+                   portion = (to - sofar) / current;
+                   end = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
+                   i1 = i + 1;
                  }
+
+                 sofar += current;
                }
 
-               _stack = h.stack.map(function (d) {
-                 var entities = {},
-                     entity;
+               var result = points.slice(i0, i1);
+               result.unshift(start);
+               result.push(end);
+               return result;
+             }
+           }
 
-                 if (d.modified) {
-                   d.modified.forEach(function (key) {
-                     entity = allEntities[key];
-                     entities[entity.id] = entity;
-                   });
-                 }
+           function getAreaLabel(entity, width, height) {
+             var centroid = path.centroid(entity.asGeoJSON(graph));
+             var extent = entity.extent(graph);
+             var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
+             if (isNaN(centroid[0]) || areaWidth < 20) return;
+             var preset = _mainPresetIndex.match(entity, context.graph());
+             var picon = preset && preset.icon;
+             var iconSize = 17;
+             var padding = 2;
+             var p = {};
 
-                 if (d.deleted) {
-                   d.deleted.forEach(function (id) {
-                     entities[id] = undefined;
-                   });
-                 }
+             if (picon) {
+               // icon and label..
+               if (addIcon()) {
+                 addLabel(iconSize + padding);
+                 return p;
+               }
+             } else {
+               // label only..
+               if (addLabel(0)) {
+                 return p;
+               }
+             }
 
-                 return {
-                   graph: coreGraph(_stack[0].graph).load(entities),
-                   annotation: d.annotation,
-                   imageryUsed: d.imageryUsed,
-                   photoOverlaysUsed: d.photoOverlaysUsed,
-                   transform: d.transform,
-                   selectedIDs: d.selectedIDs
+             function addIcon() {
+               var iconX = centroid[0] - iconSize / 2;
+               var iconY = centroid[1] - iconSize / 2;
+               var bbox = {
+                 minX: iconX,
+                 minY: iconY,
+                 maxX: iconX + iconSize,
+                 maxY: iconY + iconSize
+               };
+
+               if (tryInsert([bbox], entity.id + 'I', true)) {
+                 p.transform = 'translate(' + iconX + ',' + iconY + ')';
+                 return true;
+               }
+
+               return false;
+             }
+
+             function addLabel(yOffset) {
+               if (width && areaWidth >= width + 20) {
+                 var labelX = centroid[0];
+                 var labelY = centroid[1] + yOffset;
+                 var bbox = {
+                   minX: labelX - width / 2 - padding,
+                   minY: labelY - height / 2 - padding,
+                   maxX: labelX + width / 2 + padding,
+                   maxY: labelY + height / 2 + padding
                  };
-               });
-             } else {
-               // original version
-               _stack = h.stack.map(function (d) {
-                 var entities = {};
 
-                 for (var i in d.entities) {
-                   var entity = d.entities[i];
-                   entities[i] = entity === 'undefined' ? undefined : osmEntity(entity);
+                 if (tryInsert([bbox], entity.id, true)) {
+                   p.x = labelX;
+                   p.y = labelY;
+                   p.textAnchor = 'middle';
+                   p.height = height;
+                   return true;
                  }
+               }
 
-                 d.graph = coreGraph(_stack[0].graph).load(entities);
-                 return d;
-               });
+               return false;
              }
+           } // force insert a singular bounding box
+           // singular box only, no array, id better be unique
 
-             var transform = _stack[_index].transform;
 
-             if (transform) {
-               context.map().transformEase(transform, 0); // 0 = immediate, no easing
-             }
+           function doInsert(bbox, id) {
+             bbox.id = id;
+             var oldbox = _entitybboxes[id];
 
-             if (loadComplete) {
-               dispatch$1.call('change');
-               dispatch$1.call('restore', this);
+             if (oldbox) {
+               _rdrawn.remove(oldbox);
              }
 
-             return history;
-           },
-           lock: function lock() {
-             return _lock.lock();
-           },
-           unlock: function unlock() {
-             _lock.unlock();
-           },
-           save: function save() {
-             if (_lock.locked() && // don't overwrite existing, unresolved changes
-             !_hasUnresolvedRestorableChanges) {
-               corePreferences(getKey('saved_history'), history.toJSON() || null);
-             }
+             _entitybboxes[id] = bbox;
 
-             return history;
-           },
-           // delete the history version saved in localStorage
-           clearSaved: function clearSaved() {
-             context.debouncedSave.cancel();
+             _rdrawn.insert(bbox);
+           }
 
-             if (_lock.locked()) {
-               _hasUnresolvedRestorableChanges = false;
-               corePreferences(getKey('saved_history'), null); // clear the changeset metadata associated with the saved history
+           function tryInsert(bboxes, id, saveSkipped) {
+             var skipped = false;
 
-               corePreferences('comment', null);
-               corePreferences('hashtags', null);
-               corePreferences('source', null);
+             for (var i = 0; i < bboxes.length; i++) {
+               var bbox = bboxes[i];
+               bbox.id = id; // Check that label is visible
+
+               if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
+                 skipped = true;
+                 break;
+               }
+
+               if (_rdrawn.collides(bbox)) {
+                 skipped = true;
+                 break;
+               }
              }
 
-             return history;
-           },
-           savedHistoryJSON: function savedHistoryJSON() {
-             return corePreferences(getKey('saved_history'));
-           },
-           hasRestorableChanges: function hasRestorableChanges() {
-             return _hasUnresolvedRestorableChanges;
-           },
-           // load history from a version stored in localStorage
-           restore: function restore() {
-             if (_lock.locked()) {
-               _hasUnresolvedRestorableChanges = false;
-               var json = this.savedHistoryJSON();
-               if (json) history.fromJSON(json, true);
+             _entitybboxes[id] = bboxes;
+
+             if (skipped) {
+               if (saveSkipped) {
+                 _rskipped.load(bboxes);
+               }
+             } else {
+               _rdrawn.load(bboxes);
              }
-           },
-           _getKey: getKey
-         };
-         history.reset();
-         return utilRebind(history, dispatch$1, 'on');
-       }
 
-       /**
-        * Look for roads that can be connected to other roads with a short extension
-        */
+             return !skipped;
+           }
 
-       function validationAlmostJunction(context) {
-         var type = 'almost_junction';
-         var EXTEND_TH_METERS = 5;
-         var WELD_TH_METERS = 0.75; // Comes from considering bounding case of parallel ways
+           var layer = selection.selectAll('.layer-osm.labels');
+           layer.selectAll('.labels-group').data(['halo', 'label', 'debug']).enter().append('g').attr('class', function (d) {
+             return 'labels-group ' + d;
+           });
+           var halo = layer.selectAll('.labels-group.halo');
+           var label = layer.selectAll('.labels-group.label');
+           var debug = layer.selectAll('.labels-group.debug'); // points
 
-         var CLOSE_NODE_TH = EXTEND_TH_METERS - WELD_TH_METERS; // Comes from considering bounding case of perpendicular ways
+           drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
+           drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
 
-         var SIG_ANGLE_TH = Math.atan(WELD_TH_METERS / EXTEND_TH_METERS);
+           drawLinePaths(layer, labelled.line, filter, '', positions.line);
+           drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
+           drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line); // areas
 
-         function isHighway(entity) {
-           return entity.type === 'way' && osmRoutableHighwayTagValues[entity.tags.highway];
-         }
+           drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
+           drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
+           drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
+           drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area); // debug
 
-         function isTaggedAsNotContinuing(node) {
-           return node.tags.noexit === 'yes' || node.tags.amenity === 'parking_entrance' || node.tags.entrance && node.tags.entrance !== 'no';
+           drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
+           drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
+           layer.call(filterLabels);
          }
 
-         var validation = function checkAlmostJunction(entity, graph) {
-           if (!isHighway(entity)) return [];
-           if (entity.isDegenerate()) return [];
-           var tree = context.history().tree();
-           var extendableNodeInfos = findConnectableEndNodesByExtension(entity);
-           var issues = [];
-           extendableNodeInfos.forEach(function (extendableNodeInfo) {
-             issues.push(new validationIssue({
-               type: type,
-               subtype: 'highway-highway',
-               severity: 'warning',
-               message: function message(context) {
-                 var entity1 = context.hasEntity(this.entityIds[0]);
+         function filterLabels(selection) {
+           var drawLayer = selection.selectAll('.layer-osm.labels');
+           var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
+           layers.selectAll('.nolabel').classed('nolabel', false);
+           var mouse = context.map().mouse();
+           var graph = context.graph();
+           var selectedIDs = context.selectedIDs();
+           var ids = [];
+           var pad, bbox; // hide labels near the mouse
 
-                 if (this.entityIds[0] === this.entityIds[2]) {
-                   return entity1 ? _t.html('issues.almost_junction.self.message', {
-                     feature: utilDisplayLabel(entity1, context.graph())
-                   }) : '';
-                 } else {
-                   var entity2 = context.hasEntity(this.entityIds[2]);
-                   return entity1 && entity2 ? _t.html('issues.almost_junction.message', {
-                     feature: utilDisplayLabel(entity1, context.graph()),
-                     feature2: utilDisplayLabel(entity2, context.graph())
-                   }) : '';
-                 }
-               },
-               reference: showReference,
-               entityIds: [entity.id, extendableNodeInfo.node.id, extendableNodeInfo.wid],
-               loc: extendableNodeInfo.node.loc,
-               hash: JSON.stringify(extendableNodeInfo.node.loc),
-               data: {
-                 midId: extendableNodeInfo.mid.id,
-                 edge: extendableNodeInfo.edge,
-                 cross_loc: extendableNodeInfo.cross_loc
-               },
-               dynamicFixes: makeFixes
-             }));
-           });
-           return issues;
+           if (mouse) {
+             pad = 20;
+             bbox = {
+               minX: mouse[0] - pad,
+               minY: mouse[1] - pad,
+               maxX: mouse[0] + pad,
+               maxY: mouse[1] + pad
+             };
 
-           function makeFixes(context) {
-             var fixes = [new validationIssueFix({
-               icon: 'iD-icon-abutment',
-               title: _t.html('issues.fix.connect_features.title'),
-               onClick: function onClick(context) {
-                 var annotation = _t('issues.fix.connect_almost_junction.annotation');
+             var nearMouse = _rdrawn.search(bbox).map(function (entity) {
+               return entity.id;
+             });
 
-                 var _this$issue$entityIds = _slicedToArray(this.issue.entityIds, 3),
-                     endNodeId = _this$issue$entityIds[1],
-                     crossWayId = _this$issue$entityIds[2];
+             ids.push.apply(ids, nearMouse);
+           } // hide labels on selected nodes (they look weird when dragging / haloed)
 
-                 var midNode = context.entity(this.issue.data.midId);
-                 var endNode = context.entity(endNodeId);
-                 var crossWay = context.entity(crossWayId); // When endpoints are close, just join if resulting small change in angle (#7201)
 
-                 var nearEndNodes = findNearbyEndNodes(endNode, crossWay);
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = graph.hasEntity(selectedIDs[i]);
 
-                 if (nearEndNodes.length > 0) {
-                   var collinear = findSmallJoinAngle(midNode, endNode, nearEndNodes);
+             if (entity && entity.type === 'node') {
+               ids.push(selectedIDs[i]);
+             }
+           }
 
-                   if (collinear) {
-                     context.perform(actionMergeNodes([collinear.id, endNode.id], collinear.loc), annotation);
-                     return;
-                   }
-                 }
+           layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
 
-                 var targetEdge = this.issue.data.edge;
-                 var crossLoc = this.issue.data.cross_loc;
-                 var edgeNodes = [context.entity(targetEdge[0]), context.entity(targetEdge[1])];
-                 var closestNodeInfo = geoSphericalClosestNode(edgeNodes, crossLoc); // already a point nearby, just connect to that
+           var debug = selection.selectAll('.labels-group.debug');
+           var gj = [];
 
-                 if (closestNodeInfo.distance < WELD_TH_METERS) {
-                   context.perform(actionMergeNodes([closestNodeInfo.node.id, endNode.id], closestNodeInfo.node.loc), annotation); // else add the end node to the edge way
-                 } else {
-                   context.perform(actionAddMidpoint({
-                     loc: crossLoc,
-                     edge: targetEdge
-                   }, endNode), annotation);
-                 }
-               }
-             })];
-             var node = context.hasEntity(this.entityIds[1]);
+           if (context.getDebug('collision')) {
+             gj = bbox ? [{
+               type: 'Polygon',
+               coordinates: [[[bbox.minX, bbox.minY], [bbox.maxX, bbox.minY], [bbox.maxX, bbox.maxY], [bbox.minX, bbox.maxY], [bbox.minX, bbox.minY]]]
+             }] : [];
+           }
 
-             if (node && !node.hasInterestingTags()) {
-               // node has no descriptive tags, suggest noexit fix
-               fixes.push(new validationIssueFix({
-                 icon: 'maki-barrier',
-                 title: _t.html('issues.fix.tag_as_disconnected.title'),
-                 onClick: function onClick(context) {
-                   var nodeID = this.issue.entityIds[1];
-                   var tags = Object.assign({}, context.entity(nodeID).tags);
-                   tags.noexit = 'yes';
-                   context.perform(actionChangeTags(nodeID, tags), _t('issues.fix.tag_as_disconnected.annotation'));
-                 }
-               }));
-             }
+           var box = debug.selectAll('.debug-mouse').data(gj); // exit
 
-             return fixes;
-           }
+           box.exit().remove(); // enter/update
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.almost_junction.highway-highway.reference'));
-           }
+           box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
+         }
 
-           function isExtendableCandidate(node, way) {
-             // can not accurately test vertices on tiles not downloaded from osm - #5938
-             var osm = services.osm;
+         var throttleFilterLabels = throttle(filterLabels, 100);
 
-             if (osm && !osm.isDataLoaded(node.loc)) {
-               return false;
-             }
+         drawLabels.observe = function (selection) {
+           var listener = function listener() {
+             throttleFilterLabels(selection);
+           };
+
+           selection.on('mousemove.hidelabels', listener);
+           context.on('enter.hidelabels', listener);
+         };
+
+         drawLabels.off = function (selection) {
+           throttleFilterLabels.cancel();
+           selection.on('mousemove.hidelabels', null);
+           context.on('enter.hidelabels', null);
+         };
+
+         return drawLabels;
+       }
+
+       var _layerEnabled$1 = false;
+
+       var _qaService$1;
+
+       function svgImproveOSM(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);
 
-             if (isTaggedAsNotContinuing(node) || graph.parentWays(node).length !== 1) {
-               return false;
-             }
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;
 
-             var occurrences = 0;
+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+         } // Loosely-coupled improveOSM service for fetching issues
 
-             for (var index in way.nodes) {
-               if (way.nodes[index] === node.id) {
-                 occurrences += 1;
 
-                 if (occurrences > 1) {
-                   return false;
-                 }
-               }
-             }
+         function getService() {
+           if (services.improveOSM && !_qaService$1) {
+             _qaService$1 = services.improveOSM;
 
-             return true;
+             _qaService$1.on('loaded', throttledRedraw);
+           } else if (!services.improveOSM && _qaService$1) {
+             _qaService$1 = null;
            }
 
-           function findConnectableEndNodesByExtension(way) {
-             var results = [];
-             if (way.isClosed()) return results;
-             var testNodes;
-             var indices = [0, way.nodes.length - 1];
-             indices.forEach(function (nodeIndex) {
-               var nodeID = way.nodes[nodeIndex];
-               var node = graph.entity(nodeID);
-               if (!isExtendableCandidate(node, way)) return;
-               var connectionInfo = canConnectByExtend(way, nodeIndex);
-               if (!connectionInfo) return;
-               testNodes = graph.childNodes(way).slice(); // shallow copy
+           return _qaService$1;
+         } // Show the markers
 
-               testNodes[nodeIndex] = testNodes[nodeIndex].move(connectionInfo.cross_loc); // don't flag issue if connecting the ways would cause self-intersection
 
-               if (geoHasSelfIntersections(testNodes, nodeID)) return;
-               results.push(connectionInfo);
-             });
-             return results;
+         function editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
            }
+         } // Immediately remove the markers and their touch targets
 
-           function findNearbyEndNodes(node, way) {
-             return [way.nodes[0], way.nodes[way.nodes.length - 1]].map(function (d) {
-               return graph.entity(d);
-             }).filter(function (d) {
-               // Node cannot be near to itself, but other endnode of same way could be
-               return d.id !== node.id && geoSphericalDistance(node.loc, d.loc) <= CLOSE_NODE_TH;
-             });
-           }
 
-           function findSmallJoinAngle(midNode, tipNode, endNodes) {
-             // Both nodes could be close, so want to join whichever is closest to collinear
-             var joinTo;
-             var minAngle = Infinity; // Checks midNode -> tipNode -> endNode for collinearity
+         function editOff() {
+           if (layerVisible) {
+             layerVisible = false;
+             drawLayer.style('display', 'none');
+             drawLayer.selectAll('.qaItem.improveOSM').remove();
+             touchLayer.selectAll('.qaItem.improveOSM').remove();
+           }
+         } // Enable the layer.  This shows the markers and transitions them to visible.
 
-             endNodes.forEach(function (endNode) {
-               var a1 = geoAngle(midNode, tipNode, context.projection) + Math.PI;
-               var a2 = geoAngle(midNode, endNode, context.projection) + Math.PI;
-               var diff = Math.max(a1, a2) - Math.min(a1, a2);
 
-               if (diff < minAngle) {
-                 joinTo = endNode;
-                 minAngle = diff;
-               }
-             });
-             /* Threshold set by considering right angle triangle
-             based on node joining threshold and extension distance */
+         function layerOn() {
+           editOn();
+           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             return dispatch.call('change');
+           });
+         } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-             if (minAngle <= SIG_ANGLE_TH) return joinTo;
-             return null;
-           }
 
-           function hasTag(tags, key) {
-             return tags[key] !== undefined && tags[key] !== 'no';
-           }
+         function layerOff() {
+           throttledRedraw.cancel();
+           drawLayer.interrupt();
+           touchLayer.selectAll('.qaItem.improveOSM').remove();
+           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             editOff();
+             dispatch.call('change');
+           });
+         } // Update the issue markers
 
-           function canConnectWays(way, way2) {
-             // allow self-connections
-             if (way.id === way2.id) return true; // if one is bridge or tunnel, both must be bridge or tunnel
 
-             if ((hasTag(way.tags, 'bridge') || hasTag(way2.tags, 'bridge')) && !(hasTag(way.tags, 'bridge') && hasTag(way2.tags, 'bridge'))) return false;
-             if ((hasTag(way.tags, 'tunnel') || hasTag(way2.tags, 'tunnel')) && !(hasTag(way.tags, 'tunnel') && hasTag(way2.tags, 'tunnel'))) return false; // must have equivalent layers and levels
+         function updateMarkers() {
+           if (!layerVisible || !_layerEnabled$1) return;
+           var service = getService();
+           var selectedID = context.selectedErrorID();
+           var data = service ? service.getItems(projection) : [];
+           var getTransform = svgPointTransform(projection); // Draw markers..
 
-             var layer1 = way.tags.layer || '0',
-                 layer2 = way2.tags.layer || '0';
-             if (layer1 !== layer2) return false;
-             var level1 = way.tags.level || '0',
-                 level2 = way2.tags.level || '0';
-             if (level1 !== level2) return false;
-             return true;
-           }
+           var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-           function canConnectByExtend(way, endNodeIdx) {
-             var tipNid = way.nodes[endNodeIdx]; // the 'tip' node for extension point
+           markers.exit().remove(); // enter
 
-             var midNid = endNodeIdx === 0 ? way.nodes[1] : way.nodes[way.nodes.length - 2]; // the other node of the edge
+           var markersEnter = markers.enter().append('g').attr('class', function (d) {
+             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           });
+           markersEnter.append('polygon').call(markerPath, 'shadow');
+           markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+           markersEnter.append('polygon').attr('fill', 'currentColor').call(markerPath, 'qaItem-fill');
+           markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+             var picon = d.icon;
 
-             var tipNode = graph.entity(tipNid);
-             var midNode = graph.entity(midNid);
-             var lon = tipNode.loc[0];
-             var lat = tipNode.loc[1];
-             var lon_range = geoMetersToLon(EXTEND_TH_METERS, lat) / 2;
-             var lat_range = geoMetersToLat(EXTEND_TH_METERS) / 2;
-             var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]); // first, extend the edge of [midNode -> tipNode] by EXTEND_TH_METERS and find the "extended tip" location
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
+             }
+           }); // update
 
-             var edgeLen = geoSphericalDistance(midNode.loc, tipNode.loc);
-             var t = EXTEND_TH_METERS / edgeLen + 1.0;
-             var extTipLoc = geoVecInterp(midNode.loc, tipNode.loc, t); // then, check if the extension part [tipNode.loc -> extTipLoc] intersects any other ways
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
-             var segmentInfos = tree.waySegments(queryExtent, graph);
+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var targets = touchLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-             for (var i = 0; i < segmentInfos.length; i++) {
-               var segmentInfo = segmentInfos[i];
-               var way2 = graph.entity(segmentInfo.wayId);
-               if (!isHighway(way2)) continue;
-               if (!canConnectWays(way, way2)) continue;
-               var nAid = segmentInfo.nodes[0],
-                   nBid = segmentInfo.nodes[1];
-               if (nAid === tipNid || nBid === tipNid) continue;
-               var nA = graph.entity(nAid),
-                   nB = graph.entity(nBid);
-               var crossLoc = geoLineIntersection([tipNode.loc, extTipLoc], [nA.loc, nB.loc]);
+           targets.exit().remove(); // enter/update
 
-               if (crossLoc) {
-                 return {
-                   mid: midNode,
-                   node: tipNode,
-                   wid: way2.id,
-                   edge: [nA.id, nB.id],
-                   cross_loc: crossLoc
-                 };
-               }
-             }
+           targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+           }).attr('transform', getTransform);
 
-             return null;
+           function sortY(a, b) {
+             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
            }
-         };
+         } // Draw the ImproveOSM layer and schedule loading issues and updating markers.
 
-         validation.type = type;
-         return validation;
-       }
 
-       function validationCloseNodes(context) {
-         var type = 'close_nodes';
-         var pointThresholdMeters = 0.2;
+         function drawImproveOSM(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-         var validation = function validation(entity, graph) {
-           if (entity.type === 'node') {
-             return getIssuesForNode(entity);
-           } else if (entity.type === 'way') {
-             return getIssuesForWay(entity);
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
            }
 
-           return [];
-
-           function getIssuesForNode(node) {
-             var parentWays = graph.parentWays(node);
+           drawLayer = selection.selectAll('.layer-improveOSM').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-improveOSM').style('display', _layerEnabled$1 ? 'block' : 'none').merge(drawLayer);
 
-             if (parentWays.length) {
-               return getIssuesForVertex(node, parentWays);
+           if (_layerEnabled$1) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
              } else {
-               return getIssuesForDetachedPoint(node);
+               editOff();
              }
            }
+         } // Toggles the layer on and off
 
-           function wayTypeFor(way) {
-             if (way.tags.boundary && way.tags.boundary !== 'no') return 'boundary';
-             if (way.tags.indoor && way.tags.indoor !== 'no') return 'indoor';
-             if (way.tags.building && way.tags.building !== 'no' || way.tags['building:part'] && way.tags['building:part'] !== 'no') return 'building';
-             if (osmPathHighwayTagValues[way.tags.highway]) return 'path';
-             var parentRelations = graph.parentRelations(way);
 
-             for (var i in parentRelations) {
-               var relation = parentRelations[i];
-               if (relation.tags.type === 'boundary') return 'boundary';
+         drawImproveOSM.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled$1;
+           _layerEnabled$1 = val;
 
-               if (relation.isMultipolygon()) {
-                 if (relation.tags.indoor && relation.tags.indoor !== 'no') return 'indoor';
-                 if (relation.tags.building && relation.tags.building !== 'no' || relation.tags['building:part'] && relation.tags['building:part'] !== 'no') return 'building';
-               }
-             }
+           if (_layerEnabled$1) {
+             layerOn();
+           } else {
+             layerOff();
 
-             return 'other';
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
+             }
            }
 
-           function shouldCheckWay(way) {
-             // don't flag issues where merging would create degenerate ways
-             if (way.nodes.length <= 2 || way.isClosed() && way.nodes.length <= 4) return false;
-             var bbox = way.extent(graph).bbox();
-             var hypotenuseMeters = geoSphericalDistance([bbox.minX, bbox.minY], [bbox.maxX, bbox.maxY]); // don't flag close nodes in very small ways
+           dispatch.call('change');
+           return this;
+         };
 
-             if (hypotenuseMeters < 1.5) return false;
-             return true;
-           }
+         drawImproveOSM.supported = function () {
+           return !!getService();
+         };
 
-           function getIssuesForWay(way) {
-             if (!shouldCheckWay(way)) return [];
-             var issues = [],
-                 nodes = graph.childNodes(way);
+         return drawImproveOSM;
+       }
 
-             for (var i = 0; i < nodes.length - 1; i++) {
-               var node1 = nodes[i];
-               var node2 = nodes[i + 1];
-               var issue = getWayIssueIfAny(node1, node2, way);
-               if (issue) issues.push(issue);
-             }
+       var _layerEnabled = false;
 
-             return issues;
-           }
+       var _qaService;
 
-           function getIssuesForVertex(node, parentWays) {
-             var issues = [];
+       function svgOsmose(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           return dispatch.call('change');
+         }, 1000);
 
-             function checkForCloseness(node1, node2, way) {
-               var issue = getWayIssueIfAny(node1, node2, way);
-               if (issue) issues.push(issue);
-             }
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var layerVisible = false;
 
-             for (var i = 0; i < parentWays.length; i++) {
-               var parentWay = parentWays[i];
-               if (!shouldCheckWay(parentWay)) continue;
-               var lastIndex = parentWay.nodes.length - 1;
+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+         } // Loosely-coupled osmose service for fetching issues
 
-               for (var j = 0; j < parentWay.nodes.length; j++) {
-                 if (j !== 0) {
-                   if (parentWay.nodes[j - 1] === node.id) {
-                     checkForCloseness(node, graph.entity(parentWay.nodes[j]), parentWay);
-                   }
-                 }
 
-                 if (j !== lastIndex) {
-                   if (parentWay.nodes[j + 1] === node.id) {
-                     checkForCloseness(graph.entity(parentWay.nodes[j]), node, parentWay);
-                   }
-                 }
-               }
-             }
+         function getService() {
+           if (services.osmose && !_qaService) {
+             _qaService = services.osmose;
 
-             return issues;
+             _qaService.on('loaded', throttledRedraw);
+           } else if (!services.osmose && _qaService) {
+             _qaService = null;
            }
 
-           function thresholdMetersForWay(way) {
-             if (!shouldCheckWay(way)) return 0;
-             var wayType = wayTypeFor(way); // don't flag boundaries since they might be highly detailed and can't be easily verified
+           return _qaService;
+         } // Show the markers
 
-             if (wayType === 'boundary') return 0; // expect some features to be mapped with higher levels of detail
 
-             if (wayType === 'indoor') return 0.01;
-             if (wayType === 'building') return 0.05;
-             if (wayType === 'path') return 0.1;
-             return 0.2;
+         function editOn() {
+           if (!layerVisible) {
+             layerVisible = true;
+             drawLayer.style('display', 'block');
            }
+         } // Immediately remove the markers and their touch targets
 
-           function getIssuesForDetachedPoint(node) {
-             var issues = [];
-             var lon = node.loc[0];
-             var lat = node.loc[1];
-             var lon_range = geoMetersToLon(pointThresholdMeters, lat) / 2;
-             var lat_range = geoMetersToLat(pointThresholdMeters) / 2;
-             var queryExtent = geoExtent([[lon - lon_range, lat - lat_range], [lon + lon_range, lat + lat_range]]);
-             var intersected = context.history().tree().intersects(queryExtent, graph);
 
-             for (var j = 0; j < intersected.length; j++) {
-               var nearby = intersected[j];
-               if (nearby.id === node.id) continue;
-               if (nearby.type !== 'node' || nearby.geometry(graph) !== 'point') continue;
+         function editOff() {
+           if (layerVisible) {
+             layerVisible = false;
+             drawLayer.style('display', 'none');
+             drawLayer.selectAll('.qaItem.osmose').remove();
+             touchLayer.selectAll('.qaItem.osmose').remove();
+           }
+         } // Enable the layer.  This shows the markers and transitions them to visible.
 
-               if (nearby.loc === node.loc || geoSphericalDistance(node.loc, nearby.loc) < pointThresholdMeters) {
-                 // allow very close points if tags indicate the z-axis might vary
-                 var zAxisKeys = {
-                   layer: true,
-                   level: true,
-                   'addr:housenumber': true,
-                   'addr:unit': true
-                 };
-                 var zAxisDifferentiates = false;
 
-                 for (var key in zAxisKeys) {
-                   var nodeValue = node.tags[key] || '0';
-                   var nearbyValue = nearby.tags[key] || '0';
+         function layerOn() {
+           editOn();
+           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             return dispatch.call('change');
+           });
+         } // Disable the layer.  This transitions the layer invisible and then hides the markers.
 
-                   if (nodeValue !== nearbyValue) {
-                     zAxisDifferentiates = true;
-                     break;
-                   }
-                 }
 
-                 if (zAxisDifferentiates) continue;
-                 issues.push(new validationIssue({
-                   type: type,
-                   subtype: 'detached',
-                   severity: 'warning',
-                   message: function message(context) {
-                     var entity = context.hasEntity(this.entityIds[0]),
-                         entity2 = context.hasEntity(this.entityIds[1]);
-                     return entity && entity2 ? _t.html('issues.close_nodes.detached.message', {
-                       feature: utilDisplayLabel(entity, context.graph()),
-                       feature2: utilDisplayLabel(entity2, context.graph())
-                     }) : '';
-                   },
-                   reference: showReference,
-                   entityIds: [node.id, nearby.id],
-                   dynamicFixes: function dynamicFixes() {
-                     return [new validationIssueFix({
-                       icon: 'iD-operation-disconnect',
-                       title: _t.html('issues.fix.move_points_apart.title')
-                     }), new validationIssueFix({
-                       icon: 'iD-icon-layers',
-                       title: _t.html('issues.fix.use_different_layers_or_levels.title')
-                     })];
-                   }
-                 }));
-               }
-             }
+         function layerOff() {
+           throttledRedraw.cancel();
+           drawLayer.interrupt();
+           touchLayer.selectAll('.qaItem.osmose').remove();
+           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             editOff();
+             dispatch.call('change');
+           });
+         } // Update the issue markers
 
-             return issues;
 
-             function showReference(selection) {
-               var referenceText = _t('issues.close_nodes.detached.reference');
-               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
-             }
-           }
+         function updateMarkers() {
+           if (!layerVisible || !_layerEnabled) return;
+           var service = getService();
+           var selectedID = context.selectedErrorID();
+           var data = service ? service.getItems(projection) : [];
+           var getTransform = svgPointTransform(projection); // Draw markers..
 
-           function getWayIssueIfAny(node1, node2, way) {
-             if (node1.id === node2.id || node1.hasInterestingTags() && node2.hasInterestingTags()) {
-               return null;
-             }
+           var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-             if (node1.loc !== node2.loc) {
-               var parentWays1 = graph.parentWays(node1);
-               var parentWays2 = new Set(graph.parentWays(node2));
-               var sharedWays = parentWays1.filter(function (parentWay) {
-                 return parentWays2.has(parentWay);
-               });
-               var thresholds = sharedWays.map(function (parentWay) {
-                 return thresholdMetersForWay(parentWay);
-               });
-               var threshold = Math.min.apply(Math, _toConsumableArray(thresholds));
-               var distance = geoSphericalDistance(node1.loc, node2.loc);
-               if (distance > threshold) return null;
-             }
+           markers.exit().remove(); // enter
 
-             return new validationIssue({
-               type: type,
-               subtype: 'vertices',
-               severity: 'warning',
-               message: function message(context) {
-                 var entity = context.hasEntity(this.entityIds[0]);
-                 return entity ? _t.html('issues.close_nodes.message', {
-                   way: utilDisplayLabel(entity, context.graph())
-                 }) : '';
-               },
-               reference: showReference,
-               entityIds: [way.id, node1.id, node2.id],
-               loc: node1.loc,
-               dynamicFixes: function dynamicFixes() {
-                 return [new validationIssueFix({
-                   icon: 'iD-icon-plus',
-                   title: _t.html('issues.fix.merge_points.title'),
-                   onClick: function onClick(context) {
-                     var entityIds = this.issue.entityIds;
-                     var action = actionMergeNodes([entityIds[1], entityIds[2]]);
-                     context.perform(action, _t('issues.fix.merge_close_vertices.annotation'));
-                   }
-                 }), new validationIssueFix({
-                   icon: 'iD-operation-disconnect',
-                   title: _t.html('issues.fix.move_points_apart.title')
-                 })];
-               }
-             });
+           var markersEnter = markers.enter().append('g').attr('class', function (d) {
+             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           });
+           markersEnter.append('polygon').call(markerPath, 'shadow');
+           markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
+           markersEnter.append('polygon').attr('fill', function (d) {
+             return service.getColor(d.item);
+           }).call(markerPath, 'qaItem-fill');
+           markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
+             var picon = d.icon;
 
-             function showReference(selection) {
-               var referenceText = _t('issues.close_nodes.reference');
-               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(referenceText);
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
+           }); // update
+
+           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
+             return d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
+
+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
+           var targets = touchLayer.selectAll('.qaItem.osmose').data(data, function (d) {
+             return d.id;
+           }); // exit
+
+           targets.exit().remove(); // enter/update
+
+           targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
+             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
+           }).attr('transform', getTransform);
+
+           function sortY(a, b) {
+             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
            }
-         };
+         } // Draw the Osmose layer and schedule loading issues and updating markers.
 
-         validation.type = type;
-         return validation;
-       }
 
-       function validationCrossingWays(context) {
-         var type = 'crossing_ways'; // returns the way or its parent relation, whichever has a useful feature type
+         function drawOsmose(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-         function getFeatureWithFeatureTypeTagsForWay(way, graph) {
-           if (getFeatureType(way, graph) === null) {
-             // if the way doesn't match a feature type, check its parent relations
-             var parentRels = graph.parentRelations(way);
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
-             for (var i = 0; i < parentRels.length; i++) {
-               var rel = parentRels[i];
+           drawLayer = selection.selectAll('.layer-osmose').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-osmose').style('display', _layerEnabled ? 'block' : 'none').merge(drawLayer);
 
-               if (getFeatureType(rel, graph) !== null) {
-                 return rel;
-               }
+           if (_layerEnabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadIssues(projection);
+               updateMarkers();
+             } else {
+               editOff();
              }
            }
+         } // Toggles the layer on and off
 
-           return way;
-         }
-
-         function hasTag(tags, key) {
-           return tags[key] !== undefined && tags[key] !== 'no';
-         }
-
-         function taggedAsIndoor(tags) {
-           return hasTag(tags, 'indoor') || hasTag(tags, 'level') || tags.highway === 'corridor';
-         }
 
-         function allowsBridge(featureType) {
-           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-         }
+         drawOsmose.enabled = function (val) {
+           if (!arguments.length) return _layerEnabled;
+           _layerEnabled = val;
 
-         function allowsTunnel(featureType) {
-           return featureType === 'highway' || featureType === 'railway' || featureType === 'waterway';
-         } // discard
+           if (_layerEnabled) {
+             // Strings supplied by Osmose fetched before showing layer for first time
+             // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
+             // Also, If layer is toggled quickly multiple requests are sent
+             getService().loadStrings().then(layerOn)["catch"](function (err) {
+               console.log(err); // eslint-disable-line no-console
+             });
+           } else {
+             layerOff();
 
+             if (context.selectedErrorID()) {
+               context.enter(modeBrowse(context));
+             }
+           }
 
-         var ignoredBuildings = {
-           demolished: true,
-           dismantled: true,
-           proposed: true,
-           razed: true
+           dispatch.call('change');
+           return this;
          };
 
-         function getFeatureType(entity, graph) {
-           var geometry = entity.geometry(graph);
-           if (geometry !== 'line' && geometry !== 'area') return null;
-           var tags = entity.tags;
-           if (hasTag(tags, 'building') && !ignoredBuildings[tags.building]) return 'building';
-           if (hasTag(tags, 'highway') && osmRoutableHighwayTagValues[tags.highway]) return 'highway'; // don't check railway or waterway areas
-
-           if (geometry !== 'line') return null;
-           if (hasTag(tags, 'railway') && osmRailwayTrackTagValues[tags.railway]) return 'railway';
-           if (hasTag(tags, 'waterway') && osmFlowingWaterwayTagValues[tags.waterway]) return 'waterway';
-           return null;
-         }
-
-         function isLegitCrossing(tags1, featureType1, tags2, featureType2) {
-           // assume 0 by default
-           var level1 = tags1.level || '0';
-           var level2 = tags2.level || '0';
+         drawOsmose.supported = function () {
+           return !!getService();
+         };
 
-           if (taggedAsIndoor(tags1) && taggedAsIndoor(tags2) && level1 !== level2) {
-             // assume features don't interact if they're indoor on different levels
-             return true;
-           } // assume 0 by default; don't use way.layer() since we account for structures here
+         return drawOsmose;
+       }
 
+       function svgStreetside(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-           var layer1 = tags1.layer || '0';
-           var layer2 = tags2.layer || '0';
+         var minZoom = 14;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
+         var _viewerYaw = 0;
+         var _selectedSequence = null;
 
-           if (allowsBridge(featureType1) && allowsBridge(featureType2)) {
-             if (hasTag(tags1, 'bridge') && !hasTag(tags2, 'bridge')) return true;
-             if (!hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge')) return true; // crossing bridges must use different layers
+         var _streetside;
+         /**
+          * init().
+          */
 
-             if (hasTag(tags1, 'bridge') && hasTag(tags2, 'bridge') && layer1 !== layer2) return true;
-           } else if (allowsBridge(featureType1) && hasTag(tags1, 'bridge')) return true;else if (allowsBridge(featureType2) && hasTag(tags2, 'bridge')) return true;
 
-           if (allowsTunnel(featureType1) && allowsTunnel(featureType2)) {
-             if (hasTag(tags1, 'tunnel') && !hasTag(tags2, 'tunnel')) return true;
-             if (!hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel')) return true; // crossing tunnels must use different layers
+         function init() {
+           if (svgStreetside.initialized) return; // run once
 
-             if (hasTag(tags1, 'tunnel') && hasTag(tags2, 'tunnel') && layer1 !== layer2) return true;
-           } else if (allowsTunnel(featureType1) && hasTag(tags1, 'tunnel')) return true;else if (allowsTunnel(featureType2) && hasTag(tags2, 'tunnel')) return true; // don't flag crossing waterways and pier/highways
+           svgStreetside.enabled = false;
+           svgStreetside.initialized = true;
+         }
+         /**
+          * getService().
+          */
 
 
-           if (featureType1 === 'waterway' && featureType2 === 'highway' && tags2.man_made === 'pier') return true;
-           if (featureType2 === 'waterway' && featureType1 === 'highway' && tags1.man_made === 'pier') return true;
+         function getService() {
+           if (services.streetside && !_streetside) {
+             _streetside = services.streetside;
 
-           if (featureType1 === 'building' || featureType2 === 'building') {
-             // for building crossings, different layers are enough
-             if (layer1 !== layer2) return true;
+             _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
+           } else if (!services.streetside && _streetside) {
+             _streetside = null;
            }
 
-           return false;
-         } // highway values for which we shouldn't recommend connecting to waterways
+           return _streetside;
+         }
+         /**
+          * showLayer().
+          */
 
 
-         var highwaysDisallowingFords = {
-           motorway: true,
-           motorway_link: true,
-           trunk: true,
-           trunk_link: true,
-           primary: true,
-           primary_link: true,
-           secondary: true,
-           secondary_link: true
-         };
-         var nonCrossingHighways = {
-           track: true
-         };
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           editOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');
+           });
+         }
+         /**
+          * hideLayer().
+          */
 
-         function tagsForConnectionNodeIfAllowed(entity1, entity2, graph) {
-           var featureType1 = getFeatureType(entity1, graph);
-           var featureType2 = getFeatureType(entity2, graph);
-           var geometry1 = entity1.geometry(graph);
-           var geometry2 = entity2.geometry(graph);
-           var bothLines = geometry1 === 'line' && geometry2 === 'line';
 
-           if (featureType1 === featureType2) {
-             if (featureType1 === 'highway') {
-               var entity1IsPath = osmPathHighwayTagValues[entity1.tags.highway];
-               var entity2IsPath = osmPathHighwayTagValues[entity2.tags.highway];
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+         }
+         /**
+          * editOn().
+          */
 
-               if ((entity1IsPath || entity2IsPath) && entity1IsPath !== entity2IsPath) {
-                 // one feature is a path but not both
-                 var roadFeature = entity1IsPath ? entity2 : entity1;
 
-                 if (nonCrossingHighways[roadFeature.tags.highway]) {
-                   // don't mark path connections with certain roads as crossings
-                   return {};
-                 }
+         function editOn() {
+           layer.style('display', 'block');
+         }
+         /**
+          * editOff().
+          */
 
-                 var pathFeature = entity1IsPath ? entity1 : entity2;
 
-                 if (['marked', 'unmarked'].indexOf(pathFeature.tags.crossing) !== -1) {
-                   // if the path is a crossing, match the crossing type
-                   return bothLines ? {
-                     highway: 'crossing',
-                     crossing: pathFeature.tags.crossing
-                   } : {};
-                 } // don't add a `crossing` subtag to ambiguous crossings
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
+         /**
+          * click() Handles 'bubble' point click event.
+          */
 
 
-                 return bothLines ? {
-                   highway: 'crossing'
-                 } : {};
-               }
+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
 
-               return {};
-             }
+           if (d.sequenceKey !== _selectedSequence) {
+             _viewerYaw = 0; // reset
+           }
 
-             if (featureType1 === 'waterway') return {};
-             if (featureType1 === 'railway') return {};
-           } else {
-             var featureTypes = [featureType1, featureType2];
+           _selectedSequence = d.sequenceKey;
+           service.ensureViewerLoaded(context).then(function () {
+             service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+           });
+           context.map().centerEase(d.loc);
+         }
+         /**
+          * mouseover().
+          */
 
-             if (featureTypes.indexOf('highway') !== -1) {
-               if (featureTypes.indexOf('railway') !== -1) {
-                 if (!bothLines) return {};
-                 var isTram = entity1.tags.railway === 'tram' || entity2.tags.railway === 'tram';
 
-                 if (osmPathHighwayTagValues[entity1.tags.highway] || osmPathHighwayTagValues[entity2.tags.highway]) {
-                   // path-tram connections use this tag
-                   if (isTram) return {
-                     railway: 'tram_crossing'
-                   }; // other path-rail connections use this tag
+         function mouseover(d3_event, d) {
+           var service = getService();
+           if (service) service.setStyles(context, d);
+         }
+         /**
+          * mouseout().
+          */
 
-                   return {
-                     railway: 'crossing'
-                   };
-                 } else {
-                   // path-tram connections use this tag
-                   if (isTram) return {
-                     railway: 'tram_level_crossing'
-                   }; // other road-rail connections use this tag
 
-                   return {
-                     railway: 'level_crossing'
-                   };
-                 }
-               }
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }
+         /**
+          * transform().
+          */
 
-               if (featureTypes.indexOf('waterway') !== -1) {
-                 // do not allow fords on structures
-                 if (hasTag(entity1.tags, 'tunnel') && hasTag(entity2.tags, 'tunnel')) return null;
-                 if (hasTag(entity1.tags, 'bridge') && hasTag(entity2.tags, 'bridge')) return null;
 
-                 if (highwaysDisallowingFords[entity1.tags.highway] || highwaysDisallowingFords[entity2.tags.highway]) {
-                   // do not allow fords on major highways
-                   return null;
-                 }
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
+           var rot = d.ca + _viewerYaw;
 
-                 return bothLines ? {
-                   ford: 'yes'
-                 } : {};
-               }
-             }
+           if (rot) {
+             t += ' rotate(' + Math.floor(rot) + ',0,0)';
            }
 
-           return null;
+           return t;
          }
 
-         function findCrossingsByWay(way1, graph, tree) {
-           var edgeCrossInfos = [];
-           if (way1.type !== 'way') return edgeCrossInfos;
-           var taggedFeature1 = getFeatureWithFeatureTypeTagsForWay(way1, graph);
-           var way1FeatureType = getFeatureType(taggedFeature1, graph);
-           if (way1FeatureType === null) return edgeCrossInfos;
-           var checkedSingleCrossingWays = {}; // declare vars ahead of time to reduce garbage collection
-
-           var i, j;
-           var extent;
-           var n1, n2, nA, nB, nAId, nBId;
-           var segment1, segment2;
-           var oneOnly;
-           var segmentInfos, segment2Info, way2, taggedFeature2, way2FeatureType;
-           var way1Nodes = graph.childNodes(way1);
-           var comparedWays = {};
-
-           for (i = 0; i < way1Nodes.length - 1; i++) {
-             n1 = way1Nodes[i];
-             n2 = way1Nodes[i + 1];
-             extent = geoExtent([[Math.min(n1.loc[0], n2.loc[0]), Math.min(n1.loc[1], n2.loc[1])], [Math.max(n1.loc[0], n2.loc[0]), Math.max(n1.loc[1], n2.loc[1])]]); // Optimize by only checking overlapping segments, not every segment
-             // of overlapping ways
-
-             segmentInfos = tree.waySegments(extent, graph);
-
-             for (j = 0; j < segmentInfos.length; j++) {
-               segment2Info = segmentInfos[j]; // don't check for self-intersection in this validation
+         function viewerChanged() {
+           var service = getService();
+           if (!service) return;
+           var viewer = service.viewer();
+           if (!viewer) return; // update viewfield rotation
 
-               if (segment2Info.wayId === way1.id) continue; // skip if this way was already checked and only one issue is needed
+           _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
+           // e.g. during drags or easing.
 
-               if (checkedSingleCrossingWays[segment2Info.wayId]) continue; // mark this way as checked even if there are no crossings
+           if (context.map().isTransformed()) return;
+           layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
+         }
 
-               comparedWays[segment2Info.wayId] = true;
-               way2 = graph.hasEntity(segment2Info.wayId);
-               if (!way2) continue;
-               taggedFeature2 = getFeatureWithFeatureTypeTagsForWay(way2, graph); // only check crossing highway, waterway, building, and railway
+         function filterBubbles(bubbles) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-               way2FeatureType = getFeatureType(taggedFeature2, graph);
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             bubbles = bubbles.filter(function (bubble) {
+               return new Date(bubble.captured_at).getTime() >= fromTimestamp;
+             });
+           }
 
-               if (way2FeatureType === null || isLegitCrossing(taggedFeature1.tags, way1FeatureType, taggedFeature2.tags, way2FeatureType)) {
-                 continue;
-               } // create only one issue for building crossings
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             bubbles = bubbles.filter(function (bubble) {
+               return new Date(bubble.captured_at).getTime() <= toTimestamp;
+             });
+           }
 
+           if (usernames) {
+             bubbles = bubbles.filter(function (bubble) {
+               return usernames.indexOf(bubble.captured_by) !== -1;
+             });
+           }
 
-               oneOnly = way1FeatureType === 'building' || way2FeatureType === 'building';
-               nAId = segment2Info.nodes[0];
-               nBId = segment2Info.nodes[1];
+           return bubbles;
+         }
 
-               if (nAId === n1.id || nAId === n2.id || nBId === n1.id || nBId === n2.id) {
-                 // n1 or n2 is a connection node; skip
-                 continue;
-               }
+         function filterSequences(sequences) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-               nA = graph.hasEntity(nAId);
-               if (!nA) continue;
-               nB = graph.hasEntity(nBId);
-               if (!nB) continue;
-               segment1 = [n1.loc, n2.loc];
-               segment2 = [nA.loc, nB.loc];
-               var point = geoLineIntersection(segment1, segment2);
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             sequences = sequences.filter(function (sequences) {
+               return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
+             });
+           }
 
-               if (point) {
-                 edgeCrossInfos.push({
-                   wayInfos: [{
-                     way: way1,
-                     featureType: way1FeatureType,
-                     edge: [n1.id, n2.id]
-                   }, {
-                     way: way2,
-                     featureType: way2FeatureType,
-                     edge: [nA.id, nB.id]
-                   }],
-                   crossPoint: point
-                 });
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             sequences = sequences.filter(function (sequences) {
+               return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
+             });
+           }
 
-                 if (oneOnly) {
-                   checkedSingleCrossingWays[way2.id] = true;
-                   break;
-                 }
-               }
-             }
+           if (usernames) {
+             sequences = sequences.filter(function (sequences) {
+               return usernames.indexOf(sequences.properties.captured_by) !== -1;
+             });
            }
 
-           return edgeCrossInfos;
+           return sequences;
          }
+         /**
+          * update().
+          */
 
-         function waysToCheck(entity, graph) {
-           var featureType = getFeatureType(entity, graph);
-           if (!featureType) return [];
-
-           if (entity.type === 'way') {
-             return [entity];
-           } else if (entity.type === 'relation') {
-             return entity.members.reduce(function (array, member) {
-               if (member.type === 'way' && ( // only look at geometry ways
-               !member.role || member.role === 'outer' || member.role === 'inner')) {
-                 var entity = graph.hasEntity(member.id); // don't add duplicates
 
-                 if (entity && array.indexOf(entity) === -1) {
-                   array.push(entity);
-                 }
-               }
+         function update() {
+           var viewer = context.container().select('.photoviewer');
+           var selected = viewer.empty() ? undefined : viewer.datum();
+           var z = ~~context.map().zoom();
+           var showMarkers = z >= minMarkerZoom;
+           var showViewfields = z >= minViewfieldZoom;
+           var service = getService();
+           var sequences = [];
+           var bubbles = [];
 
-               return array;
-             }, []);
+           if (context.photos().showsPanoramic()) {
+             sequences = service ? service.sequences(projection) : [];
+             bubbles = service && showMarkers ? service.bubbles(projection) : [];
+             sequences = filterSequences(sequences);
+             bubbles = filterBubbles(bubbles);
            }
 
-           return [];
-         }
+           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+             return d.properties.key;
+           }); // exit
 
-         var validation = function checkCrossingWays(entity, graph) {
-           var tree = context.history().tree();
-           var ways = waysToCheck(entity, graph);
-           var issues = []; // declare these here to reduce garbage collection
+           traces.exit().remove(); // enter/update
 
-           var wayIndex, crossingIndex, crossings;
+           traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(bubbles, function (d) {
+             // force reenter once bubbles are attached to a sequence
+             return d.key + (d.sequenceKey ? 'v1' : 'v0');
+           }); // exit
 
-           for (wayIndex in ways) {
-             crossings = findCrossingsByWay(ways[wayIndex], graph, tree);
+           groups.exit().remove(); // enter
 
-             for (crossingIndex in crossings) {
-               issues.push(createIssue(crossings[crossingIndex], graph));
-             }
-           }
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-           return issues;
-         };
+           var markers = groups.merge(groupsEnter).sort(function (a, b) {
+             return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1];
+           }).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove(); // viewfields may or may not be drawn...
+           // but if they are, draw below the circles
 
-         function createIssue(crossing, graph) {
-           // use the entities with the tags that define the feature type
-           crossing.wayInfos.sort(function (way1Info, way2Info) {
-             var type1 = way1Info.featureType;
-             var type2 = way2Info.featureType;
+           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
-             if (type1 === type2) {
-               return utilDisplayLabel(way1Info.way, graph) > utilDisplayLabel(way2Info.way, graph);
-             } else if (type1 === 'waterway') {
-               return true;
-             } else if (type2 === 'waterway') {
-               return false;
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;
+
+             if (d.pano) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
              }
+           }
+         }
+         /**
+          * drawImages()
+          * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
+          * 'svgStreetside()' is called from index.js
+          */
 
-             return type1 < type2;
-           });
-           var entities = crossing.wayInfos.map(function (wayInfo) {
-             return getFeatureWithFeatureTypeTagsForWay(wayInfo.way, graph);
-           });
-           var edges = [crossing.wayInfos[0].edge, crossing.wayInfos[1].edge];
-           var featureTypes = [crossing.wayInfos[0].featureType, crossing.wayInfos[1].featureType];
-           var connectionTags = tagsForConnectionNodeIfAllowed(entities[0], entities[1], graph);
-           var featureType1 = crossing.wayInfos[0].featureType;
-           var featureType2 = crossing.wayInfos[1].featureType;
-           var isCrossingIndoors = taggedAsIndoor(entities[0].tags) && taggedAsIndoor(entities[1].tags);
-           var isCrossingTunnels = allowsTunnel(featureType1) && hasTag(entities[0].tags, 'tunnel') && allowsTunnel(featureType2) && hasTag(entities[1].tags, 'tunnel');
-           var isCrossingBridges = allowsBridge(featureType1) && hasTag(entities[0].tags, 'bridge') && allowsBridge(featureType2) && hasTag(entities[1].tags, 'bridge');
-           var subtype = [featureType1, featureType2].sort().join('-');
-           var crossingTypeID = subtype;
 
-           if (isCrossingIndoors) {
-             crossingTypeID = 'indoor-indoor';
-           } else if (isCrossingTunnels) {
-             crossingTypeID = 'tunnel-tunnel';
-           } else if (isCrossingBridges) {
-             crossingTypeID = 'bridge-bridge';
-           }
+         function drawImages(selection) {
+           var enabled = svgStreetside.enabled;
+           var service = getService();
+           layer = selection.selectAll('.layer-streetside-images').data(service ? [0] : []);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-streetside-images').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'sequences');
+           layerEnter.append('g').attr('class', 'markers');
+           layer = layerEnter.merge(layer);
 
-           if (connectionTags && (isCrossingIndoors || isCrossingTunnels || isCrossingBridges)) {
-             crossingTypeID += '_connectable';
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadBubbles(projection);
+             } else {
+               editOff();
+             }
            }
+         }
+         /**
+          * drawImages.enabled().
+          */
 
-           return new validationIssue({
-             type: type,
-             subtype: subtype,
-             severity: 'warning',
-             message: function message(context) {
-               var graph = context.graph();
-               var entity1 = graph.hasEntity(this.entityIds[0]),
-                   entity2 = graph.hasEntity(this.entityIds[1]);
-               return entity1 && entity2 ? _t.html('issues.crossing_ways.message', {
-                 feature: utilDisplayLabel(entity1, graph),
-                 feature2: utilDisplayLabel(entity2, graph)
-               }) : '';
-             },
-             reference: showReference,
-             entityIds: entities.map(function (entity) {
-               return entity.id;
-             }),
-             data: {
-               edges: edges,
-               featureTypes: featureTypes,
-               connectionTags: connectionTags
-             },
-             // differentiate based on the loc since two ways can cross multiple times
-             hash: crossing.crossPoint.toString() + // if the edges change then so does the fix
-             edges.slice().sort(function (edge1, edge2) {
-               // order to assure hash is deterministic
-               return edge1[0] < edge2[0] ? -1 : 1;
-             }).toString() + // ensure the correct connection tags are added in the fix
-             JSON.stringify(connectionTags),
-             loc: crossing.crossPoint,
-             dynamicFixes: function dynamicFixes(context) {
-               var mode = context.mode();
-               if (!mode || mode.id !== 'select' || mode.selectedIDs().length !== 1) return [];
-               var selectedIndex = this.entityIds[0] === mode.selectedIDs()[0] ? 0 : 1;
-               var selectedFeatureType = this.data.featureTypes[selectedIndex];
-               var otherFeatureType = this.data.featureTypes[selectedIndex === 0 ? 1 : 0];
-               var fixes = [];
 
-               if (connectionTags) {
-                 fixes.push(makeConnectWaysFix(this.data.connectionTags));
-               }
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgStreetside.enabled;
+           svgStreetside.enabled = _;
 
-               if (isCrossingIndoors) {
-                 fixes.push(new validationIssueFix({
-                   icon: 'iD-icon-layers',
-                   title: _t.html('issues.fix.use_different_levels.title')
-                 }));
-               } else if (isCrossingTunnels || isCrossingBridges || featureType1 === 'building' || featureType2 === 'building') {
-                 fixes.push(makeChangeLayerFix('higher'));
-                 fixes.push(makeChangeLayerFix('lower')); // can only add bridge/tunnel if both features are lines
-               } else if (context.graph().geometry(this.entityIds[0]) === 'line' && context.graph().geometry(this.entityIds[1]) === 'line') {
-                 // don't recommend adding bridges to waterways since they're uncommon
-                 if (allowsBridge(selectedFeatureType) && selectedFeatureType !== 'waterway') {
-                   fixes.push(makeAddBridgeOrTunnelFix('add_a_bridge', 'temaki-bridge', 'bridge'));
-                 } // don't recommend adding tunnels under waterways since they're uncommon
+           if (svgStreetside.enabled) {
+             showLayer();
+             context.photos().on('change.streetside', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.streetside', null);
+           }
 
+           dispatch.call('change');
+           return this;
+         };
+         /**
+          * drawImages.supported().
+          */
 
-                 var skipTunnelFix = otherFeatureType === 'waterway' && selectedFeatureType !== 'waterway';
 
-                 if (allowsTunnel(selectedFeatureType) && !skipTunnelFix) {
-                   fixes.push(makeAddBridgeOrTunnelFix('add_a_tunnel', 'temaki-tunnel', 'tunnel'));
-                 }
-               } // repositioning the features is always an option
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
+         init();
+         return drawImages;
+       }
 
-               fixes.push(new validationIssueFix({
-                 icon: 'iD-operation-move',
-                 title: _t.html('issues.fix.reposition_features.title')
-               }));
-               return fixes;
-             }
-           });
+       function svgMapillaryImages(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.crossing_ways.' + crossingTypeID + '.reference'));
-           }
-         }
+         var minZoom = 12;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
 
-         function makeAddBridgeOrTunnelFix(fixTitleID, iconName, bridgeOrTunnel) {
-           return new validationIssueFix({
-             icon: iconName,
-             title: _t.html('issues.fix.' + fixTitleID + '.title'),
-             onClick: function onClick(context) {
-               var mode = context.mode();
-               if (!mode || mode.id !== 'select') return;
-               var selectedIDs = mode.selectedIDs();
-               if (selectedIDs.length !== 1) return;
-               var selectedWayID = selectedIDs[0];
-               if (!context.hasEntity(selectedWayID)) return;
-               var resultWayIDs = [selectedWayID];
-               var edge, crossedEdge, crossedWayID;
+         var _mapillary;
 
-               if (this.issue.entityIds[0] === selectedWayID) {
-                 edge = this.issue.data.edges[0];
-                 crossedEdge = this.issue.data.edges[1];
-                 crossedWayID = this.issue.entityIds[1];
-               } else {
-                 edge = this.issue.data.edges[1];
-                 crossedEdge = this.issue.data.edges[0];
-                 crossedWayID = this.issue.entityIds[0];
-               }
+         function init() {
+           if (svgMapillaryImages.initialized) return; // run once
 
-               var crossingLoc = this.issue.loc;
-               var projection = context.projection;
+           svgMapillaryImages.enabled = false;
+           svgMapillaryImages.initialized = true;
+         }
 
-               var action = function actionAddStructure(graph) {
-                 var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
-                 var crossedWay = graph.hasEntity(crossedWayID); // use the explicit width of the crossed feature as the structure length, if available
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-                 var structLengthMeters = crossedWay && crossedWay.tags.width && parseFloat(crossedWay.tags.width);
+             _mapillary.event.on('loadedImages', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }
 
-                 if (!structLengthMeters) {
-                   // if no explicit width is set, approximate the width based on the tags
-                   structLengthMeters = crossedWay && crossedWay.impliedLineWidthMeters();
-                 }
+           return _mapillary;
+         }
 
-                 if (structLengthMeters) {
-                   if (getFeatureType(crossedWay, graph) === 'railway') {
-                     // bridges over railways are generally much longer than the rail bed itself, compensate
-                     structLengthMeters *= 2;
-                   }
-                 } else {
-                   // should ideally never land here since all rail/water/road tags should have an implied width
-                   structLengthMeters = 8;
-                 }
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           editOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');
+           });
+         }
 
-                 var a1 = geoAngle(edgeNodes[0], edgeNodes[1], projection) + Math.PI;
-                 var a2 = geoAngle(graph.entity(crossedEdge[0]), graph.entity(crossedEdge[1]), projection) + Math.PI;
-                 var crossingAngle = Math.max(a1, a2) - Math.min(a1, a2);
-                 if (crossingAngle > Math.PI) crossingAngle -= Math.PI; // lengthen the structure to account for the angle of the crossing
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
+         }
 
-                 structLengthMeters = structLengthMeters / 2 / Math.sin(crossingAngle) * 2; // add padding since the structure must extend past the edges of the crossed feature
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-                 structLengthMeters += 4; // clamp the length to a reasonable range
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
 
-                 structLengthMeters = Math.min(Math.max(structLengthMeters, 4), 50);
+         function click(d3_event, image) {
+           var service = getService();
+           if (!service) return;
+           service.ensureViewerLoaded(context).then(function () {
+             service.selectImage(context, image.id).showViewer(context);
+           });
+           context.map().centerEase(image.loc);
+         }
 
-                 function geomToProj(geoPoint) {
-                   return [geoLonToMeters(geoPoint[0], geoPoint[1]), geoLatToMeters(geoPoint[1])];
-                 }
+         function mouseover(d3_event, image) {
+           var service = getService();
+           if (service) service.setStyles(context, image);
+         }
 
-                 function projToGeom(projPoint) {
-                   var lat = geoMetersToLat(projPoint[1]);
-                   return [geoMetersToLon(projPoint[0], lat), lat];
-                 }
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }
 
-                 var projEdgeNode1 = geomToProj(edgeNodes[0].loc);
-                 var projEdgeNode2 = geomToProj(edgeNodes[1].loc);
-                 var projectedAngle = geoVecAngle(projEdgeNode1, projEdgeNode2);
-                 var projectedCrossingLoc = geomToProj(crossingLoc);
-                 var linearToSphericalMetersRatio = geoVecLength(projEdgeNode1, projEdgeNode2) / geoSphericalDistance(edgeNodes[0].loc, edgeNodes[1].loc);
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
 
-                 function locSphericalDistanceFromCrossingLoc(angle, distanceMeters) {
-                   var lengthSphericalMeters = distanceMeters * linearToSphericalMetersRatio;
-                   return projToGeom([projectedCrossingLoc[0] + Math.cos(angle) * lengthSphericalMeters, projectedCrossingLoc[1] + Math.sin(angle) * lengthSphericalMeters]);
-                 }
+           if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+           }
 
-                 var endpointLocGetter1 = function endpointLocGetter1(lengthMeters) {
-                   return locSphericalDistanceFromCrossingLoc(projectedAngle, lengthMeters);
-                 };
+           return t;
+         }
 
-                 var endpointLocGetter2 = function endpointLocGetter2(lengthMeters) {
-                   return locSphericalDistanceFromCrossingLoc(projectedAngle + Math.PI, lengthMeters);
-                 }; // avoid creating very short edges from splitting too close to another node
+         function filterImages(images) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
 
+           if (!showsPano || !showsFlat) {
+             images = images.filter(function (image) {
+               if (image.is_pano) return showsPano;
+               return showsFlat;
+             });
+           }
 
-                 var minEdgeLengthMeters = 0.55; // decide where to bound the structure along the way, splitting as necessary
+           if (fromDate) {
+             images = images.filter(function (image) {
+               return new Date(image.captured_at).getTime() >= new Date(fromDate).getTime();
+             });
+           }
 
-                 function determineEndpoint(edge, endNode, locGetter) {
-                   var newNode;
-                   var idealLengthMeters = structLengthMeters / 2; // distance between the crossing location and the end of the edge,
-                   // the maximum length of this side of the structure
+           if (toDate) {
+             images = images.filter(function (image) {
+               return new Date(image.captured_at).getTime() <= new Date(toDate).getTime();
+             });
+           }
 
-                   var crossingToEdgeEndDistance = geoSphericalDistance(crossingLoc, endNode.loc);
+           return images;
+         }
 
-                   if (crossingToEdgeEndDistance - idealLengthMeters > minEdgeLengthMeters) {
-                     // the edge is long enough to insert a new node
-                     // the loc that would result in the full expected length
-                     var idealNodeLoc = locGetter(idealLengthMeters);
-                     newNode = osmNode();
-                     graph = actionAddMidpoint({
-                       loc: idealNodeLoc,
-                       edge: edge
-                     }, newNode)(graph);
-                   } else {
-                     var edgeCount = 0;
-                     endNode.parentIntersectionWays(graph).forEach(function (way) {
-                       way.nodes.forEach(function (nodeID) {
-                         if (nodeID === endNode.id) {
-                           if (endNode.id === way.first() && endNode.id !== way.last() || endNode.id === way.last() && endNode.id !== way.first()) {
-                             edgeCount += 1;
-                           } else {
-                             edgeCount += 2;
-                           }
-                         }
-                       });
-                     });
+         function filterSequences(sequences) {
+           var showsPano = context.photos().showsPanoramic();
+           var showsFlat = context.photos().showsFlat();
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
 
-                     if (edgeCount >= 3) {
-                       // the end node is a junction, try to leave a segment
-                       // between it and the structure - #7202
-                       var insetLength = crossingToEdgeEndDistance - minEdgeLengthMeters;
+           if (!showsPano || !showsFlat) {
+             sequences = sequences.filter(function (sequence) {
+               if (sequence.properties.hasOwnProperty('is_pano')) {
+                 if (sequence.properties.is_pano) return showsPano;
+                 return showsFlat;
+               }
 
-                       if (insetLength > minEdgeLengthMeters) {
-                         var insetNodeLoc = locGetter(insetLength);
-                         newNode = osmNode();
-                         graph = actionAddMidpoint({
-                           loc: insetNodeLoc,
-                           edge: edge
-                         }, newNode)(graph);
-                       }
-                     }
-                   } // if the edge is too short to subdivide as desired, then
-                   // just bound the structure at the existing end node
+               return false;
+             });
+           }
 
+           if (fromDate) {
+             sequences = sequences.filter(function (sequence) {
+               return new Date(sequence.properties.captured_at).getTime() >= new Date(fromDate).getTime().toString();
+             });
+           }
 
-                   if (!newNode) newNode = endNode;
-                   var splitAction = actionSplit([newNode.id]).limitWays(resultWayIDs); // only split selected or created ways
-                   // do the split
+           if (toDate) {
+             sequences = sequences.filter(function (sequence) {
+               return new Date(sequence.properties.captured_at).getTime() <= new Date(toDate).getTime().toString();
+             });
+           }
 
-                   graph = splitAction(graph);
+           return sequences;
+         }
 
-                   if (splitAction.getCreatedWayIDs().length) {
-                     resultWayIDs.push(splitAction.getCreatedWayIDs()[0]);
-                   }
+         function update() {
+           var z = ~~context.map().zoom();
+           var showMarkers = z >= minMarkerZoom;
+           var showViewfields = z >= minViewfieldZoom;
+           var service = getService();
+           var sequences = service ? service.sequences(projection) : [];
+           var images = service && showMarkers ? service.images(projection) : [];
+           images = filterImages(images);
+           sequences = filterSequences(sequences);
+           service.filterViewer(context);
+           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+             return d.properties.id;
+           }); // exit
 
-                   return newNode;
-                 }
+           traces.exit().remove(); // enter/update
 
-                 var structEndNode1 = determineEndpoint(edge, edgeNodes[1], endpointLocGetter1);
-                 var structEndNode2 = determineEndpoint([edgeNodes[0].id, structEndNode1.id], edgeNodes[0], endpointLocGetter2);
-                 var structureWay = resultWayIDs.map(function (id) {
-                   return graph.entity(id);
-                 }).find(function (way) {
-                   return way.nodes.indexOf(structEndNode1.id) !== -1 && way.nodes.indexOf(structEndNode2.id) !== -1;
-                 });
-                 var tags = Object.assign({}, structureWay.tags); // copy tags
+           traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+             return d.id;
+           }); // exit
 
-                 if (bridgeOrTunnel === 'bridge') {
-                   tags.bridge = 'yes';
-                   tags.layer = '1';
-                 } else {
-                   var tunnelValue = 'yes';
+           groups.exit().remove(); // enter
 
-                   if (getFeatureType(structureWay, graph) === 'waterway') {
-                     // use `tunnel=culvert` for waterways by default
-                     tunnelValue = 'culvert';
-                   }
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-                   tags.tunnel = tunnelValue;
-                   tags.layer = '-1';
-                 } // apply the structure tags to the way
+           var markers = groups.merge(groupsEnter).sort(function (a, b) {
+             return b.loc[1] - a.loc[1]; // sort Y
+           }).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove();
+           viewfields.enter() // viewfields may or may not be drawn...
+           .insert('path', 'circle') // but if they are, draw below the circles
+           .attr('class', 'viewfield').classed('pano', function () {
+             return this.parentNode.__data__.is_pano;
+           }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
 
+           function viewfieldPath() {
+             if (this.parentNode.__data__.is_pano) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+             }
+           }
+         }
 
-                 graph = actionChangeTags(structureWay.id, tags)(graph);
-                 return graph;
-               };
+         function drawImages(selection) {
+           var enabled = svgMapillaryImages.enabled;
+           var service = getService();
+           layer = selection.selectAll('.layer-mapillary').data(service ? [0] : []);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'sequences');
+           layerEnter.append('g').attr('class', 'markers');
+           layer = layerEnter.merge(layer);
 
-               context.perform(action, _t('issues.fix.' + fixTitleID + '.annotation'));
-               context.enter(modeSelect(context, resultWayIDs));
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadImages(projection);
+             } else {
+               editOff();
              }
-           });
+           }
          }
 
-         function makeConnectWaysFix(connectionTags) {
-           var fixTitleID = 'connect_features';
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgMapillaryImages.enabled;
+           svgMapillaryImages.enabled = _;
 
-           if (connectionTags.ford) {
-             fixTitleID = 'connect_using_ford';
+           if (svgMapillaryImages.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_images', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_images', null);
            }
 
-           return new validationIssueFix({
-             icon: 'iD-icon-crossing',
-             title: _t.html('issues.fix.' + fixTitleID + '.title'),
-             onClick: function onClick(context) {
-               var loc = this.issue.loc;
-               var connectionTags = this.issue.data.connectionTags;
-               var edges = this.issue.data.edges;
-               context.perform(function actionConnectCrossingWays(graph) {
-                 // create the new node for the points
-                 var node = osmNode({
-                   loc: loc,
-                   tags: connectionTags
-                 });
-                 graph = graph.replace(node);
-                 var nodesToMerge = [node.id];
-                 var mergeThresholdInMeters = 0.75;
-                 edges.forEach(function (edge) {
-                   var edgeNodes = [graph.entity(edge[0]), graph.entity(edge[1])];
-                   var closestNodeInfo = geoSphericalClosestNode(edgeNodes, loc); // if there is already a point nearby, use that
-
-                   if (closestNodeInfo.distance < mergeThresholdInMeters) {
-                     nodesToMerge.push(closestNodeInfo.node.id); // else add the new node to the way
-                   } else {
-                     graph = actionAddMidpoint({
-                       loc: loc,
-                       edge: edge
-                     }, node)(graph);
-                   }
-                 });
+           dispatch.call('change');
+           return this;
+         };
 
-                 if (nodesToMerge.length > 1) {
-                   // if we're using nearby nodes, merge them with the new node
-                   graph = actionMergeNodes(nodesToMerge, loc)(graph);
-                 }
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-                 return graph;
-               }, _t('issues.fix.connect_crossing_features.annotation'));
-             }
-           });
-         }
+         init();
+         return drawImages;
+       }
 
-         function makeChangeLayerFix(higherOrLower) {
-           return new validationIssueFix({
-             icon: 'iD-icon-' + (higherOrLower === 'higher' ? 'up' : 'down'),
-             title: _t.html('issues.fix.tag_this_as_' + higherOrLower + '.title'),
-             onClick: function onClick(context) {
-               var mode = context.mode();
-               if (!mode || mode.id !== 'select') return;
-               var selectedIDs = mode.selectedIDs();
-               if (selectedIDs.length !== 1) return;
-               var selectedID = selectedIDs[0];
-               if (!this.issue.entityIds.some(function (entityId) {
-                 return entityId === selectedID;
-               })) return;
-               var entity = context.hasEntity(selectedID);
-               if (!entity) return;
-               var tags = Object.assign({}, entity.tags); // shallow copy
+       function svgMapillaryPosition(projection, context) {
+         var throttledRedraw = throttle(function () {
+           update();
+         }, 1000);
 
-               var layer = tags.layer && Number(tags.layer);
+         var minZoom = 12;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
 
-               if (layer && !isNaN(layer)) {
-                 if (higherOrLower === 'higher') {
-                   layer += 1;
-                 } else {
-                   layer -= 1;
-                 }
-               } else {
-                 if (higherOrLower === 'higher') {
-                   layer = 1;
-                 } else {
-                   layer = -1;
-                 }
-               }
+         var _mapillary;
 
-               tags.layer = layer.toString();
-               context.perform(actionChangeTags(entity.id, tags), _t('operations.change_tags.annotation'));
-             }
-           });
+         var viewerCompassAngle;
+
+         function init() {
+           if (svgMapillaryPosition.initialized) return; // run once
+
+           svgMapillaryPosition.initialized = true;
          }
 
-         validation.type = type;
-         return validation;
-       }
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-       function validationDisconnectedWay() {
-         var type = 'disconnected_way';
+             _mapillary.event.on('imageChanged', throttledRedraw);
 
-         function isTaggedAsHighway(entity) {
-           return osmRoutableHighwayTagValues[entity.tags.highway];
+             _mapillary.event.on('bearingChanged', function (e) {
+               viewerCompassAngle = e.bearing;
+               if (context.map().isTransformed()) return;
+               layer.selectAll('.viewfield-group.currentView').filter(function (d) {
+                 return d.is_pano;
+               }).attr('transform', transform);
+             });
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
+           }
+
+           return _mapillary;
          }
 
-         var validation = function checkDisconnectedWay(entity, graph) {
-           var routingIslandWays = routingIslandForEntity(entity);
-           if (!routingIslandWays) return [];
-           return [new validationIssue({
-             type: type,
-             subtype: 'highway',
-             severity: 'warning',
-             message: function message(context) {
-               var entity = this.entityIds.length && context.hasEntity(this.entityIds[0]);
-               var label = entity && utilDisplayLabel(entity, context.graph());
-               return _t.html('issues.disconnected_way.routable.message', {
-                 count: this.entityIds.length,
-                 highway: label
-               });
-             },
-             reference: showReference,
-             entityIds: Array.from(routingIslandWays).map(function (way) {
-               return way.id;
-             }),
-             dynamicFixes: makeFixes
-           })];
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-           function makeFixes(context) {
-             var fixes = [];
-             var singleEntity = this.entityIds.length === 1 && context.hasEntity(this.entityIds[0]);
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
 
-             if (singleEntity) {
-               if (singleEntity.type === 'way' && !singleEntity.isClosed()) {
-                 var textDirection = _mainLocalizer.textDirection();
-                 var startFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.first(), 'start');
-                 if (startFix) fixes.push(startFix);
-                 var endFix = makeContinueDrawingFixIfAllowed(textDirection, singleEntity.last(), 'end');
-                 if (endFix) fixes.push(endFix);
-               }
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
 
-               if (!fixes.length) {
-                 fixes.push(new validationIssueFix({
-                   title: _t.html('issues.fix.connect_feature.title')
-                 }));
-               }
+           if (d.is_pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
+             t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
+           } else if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+           }
 
-               fixes.push(new validationIssueFix({
-                 icon: 'iD-operation-delete',
-                 title: _t.html('issues.fix.delete_feature.title'),
-                 entityIds: [singleEntity.id],
-                 onClick: function onClick(context) {
-                   var id = this.issue.entityIds[0];
-                   var operation = operationDelete(context, [id]);
+           return t;
+         }
 
-                   if (!operation.disabled()) {
-                     operation();
-                   }
-                 }
-               }));
-             } else {
-               fixes.push(new validationIssueFix({
-                 title: _t.html('issues.fix.connect_features.title')
-               }));
-             }
+         function update() {
+           var z = ~~context.map().zoom();
+           var showViewfields = z >= minViewfieldZoom;
+           var service = getService();
+           var image = service && service.getActiveImage();
+           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(image ? [image] : [], function (d) {
+             return d.id;
+           }); // exit
 
-             return fixes;
-           }
+           groups.exit().remove(); // enter
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.disconnected_way.routable.reference'));
-           }
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-           function routingIslandForEntity(entity) {
-             var routingIsland = new Set(); // the interconnected routable features
+           var markers = groups.merge(groupsEnter).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove();
+           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
+         }
 
-             var waysToCheck = []; // the queue of remaining routable ways to traverse
+         function drawImages(selection) {
+           var service = getService();
+           layer = selection.selectAll('.layer-mapillary-position').data(service ? [0] : []);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary-position');
+           layerEnter.append('g').attr('class', 'markers');
+           layer = layerEnter.merge(layer);
 
-             function queueParentWays(node) {
-               graph.parentWays(node).forEach(function (parentWay) {
-                 if (!routingIsland.has(parentWay) && // only check each feature once
-                 isRoutableWay(parentWay, false)) {
-                   // only check routable features
-                   routingIsland.add(parentWay);
-                   waysToCheck.push(parentWay);
-                 }
-               });
-             }
+           if (service && ~~context.map().zoom() >= minZoom) {
+             editOn();
+             update();
+           } else {
+             editOff();
+           }
+         }
 
-             if (entity.type === 'way' && isRoutableWay(entity, true)) {
-               routingIsland.add(entity);
-               waysToCheck.push(entity);
-             } else if (entity.type === 'node' && isRoutableNode(entity)) {
-               routingIsland.add(entity);
-               queueParentWays(entity);
-             } else {
-               // this feature isn't routable, cannot be a routing island
-               return null;
-             }
+         drawImages.enabled = function () {
+           update();
+           return this;
+         };
 
-             while (waysToCheck.length) {
-               var wayToCheck = waysToCheck.pop();
-               var childNodes = graph.childNodes(wayToCheck);
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-               for (var i in childNodes) {
-                 var vertex = childNodes[i];
+         init();
+         return drawImages;
+       }
 
-                 if (isConnectedVertex(vertex)) {
-                   // found a link to the wider network, not a routing island
-                   return null;
-                 }
+       function svgMapillarySigns(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-                 if (isRoutableNode(vertex)) {
-                   routingIsland.add(vertex);
-                 }
+         var minZoom = 12;
+         var layer = select(null);
 
-                 queueParentWays(vertex);
-               }
-             } // no network link found, this is a routing island, return its members
+         var _mapillary;
 
+         function init() {
+           if (svgMapillarySigns.initialized) return; // run once
 
-             return routingIsland;
-           }
+           svgMapillarySigns.enabled = false;
+           svgMapillarySigns.initialized = true;
+         }
 
-           function isConnectedVertex(vertex) {
-             // assume ways overlapping unloaded tiles are connected to the wider road network  - #5938
-             var osm = services.osm;
-             if (osm && !osm.isDataLoaded(vertex.loc)) return true; // entrances are considered connected
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-             if (vertex.tags.entrance && vertex.tags.entrance !== 'no') return true;
-             if (vertex.tags.amenity === 'parking_entrance') return true;
-             return false;
+             _mapillary.event.on('loadedSigns', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
            }
 
-           function isRoutableNode(node) {
-             // treat elevators as distinct features in the highway network
-             if (node.tags.highway === 'elevator') return true;
-             return false;
-           }
+           return _mapillary;
+         }
 
-           function isRoutableWay(way, ignoreInnerWays) {
-             if (isTaggedAsHighway(way) || way.tags.route === 'ferry') return true;
-             return graph.parentRelations(way).some(function (parentRelation) {
-               if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true;
-               if (parentRelation.isMultipolygon() && isTaggedAsHighway(parentRelation) && (!ignoreInnerWays || parentRelation.memberById(way.id).role !== 'inner')) return true;
-               return false;
-             });
-           }
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           service.loadSignResources(context);
+           editOn();
+         }
 
-           function makeContinueDrawingFixIfAllowed(textDirection, vertexID, whichEnd) {
-             var vertex = graph.hasEntity(vertexID);
-             if (!vertex || vertex.tags.noexit === 'yes') return null;
-             var useLeftContinue = whichEnd === 'start' && textDirection === 'ltr' || whichEnd === 'end' && textDirection === 'rtl';
-             return new validationIssueFix({
-               icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-               title: _t.html('issues.fix.continue_from_' + whichEnd + '.title'),
-               entityIds: [vertexID],
-               onClick: function onClick(context) {
-                 var wayId = this.issue.entityIds[0];
-                 var way = context.hasEntity(wayId);
-                 var vertexId = this.entityIds[0];
-                 var vertex = context.hasEntity(vertexId);
-                 if (!way || !vertex) return; // make sure the vertex is actually visible and editable
+         function hideLayer() {
+           throttledRedraw.cancel();
+           editOff();
+         }
 
-                 var map = context.map();
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-                 if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-                   map.zoomToEase(vertex);
-                 }
+         function editOff() {
+           layer.selectAll('.icon-sign').remove();
+           layer.style('display', 'none');
+         }
 
-                 context.enter(modeDrawLine(context, wayId, context.graph(), 'line', way.affix(vertexId), true));
+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return;
+           context.map().centerEase(d.loc);
+           var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
+           service.getDetections(d.id).then(function (detections) {
+             if (detections.length) {
+               var imageId = detections[0].image.id;
+
+               if (imageId === selectedImageId) {
+                 service.highlightDetection(detections[0]).selectImage(context, imageId);
+               } else {
+                 service.ensureViewerLoaded(context).then(function () {
+                   service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
+                 });
                }
+             }
+           });
+         }
+
+         function filterData(detectedFeatures) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
              });
            }
-         };
 
-         validation.type = type;
-         return validation;
-       }
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
+             });
+           }
 
-       function validationFormatting() {
-         var type = 'invalid_format';
+           return detectedFeatures;
+         }
 
-         var validation = function validation(entity) {
-           var issues = [];
+         function update() {
+           var service = getService();
+           var data = service ? service.signs(projection) : [];
+           data = filterData(data);
+           var transform = svgPointTransform(projection);
+           var signs = layer.selectAll('.icon-sign').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-           function isValidEmail(email) {
-             // Emails in OSM are going to be official so they should be pretty simple
-             // Using negated lists to better support all possible unicode characters (#6494)
-             var valid_email = /^[^\(\)\\,":;<>@\[\]]+@[^\(\)\\,":;<>@\[\]\.]+(?:\.[a-z0-9-]+)*$/i; // An empty value is also acceptable
+           signs.exit().remove(); // enter
 
-             return !email || valid_email.test(email);
-           }
-           /*
-           function isSchemePresent(url) {
-               var valid_scheme = /^https?:\/\//i;
-               return (!url || valid_scheme.test(url));
-           }
-           */
+           var enter = signs.enter().append('g').attr('class', 'icon-sign icon-detected').on('click', click);
+           enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+             return '#' + d.value;
+           });
+           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
+           signs.merge(enter).attr('transform', transform);
+         }
 
-           function showReferenceEmail(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.invalid_format.email.reference'));
-           }
-           /*
-           function showReferenceWebsite(selection) {
-               selection.selectAll('.issue-reference')
-                   .data([0])
-                   .enter()
-                   .append('div')
-                   .attr('class', 'issue-reference')
-                   .html(t.html('issues.invalid_format.website.reference'));
-           }
-            if (entity.tags.website) {
-               // Multiple websites are possible
-               // If ever we support ES6, arrow functions make this nicer
-               var websites = entity.tags.website
-                   .split(';')
-                   .map(function(s) { return s.trim(); })
-                   .filter(function(x) { return !isSchemePresent(x); });
-                if (websites.length) {
-                   issues.push(new validationIssue({
-                       type: type,
-                       subtype: 'website',
-                       severity: 'warning',
-                       message: function(context) {
-                           var entity = context.hasEntity(this.entityIds[0]);
-                           return entity ? t.html('issues.invalid_format.website.message' + this.data,
-                               { feature: utilDisplayLabel(entity, context.graph()), site: websites.join(', ') }) : '';
-                       },
-                       reference: showReferenceWebsite,
-                       entityIds: [entity.id],
-                       hash: websites.join(),
-                       data: (websites.length > 1) ? '_multi' : ''
-                   }));
-               }
-           }
-           */
+         function drawSigns(selection) {
+           var enabled = svgMapillarySigns.enabled;
+           var service = getService();
+           layer = selection.selectAll('.layer-mapillary-signs').data(service ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-mapillary-signs layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
 
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadSigns(projection);
+               service.showSignDetections(true);
+             } else {
+               editOff();
+             }
+           } else if (service) {
+             service.showSignDetections(false);
+           }
+         }
 
-           if (entity.tags.email) {
-             // Multiple emails are possible
-             var emails = entity.tags.email.split(';').map(function (s) {
-               return s.trim();
-             }).filter(function (x) {
-               return !isValidEmail(x);
-             });
+         drawSigns.enabled = function (_) {
+           if (!arguments.length) return svgMapillarySigns.enabled;
+           svgMapillarySigns.enabled = _;
 
-             if (emails.length) {
-               issues.push(new validationIssue({
-                 type: type,
-                 subtype: 'email',
-                 severity: 'warning',
-                 message: function message(context) {
-                   var entity = context.hasEntity(this.entityIds[0]);
-                   return entity ? _t.html('issues.invalid_format.email.message' + this.data, {
-                     feature: utilDisplayLabel(entity, context.graph()),
-                     email: emails.join(', ')
-                   }) : '';
-                 },
-                 reference: showReferenceEmail,
-                 entityIds: [entity.id],
-                 hash: emails.join(),
-                 data: emails.length > 1 ? '_multi' : ''
-               }));
-             }
+           if (svgMapillarySigns.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_signs', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_signs', null);
            }
 
-           return issues;
+           dispatch.call('change');
+           return this;
          };
 
-         validation.type = type;
-         return validation;
+         drawSigns.supported = function () {
+           return !!getService();
+         };
+
+         init();
+         return drawSigns;
        }
 
-       function validationHelpRequest(context) {
-         var type = 'help_request';
+       function svgMapillaryMapFeatures(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-         var validation = function checkFixmeTag(entity) {
-           if (!entity.tags.fixme) return []; // don't flag fixmes on features added by the user
+         var minZoom = 12;
+         var layer = select(null);
 
-           if (entity.version === undefined) return [];
+         var _mapillary;
 
-           if (entity.v !== undefined) {
-             var baseEntity = context.history().base().hasEntity(entity.id); // don't flag fixmes added by the user on existing features
+         function init() {
+           if (svgMapillaryMapFeatures.initialized) return; // run once
 
-             if (!baseEntity || !baseEntity.tags.fixme) return [];
-           }
+           svgMapillaryMapFeatures.enabled = false;
+           svgMapillaryMapFeatures.initialized = true;
+         }
 
-           return [new validationIssue({
-             type: type,
-             subtype: 'fixme_tag',
-             severity: 'warning',
-             message: function message(context) {
-               var entity = context.hasEntity(this.entityIds[0]);
-               return entity ? _t.html('issues.fixme_tag.message', {
-                 feature: utilDisplayLabel(entity, context.graph())
-               }) : '';
-             },
-             dynamicFixes: function dynamicFixes() {
-               return [new validationIssueFix({
-                 title: _t.html('issues.fix.address_the_concern.title')
-               })];
-             },
-             reference: showReference,
-             entityIds: [entity.id]
-           })];
+         function getService() {
+           if (services.mapillary && !_mapillary) {
+             _mapillary = services.mapillary;
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.fixme_tag.reference'));
+             _mapillary.event.on('loadedMapFeatures', throttledRedraw);
+           } else if (!services.mapillary && _mapillary) {
+             _mapillary = null;
            }
-         };
 
-         validation.type = type;
-         return validation;
-       }
+           return _mapillary;
+         }
 
-       function validationImpossibleOneway() {
-         var type = 'impossible_oneway';
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           service.loadObjectResources(context);
+           editOn();
+         }
 
-         var validation = function checkImpossibleOneway(entity, graph) {
-           if (entity.type !== 'way' || entity.geometry(graph) !== 'line') return [];
-           if (entity.isClosed()) return [];
-           if (!typeForWay(entity)) return [];
-           if (!isOneway(entity)) return [];
-           var firstIssues = issuesForNode(entity, entity.first());
-           var lastIssues = issuesForNode(entity, entity.last());
-           return firstIssues.concat(lastIssues);
+         function hideLayer() {
+           throttledRedraw.cancel();
+           editOff();
+         }
 
-           function typeForWay(way) {
-             if (way.geometry(graph) !== 'line') return null;
-             if (osmRoutableHighwayTagValues[way.tags.highway]) return 'highway';
-             if (osmFlowingWaterwayTagValues[way.tags.waterway]) return 'waterway';
-             return null;
-           }
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-           function isOneway(way) {
-             if (way.tags.oneway === 'yes') return true;
-             if (way.tags.oneway) return false;
+         function editOff() {
+           layer.selectAll('.icon-map-feature').remove();
+           layer.style('display', 'none');
+         }
 
-             for (var key in way.tags) {
-               if (osmOneWayTags[key] && osmOneWayTags[key][way.tags[key]]) {
-                 return true;
+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return;
+           context.map().centerEase(d.loc);
+           var selectedImageId = service.getActiveImage() && service.getActiveImage().id;
+           service.getDetections(d.id).then(function (detections) {
+             if (detections.length) {
+               var imageId = detections[0].image.id;
+
+               if (imageId === selectedImageId) {
+                 service.highlightDetection(detections[0]).selectImage(context, imageId);
+               } else {
+                 service.ensureViewerLoaded(context).then(function () {
+                   service.highlightDetection(detections[0]).selectImage(context, imageId).showViewer(context);
+                 });
                }
              }
+           });
+         }
 
-             return false;
+         function filterData(detectedFeatures) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+
+           if (fromDate) {
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.last_seen_at).getTime() >= new Date(fromDate).getTime();
+             });
            }
 
-           function nodeOccursMoreThanOnce(way, nodeID) {
-             var occurrences = 0;
+           if (toDate) {
+             detectedFeatures = detectedFeatures.filter(function (feature) {
+               return new Date(feature.first_seen_at).getTime() <= new Date(toDate).getTime();
+             });
+           }
 
-             for (var index in way.nodes) {
-               if (way.nodes[index] === nodeID) {
-                 occurrences += 1;
-                 if (occurrences > 1) return true;
-               }
-             }
+           return detectedFeatures;
+         }
 
-             return false;
-           }
+         function update() {
+           var service = getService();
+           var data = service ? service.mapFeatures(projection) : [];
+           data = filterData(data);
+           var transform = svgPointTransform(projection);
+           var mapFeatures = layer.selectAll('.icon-map-feature').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-           function isConnectedViaOtherTypes(way, node) {
-             var wayType = typeForWay(way);
+           mapFeatures.exit().remove(); // enter
 
-             if (wayType === 'highway') {
-               // entrances are considered connected
-               if (node.tags.entrance && node.tags.entrance !== 'no') return true;
-               if (node.tags.amenity === 'parking_entrance') return true;
-             } else if (wayType === 'waterway') {
-               if (node.id === way.first()) {
-                 // multiple waterways may start at the same spring
-                 if (node.tags.natural === 'spring') return true;
-               } else {
-                 // multiple waterways may end at the same drain
-                 if (node.tags.manhole === 'drain') return true;
-               }
+           var enter = mapFeatures.enter().append('g').attr('class', 'icon-map-feature icon-detected').on('click', click);
+           enter.append('title').text(function (d) {
+             var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
+             return _t('mapillary_map_features.' + id);
+           });
+           enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
+             if (d.value === 'object--billboard') {
+               // no billboard icon right now, so use the advertisement icon
+               return '#object--sign--advertisement';
              }
 
-             return graph.parentWays(node).some(function (parentWay) {
-               if (parentWay.id === way.id) return false;
-
-               if (wayType === 'highway') {
-                 // allow connections to highway areas
-                 if (parentWay.geometry(graph) === 'area' && osmRoutableHighwayTagValues[parentWay.tags.highway]) return true; // count connections to ferry routes as connected
+             return '#' + d.value;
+           });
+           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
 
-                 if (parentWay.tags.route === 'ferry') return true;
-                 return graph.parentRelations(parentWay).some(function (parentRelation) {
-                   if (parentRelation.tags.type === 'route' && parentRelation.tags.route === 'ferry') return true; // allow connections to highway multipolygons
+           mapFeatures.merge(enter).attr('transform', transform);
+         }
 
-                   return parentRelation.isMultipolygon() && osmRoutableHighwayTagValues[parentRelation.tags.highway];
-                 });
-               } else if (wayType === 'waterway') {
-                 // multiple waterways may start or end at a water body at the same node
-                 if (parentWay.tags.natural === 'water' || parentWay.tags.natural === 'coastline') return true;
-               }
+         function drawMapFeatures(selection) {
+           var enabled = svgMapillaryMapFeatures.enabled;
+           var service = getService();
+           layer = selection.selectAll('.layer-mapillary-map-features').data(service ? [0] : []);
+           layer.exit().remove();
+           layer = layer.enter().append('g').attr('class', 'layer-mapillary-map-features layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
 
-               return false;
-             });
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadMapFeatures(projection);
+               service.showFeatureDetections(true);
+             } else {
+               editOff();
+             }
+           } else if (service) {
+             service.showFeatureDetections(false);
            }
+         }
 
-           function issuesForNode(way, nodeID) {
-             var isFirst = nodeID === way.first();
-             var wayType = typeForWay(way); // ignore if this way is self-connected at this node
-
-             if (nodeOccursMoreThanOnce(way, nodeID)) return [];
-             var osm = services.osm;
-             if (!osm) return [];
-             var node = graph.hasEntity(nodeID); // ignore if this node or its tile are unloaded
+         drawMapFeatures.enabled = function (_) {
+           if (!arguments.length) return svgMapillaryMapFeatures.enabled;
+           svgMapillaryMapFeatures.enabled = _;
 
-             if (!node || !osm.isDataLoaded(node.loc)) return [];
-             if (isConnectedViaOtherTypes(way, node)) return [];
-             var attachedWaysOfSameType = graph.parentWays(node).filter(function (parentWay) {
-               if (parentWay.id === way.id) return false;
-               return typeForWay(parentWay) === wayType;
-             }); // assume it's okay for waterways to start or end disconnected for now
+           if (svgMapillaryMapFeatures.enabled) {
+             showLayer();
+             context.photos().on('change.mapillary_map_features', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.mapillary_map_features', null);
+           }
 
-             if (wayType === 'waterway' && attachedWaysOfSameType.length === 0) return [];
-             var attachedOneways = attachedWaysOfSameType.filter(function (attachedWay) {
-               return isOneway(attachedWay);
-             }); // ignore if the way is connected to some non-oneway features
+           dispatch.call('change');
+           return this;
+         };
 
-             if (attachedOneways.length < attachedWaysOfSameType.length) return [];
+         drawMapFeatures.supported = function () {
+           return !!getService();
+         };
 
-             if (attachedOneways.length) {
-               var connectedEndpointsOkay = attachedOneways.some(function (attachedOneway) {
-                 if ((isFirst ? attachedOneway.first() : attachedOneway.last()) !== nodeID) return true;
-                 if (nodeOccursMoreThanOnce(attachedOneway, nodeID)) return true;
-                 return false;
-               });
-               if (connectedEndpointsOkay) return [];
-             }
+         init();
+         return drawMapFeatures;
+       }
 
-             var placement = isFirst ? 'start' : 'end',
-                 messageID = wayType + '.',
-                 referenceID = wayType + '.';
+       function svgKartaviewImages(projection, context, dispatch) {
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-             if (wayType === 'waterway') {
-               messageID += 'connected.' + placement;
-               referenceID += 'connected';
-             } else {
-               messageID += placement;
-               referenceID += placement;
-             }
+         var minZoom = 12;
+         var minMarkerZoom = 16;
+         var minViewfieldZoom = 18;
+         var layer = select(null);
 
-             return [new validationIssue({
-               type: type,
-               subtype: wayType,
-               severity: 'warning',
-               message: function message(context) {
-                 var entity = context.hasEntity(this.entityIds[0]);
-                 return entity ? _t.html('issues.impossible_oneway.' + messageID + '.message', {
-                   feature: utilDisplayLabel(entity, context.graph())
-                 }) : '';
-               },
-               reference: getReference(referenceID),
-               entityIds: [way.id, node.id],
-               dynamicFixes: function dynamicFixes() {
-                 var fixes = [];
+         var _kartaview;
 
-                 if (attachedOneways.length) {
-                   fixes.push(new validationIssueFix({
-                     icon: 'iD-operation-reverse',
-                     title: _t.html('issues.fix.reverse_feature.title'),
-                     entityIds: [way.id],
-                     onClick: function onClick(context) {
-                       var id = this.issue.entityIds[0];
-                       context.perform(actionReverse(id), _t('operations.reverse.annotation.line', {
-                         n: 1
-                       }));
-                     }
-                   }));
-                 }
+         function init() {
+           if (svgKartaviewImages.initialized) return; // run once
 
-                 if (node.tags.noexit !== 'yes') {
-                   var textDirection = _mainLocalizer.textDirection();
-                   var useLeftContinue = isFirst && textDirection === 'ltr' || !isFirst && textDirection === 'rtl';
-                   fixes.push(new validationIssueFix({
-                     icon: 'iD-operation-continue' + (useLeftContinue ? '-left' : ''),
-                     title: _t.html('issues.fix.continue_from_' + (isFirst ? 'start' : 'end') + '.title'),
-                     onClick: function onClick(context) {
-                       var entityID = this.issue.entityIds[0];
-                       var vertexID = this.issue.entityIds[1];
-                       var way = context.entity(entityID);
-                       var vertex = context.entity(vertexID);
-                       continueDrawing(way, vertex, context);
-                     }
-                   }));
-                 }
+           svgKartaviewImages.enabled = false;
+           svgKartaviewImages.initialized = true;
+         }
 
-                 return fixes;
-               },
-               loc: node.loc
-             })];
+         function getService() {
+           if (services.kartaview && !_kartaview) {
+             _kartaview = services.kartaview;
 
-             function getReference(referenceID) {
-               return function showReference(selection) {
-                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.impossible_oneway.' + referenceID + '.reference'));
-               };
-             }
+             _kartaview.event.on('loadedImages', throttledRedraw);
+           } else if (!services.kartaview && _kartaview) {
+             _kartaview = null;
            }
-         };
 
-         function continueDrawing(way, vertex, context) {
-           // make sure the vertex is actually visible and editable
-           var map = context.map();
+           return _kartaview;
+         }
 
-           if (!context.editable() || !map.trimmedExtent().contains(vertex.loc)) {
-             map.zoomToEase(vertex);
-           }
+         function showLayer() {
+           var service = getService();
+           if (!service) return;
+           editOn();
+           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
+             dispatch.call('change');
+           });
+         }
 
-           context.enter(modeDrawLine(context, way.id, context.graph(), 'line', way.affix(vertex.id), true));
+         function hideLayer() {
+           throttledRedraw.cancel();
+           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
          }
 
-         validation.type = type;
-         return validation;
-       }
+         function editOn() {
+           layer.style('display', 'block');
+         }
 
-       function validationIncompatibleSource() {
-         var type = 'incompatible_source';
-         var invalidSources = [{
-           id: 'google',
-           regex: 'google',
-           exceptRegex: 'books.google|Google Books|drive.google|googledrive|Google Drive'
-         }];
+         function editOff() {
+           layer.selectAll('.viewfield-group').remove();
+           layer.style('display', 'none');
+         }
 
-         var validation = function checkIncompatibleSource(entity) {
-           var entitySources = entity.tags && entity.tags.source && entity.tags.source.split(';');
-           if (!entitySources) return [];
-           var issues = [];
-           invalidSources.forEach(function (invalidSource) {
-             var hasInvalidSource = entitySources.some(function (source) {
-               if (!source.match(new RegExp(invalidSource.regex, 'i'))) return false;
-               if (invalidSource.exceptRegex && source.match(new RegExp(invalidSource.exceptRegex, 'i'))) return false;
-               return true;
-             });
-             if (!hasInvalidSource) return;
-             issues.push(new validationIssue({
-               type: type,
-               severity: 'warning',
-               message: function message(context) {
-                 var entity = context.hasEntity(this.entityIds[0]);
-                 return entity ? _t.html('issues.incompatible_source.' + invalidSource.id + '.feature.message', {
-                   feature: utilDisplayLabel(entity, context.graph())
-                 }) : '';
-               },
-               reference: getReference(invalidSource.id),
-               entityIds: [entity.id],
-               dynamicFixes: function dynamicFixes() {
-                 return [new validationIssueFix({
-                   title: _t.html('issues.fix.remove_proprietary_data.title')
-                 })];
-               }
-             }));
+         function click(d3_event, d) {
+           var service = getService();
+           if (!service) return;
+           service.ensureViewerLoaded(context).then(function () {
+             service.selectImage(context, d.key).showViewer(context);
            });
-           return issues;
+           context.map().centerEase(d.loc);
+         }
 
-           function getReference(id) {
-             return function showReference(selection) {
-               selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.incompatible_source.' + id + '.reference'));
-             };
-           }
-         };
+         function mouseover(d3_event, d) {
+           var service = getService();
+           if (service) service.setStyles(context, d);
+         }
 
-         validation.type = type;
-         return validation;
-       }
+         function mouseout() {
+           var service = getService();
+           if (service) service.setStyles(context, null);
+         }
 
-       function validationMaprules() {
-         var type = 'maprules';
+         function transform(d) {
+           var t = svgPointTransform(projection)(d);
 
-         var validation = function checkMaprules(entity, graph) {
-           if (!services.maprules) return [];
-           var rules = services.maprules.validationRules();
-           var issues = [];
+           if (d.ca) {
+             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+           }
 
-           for (var i = 0; i < rules.length; i++) {
-             var rule = rules[i];
-             rule.findIssues(entity, graph, issues);
+           return t;
+         }
+
+         function filterImages(images) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
+
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             images = images.filter(function (item) {
+               return new Date(item.captured_at).getTime() >= fromTimestamp;
+             });
            }
 
-           return issues;
-         };
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             images = images.filter(function (item) {
+               return new Date(item.captured_at).getTime() <= toTimestamp;
+             });
+           }
 
-         validation.type = type;
-         return validation;
-       }
+           if (usernames) {
+             images = images.filter(function (item) {
+               return usernames.indexOf(item.captured_by) !== -1;
+             });
+           }
 
-       function validationMismatchedGeometry() {
-         var type = 'mismatched_geometry';
+           return images;
+         }
 
-         function tagSuggestingLineIsArea(entity) {
-           if (entity.type !== 'way' || entity.isClosed()) return null;
-           var tagSuggestingArea = entity.tagSuggestingArea();
+         function filterSequences(sequences) {
+           var fromDate = context.photos().fromDate();
+           var toDate = context.photos().toDate();
+           var usernames = context.photos().usernames();
 
-           if (!tagSuggestingArea) {
-             return null;
+           if (fromDate) {
+             var fromTimestamp = new Date(fromDate).getTime();
+             sequences = sequences.filter(function (image) {
+               return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
+             });
            }
 
-           var asLine = _mainPresetIndex.matchTags(tagSuggestingArea, 'line');
-           var asArea = _mainPresetIndex.matchTags(tagSuggestingArea, 'area');
+           if (toDate) {
+             var toTimestamp = new Date(toDate).getTime();
+             sequences = sequences.filter(function (image) {
+               return new Date(image.properties.captured_at).getTime() <= toTimestamp;
+             });
+           }
 
-           if (asLine && asArea && asLine === asArea) {
-             // these tags also allow lines and making this an area wouldn't matter
-             return null;
+           if (usernames) {
+             sequences = sequences.filter(function (image) {
+               return usernames.indexOf(image.properties.captured_by) !== -1;
+             });
            }
 
-           return tagSuggestingArea;
+           return sequences;
          }
 
-         function makeConnectEndpointsFixOnClick(way, graph) {
-           // must have at least three nodes to close this automatically
-           if (way.nodes.length < 3) return null;
-           var nodes = graph.childNodes(way),
-               testNodes;
-           var firstToLastDistanceMeters = geoSphericalDistance(nodes[0].loc, nodes[nodes.length - 1].loc); // if the distance is very small, attempt to merge the endpoints
+         function update() {
+           var viewer = context.container().select('.photoviewer');
+           var selected = viewer.empty() ? undefined : viewer.datum();
+           var z = ~~context.map().zoom();
+           var showMarkers = z >= minMarkerZoom;
+           var showViewfields = z >= minViewfieldZoom;
+           var service = getService();
+           var sequences = [];
+           var images = [];
 
-           if (firstToLastDistanceMeters < 0.75) {
-             testNodes = nodes.slice(); // shallow copy
+           if (context.photos().showsFlat()) {
+             sequences = service ? service.sequences(projection) : [];
+             images = service && showMarkers ? service.images(projection) : [];
+             sequences = filterSequences(sequences);
+             images = filterImages(images);
+           }
 
-             testNodes.pop();
-             testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
+           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
+             return d.properties.key;
+           }); // exit
 
-             if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-               return function (context) {
-                 var way = context.entity(this.issue.entityIds[0]);
-                 context.perform(actionMergeNodes([way.nodes[0], way.nodes[way.nodes.length - 1]], nodes[0].loc), _t('issues.fix.connect_endpoints.annotation'));
-               };
-             }
-           } // if the points were not merged, attempt to close the way
+           traces.exit().remove(); // enter/update
 
+           traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
+           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
+             return d.key;
+           }); // exit
 
-           testNodes = nodes.slice(); // shallow copy
+           groups.exit().remove(); // enter
 
-           testNodes.push(testNodes[0]); // make sure this will not create a self-intersection
+           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
+           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-           if (!geoHasSelfIntersections(testNodes, testNodes[0].id)) {
-             return function (context) {
-               var wayId = this.issue.entityIds[0];
-               var way = context.entity(wayId);
-               var nodeId = way.nodes[0];
-               var index = way.nodes.length;
-               context.perform(actionAddVertex(wayId, nodeId, index), _t('issues.fix.connect_endpoints.annotation'));
-             };
-           }
+           var markers = groups.merge(groupsEnter).sort(function (a, b) {
+             return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1]; // sort Y
+           }).attr('transform', transform).select('.viewfield-scale');
+           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
+           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
+           viewfields.exit().remove();
+           viewfields.enter() // viewfields may or may not be drawn...
+           .insert('path', 'circle') // but if they are, draw below the circles
+           .attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
          }
 
-         function lineTaggedAsAreaIssue(entity) {
-           var tagSuggestingArea = tagSuggestingLineIsArea(entity);
-           if (!tagSuggestingArea) return null;
-           return new validationIssue({
-             type: type,
-             subtype: 'area_as_line',
-             severity: 'warning',
-             message: function message(context) {
-               var entity = context.hasEntity(this.entityIds[0]);
-               return entity ? _t.html('issues.tag_suggests_area.message', {
-                 feature: utilDisplayLabel(entity, 'area'),
-                 tag: utilTagText({
-                   tags: tagSuggestingArea
-                 })
-               }) : '';
-             },
-             reference: showReference,
-             entityIds: [entity.id],
-             hash: JSON.stringify(tagSuggestingArea),
-             dynamicFixes: function dynamicFixes(context) {
-               var fixes = [];
-               var entity = context.entity(this.entityIds[0]);
-               var connectEndsOnClick = makeConnectEndpointsFixOnClick(entity, context.graph());
-               fixes.push(new validationIssueFix({
-                 title: _t.html('issues.fix.connect_endpoints.title'),
-                 onClick: connectEndsOnClick
-               }));
-               fixes.push(new validationIssueFix({
-                 icon: 'iD-operation-delete',
-                 title: _t.html('issues.fix.remove_tag.title'),
-                 onClick: function onClick(context) {
-                   var entityId = this.issue.entityIds[0];
-                   var entity = context.entity(entityId);
-                   var tags = Object.assign({}, entity.tags); // shallow copy
-
-                   for (var key in tagSuggestingArea) {
-                     delete tags[key];
-                   }
+         function drawImages(selection) {
+           var enabled = svgKartaviewImages.enabled,
+               service = getService();
+           layer = selection.selectAll('.layer-kartaview').data(service ? [0] : []);
+           layer.exit().remove();
+           var layerEnter = layer.enter().append('g').attr('class', 'layer-kartaview').style('display', enabled ? 'block' : 'none');
+           layerEnter.append('g').attr('class', 'sequences');
+           layerEnter.append('g').attr('class', 'markers');
+           layer = layerEnter.merge(layer);
 
-                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_tag.annotation'));
-                 }
-               }));
-               return fixes;
+           if (enabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               update();
+               service.loadImages(projection);
+             } else {
+               editOff();
              }
-           });
-
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.tag_suggests_area.reference'));
            }
          }
 
-         function vertexTaggedAsPointIssue(entity, graph) {
-           // we only care about nodes
-           if (entity.type !== 'node') return null; // ignore tagless points
+         drawImages.enabled = function (_) {
+           if (!arguments.length) return svgKartaviewImages.enabled;
+           svgKartaviewImages.enabled = _;
 
-           if (Object.keys(entity.tags).length === 0) return null; // address lines are special so just ignore them
+           if (svgKartaviewImages.enabled) {
+             showLayer();
+             context.photos().on('change.kartaview_images', update);
+           } else {
+             hideLayer();
+             context.photos().on('change.kartaview_images', null);
+           }
 
-           if (entity.isOnAddressLine(graph)) return null;
-           var geometry = entity.geometry(graph);
-           var allowedGeometries = osmNodeGeometriesForTags(entity.tags);
+           dispatch.call('change');
+           return this;
+         };
 
-           if (geometry === 'point' && !allowedGeometries.point && allowedGeometries.vertex) {
-             return new validationIssue({
-               type: type,
-               subtype: 'vertex_as_point',
-               severity: 'warning',
-               message: function message(context) {
-                 var entity = context.hasEntity(this.entityIds[0]);
-                 return entity ? _t.html('issues.vertex_as_point.message', {
-                   feature: utilDisplayLabel(entity, 'vertex')
-                 }) : '';
-               },
-               reference: function showReference(selection) {
-                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.vertex_as_point.reference'));
-               },
-               entityIds: [entity.id]
-             });
-           } else if (geometry === 'vertex' && !allowedGeometries.vertex && allowedGeometries.point) {
-             return new validationIssue({
-               type: type,
-               subtype: 'point_as_vertex',
-               severity: 'warning',
-               message: function message(context) {
-                 var entity = context.hasEntity(this.entityIds[0]);
-                 return entity ? _t.html('issues.point_as_vertex.message', {
-                   feature: utilDisplayLabel(entity, 'point')
-                 }) : '';
-               },
-               reference: function showReference(selection) {
-                 selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.point_as_vertex.reference'));
-               },
-               entityIds: [entity.id],
-               dynamicFixes: function dynamicFixes(context) {
-                 var entityId = this.entityIds[0];
-                 var extractOnClick = null;
-
-                 if (!context.hasHiddenConnections(entityId)) {
-                   extractOnClick = function extractOnClick(context) {
-                     var entityId = this.issue.entityIds[0];
-                     var action = actionExtract(entityId);
-                     context.perform(action, _t('operations.extract.annotation', {
-                       n: 1
-                     })); // re-enter mode to trigger updates
-
-                     context.enter(modeSelect(context, [action.getExtractedNodeID()]));
-                   };
-                 }
+         drawImages.supported = function () {
+           return !!getService();
+         };
 
-                 return [new validationIssueFix({
-                   icon: 'iD-operation-extract',
-                   title: _t.html('issues.fix.extract_point.title'),
-                   onClick: extractOnClick
-                 })];
-               }
-             });
-           }
+         init();
+         return drawImages;
+       }
 
-           return null;
-         }
+       function svgOsm(projection, context, dispatch) {
+         var enabled = true;
 
-         function unclosedMultipolygonPartIssues(entity, graph) {
-           if (entity.type !== 'relation' || !entity.isMultipolygon() || entity.isDegenerate() || // cannot determine issues for incompletely-downloaded relations
-           !entity.isComplete(graph)) return null;
-           var sequences = osmJoinWays(entity.members, graph);
-           var issues = [];
+         function drawOsm(selection) {
+           selection.selectAll('.layer-osm').data(['covered', 'areas', 'lines', 'points', 'labels']).enter().append('g').attr('class', function (d) {
+             return 'layer-osm ' + d;
+           });
+           selection.selectAll('.layer-osm.points').selectAll('.points-group').data(['points', 'midpoints', 'vertices', 'turns']).enter().append('g').attr('class', function (d) {
+             return 'points-group ' + d;
+           });
+         }
 
-           for (var i in sequences) {
-             var sequence = sequences[i];
-             if (!sequence.nodes) continue;
-             var firstNode = sequence.nodes[0];
-             var lastNode = sequence.nodes[sequence.nodes.length - 1]; // part is closed if the first and last nodes are the same
+         function showLayer() {
+           var layer = context.surface().selectAll('.data-layer.osm');
+           layer.interrupt();
+           layer.classed('disabled', false).style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             dispatch.call('change');
+           });
+         }
 
-             if (firstNode === lastNode) continue;
-             var issue = new validationIssue({
-               type: type,
-               subtype: 'unclosed_multipolygon_part',
-               severity: 'warning',
-               message: function message(context) {
-                 var entity = context.hasEntity(this.entityIds[0]);
-                 return entity ? _t.html('issues.unclosed_multipolygon_part.message', {
-                   feature: utilDisplayLabel(entity, context.graph())
-                 }) : '';
-               },
-               reference: showReference,
-               loc: sequence.nodes[0].loc,
-               entityIds: [entity.id],
-               hash: sequence.map(function (way) {
-                 return way.id;
-               }).join()
-             });
-             issues.push(issue);
-           }
+         function hideLayer() {
+           var layer = context.surface().selectAll('.data-layer.osm');
+           layer.interrupt();
+           layer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             layer.classed('disabled', true);
+             dispatch.call('change');
+           });
+         }
 
-           return issues;
+         drawOsm.enabled = function (val) {
+           if (!arguments.length) return enabled;
+           enabled = val;
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unclosed_multipolygon_part.reference'));
+           if (enabled) {
+             showLayer();
+           } else {
+             hideLayer();
            }
-         }
 
-         var validation = function checkMismatchedGeometry(entity, graph) {
-           var issues = [vertexTaggedAsPointIssue(entity, graph), lineTaggedAsAreaIssue(entity)];
-           issues = issues.concat(unclosedMultipolygonPartIssues(entity, graph));
-           return issues.filter(Boolean);
+           dispatch.call('change');
+           return this;
          };
 
-         validation.type = type;
-         return validation;
+         return drawOsm;
        }
 
-       function validationMissingRole() {
-         var type = 'missing_role';
+       var _notesEnabled = false;
 
-         var validation = function checkMissingRole(entity, graph) {
-           var issues = [];
+       var _osmService;
 
-           if (entity.type === 'way') {
-             graph.parentRelations(entity).forEach(function (relation) {
-               if (!relation.isMultipolygon()) return;
-               var member = relation.memberById(entity.id);
+       function svgNotes(projection, context, dispatch) {
+         if (!dispatch) {
+           dispatch = dispatch$8('change');
+         }
 
-               if (member && isMissingRole(member)) {
-                 issues.push(makeIssue(entity, relation, member));
-               }
-             });
-           } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-             entity.indexedMembers().forEach(function (member) {
-               var way = graph.hasEntity(member.id);
+         var throttledRedraw = throttle(function () {
+           dispatch.call('change');
+         }, 1000);
 
-               if (way && isMissingRole(member)) {
-                 issues.push(makeIssue(way, entity, member));
-               }
-             });
-           }
+         var minZoom = 12;
+         var touchLayer = select(null);
+         var drawLayer = select(null);
+         var _notesVisible = false;
 
-           return issues;
-         };
+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-8, -22)').attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
+         } // Loosely-coupled osm service for fetching notes.
 
-         function isMissingRole(member) {
-           return !member.role || !member.role.trim().length;
-         }
 
-         function makeIssue(way, relation, member) {
-           return new validationIssue({
-             type: type,
-             severity: 'warning',
-             message: function message(context) {
-               var member = context.hasEntity(this.entityIds[1]),
-                   relation = context.hasEntity(this.entityIds[0]);
-               return member && relation ? _t.html('issues.missing_role.message', {
-                 member: utilDisplayLabel(member, context.graph()),
-                 relation: utilDisplayLabel(relation, context.graph())
-               }) : '';
-             },
-             reference: showReference,
-             entityIds: [relation.id, way.id],
-             data: {
-               member: member
-             },
-             hash: member.index.toString(),
-             dynamicFixes: function dynamicFixes() {
-               return [makeAddRoleFix('inner'), makeAddRoleFix('outer'), new validationIssueFix({
-                 icon: 'iD-operation-delete',
-                 title: _t.html('issues.fix.remove_from_relation.title'),
-                 onClick: function onClick(context) {
-                   context.perform(actionDeleteMember(this.issue.entityIds[0], this.issue.data.member.index), _t('operations.delete_member.annotation', {
-                     n: 1
-                   }));
-                 }
-               })];
-             }
-           });
+         function getService() {
+           if (services.osm && !_osmService) {
+             _osmService = services.osm;
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.missing_role.multipolygon.reference'));
+             _osmService.on('loadedNotes', throttledRedraw);
+           } else if (!services.osm && _osmService) {
+             _osmService = null;
            }
-         }
 
-         function makeAddRoleFix(role) {
-           return new validationIssueFix({
-             title: _t.html('issues.fix.set_as_' + role + '.title'),
-             onClick: function onClick(context) {
-               var oldMember = this.issue.data.member;
-               var member = {
-                 id: this.issue.entityIds[1],
-                 type: oldMember.type,
-                 role: role
-               };
-               context.perform(actionChangeMember(this.issue.entityIds[0], member, oldMember.index), _t('operations.change_role.annotation', {
-                 n: 1
-               }));
-             }
-           });
-         }
+           return _osmService;
+         } // Show the notes
 
-         validation.type = type;
-         return validation;
-       }
 
-       function validationMissingTag(context) {
-         var type = 'missing_tag';
+         function editOn() {
+           if (!_notesVisible) {
+             _notesVisible = true;
+             drawLayer.style('display', 'block');
+           }
+         } // Immediately remove the notes and their touch targets
 
-         function hasDescriptiveTags(entity, graph) {
-           var keys = Object.keys(entity.tags).filter(function (k) {
-             if (k === 'area' || k === 'name') {
-               return false;
-             } else {
-               return osmIsInterestingTag(k);
-             }
-           });
 
-           if (entity.type === 'relation' && keys.length === 1 && entity.tags.type === 'multipolygon') {
-             // this relation's only interesting tag just says its a multipolygon,
-             // which is not descriptive enough
-             // It's okay for a simple multipolygon to have no descriptive tags
-             // if its outer way has them (old model, see `outdated_tags.js`)
-             return osmOldMultipolygonOuterMemberOfRelation(entity, graph);
+         function editOff() {
+           if (_notesVisible) {
+             _notesVisible = false;
+             drawLayer.style('display', 'none');
+             drawLayer.selectAll('.note').remove();
+             touchLayer.selectAll('.note').remove();
            }
+         } // Enable the layer.  This shows the notes and transitions them to visible.
 
-           return keys.length > 0;
-         }
-
-         function isUnknownRoad(entity) {
-           return entity.type === 'way' && entity.tags.highway === 'road';
-         }
 
-         function isUntypedRelation(entity) {
-           return entity.type === 'relation' && !entity.tags.type;
-         }
+         function layerOn() {
+           editOn();
+           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
+             dispatch.call('change');
+           });
+         } // Disable the layer.  This transitions the layer invisible and then hides the notes.
 
-         var validation = function checkMissingTag(entity, graph) {
-           var subtype;
-           var osm = context.connection();
-           var isUnloadedNode = entity.type === 'node' && osm && !osm.isDataLoaded(entity.loc); // we can't know if the node is a vertex if the tile is undownloaded
 
-           if (!isUnloadedNode && // allow untagged nodes that are part of ways
-           entity.geometry(graph) !== 'vertex' && // allow untagged entities that are part of relations
-           !entity.hasParentRelations(graph)) {
-             if (Object.keys(entity.tags).length === 0) {
-               subtype = 'any';
-             } else if (!hasDescriptiveTags(entity, graph)) {
-               subtype = 'descriptive';
-             } else if (isUntypedRelation(entity)) {
-               subtype = 'relation_type';
-             }
-           } // flag an unknown road even if it's a member of a relation
+         function layerOff() {
+           throttledRedraw.cancel();
+           drawLayer.interrupt();
+           touchLayer.selectAll('.note').remove();
+           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
+             editOff();
+             dispatch.call('change');
+           });
+         } // Update the note markers
 
 
-           if (!subtype && isUnknownRoad(entity)) {
-             subtype = 'highway_classification';
-           }
+         function updateMarkers() {
+           if (!_notesVisible || !_notesEnabled) return;
+           var service = getService();
+           var selectedID = context.selectedNoteID();
+           var data = service ? service.notes(projection) : [];
+           var getTransform = svgPointTransform(projection); // Draw markers..
 
-           if (!subtype) return [];
-           var messageID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag.' + subtype;
-           var referenceID = subtype === 'highway_classification' ? 'unknown_road' : 'missing_tag'; // can always delete if the user created it in the first place..
+           var notes = drawLayer.selectAll('.note').data(data, function (d) {
+             return d.status + d.id;
+           }); // exit
 
-           var canDelete = entity.version === undefined || entity.v !== undefined;
-           var severity = canDelete && subtype !== 'highway_classification' ? 'error' : 'warning';
-           return [new validationIssue({
-             type: type,
-             subtype: subtype,
-             severity: severity,
-             message: function message(context) {
-               var entity = context.hasEntity(this.entityIds[0]);
-               return entity ? _t.html('issues.' + messageID + '.message', {
-                 feature: utilDisplayLabel(entity, context.graph())
-               }) : '';
-             },
-             reference: showReference,
-             entityIds: [entity.id],
-             dynamicFixes: function dynamicFixes(context) {
-               var fixes = [];
-               var selectFixType = subtype === 'highway_classification' ? 'select_road_type' : 'select_preset';
-               fixes.push(new validationIssueFix({
-                 icon: 'iD-icon-search',
-                 title: _t.html('issues.fix.' + selectFixType + '.title'),
-                 onClick: function onClick(context) {
-                   context.ui().sidebar.showPresetList();
-                 }
-               }));
-               var deleteOnClick;
-               var id = this.entityIds[0];
-               var operation = operationDelete(context, [id]);
-               var disabledReasonID = operation.disabled();
+           notes.exit().remove(); // enter
 
-               if (!disabledReasonID) {
-                 deleteOnClick = function deleteOnClick(context) {
-                   var id = this.issue.entityIds[0];
-                   var operation = operationDelete(context, [id]);
+           var notesEnter = notes.enter().append('g').attr('class', function (d) {
+             return 'note note-' + d.id + ' ' + d.status;
+           }).classed('new', function (d) {
+             return d.id < 0;
+           });
+           notesEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+           notesEnter.append('path').call(markerPath, 'shadow');
+           notesEnter.append('use').attr('class', 'note-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-note');
+           notesEnter.selectAll('.icon-annotation').data(function (d) {
+             return [d];
+           }).enter().append('use').attr('class', 'icon-annotation').attr('width', '10px').attr('height', '10px').attr('x', '-3px').attr('y', '-19px').attr('xlink:href', function (d) {
+             if (d.id < 0) return '#iD-icon-plus';
+             if (d.status === 'open') return '#iD-icon-close';
+             return '#iD-icon-apply';
+           }); // update
 
-                   if (!operation.disabled()) {
-                     operation();
-                   }
-                 };
-               }
+           notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
+             var mode = context.mode();
+             var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
 
-               fixes.push(new validationIssueFix({
-                 icon: 'iD-operation-delete',
-                 title: _t.html('issues.fix.delete_feature.title'),
-                 disabledReason: disabledReasonID ? _t('operations.delete.' + disabledReasonID + '.single') : undefined,
-                 onClick: deleteOnClick
-               }));
-               return fixes;
-             }
-           })];
+             return !isMoving && d.id === selectedID;
+           }).attr('transform', getTransform); // Draw targets..
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.' + referenceID + '.reference'));
-           }
-         };
+           if (touchLayer.empty()) return;
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var targets = touchLayer.selectAll('.note').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-         validation.type = type;
-         return validation;
-       }
+           targets.exit().remove(); // enter/update
 
-       var simplify = function simplify(str) {
-         return diacritics.remove(str.replace(/&/g, 'and').replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
-       };
+           targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
+             var newClass = d.id < 0 ? 'new' : '';
+             return 'note target note-' + d.id + ' ' + fillClass + newClass;
+           }).attr('transform', getTransform);
 
-       // {
-       //   kvnd:        "amenity/fast_food|Thaï Express~(North America)",
-       //   kvn:         "amenity/fast_food|Thaï Express",
-       //   kv:          "amenity/fast_food",
-       //   k:           "amenity",
-       //   v:           "fast_food",
-       //   n:           "Thaï Express",
-       //   d:           "(North America)",
-       //   nsimple:     "thaiexpress",
-       //   kvnnsimple:  "amenity/fast_food|thaiexpress"
-       // }
+           function sortY(a, b) {
+             if (a.id === selectedID) return 1;
+             if (b.id === selectedID) return -1;
+             return b.loc[1] - a.loc[1];
+           }
+         } // Draw the notes layer and schedule loading notes and updating markers.
 
-       var to_parts = function to_parts(kvnd) {
-         var parts = {};
-         parts.kvnd = kvnd;
-         var kvndparts = kvnd.split('~', 2);
-         if (kvndparts.length > 1) parts.d = kvndparts[1];
-         parts.kvn = kvndparts[0];
-         var kvnparts = parts.kvn.split('|', 2);
-         if (kvnparts.length > 1) parts.n = kvnparts[1];
-         parts.kv = kvnparts[0];
-         var kvparts = parts.kv.split('/', 2);
-         parts.k = kvparts[0];
-         parts.v = kvparts[1];
-         parts.nsimple = simplify(parts.n);
-         parts.kvnsimple = parts.kv + '|' + parts.nsimple;
-         return parts;
-       };
 
-       var matchGroups = {adult_gaming_centre:["amenity/casino","amenity/gambling","leisure/adult_gaming_centre"],beauty:["shop/beauty","shop/hairdresser_supply"],bed:["shop/bed","shop/furniture"],beverages:["shop/alcohol","shop/beverages"],camping:["leisure/park","tourism/camp_site","tourism/caravan_site"],car_parts:["shop/car_parts","shop/car_repair","shop/tires","shop/tyres"],confectionery:["shop/candy","shop/chocolate","shop/confectionery"],convenience:["shop/beauty","shop/chemist","shop/convenience","shop/cosmetics","shop/newsagent"],coworking:["amenity/coworking_space","office/coworking","office/coworking_space"],electronics:["office/telecommunication","shop/computer","shop/electronics","shop/hifi","shop/mobile","shop/mobile_phone","shop/telecommunication"],fashion:["shop/accessories","shop/bag","shop/botique","shop/clothes","shop/department_store","shop/fashion","shop/fashion_accessories","shop/sports","shop/shoes"],financial:["amenity/bank","office/accountant","office/financial","office/financial_advisor","office/tax_advisor","shop/tax"],fitness:["leisure/fitness_centre","leisure/fitness_center","leisure/sports_centre","leisure/sports_center"],food:["amenity/cafe","amenity/fast_food","amenity/ice_cream","amenity/restaurant","shop/bakery","shop/ice_cream","shop/pastry","shop/tea","shop/coffee"],fuel:["amenity/fuel","shop/gas","shop/convenience;gas","shop/gas;convenience"],gift:["shop/gift","shop/card","shop/cards","shop/stationery"],hardware:["shop/carpet","shop/diy","shop/doityourself","shop/doors","shop/electrical","shop/flooring","shop/hardware","shop/power_tools","shop/tool_hire","shop/tools","shop/trade"],health_food:["shop/health","shop/health_food","shop/herbalist","shop/nutrition_supplements"],houseware:["shop/houseware","shop/interior_decoration"],lodging:["tourism/hotel","tourism/motel"],money_transfer:["amenity/money_transfer","shop/money_transfer"],outdoor:["shop/outdoor","shop/sports"],rental:["amenity/bicycle_rental","amenity/boat_rental","amenity/car_rental","amenity/truck_rental","amenity/vehicle_rental","shop/rental"],school:["amenity/childcare","amenity/college","amenity/kindergarten","amenity/language_school","amenity/prep_school","amenity/school","amenity/university"],supermarket:["shop/food","shop/frozen_food","shop/greengrocer","shop/grocery","shop/supermarket","shop/wholesale"],variety_store:["shop/variety_store","shop/supermarket","shop/discount","shop/convenience"],vending:["amenity/vending_machine","shop/vending_machine"],wholesale:["shop/wholesale","shop/supermarket","shop/department_store"]};
-       var require$$0 = {
-       matchGroups: matchGroups
-       };
+         function drawNotes(selection) {
+           var service = getService();
+           var surface = context.surface();
 
-       var matchGroups$1 = require$$0.matchGroups;
+           if (surface && !surface.empty()) {
+             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           }
 
-       var matcher$1 = function matcher() {
-         var _warnings = []; // array of match conflict pairs
+           drawLayer = selection.selectAll('.layer-notes').data(service ? [0] : []);
+           drawLayer.exit().remove();
+           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-notes').style('display', _notesEnabled ? 'block' : 'none').merge(drawLayer);
 
-         var _ambiguous = {};
-         var _matchIndex = {};
-         var matcher = {}; // Create an index of all the keys/simplenames for fast matching
+           if (_notesEnabled) {
+             if (service && ~~context.map().zoom() >= minZoom) {
+               editOn();
+               service.loadNotes(projection);
+               updateMarkers();
+             } else {
+               editOff();
+             }
+           }
+         } // Toggles the layer on and off
 
-         matcher.buildMatchIndex = function (brands) {
-           // two passes - once for primary names, once for secondary/alternate names
-           Object.keys(brands).forEach(function (kvnd) {
-             return insertNames(kvnd, 'primary');
-           });
-           Object.keys(brands).forEach(function (kvnd) {
-             return insertNames(kvnd, 'secondary');
-           });
 
-           function insertNames(kvnd, which) {
-             var obj = brands[kvnd];
-             var parts = to_parts(kvnd); // Exit early for ambiguous names in the second pass.
-             // They were collected in the first pass and we don't gather alt names for them.
+         drawNotes.enabled = function (val) {
+           if (!arguments.length) return _notesEnabled;
+           _notesEnabled = val;
 
-             if (which === 'secondary' && parts.d) return;
+           if (_notesEnabled) {
+             layerOn();
+           } else {
+             layerOff();
 
-             if (obj.countryCodes) {
-               parts.countryCodes = obj.countryCodes.slice(); // copy
+             if (context.selectedNoteID()) {
+               context.enter(modeBrowse(context));
              }
+           }
 
-             var nomatches = obj.nomatch || [];
+           dispatch.call('change');
+           return this;
+         };
 
-             if (nomatches.some(function (s) {
-               return s === kvnd;
-             })) {
-               console.log("WARNING match/nomatch conflict for ".concat(kvnd));
-               return;
-             }
+         return drawNotes;
+       }
 
-             var match_kv = [parts.kv].concat(obj.matchTags || []).concat(["".concat(parts.k, "/yes"), "building/yes"]) // #3454 - match some generic tags
-             .map(function (s) {
-               return s.toLowerCase();
-             });
-             var match_nsimple = [];
+       function svgTouch() {
+         function drawTouch(selection) {
+           selection.selectAll('.layer-touch').data(['areas', 'lines', 'points', 'turns', 'markers']).enter().append('g').attr('class', function (d) {
+             return 'layer-touch ' + d;
+           });
+         }
 
-             if (which === 'primary') {
-               match_nsimple = [parts.n].concat(obj.matchNames || []).concat(obj.tags.official_name || []) // #2732 - match alternate names
-               .map(simplify);
-             } else if (which === 'secondary') {
-               match_nsimple = [].concat(obj.tags.alt_name || []) // #2732 - match alternate names
-               .concat(obj.tags.short_name || []) // #2732 - match alternate names
-               .map(simplify);
-             }
+         return drawTouch;
+       }
+
+       function refresh(selection, node) {
+         var cr = node.getBoundingClientRect();
+         var prop = [cr.width, cr.height];
+         selection.property('__dimensions__', prop);
+         return prop;
+       }
 
-             if (!match_nsimple.length) return; // nothing to do
+       function utilGetDimensions(selection, force) {
+         if (!selection || selection.empty()) {
+           return [0, 0];
+         }
 
-             match_kv.forEach(function (kv) {
-               match_nsimple.forEach(function (nsimple) {
-                 if (parts.d) {
-                   // Known ambiguous names with disambiguation string ~(USA) / ~(Canada)
-                   // FIXME: Name collisions will overwrite the initial entry (ok for now)
-                   if (!_ambiguous[kv]) _ambiguous[kv] = {};
-                   _ambiguous[kv][nsimple] = parts;
-                 } else {
-                   // Names we mostly expect to be unique..
-                   if (!_matchIndex[kv]) _matchIndex[kv] = {};
-                   var m = _matchIndex[kv][nsimple];
-
-                   if (m) {
-                     // There already is a match for this name, skip it
-                     // Warn if we detect collisions in a primary name.
-                     // Skip warning if a secondary name or a generic `*=yes` tag - #2972 / #3454
-                     if (which === 'primary' && !/\/yes$/.test(kv)) {
-                       _warnings.push([m.kvnd, "".concat(kvnd, " (").concat(kv, "/").concat(nsimple, ")")]);
-                     }
-                   } else {
-                     _matchIndex[kv][nsimple] = parts; // insert
-                   }
-                 }
-               });
-             });
-           }
-         }; // pass a `key`, `value`, `name` and return the best match,
-         // `countryCode` optional (if supplied, must match that too)
+         var node = selection.node(),
+             cached = selection.property('__dimensions__');
+         return !cached || force ? refresh(selection, node) : cached;
+       }
+       function utilSetDimensions(selection, dimensions) {
+         if (!selection || selection.empty()) {
+           return selection;
+         }
 
+         var node = selection.node();
 
-         matcher.matchKVN = function (key, value, name, countryCode) {
-           return matcher.matchParts(to_parts("".concat(key, "/").concat(value, "|").concat(name)), countryCode);
-         }; // pass a parts object and return the best match,
-         // `countryCode` optional (if supplied, must match that too)
+         if (dimensions === null) {
+           refresh(selection, node);
+           return selection;
+         }
 
+         return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
+       }
 
-         matcher.matchParts = function (parts, countryCode) {
-           var match = null;
-           var inGroup = false; // fixme: we currently return a single match for ambiguous
+       function svgLayers(projection, context) {
+         var dispatch = dispatch$8('change');
+         var svg = select(null);
+         var _layers = [{
+           id: 'osm',
+           layer: svgOsm(projection, context, dispatch)
+         }, {
+           id: 'notes',
+           layer: svgNotes(projection, context, dispatch)
+         }, {
+           id: 'data',
+           layer: svgData(projection, context, dispatch)
+         }, {
+           id: 'keepRight',
+           layer: svgKeepRight(projection, context, dispatch)
+         }, {
+           id: 'improveOSM',
+           layer: svgImproveOSM(projection, context, dispatch)
+         }, {
+           id: 'osmose',
+           layer: svgOsmose(projection, context, dispatch)
+         }, {
+           id: 'streetside',
+           layer: svgStreetside(projection, context, dispatch)
+         }, {
+           id: 'mapillary',
+           layer: svgMapillaryImages(projection, context, dispatch)
+         }, {
+           id: 'mapillary-position',
+           layer: svgMapillaryPosition(projection, context)
+         }, {
+           id: 'mapillary-map-features',
+           layer: svgMapillaryMapFeatures(projection, context, dispatch)
+         }, {
+           id: 'mapillary-signs',
+           layer: svgMapillarySigns(projection, context, dispatch)
+         }, {
+           id: 'kartaview',
+           layer: svgKartaviewImages(projection, context, dispatch)
+         }, {
+           id: 'debug',
+           layer: svgDebug(projection, context)
+         }, {
+           id: 'geolocate',
+           layer: svgGeolocate(projection)
+         }, {
+           id: 'touch',
+           layer: svgTouch()
+         }];
 
-           match = _ambiguous[parts.kv] && _ambiguous[parts.kv][parts.nsimple];
-           if (match && matchesCountryCode(match)) return match; // try to return an exact match
+         function drawLayers(selection) {
+           svg = selection.selectAll('.surface').data([0]);
+           svg = svg.enter().append('svg').attr('class', 'surface').merge(svg);
+           var defs = svg.selectAll('.surface-defs').data([0]);
+           defs.enter().append('defs').attr('class', 'surface-defs');
+           var groups = svg.selectAll('.data-layer').data(_layers);
+           groups.exit().remove();
+           groups.enter().append('g').attr('class', function (d) {
+             return 'data-layer ' + d.id;
+           }).merge(groups).each(function (d) {
+             select(this).call(d.layer);
+           });
+         }
 
-           match = _matchIndex[parts.kv] && _matchIndex[parts.kv][parts.nsimple];
-           if (match && matchesCountryCode(match)) return match; // look in match groups
+         drawLayers.all = function () {
+           return _layers;
+         };
 
-           for (var mg in matchGroups$1) {
-             var matchGroup = matchGroups$1[mg];
-             match = null;
-             inGroup = false;
+         drawLayers.layer = function (id) {
+           var obj = _layers.find(function (o) {
+             return o.id === id;
+           });
 
-             for (var i = 0; i < matchGroup.length; i++) {
-               var otherkv = matchGroup[i].toLowerCase();
+           return obj && obj.layer;
+         };
 
-               if (!inGroup) {
-                 inGroup = otherkv === parts.kv;
-               }
+         drawLayers.only = function (what) {
+           var arr = [].concat(what);
 
-               if (!match) {
-                 // fixme: we currently return a single match for ambiguous
-                 match = _ambiguous[otherkv] && _ambiguous[otherkv][parts.nsimple];
-               }
+           var all = _layers.map(function (layer) {
+             return layer.id;
+           });
 
-               if (!match) {
-                 match = _matchIndex[otherkv] && _matchIndex[otherkv][parts.nsimple];
-               }
+           return drawLayers.remove(utilArrayDifference(all, arr));
+         };
 
-               if (match && !matchesCountryCode(match)) {
-                 match = null;
-               }
+         drawLayers.remove = function (what) {
+           var arr = [].concat(what);
+           arr.forEach(function (id) {
+             _layers = _layers.filter(function (o) {
+               return o.id !== id;
+             });
+           });
+           dispatch.call('change');
+           return this;
+         };
 
-               if (inGroup && match) {
-                 return match;
-               }
+         drawLayers.add = function (what) {
+           var arr = [].concat(what);
+           arr.forEach(function (obj) {
+             if ('id' in obj && 'layer' in obj) {
+               _layers.push(obj);
              }
-           }
-
-           return null;
-
-           function matchesCountryCode(match) {
-             if (!countryCode) return true;
-             if (!match.countryCodes) return true;
-             return match.countryCodes.indexOf(countryCode) !== -1;
-           }
+           });
+           dispatch.call('change');
+           return this;
          };
 
-         matcher.getWarnings = function () {
-           return _warnings;
+         drawLayers.dimensions = function (val) {
+           if (!arguments.length) return utilGetDimensions(svg);
+           utilSetDimensions(svg, val);
+           return this;
          };
 
-         return matcher;
-       };
-
-       var fromCharCode = String.fromCharCode;
-       var nativeFromCodePoint = String.fromCodePoint;
-
-       // length should be 1, old FF problem
-       var INCORRECT_LENGTH = !!nativeFromCodePoint && nativeFromCodePoint.length != 1;
-
-       // `String.fromCodePoint` method
-       // https://tc39.github.io/ecma262/#sec-string.fromcodepoint
-       _export({ target: 'String', stat: true, forced: INCORRECT_LENGTH }, {
-         fromCodePoint: function fromCodePoint(x) { // eslint-disable-line no-unused-vars
-           var elements = [];
-           var length = arguments.length;
-           var i = 0;
-           var code;
-           while (length > i) {
-             code = +arguments[i++];
-             if (toAbsoluteIndex(code, 0x10FFFF) !== code) throw RangeError(code + ' is not a valid code point');
-             elements.push(code < 0x10000
-               ? fromCharCode(code)
-               : fromCharCode(((code -= 0x10000) >> 10) + 0xD800, code % 0x400 + 0xDC00)
-             );
-           } return elements.join('');
-         }
-       });
-
-       var quickselect$2 = createCommonjsModule(function (module, exports) {
-         (function (global, factory) {
-            module.exports = factory() ;
-         })(commonjsGlobal, function () {
+         return utilRebind(drawLayers, dispatch, 'on');
+       }
 
-           function quickselect(arr, k, left, right, compare) {
-             quickselectStep(arr, k, left || 0, right || arr.length - 1, compare || defaultCompare);
-           }
+       function svgLines(projection, context) {
+         var detected = utilDetect();
+         var highway_stack = {
+           motorway: 0,
+           motorway_link: 1,
+           trunk: 2,
+           trunk_link: 3,
+           primary: 4,
+           primary_link: 5,
+           secondary: 6,
+           tertiary: 7,
+           unclassified: 8,
+           residential: 9,
+           service: 10,
+           footway: 11
+         };
 
-           function quickselectStep(arr, k, left, right, compare) {
-             while (right > left) {
-               if (right - left > 600) {
-                 var n = right - left + 1;
-                 var m = k - left + 1;
-                 var z = Math.log(n);
-                 var s = 0.5 * Math.exp(2 * z / 3);
-                 var sd = 0.5 * Math.sqrt(z * s * (n - s) / n) * (m - n / 2 < 0 ? -1 : 1);
-                 var newLeft = Math.max(left, Math.floor(k - m * s / n + sd));
-                 var newRight = Math.min(right, Math.floor(k + (n - m) * s / n + sd));
-                 quickselectStep(arr, k, newLeft, newRight, compare);
-               }
+         function drawTargets(selection, graph, entities, filter) {
+           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+           var getPath = svgPath(projection).geojson;
+           var activeID = context.activeID();
+           var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
 
-               var t = arr[k];
-               var i = left;
-               var j = right;
-               swap(arr, left, k);
-               if (compare(arr[right], t) > 0) swap(arr, left, right);
+           var data = {
+             targets: [],
+             nopes: []
+           };
+           entities.forEach(function (way) {
+             var features = svgSegmentWay(way, graph, activeID);
+             data.targets.push.apply(data.targets, features.passive);
+             data.nopes.push.apply(data.nopes, features.active);
+           }); // Targets allow hover and vertex snapping
 
-               while (i < j) {
-                 swap(arr, i, j);
-                 i++;
-                 j--;
+           var targetData = data.targets.filter(getPath);
+           var targets = selection.selectAll('.line.target-allowed').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(targetData, function key(d) {
+             return d.id;
+           }); // exit
 
-                 while (compare(arr[i], t) < 0) {
-                   i++;
-                 }
+           targets.exit().remove();
 
-                 while (compare(arr[j], t) > 0) {
-                   j--;
-                 }
-               }
+           var segmentWasEdited = function segmentWasEdited(d) {
+             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
 
-               if (compare(arr[left], t) === 0) swap(arr, left, j);else {
-                 j++;
-                 swap(arr, j, right);
-               }
-               if (j <= k) left = j + 1;
-               if (k <= j) right = j - 1;
+             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
+               return false;
              }
-           }
-
-           function swap(arr, i, j) {
-             var tmp = arr[i];
-             arr[i] = arr[j];
-             arr[j] = tmp;
-           }
 
-           function defaultCompare(a, b) {
-             return a < b ? -1 : a > b ? 1 : 0;
-           }
+             return d.properties.nodes.some(function (n) {
+               return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
+             });
+           }; // enter/update
 
-           return quickselect;
-         });
-       });
 
-       var rbush_1 = rbush;
-       var _default$2 = rbush;
+           targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
+             return 'way line target target-allowed ' + targetClass + d.id;
+           }).classed('segment-edited', segmentWasEdited); // NOPE
 
-       function rbush(maxEntries, format) {
-         if (!(this instanceof rbush)) return new rbush(maxEntries, format); // max entries in a node is 9 by default; min node fill is 40% for best performance
+           var nopeData = data.nopes.filter(getPath);
+           var nopes = selection.selectAll('.line.target-nope').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(nopeData, function key(d) {
+             return d.id;
+           }); // exit
 
-         this._maxEntries = Math.max(4, maxEntries || 9);
-         this._minEntries = Math.max(2, Math.ceil(this._maxEntries * 0.4));
+           nopes.exit().remove(); // enter/update
 
-         if (format) {
-           this._initFormat(format);
+           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
+             return 'way line target target-nope ' + nopeClass + d.id;
+           }).classed('segment-edited', segmentWasEdited);
          }
 
-         this.clear();
-       }
+         function drawLines(selection, graph, entities, filter) {
+           var base = context.history().base();
 
-       rbush.prototype = {
-         all: function all() {
-           return this._all(this.data, []);
-         },
-         search: function search(bbox) {
-           var node = this.data,
-               result = [],
-               toBBox = this.toBBox;
-           if (!intersects$1(bbox, node)) return result;
-           var nodesToSearch = [],
-               i,
-               len,
-               child,
-               childBBox;
+           function waystack(a, b) {
+             var selected = context.selectedIDs();
+             var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
+             var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;
 
-           while (node) {
-             for (i = 0, len = node.children.length; i < len; i++) {
-               child = node.children[i];
-               childBBox = node.leaf ? toBBox(child) : child;
+             if (a.tags.highway) {
+               scoreA -= highway_stack[a.tags.highway];
+             }
 
-               if (intersects$1(bbox, childBBox)) {
-                 if (node.leaf) result.push(child);else if (contains$1(bbox, childBBox)) this._all(child, result);else nodesToSearch.push(child);
-               }
+             if (b.tags.highway) {
+               scoreB -= highway_stack[b.tags.highway];
              }
 
-             node = nodesToSearch.pop();
+             return scoreA - scoreB;
            }
 
-           return result;
-         },
-         collides: function collides(bbox) {
-           var node = this.data,
-               toBBox = this.toBBox;
-           if (!intersects$1(bbox, node)) return false;
-           var nodesToSearch = [],
-               i,
-               len,
-               child,
-               childBBox;
+           function drawLineGroup(selection, klass, isSelected) {
+             // Note: Don't add `.selected` class in draw modes
+             var mode = context.mode();
+             var isDrawing = mode && /^draw/.test(mode.id);
+             var selectedClass = !isDrawing && isSelected ? 'selected ' : '';
+             var lines = selection.selectAll('path').filter(filter).data(getPathData(isSelected), osmEntity.key);
+             lines.exit().remove(); // Optimization: Call expensive TagClasses only on enter selection. This
+             // works because osmEntity.key is defined to include the entity v attribute.
 
-           while (node) {
-             for (i = 0, len = node.children.length; i < len; i++) {
-               child = node.children[i];
-               childBBox = node.leaf ? toBBox(child) : child;
+             lines.enter().append('path').attr('class', function (d) {
+               var prefix = 'way line'; // if this line isn't styled by its own tags
 
-               if (intersects$1(bbox, childBBox)) {
-                 if (node.leaf || contains$1(bbox, childBBox)) return true;
-                 nodesToSearch.push(child);
+               if (!d.hasInterestingTags()) {
+                 var parentRelations = graph.parentRelations(d);
+                 var parentMultipolygons = parentRelations.filter(function (relation) {
+                   return relation.isMultipolygon();
+                 }); // and if it's a member of at least one multipolygon relation
+
+                 if (parentMultipolygons.length > 0 && // and only multipolygon relations
+                 parentRelations.length === parentMultipolygons.length) {
+                   // then fudge the classes to style this as an area edge
+                   prefix = 'relation area';
+                 }
                }
-             }
 
-             node = nodesToSearch.pop();
+               var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
+               return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
+             }).classed('added', function (d) {
+               return !base.entities[d.id];
+             }).classed('geometry-edited', function (d) {
+               return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
+             }).classed('retagged', function (d) {
+               return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+             }).call(svgTagClasses()).merge(lines).sort(waystack).attr('d', getPath).call(svgTagClasses().tags(svgRelationMemberTags(graph)));
+             return selection;
            }
 
-           return false;
-         },
-         load: function load(data) {
-           if (!(data && data.length)) return this;
-
-           if (data.length < this._minEntries) {
-             for (var i = 0, len = data.length; i < len; i++) {
-               this.insert(data[i]);
-             }
-
-             return this;
-           } // recursively build the tree with the given data from scratch using OMT algorithm
+           function getPathData(isSelected) {
+             return function () {
+               var layer = this.parentNode.__data__;
+               var data = pathdata[layer] || [];
+               return data.filter(function (d) {
+                 if (isSelected) {
+                   return context.selectedIDs().indexOf(d.id) !== -1;
+                 } else {
+                   return context.selectedIDs().indexOf(d.id) === -1;
+                 }
+               });
+             };
+           }
 
+           function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
+             var markergroup = layergroup.selectAll('g.' + groupclass).data([pathclass]);
+             markergroup = markergroup.enter().append('g').attr('class', groupclass).merge(markergroup);
+             var markers = markergroup.selectAll('path').filter(filter).data(function data() {
+               return groupdata[this.parentNode.__data__] || [];
+             }, function key(d) {
+               return [d.id, d.index];
+             });
+             markers.exit().remove();
+             markers = markers.enter().append('path').attr('class', pathclass).merge(markers).attr('marker-mid', marker).attr('d', function (d) {
+               return d.d;
+             });
 
-           var node = this._build(data.slice(), 0, data.length - 1, 0);
+             if (detected.ie) {
+               markers.each(function () {
+                 this.parentNode.insertBefore(this, this);
+               });
+             }
+           }
 
-           if (!this.data.children.length) {
-             // save as is if tree is empty
-             this.data = node;
-           } else if (this.data.height === node.height) {
-             // split root if trees have the same height
-             this._splitRoot(this.data, node);
-           } else {
-             if (this.data.height < node.height) {
-               // swap trees if inserted one is bigger
-               var tmpNode = this.data;
-               this.data = node;
-               node = tmpNode;
-             } // insert the small tree into the large tree at appropriate level
+           var getPath = svgPath(projection, graph);
+           var ways = [];
+           var onewaydata = {};
+           var sideddata = {};
+           var oldMultiPolygonOuters = {};
 
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             var outer = osmOldMultipolygonOuterMember(entity, graph);
 
-             this._insert(node, this.data.height - node.height - 1, true);
+             if (outer) {
+               ways.push(entity.mergeTags(outer.tags));
+               oldMultiPolygonOuters[outer.id] = true;
+             } else if (entity.geometry(graph) === 'line') {
+               ways.push(entity);
+             }
            }
 
-           return this;
-         },
-         insert: function insert(item) {
-           if (item) this._insert(item, this.data.height - 1);
-           return this;
-         },
-         clear: function clear() {
-           this.data = createNode$1([]);
-           return this;
-         },
-         remove: function remove(item, equalsFn) {
-           if (!item) return this;
-           var node = this.data,
-               bbox = this.toBBox(item),
-               path = [],
-               indexes = [],
-               i,
-               parent,
-               index,
-               goingUp; // depth-first iterative tree traversal
+           ways = ways.filter(getPath);
+           var pathdata = utilArrayGroupBy(ways, function (way) {
+             return way.layer();
+           });
+           Object.keys(pathdata).forEach(function (k) {
+             var v = pathdata[k];
+             var onewayArr = v.filter(function (d) {
+               return d.isOneWay();
+             });
+             var onewaySegments = svgMarkerSegments(projection, graph, 35, function shouldReverse(entity) {
+               return entity.tags.oneway === '-1';
+             }, function bothDirections(entity) {
+               return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
+             });
+             onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
+             var sidedArr = v.filter(function (d) {
+               return d.isSided();
+             });
+             var sidedSegments = svgMarkerSegments(projection, graph, 30, function shouldReverse() {
+               return false;
+             }, function bothDirections() {
+               return false;
+             });
+             sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
+           });
+           var covered = selection.selectAll('.layer-osm.covered'); // under areas
 
-           while (node || path.length) {
-             if (!node) {
-               // go up
-               node = path.pop();
-               parent = path[path.length - 1];
-               i = indexes.pop();
-               goingUp = true;
-             }
+           var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
 
-             if (node.leaf) {
-               // check current node
-               index = findItem$1(item, node.children, equalsFn);
+           var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
 
-               if (index !== -1) {
-                 // item found, remove the item and condense tree upwards
-                 node.children.splice(index, 1);
-                 path.push(node);
+           [covered, uncovered].forEach(function (selection) {
+             var range = selection === covered ? range$1(-10, 0) : range$1(0, 11);
+             var layergroup = selection.selectAll('g.layergroup').data(range);
+             layergroup = layergroup.enter().append('g').attr('class', function (d) {
+               return 'layergroup layer' + String(d);
+             }).merge(layergroup);
+             layergroup.selectAll('g.linegroup').data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted']).enter().append('g').attr('class', function (d) {
+               return 'linegroup line-' + d;
+             });
+             layergroup.selectAll('g.line-shadow').call(drawLineGroup, 'shadow', false);
+             layergroup.selectAll('g.line-casing').call(drawLineGroup, 'casing', false);
+             layergroup.selectAll('g.line-stroke').call(drawLineGroup, 'stroke', false);
+             layergroup.selectAll('g.line-shadow-highlighted').call(drawLineGroup, 'shadow', true);
+             layergroup.selectAll('g.line-casing-highlighted').call(drawLineGroup, 'casing', true);
+             layergroup.selectAll('g.line-stroke-highlighted').call(drawLineGroup, 'stroke', true);
+             addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
+             addMarkers(layergroup, 'sided', 'sidedgroup', sideddata, function marker(d) {
+               var category = graph.entity(d.id).sidednessIdentifier();
+               return 'url(#ideditor-sided-marker-' + category + ')';
+             });
+           }); // Draw touch targets..
 
-                 this._condense(path);
+           touchLayer.call(drawTargets, graph, ways, filter);
+         }
 
-                 return this;
-               }
-             }
+         return drawLines;
+       }
 
-             if (!goingUp && !node.leaf && contains$1(node, bbox)) {
-               // go down
-               path.push(node);
-               indexes.push(i);
-               i = 0;
-               parent = node;
-               node = node.children[0];
-             } else if (parent) {
-               // go right
-               i++;
-               node = parent.children[i];
-               goingUp = false;
-             } else node = null; // nothing found
+       function svgMidpoints(projection, context) {
+         var targetRadius = 8;
 
-           }
+         function drawTargets(selection, graph, entities, filter) {
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var getTransform = svgPointTransform(projection).geojson;
+           var data = entities.map(function (midpoint) {
+             return {
+               type: 'Feature',
+               id: midpoint.id,
+               properties: {
+                 target: true,
+                 entity: midpoint
+               },
+               geometry: {
+                 type: 'Point',
+                 coordinates: midpoint.loc
+               }
+             };
+           });
+           var targets = selection.selectAll('.midpoint.target').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(data, function key(d) {
+             return d.id;
+           }); // exit
 
-           return this;
-         },
-         toBBox: function toBBox(item) {
-           return item;
-         },
-         compareMinX: compareNodeMinX$1,
-         compareMinY: compareNodeMinY$1,
-         toJSON: function toJSON() {
-           return this.data;
-         },
-         fromJSON: function fromJSON(data) {
-           this.data = data;
-           return this;
-         },
-         _all: function _all(node, result) {
-           var nodesToSearch = [];
+           targets.exit().remove(); // enter/update
 
-           while (node) {
-             if (node.leaf) result.push.apply(result, node.children);else nodesToSearch.push.apply(nodesToSearch, node.children);
-             node = nodesToSearch.pop();
-           }
+           targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
+             return 'node midpoint target ' + fillClass + d.id;
+           }).attr('transform', getTransform);
+         }
 
-           return result;
-         },
-         _build: function _build(items, left, right, height) {
-           var N = right - left + 1,
-               M = this._maxEntries,
-               node;
+         function drawMidpoints(selection, graph, entities, filter, extent) {
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
+           var touchLayer = selection.selectAll('.layer-touch.points');
+           var mode = context.mode();
 
-           if (N <= M) {
-             // reached leaf level; return leaf
-             node = createNode$1(items.slice(left, right + 1));
-             calcBBox$1(node, this.toBBox);
-             return node;
+           if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
+             drawLayer.selectAll('.midpoint').remove();
+             touchLayer.selectAll('.midpoint.target').remove();
+             return;
            }
 
-           if (!height) {
-             // target height of the bulk-loaded tree
-             height = Math.ceil(Math.log(N) / Math.log(M)); // target number of root entries to maximize storage utilization
+           var poly = extent.polygon();
+           var midpoints = {};
 
-             M = Math.ceil(N / Math.pow(M, height - 1));
-           }
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             if (entity.type !== 'way') continue;
+             if (!filter(entity)) continue;
+             if (context.selectedIDs().indexOf(entity.id) < 0) continue;
+             var nodes = graph.childNodes(entity);
 
-           node = createNode$1([]);
-           node.leaf = false;
-           node.height = height; // split the items into M mostly square tiles
+             for (var j = 0; j < nodes.length - 1; j++) {
+               var a = nodes[j];
+               var b = nodes[j + 1];
+               var id = [a.id, b.id].sort().join('-');
 
-           var N2 = Math.ceil(N / M),
-               N1 = N2 * Math.ceil(Math.sqrt(M)),
-               i,
-               j,
-               right2,
-               right3;
-           multiSelect$1(items, left, right, N1, this.compareMinX);
+               if (midpoints[id]) {
+                 midpoints[id].parents.push(entity);
+               } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
+                 var point = geoVecInterp(a.loc, b.loc, 0.5);
+                 var loc = null;
 
-           for (i = left; i <= right; i += N1) {
-             right2 = Math.min(i + N1 - 1, right);
-             multiSelect$1(items, i, right2, N2, this.compareMinY);
+                 if (extent.intersects(point)) {
+                   loc = point;
+                 } else {
+                   for (var k = 0; k < 4; k++) {
+                     point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);
 
-             for (j = i; j <= right2; j += N2) {
-               right3 = Math.min(j + N2 - 1, right2); // pack each entry recursively
+                     if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
+                       loc = point;
+                       break;
+                     }
+                   }
+                 }
 
-               node.children.push(this._build(items, j, right3, height - 1));
+                 if (loc) {
+                   midpoints[id] = {
+                     type: 'midpoint',
+                     id: id,
+                     loc: loc,
+                     edge: [a.id, b.id],
+                     parents: [entity]
+                   };
+                 }
+               }
              }
            }
 
-           calcBBox$1(node, this.toBBox);
-           return node;
-         },
-         _chooseSubtree: function _chooseSubtree(bbox, node, level, path) {
-           var i, len, child, targetNode, area, enlargement, minArea, minEnlargement;
-
-           while (true) {
-             path.push(node);
-             if (node.leaf || path.length - 1 === level) break;
-             minArea = minEnlargement = Infinity;
-
-             for (i = 0, len = node.children.length; i < len; i++) {
-               child = node.children[i];
-               area = bboxArea$1(child);
-               enlargement = enlargedArea$1(bbox, child) - area; // choose entry with the least area enlargement
+           function midpointFilter(d) {
+             if (midpoints[d.id]) return true;
 
-               if (enlargement < minEnlargement) {
-                 minEnlargement = enlargement;
-                 minArea = area < minArea ? area : minArea;
-                 targetNode = child;
-               } else if (enlargement === minEnlargement) {
-                 // otherwise choose one with the smallest area
-                 if (area < minArea) {
-                   minArea = area;
-                   targetNode = child;
-                 }
+             for (var i = 0; i < d.parents.length; i++) {
+               if (filter(d.parents[i])) {
+                 return true;
                }
              }
 
-             node = targetNode || node.children[0];
+             return false;
            }
 
-           return node;
-         },
-         _insert: function _insert(item, level, isNode) {
-           var toBBox = this.toBBox,
-               bbox = isNode ? item : toBBox(item),
-               insertPath = []; // find the best node for accommodating the item, saving all nodes along the path too
+           var groups = drawLayer.selectAll('.midpoint').filter(midpointFilter).data(Object.values(midpoints), function (d) {
+             return d.id;
+           });
+           groups.exit().remove();
+           var enter = groups.enter().insert('g', ':first-child').attr('class', 'midpoint');
+           enter.append('polygon').attr('points', '-6,8 10,0 -6,-8').attr('class', 'shadow');
+           enter.append('polygon').attr('points', '-3,4 5,0 -3,-4').attr('class', 'fill');
+           groups = groups.merge(enter).attr('transform', function (d) {
+             var translate = svgPointTransform(projection);
+             var a = graph.entity(d.edge[0]);
+             var b = graph.entity(d.edge[1]);
+             var angle = geoAngle(a, b, projection) * (180 / Math.PI);
+             return translate(d) + ' rotate(' + angle + ')';
+           }).call(svgTagClasses().tags(function (d) {
+             return d.parents[0].tags;
+           })); // Propagate data bindings.
 
-           var node = this._chooseSubtree(bbox, this.data, level, insertPath); // put the item into the node
+           groups.select('polygon.shadow');
+           groups.select('polygon.fill'); // Draw touch targets..
 
+           touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+         }
 
-           node.children.push(item);
-           extend$3(node, bbox); // split on node overflow; propagate upwards if necessary
+         return drawMidpoints;
+       }
 
-           while (level >= 0) {
-             if (insertPath[level].children.length > this._maxEntries) {
-               this._split(insertPath, level);
+       function svgPoints(projection, context) {
+         function markerPath(selection, klass) {
+           selection.attr('class', klass).attr('transform', 'translate(-8, -23)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+         }
 
-               level--;
-             } else break;
-           } // adjust bboxes along the insertion path
+         function sortY(a, b) {
+           return b.loc[1] - a.loc[1];
+         } // Avoid exit/enter if we're just moving stuff around.
+         // The node will get a new version but we only need to run the update selection.
 
 
-           this._adjustParentBBoxes(bbox, insertPath, level);
-         },
-         // split overflowed node into two
-         _split: function _split(insertPath, level) {
-           var node = insertPath[level],
-               M = node.children.length,
-               m = this._minEntries;
+         function fastEntityKey(d) {
+           var mode = context.mode();
+           var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+           return isMoving ? d.id : osmEntity.key(d);
+         }
 
-           this._chooseSplitAxis(node, m, M);
+         function drawTargets(selection, graph, entities, filter) {
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var getTransform = svgPointTransform(projection).geojson;
+           var activeID = context.activeID();
+           var data = [];
+           entities.forEach(function (node) {
+             if (activeID === node.id) return; // draw no target on the activeID
 
-           var splitIndex = this._chooseSplitIndex(node, m, M);
+             data.push({
+               type: 'Feature',
+               id: node.id,
+               properties: {
+                 target: true,
+                 entity: node
+               },
+               geometry: node.asGeoJSON()
+             });
+           });
+           var targets = selection.selectAll('.point.target').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(data, function key(d) {
+             return d.id;
+           }); // exit
 
-           var newNode = createNode$1(node.children.splice(splitIndex, node.children.length - splitIndex));
-           newNode.height = node.height;
-           newNode.leaf = node.leaf;
-           calcBBox$1(node, this.toBBox);
-           calcBBox$1(newNode, this.toBBox);
-           if (level) insertPath[level - 1].children.push(newNode);else this._splitRoot(node, newNode);
-         },
-         _splitRoot: function _splitRoot(node, newNode) {
-           // split root node
-           this.data = createNode$1([node, newNode]);
-           this.data.height = node.height + 1;
-           this.data.leaf = false;
-           calcBBox$1(this.data, this.toBBox);
-         },
-         _chooseSplitIndex: function _chooseSplitIndex(node, m, M) {
-           var i, bbox1, bbox2, overlap, area, minOverlap, minArea, index;
-           minOverlap = minArea = Infinity;
+           targets.exit().remove(); // enter/update
 
-           for (i = m; i <= M - m; i++) {
-             bbox1 = distBBox$1(node, 0, i, this.toBBox);
-             bbox2 = distBBox$1(node, i, M, this.toBBox);
-             overlap = intersectionArea$1(bbox1, bbox2);
-             area = bboxArea$1(bbox1) + bboxArea$1(bbox2); // choose distribution with minimum overlap
+           targets.enter().append('rect').attr('x', -10).attr('y', -26).attr('width', 20).attr('height', 30).merge(targets).attr('class', function (d) {
+             return 'node point target ' + fillClass + d.id;
+           }).attr('transform', getTransform);
+         }
 
-             if (overlap < minOverlap) {
-               minOverlap = overlap;
-               index = i;
-               minArea = area < minArea ? area : minArea;
-             } else if (overlap === minOverlap) {
-               // otherwise choose distribution with minimum area
-               if (area < minArea) {
-                 minArea = area;
-                 index = i;
-               }
-             }
-           }
+         function drawPoints(selection, graph, entities, filter) {
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           var base = context.history().base(); // Points with a direction will render as vertices at higher zooms..
 
-           return index;
-         },
-         // sorts node children by the best axis for split
-         _chooseSplitAxis: function _chooseSplitAxis(node, m, M) {
-           var compareMinX = node.leaf ? this.compareMinX : compareNodeMinX$1,
-               compareMinY = node.leaf ? this.compareMinY : compareNodeMinY$1,
-               xMargin = this._allDistMargin(node, m, M, compareMinX),
-               yMargin = this._allDistMargin(node, m, M, compareMinY); // if total distributions margin value is minimal for x, sort by minX,
-           // otherwise it's already sorted by minY
+           function renderAsPoint(entity) {
+             return entity.geometry(graph) === 'point' && !(zoom >= 18 && entity.directions(graph, projection).length);
+           } // All points will render as vertices in wireframe mode too..
 
 
-           if (xMargin < yMargin) node.children.sort(compareMinX);
-         },
-         // total margin of all possible split distributions where each node is at least m full
-         _allDistMargin: function _allDistMargin(node, m, M, compare) {
-           node.children.sort(compare);
-           var toBBox = this.toBBox,
-               leftBBox = distBBox$1(node, 0, m, toBBox),
-               rightBBox = distBBox$1(node, M - m, M, toBBox),
-               margin = bboxMargin$1(leftBBox) + bboxMargin$1(rightBBox),
-               i,
-               child;
+           var points = wireframe ? [] : entities.filter(renderAsPoint);
+           points.sort(sortY);
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
+           var touchLayer = selection.selectAll('.layer-touch.points'); // Draw points..
 
-           for (i = m; i < M - m; i++) {
-             child = node.children[i];
-             extend$3(leftBBox, node.leaf ? toBBox(child) : child);
-             margin += bboxMargin$1(leftBBox);
-           }
+           var groups = drawLayer.selectAll('g.point').filter(filter).data(points, fastEntityKey);
+           groups.exit().remove();
+           var enter = groups.enter().append('g').attr('class', function (d) {
+             return 'node point ' + d.id;
+           }).order();
+           enter.append('path').call(markerPath, 'shadow');
+           enter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
+           enter.append('path').call(markerPath, 'stroke');
+           enter.append('use').attr('transform', 'translate(-5, -19)').attr('class', 'icon').attr('width', '11px').attr('height', '11px');
+           groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('added', function (d) {
+             return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+           }).classed('moved', function (d) {
+             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+           }).classed('retagged', function (d) {
+             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+           }).call(svgTagClasses());
+           groups.select('.shadow'); // propagate bound data
 
-           for (i = M - m - 1; i >= m; i--) {
-             child = node.children[i];
-             extend$3(rightBBox, node.leaf ? toBBox(child) : child);
-             margin += bboxMargin$1(rightBBox);
-           }
+           groups.select('.stroke'); // propagate bound data
 
-           return margin;
-         },
-         _adjustParentBBoxes: function _adjustParentBBoxes(bbox, path, level) {
-           // adjust bboxes along the given tree path
-           for (var i = level; i >= 0; i--) {
-             extend$3(path[i], bbox);
-           }
-         },
-         _condense: function _condense(path) {
-           // go through the path, removing empty nodes and updating bboxes
-           for (var i = path.length - 1, siblings; i >= 0; i--) {
-             if (path[i].children.length === 0) {
-               if (i > 0) {
-                 siblings = path[i - 1].children;
-                 siblings.splice(siblings.indexOf(path[i]), 1);
-               } else this.clear();
-             } else calcBBox$1(path[i], this.toBBox);
-           }
-         },
-         _initFormat: function _initFormat(format) {
-           // data format (minX, minY, maxX, maxY accessors)
-           // uses eval-type function compilation instead of just accepting a toBBox function
-           // because the algorithms are very sensitive to sorting functions performance,
-           // so they should be dead simple and without inner calls
-           var compareArr = ['return a', ' - b', ';'];
-           this.compareMinX = new Function('a', 'b', compareArr.join(format[0]));
-           this.compareMinY = new Function('a', 'b', compareArr.join(format[1]));
-           this.toBBox = new Function('a', 'return {minX: a' + format[0] + ', minY: a' + format[1] + ', maxX: a' + format[2] + ', maxY: a' + format[3] + '};');
-         }
-       };
+           groups.select('.icon') // propagate bound data
+           .attr('xlink:href', function (entity) {
+             var preset = _mainPresetIndex.match(entity, graph);
+             var picon = preset && preset.icon;
 
-       function findItem$1(item, items, equalsFn) {
-         if (!equalsFn) return items.indexOf(item);
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return '#' + picon + (isMaki ? '-11' : '');
+             }
+           }); // Draw touch targets..
 
-         for (var i = 0; i < items.length; i++) {
-           if (equalsFn(item, items[i])) return i;
+           touchLayer.call(drawTargets, graph, points, filter);
          }
 
-         return -1;
-       } // calculate node's bbox from bboxes of its children
-
-
-       function calcBBox$1(node, toBBox) {
-         distBBox$1(node, 0, node.children.length, toBBox, node);
-       } // min bounding rectangle of node children from k to p-1
-
-
-       function distBBox$1(node, k, p, toBBox, destNode) {
-         if (!destNode) destNode = createNode$1(null);
-         destNode.minX = Infinity;
-         destNode.minY = Infinity;
-         destNode.maxX = -Infinity;
-         destNode.maxY = -Infinity;
+         return drawPoints;
+       }
 
-         for (var i = k, child; i < p; i++) {
-           child = node.children[i];
-           extend$3(destNode, node.leaf ? toBBox(child) : child);
+       function svgTurns(projection, context) {
+         function icon(turn) {
+           var u = turn.u ? '-u' : '';
+           if (turn.no) return '#iD-turn-no' + u;
+           if (turn.only) return '#iD-turn-only' + u;
+           return '#iD-turn-yes' + u;
          }
 
-         return destNode;
-       }
-
-       function extend$3(a, b) {
-         a.minX = Math.min(a.minX, b.minX);
-         a.minY = Math.min(a.minY, b.minY);
-         a.maxX = Math.max(a.maxX, b.maxX);
-         a.maxY = Math.max(a.maxY, b.maxY);
-         return a;
-       }
+         function drawTurns(selection, graph, turns) {
+           function turnTransform(d) {
+             var pxRadius = 50;
+             var toWay = graph.entity(d.to.way);
+             var toPoints = graph.childNodes(toWay).map(function (n) {
+               return n.loc;
+             }).map(projection);
+             var toLength = geoPathLength(toPoints);
+             var mid = toLength / 2; // midpoint of destination way
 
-       function compareNodeMinX$1(a, b) {
-         return a.minX - b.minX;
-       }
+             var toNode = graph.entity(d.to.node);
+             var toVertex = graph.entity(d.to.vertex);
+             var a = geoAngle(toVertex, toNode, projection);
+             var o = projection(toVertex.loc);
+             var r = d.u ? 0 // u-turn: no radius
+             : !toWay.__via ? pxRadius // leaf way: put marker at pxRadius
+             : Math.min(mid, pxRadius); // via way: prefer pxRadius, fallback to mid for very short ways
 
-       function compareNodeMinY$1(a, b) {
-         return a.minY - b.minY;
-       }
+             return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
+           }
 
-       function bboxArea$1(a) {
-         return (a.maxX - a.minX) * (a.maxY - a.minY);
-       }
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
+           var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
 
-       function bboxMargin$1(a) {
-         return a.maxX - a.minX + (a.maxY - a.minY);
-       }
+           var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
+             return d.key;
+           }); // exit
 
-       function enlargedArea$1(a, b) {
-         return (Math.max(b.maxX, a.maxX) - Math.min(b.minX, a.minX)) * (Math.max(b.maxY, a.maxY) - Math.min(b.minY, a.minY));
-       }
+           groups.exit().remove(); // enter
 
-       function intersectionArea$1(a, b) {
-         var minX = Math.max(a.minX, b.minX),
-             minY = Math.max(a.minY, b.minY),
-             maxX = Math.min(a.maxX, b.maxX),
-             maxY = Math.min(a.maxY, b.maxY);
-         return Math.max(0, maxX - minX) * Math.max(0, maxY - minY);
-       }
+           var groupsEnter = groups.enter().append('g').attr('class', function (d) {
+             return 'turn ' + d.key;
+           });
+           var turnsEnter = groupsEnter.filter(function (d) {
+             return !d.u;
+           });
+           turnsEnter.append('rect').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+           turnsEnter.append('use').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+           var uEnter = groupsEnter.filter(function (d) {
+             return d.u;
+           });
+           uEnter.append('circle').attr('r', '16');
+           uEnter.append('use').attr('transform', 'translate(-16, -16)').attr('width', '32').attr('height', '32'); // update
 
-       function contains$1(a, b) {
-         return a.minX <= b.minX && a.minY <= b.minY && b.maxX <= a.maxX && b.maxY <= a.maxY;
-       }
+           groups = groups.merge(groupsEnter).attr('opacity', function (d) {
+             return d.direct === false ? '0.7' : null;
+           }).attr('transform', turnTransform);
+           groups.select('use').attr('xlink:href', icon);
+           groups.select('rect'); // propagate bound data
 
-       function intersects$1(a, b) {
-         return b.minX <= a.maxX && b.minY <= a.maxY && b.maxX >= a.minX && b.maxY >= a.minY;
-       }
+           groups.select('circle'); // propagate bound data
+           // Draw touch targets..
 
-       function createNode$1(children) {
-         return {
-           children: children,
-           height: 1,
-           leaf: true,
-           minX: Infinity,
-           minY: Infinity,
-           maxX: -Infinity,
-           maxY: -Infinity
-         };
-       } // sort an array so that items come in groups of n unsorted items, with groups sorted between each other;
-       // combines selection algorithm with binary divide & conquer approach
+           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
+             return d.key;
+           }); // exit
 
+           groups.exit().remove(); // enter
 
-       function multiSelect$1(arr, left, right, n, compare) {
-         var stack = [left, right],
-             mid;
+           groupsEnter = groups.enter().append('g').attr('class', function (d) {
+             return 'turn ' + d.key;
+           });
+           turnsEnter = groupsEnter.filter(function (d) {
+             return !d.u;
+           });
+           turnsEnter.append('rect').attr('class', 'target ' + fillClass).attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
+           uEnter = groupsEnter.filter(function (d) {
+             return d.u;
+           });
+           uEnter.append('circle').attr('class', 'target ' + fillClass).attr('r', '16'); // update
 
-         while (stack.length) {
-           right = stack.pop();
-           left = stack.pop();
-           if (right - left <= n) continue;
-           mid = left + Math.ceil((right - left) / n / 2) * n;
-           quickselect$2(arr, mid, left, right, compare);
-           stack.push(left, mid, mid, right);
-         }
-       }
-       rbush_1["default"] = _default$2;
+           groups = groups.merge(groupsEnter).attr('transform', turnTransform);
+           groups.select('rect'); // propagate bound data
 
-       var lineclip_1$1 = lineclip$1;
-       lineclip$1.polyline = lineclip$1;
-       lineclip$1.polygon = polygonclip$1; // Cohen-Sutherland line clippign algorithm, adapted to efficiently
-       // handle polylines rather than just segments
+           groups.select('circle'); // propagate bound data
 
-       function lineclip$1(points, bbox, result) {
-         var len = points.length,
-             codeA = bitCode$1(points[0], bbox),
-             part = [],
-             i,
-             a,
-             b,
-             codeB,
-             lastCode;
-         if (!result) result = [];
+           return this;
+         }
 
-         for (i = 1; i < len; i++) {
-           a = points[i - 1];
-           b = points[i];
-           codeB = lastCode = bitCode$1(b, bbox);
+         return drawTurns;
+       }
 
-           while (true) {
-             if (!(codeA | codeB)) {
-               // accept
-               part.push(a);
+       function svgVertices(projection, context) {
+         var radiuses = {
+           //       z16-, z17,   z18+,  w/icon
+           shadow: [6, 7.5, 7.5, 12],
+           stroke: [2.5, 3.5, 3.5, 8],
+           fill: [1, 1.5, 1.5, 1.5]
+         };
 
-               if (codeB !== lastCode) {
-                 // segment went outside
-                 part.push(b);
+         var _currHoverTarget;
 
-                 if (i < len - 1) {
-                   // start a new line
-                   result.push(part);
-                   part = [];
-                 }
-               } else if (i === len - 1) {
-                 part.push(b);
-               }
+         var _currPersistent = {};
+         var _currHover = {};
+         var _prevHover = {};
+         var _currSelected = {};
+         var _prevSelected = {};
+         var _radii = {};
 
-               break;
-             } else if (codeA & codeB) {
-               // trivial reject
-               break;
-             } else if (codeA) {
-               // a outside, intersect with clip edge
-               a = intersect$1(a, b, codeA, bbox);
-               codeA = bitCode$1(a, bbox);
-             } else {
-               // b outside
-               b = intersect$1(a, b, codeB, bbox);
-               codeB = bitCode$1(b, bbox);
-             }
-           }
+         function sortY(a, b) {
+           return b.loc[1] - a.loc[1];
+         } // Avoid exit/enter if we're just moving stuff around.
+         // The node will get a new version but we only need to run the update selection.
 
-           codeA = lastCode;
+
+         function fastEntityKey(d) {
+           var mode = context.mode();
+           var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+           return isMoving ? d.id : osmEntity.key(d);
          }
 
-         if (part.length) result.push(part);
-         return result;
-       } // Sutherland-Hodgeman polygon clipping algorithm
+         function draw(selection, graph, vertices, sets, filter) {
+           sets = sets || {
+             selected: {},
+             important: {},
+             hovered: {}
+           };
+           var icons = {};
+           var directions = {};
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           var z = zoom < 17 ? 0 : zoom < 18 ? 1 : 2;
+           var activeID = context.activeID();
+           var base = context.history().base();
 
+           function getIcon(d) {
+             // always check latest entity, as fastEntityKey avoids enter/exit now
+             var entity = graph.entity(d.id);
+             if (entity.id in icons) return icons[entity.id];
+             icons[entity.id] = entity.hasInterestingTags() && _mainPresetIndex.match(entity, graph).icon;
+             return icons[entity.id];
+           } // memoize directions results, return false for empty arrays (for use in filter)
 
-       function polygonclip$1(points, bbox) {
-         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-         for (edge = 1; edge <= 8; edge *= 2) {
-           result = [];
-           prev = points[points.length - 1];
-           prevInside = !(bitCode$1(prev, bbox) & edge);
+           function getDirections(entity) {
+             if (entity.id in directions) return directions[entity.id];
+             var angles = entity.directions(graph, projection);
+             directions[entity.id] = angles.length ? angles : false;
+             return angles;
+           }
 
-           for (i = 0; i < points.length; i++) {
-             p = points[i];
-             inside = !(bitCode$1(p, bbox) & edge); // if segment goes through the clip window, add an intersection
+           function updateAttributes(selection) {
+             ['shadow', 'stroke', 'fill'].forEach(function (klass) {
+               var rads = radiuses[klass];
+               selection.selectAll('.' + klass).each(function (entity) {
+                 var i = z && getIcon(entity);
+                 var r = rads[i ? 3 : z]; // slightly increase the size of unconnected endpoints #3775
 
-             if (inside !== prevInside) result.push(intersect$1(prev, p, edge, bbox));
-             if (inside) result.push(p); // add a point if it's inside
+                 if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
+                   r += 1.5;
+                 }
 
-             prev = p;
-             prevInside = inside;
+                 if (klass === 'shadow') {
+                   // remember this value, so we don't need to
+                   _radii[entity.id] = r; // recompute it when we draw the touch targets
+                 }
+
+                 select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
+               });
+             });
            }
 
-           points = result;
-           if (!points.length) break;
-         }
+           vertices.sort(sortY);
+           var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
 
-         return result;
-       } // intersect a segment against one of the 4 lines that make up the bbox
+           groups.exit().remove(); // enter
 
+           var enter = groups.enter().append('g').attr('class', function (d) {
+             return 'node vertex ' + d.id;
+           }).order();
+           enter.append('circle').attr('class', 'shadow');
+           enter.append('circle').attr('class', 'stroke'); // Vertices with tags get a fill.
 
-       function intersect$1(a, b, edge, bbox) {
-         return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] : // top
-         edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] : // bottom
-         edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] : // right
-         edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] : // left
-         null;
-       } // bit code reflects the point position relative to the bbox:
-       //         left  mid  right
-       //    top  1001  1000  1010
-       //    mid  0001  0000  0010
-       // bottom  0101  0100  0110
+           enter.filter(function (d) {
+             return d.hasInterestingTags();
+           }).append('circle').attr('class', 'fill'); // update
+
+           groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('sibling', function (d) {
+             return d.id in sets.selected;
+           }).classed('shared', function (d) {
+             return graph.isShared(d);
+           }).classed('endpoint', function (d) {
+             return d.isEndpoint(graph);
+           }).classed('added', function (d) {
+             return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
+           }).classed('moved', function (d) {
+             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
+           }).classed('retagged', function (d) {
+             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
+           }).call(updateAttributes); // Vertices with icons get a `use`.
 
+           var iconUse = groups.selectAll('.icon').data(function data(d) {
+             return zoom >= 17 && getIcon(d) ? [d] : [];
+           }, fastEntityKey); // exit
 
-       function bitCode$1(p, bbox) {
-         var code = 0;
-         if (p[0] < bbox[0]) code |= 1; // left
-         else if (p[0] > bbox[2]) code |= 2; // right
+           iconUse.exit().remove(); // enter
 
-         if (p[1] < bbox[1]) code |= 4; // bottom
-         else if (p[1] > bbox[3]) code |= 8; // top
+           iconUse.enter().append('use').attr('class', 'icon').attr('width', '11px').attr('height', '11px').attr('transform', 'translate(-5.5, -5.5)').attr('xlink:href', function (d) {
+             var picon = getIcon(d);
+             var isMaki = /^maki-/.test(picon);
+             return '#' + picon + (isMaki ? '-11' : '');
+           }); // Vertices with directions get viewfields
 
-         return code;
-       }
+           var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
+             return zoom >= 18 && getDirections(d) ? [d] : [];
+           }, fastEntityKey); // exit
 
-       var whichPolygon_1 = whichPolygon;
+           dgroups.exit().remove(); // enter/update
 
-       function whichPolygon(data) {
-         var bboxes = [];
+           dgroups = dgroups.enter().insert('g', '.shadow').attr('class', 'viewfieldgroup').merge(dgroups);
+           var viewfields = dgroups.selectAll('.viewfield').data(getDirections, function key(d) {
+             return osmEntity.key(d);
+           }); // exit
 
-         for (var i = 0; i < data.features.length; i++) {
-           var feature = data.features[i];
-           var coords = feature.geometry.coordinates;
+           viewfields.exit().remove(); // enter/update
 
-           if (feature.geometry.type === 'Polygon') {
-             bboxes.push(treeItem(coords, feature.properties));
-           } else if (feature.geometry.type === 'MultiPolygon') {
-             for (var j = 0; j < coords.length; j++) {
-               bboxes.push(treeItem(coords[j], feature.properties));
-             }
-           }
+           viewfields.enter().append('path').attr('class', 'viewfield').attr('d', 'M0,0H0').merge(viewfields).attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')').attr('transform', function (d) {
+             return 'rotate(' + d + ')';
+           });
          }
 
-         var tree = rbush_1().load(bboxes);
+         function drawTargets(selection, graph, entities, filter) {
+           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
+           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
+           var getTransform = svgPointTransform(projection).geojson;
+           var activeID = context.activeID();
+           var data = {
+             targets: [],
+             nopes: []
+           };
+           entities.forEach(function (node) {
+             if (activeID === node.id) return; // draw no target on the activeID
 
-         function query(p, multi) {
-           var output = [],
-               result = tree.search({
-             minX: p[0],
-             minY: p[1],
-             maxX: p[0],
-             maxY: p[1]
-           });
+             var vertexType = svgPassiveVertex(node, graph, activeID);
 
-           for (var i = 0; i < result.length; i++) {
-             if (insidePolygon(result[i].coords, p)) {
-               if (multi) output.push(result[i].props);else return result[i].props;
+             if (vertexType !== 0) {
+               // passive or adjacent - allow to connect
+               data.targets.push({
+                 type: 'Feature',
+                 id: node.id,
+                 properties: {
+                   target: true,
+                   entity: node
+                 },
+                 geometry: node.asGeoJSON()
+               });
+             } else {
+               data.nopes.push({
+                 type: 'Feature',
+                 id: node.id + '-nope',
+                 properties: {
+                   nope: true,
+                   target: true,
+                   entity: node
+                 },
+                 geometry: node.asGeoJSON()
+               });
              }
-           }
+           }); // Targets allow hover and vertex snapping
 
-           return multi && output.length ? output : null;
-         }
+           var targets = selection.selectAll('.vertex.target-allowed').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(data.targets, function key(d) {
+             return d.id;
+           }); // exit
 
-         query.tree = tree;
+           targets.exit().remove(); // enter/update
 
-         query.bbox = function queryBBox(bbox) {
-           var output = [];
-           var result = tree.search({
-             minX: bbox[0],
-             minY: bbox[1],
-             maxX: bbox[2],
-             maxY: bbox[3]
-           });
+           targets.enter().append('circle').attr('r', function (d) {
+             return _radii[d.id] || radiuses.shadow[3];
+           }).merge(targets).attr('class', function (d) {
+             return 'node vertex target target-allowed ' + targetClass + d.id;
+           }).attr('transform', getTransform); // NOPE
 
-           for (var i = 0; i < result.length; i++) {
-             if (polygonIntersectsBBox(result[i].coords, bbox)) {
-               output.push(result[i].props);
-             }
-           }
+           var nopes = selection.selectAll('.vertex.target-nope').filter(function (d) {
+             return filter(d.properties.entity);
+           }).data(data.nopes, function key(d) {
+             return d.id;
+           }); // exit
 
-           return output;
-         };
+           nopes.exit().remove(); // enter/update
 
-         return query;
-       }
+           nopes.enter().append('circle').attr('r', function (d) {
+             return _radii[d.properties.entity.id] || radiuses.shadow[3];
+           }).merge(nopes).attr('class', function (d) {
+             return 'node vertex target target-nope ' + nopeClass + d.id;
+           }).attr('transform', getTransform);
+         } // Points can also render as vertices:
+         // 1. in wireframe mode or
+         // 2. at higher zooms if they have a direction
 
-       function polygonIntersectsBBox(polygon, bbox) {
-         var bboxCenter = [(bbox[0] + bbox[2]) / 2, (bbox[1] + bbox[3]) / 2];
-         if (insidePolygon(polygon, bboxCenter)) return true;
 
-         for (var i = 0; i < polygon.length; i++) {
-           if (lineclip_1$1(polygon[i], bbox).length > 0) return true;
+         function renderAsVertex(entity, graph, wireframe, zoom) {
+           var geometry = entity.geometry(graph);
+           return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
          }
 
-         return false;
-       } // ray casting algorithm for detecting if point is in polygon
+         function isEditedNode(node, base, head) {
+           var baseNode = base.entities[node.id];
+           var headNode = head.entities[node.id];
+           return !headNode || !baseNode || !fastDeepEqual(headNode.tags, baseNode.tags) || !fastDeepEqual(headNode.loc, baseNode.loc);
+         }
 
+         function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
+           var results = {};
+           var seenIds = {};
 
-       function insidePolygon(rings, p) {
-         var inside = false;
+           function addChildVertices(entity) {
+             // avoid redundant work and infinite recursion of circular relations
+             if (seenIds[entity.id]) return;
+             seenIds[entity.id] = true;
+             var geometry = entity.geometry(graph);
 
-         for (var i = 0, len = rings.length; i < len; i++) {
-           var ring = rings[i];
+             if (!context.features().isHiddenFeature(entity, graph, geometry)) {
+               var i;
 
-           for (var j = 0, len2 = ring.length, k = len2 - 1; j < len2; k = j++) {
-             if (rayIntersect(p, ring[j], ring[k])) inside = !inside;
-           }
-         }
+               if (entity.type === 'way') {
+                 for (i = 0; i < entity.nodes.length; i++) {
+                   var child = graph.hasEntity(entity.nodes[i]);
 
-         return inside;
-       }
+                   if (child) {
+                     addChildVertices(child);
+                   }
+                 }
+               } else if (entity.type === 'relation') {
+                 for (i = 0; i < entity.members.length; i++) {
+                   var member = graph.hasEntity(entity.members[i].id);
 
-       function rayIntersect(p, p1, p2) {
-         return p1[1] > p[1] !== p2[1] > p[1] && p[0] < (p2[0] - p1[0]) * (p[1] - p1[1]) / (p2[1] - p1[1]) + p1[0];
-       }
+                   if (member) {
+                     addChildVertices(member);
+                   }
+                 }
+               } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                 results[entity.id] = entity;
+               }
+             }
+           }
 
-       function treeItem(coords, props) {
-         var item = {
-           minX: Infinity,
-           minY: Infinity,
-           maxX: -Infinity,
-           maxY: -Infinity,
-           coords: coords,
-           props: props
-         };
+           ids.forEach(function (id) {
+             var entity = graph.hasEntity(id);
+             if (!entity) return;
 
-         for (var i = 0; i < coords[0].length; i++) {
-           var p = coords[0][i];
-           item.minX = Math.min(item.minX, p[0]);
-           item.minY = Math.min(item.minY, p[1]);
-           item.maxX = Math.max(item.maxX, p[0]);
-           item.maxY = Math.max(item.maxY, p[1]);
+             if (entity.type === 'node') {
+               if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                 results[entity.id] = entity;
+                 graph.parentWays(entity).forEach(function (entity) {
+                   addChildVertices(entity);
+                 });
+               }
+             } else {
+               // way, relation
+               addChildVertices(entity);
+             }
+           });
+           return results;
          }
 
-         return item;
-       }
+         function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
+           var wireframe = context.surface().classed('fill-wireframe');
+           var visualDiff = context.surface().classed('highlight-edited');
+           var zoom = geoScaleToZoom(projection.scale());
+           var mode = context.mode();
+           var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
+           var base = context.history().base();
+           var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
+           var touchLayer = selection.selectAll('.layer-touch.points');
 
-       var type = "FeatureCollection";
-       var features = [{type:"Feature",properties:{m49:"680",wikidata:"Q3405693",nameEn:"Sark",country:"GB",groups:["GG","830","154","150"],level:"subterritory",driveSide:"left",roadSpeedUnit:"mph",callingCodes:["44 01481"]},geometry:{type:"MultiPolygon",coordinates:[[[[-2.36485,49.48223],[-2.65349,49.15373],[-2.09454,49.46288],[-2.36485,49.48223]]]]}},{type:"Feature",properties:{m49:"001",wikidata:"Q2",nameEn:"World",aliases:["Earth","Planet"],level:"world"},geometry:null},{type:"Feature",properties:{m49:"142",wikidata:"Q48",nameEn:"Asia",level:"region"},geometry:null},{type:"Feature",properties:{m49:"143",wikidata:"Q27275",nameEn:"Central Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"145",wikidata:"Q27293",nameEn:"Western Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"150",wikidata:"Q46",nameEn:"Europe",level:"region"},geometry:null},{type:"Feature",properties:{m49:"151",wikidata:"Q27468",nameEn:"Eastern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"154",wikidata:"Q27479",nameEn:"Northern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"155",wikidata:"Q27496",nameEn:"Western Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"202",wikidata:"Q132959",nameEn:"Sub-Saharan Africa",groups:["002"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"419",wikidata:"Q72829598",nameEn:"Latin America and the Caribbean",groups:["019"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"830",wikidata:"Q42314",nameEn:"Channel Islands",groups:["150","154"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"019",wikidata:"Q828",nameEn:"Americas",level:"region"},geometry:null},{type:"Feature",properties:{m49:"029",wikidata:"Q664609",nameEn:"Caribbean",groups:["419","019","003"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"034",wikidata:"Q771405",nameEn:"Southern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"002",wikidata:"Q15",nameEn:"Africa",level:"region"},geometry:null},{type:"Feature",properties:{m49:"003",wikidata:"Q49",nameEn:"North America",groups:["019"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"017",wikidata:"Q27433",nameEn:"Middle Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"039",wikidata:"Q27449",nameEn:"Southern Europe",groups:["150"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"005",wikidata:"Q18",nameEn:"South America",groups:["419","019"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"009",wikidata:"Q538",nameEn:"Oceania",level:"region"},geometry:null},{type:"Feature",properties:{m49:"061",wikidata:"Q35942",nameEn:"Polynesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"014",wikidata:"Q27407",nameEn:"Eastern Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"053",wikidata:"Q45256",nameEn:"Australia and New Zealand",aliases:["Australasia"],groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"011",wikidata:"Q4412",nameEn:"Western Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"013",wikidata:"Q27611",nameEn:"Central America",groups:["419","019","003"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"021",wikidata:"Q2017699",nameEn:"Northern America",groups:["019","003"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"035",wikidata:"Q11708",nameEn:"South-eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"018",wikidata:"Q27394",nameEn:"Southern Africa",groups:["202","002"],level:"intermediateRegion"},geometry:null},{type:"Feature",properties:{m49:"030",wikidata:"Q27231",nameEn:"Eastern Asia",groups:["142"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"015",wikidata:"Q27381",nameEn:"Northern Africa",groups:["002"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"054",wikidata:"Q37394",nameEn:"Melanesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{m49:"057",wikidata:"Q3359409",nameEn:"Micronesia",groups:["009"],level:"subregion"},geometry:null},{type:"Feature",properties:{iso1A2:"AC",iso1A3:"ASC",wikidata:"Q46197",nameEn:"Ascension Island",country:"GB",groups:["SH","011","202","002"],isoStatus:"excRes",driveSide:"left",roadSpeedUnit:"mph",callingCodes:["247"]},geometry:{type:"MultiPolygon",coordinates:[[[[-14.82771,-8.70814],[-13.33271,-8.07391],[-14.91926,-6.63386],[-14.82771,-8.70814]]]]}},{type:"Feature",properties:{iso1A2:"AD",iso1A3:"AND",iso1N3:"020",wikidata:"Q228",nameEn:"Andorra",groups:["039","150"],callingCo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-       var rawBorders = {
-       type: type,
-       features: features
-       };
+           if (fullRedraw) {
+             _currPersistent = {};
+             _radii = {};
+           } // Collect important vertices from the `entities` list..
+           // (during a partial redraw, it will not contain everything)
 
-       var borders = rawBorders;
-       var whichPolygonGetter = {};
-       var featuresByCode = {};
-       var idFilterRegex = /\bThe\b|\bthe\b|\band\b|\bof\b|[-_ .,()&[\]/]/g;
-       var levels = ['subterritory', 'territory', 'country', 'intermediateRegion', 'subregion', 'region', 'union', 'world'];
-       loadDerivedDataAndCaches(borders);
 
-       function loadDerivedDataAndCaches(borders) {
-         var identifierProps = ['iso1A2', 'iso1A3', 'm49', 'wikidata', 'emojiFlag', 'nameEn'];
-         var geometryFeatures = [];
+           for (var i = 0; i < entities.length; i++) {
+             var entity = entities[i];
+             var geometry = entity.geometry(graph);
+             var keep = false; // a point that looks like a vertex..
 
-         for (var i in borders.features) {
-           var _feature = borders.features[i];
-           _feature.properties.id = _feature.properties.iso1A2 || _feature.properties.m49;
-           loadM49(_feature);
-           loadIsoStatus(_feature);
-           loadLevel(_feature);
-           loadGroups(_feature);
-           loadRoadSpeedUnit(_feature);
-           loadDriveSide(_feature);
-           loadFlag(_feature);
-           cacheFeatureByIDs(_feature);
-           if (_feature.geometry) geometryFeatures.push(_feature);
-         }
+             if (geometry === 'point' && renderAsVertex(entity, graph, wireframe, zoom)) {
+               _currPersistent[entity.id] = entity;
+               keep = true; // a vertex of some importance..
+             } else if (geometry === 'vertex' && (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || visualDiff && isEditedNode(entity, base, graph))) {
+               _currPersistent[entity.id] = entity;
+               keep = true;
+             } // whatever this is, it's not a persistent vertex..
 
-         for (var _i in borders.features) {
-           var _feature2 = borders.features[_i];
 
-           _feature2.properties.groups.sort(function (groupID1, groupID2) {
-             return levels.indexOf(featuresByCode[groupID1].properties.level) - levels.indexOf(featuresByCode[groupID2].properties.level);
-           });
+             if (!keep && !fullRedraw) {
+               delete _currPersistent[entity.id];
+             }
+           } // 3 sets of vertices to consider:
 
-           loadMembersForGroupsOf(_feature2);
-         }
 
-         var geometryOnlyCollection = {
-           type: 'RegionFeatureCollection',
-           features: geometryFeatures
-         };
-         whichPolygonGetter = whichPolygon_1(geometryOnlyCollection);
+           var sets = {
+             persistent: _currPersistent,
+             // persistent = important vertices (render always)
+             selected: _currSelected,
+             // selected + siblings of selected (render always)
+             hovered: _currHover // hovered + siblings of hovered (render only in draw modes)
 
-         function loadGroups(feature) {
-           var props = feature.properties;
+           };
+           var all = Object.assign({}, isMoving ? _currHover : {}, _currSelected, _currPersistent); // Draw the vertices..
+           // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
+           // Adjust the filter function to expand the scope beyond whatever entities were passed in.
 
-           if (!props.groups) {
-             props.groups = [];
-           }
+           var filterRendered = function filterRendered(d) {
+             return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
+           };
 
-           if (props.country) {
-             props.groups.push(props.country);
-           }
+           drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
+           // When drawing, render all targets (not just those affected by a partial redraw)
 
-           if (props.m49 !== '001') {
-             props.groups.push('001');
-           }
-         }
+           var filterTouch = function filterTouch(d) {
+             return isMoving ? true : filterRendered(d);
+           };
 
-         function loadM49(feature) {
-           var props = feature.properties;
+           touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
 
-           if (!props.m49 && props.iso1N3) {
-             props.m49 = props.iso1N3;
+           function currentVisible(which) {
+             return Object.keys(which).map(graph.hasEntity, graph) // the current version of this entity
+             .filter(function (entity) {
+               return entity && entity.intersects(extent, graph);
+             });
            }
-         }
+         } // partial redraw - only update the selected items..
 
-         function loadIsoStatus(feature) {
-           var props = feature.properties;
 
-           if (!props.isoStatus && props.iso1A2) {
-             props.isoStatus = 'official';
-           }
-         }
+         drawVertices.drawSelected = function (selection, graph, extent) {
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           _prevSelected = _currSelected || {};
 
-         function loadLevel(feature) {
-           var props = feature.properties;
-           if (props.level) return;
+           if (context.map().isInWideSelection()) {
+             _currSelected = {};
+             context.selectedIDs().forEach(function (id) {
+               var entity = graph.hasEntity(id);
+               if (!entity) return;
 
-           if (!props.country) {
-             props.level = 'country';
-           } else if (props.isoStatus === 'official') {
-             props.level = 'territory';
+               if (entity.type === 'node') {
+                 if (renderAsVertex(entity, graph, wireframe, zoom)) {
+                   _currSelected[entity.id] = entity;
+                 }
+               }
+             });
            } else {
-             props.level = 'subterritory';
-           }
-         }
+             _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
+           } // note that drawVertices will add `_currSelected` automatically if needed..
 
-         function loadRoadSpeedUnit(feature) {
-           var props = feature.properties;
 
-           if (props.roadSpeedUnit === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-             props.roadSpeedUnit = 'km/h';
-           }
-         }
+           var filter = function filter(d) {
+             return d.id in _prevSelected;
+           };
 
-         function loadDriveSide(feature) {
-           var props = feature.properties;
+           drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
+         }; // partial redraw - only update the hovered items..
 
-           if (props.driveSide === undefined && props.iso1A2 && props.iso1A2 !== 'EU') {
-             props.driveSide = 'right';
-           }
-         }
 
-         function loadFlag(feature) {
-           if (!feature.properties.iso1A2) return;
-           var flag = feature.properties.iso1A2.replace(/./g, function (_char) {
-             return String.fromCodePoint(_char.charCodeAt(0) + 127397);
-           });
-           feature.properties.emojiFlag = flag;
-         }
+         drawVertices.drawHover = function (selection, graph, target, extent) {
+           if (target === _currHoverTarget) return; // continue only if something changed
 
-         function loadMembersForGroupsOf(feature) {
-           var featureID = feature.properties.id;
-           var standardizedGroupIDs = [];
+           var wireframe = context.surface().classed('fill-wireframe');
+           var zoom = geoScaleToZoom(projection.scale());
+           _prevHover = _currHover || {};
+           _currHoverTarget = target;
+           var entity = target && target.properties && target.properties.entity;
 
-           for (var j in feature.properties.groups) {
-             var groupID = feature.properties.groups[j];
-             var groupFeature = featuresByCode[groupID];
-             standardizedGroupIDs.push(groupFeature.properties.id);
+           if (entity) {
+             _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
+           } else {
+             _currHover = {};
+           } // note that drawVertices will add `_currHover` automatically if needed..
 
-             if (groupFeature.properties.members) {
-               groupFeature.properties.members.push(featureID);
-             } else {
-               groupFeature.properties.members = [featureID];
-             }
-           }
 
-           feature.properties.groups = standardizedGroupIDs;
+           var filter = function filter(d) {
+             return d.id in _prevHover;
+           };
+
+           drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
+         };
+
+         return drawVertices;
+       }
+
+       function utilBindOnce(target, type, listener, capture) {
+         var typeOnce = type + '.once';
+
+         function one() {
+           target.on(typeOnce, null);
+           listener.apply(this, arguments);
          }
 
-         function cacheFeatureByIDs(feature) {
-           for (var k in identifierProps) {
-             var prop = identifierProps[k];
-             var id = prop && feature.properties[prop];
+         target.on(typeOnce, one, capture);
+         return this;
+       }
 
-             if (id) {
-               id = id.replace(idFilterRegex, '').toUpperCase();
-               featuresByCode[id] = feature;
-             }
-           }
+       function defaultFilter(d3_event) {
+         return !d3_event.ctrlKey && !d3_event.button;
+       }
+
+       function defaultExtent() {
+         var e = this;
+
+         if (e instanceof SVGElement) {
+           e = e.ownerSVGElement || e;
 
-           if (feature.properties.aliases) {
-             for (var j in feature.properties.aliases) {
-               var alias = feature.properties.aliases[j].replace(idFilterRegex, '').toUpperCase();
-               featuresByCode[alias] = feature;
-             }
+           if (e.hasAttribute('viewBox')) {
+             e = e.viewBox.baseVal;
+             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
            }
-         }
-       }
 
-       function locArray(loc) {
-         if (Array.isArray(loc)) {
-           return loc;
-         } else if (loc.coordinates) {
-           return loc.coordinates;
+           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
          }
 
-         return loc.geometry.coordinates;
+         return [[0, 0], [e.clientWidth, e.clientHeight]];
        }
 
-       function smallestFeature(loc) {
-         var query = locArray(loc);
-         var featureProperties = whichPolygonGetter(query);
-         if (!featureProperties) return null;
-         return featuresByCode[featureProperties.id];
+       function defaultWheelDelta(d3_event) {
+         return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
        }
 
-       function countryFeature(loc) {
-         var feature = smallestFeature(loc);
-         if (!feature) return null;
-         var countryCode = feature.properties.country || feature.properties.iso1A2;
-         return featuresByCode[countryCode];
+       function defaultConstrain(transform, extent, translateExtent) {
+         var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
+             dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
+             dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
+             dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
+         return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
        }
 
-       function featureForLoc(loc, opts) {
-         if (opts && opts.level && opts.level !== 'country') {
-           var features = featuresContaining(loc);
-           var targetLevel = opts.level;
-           var targetLevelIndex = levels.indexOf(targetLevel);
-           if (targetLevelIndex === -1) return null;
+       function utilZoomPan() {
+         var filter = defaultFilter,
+             extent = defaultExtent,
+             constrain = defaultConstrain,
+             wheelDelta = defaultWheelDelta,
+             scaleExtent = [0, Infinity],
+             translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
+             interpolate = interpolateZoom,
+             dispatch = dispatch$8('start', 'zoom', 'end'),
+             _wheelDelay = 150,
+             _transform = identity$2,
+             _activeGesture;
 
-           for (var i in features) {
-             var _feature3 = features[i];
+         function zoom(selection) {
+           selection.on('pointerdown.zoom', pointerdown).on('wheel.zoom', wheeled).style('touch-action', 'none').style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
+           select(window).on('pointermove.zoompan', pointermove).on('pointerup.zoompan pointercancel.zoompan', pointerup);
+         }
 
-             if (_feature3.properties.level === targetLevel || levels.indexOf(_feature3.properties.level) > targetLevelIndex) {
-               return _feature3;
-             }
+         zoom.transform = function (collection, transform, point) {
+           var selection = collection.selection ? collection.selection() : collection;
+
+           if (collection !== selection) {
+             schedule(collection, transform, point);
+           } else {
+             selection.interrupt().each(function () {
+               gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
+             });
            }
+         };
 
-           return null;
-         }
+         zoom.scaleBy = function (selection, k, p) {
+           zoom.scaleTo(selection, function () {
+             var k0 = _transform.k,
+                 k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
+             return k0 * k1;
+           }, p);
+         };
 
-         return countryFeature(loc);
-       }
+         zoom.scaleTo = function (selection, k, p) {
+           zoom.transform(selection, function () {
+             var e = extent.apply(this, arguments),
+                 t0 = _transform,
+                 p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
+                 p1 = t0.invert(p0),
+                 k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
+             return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
+           }, p);
+         };
 
-       function featureForID(id) {
-         var stringID;
+         zoom.translateBy = function (selection, x, y) {
+           zoom.transform(selection, function () {
+             return constrain(_transform.translate(typeof x === 'function' ? x.apply(this, arguments) : x, typeof y === 'function' ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
+           });
+         };
 
-         if (typeof id === 'number') {
-           stringID = id.toString();
+         zoom.translateTo = function (selection, x, y, p) {
+           zoom.transform(selection, function () {
+             var e = extent.apply(this, arguments),
+                 t = _transform,
+                 p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
+             return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === 'function' ? -x.apply(this, arguments) : -x, typeof y === 'function' ? -y.apply(this, arguments) : -y), e, translateExtent);
+           }, p);
+         };
 
-           if (stringID.length === 1) {
-             stringID = '00' + stringID;
-           } else if (stringID.length === 2) {
-             stringID = '0' + stringID;
-           }
-         } else {
-           stringID = id.replace(idFilterRegex, '').toUpperCase();
+         function scale(transform, k) {
+           k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
+           return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
          }
 
-         return featuresByCode[stringID] || null;
-       }
+         function translate(transform, p0, p1) {
+           var x = p0[0] - p1[0] * transform.k,
+               y = p0[1] - p1[1] * transform.k;
+           return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
+         }
 
-       function smallestOrMatchingFeature(query) {
-         if (_typeof(query) === 'object') {
-           return smallestFeature(query);
+         function centroid(extent) {
+           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
          }
 
-         return featureForID(query);
-       }
+         function schedule(transition, transform, point) {
+           transition.on('start.zoom', function () {
+             gesture(this, arguments).start(null);
+           }).on('interrupt.zoom end.zoom', function () {
+             gesture(this, arguments).end(null);
+           }).tween('zoom', function () {
+             var that = this,
+                 args = arguments,
+                 g = gesture(that, args),
+                 e = extent.apply(that, args),
+                 p = !point ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
+                 w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
+                 a = _transform,
+                 b = typeof transform === 'function' ? transform.apply(that, args) : transform,
+                 i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
+             return function (t) {
+               if (t === 1) {
+                 // Avoid rounding error on end.
+                 t = b;
+               } else {
+                 var l = i(t);
+                 var k = w / l[2];
+                 t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
+               }
 
-       function feature(query, opts) {
-         if (_typeof(query) === 'object') {
-           return featureForLoc(query, opts);
+               g.zoom(null, null, t);
+             };
+           });
          }
 
-         return featureForID(query);
-       }
-       function iso1A2Code(query, opts) {
-         var match = feature(query, opts);
-         if (!match) return null;
-         return match.properties.iso1A2 || null;
-       }
-       function featuresContaining(query, strict) {
-         var feature = smallestOrMatchingFeature(query);
-         if (!feature) return [];
-         var features = [];
+         function gesture(that, args, clean) {
+           return !clean && _activeGesture || new Gesture(that, args);
+         }
 
-         if (!strict || _typeof(query) === 'object') {
-           features.push(feature);
+         function Gesture(that, args) {
+           this.that = that;
+           this.args = args;
+           this.active = 0;
+           this.extent = extent.apply(that, args);
          }
 
-         var properties = feature.properties;
+         Gesture.prototype = {
+           start: function start(d3_event) {
+             if (++this.active === 1) {
+               _activeGesture = this;
+               dispatch.call('start', this, d3_event);
+             }
 
-         for (var i in properties.groups) {
-           var groupID = properties.groups[i];
-           features.push(featuresByCode[groupID]);
-         }
+             return this;
+           },
+           zoom: function zoom(d3_event, key, transform) {
+             if (this.mouse && key !== 'mouse') this.mouse[1] = transform.invert(this.mouse[0]);
+             if (this.pointer0 && key !== 'touch') this.pointer0[1] = transform.invert(this.pointer0[0]);
+             if (this.pointer1 && key !== 'touch') this.pointer1[1] = transform.invert(this.pointer1[0]);
+             _transform = transform;
+             dispatch.call('zoom', this, d3_event, key, transform);
+             return this;
+           },
+           end: function end(d3_event) {
+             if (--this.active === 0) {
+               _activeGesture = null;
+               dispatch.call('end', this, d3_event);
+             }
 
-         return features;
-       }
-       function roadSpeedUnit(query) {
-         var feature = smallestOrMatchingFeature(query);
-         return feature && feature.properties.roadSpeedUnit || null;
-       }
+             return this;
+           }
+         };
 
-       var _dataDeprecated;
+         function wheeled(d3_event) {
+           if (!filter.apply(this, arguments)) return;
+           var g = gesture(this, arguments),
+               t = _transform,
+               k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
+               p = utilFastMouse(this)(d3_event); // If the mouse is in the same location as before, reuse it.
+           // If there were recent wheel events, reset the wheel idle timeout.
 
-       var _nsi;
+           if (g.wheel) {
+             if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
+               g.mouse[1] = t.invert(g.mouse[0] = p);
+             }
 
-       function validationOutdatedTags() {
-         var type = 'outdated_tags';
-         var nsiKeys = ['amenity', 'shop', 'tourism', 'leisure', 'office']; // A concern here in switching to async data means that `_dataDeprecated`
-         // and `_nsi` will not be available at first, so the data on early tiles
-         // may not have tags validated fully.
-         // initialize deprecated tags array
+             clearTimeout(g.wheel); // Otherwise, capture the mouse point and location at the start.
+           } else {
+             g.mouse = [p, t.invert(p)];
+             interrupt(this);
+             g.start(d3_event);
+           }
 
-         _mainFileFetcher.get('deprecated').then(function (d) {
-           return _dataDeprecated = d;
-         })["catch"](function () {
-           /* ignore */
-         });
-         _mainFileFetcher.get('nsi_brands').then(function (d) {
-           _nsi = {
-             brands: d.brands,
-             matcher: matcher$1(),
-             wikidata: {},
-             wikipedia: {}
-           }; // initialize name-suggestion-index matcher
+           d3_event.preventDefault();
+           d3_event.stopImmediatePropagation();
+           g.wheel = setTimeout(wheelidled, _wheelDelay);
+           g.zoom(d3_event, 'mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
 
-           _nsi.matcher.buildMatchIndex(d.brands); // index all known wikipedia and wikidata tags
+           function wheelidled() {
+             g.wheel = null;
+             g.end(d3_event);
+           }
+         }
 
+         var _downPointerIDs = new Set();
 
-           Object.keys(d.brands).forEach(function (kvnd) {
-             var brand = d.brands[kvnd];
-             var wd = brand.tags['brand:wikidata'];
-             var wp = brand.tags['brand:wikipedia'];
+         var _pointerLocGetter;
 
-             if (wd) {
-               _nsi.wikidata[wd] = kvnd;
-             }
+         function pointerdown(d3_event) {
+           _downPointerIDs.add(d3_event.pointerId);
 
-             if (wp) {
-               _nsi.wikipedia[wp] = kvnd;
-             }
-           });
-           return _nsi;
-         })["catch"](function () {
-           /* ignore */
-         });
+           if (!filter.apply(this, arguments)) return;
+           var g = gesture(this, arguments, _downPointerIDs.size === 1);
+           var started;
+           d3_event.stopImmediatePropagation();
+           _pointerLocGetter = utilFastMouse(this);
 
-         function oldTagIssues(entity, graph) {
-           var oldTags = Object.assign({}, entity.tags); // shallow copy
+           var loc = _pointerLocGetter(d3_event);
 
-           var preset = _mainPresetIndex.match(entity, graph);
-           var subtype = 'deprecated_tags';
-           if (!preset) return []; // upgrade preset..
+           var p = [loc, _transform.invert(loc), d3_event.pointerId];
 
-           if (preset.replacement) {
-             var newPreset = _mainPresetIndex.item(preset.replacement);
-             graph = actionChangePreset(entity.id, preset, newPreset, true
-             /* skip field defaults */
-             )(graph);
-             entity = graph.entity(entity.id);
-             preset = newPreset;
-           } // upgrade tags..
+           if (!g.pointer0) {
+             g.pointer0 = p;
+             started = true;
+           } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
+             g.pointer1 = p;
+           }
 
+           if (started) {
+             interrupt(this);
+             g.start(d3_event);
+           }
+         }
 
-           if (_dataDeprecated) {
-             var deprecatedTags = entity.deprecatedTags(_dataDeprecated);
+         function pointermove(d3_event) {
+           if (!_downPointerIDs.has(d3_event.pointerId)) return;
+           if (!_activeGesture || !_pointerLocGetter) return;
+           var g = gesture(this, arguments);
+           var isPointer0 = g.pointer0 && g.pointer0[2] === d3_event.pointerId;
+           var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === d3_event.pointerId;
 
-             if (deprecatedTags.length) {
-               deprecatedTags.forEach(function (tag) {
-                 graph = actionUpgradeTags(entity.id, tag.old, tag.replace)(graph);
-               });
-               entity = graph.entity(entity.id);
-             }
-           } // add missing addTags..
+           if ((isPointer0 || isPointer1) && 'buttons' in d3_event && !d3_event.buttons) {
+             // The pointer went up without ending the gesture somehow, e.g.
+             // a down mouse was moved off the map and released. End it here.
+             if (g.pointer0) _downPointerIDs["delete"](g.pointer0[2]);
+             if (g.pointer1) _downPointerIDs["delete"](g.pointer1[2]);
+             g.end(d3_event);
+             return;
+           }
+
+           d3_event.preventDefault();
+           d3_event.stopImmediatePropagation();
 
+           var loc = _pointerLocGetter(d3_event);
 
-           var newTags = Object.assign({}, entity.tags); // shallow copy
+           var t, p, l;
+           if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
+           t = _transform;
 
-           if (preset.tags !== preset.addTags) {
-             Object.keys(preset.addTags).forEach(function (k) {
-               if (!newTags[k]) {
-                 if (preset.addTags[k] === '*') {
-                   newTags[k] = 'yes';
-                 } else {
-                   newTags[k] = preset.addTags[k];
-                 }
-               }
-             });
+           if (g.pointer1) {
+             var p0 = g.pointer0[0],
+                 l0 = g.pointer0[1],
+                 p1 = g.pointer1[0],
+                 l1 = g.pointer1[1],
+                 dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
+                 dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
+             t = scale(t, Math.sqrt(dp / dl));
+             p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
+             l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
+           } else if (g.pointer0) {
+             p = g.pointer0[0];
+             l = g.pointer0[1];
+           } else {
+             return;
            }
 
-           if (_nsi) {
-             // Do `wikidata` or `wikipedia` identify this entity as a brand?  #6416
-             // If so, these tags can be swapped to `brand:wikidata`/`brand:wikipedia`
-             var isBrand;
+           g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+         }
 
-             if (newTags.wikidata) {
-               // try matching `wikidata`
-               isBrand = _nsi.wikidata[newTags.wikidata];
-             }
+         function pointerup(d3_event) {
+           if (!_downPointerIDs.has(d3_event.pointerId)) return;
 
-             if (!isBrand && newTags.wikipedia) {
-               // fallback to `wikipedia`
-               isBrand = _nsi.wikipedia[newTags.wikipedia];
-             }
+           _downPointerIDs["delete"](d3_event.pointerId);
 
-             if (isBrand && !newTags.office) {
-               // but avoid doing this for corporate offices
-               if (newTags.wikidata) {
-                 newTags['brand:wikidata'] = newTags.wikidata;
-                 delete newTags.wikidata;
-               }
+           if (!_activeGesture) return;
+           var g = gesture(this, arguments);
+           d3_event.stopImmediatePropagation();
+           if (g.pointer0 && g.pointer0[2] === d3_event.pointerId) delete g.pointer0;else if (g.pointer1 && g.pointer1[2] === d3_event.pointerId) delete g.pointer1;
 
-               if (newTags.wikipedia) {
-                 newTags['brand:wikipedia'] = newTags.wikipedia;
-                 delete newTags.wikipedia;
-               } // I considered setting `name` and other tags here, but they aren't unique per wikidata
-               // (Q2759586 -> in USA "Papa John's", in Russia "Папа Джонс")
-               // So users will really need to use a preset or assign `name` themselves.
+           if (g.pointer1 && !g.pointer0) {
+             g.pointer0 = g.pointer1;
+             delete g.pointer1;
+           }
 
-             } // try key/value|name match against name-suggestion-index
+           if (g.pointer0) {
+             g.pointer0[1] = _transform.invert(g.pointer0[0]);
+           } else {
+             g.end(d3_event);
+           }
+         }
 
+         zoom.wheelDelta = function (_) {
+           return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
+         };
 
-             if (newTags.name) {
-               for (var i = 0; i < nsiKeys.length; i++) {
-                 var k = nsiKeys[i];
-                 if (!newTags[k]) continue;
-                 var center = entity.extent(graph).center();
-                 var countryCode = iso1A2Code(center);
+         zoom.filter = function (_) {
+           return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
+         };
 
-                 var match = _nsi.matcher.matchKVN(k, newTags[k], newTags.name, countryCode && countryCode.toLowerCase());
+         zoom.extent = function (_) {
+           return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
+         };
 
-                 if (!match) continue; // for now skip ambiguous matches (like Target~(USA) vs Target~(Australia))
+         zoom.scaleExtent = function (_) {
+           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
+         };
 
-                 if (match.d) continue;
-                 var brand = _nsi.brands[match.kvnd];
+         zoom.translateExtent = function (_) {
+           return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+         };
 
-                 if (brand && brand.tags['brand:wikidata'] && brand.tags['brand:wikidata'] !== entity.tags['not:brand:wikidata']) {
-                   subtype = 'noncanonical_brand';
-                   var keepTags = ['takeaway'].reduce(function (acc, k) {
-                     if (newTags[k]) {
-                       acc[k] = newTags[k];
-                     }
+         zoom.constrain = function (_) {
+           return arguments.length ? (constrain = _, zoom) : constrain;
+         };
 
-                     return acc;
-                   }, {});
-                   nsiKeys.forEach(function (k) {
-                     return delete newTags[k];
-                   });
-                   Object.assign(newTags, brand.tags, keepTags);
-                   break;
-                 }
-               }
-             }
-           } // determine diff
+         zoom.interpolate = function (_) {
+           return arguments.length ? (interpolate = _, zoom) : interpolate;
+         };
 
+         zoom._transform = function (_) {
+           return arguments.length ? (_transform = _, zoom) : _transform;
+         };
 
-           var tagDiff = utilTagDiff(oldTags, newTags);
-           if (!tagDiff.length) return [];
-           var isOnlyAddingTags = tagDiff.every(function (d) {
-             return d.type === '+';
-           });
-           var prefix = '';
+         return utilRebind(zoom, dispatch, 'on');
+       }
 
-           if (subtype === 'noncanonical_brand') {
-             prefix = 'noncanonical_brand.';
-           } else if (subtype === 'deprecated_tags' && isOnlyAddingTags) {
-             subtype = 'incomplete_tags';
-             prefix = 'incomplete.';
-           } // don't allow autofixing brand tags
+       // if pointer events are supported. Falls back to default `dblclick` event.
 
+       function utilDoubleUp() {
+         var dispatch = dispatch$8('doubleUp');
+         var _maxTimespan = 500; // milliseconds
 
-           var autoArgs = subtype !== 'noncanonical_brand' ? [doUpgrade, _t('issues.fix.upgrade_tags.annotation')] : null;
-           return [new validationIssue({
-             type: type,
-             subtype: subtype,
-             severity: 'warning',
-             message: showMessage,
-             reference: showReference,
-             entityIds: [entity.id],
-             hash: JSON.stringify(tagDiff),
-             dynamicFixes: function dynamicFixes() {
-               return [new validationIssueFix({
-                 autoArgs: autoArgs,
-                 title: _t.html('issues.fix.upgrade_tags.title'),
-                 onClick: function onClick(context) {
-                   context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
-                 }
-               })];
-             }
-           })];
+         var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
 
-           function doUpgrade(graph) {
-             var currEntity = graph.hasEntity(entity.id);
-             if (!currEntity) return graph;
-             var newTags = Object.assign({}, currEntity.tags); // shallow copy
+         var _pointer; // object representing the pointer that could trigger double up
 
-             tagDiff.forEach(function (diff) {
-               if (diff.type === '-') {
-                 delete newTags[diff.key];
-               } else if (diff.type === '+') {
-                 newTags[diff.key] = diff.newVal;
-               }
-             });
-             return actionChangeTags(currEntity.id, newTags)(graph);
-           }
 
-           function showMessage(context) {
-             var currEntity = context.hasEntity(entity.id);
-             if (!currEntity) return '';
-             var messageID = "issues.outdated_tags.".concat(prefix, "message");
+         function pointerIsValidFor(loc) {
+           // second pointerup must occur within a small timeframe after the first pointerdown
+           return new Date().getTime() - _pointer.startTime <= _maxTimespan && // all pointer events must occur within a small distance of the first pointerdown
+           geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
+         }
 
-             if (subtype === 'noncanonical_brand' && isOnlyAddingTags) {
-               messageID += '_incomplete';
-             }
+         function pointerdown(d3_event) {
+           // ignore right-click
+           if (d3_event.ctrlKey || d3_event.button === 2) return;
+           var loc = [d3_event.clientX, d3_event.clientY]; // Don't rely on pointerId here since it can change between pointerdown
+           // events on touch devices
 
-             return _t.html(messageID, {
-               feature: utilDisplayLabel(currEntity, context.graph())
-             });
+           if (_pointer && !pointerIsValidFor(loc)) {
+             // if this pointer is no longer valid, clear it so another can be started
+             _pointer = undefined;
            }
 
-           function showReference(selection) {
-             var enter = selection.selectAll('.issue-reference').data([0]).enter();
-             enter.append('div').attr('class', 'issue-reference').html(_t.html("issues.outdated_tags.".concat(prefix, "reference")));
-             enter.append('strong').html(_t.html('issues.suggested'));
-             enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
-               var klass = d.type === '+' ? 'add' : 'remove';
-               return "tagDiff-cell tagDiff-cell-".concat(klass);
-             }).html(function (d) {
-               return d.display;
-             });
+           if (!_pointer) {
+             _pointer = {
+               startLoc: loc,
+               startTime: new Date().getTime(),
+               upCount: 0,
+               pointerId: d3_event.pointerId
+             };
+           } else {
+             // double down
+             _pointer.pointerId = d3_event.pointerId;
            }
          }
 
-         function oldMultipolygonIssues(entity, graph) {
-           var multipolygon, outerWay;
-
-           if (entity.type === 'relation') {
-             outerWay = osmOldMultipolygonOuterMemberOfRelation(entity, graph);
-             multipolygon = entity;
-           } else if (entity.type === 'way') {
-             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
-             outerWay = entity;
-           } else {
-             return [];
-           }
+         function pointerup(d3_event) {
+           // ignore right-click
+           if (d3_event.ctrlKey || d3_event.button === 2) return;
+           if (!_pointer || _pointer.pointerId !== d3_event.pointerId) return;
+           _pointer.upCount += 1;
 
-           if (!multipolygon || !outerWay) return [];
-           return [new validationIssue({
-             type: type,
-             subtype: 'old_multipolygon',
-             severity: 'warning',
-             message: showMessage,
-             reference: showReference,
-             entityIds: [outerWay.id, multipolygon.id],
-             dynamicFixes: function dynamicFixes() {
-               return [new validationIssueFix({
-                 autoArgs: [doUpgrade, _t('issues.fix.move_tags.annotation')],
-                 title: _t.html('issues.fix.move_tags.title'),
-                 onClick: function onClick(context) {
-                   context.perform(doUpgrade, _t('issues.fix.move_tags.annotation'));
-                 }
-               })];
-             }
-           })];
+           if (_pointer.upCount === 2) {
+             // double up!
+             var loc = [d3_event.clientX, d3_event.clientY];
 
-           function doUpgrade(graph) {
-             var currMultipolygon = graph.hasEntity(multipolygon.id);
-             var currOuterWay = graph.hasEntity(outerWay.id);
-             if (!currMultipolygon || !currOuterWay) return graph;
-             currMultipolygon = currMultipolygon.mergeTags(currOuterWay.tags);
-             graph = graph.replace(currMultipolygon);
-             return actionChangeTags(currOuterWay.id, {})(graph);
-           }
+             if (pointerIsValidFor(loc)) {
+               var locInThis = utilFastMouse(this)(d3_event);
+               dispatch.call('doubleUp', this, d3_event, locInThis);
+             } // clear the pointer info in any case
 
-           function showMessage(context) {
-             var currMultipolygon = context.hasEntity(multipolygon.id);
-             if (!currMultipolygon) return '';
-             return _t.html('issues.old_multipolygon.message', {
-               multipolygon: utilDisplayLabel(currMultipolygon, context.graph())
-             });
-           }
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.old_multipolygon.reference'));
+             _pointer = undefined;
            }
          }
 
-         var validation = function checkOutdatedTags(entity, graph) {
-           var issues = oldMultipolygonIssues(entity, graph);
-           if (!issues.length) issues = oldTagIssues(entity, graph);
-           return issues;
+         function doubleUp(selection) {
+           if ('PointerEvent' in window) {
+             // dblclick isn't well supported on touch devices so manually use
+             // pointer events if they're available
+             selection.on('pointerdown.doubleUp', pointerdown).on('pointerup.doubleUp', pointerup);
+           } else {
+             // fallback to dblclick
+             selection.on('dblclick.doubleUp', function (d3_event) {
+               dispatch.call('doubleUp', this, d3_event, utilFastMouse(this)(d3_event));
+             });
+           }
+         }
+
+         doubleUp.off = function (selection) {
+           selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
          };
 
-         validation.type = type;
-         return validation;
+         return utilRebind(doubleUp, dispatch, 'on');
        }
 
-       function validationPrivateData() {
-         var type = 'private_data'; // assume that some buildings are private
+       var TILESIZE = 256;
+       var minZoom = 2;
+       var maxZoom = 24;
+       var kMin = geoZoomToScale(minZoom, TILESIZE);
+       var kMax = geoZoomToScale(maxZoom, TILESIZE);
 
-         var privateBuildingValues = {
-           detached: true,
-           farm: true,
-           house: true,
-           houseboat: true,
-           residential: true,
-           semidetached_house: true,
-           static_caravan: true
-         }; // but they might be public if they have one of these other tags
+       function clamp$1(num, min, max) {
+         return Math.max(min, Math.min(num, max));
+       }
 
-         var publicKeys = {
-           amenity: true,
-           craft: true,
-           historic: true,
-           leisure: true,
-           office: true,
-           shop: true,
-           tourism: true
-         }; // these tags may contain personally identifying info
+       function rendererMap(context) {
+         var dispatch = dispatch$8('move', 'drawn', 'crossEditableZoom', 'hitMinZoom', 'changeHighlighting', 'changeAreaFill');
+         var projection = context.projection;
+         var curtainProjection = context.curtainProjection;
+         var drawLayers;
+         var drawPoints;
+         var drawVertices;
+         var drawLines;
+         var drawAreas;
+         var drawMidpoints;
+         var drawLabels;
 
-         var personalTags = {
-           'contact:email': true,
-           'contact:fax': true,
-           'contact:phone': true,
-           email: true,
-           fax: true,
-           phone: true
-         };
+         var _selection = select(null);
 
-         var validation = function checkPrivateData(entity) {
-           var tags = entity.tags;
-           if (!tags.building || !privateBuildingValues[tags.building]) return [];
-           var keepTags = {};
+         var supersurface = select(null);
+         var wrapper = select(null);
+         var surface = select(null);
+         var _dimensions = [1, 1];
+         var _dblClickZoomEnabled = true;
+         var _redrawEnabled = true;
 
-           for (var k in tags) {
-             if (publicKeys[k]) return []; // probably a public feature
+         var _gestureTransformStart;
 
-             if (!personalTags[k]) {
-               keepTags[k] = tags[k];
-             }
-           }
+         var _transformStart = projection.transform();
 
-           var tagDiff = utilTagDiff(tags, keepTags);
-           if (!tagDiff.length) return [];
-           var fixID = tagDiff.length === 1 ? 'remove_tag' : 'remove_tags';
-           return [new validationIssue({
-             type: type,
-             severity: 'warning',
-             message: showMessage,
-             reference: showReference,
-             entityIds: [entity.id],
-             dynamicFixes: function dynamicFixes() {
-               return [new validationIssueFix({
-                 icon: 'iD-operation-delete',
-                 title: _t.html('issues.fix.' + fixID + '.title'),
-                 onClick: function onClick(context) {
-                   context.perform(doUpgrade, _t('issues.fix.upgrade_tags.annotation'));
-                 }
-               })];
-             }
-           })];
+         var _transformLast;
 
-           function doUpgrade(graph) {
-             var currEntity = graph.hasEntity(entity.id);
-             if (!currEntity) return graph;
-             var newTags = Object.assign({}, currEntity.tags); // shallow copy
+         var _isTransformed = false;
+         var _minzoom = 0;
 
-             tagDiff.forEach(function (diff) {
-               if (diff.type === '-') {
-                 delete newTags[diff.key];
-               } else if (diff.type === '+') {
-                 newTags[diff.key] = diff.newVal;
-               }
-             });
-             return actionChangeTags(currEntity.id, newTags)(graph);
-           }
+         var _getMouseCoords;
 
-           function showMessage(context) {
-             var currEntity = context.hasEntity(this.entityIds[0]);
-             if (!currEntity) return '';
-             return _t.html('issues.private_data.contact.message', {
-               feature: utilDisplayLabel(currEntity, context.graph())
-             });
-           }
+         var _lastPointerEvent;
 
-           function showReference(selection) {
-             var enter = selection.selectAll('.issue-reference').data([0]).enter();
-             enter.append('div').attr('class', 'issue-reference').html(_t.html('issues.private_data.reference'));
-             enter.append('strong').html(_t.html('issues.suggested'));
-             enter.append('table').attr('class', 'tagDiff-table').selectAll('.tagDiff-row').data(tagDiff).enter().append('tr').attr('class', 'tagDiff-row').append('td').attr('class', function (d) {
-               var klass = d.type === '+' ? 'add' : 'remove';
-               return 'tagDiff-cell tagDiff-cell-' + klass;
-             }).html(function (d) {
-               return d.display;
-             });
-           }
-         };
+         var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
 
-         validation.type = type;
-         return validation;
-       }
 
-       var _discardNameRegexes = [];
-       function validationSuspiciousName() {
-         var type = 'suspicious_name';
-         var keysToTestForGenericValues = ['aerialway', 'aeroway', 'amenity', 'building', 'craft', 'highway', 'leisure', 'railway', 'man_made', 'office', 'shop', 'tourism', 'waterway']; // A concern here in switching to async data means that `_nsiFilters` will not
-         // be available at first, so the data on early tiles may not have tags validated fully.
+         var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
 
-         _mainFileFetcher.get('nsi_filters').then(function (filters) {
-           // known list of generic names (e.g. "bar")
-           _discardNameRegexes = filters.discardNames.map(function (discardName) {
-             return new RegExp(discardName, 'i');
-           });
-         })["catch"](function () {
-           /* ignore */
-         });
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
 
-         function isDiscardedSuggestionName(lowercaseName) {
-           return _discardNameRegexes.some(function (regex) {
-             return regex.test(lowercaseName);
-           });
-         } // test if the name is just the key or tag value (e.g. "park")
 
+         var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
 
-         function nameMatchesRawTag(lowercaseName, tags) {
-           for (var i = 0; i < keysToTestForGenericValues.length; i++) {
-             var key = keysToTestForGenericValues[i];
-             var val = tags[key];
+         var _zoomerPanner = _zoomerPannerFunction().scaleExtent([kMin, kMax]).interpolate(interpolate$1).filter(zoomEventFilter).on('zoom.map', zoomPan).on('start.map', function (d3_event) {
+           _pointerDown = d3_event && (d3_event.type === 'pointerdown' || d3_event.sourceEvent && d3_event.sourceEvent.type === 'pointerdown');
+         }).on('end.map', function () {
+           _pointerDown = false;
+         });
 
-             if (val) {
-               val = val.toLowerCase();
+         var _doubleUpHandler = utilDoubleUp();
 
-               if (key === lowercaseName || val === lowercaseName || key.replace(/\_/g, ' ') === lowercaseName || val.replace(/\_/g, ' ') === lowercaseName) {
-                 return true;
-               }
-             }
-           }
+         var scheduleRedraw = throttle(redraw, 750); // var isRedrawScheduled = false;
+         // var pendingRedrawCall;
+         // function scheduleRedraw() {
+         //     // Only schedule the redraw if one has not already been set.
+         //     if (isRedrawScheduled) return;
+         //     isRedrawScheduled = true;
+         //     var that = this;
+         //     var args = arguments;
+         //     pendingRedrawCall = window.requestIdleCallback(function () {
+         //         // Reset the boolean so future redraws can be set.
+         //         isRedrawScheduled = false;
+         //         redraw.apply(that, args);
+         //     }, { timeout: 1400 });
+         // }
 
-           return false;
-         }
 
-         function isGenericName(name, tags) {
-           name = name.toLowerCase();
-           return nameMatchesRawTag(name, tags) || isDiscardedSuggestionName(name);
+         function cancelPendingRedraw() {
+           scheduleRedraw.cancel(); // isRedrawScheduled = false;
+           // window.cancelIdleCallback(pendingRedrawCall);
          }
 
-         function makeGenericNameIssue(entityId, nameKey, genericName, langCode) {
-           return new validationIssue({
-             type: type,
-             subtype: 'generic_name',
-             severity: 'warning',
-             message: function message(context) {
-               var entity = context.hasEntity(this.entityIds[0]);
-               if (!entity) return '';
-               var preset = _mainPresetIndex.match(entity, context.graph());
-               var langName = langCode && _mainLocalizer.languageName(langCode);
-               return _t.html('issues.generic_name.message' + (langName ? '_language' : ''), {
-                 feature: preset.name(),
-                 name: genericName,
-                 language: langName
-               });
-             },
-             reference: showReference,
-             entityIds: [entityId],
-             hash: nameKey + '=' + genericName,
-             dynamicFixes: function dynamicFixes() {
-               return [new validationIssueFix({
-                 icon: 'iD-operation-delete',
-                 title: _t.html('issues.fix.remove_the_name.title'),
-                 onClick: function onClick(context) {
-                   var entityId = this.issue.entityIds[0];
-                   var entity = context.entity(entityId);
-                   var tags = Object.assign({}, entity.tags); // shallow copy
-
-                   delete tags[nameKey];
-                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_generic_name.annotation'));
-                 }
-               })];
-             }
-           });
+         function map(selection) {
+           _selection = selection;
+           context.on('change.map', immediateRedraw);
+           var osm = context.connection();
 
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
+           if (osm) {
+             osm.on('change.map', immediateRedraw);
            }
-         }
 
-         function makeIncorrectNameIssue(entityId, nameKey, incorrectName, langCode) {
-           return new validationIssue({
-             type: type,
-             subtype: 'not_name',
-             severity: 'warning',
-             message: function message(context) {
-               var entity = context.hasEntity(this.entityIds[0]);
-               if (!entity) return '';
-               var preset = _mainPresetIndex.match(entity, context.graph());
-               var langName = langCode && _mainLocalizer.languageName(langCode);
-               return _t.html('issues.incorrect_name.message' + (langName ? '_language' : ''), {
-                 feature: preset.name(),
-                 name: incorrectName,
-                 language: langName
-               });
-             },
-             reference: showReference,
-             entityIds: [entityId],
-             hash: nameKey + '=' + incorrectName,
-             dynamicFixes: function dynamicFixes() {
-               return [new validationIssueFix({
-                 icon: 'iD-operation-delete',
-                 title: _t.html('issues.fix.remove_the_name.title'),
-                 onClick: function onClick(context) {
-                   var entityId = this.issue.entityIds[0];
-                   var entity = context.entity(entityId);
-                   var tags = Object.assign({}, entity.tags); // shallow copy
+           function didUndoOrRedo(targetTransform) {
+             var mode = context.mode().id;
+             if (mode !== 'browse' && mode !== 'select') return;
 
-                   delete tags[nameKey];
-                   context.perform(actionChangeTags(entityId, tags), _t('issues.fix.remove_mistaken_name.annotation'));
-                 }
-               })];
+             if (targetTransform) {
+               map.transformEase(targetTransform);
              }
-           });
-
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.generic_name.reference'));
            }
-         }
 
-         var validation = function checkGenericName(entity) {
-           // a generic name is okay if it's a known brand or entity
-           if (entity.hasWikidata()) return [];
-           var issues = [];
-           var notNames = (entity.tags['not:name'] || '').split(';');
+           context.history().on('merge.map', function () {
+             scheduleRedraw();
+           }).on('change.map', immediateRedraw).on('undone.map', function (stack, fromStack) {
+             didUndoOrRedo(fromStack.transform);
+           }).on('redone.map', function (stack) {
+             didUndoOrRedo(stack.transform);
+           });
+           context.background().on('change.map', immediateRedraw);
+           context.features().on('redraw.map', immediateRedraw);
+           drawLayers.on('change.map', function () {
+             context.background().updateImagery();
+             immediateRedraw();
+           });
+           selection.on('wheel.map mousewheel.map', function (d3_event) {
+             // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
+             d3_event.preventDefault();
+           }).call(_zoomerPanner).call(_zoomerPanner.transform, projection.transform()).on('dblclick.zoom', null); // override d3-zoom dblclick handling
 
-           for (var key in entity.tags) {
-             var m = key.match(/^name(?:(?::)([a-zA-Z_-]+))?$/);
-             if (!m) continue;
-             var langCode = m.length >= 2 ? m[1] : null;
-             var value = entity.tags[key];
+           map.supersurface = supersurface = selection.append('div').attr('class', 'supersurface').call(utilSetTransform, 0, 0); // Need a wrapper div because Opera can't cope with an absolutely positioned
+           // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16
 
-             if (notNames.length) {
-               for (var i in notNames) {
-                 var notName = notNames[i];
+           wrapper = supersurface.append('div').attr('class', 'layer layer-data');
+           map.surface = surface = wrapper.call(drawLayers).selectAll('.surface');
+           surface.call(drawLabels.observe).call(_doubleUpHandler).on(_pointerPrefix + 'down.zoom', function (d3_event) {
+             _lastPointerEvent = d3_event;
 
-                 if (notName && value === notName) {
-                   issues.push(makeIncorrectNameIssue(entity.id, key, value, langCode));
-                   continue;
-                 }
-               }
+             if (d3_event.button === 2) {
+               d3_event.stopPropagation();
              }
+           }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
+             _lastPointerEvent = d3_event;
 
-             if (isGenericName(value, entity.tags)) {
-               issues.push(makeGenericNameIssue(entity.id, key, value, langCode));
+             if (resetTransform()) {
+               immediateRedraw();
              }
-           }
-
-           return issues;
-         };
-
-         validation.type = type;
-         return validation;
-       }
+           }).on(_pointerPrefix + 'move.map', function (d3_event) {
+             _lastPointerEvent = d3_event;
+           }).on(_pointerPrefix + 'over.vertices', function (d3_event) {
+             if (map.editableDataEnabled() && !_isTransformed) {
+               var hover = d3_event.target.__data__;
+               surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+               dispatch.call('drawn', this, {
+                 full: false
+               });
+             }
+           }).on(_pointerPrefix + 'out.vertices', function (d3_event) {
+             if (map.editableDataEnabled() && !_isTransformed) {
+               var hover = d3_event.relatedTarget && d3_event.relatedTarget.__data__;
+               surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
+               dispatch.call('drawn', this, {
+                 full: false
+               });
+             }
+           });
+           var detected = utilDetect(); // only WebKit supports gesture events
 
-       function validationUnsquareWay(context) {
-         var type = 'unsquare_way';
-         var DEFAULT_DEG_THRESHOLD = 5; // see also issues.js
-         // use looser epsilon for detection to reduce warnings of buildings that are essentially square already
+           if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+           // but we only need to do this on desktop Safari anyway. – #7694
+           !detected.isMobileWebKit) {
+             // Desktop Safari sends gesture events for multitouch trackpad pinches.
+             // We can listen for these and translate them into map zooms.
+             surface.on('gesturestart.surface', function (d3_event) {
+               d3_event.preventDefault();
+               _gestureTransformStart = projection.transform();
+             }).on('gesturechange.surface', gestureChange);
+           } // must call after surface init
 
-         var epsilon = 0.05;
-         var nodeThreshold = 10;
 
-         function isBuilding(entity, graph) {
-           if (entity.type !== 'way' || entity.geometry(graph) !== 'area') return false;
-           return entity.tags.building && entity.tags.building !== 'no';
-         }
+           updateAreaFill();
 
-         var validation = function checkUnsquareWay(entity, graph) {
-           if (!isBuilding(entity, graph)) return []; // don't flag ways marked as physically unsquare
+           _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
+             if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
 
-           if (entity.tags.nonsquare === 'yes') return [];
-           var isClosed = entity.isClosed();
-           if (!isClosed) return []; // this building has bigger problems
-           // don't flag ways with lots of nodes since they are likely detail-mapped
+             if (_typeof(d3_event.target.__data__) === 'object' && // or area fills
+             !select(d3_event.target).classed('fill')) return;
+             var zoomOut = d3_event.shiftKey;
+             var t = projection.transform();
+             var p1 = t.invert(p0);
+             t = t.scale(zoomOut ? 0.5 : 2);
+             t.x = p0[0] - p1[0] * t.k;
+             t.y = p0[1] - p1[1] * t.k;
+             map.transformEase(t);
+           });
 
-           var nodes = graph.childNodes(entity).slice(); // shallow copy
+           context.on('enter.map', function () {
+             if (!map.editableDataEnabled(true
+             /* skip zoom check */
+             )) return;
+             if (_isTransformed) return; // redraw immediately any objects affected by a change in selectedIDs.
 
-           if (nodes.length > nodeThreshold + 1) return []; // +1 because closing node appears twice
-           // ignore if not all nodes are fully downloaded
+             var graph = context.graph();
+             var selectedAndParents = {};
+             context.selectedIDs().forEach(function (id) {
+               var entity = graph.hasEntity(id);
 
-           var osm = services.osm;
-           if (!osm || nodes.some(function (node) {
-             return !osm.isDataLoaded(node.loc);
-           })) return []; // don't flag connected ways to avoid unresolvable unsquare loops
+               if (entity) {
+                 selectedAndParents[entity.id] = entity;
 
-           var hasConnectedSquarableWays = nodes.some(function (node) {
-             return graph.parentWays(node).some(function (way) {
-               if (way.id === entity.id) return false;
-               if (isBuilding(way, graph)) return true;
-               return graph.parentRelations(way).some(function (parentRelation) {
-                 return parentRelation.isMultipolygon() && parentRelation.tags.building && parentRelation.tags.building !== 'no';
-               });
+                 if (entity.type === 'node') {
+                   graph.parentWays(entity).forEach(function (parent) {
+                     selectedAndParents[parent.id] = parent;
+                   });
+                 }
+               }
              });
-           });
-           if (hasConnectedSquarableWays) return []; // user-configurable square threshold
+             var data = Object.values(selectedAndParents);
 
-           var storedDegreeThreshold = corePreferences('validate-square-degrees');
-           var degreeThreshold = isNaN(storedDegreeThreshold) ? DEFAULT_DEG_THRESHOLD : parseFloat(storedDegreeThreshold);
-           var points = nodes.map(function (node) {
-             return context.projection(node.loc);
-           });
-           if (!geoOrthoCanOrthogonalize(points, isClosed, epsilon, degreeThreshold, true)) return [];
-           var autoArgs; // don't allow autosquaring features linked to wikidata
+             var filter = function filter(d) {
+               return d.id in selectedAndParents;
+             };
 
-           if (!entity.tags.wikidata) {
-             // use same degree threshold as for detection
-             var autoAction = actionOrthogonalize(entity.id, context.projection, undefined, degreeThreshold);
-             autoAction.transitionable = false; // when autofixing, do it instantly
+             data = context.features().filter(data, graph);
+             surface.call(drawVertices.drawSelected, graph, map.extent()).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent());
+             dispatch.call('drawn', this, {
+               full: false
+             }); // redraw everything else later
 
-             autoArgs = [autoAction, _t('operations.orthogonalize.annotation.feature', {
-               n: 1
-             })];
-           }
+             scheduleRedraw();
+           });
+           map.dimensions(utilGetDimensions(selection));
+         }
 
-           return [new validationIssue({
-             type: type,
-             subtype: 'building',
-             severity: 'warning',
-             message: function message(context) {
-               var entity = context.hasEntity(this.entityIds[0]);
-               return entity ? _t.html('issues.unsquare_way.message', {
-                 feature: utilDisplayLabel(entity, context.graph())
-               }) : '';
-             },
-             reference: showReference,
-             entityIds: [entity.id],
-             hash: JSON.stringify(autoArgs !== undefined) + degreeThreshold,
-             dynamicFixes: function dynamicFixes() {
-               return [new validationIssueFix({
-                 icon: 'iD-operation-orthogonalize',
-                 title: _t.html('issues.fix.square_feature.title'),
-                 autoArgs: autoArgs,
-                 onClick: function onClick(context, completionHandler) {
-                   var entityId = this.issue.entityIds[0]; // use same degree threshold as for detection
+         function zoomEventFilter(d3_event) {
+           // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
+           // Intercept `mousedown` and check if there is an orphaned zoom gesture.
+           // This can happen if a previous `mousedown` occurred without a `mouseup`.
+           // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
+           // so that d3-zoom won't stop propagation of new `mousedown` events.
+           if (d3_event.type === 'mousedown') {
+             var hasOrphan = false;
+             var listeners = window.__on;
 
-                   context.perform(actionOrthogonalize(entityId, context.projection, undefined, degreeThreshold), _t('operations.orthogonalize.annotation.feature', {
-                     n: 1
-                   })); // run after the squaring transition (currently 150ms)
+             for (var i = 0; i < listeners.length; i++) {
+               var listener = listeners[i];
 
-                   window.setTimeout(function () {
-                     completionHandler();
-                   }, 175);
-                 }
-               })
-               /*
-               new validationIssueFix({
-                   title: t.html('issues.fix.tag_as_unsquare.title'),
-                   onClick: function(context) {
-                       var entityId = this.issue.entityIds[0];
-                       var entity = context.entity(entityId);
-                       var tags = Object.assign({}, entity.tags);  // shallow copy
-                       tags.nonsquare = 'yes';
-                       context.perform(
-                           actionChangeTags(entityId, tags),
-                           t('issues.fix.tag_as_unsquare.annotation')
-                       );
-                   }
-               })
-               */
-               ];
+               if (listener.name === 'zoom' && listener.type === 'mouseup') {
+                 hasOrphan = true;
+                 break;
+               }
              }
-           })];
-
-           function showReference(selection) {
-             selection.selectAll('.issue-reference').data([0]).enter().append('div').attr('class', 'issue-reference').html(_t.html('issues.unsquare_way.buildings.reference'));
-           }
-         };
-
-         validation.type = type;
-         return validation;
-       }
 
-       var Validations = /*#__PURE__*/Object.freeze({
-               __proto__: null,
-               validationAlmostJunction: validationAlmostJunction,
-               validationCloseNodes: validationCloseNodes,
-               validationCrossingWays: validationCrossingWays,
-               validationDisconnectedWay: validationDisconnectedWay,
-               validationFormatting: validationFormatting,
-               validationHelpRequest: validationHelpRequest,
-               validationImpossibleOneway: validationImpossibleOneway,
-               validationIncompatibleSource: validationIncompatibleSource,
-               validationMaprules: validationMaprules,
-               validationMismatchedGeometry: validationMismatchedGeometry,
-               validationMissingRole: validationMissingRole,
-               validationMissingTag: validationMissingTag,
-               validationOutdatedTags: validationOutdatedTags,
-               validationPrivateData: validationPrivateData,
-               validationSuspiciousName: validationSuspiciousName,
-               validationUnsquareWay: validationUnsquareWay
-       });
+             if (hasOrphan) {
+               var event = window.CustomEvent;
 
-       function coreValidator(context) {
-         var dispatch$1 = dispatch('validated', 'focusedIssue');
-         var validator = utilRebind({}, dispatch$1, 'on');
-         var _rules = {};
-         var _disabledRules = {};
-         var _ignoredIssueIDs = {}; // issue.id -> true
+               if (event) {
+                 event = new event('mouseup');
+               } else {
+                 event = window.document.createEvent('Event');
+                 event.initEvent('mouseup', false, false);
+               } // Event needs to be dispatched with an event.view property.
 
-         var _baseCache = validationCache(); // issues before any user edits
 
+               event.view = window;
+               window.dispatchEvent(event);
+             }
+           }
 
-         var _headCache = validationCache(); // issues after all user edits
+           return d3_event.button !== 2; // ignore right clicks
+         }
 
+         function pxCenter() {
+           return [_dimensions[0] / 2, _dimensions[1] / 2];
+         }
 
-         var _validatedGraph = null;
+         function drawEditable(difference, extent) {
+           var mode = context.mode();
+           var graph = context.graph();
+           var features = context.features();
+           var all = context.history().intersects(map.extent());
+           var fullRedraw = false;
+           var data;
+           var set;
+           var filter;
+           var applyFeatureLayerFilters = true;
 
-         var _deferred = new Set(); //
-         // initialize the validator rulesets
-         //
+           if (map.isInWideSelection()) {
+             data = [];
+             utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function (id) {
+               var entity = context.hasEntity(id);
+               if (entity) data.push(entity);
+             });
+             fullRedraw = true;
+             filter = utilFunctor(true); // selected features should always be visible, so we can skip filtering
 
+             applyFeatureLayerFilters = false;
+           } else if (difference) {
+             var complete = difference.complete(map.extent());
+             data = Object.values(complete).filter(Boolean);
+             set = new Set(Object.keys(complete));
 
-         validator.init = function () {
-           Object.values(Validations).forEach(function (validation) {
-             if (typeof validation !== 'function') return;
-             var fn = validation(context);
-             var key = fn.type;
-             _rules[key] = fn;
-           });
-           var disabledRules = corePreferences('validate-disabledRules');
+             filter = function filter(d) {
+               return set.has(d.id);
+             };
 
-           if (disabledRules) {
-             disabledRules.split(',').forEach(function (key) {
-               _disabledRules[key] = true;
-             });
-           }
-         };
+             features.clear(data);
+           } else {
+             // force a full redraw if gatherStats detects that a feature
+             // should be auto-hidden (e.g. points or buildings)..
+             if (features.gatherStats(all, graph, _dimensions)) {
+               extent = undefined;
+             }
 
-         function reset(resetIgnored) {
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
+             if (extent) {
+               data = context.history().intersects(map.extent().intersection(extent));
+               set = new Set(data.map(function (entity) {
+                 return entity.id;
+               }));
 
-             _deferred["delete"](handle);
-           }); // clear caches
+               filter = function filter(d) {
+                 return set.has(d.id);
+               };
+             } else {
+               data = all;
+               fullRedraw = true;
+               filter = utilFunctor(true);
+             }
+           }
 
-           if (resetIgnored) _ignoredIssueIDs = {};
-           _baseCache = validationCache();
-           _headCache = validationCache();
-           _validatedGraph = null;
-         } //
-         // clear caches, called whenever iD resets after a save
-         //
+           if (applyFeatureLayerFilters) {
+             data = features.filter(data, graph);
+           } else {
+             context.features().resetStats();
+           }
 
+           if (mode && mode.id === 'select') {
+             // update selected vertices - the user might have just double-clicked a way,
+             // creating a new vertex, triggering a partial redraw without a mode change
+             surface.call(drawVertices.drawSelected, graph, map.extent());
+           }
 
-         validator.reset = function () {
-           reset(true);
+           surface.call(drawVertices, graph, data, filter, map.extent(), fullRedraw).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent()).call(drawLabels, graph, data, filter, _dimensions, fullRedraw).call(drawPoints, graph, data, filter);
+           dispatch.call('drawn', this, {
+             full: true
+           });
+         }
+
+         map.init = function () {
+           drawLayers = svgLayers(projection, context);
+           drawPoints = svgPoints(projection, context);
+           drawVertices = svgVertices(projection, context);
+           drawLines = svgLines(projection, context);
+           drawAreas = svgAreas(projection, context);
+           drawMidpoints = svgMidpoints(projection, context);
+           drawLabels = svgLabels(projection, context);
          };
 
-         validator.resetIgnoredIssues = function () {
-           _ignoredIssueIDs = {}; // reload UI
+         function editOff() {
+           context.features().resetStats();
+           surface.selectAll('.layer-osm *').remove();
+           surface.selectAll('.layer-touch:not(.markers) *').remove();
+           var allowed = {
+             'browse': true,
+             'save': true,
+             'select-note': true,
+             'select-data': true,
+             'select-error': true
+           };
+           var mode = context.mode();
+
+           if (mode && !allowed[mode.id]) {
+             context.enter(modeBrowse(context));
+           }
 
-           dispatch$1.call('validated');
-         }; // must update issues when the user changes the unsquare thereshold
+           dispatch.call('drawn', this, {
+             full: true
+           });
+         }
 
+         function gestureChange(d3_event) {
+           // Remap Safari gesture events to wheel events - #5492
+           // We want these disabled most places, but enabled for zoom/unzoom on map surface
+           // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
+           var e = d3_event;
+           e.preventDefault();
+           var props = {
+             deltaMode: 0,
+             // dummy values to ignore in zoomPan
+             deltaY: 1,
+             // dummy values to ignore in zoomPan
+             clientX: e.clientX,
+             clientY: e.clientY,
+             screenX: e.screenX,
+             screenY: e.screenY,
+             x: e.x,
+             y: e.y
+           };
+           var e2 = new WheelEvent('wheel', props);
+           e2._scale = e.scale; // preserve the original scale
 
-         validator.reloadUnsquareIssues = function () {
-           reloadUnsquareIssues(_headCache, context.graph());
-           reloadUnsquareIssues(_baseCache, context.history().base());
-           dispatch$1.call('validated');
-         };
+           e2._rotation = e.rotation; // preserve the original rotation
 
-         function reloadUnsquareIssues(cache, graph) {
-           var checkUnsquareWay = _rules.unsquare_way;
-           if (typeof checkUnsquareWay !== 'function') return; // uncache existing
+           _selection.node().dispatchEvent(e2);
+         }
 
-           cache.uncacheIssuesOfType('unsquare_way');
-           var buildings = context.history().tree().intersects(geoExtent([-180, -90], [180, 90]), graph) // everywhere
-           .filter(function (entity) {
-             return entity.type === 'way' && entity.tags.building && entity.tags.building !== 'no';
-           }); // rerun for all buildings
+         function zoomPan(event, key, transform) {
+           var source = event && event.sourceEvent || event;
+           var eventTransform = transform || event && event.transform;
+           var x = eventTransform.x;
+           var y = eventTransform.y;
+           var k = eventTransform.k; // Special handling of 'wheel' events:
+           // They might be triggered by the user scrolling the mouse wheel,
+           // or 2-finger pinch/zoom gestures, the transform may need adjustment.
 
-           buildings.forEach(function (entity) {
-             var detected = checkUnsquareWay(entity, graph);
-             if (detected.length !== 1) return;
-             var issue = detected[0];
+           if (source && source.type === 'wheel') {
+             // assume that the gesture is already handled by pointer events
+             if (_pointerDown) return;
+             var detected = utilDetect();
+             var dX = source.deltaX;
+             var dY = source.deltaY;
+             var x2 = x;
+             var y2 = y;
+             var k2 = k;
+             var t0, p0, p1; // Normalize mousewheel scroll speed (Firefox) - #3029
+             // If wheel delta is provided in LINE units, recalculate it in PIXEL units
+             // We are essentially redoing the calculations that occur here:
+             //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
+             // See this for more info:
+             //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
 
-             if (!cache.issuesByEntityID[entity.id]) {
-               cache.issuesByEntityID[entity.id] = new Set();
-             }
+             if (source.deltaMode === 1
+             /* LINE */
+             ) {
+               // Convert from lines to pixels, more if the user is scrolling fast.
+               // (I made up the exp function to roughly match Firefox to what Chrome does)
+               // These numbers should be floats, because integers are treated as pan gesture below.
+               var lines = Math.abs(source.deltaY);
+               var sign = source.deltaY > 0 ? 1 : -1;
+               dY = sign * clamp$1(Math.exp((lines - 1) * 0.75) * 4.000244140625, 4.000244140625, // min
+               350.000244140625 // max
+               ); // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
+               // There doesn't seem to be any scroll acceleration.
+               // This multiplier increases the speed a little bit - #5512
+
+               if (detected.os !== 'mac') {
+                 dY *= 5;
+               } // recalculate x2,y2,k2
 
-             cache.issuesByEntityID[entity.id].add(issue.id);
-             cache.issuesByIssueID[issue.id] = issue;
-           });
-         } // options = {
-         //     what: 'all',     // 'all' or 'edited'
-         //     where: 'all',   // 'all' or 'visible'
-         //     includeIgnored: false   // true, false, or 'only'
-         //     includeDisabledRules: false   // true, false, or 'only'
-         // };
 
+               t0 = _isTransformed ? _transformLast : _transformStart;
+               p0 = _getMouseCoords(source);
+               p1 = t0.invert(p0);
+               k2 = t0.k * Math.pow(2, -dY / 500);
+               k2 = clamp$1(k2, kMin, kMax);
+               x2 = p0[0] - p1[0] * k2;
+               y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (Safari) - #5492
+               // These are fake `wheel` events we made from Safari `gesturechange` events..
+             } else if (source._scale) {
+               // recalculate x2,y2,k2
+               t0 = _gestureTransformStart;
+               p0 = _getMouseCoords(source);
+               p1 = t0.invert(p0);
+               k2 = t0.k * source._scale;
+               k2 = clamp$1(k2, kMin, kMax);
+               x2 = p0[0] - p1[0] * k2;
+               y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (all browsers except Safari) - #5492
+               // Pinch zooming via the `wheel` event will always have:
+               // - `ctrlKey = true`
+               // - `deltaY` is not round integer pixels (ignore `deltaX`)
+             } else if (source.ctrlKey && !isInteger(dY)) {
+               dY *= 6; // slightly scale up whatever the browser gave us
+               // recalculate x2,y2,k2
 
-         validator.getIssues = function (options) {
-           var opts = Object.assign({
-             what: 'all',
-             where: 'all',
-             includeIgnored: false,
-             includeDisabledRules: false
-           }, options);
-           var issues = Object.values(_headCache.issuesByIssueID);
-           var view = context.map().extent();
-           return issues.filter(function (issue) {
-             if (!issue) return false;
-             if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) return false;
-             if (!opts.includeDisabledRules && _disabledRules[issue.type]) return false;
-             if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) return false;
-             if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) return false; // Sanity check:  This issue may be for an entity that not longer exists.
-             // If we detect this, uncache and return false so it is not included..
+               t0 = _isTransformed ? _transformLast : _transformStart;
+               p0 = _getMouseCoords(source);
+               p1 = t0.invert(p0);
+               k2 = t0.k * Math.pow(2, -dY / 500);
+               k2 = clamp$1(k2, kMin, kMax);
+               x2 = p0[0] - p1[0] * k2;
+               y2 = p0[1] - p1[1] * k2; // Trackpad scroll zooming with shift or alt/option key down
+             } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
+               // recalculate x2,y2,k2
+               t0 = _isTransformed ? _transformLast : _transformStart;
+               p0 = _getMouseCoords(source);
+               p1 = t0.invert(p0);
+               k2 = t0.k * Math.pow(2, -dY / 500);
+               k2 = clamp$1(k2, kMin, kMax);
+               x2 = p0[0] - p1[0] * k2;
+               y2 = p0[1] - p1[1] * k2; // 2 finger map panning (Mac only, all browsers except Firefox #8595) - #5492, #5512
+               // Panning via the `wheel` event will always have:
+               // - `ctrlKey = false`
+               // - `deltaX`,`deltaY` are round integer pixels
+             } else if (detected.os === 'mac' && detected.browser !== 'Firefox' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
+               p1 = projection.translate();
+               x2 = p1[0] - dX;
+               y2 = p1[1] - dY;
+               k2 = projection.scale();
+               k2 = clamp$1(k2, kMin, kMax);
+             } // something changed - replace the event transform
 
-             var entityIds = issue.entityIds || [];
 
-             for (var i = 0; i < entityIds.length; i++) {
-               var entityId = entityIds[i];
+             if (x2 !== x || y2 !== y || k2 !== k) {
+               x = x2;
+               y = y2;
+               k = k2;
+               eventTransform = identity$2.translate(x2, y2).scale(k2);
 
-               if (!context.hasEntity(entityId)) {
-                 delete _headCache.issuesByEntityID[entityId];
-                 delete _headCache.issuesByIssueID[issue.id];
-                 return false;
+               if (_zoomerPanner._transform) {
+                 // utilZoomPan interface
+                 _zoomerPanner._transform(eventTransform);
+               } else {
+                 // d3_zoom interface
+                 _selection.node().__zoom = eventTransform;
                }
              }
+           }
 
-             if (opts.what === 'edited' && _baseCache.issuesByIssueID[issue.id]) return false;
+           if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
+             return; // no change
+           }
 
-             if (opts.where === 'visible') {
-               var extent = issue.extent(context.graph());
-               if (!view.intersects(extent)) return false;
-             }
+           if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
+             surface.interrupt();
+             dispatch.call('hitMinZoom', this, map);
+             setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
+             scheduleRedraw();
+             dispatch.call('move', this, map);
+             return;
+           }
 
-             return true;
-           });
-         };
+           projection.transform(eventTransform);
+           var withinEditableZoom = map.withinEditableZoom();
 
-         validator.getResolvedIssues = function () {
-           var baseIssues = Object.values(_baseCache.issuesByIssueID);
-           return baseIssues.filter(function (issue) {
-             return !_headCache.issuesByIssueID[issue.id];
-           });
-         };
+           if (_lastWithinEditableZoom !== withinEditableZoom) {
+             if (_lastWithinEditableZoom !== undefined) {
+               // notify that the map zoomed in or out over the editable zoom threshold
+               dispatch.call('crossEditableZoom', this, withinEditableZoom);
+             }
 
-         validator.focusIssue = function (issue) {
-           var extent = issue.extent(context.graph());
+             _lastWithinEditableZoom = withinEditableZoom;
+           }
 
-           if (extent) {
-             var setZoom = Math.max(context.map().zoom(), 19);
-             context.map().unobscuredCenterZoomEase(extent.center(), setZoom); // select the first entity
+           var scale = k / _transformStart.k;
+           var tX = (x / scale - _transformStart.x) * scale;
+           var tY = (y / scale - _transformStart.y) * scale;
 
-             if (issue.entityIds && issue.entityIds.length) {
-               window.setTimeout(function () {
-                 var ids = issue.entityIds;
-                 context.enter(modeSelect(context, [ids[0]]));
-                 dispatch$1.call('focusedIssue', this, issue);
-               }, 250); // after ease
-             }
+           if (context.inIntro()) {
+             curtainProjection.transform({
+               x: x - tX,
+               y: y - tY,
+               k: k
+             });
            }
-         };
 
-         validator.getIssuesBySeverity = function (options) {
-           var groups = utilArrayGroupBy(validator.getIssues(options), 'severity');
-           groups.error = groups.error || [];
-           groups.warning = groups.warning || [];
-           return groups;
-         }; // show some issue types in a particular order
+           if (source) {
+             _lastPointerEvent = event;
+           }
 
+           _isTransformed = true;
+           _transformLast = eventTransform;
+           utilSetTransform(supersurface, tX, tY, scale);
+           scheduleRedraw();
+           dispatch.call('move', this, map);
 
-         var orderedIssueTypes = [// flag missing data first
-         'missing_tag', 'missing_role', // then flag identity issues
-         'outdated_tags', 'mismatched_geometry', // flag geometry issues where fixing them might solve connectivity issues
-         'crossing_ways', 'almost_junction', // then flag connectivity issues
-         'disconnected_way', 'impossible_oneway']; // returns the issues that the given entity IDs have in common, matching the given options
+           function isInteger(val) {
+             return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
+           }
+         }
 
-         validator.getSharedEntityIssues = function (entityIDs, options) {
-           var cache = _headCache; // gather the issues that are common to all the entities
+         function resetTransform() {
+           if (!_isTransformed) return false;
+           utilSetTransform(supersurface, 0, 0);
+           _isTransformed = false;
 
-           var issueIDs = entityIDs.reduce(function (acc, entityID) {
-             var entityIssueIDs = cache.issuesByEntityID[entityID] || new Set();
+           if (context.inIntro()) {
+             curtainProjection.transform(projection.transform());
+           }
 
-             if (!acc) {
-               return new Set(entityIssueIDs);
-             }
+           return true;
+         }
 
-             return new Set(_toConsumableArray(acc).filter(function (elem) {
-               return entityIssueIDs.has(elem);
-             }));
-           }, null) || [];
-           var opts = options || {};
-           return Array.from(issueIDs).map(function (id) {
-             return cache.issuesByIssueID[id];
-           }).filter(function (issue) {
-             if (!issue) return false;
-             if (opts.includeDisabledRules === 'only' && !_disabledRules[issue.type]) return false;
-             if (!opts.includeDisabledRules && _disabledRules[issue.type]) return false;
-             if (opts.includeIgnored === 'only' && !_ignoredIssueIDs[issue.id]) return false;
-             if (!opts.includeIgnored && _ignoredIssueIDs[issue.id]) return false;
-             return true;
-           }).sort(function (issue1, issue2) {
-             if (issue1.type === issue2.type) {
-               // issues of the same type, sort deterministically
-               return issue1.id < issue2.id ? -1 : 1;
-             }
+         function redraw(difference, extent) {
+           if (surface.empty() || !_redrawEnabled) return; // If we are in the middle of a zoom/pan, we can't do differenced redraws.
+           // It would result in artifacts where differenced entities are redrawn with
+           // one transform and unchanged entities with another.
 
-             var index1 = orderedIssueTypes.indexOf(issue1.type);
-             var index2 = orderedIssueTypes.indexOf(issue2.type);
+           if (resetTransform()) {
+             difference = extent = undefined;
+           }
 
-             if (index1 !== -1 && index2 !== -1) {
-               // both issue types have explicit sort orders
-               return index1 - index2;
-             } else if (index1 === -1 && index2 === -1) {
-               // neither issue type has an explicit sort order, sort by type
-               return issue1.type < issue2.type ? -1 : 1;
-             } else {
-               // order explicit types before everything else
-               return index1 !== -1 ? -1 : 1;
-             }
-           });
-         };
+           var zoom = map.zoom();
+           var z = String(~~zoom);
 
-         validator.getEntityIssues = function (entityID, options) {
-           return validator.getSharedEntityIssues([entityID], options);
-         };
+           if (surface.attr('data-zoom') !== z) {
+             surface.attr('data-zoom', z);
+           } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
 
-         validator.getRuleKeys = function () {
-           return Object.keys(_rules);
-         };
 
-         validator.isRuleEnabled = function (key) {
-           return !_disabledRules[key];
-         };
+           var lat = map.center()[1];
+           var lowzoom = linear().domain([-60, 0, 60]).range([17, 18.5, 17]).clamp(true);
+           surface.classed('low-zoom', zoom <= lowzoom(lat));
 
-         validator.toggleRule = function (key) {
-           if (_disabledRules[key]) {
-             delete _disabledRules[key];
+           if (!difference) {
+             supersurface.call(context.background());
+             wrapper.call(drawLayers);
+           } // OSM
+
+
+           if (map.editableDataEnabled() || map.isInWideSelection()) {
+             context.loadTiles(projection);
+             drawEditable(difference, extent);
            } else {
-             _disabledRules[key] = true;
+             editOff();
            }
 
-           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-           validator.validate();
-         };
+           _transformStart = projection.transform();
+           return map;
+         }
 
-         validator.disableRules = function (keys) {
-           _disabledRules = {};
-           keys.forEach(function (k) {
-             _disabledRules[k] = true;
-           });
-           corePreferences('validate-disabledRules', Object.keys(_disabledRules).join(','));
-           validator.validate();
+         var immediateRedraw = function immediateRedraw(difference, extent) {
+           if (!difference && !extent) cancelPendingRedraw();
+           redraw(difference, extent);
          };
 
-         validator.ignoreIssue = function (id) {
-           _ignoredIssueIDs[id] = true;
-         }; //
-         // Run validation on a single entity for the given graph
-         //
-
-
-         function validateEntity(entity, graph) {
-           var entityIssues = []; // runs validation and appends resulting issues
+         map.lastPointerEvent = function () {
+           return _lastPointerEvent;
+         };
 
-           function runValidation(key) {
-             var fn = _rules[key];
+         map.mouse = function (d3_event) {
+           var event = d3_event || _lastPointerEvent;
 
-             if (typeof fn !== 'function') {
-               console.error('no such validation rule = ' + key); // eslint-disable-line no-console
+           if (event) {
+             var s;
 
-               return;
+             while (s = event.sourceEvent) {
+               event = s;
              }
 
-             var detected = fn(entity, graph);
-             entityIssues = entityIssues.concat(detected);
-           } // run all rules
+             return _getMouseCoords(event);
+           }
 
+           return null;
+         }; // returns Lng/Lat
 
-           Object.keys(_rules).forEach(runValidation);
-           return entityIssues;
-         }
 
-         function entityIDsToValidate(entityIDs, graph) {
-           var processedIDs = new Set();
-           return entityIDs.reduce(function (acc, entityID) {
-             // keep redundancy check separate from `acc` because an `entityID`
-             // could have been added to `acc` as a related entity through an earlier pass
-             if (processedIDs.has(entityID)) return acc;
-             processedIDs.add(entityID);
-             var entity = graph.hasEntity(entityID);
-             if (!entity) return acc;
-             acc.add(entityID);
-             var checkParentRels = [entity];
+         map.mouseCoordinates = function () {
+           var coord = map.mouse() || pxCenter();
+           return projection.invert(coord);
+         };
 
-             if (entity.type === 'node') {
-               graph.parentWays(entity).forEach(function (parentWay) {
-                 acc.add(parentWay.id); // include parent ways
+         map.dblclickZoomEnable = function (val) {
+           if (!arguments.length) return _dblClickZoomEnabled;
+           _dblClickZoomEnabled = val;
+           return map;
+         };
 
-                 checkParentRels.push(parentWay);
-               });
-             } else if (entity.type === 'relation') {
-               entity.members.forEach(function (member) {
-                 acc.add(member.id); // include members
-               });
-             } else if (entity.type === 'way') {
-               entity.nodes.forEach(function (nodeID) {
-                 acc.add(nodeID); // include child nodes
+         map.redrawEnable = function (val) {
+           if (!arguments.length) return _redrawEnabled;
+           _redrawEnabled = val;
+           return map;
+         };
 
-                 graph._parentWays[nodeID].forEach(function (wayID) {
-                   acc.add(wayID); // include connected ways
-                 });
-               });
-             }
+         map.isTransformed = function () {
+           return _isTransformed;
+         };
 
-             checkParentRels.forEach(function (entity) {
-               // include parent relations
-               if (entity.type !== 'relation') {
-                 // but not super-relations
-                 graph.parentRelations(entity).forEach(function (parentRelation) {
-                   acc.add(parentRelation.id);
-                 });
-               }
-             });
-             return acc;
-           }, new Set());
-         } //
-         // Run validation for several entities, supplied `entityIDs`,
-         // against `graph` for the given `cache`
-         //
+         function setTransform(t2, duration, force) {
+           var t = projection.transform();
+           if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;
 
+           if (duration) {
+             _selection.transition().duration(duration).on('start', function () {
+               map.startEase();
+             }).call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
+           } else {
+             projection.transform(t2);
+             _transformStart = t2;
 
-         function validateEntities(entityIDs, graph, cache) {
-           // clear caches for existing issues related to these entities
-           entityIDs.forEach(cache.uncacheEntityID); // detect new issues and update caches
+             _selection.call(_zoomerPanner.transform, _transformStart);
+           }
 
-           entityIDs.forEach(function (entityID) {
-             var entity = graph.hasEntity(entityID); // don't validate deleted entities
+           return true;
+         }
 
-             if (!entity) return;
-             var issues = validateEntity(entity, graph);
-             cache.cacheIssues(issues);
-           });
-         } //
-         // Validates anything that has changed since the last time it was run.
-         // Also updates the "validatedGraph" to be the current graph
-         // and dispatches a `validated` event when finished.
-         //
+         function setCenterZoom(loc2, z2, duration, force) {
+           var c = map.center();
+           var z = map.zoom();
+           if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) return false;
+           var proj = geoRawMercator().transform(projection.transform()); // copy projection
 
+           var k2 = clamp$1(geoZoomToScale(z2, TILESIZE), kMin, kMax);
+           proj.scale(k2);
+           var t = proj.translate();
+           var point = proj(loc2);
+           var center = pxCenter();
+           t[0] += center[0] - point[0];
+           t[1] += center[1] - point[1];
+           return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
+         }
 
-         validator.validate = function () {
-           var currGraph = context.graph();
-           _validatedGraph = _validatedGraph || context.history().base();
+         map.pan = function (delta, duration) {
+           var t = projection.translate();
+           var k = projection.scale();
+           t[0] += delta[0];
+           t[1] += delta[1];
 
-           if (currGraph === _validatedGraph) {
-             dispatch$1.call('validated');
-             return;
-           }
+           if (duration) {
+             _selection.transition().duration(duration).on('start', function () {
+               map.startEase();
+             }).call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
+           } else {
+             projection.translate(t);
+             _transformStart = projection.transform();
 
-           var oldGraph = _validatedGraph;
-           var difference = coreDifference(oldGraph, currGraph);
-           _validatedGraph = currGraph;
-           var createdAndModifiedEntityIDs = difference.extantIDs(true); // created/modified (true = w/relation members)
+             _selection.call(_zoomerPanner.transform, _transformStart);
 
-           var entityIDsToCheck = entityIDsToValidate(createdAndModifiedEntityIDs, currGraph); // check modified and deleted entities against the old graph in order to update their related entities
-           // (e.g. deleting the only highway connected to a road should create a disconnected highway issue)
+             dispatch.call('move', this, map);
+             immediateRedraw();
+           }
 
-           var modifiedAndDeletedEntityIDs = difference.deleted().concat(difference.modified()).map(function (entity) {
-             return entity.id;
-           });
-           var entityIDsToCheckForOldGraph = entityIDsToValidate(modifiedAndDeletedEntityIDs, oldGraph); // concat the sets
+           return map;
+         };
 
-           entityIDsToCheckForOldGraph.forEach(entityIDsToCheck.add, entityIDsToCheck);
-           validateEntities(entityIDsToCheck, context.graph(), _headCache);
-           dispatch$1.call('validated');
+         map.dimensions = function (val) {
+           if (!arguments.length) return _dimensions;
+           _dimensions = val;
+           drawLayers.dimensions(_dimensions);
+           context.background().dimensions(_dimensions);
+           projection.clipExtent([[0, 0], _dimensions]);
+           _getMouseCoords = utilFastMouse(supersurface.node());
+           scheduleRedraw();
+           return map;
          };
 
-         context.history().on('reset.validator', function () {
-           // cached issues aren't valid any longer if the history has been reset
-           reset(false);
-           validator.validate();
-         }); // WHEN TO RUN VALIDATION:
-         // When graph changes:
-
-         context.history().on('restore.validator', validator.validate) // restore saved history
-         .on('undone.validator', validator.validate) // undo
-         .on('redone.validator', validator.validate); // redo
-         // but not on 'change' (e.g. while drawing)
-         // When user changes editing modes:
-
-         context.on('exit.validator', validator.validate); // When merging fetched data:
-
-         context.history().on('merge.validator', function (entities) {
-           if (!entities) return;
-           var handle = window.requestIdleCallback(function () {
-             var entityIDs = entities.map(function (entity) {
-               return entity.id;
-             });
-             var headGraph = context.graph();
-             validateEntities(entityIDsToValidate(entityIDs, headGraph), headGraph, _headCache);
-             var baseGraph = context.history().base();
-             validateEntities(entityIDsToValidate(entityIDs, baseGraph), baseGraph, _baseCache);
-             dispatch$1.call('validated');
-           });
-
-           _deferred.add(handle);
-         });
-         return validator;
-       }
+         function zoomIn(delta) {
+           setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
+         }
 
-       function validationCache() {
-         var cache = {
-           issuesByIssueID: {},
-           // issue.id -> issue
-           issuesByEntityID: {} // entity.id -> set(issue.id)
+         function zoomOut(delta) {
+           setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
+         }
 
+         map.zoomIn = function () {
+           zoomIn(1);
          };
 
-         cache.cacheIssues = function (issues) {
-           issues.forEach(function (issue) {
-             var entityIds = issue.entityIds || [];
-             entityIds.forEach(function (entityId) {
-               if (!cache.issuesByEntityID[entityId]) {
-                 cache.issuesByEntityID[entityId] = new Set();
-               }
+         map.zoomInFurther = function () {
+           zoomIn(4);
+         };
 
-               cache.issuesByEntityID[entityId].add(issue.id);
-             });
-             cache.issuesByIssueID[issue.id] = issue;
-           });
+         map.canZoomIn = function () {
+           return map.zoom() < maxZoom;
          };
 
-         cache.uncacheIssue = function (issue) {
-           // When multiple entities are involved (e.g. crossing_ways),
-           // remove this issue from the other entity caches too..
-           var entityIds = issue.entityIds || [];
-           entityIds.forEach(function (entityId) {
-             if (cache.issuesByEntityID[entityId]) {
-               cache.issuesByEntityID[entityId]["delete"](issue.id);
-             }
-           });
-           delete cache.issuesByIssueID[issue.id];
+         map.zoomOut = function () {
+           zoomOut(1);
          };
 
-         cache.uncacheIssues = function (issues) {
-           issues.forEach(cache.uncacheIssue);
+         map.zoomOutFurther = function () {
+           zoomOut(4);
          };
 
-         cache.uncacheIssuesOfType = function (type) {
-           var issuesOfType = Object.values(cache.issuesByIssueID).filter(function (issue) {
-             return issue.type === type;
-           });
-           cache.uncacheIssues(issuesOfType);
-         }; //
-         // Remove a single entity and all its related issues from the caches
-         //
+         map.canZoomOut = function () {
+           return map.zoom() > minZoom;
+         };
 
+         map.center = function (loc2) {
+           if (!arguments.length) {
+             return projection.invert(pxCenter());
+           }
 
-         cache.uncacheEntityID = function (entityID) {
-           var issueIDs = cache.issuesByEntityID[entityID];
-           if (!issueIDs) return;
-           issueIDs.forEach(function (issueID) {
-             var issue = cache.issuesByIssueID[issueID];
+           if (setCenterZoom(loc2, map.zoom())) {
+             dispatch.call('move', this, map);
+           }
 
-             if (issue) {
-               cache.uncacheIssue(issue);
-             } else {
-               delete cache.issuesByIssueID[issueID];
-             }
-           });
-           delete cache.issuesByEntityID[entityID];
+           scheduleRedraw();
+           return map;
          };
 
-         return cache;
-       }
+         map.unobscuredCenterZoomEase = function (loc, zoom) {
+           var offset = map.unobscuredOffsetPx();
+           var proj = geoRawMercator().transform(projection.transform()); // copy projection
+           // use the target zoom to calculate the offset center
 
-       function coreUploader(context) {
-         var dispatch$1 = dispatch( // Start and end events are dispatched exactly once each per legitimate outside call to `save`
-         'saveStarted', // dispatched as soon as a call to `save` has been deemed legitimate
-         'saveEnded', // dispatched after the result event has been dispatched
-         'willAttemptUpload', // dispatched before the actual upload call occurs, if it will
-         'progressChanged', // Each save results in one of these outcomes:
-         'resultNoChanges', // upload wasn't attempted since there were no edits
-         'resultErrors', // upload failed due to errors
-         'resultConflicts', // upload failed due to data conflicts
-         'resultSuccess' // upload completed without errors
-         );
-         var _isSaving = false;
-         var _conflicts = [];
-         var _errors = [];
+           proj.scale(geoZoomToScale(zoom, TILESIZE));
+           var locPx = proj(loc);
+           var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
+           var offsetLoc = proj.invert(offsetLocPx);
+           map.centerZoomEase(offsetLoc, zoom);
+         };
 
-         var _origChanges;
+         map.unobscuredOffsetPx = function () {
+           var openPane = context.container().select('.map-panes .map-pane.shown');
 
-         var _discardTags = {};
-         _mainFileFetcher.get('discarded').then(function (d) {
-           _discardTags = d;
-         })["catch"](function () {
-           /* ignore */
-         });
-         var uploader = utilRebind({}, dispatch$1, 'on');
+           if (!openPane.empty()) {
+             return [openPane.node().offsetWidth / 2, 0];
+           }
 
-         uploader.isSaving = function () {
-           return _isSaving;
+           return [0, 0];
          };
 
-         uploader.save = function (changeset, tryAgain, checkConflicts) {
-           // Guard against accidentally entering save code twice - #4641
-           if (_isSaving && !tryAgain) {
-             return;
+         map.zoom = function (z2) {
+           if (!arguments.length) {
+             return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
            }
 
-           var osm = context.connection();
-           if (!osm) return; // If user somehow got logged out mid-save, try to reauthenticate..
-           // This can happen if they were logged in from before, but the tokens are no longer valid.
-
-           if (!osm.authenticated()) {
-             osm.authenticate(function (err) {
-               if (!err) {
-                 uploader.save(changeset, tryAgain, checkConflicts); // continue where we left off..
-               }
-             });
-             return;
+           if (z2 < _minzoom) {
+             surface.interrupt();
+             dispatch.call('hitMinZoom', this, map);
+             z2 = context.minEditableZoom();
            }
 
-           if (!_isSaving) {
-             _isSaving = true;
-             dispatch$1.call('saveStarted', this);
+           if (setCenterZoom(map.center(), z2)) {
+             dispatch.call('move', this, map);
            }
 
-           var history = context.history();
-           _conflicts = [];
-           _errors = []; // Store original changes, in case user wants to download them as an .osc file
-
-           _origChanges = history.changes(actionDiscardTags(history.difference(), _discardTags)); // First time, `history.perform` a no-op action.
-           // Any conflict resolutions will be done as `history.replace`
-           // Remember to pop this later if needed
+           scheduleRedraw();
+           return map;
+         };
 
-           if (!tryAgain) {
-             history.perform(actionNoop());
-           } // Attempt a fast upload.. If there are conflicts, re-enter with `checkConflicts = true`
+         map.centerZoom = function (loc2, z2) {
+           if (setCenterZoom(loc2, z2)) {
+             dispatch.call('move', this, map);
+           }
 
+           scheduleRedraw();
+           return map;
+         };
 
-           if (!checkConflicts) {
-             upload(changeset); // Do the full (slow) conflict check..
-           } else {
-             performFullConflictCheck(changeset);
-           }
+         map.zoomTo = function (entity) {
+           var extent = entity.extent(context.graph());
+           if (!isFinite(extent.area())) return map;
+           var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+           return map.centerZoom(extent.center(), z2);
          };
 
-         function performFullConflictCheck(changeset) {
-           var osm = context.connection();
-           if (!osm) return;
-           var history = context.history();
-           var localGraph = context.graph();
-           var remoteGraph = coreGraph(history.base(), true);
-           var summary = history.difference().summary();
-           var _toCheck = [];
+         map.centerEase = function (loc2, duration) {
+           duration = duration || 250;
+           setCenterZoom(loc2, map.zoom(), duration);
+           return map;
+         };
 
-           for (var i = 0; i < summary.length; i++) {
-             var item = summary[i];
+         map.zoomEase = function (z2, duration) {
+           duration = duration || 250;
+           setCenterZoom(map.center(), z2, duration, false);
+           return map;
+         };
 
-             if (item.changeType === 'modified') {
-               _toCheck.push(item.entity.id);
-             }
-           }
+         map.centerZoomEase = function (loc2, z2, duration) {
+           duration = duration || 250;
+           setCenterZoom(loc2, z2, duration, false);
+           return map;
+         };
 
-           var _toLoad = withChildNodes(_toCheck, localGraph);
+         map.transformEase = function (t2, duration) {
+           duration = duration || 250;
+           setTransform(t2, duration, false
+           /* don't force */
+           );
+           return map;
+         };
 
-           var _loaded = {};
-           var _toLoadCount = 0;
-           var _toLoadTotal = _toLoad.length;
+         map.zoomToEase = function (obj, duration) {
+           var extent;
 
-           if (_toCheck.length) {
-             dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+           if (Array.isArray(obj)) {
+             obj.forEach(function (entity) {
+               var entityExtent = entity.extent(context.graph());
 
-             _toLoad.forEach(function (id) {
-               _loaded[id] = false;
+               if (!extent) {
+                 extent = entityExtent;
+               } else {
+                 extent = extent.extend(entityExtent);
+               }
              });
-
-             osm.loadMultiple(_toLoad, loaded);
            } else {
-             upload(changeset);
+             extent = obj.extent(context.graph());
            }
 
-           return;
+           if (!isFinite(extent.area())) return map;
+           var z2 = clamp$1(map.trimmedExtentZoom(extent), 0, 20);
+           return map.centerZoomEase(extent.center(), z2, duration);
+         };
 
-           function withChildNodes(ids, graph) {
-             var s = new Set(ids);
-             ids.forEach(function (id) {
-               var entity = graph.entity(id);
-               if (entity.type !== 'way') return;
-               graph.childNodes(entity).forEach(function (child) {
-                 if (child.version !== undefined) {
-                   s.add(child.id);
-                 }
-               });
-             });
-             return Array.from(s);
-           } // Reload modified entities into an alternate graph and check for conflicts..
+         map.startEase = function () {
+           utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
+             map.cancelEase();
+           });
+           return map;
+         };
 
+         map.cancelEase = function () {
+           _selection.interrupt();
 
-           function loaded(err, result) {
-             if (_errors.length) return;
+           return map;
+         };
 
-             if (err) {
-               _errors.push({
-                 msg: err.message || err.responseText,
-                 details: [_t('save.status_code', {
-                   code: err.status
-                 })]
-               });
+         map.extent = function (val) {
+           if (!arguments.length) {
+             return new geoExtent(projection.invert([0, _dimensions[1]]), projection.invert([_dimensions[0], 0]));
+           } else {
+             var extent = geoExtent(val);
+             map.centerZoom(extent.center(), map.extentZoom(extent));
+           }
+         };
 
-               didResultInErrors();
-             } else {
-               var loadMore = [];
-               result.data.forEach(function (entity) {
-                 remoteGraph.replace(entity);
-                 _loaded[entity.id] = true;
-                 _toLoad = _toLoad.filter(function (val) {
-                   return val !== entity.id;
-                 });
-                 if (!entity.visible) return; // Because loadMultiple doesn't download /full like loadEntity,
-                 // need to also load children that aren't already being checked..
+         map.trimmedExtent = function (val) {
+           if (!arguments.length) {
+             var headerY = 71;
+             var footerY = 30;
+             var pad = 10;
+             return new geoExtent(projection.invert([pad, _dimensions[1] - footerY - pad]), projection.invert([_dimensions[0] - pad, headerY + pad]));
+           } else {
+             var extent = geoExtent(val);
+             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
+           }
+         };
 
-                 var i, id;
+         function calcExtentZoom(extent, dim) {
+           var tl = projection([extent[0][0], extent[1][1]]);
+           var br = projection([extent[1][0], extent[0][1]]); // Calculate maximum zoom that fits extent
 
-                 if (entity.type === 'way') {
-                   for (i = 0; i < entity.nodes.length; i++) {
-                     id = entity.nodes[i];
+           var hFactor = (br[0] - tl[0]) / dim[0];
+           var vFactor = (br[1] - tl[1]) / dim[1];
+           var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+           var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+           var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
+           return newZoom;
+         }
 
-                     if (_loaded[id] === undefined) {
-                       _loaded[id] = false;
-                       loadMore.push(id);
-                     }
-                   }
-                 } else if (entity.type === 'relation' && entity.isMultipolygon()) {
-                   for (i = 0; i < entity.members.length; i++) {
-                     id = entity.members[i].id;
+         map.extentZoom = function (val) {
+           return calcExtentZoom(geoExtent(val), _dimensions);
+         };
 
-                     if (_loaded[id] === undefined) {
-                       _loaded[id] = false;
-                       loadMore.push(id);
-                     }
-                   }
-                 }
-               });
-               _toLoadCount += result.data.length;
-               _toLoadTotal += loadMore.length;
-               dispatch$1.call('progressChanged', this, _toLoadCount, _toLoadTotal);
+         map.trimmedExtentZoom = function (val) {
+           var trimY = 120;
+           var trimX = 40;
+           var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
+           return calcExtentZoom(geoExtent(val), trimmed);
+         };
 
-               if (loadMore.length) {
-                 _toLoad.push.apply(_toLoad, loadMore);
+         map.withinEditableZoom = function () {
+           return map.zoom() >= context.minEditableZoom();
+         };
 
-                 osm.loadMultiple(loadMore, loaded);
-               }
+         map.isInWideSelection = function () {
+           return !map.withinEditableZoom() && context.selectedIDs().length;
+         };
 
-               if (!_toLoad.length) {
-                 detectConflicts();
-                 upload(changeset);
-               }
-             }
-           }
+         map.editableDataEnabled = function (skipZoomCheck) {
+           var layer = context.layers().layer('osm');
+           if (!layer || !layer.enabled()) return false;
+           return skipZoomCheck || map.withinEditableZoom();
+         };
 
-           function detectConflicts() {
-             function choice(id, text, _action) {
-               return {
-                 id: id,
-                 text: text,
-                 action: function action() {
-                   history.replace(_action);
-                 }
-               };
-             }
+         map.notesEditable = function () {
+           var layer = context.layers().layer('notes');
+           if (!layer || !layer.enabled()) return false;
+           return map.withinEditableZoom();
+         };
 
-             function formatUser(d) {
-               return '<a href="' + osm.userURL(d) + '" target="_blank">' + d + '</a>';
-             }
+         map.minzoom = function (val) {
+           if (!arguments.length) return _minzoom;
+           _minzoom = val;
+           return map;
+         };
 
-             function entityName(entity) {
-               return utilDisplayName(entity) || utilDisplayType(entity.id) + ' ' + entity.id;
-             }
+         map.toggleHighlightEdited = function () {
+           surface.classed('highlight-edited', !surface.classed('highlight-edited'));
+           map.pan([0, 0]); // trigger a redraw
 
-             function sameVersions(local, remote) {
-               if (local.version !== remote.version) return false;
+           dispatch.call('changeHighlighting', this);
+         };
 
-               if (local.type === 'way') {
-                 var children = utilArrayUnion(local.nodes, remote.nodes);
+         map.areaFillOptions = ['wireframe', 'partial', 'full'];
 
-                 for (var i = 0; i < children.length; i++) {
-                   var a = localGraph.hasEntity(children[i]);
-                   var b = remoteGraph.hasEntity(children[i]);
-                   if (a && b && a.version !== b.version) return false;
-                 }
-               }
+         map.activeAreaFill = function (val) {
+           if (!arguments.length) return corePreferences('area-fill') || 'partial';
+           corePreferences('area-fill', val);
 
-               return true;
-             }
+           if (val !== 'wireframe') {
+             corePreferences('area-fill-toggle', val);
+           }
 
-             _toCheck.forEach(function (id) {
-               var local = localGraph.entity(id);
-               var remote = remoteGraph.entity(id);
-               if (sameVersions(local, remote)) return;
-               var merge = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags, formatUser);
-               history.replace(merge);
-               var mergeConflicts = merge.conflicts();
-               if (!mergeConflicts.length) return; // merged safely
+           updateAreaFill();
+           map.pan([0, 0]); // trigger a redraw
 
-               var forceLocal = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_local');
-               var forceRemote = actionMergeRemoteChanges(id, localGraph, remoteGraph, _discardTags).withOption('force_remote');
-               var keepMine = _t('save.conflict.' + (remote.visible ? 'keep_local' : 'restore'));
-               var keepTheirs = _t('save.conflict.' + (remote.visible ? 'keep_remote' : 'delete'));
+           dispatch.call('changeAreaFill', this);
+           return map;
+         };
 
-               _conflicts.push({
-                 id: id,
-                 name: entityName(local),
-                 details: mergeConflicts,
-                 chosen: 1,
-                 choices: [choice(id, keepMine, forceLocal), choice(id, keepTheirs, forceRemote)]
-               });
-             });
+         map.toggleWireframe = function () {
+           var activeFill = map.activeAreaFill();
+
+           if (activeFill === 'wireframe') {
+             activeFill = corePreferences('area-fill-toggle') || 'partial';
+           } else {
+             activeFill = 'wireframe';
            }
+
+           map.activeAreaFill(activeFill);
+         };
+
+         function updateAreaFill() {
+           var activeFill = map.activeAreaFill();
+           map.areaFillOptions.forEach(function (opt) {
+             surface.classed('fill-' + opt, Boolean(opt === activeFill));
+           });
          }
 
-         function upload(changeset) {
-           var osm = context.connection();
+         map.layers = function () {
+           return drawLayers;
+         };
 
-           if (!osm) {
-             _errors.push({
-               msg: 'No OSM Service'
-             });
-           }
+         map.doubleUpHandler = function () {
+           return _doubleUpHandler;
+         };
 
-           if (_conflicts.length) {
-             didResultInConflicts(changeset);
-           } else if (_errors.length) {
-             didResultInErrors();
-           } else {
-             var history = context.history();
-             var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+         return utilRebind(map, dispatch, 'on');
+       }
 
-             if (changes.modified.length || changes.created.length || changes.deleted.length) {
-               dispatch$1.call('willAttemptUpload', this);
-               osm.putChangeset(changeset, changes, uploadCallback);
-             } else {
-               // changes were insignificant or reverted by user
-               didResultInNoChanges();
-             }
-           }
-         }
+       function rendererPhotos(context) {
+         var dispatch = dispatch$8('change');
+         var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'kartaview'];
+         var _allPhotoTypes = ['flat', 'panoramic'];
 
-         function uploadCallback(err, changeset) {
-           if (err) {
-             if (err.status === 409) {
-               // 409 Conflict
-               uploader.save(changeset, true, true); // tryAgain = true, checkConflicts = true
-             } else {
-               _errors.push({
-                 msg: err.message || err.responseText,
-                 details: [_t('save.status_code', {
-                   code: err.status
-                 })]
-               });
+         var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
 
-               didResultInErrors();
-             }
-           } else {
-             didResultInSuccess(changeset);
-           }
-         }
 
-         function didResultInNoChanges() {
-           dispatch$1.call('resultNoChanges', this);
-           endSave();
-           context.flush(); // reset iD
-         }
+         var _dateFilters = ['fromDate', 'toDate'];
 
-         function didResultInErrors() {
-           context.history().pop();
-           dispatch$1.call('resultErrors', this, _errors);
-           endSave();
-         }
+         var _fromDate;
 
-         function didResultInConflicts(changeset) {
-           _conflicts.sort(function (a, b) {
-             return b.id.localeCompare(a.id);
-           });
+         var _toDate;
 
-           dispatch$1.call('resultConflicts', this, changeset, _conflicts, _origChanges);
-           endSave();
-         }
+         var _usernames;
 
-         function didResultInSuccess(changeset) {
-           // delete the edit stack cached to local storage
-           context.history().clearSaved();
-           dispatch$1.call('resultSuccess', this, changeset); // Add delay to allow for postgres replication #1646 #2678
+         function photos() {}
+
+         function updateStorage() {
+           if (window.mocha) return;
+           var hash = utilStringQs(window.location.hash);
+           var enabled = context.layers().all().filter(function (d) {
+             return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
+           }).map(function (d) {
+             return d.id;
+           });
 
-           window.setTimeout(function () {
-             endSave();
-             context.flush(); // reset iD
-           }, 2500);
-         }
+           if (enabled.length) {
+             hash.photo_overlay = enabled.join(',');
+           } else {
+             delete hash.photo_overlay;
+           }
 
-         function endSave() {
-           _isSaving = false;
-           dispatch$1.call('saveEnded', this);
+           window.location.replace('#' + utilQsString(hash, true));
          }
 
-         uploader.cancelConflictResolution = function () {
-           context.history().pop();
+         photos.overlayLayerIDs = function () {
+           return _layerIDs;
          };
 
-         uploader.processResolvedConflicts = function (changeset) {
-           var history = context.history();
+         photos.allPhotoTypes = function () {
+           return _allPhotoTypes;
+         };
 
-           for (var i = 0; i < _conflicts.length; i++) {
-             if (_conflicts[i].chosen === 1) {
-               // user chose "use theirs"
-               var entity = context.hasEntity(_conflicts[i].id);
+         photos.dateFilters = function () {
+           return _dateFilters;
+         };
 
-               if (entity && entity.type === 'way') {
-                 var children = utilArrayUniq(entity.nodes);
+         photos.dateFilterValue = function (val) {
+           return val === _dateFilters[0] ? _fromDate : _toDate;
+         };
 
-                 for (var j = 0; j < children.length; j++) {
-                   history.replace(actionRevert(children[j]));
-                 }
-               }
+         photos.setDateFilter = function (type, val, updateUrl) {
+           // validate the date
+           var date = val && new Date(val);
 
-               history.replace(actionRevert(_conflicts[i].id));
-             }
+           if (date && !isNaN(date)) {
+             val = date.toISOString().substr(0, 10);
+           } else {
+             val = null;
            }
 
-           uploader.save(changeset, true, false); // tryAgain = true, checkConflicts = false
-         };
-
-         uploader.reset = function () {};
+           if (type === _dateFilters[0]) {
+             _fromDate = val;
 
-         return uploader;
-       }
+             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+               _toDate = _fromDate;
+             }
+           }
 
-       var abs$4 = Math.abs;
-       var exp$2 = Math.exp;
-       var E = Math.E;
+           if (type === _dateFilters[1]) {
+             _toDate = val;
 
-       var FORCED$g = fails(function () {
-         return Math.sinh(-2e-17) != -2e-17;
-       });
+             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
+               _fromDate = _toDate;
+             }
+           }
 
-       // `Math.sinh` method
-       // https://tc39.github.io/ecma262/#sec-math.sinh
-       // V8 near Chromium 38 has a problem with very small numbers
-       _export({ target: 'Math', stat: true, forced: FORCED$g }, {
-         sinh: function sinh(x) {
-           return abs$4(x = +x) < 1 ? (mathExpm1(x) - mathExpm1(-x)) / 2 : (exp$2(x - 1) - exp$2(-x - 1)) * (E / 2);
-         }
-       });
+           dispatch.call('change', this);
 
-       var isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2; // listen for DPI change, e.g. when dragging a browser window from a retina to non-retina screen
+           if (updateUrl) {
+             var rangeString;
 
-       window.matchMedia("\n        (-webkit-min-device-pixel-ratio: 2), /* Safari */\n        (min-resolution: 2dppx),             /* standard */\n        (min-resolution: 192dpi)             /* fallback */\n    ").addListener(function () {
-         isRetina = window.devicePixelRatio && window.devicePixelRatio >= 2;
-       });
+             if (_fromDate || _toDate) {
+               rangeString = (_fromDate || '') + '_' + (_toDate || '');
+             }
 
-       function localeDateString(s) {
-         if (!s) return null;
-         var options = {
-           day: 'numeric',
-           month: 'short',
-           year: 'numeric'
+             setUrlFilterValue('photo_dates', rangeString);
+           }
          };
-         var d = new Date(s);
-         if (isNaN(d.getTime())) return null;
-         return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
-       }
 
-       function vintageRange(vintage) {
-         var s;
+         photos.setUsernameFilter = function (val, updateUrl) {
+           if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
 
-         if (vintage.start || vintage.end) {
-           s = vintage.start || '?';
+           if (val) {
+             val = val.map(function (d) {
+               return d.trim();
+             }).filter(Boolean);
 
-           if (vintage.start !== vintage.end) {
-             s += ' - ' + (vintage.end || '?');
+             if (!val.length) {
+               val = null;
+             }
            }
-         }
 
-         return s;
-       }
+           _usernames = val;
+           dispatch.call('change', this);
 
-       function rendererBackgroundSource(data) {
-         var source = Object.assign({}, data); // shallow copy
+           if (updateUrl) {
+             var hashString;
 
-         var _offset = [0, 0];
-         var _name = source.name;
-         var _description = source.description;
+             if (_usernames) {
+               hashString = _usernames.join(',');
+             }
 
-         var _best = !!source.best;
+             setUrlFilterValue('photo_username', hashString);
+           }
+         };
 
-         var _template = source.encrypted ? utilAesDecrypt(source.template) : source.template;
+         function setUrlFilterValue(property, val) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
 
-         source.tileSize = data.tileSize || 256;
-         source.zoomExtent = data.zoomExtent || [0, 22];
-         source.overzoom = data.overzoom !== false;
+             if (val) {
+               if (hash[property] === val) return;
+               hash[property] = val;
+             } else {
+               if (!(property in hash)) return;
+               delete hash[property];
+             }
 
-         source.offset = function (val) {
-           if (!arguments.length) return _offset;
-           _offset = val;
-           return source;
-         };
+             window.location.replace('#' + utilQsString(hash, true));
+           }
+         }
 
-         source.nudge = function (val, zoomlevel) {
-           _offset[0] += val[0] / Math.pow(2, zoomlevel);
-           _offset[1] += val[1] / Math.pow(2, zoomlevel);
-           return source;
+         function showsLayer(id) {
+           var layer = context.layers().layer(id);
+           return layer && layer.supported() && layer.enabled();
+         }
+
+         photos.shouldFilterByDate = function () {
+           return showsLayer('mapillary') || showsLayer('kartaview') || showsLayer('streetside');
          };
 
-         source.name = function () {
-           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-           return _t('imagery.' + id_safe + '.name', {
-             "default": _name
-           });
+         photos.shouldFilterByPhotoType = function () {
+           return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('kartaview');
          };
 
-         source.label = function () {
-           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-           return _t.html('imagery.' + id_safe + '.name', {
-             "default": _name
-           });
+         photos.shouldFilterByUsername = function () {
+           return !showsLayer('mapillary') && showsLayer('kartaview') && !showsLayer('streetside');
          };
 
-         source.description = function () {
-           var id_safe = source.id.replace(/\./g, '<TX_DOT>');
-           return _t.html('imagery.' + id_safe + '.description', {
-             "default": _description
-           });
+         photos.showsPhotoType = function (val) {
+           if (!photos.shouldFilterByPhotoType()) return true;
+           return _shownPhotoTypes.indexOf(val) !== -1;
          };
 
-         source.best = function () {
-           return _best;
+         photos.showsFlat = function () {
+           return photos.showsPhotoType('flat');
          };
 
-         source.area = function () {
-           if (!data.polygon) return Number.MAX_VALUE; // worldwide
+         photos.showsPanoramic = function () {
+           return photos.showsPhotoType('panoramic');
+         };
 
-           var area = d3_geoArea({
-             type: 'MultiPolygon',
-             coordinates: [data.polygon]
-           });
-           return isNaN(area) ? 0 : area;
+         photos.fromDate = function () {
+           return _fromDate;
          };
 
-         source.imageryUsed = function () {
-           return _name || source.id;
+         photos.toDate = function () {
+           return _toDate;
          };
 
-         source.template = function (val) {
-           if (!arguments.length) return _template;
+         photos.togglePhotoType = function (val) {
+           var index = _shownPhotoTypes.indexOf(val);
 
-           if (source.id === 'custom') {
-             _template = val;
+           if (index !== -1) {
+             _shownPhotoTypes.splice(index, 1);
+           } else {
+             _shownPhotoTypes.push(val);
            }
 
-           return source;
+           dispatch.call('change', this);
+           return photos;
          };
 
-         source.url = function (coord) {
-           var result = _template;
-           if (result === '') return result; // source 'none'
-           // Guess a type based on the tokens present in the template
-           // (This is for 'custom' source, where we don't know)
+         photos.usernames = function () {
+           return _usernames;
+         };
 
-           if (!source.type) {
-             if (/SERVICE=WMS|\{(proj|wkid|bbox)\}/.test(_template)) {
-               source.type = 'wms';
-               source.projection = 'EPSG:3857'; // guess
-             } else if (/\{(x|y)\}/.test(_template)) {
-               source.type = 'tms';
-             } else if (/\{u\}/.test(_template)) {
-               source.type = 'bing';
-             }
-           }
+         photos.init = function () {
+           var hash = utilStringQs(window.location.hash);
 
-           if (source.type === 'wms') {
-             var tileToProjectedCoords = function tileToProjectedCoords(x, y, z) {
-               //polyfill for IE11, PhantomJS
-               var sinh = Math.sinh || function (x) {
-                 var y = Math.exp(x);
-                 return (y - 1 / y) / 2;
-               };
+           if (hash.photo_dates) {
+             // expect format like `photo_dates=2019-01-01_2020-12-31`, but allow a couple different separators
+             var parts = /^(.*)[–_](.*)$/g.exec(hash.photo_dates.trim());
+             this.setDateFilter('fromDate', parts && parts.length >= 2 && parts[1], false);
+             this.setDateFilter('toDate', parts && parts.length >= 3 && parts[2], false);
+           }
 
-               var zoomSize = Math.pow(2, z);
-               var lon = x / zoomSize * Math.PI * 2 - Math.PI;
-               var lat = Math.atan(sinh(Math.PI * (1 - 2 * y / zoomSize)));
+           if (hash.photo_username) {
+             this.setUsernameFilter(hash.photo_username, false);
+           }
 
-               switch (source.projection) {
-                 case 'EPSG:4326':
-                   return {
-                     x: lon * 180 / Math.PI,
-                     y: lat * 180 / Math.PI
-                   };
+           if (hash.photo_overlay) {
+             // support enabling photo layers by default via a URL parameter, e.g. `photo_overlay=kartaview;mapillary;streetside`
+             var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
+             hashOverlayIDs.forEach(function (id) {
+               if (id === 'openstreetcam') id = 'kartaview'; // legacy alias
 
-                 default:
-                   // EPSG:3857 and synonyms
-                   var mercCoords = mercatorRaw(lon, lat);
-                   return {
-                     x: 20037508.34 / Math.PI * mercCoords[0],
-                     y: 20037508.34 / Math.PI * mercCoords[1]
-                   };
-               }
-             };
+               var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
+               if (layer && !layer.enabled()) layer.enabled(true);
+             });
+           }
 
-             var tileSize = source.tileSize;
-             var projection = source.projection;
-             var minXmaxY = tileToProjectedCoords(coord[0], coord[1], coord[2]);
-             var maxXminY = tileToProjectedCoords(coord[0] + 1, coord[1] + 1, coord[2]);
-             result = result.replace(/\{(\w+)\}/g, function (token, key) {
-               switch (key) {
-                 case 'width':
-                 case 'height':
-                   return tileSize;
+           if (hash.photo) {
+             // support opening a photo via a URL parameter, e.g. `photo=mapillary-fztgSDtLpa08ohPZFZjeRQ`
+             var photoIds = hash.photo.replace(/;/g, ',').split(',');
+             var photoId = photoIds.length && photoIds[0].trim();
+             var results = /(.*)\/(.*)/g.exec(photoId);
 
-                 case 'proj':
-                   return projection;
+             if (results && results.length >= 3) {
+               var serviceId = results[1];
+               if (serviceId === 'openstreetcam') serviceId = 'kartaview'; // legacy alias
 
-                 case 'wkid':
-                   return projection.replace(/^EPSG:/, '');
+               var photoKey = results[2];
+               var service = services[serviceId];
 
-                 case 'bbox':
-                   // WMS 1.3 flips x/y for some coordinate systems including EPSG:4326 - #7557
-                   if (projection === 'EPSG:4326' && // The CRS parameter implies version 1.3 (prior versions use SRS)
-                   /VERSION=1.3|CRS={proj}/.test(source.template())) {
-                     return maxXminY.y + ',' + minXmaxY.x + ',' + minXmaxY.y + ',' + maxXminY.x;
-                   } else {
-                     return minXmaxY.x + ',' + maxXminY.y + ',' + maxXminY.x + ',' + minXmaxY.y;
+               if (service && service.ensureViewerLoaded) {
+                 // if we're showing a photo then make sure its layer is enabled too
+                 var layer = _layerIDs.indexOf(serviceId) !== -1 && context.layers().layer(serviceId);
+                 if (layer && !layer.enabled()) layer.enabled(true);
+                 var baselineTime = Date.now();
+                 service.on('loadedImages.rendererPhotos', function () {
+                   // don't open the viewer if too much time has elapsed
+                   if (Date.now() - baselineTime > 45000) {
+                     service.on('loadedImages.rendererPhotos', null);
+                     return;
                    }
 
-                 case 'w':
-                   return minXmaxY.x;
-
-                 case 's':
-                   return maxXminY.y;
-
-                 case 'n':
-                   return maxXminY.x;
-
-                 case 'e':
-                   return minXmaxY.y;
-
-                 default:
-                   return token;
-               }
-             });
-           } else if (source.type === 'tms') {
-             result = result.replace('{x}', coord[0]).replace('{y}', coord[1]) // TMS-flipped y coordinate
-             .replace(/\{[t-]y\}/, Math.pow(2, coord[2]) - coord[1] - 1).replace(/\{z(oom)?\}/, coord[2]) // only fetch retina tiles for retina screens
-             .replace(/\{@2x\}|\{r\}/, isRetina ? '@2x' : '');
-           } else if (source.type === 'bing') {
-             result = result.replace('{u}', function () {
-               var u = '';
-
-               for (var zoom = coord[2]; zoom > 0; zoom--) {
-                 var b = 0;
-                 var mask = 1 << zoom - 1;
-                 if ((coord[0] & mask) !== 0) b++;
-                 if ((coord[1] & mask) !== 0) b += 2;
-                 u += b.toString();
+                   if (!service.cachedImage(photoKey)) return;
+                   service.on('loadedImages.rendererPhotos', null);
+                   service.ensureViewerLoaded(context).then(function () {
+                     service.selectImage(context, photoKey).showViewer(context);
+                   });
+                 });
                }
+             }
+           }
 
-               return u;
-             });
-           } // these apply to any type..
-
-
-           result = result.replace(/\{switch:([^}]+)\}/, function (s, r) {
-             var subdomains = r.split(',');
-             return subdomains[(coord[0] + coord[1]) % subdomains.length];
-           });
-           return result;
-         };
-
-         source.validZoom = function (z) {
-           return source.zoomExtent[0] <= z && (source.overzoom || source.zoomExtent[1] > z);
-         };
-
-         source.isLocatorOverlay = function () {
-           return source.id === 'mapbox_locator_overlay';
+           context.layers().on('change.rendererPhotos', updateStorage);
          };
-         /* hides a source from the list, but leaves it available for use */
 
+         return utilRebind(photos, dispatch, 'on');
+       }
 
-         source.isHidden = function () {
-           return source.id === 'DigitalGlobe-Premium-vintage' || source.id === 'DigitalGlobe-Standard-vintage';
-         };
+       function uiAccount(context) {
+         var osm = context.connection();
 
-         source.copyrightNotices = function () {};
+         function update(selection) {
+           if (!osm) return;
 
-         source.getMetadata = function (center, tileCoord, callback) {
-           var vintage = {
-             start: localeDateString(source.startDate),
-             end: localeDateString(source.endDate)
-           };
-           vintage.range = vintageRange(vintage);
-           var metadata = {
-             vintage: vintage
-           };
-           callback(null, metadata);
-         };
+           if (!osm.authenticated()) {
+             selection.selectAll('.userLink, .logoutLink').classed('hide', true);
+             return;
+           }
 
-         return source;
-       }
+           osm.userDetails(function (err, details) {
+             var userLink = selection.select('.userLink'),
+                 logoutLink = selection.select('.logoutLink');
+             userLink.html('');
+             logoutLink.html('');
+             if (err || !details) return;
+             selection.selectAll('.userLink, .logoutLink').classed('hide', false); // Link
 
-       rendererBackgroundSource.Bing = function (data, dispatch) {
-         // http://msdn.microsoft.com/en-us/library/ff701716.aspx
-         // http://msdn.microsoft.com/en-us/library/ff701701.aspx
-         data.template = 'https://ecn.t{switch:0,1,2,3}.tiles.virtualearth.net/tiles/a{u}.jpeg?g=587&mkt=en-gb&n=z';
-         var bing = rendererBackgroundSource(data); // var key = 'Arzdiw4nlOJzRwOz__qailc8NiR31Tt51dN2D7cm57NrnceZnCpgOkmJhNpGoppU'; // P2, JOSM, etc
+             var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
 
-         var key = 'Ak5oTE46TUbjRp08OFVcGpkARErDobfpuyNKa-W2mQ8wbt1K1KL8p1bIRwWwcF-Q'; // iD
+             if (details.image_url) {
+               userLinkA.append('img').attr('class', 'icon pre-text user-icon').attr('src', details.image_url);
+             } else {
+               userLinkA.call(svgIcon('#iD-icon-avatar', 'pre-text light'));
+             } // Add user name
 
-         var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial?include=ImageryProviders&key=' + key;
-         var cache = {};
-         var inflight = {};
-         var providers = [];
-         d3_json(url).then(function (json) {
-           providers = json.resourceSets[0].resources[0].imageryProviders.map(function (provider) {
-             return {
-               attribution: provider.attribution,
-               areas: provider.coverageAreas.map(function (area) {
-                 return {
-                   zoom: [area.zoomMin, area.zoomMax],
-                   extent: geoExtent([area.bbox[1], area.bbox[0]], [area.bbox[3], area.bbox[2]])
-                 };
-               })
-             };
-           });
-           dispatch.call('change');
-         })["catch"](function () {
-           /* ignore */
-         });
 
-         bing.copyrightNotices = function (zoom, extent) {
-           zoom = Math.min(zoom, 21);
-           return providers.filter(function (provider) {
-             return provider.areas.some(function (area) {
-               return extent.intersects(area.extent) && area.zoom[0] <= zoom && area.zoom[1] >= zoom;
+             userLinkA.append('span').attr('class', 'label').html(details.display_name);
+             logoutLink.append('a').attr('class', 'logout').attr('href', '#').call(_t.append('logout')).on('click.logout', function (d3_event) {
+               d3_event.preventDefault();
+               osm.logout();
              });
-           }).map(function (provider) {
-             return provider.attribution;
-           }).join(', ');
-         };
-
-         bing.getMetadata = function (center, tileCoord, callback) {
-           var tileID = tileCoord.slice(0, 3).join('/');
-           var zoom = Math.min(tileCoord[2], 21);
-           var centerPoint = center[1] + ',' + center[0]; // lat,lng
-
-           var url = 'https://dev.virtualearth.net/REST/v1/Imagery/Metadata/Aerial/' + centerPoint + '?zl=' + zoom + '&key=' + key;
-           if (inflight[tileID]) return;
+           });
+         }
 
-           if (!cache[tileID]) {
-             cache[tileID] = {};
-           }
+         return function (selection) {
+           selection.append('li').attr('class', 'userLink').classed('hide', true);
+           selection.append('li').attr('class', 'logoutLink').classed('hide', true);
 
-           if (cache[tileID] && cache[tileID].metadata) {
-             return callback(null, cache[tileID].metadata);
+           if (osm) {
+             osm.on('change.account', function () {
+               update(selection);
+             });
+             update(selection);
            }
+         };
+       }
 
-           inflight[tileID] = true;
-           d3_json(url).then(function (result) {
-             delete inflight[tileID];
-
-             if (!result) {
-               throw new Error('Unknown Error');
-             }
+       function uiAttribution(context) {
+         var _selection = select(null);
 
-             var vintage = {
-               start: localeDateString(result.resourceSets[0].resources[0].vintageStart),
-               end: localeDateString(result.resourceSets[0].resources[0].vintageEnd)
-             };
-             vintage.range = vintageRange(vintage);
-             var metadata = {
-               vintage: vintage
-             };
-             cache[tileID].metadata = metadata;
-             if (callback) callback(null, metadata);
-           })["catch"](function (err) {
-             delete inflight[tileID];
-             if (callback) callback(err.message);
+         function render(selection, data, klass) {
+           var div = selection.selectAll(".".concat(klass)).data([0]);
+           div = div.enter().append('div').attr('class', klass).merge(div);
+           var attributions = div.selectAll('.attribution').data(data, function (d) {
+             return d.id;
            });
-         };
+           attributions.exit().remove();
+           attributions = attributions.enter().append('span').attr('class', 'attribution').each(function (d, i, nodes) {
+             var attribution = select(nodes[i]);
 
-         bing.terms_url = 'https://blog.openstreetmap.org/2010/11/30/microsoft-imagery-details';
-         return bing;
-       };
+             if (d.terms_html) {
+               attribution.html(d.terms_html);
+               return;
+             }
 
-       rendererBackgroundSource.Esri = function (data) {
-         // in addition to using the tilemap at zoom level 20, overzoom real tiles - #4327 (deprecated technique, but it works)
-         if (data.template.match(/blankTile/) === null) {
-           data.template = data.template + '?blankTile=false';
-         }
+             if (d.terms_url) {
+               attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+             }
 
-         var esri = rendererBackgroundSource(data);
-         var cache = {};
-         var inflight = {};
+             var sourceID = d.id.replace(/\./g, '<TX_DOT>');
+             var terms_text = _t("imagery.".concat(sourceID, ".attribution.text"), {
+               "default": d.terms_text || d.id || d.name()
+             });
 
-         var _prevCenter; // use a tilemap service to set maximum zoom for esri tiles dynamically
-         // https://developers.arcgis.com/documentation/tiled-elevation-service/
+             if (d.icon && !d.overlay) {
+               attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
+             }
 
+             attribution.append('span').attr('class', 'attribution-text').text(terms_text);
+           }).merge(attributions);
+           var copyright = attributions.selectAll('.copyright-notice').data(function (d) {
+             var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
+             return notice ? [notice] : [];
+           });
+           copyright.exit().remove();
+           copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
+           copyright.text(String);
+         }
 
-         esri.fetchTilemap = function (center) {
-           // skip if we have already fetched a tilemap within 5km
-           if (_prevCenter && geoSphericalDistance(center, _prevCenter) < 5000) return;
-           _prevCenter = center; // tiles are available globally to zoom level 19, afterward they may or may not be present
+         function update() {
+           var baselayer = context.background().baseLayerSource();
 
-           var z = 20; // first generate a random url using the template
+           _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
 
-           var dummyUrl = esri.url([1, 2, 3]); // calculate url z/y/x from the lat/long of the center of the map
+           var z = context.map().zoom();
+           var overlays = context.background().overlayLayerSources() || [];
 
-           var x = Math.floor((center[0] + 180) / 360 * Math.pow(2, z));
-           var y = Math.floor((1 - Math.log(Math.tan(center[1] * Math.PI / 180) + 1 / Math.cos(center[1] * Math.PI / 180)) / Math.PI) / 2 * Math.pow(2, z)); // fetch an 8x8 grid to leverage cache
+           _selection.call(render, overlays.filter(function (s) {
+             return s.validZoom(z);
+           }), 'overlay-layer-attribution');
+         }
 
-           var tilemapUrl = dummyUrl.replace(/tile\/[0-9]+\/[0-9]+\/[0-9]+\?blankTile=false/, 'tilemap') + '/' + z + '/' + y + '/' + x + '/8/8'; // make the request and introspect the response from the tilemap server
+         return function (selection) {
+           _selection = selection;
+           context.background().on('change.attribution', update);
+           context.map().on('move.attribution', throttle(update, 400, {
+             leading: false
+           }));
+           update();
+         };
+       }
 
-           d3_json(tilemapUrl).then(function (tilemap) {
-             if (!tilemap) {
-               throw new Error('Unknown Error');
-             }
+       function uiContributors(context) {
+         var osm = context.connection(),
+             debouncedUpdate = debounce(function () {
+           update();
+         }, 1000),
+             limit = 4,
+             hidden = false,
+             wrap = select(null);
 
-             var hasTiles = true;
+         function update() {
+           if (!osm) return;
+           var users = {},
+               entities = context.history().intersects(context.map().extent());
+           entities.forEach(function (entity) {
+             if (entity && entity.user) users[entity.user] = true;
+           });
+           var u = Object.keys(users),
+               subset = u.slice(0, u.length > limit ? limit - 1 : limit);
+           wrap.html('').call(svgIcon('#iD-icon-nearby', 'pre-text light'));
+           var userList = select(document.createElement('span'));
+           userList.selectAll().data(subset).enter().append('a').attr('class', 'user-link').attr('href', function (d) {
+             return osm.userURL(d);
+           }).attr('target', '_blank').text(String);
 
-             for (var i = 0; i < tilemap.data.length; i++) {
-               // 0 means an individual tile in the grid doesn't exist
-               if (!tilemap.data[i]) {
-                 hasTiles = false;
-                 break;
+           if (u.length > limit) {
+             var count = select(document.createElement('span'));
+             var othersNum = u.length - limit + 1;
+             count.append('a').attr('target', '_blank').attr('href', function () {
+               return osm.changesetsURL(context.map().center(), context.map().zoom());
+             }).text(othersNum);
+             wrap.append('span').html(_t.html('contributors.truncated_list', {
+               n: othersNum,
+               users: {
+                 html: userList.html()
+               },
+               count: {
+                 html: count.html()
                }
-             } // if any tiles are missing at level 20 we restrict maxZoom to 19
+             }));
+           } else {
+             wrap.append('span').html(_t.html('contributors.list', {
+               users: {
+                 html: userList.html()
+               }
+             }));
+           }
 
+           if (!u.length) {
+             hidden = true;
+             wrap.transition().style('opacity', 0);
+           } else if (hidden) {
+             wrap.transition().style('opacity', 1);
+           }
+         }
 
-             esri.zoomExtent[1] = hasTiles ? 22 : 19;
-           })["catch"](function () {
-             /* ignore */
-           });
+         return function (selection) {
+           if (!osm) return;
+           wrap = selection;
+           update();
+           osm.on('loaded.contributors', debouncedUpdate);
+           context.map().on('move.contributors', debouncedUpdate);
          };
+       }
 
-         esri.getMetadata = function (center, tileCoord, callback) {
-           var tileID = tileCoord.slice(0, 3).join('/');
-           var zoom = Math.min(tileCoord[2], esri.zoomExtent[1]);
-           var centerPoint = center[0] + ',' + center[1]; // long, lat (as it should be)
+       var _popoverID = 0;
+       function uiPopover(klass) {
+         var _id = _popoverID++;
 
-           var unknown = _t('info_panels.background.unknown');
-           var metadataLayer;
-           var vintage = {};
-           var metadata = {};
-           if (inflight[tileID]) return;
+         var _anchorSelection = select(null);
 
-           switch (true) {
-             case zoom >= 20 && esri.id === 'EsriWorldImageryClarity':
-               metadataLayer = 4;
-               break;
+         var popover = function popover(selection) {
+           _anchorSelection = selection;
+           selection.each(setup);
+         };
 
-             case zoom >= 19:
-               metadataLayer = 3;
-               break;
+         var _animation = utilFunctor(false);
 
-             case zoom >= 17:
-               metadataLayer = 2;
-               break;
+         var _placement = utilFunctor('top'); // top, bottom, left, right
 
-             case zoom >= 13:
-               metadataLayer = 0;
-               break;
 
-             default:
-               metadataLayer = 99;
-           }
+         var _alignment = utilFunctor('center'); // leading, center, trailing
 
-           var url; // build up query using the layer appropriate to the current zoom
 
-           if (esri.id === 'EsriWorldImagery') {
-             url = 'https://services.arcgisonline.com/arcgis/rest/services/World_Imagery/MapServer/';
-           } else if (esri.id === 'EsriWorldImageryClarity') {
-             url = 'https://serviceslab.arcgisonline.com/arcgis/rest/services/Clarity_World_Imagery/MapServer/';
-           }
+         var _scrollContainer = utilFunctor(select(null));
 
-           url += metadataLayer + '/query?returnGeometry=false&geometry=' + centerPoint + '&inSR=4326&geometryType=esriGeometryPoint&outFields=*&f=json';
+         var _content;
 
-           if (!cache[tileID]) {
-             cache[tileID] = {};
-           }
+         var _displayType = utilFunctor('');
 
-           if (cache[tileID] && cache[tileID].metadata) {
-             return callback(null, cache[tileID].metadata);
-           } // accurate metadata is only available >= 13
+         var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
 
 
-           if (metadataLayer === 99) {
-             vintage = {
-               start: null,
-               end: null,
-               range: null
-             };
-             metadata = {
-               vintage: null,
-               source: unknown,
-               description: unknown,
-               resolution: unknown,
-               accuracy: unknown
-             };
-             callback(null, metadata);
-           } else {
-             inflight[tileID] = true;
-             d3_json(url).then(function (result) {
-               delete inflight[tileID];
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-               if (!result) {
-                 throw new Error('Unknown Error');
-               } else if (result.features && result.features.length < 1) {
-                 throw new Error('No Results');
-               } else if (result.error && result.error.message) {
-                 throw new Error(result.error.message);
-               } // pass through the discrete capture date from metadata
-
-
-               var captureDate = localeDateString(result.features[0].attributes.SRC_DATE2);
-               vintage = {
-                 start: captureDate,
-                 end: captureDate,
-                 range: captureDate
-               };
-               metadata = {
-                 vintage: vintage,
-                 source: clean(result.features[0].attributes.NICE_NAME),
-                 description: clean(result.features[0].attributes.NICE_DESC),
-                 resolution: clean(+parseFloat(result.features[0].attributes.SRC_RES).toFixed(4)),
-                 accuracy: clean(+parseFloat(result.features[0].attributes.SRC_ACC).toFixed(4))
-               }; // append units - meters
+         popover.displayType = function (val) {
+           if (arguments.length) {
+             _displayType = utilFunctor(val);
+             return popover;
+           } else {
+             return _displayType;
+           }
+         };
 
-               if (isFinite(metadata.resolution)) {
-                 metadata.resolution += ' m';
-               }
+         popover.hasArrow = function (val) {
+           if (arguments.length) {
+             _hasArrow = utilFunctor(val);
+             return popover;
+           } else {
+             return _hasArrow;
+           }
+         };
 
-               if (isFinite(metadata.accuracy)) {
-                 metadata.accuracy += ' m';
-               }
+         popover.placement = function (val) {
+           if (arguments.length) {
+             _placement = utilFunctor(val);
+             return popover;
+           } else {
+             return _placement;
+           }
+         };
 
-               cache[tileID].metadata = metadata;
-               if (callback) callback(null, metadata);
-             })["catch"](function (err) {
-               delete inflight[tileID];
-               if (callback) callback(err.message);
-             });
+         popover.alignment = function (val) {
+           if (arguments.length) {
+             _alignment = utilFunctor(val);
+             return popover;
+           } else {
+             return _alignment;
            }
+         };
 
-           function clean(val) {
-             return String(val).trim() || unknown;
+         popover.scrollContainer = function (val) {
+           if (arguments.length) {
+             _scrollContainer = utilFunctor(val);
+             return popover;
+           } else {
+             return _scrollContainer;
            }
          };
 
-         return esri;
-       };
+         popover.content = function (val) {
+           if (arguments.length) {
+             _content = val;
+             return popover;
+           } else {
+             return _content;
+           }
+         };
 
-       rendererBackgroundSource.None = function () {
-         var source = rendererBackgroundSource({
-           id: 'none',
-           template: ''
-         });
+         popover.isShown = function () {
+           var popoverSelection = _anchorSelection.select('.popover-' + _id);
 
-         source.name = function () {
-           return _t('background.none');
+           return !popoverSelection.empty() && popoverSelection.classed('in');
          };
 
-         source.label = function () {
-           return _t.html('background.none');
+         popover.show = function () {
+           _anchorSelection.each(show);
          };
 
-         source.imageryUsed = function () {
-           return null;
+         popover.updateContent = function () {
+           _anchorSelection.each(updateContent);
          };
 
-         source.area = function () {
-           return -1; // sources in background pane are sorted by area
+         popover.hide = function () {
+           _anchorSelection.each(hide);
          };
 
-         return source;
-       };
-
-       rendererBackgroundSource.Custom = function (template) {
-         var source = rendererBackgroundSource({
-           id: 'custom',
-           template: template
-         });
+         popover.toggle = function () {
+           _anchorSelection.each(toggle);
+         };
 
-         source.name = function () {
-           return _t('background.custom');
+         popover.destroy = function (selection, selector) {
+           // by default, just destroy the current popover
+           selector = selector || '.popover-' + _id;
+           selection.on(_pointerPrefix + 'enter.popover', null).on(_pointerPrefix + 'leave.popover', null).on(_pointerPrefix + 'up.popover', null).on(_pointerPrefix + 'down.popover', null).on('click.popover', null).attr('title', function () {
+             return this.getAttribute('data-original-title') || this.getAttribute('title');
+           }).attr('data-original-title', null).selectAll(selector).remove();
          };
 
-         source.label = function () {
-           return _t.html('background.custom');
+         popover.destroyAny = function (selection) {
+           selection.call(popover.destroy, '.popover');
          };
 
-         source.imageryUsed = function () {
-           // sanitize personal connection tokens - #6801
-           var cleaned = source.template(); // from query string parameters
+         function setup() {
+           var anchor = select(this);
 
-           if (cleaned.indexOf('?') !== -1) {
-             var parts = cleaned.split('?', 2);
-             var qs = utilStringQs(parts[1]);
-             ['access_token', 'connectId', 'token'].forEach(function (param) {
-               if (qs[param]) {
-                 qs[param] = '{apikey}';
-               }
-             });
-             cleaned = parts[0] + '?' + utilQsString(qs, true); // true = soft encode
-           } // from wms/wmts api path parameters
+           var animate = _animation.apply(this, arguments);
 
+           var popoverSelection = anchor.selectAll('.popover-' + _id).data([0]);
+           var enter = popoverSelection.enter().append('div').attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : '')).classed('arrowed', _hasArrow.apply(this, arguments));
+           enter.append('div').attr('class', 'popover-arrow');
+           enter.append('div').attr('class', 'popover-inner');
+           popoverSelection = enter.merge(popoverSelection);
 
-           cleaned = cleaned.replace(/token\/(\w+)/, 'token/{apikey}');
-           return 'Custom (' + cleaned + ' )';
-         };
+           if (animate) {
+             popoverSelection.classed('fade', true);
+           }
 
-         source.area = function () {
-           return -2; // sources in background pane are sorted by area
-         };
+           var display = _displayType.apply(this, arguments);
 
-         return source;
-       };
+           if (display === 'hover') {
+             var _lastNonMouseEnterTime;
 
-       function rendererTileLayer(context) {
-         var transformProp = utilPrefixCSSProperty('Transform');
-         var tiler = utilTiler();
-         var _tileSize = 256;
+             anchor.on(_pointerPrefix + 'enter.popover', function (d3_event) {
+               if (d3_event.pointerType) {
+                 if (d3_event.pointerType !== 'mouse') {
+                   _lastNonMouseEnterTime = d3_event.timeStamp; // only allow hover behavior for mouse input
 
-         var _projection;
+                   return;
+                 } else if (_lastNonMouseEnterTime && d3_event.timeStamp - _lastNonMouseEnterTime < 1500) {
+                   // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
+                   // event for non-mouse interactions right after sending
+                   // the correct type pointerenter event. Workaround by discarding
+                   // any mouse event that occurs immediately after a non-mouse event.
+                   return;
+                 }
+               } // don't show if buttons are pressed, e.g. during click and drag of map
 
-         var _cache = {};
 
-         var _tileOrigin;
+               if (d3_event.buttons !== 0) return;
+               show.apply(this, arguments);
+             }).on(_pointerPrefix + 'leave.popover', function () {
+               hide.apply(this, arguments);
+             }) // show on focus too for better keyboard navigation support
+             .on('focus.popover', function () {
+               show.apply(this, arguments);
+             }).on('blur.popover', function () {
+               hide.apply(this, arguments);
+             });
+           } else if (display === 'clickFocus') {
+             anchor.on(_pointerPrefix + 'down.popover', function (d3_event) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+             }).on(_pointerPrefix + 'up.popover', function (d3_event) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+             }).on('click.popover', toggle);
+             popoverSelection // This attribute lets the popover take focus
+             .attr('tabindex', 0).on('blur.popover', function () {
+               anchor.each(function () {
+                 hide.apply(this, arguments);
+               });
+             });
+           }
+         }
 
-         var _zoom;
+         function show() {
+           var anchor = select(this);
+           var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-         var _source;
+           if (popoverSelection.empty()) {
+             // popover was removed somehow, put it back
+             anchor.call(popover.destroy);
+             anchor.each(setup);
+             popoverSelection = anchor.selectAll('.popover-' + _id);
+           }
 
-         function tileSizeAtZoom(d, z) {
-           var EPSILON = 0.002; // close seams
+           popoverSelection.classed('in', true);
 
-           return _tileSize * Math.pow(2, z - d[2]) / _tileSize + EPSILON;
-         }
+           var displayType = _displayType.apply(this, arguments);
 
-         function atZoom(t, distance) {
-           var power = Math.pow(2, distance);
-           return [Math.floor(t[0] * power), Math.floor(t[1] * power), t[2] + distance];
+           if (displayType === 'clickFocus') {
+             anchor.classed('active', true);
+             popoverSelection.node().focus();
+           }
+
+           anchor.each(updateContent);
          }
 
-         function lookUp(d) {
-           for (var up = -1; up > -d[2]; up--) {
-             var tile = atZoom(d, up);
+         function updateContent() {
+           var anchor = select(this);
 
-             if (_cache[_source.url(tile)] !== false) {
-               return tile;
-             }
+           if (_content) {
+             anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
            }
+
+           updatePosition.apply(this, arguments); // hack: update multiple times to fix instances where the absolute offset is
+           // set before the dynamic popover size is calculated by the browser
+
+           updatePosition.apply(this, arguments);
+           updatePosition.apply(this, arguments);
          }
 
-         function uniqueBy(a, n) {
-           var o = [];
-           var seen = {};
+         function updatePosition() {
+           var anchor = select(this);
+           var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-           for (var i = 0; i < a.length; i++) {
-             if (seen[a[i][n]] === undefined) {
-               o.push(a[i]);
-               seen[a[i][n]] = true;
-             }
-           }
+           var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
 
-           return o;
-         }
+           var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
+           var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
+           var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
 
-         function addSource(d) {
-           d.push(_source.url(d));
-           return d;
-         } // Update tiles based on current state of `projection`.
+           var placement = _placement.apply(this, arguments);
 
+           popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
 
-         function background(selection) {
-           _zoom = geoScaleToZoom(_projection.scale(), _tileSize);
-           var pixelOffset;
+           var alignment = _alignment.apply(this, arguments);
 
-           if (_source) {
-             pixelOffset = [_source.offset()[0] * Math.pow(2, _zoom), _source.offset()[1] * Math.pow(2, _zoom)];
-           } else {
-             pixelOffset = [0, 0];
+           var alignFactor = 0.5;
+
+           if (alignment === 'leading') {
+             alignFactor = 0;
+           } else if (alignment === 'trailing') {
+             alignFactor = 1;
            }
 
-           var translate = [_projection.translate()[0] + pixelOffset[0], _projection.translate()[1] + pixelOffset[1]];
-           tiler.scale(_projection.scale() * 2 * Math.PI).translate(translate);
-           _tileOrigin = [_projection.scale() * Math.PI - translate[0], _projection.scale() * Math.PI - translate[1]];
-           render(selection);
-         } // Derive the tiles onscreen, remove those offscreen and position them.
-         // Important that this part not depend on `_projection` because it's
-         // rentered when tiles load/error (see #644).
+           var anchorFrame = getFrame(anchor.node());
+           var popoverFrame = getFrame(popoverSelection.node());
+           var position;
 
+           switch (placement) {
+             case 'top':
+               position = {
+                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+                 y: anchorFrame.y - popoverFrame.h
+               };
+               break;
 
-         function render(selection) {
-           if (!_source) return;
-           var requests = [];
-           var showDebug = context.getDebug('tile') && !_source.overlay;
+             case 'bottom':
+               position = {
+                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
+                 y: anchorFrame.y + anchorFrame.h
+               };
+               break;
 
-           if (_source.validZoom(_zoom)) {
-             tiler.skipNullIsland(!!_source.overlay);
-             tiler().forEach(function (d) {
-               addSource(d);
-               if (d[3] === '') return;
-               if (typeof d[3] !== 'string') return; // Workaround for #2295
+             case 'left':
+               position = {
+                 x: anchorFrame.x - popoverFrame.w,
+                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+               };
+               break;
 
-               requests.push(d);
+             case 'right':
+               position = {
+                 x: anchorFrame.x + anchorFrame.w,
+                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
+               };
+               break;
+           }
 
-               if (_cache[d[3]] === false && lookUp(d)) {
-                 requests.push(addSource(lookUp(d)));
+           if (position) {
+             if (scrollNode && (placement === 'top' || placement === 'bottom')) {
+               var initialPosX = position.x;
+
+               if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
+                 position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
+               } else if (position.x < 10) {
+                 position.x = 10;
                }
-             });
-             requests = uniqueBy(requests, 3).filter(function (r) {
-               // don't re-request tiles which have failed in the past
-               return _cache[r[3]] !== false;
-             });
-           }
 
-           function load(d3_event, d) {
-             _cache[d[3]] = true;
-             select(this).on('error', null).on('load', null).classed('tile-loaded', true);
-             render(selection);
+               var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
+
+               var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
+               arrow.style('left', ~~arrowPosX + 'px');
+             }
+
+             popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
+           } else {
+             popoverSelection.style('left', null).style('top', null);
            }
 
-           function error(d3_event, d) {
-             _cache[d[3]] = false;
-             select(this).on('error', null).on('load', null).remove();
-             render(selection);
+           function getFrame(node) {
+             var positionStyle = select(node).style('position');
+
+             if (positionStyle === 'absolute' || positionStyle === 'static') {
+               return {
+                 x: node.offsetLeft - scrollLeft,
+                 y: node.offsetTop - scrollTop,
+                 w: node.offsetWidth,
+                 h: node.offsetHeight
+               };
+             } else {
+               return {
+                 x: 0,
+                 y: 0,
+                 w: node.offsetWidth,
+                 h: node.offsetHeight
+               };
+             }
            }
+         }
 
-           function imageTransform(d) {
-             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
+         function hide() {
+           var anchor = select(this);
 
-             var scale = tileSizeAtZoom(d, _zoom);
-             return 'translate(' + (d[0] * ts - _tileOrigin[0]) + 'px,' + (d[1] * ts - _tileOrigin[1]) + 'px) ' + 'scale(' + scale + ',' + scale + ')';
+           if (_displayType.apply(this, arguments) === 'clickFocus') {
+             anchor.classed('active', false);
            }
 
-           function tileCenter(d) {
-             var ts = _tileSize * Math.pow(2, _zoom - d[2]);
+           anchor.selectAll('.popover-' + _id).classed('in', false);
+         }
 
-             return [d[0] * ts - _tileOrigin[0] + ts / 2, d[1] * ts - _tileOrigin[1] + ts / 2];
+         function toggle() {
+           if (select(this).select('.popover-' + _id).classed('in')) {
+             hide.apply(this, arguments);
+           } else {
+             show.apply(this, arguments);
            }
+         }
 
-           function debugTransform(d) {
-             var coord = tileCenter(d);
-             return 'translate(' + coord[0] + 'px,' + coord[1] + 'px)';
-           } // Pick a representative tile near the center of the viewport
-           // (This is useful for sampling the imagery vintage)
+         return popover;
+       }
 
+       function uiTooltip(klass) {
+         var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
 
-           var dims = tiler.size();
-           var mapCenter = [dims[0] / 2, dims[1] / 2];
-           var minDist = Math.max(dims[0], dims[1]);
-           var nearCenter;
-           requests.forEach(function (d) {
-             var c = tileCenter(d);
-             var dist = geoVecLength(c, mapCenter);
+         var _title = function _title() {
+           var title = this.getAttribute('data-original-title');
 
-             if (dist < minDist) {
-               minDist = dist;
-               nearCenter = d;
-             }
-           });
-           var image = selection.selectAll('img').data(requests, function (d) {
-             return d[3];
-           });
-           image.exit().style(transformProp, imageTransform).classed('tile-removing', true).classed('tile-center', false).each(function () {
-             var tile = select(this);
-             window.setTimeout(function () {
-               if (tile.classed('tile-removing')) {
-                 tile.remove();
-               }
-             }, 300);
-           });
-           image.enter().append('img').attr('class', 'tile').attr('draggable', 'false').style('width', _tileSize + 'px').style('height', _tileSize + 'px').attr('src', function (d) {
-             return d[3];
-           }).on('error', error).on('load', load).merge(image).style(transformProp, imageTransform).classed('tile-debug', showDebug).classed('tile-removing', false).classed('tile-center', function (d) {
-             return d === nearCenter;
-           });
-           var debug = selection.selectAll('.tile-label-debug').data(showDebug ? requests : [], function (d) {
-             return d[3];
-           });
-           debug.exit().remove();
+           if (title) {
+             return title;
+           } else {
+             title = this.getAttribute('title');
+             this.removeAttribute('title');
+             this.setAttribute('data-original-title', title);
+           }
 
-           if (showDebug) {
-             var debugEnter = debug.enter().append('div').attr('class', 'tile-label-debug');
-             debugEnter.append('div').attr('class', 'tile-label-debug-coord');
-             debugEnter.append('div').attr('class', 'tile-label-debug-vintage');
-             debug = debug.merge(debugEnter);
-             debug.style(transformProp, debugTransform);
-             debug.selectAll('.tile-label-debug-coord').html(function (d) {
-               return d[2] + ' / ' + d[0] + ' / ' + d[1];
-             });
-             debug.selectAll('.tile-label-debug-vintage').each(function (d) {
-               var span = select(this);
-               var center = context.projection.invert(tileCenter(d));
+           return title;
+         };
 
-               _source.getMetadata(center, d, function (err, result) {
-                 span.html(result && result.vintage && result.vintage.range || _t('info_panels.background.vintage') + ': ' + _t('info_panels.background.unknown'));
-               });
-             });
-           }
-         }
+         var _heading = utilFunctor(null);
 
-         background.projection = function (val) {
-           if (!arguments.length) return _projection;
-           _projection = val;
-           return background;
+         var _keys = utilFunctor(null);
+
+         tooltip.title = function (val) {
+           if (!arguments.length) return _title;
+           _title = utilFunctor(val);
+           return tooltip;
          };
 
-         background.dimensions = function (val) {
-           if (!arguments.length) return tiler.size();
-           tiler.size(val);
-           return background;
+         tooltip.heading = function (val) {
+           if (!arguments.length) return _heading;
+           _heading = utilFunctor(val);
+           return tooltip;
          };
 
-         background.source = function (val) {
-           if (!arguments.length) return _source;
-           _source = val;
-           _tileSize = _source.tileSize;
-           _cache = {};
-           tiler.tileSize(_source.tileSize).zoomExtent(_source.zoomExtent);
-           return background;
+         tooltip.keys = function (val) {
+           if (!arguments.length) return _keys;
+           _keys = utilFunctor(val);
+           return tooltip;
          };
 
-         return background;
-       }
+         tooltip.content(function () {
+           var heading = _heading.apply(this, arguments);
 
-       var _imageryIndex = null;
-       function rendererBackground(context) {
-         var dispatch$1 = dispatch('change');
-         var detected = utilDetect();
-         var baseLayer = rendererTileLayer(context).projection(context.projection);
-         var _isValid = true;
-         var _overlayLayers = [];
-         var _brightness = 1;
-         var _contrast = 1;
-         var _saturation = 1;
-         var _sharpness = 1;
+           var text = _title.apply(this, arguments);
 
-         function ensureImageryIndex() {
-           return _mainFileFetcher.get('imagery').then(function (sources) {
-             if (_imageryIndex) return _imageryIndex;
-             _imageryIndex = {
-               imagery: sources,
-               features: {}
-             }; // use which-polygon to support efficient index and querying for imagery
+           var keys = _keys.apply(this, arguments);
 
-             var features = sources.map(function (source) {
-               if (!source.polygon) return null; // workaround for editor-layer-index weirdness..
-               // Add an extra array nest to each element in `source.polygon`
-               // so the rings are not treated as a bunch of holes:
-               // what we have: [ [[outer],[hole],[hole]] ]
-               // what we want: [ [[outer]],[[outer]],[[outer]] ]
+           return function (selection) {
+             var headingSelect = selection.selectAll('.tooltip-heading').data(heading ? [heading] : []);
+             headingSelect.exit().remove();
+             headingSelect.enter().append('div').attr('class', 'tooltip-heading').merge(headingSelect).html(heading);
+             var textSelect = selection.selectAll('.tooltip-text').data(text ? [text] : []);
+             textSelect.exit().remove();
+             textSelect.enter().append('div').attr('class', 'tooltip-text').merge(textSelect).html(text);
+             var keyhintWrap = selection.selectAll('.keyhint-wrap').data(keys && keys.length ? [0] : []);
+             keyhintWrap.exit().remove();
+             var keyhintWrapEnter = keyhintWrap.enter().append('div').attr('class', 'keyhint-wrap');
+             keyhintWrapEnter.append('span').call(_t.append('tooltip_keyhint'));
+             keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
+             keyhintWrap.selectAll('kbd.shortcut').data(keys && keys.length ? keys : []).enter().append('kbd').attr('class', 'shortcut').html(function (d) {
+               return d;
+             });
+           };
+         });
+         return tooltip;
+       }
 
-               var rings = source.polygon.map(function (ring) {
-                 return [ring];
-               });
-               var feature = {
-                 type: 'Feature',
-                 properties: {
-                   id: source.id
-                 },
-                 geometry: {
-                   type: 'MultiPolygon',
-                   coordinates: rings
-                 }
-               };
-               _imageryIndex.features[source.id] = feature;
-               return feature;
-             }).filter(Boolean);
-             _imageryIndex.query = whichPolygon_1({
-               type: 'FeatureCollection',
-               features: features
-             }); // Instantiate `rendererBackgroundSource` objects for each source
+       function uiEditMenu(context) {
+         var dispatch = dispatch$8('toggled');
 
-             _imageryIndex.backgrounds = sources.map(function (source) {
-               if (source.type === 'bing') {
-                 return rendererBackgroundSource.Bing(source, dispatch$1);
-               } else if (/^EsriWorldImagery/.test(source.id)) {
-                 return rendererBackgroundSource.Esri(source);
-               } else {
-                 return rendererBackgroundSource(source);
-               }
-             }); // Add 'None'
+         var _menu = select(null);
 
-             _imageryIndex.backgrounds.unshift(rendererBackgroundSource.None()); // Add 'Custom'
+         var _operations = []; // the position the menu should be displayed relative to
 
+         var _anchorLoc = [0, 0];
+         var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
 
-             var template = corePreferences('background-custom-template') || '';
-             var custom = rendererBackgroundSource.Custom(template);
+         var _triggerType = '';
+         var _vpTopMargin = 85; // viewport top margin
 
-             _imageryIndex.backgrounds.unshift(custom);
+         var _vpBottomMargin = 45; // viewport bottom margin
 
-             return _imageryIndex;
-           });
-         }
+         var _vpSideMargin = 35; // viewport side margin
 
-         function background(selection) {
-           var currSource = baseLayer.source(); // If we are displaying an Esri basemap at high zoom,
-           // check its tilemap to see how high the zoom can go
+         var _menuTop = false;
 
-           if (context.map().zoom() > 18) {
-             if (currSource && /^EsriWorldImagery/.test(currSource.id)) {
-               var center = context.map().center();
-               currSource.fetchTilemap(center);
-             }
-           } // Is the imagery valid here? - #4827
+         var _menuHeight;
 
+         var _menuWidth; // hardcode these values to make menu positioning easier
 
-           var sources = background.sources(context.map().extent());
-           var wasValid = _isValid;
-           _isValid = !!sources.filter(function (d) {
-             return d === currSource;
-           }).length;
 
-           if (wasValid !== _isValid) {
-             // change in valid status
-             background.updateImagery();
-           }
+         var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
 
-           var baseFilter = '';
+         var _tooltipWidth = 210; // offset the menu slightly from the target location
 
-           if (detected.cssfilters) {
-             if (_brightness !== 1) {
-               baseFilter += " brightness(".concat(_brightness, ")");
-             }
+         var _menuSideMargin = 10;
+         var _tooltips = [];
 
-             if (_contrast !== 1) {
-               baseFilter += " contrast(".concat(_contrast, ")");
-             }
+         var editMenu = function editMenu(selection) {
+           var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
 
-             if (_saturation !== 1) {
-               baseFilter += " saturate(".concat(_saturation, ")");
-             }
+           var ops = _operations.filter(function (op) {
+             return !isTouchMenu || !op.mouseOnly;
+           });
 
-             if (_sharpness < 1) {
-               // gaussian blur
-               var blur = d3_interpolateNumber(0.5, 5)(1 - _sharpness);
-               baseFilter += " blur(".concat(blur, "px)");
-             }
-           }
+           if (!ops.length) return;
+           _tooltips = []; // Position the menu above the anchor for stylus and finger input
+           // since the mapper's hand likely obscures the screen below the anchor
 
-           var base = selection.selectAll('.layer-background').data([0]);
-           base = base.enter().insert('div', '.layer-data').attr('class', 'layer layer-background').merge(base);
+           _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
 
-           if (detected.cssfilters) {
-             base.style('filter', baseFilter || null);
+           var showLabels = isTouchMenu;
+           var buttonHeight = showLabels ? 32 : 34;
+
+           if (showLabels) {
+             // Get a general idea of the width based on the length of the label
+             _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function (op) {
+               return op.title.length;
+             })));
            } else {
-             base.style('opacity', _brightness);
+             _menuWidth = 44;
            }
 
-           var imagery = base.selectAll('.layer-imagery').data([0]);
-           imagery.enter().append('div').attr('class', 'layer layer-imagery').merge(imagery).call(baseLayer);
-           var maskFilter = '';
-           var mixBlendMode = '';
+           _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
+           _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
 
-           if (detected.cssfilters && _sharpness > 1) {
-             // apply unsharp mask
-             mixBlendMode = 'overlay';
-             maskFilter = 'saturate(0) blur(3px) invert(1)';
-             var contrast = _sharpness - 1;
-             maskFilter += " contrast(".concat(contrast, ")");
-             var brightness = d3_interpolateNumber(1, 0.85)(_sharpness - 1);
-             maskFilter += " brightness(".concat(brightness, ")");
-           }
+           var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
 
-           var mask = base.selectAll('.layer-unsharp-mask').data(detected.cssfilters && _sharpness > 1 ? [0] : []);
-           mask.exit().remove();
-           mask.enter().append('div').attr('class', 'layer layer-mask layer-unsharp-mask').merge(mask).call(baseLayer).style('filter', maskFilter || null).style('mix-blend-mode', mixBlendMode || null);
-           var overlays = selection.selectAll('.layer-overlay').data(_overlayLayers, function (d) {
-             return d.source().name();
+
+           var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+             return 'edit-menu-item edit-menu-item-' + d.id;
+           }).style('height', buttonHeight + 'px').on('click', click) // don't listen for `mouseup` because we only care about non-mouse pointer types
+           .on('pointerup', pointerup).on('pointerdown mousedown', function pointerdown(d3_event) {
+             // don't let button presses also act as map input - #1869
+             d3_event.stopPropagation();
+           }).on('mouseenter.highlight', function (d3_event, d) {
+             if (!d.relatedEntityIds || select(this).classed('disabled')) return;
+             utilHighlightEntities(d.relatedEntityIds(), true, context);
+           }).on('mouseleave.highlight', function (d3_event, d) {
+             if (!d.relatedEntityIds) return;
+             utilHighlightEntities(d.relatedEntityIds(), false, context);
            });
-           overlays.exit().remove();
-           overlays.enter().insert('div', '.layer-data').attr('class', 'layer layer-overlay').merge(overlays).each(function (layer, i, nodes) {
-             return select(nodes[i]).call(layer);
+           buttonsEnter.each(function (d) {
+             var tooltip = uiTooltip().heading(d.title).title(d.tooltip()).keys([d.keys[0]]);
+
+             _tooltips.push(tooltip);
+
+             select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon(d.icon && d.icon() || '#iD-operation-' + d.id, 'operation'));
            });
-         }
 
-         background.updateImagery = function () {
-           var currSource = baseLayer.source();
-           if (context.inIntro() || !currSource) return;
+           if (showLabels) {
+             buttonsEnter.append('span').attr('class', 'label').html(function (d) {
+               return d.title;
+             });
+           } // update
 
-           var o = _overlayLayers.filter(function (d) {
-             return !d.source().isLocatorOverlay() && !d.source().isHidden();
-           }).map(function (d) {
-             return d.source().id;
-           }).join(',');
 
-           var meters = geoOffsetToMeters(currSource.offset());
-           var EPSILON = 0.01;
-           var x = +meters[0].toFixed(2);
-           var y = +meters[1].toFixed(2);
-           var hash = utilStringQs(window.location.hash);
-           var id = currSource.id;
+           buttonsEnter.merge(buttons).classed('disabled', function (d) {
+             return d.disabled();
+           });
+           updatePosition();
+           var initialScale = context.projection.scale();
+           context.map().on('move.edit-menu', function () {
+             if (initialScale !== context.projection.scale()) {
+               editMenu.close();
+             }
+           }).on('drawn.edit-menu', function (info) {
+             if (info.full) updatePosition();
+           });
+           var lastPointerUpType; // `pointerup` is always called before `click`
 
-           if (id === 'custom') {
-             id = "custom:".concat(currSource.template());
+           function pointerup(d3_event) {
+             lastPointerUpType = d3_event.pointerType;
            }
 
-           if (id) {
-             hash.background = id;
-           } else {
-             delete hash.background;
+           function click(d3_event, operation) {
+             d3_event.stopPropagation();
+
+             if (operation.relatedEntityIds) {
+               utilHighlightEntities(operation.relatedEntityIds(), false, context);
+             }
+
+             if (operation.disabled()) {
+               if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+                 // there are no tooltips for touch interactions so flash feedback instead
+                 context.ui().flash.duration(4000).iconName('#iD-operation-' + operation.id).iconClass('operation disabled').label(operation.tooltip)();
+               }
+             } else {
+               if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+                 context.ui().flash.duration(2000).iconName('#iD-operation-' + operation.id).iconClass('operation').label(operation.annotation() || operation.title)();
+               }
+
+               operation();
+               editMenu.close();
+             }
+
+             lastPointerUpType = null;
            }
 
-           if (o) {
-             hash.overlays = o;
-           } else {
-             delete hash.overlays;
+           dispatch.call('toggled', this, true);
+         };
+
+         function updatePosition() {
+           if (!_menu || _menu.empty()) return;
+           var anchorLoc = context.projection(_anchorLocLonLat);
+           var viewport = context.surfaceRect();
+
+           if (anchorLoc[0] < 0 || anchorLoc[0] > viewport.width || anchorLoc[1] < 0 || anchorLoc[1] > viewport.height) {
+             // close the menu if it's gone offscreen
+             editMenu.close();
+             return;
            }
 
-           if (Math.abs(x) > EPSILON || Math.abs(y) > EPSILON) {
-             hash.offset = "".concat(x, ",").concat(y);
+           var menuLeft = displayOnLeft(viewport);
+           var offset = [0, 0];
+           offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+
+           if (_menuTop) {
+             if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
+               // menu is near top viewport edge, shift downward
+               offset[1] = -anchorLoc[1] + _vpTopMargin;
+             } else {
+               offset[1] = -_menuHeight;
+             }
            } else {
-             delete hash.offset;
+             if (anchorLoc[1] + _menuHeight > viewport.height - _vpBottomMargin) {
+               // menu is near bottom viewport edge, shift upwards
+               offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
+             } else {
+               offset[1] = 0;
+             }
            }
 
-           if (!window.mocha) {
-             window.location.replace('#' + utilQsString(hash, true));
-           }
+           var origin = geoVecAdd(anchorLoc, offset);
 
-           var imageryUsed = [];
-           var photoOverlaysUsed = [];
-           var currUsed = currSource.imageryUsed();
+           _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
 
-           if (currUsed && _isValid) {
-             imageryUsed.push(currUsed);
-           }
+           var tooltipSide = tooltipPosition(viewport, menuLeft);
 
-           _overlayLayers.filter(function (d) {
-             return !d.source().isLocatorOverlay() && !d.source().isHidden();
-           }).forEach(function (d) {
-             return imageryUsed.push(d.source().imageryUsed());
+           _tooltips.forEach(function (tooltip) {
+             tooltip.placement(tooltipSide);
            });
 
-           var dataLayer = context.layers().layer('data');
+           function displayOnLeft(viewport) {
+             if (_mainLocalizer.textDirection() === 'ltr') {
+               if (anchorLoc[0] + _menuSideMargin + _menuWidth > viewport.width - _vpSideMargin) {
+                 // right menu would be too close to the right viewport edge, go left
+                 return true;
+               } // prefer right menu
 
-           if (dataLayer && dataLayer.enabled() && dataLayer.hasData()) {
-             imageryUsed.push(dataLayer.getSrc());
-           }
 
-           var photoOverlayLayers = {
-             streetside: 'Bing Streetside',
-             mapillary: 'Mapillary Images',
-             'mapillary-map-features': 'Mapillary Map Features',
-             'mapillary-signs': 'Mapillary Signs',
-             openstreetcam: 'OpenStreetCam Images'
-           };
+               return false;
+             } else {
+               // rtl
+               if (anchorLoc[0] - _menuSideMargin - _menuWidth < _vpSideMargin) {
+                 // left menu would be too close to the left viewport edge, go right
+                 return false;
+               } // prefer left menu
 
-           for (var layerID in photoOverlayLayers) {
-             var layer = context.layers().layer(layerID);
 
-             if (layer && layer.enabled()) {
-               photoOverlaysUsed.push(layerID);
-               imageryUsed.push(photoOverlayLayers[layerID]);
+               return true;
              }
            }
 
-           context.history().imageryUsed(imageryUsed);
-           context.history().photoOverlaysUsed(photoOverlaysUsed);
-         };
+           function tooltipPosition(viewport, menuLeft) {
+             if (_mainLocalizer.textDirection() === 'ltr') {
+               if (menuLeft) {
+                 // if there's not room for a right-side menu then there definitely
+                 // isn't room for right-side tooltips
+                 return 'left';
+               }
 
-         var _checkedBlocklists;
+               if (anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth > viewport.width - _vpSideMargin) {
+                 // right tooltips would be too close to the right viewport edge, go left
+                 return 'left';
+               } // prefer right tooltips
 
-         background.sources = function (extent, zoom, includeCurrent) {
-           if (!_imageryIndex) return []; // called before init()?
 
-           var visible = {};
-           (_imageryIndex.query.bbox(extent.rectangle(), true) || []).forEach(function (d) {
-             return visible[d.id] = true;
-           });
-           var currSource = baseLayer.source();
-           var osm = context.connection();
-           var blocklists = osm && osm.imageryBlocklists();
+               return 'right';
+             } else {
+               // rtl
+               if (!menuLeft) {
+                 return 'right';
+               }
 
-           if (blocklists && blocklists !== _checkedBlocklists) {
-             _imageryIndex.backgrounds.forEach(function (source) {
-               source.isBlocked = blocklists.some(function (blocklist) {
-                 return blocklist.test(source.template());
-               });
-             });
+               if (anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth < _vpSideMargin) {
+                 // left tooltips would be too close to the left viewport edge, go right
+                 return 'right';
+               } // prefer left tooltips
+
+
+               return 'left';
+             }
+           }
+         }
+
+         editMenu.close = function () {
+           context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
+
+           _menu.remove();
+
+           _tooltips = [];
+           dispatch.call('toggled', this, false);
+         };
+
+         editMenu.anchorLoc = function (val) {
+           if (!arguments.length) return _anchorLoc;
+           _anchorLoc = val;
+           _anchorLocLonLat = context.projection.invert(_anchorLoc);
+           return editMenu;
+         };
 
-             _checkedBlocklists = blocklists;
-           }
+         editMenu.triggerType = function (val) {
+           if (!arguments.length) return _triggerType;
+           _triggerType = val;
+           return editMenu;
+         };
 
-           return _imageryIndex.backgrounds.filter(function (source) {
-             if (includeCurrent && currSource === source) return true; // optionally always include the current imagery
+         editMenu.operations = function (val) {
+           if (!arguments.length) return _operations;
+           _operations = val;
+           return editMenu;
+         };
 
-             if (source.isBlocked) return false; // even bundled sources may be blocked - #7905
+         return utilRebind(editMenu, dispatch, 'on');
+       }
 
-             if (!source.polygon) return true; // always include imagery with worldwide coverage
+       function uiFeatureInfo(context) {
+         function update(selection) {
+           var features = context.features();
+           var stats = features.stats();
+           var count = 0;
+           var hiddenList = features.hidden().map(function (k) {
+             if (stats[k]) {
+               count += stats[k];
+               return _t.html('inspector.title_count', {
+                 title: {
+                   html: _t.html('feature.' + k + '.description')
+                 },
+                 count: stats[k]
+               });
+             }
 
-             if (zoom && zoom < 6) return false; // optionally exclude local imagery at low zooms
+             return null;
+           }).filter(Boolean);
+           selection.html('');
 
-             return visible[source.id]; // include imagery visible in given extent
-           });
-         };
+           if (hiddenList.length) {
+             var tooltipBehavior = uiTooltip().placement('top').title(function () {
+               return hiddenList.join('<br/>');
+             });
+             selection.append('a').attr('class', 'chip').attr('href', '#').call(_t.append('feature_info.hidden_warning', {
+               count: count
+             })).call(tooltipBehavior).on('click', function (d3_event) {
+               tooltipBehavior.hide();
+               d3_event.preventDefault(); // open the Map Data pane
 
-         background.dimensions = function (val) {
-           if (!val) return;
-           baseLayer.dimensions(val);
+               context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+             });
+           }
 
-           _overlayLayers.forEach(function (layer) {
-             return layer.dimensions(val);
+           selection.classed('hide', !hiddenList.length);
+         }
+
+         return function (selection) {
+           update(selection);
+           context.features().on('change.feature_info', function () {
+             update(selection);
            });
          };
+       }
 
-         background.baseLayerSource = function (d) {
-           if (!arguments.length) return baseLayer.source(); // test source against OSM imagery blocklists..
-
-           var osm = context.connection();
-           if (!osm) return background;
-           var blocklists = osm.imageryBlocklists();
-           var template = d.template();
-           var fail = false;
-           var tested = 0;
-           var regex;
-
-           for (var i = 0; i < blocklists.length; i++) {
-             regex = blocklists[i];
-             fail = regex.test(template);
-             tested++;
-             if (fail) break;
-           } // ensure at least one test was run.
+       function uiFlash(context) {
+         var _flashTimer;
 
+         var _duration = 2000;
+         var _iconName = '#iD-icon-no';
+         var _iconClass = 'disabled';
+         var _label = '';
 
-           if (!tested) {
-             regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
-             fail = regex.test(template);
+         function flash() {
+           if (_flashTimer) {
+             _flashTimer.stop();
            }
 
-           baseLayer.source(!fail ? d : background.findSource('none'));
-           dispatch$1.call('change');
-           background.updateImagery();
-           return background;
-         };
+           context.container().select('.main-footer-wrap').classed('footer-hide', true).classed('footer-show', false);
+           context.container().select('.flash-wrap').classed('footer-hide', false).classed('footer-show', true);
+           var content = context.container().select('.flash-wrap').selectAll('.flash-content').data([0]); // Enter
 
-         background.findSource = function (id) {
-           if (!id || !_imageryIndex) return null; // called before init()?
+           var contentEnter = content.enter().append('div').attr('class', 'flash-content');
+           var iconEnter = contentEnter.append('svg').attr('class', 'flash-icon icon').append('g').attr('transform', 'translate(10,10)');
+           iconEnter.append('circle').attr('r', 9);
+           iconEnter.append('use').attr('transform', 'translate(-7,-7)').attr('width', '14').attr('height', '14');
+           contentEnter.append('div').attr('class', 'flash-text'); // Update
 
-           return _imageryIndex.backgrounds.find(function (d) {
-             return d.id && d.id === id;
-           });
-         };
+           content = content.merge(contentEnter);
+           content.selectAll('.flash-icon').attr('class', 'icon flash-icon ' + (_iconClass || ''));
+           content.selectAll('.flash-icon use').attr('xlink:href', _iconName);
+           content.selectAll('.flash-text').attr('class', 'flash-text').html(_label);
+           _flashTimer = d3_timeout(function () {
+             _flashTimer = null;
+             context.container().select('.main-footer-wrap').classed('footer-hide', false).classed('footer-show', true);
+             context.container().select('.flash-wrap').classed('footer-hide', true).classed('footer-show', false);
+           }, _duration);
+           return content;
+         }
 
-         background.bing = function () {
-           background.baseLayerSource(background.findSource('Bing'));
+         flash.duration = function (_) {
+           if (!arguments.length) return _duration;
+           _duration = _;
+           return flash;
          };
 
-         background.showsLayer = function (d) {
-           var currSource = baseLayer.source();
-           if (!d || !currSource) return false;
-           return d.id === currSource.id || _overlayLayers.some(function (layer) {
-             return d.id === layer.source().id;
-           });
+         flash.label = function (_) {
+           if (!arguments.length) return _label;
+           _label = _;
+           return flash;
          };
 
-         background.overlayLayerSources = function () {
-           return _overlayLayers.map(function (layer) {
-             return layer.source();
-           });
+         flash.iconName = function (_) {
+           if (!arguments.length) return _iconName;
+           _iconName = _;
+           return flash;
          };
 
-         background.toggleOverlayLayer = function (d) {
-           var layer;
+         flash.iconClass = function (_) {
+           if (!arguments.length) return _iconClass;
+           _iconClass = _;
+           return flash;
+         };
 
-           for (var i = 0; i < _overlayLayers.length; i++) {
-             layer = _overlayLayers[i];
+         return flash;
+       }
 
-             if (layer.source() === d) {
-               _overlayLayers.splice(i, 1);
+       function uiFullScreen(context) {
+         var element = context.container().node(); // var button = d3_select(null);
 
-               dispatch$1.call('change');
-               background.updateImagery();
-               return;
-             }
+         function getFullScreenFn() {
+           if (element.requestFullscreen) {
+             return element.requestFullscreen;
+           } else if (element.msRequestFullscreen) {
+             return element.msRequestFullscreen;
+           } else if (element.mozRequestFullScreen) {
+             return element.mozRequestFullScreen;
+           } else if (element.webkitRequestFullscreen) {
+             return element.webkitRequestFullscreen;
            }
+         }
 
-           layer = rendererTileLayer(context).source(d).projection(context.projection).dimensions(baseLayer.dimensions());
-
-           _overlayLayers.push(layer);
-
-           dispatch$1.call('change');
-           background.updateImagery();
-         };
-
-         background.nudge = function (d, zoom) {
-           var currSource = baseLayer.source();
-
-           if (currSource) {
-             currSource.nudge(d, zoom);
-             dispatch$1.call('change');
-             background.updateImagery();
+         function getExitFullScreenFn() {
+           if (document.exitFullscreen) {
+             return document.exitFullscreen;
+           } else if (document.msExitFullscreen) {
+             return document.msExitFullscreen;
+           } else if (document.mozCancelFullScreen) {
+             return document.mozCancelFullScreen;
+           } else if (document.webkitExitFullscreen) {
+             return document.webkitExitFullscreen;
            }
+         }
 
-           return background;
-         };
+         function isFullScreen() {
+           return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
+         }
 
-         background.offset = function (d) {
-           var currSource = baseLayer.source();
+         function isSupported() {
+           return !!getFullScreenFn();
+         }
 
-           if (!arguments.length) {
-             return currSource && currSource.offset() || [0, 0];
-           }
+         function fullScreen(d3_event) {
+           d3_event.preventDefault();
 
-           if (currSource) {
-             currSource.offset(d);
-             dispatch$1.call('change');
-             background.updateImagery();
+           if (!isFullScreen()) {
+             // button.classed('active', true);
+             getFullScreenFn().apply(element);
+           } else {
+             // button.classed('active', false);
+             getExitFullScreenFn().apply(document);
            }
+         }
 
-           return background;
-         };
-
-         background.brightness = function (d) {
-           if (!arguments.length) return _brightness;
-           _brightness = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
-         };
+         return function () {
+           // selection) {
+           if (!isSupported()) return; // button = selection.append('button')
+           //     .attr('title', t('full_screen'))
+           //     .on('click', fullScreen)
+           //     .call(tooltip);
+           // button.append('span')
+           //     .attr('class', 'icon full-screen');
 
-         background.contrast = function (d) {
-           if (!arguments.length) return _contrast;
-           _contrast = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
+           var detected = utilDetect();
+           var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
+           context.keybinding().on(keys, fullScreen);
          };
+       }
 
-         background.saturation = function (d) {
-           if (!arguments.length) return _saturation;
-           _saturation = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
-         };
+       function uiGeolocate(context) {
+         var _geolocationOptions = {
+           // prioritize speed and power usage over precision
+           enableHighAccuracy: false,
+           // don't hang indefinitely getting the location
+           timeout: 6000 // 6sec
 
-         background.sharpness = function (d) {
-           if (!arguments.length) return _sharpness;
-           _sharpness = d;
-           if (context.mode()) dispatch$1.call('change');
-           return background;
          };
 
-         var _loadPromise;
+         var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
 
-         background.ensureLoaded = function () {
-           if (_loadPromise) return _loadPromise;
+         var _layer = context.layers().layer('geolocate');
 
-           function parseMapParams(qmap) {
-             if (!qmap) return false;
-             var params = qmap.split('/').map(Number);
-             if (params.length < 3 || params.some(isNaN)) return false;
-             return geoExtent([params[2], params[1]]); // lon,lat
-           }
+         var _position;
 
-           var hash = utilStringQs(window.location.hash);
-           var requested = hash.background || hash.layer;
-           var extent = parseMapParams(hash.map);
-           return _loadPromise = ensureImageryIndex().then(function (imageryIndex) {
-             var first = imageryIndex.backgrounds.length && imageryIndex.backgrounds[0];
-             var best;
+         var _extent;
 
-             if (!requested && extent) {
-               best = background.sources(extent).find(function (s) {
-                 return s.best();
-               });
-             } // Decide which background layer to display
+         var _timeoutID;
 
+         var _button = select(null);
 
-             if (requested && requested.indexOf('custom:') === 0) {
-               var template = requested.replace(/^custom:/, '');
-               var custom = background.findSource('custom');
-               background.baseLayerSource(custom.template(template));
-               corePreferences('background-custom-template', template);
-             } else {
-               background.baseLayerSource(background.findSource(requested) || best || background.findSource(corePreferences('background-last-used')) || background.findSource('Bing') || first || background.findSource('none'));
-             }
+         function click() {
+           if (context.inIntro()) return;
 
-             var locator = imageryIndex.backgrounds.find(function (d) {
-               return d.overlay && d["default"];
-             });
+           if (!_layer.enabled() && !_locating.isShown()) {
+             // This timeout ensures that we still call finish() even if
+             // the user declines to share their location in Firefox
+             _timeoutID = setTimeout(error, 10000
+             /* 10sec */
+             );
+             context.container().call(_locating); // get the latest position even if we already have one
 
-             if (locator) {
-               background.toggleOverlayLayer(locator);
-             }
+             navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
+           } else {
+             _locating.close();
 
-             var overlays = (hash.overlays || '').split(',');
-             overlays.forEach(function (overlay) {
-               overlay = background.findSource(overlay);
+             _layer.enabled(null, false);
 
-               if (overlay) {
-                 background.toggleOverlayLayer(overlay);
-               }
-             });
+             updateButtonState();
+           }
+         }
 
-             if (hash.gpx) {
-               var gpx = context.layers().layer('data');
+         function zoomTo() {
+           context.enter(modeBrowse(context));
+           var map = context.map();
 
-               if (gpx) {
-                 gpx.url(hash.gpx, '.gpx');
-               }
-             }
+           _layer.enabled(_position, true);
 
-             if (hash.offset) {
-               var offset = hash.offset.replace(/;/g, ',').split(',').map(function (n) {
-                 return !isNaN(n) && n;
-               });
+           updateButtonState();
+           map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
+         }
 
-               if (offset.length === 2) {
-                 background.offset(geoMetersToOffset(offset));
-               }
-             }
-           })["catch"](function () {
-             /* ignore */
-           });
-         };
+         function success(geolocation) {
+           _position = geolocation;
+           var coords = _position.coords;
+           _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
+           zoomTo();
+           finish();
+         }
 
-         return utilRebind(background, dispatch$1, 'on');
-       }
+         function error() {
+           if (_position) {
+             // use the position from a previous call if we have one
+             zoomTo();
+           } else {
+             context.ui().flash.label(_t.html('geolocate.location_unavailable')).iconName('#iD-icon-geolocate')();
+           }
 
-       function rendererFeatures(context) {
-         var dispatch$1 = dispatch('change', 'redraw');
-         var features = utilRebind({}, dispatch$1, 'on');
+           finish();
+         }
 
-         var _deferred = new Set();
+         function finish() {
+           _locating.close(); // unblock ui
 
-         var traffic_roads = {
-           'motorway': true,
-           'motorway_link': true,
-           'trunk': true,
-           'trunk_link': true,
-           'primary': true,
-           'primary_link': true,
-           'secondary': true,
-           'secondary_link': true,
-           'tertiary': true,
-           'tertiary_link': true,
-           'residential': true,
-           'unclassified': true,
-           'living_street': true
-         };
-         var service_roads = {
-           'service': true,
-           'road': true,
-           'track': true
-         };
-         var paths = {
-           'path': true,
-           'footway': true,
-           'cycleway': true,
-           'bridleway': true,
-           'steps': true,
-           'pedestrian': true
-         };
-         var past_futures = {
-           'proposed': true,
-           'construction': true,
-           'abandoned': true,
-           'dismantled': true,
-           'disused': true,
-           'razed': true,
-           'demolished': true,
-           'obliterated': true
-         };
-         var _cullFactor = 1;
-         var _cache = {};
-         var _rules = {};
-         var _stats = {};
-         var _keys = [];
-         var _hidden = [];
-         var _forceVisible = {};
 
-         function update() {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
-             var disabled = features.disabled();
+           if (_timeoutID) {
+             clearTimeout(_timeoutID);
+           }
 
-             if (disabled.length) {
-               hash.disable_features = disabled.join(',');
-             } else {
-               delete hash.disable_features;
-             }
+           _timeoutID = undefined;
+         }
 
-             window.location.replace('#' + utilQsString(hash, true));
-             corePreferences('disabled-features', disabled.join(','));
-           }
+         function updateButtonState() {
+           _button.classed('active', _layer.enabled());
 
-           _hidden = features.hidden();
-           dispatch$1.call('change');
-           dispatch$1.call('redraw');
+           _button.attr('aria-pressed', _layer.enabled());
          }
 
-         function defineRule(k, filter, max) {
-           var isEnabled = true;
+         return function (selection) {
+           if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
+           _button = selection.append('button').on('click', click).attr('aria-pressed', false).call(svgIcon('#iD-icon-geolocate', 'light')).call(uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_t.html('geolocate.title')).keys([_t('geolocate.key')]));
+           context.keybinding().on(_t('geolocate.key'), click);
+         };
+       }
 
-           _keys.push(k);
+       function uiPanelBackground(context) {
+         var background = context.background();
+         var _currSourceName = null;
+         var _metadata = {};
+         var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
 
-           _rules[k] = {
-             filter: filter,
-             enabled: isEnabled,
-             // whether the user wants it enabled..
-             count: 0,
-             currentMax: max || Infinity,
-             defaultMax: max || Infinity,
-             enable: function enable() {
-               this.enabled = true;
-               this.currentMax = this.defaultMax;
-             },
-             disable: function disable() {
-               this.enabled = false;
-               this.currentMax = 0;
-             },
-             hidden: function hidden() {
-               return this.count === 0 && !this.enabled || this.count > this.currentMax * _cullFactor;
-             },
-             autoHidden: function autoHidden() {
-               return this.hidden() && this.currentMax > 0;
-             }
-           };
-         }
+         var debouncedRedraw = debounce(redraw, 250);
 
-         defineRule('points', function isPoint(tags, geometry) {
-           return geometry === 'point';
-         }, 200);
-         defineRule('traffic_roads', function isTrafficRoad(tags) {
-           return traffic_roads[tags.highway];
-         });
-         defineRule('service_roads', function isServiceRoad(tags) {
-           return service_roads[tags.highway];
-         });
-         defineRule('paths', function isPath(tags) {
-           return paths[tags.highway];
-         });
-         defineRule('buildings', function isBuilding(tags) {
-           return !!tags.building && tags.building !== 'no' || tags.parking === 'multi-storey' || tags.parking === 'sheds' || tags.parking === 'carports' || tags.parking === 'garage_boxes';
-         }, 250);
-         defineRule('building_parts', function isBuildingPart(tags) {
-           return tags['building:part'];
-         });
-         defineRule('indoor', function isIndoor(tags) {
-           return tags.indoor;
-         });
-         defineRule('landuse', function isLanduse(tags, geometry) {
-           return geometry === 'area' && !_rules.buildings.filter(tags) && !_rules.building_parts.filter(tags) && !_rules.indoor.filter(tags) && !_rules.water.filter(tags) && !_rules.pistes.filter(tags);
-         });
-         defineRule('boundaries', function isBoundary(tags) {
-           return !!tags.boundary && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway] || tags.waterway || tags.railway || tags.landuse || tags.natural || tags.building || tags.power);
-         });
-         defineRule('water', function isWater(tags) {
-           return !!tags.waterway || tags.natural === 'water' || tags.natural === 'coastline' || tags.natural === 'bay' || tags.landuse === 'pond' || tags.landuse === 'basin' || tags.landuse === 'reservoir' || tags.landuse === 'salt_pond';
-         });
-         defineRule('rail', function isRail(tags) {
-           return (!!tags.railway || tags.landuse === 'railway') && !(traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]);
-         });
-         defineRule('pistes', function isPiste(tags) {
-           return tags['piste:type'];
-         });
-         defineRule('aerialways', function isPiste(tags) {
-           return tags.aerialway && tags.aerialway !== 'yes' && tags.aerialway !== 'station';
-         });
-         defineRule('power', function isPower(tags) {
-           return !!tags.power;
-         }); // contains a past/future tag, but not in active use as a road/path/cycleway/etc..
+         function redraw(selection) {
+           var source = background.baseLayerSource();
+           if (!source) return;
+           var isDG = source.id.match(/^DigitalGlobe/i) !== null;
+           var sourceLabel = source.label();
 
-         defineRule('past_future', function isPastFuture(tags) {
-           if (traffic_roads[tags.highway] || service_roads[tags.highway] || paths[tags.highway]) {
-             return false;
+           if (_currSourceName !== sourceLabel) {
+             _currSourceName = sourceLabel;
+             _metadata = {};
            }
 
-           var strings = Object.keys(tags);
+           selection.html('');
+           var list = selection.append('ul').attr('class', 'background-info');
+           list.append('li').html(_currSourceName);
 
-           for (var i = 0; i < strings.length; i++) {
-             var s = strings[i];
+           _metadataKeys.forEach(function (k) {
+             // DigitalGlobe vintage is available in raster layers for now.
+             if (isDG && k === 'vintage') return;
+             list.append('li').attr('class', 'background-info-list-' + k).classed('hide', !_metadata[k]).call(_t.append('info_panels.background.' + k, {
+               suffix: ':'
+             })).append('span').attr('class', 'background-info-span-' + k).text(_metadata[k]);
+           });
 
-             if (past_futures[s] || past_futures[tags[s]]) {
-               return true;
-             }
-           }
+           debouncedGetMetadata(selection);
+           var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
+           selection.append('a').call(_t.append('info_panels.background.' + toggleTiles)).attr('href', '#').attr('class', 'button button-toggle-tiles').on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.setDebug('tile', !context.getDebug('tile'));
+             selection.call(redraw);
+           });
 
-           return false;
-         }); // Lines or areas that don't match another feature filter.
-         // IMPORTANT: The 'others' feature must be the last one defined,
-         //   so that code in getMatches can skip this test if `hasMatch = true`
+           if (isDG) {
+             var key = source.id + '-vintage';
+             var sourceVintage = context.background().findSource(key);
+             var showsVintage = context.background().showsLayer(sourceVintage);
+             var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
+             selection.append('a').call(_t.append('info_panels.background.' + toggleVintage)).attr('href', '#').attr('class', 'button button-toggle-vintage').on('click', function (d3_event) {
+               d3_event.preventDefault();
+               context.background().toggleOverlayLayer(sourceVintage);
+               selection.call(redraw);
+             });
+           } // disable if necessary
 
-         defineRule('others', function isOther(tags, geometry) {
-           return geometry === 'line' || geometry === 'area';
-         });
 
-         features.features = function () {
-           return _rules;
-         };
+           ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
+             if (source.id !== layerId) {
+               var key = layerId + '-vintage';
+               var sourceVintage = context.background().findSource(key);
 
-         features.keys = function () {
-           return _keys;
-         };
+               if (context.background().showsLayer(sourceVintage)) {
+                 context.background().toggleOverlayLayer(sourceVintage);
+               }
+             }
+           });
+         }
 
-         features.enabled = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return _rules[k].enabled;
-             });
-           }
+         var debouncedGetMetadata = debounce(getMetadata, 250);
 
-           return _rules[k] && _rules[k].enabled;
-         };
+         function getMetadata(selection) {
+           var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
 
-         features.disabled = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return !_rules[k].enabled;
-             });
-           }
+           if (tile.empty()) return;
+           var sourceName = _currSourceName;
+           var d = tile.datum();
+           var zoom = d && d.length >= 3 && d[2] || Math.floor(context.map().zoom());
+           var center = context.map().center(); // update zoom
 
-           return _rules[k] && !_rules[k].enabled;
-         };
+           _metadata.zoom = String(zoom);
+           selection.selectAll('.background-info-list-zoom').classed('hide', false).selectAll('.background-info-span-zoom').text(_metadata.zoom);
+           if (!d || !d.length >= 3) return;
+           background.baseLayerSource().getMetadata(center, d, function (err, result) {
+             if (err || _currSourceName !== sourceName) return; // update vintage
 
-         features.hidden = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return _rules[k].hidden();
-             });
-           }
+             var vintage = result.vintage;
+             _metadata.vintage = vintage && vintage.range || _t('info_panels.background.unknown');
+             selection.selectAll('.background-info-list-vintage').classed('hide', false).selectAll('.background-info-span-vintage').text(_metadata.vintage); // update other _metadata
 
-           return _rules[k] && _rules[k].hidden();
-         };
+             _metadataKeys.forEach(function (k) {
+               if (k === 'zoom' || k === 'vintage') return; // done already
 
-         features.autoHidden = function (k) {
-           if (!arguments.length) {
-             return _keys.filter(function (k) {
-               return _rules[k].autoHidden();
+               var val = result[k];
+               _metadata[k] = val;
+               selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).text(val);
              });
-           }
+           });
+         }
 
-           return _rules[k] && _rules[k].autoHidden();
+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.map().on('drawn.info-background', function () {
+             selection.call(debouncedRedraw);
+           }).on('move.info-background', function () {
+             selection.call(debouncedGetMetadata);
+           });
          };
 
-         features.enable = function (k) {
-           if (_rules[k] && !_rules[k].enabled) {
-             _rules[k].enable();
-
-             update();
-           }
+         panel.off = function () {
+           context.map().on('drawn.info-background', null).on('move.info-background', null);
          };
 
-         features.enableAll = function () {
-           var didEnable = false;
+         panel.id = 'background';
+         panel.label = _t.html('info_panels.background.title');
+         panel.key = _t('info_panels.background.key');
+         return panel;
+       }
 
-           for (var k in _rules) {
-             if (!_rules[k].enabled) {
-               didEnable = true;
+       function uiPanelHistory(context) {
+         var osm;
 
-               _rules[k].enable();
-             }
-           }
+         function displayTimestamp(timestamp) {
+           if (!timestamp) return _t('info_panels.history.unknown');
+           var options = {
+             day: 'numeric',
+             month: 'short',
+             year: 'numeric',
+             hour: 'numeric',
+             minute: 'numeric',
+             second: 'numeric'
+           };
+           var d = new Date(timestamp);
+           if (isNaN(d.getTime())) return _t('info_panels.history.unknown');
+           return d.toLocaleString(_mainLocalizer.localeCode(), options);
+         }
 
-           if (didEnable) update();
-         };
+         function displayUser(selection, userName) {
+           if (!userName) {
+             selection.append('span').call(_t.append('info_panels.history.unknown'));
+             return;
+           }
 
-         features.disable = function (k) {
-           if (_rules[k] && _rules[k].enabled) {
-             _rules[k].disable();
+           selection.append('span').attr('class', 'user-name').text(userName);
+           var links = selection.append('div').attr('class', 'links');
 
-             update();
+           if (osm) {
+             links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').call(_t.append('info_panels.history.profile_link'));
            }
-         };
 
-         features.disableAll = function () {
-           var didDisable = false;
+           links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).text('HDYC');
+         }
 
-           for (var k in _rules) {
-             if (_rules[k].enabled) {
-               didDisable = true;
+         function displayChangeset(selection, changeset) {
+           if (!changeset) {
+             selection.append('span').call(_t.append('info_panels.history.unknown'));
+             return;
+           }
 
-               _rules[k].disable();
-             }
+           selection.append('span').attr('class', 'changeset-id').text(changeset);
+           var links = selection.append('div').attr('class', 'links');
+
+           if (osm) {
+             links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').call(_t.append('info_panels.history.changeset_link'));
            }
 
-           if (didDisable) update();
-         };
+           links.append('a').attr('class', 'changeset-osmcha-link').attr('href', 'https://osmcha.org/changesets/' + changeset).attr('target', '_blank').text('OSMCha');
+           links.append('a').attr('class', 'changeset-achavi-link').attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset).attr('target', '_blank').text('Achavi');
+         }
 
-         features.toggle = function (k) {
-           if (_rules[k]) {
-             (function (f) {
-               return f.enabled ? f.disable() : f.enable();
-             })(_rules[k]);
+         function redraw(selection) {
+           var selectedNoteID = context.selectedNoteID();
+           osm = context.connection();
+           var selected, note, entity;
 
-             update();
-           }
-         };
+           if (selectedNoteID && osm) {
+             // selected 1 note
+             selected = [_t.html('note.note') + ' ' + selectedNoteID];
+             note = osm.getNote(selectedNoteID);
+           } else {
+             // selected 1..n entities
+             selected = context.selectedIDs().filter(function (e) {
+               return context.hasEntity(e);
+             });
 
-         features.resetStats = function () {
-           for (var i = 0; i < _keys.length; i++) {
-             _rules[_keys[i]].count = 0;
+             if (selected.length) {
+               entity = context.entity(selected[0]);
+             }
            }
 
-           dispatch$1.call('change');
-         };
+           var singular = selected.length === 1 ? selected[0] : null;
+           selection.html('');
 
-         features.gatherStats = function (d, resolver, dimensions) {
-           var needsRedraw = false;
-           var types = utilArrayGroupBy(d, 'type');
-           var entities = [].concat(types.relation || [], types.way || [], types.node || []);
-           var currHidden, geometry, matches, i, j;
+           if (singular) {
+             selection.append('h4').attr('class', 'history-heading').html(singular);
+           } else {
+             selection.append('h4').attr('class', 'history-heading').call(_t.append('info_panels.selected', {
+               n: selected.length
+             }));
+           }
 
-           for (i = 0; i < _keys.length; i++) {
-             _rules[_keys[i]].count = 0;
-           } // adjust the threshold for point/building culling based on viewport size..
-           // a _cullFactor of 1 corresponds to a 1000x1000px viewport..
+           if (!singular) return;
 
+           if (entity) {
+             selection.call(redrawEntity, entity);
+           } else if (note) {
+             selection.call(redrawNote, note);
+           }
+         }
 
-           _cullFactor = dimensions[0] * dimensions[1] / 1000000;
+         function redrawNote(selection, note) {
+           if (!note || note.isNew()) {
+             selection.append('div').call(_t.append('info_panels.history.note_no_history'));
+             return;
+           }
 
-           for (i = 0; i < entities.length; i++) {
-             geometry = entities[i].geometry(resolver);
-             matches = Object.keys(features.getMatches(entities[i], resolver, geometry));
+           var list = selection.append('ul');
+           list.append('li').call(_t.append('info_panels.history.note_comments', {
+             suffix: ':'
+           })).append('span').text(note.comments.length);
 
-             for (j = 0; j < matches.length; j++) {
-               _rules[matches[j]].count++;
-             }
+           if (note.comments.length) {
+             list.append('li').call(_t.append('info_panels.history.note_created_date', {
+               suffix: ':'
+             })).append('span').text(displayTimestamp(note.comments[0].date));
+             list.append('li').call(_t.append('info_panels.history.note_created_user', {
+               suffix: ':'
+             })).call(displayUser, note.comments[0].user);
            }
 
-           currHidden = features.hidden();
+           if (osm) {
+             selection.append('a').attr('class', 'view-history-on-osm').attr('target', '_blank').attr('href', osm.noteURL(note)).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append('info_panels.history.note_link_text'));
+           }
+         }
 
-           if (currHidden !== _hidden) {
-             _hidden = currHidden;
-             needsRedraw = true;
-             dispatch$1.call('change');
+         function redrawEntity(selection, entity) {
+           if (!entity || entity.isNew()) {
+             selection.append('div').call(_t.append('info_panels.history.no_history'));
+             return;
            }
 
-           return needsRedraw;
-         };
+           var links = selection.append('div').attr('class', 'links');
 
-         features.stats = function () {
-           for (var i = 0; i < _keys.length; i++) {
-             _stats[_keys[i]] = _rules[_keys[i]].count;
+           if (osm) {
+             links.append('a').attr('class', 'view-history-on-osm').attr('href', osm.historyURL(entity)).attr('target', '_blank').call(_t.append('info_panels.history.history_link'));
            }
 
-           return _stats;
-         };
+           links.append('a').attr('class', 'pewu-history-viewer-link').attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId()).attr('target', '_blank').attr('tabindex', -1).text('PeWu');
+           var list = selection.append('ul');
+           list.append('li').call(_t.append('info_panels.history.version', {
+             suffix: ':'
+           })).append('span').text(entity.version);
+           list.append('li').call(_t.append('info_panels.history.last_edit', {
+             suffix: ':'
+           })).append('span').text(displayTimestamp(entity.timestamp));
+           list.append('li').call(_t.append('info_panels.history.edited_by', {
+             suffix: ':'
+           })).call(displayUser, entity.user);
+           list.append('li').call(_t.append('info_panels.history.changeset', {
+             suffix: ':'
+           })).call(displayChangeset, entity.changeset);
+         }
 
-         features.clear = function (d) {
-           for (var i = 0; i < d.length; i++) {
-             features.clearEntity(d[i]);
-           }
+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.map().on('drawn.info-history', function () {
+             selection.call(redraw);
+           });
+           context.on('enter.info-history', function () {
+             selection.call(redraw);
+           });
          };
 
-         features.clearEntity = function (entity) {
-           delete _cache[osmEntity.key(entity)];
+         panel.off = function () {
+           context.map().on('drawn.info-history', null);
+           context.on('enter.info-history', null);
          };
 
-         features.reset = function () {
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
-
-             _deferred["delete"](handle);
-           });
-           _cache = {};
-         }; // only certain relations are worth checking
-
+         panel.id = 'history';
+         panel.label = _t.html('info_panels.history.title');
+         panel.key = _t('info_panels.history.key');
+         return panel;
+       }
 
-         function relationShouldBeChecked(relation) {
-           // multipolygon features have `area` geometry and aren't checked here
-           return relation.tags.type === 'boundary';
-         }
+       var OSM_PRECISION = 7;
+       /**
+        * Returns a localized representation of the given length measurement.
+        *
+        * @param {Number} m area in meters
+        * @param {Boolean} isImperial true for U.S. customary units; false for metric
+        */
 
-         features.getMatches = function (entity, resolver, geometry) {
-           if (geometry === 'vertex' || geometry === 'relation' && !relationShouldBeChecked(entity)) return {};
-           var ent = osmEntity.key(entity);
+       function displayLength(m, isImperial) {
+         var d = m * (isImperial ? 3.28084 : 1);
+         var unit;
 
-           if (!_cache[ent]) {
-             _cache[ent] = {};
+         if (isImperial) {
+           if (d >= 5280) {
+             d /= 5280;
+             unit = 'miles';
+           } else {
+             unit = 'feet';
            }
+         } else {
+           if (d >= 1000) {
+             d /= 1000;
+             unit = 'kilometers';
+           } else {
+             unit = 'meters';
+           }
+         }
 
-           if (!_cache[ent].matches) {
-             var matches = {};
-             var hasMatch = false;
-
-             for (var i = 0; i < _keys.length; i++) {
-               if (_keys[i] === 'others') {
-                 if (hasMatch) continue; // If an entity...
-                 //   1. is a way that hasn't matched other 'interesting' feature rules,
-
-                 if (entity.type === 'way') {
-                   var parents = features.getParents(entity, resolver, geometry); //   2a. belongs only to a single multipolygon relation
-
-                   if (parents.length === 1 && parents[0].isMultipolygon() || // 2b. or belongs only to boundary relations
-                   parents.length > 0 && parents.every(function (parent) {
-                     return parent.tags.type === 'boundary';
-                   })) {
-                     // ...then match whatever feature rules the parent relation has matched.
-                     // see #2548, #2887
-                     //
-                     // IMPORTANT:
-                     // For this to work, getMatches must be called on relations before ways.
-                     //
-                     var pkey = osmEntity.key(parents[0]);
+         return _t('units.' + unit, {
+           quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
+             maximumSignificantDigits: 4
+           })
+         });
+       }
+       /**
+        * Returns a localized representation of the given area measurement.
+        *
+        * @param {Number} m2 area in square meters
+        * @param {Boolean} isImperial true for U.S. customary units; false for metric
+        */
 
-                     if (_cache[pkey] && _cache[pkey].matches) {
-                       matches = Object.assign({}, _cache[pkey].matches); // shallow copy
+       function displayArea(m2, isImperial) {
+         var locale = _mainLocalizer.localeCode();
+         var d = m2 * (isImperial ? 10.7639111056 : 1);
+         var d1, d2, area;
+         var unit1 = '';
+         var unit2 = '';
 
-                       continue;
-                     }
-                   }
-                 }
-               }
+         if (isImperial) {
+           if (d >= 6969600) {
+             // > 0.25mi² show mi²
+             d1 = d / 27878400;
+             unit1 = 'square_miles';
+           } else {
+             d1 = d;
+             unit1 = 'square_feet';
+           }
 
-               if (_rules[_keys[i]].filter(entity.tags, geometry)) {
-                 matches[_keys[i]] = hasMatch = true;
-               }
-             }
+           if (d > 4356 && d < 43560000) {
+             // 0.1 - 1000 acres
+             d2 = d / 43560;
+             unit2 = 'acres';
+           }
+         } else {
+           if (d >= 250000) {
+             // > 0.25km² show km²
+             d1 = d / 1000000;
+             unit1 = 'square_kilometers';
+           } else {
+             d1 = d;
+             unit1 = 'square_meters';
+           }
 
-             _cache[ent].matches = matches;
+           if (d > 1000 && d < 10000000) {
+             // 0.1 - 1000 hectares
+             d2 = d / 10000;
+             unit2 = 'hectares';
            }
+         }
 
-           return _cache[ent].matches;
-         };
+         area = _t('units.' + unit1, {
+           quantity: d1.toLocaleString(locale, {
+             maximumSignificantDigits: 4
+           })
+         });
 
-         features.getParents = function (entity, resolver, geometry) {
-           if (geometry === 'point') return [];
-           var ent = osmEntity.key(entity);
+         if (d2) {
+           return _t('units.area_pair', {
+             area1: area,
+             area2: _t('units.' + unit2, {
+               quantity: d2.toLocaleString(locale, {
+                 maximumSignificantDigits: 2
+               })
+             })
+           });
+         } else {
+           return area;
+         }
+       }
 
-           if (!_cache[ent]) {
-             _cache[ent] = {};
-           }
+       function wrap(x, min, max) {
+         var d = max - min;
+         return ((x - min) % d + d) % d + min;
+       }
 
-           if (!_cache[ent].parents) {
-             var parents = [];
+       function clamp(x, min, max) {
+         return Math.max(min, Math.min(x, max));
+       }
 
-             if (geometry === 'vertex') {
-               parents = resolver.parentWays(entity);
-             } else {
-               // 'line', 'area', 'relation'
-               parents = resolver.parentRelations(entity);
-             }
+       function displayCoordinate(deg, pos, neg) {
+         var locale = _mainLocalizer.localeCode();
+         var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
+         var sec = (min - Math.floor(min)) * 60;
+         var displayDegrees = _t('units.arcdegrees', {
+           quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
+         });
+         var displayCoordinate;
 
-             _cache[ent].parents = parents;
-           }
+         if (Math.floor(sec) > 0) {
+           displayCoordinate = displayDegrees + _t('units.arcminutes', {
+             quantity: Math.floor(min).toLocaleString(locale)
+           }) + _t('units.arcseconds', {
+             quantity: Math.round(sec).toLocaleString(locale)
+           });
+         } else if (Math.floor(min) > 0) {
+           displayCoordinate = displayDegrees + _t('units.arcminutes', {
+             quantity: Math.round(min).toLocaleString(locale)
+           });
+         } else {
+           displayCoordinate = _t('units.arcdegrees', {
+             quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
+           });
+         }
 
-           return _cache[ent].parents;
-         };
+         if (deg === 0) {
+           return displayCoordinate;
+         } else {
+           return _t('units.coordinate', {
+             coordinate: displayCoordinate,
+             direction: _t('units.' + (deg > 0 ? pos : neg))
+           });
+         }
+       }
+       /**
+        * Returns given coordinate pair in degree-minute-second format.
+        *
+        * @param {Array<Number>} coord longitude and latitude
+        */
 
-         features.isHiddenPreset = function (preset, geometry) {
-           if (!_hidden.length) return false;
-           if (!preset.tags) return false;
-           var test = preset.setTags({}, geometry);
 
-           for (var key in _rules) {
-             if (_rules[key].filter(test, geometry)) {
-               if (_hidden.indexOf(key) !== -1) {
-                 return key;
-               }
+       function dmsCoordinatePair(coord) {
+         return _t('units.coordinate_pair', {
+           latitude: displayCoordinate(clamp(coord[1], -90, 90), 'north', 'south'),
+           longitude: displayCoordinate(wrap(coord[0], -180, 180), 'east', 'west')
+         });
+       }
+       /**
+        * Returns the given coordinate pair in decimal format.
+        * note: unlocalized to avoid comma ambiguity - see #4765
+        *
+        * @param {Array<Number>} coord longitude and latitude
+        */
 
-               return false;
-             }
-           }
+       function decimalCoordinatePair(coord) {
+         return _t('units.coordinate_pair', {
+           latitude: clamp(coord[1], -90, 90).toFixed(OSM_PRECISION),
+           longitude: wrap(coord[0], -180, 180).toFixed(OSM_PRECISION)
+         });
+       }
 
-           return false;
-         };
+       function uiPanelLocation(context) {
+         var currLocation = '';
 
-         features.isHiddenFeature = function (entity, resolver, geometry) {
-           if (!_hidden.length) return false;
-           if (!entity.version) return false;
-           if (_forceVisible[entity.id]) return false;
-           var matches = Object.keys(features.getMatches(entity, resolver, geometry));
-           return matches.length && matches.every(function (k) {
-             return features.hidden(k);
-           });
-         };
+         function redraw(selection) {
+           selection.html('');
+           var list = selection.append('ul'); // Mouse coordinates
 
-         features.isHiddenChild = function (entity, resolver, geometry) {
-           if (!_hidden.length) return false;
-           if (!entity.version || geometry === 'point') return false;
-           if (_forceVisible[entity.id]) return false;
-           var parents = features.getParents(entity, resolver, geometry);
-           if (!parents.length) return false;
+           var coord = context.map().mouseCoordinates();
 
-           for (var i = 0; i < parents.length; i++) {
-             if (!features.isHidden(parents[i], resolver, parents[i].geometry(resolver))) {
-               return false;
-             }
+           if (coord.some(isNaN)) {
+             coord = context.map().center();
            }
 
-           return true;
-         };
+           list.append('li').text(dmsCoordinatePair(coord)).append('li').text(decimalCoordinatePair(coord)); // Location Info
 
-         features.hasHiddenConnections = function (entity, resolver) {
-           if (!_hidden.length) return false;
-           var childNodes, connections;
+           selection.append('div').attr('class', 'location-info').text(currLocation || ' ');
+           debouncedGetLocation(selection, coord);
+         }
 
-           if (entity.type === 'midpoint') {
-             childNodes = [resolver.entity(entity.edge[0]), resolver.entity(entity.edge[1])];
-             connections = [];
-           } else {
-             childNodes = entity.nodes ? resolver.childNodes(entity) : [];
-             connections = features.getParents(entity, resolver, entity.geometry(resolver));
-           } // gather ways connected to child nodes..
+         var debouncedGetLocation = debounce(getLocation, 250);
 
+         function getLocation(selection, coord) {
+           if (!services.geocoder) {
+             currLocation = _t('info_panels.location.unknown_location');
+             selection.selectAll('.location-info').text(currLocation);
+           } else {
+             services.geocoder.reverse(coord, function (err, result) {
+               currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
+               selection.selectAll('.location-info').text(currLocation);
+             });
+           }
+         }
 
-           connections = childNodes.reduce(function (result, e) {
-             return resolver.isShared(e) ? utilArrayUnion(result, resolver.parentWays(e)) : result;
-           }, connections);
-           return connections.some(function (e) {
-             return features.isHidden(e, resolver, e.geometry(resolver));
+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
+             selection.call(redraw);
            });
          };
 
-         features.isHidden = function (entity, resolver, geometry) {
-           if (!_hidden.length) return false;
-           if (!entity.version) return false;
-           var fn = geometry === 'vertex' ? features.isHiddenChild : features.isHiddenFeature;
-           return fn(entity, resolver, geometry);
+         panel.off = function () {
+           context.surface().on('.info-location', null);
          };
 
-         features.filter = function (d, resolver) {
-           if (!_hidden.length) return d;
-           var result = [];
-
-           for (var i = 0; i < d.length; i++) {
-             var entity = d[i];
-
-             if (!features.isHidden(entity, resolver, entity.geometry(resolver))) {
-               result.push(entity);
-             }
-           }
+         panel.id = 'location';
+         panel.label = _t.html('info_panels.location.title');
+         panel.key = _t('info_panels.location.key');
+         return panel;
+       }
 
-           return result;
-         };
+       function uiPanelMeasurement(context) {
+         function radiansToMeters(r) {
+           // using WGS84 authalic radius (6371007.1809 m)
+           return r * 6371007.1809;
+         }
 
-         features.forceVisible = function (entityIDs) {
-           if (!arguments.length) return Object.keys(_forceVisible);
-           _forceVisible = {};
+         function steradiansToSqmeters(r) {
+           // http://gis.stackexchange.com/a/124857/40446
+           return r / (4 * Math.PI) * 510065621724000;
+         }
 
-           for (var i = 0; i < entityIDs.length; i++) {
-             _forceVisible[entityIDs[i]] = true;
-             var entity = context.hasEntity(entityIDs[i]);
+         function toLineString(feature) {
+           if (feature.type === 'LineString') return feature;
+           var result = {
+             type: 'LineString',
+             coordinates: []
+           };
 
-             if (entity && entity.type === 'relation') {
-               // also show relation members (one level deep)
-               for (var j in entity.members) {
-                 _forceVisible[entity.members[j].id] = true;
-               }
-             }
+           if (feature.type === 'Polygon') {
+             result.coordinates = feature.coordinates[0];
+           } else if (feature.type === 'MultiPolygon') {
+             result.coordinates = feature.coordinates[0][0];
            }
 
-           return features;
-         };
-
-         features.init = function () {
-           var storage = corePreferences('disabled-features');
+           return result;
+         }
 
-           if (storage) {
-             var storageDisabled = storage.replace(/;/g, ',').split(',');
-             storageDisabled.forEach(features.disable);
-           }
+         var _isImperial = !_mainLocalizer.usesMetric();
 
-           var hash = utilStringQs(window.location.hash);
+         function redraw(selection) {
+           var graph = context.graph();
+           var selectedNoteID = context.selectedNoteID();
+           var osm = services.osm;
+           var localeCode = _mainLocalizer.localeCode();
+           var heading;
+           var center, location, centroid;
+           var closed, geometry;
+           var totalNodeCount,
+               length = 0,
+               area = 0,
+               distance;
 
-           if (hash.disable_features) {
-             var hashDisabled = hash.disable_features.replace(/;/g, ',').split(',');
-             hashDisabled.forEach(features.disable);
-           }
-         }; // warm up the feature matching cache upon merging fetched data
+           if (selectedNoteID && osm) {
+             // selected 1 note
+             var note = osm.getNote(selectedNoteID);
+             heading = _t.html('note.note') + ' ' + selectedNoteID;
+             location = note.loc;
+             geometry = 'note';
+           } else {
+             // selected 1..n entities
+             var selectedIDs = context.selectedIDs().filter(function (id) {
+               return context.hasEntity(id);
+             });
+             var selected = selectedIDs.map(function (id) {
+               return context.entity(id);
+             });
+             heading = selected.length === 1 ? selected[0].id : _t.html('info_panels.selected', {
+               n: selected.length
+             });
 
+             if (selected.length) {
+               var extent = geoExtent();
 
-         context.history().on('merge.features', function (newEntities) {
-           if (!newEntities) return;
-           var handle = window.requestIdleCallback(function () {
-             var graph = context.graph();
-             var types = utilArrayGroupBy(newEntities, 'type'); // ensure that getMatches is called on relations before ways
+               for (var i in selected) {
+                 var entity = selected[i];
 
-             var entities = [].concat(types.relation || [], types.way || [], types.node || []);
+                 extent._extend(entity.extent(graph));
 
-             for (var i = 0; i < entities.length; i++) {
-               var geometry = entities[i].geometry(graph);
-               features.getMatches(entities[i], graph, geometry);
-             }
-           });
+                 geometry = entity.geometry(graph);
 
-           _deferred.add(handle);
-         });
-         return features;
-       }
+                 if (geometry === 'line' || geometry === 'area') {
+                   closed = entity.type === 'relation' || entity.isClosed() && !entity.isDegenerate();
+                   var feature = entity.asGeoJSON(graph);
+                   length += radiansToMeters(d3_geoLength(toLineString(feature)));
+                   centroid = d3_geoPath(context.projection).centroid(entity.asGeoJSON(graph));
+                   centroid = centroid && context.projection.invert(centroid);
 
-       //
-       // - the activeID - nope
-       // - 1 away (adjacent) to the activeID - yes (vertices will be merged)
-       // - 2 away from the activeID - nope (would create a self intersecting segment)
-       // - all others on a linear way - yes
-       // - all others on a closed way - nope (would create a self intersecting polygon)
-       //
-       // returns
-       // 0 = active vertex - no touch/connect
-       // 1 = passive vertex - yes touch/connect
-       // 2 = adjacent vertex - yes but pay attention segmenting a line here
-       //
+                   if (!centroid || !isFinite(centroid[0]) || !isFinite(centroid[1])) {
+                     centroid = entity.extent(graph).center();
+                   }
 
-       function svgPassiveVertex(node, graph, activeID) {
-         if (!activeID) return 1;
-         if (activeID === node.id) return 0;
-         var parents = graph.parentWays(node);
-         var i, j, nodes, isClosed, ix1, ix2, ix3, ix4, max;
+                   if (closed) {
+                     area += steradiansToSqmeters(entity.area(graph));
+                   }
+                 }
+               }
 
-         for (i = 0; i < parents.length; i++) {
-           nodes = parents[i].nodes;
-           isClosed = parents[i].isClosed();
+               if (selected.length > 1) {
+                 geometry = null;
+                 closed = null;
+                 centroid = null;
+               }
 
-           for (j = 0; j < nodes.length; j++) {
-             // find this vertex, look nearby
-             if (nodes[j] === node.id) {
-               ix1 = j - 2;
-               ix2 = j - 1;
-               ix3 = j + 1;
-               ix4 = j + 2;
+               if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
+                 distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
+               }
 
-               if (isClosed) {
-                 // wraparound if needed
-                 max = nodes.length - 1;
-                 if (ix1 < 0) ix1 = max + ix1;
-                 if (ix2 < 0) ix2 = max + ix2;
-                 if (ix3 > max) ix3 = ix3 - max;
-                 if (ix4 > max) ix4 = ix4 - max;
+               if (selected.length === 1 && selected[0].type === 'node') {
+                 location = selected[0].loc;
+               } else {
+                 totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
                }
 
-               if (nodes[ix1] === activeID) return 0; // no - prevent self intersect
-               else if (nodes[ix2] === activeID) return 2; // ok - adjacent
-                 else if (nodes[ix3] === activeID) return 2; // ok - adjacent
-                   else if (nodes[ix4] === activeID) return 0; // no - prevent self intersect
-                     else if (isClosed && nodes.indexOf(activeID) !== -1) return 0; // no - prevent self intersect
+               if (!location && !centroid) {
+                 center = extent.center();
+               }
              }
            }
-         }
 
-         return 1; // ok
-       }
-       function svgMarkerSegments(projection, graph, dt, shouldReverse, bothDirections) {
-         return function (entity) {
-           var i = 0;
-           var offset = dt;
-           var segments = [];
-           var clip = d3_geoIdentity().clipExtent(projection.clipExtent()).stream;
-           var coordinates = graph.childNodes(entity).map(function (n) {
-             return n.loc;
-           });
-           var a, b;
+           selection.html('');
 
-           if (shouldReverse(entity)) {
-             coordinates.reverse();
+           if (heading) {
+             selection.append('h4').attr('class', 'measurement-heading').html(heading);
            }
 
-           d3_geoStream({
-             type: 'LineString',
-             coordinates: coordinates
-           }, projection.stream(clip({
-             lineStart: function lineStart() {},
-             lineEnd: function lineEnd() {
-               a = null;
-             },
-             point: function point(x, y) {
-               b = [x, y];
-
-               if (a) {
-                 var span = geoVecLength(a, b) - offset;
-
-                 if (span >= 0) {
-                   var heading = geoVecAngle(a, b);
-                   var dx = dt * Math.cos(heading);
-                   var dy = dt * Math.sin(heading);
-                   var p = [a[0] + offset * Math.cos(heading), a[1] + offset * Math.sin(heading)]; // gather coordinates
-
-                   var coord = [a, p];
-
-                   for (span -= dt; span >= 0; span -= dt) {
-                     p = geoVecAdd(p, [dx, dy]);
-                     coord.push(p);
-                   }
-
-                   coord.push(b); // generate svg paths
-
-                   var segment = '';
-                   var j;
+           var list = selection.append('ul');
+           var coordItem;
 
-                   for (j = 0; j < coord.length; j++) {
-                     segment += (j === 0 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-                   }
+           if (geometry) {
+             list.append('li').call(_t.append('info_panels.measurement.geometry', {
+               suffix: ':'
+             })).append('span').html(closed ? _t.html('info_panels.measurement.closed_' + geometry) : _t.html('geometry.' + geometry));
+           }
 
-                   segments.push({
-                     id: entity.id,
-                     index: i++,
-                     d: segment
-                   });
+           if (totalNodeCount) {
+             list.append('li').call(_t.append('info_panels.measurement.node_count', {
+               suffix: ':'
+             })).append('span').text(totalNodeCount.toLocaleString(localeCode));
+           }
 
-                   if (bothDirections(entity)) {
-                     segment = '';
+           if (area) {
+             list.append('li').call(_t.append('info_panels.measurement.area', {
+               suffix: ':'
+             })).append('span').text(displayArea(area, _isImperial));
+           }
 
-                     for (j = coord.length - 1; j >= 0; j--) {
-                       segment += (j === coord.length - 1 ? 'M' : 'L') + coord[j][0] + ',' + coord[j][1];
-                     }
+           if (length) {
+             list.append('li').call(_t.append('info_panels.measurement.' + (closed ? 'perimeter' : 'length'), {
+               suffix: ':'
+             })).append('span').text(displayLength(length, _isImperial));
+           }
 
-                     segments.push({
-                       id: entity.id,
-                       index: i++,
-                       d: segment
-                     });
-                   }
-                 }
+           if (typeof distance === 'number') {
+             list.append('li').call(_t.append('info_panels.measurement.distance', {
+               suffix: ':'
+             })).append('span').text(displayLength(distance, _isImperial));
+           }
 
-                 offset = -span;
-               }
+           if (location) {
+             coordItem = list.append('li').call(_t.append('info_panels.measurement.location', {
+               suffix: ':'
+             }));
+             coordItem.append('span').text(dmsCoordinatePair(location));
+             coordItem.append('span').text(decimalCoordinatePair(location));
+           }
 
-               a = b;
-             }
-           })));
-           return segments;
-         };
-       }
-       function svgPath(projection, graph, isArea) {
-         // Explanation of magic numbers:
-         // "padding" here allows space for strokes to extend beyond the viewport,
-         // so that the stroke isn't drawn along the edge of the viewport when
-         // the shape is clipped.
-         //
-         // When drawing lines, pad viewport by 5px.
-         // When drawing areas, pad viewport by 65px in each direction to allow
-         // for 60px area fill stroke (see ".fill-partial path.fill" css rule)
-         var cache = {};
-         var padding = isArea ? 65 : 5;
-         var viewport = projection.clipExtent();
-         var paddedExtent = [[viewport[0][0] - padding, viewport[0][1] - padding], [viewport[1][0] + padding, viewport[1][1] + padding]];
-         var clip = d3_geoIdentity().clipExtent(paddedExtent).stream;
-         var project = projection.stream;
-         var path = d3_geoPath().projection({
-           stream: function stream(output) {
-             return project(clip(output));
+           if (centroid) {
+             coordItem = list.append('li').call(_t.append('info_panels.measurement.centroid', {
+               suffix: ':'
+             }));
+             coordItem.append('span').text(dmsCoordinatePair(centroid));
+             coordItem.append('span').text(decimalCoordinatePair(centroid));
            }
-         });
 
-         var svgpath = function svgpath(entity) {
-           if (entity.id in cache) {
-             return cache[entity.id];
-           } else {
-             return cache[entity.id] = path(entity.asGeoJSON(graph));
+           if (center) {
+             coordItem = list.append('li').call(_t.append('info_panels.measurement.center', {
+               suffix: ':'
+             }));
+             coordItem.append('span').text(dmsCoordinatePair(center));
+             coordItem.append('span').text(decimalCoordinatePair(center));
            }
-         };
 
-         svgpath.geojson = function (d) {
-           if (d.__featurehash__ !== undefined) {
-             if (d.__featurehash__ in cache) {
-               return cache[d.__featurehash__];
-             } else {
-               return cache[d.__featurehash__] = path(d);
-             }
-           } else {
-             return path(d);
+           if (length || area || typeof distance === 'number') {
+             var toggle = _isImperial ? 'imperial' : 'metric';
+             selection.append('a').call(_t.append('info_panels.measurement.' + toggle)).attr('href', '#').attr('class', 'button button-toggle-units').on('click', function (d3_event) {
+               d3_event.preventDefault();
+               _isImperial = !_isImperial;
+               selection.call(redraw);
+             });
            }
-         };
+         }
 
-         return svgpath;
-       }
-       function svgPointTransform(projection) {
-         var svgpoint = function svgpoint(entity) {
-           // http://jsperf.com/short-array-join
-           var pt = projection(entity.loc);
-           return 'translate(' + pt[0] + ',' + pt[1] + ')';
+         var panel = function panel(selection) {
+           selection.call(redraw);
+           context.map().on('drawn.info-measurement', function () {
+             selection.call(redraw);
+           });
+           context.on('enter.info-measurement', function () {
+             selection.call(redraw);
+           });
          };
 
-         svgpoint.geojson = function (d) {
-           return svgpoint(d.properties.entity);
+         panel.off = function () {
+           context.map().on('drawn.info-measurement', null);
+           context.on('enter.info-measurement', null);
          };
 
-         return svgpoint;
+         panel.id = 'measurement';
+         panel.label = _t.html('info_panels.measurement.title');
+         panel.key = _t('info_panels.measurement.key');
+         return panel;
        }
-       function svgRelationMemberTags(graph) {
-         return function (entity) {
-           var tags = entity.tags;
-           var shouldCopyMultipolygonTags = !entity.hasInterestingTags();
-           graph.parentRelations(entity).forEach(function (relation) {
-             var type = relation.tags.type;
 
-             if (type === 'multipolygon' && shouldCopyMultipolygonTags || type === 'boundary') {
-               tags = Object.assign({}, relation.tags, tags);
-             }
-           });
-           return tags;
-         };
-       }
-       function svgSegmentWay(way, graph, activeID) {
-         // When there is no activeID, we can memoize this expensive computation
-         if (activeID === undefined) {
-           return graph["transient"](way, 'waySegments', getWaySegments);
-         } else {
-           return getWaySegments();
-         }
+       var uiInfoPanels = {
+         background: uiPanelBackground,
+         history: uiPanelHistory,
+         location: uiPanelLocation,
+         measurement: uiPanelMeasurement
+       };
 
-         function getWaySegments() {
-           var isActiveWay = way.nodes.indexOf(activeID) !== -1;
-           var features = {
-             passive: [],
-             active: []
-           };
-           var start = {};
-           var end = {};
-           var node, type;
+       function uiInfo(context) {
+         var ids = Object.keys(uiInfoPanels);
+         var wasActive = ['measurement'];
+         var panels = {};
+         var active = {}; // create panels
 
-           for (var i = 0; i < way.nodes.length; i++) {
-             node = graph.entity(way.nodes[i]);
-             type = svgPassiveVertex(node, graph, activeID);
-             end = {
-               node: node,
-               type: type
-             };
+         ids.forEach(function (k) {
+           if (!panels[k]) {
+             panels[k] = uiInfoPanels[k](context);
+             active[k] = false;
+           }
+         });
+
+         function info(selection) {
+           function redraw() {
+             var activeids = ids.filter(function (k) {
+               return active[k];
+             }).sort();
+             var containers = infoPanels.selectAll('.panel-container').data(activeids, function (k) {
+               return k;
+             });
+             containers.exit().style('opacity', 1).transition().duration(200).style('opacity', 0).on('end', function (d) {
+               select(this).call(panels[d].off).remove();
+             });
+             var enter = containers.enter().append('div').attr('class', function (d) {
+               return 'fillD2 panel-container panel-container-' + d;
+             });
+             enter.style('opacity', 0).transition().duration(200).style('opacity', 1);
+             var title = enter.append('div').attr('class', 'panel-title fillD2');
+             title.append('h3').html(function (d) {
+               return panels[d].label;
+             });
+             title.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function (d3_event, d) {
+               d3_event.stopImmediatePropagation();
+               d3_event.preventDefault();
+               info.toggle(d);
+             }).call(svgIcon('#iD-icon-close'));
+             enter.append('div').attr('class', function (d) {
+               return 'panel-content panel-content-' + d;
+             }); // redraw the panels
+
+             infoPanels.selectAll('.panel-content').each(function (d) {
+               select(this).call(panels[d]);
+             });
+           }
+
+           info.toggle = function (which) {
+             var activeids = ids.filter(function (k) {
+               return active[k];
+             });
+
+             if (which) {
+               // toggle one
+               active[which] = !active[which];
+
+               if (activeids.length === 1 && activeids[0] === which) {
+                 // none active anymore
+                 wasActive = [which];
+               }
 
-             if (start.type !== undefined) {
-               if (start.node.id === activeID || end.node.id === activeID) ; else if (isActiveWay && (start.type === 2 || end.type === 2)) {
-                 // one adjacent vertex
-                 pushActive(start, end, i);
-               } else if (start.type === 0 && end.type === 0) {
-                 // both active vertices
-                 pushActive(start, end, i);
+               context.container().select('.' + which + '-panel-toggle-item').classed('active', active[which]).select('input').property('checked', active[which]);
+             } else {
+               // toggle all
+               if (activeids.length) {
+                 wasActive = activeids;
+                 activeids.forEach(function (k) {
+                   active[k] = false;
+                 });
                } else {
-                 pushPassive(start, end, i);
+                 wasActive.forEach(function (k) {
+                   active[k] = true;
+                 });
                }
              }
 
-             start = end;
-           }
-
-           return features;
+             redraw();
+           };
 
-           function pushActive(start, end, index) {
-             features.active.push({
-               type: 'Feature',
-               id: way.id + '-' + index + '-nope',
-               properties: {
-                 nope: true,
-                 target: true,
-                 entity: way,
-                 nodes: [start.node, end.node],
-                 index: index
-               },
-               geometry: {
-                 type: 'LineString',
-                 coordinates: [start.node.loc, end.node.loc]
-               }
+           var infoPanels = selection.selectAll('.info-panels').data([0]);
+           infoPanels = infoPanels.enter().append('div').attr('class', 'info-panels').merge(infoPanels);
+           redraw();
+           context.keybinding().on(uiCmd('⌘' + _t('info_panels.key')), function (d3_event) {
+             d3_event.stopImmediatePropagation();
+             d3_event.preventDefault();
+             info.toggle();
+           });
+           ids.forEach(function (k) {
+             var key = _t('info_panels.' + k + '.key', {
+               "default": null
              });
-           }
-
-           function pushPassive(start, end, index) {
-             features.passive.push({
-               type: 'Feature',
-               id: way.id + '-' + index,
-               properties: {
-                 target: true,
-                 entity: way,
-                 nodes: [start.node, end.node],
-                 index: index
-               },
-               geometry: {
-                 type: 'LineString',
-                 coordinates: [start.node.loc, end.node.loc]
-               }
+             if (!key) return;
+             context.keybinding().on(uiCmd('⌘⇧' + key), function (d3_event) {
+               d3_event.stopImmediatePropagation();
+               d3_event.preventDefault();
+               info.toggle(k);
              });
-           }
+           });
          }
+
+         return info;
        }
 
-       function svgTagClasses() {
-         var primaries = ['building', 'highway', 'railway', 'waterway', 'aeroway', 'aerialway', 'piste:type', 'boundary', 'power', 'amenity', 'natural', 'landuse', 'leisure', 'military', 'place', 'man_made', 'route', 'attraction', 'building:part', 'indoor'];
-         var statuses = [// nonexistent, might be built
-         'proposed', 'planned', // under maintentance or between groundbreaking and opening
-         'construction', // existent but not functional
-         'disused', // dilapidated to nonexistent
-         'abandoned', // nonexistent, still may appear in imagery
-         'dismantled', 'razed', 'demolished', 'obliterated', // existent occasionally, e.g. stormwater drainage basin
-         'intermittent'];
-         var secondaries = ['oneway', 'bridge', 'tunnel', 'embankment', 'cutting', 'barrier', 'surface', 'tracktype', 'footway', 'crossing', 'service', 'sport', 'public_transport', 'location', 'parking', 'golf', 'type', 'leisure', 'man_made', 'indoor'];
+       function pointBox(loc, context) {
+         var rect = context.surfaceRect();
+         var point = context.curtainProjection(loc);
+         return {
+           left: point[0] + rect.left - 40,
+           top: point[1] + rect.top - 60,
+           width: 80,
+           height: 90
+         };
+       }
+       function pad(locOrBox, padding, context) {
+         var box;
 
-         var _tags = function _tags(entity) {
-           return entity.tags;
+         if (locOrBox instanceof Array) {
+           var rect = context.surfaceRect();
+           var point = context.curtainProjection(locOrBox);
+           box = {
+             left: point[0] + rect.left,
+             top: point[1] + rect.top
+           };
+         } else {
+           box = locOrBox;
+         }
+
+         return {
+           left: box.left - padding,
+           top: box.top - padding,
+           width: (box.width || 0) + 2 * padding,
+           height: (box.width || 0) + 2 * padding
          };
+       }
+       function icon(name, svgklass, useklass) {
+         return '<svg class="icon ' + (svgklass || '') + '">' + '<use xlink:href="' + name + '"' + (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
+       }
+       var helpStringReplacements; // Returns the localized HTML element for `id` with a standardized set of icon, key, and
+       // label replacements suitable for tutorials and documentation. Optionally supplemented
+       // with custom `replacements`
 
-         var tagClasses = function tagClasses(selection) {
-           selection.each(function tagClassesEach(entity) {
-             var value = this.className;
+       function helpHtml(id, replacements) {
+         // only load these the first time
+         if (!helpStringReplacements) {
+           helpStringReplacements = {
+             // insert icons corresponding to various UI elements
+             point_icon: icon('#iD-icon-point', 'inline'),
+             line_icon: icon('#iD-icon-line', 'inline'),
+             area_icon: icon('#iD-icon-area', 'inline'),
+             note_icon: icon('#iD-icon-note', 'inline add-note'),
+             plus: icon('#iD-icon-plus', 'inline'),
+             minus: icon('#iD-icon-minus', 'inline'),
+             layers_icon: icon('#iD-icon-layers', 'inline'),
+             data_icon: icon('#iD-icon-data', 'inline'),
+             inspect: icon('#iD-icon-inspect', 'inline'),
+             help_icon: icon('#iD-icon-help', 'inline'),
+             undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'inline'),
+             redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'inline'),
+             save_icon: icon('#iD-icon-save', 'inline'),
+             // operation icons
+             circularize_icon: icon('#iD-operation-circularize', 'inline operation'),
+             continue_icon: icon('#iD-operation-continue', 'inline operation'),
+             copy_icon: icon('#iD-operation-copy', 'inline operation'),
+             delete_icon: icon('#iD-operation-delete', 'inline operation'),
+             disconnect_icon: icon('#iD-operation-disconnect', 'inline operation'),
+             downgrade_icon: icon('#iD-operation-downgrade', 'inline operation'),
+             extract_icon: icon('#iD-operation-extract', 'inline operation'),
+             merge_icon: icon('#iD-operation-merge', 'inline operation'),
+             move_icon: icon('#iD-operation-move', 'inline operation'),
+             orthogonalize_icon: icon('#iD-operation-orthogonalize', 'inline operation'),
+             paste_icon: icon('#iD-operation-paste', 'inline operation'),
+             reflect_long_icon: icon('#iD-operation-reflect-long', 'inline operation'),
+             reflect_short_icon: icon('#iD-operation-reflect-short', 'inline operation'),
+             reverse_icon: icon('#iD-operation-reverse', 'inline operation'),
+             rotate_icon: icon('#iD-operation-rotate', 'inline operation'),
+             split_icon: icon('#iD-operation-split', 'inline operation'),
+             straighten_icon: icon('#iD-operation-straighten', 'inline operation'),
+             // interaction icons
+             leftclick: icon('#iD-walkthrough-mouse-left', 'inline operation'),
+             rightclick: icon('#iD-walkthrough-mouse-right', 'inline operation'),
+             mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'inline operation'),
+             tap_icon: icon('#iD-walkthrough-tap', 'inline operation'),
+             doubletap_icon: icon('#iD-walkthrough-doubletap', 'inline operation'),
+             longpress_icon: icon('#iD-walkthrough-longpress', 'inline operation'),
+             touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'inline operation'),
+             pinch_icon: icon('#iD-walkthrough-pinch-apart', 'inline operation'),
+             // insert keys; may be localized and platform-dependent
+             shift: uiCmd.display('⇧'),
+             alt: uiCmd.display('⌥'),
+             "return": uiCmd.display('↵'),
+             esc: _t.html('shortcuts.key.esc'),
+             space: _t.html('shortcuts.key.space'),
+             add_note_key: _t.html('modes.add_note.key'),
+             help_key: _t.html('help.key'),
+             shortcuts_key: _t.html('shortcuts.toggle.key'),
+             // reference localized UI labels directly so that they'll always match
+             save: _t.html('save.title'),
+             undo: _t.html('undo.title'),
+             redo: _t.html('redo.title'),
+             upload: _t.html('commit.save'),
+             point: _t.html('modes.add_point.title'),
+             line: _t.html('modes.add_line.title'),
+             area: _t.html('modes.add_area.title'),
+             note: _t.html('modes.add_note.label'),
+             circularize: _t.html('operations.circularize.title'),
+             "continue": _t.html('operations.continue.title'),
+             copy: _t.html('operations.copy.title'),
+             "delete": _t.html('operations.delete.title'),
+             disconnect: _t.html('operations.disconnect.title'),
+             downgrade: _t.html('operations.downgrade.title'),
+             extract: _t.html('operations.extract.title'),
+             merge: _t.html('operations.merge.title'),
+             move: _t.html('operations.move.title'),
+             orthogonalize: _t.html('operations.orthogonalize.title'),
+             paste: _t.html('operations.paste.title'),
+             reflect_long: _t.html('operations.reflect.title.long'),
+             reflect_short: _t.html('operations.reflect.title.short'),
+             reverse: _t.html('operations.reverse.title'),
+             rotate: _t.html('operations.rotate.title'),
+             split: _t.html('operations.split.title'),
+             straighten: _t.html('operations.straighten.title'),
+             map_data: _t.html('map_data.title'),
+             osm_notes: _t.html('map_data.layers.notes.title'),
+             fields: _t.html('inspector.fields'),
+             tags: _t.html('inspector.tags'),
+             relations: _t.html('inspector.relations'),
+             new_relation: _t.html('inspector.new_relation'),
+             turn_restrictions: _t.html('_tagging.presets.fields.restrictions.label'),
+             background_settings: _t.html('background.description'),
+             imagery_offset: _t.html('background.fix_misalignment'),
+             start_the_walkthrough: _t.html('splash.walkthrough'),
+             help: _t.html('help.title'),
+             ok: _t.html('intro.ok')
+           };
 
-             if (value.baseVal !== undefined) {
-               value = value.baseVal;
-             }
+           for (var key in helpStringReplacements) {
+             helpStringReplacements[key] = {
+               html: helpStringReplacements[key]
+             };
+           }
+         }
 
-             var t = _tags(entity);
+         var reps;
 
-             var computed = tagClasses.getClassesString(t, value);
+         if (replacements) {
+           reps = Object.assign(replacements, helpStringReplacements);
+         } else {
+           reps = helpStringReplacements;
+         }
 
-             if (computed !== value) {
-               select(this).attr('class', computed);
-             }
-           });
-         };
+         return _t.html(id, reps) // use keyboard key styling for shortcuts
+         .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+       }
 
-         tagClasses.getClassesString = function (t, value) {
-           var primary, status;
-           var i, j, k, v; // in some situations we want to render perimeter strokes a certain way
+       function slugify(text) {
+         return text.toString().toLowerCase().replace(/\s+/g, '-') // Replace spaces with -
+         .replace(/[^\w\-]+/g, '') // Remove all non-word chars
+         .replace(/\-\-+/g, '-') // Replace multiple - with single -
+         .replace(/^-+/, '') // Trim - from start of text
+         .replace(/-+$/, ''); // Trim - from end of text
+       } // console warning for missing walkthrough names
 
-           var overrideGeometry;
 
-           if (/\bstroke\b/.test(value)) {
-             if (!!t.barrier && t.barrier !== 'no') {
-               overrideGeometry = 'line';
-             }
-           } // preserve base classes (nothing with `tag-`)
+       var missingStrings = {};
 
+       function checkKey(key, text) {
+         if (_t(key, {
+           "default": undefined
+         }) === undefined) {
+           if (missingStrings.hasOwnProperty(key)) return; // warn once
 
-           var classes = value.trim().split(/\s+/).filter(function (klass) {
-             return klass.length && !/^tag-/.test(klass);
-           }).map(function (klass) {
-             // special overrides for some perimeter strokes
-             return klass === 'line' || klass === 'area' ? overrideGeometry || klass : klass;
-           }); // pick at most one primary classification tag..
+           missingStrings[key] = text;
+           var missing = key + ': ' + text;
+           if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
+         }
+       }
 
-           for (i = 0; i < primaries.length; i++) {
-             k = primaries[i];
-             v = t[k];
-             if (!v || v === 'no') continue;
+       function localize(obj) {
+         var key; // Assign name if entity has one..
 
-             if (k === 'piste:type') {
-               // avoid a ':' in the class name
-               k = 'piste';
-             } else if (k === 'building:part') {
-               // avoid a ':' in the class name
-               k = 'building_part';
-             }
+         var name = obj.tags && obj.tags.name;
 
-             primary = k;
+         if (name) {
+           key = 'intro.graph.name.' + slugify(name);
+           obj.tags.name = _t(key, {
+             "default": name
+           });
+           checkKey(key, name);
+         } // Assign street name if entity has one..
 
-             if (statuses.indexOf(v) !== -1) {
-               // e.g. `railway=abandoned`
-               status = v;
-               classes.push('tag-' + k);
-             } else {
-               classes.push('tag-' + k);
-               classes.push('tag-' + k + '-' + v);
-             }
 
-             break;
-           }
+         var street = obj.tags && obj.tags['addr:street'];
 
-           if (!primary) {
-             for (i = 0; i < statuses.length; i++) {
-               for (j = 0; j < primaries.length; j++) {
-                 k = statuses[i] + ':' + primaries[j]; // e.g. `demolished:building=yes`
+         if (street) {
+           key = 'intro.graph.name.' + slugify(street);
+           obj.tags['addr:street'] = _t(key, {
+             "default": street
+           });
+           checkKey(key, street); // Add address details common across walkthrough..
 
-                 v = t[k];
-                 if (!v || v === 'no') continue;
-                 status = statuses[i];
-                 break;
+           var addrTags = ['block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood', 'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'];
+           addrTags.forEach(function (k) {
+             var key = 'intro.graph.' + k;
+             var tag = 'addr:' + k;
+             var val = obj.tags && obj.tags[tag];
+             var str = _t(key, {
+               "default": val
+             });
+
+             if (str) {
+               if (str.match(/^<.*>$/) !== null) {
+                 delete obj.tags[tag];
+               } else {
+                 obj.tags[tag] = str;
                }
              }
-           } // add at most one status tag, only if relates to primary tag..
+           });
+         }
 
+         return obj;
+       } // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
 
-           if (!status) {
-             for (i = 0; i < statuses.length; i++) {
-               k = statuses[i];
-               v = t[k];
-               if (!v || v === 'no') continue;
+       function isMostlySquare(points) {
+         // note: uses 15 here instead of the 12 from actionOrthogonalize because
+         // actionOrthogonalize can actually straighten some larger angles as it iterates
+         var threshold = 15; // degrees within right or straight
 
-               if (v === 'yes') {
-                 // e.g. `railway=rail + abandoned=yes`
-                 status = k;
-               } else if (primary && primary === v) {
-                 // e.g. `railway=rail + abandoned=railway`
-                 status = k;
-               } else if (!primary && primaries.indexOf(v) !== -1) {
-                 // e.g. `abandoned=railway`
-                 status = k;
-                 primary = v;
-                 classes.push('tag-' + v);
-               } // else ignore e.g.  `highway=path + abandoned=railway`
+         var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
 
+         var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
 
-               if (status) break;
-             }
-           }
+         for (var i = 0; i < points.length; i++) {
+           var a = points[(i - 1 + points.length) % points.length];
+           var origin = points[i];
+           var b = points[(i + 1) % points.length];
+           var dotp = geoVecNormalizedDot(a, b, origin);
+           var mag = Math.abs(dotp);
 
-           if (status) {
-             classes.push('tag-status');
-             classes.push('tag-status-' + status);
-           } // add any secondary tags
+           if (mag > lowerBound && mag < upperBound) {
+             return false;
+           }
+         }
 
+         return true;
+       }
+       function selectMenuItem(context, operation) {
+         return context.container().select('.edit-menu .edit-menu-item-' + operation);
+       }
+       function transitionTime(point1, point2) {
+         var distance = geoSphericalDistance(point1, point2);
 
-           for (i = 0; i < secondaries.length; i++) {
-             k = secondaries[i];
-             v = t[k];
-             if (!v || v === 'no' || k === primary) continue;
-             classes.push('tag-' + k);
-             classes.push('tag-' + k + '-' + v);
-           } // For highways, look for surface tagging..
+         if (distance === 0) {
+           return 0;
+         } else if (distance < 80) {
+           return 500;
+         } else {
+           return 1000;
+         }
+       }
 
+       // hide class, which sets display=none, and a d3 transition for opacity.
+       // this will cause blinking when called repeatedly, so check that the
+       // value actually changes between calls.
 
-           if (primary === 'highway' && !osmPathHighwayTagValues[t.highway] || primary === 'aeroway') {
-             var surface = t.highway === 'track' ? 'unpaved' : 'paved';
+       function uiToggle(show, callback) {
+         return function (selection) {
+           selection.style('opacity', show ? 0 : 1).classed('hide', false).transition().style('opacity', show ? 1 : 0).on('end', function () {
+             select(this).classed('hide', !show).style('opacity', null);
+             if (callback) callback.apply(this);
+           });
+         };
+       }
 
-             for (k in t) {
-               v = t[k];
+       function uiCurtain(containerNode) {
+         var surface = select(null),
+             tooltip = select(null),
+             darkness = select(null);
 
-               if (k in osmPavedTags) {
-                 surface = osmPavedTags[k][v] ? 'paved' : 'unpaved';
-               }
+         function curtain(selection) {
+           surface = selection.append('svg').attr('class', 'curtain').style('top', 0).style('left', 0);
+           darkness = surface.append('path').attr('x', 0).attr('y', 0).attr('class', 'curtain-darkness');
+           select(window).on('resize.curtain', resize);
+           tooltip = selection.append('div').attr('class', 'tooltip');
+           tooltip.append('div').attr('class', 'popover-arrow');
+           tooltip.append('div').attr('class', 'popover-inner');
+           resize();
 
-               if (k in osmSemipavedTags && !!osmSemipavedTags[k][v]) {
-                 surface = 'semipaved';
-               }
-             }
+           function resize() {
+             surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
+             curtain.cut(darkness.datum());
+           }
+         }
+         /**
+          * Reveal cuts the curtain to highlight the given box,
+          * and shows a tooltip with instructions next to the box.
+          *
+          * @param  {String|ClientRect} [box]   box used to cut the curtain
+          * @param  {String}    [text]          text for a tooltip
+          * @param  {Object}    [options]
+          * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
+          * @param  {integer}   [options.duration]        transition time in milliseconds
+          * @param  {string}    [options.buttonText]      if set, create a button with this text label
+          * @param  {function}  [options.buttonCallback]  if set, the callback for the button
+          * @param  {function}  [options.padding]         extra margin in px to put around bbox
+          * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
+          */
 
-             classes.push('tag-' + surface);
-           } // If this is a wikidata-tagged item, add a class for that..
 
+         curtain.reveal = function (box, html, options) {
+           options = options || {};
 
-           if (t.wikidata || t['brand:wikidata']) {
-             classes.push('tag-wikidata');
+           if (typeof box === 'string') {
+             box = select(box).node();
            }
 
-           return classes.join(' ').trim();
-         };
-
-         tagClasses.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val;
-           return tagClasses;
-         };
-
-         return tagClasses;
-       }
+           if (box && box.getBoundingClientRect) {
+             box = copyBox(box.getBoundingClientRect());
+             var containerRect = containerNode.getBoundingClientRect();
+             box.top -= containerRect.top;
+             box.left -= containerRect.left;
+           }
 
-       // Patterns only work in Firefox when set directly on element.
-       // (This is not a bug: https://bugzilla.mozilla.org/show_bug.cgi?id=750632)
-       var patterns = {
-         // tag - pattern name
-         // -or-
-         // tag - value - pattern name
-         // -or-
-         // tag - value - rules (optional tag-values, pattern name)
-         // (matches earlier rules first, so fallback should be last entry)
-         amenity: {
-           grave_yard: 'cemetery',
-           fountain: 'water_standing'
-         },
-         landuse: {
-           cemetery: [{
-             religion: 'christian',
-             pattern: 'cemetery_christian'
-           }, {
-             religion: 'buddhist',
-             pattern: 'cemetery_buddhist'
-           }, {
-             religion: 'muslim',
-             pattern: 'cemetery_muslim'
-           }, {
-             religion: 'jewish',
-             pattern: 'cemetery_jewish'
-           }, {
-             pattern: 'cemetery'
-           }],
-           construction: 'construction',
-           farmland: 'farmland',
-           farmyard: 'farmyard',
-           forest: [{
-             leaf_type: 'broadleaved',
-             pattern: 'forest_broadleaved'
-           }, {
-             leaf_type: 'needleleaved',
-             pattern: 'forest_needleleaved'
-           }, {
-             leaf_type: 'leafless',
-             pattern: 'forest_leafless'
-           }, {
-             pattern: 'forest'
-           } // same as 'leaf_type:mixed'
-           ],
-           grave_yard: 'cemetery',
-           grass: [{
-             golf: 'green',
-             pattern: 'golf_green'
-           }, {
-             pattern: 'grass'
-           }],
-           landfill: 'landfill',
-           meadow: 'meadow',
-           military: 'construction',
-           orchard: 'orchard',
-           quarry: 'quarry',
-           vineyard: 'vineyard'
-         },
-         natural: {
-           beach: 'beach',
-           grassland: 'grass',
-           sand: 'beach',
-           scrub: 'scrub',
-           water: [{
-             water: 'pond',
-             pattern: 'pond'
-           }, {
-             water: 'reservoir',
-             pattern: 'water_standing'
-           }, {
-             pattern: 'waves'
-           }],
-           wetland: [{
-             wetland: 'marsh',
-             pattern: 'wetland_marsh'
-           }, {
-             wetland: 'swamp',
-             pattern: 'wetland_swamp'
-           }, {
-             wetland: 'bog',
-             pattern: 'wetland_bog'
-           }, {
-             wetland: 'reedbed',
-             pattern: 'wetland_reedbed'
-           }, {
-             pattern: 'wetland'
-           }],
-           wood: [{
-             leaf_type: 'broadleaved',
-             pattern: 'forest_broadleaved'
-           }, {
-             leaf_type: 'needleleaved',
-             pattern: 'forest_needleleaved'
-           }, {
-             leaf_type: 'leafless',
-             pattern: 'forest_leafless'
-           }, {
-             pattern: 'forest'
-           } // same as 'leaf_type:mixed'
-           ]
-         },
-         traffic_calming: {
-           island: [{
-             surface: 'grass',
-             pattern: 'grass'
-           }],
-           chicane: [{
-             surface: 'grass',
-             pattern: 'grass'
-           }],
-           choker: [{
-             surface: 'grass',
-             pattern: 'grass'
-           }]
-         }
-       };
-       function svgTagPattern(tags) {
-         // Skip pattern filling if this is a building (buildings don't get patterns applied)
-         if (tags.building && tags.building !== 'no') {
-           return null;
-         }
+           if (box && options.padding) {
+             box.top -= options.padding;
+             box.left -= options.padding;
+             box.bottom += options.padding;
+             box.right += options.padding;
+             box.height += options.padding * 2;
+             box.width += options.padding * 2;
+           }
 
-         for (var tag in patterns) {
-           var entityValue = tags[tag];
-           if (!entityValue) continue;
+           var tooltipBox;
 
-           if (typeof patterns[tag] === 'string') {
-             // extra short syntax (just tag) - pattern name
-             return 'pattern-' + patterns[tag];
-           } else {
-             var values = patterns[tag];
+           if (options.tooltipBox) {
+             tooltipBox = options.tooltipBox;
 
-             for (var value in values) {
-               if (entityValue !== value) continue;
-               var rules = values[value];
+             if (typeof tooltipBox === 'string') {
+               tooltipBox = select(tooltipBox).node();
+             }
 
-               if (typeof rules === 'string') {
-                 // short syntax - pattern name
-                 return 'pattern-' + rules;
-               } // long syntax - rule array
+             if (tooltipBox && tooltipBox.getBoundingClientRect) {
+               tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
+             }
+           } else {
+             tooltipBox = box;
+           }
+
+           if (tooltipBox && html) {
+             if (html.indexOf('**') !== -1) {
+               if (html.indexOf('<span') === 0) {
+                 html = html.replace(/^(<span.*?>)(.+?)(\*\*)/, '$1<span>$2</span>$3');
+               } else {
+                 html = html.replace(/^(.+?)(\*\*)/, '<span>$1</span>$2');
+               } // pseudo markdown bold text for the instruction section..
 
 
-               for (var ruleKey in rules) {
-                 var rule = rules[ruleKey];
-                 var pass = true;
+               html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
+             }
 
-                 for (var criterion in rule) {
-                   if (criterion !== 'pattern') {
-                     // reserved for pattern name
-                     // The only rule is a required tag-value pair
-                     var v = tags[criterion];
+             html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
 
-                     if (!v || v !== rule[criterion]) {
-                       pass = false;
-                       break;
-                     }
-                   }
-                 }
+             html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
 
-                 if (pass) {
-                   return 'pattern-' + rule.pattern;
-                 }
-               }
+             if (options.buttonText && options.buttonCallback) {
+               html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
              }
-           }
-         }
 
-         return null;
-       }
+             var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
+             tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
 
-       function svgAreas(projection, context) {
-         function getPatternStyle(tags) {
-           var imageID = svgTagPattern(tags);
+             if (options.buttonText && options.buttonCallback) {
+               var button = tooltip.selectAll('.button-section .button.action');
+               button.on('click', function (d3_event) {
+                 d3_event.preventDefault();
+                 options.buttonCallback();
+               });
+             }
 
-           if (imageID) {
-             return 'url("#ideditor-' + imageID + '")';
-           }
+             var tip = copyBox(tooltip.node().getBoundingClientRect()),
+                 w = containerNode.clientWidth,
+                 h = containerNode.clientHeight,
+                 tooltipWidth = 200,
+                 tooltipArrow = 5,
+                 side,
+                 pos; // hack: this will have bottom placement,
+             // so need to reserve extra space for the tooltip illustration.
 
-           return '';
-         }
+             if (options.tooltipClass === 'intro-mouse') {
+               tip.height += 80;
+             } // trim box dimensions to just the portion that fits in the container..
 
-         function drawTargets(selection, graph, entities, filter) {
-           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-           var getPath = svgPath(projection).geojson;
-           var activeID = context.activeID();
-           var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
 
-           var data = {
-             targets: [],
-             nopes: []
-           };
-           entities.forEach(function (way) {
-             var features = svgSegmentWay(way, graph, activeID);
-             data.targets.push.apply(data.targets, features.passive);
-             data.nopes.push.apply(data.nopes, features.active);
-           }); // Targets allow hover and vertex snapping
+             if (tooltipBox.top + tooltipBox.height > h) {
+               tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
+             }
 
-           var targetData = data.targets.filter(getPath);
-           var targets = selection.selectAll('.area.target-allowed').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(targetData, function key(d) {
-             return d.id;
-           }); // exit
+             if (tooltipBox.left + tooltipBox.width > w) {
+               tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
+             } // determine tooltip placement..
 
-           targets.exit().remove();
 
-           var segmentWasEdited = function segmentWasEdited(d) {
-             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+             if (tooltipBox.top + tooltipBox.height < 100) {
+               // tooltip below box..
+               side = 'bottom';
+               pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top + tooltipBox.height];
+             } else if (tooltipBox.top > h - 140) {
+               // tooltip above box..
+               side = 'top';
+               pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top - tip.height];
+             } else {
+               // tooltip to the side of the tooltipBox..
+               var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;
 
-             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-               return false;
+               if (_mainLocalizer.textDirection() === 'rtl') {
+                 if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
+                   side = 'right';
+                   pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+                 } else {
+                   side = 'left';
+                   pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+                 }
+               } else {
+                 if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
+                   side = 'left';
+                   pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
+                 } else {
+                   side = 'right';
+                   pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
+                 }
+               }
              }
 
-             return d.properties.nodes.some(function (n) {
-               return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-             });
-           }; // enter/update
-
+             if (options.duration !== 0 || !tooltip.classed(side)) {
+               tooltip.call(uiToggle(true));
+             }
 
-           targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
-             return 'way area target target-allowed ' + targetClass + d.id;
-           }).classed('segment-edited', segmentWasEdited); // NOPE
+             tooltip.style('top', pos[1] + 'px').style('left', pos[0] + 'px').attr('class', classes + ' ' + side); // shift popover-inner if it is very close to the top or bottom edge
+             // (doesn't affect the placement of the popover-arrow)
 
-           var nopeData = data.nopes.filter(getPath);
-           var nopes = selection.selectAll('.area.target-nope').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(nopeData, function key(d) {
-             return d.id;
-           }); // exit
+             var shiftY = 0;
 
-           nopes.exit().remove(); // enter/update
+             if (side === 'left' || side === 'right') {
+               if (pos[1] < 60) {
+                 shiftY = 60 - pos[1];
+               } else if (pos[1] + tip.height > h - 100) {
+                 shiftY = h - pos[1] - tip.height - 100;
+               }
+             }
 
-           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
-             return 'way area target target-nope ' + nopeClass + d.id;
-           }).classed('segment-edited', segmentWasEdited);
-         }
+             tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
+           } else {
+             tooltip.classed('in', false).call(uiToggle(false));
+           }
 
-         function drawAreas(selection, graph, entities, filter) {
-           var path = svgPath(projection, graph, true);
-           var areas = {};
-           var multipolygon;
-           var base = context.history().base();
+           curtain.cut(box, options.duration);
+           return tooltip;
+         };
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             if (entity.geometry(graph) !== 'area') continue;
-             multipolygon = osmIsOldMultipolygonOuterMember(entity, graph);
+         curtain.cut = function (datum, duration) {
+           darkness.datum(datum).interrupt();
+           var selection;
 
-             if (multipolygon) {
-               areas[multipolygon.id] = {
-                 entity: multipolygon.mergeTags(entity.tags),
-                 area: Math.abs(entity.area(graph))
-               };
-             } else if (!areas[entity.id]) {
-               areas[entity.id] = {
-                 entity: entity,
-                 area: Math.abs(entity.area(graph))
-               };
-             }
+           if (duration === 0) {
+             selection = darkness;
+           } else {
+             selection = darkness.transition().duration(duration || 600).ease(linear$1);
            }
 
-           var fills = Object.values(areas).filter(function hasPath(a) {
-             return path(a.entity);
-           });
-           fills.sort(function areaSort(a, b) {
-             return b.area - a.area;
+           selection.attr('d', function (d) {
+             var containerWidth = containerNode.clientWidth;
+             var containerHeight = containerNode.clientHeight;
+             var string = 'M 0,0 L 0,' + containerHeight + ' L ' + containerWidth + ',' + containerHeight + 'L' + containerWidth + ',0 Z';
+             if (!d) return string;
+             return string + 'M' + d.left + ',' + d.top + 'L' + d.left + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + d.top + 'Z';
            });
-           fills = fills.map(function (a) {
-             return a.entity;
+         };
+
+         curtain.remove = function () {
+           surface.remove();
+           tooltip.remove();
+           select(window).on('resize.curtain', null);
+         }; // ClientRects are immutable, so copy them to an object,
+         // in case we need to trim the height/width.
+
+
+         function copyBox(src) {
+           return {
+             top: src.top,
+             right: src.right,
+             bottom: src.bottom,
+             left: src.left,
+             width: src.width,
+             height: src.height
+           };
+         }
+
+         return curtain;
+       }
+
+       function uiIntroWelcome(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var chapter = {
+           title: 'intro.welcome.title'
+         };
+
+         function welcome() {
+           context.map().centerZoom([-85.63591, 41.94285], 19);
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.welcome'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: practice
            });
-           var strokes = fills.filter(function (area) {
-             return area.type === 'way';
+         }
+
+         function practice() {
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: words
            });
-           var data = {
-             clip: fills,
-             shadow: strokes,
-             stroke: strokes,
-             fill: fills
-           };
-           var clipPaths = context.surface().selectAll('defs').selectAll('.clipPath-osm').filter(filter).data(data.clip, osmEntity.key);
-           clipPaths.exit().remove();
-           var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-osm').attr('id', function (entity) {
-             return 'ideditor-' + entity.id + '-clippath';
+         }
+
+         function words() {
+           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: chapters
            });
-           clipPathsEnter.append('path');
-           clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', path);
-           var drawLayer = selection.selectAll('.layer-osm.areas');
-           var touchLayer = selection.selectAll('.layer-touch.areas'); // Draw areas..
+         }
 
-           var areagroup = drawLayer.selectAll('g.areagroup').data(['fill', 'shadow', 'stroke']);
-           areagroup = areagroup.enter().append('g').attr('class', function (d) {
-             return 'areagroup area-' + d;
-           }).merge(areagroup);
-           var paths = areagroup.selectAll('path').filter(filter).data(function (layer) {
-             return data[layer];
-           }, osmEntity.key);
-           paths.exit().remove();
-           var fillpaths = selection.selectAll('.area-fill path.area').nodes();
-           var bisect = d3_bisector(function (node) {
-             return -node.__data__.area(graph);
-           }).left;
+         function chapters() {
+           dispatch.call('done');
+           reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
+             next: _t('intro.navigation.title')
+           }));
+         }
 
-           function sortedByArea(entity) {
-             if (this._parent.__data__ === 'fill') {
-               return fillpaths[bisect(fillpaths, -entity.area(graph))];
-             }
-           }
+         chapter.enter = function () {
+           welcome();
+         };
 
-           paths = paths.enter().insert('path', sortedByArea).merge(paths).each(function (entity) {
-             var layer = this.parentNode.__data__;
-             this.setAttribute('class', entity.type + ' area ' + layer + ' ' + entity.id);
+         chapter.exit = function () {
+           context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+         };
 
-             if (layer === 'fill') {
-               this.setAttribute('clip-path', 'url(#ideditor-' + entity.id + '-clippath)');
-               this.style.fill = this.style.stroke = getPatternStyle(entity.tags);
-             }
-           }).classed('added', function (d) {
-             return !base.entities[d.id];
-           }).classed('geometry-edited', function (d) {
-             return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-           }).classed('retagged', function (d) {
-             return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-           }).call(svgTagClasses()).attr('d', path); // Draw touch targets..
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-           touchLayer.call(drawTargets, graph, data.stroke, filter);
+         return utilRebind(chapter, dispatch, 'on');
+       }
+
+       function uiIntroNavigation(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var timeouts = [];
+         var hallId = 'n2061';
+         var townHall = [-85.63591, 41.94285];
+         var springStreetId = 'w397';
+         var springStreetEndId = 'n1834';
+         var springStreet = [-85.63582, 41.94255];
+         var onewayField = _mainPresetIndex.field('oneway');
+         var maxspeedField = _mainPresetIndex.field('maxspeed');
+         var chapter = {
+           title: 'intro.navigation.title'
+         };
+
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
          }
 
-         return drawAreas;
-       }
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
+
+         function isTownHallSelected() {
+           var ids = context.selectedIDs();
+           return ids.length === 1 && ids[0] === hallId;
+         }
+
+         function dragMap() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(townHall, context.map().center());
+
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
+
+           context.map().centerZoomEase(townHall, 19, msec);
+           timeout(function () {
+             var centerStart = context.map().center();
+             var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
+             var dragString = helpHtml('intro.navigation.map_info') + '{br}' + helpHtml('intro.navigation.' + textId);
+             reveal('.surface', dragString);
+             context.map().on('drawn.intro', function () {
+               reveal('.surface', dragString, {
+                 duration: 0
+               });
+             });
+             context.map().on('move.intro', function () {
+               var centerNow = context.map().center();
 
-       //[4]           NameStartChar      ::=          ":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
-       //[4a]          NameChar           ::=          NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
-       //[5]           Name       ::=          NameStartChar (NameChar)*
-       var nameStartChar = /[A-Z_a-z\xC0-\xD6\xD8-\xF6\u00F8-\u02FF\u0370-\u037D\u037F-\u1FFF\u200C-\u200D\u2070-\u218F\u2C00-\u2FEF\u3001-\uD7FF\uF900-\uFDCF\uFDF0-\uFFFD]/; //\u10000-\uEFFFF
+               if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
+                 context.map().on('move.intro', null);
+                 timeout(function () {
+                   continueTo(zoomMap);
+                 }, 3000);
+               }
+             });
+           }, msec + 100);
 
-       var nameChar = new RegExp("[\\-\\.0-9" + nameStartChar.source.slice(1, -1) + "\\u00B7\\u0300-\\u036F\\u203F-\\u2040]");
-       var tagNamePattern = new RegExp('^' + nameStartChar.source + nameChar.source + '*(?:\:' + nameStartChar.source + nameChar.source + '*)?$'); //var tagNamePattern = /^[a-zA-Z_][\w\-\.]*(?:\:[a-zA-Z_][\w\-\.]*)?$/
-       //var handlers = 'resolveEntity,getExternalSubset,characters,endDocument,endElement,endPrefixMapping,ignorableWhitespace,processingInstruction,setDocumentLocator,skippedEntity,startDocument,startElement,startPrefixMapping,notationDecl,unparsedEntityDecl,error,fatalError,warning,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,comment,endCDATA,endDTD,endEntity,startCDATA,startDTD,startEntity'.split(',')
-       //S_TAG,        S_ATTR, S_EQ,   S_ATTR_NOQUOT_VALUE
-       //S_ATTR_SPACE, S_ATTR_END,     S_TAG_SPACE, S_TAG_CLOSE
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }
 
-       var S_TAG = 0; //tag name offerring
+         function zoomMap() {
+           var zoomStart = context.map().zoom();
+           var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
+           var zoomString = helpHtml('intro.navigation.' + textId);
+           reveal('.surface', zoomString);
+           context.map().on('drawn.intro', function () {
+             reveal('.surface', zoomString, {
+               duration: 0
+             });
+           });
+           context.map().on('move.intro', function () {
+             if (context.map().zoom() !== zoomStart) {
+               context.map().on('move.intro', null);
+               timeout(function () {
+                 continueTo(features);
+               }, 3000);
+             }
+           });
 
-       var S_ATTR = 1; //attr name offerring 
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }
 
-       var S_ATTR_SPACE = 2; //attr name end and space offer
+         function features() {
+           var onClick = function onClick() {
+             continueTo(pointsLinesAreas);
+           };
 
-       var S_EQ = 3; //=space?
+           reveal('.surface', helpHtml('intro.navigation.features'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('drawn.intro', function () {
+             reveal('.surface', helpHtml('intro.navigation.features'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });
 
-       var S_ATTR_NOQUOT_VALUE = 4; //attr value(no quot value only)
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
+           }
+         }
 
-       var S_ATTR_END = 5; //attr value end and no space(quot end)
+         function pointsLinesAreas() {
+           var onClick = function onClick() {
+             continueTo(nodesWays);
+           };
 
-       var S_TAG_SPACE = 6; //(attr value end || tag end ) && (space offer)
+           reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('drawn.intro', function () {
+             reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });
 
-       var S_TAG_CLOSE = 7; //closed el<el />
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
+           }
+         }
 
-       function XMLReader() {}
+         function nodesWays() {
+           var onClick = function onClick() {
+             continueTo(clickTownHall);
+           };
 
-       XMLReader.prototype = {
-         parse: function parse(source, defaultNSMap, entityMap) {
-           var domBuilder = this.domBuilder;
-           domBuilder.startDocument();
+           reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('drawn.intro', function () {
+             reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });
 
-           _copy(defaultNSMap, defaultNSMap = {});
+           function continueTo(nextStep) {
+             context.map().on('drawn.intro', null);
+             nextStep();
+           }
+         }
 
-           _parse(source, defaultNSMap, entityMap, domBuilder, this.errorHandler);
+         function clickTownHall() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var entity = context.hasEntity(hallId);
+           if (!entity) return;
+           reveal(null, null, {
+             duration: 0
+           });
+           context.map().centerZoomEase(entity.loc, 19, 500);
+           timeout(function () {
+             var entity = context.hasEntity(hallId);
+             if (!entity) return;
+             var box = pointBox(entity.loc, context);
+             var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
+             reveal(box, helpHtml('intro.navigation.' + textId));
+             context.map().on('move.intro drawn.intro', function () {
+               var entity = context.hasEntity(hallId);
+               if (!entity) return;
+               var box = pointBox(entity.loc, context);
+               reveal(box, helpHtml('intro.navigation.' + textId), {
+                 duration: 0
+               });
+             });
+             context.on('enter.intro', function () {
+               if (isTownHallSelected()) continueTo(selectedTownHall);
+             });
+           }, 550); // after centerZoomEase
 
-           domBuilder.endDocument();
-         }
-       };
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
+             }
+           });
 
-       function _parse(source, defaultNSMapCopy, entityMap, domBuilder, errorHandler) {
-         function fixedFromCharCode(code) {
-           // String.prototype.fromCharCode does not supports
-           // > 2 bytes unicode chars directly
-           if (code > 0xffff) {
-             code -= 0x10000;
-             var surrogate1 = 0xd800 + (code >> 10),
-                 surrogate2 = 0xdc00 + (code & 0x3ff);
-             return String.fromCharCode(surrogate1, surrogate2);
-           } else {
-             return String.fromCharCode(code);
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
 
-         function entityReplacer(a) {
-           var k = a.slice(1, -1);
+         function selectedTownHall() {
+           if (!isTownHallSelected()) return clickTownHall();
+           var entity = context.hasEntity(hallId);
+           if (!entity) return clickTownHall();
+           var box = pointBox(entity.loc, context);
 
-           if (k in entityMap) {
-             return entityMap[k];
-           } else if (k.charAt(0) === '#') {
-             return fixedFromCharCode(parseInt(k.substr(1).replace('x', '0x')));
-           } else {
-             errorHandler.error('entity not found:' + a);
-             return a;
-           }
-         }
+           var onClick = function onClick() {
+             continueTo(editorTownHall);
+           };
 
-         function appendText(end) {
-           //has some bugs
-           if (end > start) {
-             var xt = source.substring(start, end).replace(/&#?\w+;/g, entityReplacer);
-             locator && position(start);
-             domBuilder.characters(xt, 0, end - start);
-             start = end;
-           }
-         }
+           reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             var entity = context.hasEntity(hallId);
+             if (!entity) return;
+             var box = pointBox(entity.loc, context);
+             reveal(box, helpHtml('intro.navigation.selected_townhall'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
+             }
+           });
 
-         function position(p, m) {
-           while (p >= lineEnd && (m = linePattern.exec(source))) {
-             lineStart = m.index;
-             lineEnd = lineStart + m[0].length;
-             locator.lineNumber++; //console.log('line++:',locator,startPos,endPos)
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
-
-           locator.columnNumber = p - lineStart + 1;
          }
 
-         var lineStart = 0;
-         var lineEnd = 0;
-         var linePattern = /.*(?:\r\n?|\n)|.*$/g;
-         var locator = domBuilder.locator;
-         var parseStack = [{
-           currentNSMap: defaultNSMapCopy
-         }];
-         var closeMap = {};
-         var start = 0;
-
-         while (true) {
-           try {
-             var tagStart = source.indexOf('<', start);
+         function editorTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
 
-             if (tagStart < 0) {
-               if (!source.substr(start).match(/^\s*$/)) {
-                 var doc = domBuilder.doc;
-                 var text = doc.createTextNode(source.substr(start));
-                 doc.appendChild(text);
-                 domBuilder.currentElement = text;
-               }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-               return;
-             }
+           var onClick = function onClick() {
+             continueTo(presetTownHall);
+           };
 
-             if (tagStart > start) {
-               appendText(tagStart);
+           reveal('.entity-editor-pane', helpHtml('intro.navigation.editor_townhall'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.on('exit.intro', function () {
+             continueTo(clickTownHall);
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
              }
+           });
 
-             switch (source.charAt(tagStart + 1)) {
-               case '/':
-                 var end = source.indexOf('>', tagStart + 3);
-                 var tagName = source.substring(tagStart + 2, end);
-                 var config = parseStack.pop();
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             nextStep();
+           }
+         }
 
-                 if (end < 0) {
-                   tagName = source.substring(tagStart + 2).replace(/[\s<].*/, ''); //console.error('#@@@@@@'+tagName)
+         function presetTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-                   errorHandler.error("end tag name: " + tagName + ' is not complete:' + config.tagName);
-                   end = tagStart + 1 + tagName.length;
-                 } else if (tagName.match(/\s</)) {
-                   tagName = tagName.replace(/[\s<].*/, '');
-                   errorHandler.error("end tag name: " + tagName + ' maybe not complete');
-                   end = tagStart + 1 + tagName.length;
-                 } //console.error(parseStack.length,parseStack)
-                 //console.error(config);
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
 
-                 var localNSMap = config.localNSMap;
-                 var endMatch = config.tagName == tagName;
-                 var endIgnoreCaseMach = endMatch || config.tagName && config.tagName.toLowerCase() == tagName.toLowerCase();
+           var entity = context.entity(context.selectedIDs()[0]);
+           var preset = _mainPresetIndex.match(entity, context.graph());
 
-                 if (endIgnoreCaseMach) {
-                   domBuilder.endElement(config.uri, config.localName, tagName);
+           var onClick = function onClick() {
+             continueTo(fieldsTownHall);
+           };
 
-                   if (localNSMap) {
-                     for (var prefix in localNSMap) {
-                       domBuilder.endPrefixMapping(prefix);
-                     }
-                   }
+           reveal('.entity-editor-pane .section-feature-type', helpHtml('intro.navigation.preset_townhall', {
+             preset: preset.name()
+           }), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.on('exit.intro', function () {
+             continueTo(clickTownHall);
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
+             }
+           });
 
-                   if (!endMatch) {
-                     errorHandler.fatalError("end tag name: " + tagName + ' is not match the current start tagName:' + config.tagName);
-                   }
-                 } else {
-                   parseStack.push(config);
-                 }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             nextStep();
+           }
+         }
 
-                 end++;
-                 break;
-               // end elment
+         function fieldsTownHall() {
+           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
 
-               case '?':
-                 // <?...?>
-                 locator && position(tagStart);
-                 end = parseInstruction(source, tagStart, domBuilder);
-                 break;
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
 
-               case '!':
-                 // <!doctype,<![CDATA,<!--
-                 locator && position(tagStart);
-                 end = parseDCC(source, tagStart, domBuilder, errorHandler);
-                 break;
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
 
-               default:
-                 locator && position(tagStart);
-                 var el = new ElementAttributes();
-                 var currentNSMap = parseStack[parseStack.length - 1].currentNSMap; //elStartEnd
+           var onClick = function onClick() {
+             continueTo(closeTownHall);
+           };
 
-                 var end = parseElementStartPart(source, tagStart, el, currentNSMap, entityReplacer, errorHandler);
-                 var len = el.length;
+           reveal('.entity-editor-pane .section-preset-fields', helpHtml('intro.navigation.fields_townhall'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.on('exit.intro', function () {
+             continueTo(clickTownHall);
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(hallId)) {
+               continueTo(clickTownHall);
+             }
+           });
 
-                 if (!el.closed && fixSelfClosed(source, end, el.tagName, closeMap)) {
-                   el.closed = true;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             nextStep();
+           }
+         }
 
-                   if (!entityMap.nbsp) {
-                     errorHandler.warning('unclosed xml attribute');
-                   }
-                 }
+         function closeTownHall() {
+           if (!isTownHallSelected()) return clickTownHall();
+           var selector = '.entity-editor-pane button.close svg use';
+           var href = select(selector).attr('href') || '#iD-icon-close';
+           reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+             button: {
+               html: icon(href, 'inline')
+             }
+           }));
+           context.on('exit.intro', function () {
+             continueTo(searchStreet);
+           });
+           context.history().on('change.intro', function () {
+             // update the close icon in the tooltip if the user edits something.
+             var selector = '.entity-editor-pane button.close svg use';
+             var href = select(selector).attr('href') || '#iD-icon-close';
+             reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
+               button: {
+                 html: icon(href, 'inline')
+               }
+             }), {
+               duration: 0
+             });
+           });
 
-                 if (locator && len) {
-                   var locator2 = copyLocator(locator, {}); //try{//attribute position fixed
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-                   for (var i = 0; i < len; i++) {
-                     var a = el[i];
-                     position(a.offset);
-                     a.locator = copyLocator(locator, {});
-                   } //}catch(e){console.error('@@@@@'+e)}
+         function searchStreet() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial'); // ensure spring street exists
 
+           var msec = transitionTime(springStreet, context.map().center());
 
-                   domBuilder.locator = locator2;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-                   if (appendElement(el, domBuilder, currentNSMap)) {
-                     parseStack.push(el);
-                   }
+           context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
 
-                   domBuilder.locator = locator;
-                 } else {
-                   if (appendElement(el, domBuilder, currentNSMap)) {
-                     parseStack.push(el);
-                   }
-                 }
+           timeout(function () {
+             reveal('.search-header input', helpHtml('intro.navigation.search_street', {
+               name: _t('intro.graph.name.spring-street')
+             }));
+             context.container().select('.search-header input').on('keyup.intro', checkSearchResult);
+           }, msec + 100);
+         }
 
-                 if (el.uri === 'http://www.w3.org/1999/xhtml' && !el.closed) {
-                   end = parseHtmlSpecialContent(source, end, el.tagName, entityReplacer, domBuilder);
-                 } else {
-                   end++;
-                 }
+         function checkSearchResult() {
+           var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
 
-             }
-           } catch (e) {
-             errorHandler.error('element parse error: ' + e); //errorHandler.error('element parse error: '+e);
+           var firstName = first.select('.entity-name');
+           var name = _t('intro.graph.name.spring-street');
 
-             end = -1; //throw e;
+           if (!firstName.empty() && firstName.html() === name) {
+             reveal(first.node(), helpHtml('intro.navigation.choose_street', {
+               name: name
+             }), {
+               duration: 300
+             });
+             context.on('exit.intro', function () {
+               continueTo(selectedStreet);
+             });
+             context.container().select('.search-header input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
            }
 
-           if (end > start) {
-             start = end;
-           } else {
-             //TODO: 这里有可能sax回退,有位置错误风险
-             appendText(Math.max(tagStart, start) + 1);
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
+             nextStep();
            }
          }
-       }
-
-       function copyLocator(f, t) {
-         t.lineNumber = f.lineNumber;
-         t.columnNumber = f.columnNumber;
-         return t;
-       }
-       /**
-        * @see #appendElement(source,elStartEnd,el,selfClosed,entityReplacer,domBuilder,parseStack);
-        * @return end of the elementStartPart(end of elementEndPart for selfClosed el)
-        */
-
-
-       function parseElementStartPart(source, start, el, currentNSMap, entityReplacer, errorHandler) {
-         var attrName;
-         var value;
-         var p = ++start;
-         var s = S_TAG; //status
-
-         while (true) {
-           var c = source.charAt(p);
-
-           switch (c) {
-             case '=':
-               if (s === S_ATTR) {
-                 //attrName
-                 attrName = source.slice(start, p);
-                 s = S_EQ;
-               } else if (s === S_ATTR_SPACE) {
-                 s = S_EQ;
-               } else {
-                 //fatalError: equal must after attrName or space after attrName
-                 throw new Error('attribute equal must after attrName');
-               }
-
-               break;
-
-             case '\'':
-             case '"':
-               if (s === S_EQ || s === S_ATTR //|| s == S_ATTR_SPACE
-               ) {
-                   //equal
-                   if (s === S_ATTR) {
-                     errorHandler.warning('attribute value must after "="');
-                     attrName = source.slice(start, p);
-                   }
 
-                   start = p + 1;
-                   p = source.indexOf(c, start);
-
-                   if (p > 0) {
-                     value = source.slice(start, p).replace(/&#?\w+;/g, entityReplacer);
-                     el.add(attrName, value, start - 1);
-                     s = S_ATTR_END;
-                   } else {
-                     //fatalError: no end quot match
-                     throw new Error('attribute value no end \'' + c + '\' match');
-                   }
-                 } else if (s == S_ATTR_NOQUOT_VALUE) {
-                 value = source.slice(start, p).replace(/&#?\w+;/g, entityReplacer); //console.log(attrName,value,start,p)
+         function selectedStreet() {
+           if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+             return searchStreet();
+           }
 
-                 el.add(attrName, value, start); //console.dir(el)
+           var onClick = function onClick() {
+             continueTo(editorStreet);
+           };
 
-                 errorHandler.warning('attribute "' + attrName + '" missed start quot(' + c + ')!!');
-                 start = p + 1;
-                 s = S_ATTR_END;
-               } else {
-                 //fatalError: no equal before
-                 throw new Error('attribute value must after "="');
-               }
+           var entity = context.entity(springStreetEndId);
+           var box = pointBox(entity.loc, context);
+           box.height = 500;
+           reveal(box, helpHtml('intro.navigation.selected_street', {
+             name: _t('intro.graph.name.spring-street')
+           }), {
+             duration: 600,
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           timeout(function () {
+             context.map().on('move.intro drawn.intro', function () {
+               var entity = context.hasEntity(springStreetEndId);
+               if (!entity) return;
+               var box = pointBox(entity.loc, context);
+               box.height = 500;
+               reveal(box, helpHtml('intro.navigation.selected_street', {
+                 name: _t('intro.graph.name.spring-street')
+               }), {
+                 duration: 0,
+                 buttonText: _t.html('intro.ok'),
+                 buttonCallback: onClick
+               });
+             });
+           }, 600); // after reveal.
 
-               break;
+           context.on('enter.intro', function (mode) {
+             if (!context.hasEntity(springStreetId)) {
+               return continueTo(searchStreet);
+             }
 
-             case '/':
-               switch (s) {
-                 case S_TAG:
-                   el.setTagName(source.slice(start, p));
+             var ids = context.selectedIDs();
 
-                 case S_ATTR_END:
-                 case S_TAG_SPACE:
-                 case S_TAG_CLOSE:
-                   s = S_TAG_CLOSE;
-                   el.closed = true;
+             if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
+               // keep Spring Street selected..
+               context.enter(modeSelect(context, [springStreetId]));
+             }
+           });
+           context.history().on('change.intro', function () {
+             if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
+               timeout(function () {
+                 continueTo(searchStreet);
+               }, 300); // after any transition (e.g. if user deleted intersection)
+             }
+           });
 
-                 case S_ATTR_NOQUOT_VALUE:
-                 case S_ATTR:
-                 case S_ATTR_SPACE:
-                   break;
-                 //case S_EQ:
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-                 default:
-                   throw new Error("attribute invalid close char('/')");
+         function editorStreet() {
+           var selector = '.entity-editor-pane button.close svg use';
+           var href = select(selector).attr('href') || '#iD-icon-close';
+           reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+             button: {
+               html: icon(href, 'inline')
+             },
+             field1: {
+               html: onewayField.label()
+             },
+             field2: {
+               html: maxspeedField.label()
+             }
+           }));
+           context.on('exit.intro', function () {
+             continueTo(play);
+           });
+           context.history().on('change.intro', function () {
+             // update the close icon in the tooltip if the user edits something.
+             var selector = '.entity-editor-pane button.close svg use';
+             var href = select(selector).attr('href') || '#iD-icon-close';
+             reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
+               button: {
+                 html: icon(href, 'inline')
+               },
+               field1: {
+                 html: onewayField.label()
+               },
+               field2: {
+                 html: maxspeedField.label()
                }
+             }), {
+               duration: 0
+             });
+           });
 
-               break;
-
-             case '':
-               //end document
-               //throw new Error('unexpected end of input')
-               errorHandler.error('unexpected end of input');
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-               if (s == S_TAG) {
-                 el.setTagName(source.slice(start, p));
-               }
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.navigation.play', {
+             next: _t('intro.points.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-point',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }
 
-               return p;
+         chapter.enter = function () {
+           dragMap();
+         };
 
-             case '>':
-               switch (s) {
-                 case S_TAG:
-                   el.setTagName(source.slice(start, p));
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', null);
+           context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
+         };
 
-                 case S_ATTR_END:
-                 case S_TAG_SPACE:
-                 case S_TAG_CLOSE:
-                   break;
-                 //normal
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-                 case S_ATTR_NOQUOT_VALUE: //Compatible state
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-                 case S_ATTR:
-                   value = source.slice(start, p);
+       function uiIntroPoint(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var timeouts = [];
+         var intersection = [-85.63279, 41.94394];
+         var building = [-85.632422, 41.944045];
+         var cafePreset = _mainPresetIndex.item('amenity/cafe');
+         var _pointID = null;
+         var chapter = {
+           title: 'intro.points.title'
+         };
 
-                   if (value.slice(-1) === '/') {
-                     el.closed = true;
-                     value = value.slice(0, -1);
-                   }
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
 
-                 case S_ATTR_SPACE:
-                   if (s === S_ATTR_SPACE) {
-                     value = attrName;
-                   }
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
 
-                   if (s == S_ATTR_NOQUOT_VALUE) {
-                     errorHandler.warning('attribute "' + value + '" missed quot(")!!');
-                     el.add(attrName, value.replace(/&#?\w+;/g, entityReplacer), start);
-                   } else {
-                     if (currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !value.match(/^(?:disabled|checked|selected)$/i)) {
-                       errorHandler.warning('attribute "' + value + '" missed value!! "' + value + '" instead!!');
-                     }
+         function addPoint() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(intersection, context.map().center());
 
-                     el.add(value, value, start);
-                   }
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-                   break;
+           context.map().centerZoomEase(intersection, 19, msec);
+           timeout(function () {
+             var tooltip = reveal('button.add-point', helpHtml('intro.points.points_info') + '{br}' + helpHtml('intro.points.add_point'));
+             _pointID = null;
+             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-points');
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-point') return;
+               continueTo(placePoint);
+             });
+           }, msec + 100);
 
-                 case S_EQ:
-                   throw new Error('attribute value missed!!');
-               } //                    console.log(tagName,tagNamePattern,tagNamePattern.test(tagName))
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
+         function placePoint() {
+           if (context.mode().id !== 'add-point') {
+             return chapter.restart();
+           }
 
-               return p;
+           var pointBox = pad(building, 150, context);
+           var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
+           reveal(pointBox, helpHtml('intro.points.' + textId));
+           context.map().on('move.intro drawn.intro', function () {
+             pointBox = pad(building, 150, context);
+             reveal(pointBox, helpHtml('intro.points.' + textId), {
+               duration: 0
+             });
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') return chapter.restart();
+             _pointID = context.mode().selectedIDs()[0];
+             continueTo(searchPreset);
+           });
 
-             /*xml space '\x20' | #x9 | #xD | #xA; */
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-             case "\x80":
-               c = ' ';
+         function searchPreset() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           } // disallow scrolling
 
-             default:
-               if (c <= ' ') {
-                 //space
-                 switch (s) {
-                   case S_TAG:
-                     el.setTagName(source.slice(start, p)); //tagName
 
-                     s = S_TAG_SPACE;
-                     break;
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+           reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+             preset: cafePreset.name()
+           }));
+           context.on('enter.intro', function (mode) {
+             if (!_pointID || !context.hasEntity(_pointID)) {
+               return continueTo(addPoint);
+             }
 
-                   case S_ATTR:
-                     attrName = source.slice(start, p);
-                     s = S_ATTR_SPACE;
-                     break;
+             var ids = context.selectedIDs();
 
-                   case S_ATTR_NOQUOT_VALUE:
-                     var value = source.slice(start, p).replace(/&#?\w+;/g, entityReplacer);
-                     errorHandler.warning('attribute "' + value + '" missed quot(")!!');
-                     el.add(attrName, value, start);
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
+               // keep the user's point selected..
+               context.enter(modeSelect(context, [_pointID])); // disallow scrolling
 
-                   case S_ATTR_END:
-                     s = S_TAG_SPACE;
-                     break;
-                   //case S_TAG_SPACE:
-                   //case S_EQ:
-                   //case S_ATTR_SPACE:
-                   //  void();break;
-                   //case S_TAG_CLOSE:
-                   //ignore warning
-                 }
-               } else {
-                 //not space
-                 //S_TAG,      S_ATTR, S_EQ,   S_ATTR_NOQUOT_VALUE
-                 //S_ATTR_SPACE,       S_ATTR_END,     S_TAG_SPACE, S_TAG_CLOSE
-                 switch (s) {
-                   //case S_TAG:void();break;
-                   //case S_ATTR:void();break;
-                   //case S_ATTR_NOQUOT_VALUE:void();break;
-                   case S_ATTR_SPACE:
-                     var tagName = el.tagName;
-
-                     if (currentNSMap[''] !== 'http://www.w3.org/1999/xhtml' || !attrName.match(/^(?:disabled|checked|selected)$/i)) {
-                       errorHandler.warning('attribute "' + attrName + '" missed value!! "' + attrName + '" instead2!!');
-                     }
+               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+               reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
+                 preset: cafePreset.name()
+               }));
+               context.history().on('change.intro', null);
+             }
+           });
 
-                     el.add(attrName, attrName, start);
-                     start = p;
-                     s = S_ATTR;
-                     break;
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');
 
-                   case S_ATTR_END:
-                     errorHandler.warning('attribute space is required"' + attrName + '"!!');
+             if (first.classed('preset-amenity-cafe')) {
+               context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+               reveal(first.select('.preset-list-button').node(), helpHtml('intro.points.choose_cafe', {
+                 preset: cafePreset.name()
+               }), {
+                 duration: 300
+               });
+               context.history().on('change.intro', function () {
+                 continueTo(aboutFeatureEditor);
+               });
+             }
+           }
 
-                   case S_TAG_SPACE:
-                     s = S_ATTR;
-                     start = p;
-                     break;
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+             nextStep();
+           }
+         }
 
-                   case S_EQ:
-                     s = S_ATTR_NOQUOT_VALUE;
-                     start = p;
-                     break;
+         function aboutFeatureEditor() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           }
 
-                   case S_TAG_CLOSE:
-                     throw new Error("elements closed character '/' and '>' must be connected to");
-                 }
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.points.feature_editor'), {
+               tooltipClass: 'intro-points-describe',
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: function buttonCallback() {
+                 continueTo(addName);
                }
+             });
+           }, 400);
+           context.on('exit.intro', function () {
+             // if user leaves select mode here, just continue with the tutorial.
+             continueTo(reselectPoint);
+           });
 
-           } //end outer switch
-           //console.log('p++',p)
-
-
-           p++;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
          }
-       }
-       /**
-        * @return true if has new namespace define
-        */
-
-
-       function appendElement(el, domBuilder, currentNSMap) {
-         var tagName = el.tagName;
-         var localNSMap = null; //var currentNSMap = parseStack[parseStack.length-1].currentNSMap;
-
-         var i = el.length;
-
-         while (i--) {
-           var a = el[i];
-           var qName = a.qName;
-           var value = a.value;
-           var nsp = qName.indexOf(':');
-
-           if (nsp > 0) {
-             var prefix = a.prefix = qName.slice(0, nsp);
-             var localName = qName.slice(nsp + 1);
-             var nsPrefix = prefix === 'xmlns' && localName;
-           } else {
-             localName = qName;
-             prefix = null;
-             nsPrefix = qName === 'xmlns' && '';
-           } //can not set prefix,because prefix !== ''
 
+         function addName() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return addPoint();
+           } // reset pane, in case user happened to change it..
 
-           a.localName = localName; //prefix == null for no ns prefix attribute 
-
-           if (nsPrefix !== false) {
-             //hack!!
-             if (localNSMap == null) {
-               localNSMap = {}; //console.log(currentNSMap,0)
 
-               _copy(currentNSMap, currentNSMap = {}); //console.log(currentNSMap,1)
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           var addNameString = helpHtml('intro.points.fields_info') + '{br}' + helpHtml('intro.points.add_name');
+           timeout(function () {
+             // It's possible for the user to add a name in a previous step..
+             // If so, don't tell them to add the name in this step.
+             // Give them an OK button instead.
+             var entity = context.entity(_pointID);
 
+             if (entity.tags.name) {
+               var tooltip = reveal('.entity-editor-pane', addNameString, {
+                 tooltipClass: 'intro-points-describe',
+                 buttonText: _t.html('intro.ok'),
+                 buttonCallback: function buttonCallback() {
+                   continueTo(addCloseEditor);
+                 }
+               });
+               tooltip.select('.instruction').style('display', 'none');
+             } else {
+               reveal('.entity-editor-pane', addNameString, {
+                 tooltipClass: 'intro-points-describe'
+               });
              }
+           }, 400);
+           context.history().on('change.intro', function () {
+             continueTo(addCloseEditor);
+           });
+           context.on('exit.intro', function () {
+             // if user leaves select mode here, just continue with the tutorial.
+             continueTo(reselectPoint);
+           });
 
-             currentNSMap[nsPrefix] = localNSMap[nsPrefix] = value;
-             a.uri = 'http://www.w3.org/2000/xmlns/';
-             domBuilder.startPrefixMapping(nsPrefix, value);
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
 
-         var i = el.length;
-
-         while (i--) {
-           a = el[i];
-           var prefix = a.prefix;
-
-           if (prefix) {
-             //no prefix attribute has no namespace
-             if (prefix === 'xml') {
-               a.uri = 'http://www.w3.org/XML/1998/namespace';
+         function addCloseEditor() {
+           // reset pane, in case user happened to change it..
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           var selector = '.entity-editor-pane button.close svg use';
+           var href = select(selector).attr('href') || '#iD-icon-close';
+           context.on('exit.intro', function () {
+             continueTo(reselectPoint);
+           });
+           reveal('.entity-editor-pane', helpHtml('intro.points.add_close', {
+             button: {
+               html: icon(href, 'inline')
              }
+           }));
 
-             if (prefix !== 'xmlns') {
-               a.uri = currentNSMap[prefix || '']; //{console.log('###'+a.qName,domBuilder.locator.systemId+'',currentNSMap,a.uri)}
-             }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
          }
 
-         var nsp = tagName.indexOf(':');
-
-         if (nsp > 0) {
-           prefix = el.prefix = tagName.slice(0, nsp);
-           localName = el.localName = tagName.slice(nsp + 1);
-         } else {
-           prefix = null; //important!!
+         function reselectPoint() {
+           if (!_pointID) return chapter.restart();
+           var entity = context.hasEntity(_pointID);
+           if (!entity) return chapter.restart(); // make sure it's still a cafe, in case user somehow changed it..
 
-           localName = el.localName = tagName;
-         } //no prefix element has default namespace
+           var oldPreset = _mainPresetIndex.match(entity, context.graph());
+           context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
+           context.enter(modeBrowse(context));
+           var msec = transitionTime(entity.loc, context.map().center());
 
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-         var ns = el.uri = currentNSMap[prefix || ''];
-         domBuilder.startElement(ns, localName, tagName, el); //endPrefixMapping and startPrefixMapping have not any help for dom builder
-         //localNSMap = null
+           context.map().centerEase(entity.loc, msec);
+           timeout(function () {
+             var box = pointBox(entity.loc, context);
+             reveal(box, helpHtml('intro.points.reselect'), {
+               duration: 600
+             });
+             timeout(function () {
+               context.map().on('move.intro drawn.intro', function () {
+                 var entity = context.hasEntity(_pointID);
+                 if (!entity) return chapter.restart();
+                 var box = pointBox(entity.loc, context);
+                 reveal(box, helpHtml('intro.points.reselect'), {
+                   duration: 0
+                 });
+               });
+             }, 600); // after reveal..
 
-         if (el.closed) {
-           domBuilder.endElement(ns, localName, tagName);
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'select') return;
+               continueTo(updatePoint);
+             });
+           }, msec + 100);
 
-           if (localNSMap) {
-             for (prefix in localNSMap) {
-               domBuilder.endPrefixMapping(prefix);
-             }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
-         } else {
-           el.currentNSMap = currentNSMap;
-           el.localNSMap = localNSMap; //parseStack.push(el);
-
-           return true;
          }
-       }
-
-       function parseHtmlSpecialContent(source, elStartEnd, tagName, entityReplacer, domBuilder) {
-         if (/^(?:script|textarea)$/i.test(tagName)) {
-           var elEndStart = source.indexOf('</' + tagName + '>', elStartEnd);
-           var text = source.substring(elStartEnd + 1, elEndStart);
 
-           if (/[&<]/.test(text)) {
-             if (/^script$/i.test(tagName)) {
-               //if(!/\]\]>/.test(text)){
-               //lexHandler.startCDATA();
-               domBuilder.characters(text, 0, text.length); //lexHandler.endCDATA();
+         function updatePoint() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return continueTo(reselectPoint);
+           } // reset pane, in case user happened to untag the point..
 
-               return elEndStart; //}
-             } //}else{//text area
 
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           context.on('exit.intro', function () {
+             continueTo(reselectPoint);
+           });
+           context.history().on('change.intro', function () {
+             continueTo(updateCloseEditor);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
+               tooltipClass: 'intro-points-describe'
+             });
+           }, 400);
 
-             text = text.replace(/&#?\w+;/g, entityReplacer);
-             domBuilder.characters(text, 0, text.length);
-             return elEndStart; //}
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
 
-         return elStartEnd + 1;
-       }
+         function updateCloseEditor() {
+           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
+             return continueTo(reselectPoint);
+           } // reset pane, in case user happened to change it..
 
-       function fixSelfClosed(source, elStartEnd, tagName, closeMap) {
-         //if(tagName in closeMap){
-         var pos = closeMap[tagName];
 
-         if (pos == null) {
-           //console.log(tagName)
-           pos = source.lastIndexOf('</' + tagName + '>');
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           context.on('exit.intro', function () {
+             continueTo(rightClickPoint);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
+               button: {
+                 html: icon('#iD-icon-close', 'inline')
+               }
+             }));
+           }, 500);
 
-           if (pos < elStartEnd) {
-             //忘记闭合
-             pos = source.lastIndexOf('</' + tagName);
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
-
-           closeMap[tagName] = pos;
-         }
-
-         return pos < elStartEnd; //} 
-       }
-
-       function _copy(source, target) {
-         for (var n in source) {
-           target[n] = source[n];
          }
-       }
 
-       function parseDCC(source, start, domBuilder, errorHandler) {
-         //sure start with '<!'
-         var next = source.charAt(start + 2);
+         function rightClickPoint() {
+           if (!_pointID) return chapter.restart();
+           var entity = context.hasEntity(_pointID);
+           if (!entity) return chapter.restart();
+           context.enter(modeBrowse(context));
+           var box = pointBox(entity.loc, context);
+           var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
+           reveal(box, helpHtml('intro.points.' + textId), {
+             duration: 600
+           });
+           timeout(function () {
+             context.map().on('move.intro', function () {
+               var entity = context.hasEntity(_pointID);
+               if (!entity) return chapter.restart();
+               var box = pointBox(entity.loc, context);
+               reveal(box, helpHtml('intro.points.' + textId), {
+                 duration: 0
+               });
+             });
+           }, 600); // after reveal
 
-         switch (next) {
-           case '-':
-             if (source.charAt(start + 3) === '-') {
-               var end = source.indexOf('-->', start + 4); //append comment source.substring(4,end)//<!--
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') return;
+             var ids = context.selectedIDs();
+             if (ids.length !== 1 || ids[0] !== _pointID) return;
+             timeout(function () {
+               var node = selectMenuItem(context, 'delete').node();
+               if (!node) return;
+               continueTo(enterDelete);
+             }, 50); // after menu visible
+           });
 
-               if (end > start) {
-                 domBuilder.comment(source, start + 4, end - start - 4);
-                 return end + 3;
-               } else {
-                 errorHandler.error("Unclosed comment");
-                 return -1;
-               }
-             } else {
-               //error
-               return -1;
-             }
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             nextStep();
+           }
+         }
 
-           default:
-             if (source.substr(start + 3, 6) == 'CDATA[') {
-               var end = source.indexOf(']]>', start + 9);
-               domBuilder.startCDATA();
-               domBuilder.characters(source, start + 9, end - start - 9);
-               domBuilder.endCDATA();
-               return end + 3;
-             } //<!DOCTYPE
-             //startDTD(java.lang.String name, java.lang.String publicId, java.lang.String systemId) 
+         function enterDelete() {
+           if (!_pointID) return chapter.restart();
+           var entity = context.hasEntity(_pointID);
+           if (!entity) return chapter.restart();
+           var node = selectMenuItem(context, 'delete').node();
 
+           if (!node) {
+             return continueTo(rightClickPoint);
+           }
 
-             var matchs = split$1(source, start);
-             var len = matchs.length;
+           reveal('.edit-menu', helpHtml('intro.points.delete'), {
+             padding: 50
+           });
+           timeout(function () {
+             context.map().on('move.intro', function () {
+               reveal('.edit-menu', helpHtml('intro.points.delete'), {
+                 duration: 0,
+                 padding: 50
+               });
+             });
+           }, 300); // after menu visible
 
-             if (len > 1 && /!doctype/i.test(matchs[0][0])) {
-               var name = matchs[1][0];
-               var pubid = len > 3 && /^public$/i.test(matchs[2][0]) && matchs[3][0];
-               var sysid = len > 4 && matchs[4][0];
-               var lastMatch = matchs[len - 1];
-               domBuilder.startDTD(name, pubid && pubid.replace(/^(['"])(.*?)\1$/, '$2'), sysid && sysid.replace(/^(['"])(.*?)\1$/, '$2'));
-               domBuilder.endDTD();
-               return lastMatch.index + lastMatch[0].length;
+           context.on('exit.intro', function () {
+             if (!_pointID) return chapter.restart();
+             var entity = context.hasEntity(_pointID);
+             if (entity) return continueTo(rightClickPoint); // point still exists
+           });
+           context.history().on('change.intro', function (changed) {
+             if (changed.deleted().length) {
+               continueTo(undo);
              }
+           });
 
+           function continueTo(nextStep) {
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
+           }
          }
 
-         return -1;
-       }
-
-       function parseInstruction(source, start, domBuilder) {
-         var end = source.indexOf('?>', start);
-
-         if (end) {
-           var match = source.substring(start, end).match(/^<\?(\S*)\s*([\s\S]*?)\s*$/);
+         function undo() {
+           context.history().on('change.intro', function () {
+             continueTo(play);
+           });
+           reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-           if (match) {
-             var len = match[0].length;
-             domBuilder.processingInstruction(match[1], match[2]);
-             return end + 2;
-           } else {
-             //error
-             return -1;
+           function continueTo(nextStep) {
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
 
-         return -1;
-       }
-       /**
-        * @param source
-        */
-
-
-       function ElementAttributes(source) {}
-
-       ElementAttributes.prototype = {
-         setTagName: function setTagName(tagName) {
-           if (!tagNamePattern.test(tagName)) {
-             throw new Error('invalid tagName:' + tagName);
-           }
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.points.play', {
+             next: _t('intro.areas.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-area',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }
 
-           this.tagName = tagName;
-         },
-         add: function add(qName, value, offset) {
-           if (!tagNamePattern.test(qName)) {
-             throw new Error('invalid attribute:' + qName);
-           }
+         chapter.enter = function () {
+           addPoint();
+         };
 
-           this[this.length++] = {
-             qName: qName,
-             value: value,
-             offset: offset
-           };
-         },
-         length: 0,
-         getLocalName: function getLocalName(i) {
-           return this[i].localName;
-         },
-         getLocator: function getLocator(i) {
-           return this[i].locator;
-         },
-         getQName: function getQName(i) {
-           return this[i].qName;
-         },
-         getURI: function getURI(i) {
-           return this[i].uri;
-         },
-         getValue: function getValue(i) {
-           return this[i].value;
-         } //  ,getIndex:function(uri, localName)){
-         //            if(localName){
-         //                    
-         //            }else{
-         //                    var qName = uri
-         //            }
-         //    },
-         //    getValue:function(){return this.getValue(this.getIndex.apply(this,arguments))},
-         //    getType:function(uri,localName){}
-         //    getType:function(i){},
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+         };
 
-       };
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-       function _set_proto_(thiz, parent) {
-         thiz.__proto__ = parent;
-         return thiz;
+         return utilRebind(chapter, dispatch, 'on');
        }
 
-       if (!(_set_proto_({}, _set_proto_.prototype) instanceof _set_proto_)) {
-         _set_proto_ = function _set_proto_(thiz, parent) {
-           function p() {}
-           p.prototype = parent;
-           p = new p();
+       function uiIntroArea(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var playground = [-85.63552, 41.94159];
+         var playgroundPreset = _mainPresetIndex.item('leisure/playground');
+         var nameField = _mainPresetIndex.field('name');
+         var descriptionField = _mainPresetIndex.field('description');
+         var timeouts = [];
 
-           for (parent in thiz) {
-             p[parent] = thiz[parent];
-           }
+         var _areaID;
 
-           return p;
+         var chapter = {
+           title: 'intro.areas.title'
          };
-       }
-
-       function split$1(source, start) {
-         var match;
-         var buf = [];
-         var reg = /'[^']+'|"[^"]+"|[^\s<>\/=]+=?|(\/?\s*>|<)/g;
-         reg.lastIndex = start;
-         reg.exec(source); //skip <
 
-         while (match = reg.exec(source)) {
-           buf.push(match);
-           if (match[1]) return buf;
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
          }
-       }
 
-       var XMLReader_1 = XMLReader;
-       var sax = {
-         XMLReader: XMLReader_1
-       };
-
-       /*
-        * DOM Level 2
-        * Object DOMException
-        * @see http://www.w3.org/TR/REC-DOM-Level-1/ecma-script-language-binding.html
-        * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/ecma-script-binding.html
-        */
-       function copy$1(src, dest) {
-         for (var p in src) {
-           dest[p] = src[p];
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
          }
-       }
-       /**
-       ^\w+\.prototype\.([_\w]+)\s*=\s*((?:.*\{\s*?[\r\n][\s\S]*?^})|\S.*?(?=[;\r\n]));?
-       ^\w+\.prototype\.([_\w]+)\s*=\s*(\S.*?(?=[;\r\n]));?
-        */
-
-
-       function _extends(Class, Super) {
-         var pt = Class.prototype;
 
-         if (Object.create) {
-           var ppt = Object.create(Super.prototype);
-           pt.__proto__ = ppt;
-         }
-
-         if (!(pt instanceof Super)) {
-           var t = function t() {};
-           t.prototype = Super.prototype;
-           t = new t();
-           copy$1(pt, t);
-           Class.prototype = pt = t;
-         }
-
-         if (pt.constructor != Class) {
-           if (typeof Class != 'function') {
-             console.error("unknow Class:" + Class);
-           }
-
-           pt.constructor = Class;
-         }
-       }
-
-       var htmlns = 'http://www.w3.org/1999/xhtml'; // Node Types
-
-       var NodeType = {};
-       var ELEMENT_NODE = NodeType.ELEMENT_NODE = 1;
-       var ATTRIBUTE_NODE = NodeType.ATTRIBUTE_NODE = 2;
-       var TEXT_NODE = NodeType.TEXT_NODE = 3;
-       var CDATA_SECTION_NODE = NodeType.CDATA_SECTION_NODE = 4;
-       var ENTITY_REFERENCE_NODE = NodeType.ENTITY_REFERENCE_NODE = 5;
-       var ENTITY_NODE = NodeType.ENTITY_NODE = 6;
-       var PROCESSING_INSTRUCTION_NODE = NodeType.PROCESSING_INSTRUCTION_NODE = 7;
-       var COMMENT_NODE = NodeType.COMMENT_NODE = 8;
-       var DOCUMENT_NODE = NodeType.DOCUMENT_NODE = 9;
-       var DOCUMENT_TYPE_NODE = NodeType.DOCUMENT_TYPE_NODE = 10;
-       var DOCUMENT_FRAGMENT_NODE = NodeType.DOCUMENT_FRAGMENT_NODE = 11;
-       var NOTATION_NODE = NodeType.NOTATION_NODE = 12; // ExceptionCode
-
-       var ExceptionCode = {};
-       var ExceptionMessage = {};
-       var INDEX_SIZE_ERR = ExceptionCode.INDEX_SIZE_ERR = (ExceptionMessage[1] = "Index size error", 1);
-       var DOMSTRING_SIZE_ERR = ExceptionCode.DOMSTRING_SIZE_ERR = (ExceptionMessage[2] = "DOMString size error", 2);
-       var HIERARCHY_REQUEST_ERR = ExceptionCode.HIERARCHY_REQUEST_ERR = (ExceptionMessage[3] = "Hierarchy request error", 3);
-       var WRONG_DOCUMENT_ERR = ExceptionCode.WRONG_DOCUMENT_ERR = (ExceptionMessage[4] = "Wrong document", 4);
-       var INVALID_CHARACTER_ERR = ExceptionCode.INVALID_CHARACTER_ERR = (ExceptionMessage[5] = "Invalid character", 5);
-       var NO_DATA_ALLOWED_ERR = ExceptionCode.NO_DATA_ALLOWED_ERR = (ExceptionMessage[6] = "No data allowed", 6);
-       var NO_MODIFICATION_ALLOWED_ERR = ExceptionCode.NO_MODIFICATION_ALLOWED_ERR = (ExceptionMessage[7] = "No modification allowed", 7);
-       var NOT_FOUND_ERR = ExceptionCode.NOT_FOUND_ERR = (ExceptionMessage[8] = "Not found", 8);
-       var NOT_SUPPORTED_ERR = ExceptionCode.NOT_SUPPORTED_ERR = (ExceptionMessage[9] = "Not supported", 9);
-       var INUSE_ATTRIBUTE_ERR = ExceptionCode.INUSE_ATTRIBUTE_ERR = (ExceptionMessage[10] = "Attribute in use", 10); //level2
-
-       var INVALID_STATE_ERR = ExceptionCode.INVALID_STATE_ERR = (ExceptionMessage[11] = "Invalid state", 11);
-       var SYNTAX_ERR = ExceptionCode.SYNTAX_ERR = (ExceptionMessage[12] = "Syntax error", 12);
-       var INVALID_MODIFICATION_ERR = ExceptionCode.INVALID_MODIFICATION_ERR = (ExceptionMessage[13] = "Invalid modification", 13);
-       var NAMESPACE_ERR = ExceptionCode.NAMESPACE_ERR = (ExceptionMessage[14] = "Invalid namespace", 14);
-       var INVALID_ACCESS_ERR = ExceptionCode.INVALID_ACCESS_ERR = (ExceptionMessage[15] = "Invalid access", 15);
-
-       function DOMException$2(code, message) {
-         if (message instanceof Error) {
-           var error = message;
-         } else {
-           error = this;
-           Error.call(this, ExceptionMessage[code]);
-           this.message = ExceptionMessage[code];
-           if (Error.captureStackTrace) Error.captureStackTrace(this, DOMException$2);
+         function revealPlayground(center, text, options) {
+           var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
+           var box = pad(center, padding, context);
+           reveal(box, text, options);
          }
 
-         error.code = code;
-         if (message) this.message = this.message + ": " + message;
-         return error;
-       }
-       DOMException$2.prototype = Error.prototype;
-       copy$1(ExceptionCode, DOMException$2);
-       /**
-        * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-536297177
-        * The NodeList interface provides the abstraction of an ordered collection of nodes, without defining or constraining how this collection is implemented. NodeList objects in the DOM are live.
-        * The items in the NodeList are accessible via an integral index, starting from 0.
-        */
-
-       function NodeList() {}
-       NodeList.prototype = {
-         /**
-          * The number of nodes in the list. The range of valid child node indices is 0 to length-1 inclusive.
-          * @standard level1
-          */
-         length: 0,
+         function addArea() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           _areaID = null;
+           var msec = transitionTime(playground, context.map().center());
 
-         /**
-          * Returns the indexth item in the collection. If index is greater than or equal to the number of nodes in the list, this returns null.
-          * @standard level1
-          * @param index  unsigned long 
-          *   Index into the collection.
-          * @return Node
-          *    The node at the indexth position in the NodeList, or null if that is not a valid index. 
-          */
-         item: function item(index) {
-           return this[index] || null;
-         },
-         toString: function toString(isHTML, nodeFilter) {
-           for (var buf = [], i = 0; i < this.length; i++) {
-             serializeToString(this[i], buf, isHTML, nodeFilter);
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           return buf.join('');
-         }
-       };
-
-       function LiveNodeList(node, refresh) {
-         this._node = node;
-         this._refresh = refresh;
-
-         _updateLiveList(this);
-       }
-
-       function _updateLiveList(list) {
-         var inc = list._node._inc || list._node.ownerDocument._inc;
+           context.map().centerZoomEase(playground, 19, msec);
+           timeout(function () {
+             var tooltip = reveal('button.add-area', helpHtml('intro.areas.add_playground'));
+             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-areas');
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-area') return;
+               continueTo(startPlayground);
+             });
+           }, msec + 100);
 
-         if (list._inc != inc) {
-           var ls = list._refresh(list._node); //console.log(ls.length)
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
+         function startPlayground() {
+           if (context.mode().id !== 'add-area') {
+             return chapter.restart();
+           }
 
-           __set__(list, 'length', ls.length);
+           _areaID = null;
+           context.map().zoomEase(19.5, 500);
+           timeout(function () {
+             var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
+             var startDrawString = helpHtml('intro.areas.start_playground') + helpHtml('intro.areas.' + textId);
+             revealPlayground(playground, startDrawString, {
+               duration: 250
+             });
+             timeout(function () {
+               context.map().on('move.intro drawn.intro', function () {
+                 revealPlayground(playground, startDrawString, {
+                   duration: 0
+                 });
+               });
+               context.on('enter.intro', function (mode) {
+                 if (mode.id !== 'draw-area') return chapter.restart();
+                 continueTo(continuePlayground);
+               });
+             }, 250); // after reveal
+           }, 550); // after easing
 
-           copy$1(ls, list);
-           list._inc = inc;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
          }
-       }
-
-       LiveNodeList.prototype.item = function (i) {
-         _updateLiveList(this);
 
-         return this[i];
-       };
-
-       _extends(LiveNodeList, NodeList);
-       /**
-        * 
-        * Objects implementing the NamedNodeMap interface are used to represent collections of nodes that can be accessed by name. Note that NamedNodeMap does not inherit from NodeList; NamedNodeMaps are not maintained in any particular order. Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index, but this is simply to allow convenient enumeration of the contents of a NamedNodeMap, and does not imply that the DOM specifies an order to these Nodes.
-        * NamedNodeMap objects in the DOM are live.
-        * used for attributes or DocumentType entities 
-        */
+         function continuePlayground() {
+           if (context.mode().id !== 'draw-area') {
+             return chapter.restart();
+           }
 
+           _areaID = null;
+           revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+             duration: 250
+           });
+           timeout(function () {
+             context.map().on('move.intro drawn.intro', function () {
+               revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
+                 duration: 0
+               });
+             });
+           }, 250); // after reveal
 
-       function NamedNodeMap() {}
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               var entity = context.hasEntity(context.selectedIDs()[0]);
 
-       function _findNodeIndex(list, node) {
-         var i = list.length;
+               if (entity && entity.nodes.length >= 6) {
+                 return continueTo(finishPlayground);
+               } else {
+                 return;
+               }
+             } else if (mode.id === 'select') {
+               _areaID = context.selectedIDs()[0];
+               return continueTo(searchPresets);
+             } else {
+               return chapter.restart();
+             }
+           });
 
-         while (i--) {
-           if (list[i] === node) {
-             return i;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
          }
-       }
 
-       function _addNamedNode(el, list, newAttr, oldAttr) {
-         if (oldAttr) {
-           list[_findNodeIndex(list, oldAttr)] = newAttr;
-         } else {
-           list[list.length++] = newAttr;
-         }
+         function finishPlayground() {
+           if (context.mode().id !== 'draw-area') {
+             return chapter.restart();
+           }
 
-         if (el) {
-           newAttr.ownerElement = el;
-           var doc = el.ownerDocument;
+           _areaID = null;
+           var finishString = helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.areas.finish_playground');
+           revealPlayground(playground, finishString, {
+             duration: 250
+           });
+           timeout(function () {
+             context.map().on('move.intro drawn.intro', function () {
+               revealPlayground(playground, finishString, {
+                 duration: 0
+               });
+             });
+           }, 250); // after reveal
 
-           if (doc) {
-             oldAttr && _onRemoveAttribute(doc, el, oldAttr);
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               return;
+             } else if (mode.id === 'select') {
+               _areaID = context.selectedIDs()[0];
+               return continueTo(searchPresets);
+             } else {
+               return chapter.restart();
+             }
+           });
 
-             _onAddAttribute(doc, el, newAttr);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
          }
-       }
-
-       function _removeNamedNode(el, list, attr) {
-         //console.log('remove attr:'+attr)
-         var i = _findNodeIndex(list, attr);
 
-         if (i >= 0) {
-           var lastIndex = list.length - 1;
-
-           while (i < lastIndex) {
-             list[i] = list[++i];
+         function searchPresets() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
            }
 
-           list.length = lastIndex;
+           var ids = context.selectedIDs();
+
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             context.enter(modeSelect(context, [_areaID]));
+           } // disallow scrolling
 
-           if (el) {
-             var doc = el.ownerDocument;
 
-             if (doc) {
-               _onRemoveAttribute(doc, el, attr);
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+             reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+               preset: playgroundPreset.name()
+             }));
+           }, 400); // after preset list pane visible..
 
-               attr.ownerElement = null;
+           context.on('enter.intro', function (mode) {
+             if (!_areaID || !context.hasEntity(_areaID)) {
+               return continueTo(addArea);
              }
-           }
-         } else {
-           throw DOMException$2(NOT_FOUND_ERR, new Error(el.tagName + '@' + attr));
-         }
-       }
 
-       NamedNodeMap.prototype = {
-         length: 0,
-         item: NodeList.prototype.item,
-         getNamedItem: function getNamedItem(key) {
-           //          if(key.indexOf(':')>0 || key == 'xmlns'){
-           //                  return null;
-           //          }
-           //console.log()
-           var i = this.length;
+             var ids = context.selectedIDs();
+
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
+               // keep the user's area selected..
+               context.enter(modeSelect(context, [_areaID])); // reset pane, in case user somehow happened to change it..
+
+               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
+
+               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+               reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
+                 preset: playgroundPreset.name()
+               }));
+               context.history().on('change.intro', null);
+             }
+           });
 
-           while (i--) {
-             var attr = this[i]; //console.log(attr.nodeName,key)
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');
 
-             if (attr.nodeName == key) {
-               return attr;
+             if (first.classed('preset-leisure-playground')) {
+               reveal(first.select('.preset-list-button').node(), helpHtml('intro.areas.choose_playground', {
+                 preset: playgroundPreset.name()
+               }), {
+                 duration: 300
+               });
+               context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+               context.history().on('change.intro', function () {
+                 continueTo(clickAddField);
+               });
              }
            }
-         },
-         setNamedItem: function setNamedItem(attr) {
-           var el = attr.ownerElement;
 
-           if (el && el != this._ownerElement) {
-             throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+             nextStep();
            }
+         }
 
-           var oldAttr = this.getNamedItem(attr.nodeName);
-
-           _addNamedNode(this._ownerElement, this, attr, oldAttr);
-
-           return oldAttr;
-         },
-
-         /* returns Node */
-         setNamedItemNS: function setNamedItemNS(attr) {
-           // raises: WRONG_DOCUMENT_ERR,NO_MODIFICATION_ALLOWED_ERR,INUSE_ATTRIBUTE_ERR
-           var el = attr.ownerElement,
-               oldAttr;
-
-           if (el && el != this._ownerElement) {
-             throw new DOMException$2(INUSE_ATTRIBUTE_ERR);
+         function clickAddField() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
            }
 
-           oldAttr = this.getNamedItemNS(attr.namespaceURI, attr.localName);
+           var ids = context.selectedIDs();
 
-           _addNamedNode(this._ownerElement, this, attr, oldAttr);
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           }
 
-           return oldAttr;
-         },
+           if (!context.container().select('.form-field-description').empty()) {
+             return continueTo(describePlayground);
+           } // disallow scrolling
 
-         /* returns Node */
-         removeNamedItem: function removeNamedItem(key) {
-           var attr = this.getNamedItem(key);
 
-           _removeNamedNode(this._ownerElement, this, attr);
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // It's possible for the user to add a description in a previous step..
+             // If they did this already, just continue to next step.
 
-           return attr;
-         },
-         // raises: NOT_FOUND_ERR,NO_MODIFICATION_ALLOWED_ERR
-         //for level2
-         removeNamedItemNS: function removeNamedItemNS(namespaceURI, localName) {
-           var attr = this.getNamedItemNS(namespaceURI, localName);
+             var entity = context.entity(_areaID);
 
-           _removeNamedNode(this._ownerElement, this, attr);
+             if (entity.tags.description) {
+               return continueTo(play);
+             } // scroll "Add field" into view
 
-           return attr;
-         },
-         getNamedItemNS: function getNamedItemNS(namespaceURI, localName) {
-           var i = this.length;
 
-           while (i--) {
-             var node = this[i];
+             var box = context.container().select('.more-fields').node().getBoundingClientRect();
 
-             if (node.localName == localName && node.namespaceURI == namespaceURI) {
-               return node;
+             if (box.top > 300) {
+               var pane = context.container().select('.entity-editor-pane .inspector-body');
+               var start = pane.node().scrollTop;
+               var end = start + (box.top - 300);
+               pane.transition().duration(250).tween('scroll.inspector', function () {
+                 var node = this;
+                 var i = d3_interpolateNumber(start, end);
+                 return function (t) {
+                   node.scrollTop = i(t);
+                 };
+               });
              }
-           }
 
-           return null;
-         }
-       };
-       /**
-        * @see http://www.w3.org/TR/REC-DOM-Level-1/level-one-core.html#ID-102161490
-        */
+             timeout(function () {
+               reveal('.more-fields .combobox-input', helpHtml('intro.areas.add_field', {
+                 name: {
+                   html: nameField.label()
+                 },
+                 description: {
+                   html: descriptionField.label()
+                 }
+               }), {
+                 duration: 300
+               });
+               context.container().select('.more-fields .combobox-input').on('click.intro', function () {
+                 // Watch for the combobox to appear...
+                 var watcher;
+                 watcher = window.setInterval(function () {
+                   if (!context.container().select('div.combobox').empty()) {
+                     window.clearInterval(watcher);
+                     continueTo(chooseDescriptionField);
+                   }
+                 }, 300);
+               });
+             }, 300); // after "Add Field" visible
+           }, 400); // after editor pane visible
 
-       function DOMImplementation(
-       /* Object */
-       features) {
-         this._features = {};
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });
 
-         if (features) {
-           for (var feature in features) {
-             this._features = features[feature];
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.more-fields .combobox-input').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
            }
          }
-       }
-       DOMImplementation.prototype = {
-         hasFeature: function hasFeature(
-         /* string */
-         feature,
-         /* string */
-         version) {
-           var versions = this._features[feature.toLowerCase()];
 
-           if (versions && (!version || version in versions)) {
-             return true;
-           } else {
-             return false;
+         function chooseDescriptionField() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
            }
-         },
-         // Introduced in DOM Level 2:
-         createDocument: function createDocument(namespaceURI, qualifiedName, doctype) {
-           // raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR,WRONG_DOCUMENT_ERR
-           var doc = new Document();
-           doc.implementation = this;
-           doc.childNodes = new NodeList();
-           doc.doctype = doctype;
 
-           if (doctype) {
-             doc.appendChild(doctype);
-           }
+           var ids = context.selectedIDs();
 
-           if (qualifiedName) {
-             var root = doc.createElementNS(namespaceURI, qualifiedName);
-             doc.appendChild(root);
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
            }
 
-           return doc;
-         },
-         // Introduced in DOM Level 2:
-         createDocumentType: function createDocumentType(qualifiedName, publicId, systemId) {
-           // raises:INVALID_CHARACTER_ERR,NAMESPACE_ERR
-           var node = new DocumentType();
-           node.name = qualifiedName;
-           node.nodeName = qualifiedName;
-           node.publicId = publicId;
-           node.systemId = systemId; // Introduced in DOM Level 2:
-           //readonly attribute DOMString        internalSubset;
-           //TODO:..
-           //  readonly attribute NamedNodeMap     entities;
-           //  readonly attribute NamedNodeMap     notations;
+           if (!context.container().select('.form-field-description').empty()) {
+             return continueTo(describePlayground);
+           } // Make sure combobox is ready..
 
-           return node;
-         }
-       };
-       /**
-        * @see http://www.w3.org/TR/2000/REC-DOM-Level-2-Core-20001113/core.html#ID-1950641247
-        */
 
-       function Node() {}
-       Node.prototype = {
-         firstChild: null,
-         lastChild: null,
-         previousSibling: null,
-         nextSibling: null,
-         attributes: null,
-         parentNode: null,
-         childNodes: null,
-         ownerDocument: null,
-         nodeValue: null,
-         namespaceURI: null,
-         prefix: null,
-         localName: null,
-         // Modified in DOM Level 2:
-         insertBefore: function insertBefore(newChild, refChild) {
-           //raises 
-           return _insertBefore(this, newChild, refChild);
-         },
-         replaceChild: function replaceChild(newChild, oldChild) {
-           //raises 
-           this.insertBefore(newChild, oldChild);
-
-           if (oldChild) {
-             this.removeChild(oldChild);
-           }
-         },
-         removeChild: function removeChild(oldChild) {
-           return _removeChild(this, oldChild);
-         },
-         appendChild: function appendChild(newChild) {
-           return this.insertBefore(newChild, null);
-         },
-         hasChildNodes: function hasChildNodes() {
-           return this.firstChild != null;
-         },
-         cloneNode: function cloneNode(deep) {
-           return _cloneNode(this.ownerDocument || this, this, deep);
-         },
-         // Modified in DOM Level 2:
-         normalize: function normalize() {
-           var child = this.firstChild;
-
-           while (child) {
-             var next = child.nextSibling;
-
-             if (next && next.nodeType == TEXT_NODE && child.nodeType == TEXT_NODE) {
-               this.removeChild(next);
-               child.appendData(next.data);
-             } else {
-               child.normalize();
-               child = next;
-             }
-           }
-         },
-         // Introduced in DOM Level 2:
-         isSupported: function isSupported(feature, version) {
-           return this.ownerDocument.implementation.hasFeature(feature, version);
-         },
-         // Introduced in DOM Level 2:
-         hasAttributes: function hasAttributes() {
-           return this.attributes.length > 0;
-         },
-         lookupPrefix: function lookupPrefix(namespaceURI) {
-           var el = this;
+           if (context.container().select('div.combobox').empty()) {
+             return continueTo(clickAddField);
+           } // Watch for the combobox to go away..
 
-           while (el) {
-             var map = el._nsMap; //console.dir(map)
 
-             if (map) {
-               for (var n in map) {
-                 if (map[n] == namespaceURI) {
-                   return n;
+           var watcher;
+           watcher = window.setInterval(function () {
+             if (context.container().select('div.combobox').empty()) {
+               window.clearInterval(watcher);
+               timeout(function () {
+                 if (context.container().select('.form-field-description').empty()) {
+                   continueTo(retryChooseDescription);
+                 } else {
+                   continueTo(describePlayground);
                  }
-               }
+               }, 300); // after description field added.
              }
-
-             el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
-           }
-
-           return null;
-         },
-         // Introduced in DOM Level 3:
-         lookupNamespaceURI: function lookupNamespaceURI(prefix) {
-           var el = this;
-
-           while (el) {
-             var map = el._nsMap; //console.dir(map)
-
-             if (map) {
-               if (prefix in map) {
-                 return map[prefix];
-               }
+           }, 300);
+           reveal('div.combobox', helpHtml('intro.areas.choose_field', {
+             field: {
+               html: descriptionField.label()
              }
+           }), {
+             duration: 300
+           });
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });
 
-             el = el.nodeType == ATTRIBUTE_NODE ? el.ownerDocument : el.parentNode;
+           function continueTo(nextStep) {
+             if (watcher) window.clearInterval(watcher);
+             context.on('exit.intro', null);
+             nextStep();
            }
-
-           return null;
-         },
-         // Introduced in DOM Level 3:
-         isDefaultNamespace: function isDefaultNamespace(namespaceURI) {
-           var prefix = this.lookupPrefix(namespaceURI);
-           return prefix == null;
          }
-       };
-
-       function _xmlEncoder(c) {
-         return c == '<' && '&lt;' || c == '>' && '&gt;' || c == '&' && '&amp;' || c == '"' && '&quot;' || '&#' + c.charCodeAt() + ';';
-       }
 
-       copy$1(NodeType, Node);
-       copy$1(NodeType, Node.prototype);
-       /**
-        * @param callback return true for continue,false for break
-        * @return boolean true: break visit;
-        */
+         function describePlayground() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }
 
-       function _visitNode(node, callback) {
-         if (callback(node)) {
-           return true;
-         }
+           var ids = context.selectedIDs();
 
-         if (node = node.firstChild) {
-           do {
-             if (_visitNode(node, callback)) {
-               return true;
-             }
-           } while (node = node.nextSibling);
-         }
-       }
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           } // reset pane, in case user happened to change it..
 
-       function Document() {}
 
-       function _onAddAttribute(doc, el, newAttr) {
-         doc && doc._inc++;
-         var ns = newAttr.namespaceURI;
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
 
-         if (ns == 'http://www.w3.org/2000/xmlns/') {
-           //update namespace
-           el._nsMap[newAttr.prefix ? newAttr.localName : ''] = newAttr.value;
-         }
-       }
+           if (context.container().select('.form-field-description').empty()) {
+             return continueTo(retryChooseDescription);
+           }
 
-       function _onRemoveAttribute(doc, el, newAttr, remove) {
-         doc && doc._inc++;
-         var ns = newAttr.namespaceURI;
+           context.on('exit.intro', function () {
+             continueTo(play);
+           });
+           reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
+             button: {
+               html: icon('#iD-icon-close', 'inline')
+             }
+           }), {
+             duration: 300
+           });
 
-         if (ns == 'http://www.w3.org/2000/xmlns/') {
-           //update namespace
-           delete el._nsMap[newAttr.prefix ? newAttr.localName : ''];
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
          }
-       }
 
-       function _onUpdateChild(doc, el, newChild) {
-         if (doc && doc._inc) {
-           doc._inc++; //update childNodes
+         function retryChooseDescription() {
+           if (!_areaID || !context.hasEntity(_areaID)) {
+             return addArea();
+           }
 
-           var cs = el.childNodes;
+           var ids = context.selectedIDs();
+
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
+             return searchPresets();
+           } // reset pane, in case user happened to change it..
 
-           if (newChild) {
-             cs[cs.length++] = newChild;
-           } else {
-             //console.log(1)
-             var child = el.firstChild;
-             var i = 0;
 
-             while (child) {
-               cs[i++] = child;
-               child = child.nextSibling;
+           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+           reveal('.entity-editor-pane', helpHtml('intro.areas.retry_add_field', {
+             field: {
+               html: descriptionField.label()
+             }
+           }), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(clickAddField);
              }
+           });
+           context.on('exit.intro', function () {
+             return continueTo(searchPresets);
+           });
 
-             cs.length = i;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
          }
-       }
-       /**
-        * attributes;
-        * children;
-        * 
-        * writeable properties:
-        * nodeValue,Attr:value,CharacterData:data
-        * prefix
-        */
-
 
-       function _removeChild(parentNode, child) {
-         var previous = child.previousSibling;
-         var next = child.nextSibling;
-
-         if (previous) {
-           previous.nextSibling = next;
-         } else {
-           parentNode.firstChild = next;
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.areas.play', {
+             next: _t('intro.lines.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-line',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
          }
 
-         if (next) {
-           next.previousSibling = previous;
-         } else {
-           parentNode.lastChild = previous;
-         }
+         chapter.enter = function () {
+           addArea();
+         };
+
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', null);
+           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+           context.container().select('.more-fields .combobox-input').on('click.intro', null);
+         };
 
-         _onUpdateChild(parentNode.ownerDocument, parentNode);
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-         return child;
+         return utilRebind(chapter, dispatch, 'on');
        }
-       /**
-        * preformance key(refChild == null)
-        */
 
+       function uiIntroLine(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var timeouts = [];
+         var _tulipRoadID = null;
+         var flowerRoadID = 'w646';
+         var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
+         var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
+         var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
+         var roadCategory = _mainPresetIndex.item('category-road_minor');
+         var residentialPreset = _mainPresetIndex.item('highway/residential');
+         var woodRoadID = 'w525';
+         var woodRoadEndID = 'n2862';
+         var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
+         var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
+         var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
+         var washingtonStreetID = 'w522';
+         var twelfthAvenueID = 'w1';
+         var eleventhAvenueEndID = 'n3550';
+         var twelfthAvenueEndID = 'n5';
+         var _washingtonSegmentID = null;
+         var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
+         var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
+         var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
+         var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
+         var chapter = {
+           title: 'intro.lines.title'
+         };
 
-       function _insertBefore(parentNode, newChild, nextChild) {
-         var cp = newChild.parentNode;
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
 
-         if (cp) {
-           cp.removeChild(newChild); //remove and update
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
          }
 
-         if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
-           var newFirst = newChild.firstChild;
+         function addLine() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           var msec = transitionTime(tulipRoadStart, context.map().center());
 
-           if (newFirst == null) {
-             return newChild;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           var newLast = newChild.lastChild;
-         } else {
-           newFirst = newLast = newChild;
-         }
-
-         var pre = nextChild ? nextChild.previousSibling : parentNode.lastChild;
-         newFirst.previousSibling = pre;
-         newLast.nextSibling = nextChild;
-
-         if (pre) {
-           pre.nextSibling = newFirst;
-         } else {
-           parentNode.firstChild = newFirst;
-         }
+           context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
+           timeout(function () {
+             var tooltip = reveal('button.add-line', helpHtml('intro.lines.add_line'));
+             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-lines');
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-line') return;
+               continueTo(startLine);
+             });
+           }, msec + 100);
 
-         if (nextChild == null) {
-           parentNode.lastChild = newLast;
-         } else {
-           nextChild.previousSibling = newLast;
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
          }
 
-         do {
-           newFirst.parentNode = parentNode;
-         } while (newFirst !== newLast && (newFirst = newFirst.nextSibling));
-
-         _onUpdateChild(parentNode.ownerDocument || parentNode, parentNode); //console.log(parentNode.lastChild.nextSibling == null)
-
+         function startLine() {
+           if (context.mode().id !== 'add-line') return chapter.restart();
+           _tulipRoadID = null;
+           var padding = 70 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(tulipRoadStart, padding, context);
+           box.height = box.height + 100;
+           var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
+           var startLineString = helpHtml('intro.lines.missing_road') + '{br}' + helpHtml('intro.lines.line_draw_info') + helpHtml('intro.lines.' + textId);
+           reveal(box, startLineString);
+           context.map().on('move.intro drawn.intro', function () {
+             padding = 70 * Math.pow(2, context.map().zoom() - 18);
+             box = pad(tulipRoadStart, padding, context);
+             box.height = box.height + 100;
+             reveal(box, startLineString, {
+               duration: 0
+             });
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'draw-line') return chapter.restart();
+             continueTo(drawLine);
+           });
 
-         if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-           newChild.firstChild = newChild.lastChild = null;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
          }
 
-         return newChild;
-       }
-
-       function _appendSingleChild(parentNode, newChild) {
-         var cp = newChild.parentNode;
+         function drawLine() {
+           if (context.mode().id !== 'draw-line') return chapter.restart();
+           _tulipRoadID = context.mode().selectedIDs()[0];
+           context.map().centerEase(tulipRoadMidpoint, 500);
+           timeout(function () {
+             var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+             var box = pad(tulipRoadMidpoint, padding, context);
+             box.height = box.height * 2;
+             reveal(box, helpHtml('intro.lines.intersect', {
+               name: _t('intro.graph.name.flower-street')
+             }));
+             context.map().on('move.intro drawn.intro', function () {
+               padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
+               box = pad(tulipRoadMidpoint, padding, context);
+               box.height = box.height * 2;
+               reveal(box, helpHtml('intro.lines.intersect', {
+                 name: _t('intro.graph.name.flower-street')
+               }), {
+                 duration: 0
+               });
+             });
+           }, 550); // after easing..
 
-         if (cp) {
-           var pre = parentNode.lastChild;
-           cp.removeChild(newChild); //remove and update
+           context.history().on('change.intro', function () {
+             if (isLineConnected()) {
+               continueTo(continueLine);
+             }
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-line') {
+               return;
+             } else if (mode.id === 'select') {
+               continueTo(retryIntersect);
+               return;
+             } else {
+               return chapter.restart();
+             }
+           });
 
-           var pre = parentNode.lastChild;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
          }
 
-         var pre = parentNode.lastChild;
-         newChild.parentNode = parentNode;
-         newChild.previousSibling = pre;
-         newChild.nextSibling = null;
+         function isLineConnected() {
+           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-         if (pre) {
-           pre.nextSibling = newChild;
-         } else {
-           parentNode.firstChild = newChild;
+           if (!entity) return false;
+           var drawNodes = context.graph().childNodes(entity);
+           return drawNodes.some(function (node) {
+             return context.graph().parentWays(node).some(function (parent) {
+               return parent.id === flowerRoadID;
+             });
+           });
          }
 
-         parentNode.lastChild = newChild;
-
-         _onUpdateChild(parentNode.ownerDocument, parentNode, newChild);
+         function retryIntersect() {
+           select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
+           var box = pad(tulipRoadIntersection, 80, context);
+           reveal(box, helpHtml('intro.lines.retry_intersect', {
+             name: _t('intro.graph.name.flower-street')
+           }));
+           timeout(chapter.restart, 3000);
+         }
 
-         return newChild; //console.log("__aa",parentNode.lastChild.nextSibling == null)
-       }
+         function continueLine() {
+           if (context.mode().id !== 'draw-line') return chapter.restart();
 
-       Document.prototype = {
-         //implementation : null,
-         nodeName: '#document',
-         nodeType: DOCUMENT_NODE,
-         doctype: null,
-         documentElement: null,
-         _inc: 1,
-         insertBefore: function insertBefore(newChild, refChild) {
-           //raises 
-           if (newChild.nodeType == DOCUMENT_FRAGMENT_NODE) {
-             var child = newChild.firstChild;
+           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
 
-             while (child) {
-               var next = child.nextSibling;
-               this.insertBefore(child, refChild);
-               child = next;
+           if (!entity) return chapter.restart();
+           context.map().centerEase(tulipRoadIntersection, 500);
+           var continueLineText = helpHtml('intro.lines.continue_line') + '{br}' + helpHtml('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.lines.finish_road');
+           reveal('.surface', continueLineText);
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-line') {
+               return;
+             } else if (mode.id === 'select') {
+               return continueTo(chooseCategoryRoad);
+             } else {
+               return chapter.restart();
              }
+           });
 
-             return newChild;
-           }
-
-           if (this.documentElement == null && newChild.nodeType == ELEMENT_NODE) {
-             this.documentElement = newChild;
-           }
-
-           return _insertBefore(this, newChild, refChild), newChild.ownerDocument = this, newChild;
-         },
-         removeChild: function removeChild(oldChild) {
-           if (this.documentElement == oldChild) {
-             this.documentElement = null;
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           return _removeChild(this, oldChild);
-         },
-         // Introduced in DOM Level 2:
-         importNode: function importNode(importedNode, deep) {
-           return _importNode(this, importedNode, deep);
-         },
-         // Introduced in DOM Level 2:
-         getElementById: function getElementById(id) {
-           var rtv = null;
-
-           _visitNode(this.documentElement, function (node) {
-             if (node.nodeType == ELEMENT_NODE) {
-               if (node.getAttribute('id') == id) {
-                 rtv = node;
-                 return true;
-               }
-             }
+         function chooseCategoryRoad() {
+           if (context.mode().id !== 'select') return chapter.restart();
+           context.on('exit.intro', function () {
+             return chapter.restart();
            });
+           var button = context.container().select('.preset-category-road_minor .preset-list-button');
+           if (button.empty()) return chapter.restart(); // disallow scrolling
 
-           return rtv;
-         },
-         //document factory method:
-         createElement: function createElement(tagName) {
-           var node = new Element();
-           node.ownerDocument = this;
-           node.nodeName = tagName;
-           node.tagName = tagName;
-           node.childNodes = new NodeList();
-           var attrs = node.attributes = new NamedNodeMap();
-           attrs._ownerElement = node;
-           return node;
-         },
-         createDocumentFragment: function createDocumentFragment() {
-           var node = new DocumentFragment();
-           node.ownerDocument = this;
-           node.childNodes = new NodeList();
-           return node;
-         },
-         createTextNode: function createTextNode(data) {
-           var node = new Text();
-           node.ownerDocument = this;
-           node.appendData(data);
-           return node;
-         },
-         createComment: function createComment(data) {
-           var node = new Comment();
-           node.ownerDocument = this;
-           node.appendData(data);
-           return node;
-         },
-         createCDATASection: function createCDATASection(data) {
-           var node = new CDATASection();
-           node.ownerDocument = this;
-           node.appendData(data);
-           return node;
-         },
-         createProcessingInstruction: function createProcessingInstruction(target, data) {
-           var node = new ProcessingInstruction();
-           node.ownerDocument = this;
-           node.tagName = node.target = target;
-           node.nodeValue = node.data = data;
-           return node;
-         },
-         createAttribute: function createAttribute(name) {
-           var node = new Attr();
-           node.ownerDocument = this;
-           node.name = name;
-           node.nodeName = name;
-           node.localName = name;
-           node.specified = true;
-           return node;
-         },
-         createEntityReference: function createEntityReference(name) {
-           var node = new EntityReference();
-           node.ownerDocument = this;
-           node.nodeName = name;
-           return node;
-         },
-         // Introduced in DOM Level 2:
-         createElementNS: function createElementNS(namespaceURI, qualifiedName) {
-           var node = new Element();
-           var pl = qualifiedName.split(':');
-           var attrs = node.attributes = new NamedNodeMap();
-           node.childNodes = new NodeList();
-           node.ownerDocument = this;
-           node.nodeName = qualifiedName;
-           node.tagName = qualifiedName;
-           node.namespaceURI = namespaceURI;
-
-           if (pl.length == 2) {
-             node.prefix = pl[0];
-             node.localName = pl[1];
-           } else {
-             //el.prefix = null;
-             node.localName = qualifiedName;
-           }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             reveal(button.node(), helpHtml('intro.lines.choose_category_road', {
+               category: roadCategory.name()
+             }));
+             button.on('click.intro', function () {
+               continueTo(choosePresetResidential);
+             });
+           }, 400); // after editor pane visible
 
-           attrs._ownerElement = node;
-           return node;
-         },
-         // Introduced in DOM Level 2:
-         createAttributeNS: function createAttributeNS(namespaceURI, qualifiedName) {
-           var node = new Attr();
-           var pl = qualifiedName.split(':');
-           node.ownerDocument = this;
-           node.nodeName = qualifiedName;
-           node.name = qualifiedName;
-           node.namespaceURI = namespaceURI;
-           node.specified = true;
-
-           if (pl.length == 2) {
-             node.prefix = pl[0];
-             node.localName = pl[1];
-           } else {
-             //el.prefix = null;
-             node.localName = qualifiedName;
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
            }
-
-           return node;
          }
-       };
 
-       _extends(Document, Node);
+         function choosePresetResidential() {
+           if (context.mode().id !== 'select') return chapter.restart();
+           context.on('exit.intro', function () {
+             return chapter.restart();
+           });
+           var subgrid = context.container().select('.preset-category-road_minor .subgrid');
+           if (subgrid.empty()) return chapter.restart();
+           subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button').on('click.intro', function () {
+             continueTo(retryPresetResidential);
+           });
+           subgrid.selectAll('.preset-highway-residential .preset-list-button').on('click.intro', function () {
+             continueTo(nameRoad);
+           });
+           timeout(function () {
+             reveal(subgrid.node(), helpHtml('intro.lines.choose_preset_residential', {
+               preset: residentialPreset.name()
+             }), {
+               tooltipBox: '.preset-highway-residential .preset-list-button',
+               duration: 300
+             });
+           }, 300);
 
-       function Element() {
-         this._nsMap = {};
-       }
-       Element.prototype = {
-         nodeType: ELEMENT_NODE,
-         hasAttribute: function hasAttribute(name) {
-           return this.getAttributeNode(name) != null;
-         },
-         getAttribute: function getAttribute(name) {
-           var attr = this.getAttributeNode(name);
-           return attr && attr.value || '';
-         },
-         getAttributeNode: function getAttributeNode(name) {
-           return this.attributes.getNamedItem(name);
-         },
-         setAttribute: function setAttribute(name, value) {
-           var attr = this.ownerDocument.createAttribute(name);
-           attr.value = attr.nodeValue = "" + value;
-           this.setAttributeNode(attr);
-         },
-         removeAttribute: function removeAttribute(name) {
-           var attr = this.getAttributeNode(name);
-           attr && this.removeAttributeNode(attr);
-         },
-         //four real opeartion method
-         appendChild: function appendChild(newChild) {
-           if (newChild.nodeType === DOCUMENT_FRAGMENT_NODE) {
-             return this.insertBefore(newChild, null);
-           } else {
-             return _appendSingleChild(this, newChild);
+           function continueTo(nextStep) {
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
            }
-         },
-         setAttributeNode: function setAttributeNode(newAttr) {
-           return this.attributes.setNamedItem(newAttr);
-         },
-         setAttributeNodeNS: function setAttributeNodeNS(newAttr) {
-           return this.attributes.setNamedItemNS(newAttr);
-         },
-         removeAttributeNode: function removeAttributeNode(oldAttr) {
-           //console.log(this == oldAttr.ownerElement)
-           return this.attributes.removeNamedItem(oldAttr.nodeName);
-         },
-         //get real attribute name,and remove it by removeAttributeNode
-         removeAttributeNS: function removeAttributeNS(namespaceURI, localName) {
-           var old = this.getAttributeNodeNS(namespaceURI, localName);
-           old && this.removeAttributeNode(old);
-         },
-         hasAttributeNS: function hasAttributeNS(namespaceURI, localName) {
-           return this.getAttributeNodeNS(namespaceURI, localName) != null;
-         },
-         getAttributeNS: function getAttributeNS(namespaceURI, localName) {
-           var attr = this.getAttributeNodeNS(namespaceURI, localName);
-           return attr && attr.value || '';
-         },
-         setAttributeNS: function setAttributeNS(namespaceURI, qualifiedName, value) {
-           var attr = this.ownerDocument.createAttributeNS(namespaceURI, qualifiedName);
-           attr.value = attr.nodeValue = "" + value;
-           this.setAttributeNode(attr);
-         },
-         getAttributeNodeNS: function getAttributeNodeNS(namespaceURI, localName) {
-           return this.attributes.getNamedItemNS(namespaceURI, localName);
-         },
-         getElementsByTagName: function getElementsByTagName(tagName) {
-           return new LiveNodeList(this, function (base) {
-             var ls = [];
+         } // selected wrong road type
 
-             _visitNode(base, function (node) {
-               if (node !== base && node.nodeType == ELEMENT_NODE && (tagName === '*' || node.tagName == tagName)) {
-                 ls.push(node);
-               }
-             });
 
-             return ls;
-           });
-         },
-         getElementsByTagNameNS: function getElementsByTagNameNS(namespaceURI, localName) {
-           return new LiveNodeList(this, function (base) {
-             var ls = [];
+         function retryPresetResidential() {
+           if (context.mode().id !== 'select') return chapter.restart();
+           context.on('exit.intro', function () {
+             return chapter.restart();
+           }); // disallow scrolling
 
-             _visitNode(base, function (node) {
-               if (node !== base && node.nodeType === ELEMENT_NODE && (namespaceURI === '*' || node.namespaceURI === namespaceURI) && (localName === '*' || node.localName == localName)) {
-                 ls.push(node);
-               }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             var button = context.container().select('.entity-editor-pane .preset-list-button');
+             reveal(button.node(), helpHtml('intro.lines.retry_preset_residential', {
+               preset: residentialPreset.name()
+             }));
+             button.on('click.intro', function () {
+               continueTo(chooseCategoryRoad);
              });
+           }, 500);
 
-             return ls;
-           });
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('exit.intro', null);
+             nextStep();
+           }
          }
-       };
-       Document.prototype.getElementsByTagName = Element.prototype.getElementsByTagName;
-       Document.prototype.getElementsByTagNameNS = Element.prototype.getElementsByTagNameNS;
 
-       _extends(Element, Node);
-
-       function Attr() {}
-       Attr.prototype.nodeType = ATTRIBUTE_NODE;
-
-       _extends(Attr, Node);
+         function nameRoad() {
+           context.on('exit.intro', function () {
+             continueTo(didNameRoad);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
+               button: {
+                 html: icon('#iD-icon-close', 'inline')
+               }
+             }), {
+               tooltipClass: 'intro-lines-name_road'
+             });
+           }, 500);
 
-       function CharacterData() {}
-       CharacterData.prototype = {
-         data: '',
-         substringData: function substringData(offset, count) {
-           return this.data.substring(offset, offset + count);
-         },
-         appendData: function appendData(text) {
-           text = this.data + text;
-           this.nodeValue = this.data = text;
-           this.length = text.length;
-         },
-         insertData: function insertData(offset, text) {
-           this.replaceData(offset, 0, text);
-         },
-         appendChild: function appendChild(newChild) {
-           throw new Error(ExceptionMessage[HIERARCHY_REQUEST_ERR]);
-         },
-         deleteData: function deleteData(offset, count) {
-           this.replaceData(offset, count, "");
-         },
-         replaceData: function replaceData(offset, count, text) {
-           var start = this.data.substring(0, offset);
-           var end = this.data.substring(offset + count);
-           text = start + text + end;
-           this.nodeValue = this.data = text;
-           this.length = text.length;
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
+           }
          }
-       };
-
-       _extends(CharacterData, Node);
 
-       function Text() {}
-       Text.prototype = {
-         nodeName: "#text",
-         nodeType: TEXT_NODE,
-         splitText: function splitText(offset) {
-           var text = this.data;
-           var newText = text.substring(offset);
-           text = text.substring(0, offset);
-           this.data = this.nodeValue = text;
-           this.length = text.length;
-           var newNode = this.ownerDocument.createTextNode(newText);
+         function didNameRoad() {
+           context.history().checkpoint('doneAddLine');
+           timeout(function () {
+             reveal('.surface', helpHtml('intro.lines.did_name_road'), {
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: function buttonCallback() {
+                 continueTo(updateLine);
+               }
+             });
+           }, 500);
 
-           if (this.parentNode) {
-             this.parentNode.insertBefore(newNode, this.nextSibling);
+           function continueTo(nextStep) {
+             nextStep();
            }
-
-           return newNode;
          }
-       };
-
-       _extends(Text, CharacterData);
-
-       function Comment() {}
-       Comment.prototype = {
-         nodeName: "#comment",
-         nodeType: COMMENT_NODE
-       };
-
-       _extends(Comment, CharacterData);
-
-       function CDATASection() {}
-       CDATASection.prototype = {
-         nodeName: "#cdata-section",
-         nodeType: CDATA_SECTION_NODE
-       };
-
-       _extends(CDATASection, CharacterData);
-
-       function DocumentType() {}
-       DocumentType.prototype.nodeType = DOCUMENT_TYPE_NODE;
-
-       _extends(DocumentType, Node);
-
-       function Notation() {}
-       Notation.prototype.nodeType = NOTATION_NODE;
 
-       _extends(Notation, Node);
-
-       function Entity() {}
-       Entity.prototype.nodeType = ENTITY_NODE;
-
-       _extends(Entity, Node);
-
-       function EntityReference() {}
-       EntityReference.prototype.nodeType = ENTITY_REFERENCE_NODE;
-
-       _extends(EntityReference, Node);
-
-       function DocumentFragment() {}
-       DocumentFragment.prototype.nodeName = "#document-fragment";
-       DocumentFragment.prototype.nodeType = DOCUMENT_FRAGMENT_NODE;
-
-       _extends(DocumentFragment, Node);
-
-       function ProcessingInstruction() {}
-
-       ProcessingInstruction.prototype.nodeType = PROCESSING_INSTRUCTION_NODE;
+         function updateLine() {
+           context.history().reset('doneAddLine');
 
-       _extends(ProcessingInstruction, Node);
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return chapter.restart();
+           }
 
-       function XMLSerializer$1() {}
+           var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
 
-       XMLSerializer$1.prototype.serializeToString = function (node, isHtml, nodeFilter) {
-         return nodeSerializeToString.call(node, isHtml, nodeFilter);
-       };
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-       Node.prototype.toString = nodeSerializeToString;
+           context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
+           timeout(function () {
+             var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragMidpoint, padding, context);
 
-       function nodeSerializeToString(isHtml, nodeFilter) {
-         var buf = [];
-         var refNode = this.nodeType == 9 ? this.documentElement : this;
-         var prefix = refNode.prefix;
-         var uri = refNode.namespaceURI;
+             var advance = function advance() {
+               continueTo(addNode);
+             };
 
-         if (uri && prefix == null) {
-           //console.log(prefix)
-           var prefix = refNode.lookupPrefix(uri);
+             reveal(box, helpHtml('intro.lines.update_line'), {
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: advance
+             });
+             context.map().on('move.intro drawn.intro', function () {
+               var padding = 250 * Math.pow(2, context.map().zoom() - 19);
+               var box = pad(woodRoadDragMidpoint, padding, context);
+               reveal(box, helpHtml('intro.lines.update_line'), {
+                 duration: 0,
+                 buttonText: _t.html('intro.ok'),
+                 buttonCallback: advance
+               });
+             });
+           }, msec + 100);
 
-           if (prefix == null) {
-             //isHTML = true;
-             var visibleNamespaces = [{
-               namespace: uri,
-               prefix: null
-             } //{namespace:uri,prefix:''}
-             ];
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
          }
 
-         serializeToString(this, buf, isHtml, nodeFilter, visibleNamespaces); //console.log('###',this.nodeType,uri,prefix,buf.join(''))
+         function addNode() {
+           context.history().reset('doneAddLine');
 
-         return buf.join('');
-       }
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return chapter.restart();
+           }
 
-       function needNamespaceDefine(node, isHTML, visibleNamespaces) {
-         var prefix = node.prefix || '';
-         var uri = node.namespaceURI;
+           var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadAddNode, padding, context);
+           var addNodeString = helpHtml('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+           reveal(box, addNodeString);
+           context.map().on('move.intro drawn.intro', function () {
+             var padding = 40 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadAddNode, padding, context);
+             reveal(box, addNodeString, {
+               duration: 0
+             });
+           });
+           context.history().on('change.intro', function (changed) {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
+             }
 
-         if (!prefix && !uri) {
-           return false;
-         }
+             if (changed.created().length === 1) {
+               timeout(function () {
+                 continueTo(startDragEndpoint);
+               }, 500);
+             }
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') {
+               continueTo(updateLine);
+             }
+           });
 
-         if (prefix === "xml" && uri === "http://www.w3.org/XML/1998/namespace" || uri == 'http://www.w3.org/2000/xmlns/') {
-           return false;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
          }
 
-         var i = visibleNamespaces.length; //console.log('@@@@',node.tagName,prefix,uri,visibleNamespaces)
-
-         while (i--) {
-           var ns = visibleNamespaces[i]; // get namespace prefix
-           //console.log(node.nodeType,node.tagName,ns.prefix,prefix)
-
-           if (ns.prefix == prefix) {
-             return ns.namespace != uri;
+         function startDragEndpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
            }
-         } //console.log(isHTML,uri,prefix=='')
-         //if(isHTML && prefix ==null && uri == 'http://www.w3.org/1999/xhtml'){
-         //    return false;
-         //}
-         //node.flag = '11111'
-         //console.error(3,true,node.flag,node.prefix,node.namespaceURI)
 
+           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragEndpoint, padding, context);
+           var startDragString = helpHtml('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) + helpHtml('intro.lines.drag_to_intersection');
+           reveal(box, startDragString);
+           context.map().on('move.intro drawn.intro', function () {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
+             }
 
-         return true;
-       }
-
-       function serializeToString(node, buf, isHTML, nodeFilter, visibleNamespaces) {
-         if (nodeFilter) {
-           node = nodeFilter(node);
+             var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragEndpoint, padding, context);
+             reveal(box, startDragString, {
+               duration: 0
+             });
+             var entity = context.entity(woodRoadEndID);
 
-           if (node) {
-             if (typeof node == 'string') {
-               buf.push(node);
-               return;
+             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
+               continueTo(finishDragEndpoint);
              }
-           } else {
-             return;
-           } //buf.sort.apply(attrs, attributeSorter);
+           });
 
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
          }
 
-         switch (node.nodeType) {
-           case ELEMENT_NODE:
-             if (!visibleNamespaces) visibleNamespaces = [];
-             var startVisibleNamespaces = visibleNamespaces.length;
-             var attrs = node.attributes;
-             var len = attrs.length;
-             var child = node.firstChild;
-             var nodeName = node.tagName;
-             isHTML = htmlns === node.namespaceURI || isHTML;
-             buf.push('<', nodeName);
-
-             for (var i = 0; i < len; i++) {
-               // add namespaces for attributes
-               var attr = attrs.item(i);
+         function finishDragEndpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-               if (attr.prefix == 'xmlns') {
-                 visibleNamespaces.push({
-                   prefix: attr.localName,
-                   namespace: attr.value
-                 });
-               } else if (attr.nodeName == 'xmlns') {
-                 visibleNamespaces.push({
-                   prefix: '',
-                   namespace: attr.value
-                 });
-               }
+           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragEndpoint, padding, context);
+           var finishDragString = helpHtml('intro.lines.spot_looks_good') + helpHtml('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
+           reveal(box, finishDragString);
+           context.map().on('move.intro drawn.intro', function () {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
              }
 
-             for (var i = 0; i < len; i++) {
-               var attr = attrs.item(i);
-
-               if (needNamespaceDefine(attr, isHTML, visibleNamespaces)) {
-                 var prefix = attr.prefix || '';
-                 var uri = attr.namespaceURI;
-                 var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-                 buf.push(ns, '="', uri, '"');
-                 visibleNamespaces.push({
-                   prefix: prefix,
-                   namespace: uri
-                 });
-               }
-
-               serializeToString(attr, buf, isHTML, nodeFilter, visibleNamespaces);
-             } // add namespace for current node               
-
+             var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragEndpoint, padding, context);
+             reveal(box, finishDragString, {
+               duration: 0
+             });
+             var entity = context.entity(woodRoadEndID);
 
-             if (needNamespaceDefine(node, isHTML, visibleNamespaces)) {
-               var prefix = node.prefix || '';
-               var uri = node.namespaceURI;
-               var ns = prefix ? ' xmlns:' + prefix : " xmlns";
-               buf.push(ns, '="', uri, '"');
-               visibleNamespaces.push({
-                 prefix: prefix,
-                 namespace: uri
-               });
+             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
+               continueTo(startDragEndpoint);
              }
+           });
+           context.on('enter.intro', function () {
+             continueTo(startDragMidpoint);
+           });
 
-             if (child || isHTML && !/^(?:meta|link|img|br|hr|input)$/i.test(nodeName)) {
-               buf.push('>'); //if is cdata child node
-
-               if (isHTML && /^script$/i.test(nodeName)) {
-                 while (child) {
-                   if (child.data) {
-                     buf.push(child.data);
-                   } else {
-                     serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-                   }
-
-                   child = child.nextSibling;
-                 }
-               } else {
-                 while (child) {
-                   serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-                   child = child.nextSibling;
-                 }
-               }
-
-               buf.push('</', nodeName, '>');
-             } else {
-               buf.push('/>');
-             } // remove added visible namespaces
-             //visibleNamespaces.length = startVisibleNamespaces;
-
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-             return;
+         function startDragMidpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-           case DOCUMENT_NODE:
-           case DOCUMENT_FRAGMENT_NODE:
-             var child = node.firstChild;
+           if (context.selectedIDs().indexOf(woodRoadID) === -1) {
+             context.enter(modeSelect(context, [woodRoadID]));
+           }
 
-             while (child) {
-               serializeToString(child, buf, isHTML, nodeFilter, visibleNamespaces);
-               child = child.nextSibling;
+           var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragMidpoint, padding, context);
+           reveal(box, helpHtml('intro.lines.start_drag_midpoint'));
+           context.map().on('move.intro drawn.intro', function () {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
              }
 
-             return;
-
-           case ATTRIBUTE_NODE:
-             return buf.push(' ', node.name, '="', node.value.replace(/[<&"]/g, _xmlEncoder), '"');
-
-           case TEXT_NODE:
-             return buf.push(node.data.replace(/[<&]/g, _xmlEncoder));
-
-           case CDATA_SECTION_NODE:
-             return buf.push('<![CDATA[', node.data, ']]>');
-
-           case COMMENT_NODE:
-             return buf.push("<!--", node.data, "-->");
-
-           case DOCUMENT_TYPE_NODE:
-             var pubid = node.publicId;
-             var sysid = node.systemId;
-             buf.push('<!DOCTYPE ', node.name);
-
-             if (pubid) {
-               buf.push(' PUBLIC "', pubid);
-
-               if (sysid && sysid != '.') {
-                 buf.push('" "', sysid);
-               }
-
-               buf.push('">');
-             } else if (sysid && sysid != '.') {
-               buf.push(' SYSTEM "', sysid, '">');
-             } else {
-               var sub = node.internalSubset;
-
-               if (sub) {
-                 buf.push(" [", sub, "]");
-               }
-
-               buf.push(">");
+             var padding = 80 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragMidpoint, padding, context);
+             reveal(box, helpHtml('intro.lines.start_drag_midpoint'), {
+               duration: 0
+             });
+           });
+           context.history().on('change.intro', function (changed) {
+             if (changed.created().length === 1) {
+               continueTo(continueDragMidpoint);
              }
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') {
+               // keep Wood Road selected so midpoint triangles are drawn..
+               context.enter(modeSelect(context, [woodRoadID]));
+             }
+           });
 
-             return;
-
-           case PROCESSING_INSTRUCTION_NODE:
-             return buf.push("<?", node.target, " ", node.data, "?>");
-
-           case ENTITY_REFERENCE_NODE:
-             return buf.push('&', node.nodeName, ';');
-           //case ENTITY_NODE:
-           //case NOTATION_NODE:
-
-           default:
-             buf.push('??', node.nodeName);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
          }
-       }
-
-       function _importNode(doc, node, deep) {
-         var node2;
-
-         switch (node.nodeType) {
-           case ELEMENT_NODE:
-             node2 = node.cloneNode(false);
-             node2.ownerDocument = doc;
-           //var attrs = node2.attributes;
-           //var len = attrs.length;
-           //for(var i=0;i<len;i++){
-           //node2.setAttributeNodeNS(importNode(doc,attrs.item(i),deep));
-           //}
 
-           case DOCUMENT_FRAGMENT_NODE:
-             break;
+         function continueDragMidpoint() {
+           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+             return continueTo(updateLine);
+           }
 
-           case ATTRIBUTE_NODE:
-             deep = true;
-             break;
-           //case ENTITY_REFERENCE_NODE:
-           //case PROCESSING_INSTRUCTION_NODE:
-           ////case TEXT_NODE:
-           //case CDATA_SECTION_NODE:
-           //case COMMENT_NODE:
-           //  deep = false;
-           //  break;
-           //case DOCUMENT_NODE:
-           //case DOCUMENT_TYPE_NODE:
-           //cannot be imported.
-           //case ENTITY_NODE:
-           //case NOTATION_NODE:
-           //can not hit in level3
-           //default:throw e;
-         }
+           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+           var box = pad(woodRoadDragEndpoint, padding, context);
+           box.height += 400;
 
-         if (!node2) {
-           node2 = node.cloneNode(false); //false
-         }
+           var advance = function advance() {
+             context.history().checkpoint('doneUpdateLine');
+             continueTo(deleteLines);
+           };
 
-         node2.ownerDocument = doc;
-         node2.parentNode = null;
+           reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: advance
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
+               return continueTo(updateLine);
+             }
 
-         if (deep) {
-           var child = node.firstChild;
+             var padding = 100 * Math.pow(2, context.map().zoom() - 19);
+             var box = pad(woodRoadDragEndpoint, padding, context);
+             box.height += 400;
+             reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: advance
+             });
+           });
 
-           while (child) {
-             node2.appendChild(_importNode(doc, child, deep));
-             child = child.nextSibling;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
          }
 
-         return node2;
-       } //
-       //var _relationMap = {firstChild:1,lastChild:1,previousSibling:1,nextSibling:1,
-       //                                      attributes:1,childNodes:1,parentNode:1,documentElement:1,doctype,};
-
-
-       function _cloneNode(doc, node, deep) {
-         var node2 = new node.constructor();
-
-         for (var n in node) {
-           var v = node[n];
+         function deleteLines() {
+           context.history().reset('doneUpdateLine');
+           context.enter(modeBrowse(context));
 
-           if (_typeof(v) != 'object') {
-             if (v != node2[n]) {
-               node2[n] = v;
-             }
+           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return chapter.restart();
            }
-         }
 
-         if (node.childNodes) {
-           node2.childNodes = new NodeList();
-         }
+           var msec = transitionTime(deleteLinesLoc, context.map().center());
 
-         node2.ownerDocument = doc;
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
+           }
 
-         switch (node2.nodeType) {
-           case ELEMENT_NODE:
-             var attrs = node.attributes;
-             var attrs2 = node2.attributes = new NamedNodeMap();
-             var len = attrs.length;
-             attrs2._ownerElement = node2;
+           context.map().centerZoomEase(deleteLinesLoc, 18, msec);
+           timeout(function () {
+             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(deleteLinesLoc, padding, context);
+             box.top -= 200;
+             box.height += 400;
 
-             for (var i = 0; i < len; i++) {
-               node2.setAttributeNode(_cloneNode(doc, attrs.item(i), true));
-             }
+             var advance = function advance() {
+               continueTo(rightClickIntersection);
+             };
 
-             break;
+             reveal(box, helpHtml('intro.lines.delete_lines', {
+               street: _t('intro.graph.name.12th-avenue')
+             }), {
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: advance
+             });
+             context.map().on('move.intro drawn.intro', function () {
+               var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+               var box = pad(deleteLinesLoc, padding, context);
+               box.top -= 200;
+               box.height += 400;
+               reveal(box, helpHtml('intro.lines.delete_lines', {
+                 street: _t('intro.graph.name.12th-avenue')
+               }), {
+                 duration: 0,
+                 buttonText: _t.html('intro.ok'),
+                 buttonCallback: advance
+               });
+             });
+             context.history().on('change.intro', function () {
+               timeout(function () {
+                 continueTo(deleteLines);
+               }, 500); // after any transition (e.g. if user deleted intersection)
+             });
+           }, msec + 100);
 
-           case ATTRIBUTE_NODE:
-             deep = true;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
 
-         if (deep) {
-           var child = node.firstChild;
+         function rightClickIntersection() {
+           context.history().reset('doneUpdateLine');
+           context.enter(modeBrowse(context));
+           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+           var rightClickString = helpHtml('intro.lines.split_street', {
+             street1: _t('intro.graph.name.11th-avenue'),
+             street2: _t('intro.graph.name.washington-street')
+           }) + helpHtml('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
+           timeout(function () {
+             var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(eleventhAvenueEnd, padding, context);
+             reveal(box, rightClickString);
+             context.map().on('move.intro drawn.intro', function () {
+               var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+               var box = pad(eleventhAvenueEnd, padding, context);
+               reveal(box, rightClickString, {
+                 duration: 0
+               });
+             });
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'select') return;
+               var ids = context.selectedIDs();
+               if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) return;
+               timeout(function () {
+                 var node = selectMenuItem(context, 'split').node();
+                 if (!node) return;
+                 continueTo(splitIntersection);
+               }, 50); // after menu visible
+             });
+             context.history().on('change.intro', function () {
+               timeout(function () {
+                 continueTo(deleteLines);
+               }, 300); // after any transition (e.g. if user deleted intersection)
+             });
+           }, 600);
 
-           while (child) {
-             node2.appendChild(_cloneNode(doc, child, deep));
-             child = child.nextSibling;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
 
-         return node2;
-       }
-
-       function __set__(object, key, value) {
-         object[key] = value;
-       } //do dynamic
-
+         function splitIntersection() {
+           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(deleteLines);
+           }
 
-       try {
-         if (Object.defineProperty) {
-           var getTextContent = function getTextContent(node) {
-             switch (node.nodeType) {
-               case ELEMENT_NODE:
-               case DOCUMENT_FRAGMENT_NODE:
-                 var buf = [];
-                 node = node.firstChild;
-
-                 while (node) {
-                   if (node.nodeType !== 7 && node.nodeType !== 8) {
-                     buf.push(getTextContent(node));
-                   }
+           var node = selectMenuItem(context, 'split').node();
 
-                   node = node.nextSibling;
-                 }
+           if (!node) {
+             return continueTo(rightClickIntersection);
+           }
 
-                 return buf.join('');
+           var wasChanged = false;
+           _washingtonSegmentID = null;
+           reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+             street: _t('intro.graph.name.washington-street')
+           }), {
+             padding: 50
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             var node = selectMenuItem(context, 'split').node();
 
-               default:
-                 return node.nodeValue;
+             if (!wasChanged && !node) {
+               return continueTo(rightClickIntersection);
              }
-           };
-
-           Object.defineProperty(LiveNodeList.prototype, 'length', {
-             get: function get() {
-               _updateLiveList(this);
 
-               return this.$$length;
-             }
+             reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
+               street: _t('intro.graph.name.washington-street')
+             }), {
+               duration: 0,
+               padding: 50
+             });
            });
-           Object.defineProperty(Node.prototype, 'textContent', {
-             get: function get() {
-               return getTextContent(this);
-             },
-             set: function set(data) {
-               switch (this.nodeType) {
-                 case ELEMENT_NODE:
-                 case DOCUMENT_FRAGMENT_NODE:
-                   while (this.firstChild) {
-                     this.removeChild(this.firstChild);
-                   }
-
-                   if (data || String(data)) {
-                     this.appendChild(this.ownerDocument.createTextNode(data));
-                   }
-
-                   break;
-
-                 default:
-                   //TODO:
-                   this.data = data;
-                   this.value = data;
-                   this.nodeValue = data;
+           context.history().on('change.intro', function (changed) {
+             wasChanged = true;
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.split.annotation.line', {
+                 n: 1
+               })) {
+                 _washingtonSegmentID = changed.created()[0].id;
+                 continueTo(didSplit);
+               } else {
+                 _washingtonSegmentID = null;
+                 continueTo(retrySplit);
                }
-             }
+             }, 300); // after any transition (e.g. if user deleted intersection)
            });
 
-           __set__ = function __set__(object, key, value) {
-             //console.log(value)
-             object['$$' + key] = value;
-           };
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
-       } catch (e) {//ie8
-       } //if(typeof require == 'function'){
 
+         function retrySplit() {
+           context.enter(modeBrowse(context));
+           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
 
-       var DOMImplementation_1 = DOMImplementation;
-       var XMLSerializer_1 = XMLSerializer$1; //}
-
-       var dom = {
-         DOMImplementation: DOMImplementation_1,
-         XMLSerializer: XMLSerializer_1
-       };
-
-       var domParser = createCommonjsModule(function (module, exports) {
-         function DOMParser(options) {
-           this.options = options || {
-             locator: {}
+           var advance = function advance() {
+             continueTo(rightClickIntersection);
            };
-         }
 
-         DOMParser.prototype.parseFromString = function (source, mimeType) {
-           var options = this.options;
-           var sax = new XMLReader();
-           var domBuilder = options.domBuilder || new DOMHandler(); //contentHandler and LexicalHandler
-
-           var errorHandler = options.errorHandler;
-           var locator = options.locator;
-           var defaultNSMap = options.xmlns || {};
-           var entityMap = {
-             'lt': '<',
-             'gt': '>',
-             'amp': '&',
-             'quot': '"',
-             'apos': "'"
-           };
+           var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(eleventhAvenueEnd, padding, context);
+           reveal(box, helpHtml('intro.lines.retry_split'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: advance
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             var padding = 60 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(eleventhAvenueEnd, padding, context);
+             reveal(box, helpHtml('intro.lines.retry_split'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: advance
+             });
+           });
 
-           if (locator) {
-             domBuilder.setDocumentLocator(locator);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
            }
+         }
 
-           sax.errorHandler = buildErrorHandler(errorHandler, domBuilder, locator);
-           sax.domBuilder = options.domBuilder || domBuilder;
-
-           if (/\/x?html?$/.test(mimeType)) {
-             entityMap.nbsp = '\xa0';
-             entityMap.copy = '\xa9';
-             defaultNSMap[''] = 'http://www.w3.org/1999/xhtml';
+         function didSplit() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
            }
 
-           defaultNSMap.xml = defaultNSMap.xml || 'http://www.w3.org/XML/1998/namespace';
-
-           if (source) {
-             sax.parse(source, defaultNSMap, entityMap);
-           } else {
-             sax.errorHandler.error("invalid doc source");
-           }
+           var ids = context.selectedIDs();
+           var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
+           var street = _t('intro.graph.name.washington-street');
+           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(twelfthAvenue, padding, context);
+           box.width = box.width / 2;
+           reveal(box, helpHtml(string, {
+             street1: street,
+             street2: street
+           }), {
+             duration: 500
+           });
+           timeout(function () {
+             context.map().centerZoomEase(twelfthAvenue, 18, 500);
+             context.map().on('move.intro drawn.intro', function () {
+               var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+               var box = pad(twelfthAvenue, padding, context);
+               box.width = box.width / 2;
+               reveal(box, helpHtml(string, {
+                 street1: street,
+                 street2: street
+               }), {
+                 duration: 0
+               });
+             });
+           }, 600); // after initial reveal and curtain cut
 
-           return domBuilder.doc;
-         };
+           context.on('enter.intro', function () {
+             var ids = context.selectedIDs();
 
-         function buildErrorHandler(errorImpl, domBuilder, locator) {
-           if (!errorImpl) {
-             if (domBuilder instanceof DOMHandler) {
-               return domBuilder;
+             if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
+               continueTo(multiSelect);
              }
-
-             errorImpl = domBuilder;
-           }
-
-           var errorHandler = {};
-           var isCallback = errorImpl instanceof Function;
-           locator = locator || {};
-
-           function build(key) {
-             var fn = errorImpl[key];
-
-             if (!fn && isCallback) {
-               fn = errorImpl.length == 2 ? function (msg) {
-                 errorImpl(key, msg);
-               } : errorImpl;
+           });
+           context.history().on('change.intro', function () {
+             if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+               return continueTo(rightClickIntersection);
              }
+           });
 
-             errorHandler[key] = fn && function (msg) {
-               fn('[xmldom ' + key + ']\t' + msg + _locator(locator));
-             } || function () {};
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
-
-           build('warning');
-           build('error');
-           build('fatalError');
-           return errorHandler;
-         } //console.log('#\n\n\n\n\n\n\n####')
-
-         /**
-          * +ContentHandler+ErrorHandler
-          * +LexicalHandler+EntityResolver2
-          * -DeclHandler-DTDHandler 
-          * 
-          * DefaultHandler:EntityResolver, DTDHandler, ContentHandler, ErrorHandler
-          * DefaultHandler2:DefaultHandler,LexicalHandler, DeclHandler, EntityResolver2
-          * @link http://www.saxproject.org/apidoc/org/xml/sax/helpers/DefaultHandler.html
-          */
-
-
-         function DOMHandler() {
-           this.cdata = false;
          }
 
-         function position(locator, node) {
-           node.lineNumber = locator.lineNumber;
-           node.columnNumber = locator.columnNumber;
-         }
-         /**
-          * @see org.xml.sax.ContentHandler#startDocument
-          * @link http://www.saxproject.org/apidoc/org/xml/sax/ContentHandler.html
-          */
+         function multiSelect() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
+           }
 
+           var ids = context.selectedIDs();
+           var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
+           var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+
+           if (hasWashington && hasTwelfth) {
+             return continueTo(multiRightClick);
+           } else if (!hasWashington && !hasTwelfth) {
+             return continueTo(didSplit);
+           }
 
-         DOMHandler.prototype = {
-           startDocument: function startDocument() {
-             this.doc = new DOMImplementation().createDocument(null, null, null);
+           context.map().centerZoomEase(twelfthAvenue, 18, 500);
+           timeout(function () {
+             var selected, other, padding, box;
 
-             if (this.locator) {
-               this.doc.documentURI = this.locator.systemId;
-             }
-           },
-           startElement: function startElement(namespaceURI, localName, qName, attrs) {
-             var doc = this.doc;
-             var el = doc.createElementNS(namespaceURI, qName || localName);
-             var len = attrs.length;
-             appendElement(this, el);
-             this.currentElement = el;
-             this.locator && position(this.locator, el);
-
-             for (var i = 0; i < len; i++) {
-               var namespaceURI = attrs.getURI(i);
-               var value = attrs.getValue(i);
-               var qName = attrs.getQName(i);
-               var attr = doc.createAttributeNS(namespaceURI, qName);
-               this.locator && position(attrs.getLocator(i), attr);
-               attr.value = attr.nodeValue = value;
-               el.setAttributeNode(attr);
+             if (hasWashington) {
+               selected = _t('intro.graph.name.washington-street');
+               other = _t('intro.graph.name.12th-avenue');
+               padding = 60 * Math.pow(2, context.map().zoom() - 18);
+               box = pad(twelfthAvenueEnd, padding, context);
+               box.width *= 3;
+             } else {
+               selected = _t('intro.graph.name.12th-avenue');
+               other = _t('intro.graph.name.washington-street');
+               padding = 200 * Math.pow(2, context.map().zoom() - 18);
+               box = pad(twelfthAvenue, padding, context);
+               box.width /= 2;
              }
-           },
-           endElement: function endElement(namespaceURI, localName, qName) {
-             var current = this.currentElement;
-             var tagName = current.tagName;
-             this.currentElement = current.parentNode;
-           },
-           startPrefixMapping: function startPrefixMapping(prefix, uri) {},
-           endPrefixMapping: function endPrefixMapping(prefix) {},
-           processingInstruction: function processingInstruction(target, data) {
-             var ins = this.doc.createProcessingInstruction(target, data);
-             this.locator && position(this.locator, ins);
-             appendElement(this, ins);
-           },
-           ignorableWhitespace: function ignorableWhitespace(ch, start, length) {},
-           characters: function characters(chars, start, length) {
-             chars = _toString.apply(this, arguments); //console.log(chars)
 
-             if (chars) {
-               if (this.cdata) {
-                 var charNode = this.doc.createCDATASection(chars);
+             reveal(box, helpHtml('intro.lines.multi_select', {
+               selected: selected,
+               other1: other
+             }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+               selected: selected,
+               other2: other
+             }));
+             context.map().on('move.intro drawn.intro', function () {
+               if (hasWashington) {
+                 selected = _t('intro.graph.name.washington-street');
+                 other = _t('intro.graph.name.12th-avenue');
+                 padding = 60 * Math.pow(2, context.map().zoom() - 18);
+                 box = pad(twelfthAvenueEnd, padding, context);
+                 box.width *= 3;
                } else {
-                 var charNode = this.doc.createTextNode(chars);
+                 selected = _t('intro.graph.name.12th-avenue');
+                 other = _t('intro.graph.name.washington-street');
+                 padding = 200 * Math.pow(2, context.map().zoom() - 18);
+                 box = pad(twelfthAvenue, padding, context);
+                 box.width /= 2;
                }
 
-               if (this.currentElement) {
-                 this.currentElement.appendChild(charNode);
-               } else if (/^\s*$/.test(chars)) {
-                 this.doc.appendChild(charNode); //process xml
+               reveal(box, helpHtml('intro.lines.multi_select', {
+                 selected: selected,
+                 other1: other
+               }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
+                 selected: selected,
+                 other2: other
+               }), {
+                 duration: 0
+               });
+             });
+             context.on('enter.intro', function () {
+               continueTo(multiSelect);
+             });
+             context.history().on('change.intro', function () {
+               if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+                 return continueTo(rightClickIntersection);
                }
+             });
+           }, 600);
 
-               this.locator && position(this.locator, charNode);
-             }
-           },
-           skippedEntity: function skippedEntity(name) {},
-           endDocument: function endDocument() {
-             this.doc.normalize();
-           },
-           setDocumentLocator: function setDocumentLocator(locator) {
-             if (this.locator = locator) {
-               // && !('lineNumber' in locator)){
-               locator.lineNumber = 0;
-             }
-           },
-           //LexicalHandler
-           comment: function comment(chars, start, length) {
-             chars = _toString.apply(this, arguments);
-             var comm = this.doc.createComment(chars);
-             this.locator && position(this.locator, comm);
-             appendElement(this, comm);
-           },
-           startCDATA: function startCDATA() {
-             //used in characters() methods
-             this.cdata = true;
-           },
-           endCDATA: function endCDATA() {
-             this.cdata = false;
-           },
-           startDTD: function startDTD(name, publicId, systemId) {
-             var impl = this.doc.implementation;
-
-             if (impl && impl.createDocumentType) {
-               var dt = impl.createDocumentType(name, publicId, systemId);
-               this.locator && position(this.locator, dt);
-               appendElement(this, dt);
-             }
-           },
-
-           /**
-            * @see org.xml.sax.ErrorHandler
-            * @link http://www.saxproject.org/apidoc/org/xml/sax/ErrorHandler.html
-            */
-           warning: function warning(error) {
-             console.warn('[xmldom warning]\t' + error, _locator(this.locator));
-           },
-           error: function error(_error) {
-             console.error('[xmldom error]\t' + _error, _locator(this.locator));
-           },
-           fatalError: function fatalError(error) {
-             console.error('[xmldom fatalError]\t' + error, _locator(this.locator));
-             throw error;
-           }
-         };
-
-         function _locator(l) {
-           if (l) {
-             return '\n@' + (l.systemId || '') + '#[line:' + l.lineNumber + ',col:' + l.columnNumber + ']';
-           }
-         }
-
-         function _toString(chars, start, length) {
-           if (typeof chars == 'string') {
-             return chars.substr(start, length);
-           } else {
-             //java sax connect width xmldom on rhino(what about: "? && !(chars instanceof String)")
-             if (chars.length >= start + length || start) {
-               return new java.lang.String(chars, start, length) + '';
-             }
-
-             return chars;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
-         /*
-          * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/LexicalHandler.html
-          * used method of org.xml.sax.ext.LexicalHandler:
-          *  #comment(chars, start, length)
-          *  #startCDATA()
-          *  #endCDATA()
-          *  #startDTD(name, publicId, systemId)
-          *
-          *
-          * IGNORED method of org.xml.sax.ext.LexicalHandler:
-          *  #endDTD()
-          *  #startEntity(name)
-          *  #endEntity(name)
-          *
-          *
-          * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/DeclHandler.html
-          * IGNORED method of org.xml.sax.ext.DeclHandler
-          *    #attributeDecl(eName, aName, type, mode, value)
-          *  #elementDecl(name, model)
-          *  #externalEntityDecl(name, publicId, systemId)
-          *  #internalEntityDecl(name, value)
-          * @link http://www.saxproject.org/apidoc/org/xml/sax/ext/EntityResolver2.html
-          * IGNORED method of org.xml.sax.EntityResolver2
-          *  #resolveEntity(String name,String publicId,String baseURI,String systemId)
-          *  #resolveEntity(publicId, systemId)
-          *  #getExternalSubset(name, baseURI)
-          * @link http://www.saxproject.org/apidoc/org/xml/sax/DTDHandler.html
-          * IGNORED method of org.xml.sax.DTDHandler
-          *  #notationDecl(name, publicId, systemId) {};
-          *  #unparsedEntityDecl(name, publicId, systemId, notationName) {};
-          */
-
-
-         "endDTD,startEntity,endEntity,attributeDecl,elementDecl,externalEntityDecl,internalEntityDecl,resolveEntity,getExternalSubset,notationDecl,unparsedEntityDecl".replace(/\w+/g, function (key) {
-           DOMHandler.prototype[key] = function () {
-             return null;
-           };
-         });
-         /* Private static helpers treated below as private instance methods, so don't need to add these to the public API; we might use a Relator to also get rid of non-standard public properties */
 
-         function appendElement(hander, node) {
-           if (!hander.currentElement) {
-             hander.doc.appendChild(node);
-           } else {
-             hander.currentElement.appendChild(node);
+         function multiRightClick() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
            }
-         } //appendChild and setAttributeNS are preformance key
-         //if(typeof require == 'function'){
-
 
-         var XMLReader = sax.XMLReader;
-         var DOMImplementation = exports.DOMImplementation = dom.DOMImplementation;
-         exports.XMLSerializer = dom.XMLSerializer;
-         exports.DOMParser = DOMParser; //}
-       });
-
-       var togeojson = createCommonjsModule(function (module, exports) {
-         var toGeoJSON = function () {
-
-           var removeSpace = /\s*/g,
-               trimSpace = /^\s*|\s*$/g,
-               splitSpace = /\s+/; // generate a short, numeric hash of a string
-
-           function okhash(x) {
-             if (!x || !x.length) return 0;
+           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(twelfthAvenue, padding, context);
+           var rightClickString = helpHtml('intro.lines.multi_select_success') + helpHtml('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
+           reveal(box, rightClickString);
+           context.map().on('move.intro drawn.intro', function () {
+             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+             var box = pad(twelfthAvenue, padding, context);
+             reveal(box, rightClickString, {
+               duration: 0
+             });
+           });
+           context.ui().editMenu().on('toggled.intro', function (open) {
+             if (!open) return;
+             timeout(function () {
+               var ids = context.selectedIDs();
 
-             for (var i = 0, h = 0; i < x.length; i++) {
-               h = (h << 5) - h + x.charCodeAt(i) | 0;
+               if (ids.length === 2 && ids.indexOf(twelfthAvenueID) !== -1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+                 var node = selectMenuItem(context, 'delete').node();
+                 if (!node) return;
+                 continueTo(multiDelete);
+               } else if (ids.length === 1 && ids.indexOf(_washingtonSegmentID) !== -1) {
+                 return continueTo(multiSelect);
+               } else {
+                 return continueTo(didSplit);
+               }
+             }, 300); // after edit menu visible
+           });
+           context.history().on('change.intro', function () {
+             if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+               return continueTo(rightClickIntersection);
              }
+           });
 
-             return h;
-           } // all Y children of X
-
-
-           function get(x, y) {
-             return x.getElementsByTagName(y);
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.ui().editMenu().on('toggled.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
+         }
 
-           function attr(x, y) {
-             return x.getAttribute(y);
+         function multiDelete() {
+           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
+             return continueTo(rightClickIntersection);
            }
 
-           function attrf(x, y) {
-             return parseFloat(attr(x, y));
-           } // one Y child of X, if any, otherwise null
-
-
-           function get1(x, y) {
-             var n = get(x, y);
-             return n.length ? n[0] : null;
-           } // https://developer.mozilla.org/en-US/docs/Web/API/Node.normalize
-
-
-           function norm(el) {
-             if (el.normalize) {
-               el.normalize();
-             }
-
-             return el;
-           } // cast array x into numbers
-
-
-           function numarray(x) {
-             for (var j = 0, o = []; j < x.length; j++) {
-               o[j] = parseFloat(x[j]);
+           var node = selectMenuItem(context, 'delete').node();
+           if (!node) return continueTo(multiRightClick);
+           reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+             padding: 50
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
+               duration: 0,
+               padding: 50
+             });
+           });
+           context.on('exit.intro', function () {
+             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+               return continueTo(multiSelect); // left select mode but roads still exist
              }
-
-             return o;
-           } // get the content of a text node, if any
-
-
-           function nodeVal(x) {
-             if (x) {
-               norm(x);
+           });
+           context.history().on('change.intro', function () {
+             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
+               continueTo(retryDelete); // changed something but roads still exist
+             } else {
+               continueTo(play);
              }
+           });
 
-             return x && x.textContent || '';
-           } // get the contents of multiple text nodes, if present
-
-
-           function getMulti(x, ys) {
-             var o = {},
-                 n,
-                 k;
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('exit.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-             for (k = 0; k < ys.length; k++) {
-               n = get1(x, ys[k]);
-               if (n) o[ys[k]] = nodeVal(n);
+         function retryDelete() {
+           context.enter(modeBrowse(context));
+           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
+           var box = pad(twelfthAvenue, padding, context);
+           reveal(box, helpHtml('intro.lines.retry_delete'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(multiSelect);
              }
+           });
 
-             return o;
-           } // add properties of Y to X, overwriting if present in both
-
+           function continueTo(nextStep) {
+             nextStep();
+           }
+         }
 
-           function extend(x, y) {
-             for (var k in y) {
-               x[k] = y[k];
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.lines.play', {
+             next: _t('intro.buildings.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-building',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
              }
-           } // get one coordinate from a coordinate array, if any
-
+           });
+         }
 
-           function coord1(v) {
-             return numarray(v.replace(removeSpace, '').split(','));
-           } // get all coordinates from a coordinate array as [[],[]]
+         chapter.enter = function () {
+           addLine();
+         };
 
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           select(window).on('pointerdown.intro mousedown.intro', null, true);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', null);
+           context.container().select('.preset-list-button').on('click.intro', null);
+         };
 
-           function coord(v) {
-             var coords = v.replace(trimSpace, '').split(splitSpace),
-                 o = [];
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-             for (var i = 0; i < coords.length; i++) {
-               o.push(coord1(coords[i]));
-             }
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-             return o;
-           }
+       function uiIntroBuilding(context, reveal) {
+         var dispatch = dispatch$8('done');
+         var house = [-85.62815, 41.95638];
+         var tank = [-85.62732, 41.95347];
+         var buildingCatetory = _mainPresetIndex.item('category-building');
+         var housePreset = _mainPresetIndex.item('building/house');
+         var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
+         var timeouts = [];
+         var _houseID = null;
+         var _tankID = null;
+         var chapter = {
+           title: 'intro.buildings.title'
+         };
 
-           function coordPair(x) {
-             var ll = [attrf(x, 'lon'), attrf(x, 'lat')],
-                 ele = get1(x, 'ele'),
-                 // handle namespaced attribute in browser
-             heartRate = get1(x, 'gpxtpx:hr') || get1(x, 'hr'),
-                 time = get1(x, 'time'),
-                 e;
+         function timeout(f, t) {
+           timeouts.push(window.setTimeout(f, t));
+         }
 
-             if (ele) {
-               e = parseFloat(nodeVal(ele));
+         function eventCancel(d3_event) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+         }
 
-               if (!isNaN(e)) {
-                 ll.push(e);
-               }
-             }
+         function revealHouse(center, text, options) {
+           var padding = 160 * Math.pow(2, context.map().zoom() - 20);
+           var box = pad(center, padding, context);
+           reveal(box, text, options);
+         }
 
-             return {
-               coordinates: ll,
-               time: time ? nodeVal(time) : null,
-               heartRate: heartRate ? parseFloat(nodeVal(heartRate)) : null
-             };
-           } // create a new feature collection parent object
+         function revealTank(center, text, options) {
+           var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
+           var box = pad(center, padding, context);
+           reveal(box, text, options);
+         }
 
+         function addHouse() {
+           context.enter(modeBrowse(context));
+           context.history().reset('initial');
+           _houseID = null;
+           var msec = transitionTime(house, context.map().center());
 
-           function fc() {
-             return {
-               type: 'FeatureCollection',
-               features: []
-             };
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           var serializer;
+           context.map().centerZoomEase(house, 19, msec);
+           timeout(function () {
+             var tooltip = reveal('button.add-area', helpHtml('intro.buildings.add_building'));
+             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-buildings');
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-area') return;
+               continueTo(startHouse);
+             });
+           }, msec + 100);
 
-           if (typeof XMLSerializer !== 'undefined') {
-             /* istanbul ignore next */
-             serializer = new XMLSerializer(); // only require xmldom in a node environment
-           } else if ( (typeof process === "undefined" ? "undefined" : _typeof(process)) === 'object' && !process.browser) {
-             serializer = new domParser.XMLSerializer();
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
            }
+         }
 
-           function xml2str(str) {
-             // IE9 will create a new XMLSerializer but it'll crash immediately.
-             // This line is ignored because we don't run coverage tests in IE9
-
-             /* istanbul ignore next */
-             if (str.xml !== undefined) return str.xml;
-             return serializer.serializeToString(str);
+         function startHouse() {
+           if (context.mode().id !== 'add-area') {
+             return continueTo(addHouse);
            }
 
-           var t = {
-             kml: function kml(doc) {
-               var gj = fc(),
-                   // styleindex keeps track of hashed styles in order to match features
-               styleIndex = {},
-                   styleByHash = {},
-                   // stylemapindex keeps track of style maps to expose in properties
-               styleMapIndex = {},
-                   // atomic geospatial types supported by KML - MultiGeometry is
-               // handled separately
-               geotypes = ['Polygon', 'LineString', 'Point', 'Track', 'gx:Track'],
-                   // all root placemarks in the file
-               placemarks = get(doc, 'Placemark'),
-                   styles = get(doc, 'Style'),
-                   styleMaps = get(doc, 'StyleMap');
-
-               for (var k = 0; k < styles.length; k++) {
-                 var hash = okhash(xml2str(styles[k])).toString(16);
-                 styleIndex['#' + attr(styles[k], 'id')] = hash;
-                 styleByHash[hash] = styles[k];
-               }
-
-               for (var l = 0; l < styleMaps.length; l++) {
-                 styleIndex['#' + attr(styleMaps[l], 'id')] = okhash(xml2str(styleMaps[l])).toString(16);
-                 var pairs = get(styleMaps[l], 'Pair');
-                 var pairsMap = {};
-
-                 for (var m = 0; m < pairs.length; m++) {
-                   pairsMap[nodeVal(get1(pairs[m], 'key'))] = nodeVal(get1(pairs[m], 'styleUrl'));
-                 }
-
-                 styleMapIndex['#' + attr(styleMaps[l], 'id')] = pairsMap;
-               }
-
-               for (var j = 0; j < placemarks.length; j++) {
-                 gj.features = gj.features.concat(getPlacemark(placemarks[j]));
-               }
-
-               function kmlColor(v) {
-                 var color, opacity;
-                 v = v || '';
-
-                 if (v.substr(0, 1) === '#') {
-                   v = v.substr(1);
-                 }
-
-                 if (v.length === 6 || v.length === 3) {
-                   color = v;
-                 }
-
-                 if (v.length === 8) {
-                   opacity = parseInt(v.substr(0, 2), 16) / 255;
-                   color = '#' + v.substr(6, 2) + v.substr(4, 2) + v.substr(2, 2);
-                 }
-
-                 return [color, isNaN(opacity) ? undefined : opacity];
-               }
-
-               function gxCoord(v) {
-                 return numarray(v.split(' '));
-               }
-
-               function gxCoords(root) {
-                 var elems = get(root, 'coord'),
-                     coords = [],
-                     times = [];
-                 if (elems.length === 0) elems = get(root, 'gx:coord');
-
-                 for (var i = 0; i < elems.length; i++) {
-                   coords.push(gxCoord(nodeVal(elems[i])));
-                 }
-
-                 var timeElems = get(root, 'when');
-
-                 for (var j = 0; j < timeElems.length; j++) {
-                   times.push(nodeVal(timeElems[j]));
-                 }
-
-                 return {
-                   coords: coords,
-                   times: times
-                 };
-               }
-
-               function getGeometry(root) {
-                 var geomNode,
-                     geomNodes,
-                     i,
-                     j,
-                     k,
-                     geoms = [],
-                     coordTimes = [];
-
-                 if (get1(root, 'MultiGeometry')) {
-                   return getGeometry(get1(root, 'MultiGeometry'));
-                 }
-
-                 if (get1(root, 'MultiTrack')) {
-                   return getGeometry(get1(root, 'MultiTrack'));
-                 }
-
-                 if (get1(root, 'gx:MultiTrack')) {
-                   return getGeometry(get1(root, 'gx:MultiTrack'));
-                 }
-
-                 for (i = 0; i < geotypes.length; i++) {
-                   geomNodes = get(root, geotypes[i]);
-
-                   if (geomNodes) {
-                     for (j = 0; j < geomNodes.length; j++) {
-                       geomNode = geomNodes[j];
-
-                       if (geotypes[i] === 'Point') {
-                         geoms.push({
-                           type: 'Point',
-                           coordinates: coord1(nodeVal(get1(geomNode, 'coordinates')))
-                         });
-                       } else if (geotypes[i] === 'LineString') {
-                         geoms.push({
-                           type: 'LineString',
-                           coordinates: coord(nodeVal(get1(geomNode, 'coordinates')))
-                         });
-                       } else if (geotypes[i] === 'Polygon') {
-                         var rings = get(geomNode, 'LinearRing'),
-                             coords = [];
-
-                         for (k = 0; k < rings.length; k++) {
-                           coords.push(coord(nodeVal(get1(rings[k], 'coordinates'))));
-                         }
-
-                         geoms.push({
-                           type: 'Polygon',
-                           coordinates: coords
-                         });
-                       } else if (geotypes[i] === 'Track' || geotypes[i] === 'gx:Track') {
-                         var track = gxCoords(geomNode);
-                         geoms.push({
-                           type: 'LineString',
-                           coordinates: track.coords
-                         });
-                         if (track.times.length) coordTimes.push(track.times);
-                       }
-                     }
-                   }
-                 }
-
-                 return {
-                   geoms: geoms,
-                   coordTimes: coordTimes
-                 };
-               }
-
-               function getPlacemark(root) {
-                 var geomsAndTimes = getGeometry(root),
-                     i,
-                     properties = {},
-                     name = nodeVal(get1(root, 'name')),
-                     address = nodeVal(get1(root, 'address')),
-                     styleUrl = nodeVal(get1(root, 'styleUrl')),
-                     description = nodeVal(get1(root, 'description')),
-                     timeSpan = get1(root, 'TimeSpan'),
-                     timeStamp = get1(root, 'TimeStamp'),
-                     extendedData = get1(root, 'ExtendedData'),
-                     lineStyle = get1(root, 'LineStyle'),
-                     polyStyle = get1(root, 'PolyStyle'),
-                     visibility = get1(root, 'visibility');
-                 if (!geomsAndTimes.geoms.length) return [];
-                 if (name) properties.name = name;
-                 if (address) properties.address = address;
-
-                 if (styleUrl) {
-                   if (styleUrl[0] !== '#') {
-                     styleUrl = '#' + styleUrl;
-                   }
-
-                   properties.styleUrl = styleUrl;
-
-                   if (styleIndex[styleUrl]) {
-                     properties.styleHash = styleIndex[styleUrl];
-                   }
-
-                   if (styleMapIndex[styleUrl]) {
-                     properties.styleMapHash = styleMapIndex[styleUrl];
-                     properties.styleHash = styleIndex[styleMapIndex[styleUrl].normal];
-                   } // Try to populate the lineStyle or polyStyle since we got the style hash
-
-
-                   var style = styleByHash[properties.styleHash];
-
-                   if (style) {
-                     if (!lineStyle) lineStyle = get1(style, 'LineStyle');
-                     if (!polyStyle) polyStyle = get1(style, 'PolyStyle');
-                   }
-                 }
-
-                 if (description) properties.description = description;
-
-                 if (timeSpan) {
-                   var begin = nodeVal(get1(timeSpan, 'begin'));
-                   var end = nodeVal(get1(timeSpan, 'end'));
-                   properties.timespan = {
-                     begin: begin,
-                     end: end
-                   };
-                 }
-
-                 if (timeStamp) {
-                   properties.timestamp = nodeVal(get1(timeStamp, 'when'));
-                 }
-
-                 if (lineStyle) {
-                   var linestyles = kmlColor(nodeVal(get1(lineStyle, 'color'))),
-                       color = linestyles[0],
-                       opacity = linestyles[1],
-                       width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-                   if (color) properties.stroke = color;
-                   if (!isNaN(opacity)) properties['stroke-opacity'] = opacity;
-                   if (!isNaN(width)) properties['stroke-width'] = width;
-                 }
-
-                 if (polyStyle) {
-                   var polystyles = kmlColor(nodeVal(get1(polyStyle, 'color'))),
-                       pcolor = polystyles[0],
-                       popacity = polystyles[1],
-                       fill = nodeVal(get1(polyStyle, 'fill')),
-                       outline = nodeVal(get1(polyStyle, 'outline'));
-                   if (pcolor) properties.fill = pcolor;
-                   if (!isNaN(popacity)) properties['fill-opacity'] = popacity;
-                   if (fill) properties['fill-opacity'] = fill === '1' ? properties['fill-opacity'] || 1 : 0;
-                   if (outline) properties['stroke-opacity'] = outline === '1' ? properties['stroke-opacity'] || 1 : 0;
-                 }
-
-                 if (extendedData) {
-                   var datas = get(extendedData, 'Data'),
-                       simpleDatas = get(extendedData, 'SimpleData');
-
-                   for (i = 0; i < datas.length; i++) {
-                     properties[datas[i].getAttribute('name')] = nodeVal(get1(datas[i], 'value'));
-                   }
-
-                   for (i = 0; i < simpleDatas.length; i++) {
-                     properties[simpleDatas[i].getAttribute('name')] = nodeVal(simpleDatas[i]);
-                   }
-                 }
-
-                 if (visibility) {
-                   properties.visibility = nodeVal(visibility);
-                 }
+           _houseID = null;
+           context.map().zoomEase(20, 500);
+           timeout(function () {
+             var startString = helpHtml('intro.buildings.start_building') + helpHtml('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+             revealHouse(house, startString);
+             context.map().on('move.intro drawn.intro', function () {
+               revealHouse(house, startString, {
+                 duration: 0
+               });
+             });
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'draw-area') return chapter.restart();
+               continueTo(continueHouse);
+             });
+           }, 550); // after easing
 
-                 if (geomsAndTimes.coordTimes.length) {
-                   properties.coordTimes = geomsAndTimes.coordTimes.length === 1 ? geomsAndTimes.coordTimes[0] : geomsAndTimes.coordTimes;
-                 }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-                 var feature = {
-                   type: 'Feature',
-                   geometry: geomsAndTimes.geoms.length === 1 ? geomsAndTimes.geoms[0] : {
-                     type: 'GeometryCollection',
-                     geometries: geomsAndTimes.geoms
-                   },
-                   properties: properties
-                 };
-                 if (attr(root, 'id')) feature.id = attr(root, 'id');
-                 return [feature];
-               }
+         function continueHouse() {
+           if (context.mode().id !== 'draw-area') {
+             return continueTo(addHouse);
+           }
 
-               return gj;
-             },
-             gpx: function gpx(doc) {
-               var i,
-                   tracks = get(doc, 'trk'),
-                   routes = get(doc, 'rte'),
-                   waypoints = get(doc, 'wpt'),
-                   // a feature collection
-               gj = fc(),
-                   feature;
-
-               for (i = 0; i < tracks.length; i++) {
-                 feature = getTrack(tracks[i]);
-                 if (feature) gj.features.push(feature);
-               }
+           _houseID = null;
+           var continueString = helpHtml('intro.buildings.continue_building') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_building');
+           revealHouse(house, continueString);
+           context.map().on('move.intro drawn.intro', function () {
+             revealHouse(house, continueString, {
+               duration: 0
+             });
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               return;
+             } else if (mode.id === 'select') {
+               var graph = context.graph();
+               var way = context.entity(context.selectedIDs()[0]);
+               var nodes = graph.childNodes(way);
+               var points = utilArrayUniq(nodes).map(function (n) {
+                 return context.projection(n.loc);
+               });
 
-               for (i = 0; i < routes.length; i++) {
-                 feature = getRoute(routes[i]);
-                 if (feature) gj.features.push(feature);
+               if (isMostlySquare(points)) {
+                 _houseID = way.id;
+                 return continueTo(chooseCategoryBuilding);
+               } else {
+                 return continueTo(retryHouse);
                }
+             } else {
+               return chapter.restart();
+             }
+           });
 
-               for (i = 0; i < waypoints.length; i++) {
-                 gj.features.push(getPoint(waypoints[i]));
-               }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-               function getPoints(node, pointname) {
-                 var pts = get(node, pointname),
-                     line = [],
-                     times = [],
-                     heartRates = [],
-                     l = pts.length;
-                 if (l < 2) return {}; // Invalid line in GeoJSON
+         function retryHouse() {
+           var onClick = function onClick() {
+             continueTo(addHouse);
+           };
 
-                 for (var i = 0; i < l; i++) {
-                   var c = coordPair(pts[i]);
-                   line.push(c.coordinates);
-                   if (c.time) times.push(c.time);
-                   if (c.heartRate) heartRates.push(c.heartRate);
-                 }
+           revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: onClick
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             revealHouse(house, helpHtml('intro.buildings.retry_building'), {
+               duration: 0,
+               buttonText: _t.html('intro.ok'),
+               buttonCallback: onClick
+             });
+           });
 
-                 return {
-                   line: line,
-                   times: times,
-                   heartRates: heartRates
-                 };
-               }
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             nextStep();
+           }
+         }
 
-               function getTrack(node) {
-                 var segments = get(node, 'trkseg'),
-                     track = [],
-                     times = [],
-                     heartRates = [],
-                     line;
+         function chooseCategoryBuilding() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
+           }
 
-                 for (var i = 0; i < segments.length; i++) {
-                   line = getPoints(segments[i], 'trkpt');
+           var ids = context.selectedIDs();
 
-                   if (line) {
-                     if (line.line) track.push(line.line);
-                     if (line.times && line.times.length) times.push(line.times);
-                     if (line.heartRates && line.heartRates.length) heartRates.push(line.heartRates);
-                   }
-                 }
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           } // disallow scrolling
 
-                 if (track.length === 0) return;
-                 var properties = getProperties(node);
-                 extend(properties, getLineStyle(get1(node, 'extensions')));
-                 if (times.length) properties.coordTimes = track.length === 1 ? times[0] : times;
-                 if (heartRates.length) properties.heartRates = track.length === 1 ? heartRates[0] : heartRates;
-                 return {
-                   type: 'Feature',
-                   properties: properties,
-                   geometry: {
-                     type: track.length === 1 ? 'LineString' : 'MultiLineString',
-                     coordinates: track.length === 1 ? track[0] : track
-                   }
-                 };
-               }
 
-               function getRoute(node) {
-                 var line = getPoints(node, 'rtept');
-                 if (!line.line) return;
-                 var prop = getProperties(node);
-                 extend(prop, getLineStyle(get1(node, 'extensions')));
-                 var routeObj = {
-                   type: 'Feature',
-                   properties: prop,
-                   geometry: {
-                     type: 'LineString',
-                     coordinates: line.line
-                   }
-                 };
-                 return routeObj;
-               }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             var button = context.container().select('.preset-category-building .preset-list-button');
+             reveal(button.node(), helpHtml('intro.buildings.choose_category_building', {
+               category: buildingCatetory.name()
+             }));
+             button.on('click.intro', function () {
+               button.on('click.intro', null);
+               continueTo(choosePresetHouse);
+             });
+           }, 400); // after preset list pane visible..
 
-               function getPoint(node) {
-                 var prop = getProperties(node);
-                 extend(prop, getMulti(node, ['sym']));
-                 return {
-                   type: 'Feature',
-                   properties: prop,
-                   geometry: {
-                     type: 'Point',
-                     coordinates: coordPair(node).coordinates
-                   }
-                 };
-               }
+           context.on('enter.intro', function (mode) {
+             if (!_houseID || !context.hasEntity(_houseID)) {
+               return continueTo(addHouse);
+             }
 
-               function getLineStyle(extensions) {
-                 var style = {};
+             var ids = context.selectedIDs();
 
-                 if (extensions) {
-                   var lineStyle = get1(extensions, 'line');
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+               return continueTo(chooseCategoryBuilding);
+             }
+           });
 
-                   if (lineStyle) {
-                     var color = nodeVal(get1(lineStyle, 'color')),
-                         opacity = parseFloat(nodeVal(get1(lineStyle, 'opacity'))),
-                         width = parseFloat(nodeVal(get1(lineStyle, 'width')));
-                     if (color) style.stroke = color;
-                     if (!isNaN(opacity)) style['stroke-opacity'] = opacity; // GPX width is in mm, convert to px with 96 px per inch
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-                     if (!isNaN(width)) style['stroke-width'] = width * 96 / 25.4;
-                   }
-                 }
+         function choosePresetHouse() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
+           }
 
-                 return style;
-               }
+           var ids = context.selectedIDs();
 
-               function getProperties(node) {
-                 var prop = getMulti(node, ['name', 'cmt', 'desc', 'type', 'time', 'keywords']),
-                     links = get(node, 'link');
-                 if (links.length) prop.links = [];
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           } // disallow scrolling
 
-                 for (var i = 0, link; i < links.length; i++) {
-                   link = {
-                     href: attr(links[i], 'href')
-                   };
-                   extend(link, getMulti(links[i], ['text', 'type']));
-                   prop.links.push(link);
-                 }
 
-                 return prop;
-               }
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             var button = context.container().select('.preset-building-house .preset-list-button');
+             reveal(button.node(), helpHtml('intro.buildings.choose_preset_house', {
+               preset: housePreset.name()
+             }), {
+               duration: 300
+             });
+             button.on('click.intro', function () {
+               button.on('click.intro', null);
+               continueTo(closeEditorHouse);
+             });
+           }, 400); // after preset list pane visible..
 
-               return gj;
+           context.on('enter.intro', function (mode) {
+             if (!_houseID || !context.hasEntity(_houseID)) {
+               return continueTo(addHouse);
              }
-           };
-           return t;
-         }();
-
-         module.exports = toGeoJSON;
-       });
-
-       var _initialized = false;
-       var _enabled = false;
-
-       var _geojson;
-
-       function svgData(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
 
-         var _showLabels = true;
-         var detected = utilDetect();
-         var layer = select(null);
+             var ids = context.selectedIDs();
 
-         var _vtService;
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
+               return continueTo(chooseCategoryBuilding);
+             }
+           });
 
-         var _fileList;
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.container().select('.preset-list-button').on('click.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-         var _template;
+         function closeEditorHouse() {
+           if (!_houseID || !context.hasEntity(_houseID)) {
+             return addHouse();
+           }
 
-         var _src;
+           var ids = context.selectedIDs();
 
-         function init() {
-           if (_initialized) return; // run once
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
+             context.enter(modeSelect(context, [_houseID]));
+           }
 
-           _geojson = {};
-           _enabled = true;
+           context.history().checkpoint('hasHouse');
+           context.on('exit.intro', function () {
+             continueTo(rightClickHouse);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+               button: {
+                 html: icon('#iD-icon-close', 'inline')
+               }
+             }));
+           }, 500);
 
-           function over(d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             d3_event.dataTransfer.dropEffect = 'copy';
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
-
-           context.container().attr('dropzone', 'copy').on('drop.svgData', function (d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             if (!detected.filedrop) return;
-             drawData.fileList(d3_event.dataTransfer.files);
-           }).on('dragenter.svgData', over).on('dragexit.svgData', over).on('dragover.svgData', over);
-           _initialized = true;
          }
 
-         function getService() {
-           if (services.vectorTile && !_vtService) {
-             _vtService = services.vectorTile;
+         function rightClickHouse() {
+           if (!_houseID) return chapter.restart();
+           context.enter(modeBrowse(context));
+           context.history().reset('hasHouse');
+           var zoom = context.map().zoom();
 
-             _vtService.event.on('loadedData', throttledRedraw);
-           } else if (!services.vectorTile && _vtService) {
-             _vtService = null;
+           if (zoom < 20) {
+             zoom = 20;
            }
 
-           return _vtService;
-         }
-
-         function showLayer() {
-           layerOn();
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
-             dispatch.call('change');
+           context.map().centerZoomEase(house, zoom, 500);
+           context.on('enter.intro', function (mode) {
+             if (mode.id !== 'select') return;
+             var ids = context.selectedIDs();
+             if (ids.length !== 1 || ids[0] !== _houseID) return;
+             timeout(function () {
+               var node = selectMenuItem(context, 'orthogonalize').node();
+               if (!node) return;
+               continueTo(clickSquare);
+             }, 50); // after menu visible
+           });
+           context.map().on('move.intro drawn.intro', function () {
+             var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
+             revealHouse(house, rightclickString, {
+               duration: 0
+             });
+           });
+           context.history().on('change.intro', function () {
+             continueTo(rightClickHouse);
            });
-         }
-
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', layerOff);
-         }
 
-         function layerOn() {
-           layer.style('display', 'block');
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
          }
 
-         function layerOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         } // ensure that all geojson features in a collection have IDs
-
-
-         function ensureIDs(gj) {
-           if (!gj) return null;
+         function clickSquare() {
+           if (!_houseID) return chapter.restart();
+           var entity = context.hasEntity(_houseID);
+           if (!entity) return continueTo(rightClickHouse);
+           var node = selectMenuItem(context, 'orthogonalize').node();
 
-           if (gj.type === 'FeatureCollection') {
-             for (var i = 0; i < gj.features.length; i++) {
-               ensureFeatureID(gj.features[i]);
-             }
-           } else {
-             ensureFeatureID(gj);
+           if (!node) {
+             return continueTo(rightClickHouse);
            }
 
-           return gj;
-         } // ensure that each single Feature object has a unique ID
-
+           var wasChanged = false;
+           reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+             padding: 50
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'browse') {
+               continueTo(rightClickHouse);
+             } else if (mode.id === 'move' || mode.id === 'rotate') {
+               continueTo(retryClickSquare);
+             }
+           });
+           context.map().on('move.intro', function () {
+             var node = selectMenuItem(context, 'orthogonalize').node();
 
-         function ensureFeatureID(feature) {
-           if (!feature) return;
-           feature.__featurehash__ = utilHashcode(fastJsonStableStringify(feature));
-           return feature;
-         } // Prefer an array of Features instead of a FeatureCollection
+             if (!wasChanged && !node) {
+               return continueTo(rightClickHouse);
+             }
 
+             reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
+               duration: 0,
+               padding: 50
+             });
+           });
+           context.history().on('change.intro', function () {
+             wasChanged = true;
+             context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
 
-         function getFeatures(gj) {
-           if (!gj) return [];
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
+                 n: 1
+               })) {
+                 continueTo(doneSquare);
+               } else {
+                 continueTo(retryClickSquare);
+               }
+             }, 500); // after transitioned actions
+           });
 
-           if (gj.type === 'FeatureCollection') {
-             return gj.features;
-           } else {
-             return [gj];
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
            }
          }
 
-         function featureKey(d) {
-           return d.__featurehash__;
-         }
+         function retryClickSquare() {
+           context.enter(modeBrowse(context));
+           revealHouse(house, helpHtml('intro.buildings.retry_square'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(rightClickHouse);
+             }
+           });
 
-         function isPolygon(d) {
-           return d.geometry.type === 'Polygon' || d.geometry.type === 'MultiPolygon';
+           function continueTo(nextStep) {
+             nextStep();
+           }
          }
 
-         function clipPathID(d) {
-           return 'ideditor-data-' + d.__featurehash__ + '-clippath';
-         }
+         function doneSquare() {
+           context.history().checkpoint('doneSquare');
+           revealHouse(house, helpHtml('intro.buildings.done_square'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(addTank);
+             }
+           });
 
-         function featureClasses(d) {
-           return ['data' + d.__featurehash__, d.geometry.type, isPolygon(d) ? 'area' : '', d.__layerID__ || ''].filter(Boolean).join(' ');
+           function continueTo(nextStep) {
+             nextStep();
+           }
          }
 
-         function drawData(selection) {
-           var vtService = getService();
-           var getPath = svgPath(projection).geojson;
-           var getAreaPath = svgPath(projection, null, true).geojson;
-           var hasData = drawData.hasData();
-           layer = selection.selectAll('.layer-mapdata').data(_enabled && hasData ? [0] : []);
-           layer.exit().remove();
-           layer = layer.enter().append('g').attr('class', 'layer-mapdata').merge(layer);
-           var surface = context.surface();
-           if (!surface || surface.empty()) return; // not ready to draw yet, starting up
-           // Gather data
-
-           var geoData, polygonData;
+         function addTank() {
+           context.enter(modeBrowse(context));
+           context.history().reset('doneSquare');
+           _tankID = null;
+           var msec = transitionTime(tank, context.map().center());
 
-           if (_template && vtService) {
-             // fetch data from vector tile service
-             var sourceID = _template;
-             vtService.loadTiles(sourceID, _template, projection);
-             geoData = vtService.data(sourceID, projection);
-           } else {
-             geoData = getFeatures(_geojson);
+           if (msec) {
+             reveal(null, null, {
+               duration: 0
+             });
            }
 
-           geoData = geoData.filter(getPath);
-           polygonData = geoData.filter(isPolygon); // Draw clip paths for polygons
-
-           var clipPaths = surface.selectAll('defs').selectAll('.clipPath-data').data(polygonData, featureKey);
-           clipPaths.exit().remove();
-           var clipPathsEnter = clipPaths.enter().append('clipPath').attr('class', 'clipPath-data').attr('id', clipPathID);
-           clipPathsEnter.append('path');
-           clipPaths.merge(clipPathsEnter).selectAll('path').attr('d', getAreaPath); // Draw fill, shadow, stroke layers
-
-           var datagroups = layer.selectAll('g.datagroup').data(['fill', 'shadow', 'stroke']);
-           datagroups = datagroups.enter().append('g').attr('class', function (d) {
-             return 'datagroup datagroup-' + d;
-           }).merge(datagroups); // Draw paths
-
-           var pathData = {
-             fill: polygonData,
-             shadow: geoData,
-             stroke: geoData
-           };
-           var paths = datagroups.selectAll('path').data(function (layer) {
-             return pathData[layer];
-           }, featureKey); // exit
-
-           paths.exit().remove(); // enter/update
+           context.map().centerZoomEase(tank, 19.5, msec);
+           timeout(function () {
+             reveal('button.add-area', helpHtml('intro.buildings.add_tank'));
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'add-area') return;
+               continueTo(startTank);
+             });
+           }, msec + 100);
 
-           paths = paths.enter().append('path').attr('class', function (d) {
-             var datagroup = this.parentNode.__data__;
-             return 'pathdata ' + datagroup + ' ' + featureClasses(d);
-           }).attr('clip-path', function (d) {
-             var datagroup = this.parentNode.__data__;
-             return datagroup === 'fill' ? 'url(#' + clipPathID(d) + ')' : null;
-           }).merge(paths).attr('d', function (d) {
-             var datagroup = this.parentNode.__data__;
-             return datagroup === 'fill' ? getAreaPath(d) : getPath(d);
-           }); // Draw labels
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-           layer.call(drawLabels, 'label-halo', geoData).call(drawLabels, 'label', geoData);
+         function startTank() {
+           if (context.mode().id !== 'add-area') {
+             return continueTo(addTank);
+           }
 
-           function drawLabels(selection, textClass, data) {
-             var labelPath = d3_geoPath(projection);
-             var labelData = data.filter(function (d) {
-               return _showLabels && d.properties && (d.properties.desc || d.properties.name);
+           _tankID = null;
+           timeout(function () {
+             var startString = helpHtml('intro.buildings.start_tank') + helpHtml('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
+             revealTank(tank, startString);
+             context.map().on('move.intro drawn.intro', function () {
+               revealTank(tank, startString, {
+                 duration: 0
+               });
              });
-             var labels = selection.selectAll('text.' + textClass).data(labelData, featureKey); // exit
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'draw-area') return chapter.restart();
+               continueTo(continueTank);
+             });
+           }, 550); // after easing
 
-             labels.exit().remove(); // enter/update
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
+           }
+         }
 
-             labels = labels.enter().append('text').attr('class', function (d) {
-               return textClass + ' ' + featureClasses(d);
-             }).merge(labels).text(function (d) {
-               return d.properties.desc || d.properties.name;
-             }).attr('x', function (d) {
-               var centroid = labelPath.centroid(d);
-               return centroid[0] + 11;
-             }).attr('y', function (d) {
-               var centroid = labelPath.centroid(d);
-               return centroid[1];
+         function continueTank() {
+           if (context.mode().id !== 'draw-area') {
+             return continueTo(addTank);
+           }
+
+           _tankID = null;
+           var continueString = helpHtml('intro.buildings.continue_tank') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_tank');
+           revealTank(tank, continueString);
+           context.map().on('move.intro drawn.intro', function () {
+             revealTank(tank, continueString, {
+               duration: 0
              });
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'draw-area') {
+               return;
+             } else if (mode.id === 'select') {
+               _tankID = context.selectedIDs()[0];
+               return continueTo(searchPresetTank);
+             } else {
+               return continueTo(addTank);
+             }
+           });
+
+           function continueTo(nextStep) {
+             context.map().on('move.intro drawn.intro', null);
+             context.on('enter.intro', null);
+             nextStep();
            }
          }
 
-         function getExtension(fileName) {
-           if (!fileName) return;
-           var re = /\.(gpx|kml|(geo)?json)$/i;
-           var match = fileName.toLowerCase().match(re);
-           return match && match.length && match[0];
-         }
+         function searchPresetTank() {
+           if (!_tankID || !context.hasEntity(_tankID)) {
+             return addTank();
+           }
 
-         function xmlToDom(textdata) {
-           return new DOMParser().parseFromString(textdata, 'text/xml');
-         }
+           var ids = context.selectedIDs();
 
-         drawData.setFile = function (extension, data) {
-           _template = null;
-           _fileList = null;
-           _geojson = null;
-           _src = null;
-           var gj;
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+             context.enter(modeSelect(context, [_tankID]));
+           } // disallow scrolling
 
-           switch (extension) {
-             case '.gpx':
-               gj = togeojson.gpx(xmlToDom(data));
-               break;
 
-             case '.kml':
-               gj = togeojson.kml(xmlToDom(data));
-               break;
+           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+           timeout(function () {
+             // reset pane, in case user somehow happened to change it..
+             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
+             context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+             reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+               preset: tankPreset.name()
+             }));
+           }, 400); // after preset list pane visible..
 
-             case '.geojson':
-             case '.json':
-               gj = JSON.parse(data);
-               break;
-           }
+           context.on('enter.intro', function (mode) {
+             if (!_tankID || !context.hasEntity(_tankID)) {
+               return continueTo(addTank);
+             }
 
-           gj = gj || {};
+             var ids = context.selectedIDs();
 
-           if (Object.keys(gj).length) {
-             _geojson = ensureIDs(gj);
-             _src = extension + ' data file';
-             this.fitZoom();
-           }
+             if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
+               // keep the user's area selected..
+               context.enter(modeSelect(context, [_tankID])); // reset pane, in case user somehow happened to change it..
 
-           dispatch.call('change');
-           return this;
-         };
+               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
 
-         drawData.showLabels = function (val) {
-           if (!arguments.length) return _showLabels;
-           _showLabels = val;
-           return this;
-         };
+               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
+               reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
+                 preset: tankPreset.name()
+               }));
+               context.history().on('change.intro', null);
+             }
+           });
 
-         drawData.enabled = function (val) {
-           if (!arguments.length) return _enabled;
-           _enabled = val;
+           function checkPresetSearch() {
+             var first = context.container().select('.preset-list-item:first-child');
 
-           if (_enabled) {
-             showLayer();
-           } else {
-             hideLayer();
+             if (first.classed('preset-man_made-storage_tank')) {
+               reveal(first.select('.preset-list-button').node(), helpHtml('intro.buildings.choose_tank', {
+                 preset: tankPreset.name()
+               }), {
+                 duration: 300
+               });
+               context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+               context.history().on('change.intro', function () {
+                 continueTo(closeEditorTank);
+               });
+             }
            }
 
-           dispatch.call('change');
-           return this;
-         };
-
-         drawData.hasData = function () {
-           var gj = _geojson || {};
-           return !!(_template || Object.keys(gj).length);
-         };
-
-         drawData.template = function (val, src) {
-           if (!arguments.length) return _template; // test source against OSM imagery blocklists..
+           function continueTo(nextStep) {
+             context.container().select('.inspector-wrap').on('wheel.intro', null);
+             context.on('enter.intro', null);
+             context.history().on('change.intro', null);
+             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+             nextStep();
+           }
+         }
 
-           var osm = context.connection();
+         function closeEditorTank() {
+           if (!_tankID || !context.hasEntity(_tankID)) {
+             return addTank();
+           }
 
-           if (osm) {
-             var blocklists = osm.imageryBlocklists();
-             var fail = false;
-             var tested = 0;
-             var regex;
+           var ids = context.selectedIDs();
 
-             for (var i = 0; i < blocklists.length; i++) {
-               regex = blocklists[i];
-               fail = regex.test(val);
-               tested++;
-               if (fail) break;
-             } // ensure at least one test was run.
+           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
+             context.enter(modeSelect(context, [_tankID]));
+           }
 
+           context.history().checkpoint('hasTank');
+           context.on('exit.intro', function () {
+             continueTo(rightClickTank);
+           });
+           timeout(function () {
+             reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
+               button: {
+                 html: icon('#iD-icon-close', 'inline')
+               }
+             }));
+           }, 500);
 
-             if (!tested) {
-               regex = /.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/;
-               fail = regex.test(val);
-             }
+           function continueTo(nextStep) {
+             context.on('exit.intro', null);
+             nextStep();
            }
+         }
 
-           _template = val;
-           _fileList = null;
-           _geojson = null; // strip off the querystring/hash from the template,
-           // it often includes the access token
+         function rightClickTank() {
+           if (!_tankID) return continueTo(addTank);
+           context.enter(modeBrowse(context));
+           context.history().reset('hasTank');
+           context.map().centerEase(tank, 500);
+           timeout(function () {
+             context.on('enter.intro', function (mode) {
+               if (mode.id !== 'select') return;
+               var ids = context.selectedIDs();
+               if (ids.length !== 1 || ids[0] !== _tankID) return;
+               timeout(function () {
+                 var node = selectMenuItem(context, 'circularize').node();
+                 if (!node) return;
+                 continueTo(clickCircle);
+               }, 50); // after menu visible
+             });
+             var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
+             revealTank(tank, rightclickString);
+             context.map().on('move.intro drawn.intro', function () {
+               revealTank(tank, rightclickString, {
+                 duration: 0
+               });
+             });
+             context.history().on('change.intro', function () {
+               continueTo(rightClickTank);
+             });
+           }, 600);
 
-           _src = src || 'vectortile:' + val.split(/[?#]/)[0];
-           dispatch.call('change');
-           return this;
-         };
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro drawn.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-         drawData.geojson = function (gj, src) {
-           if (!arguments.length) return _geojson;
-           _template = null;
-           _fileList = null;
-           _geojson = null;
-           _src = null;
-           gj = gj || {};
+         function clickCircle() {
+           if (!_tankID) return chapter.restart();
+           var entity = context.hasEntity(_tankID);
+           if (!entity) return continueTo(rightClickTank);
+           var node = selectMenuItem(context, 'circularize').node();
 
-           if (Object.keys(gj).length) {
-             _geojson = ensureIDs(gj);
-             _src = src || 'unknown.geojson';
+           if (!node) {
+             return continueTo(rightClickTank);
            }
 
-           dispatch.call('change');
-           return this;
-         };
+           var wasChanged = false;
+           reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+             padding: 50
+           });
+           context.on('enter.intro', function (mode) {
+             if (mode.id === 'browse') {
+               continueTo(rightClickTank);
+             } else if (mode.id === 'move' || mode.id === 'rotate') {
+               continueTo(retryClickCircle);
+             }
+           });
+           context.map().on('move.intro', function () {
+             var node = selectMenuItem(context, 'circularize').node();
 
-         drawData.fileList = function (fileList) {
-           if (!arguments.length) return _fileList;
-           _template = null;
-           _fileList = fileList;
-           _geojson = null;
-           _src = null;
-           if (!fileList || !fileList.length) return this;
-           var f = fileList[0];
-           var extension = getExtension(f.name);
-           var reader = new FileReader();
+             if (!wasChanged && !node) {
+               return continueTo(rightClickTank);
+             }
 
-           reader.onload = function () {
-             return function (e) {
-               drawData.setFile(extension, e.target.result);
-             };
-           }();
+             reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
+               duration: 0,
+               padding: 50
+             });
+           });
+           context.history().on('change.intro', function () {
+             wasChanged = true;
+             context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
 
-           reader.readAsText(f);
-           return this;
-         };
+             timeout(function () {
+               if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
+                 n: 1
+               })) {
+                 continueTo(play);
+               } else {
+                 continueTo(retryClickCircle);
+               }
+             }, 500); // after transitioned actions
+           });
 
-         drawData.url = function (url, defaultExtension) {
-           _template = null;
-           _fileList = null;
-           _geojson = null;
-           _src = null; // strip off any querystring/hash from the url before checking extension
+           function continueTo(nextStep) {
+             context.on('enter.intro', null);
+             context.map().on('move.intro', null);
+             context.history().on('change.intro', null);
+             nextStep();
+           }
+         }
 
-           var testUrl = url.split(/[?#]/)[0];
-           var extension = getExtension(testUrl) || defaultExtension;
+         function retryClickCircle() {
+           context.enter(modeBrowse(context));
+           revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               continueTo(rightClickTank);
+             }
+           });
 
-           if (extension) {
-             _template = null;
-             d3_text(url).then(function (data) {
-               drawData.setFile(extension, data);
-             })["catch"](function () {
-               /* ignore */
-             });
-           } else {
-             drawData.template(url);
+           function continueTo(nextStep) {
+             nextStep();
            }
+         }
 
-           return this;
-         };
+         function play() {
+           dispatch.call('done');
+           reveal('.ideditor', helpHtml('intro.buildings.play', {
+             next: _t('intro.startediting.title')
+           }), {
+             tooltipBox: '.intro-nav-wrap .chapter-startEditing',
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               reveal('.ideditor');
+             }
+           });
+         }
 
-         drawData.getSrc = function () {
-           return _src || '';
+         chapter.enter = function () {
+           addHouse();
          };
 
-         drawData.fitZoom = function () {
-           var features = getFeatures(_geojson);
-           if (!features.length) return;
-           var map = context.map();
-           var viewport = map.trimmedExtent().polygon();
-           var coords = features.reduce(function (coords, feature) {
-             var geom = feature.geometry;
-             if (!geom) return coords;
-             var c = geom.coordinates;
-             /* eslint-disable no-fallthrough */
+         chapter.exit = function () {
+           timeouts.forEach(window.clearTimeout);
+           context.on('enter.intro exit.intro', null);
+           context.map().on('move.intro drawn.intro', null);
+           context.history().on('change.intro', null);
+           context.container().select('.inspector-wrap').on('wheel.intro', null);
+           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
+           context.container().select('.more-fields .combobox-input').on('click.intro', null);
+         };
 
-             switch (geom.type) {
-               case 'Point':
-                 c = [c];
+         chapter.restart = function () {
+           chapter.exit();
+           chapter.enter();
+         };
 
-               case 'MultiPoint':
-               case 'LineString':
-                 break;
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-               case 'MultiPolygon':
-                 c = utilArrayFlatten(c);
+       function uiIntroStartEditing(context, reveal) {
+         var dispatch = dispatch$8('done', 'startEditing');
+         var modalSelection = select(null);
+         var chapter = {
+           title: 'intro.startediting.title'
+         };
 
-               case 'Polygon':
-               case 'MultiLineString':
-                 c = utilArrayFlatten(c);
-                 break;
+         function showHelp() {
+           reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               shortcuts();
              }
-             /* eslint-enable no-fallthrough */
-
-
-             return utilArrayUnion(coords, c);
-           }, []);
+           });
+         }
 
-           if (!geoPolygonIntersectsPolygon(viewport, coords, true)) {
-             var extent = geoExtent(d3_geoBounds({
-               type: 'LineString',
-               coordinates: coords
-             }));
-             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-           }
+         function shortcuts() {
+           reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               showSave();
+             }
+           });
+         }
 
-           return this;
-         };
+         function showSave() {
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-         init();
-         return drawData;
-       }
+           reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
+             buttonText: _t.html('intro.ok'),
+             buttonCallback: function buttonCallback() {
+               showStart();
+             }
+           });
+         }
 
-       function svgDebug(projection, context) {
-         function drawDebug(selection) {
-           var showTile = context.getDebug('tile');
-           var showCollision = context.getDebug('collision');
-           var showImagery = context.getDebug('imagery');
-           var showTouchTargets = context.getDebug('target');
-           var showDownloaded = context.getDebug('downloaded');
-           var debugData = [];
+         function showStart() {
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-           if (showTile) {
-             debugData.push({
-               "class": 'red',
-               label: 'tile'
-             });
-           }
+           modalSelection = uiModal(context.container());
+           modalSelection.select('.modal').attr('class', 'modal-splash modal');
+           modalSelection.selectAll('.close').remove();
+           var startbutton = modalSelection.select('.content').attr('class', 'fillL').append('button').attr('class', 'modal-section huge-modal-button').on('click', function () {
+             modalSelection.remove();
+           });
+           startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           startbutton.append('h2').call(_t.append('intro.startediting.start'));
+           dispatch.call('startEditing');
+         }
 
-           if (showCollision) {
-             debugData.push({
-               "class": 'yellow',
-               label: 'collision'
-             });
-           }
+         chapter.enter = function () {
+           showHelp();
+         };
 
-           if (showImagery) {
-             debugData.push({
-               "class": 'orange',
-               label: 'imagery'
-             });
-           }
+         chapter.exit = function () {
+           modalSelection.remove();
+           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+         };
 
-           if (showTouchTargets) {
-             debugData.push({
-               "class": 'pink',
-               label: 'touchTargets'
-             });
-           }
+         return utilRebind(chapter, dispatch, 'on');
+       }
 
-           if (showDownloaded) {
-             debugData.push({
-               "class": 'purple',
-               label: 'downloaded'
-             });
-           }
+       var chapterUi = {
+         welcome: uiIntroWelcome,
+         navigation: uiIntroNavigation,
+         point: uiIntroPoint,
+         area: uiIntroArea,
+         line: uiIntroLine,
+         building: uiIntroBuilding,
+         startEditing: uiIntroStartEditing
+       };
+       var chapterFlow = ['welcome', 'navigation', 'point', 'area', 'line', 'building', 'startEditing'];
+       function uiIntro(context) {
+         var INTRO_IMAGERY = 'EsriWorldImageryClarity';
+         var _introGraph = {};
 
-           var legend = context.container().select('.main-content').selectAll('.debug-legend').data(debugData.length ? [0] : []);
-           legend.exit().remove();
-           legend = legend.enter().append('div').attr('class', 'fillD debug-legend').merge(legend);
-           var legendItems = legend.selectAll('.debug-legend-item').data(debugData, function (d) {
-             return d.label;
-           });
-           legendItems.exit().remove();
-           legendItems.enter().append('span').attr('class', function (d) {
-             return "debug-legend-item ".concat(d["class"]);
-           }).text(function (d) {
-             return d.label;
-           });
-           var layer = selection.selectAll('.layer-debug').data(showImagery || showDownloaded ? [0] : []);
-           layer.exit().remove();
-           layer = layer.enter().append('g').attr('class', 'layer-debug').merge(layer); // imagery
+         var _currChapter;
 
-           var extent = context.map().extent();
-           _mainFileFetcher.get('imagery').then(function (d) {
-             var hits = showImagery && d.query.bbox(extent.rectangle(), true) || [];
-             var features = hits.map(function (d) {
-               return d.features[d.id];
-             });
-             var imagery = layer.selectAll('path.debug-imagery').data(features);
-             imagery.exit().remove();
-             imagery.enter().append('path').attr('class', 'debug-imagery debug orange');
+         function intro(selection) {
+           _mainFileFetcher.get('intro_graph').then(function (dataIntroGraph) {
+             // create entities for intro graph and localize names
+             for (var id in dataIntroGraph) {
+               if (!_introGraph[id]) {
+                 _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
+               }
+             }
+
+             selection.call(startIntro);
            })["catch"](function () {
              /* ignore */
-           }); // downloaded
+           });
+         }
+
+         function startIntro(selection) {
+           context.enter(modeBrowse(context)); // Save current map state
 
            var osm = context.connection();
-           var dataDownloaded = [];
+           var history = context.history().toJSON();
+           var hash = window.location.hash;
+           var center = context.map().center();
+           var zoom = context.map().zoom();
+           var background = context.background().baseLayerSource();
+           var overlays = context.background().overlayLayerSources();
+           var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
+           var caches = osm && osm.caches();
+           var baseEntities = context.history().graph().base().entities; // Show sidebar and disable the sidebar resizing button
+           // (this needs to be before `context.inIntro(true)`)
 
-           if (osm && showDownloaded) {
-             var rtree = osm.caches('get').tile.rtree;
-             dataDownloaded = rtree.all().map(function (bbox) {
-               return {
-                 type: 'Feature',
-                 properties: {
-                   id: bbox.id
-                 },
-                 geometry: {
-                   type: 'Polygon',
-                   coordinates: [[[bbox.minX, bbox.minY], [bbox.minX, bbox.maxY], [bbox.maxX, bbox.maxY], [bbox.maxX, bbox.minY], [bbox.minX, bbox.minY]]]
-                 }
-               };
-             });
-           }
+           context.ui().sidebar.expand();
+           context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
 
-           var downloaded = layer.selectAll('path.debug-downloaded').data(showDownloaded ? dataDownloaded : []);
-           downloaded.exit().remove();
-           downloaded.enter().append('path').attr('class', 'debug-downloaded debug purple'); // update
+           context.inIntro(true); // Load semi-real data used in intro
 
-           layer.selectAll('path').attr('d', svgPath(projection).geojson);
-         } // This looks strange because `enabled` methods on other layers are
-         // chainable getter/setters, and this one is just a getter.
+           if (osm) {
+             osm.toggle(false).reset();
+           }
 
+           context.history().reset();
+           context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
+           context.history().checkpoint('initial'); // Setup imagery
 
-         drawDebug.enabled = function () {
-           if (!arguments.length) {
-             return context.getDebug('tile') || context.getDebug('collision') || context.getDebug('imagery') || context.getDebug('target') || context.getDebug('downloaded');
+           var imagery = context.background().findSource(INTRO_IMAGERY);
+
+           if (imagery) {
+             context.background().baseLayerSource(imagery);
            } else {
-             return this;
+             context.background().bing();
            }
-         };
 
-         return drawDebug;
-       }
-
-       /*
-           A standalone SVG element that contains only a `defs` sub-element. To be
-           used once globally, since defs IDs must be unique within a document.
-       */
-
-       function svgDefs(context) {
-         var _defsSelection = select(null);
+           overlays.forEach(function (d) {
+             return context.background().toggleOverlayLayer(d);
+           }); // Setup data layers (only OSM)
 
-         var _spritesheetIds = ['iD-sprite', 'maki-sprite', 'temaki-sprite', 'fa-sprite', 'community-sprite'];
+           var layers = context.layers();
+           layers.all().forEach(function (item) {
+             // if the layer has the function `enabled`
+             if (typeof item.layer.enabled === 'function') {
+               item.layer.enabled(item.id === 'osm');
+             }
+           });
+           context.container().selectAll('.main-map .layer-background').style('opacity', 1);
+           var curtain = uiCurtain(context.container().node());
+           selection.call(curtain); // Store that the user started the walkthrough..
 
-         function drawDefs(selection) {
-           _defsSelection = selection.append('defs'); // add markers
+           corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
 
-           _defsSelection.append('marker').attr('id', 'ideditor-oneway-marker').attr('viewBox', '0 0 10 5').attr('refX', 2.5).attr('refY', 2.5).attr('markerWidth', 2).attr('markerHeight', 2).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'oneway-marker-path').attr('d', 'M 5,3 L 0,3 L 0,2 L 5,2 L 5,0 L 10,2.5 L 5,5 z').attr('stroke', 'none').attr('fill', '#000').attr('opacity', '0.75'); // SVG markers have to be given a colour where they're defined
-           // (they can't inherit it from the line they're attached to),
-           // so we need to manually define markers for each color of tag
-           // (also, it's slightly nicer if we can control the
-           // positioning for different tags)
+           var storedProgress = corePreferences('walkthrough_progress') || '';
+           var progress = storedProgress.split(';').filter(Boolean);
+           var chapters = chapterFlow.map(function (chapter, i) {
+             var s = chapterUi[chapter](context, curtain.reveal).on('done', function () {
+               buttons.filter(function (d) {
+                 return d.title === s.title;
+               }).classed('finished', true);
 
+               if (i < chapterFlow.length - 1) {
+                 var next = chapterFlow[i + 1];
+                 context.container().select("button.chapter-".concat(next)).classed('next', true);
+               } // Store walkthrough progress..
 
-           function addSidedMarker(name, color, offset) {
-             _defsSelection.append('marker').attr('id', 'ideditor-sided-marker-' + name).attr('viewBox', '0 0 2 2').attr('refX', 1).attr('refY', -offset).attr('markerWidth', 1.5).attr('markerHeight', 1.5).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'sided-marker-path sided-marker-' + name + '-path').attr('d', 'M 0,0 L 1,1 L 2,0 z').attr('stroke', 'none').attr('fill', color);
-           }
 
-           addSidedMarker('natural', 'rgb(170, 170, 170)', 0); // for a coastline, the arrows are (somewhat unintuitively) on
-           // the water side, so let's color them blue (with a gap) to
-           // give a stronger indication
+               progress.push(chapter);
+               corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+             });
+             return s;
+           });
+           chapters[chapters.length - 1].on('startEditing', function () {
+             // Store walkthrough progress..
+             progress.push('startEditing');
+             corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';')); // Store if walkthrough is completed..
 
-           addSidedMarker('coastline', '#77dede', 1);
-           addSidedMarker('waterway', '#77dede', 1); // barriers have a dashed line, and separating the triangle
-           // from the line visually suits that
+             var incomplete = utilArrayDifference(chapterFlow, progress);
 
-           addSidedMarker('barrier', '#ddd', 1);
-           addSidedMarker('man_made', '#fff', 0);
+             if (!incomplete.length) {
+               corePreferences('walkthrough_completed', 'yes');
+             }
 
-           _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', '#333').attr('fill-opacity', '0.75').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75');
+             curtain.remove();
+             navwrap.remove();
+             context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
+             context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
 
-           _defsSelection.append('marker').attr('id', 'ideditor-viewfield-marker-wireframe').attr('viewBox', '0 0 16 16').attr('refX', 8).attr('refY', 16).attr('markerWidth', 4).attr('markerHeight', 4).attr('markerUnits', 'strokeWidth').attr('orient', 'auto').append('path').attr('class', 'viewfield-marker-path').attr('d', 'M 6,14 C 8,13.4 8,13.4 10,14 L 16,3 C 12,0 4,0 0,3 z').attr('fill', 'none').attr('stroke', '#fff').attr('stroke-width', '0.5px').attr('stroke-opacity', '0.75'); // add patterns
+             if (osm) {
+               osm.toggle(true).reset().caches(caches);
+             }
 
+             context.history().reset().merge(Object.values(baseEntities));
+             context.background().baseLayerSource(background);
+             overlays.forEach(function (d) {
+               return context.background().toggleOverlayLayer(d);
+             });
 
-           var patterns = _defsSelection.selectAll('pattern').data([// pattern name, pattern image name
-           ['beach', 'dots'], ['construction', 'construction'], ['cemetery', 'cemetery'], ['cemetery_christian', 'cemetery_christian'], ['cemetery_buddhist', 'cemetery_buddhist'], ['cemetery_muslim', 'cemetery_muslim'], ['cemetery_jewish', 'cemetery_jewish'], ['farmland', 'farmland'], ['farmyard', 'farmyard'], ['forest', 'forest'], ['forest_broadleaved', 'forest_broadleaved'], ['forest_needleleaved', 'forest_needleleaved'], ['forest_leafless', 'forest_leafless'], ['golf_green', 'grass'], ['grass', 'grass'], ['landfill', 'landfill'], ['meadow', 'grass'], ['orchard', 'orchard'], ['pond', 'pond'], ['quarry', 'quarry'], ['scrub', 'bushes'], ['vineyard', 'vineyard'], ['water_standing', 'lines'], ['waves', 'waves'], ['wetland', 'wetland'], ['wetland_marsh', 'wetland_marsh'], ['wetland_swamp', 'wetland_swamp'], ['wetland_bog', 'wetland_bog'], ['wetland_reedbed', 'wetland_reedbed']]).enter().append('pattern').attr('id', function (d) {
-             return 'ideditor-pattern-' + d[0];
-           }).attr('width', 32).attr('height', 32).attr('patternUnits', 'userSpaceOnUse');
+             if (history) {
+               context.history().fromJSON(history, false);
+             }
 
-           patterns.append('rect').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('class', function (d) {
-             return 'pattern-color-' + d[0];
+             context.map().centerZoom(center, zoom);
+             window.location.replace(hash);
+             context.inIntro(false);
            });
-           patterns.append('image').attr('x', 0).attr('y', 0).attr('width', 32).attr('height', 32).attr('xlink:href', function (d) {
-             return context.imagePath('pattern/' + d[1] + '.png');
-           }); // add clip paths
+           var navwrap = selection.append('div').attr('class', 'intro-nav-wrap fillD');
+           navwrap.append('svg').attr('class', 'intro-nav-wrap-logo').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           var buttonwrap = navwrap.append('div').attr('class', 'joined').selectAll('button.chapter');
+           var buttons = buttonwrap.data(chapters).enter().append('button').attr('class', function (d, i) {
+             return "chapter chapter-".concat(chapterFlow[i]);
+           }).on('click', enterChapter);
+           buttons.append('span').html(function (d) {
+             return _t.html(d.title);
+           });
+           buttons.append('span').attr('class', 'status').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
+           enterChapter(null, chapters[0]);
 
-           _defsSelection.selectAll('clipPath').data([12, 18, 20, 32, 45]).enter().append('clipPath').attr('id', function (d) {
-             return 'ideditor-clip-square-' + d;
-           }).append('rect').attr('x', 0).attr('y', 0).attr('width', function (d) {
-             return d;
-           }).attr('height', function (d) {
-             return d;
-           }); // add symbol spritesheets
+           function enterChapter(d3_event, newChapter) {
+             if (_currChapter) {
+               _currChapter.exit();
+             }
+
+             context.enter(modeBrowse(context));
+             _currChapter = newChapter;
 
+             _currChapter.enter();
 
-           addSprites(_spritesheetIds, true);
+             buttons.classed('next', false).classed('active', function (d) {
+               return d.title === _currChapter.title;
+             });
+           }
          }
 
-         function addSprites(ids, overrideColors) {
-           _spritesheetIds = utilArrayUniq(_spritesheetIds.concat(ids));
+         return intro;
+       }
 
-           var spritesheets = _defsSelection.selectAll('.spritesheet').data(_spritesheetIds);
+       function uiIssuesInfo(context) {
+         var warningsItem = {
+           id: 'warnings',
+           count: 0,
+           iconID: 'iD-icon-alert',
+           descriptionID: 'issues.warnings_and_errors'
+         };
+         var resolvedItem = {
+           id: 'resolved',
+           count: 0,
+           iconID: 'iD-icon-apply',
+           descriptionID: 'issues.user_resolved_issues'
+         };
 
-           spritesheets.enter().append('g').attr('class', function (d) {
-             return 'spritesheet spritesheet-' + d;
-           }).each(function (d) {
-             var url = context.imagePath(d + '.svg');
-             var node = select(this).node();
-             svg(url).then(function (svg) {
-               node.appendChild(select(svg.documentElement).attr('id', 'ideditor-' + d).node());
+         function update(selection) {
+           var shownItems = [];
+           var liveIssues = context.validator().getIssues({
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           });
 
-               if (overrideColors && d !== 'iD-sprite') {
-                 // allow icon colors to be overridden..
-                 select(node).selectAll('path').attr('fill', 'currentColor');
-               }
-             })["catch"](function () {
-               /* ignore */
+           if (liveIssues.length) {
+             warningsItem.count = liveIssues.length;
+             shownItems.push(warningsItem);
+           }
+
+           if (corePreferences('validate-what') === 'all') {
+             var resolvedIssues = context.validator().getResolvedIssues();
+
+             if (resolvedIssues.length) {
+               resolvedItem.count = resolvedIssues.length;
+               shownItems.push(resolvedItem);
+             }
+           }
+
+           var chips = selection.selectAll('.chip').data(shownItems, function (d) {
+             return d.id;
+           });
+           chips.exit().remove();
+           var enter = chips.enter().append('a').attr('class', function (d) {
+             return 'chip ' + d.id + '-count';
+           }).attr('href', '#').each(function (d) {
+             var chipSelection = select(this);
+             var tooltipBehavior = uiTooltip().placement('top').title(_t.html(d.descriptionID));
+             chipSelection.call(tooltipBehavior).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               tooltipBehavior.hide(select(this)); // open the Issues pane
+
+               context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
              });
+             chipSelection.call(svgIcon('#' + d.iconID));
+           });
+           enter.append('span').attr('class', 'count');
+           enter.merge(chips).selectAll('span.count').text(function (d) {
+             return d.count.toString();
            });
-           spritesheets.exit().remove();
          }
 
-         drawDefs.addSprites = addSprites;
-         return drawDefs;
+         return function (selection) {
+           update(selection);
+           context.validator().on('validated.infobox', function () {
+             update(selection);
+           });
+         };
        }
 
-       var _layerEnabled = false;
+       function uiMapInMap(context) {
+         function mapInMap(selection) {
+           var backgroundLayer = rendererTileLayer(context);
+           var overlayLayers = {};
+           var projection = geoRawMercator();
+           var dataLayer = svgData(projection, context).showLabels(false);
+           var debugLayer = svgDebug(projection, context);
+           var zoom = d3_zoom().scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)]).on('start', zoomStarted).on('zoom', zoomed).on('end', zoomEnded);
+           var wrap = select(null);
+           var tiles = select(null);
+           var viewport = select(null);
+           var _isTransformed = false;
+           var _isHidden = true;
+           var _skipEvents = false;
+           var _gesture = null;
+           var _zDiff = 6; // by default, minimap renders at (main zoom - 6)
 
-       var _qaService;
+           var _dMini; // dimensions of minimap
 
-       function svgKeepRight(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           return dispatch.call('change');
-         }, 1000);
 
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+           var _cMini; // center pixel of minimap
 
-         function markerPath(selection, klass) {
-           selection.attr('class', klass).attr('transform', 'translate(-4, -24)').attr('d', 'M11.6,6.2H7.1l1.4-5.1C8.6,0.6,8.1,0,7.5,0H2.2C1.7,0,1.3,0.3,1.3,0.8L0,10.2c-0.1,0.6,0.4,1.1,0.9,1.1h4.6l-1.8,7.6C3.6,19.4,4.1,20,4.7,20c0.3,0,0.6-0.2,0.8-0.5l6.9-11.9C12.7,7,12.3,6.2,11.6,6.2z');
-         } // Loosely-coupled keepRight service for fetching issues.
 
+           var _tStart; // transform at start of gesture
 
-         function getService() {
-           if (services.keepRight && !_qaService) {
-             _qaService = services.keepRight;
 
-             _qaService.on('loaded', throttledRedraw);
-           } else if (!services.keepRight && _qaService) {
-             _qaService = null;
-           }
+           var _tCurr; // transform at most recent event
 
-           return _qaService;
-         } // Show the markers
 
+           var _timeoutID;
 
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer.style('display', 'block');
+           function zoomStarted() {
+             if (_skipEvents) return;
+             _tStart = _tCurr = projection.transform();
+             _gesture = null;
            }
-         } // Immediately remove the markers and their touch targets
 
+           function zoomed(d3_event) {
+             if (_skipEvents) return;
+             var x = d3_event.transform.x;
+             var y = d3_event.transform.y;
+             var k = d3_event.transform.k;
+             var isZooming = k !== _tStart.k;
+             var isPanning = x !== _tStart.x || y !== _tStart.y;
 
-         function editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer.style('display', 'none');
-             drawLayer.selectAll('.qaItem.keepRight').remove();
-             touchLayer.selectAll('.qaItem.keepRight').remove();
-           }
-         } // Enable the layer.  This shows the markers and transitions them to visible.
+             if (!isZooming && !isPanning) {
+               return; // no change
+             } // lock in either zooming or panning, don't allow both in minimap.
 
 
-         function layerOn() {
-           editOn();
-           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-             return dispatch.call('change');
-           });
-         } // Disable the layer.  This transitions the layer invisible and then hides the markers.
+             if (!_gesture) {
+               _gesture = isZooming ? 'zoom' : 'pan';
+             }
 
+             var tMini = projection.transform();
+             var tX, tY, scale;
 
-         function layerOff() {
-           throttledRedraw.cancel();
-           drawLayer.interrupt();
-           touchLayer.selectAll('.qaItem.keepRight').remove();
-           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
-             editOff();
-             dispatch.call('change');
-           });
-         } // Update the issue markers
+             if (_gesture === 'zoom') {
+               scale = k / tMini.k;
+               tX = (_cMini[0] / scale - _cMini[0]) * scale;
+               tY = (_cMini[1] / scale - _cMini[1]) * scale;
+             } else {
+               k = tMini.k;
+               scale = 1;
+               tX = x - tMini.x;
+               tY = y - tMini.y;
+             }
 
+             utilSetTransform(tiles, tX, tY, scale);
+             utilSetTransform(viewport, 0, 0, scale);
+             _isTransformed = true;
+             _tCurr = identity$2.translate(x, y).scale(k);
+             var zMain = geoScaleToZoom(context.projection.scale());
+             var zMini = geoScaleToZoom(k);
+             _zDiff = zMain - zMini;
+             queueRedraw();
+           }
 
-         function updateMarkers() {
-           if (!layerVisible || !_layerEnabled) return;
-           var service = getService();
-           var selectedID = context.selectedErrorID();
-           var data = service ? service.getItems(projection) : [];
-           var getTransform = svgPointTransform(projection); // Draw markers..
+           function zoomEnded() {
+             if (_skipEvents) return;
+             if (_gesture !== 'pan') return;
+             updateProjection();
+             _gesture = null;
+             context.map().center(projection.invert(_cMini)); // recenter main map..
+           }
 
-           var markers = drawLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
-             return d.id;
-           }); // exit
+           function updateProjection() {
+             var loc = context.map().center();
+             var tMain = context.projection.transform();
+             var zMain = geoScaleToZoom(tMain.k);
+             var zMini = Math.max(zMain - _zDiff, 0.5);
+             var kMini = geoZoomToScale(zMini);
+             projection.translate([tMain.x, tMain.y]).scale(kMini);
+             var point = projection(loc);
+             var mouse = _gesture === 'pan' ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
+             var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
+             var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
+             projection.translate([xMini, yMini]).clipExtent([[0, 0], _dMini]);
+             _tCurr = projection.transform();
 
-           markers.exit().remove(); // enter
+             if (_isTransformed) {
+               utilSetTransform(tiles, 0, 0);
+               utilSetTransform(viewport, 0, 0);
+               _isTransformed = false;
+             }
 
-           var markersEnter = markers.enter().append('g').attr('class', function (d) {
-             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
-           });
-           markersEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
-           markersEnter.append('path').call(markerPath, 'shadow');
-           markersEnter.append('use').attr('class', 'qaItem-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-bolt'); // update
+             zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
+             _skipEvents = true;
+             wrap.call(zoom.transform, _tCurr);
+             _skipEvents = false;
+           }
 
-           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
-             return d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+           function redraw() {
+             clearTimeout(_timeoutID);
+             if (_isHidden) return;
+             updateProjection();
+             var zMini = geoScaleToZoom(projection.scale()); // setup tile container
 
-           if (touchLayer.empty()) return;
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var targets = touchLayer.selectAll('.qaItem.keepRight').data(data, function (d) {
-             return d.id;
-           }); // exit
+             tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
+             tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
 
-           targets.exit().remove(); // enter/update
+             backgroundLayer.source(context.background().baseLayerSource()).projection(projection).dimensions(_dMini);
+             var background = tiles.selectAll('.map-in-map-background').data([0]);
+             background.enter().append('div').attr('class', 'map-in-map-background').merge(background).call(backgroundLayer); // redraw overlay
 
-           targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
-             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
-           }).attr('transform', getTransform);
+             var overlaySources = context.background().overlayLayerSources();
+             var activeOverlayLayers = [];
 
-           function sortY(a, b) {
-             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : a.severity === 'error' && b.severity !== 'error' ? 1 : b.severity === 'error' && a.severity !== 'error' ? -1 : b.loc[1] - a.loc[1];
-           }
-         } // Draw the keepRight layer and schedule loading issues and updating markers.
+             for (var i = 0; i < overlaySources.length; i++) {
+               if (overlaySources[i].validZoom(zMini)) {
+                 if (!overlayLayers[i]) overlayLayers[i] = rendererTileLayer(context);
+                 activeOverlayLayers.push(overlayLayers[i].source(overlaySources[i]).projection(projection).dimensions(_dMini));
+               }
+             }
 
+             var overlay = tiles.selectAll('.map-in-map-overlay').data([0]);
+             overlay = overlay.enter().append('div').attr('class', 'map-in-map-overlay').merge(overlay);
+             var overlays = overlay.selectAll('div').data(activeOverlayLayers, function (d) {
+               return d.source().name();
+             });
+             overlays.exit().remove();
+             overlays = overlays.enter().append('div').merge(overlays).each(function (layer) {
+               select(this).call(layer);
+             });
+             var dataLayers = tiles.selectAll('.map-in-map-data').data([0]);
+             dataLayers.exit().remove();
+             dataLayers = dataLayers.enter().append('svg').attr('class', 'map-in-map-data').merge(dataLayers).call(dataLayer).call(debugLayer); // redraw viewport bounding box
 
-         function drawKeepRight(selection) {
-           var service = getService();
-           var surface = context.surface();
+             if (_gesture !== 'pan') {
+               var getPath = d3_geoPath(projection);
+               var bbox = {
+                 type: 'Polygon',
+                 coordinates: [context.map().extent().polygon()]
+               };
+               viewport = wrap.selectAll('.map-in-map-viewport').data([0]);
+               viewport = viewport.enter().append('svg').attr('class', 'map-in-map-viewport').merge(viewport);
+               var path = viewport.selectAll('.map-in-map-bbox').data([bbox]);
+               path.enter().append('path').attr('class', 'map-in-map-bbox').merge(path).attr('d', getPath).classed('thick', function (d) {
+                 return getPath.area(d) < 30;
+               });
+             }
+           }
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
+           function queueRedraw() {
+             clearTimeout(_timeoutID);
+             _timeoutID = setTimeout(function () {
+               redraw();
+             }, 750);
            }
 
-           drawLayer = selection.selectAll('.layer-keepRight').data(service ? [0] : []);
-           drawLayer.exit().remove();
-           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-keepRight').style('display', _layerEnabled ? 'block' : 'none').merge(drawLayer);
+           function toggle(d3_event) {
+             if (d3_event) d3_event.preventDefault();
+             _isHidden = !_isHidden;
+             context.container().select('.minimap-toggle-item').classed('active', !_isHidden).select('input').property('checked', !_isHidden);
 
-           if (_layerEnabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
+             if (_isHidden) {
+               wrap.style('display', 'block').style('opacity', '1').transition().duration(200).style('opacity', '0').on('end', function () {
+                 selection.selectAll('.map-in-map').style('display', 'none');
+               });
              } else {
-               editOff();
+               wrap.style('display', 'block').style('opacity', '0').transition().duration(200).style('opacity', '1').on('end', function () {
+                 redraw();
+               });
              }
            }
-         } // Toggles the layer on and off
-
 
-         drawKeepRight.enabled = function (val) {
-           if (!arguments.length) return _layerEnabled;
-           _layerEnabled = val;
+           uiMapInMap.toggle = toggle;
+           wrap = selection.selectAll('.map-in-map').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'map-in-map').style('display', _isHidden ? 'none' : 'block').call(zoom).on('dblclick.zoom', null).merge(wrap); // reflow warning: Hardcode dimensions - currently can't resize it anyway..
 
-           if (_layerEnabled) {
-             layerOn();
-           } else {
-             layerOff();
+           _dMini = [200, 150]; //utilGetDimensions(wrap);
 
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
+           _cMini = geoVecScale(_dMini, 0.5);
+           context.map().on('drawn.map-in-map', function (drawn) {
+             if (drawn.full === true) {
+               redraw();
              }
+           });
+           redraw();
+           context.keybinding().on(_t('background.minimap.key'), toggle);
+         }
+
+         return mapInMap;
+       }
+
+       function uiNotice(context) {
+         return function (selection) {
+           var div = selection.append('div').attr('class', 'notice');
+           var button = div.append('button').attr('class', 'zoom-to notice fillD').on('click', function () {
+             context.map().zoomEase(context.minEditableZoom());
+           }).on('wheel', function (d3_event) {
+             // let wheel events pass through #4482
+             var e2 = new WheelEvent(d3_event.type, d3_event);
+             context.surface().node().dispatchEvent(e2);
+           });
+           button.call(svgIcon('#iD-icon-plus', 'pre-text')).append('span').attr('class', 'label').call(_t.append('zoom_in_edit'));
+
+           function disableTooHigh() {
+             var canEdit = context.map().zoom() >= context.minEditableZoom();
+             div.style('display', canEdit ? 'none' : 'block');
            }
 
-           dispatch.call('change');
-           return this;
+           context.map().on('move.notice', debounce(disableTooHigh, 500));
+           disableTooHigh();
          };
+       }
 
-         drawKeepRight.supported = function () {
-           return !!getService();
-         };
+       function uiPhotoviewer(context) {
+         var dispatch = dispatch$8('resize');
 
-         return drawKeepRight;
-       }
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-       function svgGeolocate(projection) {
-         var layer = select(null);
+         function photoviewer(selection) {
+           selection.append('button').attr('class', 'thumb-hide').attr('title', _t('icons.close')).on('click', function () {
+             if (services.streetside) {
+               services.streetside.hideViewer(context);
+             }
 
-         var _position;
+             if (services.mapillary) {
+               services.mapillary.hideViewer(context);
+             }
 
-         function init() {
-           if (svgGeolocate.initialized) return; // run once
+             if (services.kartaview) {
+               services.kartaview.hideViewer(context);
+             }
+           }).append('div').call(svgIcon('#iD-icon-close'));
 
-           svgGeolocate.enabled = false;
-           svgGeolocate.initialized = true;
-         }
+           function preventDefault(d3_event) {
+             d3_event.preventDefault();
+           }
 
-         function showLayer() {
-           layer.style('display', 'block');
-         }
+           selection.append('button').attr('class', 'resize-handle-xy').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+             resizeOnX: true,
+             resizeOnY: true
+           }));
+           selection.append('button').attr('class', 'resize-handle-x').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+             resizeOnX: true
+           }));
+           selection.append('button').attr('class', 'resize-handle-y').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch, {
+             resizeOnY: true
+           }));
 
-         function hideLayer() {
-           layer.transition().duration(250).style('opacity', 0);
-         }
+           function buildResizeListener(target, eventName, dispatch, options) {
+             var resizeOnX = !!options.resizeOnX;
+             var resizeOnY = !!options.resizeOnY;
+             var minHeight = options.minHeight || 240;
+             var minWidth = options.minWidth || 320;
+             var pointerId;
+             var startX;
+             var startY;
+             var startWidth;
+             var startHeight;
 
-         function layerOn() {
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1);
-         }
+             function startResize(d3_event) {
+               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               var mapSize = context.map().dimensions();
 
-         function layerOff() {
-           layer.style('display', 'none');
-         }
+               if (resizeOnX) {
+                 var maxWidth = mapSize[0];
+                 var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
+                 target.style('width', newWidth + 'px');
+               }
 
-         function transform(d) {
-           return svgPointTransform(projection)(d);
-         }
+               if (resizeOnY) {
+                 var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
 
-         function accuracy(accuracy, loc) {
-           // converts accuracy to pixels...
-           var degreesRadius = geoMetersToLat(accuracy),
-               tangentLoc = [loc[0], loc[1] + degreesRadius],
-               projectedTangent = projection(tangentLoc),
-               projectedLoc = projection([loc[0], loc[1]]); // southern most point will have higher pixel value...
+                 var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
+                 target.style('height', newHeight + 'px');
+               }
 
-           return Math.round(projectedLoc[1] - projectedTangent[1]).toString();
-         }
+               dispatch.call(eventName, target, utilGetDimensions(target, true));
+             }
 
-         function update() {
-           var geolocation = {
-             loc: [_position.coords.longitude, _position.coords.latitude]
-           };
-           var groups = layer.selectAll('.geolocations').selectAll('.geolocation').data([geolocation]);
-           groups.exit().remove();
-           var pointsEnter = groups.enter().append('g').attr('class', 'geolocation');
-           pointsEnter.append('circle').attr('class', 'geolocate-radius').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('fill-opacity', '0.3').attr('r', '0');
-           pointsEnter.append('circle').attr('dx', '0').attr('dy', '0').attr('fill', 'rgb(15,128,225)').attr('stroke', 'white').attr('stroke-width', '1.5').attr('r', '6');
-           groups.merge(pointsEnter).attr('transform', transform);
-           layer.select('.geolocate-radius').attr('r', accuracy(_position.coords.accuracy, geolocation.loc));
-         }
+             function clamp(num, min, max) {
+               return Math.max(min, Math.min(num, max));
+             }
 
-         function drawLocation(selection) {
-           var enabled = svgGeolocate.enabled;
-           layer = selection.selectAll('.layer-geolocate').data([0]);
-           layer.exit().remove();
-           var layerEnter = layer.enter().append('g').attr('class', 'layer-geolocate').style('display', enabled ? 'block' : 'none');
-           layerEnter.append('g').attr('class', 'geolocations');
-           layer = layerEnter.merge(layer);
+             function stopResize(d3_event) {
+               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+               d3_event.preventDefault();
+               d3_event.stopPropagation(); // remove all the listeners we added
 
-           if (enabled) {
-             update();
-           } else {
-             layerOff();
+               select(window).on('.' + eventName, null);
+             }
+
+             return function initResize(d3_event) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               pointerId = d3_event.pointerId || 'mouse';
+               startX = d3_event.clientX;
+               startY = d3_event.clientY;
+               var targetRect = target.node().getBoundingClientRect();
+               startWidth = targetRect.width;
+               startHeight = targetRect.height;
+               select(window).on(_pointerPrefix + 'move.' + eventName, startResize, false).on(_pointerPrefix + 'up.' + eventName, stopResize, false);
+
+               if (_pointerPrefix === 'pointer') {
+                 select(window).on('pointercancel.' + eventName, stopResize, false);
+               }
+             };
            }
          }
 
-         drawLocation.enabled = function (position, enabled) {
-           if (!arguments.length) return svgGeolocate.enabled;
-           _position = position;
-           svgGeolocate.enabled = enabled;
+         photoviewer.onMapResize = function () {
+           var photoviewer = context.container().select('.photoviewer');
+           var content = context.container().select('.main-content');
+           var mapDimensions = utilGetDimensions(content, true); // shrink photo viewer if it is too big
+           // (-90 preserves space at top and bottom of map used by menus)
 
-           if (svgGeolocate.enabled) {
-             showLayer();
-             layerOn();
-           } else {
-             hideLayer();
-           }
+           var photoDimensions = utilGetDimensions(photoviewer, true);
 
-           return this;
+           if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > mapDimensions[1] - 90) {
+             var setPhotoDimensions = [Math.min(photoDimensions[0], mapDimensions[0]), Math.min(photoDimensions[1], mapDimensions[1] - 90)];
+             photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
+             dispatch.call('resize', photoviewer, setPhotoDimensions);
+           }
          };
 
-         init();
-         return drawLocation;
+         return utilRebind(photoviewer, dispatch, 'on');
        }
 
-       function svgLabels(projection, context) {
-         var path = d3_geoPath(projection);
-         var detected = utilDetect();
-         var baselineHack = detected.ie || detected.browser.toLowerCase() === 'edge' || detected.browser.toLowerCase() === 'firefox' && detected.version >= 70;
-
-         var _rdrawn = new RBush();
-
-         var _rskipped = new RBush();
-
-         var _textWidthCache = {};
-         var _entitybboxes = {}; // Listed from highest to lowest priority
-
-         var labelStack = [['line', 'aeroway', '*', 12], ['line', 'highway', 'motorway', 12], ['line', 'highway', 'trunk', 12], ['line', 'highway', 'primary', 12], ['line', 'highway', 'secondary', 12], ['line', 'highway', 'tertiary', 12], ['line', 'highway', '*', 12], ['line', 'railway', '*', 12], ['line', 'waterway', '*', 12], ['area', 'aeroway', '*', 12], ['area', 'amenity', '*', 12], ['area', 'building', '*', 12], ['area', 'historic', '*', 12], ['area', 'leisure', '*', 12], ['area', 'man_made', '*', 12], ['area', 'natural', '*', 12], ['area', 'shop', '*', 12], ['area', 'tourism', '*', 12], ['area', 'camp_site', '*', 12], ['point', 'aeroway', '*', 10], ['point', 'amenity', '*', 10], ['point', 'building', '*', 10], ['point', 'historic', '*', 10], ['point', 'leisure', '*', 10], ['point', 'man_made', '*', 10], ['point', 'natural', '*', 10], ['point', 'shop', '*', 10], ['point', 'tourism', '*', 10], ['point', 'camp_site', '*', 10], ['line', 'name', '*', 12], ['area', 'name', '*', 12], ['point', 'name', '*', 10]];
-
-         function shouldSkipIcon(preset) {
-           var noIcons = ['building', 'landuse', 'natural'];
-           return noIcons.some(function (s) {
-             return preset.id.indexOf(s) >= 0;
+       function uiRestore(context) {
+         return function (selection) {
+           if (!context.history().hasRestorableChanges()) return;
+           var modalSelection = uiModal(selection, true);
+           modalSelection.select('.modal').attr('class', 'modal fillL');
+           var introModal = modalSelection.select('.content');
+           introModal.append('div').attr('class', 'modal-section').append('h3').call(_t.append('restore.heading'));
+           introModal.append('div').attr('class', 'modal-section').append('p').call(_t.append('restore.description'));
+           var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+           var restore = buttonWrap.append('button').attr('class', 'restore').on('click', function () {
+             context.history().restore();
+             modalSelection.remove();
            });
-         }
+           restore.append('svg').attr('class', 'logo logo-restore').append('use').attr('xlink:href', '#iD-logo-restore');
+           restore.append('div').call(_t.append('restore.restore'));
+           var reset = buttonWrap.append('button').attr('class', 'reset').on('click', function () {
+             context.history().clearSaved();
+             modalSelection.remove();
+           });
+           reset.append('svg').attr('class', 'logo logo-reset').append('use').attr('xlink:href', '#iD-logo-reset');
+           reset.append('div').call(_t.append('restore.reset'));
+           restore.node().focus();
+         };
+       }
 
-         function get(array, prop) {
-           return function (d, i) {
-             return array[i][prop];
-           };
-         }
+       function uiScale(context) {
+         var projection = context.projection,
+             isImperial = !_mainLocalizer.usesMetric(),
+             maxLength = 180,
+             tickHeight = 8;
 
-         function textWidth(text, size, elem) {
-           var c = _textWidthCache[size];
-           if (!c) c = _textWidthCache[size] = {};
+         function scaleDefs(loc1, loc2) {
+           var lat = (loc2[1] + loc1[1]) / 2,
+               conversion = isImperial ? 3.28084 : 1,
+               dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
+               scale = {
+             dist: 0,
+             px: 0,
+             text: ''
+           },
+               buckets,
+               i,
+               val,
+               dLon;
 
-           if (c[text]) {
-             return c[text];
-           } else if (elem) {
-             c[text] = elem.getComputedTextLength();
-             return c[text];
+           if (isImperial) {
+             buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
            } else {
-             var str = encodeURIComponent(text).match(/%[CDEFcdef]/g);
+             buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
+           } // determine a user-friendly endpoint for the scale
 
-             if (str === null) {
-               return size / 3 * 2 * text.length;
+
+           for (i = 0; i < buckets.length; i++) {
+             val = buckets[i];
+
+             if (dist >= val) {
+               scale.dist = Math.floor(dist / val) * val;
+               break;
              } else {
-               return size / 3 * (2 * text.length + str.length);
+               scale.dist = +dist.toFixed(2);
              }
            }
-         }
-
-         function drawLinePaths(selection, entities, filter, classes, labels) {
-           var paths = selection.selectAll('path').filter(filter).data(entities, osmEntity.key); // exit
 
-           paths.exit().remove(); // enter/update
+           dLon = geoMetersToLon(scale.dist / conversion, lat);
+           scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
+           scale.text = displayLength(scale.dist / conversion, isImperial);
+           return scale;
+         }
 
-           paths.enter().append('path').style('stroke-width', get(labels, 'font-size')).attr('id', function (d) {
-             return 'ideditor-labelpath-' + d.id;
-           }).attr('class', classes).merge(paths).attr('d', get(labels, 'lineString'));
+         function update(selection) {
+           // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
+           var dims = context.map().dimensions(),
+               loc1 = projection.invert([0, dims[1]]),
+               loc2 = projection.invert([maxLength, dims[1]]),
+               scale = scaleDefs(loc1, loc2);
+           selection.select('.scale-path').attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
+           selection.select('.scale-text').style(_mainLocalizer.textDirection() === 'ltr' ? 'left' : 'right', scale.px + 16 + 'px').text(scale.text);
          }
 
-         function drawLineLabels(selection, entities, filter, classes, labels) {
-           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+         return function (selection) {
+           function switchUnits() {
+             isImperial = !isImperial;
+             selection.call(update);
+           }
 
-           texts.exit().remove(); // enter
+           var scalegroup = selection.append('svg').attr('class', 'scale').on('click', switchUnits).append('g').attr('transform', 'translate(10,11)');
+           scalegroup.append('path').attr('class', 'scale-path');
+           selection.append('div').attr('class', 'scale-text');
+           selection.call(update);
+           context.map().on('move.scale', function () {
+             update(selection);
+           });
+         };
+       }
 
-           texts.enter().append('text').attr('class', function (d, i) {
-             return classes + ' ' + labels[i].classes + ' ' + d.id;
-           }).attr('dy', baselineHack ? '0.35em' : null).append('textPath').attr('class', 'textpath'); // update
+       function uiShortcuts(context) {
+         var detected = utilDetect();
+         var _activeTab = 0;
 
-           selection.selectAll('text.' + classes).selectAll('.textpath').filter(filter).data(entities, osmEntity.key).attr('startOffset', '50%').attr('xlink:href', function (d) {
-             return '#ideditor-labelpath-' + d.id;
-           }).text(utilDisplayNameForPath);
-         }
+         var _modalSelection;
 
-         function drawPointLabels(selection, entities, filter, classes, labels) {
-           var texts = selection.selectAll('text.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+         var _selection = select(null);
 
-           texts.exit().remove(); // enter/update
+         var _dataShortcuts;
 
-           texts.enter().append('text').attr('class', function (d, i) {
-             return classes + ' ' + labels[i].classes + ' ' + d.id;
-           }).merge(texts).attr('x', get(labels, 'x')).attr('y', get(labels, 'y')).style('text-anchor', get(labels, 'textAnchor')).text(utilDisplayName).each(function (d, i) {
-             textWidth(utilDisplayName(d), labels[i].height, this);
-           });
-         }
+         function shortcutsModal(_modalSelection) {
+           _modalSelection.select('.modal').classed('modal-shortcuts', true);
 
-         function drawAreaLabels(selection, entities, filter, classes, labels) {
-           entities = entities.filter(hasText);
-           labels = labels.filter(hasText);
-           drawPointLabels(selection, entities, filter, classes, labels);
+           var content = _modalSelection.select('.content');
 
-           function hasText(d, i) {
-             return labels[i].hasOwnProperty('x') && labels[i].hasOwnProperty('y');
-           }
+           content.append('div').attr('class', 'modal-section header').append('h2').call(_t.append('shortcuts.title'));
+           _mainFileFetcher.get('shortcuts').then(function (data) {
+             _dataShortcuts = data;
+             content.call(render);
+           })["catch"](function () {
+             /* ignore */
+           });
          }
 
-         function drawAreaIcons(selection, entities, filter, classes, labels) {
-           var icons = selection.selectAll('use.' + classes).filter(filter).data(entities, osmEntity.key); // exit
+         function render(selection) {
+           if (!_dataShortcuts) return;
+           var wrapper = selection.selectAll('.wrapper').data([0]);
+           var wrapperEnter = wrapper.enter().append('div').attr('class', 'wrapper modal-section');
+           var tabsBar = wrapperEnter.append('div').attr('class', 'tabs-bar');
+           var shortcutsList = wrapperEnter.append('div').attr('class', 'shortcuts-list');
+           wrapper = wrapper.merge(wrapperEnter);
+           var tabs = tabsBar.selectAll('.tab').data(_dataShortcuts);
+           var tabsEnter = tabs.enter().append('a').attr('class', 'tab').attr('href', '#').on('click', function (d3_event, d) {
+             d3_event.preventDefault();
 
-           icons.exit().remove(); // enter/update
+             var i = _dataShortcuts.indexOf(d);
 
-           icons.enter().append('use').attr('class', 'icon ' + classes).attr('width', '17px').attr('height', '17px').merge(icons).attr('transform', get(labels, 'transform')).attr('xlink:href', function (d) {
-             var preset = _mainPresetIndex.match(d, context.graph());
-             var picon = preset && preset.icon;
+             _activeTab = i;
+             render(selection);
+           });
+           tabsEnter.append('span').html(function (d) {
+             return _t.html(d.text);
+           }); // Update
 
-             if (!picon) {
-               return '';
+           wrapper.selectAll('.tab').classed('active', function (d, i) {
+             return i === _activeTab;
+           });
+           var shortcuts = shortcutsList.selectAll('.shortcut-tab').data(_dataShortcuts);
+           var shortcutsEnter = shortcuts.enter().append('div').attr('class', function (d) {
+             return 'shortcut-tab shortcut-tab-' + d.tab;
+           });
+           var columnsEnter = shortcutsEnter.selectAll('.shortcut-column').data(function (d) {
+             return d.columns;
+           }).enter().append('table').attr('class', 'shortcut-column');
+           var rowsEnter = columnsEnter.selectAll('.shortcut-row').data(function (d) {
+             return d.rows;
+           }).enter().append('tr').attr('class', 'shortcut-row');
+           var sectionRows = rowsEnter.filter(function (d) {
+             return !d.shortcuts;
+           });
+           sectionRows.append('td');
+           sectionRows.append('td').attr('class', 'shortcut-section').append('h3').html(function (d) {
+             return _t.html(d.text);
+           });
+           var shortcutRows = rowsEnter.filter(function (d) {
+             return d.shortcuts;
+           });
+           var shortcutKeys = shortcutRows.append('td').attr('class', 'shortcut-keys');
+           var modifierKeys = shortcutKeys.filter(function (d) {
+             return d.modifiers;
+           });
+           modifierKeys.selectAll('kbd.modifier').data(function (d) {
+             if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+               return ['⌘'];
+             } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+               return [];
              } else {
-               var isMaki = /^maki-/.test(picon);
-               return '#' + picon + (isMaki ? '-15' : '');
+               return d.modifiers;
              }
+           }).enter().each(function () {
+             var selection = select(this);
+             selection.append('kbd').attr('class', 'modifier').text(function (d) {
+               return uiCmd.display(d);
+             });
+             selection.append('span').text('+');
            });
-         }
+           shortcutKeys.selectAll('kbd.shortcut').data(function (d) {
+             var arr = d.shortcuts;
 
-         function drawCollisionBoxes(selection, rtree, which) {
-           var classes = 'debug ' + which + ' ' + (which === 'debug-skipped' ? 'orange' : 'yellow');
-           var gj = [];
+             if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
+               arr = ['Y'];
+             } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
+               arr = ['F11'];
+             } // replace translations
 
-           if (context.getDebug('collision')) {
-             gj = rtree.all().map(function (d) {
+
+             arr = arr.map(function (s) {
+               return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
+             });
+             return utilArrayUniq(arr).map(function (s) {
                return {
-                 type: 'Polygon',
-                 coordinates: [[[d.minX, d.minY], [d.maxX, d.minY], [d.maxX, d.maxY], [d.minX, d.maxY], [d.minX, d.minY]]]
+                 shortcut: s,
+                 separator: d.separator,
+                 suffix: d.suffix
                };
              });
-           }
-
-           var boxes = selection.selectAll('.' + which).data(gj); // exit
-
-           boxes.exit().remove(); // enter/update
-
-           boxes.enter().append('path').attr('class', classes).merge(boxes).attr('d', d3_geoPath());
-         }
-
-         function drawLabels(selection, graph, entities, filter, dimensions, fullRedraw) {
-           var wireframe = context.surface().classed('fill-wireframe');
-           var zoom = geoScaleToZoom(projection.scale());
-           var labelable = [];
-           var renderNodeAs = {};
-           var i, j, k, entity, geometry;
-
-           for (i = 0; i < labelStack.length; i++) {
-             labelable.push([]);
-           }
-
-           if (fullRedraw) {
-             _rdrawn.clear();
-
-             _rskipped.clear();
-
-             _entitybboxes = {};
-           } else {
-             for (i = 0; i < entities.length; i++) {
-               entity = entities[i];
-               var toRemove = [].concat(_entitybboxes[entity.id] || []).concat(_entitybboxes[entity.id + 'I'] || []);
-
-               for (j = 0; j < toRemove.length; j++) {
-                 _rdrawn.remove(toRemove[j]);
+           }).enter().each(function (d, i, nodes) {
+             var selection = select(this);
+             var click = d.shortcut.toLowerCase().match(/(.*).click/);
 
-                 _rskipped.remove(toRemove[j]);
-               }
+             if (click && click[1]) {
+               // replace "left_click", "right_click" with mouse icon
+               selection.call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
+             } else if (d.shortcut.toLowerCase() === 'long-press') {
+               selection.call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
+             } else if (d.shortcut.toLowerCase() === 'tap') {
+               selection.call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
+             } else {
+               selection.append('kbd').attr('class', 'shortcut').text(function (d) {
+                 return d.shortcut;
+               });
              }
-           } // Loop through all the entities to do some preprocessing
-
-
-           for (i = 0; i < entities.length; i++) {
-             entity = entities[i];
-             geometry = entity.geometry(graph); // Insert collision boxes around interesting points/vertices
-
-             if (geometry === 'point' || geometry === 'vertex' && isInterestingVertex(entity)) {
-               var hasDirections = entity.directions(graph, projection).length;
-               var markerPadding;
-
-               if (!wireframe && geometry === 'point' && !(zoom >= 18 && hasDirections)) {
-                 renderNodeAs[entity.id] = 'point';
-                 markerPadding = 20; // extra y for marker height
-               } else {
-                 renderNodeAs[entity.id] = 'vertex';
-                 markerPadding = 0;
-               }
 
-               var coord = projection(entity.loc);
-               var nodePadding = 10;
-               var bbox = {
-                 minX: coord[0] - nodePadding,
-                 minY: coord[1] - nodePadding - markerPadding,
-                 maxX: coord[0] + nodePadding,
-                 maxY: coord[1] + nodePadding
-               };
-               doInsert(bbox, entity.id + 'P');
-             } // From here on, treat vertices like points
+             if (i < nodes.length - 1) {
+               selection.append('span').html(d.separator || "\xA0" + _t.html('shortcuts.or') + "\xA0");
+             } else if (i === nodes.length - 1 && d.suffix) {
+               selection.append('span').text(d.suffix);
+             }
+           });
+           shortcutKeys.filter(function (d) {
+             return d.gesture;
+           }).each(function () {
+             var selection = select(this);
+             selection.append('span').text('+');
+             selection.append('span').attr('class', 'gesture').html(function (d) {
+               return _t.html(d.gesture);
+             });
+           });
+           shortcutRows.append('td').attr('class', 'shortcut-desc').html(function (d) {
+             return d.text ? _t.html(d.text) : "\xA0";
+           }); // Update
 
+           wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
+             return i === _activeTab ? 'flex' : 'none';
+           });
+         }
 
-             if (geometry === 'vertex') {
-               geometry = 'point';
-             } // Determine which entities are label-able
+         return function (selection, show) {
+           _selection = selection;
 
+           if (show) {
+             _modalSelection = uiModal(selection);
 
-             var preset = geometry === 'area' && _mainPresetIndex.match(entity, graph);
-             var icon = preset && !shouldSkipIcon(preset) && preset.icon;
-             if (!icon && !utilDisplayName(entity)) continue;
+             _modalSelection.call(shortcutsModal);
+           } else {
+             context.keybinding().on([_t('shortcuts.toggle.key'), '?'], function () {
+               if (context.container().selectAll('.modal-shortcuts').size()) {
+                 // already showing
+                 if (_modalSelection) {
+                   _modalSelection.close();
 
-             for (k = 0; k < labelStack.length; k++) {
-               var matchGeom = labelStack[k][0];
-               var matchKey = labelStack[k][1];
-               var matchVal = labelStack[k][2];
-               var hasVal = entity.tags[matchKey];
+                   _modalSelection = null;
+                 }
+               } else {
+                 _modalSelection = uiModal(_selection);
 
-               if (geometry === matchGeom && hasVal && (matchVal === '*' || matchVal === hasVal)) {
-                 labelable[k].push(entity);
-                 break;
+                 _modalSelection.call(shortcutsModal);
                }
-             }
+             });
            }
+         };
+       }
 
-           var positions = {
-             point: [],
-             line: [],
-             area: []
-           };
-           var labelled = {
-             point: [],
-             line: [],
-             area: []
-           }; // Try and find a valid label for labellable entities
+       function uiDataHeader() {
+         var _datum;
 
-           for (k = 0; k < labelable.length; k++) {
-             var fontSize = labelStack[k][3];
+         function dataHeader(selection) {
+           var header = selection.selectAll('.data-header').data(_datum ? [_datum] : [], function (d) {
+             return d.__featurehash__;
+           });
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'data-header');
+           var iconEnter = headerEnter.append('div').attr('class', 'data-header-icon');
+           iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-data', 'note-fill'));
+           headerEnter.append('div').attr('class', 'data-header-label').call(_t.append('map_data.layers.custom.title'));
+         }
 
-             for (i = 0; i < labelable[k].length; i++) {
-               entity = labelable[k][i];
-               geometry = entity.geometry(graph);
-               var getName = geometry === 'line' ? utilDisplayNameForPath : utilDisplayName;
-               var name = getName(entity);
-               var width = name && textWidth(name, fontSize);
-               var p = null;
+         dataHeader.datum = function (val) {
+           if (!arguments.length) return _datum;
+           _datum = val;
+           return this;
+         };
 
-               if (geometry === 'point' || geometry === 'vertex') {
-                 // no point or vertex labels in wireframe mode
-                 // no vertex labels at low zooms (vertices have no icons)
-                 if (wireframe) continue;
-                 var renderAs = renderNodeAs[entity.id];
-                 if (renderAs === 'vertex' && zoom < 17) continue;
-                 p = getPointLabel(entity, width, fontSize, renderAs);
-               } else if (geometry === 'line') {
-                 p = getLineLabel(entity, width, fontSize);
-               } else if (geometry === 'area') {
-                 p = getAreaLabel(entity, width, fontSize);
-               }
+         return dataHeader;
+       }
 
-               if (p) {
-                 if (geometry === 'vertex') {
-                   geometry = 'point';
-                 } // treat vertex like point
+       // It is keyed on the `value` of the entry. Data should be an array of objects like:
+       //   [{
+       //       value:   'string value',  // required
+       //       display: 'label html'     // optional
+       //       title:   'hover text'     // optional
+       //       terms:   ['search terms'] // optional
+       //   }, ...]
 
+       var _comboHideTimerID;
 
-                 p.classes = geometry + ' tag-' + labelStack[k][1];
-                 positions[geometry].push(p);
-                 labelled[geometry].push(entity);
-               }
-             }
-           }
+       function uiCombobox(context, klass) {
+         var dispatch = dispatch$8('accept', 'cancel');
+         var container = context.container();
+         var _suggestions = [];
+         var _data = [];
+         var _fetched = {};
+         var _selected = null;
+         var _canAutocomplete = true;
+         var _caseSensitive = false;
+         var _cancelFetch = false;
+         var _minItems = 2;
+         var _tDown = 0;
 
-           function isInterestingVertex(entity) {
-             var selectedIDs = context.selectedIDs();
-             return entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || selectedIDs.indexOf(entity.id) !== -1 || graph.parentWays(entity).some(function (parent) {
-               return selectedIDs.indexOf(parent.id) !== -1;
-             });
-           }
+         var _mouseEnterHandler, _mouseLeaveHandler;
 
-           function getPointLabel(entity, width, height, geometry) {
-             var y = geometry === 'point' ? -12 : 0;
-             var pointOffsets = {
-               ltr: [15, y, 'start'],
-               rtl: [-15, y, 'end']
-             };
-             var textDirection = _mainLocalizer.textDirection();
-             var coord = projection(entity.loc);
-             var textPadding = 2;
-             var offset = pointOffsets[textDirection];
-             var p = {
-               height: height,
-               width: width,
-               x: coord[0] + offset[0],
-               y: coord[1] + offset[1],
-               textAnchor: offset[2]
-             }; // insert a collision box for the text label..
+         var _fetcher = function _fetcher(val, cb) {
+           cb(_data.filter(function (d) {
+             var terms = d.terms || [];
+             terms.push(d.value);
+             return terms.some(function (term) {
+               return term.toString().toLowerCase().indexOf(val.toLowerCase()) !== -1;
+             });
+           }));
+         };
 
-             var bbox;
+         var combobox = function combobox(input, attachTo) {
+           if (!input || input.empty()) return;
+           input.classed('combobox-input', true).on('focus.combo-input', focus).on('blur.combo-input', blur).on('keydown.combo-input', keydown).on('keyup.combo-input', keyup).on('input.combo-input', change).on('mousedown.combo-input', mousedown).each(function () {
+             var parent = this.parentNode;
+             var sibling = this.nextSibling;
+             select(parent).selectAll('.combobox-caret').filter(function (d) {
+               return d === input.node();
+             }).data([input.node()]).enter().insert('div', function () {
+               return sibling;
+             }).attr('class', 'combobox-caret').on('mousedown.combo-caret', function (d3_event) {
+               d3_event.preventDefault(); // don't steal focus from input
 
-             if (textDirection === 'rtl') {
-               bbox = {
-                 minX: p.x - width - textPadding,
-                 minY: p.y - height / 2 - textPadding,
-                 maxX: p.x + textPadding,
-                 maxY: p.y + height / 2 + textPadding
-               };
-             } else {
-               bbox = {
-                 minX: p.x - textPadding,
-                 minY: p.y - height / 2 - textPadding,
-                 maxX: p.x + width + textPadding,
-                 maxY: p.y + height / 2 + textPadding
-               };
-             }
+               input.node().focus(); // focus the input as if it was clicked
 
-             if (tryInsert([bbox], entity.id, true)) {
-               return p;
-             }
-           }
+               mousedown(d3_event);
+             }).on('mouseup.combo-caret', function (d3_event) {
+               d3_event.preventDefault(); // don't steal focus from input
 
-           function getLineLabel(entity, width, height) {
-             var viewport = geoExtent(context.projection.clipExtent()).polygon();
-             var points = graph.childNodes(entity).map(function (node) {
-               return projection(node.loc);
+               mouseup(d3_event);
              });
-             var length = geoPathLength(points);
-             if (length < width + 20) return; // % along the line to attempt to place the label
-
-             var lineOffsets = [50, 45, 55, 40, 60, 35, 65, 30, 70, 25, 75, 20, 80, 15, 95, 10, 90, 5, 95];
-             var padding = 3;
-
-             for (var i = 0; i < lineOffsets.length; i++) {
-               var offset = lineOffsets[i];
-               var middle = offset / 100 * length;
-               var start = middle - width / 2;
-               if (start < 0 || start + width > length) continue; // generate subpath and ignore paths that are invalid or don't cross viewport.
+           });
 
-               var sub = subpath(points, start, start + width);
+           function mousedown(d3_event) {
+             if (d3_event.button !== 0) return; // left click only
 
-               if (!sub || !geoPolygonIntersectsPolygon(viewport, sub, true)) {
-                 continue;
-               }
+             if (input.classed('disabled')) return;
+             _tDown = +new Date(); // clear selection
 
-               var isReverse = reverse(sub);
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
 
-               if (isReverse) {
-                 sub = sub.reverse();
-               }
+             if (start !== end) {
+               var val = utilGetSetValue(input);
+               input.node().setSelectionRange(val.length, val.length);
+               return;
+             }
 
-               var bboxes = [];
-               var boxsize = (height + 2) / 2;
+             input.on('mouseup.combo-input', mouseup);
+           }
 
-               for (var j = 0; j < sub.length - 1; j++) {
-                 var a = sub[j];
-                 var b = sub[j + 1]; // split up the text into small collision boxes
+           function mouseup(d3_event) {
+             input.on('mouseup.combo-input', null);
+             if (d3_event.button !== 0) return; // left click only
 
-                 var num = Math.max(1, Math.floor(geoVecLength(a, b) / boxsize / 2));
+             if (input.classed('disabled')) return;
+             if (input.node() !== document.activeElement) return; // exit if this input is not focused
 
-                 for (var box = 0; box < num; box++) {
-                   var p = geoVecInterp(a, b, box / num);
-                   var x0 = p[0] - boxsize - padding;
-                   var y0 = p[1] - boxsize - padding;
-                   var x1 = p[0] + boxsize + padding;
-                   var y1 = p[1] + boxsize + padding;
-                   bboxes.push({
-                     minX: Math.min(x0, x1),
-                     minY: Math.min(y0, y1),
-                     maxX: Math.max(x0, x1),
-                     maxY: Math.max(y0, y1)
-                   });
-                 }
-               }
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
+             if (start !== end) return; // exit if user is selecting
+             // not showing or showing for a different field - try to show it.
 
-               if (tryInsert(bboxes, entity.id, false)) {
-                 // accept this one
-                 return {
-                   'font-size': height + 2,
-                   lineString: lineString(sub),
-                   startOffset: offset + '%'
-                 };
-               }
-             }
+             var combo = container.selectAll('.combobox');
 
-             function reverse(p) {
-               var angle = Math.atan2(p[1][1] - p[0][1], p[1][0] - p[0][0]);
-               return !(p[0][0] < p[p.length - 1][0] && angle < Math.PI / 2 && angle > -Math.PI / 2);
-             }
+             if (combo.empty() || combo.datum() !== input.node()) {
+               var tOrig = _tDown;
+               window.setTimeout(function () {
+                 if (tOrig !== _tDown) return; // exit if user double clicked
 
-             function lineString(points) {
-               return 'M' + points.join('L');
+                 fetchComboData('', function () {
+                   show();
+                   render();
+                 });
+               }, 250);
+             } else {
+               hide();
              }
+           }
 
-             function subpath(points, from, to) {
-               var sofar = 0;
-               var start, end, i0, i1;
-
-               for (var i = 0; i < points.length - 1; i++) {
-                 var a = points[i];
-                 var b = points[i + 1];
-                 var current = geoVecLength(a, b);
-                 var portion;
+           function focus() {
+             fetchComboData(''); // prefetch values (may warm taginfo cache)
+           }
 
-                 if (!start && sofar + current >= from) {
-                   portion = (from - sofar) / current;
-                   start = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
-                   i0 = i + 1;
-                 }
+           function blur() {
+             _comboHideTimerID = window.setTimeout(hide, 75);
+           }
 
-                 if (!end && sofar + current >= to) {
-                   portion = (to - sofar) / current;
-                   end = [a[0] + portion * (b[0] - a[0]), a[1] + portion * (b[1] - a[1])];
-                   i1 = i + 1;
-                 }
+           function show() {
+             hide(); // remove any existing
 
-                 sofar += current;
-               }
+             container.insert('div', ':first-child').datum(input.node()).attr('class', 'combobox' + (klass ? ' combobox-' + klass : '')).style('position', 'absolute').style('display', 'block').style('left', '0px').on('mousedown.combo-container', function (d3_event) {
+               // prevent moving focus out of the input field
+               d3_event.preventDefault();
+             });
+             container.on('scroll.combo-scroll', render, true);
+           }
 
-               var result = points.slice(i0, i1);
-               result.unshift(start);
-               result.push(end);
-               return result;
+           function hide() {
+             if (_comboHideTimerID) {
+               window.clearTimeout(_comboHideTimerID);
+               _comboHideTimerID = undefined;
              }
+
+             container.selectAll('.combobox').remove();
+             container.on('scroll.combo-scroll', null);
            }
 
-           function getAreaLabel(entity, width, height) {
-             var centroid = path.centroid(entity.asGeoJSON(graph, true));
-             var extent = entity.extent(graph);
-             var areaWidth = projection(extent[1])[0] - projection(extent[0])[0];
-             if (isNaN(centroid[0]) || areaWidth < 20) return;
-             var preset = _mainPresetIndex.match(entity, context.graph());
-             var picon = preset && preset.icon;
-             var iconSize = 17;
-             var padding = 2;
-             var p = {};
+           function keydown(d3_event) {
+             var shown = !container.selectAll('.combobox').empty();
+             var tagName = input.node() ? input.node().tagName.toLowerCase() : '';
 
-             if (picon) {
-               // icon and label..
-               if (addIcon()) {
-                 addLabel(iconSize + padding);
-                 return p;
-               }
-             } else {
-               // label only..
-               if (addLabel(0)) {
-                 return p;
-               }
-             }
+             switch (d3_event.keyCode) {
+               case 8: // ⌫ Backspace
 
-             function addIcon() {
-               var iconX = centroid[0] - iconSize / 2;
-               var iconY = centroid[1] - iconSize / 2;
-               var bbox = {
-                 minX: iconX,
-                 minY: iconY,
-                 maxX: iconX + iconSize,
-                 maxY: iconY + iconSize
-               };
+               case 46:
+                 // ⌦ Delete
+                 d3_event.stopPropagation();
+                 _selected = null;
+                 render();
+                 input.on('input.combo-input', function () {
+                   var start = input.property('selectionStart');
+                   input.node().setSelectionRange(start, start);
+                   input.on('input.combo-input', change);
+                 });
+                 break;
 
-               if (tryInsert([bbox], entity.id + 'I', true)) {
-                 p.transform = 'translate(' + iconX + ',' + iconY + ')';
-                 return true;
-               }
+               case 9:
+                 // ⇥ Tab
+                 accept();
+                 break;
 
-               return false;
-             }
+               case 13:
+                 // ↩ Return
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation();
+                 break;
 
-             function addLabel(yOffset) {
-               if (width && areaWidth >= width + 20) {
-                 var labelX = centroid[0];
-                 var labelY = centroid[1] + yOffset;
-                 var bbox = {
-                   minX: labelX - width / 2 - padding,
-                   minY: labelY - height / 2 - padding,
-                   maxX: labelX + width / 2 + padding,
-                   maxY: labelY + height / 2 + padding
-                 };
+               case 38:
+                 // ↑ Up arrow
+                 if (tagName === 'textarea' && !shown) return;
+                 d3_event.preventDefault();
 
-                 if (tryInsert([bbox], entity.id, true)) {
-                   p.x = labelX;
-                   p.y = labelY;
-                   p.textAnchor = 'middle';
-                   p.height = height;
-                   return true;
+                 if (tagName === 'input' && !shown) {
+                   show();
                  }
-               }
 
-               return false;
-             }
-           } // force insert a singular bounding box
-           // singular box only, no array, id better be unique
+                 nav(-1);
+                 break;
 
+               case 40:
+                 // ↓ Down arrow
+                 if (tagName === 'textarea' && !shown) return;
+                 d3_event.preventDefault();
 
-           function doInsert(bbox, id) {
-             bbox.id = id;
-             var oldbox = _entitybboxes[id];
+                 if (tagName === 'input' && !shown) {
+                   show();
+                 }
 
-             if (oldbox) {
-               _rdrawn.remove(oldbox);
+                 nav(+1);
+                 break;
              }
-
-             _entitybboxes[id] = bbox;
-
-             _rdrawn.insert(bbox);
            }
 
-           function tryInsert(bboxes, id, saveSkipped) {
-             var skipped = false;
-
-             for (var i = 0; i < bboxes.length; i++) {
-               var bbox = bboxes[i];
-               bbox.id = id; // Check that label is visible
-
-               if (bbox.minX < 0 || bbox.minY < 0 || bbox.maxX > dimensions[0] || bbox.maxY > dimensions[1]) {
-                 skipped = true;
+           function keyup(d3_event) {
+             switch (d3_event.keyCode) {
+               case 27:
+                 // ⎋ Escape
+                 cancel();
                  break;
-               }
 
-               if (_rdrawn.collides(bbox)) {
-                 skipped = true;
+               case 13:
+                 // ↩ Return
+                 accept();
                  break;
-               }
              }
+           } // Called whenever the input value is changed (e.g. on typing)
 
-             _entitybboxes[id] = bboxes;
 
-             if (skipped) {
-               if (saveSkipped) {
-                 _rskipped.load(bboxes);
+           function change() {
+             fetchComboData(value(), function () {
+               _selected = null;
+               var val = input.property('value');
+
+               if (_suggestions.length) {
+                 if (input.property('selectionEnd') === val.length) {
+                   _selected = tryAutocomplete();
+                 }
+
+                 if (!_selected) {
+                   _selected = val;
+                 }
                }
-             } else {
-               _rdrawn.load(bboxes);
-             }
 
-             return !skipped;
-           }
+               if (val.length) {
+                 var combo = container.selectAll('.combobox');
 
-           var layer = selection.selectAll('.layer-osm.labels');
-           layer.selectAll('.labels-group').data(['halo', 'label', 'debug']).enter().append('g').attr('class', function (d) {
-             return 'labels-group ' + d;
-           });
-           var halo = layer.selectAll('.labels-group.halo');
-           var label = layer.selectAll('.labels-group.label');
-           var debug = layer.selectAll('.labels-group.debug'); // points
+                 if (combo.empty()) {
+                   show();
+                 }
+               } else {
+                 hide();
+               }
 
-           drawPointLabels(label, labelled.point, filter, 'pointlabel', positions.point);
-           drawPointLabels(halo, labelled.point, filter, 'pointlabel-halo', positions.point); // lines
+               render();
+             });
+           } // Called when the user presses up/down arrows to navigate the list
 
-           drawLinePaths(layer, labelled.line, filter, '', positions.line);
-           drawLineLabels(label, labelled.line, filter, 'linelabel', positions.line);
-           drawLineLabels(halo, labelled.line, filter, 'linelabel-halo', positions.line); // areas
 
-           drawAreaLabels(label, labelled.area, filter, 'arealabel', positions.area);
-           drawAreaLabels(halo, labelled.area, filter, 'arealabel-halo', positions.area);
-           drawAreaIcons(label, labelled.area, filter, 'areaicon', positions.area);
-           drawAreaIcons(halo, labelled.area, filter, 'areaicon-halo', positions.area); // debug
+           function nav(dir) {
+             if (_suggestions.length) {
+               // try to determine previously selected index..
+               var index = -1;
 
-           drawCollisionBoxes(debug, _rskipped, 'debug-skipped');
-           drawCollisionBoxes(debug, _rdrawn, 'debug-drawn');
-           layer.call(filterLabels);
-         }
+               for (var i = 0; i < _suggestions.length; i++) {
+                 if (_selected && _suggestions[i].value === _selected) {
+                   index = i;
+                   break;
+                 }
+               } // pick new _selected
 
-         function filterLabels(selection) {
-           var drawLayer = selection.selectAll('.layer-osm.labels');
-           var layers = drawLayer.selectAll('.labels-group.halo, .labels-group.label');
-           layers.selectAll('.nolabel').classed('nolabel', false);
-           var mouse = context.map().mouse();
-           var graph = context.graph();
-           var selectedIDs = context.selectedIDs();
-           var ids = [];
-           var pad, bbox; // hide labels near the mouse
 
-           if (mouse) {
-             pad = 20;
-             bbox = {
-               minX: mouse[0] - pad,
-               minY: mouse[1] - pad,
-               maxX: mouse[0] + pad,
-               maxY: mouse[1] + pad
-             };
+               index = Math.max(Math.min(index + dir, _suggestions.length - 1), 0);
+               _selected = _suggestions[index].value;
+               input.property('value', _selected);
+             }
 
-             var nearMouse = _rdrawn.search(bbox).map(function (entity) {
-               return entity.id;
-             });
+             render();
+             ensureVisible();
+           }
 
-             ids.push.apply(ids, nearMouse);
-           } // hide labels on selected nodes (they look weird when dragging / haloed)
+           function ensureVisible() {
+             var combo = container.selectAll('.combobox');
+             if (combo.empty()) return;
+             var containerRect = container.node().getBoundingClientRect();
+             var comboRect = combo.node().getBoundingClientRect();
 
+             if (comboRect.bottom > containerRect.bottom) {
+               var node = attachTo ? attachTo.node() : input.node();
+               node.scrollIntoView({
+                 behavior: 'instant',
+                 block: 'center'
+               });
+               render();
+             } // https://stackoverflow.com/questions/11039885/scrollintoview-causing-the-whole-page-to-move
 
-           for (var i = 0; i < selectedIDs.length; i++) {
-             var entity = graph.hasEntity(selectedIDs[i]);
 
-             if (entity && entity.type === 'node') {
-               ids.push(selectedIDs[i]);
+             var selected = combo.selectAll('.combobox-option.selected').node();
+
+             if (selected) {
+               selected.scrollIntoView({
+                 behavior: 'smooth',
+                 block: 'nearest'
+               });
              }
            }
 
-           layers.selectAll(utilEntitySelector(ids)).classed('nolabel', true); // draw the mouse bbox if debugging is on..
+           function value() {
+             var value = input.property('value');
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
 
-           var debug = selection.selectAll('.labels-group.debug');
-           var gj = [];
+             if (start && end) {
+               value = value.substring(0, start);
+             }
 
-           if (context.getDebug('collision')) {
-             gj = bbox ? [{
-               type: 'Polygon',
-               coordinates: [[[bbox.minX, bbox.minY], [bbox.maxX, bbox.minY], [bbox.maxX, bbox.maxY], [bbox.minX, bbox.maxY], [bbox.minX, bbox.minY]]]
-             }] : [];
+             return value;
            }
 
-           var box = debug.selectAll('.debug-mouse').data(gj); // exit
-
-           box.exit().remove(); // enter/update
+           function fetchComboData(v, cb) {
+             _cancelFetch = false;
 
-           box.enter().append('path').attr('class', 'debug debug-mouse yellow').merge(box).attr('d', d3_geoPath());
-         }
+             _fetcher.call(input, v, function (results) {
+               // already chose a value, don't overwrite or autocomplete it
+               if (_cancelFetch) return;
+               _suggestions = results;
+               results.forEach(function (d) {
+                 _fetched[d.value] = d;
+               });
 
-         var throttleFilterLabels = throttle(filterLabels, 100);
+               if (cb) {
+                 cb();
+               }
+             });
+           }
 
-         drawLabels.observe = function (selection) {
-           var listener = function listener() {
-             throttleFilterLabels(selection);
-           };
+           function tryAutocomplete() {
+             if (!_canAutocomplete) return;
+             var val = _caseSensitive ? value() : value().toLowerCase();
+             if (!val) return; // Don't autocomplete if user is typing a number - #4935
 
-           selection.on('mousemove.hidelabels', listener);
-           context.on('enter.hidelabels', listener);
-         };
+             if (!isNaN(parseFloat(val)) && isFinite(val)) return;
+             var bestIndex = -1;
 
-         drawLabels.off = function (selection) {
-           throttleFilterLabels.cancel();
-           selection.on('mousemove.hidelabels', null);
-           context.on('enter.hidelabels', null);
-         };
+             for (var i = 0; i < _suggestions.length; i++) {
+               var suggestion = _suggestions[i].value;
+               var compare = _caseSensitive ? suggestion : suggestion.toLowerCase(); // if search string matches suggestion exactly, pick it..
 
-         return drawLabels;
-       }
+               if (compare === val) {
+                 bestIndex = i;
+                 break; // otherwise lock in the first result that starts with the search string..
+               } else if (bestIndex === -1 && compare.indexOf(val) === 0) {
+                 bestIndex = i;
+               }
+             }
 
-       var _layerEnabled$1 = false;
+             if (bestIndex !== -1) {
+               var bestVal = _suggestions[bestIndex].value;
+               input.property('value', bestVal);
+               input.node().setSelectionRange(val.length, bestVal.length);
+               return bestVal;
+             }
+           }
 
-       var _qaService$1;
+           function render() {
+             if (_suggestions.length < _minItems || document.activeElement !== input.node()) {
+               hide();
+               return;
+             }
 
-       function svgImproveOSM(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           return dispatch.call('change');
-         }, 1000);
+             var shown = !container.selectAll('.combobox').empty();
+             if (!shown) return;
+             var combo = container.selectAll('.combobox');
+             var options = combo.selectAll('.combobox-option').data(_suggestions, function (d) {
+               return d.value;
+             });
+             options.exit().remove(); // enter/update
 
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+             options.enter().append('a').attr('class', function (d) {
+               return 'combobox-option ' + (d.klass || '');
+             }).attr('title', function (d) {
+               return d.title;
+             }).html(function (d) {
+               return d.display || d.value;
+             }).on('mouseenter', _mouseEnterHandler).on('mouseleave', _mouseLeaveHandler).merge(options).classed('selected', function (d) {
+               return d.value === _selected;
+             }).on('click.combo-option', accept).order();
+             var node = attachTo ? attachTo.node() : input.node();
+             var containerRect = container.node().getBoundingClientRect();
+             var rect = node.getBoundingClientRect();
+             combo.style('left', rect.left + 5 - containerRect.left + 'px').style('width', rect.width - 10 + 'px').style('top', rect.height + rect.top - containerRect.top + 'px');
+           } // Dispatches an 'accept' event
+           // Then hides the combobox.
 
-         function markerPath(selection, klass) {
-           selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-         } // Loosely-coupled improveOSM service for fetching issues
 
+           function accept(d3_event, d) {
+             _cancelFetch = true;
+             var thiz = input.node();
 
-         function getService() {
-           if (services.improveOSM && !_qaService$1) {
-             _qaService$1 = services.improveOSM;
+             if (d) {
+               // user clicked on a suggestion
+               utilGetSetValue(input, d.value); // replace field contents
 
-             _qaService$1.on('loaded', throttledRedraw);
-           } else if (!services.improveOSM && _qaService$1) {
-             _qaService$1 = null;
-           }
+               utilTriggerEvent(input, 'change');
+             } // clear (and keep) selection
 
-           return _qaService$1;
-         } // Show the markers
 
+             var val = utilGetSetValue(input);
+             thiz.setSelectionRange(val.length, val.length);
+             d = _fetched[val];
+             dispatch.call('accept', thiz, d, val);
+             hide();
+           } // Dispatches an 'cancel' event
+           // Then hides the combobox.
 
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer.style('display', 'block');
-           }
-         } // Immediately remove the markers and their touch targets
 
+           function cancel() {
+             _cancelFetch = true;
+             var thiz = input.node(); // clear (and remove) selection, and replace field contents
 
-         function editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer.style('display', 'none');
-             drawLayer.selectAll('.qaItem.improveOSM').remove();
-             touchLayer.selectAll('.qaItem.improveOSM').remove();
+             var val = utilGetSetValue(input);
+             var start = input.property('selectionStart');
+             var end = input.property('selectionEnd');
+             val = val.slice(0, start) + val.slice(end);
+             utilGetSetValue(input, val);
+             thiz.setSelectionRange(val.length, val.length);
+             dispatch.call('cancel', thiz);
+             hide();
            }
-         } // Enable the layer.  This shows the markers and transitions them to visible.
+         };
 
+         combobox.canAutocomplete = function (val) {
+           if (!arguments.length) return _canAutocomplete;
+           _canAutocomplete = val;
+           return combobox;
+         };
 
-         function layerOn() {
-           editOn();
-           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-             return dispatch.call('change');
-           });
-         } // Disable the layer.  This transitions the layer invisible and then hides the markers.
+         combobox.caseSensitive = function (val) {
+           if (!arguments.length) return _caseSensitive;
+           _caseSensitive = val;
+           return combobox;
+         };
 
+         combobox.data = function (val) {
+           if (!arguments.length) return _data;
+           _data = val;
+           return combobox;
+         };
 
-         function layerOff() {
-           throttledRedraw.cancel();
-           drawLayer.interrupt();
-           touchLayer.selectAll('.qaItem.improveOSM').remove();
-           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
-             editOff();
-             dispatch.call('change');
-           });
-         } // Update the issue markers
+         combobox.fetcher = function (val) {
+           if (!arguments.length) return _fetcher;
+           _fetcher = val;
+           return combobox;
+         };
 
+         combobox.minItems = function (val) {
+           if (!arguments.length) return _minItems;
+           _minItems = val;
+           return combobox;
+         };
 
-         function updateMarkers() {
-           if (!layerVisible || !_layerEnabled$1) return;
-           var service = getService();
-           var selectedID = context.selectedErrorID();
-           var data = service ? service.getItems(projection) : [];
-           var getTransform = svgPointTransform(projection); // Draw markers..
+         combobox.itemsMouseEnter = function (val) {
+           if (!arguments.length) return _mouseEnterHandler;
+           _mouseEnterHandler = val;
+           return combobox;
+         };
 
-           var markers = drawLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
-             return d.id;
-           }); // exit
+         combobox.itemsMouseLeave = function (val) {
+           if (!arguments.length) return _mouseLeaveHandler;
+           _mouseLeaveHandler = val;
+           return combobox;
+         };
 
-           markers.exit().remove(); // enter
+         return utilRebind(combobox, dispatch, 'on');
+       }
 
-           var markersEnter = markers.enter().append('g').attr('class', function (d) {
-             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
-           });
-           markersEnter.append('polygon').call(markerPath, 'shadow');
-           markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
-           markersEnter.append('polygon').attr('fill', 'currentColor').call(markerPath, 'qaItem-fill');
-           markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
-             var picon = d.icon;
+       uiCombobox.off = function (input, context) {
+         input.on('focus.combo-input', null).on('blur.combo-input', null).on('keydown.combo-input', null).on('keyup.combo-input', null).on('input.combo-input', null).on('mousedown.combo-input', null).on('mouseup.combo-input', null);
+         context.container().on('scroll.combo-scroll', null);
+       };
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return "#".concat(picon).concat(isMaki ? '-11' : '');
-             }
-           }); // update
+       function uiDisclosure(context, key, expandedDefault) {
+         var dispatch = dispatch$8('toggled');
 
-           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
-             return d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+         var _expanded;
 
-           if (touchLayer.empty()) return;
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var targets = touchLayer.selectAll('.qaItem.improveOSM').data(data, function (d) {
-             return d.id;
-           }); // exit
+         var _label = utilFunctor('');
 
-           targets.exit().remove(); // enter/update
+         var _updatePreference = true;
 
-           targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
-             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
-           }).attr('transform', getTransform);
+         var _content = function _content() {};
 
-           function sortY(a, b) {
-             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
+         var disclosure = function disclosure(selection) {
+           if (_expanded === undefined || _expanded === null) {
+             // loading _expanded here allows it to be reset by calling `disclosure.expanded(null)`
+             var preference = corePreferences('disclosure.' + key + '.expanded');
+             _expanded = preference === null ? !!expandedDefault : preference === 'true';
            }
-         } // Draw the ImproveOSM layer and schedule loading issues and updating markers.
 
+           var hideToggle = selection.selectAll('.hide-toggle-' + key).data([0]); // enter
 
-         function drawImproveOSM(selection) {
-           var service = getService();
-           var surface = context.surface();
+           var hideToggleEnter = hideToggle.enter().append('h3').append('a').attr('role', 'button').attr('href', '#').attr('class', 'hide-toggle hide-toggle-' + key).call(svgIcon('', 'pre-text', 'hide-toggle-icon'));
+           hideToggleEnter.append('span').attr('class', 'hide-toggle-text'); // update
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-           }
+           hideToggle = hideToggleEnter.merge(hideToggle);
+           hideToggle.on('click', toggle).attr('title', _t("icons.".concat(_expanded ? 'collapse' : 'expand'))).attr('aria-expanded', _expanded).classed('expanded', _expanded);
+           hideToggle.selectAll('.hide-toggle-text').html(_label());
+           hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+           var wrap = selection.selectAll('.disclosure-wrap').data([0]); // enter/update
 
-           drawLayer = selection.selectAll('.layer-improveOSM').data(service ? [0] : []);
-           drawLayer.exit().remove();
-           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-improveOSM').style('display', _layerEnabled$1 ? 'block' : 'none').merge(drawLayer);
+           wrap = wrap.enter().append('div').attr('class', 'disclosure-wrap disclosure-wrap-' + key).merge(wrap).classed('hide', !_expanded);
 
-           if (_layerEnabled$1) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
-             } else {
-               editOff();
-             }
+           if (_expanded) {
+             wrap.call(_content);
            }
-         } // Toggles the layer on and off
 
+           function toggle(d3_event) {
+             d3_event.preventDefault();
+             _expanded = !_expanded;
 
-         drawImproveOSM.enabled = function (val) {
-           if (!arguments.length) return _layerEnabled$1;
-           _layerEnabled$1 = val;
+             if (_updatePreference) {
+               corePreferences('disclosure.' + key + '.expanded', _expanded);
+             }
 
-           if (_layerEnabled$1) {
-             layerOn();
-           } else {
-             layerOff();
+             hideToggle.classed('expanded', _expanded).attr('aria-expanded', _expanded).attr('title', _t("icons.".concat(_expanded ? 'collapse' : 'expand')));
+             hideToggle.selectAll('.hide-toggle-icon').attr('xlink:href', _expanded ? '#iD-icon-down' : _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward');
+             wrap.call(uiToggle(_expanded));
 
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
+             if (_expanded) {
+               wrap.call(_content);
              }
-           }
 
-           dispatch.call('change');
-           return this;
+             dispatch.call('toggled', this, _expanded);
+           }
          };
 
-         drawImproveOSM.supported = function () {
-           return !!getService();
+         disclosure.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = utilFunctor(val);
+           return disclosure;
          };
 
-         return drawImproveOSM;
-       }
+         disclosure.expanded = function (val) {
+           if (!arguments.length) return _expanded;
+           _expanded = val;
+           return disclosure;
+         };
 
-       var _layerEnabled$2 = false;
+         disclosure.updatePreference = function (val) {
+           if (!arguments.length) return _updatePreference;
+           _updatePreference = val;
+           return disclosure;
+         };
 
-       var _qaService$2;
+         disclosure.content = function (val) {
+           if (!arguments.length) return _content;
+           _content = val;
+           return disclosure;
+         };
 
-       function svgOsmose(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           return dispatch.call('change');
-         }, 1000);
+         return utilRebind(disclosure, dispatch, 'on');
+       }
 
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var layerVisible = false;
+       // Can be labeled and collapsible.
 
-         function markerPath(selection, klass) {
-           selection.attr('class', klass).attr('transform', 'translate(-10, -28)').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
-         } // Loosely-coupled osmose service for fetching issues
+       function uiSection(id, context) {
+         var _classes = utilFunctor('');
 
+         var _shouldDisplay;
 
-         function getService() {
-           if (services.osmose && !_qaService$2) {
-             _qaService$2 = services.osmose;
+         var _content;
 
-             _qaService$2.on('loaded', throttledRedraw);
-           } else if (!services.osmose && _qaService$2) {
-             _qaService$2 = null;
-           }
+         var _disclosure;
 
-           return _qaService$2;
-         } // Show the markers
+         var _label;
 
+         var _expandedByDefault = utilFunctor(true);
 
-         function editOn() {
-           if (!layerVisible) {
-             layerVisible = true;
-             drawLayer.style('display', 'block');
-           }
-         } // Immediately remove the markers and their touch targets
+         var _disclosureContent;
 
+         var _disclosureExpanded;
 
-         function editOff() {
-           if (layerVisible) {
-             layerVisible = false;
-             drawLayer.style('display', 'none');
-             drawLayer.selectAll('.qaItem.osmose').remove();
-             touchLayer.selectAll('.qaItem.osmose').remove();
-           }
-         } // Enable the layer.  This shows the markers and transitions them to visible.
+         var _containerSelection = select(null);
 
+         var section = {
+           id: id
+         };
 
-         function layerOn() {
-           editOn();
-           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-             return dispatch.call('change');
-           });
-         } // Disable the layer.  This transitions the layer invisible and then hides the markers.
+         section.classes = function (val) {
+           if (!arguments.length) return _classes;
+           _classes = utilFunctor(val);
+           return section;
+         };
 
+         section.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = utilFunctor(val);
+           return section;
+         };
 
-         function layerOff() {
-           throttledRedraw.cancel();
-           drawLayer.interrupt();
-           touchLayer.selectAll('.qaItem.osmose').remove();
-           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
-             editOff();
-             dispatch.call('change');
-           });
-         } // Update the issue markers
+         section.expandedByDefault = function (val) {
+           if (!arguments.length) return _expandedByDefault;
+           _expandedByDefault = utilFunctor(val);
+           return section;
+         };
 
+         section.shouldDisplay = function (val) {
+           if (!arguments.length) return _shouldDisplay;
+           _shouldDisplay = utilFunctor(val);
+           return section;
+         };
 
-         function updateMarkers() {
-           if (!layerVisible || !_layerEnabled$2) return;
-           var service = getService();
-           var selectedID = context.selectedErrorID();
-           var data = service ? service.getItems(projection) : [];
-           var getTransform = svgPointTransform(projection); // Draw markers..
+         section.content = function (val) {
+           if (!arguments.length) return _content;
+           _content = val;
+           return section;
+         };
 
-           var markers = drawLayer.selectAll('.qaItem.osmose').data(data, function (d) {
-             return d.id;
-           }); // exit
+         section.disclosureContent = function (val) {
+           if (!arguments.length) return _disclosureContent;
+           _disclosureContent = val;
+           return section;
+         };
 
-           markers.exit().remove(); // enter
+         section.disclosureExpanded = function (val) {
+           if (!arguments.length) return _disclosureExpanded;
+           _disclosureExpanded = val;
+           return section;
+         }; // may be called multiple times
 
-           var markersEnter = markers.enter().append('g').attr('class', function (d) {
-             return "qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
-           });
-           markersEnter.append('polygon').call(markerPath, 'shadow');
-           markersEnter.append('ellipse').attr('cx', 0).attr('cy', 0).attr('rx', 4.5).attr('ry', 2).attr('class', 'stroke');
-           markersEnter.append('polygon').attr('fill', function (d) {
-             return service.getColor(d.item);
-           }).call(markerPath, 'qaItem-fill');
-           markersEnter.append('use').attr('transform', 'translate(-6.5, -23)').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('xlink:href', function (d) {
-             var picon = d.icon;
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return "#".concat(picon).concat(isMaki ? '-11' : '');
-             }
-           }); // update
+         section.render = function (selection) {
+           _containerSelection = selection.selectAll('.section-' + id).data([0]);
 
-           markers.merge(markersEnter).sort(sortY).classed('selected', function (d) {
-             return d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+           var sectionEnter = _containerSelection.enter().append('div').attr('class', 'section section-' + id + ' ' + (_classes && _classes() || ''));
 
-           if (touchLayer.empty()) return;
-           var fillClass = context.getDebug('target') ? 'pink' : 'nocolor';
-           var targets = touchLayer.selectAll('.qaItem.osmose').data(data, function (d) {
-             return d.id;
-           }); // exit
+           _containerSelection = sectionEnter.merge(_containerSelection);
 
-           targets.exit().remove(); // enter/update
+           _containerSelection.call(renderContent);
+         };
 
-           targets.enter().append('rect').attr('width', '20px').attr('height', '30px').attr('x', '-10px').attr('y', '-28px').merge(targets).sort(sortY).attr('class', function (d) {
-             return "qaItem ".concat(d.service, " target ").concat(fillClass, " itemId-").concat(d.id);
-           }).attr('transform', getTransform);
+         section.reRender = function () {
+           _containerSelection.call(renderContent);
+         };
 
-           function sortY(a, b) {
-             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
-           }
-         } // Draw the Osmose layer and schedule loading issues and updating markers.
+         section.selection = function () {
+           return _containerSelection;
+         };
 
+         section.disclosure = function () {
+           return _disclosure;
+         }; // may be called multiple times
 
-         function drawOsmose(selection) {
-           var service = getService();
-           var surface = context.surface();
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-           }
+         function renderContent(selection) {
+           if (_shouldDisplay) {
+             var shouldDisplay = _shouldDisplay();
 
-           drawLayer = selection.selectAll('.layer-osmose').data(service ? [0] : []);
-           drawLayer.exit().remove();
-           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-osmose').style('display', _layerEnabled$2 ? 'block' : 'none').merge(drawLayer);
+             selection.classed('hide', !shouldDisplay);
 
-           if (_layerEnabled$2) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadIssues(projection);
-               updateMarkers();
-             } else {
-               editOff();
+             if (!shouldDisplay) {
+               selection.html('');
+               return;
              }
            }
-         } // Toggles the layer on and off
 
+           if (_disclosureContent) {
+             if (!_disclosure) {
+               _disclosure = uiDisclosure(context, id.replace(/-/g, '_'), _expandedByDefault()).label(_label || '')
+               /*.on('toggled', function(expanded) {
+                   if (expanded) { selection.node().parentNode.scrollTop += 200; }
+               })*/
+               .content(_disclosureContent);
+             }
 
-         drawOsmose.enabled = function (val) {
-           if (!arguments.length) return _layerEnabled$2;
-           _layerEnabled$2 = val;
-
-           if (_layerEnabled$2) {
-             // Strings supplied by Osmose fetched before showing layer for first time
-             // NOTE: Currently no way to change locale in iD at runtime, would need to re-call this method if that's ever implemented
-             // Also, If layer is toggled quickly multiple requests are sent
-             getService().loadStrings().then(layerOn)["catch"](function (err) {
-               console.log(err); // eslint-disable-line no-console
-             });
-           } else {
-             layerOff();
+             if (_disclosureExpanded !== undefined) {
+               _disclosure.expanded(_disclosureExpanded);
 
-             if (context.selectedErrorID()) {
-               context.enter(modeBrowse(context));
+               _disclosureExpanded = undefined;
              }
-           }
 
-           dispatch.call('change');
-           return this;
-         };
+             selection.call(_disclosure);
+             return;
+           }
 
-         drawOsmose.supported = function () {
-           return !!getService();
-         };
+           if (_content) {
+             selection.call(_content);
+           }
+         }
 
-         return drawOsmose;
+         return section;
        }
 
-       function svgStreetside(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+       // {
+       //   key: 'string',     // required
+       //   value: 'string'    // optional
+       // }
+       //   -or-
+       // {
+       //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+       // }
+       //
 
-         var minZoom = 14;
-         var minMarkerZoom = 16;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
-         var _viewerYaw = 0;
-         var _selectedSequence = null;
+       function uiTagReference(what) {
+         var wikibase = what.qid ? services.wikidata : services.osmWikibase;
+         var tagReference = {};
 
-         var _streetside;
-         /**
-          * init().
-          */
+         var _button = select(null);
 
+         var _body = select(null);
 
-         function init() {
-           if (svgStreetside.initialized) return; // run once
+         var _loaded;
 
-           svgStreetside.enabled = false;
-           svgStreetside.initialized = true;
+         var _showing;
+
+         function load() {
+           if (!wikibase) return;
+
+           _button.classed('tag-reference-loading', true);
+
+           wikibase.getDocs(what, gotDocs);
          }
-         /**
-          * getService().
-          */
 
+         function gotDocs(err, docs) {
+           _body.html('');
 
-         function getService() {
-           if (services.streetside && !_streetside) {
-             _streetside = services.streetside;
+           if (!docs || !docs.title) {
+             _body.append('p').attr('class', 'tag-reference-description').call(_t.append('inspector.no_documentation_key'));
 
-             _streetside.event.on('viewerChanged.svgStreetside', viewerChanged).on('loadedImages.svgStreetside', throttledRedraw);
-           } else if (!services.streetside && _streetside) {
-             _streetside = null;
+             done();
+             return;
            }
 
-           return _streetside;
-         }
-         /**
-          * showLayer().
-          */
+           if (docs.imageURL) {
+             _body.append('img').attr('class', 'tag-reference-wiki-image').attr('alt', docs.description).attr('src', docs.imageURL).on('load', function () {
+               done();
+             }).on('error', function () {
+               select(this).remove();
+               done();
+             });
+           } else {
+             done();
+           }
 
+           var tagReferenceDescription = _body.append('p').attr('class', 'tag-reference-description').append('span');
 
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           editOn();
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
-             dispatch.call('change');
-           });
-         }
-         /**
-          * hideLayer().
-          */
+           if (docs.description) {
+             tagReferenceDescription = tagReferenceDescription.attr('class', 'localized-text').attr('lang', docs.descriptionLocaleCode || 'und').text(docs.description);
+           } else {
+             tagReferenceDescription = tagReferenceDescription.call(_t.append('inspector.no_documentation_key'));
+           }
 
+           tagReferenceDescription.append('a').attr('class', 'tag-reference-edit').attr('target', '_blank').attr('title', _t('inspector.edit_reference')).attr('href', docs.editURL).call(svgIcon('#iD-icon-edit', 'inline'));
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-         }
-         /**
-          * editOn().
-          */
+           if (docs.wiki) {
+             _body.append('a').attr('class', 'tag-reference-link').attr('target', '_blank').attr('href', docs.wiki.url).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append(docs.wiki.text));
+           } // Add link to info about "good changeset comments" - #2923
 
 
-         function editOn() {
-           layer.style('display', 'block');
+           if (what.key === 'comment') {
+             _body.append('a').attr('class', 'tag-reference-comment-link').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', _t('commit.about_changeset_comments_link')).append('span').call(_t.append('commit.about_changeset_comments'));
+           }
          }
-         /**
-          * editOff().
-          */
 
+         function done() {
+           _loaded = true;
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
-         }
-         /**
-          * click() Handles 'bubble' point click event.
-          */
+           _button.classed('tag-reference-loading', false);
 
+           _body.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1');
 
-         function click(d3_event, d) {
-           var service = getService();
-           if (!service) return; // try to preserve the viewer rotation when staying on the same sequence
+           _showing = true;
 
-           if (d.sequenceKey !== _selectedSequence) {
-             _viewerYaw = 0; // reset
-           }
+           _button.selectAll('svg.icon use').each(function () {
+             var iconUse = select(this);
 
-           _selectedSequence = d.sequenceKey;
-           service.ensureViewerLoaded(context).then(function () {
-             service.selectImage(context, d.key).yaw(_viewerYaw).showViewer(context);
+             if (iconUse.attr('href') === '#iD-icon-info') {
+               iconUse.attr('href', '#iD-icon-info-filled');
+             }
            });
-           context.map().centerEase(d.loc);
          }
-         /**
-          * mouseover().
-          */
 
+         function hide() {
+           _body.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+             _body.classed('expanded', false);
+           });
 
-         function mouseover(d3_event, d) {
-           var service = getService();
-           if (service) service.setStyles(context, d);
-         }
-         /**
-          * mouseout().
-          */
+           _showing = false;
 
+           _button.selectAll('svg.icon use').each(function () {
+             var iconUse = select(this);
 
-         function mouseout() {
-           var service = getService();
-           if (service) service.setStyles(context, null);
+             if (iconUse.attr('href') === '#iD-icon-info-filled') {
+               iconUse.attr('href', '#iD-icon-info');
+             }
+           });
          }
-         /**
-          * transform().
-          */
 
+         tagReference.button = function (selection, klass, iconName) {
+           _button = selection.selectAll('.tag-reference-button').data([0]);
+           _button = _button.enter().append('button').attr('class', 'tag-reference-button ' + (klass || '')).attr('title', _t('icons.information')).call(svgIcon('#iD-icon-' + (iconName || 'inspect'))).merge(_button);
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
-           var rot = d.ca + _viewerYaw;
+           _button.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             this.blur(); // avoid keeping focus on the button - #4641
 
-           if (rot) {
-             t += ' rotate(' + Math.floor(rot) + ',0,0)';
-           }
+             if (_showing) {
+               hide();
+             } else if (_loaded) {
+               done();
+             } else {
+               load();
+             }
+           });
+         };
 
-           return t;
-         }
+         tagReference.body = function (selection) {
+           var itemID = what.qid || what.key + '-' + (what.value || '');
+           _body = selection.selectAll('.tag-reference-body').data([itemID], function (d) {
+             return d;
+           });
 
-         function viewerChanged() {
-           var service = getService();
-           if (!service) return;
-           var viewer = service.viewer();
-           if (!viewer) return; // update viewfield rotation
+           _body.exit().remove();
 
-           _viewerYaw = viewer.getYaw(); // avoid updating if the map is currently transformed
-           // e.g. during drags or easing.
+           _body = _body.enter().append('div').attr('class', 'tag-reference-body').style('max-height', '0').style('opacity', '0').merge(_body);
 
-           if (context.map().isTransformed()) return;
-           layer.selectAll('.viewfield-group.currentView').attr('transform', transform);
-         }
+           if (_showing === false) {
+             hide();
+           }
+         };
 
-         function filterBubbles(bubbles) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+         tagReference.showing = function (val) {
+           if (!arguments.length) return _showing;
+           _showing = val;
+           return tagReference;
+         };
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             bubbles = bubbles.filter(function (bubble) {
-               return new Date(bubble.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+         return tagReference;
+       }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             bubbles = bubbles.filter(function (bubble) {
-               return new Date(bubble.captured_at).getTime() <= toTimestamp;
-             });
-           }
+       // It borrows some code from uiHelp
 
-           if (usernames) {
-             bubbles = bubbles.filter(function (bubble) {
-               return usernames.indexOf(bubble.captured_by) !== -1;
-             });
-           }
+       function uiFieldHelp(context, fieldName) {
+         var fieldHelp = {};
 
-           return bubbles;
-         }
+         var _inspector = select(null);
 
-         function filterSequences(sequences) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+         var _wrap = select(null);
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             sequences = sequences.filter(function (sequences) {
-               return new Date(sequences.properties.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+         var _body = select(null);
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             sequences = sequences.filter(function (sequences) {
-               return new Date(sequences.properties.captured_at).getTime() <= toTimestamp;
-             });
+         var fieldHelpKeys = {
+           restrictions: [['about', ['about', 'from_via_to', 'maxdist', 'maxvia']], ['inspecting', ['about', 'from_shadow', 'allow_shadow', 'restrict_shadow', 'only_shadow', 'restricted', 'only']], ['modifying', ['about', 'indicators', 'allow_turn', 'restrict_turn', 'only_turn']], ['tips', ['simple', 'simple_example', 'indirect', 'indirect_example', 'indirect_noedit']]]
+         };
+         var fieldHelpHeadings = {};
+         var replacements = {
+           distField: {
+             html: _t.html('restriction.controls.distance')
+           },
+           viaField: {
+             html: _t.html('restriction.controls.via')
+           },
+           fromShadow: {
+             html: icon('#iD-turn-shadow', 'inline shadow from')
+           },
+           allowShadow: {
+             html: icon('#iD-turn-shadow', 'inline shadow allow')
+           },
+           restrictShadow: {
+             html: icon('#iD-turn-shadow', 'inline shadow restrict')
+           },
+           onlyShadow: {
+             html: icon('#iD-turn-shadow', 'inline shadow only')
+           },
+           allowTurn: {
+             html: icon('#iD-turn-yes', 'inline turn')
+           },
+           restrictTurn: {
+             html: icon('#iD-turn-no', 'inline turn')
+           },
+           onlyTurn: {
+             html: icon('#iD-turn-only', 'inline turn')
            }
+         }; // For each section, squash all the texts into a single markdown document
 
-           if (usernames) {
-             sequences = sequences.filter(function (sequences) {
-               return usernames.indexOf(sequences.properties.captured_by) !== -1;
-             });
-           }
+         var docs = fieldHelpKeys[fieldName].map(function (key) {
+           var helpkey = 'help.field.' + fieldName + '.' + key[0];
+           var text = key[1].reduce(function (all, part) {
+             var subkey = helpkey + '.' + part;
+             var depth = fieldHelpHeadings[subkey]; // is this subkey a heading?
 
-           return sequences;
-         }
-         /**
-          * update().
-          */
+             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
+             return all + hhh + _t.html(subkey, replacements) + '\n\n';
+           }, '');
+           return {
+             key: helpkey,
+             title: _t.html(helpkey + '.title'),
+             html: marked_1(text.trim())
+           };
+         });
 
-         function update() {
-           var viewer = context.container().select('.photoviewer');
-           var selected = viewer.empty() ? undefined : viewer.datum();
-           var z = ~~context.map().zoom();
-           var showMarkers = z >= minMarkerZoom;
-           var showViewfields = z >= minViewfieldZoom;
-           var service = getService();
-           var sequences = [];
-           var bubbles = [];
+         function show() {
+           updatePosition();
 
-           if (context.photos().showsPanoramic()) {
-             sequences = service ? service.sequences(projection) : [];
-             bubbles = service && showMarkers ? service.bubbles(projection) : [];
-             sequences = filterSequences(sequences);
-             bubbles = filterBubbles(bubbles);
-           }
+           _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
+         }
 
-           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-             return d.properties.key;
-           }); // exit
+         function hide() {
+           _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
+             _body.classed('hide', true);
+           });
+         }
 
-           traces.exit().remove(); // enter/update
+         function clickHelp(index) {
+           var d = docs[index];
+           var tkeys = fieldHelpKeys[fieldName][index][1];
 
-           traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
-           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(bubbles, function (d) {
-             // force reenter once bubbles are attached to a sequence
-             return d.key + (d.sequenceKey ? 'v1' : 'v0');
-           }); // exit
+           _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
+             return i === index;
+           });
 
-           groups.exit().remove(); // enter
+           var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
 
-           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
-           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
 
-           var markers = groups.merge(groupsEnter).sort(function (a, b) {
-             return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1];
-           }).attr('transform', transform).select('.viewfield-scale');
-           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
-           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
-           viewfields.exit().remove(); // viewfields may or may not be drawn...
-           // but if they are, draw below the circles
+           content.selectAll('p').attr('class', function (d, i) {
+             return tkeys[i];
+           }); // insert special content for certain help sections
 
-           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+           if (d.key === 'help.field.restrictions.inspecting') {
+             content.insert('img', 'p.from_shadow').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_inspect.gif'));
+           } else if (d.key === 'help.field.restrictions.modifying') {
+             content.insert('img', 'p.allow_turn').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_modify.gif'));
+           }
+         }
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+         fieldHelp.button = function (selection) {
+           if (_body.empty()) return;
+           var button = selection.selectAll('.field-help-button').data([0]); // enter/update
 
-             if (d.pano) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+           button.enter().append('button').attr('class', 'field-help-button').call(svgIcon('#iD-icon-help')).merge(button).on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+
+             if (_body.classed('hide')) {
+               show();
              } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+               hide();
              }
-           }
-         }
-         /**
-          * drawImages()
-          * drawImages is the method that is returned (and that runs) every time 'svgStreetside()' is called.
-          * 'svgStreetside()' is called from index.js
-          */
+           });
+         };
 
+         function updatePosition() {
+           var wrap = _wrap.node();
 
-         function drawImages(selection) {
-           var enabled = svgStreetside.enabled;
-           var service = getService();
-           layer = selection.selectAll('.layer-streetside-images').data(service ? [0] : []);
-           layer.exit().remove();
-           var layerEnter = layer.enter().append('g').attr('class', 'layer-streetside-images').style('display', enabled ? 'block' : 'none');
-           layerEnter.append('g').attr('class', 'sequences');
-           layerEnter.append('g').attr('class', 'markers');
-           layer = layerEnter.merge(layer);
+           var inspector = _inspector.node();
+
+           var wRect = wrap.getBoundingClientRect();
+           var iRect = inspector.getBoundingClientRect();
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadBubbles(projection);
-             } else {
-               editOff();
-             }
-           }
+           _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
          }
-         /**
-          * drawImages.enabled().
-          */
 
+         fieldHelp.body = function (selection) {
+           // This control expects the field to have a form-field-input-wrap div
+           _wrap = selection.selectAll('.form-field-input-wrap');
+           if (_wrap.empty()) return; // absolute position relative to the inspector, so it "floats" above the fields
 
-         drawImages.enabled = function (_) {
-           if (!arguments.length) return svgStreetside.enabled;
-           svgStreetside.enabled = _;
-
-           if (svgStreetside.enabled) {
-             showLayer();
-             context.photos().on('change.streetside', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.streetside', null);
-           }
+           _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
+           if (_inspector.empty()) return;
+           _body = _inspector.selectAll('.field-help-body').data([0]);
 
-           dispatch.call('change');
-           return this;
-         };
-         /**
-          * drawImages.supported().
-          */
+           var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
 
 
-         drawImages.supported = function () {
-           return !!getService();
+           var titleEnter = enter.append('div').attr('class', 'field-help-title cf');
+           titleEnter.append('h2').attr('class', _mainLocalizer.textDirection() === 'rtl' ? 'fr' : 'fl').call(_t.append('help.field.' + fieldName + '.title'));
+           titleEnter.append('button').attr('class', 'fr close').attr('title', _t('icons.close')).on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             hide();
+           }).call(svgIcon('#iD-icon-close'));
+           var navEnter = enter.append('div').attr('class', 'field-help-nav cf');
+           var titles = docs.map(function (d) {
+             return d.title;
+           });
+           navEnter.selectAll('.field-help-nav-item').data(titles).enter().append('div').attr('class', 'field-help-nav-item').html(function (d) {
+             return d;
+           }).on('click', function (d3_event, d) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             clickHelp(titles.indexOf(d));
+           });
+           enter.append('div').attr('class', 'field-help-content');
+           _body = _body.merge(enter);
+           clickHelp(0);
          };
 
-         init();
-         return drawImages;
+         return fieldHelp;
        }
 
-       function svgMapillaryImages(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+       function uiFieldCheck(field, context) {
+         var dispatch = dispatch$8('change');
+         var options = field.options;
+         var values = [];
+         var texts = [];
 
-         var minZoom = 12;
-         var minMarkerZoom = 16;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
+         var _tags;
 
-         var _mapillary;
+         var input = select(null);
+         var text = select(null);
+         var label = select(null);
+         var reverser = select(null);
 
-         var viewerCompassAngle;
+         var _impliedYes;
 
-         function init() {
-           if (svgMapillaryImages.initialized) return; // run once
+         var _entityIDs = [];
 
-           svgMapillaryImages.enabled = false;
-           svgMapillaryImages.initialized = true;
-         }
+         var _value;
 
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
+         if (options) {
+           for (var i in options) {
+             var v = options[i];
+             values.push(v === 'undefined' ? undefined : v);
+             texts.push(field.t.html('options.' + v, {
+               'default': v
+             }));
+           }
+         } else {
+           values = [undefined, 'yes'];
+           texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];
 
-             _mapillary.event.on('loadedImages', throttledRedraw);
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
+           if (field.type !== 'defaultCheck') {
+             values.push('no');
+             texts.push(_t.html('inspector.check.no'));
            }
+         } // Checks tags to see whether an undefined value is "Assumed to be Yes"
 
-           return _mapillary;
-         }
 
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           editOn();
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
-             dispatch.call('change');
-           });
-         }
+         function checkImpliedYes() {
+           _impliedYes = field.id === 'oneway_yes'; // hack: pretend `oneway` field is a `oneway_yes` field
+           // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-         }
+           if (field.id === 'oneway') {
+             var entity = context.entity(_entityIDs[0]);
 
-         function editOn() {
-           layer.style('display', 'block');
+             for (var key in entity.tags) {
+               if (key in osmOneWayTags && entity.tags[key] in osmOneWayTags[key]) {
+                 _impliedYes = true;
+                 texts[0] = _t.html('_tagging.presets.fields.oneway_yes.options.undefined');
+                 break;
+               }
+             }
+           }
          }
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
+         function reverserHidden() {
+           if (!context.container().select('div.inspector-hover').empty()) return true;
+           return !(_value === 'yes' || _impliedYes && !_value);
          }
 
-         function click(d3_event, d) {
-           var service = getService();
-           if (!service) return;
-           service.ensureViewerLoaded(context).then(function () {
-             service.selectImage(context, d.key).showViewer(context);
-           });
-           context.map().centerEase(d.loc);
+         function reverserSetText(selection) {
+           var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
+           if (reverserHidden() || !entity) return selection;
+           var first = entity.first();
+           var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
+           var pseudoDirection = first < last;
+           var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
+           selection.selectAll('.reverser-span').html('').call(_t.append('inspector.check.reverser')).call(svgIcon(icon, 'inline'));
+           return selection;
          }
 
-         function mouseover(d) {
-           var service = getService();
-           if (service) service.setStyles(context, d);
-         }
+         var check = function check(selection) {
+           checkImpliedYes();
+           label = selection.selectAll('.form-field-input-wrap').data([0]);
+           var enter = label.enter().append('label').attr('class', 'form-field-input-wrap form-field-input-check');
+           enter.append('input').property('indeterminate', field.type !== 'defaultCheck').attr('type', 'checkbox').attr('id', field.domId);
+           enter.append('span').html(texts[0]).attr('class', 'value');
 
-         function mouseout() {
-           var service = getService();
-           if (service) service.setStyles(context, null);
-         }
+           if (field.type === 'onewayCheck') {
+             enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
+           }
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
+           label = label.merge(enter);
+           input = label.selectAll('input');
+           text = label.selectAll('span.value');
+           input.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             var t = {};
 
-           if (d.pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
-             t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
-           } else if (d.ca) {
-             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-           }
+             if (Array.isArray(_tags[field.key])) {
+               if (values.indexOf('yes') !== -1) {
+                 t[field.key] = 'yes';
+               } else {
+                 t[field.key] = values[0];
+               }
+             } else {
+               t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
+             } // Don't cycle through `alternating` or `reversible` states - #4970
+             // (They are supported as translated strings, but should not toggle with clicks)
 
-           return t;
-         }
 
-         function filterImages(images) {
-           var showsPano = context.photos().showsPanoramic();
-           var showsFlat = context.photos().showsFlat();
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+             if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
+               t[field.key] = values[0];
+             }
 
-           if (!showsPano || !showsFlat) {
-             images = images.filter(function (image) {
-               if (image.pano) return showsPano;
-               return showsFlat;
+             dispatch.call('change', this, t);
+           });
+
+           if (field.type === 'onewayCheck') {
+             reverser = label.selectAll('.reverser');
+             reverser.call(reverserSetText).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               context.perform(function (graph) {
+                 for (var i in _entityIDs) {
+                   graph = actionReverse(_entityIDs[i])(graph);
+                 }
+
+                 return graph;
+               }, _t('operations.reverse.annotation.line', {
+                 n: 1
+               })); // must manually revalidate since no 'change' event was called
+
+               context.validator().validate();
+               select(this).call(reverserSetText);
              });
            }
+         };
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             images = images.filter(function (image) {
-               return new Date(image.captured_at).getTime() >= fromTimestamp;
-             });
+         check.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return check;
+         };
+
+         check.tags = function (tags) {
+           _tags = tags;
+
+           function isChecked(val) {
+             return val !== 'no' && val !== '' && val !== undefined && val !== null;
            }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             images = images.filter(function (image) {
-               return new Date(image.captured_at).getTime() <= toTimestamp;
-             });
+           function textFor(val) {
+             if (val === '') val = undefined;
+             var index = values.indexOf(val);
+             return index !== -1 ? texts[index] : '"' + val + '"';
            }
 
-           if (usernames) {
-             images = images.filter(function (image) {
-               return usernames.indexOf(image.captured_by) !== -1;
-             });
+           checkImpliedYes();
+           var isMixed = Array.isArray(tags[field.key]);
+           _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
+
+           if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
+             _value = 'yes';
            }
 
-           return images;
-         }
+           input.property('indeterminate', isMixed || field.type !== 'defaultCheck' && !_value).property('checked', isChecked(_value));
+           text.html(isMixed ? _t.html('inspector.multiple_values') : textFor(_value)).classed('mixed', isMixed);
+           label.classed('set', !!_value);
 
-         function filterSequences(sequences, service) {
-           var showsPano = context.photos().showsPanoramic();
-           var showsFlat = context.photos().showsFlat();
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+           if (field.type === 'onewayCheck') {
+             reverser.classed('hide', reverserHidden()).call(reverserSetText);
+           }
+         };
 
-           if (!showsPano || !showsFlat) {
-             sequences = sequences.filter(function (sequence) {
-               if (sequence.properties.hasOwnProperty('pano')) {
-                 if (sequence.properties.pano) return showsPano;
-                 return showsFlat;
-               } else {
-                 // if the sequence doesn't specify pano or not, search its images
-                 var cProps = sequence.properties.coordinateProperties;
+         check.focus = function () {
+           input.node().focus();
+         };
 
-                 if (cProps && cProps.image_keys && cProps.image_keys.length > 0) {
-                   for (var index in cProps.image_keys) {
-                     var imageKey = cProps.image_keys[index];
-                     var image = service.cachedImage(imageKey);
+         return utilRebind(check, dispatch, 'on');
+       }
 
-                     if (image && image.hasOwnProperty('pano')) {
-                       if (image.pano) return showsPano;
-                       return showsFlat;
-                     }
-                   }
-                 }
-               }
+       function uiFieldCombo(field, context) {
+         var dispatch = dispatch$8('change');
 
-               return false;
-             });
-           }
+         var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             sequences = sequences.filter(function (sequence) {
-               return new Date(sequence.properties.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+         var _isNetwork = field.type === 'networkCombo';
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             sequences = sequences.filter(function (sequence) {
-               return new Date(sequence.properties.captured_at).getTime() <= toTimestamp;
-             });
-           }
+         var _isSemi = field.type === 'semiCombo';
 
-           if (usernames) {
-             sequences = sequences.filter(function (sequence) {
-               return usernames.indexOf(sequence.properties.username) !== -1;
-             });
-           }
+         var _optarray = field.options;
 
-           return sequences;
-         }
+         var _showTagInfoSuggestions = field.type !== 'manyCombo' && field.autoSuggestions !== false;
 
-         function update() {
-           var z = ~~context.map().zoom();
-           var showMarkers = z >= minMarkerZoom;
-           var showViewfields = z >= minViewfieldZoom;
-           var service = getService();
-           var sequences = service ? service.sequences(projection) : [];
-           var images = service && showMarkers ? service.images(projection) : [];
-           images = filterImages(images);
-           sequences = filterSequences(sequences, service);
-           service.filterViewer(context);
-           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-             return d.properties.key;
-           }); // exit
+         var _allowCustomValues = field.type !== 'manyCombo' && field.customValues !== false;
 
-           traces.exit().remove(); // enter/update
+         var _snake_case = field.snake_case || field.snake_case === undefined;
 
-           traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
-           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
-             return d.key;
-           }); // exit
+         var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
 
-           groups.exit().remove(); // enter
+         var _container = select(null);
 
-           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
-           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+         var _inputWrap = select(null);
 
-           var markers = groups.merge(groupsEnter).sort(function (a, b) {
-             return b.loc[1] - a.loc[1]; // sort Y
-           }).attr('transform', transform).select('.viewfield-scale');
-           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
-           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
-           viewfields.exit().remove();
-           viewfields.enter() // viewfields may or may not be drawn...
-           .insert('path', 'circle') // but if they are, draw below the circles
-           .attr('class', 'viewfield').classed('pano', function () {
-             return this.parentNode.__data__.pano;
-           }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+         var _input = select(null);
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+         var _comboData = [];
+         var _multiData = [];
+         var _entityIDs = [];
 
-             if (d.pano) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-             } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-             }
-           }
-         }
+         var _tags;
 
-         function drawImages(selection) {
-           var enabled = svgMapillaryImages.enabled;
-           var service = getService();
-           layer = selection.selectAll('.layer-mapillary').data(service ? [0] : []);
-           layer.exit().remove();
-           var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary').style('display', enabled ? 'block' : 'none');
-           layerEnter.append('g').attr('class', 'sequences');
-           layerEnter.append('g').attr('class', 'markers');
-           layer = layerEnter.merge(layer);
+         var _countryCode;
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadImages(projection);
-             } else {
-               editOff();
-             }
-           }
-         }
+         var _staticPlaceholder; // initialize deprecated tags array
 
-         drawImages.enabled = function (_) {
-           if (!arguments.length) return svgMapillaryImages.enabled;
-           svgMapillaryImages.enabled = _;
 
-           if (svgMapillaryImages.enabled) {
-             showLayer();
-             context.photos().on('change.mapillary_images', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.mapillary_images', null);
-           }
+         var _dataDeprecated = [];
+         _mainFileFetcher.get('deprecated').then(function (d) {
+           _dataDeprecated = d;
+         })["catch"](function () {
+           /* ignore */
+         }); // ensure multiCombo field.key ends with a ':'
 
-           dispatch.call('change');
-           return this;
-         };
+         if (_isMulti && field.key && /[^:]$/.test(field.key)) {
+           field.key += ':';
+         }
 
-         drawImages.supported = function () {
-           return !!getService();
-         };
+         function snake(s) {
+           return s.replace(/\s+/g, '_').toLowerCase();
+         }
 
-         init();
-         return drawImages;
-       }
+         function clean(s) {
+           return s.split(';').map(function (s) {
+             return s.trim();
+           }).join(';');
+         } // returns the tag value for a display value
+         // (for multiCombo, dval should be the key suffix, not the entire key)
 
-       function svgMapillaryPosition(projection, context) {
-         var throttledRedraw = throttle(function () {
-           update();
-         }, 1000);
 
-         var minZoom = 12;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
+         function tagValue(dval) {
+           dval = clean(dval || '');
 
-         var _mapillary;
+           var found = _comboData.find(function (o) {
+             return o.key && clean(o.value) === dval;
+           });
 
-         var viewerCompassAngle;
+           if (found) return found.key;
 
-         function init() {
-           if (svgMapillaryPosition.initialized) return; // run once
+           if (field.type === 'typeCombo' && !dval) {
+             return 'yes';
+           }
 
-           svgMapillaryPosition.initialized = true;
-         }
+           return (_snake_case ? snake(dval) : dval) || undefined;
+         } // returns the display value for a tag value
+         // (for multiCombo, tval should be the key suffix, not the entire key)
 
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
 
-             _mapillary.event.on('nodeChanged', throttledRedraw);
+         function displayValue(tval) {
+           tval = tval || '';
 
-             _mapillary.event.on('bearingChanged', function (e) {
-               viewerCompassAngle = e;
-               if (context.map().isTransformed()) return;
-               layer.selectAll('.viewfield-group.currentView').filter(function (d) {
-                 return d.pano;
-               }).attr('transform', transform);
+           if (field.hasTextForStringId('options.' + tval)) {
+             return field.t('options.' + tval, {
+               "default": tval
              });
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
            }
 
-           return _mapillary;
+           if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
+             return '';
+           }
+
+           return tval;
+         } // Compute the difference between arrays of objects by `value` property
+         //
+         // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
+         // > [{value:1}, {value:3}]
+         //
+
+
+         function objectDifference(a, b) {
+           return a.filter(function (d1) {
+             return !b.some(function (d2) {
+               return !d2.isMixed && d1.value === d2.value;
+             });
+           });
          }
 
-         function editOn() {
-           layer.style('display', 'block');
+         function initCombo(selection, attachTo) {
+           if (!_allowCustomValues) {
+             selection.attr('readonly', 'readonly');
+           }
+
+           if (_showTagInfoSuggestions && services.taginfo) {
+             selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
+             setTaginfoValues('', setPlaceholder);
+           } else {
+             selection.call(_combobox, attachTo);
+             setStaticValues(setPlaceholder);
+           }
          }
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
+         function setStaticValues(callback) {
+           if (!_optarray) return;
+           _comboData = _optarray.map(function (v) {
+             return {
+               key: v,
+               value: field.t('options.' + v, {
+                 "default": v
+               }),
+               title: v,
+               display: field.t.html('options.' + v, {
+                 "default": v
+               }),
+               klass: field.hasTextForStringId('options.' + v) ? '' : 'raw-option'
+             };
+           });
+
+           _combobox.data(objectDifference(_comboData, _multiData));
+
+           if (callback) callback(_comboData);
          }
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
+         function setTaginfoValues(q, callback) {
+           var fn = _isMulti ? 'multikeys' : 'values';
+           var query = (_isMulti ? field.key : '') + q;
+           var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
+
+           if (hasCountryPrefix) {
+             query = _countryCode + ':';
+           }
+
+           var params = {
+             debounce: q !== '',
+             key: field.key,
+             query: query
+           };
+
+           if (_entityIDs.length) {
+             params.geometry = context.graph().geometry(_entityIDs[0]);
+           }
+
+           services.taginfo[fn](params, function (err, data) {
+             if (err) return;
+             data = data.filter(function (d) {
+               if (field.type === 'typeCombo' && d.value === 'yes') {
+                 // don't show the fallback value
+                 return false;
+               } // don't show values with very low usage
+
 
-           if (d.pano && viewerCompassAngle !== null && isFinite(viewerCompassAngle)) {
-             t += ' rotate(' + Math.floor(viewerCompassAngle) + ',0,0)';
-           } else if (d.ca) {
-             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
-           }
+               return !d.count || d.count > 10;
+             });
+             var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
 
-           return t;
-         }
+             if (deprecatedValues) {
+               // don't suggest deprecated tag values
+               data = data.filter(function (d) {
+                 return deprecatedValues.indexOf(d.value) === -1;
+               });
+             }
 
-         function update() {
-           var z = ~~context.map().zoom();
-           var showViewfields = z >= minViewfieldZoom;
-           var service = getService();
-           var node = service && service.getActiveImage();
-           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(node ? [node] : [], function (d) {
-             return d.key;
-           }); // exit
+             if (hasCountryPrefix) {
+               data = data.filter(function (d) {
+                 return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
+               });
+             } // hide the caret if there are no suggestions
 
-           groups.exit().remove(); // enter
 
-           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group currentView highlighted');
-           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+             _container.classed('empty-combobox', data.length === 0);
 
-           var markers = groups.merge(groupsEnter).attr('transform', transform).select('.viewfield-scale');
-           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
-           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
-           viewfields.exit().remove();
-           viewfields.enter().insert('path', 'circle').attr('class', 'viewfield').classed('pano', function () {
-             return this.parentNode.__data__.pano;
-           }).attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', viewfieldPath);
+             _comboData = data.map(function (d) {
+               var k = d.value;
+               if (_isMulti) k = k.replace(field.key, '');
+               var label = field.t('options.' + k, {
+                 "default": k
+               });
+               return {
+                 key: k,
+                 value: label,
+                 display: field.t.html('options.' + k, {
+                   "default": k
+                 }),
+                 title: d.title || label,
+                 klass: field.hasTextForStringId('options.' + k) ? '' : 'raw-option'
+               };
+             });
+             _comboData = objectDifference(_comboData, _multiData);
+             if (callback) callback(_comboData);
+           });
+         }
 
-           function viewfieldPath() {
-             var d = this.parentNode.__data__;
+         function setPlaceholder(values) {
+           if (_isMulti || _isSemi) {
+             _staticPlaceholder = field.placeholder() || _t('inspector.add');
+           } else {
+             var vals = values.map(function (d) {
+               return d.value;
+             }).filter(function (s) {
+               return s.length < 20;
+             });
+             var placeholders = vals.length > 1 ? vals : values.map(function (d) {
+               return d.key;
+             });
+             _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
+           }
 
-             if (d.pano) {
-               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
-             } else {
-               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
-             }
+           if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
+             _staticPlaceholder += '…';
            }
-         }
 
-         function drawImages(selection) {
-           var service = getService();
-           layer = selection.selectAll('.layer-mapillary-position').data(service ? [0] : []);
-           layer.exit().remove();
-           var layerEnter = layer.enter().append('g').attr('class', 'layer-mapillary-position');
-           layerEnter.append('g').attr('class', 'markers');
-           layer = layerEnter.merge(layer);
+           var ph;
 
-           if (service && ~~context.map().zoom() >= minZoom) {
-             editOn();
-             update();
+           if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
+             ph = _t('inspector.multiple_values');
            } else {
-             editOff();
+             ph = _staticPlaceholder;
            }
+
+           _container.selectAll('input').attr('placeholder', ph);
          }
 
-         drawImages.enabled = function () {
-           update();
-           return this;
-         };
+         function change() {
+           var t = {};
+           var val;
 
-         drawImages.supported = function () {
-           return !!getService();
-         };
+           if (_isMulti || _isSemi) {
+             val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
 
-         init();
-         return drawImages;
-       }
+             _container.classed('active', false);
 
-       function svgMapillarySigns(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+             utilGetSetValue(_input, '');
+             var vals = val.split(';').filter(Boolean);
+             if (!vals.length) return;
 
-         var minZoom = 12;
-         var layer = select(null);
+             if (_isMulti) {
+               utilArrayUniq(vals).forEach(function (v) {
+                 var key = (field.key || '') + v;
 
-         var _mapillary;
+                 if (_tags) {
+                   // don't set a multicombo value to 'yes' if it already has a non-'no' value
+                   // e.g. `language:de=main`
+                   var old = _tags[key];
+                   if (typeof old === 'string' && old.toLowerCase() !== 'no') return;
+                 }
 
-         function init() {
-           if (svgMapillarySigns.initialized) return; // run once
+                 key = context.cleanTagKey(key);
+                 field.keys.push(key);
+                 t[key] = 'yes';
+               });
+             } else if (_isSemi) {
+               var arr = _multiData.map(function (d) {
+                 return d.key;
+               });
 
-           svgMapillarySigns.enabled = false;
-           svgMapillarySigns.initialized = true;
-         }
+               arr = arr.concat(vals);
+               t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
+             }
 
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
+             window.setTimeout(function () {
+               _input.node().focus();
+             }, 10);
+           } else {
+             var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
 
-             _mapillary.event.on('loadedSigns', throttledRedraw);
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
+             if (!rawValue && Array.isArray(_tags[field.key])) return;
+             val = context.cleanTagValue(tagValue(rawValue));
+             t[field.key] = val || undefined;
            }
 
-           return _mapillary;
+           dispatch.call('change', this, t);
          }
 
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           service.loadSignResources(context);
-           editOn();
-         }
+         function removeMultikey(d3_event, d) {
+           d3_event.preventDefault();
+           d3_event.stopPropagation();
+           var t = {};
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           editOff();
-         }
+           if (_isMulti) {
+             t[d.key] = undefined;
+           } else if (_isSemi) {
+             var arr = _multiData.map(function (md) {
+               return md.key === d.key ? null : md.key;
+             }).filter(Boolean);
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+             arr = utilArrayUniq(arr);
+             t[field.key] = arr.length ? arr.join(';') : undefined;
+           }
 
-         function editOff() {
-           layer.selectAll('.icon-sign').remove();
-           layer.style('display', 'none');
+           dispatch.call('change', this, t);
          }
 
-         function click(d3_event, d) {
-           var service = getService();
-           if (!service) return;
-           context.map().centerEase(d.loc);
-           var selectedImageKey = service.getSelectedImageKey();
-           var imageKey;
-           var highlightedDetection; // Pick one of the images the sign was detected in,
-           // preference given to an image already selected.
+         function combo(selection) {
+           _container = selection.selectAll('.form-field-input-wrap').data([0]);
+           var type = _isMulti || _isSemi ? 'multicombo' : 'combo';
+           _container = _container.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + type).merge(_container);
+
+           if (_isMulti || _isSemi) {
+             _container = _container.selectAll('.chiplist').data([0]);
+             var listClass = 'chiplist'; // Use a separate line for each value in the Destinations and Via fields
+             // to mimic highway exit signs
 
-           d.detections.forEach(function (detection) {
-             if (!imageKey || selectedImageKey === detection.image_key) {
-               imageKey = detection.image_key;
-               highlightedDetection = detection;
+             if (field.key === 'destination' || field.key === 'via') {
+               listClass += ' full-line-chips';
              }
-           });
 
-           if (imageKey === selectedImageKey) {
-             service.highlightDetection(highlightedDetection).selectImage(context, imageKey);
+             _container = _container.enter().append('ul').attr('class', listClass).on('click', function () {
+               window.setTimeout(function () {
+                 _input.node().focus();
+               }, 10);
+             }).merge(_container);
+             _inputWrap = _container.selectAll('.input-wrap').data([0]);
+             _inputWrap = _inputWrap.enter().append('li').attr('class', 'input-wrap').merge(_inputWrap);
+             _input = _inputWrap.selectAll('input').data([0]);
            } else {
-             service.ensureViewerLoaded(context).then(function () {
-               service.highlightDetection(highlightedDetection).selectImage(context, imageKey).showViewer(context);
-             });
-           }
-         }
-
-         function filterData(detectedFeatures) {
-           var service = getService();
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
-
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
-             });
+             _input = _container.selectAll('input').data([0]);
            }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
-             });
-           }
+           _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);
 
-           if (usernames && service) {
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return feature.detections.some(function (detection) {
-                 var imageKey = detection.image_key;
-                 var image = service.cachedImage(imageKey);
-                 return image && usernames.indexOf(image.captured_by) !== -1;
-               });
-             });
+           if (_isNetwork) {
+             var extent = combinedEntityExtent();
+             var countryCode = extent && iso1A2Code(extent.center());
+             _countryCode = countryCode && countryCode.toLowerCase();
            }
 
-           return detectedFeatures;
-         }
-
-         function update() {
-           var service = getService();
-           var data = service ? service.signs(projection) : [];
-           data = filterData(data);
-           var selectedImageKey = service.getSelectedImageKey();
-           var transform = svgPointTransform(projection);
-           var signs = layer.selectAll('.icon-sign').data(data, function (d) {
-             return d.key;
-           }); // exit
-
-           signs.exit().remove(); // enter
+           _input.on('change', change).on('blur', change);
 
-           var enter = signs.enter().append('g').attr('class', 'icon-sign icon-detected').on('click', click);
-           enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
-             return '#' + d.value;
-           });
-           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
+           _input.on('keydown.field', function (d3_event) {
+             switch (d3_event.keyCode) {
+               case 13:
+                 // ↩ Return
+                 _input.node().blur(); // blurring also enters the value
 
-           signs.merge(enter).attr('transform', transform).classed('currentView', function (d) {
-             return d.detections.some(function (detection) {
-               return detection.image_key === selectedImageKey;
-             });
-           }).sort(function (a, b) {
-             var aSelected = a.detections.some(function (detection) {
-               return detection.image_key === selectedImageKey;
-             });
-             var bSelected = b.detections.some(function (detection) {
-               return detection.image_key === selectedImageKey;
-             });
 
-             if (aSelected === bSelected) {
-               return b.loc[1] - a.loc[1]; // sort Y
-             } else if (aSelected) {
-               return 1;
+                 d3_event.stopPropagation();
+                 break;
              }
-
-             return -1;
            });
-         }
 
-         function drawSigns(selection) {
-           var enabled = svgMapillarySigns.enabled;
-           var service = getService();
-           layer = selection.selectAll('.layer-mapillary-signs').data(service ? [0] : []);
-           layer.exit().remove();
-           layer = layer.enter().append('g').attr('class', 'layer-mapillary-signs layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
+           if (_isMulti || _isSemi) {
+             _combobox.on('accept', function () {
+               _input.node().blur();
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadSigns(projection);
-               service.showSignDetections(true);
-             } else {
-               editOff();
-             }
-           } else if (service) {
-             service.showSignDetections(false);
+               _input.node().focus();
+             });
+
+             _input.on('focus', function () {
+               _container.classed('active', true);
+             });
            }
          }
 
-         drawSigns.enabled = function (_) {
-           if (!arguments.length) return svgMapillarySigns.enabled;
-           svgMapillarySigns.enabled = _;
-
-           if (svgMapillarySigns.enabled) {
-             showLayer();
-             context.photos().on('change.mapillary_signs', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.mapillary_signs', null);
-           }
+         combo.tags = function (tags) {
+           _tags = tags;
 
-           dispatch.call('change');
-           return this;
-         };
+           if (_isMulti || _isSemi) {
+             _multiData = [];
+             var maxLength;
 
-         drawSigns.supported = function () {
-           return !!getService();
-         };
+             if (_isMulti) {
+               // Build _multiData array containing keys already set..
+               for (var k in tags) {
+                 if (field.key && k.indexOf(field.key) !== 0) continue;
+                 if (!field.key && field.keys.indexOf(k) === -1) continue;
+                 var v = tags[k];
+                 if (!v || typeof v === 'string' && v.toLowerCase() === 'no') continue;
+                 var suffix = field.key ? k.substr(field.key.length) : k;
 
-         init();
-         return drawSigns;
-       }
+                 _multiData.push({
+                   key: k,
+                   value: displayValue(suffix),
+                   isMixed: Array.isArray(v)
+                 });
+               }
 
-       function svgMapillaryMapFeatures(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+               if (field.key) {
+                 // Set keys for form-field modified (needed for undo and reset buttons)..
+                 field.keys = _multiData.map(function (d) {
+                   return d.key;
+                 }); // limit the input length so it fits after prepending the key prefix
 
-         var minZoom = 12;
-         var layer = select(null);
+                 maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
+               } else {
+                 maxLength = context.maxCharsForTagKey();
+               }
+             } else if (_isSemi) {
+               var allValues = [];
+               var commonValues;
 
-         var _mapillary;
+               if (Array.isArray(tags[field.key])) {
+                 tags[field.key].forEach(function (tagVal) {
+                   var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
+                   allValues = allValues.concat(thisVals);
 
-         function init() {
-           if (svgMapillaryMapFeatures.initialized) return; // run once
+                   if (!commonValues) {
+                     commonValues = thisVals;
+                   } else {
+                     commonValues = commonValues.filter(function (value) {
+                       return thisVals.includes(value);
+                     });
+                   }
+                 });
+                 allValues = utilArrayUniq(allValues).filter(Boolean);
+               } else {
+                 allValues = utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
+                 commonValues = allValues;
+               }
 
-           svgMapillaryMapFeatures.enabled = false;
-           svgMapillaryMapFeatures.initialized = true;
-         }
+               _multiData = allValues.map(function (v) {
+                 return {
+                   key: v,
+                   value: displayValue(v),
+                   isMixed: !commonValues.includes(v)
+                 };
+               });
+               var currLength = utilUnicodeCharsCount(commonValues.join(';')); // limit the input length to the remaining available characters
 
-         function getService() {
-           if (services.mapillary && !_mapillary) {
-             _mapillary = services.mapillary;
+               maxLength = context.maxCharsForTagValue() - currLength;
 
-             _mapillary.event.on('loadedMapFeatures', throttledRedraw);
-           } else if (!services.mapillary && _mapillary) {
-             _mapillary = null;
-           }
+               if (currLength > 0) {
+                 // account for the separator if a new value will be appended to existing
+                 maxLength -= 1;
+               }
+             } // a negative maxlength doesn't make sense
 
-           return _mapillary;
-         }
 
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           service.loadObjectResources(context);
-           editOn();
-         }
+             maxLength = Math.max(0, maxLength);
+             var allowDragAndDrop = _isSemi // only semiCombo values are ordered
+             && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           editOff();
-         }
+             var available = objectDifference(_comboData, _multiData);
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+             _combobox.data(available); // Hide 'Add' button if this field uses fixed set of
+             // options and they're all currently used,
+             // or if the field is already at its character limit
 
-         function editOff() {
-           layer.selectAll('.icon-map-feature').remove();
-           layer.style('display', 'none');
-         }
 
-         function click(d3_event, d) {
-           var service = getService();
-           if (!service) return;
-           context.map().centerEase(d.loc);
-           var selectedImageKey = service.getSelectedImageKey();
-           var imageKey;
-           var highlightedDetection; // Pick one of the images the map feature was detected in,
-           // preference given to an image already selected.
+             var hideAdd = !_allowCustomValues && !available.length || maxLength <= 0;
 
-           d.detections.forEach(function (detection) {
-             if (!imageKey || selectedImageKey === detection.image_key) {
-               imageKey = detection.image_key;
-               highlightedDetection = detection;
-             }
-           });
+             _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
 
-           if (imageKey === selectedImageKey) {
-             service.highlightDetection(highlightedDetection).selectImage(context, imageKey);
-           } else {
-             service.ensureViewerLoaded(context).then(function () {
-               service.highlightDetection(highlightedDetection).selectImage(context, imageKey).showViewer(context);
-             });
-           }
-         }
 
-         function filterData(detectedFeatures) {
-           var service = getService();
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+             var chips = _container.selectAll('.chip').data(_multiData);
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.last_seen_at).getTime() >= fromTimestamp;
+             chips.exit().remove();
+             var enter = chips.enter().insert('li', '.input-wrap').attr('class', 'chip');
+             enter.append('span');
+             enter.append('a');
+             chips = chips.merge(enter).order().classed('raw-value', function (d) {
+               var k = d.key;
+               if (_isMulti) k = k.replace(field.key, '');
+               return !field.hasTextForStringId('options.' + k);
+             }).classed('draggable', allowDragAndDrop).classed('mixed', function (d) {
+               return d.isMixed;
+             }).attr('title', function (d) {
+               return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
              });
-           }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return new Date(feature.first_seen_at).getTime() <= toTimestamp;
-             });
-           }
+             if (allowDragAndDrop) {
+               registerDragAndDrop(chips);
+             }
 
-           if (usernames && service) {
-             detectedFeatures = detectedFeatures.filter(function (feature) {
-               return feature.detections.some(function (detection) {
-                 var imageKey = detection.image_key;
-                 var image = service.cachedImage(imageKey);
-                 return image && usernames.indexOf(image.captured_by) !== -1;
-               });
+             chips.select('span').text(function (d) {
+               return d.value;
+             });
+             chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').text('×');
+           } else {
+             var isMixed = Array.isArray(tags[field.key]);
+             var mixedValues = isMixed && tags[field.key].map(function (val) {
+               return displayValue(val);
+             }).filter(Boolean);
+             var showsValue = !isMixed && tags[field.key] && !(field.type === 'typeCombo' && tags[field.key] === 'yes');
+             var isRawValue = showsValue && !field.hasTextForStringId('options.' + tags[field.key]);
+             var isKnownValue = showsValue && !isRawValue;
+             var isReadOnly = !_allowCustomValues || isKnownValue;
+             utilGetSetValue(_input, !isMixed ? displayValue(tags[field.key]) : '').classed('raw-value', isRawValue).classed('known-value', isKnownValue).attr('readonly', isReadOnly ? 'readonly' : undefined).attr('title', isMixed ? mixedValues.join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '').classed('mixed', isMixed).on('keydown.deleteCapture', function (d3_event) {
+               if (isReadOnly && isKnownValue && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation();
+                 var t = {};
+                 t[field.key] = undefined;
+                 dispatch.call('change', this, t);
+               }
              });
            }
+         };
 
-           return detectedFeatures;
-         }
-
-         function update() {
-           var service = getService();
-           var data = service ? service.mapFeatures(projection) : [];
-           data = filterData(data);
-           var selectedImageKey = service && service.getSelectedImageKey();
-           var transform = svgPointTransform(projection);
-           var mapFeatures = layer.selectAll('.icon-map-feature').data(data, function (d) {
-             return d.key;
-           }); // exit
-
-           mapFeatures.exit().remove(); // enter
-
-           var enter = mapFeatures.enter().append('g').attr('class', 'icon-map-feature icon-detected').on('click', click);
-           enter.append('title').text(function (d) {
-             var id = d.value.replace(/--/g, '.').replace(/-/g, '_');
-             return _t('mapillary_map_features.' + id);
-           });
-           enter.append('use').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px').attr('xlink:href', function (d) {
-             if (d.value === 'object--billboard') {
-               // no billboard icon right now, so use the advertisement icon
-               return '#object--sign--advertisement';
-             }
-
-             return '#' + d.value;
-           });
-           enter.append('rect').attr('width', '24px').attr('height', '24px').attr('x', '-12px').attr('y', '-12px'); // update
+         function registerDragAndDrop(selection) {
+           // allow drag and drop re-ordering of chips
+           var dragOrigin, targetIndex;
+           selection.call(d3_drag().on('start', function (d3_event) {
+             dragOrigin = {
+               x: d3_event.x,
+               y: d3_event.y
+             };
+             targetIndex = null;
+           }).on('drag', function (d3_event) {
+             var x = d3_event.x - dragOrigin.x,
+                 y = d3_event.y - dragOrigin.y;
+             if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+             Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+             var index = selection.nodes().indexOf(this);
+             select(this).classed('dragging', true);
+             targetIndex = null;
+             var targetIndexOffsetTop = null;
+             var draggedTagWidth = select(this).node().offsetWidth;
 
-           mapFeatures.merge(enter).attr('transform', transform).classed('currentView', function (d) {
-             return d.detections.some(function (detection) {
-               return detection.image_key === selectedImageKey;
-             });
-           }).sort(function (a, b) {
-             var aSelected = a.detections.some(function (detection) {
-               return detection.image_key === selectedImageKey;
-             });
-             var bSelected = b.detections.some(function (detection) {
-               return detection.image_key === selectedImageKey;
-             });
+             if (field.key === 'destination' || field.key === 'via') {
+               // meaning tags are full width
+               _container.selectAll('.chip').style('transform', function (d2, index2) {
+                 var node = select(this).node();
 
-             if (aSelected === bSelected) {
-               return b.loc[1] - a.loc[1]; // sort Y
-             } else if (aSelected) {
-               return 1;
-             }
+                 if (index === index2) {
+                   return 'translate(' + x + 'px, ' + y + 'px)'; // move the dragged tag up the order
+                 } else if (index2 > index && d3_event.y > node.offsetTop) {
+                   if (targetIndex === null || index2 > targetIndex) {
+                     targetIndex = index2;
+                   }
 
-             return -1;
-           });
-         }
+                   return 'translateY(-100%)'; // move the dragged tag down the order
+                 } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+                   if (targetIndex === null || index2 < targetIndex) {
+                     targetIndex = index2;
+                   }
 
-         function drawMapFeatures(selection) {
-           var enabled = svgMapillaryMapFeatures.enabled;
-           var service = getService();
-           layer = selection.selectAll('.layer-mapillary-map-features').data(service ? [0] : []);
-           layer.exit().remove();
-           layer = layer.enter().append('g').attr('class', 'layer-mapillary-map-features layer-mapillary-detections').style('display', enabled ? 'block' : 'none').merge(layer);
+                   return 'translateY(100%)';
+                 }
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadMapFeatures(projection);
-               service.showFeatureDetections(true);
+                 return null;
+               });
              } else {
-               editOff();
-             }
-           } else if (service) {
-             service.showFeatureDetections(false);
-           }
-         }
+               _container.selectAll('.chip').each(function (d2, index2) {
+                 var node = select(this).node(); // check the cursor is in the bounding box
 
-         drawMapFeatures.enabled = function (_) {
-           if (!arguments.length) return svgMapillaryMapFeatures.enabled;
-           svgMapillaryMapFeatures.enabled = _;
+                 if (index !== index2 && d3_event.x < node.offsetLeft + node.offsetWidth + 5 && d3_event.x > node.offsetLeft && d3_event.y < node.offsetTop + node.offsetHeight && d3_event.y > node.offsetTop) {
+                   targetIndex = index2;
+                   targetIndexOffsetTop = node.offsetTop;
+                 }
+               }).style('transform', function (d2, index2) {
+                 var node = select(this).node();
 
-           if (svgMapillaryMapFeatures.enabled) {
-             showLayer();
-             context.photos().on('change.mapillary_map_features', update);
-           } else {
-             hideLayer();
-             context.photos().on('change.mapillary_map_features', null);
-           }
+                 if (index === index2) {
+                   return 'translate(' + x + 'px, ' + y + 'px)';
+                 } // only translate tags in the same row
 
-           dispatch.call('change');
-           return this;
-         };
 
-         drawMapFeatures.supported = function () {
-           return !!getService();
-         };
+                 if (node.offsetTop === targetIndexOffsetTop) {
+                   if (index2 < index && index2 >= targetIndex) {
+                     return 'translateX(' + draggedTagWidth + 'px)';
+                   } else if (index2 > index && index2 <= targetIndex) {
+                     return 'translateX(-' + draggedTagWidth + 'px)';
+                   }
+                 }
 
-         init();
-         return drawMapFeatures;
-       }
+                 return null;
+               });
+             }
+           }).on('end', function () {
+             if (!select(this).classed('dragging')) {
+               return;
+             }
 
-       function svgOpenstreetcamImages(projection, context, dispatch) {
-         var throttledRedraw = throttle(function () {
-           dispatch.call('change');
-         }, 1000);
+             var index = selection.nodes().indexOf(this);
+             select(this).classed('dragging', false);
 
-         var minZoom = 12;
-         var minMarkerZoom = 16;
-         var minViewfieldZoom = 18;
-         var layer = select(null);
+             _container.selectAll('.chip').style('transform', null);
 
-         var _openstreetcam;
+             if (typeof targetIndex === 'number') {
+               var element = _multiData[index];
 
-         function init() {
-           if (svgOpenstreetcamImages.initialized) return; // run once
+               _multiData.splice(index, 1);
 
-           svgOpenstreetcamImages.enabled = false;
-           svgOpenstreetcamImages.initialized = true;
-         }
+               _multiData.splice(targetIndex, 0, element);
 
-         function getService() {
-           if (services.openstreetcam && !_openstreetcam) {
-             _openstreetcam = services.openstreetcam;
+               var t = {};
 
-             _openstreetcam.event.on('loadedImages', throttledRedraw);
-           } else if (!services.openstreetcam && _openstreetcam) {
-             _openstreetcam = null;
-           }
+               if (_multiData.length) {
+                 t[field.key] = _multiData.map(function (element) {
+                   return element.key;
+                 }).join(';');
+               } else {
+                 t[field.key] = undefined;
+               }
 
-           return _openstreetcam;
-         }
+               dispatch.call('change', this, t);
+             }
 
-         function showLayer() {
-           var service = getService();
-           if (!service) return;
-           editOn();
-           layer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end', function () {
-             dispatch.call('change');
-           });
+             dragOrigin = undefined;
+             targetIndex = undefined;
+           }));
          }
 
-         function hideLayer() {
-           throttledRedraw.cancel();
-           layer.transition().duration(250).style('opacity', 0).on('end', editOff);
-         }
+         combo.focus = function () {
+           _input.node().focus();
+         };
 
-         function editOn() {
-           layer.style('display', 'block');
-         }
+         combo.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return combo;
+         };
 
-         function editOff() {
-           layer.selectAll('.viewfield-group').remove();
-           layer.style('display', 'none');
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }
 
-         function click(d3_event, d) {
-           var service = getService();
-           if (!service) return;
-           service.ensureViewerLoaded(context).then(function () {
-             service.selectImage(context, d.key).showViewer(context);
-           });
-           context.map().centerEase(d.loc);
-         }
+         return utilRebind(combo, dispatch, 'on');
+       }
 
-         function mouseover(d3_event, d) {
-           var service = getService();
-           if (service) service.setStyles(context, d);
-         }
+       // based on https://github.com/bestiejs/punycode.js/blob/master/punycode.js
+       var global$2 = global$1m;
+       var uncurryThis$1 = functionUncurryThis;
 
-         function mouseout() {
-           var service = getService();
-           if (service) service.setStyles(context, null);
-         }
+       var maxInt = 2147483647; // aka. 0x7FFFFFFF or 2^31-1
+       var base = 36;
+       var tMin = 1;
+       var tMax = 26;
+       var skew = 38;
+       var damp = 700;
+       var initialBias = 72;
+       var initialN = 128; // 0x80
+       var delimiter = '-'; // '\x2D'
+       var regexNonASCII = /[^\0-\u007E]/; // non-ASCII chars
+       var regexSeparators = /[.\u3002\uFF0E\uFF61]/g; // RFC 3490 separators
+       var OVERFLOW_ERROR = 'Overflow: input needs wider integers to process';
+       var baseMinusTMin = base - tMin;
 
-         function transform(d) {
-           var t = svgPointTransform(projection)(d);
+       var RangeError$1 = global$2.RangeError;
+       var exec$1 = uncurryThis$1(regexSeparators.exec);
+       var floor$1 = Math.floor;
+       var fromCharCode = String.fromCharCode;
+       var charCodeAt = uncurryThis$1(''.charCodeAt);
+       var join$1 = uncurryThis$1([].join);
+       var push$1 = uncurryThis$1([].push);
+       var replace$1 = uncurryThis$1(''.replace);
+       var split$1 = uncurryThis$1(''.split);
+       var toLowerCase$1 = uncurryThis$1(''.toLowerCase);
 
-           if (d.ca) {
-             t += ' rotate(' + Math.floor(d.ca) + ',0,0)';
+       /**
+        * Creates an array containing the numeric code points of each Unicode
+        * character in the string. While JavaScript uses UCS-2 internally,
+        * this function will convert a pair of surrogate halves (each of which
+        * UCS-2 exposes as separate characters) into a single code point,
+        * matching UTF-16.
+        */
+       var ucs2decode = function (string) {
+         var output = [];
+         var counter = 0;
+         var length = string.length;
+         while (counter < length) {
+           var value = charCodeAt(string, counter++);
+           if (value >= 0xD800 && value <= 0xDBFF && counter < length) {
+             // It's a high surrogate, and there is a next character.
+             var extra = charCodeAt(string, counter++);
+             if ((extra & 0xFC00) == 0xDC00) { // Low surrogate.
+               push$1(output, ((value & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000);
+             } else {
+               // It's an unmatched surrogate; only append this code unit, in case the
+               // next code unit is the high surrogate of a surrogate pair.
+               push$1(output, value);
+               counter--;
+             }
+           } else {
+             push$1(output, value);
            }
+         }
+         return output;
+       };
 
-           return t;
+       /**
+        * Converts a digit/integer into a basic code point.
+        */
+       var digitToBasic = function (digit) {
+         //  0..25 map to ASCII a..z or A..Z
+         // 26..35 map to ASCII 0..9
+         return digit + 22 + 75 * (digit < 26);
+       };
+
+       /**
+        * Bias adaptation function as per section 3.4 of RFC 3492.
+        * https://tools.ietf.org/html/rfc3492#section-3.4
+        */
+       var adapt = function (delta, numPoints, firstTime) {
+         var k = 0;
+         delta = firstTime ? floor$1(delta / damp) : delta >> 1;
+         delta += floor$1(delta / numPoints);
+         for (; delta > baseMinusTMin * tMax >> 1; k += base) {
+           delta = floor$1(delta / baseMinusTMin);
          }
+         return floor$1(k + (baseMinusTMin + 1) * delta / (delta + skew));
+       };
 
-         function filterImages(images) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+       /**
+        * Converts a string of Unicode symbols (e.g. a domain name label) to a
+        * Punycode string of ASCII-only symbols.
+        */
+       // eslint-disable-next-line max-statements -- TODO
+       var encode = function (input) {
+         var output = [];
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             images = images.filter(function (item) {
-               return new Date(item.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+         // Convert the input in UCS-2 to an array of Unicode code points.
+         input = ucs2decode(input);
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             images = images.filter(function (item) {
-               return new Date(item.captured_at).getTime() <= toTimestamp;
-             });
-           }
+         // Cache the length.
+         var inputLength = input.length;
 
-           if (usernames) {
-             images = images.filter(function (item) {
-               return usernames.indexOf(item.captured_by) !== -1;
-             });
-           }
+         // Initialize the state.
+         var n = initialN;
+         var delta = 0;
+         var bias = initialBias;
+         var i, currentValue;
 
-           return images;
+         // Handle the basic code points.
+         for (i = 0; i < input.length; i++) {
+           currentValue = input[i];
+           if (currentValue < 0x80) {
+             push$1(output, fromCharCode(currentValue));
+           }
          }
 
-         function filterSequences(sequences) {
-           var fromDate = context.photos().fromDate();
-           var toDate = context.photos().toDate();
-           var usernames = context.photos().usernames();
+         var basicLength = output.length; // number of basic code points.
+         var handledCPCount = basicLength; // number of code points that have been handled;
 
-           if (fromDate) {
-             var fromTimestamp = new Date(fromDate).getTime();
-             sequences = sequences.filter(function (image) {
-               return new Date(image.properties.captured_at).getTime() >= fromTimestamp;
-             });
-           }
+         // Finish the basic string with a delimiter unless it's empty.
+         if (basicLength) {
+           push$1(output, delimiter);
+         }
 
-           if (toDate) {
-             var toTimestamp = new Date(toDate).getTime();
-             sequences = sequences.filter(function (image) {
-               return new Date(image.properties.captured_at).getTime() <= toTimestamp;
-             });
+         // Main encoding loop:
+         while (handledCPCount < inputLength) {
+           // All non-basic code points < n have been handled already. Find the next larger one:
+           var m = maxInt;
+           for (i = 0; i < input.length; i++) {
+             currentValue = input[i];
+             if (currentValue >= n && currentValue < m) {
+               m = currentValue;
+             }
            }
 
-           if (usernames) {
-             sequences = sequences.filter(function (image) {
-               return usernames.indexOf(image.properties.captured_by) !== -1;
-             });
+           // Increase `delta` enough to advance the decoder's <n,i> state to <m,0>, but guard against overflow.
+           var handledCPCountPlusOne = handledCPCount + 1;
+           if (m - n > floor$1((maxInt - delta) / handledCPCountPlusOne)) {
+             throw RangeError$1(OVERFLOW_ERROR);
            }
 
-           return sequences;
-         }
+           delta += (m - n) * handledCPCountPlusOne;
+           n = m;
 
-         function update() {
-           var viewer = context.container().select('.photoviewer');
-           var selected = viewer.empty() ? undefined : viewer.datum();
-           var z = ~~context.map().zoom();
-           var showMarkers = z >= minMarkerZoom;
-           var showViewfields = z >= minViewfieldZoom;
-           var service = getService();
-           var sequences = [];
-           var images = [];
+           for (i = 0; i < input.length; i++) {
+             currentValue = input[i];
+             if (currentValue < n && ++delta > maxInt) {
+               throw RangeError$1(OVERFLOW_ERROR);
+             }
+             if (currentValue == n) {
+               // Represent delta as a generalized variable-length integer.
+               var q = delta;
+               for (var k = base; /* no condition */; k += base) {
+                 var t = k <= bias ? tMin : (k >= bias + tMax ? tMax : k - bias);
+                 if (q < t) break;
+                 var qMinusT = q - t;
+                 var baseMinusT = base - t;
+                 push$1(output, fromCharCode(digitToBasic(t + qMinusT % baseMinusT)));
+                 q = floor$1(qMinusT / baseMinusT);
+               }
 
-           if (context.photos().showsFlat()) {
-             sequences = service ? service.sequences(projection) : [];
-             images = service && showMarkers ? service.images(projection) : [];
-             sequences = filterSequences(sequences);
-             images = filterImages(images);
+               push$1(output, fromCharCode(digitToBasic(q)));
+               bias = adapt(delta, handledCPCountPlusOne, handledCPCount == basicLength);
+               delta = 0;
+               ++handledCPCount;
+             }
            }
 
-           var traces = layer.selectAll('.sequences').selectAll('.sequence').data(sequences, function (d) {
-             return d.properties.key;
-           }); // exit
-
-           traces.exit().remove(); // enter/update
+           ++delta;
+           ++n;
+         }
+         return join$1(output, '');
+       };
 
-           traces = traces.enter().append('path').attr('class', 'sequence').merge(traces).attr('d', svgPath(projection).geojson);
-           var groups = layer.selectAll('.markers').selectAll('.viewfield-group').data(images, function (d) {
-             return d.key;
-           }); // exit
+       var stringPunycodeToAscii = function (input) {
+         var encoded = [];
+         var labels = split$1(replace$1(toLowerCase$1(input), regexSeparators, '\u002E'), '.');
+         var i, label;
+         for (i = 0; i < labels.length; i++) {
+           label = labels[i];
+           push$1(encoded, exec$1(regexNonASCII, label) ? 'xn--' + encode(label) : label);
+         }
+         return join$1(encoded, '.');
+       };
 
-           groups.exit().remove(); // enter
+       // TODO: in core-js@4, move /modules/ dependencies to public entries for better optimization by tools like `preset-env`
 
-           var groupsEnter = groups.enter().append('g').attr('class', 'viewfield-group').on('mouseenter', mouseover).on('mouseleave', mouseout).on('click', click);
-           groupsEnter.append('g').attr('class', 'viewfield-scale'); // update
+       var $ = _export;
+       var DESCRIPTORS = descriptors;
+       var USE_NATIVE_URL = nativeUrl;
+       var global$1 = global$1m;
+       var bind$2 = functionBindContext;
+       var call = functionCall;
+       var uncurryThis = functionUncurryThis;
+       var defineProperties = objectDefineProperties;
+       var redefine = redefine$h.exports;
+       var anInstance = anInstance$7;
+       var hasOwn = hasOwnProperty_1;
+       var assign$1 = objectAssign;
+       var arrayFrom = arrayFrom$1;
+       var arraySlice = arraySlice$c;
+       var codeAt = stringMultibyte.codeAt;
+       var toASCII = stringPunycodeToAscii;
+       var $toString = toString$k;
+       var setToStringTag = setToStringTag$a;
+       var URLSearchParamsModule = web_urlSearchParams;
+       var InternalStateModule = internalState;
+
+       var setInternalState = InternalStateModule.set;
+       var getInternalURLState = InternalStateModule.getterFor('URL');
+       var URLSearchParams$1 = URLSearchParamsModule.URLSearchParams;
+       var getInternalSearchParamsState = URLSearchParamsModule.getState;
+
+       var NativeURL = global$1.URL;
+       var TypeError$1 = global$1.TypeError;
+       var parseInt$1 = global$1.parseInt;
+       var floor = Math.floor;
+       var pow = Math.pow;
+       var charAt = uncurryThis(''.charAt);
+       var exec = uncurryThis(/./.exec);
+       var join = uncurryThis([].join);
+       var numberToString = uncurryThis(1.0.toString);
+       var pop = uncurryThis([].pop);
+       var push = uncurryThis([].push);
+       var replace = uncurryThis(''.replace);
+       var shift = uncurryThis([].shift);
+       var split = uncurryThis(''.split);
+       var stringSlice = uncurryThis(''.slice);
+       var toLowerCase = uncurryThis(''.toLowerCase);
+       var unshift = uncurryThis([].unshift);
 
-           var markers = groups.merge(groupsEnter).sort(function (a, b) {
-             return a === selected ? 1 : b === selected ? -1 : b.loc[1] - a.loc[1]; // sort Y
-           }).attr('transform', transform).select('.viewfield-scale');
-           markers.selectAll('circle').data([0]).enter().append('circle').attr('dx', '0').attr('dy', '0').attr('r', '6');
-           var viewfields = markers.selectAll('.viewfield').data(showViewfields ? [0] : []);
-           viewfields.exit().remove();
-           viewfields.enter() // viewfields may or may not be drawn...
-           .insert('path', 'circle') // but if they are, draw below the circles
-           .attr('class', 'viewfield').attr('transform', 'scale(1.5,1.5),translate(-8, -13)').attr('d', 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z');
-         }
+       var INVALID_AUTHORITY = 'Invalid authority';
+       var INVALID_SCHEME = 'Invalid scheme';
+       var INVALID_HOST = 'Invalid host';
+       var INVALID_PORT = 'Invalid port';
 
-         function drawImages(selection) {
-           var enabled = svgOpenstreetcamImages.enabled,
-               service = getService();
-           layer = selection.selectAll('.layer-openstreetcam').data(service ? [0] : []);
-           layer.exit().remove();
-           var layerEnter = layer.enter().append('g').attr('class', 'layer-openstreetcam').style('display', enabled ? 'block' : 'none');
-           layerEnter.append('g').attr('class', 'sequences');
-           layerEnter.append('g').attr('class', 'markers');
-           layer = layerEnter.merge(layer);
+       var ALPHA = /[a-z]/i;
+       // eslint-disable-next-line regexp/no-obscure-range -- safe
+       var ALPHANUMERIC = /[\d+-.a-z]/i;
+       var DIGIT = /\d/;
+       var HEX_START = /^0x/i;
+       var OCT = /^[0-7]+$/;
+       var DEC = /^\d+$/;
+       var HEX = /^[\da-f]+$/i;
+       /* eslint-disable regexp/no-control-character -- safe */
+       var FORBIDDEN_HOST_CODE_POINT = /[\0\t\n\r #%/:<>?@[\\\]^|]/;
+       var FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT = /[\0\t\n\r #/:<>?@[\\\]^|]/;
+       var LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE = /^[\u0000-\u0020]+|[\u0000-\u0020]+$/g;
+       var TAB_AND_NEW_LINE = /[\t\n\r]/g;
+       /* eslint-enable regexp/no-control-character -- safe */
+       var EOF;
 
-           if (enabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               update();
-               service.loadImages(projection);
-             } else {
-               editOff();
-             }
+       var parseHost = function (url, input) {
+         var result, codePoints, index;
+         if (charAt(input, 0) == '[') {
+           if (charAt(input, input.length - 1) != ']') return INVALID_HOST;
+           result = parseIPv6(stringSlice(input, 1, -1));
+           if (!result) return INVALID_HOST;
+           url.host = result;
+         // opaque host
+         } else if (!isSpecial(url)) {
+           if (exec(FORBIDDEN_HOST_CODE_POINT_EXCLUDING_PERCENT, input)) return INVALID_HOST;
+           result = '';
+           codePoints = arrayFrom(input);
+           for (index = 0; index < codePoints.length; index++) {
+             result += percentEncode(codePoints[index], C0ControlPercentEncodeSet);
            }
+           url.host = result;
+         } else {
+           input = toASCII(input);
+           if (exec(FORBIDDEN_HOST_CODE_POINT, input)) return INVALID_HOST;
+           result = parseIPv4(input);
+           if (result === null) return INVALID_HOST;
+           url.host = result;
          }
+       };
 
-         drawImages.enabled = function (_) {
-           if (!arguments.length) return svgOpenstreetcamImages.enabled;
-           svgOpenstreetcamImages.enabled = _;
-
-           if (svgOpenstreetcamImages.enabled) {
-             showLayer();
-             context.photos().on('change.openstreetcam_images', update);
+       var parseIPv4 = function (input) {
+         var parts = split(input, '.');
+         var partsLength, numbers, index, part, radix, number, ipv4;
+         if (parts.length && parts[parts.length - 1] == '') {
+           parts.length--;
+         }
+         partsLength = parts.length;
+         if (partsLength > 4) return input;
+         numbers = [];
+         for (index = 0; index < partsLength; index++) {
+           part = parts[index];
+           if (part == '') return input;
+           radix = 10;
+           if (part.length > 1 && charAt(part, 0) == '0') {
+             radix = exec(HEX_START, part) ? 16 : 8;
+             part = stringSlice(part, radix == 8 ? 1 : 2);
+           }
+           if (part === '') {
+             number = 0;
            } else {
-             hideLayer();
-             context.photos().on('change.openstreetcam_images', null);
+             if (!exec(radix == 10 ? DEC : radix == 8 ? OCT : HEX, part)) return input;
+             number = parseInt$1(part, radix);
            }
+           push(numbers, number);
+         }
+         for (index = 0; index < partsLength; index++) {
+           number = numbers[index];
+           if (index == partsLength - 1) {
+             if (number >= pow(256, 5 - partsLength)) return null;
+           } else if (number > 255) return null;
+         }
+         ipv4 = pop(numbers);
+         for (index = 0; index < numbers.length; index++) {
+           ipv4 += numbers[index] * pow(256, 3 - index);
+         }
+         return ipv4;
+       };
 
-           dispatch.call('change');
-           return this;
-         };
+       // eslint-disable-next-line max-statements -- TODO
+       var parseIPv6 = function (input) {
+         var address = [0, 0, 0, 0, 0, 0, 0, 0];
+         var pieceIndex = 0;
+         var compress = null;
+         var pointer = 0;
+         var value, length, numbersSeen, ipv4Piece, number, swaps, swap;
 
-         drawImages.supported = function () {
-           return !!getService();
+         var chr = function () {
+           return charAt(input, pointer);
          };
 
-         init();
-         return drawImages;
-       }
-
-       function svgOsm(projection, context, dispatch) {
-         var enabled = true;
-
-         function drawOsm(selection) {
-           selection.selectAll('.layer-osm').data(['covered', 'areas', 'lines', 'points', 'labels']).enter().append('g').attr('class', function (d) {
-             return 'layer-osm ' + d;
-           });
-           selection.selectAll('.layer-osm.points').selectAll('.points-group').data(['points', 'midpoints', 'vertices', 'turns']).enter().append('g').attr('class', function (d) {
-             return 'points-group ' + d;
-           });
-         }
-
-         function showLayer() {
-           var layer = context.surface().selectAll('.data-layer.osm');
-           layer.interrupt();
-           layer.classed('disabled', false).style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-             dispatch.call('change');
-           });
+         if (chr() == ':') {
+           if (charAt(input, 1) != ':') return;
+           pointer += 2;
+           pieceIndex++;
+           compress = pieceIndex;
          }
-
-         function hideLayer() {
-           var layer = context.surface().selectAll('.data-layer.osm');
-           layer.interrupt();
-           layer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
-             layer.classed('disabled', true);
-             dispatch.call('change');
-           });
+         while (chr()) {
+           if (pieceIndex == 8) return;
+           if (chr() == ':') {
+             if (compress !== null) return;
+             pointer++;
+             pieceIndex++;
+             compress = pieceIndex;
+             continue;
+           }
+           value = length = 0;
+           while (length < 4 && exec(HEX, chr())) {
+             value = value * 16 + parseInt$1(chr(), 16);
+             pointer++;
+             length++;
+           }
+           if (chr() == '.') {
+             if (length == 0) return;
+             pointer -= length;
+             if (pieceIndex > 6) return;
+             numbersSeen = 0;
+             while (chr()) {
+               ipv4Piece = null;
+               if (numbersSeen > 0) {
+                 if (chr() == '.' && numbersSeen < 4) pointer++;
+                 else return;
+               }
+               if (!exec(DIGIT, chr())) return;
+               while (exec(DIGIT, chr())) {
+                 number = parseInt$1(chr(), 10);
+                 if (ipv4Piece === null) ipv4Piece = number;
+                 else if (ipv4Piece == 0) return;
+                 else ipv4Piece = ipv4Piece * 10 + number;
+                 if (ipv4Piece > 255) return;
+                 pointer++;
+               }
+               address[pieceIndex] = address[pieceIndex] * 256 + ipv4Piece;
+               numbersSeen++;
+               if (numbersSeen == 2 || numbersSeen == 4) pieceIndex++;
+             }
+             if (numbersSeen != 4) return;
+             break;
+           } else if (chr() == ':') {
+             pointer++;
+             if (!chr()) return;
+           } else if (chr()) return;
+           address[pieceIndex++] = value;
          }
+         if (compress !== null) {
+           swaps = pieceIndex - compress;
+           pieceIndex = 7;
+           while (pieceIndex != 0 && swaps > 0) {
+             swap = address[pieceIndex];
+             address[pieceIndex--] = address[compress + swaps - 1];
+             address[compress + --swaps] = swap;
+           }
+         } else if (pieceIndex != 8) return;
+         return address;
+       };
 
-         drawOsm.enabled = function (val) {
-           if (!arguments.length) return enabled;
-           enabled = val;
-
-           if (enabled) {
-             showLayer();
+       var findLongestZeroSequence = function (ipv6) {
+         var maxIndex = null;
+         var maxLength = 1;
+         var currStart = null;
+         var currLength = 0;
+         var index = 0;
+         for (; index < 8; index++) {
+           if (ipv6[index] !== 0) {
+             if (currLength > maxLength) {
+               maxIndex = currStart;
+               maxLength = currLength;
+             }
+             currStart = null;
+             currLength = 0;
            } else {
-             hideLayer();
+             if (currStart === null) currStart = index;
+             ++currLength;
            }
-
-           dispatch.call('change');
-           return this;
-         };
-
-         return drawOsm;
-       }
-
-       var _notesEnabled = false;
-
-       var _osmService;
-
-       function svgNotes(projection, context, dispatch$1) {
-         if (!dispatch$1) {
-           dispatch$1 = dispatch('change');
          }
+         if (currLength > maxLength) {
+           maxIndex = currStart;
+           maxLength = currLength;
+         }
+         return maxIndex;
+       };
 
-         var throttledRedraw = throttle(function () {
-           dispatch$1.call('change');
-         }, 1000);
-
-         var minZoom = 12;
-         var touchLayer = select(null);
-         var drawLayer = select(null);
-         var _notesVisible = false;
-
-         function markerPath(selection, klass) {
-           selection.attr('class', klass).attr('transform', 'translate(-8, -22)').attr('d', 'm17.5,0l-15,0c-1.37,0 -2.5,1.12 -2.5,2.5l0,11.25c0,1.37 1.12,2.5 2.5,2.5l3.75,0l0,3.28c0,0.38 0.43,0.6 0.75,0.37l4.87,-3.65l5.62,0c1.37,0 2.5,-1.12 2.5,-2.5l0,-11.25c0,-1.37 -1.12,-2.5 -2.5,-2.5z');
-         } // Loosely-coupled osm service for fetching notes.
-
+       var serializeHost = function (host) {
+         var result, index, compress, ignore0;
+         // ipv4
+         if (typeof host == 'number') {
+           result = [];
+           for (index = 0; index < 4; index++) {
+             unshift(result, host % 256);
+             host = floor(host / 256);
+           } return join(result, '.');
+         // ipv6
+         } else if (typeof host == 'object') {
+           result = '';
+           compress = findLongestZeroSequence(host);
+           for (index = 0; index < 8; index++) {
+             if (ignore0 && host[index] === 0) continue;
+             if (ignore0) ignore0 = false;
+             if (compress === index) {
+               result += index ? ':' : '::';
+               ignore0 = true;
+             } else {
+               result += numberToString(host[index], 16);
+               if (index < 7) result += ':';
+             }
+           }
+           return '[' + result + ']';
+         } return host;
+       };
 
-         function getService() {
-           if (services.osm && !_osmService) {
-             _osmService = services.osm;
+       var C0ControlPercentEncodeSet = {};
+       var fragmentPercentEncodeSet = assign$1({}, C0ControlPercentEncodeSet, {
+         ' ': 1, '"': 1, '<': 1, '>': 1, '`': 1
+       });
+       var pathPercentEncodeSet = assign$1({}, fragmentPercentEncodeSet, {
+         '#': 1, '?': 1, '{': 1, '}': 1
+       });
+       var userinfoPercentEncodeSet = assign$1({}, pathPercentEncodeSet, {
+         '/': 1, ':': 1, ';': 1, '=': 1, '@': 1, '[': 1, '\\': 1, ']': 1, '^': 1, '|': 1
+       });
 
-             _osmService.on('loadedNotes', throttledRedraw);
-           } else if (!services.osm && _osmService) {
-             _osmService = null;
-           }
+       var percentEncode = function (chr, set) {
+         var code = codeAt(chr, 0);
+         return code > 0x20 && code < 0x7F && !hasOwn(set, chr) ? chr : encodeURIComponent(chr);
+       };
 
-           return _osmService;
-         } // Show the notes
+       var specialSchemes = {
+         ftp: 21,
+         file: null,
+         http: 80,
+         https: 443,
+         ws: 80,
+         wss: 443
+       };
 
+       var isSpecial = function (url) {
+         return hasOwn(specialSchemes, url.scheme);
+       };
 
-         function editOn() {
-           if (!_notesVisible) {
-             _notesVisible = true;
-             drawLayer.style('display', 'block');
-           }
-         } // Immediately remove the notes and their touch targets
+       var includesCredentials = function (url) {
+         return url.username != '' || url.password != '';
+       };
 
+       var cannotHaveUsernamePasswordPort = function (url) {
+         return !url.host || url.cannotBeABaseURL || url.scheme == 'file';
+       };
 
-         function editOff() {
-           if (_notesVisible) {
-             _notesVisible = false;
-             drawLayer.style('display', 'none');
-             drawLayer.selectAll('.note').remove();
-             touchLayer.selectAll('.note').remove();
-           }
-         } // Enable the layer.  This shows the notes and transitions them to visible.
+       var isWindowsDriveLetter = function (string, normalized) {
+         var second;
+         return string.length == 2 && exec(ALPHA, charAt(string, 0))
+           && ((second = charAt(string, 1)) == ':' || (!normalized && second == '|'));
+       };
 
+       var startsWithWindowsDriveLetter = function (string) {
+         var third;
+         return string.length > 1 && isWindowsDriveLetter(stringSlice(string, 0, 2)) && (
+           string.length == 2 ||
+           ((third = charAt(string, 2)) === '/' || third === '\\' || third === '?' || third === '#')
+         );
+       };
 
-         function layerOn() {
-           editOn();
-           drawLayer.style('opacity', 0).transition().duration(250).style('opacity', 1).on('end interrupt', function () {
-             dispatch$1.call('change');
-           });
-         } // Disable the layer.  This transitions the layer invisible and then hides the notes.
+       var shortenURLsPath = function (url) {
+         var path = url.path;
+         var pathSize = path.length;
+         if (pathSize && (url.scheme != 'file' || pathSize != 1 || !isWindowsDriveLetter(path[0], true))) {
+           path.length--;
+         }
+       };
 
+       var isSingleDot = function (segment) {
+         return segment === '.' || toLowerCase(segment) === '%2e';
+       };
 
-         function layerOff() {
-           throttledRedraw.cancel();
-           drawLayer.interrupt();
-           touchLayer.selectAll('.note').remove();
-           drawLayer.transition().duration(250).style('opacity', 0).on('end interrupt', function () {
-             editOff();
-             dispatch$1.call('change');
-           });
-         } // Update the note markers
+       var isDoubleDot = function (segment) {
+         segment = toLowerCase(segment);
+         return segment === '..' || segment === '%2e.' || segment === '.%2e' || segment === '%2e%2e';
+       };
 
+       // States:
+       var SCHEME_START = {};
+       var SCHEME = {};
+       var NO_SCHEME = {};
+       var SPECIAL_RELATIVE_OR_AUTHORITY = {};
+       var PATH_OR_AUTHORITY = {};
+       var RELATIVE = {};
+       var RELATIVE_SLASH = {};
+       var SPECIAL_AUTHORITY_SLASHES = {};
+       var SPECIAL_AUTHORITY_IGNORE_SLASHES = {};
+       var AUTHORITY = {};
+       var HOST = {};
+       var HOSTNAME = {};
+       var PORT = {};
+       var FILE = {};
+       var FILE_SLASH = {};
+       var FILE_HOST = {};
+       var PATH_START = {};
+       var PATH = {};
+       var CANNOT_BE_A_BASE_URL_PATH = {};
+       var QUERY = {};
+       var FRAGMENT = {};
 
-         function updateMarkers() {
-           if (!_notesVisible || !_notesEnabled) return;
-           var service = getService();
-           var selectedID = context.selectedNoteID();
-           var data = service ? service.notes(projection) : [];
-           var getTransform = svgPointTransform(projection); // Draw markers..
+       // eslint-disable-next-line max-statements -- TODO
+       var parseURL = function (url, input, stateOverride, base) {
+         var state = stateOverride || SCHEME_START;
+         var pointer = 0;
+         var buffer = '';
+         var seenAt = false;
+         var seenBracket = false;
+         var seenPasswordToken = false;
+         var codePoints, chr, bufferCodePoints, failure;
 
-           var notes = drawLayer.selectAll('.note').data(data, function (d) {
-             return d.status + d.id;
-           }); // exit
+         if (!stateOverride) {
+           url.scheme = '';
+           url.username = '';
+           url.password = '';
+           url.host = null;
+           url.port = null;
+           url.path = [];
+           url.query = null;
+           url.fragment = null;
+           url.cannotBeABaseURL = false;
+           input = replace(input, LEADING_AND_TRAILING_C0_CONTROL_OR_SPACE, '');
+         }
 
-           notes.exit().remove(); // enter
+         input = replace(input, TAB_AND_NEW_LINE, '');
 
-           var notesEnter = notes.enter().append('g').attr('class', function (d) {
-             return 'note note-' + d.id + ' ' + d.status;
-           }).classed('new', function (d) {
-             return d.id < 0;
-           });
-           notesEnter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
-           notesEnter.append('path').call(markerPath, 'shadow');
-           notesEnter.append('use').attr('class', 'note-fill').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').attr('xlink:href', '#iD-icon-note');
-           notesEnter.selectAll('.icon-annotation').data(function (d) {
-             return [d];
-           }).enter().append('use').attr('class', 'icon-annotation').attr('width', '10px').attr('height', '10px').attr('x', '-3px').attr('y', '-19px').attr('xlink:href', function (d) {
-             return '#iD-icon-' + (d.id < 0 ? 'plus' : d.status === 'open' ? 'close' : 'apply');
-           }); // update
+         codePoints = arrayFrom(input);
 
-           notes.merge(notesEnter).sort(sortY).classed('selected', function (d) {
-             var mode = context.mode();
-             var isMoving = mode && mode.id === 'drag-note'; // no shadows when dragging
+         while (pointer <= codePoints.length) {
+           chr = codePoints[pointer];
+           switch (state) {
+             case SCHEME_START:
+               if (chr && exec(ALPHA, chr)) {
+                 buffer += toLowerCase(chr);
+                 state = SCHEME;
+               } else if (!stateOverride) {
+                 state = NO_SCHEME;
+                 continue;
+               } else return INVALID_SCHEME;
+               break;
 
-             return !isMoving && d.id === selectedID;
-           }).attr('transform', getTransform); // Draw targets..
+             case SCHEME:
+               if (chr && (exec(ALPHANUMERIC, chr) || chr == '+' || chr == '-' || chr == '.')) {
+                 buffer += toLowerCase(chr);
+               } else if (chr == ':') {
+                 if (stateOverride && (
+                   (isSpecial(url) != hasOwn(specialSchemes, buffer)) ||
+                   (buffer == 'file' && (includesCredentials(url) || url.port !== null)) ||
+                   (url.scheme == 'file' && !url.host)
+                 )) return;
+                 url.scheme = buffer;
+                 if (stateOverride) {
+                   if (isSpecial(url) && specialSchemes[url.scheme] == url.port) url.port = null;
+                   return;
+                 }
+                 buffer = '';
+                 if (url.scheme == 'file') {
+                   state = FILE;
+                 } else if (isSpecial(url) && base && base.scheme == url.scheme) {
+                   state = SPECIAL_RELATIVE_OR_AUTHORITY;
+                 } else if (isSpecial(url)) {
+                   state = SPECIAL_AUTHORITY_SLASHES;
+                 } else if (codePoints[pointer + 1] == '/') {
+                   state = PATH_OR_AUTHORITY;
+                   pointer++;
+                 } else {
+                   url.cannotBeABaseURL = true;
+                   push(url.path, '');
+                   state = CANNOT_BE_A_BASE_URL_PATH;
+                 }
+               } else if (!stateOverride) {
+                 buffer = '';
+                 state = NO_SCHEME;
+                 pointer = 0;
+                 continue;
+               } else return INVALID_SCHEME;
+               break;
 
-           if (touchLayer.empty()) return;
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var targets = touchLayer.selectAll('.note').data(data, function (d) {
-             return d.id;
-           }); // exit
+             case NO_SCHEME:
+               if (!base || (base.cannotBeABaseURL && chr != '#')) return INVALID_SCHEME;
+               if (base.cannotBeABaseURL && chr == '#') {
+                 url.scheme = base.scheme;
+                 url.path = arraySlice(base.path);
+                 url.query = base.query;
+                 url.fragment = '';
+                 url.cannotBeABaseURL = true;
+                 state = FRAGMENT;
+                 break;
+               }
+               state = base.scheme == 'file' ? FILE : RELATIVE;
+               continue;
 
-           targets.exit().remove(); // enter/update
+             case SPECIAL_RELATIVE_OR_AUTHORITY:
+               if (chr == '/' && codePoints[pointer + 1] == '/') {
+                 state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+                 pointer++;
+               } else {
+                 state = RELATIVE;
+                 continue;
+               } break;
 
-           targets.enter().append('rect').attr('width', '20px').attr('height', '20px').attr('x', '-8px').attr('y', '-22px').merge(targets).sort(sortY).attr('class', function (d) {
-             var newClass = d.id < 0 ? 'new' : '';
-             return 'note target note-' + d.id + ' ' + fillClass + newClass;
-           }).attr('transform', getTransform);
+             case PATH_OR_AUTHORITY:
+               if (chr == '/') {
+                 state = AUTHORITY;
+                 break;
+               } else {
+                 state = PATH;
+                 continue;
+               }
 
-           function sortY(a, b) {
-             return a.id === selectedID ? 1 : b.id === selectedID ? -1 : b.loc[1] - a.loc[1];
-           }
-         } // Draw the notes layer and schedule loading notes and updating markers.
+             case RELATIVE:
+               url.scheme = base.scheme;
+               if (chr == EOF) {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 url.path = arraySlice(base.path);
+                 url.query = base.query;
+               } else if (chr == '/' || (chr == '\\' && isSpecial(url))) {
+                 state = RELATIVE_SLASH;
+               } else if (chr == '?') {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 url.path = arraySlice(base.path);
+                 url.query = '';
+                 state = QUERY;
+               } else if (chr == '#') {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 url.path = arraySlice(base.path);
+                 url.query = base.query;
+                 url.fragment = '';
+                 state = FRAGMENT;
+               } else {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 url.path = arraySlice(base.path);
+                 url.path.length--;
+                 state = PATH;
+                 continue;
+               } break;
 
+             case RELATIVE_SLASH:
+               if (isSpecial(url) && (chr == '/' || chr == '\\')) {
+                 state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+               } else if (chr == '/') {
+                 state = AUTHORITY;
+               } else {
+                 url.username = base.username;
+                 url.password = base.password;
+                 url.host = base.host;
+                 url.port = base.port;
+                 state = PATH;
+                 continue;
+               } break;
 
-         function drawNotes(selection) {
-           var service = getService();
-           var surface = context.surface();
+             case SPECIAL_AUTHORITY_SLASHES:
+               state = SPECIAL_AUTHORITY_IGNORE_SLASHES;
+               if (chr != '/' || charAt(buffer, pointer + 1) != '/') continue;
+               pointer++;
+               break;
 
-           if (surface && !surface.empty()) {
-             touchLayer = surface.selectAll('.data-layer.touch .layer-touch.markers');
-           }
+             case SPECIAL_AUTHORITY_IGNORE_SLASHES:
+               if (chr != '/' && chr != '\\') {
+                 state = AUTHORITY;
+                 continue;
+               } break;
 
-           drawLayer = selection.selectAll('.layer-notes').data(service ? [0] : []);
-           drawLayer.exit().remove();
-           drawLayer = drawLayer.enter().append('g').attr('class', 'layer-notes').style('display', _notesEnabled ? 'block' : 'none').merge(drawLayer);
+             case AUTHORITY:
+               if (chr == '@') {
+                 if (seenAt) buffer = '%40' + buffer;
+                 seenAt = true;
+                 bufferCodePoints = arrayFrom(buffer);
+                 for (var i = 0; i < bufferCodePoints.length; i++) {
+                   var codePoint = bufferCodePoints[i];
+                   if (codePoint == ':' && !seenPasswordToken) {
+                     seenPasswordToken = true;
+                     continue;
+                   }
+                   var encodedCodePoints = percentEncode(codePoint, userinfoPercentEncodeSet);
+                   if (seenPasswordToken) url.password += encodedCodePoints;
+                   else url.username += encodedCodePoints;
+                 }
+                 buffer = '';
+               } else if (
+                 chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+                 (chr == '\\' && isSpecial(url))
+               ) {
+                 if (seenAt && buffer == '') return INVALID_AUTHORITY;
+                 pointer -= arrayFrom(buffer).length + 1;
+                 buffer = '';
+                 state = HOST;
+               } else buffer += chr;
+               break;
 
-           if (_notesEnabled) {
-             if (service && ~~context.map().zoom() >= minZoom) {
-               editOn();
-               service.loadNotes(projection);
-               updateMarkers();
-             } else {
-               editOff();
-             }
-           }
-         } // Toggles the layer on and off
+             case HOST:
+             case HOSTNAME:
+               if (stateOverride && url.scheme == 'file') {
+                 state = FILE_HOST;
+                 continue;
+               } else if (chr == ':' && !seenBracket) {
+                 if (buffer == '') return INVALID_HOST;
+                 failure = parseHost(url, buffer);
+                 if (failure) return failure;
+                 buffer = '';
+                 state = PORT;
+                 if (stateOverride == HOSTNAME) return;
+               } else if (
+                 chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+                 (chr == '\\' && isSpecial(url))
+               ) {
+                 if (isSpecial(url) && buffer == '') return INVALID_HOST;
+                 if (stateOverride && buffer == '' && (includesCredentials(url) || url.port !== null)) return;
+                 failure = parseHost(url, buffer);
+                 if (failure) return failure;
+                 buffer = '';
+                 state = PATH_START;
+                 if (stateOverride) return;
+                 continue;
+               } else {
+                 if (chr == '[') seenBracket = true;
+                 else if (chr == ']') seenBracket = false;
+                 buffer += chr;
+               } break;
 
+             case PORT:
+               if (exec(DIGIT, chr)) {
+                 buffer += chr;
+               } else if (
+                 chr == EOF || chr == '/' || chr == '?' || chr == '#' ||
+                 (chr == '\\' && isSpecial(url)) ||
+                 stateOverride
+               ) {
+                 if (buffer != '') {
+                   var port = parseInt$1(buffer, 10);
+                   if (port > 0xFFFF) return INVALID_PORT;
+                   url.port = (isSpecial(url) && port === specialSchemes[url.scheme]) ? null : port;
+                   buffer = '';
+                 }
+                 if (stateOverride) return;
+                 state = PATH_START;
+                 continue;
+               } else return INVALID_PORT;
+               break;
 
-         drawNotes.enabled = function (val) {
-           if (!arguments.length) return _notesEnabled;
-           _notesEnabled = val;
+             case FILE:
+               url.scheme = 'file';
+               if (chr == '/' || chr == '\\') state = FILE_SLASH;
+               else if (base && base.scheme == 'file') {
+                 if (chr == EOF) {
+                   url.host = base.host;
+                   url.path = arraySlice(base.path);
+                   url.query = base.query;
+                 } else if (chr == '?') {
+                   url.host = base.host;
+                   url.path = arraySlice(base.path);
+                   url.query = '';
+                   state = QUERY;
+                 } else if (chr == '#') {
+                   url.host = base.host;
+                   url.path = arraySlice(base.path);
+                   url.query = base.query;
+                   url.fragment = '';
+                   state = FRAGMENT;
+                 } else {
+                   if (!startsWithWindowsDriveLetter(join(arraySlice(codePoints, pointer), ''))) {
+                     url.host = base.host;
+                     url.path = arraySlice(base.path);
+                     shortenURLsPath(url);
+                   }
+                   state = PATH;
+                   continue;
+                 }
+               } else {
+                 state = PATH;
+                 continue;
+               } break;
 
-           if (_notesEnabled) {
-             layerOn();
-           } else {
-             layerOff();
+             case FILE_SLASH:
+               if (chr == '/' || chr == '\\') {
+                 state = FILE_HOST;
+                 break;
+               }
+               if (base && base.scheme == 'file' && !startsWithWindowsDriveLetter(join(arraySlice(codePoints, pointer), ''))) {
+                 if (isWindowsDriveLetter(base.path[0], true)) push(url.path, base.path[0]);
+                 else url.host = base.host;
+               }
+               state = PATH;
+               continue;
 
-             if (context.selectedNoteID()) {
-               context.enter(modeBrowse(context));
-             }
-           }
+             case FILE_HOST:
+               if (chr == EOF || chr == '/' || chr == '\\' || chr == '?' || chr == '#') {
+                 if (!stateOverride && isWindowsDriveLetter(buffer)) {
+                   state = PATH;
+                 } else if (buffer == '') {
+                   url.host = '';
+                   if (stateOverride) return;
+                   state = PATH_START;
+                 } else {
+                   failure = parseHost(url, buffer);
+                   if (failure) return failure;
+                   if (url.host == 'localhost') url.host = '';
+                   if (stateOverride) return;
+                   buffer = '';
+                   state = PATH_START;
+                 } continue;
+               } else buffer += chr;
+               break;
 
-           dispatch$1.call('change');
-           return this;
-         };
+             case PATH_START:
+               if (isSpecial(url)) {
+                 state = PATH;
+                 if (chr != '/' && chr != '\\') continue;
+               } else if (!stateOverride && chr == '?') {
+                 url.query = '';
+                 state = QUERY;
+               } else if (!stateOverride && chr == '#') {
+                 url.fragment = '';
+                 state = FRAGMENT;
+               } else if (chr != EOF) {
+                 state = PATH;
+                 if (chr != '/') continue;
+               } break;
 
-         return drawNotes;
-       }
+             case PATH:
+               if (
+                 chr == EOF || chr == '/' ||
+                 (chr == '\\' && isSpecial(url)) ||
+                 (!stateOverride && (chr == '?' || chr == '#'))
+               ) {
+                 if (isDoubleDot(buffer)) {
+                   shortenURLsPath(url);
+                   if (chr != '/' && !(chr == '\\' && isSpecial(url))) {
+                     push(url.path, '');
+                   }
+                 } else if (isSingleDot(buffer)) {
+                   if (chr != '/' && !(chr == '\\' && isSpecial(url))) {
+                     push(url.path, '');
+                   }
+                 } else {
+                   if (url.scheme == 'file' && !url.path.length && isWindowsDriveLetter(buffer)) {
+                     if (url.host) url.host = '';
+                     buffer = charAt(buffer, 0) + ':'; // normalize windows drive letter
+                   }
+                   push(url.path, buffer);
+                 }
+                 buffer = '';
+                 if (url.scheme == 'file' && (chr == EOF || chr == '?' || chr == '#')) {
+                   while (url.path.length > 1 && url.path[0] === '') {
+                     shift(url.path);
+                   }
+                 }
+                 if (chr == '?') {
+                   url.query = '';
+                   state = QUERY;
+                 } else if (chr == '#') {
+                   url.fragment = '';
+                   state = FRAGMENT;
+                 }
+               } else {
+                 buffer += percentEncode(chr, pathPercentEncodeSet);
+               } break;
 
-       function svgTouch() {
-         function drawTouch(selection) {
-           selection.selectAll('.layer-touch').data(['areas', 'lines', 'points', 'turns', 'markers']).enter().append('g').attr('class', function (d) {
-             return 'layer-touch ' + d;
-           });
-         }
+             case CANNOT_BE_A_BASE_URL_PATH:
+               if (chr == '?') {
+                 url.query = '';
+                 state = QUERY;
+               } else if (chr == '#') {
+                 url.fragment = '';
+                 state = FRAGMENT;
+               } else if (chr != EOF) {
+                 url.path[0] += percentEncode(chr, C0ControlPercentEncodeSet);
+               } break;
 
-         return drawTouch;
-       }
+             case QUERY:
+               if (!stateOverride && chr == '#') {
+                 url.fragment = '';
+                 state = FRAGMENT;
+               } else if (chr != EOF) {
+                 if (chr == "'" && isSpecial(url)) url.query += '%27';
+                 else if (chr == '#') url.query += '%23';
+                 else url.query += percentEncode(chr, C0ControlPercentEncodeSet);
+               } break;
 
-       function refresh(selection, node) {
-         var cr = node.getBoundingClientRect();
-         var prop = [cr.width, cr.height];
-         selection.property('__dimensions__', prop);
-         return prop;
-       }
+             case FRAGMENT:
+               if (chr != EOF) url.fragment += percentEncode(chr, fragmentPercentEncodeSet);
+               break;
+           }
 
-       function utilGetDimensions(selection, force) {
-         if (!selection || selection.empty()) {
-           return [0, 0];
+           pointer++;
          }
+       };
 
-         var node = selection.node(),
-             cached = selection.property('__dimensions__');
-         return !cached || force ? refresh(selection, node) : cached;
-       }
-       function utilSetDimensions(selection, dimensions) {
-         if (!selection || selection.empty()) {
-           return selection;
+       // `URL` constructor
+       // https://url.spec.whatwg.org/#url-class
+       var URLConstructor = function URL(url /* , base */) {
+         var that = anInstance(this, URLPrototype);
+         var base = arguments.length > 1 ? arguments[1] : undefined;
+         var urlString = $toString(url);
+         var state = setInternalState(that, { type: 'URL' });
+         var baseState, failure;
+         if (base !== undefined) {
+           try {
+             baseState = getInternalURLState(base);
+           } catch (error) {
+             failure = parseURL(baseState = {}, $toString(base));
+             if (failure) throw TypeError$1(failure);
+           }
          }
-
-         var node = selection.node();
-
-         if (dimensions === null) {
-           refresh(selection, node);
-           return selection;
+         failure = parseURL(state, urlString, null, baseState);
+         if (failure) throw TypeError$1(failure);
+         var searchParams = state.searchParams = new URLSearchParams$1();
+         var searchParamsState = getInternalSearchParamsState(searchParams);
+         searchParamsState.updateSearchParams(state.query);
+         searchParamsState.updateURL = function () {
+           state.query = $toString(searchParams) || null;
+         };
+         if (!DESCRIPTORS) {
+           that.href = call(serializeURL, that);
+           that.origin = call(getOrigin, that);
+           that.protocol = call(getProtocol, that);
+           that.username = call(getUsername, that);
+           that.password = call(getPassword, that);
+           that.host = call(getHost, that);
+           that.hostname = call(getHostname, that);
+           that.port = call(getPort, that);
+           that.pathname = call(getPathname, that);
+           that.search = call(getSearch, that);
+           that.searchParams = call(getSearchParams, that);
+           that.hash = call(getHash, that);
          }
+       };
 
-         return selection.property('__dimensions__', [dimensions[0], dimensions[1]]).attr('width', dimensions[0]).attr('height', dimensions[1]);
-       }
+       var URLPrototype = URLConstructor.prototype;
 
-       function svgLayers(projection, context) {
-         var dispatch$1 = dispatch('change');
-         var svg = select(null);
-         var _layers = [{
-           id: 'osm',
-           layer: svgOsm(projection, context, dispatch$1)
-         }, {
-           id: 'notes',
-           layer: svgNotes(projection, context, dispatch$1)
-         }, {
-           id: 'data',
-           layer: svgData(projection, context, dispatch$1)
-         }, {
-           id: 'keepRight',
-           layer: svgKeepRight(projection, context, dispatch$1)
-         }, {
-           id: 'improveOSM',
-           layer: svgImproveOSM(projection, context, dispatch$1)
-         }, {
-           id: 'osmose',
-           layer: svgOsmose(projection, context, dispatch$1)
-         }, {
-           id: 'streetside',
-           layer: svgStreetside(projection, context, dispatch$1)
-         }, {
-           id: 'mapillary',
-           layer: svgMapillaryImages(projection, context, dispatch$1)
-         }, {
-           id: 'mapillary-position',
-           layer: svgMapillaryPosition(projection, context)
-         }, {
-           id: 'mapillary-map-features',
-           layer: svgMapillaryMapFeatures(projection, context, dispatch$1)
-         }, {
-           id: 'mapillary-signs',
-           layer: svgMapillarySigns(projection, context, dispatch$1)
-         }, {
-           id: 'openstreetcam',
-           layer: svgOpenstreetcamImages(projection, context, dispatch$1)
-         }, {
-           id: 'debug',
-           layer: svgDebug(projection, context)
-         }, {
-           id: 'geolocate',
-           layer: svgGeolocate(projection)
-         }, {
-           id: 'touch',
-           layer: svgTouch()
-         }];
+       var serializeURL = function () {
+         var url = getInternalURLState(this);
+         var scheme = url.scheme;
+         var username = url.username;
+         var password = url.password;
+         var host = url.host;
+         var port = url.port;
+         var path = url.path;
+         var query = url.query;
+         var fragment = url.fragment;
+         var output = scheme + ':';
+         if (host !== null) {
+           output += '//';
+           if (includesCredentials(url)) {
+             output += username + (password ? ':' + password : '') + '@';
+           }
+           output += serializeHost(host);
+           if (port !== null) output += ':' + port;
+         } else if (scheme == 'file') output += '//';
+         output += url.cannotBeABaseURL ? path[0] : path.length ? '/' + join(path, '/') : '';
+         if (query !== null) output += '?' + query;
+         if (fragment !== null) output += '#' + fragment;
+         return output;
+       };
 
-         function drawLayers(selection) {
-           svg = selection.selectAll('.surface').data([0]);
-           svg = svg.enter().append('svg').attr('class', 'surface').merge(svg);
-           var defs = svg.selectAll('.surface-defs').data([0]);
-           defs.enter().append('defs').attr('class', 'surface-defs');
-           var groups = svg.selectAll('.data-layer').data(_layers);
-           groups.exit().remove();
-           groups.enter().append('g').attr('class', function (d) {
-             return 'data-layer ' + d.id;
-           }).merge(groups).each(function (d) {
-             select(this).call(d.layer);
-           });
+       var getOrigin = function () {
+         var url = getInternalURLState(this);
+         var scheme = url.scheme;
+         var port = url.port;
+         if (scheme == 'blob') try {
+           return new URLConstructor(scheme.path[0]).origin;
+         } catch (error) {
+           return 'null';
          }
+         if (scheme == 'file' || !isSpecial(url)) return 'null';
+         return scheme + '://' + serializeHost(url.host) + (port !== null ? ':' + port : '');
+       };
 
-         drawLayers.all = function () {
-           return _layers;
-         };
-
-         drawLayers.layer = function (id) {
-           var obj = _layers.find(function (o) {
-             return o.id === id;
-           });
-
-           return obj && obj.layer;
-         };
-
-         drawLayers.only = function (what) {
-           var arr = [].concat(what);
-
-           var all = _layers.map(function (layer) {
-             return layer.id;
-           });
-
-           return drawLayers.remove(utilArrayDifference(all, arr));
-         };
+       var getProtocol = function () {
+         return getInternalURLState(this).scheme + ':';
+       };
 
-         drawLayers.remove = function (what) {
-           var arr = [].concat(what);
-           arr.forEach(function (id) {
-             _layers = _layers.filter(function (o) {
-               return o.id !== id;
-             });
-           });
-           dispatch$1.call('change');
-           return this;
-         };
+       var getUsername = function () {
+         return getInternalURLState(this).username;
+       };
 
-         drawLayers.add = function (what) {
-           var arr = [].concat(what);
-           arr.forEach(function (obj) {
-             if ('id' in obj && 'layer' in obj) {
-               _layers.push(obj);
-             }
-           });
-           dispatch$1.call('change');
-           return this;
-         };
+       var getPassword = function () {
+         return getInternalURLState(this).password;
+       };
 
-         drawLayers.dimensions = function (val) {
-           if (!arguments.length) return utilGetDimensions(svg);
-           utilSetDimensions(svg, val);
-           return this;
-         };
+       var getHost = function () {
+         var url = getInternalURLState(this);
+         var host = url.host;
+         var port = url.port;
+         return host === null ? ''
+           : port === null ? serializeHost(host)
+           : serializeHost(host) + ':' + port;
+       };
 
-         return utilRebind(drawLayers, dispatch$1, 'on');
-       }
+       var getHostname = function () {
+         var host = getInternalURLState(this).host;
+         return host === null ? '' : serializeHost(host);
+       };
 
-       function svgLines(projection, context) {
-         var detected = utilDetect();
-         var highway_stack = {
-           motorway: 0,
-           motorway_link: 1,
-           trunk: 2,
-           trunk_link: 3,
-           primary: 4,
-           primary_link: 5,
-           secondary: 6,
-           tertiary: 7,
-           unclassified: 8,
-           residential: 9,
-           service: 10,
-           footway: 11
-         };
+       var getPort = function () {
+         var port = getInternalURLState(this).port;
+         return port === null ? '' : $toString(port);
+       };
 
-         function drawTargets(selection, graph, entities, filter) {
-           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-           var getPath = svgPath(projection).geojson;
-           var activeID = context.activeID();
-           var base = context.history().base(); // The targets and nopes will be MultiLineString sub-segments of the ways
+       var getPathname = function () {
+         var url = getInternalURLState(this);
+         var path = url.path;
+         return url.cannotBeABaseURL ? path[0] : path.length ? '/' + join(path, '/') : '';
+       };
 
-           var data = {
-             targets: [],
-             nopes: []
-           };
-           entities.forEach(function (way) {
-             var features = svgSegmentWay(way, graph, activeID);
-             data.targets.push.apply(data.targets, features.passive);
-             data.nopes.push.apply(data.nopes, features.active);
-           }); // Targets allow hover and vertex snapping
+       var getSearch = function () {
+         var query = getInternalURLState(this).query;
+         return query ? '?' + query : '';
+       };
 
-           var targetData = data.targets.filter(getPath);
-           var targets = selection.selectAll('.line.target-allowed').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(targetData, function key(d) {
-             return d.id;
-           }); // exit
+       var getSearchParams = function () {
+         return getInternalURLState(this).searchParams;
+       };
 
-           targets.exit().remove();
+       var getHash = function () {
+         var fragment = getInternalURLState(this).fragment;
+         return fragment ? '#' + fragment : '';
+       };
 
-           var segmentWasEdited = function segmentWasEdited(d) {
-             var wayID = d.properties.entity.id; // if the whole line was edited, don't draw segment changes
+       var accessorDescriptor = function (getter, setter) {
+         return { get: getter, set: setter, configurable: true, enumerable: true };
+       };
 
-             if (!base.entities[wayID] || !fastDeepEqual(graph.entities[wayID].nodes, base.entities[wayID].nodes)) {
-               return false;
+       if (DESCRIPTORS) {
+         defineProperties(URLPrototype, {
+           // `URL.prototype.href` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-href
+           href: accessorDescriptor(serializeURL, function (href) {
+             var url = getInternalURLState(this);
+             var urlString = $toString(href);
+             var failure = parseURL(url, urlString);
+             if (failure) throw TypeError$1(failure);
+             getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
+           }),
+           // `URL.prototype.origin` getter
+           // https://url.spec.whatwg.org/#dom-url-origin
+           origin: accessorDescriptor(getOrigin),
+           // `URL.prototype.protocol` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-protocol
+           protocol: accessorDescriptor(getProtocol, function (protocol) {
+             var url = getInternalURLState(this);
+             parseURL(url, $toString(protocol) + ':', SCHEME_START);
+           }),
+           // `URL.prototype.username` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-username
+           username: accessorDescriptor(getUsername, function (username) {
+             var url = getInternalURLState(this);
+             var codePoints = arrayFrom($toString(username));
+             if (cannotHaveUsernamePasswordPort(url)) return;
+             url.username = '';
+             for (var i = 0; i < codePoints.length; i++) {
+               url.username += percentEncode(codePoints[i], userinfoPercentEncodeSet);
              }
-
-             return d.properties.nodes.some(function (n) {
-               return !base.entities[n.id] || !fastDeepEqual(graph.entities[n.id].loc, base.entities[n.id].loc);
-             });
-           }; // enter/update
-
-
-           targets.enter().append('path').merge(targets).attr('d', getPath).attr('class', function (d) {
-             return 'way line target target-allowed ' + targetClass + d.id;
-           }).classed('segment-edited', segmentWasEdited); // NOPE
-
-           var nopeData = data.nopes.filter(getPath);
-           var nopes = selection.selectAll('.line.target-nope').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(nopeData, function key(d) {
-             return d.id;
-           }); // exit
-
-           nopes.exit().remove(); // enter/update
-
-           nopes.enter().append('path').merge(nopes).attr('d', getPath).attr('class', function (d) {
-             return 'way line target target-nope ' + nopeClass + d.id;
-           }).classed('segment-edited', segmentWasEdited);
-         }
-
-         function drawLines(selection, graph, entities, filter) {
-           var base = context.history().base();
-
-           function waystack(a, b) {
-             var selected = context.selectedIDs();
-             var scoreA = selected.indexOf(a.id) !== -1 ? 20 : 0;
-             var scoreB = selected.indexOf(b.id) !== -1 ? 20 : 0;
-
-             if (a.tags.highway) {
-               scoreA -= highway_stack[a.tags.highway];
+           }),
+           // `URL.prototype.password` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-password
+           password: accessorDescriptor(getPassword, function (password) {
+             var url = getInternalURLState(this);
+             var codePoints = arrayFrom($toString(password));
+             if (cannotHaveUsernamePasswordPort(url)) return;
+             url.password = '';
+             for (var i = 0; i < codePoints.length; i++) {
+               url.password += percentEncode(codePoints[i], userinfoPercentEncodeSet);
              }
-
-             if (b.tags.highway) {
-               scoreB -= highway_stack[b.tags.highway];
+           }),
+           // `URL.prototype.host` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-host
+           host: accessorDescriptor(getHost, function (host) {
+             var url = getInternalURLState(this);
+             if (url.cannotBeABaseURL) return;
+             parseURL(url, $toString(host), HOST);
+           }),
+           // `URL.prototype.hostname` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-hostname
+           hostname: accessorDescriptor(getHostname, function (hostname) {
+             var url = getInternalURLState(this);
+             if (url.cannotBeABaseURL) return;
+             parseURL(url, $toString(hostname), HOSTNAME);
+           }),
+           // `URL.prototype.port` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-port
+           port: accessorDescriptor(getPort, function (port) {
+             var url = getInternalURLState(this);
+             if (cannotHaveUsernamePasswordPort(url)) return;
+             port = $toString(port);
+             if (port == '') url.port = null;
+             else parseURL(url, port, PORT);
+           }),
+           // `URL.prototype.pathname` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-pathname
+           pathname: accessorDescriptor(getPathname, function (pathname) {
+             var url = getInternalURLState(this);
+             if (url.cannotBeABaseURL) return;
+             url.path = [];
+             parseURL(url, $toString(pathname), PATH_START);
+           }),
+           // `URL.prototype.search` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-search
+           search: accessorDescriptor(getSearch, function (search) {
+             var url = getInternalURLState(this);
+             search = $toString(search);
+             if (search == '') {
+               url.query = null;
+             } else {
+               if ('?' == charAt(search, 0)) search = stringSlice(search, 1);
+               url.query = '';
+               parseURL(url, search, QUERY);
              }
+             getInternalSearchParamsState(url.searchParams).updateSearchParams(url.query);
+           }),
+           // `URL.prototype.searchParams` getter
+           // https://url.spec.whatwg.org/#dom-url-searchparams
+           searchParams: accessorDescriptor(getSearchParams),
+           // `URL.prototype.hash` accessors pair
+           // https://url.spec.whatwg.org/#dom-url-hash
+           hash: accessorDescriptor(getHash, function (hash) {
+             var url = getInternalURLState(this);
+             hash = $toString(hash);
+             if (hash == '') {
+               url.fragment = null;
+               return;
+             }
+             if ('#' == charAt(hash, 0)) hash = stringSlice(hash, 1);
+             url.fragment = '';
+             parseURL(url, hash, FRAGMENT);
+           })
+         });
+       }
 
-             return scoreA - scoreB;
-           }
-
-           function drawLineGroup(selection, klass, isSelected) {
-             // Note: Don't add `.selected` class in draw modes
-             var mode = context.mode();
-             var isDrawing = mode && /^draw/.test(mode.id);
-             var selectedClass = !isDrawing && isSelected ? 'selected ' : '';
-             var lines = selection.selectAll('path').filter(filter).data(getPathData(isSelected), osmEntity.key);
-             lines.exit().remove(); // Optimization: Call expensive TagClasses only on enter selection. This
-             // works because osmEntity.key is defined to include the entity v attribute.
-
-             lines.enter().append('path').attr('class', function (d) {
-               var prefix = 'way line'; // if this line isn't styled by its own tags
-
-               if (!d.hasInterestingTags()) {
-                 var parentRelations = graph.parentRelations(d);
-                 var parentMultipolygons = parentRelations.filter(function (relation) {
-                   return relation.isMultipolygon();
-                 }); // and if it's a member of at least one multipolygon relation
-
-                 if (parentMultipolygons.length > 0 && // and only multipolygon relations
-                 parentRelations.length === parentMultipolygons.length) {
-                   // then fudge the classes to style this as an area edge
-                   prefix = 'relation area';
-                 }
-               }
-
-               var oldMPClass = oldMultiPolygonOuters[d.id] ? 'old-multipolygon ' : '';
-               return prefix + ' ' + klass + ' ' + selectedClass + oldMPClass + d.id;
-             }).classed('added', function (d) {
-               return !base.entities[d.id];
-             }).classed('geometry-edited', function (d) {
-               return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].nodes, base.entities[d.id].nodes);
-             }).classed('retagged', function (d) {
-               return graph.entities[d.id] && base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-             }).call(svgTagClasses()).merge(lines).sort(waystack).attr('d', getPath).call(svgTagClasses().tags(svgRelationMemberTags(graph)));
-             return selection;
-           }
+       // `URL.prototype.toJSON` method
+       // https://url.spec.whatwg.org/#dom-url-tojson
+       redefine(URLPrototype, 'toJSON', function toJSON() {
+         return call(serializeURL, this);
+       }, { enumerable: true });
 
-           function getPathData(isSelected) {
-             return function () {
-               var layer = this.parentNode.__data__;
-               var data = pathdata[layer] || [];
-               return data.filter(function (d) {
-                 if (isSelected) return context.selectedIDs().indexOf(d.id) !== -1;else return context.selectedIDs().indexOf(d.id) === -1;
-               });
-             };
-           }
+       // `URL.prototype.toString` method
+       // https://url.spec.whatwg.org/#URL-stringification-behavior
+       redefine(URLPrototype, 'toString', function toString() {
+         return call(serializeURL, this);
+       }, { enumerable: true });
 
-           function addMarkers(layergroup, pathclass, groupclass, groupdata, marker) {
-             var markergroup = layergroup.selectAll('g.' + groupclass).data([pathclass]);
-             markergroup = markergroup.enter().append('g').attr('class', groupclass).merge(markergroup);
-             var markers = markergroup.selectAll('path').filter(filter).data(function data() {
-               return groupdata[this.parentNode.__data__] || [];
-             }, function key(d) {
-               return [d.id, d.index];
-             });
-             markers.exit().remove();
-             markers = markers.enter().append('path').attr('class', pathclass).merge(markers).attr('marker-mid', marker).attr('d', function (d) {
-               return d.d;
-             });
+       if (NativeURL) {
+         var nativeCreateObjectURL = NativeURL.createObjectURL;
+         var nativeRevokeObjectURL = NativeURL.revokeObjectURL;
+         // `URL.createObjectURL` method
+         // https://developer.mozilla.org/en-US/docs/Web/API/URL/createObjectURL
+         if (nativeCreateObjectURL) redefine(URLConstructor, 'createObjectURL', bind$2(nativeCreateObjectURL, NativeURL));
+         // `URL.revokeObjectURL` method
+         // https://developer.mozilla.org/en-US/docs/Web/API/URL/revokeObjectURL
+         if (nativeRevokeObjectURL) redefine(URLConstructor, 'revokeObjectURL', bind$2(nativeRevokeObjectURL, NativeURL));
+       }
 
-             if (detected.ie) {
-               markers.each(function () {
-                 this.parentNode.insertBefore(this, this);
-               });
-             }
-           }
+       setToStringTag(URLConstructor, 'URL');
 
-           var getPath = svgPath(projection, graph);
-           var ways = [];
-           var onewaydata = {};
-           var sideddata = {};
-           var oldMultiPolygonOuters = {};
+       $({ global: true, forced: !USE_NATIVE_URL, sham: !DESCRIPTORS }, {
+         URL: URLConstructor
+       });
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             var outer = osmOldMultipolygonOuterMember(entity, graph);
+       function uiFieldText(field, context) {
+         var dispatch = dispatch$8('change');
+         var input = select(null);
+         var outlinkButton = select(null);
+         var wrap = select(null);
+         var _entityIDs = [];
 
-             if (outer) {
-               ways.push(entity.mergeTags(outer.tags));
-               oldMultiPolygonOuters[outer.id] = true;
-             } else if (entity.geometry(graph) === 'line') {
-               ways.push(entity);
-             }
-           }
+         var _tags;
 
-           ways = ways.filter(getPath);
-           var pathdata = utilArrayGroupBy(ways, function (way) {
-             return way.layer();
-           });
-           Object.keys(pathdata).forEach(function (k) {
-             var v = pathdata[k];
-             var onewayArr = v.filter(function (d) {
-               return d.isOneWay();
-             });
-             var onewaySegments = svgMarkerSegments(projection, graph, 35, function shouldReverse(entity) {
-               return entity.tags.oneway === '-1';
-             }, function bothDirections(entity) {
-               return entity.tags.oneway === 'reversible' || entity.tags.oneway === 'alternating';
-             });
-             onewaydata[k] = utilArrayFlatten(onewayArr.map(onewaySegments));
-             var sidedArr = v.filter(function (d) {
-               return d.isSided();
-             });
-             var sidedSegments = svgMarkerSegments(projection, graph, 30, function shouldReverse() {
-               return false;
-             }, function bothDirections() {
-               return false;
-             });
-             sideddata[k] = utilArrayFlatten(sidedArr.map(sidedSegments));
+         var _phoneFormats = {};
+
+         if (field.type === 'tel') {
+           _mainFileFetcher.get('phone_formats').then(function (d) {
+             _phoneFormats = d;
+             updatePhonePlaceholder();
+           })["catch"](function () {
+             /* ignore */
            });
-           var covered = selection.selectAll('.layer-osm.covered'); // under areas
+         }
 
-           var uncovered = selection.selectAll('.layer-osm.lines'); // over areas
+         function calcLocked() {
+           // Protect certain fields that have a companion `*:wikidata` value
+           var isLocked = (field.id === 'brand' || field.id === 'network' || field.id === 'operator' || field.id === 'flag') && _entityIDs.length && _entityIDs.some(function (entityID) {
+             var entity = context.graph().hasEntity(entityID);
+             if (!entity) return false; // Features linked to Wikidata are likely important and should be protected
 
-           var touchLayer = selection.selectAll('.layer-touch.lines'); // Draw lines..
+             if (entity.tags.wikidata) return true;
+             var preset = _mainPresetIndex.match(entity, context.graph());
+             var isSuggestion = preset && preset.suggestion; // Lock the field if there is a value and a companion `*:wikidata` value
 
-           [covered, uncovered].forEach(function (selection) {
-             var range$1 = selection === covered ? range(-10, 0) : range(0, 11);
-             var layergroup = selection.selectAll('g.layergroup').data(range$1);
-             layergroup = layergroup.enter().append('g').attr('class', function (d) {
-               return 'layergroup layer' + String(d);
-             }).merge(layergroup);
-             layergroup.selectAll('g.linegroup').data(['shadow', 'casing', 'stroke', 'shadow-highlighted', 'casing-highlighted', 'stroke-highlighted']).enter().append('g').attr('class', function (d) {
-               return 'linegroup line-' + d;
-             });
-             layergroup.selectAll('g.line-shadow').call(drawLineGroup, 'shadow', false);
-             layergroup.selectAll('g.line-casing').call(drawLineGroup, 'casing', false);
-             layergroup.selectAll('g.line-stroke').call(drawLineGroup, 'stroke', false);
-             layergroup.selectAll('g.line-shadow-highlighted').call(drawLineGroup, 'shadow', true);
-             layergroup.selectAll('g.line-casing-highlighted').call(drawLineGroup, 'casing', true);
-             layergroup.selectAll('g.line-stroke-highlighted').call(drawLineGroup, 'stroke', true);
-             addMarkers(layergroup, 'oneway', 'onewaygroup', onewaydata, 'url(#ideditor-oneway-marker)');
-             addMarkers(layergroup, 'sided', 'sidedgroup', sideddata, function marker(d) {
-               var category = graph.entity(d.id).sidednessIdentifier();
-               return 'url(#ideditor-sided-marker-' + category + ')';
-             });
-           }); // Draw touch targets..
+             var which = field.id; // 'brand', 'network', 'operator', 'flag'
 
-           touchLayer.call(drawTargets, graph, ways, filter);
+             return isSuggestion && !!entity.tags[which] && !!entity.tags[which + ':wikidata'];
+           });
+
+           field.locked(isLocked);
          }
 
-         return drawLines;
-       }
+         function i(selection) {
+           calcLocked();
+           var isLocked = field.locked();
+           wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('input').data([0]);
+           input = input.enter().append('input').attr('type', field.type === 'identifier' ? 'text' : field.type).attr('id', field.domId).classed(field.type, true).call(utilNoAuto).merge(input);
+           input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
 
-       function svgMidpoints(projection, context) {
-         var targetRadius = 8;
+           if (field.type === 'tel') {
+             updatePhonePlaceholder();
+           } else if (field.type === 'number') {
+             var rtl = _mainLocalizer.textDirection() === 'rtl';
+             input.attr('type', 'text');
+             var inc = field.increment;
+             var buttons = wrap.selectAll('.increment, .decrement').data(rtl ? [inc, -inc] : [-inc, inc]);
+             buttons.enter().append('button').attr('class', function (d) {
+               var which = d > 0 ? 'increment' : 'decrement';
+               return 'form-field-button ' + which;
+             }).attr('title', function (d) {
+               var which = d > 0 ? 'increment' : 'decrement';
+               return _t("inspector.".concat(which));
+             }).merge(buttons).on('click', function (d3_event, d) {
+               d3_event.preventDefault();
+               var raw_vals = input.node().value || '0';
+               var vals = raw_vals.split(';');
+               vals = vals.map(function (v) {
+                 var num = parseFloat(v.trim(), 10);
+                 return isFinite(num) ? clamped(num + d) : v.trim();
+               });
+               input.node().value = vals.join(';');
+               change()();
+             });
+           } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
+             input.attr('type', 'text');
+             outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+             outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+               var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
 
-         function drawTargets(selection, graph, entities, filter) {
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var getTransform = svgPointTransform(projection).geojson;
-           var data = entities.map(function (midpoint) {
-             return {
-               type: 'Feature',
-               id: midpoint.id,
-               properties: {
-                 target: true,
-                 entity: midpoint
-               },
-               geometry: {
-                 type: 'Point',
-                 coordinates: midpoint.loc
+               if (domainResults.length >= 2 && domainResults[1]) {
+                 var domain = domainResults[1];
+                 return _t('icons.view_on', {
+                   domain: domain
+                 });
                }
-             };
-           });
-           var targets = selection.selectAll('.midpoint.target').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(data, function key(d) {
-             return d.id;
-           }); // exit
 
-           targets.exit().remove(); // enter/update
+               return '';
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               var value = validIdentifierValueForLink();
 
-           targets.enter().append('circle').attr('r', targetRadius).merge(targets).attr('class', function (d) {
-             return 'node midpoint target ' + fillClass + d.id;
-           }).attr('transform', getTransform);
+               if (value) {
+                 var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
+                 window.open(url, '_blank');
+               }
+             }).merge(outlinkButton);
+           } else if (field.type === 'url') {
+             input.attr('type', 'text');
+             outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
+             outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
+               return _t('icons.visit_website');
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               var value = validIdentifierValueForLink();
+               if (value) window.open(value, '_blank');
+             }).merge(outlinkButton);
+           } else if (field.key.split(':').includes('colour')) {
+             input.attr('type', 'text');
+             updateColourPreview();
+           }
          }
 
-         function drawMidpoints(selection, graph, entities, filter, extent) {
-           var drawLayer = selection.selectAll('.layer-osm.points .points-group.midpoints');
-           var touchLayer = selection.selectAll('.layer-touch.points');
-           var mode = context.mode();
-
-           if (mode && mode.id !== 'select' || !context.map().withinEditableZoom()) {
-             drawLayer.selectAll('.midpoint').remove();
-             touchLayer.selectAll('.midpoint.target').remove();
-             return;
+         function isColourValid(colour) {
+           if (!colour.match(/^(#([0-9a-fA-F]{3}){1,2}|\w+)$/)) {
+             // OSM only supports hex or named colors
+             return false;
+           } else if (!CSS.supports('color', colour) || ['unset', 'inherit', 'initial', 'revert'].includes(colour)) {
+             // see https://stackoverflow.com/a/68217760/1627467
+             return false;
            }
 
-           var poly = extent.polygon();
-           var midpoints = {};
+           return true;
+         }
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             if (entity.type !== 'way') continue;
-             if (!filter(entity)) continue;
-             if (context.selectedIDs().indexOf(entity.id) < 0) continue;
-             var nodes = graph.childNodes(entity);
+         function updateColourPreview() {
+           wrap.selectAll('.colour-preview').remove();
+           var colour = utilGetSetValue(input);
+           if (!isColourValid(colour) && colour !== '') return;
+           var colourSelector = wrap.selectAll('.colour-selector').data([0]);
+           outlinkButton = wrap.selectAll('.colour-preview').data([colour]);
+           colourSelector.enter().append('input').attr('type', 'color').attr('class', 'form-field-button colour-selector').attr('value', colour).on('input', debounce(function (d3_event) {
+             d3_event.preventDefault();
+             var colour = this.value;
+             if (!isColourValid(colour)) return;
+             utilGetSetValue(input, this.value);
+             change()();
+             updateColourPreview();
+           }, 100));
+           outlinkButton = outlinkButton.enter().append('div').attr('class', 'form-field-button colour-preview').append('div').style('background-color', function (d) {
+             return d;
+           }).attr('class', 'colour-box');
 
-             for (var j = 0; j < nodes.length - 1; j++) {
-               var a = nodes[j];
-               var b = nodes[j + 1];
-               var id = [a.id, b.id].sort().join('-');
+           if (colour === '') {
+             outlinkButton = outlinkButton.call(svgIcon('#iD-icon-edit'));
+           }
 
-               if (midpoints[id]) {
-                 midpoints[id].parents.push(entity);
-               } else if (geoVecLength(projection(a.loc), projection(b.loc)) > 40) {
-                 var point = geoVecInterp(a.loc, b.loc, 0.5);
-                 var loc = null;
+           outlinkButton.on('click', function () {
+             return wrap.select('.colour-selector').node().click();
+           }).merge(outlinkButton);
+         }
 
-                 if (extent.intersects(point)) {
-                   loc = point;
-                 } else {
-                   for (var k = 0; k < 4; k++) {
-                     point = geoLineIntersection([a.loc, b.loc], [poly[k], poly[k + 1]]);
+         function updatePhonePlaceholder() {
+           if (input.empty() || !Object.keys(_phoneFormats).length) return;
+           var extent = combinedEntityExtent();
+           var countryCode = extent && iso1A2Code(extent.center());
 
-                     if (point && geoVecLength(projection(a.loc), projection(point)) > 20 && geoVecLength(projection(b.loc), projection(point)) > 20) {
-                       loc = point;
-                       break;
-                     }
-                   }
-                 }
+           var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
 
-                 if (loc) {
-                   midpoints[id] = {
-                     type: 'midpoint',
-                     id: id,
-                     loc: loc,
-                     edge: [a.id, b.id],
-                     parents: [entity]
-                   };
-                 }
-               }
-             }
-           }
+           if (format) input.attr('placeholder', format);
+         }
 
-           function midpointFilter(d) {
-             if (midpoints[d.id]) return true;
+         function validIdentifierValueForLink() {
+           var value = utilGetSetValue(input).trim();
 
-             for (var i = 0; i < d.parents.length; i++) {
-               if (filter(d.parents[i])) {
-                 return true;
-               }
+           if (field.type === 'url' && value) {
+             try {
+               return new URL(value).href;
+             } catch (e) {
+               return null;
              }
+           }
 
-             return false;
+           if (field.type === 'identifier' && field.pattern) {
+             return value && value.match(new RegExp(field.pattern))[0];
            }
 
-           var groups = drawLayer.selectAll('.midpoint').filter(midpointFilter).data(Object.values(midpoints), function (d) {
-             return d.id;
-           });
-           groups.exit().remove();
-           var enter = groups.enter().insert('g', ':first-child').attr('class', 'midpoint');
-           enter.append('polygon').attr('points', '-6,8 10,0 -6,-8').attr('class', 'shadow');
-           enter.append('polygon').attr('points', '-3,4 5,0 -3,-4').attr('class', 'fill');
-           groups = groups.merge(enter).attr('transform', function (d) {
-             var translate = svgPointTransform(projection);
-             var a = graph.entity(d.edge[0]);
-             var b = graph.entity(d.edge[1]);
-             var angle = geoAngle(a, b, projection) * (180 / Math.PI);
-             return translate(d) + ' rotate(' + angle + ')';
-           }).call(svgTagClasses().tags(function (d) {
-             return d.parents[0].tags;
-           })); // Propagate data bindings.
+           return null;
+         } // clamp number to min/max
 
-           groups.select('polygon.shadow');
-           groups.select('polygon.fill'); // Draw touch targets..
 
-           touchLayer.call(drawTargets, graph, Object.values(midpoints), midpointFilter);
+         function clamped(num) {
+           if (field.minValue !== undefined) {
+             num = Math.max(num, field.minValue);
+           }
+
+           if (field.maxValue !== undefined) {
+             num = Math.min(num, field.maxValue);
+           }
+
+           return num;
          }
 
-         return drawMidpoints;
-       }
+         function change(onInput) {
+           return function () {
+             var t = {};
+             var val = utilGetSetValue(input);
+             if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-       function svgPoints(projection, context) {
-         function markerPath(selection, klass) {
-           selection.attr('class', klass).attr('transform', 'translate(-8, -23)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+             if (!val && Array.isArray(_tags[field.key])) return;
+
+             if (!onInput) {
+               if (field.type === 'number' && val) {
+                 var vals = val.split(';');
+                 vals = vals.map(function (v) {
+                   var num = parseFloat(v.trim(), 10);
+                   return isFinite(num) ? clamped(num) : v.trim();
+                 });
+                 val = vals.join(';');
+               }
+
+               utilGetSetValue(input, val);
+             }
+
+             t[field.key] = val || undefined;
+             dispatch.call('change', this, t, onInput);
+           };
          }
 
-         function sortY(a, b) {
-           return b.loc[1] - a.loc[1];
-         } // Avoid exit/enter if we're just moving stuff around.
-         // The node will get a new version but we only need to run the update selection.
+         i.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return i;
+         };
 
+         i.tags = function (tags) {
+           _tags = tags;
+           var isMixed = Array.isArray(tags[field.key]);
+           utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
+           if (field.key.split(':').includes('colour')) updateColourPreview();
 
-         function fastEntityKey(d) {
-           var mode = context.mode();
-           var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-           return isMoving ? d.id : osmEntity.key(d);
+           if (outlinkButton && !outlinkButton.empty()) {
+             var disabled = !validIdentifierValueForLink();
+             outlinkButton.classed('disabled', disabled);
+           }
+         };
+
+         i.focus = function () {
+           var node = input.node();
+           if (node) node.focus();
+         };
+
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
          }
 
-         function drawTargets(selection, graph, entities, filter) {
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var getTransform = svgPointTransform(projection).geojson;
-           var activeID = context.activeID();
-           var data = [];
-           entities.forEach(function (node) {
-             if (activeID === node.id) return; // draw no target on the activeID
+         return utilRebind(i, dispatch, 'on');
+       }
 
-             data.push({
-               type: 'Feature',
-               id: node.id,
-               properties: {
-                 target: true,
-                 entity: node
-               },
-               geometry: node.asGeoJSON()
-             });
+       function uiFieldAccess(field, context) {
+         var dispatch = dispatch$8('change');
+         var items = select(null);
+
+         var _tags;
+
+         function access(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var list = wrap.selectAll('ul').data([0]);
+           list = list.enter().append('ul').attr('class', 'rows').merge(list);
+           items = list.selectAll('li').data(field.keys); // Enter
+
+           var enter = items.enter().append('li').attr('class', function (d) {
+             return 'labeled-input preset-access-' + d;
            });
-           var targets = selection.selectAll('.point.target').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(data, function key(d) {
-             return d.id;
-           }); // exit
+           enter.append('span').attr('class', 'label preset-label-access').attr('for', function (d) {
+             return 'preset-input-access-' + d;
+           }).html(function (d) {
+             return field.t.html('types.' + d);
+           });
+           enter.append('div').attr('class', 'preset-input-access-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+             return 'preset-input-access preset-input-access-' + d;
+           }).call(utilNoAuto).each(function (d) {
+             select(this).call(uiCombobox(context, 'access-' + d).data(access.options(d)));
+           }); // Update
 
-           targets.exit().remove(); // enter/update
+           items = items.merge(enter);
+           wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
+         }
 
-           targets.enter().append('rect').attr('x', -10).attr('y', -26).attr('width', 20).attr('height', 30).merge(targets).attr('class', function (d) {
-             return 'node point target ' + fillClass + d.id;
-           }).attr('transform', getTransform);
+         function change(d3_event, d) {
+           var tag = {};
+           var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
+
+           if (!value && typeof _tags[d] !== 'string') return;
+           tag[d] = value || undefined;
+           dispatch.call('change', this, tag);
          }
 
-         function drawPoints(selection, graph, entities, filter) {
-           var wireframe = context.surface().classed('fill-wireframe');
-           var zoom = geoScaleToZoom(projection.scale());
-           var base = context.history().base(); // Points with a direction will render as vertices at higher zooms..
+         access.options = function (type) {
+           var options = ['no', 'permissive', 'private', 'permit', 'destination', 'customers', 'unknown'];
 
-           function renderAsPoint(entity) {
-             return entity.geometry(graph) === 'point' && !(zoom >= 18 && entity.directions(graph, projection).length);
-           } // All points will render as vertices in wireframe mode too..
+           if (type !== 'access') {
+             options.unshift('yes');
+             options.push('designated');
+
+             if (type === 'bicycle') {
+               options.push('dismount');
+             }
+           }
+
+           return options.map(function (option) {
+             return {
+               title: field.t('options.' + option + '.description'),
+               value: option
+             };
+           });
+         };
 
+         var placeholdersByHighway = {
+           footway: {
+             foot: 'designated',
+             motor_vehicle: 'no'
+           },
+           steps: {
+             foot: 'yes',
+             motor_vehicle: 'no',
+             bicycle: 'no',
+             horse: 'no'
+           },
+           pedestrian: {
+             foot: 'yes',
+             motor_vehicle: 'no'
+           },
+           cycleway: {
+             motor_vehicle: 'no',
+             bicycle: 'designated'
+           },
+           bridleway: {
+             motor_vehicle: 'no',
+             horse: 'designated'
+           },
+           path: {
+             foot: 'yes',
+             motor_vehicle: 'no',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           motorway: {
+             foot: 'no',
+             motor_vehicle: 'yes',
+             bicycle: 'no',
+             horse: 'no'
+           },
+           trunk: {
+             motor_vehicle: 'yes'
+           },
+           primary: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           secondary: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           tertiary: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           residential: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           unclassified: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           service: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           motorway_link: {
+             foot: 'no',
+             motor_vehicle: 'yes',
+             bicycle: 'no',
+             horse: 'no'
+           },
+           trunk_link: {
+             motor_vehicle: 'yes'
+           },
+           primary_link: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           secondary_link: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           },
+           tertiary_link: {
+             foot: 'yes',
+             motor_vehicle: 'yes',
+             bicycle: 'yes',
+             horse: 'yes'
+           }
+         };
 
-           var points = wireframe ? [] : entities.filter(renderAsPoint);
-           points.sort(sortY);
-           var drawLayer = selection.selectAll('.layer-osm.points .points-group.points');
-           var touchLayer = selection.selectAll('.layer-touch.points'); // Draw points..
+         access.tags = function (tags) {
+           _tags = tags;
+           utilGetSetValue(items.selectAll('.preset-input-access'), function (d) {
+             return typeof tags[d] === 'string' ? tags[d] : '';
+           }).classed('mixed', function (d) {
+             return tags[d] && Array.isArray(tags[d]);
+           }).attr('title', function (d) {
+             return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
+           }).attr('placeholder', function (d) {
+             if (tags[d] && Array.isArray(tags[d])) {
+               return _t('inspector.multiple_values');
+             }
 
-           var groups = drawLayer.selectAll('g.point').filter(filter).data(points, fastEntityKey);
-           groups.exit().remove();
-           var enter = groups.enter().append('g').attr('class', function (d) {
-             return 'node point ' + d.id;
-           }).order();
-           enter.append('path').call(markerPath, 'shadow');
-           enter.append('ellipse').attr('cx', 0.5).attr('cy', 1).attr('rx', 6.5).attr('ry', 3).attr('class', 'stroke');
-           enter.append('path').call(markerPath, 'stroke');
-           enter.append('use').attr('transform', 'translate(-5, -19)').attr('class', 'icon').attr('width', '11px').attr('height', '11px');
-           groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('added', function (d) {
-             return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-           }).classed('moved', function (d) {
-             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-           }).classed('retagged', function (d) {
-             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-           }).call(svgTagClasses());
-           groups.select('.shadow'); // propagate bound data
+             if (d === 'access') {
+               return 'yes';
+             }
 
-           groups.select('.stroke'); // propagate bound data
+             if (tags.access && typeof tags.access === 'string') {
+               return tags.access;
+             }
 
-           groups.select('.icon') // propagate bound data
-           .attr('xlink:href', function (entity) {
-             var preset = _mainPresetIndex.match(entity, graph);
-             var picon = preset && preset.icon;
+             if (tags.highway) {
+               if (typeof tags.highway === 'string') {
+                 if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
+                   return placeholdersByHighway[tags.highway][d];
+                 }
+               } else {
+                 var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
+                   return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
+                 }).filter(Boolean);
 
-             if (!picon) {
-               return '';
-             } else {
-               var isMaki = /^maki-/.test(picon);
-               return '#' + picon + (isMaki ? '-11' : '');
+                 if (impliedAccesses.length === tags.highway.length && new Set(impliedAccesses).size === 1) {
+                   // if all the highway values have the same implied access for this type then use that
+                   return impliedAccesses[0];
+                 }
+               }
              }
-           }); // Draw touch targets..
 
-           touchLayer.call(drawTargets, graph, points, filter);
-         }
+             return field.placeholder();
+           });
+         };
 
-         return drawPoints;
-       }
+         access.focus = function () {
+           items.selectAll('.preset-input-access').node().focus();
+         };
 
-       function svgTurns(projection, context) {
-         function icon(turn) {
-           var u = turn.u ? '-u' : '';
-           if (turn.no) return '#iD-turn-no' + u;
-           if (turn.only) return '#iD-turn-only' + u;
-           return '#iD-turn-yes' + u;
-         }
+         return utilRebind(access, dispatch, 'on');
+       }
 
-         function drawTurns(selection, graph, turns) {
-           function turnTransform(d) {
-             var pxRadius = 50;
-             var toWay = graph.entity(d.to.way);
-             var toPoints = graph.childNodes(toWay).map(function (n) {
-               return n.loc;
-             }).map(projection);
-             var toLength = geoPathLength(toPoints);
-             var mid = toLength / 2; // midpoint of destination way
+       function uiFieldAddress(field, context) {
+         var dispatch = dispatch$8('change');
 
-             var toNode = graph.entity(d.to.node);
-             var toVertex = graph.entity(d.to.vertex);
-             var a = geoAngle(toVertex, toNode, projection);
-             var o = projection(toVertex.loc);
-             var r = d.u ? 0 // u-turn: no radius
-             : !toWay.__via ? pxRadius // leaf way: put marker at pxRadius
-             : Math.min(mid, pxRadius); // via way: prefer pxRadius, fallback to mid for very short ways
+         var _selection = select(null);
 
-             return 'translate(' + (r * Math.cos(a) + o[0]) + ',' + (r * Math.sin(a) + o[1]) + ') ' + 'rotate(' + a * 180 / Math.PI + ')';
-           }
+         var _wrap = select(null);
 
-           var drawLayer = selection.selectAll('.layer-osm.points .points-group.turns');
-           var touchLayer = selection.selectAll('.layer-touch.turns'); // Draw turns..
+         var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
 
-           var groups = drawLayer.selectAll('g.turn').data(turns, function (d) {
-             return d.key;
-           }); // exit
+         var _entityIDs = [];
 
-           groups.exit().remove(); // enter
+         var _tags;
 
-           var groupsEnter = groups.enter().append('g').attr('class', function (d) {
-             return 'turn ' + d.key;
-           });
-           var turnsEnter = groupsEnter.filter(function (d) {
-             return !d.u;
-           });
-           turnsEnter.append('rect').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
-           turnsEnter.append('use').attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
-           var uEnter = groupsEnter.filter(function (d) {
-             return d.u;
-           });
-           uEnter.append('circle').attr('r', '16');
-           uEnter.append('use').attr('transform', 'translate(-16, -16)').attr('width', '32').attr('height', '32'); // update
+         var _countryCode;
 
-           groups = groups.merge(groupsEnter).attr('opacity', function (d) {
-             return d.direct === false ? '0.7' : null;
-           }).attr('transform', turnTransform);
-           groups.select('use').attr('xlink:href', icon);
-           groups.select('rect'); // propagate bound data
+         var _addressFormats = [{
+           format: [['housenumber', 'street'], ['city', 'postcode']]
+         }];
+         _mainFileFetcher.get('address_formats').then(function (d) {
+           _addressFormats = d;
 
-           groups.select('circle'); // propagate bound data
-           // Draw touch targets..
+           if (!_selection.empty()) {
+             _selection.call(address);
+           }
+         })["catch"](function () {
+           /* ignore */
+         });
 
-           var fillClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           groups = touchLayer.selectAll('g.turn').data(turns, function (d) {
-             return d.key;
-           }); // exit
+         function getNearStreets() {
+           var extent = combinedEntityExtent();
+           var l = extent.center();
+           var box = geoExtent(l).padByMeters(200);
+           var streets = context.history().intersects(box).filter(isAddressable).map(function (d) {
+             var loc = context.projection([(extent[0][0] + extent[1][0]) / 2, (extent[0][1] + extent[1][1]) / 2]);
+             var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
+             return {
+               title: d.tags.name,
+               value: d.tags.name,
+               dist: choice.distance
+             };
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           });
+           return utilArrayUniqBy(streets, 'value');
 
-           groups.exit().remove(); // enter
+           function isAddressable(d) {
+             return d.tags.highway && d.tags.name && d.type === 'way';
+           }
+         }
 
-           groupsEnter = groups.enter().append('g').attr('class', function (d) {
-             return 'turn ' + d.key;
-           });
-           turnsEnter = groupsEnter.filter(function (d) {
-             return !d.u;
-           });
-           turnsEnter.append('rect').attr('class', 'target ' + fillClass).attr('transform', 'translate(-22, -12)').attr('width', '44').attr('height', '24');
-           uEnter = groupsEnter.filter(function (d) {
-             return d.u;
+         function getNearCities() {
+           var extent = combinedEntityExtent();
+           var l = extent.center();
+           var box = geoExtent(l).padByMeters(200);
+           var cities = context.history().intersects(box).filter(isAddressable).map(function (d) {
+             return {
+               title: d.tags['addr:city'] || d.tags.name,
+               value: d.tags['addr:city'] || d.tags.name,
+               dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+             };
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
            });
-           uEnter.append('circle').attr('class', 'target ' + fillClass).attr('r', '16'); // update
-
-           groups = groups.merge(groupsEnter).attr('transform', turnTransform);
-           groups.select('rect'); // propagate bound data
+           return utilArrayUniqBy(cities, 'value');
 
-           groups.select('circle'); // propagate bound data
+           function isAddressable(d) {
+             if (d.tags.name) {
+               if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative') return true;
+               if (d.tags.border_type === 'city') return true;
+               if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village') return true;
+             }
 
-           return this;
+             if (d.tags['addr:city']) return true;
+             return false;
+           }
          }
 
-         return drawTurns;
-       }
-
-       function svgVertices(projection, context) {
-         var radiuses = {
-           //       z16-, z17,   z18+,  w/icon
-           shadow: [6, 7.5, 7.5, 12],
-           stroke: [2.5, 3.5, 3.5, 8],
-           fill: [1, 1.5, 1.5, 1.5]
-         };
-
-         var _currHoverTarget;
+         function getNearValues(key) {
+           var extent = combinedEntityExtent();
+           var l = extent.center();
+           var box = geoExtent(l).padByMeters(200);
+           var results = context.history().intersects(box).filter(function hasTag(d) {
+             return _entityIDs.indexOf(d.id) === -1 && d.tags[key];
+           }).map(function (d) {
+             return {
+               title: d.tags[key],
+               value: d.tags[key],
+               dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
+             };
+           }).sort(function (a, b) {
+             return a.dist - b.dist;
+           });
+           return utilArrayUniqBy(results, 'value');
+         }
 
-         var _currPersistent = {};
-         var _currHover = {};
-         var _prevHover = {};
-         var _currSelected = {};
-         var _prevSelected = {};
-         var _radii = {};
+         function updateForCountryCode() {
+           if (!_countryCode) return;
+           var addressFormat;
 
-         function sortY(a, b) {
-           return b.loc[1] - a.loc[1];
-         } // Avoid exit/enter if we're just moving stuff around.
-         // The node will get a new version but we only need to run the update selection.
+           for (var i = 0; i < _addressFormats.length; i++) {
+             var format = _addressFormats[i];
 
+             if (!format.countryCodes) {
+               addressFormat = format; // choose the default format, keep going
+             } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
+               addressFormat = format; // choose the country format, stop here
 
-         function fastEntityKey(d) {
-           var mode = context.mode();
-           var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-           return isMoving ? d.id : osmEntity.key(d);
-         }
+               break;
+             }
+           }
 
-         function draw(selection, graph, vertices, sets, filter) {
-           sets = sets || {
-             selected: {},
-             important: {},
-             hovered: {}
+           var dropdowns = addressFormat.dropdowns || ['city', 'county', 'country', 'district', 'hamlet', 'neighbourhood', 'place', 'postcode', 'province', 'quarter', 'state', 'street', 'subdistrict', 'suburb'];
+           var widths = addressFormat.widths || {
+             housenumber: 1 / 3,
+             street: 2 / 3,
+             city: 2 / 3,
+             state: 1 / 4,
+             postcode: 1 / 3
            };
-           var icons = {};
-           var directions = {};
-           var wireframe = context.surface().classed('fill-wireframe');
-           var zoom = geoScaleToZoom(projection.scale());
-           var z = zoom < 17 ? 0 : zoom < 18 ? 1 : 2;
-           var activeID = context.activeID();
-           var base = context.history().base();
-
-           function getIcon(d) {
-             // always check latest entity, as fastEntityKey avoids enter/exit now
-             var entity = graph.entity(d.id);
-             if (entity.id in icons) return icons[entity.id];
-             icons[entity.id] = entity.hasInterestingTags() && _mainPresetIndex.match(entity, graph).icon;
-             return icons[entity.id];
-           } // memoize directions results, return false for empty arrays (for use in filter)
-
 
-           function getDirections(entity) {
-             if (entity.id in directions) return directions[entity.id];
-             var angles = entity.directions(graph, projection);
-             directions[entity.id] = angles.length ? angles : false;
-             return angles;
+           function row(r) {
+             // Normalize widths.
+             var total = r.reduce(function (sum, key) {
+               return sum + (widths[key] || 0.5);
+             }, 0);
+             return r.map(function (key) {
+               return {
+                 id: key,
+                 width: (widths[key] || 0.5) / total
+               };
+             });
            }
 
-           function updateAttributes(selection) {
-             ['shadow', 'stroke', 'fill'].forEach(function (klass) {
-               var rads = radiuses[klass];
-               selection.selectAll('.' + klass).each(function (entity) {
-                 var i = z && getIcon(entity);
-                 var r = rads[i ? 3 : z]; // slightly increase the size of unconnected endpoints #3775
+           var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
+             return d.toString();
+           });
 
-                 if (entity.id !== activeID && entity.isEndpoint(graph) && !entity.isConnected(graph)) {
-                   r += 1.5;
-                 }
+           rows.exit().remove();
+           rows.enter().append('div').attr('class', 'addr-row').selectAll('input').data(row).enter().append('input').property('type', 'text').call(updatePlaceholder).attr('class', function (d) {
+             return 'addr-' + d.id;
+           }).call(utilNoAuto).each(addDropdown).style('width', function (d) {
+             return d.width * 100 + '%';
+           });
 
-                 if (klass === 'shadow') {
-                   // remember this value, so we don't need to
-                   _radii[entity.id] = r; // recompute it when we draw the touch targets
-                 }
+           function addDropdown(d) {
+             if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
 
-                 select(this).attr('r', r).attr('visibility', i && klass === 'fill' ? 'hidden' : null);
-               });
-             });
+             var nearValues = d.id === 'street' ? getNearStreets : d.id === 'city' ? getNearCities : getNearValues;
+             select(this).call(uiCombobox(context, 'address-' + d.id).minItems(1).caseSensitive(true).fetcher(function (value, callback) {
+               callback(nearValues('addr:' + d.id));
+             }));
            }
 
-           vertices.sort(sortY);
-           var groups = selection.selectAll('g.vertex').filter(filter).data(vertices, fastEntityKey); // exit
+           _wrap.selectAll('input').on('blur', change()).on('change', change());
 
-           groups.exit().remove(); // enter
+           _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
 
-           var enter = groups.enter().append('g').attr('class', function (d) {
-             return 'node vertex ' + d.id;
-           }).order();
-           enter.append('circle').attr('class', 'shadow');
-           enter.append('circle').attr('class', 'stroke'); // Vertices with tags get a fill.
+           if (_tags) updateTags(_tags);
+         }
 
-           enter.filter(function (d) {
-             return d.hasInterestingTags();
-           }).append('circle').attr('class', 'fill'); // update
+         function address(selection) {
+           _selection = selection;
+           _wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           _wrap = _wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(_wrap);
+           var extent = combinedEntityExtent();
 
-           groups = groups.merge(enter).attr('transform', svgPointTransform(projection)).classed('sibling', function (d) {
-             return d.id in sets.selected;
-           }).classed('shared', function (d) {
-             return graph.isShared(d);
-           }).classed('endpoint', function (d) {
-             return d.isEndpoint(graph);
-           }).classed('added', function (d) {
-             return !base.entities[d.id]; // if it doesn't exist in the base graph, it's new
-           }).classed('moved', function (d) {
-             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].loc, base.entities[d.id].loc);
-           }).classed('retagged', function (d) {
-             return base.entities[d.id] && !fastDeepEqual(graph.entities[d.id].tags, base.entities[d.id].tags);
-           }).call(updateAttributes); // Vertices with icons get a `use`.
+           if (extent) {
+             var countryCode;
 
-           var iconUse = groups.selectAll('.icon').data(function data(d) {
-             return zoom >= 17 && getIcon(d) ? [d] : [];
-           }, fastEntityKey); // exit
+             if (context.inIntro()) {
+               // localize the address format for the walkthrough
+               countryCode = _t('intro.graph.countrycode');
+             } else {
+               var center = extent.center();
+               countryCode = iso1A2Code(center);
+             }
 
-           iconUse.exit().remove(); // enter
+             if (countryCode) {
+               _countryCode = countryCode.toLowerCase();
+               updateForCountryCode();
+             }
+           }
+         }
 
-           iconUse.enter().append('use').attr('class', 'icon').attr('width', '11px').attr('height', '11px').attr('transform', 'translate(-5.5, -5.5)').attr('xlink:href', function (d) {
-             var picon = getIcon(d);
-             var isMaki = /^maki-/.test(picon);
-             return '#' + picon + (isMaki ? '-11' : '');
-           }); // Vertices with directions get viewfields
+         function change(onInput) {
+           return function () {
+             var tags = {};
 
-           var dgroups = groups.selectAll('.viewfieldgroup').data(function data(d) {
-             return zoom >= 18 && getDirections(d) ? [d] : [];
-           }, fastEntityKey); // exit
+             _wrap.selectAll('input').each(function (subfield) {
+               var key = field.key + ':' + subfield.id;
+               var value = this.value;
+               if (!onInput) value = context.cleanTagValue(value); // don't override multiple values with blank string
 
-           dgroups.exit().remove(); // enter/update
+               if (Array.isArray(_tags[key]) && !value) return;
+               tags[key] = value || undefined;
+             });
 
-           dgroups = dgroups.enter().insert('g', '.shadow').attr('class', 'viewfieldgroup').merge(dgroups);
-           var viewfields = dgroups.selectAll('.viewfield').data(getDirections, function key(d) {
-             return osmEntity.key(d);
-           }); // exit
+             dispatch.call('change', this, tags, onInput);
+           };
+         }
 
-           viewfields.exit().remove(); // enter/update
+         function updatePlaceholder(inputSelection) {
+           return inputSelection.attr('placeholder', function (subfield) {
+             if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
+               return _t('inspector.multiple_values');
+             }
 
-           viewfields.enter().append('path').attr('class', 'viewfield').attr('d', 'M0,0H0').merge(viewfields).attr('marker-start', 'url(#ideditor-viewfield-marker' + (wireframe ? '-wireframe' : '') + ')').attr('transform', function (d) {
-             return 'rotate(' + d + ')';
+             if (_countryCode) {
+               var localkey = subfield.id + '!' + _countryCode;
+               var tkey = addrField.hasTextForStringId('placeholders.' + localkey) ? localkey : subfield.id;
+               return addrField.t('placeholders.' + tkey);
+             }
            });
          }
 
-         function drawTargets(selection, graph, entities, filter) {
-           var targetClass = context.getDebug('target') ? 'pink ' : 'nocolor ';
-           var nopeClass = context.getDebug('target') ? 'red ' : 'nocolor ';
-           var getTransform = svgPointTransform(projection).geojson;
-           var activeID = context.activeID();
-           var data = {
-             targets: [],
-             nopes: []
-           };
-           entities.forEach(function (node) {
-             if (activeID === node.id) return; // draw no target on the activeID
+         function updateTags(tags) {
+           utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
+             var val = tags[field.key + ':' + subfield.id];
+             return typeof val === 'string' ? val : '';
+           }).attr('title', function (subfield) {
+             var val = tags[field.key + ':' + subfield.id];
+             return val && Array.isArray(val) ? val.filter(Boolean).join('\n') : undefined;
+           }).classed('mixed', function (subfield) {
+             return Array.isArray(tags[field.key + ':' + subfield.id]);
+           }).call(updatePlaceholder);
+         }
 
-             var vertexType = svgPassiveVertex(node, graph, activeID);
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-             if (vertexType !== 0) {
-               // passive or adjacent - allow to connect
-               data.targets.push({
-                 type: 'Feature',
-                 id: node.id,
-                 properties: {
-                   target: true,
-                   entity: node
-                 },
-                 geometry: node.asGeoJSON()
-               });
-             } else {
-               data.nopes.push({
-                 type: 'Feature',
-                 id: node.id + '-nope',
-                 properties: {
-                   nope: true,
-                   target: true,
-                   entity: node
-                 },
-                 geometry: node.asGeoJSON()
-               });
-             }
-           }); // Targets allow hover and vertex snapping
+         address.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return address;
+         };
 
-           var targets = selection.selectAll('.vertex.target-allowed').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(data.targets, function key(d) {
-             return d.id;
-           }); // exit
+         address.tags = function (tags) {
+           _tags = tags;
+           updateTags(tags);
+         };
 
-           targets.exit().remove(); // enter/update
+         address.focus = function () {
+           var node = _wrap.selectAll('input').node();
 
-           targets.enter().append('circle').attr('r', function (d) {
-             return _radii[d.id] || radiuses.shadow[3];
-           }).merge(targets).attr('class', function (d) {
-             return 'node vertex target target-allowed ' + targetClass + d.id;
-           }).attr('transform', getTransform); // NOPE
+           if (node) node.focus();
+         };
 
-           var nopes = selection.selectAll('.vertex.target-nope').filter(function (d) {
-             return filter(d.properties.entity);
-           }).data(data.nopes, function key(d) {
-             return d.id;
-           }); // exit
+         return utilRebind(address, dispatch, 'on');
+       }
 
-           nopes.exit().remove(); // enter/update
+       function uiFieldCycleway(field, context) {
+         var dispatch = dispatch$8('change');
+         var items = select(null);
+         var wrap = select(null);
 
-           nopes.enter().append('circle').attr('r', function (d) {
-             return _radii[d.properties.entity.id] || radiuses.shadow[3];
-           }).merge(nopes).attr('class', function (d) {
-             return 'node vertex target target-nope ' + nopeClass + d.id;
-           }).attr('transform', getTransform);
-         } // Points can also render as vertices:
-         // 1. in wireframe mode or
-         // 2. at higher zooms if they have a direction
+         var _tags;
 
+         function cycleway(selection) {
+           function stripcolon(s) {
+             return s.replace(':', '');
+           }
 
-         function renderAsVertex(entity, graph, wireframe, zoom) {
-           var geometry = entity.geometry(graph);
-           return geometry === 'vertex' || geometry === 'point' && (wireframe || zoom >= 18 && entity.directions(graph, projection).length);
-         }
+           wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var div = wrap.selectAll('ul').data([0]);
+           div = div.enter().append('ul').attr('class', 'rows').merge(div);
+           var keys = ['cycleway:left', 'cycleway:right'];
+           items = div.selectAll('li').data(keys);
+           var enter = items.enter().append('li').attr('class', function (d) {
+             return 'labeled-input preset-cycleway-' + stripcolon(d);
+           });
+           enter.append('span').attr('class', 'label preset-label-cycleway').attr('for', function (d) {
+             return 'preset-input-cycleway-' + stripcolon(d);
+           }).html(function (d) {
+             return field.t.html('types.' + d);
+           });
+           enter.append('div').attr('class', 'preset-input-cycleway-wrap').append('input').attr('type', 'text').attr('class', function (d) {
+             return 'preset-input-cycleway preset-input-' + stripcolon(d);
+           }).call(utilNoAuto).each(function (d) {
+             select(this).call(uiCombobox(context, 'cycleway-' + stripcolon(d)).data(cycleway.options(d)));
+           });
+           items = items.merge(enter); // Update
 
-         function isEditedNode(node, base, head) {
-           var baseNode = base.entities[node.id];
-           var headNode = head.entities[node.id];
-           return !headNode || !baseNode || !fastDeepEqual(headNode.tags, baseNode.tags) || !fastDeepEqual(headNode.loc, baseNode.loc);
+           wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
          }
 
-         function getSiblingAndChildVertices(ids, graph, wireframe, zoom) {
-           var results = {};
-           var seenIds = {};
+         function change(d3_event, key) {
+           var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
 
-           function addChildVertices(entity) {
-             // avoid redundant work and infinite recursion of circular relations
-             if (seenIds[entity.id]) return;
-             seenIds[entity.id] = true;
-             var geometry = entity.geometry(graph);
+           if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
 
-             if (!context.features().isHiddenFeature(entity, graph, geometry)) {
-               var i;
+           if (newValue === 'none' || newValue === '') {
+             newValue = undefined;
+           }
 
-               if (entity.type === 'way') {
-                 for (i = 0; i < entity.nodes.length; i++) {
-                   var child = graph.hasEntity(entity.nodes[i]);
+           var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
+           var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
 
-                   if (child) {
-                     addChildVertices(child);
-                   }
-                 }
-               } else if (entity.type === 'relation') {
-                 for (i = 0; i < entity.members.length; i++) {
-                   var member = graph.hasEntity(entity.members[i].id);
+           if (otherValue && Array.isArray(otherValue)) {
+             // we must always have an explicit value for comparison
+             otherValue = otherValue[0];
+           }
 
-                   if (member) {
-                     addChildVertices(member);
-                   }
-                 }
-               } else if (renderAsVertex(entity, graph, wireframe, zoom)) {
-                 results[entity.id] = entity;
-               }
-             }
+           if (otherValue === 'none' || otherValue === '') {
+             otherValue = undefined;
            }
 
-           ids.forEach(function (id) {
-             var entity = graph.hasEntity(id);
-             if (!entity) return;
+           var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
+           // sides the same way
 
-             if (entity.type === 'node') {
-               if (renderAsVertex(entity, graph, wireframe, zoom)) {
-                 results[entity.id] = entity;
-                 graph.parentWays(entity).forEach(function (entity) {
-                   addChildVertices(entity);
-                 });
-               }
-             } else {
-               // way, relation
-               addChildVertices(entity);
-             }
-           });
-           return results;
-         }
+           if (newValue === otherValue) {
+             tag = {
+               cycleway: newValue,
+               'cycleway:left': undefined,
+               'cycleway:right': undefined
+             };
+           } else {
+             // Always set both left and right as changing one can affect the other
+             tag = {
+               cycleway: undefined
+             };
+             tag[key] = newValue;
+             tag[otherKey] = otherValue;
+           }
 
-         function drawVertices(selection, graph, entities, filter, extent, fullRedraw) {
-           var wireframe = context.surface().classed('fill-wireframe');
-           var visualDiff = context.surface().classed('highlight-edited');
-           var zoom = geoScaleToZoom(projection.scale());
-           var mode = context.mode();
-           var isMoving = mode && /^(add|draw|drag|move|rotate)/.test(mode.id);
-           var base = context.history().base();
-           var drawLayer = selection.selectAll('.layer-osm.points .points-group.vertices');
-           var touchLayer = selection.selectAll('.layer-touch.points');
+           dispatch.call('change', this, tag);
+         }
 
-           if (fullRedraw) {
-             _currPersistent = {};
-             _radii = {};
-           } // Collect important vertices from the `entities` list..
-           // (during a partial redraw, it will not contain everything)
+         cycleway.options = function () {
+           return field.options.map(function (option) {
+             return {
+               title: field.t('options.' + option + '.description'),
+               value: option
+             };
+           });
+         };
 
+         cycleway.tags = function (tags) {
+           _tags = tags; // If cycleway is set, use that instead of individual values
 
-           for (var i = 0; i < entities.length; i++) {
-             var entity = entities[i];
-             var geometry = entity.geometry(graph);
-             var keep = false; // a point that looks like a vertex..
+           var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
+           utilGetSetValue(items.selectAll('.preset-input-cycleway'), function (d) {
+             if (commonValue) return commonValue;
+             return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
+           }).attr('title', function (d) {
+             if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+               var vals = [];
 
-             if (geometry === 'point' && renderAsVertex(entity, graph, wireframe, zoom)) {
-               _currPersistent[entity.id] = entity;
-               keep = true; // a vertex of some importance..
-             } else if (geometry === 'vertex' && (entity.hasInterestingTags() || entity.isEndpoint(graph) || entity.isConnected(graph) || visualDiff && isEditedNode(entity, base, graph))) {
-               _currPersistent[entity.id] = entity;
-               keep = true;
-             } // whatever this is, it's not a persistent vertex..
+               if (Array.isArray(tags.cycleway)) {
+                 vals = vals.concat(tags.cycleway);
+               }
 
+               if (Array.isArray(tags[d])) {
+                 vals = vals.concat(tags[d]);
+               }
 
-             if (!keep && !fullRedraw) {
-               delete _currPersistent[entity.id];
+               return vals.filter(Boolean).join('\n');
              }
-           } // 3 sets of vertices to consider:
 
+             return null;
+           }).attr('placeholder', function (d) {
+             if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
+               return _t('inspector.multiple_values');
+             }
 
-           var sets = {
-             persistent: _currPersistent,
-             // persistent = important vertices (render always)
-             selected: _currSelected,
-             // selected + siblings of selected (render always)
-             hovered: _currHover // hovered + siblings of hovered (render only in draw modes)
-
-           };
-           var all = Object.assign({}, isMoving ? _currHover : {}, _currSelected, _currPersistent); // Draw the vertices..
-           // The filter function controls the scope of what objects d3 will touch (exit/enter/update)
-           // Adjust the filter function to expand the scope beyond whatever entities were passed in.
+             return field.placeholder();
+           }).classed('mixed', function (d) {
+             return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
+           });
+         };
 
-           var filterRendered = function filterRendered(d) {
-             return d.id in _currPersistent || d.id in _currSelected || d.id in _currHover || filter(d);
-           };
+         cycleway.focus = function () {
+           var node = wrap.selectAll('input').node();
+           if (node) node.focus();
+         };
 
-           drawLayer.call(draw, graph, currentVisible(all), sets, filterRendered); // Draw touch targets..
-           // When drawing, render all targets (not just those affected by a partial redraw)
+         return utilRebind(cycleway, dispatch, 'on');
+       }
 
-           var filterTouch = function filterTouch(d) {
-             return isMoving ? true : filterRendered(d);
-           };
+       function uiFieldLanes(field, context) {
+         var dispatch = dispatch$8('change');
+         var LANE_WIDTH = 40;
+         var LANE_HEIGHT = 200;
+         var _entityIDs = [];
 
-           touchLayer.call(drawTargets, graph, currentVisible(all), filterTouch);
+         function lanes(selection) {
+           var lanesData = context.entity(_entityIDs[0]).lanes();
 
-           function currentVisible(which) {
-             return Object.keys(which).map(graph.hasEntity, graph) // the current version of this entity
-             .filter(function (entity) {
-               return entity && entity.intersects(extent, graph);
-             });
+           if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
+             selection.call(lanes.off);
+             return;
            }
-         } // partial redraw - only update the selected items..
 
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var surface = wrap.selectAll('.surface').data([0]);
+           var d = utilGetDimensions(wrap);
+           var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
+           surface = surface.enter().append('svg').attr('width', d[0]).attr('height', 300).attr('class', 'surface').merge(surface);
+           var lanesSelection = surface.selectAll('.lanes').data([0]);
+           lanesSelection = lanesSelection.enter().append('g').attr('class', 'lanes').merge(lanesSelection);
+           lanesSelection.attr('transform', function () {
+             return 'translate(' + freeSpace / 2 + ', 0)';
+           });
+           var lane = lanesSelection.selectAll('.lane').data(lanesData.lanes);
+           lane.exit().remove();
+           var enter = lane.enter().append('g').attr('class', 'lane');
+           enter.append('g').append('rect').attr('y', 50).attr('width', LANE_WIDTH).attr('height', LANE_HEIGHT);
+           enter.append('g').attr('class', 'forward').append('text').attr('y', 40).attr('x', 14).text('▲');
+           enter.append('g').attr('class', 'bothways').append('text').attr('y', 40).attr('x', 14).text('▲▼');
+           enter.append('g').attr('class', 'backward').append('text').attr('y', 40).attr('x', 14).text('▼');
+           lane = lane.merge(enter);
+           lane.attr('transform', function (d) {
+             return 'translate(' + LANE_WIDTH * d.index * 1.5 + ', 0)';
+           });
+           lane.select('.forward').style('visibility', function (d) {
+             return d.direction === 'forward' ? 'visible' : 'hidden';
+           });
+           lane.select('.bothways').style('visibility', function (d) {
+             return d.direction === 'bothways' ? 'visible' : 'hidden';
+           });
+           lane.select('.backward').style('visibility', function (d) {
+             return d.direction === 'backward' ? 'visible' : 'hidden';
+           });
+         }
 
-         drawVertices.drawSelected = function (selection, graph, extent) {
-           var wireframe = context.surface().classed('fill-wireframe');
-           var zoom = geoScaleToZoom(projection.scale());
-           _prevSelected = _currSelected || {};
+         lanes.entityIDs = function (val) {
+           _entityIDs = val;
+         };
 
-           if (context.map().isInWideSelection()) {
-             _currSelected = {};
-             context.selectedIDs().forEach(function (id) {
-               var entity = graph.hasEntity(id);
-               if (!entity) return;
+         lanes.tags = function () {};
 
-               if (entity.type === 'node') {
-                 if (renderAsVertex(entity, graph, wireframe, zoom)) {
-                   _currSelected[entity.id] = entity;
-                 }
-               }
-             });
-           } else {
-             _currSelected = getSiblingAndChildVertices(context.selectedIDs(), graph, wireframe, zoom);
-           } // note that drawVertices will add `_currSelected` automatically if needed..
+         lanes.focus = function () {};
 
+         lanes.off = function () {};
 
-           var filter = function filter(d) {
-             return d.id in _prevSelected;
-           };
+         return utilRebind(lanes, dispatch, 'on');
+       }
+       uiFieldLanes.supportsMultiselection = false;
 
-           drawVertices(selection, graph, Object.values(_prevSelected), filter, extent, false);
-         }; // partial redraw - only update the hovered items..
+       var _languagesArray = [];
+       function uiFieldLocalized(field, context) {
+         var dispatch = dispatch$8('change', 'input');
+         var wikipedia = services.wikipedia;
+         var input = select(null);
+         var localizedInputs = select(null);
 
+         var _countryCode;
 
-         drawVertices.drawHover = function (selection, graph, target, extent) {
-           if (target === _currHoverTarget) return; // continue only if something changed
+         var _tags; // A concern here in switching to async data means that _languagesArray will not
+         // be available the first time through, so things like the fetchers and
+         // the language() function will not work immediately.
 
-           var wireframe = context.surface().classed('fill-wireframe');
-           var zoom = geoScaleToZoom(projection.scale());
-           _prevHover = _currHover || {};
-           _currHoverTarget = target;
-           var entity = target && target.properties && target.properties.entity;
 
-           if (entity) {
-             _currHover = getSiblingAndChildVertices([entity.id], graph, wireframe, zoom);
-           } else {
-             _currHover = {};
-           } // note that drawVertices will add `_currHover` automatically if needed..
+         _mainFileFetcher.get('languages').then(loadLanguagesArray)["catch"](function () {
+           /* ignore */
+         });
+         var _territoryLanguages = {};
+         _mainFileFetcher.get('territory_languages').then(function (d) {
+           _territoryLanguages = d;
+         })["catch"](function () {
+           /* ignore */
+         }); // reuse these combos
 
+         var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
 
-           var filter = function filter(d) {
-             return d.id in _prevHover;
-           };
+         var _selection = select(null);
 
-           drawVertices(selection, graph, Object.values(_prevHover), filter, extent, false);
-         };
+         var _multilingual = [];
 
-         return drawVertices;
-       }
+         var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
 
-       function utilBindOnce(target, type, listener, capture) {
-         var typeOnce = type + '.once';
+         var _wikiTitles;
 
-         function one() {
-           target.on(typeOnce, null);
-           listener.apply(this, arguments);
-         }
+         var _entityIDs = [];
 
-         target.on(typeOnce, one, capture);
-         return this;
-       }
+         function loadLanguagesArray(dataLanguages) {
+           if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
 
-       function defaultFilter$2(d3_event) {
-         return !d3_event.ctrlKey && !d3_event.button;
-       }
+           var replacements = {
+             sr: 'sr-Cyrl',
+             // in OSM, `sr` implies Cyrillic
+             'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
 
-       function defaultExtent$1() {
-         var e = this;
+           };
 
-         if (e instanceof SVGElement) {
-           e = e.ownerSVGElement || e;
+           for (var code in dataLanguages) {
+             if (replacements[code] === false) continue;
+             var metaCode = code;
+             if (replacements[code]) metaCode = replacements[code];
 
-           if (e.hasAttribute('viewBox')) {
-             e = e.viewBox.baseVal;
-             return [[e.x, e.y], [e.x + e.width, e.y + e.height]];
+             _languagesArray.push({
+               localName: _mainLocalizer.languageName(metaCode, {
+                 localOnly: true
+               }),
+               nativeName: dataLanguages[metaCode].nativeName,
+               code: code,
+               label: _mainLocalizer.languageName(metaCode)
+             });
            }
-
-           return [[0, 0], [e.width.baseVal.value, e.height.baseVal.value]];
          }
 
-         return [[0, 0], [e.clientWidth, e.clientHeight]];
-       }
-
-       function defaultWheelDelta$1(d3_event) {
-         return -d3_event.deltaY * (d3_event.deltaMode === 1 ? 0.05 : d3_event.deltaMode ? 1 : 0.002);
-       }
+         function calcLocked() {
+           // Protect name field for suggestion presets that don't display a brand/operator field
+           var isLocked = field.id === 'name' && _entityIDs.length && _entityIDs.some(function (entityID) {
+             var entity = context.graph().hasEntity(entityID);
+             if (!entity) return false; // Features linked to Wikidata are likely important and should be protected
 
-       function defaultConstrain$1(transform, extent, translateExtent) {
-         var dx0 = transform.invertX(extent[0][0]) - translateExtent[0][0],
-             dx1 = transform.invertX(extent[1][0]) - translateExtent[1][0],
-             dy0 = transform.invertY(extent[0][1]) - translateExtent[0][1],
-             dy1 = transform.invertY(extent[1][1]) - translateExtent[1][1];
-         return transform.translate(dx1 > dx0 ? (dx0 + dx1) / 2 : Math.min(0, dx0) || Math.max(0, dx1), dy1 > dy0 ? (dy0 + dy1) / 2 : Math.min(0, dy0) || Math.max(0, dy1));
-       }
+             if (entity.tags.wikidata) return true; // Assume the name has already been confirmed if its source has been researched
 
-       function utilZoomPan() {
-         var filter = defaultFilter$2,
-             extent = defaultExtent$1,
-             constrain = defaultConstrain$1,
-             wheelDelta = defaultWheelDelta$1,
-             scaleExtent = [0, Infinity],
-             translateExtent = [[-Infinity, -Infinity], [Infinity, Infinity]],
-             interpolate = interpolateZoom,
-             dispatch$1 = dispatch('start', 'zoom', 'end'),
-             _wheelDelay = 150,
-             _transform = identity$2,
-             _activeGesture;
+             if (entity.tags['name:etymology:wikidata']) return true; // Lock the `name` if this is a suggestion preset that assigns the name,
+             // and the preset does not display a `brand` or `operator` field.
+             // (For presets like hotels, car dealerships, post offices, the `name` should remain editable)
+             // see also similar logic in `outdated_tags.js`
 
-         function zoom(selection) {
-           selection.on('pointerdown.zoom', pointerdown).on('wheel.zoom', wheeled).style('touch-action', 'none').style('-webkit-tap-highlight-color', 'rgba(0,0,0,0)');
-           select(window).on('pointermove.zoompan', pointermove).on('pointerup.zoompan pointercancel.zoompan', pointerup);
-         }
+             var preset = _mainPresetIndex.match(entity, context.graph());
 
-         zoom.transform = function (collection, transform, point) {
-           var selection = collection.selection ? collection.selection() : collection;
+             if (preset) {
+               var isSuggestion = preset.suggestion;
+               var fields = preset.fields();
+               var showsBrandField = fields.some(function (d) {
+                 return d.id === 'brand';
+               });
+               var showsOperatorField = fields.some(function (d) {
+                 return d.id === 'operator';
+               });
+               var setsName = preset.addTags.name;
+               var setsBrandWikidata = preset.addTags['brand:wikidata'];
+               var setsOperatorWikidata = preset.addTags['operator:wikidata'];
+               return isSuggestion && setsName && (setsBrandWikidata && !showsBrandField || setsOperatorWikidata && !showsOperatorField);
+             }
 
-           if (collection !== selection) {
-             schedule(collection, transform, point);
-           } else {
-             selection.interrupt().each(function () {
-               gesture(this, arguments).start(null).zoom(null, null, typeof transform === 'function' ? transform.apply(this, arguments) : transform).end(null);
-             });
-           }
-         };
+             return false;
+           });
 
-         zoom.scaleBy = function (selection, k, p) {
-           zoom.scaleTo(selection, function () {
-             var k0 = _transform.k,
-                 k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
-             return k0 * k1;
-           }, p);
-         };
+           field.locked(isLocked);
+         } // update _multilingual, maintaining the existing order
 
-         zoom.scaleTo = function (selection, k, p) {
-           zoom.transform(selection, function () {
-             var e = extent.apply(this, arguments),
-                 t0 = _transform,
-                 p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p,
-                 p1 = t0.invert(p0),
-                 k1 = typeof k === 'function' ? k.apply(this, arguments) : k;
-             return constrain(translate(scale(t0, k1), p0, p1), e, translateExtent);
-           }, p);
-         };
 
-         zoom.translateBy = function (selection, x, y) {
-           zoom.transform(selection, function () {
-             return constrain(_transform.translate(typeof x === 'function' ? x.apply(this, arguments) : x, typeof y === 'function' ? y.apply(this, arguments) : y), extent.apply(this, arguments), translateExtent);
+         function calcMultilingual(tags) {
+           var existingLangsOrdered = _multilingual.map(function (item) {
+             return item.lang;
            });
-         };
 
-         zoom.translateTo = function (selection, x, y, p) {
-           zoom.transform(selection, function () {
-             var e = extent.apply(this, arguments),
-                 t = _transform,
-                 p0 = !p ? centroid(e) : typeof p === 'function' ? p.apply(this, arguments) : p;
-             return constrain(identity$2.translate(p0[0], p0[1]).scale(t.k).translate(typeof x === 'function' ? -x.apply(this, arguments) : -x, typeof y === 'function' ? -y.apply(this, arguments) : -y), e, translateExtent);
-           }, p);
-         };
+           var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
 
-         function scale(transform, k) {
-           k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], k));
-           return k === transform.k ? transform : new Transform(k, transform.x, transform.y);
-         }
+           for (var k in tags) {
+             var m = k.match(/^(.*):(.*)$/);
 
-         function translate(transform, p0, p1) {
-           var x = p0[0] - p1[0] * transform.k,
-               y = p0[1] - p1[1] * transform.k;
-           return x === transform.x && y === transform.y ? transform : new Transform(transform.k, x, y);
-         }
+             if (m && m[1] === field.key && m[2]) {
+               var item = {
+                 lang: m[2],
+                 value: tags[k]
+               };
 
-         function centroid(extent) {
-           return [(+extent[0][0] + +extent[1][0]) / 2, (+extent[0][1] + +extent[1][1]) / 2];
-         }
+               if (existingLangs.has(item.lang)) {
+                 // update the value
+                 _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
+                 existingLangs["delete"](item.lang);
+               } else {
+                 _multilingual.push(item);
+               }
+             }
+           } // Don't remove items based on deleted tags, since this makes the UI
+           // disappear unexpectedly when clearing values - #8164
 
-         function schedule(transition, transform, point) {
-           transition.on('start.zoom', function () {
-             gesture(this, arguments).start(null);
-           }).on('interrupt.zoom end.zoom', function () {
-             gesture(this, arguments).end(null);
-           }).tween('zoom', function () {
-             var that = this,
-                 args = arguments,
-                 g = gesture(that, args),
-                 e = extent.apply(that, args),
-                 p = !point ? centroid(e) : typeof point === 'function' ? point.apply(that, args) : point,
-                 w = Math.max(e[1][0] - e[0][0], e[1][1] - e[0][1]),
-                 a = _transform,
-                 b = typeof transform === 'function' ? transform.apply(that, args) : transform,
-                 i = interpolate(a.invert(p).concat(w / a.k), b.invert(p).concat(w / b.k));
-             return function (t) {
-               if (t === 1) t = b; // Avoid rounding error on end.
-               else {
-                   var l = i(t),
-                       k = w / l[2];
-                   t = new Transform(k, p[0] - l[0] * k, p[1] - l[1] * k);
-                 }
-               g.zoom(null, null, t);
-             };
-           });
-         }
 
-         function gesture(that, args, clean) {
-           return !clean && _activeGesture || new Gesture(that, args);
+           _multilingual.forEach(function (item) {
+             if (item.lang && existingLangs.has(item.lang)) {
+               item.value = '';
+             }
+           });
          }
 
-         function Gesture(that, args) {
-           this.that = that;
-           this.args = args;
-           this.active = 0;
-           this.extent = extent.apply(that, args);
-         }
+         function localized(selection) {
+           _selection = selection;
+           calcLocked();
+           var isLocked = field.locked();
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update
 
-         Gesture.prototype = {
-           start: function start(d3_event) {
-             if (++this.active === 1) {
-               _activeGesture = this;
-               dispatch$1.call('start', this, d3_event);
-             }
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('.localized-main').data([0]); // enter/update
 
-             return this;
-           },
-           zoom: function zoom(d3_event, key, transform) {
-             if (this.mouse && key !== 'mouse') this.mouse[1] = transform.invert(this.mouse[0]);
-             if (this.pointer0 && key !== 'touch') this.pointer0[1] = transform.invert(this.pointer0[0]);
-             if (this.pointer1 && key !== 'touch') this.pointer1[1] = transform.invert(this.pointer1[0]);
-             _transform = transform;
-             dispatch$1.call('zoom', this, d3_event, key, transform);
-             return this;
-           },
-           end: function end(d3_event) {
-             if (--this.active === 0) {
-               _activeGesture = null;
-               dispatch$1.call('end', this, d3_event);
-             }
+           input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
+           input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
+           var translateButton = wrap.selectAll('.localized-add').data([0]);
+           translateButton = translateButton.enter().append('button').attr('class', 'localized-add form-field-button').attr('aria-label', _t('icons.plus')).call(svgIcon('#iD-icon-plus')).merge(translateButton);
+           translateButton.classed('disabled', !!isLocked).call(isLocked ? _buttonTip.destroy : _buttonTip).on('click', addNew);
 
-             return this;
+           if (_tags && !_multilingual.length) {
+             calcMultilingual(_tags);
            }
-         };
 
-         function wheeled(d3_event) {
-           if (!filter.apply(this, arguments)) return;
-           var g = gesture(this, arguments),
-               t = _transform,
-               k = Math.max(scaleExtent[0], Math.min(scaleExtent[1], t.k * Math.pow(2, wheelDelta.apply(this, arguments)))),
-               p = utilFastMouse(this)(d3_event); // If the mouse is in the same location as before, reuse it.
-           // If there were recent wheel events, reset the wheel idle timeout.
+           localizedInputs = selection.selectAll('.localized-multilingual').data([0]);
+           localizedInputs = localizedInputs.enter().append('div').attr('class', 'localized-multilingual').merge(localizedInputs);
+           localizedInputs.call(renderMultilingual);
+           localizedInputs.selectAll('button, input').classed('disabled', !!isLocked).attr('readonly', isLocked || null);
+           selection.selectAll('.combobox-caret').classed('nope', true);
 
-           if (g.wheel) {
-             if (g.mouse[0][0] !== p[0] || g.mouse[0][1] !== p[1]) {
-               g.mouse[1] = t.invert(g.mouse[0] = p);
+           function addNew(d3_event) {
+             d3_event.preventDefault();
+             if (field.locked()) return;
+             var defaultLang = _mainLocalizer.languageCode().toLowerCase();
+
+             var langExists = _multilingual.find(function (datum) {
+               return datum.lang === defaultLang;
+             });
+
+             var isLangEn = defaultLang.indexOf('en') > -1;
+
+             if (isLangEn || langExists) {
+               defaultLang = '';
+               langExists = _multilingual.find(function (datum) {
+                 return datum.lang === defaultLang;
+               });
              }
 
-             clearTimeout(g.wheel); // Otherwise, capture the mouse point and location at the start.
-           } else {
-             g.mouse = [p, t.invert(p)];
-             interrupt(this);
-             g.start(d3_event);
+             if (!langExists) {
+               // prepend the value so it appears at the top
+               _multilingual.unshift({
+                 lang: defaultLang,
+                 value: ''
+               });
+
+               localizedInputs.call(renderMultilingual);
+             }
            }
 
-           d3_event.preventDefault();
-           d3_event.stopImmediatePropagation();
-           g.wheel = setTimeout(wheelidled, _wheelDelay);
-           g.zoom(d3_event, 'mouse', constrain(translate(scale(t, k), g.mouse[0], g.mouse[1]), g.extent, translateExtent));
+           function change(onInput) {
+             return function (d3_event) {
+               if (field.locked()) {
+                 d3_event.preventDefault();
+                 return;
+               }
 
-           function wheelidled() {
-             g.wheel = null;
-             g.end(d3_event);
+               var val = utilGetSetValue(select(this));
+               if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
+
+               if (!val && Array.isArray(_tags[field.key])) return;
+               var t = {};
+               t[field.key] = val || undefined;
+               dispatch.call('change', this, t, onInput);
+             };
            }
          }
 
-         var _downPointerIDs = new Set();
-
-         var _pointerLocGetter;
+         function key(lang) {
+           return field.key + ':' + lang;
+         }
 
-         function pointerdown(d3_event) {
-           _downPointerIDs.add(d3_event.pointerId);
+         function changeLang(d3_event, d) {
+           var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
 
-           if (!filter.apply(this, arguments)) return;
-           var g = gesture(this, arguments, _downPointerIDs.size === 1);
-           var started;
-           d3_event.stopImmediatePropagation();
-           _pointerLocGetter = utilFastMouse(this);
+           var lang = utilGetSetValue(select(this)).toLowerCase();
 
-           var loc = _pointerLocGetter(d3_event);
+           var language = _languagesArray.find(function (d) {
+             return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
+           });
 
-           var p = [loc, _transform.invert(loc), d3_event.pointerId];
+           if (language) lang = language.code;
 
-           if (!g.pointer0) {
-             g.pointer0 = p;
-             started = true;
-           } else if (!g.pointer1 && g.pointer0[2] !== p[2]) {
-             g.pointer1 = p;
+           if (d.lang && d.lang !== lang) {
+             tags[key(d.lang)] = undefined;
            }
 
-           if (started) {
-             interrupt(this);
-             g.start(d3_event);
+           var newKey = lang && context.cleanTagKey(key(lang));
+           var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+
+           if (newKey && value) {
+             tags[newKey] = value;
+           } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
+             tags[newKey] = _wikiTitles[d.lang];
            }
+
+           d.lang = lang;
+           dispatch.call('change', this, tags);
          }
 
-         function pointermove(d3_event) {
-           if (!_downPointerIDs.has(d3_event.pointerId)) return;
-           if (!_activeGesture || !_pointerLocGetter) return;
-           var g = gesture(this, arguments);
-           var isPointer0 = g.pointer0 && g.pointer0[2] === d3_event.pointerId;
-           var isPointer1 = !isPointer0 && g.pointer1 && g.pointer1[2] === d3_event.pointerId;
+         function changeValue(d3_event, d) {
+           if (!d.lang) return;
+           var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined; // don't override multiple values with blank string
 
-           if ((isPointer0 || isPointer1) && 'buttons' in d3_event && !d3_event.buttons) {
-             // The pointer went up without ending the gesture somehow, e.g.
-             // a down mouse was moved off the map and released. End it here.
-             if (g.pointer0) _downPointerIDs["delete"](g.pointer0[2]);
-             if (g.pointer1) _downPointerIDs["delete"](g.pointer1[2]);
-             g.end(d3_event);
-             return;
-           }
+           if (!value && Array.isArray(d.value)) return;
+           var t = {};
+           t[key(d.lang)] = value;
+           d.value = value;
+           dispatch.call('change', this, t);
+         }
 
-           d3_event.preventDefault();
-           d3_event.stopImmediatePropagation();
+         function fetchLanguages(value, cb) {
+           var v = value.toLowerCase(); // show the user's language first
 
-           var loc = _pointerLocGetter(d3_event);
+           var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
 
-           var t, p, l;
-           if (isPointer0) g.pointer0[0] = loc;else if (isPointer1) g.pointer1[0] = loc;
-           t = _transform;
+           if (_countryCode && _territoryLanguages[_countryCode]) {
+             langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
+           }
 
-           if (g.pointer1) {
-             var p0 = g.pointer0[0],
-                 l0 = g.pointer0[1],
-                 p1 = g.pointer1[0],
-                 l1 = g.pointer1[1],
-                 dp = (dp = p1[0] - p0[0]) * dp + (dp = p1[1] - p0[1]) * dp,
-                 dl = (dl = l1[0] - l0[0]) * dl + (dl = l1[1] - l0[1]) * dl;
-             t = scale(t, Math.sqrt(dp / dl));
-             p = [(p0[0] + p1[0]) / 2, (p0[1] + p1[1]) / 2];
-             l = [(l0[0] + l1[0]) / 2, (l0[1] + l1[1]) / 2];
-           } else if (g.pointer0) {
-             p = g.pointer0[0];
-             l = g.pointer0[1];
-           } else return;
+           var langItems = [];
+           langCodes.forEach(function (code) {
+             var langItem = _languagesArray.find(function (item) {
+               return item.code === code;
+             });
 
-           g.zoom(d3_event, 'touch', constrain(translate(t, p, l), g.extent, translateExtent));
+             if (langItem) langItems.push(langItem);
+           });
+           langItems = utilArrayUniq(langItems.concat(_languagesArray));
+           cb(langItems.filter(function (d) {
+             return d.label.toLowerCase().indexOf(v) >= 0 || d.localName && d.localName.toLowerCase().indexOf(v) >= 0 || d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0 || d.code.toLowerCase().indexOf(v) >= 0;
+           }).map(function (d) {
+             return {
+               value: d.label
+             };
+           }));
          }
 
-         function pointerup(d3_event) {
-           if (!_downPointerIDs.has(d3_event.pointerId)) return;
+         function renderMultilingual(selection) {
+           var entries = selection.selectAll('div.entry').data(_multilingual, function (d) {
+             return d.lang;
+           });
+           entries.exit().style('top', '0').style('max-height', '240px').transition().duration(200).style('opacity', '0').style('max-height', '0px').remove();
+           var entriesEnter = entries.enter().append('div').attr('class', 'entry').each(function (_, index) {
+             var wrap = select(this);
+             var domId = utilUniqueDomId(index);
+             var label = wrap.append('label').attr('class', 'field-label').attr('for', domId);
+             var text = label.append('span').attr('class', 'label-text');
+             text.append('span').attr('class', 'label-textvalue').call(_t.append('translate.localized_translation_label'));
+             text.append('span').attr('class', 'label-textannotation');
+             label.append('button').attr('class', 'remove-icon-multilingual').attr('title', _t('icons.remove')).on('click', function (d3_event, d) {
+               if (field.locked()) return;
+               d3_event.preventDefault(); // remove the UI item manually
 
-           _downPointerIDs["delete"](d3_event.pointerId);
+               _multilingual.splice(_multilingual.indexOf(d), 1);
 
-           if (!_activeGesture) return;
-           var g = gesture(this, arguments);
-           d3_event.stopImmediatePropagation();
-           if (g.pointer0 && g.pointer0[2] === d3_event.pointerId) delete g.pointer0;else if (g.pointer1 && g.pointer1[2] === d3_event.pointerId) delete g.pointer1;
+               var langKey = d.lang && key(d.lang);
 
-           if (g.pointer1 && !g.pointer0) {
-             g.pointer0 = g.pointer1;
-             delete g.pointer1;
-           }
+               if (langKey && langKey in _tags) {
+                 delete _tags[langKey]; // remove from entity tags
 
-           if (g.pointer0) g.pointer0[1] = _transform.invert(g.pointer0[0]);else {
-             g.end(d3_event);
-           }
+                 var t = {};
+                 t[langKey] = undefined;
+                 dispatch.call('change', this, t);
+                 return;
+               }
+
+               renderMultilingual(selection);
+             }).call(svgIcon('#iD-operation-delete'));
+             wrap.append('input').attr('class', 'localized-lang').attr('id', domId).attr('type', 'text').attr('placeholder', _t('translate.localized_translation_language')).on('blur', changeLang).on('change', changeLang).call(langCombo);
+             wrap.append('input').attr('type', 'text').attr('class', 'localized-value').on('blur', changeValue).on('change', changeValue);
+           });
+           entriesEnter.style('margin-top', '0px').style('max-height', '0px').style('opacity', '0').transition().duration(200).style('margin-top', '10px').style('max-height', '240px').style('opacity', '1').on('end', function () {
+             select(this).style('max-height', '').style('overflow', 'visible');
+           });
+           entries = entries.merge(entriesEnter);
+           entries.order(); // allow removing the entry UIs even if there isn't a tag to remove
+
+           entries.classed('present', true);
+           utilGetSetValue(entries.select('.localized-lang'), function (d) {
+             var langItem = _languagesArray.find(function (item) {
+               return item.code === d.lang;
+             });
+
+             if (langItem) return langItem.label;
+             return d.lang;
+           });
+           utilGetSetValue(entries.select('.localized-value'), function (d) {
+             return typeof d.value === 'string' ? d.value : '';
+           }).attr('title', function (d) {
+             return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
+           }).attr('placeholder', function (d) {
+             return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
+           }).classed('mixed', function (d) {
+             return Array.isArray(d.value);
+           });
          }
 
-         zoom.wheelDelta = function (_) {
-           return arguments.length ? (wheelDelta = utilFunctor(+_), zoom) : wheelDelta;
-         };
+         localized.tags = function (tags) {
+           _tags = tags; // Fetch translations from wikipedia
 
-         zoom.filter = function (_) {
-           return arguments.length ? (filter = utilFunctor(!!_), zoom) : filter;
-         };
+           if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
+             _wikiTitles = {};
+             var wm = tags.wikipedia.match(/([^:]+):(.+)/);
 
-         zoom.extent = function (_) {
-           return arguments.length ? (extent = utilFunctor([[+_[0][0], +_[0][1]], [+_[1][0], +_[1][1]]]), zoom) : extent;
-         };
+             if (wm && wm[0] && wm[1]) {
+               wikipedia.translations(wm[1], wm[2], function (err, d) {
+                 if (err || !d) return;
+                 _wikiTitles = d;
+               });
+             }
+           }
 
-         zoom.scaleExtent = function (_) {
-           return arguments.length ? (scaleExtent[0] = +_[0], scaleExtent[1] = +_[1], zoom) : [scaleExtent[0], scaleExtent[1]];
-         };
+           var isMixed = Array.isArray(tags[field.key]);
+           utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+           calcMultilingual(tags);
 
-         zoom.translateExtent = function (_) {
-           return arguments.length ? (translateExtent[0][0] = +_[0][0], translateExtent[1][0] = +_[1][0], translateExtent[0][1] = +_[0][1], translateExtent[1][1] = +_[1][1], zoom) : [[translateExtent[0][0], translateExtent[0][1]], [translateExtent[1][0], translateExtent[1][1]]];
+           _selection.call(localized);
          };
 
-         zoom.constrain = function (_) {
-           return arguments.length ? (constrain = _, zoom) : constrain;
+         localized.focus = function () {
+           input.node().focus();
          };
 
-         zoom.interpolate = function (_) {
-           return arguments.length ? (interpolate = _, zoom) : interpolate;
+         localized.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _multilingual = [];
+           loadCountryCode();
+           return localized;
          };
 
-         zoom._transform = function (_) {
-           return arguments.length ? (_transform = _, zoom) : _transform;
-         };
+         function loadCountryCode() {
+           var extent = combinedEntityExtent();
+           var countryCode = extent && iso1A2Code(extent.center());
+           _countryCode = countryCode && countryCode.toLowerCase();
+         }
+
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-         return utilRebind(zoom, dispatch$1, 'on');
+         return utilRebind(localized, dispatch, 'on');
        }
 
-       // if pointer events are supported. Falls back to default `dblclick` event.
+       function uiFieldRoadheight(field, context) {
+         var dispatch = dispatch$8('change');
+         var primaryUnitInput = select(null);
+         var primaryInput = select(null);
+         var secondaryInput = select(null);
+         var secondaryUnitInput = select(null);
+         var _entityIDs = [];
 
-       function utilDoubleUp() {
-         var dispatch$1 = dispatch('doubleUp');
-         var _maxTimespan = 500; // milliseconds
+         var _tags;
 
-         var _maxDistance = 20; // web pixels; be somewhat generous to account for touch devices
+         var _isImperial;
 
-         var _pointer; // object representing the pointer that could trigger double up
+         var primaryUnits = [{
+           value: 'm',
+           title: _t('inspector.roadheight.meter')
+         }, {
+           value: 'ft',
+           title: _t('inspector.roadheight.foot')
+         }];
+         var unitCombo = uiCombobox(context, 'roadheight-unit').data(primaryUnits);
 
+         function roadheight(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           primaryInput = wrap.selectAll('input.roadheight-number').data([0]);
+           primaryInput = primaryInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-number').attr('id', field.domId).call(utilNoAuto).merge(primaryInput);
+           primaryInput.on('change', change).on('blur', change);
+           var loc = combinedEntityExtent().center();
+           _isImperial = roadHeightUnit(loc) === 'ft';
+           primaryUnitInput = wrap.selectAll('input.roadheight-unit').data([0]);
+           primaryUnitInput = primaryUnitInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-unit').call(unitCombo).merge(primaryUnitInput);
+           primaryUnitInput.on('blur', changeUnits).on('change', changeUnits);
+           secondaryInput = wrap.selectAll('input.roadheight-secondary-number').data([0]);
+           secondaryInput = secondaryInput.enter().append('input').attr('type', 'text').attr('class', 'roadheight-secondary-number').call(utilNoAuto).merge(secondaryInput);
+           secondaryInput.on('change', change).on('blur', change);
+           secondaryUnitInput = wrap.selectAll('input.roadheight-secondary-unit').data([0]);
+           secondaryUnitInput = secondaryUnitInput.enter().append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', true).classed('roadheight-secondary-unit', true).attr('readonly', 'readonly').merge(secondaryUnitInput);
 
-         function pointerIsValidFor(loc) {
-           // second pointerup must occur within a small timeframe after the first pointerdown
-           return new Date().getTime() - _pointer.startTime <= _maxTimespan && // all pointer events must occur within a small distance of the first pointerdown
-           geoVecLength(_pointer.startLoc, loc) <= _maxDistance;
+           function changeUnits() {
+             _isImperial = utilGetSetValue(primaryUnitInput) === 'ft';
+             utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+             setUnitSuggestions();
+             change();
+           }
          }
 
-         function pointerdown(d3_event) {
-           // ignore right-click
-           if (d3_event.ctrlKey || d3_event.button === 2) return;
-           var loc = [d3_event.clientX, d3_event.clientY]; // Don't rely on pointerId here since it can change between pointerdown
-           // events on touch devices
+         function setUnitSuggestions() {
+           utilGetSetValue(primaryUnitInput, _isImperial ? 'ft' : 'm');
+         }
 
-           if (_pointer && !pointerIsValidFor(loc)) {
-             // if this pointer is no longer valid, clear it so another can be started
-             _pointer = undefined;
-           }
+         function change() {
+           var tag = {};
+           var primaryValue = utilGetSetValue(primaryInput).trim();
+           var secondaryValue = utilGetSetValue(secondaryInput).trim(); // don't override multiple values with blank string
 
-           if (!_pointer) {
-             _pointer = {
-               startLoc: loc,
-               startTime: new Date().getTime(),
-               upCount: 0,
-               pointerId: d3_event.pointerId
-             };
+           if (!primaryValue && !secondaryValue && Array.isArray(_tags[field.key])) return;
+
+           if (!primaryValue && !secondaryValue) {
+             tag[field.key] = undefined;
+           } else if (isNaN(primaryValue) || isNaN(secondaryValue) || !_isImperial) {
+             tag[field.key] = context.cleanTagValue(primaryValue);
            } else {
-             // double down
-             _pointer.pointerId = d3_event.pointerId;
+             if (primaryValue !== '') {
+               primaryValue = context.cleanTagValue(primaryValue + '\'');
+             }
+
+             if (secondaryValue !== '') {
+               secondaryValue = context.cleanTagValue(secondaryValue + '"');
+             }
+
+             tag[field.key] = primaryValue + secondaryValue;
            }
+
+           dispatch.call('change', this, tag);
          }
 
-         function pointerup(d3_event) {
-           // ignore right-click
-           if (d3_event.ctrlKey || d3_event.button === 2) return;
-           if (!_pointer || _pointer.pointerId !== d3_event.pointerId) return;
-           _pointer.upCount += 1;
+         roadheight.tags = function (tags) {
+           _tags = tags;
+           var primaryValue = tags[field.key];
+           var secondaryValue;
+           var isMixed = Array.isArray(primaryValue);
 
-           if (_pointer.upCount === 2) {
-             // double up!
-             var loc = [d3_event.clientX, d3_event.clientY];
+           if (!isMixed) {
+             if (primaryValue && (primaryValue.indexOf('\'') >= 0 || primaryValue.indexOf('"') >= 0)) {
+               secondaryValue = primaryValue.match(/(-?[\d.]+)"/);
 
-             if (pointerIsValidFor(loc)) {
-               var locInThis = utilFastMouse(this)(d3_event);
-               dispatch$1.call('doubleUp', this, d3_event, locInThis);
-             } // clear the pointer info in any case
+               if (secondaryValue !== null) {
+                 secondaryValue = secondaryValue[1];
+               }
 
+               primaryValue = primaryValue.match(/(-?[\d.]+)'/);
 
-             _pointer = undefined;
-           }
-         }
+               if (primaryValue !== null) {
+                 primaryValue = primaryValue[1];
+               }
 
-         function doubleUp(selection) {
-           if ('PointerEvent' in window) {
-             // dblclick isn't well supported on touch devices so manually use
-             // pointer events if they're available
-             selection.on('pointerdown.doubleUp', pointerdown).on('pointerup.doubleUp', pointerup);
-           } else {
-             // fallback to dblclick
-             selection.on('dblclick.doubleUp', function (d3_event) {
-               dispatch$1.call('doubleUp', this, d3_event, utilFastMouse(this)(d3_event));
-             });
+               _isImperial = true;
+             } else if (primaryValue) {
+               _isImperial = false;
+             }
            }
-         }
 
-         doubleUp.off = function (selection) {
-           selection.on('pointerdown.doubleUp', null).on('pointerup.doubleUp', null).on('dblclick.doubleUp', null);
+           setUnitSuggestions();
+           utilGetSetValue(primaryInput, typeof primaryValue === 'string' ? primaryValue : '').attr('title', isMixed ? primaryValue.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _t('inspector.unknown')).classed('mixed', isMixed);
+           utilGetSetValue(secondaryInput, typeof secondaryValue === 'string' ? secondaryValue : '').attr('placeholder', isMixed ? _t('inspector.multiple_values') : _isImperial ? '0' : null).classed('mixed', isMixed).classed('disabled', !_isImperial).attr('readonly', _isImperial ? null : 'readonly');
+           secondaryUnitInput.attr('value', _isImperial ? _t('inspector.roadheight.inch') : null);
          };
 
-         return utilRebind(doubleUp, dispatch$1, 'on');
-       }
-
-       var TILESIZE = 256;
-       var minZoom = 2;
-       var maxZoom = 24;
-       var kMin = geoZoomToScale(minZoom, TILESIZE);
-       var kMax = geoZoomToScale(maxZoom, TILESIZE);
-
-       function clamp(num, min, max) {
-         return Math.max(min, Math.min(num, max));
-       }
-
-       function rendererMap(context) {
-         var dispatch$1 = dispatch('move', 'drawn', 'crossEditableZoom', 'hitMinZoom', 'changeHighlighting', 'changeAreaFill');
-         var projection = context.projection;
-         var curtainProjection = context.curtainProjection;
-         var drawLayers;
-         var drawPoints;
-         var drawVertices;
-         var drawLines;
-         var drawAreas;
-         var drawMidpoints;
-         var drawLabels;
+         roadheight.focus = function () {
+           primaryInput.node().focus();
+         };
 
-         var _selection = select(null);
+         roadheight.entityIDs = function (val) {
+           _entityIDs = val;
+         };
 
-         var supersurface = select(null);
-         var wrapper = select(null);
-         var surface = select(null);
-         var _dimensions = [1, 1];
-         var _dblClickZoomEnabled = true;
-         var _redrawEnabled = true;
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-         var _gestureTransformStart;
+         return utilRebind(roadheight, dispatch, 'on');
+       }
 
-         var _transformStart = projection.transform();
+       function uiFieldRoadspeed(field, context) {
+         var dispatch = dispatch$8('change');
+         var unitInput = select(null);
+         var input = select(null);
+         var _entityIDs = [];
 
-         var _transformLast;
+         var _tags;
 
-         var _isTransformed = false;
-         var _minzoom = 0;
+         var _isImperial;
 
-         var _getMouseCoords;
+         var speedCombo = uiCombobox(context, 'roadspeed');
+         var unitCombo = uiCombobox(context, 'roadspeed-unit').data(['km/h', 'mph'].map(comboValues));
+         var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
+         var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
 
-         var _lastPointerEvent;
+         function roadspeed(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('input.roadspeed-number').data([0]);
+           input = input.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-number').attr('id', field.domId).call(utilNoAuto).call(speedCombo).merge(input);
+           input.on('change', change).on('blur', change);
+           var loc = combinedEntityExtent().center();
+           _isImperial = roadSpeedUnit(loc) === 'mph';
+           unitInput = wrap.selectAll('input.roadspeed-unit').data([0]);
+           unitInput = unitInput.enter().append('input').attr('type', 'text').attr('class', 'roadspeed-unit').attr('aria-label', _t('inspector.speed_unit')).call(unitCombo).merge(unitInput);
+           unitInput.on('blur', changeUnits).on('change', changeUnits);
 
-         var _lastWithinEditableZoom; // whether a pointerdown event started the zoom
+           function changeUnits() {
+             _isImperial = utilGetSetValue(unitInput) === 'mph';
+             utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+             setUnitSuggestions();
+             change();
+           }
+         }
 
+         function setUnitSuggestions() {
+           speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
+           utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+         }
 
-         var _pointerDown = false; // use pointer events on supported platforms; fallback to mouse events
+         function comboValues(d) {
+           return {
+             value: d.toString(),
+             title: d.toString()
+           };
+         }
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // use pointer event interaction if supported; fallback to touch/mouse events in d3-zoom
+         function change() {
+           var tag = {};
+           var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
 
+           if (!value && Array.isArray(_tags[field.key])) return;
 
-         var _zoomerPannerFunction = 'PointerEvent' in window ? utilZoomPan : d3_zoom;
+           if (!value) {
+             tag[field.key] = undefined;
+           } else if (isNaN(value) || !_isImperial) {
+             tag[field.key] = context.cleanTagValue(value);
+           } else {
+             tag[field.key] = context.cleanTagValue(value + ' mph');
+           }
 
-         var _zoomerPanner = _zoomerPannerFunction().scaleExtent([kMin, kMax]).interpolate(interpolate).filter(zoomEventFilter).on('zoom.map', zoomPan).on('start.map', function (d3_event) {
-           _pointerDown = d3_event && (d3_event.type === 'pointerdown' || d3_event.sourceEvent && d3_event.sourceEvent.type === 'pointerdown');
-         }).on('end.map', function () {
-           _pointerDown = false;
-         });
+           dispatch.call('change', this, tag);
+         }
 
-         var _doubleUpHandler = utilDoubleUp();
+         roadspeed.tags = function (tags) {
+           _tags = tags;
+           var value = tags[field.key];
+           var isMixed = Array.isArray(value);
 
-         var scheduleRedraw = throttle(redraw, 750); // var isRedrawScheduled = false;
-         // var pendingRedrawCall;
-         // function scheduleRedraw() {
-         //     // Only schedule the redraw if one has not already been set.
-         //     if (isRedrawScheduled) return;
-         //     isRedrawScheduled = true;
-         //     var that = this;
-         //     var args = arguments;
-         //     pendingRedrawCall = window.requestIdleCallback(function () {
-         //         // Reset the boolean so future redraws can be set.
-         //         isRedrawScheduled = false;
-         //         redraw.apply(that, args);
-         //     }, { timeout: 1400 });
-         // }
+           if (!isMixed) {
+             if (value && value.indexOf('mph') >= 0) {
+               value = parseInt(value, 10).toString();
+               _isImperial = true;
+             } else if (value) {
+               _isImperial = false;
+             }
+           }
 
+           setUnitSuggestions();
+           utilGetSetValue(input, typeof value === 'string' ? value : '').attr('title', isMixed ? value.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
+         };
 
-         function cancelPendingRedraw() {
-           scheduleRedraw.cancel(); // isRedrawScheduled = false;
-           // window.cancelIdleCallback(pendingRedrawCall);
-         }
+         roadspeed.focus = function () {
+           input.node().focus();
+         };
 
-         function map(selection) {
-           _selection = selection;
-           context.on('change.map', immediateRedraw);
-           var osm = context.connection();
+         roadspeed.entityIDs = function (val) {
+           _entityIDs = val;
+         };
 
-           if (osm) {
-             osm.on('change.map', immediateRedraw);
-           }
+         function combinedEntityExtent() {
+           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         }
 
-           function didUndoOrRedo(targetTransform) {
-             var mode = context.mode().id;
-             if (mode !== 'browse' && mode !== 'select') return;
+         return utilRebind(roadspeed, dispatch, 'on');
+       }
 
-             if (targetTransform) {
-               map.transformEase(targetTransform);
-             }
-           }
+       function uiFieldRadio(field, context) {
+         var dispatch = dispatch$8('change');
+         var placeholder = select(null);
+         var wrap = select(null);
+         var labels = select(null);
+         var radios = select(null);
+         var radioData = (field.options || field.keys).slice(); // shallow copy
 
-           context.history().on('merge.map', function () {
-             scheduleRedraw();
-           }).on('change.map', immediateRedraw).on('undone.map', function (stack, fromStack) {
-             didUndoOrRedo(fromStack.transform);
-           }).on('redone.map', function (stack) {
-             didUndoOrRedo(stack.transform);
-           });
-           context.background().on('change.map', immediateRedraw);
-           context.features().on('redraw.map', immediateRedraw);
-           drawLayers.on('change.map', function () {
-             context.background().updateImagery();
-             immediateRedraw();
-           });
-           selection.on('wheel.map mousewheel.map', function (d3_event) {
-             // disable swipe-to-navigate browser pages on trackpad/magic mouse – #5552
-             d3_event.preventDefault();
-           }).call(_zoomerPanner).call(_zoomerPanner.transform, projection.transform()).on('dblclick.zoom', null); // override d3-zoom dblclick handling
+         var typeField;
+         var layerField;
+         var _oldType = {};
+         var _entityIDs = [];
 
-           map.supersurface = supersurface = selection.append('div').attr('class', 'supersurface').call(utilSetTransform, 0, 0); // Need a wrapper div because Opera can't cope with an absolutely positioned
-           // SVG element: http://bl.ocks.org/jfirebaugh/6fbfbd922552bf776c16
+         function selectedKey() {
+           var node = wrap.selectAll('.form-field-input-radio label.active input');
+           return !node.empty() && node.datum();
+         }
 
-           wrapper = supersurface.append('div').attr('class', 'layer layer-data');
-           map.surface = surface = wrapper.call(drawLayers).selectAll('.surface');
-           surface.call(drawLabels.observe).call(_doubleUpHandler).on(_pointerPrefix + 'down.zoom', function (d3_event) {
-             _lastPointerEvent = d3_event;
+         function radio(selection) {
+           selection.classed('preset-radio', true);
+           wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           var enter = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-radio');
+           enter.append('span').attr('class', 'placeholder');
+           wrap = wrap.merge(enter);
+           placeholder = wrap.selectAll('.placeholder');
+           labels = wrap.selectAll('label').data(radioData);
+           enter = labels.enter().append('label');
+           enter.append('input').attr('type', 'radio').attr('name', field.id).attr('value', function (d) {
+             return field.t('options.' + d, {
+               'default': d
+             });
+           }).attr('checked', false);
+           enter.append('span').html(function (d) {
+             return field.t.html('options.' + d, {
+               'default': d
+             });
+           });
+           labels = labels.merge(enter);
+           radios = labels.selectAll('input').on('change', changeRadio);
+         }
 
-             if (d3_event.button === 2) {
-               d3_event.stopPropagation();
-             }
-           }, true).on(_pointerPrefix + 'up.zoom', function (d3_event) {
-             _lastPointerEvent = d3_event;
+         function structureExtras(selection, tags) {
+           var selected = selectedKey() || tags.layer !== undefined;
+           var type = _mainPresetIndex.field(selected);
+           var layer = _mainPresetIndex.field('layer');
+           var showLayer = selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined;
+           var extrasWrap = selection.selectAll('.structure-extras-wrap').data(selected ? [0] : []);
+           extrasWrap.exit().remove();
+           extrasWrap = extrasWrap.enter().append('div').attr('class', 'structure-extras-wrap').merge(extrasWrap);
+           var list = extrasWrap.selectAll('ul').data([0]);
+           list = list.enter().append('ul').attr('class', 'rows').merge(list); // Type
 
-             if (resetTransform()) {
-               immediateRedraw();
-             }
-           }).on(_pointerPrefix + 'move.map', function (d3_event) {
-             _lastPointerEvent = d3_event;
-           }).on(_pointerPrefix + 'over.vertices', function (d3_event) {
-             if (map.editableDataEnabled() && !_isTransformed) {
-               var hover = d3_event.target.__data__;
-               surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-               dispatch$1.call('drawn', this, {
-                 full: false
-               });
-             }
-           }).on(_pointerPrefix + 'out.vertices', function (d3_event) {
-             if (map.editableDataEnabled() && !_isTransformed) {
-               var hover = d3_event.relatedTarget && d3_event.relatedTarget.__data__;
-               surface.call(drawVertices.drawHover, context.graph(), hover, map.extent());
-               dispatch$1.call('drawn', this, {
-                 full: false
-               });
+           if (type) {
+             if (!typeField || typeField.id !== selected) {
+               typeField = uiField(context, type, _entityIDs, {
+                 wrap: false
+               }).on('change', changeType);
              }
-           });
-           var detected = utilDetect(); // only WebKit supports gesture events
 
-           if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-           // but we only need to do this on desktop Safari anyway. – #7694
-           !detected.isMobileWebKit) {
-             // Desktop Safari sends gesture events for multitouch trackpad pinches.
-             // We can listen for these and translate them into map zooms.
-             surface.on('gesturestart.surface', function (d3_event) {
-               d3_event.preventDefault();
-               _gestureTransformStart = projection.transform();
-             }).on('gesturechange.surface', gestureChange);
-           } // must call after surface init
+             typeField.tags(tags);
+           } else {
+             typeField = null;
+           }
 
+           var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
+             return d.id;
+           }); // Exit
 
-           updateAreaFill();
+           typeItem.exit().remove(); // Enter
 
-           _doubleUpHandler.on('doubleUp.map', function (d3_event, p0) {
-             if (!_dblClickZoomEnabled) return; // don't zoom if targeting something other than the map itself
+           var typeEnter = typeItem.enter().insert('li', ':first-child').attr('class', 'labeled-input structure-type-item');
+           typeEnter.append('span').attr('class', 'label structure-label-type').attr('for', 'preset-input-' + selected).call(_t.append('inspector.radio.structure.type'));
+           typeEnter.append('div').attr('class', 'structure-input-type-wrap'); // Update
 
-             if (_typeof(d3_event.target.__data__) === 'object' && // or area fills
-             !select(d3_event.target).classed('fill')) return;
-             var zoomOut = d3_event.shiftKey;
-             var t = projection.transform();
-             var p1 = t.invert(p0);
-             t = t.scale(zoomOut ? 0.5 : 2);
-             t.x = p0[0] - p1[0] * t.k;
-             t.y = p0[1] - p1[1] * t.k;
-             map.transformEase(t);
-           });
+           typeItem = typeItem.merge(typeEnter);
 
-           context.on('enter.map', function () {
-             if (!map.editableDataEnabled(true
-             /* skip zoom check */
-             )) return; // redraw immediately any objects affected by a change in selectedIDs.
+           if (typeField) {
+             typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
+           } // Layer
 
-             var graph = context.graph();
-             var selectedAndParents = {};
-             context.selectedIDs().forEach(function (id) {
-               var entity = graph.hasEntity(id);
 
-               if (entity) {
-                 selectedAndParents[entity.id] = entity;
+           if (layer && showLayer) {
+             if (!layerField) {
+               layerField = uiField(context, layer, _entityIDs, {
+                 wrap: false
+               }).on('change', changeLayer);
+             }
 
-                 if (entity.type === 'node') {
-                   graph.parentWays(entity).forEach(function (parent) {
-                     selectedAndParents[parent.id] = parent;
-                   });
-                 }
-               }
+             layerField.tags(tags);
+             field.keys = utilArrayUnion(field.keys, ['layer']);
+           } else {
+             layerField = null;
+             field.keys = field.keys.filter(function (k) {
+               return k !== 'layer';
              });
-             var data = Object.values(selectedAndParents);
+           }
 
-             var filter = function filter(d) {
-               return d.id in selectedAndParents;
-             };
+           var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
 
-             data = context.features().filter(data, graph);
-             surface.call(drawVertices.drawSelected, graph, map.extent()).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent());
-             dispatch$1.call('drawn', this, {
-               full: false
-             }); // redraw everything else later
+           layerItem.exit().remove(); // Enter
 
-             scheduleRedraw();
-           });
-           map.dimensions(utilGetDimensions(selection));
-         }
+           var layerEnter = layerItem.enter().append('li').attr('class', 'labeled-input structure-layer-item');
+           layerEnter.append('span').attr('class', 'label structure-label-layer').attr('for', 'preset-input-layer').call(_t.append('inspector.radio.structure.layer'));
+           layerEnter.append('div').attr('class', 'structure-input-layer-wrap'); // Update
 
-         function zoomEventFilter(d3_event) {
-           // Fix for #2151, (see also d3/d3-zoom#60, d3/d3-brush#18)
-           // Intercept `mousedown` and check if there is an orphaned zoom gesture.
-           // This can happen if a previous `mousedown` occurred without a `mouseup`.
-           // If we detect this, dispatch `mouseup` to complete the orphaned gesture,
-           // so that d3-zoom won't stop propagation of new `mousedown` events.
-           if (d3_event.type === 'mousedown') {
-             var hasOrphan = false;
-             var listeners = window.__on;
+           layerItem = layerItem.merge(layerEnter);
 
-             for (var i = 0; i < listeners.length; i++) {
-               var listener = listeners[i];
+           if (layerField) {
+             layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
+           }
+         }
 
-               if (listener.name === 'zoom' && listener.type === 'mouseup') {
-                 hasOrphan = true;
-                 break;
-               }
-             }
+         function changeType(t, onInput) {
+           var key = selectedKey();
+           if (!key) return;
+           var val = t[key];
 
-             if (hasOrphan) {
-               var event = window.CustomEvent;
+           if (val !== 'no') {
+             _oldType[key] = val;
+           }
 
-               if (event) {
-                 event = new event('mouseup');
-               } else {
-                 event = window.document.createEvent('Event');
-                 event.initEvent('mouseup', false, false);
-               } // Event needs to be dispatched with an event.view property.
+           if (field.type === 'structureRadio') {
+             // remove layer if it should not be set
+             if (val === 'no' || key !== 'bridge' && key !== 'tunnel' || key === 'tunnel' && val === 'building_passage') {
+               t.layer = undefined;
+             } // add layer if it should be set
 
 
-               event.view = window;
-               window.dispatchEvent(event);
+             if (t.layer === undefined) {
+               if (key === 'bridge' && val !== 'no') {
+                 t.layer = '1';
+               }
+
+               if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
+                 t.layer = '-1';
+               }
              }
            }
 
-           return d3_event.button !== 2; // ignore right clicks
+           dispatch.call('change', this, t, onInput);
          }
 
-         function pxCenter() {
-           return [_dimensions[0] / 2, _dimensions[1] / 2];
-         }
+         function changeLayer(t, onInput) {
+           if (t.layer === '0') {
+             t.layer = undefined;
+           }
 
-         function drawEditable(difference, extent) {
-           var mode = context.mode();
-           var graph = context.graph();
-           var features = context.features();
-           var all = context.history().intersects(map.extent());
-           var fullRedraw = false;
-           var data;
-           var set;
-           var filter;
-           var applyFeatureLayerFilters = true;
+           dispatch.call('change', this, t, onInput);
+         }
 
-           if (map.isInWideSelection()) {
-             data = [];
-             utilEntityAndDeepMemberIDs(mode.selectedIDs(), context.graph()).forEach(function (id) {
-               var entity = context.hasEntity(id);
-               if (entity) data.push(entity);
-             });
-             fullRedraw = true;
-             filter = utilFunctor(true); // selected features should always be visible, so we can skip filtering
+         function changeRadio() {
+           var t = {};
+           var activeKey;
 
-             applyFeatureLayerFilters = false;
-           } else if (difference) {
-             var complete = difference.complete(map.extent());
-             data = Object.values(complete).filter(Boolean);
-             set = new Set(Object.keys(complete));
+           if (field.key) {
+             t[field.key] = undefined;
+           }
 
-             filter = function filter(d) {
-               return set.has(d.id);
-             };
+           radios.each(function (d) {
+             var active = select(this).property('checked');
+             if (active) activeKey = d;
 
-             features.clear(data);
-           } else {
-             // force a full redraw if gatherStats detects that a feature
-             // should be auto-hidden (e.g. points or buildings)..
-             if (features.gatherStats(all, graph, _dimensions)) {
-               extent = undefined;
+             if (field.key) {
+               if (active) t[field.key] = d;
+             } else {
+               var val = _oldType[activeKey] || 'yes';
+               t[d] = active ? val : undefined;
              }
+           });
 
-             if (extent) {
-               data = context.history().intersects(map.extent().intersection(extent));
-               set = new Set(data.map(function (entity) {
-                 return entity.id;
-               }));
-
-               filter = function filter(d) {
-                 return set.has(d.id);
-               };
+           if (field.type === 'structureRadio') {
+             if (activeKey === 'bridge') {
+               t.layer = '1';
+             } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
+               t.layer = '-1';
              } else {
-               data = all;
-               fullRedraw = true;
-               filter = utilFunctor(true);
+               t.layer = undefined;
              }
            }
 
-           if (applyFeatureLayerFilters) {
-             data = features.filter(data, graph);
-           } else {
-             context.features().resetStats();
+           dispatch.call('change', this, t);
+         }
+
+         radio.tags = function (tags) {
+           function isOptionChecked(d) {
+             if (field.key) {
+               return tags[field.key] === d;
+             }
+
+             return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
            }
 
-           if (mode && mode.id === 'select') {
-             // update selected vertices - the user might have just double-clicked a way,
-             // creating a new vertex, triggering a partial redraw without a mode change
-             surface.call(drawVertices.drawSelected, graph, map.extent());
+           function isMixed(d) {
+             if (field.key) {
+               return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
+             }
+
+             return Array.isArray(tags[d]);
            }
 
-           surface.call(drawVertices, graph, data, filter, map.extent(), fullRedraw).call(drawLines, graph, data, filter).call(drawAreas, graph, data, filter).call(drawMidpoints, graph, data, filter, map.trimmedExtent()).call(drawLabels, graph, data, filter, _dimensions, fullRedraw).call(drawPoints, graph, data, filter);
-           dispatch$1.call('drawn', this, {
-             full: true
+           radios.property('checked', function (d) {
+             return isOptionChecked(d) && (field.key || field.options.filter(isOptionChecked).length === 1);
            });
-         }
-
-         map.init = function () {
-           drawLayers = svgLayers(projection, context);
-           drawPoints = svgPoints(projection, context);
-           drawVertices = svgVertices(projection, context);
-           drawLines = svgLines(projection, context);
-           drawAreas = svgAreas(projection, context);
-           drawMidpoints = svgMidpoints(projection, context);
-           drawLabels = svgLabels(projection, context);
-         };
+           labels.classed('active', function (d) {
+             if (field.key) {
+               return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
+             }
 
-         function editOff() {
-           context.features().resetStats();
-           surface.selectAll('.layer-osm *').remove();
-           surface.selectAll('.layer-touch:not(.markers) *').remove();
-           var allowed = {
-             'browse': true,
-             'save': true,
-             'select-note': true,
-             'select-data': true,
-             'select-error': true
-           };
-           var mode = context.mode();
+             return Array.isArray(tags[d]) && tags[d].some(function (v) {
+               return typeof v === 'string' && v.toLowerCase() !== 'no';
+             }) || !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
+           }).classed('mixed', isMixed).attr('title', function (d) {
+             return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
+           });
+           var selection = radios.filter(function () {
+             return this.checked;
+           });
 
-           if (mode && !allowed[mode.id]) {
-             context.enter(modeBrowse(context));
+           if (selection.empty()) {
+             placeholder.call(_t.append('inspector.none'));
+           } else {
+             placeholder.text(selection.attr('value'));
+             _oldType[selection.datum()] = tags[selection.datum()];
            }
 
-           dispatch$1.call('drawn', this, {
-             full: true
-           });
-         }
-
-         function gestureChange(d3_event) {
-           // Remap Safari gesture events to wheel events - #5492
-           // We want these disabled most places, but enabled for zoom/unzoom on map surface
-           // https://developer.mozilla.org/en-US/docs/Web/API/GestureEvent
-           var e = d3_event;
-           e.preventDefault();
-           var props = {
-             deltaMode: 0,
-             // dummy values to ignore in zoomPan
-             deltaY: 1,
-             // dummy values to ignore in zoomPan
-             clientX: e.clientX,
-             clientY: e.clientY,
-             screenX: e.screenX,
-             screenY: e.screenY,
-             x: e.x,
-             y: e.y
-           };
-           var e2 = new WheelEvent('wheel', props);
-           e2._scale = e.scale; // preserve the original scale
+           if (field.type === 'structureRadio') {
+             // For waterways without a tunnel tag, set 'culvert' as
+             // the _oldType to default to if the user picks 'tunnel'
+             if (!!tags.waterway && !_oldType.tunnel) {
+               _oldType.tunnel = 'culvert';
+             }
 
-           e2._rotation = e.rotation; // preserve the original rotation
+             wrap.call(structureExtras, tags);
+           }
+         };
 
-           _selection.node().dispatchEvent(e2);
-         }
+         radio.focus = function () {
+           radios.node().focus();
+         };
 
-         function zoomPan(event, key, transform) {
-           var source = event && event.sourceEvent || event;
-           var eventTransform = transform || event && event.transform;
-           var x = eventTransform.x;
-           var y = eventTransform.y;
-           var k = eventTransform.k; // Special handling of 'wheel' events:
-           // They might be triggered by the user scrolling the mouse wheel,
-           // or 2-finger pinch/zoom gestures, the transform may need adjustment.
+         radio.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _oldType = {};
+           return radio;
+         };
 
-           if (source && source.type === 'wheel') {
-             // assume that the gesture is already handled by pointer events
-             if (_pointerDown) return;
-             var detected = utilDetect();
-             var dX = source.deltaX;
-             var dY = source.deltaY;
-             var x2 = x;
-             var y2 = y;
-             var k2 = k;
-             var t0, p0, p1; // Normalize mousewheel scroll speed (Firefox) - #3029
-             // If wheel delta is provided in LINE units, recalculate it in PIXEL units
-             // We are essentially redoing the calculations that occur here:
-             //   https://github.com/d3/d3-zoom/blob/78563a8348aa4133b07cac92e2595c2227ca7cd7/src/zoom.js#L203
-             // See this for more info:
-             //   https://github.com/basilfx/normalize-wheel/blob/master/src/normalizeWheel.js
+         radio.isAllowed = function () {
+           return _entityIDs.length === 1;
+         };
 
-             if (source.deltaMode === 1
-             /* LINE */
-             ) {
-                 // Convert from lines to pixels, more if the user is scrolling fast.
-                 // (I made up the exp function to roughly match Firefox to what Chrome does)
-                 // These numbers should be floats, because integers are treated as pan gesture below.
-                 var lines = Math.abs(source.deltaY);
-                 var sign = source.deltaY > 0 ? 1 : -1;
-                 dY = sign * clamp(Math.exp((lines - 1) * 0.75) * 4.000244140625, 4.000244140625, // min
-                 350.000244140625 // max
-                 ); // On Firefox Windows and Linux we always get +/- the scroll line amount (default 3)
-                 // There doesn't seem to be any scroll acceleration.
-                 // This multiplier increases the speed a little bit - #5512
-
-                 if (detected.os !== 'mac') {
-                   dY *= 5;
-                 } // recalculate x2,y2,k2
-
-
-                 t0 = _isTransformed ? _transformLast : _transformStart;
-                 p0 = _getMouseCoords(source);
-                 p1 = t0.invert(p0);
-                 k2 = t0.k * Math.pow(2, -dY / 500);
-                 k2 = clamp(k2, kMin, kMax);
-                 x2 = p0[0] - p1[0] * k2;
-                 y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (Safari) - #5492
-                 // These are fake `wheel` events we made from Safari `gesturechange` events..
-               } else if (source._scale) {
-               // recalculate x2,y2,k2
-               t0 = _gestureTransformStart;
-               p0 = _getMouseCoords(source);
-               p1 = t0.invert(p0);
-               k2 = t0.k * source._scale;
-               k2 = clamp(k2, kMin, kMax);
-               x2 = p0[0] - p1[0] * k2;
-               y2 = p0[1] - p1[1] * k2; // 2 finger map pinch zooming (all browsers except Safari) - #5492
-               // Pinch zooming via the `wheel` event will always have:
-               // - `ctrlKey = true`
-               // - `deltaY` is not round integer pixels (ignore `deltaX`)
-             } else if (source.ctrlKey && !isInteger(dY)) {
-               dY *= 6; // slightly scale up whatever the browser gave us
-               // recalculate x2,y2,k2
+         return utilRebind(radio, dispatch, 'on');
+       }
 
-               t0 = _isTransformed ? _transformLast : _transformStart;
-               p0 = _getMouseCoords(source);
-               p1 = t0.invert(p0);
-               k2 = t0.k * Math.pow(2, -dY / 500);
-               k2 = clamp(k2, kMin, kMax);
-               x2 = p0[0] - p1[0] * k2;
-               y2 = p0[1] - p1[1] * k2; // Trackpad scroll zooming with shift or alt/option key down
-             } else if ((source.altKey || source.shiftKey) && isInteger(dY)) {
-               // recalculate x2,y2,k2
-               t0 = _isTransformed ? _transformLast : _transformStart;
-               p0 = _getMouseCoords(source);
-               p1 = t0.invert(p0);
-               k2 = t0.k * Math.pow(2, -dY / 500);
-               k2 = clamp(k2, kMin, kMax);
-               x2 = p0[0] - p1[0] * k2;
-               y2 = p0[1] - p1[1] * k2; // 2 finger map panning (Mac only, all browsers) - #5492, #5512
-               // Panning via the `wheel` event will always have:
-               // - `ctrlKey = false`
-               // - `deltaX`,`deltaY` are round integer pixels
-             } else if (detected.os === 'mac' && !source.ctrlKey && isInteger(dX) && isInteger(dY)) {
-               p1 = projection.translate();
-               x2 = p1[0] - dX;
-               y2 = p1[1] - dY;
-               k2 = projection.scale();
-               k2 = clamp(k2, kMin, kMax);
-             } // something changed - replace the event transform
+       function uiFieldRestrictions(field, context) {
+         var dispatch = dispatch$8('change');
+         var breathe = behaviorBreathe();
+         corePreferences('turn-restriction-via-way', null); // remove old key
 
+         var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
 
-             if (x2 !== x || y2 !== y || k2 !== k) {
-               x = x2;
-               y = y2;
-               k = k2;
-               eventTransform = identity$2.translate(x2, y2).scale(k2);
+         var storedDistance = corePreferences('turn-restriction-distance');
 
-               if (_zoomerPanner._transform) {
-                 // utilZoomPan interface
-                 _zoomerPanner._transform(eventTransform);
-               } else {
-                 // d3_zoom interface
-                 _selection.node().__zoom = eventTransform;
-               }
-             }
-           }
+         var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
 
-           if (_transformStart.x === x && _transformStart.y === y && _transformStart.k === k) {
-             return; // no change
-           }
+         var _maxDistance = storedDistance ? +storedDistance : 30;
 
-           var withinEditableZoom = map.withinEditableZoom();
+         var _initialized = false;
 
-           if (_lastWithinEditableZoom !== withinEditableZoom) {
-             if (_lastWithinEditableZoom !== undefined) {
-               // notify that the map zoomed in or out over the editable zoom threshold
-               dispatch$1.call('crossEditableZoom', this, withinEditableZoom);
-             }
+         var _parent = select(null); // the entire field
 
-             _lastWithinEditableZoom = withinEditableZoom;
-           }
 
-           if (geoScaleToZoom(k, TILESIZE) < _minzoom) {
-             surface.interrupt();
-             dispatch$1.call('hitMinZoom', this, map);
-             setCenterZoom(map.center(), context.minEditableZoom(), 0, true);
-             scheduleRedraw();
-             dispatch$1.call('move', this, map);
-             return;
-           }
+         var _container = select(null); // just the map
 
-           projection.transform(eventTransform);
-           var scale = k / _transformStart.k;
-           var tX = (x / scale - _transformStart.x) * scale;
-           var tY = (y / scale - _transformStart.y) * scale;
 
-           if (context.inIntro()) {
-             curtainProjection.transform({
-               x: x - tX,
-               y: y - tY,
-               k: k
-             });
-           }
+         var _oldTurns;
 
-           if (source) {
-             _lastPointerEvent = event;
-           }
+         var _graph;
 
-           _isTransformed = true;
-           _transformLast = eventTransform;
-           utilSetTransform(supersurface, tX, tY, scale);
-           scheduleRedraw();
-           dispatch$1.call('move', this, map);
+         var _vertexID;
 
-           function isInteger(val) {
-             return typeof val === 'number' && isFinite(val) && Math.floor(val) === val;
-           }
-         }
+         var _intersection;
 
-         function resetTransform() {
-           if (!_isTransformed) return false;
-           utilSetTransform(supersurface, 0, 0);
-           _isTransformed = false;
+         var _fromWayID;
 
-           if (context.inIntro()) {
-             curtainProjection.transform(projection.transform());
-           }
+         var _lastXPos;
 
-           return true;
-         }
+         function restrictions(selection) {
+           _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
 
-         function redraw(difference, extent) {
-           if (surface.empty() || !_redrawEnabled) return; // If we are in the middle of a zoom/pan, we can't do differenced redraws.
-           // It would result in artifacts where differenced entities are redrawn with
-           // one transform and unchanged entities with another.
+           if (_vertexID && (context.graph() !== _graph || !_intersection)) {
+             _graph = context.graph();
+             _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
+           } // It's possible for there to be no actual intersection here.
+           // for example, a vertex of two `highway=path`
+           // In this case, hide the field.
 
-           if (resetTransform()) {
-             difference = extent = undefined;
+
+           var isOK = _intersection && _intersection.vertices.length && // has vertices
+           _intersection.vertices // has the vertex that the user selected
+           .filter(function (vertex) {
+             return vertex.id === _vertexID;
+           }).length && _intersection.ways.length > 2 && // has more than 2 ways
+           _intersection.ways // has more than 1 TO way
+           .filter(function (way) {
+             return way.__to;
+           }).length > 1; // Also hide in the case where
+
+           select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
+
+           if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
+             selection.call(restrictions.off);
+             return;
            }
 
-           var zoom = map.zoom();
-           var z = String(~~zoom);
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var container = wrap.selectAll('.restriction-container').data([0]); // enter
 
-           if (surface.attr('data-zoom') !== z) {
-             surface.attr('data-zoom', z);
-           } // class surface as `lowzoom` around z17-z18.5 (based on latitude)
+           var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
+           containerEnter.append('div').attr('class', 'restriction-help'); // update
 
+           _container = containerEnter.merge(container).call(renderViewer);
+           var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
 
-           var lat = map.center()[1];
-           var lowzoom = linear$2().domain([-60, 0, 60]).range([17, 18.5, 17]).clamp(true);
-           surface.classed('low-zoom', zoom <= lowzoom(lat));
+           controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+         }
 
-           if (!difference) {
-             supersurface.call(context.background());
-             wrapper.call(drawLayers);
-           } // OSM
+         function renderControls(selection) {
+           var distControl = selection.selectAll('.restriction-distance').data([0]);
+           distControl.exit().remove();
+           var distControlEnter = distControl.enter().append('div').attr('class', 'restriction-control restriction-distance');
+           distControlEnter.append('span').attr('class', 'restriction-control-label restriction-distance-label').call(_t.append('restriction.controls.distance', {
+             suffix: ':'
+           }));
+           distControlEnter.append('input').attr('class', 'restriction-distance-input').attr('type', 'range').attr('min', '20').attr('max', '50').attr('step', '5');
+           distControlEnter.append('span').attr('class', 'restriction-distance-text'); // update
 
+           selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
+             var val = select(this).property('value');
+             _maxDistance = +val;
+             _intersection = null;
 
-           if (map.editableDataEnabled() || map.isInWideSelection()) {
-             context.loadTiles(projection);
-             drawEditable(difference, extent);
-           } else {
-             editOff();
-           }
+             _container.selectAll('.layer-osm .layer-turns *').remove();
 
-           _transformStart = projection.transform();
-           return map;
-         }
+             corePreferences('turn-restriction-distance', _maxDistance);
 
-         var immediateRedraw = function immediateRedraw(difference, extent) {
-           if (!difference && !extent) cancelPendingRedraw();
-           redraw(difference, extent);
-         };
+             _parent.call(restrictions);
+           });
+           selection.selectAll('.restriction-distance-text').call(displayMaxDistance(_maxDistance));
+           var viaControl = selection.selectAll('.restriction-via-way').data([0]);
+           viaControl.exit().remove();
+           var viaControlEnter = viaControl.enter().append('div').attr('class', 'restriction-control restriction-via-way');
+           viaControlEnter.append('span').attr('class', 'restriction-control-label restriction-via-way-label').call(_t.append('restriction.controls.via', {
+             suffix: ':'
+           }));
+           viaControlEnter.append('input').attr('class', 'restriction-via-way-input').attr('type', 'range').attr('min', '0').attr('max', '2').attr('step', '1');
+           viaControlEnter.append('span').attr('class', 'restriction-via-way-text'); // update
 
-         map.lastPointerEvent = function () {
-           return _lastPointerEvent;
-         };
+           selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
+             var val = select(this).property('value');
+             _maxViaWay = +val;
 
-         map.mouse = function (d3_event) {
-           var event = _lastPointerEvent || d3_event;
+             _container.selectAll('.layer-osm .layer-turns *').remove();
 
-           if (event) {
-             var s;
+             corePreferences('turn-restriction-via-way0', _maxViaWay);
 
-             while (s = event.sourceEvent) {
-               event = s;
-             }
+             _parent.call(restrictions);
+           });
+           selection.selectAll('.restriction-via-way-text').call(displayMaxVia(_maxViaWay));
+         }
 
-             return _getMouseCoords(event);
-           }
+         function renderViewer(selection) {
+           if (!_intersection) return;
+           var vgraph = _intersection.graph;
+           var filter = utilFunctor(true);
+           var projection = geoRawMercator(); // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
+           // Instead of asking the restriction-container for its dimensions,
+           //  we can ask the .sidebar, which can have its dimensions cached.
+           // width: calc as sidebar - padding
+           // height: hardcoded (from `80_app.css`)
+           // var d = utilGetDimensions(selection);
 
-           return null;
-         }; // returns Lng/Lat
+           var sdims = utilGetDimensions(context.container().select('.sidebar'));
+           var d = [sdims[0] - 50, 370];
+           var c = geoVecScale(d, 0.5);
+           var z = 22;
+           projection.scale(geoZoomToScale(z)); // Calculate extent of all key vertices
 
+           var extent = geoExtent();
 
-         map.mouseCoordinates = function () {
-           var coord = map.mouse() || pxCenter();
-           return projection.invert(coord);
-         };
+           for (var i = 0; i < _intersection.vertices.length; i++) {
+             extent._extend(_intersection.vertices[i].extent());
+           }
 
-         map.dblclickZoomEnable = function (val) {
-           if (!arguments.length) return _dblClickZoomEnabled;
-           _dblClickZoomEnabled = val;
-           return map;
-         };
+           var padTop = 35; // reserve top space for hint text
+           // If this is a large intersection, adjust zoom to fit extent
 
-         map.redrawEnable = function (val) {
-           if (!arguments.length) return _redrawEnabled;
-           _redrawEnabled = val;
-           return map;
-         };
+           if (_intersection.vertices.length > 1) {
+             var hPadding = Math.min(160, Math.max(110, d[0] * 0.4));
+             var vPadding = 160;
+             var tl = projection([extent[0][0], extent[1][1]]);
+             var br = projection([extent[1][0], extent[0][1]]);
+             var hFactor = (br[0] - tl[0]) / (d[0] - hPadding);
+             var vFactor = (br[1] - tl[1]) / (d[1] - vPadding - padTop);
+             var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
+             var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
+             z = z - Math.max(hZoomDiff, vZoomDiff);
+             projection.scale(geoZoomToScale(z));
+           }
 
-         map.isTransformed = function () {
-           return _isTransformed;
-         };
+           var extentCenter = projection(extent.center());
+           extentCenter[1] = extentCenter[1] - padTop / 2;
+           projection.translate(geoVecSubtract(c, extentCenter)).clipExtent([[0, 0], d]);
+           var drawLayers = svgLayers(projection, context).only(['osm', 'touch']).dimensions(d);
+           var drawVertices = svgVertices(projection, context);
+           var drawLines = svgLines(projection, context);
+           var drawTurns = svgTurns(projection, context);
+           var firstTime = selection.selectAll('.surface').empty();
+           selection.call(drawLayers);
+           var surface = selection.selectAll('.surface').classed('tr', true);
 
-         function setTransform(t2, duration, force) {
-           var t = projection.transform();
-           if (!force && t2.k === t.k && t2.x === t.x && t2.y === t.y) return false;
+           if (firstTime) {
+             _initialized = true;
+             surface.call(breathe);
+           } // This can happen if we've lowered the detail while a FROM way
+           // is selected, and that way is no longer part of the intersection.
 
-           if (duration) {
-             _selection.transition().duration(duration).on('start', function () {
-               map.startEase();
-             }).call(_zoomerPanner.transform, identity$2.translate(t2.x, t2.y).scale(t2.k));
-           } else {
-             projection.transform(t2);
-             _transformStart = t2;
 
-             _selection.call(_zoomerPanner.transform, _transformStart);
+           if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
+             _fromWayID = null;
+             _oldTurns = null;
            }
 
-           return true;
-         }
+           surface.call(utilSetDimensions, d).call(drawVertices, vgraph, _intersection.vertices, filter, extent, z).call(drawLines, vgraph, _intersection.ways, filter).call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
+           surface.on('click.restrictions', click).on('mouseover.restrictions', mouseover);
+           surface.selectAll('.selected').classed('selected', false);
+           surface.selectAll('.related').classed('related', false);
+           var way;
 
-         function setCenterZoom(loc2, z2, duration, force) {
-           var c = map.center();
-           var z = map.zoom();
-           if (loc2[0] === c[0] && loc2[1] === c[1] && z2 === z && !force) return false;
-           var proj = geoRawMercator().transform(projection.transform()); // copy projection
+           if (_fromWayID) {
+             way = vgraph.entity(_fromWayID);
+             surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+           }
 
-           var k2 = clamp(geoZoomToScale(z2, TILESIZE), kMin, kMax);
-           proj.scale(k2);
-           var t = proj.translate();
-           var point = proj(loc2);
-           var center = pxCenter();
-           t[0] += center[0] - point[0];
-           t[1] += center[1] - point[1];
-           return setTransform(identity$2.translate(t[0], t[1]).scale(k2), duration, force);
-         }
+           document.addEventListener('resizeWindow', function () {
+             utilSetDimensions(_container, null);
+             redraw(1);
+           }, false);
+           updateHints(null);
 
-         map.pan = function (delta, duration) {
-           var t = projection.translate();
-           var k = projection.scale();
-           t[0] += delta[0];
-           t[1] += delta[1];
+           function click(d3_event) {
+             surface.call(breathe.off).call(breathe);
+             var datum = d3_event.target.__data__;
+             var entity = datum && datum.properties && datum.properties.entity;
 
-           if (duration) {
-             _selection.transition().duration(duration).on('start', function () {
-               map.startEase();
-             }).call(_zoomerPanner.transform, identity$2.translate(t[0], t[1]).scale(k));
-           } else {
-             projection.translate(t);
-             _transformStart = projection.transform();
+             if (entity) {
+               datum = entity;
+             }
 
-             _selection.call(_zoomerPanner.transform, _transformStart);
+             if (datum instanceof osmWay && (datum.__from || datum.__via)) {
+               _fromWayID = datum.id;
+               _oldTurns = null;
+               redraw();
+             } else if (datum instanceof osmTurn) {
+               var actions, extraActions, turns, i;
+               var restrictionType = osmInferRestriction(vgraph, datum, projection);
 
-             dispatch$1.call('move', this, map);
-             immediateRedraw();
-           }
+               if (datum.restrictionID && !datum.direct) {
+                 return;
+               } else if (datum.restrictionID && !datum.only) {
+                 // NO -> ONLY
+                 var seen = {};
+                 var datumOnly = JSON.parse(JSON.stringify(datum)); // deep clone the datum
 
-           return map;
-         };
+                 datumOnly.only = true; // but change this property
 
-         map.dimensions = function (val) {
-           if (!arguments.length) return _dimensions;
-           _dimensions = val;
-           drawLayers.dimensions(_dimensions);
-           context.background().dimensions(_dimensions);
-           projection.clipExtent([[0, 0], _dimensions]);
-           _getMouseCoords = utilFastMouse(supersurface.node());
-           scheduleRedraw();
-           return map;
-         };
+                 restrictionType = restrictionType.replace(/^no/, 'only'); // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
+                 // We will remember them in _oldTurns, and restore them if the user clicks again.
 
-         function zoomIn(delta) {
-           setCenterZoom(map.center(), ~~map.zoom() + delta, 250, true);
-         }
+                 turns = _intersection.turns(_fromWayID, 2);
+                 extraActions = [];
+                 _oldTurns = [];
 
-         function zoomOut(delta) {
-           setCenterZoom(map.center(), ~~map.zoom() - delta, 250, true);
-         }
+                 for (i = 0; i < turns.length; i++) {
+                   var turn = turns[i];
+                   if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
 
-         map.zoomIn = function () {
-           zoomIn(1);
-         };
+                   if (turn.direct && turn.path[1] === datum.path[1]) {
+                     seen[turns[i].restrictionID] = true;
+                     turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
 
-         map.zoomInFurther = function () {
-           zoomIn(4);
-         };
+                     _oldTurns.push(turn);
 
-         map.canZoomIn = function () {
-           return map.zoom() < maxZoom;
-         };
+                     extraActions.push(actionUnrestrictTurn(turn));
+                   }
+                 }
 
-         map.zoomOut = function () {
-           zoomOut(1);
-         };
+                 actions = _intersection.actions.concat(extraActions, [actionRestrictTurn(datumOnly, restrictionType), _t('operations.restriction.annotation.create')]);
+               } else if (datum.restrictionID) {
+                 // ONLY -> Allowed
+                 // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
+                 // This relies on the assumption that the intersection was already split up when we
+                 // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
+                 turns = _oldTurns || [];
+                 extraActions = [];
 
-         map.zoomOutFurther = function () {
-           zoomOut(4);
-         };
+                 for (i = 0; i < turns.length; i++) {
+                   if (turns[i].key !== datum.key) {
+                     extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
+                   }
+                 }
 
-         map.canZoomOut = function () {
-           return map.zoom() > minZoom;
-         };
+                 _oldTurns = null;
+                 actions = _intersection.actions.concat(extraActions, [actionUnrestrictTurn(datum), _t('operations.restriction.annotation.delete')]);
+               } else {
+                 // Allowed -> NO
+                 actions = _intersection.actions.concat([actionRestrictTurn(datum, restrictionType), _t('operations.restriction.annotation.create')]);
+               }
 
-         map.center = function (loc2) {
-           if (!arguments.length) {
-             return projection.invert(pxCenter());
+               context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
+               // Refresh it and update the help..
+
+               var s = surface.selectAll('.' + datum.key);
+               datum = s.empty() ? null : s.datum();
+               updateHints(datum);
+             } else {
+               _fromWayID = null;
+               _oldTurns = null;
+               redraw();
+             }
            }
 
-           if (setCenterZoom(loc2, map.zoom())) {
-             dispatch$1.call('move', this, map);
+           function mouseover(d3_event) {
+             var datum = d3_event.target.__data__;
+             updateHints(datum);
            }
 
-           scheduleRedraw();
-           return map;
-         };
+           _lastXPos = _lastXPos || sdims[0];
 
-         map.unobscuredCenterZoomEase = function (loc, zoom) {
-           var offset = map.unobscuredOffsetPx();
-           var proj = geoRawMercator().transform(projection.transform()); // copy projection
-           // use the target zoom to calculate the offset center
+           function redraw(minChange) {
+             var xPos = -1;
 
-           proj.scale(geoZoomToScale(zoom, TILESIZE));
-           var locPx = proj(loc);
-           var offsetLocPx = [locPx[0] + offset[0], locPx[1] + offset[1]];
-           var offsetLoc = proj.invert(offsetLocPx);
-           map.centerZoomEase(offsetLoc, zoom);
-         };
+             if (minChange) {
+               xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
+             }
 
-         map.unobscuredOffsetPx = function () {
-           var openPane = context.container().select('.map-panes .map-pane.shown');
+             if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
+               if (context.hasEntity(_vertexID)) {
+                 _lastXPos = xPos;
 
-           if (!openPane.empty()) {
-             return [openPane.node().offsetWidth / 2, 0];
+                 _container.call(renderViewer);
+               }
+             }
            }
 
-           return [0, 0];
-         };
+           function highlightPathsFrom(wayID) {
+             surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
+             surface.selectAll('.' + wayID).classed('related', true);
 
-         map.zoom = function (z2) {
-           if (!arguments.length) {
-             return Math.max(geoScaleToZoom(projection.scale(), TILESIZE), 0);
-           }
+             if (wayID) {
+               var turns = _intersection.turns(wayID, _maxViaWay);
 
-           if (z2 < _minzoom) {
-             surface.interrupt();
-             dispatch$1.call('hitMinZoom', this, map);
-             z2 = context.minEditableZoom();
+               for (var i = 0; i < turns.length; i++) {
+                 var turn = turns[i];
+                 var ids = [turn.to.way];
+                 var klass = turn.no ? 'restrict' : turn.only ? 'only' : 'allow';
+
+                 if (turn.only || turns.length === 1) {
+                   if (turn.via.ways) {
+                     ids = ids.concat(turn.via.ways);
+                   }
+                 } else if (turn.to.way === wayID) {
+                   continue;
+                 }
+
+                 surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
+               }
+             }
            }
 
-           if (setCenterZoom(map.center(), z2)) {
-             dispatch$1.call('move', this, map);
-           }
+           function updateHints(datum) {
+             var help = _container.selectAll('.restriction-help').html('');
+
+             var placeholders = {};
+             ['from', 'via', 'to'].forEach(function (k) {
+               placeholders[k] = {
+                 html: '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>'
+               };
+             });
+             var entity = datum && datum.properties && datum.properties.entity;
+
+             if (entity) {
+               datum = entity;
+             }
+
+             if (_fromWayID) {
+               way = vgraph.entity(_fromWayID);
+               surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+             } // Hovering a way
+
+
+             if (datum instanceof osmWay && datum.__from) {
+               way = datum;
+               highlightPathsFrom(_fromWayID ? null : way.id);
+               surface.selectAll('.' + way.id).classed('related', true);
+               var clickSelect = !_fromWayID || _fromWayID !== way.id;
+               help.append('div') // "Click to select FROM {fromName}." / "FROM {fromName}"
+               .html(_t.html('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
+                 from: placeholders.from,
+                 fromName: displayName(way.id, vgraph)
+               })); // Hovering a turn arrow
+             } else if (datum instanceof osmTurn) {
+               var restrictionType = osmInferRestriction(vgraph, datum, projection);
+               var turnType = restrictionType.replace(/^(only|no)\_/, '');
+               var indirect = datum.direct === false ? _t.html('restriction.help.indirect') : '';
+               var klass, turnText, nextText;
+
+               if (datum.no) {
+                 klass = 'restrict';
+                 turnText = _t.html('restriction.help.turn.no_' + turnType, {
+                   indirect: indirect
+                 });
+                 nextText = _t.html('restriction.help.turn.only_' + turnType, {
+                   indirect: ''
+                 });
+               } else if (datum.only) {
+                 klass = 'only';
+                 turnText = _t.html('restriction.help.turn.only_' + turnType, {
+                   indirect: indirect
+                 });
+                 nextText = _t.html('restriction.help.turn.allowed_' + turnType, {
+                   indirect: ''
+                 });
+               } else {
+                 klass = 'allow';
+                 turnText = _t.html('restriction.help.turn.allowed_' + turnType, {
+                   indirect: indirect
+                 });
+                 nextText = _t.html('restriction.help.turn.no_' + turnType, {
+                   indirect: ''
+                 });
+               }
+
+               help.append('div') // "NO Right Turn (indirect)"
+               .attr('class', 'qualifier ' + klass).html(turnText);
+               help.append('div') // "FROM {fromName} TO {toName}"
+               .html(_t.html('restriction.help.from_name_to_name', {
+                 from: placeholders.from,
+                 fromName: displayName(datum.from.way, vgraph),
+                 to: placeholders.to,
+                 toName: displayName(datum.to.way, vgraph)
+               }));
 
-           scheduleRedraw();
-           return map;
-         };
+               if (datum.via.ways && datum.via.ways.length) {
+                 var names = [];
 
-         map.centerZoom = function (loc2, z2) {
-           if (setCenterZoom(loc2, z2)) {
-             dispatch$1.call('move', this, map);
-           }
+                 for (var i = 0; i < datum.via.ways.length; i++) {
+                   var prev = names[names.length - 1];
+                   var curr = displayName(datum.via.ways[i], vgraph);
 
-           scheduleRedraw();
-           return map;
-         };
+                   if (!prev || curr !== prev) {
+                     // collapse identical names
+                     names.push(curr);
+                   }
+                 }
 
-         map.zoomTo = function (entity) {
-           var extent = entity.extent(context.graph());
-           if (!isFinite(extent.area())) return map;
-           var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-           return map.centerZoom(extent.center(), z2);
-         };
+                 help.append('div') // "VIA {viaNames}"
+                 .html(_t.html('restriction.help.via_names', {
+                   via: placeholders.via,
+                   viaNames: names.join(', ')
+                 }));
+               }
 
-         map.centerEase = function (loc2, duration) {
-           duration = duration || 250;
-           setCenterZoom(loc2, map.zoom(), duration);
-           return map;
-         };
+               if (!indirect) {
+                 help.append('div') // Click for "No Right Turn"
+                 .html(_t.html('restriction.help.toggle', {
+                   turn: {
+                     html: nextText.trim()
+                   }
+                 }));
+               }
 
-         map.zoomEase = function (z2, duration) {
-           duration = duration || 250;
-           setCenterZoom(map.center(), z2, duration, false);
-           return map;
-         };
+               highlightPathsFrom(null);
+               var alongIDs = datum.path.slice();
+               surface.selectAll(utilEntitySelector(alongIDs)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only'); // Hovering empty surface
+             } else {
+               highlightPathsFrom(null);
 
-         map.centerZoomEase = function (loc2, z2, duration) {
-           duration = duration || 250;
-           setCenterZoom(loc2, z2, duration, false);
-           return map;
-         };
+               if (_fromWayID) {
+                 help.append('div') // "FROM {fromName}"
+                 .html(_t.html('restriction.help.from_name', {
+                   from: placeholders.from,
+                   fromName: displayName(_fromWayID, vgraph)
+                 }));
+               } else {
+                 help.append('div') // "Click to select a FROM segment."
+                 .html(_t.html('restriction.help.select_from', {
+                   from: placeholders.from
+                 }));
+               }
+             }
+           }
+         }
 
-         map.transformEase = function (t2, duration) {
-           duration = duration || 250;
-           setTransform(t2, duration, false
-           /* don't force */
-           );
-           return map;
-         };
+         function displayMaxDistance(maxDist) {
+           return function (selection) {
+             var isImperial = !_mainLocalizer.usesMetric();
+             var opts;
+
+             if (isImperial) {
+               var distToFeet = {
+                 // imprecise conversion for prettier display
+                 20: 70,
+                 25: 85,
+                 30: 100,
+                 35: 115,
+                 40: 130,
+                 45: 145,
+                 50: 160
+               }[maxDist];
+               opts = {
+                 distance: _t('units.feet', {
+                   quantity: distToFeet
+                 })
+               };
+             } else {
+               opts = {
+                 distance: _t('units.meters', {
+                   quantity: maxDist
+                 })
+               };
+             }
 
-         map.zoomToEase = function (obj, duration) {
-           var extent;
+             return selection.html('').call(_t.append('restriction.controls.distance_up_to', opts));
+           };
+         }
 
-           if (Array.isArray(obj)) {
-             obj.forEach(function (entity) {
-               var entityExtent = entity.extent(context.graph());
+         function displayMaxVia(maxVia) {
+           return function (selection) {
+             selection = selection.html('');
+             return maxVia === 0 ? selection.call(_t.append('restriction.controls.via_node_only')) : maxVia === 1 ? selection.call(_t.append('restriction.controls.via_up_to_one')) : selection.call(_t.append('restriction.controls.via_up_to_two'));
+           };
+         }
 
-               if (!extent) {
-                 extent = entityExtent;
-               } else {
-                 extent = extent.extend(entityExtent);
-               }
-             });
-           } else {
-             extent = obj.extent(context.graph());
-           }
+         function displayName(entityID, graph) {
+           var entity = graph.entity(entityID);
+           var name = utilDisplayName(entity) || '';
+           var matched = _mainPresetIndex.match(entity, graph);
+           var type = matched && matched.name() || utilDisplayType(entity.id);
+           return name || type;
+         }
 
-           if (!isFinite(extent.area())) return map;
-           var z2 = clamp(map.trimmedExtentZoom(extent), 0, 20);
-           return map.centerZoomEase(extent.center(), z2, duration);
+         restrictions.entityIDs = function (val) {
+           _intersection = null;
+           _fromWayID = null;
+           _oldTurns = null;
+           _vertexID = val[0];
          };
 
-         map.startEase = function () {
-           utilBindOnce(surface, _pointerPrefix + 'down.ease', function () {
-             map.cancelEase();
-           });
-           return map;
-         };
+         restrictions.tags = function () {};
 
-         map.cancelEase = function () {
-           _selection.interrupt();
+         restrictions.focus = function () {};
 
-           return map;
+         restrictions.off = function (selection) {
+           if (!_initialized) return;
+           selection.selectAll('.surface').call(breathe.off).on('click.restrictions', null).on('mouseover.restrictions', null);
+           select(window).on('resize.restrictions', null);
          };
 
-         map.extent = function (val) {
-           if (!arguments.length) {
-             return new geoExtent(projection.invert([0, _dimensions[1]]), projection.invert([_dimensions[0], 0]));
-           } else {
-             var extent = geoExtent(val);
-             map.centerZoom(extent.center(), map.extentZoom(extent));
-           }
-         };
+         return utilRebind(restrictions, dispatch, 'on');
+       }
+       uiFieldRestrictions.supportsMultiselection = false;
 
-         map.trimmedExtent = function (val) {
-           if (!arguments.length) {
-             var headerY = 71;
-             var footerY = 30;
-             var pad = 10;
-             return new geoExtent(projection.invert([pad, _dimensions[1] - footerY - pad]), projection.invert([_dimensions[0] - pad, headerY + pad]));
-           } else {
-             var extent = geoExtent(val);
-             map.centerZoom(extent.center(), map.trimmedExtentZoom(extent));
-           }
-         };
+       function uiFieldTextarea(field, context) {
+         var dispatch = dispatch$8('change');
+         var input = select(null);
 
-         function calcExtentZoom(extent, dim) {
-           var tl = projection([extent[0][0], extent[1][1]]);
-           var br = projection([extent[1][0], extent[0][1]]); // Calculate maximum zoom that fits extent
+         var _tags;
 
-           var hFactor = (br[0] - tl[0]) / dim[0];
-           var vFactor = (br[1] - tl[1]) / dim[1];
-           var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-           var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-           var newZoom = map.zoom() - Math.max(hZoomDiff, vZoomDiff);
-           return newZoom;
+         function textarea(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           input = wrap.selectAll('textarea').data([0]);
+           input = input.enter().append('textarea').attr('id', field.domId).call(utilNoAuto).on('input', change(true)).on('blur', change()).on('change', change()).merge(input);
          }
 
-         map.extentZoom = function (val) {
-           return calcExtentZoom(geoExtent(val), _dimensions);
-         };
-
-         map.trimmedExtentZoom = function (val) {
-           var trimY = 120;
-           var trimX = 40;
-           var trimmed = [_dimensions[0] - trimX, _dimensions[1] - trimY];
-           return calcExtentZoom(geoExtent(val), trimmed);
-         };
+         function change(onInput) {
+           return function () {
+             var val = utilGetSetValue(input);
+             if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
 
-         map.withinEditableZoom = function () {
-           return map.zoom() >= context.minEditableZoom();
-         };
+             if (!val && Array.isArray(_tags[field.key])) return;
+             var t = {};
+             t[field.key] = val || undefined;
+             dispatch.call('change', this, t, onInput);
+           };
+         }
 
-         map.isInWideSelection = function () {
-           return !map.withinEditableZoom() && context.selectedIDs().length;
+         textarea.tags = function (tags) {
+           _tags = tags;
+           var isMixed = Array.isArray(tags[field.key]);
+           utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
          };
 
-         map.editableDataEnabled = function (skipZoomCheck) {
-           var layer = context.layers().layer('osm');
-           if (!layer || !layer.enabled()) return false;
-           return skipZoomCheck || map.withinEditableZoom();
+         textarea.focus = function () {
+           input.node().focus();
          };
 
-         map.notesEditable = function () {
-           var layer = context.layers().layer('notes');
-           if (!layer || !layer.enabled()) return false;
-           return map.withinEditableZoom();
-         };
+         return utilRebind(textarea, dispatch, 'on');
+       }
 
-         map.minzoom = function (val) {
-           if (!arguments.length) return _minzoom;
-           _minzoom = val;
-           return map;
-         };
+       function uiFieldWikidata(field, context) {
+         var wikidata = services.wikidata;
+         var dispatch = dispatch$8('change');
 
-         map.toggleHighlightEdited = function () {
-           surface.classed('highlight-edited', !surface.classed('highlight-edited'));
-           map.pan([0, 0]); // trigger a redraw
+         var _selection = select(null);
 
-           dispatch$1.call('changeHighlighting', this);
-         };
+         var _searchInput = select(null);
 
-         map.areaFillOptions = ['wireframe', 'partial', 'full'];
+         var _qid = null;
+         var _wikidataEntity = null;
+         var _wikiURL = '';
+         var _entityIDs = [];
 
-         map.activeAreaFill = function (val) {
-           if (!arguments.length) return corePreferences('area-fill') || 'partial';
-           corePreferences('area-fill', val);
+         var _wikipediaKey = field.keys && field.keys.find(function (key) {
+           return key.includes('wikipedia');
+         }),
+             _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
 
-           if (val !== 'wireframe') {
-             corePreferences('area-fill-toggle', val);
-           }
+         var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);
 
-           updateAreaFill();
-           map.pan([0, 0]); // trigger a redraw
+         function wiki(selection) {
+           _selection = selection;
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
+           var list = wrap.selectAll('ul').data([0]);
+           list = list.enter().append('ul').attr('class', 'rows').merge(list);
+           var searchRow = list.selectAll('li.wikidata-search').data([0]);
+           var searchRowEnter = searchRow.enter().append('li').attr('class', 'wikidata-search');
+           searchRowEnter.append('input').attr('type', 'text').attr('id', field.domId).style('flex', '1').call(utilNoAuto).on('focus', function () {
+             var node = select(this).node();
+             node.setSelectionRange(0, node.value.length);
+           }).on('blur', function () {
+             setLabelForEntity();
+           }).call(combobox.fetcher(fetchWikidataItems));
+           combobox.on('accept', function (d) {
+             if (d) {
+               _qid = d.id;
+               change();
+             }
+           }).on('cancel', function () {
+             setLabelForEntity();
+           });
+           searchRowEnter.append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+             domain: 'wikidata.org'
+           })).call(svgIcon('#iD-icon-out-link')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             if (_wikiURL) window.open(_wikiURL, '_blank');
+           });
+           searchRow = searchRow.merge(searchRowEnter);
+           _searchInput = searchRow.select('input');
+           var wikidataProperties = ['description', 'identifier'];
+           var items = list.selectAll('li.labeled-input').data(wikidataProperties); // Enter
 
-           dispatch$1.call('changeAreaFill', this);
-           return map;
-         };
+           var enter = items.enter().append('li').attr('class', function (d) {
+             return 'labeled-input preset-wikidata-' + d;
+           });
+           enter.append('span').attr('class', 'label').html(function (d) {
+             return _t.html('wikidata.' + d);
+           });
+           enter.append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', 'true').attr('readonly', 'true');
+           enter.append('button').attr('class', 'form-field-button').attr('title', _t('icons.copy')).call(svgIcon('#iD-operation-copy')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             select(this.parentNode).select('input').node().select();
+             document.execCommand('copy');
+           });
+         }
 
-         map.toggleWireframe = function () {
-           var activeFill = map.activeAreaFill();
+         function fetchWikidataItems(q, callback) {
+           if (!q && _hintKey) {
+             // other tags may be good search terms
+             for (var i in _entityIDs) {
+               var entity = context.hasEntity(_entityIDs[i]);
 
-           if (activeFill === 'wireframe') {
-             activeFill = corePreferences('area-fill-toggle') || 'partial';
-           } else {
-             activeFill = 'wireframe';
+               if (entity.tags[_hintKey]) {
+                 q = entity.tags[_hintKey];
+                 break;
+               }
+             }
            }
 
-           map.activeAreaFill(activeFill);
-         };
+           wikidata.itemsForSearchQuery(q, function (err, data) {
+             if (err) return;
 
-         function updateAreaFill() {
-           var activeFill = map.activeAreaFill();
-           map.areaFillOptions.forEach(function (opt) {
-             surface.classed('fill-' + opt, Boolean(opt === activeFill));
+             for (var i in data) {
+               data[i].value = data[i].label + ' (' + data[i].id + ')';
+               data[i].title = data[i].description;
+             }
+
+             if (callback) callback(data);
            });
          }
 
-         map.layers = function () {
-           return drawLayers;
-         };
-
-         map.doubleUpHandler = function () {
-           return _doubleUpHandler;
-         };
+         function change() {
+           var syncTags = {};
+           syncTags[field.key] = _qid;
+           dispatch.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
 
-         return utilRebind(map, dispatch$1, 'on');
-       }
+           var initGraph = context.graph();
+           var initEntityIDs = _entityIDs;
+           wikidata.entityByQID(_qid, function (err, entity) {
+             if (err) return; // If graph has changed, we can't apply this update.
 
-       function rendererPhotos(context) {
-         var dispatch$1 = dispatch('change');
-         var _layerIDs = ['streetside', 'mapillary', 'mapillary-map-features', 'mapillary-signs', 'openstreetcam'];
-         var _allPhotoTypes = ['flat', 'panoramic'];
+             if (context.graph() !== initGraph) return;
+             if (!entity.sitelinks) return;
+             var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
 
-         var _shownPhotoTypes = _allPhotoTypes.slice(); // shallow copy
+             ['labels', 'descriptions'].forEach(function (key) {
+               if (!entity[key]) return;
+               var valueLangs = Object.keys(entity[key]);
+               if (valueLangs.length === 0) return;
+               var valueLang = valueLangs[0];
 
+               if (langs.indexOf(valueLang) === -1) {
+                 langs.push(valueLang);
+               }
+             });
+             var newWikipediaValue;
 
-         var _dateFilters = ['fromDate', 'toDate'];
+             if (_wikipediaKey) {
+               var foundPreferred;
 
-         var _fromDate;
+               for (var i in langs) {
+                 var lang = langs[i];
+                 var siteID = lang.replace('-', '_') + 'wiki';
 
-         var _toDate;
+                 if (entity.sitelinks[siteID]) {
+                   foundPreferred = true;
+                   newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
 
-         var _usernames;
+                   break;
+                 }
+               }
 
-         function photos() {}
+               if (!foundPreferred) {
+                 // No wikipedia sites available in the user's language or the fallback languages,
+                 // default to any wikipedia sitelink
+                 var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function (site) {
+                   return site.endsWith('wiki');
+                 });
 
-         function updateStorage() {
-           if (window.mocha) return;
-           var hash = utilStringQs(window.location.hash);
-           var enabled = context.layers().all().filter(function (d) {
-             return _layerIDs.indexOf(d.id) !== -1 && d.layer && d.layer.supported() && d.layer.enabled();
-           }).map(function (d) {
-             return d.id;
-           });
+                 if (wikiSiteKeys.length === 0) {
+                   // if no wikipedia pages are linked to this wikidata entity, delete that tag
+                   newWikipediaValue = null;
+                 } else {
+                   var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
+                   var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
+                   newWikipediaValue = wikiLang + ':' + wikiTitle;
+                 }
+               }
+             }
 
-           if (enabled.length) {
-             hash.photo_overlay = enabled.join(',');
-           } else {
-             delete hash.photo_overlay;
-           }
+             if (newWikipediaValue) {
+               newWikipediaValue = context.cleanTagValue(newWikipediaValue);
+             }
 
-           window.location.replace('#' + utilQsString(hash, true));
-         }
+             if (typeof newWikipediaValue === 'undefined') return;
+             var actions = initEntityIDs.map(function (entityID) {
+               var entity = context.hasEntity(entityID);
+               if (!entity) return null;
+               var currTags = Object.assign({}, entity.tags); // shallow copy
 
-         photos.overlayLayerIDs = function () {
-           return _layerIDs;
-         };
+               if (newWikipediaValue === null) {
+                 if (!currTags[_wikipediaKey]) return null;
+                 delete currTags[_wikipediaKey];
+               } else {
+                 currTags[_wikipediaKey] = newWikipediaValue;
+               }
 
-         photos.allPhotoTypes = function () {
-           return _allPhotoTypes;
-         };
+               return actionChangeTags(entityID, currTags);
+             }).filter(Boolean);
+             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
 
-         photos.dateFilters = function () {
-           return _dateFilters;
-         };
+             context.overwrite(function actionUpdateWikipediaTags(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return graph;
+             }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+             // changeTags() is not intended to be called asynchronously
+           });
+         }
 
-         photos.dateFilterValue = function (val) {
-           return val === _dateFilters[0] ? _fromDate : _toDate;
-         };
+         function setLabelForEntity() {
+           var label = '';
 
-         photos.setDateFilter = function (type, val, updateUrl) {
-           // validate the date
-           var date = val && new Date(val);
+           if (_wikidataEntity) {
+             label = entityPropertyForDisplay(_wikidataEntity, 'labels');
 
-           if (date && !isNaN(date)) {
-             val = date.toISOString().substr(0, 10);
-           } else {
-             val = null;
+             if (label.length === 0) {
+               label = _wikidataEntity.id.toString();
+             }
            }
 
-           if (type === _dateFilters[0]) {
-             _fromDate = val;
+           utilGetSetValue(_searchInput, label);
+         }
 
-             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
-               _toDate = _fromDate;
-             }
-           }
+         wiki.tags = function (tags) {
+           var isMixed = Array.isArray(tags[field.key]);
 
-           if (type === _dateFilters[1]) {
-             _toDate = val;
+           _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
 
-             if (_fromDate && _toDate && new Date(_toDate) < new Date(_fromDate)) {
-               _fromDate = _toDate;
-             }
-           }
+           _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
 
-           dispatch$1.call('change', this);
+           if (!/^Q[0-9]*$/.test(_qid)) {
+             // not a proper QID
+             unrecognized();
+             return;
+           } // QID value in correct format
 
-           if (updateUrl) {
-             var rangeString;
 
-             if (_fromDate || _toDate) {
-               rangeString = (_fromDate || '') + '_' + (_toDate || '');
+           _wikiURL = 'https://wikidata.org/wiki/' + _qid;
+           wikidata.entityByQID(_qid, function (err, entity) {
+             if (err) {
+               unrecognized();
+               return;
              }
 
-             setUrlFilterValue('photo_dates', rangeString);
-           }
-         };
+             _wikidataEntity = entity;
+             setLabelForEntity();
+             var description = entityPropertyForDisplay(entity, 'descriptions');
+
+             _selection.select('button.wiki-link').classed('disabled', false);
+
+             _selection.select('.preset-wikidata-description').style('display', function () {
+               return description.length > 0 ? 'flex' : 'none';
+             }).select('input').attr('value', description);
 
-         photos.setUsernameFilter = function (val, updateUrl) {
-           if (val && typeof val === 'string') val = val.replace(/;/g, ',').split(',');
+             _selection.select('.preset-wikidata-identifier').style('display', function () {
+               return entity.id ? 'flex' : 'none';
+             }).select('input').attr('value', entity.id);
+           }); // not a proper QID
 
-           if (val) {
-             val = val.map(function (d) {
-               return d.trim();
-             }).filter(Boolean);
+           function unrecognized() {
+             _wikidataEntity = null;
+             setLabelForEntity();
 
-             if (!val.length) {
-               val = null;
-             }
-           }
+             _selection.select('.preset-wikidata-description').style('display', 'none');
 
-           _usernames = val;
-           dispatch$1.call('change', this);
+             _selection.select('.preset-wikidata-identifier').style('display', 'none');
 
-           if (updateUrl) {
-             var hashString;
+             _selection.select('button.wiki-link').classed('disabled', true);
 
-             if (_usernames) {
-               hashString = _usernames.join(',');
+             if (_qid && _qid !== '') {
+               _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
+             } else {
+               _wikiURL = '';
              }
-
-             setUrlFilterValue('photo_username', hashString);
            }
          };
 
-         function setUrlFilterValue(property, val) {
-           if (!window.mocha) {
-             var hash = utilStringQs(window.location.hash);
+         function entityPropertyForDisplay(wikidataEntity, propKey) {
+           if (!wikidataEntity[propKey]) return '';
+           var propObj = wikidataEntity[propKey];
+           var langKeys = Object.keys(propObj);
+           if (langKeys.length === 0) return ''; // sorted by priority, since we want to show the user's language first if possible
 
-             if (val) {
-               if (hash[property] === val) return;
-               hash[property] = val;
-             } else {
-               if (!(property in hash)) return;
-               delete hash[property];
-             }
+           var langs = wikidata.languagesToQuery();
 
-             window.location.replace('#' + utilQsString(hash, true));
-           }
-         }
+           for (var i in langs) {
+             var lang = langs[i];
+             var valueObj = propObj[lang];
+             if (valueObj && valueObj.value && valueObj.value.length > 0) return valueObj.value;
+           } // default to any available value
 
-         function showsLayer(id) {
-           var layer = context.layers().layer(id);
-           return layer && layer.supported() && layer.enabled();
+
+           return propObj[langKeys[0]].value;
          }
 
-         photos.shouldFilterByDate = function () {
-           return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
+         wiki.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return wiki;
          };
 
-         photos.shouldFilterByPhotoType = function () {
-           return showsLayer('mapillary') || showsLayer('streetside') && showsLayer('openstreetcam');
+         wiki.focus = function () {
+           _searchInput.node().focus();
          };
 
-         photos.shouldFilterByUsername = function () {
-           return showsLayer('mapillary') || showsLayer('openstreetcam') || showsLayer('streetside');
-         };
+         return utilRebind(wiki, dispatch, 'on');
+       }
 
-         photos.showsPhotoType = function (val) {
-           if (!photos.shouldFilterByPhotoType()) return true;
-           return _shownPhotoTypes.indexOf(val) !== -1;
-         };
+       function uiFieldWikipedia(field, context) {
+         var _arguments = arguments;
+         var dispatch = dispatch$8('change');
+         var wikipedia = services.wikipedia;
+         var wikidata = services.wikidata;
 
-         photos.showsFlat = function () {
-           return photos.showsPhotoType('flat');
-         };
+         var _langInput = select(null);
 
-         photos.showsPanoramic = function () {
-           return photos.showsPhotoType('panoramic');
-         };
+         var _titleInput = select(null);
 
-         photos.fromDate = function () {
-           return _fromDate;
-         };
+         var _wikiURL = '';
 
-         photos.toDate = function () {
-           return _toDate;
-         };
+         var _entityIDs;
 
-         photos.togglePhotoType = function (val) {
-           var index = _shownPhotoTypes.indexOf(val);
+         var _tags;
 
-           if (index !== -1) {
-             _shownPhotoTypes.splice(index, 1);
-           } else {
-             _shownPhotoTypes.push(val);
-           }
+         var _dataWikipedia = [];
+         _mainFileFetcher.get('wmf_sitematrix').then(function (d) {
+           _dataWikipedia = d;
+           if (_tags) updateForTags(_tags);
+         })["catch"](function () {
+           /* ignore */
+         });
+         var langCombo = uiCombobox(context, 'wikipedia-lang').fetcher(function (value, callback) {
+           var v = value.toLowerCase();
+           callback(_dataWikipedia.filter(function (d) {
+             return d[0].toLowerCase().indexOf(v) >= 0 || d[1].toLowerCase().indexOf(v) >= 0 || d[2].toLowerCase().indexOf(v) >= 0;
+           }).map(function (d) {
+             return {
+               value: d[1]
+             };
+           }));
+         });
+         var titleCombo = uiCombobox(context, 'wikipedia-title').fetcher(function (value, callback) {
+           if (!value) {
+             value = '';
 
-           dispatch$1.call('change', this);
-           return photos;
-         };
+             for (var i in _entityIDs) {
+               var entity = context.hasEntity(_entityIDs[i]);
 
-         photos.usernames = function () {
-           return _usernames;
-         };
+               if (entity.tags.name) {
+                 value = entity.tags.name;
+                 break;
+               }
+             }
+           }
 
-         photos.init = function () {
-           var hash = utilStringQs(window.location.hash);
+           var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
+           searchfn(language()[2], value, function (query, data) {
+             callback(data.map(function (d) {
+               return {
+                 value: d
+               };
+             }));
+           });
+         });
 
-           if (hash.photo_dates) {
-             // expect format like `photo_dates=2019-01-01_2020-12-31`, but allow a couple different separators
-             var parts = /^(.*)[–_](.*)$/g.exec(hash.photo_dates.trim());
-             this.setDateFilter('fromDate', parts && parts.length >= 2 && parts[1], false);
-             this.setDateFilter('toDate', parts && parts.length >= 3 && parts[2], false);
-           }
+         function wiki(selection) {
+           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
+           wrap = wrap.enter().append('div').attr('class', "form-field-input-wrap form-field-input-".concat(field.type)).merge(wrap);
+           var langContainer = wrap.selectAll('.wiki-lang-container').data([0]);
+           langContainer = langContainer.enter().append('div').attr('class', 'wiki-lang-container').merge(langContainer);
+           _langInput = langContainer.selectAll('input.wiki-lang').data([0]);
+           _langInput = _langInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-lang').attr('placeholder', _t('translate.localized_translation_language')).call(utilNoAuto).call(langCombo).merge(_langInput);
 
-           if (hash.photo_username) {
-             this.setUsernameFilter(hash.photo_username, false);
-           }
+           _langInput.on('blur', changeLang).on('change', changeLang);
 
-           if (hash.photo_overlay) {
-             // support enabling photo layers by default via a URL parameter, e.g. `photo_overlay=openstreetcam;mapillary;streetside`
-             var hashOverlayIDs = hash.photo_overlay.replace(/;/g, ',').split(',');
-             hashOverlayIDs.forEach(function (id) {
-               var layer = _layerIDs.indexOf(id) !== -1 && context.layers().layer(id);
-               if (layer && !layer.enabled()) layer.enabled(true);
-             });
-           }
+           var titleContainer = wrap.selectAll('.wiki-title-container').data([0]);
+           titleContainer = titleContainer.enter().append('div').attr('class', 'wiki-title-container').merge(titleContainer);
+           _titleInput = titleContainer.selectAll('input.wiki-title').data([0]);
+           _titleInput = _titleInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-title').attr('id', field.domId).call(utilNoAuto).call(titleCombo).merge(_titleInput);
 
-           if (hash.photo) {
-             // support opening a photo via a URL parameter, e.g. `photo=mapillary-fztgSDtLpa08ohPZFZjeRQ`
-             var photoIds = hash.photo.replace(/;/g, ',').split(',');
-             var photoId = photoIds.length && photoIds[0].trim();
-             var results = /(.*)\/(.*)/g.exec(photoId);
+           _titleInput.on('blur', function () {
+             change(true);
+           }).on('change', function () {
+             change(false);
+           });
 
-             if (results && results.length >= 3) {
-               var serviceId = results[1];
-               var photoKey = results[2];
-               var service = services[serviceId];
+           var link = titleContainer.selectAll('.wiki-link').data([0]);
+           link = link.enter().append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
+             domain: 'wikipedia.org'
+           })).call(svgIcon('#iD-icon-out-link')).merge(link);
+           link.on('click', function (d3_event) {
+             d3_event.preventDefault();
+             if (_wikiURL) window.open(_wikiURL, '_blank');
+           });
+         }
 
-               if (service && service.ensureViewerLoaded) {
-                 // if we're showing a photo then make sure its layer is enabled too
-                 var layer = _layerIDs.indexOf(serviceId) !== -1 && context.layers().layer(serviceId);
-                 if (layer && !layer.enabled()) layer.enabled(true);
-                 var baselineTime = Date.now();
-                 service.on('loadedImages.rendererPhotos', function () {
-                   // don't open the viewer if too much time has elapsed
-                   if (Date.now() - baselineTime > 45000) {
-                     service.on('loadedImages.rendererPhotos', null);
-                     return;
-                   }
+         function defaultLanguageInfo(skipEnglishFallback) {
+           var langCode = _mainLocalizer.languageCode().toLowerCase();
 
-                   if (!service.cachedImage(photoKey)) return;
-                   service.on('loadedImages.rendererPhotos', null);
-                   service.ensureViewerLoaded(context).then(function () {
-                     service.selectImage(context, photoKey).showViewer(context);
-                   });
-                 });
-               }
-             }
-           }
+           for (var i in _dataWikipedia) {
+             var d = _dataWikipedia[i]; // default to the language of iD's current locale
 
-           context.layers().on('change.rendererPhotos', updateStorage);
-         };
+             if (d[2] === langCode) return d;
+           } // fallback to English
 
-         return utilRebind(photos, dispatch$1, 'on');
-       }
 
-       function uiAccount(context) {
-         var osm = context.connection();
+           return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
+         }
 
-         function update(selection) {
-           if (!osm) return;
+         function language(skipEnglishFallback) {
+           var value = utilGetSetValue(_langInput).toLowerCase();
 
-           if (!osm.authenticated()) {
-             selection.selectAll('.userLink, .logoutLink').classed('hide', true);
-             return;
-           }
+           for (var i in _dataWikipedia) {
+             var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
 
-           osm.userDetails(function (err, details) {
-             var userLink = selection.select('.userLink'),
-                 logoutLink = selection.select('.logoutLink');
-             userLink.html('');
-             logoutLink.html('');
-             if (err || !details) return;
-             selection.selectAll('.userLink, .logoutLink').classed('hide', false); // Link
+             if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
+           } // fallback to English
 
-             var userLinkA = userLink.append('a').attr('href', osm.userURL(details.display_name)).attr('target', '_blank'); // Add thumbnail or dont
 
-             if (details.image_url) {
-               userLinkA.append('img').attr('class', 'icon pre-text user-icon').attr('src', details.image_url);
-             } else {
-               userLinkA.call(svgIcon('#iD-icon-avatar', 'pre-text light'));
-             } // Add user name
+           return defaultLanguageInfo(skipEnglishFallback);
+         }
 
+         function changeLang() {
+           utilGetSetValue(_langInput, language()[1]);
+           change(true);
+         }
 
-             userLinkA.append('span').attr('class', 'label').html(details.display_name);
-             logoutLink.append('a').attr('class', 'logout').attr('href', '#').html(_t.html('logout')).on('click.logout', function (d3_event) {
-               d3_event.preventDefault();
-               osm.logout();
-             });
+         function change(skipWikidata) {
+           var value = utilGetSetValue(_titleInput);
+           var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
+
+           var langInfo = m && _dataWikipedia.find(function (d) {
+             return m[1] === d[2];
            });
-         }
 
-         return function (selection) {
-           selection.append('li').attr('class', 'userLink').classed('hide', true);
-           selection.append('li').attr('class', 'logoutLink').classed('hide', true);
+           var syncTags = {};
 
-           if (osm) {
-             osm.on('change.account', function () {
-               update(selection);
-             });
-             update(selection);
-           }
-         };
-       }
+           if (langInfo) {
+             var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
 
-       function uiAttribution(context) {
-         var _selection = select(null);
+             value = decodeURIComponent(m[2]).replace(/_/g, ' ');
 
-         function render(selection, data, klass) {
-           var div = selection.selectAll(".".concat(klass)).data([0]);
-           div = div.enter().append('div').attr('class', klass).merge(div);
-           var attributions = div.selectAll('.attribution').data(data, function (d) {
-             return d.id;
-           });
-           attributions.exit().remove();
-           attributions = attributions.enter().append('span').attr('class', 'attribution').each(function (d, i, nodes) {
-             var attribution = select(nodes[i]);
+             if (m[3]) {
+               var anchor; // try {
+               // leave this out for now - #6232
+               // Best-effort `anchordecode:` implementation
+               // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
+               // } catch (e) {
 
-             if (d.terms_html) {
-               attribution.html(d.terms_html);
-               return;
-             }
+               anchor = decodeURIComponent(m[3]); // }
 
-             if (d.terms_url) {
-               attribution = attribution.append('a').attr('href', d.terms_url).attr('target', '_blank');
+               value += '#' + anchor.replace(/_/g, ' ');
              }
 
-             var sourceID = d.id.replace(/\./g, '<TX_DOT>');
-             var terms_text = _t("imagery.".concat(sourceID, ".attribution.text"), {
-               "default": d.terms_text || d.id || d.name()
+             value = value.slice(0, 1).toUpperCase() + value.slice(1);
+             utilGetSetValue(_langInput, nativeLangName);
+             utilGetSetValue(_titleInput, value);
+           }
+
+           if (value) {
+             syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
+           } else {
+             syncTags.wikipedia = undefined;
+           }
+
+           dispatch.call('change', this, syncTags);
+           if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
+
+           var initGraph = context.graph();
+           var initEntityIDs = _entityIDs;
+           wikidata.itemsByTitle(language()[2], value, function (err, data) {
+             if (err || !data || !Object.keys(data).length) return; // If graph has changed, we can't apply this update.
+
+             if (context.graph() !== initGraph) return;
+             var qids = Object.keys(data);
+             var value = qids && qids.find(function (id) {
+               return id.match(/^Q\d+$/);
              });
+             var actions = initEntityIDs.map(function (entityID) {
+               var entity = context.entity(entityID).tags;
+               var currTags = Object.assign({}, entity); // shallow copy
 
-             if (d.icon && !d.overlay) {
-               attribution.append('img').attr('class', 'source-image').attr('src', d.icon);
-             }
+               if (currTags.wikidata !== value) {
+                 currTags.wikidata = value;
+                 return actionChangeTags(entityID, currTags);
+               }
 
-             attribution.append('span').attr('class', 'attribution-text').html(terms_text);
-           }).merge(attributions);
-           var copyright = attributions.selectAll('.copyright-notice').data(function (d) {
-             var notice = d.copyrightNotices(context.map().zoom(), context.map().extent());
-             return notice ? [notice] : [];
+               return null;
+             }).filter(Boolean);
+             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+
+             context.overwrite(function actionUpdateWikidataTags(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return graph;
+             }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
+             // changeTags() is not intended to be called asynchronously
            });
-           copyright.exit().remove();
-           copyright = copyright.enter().append('span').attr('class', 'copyright-notice').merge(copyright);
-           copyright.html(String);
          }
 
-         function update() {
-           var baselayer = context.background().baseLayerSource();
+         wiki.tags = function (tags) {
+           _tags = tags;
+           updateForTags(tags);
+         };
 
-           _selection.call(render, baselayer ? [baselayer] : [], 'base-layer-attribution');
+         function updateForTags(tags) {
+           var value = typeof tags[field.key] === 'string' ? tags[field.key] : ''; // Expect tag format of `tagLang:tagArticleTitle`, e.g. `fr:Paris`, with
+           // optional suffix of `#anchor`
 
-           var z = context.map().zoom();
-           var overlays = context.background().overlayLayerSources() || [];
+           var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
+           var tagLang = m && m[1];
+           var tagArticleTitle = m && m[2];
+           var anchor = m && m[3];
 
-           _selection.call(render, overlays.filter(function (s) {
-             return s.validZoom(z);
-           }), 'overlay-layer-attribution');
-         }
+           var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
+             return tagLang === d[2];
+           }); // value in correct format
 
-         return function (selection) {
-           _selection = selection;
-           context.background().on('change.attribution', update);
-           context.map().on('move.attribution', throttle(update, 400, {
-             leading: false
-           }));
-           update();
-         };
-       }
 
-       function uiContributors(context) {
-         var osm = context.connection(),
-             debouncedUpdate = debounce(function () {
-           update();
-         }, 1000),
-             limit = 4,
-             hidden = false,
-             wrap = select(null);
+           if (tagLangInfo) {
+             var nativeLangName = tagLangInfo[1];
+             utilGetSetValue(_langInput, nativeLangName);
+             utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
 
-         function update() {
-           if (!osm) return;
-           var users = {},
-               entities = context.history().intersects(context.map().extent());
-           entities.forEach(function (entity) {
-             if (entity && entity.user) users[entity.user] = true;
-           });
-           var u = Object.keys(users),
-               subset = u.slice(0, u.length > limit ? limit - 1 : limit);
-           wrap.html('').call(svgIcon('#iD-icon-nearby', 'pre-text light'));
-           var userList = select(document.createElement('span'));
-           userList.selectAll().data(subset).enter().append('a').attr('class', 'user-link').attr('href', function (d) {
-             return osm.userURL(d);
-           }).attr('target', '_blank').html(String);
+             if (anchor) {
+               try {
+                 // Best-effort `anchorencode:` implementation
+                 anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
+               } catch (e) {
+                 anchor = anchor.replace(/ /g, '_');
+               }
+             }
 
-           if (u.length > limit) {
-             var count = select(document.createElement('span'));
-             var othersNum = u.length - limit + 1;
-             count.append('a').attr('target', '_blank').attr('href', function () {
-               return osm.changesetsURL(context.map().center(), context.map().zoom());
-             }).html(othersNum);
-             wrap.append('span').html(_t.html('contributors.truncated_list', {
-               n: othersNum,
-               users: userList.html(),
-               count: count.html()
-             }));
+             _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
            } else {
-             wrap.append('span').html(_t.html('contributors.list', {
-               users: userList.html()
-             }));
-           }
+             utilGetSetValue(_titleInput, value);
 
-           if (!u.length) {
-             hidden = true;
-             wrap.transition().style('opacity', 0);
-           } else if (hidden) {
-             wrap.transition().style('opacity', 1);
+             if (value && value !== '') {
+               utilGetSetValue(_langInput, '');
+               var defaultLangInfo = defaultLanguageInfo();
+               _wikiURL = "https://".concat(defaultLangInfo[2], ".wikipedia.org/w/index.php?fulltext=1&search=").concat(value);
+             } else {
+               var shownOrDefaultLangInfo = language(true
+               /* skipEnglishFallback */
+               );
+               utilGetSetValue(_langInput, shownOrDefaultLangInfo[1]);
+               _wikiURL = '';
+             }
            }
          }
 
-         return function (selection) {
-           if (!osm) return;
-           wrap = selection;
-           update();
-           osm.on('loaded.contributors', debouncedUpdate);
-           context.map().on('move.contributors', debouncedUpdate);
+         wiki.entityIDs = function (val) {
+           if (!_arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return wiki;
          };
-       }
 
-       var _popoverID = 0;
-       function uiPopover(klass) {
-         var _id = _popoverID++;
+         wiki.focus = function () {
+           _titleInput.node().focus();
+         };
 
-         var _anchorSelection = select(null);
+         return utilRebind(wiki, dispatch, 'on');
+       }
+       uiFieldWikipedia.supportsMultiselection = false;
 
-         var popover = function popover(selection) {
-           _anchorSelection = selection;
-           selection.each(setup);
-         };
+       var uiFields = {
+         access: uiFieldAccess,
+         address: uiFieldAddress,
+         check: uiFieldCheck,
+         combo: uiFieldCombo,
+         cycleway: uiFieldCycleway,
+         defaultCheck: uiFieldCheck,
+         email: uiFieldText,
+         identifier: uiFieldText,
+         lanes: uiFieldLanes,
+         localized: uiFieldLocalized,
+         roadheight: uiFieldRoadheight,
+         roadspeed: uiFieldRoadspeed,
+         manyCombo: uiFieldCombo,
+         multiCombo: uiFieldCombo,
+         networkCombo: uiFieldCombo,
+         number: uiFieldText,
+         onewayCheck: uiFieldCheck,
+         radio: uiFieldRadio,
+         restrictions: uiFieldRestrictions,
+         semiCombo: uiFieldCombo,
+         structureRadio: uiFieldRadio,
+         tel: uiFieldText,
+         text: uiFieldText,
+         textarea: uiFieldTextarea,
+         typeCombo: uiFieldCombo,
+         url: uiFieldText,
+         wikidata: uiFieldWikidata,
+         wikipedia: uiFieldWikipedia
+       };
 
-         var _animation = utilFunctor(false);
+       function uiField(context, presetField, entityIDs, options) {
+         options = Object.assign({
+           show: true,
+           wrap: true,
+           remove: true,
+           revert: true,
+           info: true
+         }, options);
+         var dispatch = dispatch$8('change', 'revert');
+         var field = Object.assign({}, presetField); // shallow copy
 
-         var _placement = utilFunctor('top'); // top, bottom, left, right
+         field.domId = utilUniqueDomId('form-field-' + field.safeid);
+         var _show = options.show;
+         var _state = '';
+         var _tags = {};
 
+         var _entityExtent;
 
-         var _alignment = utilFunctor('center'); // leading, center, trailing
+         if (entityIDs && entityIDs.length) {
+           _entityExtent = entityIDs.reduce(function (extent, entityID) {
+             var entity = context.graph().entity(entityID);
+             return extent.extend(entity.extent(context.graph()));
+           }, geoExtent());
+         }
 
+         var _locked = false;
 
-         var _scrollContainer = utilFunctor(select(null));
+         var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
+           label: field.label
+         })).placement('bottom');
 
-         var _content;
+         field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
 
-         var _displayType = utilFunctor('');
+         if (_show && !field.impl) {
+           createField();
+         } // Creates the field.. This is done lazily,
+         // once we know that the field will be shown.
 
-         var _hasArrow = utilFunctor(true); // use pointer events on supported platforms; fallback to mouse events
 
+         function createField() {
+           field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
+             dispatch.call('change', field, t, onInput);
+           });
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           if (entityIDs) {
+             field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
 
-         popover.displayType = function (val) {
-           if (arguments.length) {
-             _displayType = utilFunctor(val);
-             return popover;
-           } else {
-             return _displayType;
+             if (field.impl.entityIDs) {
+               field.impl.entityIDs(entityIDs);
+             }
            }
-         };
+         }
 
-         popover.hasArrow = function (val) {
-           if (arguments.length) {
-             _hasArrow = utilFunctor(val);
-             return popover;
-           } else {
-             return _hasArrow;
-           }
-         };
+         function isModified() {
+           if (!entityIDs || !entityIDs.length) return false;
+           return entityIDs.some(function (entityID) {
+             var original = context.graph().base().entities[entityID];
+             var latest = context.graph().entity(entityID);
+             return field.keys.some(function (key) {
+               return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
+             });
+           });
+         }
 
-         popover.placement = function (val) {
-           if (arguments.length) {
-             _placement = utilFunctor(val);
-             return popover;
-           } else {
-             return _placement;
-           }
-         };
+         function tagsContainFieldKey() {
+           return field.keys.some(function (key) {
+             if (field.type === 'multiCombo') {
+               for (var tagKey in _tags) {
+                 if (tagKey.indexOf(key) === 0) {
+                   return true;
+                 }
+               }
 
-         popover.alignment = function (val) {
-           if (arguments.length) {
-             _alignment = utilFunctor(val);
-             return popover;
-           } else {
-             return _alignment;
-           }
-         };
+               return false;
+             }
 
-         popover.scrollContainer = function (val) {
-           if (arguments.length) {
-             _scrollContainer = utilFunctor(val);
-             return popover;
-           } else {
-             return _scrollContainer;
-           }
-         };
+             return _tags[key] !== undefined;
+           });
+         }
 
-         popover.content = function (val) {
-           if (arguments.length) {
-             _content = val;
-             return popover;
-           } else {
-             return _content;
-           }
-         };
+         function revert(d3_event, d) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+           if (!entityIDs || _locked) return;
+           dispatch.call('revert', d, d.keys);
+         }
 
-         popover.isShown = function () {
-           var popoverSelection = _anchorSelection.select('.popover-' + _id);
+         function remove(d3_event, d) {
+           d3_event.stopPropagation();
+           d3_event.preventDefault();
+           if (_locked) return;
+           var t = {};
+           d.keys.forEach(function (key) {
+             t[key] = undefined;
+           });
+           dispatch.call('change', d, t);
+         }
 
-           return !popoverSelection.empty() && popoverSelection.classed('in');
-         };
+         field.render = function (selection) {
+           var container = selection.selectAll('.form-field').data([field]); // Enter
 
-         popover.show = function () {
-           _anchorSelection.each(show);
-         };
+           var enter = container.enter().append('div').attr('class', function (d) {
+             return 'form-field form-field-' + d.safeid;
+           }).classed('nowrap', !options.wrap);
 
-         popover.updateContent = function () {
-           _anchorSelection.each(updateContent);
-         };
+           if (options.wrap) {
+             var labelEnter = enter.append('label').attr('class', 'field-label').attr('for', function (d) {
+               return d.domId;
+             });
+             var textEnter = labelEnter.append('span').attr('class', 'label-text');
+             textEnter.append('span').attr('class', 'label-textvalue').html(function (d) {
+               return d.label();
+             });
+             textEnter.append('span').attr('class', 'label-textannotation');
 
-         popover.hide = function () {
-           _anchorSelection.each(hide);
-         };
+             if (options.remove) {
+               labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
+             }
 
-         popover.toggle = function () {
-           _anchorSelection.each(toggle);
-         };
+             if (options.revert) {
+               labelEnter.append('button').attr('class', 'modified-icon').attr('title', _t('icons.undo')).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo'));
+             }
+           } // Update
 
-         popover.destroy = function (selection, selector) {
-           // by default, just destroy the current popover
-           selector = selector || '.popover-' + _id;
-           selection.on(_pointerPrefix + 'enter.popover', null).on(_pointerPrefix + 'leave.popover', null).on(_pointerPrefix + 'up.popover', null).on(_pointerPrefix + 'down.popover', null).on('click.popover', null).attr('title', function () {
-             return this.getAttribute('data-original-title') || this.getAttribute('title');
-           }).attr('data-original-title', null).selectAll(selector).remove();
-         };
 
-         popover.destroyAny = function (selection) {
-           selection.call(popover.destroy, '.popover');
-         };
+           container = container.merge(enter);
+           container.select('.field-label > .remove-icon') // propagate bound data
+           .on('click', remove);
+           container.select('.field-label > .modified-icon') // propagate bound data
+           .on('click', revert);
+           container.each(function (d) {
+             var selection = select(this);
 
-         function setup() {
-           var anchor = select(this);
+             if (!d.impl) {
+               createField();
+             }
 
-           var animate = _animation.apply(this, arguments);
+             var reference, help; // instantiate field help
 
-           var popoverSelection = anchor.selectAll('.popover-' + _id).data([0]);
-           var enter = popoverSelection.enter().append('div').attr('class', 'popover popover-' + _id + ' ' + (klass ? klass : '')).classed('arrowed', _hasArrow.apply(this, arguments));
-           enter.append('div').attr('class', 'popover-arrow');
-           enter.append('div').attr('class', 'popover-inner');
-           popoverSelection = enter.merge(popoverSelection);
+             if (options.wrap && field.type === 'restrictions') {
+               help = uiFieldHelp(context, 'restrictions');
+             } // instantiate tag reference
 
-           if (animate) {
-             popoverSelection.classed('fade', true);
-           }
 
-           var display = _displayType.apply(this, arguments);
+             if (options.wrap && options.info) {
+               var referenceKey = d.key || '';
 
-           if (display === 'hover') {
-             var _lastNonMouseEnterTime;
+               if (d.type === 'multiCombo') {
+                 // lookup key without the trailing ':'
+                 referenceKey = referenceKey.replace(/:$/, '');
+               }
 
-             anchor.on(_pointerPrefix + 'enter.popover', function (d3_event) {
-               if (d3_event.pointerType) {
-                 if (d3_event.pointerType !== 'mouse') {
-                   _lastNonMouseEnterTime = d3_event.timeStamp; // only allow hover behavior for mouse input
+               reference = uiTagReference(d.reference || {
+                 key: referenceKey
+               });
 
-                   return;
-                 } else if (_lastNonMouseEnterTime && d3_event.timeStamp - _lastNonMouseEnterTime < 1500) {
-                   // HACK: iOS 13.4 sends an erroneous `mouse` type pointerenter
-                   // event for non-mouse interactions right after sending
-                   // the correct type pointerenter event. Workaround by discarding
-                   // any mouse event that occurs immediately after a non-mouse event.
-                   return;
-                 }
-               } // don't show if buttons are pressed, e.g. during click and drag of map
+               if (_state === 'hover') {
+                 reference.showing(false);
+               }
+             }
 
+             selection.call(d.impl); // add field help components
 
-               if (d3_event.buttons !== 0) return;
-               show.apply(this, arguments);
-             }).on(_pointerPrefix + 'leave.popover', function () {
-               hide.apply(this, arguments);
-             }) // show on focus too for better keyboard navigation support
-             .on('focus.popover', function () {
-               show.apply(this, arguments);
-             }).on('blur.popover', function () {
-               hide.apply(this, arguments);
-             });
-           } else if (display === 'clickFocus') {
-             anchor.on(_pointerPrefix + 'down.popover', function (d3_event) {
-               d3_event.preventDefault();
-               d3_event.stopPropagation();
-             }).on(_pointerPrefix + 'up.popover', function (d3_event) {
-               d3_event.preventDefault();
-               d3_event.stopPropagation();
-             }).on('click.popover', toggle);
-             popoverSelection // This attribute lets the popover take focus
-             .attr('tabindex', 0).on('blur.popover', function () {
-               anchor.each(function () {
-                 hide.apply(this, arguments);
-               });
-             });
-           }
-         }
+             if (help) {
+               selection.call(help.body).select('.field-label').call(help.button);
+             } // add tag reference components
 
-         function show() {
-           var anchor = select(this);
-           var popoverSelection = anchor.selectAll('.popover-' + _id);
 
-           if (popoverSelection.empty()) {
-             // popover was removed somehow, put it back
-             anchor.call(popover.destroy);
-             anchor.each(setup);
-             popoverSelection = anchor.selectAll('.popover-' + _id);
-           }
+             if (reference) {
+               selection.call(reference.body).select('.field-label').call(reference.button);
+             }
 
-           popoverSelection.classed('in', true);
+             d.impl.tags(_tags);
+           });
+           container.classed('locked', _locked).classed('modified', isModified()).classed('present', tagsContainFieldKey()); // show a tip and lock icon if the field is locked
 
-           var displayType = _displayType.apply(this, arguments);
+           var annotation = container.selectAll('.field-label .label-textannotation');
+           var icon = annotation.selectAll('.icon').data(_locked ? [0] : []);
+           icon.exit().remove();
+           icon.enter().append('svg').attr('class', 'icon').append('use').attr('xlink:href', '#fas-lock');
+           container.call(_locked ? _lockedTip : _lockedTip.destroy);
+         };
 
-           if (displayType === 'clickFocus') {
-             anchor.classed('active', true);
-             popoverSelection.node().focus();
-           }
+         field.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return field;
+         };
 
-           anchor.each(updateContent);
-         }
+         field.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
 
-         function updateContent() {
-           var anchor = select(this);
+           if (tagsContainFieldKey() && !_show) {
+             // always show a field if it has a value to display
+             _show = true;
 
-           if (_content) {
-             anchor.selectAll('.popover-' + _id + ' > .popover-inner').call(_content.apply(this, arguments));
+             if (!field.impl) {
+               createField();
+             }
            }
 
-           updatePosition.apply(this, arguments); // hack: update multiple times to fix instances where the absolute offset is
-           // set before the dynamic popover size is calculated by the browser
+           return field;
+         };
 
-           updatePosition.apply(this, arguments);
-           updatePosition.apply(this, arguments);
-         }
+         field.locked = function (val) {
+           if (!arguments.length) return _locked;
+           _locked = val;
+           return field;
+         };
 
-         function updatePosition() {
-           var anchor = select(this);
-           var popoverSelection = anchor.selectAll('.popover-' + _id);
+         field.show = function () {
+           _show = true;
 
-           var scrollContainer = _scrollContainer && _scrollContainer.apply(this, arguments);
+           if (!field.impl) {
+             createField();
+           }
 
-           var scrollNode = scrollContainer && !scrollContainer.empty() && scrollContainer.node();
-           var scrollLeft = scrollNode ? scrollNode.scrollLeft : 0;
-           var scrollTop = scrollNode ? scrollNode.scrollTop : 0;
+           if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
+             var t = {};
+             t[field.key] = field["default"];
+             dispatch.call('change', this, t);
+           }
+         }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
 
-           var placement = _placement.apply(this, arguments);
 
-           popoverSelection.classed('left', false).classed('right', false).classed('top', false).classed('bottom', false).classed(placement, true);
+         field.isShown = function () {
+           return _show;
+         }; // An allowed field can appear in the UI or in the 'Add field' dropdown.
+         // A non-allowed field is hidden from the user altogether
 
-           var alignment = _alignment.apply(this, arguments);
 
-           var alignFactor = 0.5;
+         field.isAllowed = function () {
+           if (entityIDs && entityIDs.length > 1 && uiFields[field.type].supportsMultiselection === false) return false;
+           if (field.geometry && !entityIDs.every(function (entityID) {
+             return field.matchGeometry(context.graph().geometry(entityID));
+           })) return false;
 
-           if (alignment === 'leading') {
-             alignFactor = 0;
-           } else if (alignment === 'trailing') {
-             alignFactor = 1;
+           if (entityIDs && _entityExtent && field.locationSetID) {
+             // is field allowed in this location?
+             var validLocations = _mainLocations.locationsAt(_entityExtent.center());
+             if (!validLocations[field.locationSetID]) return false;
            }
 
-           var anchorFrame = getFrame(anchor.node());
-           var popoverFrame = getFrame(popoverSelection.node());
-           var position;
+           var prerequisiteTag = field.prerequisiteTag;
 
-           switch (placement) {
-             case 'top':
-               position = {
-                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-                 y: anchorFrame.y - popoverFrame.h
-               };
-               break;
+           if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
+           prerequisiteTag) {
+             if (!entityIDs.every(function (entityID) {
+               var entity = context.graph().entity(entityID);
 
-             case 'bottom':
-               position = {
-                 x: anchorFrame.x + (anchorFrame.w - popoverFrame.w) * alignFactor,
-                 y: anchorFrame.y + anchorFrame.h
-               };
-               break;
+               if (prerequisiteTag.key) {
+                 var value = entity.tags[prerequisiteTag.key];
+                 if (!value) return false;
 
-             case 'left':
-               position = {
-                 x: anchorFrame.x - popoverFrame.w,
-                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-               };
-               break;
+                 if (prerequisiteTag.valueNot) {
+                   return prerequisiteTag.valueNot !== value;
+                 }
 
-             case 'right':
-               position = {
-                 x: anchorFrame.x + anchorFrame.w,
-                 y: anchorFrame.y + (anchorFrame.h - popoverFrame.h) * alignFactor
-               };
-               break;
+                 if (prerequisiteTag.value) {
+                   return prerequisiteTag.value === value;
+                 }
+               } else if (prerequisiteTag.keyNot) {
+                 if (entity.tags[prerequisiteTag.keyNot]) return false;
+               }
+
+               return true;
+             })) return false;
            }
 
-           if (position) {
-             if (scrollNode && (placement === 'top' || placement === 'bottom')) {
-               var initialPosX = position.x;
+           return true;
+         };
 
-               if (position.x + popoverFrame.w > scrollNode.offsetWidth - 10) {
-                 position.x = scrollNode.offsetWidth - 10 - popoverFrame.w;
-               } else if (position.x < 10) {
-                 position.x = 10;
-               }
+         field.focus = function () {
+           if (field.impl) {
+             field.impl.focus();
+           }
+         };
 
-               var arrow = anchor.selectAll('.popover-' + _id + ' > .popover-arrow'); // keep the arrow centered on the button, or as close as possible
+         return utilRebind(field, dispatch, 'on');
+       }
 
-               var arrowPosX = Math.min(Math.max(popoverFrame.w / 2 - (position.x - initialPosX), 10), popoverFrame.w - 10);
-               arrow.style('left', ~~arrowPosX + 'px');
-             }
+       function uiFormFields(context) {
+         var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
+         var _fieldsArr = [];
+         var _lastPlaceholder = '';
+         var _state = '';
+         var _klass = '';
 
-             popoverSelection.style('left', ~~position.x + 'px').style('top', ~~position.y + 'px');
-           } else {
-             popoverSelection.style('left', null).style('top', null);
-           }
+         function formFields(selection) {
+           var allowedFields = _fieldsArr.filter(function (field) {
+             return field.isAllowed();
+           });
 
-           function getFrame(node) {
-             var positionStyle = select(node).style('position');
+           var shown = allowedFields.filter(function (field) {
+             return field.isShown();
+           });
+           var notShown = allowedFields.filter(function (field) {
+             return !field.isShown();
+           });
+           var container = selection.selectAll('.form-fields-container').data([0]);
+           container = container.enter().append('div').attr('class', 'form-fields-container ' + (_klass || '')).merge(container);
+           var fields = container.selectAll('.wrap-form-field').data(shown, function (d) {
+             return d.id + (d.entityIDs ? d.entityIDs.join() : '');
+           });
+           fields.exit().remove(); // Enter
 
-             if (positionStyle === 'absolute' || positionStyle === 'static') {
-               return {
-                 x: node.offsetLeft - scrollLeft,
-                 y: node.offsetTop - scrollTop,
-                 w: node.offsetWidth,
-                 h: node.offsetHeight
-               };
-             } else {
-               return {
-                 x: 0,
-                 y: 0,
-                 w: node.offsetWidth,
-                 h: node.offsetHeight
-               };
-             }
-           }
-         }
+           var enter = fields.enter().append('div').attr('class', function (d) {
+             return 'wrap-form-field wrap-form-field-' + d.safeid;
+           }); // Update
 
-         function hide() {
-           var anchor = select(this);
+           fields = fields.merge(enter);
+           fields.order().each(function (d) {
+             select(this).call(d.render);
+           });
+           var titles = [];
+           var moreFields = notShown.map(function (field) {
+             var title = field.title();
+             titles.push(title);
+             var terms = field.terms();
+             if (field.key) terms.push(field.key);
+             if (field.keys) terms = terms.concat(field.keys);
+             return {
+               display: field.label(),
+               value: title,
+               title: title,
+               field: field,
+               terms: terms
+             };
+           });
+           var placeholder = titles.slice(0, 3).join(', ') + (titles.length > 3 ? '…' : '');
+           var more = selection.selectAll('.more-fields').data(_state === 'hover' || moreFields.length === 0 ? [] : [0]);
+           more.exit().remove();
+           var moreEnter = more.enter().append('div').attr('class', 'more-fields').append('label');
+           moreEnter.append('span').call(_t.append('inspector.add_fields'));
+           more = moreEnter.merge(more);
+           var input = more.selectAll('.value').data([0]);
+           input.exit().remove();
+           input = input.enter().append('input').attr('class', 'value').attr('type', 'text').attr('placeholder', placeholder).call(utilNoAuto).merge(input);
+           input.call(utilGetSetValue, '').call(moreCombo.data(moreFields).on('accept', function (d) {
+             if (!d) return; // user entered something that was not matched
 
-           if (_displayType.apply(this, arguments) === 'clickFocus') {
-             anchor.classed('active', false);
-           }
+             var field = d.field;
+             field.show();
+             selection.call(formFields); // rerender
 
-           anchor.selectAll('.popover-' + _id).classed('in', false);
-         }
+             field.focus();
+           })); // avoid updating placeholder excessively (triggers style recalc)
 
-         function toggle() {
-           if (select(this).select('.popover-' + _id).classed('in')) {
-             hide.apply(this, arguments);
-           } else {
-             show.apply(this, arguments);
+           if (_lastPlaceholder !== placeholder) {
+             input.attr('placeholder', placeholder);
+             _lastPlaceholder = placeholder;
            }
          }
 
-         return popover;
-       }
-
-       function uiTooltip(klass) {
-         var tooltip = uiPopover((klass || '') + ' tooltip').displayType('hover');
-
-         var _title = function _title() {
-           var title = this.getAttribute('data-original-title');
+         formFields.fieldsArr = function (val) {
+           if (!arguments.length) return _fieldsArr;
+           _fieldsArr = val || [];
+           return formFields;
+         };
 
-           if (title) {
-             return title;
-           } else {
-             title = this.getAttribute('title');
-             this.removeAttribute('title');
-             this.setAttribute('data-original-title', title);
-           }
+         formFields.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return formFields;
+         };
 
-           return title;
+         formFields.klass = function (val) {
+           if (!arguments.length) return _klass;
+           _klass = val;
+           return formFields;
          };
 
-         var _heading = utilFunctor(null);
+         return formFields;
+       }
 
-         var _keys = utilFunctor(null);
+       function uiChangesetEditor(context) {
+         var dispatch = dispatch$8('change');
+         var formFields = uiFormFields(context);
+         var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
 
-         tooltip.title = function (val) {
-           if (!arguments.length) return _title;
-           _title = utilFunctor(val);
-           return tooltip;
-         };
+         var _fieldsArr;
 
-         tooltip.heading = function (val) {
-           if (!arguments.length) return _heading;
-           _heading = utilFunctor(val);
-           return tooltip;
-         };
+         var _tags;
 
-         tooltip.keys = function (val) {
-           if (!arguments.length) return _keys;
-           _keys = utilFunctor(val);
-           return tooltip;
-         };
+         var _changesetID;
 
-         tooltip.content(function () {
-           var heading = _heading.apply(this, arguments);
+         function changesetEditor(selection) {
+           render(selection);
+         }
 
-           var text = _title.apply(this, arguments);
+         function render(selection) {
+           var initial = false;
 
-           var keys = _keys.apply(this, arguments);
+           if (!_fieldsArr) {
+             initial = true;
+             var presets = _mainPresetIndex;
+             _fieldsArr = [uiField(context, presets.field('comment'), null, {
+               show: true,
+               revert: false
+             }), uiField(context, presets.field('source'), null, {
+               show: false,
+               revert: false
+             }), uiField(context, presets.field('hashtags'), null, {
+               show: false,
+               revert: false
+             })];
 
-           return function (selection) {
-             var headingSelect = selection.selectAll('.tooltip-heading').data(heading ? [heading] : []);
-             headingSelect.exit().remove();
-             headingSelect.enter().append('div').attr('class', 'tooltip-heading').merge(headingSelect).html(heading);
-             var textSelect = selection.selectAll('.tooltip-text').data(text ? [text] : []);
-             textSelect.exit().remove();
-             textSelect.enter().append('div').attr('class', 'tooltip-text').merge(textSelect).html(text);
-             var keyhintWrap = selection.selectAll('.keyhint-wrap').data(keys && keys.length ? [0] : []);
-             keyhintWrap.exit().remove();
-             var keyhintWrapEnter = keyhintWrap.enter().append('div').attr('class', 'keyhint-wrap');
-             keyhintWrapEnter.append('span').html(_t.html('tooltip_keyhint'));
-             keyhintWrap = keyhintWrapEnter.merge(keyhintWrap);
-             keyhintWrap.selectAll('kbd.shortcut').data(keys && keys.length ? keys : []).enter().append('kbd').attr('class', 'shortcut').html(function (d) {
-               return d;
+             _fieldsArr.forEach(function (field) {
+               field.on('change', function (t, onInput) {
+                 dispatch.call('change', field, undefined, t, onInput);
+               });
              });
-           };
-         });
-         return tooltip;
-       }
-
-       function uiEditMenu(context) {
-         var dispatch$1 = dispatch('toggled');
+           }
 
-         var _menu = select(null);
+           _fieldsArr.forEach(function (field) {
+             field.tags(_tags);
+           });
 
-         var _operations = []; // the position the menu should be displayed relative to
+           selection.call(formFields.fieldsArr(_fieldsArr));
 
-         var _anchorLoc = [0, 0];
-         var _anchorLocLonLat = [0, 0]; // a string indicating how the menu was opened
+           if (initial) {
+             var commentField = selection.select('.form-field-comment textarea');
+             var commentNode = commentField.node();
 
-         var _triggerType = '';
-         var _vpTopMargin = 85; // viewport top margin
+             if (commentNode) {
+               commentNode.focus();
+               commentNode.select();
+             } // trigger a 'blur' event so that comment field can be cleaned
+             // and checked for hashtags, even if retrieved from localstorage
 
-         var _vpBottomMargin = 45; // viewport bottom margin
 
-         var _vpSideMargin = 35; // viewport side margin
+             utilTriggerEvent(commentField, 'blur');
+             var osm = context.connection();
 
-         var _menuTop = false;
+             if (osm) {
+               osm.userChangesets(function (err, changesets) {
+                 if (err) return;
+                 var comments = changesets.map(function (changeset) {
+                   var comment = changeset.tags.comment;
+                   return comment ? {
+                     title: comment,
+                     value: comment
+                   } : null;
+                 }).filter(Boolean);
+                 commentField.call(commentCombo.data(utilArrayUniqBy(comments, 'title')));
+               });
+             }
+           } // Add warning if comment mentions Google
 
-         var _menuHeight;
 
-         var _menuWidth; // hardcode these values to make menu positioning easier
+           var hasGoogle = _tags.comment.match(/google/i);
 
+           var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning').data(hasGoogle ? [0] : []);
+           commentWarning.exit().transition().duration(200).style('opacity', 0).remove();
+           var commentEnter = commentWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning comment-warning').style('opacity', 0);
+           commentEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-alert', 'inline')).attr('href', _t('commit.google_warning_link')).append('span').call(_t.append('commit.google_warning'));
+           commentEnter.transition().duration(200).style('opacity', 1);
+         }
 
-         var _verticalPadding = 4; // see also `.edit-menu .tooltip` CSS; include margin
+         changesetEditor.tags = function (_) {
+           if (!arguments.length) return _tags;
+           _tags = _; // Don't reset _fieldsArr here.
 
-         var _tooltipWidth = 210; // offset the menu slightly from the target location
+           return changesetEditor;
+         };
 
-         var _menuSideMargin = 10;
-         var _tooltips = [];
+         changesetEditor.changesetID = function (_) {
+           if (!arguments.length) return _changesetID;
+           if (_changesetID === _) return changesetEditor;
+           _changesetID = _;
+           _fieldsArr = null;
+           return changesetEditor;
+         };
 
-         var editMenu = function editMenu(selection) {
-           var isTouchMenu = _triggerType.includes('touch') || _triggerType.includes('pen');
+         return utilRebind(changesetEditor, dispatch, 'on');
+       }
 
-           var ops = _operations.filter(function (op) {
-             return !isTouchMenu || !op.mouseOnly;
-           });
+       var JXON = new function () {
+         var sValueProp = 'keyValue',
+             sAttributesProp = 'keyAttributes',
+             sAttrPref = '@',
 
-           if (!ops.length) return;
-           _tooltips = []; // Position the menu above the anchor for stylus and finger input
-           // since the mapper's hand likely obscures the screen below the anchor
+         /* you can customize these values */
+         aCache = [],
+             rIsNull = /^\s*$/,
+             rIsBool = /^(?:true|false)$/i;
 
-           _menuTop = isTouchMenu; // Show labels for touch input since there aren't hover tooltips
+         function parseText(sValue) {
+           if (rIsNull.test(sValue)) {
+             return null;
+           }
 
-           var showLabels = isTouchMenu;
-           var buttonHeight = showLabels ? 32 : 34;
+           if (rIsBool.test(sValue)) {
+             return sValue.toLowerCase() === 'true';
+           }
 
-           if (showLabels) {
-             // Get a general idea of the width based on the length of the label
-             _menuWidth = 52 + Math.min(120, 6 * Math.max.apply(Math, ops.map(function (op) {
-               return op.title.length;
-             })));
-           } else {
-             _menuWidth = 44;
+           if (isFinite(sValue)) {
+             return parseFloat(sValue);
            }
 
-           _menuHeight = _verticalPadding * 2 + ops.length * buttonHeight;
-           _menu = selection.append('div').attr('class', 'edit-menu').classed('touch-menu', isTouchMenu).style('padding', _verticalPadding + 'px 0');
+           if (isFinite(Date.parse(sValue))) {
+             return new Date(sValue);
+           }
 
-           var buttons = _menu.selectAll('.edit-menu-item').data(ops); // enter
+           return sValue;
+         }
 
+         function EmptyTree() {}
 
-           var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
-             return 'edit-menu-item edit-menu-item-' + d.id;
-           }).style('height', buttonHeight + 'px').on('click', click) // don't listen for `mouseup` because we only care about non-mouse pointer types
-           .on('pointerup', pointerup).on('pointerdown mousedown', function pointerdown(d3_event) {
-             // don't let button presses also act as map input - #1869
-             d3_event.stopPropagation();
-           }).on('mouseenter.highlight', function (d3_event, d) {
-             if (!d.relatedEntityIds || select(this).classed('disabled')) return;
-             utilHighlightEntities(d.relatedEntityIds(), true, context);
-           }).on('mouseleave.highlight', function (d3_event, d) {
-             if (!d.relatedEntityIds) return;
-             utilHighlightEntities(d.relatedEntityIds(), false, context);
-           });
-           buttonsEnter.each(function (d) {
-             var tooltip = uiTooltip().heading(d.title).title(d.tooltip()).keys([d.keys[0]]);
+         EmptyTree.prototype.toString = function () {
+           return 'null';
+         };
 
-             _tooltips.push(tooltip);
+         EmptyTree.prototype.valueOf = function () {
+           return null;
+         };
 
-             select(this).call(tooltip).append('div').attr('class', 'icon-wrap').call(svgIcon('#iD-operation-' + d.id, 'operation'));
-           });
+         function objectify(vValue) {
+           return vValue === null ? new EmptyTree() : vValue instanceof Object ? vValue : new vValue.constructor(vValue);
+         }
 
-           if (showLabels) {
-             buttonsEnter.append('span').attr('class', 'label').html(function (d) {
-               return d.title;
-             });
-           } // update
+         function createObjTree(oParentNode, nVerb, bFreeze, bNesteAttr) {
+           var nLevelStart = aCache.length,
+               bChildren = oParentNode.hasChildNodes(),
+               bAttributes = oParentNode.hasAttributes(),
+               bHighVerb = Boolean(nVerb & 2);
+           var sProp,
+               vContent,
+               nLength = 0,
+               sCollectedTxt = '',
+               vResult = bHighVerb ? {} :
+           /* put here the default value for empty nodes: */
+           true;
 
+           if (bChildren) {
+             for (var oNode, nItem = 0; nItem < oParentNode.childNodes.length; nItem++) {
+               oNode = oParentNode.childNodes.item(nItem);
 
-           buttonsEnter.merge(buttons).classed('disabled', function (d) {
-             return d.disabled();
-           });
-           updatePosition();
-           var initialScale = context.projection.scale();
-           context.map().on('move.edit-menu', function () {
-             if (initialScale !== context.projection.scale()) {
-               editMenu.close();
+               if (oNode.nodeType === 4) {
+                 /* nodeType is 'CDATASection' (4) */
+                 sCollectedTxt += oNode.nodeValue;
+               } else if (oNode.nodeType === 3) {
+                 /* nodeType is 'Text' (3) */
+                 sCollectedTxt += oNode.nodeValue.trim();
+               } else if (oNode.nodeType === 1 && !oNode.prefix) {
+                 /* nodeType is 'Element' (1) */
+                 aCache.push(oNode);
+               }
              }
-           }).on('drawn.edit-menu', function (info) {
-             if (info.full) updatePosition();
-           });
-           var lastPointerUpType; // `pointerup` is always called before `click`
-
-           function pointerup(d3_event) {
-             lastPointerUpType = d3_event.pointerType;
            }
 
-           function click(d3_event, operation) {
-             d3_event.stopPropagation();
+           var nLevelEnd = aCache.length,
+               vBuiltVal = parseText(sCollectedTxt);
 
-             if (operation.relatedEntityIds) {
-               utilHighlightEntities(operation.relatedEntityIds(), false, context);
-             }
+           if (!bHighVerb && (bChildren || bAttributes)) {
+             vResult = nVerb === 0 ? objectify(vBuiltVal) : {};
+           }
 
-             if (operation.disabled()) {
-               if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
-                 // there are no tooltips for touch interactions so flash feedback instead
-                 context.ui().flash.duration(4000).iconName('#iD-operation-' + operation.id).iconClass('operation disabled').label(operation.tooltip)();
+           for (var nElId = nLevelStart; nElId < nLevelEnd; nElId++) {
+             sProp = aCache[nElId].nodeName.toLowerCase();
+             vContent = createObjTree(aCache[nElId], nVerb, bFreeze, bNesteAttr);
+
+             if (vResult.hasOwnProperty(sProp)) {
+               if (vResult[sProp].constructor !== Array) {
+                 vResult[sProp] = [vResult[sProp]];
                }
+
+               vResult[sProp].push(vContent);
              } else {
-               if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
-                 context.ui().flash.duration(2000).iconName('#iD-operation-' + operation.id).iconClass('operation').label(operation.annotation() || operation.title)();
+               vResult[sProp] = vContent;
+               nLength++;
+             }
+           }
+
+           if (bAttributes) {
+             var nAttrLen = oParentNode.attributes.length,
+                 sAPrefix = bNesteAttr ? '' : sAttrPref,
+                 oAttrParent = bNesteAttr ? {} : vResult;
+
+             for (var oAttrib, nAttrib = 0; nAttrib < nAttrLen; nLength++, nAttrib++) {
+               oAttrib = oParentNode.attributes.item(nAttrib);
+               oAttrParent[sAPrefix + oAttrib.name.toLowerCase()] = parseText(oAttrib.value.trim());
+             }
+
+             if (bNesteAttr) {
+               if (bFreeze) {
+                 Object.freeze(oAttrParent);
                }
 
-               operation();
-               editMenu.close();
+               vResult[sAttributesProp] = oAttrParent;
+               nLength -= nAttrLen - 1;
              }
+           }
 
-             lastPointerUpType = null;
+           if (nVerb === 3 || (nVerb === 2 || nVerb === 1 && nLength > 0) && sCollectedTxt) {
+             vResult[sValueProp] = vBuiltVal;
+           } else if (!bHighVerb && nLength === 0 && sCollectedTxt) {
+             vResult = vBuiltVal;
            }
 
-           dispatch$1.call('toggled', this, true);
-         };
+           if (bFreeze && (bHighVerb || nLength > 0)) {
+             Object.freeze(vResult);
+           }
 
-         function updatePosition() {
-           if (!_menu || _menu.empty()) return;
-           var anchorLoc = context.projection(_anchorLocLonLat);
-           var viewport = context.surfaceRect();
+           aCache.length = nLevelStart;
+           return vResult;
+         }
 
-           if (anchorLoc[0] < 0 || anchorLoc[0] > viewport.width || anchorLoc[1] < 0 || anchorLoc[1] > viewport.height) {
-             // close the menu if it's gone offscreen
-             editMenu.close();
-             return;
+         function loadObjTree(oXMLDoc, oParentEl, oParentObj) {
+           var vValue, oChild;
+
+           if (oParentObj instanceof String || oParentObj instanceof Number || oParentObj instanceof Boolean) {
+             oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toString()));
+             /* verbosity level is 0 */
+           } else if (oParentObj.constructor === Date) {
+             oParentEl.appendChild(oXMLDoc.createTextNode(oParentObj.toGMTString()));
            }
 
-           var menuLeft = displayOnLeft(viewport);
-           var offset = [0, 0];
-           offset[0] = menuLeft ? -1 * (_menuSideMargin + _menuWidth) : _menuSideMargin;
+           for (var sName in oParentObj) {
+             vValue = oParentObj[sName];
 
-           if (_menuTop) {
-             if (anchorLoc[1] - _menuHeight < _vpTopMargin) {
-               // menu is near top viewport edge, shift downward
-               offset[1] = -anchorLoc[1] + _vpTopMargin;
-             } else {
-               offset[1] = -_menuHeight;
+             if (isFinite(sName) || vValue instanceof Function) {
+               continue;
              }
-           } else {
-             if (anchorLoc[1] + _menuHeight > viewport.height - _vpBottomMargin) {
-               // menu is near bottom viewport edge, shift upwards
-               offset[1] = -anchorLoc[1] - _menuHeight + viewport.height - _vpBottomMargin;
+             /* verbosity level is 0 */
+
+
+             if (sName === sValueProp) {
+               if (vValue !== null && vValue !== true) {
+                 oParentEl.appendChild(oXMLDoc.createTextNode(vValue.constructor === Date ? vValue.toGMTString() : String(vValue)));
+               }
+             } else if (sName === sAttributesProp) {
+               /* verbosity level is 3 */
+               for (var sAttrib in vValue) {
+                 oParentEl.setAttribute(sAttrib, vValue[sAttrib]);
+               }
+             } else if (sName.charAt(0) === sAttrPref) {
+               oParentEl.setAttribute(sName.slice(1), vValue);
+             } else if (vValue.constructor === Array) {
+               for (var nItem = 0; nItem < vValue.length; nItem++) {
+                 oChild = oXMLDoc.createElement(sName);
+                 loadObjTree(oXMLDoc, oChild, vValue[nItem]);
+                 oParentEl.appendChild(oChild);
+               }
              } else {
-               offset[1] = 0;
+               oChild = oXMLDoc.createElement(sName);
+
+               if (vValue instanceof Object) {
+                 loadObjTree(oXMLDoc, oChild, vValue);
+               } else if (vValue !== null && vValue !== true) {
+                 oChild.appendChild(oXMLDoc.createTextNode(vValue.toString()));
+               }
+
+               oParentEl.appendChild(oChild);
              }
            }
+         }
 
-           var origin = geoVecAdd(anchorLoc, offset);
+         this.build = function (oXMLParent, nVerbosity
+         /* optional */
+         , bFreeze
+         /* optional */
+         , bNesteAttributes
+         /* optional */
+         ) {
+           var _nVerb = arguments.length > 1 && typeof nVerbosity === 'number' ? nVerbosity & 3 :
+           /* put here the default verbosity level: */
+           1;
 
-           _menu.style('left', origin[0] + 'px').style('top', origin[1] + 'px');
+           return createObjTree(oXMLParent, _nVerb, bFreeze || false, arguments.length > 3 ? bNesteAttributes : _nVerb === 3);
+         };
 
-           var tooltipSide = tooltipPosition(viewport, menuLeft);
+         this.unbuild = function (oObjTree) {
+           var oNewDoc = document.implementation.createDocument('', '', null);
+           loadObjTree(oNewDoc, oNewDoc, oObjTree);
+           return oNewDoc;
+         };
 
-           _tooltips.forEach(function (tooltip) {
-             tooltip.placement(tooltipSide);
+         this.stringify = function (oObjTree) {
+           return new XMLSerializer().serializeToString(JXON.unbuild(oObjTree));
+         };
+       }(); // var myObject = JXON.build(doc);
+       // we got our javascript object! try: alert(JSON.stringify(myObject));
+       // var newDoc = JXON.unbuild(myObject);
+       // we got our Document instance! try: alert((new XMLSerializer()).serializeToString(newDoc));
+
+       function uiSectionChanges(context) {
+         var detected = utilDetect();
+         var _discardTags = {};
+         _mainFileFetcher.get('discarded').then(function (d) {
+           _discardTags = d;
+         })["catch"](function () {
+           /* ignore */
+         });
+         var section = uiSection('changes-list', context).label(function () {
+           var history = context.history();
+           var summary = history.difference().summary();
+           return _t.html('inspector.title_count', {
+             title: {
+               html: _t.html('commit.changes')
+             },
+             count: summary.length
+           });
+         }).disclosureContent(renderDisclosureContent);
+
+         function renderDisclosureContent(selection) {
+           var history = context.history();
+           var summary = history.difference().summary();
+           var container = selection.selectAll('.commit-section').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'commit-section');
+           containerEnter.append('ul').attr('class', 'changeset-list');
+           container = containerEnter.merge(container);
+           var items = container.select('ul').selectAll('li').data(summary);
+           var itemsEnter = items.enter().append('li').attr('class', 'change-item');
+           var buttons = itemsEnter.append('button').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+           buttons.each(function (d) {
+             select(this).call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
+           });
+           buttons.append('span').attr('class', 'change-type').html(function (d) {
+             return _t.html('commit.' + d.changeType) + ' ';
+           });
+           buttons.append('strong').attr('class', 'entity-type').text(function (d) {
+             var matched = _mainPresetIndex.match(d.entity, d.graph);
+             return matched && matched.name() || utilDisplayType(d.entity.id);
            });
+           buttons.append('span').attr('class', 'entity-name').text(function (d) {
+             var name = utilDisplayName(d.entity) || '',
+                 string = '';
 
-           function displayOnLeft(viewport) {
-             if (_mainLocalizer.textDirection() === 'ltr') {
-               if (anchorLoc[0] + _menuSideMargin + _menuWidth > viewport.width - _vpSideMargin) {
-                 // right menu would be too close to the right viewport edge, go left
-                 return true;
-               } // prefer right menu
+             if (name !== '') {
+               string += ':';
+             }
+
+             return string += ' ' + name;
+           });
+           items = itemsEnter.merge(items); // Download changeset link
 
+           var changeset = new osmChangeset().update({
+             id: undefined
+           });
+           var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
+           delete changeset.id; // Export without chnageset_id
 
-               return false;
-             } else {
-               // rtl
-               if (anchorLoc[0] - _menuSideMargin - _menuWidth < _vpSideMargin) {
-                 // left menu would be too close to the left viewport edge, go right
-                 return false;
-               } // prefer left menu
+           var data = JXON.stringify(changeset.osmChangeJXON(changes));
+           var blob = new Blob([data], {
+             type: 'text/xml;charset=utf-8;'
+           });
+           var fileName = 'changes.osc';
+           var linkEnter = container.selectAll('.download-changes').data([0]).enter().append('a').attr('class', 'download-changes');
+
+           if (detected.download) {
+             // All except IE11 and Edge
+             linkEnter // download the data as a file
+             .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
+           } else {
+             // IE11 and Edge
+             linkEnter // open data uri in a new tab
+             .attr('target', '_blank').on('click.download', function () {
+               navigator.msSaveBlob(blob, fileName);
+             });
+           }
 
+           linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').call(_t.append('commit.download_changes'));
 
-               return true;
+           function mouseover(d) {
+             if (d.entity) {
+               context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
              }
            }
 
-           function tooltipPosition(viewport, menuLeft) {
-             if (_mainLocalizer.textDirection() === 'ltr') {
-               if (menuLeft) {
-                 // if there's not room for a right-side menu then there definitely
-                 // isn't room for right-side tooltips
-                 return 'left';
-               }
-
-               if (anchorLoc[0] + _menuSideMargin + _menuWidth + _tooltipWidth > viewport.width - _vpSideMargin) {
-                 // right tooltips would be too close to the right viewport edge, go left
-                 return 'left';
-               } // prefer right tooltips
-
-
-               return 'right';
-             } else {
-               // rtl
-               if (!menuLeft) {
-                 return 'right';
-               }
-
-               if (anchorLoc[0] - _menuSideMargin - _menuWidth - _tooltipWidth < _vpSideMargin) {
-                 // left tooltips would be too close to the left viewport edge, go right
-                 return 'right';
-               } // prefer left tooltips
-
+           function mouseout() {
+             context.surface().selectAll('.hover').classed('hover', false);
+           }
 
-               return 'left';
+           function click(d3_event, change) {
+             if (change.changeType !== 'deleted') {
+               var entity = change.entity;
+               context.map().zoomToEase(entity);
+               context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
              }
            }
          }
 
-         editMenu.close = function () {
-           context.map().on('move.edit-menu', null).on('drawn.edit-menu', null);
-
-           _menu.remove();
-
-           _tooltips = [];
-           dispatch$1.call('toggled', this, false);
-         };
-
-         editMenu.anchorLoc = function (val) {
-           if (!arguments.length) return _anchorLoc;
-           _anchorLoc = val;
-           _anchorLocLonLat = context.projection.invert(_anchorLoc);
-           return editMenu;
-         };
-
-         editMenu.triggerType = function (val) {
-           if (!arguments.length) return _triggerType;
-           _triggerType = val;
-           return editMenu;
-         };
+         return section;
+       }
 
-         editMenu.operations = function (val) {
-           if (!arguments.length) return _operations;
-           _operations = val;
-           return editMenu;
-         };
+       function uiCommitWarnings(context) {
+         function commitWarnings(selection) {
+           var issuesBySeverity = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all',
+             includeDisabledRules: true
+           });
 
-         return utilRebind(editMenu, dispatch$1, 'on');
-       }
+           for (var severity in issuesBySeverity) {
+             var issues = issuesBySeverity[severity];
 
-       function uiFeatureInfo(context) {
-         function update(selection) {
-           var features = context.features();
-           var stats = features.stats();
-           var count = 0;
-           var hiddenList = features.hidden().map(function (k) {
-             if (stats[k]) {
-               count += stats[k];
-               return _t('inspector.title_count', {
-                 title: _t.html('feature.' + k + '.description'),
-                 count: stats[k]
+             if (severity !== 'error') {
+               // exclude 'fixme' and similar - #8603
+               issues = issues.filter(function (issue) {
+                 return issue.type !== 'help_request';
                });
              }
 
-             return null;
-           }).filter(Boolean);
-           selection.html('');
-
-           if (hiddenList.length) {
-             var tooltipBehavior = uiTooltip().placement('top').title(function () {
-               return hiddenList.join('<br/>');
+             var section = severity + '-section';
+             var issueItem = severity + '-item';
+             var container = selection.selectAll('.' + section).data(issues.length ? [0] : []);
+             container.exit().remove();
+             var containerEnter = container.enter().append('div').attr('class', 'modal-section ' + section + ' fillL2');
+             containerEnter.append('h3').html(severity === 'warning' ? _t.html('commit.warnings') : _t.html('commit.errors'));
+             containerEnter.append('ul').attr('class', 'changeset-list');
+             container = containerEnter.merge(container);
+             var items = container.select('ul').selectAll('li').data(issues, function (d) {
+               return d.key;
              });
-             selection.append('a').attr('class', 'chip').attr('href', '#').html(_t.html('feature_info.hidden_warning', {
-               count: count
-             })).call(tooltipBehavior).on('click', function (d3_event) {
-               tooltipBehavior.hide();
-               d3_event.preventDefault(); // open the Map Data pane
-
-               context.ui().togglePanes(context.container().select('.map-panes .map-data-pane'));
+             items.exit().remove();
+             var itemsEnter = items.enter().append('li').attr('class', issueItem);
+             var buttons = itemsEnter.append('button').on('mouseover', function (d3_event, d) {
+               if (d.entityIds) {
+                 context.surface().selectAll(utilEntityOrMemberSelector(d.entityIds, context.graph())).classed('hover', true);
+               }
+             }).on('mouseout', function () {
+               context.surface().selectAll('.hover').classed('hover', false);
+             }).on('click', function (d3_event, d) {
+               context.validator().focusIssue(d);
+             });
+             buttons.call(svgIcon('#iD-icon-alert', 'pre-text'));
+             buttons.append('strong').attr('class', 'issue-message');
+             buttons.filter(function (d) {
+               return d.tooltip;
+             }).call(uiTooltip().title(function (d) {
+               return d.tooltip;
+             }).placement('top'));
+             items = itemsEnter.merge(items);
+             items.selectAll('.issue-message').html(function (d) {
+               return d.message(context);
              });
            }
-
-           selection.classed('hide', !hiddenList.length);
          }
 
-         return function (selection) {
-           update(selection);
-           context.features().on('change.feature_info', function () {
-             update(selection);
-           });
-         };
+         return commitWarnings;
        }
 
-       function uiFlash(context) {
-         var _flashTimer;
-
-         var _duration = 2000;
-         var _iconName = '#iD-icon-no';
-         var _iconClass = 'disabled';
-         var _label = '';
-
-         function flash() {
-           if (_flashTimer) {
-             _flashTimer.stop();
-           }
+       var readOnlyTags = [/^changesets_count$/, /^created_by$/, /^ideditor:/, /^imagery_used$/, /^host$/, /^locale$/, /^warnings:/, /^resolved:/, /^closed:note$/, /^closed:keepright$/, /^closed:improveosm:/, /^closed:osmose:/]; // treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
+       // from https://stackoverflow.com/a/25575009
 
-           context.container().select('.main-footer-wrap').classed('footer-hide', true).classed('footer-show', false);
-           context.container().select('.flash-wrap').classed('footer-hide', false).classed('footer-show', true);
-           var content = context.container().select('.flash-wrap').selectAll('.flash-content').data([0]); // Enter
+       var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
+       function uiCommit(context) {
+         var dispatch = dispatch$8('cancel');
 
-           var contentEnter = content.enter().append('div').attr('class', 'flash-content');
-           var iconEnter = contentEnter.append('svg').attr('class', 'flash-icon icon').append('g').attr('transform', 'translate(10,10)');
-           iconEnter.append('circle').attr('r', 9);
-           iconEnter.append('use').attr('transform', 'translate(-7,-7)').attr('width', '14').attr('height', '14');
-           contentEnter.append('div').attr('class', 'flash-text'); // Update
+         var _userDetails;
 
-           content = content.merge(contentEnter);
-           content.selectAll('.flash-icon').attr('class', 'icon flash-icon ' + (_iconClass || ''));
-           content.selectAll('.flash-icon use').attr('xlink:href', _iconName);
-           content.selectAll('.flash-text').attr('class', 'flash-text').html(_label);
-           _flashTimer = d3_timeout(function () {
-             _flashTimer = null;
-             context.container().select('.main-footer-wrap').classed('footer-hide', false).classed('footer-show', true);
-             context.container().select('.flash-wrap').classed('footer-hide', true).classed('footer-show', false);
-           }, _duration);
-           return content;
-         }
+         var _selection;
 
-         flash.duration = function (_) {
-           if (!arguments.length) return _duration;
-           _duration = _;
-           return flash;
-         };
+         var changesetEditor = uiChangesetEditor(context).on('change', changeTags);
+         var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context).on('change', changeTags).readOnlyTags(readOnlyTags);
+         var commitChanges = uiSectionChanges(context);
+         var commitWarnings = uiCommitWarnings(context);
 
-         flash.label = function (_) {
-           if (!arguments.length) return _label;
-           _label = _;
-           return flash;
-         };
+         function commit(selection) {
+           _selection = selection; // Initialize changeset if one does not exist yet.
 
-         flash.iconName = function (_) {
-           if (!arguments.length) return _iconName;
-           _iconName = _;
-           return flash;
-         };
+           if (!context.changeset) initChangeset();
+           loadDerivedChangesetTags();
+           selection.call(render);
+         }
 
-         flash.iconClass = function (_) {
-           if (!arguments.length) return _iconClass;
-           _iconClass = _;
-           return flash;
-         };
+         function initChangeset() {
+           // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
+           var commentDate = +corePreferences('commentDate') || 0;
+           var currDate = Date.now();
+           var cutoff = 2 * 86400 * 1000; // 2 days
 
-         return flash;
-       }
+           if (commentDate > currDate || currDate - commentDate > cutoff) {
+             corePreferences('comment', null);
+             corePreferences('hashtags', null);
+             corePreferences('source', null);
+           } // load in explicitly-set values, if any
 
-       function uiFullScreen(context) {
-         var element = context.container().node(); // var button = d3_select(null);
 
-         function getFullScreenFn() {
-           if (element.requestFullscreen) {
-             return element.requestFullscreen;
-           } else if (element.msRequestFullscreen) {
-             return element.msRequestFullscreen;
-           } else if (element.mozRequestFullScreen) {
-             return element.mozRequestFullScreen;
-           } else if (element.webkitRequestFullscreen) {
-             return element.webkitRequestFullscreen;
+           if (context.defaultChangesetComment()) {
+             corePreferences('comment', context.defaultChangesetComment());
+             corePreferences('commentDate', Date.now());
            }
-         }
 
-         function getExitFullScreenFn() {
-           if (document.exitFullscreen) {
-             return document.exitFullscreen;
-           } else if (document.msExitFullscreen) {
-             return document.msExitFullscreen;
-           } else if (document.mozCancelFullScreen) {
-             return document.mozCancelFullScreen;
-           } else if (document.webkitExitFullscreen) {
-             return document.webkitExitFullscreen;
+           if (context.defaultChangesetSource()) {
+             corePreferences('source', context.defaultChangesetSource());
+             corePreferences('commentDate', Date.now());
            }
-         }
-
-         function isFullScreen() {
-           return document.fullscreenElement || document.mozFullScreenElement || document.webkitFullscreenElement || document.msFullscreenElement;
-         }
-
-         function isSupported() {
-           return !!getFullScreenFn();
-         }
-
-         function fullScreen(d3_event) {
-           d3_event.preventDefault();
 
-           if (!isFullScreen()) {
-             // button.classed('active', true);
-             getFullScreenFn().apply(element);
-           } else {
-             // button.classed('active', false);
-             getExitFullScreenFn().apply(document);
+           if (context.defaultChangesetHashtags()) {
+             corePreferences('hashtags', context.defaultChangesetHashtags());
+             corePreferences('commentDate', Date.now());
            }
-         }
-
-         return function () {
-           // selection) {
-           if (!isSupported()) return; // button = selection.append('button')
-           //     .attr('title', t('full_screen'))
-           //     .on('click', fullScreen)
-           //     .call(tooltip);
-           // button.append('span')
-           //     .attr('class', 'icon full-screen');
 
            var detected = utilDetect();
-           var keys = detected.os === 'mac' ? [uiCmd('⌃⌘F'), 'f11'] : ['f11'];
-           context.keybinding().on(keys, fullScreen);
-         };
-       }
-
-       function uiGeolocate(context) {
-         var _geolocationOptions = {
-           // prioritize speed and power usage over precision
-           enableHighAccuracy: false,
-           // don't hang indefinitely getting the location
-           timeout: 6000 // 6sec
-
-         };
-
-         var _locating = uiLoading(context).message(_t.html('geolocate.locating')).blocking(true);
-
-         var _layer = context.layers().layer('geolocate');
+           var tags = {
+             comment: corePreferences('comment') || '',
+             created_by: context.cleanTagValue('iD ' + context.version),
+             host: context.cleanTagValue(detected.host),
+             locale: context.cleanTagValue(_mainLocalizer.localeCode())
+           }; // call findHashtags initially - this will remove stored
+           // hashtags if any hashtags are found in the comment - #4304
 
-         var _position;
+           findHashtags(tags, true);
+           var hashtags = corePreferences('hashtags');
 
-         var _extent;
+           if (hashtags) {
+             tags.hashtags = hashtags;
+           }
 
-         var _timeoutID;
+           var source = corePreferences('source');
 
-         var _button = select(null);
+           if (source) {
+             tags.source = source;
+           }
 
-         function click() {
-           if (context.inIntro()) return;
+           var photoOverlaysUsed = context.history().photoOverlaysUsed();
 
-           if (!_layer.enabled() && !_locating.isShown()) {
-             // This timeout ensures that we still call finish() even if
-             // the user declines to share their location in Firefox
-             _timeoutID = setTimeout(error, 10000
-             /* 10sec */
-             );
-             context.container().call(_locating); // get the latest position even if we already have one
+           if (photoOverlaysUsed.length) {
+             var sources = (tags.source || '').split(';'); // include this tag for any photo layer
 
-             navigator.geolocation.getCurrentPosition(success, error, _geolocationOptions);
-           } else {
-             _locating.close();
+             if (sources.indexOf('streetlevel imagery') === -1) {
+               sources.push('streetlevel imagery');
+             } // add the photo overlays used during editing as sources
 
-             _layer.enabled(null, false);
 
-             updateButtonState();
+             photoOverlaysUsed.forEach(function (photoOverlay) {
+               if (sources.indexOf(photoOverlay) === -1) {
+                 sources.push(photoOverlay);
+               }
+             });
+             tags.source = context.cleanTagValue(sources.join(';'));
            }
-         }
-
-         function zoomTo() {
-           context.enter(modeBrowse(context));
-           var map = context.map();
 
-           _layer.enabled(_position, true);
+           context.changeset = new osmChangeset({
+             tags: tags
+           });
+         } // Calculates read-only metadata tags based on the user's editing session and applies
+         // them to the changeset.
 
-           updateButtonState();
-           map.centerZoomEase(_extent.center(), Math.min(20, map.extentZoom(_extent)));
-         }
 
-         function success(geolocation) {
-           _position = geolocation;
-           var coords = _position.coords;
-           _extent = geoExtent([coords.longitude, coords.latitude]).padByMeters(coords.accuracy);
-           zoomTo();
-           finish();
-         }
+         function loadDerivedChangesetTags() {
+           var osm = context.connection();
+           if (!osm) return;
+           var tags = Object.assign({}, context.changeset.tags); // shallow copy
+           // assign tags for imagery used
 
-         function error() {
-           if (_position) {
-             // use the position from a previous call if we have one
-             zoomTo();
-           } else {
-             context.ui().flash.label(_t.html('geolocate.location_unavailable')).iconName('#iD-icon-geolocate')();
-           }
+           var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
+           tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
 
-           finish();
-         }
+           var osmClosed = osm.getClosedIDs();
+           var itemType;
 
-         function finish() {
-           _locating.close(); // unblock ui
+           if (osmClosed.length) {
+             tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
+           }
 
+           if (services.keepRight) {
+             var krClosed = services.keepRight.getClosedIDs();
 
-           if (_timeoutID) {
-             clearTimeout(_timeoutID);
+             if (krClosed.length) {
+               tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
+             }
            }
 
-           _timeoutID = undefined;
-         }
-
-         function updateButtonState() {
-           _button.classed('active', _layer.enabled());
-         }
+           if (services.improveOSM) {
+             var iOsmClosed = services.improveOSM.getClosedCounts();
 
-         return function (selection) {
-           if (!navigator.geolocation || !navigator.geolocation.getCurrentPosition) return;
-           _button = selection.append('button').on('click', click).call(svgIcon('#iD-icon-geolocate', 'light')).call(uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_t.html('geolocate.title')).keys([_t('geolocate.key')]));
-           context.keybinding().on(_t('geolocate.key'), click);
-         };
-       }
+             for (itemType in iOsmClosed) {
+               tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
+             }
+           }
 
-       function uiPanelBackground(context) {
-         var background = context.background();
-         var _currSourceName = null;
-         var _metadata = {};
-         var _metadataKeys = ['zoom', 'vintage', 'source', 'description', 'resolution', 'accuracy'];
+           if (services.osmose) {
+             var osmoseClosed = services.osmose.getClosedCounts();
 
-         var debouncedRedraw = debounce(redraw, 250);
+             for (itemType in osmoseClosed) {
+               tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
+             }
+           } // remove existing issue counts
 
-         function redraw(selection) {
-           var source = background.baseLayerSource();
-           if (!source) return;
-           var isDG = source.id.match(/^DigitalGlobe/i) !== null;
-           var sourceLabel = source.label();
 
-           if (_currSourceName !== sourceLabel) {
-             _currSourceName = sourceLabel;
-             _metadata = {};
+           for (var key in tags) {
+             if (key.match(/(^warnings:)|(^resolved:)/)) {
+               delete tags[key];
+             }
            }
 
-           selection.html('');
-           var list = selection.append('ul').attr('class', 'background-info');
-           list.append('li').html(_currSourceName);
-
-           _metadataKeys.forEach(function (k) {
-             // DigitalGlobe vintage is available in raster layers for now.
-             if (isDG && k === 'vintage') return;
-             list.append('li').attr('class', 'background-info-list-' + k).classed('hide', !_metadata[k]).html(_t.html('info_panels.background.' + k) + ':').append('span').attr('class', 'background-info-span-' + k).html(_metadata[k]);
-           });
-
-           debouncedGetMetadata(selection);
-           var toggleTiles = context.getDebug('tile') ? 'hide_tiles' : 'show_tiles';
-           selection.append('a').html(_t.html('info_panels.background.' + toggleTiles)).attr('href', '#').attr('class', 'button button-toggle-tiles').on('click', function (d3_event) {
-             d3_event.preventDefault();
-             context.setDebug('tile', !context.getDebug('tile'));
-             selection.call(redraw);
-           });
-
-           if (isDG) {
-             var key = source.id + '-vintage';
-             var sourceVintage = context.background().findSource(key);
-             var showsVintage = context.background().showsLayer(sourceVintage);
-             var toggleVintage = showsVintage ? 'hide_vintage' : 'show_vintage';
-             selection.append('a').html(_t.html('info_panels.background.' + toggleVintage)).attr('href', '#').attr('class', 'button button-toggle-vintage').on('click', function (d3_event) {
-               d3_event.preventDefault();
-               context.background().toggleOverlayLayer(sourceVintage);
-               selection.call(redraw);
-             });
-           } // disable if necessary
+           function addIssueCounts(issues, prefix) {
+             var issuesByType = utilArrayGroupBy(issues, 'type');
 
+             for (var issueType in issuesByType) {
+               var issuesOfType = issuesByType[issueType];
 
-           ['DigitalGlobe-Premium', 'DigitalGlobe-Standard'].forEach(function (layerId) {
-             if (source.id !== layerId) {
-               var key = layerId + '-vintage';
-               var sourceVintage = context.background().findSource(key);
+               if (issuesOfType[0].subtype) {
+                 var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
 
-               if (context.background().showsLayer(sourceVintage)) {
-                 context.background().toggleOverlayLayer(sourceVintage);
+                 for (var issueSubtype in issuesBySubtype) {
+                   var issuesOfSubtype = issuesBySubtype[issueSubtype];
+                   tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
+                 }
+               } else {
+                 tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
                }
              }
-           });
-         }
+           } // add counts of warnings generated by the user's edits
 
-         var debouncedGetMetadata = debounce(getMetadata, 250);
 
-         function getMetadata(selection) {
-           var tile = context.container().select('.layer-background img.tile-center'); // tile near viewport center
+           var warnings = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all',
+             includeIgnored: true,
+             includeDisabledRules: true
+           }).warning.filter(function (issue) {
+             return issue.type !== 'help_request';
+           }); // exclude 'fixme' and similar - #8603
 
-           if (tile.empty()) return;
-           var sourceName = _currSourceName;
-           var d = tile.datum();
-           var zoom = d && d.length >= 3 && d[2] || Math.floor(context.map().zoom());
-           var center = context.map().center(); // update zoom
+           addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits
 
-           _metadata.zoom = String(zoom);
-           selection.selectAll('.background-info-list-zoom').classed('hide', false).selectAll('.background-info-span-zoom').html(_metadata.zoom);
-           if (!d || !d.length >= 3) return;
-           background.baseLayerSource().getMetadata(center, d, function (err, result) {
-             if (err || _currSourceName !== sourceName) return; // update vintage
+           var resolvedIssues = context.validator().getResolvedIssues();
+           addIssueCounts(resolvedIssues, 'resolved');
+           context.changeset = context.changeset.update({
+             tags: tags
+           });
+         }
 
-             var vintage = result.vintage;
-             _metadata.vintage = vintage && vintage.range || _t('info_panels.background.unknown');
-             selection.selectAll('.background-info-list-vintage').classed('hide', false).selectAll('.background-info-span-vintage').html(_metadata.vintage); // update other _metadata
+         function render(selection) {
+           var osm = context.connection();
+           if (!osm) return;
+           var header = selection.selectAll('.header').data([0]);
+           var headerTitle = header.enter().append('div').attr('class', 'header fillL');
+           headerTitle.append('div').append('h2').call(_t.append('commit.title'));
+           headerTitle.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+             dispatch.call('cancel', this);
+           }).call(svgIcon('#iD-icon-close'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body); // Changeset Section
 
-             _metadataKeys.forEach(function (k) {
-               if (k === 'zoom' || k === 'vintage') return; // done already
+           var changesetSection = body.selectAll('.changeset-editor').data([0]);
+           changesetSection = changesetSection.enter().append('div').attr('class', 'modal-section changeset-editor').merge(changesetSection);
+           changesetSection.call(changesetEditor.changesetID(context.changeset.id).tags(context.changeset.tags)); // Warnings
 
-               var val = result[k];
-               _metadata[k] = val;
-               selection.selectAll('.background-info-list-' + k).classed('hide', !val).selectAll('.background-info-span-' + k).html(val);
-             });
-           });
-         }
+           body.call(commitWarnings); // Upload Explanation
 
-         var panel = function panel(selection) {
-           selection.call(redraw);
-           context.map().on('drawn.info-background', function () {
-             selection.call(debouncedRedraw);
-           }).on('move.info-background', function () {
-             selection.call(debouncedGetMetadata);
-           });
-         };
+           var saveSection = body.selectAll('.save-section').data([0]);
+           saveSection = saveSection.enter().append('div').attr('class', 'modal-section save-section fillL').merge(saveSection);
+           var prose = saveSection.selectAll('.commit-info').data([0]);
 
-         panel.off = function () {
-           context.map().on('drawn.info-background', null).on('move.info-background', null);
-         };
+           if (prose.enter().size()) {
+             // first time, make sure to update user details in prose
+             _userDetails = null;
+           }
 
-         panel.id = 'background';
-         panel.label = _t.html('info_panels.background.title');
-         panel.key = _t('info_panels.background.key');
-         return panel;
-       }
+           prose = prose.enter().append('p').attr('class', 'commit-info').call(_t.append('commit.upload_explanation')).merge(prose); // always check if this has changed, but only update prose.html()
+           // if needed, because it can trigger a style recalculation
 
-       function uiPanelHistory(context) {
-         var osm;
+           osm.userDetails(function (err, user) {
+             if (err) return;
+             if (_userDetails === user) return; // no change
 
-         function displayTimestamp(timestamp) {
-           if (!timestamp) return _t('info_panels.history.unknown');
-           var options = {
-             day: 'numeric',
-             month: 'short',
-             year: 'numeric',
-             hour: 'numeric',
-             minute: 'numeric',
-             second: 'numeric'
-           };
-           var d = new Date(timestamp);
-           if (isNaN(d.getTime())) return _t('info_panels.history.unknown');
-           return d.toLocaleString(_mainLocalizer.localeCode(), options);
-         }
+             _userDetails = user;
+             var userLink = select(document.createElement('div'));
 
-         function displayUser(selection, userName) {
-           if (!userName) {
-             selection.append('span').html(_t.html('info_panels.history.unknown'));
-             return;
-           }
+             if (user.image_url) {
+               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+             }
 
-           selection.append('span').attr('class', 'user-name').html(userName);
-           var links = selection.append('div').attr('class', 'links');
+             userLink.append('a').attr('class', 'user-info').text(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+             prose.html(_t.html('commit.upload_explanation_with_user', {
+               user: {
+                 html: userLink.html()
+               }
+             }));
+           }); // Request Review
 
-           if (osm) {
-             links.append('a').attr('class', 'user-osm-link').attr('href', osm.userURL(userName)).attr('target', '_blank').html('OSM');
-           }
+           var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
 
-           links.append('a').attr('class', 'user-hdyc-link').attr('href', 'https://hdyc.neis-one.org/?' + userName).attr('target', '_blank').attr('tabindex', -1).html('HDYC');
-         }
+           var requestReviewEnter = requestReview.enter().append('div').attr('class', 'request-review');
+           var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
+           var labelEnter = requestReviewEnter.append('label').attr('for', requestReviewDomId);
 
-         function displayChangeset(selection, changeset) {
-           if (!changeset) {
-             selection.append('span').html(_t.html('info_panels.history.unknown'));
-             return;
+           if (!labelEnter.empty()) {
+             labelEnter.call(uiTooltip().title(_t.html('commit.request_review_info')).placement('top'));
            }
 
-           selection.append('span').attr('class', 'changeset-id').html(changeset);
-           var links = selection.append('div').attr('class', 'links');
+           labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
+           labelEnter.append('span').call(_t.append('commit.request_review')); // Update
 
-           if (osm) {
-             links.append('a').attr('class', 'changeset-osm-link').attr('href', osm.changesetURL(changeset)).attr('target', '_blank').html('OSM');
-           }
+           requestReview = requestReview.merge(requestReviewEnter);
+           var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons
 
-           links.append('a').attr('class', 'changeset-osmcha-link').attr('href', 'https://osmcha.org/changesets/' + changeset).attr('target', '_blank').html('OSMCha');
-           links.append('a').attr('class', 'changeset-achavi-link').attr('href', 'https://overpass-api.de/achavi/?changeset=' + changeset).attr('target', '_blank').html('Achavi');
-         }
+           var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter
 
-         function redraw(selection) {
-           var selectedNoteID = context.selectedNoteID();
-           osm = context.connection();
-           var selected, note, entity;
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons fillL');
+           buttonEnter.append('button').attr('class', 'secondary-action button cancel-button').append('span').attr('class', 'label').call(_t.append('commit.cancel'));
+           var uploadButton = buttonEnter.append('button').attr('class', 'action button save-button');
+           uploadButton.append('span').attr('class', 'label').call(_t.append('commit.save'));
+           var uploadBlockerTooltipText = getUploadBlockerMessage(); // update
 
-           if (selectedNoteID && osm) {
-             // selected 1 note
-             selected = [_t('note.note') + ' ' + selectedNoteID];
-             note = osm.getNote(selectedNoteID);
-           } else {
-             // selected 1..n entities
-             selected = context.selectedIDs().filter(function (e) {
-               return context.hasEntity(e);
-             });
+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.selectAll('.cancel-button').on('click.cancel', function () {
+             dispatch.call('cancel', this);
+           });
+           buttonSection.selectAll('.save-button').classed('disabled', uploadBlockerTooltipText !== null).on('click.save', function () {
+             if (!select(this).classed('disabled')) {
+               this.blur(); // avoid keeping focus on the button - #4641
 
-             if (selected.length) {
-               entity = context.entity(selected[0]);
+               for (var key in context.changeset.tags) {
+                 // remove any empty keys before upload
+                 if (!key) delete context.changeset.tags[key];
+               }
+
+               context.uploader().save(context.changeset);
              }
-           }
+           }); // remove any existing tooltip
 
-           var singular = selected.length === 1 ? selected[0] : null;
-           selection.html('');
-           selection.append('h4').attr('class', 'history-heading').html(singular || _t.html('info_panels.selected', {
-             n: selected.length
-           }));
-           if (!singular) return;
+           uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
 
-           if (entity) {
-             selection.call(redrawEntity, entity);
-           } else if (note) {
-             selection.call(redrawNote, note);
-           }
-         }
+           if (uploadBlockerTooltipText) {
+             buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
+           } // Raw Tag Editor
 
-         function redrawNote(selection, note) {
-           if (!note || note.isNew()) {
-             selection.append('div').html(_t.html('info_panels.history.note_no_history'));
-             return;
-           }
 
-           var list = selection.append('ul');
-           list.append('li').html(_t.html('info_panels.history.note_comments') + ':').append('span').html(note.comments.length);
+           var tagSection = body.selectAll('.tag-section.raw-tag-editor').data([0]);
+           tagSection = tagSection.enter().append('div').attr('class', 'modal-section tag-section raw-tag-editor').merge(tagSection);
+           tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+           .render);
+           var changesSection = body.selectAll('.commit-changes-section').data([0]);
+           changesSection = changesSection.enter().append('div').attr('class', 'modal-section commit-changes-section').merge(changesSection); // Change summary
 
-           if (note.comments.length) {
-             list.append('li').html(_t.html('info_panels.history.note_created_date') + ':').append('span').html(displayTimestamp(note.comments[0].date));
-             list.append('li').html(_t.html('info_panels.history.note_created_user') + ':').call(displayUser, note.comments[0].user);
-           }
+           changesSection.call(commitChanges.render);
 
-           if (osm) {
-             selection.append('a').attr('class', 'view-history-on-osm').attr('target', '_blank').attr('href', osm.noteURL(note)).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('info_panels.history.note_link_text'));
+           function toggleRequestReview() {
+             var rr = requestReviewInput.property('checked');
+             updateChangeset({
+               review_requested: rr ? 'yes' : undefined
+             });
+             tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
+             .render);
            }
          }
 
-         function redrawEntity(selection, entity) {
-           if (!entity || entity.isNew()) {
-             selection.append('div').html(_t.html('info_panels.history.no_history'));
-             return;
-           }
+         function getUploadBlockerMessage() {
+           var errors = context.validator().getIssuesBySeverity({
+             what: 'edited',
+             where: 'all'
+           }).error;
 
-           var links = selection.append('div').attr('class', 'links');
+           if (errors.length) {
+             return _t('commit.outstanding_errors_message', {
+               count: errors.length
+             });
+           } else {
+             var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
 
-           if (osm) {
-             links.append('a').attr('class', 'view-history-on-osm').attr('href', osm.historyURL(entity)).attr('target', '_blank').attr('title', _t('info_panels.history.link_text')).html('OSM');
+             if (!hasChangesetComment) {
+               return _t('commit.comment_needed_message');
+             }
            }
 
-           links.append('a').attr('class', 'pewu-history-viewer-link').attr('href', 'https://pewu.github.io/osm-history/#/' + entity.type + '/' + entity.osmId()).attr('target', '_blank').attr('tabindex', -1).html('PeWu');
-           var list = selection.append('ul');
-           list.append('li').html(_t.html('info_panels.history.version') + ':').append('span').html(entity.version);
-           list.append('li').html(_t.html('info_panels.history.last_edit') + ':').append('span').html(displayTimestamp(entity.timestamp));
-           list.append('li').html(_t.html('info_panels.history.edited_by') + ':').call(displayUser, entity.user);
-           list.append('li').html(_t.html('info_panels.history.changeset') + ':').call(displayChangeset, entity.changeset);
+           return null;
          }
 
-         var panel = function panel(selection) {
-           selection.call(redraw);
-           context.map().on('drawn.info-history', function () {
-             selection.call(redraw);
-           });
-           context.on('enter.info-history', function () {
-             selection.call(redraw);
-           });
-         };
+         function changeTags(_, changed, onInput) {
+           if (changed.hasOwnProperty('comment')) {
+             if (changed.comment === undefined) {
+               changed.comment = '';
+             }
 
-         panel.off = function () {
-           context.map().on('drawn.info-history', null);
-           context.on('enter.info-history', null);
-         };
+             if (!onInput) {
+               corePreferences('comment', changed.comment);
+               corePreferences('commentDate', Date.now());
+             }
+           }
 
-         panel.id = 'history';
-         panel.label = _t.html('info_panels.history.title');
-         panel.key = _t('info_panels.history.key');
-         return panel;
-       }
+           if (changed.hasOwnProperty('source')) {
+             if (changed.source === undefined) {
+               corePreferences('source', null);
+             } else if (!onInput) {
+               corePreferences('source', changed.source);
+               corePreferences('commentDate', Date.now());
+             }
+           } // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
 
-       var OSM_PRECISION = 7;
-       /**
-        * Returns a localized representation of the given length measurement.
-        *
-        * @param {Number} m area in meters
-        * @param {Boolean} isImperial true for U.S. customary units; false for metric
-        */
 
-       function displayLength(m, isImperial) {
-         var d = m * (isImperial ? 3.28084 : 1);
-         var unit;
+           updateChangeset(changed, onInput);
 
-         if (isImperial) {
-           if (d >= 5280) {
-             d /= 5280;
-             unit = 'miles';
-           } else {
-             unit = 'feet';
-           }
-         } else {
-           if (d >= 1000) {
-             d /= 1000;
-             unit = 'kilometers';
-           } else {
-             unit = 'meters';
+           if (_selection) {
+             _selection.call(render);
            }
          }
 
-         return _t('units.' + unit, {
-           quantity: d.toLocaleString(_mainLocalizer.localeCode(), {
-             maximumSignificantDigits: 4
-           })
-         });
-       }
-       /**
-        * Returns a localized representation of the given area measurement.
-        *
-        * @param {Number} m2 area in square meters
-        * @param {Boolean} isImperial true for U.S. customary units; false for metric
-        */
-
-       function displayArea(m2, isImperial) {
-         var locale = _mainLocalizer.localeCode();
-         var d = m2 * (isImperial ? 10.7639111056 : 1);
-         var d1, d2, area;
-         var unit1 = '';
-         var unit2 = '';
+         function findHashtags(tags, commentOnly) {
+           var detectedHashtags = commentHashtags();
 
-         if (isImperial) {
-           if (d >= 6969600) {
-             // > 0.25mi² show mi²
-             d1 = d / 27878400;
-             unit1 = 'square_miles';
-           } else {
-             d1 = d;
-             unit1 = 'square_feet';
+           if (detectedHashtags.length) {
+             // always remove stored hashtags if there are hashtags in the comment - #4304
+             corePreferences('hashtags', null);
            }
 
-           if (d > 4356 && d < 43560000) {
-             // 0.1 - 1000 acres
-             d2 = d / 43560;
-             unit2 = 'acres';
-           }
-         } else {
-           if (d >= 250000) {
-             // > 0.25km² show km²
-             d1 = d / 1000000;
-             unit1 = 'square_kilometers';
-           } else {
-             d1 = d;
-             unit1 = 'square_meters';
+           if (!detectedHashtags.length || !commentOnly) {
+             detectedHashtags = detectedHashtags.concat(hashtagHashtags());
            }
 
-           if (d > 1000 && d < 10000000) {
-             // 0.1 - 1000 hectares
-             d2 = d / 10000;
-             unit2 = 'hectares';
-           }
-         }
+           var allLowerCase = new Set();
+           return detectedHashtags.filter(function (hashtag) {
+             // Compare tags as lowercase strings, but keep original case tags
+             var lowerCase = hashtag.toLowerCase();
 
-         area = _t('units.' + unit1, {
-           quantity: d1.toLocaleString(locale, {
-             maximumSignificantDigits: 4
-           })
-         });
+             if (!allLowerCase.has(lowerCase)) {
+               allLowerCase.add(lowerCase);
+               return true;
+             }
 
-         if (d2) {
-           return _t('units.area_pair', {
-             area1: area,
-             area2: _t('units.' + unit2, {
-               quantity: d2.toLocaleString(locale, {
-                 maximumSignificantDigits: 2
-               })
-             })
-           });
-         } else {
-           return area;
-         }
-       }
+             return false;
+           }); // Extract hashtags from `comment`
 
-       function wrap$2(x, min, max) {
-         var d = max - min;
-         return ((x - min) % d + d) % d + min;
-       }
+           function commentHashtags() {
+             var matches = (tags.comment || '').replace(/http\S*/g, '') // drop anything that looks like a URL - #4289
+             .match(hashtagRegex);
+             return matches || [];
+           } // Extract and clean hashtags from `hashtags`
 
-       function clamp$1(x, min, max) {
-         return Math.max(min, Math.min(x, max));
-       }
 
-       function displayCoordinate(deg, pos, neg) {
-         var locale = _mainLocalizer.localeCode();
-         var min = (Math.abs(deg) - Math.floor(Math.abs(deg))) * 60;
-         var sec = (min - Math.floor(min)) * 60;
-         var displayDegrees = _t('units.arcdegrees', {
-           quantity: Math.floor(Math.abs(deg)).toLocaleString(locale)
-         });
-         var displayCoordinate;
+           function hashtagHashtags() {
+             var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
+               if (s[0] !== '#') {
+                 s = '#' + s;
+               } // prepend '#'
 
-         if (Math.floor(sec) > 0) {
-           displayCoordinate = displayDegrees + _t('units.arcminutes', {
-             quantity: Math.floor(min).toLocaleString(locale)
-           }) + _t('units.arcseconds', {
-             quantity: Math.round(sec).toLocaleString(locale)
-           });
-         } else if (Math.floor(min) > 0) {
-           displayCoordinate = displayDegrees + _t('units.arcminutes', {
-             quantity: Math.round(min).toLocaleString(locale)
-           });
-         } else {
-           displayCoordinate = _t('units.arcdegrees', {
-             quantity: Math.round(Math.abs(deg)).toLocaleString(locale)
-           });
+
+               var matched = s.match(hashtagRegex);
+               return matched && matched[0];
+             }).filter(Boolean); // exclude falsy
+
+             return matches || [];
+           }
          }
 
-         if (deg === 0) {
-           return displayCoordinate;
-         } else {
-           return _t('units.coordinate', {
-             coordinate: displayCoordinate,
-             direction: _t('units.' + (deg > 0 ? pos : neg))
-           });
+         function isReviewRequested(tags) {
+           var rr = tags.review_requested;
+           if (rr === undefined) return false;
+           rr = rr.trim().toLowerCase();
+           return !(rr === '' || rr === 'no');
          }
-       }
-       /**
-        * Returns given coordinate pair in degree-minute-second format.
-        *
-        * @param {Array<Number>} coord longitude and latitude
-        */
 
+         function updateChangeset(changed, onInput) {
+           var tags = Object.assign({}, context.changeset.tags); // shallow copy
 
-       function dmsCoordinatePair(coord) {
-         return _t('units.coordinate_pair', {
-           latitude: displayCoordinate(clamp$1(coord[1], -90, 90), 'north', 'south'),
-           longitude: displayCoordinate(wrap$2(coord[0], -180, 180), 'east', 'west')
-         });
-       }
-       /**
-        * Returns the given coordinate pair in decimal format.
-        * note: unlocalized to avoid comma ambiguity - see #4765
-        *
-        * @param {Array<Number>} coord longitude and latitude
-        */
+           Object.keys(changed).forEach(function (k) {
+             var v = changed[k];
+             k = context.cleanTagKey(k);
+             if (readOnlyTags.indexOf(k) !== -1) return;
 
-       function decimalCoordinatePair(coord) {
-         return _t('units.coordinate_pair', {
-           latitude: clamp$1(coord[1], -90, 90).toFixed(OSM_PRECISION),
-           longitude: wrap$2(coord[0], -180, 180).toFixed(OSM_PRECISION)
-         });
-       }
+             if (v === undefined) {
+               delete tags[k];
+             } else if (onInput) {
+               tags[k] = v;
+             } else {
+               tags[k] = context.cleanTagValue(v);
+             }
+           });
 
-       function uiPanelLocation(context) {
-         var currLocation = '';
+           if (!onInput) {
+             // when changing the comment, override hashtags with any found in comment.
+             var commentOnly = changed.hasOwnProperty('comment') && changed.comment !== '';
+             var arr = findHashtags(tags, commentOnly);
 
-         function redraw(selection) {
-           selection.html('');
-           var list = selection.append('ul'); // Mouse coordinates
+             if (arr.length) {
+               tags.hashtags = context.cleanTagValue(arr.join(';'));
+               corePreferences('hashtags', tags.hashtags);
+             } else {
+               delete tags.hashtags;
+               corePreferences('hashtags', null);
+             }
+           } // always update userdetails, just in case user reauthenticates as someone else
 
-           var coord = context.map().mouseCoordinates();
 
-           if (coord.some(isNaN)) {
-             coord = context.map().center();
-           }
+           if (_userDetails && _userDetails.changesets_count !== undefined) {
+             var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
+
+             tags.changesets_count = String(changesetsCount); // first 100 edits - new user
 
-           list.append('li').html(dmsCoordinatePair(coord)).append('li').html(decimalCoordinatePair(coord)); // Location Info
+             if (changesetsCount <= 100) {
+               var s;
+               s = corePreferences('walkthrough_completed');
 
-           selection.append('div').attr('class', 'location-info').html(currLocation || ' ');
-           debouncedGetLocation(selection, coord);
-         }
+               if (s) {
+                 tags['ideditor:walkthrough_completed'] = s;
+               }
 
-         var debouncedGetLocation = debounce(getLocation, 250);
+               s = corePreferences('walkthrough_progress');
 
-         function getLocation(selection, coord) {
-           if (!services.geocoder) {
-             currLocation = _t('info_panels.location.unknown_location');
-             selection.selectAll('.location-info').html(currLocation);
+               if (s) {
+                 tags['ideditor:walkthrough_progress'] = s;
+               }
+
+               s = corePreferences('walkthrough_started');
+
+               if (s) {
+                 tags['ideditor:walkthrough_started'] = s;
+               }
+             }
            } else {
-             services.geocoder.reverse(coord, function (err, result) {
-               currLocation = result ? result.display_name : _t('info_panels.location.unknown_location');
-               selection.selectAll('.location-info').html(currLocation);
+             delete tags.changesets_count;
+           }
+
+           if (!fastDeepEqual(context.changeset.tags, tags)) {
+             context.changeset = context.changeset.update({
+               tags: tags
              });
            }
          }
 
-         var panel = function panel(selection) {
-           selection.call(redraw);
-           context.surface().on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'move.info-location', function () {
-             selection.call(redraw);
-           });
+         commit.reset = function () {
+           context.changeset = null;
          };
 
-         panel.off = function () {
-           context.surface().on('.info-location', null);
+         return utilRebind(commit, dispatch, 'on');
+       }
+
+       function uiConfirm(selection) {
+         var modalSelection = uiModal(selection);
+         modalSelection.select('.modal').classed('modal-alert', true);
+         var section = modalSelection.select('.content');
+         section.append('div').attr('class', 'modal-section header');
+         section.append('div').attr('class', 'modal-section message-text');
+         var buttons = section.append('div').attr('class', 'modal-section buttons cf');
+
+         modalSelection.okButton = function () {
+           buttons.append('button').attr('class', 'button ok-button action').on('click.confirm', function () {
+             modalSelection.remove();
+           }).call(_t.append('confirm.okay')).node().focus();
+           return modalSelection;
          };
 
-         panel.id = 'location';
-         panel.label = _t.html('info_panels.location.title');
-         panel.key = _t('info_panels.location.key');
-         return panel;
+         return modalSelection;
        }
 
-       function uiPanelMeasurement(context) {
-         function radiansToMeters(r) {
-           // using WGS84 authalic radius (6371007.1809 m)
-           return r * 6371007.1809;
+       function uiConflicts(context) {
+         var dispatch = dispatch$8('cancel', 'save');
+         var keybinding = utilKeybinding('conflicts');
+
+         var _origChanges;
+
+         var _conflictList;
+
+         var _shownConflictIndex;
+
+         function keybindingOn() {
+           select(document).call(keybinding.on('⎋', cancel, true));
          }
 
-         function steradiansToSqmeters(r) {
-           // http://gis.stackexchange.com/a/124857/40446
-           return r / (4 * Math.PI) * 510065621724000;
+         function keybindingOff() {
+           select(document).call(keybinding.unbind);
          }
 
-         function toLineString(feature) {
-           if (feature.type === 'LineString') return feature;
-           var result = {
-             type: 'LineString',
-             coordinates: []
-           };
-
-           if (feature.type === 'Polygon') {
-             result.coordinates = feature.coordinates[0];
-           } else if (feature.type === 'MultiPolygon') {
-             result.coordinates = feature.coordinates[0][0];
-           }
+         function tryAgain() {
+           keybindingOff();
+           dispatch.call('save');
+         }
 
-           return result;
+         function cancel() {
+           keybindingOff();
+           dispatch.call('cancel');
          }
 
-         var _isImperial = !_mainLocalizer.usesMetric();
+         function conflicts(selection) {
+           keybindingOn();
+           var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'fr').attr('title', _t('icons.close')).on('click', cancel).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h2').call(_t.append('save.conflict.header'));
+           var bodyEnter = selection.selectAll('.body').data([0]).enter().append('div').attr('class', 'body fillL');
+           var conflictsHelpEnter = bodyEnter.append('div').attr('class', 'conflicts-help').call(_t.append('save.conflict.help')); // Download changes link
 
-         function redraw(selection) {
-           var graph = context.graph();
-           var selectedNoteID = context.selectedNoteID();
-           var osm = services.osm;
-           var localeCode = _mainLocalizer.localeCode();
-           var heading;
-           var center, location, centroid;
-           var closed, geometry;
-           var totalNodeCount,
-               length = 0,
-               area = 0,
-               distance;
+           var detected = utilDetect();
+           var changeset = new osmChangeset();
+           delete changeset.id; // Export without changeset_id
 
-           if (selectedNoteID && osm) {
-             // selected 1 note
-             var note = osm.getNote(selectedNoteID);
-             heading = _t('note.note') + ' ' + selectedNoteID;
-             location = note.loc;
-             geometry = 'note';
+           var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
+           var blob = new Blob([data], {
+             type: 'text/xml;charset=utf-8;'
+           });
+           var fileName = 'changes.osc';
+           var linkEnter = conflictsHelpEnter.selectAll('.download-changes').append('a').attr('class', 'download-changes');
+
+           if (detected.download) {
+             // All except IE11 and Edge
+             linkEnter // download the data as a file
+             .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
            } else {
-             // selected 1..n entities
-             var selectedIDs = context.selectedIDs().filter(function (id) {
-               return context.hasEntity(id);
-             });
-             var selected = selectedIDs.map(function (id) {
-               return context.entity(id);
-             });
-             heading = selected.length === 1 ? selected[0].id : _t('info_panels.selected', {
-               n: selected.length
+             // IE11 and Edge
+             linkEnter // open data uri in a new tab
+             .attr('target', '_blank').on('click.download', function () {
+               navigator.msSaveBlob(blob, fileName);
              });
+           }
 
-             if (selected.length) {
-               var extent = geoExtent();
+           linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').call(_t.append('save.conflict.download_changes'));
+           bodyEnter.append('div').attr('class', 'conflict-container fillL3').call(showConflict, 0);
+           bodyEnter.append('div').attr('class', 'conflicts-done').attr('opacity', 0).style('display', 'none').call(_t.append('save.conflict.done'));
+           var buttonsEnter = bodyEnter.append('div').attr('class', 'buttons col12 joined conflicts-buttons');
+           buttonsEnter.append('button').attr('disabled', _conflictList.length > 1).attr('class', 'action conflicts-button col6').call(_t.append('save.title')).on('click.try_again', tryAgain);
+           buttonsEnter.append('button').attr('class', 'secondary-action conflicts-button col6').call(_t.append('confirm.cancel')).on('click.cancel', cancel);
+         }
 
-               for (var i in selected) {
-                 var entity = selected[i];
+         function showConflict(selection, index) {
+           index = utilWrap(index, _conflictList.length);
+           _shownConflictIndex = index;
+           var parent = select(selection.node().parentNode); // enable save button if this is the last conflict being reviewed..
 
-                 extent._extend(entity.extent(graph));
+           if (index === _conflictList.length - 1) {
+             window.setTimeout(function () {
+               parent.select('.conflicts-button').attr('disabled', null);
+               parent.select('.conflicts-done').transition().attr('opacity', 1).style('display', 'block');
+             }, 250);
+           }
 
-                 geometry = entity.geometry(graph);
+           var conflict = selection.selectAll('.conflict').data([_conflictList[index]]);
+           conflict.exit().remove();
+           var conflictEnter = conflict.enter().append('div').attr('class', 'conflict');
+           conflictEnter.append('h4').attr('class', 'conflict-count').call(_t.append('save.conflict.count', {
+             num: index + 1,
+             total: _conflictList.length
+           }));
+           conflictEnter.append('a').attr('class', 'conflict-description').attr('href', '#').text(function (d) {
+             return d.name;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             zoomToEntity(d.id);
+           });
+           var details = conflictEnter.append('div').attr('class', 'conflict-detail-container');
+           details.append('ul').attr('class', 'conflict-detail-list').selectAll('li').data(function (d) {
+             return d.details || [];
+           }).enter().append('li').attr('class', 'conflict-detail-item').html(function (d) {
+             return d;
+           });
+           details.append('div').attr('class', 'conflict-choices').call(addChoices);
+           details.append('div').attr('class', 'conflict-nav-buttons joined cf').selectAll('button').data(['previous', 'next']).enter().append('button').html(function (d) {
+             return _t.html('save.conflict.' + d);
+           }).attr('class', 'conflict-nav-button action col6').attr('disabled', function (d, i) {
+             return i === 0 && index === 0 || i === 1 && index === _conflictList.length - 1 || null;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             var container = parent.selectAll('.conflict-container');
+             var sign = d === 'previous' ? -1 : 1;
+             container.selectAll('.conflict').remove();
+             container.call(showConflict, index + sign);
+           });
+         }
 
-                 if (geometry === 'line' || geometry === 'area') {
-                   closed = entity.type === 'relation' || entity.isClosed() && !entity.isDegenerate();
-                   var feature = entity.asGeoJSON(graph);
-                   length += radiansToMeters(d3_geoLength(toLineString(feature))); // d3_geoCentroid is wrong for counterclockwise-wound polygons, so wind them clockwise
+         function addChoices(selection) {
+           var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
+             return d.choices || [];
+           }); // enter
 
-                   centroid = d3_geoCentroid(geojsonRewind(Object.assign({}, feature), true));
+           var choicesEnter = choices.enter().append('li').attr('class', 'layer');
+           var labelEnter = choicesEnter.append('label');
+           labelEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+             return d.id;
+           }).on('change', function (d3_event, d) {
+             var ul = this.parentNode.parentNode.parentNode;
+             ul.__data__.chosen = d.id;
+             choose(d3_event, ul, d);
+           });
+           labelEnter.append('span').text(function (d) {
+             return d.text;
+           }); // update
 
-                   if (closed) {
-                     area += steradiansToSqmeters(entity.area(graph));
-                   }
-                 }
-               }
+           choicesEnter.merge(choices).each(function (d) {
+             var ul = this.parentNode;
 
-               if (selected.length > 1) {
-                 geometry = null;
-                 closed = null;
-                 centroid = null;
-               }
+             if (ul.__data__.chosen === d.id) {
+               choose(null, ul, d);
+             }
+           });
+         }
 
-               if (selected.length === 2 && selected[0].type === 'node' && selected[1].type === 'node') {
-                 distance = geoSphericalDistance(selected[0].loc, selected[1].loc);
-               }
+         function choose(d3_event, ul, datum) {
+           if (d3_event) d3_event.preventDefault();
+           select(ul).selectAll('li').classed('active', function (d) {
+             return d === datum;
+           }).selectAll('input').property('checked', function (d) {
+             return d === datum;
+           });
+           var extent = geoExtent();
+           var entity;
+           entity = context.graph().hasEntity(datum.id);
+           if (entity) extent._extend(entity.extent(context.graph()));
+           datum.action();
+           entity = context.graph().hasEntity(datum.id);
+           if (entity) extent._extend(entity.extent(context.graph()));
+           zoomToEntity(datum.id, extent);
+         }
 
-               if (selected.length === 1 && selected[0].type === 'node') {
-                 location = selected[0].loc;
-               } else {
-                 totalNodeCount = utilGetAllNodes(selectedIDs, context.graph()).length;
-               }
+         function zoomToEntity(id, extent) {
+           context.surface().selectAll('.hover').classed('hover', false);
+           var entity = context.graph().hasEntity(id);
 
-               if (!location && !centroid) {
-                 center = extent.center();
-               }
+           if (entity) {
+             if (extent) {
+               context.map().trimmedExtent(extent);
+             } else {
+               context.map().zoomToEase(entity);
              }
-           }
-
-           selection.html('');
 
-           if (heading) {
-             selection.append('h4').attr('class', 'measurement-heading').html(heading);
+             context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
            }
+         } // The conflict list should be an array of objects like:
+         // {
+         //     id: id,
+         //     name: entityName(local),
+         //     details: merge.conflicts(),
+         //     chosen: 1,
+         //     choices: [
+         //         choice(id, keepMine, forceLocal),
+         //         choice(id, keepTheirs, forceRemote)
+         //     ]
+         // }
 
-           var list = selection.append('ul');
-           var coordItem;
 
-           if (geometry) {
-             list.append('li').html(_t.html('info_panels.measurement.geometry') + ':').append('span').html(closed ? _t('info_panels.measurement.closed_' + geometry) : _t('geometry.' + geometry));
-           }
+         conflicts.conflictList = function (_) {
+           if (!arguments.length) return _conflictList;
+           _conflictList = _;
+           return conflicts;
+         };
 
-           if (totalNodeCount) {
-             list.append('li').html(_t.html('info_panels.measurement.node_count') + ':').append('span').html(totalNodeCount.toLocaleString(localeCode));
-           }
+         conflicts.origChanges = function (_) {
+           if (!arguments.length) return _origChanges;
+           _origChanges = _;
+           return conflicts;
+         };
 
-           if (area) {
-             list.append('li').html(_t.html('info_panels.measurement.area') + ':').append('span').html(displayArea(area, _isImperial));
+         conflicts.shownEntityIds = function () {
+           if (_conflictList && typeof _shownConflictIndex === 'number') {
+             return [_conflictList[_shownConflictIndex].id];
            }
 
-           if (length) {
-             list.append('li').html(_t.html('info_panels.measurement.' + (closed ? 'perimeter' : 'length')) + ':').append('span').html(displayLength(length, _isImperial));
-           }
+           return [];
+         };
 
-           if (typeof distance === 'number') {
-             list.append('li').html(_t.html('info_panels.measurement.distance') + ':').append('span').html(displayLength(distance, _isImperial));
-           }
+         return utilRebind(conflicts, dispatch, 'on');
+       }
 
-           if (location) {
-             coordItem = list.append('li').html(_t.html('info_panels.measurement.location') + ':');
-             coordItem.append('span').html(dmsCoordinatePair(location));
-             coordItem.append('span').html(decimalCoordinatePair(location));
-           }
+       function uiSectionEntityIssues(context) {
+         // Does the user prefer to expand the active issue?  Useful for viewing tag diff.
+         // Expand by default so first timers see it - #6408, #8143
+         var preference = corePreferences('entity-issues.reference.expanded');
 
-           if (centroid) {
-             coordItem = list.append('li').html(_t.html('info_panels.measurement.centroid') + ':');
-             coordItem.append('span').html(dmsCoordinatePair(centroid));
-             coordItem.append('span').html(decimalCoordinatePair(centroid));
-           }
+         var _expanded = preference === null ? true : preference === 'true';
 
-           if (center) {
-             coordItem = list.append('li').html(_t.html('info_panels.measurement.center') + ':');
-             coordItem.append('span').html(dmsCoordinatePair(center));
-             coordItem.append('span').html(decimalCoordinatePair(center));
-           }
+         var _entityIDs = [];
+         var _issues = [];
 
-           if (length || area || typeof distance === 'number') {
-             var toggle = _isImperial ? 'imperial' : 'metric';
-             selection.append('a').html(_t.html('info_panels.measurement.' + toggle)).attr('href', '#').attr('class', 'button button-toggle-units').on('click', function (d3_event) {
-               d3_event.preventDefault();
-               _isImperial = !_isImperial;
-               selection.call(redraw);
-             });
-           }
-         }
+         var _activeIssueID;
 
-         var panel = function panel(selection) {
-           selection.call(redraw);
-           context.map().on('drawn.info-measurement', function () {
-             selection.call(redraw);
-           });
-           context.on('enter.info-measurement', function () {
-             selection.call(redraw);
+         var section = uiSection('entity-issues', context).shouldDisplay(function () {
+           return _issues.length > 0;
+         }).label(function () {
+           return _t.html('inspector.title_count', {
+             title: {
+               html: _t.html('issues.list_title')
+             },
+             count: _issues.length
            });
-         };
-
-         panel.off = function () {
-           context.map().on('drawn.info-measurement', null);
-           context.on('enter.info-measurement', null);
-         };
+         }).disclosureContent(renderDisclosureContent);
+         context.validator().on('validated.entity_issues', function () {
+           // Refresh on validated events
+           reloadIssues();
+           section.reRender();
+         }).on('focusedIssue.entity_issues', function (issue) {
+           makeActiveIssue(issue.id);
+         });
 
-         panel.id = 'measurement';
-         panel.label = _t.html('info_panels.measurement.title');
-         panel.key = _t('info_panels.measurement.key');
-         return panel;
-       }
+         function reloadIssues() {
+           _issues = context.validator().getSharedEntityIssues(_entityIDs, {
+             includeDisabledRules: true
+           });
+         }
 
-       var uiInfoPanels = {
-         background: uiPanelBackground,
-         history: uiPanelHistory,
-         location: uiPanelLocation,
-         measurement: uiPanelMeasurement
-       };
+         function makeActiveIssue(issueID) {
+           _activeIssueID = issueID;
+           section.selection().selectAll('.issue-container').classed('active', function (d) {
+             return d.id === _activeIssueID;
+           });
+         }
 
-       function uiInfo(context) {
-         var ids = Object.keys(uiInfoPanels);
-         var wasActive = ['measurement'];
-         var panels = {};
-         var active = {}; // create panels
+         function renderDisclosureContent(selection) {
+           selection.classed('grouped-items-area', true);
+           _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
+           var containers = selection.selectAll('.issue-container').data(_issues, function (d) {
+             return d.key;
+           }); // Exit
 
-         ids.forEach(function (k) {
-           if (!panels[k]) {
-             panels[k] = uiInfoPanels[k](context);
-             active[k] = false;
-           }
-         });
+           containers.exit().remove(); // Enter
 
-         function info(selection) {
-           function redraw() {
-             var activeids = ids.filter(function (k) {
-               return active[k];
-             }).sort();
-             var containers = infoPanels.selectAll('.panel-container').data(activeids, function (k) {
-               return k;
-             });
-             containers.exit().style('opacity', 1).transition().duration(200).style('opacity', 0).on('end', function (d) {
-               select(this).call(panels[d].off).remove();
-             });
-             var enter = containers.enter().append('div').attr('class', function (d) {
-               return 'fillD2 panel-container panel-container-' + d;
-             });
-             enter.style('opacity', 0).transition().duration(200).style('opacity', 1);
-             var title = enter.append('div').attr('class', 'panel-title fillD2');
-             title.append('h3').html(function (d) {
-               return panels[d].label;
+           var containersEnter = containers.enter().append('div').attr('class', 'issue-container');
+           var itemsEnter = containersEnter.append('div').attr('class', function (d) {
+             return 'issue severity-' + d.severity;
+           }).on('mouseover.highlight', function (d3_event, d) {
+             // don't hover-highlight the selected entity
+             var ids = d.entityIds.filter(function (e) {
+               return _entityIDs.indexOf(e) === -1;
              });
-             title.append('button').attr('class', 'close').on('click', function (d3_event, d) {
-               d3_event.stopImmediatePropagation();
-               d3_event.preventDefault();
-               info.toggle(d);
-             }).call(svgIcon('#iD-icon-close'));
-             enter.append('div').attr('class', function (d) {
-               return 'panel-content panel-content-' + d;
-             }); // redraw the panels
-
-             infoPanels.selectAll('.panel-content').each(function (d) {
-               select(this).call(panels[d]);
+             utilHighlightEntities(ids, true, context);
+           }).on('mouseout.highlight', function (d3_event, d) {
+             var ids = d.entityIds.filter(function (e) {
+               return _entityIDs.indexOf(e) === -1;
              });
-           }
+             utilHighlightEntities(ids, false, context);
+           });
+           var labelsEnter = itemsEnter.append('div').attr('class', 'issue-label');
+           var textEnter = labelsEnter.append('button').attr('class', 'issue-text').on('click', function (d3_event, d) {
+             makeActiveIssue(d.id); // expand only the clicked item
 
-           info.toggle = function (which) {
-             var activeids = ids.filter(function (k) {
-               return active[k];
-             });
+             var extent = d.extent(context.graph());
 
-             if (which) {
-               // toggle one
-               active[which] = !active[which];
+             if (extent) {
+               var setZoom = Math.max(context.map().zoom(), 19);
+               context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
+             }
+           });
+           textEnter.each(function (d) {
+             var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+             select(this).call(svgIcon(iconName, 'issue-icon'));
+           });
+           textEnter.append('span').attr('class', 'issue-message');
+           var infoButton = labelsEnter.append('button').attr('class', 'issue-info-button').attr('title', _t('icons.information')).call(svgIcon('#iD-icon-inspect'));
+           infoButton.on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             d3_event.preventDefault();
+             this.blur(); // avoid keeping focus on the button - #4641
 
-               if (activeids.length === 1 && activeids[0] === which) {
-                 // none active anymore
-                 wasActive = [which];
-               }
+             var container = select(this.parentNode.parentNode.parentNode);
+             var info = container.selectAll('.issue-info');
+             var isExpanded = info.classed('expanded');
+             _expanded = !isExpanded;
+             corePreferences('entity-issues.reference.expanded', _expanded); // update preference
 
-               context.container().select('.' + which + '-panel-toggle-item').classed('active', active[which]).select('input').property('checked', active[which]);
+             if (isExpanded) {
+               info.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
+                 info.classed('expanded', false);
+               });
              } else {
-               // toggle all
-               if (activeids.length) {
-                 wasActive = activeids;
-                 activeids.forEach(function (k) {
-                   active[k] = false;
-                 });
-               } else {
-                 wasActive.forEach(function (k) {
-                   active[k] = true;
-                 });
-               }
+               info.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1').on('end', function () {
+                 info.style('max-height', null);
+               });
              }
+           });
+           itemsEnter.append('ul').attr('class', 'issue-fix-list');
+           containersEnter.append('div').attr('class', 'issue-info' + (_expanded ? ' expanded' : '')).style('max-height', _expanded ? null : '0').style('opacity', _expanded ? '1' : '0').each(function (d) {
+             if (typeof d.reference === 'function') {
+               select(this).call(d.reference);
+             } else {
+               select(this).call(_t.append('inspector.no_documentation_key'));
+             }
+           }); // Update
 
-             redraw();
-           };
+           containers = containers.merge(containersEnter).classed('active', function (d) {
+             return d.id === _activeIssueID;
+           });
+           containers.selectAll('.issue-message').html(function (d) {
+             return d.message(context);
+           }); // fixes
 
-           var infoPanels = selection.selectAll('.info-panels').data([0]);
-           infoPanels = infoPanels.enter().append('div').attr('class', 'info-panels').merge(infoPanels);
-           redraw();
-           context.keybinding().on(uiCmd('⌘' + _t('info_panels.key')), function (d3_event) {
-             d3_event.stopImmediatePropagation();
-             d3_event.preventDefault();
-             info.toggle();
+           var fixLists = containers.selectAll('.issue-fix-list');
+           var fixes = fixLists.selectAll('.issue-fix-item').data(function (d) {
+             return d.fixes ? d.fixes(context) : [];
+           }, function (fix) {
+             return fix.id;
            });
-           ids.forEach(function (k) {
-             var key = _t('info_panels.' + k + '.key', {
-               "default": null
-             });
-             if (!key) return;
-             context.keybinding().on(uiCmd('⌘⇧' + key), function (d3_event) {
-               d3_event.stopImmediatePropagation();
-               d3_event.preventDefault();
-               info.toggle(k);
+           fixes.exit().remove();
+           var fixesEnter = fixes.enter().append('li').attr('class', 'issue-fix-item');
+           var buttons = fixesEnter.append('button').on('click', function (d3_event, d) {
+             // not all fixes are actionable
+             if (select(this).attr('disabled') || !d.onClick) return; // Don't run another fix for this issue within a second of running one
+             // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
+
+             if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
+             d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+
+             utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
+             new Promise(function (resolve, reject) {
+               d.onClick(context, resolve, reject);
+
+               if (d.onClick.length <= 1) {
+                 // if the fix doesn't take any completion parameters then consider it resolved
+                 resolve();
+               }
+             }).then(function () {
+               // revalidate whenever the fix has finished running successfully
+               context.validator().validate();
              });
+           }).on('mouseover.highlight', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, true, context);
+           }).on('mouseout.highlight', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, false, context);
            });
-         }
-
-         return info;
-       }
+           buttons.each(function (d) {
+             var iconName = d.icon || 'iD-icon-wrench';
 
-       function pointBox(loc, context) {
-         var rect = context.surfaceRect();
-         var point = context.curtainProjection(loc);
-         return {
-           left: point[0] + rect.left - 40,
-           top: point[1] + rect.top - 60,
-           width: 80,
-           height: 90
-         };
-       }
-       function pad(locOrBox, padding, context) {
-         var box;
+             if (iconName.startsWith('maki')) {
+               iconName += '-15';
+             }
 
-         if (locOrBox instanceof Array) {
-           var rect = context.surfaceRect();
-           var point = context.curtainProjection(locOrBox);
-           box = {
-             left: point[0] + rect.left,
-             top: point[1] + rect.top
-           };
-         } else {
-           box = locOrBox;
+             select(this).call(svgIcon('#' + iconName, 'fix-icon'));
+           });
+           buttons.append('span').attr('class', 'fix-message').html(function (d) {
+             return d.title;
+           });
+           fixesEnter.merge(fixes).selectAll('button').classed('actionable', function (d) {
+             return d.onClick;
+           }).attr('disabled', function (d) {
+             return d.onClick ? null : 'true';
+           }).attr('title', function (d) {
+             if (d.disabledReason) {
+               return d.disabledReason;
+             }
+
+             return null;
+           });
          }
 
-         return {
-           left: box.left - padding,
-           top: box.top - padding,
-           width: (box.width || 0) + 2 * padding,
-           height: (box.width || 0) + 2 * padding
-         };
-       }
-       function icon(name, svgklass, useklass) {
-         return '<svg class="icon ' + (svgklass || '') + '">' + '<use xlink:href="' + name + '"' + (useklass ? ' class="' + useklass + '"' : '') + '></use></svg>';
-       }
-       var helpStringReplacements; // Returns the localized HTML element for `id` with a standardized set of icon, key, and
-       // label replacements suitable for tutorials and documentation. Optionally supplemented
-       // with custom `replacements`
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
 
-       function helpHtml(id, replacements) {
-         // only load these the first time
-         if (!helpStringReplacements) helpStringReplacements = {
-           // insert icons corresponding to various UI elements
-           point_icon: icon('#iD-icon-point', 'inline'),
-           line_icon: icon('#iD-icon-line', 'inline'),
-           area_icon: icon('#iD-icon-area', 'inline'),
-           note_icon: icon('#iD-icon-note', 'inline add-note'),
-           plus: icon('#iD-icon-plus', 'inline'),
-           minus: icon('#iD-icon-minus', 'inline'),
-           layers_icon: icon('#iD-icon-layers', 'inline'),
-           data_icon: icon('#iD-icon-data', 'inline'),
-           inspect: icon('#iD-icon-inspect', 'inline'),
-           help_icon: icon('#iD-icon-help', 'inline'),
-           undo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo', 'inline'),
-           redo_icon: icon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-undo' : '#iD-icon-redo', 'inline'),
-           save_icon: icon('#iD-icon-save', 'inline'),
-           // operation icons
-           circularize_icon: icon('#iD-operation-circularize', 'inline operation'),
-           continue_icon: icon('#iD-operation-continue', 'inline operation'),
-           copy_icon: icon('#iD-operation-copy', 'inline operation'),
-           delete_icon: icon('#iD-operation-delete', 'inline operation'),
-           disconnect_icon: icon('#iD-operation-disconnect', 'inline operation'),
-           downgrade_icon: icon('#iD-operation-downgrade', 'inline operation'),
-           extract_icon: icon('#iD-operation-extract', 'inline operation'),
-           merge_icon: icon('#iD-operation-merge', 'inline operation'),
-           move_icon: icon('#iD-operation-move', 'inline operation'),
-           orthogonalize_icon: icon('#iD-operation-orthogonalize', 'inline operation'),
-           paste_icon: icon('#iD-operation-paste', 'inline operation'),
-           reflect_long_icon: icon('#iD-operation-reflect-long', 'inline operation'),
-           reflect_short_icon: icon('#iD-operation-reflect-short', 'inline operation'),
-           reverse_icon: icon('#iD-operation-reverse', 'inline operation'),
-           rotate_icon: icon('#iD-operation-rotate', 'inline operation'),
-           split_icon: icon('#iD-operation-split', 'inline operation'),
-           straighten_icon: icon('#iD-operation-straighten', 'inline operation'),
-           // interaction icons
-           leftclick: icon('#iD-walkthrough-mouse-left', 'inline operation'),
-           rightclick: icon('#iD-walkthrough-mouse-right', 'inline operation'),
-           mousewheel_icon: icon('#iD-walkthrough-mousewheel', 'inline operation'),
-           tap_icon: icon('#iD-walkthrough-tap', 'inline operation'),
-           doubletap_icon: icon('#iD-walkthrough-doubletap', 'inline operation'),
-           longpress_icon: icon('#iD-walkthrough-longpress', 'inline operation'),
-           touchdrag_icon: icon('#iD-walkthrough-touchdrag', 'inline operation'),
-           pinch_icon: icon('#iD-walkthrough-pinch-apart', 'inline operation'),
-           // insert keys; may be localized and platform-dependent
-           shift: uiCmd.display('⇧'),
-           alt: uiCmd.display('⌥'),
-           "return": uiCmd.display('↵'),
-           esc: _t.html('shortcuts.key.esc'),
-           space: _t.html('shortcuts.key.space'),
-           add_note_key: _t.html('modes.add_note.key'),
-           help_key: _t.html('help.key'),
-           shortcuts_key: _t.html('shortcuts.toggle.key'),
-           // reference localized UI labels directly so that they'll always match
-           save: _t.html('save.title'),
-           undo: _t.html('undo.title'),
-           redo: _t.html('redo.title'),
-           upload: _t.html('commit.save'),
-           point: _t.html('modes.add_point.title'),
-           line: _t.html('modes.add_line.title'),
-           area: _t.html('modes.add_area.title'),
-           note: _t.html('modes.add_note.label'),
-           circularize: _t.html('operations.circularize.title'),
-           "continue": _t.html('operations.continue.title'),
-           copy: _t.html('operations.copy.title'),
-           "delete": _t.html('operations.delete.title'),
-           disconnect: _t.html('operations.disconnect.title'),
-           downgrade: _t.html('operations.downgrade.title'),
-           extract: _t.html('operations.extract.title'),
-           merge: _t.html('operations.merge.title'),
-           move: _t.html('operations.move.title'),
-           orthogonalize: _t.html('operations.orthogonalize.title'),
-           paste: _t.html('operations.paste.title'),
-           reflect_long: _t.html('operations.reflect.title.long'),
-           reflect_short: _t.html('operations.reflect.title.short'),
-           reverse: _t.html('operations.reverse.title'),
-           rotate: _t.html('operations.rotate.title'),
-           split: _t.html('operations.split.title'),
-           straighten: _t.html('operations.straighten.title'),
-           map_data: _t.html('map_data.title'),
-           osm_notes: _t.html('map_data.layers.notes.title'),
-           fields: _t.html('inspector.fields'),
-           tags: _t.html('inspector.tags'),
-           relations: _t.html('inspector.relations'),
-           new_relation: _t.html('inspector.new_relation'),
-           turn_restrictions: _t.html('presets.fields.restrictions.label'),
-           background_settings: _t.html('background.description'),
-           imagery_offset: _t.html('background.fix_misalignment'),
-           start_the_walkthrough: _t.html('splash.walkthrough'),
-           help: _t.html('help.title'),
-           ok: _t.html('intro.ok')
-         };
-         var reps;
+           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _activeIssueID = null;
+             reloadIssues();
+           }
 
-         if (replacements) {
-           reps = Object.assign(replacements, helpStringReplacements);
-         } else {
-           reps = helpStringReplacements;
-         }
+           return section;
+         };
 
-         return _t.html(id, reps) // use keyboard key styling for shortcuts
-         .replace(/\`(.*?)\`/g, '<kbd>$1</kbd>');
+         return section;
        }
 
-       function slugify(text) {
-         return text.toString().toLowerCase().replace(/\s+/g, '-') // Replace spaces with -
-         .replace(/[^\w\-]+/g, '') // Remove all non-word chars
-         .replace(/\-\-+/g, '-') // Replace multiple - with single -
-         .replace(/^-+/, '') // Trim - from start of text
-         .replace(/-+$/, ''); // Trim - from end of text
-       } // console warning for missing walkthrough names
+       function uiPresetIcon() {
+         var _preset;
 
+         var _geometry;
 
-       var missingStrings = {};
+         var _sizeClass = 'medium';
 
-       function checkKey(key, text) {
-         if (_t(key, {
-           "default": undefined
-         }) === undefined) {
-           if (missingStrings.hasOwnProperty(key)) return; // warn once
+         function isSmall() {
+           return _sizeClass === 'small';
+         }
 
-           missingStrings[key] = text;
-           var missing = key + ': ' + text;
-           if (typeof console !== 'undefined') console.log(missing); // eslint-disable-line
+         function presetIcon(selection) {
+           selection.each(render);
          }
-       }
 
-       function localize(obj) {
-         var key; // Assign name if entity has one..
+         function getIcon(p, geom) {
+           if (isSmall() && p.isFallback && p.isFallback()) return 'iD-icon-' + p.id;
+           if (p.icon) return p.icon;
+           if (geom === 'line') return 'iD-other-line';
+           if (geom === 'vertex') return p.isFallback() ? '' : 'temaki-vertex';
+           if (isSmall() && geom === 'point') return '';
+           return 'maki-marker-stroked';
+         }
 
-         var name = obj.tags && obj.tags.name;
+         function renderPointBorder(container, drawPoint) {
+           var pointBorder = container.selectAll('.preset-icon-point-border').data(drawPoint ? [0] : []);
+           pointBorder.exit().remove();
+           var pointBorderEnter = pointBorder.enter();
+           var w = 40;
+           var h = 40;
+           pointBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-point-border').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('path').attr('transform', 'translate(11.5, 8)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
+           pointBorder = pointBorderEnter.merge(pointBorder);
+         }
 
-         if (name) {
-           key = 'intro.graph.name.' + slugify(name);
-           obj.tags.name = _t(key, {
-             "default": name
-           });
-           checkKey(key, name);
-         } // Assign street name if entity has one..
+         function renderCategoryBorder(container, category) {
+           var categoryBorder = container.selectAll('.preset-icon-category-border').data(category ? [0] : []);
+           categoryBorder.exit().remove();
+           var categoryBorderEnter = categoryBorder.enter();
+           var d = 60;
+           var svgEnter = categoryBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-category-border').attr('width', d).attr('height', d).attr('viewBox', "0 0 ".concat(d, " ").concat(d));
+           svgEnter.append('path').attr('class', 'area').attr('d', 'M9.5,7.5 L25.5,7.5 L28.5,12.5 L49.5,12.5 C51.709139,12.5 53.5,14.290861 53.5,16.5 L53.5,43.5 C53.5,45.709139 51.709139,47.5 49.5,47.5 L10.5,47.5 C8.290861,47.5 6.5,45.709139 6.5,43.5 L6.5,12.5 L9.5,7.5 Z');
+           categoryBorder = categoryBorderEnter.merge(categoryBorder);
 
+           if (category) {
+             categoryBorder.selectAll('path').attr('class', "area ".concat(category.id));
+           }
+         }
 
-         var street = obj.tags && obj.tags['addr:street'];
+         function renderCircleFill(container, drawVertex) {
+           var vertexFill = container.selectAll('.preset-icon-fill-vertex').data(drawVertex ? [0] : []);
+           vertexFill.exit().remove();
+           var vertexFillEnter = vertexFill.enter();
+           var w = 60;
+           var h = 60;
+           var d = 40;
+           vertexFillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-vertex').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('circle').attr('cx', w / 2).attr('cy', h / 2).attr('r', d / 2);
+           vertexFill = vertexFillEnter.merge(vertexFill);
+         }
 
-         if (street) {
-           key = 'intro.graph.name.' + slugify(street);
-           obj.tags['addr:street'] = _t(key, {
-             "default": street
+         function renderSquareFill(container, drawArea, tagClasses) {
+           var fill = container.selectAll('.preset-icon-fill-area').data(drawArea ? [0] : []);
+           fill.exit().remove();
+           var fillEnter = fill.enter();
+           var d = isSmall() ? 40 : 60;
+           var w = d;
+           var h = d;
+           var l = d * 2 / 3;
+           var c1 = (w - l) / 2;
+           var c2 = c1 + l;
+           fillEnter = fillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-area').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
+           ['fill', 'stroke'].forEach(function (klass) {
+             fillEnter.append('path').attr('d', "M".concat(c1, " ").concat(c1, " L").concat(c1, " ").concat(c2, " L").concat(c2, " ").concat(c2, " L").concat(c2, " ").concat(c1, " Z")).attr('class', "area ".concat(klass));
+           });
+           var rVertex = 2.5;
+           [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {
+             fillEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', rVertex);
            });
-           checkKey(key, street); // Add address details common across walkthrough..
 
-           var addrTags = ['block_number', 'city', 'county', 'district', 'hamlet', 'neighbourhood', 'postcode', 'province', 'quarter', 'state', 'subdistrict', 'suburb'];
-           addrTags.forEach(function (k) {
-             var key = 'intro.graph.' + k;
-             var tag = 'addr:' + k;
-             var val = obj.tags && obj.tags[tag];
-             var str = _t(key, {
-               "default": val
+           if (!isSmall()) {
+             var rMidpoint = 1.25;
+             [[c1, w / 2], [c2, w / 2], [h / 2, c1], [h / 2, c2]].forEach(function (point) {
+               fillEnter.append('circle').attr('class', 'midpoint').attr('cx', point[0]).attr('cy', point[1]).attr('r', rMidpoint);
              });
+           }
 
-             if (str) {
-               if (str.match(/^<.*>$/) !== null) {
-                 delete obj.tags[tag];
-               } else {
-                 obj.tags[tag] = str;
-               }
-             }
-           });
+           fill = fillEnter.merge(fill);
+           fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
+           fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
          }
 
-         return obj;
-       } // Used to detect squareness.. some duplicataion of code from actionOrthogonalize.
+         function renderLine(container, drawLine, tagClasses) {
+           var line = container.selectAll('.preset-icon-line').data(drawLine ? [0] : []);
+           line.exit().remove();
+           var lineEnter = line.enter();
+           var d = isSmall() ? 40 : 60; // draw the line parametrically
 
-       function isMostlySquare(points) {
-         // note: uses 15 here instead of the 12 from actionOrthogonalize because
-         // actionOrthogonalize can actually straighten some larger angles as it iterates
-         var threshold = 15; // degrees within right or straight
+           var w = d;
+           var h = d;
+           var y = Math.round(d * 0.72);
+           var l = Math.round(d * 0.6);
+           var r = 2.5;
+           var x1 = (w - l) / 2;
+           var x2 = x1 + l;
+           lineEnter = lineEnter.append('svg').attr('class', 'preset-icon-line').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
+           ['casing', 'stroke'].forEach(function (klass) {
+             lineEnter.append('path').attr('d', "M".concat(x1, " ").concat(y, " L").concat(x2, " ").concat(y)).attr('class', "line ".concat(klass));
+           });
+           [[x1 - 1, y], [x2 + 1, y]].forEach(function (point) {
+             lineEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
+           });
+           line = lineEnter.merge(line);
+           line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
+           line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));
+         }
 
-         var lowerBound = Math.cos((90 - threshold) * Math.PI / 180); // near right
+         function renderRoute(container, drawRoute, p) {
+           var route = container.selectAll('.preset-icon-route').data(drawRoute ? [0] : []);
+           route.exit().remove();
+           var routeEnter = route.enter();
+           var d = isSmall() ? 40 : 60; // draw the route parametrically
 
-         var upperBound = Math.cos(threshold * Math.PI / 180); // near straight
+           var w = d;
+           var h = d;
+           var y1 = Math.round(d * 0.80);
+           var y2 = Math.round(d * 0.68);
+           var l = Math.round(d * 0.6);
+           var r = 2;
+           var x1 = (w - l) / 2;
+           var x2 = x1 + l / 3;
+           var x3 = x2 + l / 3;
+           var x4 = x3 + l / 3;
+           routeEnter = routeEnter.append('svg').attr('class', 'preset-icon-route').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
+           ['casing', 'stroke'].forEach(function (klass) {
+             routeEnter.append('path').attr('d', "M".concat(x1, " ").concat(y1, " L").concat(x2, " ").concat(y2)).attr('class', "segment0 line ".concat(klass));
+             routeEnter.append('path').attr('d', "M".concat(x2, " ").concat(y2, " L").concat(x3, " ").concat(y1)).attr('class', "segment1 line ".concat(klass));
+             routeEnter.append('path').attr('d', "M".concat(x3, " ").concat(y1, " L").concat(x4, " ").concat(y2)).attr('class', "segment2 line ".concat(klass));
+           });
+           [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {
+             routeEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
+           });
+           route = routeEnter.merge(route);
 
-         for (var i = 0; i < points.length; i++) {
-           var a = points[(i - 1 + points.length) % points.length];
-           var origin = points[i];
-           var b = points[(i + 1) % points.length];
-           var dotp = geoVecNormalizedDot(a, b, origin);
-           var mag = Math.abs(dotp);
+           if (drawRoute) {
+             var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
+             var segmentPresetIDs = routeSegments[routeType];
 
-           if (mag > lowerBound && mag < upperBound) {
-             return false;
+             for (var i in segmentPresetIDs) {
+               var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
+               var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
+               route.selectAll("path.stroke.segment".concat(i)).attr('class', "segment".concat(i, " line stroke ").concat(segmentTagClasses));
+               route.selectAll("path.casing.segment".concat(i)).attr('class', "segment".concat(i, " line casing ").concat(segmentTagClasses));
+             }
            }
          }
 
-         return true;
-       }
-       function selectMenuItem(context, operation) {
-         return context.container().select('.edit-menu .edit-menu-item-' + operation);
-       }
-       function transitionTime(point1, point2) {
-         var distance = geoSphericalDistance(point1, point2);
-         if (distance === 0) return 0;else if (distance < 80) return 500;else return 1000;
-       }
-
-       function uiCurtain(containerNode) {
-         var surface = select(null),
-             tooltip = select(null),
-             darkness = select(null);
-
-         function curtain(selection) {
-           surface = selection.append('svg').attr('class', 'curtain').style('top', 0).style('left', 0);
-           darkness = surface.append('path').attr('x', 0).attr('y', 0).attr('class', 'curtain-darkness');
-           select(window).on('resize.curtain', resize);
-           tooltip = selection.append('div').attr('class', 'tooltip');
-           tooltip.append('div').attr('class', 'popover-arrow');
-           tooltip.append('div').attr('class', 'popover-inner');
-           resize();
+         function renderSvgIcon(container, picon, geom, isFramed, category, tagClasses) {
+           var isMaki = picon && /^maki-/.test(picon);
+           var isTemaki = picon && /^temaki-/.test(picon);
+           var isFa = picon && /^fa[srb]-/.test(picon);
+           var isiDIcon = picon && !(isMaki || isTemaki || isFa);
+           var icon = container.selectAll('.preset-icon').data(picon ? [0] : []);
+           icon.exit().remove();
+           icon = icon.enter().append('div').attr('class', 'preset-icon').call(svgIcon('')).merge(icon);
+           icon.attr('class', 'preset-icon ' + (geom ? geom + '-geom' : '')).classed('category', category).classed('framed', isFramed).classed('preset-icon-iD', isiDIcon);
+           icon.selectAll('svg').attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line' ? '' : tagClasses));
+           var suffix = '';
 
-           function resize() {
-             surface.attr('width', containerNode.clientWidth).attr('height', containerNode.clientHeight);
-             curtain.cut(darkness.datum());
+           if (isMaki) {
+             suffix = isSmall() && geom === 'point' ? '-11' : '-15';
            }
-         }
-         /**
-          * Reveal cuts the curtain to highlight the given box,
-          * and shows a tooltip with instructions next to the box.
-          *
-          * @param  {String|ClientRect} [box]   box used to cut the curtain
-          * @param  {String}    [text]          text for a tooltip
-          * @param  {Object}    [options]
-          * @param  {string}    [options.tooltipClass]    optional class to add to the tooltip
-          * @param  {integer}   [options.duration]        transition time in milliseconds
-          * @param  {string}    [options.buttonText]      if set, create a button with this text label
-          * @param  {function}  [options.buttonCallback]  if set, the callback for the button
-          * @param  {function}  [options.padding]         extra margin in px to put around bbox
-          * @param  {String|ClientRect} [options.tooltipBox]  box for tooltip position, if different from box for the curtain
-          */
 
+           icon.selectAll('use').attr('href', '#' + picon + suffix);
+         }
 
-         curtain.reveal = function (box, html, options) {
-           options = options || {};
+         function renderImageIcon(container, imageURL) {
+           var imageIcon = container.selectAll('img.image-icon').data(imageURL ? [0] : []);
+           imageIcon.exit().remove();
+           imageIcon = imageIcon.enter().append('img').attr('class', 'image-icon').on('load', function () {
+             return container.classed('showing-img', true);
+           }).on('error', function () {
+             return container.classed('showing-img', false);
+           }).merge(imageIcon);
+           imageIcon.attr('src', imageURL);
+         } // Route icons are drawn with a zigzag annotation underneath:
+         //     o   o
+         //    / \ /
+         //   o   o
+         // This dataset defines the styles that are used to draw the zigzag segments.
 
-           if (typeof box === 'string') {
-             box = select(box).node();
-           }
 
-           if (box && box.getBoundingClientRect) {
-             box = copyBox(box.getBoundingClientRect());
-             var containerRect = containerNode.getBoundingClientRect();
-             box.top -= containerRect.top;
-             box.left -= containerRect.left;
-           }
+         var routeSegments = {
+           bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
+           bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
+           trolleybus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
+           detour: ['highway/tertiary', 'highway/residential', 'highway/unclassified'],
+           ferry: ['route/ferry', 'route/ferry', 'route/ferry'],
+           foot: ['highway/footway', 'highway/footway', 'highway/footway'],
+           hiking: ['highway/path', 'highway/path', 'highway/path'],
+           horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
+           light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
+           monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],
+           mtb: ['highway/path', 'highway/track', 'highway/bridleway'],
+           pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
+           piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
+           power: ['power/line', 'power/line', 'power/line'],
+           road: ['highway/secondary', 'highway/primary', 'highway/trunk'],
+           subway: ['railway/subway', 'railway/subway', 'railway/subway'],
+           train: ['railway/rail', 'railway/rail', 'railway/rail'],
+           tram: ['railway/tram', 'railway/tram', 'railway/tram'],
+           waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
+         };
 
-           if (box && options.padding) {
-             box.top -= options.padding;
-             box.left -= options.padding;
-             box.bottom += options.padding;
-             box.right += options.padding;
-             box.height += options.padding * 2;
-             box.width += options.padding * 2;
-           }
+         function render() {
+           var p = _preset.apply(this, arguments);
 
-           var tooltipBox;
+           var geom = _geometry ? _geometry.apply(this, arguments) : null;
 
-           if (options.tooltipBox) {
-             tooltipBox = options.tooltipBox;
+           if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
+             geom = 'route';
+           }
 
-             if (typeof tooltipBox === 'string') {
-               tooltipBox = select(tooltipBox).node();
-             }
+           var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+           var isFallback = isSmall() && p.isFallback && p.isFallback();
+           var imageURL = showThirdPartyIcons === 'true' && p.imageURL;
+           var picon = getIcon(p, geom);
+           var isCategory = !p.setTags;
+           var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
+           var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
+           var drawLine = picon && geom === 'line' && !isFallback && !isCategory;
+           var drawArea = picon && geom === 'area' && !isFallback && !isCategory;
+           var drawRoute = picon && geom === 'route';
+           var isFramed = drawVertex || drawArea || drawLine || drawRoute || isCategory;
+           var tags = !isCategory ? p.setTags({}, geom) : {};
 
-             if (tooltipBox && tooltipBox.getBoundingClientRect) {
-               tooltipBox = copyBox(tooltipBox.getBoundingClientRect());
+           for (var k in tags) {
+             if (tags[k] === '*') {
+               tags[k] = 'yes';
              }
-           } else {
-             tooltipBox = box;
            }
 
-           if (tooltipBox && html) {
-             if (html.indexOf('**') !== -1) {
-               if (html.indexOf('<span') === 0) {
-                 html = html.replace(/^(<span.*?>)(.+?)(\*\*)/, '$1<span>$2</span>$3');
-               } else {
-                 html = html.replace(/^(.+?)(\*\*)/, '<span>$1</span>$2');
-               } // pseudo markdown bold text for the instruction section..
+           var tagClasses = svgTagClasses().getClassesString(tags, '');
+           var selection = select(this);
+           var container = selection.selectAll('.preset-icon-container').data([0]);
+           container = container.enter().append('div').attr('class', "preset-icon-container ".concat(_sizeClass)).merge(container);
+           container.classed('showing-img', !!imageURL).classed('fallback', isFallback);
+           renderCategoryBorder(container, isCategory && p);
+           renderPointBorder(container, drawPoint);
+           renderCircleFill(container, drawVertex);
+           renderSquareFill(container, drawArea, tagClasses);
+           renderLine(container, drawLine, tagClasses);
+           renderRoute(container, drawRoute, p);
+           renderSvgIcon(container, picon, geom, isFramed, isCategory, tagClasses);
+           renderImageIcon(container, imageURL);
+         }
 
+         presetIcon.preset = function (val) {
+           if (!arguments.length) return _preset;
+           _preset = utilFunctor(val);
+           return presetIcon;
+         };
 
-               html = html.replace(/\*\*(.*?)\*\*/g, '<span class="instruction">$1</span>');
-             }
+         presetIcon.geometry = function (val) {
+           if (!arguments.length) return _geometry;
+           _geometry = utilFunctor(val);
+           return presetIcon;
+         };
 
-             html = html.replace(/\*(.*?)\*/g, '<em>$1</em>'); // emphasis
+         presetIcon.sizeClass = function (val) {
+           if (!arguments.length) return _sizeClass;
+           _sizeClass = val;
+           return presetIcon;
+         };
 
-             html = html.replace(/\{br\}/g, '<br/><br/>'); // linebreak
+         return presetIcon;
+       }
 
-             if (options.buttonText && options.buttonCallback) {
-               html += '<div class="button-section">' + '<button href="#" class="button action">' + options.buttonText + '</button></div>';
-             }
+       function uiSectionFeatureType(context) {
+         var dispatch = dispatch$8('choose');
+         var _entityIDs = [];
+         var _presets = [];
 
-             var classes = 'curtain-tooltip popover tooltip arrowed in ' + (options.tooltipClass || '');
-             tooltip.classed(classes, true).selectAll('.popover-inner').html(html);
+         var _tagReference;
 
-             if (options.buttonText && options.buttonCallback) {
-               var button = tooltip.selectAll('.button-section .button.action');
-               button.on('click', function (d3_event) {
-                 d3_event.preventDefault();
-                 options.buttonCallback();
-               });
-             }
+         var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
 
-             var tip = copyBox(tooltip.node().getBoundingClientRect()),
-                 w = containerNode.clientWidth,
-                 h = containerNode.clientHeight,
-                 tooltipWidth = 200,
-                 tooltipArrow = 5,
-                 side,
-                 pos; // hack: this will have bottom placement,
-             // so need to reserve extra space for the tooltip illustration.
+         function renderDisclosureContent(selection) {
+           selection.classed('preset-list-item', true);
+           selection.classed('mixed-types', _presets.length > 1);
+           var presetButtonWrap = selection.selectAll('.preset-list-button-wrap').data([0]).enter().append('div').attr('class', 'preset-list-button-wrap');
+           var presetButton = presetButtonWrap.append('button').attr('class', 'preset-list-button preset-reset').call(uiTooltip().title(_t.html('inspector.back_tooltip')).placement('bottom'));
+           presetButton.append('div').attr('class', 'preset-icon-container');
+           presetButton.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+           presetButtonWrap.append('div').attr('class', 'accessory-buttons');
+           var tagReferenceBodyWrap = selection.selectAll('.tag-reference-body-wrap').data([0]);
+           tagReferenceBodyWrap = tagReferenceBodyWrap.enter().append('div').attr('class', 'tag-reference-body-wrap').merge(tagReferenceBodyWrap); // update header
 
-             if (options.tooltipClass === 'intro-mouse') {
-               tip.height += 80;
-             } // trim box dimensions to just the portion that fits in the container..
+           if (_tagReference) {
+             selection.selectAll('.preset-list-button-wrap .accessory-buttons').style('display', _presets.length === 1 ? null : 'none').call(_tagReference.button);
+             tagReferenceBodyWrap.style('display', _presets.length === 1 ? null : 'none').call(_tagReference.body);
+           }
 
+           selection.selectAll('.preset-reset').on('click', function () {
+             dispatch.call('choose', this, _presets);
+           }).on('pointerdown pointerup mousedown mouseup', function (d3_event) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+           });
+           var geometries = entityGeometries();
+           selection.select('.preset-list-item button').call(uiPresetIcon().geometry(_presets.length === 1 ? geometries.length === 1 && geometries[0] : null).preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point')));
+           var names = _presets.length === 1 ? [_presets[0].nameLabel(), _presets[0].subtitleLabel()].filter(Boolean) : [_t('inspector.multiple_types')];
+           var label = selection.select('.label-inner');
+           var nameparts = label.selectAll('.namepart').data(names, function (d) {
+             return d;
+           });
+           nameparts.exit().remove();
+           nameparts.enter().append('div').attr('class', 'namepart').html(function (d) {
+             return d;
+           });
+         }
 
-             if (tooltipBox.top + tooltipBox.height > h) {
-               tooltipBox.height -= tooltipBox.top + tooltipBox.height - h;
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return section;
+         };
+
+         section.presets = function (val) {
+           if (!arguments.length) return _presets; // don't reload the same preset
+
+           if (!utilArrayIdentical(val, _presets)) {
+             _presets = val;
+
+             if (_presets.length === 1) {
+               _tagReference = uiTagReference(_presets[0].reference()).showing(false);
              }
+           }
 
-             if (tooltipBox.left + tooltipBox.width > w) {
-               tooltipBox.width -= tooltipBox.left + tooltipBox.width - w;
-             } // determine tooltip placement..
+           return section;
+         };
 
+         function entityGeometries() {
+           var counts = {};
 
-             if (tooltipBox.top + tooltipBox.height < 100) {
-               // tooltip below box..
-               side = 'bottom';
-               pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top + tooltipBox.height];
-             } else if (tooltipBox.top > h - 140) {
-               // tooltip above box..
-               side = 'top';
-               pos = [tooltipBox.left + tooltipBox.width / 2 - tip.width / 2, tooltipBox.top - tip.height];
-             } else {
-               // tooltip to the side of the tooltipBox..
-               var tipY = tooltipBox.top + tooltipBox.height / 2 - tip.height / 2;
+           for (var i in _entityIDs) {
+             var geometry = context.graph().geometry(_entityIDs[i]);
+             if (!counts[geometry]) counts[geometry] = 0;
+             counts[geometry] += 1;
+           }
 
-               if (_mainLocalizer.textDirection() === 'rtl') {
-                 if (tooltipBox.left - tooltipWidth - tooltipArrow < 70) {
-                   side = 'right';
-                   pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
-                 } else {
-                   side = 'left';
-                   pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-                 }
-               } else {
-                 if (tooltipBox.left + tooltipBox.width + tooltipArrow + tooltipWidth > w - 70) {
-                   side = 'left';
-                   pos = [tooltipBox.left - tooltipWidth - tooltipArrow, tipY];
-                 } else {
-                   side = 'right';
-                   pos = [tooltipBox.left + tooltipBox.width + tooltipArrow, tipY];
-                 }
-               }
-             }
+           return Object.keys(counts).sort(function (geom1, geom2) {
+             return counts[geom2] - counts[geom1];
+           });
+         }
 
-             if (options.duration !== 0 || !tooltip.classed(side)) {
-               tooltip.call(uiToggle(true));
-             }
+         return utilRebind(section, dispatch, 'on');
+       }
 
-             tooltip.style('top', pos[1] + 'px').style('left', pos[0] + 'px').attr('class', classes + ' ' + side); // shift popover-inner if it is very close to the top or bottom edge
-             // (doesn't affect the placement of the popover-arrow)
+       function uiSectionPresetFields(context) {
+         var section = uiSection('preset-fields', context).label(_t.html('inspector.fields')).disclosureContent(renderDisclosureContent);
+         var dispatch = dispatch$8('change', 'revert');
+         var formFields = uiFormFields(context);
 
-             var shiftY = 0;
+         var _state;
 
-             if (side === 'left' || side === 'right') {
-               if (pos[1] < 60) {
-                 shiftY = 60 - pos[1];
-               } else if (pos[1] + tip.height > h - 100) {
-                 shiftY = h - pos[1] - tip.height - 100;
-               }
-             }
+         var _fieldsArr;
 
-             tooltip.selectAll('.popover-inner').style('top', shiftY + 'px');
-           } else {
-             tooltip.classed('in', false).call(uiToggle(false));
-           }
+         var _presets = [];
 
-           curtain.cut(box, options.duration);
-           return tooltip;
-         };
+         var _tags;
 
-         curtain.cut = function (datum, duration) {
-           darkness.datum(datum).interrupt();
-           var selection;
+         var _entityIDs;
 
-           if (duration === 0) {
-             selection = darkness;
-           } else {
-             selection = darkness.transition().duration(duration || 600).ease(linear$1);
-           }
+         function renderDisclosureContent(selection) {
+           if (!_fieldsArr) {
+             var graph = context.graph();
+             var geometries = Object.keys(_entityIDs.reduce(function (geoms, entityID) {
+               geoms[graph.entity(entityID).geometry(graph)] = true;
+               return geoms;
+             }, {}));
+             var presetsManager = _mainPresetIndex;
+             var allFields = [];
+             var allMoreFields = [];
+             var sharedTotalFields;
 
-           selection.attr('d', function (d) {
-             var containerWidth = containerNode.clientWidth;
-             var containerHeight = containerNode.clientHeight;
-             var string = 'M 0,0 L 0,' + containerHeight + ' L ' + containerWidth + ',' + containerHeight + 'L' + containerWidth + ',0 Z';
-             if (!d) return string;
-             return string + 'M' + d.left + ',' + d.top + 'L' + d.left + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + (d.top + d.height) + 'L' + (d.left + d.width) + ',' + d.top + 'Z';
-           });
-         };
+             _presets.forEach(function (preset) {
+               var fields = preset.fields();
+               var moreFields = preset.moreFields();
+               allFields = utilArrayUnion(allFields, fields);
+               allMoreFields = utilArrayUnion(allMoreFields, moreFields);
 
-         curtain.remove = function () {
-           surface.remove();
-           tooltip.remove();
-           select(window).on('resize.curtain', null);
-         }; // ClientRects are immutable, so copy them to an object,
-         // in case we need to trim the height/width.
+               if (!sharedTotalFields) {
+                 sharedTotalFields = utilArrayUnion(fields, moreFields);
+               } else {
+                 sharedTotalFields = sharedTotalFields.filter(function (field) {
+                   return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
+                 });
+               }
+             });
 
+             var sharedFields = allFields.filter(function (field) {
+               return sharedTotalFields.indexOf(field) !== -1;
+             });
+             var sharedMoreFields = allMoreFields.filter(function (field) {
+               return sharedTotalFields.indexOf(field) !== -1;
+             });
+             _fieldsArr = [];
+             sharedFields.forEach(function (field) {
+               if (field.matchAllGeometry(geometries)) {
+                 _fieldsArr.push(uiField(context, field, _entityIDs));
+               }
+             });
+             var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
 
-         function copyBox(src) {
-           return {
-             top: src.top,
-             right: src.right,
-             bottom: src.bottom,
-             left: src.left,
-             width: src.width,
-             height: src.height
-           };
-         }
+             if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
+               _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
+             }
 
-         return curtain;
-       }
+             var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
+             additionalFields.sort(function (field1, field2) {
+               return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
+             });
+             additionalFields.forEach(function (field) {
+               if (sharedFields.indexOf(field) === -1 && field.matchAllGeometry(geometries)) {
+                 _fieldsArr.push(uiField(context, field, _entityIDs, {
+                   show: false
+                 }));
+               }
+             });
 
-       function uiIntroWelcome(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var chapter = {
-           title: 'intro.welcome.title'
-         };
+             _fieldsArr.forEach(function (field) {
+               field.on('change', function (t, onInput) {
+                 dispatch.call('change', field, _entityIDs, t, onInput);
+               }).on('revert', function (keys) {
+                 dispatch.call('revert', field, keys);
+               });
+             });
+           }
 
-         function welcome() {
-           context.map().centerZoom([-85.63591, 41.94285], 19);
-           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.welcome'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: practice
+           _fieldsArr.forEach(function (field) {
+             field.state(_state).tags(_tags);
            });
-         }
 
-         function practice() {
-           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.practice'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: words
+           selection.call(formFields.fieldsArr(_fieldsArr).state(_state).klass('grouped-items-area'));
+           selection.selectAll('.wrap-form-field input').on('keydown', function (d3_event) {
+             // if user presses enter, and combobox is not active, accept edits..
+             if (d3_event.keyCode === 13 && // ↩ Return
+             context.container().select('.combobox').empty()) {
+               context.enter(modeBrowse(context));
+             }
            });
          }
 
-         function words() {
-           reveal('.intro-nav-wrap .chapter-welcome', helpHtml('intro.welcome.words'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: chapters
-           });
-         }
+         section.presets = function (val) {
+           if (!arguments.length) return _presets;
 
-         function chapters() {
-           dispatch$1.call('done');
-           reveal('.intro-nav-wrap .chapter-navigation', helpHtml('intro.welcome.chapters', {
-             next: _t('intro.navigation.title')
-           }));
-         }
+           if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
+             _presets = val;
+             _fieldsArr = null;
+           }
 
-         chapter.enter = function () {
-           welcome();
+           return section;
          };
 
-         chapter.exit = function () {
-           context.container().select('.curtain-tooltip.intro-mouse').selectAll('.counter').remove();
+         section.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return section;
          };
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
+         section.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val; // Don't reset _fieldsArr here.
+
+           return section;
          };
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
 
-       function uiIntroNavigation(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var timeouts = [];
-         var hallId = 'n2061';
-         var townHall = [-85.63591, 41.94285];
-         var springStreetId = 'w397';
-         var springStreetEndId = 'n1834';
-         var springStreet = [-85.63582, 41.94255];
-         var onewayField = _mainPresetIndex.field('oneway');
-         var maxspeedField = _mainPresetIndex.field('maxspeed');
-         var chapter = {
-           title: 'intro.navigation.title'
+           if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _fieldsArr = null;
+           }
+
+           return section;
          };
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
+         return utilRebind(section, dispatch, 'on');
+       }
+
+       function uiSectionRawMemberEditor(context) {
+         var section = uiSection('raw-member-editor', context).shouldDisplay(function () {
+           if (!_entityIDs || _entityIDs.length !== 1) return false;
+           var entity = context.hasEntity(_entityIDs[0]);
+           return entity && entity.type === 'relation';
+         }).label(function () {
+           var entity = context.hasEntity(_entityIDs[0]);
+           if (!entity) return '';
+           var gt = entity.members.length > _maxMembers ? '>' : '';
+           var count = gt + entity.members.slice(0, _maxMembers).length;
+           return _t.html('inspector.title_count', {
+             title: {
+               html: _t.html('inspector.members')
+             },
+             count: count
+           });
+         }).disclosureContent(renderDisclosureContent);
+         var taginfo = services.taginfo;
+
+         var _entityIDs;
+
+         var _maxMembers = 1000;
+
+         function downloadMember(d3_event, d) {
+           d3_event.preventDefault(); // display the loading indicator
+
+           select(this.parentNode).classed('tag-reference-loading', true);
+           context.loadEntity(d.id, function () {
+             section.reRender();
+           });
          }
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
+         function zoomToMember(d3_event, d) {
            d3_event.preventDefault();
-         }
+           var entity = context.entity(d.id);
+           context.map().zoomToEase(entity); // highlight the feature in case it wasn't previously on-screen
 
-         function isTownHallSelected() {
-           var ids = context.selectedIDs();
-           return ids.length === 1 && ids[0] === hallId;
+           utilHighlightEntities([d.id], true, context);
          }
 
-         function dragMap() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var msec = transitionTime(townHall, context.map().center());
+         function selectMember(d3_event, d) {
+           d3_event.preventDefault(); // remove the hover-highlight styling
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
+           utilHighlightEntities([d.id], false, context);
+           var entity = context.entity(d.id);
+           var mapExtent = context.map().extent();
+
+           if (!entity.intersects(mapExtent, context.graph())) {
+             // zoom to the entity if its extent is not visible now
+             context.map().zoomToEase(entity);
            }
 
-           context.map().centerZoomEase(townHall, 19, msec);
-           timeout(function () {
-             var centerStart = context.map().center();
-             var textId = context.lastPointerType() === 'mouse' ? 'drag' : 'drag_touch';
-             var dragString = helpHtml('intro.navigation.map_info') + '{br}' + helpHtml('intro.navigation.' + textId);
-             reveal('.surface', dragString);
-             context.map().on('drawn.intro', function () {
-               reveal('.surface', dragString, {
-                 duration: 0
-               });
-             });
-             context.map().on('move.intro', function () {
-               var centerNow = context.map().center();
+           context.enter(modeSelect(context, [d.id]));
+         }
 
-               if (centerStart[0] !== centerNow[0] || centerStart[1] !== centerNow[1]) {
-                 context.map().on('move.intro', null);
-                 timeout(function () {
-                   continueTo(zoomMap);
-                 }, 3000);
-               }
-             });
-           }, msec + 100);
+         function changeRole(d3_event, d) {
+           var oldRole = d.role;
+           var newRole = context.cleanRelationRole(select(this).property('value'));
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
+           if (oldRole !== newRole) {
+             var member = {
+               id: d.id,
+               type: d.type,
+               role: newRole
+             };
+             context.perform(actionChangeMember(d.relation.id, member, d.index), _t('operations.change_role.annotation', {
+               n: 1
+             }));
+             context.validator().validate();
            }
          }
 
-         function zoomMap() {
-           var zoomStart = context.map().zoom();
-           var textId = context.lastPointerType() === 'mouse' ? 'zoom' : 'zoom_touch';
-           var zoomString = helpHtml('intro.navigation.' + textId);
-           reveal('.surface', zoomString);
-           context.map().on('drawn.intro', function () {
-             reveal('.surface', zoomString, {
-               duration: 0
-             });
-           });
-           context.map().on('move.intro', function () {
-             if (context.map().zoom() !== zoomStart) {
-               context.map().on('move.intro', null);
-               timeout(function () {
-                 continueTo(features);
-               }, 3000);
-             }
-           });
+         function deleteMember(d3_event, d) {
+           // remove the hover-highlight styling
+           utilHighlightEntities([d.id], false, context);
+           context.perform(actionDeleteMember(d.relation.id, d.index), _t('operations.delete_member.annotation', {
+             n: 1
+           }));
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
+           if (!context.hasEntity(d.relation.id)) {
+             // Removing the last member will also delete the relation.
+             // If this happens we need to exit the selection mode
+             context.enter(modeBrowse(context));
+           } else {
+             // Changing the mode also runs `validate`, but otherwise we need to
+             // rerun it manually
+             context.validator().validate();
            }
          }
 
-         function features() {
-           var onClick = function onClick() {
-             continueTo(pointsLinesAreas);
-           };
-
-           reveal('.surface', helpHtml('intro.navigation.features'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.map().on('drawn.intro', function () {
-             reveal('.surface', helpHtml('intro.navigation.features'), {
-               duration: 0,
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: onClick
+         function renderDisclosureContent(selection) {
+           var entityID = _entityIDs[0];
+           var memberships = [];
+           var entity = context.entity(entityID);
+           entity.members.slice(0, _maxMembers).forEach(function (member, index) {
+             memberships.push({
+               index: index,
+               id: member.id,
+               type: member.type,
+               role: member.role,
+               relation: entity,
+               member: context.hasEntity(member.id),
+               domId: utilUniqueDomId(entityID + '-member-' + index)
              });
            });
+           var list = selection.selectAll('.member-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+           var items = list.selectAll('li').data(memberships, function (d) {
+             return osmEntity.key(d.relation) + ',' + d.index + ',' + (d.member ? osmEntity.key(d.member) : 'incomplete');
+           });
+           items.exit().each(unbind).remove();
+           var itemsEnter = items.enter().append('li').attr('class', 'member-row form-field').classed('member-incomplete', function (d) {
+             return !d.member;
+           });
+           itemsEnter.each(function (d) {
+             var item = select(this);
+             var label = item.append('label').attr('class', 'field-label').attr('for', d.domId);
 
-           function continueTo(nextStep) {
-             context.map().on('drawn.intro', null);
-             nextStep();
-           }
-         }
+             if (d.member) {
+               // highlight the member feature in the map while hovering on the list item
+               item.on('mouseover', function () {
+                 utilHighlightEntities([d.id], true, context);
+               }).on('mouseout', function () {
+                 utilHighlightEntities([d.id], false, context);
+               });
+               var labelLink = label.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectMember);
+               labelLink.append('span').attr('class', 'member-entity-type').text(function (d) {
+                 var matched = _mainPresetIndex.match(d.member, context.graph());
+                 return matched && matched.name() || utilDisplayType(d.member.id);
+               });
+               labelLink.append('span').attr('class', 'member-entity-name').text(function (d) {
+                 return utilDisplayName(d.member);
+               });
+               label.append('button').attr('title', _t('icons.remove')).attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete'));
+               label.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToMember);
+             } else {
+               var labelText = label.append('span').attr('class', 'label-text');
+               labelText.append('span').attr('class', 'member-entity-type').call(_t.append('inspector.' + d.type, {
+                 id: d.id
+               }));
+               labelText.append('span').attr('class', 'member-entity-name').call(_t.append('inspector.incomplete', {
+                 id: d.id
+               }));
+               label.append('button').attr('class', 'member-download').attr('title', _t('icons.download')).call(svgIcon('#iD-icon-load')).on('click', downloadMember);
+             }
+           });
+           var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+           wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+             return d.domId;
+           }).property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto);
 
-         function pointsLinesAreas() {
-           var onClick = function onClick() {
-             continueTo(nodesWays);
-           };
+           if (taginfo) {
+             wrapEnter.each(bindTypeahead);
+           } // update
 
-           reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.map().on('drawn.intro', function () {
-             reveal('.surface', helpHtml('intro.navigation.points_lines_areas'), {
-               duration: 0,
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: onClick
-             });
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('drawn.intro', null);
-             nextStep();
-           }
-         }
+           items = items.merge(itemsEnter).order();
+           items.select('input.member-role').property('value', function (d) {
+             return d.role;
+           }).on('blur', changeRole).on('change', changeRole);
+           items.select('button.member-delete').on('click', deleteMember);
+           var dragOrigin, targetIndex;
+           items.call(d3_drag().on('start', function (d3_event) {
+             dragOrigin = {
+               x: d3_event.x,
+               y: d3_event.y
+             };
+             targetIndex = null;
+           }).on('drag', function (d3_event) {
+             var x = d3_event.x - dragOrigin.x,
+                 y = d3_event.y - dragOrigin.y;
+             if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
+             Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
+             var index = items.nodes().indexOf(this);
+             select(this).classed('dragging', true);
+             targetIndex = null;
+             selection.selectAll('li.member-row').style('transform', function (d2, index2) {
+               var node = select(this).node();
 
-         function nodesWays() {
-           var onClick = function onClick() {
-             continueTo(clickTownHall);
-           };
+               if (index === index2) {
+                 return 'translate(' + x + 'px, ' + y + 'px)';
+               } else if (index2 > index && d3_event.y > node.offsetTop) {
+                 if (targetIndex === null || index2 > targetIndex) {
+                   targetIndex = index2;
+                 }
 
-           reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.map().on('drawn.intro', function () {
-             reveal('.surface', helpHtml('intro.navigation.nodes_ways'), {
-               duration: 0,
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: onClick
-             });
-           });
+                 return 'translateY(-100%)';
+               } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
+                 if (targetIndex === null || index2 < targetIndex) {
+                   targetIndex = index2;
+                 }
 
-           function continueTo(nextStep) {
-             context.map().on('drawn.intro', null);
-             nextStep();
-           }
-         }
+                 return 'translateY(100%)';
+               }
 
-         function clickTownHall() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var entity = context.hasEntity(hallId);
-           if (!entity) return;
-           reveal(null, null, {
-             duration: 0
-           });
-           context.map().centerZoomEase(entity.loc, 19, 500);
-           timeout(function () {
-             var entity = context.hasEntity(hallId);
-             if (!entity) return;
-             var box = pointBox(entity.loc, context);
-             var textId = context.lastPointerType() === 'mouse' ? 'click_townhall' : 'tap_townhall';
-             reveal(box, helpHtml('intro.navigation.' + textId));
-             context.map().on('move.intro drawn.intro', function () {
-               var entity = context.hasEntity(hallId);
-               if (!entity) return;
-               var box = pointBox(entity.loc, context);
-               reveal(box, helpHtml('intro.navigation.' + textId), {
-                 duration: 0
-               });
-             });
-             context.on('enter.intro', function () {
-               if (isTownHallSelected()) continueTo(selectedTownHall);
+               return null;
              });
-           }, 550); // after centerZoomEase
+           }).on('end', function (d3_event, d) {
+             if (!select(this).classed('dragging')) return;
+             var index = items.nodes().indexOf(this);
+             select(this).classed('dragging', false);
+             selection.selectAll('li.member-row').style('transform', null);
 
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
+             if (targetIndex !== null) {
+               // dragged to a new position, reorder
+               context.perform(actionMoveMember(d.relation.id, index, targetIndex), _t('operations.reorder_members.annotation'));
+               context.validator().validate();
              }
-           });
+           }));
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+           function bindTypeahead(d) {
+             var row = select(this);
+             var role = row.selectAll('input.member-role');
+             var origValue = role.property('value');
 
-         function selectedTownHall() {
-           if (!isTownHallSelected()) return clickTownHall();
-           var entity = context.hasEntity(hallId);
-           if (!entity) return clickTownHall();
-           var box = pointBox(entity.loc, context);
+             function sort(value, data) {
+               var sameletter = [];
+               var other = [];
 
-           var onClick = function onClick() {
-             continueTo(editorTownHall);
-           };
+               for (var i = 0; i < data.length; i++) {
+                 if (data[i].value.substring(0, value.length) === value) {
+                   sameletter.push(data[i]);
+                 } else {
+                   other.push(data[i]);
+                 }
+               }
 
-           reveal(box, helpHtml('intro.navigation.selected_townhall'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.map().on('move.intro drawn.intro', function () {
-             var entity = context.hasEntity(hallId);
-             if (!entity) return;
-             var box = pointBox(entity.loc, context);
-             reveal(box, helpHtml('intro.navigation.selected_townhall'), {
-               duration: 0,
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: onClick
-             });
-           });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
+               return sameletter.concat(other);
              }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+             role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+               // The `geometry` param is used in the `taginfo.js` interface for
+               // filtering results, as a key into the `tag_members_fractions`
+               // object.  If we don't know the geometry because the member is
+               // not yet downloaded, it's ok to guess based on type.
+               var geometry;
+
+               if (d.member) {
+                 geometry = context.graph().geometry(d.member.id);
+               } else if (d.type === 'relation') {
+                 geometry = 'relation';
+               } else if (d.type === 'way') {
+                 geometry = 'line';
+               } else {
+                 geometry = 'point';
+               }
+
+               var rtype = entity.tags.type;
+               taginfo.roles({
+                 debounce: true,
+                 rtype: rtype || '',
+                 geometry: geometry,
+                 query: role
+               }, function (err, data) {
+                 if (!err) callback(sort(role, data));
+               });
+             }).on('cancel', function () {
+               role.property('value', origValue);
+             }));
            }
-         }
 
-         function editorTownHall() {
-           if (!isTownHallSelected()) return clickTownHall(); // disallow scrolling
+           function unbind() {
+             var row = select(this);
+             row.selectAll('input.member-role').call(uiCombobox.off, context);
+           }
+         }
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return section;
+         };
 
-           var onClick = function onClick() {
-             continueTo(presetTownHall);
-           };
+         return section;
+       }
 
-           reveal('.entity-editor-pane', helpHtml('intro.navigation.editor_townhall'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.on('exit.intro', function () {
-             continueTo(clickTownHall);
-           });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
-             }
+       function actionDeleteMembers(relationId, memberIndexes) {
+         return function (graph) {
+           // Remove the members in descending order so removals won't shift what members
+           // are at the remaining indexes
+           memberIndexes.sort(function (a, b) {
+             return b - a;
            });
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             nextStep();
+           for (var i in memberIndexes) {
+             graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
            }
-         }
 
-         function presetTownHall() {
-           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
+           return graph;
+         };
+       }
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
+       function uiSectionRawMembershipEditor(context) {
+         var section = uiSection('raw-membership-editor', context).shouldDisplay(function () {
+           return _entityIDs && _entityIDs.length;
+         }).label(function () {
+           var parents = getSharedParentRelations();
+           var gt = parents.length > _maxMemberships ? '>' : '';
+           var count = gt + parents.slice(0, _maxMemberships).length;
+           return _t.html('inspector.title_count', {
+             title: {
+               html: _t.html('inspector.relations')
+             },
+             count: count
+           });
+         }).disclosureContent(renderDisclosureContent);
+         var taginfo = services.taginfo;
+         var nearbyCombo = uiCombobox(context, 'parent-relation').minItems(1).fetcher(fetchNearbyRelations).itemsMouseEnter(function (d3_event, d) {
+           if (d.relation) utilHighlightEntities([d.relation.id], true, context);
+         }).itemsMouseLeave(function (d3_event, d) {
+           if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+         });
+         var _inChange = false;
+         var _entityIDs = [];
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel); // preset match, in case the user happened to change it.
+         var _showBlank;
 
-           var entity = context.entity(context.selectedIDs()[0]);
-           var preset = _mainPresetIndex.match(entity, context.graph());
+         var _maxMemberships = 1000;
 
-           var onClick = function onClick() {
-             continueTo(fieldsTownHall);
-           };
+         function getSharedParentRelations() {
+           var parents = [];
 
-           reveal('.entity-editor-pane .section-feature-type', helpHtml('intro.navigation.preset_townhall', {
-             preset: preset.name()
-           }), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.on('exit.intro', function () {
-             continueTo(clickTownHall);
-           });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
+           for (var i = 0; i < _entityIDs.length; i++) {
+             var entity = context.graph().hasEntity(_entityIDs[i]);
+             if (!entity) continue;
+
+             if (i === 0) {
+               parents = context.graph().parentRelations(entity);
+             } else {
+               parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
              }
-           });
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             nextStep();
+             if (!parents.length) break;
            }
+
+           return parents;
          }
 
-         function fieldsTownHall() {
-           if (!isTownHallSelected()) return clickTownHall(); // reset pane, in case user happened to change it..
+         function getMemberships() {
+           var memberships = [];
+           var relations = getSharedParentRelations().slice(0, _maxMemberships);
+           var isMultiselect = _entityIDs.length > 1;
+           var i, relation, membership, index, member, indexedMember;
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // disallow scrolling
+           for (i = 0; i < relations.length; i++) {
+             relation = relations[i];
+             membership = {
+               relation: relation,
+               members: [],
+               hash: osmEntity.key(relation)
+             };
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
+             for (index = 0; index < relation.members.length; index++) {
+               member = relation.members[index];
 
-           var onClick = function onClick() {
-             continueTo(closeTownHall);
-           };
+               if (_entityIDs.indexOf(member.id) !== -1) {
+                 indexedMember = Object.assign({}, member, {
+                   index: index
+                 });
+                 membership.members.push(indexedMember);
+                 membership.hash += ',' + index.toString();
 
-           reveal('.entity-editor-pane .section-preset-fields', helpHtml('intro.navigation.fields_townhall'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.on('exit.intro', function () {
-             continueTo(clickTownHall);
-           });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(hallId)) {
-               continueTo(clickTownHall);
+                 if (!isMultiselect) {
+                   // For single selections, list one entry per membership per relation.
+                   // For multiselections, list one entry per relation.
+                   memberships.push(membership);
+                   membership = {
+                     relation: relation,
+                     members: [],
+                     hash: osmEntity.key(relation)
+                   };
+                 }
+               }
              }
-           });
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             nextStep();
+             if (membership.members.length) memberships.push(membership);
            }
-         }
 
-         function closeTownHall() {
-           if (!isTownHallSelected()) return clickTownHall();
-           var selector = '.entity-editor-pane button.close svg use';
-           var href = select(selector).attr('href') || '#iD-icon-close';
-           reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
-             button: icon(href, 'inline')
-           }));
-           context.on('exit.intro', function () {
-             continueTo(searchStreet);
-           });
-           context.history().on('change.intro', function () {
-             // update the close icon in the tooltip if the user edits something.
-             var selector = '.entity-editor-pane button.close svg use';
-             var href = select(selector).attr('href') || '#iD-icon-close';
-             reveal('.entity-editor-pane', helpHtml('intro.navigation.close_townhall', {
-               button: icon(href, 'inline')
-             }), {
-               duration: 0
+           memberships.forEach(function (membership) {
+             membership.domId = utilUniqueDomId('membership-' + membership.relation.id);
+             var roles = [];
+             membership.members.forEach(function (member) {
+               if (roles.indexOf(member.role) === -1) roles.push(member.role);
              });
+             membership.role = roles.length === 1 ? roles[0] : roles;
            });
+           return memberships;
+         }
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
+         function selectRelation(d3_event, d) {
+           d3_event.preventDefault(); // remove the hover-highlight styling
+
+           utilHighlightEntities([d.relation.id], false, context);
+           context.enter(modeSelect(context, [d.relation.id]));
          }
 
-         function searchStreet() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial'); // ensure spring street exists
+         function zoomToRelation(d3_event, d) {
+           d3_event.preventDefault();
+           var entity = context.entity(d.relation.id);
+           context.map().zoomToEase(entity); // highlight the relation in case it wasn't previously on-screen
 
-           var msec = transitionTime(springStreet, context.map().center());
+           utilHighlightEntities([d.relation.id], true, context);
+         }
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+         function changeRole(d3_event, d) {
+           if (d === 0) return; // called on newrow (shouldn't happen)
 
-           context.map().centerZoomEase(springStreet, 19, msec); // ..and user can see it
+           if (_inChange) return; // avoid accidental recursive call #5731
 
-           timeout(function () {
-             reveal('.search-header input', helpHtml('intro.navigation.search_street', {
-               name: _t('intro.graph.name.spring-street')
+           var newRole = context.cleanRelationRole(select(this).property('value'));
+           if (!newRole.trim() && typeof d.role !== 'string') return;
+           var membersToUpdate = d.members.filter(function (member) {
+             return member.role !== newRole;
+           });
+
+           if (membersToUpdate.length) {
+             _inChange = true;
+             context.perform(function actionChangeMemberRoles(graph) {
+               membersToUpdate.forEach(function (member) {
+                 var newMember = Object.assign({}, member, {
+                   role: newRole
+                 });
+                 delete newMember.index;
+                 graph = actionChangeMember(d.relation.id, newMember, member.index)(graph);
+               });
+               return graph;
+             }, _t('operations.change_role.annotation', {
+               n: membersToUpdate.length
              }));
-             context.container().select('.search-header input').on('keyup.intro', checkSearchResult);
-           }, msec + 100);
+             context.validator().validate();
+           }
+
+           _inChange = false;
          }
 
-         function checkSearchResult() {
-           var first = context.container().select('.feature-list-item:nth-child(0n+2)'); // skip "No Results" item
+         function addMembership(d, role) {
+           this.blur(); // avoid keeping focus on the button
 
-           var firstName = first.select('.entity-name');
-           var name = _t('intro.graph.name.spring-street');
+           _showBlank = false;
 
-           if (!firstName.empty() && firstName.html() === name) {
-             reveal(first.node(), helpHtml('intro.navigation.choose_street', {
-               name: name
-             }), {
-               duration: 300
-             });
-             context.on('exit.intro', function () {
-               continueTo(selectedStreet);
-             });
-             context.container().select('.search-header input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
+           function actionAddMembers(relationId, ids, role) {
+             return function (graph) {
+               for (var i in ids) {
+                 var member = {
+                   id: ids[i],
+                   type: graph.entity(ids[i]).type,
+                   role: role
+                 };
+                 graph = actionAddMember(relationId, member)(graph);
+               }
+
+               return graph;
+             };
            }
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.container().select('.search-header input').on('keydown.intro', null).on('keyup.intro', null);
-             nextStep();
+           if (d.relation) {
+             context.perform(actionAddMembers(d.relation.id, _entityIDs, role), _t('operations.add_member.annotation', {
+               n: _entityIDs.length
+             }));
+             context.validator().validate();
+           } else {
+             var relation = osmRelation();
+             context.perform(actionAddEntity(relation), actionAddMembers(relation.id, _entityIDs, role), _t('operations.add.annotation.relation')); // changing the mode also runs `validate`
+
+             context.enter(modeSelect(context, [relation.id]).newFeature(true));
            }
          }
 
-         function selectedStreet() {
-           if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-             return searchStreet();
-           }
+         function deleteMembership(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button
 
-           var onClick = function onClick() {
-             continueTo(editorStreet);
-           };
+           if (d === 0) return; // called on newrow (shouldn't happen)
+           // remove the hover-highlight styling
 
-           var entity = context.entity(springStreetEndId);
-           var box = pointBox(entity.loc, context);
-           box.height = 500;
-           reveal(box, helpHtml('intro.navigation.selected_street', {
-             name: _t('intro.graph.name.spring-street')
-           }), {
-             duration: 600,
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
+           utilHighlightEntities([d.relation.id], false, context);
+           var indexes = d.members.map(function (member) {
+             return member.index;
            });
-           timeout(function () {
-             context.map().on('move.intro drawn.intro', function () {
-               var entity = context.hasEntity(springStreetEndId);
-               if (!entity) return;
-               var box = pointBox(entity.loc, context);
-               box.height = 500;
-               reveal(box, helpHtml('intro.navigation.selected_street', {
-                 name: _t('intro.graph.name.spring-street')
-               }), {
-                 duration: 0,
-                 buttonText: _t.html('intro.ok'),
-                 buttonCallback: onClick
-               });
-             });
-           }, 600); // after reveal.
-
-           context.on('enter.intro', function (mode) {
-             if (!context.hasEntity(springStreetId)) {
-               return continueTo(searchStreet);
-             }
-
-             var ids = context.selectedIDs();
+           context.perform(actionDeleteMembers(d.relation.id, indexes), _t('operations.delete_member.annotation', {
+             n: _entityIDs.length
+           }));
+           context.validator().validate();
+         }
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== springStreetId) {
-               // keep Spring Street selected..
-               context.enter(modeSelect(context, [springStreetId]));
-             }
-           });
-           context.history().on('change.intro', function () {
-             if (!context.hasEntity(springStreetEndId) || !context.hasEntity(springStreetId)) {
-               timeout(function () {
-                 continueTo(searchStreet);
-               }, 300); // after any transition (e.g. if user deleted intersection)
-             }
-           });
+         function fetchNearbyRelations(q, callback) {
+           var newRelation = {
+             relation: null,
+             value: _t('inspector.new_relation'),
+             display: _t.html('inspector.new_relation')
+           };
+           var entityID = _entityIDs[0];
+           var result = [];
+           var graph = context.graph();
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+           function baseDisplayLabel(entity) {
+             var matched = _mainPresetIndex.match(entity, graph);
+             var presetName = matched && matched.name() || _t('inspector.relation');
+             var entityName = utilDisplayName(entity) || '';
+             return presetName + ' ' + entityName;
            }
-         }
 
-         function editorStreet() {
-           var selector = '.entity-editor-pane button.close svg use';
-           var href = select(selector).attr('href') || '#iD-icon-close';
-           reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
-             button: icon(href, 'inline'),
-             field1: onewayField.label(),
-             field2: maxspeedField.label()
-           }));
-           context.on('exit.intro', function () {
-             continueTo(play);
-           });
-           context.history().on('change.intro', function () {
-             // update the close icon in the tooltip if the user edits something.
-             var selector = '.entity-editor-pane button.close svg use';
-             var href = select(selector).attr('href') || '#iD-icon-close';
-             reveal('.entity-editor-pane', helpHtml('intro.navigation.street_different_fields') + '{br}' + helpHtml('intro.navigation.editor_street', {
-               button: icon(href, 'inline'),
-               field1: onewayField.label(),
-               field2: maxspeedField.label()
-             }), {
-               duration: 0
+           var explicitRelation = q && context.hasEntity(q.toLowerCase());
+
+           if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
+             // loaded relation is specified explicitly, only show that
+             result.push({
+               relation: explicitRelation,
+               value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
              });
-           });
+           } else {
+             context.history().intersects(context.map().extent()).forEach(function (entity) {
+               if (entity.type !== 'relation' || entity.id === entityID) return;
+               var value = baseDisplayLabel(entity);
+               if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) return;
+               result.push({
+                 relation: entity,
+                 value: value
+               });
+             });
+             result.sort(function (a, b) {
+               return osmRelation.creationOrder(a.relation, b.relation);
+             }); // Dedupe identical names by appending relation id - see #2891
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+             var dupeGroups = Object.values(utilArrayGroupBy(result, 'value')).filter(function (v) {
+               return v.length > 1;
+             });
+             dupeGroups.forEach(function (group) {
+               group.forEach(function (obj) {
+                 obj.value += ' ' + obj.relation.id;
+               });
+             });
            }
-         }
 
-         function play() {
-           dispatch$1.call('done');
-           reveal('.ideditor', helpHtml('intro.navigation.play', {
-             next: _t('intro.points.title')
-           }), {
-             tooltipBox: '.intro-nav-wrap .chapter-point',
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               reveal('.ideditor');
-             }
+           result.forEach(function (obj) {
+             obj.title = obj.value;
            });
+           result.unshift(newRelation);
+           callback(result);
          }
 
-         chapter.enter = function () {
-           dragMap();
-         };
-
-         chapter.exit = function () {
-           timeouts.forEach(window.clearTimeout);
-           context.on('enter.intro exit.intro', null);
-           context.map().on('move.intro drawn.intro', null);
-           context.history().on('change.intro', null);
-           context.container().select('.inspector-wrap').on('wheel.intro', null);
-           context.container().select('.search-header input').on('keydown.intro keyup.intro', null);
-         };
+         function renderDisclosureContent(selection) {
+           var memberships = getMemberships();
+           var list = selection.selectAll('.member-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'member-list').merge(list);
+           var items = list.selectAll('li.member-row-normal').data(memberships, function (d) {
+             return d.hash;
+           });
+           items.exit().each(unbind).remove(); // Enter
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+           var itemsEnter = items.enter().append('li').attr('class', 'member-row member-row-normal form-field'); // highlight the relation in the map while hovering on the list item
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+           itemsEnter.on('mouseover', function (d3_event, d) {
+             utilHighlightEntities([d.relation.id], true, context);
+           }).on('mouseout', function (d3_event, d) {
+             utilHighlightEntities([d.relation.id], false, context);
+           });
+           var labelEnter = itemsEnter.append('label').attr('class', 'field-label').attr('for', function (d) {
+             return d.domId;
+           });
+           var labelLink = labelEnter.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectRelation);
+           labelLink.append('span').attr('class', 'member-entity-type').text(function (d) {
+             var matched = _mainPresetIndex.match(d.relation, context.graph());
+             return matched && matched.name() || _t.html('inspector.relation');
+           });
+           labelLink.append('span').attr('class', 'member-entity-name').text(function (d) {
+             return utilDisplayName(d.relation);
+           });
+           labelEnter.append('button').attr('class', 'remove member-delete').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')).on('click', deleteMembership);
+           labelEnter.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToRelation);
+           var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+           wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
+             return d.domId;
+           }).property('type', 'text').property('value', function (d) {
+             return typeof d.role === 'string' ? d.role : '';
+           }).attr('title', function (d) {
+             return Array.isArray(d.role) ? d.role.filter(Boolean).join('\n') : d.role;
+           }).attr('placeholder', function (d) {
+             return Array.isArray(d.role) ? _t('inspector.multiple_roles') : _t('inspector.role');
+           }).classed('mixed', function (d) {
+             return Array.isArray(d.role);
+           }).call(utilNoAuto).on('blur', changeRole).on('change', changeRole);
 
-       function uiIntroPoint(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var timeouts = [];
-         var intersection = [-85.63279, 41.94394];
-         var building = [-85.632422, 41.944045];
-         var cafePreset = _mainPresetIndex.item('amenity/cafe');
-         var _pointID = null;
-         var chapter = {
-           title: 'intro.points.title'
-         };
+           if (taginfo) {
+             wrapEnter.each(bindTypeahead);
+           }
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+           var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+           newMembership.exit().remove(); // Enter
 
-         function addPoint() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var msec = transitionTime(intersection, context.map().center());
+           var newMembershipEnter = newMembership.enter().append('li').attr('class', 'member-row member-row-new form-field');
+           var newLabelEnter = newMembershipEnter.append('label').attr('class', 'field-label');
+           newLabelEnter.append('input').attr('placeholder', _t('inspector.choose_relation')).attr('type', 'text').attr('class', 'member-entity-input').call(utilNoAuto);
+           newLabelEnter.append('button').attr('class', 'remove member-delete').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')).on('click', function () {
+             list.selectAll('.member-row-new').remove();
+           });
+           var newWrapEnter = newMembershipEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
+           newWrapEnter.append('input').attr('class', 'member-role').property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto); // Update
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+           newMembership = newMembership.merge(newMembershipEnter);
+           newMembership.selectAll('.member-entity-input').on('blur', cancelEntity) // if it wasn't accepted normally, cancel it
+           .call(nearbyCombo.on('accept', acceptEntity).on('cancel', cancelEntity)); // Container for the Add button
 
-           context.map().centerZoomEase(intersection, 19, msec);
-           timeout(function () {
-             var tooltip = reveal('button.add-point', helpHtml('intro.points.points_info') + '{br}' + helpHtml('intro.points.add_point'));
-             _pointID = null;
-             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-points');
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'add-point') return;
-               continueTo(placePoint);
-             });
-           }, msec + 100);
+           var addRow = selection.selectAll('.add-row').data([0]); // enter
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+           var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
+           var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation').attr('aria-label', _t('inspector.add_to_relation'));
+           addRelationButton.call(svgIcon('#iD-icon-plus', 'light'));
+           addRelationButton.call(uiTooltip().title(_t.html('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
+           addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
-         function placePoint() {
-           if (context.mode().id !== 'add-point') {
-             return chapter.restart();
-           }
+           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+           // update
 
-           var pointBox = pad(building, 150, context);
-           var textId = context.lastPointerType() === 'mouse' ? 'place_point' : 'place_point_touch';
-           reveal(pointBox, helpHtml('intro.points.' + textId));
-           context.map().on('move.intro drawn.intro', function () {
-             pointBox = pad(building, 150, context);
-             reveal(pointBox, helpHtml('intro.points.' + textId), {
-               duration: 0
-             });
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'select') return chapter.restart();
-             _pointID = context.mode().selectedIDs()[0];
-             continueTo(searchPreset);
+           addRow = addRow.merge(addRowEnter);
+           addRow.select('.add-relation').on('click', function () {
+             _showBlank = true;
+             section.reRender();
+             list.selectAll('.member-entity-input').node().focus();
            });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+           function acceptEntity(d) {
+             if (!d) {
+               cancelEntity();
+               return;
+             } // remove hover-higlighting
+
+
+             if (d.relation) utilHighlightEntities([d.relation.id], false, context);
+             var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
+             addMembership(d, role);
            }
-         }
 
-         function searchPreset() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return addPoint();
-           } // disallow scrolling
+           function cancelEntity() {
+             var input = newMembership.selectAll('.member-entity-input');
+             input.property('value', ''); // remove hover-higlighting
 
+             context.surface().selectAll('.highlighted').classed('highlighted', false);
+           }
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-           context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
-           reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
-             preset: cafePreset.name()
-           }));
-           context.on('enter.intro', function (mode) {
-             if (!_pointID || !context.hasEntity(_pointID)) {
-               return continueTo(addPoint);
-             }
+           function bindTypeahead(d) {
+             var row = select(this);
+             var role = row.selectAll('input.member-role');
+             var origValue = role.property('value');
 
-             var ids = context.selectedIDs();
+             function sort(value, data) {
+               var sameletter = [];
+               var other = [];
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _pointID) {
-               // keep the user's point selected..
-               context.enter(modeSelect(context, [_pointID])); // disallow scrolling
+               for (var i = 0; i < data.length; i++) {
+                 if (data[i].value.substring(0, value.length) === value) {
+                   sameletter.push(data[i]);
+                 } else {
+                   other.push(data[i]);
+                 }
+               }
 
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
-               reveal('.preset-search-input', helpHtml('intro.points.search_cafe', {
-                 preset: cafePreset.name()
-               }));
-               context.history().on('change.intro', null);
+               return sameletter.concat(other);
              }
-           });
-
-           function checkPresetSearch() {
-             var first = context.container().select('.preset-list-item:first-child');
 
-             if (first.classed('preset-amenity-cafe')) {
-               context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
-               reveal(first.select('.preset-list-button').node(), helpHtml('intro.points.choose_cafe', {
-                 preset: cafePreset.name()
-               }), {
-                 duration: 300
-               });
-               context.history().on('change.intro', function () {
-                 continueTo(aboutFeatureEditor);
+             role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
+               var rtype = d.relation.tags.type;
+               taginfo.roles({
+                 debounce: true,
+                 rtype: rtype || '',
+                 geometry: context.graph().geometry(_entityIDs[0]),
+                 query: role
+               }, function (err, data) {
+                 if (!err) callback(sort(role, data));
                });
-             }
+             }).on('cancel', function () {
+               role.property('value', origValue);
+             }));
            }
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-             nextStep();
+           function unbind() {
+             var row = select(this);
+             row.selectAll('input.member-role').call(uiCombobox.off, context);
            }
          }
 
-         function aboutFeatureEditor() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return addPoint();
-           }
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _showBlank = false;
+           return section;
+         };
 
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.points.feature_editor'), {
-               tooltipClass: 'intro-points-describe',
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: function buttonCallback() {
-                 continueTo(addName);
-               }
-             });
-           }, 400);
-           context.on('exit.intro', function () {
-             // if user leaves select mode here, just continue with the tutorial.
-             continueTo(reselectPoint);
-           });
+         return section;
+       }
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
+       function uiSectionSelectionList(context) {
+         var _selectedIDs = [];
+         var section = uiSection('selected-features', context).shouldDisplay(function () {
+           return _selectedIDs.length > 1;
+         }).label(function () {
+           return _t.html('inspector.title_count', {
+             title: {
+               html: _t.html('inspector.features')
+             },
+             count: _selectedIDs.length
+           });
+         }).disclosureContent(renderDisclosureContent);
+         context.history().on('change.selectionList', function (difference) {
+           if (difference) {
+             section.reRender();
            }
-         }
+         });
 
-         function addName() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return addPoint();
-           } // reset pane, in case user happened to change it..
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _selectedIDs;
+           _selectedIDs = val;
+           return section;
+         };
 
+         function selectEntity(d3_event, entity) {
+           context.enter(modeSelect(context, [entity.id]));
+         }
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-           var addNameString = helpHtml('intro.points.fields_info') + '{br}' + helpHtml('intro.points.add_name');
-           timeout(function () {
-             // It's possible for the user to add a name in a previous step..
-             // If so, don't tell them to add the name in this step.
-             // Give them an OK button instead.
-             var entity = context.entity(_pointID);
+         function deselectEntity(d3_event, entity) {
+           var selectedIDs = _selectedIDs.slice();
 
-             if (entity.tags.name) {
-               var tooltip = reveal('.entity-editor-pane', addNameString, {
-                 tooltipClass: 'intro-points-describe',
-                 buttonText: _t.html('intro.ok'),
-                 buttonCallback: function buttonCallback() {
-                   continueTo(addCloseEditor);
-                 }
-               });
-               tooltip.select('.instruction').style('display', 'none');
-             } else {
-               reveal('.entity-editor-pane', addNameString, {
-                 tooltipClass: 'intro-points-describe'
-               });
-             }
-           }, 400);
-           context.history().on('change.intro', function () {
-             continueTo(addCloseEditor);
-           });
-           context.on('exit.intro', function () {
-             // if user leaves select mode here, just continue with the tutorial.
-             continueTo(reselectPoint);
-           });
+           var index = selectedIDs.indexOf(entity.id);
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+           if (index > -1) {
+             selectedIDs.splice(index, 1);
+             context.enter(modeSelect(context, selectedIDs));
            }
          }
 
-         function addCloseEditor() {
-           // reset pane, in case user happened to change it..
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-           var selector = '.entity-editor-pane button.close svg use';
-           var href = select(selector).attr('href') || '#iD-icon-close';
-           context.on('exit.intro', function () {
-             continueTo(reselectPoint);
-           });
-           reveal('.entity-editor-pane', helpHtml('intro.points.add_close', {
-             button: icon(href, 'inline')
-           }));
-
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+         function renderDisclosureContent(selection) {
+           var list = selection.selectAll('.feature-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'feature-list').merge(list);
 
-         function reselectPoint() {
-           if (!_pointID) return chapter.restart();
-           var entity = context.hasEntity(_pointID);
-           if (!entity) return chapter.restart(); // make sure it's still a cafe, in case user somehow changed it..
+           var entities = _selectedIDs.map(function (id) {
+             return context.hasEntity(id);
+           }).filter(Boolean);
 
-           var oldPreset = _mainPresetIndex.match(entity, context.graph());
-           context.replace(actionChangePreset(_pointID, oldPreset, cafePreset));
-           context.enter(modeBrowse(context));
-           var msec = transitionTime(entity.loc, context.map().center());
+           var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
+           items.exit().remove(); // Enter
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
+           var enter = items.enter().append('li').attr('class', 'feature-list-item').each(function (d) {
+             select(this).on('mouseover', function () {
+               utilHighlightEntities([d.id], true, context);
+             }).on('mouseout', function () {
+               utilHighlightEntities([d.id], false, context);
              });
-           }
+           });
+           var label = enter.append('button').attr('class', 'label').on('click', selectEntity);
+           label.append('span').attr('class', 'entity-geom-icon').call(svgIcon('', 'pre-text'));
+           label.append('span').attr('class', 'entity-type');
+           label.append('span').attr('class', 'entity-name');
+           enter.append('button').attr('class', 'close').attr('title', _t('icons.deselect')).on('click', deselectEntity).call(svgIcon('#iD-icon-close')); // Update
 
-           context.map().centerEase(entity.loc, msec);
-           timeout(function () {
-             var box = pointBox(entity.loc, context);
-             reveal(box, helpHtml('intro.points.reselect'), {
-               duration: 600
-             });
-             timeout(function () {
-               context.map().on('move.intro drawn.intro', function () {
-                 var entity = context.hasEntity(_pointID);
-                 if (!entity) return chapter.restart();
-                 var box = pointBox(entity.loc, context);
-                 reveal(box, helpHtml('intro.points.reselect'), {
-                   duration: 0
-                 });
-               });
-             }, 600); // after reveal..
+           items = items.merge(enter);
+           items.selectAll('.entity-geom-icon use').attr('href', function () {
+             var entity = this.parentNode.parentNode.__data__;
+             return '#iD-icon-' + entity.geometry(context.graph());
+           });
+           items.selectAll('.entity-type').text(function (entity) {
+             return _mainPresetIndex.match(entity, context.graph()).name();
+           });
+           items.selectAll('.entity-name').text(function (d) {
+             // fetch latest entity
+             var entity = context.entity(d.id);
+             return utilDisplayName(entity);
+           });
+         }
 
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'select') return;
-               continueTo(updatePoint);
-             });
-           }, msec + 100);
+         return section;
+       }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+       function uiEntityEditor(context) {
+         var dispatch = dispatch$8('choose');
+         var _state = 'select';
+         var _coalesceChanges = false;
+         var _modified = false;
 
-         function updatePoint() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return continueTo(reselectPoint);
-           } // reset pane, in case user happened to untag the point..
+         var _base;
 
+         var _entityIDs;
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-           context.on('exit.intro', function () {
-             continueTo(reselectPoint);
-           });
-           context.history().on('change.intro', function () {
-             continueTo(updateCloseEditor);
-           });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.points.update'), {
-               tooltipClass: 'intro-points-describe'
-             });
-           }, 400);
+         var _activePresets = [];
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+         var _newFeature;
 
-         function updateCloseEditor() {
-           if (context.mode().id !== 'select' || !_pointID || !context.hasEntity(_pointID)) {
-             return continueTo(reselectPoint);
-           } // reset pane, in case user happened to change it..
+         var _sections;
 
+         function entityEditor(selection) {
+           var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-           context.on('exit.intro', function () {
-             continueTo(rightClickPoint);
-           });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.points.update_close', {
-               button: icon('#iD-icon-close', 'inline')
-             }));
-           }, 500);
+           var header = selection.selectAll('.header').data([0]); // Enter
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+           var direction = _mainLocalizer.textDirection() === 'rtl' ? 'forward' : 'backward';
+           headerEnter.append('button').attr('class', 'preset-reset preset-choose').attr('title', _t("icons.".concat(direction))).call(svgIcon("#iD-icon-".concat(direction)));
+           headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+             context.enter(modeBrowse(context));
+           }).call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
+           headerEnter.append('h2'); // Update
 
-         function rightClickPoint() {
-           if (!_pointID) return chapter.restart();
-           var entity = context.hasEntity(_pointID);
-           if (!entity) return chapter.restart();
-           context.enter(modeBrowse(context));
-           var box = pointBox(entity.loc, context);
-           var textId = context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch';
-           reveal(box, helpHtml('intro.points.' + textId), {
-             duration: 600
-           });
-           timeout(function () {
-             context.map().on('move.intro', function () {
-               var entity = context.hasEntity(_pointID);
-               if (!entity) return chapter.restart();
-               var box = pointBox(entity.loc, context);
-               reveal(box, helpHtml('intro.points.' + textId), {
-                 duration: 0
-               });
-             });
-           }, 600); // after reveal
+           header = header.merge(headerEnter);
+           header.selectAll('h2').html(_entityIDs.length === 1 ? _t.html('inspector.edit') : _t.html('inspector.edit_features'));
+           header.selectAll('.preset-reset').on('click', function () {
+             dispatch.call('choose', this, _activePresets);
+           }); // Body
 
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'select') return;
-             var ids = context.selectedIDs();
-             if (ids.length !== 1 || ids[0] !== _pointID) return;
-             timeout(function () {
-               var node = selectMenuItem(context, 'delete').node();
-               if (!node) return;
-               continueTo(enterDelete);
-             }, 50); // after menu visible
-           });
+           var body = selection.selectAll('.inspector-body').data([0]); // Enter
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro', null);
-             nextStep();
-           }
-         }
+           var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
 
-         function enterDelete() {
-           if (!_pointID) return chapter.restart();
-           var entity = context.hasEntity(_pointID);
-           if (!entity) return chapter.restart();
-           var node = selectMenuItem(context, 'delete').node();
+           body = body.merge(bodyEnter);
 
-           if (!node) {
-             return continueTo(rightClickPoint);
+           if (!_sections) {
+             _sections = [uiSectionSelectionList(context), uiSectionFeatureType(context).on('choose', function (presets) {
+               dispatch.call('choose', this, presets);
+             }), uiSectionEntityIssues(context), uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags), uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags), uiSectionRawMemberEditor(context), uiSectionRawMembershipEditor(context)];
            }
 
-           reveal('.edit-menu', helpHtml('intro.points.delete'), {
-             padding: 50
-           });
-           timeout(function () {
-             context.map().on('move.intro', function () {
-               reveal('.edit-menu', helpHtml('intro.points.delete'), {
-                 duration: 0,
-                 padding: 50
-               });
-             });
-           }, 300); // after menu visible
+           _sections.forEach(function (section) {
+             if (section.entityIDs) {
+               section.entityIDs(_entityIDs);
+             }
 
-           context.on('exit.intro', function () {
-             if (!_pointID) return chapter.restart();
-             var entity = context.hasEntity(_pointID);
-             if (entity) return continueTo(rightClickPoint); // point still exists
-           });
-           context.history().on('change.intro', function (changed) {
-             if (changed.deleted().length) {
-               continueTo(undo);
+             if (section.presets) {
+               section.presets(_activePresets);
              }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro', null);
-             context.history().on('change.intro', null);
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+             if (section.tags) {
+               section.tags(combinedTags);
+             }
 
-         function undo() {
-           context.history().on('change.intro', function () {
-             continueTo(play);
+             if (section.state) {
+               section.state(_state);
+             }
+
+             body.call(section.render);
            });
-           reveal('.top-toolbar button.undo-button', helpHtml('intro.points.undo'));
 
-           function continueTo(nextStep) {
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+           context.history().on('change.entity-editor', historyChanged);
 
-         function play() {
-           dispatch$1.call('done');
-           reveal('.ideditor', helpHtml('intro.points.play', {
-             next: _t('intro.areas.title')
-           }), {
-             tooltipBox: '.intro-nav-wrap .chapter-area',
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               reveal('.ideditor');
+           function historyChanged(difference) {
+             if (selection.selectAll('.entity-editor').empty()) return;
+             if (_state === 'hide') return;
+             var significant = !difference || difference.didChange.properties || difference.didChange.addition || difference.didChange.deletion;
+             if (!significant) return;
+             _entityIDs = _entityIDs.filter(context.hasEntity);
+             if (!_entityIDs.length) return;
+             var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
+             loadActivePresets();
+             var graph = context.graph();
+             entityEditor.modified(_base !== graph);
+             entityEditor(selection);
+
+             if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
+               // flash the button to indicate the preset changed
+               context.container().selectAll('.entity-editor button.preset-reset .label').style('background-color', '#fff').transition().duration(750).style('background-color', null);
              }
-           });
-         }
+           }
+         } // Tag changes that fire on input can all get coalesced into a single
+         // history operation when the user leaves the field.  #2342
+         // Use explicit entityIDs in case the selection changes before the event is fired.
 
-         chapter.enter = function () {
-           addPoint();
-         };
 
-         chapter.exit = function () {
-           timeouts.forEach(window.clearTimeout);
-           context.on('enter.intro exit.intro', null);
-           context.map().on('move.intro drawn.intro', null);
-           context.history().on('change.intro', null);
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-         };
+         function changeTags(entityIDs, changed, onInput) {
+           var actions = [];
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
+           for (var i in entityIDs) {
+             var entityID = entityIDs[i];
+             var entity = context.entity(entityID);
+             var tags = Object.assign({}, entity.tags); // shallow copy
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+             for (var k in changed) {
+               if (!k) continue;
+               var v = changed[k];
 
-       function uiIntroArea(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var playground = [-85.63552, 41.94159];
-         var playgroundPreset = _mainPresetIndex.item('leisure/playground');
-         var nameField = _mainPresetIndex.field('name');
-         var descriptionField = _mainPresetIndex.field('description');
-         var timeouts = [];
+               if (_typeof(v) === 'object') {
+                 // a "key only" tag change
+                 tags[k] = tags[v.oldKey];
+               } else if (v !== undefined || tags.hasOwnProperty(k)) {
+                 tags[k] = v;
+               }
+             }
 
-         var _areaID;
+             if (!onInput) {
+               tags = utilCleanTags(tags);
+             }
 
-         var chapter = {
-           title: 'intro.areas.title'
-         };
+             if (!fastDeepEqual(entity.tags, tags)) {
+               actions.push(actionChangeTags(entityID, tags));
+             }
+           }
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+           if (actions.length) {
+             var combinedAction = function combinedAction(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
+               });
+               return graph;
+             };
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+             var annotation = _t('operations.change_tags.annotation');
 
-         function revealPlayground(center, text, options) {
-           var padding = 180 * Math.pow(2, context.map().zoom() - 19.5);
-           var box = pad(center, padding, context);
-           reveal(box, text, options);
-         }
+             if (_coalesceChanges) {
+               context.overwrite(combinedAction, annotation);
+             } else {
+               context.perform(combinedAction, annotation);
+               _coalesceChanges = !!onInput;
+             }
+           } // if leaving field (blur event), rerun validation
 
-         function addArea() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           _areaID = null;
-           var msec = transitionTime(playground, context.map().center());
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
+           if (!onInput) {
+             context.validator().validate();
            }
+         }
 
-           context.map().centerZoomEase(playground, 19, msec);
-           timeout(function () {
-             var tooltip = reveal('button.add-area', helpHtml('intro.areas.add_playground'));
-             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-areas');
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'add-area') return;
-               continueTo(startPlayground);
-             });
-           }, msec + 100);
+         function revertTags(keys) {
+           var actions = [];
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+           for (var i in _entityIDs) {
+             var entityID = _entityIDs[i];
+             var original = context.graph().base().entities[entityID];
+             var changed = {};
 
-         function startPlayground() {
-           if (context.mode().id !== 'add-area') {
-             return chapter.restart();
-           }
+             for (var j in keys) {
+               var key = keys[j];
+               changed[key] = original ? original.tags[key] : undefined;
+             }
 
-           _areaID = null;
-           context.map().zoomEase(19.5, 500);
-           timeout(function () {
-             var textId = context.lastPointerType() === 'mouse' ? 'starting_node_click' : 'starting_node_tap';
-             var startDrawString = helpHtml('intro.areas.start_playground') + helpHtml('intro.areas.' + textId);
-             revealPlayground(playground, startDrawString, {
-               duration: 250
-             });
-             timeout(function () {
-               context.map().on('move.intro drawn.intro', function () {
-                 revealPlayground(playground, startDrawString, {
-                   duration: 0
-                 });
-               });
-               context.on('enter.intro', function (mode) {
-                 if (mode.id !== 'draw-area') return chapter.restart();
-                 continueTo(continuePlayground);
-               });
-             }, 250); // after reveal
-           }, 550); // after easing
+             var entity = context.entity(entityID);
+             var tags = Object.assign({}, entity.tags); // shallow copy
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+             for (var k in changed) {
+               if (!k) continue;
+               var v = changed[k];
 
-         function continuePlayground() {
-           if (context.mode().id !== 'draw-area') {
-             return chapter.restart();
+               if (v !== undefined || tags.hasOwnProperty(k)) {
+                 tags[k] = v;
+               }
+             }
+
+             tags = utilCleanTags(tags);
+
+             if (!fastDeepEqual(entity.tags, tags)) {
+               actions.push(actionChangeTags(entityID, tags));
+             }
            }
 
-           _areaID = null;
-           revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
-             duration: 250
-           });
-           timeout(function () {
-             context.map().on('move.intro drawn.intro', function () {
-               revealPlayground(playground, helpHtml('intro.areas.continue_playground'), {
-                 duration: 0
+           if (actions.length) {
+             var combinedAction = function combinedAction(graph) {
+               actions.forEach(function (action) {
+                 graph = action(graph);
                });
-             });
-           }, 250); // after reveal
+               return graph;
+             };
 
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'draw-area') {
-               var entity = context.hasEntity(context.selectedIDs()[0]);
+             var annotation = _t('operations.change_tags.annotation');
 
-               if (entity && entity.nodes.length >= 6) {
-                 return continueTo(finishPlayground);
-               } else {
-                 return;
-               }
-             } else if (mode.id === 'select') {
-               _areaID = context.selectedIDs()[0];
-               return continueTo(searchPresets);
+             if (_coalesceChanges) {
+               context.overwrite(combinedAction, annotation);
              } else {
-               return chapter.restart();
+               context.perform(combinedAction, annotation);
+               _coalesceChanges = false;
              }
-           });
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
            }
+
+           context.validator().validate();
          }
 
-         function finishPlayground() {
-           if (context.mode().id !== 'draw-area') {
-             return chapter.restart();
+         entityEditor.modified = function (val) {
+           if (!arguments.length) return _modified;
+           _modified = val;
+           return entityEditor;
+         };
+
+         entityEditor.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           return entityEditor;
+         };
+
+         entityEditor.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs; // always reload these even if the entityIDs are unchanged, since we
+           // could be reselecting after something like dragging a node
+
+           _base = context.graph();
+           _coalesceChanges = false;
+           if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
+
+           _entityIDs = val;
+           loadActivePresets(true);
+           return entityEditor.modified(false);
+         };
+
+         entityEditor.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return entityEditor;
+         };
+
+         function loadActivePresets(isForNewSelection) {
+           var graph = context.graph();
+           var counts = {};
+
+           for (var i in _entityIDs) {
+             var entity = graph.hasEntity(_entityIDs[i]);
+             if (!entity) return;
+             var match = _mainPresetIndex.match(entity, graph);
+             if (!counts[match.id]) counts[match.id] = 0;
+             counts[match.id] += 1;
            }
 
-           _areaID = null;
-           var finishString = helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.areas.finish_playground');
-           revealPlayground(playground, finishString, {
-             duration: 250
+           var matches = Object.keys(counts).sort(function (p1, p2) {
+             return counts[p2] - counts[p1];
+           }).map(function (pID) {
+             return _mainPresetIndex.item(pID);
            });
-           timeout(function () {
-             context.map().on('move.intro drawn.intro', function () {
-               revealPlayground(playground, finishString, {
-                 duration: 0
-               });
-             });
-           }, 250); // after reveal
 
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'draw-area') {
-               return;
-             } else if (mode.id === 'select') {
-               _areaID = context.selectedIDs()[0];
-               return continueTo(searchPresets);
-             } else {
-               return chapter.restart();
-             }
-           });
+           if (!isForNewSelection) {
+             // A "weak" preset doesn't set any tags. (e.g. "Address")
+             var weakPreset = _activePresets.length === 1 && !_activePresets[0].isFallback() && Object.keys(_activePresets[0].addTags || {}).length === 0; // Don't replace a weak preset with a fallback preset (e.g. "Point")
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+             if (weakPreset && matches.length === 1 && matches[0].isFallback()) return;
            }
+
+           entityEditor.presets(matches);
          }
 
-         function searchPresets() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
+         entityEditor.presets = function (val) {
+           if (!arguments.length) return _activePresets; // don't reload the same preset
+
+           if (!utilArrayIdentical(val, _activePresets)) {
+             _activePresets = val;
            }
 
-           var ids = context.selectedIDs();
+           return entityEditor;
+         };
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             context.enter(modeSelect(context, [_areaID]));
-           } // disallow scrolling
+         return utilRebind(entityEditor, dispatch, 'on');
+       }
 
+       var sexagesimal = {exports: {}};
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-           timeout(function () {
-             // reset pane, in case user somehow happened to change it..
-             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-             context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
-             reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
-               preset: playgroundPreset.name()
-             }));
-           }, 400); // after preset list pane visible..
+       sexagesimal.exports = element;
+       var pair_1 = sexagesimal.exports.pair = pair;
+       sexagesimal.exports.format = format;
+       sexagesimal.exports.formatPair = formatPair;
+       sexagesimal.exports.coordToDMS = coordToDMS;
 
-           context.on('enter.intro', function (mode) {
-             if (!_areaID || !context.hasEntity(_areaID)) {
-               return continueTo(addArea);
-             }
+       function element(input, dims) {
+         var result = search(input, dims);
+         return result === null ? null : result.val;
+       }
 
-             var ids = context.selectedIDs();
+       function formatPair(input) {
+         return format(input.lat, 'lat') + ' ' + format(input.lon, 'lon');
+       } // Is 0 North or South?
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _areaID) {
-               // keep the user's area selected..
-               context.enter(modeSelect(context, [_areaID])); // reset pane, in case user somehow happened to change it..
 
-               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
+       function format(input, dim) {
+         var dms = coordToDMS(input, dim);
+         return dms.whole + '° ' + (dms.minutes ? dms.minutes + '\' ' : '') + (dms.seconds ? dms.seconds + '" ' : '') + dms.dir;
+       }
 
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
-               reveal('.preset-search-input', helpHtml('intro.areas.search_playground', {
-                 preset: playgroundPreset.name()
-               }));
-               context.history().on('change.intro', null);
-             }
-           });
+       function coordToDMS(input, dim) {
+         var dirs = {
+           lat: ['N', 'S'],
+           lon: ['E', 'W']
+         }[dim] || '';
+         var dir = dirs[input >= 0 ? 0 : 1];
+         var abs = Math.abs(input);
+         var whole = Math.floor(abs);
+         var fraction = abs - whole;
+         var fractionMinutes = fraction * 60;
+         var minutes = Math.floor(fractionMinutes);
+         var seconds = Math.floor((fractionMinutes - minutes) * 60);
+         return {
+           whole: whole,
+           minutes: minutes,
+           seconds: seconds,
+           dir: dir
+         };
+       }
 
-           function checkPresetSearch() {
-             var first = context.container().select('.preset-list-item:first-child');
+       function search(input, dims) {
+         if (!dims) dims = 'NSEW';
+         if (typeof input !== 'string') return null;
+         input = input.toUpperCase();
+         var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
+         var m = input.match(regex);
+         if (!m) return null; // no match
 
-             if (first.classed('preset-leisure-playground')) {
-               reveal(first.select('.preset-list-button').node(), helpHtml('intro.areas.choose_playground', {
-                 preset: playgroundPreset.name()
-               }), {
-                 duration: 300
-               });
-               context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
-               context.history().on('change.intro', function () {
-                 continueTo(clickAddField);
-               });
-             }
-           }
+         var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
 
-           function continueTo(nextStep) {
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-             nextStep();
-           }
-         }
+         var dim;
 
-         function clickAddField() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
-           }
+         if (m[1] && m[5]) {
+           // if matched both..
+           dim = m[1]; // keep leading
 
-           var ids = context.selectedIDs();
+           matched = matched.slice(0, -1); // remove trailing dimension from match
+         } else {
+           dim = m[1] || m[5];
+         } // if unrecognized dimension
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
-           }
 
-           if (!context.container().select('.form-field-description').empty()) {
-             return continueTo(describePlayground);
-           } // disallow scrolling
+         if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
 
+         var deg = m[2] ? parseFloat(m[2]) : 0;
+         var min = m[3] ? parseFloat(m[3]) / 60 : 0;
+         var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
+         var sign = deg < 0 ? -1 : 1;
+         if (dim === 'S' || dim === 'W') sign *= -1;
+         return {
+           val: (Math.abs(deg) + min + sec) * sign,
+           dim: dim,
+           matched: matched,
+           remain: input.slice(matched.length)
+         };
+       }
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-           timeout(function () {
-             // reset pane, in case user somehow happened to change it..
-             context.container().select('.inspector-wrap .panewrap').style('right', '0%'); // It's possible for the user to add a description in a previous step..
-             // If they did this already, just continue to next step.
+       function pair(input, dims) {
+         input = input.trim();
+         var one = search(input, dims);
+         if (!one) return null;
+         input = one.remain.trim();
+         var two = search(input, dims);
+         if (!two || two.remain) return null;
 
-             var entity = context.entity(_areaID);
+         if (one.dim) {
+           return swapdim(one.val, two.val, one.dim);
+         } else {
+           return [one.val, two.val];
+         }
+       }
 
-             if (entity.tags.description) {
-               return continueTo(play);
-             } // scroll "Add field" into view
+       function swapdim(a, b, dim) {
+         if (dim === 'N' || dim === 'S') return [a, b];
+         if (dim === 'W' || dim === 'E') return [b, a];
+       }
+
+       function uiFeatureList(context) {
+         var _geocodeResults;
 
+         function featureList(selection) {
+           var header = selection.append('div').attr('class', 'header fillL');
+           header.append('h2').call(_t.append('inspector.feature_list'));
+           var searchWrap = selection.append('div').attr('class', 'search-header');
+           searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+           var search = searchWrap.append('input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keypress', keypress).on('keydown', keydown).on('input', inputevent);
+           var listWrap = selection.append('div').attr('class', 'inspector-body');
+           var list = listWrap.append('div').attr('class', 'feature-list');
+           context.on('exit.feature-list', clearSearch);
+           context.map().on('drawn.feature-list', mapDrawn);
+           context.keybinding().on(uiCmd('⌘F'), focusSearch);
 
-             var box = context.container().select('.more-fields').node().getBoundingClientRect();
+           function focusSearch(d3_event) {
+             var mode = context.mode() && context.mode().id;
+             if (mode !== 'browse') return;
+             d3_event.preventDefault();
+             search.node().focus();
+           }
 
-             if (box.top > 300) {
-               var pane = context.container().select('.entity-editor-pane .inspector-body');
-               var start = pane.node().scrollTop;
-               var end = start + (box.top - 300);
-               pane.transition().duration(250).tween('scroll.inspector', function () {
-                 var node = this;
-                 var i = d3_interpolateNumber(start, end);
-                 return function (t) {
-                   node.scrollTop = i(t);
-                 };
-               });
+           function keydown(d3_event) {
+             if (d3_event.keyCode === 27) {
+               // escape
+               search.node().blur();
              }
+           }
 
-             timeout(function () {
-               reveal('.more-fields .combobox-input', helpHtml('intro.areas.add_field', {
-                 name: nameField.label(),
-                 description: descriptionField.label()
-               }), {
-                 duration: 300
-               });
-               context.container().select('.more-fields .combobox-input').on('click.intro', function () {
-                 // Watch for the combobox to appear...
-                 var watcher;
-                 watcher = window.setInterval(function () {
-                   if (!context.container().select('div.combobox').empty()) {
-                     window.clearInterval(watcher);
-                     continueTo(chooseDescriptionField);
-                   }
-                 }, 300);
-               });
-             }, 300); // after "Add Field" visible
-           }, 400); // after editor pane visible
-
-           context.on('exit.intro', function () {
-             return continueTo(searchPresets);
-           });
+           function keypress(d3_event) {
+             var q = search.property('value'),
+                 items = list.selectAll('.feature-list-item');
 
-           function continueTo(nextStep) {
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.container().select('.more-fields .combobox-input').on('click.intro', null);
-             context.on('exit.intro', null);
-             nextStep();
+             if (d3_event.keyCode === 13 && // ↩ Return
+             q.length && items.size()) {
+               click(d3_event, items.datum());
+             }
            }
-         }
 
-         function chooseDescriptionField() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
+           function inputevent() {
+             _geocodeResults = undefined;
+             drawList();
            }
 
-           var ids = context.selectedIDs();
+           function clearSearch() {
+             search.property('value', '');
+             drawList();
+           }
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
+           function mapDrawn(e) {
+             if (e.full) {
+               drawList();
+             }
            }
 
-           if (!context.container().select('.form-field-description').empty()) {
-             return continueTo(describePlayground);
-           } // Make sure combobox is ready..
+           function features() {
+             var result = [];
+             var graph = context.graph();
+             var visibleCenter = context.map().extent().center();
+             var q = search.property('value').toLowerCase();
+             if (!q) return result;
+             var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
 
+             if (locationMatch) {
+               var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
+               result.push({
+                 id: -1,
+                 geometry: 'point',
+                 type: _t('inspector.location'),
+                 name: dmsCoordinatePair([loc[1], loc[0]]),
+                 location: loc
+               });
+             } // A location search takes priority over an ID search
 
-           if (context.container().select('div.combobox').empty()) {
-             return continueTo(clickAddField);
-           } // Watch for the combobox to go away..
 
+             var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
 
-           var watcher;
-           watcher = window.setInterval(function () {
-             if (context.container().select('div.combobox').empty()) {
-               window.clearInterval(watcher);
-               timeout(function () {
-                 if (context.container().select('.form-field-description').empty()) {
-                   continueTo(retryChooseDescription);
-                 } else {
-                   continueTo(describePlayground);
-                 }
-               }, 300); // after description field added.
+             if (idMatch) {
+               var elemType = idMatch[1].charAt(0);
+               var elemId = idMatch[2];
+               result.push({
+                 id: elemType + elemId,
+                 geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
+                 type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
+                 name: elemId
+               });
              }
-           }, 300);
-           reveal('div.combobox', helpHtml('intro.areas.choose_field', {
-             field: descriptionField.label()
-           }), {
-             duration: 300
-           });
-           context.on('exit.intro', function () {
-             return continueTo(searchPresets);
-           });
 
-           function continueTo(nextStep) {
-             if (watcher) window.clearInterval(watcher);
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+             var allEntities = graph.entities;
+             var localResults = [];
 
-         function describePlayground() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
-           }
+             for (var id in allEntities) {
+               var entity = allEntities[id];
+               if (!entity) continue;
+               var name = utilDisplayName(entity) || '';
+               if (name.toLowerCase().indexOf(q) < 0) continue;
+               var matched = _mainPresetIndex.match(entity, graph);
+               var type = matched && matched.name() || utilDisplayType(entity.id);
+               var extent = entity.extent(graph);
+               var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
+               localResults.push({
+                 id: entity.id,
+                 entity: entity,
+                 geometry: entity.geometry(graph),
+                 type: type,
+                 name: name,
+                 distance: distance
+               });
+               if (localResults.length > 100) break;
+             }
 
-           var ids = context.selectedIDs();
+             localResults = localResults.sort(function byDistance(a, b) {
+               return a.distance - b.distance;
+             });
+             result = result.concat(localResults);
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
-           } // reset pane, in case user happened to change it..
+             (_geocodeResults || []).forEach(function (d) {
+               if (d.osm_type && d.osm_id) {
+                 // some results may be missing these - #1890
+                 // Make a temporary osmEntity so we can preset match
+                 // and better localize the search result - #4725
+                 var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
+                 var tags = {};
+                 tags[d["class"]] = d.type;
+                 var attrs = {
+                   id: id,
+                   type: d.osm_type,
+                   tags: tags
+                 };
 
+                 if (d.osm_type === 'way') {
+                   // for ways, add some fake closed nodes
+                   attrs.nodes = ['a', 'a']; // so that geometry area is possible
+                 }
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
+                 var tempEntity = osmEntity(attrs);
+                 var tempGraph = coreGraph([tempEntity]);
+                 var matched = _mainPresetIndex.match(tempEntity, tempGraph);
+                 var type = matched && matched.name() || utilDisplayType(id);
+                 result.push({
+                   id: tempEntity.id,
+                   geometry: tempEntity.geometry(tempGraph),
+                   type: type,
+                   name: d.display_name,
+                   extent: new geoExtent([parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])], [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
+                 });
+               }
+             });
 
-           if (context.container().select('.form-field-description').empty()) {
-             return continueTo(retryChooseDescription);
+             if (q.match(/^[0-9]+$/)) {
+               // if query is just a number, possibly an OSM ID without a prefix
+               result.push({
+                 id: 'n' + q,
+                 geometry: 'point',
+                 type: _t('inspector.node'),
+                 name: q
+               });
+               result.push({
+                 id: 'w' + q,
+                 geometry: 'line',
+                 type: _t('inspector.way'),
+                 name: q
+               });
+               result.push({
+                 id: 'r' + q,
+                 geometry: 'relation',
+                 type: _t('inspector.relation'),
+                 name: q
+               });
+             }
+
+             return result;
            }
 
-           context.on('exit.intro', function () {
-             continueTo(play);
-           });
-           reveal('.entity-editor-pane', helpHtml('intro.areas.describe_playground', {
-             button: icon('#iD-icon-close', 'inline')
-           }), {
-             duration: 300
-           });
+           function drawList() {
+             var value = search.property('value');
+             var results = features();
+             list.classed('filtered', value.length);
+             var resultsIndicator = list.selectAll('.no-results-item').data([0]).enter().append('button').property('disabled', true).attr('class', 'no-results-item').call(svgIcon('#iD-icon-alert', 'pre-text'));
+             resultsIndicator.append('span').attr('class', 'entity-name');
+             list.selectAll('.no-results-item .entity-name').html('').call(_t.append('geocoder.no_results_worldwide'));
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+             if (services.geocoder) {
+               list.selectAll('.geocode-item').data([0]).enter().append('button').attr('class', 'geocode-item secondary-action').on('click', geocoderSearch).append('div').attr('class', 'label').append('span').attr('class', 'entity-name').call(_t.append('geocoder.search'));
+             }
 
-         function retryChooseDescription() {
-           if (!_areaID || !context.hasEntity(_areaID)) {
-             return addArea();
+             list.selectAll('.no-results-item').style('display', value.length && !results.length ? 'block' : 'none');
+             list.selectAll('.geocode-item').style('display', value && _geocodeResults === undefined ? 'block' : 'none');
+             list.selectAll('.feature-list-item').data([-1]).remove();
+             var items = list.selectAll('.feature-list-item').data(results, function (d) {
+               return d.id;
+             });
+             var enter = items.enter().insert('button', '.geocode-item').attr('class', 'feature-list-item').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
+             var label = enter.append('div').attr('class', 'label');
+             label.each(function (d) {
+               select(this).call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
+             });
+             label.append('span').attr('class', 'entity-type').text(function (d) {
+               return d.type;
+             });
+             label.append('span').attr('class', 'entity-name').text(function (d) {
+               return d.name;
+             });
+             enter.style('opacity', 0).transition().style('opacity', 1);
+             items.order();
+             items.exit().remove();
            }
 
-           var ids = context.selectedIDs();
+           function mouseover(d3_event, d) {
+             if (d.id === -1) return;
+             utilHighlightEntities([d.id], true, context);
+           }
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _areaID) {
-             return searchPresets();
-           } // reset pane, in case user happened to change it..
+           function mouseout(d3_event, d) {
+             if (d.id === -1) return;
+             utilHighlightEntities([d.id], false, context);
+           }
 
+           function click(d3_event, d) {
+             d3_event.preventDefault();
 
-           context.container().select('.inspector-wrap .panewrap').style('right', '0%');
-           reveal('.entity-editor-pane', helpHtml('intro.areas.retry_add_field', {
-             field: descriptionField.label()
-           }), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(clickAddField);
+             if (d.location) {
+               context.map().centerZoomEase([d.location[1], d.location[0]], 19);
+             } else if (d.entity) {
+               utilHighlightEntities([d.id], false, context);
+               context.enter(modeSelect(context, [d.entity.id]));
+               context.map().zoomToEase(d.entity);
+             } else {
+               // download, zoom to, and select the entity with the given ID
+               context.zoomToEntity(d.id);
              }
-           });
-           context.on('exit.intro', function () {
-             return continueTo(searchPresets);
-           });
-
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
            }
-         }
 
-         function play() {
-           dispatch$1.call('done');
-           reveal('.ideditor', helpHtml('intro.areas.play', {
-             next: _t('intro.lines.title')
-           }), {
-             tooltipBox: '.intro-nav-wrap .chapter-line',
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               reveal('.ideditor');
-             }
-           });
+           function geocoderSearch() {
+             services.geocoder.search(search.property('value'), function (err, resp) {
+               _geocodeResults = resp || [];
+               drawList();
+             });
+           }
          }
 
-         chapter.enter = function () {
-           addArea();
-         };
-
-         chapter.exit = function () {
-           timeouts.forEach(window.clearTimeout);
-           context.on('enter.intro exit.intro', null);
-           context.map().on('move.intro drawn.intro', null);
-           context.history().on('change.intro', null);
-           context.container().select('.inspector-wrap').on('wheel.intro', null);
-           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-           context.container().select('.more-fields .combobox-input').on('click.intro', null);
-         };
-
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
-         };
-
-         return utilRebind(chapter, dispatch$1, 'on');
+         return featureList;
        }
 
-       function uiIntroLine(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var timeouts = [];
-         var _tulipRoadID = null;
-         var flowerRoadID = 'w646';
-         var tulipRoadStart = [-85.6297754121684, 41.95805253325314];
-         var tulipRoadMidpoint = [-85.62975395449628, 41.95787501510204];
-         var tulipRoadIntersection = [-85.62974496187628, 41.95742515554585];
-         var roadCategory = _mainPresetIndex.item('category-road_minor');
-         var residentialPreset = _mainPresetIndex.item('highway/residential');
-         var woodRoadID = 'w525';
-         var woodRoadEndID = 'n2862';
-         var woodRoadAddNode = [-85.62390110349587, 41.95397111462291];
-         var woodRoadDragEndpoint = [-85.623867390213, 41.95466987786487];
-         var woodRoadDragMidpoint = [-85.62386254803509, 41.95430395953872];
-         var washingtonStreetID = 'w522';
-         var twelfthAvenueID = 'w1';
-         var eleventhAvenueEndID = 'n3550';
-         var twelfthAvenueEndID = 'n5';
-         var _washingtonSegmentID = null;
-         var eleventhAvenueEnd = context.entity(eleventhAvenueEndID).loc;
-         var twelfthAvenueEnd = context.entity(twelfthAvenueEndID).loc;
-         var deleteLinesLoc = [-85.6219395542764, 41.95228033922477];
-         var twelfthAvenue = [-85.62219310052491, 41.952505413152956];
-         var chapter = {
-           title: 'intro.lines.title'
-         };
+       function uiImproveOsmComments() {
+         var _qaItem;
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+         function issueComments(selection) {
+           // make the div immediately so it appears above the buttons
+           var comments = selection.selectAll('.comments-container').data([0]);
+           comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments); // must retrieve comments from API before they can be displayed
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+           services.improveOSM.getComments(_qaItem).then(function (d) {
+             if (!d.comments) return; // nothing to do here
 
-         function addLine() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           var msec = transitionTime(tulipRoadStart, context.map().center());
+             var commentEnter = comments.selectAll('.comment').data(d.comments).enter().append('div').attr('class', 'comment');
+             commentEnter.append('div').attr('class', 'comment-avatar').call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+             var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+             var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+             metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+               var osm = services.osm;
+               var selection = select(this);
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+               if (osm && d.username) {
+                 selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.username)).attr('target', '_blank');
+               }
 
-           context.map().centerZoomEase(tulipRoadStart, 18.5, msec);
-           timeout(function () {
-             var tooltip = reveal('button.add-line', helpHtml('intro.lines.add_line'));
-             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-lines');
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'add-line') return;
-               continueTo(startLine);
+               selection.text(function (d) {
+                 return d.username;
+               });
              });
-           }, msec + 100);
-
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
-
-         function startLine() {
-           if (context.mode().id !== 'add-line') return chapter.restart();
-           _tulipRoadID = null;
-           var padding = 70 * Math.pow(2, context.map().zoom() - 18);
-           var box = pad(tulipRoadStart, padding, context);
-           box.height = box.height + 100;
-           var textId = context.lastPointerType() === 'mouse' ? 'start_line' : 'start_line_tap';
-           var startLineString = helpHtml('intro.lines.missing_road') + '{br}' + helpHtml('intro.lines.line_draw_info') + helpHtml('intro.lines.' + textId);
-           reveal(box, startLineString);
-           context.map().on('move.intro drawn.intro', function () {
-             padding = 70 * Math.pow(2, context.map().zoom() - 18);
-             box = pad(tulipRoadStart, padding, context);
-             box.height = box.height + 100;
-             reveal(box, startLineString, {
-               duration: 0
+             metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+               return _t.html('note.status.commented', {
+                 when: localeDateString(d.timestamp)
+               });
              });
+             mainEnter.append('div').attr('class', 'comment-text').append('p').text(function (d) {
+               return d.text;
+             });
+           })["catch"](function (err) {
+             console.log(err); // eslint-disable-line no-console
            });
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'draw-line') return chapter.restart();
-             continueTo(drawLine);
-           });
+         }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
+         function localeDateString(s) {
+           if (!s) return null;
+           var options = {
+             day: 'numeric',
+             month: 'short',
+             year: 'numeric'
+           };
+           var d = new Date(s * 1000); // timestamp is served in seconds, date takes ms
+
+           if (isNaN(d.getTime())) return null;
+           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
          }
 
-         function drawLine() {
-           if (context.mode().id !== 'draw-line') return chapter.restart();
-           _tulipRoadID = context.mode().selectedIDs()[0];
-           context.map().centerEase(tulipRoadMidpoint, 500);
-           timeout(function () {
-             var padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-             var box = pad(tulipRoadMidpoint, padding, context);
-             box.height = box.height * 2;
-             reveal(box, helpHtml('intro.lines.intersect', {
-               name: _t('intro.graph.name.flower-street')
-             }));
-             context.map().on('move.intro drawn.intro', function () {
-               padding = 200 * Math.pow(2, context.map().zoom() - 18.5);
-               box = pad(tulipRoadMidpoint, padding, context);
-               box.height = box.height * 2;
-               reveal(box, helpHtml('intro.lines.intersect', {
-                 name: _t('intro.graph.name.flower-street')
-               }), {
-                 duration: 0
-               });
-             });
-           }, 550); // after easing..
+         issueComments.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return issueComments;
+         };
 
-           context.history().on('change.intro', function () {
-             if (isLineConnected()) {
-               continueTo(continueLine);
-             }
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'draw-line') {
-               return;
-             } else if (mode.id === 'select') {
-               continueTo(retryIntersect);
-               return;
-             } else {
-               return chapter.restart();
-             }
-           });
+         return issueComments;
+       }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
+       function uiImproveOsmDetails(context) {
+         var _qaItem;
+
+         function issueDetail(d) {
+           if (d.desc) return d.desc;
+           var issueKey = d.issueKey;
+           d.replacements = d.replacements || {};
+           d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string
+
+           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".description"), d.replacements);
          }
 
-         function isLineConnected() {
-           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
-
-           if (!entity) return false;
-           var drawNodes = context.graph().childNodes(entity);
-           return drawNodes.some(function (node) {
-             return context.graph().parentWays(node).some(function (parent) {
-               return parent.id === flowerRoadID;
-             });
+         function improveOsmDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
            });
-         }
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-         function retryIntersect() {
-           select(window).on('pointerdown.intro mousedown.intro', eventCancel, true);
-           var box = pad(tulipRoadIntersection, 80, context);
-           reveal(box, helpHtml('intro.lines.retry_intersect', {
-             name: _t('intro.graph.name.flower-street')
-           }));
-           timeout(chapter.restart, 3000);
-         }
+           var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           descriptionEnter.append('h4').call(_t.append('QA.keepRight.detail_description'));
+           descriptionEnter.append('div').attr('class', 'qa-details-description-text').text(issueDetail); // If there are entity links in the error message..
 
-         function continueLine() {
-           if (context.mode().id !== 'draw-line') return chapter.restart();
+           var relatedEntities = [];
+           descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+             var link = select(this);
+             var isObjectLink = link.classed('error_object_link');
+             var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+             var entity = context.hasEntity(entityID);
+             relatedEntities.push(entityID); // Add click handler
 
-           var entity = _tulipRoadID && context.hasEntity(_tulipRoadID);
+             link.on('mouseenter', function () {
+               utilHighlightEntities([entityID], true, context);
+             }).on('mouseleave', function () {
+               utilHighlightEntities([entityID], false, context);
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               utilHighlightEntities([entityID], false, context);
+               var osmlayer = context.layers().layer('osm');
 
-           if (!entity) return chapter.restart();
-           context.map().centerEase(tulipRoadIntersection, 500);
-           var continueLineText = helpHtml('intro.lines.continue_line') + '{br}' + helpHtml('intro.lines.finish_line_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.lines.finish_road');
-           reveal('.surface', continueLineText);
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'draw-line') return;else if (mode.id === 'select') return continueTo(chooseCategoryRoad);else return chapter.restart();
-           });
+               if (!osmlayer.enabled()) {
+                 osmlayer.enabled(true);
+               }
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+               context.map().centerZoom(_qaItem.loc, 20);
 
-         function chooseCategoryRoad() {
-           if (context.mode().id !== 'select') return chapter.restart();
-           context.on('exit.intro', function () {
-             return chapter.restart();
-           });
-           var button = context.container().select('.preset-category-road_minor .preset-list-button');
-           if (button.empty()) return chapter.restart(); // disallow scrolling
+               if (entity) {
+                 context.enter(modeSelect(context, [entityID]));
+               } else {
+                 context.loadEntity(entityID, function (err, result) {
+                   if (err) return;
+                   var entity = result.data.find(function (e) {
+                     return e.id === entityID;
+                   });
+                   if (entity) context.enter(modeSelect(context, [entityID]));
+                 });
+               }
+             }); // Replace with friendly name if possible
+             // (The entity may not yet be loaded into the graph)
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-           timeout(function () {
-             // reset pane, in case user somehow happened to change it..
-             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-             reveal(button.node(), helpHtml('intro.lines.choose_category_road', {
-               category: roadCategory.name()
-             }));
-             button.on('click.intro', function () {
-               continueTo(choosePresetResidential);
-             });
-           }, 400); // after editor pane visible
+             if (entity) {
+               var name = utilDisplayName(entity); // try to use common name
 
-           function continueTo(nextStep) {
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.container().select('.preset-list-button').on('click.intro', null);
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+               if (!name && !isObjectLink) {
+                 var preset = _mainPresetIndex.match(entity, context.graph());
+                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+               }
 
-         function choosePresetResidential() {
-           if (context.mode().id !== 'select') return chapter.restart();
-           context.on('exit.intro', function () {
-             return chapter.restart();
-           });
-           var subgrid = context.container().select('.preset-category-road_minor .subgrid');
-           if (subgrid.empty()) return chapter.restart();
-           subgrid.selectAll(':not(.preset-highway-residential) .preset-list-button').on('click.intro', function () {
-             continueTo(retryPresetResidential);
-           });
-           subgrid.selectAll('.preset-highway-residential .preset-list-button').on('click.intro', function () {
-             continueTo(nameRoad);
-           });
-           timeout(function () {
-             reveal(subgrid.node(), helpHtml('intro.lines.choose_preset_residential', {
-               preset: residentialPreset.name()
-             }), {
-               tooltipBox: '.preset-highway-residential .preset-list-button',
-               duration: 300
-             });
-           }, 300);
+               if (name) {
+                 this.innerText = name;
+               }
+             }
+           }); // Don't hide entities related to this error - #5880
 
-           function continueTo(nextStep) {
-             context.container().select('.preset-list-button').on('click.intro', null);
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         } // selected wrong road type
+           context.features().forceVisible(relatedEntities);
+           context.map().pan([0, 0]); // trigger a redraw
+         }
 
+         improveOsmDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmDetails;
+         };
 
-         function retryPresetResidential() {
-           if (context.mode().id !== 'select') return chapter.restart();
-           context.on('exit.intro', function () {
-             return chapter.restart();
-           }); // disallow scrolling
+         return improveOsmDetails;
+       }
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-           timeout(function () {
-             var button = context.container().select('.entity-editor-pane .preset-list-button');
-             reveal(button.node(), helpHtml('intro.lines.retry_preset_residential', {
-               preset: residentialPreset.name()
-             }));
-             button.on('click.intro', function () {
-               continueTo(chooseCategoryRoad);
-             });
-           }, 500);
+       function uiImproveOsmHeader() {
+         var _qaItem;
 
-           function continueTo(nextStep) {
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.container().select('.preset-list-button').on('click.intro', null);
-             context.on('exit.intro', null);
-             nextStep();
-           }
+         function issueTitle(d) {
+           var issueKey = d.issueKey;
+           d.replacements = d.replacements || {};
+           d.replacements["default"] = _t.html('inspector.unknown'); // special key `default` works as a fallback string
+
+           return _t.html("QA.improveOSM.error_types.".concat(issueKey, ".title"), d.replacements);
          }
 
-         function nameRoad() {
-           context.on('exit.intro', function () {
-             continueTo(didNameRoad);
+         function improveOsmHeader(selection) {
+           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
            });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.lines.name_road', {
-               button: icon('#iD-icon-close', 'inline')
-             }), {
-               tooltipClass: 'intro-lines-name_road'
-             });
-           }, 500);
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+           var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+             return d.id < 0;
+           }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           });
+           svgEnter.append('polygon').attr('fill', 'currentColor').attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+           svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+             var picon = d.icon;
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
+             if (!picon) {
+               return '';
+             } else {
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
+             }
+           });
+           headerEnter.append('div').attr('class', 'qa-header-label').text(issueTitle);
          }
 
-         function didNameRoad() {
-           context.history().checkpoint('doneAddLine');
-           timeout(function () {
-             reveal('.surface', helpHtml('intro.lines.did_name_road'), {
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: function buttonCallback() {
-                 continueTo(updateLine);
-               }
-             });
-           }, 500);
+         improveOsmHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmHeader;
+         };
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
-         }
+         return improveOsmHeader;
+       }
 
-         function updateLine() {
-           context.history().reset('doneAddLine');
+       function uiImproveOsmEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiImproveOsmDetails(context);
+         var qaComments = uiImproveOsmComments();
+         var qaHeader = uiImproveOsmHeader();
 
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return chapter.restart();
-           }
+         var _qaItem;
 
-           var msec = transitionTime(woodRoadDragMidpoint, context.map().center());
+         function improveOsmEditor(selection) {
+           var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+             return context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h2').call(_t.append('QA.improveOSM.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.qa-editor').data([0]);
+           editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(qaComments.issue(_qaItem)).call(improveOsmSaveSection);
+         }
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+         function improveOsmSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           context.map().centerZoomEase(woodRoadDragMidpoint, 19, msec);
-           timeout(function () {
-             var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-             var box = pad(woodRoadDragMidpoint, padding, context);
+           var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           }); // exit
 
-             var advance = function advance() {
-               continueTo(addNode);
-             };
+           saveSection.exit().remove(); // enter
 
-             reveal(box, helpHtml('intro.lines.update_line'), {
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: advance
-             });
-             context.map().on('move.intro drawn.intro', function () {
-               var padding = 250 * Math.pow(2, context.map().zoom() - 19);
-               var box = pad(woodRoadDragMidpoint, padding, context);
-               reveal(box, helpHtml('intro.lines.update_line'), {
-                 duration: 0,
-                 buttonText: _t.html('intro.ok'),
-                 buttonCallback: advance
-               });
-             });
-           }, msec + 100);
+           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+           saveSectionEnter.append('h4').attr('class', '.qa-save-header').call(_t.append('note.newComment'));
+           saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+             return d.newComment;
+           }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-         function addNode() {
-           context.history().reset('doneAddLine');
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim();
 
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return chapter.restart();
-           }
+             if (val === '') {
+               val = undefined;
+             } // store the unsaved comment with the issue itself
 
-           var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-           var box = pad(woodRoadAddNode, padding, context);
-           var addNodeString = helpHtml('intro.lines.add_node' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-           reveal(box, addNodeString);
-           context.map().on('move.intro drawn.intro', function () {
-             var padding = 40 * Math.pow(2, context.map().zoom() - 19);
-             var box = pad(woodRoadAddNode, padding, context);
-             reveal(box, addNodeString, {
-               duration: 0
+
+             _qaItem = _qaItem.update({
+               newComment: val
              });
-           });
-           context.history().on('change.intro', function (changed) {
-             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-               return continueTo(updateLine);
-             }
+             var qaService = services.improveOSM;
 
-             if (changed.created().length === 1) {
-               timeout(function () {
-                 continueTo(startDragEndpoint);
-               }, 500);
-             }
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'select') {
-               continueTo(updateLine);
+             if (qaService) {
+               qaService.replaceItem(_qaItem);
              }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+             saveSection.call(qaSaveButtons);
            }
          }
 
-         function startDragEndpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
-           }
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-           var box = pad(woodRoadDragEndpoint, padding, context);
-           var startDragString = helpHtml('intro.lines.start_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch')) + helpHtml('intro.lines.drag_to_intersection');
-           reveal(box, startDragString);
-           context.map().on('move.intro drawn.intro', function () {
-             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-               return continueTo(updateLine);
-             }
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-             var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-             var box = pad(woodRoadDragEndpoint, padding, context);
-             reveal(box, startDragString, {
-               duration: 0
-             });
-             var entity = context.entity(woodRoadEndID);
+           buttonSection.exit().remove(); // enter
 
-             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) <= 4) {
-               continueTo(finishDragEndpoint);
-             }
-           });
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+           buttonEnter.append('button').attr('class', 'button comment-button action').call(_t.append('QA.keepRight.save_comment'));
+           buttonEnter.append('button').attr('class', 'button close-button action');
+           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.select('.comment-button').attr('disabled', function (d) {
+             return d.newComment ? null : true;
+           }).on('click.comment', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
 
-         function finishDragEndpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
-           }
+             var qaService = services.improveOSM;
 
-           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-           var box = pad(woodRoadDragEndpoint, padding, context);
-           var finishDragString = helpHtml('intro.lines.spot_looks_good') + helpHtml('intro.lines.finish_drag_endpoint' + (context.lastPointerType() === 'mouse' ? '' : '_touch'));
-           reveal(box, finishDragString);
-           context.map().on('move.intro drawn.intro', function () {
-             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-               return continueTo(updateLine);
+             if (qaService) {
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
              }
+           });
+           buttonSection.select('.close-button').html(function (d) {
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html("QA.keepRight.close".concat(andComment));
+           }).on('click.close', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
 
-             var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-             var box = pad(woodRoadDragEndpoint, padding, context);
-             reveal(box, finishDragString, {
-               duration: 0
-             });
-             var entity = context.entity(woodRoadEndID);
+             var qaService = services.improveOSM;
 
-             if (geoSphericalDistance(entity.loc, woodRoadDragEndpoint) > 4) {
-               continueTo(startDragEndpoint);
+             if (qaService) {
+               d.newStatus = 'SOLVED';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
              }
            });
-           context.on('enter.intro', function () {
-             continueTo(startDragMidpoint);
+           buttonSection.select('.ignore-button').html(function (d) {
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html("QA.keepRight.ignore".concat(andComment));
+           }).on('click.ignore', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
+
+             var qaService = services.improveOSM;
+
+             if (qaService) {
+               d.newStatus = 'INVALID';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
            });
+         } // NOTE: Don't change method name until UI v3 is merged
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
 
-         function startDragMidpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
-           }
+         improveOsmEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return improveOsmEditor;
+         };
 
-           if (context.selectedIDs().indexOf(woodRoadID) === -1) {
-             context.enter(modeSelect(context, [woodRoadID]));
-           }
+         return utilRebind(improveOsmEditor, dispatch, 'on');
+       }
 
-           var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-           var box = pad(woodRoadDragMidpoint, padding, context);
-           reveal(box, helpHtml('intro.lines.start_drag_midpoint'));
-           context.map().on('move.intro drawn.intro', function () {
-             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-               return continueTo(updateLine);
-             }
+       function uiPresetList(context) {
+         var dispatch = dispatch$8('cancel', 'choose');
 
-             var padding = 80 * Math.pow(2, context.map().zoom() - 19);
-             var box = pad(woodRoadDragMidpoint, padding, context);
-             reveal(box, helpHtml('intro.lines.start_drag_midpoint'), {
-               duration: 0
-             });
-           });
-           context.history().on('change.intro', function (changed) {
-             if (changed.created().length === 1) {
-               continueTo(continueDragMidpoint);
-             }
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'select') {
-               // keep Wood Road selected so midpoint triangles are drawn..
-               context.enter(modeSelect(context, [woodRoadID]));
-             }
-           });
+         var _entityIDs;
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+         var _currLoc;
 
-         function continueDragMidpoint() {
-           if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-             return continueTo(updateLine);
-           }
+         var _currentPresets;
 
-           var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-           var box = pad(woodRoadDragEndpoint, padding, context);
-           box.height += 400;
+         var _autofocus = false;
 
-           var advance = function advance() {
-             context.history().checkpoint('doneUpdateLine');
-             continueTo(deleteLines);
-           };
+         function presetList(selection) {
+           if (!_entityIDs) return;
+           var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
+           selection.html('');
+           var messagewrap = selection.append('div').attr('class', 'header fillL');
+           var message = messagewrap.append('h2').call(_t.append('inspector.choose'));
+           var direction = _mainLocalizer.textDirection() === 'rtl' ? 'backward' : 'forward';
+           messagewrap.append('button').attr('class', 'preset-choose').attr('title', direction).on('click', function () {
+             dispatch.call('cancel', this);
+           }).call(svgIcon("#iD-icon-".concat(direction)));
 
-           reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: advance
-           });
-           context.map().on('move.intro drawn.intro', function () {
-             if (!context.hasEntity(woodRoadID) || !context.hasEntity(woodRoadEndID)) {
-               return continueTo(updateLine);
+           function initialKeydown(d3_event) {
+             // hack to let delete shortcut work when search is autofocused
+             if (search.property('value').length === 0 && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               operationDelete(context, _entityIDs)(); // hack to let undo work when search is autofocused
+             } else if (search.property('value').length === 0 && (d3_event.ctrlKey || d3_event.metaKey) && d3_event.keyCode === utilKeybinding.keyCodes.z) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation();
+               context.undo();
+             } else if (!d3_event.ctrlKey && !d3_event.metaKey) {
+               // don't check for delete/undo hack on future keydown events
+               select(this).on('keydown', keydown);
+               keydown.call(this, d3_event);
              }
-
-             var padding = 100 * Math.pow(2, context.map().zoom() - 19);
-             var box = pad(woodRoadDragEndpoint, padding, context);
-             box.height += 400;
-             reveal(box, helpHtml('intro.lines.continue_drag_midpoint'), {
-               duration: 0,
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: advance
-             });
-           });
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
            }
-         }
 
-         function deleteLines() {
-           context.history().reset('doneUpdateLine');
-           context.enter(modeBrowse(context));
+           function keydown(d3_event) {
+             // down arrow
+             if (d3_event.keyCode === utilKeybinding.keyCodes['↓'] && // if insertion point is at the end of the string
+             search.node().selectionStart === search.property('value').length) {
+               d3_event.preventDefault();
+               d3_event.stopPropagation(); // move focus to the first item in the preset list
 
-           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return chapter.restart();
+               var buttons = list.selectAll('.preset-list-button');
+               if (!buttons.empty()) buttons.nodes()[0].focus();
+             }
            }
 
-           var msec = transitionTime(deleteLinesLoc, context.map().center());
+           function keypress(d3_event) {
+             // enter
+             var value = search.property('value');
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
+             if (d3_event.keyCode === 13 && // ↩ Return
+             value.length) {
+               list.selectAll('.preset-list-item:first-child').each(function (d) {
+                 d.choose.call(this);
+               });
+             }
            }
 
-           context.map().centerZoomEase(deleteLinesLoc, 18, msec);
-           timeout(function () {
-             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-             var box = pad(deleteLinesLoc, padding, context);
-             box.top -= 200;
-             box.height += 400;
-
-             var advance = function advance() {
-               continueTo(rightClickIntersection);
-             };
+           function inputevent() {
+             var value = search.property('value');
+             list.classed('filtered', value.length);
+             var results, messageText;
 
-             reveal(box, helpHtml('intro.lines.delete_lines', {
-               street: _t('intro.graph.name.12th-avenue')
-             }), {
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: advance
-             });
-             context.map().on('move.intro drawn.intro', function () {
-               var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-               var box = pad(deleteLinesLoc, padding, context);
-               box.top -= 200;
-               box.height += 400;
-               reveal(box, helpHtml('intro.lines.delete_lines', {
-                 street: _t('intro.graph.name.12th-avenue')
-               }), {
-                 duration: 0,
-                 buttonText: _t.html('intro.ok'),
-                 buttonCallback: advance
+             if (value.length) {
+               results = presets.search(value, entityGeometries()[0], _currLoc);
+               messageText = _t.html('inspector.results', {
+                 n: results.collection.length,
+                 search: value
                });
-             });
-             context.history().on('change.intro', function () {
-               timeout(function () {
-                 continueTo(deleteLines);
-               }, 500); // after any transition (e.g. if user deleted intersection)
-             });
-           }, msec + 100);
+             } else {
+               results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc);
+               messageText = _t.html('inspector.choose');
+             }
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+             list.call(drawList, results);
+             message.html(messageText);
            }
-         }
 
-         function rightClickIntersection() {
-           context.history().reset('doneUpdateLine');
-           context.enter(modeBrowse(context));
-           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
-           var rightClickString = helpHtml('intro.lines.split_street', {
-             street1: _t('intro.graph.name.11th-avenue'),
-             street2: _t('intro.graph.name.washington-street')
-           }) + helpHtml('intro.lines.' + (context.lastPointerType() === 'mouse' ? 'rightclick_intersection' : 'edit_menu_intersection_touch'));
-           timeout(function () {
-             var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-             var box = pad(eleventhAvenueEnd, padding, context);
-             reveal(box, rightClickString);
-             context.map().on('move.intro drawn.intro', function () {
-               var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-               var box = pad(eleventhAvenueEnd, padding, context);
-               reveal(box, rightClickString, {
-                 duration: 0
-               });
-             });
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'select') return;
-               var ids = context.selectedIDs();
-               if (ids.length !== 1 || ids[0] !== eleventhAvenueEndID) return;
-               timeout(function () {
-                 var node = selectMenuItem(context, 'split').node();
-                 if (!node) return;
-                 continueTo(splitIntersection);
-               }, 50); // after menu visible
-             });
-             context.history().on('change.intro', function () {
-               timeout(function () {
-                 continueTo(deleteLines);
-               }, 300); // after any transition (e.g. if user deleted intersection)
-             });
-           }, 600);
+           var searchWrap = selection.append('div').attr('class', 'search-header');
+           searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
+           var search = searchWrap.append('input').attr('class', 'preset-search-input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keydown', initialKeydown).on('keypress', keypress).on('input', debounce(inputevent));
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+           if (_autofocus) {
+             search.node().focus(); // Safari 14 doesn't always like to focus immediately,
+             // so try again on the next pass
 
-         function splitIntersection() {
-           if (!context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(deleteLines);
+             setTimeout(function () {
+               search.node().focus();
+             }, 0);
            }
 
-           var node = selectMenuItem(context, 'split').node();
-
-           if (!node) {
-             return continueTo(rightClickIntersection);
-           }
+           var listWrap = selection.append('div').attr('class', 'inspector-body');
+           var list = listWrap.append('div').attr('class', 'preset-list').call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro(), _currLoc));
+           context.features().on('change.preset-list', updateForFeatureHiddenState);
+         }
 
-           var wasChanged = false;
-           _washingtonSegmentID = null;
-           reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
-             street: _t('intro.graph.name.washington-street')
-           }), {
-             padding: 50
-           });
-           context.map().on('move.intro drawn.intro', function () {
-             var node = selectMenuItem(context, 'split').node();
+         function drawList(list, presets) {
+           presets = presets.matchAllGeometry(entityGeometries());
+           var collection = presets.collection.reduce(function (collection, preset) {
+             if (!preset) return collection;
 
-             if (!wasChanged && !node) {
-               return continueTo(rightClickIntersection);
+             if (preset.members) {
+               if (preset.members.collection.filter(function (preset) {
+                 return preset.addable();
+               }).length > 1) {
+                 collection.push(CategoryItem(preset));
+               }
+             } else if (preset.addable()) {
+               collection.push(PresetItem(preset));
              }
 
-             reveal('.edit-menu', helpHtml('intro.lines.split_intersection', {
-               street: _t('intro.graph.name.washington-street')
-             }), {
-               duration: 0,
-               padding: 50
-             });
-           });
-           context.history().on('change.intro', function (changed) {
-             wasChanged = true;
-             timeout(function () {
-               if (context.history().undoAnnotation() === _t('operations.split.annotation.line', {
-                 n: 1
-               })) {
-                 _washingtonSegmentID = changed.created()[0].id;
-                 continueTo(didSplit);
-               } else {
-                 _washingtonSegmentID = null;
-                 continueTo(retrySplit);
-               }
-             }, 300); // after any transition (e.g. if user deleted intersection)
+             return collection;
+           }, []);
+           var items = list.selectAll('.preset-list-item').data(collection, function (d) {
+             return d.preset.id;
            });
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
+           items.order();
+           items.exit().remove();
+           items.enter().append('div').attr('class', function (item) {
+             return 'preset-list-item preset-' + item.preset.id.replace('/', '-');
+           }).classed('current', function (item) {
+             return _currentPresets.indexOf(item.preset) !== -1;
+           }).each(function (item) {
+             select(this).call(item);
+           }).style('opacity', 0).transition().style('opacity', 1);
+           updateForFeatureHiddenState();
          }
 
-         function retrySplit() {
-           context.enter(modeBrowse(context));
-           context.map().centerZoomEase(eleventhAvenueEnd, 18, 500);
+         function itemKeydown(d3_event) {
+           // the actively focused item
+           var item = select(this.closest('.preset-list-item'));
+           var parentItem = select(item.node().parentNode.closest('.preset-list-item')); // arrow down, move focus to the next, lower item
 
-           var advance = function advance() {
-             continueTo(rightClickIntersection);
-           };
+           if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // the next item in the list at the same level
 
-           var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-           var box = pad(eleventhAvenueEnd, padding, context);
-           reveal(box, helpHtml('intro.lines.retry_split'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: advance
-           });
-           context.map().on('move.intro drawn.intro', function () {
-             var padding = 60 * Math.pow(2, context.map().zoom() - 18);
-             var box = pad(eleventhAvenueEnd, padding, context);
-             reveal(box, helpHtml('intro.lines.retry_split'), {
-               duration: 0,
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: advance
-             });
-           });
+             var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
+             if (nextItem.empty()) {
+               // if there is a parent item
+               if (!parentItem.empty()) {
+                 // the item is the last item of a sublist,
+                 // select the next item at the parent level
+                 nextItem = select(parentItem.node().nextElementSibling);
+               } // if the focused item is expanded
 
-         function didSplit() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
-           }
+             } else if (select(this).classed('expanded')) {
+               // select the first subitem instead
+               nextItem = item.select('.subgrid .preset-list-item:first-child');
+             }
 
-           var ids = context.selectedIDs();
-           var string = 'intro.lines.did_split_' + (ids.length > 1 ? 'multi' : 'single');
-           var street = _t('intro.graph.name.washington-street');
-           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-           var box = pad(twelfthAvenue, padding, context);
-           box.width = box.width / 2;
-           reveal(box, helpHtml(string, {
-             street1: street,
-             street2: street
-           }), {
-             duration: 500
-           });
-           timeout(function () {
-             context.map().centerZoomEase(twelfthAvenue, 18, 500);
-             context.map().on('move.intro drawn.intro', function () {
-               var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-               var box = pad(twelfthAvenue, padding, context);
-               box.width = box.width / 2;
-               reveal(box, helpHtml(string, {
-                 street1: street,
-                 street2: street
-               }), {
-                 duration: 0
-               });
-             });
-           }, 600); // after initial reveal and curtain cut
+             if (!nextItem.empty()) {
+               // focus on the next item
+               nextItem.select('.preset-list-button').node().focus();
+             } // arrow up, move focus to the previous, higher item
 
-           context.on('enter.intro', function () {
-             var ids = context.selectedIDs();
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // the previous item in the list at the same level
 
-             if (ids.length === 1 && ids[0] === _washingtonSegmentID) {
-               continueTo(multiSelect);
-             }
-           });
-           context.history().on('change.intro', function () {
-             if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-               return continueTo(rightClickIntersection);
+             var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
+
+             if (previousItem.empty()) {
+               // if there is a parent item
+               if (!parentItem.empty()) {
+                 // the item is the first subitem of a sublist select the parent item
+                 previousItem = parentItem;
+               } // if the previous item is expanded
+
+             } else if (previousItem.select('.preset-list-button').classed('expanded')) {
+               // select the last subitem of the sublist of the previous item
+               previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
              }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+             if (!previousItem.empty()) {
+               // focus on the previous item
+               previousItem.select('.preset-list-button').node().focus();
+             } else {
+               // the focus is at the top of the list, move focus back to the search field
+               var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
+               search.node().focus();
+             } // arrow left, move focus to the parent item if there is one
 
-         function multiSelect() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
-           }
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // if there is a parent item, focus on the parent item
 
-           var ids = context.selectedIDs();
-           var hasWashington = ids.indexOf(_washingtonSegmentID) !== -1;
-           var hasTwelfth = ids.indexOf(twelfthAvenueID) !== -1;
+             if (!parentItem.empty()) {
+               parentItem.select('.preset-list-button').node().focus();
+             } // arrow right, choose this item
 
-           if (hasWashington && hasTwelfth) {
-             return continueTo(multiRightClick);
-           } else if (!hasWashington && !hasTwelfth) {
-             return continueTo(didSplit);
+           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             item.datum().choose.call(select(this).node());
            }
+         }
 
-           context.map().centerZoomEase(twelfthAvenue, 18, 500);
-           timeout(function () {
-             var selected, other, padding, box;
+         function CategoryItem(preset) {
+           var box,
+               sublist,
+               shown = false;
 
-             if (hasWashington) {
-               selected = _t('intro.graph.name.washington-street');
-               other = _t('intro.graph.name.12th-avenue');
-               padding = 60 * Math.pow(2, context.map().zoom() - 18);
-               box = pad(twelfthAvenueEnd, padding, context);
-               box.width *= 3;
-             } else {
-               selected = _t('intro.graph.name.12th-avenue');
-               other = _t('intro.graph.name.washington-street');
-               padding = 200 * Math.pow(2, context.map().zoom() - 18);
-               box = pad(twelfthAvenue, padding, context);
-               box.width /= 2;
+           function item(selection) {
+             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
+
+             function click() {
+               var isExpanded = select(this).classed('expanded');
+               var iconName = isExpanded ? _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward' : '#iD-icon-down';
+               select(this).classed('expanded', !isExpanded).attr('title', !isExpanded ? _t('icons.collapse') : _t('icons.expand'));
+               select(this).selectAll('div.label-inner svg.icon use').attr('href', iconName);
+               item.choose();
              }
 
-             reveal(box, helpHtml('intro.lines.multi_select', {
-               selected: selected,
-               other1: other
-             }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
-               selected: selected,
-               other2: other
-             }));
-             context.map().on('move.intro drawn.intro', function () {
-               if (hasWashington) {
-                 selected = _t('intro.graph.name.washington-street');
-                 other = _t('intro.graph.name.12th-avenue');
-                 padding = 60 * Math.pow(2, context.map().zoom() - 18);
-                 box = pad(twelfthAvenueEnd, padding, context);
-                 box.width *= 3;
+             var geometries = entityGeometries();
+             var button = wrap.append('button').attr('class', 'preset-list-button').attr('title', _t('icons.expand')).classed('expanded', false).call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', click).on('keydown', function (d3_event) {
+               // right arrow, expand the focused item
+               if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation(); // if the item isn't expanded
+
+                 if (!select(this).classed('expanded')) {
+                   // toggle expansion (expand the item)
+                   click.call(this, d3_event);
+                 } // left arrow, collapse the focused item
+
+               } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
+                 d3_event.preventDefault();
+                 d3_event.stopPropagation(); // if the item is expanded
+
+                 if (select(this).classed('expanded')) {
+                   // toggle expansion (collapse the item)
+                   click.call(this, d3_event);
+                 }
                } else {
-                 selected = _t('intro.graph.name.12th-avenue');
-                 other = _t('intro.graph.name.washington-street');
-                 padding = 200 * Math.pow(2, context.map().zoom() - 18);
-                 box = pad(twelfthAvenue, padding, context);
-                 box.width /= 2;
+                 itemKeydown.call(this, d3_event);
                }
-
-               reveal(box, helpHtml('intro.lines.multi_select', {
-                 selected: selected,
-                 other1: other
-               }) + ' ' + helpHtml('intro.lines.add_to_selection_' + (context.lastPointerType() === 'mouse' ? 'click' : 'touch'), {
-                 selected: selected,
-                 other2: other
-               }), {
-                 duration: 0
-               });
-             });
-             context.on('enter.intro', function () {
-               continueTo(multiSelect);
              });
-             context.history().on('change.intro', function () {
-               if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-                 return continueTo(rightClickIntersection);
-               }
+             var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+             label.append('div').attr('class', 'namepart').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline')).append('span').html(function () {
+               return preset.nameLabel() + '&hellip;';
              });
-           }, 600);
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
-
-         function multiRightClick() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
+             box = selection.append('div').attr('class', 'subgrid').style('max-height', '0px').style('opacity', 0);
+             box.append('div').attr('class', 'arrow');
+             sublist = box.append('div').attr('class', 'preset-list fillL3');
            }
 
-           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-           var box = pad(twelfthAvenue, padding, context);
-           var rightClickString = helpHtml('intro.lines.multi_select_success') + helpHtml('intro.lines.multi_' + (context.lastPointerType() === 'mouse' ? 'rightclick' : 'edit_menu_touch'));
-           reveal(box, rightClickString);
-           context.map().on('move.intro drawn.intro', function () {
-             var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-             var box = pad(twelfthAvenue, padding, context);
-             reveal(box, rightClickString, {
-               duration: 0
-             });
-           });
-           context.ui().editMenu().on('toggled.intro', function (open) {
-             if (!open) return;
-             timeout(function () {
-               var ids = context.selectedIDs();
+           item.choose = function () {
+             if (!box || !sublist) return;
 
-               if (ids.length === 2 && ids.indexOf(twelfthAvenueID) !== -1 && ids.indexOf(_washingtonSegmentID) !== -1) {
-                 var node = selectMenuItem(context, 'delete').node();
-                 if (!node) return;
-                 continueTo(multiDelete);
-               } else if (ids.length === 1 && ids.indexOf(_washingtonSegmentID) !== -1) {
-                 return continueTo(multiSelect);
-               } else {
-                 return continueTo(didSplit);
-               }
-             }, 300); // after edit menu visible
-           });
-           context.history().on('change.intro', function () {
-             if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-               return continueTo(rightClickIntersection);
+             if (shown) {
+               shown = false;
+               box.transition().duration(200).style('opacity', '0').style('max-height', '0px').style('padding-bottom', '0px');
+             } else {
+               shown = true;
+               var members = preset.members.matchAllGeometry(entityGeometries());
+               sublist.call(drawList, members);
+               box.transition().duration(200).style('opacity', '1').style('max-height', 200 + members.collection.length * 190 + 'px').style('padding-bottom', '10px');
              }
-           });
+           };
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.ui().editMenu().on('toggled.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+           item.preset = preset;
+           return item;
+         }
+
+         function PresetItem(preset) {
+           function item(selection) {
+             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap');
+             var geometries = entityGeometries();
+             var button = wrap.append('button').attr('class', 'preset-list-button').call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', item.choose).on('keydown', itemKeydown);
+             var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
+             var nameparts = [preset.nameLabel(), preset.subtitleLabel()].filter(Boolean);
+             label.selectAll('.namepart').data(nameparts).enter().append('div').attr('class', 'namepart').html(function (d) {
+               return d;
+             });
+             wrap.call(item.reference.button);
+             selection.call(item.reference.body);
            }
-         }
 
-         function multiDelete() {
-           if (!_washingtonSegmentID || !context.hasEntity(_washingtonSegmentID) || !context.hasEntity(washingtonStreetID) || !context.hasEntity(twelfthAvenueID) || !context.hasEntity(eleventhAvenueEndID)) {
-             return continueTo(rightClickIntersection);
-           }
+           item.choose = function () {
+             if (select(this).classed('disabled')) return;
 
-           var node = selectMenuItem(context, 'delete').node();
-           if (!node) return continueTo(multiRightClick);
-           reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
-             padding: 50
-           });
-           context.map().on('move.intro drawn.intro', function () {
-             reveal('.edit-menu', helpHtml('intro.lines.multi_delete'), {
-               duration: 0,
-               padding: 50
-             });
-           });
-           context.on('exit.intro', function () {
-             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-               return continueTo(multiSelect); // left select mode but roads still exist
-             }
-           });
-           context.history().on('change.intro', function () {
-             if (context.hasEntity(_washingtonSegmentID) || context.hasEntity(twelfthAvenueID)) {
-               continueTo(retryDelete); // changed something but roads still exist
-             } else {
-               continueTo(play);
+             if (!context.inIntro()) {
+               _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
              }
-           });
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('exit.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
+             context.perform(function (graph) {
+               for (var i in _entityIDs) {
+                 var entityID = _entityIDs[i];
+                 var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
+                 graph = actionChangePreset(entityID, oldPreset, preset)(graph);
+               }
+
+               return graph;
+             }, _t('operations.change_tags.annotation'));
+             context.validator().validate(); // rerun validation
+
+             dispatch.call('choose', this, preset);
+           };
+
+           item.help = function (d3_event) {
+             d3_event.stopPropagation();
+             item.reference.toggle();
+           };
+
+           item.preset = preset;
+           item.reference = uiTagReference(preset.reference());
+           return item;
          }
 
-         function retryDelete() {
-           context.enter(modeBrowse(context));
-           var padding = 200 * Math.pow(2, context.map().zoom() - 18);
-           var box = pad(twelfthAvenue, padding, context);
-           reveal(box, helpHtml('intro.lines.retry_delete'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(multiSelect);
+         function updateForFeatureHiddenState() {
+           if (!_entityIDs.every(context.hasEntity)) return;
+           var geometries = entityGeometries();
+           var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
+
+           button.call(uiTooltip().destroyAny);
+           button.each(function (item, index) {
+             var hiddenPresetFeaturesId;
+
+             for (var i in geometries) {
+               hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
+               if (hiddenPresetFeaturesId) break;
              }
-           });
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
-         }
+             var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
+             select(this).classed('disabled', isHiddenPreset);
 
-         function play() {
-           dispatch$1.call('done');
-           reveal('.ideditor', helpHtml('intro.lines.play', {
-             next: _t('intro.buildings.title')
-           }), {
-             tooltipBox: '.intro-nav-wrap .chapter-building',
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               reveal('.ideditor');
+             if (isHiddenPreset) {
+               var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
+               select(this).call(uiTooltip().title(_t.html('inspector.hidden_preset.' + (isAutoHidden ? 'zoom' : 'manual'), {
+                 features: {
+                   html: _t.html('feature.' + hiddenPresetFeaturesId + '.description')
+                 }
+               })).placement(index < 2 ? 'bottom' : 'top'));
              }
            });
          }
 
-         chapter.enter = function () {
-           addLine();
+         presetList.autofocus = function (val) {
+           if (!arguments.length) return _autofocus;
+           _autofocus = val;
+           return presetList;
          };
 
-         chapter.exit = function () {
-           timeouts.forEach(window.clearTimeout);
-           select(window).on('pointerdown.intro mousedown.intro', null, true);
-           context.on('enter.intro exit.intro', null);
-           context.map().on('move.intro drawn.intro', null);
-           context.history().on('change.intro', null);
-           context.container().select('.inspector-wrap').on('wheel.intro', null);
-           context.container().select('.preset-list-button').on('click.intro', null);
+         presetList.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           _currLoc = null;
+
+           if (_entityIDs && _entityIDs.length) {
+             // calculate current location
+             var extent = _entityIDs.reduce(function (extent, entityID) {
+               var entity = context.graph().entity(entityID);
+               return extent.extend(entity.extent(context.graph()));
+             }, geoExtent());
+
+             _currLoc = extent.center(); // match presets
+
+             var presets = _entityIDs.map(function (entityID) {
+               return _mainPresetIndex.match(context.entity(entityID), context.graph());
+             });
+
+             presetList.presets(presets);
+           }
+
+           return presetList;
          };
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
+         presetList.presets = function (val) {
+           if (!arguments.length) return _currentPresets;
+           _currentPresets = val;
+           return presetList;
          };
 
-         return utilRebind(chapter, dispatch$1, 'on');
-       }
+         function entityGeometries() {
+           var counts = {};
 
-       function uiIntroBuilding(context, reveal) {
-         var dispatch$1 = dispatch('done');
-         var house = [-85.62815, 41.95638];
-         var tank = [-85.62732, 41.95347];
-         var buildingCatetory = _mainPresetIndex.item('category-building');
-         var housePreset = _mainPresetIndex.item('building/house');
-         var tankPreset = _mainPresetIndex.item('man_made/storage_tank');
-         var timeouts = [];
-         var _houseID = null;
-         var _tankID = null;
-         var chapter = {
-           title: 'intro.buildings.title'
-         };
+           for (var i in _entityIDs) {
+             var entityID = _entityIDs[i];
+             var entity = context.entity(entityID);
+             var geometry = entity.geometry(context.graph()); // Treat entities on addr:interpolation lines as points, not vertices (#3241)
 
-         function timeout(f, t) {
-           timeouts.push(window.setTimeout(f, t));
-         }
+             if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
+               geometry = 'point';
+             }
 
-         function eventCancel(d3_event) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-         }
+             if (!counts[geometry]) counts[geometry] = 0;
+             counts[geometry] += 1;
+           }
 
-         function revealHouse(center, text, options) {
-           var padding = 160 * Math.pow(2, context.map().zoom() - 20);
-           var box = pad(center, padding, context);
-           reveal(box, text, options);
+           return Object.keys(counts).sort(function (geom1, geom2) {
+             return counts[geom2] - counts[geom1];
+           });
          }
 
-         function revealTank(center, text, options) {
-           var padding = 190 * Math.pow(2, context.map().zoom() - 19.5);
-           var box = pad(center, padding, context);
-           reveal(box, text, options);
-         }
+         return utilRebind(presetList, dispatch, 'on');
+       }
 
-         function addHouse() {
-           context.enter(modeBrowse(context));
-           context.history().reset('initial');
-           _houseID = null;
-           var msec = transitionTime(house, context.map().center());
+       function uiViewOnOSM(context) {
+         var _what; // an osmEntity or osmNote
 
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
 
-           context.map().centerZoomEase(house, 19, msec);
-           timeout(function () {
-             var tooltip = reveal('button.add-area', helpHtml('intro.buildings.add_building'));
-             tooltip.selectAll('.popover-inner').insert('svg', 'span').attr('class', 'tooltip-illustration').append('use').attr('xlink:href', '#iD-graphic-buildings');
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'add-area') return;
-               continueTo(startHouse);
-             });
-           }, msec + 100);
+         function viewOnOSM(selection) {
+           var url;
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
+           if (_what instanceof osmEntity) {
+             url = context.connection().entityURL(_what);
+           } else if (_what instanceof osmNote) {
+             url = context.connection().noteURL(_what);
            }
-         }
 
-         function startHouse() {
-           if (context.mode().id !== 'add-area') {
-             return continueTo(addHouse);
-           }
+           var data = !_what || _what.isNew() ? [] : [_what];
+           var link = selection.selectAll('.view-on-osm').data(data, function (d) {
+             return d.id;
+           }); // exit
 
-           _houseID = null;
-           context.map().zoomEase(20, 500);
-           timeout(function () {
-             var startString = helpHtml('intro.buildings.start_building') + helpHtml('intro.buildings.building_corner_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-             revealHouse(house, startString);
-             context.map().on('move.intro drawn.intro', function () {
-               revealHouse(house, startString, {
-                 duration: 0
-               });
-             });
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'draw-area') return chapter.restart();
-               continueTo(continueHouse);
-             });
-           }, 550); // after easing
+           link.exit().remove(); // enter
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
+           var linkEnter = link.enter().append('a').attr('class', 'view-on-osm').attr('target', '_blank').attr('href', url).call(svgIcon('#iD-icon-out-link', 'inline'));
+           linkEnter.append('span').call(_t.append('inspector.view_on_osm'));
          }
 
-         function continueHouse() {
-           if (context.mode().id !== 'draw-area') {
-             return continueTo(addHouse);
-           }
+         viewOnOSM.what = function (_) {
+           if (!arguments.length) return _what;
+           _what = _;
+           return viewOnOSM;
+         };
 
-           _houseID = null;
-           var continueString = helpHtml('intro.buildings.continue_building') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_building');
-           revealHouse(house, continueString);
-           context.map().on('move.intro drawn.intro', function () {
-             revealHouse(house, continueString, {
-               duration: 0
-             });
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'draw-area') {
-               return;
-             } else if (mode.id === 'select') {
-               var graph = context.graph();
-               var way = context.entity(context.selectedIDs()[0]);
-               var nodes = graph.childNodes(way);
-               var points = utilArrayUniq(nodes).map(function (n) {
-                 return context.projection(n.loc);
-               });
+         return viewOnOSM;
+       }
 
-               if (isMostlySquare(points)) {
-                 _houseID = way.id;
-                 return continueTo(chooseCategoryBuilding);
-               } else {
-                 return continueTo(retryHouse);
-               }
-             } else {
-               return chapter.restart();
-             }
-           });
+       function uiInspector(context) {
+         var presetList = uiPresetList(context);
+         var entityEditor = uiEntityEditor(context);
+         var wrap = select(null),
+             presetPane = select(null),
+             editorPane = select(null);
+         var _state = 'select';
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+         var _entityIDs;
 
-         function retryHouse() {
-           var onClick = function onClick() {
-             continueTo(addHouse);
-           };
+         var _newFeature = false;
 
-           revealHouse(house, helpHtml('intro.buildings.retry_building'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: onClick
-           });
-           context.map().on('move.intro drawn.intro', function () {
-             revealHouse(house, helpHtml('intro.buildings.retry_building'), {
-               duration: 0,
-               buttonText: _t.html('intro.ok'),
-               buttonCallback: onClick
-             });
+         function inspector(selection) {
+           presetList.entityIDs(_entityIDs).autofocus(_newFeature).on('choose', inspector.setPreset).on('cancel', function () {
+             inspector.setPreset();
            });
+           entityEditor.state(_state).entityIDs(_entityIDs).on('choose', inspector.showList);
+           wrap = selection.selectAll('.panewrap').data([0]);
+           var enter = wrap.enter().append('div').attr('class', 'panewrap');
+           enter.append('div').attr('class', 'preset-list-pane pane');
+           enter.append('div').attr('class', 'entity-editor-pane pane');
+           wrap = wrap.merge(enter);
+           presetPane = wrap.selectAll('.preset-list-pane');
+           editorPane = wrap.selectAll('.entity-editor-pane');
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             nextStep();
-           }
-         }
-
-         function chooseCategoryBuilding() {
-           if (!_houseID || !context.hasEntity(_houseID)) {
-             return addHouse();
-           }
+           function shouldDefaultToPresetList() {
+             // always show the inspector on hover
+             if (_state !== 'select') return false; // can only change preset on single selection
 
-           var ids = context.selectedIDs();
+             if (_entityIDs.length !== 1) return false;
+             var entityID = _entityIDs[0];
+             var entity = context.hasEntity(entityID);
+             if (!entity) return false; // default to inspector if there are already tags
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-             context.enter(modeSelect(context, [_houseID]));
-           } // disallow scrolling
+             if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
 
+             if (_newFeature) return true; // all existing features except vertices should default to inspector
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-           timeout(function () {
-             // reset pane, in case user somehow happened to change it..
-             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-             var button = context.container().select('.preset-category-building .preset-list-button');
-             reveal(button.node(), helpHtml('intro.buildings.choose_category_building', {
-               category: buildingCatetory.name()
-             }));
-             button.on('click.intro', function () {
-               button.on('click.intro', null);
-               continueTo(choosePresetHouse);
-             });
-           }, 400); // after preset list pane visible..
+             if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
 
-           context.on('enter.intro', function (mode) {
-             if (!_houseID || !context.hasEntity(_houseID)) {
-               return continueTo(addHouse);
-             }
+             if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
 
-             var ids = context.selectedIDs();
+             if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-               return continueTo(chooseCategoryBuilding);
-             }
-           });
+             if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
 
-           function continueTo(nextStep) {
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.container().select('.preset-list-button').on('click.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+             return true;
            }
-         }
 
-         function choosePresetHouse() {
-           if (!_houseID || !context.hasEntity(_houseID)) {
-             return addHouse();
+           if (shouldDefaultToPresetList()) {
+             wrap.style('right', '-100%');
+             editorPane.classed('hide', true);
+             presetPane.classed('hide', false).call(presetList);
+           } else {
+             wrap.style('right', '0%');
+             presetPane.classed('hide', true);
+             editorPane.classed('hide', false).call(entityEditor);
            }
 
-           var ids = context.selectedIDs();
-
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-             context.enter(modeSelect(context, [_houseID]));
-           } // disallow scrolling
+           var footer = selection.selectAll('.footer').data([0]);
+           footer = footer.enter().append('div').attr('class', 'footer').merge(footer);
+           footer.call(uiViewOnOSM(context).what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0])));
+         }
 
+         inspector.showList = function (presets) {
+           presetPane.classed('hide', false);
+           wrap.transition().styleTween('right', function () {
+             return interpolate$1('0%', '-100%');
+           }).on('end', function () {
+             editorPane.classed('hide', true);
+           });
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-           timeout(function () {
-             // reset pane, in case user somehow happened to change it..
-             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-             var button = context.container().select('.preset-building-house .preset-list-button');
-             reveal(button.node(), helpHtml('intro.buildings.choose_preset_house', {
-               preset: housePreset.name()
-             }), {
-               duration: 300
-             });
-             button.on('click.intro', function () {
-               button.on('click.intro', null);
-               continueTo(closeEditorHouse);
-             });
-           }, 400); // after preset list pane visible..
+           if (presets) {
+             presetList.presets(presets);
+           }
 
-           context.on('enter.intro', function (mode) {
-             if (!_houseID || !context.hasEntity(_houseID)) {
-               return continueTo(addHouse);
-             }
+           presetPane.call(presetList.autofocus(true));
+         };
 
-             var ids = context.selectedIDs();
+         inspector.setPreset = function (preset) {
+           // upon setting multipolygon, go to the area preset list instead of the editor
+           if (preset && preset.id === 'type/multipolygon') {
+             presetPane.call(presetList.autofocus(true));
+           } else {
+             editorPane.classed('hide', false);
+             wrap.transition().styleTween('right', function () {
+               return interpolate$1('-100%', '0%');
+             }).on('end', function () {
+               presetPane.classed('hide', true);
+             });
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _houseID) {
-               return continueTo(chooseCategoryBuilding);
+             if (preset) {
+               entityEditor.presets([preset]);
              }
-           });
-
-           function continueTo(nextStep) {
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.container().select('.preset-list-button').on('click.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
 
-         function closeEditorHouse() {
-           if (!_houseID || !context.hasEntity(_houseID)) {
-             return addHouse();
+             editorPane.call(entityEditor);
            }
+         };
 
-           var ids = context.selectedIDs();
+         inspector.state = function (val) {
+           if (!arguments.length) return _state;
+           _state = val;
+           entityEditor.state(_state); // remove any old field help overlay that might have gotten attached to the inspector
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _houseID) {
-             context.enter(modeSelect(context, [_houseID]));
-           }
+           context.container().selectAll('.field-help-body').remove();
+           return inspector;
+         };
 
-           context.history().checkpoint('hasHouse');
-           context.on('exit.intro', function () {
-             continueTo(rightClickHouse);
-           });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
-               button: icon('#iD-icon-close', 'inline')
-             }));
-           }, 500);
+         inspector.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
+           _entityIDs = val;
+           return inspector;
+         };
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+         inspector.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return inspector;
+         };
 
-         function rightClickHouse() {
-           if (!_houseID) return chapter.restart();
-           context.enter(modeBrowse(context));
-           context.history().reset('hasHouse');
-           var zoom = context.map().zoom();
+         return inspector;
+       }
 
-           if (zoom < 20) {
-             zoom = 20;
-           }
+       function uiKeepRightDetails(context) {
+         var _qaItem;
 
-           context.map().centerZoomEase(house, zoom, 500);
-           context.on('enter.intro', function (mode) {
-             if (mode.id !== 'select') return;
-             var ids = context.selectedIDs();
-             if (ids.length !== 1 || ids[0] !== _houseID) return;
-             timeout(function () {
-               var node = selectMenuItem(context, 'orthogonalize').node();
-               if (!node) return;
-               continueTo(clickSquare);
-             }, 50); // after menu visible
-           });
-           context.map().on('move.intro drawn.intro', function () {
-             var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_building' : 'edit_menu_building_touch'));
-             revealHouse(house, rightclickString, {
-               duration: 0
-             });
-           });
-           context.history().on('change.intro', function () {
-             continueTo(rightClickHouse);
-           });
+         function issueDetail(d) {
+           var itemType = d.itemType,
+               parentIssueType = d.parentIssueType;
+           var unknown = _t.html('inspector.unknown');
+           var replacements = d.replacements || {};
+           replacements["default"] = unknown; // special key `default` works as a fallback string
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+           var detail = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".description"), replacements);
+
+           if (detail === unknown) {
+             detail = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".description"), replacements);
            }
+
+           return detail;
          }
 
-         function clickSquare() {
-           if (!_houseID) return chapter.restart();
-           var entity = context.hasEntity(_houseID);
-           if (!entity) return continueTo(rightClickHouse);
-           var node = selectMenuItem(context, 'orthogonalize').node();
+         function keepRightDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // description
 
-           if (!node) {
-             return continueTo(rightClickHouse);
-           }
+           var descriptionEnter = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           descriptionEnter.append('h4').call(_t.append('QA.keepRight.detail_description'));
+           descriptionEnter.append('div').attr('class', 'qa-details-description-text').html(issueDetail); // If there are entity links in the error message..
 
-           var wasChanged = false;
-           reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
-             padding: 50
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'browse') {
-               continueTo(rightClickHouse);
-             } else if (mode.id === 'move' || mode.id === 'rotate') {
-               continueTo(retryClickSquare);
-             }
-           });
-           context.map().on('move.intro', function () {
-             var node = selectMenuItem(context, 'orthogonalize').node();
+           var relatedEntities = [];
+           descriptionEnter.selectAll('.error_entity_link, .error_object_link').attr('href', '#').each(function () {
+             var link = select(this);
+             var isObjectLink = link.classed('error_object_link');
+             var entityID = isObjectLink ? utilEntityRoot(_qaItem.objectType) + _qaItem.objectId : this.textContent;
+             var entity = context.hasEntity(entityID);
+             relatedEntities.push(entityID); // Add click handler
 
-             if (!wasChanged && !node) {
-               return continueTo(rightClickHouse);
-             }
+             link.on('mouseenter', function () {
+               utilHighlightEntities([entityID], true, context);
+             }).on('mouseleave', function () {
+               utilHighlightEntities([entityID], false, context);
+             }).on('click', function (d3_event) {
+               d3_event.preventDefault();
+               utilHighlightEntities([entityID], false, context);
+               var osmlayer = context.layers().layer('osm');
 
-             reveal('.edit-menu', helpHtml('intro.buildings.square_building'), {
-               duration: 0,
-               padding: 50
-             });
-           });
-           context.history().on('change.intro', function () {
-             wasChanged = true;
-             context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
+               if (!osmlayer.enabled()) {
+                 osmlayer.enabled(true);
+               }
 
-             timeout(function () {
-               if (context.history().undoAnnotation() === _t('operations.orthogonalize.annotation.feature', {
-                 n: 1
-               })) {
-                 continueTo(doneSquare);
+               context.map().centerZoomEase(_qaItem.loc, 20);
+
+               if (entity) {
+                 context.enter(modeSelect(context, [entityID]));
                } else {
-                 continueTo(retryClickSquare);
+                 context.loadEntity(entityID, function (err, result) {
+                   if (err) return;
+                   var entity = result.data.find(function (e) {
+                     return e.id === entityID;
+                   });
+                   if (entity) context.enter(modeSelect(context, [entityID]));
+                 });
                }
-             }, 500); // after transitioned actions
-           });
-
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+             }); // Replace with friendly name if possible
+             // (The entity may not yet be loaded into the graph)
 
-         function retryClickSquare() {
-           context.enter(modeBrowse(context));
-           revealHouse(house, helpHtml('intro.buildings.retry_square'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(rightClickHouse);
-             }
-           });
+             if (entity) {
+               var name = utilDisplayName(entity); // try to use common name
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
-         }
+               if (!name && !isObjectLink) {
+                 var preset = _mainPresetIndex.match(entity, context.graph());
+                 name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+               }
 
-         function doneSquare() {
-           context.history().checkpoint('doneSquare');
-           revealHouse(house, helpHtml('intro.buildings.done_square'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(addTank);
+               if (name) {
+                 this.innerText = name;
+               }
              }
-           });
+           }); // Don't hide entities related to this issue - #5880
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
+           context.features().forceVisible(relatedEntities);
+           context.map().pan([0, 0]); // trigger a redraw
          }
 
-         function addTank() {
-           context.enter(modeBrowse(context));
-           context.history().reset('doneSquare');
-           _tankID = null;
-           var msec = transitionTime(tank, context.map().center());
-
-           if (msec) {
-             reveal(null, null, {
-               duration: 0
-             });
-           }
+         keepRightDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightDetails;
+         };
 
-           context.map().centerZoomEase(tank, 19.5, msec);
-           timeout(function () {
-             reveal('button.add-area', helpHtml('intro.buildings.add_tank'));
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'add-area') return;
-               continueTo(startTank);
-             });
-           }, msec + 100);
+         return keepRightDetails;
+       }
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             nextStep();
-           }
-         }
+       function uiKeepRightHeader() {
+         var _qaItem;
 
-         function startTank() {
-           if (context.mode().id !== 'add-area') {
-             return continueTo(addTank);
-           }
+         function issueTitle(d) {
+           var itemType = d.itemType,
+               parentIssueType = d.parentIssueType;
+           var unknown = _t.html('inspector.unknown');
+           var replacements = d.replacements || {};
+           replacements["default"] = unknown; // special key `default` works as a fallback string
 
-           _tankID = null;
-           timeout(function () {
-             var startString = helpHtml('intro.buildings.start_tank') + helpHtml('intro.buildings.tank_edge_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap'));
-             revealTank(tank, startString);
-             context.map().on('move.intro drawn.intro', function () {
-               revealTank(tank, startString, {
-                 duration: 0
-               });
-             });
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'draw-area') return chapter.restart();
-               continueTo(continueTank);
-             });
-           }, 550); // after easing
+           var title = _t.html("QA.keepRight.errorTypes.".concat(itemType, ".title"), replacements);
 
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
+           if (title === unknown) {
+             title = _t.html("QA.keepRight.errorTypes.".concat(parentIssueType, ".title"), replacements);
            }
-         }
 
-         function continueTank() {
-           if (context.mode().id !== 'draw-area') {
-             return continueTo(addTank);
-           }
+           return title;
+         }
 
-           _tankID = null;
-           var continueString = helpHtml('intro.buildings.continue_tank') + '{br}' + helpHtml('intro.areas.finish_area_' + (context.lastPointerType() === 'mouse' ? 'click' : 'tap')) + helpHtml('intro.buildings.finish_tank');
-           revealTank(tank, continueString);
-           context.map().on('move.intro drawn.intro', function () {
-             revealTank(tank, continueString, {
-               duration: 0
-             });
+         function keepRightHeader(selection) {
+           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
            });
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'draw-area') {
-               return;
-             } else if (mode.id === 'select') {
-               _tankID = context.selectedIDs()[0];
-               return continueTo(searchPresetTank);
-             } else {
-               return continueTo(addTank);
-             }
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+           var iconEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+             return d.id < 0;
            });
-
-           function continueTo(nextStep) {
-             context.map().on('move.intro drawn.intro', null);
-             context.on('enter.intro', null);
-             nextStep();
-           }
+           iconEnter.append('div').attr('class', function (d) {
+             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.parentIssueType);
+           }).call(svgIcon('#iD-icon-bolt', 'qaItem-fill'));
+           headerEnter.append('div').attr('class', 'qa-header-label').html(issueTitle);
          }
 
-         function searchPresetTank() {
-           if (!_tankID || !context.hasEntity(_tankID)) {
-             return addTank();
-           }
+         keepRightHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightHeader;
+         };
 
-           var ids = context.selectedIDs();
+         return keepRightHeader;
+       }
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-             context.enter(modeSelect(context, [_tankID]));
-           } // disallow scrolling
+       function uiViewOnKeepRight() {
+         var _qaItem;
 
+         function viewOnKeepRight(selection) {
+           var url;
 
-           context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-           timeout(function () {
-             // reset pane, in case user somehow happened to change it..
-             context.container().select('.inspector-wrap .panewrap').style('right', '-100%');
-             context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
-             reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
-               preset: tankPreset.name()
-             }));
-           }, 400); // after preset list pane visible..
+           if (services.keepRight && _qaItem instanceof QAItem) {
+             url = services.keepRight.issueURL(_qaItem);
+           }
 
-           context.on('enter.intro', function (mode) {
-             if (!_tankID || !context.hasEntity(_tankID)) {
-               return continueTo(addTank);
-             }
+           var link = selection.selectAll('.view-on-keepRight').data(url ? [url] : []); // exit
 
-             var ids = context.selectedIDs();
+           link.exit().remove(); // enter
 
-             if (mode.id !== 'select' || !ids.length || ids[0] !== _tankID) {
-               // keep the user's area selected..
-               context.enter(modeSelect(context, [_tankID])); // reset pane, in case user somehow happened to change it..
+           var linkEnter = link.enter().append('a').attr('class', 'view-on-keepRight').attr('target', '_blank').attr('rel', 'noopener') // security measure
+           .attr('href', function (d) {
+             return d;
+           }).call(svgIcon('#iD-icon-out-link', 'inline'));
+           linkEnter.append('span').call(_t.append('inspector.view_on_keepRight'));
+         }
 
-               context.container().select('.inspector-wrap .panewrap').style('right', '-100%'); // disallow scrolling
+         viewOnKeepRight.what = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return viewOnKeepRight;
+         };
 
-               context.container().select('.inspector-wrap').on('wheel.intro', eventCancel);
-               context.container().select('.preset-search-input').on('keydown.intro', null).on('keyup.intro', checkPresetSearch);
-               reveal('.preset-search-input', helpHtml('intro.buildings.search_tank', {
-                 preset: tankPreset.name()
-               }));
-               context.history().on('change.intro', null);
-             }
-           });
+         return viewOnKeepRight;
+       }
 
-           function checkPresetSearch() {
-             var first = context.container().select('.preset-list-item:first-child');
+       function uiKeepRightEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiKeepRightDetails(context);
+         var qaHeader = uiKeepRightHeader();
 
-             if (first.classed('preset-man_made-storage_tank')) {
-               reveal(first.select('.preset-list-button').node(), helpHtml('intro.buildings.choose_tank', {
-                 preset: tankPreset.name()
-               }), {
-                 duration: 300
-               });
-               context.container().select('.preset-search-input').on('keydown.intro', eventCancel, true).on('keyup.intro', null);
-               context.history().on('change.intro', function () {
-                 continueTo(closeEditorTank);
-               });
-             }
-           }
+         var _qaItem;
 
-           function continueTo(nextStep) {
-             context.container().select('.inspector-wrap').on('wheel.intro', null);
-             context.on('enter.intro', null);
-             context.history().on('change.intro', null);
-             context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-             nextStep();
-           }
+         function keepRightEditor(selection) {
+           var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+             return context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h2').call(_t.append('QA.keepRight.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.qa-editor').data([0]);
+           editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(keepRightSaveSection);
+           var footer = selection.selectAll('.footer').data([0]);
+           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnKeepRight().what(_qaItem));
          }
 
-         function closeEditorTank() {
-           if (!_tankID || !context.hasEntity(_tankID)) {
-             return addTank();
-           }
+         function keepRightSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           var ids = context.selectedIDs();
+           var isShown = _qaItem && (isSelected || _qaItem.newComment || _qaItem.comment);
+           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           }); // exit
 
-           if (context.mode().id !== 'select' || !ids.length || ids[0] !== _tankID) {
-             context.enter(modeSelect(context, [_tankID]));
-           }
+           saveSection.exit().remove(); // enter
 
-           context.history().checkpoint('hasTank');
-           context.on('exit.intro', function () {
-             continueTo(rightClickTank);
-           });
-           timeout(function () {
-             reveal('.entity-editor-pane', helpHtml('intro.buildings.close', {
-               button: icon('#iD-icon-close', 'inline')
-             }));
-           }, 500);
+           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf');
+           saveSectionEnter.append('h4').attr('class', '.qa-save-header').call(_t.append('QA.keepRight.comment'));
+           saveSectionEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('QA.keepRight.comment_placeholder')).attr('maxlength', 1000).property('value', function (d) {
+             return d.newComment || d.comment;
+           }).call(utilNoAuto).on('input', changeInput).on('blur', changeInput); // update
 
-           function continueTo(nextStep) {
-             context.on('exit.intro', null);
-             nextStep();
-           }
-         }
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
 
-         function rightClickTank() {
-           if (!_tankID) return continueTo(addTank);
-           context.enter(modeBrowse(context));
-           context.history().reset('hasTank');
-           context.map().centerEase(tank, 500);
-           timeout(function () {
-             context.on('enter.intro', function (mode) {
-               if (mode.id !== 'select') return;
-               var ids = context.selectedIDs();
-               if (ids.length !== 1 || ids[0] !== _tankID) return;
-               timeout(function () {
-                 var node = selectMenuItem(context, 'circularize').node();
-                 if (!node) return;
-                 continueTo(clickCircle);
-               }, 50); // after menu visible
-             });
-             var rightclickString = helpHtml('intro.buildings.' + (context.lastPointerType() === 'mouse' ? 'rightclick_tank' : 'edit_menu_tank_touch'));
-             revealTank(tank, rightclickString);
-             context.map().on('move.intro drawn.intro', function () {
-               revealTank(tank, rightclickString, {
-                 duration: 0
-               });
-             });
-             context.history().on('change.intro', function () {
-               continueTo(rightClickTank);
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim();
+
+             if (val === _qaItem.comment) {
+               val = undefined;
+             } // store the unsaved comment with the issue itself
+
+
+             _qaItem = _qaItem.update({
+               newComment: val
              });
-           }, 600);
+             var qaService = services.keepRight;
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro drawn.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
+             if (qaService) {
+               qaService.replaceItem(_qaItem); // update keepright cache
+             }
+
+             saveSection.call(qaSaveButtons);
            }
          }
 
-         function clickCircle() {
-           if (!_tankID) return chapter.restart();
-           var entity = context.hasEntity(_tankID);
-           if (!entity) return continueTo(rightClickTank);
-           var node = selectMenuItem(context, 'circularize').node();
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-           if (!node) {
-             return continueTo(rightClickTank);
-           }
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-           var wasChanged = false;
-           reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
-             padding: 50
-           });
-           context.on('enter.intro', function (mode) {
-             if (mode.id === 'browse') {
-               continueTo(rightClickTank);
-             } else if (mode.id === 'move' || mode.id === 'rotate') {
-               continueTo(retryClickCircle);
-             }
-           });
-           context.map().on('move.intro', function () {
-             var node = selectMenuItem(context, 'circularize').node();
+           buttonSection.exit().remove(); // enter
 
-             if (!wasChanged && !node) {
-               return continueTo(rightClickTank);
-             }
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+           buttonEnter.append('button').attr('class', 'button comment-button action').call(_t.append('QA.keepRight.save_comment'));
+           buttonEnter.append('button').attr('class', 'button close-button action');
+           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-             reveal('.edit-menu', helpHtml('intro.buildings.circle_tank'), {
-               duration: 0,
-               padding: 50
-             });
-           });
-           context.history().on('change.intro', function () {
-             wasChanged = true;
-             context.history().on('change.intro', null); // Something changed.  Wait for transition to complete and check undo annotation.
+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.select('.comment-button') // select and propagate data
+           .attr('disabled', function (d) {
+             return d.newComment ? null : true;
+           }).on('click.comment', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
 
-             timeout(function () {
-               if (context.history().undoAnnotation() === _t('operations.circularize.annotation.feature', {
-                 n: 1
-               })) {
-                 continueTo(play);
-               } else {
-                 continueTo(retryClickCircle);
-               }
-             }, 500); // after transitioned actions
+             var qaService = services.keepRight;
+
+             if (qaService) {
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
            });
+           buttonSection.select('.close-button') // select and propagate data
+           .html(function (d) {
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html("QA.keepRight.close".concat(andComment));
+           }).on('click.close', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
 
-           function continueTo(nextStep) {
-             context.on('enter.intro', null);
-             context.map().on('move.intro', null);
-             context.history().on('change.intro', null);
-             nextStep();
-           }
-         }
+             var qaService = services.keepRight;
+
+             if (qaService) {
+               d.newStatus = 'ignore_t'; // ignore temporarily (item fixed)
 
-         function retryClickCircle() {
-           context.enter(modeBrowse(context));
-           revealTank(tank, helpHtml('intro.buildings.retry_circle'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               continueTo(rightClickTank);
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
              }
            });
+           buttonSection.select('.ignore-button') // select and propagate data
+           .html(function (d) {
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html("QA.keepRight.ignore".concat(andComment));
+           }).on('click.ignore', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
 
-           function continueTo(nextStep) {
-             nextStep();
-           }
-         }
+             var qaService = services.keepRight;
 
-         function play() {
-           dispatch$1.call('done');
-           reveal('.ideditor', helpHtml('intro.buildings.play', {
-             next: _t('intro.startediting.title')
-           }), {
-             tooltipBox: '.intro-nav-wrap .chapter-startEditing',
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               reveal('.ideditor');
+             if (qaService) {
+               d.newStatus = 'ignore'; // ignore permanently (false positive)
+
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
              }
            });
+         } // NOTE: Don't change method name until UI v3 is merged
+
+
+         keepRightEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return keepRightEditor;
+         };
+
+         return utilRebind(keepRightEditor, dispatch, 'on');
+       }
+
+       function uiLasso(context) {
+         var group, polygon;
+         lasso.coordinates = [];
+
+         function lasso(selection) {
+           context.container().classed('lasso', true);
+           group = selection.append('g').attr('class', 'lasso hide');
+           polygon = group.append('path').attr('class', 'lasso-path');
+           group.call(uiToggle(true));
          }
 
-         chapter.enter = function () {
-           addHouse();
+         function draw() {
+           if (polygon) {
+             polygon.data([lasso.coordinates]).attr('d', function (d) {
+               return 'M' + d.join(' L') + ' Z';
+             });
+           }
+         }
+
+         lasso.extent = function () {
+           return lasso.coordinates.reduce(function (extent, point) {
+             return extent.extend(geoExtent(point));
+           }, geoExtent());
          };
 
-         chapter.exit = function () {
-           timeouts.forEach(window.clearTimeout);
-           context.on('enter.intro exit.intro', null);
-           context.map().on('move.intro drawn.intro', null);
-           context.history().on('change.intro', null);
-           context.container().select('.inspector-wrap').on('wheel.intro', null);
-           context.container().select('.preset-search-input').on('keydown.intro keyup.intro', null);
-           context.container().select('.more-fields .combobox-input').on('click.intro', null);
+         lasso.p = function (_) {
+           if (!arguments.length) return lasso;
+           lasso.coordinates.push(_);
+           draw();
+           return lasso;
          };
 
-         chapter.restart = function () {
-           chapter.exit();
-           chapter.enter();
+         lasso.close = function () {
+           if (group) {
+             group.call(uiToggle(false, function () {
+               select(this).remove();
+             }));
+           }
+
+           context.container().classed('lasso', false);
          };
 
-         return utilRebind(chapter, dispatch$1, 'on');
+         return lasso;
        }
 
-       function uiIntroStartEditing(context, reveal) {
-         var dispatch$1 = dispatch('done', 'startEditing');
-         var modalSelection = select(null);
-         var chapter = {
-           title: 'intro.startediting.title'
-         };
+       function uiNoteComments() {
+         var _note;
 
-         function showHelp() {
-           reveal('.map-control.help-control', helpHtml('intro.startediting.help'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               shortcuts();
+         function noteComments(selection) {
+           if (_note.isNew()) return; // don't draw .comments-container
+
+           var comments = selection.selectAll('.comments-container').data([0]);
+           comments = comments.enter().append('div').attr('class', 'comments-container').merge(comments);
+           var commentEnter = comments.selectAll('.comment').data(_note.comments).enter().append('div').attr('class', 'comment');
+           commentEnter.append('div').attr('class', function (d) {
+             return 'comment-avatar user-' + d.uid;
+           }).call(svgIcon('#iD-icon-avatar', 'comment-avatar-icon'));
+           var mainEnter = commentEnter.append('div').attr('class', 'comment-main');
+           var metadataEnter = mainEnter.append('div').attr('class', 'comment-metadata');
+           metadataEnter.append('div').attr('class', 'comment-author').each(function (d) {
+             var selection = select(this);
+             var osm = services.osm;
+
+             if (osm && d.user) {
+               selection = selection.append('a').attr('class', 'comment-author-link').attr('href', osm.userURL(d.user)).attr('target', '_blank');
              }
-           });
-         }
 
-         function shortcuts() {
-           reveal('.map-control.help-control', helpHtml('intro.startediting.shortcuts'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               showSave();
+             if (d.user) {
+               selection.text(d.user);
+             } else {
+               selection.call(_t.append('note.anonymous'));
              }
            });
+           metadataEnter.append('div').attr('class', 'comment-date').html(function (d) {
+             return _t.html('note.status.' + d.action, {
+               when: localeDateString(d.date)
+             });
+           });
+           mainEnter.append('div').attr('class', 'comment-text').html(function (d) {
+             return d.html;
+           }).selectAll('a').attr('rel', 'noopener nofollow').attr('target', '_blank');
+           comments.call(replaceAvatars);
          }
 
-         function showSave() {
-           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+         function replaceAvatars(selection) {
+           var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+           var osm = services.osm;
+           if (showThirdPartyIcons !== 'true' || !osm) return;
+           var uids = {}; // gather uids in the comment thread
 
-           reveal('.top-toolbar button.save', helpHtml('intro.startediting.save'), {
-             buttonText: _t.html('intro.ok'),
-             buttonCallback: function buttonCallback() {
-               showStart();
-             }
+           _note.comments.forEach(function (d) {
+             if (d.uid) uids[d.uid] = true;
            });
-         }
-
-         function showStart() {
-           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
 
-           modalSelection = uiModal(context.container());
-           modalSelection.select('.modal').attr('class', 'modal-splash modal');
-           modalSelection.selectAll('.close').remove();
-           var startbutton = modalSelection.select('.content').attr('class', 'fillL').append('button').attr('class', 'modal-section huge-modal-button').on('click', function () {
-             modalSelection.remove();
+           Object.keys(uids).forEach(function (uid) {
+             osm.loadUser(uid, function (err, user) {
+               if (!user || !user.image_url) return;
+               selection.selectAll('.comment-avatar.user-' + uid).html('').append('img').attr('class', 'icon comment-avatar-icon').attr('src', user.image_url).attr('alt', user.display_name);
+             });
            });
-           startbutton.append('svg').attr('class', 'illustration').append('use').attr('xlink:href', '#iD-logo-walkthrough');
-           startbutton.append('h2').html(_t.html('intro.startediting.start'));
-           dispatch$1.call('startEditing');
          }
 
-         chapter.enter = function () {
-           showHelp();
-         };
+         function localeDateString(s) {
+           if (!s) return null;
+           var options = {
+             day: 'numeric',
+             month: 'short',
+             year: 'numeric'
+           };
+           s = s.replace(/-/g, '/'); // fix browser-specific Date() issues
 
-         chapter.exit = function () {
-           modalSelection.remove();
-           context.container().selectAll('.shaded').remove(); // in case user opened keyboard shortcuts
+           var d = new Date(s);
+           if (isNaN(d.getTime())) return null;
+           return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+         }
+
+         noteComments.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteComments;
          };
 
-         return utilRebind(chapter, dispatch$1, 'on');
+         return noteComments;
        }
 
-       var chapterUi = {
-         welcome: uiIntroWelcome,
-         navigation: uiIntroNavigation,
-         point: uiIntroPoint,
-         area: uiIntroArea,
-         line: uiIntroLine,
-         building: uiIntroBuilding,
-         startEditing: uiIntroStartEditing
-       };
-       var chapterFlow = ['welcome', 'navigation', 'point', 'area', 'line', 'building', 'startEditing'];
-       function uiIntro(context) {
-         var INTRO_IMAGERY = 'EsriWorldImageryClarity';
-         var _introGraph = {};
+       function uiNoteHeader() {
+         var _note;
 
-         var _currChapter;
+         function noteHeader(selection) {
+           var header = selection.selectAll('.note-header').data(_note ? [_note] : [], function (d) {
+             return d.status + d.id;
+           });
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'note-header');
+           var iconEnter = headerEnter.append('div').attr('class', function (d) {
+             return 'note-header-icon ' + d.status;
+           }).classed('new', function (d) {
+             return d.id < 0;
+           });
+           iconEnter.append('div').attr('class', 'preset-icon-28').call(svgIcon('#iD-icon-note', 'note-fill'));
+           iconEnter.each(function (d) {
+             var statusIcon;
 
-         function intro(selection) {
-           _mainFileFetcher.get('intro_graph').then(function (dataIntroGraph) {
-             // create entities for intro graph and localize names
-             for (var id in dataIntroGraph) {
-               if (!_introGraph[id]) {
-                 _introGraph[id] = osmEntity(localize(dataIntroGraph[id]));
-               }
+             if (d.id < 0) {
+               statusIcon = '#iD-icon-plus';
+             } else if (d.status === 'open') {
+               statusIcon = '#iD-icon-close';
+             } else {
+               statusIcon = '#iD-icon-apply';
              }
 
-             selection.call(startIntro);
-           })["catch"](function () {
-             /* ignore */
+             iconEnter.append('div').attr('class', 'note-icon-annotation').attr('title', _t('icons.close')).call(svgIcon(statusIcon, 'icon-annotation'));
+           });
+           headerEnter.append('div').attr('class', 'note-header-label').html(function (d) {
+             if (_note.isNew()) {
+               return _t.html('note.new');
+             }
+
+             return _t.html('note.note') + ' ' + d.id + ' ' + (d.status === 'closed' ? _t.html('note.closed') : '');
            });
          }
 
-         function startIntro(selection) {
-           context.enter(modeBrowse(context)); // Save current map state
+         noteHeader.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteHeader;
+         };
 
-           var osm = context.connection();
-           var history = context.history().toJSON();
-           var hash = window.location.hash;
-           var center = context.map().center();
-           var zoom = context.map().zoom();
-           var background = context.background().baseLayerSource();
-           var overlays = context.background().overlayLayerSources();
-           var opacity = context.container().selectAll('.main-map .layer-background').style('opacity');
-           var caches = osm && osm.caches();
-           var baseEntities = context.history().graph().base().entities; // Show sidebar and disable the sidebar resizing button
-           // (this needs to be before `context.inIntro(true)`)
+         return noteHeader;
+       }
 
-           context.ui().sidebar.expand();
-           context.container().selectAll('button.sidebar-toggle').classed('disabled', true); // Block saving
+       function uiNoteReport() {
+         var _note;
 
-           context.inIntro(true); // Load semi-real data used in intro
+         function noteReport(selection) {
+           var url;
 
-           if (osm) {
-             osm.toggle(false).reset();
+           if (services.osm && _note instanceof osmNote && !_note.isNew()) {
+             url = services.osm.noteReportURL(_note);
            }
 
-           context.history().reset();
-           context.history().merge(Object.values(coreGraph().load(_introGraph).entities));
-           context.history().checkpoint('initial'); // Setup imagery
+           var link = selection.selectAll('.note-report').data(url ? [url] : []); // exit
 
-           var imagery = context.background().findSource(INTRO_IMAGERY);
+           link.exit().remove(); // enter
 
-           if (imagery) {
-             context.background().baseLayerSource(imagery);
-           } else {
-             context.background().bing();
-           }
+           var linkEnter = link.enter().append('a').attr('class', 'note-report').attr('target', '_blank').attr('href', function (d) {
+             return d;
+           }).call(svgIcon('#iD-icon-out-link', 'inline'));
+           linkEnter.append('span').call(_t.append('note.report'));
+         }
 
-           overlays.forEach(function (d) {
-             return context.background().toggleOverlayLayer(d);
-           }); // Setup data layers (only OSM)
+         noteReport.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteReport;
+         };
 
-           var layers = context.layers();
-           layers.all().forEach(function (item) {
-             // if the layer has the function `enabled`
-             if (typeof item.layer.enabled === 'function') {
-               item.layer.enabled(item.id === 'osm');
-             }
-           });
-           context.container().selectAll('.main-map .layer-background').style('opacity', 1);
-           var curtain = uiCurtain(context.container().node());
-           selection.call(curtain); // Store that the user started the walkthrough..
+         return noteReport;
+       }
 
-           corePreferences('walkthrough_started', 'yes'); // Restore previous walkthrough progress..
+       function uiNoteEditor(context) {
+         var dispatch = dispatch$8('change');
+         var noteComments = uiNoteComments();
+         var noteHeader = uiNoteHeader(); // var formFields = uiFormFields(context);
 
-           var storedProgress = corePreferences('walkthrough_progress') || '';
-           var progress = storedProgress.split(';').filter(Boolean);
-           var chapters = chapterFlow.map(function (chapter, i) {
-             var s = chapterUi[chapter](context, curtain.reveal).on('done', function () {
-               buttons.filter(function (d) {
-                 return d.title === s.title;
-               }).classed('finished', true);
+         var _note;
 
-               if (i < chapterFlow.length - 1) {
-                 var next = chapterFlow[i + 1];
-                 context.container().select("button.chapter-".concat(next)).classed('next', true);
-               } // Store walkthrough progress..
+         var _newNote; // var _fieldsArr;
 
 
-               progress.push(chapter);
-               corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';'));
+         function noteEditor(selection) {
+           var header = selection.selectAll('.header').data([0]);
+           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+             context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h2').call(_t.append('note.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.note-editor').data([0]);
+           editor.enter().append('div').attr('class', 'modal-section note-editor').merge(editor).call(noteHeader.note(_note)).call(noteComments.note(_note)).call(noteSaveSection);
+           var footer = selection.selectAll('.footer').data([0]);
+           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOSM(context).what(_note)).call(uiNoteReport().note(_note)); // rerender the note editor on any auth change
+
+           var osm = services.osm;
+
+           if (osm) {
+             osm.on('change.note-save', function () {
+               selection.call(noteEditor);
              });
-             return s;
+           }
+         }
+
+         function noteSaveSection(selection) {
+           var isSelected = _note && _note.id === context.selectedNoteID();
+
+           var noteSave = selection.selectAll('.note-save').data(isSelected ? [_note] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
+
+           noteSave.exit().remove(); // enter
+
+           var noteSaveEnter = noteSave.enter().append('div').attr('class', 'note-save save-section cf'); // // if new note, show categories to pick from
+           // if (_note.isNew()) {
+           //     var presets = presetManager;
+           //     // NOTE: this key isn't a age and therefore there is no documentation (yet)
+           //     _fieldsArr = [
+           //         uiField(context, presets.field('category'), null, { show: true, revert: false }),
+           //     ];
+           //     _fieldsArr.forEach(function(field) {
+           //         field
+           //             .on('change', changeCategory);
+           //     });
+           //     noteSaveEnter
+           //         .append('div')
+           //         .attr('class', 'note-category')
+           //         .call(formFields.fieldsArr(_fieldsArr));
+           // }
+           // function changeCategory() {
+           //     // NOTE: perhaps there is a better way to get value
+           //     var val = context.container().select('input[name=\'category\']:checked').property('__data__') || undefined;
+           //     // store the unsaved category with the note itself
+           //     _note = _note.update({ newCategory: val });
+           //     var osm = services.osm;
+           //     if (osm) {
+           //         osm.replaceNote(_note);  // update note cache
+           //     }
+           //     noteSave
+           //         .call(noteSaveButtons);
+           // }
+
+           noteSaveEnter.append('h4').attr('class', '.note-save-header').html(function () {
+             return _note.isNew() ? _t.html('note.newDescription') : _t.html('note.newComment');
            });
-           chapters[chapters.length - 1].on('startEditing', function () {
-             // Store walkthrough progress..
-             progress.push('startEditing');
-             corePreferences('walkthrough_progress', utilArrayUniq(progress).join(';')); // Store if walkthrough is completed..
+           var commentTextarea = noteSaveEnter.append('textarea').attr('class', 'new-comment-input').attr('placeholder', _t('note.inputPlaceholder')).attr('maxlength', 1000).property('value', function (d) {
+             return d.newComment;
+           }).call(utilNoAuto).on('keydown.note-input', keydown).on('input.note-input', changeInput).on('blur.note-input', changeInput);
 
-             var incomplete = utilArrayDifference(chapterFlow, progress);
+           if (!commentTextarea.empty() && _newNote) {
+             // autofocus the comment field for new notes
+             commentTextarea.node().focus();
+           } // update
 
-             if (!incomplete.length) {
-               corePreferences('walkthrough_completed', 'yes');
-             }
 
-             curtain.remove();
-             navwrap.remove();
-             context.container().selectAll('.main-map .layer-background').style('opacity', opacity);
-             context.container().selectAll('button.sidebar-toggle').classed('disabled', false);
+           noteSave = noteSaveEnter.merge(noteSave).call(userDetails).call(noteSaveButtons); // fast submit if user presses cmd+enter
 
-             if (osm) {
-               osm.toggle(true).reset().caches(caches);
-             }
+           function keydown(d3_event) {
+             if (!(d3_event.keyCode === 13 && // ↩ Return
+             d3_event.metaKey)) return;
+             var osm = services.osm;
+             if (!osm) return;
+             var hasAuth = osm.authenticated();
+             if (!hasAuth) return;
+             if (!_note.newComment) return;
+             d3_event.preventDefault();
+             select(this).on('keydown.note-input', null); // focus on button and submit
 
-             context.history().reset().merge(Object.values(baseEntities));
-             context.background().baseLayerSource(background);
-             overlays.forEach(function (d) {
-               return context.background().toggleOverlayLayer(d);
+             window.setTimeout(function () {
+               if (_note.isNew()) {
+                 noteSave.selectAll('.save-button').node().focus();
+                 clickSave();
+               } else {
+                 noteSave.selectAll('.comment-button').node().focus();
+                 clickComment();
+               }
+             }, 10);
+           }
+
+           function changeInput() {
+             var input = select(this);
+             var val = input.property('value').trim() || undefined; // store the unsaved comment with the note itself
+
+             _note = _note.update({
+               newComment: val
              });
+             var osm = services.osm;
 
-             if (history) {
-               context.history().fromJSON(history, false);
+             if (osm) {
+               osm.replaceNote(_note); // update note cache
              }
 
-             context.map().centerZoom(center, zoom);
-             window.location.replace(hash);
-             context.inIntro(false);
+             noteSave.call(noteSaveButtons);
+           }
+         }
+
+         function userDetails(selection) {
+           var detailSection = selection.selectAll('.detail-section').data([0]);
+           detailSection = detailSection.enter().append('div').attr('class', 'detail-section').merge(detailSection);
+           var osm = services.osm;
+           if (!osm) return; // Add warning if user is not logged in
+
+           var hasAuth = osm.authenticated();
+           var authWarning = detailSection.selectAll('.auth-warning').data(hasAuth ? [] : [0]);
+           authWarning.exit().transition().duration(200).style('opacity', 0).remove();
+           var authEnter = authWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning auth-warning').style('opacity', 0);
+           authEnter.call(svgIcon('#iD-icon-alert', 'inline'));
+           authEnter.append('span').call(_t.append('note.login'));
+           authEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append('login')).on('click.note-login', function (d3_event) {
+             d3_event.preventDefault();
+             osm.authenticate();
            });
-           var navwrap = selection.append('div').attr('class', 'intro-nav-wrap fillD');
-           navwrap.append('svg').attr('class', 'intro-nav-wrap-logo').append('use').attr('xlink:href', '#iD-logo-walkthrough');
-           var buttonwrap = navwrap.append('div').attr('class', 'joined').selectAll('button.chapter');
-           var buttons = buttonwrap.data(chapters).enter().append('button').attr('class', function (d, i) {
-             return "chapter chapter-".concat(chapterFlow[i]);
-           }).on('click', enterChapter);
-           buttons.append('span').html(function (d) {
-             return _t.html(d.title);
+           authEnter.transition().duration(200).style('opacity', 1);
+           var prose = detailSection.selectAll('.note-save-prose').data(hasAuth ? [0] : []);
+           prose.exit().remove();
+           prose = prose.enter().append('p').attr('class', 'note-save-prose').call(_t.append('note.upload_explanation')).merge(prose);
+           osm.userDetails(function (err, user) {
+             if (err) return;
+             var userLink = select(document.createElement('div'));
+
+             if (user.image_url) {
+               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
+             }
+
+             userLink.append('a').attr('class', 'user-info').text(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
+             prose.html(_t.html('note.upload_explanation_with_user', {
+               user: {
+                 html: userLink.html()
+               }
+             }));
            });
-           buttons.append('span').attr('class', 'status').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
-           enterChapter(null, chapters[0]);
+         }
+
+         function noteSaveButtons(selection) {
+           var osm = services.osm;
+           var hasAuth = osm && osm.authenticated();
+
+           var isSelected = _note && _note.id === context.selectedNoteID();
+
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_note] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
+
+           buttonSection.exit().remove(); // enter
+
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+
+           if (_note.isNew()) {
+             buttonEnter.append('button').attr('class', 'button cancel-button secondary-action').call(_t.append('confirm.cancel'));
+             buttonEnter.append('button').attr('class', 'button save-button action').call(_t.append('note.save'));
+           } else {
+             buttonEnter.append('button').attr('class', 'button status-button action');
+             buttonEnter.append('button').attr('class', 'button comment-button action').call(_t.append('note.comment'));
+           } // update
+
+
+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.select('.cancel-button') // select and propagate data
+           .on('click.cancel', clickCancel);
+           buttonSection.select('.save-button') // select and propagate data
+           .attr('disabled', isSaveDisabled).on('click.save', clickSave);
+           buttonSection.select('.status-button') // select and propagate data
+           .attr('disabled', hasAuth ? null : true).html(function (d) {
+             var action = d.status === 'open' ? 'close' : 'open';
+             var andComment = d.newComment ? '_comment' : '';
+             return _t.html('note.' + action + andComment);
+           }).on('click.status', clickStatus);
+           buttonSection.select('.comment-button') // select and propagate data
+           .attr('disabled', isSaveDisabled).on('click.comment', clickComment);
 
-           function enterChapter(d3_event, newChapter) {
-             if (_currChapter) {
-               _currChapter.exit();
-             }
+           function isSaveDisabled(d) {
+             return hasAuth && d.status === 'open' && d.newComment ? null : true;
+           }
+         }
 
-             context.enter(modeBrowse(context));
-             _currChapter = newChapter;
+         function clickCancel(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-             _currChapter.enter();
+           var osm = services.osm;
 
-             buttons.classed('next', false).classed('active', function (d) {
-               return d.title === _currChapter.title;
-             });
+           if (osm) {
+             osm.removeNote(d);
            }
-         }
 
-         return intro;
-       }
+           context.enter(modeBrowse(context));
+           dispatch.call('change');
+         }
 
-       function uiIssuesInfo(context) {
-         var warningsItem = {
-           id: 'warnings',
-           count: 0,
-           iconID: 'iD-icon-alert',
-           descriptionID: 'issues.warnings_and_errors'
-         };
-         var resolvedItem = {
-           id: 'resolved',
-           count: 0,
-           iconID: 'iD-icon-apply',
-           descriptionID: 'issues.user_resolved_issues'
-         };
+         function clickSave(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-         function update(selection) {
-           var shownItems = [];
-           var liveIssues = context.validator().getIssues({
-             what: corePreferences('validate-what') || 'edited',
-             where: corePreferences('validate-where') || 'all'
-           });
+           var osm = services.osm;
 
-           if (liveIssues.length) {
-             warningsItem.count = liveIssues.length;
-             shownItems.push(warningsItem);
+           if (osm) {
+             osm.postNoteCreate(d, function (err, note) {
+               dispatch.call('change', note);
+             });
            }
+         }
 
-           if (corePreferences('validate-what') === 'all') {
-             var resolvedIssues = context.validator().getResolvedIssues();
+         function clickStatus(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-             if (resolvedIssues.length) {
-               resolvedItem.count = resolvedIssues.length;
-               shownItems.push(resolvedItem);
-             }
+           var osm = services.osm;
+
+           if (osm) {
+             var setStatus = d.status === 'open' ? 'closed' : 'open';
+             osm.postNoteUpdate(d, setStatus, function (err, note) {
+               dispatch.call('change', note);
+             });
            }
+         }
 
-           var chips = selection.selectAll('.chip').data(shownItems, function (d) {
-             return d.id;
-           });
-           chips.exit().remove();
-           var enter = chips.enter().append('a').attr('class', function (d) {
-             return 'chip ' + d.id + '-count';
-           }).attr('href', '#').each(function (d) {
-             var chipSelection = select(this);
-             var tooltipBehavior = uiTooltip().placement('top').title(_t.html(d.descriptionID));
-             chipSelection.call(tooltipBehavior).on('click', function (d3_event) {
-               d3_event.preventDefault();
-               tooltipBehavior.hide(select(this)); // open the Issues pane
+         function clickComment(d3_event, d) {
+           this.blur(); // avoid keeping focus on the button - #4641
 
-               context.ui().togglePanes(context.container().select('.map-panes .issues-pane'));
+           var osm = services.osm;
+
+           if (osm) {
+             osm.postNoteUpdate(d, d.status, function (err, note) {
+               dispatch.call('change', note);
              });
-             chipSelection.call(svgIcon('#' + d.iconID));
-           });
-           enter.append('span').attr('class', 'count');
-           enter.merge(chips).selectAll('span.count').html(function (d) {
-             return d.count.toString();
-           });
+           }
          }
 
-         return function (selection) {
-           update(selection);
-           context.validator().on('validated.infobox', function () {
-             update(selection);
-           });
+         noteEditor.note = function (val) {
+           if (!arguments.length) return _note;
+           _note = val;
+           return noteEditor;
          };
-       }
 
-       function uiMapInMap(context) {
-         function mapInMap(selection) {
-           var backgroundLayer = rendererTileLayer(context);
-           var overlayLayers = {};
-           var projection = geoRawMercator();
-           var dataLayer = svgData(projection, context).showLabels(false);
-           var debugLayer = svgDebug(projection, context);
-           var zoom = d3_zoom().scaleExtent([geoZoomToScale(0.5), geoZoomToScale(24)]).on('start', zoomStarted).on('zoom', zoomed).on('end', zoomEnded);
-           var wrap = select(null);
-           var tiles = select(null);
-           var viewport = select(null);
-           var _isTransformed = false;
-           var _isHidden = true;
-           var _skipEvents = false;
-           var _gesture = null;
-           var _zDiff = 6; // by default, minimap renders at (main zoom - 6)
+         noteEditor.newNote = function (val) {
+           if (!arguments.length) return _newNote;
+           _newNote = val;
+           return noteEditor;
+         };
 
-           var _dMini; // dimensions of minimap
+         return utilRebind(noteEditor, dispatch, 'on');
+       }
 
+       function uiSourceSwitch(context) {
+         var keys;
 
-           var _cMini; // center pixel of minimap
+         function click(d3_event) {
+           d3_event.preventDefault();
+           var osm = context.connection();
+           if (!osm) return;
+           if (context.inIntro()) return;
+           if (context.history().hasChanges() && !window.confirm(_t('source_switch.lose_changes'))) return;
+           var isLive = select(this).classed('live');
+           isLive = !isLive;
+           context.enter(modeBrowse(context));
+           context.history().clearSaved(); // remove saved history
 
+           context.flush(); // remove stored data
 
-           var _tStart; // transform at start of gesture
+           select(this).html(isLive ? _t.html('source_switch.live') : _t.html('source_switch.dev')).classed('live', isLive).classed('chip', isLive);
+           osm["switch"](isLive ? keys[0] : keys[1]); // switch connection (warning: dispatches 'change' event)
+         }
 
+         var sourceSwitch = function sourceSwitch(selection) {
+           selection.append('a').attr('href', '#').call(_t.append('source_switch.live')).attr('class', 'live chip').on('click', click);
+         };
 
-           var _tCurr; // transform at most recent event
+         sourceSwitch.keys = function (_) {
+           if (!arguments.length) return keys;
+           keys = _;
+           return sourceSwitch;
+         };
 
+         return sourceSwitch;
+       }
 
-           var _timeoutID;
+       function uiSpinner(context) {
+         var osm = context.connection();
+         return function (selection) {
+           var img = selection.append('img').attr('src', context.imagePath('loader-black.gif')).style('opacity', 0);
 
-           function zoomStarted() {
-             if (_skipEvents) return;
-             _tStart = _tCurr = projection.transform();
-             _gesture = null;
+           if (osm) {
+             osm.on('loading.spinner', function () {
+               img.transition().style('opacity', 1);
+             }).on('loaded.spinner', function () {
+               img.transition().style('opacity', 0);
+             });
            }
+         };
+       }
 
-           function zoomed(d3_event) {
-             if (_skipEvents) return;
-             var x = d3_event.transform.x;
-             var y = d3_event.transform.y;
-             var k = d3_event.transform.k;
-             var isZooming = k !== _tStart.k;
-             var isPanning = x !== _tStart.x || y !== _tStart.y;
+       function uiSectionPrivacy(context) {
+         var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
 
-             if (!isZooming && !isPanning) {
-               return; // no change
-             } // lock in either zooming or panning, don't allow both in minimap.
+         function renderDisclosureContent(selection) {
+           // enter
+           selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
+           var thirdPartyIconsEnter = selection.select('.privacy-options-list').selectAll('.privacy-third-party-icons-item').data([corePreferences('preferences.privacy.thirdpartyicons') || 'true']).enter().append('li').attr('class', 'privacy-third-party-icons-item').append('label').call(uiTooltip().title(_t.html('preferences.privacy.third_party_icons.tooltip')).placement('bottom'));
+           thirdPartyIconsEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             d3_event.preventDefault();
+             corePreferences('preferences.privacy.thirdpartyicons', d === 'true' ? 'false' : 'true');
+           });
+           thirdPartyIconsEnter.append('span').call(_t.append('preferences.privacy.third_party_icons.description')); // update
 
+           selection.selectAll('.privacy-third-party-icons-item').classed('active', function (d) {
+             return d === 'true';
+           }).select('input').property('checked', function (d) {
+             return d === 'true';
+           }); // Privacy Policy link
 
-             if (!_gesture) {
-               _gesture = isZooming ? 'zoom' : 'pan';
-             }
+           selection.selectAll('.privacy-link').data([0]).enter().append('div').attr('class', 'privacy-link').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md').append('span').call(_t.append('preferences.privacy.privacy_link'));
+         }
 
-             var tMini = projection.transform();
-             var tX, tY, scale;
+         corePreferences.onChange('preferences.privacy.thirdpartyicons', section.reRender);
+         return section;
+       }
 
-             if (_gesture === 'zoom') {
-               scale = k / tMini.k;
-               tX = (_cMini[0] / scale - _cMini[0]) * scale;
-               tY = (_cMini[1] / scale - _cMini[1]) * scale;
-             } else {
-               k = tMini.k;
-               scale = 1;
-               tX = x - tMini.x;
-               tY = y - tMini.y;
-             }
+       function uiSplash(context) {
+         return function (selection) {
+           // Exception - if there are restorable changes, skip this splash screen.
+           // This is because we currently only support one `uiModal` at a time
+           //  and we need to show them `uiRestore`` instead of this one.
+           if (context.history().hasRestorableChanges()) return; // If user has not seen this version of the privacy policy, show the splash again.
 
-             utilSetTransform(tiles, tX, tY, scale);
-             utilSetTransform(viewport, 0, 0, scale);
-             _isTransformed = true;
-             _tCurr = identity$2.translate(x, y).scale(k);
-             var zMain = geoScaleToZoom(context.projection.scale());
-             var zMini = geoScaleToZoom(k);
-             _zDiff = zMain - zMini;
-             queueRedraw();
-           }
+           var updateMessage = '';
+           var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
+           var showSplash = !corePreferences('sawSplash');
 
-           function zoomEnded() {
-             if (_skipEvents) return;
-             if (_gesture !== 'pan') return;
-             updateProjection();
-             _gesture = null;
-             context.map().center(projection.invert(_cMini)); // recenter main map..
+           if (sawPrivacyVersion !== context.privacyVersion) {
+             updateMessage = _t('splash.privacy_update');
+             showSplash = true;
            }
 
-           function updateProjection() {
-             var loc = context.map().center();
-             var tMain = context.projection.transform();
-             var zMain = geoScaleToZoom(tMain.k);
-             var zMini = Math.max(zMain - _zDiff, 0.5);
-             var kMini = geoZoomToScale(zMini);
-             projection.translate([tMain.x, tMain.y]).scale(kMini);
-             var point = projection(loc);
-             var mouse = _gesture === 'pan' ? geoVecSubtract([_tCurr.x, _tCurr.y], [_tStart.x, _tStart.y]) : [0, 0];
-             var xMini = _cMini[0] - point[0] + tMain.x + mouse[0];
-             var yMini = _cMini[1] - point[1] + tMain.y + mouse[1];
-             projection.translate([xMini, yMini]).clipExtent([[0, 0], _dMini]);
-             _tCurr = projection.transform();
+           if (!showSplash) return;
+           corePreferences('sawSplash', true);
+           corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
 
-             if (_isTransformed) {
-               utilSetTransform(tiles, 0, 0);
-               utilSetTransform(viewport, 0, 0);
-               _isTransformed = false;
+           _mainFileFetcher.get('intro_graph');
+           var modalSelection = uiModal(selection);
+           modalSelection.select('.modal').attr('class', 'modal-splash modal');
+           var introModal = modalSelection.select('.content').append('div').attr('class', 'fillL');
+           introModal.append('div').attr('class', 'modal-section').append('h3').call(_t.append('splash.welcome'));
+           var modalSection = introModal.append('div').attr('class', 'modal-section');
+           modalSection.append('p').html(_t.html('splash.text', {
+             version: context.version,
+             website: {
+               html: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/develop/CHANGELOG.md#whats-new">changelog</a>'
+             },
+             github: {
+               html: '<a target="_blank" href="https://github.com/openstreetmap/iD/issues">github.com</a>'
+             }
+           }));
+           modalSection.append('p').html(_t.html('splash.privacy', {
+             updateMessage: updateMessage,
+             privacyLink: {
+               html: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' + _t('splash.privacy_policy') + '</a>'
              }
+           }));
+           uiSectionPrivacy(context).label(_t.html('splash.privacy_settings')).render(modalSection);
+           var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
+           var walkthrough = buttonWrap.append('button').attr('class', 'walkthrough').on('click', function () {
+             context.container().call(uiIntro(context));
+             modalSelection.close();
+           });
+           walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           walkthrough.append('div').call(_t.append('splash.walkthrough'));
+           var startEditing = buttonWrap.append('button').attr('class', 'start-editing').on('click', modalSelection.close);
+           startEditing.append('svg').attr('class', 'logo logo-features').append('use').attr('xlink:href', '#iD-logo-features');
+           startEditing.append('div').call(_t.append('splash.start'));
+           modalSelection.select('button.close').attr('class', 'hide');
+         };
+       }
 
-             zoom.scaleExtent([geoZoomToScale(0.5), geoZoomToScale(zMain - 3)]);
-             _skipEvents = true;
-             wrap.call(zoom.transform, _tCurr);
-             _skipEvents = false;
-           }
+       function uiStatus(context) {
+         var osm = context.connection();
+         return function (selection) {
+           if (!osm) return;
 
-           function redraw() {
-             clearTimeout(_timeoutID);
-             if (_isHidden) return;
-             updateProjection();
-             var zMini = geoScaleToZoom(projection.scale()); // setup tile container
+           function update(err, apiStatus) {
+             selection.html('');
 
-             tiles = wrap.selectAll('.map-in-map-tiles').data([0]);
-             tiles = tiles.enter().append('div').attr('class', 'map-in-map-tiles').merge(tiles); // redraw background
+             if (err) {
+               if (apiStatus === 'connectionSwitched') {
+                 // if the connection was just switched, we can't rely on
+                 // the status (we're getting the status of the previous api)
+                 return;
+               } else if (apiStatus === 'rateLimited') {
+                 selection.call(_t.append('osm_api_status.message.rateLimit')).append('a').attr('href', '#').attr('class', 'api-status-login').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append('login')).on('click.login', function (d3_event) {
+                   d3_event.preventDefault();
+                   osm.authenticate();
+                 });
+               } else {
+                 // don't allow retrying too rapidly
+                 var throttledRetry = throttle(function () {
+                   // try loading the visible tiles
+                   context.loadTiles(context.projection); // manually reload the status too in case all visible tiles were already loaded
 
-             backgroundLayer.source(context.background().baseLayerSource()).projection(projection).dimensions(_dMini);
-             var background = tiles.selectAll('.map-in-map-background').data([0]);
-             background.enter().append('div').attr('class', 'map-in-map-background').merge(background).call(backgroundLayer); // redraw overlay
+                   osm.reloadApiStatus();
+                 }, 2000); // eslint-disable-next-line no-warning-comments
+                 // TODO: nice messages for different error types
 
-             var overlaySources = context.background().overlayLayerSources();
-             var activeOverlayLayers = [];
 
-             for (var i = 0; i < overlaySources.length; i++) {
-               if (overlaySources[i].validZoom(zMini)) {
-                 if (!overlayLayers[i]) overlayLayers[i] = rendererTileLayer(context);
-                 activeOverlayLayers.push(overlayLayers[i].source(overlaySources[i]).projection(projection).dimensions(_dMini));
+                 selection.call(_t.append('osm_api_status.message.error', {
+                   suffix: ' '
+                 })).append('a').attr('href', '#') // let the user manually retry their connection directly
+                 .call(_t.append('osm_api_status.retry')).on('click.retry', function (d3_event) {
+                   d3_event.preventDefault();
+                   throttledRetry();
+                 });
                }
+             } else if (apiStatus === 'readonly') {
+               selection.call(_t.append('osm_api_status.message.readonly'));
+             } else if (apiStatus === 'offline') {
+               selection.call(_t.append('osm_api_status.message.offline'));
              }
 
-             var overlay = tiles.selectAll('.map-in-map-overlay').data([0]);
-             overlay = overlay.enter().append('div').attr('class', 'map-in-map-overlay').merge(overlay);
-             var overlays = overlay.selectAll('div').data(activeOverlayLayers, function (d) {
-               return d.source().name();
-             });
-             overlays.exit().remove();
-             overlays = overlays.enter().append('div').merge(overlays).each(function (layer) {
-               select(this).call(layer);
-             });
-             var dataLayers = tiles.selectAll('.map-in-map-data').data([0]);
-             dataLayers.exit().remove();
-             dataLayers = dataLayers.enter().append('svg').attr('class', 'map-in-map-data').merge(dataLayers).call(dataLayer).call(debugLayer); // redraw viewport bounding box
-
-             if (_gesture !== 'pan') {
-               var getPath = d3_geoPath(projection);
-               var bbox = {
-                 type: 'Polygon',
-                 coordinates: [context.map().extent().polygon()]
-               };
-               viewport = wrap.selectAll('.map-in-map-viewport').data([0]);
-               viewport = viewport.enter().append('svg').attr('class', 'map-in-map-viewport').merge(viewport);
-               var path = viewport.selectAll('.map-in-map-bbox').data([bbox]);
-               path.enter().append('path').attr('class', 'map-in-map-bbox').merge(path).attr('d', getPath).classed('thick', function (d) {
-                 return getPath.area(d) < 30;
-               });
-             }
-           }
-
-           function queueRedraw() {
-             clearTimeout(_timeoutID);
-             _timeoutID = setTimeout(function () {
-               redraw();
-             }, 750);
-           }
-
-           function toggle(d3_event) {
-             if (d3_event) d3_event.preventDefault();
-             _isHidden = !_isHidden;
-             context.container().select('.minimap-toggle-item').classed('active', !_isHidden).select('input').property('checked', !_isHidden);
-
-             if (_isHidden) {
-               wrap.style('display', 'block').style('opacity', '1').transition().duration(200).style('opacity', '0').on('end', function () {
-                 selection.selectAll('.map-in-map').style('display', 'none');
-               });
-             } else {
-               wrap.style('display', 'block').style('opacity', '0').transition().duration(200).style('opacity', '1').on('end', function () {
-                 redraw();
-               });
-             }
+             selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
            }
 
-           uiMapInMap.toggle = toggle;
-           wrap = selection.selectAll('.map-in-map').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'map-in-map').style('display', _isHidden ? 'none' : 'block').call(zoom).on('dblclick.zoom', null).merge(wrap); // reflow warning: Hardcode dimensions - currently can't resize it anyway..
-
-           _dMini = [200, 150]; //utilGetDimensions(wrap);
+           osm.on('apiStatusChange.uiStatus', update);
+           context.history().on('storage_error', function () {
+             selection.call(_t.append('osm_api_status.message.local_storage_full'));
+             selection.attr('class', 'api-status error');
+           }); // reload the status periodically regardless of other factors
 
-           _cMini = geoVecScale(_dMini, 0.5);
-           context.map().on('drawn.map-in-map', function (drawn) {
-             if (drawn.full === true) {
-               redraw();
-             }
-           });
-           redraw();
-           context.keybinding().on(_t('background.minimap.key'), toggle);
-         }
+           window.setInterval(function () {
+             osm.reloadApiStatus();
+           }, 90000); // load the initial status in case no OSM data was loaded yet
 
-         return mapInMap;
+           osm.reloadApiStatus();
+         };
        }
 
-       function uiNotice(context) {
-         return function (selection) {
-           var div = selection.append('div').attr('class', 'notice');
-           var button = div.append('button').attr('class', 'zoom-to notice fillD').on('click', function () {
-             context.map().zoomEase(context.minEditableZoom());
-           }).on('wheel', function (d3_event) {
-             // let wheel events pass through #4482
-             var e2 = new WheelEvent(d3_event.type, d3_event);
-             context.surface().node().dispatchEvent(e2);
-           });
-           button.call(svgIcon('#iD-icon-plus', 'pre-text')).append('span').attr('class', 'label').html(_t.html('zoom_in_edit'));
-
-           function disableTooHigh() {
-             var canEdit = context.map().zoom() >= context.minEditableZoom();
-             div.style('display', canEdit ? 'none' : 'block');
-           }
+       // for punction see https://stackoverflow.com/a/21224179
 
-           context.map().on('move.notice', debounce(disableTooHigh, 500));
-           disableTooHigh();
-         };
+       function simplify(str) {
+         if (typeof str !== 'string') return '';
+         return diacritics.remove(str.replace(/&/g, 'and').replace(/İ/ig, 'i').replace(/[\s\-=_!"#%'*{},.\/:;?\(\)\[\]@\\$\^*+<>«»~`’\u00a1\u00a7\u00b6\u00b7\u00bf\u037e\u0387\u055a-\u055f\u0589\u05c0\u05c3\u05c6\u05f3\u05f4\u0609\u060a\u060c\u060d\u061b\u061e\u061f\u066a-\u066d\u06d4\u0700-\u070d\u07f7-\u07f9\u0830-\u083e\u085e\u0964\u0965\u0970\u0af0\u0df4\u0e4f\u0e5a\u0e5b\u0f04-\u0f12\u0f14\u0f85\u0fd0-\u0fd4\u0fd9\u0fda\u104a-\u104f\u10fb\u1360-\u1368\u166d\u166e\u16eb-\u16ed\u1735\u1736\u17d4-\u17d6\u17d8-\u17da\u1800-\u1805\u1807-\u180a\u1944\u1945\u1a1e\u1a1f\u1aa0-\u1aa6\u1aa8-\u1aad\u1b5a-\u1b60\u1bfc-\u1bff\u1c3b-\u1c3f\u1c7e\u1c7f\u1cc0-\u1cc7\u1cd3\u200b-\u200f\u2016\u2017\u2020-\u2027\u2030-\u2038\u203b-\u203e\u2041-\u2043\u2047-\u2051\u2053\u2055-\u205e\u2cf9-\u2cfc\u2cfe\u2cff\u2d70\u2e00\u2e01\u2e06-\u2e08\u2e0b\u2e0e-\u2e16\u2e18\u2e19\u2e1b\u2e1e\u2e1f\u2e2a-\u2e2e\u2e30-\u2e39\u3001-\u3003\u303d\u30fb\ua4fe\ua4ff\ua60d-\ua60f\ua673\ua67e\ua6f2-\ua6f7\ua874-\ua877\ua8ce\ua8cf\ua8f8-\ua8fa\ua92e\ua92f\ua95f\ua9c1-\ua9cd\ua9de\ua9df\uaa5c-\uaa5f\uaade\uaadf\uaaf0\uaaf1\uabeb\ufe10-\ufe16\ufe19\ufe30\ufe45\ufe46\ufe49-\ufe4c\ufe50-\ufe52\ufe54-\ufe57\ufe5f-\ufe61\ufe68\ufe6a\ufe6b\ufeff\uff01-\uff03\uff05-\uff07\uff0a\uff0c\uff0e\uff0f\uff1a\uff1b\uff1f\uff20\uff3c\uff61\uff64\uff65]+/g, '').toLowerCase());
        }
 
-       function uiPhotoviewer(context) {
-         var dispatch$1 = dispatch('resize');
-
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+       // `resolveStrings`
+       // Resolves the text strings for a given community index item
+       //
+       // Arguments
+       //   `item`:  Object containing the community index item
+       //   `defaults`: Object containing the community index default strings
+       //   `localizerFn?`: optional function we will call to do the localization.
+       //      This function should be like the iD `t()` function that
+       //      accepts a `stringID` and returns a localized string
+       //
+       // Returns
+       //   An Object containing all the resolved strings:
+       //   {
+       //     name:                     'talk-ru Mailing List',
+       //     url:                      'https://lists.openstreetmap.org/listinfo/talk-ru',
+       //     signupUrl:                'https://example.url/signup',
+       //     description:              'A one line description',
+       //     extendedDescription:      'Extended description',
+       //     nameHTML:                 '<a href="the url">the name</a>',
+       //     urlHTML:                  '<a href="the url">the url</a>',
+       //     signupUrlHTML:            '<a href="the signupUrl">the signupUrl</a>',
+       //     descriptionHTML:          the description, with urls and signupUrls linkified,
+       //     extendedDescriptionHTML:  the extendedDescription with urls and signupUrls linkified
+       //   }
+       //
 
-         function photoviewer(selection) {
-           selection.append('button').attr('class', 'thumb-hide').on('click', function () {
-             if (services.streetside) {
-               services.streetside.hideViewer(context);
-             }
+       function resolveStrings(item, defaults, localizerFn) {
+         var itemStrings = Object.assign({}, item.strings); // shallow clone
 
-             if (services.mapillary) {
-               services.mapillary.hideViewer(context);
-             }
+         var defaultStrings = Object.assign({}, defaults[item.type]); // shallow clone
 
-             if (services.openstreetcam) {
-               services.openstreetcam.hideViewer(context);
-             }
-           }).append('div').call(svgIcon('#iD-icon-close'));
+         var anyToken = new RegExp(/(\{\w+\})/, 'gi'); // Pre-localize the item and default strings
 
-           function preventDefault(d3_event) {
-             d3_event.preventDefault();
+         if (localizerFn) {
+           if (itemStrings.community) {
+             var communityID = simplify(itemStrings.community);
+             itemStrings.community = localizerFn("_communities.".concat(communityID));
            }
 
-           selection.append('button').attr('class', 'resize-handle-xy').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch$1, {
-             resizeOnX: true,
-             resizeOnY: true
-           }));
-           selection.append('button').attr('class', 'resize-handle-x').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch$1, {
-             resizeOnX: true
-           }));
-           selection.append('button').attr('class', 'resize-handle-y').on('touchstart touchdown touchend', preventDefault).on(_pointerPrefix + 'down', buildResizeListener(selection, 'resize', dispatch$1, {
-             resizeOnY: true
-           }));
-
-           function buildResizeListener(target, eventName, dispatch, options) {
-             var resizeOnX = !!options.resizeOnX;
-             var resizeOnY = !!options.resizeOnY;
-             var minHeight = options.minHeight || 240;
-             var minWidth = options.minWidth || 320;
-             var pointerId;
-             var startX;
-             var startY;
-             var startWidth;
-             var startHeight;
+           ['name', 'description', 'extendedDescription'].forEach(function (prop) {
+             if (defaultStrings[prop]) defaultStrings[prop] = localizerFn("_defaults.".concat(item.type, ".").concat(prop));
+             if (itemStrings[prop]) itemStrings[prop] = localizerFn("".concat(item.id, ".").concat(prop));
+           });
+         }
 
-             function startResize(d3_event) {
-               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
-               d3_event.preventDefault();
-               d3_event.stopPropagation();
-               var mapSize = context.map().dimensions();
+         var replacements = {
+           account: item.account,
+           community: itemStrings.community,
+           signupUrl: itemStrings.signupUrl,
+           url: itemStrings.url
+         }; // Resolve URLs first (which may refer to {account})
 
-               if (resizeOnX) {
-                 var maxWidth = mapSize[0];
-                 var newWidth = clamp(startWidth + d3_event.clientX - startX, minWidth, maxWidth);
-                 target.style('width', newWidth + 'px');
-               }
+         if (!replacements.signupUrl) {
+           replacements.signupUrl = resolve(itemStrings.signupUrl || defaultStrings.signupUrl);
+         }
 
-               if (resizeOnY) {
-                 var maxHeight = mapSize[1] - 90; // preserve space at top/bottom of map
+         if (!replacements.url) {
+           replacements.url = resolve(itemStrings.url || defaultStrings.url);
+         }
 
-                 var newHeight = clamp(startHeight + startY - d3_event.clientY, minHeight, maxHeight);
-                 target.style('height', newHeight + 'px');
-               }
+         var resolved = {
+           name: resolve(itemStrings.name || defaultStrings.name),
+           url: resolve(itemStrings.url || defaultStrings.url),
+           signupUrl: resolve(itemStrings.signupUrl || defaultStrings.signupUrl),
+           description: resolve(itemStrings.description || defaultStrings.description),
+           extendedDescription: resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription)
+         }; // Generate linkified strings
 
-               dispatch.call(eventName, target, utilGetDimensions(target, true));
-             }
+         resolved.nameHTML = linkify(resolved.url, resolved.name);
+         resolved.urlHTML = linkify(resolved.url);
+         resolved.signupUrlHTML = linkify(resolved.signupUrl);
+         resolved.descriptionHTML = resolve(itemStrings.description || defaultStrings.description, true);
+         resolved.extendedDescriptionHTML = resolve(itemStrings.extendedDescription || defaultStrings.extendedDescription, true);
+         return resolved;
 
-             function clamp(num, min, max) {
-               return Math.max(min, Math.min(num, max));
-             }
+         function resolve(s, addLinks) {
+           if (!s) return undefined;
+           var result = s;
 
-             function stopResize(d3_event) {
-               if (pointerId !== (d3_event.pointerId || 'mouse')) return;
-               d3_event.preventDefault();
-               d3_event.stopPropagation(); // remove all the listeners we added
+           for (var key in replacements) {
+             var token = "{".concat(key, "}");
+             var regex = new RegExp(token, 'g');
 
-               select(window).on('.' + eventName, null);
-             }
+             if (regex.test(result)) {
+               var replacement = replacements[key];
 
-             return function initResize(d3_event) {
-               d3_event.preventDefault();
-               d3_event.stopPropagation();
-               pointerId = d3_event.pointerId || 'mouse';
-               startX = d3_event.clientX;
-               startY = d3_event.clientY;
-               var targetRect = target.node().getBoundingClientRect();
-               startWidth = targetRect.width;
-               startHeight = targetRect.height;
-               select(window).on(_pointerPrefix + 'move.' + eventName, startResize, false).on(_pointerPrefix + 'up.' + eventName, stopResize, false);
+               if (!replacement) {
+                 throw new Error("Cannot resolve token: ".concat(token));
+               } else {
+                 if (addLinks && (key === 'signupUrl' || key === 'url')) {
+                   replacement = linkify(replacement);
+                 }
 
-               if (_pointerPrefix === 'pointer') {
-                 select(window).on('pointercancel.' + eventName, stopResize, false);
+                 result = result.replace(regex, replacement);
                }
-             };
-           }
-         }
-
-         photoviewer.onMapResize = function () {
-           var photoviewer = context.container().select('.photoviewer');
-           var content = context.container().select('.main-content');
-           var mapDimensions = utilGetDimensions(content, true); // shrink photo viewer if it is too big
-           // (-90 preserves space at top and bottom of map used by menus)
+             }
+           } // There shouldn't be any leftover tokens in a resolved string
 
-           var photoDimensions = utilGetDimensions(photoviewer, true);
 
-           if (photoDimensions[0] > mapDimensions[0] || photoDimensions[1] > mapDimensions[1] - 90) {
-             var setPhotoDimensions = [Math.min(photoDimensions[0], mapDimensions[0]), Math.min(photoDimensions[1], mapDimensions[1] - 90)];
-             photoviewer.style('width', setPhotoDimensions[0] + 'px').style('height', setPhotoDimensions[1] + 'px');
-             dispatch$1.call('resize', photoviewer, setPhotoDimensions);
+           var leftovers = result.match(anyToken);
+
+           if (leftovers) {
+             throw new Error("Cannot resolve tokens: ".concat(leftovers));
+           } // Linkify subreddits like `/r/openstreetmap`
+           // https://github.com/osmlab/osm-community-index/issues/82
+           // https://github.com/openstreetmap/iD/issues/4997
+
+
+           if (addLinks && item.type === 'reddit') {
+             result = result.replace(/(\/r\/\w+\/*)/i, function (match) {
+               return linkify(resolved.url, match);
+             });
            }
-         };
 
-         return utilRebind(photoviewer, dispatch$1, 'on');
-       }
+           return result;
+         }
 
-       function uiRestore(context) {
-         return function (selection) {
-           if (!context.history().hasRestorableChanges()) return;
-           var modalSelection = uiModal(selection, true);
-           modalSelection.select('.modal').attr('class', 'modal fillL');
-           var introModal = modalSelection.select('.content');
-           introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('restore.heading'));
-           introModal.append('div').attr('class', 'modal-section').append('p').html(_t.html('restore.description'));
-           var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
-           var restore = buttonWrap.append('button').attr('class', 'restore').on('click', function () {
-             context.history().restore();
-             modalSelection.remove();
-           });
-           restore.append('svg').attr('class', 'logo logo-restore').append('use').attr('xlink:href', '#iD-logo-restore');
-           restore.append('div').html(_t.html('restore.restore'));
-           var reset = buttonWrap.append('button').attr('class', 'reset').on('click', function () {
-             context.history().clearSaved();
-             modalSelection.remove();
-           });
-           reset.append('svg').attr('class', 'logo logo-reset').append('use').attr('xlink:href', '#iD-logo-reset');
-           reset.append('div').html(_t.html('restore.reset'));
-           restore.node().focus();
-         };
+         function linkify(url, text) {
+           if (!url) return undefined;
+           text = text || url;
+           return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
+         }
        }
 
-       function uiScale(context) {
-         var projection = context.projection,
-             isImperial = !_mainLocalizer.usesMetric(),
-             maxLength = 180,
-             tickHeight = 8;
+       var _oci = null;
+       function uiSuccess(context) {
+         var MAXEVENTS = 2;
+         var dispatch = dispatch$8('cancel');
 
-         function scaleDefs(loc1, loc2) {
-           var lat = (loc2[1] + loc1[1]) / 2,
-               conversion = isImperial ? 3.28084 : 1,
-               dist = geoLonToMeters(loc2[0] - loc1[0], lat) * conversion,
-               scale = {
-             dist: 0,
-             px: 0,
-             text: ''
-           },
-               buckets,
-               i,
-               val,
-               dLon;
+         var _changeset;
 
-           if (isImperial) {
-             buckets = [5280000, 528000, 52800, 5280, 500, 50, 5, 1];
-           } else {
-             buckets = [5000000, 500000, 50000, 5000, 500, 50, 5, 1];
-           } // determine a user-friendly endpoint for the scale
+         var _location;
 
+         ensureOSMCommunityIndex(); // start fetching the data
 
-           for (i = 0; i < buckets.length; i++) {
-             val = buckets[i];
+         function ensureOSMCommunityIndex() {
+           var data = _mainFileFetcher;
+           return Promise.all([data.get('oci_features'), data.get('oci_resources'), data.get('oci_defaults')]).then(function (vals) {
+             if (_oci) return _oci; // Merge Custom Features
 
-             if (dist >= val) {
-               scale.dist = Math.floor(dist / val) * val;
-               break;
+             if (vals[0] && Array.isArray(vals[0].features)) {
+               _mainLocations.mergeCustomGeoJSON(vals[0]);
+             }
+
+             var ociResources = Object.values(vals[1].resources);
+
+             if (ociResources.length) {
+               // Resolve all locationSet features.
+               return _mainLocations.mergeLocationSets(ociResources).then(function () {
+                 _oci = {
+                   resources: ociResources,
+                   defaults: vals[2].defaults
+                 };
+                 return _oci;
+               });
              } else {
-               scale.dist = +dist.toFixed(2);
+               _oci = {
+                 resources: [],
+                 // no resources?
+                 defaults: vals[2].defaults
+               };
+               return _oci;
              }
-           }
+           });
+         } // string-to-date parsing in JavaScript is weird
 
-           dLon = geoMetersToLon(scale.dist / conversion, lat);
-           scale.px = Math.round(projection([loc1[0] + dLon, loc1[1]])[0]);
-           scale.text = displayLength(scale.dist / conversion, isImperial);
-           return scale;
-         }
 
-         function update(selection) {
-           // choose loc1, loc2 along bottom of viewport (near where the scale will be drawn)
-           var dims = context.map().dimensions(),
-               loc1 = projection.invert([0, dims[1]]),
-               loc2 = projection.invert([maxLength, dims[1]]),
-               scale = scaleDefs(loc1, loc2);
-           selection.select('.scale-path').attr('d', 'M0.5,0.5v' + tickHeight + 'h' + scale.px + 'v-' + tickHeight);
-           selection.select('.scale-text').style(_mainLocalizer.textDirection() === 'ltr' ? 'left' : 'right', scale.px + 16 + 'px').html(scale.text);
-         }
+         function parseEventDate(when) {
+           if (!when) return;
+           var raw = when.trim();
+           if (!raw) return;
 
-         return function (selection) {
-           function switchUnits() {
-             isImperial = !isImperial;
-             selection.call(update);
+           if (!/Z$/.test(raw)) {
+             // if no trailing 'Z', add one
+             raw += 'Z'; // this forces date to be parsed as a UTC date
            }
 
-           var scalegroup = selection.append('svg').attr('class', 'scale').on('click', switchUnits).append('g').attr('transform', 'translate(10,11)');
-           scalegroup.append('path').attr('class', 'scale-path');
-           selection.append('div').attr('class', 'scale-text');
-           selection.call(update);
-           context.map().on('move.scale', function () {
-             update(selection);
-           });
-         };
-       }
+           var parsed = new Date(raw);
+           return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
+         }
 
-       function uiShortcuts(context) {
-         var detected = utilDetect();
-         var _activeTab = 0;
+         function success(selection) {
+           var header = selection.append('div').attr('class', 'header fillL');
+           header.append('h2').call(_t.append('success.just_edited'));
+           header.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+             return dispatch.call('cancel');
+           }).call(svgIcon('#iD-icon-close'));
+           var body = selection.append('div').attr('class', 'body save-success fillL');
+           var summary = body.append('div').attr('class', 'save-summary');
+           summary.append('h3').call(_t.append('success.thank_you' + (_location ? '_location' : ''), {
+             where: _location
+           }));
+           summary.append('p').call(_t.append('success.help_html')).append('a').attr('class', 'link-out').attr('target', '_blank').attr('href', _t('success.help_link_url')).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').call(_t.append('success.help_link_text'));
+           var osm = context.connection();
+           if (!osm) return;
+           var changesetURL = osm.changesetURL(_changeset.id);
+           var table = summary.append('table').attr('class', 'summary-table');
+           var row = table.append('tr').attr('class', 'summary-row');
+           row.append('td').attr('class', 'cell-icon summary-icon').append('a').attr('target', '_blank').attr('href', changesetURL).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', '#iD-logo-osm');
+           var summaryDetail = row.append('td').attr('class', 'cell-detail summary-detail');
+           summaryDetail.append('a').attr('class', 'cell-detail summary-view-on-osm').attr('target', '_blank').attr('href', changesetURL).call(_t.append('success.view_on_osm'));
+           summaryDetail.append('div').html(_t.html('success.changeset_id', {
+             changeset_id: {
+               html: "<a href=\"".concat(changesetURL, "\" target=\"_blank\">").concat(_changeset.id, "</a>")
+             }
+           })); // Get OSM community index features intersecting the map..
 
-         var _modalSelection;
+           ensureOSMCommunityIndex().then(function (oci) {
+             var loc = context.map().center();
+             var validLocations = _mainLocations.locationsAt(loc); // Gather the communities
 
-         var _selection = select(null);
+             var communities = [];
+             oci.resources.forEach(function (resource) {
+               var area = validLocations[resource.locationSetID];
+               if (!area) return; // Resolve strings
 
-         var _dataShortcuts;
+               var localizer = function localizer(stringID) {
+                 return _t.html("community.".concat(stringID));
+               };
 
-         function shortcutsModal(_modalSelection) {
-           _modalSelection.select('.modal').classed('modal-shortcuts', true);
+               resource.resolved = resolveStrings(resource, oci.defaults, localizer);
+               communities.push({
+                 area: area,
+                 order: resource.order || 0,
+                 resource: resource
+               });
+             }); // sort communities by feature area ascending, community order descending
 
-           var content = _modalSelection.select('.content');
+             communities.sort(function (a, b) {
+               return a.area - b.area || b.order - a.order;
+             });
+             body.call(showCommunityLinks, communities.map(function (c) {
+               return c.resource;
+             }));
+           });
+         }
 
-           content.append('div').attr('class', 'modal-section').append('h3').html(_t.html('shortcuts.title'));
-           _mainFileFetcher.get('shortcuts').then(function (data) {
-             _dataShortcuts = data;
-             content.call(render);
-           })["catch"](function () {
-             /* ignore */
+         function showCommunityLinks(selection, resources) {
+           var communityLinks = selection.append('div').attr('class', 'save-communityLinks');
+           communityLinks.append('h3').call(_t.append('success.like_osm'));
+           var table = communityLinks.append('table').attr('class', 'community-table');
+           var row = table.selectAll('.community-row').data(resources);
+           var rowEnter = row.enter().append('tr').attr('class', 'community-row');
+           rowEnter.append('td').attr('class', 'cell-icon community-icon').append('a').attr('target', '_blank').attr('href', function (d) {
+             return d.resolved.url;
+           }).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', function (d) {
+             return "#community-".concat(d.type);
            });
+           var communityDetail = rowEnter.append('td').attr('class', 'cell-detail community-detail');
+           communityDetail.each(showCommunityDetails);
+           communityLinks.append('div').attr('class', 'community-missing').call(_t.append('success.missing')).append('a').attr('class', 'link-out').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmlab/osm-community-index/issues').append('span').call(_t.append('success.tell_us'));
          }
 
-         function render(selection) {
-           if (!_dataShortcuts) return;
-           var wrapper = selection.selectAll('.wrapper').data([0]);
-           var wrapperEnter = wrapper.enter().append('div').attr('class', 'wrapper modal-section');
-           var tabsBar = wrapperEnter.append('div').attr('class', 'tabs-bar');
-           var shortcutsList = wrapperEnter.append('div').attr('class', 'shortcuts-list');
-           wrapper = wrapper.merge(wrapperEnter);
-           var tabs = tabsBar.selectAll('.tab').data(_dataShortcuts);
-           var tabsEnter = tabs.enter().append('a').attr('class', 'tab').attr('href', '#').on('click', function (d3_event, d) {
-             d3_event.preventDefault();
+         function showCommunityDetails(d) {
+           var selection = select(this);
+           var communityID = d.id;
+           selection.append('div').attr('class', 'community-name').html(d.resolved.nameHTML);
+           selection.append('div').attr('class', 'community-description').html(d.resolved.descriptionHTML); // Create an expanding section if any of these are present..
 
-             var i = _dataShortcuts.indexOf(d);
+           if (d.resolved.extendedDescriptionHTML || d.languageCodes && d.languageCodes.length) {
+             selection.append('div').call(uiDisclosure(context, "community-more-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.more')).content(showMore));
+           }
 
-             _activeTab = i;
-             render(selection);
-           });
-           tabsEnter.append('span').html(function (d) {
-             return _t.html(d.text);
-           }); // Update
+           var nextEvents = (d.events || []).map(function (event) {
+             event.date = parseEventDate(event.when);
+             return event;
+           }).filter(function (event) {
+             // date is valid and future (or today)
+             var t = event.date.getTime();
+             var now = new Date().setHours(0, 0, 0, 0);
+             return !isNaN(t) && t >= now;
+           }).sort(function (a, b) {
+             // sort by date ascending
+             return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
+           }).slice(0, MAXEVENTS); // limit number of events shown
 
-           wrapper.selectAll('.tab').classed('active', function (d, i) {
-             return i === _activeTab;
-           });
-           var shortcuts = shortcutsList.selectAll('.shortcut-tab').data(_dataShortcuts);
-           var shortcutsEnter = shortcuts.enter().append('div').attr('class', function (d) {
-             return 'shortcut-tab shortcut-tab-' + d.tab;
-           });
-           var columnsEnter = shortcutsEnter.selectAll('.shortcut-column').data(function (d) {
-             return d.columns;
-           }).enter().append('table').attr('class', 'shortcut-column');
-           var rowsEnter = columnsEnter.selectAll('.shortcut-row').data(function (d) {
-             return d.rows;
-           }).enter().append('tr').attr('class', 'shortcut-row');
-           var sectionRows = rowsEnter.filter(function (d) {
-             return !d.shortcuts;
-           });
-           sectionRows.append('td');
-           sectionRows.append('td').attr('class', 'shortcut-section').append('h3').html(function (d) {
-             return _t.html(d.text);
-           });
-           var shortcutRows = rowsEnter.filter(function (d) {
-             return d.shortcuts;
-           });
-           var shortcutKeys = shortcutRows.append('td').attr('class', 'shortcut-keys');
-           var modifierKeys = shortcutKeys.filter(function (d) {
-             return d.modifiers;
-           });
-           modifierKeys.selectAll('kbd.modifier').data(function (d) {
-             if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-               return ['⌘'];
-             } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-               return [];
-             } else {
-               return d.modifiers;
+           if (nextEvents.length) {
+             selection.append('div').call(uiDisclosure(context, "community-events-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.events')).content(showNextEvents)).select('.hide-toggle').append('span').attr('class', 'badge-text').text(nextEvents.length);
+           }
+
+           function showMore(selection) {
+             var more = selection.selectAll('.community-more').data([0]);
+             var moreEnter = more.enter().append('div').attr('class', 'community-more');
+
+             if (d.resolved.extendedDescriptionHTML) {
+               moreEnter.append('div').attr('class', 'community-extended-description').html(d.resolved.extendedDescriptionHTML);
              }
-           }).enter().each(function () {
-             var selection = select(this);
-             selection.append('kbd').attr('class', 'modifier').html(function (d) {
-               return uiCmd.display(d);
-             });
-             selection.append('span').html('+');
-           });
-           shortcutKeys.selectAll('kbd.shortcut').data(function (d) {
-             var arr = d.shortcuts;
 
-             if (detected.os === 'win' && d.text === 'shortcuts.editing.commands.redo') {
-               arr = ['Y'];
-             } else if (detected.os !== 'mac' && d.text === 'shortcuts.browsing.display_options.fullscreen') {
-               arr = ['F11'];
-             } // replace translations
+             if (d.languageCodes && d.languageCodes.length) {
+               var languageList = d.languageCodes.map(function (code) {
+                 return _mainLocalizer.languageName(code);
+               }).join(', ');
+               moreEnter.append('div').attr('class', 'community-languages').call(_t.append('success.languages', {
+                 languages: languageList
+               }));
+             }
+           }
 
+           function showNextEvents(selection) {
+             var events = selection.append('div').attr('class', 'community-events');
+             var item = events.selectAll('.community-event').data(nextEvents);
+             var itemEnter = item.enter().append('div').attr('class', 'community-event');
+             itemEnter.append('div').attr('class', 'community-event-name').append('a').attr('target', '_blank').attr('href', function (d) {
+               return d.url;
+             }).text(function (d) {
+               var name = d.name;
 
-             arr = arr.map(function (s) {
-               return uiCmd.display(s.indexOf('.') !== -1 ? _t(s) : s);
+               if (d.i18n && d.id) {
+                 name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
+                   "default": name
+                 });
+               }
+
+               return name;
              });
-             return utilArrayUniq(arr).map(function (s) {
-               return {
-                 shortcut: s,
-                 separator: d.separator,
-                 suffix: d.suffix
+             itemEnter.append('div').attr('class', 'community-event-when').text(function (d) {
+               var options = {
+                 weekday: 'short',
+                 day: 'numeric',
+                 month: 'short',
+                 year: 'numeric'
                };
+
+               if (d.date.getHours() || d.date.getMinutes()) {
+                 // include time if it has one
+                 options.hour = 'numeric';
+                 options.minute = 'numeric';
+               }
+
+               return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
              });
-           }).enter().each(function (d, i, nodes) {
-             var selection = select(this);
-             var click = d.shortcut.toLowerCase().match(/(.*).click/);
+             itemEnter.append('div').attr('class', 'community-event-where').text(function (d) {
+               var where = d.where;
 
-             if (click && click[1]) {
-               // replace "left_click", "right_click" with mouse icon
-               selection.call(svgIcon('#iD-walkthrough-mouse-' + click[1], 'operation'));
-             } else if (d.shortcut.toLowerCase() === 'long-press') {
-               selection.call(svgIcon('#iD-walkthrough-longpress', 'longpress operation'));
-             } else if (d.shortcut.toLowerCase() === 'tap') {
-               selection.call(svgIcon('#iD-walkthrough-tap', 'tap operation'));
-             } else {
-               selection.append('kbd').attr('class', 'shortcut').html(function (d) {
-                 return d.shortcut;
-               });
-             }
+               if (d.i18n && d.id) {
+                 where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
+                   "default": where
+                 });
+               }
 
-             if (i < nodes.length - 1) {
-               selection.append('span').html(d.separator || "\xA0" + _t.html('shortcuts.or') + "\xA0");
-             } else if (i === nodes.length - 1 && d.suffix) {
-               selection.append('span').html(d.suffix);
-             }
-           });
-           shortcutKeys.filter(function (d) {
-             return d.gesture;
-           }).each(function () {
-             var selection = select(this);
-             selection.append('span').html('+');
-             selection.append('span').attr('class', 'gesture').html(function (d) {
-               return _t.html(d.gesture);
+               return where;
              });
-           });
-           shortcutRows.append('td').attr('class', 'shortcut-desc').html(function (d) {
-             return d.text ? _t.html(d.text) : "\xA0";
-           }); // Update
+             itemEnter.append('div').attr('class', 'community-event-description').text(function (d) {
+               var description = d.description;
 
-           wrapper.selectAll('.shortcut-tab').style('display', function (d, i) {
-             return i === _activeTab ? 'flex' : 'none';
-           });
+               if (d.i18n && d.id) {
+                 description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
+                   "default": description
+                 });
+               }
+
+               return description;
+             });
+           }
          }
 
-         return function (selection, show) {
-           _selection = selection;
+         success.changeset = function (val) {
+           if (!arguments.length) return _changeset;
+           _changeset = val;
+           return success;
+         };
 
-           if (show) {
-             _modalSelection = uiModal(selection);
+         success.location = function (val) {
+           if (!arguments.length) return _location;
+           _location = val;
+           return success;
+         };
 
-             _modalSelection.call(shortcutsModal);
+         return utilRebind(success, dispatch, 'on');
+       }
+
+       var sawVersion = null;
+       var isNewVersion = false;
+       var isNewUser = false;
+       function uiVersion(context) {
+         var currVersion = context.version;
+         var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
+
+         if (sawVersion === null && matchedVersion !== null) {
+           if (corePreferences('sawVersion')) {
+             isNewUser = false;
+             isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
            } else {
-             context.keybinding().on([_t('shortcuts.toggle.key'), '?'], function () {
-               if (context.container().selectAll('.modal-shortcuts').size()) {
-                 // already showing
-                 if (_modalSelection) {
-                   _modalSelection.close();
+             isNewUser = true;
+             isNewVersion = true;
+           }
 
-                   _modalSelection = null;
-                 }
-               } else {
-                 _modalSelection = uiModal(_selection);
+           corePreferences('sawVersion', currVersion);
+           sawVersion = currVersion;
+         }
 
-                 _modalSelection.call(shortcutsModal);
-               }
-             });
+         return function (selection) {
+           selection.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD').text(currVersion); // only show new version indicator to users that have used iD before
+
+           if (isNewVersion && !isNewUser) {
+             selection.append('a').attr('class', 'badge').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new').call(svgIcon('#maki-gift-11')).call(uiTooltip().title(_t.html('version.whats_new', {
+               version: currVersion
+             })).placement('top').scrollContainer(context.container().select('.main-footer-wrap')));
            }
          };
        }
 
-       var pair_1 = pair;
+       function uiZoom(context) {
+         var zooms = [{
+           id: 'zoom-in',
+           icon: 'iD-icon-plus',
+           title: _t.html('zoom.in'),
+           action: zoomIn,
+           disabled: function disabled() {
+             return !context.map().canZoomIn();
+           },
+           disabledTitle: _t.html('zoom.disabled.in'),
+           key: '+'
+         }, {
+           id: 'zoom-out',
+           icon: 'iD-icon-minus',
+           title: _t.html('zoom.out'),
+           action: zoomOut,
+           disabled: function disabled() {
+             return !context.map().canZoomOut();
+           },
+           disabledTitle: _t.html('zoom.disabled.out'),
+           key: '-'
+         }];
 
-       function search(input, dims) {
-         if (!dims) dims = 'NSEW';
-         if (typeof input !== 'string') return null;
-         input = input.toUpperCase();
-         var regex = /^[\s\,]*([NSEW])?\s*([\-|\—|\―]?[0-9.]+)[°º˚]?\s*(?:([0-9.]+)['’′‘]\s*)?(?:([0-9.]+)(?:''|"|”|″)\s*)?([NSEW])?/;
-         var m = input.match(regex);
-         if (!m) return null; // no match
+         function zoomIn(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomIn();
+         }
 
-         var matched = m[0]; // extract dimension.. m[1] = leading, m[5] = trailing
+         function zoomOut(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomOut();
+         }
 
-         var dim;
+         function zoomInFurther(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomInFurther();
+         }
 
-         if (m[1] && m[5]) {
-           // if matched both..
-           dim = m[1]; // keep leading
+         function zoomOutFurther(d3_event) {
+           if (d3_event.shiftKey) return;
+           d3_event.preventDefault();
+           context.map().zoomOutFurther();
+         }
 
-           matched = matched.slice(0, -1); // remove trailing dimension from match
-         } else {
-           dim = m[1] || m[5];
-         } // if unrecognized dimension
+         return function (selection) {
+           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
+             if (d.disabled()) {
+               return d.disabledTitle;
+             }
 
+             return d.title;
+           }).keys(function (d) {
+             return [d.key];
+           });
+           var lastPointerUpType;
+           var buttons = selection.selectAll('button').data(zooms).enter().append('button').attr('class', function (d) {
+             return d.id;
+           }).on('pointerup.editor', function (d3_event) {
+             lastPointerUpType = d3_event.pointerType;
+           }).on('click.editor', function (d3_event, d) {
+             if (!d.disabled()) {
+               d.action(d3_event);
+             } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
+               context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass('disabled').label(d.disabledTitle)();
+             }
 
-         if (dim && dims.indexOf(dim) === -1) return null; // extract DMS
+             lastPointerUpType = null;
+           }).call(tooltipBehavior);
+           buttons.each(function (d) {
+             select(this).call(svgIcon('#' + d.icon, 'light'));
+           });
+           utilKeybinding.plusKeys.forEach(function (key) {
+             context.keybinding().on([key], zoomIn);
+             context.keybinding().on([uiCmd('⌥' + key)], zoomInFurther);
+           });
+           utilKeybinding.minusKeys.forEach(function (key) {
+             context.keybinding().on([key], zoomOut);
+             context.keybinding().on([uiCmd('⌥' + key)], zoomOutFurther);
+           });
 
-         var deg = m[2] ? parseFloat(m[2]) : 0;
-         var min = m[3] ? parseFloat(m[3]) / 60 : 0;
-         var sec = m[4] ? parseFloat(m[4]) / 3600 : 0;
-         var sign = deg < 0 ? -1 : 1;
-         if (dim === 'S' || dim === 'W') sign *= -1;
-         return {
-           val: (Math.abs(deg) + min + sec) * sign,
-           dim: dim,
-           matched: matched,
-           remain: input.slice(matched.length)
+           function updateButtonStates() {
+             buttons.classed('disabled', function (d) {
+               return d.disabled();
+             }).each(function () {
+               var selection = select(this);
+
+               if (!selection.select('.tooltip.in').empty()) {
+                 selection.call(tooltipBehavior.updateContent);
+               }
+             });
+           }
+
+           updateButtonStates();
+           context.map().on('move.uiZoom', updateButtonStates);
          };
        }
 
-       function pair(input, dims) {
-         input = input.trim();
-         var one = search(input, dims);
-         if (!one) return null;
-         input = one.remain.trim();
-         var two = search(input, dims);
-         if (!two || two.remain) return null;
+       function uiSectionRawTagEditor(id, context) {
+         var section = uiSection(id, context).classes('raw-tag-editor').label(function () {
+           var count = Object.keys(_tags).filter(function (d) {
+             return d;
+           }).length;
+           return _t.html('inspector.title_count', {
+             title: {
+               html: _t.html('inspector.tags')
+             },
+             count: count
+           });
+         }).expandedByDefault(false).disclosureContent(renderDisclosureContent);
+         var taginfo = services.taginfo;
+         var dispatch = dispatch$8('change');
+         var availableViews = [{
+           id: 'list',
+           icon: '#fas-th-list'
+         }, {
+           id: 'text',
+           icon: '#fas-i-cursor'
+         }];
 
-         if (one.dim) {
-           return swapdim(one.val, two.val, one.dim);
-         } else {
-           return [one.val, two.val];
-         }
-       }
+         var _tagView = corePreferences('raw-tag-editor-view') || 'list'; // 'list, 'text'
 
-       function swapdim(a, b, dim) {
-         if (dim === 'N' || dim === 'S') return [a, b];
-         if (dim === 'W' || dim === 'E') return [b, a];
-       }
 
-       function uiFeatureList(context) {
-         var _geocodeResults;
+         var _readOnlyTags = []; // the keys in the order we want them to display
 
-         function featureList(selection) {
-           var header = selection.append('div').attr('class', 'header fillL');
-           header.append('h3').html(_t.html('inspector.feature_list'));
-           var searchWrap = selection.append('div').attr('class', 'search-header');
-           searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
-           var search = searchWrap.append('input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keypress', keypress).on('keydown', keydown).on('input', inputevent);
-           var listWrap = selection.append('div').attr('class', 'inspector-body');
-           var list = listWrap.append('div').attr('class', 'feature-list');
-           context.on('exit.feature-list', clearSearch);
-           context.map().on('drawn.feature-list', mapDrawn);
-           context.keybinding().on(uiCmd('⌘F'), focusSearch);
+         var _orderedKeys = [];
+         var _showBlank = false;
+         var _pendingChange = null;
 
-           function focusSearch(d3_event) {
-             var mode = context.mode() && context.mode().id;
-             if (mode !== 'browse') return;
-             d3_event.preventDefault();
-             search.node().focus();
-           }
+         var _state;
 
-           function keydown(d3_event) {
-             if (d3_event.keyCode === 27) {
-               // escape
-               search.node().blur();
-             }
-           }
+         var _presets;
 
-           function keypress(d3_event) {
-             var q = search.property('value'),
-                 items = list.selectAll('.feature-list-item');
+         var _tags;
 
-             if (d3_event.keyCode === 13 && // ↩ Return
-             q.length && items.size()) {
-               click(items.datum());
-             }
-           }
+         var _entityIDs;
 
-           function inputevent() {
-             _geocodeResults = undefined;
-             drawList();
-           }
+         var _didInteract = false;
 
-           function clearSearch() {
-             search.property('value', '');
-             drawList();
-           }
+         function interacted() {
+           _didInteract = true;
+         }
 
-           function mapDrawn(e) {
-             if (e.full) {
-               drawList();
-             }
-           }
+         function renderDisclosureContent(wrap) {
+           // remove deleted keys
+           _orderedKeys = _orderedKeys.filter(function (key) {
+             return _tags[key] !== undefined;
+           }); // When switching to a different entity or changing the state (hover/select)
+           // reorder the keys alphabetically.
+           // We trigger this by emptying the `_orderedKeys` array, then it will be rebuilt here.
+           // Otherwise leave their order alone - #5857, #5927
 
-           function features() {
-             var result = [];
-             var graph = context.graph();
-             var visibleCenter = context.map().extent().center();
-             var q = search.property('value').toLowerCase();
-             if (!q) return result;
-             var locationMatch = pair_1(q.toUpperCase()) || q.match(/^(-?\d+\.?\d*)\s+(-?\d+\.?\d*)$/);
+           var all = Object.keys(_tags).sort();
+           var missingKeys = utilArrayDifference(all, _orderedKeys);
 
-             if (locationMatch) {
-               var loc = [parseFloat(locationMatch[0]), parseFloat(locationMatch[1])];
-               result.push({
-                 id: -1,
-                 geometry: 'point',
-                 type: _t('inspector.location'),
-                 name: dmsCoordinatePair([loc[1], loc[0]]),
-                 location: loc
-               });
-             } // A location search takes priority over an ID search
+           for (var i in missingKeys) {
+             _orderedKeys.push(missingKeys[i]);
+           } // assemble row data
 
 
-             var idMatch = !locationMatch && q.match(/(?:^|\W)(node|way|relation|[nwr])\W?0*([1-9]\d*)(?:\W|$)/i);
+           var rowData = _orderedKeys.map(function (key, i) {
+             return {
+               index: i,
+               key: key,
+               value: _tags[key]
+             };
+           }); // append blank row last, if necessary
 
-             if (idMatch) {
-               var elemType = idMatch[1].charAt(0);
-               var elemId = idMatch[2];
-               result.push({
-                 id: elemType + elemId,
-                 geometry: elemType === 'n' ? 'point' : elemType === 'w' ? 'line' : 'relation',
-                 type: elemType === 'n' ? _t('inspector.node') : elemType === 'w' ? _t('inspector.way') : _t('inspector.relation'),
-                 name: elemId
-               });
-             }
 
-             var allEntities = graph.entities;
-             var localResults = [];
+           if (!rowData.length || _showBlank) {
+             _showBlank = false;
+             rowData.push({
+               index: rowData.length,
+               key: '',
+               value: ''
+             });
+           } // View Options
 
-             for (var id in allEntities) {
-               var entity = allEntities[id];
-               if (!entity) continue;
-               var name = utilDisplayName(entity) || '';
-               if (name.toLowerCase().indexOf(q) < 0) continue;
-               var matched = _mainPresetIndex.match(entity, graph);
-               var type = matched && matched.name() || utilDisplayType(entity.id);
-               var extent = entity.extent(graph);
-               var distance = extent ? geoSphericalDistance(visibleCenter, extent.center()) : 0;
-               localResults.push({
-                 id: entity.id,
-                 entity: entity,
-                 geometry: entity.geometry(graph),
-                 type: type,
-                 name: name,
-                 distance: distance
-               });
-               if (localResults.length > 100) break;
-             }
 
-             localResults = localResults.sort(function byDistance(a, b) {
-               return a.distance - b.distance;
+           var options = wrap.selectAll('.raw-tag-options').data([0]);
+           options.exit().remove();
+           var optionsEnter = options.enter().insert('div', ':first-child').attr('class', 'raw-tag-options').attr('role', 'tablist');
+           var optionEnter = optionsEnter.selectAll('.raw-tag-option').data(availableViews, function (d) {
+             return d.id;
+           }).enter();
+           optionEnter.append('button').attr('class', function (d) {
+             return 'raw-tag-option raw-tag-option-' + d.id + (_tagView === d.id ? ' selected' : '');
+           }).attr('aria-selected', function (d) {
+             return _tagView === d.id;
+           }).attr('role', 'tab').attr('title', function (d) {
+             return _t('icons.' + d.id);
+           }).on('click', function (d3_event, d) {
+             _tagView = d.id;
+             corePreferences('raw-tag-editor-view', d.id);
+             wrap.selectAll('.raw-tag-option').classed('selected', function (datum) {
+               return datum === d;
+             }).attr('aria-selected', function (datum) {
+               return datum === d;
              });
-             result = result.concat(localResults);
+             wrap.selectAll('.tag-text').classed('hide', d.id !== 'text').each(setTextareaHeight);
+             wrap.selectAll('.tag-list, .add-row').classed('hide', d.id !== 'list');
+           }).each(function (d) {
+             select(this).call(svgIcon(d.icon));
+           }); // View as Text
 
-             (_geocodeResults || []).forEach(function (d) {
-               if (d.osm_type && d.osm_id) {
-                 // some results may be missing these - #1890
-                 // Make a temporary osmEntity so we can preset match
-                 // and better localize the search result - #4725
-                 var id = osmEntity.id.fromOSM(d.osm_type, d.osm_id);
-                 var tags = {};
-                 tags[d["class"]] = d.type;
-                 var attrs = {
-                   id: id,
-                   type: d.osm_type,
-                   tags: tags
-                 };
+           var textData = rowsToText(rowData);
+           var textarea = wrap.selectAll('.tag-text').data([0]);
+           textarea = textarea.enter().append('textarea').attr('class', 'tag-text' + (_tagView !== 'text' ? ' hide' : '')).call(utilNoAuto).attr('placeholder', _t('inspector.key_value')).attr('spellcheck', 'false').merge(textarea);
+           textarea.call(utilGetSetValue, textData).each(setTextareaHeight).on('input', setTextareaHeight).on('focus', interacted).on('blur', textChanged).on('change', textChanged); // View as List
 
-                 if (d.osm_type === 'way') {
-                   // for ways, add some fake closed nodes
-                   attrs.nodes = ['a', 'a']; // so that geometry area is possible
-                 }
+           var list = wrap.selectAll('.tag-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'tag-list' + (_tagView !== 'list' ? ' hide' : '')).merge(list); // Container for the Add button
 
-                 var tempEntity = osmEntity(attrs);
-                 var tempGraph = coreGraph([tempEntity]);
-                 var matched = _mainPresetIndex.match(tempEntity, tempGraph);
-                 var type = matched && matched.name() || utilDisplayType(id);
-                 result.push({
-                   id: tempEntity.id,
-                   geometry: tempEntity.geometry(tempGraph),
-                   type: type,
-                   name: d.display_name,
-                   extent: new geoExtent([parseFloat(d.boundingbox[3]), parseFloat(d.boundingbox[0])], [parseFloat(d.boundingbox[2]), parseFloat(d.boundingbox[1])])
-                 });
-               }
-             });
+           var addRowEnter = wrap.selectAll('.add-row').data([0]).enter().append('div').attr('class', 'add-row' + (_tagView !== 'list' ? ' hide' : ''));
+           addRowEnter.append('button').attr('class', 'add-tag').attr('aria-label', _t('inspector.add_to_tag')).call(svgIcon('#iD-icon-plus', 'light')).call(uiTooltip().title(_t.html('inspector.add_to_tag')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left')).on('click', addTag);
+           addRowEnter.append('div').attr('class', 'space-value'); // preserve space
 
-             if (q.match(/^[0-9]+$/)) {
-               // if query is just a number, possibly an OSM ID without a prefix
-               result.push({
-                 id: 'n' + q,
-                 geometry: 'point',
-                 type: _t('inspector.node'),
-                 name: q
-               });
-               result.push({
-                 id: 'w' + q,
-                 geometry: 'line',
-                 type: _t('inspector.way'),
-                 name: q
-               });
-               result.push({
-                 id: 'r' + q,
-                 geometry: 'relation',
-                 type: _t('inspector.relation'),
-                 name: q
-               });
-             }
+           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
+           // Tag list items
 
-             return result;
-           }
+           var items = list.selectAll('.tag-row').data(rowData, function (d) {
+             return d.key;
+           });
+           items.exit().each(unbind).remove(); // Enter
 
-           function drawList() {
-             var value = search.property('value');
-             var results = features();
-             list.classed('filtered', value.length);
-             var resultsIndicator = list.selectAll('.no-results-item').data([0]).enter().append('button').property('disabled', true).attr('class', 'no-results-item').call(svgIcon('#iD-icon-alert', 'pre-text'));
-             resultsIndicator.append('span').attr('class', 'entity-name');
-             list.selectAll('.no-results-item .entity-name').html(_t.html('geocoder.no_results_worldwide'));
+           var itemsEnter = items.enter().append('li').attr('class', 'tag-row').classed('readonly', isReadOnly);
+           var innerWrap = itemsEnter.append('div').attr('class', 'inner-wrap');
+           innerWrap.append('div').attr('class', 'key-wrap').append('input').property('type', 'text').attr('class', 'key').call(utilNoAuto).on('focus', interacted).on('blur', keyChange).on('change', keyChange);
+           innerWrap.append('div').attr('class', 'value-wrap').append('input').property('type', 'text').attr('class', 'value').call(utilNoAuto).on('focus', interacted).on('blur', valueChange).on('change', valueChange).on('keydown.push-more', pushMore);
+           innerWrap.append('button').attr('class', 'form-field-button remove').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete')); // Update
 
-             if (services.geocoder) {
-               list.selectAll('.geocode-item').data([0]).enter().append('button').attr('class', 'geocode-item secondary-action').on('click', geocoderSearch).append('div').attr('class', 'label').append('span').attr('class', 'entity-name').html(_t.html('geocoder.search'));
+           items = items.merge(itemsEnter).sort(function (a, b) {
+             return a.index - b.index;
+           });
+           items.each(function (d) {
+             var row = select(this);
+             var key = row.select('input.key'); // propagate bound data
+
+             var value = row.select('input.value'); // propagate bound data
+
+             if (_entityIDs && taginfo && _state !== 'hover') {
+               bindTypeahead(key, value);
              }
 
-             list.selectAll('.no-results-item').style('display', value.length && !results.length ? 'block' : 'none');
-             list.selectAll('.geocode-item').style('display', value && _geocodeResults === undefined ? 'block' : 'none');
-             list.selectAll('.feature-list-item').data([-1]).remove();
-             var items = list.selectAll('.feature-list-item').data(results, function (d) {
-               return d.id;
-             });
-             var enter = items.enter().insert('button', '.geocode-item').attr('class', 'feature-list-item').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
-             var label = enter.append('div').attr('class', 'label');
-             label.each(function (d) {
-               select(this).call(svgIcon('#iD-icon-' + d.geometry, 'pre-text'));
-             });
-             label.append('span').attr('class', 'entity-type').html(function (d) {
-               return d.type;
-             });
-             label.append('span').attr('class', 'entity-name').html(function (d) {
-               return d.name;
-             });
-             enter.style('opacity', 0).transition().style('opacity', 1);
-             items.order();
-             items.exit().remove();
-           }
+             var referenceOptions = {
+               key: d.key
+             };
 
-           function mouseover(d3_event, d) {
-             if (d.id === -1) return;
-             utilHighlightEntities([d.id], true, context);
-           }
+             if (typeof d.value === 'string') {
+               referenceOptions.value = d.value;
+             }
 
-           function mouseout(d3_event, d) {
-             if (d.id === -1) return;
-             utilHighlightEntities([d.id], false, context);
-           }
+             var reference = uiTagReference(referenceOptions);
 
-           function click(d3_event, d) {
-             d3_event.preventDefault();
+             if (_state === 'hover') {
+               reference.showing(false);
+             }
 
-             if (d.location) {
-               context.map().centerZoomEase([d.location[1], d.location[0]], 19);
-             } else if (d.entity) {
-               utilHighlightEntities([d.id], false, context);
-               context.enter(modeSelect(context, [d.entity.id]));
-               context.map().zoomToEase(d.entity);
-             } else {
-               // download, zoom to, and select the entity with the given ID
-               context.zoomToEntity(d.id);
+             row.select('.inner-wrap') // propagate bound data
+             .call(reference.button);
+             row.call(reference.body);
+             row.select('button.remove'); // propagate bound data
+           });
+           items.selectAll('input.key').attr('title', function (d) {
+             return d.key;
+           }).call(utilGetSetValue, function (d) {
+             return d.key;
+           }).attr('readonly', function (d) {
+             return isReadOnly(d) || null;
+           });
+           items.selectAll('input.value').attr('title', function (d) {
+             return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : d.value;
+           }).classed('mixed', function (d) {
+             return Array.isArray(d.value);
+           }).attr('placeholder', function (d) {
+             return typeof d.value === 'string' ? null : _t('inspector.multiple_values');
+           }).call(utilGetSetValue, function (d) {
+             return typeof d.value === 'string' ? d.value : '';
+           }).attr('readonly', function (d) {
+             return isReadOnly(d) || null;
+           });
+           items.selectAll('button.remove').on(('PointerEvent' in window ? 'pointer' : 'mouse') + 'down', removeTag); // 'click' fires too late - #5878
+         }
+
+         function isReadOnly(d) {
+           for (var i = 0; i < _readOnlyTags.length; i++) {
+             if (d.key.match(_readOnlyTags[i]) !== null) {
+               return true;
              }
            }
 
-           function geocoderSearch() {
-             services.geocoder.search(search.property('value'), function (err, resp) {
-               _geocodeResults = resp || [];
-               drawList();
-             });
-           }
+           return false;
          }
 
-         return featureList;
-       }
+         function setTextareaHeight() {
+           if (_tagView !== 'text') return;
+           var selection = select(this);
+           var matches = selection.node().value.match(/\n/g);
+           var lineCount = 2 + Number(matches && matches.length);
+           var lineHeight = 20;
+           selection.style('height', lineCount * lineHeight + 'px');
+         }
 
-       function uiSectionEntityIssues(context) {
-         var _entityIDs = [];
-         var _issues = [];
+         function stringify(s) {
+           return JSON.stringify(s).slice(1, -1); // without leading/trailing "
+         }
 
-         var _activeIssueID;
+         function unstringify(s) {
+           var leading = '';
+           var trailing = '';
 
-         var section = uiSection('entity-issues', context).shouldDisplay(function () {
-           return _issues.length > 0;
-         }).label(function () {
-           return _t('inspector.title_count', {
-             title: _t.html('issues.list_title'),
-             count: _issues.length
-           });
-         }).disclosureContent(renderDisclosureContent);
-         context.validator().on('validated.entity_issues', function () {
-           // Refresh on validated events
-           reloadIssues();
-           section.reRender();
-         }).on('focusedIssue.entity_issues', function (issue) {
-           makeActiveIssue(issue.id);
-         });
+           if (s.length < 1 || s.charAt(0) !== '"') {
+             leading = '"';
+           }
 
-         function reloadIssues() {
-           _issues = context.validator().getSharedEntityIssues(_entityIDs, {
-             includeDisabledRules: true
-           });
-         }
+           if (s.length < 2 || s.charAt(s.length - 1) !== '"' || s.charAt(s.length - 1) === '"' && s.charAt(s.length - 2) === '\\') {
+             trailing = '"';
+           }
 
-         function makeActiveIssue(issueID) {
-           _activeIssueID = issueID;
-           section.selection().selectAll('.issue-container').classed('active', function (d) {
-             return d.id === _activeIssueID;
-           });
+           return JSON.parse(leading + s + trailing);
          }
 
-         function renderDisclosureContent(selection) {
-           selection.classed('grouped-items-area', true);
-           _activeIssueID = _issues.length > 0 ? _issues[0].id : null;
-           var containers = selection.selectAll('.issue-container').data(_issues, function (d) {
-             return d.id;
-           }); // Exit
+         function rowsToText(rows) {
+           var str = rows.filter(function (row) {
+             return row.key && row.key.trim() !== '';
+           }).map(function (row) {
+             var rawVal = row.value;
+             if (typeof rawVal !== 'string') rawVal = '*';
+             var val = rawVal ? stringify(rawVal) : '';
+             return stringify(row.key) + '=' + val;
+           }).join('\n');
 
-           containers.exit().remove(); // Enter
+           if (_state !== 'hover' && str.length) {
+             return str + '\n';
+           }
 
-           var containersEnter = containers.enter().append('div').attr('class', 'issue-container');
-           var itemsEnter = containersEnter.append('div').attr('class', function (d) {
-             return 'issue severity-' + d.severity;
-           }).on('mouseover.highlight', function (d3_event, d) {
-             // don't hover-highlight the selected entity
-             var ids = d.entityIds.filter(function (e) {
-               return _entityIDs.indexOf(e) === -1;
-             });
-             utilHighlightEntities(ids, true, context);
-           }).on('mouseout.highlight', function (d3_event, d) {
-             var ids = d.entityIds.filter(function (e) {
-               return _entityIDs.indexOf(e) === -1;
-             });
-             utilHighlightEntities(ids, false, context);
-           });
-           var labelsEnter = itemsEnter.append('div').attr('class', 'issue-label');
-           var textEnter = labelsEnter.append('button').attr('class', 'issue-text').on('click', function (d3_event, d) {
-             makeActiveIssue(d.id); // expand only the clicked item
+           return str;
+         }
 
-             var extent = d.extent(context.graph());
+         function textChanged() {
+           var newText = this.value.trim();
+           var newTags = {};
+           newText.split('\n').forEach(function (row) {
+             var m = row.match(/^\s*([^=]+)=(.*)$/);
 
-             if (extent) {
-               var setZoom = Math.max(context.map().zoom(), 19);
-               context.map().unobscuredCenterZoomEase(extent.center(), setZoom);
+             if (m !== null) {
+               var k = context.cleanTagKey(unstringify(m[1].trim()));
+               var v = context.cleanTagValue(unstringify(m[2].trim()));
+               newTags[k] = v;
              }
            });
-           textEnter.each(function (d) {
-             var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-             select(this).call(svgIcon(iconName, 'issue-icon'));
-           });
-           textEnter.append('span').attr('class', 'issue-message');
-           var infoButton = labelsEnter.append('button').attr('class', 'issue-info-button').attr('title', _t('icons.information')).call(svgIcon('#iD-icon-inspect'));
-           infoButton.on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             this.blur(); // avoid keeping focus on the button - #4641
+           var tagDiff = utilTagDiff(_tags, newTags);
+           if (!tagDiff.length) return;
+           _pendingChange = _pendingChange || {};
+           tagDiff.forEach(function (change) {
+             if (isReadOnly({
+               key: change.key
+             })) return; // skip unchanged multiselection placeholders
 
-             var container = select(this.parentNode.parentNode.parentNode);
-             var info = container.selectAll('.issue-info');
-             var isExpanded = info.classed('expanded');
+             if (change.newVal === '*' && typeof change.oldVal !== 'string') return;
 
-             if (isExpanded) {
-               info.transition().duration(200).style('max-height', '0px').style('opacity', '0').on('end', function () {
-                 info.classed('expanded', false);
-               });
-             } else {
-               info.classed('expanded', true).transition().duration(200).style('max-height', '200px').style('opacity', '1').on('end', function () {
-                 info.style('max-height', null);
-               });
+             if (change.type === '-') {
+               _pendingChange[change.key] = undefined;
+             } else if (change.type === '+') {
+               _pendingChange[change.key] = change.newVal || '';
              }
            });
-           itemsEnter.append('ul').attr('class', 'issue-fix-list');
-           containersEnter.append('div').attr('class', 'issue-info').style('max-height', '0').style('opacity', '0').each(function (d) {
-             if (typeof d.reference === 'function') {
-               select(this).call(d.reference);
-             } else {
-               select(this).html(_t.html('inspector.no_documentation_key'));
-             }
-           }); // Update
 
-           containers = containers.merge(containersEnter).classed('active', function (d) {
-             return d.id === _activeIssueID;
-           });
-           containers.selectAll('.issue-message').html(function (d) {
-             return d.message(context);
-           }); // fixes
+           if (Object.keys(_pendingChange).length === 0) {
+             _pendingChange = null;
+             return;
+           }
+
+           scheduleChange();
+         }
 
-           var fixLists = containers.selectAll('.issue-fix-list');
-           var fixes = fixLists.selectAll('.issue-fix-item').data(function (d) {
-             return d.fixes ? d.fixes(context) : [];
-           }, function (fix) {
-             return fix.id;
-           });
-           fixes.exit().remove();
-           var fixesEnter = fixes.enter().append('li').attr('class', 'issue-fix-item');
-           var buttons = fixesEnter.append('button').on('click', function (d3_event, d) {
-             // not all fixes are actionable
-             if (select(this).attr('disabled') || !d.onClick) return; // Don't run another fix for this issue within a second of running one
-             // (Necessary for "Select a feature type" fix. Most fixes should only ever run once)
+         function pushMore(d3_event) {
+           // if pressing Tab on the last value field with content, add a blank row
+           if (d3_event.keyCode === 9 && !d3_event.shiftKey && section.selection().selectAll('.tag-list li:last-child input.value').node() === this && utilGetSetValue(select(this))) {
+             addTag();
+           }
+         }
 
-             if (d.issue.dateLastRanFix && new Date() - d.issue.dateLastRanFix < 1000) return;
-             d.issue.dateLastRanFix = new Date(); // remove hover-highlighting
+         function bindTypeahead(key, value) {
+           if (isReadOnly(key.datum())) return;
 
-             utilHighlightEntities(d.issue.entityIds.concat(d.entityIds), false, context);
-             new Promise(function (resolve, reject) {
-               d.onClick(context, resolve, reject);
+           if (Array.isArray(value.datum().value)) {
+             value.call(uiCombobox(context, 'tag-value').minItems(1).fetcher(function (value, callback) {
+               var keyString = utilGetSetValue(key);
+               if (!_tags[keyString]) return;
 
-               if (d.onClick.length <= 1) {
-                 // if the fix doesn't take any completion parameters then consider it resolved
-                 resolve();
+               var data = _tags[keyString].filter(Boolean).map(function (tagValue) {
+                 return {
+                   value: tagValue,
+                   title: tagValue
+                 };
+               });
+
+               callback(data);
+             }));
+             return;
+           }
+
+           var geometry = context.graph().geometry(_entityIDs[0]);
+           key.call(uiCombobox(context, 'tag-key').fetcher(function (value, callback) {
+             taginfo.keys({
+               debounce: true,
+               geometry: geometry,
+               query: value
+             }, function (err, data) {
+               if (!err) {
+                 var filtered = data.filter(function (d) {
+                   return _tags[d.value] === undefined;
+                 });
+                 callback(sort(value, filtered));
                }
-             }).then(function () {
-               // revalidate whenever the fix has finished running successfully
-               context.validator().validate();
              });
-           }).on('mouseover.highlight', function (d3_event, d) {
-             utilHighlightEntities(d.entityIds, true, context);
-           }).on('mouseout.highlight', function (d3_event, d) {
-             utilHighlightEntities(d.entityIds, false, context);
-           });
-           buttons.each(function (d) {
-             var iconName = d.icon || 'iD-icon-wrench';
+           }));
+           value.call(uiCombobox(context, 'tag-value').fetcher(function (value, callback) {
+             taginfo.values({
+               debounce: true,
+               key: utilGetSetValue(key),
+               geometry: geometry,
+               query: value
+             }, function (err, data) {
+               if (!err) callback(sort(value, data));
+             });
+           }));
 
-             if (iconName.startsWith('maki')) {
-               iconName += '-15';
-             }
+           function sort(value, data) {
+             var sameletter = [];
+             var other = [];
 
-             select(this).call(svgIcon('#' + iconName, 'fix-icon'));
-           });
-           buttons.append('span').attr('class', 'fix-message').html(function (d) {
-             return d.title;
-           });
-           fixesEnter.merge(fixes).selectAll('button').classed('actionable', function (d) {
-             return d.onClick;
-           }).attr('disabled', function (d) {
-             return d.onClick ? null : 'true';
-           }).attr('title', function (d) {
-             if (d.disabledReason) {
-               return d.disabledReason;
+             for (var i = 0; i < data.length; i++) {
+               if (data[i].value.substring(0, value.length) === value) {
+                 sameletter.push(data[i]);
+               } else {
+                 other.push(data[i]);
+               }
              }
 
-             return null;
-           });
+             return sameletter.concat(other);
+           }
          }
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
+         function unbind() {
+           var row = select(this);
+           row.selectAll('input.key').call(uiCombobox.off, context);
+           row.selectAll('input.value').call(uiCombobox.off, context);
+         }
 
-           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
-             _entityIDs = val;
-             _activeIssueID = null;
-             reloadIssues();
+         function keyChange(d3_event, d) {
+           if (select(this).attr('readonly')) return;
+           var kOld = d.key; // exit if we are currently about to delete this row anyway - #6366
+
+           if (_pendingChange && _pendingChange.hasOwnProperty(kOld) && _pendingChange[kOld] === undefined) return;
+           var kNew = context.cleanTagKey(this.value.trim()); // allow no change if the key should be readonly
+
+           if (isReadOnly({
+             key: kNew
+           })) {
+             this.value = kOld;
+             return;
            }
 
-           return section;
-         };
+           if (kNew && kNew !== kOld && _tags[kNew] !== undefined) {
+             // new key is already in use, switch focus to the existing row
+             this.value = kOld; // reset the key
 
-         return section;
-       }
+             section.selection().selectAll('.tag-list input.value').each(function (d) {
+               if (d.key === kNew) {
+                 // send focus to that other value combo instead
+                 var input = select(this).node();
+                 input.focus();
+                 input.select();
+               }
+             });
+             return;
+           }
 
-       function uiPresetIcon() {
-         var _preset;
+           _pendingChange = _pendingChange || {};
 
-         var _geometry;
+           if (kOld) {
+             if (kOld === kNew) return; // a tag key was renamed
 
-         var _sizeClass = 'medium';
+             _pendingChange[kNew] = _pendingChange[kOld] || {
+               oldKey: kOld
+             };
+             _pendingChange[kOld] = undefined;
+           } else {
+             // a new tag was added
+             var row = this.parentNode.parentNode;
+             var inputVal = select(row).selectAll('input.value');
+             var vNew = context.cleanTagValue(utilGetSetValue(inputVal));
+             _pendingChange[kNew] = vNew;
+             utilGetSetValue(inputVal, vNew);
+           } // update the ordered key index so this row doesn't change position
 
-         function isSmall() {
-           return _sizeClass === 'small';
-         }
 
-         function presetIcon(selection) {
-           selection.each(render);
-         }
+           var existingKeyIndex = _orderedKeys.indexOf(kOld);
 
-         function getIcon(p, geom) {
-           if (isSmall() && p.isFallback && p.isFallback()) return 'iD-icon-' + p.id;else if (p.icon) return p.icon;else if (geom === 'line') return 'iD-other-line';else if (geom === 'vertex') return p.isFallback() ? '' : 'temaki-vertex';else if (isSmall() && geom === 'point') return '';else return 'maki-marker-stroked';
-         }
+           if (existingKeyIndex !== -1) _orderedKeys[existingKeyIndex] = kNew;
+           d.key = kNew; // update datum to avoid exit/enter on tag update
 
-         function renderPointBorder(container, drawPoint) {
-           var pointBorder = container.selectAll('.preset-icon-point-border').data(drawPoint ? [0] : []);
-           pointBorder.exit().remove();
-           var pointBorderEnter = pointBorder.enter();
-           var w = 40;
-           var h = 40;
-           pointBorderEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-point-border').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('path').attr('transform', 'translate(11.5, 8)').attr('d', 'M 17,8 C 17,13 11,21 8.5,23.5 C 6,21 0,13 0,8 C 0,4 4,-0.5 8.5,-0.5 C 13,-0.5 17,4 17,8 z');
-           pointBorder = pointBorderEnter.merge(pointBorder);
+           this.value = kNew;
+           scheduleChange();
          }
 
-         function renderCircleFill(container, drawVertex) {
-           var vertexFill = container.selectAll('.preset-icon-fill-vertex').data(drawVertex ? [0] : []);
-           vertexFill.exit().remove();
-           var vertexFillEnter = vertexFill.enter();
-           var w = 60;
-           var h = 60;
-           var d = 40;
-           vertexFillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-vertex').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h)).append('circle').attr('cx', w / 2).attr('cy', h / 2).attr('r', d / 2);
-           vertexFill = vertexFillEnter.merge(vertexFill);
+         function valueChange(d3_event, d) {
+           if (isReadOnly(d)) return; // exit if this is a multiselection and no value was entered
+
+           if (typeof d.value !== 'string' && !this.value) return; // exit if we are currently about to delete this row anyway - #6366
+
+           if (_pendingChange && _pendingChange.hasOwnProperty(d.key) && _pendingChange[d.key] === undefined) return;
+           _pendingChange = _pendingChange || {};
+           _pendingChange[d.key] = context.cleanTagValue(this.value);
+           scheduleChange();
          }
 
-         function renderSquareFill(container, drawArea, tagClasses) {
-           var fill = container.selectAll('.preset-icon-fill-area').data(drawArea ? [0] : []);
-           fill.exit().remove();
-           var fillEnter = fill.enter();
-           var d = isSmall() ? 40 : 60;
-           var w = d;
-           var h = d;
-           var l = d * 2 / 3;
-           var c1 = (w - l) / 2;
-           var c2 = c1 + l;
-           fillEnter = fillEnter.append('svg').attr('class', 'preset-icon-fill preset-icon-fill-area').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
-           ['fill', 'stroke'].forEach(function (klass) {
-             fillEnter.append('path').attr('d', "M".concat(c1, " ").concat(c1, " L").concat(c1, " ").concat(c2, " L").concat(c2, " ").concat(c2, " L").concat(c2, " ").concat(c1, " Z")).attr('class', "line area ".concat(klass));
-           });
-           var rVertex = 2.5;
-           [[c1, c1], [c1, c2], [c2, c2], [c2, c1]].forEach(function (point) {
-             fillEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', rVertex);
-           });
+         function removeTag(d3_event, d) {
+           if (isReadOnly(d)) return;
 
-           if (!isSmall()) {
-             var rMidpoint = 1.25;
-             [[c1, w / 2], [c2, w / 2], [h / 2, c1], [h / 2, c2]].forEach(function (point) {
-               fillEnter.append('circle').attr('class', 'midpoint').attr('cx', point[0]).attr('cy', point[1]).attr('r', rMidpoint);
+           if (d.key === '') {
+             // removing the blank row
+             _showBlank = false;
+             section.reRender();
+           } else {
+             // remove the key from the ordered key index
+             _orderedKeys = _orderedKeys.filter(function (key) {
+               return key !== d.key;
              });
+             _pendingChange = _pendingChange || {};
+             _pendingChange[d.key] = undefined;
+             scheduleChange();
            }
+         }
 
-           fill = fillEnter.merge(fill);
-           fill.selectAll('path.stroke').attr('class', "area stroke ".concat(tagClasses));
-           fill.selectAll('path.fill').attr('class', "area fill ".concat(tagClasses));
+         function addTag() {
+           // Delay render in case this click is blurring an edited combo.
+           // Without the setTimeout, the `content` render would wipe out the pending tag change.
+           window.setTimeout(function () {
+             _showBlank = true;
+             section.reRender();
+             section.selection().selectAll('.tag-list li:last-child input.key').node().focus();
+           }, 20);
          }
 
-         function renderLine(container, drawLine, tagClasses) {
-           var line = container.selectAll('.preset-icon-line').data(drawLine ? [0] : []);
-           line.exit().remove();
-           var lineEnter = line.enter();
-           var d = isSmall() ? 40 : 60; // draw the line parametrically
+         function scheduleChange() {
+           // Cache IDs in case the editor is reloaded before the change event is called. - #6028
+           var entityIDs = _entityIDs; // Delay change in case this change is blurring an edited combo. - #5878
 
-           var w = d;
-           var h = d;
-           var y = Math.round(d * 0.72);
-           var l = Math.round(d * 0.6);
-           var r = 2.5;
-           var x1 = (w - l) / 2;
-           var x2 = x1 + l;
-           lineEnter = lineEnter.append('svg').attr('class', 'preset-icon-line').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
-           ['casing', 'stroke'].forEach(function (klass) {
-             lineEnter.append('path').attr('d', "M".concat(x1, " ").concat(y, " L").concat(x2, " ").concat(y)).attr('class', "line ".concat(klass));
-           });
-           [[x1 - 1, y], [x2 + 1, y]].forEach(function (point) {
-             lineEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
-           });
-           line = lineEnter.merge(line);
-           line.selectAll('path.stroke').attr('class', "line stroke ".concat(tagClasses));
-           line.selectAll('path.casing').attr('class', "line casing ".concat(tagClasses));
+           window.setTimeout(function () {
+             if (!_pendingChange) return;
+             dispatch.call('change', this, entityIDs, _pendingChange);
+             _pendingChange = null;
+           }, 10);
          }
 
-         function renderRoute(container, drawRoute, p) {
-           var route = container.selectAll('.preset-icon-route').data(drawRoute ? [0] : []);
-           route.exit().remove();
-           var routeEnter = route.enter();
-           var d = isSmall() ? 40 : 60; // draw the route parametrically
+         section.state = function (val) {
+           if (!arguments.length) return _state;
 
-           var w = d;
-           var h = d;
-           var y1 = Math.round(d * 0.80);
-           var y2 = Math.round(d * 0.68);
-           var l = Math.round(d * 0.6);
-           var r = 2;
-           var x1 = (w - l) / 2;
-           var x2 = x1 + l / 3;
-           var x3 = x2 + l / 3;
-           var x4 = x3 + l / 3;
-           routeEnter = routeEnter.append('svg').attr('class', 'preset-icon-route').attr('width', w).attr('height', h).attr('viewBox', "0 0 ".concat(w, " ").concat(h));
-           ['casing', 'stroke'].forEach(function (klass) {
-             routeEnter.append('path').attr('d', "M".concat(x1, " ").concat(y1, " L").concat(x2, " ").concat(y2)).attr('class', "segment0 line ".concat(klass));
-             routeEnter.append('path').attr('d', "M".concat(x2, " ").concat(y2, " L").concat(x3, " ").concat(y1)).attr('class', "segment1 line ".concat(klass));
-             routeEnter.append('path').attr('d', "M".concat(x3, " ").concat(y1, " L").concat(x4, " ").concat(y2)).attr('class', "segment2 line ".concat(klass));
-           });
-           [[x1, y1], [x2, y2], [x3, y1], [x4, y2]].forEach(function (point) {
-             routeEnter.append('circle').attr('class', 'vertex').attr('cx', point[0]).attr('cy', point[1]).attr('r', r);
-           });
-           route = routeEnter.merge(route);
+           if (_state !== val) {
+             _orderedKeys = [];
+             _state = val;
+           }
 
-           if (drawRoute) {
-             var routeType = p.tags.type === 'waterway' ? 'waterway' : p.tags.route;
-             var segmentPresetIDs = routeSegments[routeType];
+           return section;
+         };
 
-             for (var i in segmentPresetIDs) {
-               var segmentPreset = _mainPresetIndex.item(segmentPresetIDs[i]);
-               var segmentTagClasses = svgTagClasses().getClassesString(segmentPreset.tags, '');
-               route.selectAll("path.stroke.segment".concat(i)).attr('class', "segment".concat(i, " line stroke ").concat(segmentTagClasses));
-               route.selectAll("path.casing.segment".concat(i)).attr('class', "segment".concat(i, " line casing ").concat(segmentTagClasses));
-             }
-           }
-         } // Route icons are drawn with a zigzag annotation underneath:
-         //     o   o
-         //    / \ /
-         //   o   o
-         // This dataset defines the styles that are used to draw the zigzag segments.
+         section.presets = function (val) {
+           if (!arguments.length) return _presets;
+           _presets = val;
 
+           if (_presets && _presets.length && _presets[0].isFallback()) {
+             section.disclosureExpanded(true); // don't collapse the disclosure if the mapper used the raw tag editor - #1881
+           } else if (!_didInteract) {
+             section.disclosureExpanded(null);
+           }
 
-         var routeSegments = {
-           bicycle: ['highway/cycleway', 'highway/cycleway', 'highway/cycleway'],
-           bus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
-           trolleybus: ['highway/unclassified', 'highway/secondary', 'highway/primary'],
-           detour: ['highway/tertiary', 'highway/residential', 'highway/unclassified'],
-           ferry: ['route/ferry', 'route/ferry', 'route/ferry'],
-           foot: ['highway/footway', 'highway/footway', 'highway/footway'],
-           hiking: ['highway/path', 'highway/path', 'highway/path'],
-           horse: ['highway/bridleway', 'highway/bridleway', 'highway/bridleway'],
-           light_rail: ['railway/light_rail', 'railway/light_rail', 'railway/light_rail'],
-           monorail: ['railway/monorail', 'railway/monorail', 'railway/monorail'],
-           pipeline: ['man_made/pipeline', 'man_made/pipeline', 'man_made/pipeline'],
-           piste: ['piste/downhill', 'piste/hike', 'piste/nordic'],
-           power: ['power/line', 'power/line', 'power/line'],
-           road: ['highway/secondary', 'highway/primary', 'highway/trunk'],
-           subway: ['railway/subway', 'railway/subway', 'railway/subway'],
-           train: ['railway/rail', 'railway/rail', 'railway/rail'],
-           tram: ['railway/tram', 'railway/tram', 'railway/tram'],
-           waterway: ['waterway/stream', 'waterway/stream', 'waterway/stream']
+           return section;
          };
 
-         function render() {
-           var p = _preset.apply(this, arguments);
+         section.tags = function (val) {
+           if (!arguments.length) return _tags;
+           _tags = val;
+           return section;
+         };
 
-           var geom = _geometry ? _geometry.apply(this, arguments) : null;
+         section.entityIDs = function (val) {
+           if (!arguments.length) return _entityIDs;
 
-           if (geom === 'relation' && p.tags && (p.tags.type === 'route' && p.tags.route && routeSegments[p.tags.route] || p.tags.type === 'waterway')) {
-             geom = 'route';
+           if (!_entityIDs || !val || !utilArrayIdentical(_entityIDs, val)) {
+             _entityIDs = val;
+             _orderedKeys = [];
            }
 
-           var showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
-           var isFallback = isSmall() && p.isFallback && p.isFallback();
-           var imageURL = showThirdPartyIcons === 'true' && p.imageURL;
-           var picon = getIcon(p, geom);
-           var isMaki = picon && /^maki-/.test(picon);
-           var isTemaki = picon && /^temaki-/.test(picon);
-           var isFa = picon && /^fa[srb]-/.test(picon);
-           var isiDIcon = picon && !(isMaki || isTemaki || isFa);
-           var isCategory = !p.setTags;
-           var drawPoint = picon && geom === 'point' && isSmall() && !isFallback;
-           var drawVertex = picon !== null && geom === 'vertex' && (!isSmall() || !isFallback);
-           var drawLine = picon && geom === 'line' && !isFallback && !isCategory;
-           var drawArea = picon && geom === 'area' && !isFallback;
-           var drawRoute = picon && geom === 'route';
-           var isFramed = drawVertex || drawArea || drawLine || drawRoute;
-           var tags = !isCategory ? p.setTags({}, geom) : {};
-
-           for (var k in tags) {
-             if (tags[k] === '*') {
-               tags[k] = 'yes';
-             }
-           }
+           return section;
+         }; // pass an array of regular expressions to test against the tag key
 
-           var tagClasses = svgTagClasses().getClassesString(tags, '');
-           var selection = select(this);
-           var container = selection.selectAll('.preset-icon-container').data([0]);
-           container = container.enter().append('div').attr('class', "preset-icon-container ".concat(_sizeClass)).merge(container);
-           container.classed('showing-img', !!imageURL).classed('fallback', isFallback);
-           renderPointBorder(container, drawPoint);
-           renderCircleFill(container, drawVertex);
-           renderSquareFill(container, drawArea, tagClasses);
-           renderLine(container, drawLine, tagClasses);
-           renderRoute(container, drawRoute, p);
-           var icon = container.selectAll('.preset-icon').data(picon ? [0] : []);
-           icon.exit().remove();
-           icon = icon.enter().append('div').attr('class', 'preset-icon').call(svgIcon('')).merge(icon);
-           icon.attr('class', 'preset-icon ' + (geom ? geom + '-geom' : '')).classed('framed', isFramed).classed('preset-icon-iD', isiDIcon);
-           icon.selectAll('svg').attr('class', 'icon ' + picon + ' ' + (!isiDIcon && geom !== 'line' ? '' : tagClasses));
-           icon.selectAll('use').attr('href', '#' + picon + (isMaki ? isSmall() && geom === 'point' ? '-11' : '-15' : ''));
-           var imageIcon = container.selectAll('img.image-icon').data(imageURL ? [0] : []);
-           imageIcon.exit().remove();
-           imageIcon = imageIcon.enter().append('img').attr('class', 'image-icon').on('load', function () {
-             return container.classed('showing-img', true);
-           }).on('error', function () {
-             return container.classed('showing-img', false);
-           }).merge(imageIcon);
-           imageIcon.attr('src', imageURL);
-         }
 
-         presetIcon.preset = function (val) {
-           if (!arguments.length) return _preset;
-           _preset = utilFunctor(val);
-           return presetIcon;
+         section.readOnlyTags = function (val) {
+           if (!arguments.length) return _readOnlyTags;
+           _readOnlyTags = val;
+           return section;
          };
 
-         presetIcon.geometry = function (val) {
-           if (!arguments.length) return _geometry;
-           _geometry = utilFunctor(val);
-           return presetIcon;
-         };
+         return utilRebind(section, dispatch, 'on');
+       }
 
-         presetIcon.sizeClass = function (val) {
-           if (!arguments.length) return _sizeClass;
-           _sizeClass = val;
-           return presetIcon;
-         };
+       function uiDataEditor(context) {
+         var dataHeader = uiDataHeader();
+         var rawTagEditor = uiSectionRawTagEditor('custom-data-tag-editor', context).expandedByDefault(true).readOnlyTags([/./]);
 
-         return presetIcon;
-       }
+         var _datum;
 
-       function uiSectionFeatureType(context) {
-         var dispatch$1 = dispatch('choose');
-         var _entityIDs = [];
-         var _presets = [];
+         function dataEditor(selection) {
+           var header = selection.selectAll('.header').data([0]);
+           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+             context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h2').call(_t.append('map_data.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.data-editor').data([0]); // enter/update
 
-         var _tagReference;
+           editor.enter().append('div').attr('class', 'modal-section data-editor').merge(editor).call(dataHeader.datum(_datum));
+           var rte = body.selectAll('.raw-tag-editor').data([0]); // enter/update
 
-         var section = uiSection('feature-type', context).label(_t.html('inspector.feature_type')).disclosureContent(renderDisclosureContent);
+           rte.enter().append('div').attr('class', 'raw-tag-editor data-editor').merge(rte).call(rawTagEditor.tags(_datum && _datum.properties || {}).state('hover').render).selectAll('textarea.tag-text').attr('readonly', true).classed('readonly', true);
+         }
 
-         function renderDisclosureContent(selection) {
-           selection.classed('preset-list-item', true);
-           selection.classed('mixed-types', _presets.length > 1);
-           var presetButtonWrap = selection.selectAll('.preset-list-button-wrap').data([0]).enter().append('div').attr('class', 'preset-list-button-wrap');
-           var presetButton = presetButtonWrap.append('button').attr('class', 'preset-list-button preset-reset').call(uiTooltip().title(_t.html('inspector.back_tooltip')).placement('bottom'));
-           presetButton.append('div').attr('class', 'preset-icon-container');
-           presetButton.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
-           presetButtonWrap.append('div').attr('class', 'accessory-buttons');
-           var tagReferenceBodyWrap = selection.selectAll('.tag-reference-body-wrap').data([0]);
-           tagReferenceBodyWrap = tagReferenceBodyWrap.enter().append('div').attr('class', 'tag-reference-body-wrap').merge(tagReferenceBodyWrap); // update header
+         dataEditor.datum = function (val) {
+           if (!arguments.length) return _datum;
+           _datum = val;
+           return this;
+         };
 
-           if (_tagReference) {
-             selection.selectAll('.preset-list-button-wrap .accessory-buttons').style('display', _presets.length === 1 ? null : 'none').call(_tagReference.button);
-             tagReferenceBodyWrap.style('display', _presets.length === 1 ? null : 'none').call(_tagReference.body);
-           }
+         return dataEditor;
+       }
 
-           selection.selectAll('.preset-reset').on('click', function () {
-             dispatch$1.call('choose', this, _presets);
-           }).on('pointerdown pointerup mousedown mouseup', function (d3_event) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation();
-           });
-           var geometries = entityGeometries();
-           selection.select('.preset-list-item button').call(uiPresetIcon().geometry(_presets.length === 1 ? geometries.length === 1 && geometries[0] : null).preset(_presets.length === 1 ? _presets[0] : _mainPresetIndex.item('point')));
-           var names = _presets.length === 1 ? [_presets[0].nameLabel(), _presets[0].subtitleLabel()].filter(Boolean) : [_t('inspector.multiple_types')];
-           var label = selection.select('.label-inner');
-           var nameparts = label.selectAll('.namepart').data(names, function (d) {
-             return d;
-           });
-           nameparts.exit().remove();
-           nameparts.enter().append('div').attr('class', 'namepart').html(function (d) {
-             return d;
-           });
+       function uiOsmoseDetails(context) {
+         var _qaItem;
+
+         function issueString(d, type) {
+           if (!d) return ''; // Issue strings are cached from Osmose API
+
+           var s = services.osmose.getStrings(d.itemType);
+           return type in s ? s[type] : '';
          }
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return section;
-         };
+         function osmoseDetails(selection) {
+           var details = selection.selectAll('.error-details').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           details.exit().remove();
+           var detailsEnter = details.enter().append('div').attr('class', 'error-details qa-details-container'); // Description
+
+           if (issueString(_qaItem, 'detail')) {
+             var div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+             div.append('h4').call(_t.append('QA.keepRight.detail_description'));
+             div.append('p').attr('class', 'qa-details-description-text').html(function (d) {
+               return issueString(d, 'detail');
+             }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+           } // Elements (populated later as data is requested)
+
 
-         section.presets = function (val) {
-           if (!arguments.length) return _presets; // don't reload the same preset
+           var detailsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection');
+           var elemsDiv = detailsEnter.append('div').attr('class', 'qa-details-subsection'); // Suggested Fix (mustn't exist for every issue type)
 
-           if (!utilArrayIdentical(val, _presets)) {
-             _presets = val;
+           if (issueString(_qaItem, 'fix')) {
+             var _div = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-             if (_presets.length === 1) {
-               _tagReference = uiTagReference(_presets[0].reference()).showing(false);
-             }
-           }
+             _div.append('h4').call(_t.append('QA.osmose.fix_title'));
 
-           return section;
-         };
+             _div.append('p').html(function (d) {
+               return issueString(d, 'fix');
+             }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+           } // Common Pitfalls (mustn't exist for every issue type)
 
-         function entityGeometries() {
-           var counts = {};
 
-           for (var i in _entityIDs) {
-             var geometry = context.graph().geometry(_entityIDs[i]);
-             if (!counts[geometry]) counts[geometry] = 0;
-             counts[geometry] += 1;
-           }
+           if (issueString(_qaItem, 'trap')) {
+             var _div2 = detailsEnter.append('div').attr('class', 'qa-details-subsection');
 
-           return Object.keys(counts).sort(function (geom1, geom2) {
-             return counts[geom2] - counts[geom1];
-           });
-         }
+             _div2.append('h4').call(_t.append('QA.osmose.trap_title'));
 
-         return utilRebind(section, dispatch$1, 'on');
-       }
+             _div2.append('p').html(function (d) {
+               return issueString(d, 'trap');
+             }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+           } // Save current item to check if UI changed by time request resolves
 
-       // It borrows some code from uiHelp
 
-       function uiFieldHelp(context, fieldName) {
-         var fieldHelp = {};
+           var thisItem = _qaItem;
+           services.osmose.loadIssueDetail(_qaItem).then(function (d) {
+             // No details to add if there are no associated issue elements
+             if (!d.elems || d.elems.length === 0) return; // Do nothing if UI has moved on by the time this resolves
 
-         var _inspector = select(null);
+             if (context.selectedErrorID() !== thisItem.id && context.container().selectAll(".qaItem.osmose.hover.itemId-".concat(thisItem.id)).empty()) return; // Things like keys and values are dynamically added to a subtitle string
 
-         var _wrap = select(null);
+             if (d.detail) {
+               detailsDiv.append('h4').call(_t.append('QA.osmose.detail_title'));
+               detailsDiv.append('p').html(function (d) {
+                 return d.detail;
+               }).selectAll('a').attr('rel', 'noopener').attr('target', '_blank');
+             } // Create list of linked issue elements
 
-         var _body = select(null);
 
-         var fieldHelpKeys = {
-           restrictions: [['about', ['about', 'from_via_to', 'maxdist', 'maxvia']], ['inspecting', ['about', 'from_shadow', 'allow_shadow', 'restrict_shadow', 'only_shadow', 'restricted', 'only']], ['modifying', ['about', 'indicators', 'allow_turn', 'restrict_turn', 'only_turn']], ['tips', ['simple', 'simple_example', 'indirect', 'indirect_example', 'indirect_noedit']]]
-         };
-         var fieldHelpHeadings = {};
-         var replacements = {
-           distField: _t.html('restriction.controls.distance'),
-           viaField: _t.html('restriction.controls.via'),
-           fromShadow: icon('#iD-turn-shadow', 'inline shadow from'),
-           allowShadow: icon('#iD-turn-shadow', 'inline shadow allow'),
-           restrictShadow: icon('#iD-turn-shadow', 'inline shadow restrict'),
-           onlyShadow: icon('#iD-turn-shadow', 'inline shadow only'),
-           allowTurn: icon('#iD-turn-yes', 'inline turn'),
-           restrictTurn: icon('#iD-turn-no', 'inline turn'),
-           onlyTurn: icon('#iD-turn-only', 'inline turn')
-         }; // For each section, squash all the texts into a single markdown document
+             elemsDiv.append('h4').call(_t.append('QA.osmose.elems_title'));
+             elemsDiv.append('ul').selectAll('li').data(d.elems).enter().append('li').append('a').attr('href', '#').attr('class', 'error_entity_link').text(function (d) {
+               return d;
+             }).each(function () {
+               var link = select(this);
+               var entityID = this.textContent;
+               var entity = context.hasEntity(entityID); // Add click handler
 
-         var docs = fieldHelpKeys[fieldName].map(function (key) {
-           var helpkey = 'help.field.' + fieldName + '.' + key[0];
-           var text = key[1].reduce(function (all, part) {
-             var subkey = helpkey + '.' + part;
-             var depth = fieldHelpHeadings[subkey]; // is this subkey a heading?
+               link.on('mouseenter', function () {
+                 utilHighlightEntities([entityID], true, context);
+               }).on('mouseleave', function () {
+                 utilHighlightEntities([entityID], false, context);
+               }).on('click', function (d3_event) {
+                 d3_event.preventDefault();
+                 utilHighlightEntities([entityID], false, context);
+                 var osmlayer = context.layers().layer('osm');
 
-             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+                 if (!osmlayer.enabled()) {
+                   osmlayer.enabled(true);
+                 }
 
-             return all + hhh + _t.html(subkey, replacements) + '\n\n';
-           }, '');
-           return {
-             key: helpkey,
-             title: _t.html(helpkey + '.title'),
-             html: marked_1(text.trim())
-           };
-         });
+                 context.map().centerZoom(d.loc, 20);
 
-         function show() {
-           updatePosition();
+                 if (entity) {
+                   context.enter(modeSelect(context, [entityID]));
+                 } else {
+                   context.loadEntity(entityID, function (err, result) {
+                     if (err) return;
+                     var entity = result.data.find(function (e) {
+                       return e.id === entityID;
+                     });
+                     if (entity) context.enter(modeSelect(context, [entityID]));
+                   });
+                 }
+               }); // Replace with friendly name if possible
+               // (The entity may not yet be loaded into the graph)
 
-           _body.classed('hide', false).style('opacity', '0').transition().duration(200).style('opacity', '1');
-         }
+               if (entity) {
+                 var name = utilDisplayName(entity); // try to use common name
 
-         function hide() {
-           _body.classed('hide', true).transition().duration(200).style('opacity', '0').on('end', function () {
-             _body.classed('hide', true);
-           });
-         }
+                 if (!name) {
+                   var preset = _mainPresetIndex.match(entity, context.graph());
+                   name = preset && !preset.isFallback() && preset.name(); // fallback to preset name
+                 }
 
-         function clickHelp(index) {
-           var d = docs[index];
-           var tkeys = fieldHelpKeys[fieldName][index][1];
+                 if (name) {
+                   this.innerText = name;
+                 }
+               }
+             }); // Don't hide entities related to this issue - #5880
 
-           _body.selectAll('.field-help-nav-item').classed('active', function (d, i) {
-             return i === index;
+             context.features().forceVisible(d.elems);
+             context.map().pan([0, 0]); // trigger a redraw
+           })["catch"](function (err) {
+             console.log(err); // eslint-disable-line no-console
            });
+         }
 
-           var content = _body.selectAll('.field-help-content').html(d.html); // class the paragraphs so we can find and style them
+         osmoseDetails.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseDetails;
+         };
 
+         return osmoseDetails;
+       }
 
-           content.selectAll('p').attr('class', function (d, i) {
-             return tkeys[i];
-           }); // insert special content for certain help sections
+       function uiOsmoseHeader() {
+         var _qaItem;
 
-           if (d.key === 'help.field.restrictions.inspecting') {
-             content.insert('img', 'p.from_shadow').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_inspect.gif'));
-           } else if (d.key === 'help.field.restrictions.modifying') {
-             content.insert('img', 'p.allow_turn').attr('class', 'field-help-image cf').attr('src', context.imagePath('tr_modify.gif'));
-           }
-         }
+         function issueTitle(d) {
+           var unknown = _t('inspector.unknown');
+           if (!d) return unknown; // Issue titles supplied by Osmose
 
-         fieldHelp.button = function (selection) {
-           if (_body.empty()) return;
-           var button = selection.selectAll('.field-help-button').data([0]); // enter/update
+           var s = services.osmose.getStrings(d.itemType);
+           return 'title' in s ? s.title : unknown;
+         }
 
-           button.enter().append('button').attr('class', 'field-help-button').call(svgIcon('#iD-icon-help')).merge(button).on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
+         function osmoseHeader(selection) {
+           var header = selection.selectAll('.qa-header').data(_qaItem ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           });
+           header.exit().remove();
+           var headerEnter = header.enter().append('div').attr('class', 'qa-header');
+           var svgEnter = headerEnter.append('div').attr('class', 'qa-header-icon').classed('new', function (d) {
+             return d.id < 0;
+           }).append('svg').attr('width', '20px').attr('height', '30px').attr('viewbox', '0 0 20 30').attr('class', function (d) {
+             return "preset-icon-28 qaItem ".concat(d.service, " itemId-").concat(d.id, " itemType-").concat(d.itemType);
+           });
+           svgEnter.append('polygon').attr('fill', function (d) {
+             return services.osmose.getColor(d.item);
+           }).attr('class', 'qaItem-fill').attr('points', '16,3 4,3 1,6 1,17 4,20 7,20 10,27 13,20 16,20 19,17.033 19,6');
+           svgEnter.append('use').attr('class', 'icon-annotation').attr('width', '13px').attr('height', '13px').attr('transform', 'translate(3.5, 5)').attr('xlink:href', function (d) {
+             var picon = d.icon;
 
-             if (_body.classed('hide')) {
-               show();
+             if (!picon) {
+               return '';
              } else {
-               hide();
+               var isMaki = /^maki-/.test(picon);
+               return "#".concat(picon).concat(isMaki ? '-11' : '');
              }
            });
-         };
-
-         function updatePosition() {
-           var wrap = _wrap.node();
+           headerEnter.append('div').attr('class', 'qa-header-label').text(issueTitle);
+         }
 
-           var inspector = _inspector.node();
+         osmoseHeader.issue = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseHeader;
+         };
 
-           var wRect = wrap.getBoundingClientRect();
-           var iRect = inspector.getBoundingClientRect();
+         return osmoseHeader;
+       }
 
-           _body.style('top', wRect.top + inspector.scrollTop - iRect.top + 'px');
-         }
+       function uiViewOnOsmose() {
+         var _qaItem;
 
-         fieldHelp.body = function (selection) {
-           // This control expects the field to have a form-field-input-wrap div
-           _wrap = selection.selectAll('.form-field-input-wrap');
-           if (_wrap.empty()) return; // absolute position relative to the inspector, so it "floats" above the fields
+         function viewOnOsmose(selection) {
+           var url;
 
-           _inspector = context.container().select('.sidebar .entity-editor-pane .inspector-body');
-           if (_inspector.empty()) return;
-           _body = _inspector.selectAll('.field-help-body').data([0]);
+           if (services.osmose && _qaItem instanceof QAItem) {
+             url = services.osmose.itemURL(_qaItem);
+           }
 
-           var enter = _body.enter().append('div').attr('class', 'field-help-body hide'); // initially hidden
+           var link = selection.selectAll('.view-on-osmose').data(url ? [url] : []); // exit
 
+           link.exit().remove(); // enter
 
-           var titleEnter = enter.append('div').attr('class', 'field-help-title cf');
-           titleEnter.append('h2').attr('class', _mainLocalizer.textDirection() === 'rtl' ? 'fr' : 'fl').html(_t.html('help.field.' + fieldName + '.title'));
-           titleEnter.append('button').attr('class', 'fr close').on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             hide();
-           }).call(svgIcon('#iD-icon-close'));
-           var navEnter = enter.append('div').attr('class', 'field-help-nav cf');
-           var titles = docs.map(function (d) {
-             return d.title;
-           });
-           navEnter.selectAll('.field-help-nav-item').data(titles).enter().append('div').attr('class', 'field-help-nav-item').html(function (d) {
+           var linkEnter = link.enter().append('a').attr('class', 'view-on-osmose').attr('target', '_blank').attr('rel', 'noopener') // security measure
+           .attr('href', function (d) {
              return d;
-           }).on('click', function (d3_event, d) {
-             d3_event.stopPropagation();
-             d3_event.preventDefault();
-             clickHelp(titles.indexOf(d));
-           });
-           enter.append('div').attr('class', 'field-help-content');
-           _body = _body.merge(enter);
-           clickHelp(0);
+           }).call(svgIcon('#iD-icon-out-link', 'inline'));
+           linkEnter.append('span').call(_t.append('inspector.view_on_osmose'));
+         }
+
+         viewOnOsmose.what = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return viewOnOsmose;
          };
 
-         return fieldHelp;
+         return viewOnOsmose;
        }
 
-       function uiFieldCheck(field, context) {
-         var dispatch$1 = dispatch('change');
-         var options = field.strings && field.strings.options;
-         var values = [];
-         var texts = [];
-
-         var _tags;
-
-         var input = select(null);
-         var text = select(null);
-         var label = select(null);
-         var reverser = select(null);
-
-         var _impliedYes;
-
-         var _entityIDs = [];
-
-         var _value;
+       function uiOsmoseEditor(context) {
+         var dispatch = dispatch$8('change');
+         var qaDetails = uiOsmoseDetails(context);
+         var qaHeader = uiOsmoseHeader();
 
-         if (options) {
-           for (var k in options) {
-             values.push(k === 'undefined' ? undefined : k);
-             texts.push(field.t.html('options.' + k, {
-               'default': options[k]
-             }));
-           }
-         } else {
-           values = [undefined, 'yes'];
-           texts = [_t.html('inspector.unknown'), _t.html('inspector.check.yes')];
+         var _qaItem;
 
-           if (field.type !== 'defaultCheck') {
-             values.push('no');
-             texts.push(_t.html('inspector.check.no'));
-           }
-         } // Checks tags to see whether an undefined value is "Assumed to be Yes"
+         function osmoseEditor(selection) {
+           var header = selection.selectAll('.header').data([0]);
+           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
+           headerEnter.append('button').attr('class', 'close').attr('title', _t('icons.close')).on('click', function () {
+             return context.enter(modeBrowse(context));
+           }).call(svgIcon('#iD-icon-close'));
+           headerEnter.append('h2').call(_t.append('QA.osmose.title'));
+           var body = selection.selectAll('.body').data([0]);
+           body = body.enter().append('div').attr('class', 'body').merge(body);
+           var editor = body.selectAll('.qa-editor').data([0]);
+           editor.enter().append('div').attr('class', 'modal-section qa-editor').merge(editor).call(qaHeader.issue(_qaItem)).call(qaDetails.issue(_qaItem)).call(osmoseSaveSection);
+           var footer = selection.selectAll('.footer').data([0]);
+           footer.enter().append('div').attr('class', 'footer').merge(footer).call(uiViewOnOsmose().what(_qaItem));
+         }
 
+         function osmoseSaveSection(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-         function checkImpliedYes() {
-           _impliedYes = field.id === 'oneway_yes'; // hack: pretend `oneway` field is a `oneway_yes` field
-           // where implied oneway tag exists (e.g. `junction=roundabout`) #2220, #1841
+           var isShown = _qaItem && isSelected;
+           var saveSection = selection.selectAll('.qa-save').data(isShown ? [_qaItem] : [], function (d) {
+             return "".concat(d.id, "-").concat(d.status || 0);
+           }); // exit
 
-           if (field.id === 'oneway') {
-             var entity = context.entity(_entityIDs[0]);
+           saveSection.exit().remove(); // enter
 
-             for (var key in entity.tags) {
-               if (key in osmOneWayTags && entity.tags[key] in osmOneWayTags[key]) {
-                 _impliedYes = true;
-                 texts[0] = _t.html('presets.fields.oneway_yes.options.undefined');
-                 break;
-               }
-             }
-           }
-         }
+           var saveSectionEnter = saveSection.enter().append('div').attr('class', 'qa-save save-section cf'); // update
 
-         function reverserHidden() {
-           if (!context.container().select('div.inspector-hover').empty()) return true;
-           return !(_value === 'yes' || _impliedYes && !_value);
+           saveSection = saveSectionEnter.merge(saveSection).call(qaSaveButtons);
          }
 
-         function reverserSetText(selection) {
-           var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-           if (reverserHidden() || !entity) return selection;
-           var first = entity.first();
-           var last = entity.isClosed() ? entity.nodes[entity.nodes.length - 2] : entity.last();
-           var pseudoDirection = first < last;
-           var icon = pseudoDirection ? '#iD-icon-forward' : '#iD-icon-backward';
-           selection.selectAll('.reverser-span').html(_t.html('inspector.check.reverser')).call(svgIcon(icon, 'inline'));
-           return selection;
-         }
+         function qaSaveButtons(selection) {
+           var isSelected = _qaItem && _qaItem.id === context.selectedErrorID();
 
-         var check = function check(selection) {
-           checkImpliedYes();
-           label = selection.selectAll('.form-field-input-wrap').data([0]);
-           var enter = label.enter().append('label').attr('class', 'form-field-input-wrap form-field-input-check');
-           enter.append('input').property('indeterminate', field.type !== 'defaultCheck').attr('type', 'checkbox').attr('id', field.domId);
-           enter.append('span').html(texts[0]).attr('class', 'value');
+           var buttonSection = selection.selectAll('.buttons').data(isSelected ? [_qaItem] : [], function (d) {
+             return d.status + d.id;
+           }); // exit
 
-           if (field.type === 'onewayCheck') {
-             enter.append('button').attr('class', 'reverser' + (reverserHidden() ? ' hide' : '')).append('span').attr('class', 'reverser-span');
-           }
+           buttonSection.exit().remove(); // enter
 
-           label = label.merge(enter);
-           input = label.selectAll('input');
-           text = label.selectAll('span.value');
-           input.on('click', function (d3_event) {
-             d3_event.stopPropagation();
-             var t = {};
+           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons');
+           buttonEnter.append('button').attr('class', 'button close-button action');
+           buttonEnter.append('button').attr('class', 'button ignore-button action'); // update
 
-             if (Array.isArray(_tags[field.key])) {
-               if (values.indexOf('yes') !== -1) {
-                 t[field.key] = 'yes';
-               } else {
-                 t[field.key] = values[0];
-               }
-             } else {
-               t[field.key] = values[(values.indexOf(_value) + 1) % values.length];
-             } // Don't cycle through `alternating` or `reversible` states - #4970
-             // (They are supported as translated strings, but should not toggle with clicks)
+           buttonSection = buttonSection.merge(buttonEnter);
+           buttonSection.select('.close-button').call(_t.append('QA.keepRight.close')).on('click.close', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
 
+             var qaService = services.osmose;
 
-             if (t[field.key] === 'reversible' || t[field.key] === 'alternating') {
-               t[field.key] = values[0];
+             if (qaService) {
+               d.newStatus = 'done';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
              }
-
-             dispatch$1.call('change', this, t);
            });
+           buttonSection.select('.ignore-button').call(_t.append('QA.keepRight.ignore')).on('click.ignore', function (d3_event, d) {
+             this.blur(); // avoid keeping focus on the button - #4641
 
-           if (field.type === 'onewayCheck') {
-             reverser = label.selectAll('.reverser');
-             reverser.call(reverserSetText).on('click', function (d3_event) {
-               d3_event.preventDefault();
-               d3_event.stopPropagation();
-               context.perform(function (graph) {
-                 for (var i in _entityIDs) {
-                   graph = actionReverse(_entityIDs[i])(graph);
-                 }
+             var qaService = services.osmose;
 
-                 return graph;
-               }, _t('operations.reverse.annotation.line', {
-                 n: 1
-               })); // must manually revalidate since no 'change' event was called
+             if (qaService) {
+               d.newStatus = 'false';
+               qaService.postUpdate(d, function (err, item) {
+                 return dispatch.call('change', item);
+               });
+             }
+           });
+         } // NOTE: Don't change method name until UI v3 is merged
 
-               context.validator().validate();
-               select(this).call(reverserSetText);
-             });
-           }
-         };
 
-         check.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return check;
+         osmoseEditor.error = function (val) {
+           if (!arguments.length) return _qaItem;
+           _qaItem = val;
+           return osmoseEditor;
          };
 
-         check.tags = function (tags) {
-           _tags = tags;
-
-           function isChecked(val) {
-             return val !== 'no' && val !== '' && val !== undefined && val !== null;
-           }
-
-           function textFor(val) {
-             if (val === '') val = undefined;
-             var index = values.indexOf(val);
-             return index !== -1 ? texts[index] : '"' + val + '"';
-           }
-
-           checkImpliedYes();
-           var isMixed = Array.isArray(tags[field.key]);
-           _value = !isMixed && tags[field.key] && tags[field.key].toLowerCase();
-
-           if (field.type === 'onewayCheck' && (_value === '1' || _value === '-1')) {
-             _value = 'yes';
-           }
-
-           input.property('indeterminate', isMixed || field.type !== 'defaultCheck' && !_value).property('checked', isChecked(_value));
-           text.html(isMixed ? _t.html('inspector.multiple_values') : textFor(_value)).classed('mixed', isMixed);
-           label.classed('set', !!_value);
+         return utilRebind(osmoseEditor, dispatch, 'on');
+       }
 
-           if (field.type === 'onewayCheck') {
-             reverser.classed('hide', reverserHidden()).call(reverserSetText);
-           }
-         };
+       function uiSidebar(context) {
+         var inspector = uiInspector(context);
+         var dataEditor = uiDataEditor(context);
+         var noteEditor = uiNoteEditor(context);
+         var improveOsmEditor = uiImproveOsmEditor(context);
+         var keepRightEditor = uiKeepRightEditor(context);
+         var osmoseEditor = uiOsmoseEditor(context);
 
-         check.focus = function () {
-           input.node().focus();
-         };
+         var _current;
 
-         return utilRebind(check, dispatch$1, 'on');
-       }
+         var _wasData = false;
+         var _wasNote = false;
+         var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
 
-       function uiFieldCombo(field, context) {
-         var dispatch$1 = dispatch('change');
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-         var _isMulti = field.type === 'multiCombo' || field.type === 'manyCombo';
+         function sidebar(selection) {
+           var container = context.container();
+           var minWidth = 240;
+           var sidebarWidth;
+           var containerWidth;
+           var dragOffset; // Set the initial width constraints
 
-         var _isNetwork = field.type === 'networkCombo';
+           selection.style('min-width', minWidth + 'px').style('max-width', '400px').style('width', '33.3333%');
+           var resizer = selection.append('div').attr('class', 'sidebar-resizer').on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
+           var downPointerId, lastClientX, containerLocGetter;
 
-         var _isSemi = field.type === 'semiCombo';
+           function pointerdown(d3_event) {
+             if (downPointerId) return;
+             if ('button' in d3_event && d3_event.button !== 0) return;
+             downPointerId = d3_event.pointerId || 'mouse';
+             lastClientX = d3_event.clientX;
+             containerLocGetter = utilFastMouse(container.node()); // offset from edge of sidebar-resizer
 
-         var _optstrings = field.strings && field.strings.options;
+             dragOffset = utilFastMouse(resizer.node())(d3_event)[0] - 1;
+             sidebarWidth = selection.node().getBoundingClientRect().width;
+             containerWidth = container.node().getBoundingClientRect().width;
+             var widthPct = sidebarWidth / containerWidth * 100;
+             selection.style('width', widthPct + '%') // lock in current width
+             .style('max-width', '85%'); // but allow larger widths
 
-         var _optarray = field.options;
+             resizer.classed('dragging', true);
+             select(window).on('touchmove.sidebar-resizer', function (d3_event) {
+               // disable page scrolling while resizing on touch input
+               d3_event.preventDefault();
+             }, {
+               passive: false
+             }).on(_pointerPrefix + 'move.sidebar-resizer', pointermove).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
+           }
 
-         var _snake_case = field.snake_case || field.snake_case === undefined;
+           function pointermove(d3_event) {
+             if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+             d3_event.preventDefault();
+             var dx = d3_event.clientX - lastClientX;
+             lastClientX = d3_event.clientX;
+             var isRTL = _mainLocalizer.textDirection() === 'rtl';
+             var scaleX = isRTL ? 0 : 1;
+             var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+             var x = containerLocGetter(d3_event)[0] - dragOffset;
+             sidebarWidth = isRTL ? containerWidth - x : x;
+             var isCollapsed = selection.classed('collapsed');
+             var shouldCollapse = sidebarWidth < minWidth;
+             selection.classed('collapsed', shouldCollapse);
 
-         var _combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(field.caseSensitive).minItems(_isMulti || _isSemi ? 1 : 2);
+             if (shouldCollapse) {
+               if (!isCollapsed) {
+                 selection.style(xMarginProperty, '-400px').style('width', '400px');
+                 context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
+               }
+             } else {
+               var widthPct = sidebarWidth / containerWidth * 100;
+               selection.style(xMarginProperty, null).style('width', widthPct + '%');
 
-         var _container = select(null);
+               if (isCollapsed) {
+                 context.ui().onResize([-sidebarWidth * scaleX, 0]);
+               } else {
+                 context.ui().onResize([-dx * scaleX, 0]);
+               }
+             }
+           }
 
-         var _inputWrap = select(null);
+           function pointerup(d3_event) {
+             if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
+             downPointerId = null;
+             resizer.classed('dragging', false);
+             select(window).on('touchmove.sidebar-resizer', null).on(_pointerPrefix + 'move.sidebar-resizer', null).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
+           }
 
-         var _input = select(null);
+           var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
+           var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');
 
-         var _comboData = [];
-         var _multiData = [];
-         var _entityIDs = [];
+           var hoverModeSelect = function hoverModeSelect(targets) {
+             context.container().selectAll('.feature-list-item button').classed('hover', false);
 
-         var _tags;
+             if (context.selectedIDs().length > 1 && targets && targets.length) {
+               var elements = context.container().selectAll('.feature-list-item button').filter(function (node) {
+                 return targets.indexOf(node) !== -1;
+               });
 
-         var _countryCode;
+               if (!elements.empty()) {
+                 elements.classed('hover', true);
+               }
+             }
+           };
 
-         var _staticPlaceholder; // initialize deprecated tags array
+           sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
+           function hover(targets) {
+             var datum = targets && targets.length && targets[0];
 
-         var _dataDeprecated = [];
-         _mainFileFetcher.get('deprecated').then(function (d) {
-           _dataDeprecated = d;
-         })["catch"](function () {
-           /* ignore */
-         }); // ensure multiCombo field.key ends with a ':'
+             if (datum && datum.__featurehash__) {
+               // hovering on data
+               _wasData = true;
+               sidebar.show(dataEditor.datum(datum));
+               selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+             } else if (datum instanceof osmNote) {
+               if (context.mode().id === 'drag-note') return;
+               _wasNote = true;
+               var osm = services.osm;
 
-         if (_isMulti && field.key && /[^:]$/.test(field.key)) {
-           field.key += ':';
-         }
+               if (osm) {
+                 datum = osm.getNote(datum.id); // marker may contain stale data - get latest
+               }
 
-         function snake(s) {
-           return s.replace(/\s+/g, '_');
-         }
+               sidebar.show(noteEditor.note(datum));
+               selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+             } else if (datum instanceof QAItem) {
+               _wasQaItem = true;
+               var errService = services[datum.service];
 
-         function unsnake(s) {
-           return s.replace(/_+/g, ' ');
-         }
+               if (errService) {
+                 // marker may contain stale data - get latest
+                 datum = errService.getError(datum.id);
+               } // Currently only three possible services
 
-         function clean(s) {
-           return s.split(';').map(function (s) {
-             return s.trim();
-           }).join(';');
-         } // returns the tag value for a display value
-         // (for multiCombo, dval should be the key suffix, not the entire key)
 
+               var errEditor;
 
-         function tagValue(dval) {
-           dval = clean(dval || '');
+               if (datum.service === 'keepRight') {
+                 errEditor = keepRightEditor;
+               } else if (datum.service === 'osmose') {
+                 errEditor = osmoseEditor;
+               } else {
+                 errEditor = improveOsmEditor;
+               }
 
-           if (_optstrings) {
-             var found = _comboData.find(function (o) {
-               return o.key && clean(o.value) === dval;
-             });
+               context.container().selectAll('.qaItem.' + datum.service).classed('hover', function (d) {
+                 return d.id === datum.id;
+               });
+               sidebar.show(errEditor.error(datum));
+               selection.selectAll('.sidebar-component').classed('inspector-hover', true);
+             } else if (!_current && datum instanceof osmEntity) {
+               featureListWrap.classed('inspector-hidden', true);
+               inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', true);
 
-             if (found) {
-               return found.key;
+               if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
+                 inspector.state('hover').entityIDs([datum.id]).newFeature(false);
+                 inspectorWrap.call(inspector);
+               }
+             } else if (!_current) {
+               featureListWrap.classed('inspector-hidden', false);
+               inspectorWrap.classed('inspector-hidden', true);
+               inspector.state('hide');
+             } else if (_wasData || _wasNote || _wasQaItem) {
+               _wasNote = false;
+               _wasData = false;
+               _wasQaItem = false;
+               context.container().selectAll('.note').classed('hover', false);
+               context.container().selectAll('.qaItem').classed('hover', false);
+               sidebar.hide();
              }
            }
 
-           if (field.type === 'typeCombo' && !dval) {
-             return 'yes';
-           }
-
-           return (_snake_case ? snake(dval) : dval) || undefined;
-         } // returns the display value for a tag value
-         // (for multiCombo, tval should be the key suffix, not the entire key)
-
-
-         function displayValue(tval) {
-           tval = tval || '';
+           sidebar.hover = throttle(hover, 200);
 
-           if (_optstrings) {
-             var found = _comboData.find(function (o) {
-               return o.key === tval && o.value;
-             });
+           sidebar.intersects = function (extent) {
+             var rect = selection.node().getBoundingClientRect();
+             return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
+           };
 
-             if (found) {
-               return found.value;
-             }
-           }
+           sidebar.select = function (ids, newFeature) {
+             sidebar.hide();
 
-           if (field.type === 'typeCombo' && tval.toLowerCase() === 'yes') {
-             return '';
-           }
+             if (ids && ids.length) {
+               var entity = ids.length === 1 && context.entity(ids[0]);
 
-           return _snake_case ? unsnake(tval) : tval;
-         } // Compute the difference between arrays of objects by `value` property
-         //
-         // objectDifference([{value:1}, {value:2}, {value:3}], [{value:2}])
-         // > [{value:1}, {value:3}]
-         //
+               if (entity && newFeature && selection.classed('collapsed')) {
+                 // uncollapse the sidebar
+                 var extent = entity.extent(context.graph());
+                 sidebar.expand(sidebar.intersects(extent));
+               }
 
+               featureListWrap.classed('inspector-hidden', true);
+               inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', false); // reload the UI even if the ids are the same since the entities
+               // themselves may have changed
 
-         function objectDifference(a, b) {
-           return a.filter(function (d1) {
-             return !b.some(function (d2) {
-               return !d2.isMixed && d1.value === d2.value;
-             });
-           });
-         }
+               inspector.state('select').entityIDs(ids).newFeature(newFeature);
+               inspectorWrap.call(inspector);
+             } else {
+               inspector.state('hide');
+             }
+           };
 
-         function initCombo(selection, attachTo) {
-           if (_optstrings) {
-             selection.attr('readonly', 'readonly');
-             selection.call(_combobox, attachTo);
-             setStaticValues(setPlaceholder);
-           } else if (_optarray) {
-             selection.call(_combobox, attachTo);
-             setStaticValues(setPlaceholder);
-           } else if (services.taginfo) {
-             selection.call(_combobox.fetcher(setTaginfoValues), attachTo);
-             setTaginfoValues('', setPlaceholder);
-           }
-         }
+           sidebar.showPresetList = function () {
+             inspector.showList();
+           };
 
-         function setStaticValues(callback) {
-           if (!(_optstrings || _optarray)) return;
+           sidebar.show = function (component, element) {
+             featureListWrap.classed('inspector-hidden', true);
+             inspectorWrap.classed('inspector-hidden', true);
+             if (_current) _current.remove();
+             _current = selection.append('div').attr('class', 'sidebar-component').call(component, element);
+           };
 
-           if (_optstrings) {
-             _comboData = Object.keys(_optstrings).map(function (k) {
-               var v = field.t('options.' + k, {
-                 'default': _optstrings[k]
-               });
-               return {
-                 key: k,
-                 value: v,
-                 title: v,
-                 display: field.t.html('options.' + k, {
-                   'default': _optstrings[k]
-                 })
-               };
-             });
-           } else if (_optarray) {
-             _comboData = _optarray.map(function (k) {
-               var v = _snake_case ? unsnake(k) : k;
-               return {
-                 key: k,
-                 value: v,
-                 title: v
-               };
-             });
-           }
+           sidebar.hide = function () {
+             featureListWrap.classed('inspector-hidden', false);
+             inspectorWrap.classed('inspector-hidden', true);
+             if (_current) _current.remove();
+             _current = null;
+           };
 
-           _combobox.data(objectDifference(_comboData, _multiData));
+           sidebar.expand = function (moveMap) {
+             if (selection.classed('collapsed')) {
+               sidebar.toggle(moveMap);
+             }
+           };
 
-           if (callback) callback(_comboData);
-         }
+           sidebar.collapse = function (moveMap) {
+             if (!selection.classed('collapsed')) {
+               sidebar.toggle(moveMap);
+             }
+           };
 
-         function setTaginfoValues(q, callback) {
-           var fn = _isMulti ? 'multikeys' : 'values';
-           var query = (_isMulti ? field.key : '') + q;
-           var hasCountryPrefix = _isNetwork && _countryCode && _countryCode.indexOf(q.toLowerCase()) === 0;
+           sidebar.toggle = function (moveMap) {
+             // Don't allow sidebar to toggle when the user is in the walkthrough.
+             if (context.inIntro()) return;
+             var isCollapsed = selection.classed('collapsed');
+             var isCollapsing = !isCollapsed;
+             var isRTL = _mainLocalizer.textDirection() === 'rtl';
+             var scaleX = isRTL ? 0 : 1;
+             var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
+             sidebarWidth = selection.node().getBoundingClientRect().width; // switch from % to px
 
-           if (hasCountryPrefix) {
-             query = _countryCode + ':';
-           }
+             selection.style('width', sidebarWidth + 'px');
+             var startMargin, endMargin, lastMargin;
 
-           var params = {
-             debounce: q !== '',
-             key: field.key,
-             query: query
-           };
+             if (isCollapsing) {
+               startMargin = lastMargin = 0;
+               endMargin = -sidebarWidth;
+             } else {
+               startMargin = lastMargin = -sidebarWidth;
+               endMargin = 0;
+             }
 
-           if (_entityIDs.length) {
-             params.geometry = context.graph().geometry(_entityIDs[0]);
-           }
+             if (!isCollapsing) {
+               // unhide the sidebar's content before it transitions onscreen
+               selection.classed('collapsed', isCollapsing);
+             }
 
-           services.taginfo[fn](params, function (err, data) {
-             if (err) return;
-             data = data.filter(function (d) {
-               if (field.type === 'typeCombo' && d.value === 'yes') {
-                 // don't show the fallback value
-                 return false;
-               } // don't show values with very low usage
+             selection.transition().style(xMarginProperty, endMargin + 'px').tween('panner', function () {
+               var i = d3_interpolateNumber(startMargin, endMargin);
+               return function (t) {
+                 var dx = lastMargin - Math.round(i(t));
+                 lastMargin = lastMargin - dx;
+                 context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
+               };
+             }).on('end', function () {
+               if (isCollapsing) {
+                 // hide the sidebar's content after it transitions offscreen
+                 selection.classed('collapsed', isCollapsing);
+               } // switch back from px to %
 
 
-               return !d.count || d.count > 10;
+               if (!isCollapsing) {
+                 var containerWidth = container.node().getBoundingClientRect().width;
+                 var widthPct = sidebarWidth / containerWidth * 100;
+                 selection.style(xMarginProperty, null).style('width', widthPct + '%');
+               }
              });
-             var deprecatedValues = osmEntity.deprecatedTagValuesByKey(_dataDeprecated)[field.key];
+           }; // toggle the sidebar collapse when double-clicking the resizer
 
-             if (deprecatedValues) {
-               // don't suggest deprecated tag values
-               data = data.filter(function (d) {
-                 return deprecatedValues.indexOf(d.value) === -1;
-               });
-             }
 
-             if (hasCountryPrefix) {
-               data = data.filter(function (d) {
-                 return d.value.toLowerCase().indexOf(_countryCode + ':') === 0;
-               });
-             } // hide the caret if there are no suggestions
+           resizer.on('dblclick', function (d3_event) {
+             d3_event.preventDefault();
 
+             if (d3_event.sourceEvent) {
+               d3_event.sourceEvent.preventDefault();
+             }
 
-             _container.classed('empty-combobox', data.length === 0);
+             sidebar.toggle();
+           }); // ensure hover sidebar is closed when zooming out beyond editable zoom
 
-             _comboData = data.map(function (d) {
-               var k = d.value;
-               if (_isMulti) k = k.replace(field.key, '');
-               var v = _snake_case ? unsnake(k) : k;
-               return {
-                 key: k,
-                 value: v,
-                 title: _isMulti ? v : d.title
-               };
-             });
-             _comboData = objectDifference(_comboData, _multiData);
-             if (callback) callback(_comboData);
+           context.map().on('crossEditableZoom.sidebar', function (within) {
+             if (!within && !selection.select('.inspector-hover').empty()) {
+               hover([]);
+             }
            });
          }
 
-         function setPlaceholder(values) {
-           if (_isMulti || _isSemi) {
-             _staticPlaceholder = field.placeholder() || _t('inspector.add');
-           } else {
-             var vals = values.map(function (d) {
-               return d.value;
-             }).filter(function (s) {
-               return s.length < 20;
-             });
-             var placeholders = vals.length > 1 ? vals : values.map(function (d) {
-               return d.key;
-             });
-             _staticPlaceholder = field.placeholder() || placeholders.slice(0, 3).join(', ');
-           }
+         sidebar.showPresetList = function () {};
 
-           if (!/(…|\.\.\.)$/.test(_staticPlaceholder)) {
-             _staticPlaceholder += '…';
-           }
+         sidebar.hover = function () {};
 
-           var ph;
+         sidebar.hover.cancel = function () {};
 
-           if (!_isMulti && !_isSemi && _tags && Array.isArray(_tags[field.key])) {
-             ph = _t('inspector.multiple_values');
-           } else {
-             ph = _staticPlaceholder;
-           }
+         sidebar.intersects = function () {};
 
-           _container.selectAll('input').attr('placeholder', ph);
-         }
+         sidebar.select = function () {};
 
-         function change() {
-           var t = {};
-           var val;
+         sidebar.show = function () {};
 
-           if (_isMulti || _isSemi) {
-             val = tagValue(utilGetSetValue(_input).replace(/,/g, ';')) || '';
+         sidebar.hide = function () {};
 
-             _container.classed('active', false);
+         sidebar.expand = function () {};
 
-             utilGetSetValue(_input, '');
-             var vals = val.split(';').filter(Boolean);
-             if (!vals.length) return;
+         sidebar.collapse = function () {};
 
-             if (_isMulti) {
-               utilArrayUniq(vals).forEach(function (v) {
-                 var key = (field.key || '') + v;
+         sidebar.toggle = function () {};
 
-                 if (_tags) {
-                   // don't set a multicombo value to 'yes' if it already has a non-'no' value
-                   // e.g. `language:de=main`
-                   var old = _tags[key];
-                   if (typeof old === 'string' && old.toLowerCase() !== 'no') return;
-                 }
+         return sidebar;
+       }
 
-                 key = context.cleanTagKey(key);
-                 field.keys.push(key);
-                 t[key] = 'yes';
-               });
-             } else if (_isSemi) {
-               var arr = _multiData.map(function (d) {
-                 return d.key;
-               });
+       function modeDrawArea(context, wayID, startGraph, button) {
+         var mode = {
+           button: button,
+           id: 'draw-area'
+         };
+         var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawArea', function () {
+           context.ui().flash.iconName('#iD-icon-no').label(_t.html('self_intersection.error.areas'))();
+         });
+         mode.wayID = wayID;
 
-               arr = arr.concat(vals);
-               t[field.key] = context.cleanTagValue(utilArrayUniq(arr).filter(Boolean).join(';'));
-             }
+         mode.enter = function () {
+           context.install(behavior);
+         };
 
-             window.setTimeout(function () {
-               _input.node().focus();
-             }, 10);
-           } else {
-             var rawValue = utilGetSetValue(_input); // don't override multiple values with blank string
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-             if (!rawValue && Array.isArray(_tags[field.key])) return;
-             val = context.cleanTagValue(tagValue(rawValue));
-             t[field.key] = val || undefined;
-           }
+         mode.selectedIDs = function () {
+           return [wayID];
+         };
 
-           dispatch$1.call('change', this, t);
-         }
+         mode.activeID = function () {
+           return behavior && behavior.activeID() || [];
+         };
 
-         function removeMultikey(d3_event, d) {
-           d3_event.preventDefault();
-           d3_event.stopPropagation();
-           var t = {};
+         return mode;
+       }
 
-           if (_isMulti) {
-             t[d.key] = undefined;
-           } else if (_isSemi) {
-             var arr = _multiData.map(function (md) {
-               return md.key === d.key ? null : md.key;
-             }).filter(Boolean);
+       function modeAddArea(context, mode) {
+         mode.id = 'add-area';
+         var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+         var defaultTags = {
+           area: 'yes'
+         };
+         if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'area');
 
-             arr = utilArrayUniq(arr);
-             t[field.key] = arr.length ? arr.join(';') : undefined;
-           }
+         function actionClose(wayId) {
+           return function (graph) {
+             return graph.replace(graph.entity(wayId).close());
+           };
+         }
 
-           dispatch$1.call('change', this, t);
+         function start(loc) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
+           });
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
          }
 
-         function combo(selection) {
-           _container = selection.selectAll('.form-field-input-wrap').data([0]);
-           var type = _isMulti || _isSemi ? 'multicombo' : 'combo';
-           _container = _container.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + type).merge(_container);
+         function startFromWay(loc, edge) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
+           });
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id), actionAddMidpoint({
+             loc: loc,
+             edge: edge
+           }, node));
+           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+         }
 
-           if (_isMulti || _isSemi) {
-             _container = _container.selectAll('.chiplist').data([0]);
-             var listClass = 'chiplist'; // Use a separate line for each value in the Destinations field
-             // to mimic highway exit signs
+         function startFromNode(node) {
+           var startGraph = context.graph();
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
+           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
+         }
 
-             if (field.key === 'destination') {
-               listClass += ' full-line-chips';
-             }
+         mode.enter = function () {
+           context.install(behavior);
+         };
 
-             _container = _container.enter().append('ul').attr('class', listClass).on('click', function () {
-               window.setTimeout(function () {
-                 _input.node().focus();
-               }, 10);
-             }).merge(_container);
-             _inputWrap = _container.selectAll('.input-wrap').data([0]);
-             _inputWrap = _inputWrap.enter().append('li').attr('class', 'input-wrap').merge(_inputWrap);
-             _input = _inputWrap.selectAll('input').data([0]);
-           } else {
-             _input = _container.selectAll('input').data([0]);
-           }
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-           _input = _input.enter().append('input').attr('type', 'text').attr('id', field.domId).call(utilNoAuto).call(initCombo, selection).merge(_input);
+         return mode;
+       }
 
-           if (_isNetwork) {
-             var extent = combinedEntityExtent();
-             var countryCode = extent && iso1A2Code(extent.center());
-             _countryCode = countryCode && countryCode.toLowerCase();
-           }
+       function modeAddLine(context, mode) {
+         mode.id = 'add-line';
+         var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
+         var defaultTags = {};
+         if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'line');
+
+         function start(loc) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
+           });
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id));
+           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+         }
 
-           _input.on('change', change).on('blur', change);
+         function startFromWay(loc, edge) {
+           var startGraph = context.graph();
+           var node = osmNode({
+             loc: loc
+           });
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionAddMidpoint({
+             loc: loc,
+             edge: edge
+           }, node));
+           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+         }
 
-           _input.on('keydown.field', function (d3_event) {
-             switch (d3_event.keyCode) {
-               case 13:
-                 // ↩ Return
-                 _input.node().blur(); // blurring also enters the value
+         function startFromNode(node) {
+           var startGraph = context.graph();
+           var way = osmWay({
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id));
+           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
+         }
 
+         mode.enter = function () {
+           context.install(behavior);
+         };
 
-                 d3_event.stopPropagation();
-                 break;
-             }
-           });
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-           if (_isMulti || _isSemi) {
-             _combobox.on('accept', function () {
-               _input.node().blur();
+         return mode;
+       }
 
-               _input.node().focus();
-             });
+       function modeAddPoint(context, mode) {
+         mode.id = 'add-point';
+         var behavior = behaviorDraw(context).on('click', add).on('clickWay', addWay).on('clickNode', addNode).on('cancel', cancel).on('finish', cancel);
+         var defaultTags = {};
+         if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'point');
 
-             _input.on('focus', function () {
-               _container.classed('active', true);
-             });
-           }
+         function add(loc) {
+           var node = osmNode({
+             loc: loc,
+             tags: defaultTags
+           });
+           context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
+           enterSelectMode(node);
          }
 
-         combo.tags = function (tags) {
-           _tags = tags;
+         function addWay(loc, edge) {
+           var node = osmNode({
+             tags: defaultTags
+           });
+           context.perform(actionAddMidpoint({
+             loc: loc,
+             edge: edge
+           }, node), _t('operations.add.annotation.vertex'));
+           enterSelectMode(node);
+         }
 
-           if (_isMulti || _isSemi) {
-             _multiData = [];
-             var maxLength;
+         function enterSelectMode(node) {
+           context.enter(modeSelect(context, [node.id]).newFeature(true));
+         }
 
-             if (_isMulti) {
-               // Build _multiData array containing keys already set..
-               for (var k in tags) {
-                 if (field.key && k.indexOf(field.key) !== 0 || field.keys.indexOf(k) === -1) continue;
-                 var v = tags[k];
-                 if (!v || typeof v === 'string' && v.toLowerCase() === 'no') continue;
-                 var suffix = field.key ? k.substring(field.key.length) : k;
+         function addNode(node) {
+           if (Object.keys(defaultTags).length === 0) {
+             enterSelectMode(node);
+             return;
+           }
 
-                 _multiData.push({
-                   key: k,
-                   value: displayValue(suffix),
-                   isMixed: Array.isArray(v)
-                 });
-               }
+           var tags = Object.assign({}, node.tags); // shallow copy
 
-               if (field.key) {
-                 // Set keys for form-field modified (needed for undo and reset buttons)..
-                 field.keys = _multiData.map(function (d) {
-                   return d.key;
-                 }); // limit the input length so it fits after prepending the key prefix
+           for (var key in defaultTags) {
+             tags[key] = defaultTags[key];
+           }
 
-                 maxLength = context.maxCharsForTagKey() - utilUnicodeCharsCount(field.key);
-               } else {
-                 maxLength = context.maxCharsForTagKey();
-               }
-             } else if (_isSemi) {
-               var allValues = [];
-               var commonValues;
+           context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
+           enterSelectMode(node);
+         }
 
-               if (Array.isArray(tags[field.key])) {
-                 tags[field.key].forEach(function (tagVal) {
-                   var thisVals = utilArrayUniq((tagVal || '').split(';')).filter(Boolean);
-                   allValues = allValues.concat(thisVals);
+         function cancel() {
+           context.enter(modeBrowse(context));
+         }
 
-                   if (!commonValues) {
-                     commonValues = thisVals;
-                   } else {
-                     commonValues = commonValues.filter(function (value) {
-                       return thisVals.includes(value);
-                     });
-                   }
-                 });
-                 allValues = utilArrayUniq(allValues).filter(Boolean);
-               } else {
-                 allValues = utilArrayUniq((tags[field.key] || '').split(';')).filter(Boolean);
-                 commonValues = allValues;
-               }
+         mode.enter = function () {
+           context.install(behavior);
+         };
 
-               _multiData = allValues.map(function (v) {
-                 return {
-                   key: v,
-                   value: displayValue(v),
-                   isMixed: !commonValues.includes(v)
-                 };
-               });
-               var currLength = utilUnicodeCharsCount(commonValues.join(';')); // limit the input length to the remaining available characters
+         mode.exit = function () {
+           context.uninstall(behavior);
+         };
 
-               maxLength = context.maxCharsForTagValue() - currLength;
+         return mode;
+       }
 
-               if (currLength > 0) {
-                 // account for the separator if a new value will be appended to existing
-                 maxLength -= 1;
-               }
-             } // a negative maxlength doesn't make sense
+       function modeSelectNote(context, selectedNoteID) {
+         var mode = {
+           id: 'select-note',
+           button: 'browse'
+         };
 
+         var _keybinding = utilKeybinding('select-note');
 
-             maxLength = Math.max(0, maxLength);
-             var allowDragAndDrop = _isSemi // only semiCombo values are ordered
-             && !Array.isArray(tags[field.key]); // Exclude existing multikeys from combo options..
+         var _noteEditor = uiNoteEditor(context).on('change', function () {
+           context.map().pan([0, 0]); // trigger a redraw
 
-             var available = objectDifference(_comboData, _multiData);
+           var note = checkSelectedID();
+           if (!note) return;
+           context.ui().sidebar.show(_noteEditor.note(note));
+         });
 
-             _combobox.data(available); // Hide 'Add' button if this field uses fixed set of
-             // translateable _optstrings and they're all currently used,
-             // or if the field is already at its character limit
+         var _behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+         var _newFeature = false;
 
+         function checkSelectedID() {
+           if (!services.osm) return;
+           var note = services.osm.getNote(selectedNoteID);
 
-             var hideAdd = _optstrings && !available.length || maxLength <= 0;
+           if (!note) {
+             context.enter(modeBrowse(context));
+           }
 
-             _container.selectAll('.chiplist .input-wrap').style('display', hideAdd ? 'none' : null); // Render chips
+           return note;
+         } // class the note as selected, or return to browse mode if the note is gone
 
 
-             var chips = _container.selectAll('.chip').data(_multiData);
+         function selectNote(d3_event, drawn) {
+           if (!checkSelectedID()) return;
+           var selection = context.surface().selectAll('.layer-notes .note-' + selectedNoteID);
 
-             chips.exit().remove();
-             var enter = chips.enter().insert('li', '.input-wrap').attr('class', 'chip');
-             enter.append('span');
-             enter.append('a');
-             chips = chips.merge(enter).order().classed('draggable', allowDragAndDrop).classed('mixed', function (d) {
-               return d.isMixed;
-             }).attr('title', function (d) {
-               return d.isMixed ? _t('inspector.unshared_value_tooltip') : null;
-             });
+           if (selection.empty()) {
+             // Return to browse mode if selected DOM elements have
+             // disappeared because the user moved them out of view..
+             var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-             if (allowDragAndDrop) {
-               registerDragAndDrop(chips);
+             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+               context.enter(modeBrowse(context));
              }
-
-             chips.select('span').html(function (d) {
-               return d.value;
-             });
-             chips.select('a').attr('href', '#').on('click', removeMultikey).attr('class', 'remove').html('×');
            } else {
-             var isMixed = Array.isArray(tags[field.key]);
-             var mixedValues = isMixed && tags[field.key].map(function (val) {
-               return displayValue(val);
-             }).filter(Boolean);
-             utilGetSetValue(_input, !isMixed ? displayValue(tags[field.key]) : '').attr('title', isMixed ? mixedValues.join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : _staticPlaceholder || '').classed('mixed', isMixed);
+             selection.classed('selected', true);
+             context.selectedNoteID(selectedNoteID);
            }
-         };
-
-         function registerDragAndDrop(selection) {
-           // allow drag and drop re-ordering of chips
-           var dragOrigin, targetIndex;
-           selection.call(d3_drag().on('start', function (d3_event) {
-             dragOrigin = {
-               x: d3_event.x,
-               y: d3_event.y
-             };
-             targetIndex = null;
-           }).on('drag', function (d3_event) {
-             var x = d3_event.x - dragOrigin.x,
-                 y = d3_event.y - dragOrigin.y;
-             if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
-             Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
-             var index = selection.nodes().indexOf(this);
-             select(this).classed('dragging', true);
-             targetIndex = null;
-             var targetIndexOffsetTop = null;
-             var draggedTagWidth = select(this).node().offsetWidth;
-
-             if (field.key === 'destination') {
-               // meaning tags are full width
-               _container.selectAll('.chip').style('transform', function (d2, index2) {
-                 var node = select(this).node();
-
-                 if (index === index2) {
-                   return 'translate(' + x + 'px, ' + y + 'px)'; // move the dragged tag up the order
-                 } else if (index2 > index && d3_event.y > node.offsetTop) {
-                   if (targetIndex === null || index2 > targetIndex) {
-                     targetIndex = index2;
-                   }
-
-                   return 'translateY(-100%)'; // move the dragged tag down the order
-                 } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
-                   if (targetIndex === null || index2 < targetIndex) {
-                     targetIndex = index2;
-                   }
+         }
 
-                   return 'translateY(100%)';
-                 }
+         function esc() {
+           if (context.container().select('.combobox').size()) return;
+           context.enter(modeBrowse(context));
+         }
 
-                 return null;
-               });
-             } else {
-               _container.selectAll('.chip').each(function (d2, index2) {
-                 var node = select(this).node(); // check the cursor is in the bounding box
+         mode.zoomToSelected = function () {
+           if (!services.osm) return;
+           var note = services.osm.getNote(selectedNoteID);
 
-                 if (index !== index2 && d3_event.x < node.offsetLeft + node.offsetWidth + 5 && d3_event.x > node.offsetLeft && d3_event.y < node.offsetTop + node.offsetHeight && d3_event.y > node.offsetTop) {
-                   targetIndex = index2;
-                   targetIndexOffsetTop = node.offsetTop;
-                 }
-               }).style('transform', function (d2, index2) {
-                 var node = select(this).node();
+           if (note) {
+             context.map().centerZoomEase(note.loc, 20);
+           }
+         };
 
-                 if (index === index2) {
-                   return 'translate(' + x + 'px, ' + y + 'px)';
-                 } // only translate tags in the same row
+         mode.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return mode;
+         };
 
+         mode.enter = function () {
+           var note = checkSelectedID();
+           if (!note) return;
 
-                 if (node.offsetTop === targetIndexOffsetTop) {
-                   if (index2 < index && index2 >= targetIndex) {
-                     return 'translateX(' + draggedTagWidth + 'px)';
-                   } else if (index2 > index && index2 <= targetIndex) {
-                     return 'translateX(-' + draggedTagWidth + 'px)';
-                   }
-                 }
+           _behaviors.forEach(context.install);
 
-                 return null;
-               });
-             }
-           }).on('end', function () {
-             if (!select(this).classed('dragging')) {
-               return;
-             }
+           _keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
 
-             var index = selection.nodes().indexOf(this);
-             select(this).classed('dragging', false);
+           select(document).call(_keybinding);
+           selectNote();
+           var sidebar = context.ui().sidebar;
+           sidebar.show(_noteEditor.note(note).newNote(_newFeature)); // expand the sidebar, avoid obscuring the note if needed
 
-             _container.selectAll('.chip').style('transform', null);
+           sidebar.expand(sidebar.intersects(note.extent()));
+           context.map().on('drawn.select', selectNote);
+         };
 
-             if (typeof targetIndex === 'number') {
-               var element = _multiData[index];
+         mode.exit = function () {
+           _behaviors.forEach(context.uninstall);
 
-               _multiData.splice(index, 1);
+           select(document).call(_keybinding.unbind);
+           context.surface().selectAll('.layer-notes .selected').classed('selected hover', false);
+           context.map().on('drawn.select', null);
+           context.ui().sidebar.hide();
+           context.selectedNoteID(null);
+         };
 
-               _multiData.splice(targetIndex, 0, element);
+         return mode;
+       }
 
-               var t = {};
+       function modeAddNote(context) {
+         var mode = {
+           id: 'add-note',
+           button: 'note',
+           description: _t.html('modes.add_note.description'),
+           key: _t('modes.add_note.key')
+         };
+         var behavior = behaviorDraw(context).on('click', add).on('cancel', cancel).on('finish', cancel);
 
-               if (_multiData.length) {
-                 t[field.key] = _multiData.map(function (element) {
-                   return element.key;
-                 }).join(';');
-               } else {
-                 t[field.key] = undefined;
-               }
+         function add(loc) {
+           var osm = services.osm;
+           if (!osm) return;
+           var note = osmNote({
+             loc: loc,
+             status: 'open',
+             comments: []
+           });
+           osm.replaceNote(note); // force a reraw (there is no history change that would otherwise do this)
 
-               dispatch$1.call('change', this, t);
-             }
+           context.map().pan([0, 0]);
+           context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
+         }
 
-             dragOrigin = undefined;
-             targetIndex = undefined;
-           }));
+         function cancel() {
+           context.enter(modeBrowse(context));
          }
 
-         combo.focus = function () {
-           _input.node().focus();
+         mode.enter = function () {
+           context.install(behavior);
          };
 
-         combo.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return combo;
+         mode.exit = function () {
+           context.uninstall(behavior);
          };
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-         }
-
-         return utilRebind(combo, dispatch$1, 'on');
+         return mode;
        }
 
-       function uiFieldText(field, context) {
-         var dispatch$1 = dispatch('change');
-         var input = select(null);
-         var outlinkButton = select(null);
-         var _entityIDs = [];
+       function modeSave(context) {
+         var mode = {
+           id: 'save'
+         };
+         var keybinding = utilKeybinding('modeSave');
+         var commit = uiCommit(context).on('cancel', cancel);
 
-         var _tags;
+         var _conflictsUi; // uiConflicts
 
-         var _phoneFormats = {};
 
-         if (field.type === 'tel') {
-           _mainFileFetcher.get('phone_formats').then(function (d) {
-             _phoneFormats = d;
-             updatePhonePlaceholder();
-           })["catch"](function () {
-             /* ignore */
-           });
-         }
+         var _location;
 
-         function i(selection) {
-           var entity = _entityIDs.length && context.hasEntity(_entityIDs[0]);
-           var preset = entity && _mainPresetIndex.match(entity, context.graph());
-           var isLocked = preset && preset.suggestion && field.id === 'brand';
-           field.locked(isLocked);
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           input = wrap.selectAll('input').data([0]);
-           input = input.enter().append('input').attr('type', field.type === 'identifier' ? 'text' : field.type).attr('id', field.domId).classed(field.type, true).call(utilNoAuto).merge(input);
-           input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
+         var _success;
 
-           if (field.type === 'tel') {
-             updatePhonePlaceholder();
-           } else if (field.type === 'number') {
-             var rtl = _mainLocalizer.textDirection() === 'rtl';
-             input.attr('type', 'text');
-             var inc = field.increment;
-             var buttons = wrap.selectAll('.increment, .decrement').data(rtl ? [inc, -inc] : [-inc, inc]);
-             buttons.enter().append('button').attr('class', function (d) {
-               var which = d > 0 ? 'increment' : 'decrement';
-               return 'form-field-button ' + which;
-             }).merge(buttons).on('click', function (d3_event, d) {
-               d3_event.preventDefault();
-               var raw_vals = input.node().value || '0';
-               var vals = raw_vals.split(';');
-               vals = vals.map(function (v) {
-                 var num = parseFloat(v.trim(), 10);
-                 return isFinite(num) ? clamped(num + d) : v.trim();
-               });
-               input.node().value = vals.join(';');
-               change()();
-             });
-           } else if (field.type === 'identifier' && field.urlFormat && field.pattern) {
-             input.attr('type', 'text');
-             outlinkButton = wrap.selectAll('.foreign-id-permalink').data([0]);
-             outlinkButton.enter().append('button').call(svgIcon('#iD-icon-out-link')).attr('class', 'form-field-button foreign-id-permalink').attr('title', function () {
-               var domainResults = /^https?:\/\/(.{1,}?)\//.exec(field.urlFormat);
+         var uploader = context.uploader().on('saveStarted.modeSave', function () {
+           keybindingOff();
+         }) // fire off some async work that we want to be ready later
+         .on('willAttemptUpload.modeSave', prepareForSuccess).on('progressChanged.modeSave', showProgress).on('resultNoChanges.modeSave', function () {
+           cancel();
+         }).on('resultErrors.modeSave', showErrors).on('resultConflicts.modeSave', showConflicts).on('resultSuccess.modeSave', showSuccess);
 
-               if (domainResults.length >= 2 && domainResults[1]) {
-                 var domain = domainResults[1];
-                 return _t('icons.view_on', {
-                   domain: domain
-                 });
-               }
+         function cancel() {
+           context.enter(modeBrowse(context));
+         }
 
-               return '';
-             }).on('click', function (d3_event) {
-               d3_event.preventDefault();
-               var value = validIdentifierValueForLink();
+         function showProgress(num, total) {
+           var modal = context.container().select('.loading-modal .modal-section');
+           var progress = modal.selectAll('.progress').data([0]); // enter/update
 
-               if (value) {
-                 var url = field.urlFormat.replace(/{value}/, encodeURIComponent(value));
-                 window.open(url, '_blank');
-               }
-             }).merge(outlinkButton);
-           }
+           progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
+             num: num,
+             total: total
+           }));
          }
 
-         function updatePhonePlaceholder() {
-           if (input.empty() || !Object.keys(_phoneFormats).length) return;
-           var extent = combinedEntityExtent();
-           var countryCode = extent && iso1A2Code(extent.center());
+         function showConflicts(changeset, conflicts, origChanges) {
+           var selection = context.container().select('.sidebar').append('div').attr('class', 'sidebar-component');
+           context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+           _conflictsUi = uiConflicts(context).conflictList(conflicts).origChanges(origChanges).on('cancel', function () {
+             context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+             selection.remove();
+             keybindingOn();
+             uploader.cancelConflictResolution();
+           }).on('save', function () {
+             context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+             selection.remove();
+             uploader.processResolvedConflicts(changeset);
+           });
+           selection.call(_conflictsUi);
+         }
 
-           var format = countryCode && _phoneFormats[countryCode.toLowerCase()];
+         function showErrors(errors) {
+           keybindingOn();
+           var selection = uiConfirm(context.container());
+           selection.select('.modal-section.header').append('h3').text(_t('save.error'));
+           addErrors(selection, errors);
+           selection.okButton();
+         }
 
-           if (format) input.attr('placeholder', format);
+         function addErrors(selection, data) {
+           var message = selection.select('.modal-section.message-text');
+           var items = message.selectAll('.error-container').data(data);
+           var enter = items.enter().append('div').attr('class', 'error-container');
+           enter.append('a').attr('class', 'error-description').attr('href', '#').classed('hide-toggle', true).text(function (d) {
+             return d.msg || _t('save.unknown_error_details');
+           }).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             var error = select(this);
+             var detail = select(this.nextElementSibling);
+             var exp = error.classed('expanded');
+             detail.style('display', exp ? 'none' : 'block');
+             error.classed('expanded', !exp);
+           });
+           var details = enter.append('div').attr('class', 'error-detail-container').style('display', 'none');
+           details.append('ul').attr('class', 'error-detail-list').selectAll('li').data(function (d) {
+             return d.details || [];
+           }).enter().append('li').attr('class', 'error-detail-item').text(function (d) {
+             return d;
+           });
+           items.exit().remove();
          }
 
-         function validIdentifierValueForLink() {
-           if (field.type === 'identifier' && field.pattern) {
-             var value = utilGetSetValue(input).trim().split(';')[0];
-             return value && value.match(new RegExp(field.pattern));
-           }
-
-           return null;
-         } // clamp number to min/max
-
-
-         function clamped(num) {
-           if (field.minValue !== undefined) {
-             num = Math.max(num, field.minValue);
-           }
+         function showSuccess(changeset) {
+           commit.reset();
 
-           if (field.maxValue !== undefined) {
-             num = Math.min(num, field.maxValue);
-           }
+           var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
+             context.ui().sidebar.hide();
+           });
 
-           return num;
+           context.enter(modeBrowse(context).sidebar(ui));
          }
 
-         function change(onInput) {
-           return function () {
-             var t = {};
-             var val = utilGetSetValue(input);
-             if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
-
-             if (!val && Array.isArray(_tags[field.key])) return;
+         function keybindingOn() {
+           select(document).call(keybinding.on('⎋', cancel, true));
+         }
 
-             if (!onInput) {
-               if (field.type === 'number' && val) {
-                 var vals = val.split(';');
-                 vals = vals.map(function (v) {
-                   var num = parseFloat(v.trim(), 10);
-                   return isFinite(num) ? clamped(num) : v.trim();
-                 });
-                 val = vals.join(';');
-               }
+         function keybindingOff() {
+           select(document).call(keybinding.unbind);
+         } // Reverse geocode current map location so we can display a message on
+         // the success screen like "Thank you for editing around place, region."
 
-               utilGetSetValue(input, val);
-             }
 
-             t[field.key] = val || undefined;
-             dispatch$1.call('change', this, t, onInput);
-           };
+         function prepareForSuccess() {
+           _success = uiSuccess(context);
+           _location = null;
+           if (!services.geocoder) return;
+           services.geocoder.reverse(context.map().center(), function (err, result) {
+             if (err || !result || !result.address) return;
+             var addr = result.address;
+             var place = addr && (addr.town || addr.city || addr.county) || '';
+             var region = addr && (addr.state || addr.country) || '';
+             var separator = place && region ? _t('success.thank_you_where.separator') : '';
+             _location = _t('success.thank_you_where.format', {
+               place: place,
+               separator: separator,
+               region: region
+             });
+           });
          }
 
-         i.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return i;
+         mode.selectedIDs = function () {
+           return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
          };
 
-         i.tags = function (tags) {
-           _tags = tags;
-           var isMixed = Array.isArray(tags[field.key]);
-           utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
+         mode.enter = function () {
+           // Show sidebar
+           context.ui().sidebar.expand();
 
-           if (outlinkButton && !outlinkButton.empty()) {
-             var disabled = !validIdentifierValueForLink();
-             outlinkButton.classed('disabled', disabled);
+           function done() {
+             context.ui().sidebar.show(commit);
            }
-         };
 
-         i.focus = function () {
-           var node = input.node();
-           if (node) node.focus();
+           keybindingOn();
+           context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
+           var osm = context.connection();
+
+           if (!osm) {
+             cancel();
+             return;
+           }
+
+           if (osm.authenticated()) {
+             done();
+           } else {
+             osm.authenticate(function (err) {
+               if (err) {
+                 cancel();
+               } else {
+                 done();
+               }
+             });
+           }
          };
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-         }
+         mode.exit = function () {
+           keybindingOff();
+           context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
+           context.ui().sidebar.hide();
+         };
 
-         return utilRebind(i, dispatch$1, 'on');
+         return mode;
        }
 
-       function uiFieldAccess(field, context) {
-         var dispatch$1 = dispatch('change');
-         var items = select(null);
+       function modeSelectError(context, selectedErrorID, selectedErrorService) {
+         var mode = {
+           id: 'select-error',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('select-error');
+         var errorService = services[selectedErrorService];
+         var errorEditor;
 
-         var _tags;
+         switch (selectedErrorService) {
+           case 'improveOSM':
+             errorEditor = uiImproveOsmEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw
 
-         function access(selection) {
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           var list = wrap.selectAll('ul').data([0]);
-           list = list.enter().append('ul').attr('class', 'rows').merge(list);
-           items = list.selectAll('li').data(field.keys); // Enter
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
 
-           var enter = items.enter().append('li').attr('class', function (d) {
-             return 'labeled-input preset-access-' + d;
-           });
-           enter.append('span').attr('class', 'label preset-label-access').attr('for', function (d) {
-             return 'preset-input-access-' + d;
-           }).html(function (d) {
-             return field.t.html('types.' + d);
-           });
-           enter.append('div').attr('class', 'preset-input-access-wrap').append('input').attr('type', 'text').attr('class', function (d) {
-             return 'preset-input-access preset-input-access-' + d;
-           }).call(utilNoAuto).each(function (d) {
-             select(this).call(uiCombobox(context, 'access-' + d).data(access.options(d)));
-           }); // Update
+           case 'keepRight':
+             errorEditor = uiKeepRightEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw
 
-           items = items.merge(enter);
-           wrap.selectAll('.preset-input-access').on('change', change).on('blur', change);
-         }
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
 
-         function change(d3_event, d) {
-           var tag = {};
-           var value = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
+           case 'osmose':
+             errorEditor = uiOsmoseEditor(context).on('change', function () {
+               context.map().pan([0, 0]); // trigger a redraw
 
-           if (!value && typeof _tags[d] !== 'string') return;
-           tag[d] = value || undefined;
-           dispatch$1.call('change', this, tag);
+               var error = checkSelectedID();
+               if (!error) return;
+               context.ui().sidebar.show(errorEditor.error(error));
+             });
+             break;
          }
 
-         access.options = function (type) {
-           var options = ['no', 'permissive', 'private', 'permit', 'destination'];
+         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
 
-           if (type !== 'access') {
-             options.unshift('yes');
-             options.push('designated');
+         function checkSelectedID() {
+           if (!errorService) return;
+           var error = errorService.getError(selectedErrorID);
 
-             if (type === 'bicycle') {
-               options.push('dismount');
-             }
+           if (!error) {
+             context.enter(modeBrowse(context));
            }
 
-           return options.map(function (option) {
-             return {
-               title: field.t('options.' + option + '.description'),
-               value: option
-             };
-           });
-         };
+           return error;
+         }
 
-         var placeholdersByHighway = {
-           footway: {
-             foot: 'designated',
-             motor_vehicle: 'no'
-           },
-           steps: {
-             foot: 'yes',
-             motor_vehicle: 'no',
-             bicycle: 'no',
-             horse: 'no'
-           },
-           pedestrian: {
-             foot: 'yes',
-             motor_vehicle: 'no'
-           },
-           cycleway: {
-             motor_vehicle: 'no',
-             bicycle: 'designated'
-           },
-           bridleway: {
-             motor_vehicle: 'no',
-             horse: 'designated'
-           },
-           path: {
-             foot: 'yes',
-             motor_vehicle: 'no',
-             bicycle: 'yes',
-             horse: 'yes'
-           },
-           motorway: {
-             foot: 'no',
-             motor_vehicle: 'yes',
-             bicycle: 'no',
-             horse: 'no'
-           },
-           trunk: {
-             motor_vehicle: 'yes'
-           },
-           primary: {
-             foot: 'yes',
-             motor_vehicle: 'yes',
-             bicycle: 'yes',
-             horse: 'yes'
-           },
-           secondary: {
-             foot: 'yes',
-             motor_vehicle: 'yes',
-             bicycle: 'yes',
-             horse: 'yes'
-           },
-           tertiary: {
-             foot: 'yes',
-             motor_vehicle: 'yes',
-             bicycle: 'yes',
-             horse: 'yes'
-           },
-           residential: {
-             foot: 'yes',
-             motor_vehicle: 'yes',
-             bicycle: 'yes',
-             horse: 'yes'
-           },
-           unclassified: {
-             foot: 'yes',
-             motor_vehicle: 'yes',
-             bicycle: 'yes',
-             horse: 'yes'
-           },
-           service: {
-             foot: 'yes',
-             motor_vehicle: 'yes',
-             bicycle: 'yes',
-             horse: 'yes'
-           },
-           motorway_link: {
-             foot: 'no',
-             motor_vehicle: 'yes',
-             bicycle: 'no',
-             horse: 'no'
-           },
-           trunk_link: {
-             motor_vehicle: 'yes'
-           },
-           primary_link: {
-             foot: 'yes',
-             motor_vehicle: 'yes',
-             bicycle: 'yes',
-             horse: 'yes'
-           },
-           secondary_link: {
-             foot: 'yes',
-             motor_vehicle: 'yes',
-             bicycle: 'yes',
-             horse: 'yes'
-           },
-           tertiary_link: {
-             foot: 'yes',
-             motor_vehicle: 'yes',
-             bicycle: 'yes',
-             horse: 'yes'
+         mode.zoomToSelected = function () {
+           if (!errorService) return;
+           var error = errorService.getError(selectedErrorID);
+
+           if (error) {
+             context.map().centerZoomEase(error.loc, 20);
            }
          };
 
-         access.tags = function (tags) {
-           _tags = tags;
-           utilGetSetValue(items.selectAll('.preset-input-access'), function (d) {
-             return typeof tags[d] === 'string' ? tags[d] : '';
-           }).classed('mixed', function (d) {
-             return tags[d] && Array.isArray(tags[d]);
-           }).attr('title', function (d) {
-             return tags[d] && Array.isArray(tags[d]) && tags[d].filter(Boolean).join('\n');
-           }).attr('placeholder', function (d) {
-             if (tags[d] && Array.isArray(tags[d])) {
-               return _t('inspector.multiple_values');
-             }
-
-             if (d === 'access') {
-               return 'yes';
-             }
+         mode.enter = function () {
+           var error = checkSelectedID();
+           if (!error) return;
+           behaviors.forEach(context.install);
+           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+           select(document).call(keybinding);
+           selectError();
+           var sidebar = context.ui().sidebar;
+           sidebar.show(errorEditor.error(error));
+           context.map().on('drawn.select-error', selectError); // class the error as selected, or return to browse mode if the error is gone
 
-             if (tags.access && typeof tags.access === 'string') {
-               return tags.access;
-             }
+           function selectError(d3_event, drawn) {
+             if (!checkSelectedID()) return;
+             var selection = context.surface().selectAll('.itemId-' + selectedErrorID + '.' + selectedErrorService);
 
-             if (tags.highway) {
-               if (typeof tags.highway === 'string') {
-                 if (placeholdersByHighway[tags.highway] && placeholdersByHighway[tags.highway][d]) {
-                   return placeholdersByHighway[tags.highway][d];
-                 }
-               } else {
-                 var impliedAccesses = tags.highway.filter(Boolean).map(function (highwayVal) {
-                   return placeholdersByHighway[highwayVal] && placeholdersByHighway[highwayVal][d];
-                 }).filter(Boolean);
+             if (selection.empty()) {
+               // Return to browse mode if selected DOM elements have
+               // disappeared because the user moved them out of view..
+               var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-                 if (impliedAccesses.length === tags.highway.length && new Set(impliedAccesses).size === 1) {
-                   // if all the highway values have the same implied access for this type then use that
-                   return impliedAccesses[0];
-                 }
+               if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+                 context.enter(modeBrowse(context));
                }
+             } else {
+               selection.classed('selected', true);
+               context.selectedErrorID(selectedErrorID);
              }
+           }
 
-             return field.placeholder();
-           });
+           function esc() {
+             if (context.container().select('.combobox').size()) return;
+             context.enter(modeBrowse(context));
+           }
          };
 
-         access.focus = function () {
-           items.selectAll('.preset-input-access').node().focus();
+         mode.exit = function () {
+           behaviors.forEach(context.uninstall);
+           select(document).call(keybinding.unbind);
+           context.surface().selectAll('.qaItem.selected').classed('selected hover', false);
+           context.map().on('drawn.select-error', null);
+           context.ui().sidebar.hide();
+           context.selectedErrorID(null);
+           context.features().forceVisible([]);
          };
 
-         return utilRebind(access, dispatch$1, 'on');
+         return mode;
        }
 
-       function uiFieldAddress(field, context) {
-         var dispatch$1 = dispatch('change');
-
-         var _selection = select(null);
-
-         var _wrap = select(null);
-
-         var addrField = _mainPresetIndex.field('address'); // needed for placeholder strings
-
-         var _entityIDs = [];
-
-         var _tags;
-
-         var _countryCode;
-
-         var _addressFormats = [{
-           format: [['housenumber', 'street'], ['city', 'postcode']]
-         }];
-         _mainFileFetcher.get('address_formats').then(function (d) {
-           _addressFormats = d;
-
-           if (!_selection.empty()) {
-             _selection.call(address);
-           }
-         })["catch"](function () {
-           /* ignore */
-         });
+       function uiToolOldDrawModes(context) {
+         var tool = {
+           id: 'old_modes',
+           label: _t.html('toolbar.add_feature')
+         };
+         var modes = [modeAddPoint(context, {
+           title: _t.html('modes.add_point.title'),
+           button: 'point',
+           description: _t.html('modes.add_point.description'),
+           preset: _mainPresetIndex.item('point'),
+           key: '1'
+         }), modeAddLine(context, {
+           title: _t.html('modes.add_line.title'),
+           button: 'line',
+           description: _t.html('modes.add_line.description'),
+           preset: _mainPresetIndex.item('line'),
+           key: '2'
+         }), modeAddArea(context, {
+           title: _t.html('modes.add_area.title'),
+           button: 'area',
+           description: _t.html('modes.add_area.description'),
+           preset: _mainPresetIndex.item('area'),
+           key: '3'
+         })];
 
-         function getNearStreets() {
-           var extent = combinedEntityExtent();
-           var l = extent.center();
-           var box = geoExtent(l).padByMeters(200);
-           var streets = context.history().intersects(box).filter(isAddressable).map(function (d) {
-             var loc = context.projection([(extent[0][0] + extent[1][0]) / 2, (extent[0][1] + extent[1][1]) / 2]);
-             var choice = geoChooseEdge(context.graph().childNodes(d), loc, context.projection);
-             return {
-               title: d.tags.name,
-               value: d.tags.name,
-               dist: choice.distance
-             };
-           }).sort(function (a, b) {
-             return a.dist - b.dist;
-           });
-           return utilArrayUniqBy(streets, 'value');
+         function enabled() {
+           return osmEditable();
+         }
 
-           function isAddressable(d) {
-             return d.tags.highway && d.tags.name && d.type === 'way';
-           }
+         function osmEditable() {
+           return context.editable();
          }
 
-         function getNearCities() {
-           var extent = combinedEntityExtent();
-           var l = extent.center();
-           var box = geoExtent(l).padByMeters(200);
-           var cities = context.history().intersects(box).filter(isAddressable).map(function (d) {
-             return {
-               title: d.tags['addr:city'] || d.tags.name,
-               value: d.tags['addr:city'] || d.tags.name,
-               dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-             };
-           }).sort(function (a, b) {
-             return a.dist - b.dist;
-           });
-           return utilArrayUniqBy(cities, 'value');
+         modes.forEach(function (mode) {
+           context.keybinding().on(mode.key, function () {
+             if (!enabled()) return;
 
-           function isAddressable(d) {
-             if (d.tags.name) {
-               if (d.tags.admin_level === '8' && d.tags.boundary === 'administrative') return true;
-               if (d.tags.border_type === 'city') return true;
-               if (d.tags.place === 'city' || d.tags.place === 'town' || d.tags.place === 'village') return true;
+             if (mode.id === context.mode().id) {
+               context.enter(modeBrowse(context));
+             } else {
+               context.enter(mode);
              }
+           });
+         });
 
-             if (d.tags['addr:city']) return true;
-             return false;
-           }
-         }
+         tool.render = function (selection) {
+           var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
 
-         function getNearValues(key) {
-           var extent = combinedEntityExtent();
-           var l = extent.center();
-           var box = geoExtent(l).padByMeters(200);
-           var results = context.history().intersects(box).filter(function hasTag(d) {
-             return _entityIDs.indexOf(d.id) === -1 && d.tags[key];
-           }).map(function (d) {
-             return {
-               title: d.tags[key],
-               value: d.tags[key],
-               dist: geoSphericalDistance(d.extent(context.graph()).center(), l)
-             };
-           }).sort(function (a, b) {
-             return a.dist - b.dist;
-           });
-           return utilArrayUniqBy(results, 'value');
-         }
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });
 
-         function updateForCountryCode() {
-           if (!_countryCode) return;
-           var addressFormat;
+           context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
+           context.on('enter.modes', update);
+           update();
 
-           for (var i = 0; i < _addressFormats.length; i++) {
-             var format = _addressFormats[i];
+           function update() {
+             var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
+               return d.id;
+             }); // exit
 
-             if (!format.countryCodes) {
-               addressFormat = format; // choose the default format, keep going
-             } else if (format.countryCodes.indexOf(_countryCode) !== -1) {
-               addressFormat = format; // choose the country format, stop here
+             buttons.exit().remove(); // enter
 
-               break;
-             }
-           }
+             var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+               return d.id + ' add-button bar-button';
+             }).on('click.mode-buttons', function (d3_event, d) {
+               if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
 
-           var dropdowns = addressFormat.dropdowns || ['city', 'county', 'country', 'district', 'hamlet', 'neighbourhood', 'place', 'postcode', 'province', 'quarter', 'state', 'street', 'subdistrict', 'suburb'];
-           var widths = addressFormat.widths || {
-             housenumber: 1 / 3,
-             street: 2 / 3,
-             city: 2 / 3,
-             state: 1 / 4,
-             postcode: 1 / 3
-           };
+               var currMode = context.mode().id;
+               if (/^draw/.test(currMode)) return;
 
-           function row(r) {
-             // Normalize widths.
-             var total = r.reduce(function (sum, key) {
-               return sum + (widths[key] || 0.5);
-             }, 0);
-             return r.map(function (key) {
-               return {
-                 id: key,
-                 width: (widths[key] || 0.5) / total
-               };
+               if (d.id === currMode) {
+                 context.enter(modeBrowse(context));
+               } else {
+                 context.enter(d);
+               }
+             }).call(uiTooltip().placement('bottom').title(function (d) {
+               return d.description;
+             }).keys(function (d) {
+               return [d.key];
+             }).scrollContainer(context.container().select('.top-toolbar')));
+             buttonsEnter.each(function (d) {
+               select(this).call(svgIcon('#iD-icon-' + d.button));
              });
-           }
-
-           var rows = _wrap.selectAll('.addr-row').data(addressFormat.format, function (d) {
-             return d.toString();
-           });
+             buttonsEnter.append('span').attr('class', 'label').html(function (mode) {
+               return mode.title;
+             }); // if we are adding/removing the buttons, check if toolbar has overflowed
 
-           rows.exit().remove();
-           rows.enter().append('div').attr('class', 'addr-row').selectAll('input').data(row).enter().append('input').property('type', 'text').call(updatePlaceholder).attr('class', function (d) {
-             return 'addr-' + d.id;
-           }).call(utilNoAuto).each(addDropdown).style('width', function (d) {
-             return d.width * 100 + '%';
-           });
+             if (buttons.enter().size() || buttons.exit().size()) {
+               context.ui().checkOverflow('.top-toolbar', true);
+             } // update
 
-           function addDropdown(d) {
-             if (dropdowns.indexOf(d.id) === -1) return; // not a dropdown
 
-             var nearValues = d.id === 'street' ? getNearStreets : d.id === 'city' ? getNearCities : getNearValues;
-             select(this).call(uiCombobox(context, 'address-' + d.id).minItems(1).caseSensitive(true).fetcher(function (value, callback) {
-               callback(nearValues('addr:' + d.id));
-             }));
+             buttons = buttons.merge(buttonsEnter).attr('aria-disabled', function (d) {
+               return !enabled();
+             }).classed('disabled', function (d) {
+               return !enabled();
+             }).attr('aria-pressed', function (d) {
+               return context.mode() && context.mode().button === d.button;
+             }).classed('active', function (d) {
+               return context.mode() && context.mode().button === d.button;
+             });
            }
+         };
 
-           _wrap.selectAll('input').on('blur', change()).on('change', change());
+         return tool;
+       }
 
-           _wrap.selectAll('input:not(.combobox-input)').on('input', change(true));
+       function uiToolNotes(context) {
+         var tool = {
+           id: 'notes',
+           label: _t.html('modes.add_note.label')
+         };
+         var mode = modeAddNote(context);
 
-           if (_tags) updateTags(_tags);
+         function enabled() {
+           return notesEnabled() && notesEditable();
          }
 
-         function address(selection) {
-           _selection = selection;
-           _wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           _wrap = _wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(_wrap);
-           var extent = combinedEntityExtent();
+         function notesEnabled() {
+           var noteLayer = context.layers().layer('notes');
+           return noteLayer && noteLayer.enabled();
+         }
 
-           if (extent) {
-             var countryCode;
+         function notesEditable() {
+           var mode = context.mode();
+           return context.map().notesEditable() && mode && mode.id !== 'save';
+         }
 
-             if (context.inIntro()) {
-               // localize the address format for the walkthrough
-               countryCode = _t('intro.graph.countrycode');
-             } else {
-               var center = extent.center();
-               countryCode = iso1A2Code(center);
-             }
+         context.keybinding().on(mode.key, function () {
+           if (!enabled()) return;
 
-             if (countryCode) {
-               _countryCode = countryCode.toLowerCase();
-               updateForCountryCode();
-             }
+           if (mode.id === context.mode().id) {
+             context.enter(modeBrowse(context));
+           } else {
+             context.enter(mode);
            }
-         }
+         });
 
-         function change(onInput) {
-           return function () {
-             var tags = {};
+         tool.render = function (selection) {
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });
 
-             _wrap.selectAll('input').each(function (subfield) {
-               var key = field.key + ':' + subfield.id;
-               var value = this.value;
-               if (!onInput) value = context.cleanTagValue(value); // don't override multiple values with blank string
+           context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
+           context.on('enter.notes', update);
+           update();
 
-               if (Array.isArray(_tags[key]) && !value) return;
-               tags[key] = value || undefined;
-             });
+           function update() {
+             var showNotes = notesEnabled();
+             var data = showNotes ? [mode] : [];
+             var buttons = selection.selectAll('button.add-button').data(data, function (d) {
+               return d.id;
+             }); // exit
 
-             dispatch$1.call('change', this, tags, onInput);
-           };
-         }
+             buttons.exit().remove(); // enter
 
-         function updatePlaceholder(inputSelection) {
-           return inputSelection.attr('placeholder', function (subfield) {
-             if (_tags && Array.isArray(_tags[field.key + ':' + subfield.id])) {
-               return _t('inspector.multiple_values');
-             }
+             var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
+               return d.id + ' add-button bar-button';
+             }).on('click.notes', function (d3_event, d) {
+               if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
 
-             if (_countryCode) {
-               var localkey = subfield.id + '!' + _countryCode;
-               var tkey = addrField.strings.placeholders[localkey] ? localkey : subfield.id;
-               return addrField.t('placeholders.' + tkey);
-             }
-           });
-         }
+               var currMode = context.mode().id;
+               if (/^draw/.test(currMode)) return;
 
-         function updateTags(tags) {
-           utilGetSetValue(_wrap.selectAll('input'), function (subfield) {
-             var val = tags[field.key + ':' + subfield.id];
-             return typeof val === 'string' ? val : '';
-           }).attr('title', function (subfield) {
-             var val = tags[field.key + ':' + subfield.id];
-             return val && Array.isArray(val) && val.filter(Boolean).join('\n');
-           }).classed('mixed', function (subfield) {
-             return Array.isArray(tags[field.key + ':' + subfield.id]);
-           }).call(updatePlaceholder);
-         }
+               if (d.id === currMode) {
+                 context.enter(modeBrowse(context));
+               } else {
+                 context.enter(d);
+               }
+             }).call(uiTooltip().placement('bottom').title(function (d) {
+               return d.description;
+             }).keys(function (d) {
+               return [d.key];
+             }).scrollContainer(context.container().select('.top-toolbar')));
+             buttonsEnter.each(function (d) {
+               select(this).call(svgIcon(d.icon || '#iD-icon-' + d.button));
+             }); // if we are adding/removing the buttons, check if toolbar has overflowed
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
-         }
+             if (buttons.enter().size() || buttons.exit().size()) {
+               context.ui().checkOverflow('.top-toolbar', true);
+             } // update
 
-         address.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return address;
-         };
 
-         address.tags = function (tags) {
-           _tags = tags;
-           updateTags(tags);
+             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
+               return !enabled();
+             }).attr('aria-disabled', function (d) {
+               return !enabled();
+             }).classed('active', function (d) {
+               return context.mode() && context.mode().button === d.button;
+             }).attr('aria-pressed', function (d) {
+               return context.mode() && context.mode().button === d.button;
+             });
+           }
          };
 
-         address.focus = function () {
-           var node = _wrap.selectAll('input').node();
-
-           if (node) node.focus();
+         tool.uninstall = function () {
+           context.on('enter.editor.notes', null).on('exit.editor.notes', null).on('enter.notes', null);
+           context.map().on('move.notes', null).on('drawn.notes', null);
          };
 
-         return utilRebind(address, dispatch$1, 'on');
+         return tool;
        }
 
-       function uiFieldCycleway(field, context) {
-         var dispatch$1 = dispatch('change');
-         var items = select(null);
-         var wrap = select(null);
-
-         var _tags;
-
-         function cycleway(selection) {
-           function stripcolon(s) {
-             return s.replace(':', '');
-           }
-
-           wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           var div = wrap.selectAll('ul').data([0]);
-           div = div.enter().append('ul').attr('class', 'rows').merge(div);
-           var keys = ['cycleway:left', 'cycleway:right'];
-           items = div.selectAll('li').data(keys);
-           var enter = items.enter().append('li').attr('class', function (d) {
-             return 'labeled-input preset-cycleway-' + stripcolon(d);
-           });
-           enter.append('span').attr('class', 'label preset-label-cycleway').attr('for', function (d) {
-             return 'preset-input-cycleway-' + stripcolon(d);
-           }).html(function (d) {
-             return field.t.html('types.' + d);
-           });
-           enter.append('div').attr('class', 'preset-input-cycleway-wrap').append('input').attr('type', 'text').attr('class', function (d) {
-             return 'preset-input-cycleway preset-input-' + stripcolon(d);
-           }).call(utilNoAuto).each(function (d) {
-             select(this).call(uiCombobox(context, 'cycleway-' + stripcolon(d)).data(cycleway.options(d)));
-           });
-           items = items.merge(enter); // Update
+       function uiToolSave(context) {
+         var tool = {
+           id: 'save',
+           label: _t.html('save.title')
+         };
+         var button = null;
+         var tooltipBehavior = null;
+         var history = context.history();
+         var key = uiCmd('⌘S');
+         var _numChanges = 0;
 
-           wrap.selectAll('.preset-input-cycleway').on('change', change).on('blur', change);
+         function isSaving() {
+           var mode = context.mode();
+           return mode && mode.id === 'save';
          }
 
-         function change(d3_event, key) {
-           var newValue = context.cleanTagValue(utilGetSetValue(select(this))); // don't override multiple values with blank string
+         function isDisabled() {
+           return _numChanges === 0 || isSaving();
+         }
 
-           if (!newValue && (Array.isArray(_tags.cycleway) || Array.isArray(_tags[key]))) return;
+         function save(d3_event) {
+           d3_event.preventDefault();
 
-           if (newValue === 'none' || newValue === '') {
-             newValue = undefined;
+           if (!context.inIntro() && !isSaving() && history.hasChanges()) {
+             context.enter(modeSave(context));
            }
+         }
 
-           var otherKey = key === 'cycleway:left' ? 'cycleway:right' : 'cycleway:left';
-           var otherValue = typeof _tags.cycleway === 'string' ? _tags.cycleway : _tags[otherKey];
-
-           if (otherValue && Array.isArray(otherValue)) {
-             // we must always have an explicit value for comparison
-             otherValue = otherValue[0];
-           }
+         function bgColor() {
+           var step;
 
-           if (otherValue === 'none' || otherValue === '') {
-             otherValue = undefined;
+           if (_numChanges === 0) {
+             return null;
+           } else if (_numChanges <= 50) {
+             step = _numChanges / 50;
+             return d3_interpolateRgb('#fff', '#ff8')(step); // white -> yellow
+           } else {
+             step = Math.min((_numChanges - 50) / 50, 1.0);
+             return d3_interpolateRgb('#ff8', '#f88')(step); // yellow -> red
            }
+         }
 
-           var tag = {}; // If the left and right tags match, use the cycleway tag to tag both
-           // sides the same way
+         function updateCount() {
+           var val = history.difference().summary().length;
+           if (val === _numChanges) return;
+           _numChanges = val;
 
-           if (newValue === otherValue) {
-             tag = {
-               cycleway: newValue,
-               'cycleway:left': undefined,
-               'cycleway:right': undefined
-             };
-           } else {
-             // Always set both left and right as changing one can affect the other
-             tag = {
-               cycleway: undefined
-             };
-             tag[key] = newValue;
-             tag[otherKey] = otherValue;
+           if (tooltipBehavior) {
+             tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
            }
 
-           dispatch$1.call('change', this, tag);
+           if (button) {
+             button.classed('disabled', isDisabled()).style('background', bgColor());
+             button.select('span.count').text(_numChanges);
+           }
          }
 
-         cycleway.options = function () {
-           return Object.keys(field.strings.options).map(function (option) {
-             return {
-               title: field.t('options.' + option + '.description'),
-               value: option
-             };
-           });
-         };
-
-         cycleway.tags = function (tags) {
-           _tags = tags; // If cycleway is set, use that instead of individual values
+         tool.render = function (selection) {
+           tooltipBehavior = uiTooltip().placement('bottom').title(_t.html('save.no_changes')).keys([key]).scrollContainer(context.container().select('.top-toolbar'));
+           var lastPointerUpType;
+           button = selection.append('button').attr('class', 'save disabled bar-button').on('pointerup', function (d3_event) {
+             lastPointerUpType = d3_event.pointerType;
+           }).on('click', function (d3_event) {
+             save(d3_event);
 
-           var commonValue = typeof tags.cycleway === 'string' && tags.cycleway;
-           utilGetSetValue(items.selectAll('.preset-input-cycleway'), function (d) {
-             if (commonValue) return commonValue;
-             return !tags.cycleway && typeof tags[d] === 'string' ? tags[d] : '';
-           }).attr('title', function (d) {
-             if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-               var vals = [];
+             if (_numChanges === 0 && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+               // there are no tooltips for touch interactions so flash feedback instead
+               context.ui().flash.duration(2000).iconName('#iD-icon-save').iconClass('disabled').label(_t.html('save.no_changes'))();
+             }
 
-               if (Array.isArray(tags.cycleway)) {
-                 vals = vals.concat(tags.cycleway);
-               }
+             lastPointerUpType = null;
+           }).call(tooltipBehavior);
+           button.call(svgIcon('#iD-icon-save'));
+           button.append('span').attr('class', 'count').attr('aria-hidden', 'true').text('0');
+           updateCount();
+           context.keybinding().on(key, save, true);
+           context.history().on('change.save', updateCount);
+           context.on('enter.save', function () {
+             if (button) {
+               button.classed('disabled', isDisabled());
 
-               if (Array.isArray(tags[d])) {
-                 vals = vals.concat(tags[d]);
+               if (isSaving()) {
+                 button.call(tooltipBehavior.hide);
                }
-
-               return vals.filter(Boolean).join('\n');
              }
+           });
+         };
 
-             return null;
-           }).attr('placeholder', function (d) {
-             if (Array.isArray(tags.cycleway) || Array.isArray(tags[d])) {
-               return _t('inspector.multiple_values');
-             }
+         tool.uninstall = function () {
+           context.keybinding().off(key, true);
+           context.history().on('change.save', null);
+           context.on('enter.save', null);
+           button = null;
+           tooltipBehavior = null;
+         };
 
-             return field.placeholder();
-           }).classed('mixed', function (d) {
-             return Array.isArray(tags.cycleway) || Array.isArray(tags[d]);
-           });
+         return tool;
+       }
+
+       function uiToolSidebarToggle(context) {
+         var tool = {
+           id: 'sidebar_toggle',
+           label: _t.html('toolbar.inspect')
          };
 
-         cycleway.focus = function () {
-           var node = wrap.selectAll('input').node();
-           if (node) node.focus();
+         tool.render = function (selection) {
+           selection.append('button').attr('class', 'bar-button').attr('aria-label', _t('sidebar.tooltip')).on('click', function () {
+             context.ui().sidebar.toggle();
+           }).call(uiTooltip().placement('bottom').title(_t.html('sidebar.tooltip')).keys([_t('sidebar.key')]).scrollContainer(context.container().select('.top-toolbar'))).call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
          };
 
-         return utilRebind(cycleway, dispatch$1, 'on');
+         return tool;
        }
 
-       function uiFieldLanes(field, context) {
-         var dispatch$1 = dispatch('change');
-         var LANE_WIDTH = 40;
-         var LANE_HEIGHT = 200;
-         var _entityIDs = [];
+       function uiToolUndoRedo(context) {
+         var tool = {
+           id: 'undo_redo',
+           label: _t.html('toolbar.undo_redo')
+         };
+         var commands = [{
+           id: 'undo',
+           cmd: uiCmd('⌘Z'),
+           action: function action() {
+             context.undo();
+           },
+           annotation: function annotation() {
+             return context.history().undoAnnotation();
+           },
+           icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
+         }, {
+           id: 'redo',
+           cmd: uiCmd('⌘⇧Z'),
+           action: function action() {
+             context.redo();
+           },
+           annotation: function annotation() {
+             return context.history().redoAnnotation();
+           },
+           icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
+         }];
 
-         function lanes(selection) {
-           var lanesData = context.entity(_entityIDs[0]).lanes();
+         function editable() {
+           return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
+           /* ignore min zoom */
+           );
+         }
 
-           if (!context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode) {
-             selection.call(lanes.off);
-             return;
-           }
+         tool.render = function (selection) {
+           var tooltipBehavior = uiTooltip().placement('bottom').title(function (d) {
+             return d.annotation() ? _t.html(d.id + '.tooltip', {
+               action: d.annotation()
+             }) : _t.html(d.id + '.nothing');
+           }).keys(function (d) {
+             return [d.cmd];
+           }).scrollContainer(context.container().select('.top-toolbar'));
+           var lastPointerUpType;
+           var buttons = selection.selectAll('button').data(commands).enter().append('button').attr('class', function (d) {
+             return 'disabled ' + d.id + '-button bar-button';
+           }).on('pointerup', function (d3_event) {
+             // `pointerup` is always called before `click`
+             lastPointerUpType = d3_event.pointerType;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             var annotation = d.annotation();
 
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           var surface = wrap.selectAll('.surface').data([0]);
-           var d = utilGetDimensions(wrap);
-           var freeSpace = d[0] - lanesData.lanes.length * LANE_WIDTH * 1.5 + LANE_WIDTH * 0.5;
-           surface = surface.enter().append('svg').attr('width', d[0]).attr('height', 300).attr('class', 'surface').merge(surface);
-           var lanesSelection = surface.selectAll('.lanes').data([0]);
-           lanesSelection = lanesSelection.enter().append('g').attr('class', 'lanes').merge(lanesSelection);
-           lanesSelection.attr('transform', function () {
-             return 'translate(' + freeSpace / 2 + ', 0)';
-           });
-           var lane = lanesSelection.selectAll('.lane').data(lanesData.lanes);
-           lane.exit().remove();
-           var enter = lane.enter().append('g').attr('class', 'lane');
-           enter.append('g').append('rect').attr('y', 50).attr('width', LANE_WIDTH).attr('height', LANE_HEIGHT);
-           enter.append('g').attr('class', 'forward').append('text').attr('y', 40).attr('x', 14).html('▲');
-           enter.append('g').attr('class', 'bothways').append('text').attr('y', 40).attr('x', 14).html('▲▼');
-           enter.append('g').attr('class', 'backward').append('text').attr('y', 40).attr('x', 14).html('▼');
-           lane = lane.merge(enter);
-           lane.attr('transform', function (d) {
-             return 'translate(' + LANE_WIDTH * d.index * 1.5 + ', 0)';
-           });
-           lane.select('.forward').style('visibility', function (d) {
-             return d.direction === 'forward' ? 'visible' : 'hidden';
+             if (editable() && annotation) {
+               d.action();
+             }
+
+             if (editable() && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
+               // there are no tooltips for touch interactions so flash feedback instead
+               var text = annotation ? _t.html(d.id + '.tooltip', {
+                 action: annotation
+               }) : _t.html(d.id + '.nothing');
+               context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass(annotation ? '' : 'disabled').label(text)();
+             }
+
+             lastPointerUpType = null;
+           }).call(tooltipBehavior);
+           buttons.each(function (d) {
+             select(this).call(svgIcon('#' + d.icon));
            });
-           lane.select('.bothways').style('visibility', function (d) {
-             return d.direction === 'bothways' ? 'visible' : 'hidden';
+           context.keybinding().on(commands[0].cmd, function (d3_event) {
+             d3_event.preventDefault();
+             if (editable()) commands[0].action();
+           }).on(commands[1].cmd, function (d3_event) {
+             d3_event.preventDefault();
+             if (editable()) commands[1].action();
            });
-           lane.select('.backward').style('visibility', function (d) {
-             return d.direction === 'backward' ? 'visible' : 'hidden';
+
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
            });
-         }
 
-         lanes.entityIDs = function (val) {
-           _entityIDs = val;
-         };
+           context.map().on('move.undo_redo', debouncedUpdate).on('drawn.undo_redo', debouncedUpdate);
+           context.history().on('change.undo_redo', function (difference) {
+             if (difference) update();
+           });
+           context.on('enter.undo_redo', update);
 
-         lanes.tags = function () {};
+           function update() {
+             buttons.classed('disabled', function (d) {
+               return !editable() || !d.annotation();
+             }).each(function () {
+               var selection = select(this);
 
-         lanes.focus = function () {};
+               if (!selection.select('.tooltip.in').empty()) {
+                 selection.call(tooltipBehavior.updateContent);
+               }
+             });
+           }
+         };
 
-         lanes.off = function () {};
+         tool.uninstall = function () {
+           context.keybinding().off(commands[0].cmd).off(commands[1].cmd);
+           context.map().on('move.undo_redo', null).on('drawn.undo_redo', null);
+           context.history().on('change.undo_redo', null);
+           context.on('enter.undo_redo', null);
+         };
 
-         return utilRebind(lanes, dispatch$1, 'on');
+         return tool;
        }
-       uiFieldLanes.supportsMultiselection = false;
-
-       var _languagesArray = [];
-       function uiFieldLocalized(field, context) {
-         var dispatch$1 = dispatch('change', 'input');
-         var wikipedia = services.wikipedia;
-         var input = select(null);
-         var localizedInputs = select(null);
 
-         var _countryCode;
+       function uiTopToolbar(context) {
+         var sidebarToggle = uiToolSidebarToggle(context),
+             modes = uiToolOldDrawModes(context),
+             notes = uiToolNotes(context),
+             undoRedo = uiToolUndoRedo(context),
+             save = uiToolSave(context);
 
-         var _tags; // A concern here in switching to async data means that _languagesArray will not
-         // be available the first time through, so things like the fetchers and
-         // the language() function will not work immediately.
+         function notesEnabled() {
+           var noteLayer = context.layers().layer('notes');
+           return noteLayer && noteLayer.enabled();
+         }
 
+         function topToolbar(bar) {
+           bar.on('wheel.topToolbar', function (d3_event) {
+             if (!d3_event.deltaX) {
+               // translate vertical scrolling into horizontal scrolling in case
+               // the user doesn't have an input device that can scroll horizontally
+               bar.node().scrollLeft += d3_event.deltaY;
+             }
+           });
 
-         _mainFileFetcher.get('languages').then(loadLanguagesArray)["catch"](function () {
-           /* ignore */
-         });
-         var _territoryLanguages = {};
-         _mainFileFetcher.get('territory_languages').then(function (d) {
-           _territoryLanguages = d;
-         })["catch"](function () {
-           /* ignore */
-         });
-         var allSuggestions = _mainPresetIndex.collection.filter(function (p) {
-           return p.suggestion === true;
-         }); // reuse these combos
+           var debouncedUpdate = debounce(update, 500, {
+             leading: true,
+             trailing: true
+           });
 
-         var langCombo = uiCombobox(context, 'localized-lang').fetcher(fetchLanguages).minItems(0);
-         var brandCombo = uiCombobox(context, 'localized-brand').canAutocomplete(false).minItems(1);
+           context.layers().on('change.topToolbar', debouncedUpdate);
+           update();
 
-         var _selection = select(null);
+           function update() {
+             var tools = [sidebarToggle, 'spacer', modes];
+             tools.push('spacer');
 
-         var _multilingual = [];
+             if (notesEnabled()) {
+               tools = tools.concat([notes, 'spacer']);
+             }
 
-         var _buttonTip = uiTooltip().title(_t.html('translate.translate')).placement('left');
+             tools = tools.concat([undoRedo, save]);
+             var toolbarItems = bar.selectAll('.toolbar-item').data(tools, function (d) {
+               return d.id || d;
+             });
+             toolbarItems.exit().each(function (d) {
+               if (d.uninstall) {
+                 d.uninstall();
+               }
+             }).remove();
+             var itemsEnter = toolbarItems.enter().append('div').attr('class', function (d) {
+               var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
+               if (d.klass) classes += ' ' + d.klass;
+               return classes;
+             });
+             var actionableItems = itemsEnter.filter(function (d) {
+               return d !== 'spacer';
+             });
+             actionableItems.append('div').attr('class', 'item-content').each(function (d) {
+               select(this).call(d.render, bar);
+             });
+             actionableItems.append('div').attr('class', 'item-label').html(function (d) {
+               return d.label;
+             });
+           }
+         }
 
-         var _wikiTitles;
+         return topToolbar;
+       }
 
-         var _entityIDs = [];
+       function uiZoomToSelection(context) {
+         function isDisabled() {
+           var mode = context.mode();
+           return !mode || !mode.zoomToSelected;
+         }
 
-         function loadLanguagesArray(dataLanguages) {
-           if (_languagesArray.length !== 0) return; // some conversion is needed to ensure correct OSM tags are used
+         var _lastPointerUpType;
 
-           var replacements = {
-             sr: 'sr-Cyrl',
-             // in OSM, `sr` implies Cyrillic
-             'sr-Cyrl': false // `sr-Cyrl` isn't used in OSM
+         function pointerup(d3_event) {
+           _lastPointerUpType = d3_event.pointerType;
+         }
 
-           };
+         function click(d3_event) {
+           d3_event.preventDefault();
 
-           for (var code in dataLanguages) {
-             if (replacements[code] === false) continue;
-             var metaCode = code;
-             if (replacements[code]) metaCode = replacements[code];
+           if (isDisabled()) {
+             if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
+               context.ui().flash.duration(2000).iconName('#iD-icon-framed-dot').iconClass('disabled').label(_t.html('inspector.zoom_to.no_selection'))();
+             }
+           } else {
+             var mode = context.mode();
 
-             _languagesArray.push({
-               localName: _mainLocalizer.languageName(metaCode, {
-                 localOnly: true
-               }),
-               nativeName: dataLanguages[metaCode].nativeName,
-               code: code,
-               label: _mainLocalizer.languageName(metaCode)
-             });
+             if (mode && mode.zoomToSelected) {
+               mode.zoomToSelected();
+             }
            }
+
+           _lastPointerUpType = null;
          }
 
-         function calcLocked() {
-           // only lock the Name field
-           var isLocked = field.id === 'name' && _entityIDs.length && // lock the field if any feature needs it
-           _entityIDs.some(function (entityID) {
-             var entity = context.graph().hasEntity(entityID);
-             if (!entity) return false;
+         return function (selection) {
+           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
+             if (isDisabled()) {
+               return _t.html('inspector.zoom_to.no_selection');
+             }
 
-             var original = context.graph().base().entities[_entityIDs[0]];
+             return _t.html('inspector.zoom_to.title');
+           }).keys([_t('inspector.zoom_to.key')]);
+           var button = selection.append('button').on('pointerup', pointerup).on('click', click).call(svgIcon('#iD-icon-framed-dot', 'light')).call(tooltipBehavior);
 
-             var hasOriginalName = original && entity.tags.name && entity.tags.name === original.tags.name; // if the name was already edited manually then allow further editing
+           function setEnabledState() {
+             button.classed('disabled', isDisabled());
 
-             if (!hasOriginalName) return false; // features linked to Wikidata are likely important and should be protected
+             if (!button.select('.tooltip.in').empty()) {
+               button.call(tooltipBehavior.updateContent);
+             }
+           }
 
-             if (entity.tags.wikidata) return true; // assume the name has already been confirmed if its source has been researched
+           context.on('enter.uiZoomToSelection', setEnabledState);
+           setEnabledState();
+         };
+       }
 
-             if (entity.tags['name:etymology:wikidata']) return true;
-             var preset = _mainPresetIndex.match(entity, context.graph());
-             var isSuggestion = preset && preset.suggestion;
-             var showsBrand = preset && preset.originalFields.filter(function (d) {
-               return d.id === 'brand';
-             }).length; // protect standardized brand names
+       function uiPane(id, context) {
+         var _key;
 
-             return isSuggestion && !showsBrand;
-           });
+         var _label = '';
+         var _description = '';
+         var _iconName = '';
 
-           field.locked(isLocked);
-         } // update _multilingual, maintaining the existing order
+         var _sections; // array of uiSection objects
 
 
-         function calcMultilingual(tags) {
-           var existingLangsOrdered = _multilingual.map(function (item) {
-             return item.lang;
-           });
+         var _paneSelection = select(null);
 
-           var existingLangs = new Set(existingLangsOrdered.filter(Boolean));
+         var _paneTooltip;
 
-           for (var k in tags) {
-             var m = k.match(/^(.*):([a-zA-Z_-]+)$/);
+         var pane = {
+           id: id
+         };
 
-             if (m && m[1] === field.key && m[2]) {
-               var item = {
-                 lang: m[2],
-                 value: tags[k]
-               };
+         pane.label = function (val) {
+           if (!arguments.length) return _label;
+           _label = val;
+           return pane;
+         };
 
-               if (existingLangs.has(item.lang)) {
-                 // update the value
-                 _multilingual[existingLangsOrdered.indexOf(item.lang)].value = item.value;
-                 existingLangs["delete"](item.lang);
-               } else {
-                 _multilingual.push(item);
-               }
-             }
-           }
+         pane.key = function (val) {
+           if (!arguments.length) return _key;
+           _key = val;
+           return pane;
+         };
 
-           _multilingual = _multilingual.filter(function (item) {
-             return !item.lang || !existingLangs.has(item.lang);
-           });
-         }
+         pane.description = function (val) {
+           if (!arguments.length) return _description;
+           _description = val;
+           return pane;
+         };
 
-         function localized(selection) {
-           _selection = selection;
-           calcLocked();
-           var isLocked = field.locked();
-           var singularEntity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-           var preset = singularEntity && _mainPresetIndex.match(singularEntity, context.graph());
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]); // enter/update
+         pane.iconName = function (val) {
+           if (!arguments.length) return _iconName;
+           _iconName = val;
+           return pane;
+         };
 
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           input = wrap.selectAll('.localized-main').data([0]); // enter/update
+         pane.sections = function (val) {
+           if (!arguments.length) return _sections;
+           _sections = val;
+           return pane;
+         };
 
-           input = input.enter().append('input').attr('type', 'text').attr('id', field.domId).attr('class', 'localized-main').call(utilNoAuto).merge(input);
+         pane.selection = function () {
+           return _paneSelection;
+         };
+
+         function hidePane() {
+           context.ui().togglePanes();
+         }
 
-           if (preset && field.id === 'name') {
-             var pTag = preset.id.split('/', 2);
-             var pKey = pTag[0];
-             var pValue = pTag[1];
+         pane.togglePane = function (d3_event) {
+           if (d3_event) d3_event.preventDefault();
 
-             if (!preset.suggestion) {
-               // Not a suggestion preset - Add a suggestions dropdown if it makes sense to.
-               // This code attempts to determine if the matched preset is the
-               // kind of preset that even can benefit from name suggestions..
-               // - true = shops, cafes, hotels, etc. (also generic and fallback presets)
-               // - false = churches, parks, hospitals, etc. (things not in the index)
-               var isFallback = preset.isFallback();
-               var goodSuggestions = allSuggestions.filter(function (s) {
-                 if (isFallback) return true;
-                 var sTag = s.id.split('/', 2);
-                 var sKey = sTag[0];
-                 var sValue = sTag[1];
-                 return pKey === sKey && (!pValue || pValue === sValue);
-               }); // Show the suggestions.. If the user picks one, change the tags..
+           _paneTooltip.hide();
 
-               if (allSuggestions.length && goodSuggestions.length) {
-                 input.on('blur.localized', checkBrandOnBlur).call(brandCombo.fetcher(fetchBrandNames(preset, allSuggestions)).on('accept', acceptBrand).on('cancel', cancelBrand));
-               }
-             }
+           context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
+         };
+
+         pane.renderToggleButton = function (selection) {
+           if (!_paneTooltip) {
+             _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
            }
 
-           input.classed('disabled', !!isLocked).attr('readonly', isLocked || null).on('input', change(true)).on('blur', change()).on('change', change());
-           var translateButton = wrap.selectAll('.localized-add').data([0]);
-           translateButton = translateButton.enter().append('button').attr('class', 'localized-add form-field-button').call(svgIcon('#iD-icon-plus')).merge(translateButton);
-           translateButton.classed('disabled', !!isLocked).call(isLocked ? _buttonTip.destroy : _buttonTip).on('click', addNew);
+           selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
+         };
 
-           if (_tags && !_multilingual.length) {
-             calcMultilingual(_tags);
+         pane.renderContent = function (selection) {
+           // override to fully customize content
+           if (_sections) {
+             _sections.forEach(function (section) {
+               selection.call(section.render);
+             });
            }
+         };
 
-           localizedInputs = selection.selectAll('.localized-multilingual').data([0]);
-           localizedInputs = localizedInputs.enter().append('div').attr('class', 'localized-multilingual').merge(localizedInputs);
-           localizedInputs.call(renderMultilingual);
-           localizedInputs.selectAll('button, input').classed('disabled', !!isLocked).attr('readonly', isLocked || null); // We are not guaranteed to get an `accept` or `cancel` when blurring the field.
-           // (This can happen if the user actives the combo, arrows down, and then clicks off to blur)
-           // So compare the current field value against the suggestions one last time.
+         pane.renderPane = function (selection) {
+           _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
 
-           function checkBrandOnBlur() {
-             var latest = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
-             if (!latest) return; // deleting the entity blurred the field?
+           var heading = _paneSelection.append('div').attr('class', 'pane-heading');
 
-             var preset = _mainPresetIndex.match(latest, context.graph());
-             if (preset && preset.suggestion) return; // already accepted
+           heading.append('h2').html(_label);
+           heading.append('button').attr('title', _t('icons.close')).on('click', hidePane).call(svgIcon('#iD-icon-close'));
 
-             var name = utilGetSetValue(input).trim();
-             var matched = allSuggestions.filter(function (s) {
-               return name === s.name();
-             });
+           _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
 
-             if (matched.length === 1) {
-               acceptBrand({
-                 suggestion: matched[0]
-               });
-             } else {
-               cancelBrand();
-             }
+           if (_key) {
+             context.keybinding().on(_key, pane.togglePane);
            }
+         };
 
-           function acceptBrand(d) {
-             var entity = _entityIDs.length === 1 && context.hasEntity(_entityIDs[0]);
+         return pane;
+       }
 
-             if (!d || !entity) {
-               cancelBrand();
-               return;
-             }
+       function uiSectionBackgroundDisplayOptions(context) {
+         var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
 
-             var tags = entity.tags;
-             var geometry = entity.geometry(context.graph());
-             var removed = preset.unsetTags(tags, geometry);
+         var _detected = utilDetect();
 
-             for (var k in tags) {
-               tags[k] = removed[k]; // set removed tags to `undefined`
-             }
+         var _storedOpacity = corePreferences('background-opacity');
 
-             tags = d.suggestion.setTags(tags, geometry);
-             utilGetSetValue(input, tags.name);
-             dispatch$1.call('change', this, tags);
-           } // user hit escape
+         var _minVal = 0;
 
+         var _maxVal = _detected.cssfilters ? 3 : 1;
 
-           function cancelBrand() {
-             var name = utilGetSetValue(input);
-             dispatch$1.call('change', this, {
-               name: name
-             });
-           }
+         var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
 
-           function fetchBrandNames(preset, suggestions) {
-             var pTag = preset.id.split('/', 2);
-             var pKey = pTag[0];
-             var pValue = pTag[1];
-             return function (value, callback) {
-               var results = [];
-
-               if (value && value.length > 2) {
-                 for (var i = 0; i < suggestions.length; i++) {
-                   var s = suggestions[i]; // don't suggest brands from incompatible countries
-
-                   if (_countryCode && s.countryCodes && s.countryCodes.indexOf(_countryCode) === -1) continue;
-                   var sTag = s.id.split('/', 2);
-                   var sKey = sTag[0];
-                   var sValue = sTag[1];
-                   var subtitle = s.subtitle();
-                   var name = s.name();
-                   if (subtitle) name += ' – ' + subtitle;
-                   var dist = utilEditDistance(value, name.substring(0, value.length));
-                   var matchesPreset = pKey === sKey && (!pValue || pValue === sValue);
-
-                   if (dist < 1 || matchesPreset && dist < 3) {
-                     var obj = {
-                       value: s.name(),
-                       title: name,
-                       display: s.nameLabel() + (subtitle ? ' – ' + s.subtitleLabel() : ''),
-                       suggestion: s,
-                       dist: dist + (matchesPreset ? 0 : 1) // penalize if not matched preset
+         var _options = {
+           brightness: _storedOpacity !== null ? +_storedOpacity : 1,
+           contrast: 1,
+           saturation: 1,
+           sharpness: 1
+         };
 
-                     };
-                     results.push(obj);
-                   }
-                 }
+         function clamp(x, min, max) {
+           return Math.max(min, Math.min(x, max));
+         }
 
-                 results.sort(function (a, b) {
-                   return a.dist - b.dist;
-                 });
-               }
+         function updateValue(d, val) {
+           val = clamp(val, _minVal, _maxVal);
+           _options[d] = val;
+           context.background()[d](val);
 
-               results = results.slice(0, 10);
-               callback(results);
-             };
+           if (d === 'brightness') {
+             corePreferences('background-opacity', val);
            }
 
-           function addNew(d3_event) {
-             d3_event.preventDefault();
-             if (field.locked()) return;
-             var defaultLang = _mainLocalizer.languageCode().toLowerCase();
+           section.reRender();
+         }
 
-             var langExists = _multilingual.find(function (datum) {
-               return datum.lang === defaultLang;
-             });
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.display-options-container').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'display-options-container controls-list'); // add slider controls
 
-             var isLangEn = defaultLang.indexOf('en') > -1;
+           var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('label').attr('class', function (d) {
+             return 'display-control display-control-' + d;
+           });
+           slidersEnter.html(function (d) {
+             return _t.html('background.' + d);
+           }).append('span').attr('class', function (d) {
+             return 'display-option-value display-option-value-' + d;
+           });
+           var sildersControlEnter = slidersEnter.append('div').attr('class', 'control-wrap');
+           sildersControlEnter.append('input').attr('class', function (d) {
+             return 'display-option-input display-option-input-' + d;
+           }).attr('type', 'range').attr('min', _minVal).attr('max', _maxVal).attr('step', '0.05').on('input', function (d3_event, d) {
+             var val = select(this).property('value');
 
-             if (isLangEn || langExists) {
-               defaultLang = '';
-               langExists = _multilingual.find(function (datum) {
-                 return datum.lang === defaultLang;
-               });
+             if (!val && d3_event && d3_event.target) {
+               val = d3_event.target.value;
              }
 
-             if (!langExists) {
-               // prepend the value so it appears at the top
-               _multilingual.unshift({
-                 lang: defaultLang,
-                 value: ''
-               });
+             updateValue(d, val);
+           });
+           sildersControlEnter.append('button').attr('title', function (d) {
+             return "".concat(_t('background.reset'), " ").concat(_t('background.' + d));
+           }).attr('class', function (d) {
+             return 'display-option-reset display-option-reset-' + d;
+           }).on('click', function (d3_event, d) {
+             if (d3_event.button !== 0) return;
+             updateValue(d, 1);
+           }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo'))); // reset all button
 
-               localizedInputs.call(renderMultilingual);
-             }
-           }
+           containerEnter.append('a').attr('class', 'display-option-resetlink').attr('role', 'button').attr('href', '#').call(_t.append('background.reset_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
 
-           function change(onInput) {
-             return function (d3_event) {
-               if (field.locked()) {
-                 d3_event.preventDefault();
-                 return;
-               }
+             for (var i = 0; i < _sliders.length; i++) {
+               updateValue(_sliders[i], 1);
+             }
+           }); // update
 
-               var val = utilGetSetValue(select(this));
-               if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
+           container = containerEnter.merge(container);
+           container.selectAll('.display-option-input').property('value', function (d) {
+             return _options[d];
+           });
+           container.selectAll('.display-option-value').text(function (d) {
+             return Math.floor(_options[d] * 100) + '%';
+           });
+           container.selectAll('.display-option-reset').classed('disabled', function (d) {
+             return _options[d] === 1;
+           }); // first time only, set brightness if needed
 
-               if (!val && Array.isArray(_tags[field.key])) return;
-               var t = {};
-               t[field.key] = val || undefined;
-               dispatch$1.call('change', this, t, onInput);
-             };
+           if (containerEnter.size() && _options.brightness !== 1) {
+             context.background().brightness(_options.brightness);
            }
          }
 
-         function key(lang) {
-           return field.key + ':' + lang;
-         }
+         return section;
+       }
 
-         function changeLang(d3_event, d) {
-           var tags = {}; // make sure unrecognized suffixes are lowercase - #7156
+       function uiSettingsCustomBackground() {
+         var dispatch = dispatch$8('change');
 
-           var lang = utilGetSetValue(select(this)).toLowerCase();
+         function render(selection) {
+           // keep separate copies of original and current settings
+           var _origSettings = {
+             template: corePreferences('background-custom-template')
+           };
+           var _currSettings = {
+             template: corePreferences('background-custom-template')
+           };
+           var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+           var modal = uiConfirm(selection).okButton();
+           modal.classed('settings-modal settings-custom-background', true);
+           modal.select('.modal-section.header').append('h3').call(_t.append('settings.custom_background.header'));
+           var textSection = modal.select('.modal-section.message-text');
+           var instructions = "".concat(_t.html('settings.custom_background.instructions.info'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.wms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.proj'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.wkid'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.dimensions'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.bbox'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.tms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.xyz'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.flipped_y'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.switch'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.quadtile'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.scale_factor'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.example'), "\n") + "`".concat(example, "`");
+           textSection.append('div').attr('class', 'instructions-template').html(marked_1(instructions));
+           textSection.append('textarea').attr('class', 'field-template').attr('placeholder', _t('settings.custom_background.template.placeholder')).call(utilNoAuto).property('value', _currSettings.template); // insert a cancel button
 
-           var language = _languagesArray.find(function (d) {
-             return d.label.toLowerCase() === lang || d.localName && d.localName.toLowerCase() === lang || d.nativeName && d.nativeName.toLowerCase() === lang;
-           });
+           var buttonSection = modal.select('.modal-section.buttons');
+           buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').call(_t.append('confirm.cancel'));
+           buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+           buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
 
-           if (language) lang = language.code;
+           function isSaveDisabled() {
+             return null;
+           } // restore the original template
 
-           if (d.lang && d.lang !== lang) {
-             tags[key(d.lang)] = undefined;
-           }
 
-           var newKey = lang && context.cleanTagKey(key(lang));
-           var value = utilGetSetValue(select(this.parentNode).selectAll('.localized-value'));
+           function clickCancel() {
+             textSection.select('.field-template').property('value', _origSettings.template);
+             corePreferences('background-custom-template', _origSettings.template);
+             this.blur();
+             modal.close();
+           } // accept the current template
 
-           if (newKey && value) {
-             tags[newKey] = value;
-           } else if (newKey && _wikiTitles && _wikiTitles[d.lang]) {
-             tags[newKey] = _wikiTitles[d.lang];
-           }
 
-           d.lang = lang;
-           dispatch$1.call('change', this, tags);
+           function clickSave() {
+             _currSettings.template = textSection.select('.field-template').property('value');
+             corePreferences('background-custom-template', _currSettings.template);
+             this.blur();
+             modal.close();
+             dispatch.call('change', this, _currSettings);
+           }
          }
 
-         function changeValue(d3_event, d) {
-           if (!d.lang) return;
-           var value = context.cleanTagValue(utilGetSetValue(select(this))) || undefined; // don't override multiple values with blank string
+         return utilRebind(render, dispatch, 'on');
+       }
 
-           if (!value && Array.isArray(d.value)) return;
-           var t = {};
-           t[key(d.lang)] = value;
-           d.value = value;
-           dispatch$1.call('change', this, t);
-         }
+       function uiSectionBackgroundList(context) {
+         var _backgroundList = select(null);
 
-         function fetchLanguages(value, cb) {
-           var v = value.toLowerCase(); // show the user's language first
+         var _customSource = context.background().findSource('custom');
 
-           var langCodes = [_mainLocalizer.localeCode(), _mainLocalizer.languageCode()];
+         var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);
 
-           if (_countryCode && _territoryLanguages[_countryCode]) {
-             langCodes = langCodes.concat(_territoryLanguages[_countryCode]);
-           }
+         var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);
 
-           var langItems = [];
-           langCodes.forEach(function (code) {
-             var langItem = _languagesArray.find(function (item) {
-               return item.code === code;
-             });
+         function previousBackgroundID() {
+           return corePreferences('background-last-used-toggle');
+         }
 
-             if (langItem) langItems.push(langItem);
+         function renderDisclosureContent(selection) {
+           // the background list
+           var container = selection.selectAll('.layer-background-list').data([0]);
+           _backgroundList = container.enter().append('ul').attr('class', 'layer-list layer-background-list').attr('dir', 'auto').merge(container); // add minimap toggle below list
+
+           var bgExtrasListEnter = selection.selectAll('.bg-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list bg-extras-list');
+           var minimapLabelEnter = bgExtrasListEnter.append('li').attr('class', 'minimap-toggle-item').append('label').call(uiTooltip().title(_t.html('background.minimap.tooltip')).keys([_t('background.minimap.key')]).placement('top'));
+           minimapLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             uiMapInMap.toggle();
+           });
+           minimapLabelEnter.append('span').call(_t.append('background.minimap.description'));
+           var panelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'background-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))]).placement('top'));
+           panelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             context.ui().info.toggle('background');
+           });
+           panelLabelEnter.append('span').call(_t.append('background.panel.description'));
+           var locPanelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'location-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.location_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))]).placement('top'));
+           locPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             context.ui().info.toggle('location');
            });
-           langItems = utilArrayUniq(langItems.concat(_languagesArray));
-           cb(langItems.filter(function (d) {
-             return d.label.toLowerCase().indexOf(v) >= 0 || d.localName && d.localName.toLowerCase().indexOf(v) >= 0 || d.nativeName && d.nativeName.toLowerCase().indexOf(v) >= 0 || d.code.toLowerCase().indexOf(v) >= 0;
-           }).map(function (d) {
-             return {
-               value: d.label
-             };
-           }));
-         }
+           locPanelLabelEnter.append('span').call(_t.append('background.location_panel.description')); // "Info / Report a Problem" link
 
-         function renderMultilingual(selection) {
-           var entries = selection.selectAll('div.entry').data(_multilingual, function (d) {
-             return d.lang;
+           selection.selectAll('.imagery-faq').data([0]).enter().append('div').attr('class', 'imagery-faq').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery').append('span').call(_t.append('background.imagery_problem_faq'));
+
+           _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
+             chooseBackground(d);
+           }, function (d) {
+             return !d.isHidden() && !d.overlay;
            });
-           entries.exit().style('top', '0').style('max-height', '240px').transition().duration(200).style('opacity', '0').style('max-height', '0px').remove();
-           var entriesEnter = entries.enter().append('div').attr('class', 'entry').each(function (_, index) {
-             var wrap = select(this);
-             var domId = utilUniqueDomId(index);
-             var label = wrap.append('label').attr('class', 'field-label').attr('for', domId);
-             var text = label.append('span').attr('class', 'label-text');
-             text.append('span').attr('class', 'label-textvalue').html(_t.html('translate.localized_translation_label'));
-             text.append('span').attr('class', 'label-textannotation');
-             label.append('button').attr('class', 'remove-icon-multilingual').on('click', function (d3_event, d) {
-               if (field.locked()) return;
-               d3_event.preventDefault();
+         }
 
-               if (!d.lang || !d.value) {
-                 _multilingual.splice(index, 1);
+         function setTooltips(selection) {
+           selection.each(function (d, i, nodes) {
+             var item = select(this).select('label');
+             var span = item.select('span');
+             var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+             var description = d.description();
+             var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+             item.call(uiTooltip().destroyAny);
 
-                 renderMultilingual(selection);
-               } else {
-                 // remove from entity tags
-                 var t = {};
-                 t[key(d.lang)] = undefined;
-                 dispatch$1.call('change', this, t);
-               }
-             }).call(svgIcon('#iD-operation-delete'));
-             wrap.append('input').attr('class', 'localized-lang').attr('id', domId).attr('type', 'text').attr('placeholder', _t('translate.localized_translation_language')).on('blur', changeLang).on('change', changeLang).call(langCombo);
-             wrap.append('input').attr('type', 'text').attr('class', 'localized-value').on('blur', changeValue).on('change', changeValue);
+             if (d.id === previousBackgroundID()) {
+               item.call(uiTooltip().placement(placement).title('<div>' + _t.html('background.switch') + '</div>').keys([uiCmd('⌘' + _t('background.key'))]));
+             } else if (description || isOverflowing) {
+               item.call(uiTooltip().placement(placement).title(description || d.label()));
+             }
            });
-           entriesEnter.style('margin-top', '0px').style('max-height', '0px').style('opacity', '0').transition().duration(200).style('margin-top', '10px').style('max-height', '240px').style('opacity', '1').on('end', function () {
-             select(this).style('max-height', '').style('overflow', 'visible');
+         }
+
+         function drawListItems(layerList, type, change, filter) {
+           var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter).sort(function (a, b) {
+             return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
            });
-           entries = entries.merge(entriesEnter);
-           entries.order();
-           entries.classed('present', function (d) {
-             return d.lang && d.value;
+           var layerLinks = layerList.selectAll('li') // We have to be a bit inefficient about reordering the list since
+           // arrow key navigation of radio values likes to work in the order
+           // they were added, not the display document order.
+           .data(sources, function (d, i) {
+             return d.id + '---' + i;
            });
-           utilGetSetValue(entries.select('.localized-lang'), function (d) {
-             return _mainLocalizer.languageName(d.lang);
+           layerLinks.exit().remove();
+           var enter = layerLinks.enter().append('li').classed('layer-custom', function (d) {
+             return d.id === 'custom';
+           }).classed('best', function (d) {
+             return d.best();
            });
-           utilGetSetValue(entries.select('.localized-value'), function (d) {
-             return typeof d.value === 'string' ? d.value : '';
-           }).attr('title', function (d) {
-             return Array.isArray(d.value) ? d.value.filter(Boolean).join('\n') : null;
-           }).attr('placeholder', function (d) {
-             return Array.isArray(d.value) ? _t('inspector.multiple_values') : _t('translate.localized_translation_name');
-           }).classed('mixed', function (d) {
-             return Array.isArray(d.value);
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', 'background-layer').attr('value', function (d) {
+             return d.id;
+           }).on('change', change);
+           label.append('span').html(function (d) {
+             return d.label();
            });
+           enter.filter(function (d) {
+             return d.id === 'custom';
+           }).append('button').attr('class', 'layer-browse').call(uiTooltip().title(_t.html('settings.custom_background.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             editCustom();
+           }).call(svgIcon('#iD-icon-more'));
+           enter.filter(function (d) {
+             return d.best();
+           }).append('div').attr('class', 'best').call(uiTooltip().title(_t.html('background.best_imagery')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).append('span').html('&#9733;');
+           layerList.call(updateLayerSelections);
          }
 
-         localized.tags = function (tags) {
-           _tags = tags; // Fetch translations from wikipedia
+         function updateLayerSelections(selection) {
+           function active(d) {
+             return context.background().showsLayer(d);
+           }
 
-           if (typeof tags.wikipedia === 'string' && !_wikiTitles) {
-             _wikiTitles = {};
-             var wm = tags.wikipedia.match(/([^:]+):(.+)/);
+           selection.selectAll('li').classed('active', active).classed('switch', function (d) {
+             return d.id === previousBackgroundID();
+           }).call(setTooltips).selectAll('input').property('checked', active);
+         }
 
-             if (wm && wm[0] && wm[1]) {
-               wikipedia.translations(wm[1], wm[2], function (err, d) {
-                 if (err || !d) return;
-                 _wikiTitles = d;
-               });
-             }
+         function chooseBackground(d) {
+           if (d.id === 'custom' && !d.template()) {
+             return editCustom();
            }
 
-           var isMixed = Array.isArray(tags[field.key]);
-           utilGetSetValue(input, typeof tags[field.key] === 'string' ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
-           calcMultilingual(tags);
-
-           _selection.call(localized);
-         };
+           var previousBackground = context.background().baseLayerSource();
+           corePreferences('background-last-used-toggle', previousBackground.id);
+           corePreferences('background-last-used', d.id);
+           context.background().baseLayerSource(d);
+         }
 
-         localized.focus = function () {
-           input.node().focus();
-         };
+         function customChanged(d) {
+           if (d && d.template) {
+             _customSource.template(d.template);
 
-         localized.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           _multilingual = [];
-           loadCountryCode();
-           return localized;
-         };
+             chooseBackground(_customSource);
+           } else {
+             _customSource.template('');
 
-         function loadCountryCode() {
-           var extent = combinedEntityExtent();
-           var countryCode = extent && iso1A2Code(extent.center());
-           _countryCode = countryCode && countryCode.toLowerCase();
+             chooseBackground(context.background().findSource('none'));
+           }
          }
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+         function editCustom() {
+           context.container().call(_settingsCustomBackground);
          }
 
-         return utilRebind(localized, dispatch$1, 'on');
+         context.background().on('change.background_list', function () {
+           _backgroundList.call(updateLayerSelections);
+         });
+         context.map().on('move.background_list', debounce(function () {
+           // layers in-view may have changed due to map move
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
        }
 
-       function uiFieldMaxspeed(field, context) {
-         var dispatch$1 = dispatch('change');
-         var unitInput = select(null);
-         var input = select(null);
-         var _entityIDs = [];
-
-         var _tags;
+       function uiSectionBackgroundOffset(context) {
+         var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-         var _isImperial;
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-         var speedCombo = uiCombobox(context, 'maxspeed');
-         var unitCombo = uiCombobox(context, 'maxspeed-unit').data(['km/h', 'mph'].map(comboValues));
-         var metricValues = [20, 30, 40, 50, 60, 70, 80, 90, 100, 110, 120];
-         var imperialValues = [5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80];
+         var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
 
-         function maxspeed(selection) {
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           input = wrap.selectAll('input.maxspeed-number').data([0]);
-           input = input.enter().append('input').attr('type', 'text').attr('class', 'maxspeed-number').attr('id', field.domId).call(utilNoAuto).call(speedCombo).merge(input);
-           input.on('change', change).on('blur', change);
-           var loc = combinedEntityExtent().center();
-           _isImperial = roadSpeedUnit(loc) === 'mph';
-           unitInput = wrap.selectAll('input.maxspeed-unit').data([0]);
-           unitInput = unitInput.enter().append('input').attr('type', 'text').attr('class', 'maxspeed-unit').call(unitCombo).merge(unitInput);
-           unitInput.on('blur', changeUnits).on('change', changeUnits);
+         function updateValue() {
+           var meters = geoOffsetToMeters(context.background().offset());
+           var x = +meters[0].toFixed(2);
+           var y = +meters[1].toFixed(2);
+           context.container().selectAll('.nudge-inner-rect').select('input').classed('error', false).property('value', x + ', ' + y);
+           context.container().selectAll('.nudge-reset').classed('disabled', function () {
+             return x === 0 && y === 0;
+           });
+         }
 
-           function changeUnits() {
-             _isImperial = utilGetSetValue(unitInput) === 'mph';
-             utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
-             setUnitSuggestions();
-             change();
-           }
+         function resetOffset() {
+           context.background().offset([0, 0]);
+           updateValue();
          }
 
-         function setUnitSuggestions() {
-           speedCombo.data((_isImperial ? imperialValues : metricValues).map(comboValues));
-           utilGetSetValue(unitInput, _isImperial ? 'mph' : 'km/h');
+         function nudge(d) {
+           context.background().nudge(d, context.map().zoom());
+           updateValue();
          }
 
-         function comboValues(d) {
-           return {
-             value: d.toString(),
-             title: d.toString()
-           };
+         function inputOffset() {
+           var input = select(this);
+           var d = input.node().value;
+           if (d === '') return resetOffset();
+           d = d.replace(/;/g, ',').split(',').map(function (n) {
+             // if n is NaN, it will always get mapped to false.
+             return !isNaN(n) && n;
+           });
+
+           if (d.length !== 2 || !d[0] || !d[1]) {
+             input.classed('error', true);
+             return;
+           }
+
+           context.background().offset(geoMetersToOffset(d));
+           updateValue();
          }
 
-         function change() {
-           var tag = {};
-           var value = utilGetSetValue(input).trim(); // don't override multiple values with blank string
+         function dragOffset(d3_event) {
+           if (d3_event.button !== 0) return;
+           var origin = [d3_event.clientX, d3_event.clientY];
+           var pointerId = d3_event.pointerId || 'mouse';
+           context.container().append('div').attr('class', 'nudge-surface');
+           select(window).on(_pointerPrefix + 'move.drag-bg-offset', pointermove).on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
 
-           if (!value && Array.isArray(_tags[field.key])) return;
+           if (_pointerPrefix === 'pointer') {
+             select(window).on('pointercancel.drag-bg-offset', pointerup);
+           }
 
-           if (!value) {
-             tag[field.key] = undefined;
-           } else if (isNaN(value) || !_isImperial) {
-             tag[field.key] = context.cleanTagValue(value);
-           } else {
-             tag[field.key] = context.cleanTagValue(value + ' mph');
+           function pointermove(d3_event) {
+             if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+             var latest = [d3_event.clientX, d3_event.clientY];
+             var d = [-(origin[0] - latest[0]) / 4, -(origin[1] - latest[1]) / 4];
+             origin = latest;
+             nudge(d);
            }
 
-           dispatch$1.call('change', this, tag);
+           function pointerup(d3_event) {
+             if (pointerId !== (d3_event.pointerId || 'mouse')) return;
+             if (d3_event.button !== 0) return;
+             context.container().selectAll('.nudge-surface').remove();
+             select(window).on('.drag-bg-offset', null);
+           }
          }
 
-         maxspeed.tags = function (tags) {
-           _tags = tags;
-           var value = tags[field.key];
-           var isMixed = Array.isArray(value);
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.nudge-container').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'nudge-container');
+           containerEnter.append('div').attr('class', 'nudge-instructions').call(_t.append('background.offset'));
+           var nudgeWrapEnter = containerEnter.append('div').attr('class', 'nudge-controls-wrap');
+           var nudgeEnter = nudgeWrapEnter.append('div').attr('class', 'nudge-outer-rect').on(_pointerPrefix + 'down', dragOffset);
+           nudgeEnter.append('div').attr('class', 'nudge-inner-rect').append('input').attr('type', 'text').attr('aria-label', _t('background.offset_label')).on('change', inputOffset);
+           nudgeWrapEnter.append('div').selectAll('button').data(_directions).enter().append('button').attr('title', function (d) {
+             return _t("background.nudge.".concat(d[0]));
+           }).attr('class', function (d) {
+             return d[0] + ' nudge';
+           }).on('click', function (d3_event, d) {
+             nudge(d[1]);
+           });
+           nudgeWrapEnter.append('button').attr('title', _t('background.reset')).attr('class', 'nudge-reset disabled').on('click', function (d3_event) {
+             d3_event.preventDefault();
+             resetOffset();
+           }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
+           updateValue();
+         }
 
-           if (!isMixed) {
-             if (value && value.indexOf('mph') >= 0) {
-               value = parseInt(value, 10).toString();
-               _isImperial = true;
-             } else if (value) {
-               _isImperial = false;
-             }
-           }
+         context.background().on('change.backgroundOffset-update', updateValue);
+         return section;
+       }
 
-           setUnitSuggestions();
-           utilGetSetValue(input, typeof value === 'string' ? value : '').attr('title', isMixed ? value.filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder()).classed('mixed', isMixed);
-         };
+       function uiSectionOverlayList(context) {
+         var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
 
-         maxspeed.focus = function () {
-           input.node().focus();
-         };
+         var _overlayList = select(null);
 
-         maxspeed.entityIDs = function (val) {
-           _entityIDs = val;
-         };
+         function setTooltips(selection) {
+           selection.each(function (d, i, nodes) {
+             var item = select(this).select('label');
+             var span = item.select('span');
+             var placement = i < nodes.length / 2 ? 'bottom' : 'top';
+             var description = d.description();
+             var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
+             item.call(uiTooltip().destroyAny);
 
-         function combinedEntityExtent() {
-           return _entityIDs && _entityIDs.length && utilTotalExtent(_entityIDs, context.graph());
+             if (description || isOverflowing) {
+               item.call(uiTooltip().placement(placement).title(description || d.name()));
+             }
+           });
          }
 
-         return utilRebind(maxspeed, dispatch$1, 'on');
-       }
+         function updateLayerSelections(selection) {
+           function active(d) {
+             return context.background().showsLayer(d);
+           }
 
-       function uiFieldRadio(field, context) {
-         var dispatch$1 = dispatch('change');
-         var placeholder = select(null);
-         var wrap = select(null);
-         var labels = select(null);
-         var radios = select(null);
-         var radioData = (field.options || field.strings && field.strings.options && Object.keys(field.strings.options) || field.keys).slice(); // shallow copy
+           selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
+         }
 
-         var typeField;
-         var layerField;
-         var _oldType = {};
-         var _entityIDs = [];
+         function chooseOverlay(d3_event, d) {
+           d3_event.preventDefault();
+           context.background().toggleOverlayLayer(d);
 
-         function selectedKey() {
-           var node = wrap.selectAll('.form-field-input-radio label.active input');
-           return !node.empty() && node.datum();
+           _overlayList.call(updateLayerSelections);
+
+           document.activeElement.blur();
          }
 
-         function radio(selection) {
-           selection.classed('preset-radio', true);
-           wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           var enter = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-radio');
-           enter.append('span').attr('class', 'placeholder');
-           wrap = wrap.merge(enter);
-           placeholder = wrap.selectAll('.placeholder');
-           labels = wrap.selectAll('label').data(radioData);
-           enter = labels.enter().append('label');
-           enter.append('input').attr('type', 'radio').attr('name', field.id).attr('value', function (d) {
-             return field.t('options.' + d, {
-               'default': d
-             });
-           }).attr('checked', false);
-           enter.append('span').html(function (d) {
-             return field.t.html('options.' + d, {
-               'default': d
-             });
+         function drawListItems(layerList, type, change, filter) {
+           var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter);
+           var layerLinks = layerList.selectAll('li').data(sources, function (d) {
+             return d.name();
            });
-           labels = labels.merge(enter);
-           radios = labels.selectAll('input').on('change', changeRadio);
+           layerLinks.exit().remove();
+           var enter = layerLinks.enter().append('li');
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', 'layers').on('change', change);
+           label.append('span').html(function (d) {
+             return d.label();
+           });
+           layerList.selectAll('li').sort(sortSources);
+           layerList.call(updateLayerSelections);
+
+           function sortSources(a, b) {
+             return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
+           }
          }
 
-         function structureExtras(selection, tags) {
-           var selected = selectedKey() || tags.layer !== undefined;
-           var type = _mainPresetIndex.field(selected);
-           var layer = _mainPresetIndex.field('layer');
-           var showLayer = selected === 'bridge' || selected === 'tunnel' || tags.layer !== undefined;
-           var extrasWrap = selection.selectAll('.structure-extras-wrap').data(selected ? [0] : []);
-           extrasWrap.exit().remove();
-           extrasWrap = extrasWrap.enter().append('div').attr('class', 'structure-extras-wrap').merge(extrasWrap);
-           var list = extrasWrap.selectAll('ul').data([0]);
-           list = list.enter().append('ul').attr('class', 'rows').merge(list); // Type
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.layer-overlay-list').data([0]);
+           _overlayList = container.enter().append('ul').attr('class', 'layer-list layer-overlay-list').attr('dir', 'auto').merge(container);
 
-           if (type) {
-             if (!typeField || typeField.id !== selected) {
-               typeField = uiField(context, type, _entityIDs, {
-                 wrap: false
-               }).on('change', changeType);
-             }
+           _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
+             return !d.isHidden() && d.overlay;
+           });
+         }
 
-             typeField.tags(tags);
-           } else {
-             typeField = null;
-           }
+         context.map().on('move.overlay_list', debounce(function () {
+           // layers in-view may have changed due to map move
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
+       }
 
-           var typeItem = list.selectAll('.structure-type-item').data(typeField ? [typeField] : [], function (d) {
-             return d.id;
-           }); // Exit
+       function uiPaneBackground(context) {
+         var backgroundPane = uiPane('background', context).key(_t('background.key')).label(_t.html('background.title')).description(_t.html('background.description')).iconName('iD-icon-layers').sections([uiSectionBackgroundList(context), uiSectionOverlayList(context), uiSectionBackgroundDisplayOptions(context), uiSectionBackgroundOffset(context)]);
+         return backgroundPane;
+       }
 
-           typeItem.exit().remove(); // Enter
+       function uiPaneHelp(context) {
+         var docKeys = [['help', ['welcome', 'open_data_h', 'open_data', 'before_start_h', 'before_start', 'open_source_h', 'open_source', 'open_source_help']], ['overview', ['navigation_h', 'navigation_drag', 'navigation_zoom', 'features_h', 'features', 'nodes_ways']], ['editing', ['select_h', 'select_left_click', 'select_right_click', 'select_space', 'multiselect_h', 'multiselect', 'multiselect_shift_click', 'multiselect_lasso', 'undo_redo_h', 'undo_redo', 'save_h', 'save', 'save_validation', 'upload_h', 'upload', 'backups_h', 'backups', 'keyboard_h', 'keyboard']], ['feature_editor', ['intro', 'definitions', 'type_h', 'type', 'type_picker', 'fields_h', 'fields_all_fields', 'fields_example', 'fields_add_field', 'tags_h', 'tags_all_tags', 'tags_resources']], ['points', ['intro', 'add_point_h', 'add_point', 'add_point_finish', 'move_point_h', 'move_point', 'delete_point_h', 'delete_point', 'delete_point_command']], ['lines', ['intro', 'add_line_h', 'add_line', 'add_line_draw', 'add_line_continue', 'add_line_finish', 'modify_line_h', 'modify_line_dragnode', 'modify_line_addnode', 'connect_line_h', 'connect_line', 'connect_line_display', 'connect_line_drag', 'connect_line_tag', 'disconnect_line_h', 'disconnect_line_command', 'move_line_h', 'move_line_command', 'move_line_connected', 'delete_line_h', 'delete_line', 'delete_line_command']], ['areas', ['intro', 'point_or_area_h', 'point_or_area', 'add_area_h', 'add_area_command', 'add_area_draw', 'add_area_continue', 'add_area_finish', 'square_area_h', 'square_area_command', 'modify_area_h', 'modify_area_dragnode', 'modify_area_addnode', 'delete_area_h', 'delete_area', 'delete_area_command']], ['relations', ['intro', 'edit_relation_h', 'edit_relation', 'edit_relation_add', 'edit_relation_delete', 'maintain_relation_h', 'maintain_relation', 'relation_types_h', 'multipolygon_h', 'multipolygon', 'multipolygon_create', 'multipolygon_merge', 'turn_restriction_h', 'turn_restriction', 'turn_restriction_field', 'turn_restriction_editing', 'route_h', 'route', 'route_add', 'boundary_h', 'boundary', 'boundary_add']], ['operations', ['intro', 'intro_2', 'straighten', 'orthogonalize', 'circularize', 'move', 'rotate', 'reflect', 'continue', 'reverse', 'disconnect', 'split', 'extract', 'merge', 'delete', 'downgrade', 'copy_paste']], ['notes', ['intro', 'add_note_h', 'add_note', 'place_note', 'move_note', 'update_note_h', 'update_note', 'save_note_h', 'save_note']], ['imagery', ['intro', 'sources_h', 'choosing', 'sources', 'offsets_h', 'offset', 'offset_change']], ['streetlevel', ['intro', 'using_h', 'using', 'photos', 'viewer']], ['gps', ['intro', 'survey', 'using_h', 'using', 'tracing', 'upload']], ['qa', ['intro', 'tools_h', 'tools', 'issues_h', 'issues']]];
+         var headings = {
+           'help.help.open_data_h': 3,
+           'help.help.before_start_h': 3,
+           'help.help.open_source_h': 3,
+           'help.overview.navigation_h': 3,
+           'help.overview.features_h': 3,
+           'help.editing.select_h': 3,
+           'help.editing.multiselect_h': 3,
+           'help.editing.undo_redo_h': 3,
+           'help.editing.save_h': 3,
+           'help.editing.upload_h': 3,
+           'help.editing.backups_h': 3,
+           'help.editing.keyboard_h': 3,
+           'help.feature_editor.type_h': 3,
+           'help.feature_editor.fields_h': 3,
+           'help.feature_editor.tags_h': 3,
+           'help.points.add_point_h': 3,
+           'help.points.move_point_h': 3,
+           'help.points.delete_point_h': 3,
+           'help.lines.add_line_h': 3,
+           'help.lines.modify_line_h': 3,
+           'help.lines.connect_line_h': 3,
+           'help.lines.disconnect_line_h': 3,
+           'help.lines.move_line_h': 3,
+           'help.lines.delete_line_h': 3,
+           'help.areas.point_or_area_h': 3,
+           'help.areas.add_area_h': 3,
+           'help.areas.square_area_h': 3,
+           'help.areas.modify_area_h': 3,
+           'help.areas.delete_area_h': 3,
+           'help.relations.edit_relation_h': 3,
+           'help.relations.maintain_relation_h': 3,
+           'help.relations.relation_types_h': 2,
+           'help.relations.multipolygon_h': 3,
+           'help.relations.turn_restriction_h': 3,
+           'help.relations.route_h': 3,
+           'help.relations.boundary_h': 3,
+           'help.notes.add_note_h': 3,
+           'help.notes.update_note_h': 3,
+           'help.notes.save_note_h': 3,
+           'help.imagery.sources_h': 3,
+           'help.imagery.offsets_h': 3,
+           'help.streetlevel.using_h': 3,
+           'help.gps.using_h': 3,
+           'help.qa.tools_h': 3,
+           'help.qa.issues_h': 3
+         }; // For each section, squash all the texts into a single markdown document
 
-           var typeEnter = typeItem.enter().insert('li', ':first-child').attr('class', 'labeled-input structure-type-item');
-           typeEnter.append('span').attr('class', 'label structure-label-type').attr('for', 'preset-input-' + selected).html(_t.html('inspector.radio.structure.type'));
-           typeEnter.append('div').attr('class', 'structure-input-type-wrap'); // Update
+         var docs = docKeys.map(function (key) {
+           var helpkey = 'help.' + key[0];
+           var helpPaneReplacements = {
+             version: context.version
+           };
+           var text = key[1].reduce(function (all, part) {
+             var subkey = helpkey + '.' + part;
+             var depth = headings[subkey]; // is this subkey a heading?
 
-           typeItem = typeItem.merge(typeEnter);
+             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
 
-           if (typeField) {
-             typeItem.selectAll('.structure-input-type-wrap').call(typeField.render);
-           } // Layer
+             return all + hhh + helpHtml(subkey, helpPaneReplacements) + '\n\n';
+           }, '');
+           return {
+             title: _t.html(helpkey + '.title'),
+             content: marked_1(text.trim()) // use keyboard key styling for shortcuts
+             .replace(/<code>/g, '<kbd>').replace(/<\/code>/g, '<\/kbd>')
+           };
+         });
+         var helpPane = uiPane('help', context).key(_t('help.key')).label(_t.html('help.title')).description(_t.html('help.title')).iconName('iD-icon-help');
 
+         helpPane.renderContent = function (content) {
+           function clickHelp(d, i) {
+             var rtl = _mainLocalizer.textDirection() === 'rtl';
+             content.property('scrollTop', 0);
+             helpPane.selection().select('.pane-heading h2').html(d.title);
+             body.html(d.content);
+             body.selectAll('a').attr('target', '_blank');
+             menuItems.classed('selected', function (m) {
+               return m.title === d.title;
+             });
+             nav.html('');
 
-           if (layer && showLayer) {
-             if (!layerField) {
-               layerField = uiField(context, layer, _entityIDs, {
-                 wrap: false
-               }).on('change', changeLayer);
+             if (rtl) {
+               nav.call(drawNext).call(drawPrevious);
+             } else {
+               nav.call(drawPrevious).call(drawNext);
+             }
+
+             function drawNext(selection) {
+               if (i < docs.length - 1) {
+                 var nextLink = selection.append('a').attr('href', '#').attr('class', 'next').on('click', function (d3_event) {
+                   d3_event.preventDefault();
+                   clickHelp(docs[i + 1], i + 1);
+                 });
+                 nextLink.append('span').html(docs[i + 1].title).call(svgIcon(rtl ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
+               }
              }
 
-             layerField.tags(tags);
-             field.keys = utilArrayUnion(field.keys, ['layer']);
-           } else {
-             layerField = null;
-             field.keys = field.keys.filter(function (k) {
-               return k !== 'layer';
-             });
+             function drawPrevious(selection) {
+               if (i > 0) {
+                 var prevLink = selection.append('a').attr('href', '#').attr('class', 'previous').on('click', function (d3_event) {
+                   d3_event.preventDefault();
+                   clickHelp(docs[i - 1], i - 1);
+                 });
+                 prevLink.call(svgIcon(rtl ? '#iD-icon-forward' : '#iD-icon-backward', 'inline')).append('span').html(docs[i - 1].title);
+               }
+             }
            }
 
-           var layerItem = list.selectAll('.structure-layer-item').data(layerField ? [layerField] : []); // Exit
-
-           layerItem.exit().remove(); // Enter
+           function clickWalkthrough(d3_event) {
+             d3_event.preventDefault();
+             if (context.inIntro()) return;
+             context.container().call(uiIntro(context));
+             context.ui().togglePanes();
+           }
 
-           var layerEnter = layerItem.enter().append('li').attr('class', 'labeled-input structure-layer-item');
-           layerEnter.append('span').attr('class', 'label structure-label-layer').attr('for', 'preset-input-layer').html(_t.html('inspector.radio.structure.layer'));
-           layerEnter.append('div').attr('class', 'structure-input-layer-wrap'); // Update
+           function clickShortcuts(d3_event) {
+             d3_event.preventDefault();
+             context.container().call(context.ui().shortcuts, true);
+           }
 
-           layerItem = layerItem.merge(layerEnter);
+           var toc = content.append('ul').attr('class', 'toc');
+           var menuItems = toc.selectAll('li').data(docs).enter().append('li').append('a').attr('role', 'button').attr('href', '#').html(function (d) {
+             return d.title;
+           }).on('click', function (d3_event, d) {
+             d3_event.preventDefault();
+             clickHelp(d, docs.indexOf(d));
+           });
+           var shortcuts = toc.append('li').attr('class', 'shortcuts').call(uiTooltip().title(_t.html('shortcuts.tooltip')).keys(['?']).placement('top')).append('a').attr('href', '#').on('click', clickShortcuts);
+           shortcuts.append('div').call(_t.append('shortcuts.title'));
+           var walkthrough = toc.append('li').attr('class', 'walkthrough').append('a').attr('href', '#').on('click', clickWalkthrough);
+           walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
+           walkthrough.append('div').call(_t.append('splash.walkthrough'));
+           var helpContent = content.append('div').attr('class', 'left-content');
+           var body = helpContent.append('div').attr('class', 'body');
+           var nav = helpContent.append('div').attr('class', 'nav');
+           clickHelp(docs[0], 0);
+         };
 
-           if (layerField) {
-             layerItem.selectAll('.structure-input-layer-wrap').call(layerField.render);
-           }
-         }
+         return helpPane;
+       }
 
-         function changeType(t, onInput) {
-           var key = selectedKey();
-           if (!key) return;
-           var val = t[key];
+       function uiSectionValidationIssues(id, severity, context) {
+         var _issues = [];
+         var section = uiSection(id, context).label(function () {
+           if (!_issues) return '';
+           var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
+           return _t.html('inspector.title_count', {
+             title: {
+               html: _t.html('issues.' + severity + 's.list_title')
+             },
+             count: issueCountText
+           });
+         }).disclosureContent(renderDisclosureContent).shouldDisplay(function () {
+           return _issues && _issues.length;
+         });
 
-           if (val !== 'no') {
-             _oldType[key] = val;
-           }
+         function getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           };
+         } // get and cache the issues to display, unordered
 
-           if (field.type === 'structureRadio') {
-             // remove layer if it should not be set
-             if (val === 'no' || key !== 'bridge' && key !== 'tunnel' || key === 'tunnel' && val === 'building_passage') {
-               t.layer = undefined;
-             } // add layer if it should be set
 
+         function reloadIssues() {
+           _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
+         }
 
-             if (t.layer === undefined) {
-               if (key === 'bridge' && val !== 'no') {
-                 t.layer = '1';
-               }
+         function renderDisclosureContent(selection) {
+           var center = context.map().center();
+           var graph = context.graph(); // sort issues by distance away from the center of the map
 
-               if (key === 'tunnel' && val !== 'no' && val !== 'building_passage') {
-                 t.layer = '-1';
-               }
-             }
-           }
+           var issues = _issues.map(function withDistance(issue) {
+             var extent = issue.extent(graph);
+             var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
+             return Object.assign(issue, {
+               dist: dist
+             });
+           }).sort(function byDistance(a, b) {
+             return a.dist - b.dist;
+           }); // cut off at 1000
 
-           dispatch$1.call('change', this, t, onInput);
-         }
 
-         function changeLayer(t, onInput) {
-           if (t.layer === '0') {
-             t.layer = undefined;
-           }
+           issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
 
-           dispatch$1.call('change', this, t, onInput);
+           selection.call(drawIssuesList, issues);
          }
 
-         function changeRadio() {
-           var t = {};
-           var activeKey;
-
-           if (field.key) {
-             t[field.key] = undefined;
-           }
+         function drawIssuesList(selection, issues) {
+           var list = selection.selectAll('.issues-list').data([0]);
+           list = list.enter().append('ul').attr('class', 'layer-list issues-list ' + severity + 's-list').merge(list);
+           var items = list.selectAll('li').data(issues, function (d) {
+             return d.key;
+           }); // Exit
 
-           radios.each(function (d) {
-             var active = select(this).property('checked');
-             if (active) activeKey = d;
+           items.exit().remove(); // Enter
 
-             if (field.key) {
-               if (active) t[field.key] = d;
-             } else {
-               var val = _oldType[activeKey] || 'yes';
-               t[d] = active ? val : undefined;
-             }
+           var itemsEnter = items.enter().append('li').attr('class', function (d) {
+             return 'issue severity-' + d.severity;
+           });
+           var labelsEnter = itemsEnter.append('button').attr('class', 'issue-label').on('click', function (d3_event, d) {
+             context.validator().focusIssue(d);
+           }).on('mouseover', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, true, context);
+           }).on('mouseout', function (d3_event, d) {
+             utilHighlightEntities(d.entityIds, false, context);
+           });
+           var textEnter = labelsEnter.append('span').attr('class', 'issue-text');
+           textEnter.append('span').attr('class', 'issue-icon').each(function (d) {
+             var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
+             select(this).call(svgIcon(iconName));
            });
+           textEnter.append('span').attr('class', 'issue-message');
+           /*
+           labelsEnter
+               .append('span')
+               .attr('class', 'issue-autofix')
+               .each(function(d) {
+                   if (!d.autoFix) return;
+                    d3_select(this)
+                       .append('button')
+                       .attr('title', t('issues.fix_one.title'))
+                       .datum(d.autoFix)  // set button datum to the autofix
+                       .attr('class', 'autofix action')
+                       .on('click', function(d3_event, d) {
+                           d3_event.preventDefault();
+                           d3_event.stopPropagation();
+                            var issuesEntityIDs = d.issue.entityIds;
+                           utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
+                            context.perform.apply(context, d.autoArgs);
+                           context.validator().validate();
+                       })
+                       .call(svgIcon('#iD-icon-wrench'));
+               });
+           */
+           // Update
 
-           if (field.type === 'structureRadio') {
-             if (activeKey === 'bridge') {
-               t.layer = '1';
-             } else if (activeKey === 'tunnel' && t.tunnel !== 'building_passage') {
-               t.layer = '-1';
-             } else {
-               t.layer = undefined;
-             }
+           items = items.merge(itemsEnter).order();
+           items.selectAll('.issue-message').html(function (d) {
+             return d.message(context);
+           });
+           /*
+           // autofix
+           var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
+            var autoFixAll = selection.selectAll('.autofix-all')
+               .data(canAutoFix.length ? [0] : []);
+            // exit
+           autoFixAll.exit()
+               .remove();
+            // enter
+           var autoFixAllEnter = autoFixAll.enter()
+               .insert('div', '.issues-list')
+               .attr('class', 'autofix-all');
+            var linkEnter = autoFixAllEnter
+               .append('a')
+               .attr('class', 'autofix-all-link')
+               .attr('href', '#');
+            linkEnter
+               .append('span')
+               .attr('class', 'autofix-all-link-text')
+               .call(t.append('issues.fix_all.title'));
+            linkEnter
+               .append('span')
+               .attr('class', 'autofix-all-link-icon')
+               .call(svgIcon('#iD-icon-wrench'));
+            if (severity === 'warning') {
+               renderIgnoredIssuesReset(selection);
            }
-
-           dispatch$1.call('change', this, t);
+            // update
+           autoFixAll = autoFixAll
+               .merge(autoFixAllEnter);
+            autoFixAll.selectAll('.autofix-all-link')
+               .on('click', function() {
+                   context.pauseChangeDispatch();
+                   context.perform(actionNoop());
+                   canAutoFix.forEach(function(issue) {
+                       var args = issue.autoFix.autoArgs.slice();  // copy
+                       if (typeof args[args.length - 1] !== 'function') {
+                           args.pop();
+                       }
+                       args.push(t('issues.fix_all.annotation'));
+                       context.replace.apply(context, args);
+                   });
+                   context.resumeChangeDispatch();
+                   context.validator().validate();
+               });
+           */
          }
 
-         radio.tags = function (tags) {
-           radios.property('checked', function (d) {
-             if (field.key) {
-               return tags[field.key] === d;
-             }
-
-             return !!(typeof tags[d] === 'string' && tags[d].toLowerCase() !== 'no');
+         context.validator().on('validated.uiSectionValidationIssues' + id, function () {
+           window.requestIdleCallback(function () {
+             reloadIssues();
+             section.reRender();
            });
+         });
+         context.map().on('move.uiSectionValidationIssues' + id, debounce(function () {
+           window.requestIdleCallback(function () {
+             if (getOptions().where === 'visible') {
+               // must refetch issues if they are viewport-dependent
+               reloadIssues();
+             } // always reload list to re-sort-by-distance
 
-           function isMixed(d) {
-             if (field.key) {
-               return Array.isArray(tags[field.key]) && tags[field.key].includes(d);
-             }
 
-             return Array.isArray(tags[d]);
-           }
+             section.reRender();
+           });
+         }, 1000));
+         return section;
+       }
 
-           labels.classed('active', function (d) {
-             if (field.key) {
-               return Array.isArray(tags[field.key]) && tags[field.key].includes(d) || tags[field.key] === d;
-             }
+       function uiSectionValidationOptions(context) {
+         var section = uiSection('issues-options', context).content(renderContent);
 
-             return Array.isArray(tags[d]) || !!(tags[d] && tags[d].toLowerCase() !== 'no');
-           }).classed('mixed', isMixed).attr('title', function (d) {
-             return isMixed(d) ? _t('inspector.unshared_value_tooltip') : null;
+         function renderContent(selection) {
+           var container = selection.selectAll('.issues-options-container').data([0]);
+           container = container.enter().append('div').attr('class', 'issues-options-container').merge(container);
+           var data = [{
+             key: 'what',
+             values: ['edited', 'all']
+           }, {
+             key: 'where',
+             values: ['visible', 'all']
+           }];
+           var options = container.selectAll('.issues-option').data(data, function (d) {
+             return d.key;
            });
-           var selection = radios.filter(function () {
-             return this.checked;
+           var optionsEnter = options.enter().append('div').attr('class', function (d) {
+             return 'issues-option issues-option-' + d.key;
+           });
+           optionsEnter.append('div').attr('class', 'issues-option-title').html(function (d) {
+             return _t.html('issues.options.' + d.key + '.title');
+           });
+           var valuesEnter = optionsEnter.selectAll('label').data(function (d) {
+             return d.values.map(function (val) {
+               return {
+                 value: val,
+                 key: d.key
+               };
+             });
+           }).enter().append('label');
+           valuesEnter.append('input').attr('type', 'radio').attr('name', function (d) {
+             return 'issues-option-' + d.key;
+           }).attr('value', function (d) {
+             return d.value;
+           }).property('checked', function (d) {
+             return getOptions()[d.key] === d.value;
+           }).on('change', function (d3_event, d) {
+             updateOptionValue(d3_event, d.key, d.value);
            });
+           valuesEnter.append('span').html(function (d) {
+             return _t.html('issues.options.' + d.key + '.' + d.value);
+           });
+         }
 
-           if (selection.empty()) {
-             placeholder.html(_t.html('inspector.none'));
-           } else {
-             placeholder.html(selection.attr('value'));
-             _oldType[selection.datum()] = tags[selection.datum()];
-           }
+         function getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             // 'all', 'edited'
+             where: corePreferences('validate-where') || 'all' // 'all', 'visible'
 
-           if (field.type === 'structureRadio') {
-             // For waterways without a tunnel tag, set 'culvert' as
-             // the _oldType to default to if the user picks 'tunnel'
-             if (!!tags.waterway && !_oldType.tunnel) {
-               _oldType.tunnel = 'culvert';
-             }
+           };
+         }
 
-             wrap.call(structureExtras, tags);
+         function updateOptionValue(d3_event, d, val) {
+           if (!val && d3_event && d3_event.target) {
+             val = d3_event.target.value;
            }
-         };
-
-         radio.focus = function () {
-           radios.node().focus();
-         };
-
-         radio.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           _oldType = {};
-           return radio;
-         };
 
-         radio.isAllowed = function () {
-           return _entityIDs.length === 1;
-         };
+           corePreferences('validate-' + d, val);
+           context.validator().validate();
+         }
 
-         return utilRebind(radio, dispatch$1, 'on');
+         return section;
        }
 
-       function uiFieldRestrictions(field, context) {
-         var dispatch$1 = dispatch('change');
-         var breathe = behaviorBreathe();
-         corePreferences('turn-restriction-via-way', null); // remove old key
-
-         var storedViaWay = corePreferences('turn-restriction-via-way0'); // use new key #6922
-
-         var storedDistance = corePreferences('turn-restriction-distance');
-
-         var _maxViaWay = storedViaWay !== null ? +storedViaWay : 0;
+       function uiSectionValidationRules(context) {
+         var MINSQUARE = 0;
+         var MAXSQUARE = 20;
+         var DEFAULTSQUARE = 5; // see also unsquare_way.js
 
-         var _maxDistance = storedDistance ? +storedDistance : 30;
+         var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
 
-         var _initialized = false;
+         var _ruleKeys = context.validator().getRuleKeys().filter(function (key) {
+           return key !== 'maprules';
+         }).sort(function (key1, key2) {
+           // alphabetize by localized title
+           return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
+         });
 
-         var _parent = select(null); // the entire field
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.issues-rulelist-container').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'issues-rulelist-container');
+           containerEnter.append('ul').attr('class', 'layer-list issue-rules-list');
+           var ruleLinks = containerEnter.append('div').attr('class', 'issue-rules-links section-footer');
+           ruleLinks.append('a').attr('class', 'issue-rules-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.disable_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.validator().disableRules(_ruleKeys);
+           });
+           ruleLinks.append('a').attr('class', 'issue-rules-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.enable_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.validator().disableRules([]);
+           }); // Update
 
+           container = container.merge(containerEnter);
+           container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+         }
 
-         var _container = select(null); // just the map
+         function drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit
 
+           items.exit().remove(); // Enter
 
-         var _oldTurns;
+           var enter = items.enter().append('li');
 
-         var _graph;
+           if (name === 'rule') {
+             enter.call(uiTooltip().title(function (d) {
+               return _t.html('issues.' + d + '.tip');
+             }).placement('top'));
+           }
 
-         var _vertexID;
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', name).on('change', change);
+           label.append('span').html(function (d) {
+             var params = {};
 
-         var _intersection;
+             if (d === 'unsquare_way') {
+               params.val = {
+                 html: '<span class="square-degrees"></span>'
+               };
+             }
 
-         var _fromWayID;
+             return _t.html('issues.' + d + '.title', params);
+           }); // Update
 
-         var _lastXPos;
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
 
-         function restrictions(selection) {
-           _parent = selection; // try to reuse the intersection, but always rebuild it if the graph has changed
+           var degStr = corePreferences('validate-square-degrees');
 
-           if (_vertexID && (context.graph() !== _graph || !_intersection)) {
-             _graph = context.graph();
-             _intersection = osmIntersection(_graph, _vertexID, _maxDistance);
-           } // It's possible for there to be no actual intersection here.
-           // for example, a vertex of two `highway=path`
-           // In this case, hide the field.
+           if (degStr === null) {
+             degStr = DEFAULTSQUARE.toString();
+           }
 
+           var span = items.selectAll('.square-degrees');
+           var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
 
-           var isOK = _intersection && _intersection.vertices.length && // has vertices
-           _intersection.vertices // has the vertex that the user selected
-           .filter(function (vertex) {
-             return vertex.id === _vertexID;
-           }).length && _intersection.ways.length > 2 && // has more than 2 ways
-           _intersection.ways // has more than 1 TO way
-           .filter(function (way) {
-             return way.__to;
-           }).length > 1; // Also hide in the case where
+           input.enter().append('input').attr('type', 'number').attr('min', MINSQUARE.toString()).attr('max', MAXSQUARE.toString()).attr('step', '0.5').attr('class', 'square-degrees-input').call(utilNoAuto).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             this.select();
+           }).on('keyup', function (d3_event) {
+             if (d3_event.keyCode === 13) {
+               // ↩ Return
+               this.blur();
+               this.select();
+             }
+           }).on('blur', changeSquare).merge(input).property('value', degStr);
+         }
 
-           select(selection.node().parentNode).classed('hide', !isOK); // if form field is hidden or has detached from dom, clean up.
+         function changeSquare() {
+           var input = select(this);
+           var degStr = utilGetSetValue(input).trim();
+           var degNum = parseFloat(degStr, 10);
 
-           if (!isOK || !context.container().select('.inspector-wrap.inspector-hidden').empty() || !selection.node().parentNode || !selection.node().parentNode.parentNode) {
-             selection.call(restrictions.off);
-             return;
+           if (!isFinite(degNum)) {
+             degNum = DEFAULTSQUARE;
+           } else if (degNum > MAXSQUARE) {
+             degNum = MAXSQUARE;
+           } else if (degNum < MINSQUARE) {
+             degNum = MINSQUARE;
            }
 
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           var container = wrap.selectAll('.restriction-container').data([0]); // enter
+           degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
 
-           var containerEnter = container.enter().append('div').attr('class', 'restriction-container');
-           containerEnter.append('div').attr('class', 'restriction-help'); // update
+           degStr = degNum.toString();
+           input.property('value', degStr);
+           corePreferences('validate-square-degrees', degStr);
+           context.validator().revalidateUnsquare();
+         }
 
-           _container = containerEnter.merge(container).call(renderViewer);
-           var controls = wrap.selectAll('.restriction-controls').data([0]); // enter/update
+         function isRuleEnabled(d) {
+           return context.validator().isRuleEnabled(d);
+         }
 
-           controls.enter().append('div').attr('class', 'restriction-controls-container').append('div').attr('class', 'restriction-controls').merge(controls).call(renderControls);
+         function toggleRule(d3_event, d) {
+           context.validator().toggleRule(d);
          }
 
-         function renderControls(selection) {
-           var distControl = selection.selectAll('.restriction-distance').data([0]);
-           distControl.exit().remove();
-           var distControlEnter = distControl.enter().append('div').attr('class', 'restriction-control restriction-distance');
-           distControlEnter.append('span').attr('class', 'restriction-control-label restriction-distance-label').html(_t.html('restriction.controls.distance') + ':');
-           distControlEnter.append('input').attr('class', 'restriction-distance-input').attr('type', 'range').attr('min', '20').attr('max', '50').attr('step', '5');
-           distControlEnter.append('span').attr('class', 'restriction-distance-text'); // update
+         context.validator().on('validated.uiSectionValidationRules', function () {
+           window.requestIdleCallback(section.reRender);
+         });
+         return section;
+       }
 
-           selection.selectAll('.restriction-distance-input').property('value', _maxDistance).on('input', function () {
-             var val = select(this).property('value');
-             _maxDistance = +val;
-             _intersection = null;
+       function uiSectionValidationStatus(context) {
+         var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
+           var issues = context.validator().getIssues(getOptions());
+           return issues.length === 0;
+         });
 
-             _container.selectAll('.layer-osm .layer-turns *').remove();
+         function getOptions() {
+           return {
+             what: corePreferences('validate-what') || 'edited',
+             where: corePreferences('validate-where') || 'all'
+           };
+         }
 
-             corePreferences('turn-restriction-distance', _maxDistance);
+         function renderContent(selection) {
+           var box = selection.selectAll('.box').data([0]);
+           var boxEnter = box.enter().append('div').attr('class', 'box');
+           boxEnter.append('div').call(svgIcon('#iD-icon-apply', 'pre-text'));
+           var noIssuesMessage = boxEnter.append('span');
+           noIssuesMessage.append('strong').attr('class', 'message');
+           noIssuesMessage.append('br');
+           noIssuesMessage.append('span').attr('class', 'details');
+           renderIgnoredIssuesReset(selection);
+           setNoIssuesText(selection);
+         }
 
-             _parent.call(restrictions);
+         function renderIgnoredIssuesReset(selection) {
+           var ignoredIssues = context.validator().getIssues({
+             what: 'all',
+             where: 'all',
+             includeDisabledRules: true,
+             includeIgnored: 'only'
            });
-           selection.selectAll('.restriction-distance-text').html(displayMaxDistance(_maxDistance));
-           var viaControl = selection.selectAll('.restriction-via-way').data([0]);
-           viaControl.exit().remove();
-           var viaControlEnter = viaControl.enter().append('div').attr('class', 'restriction-control restriction-via-way');
-           viaControlEnter.append('span').attr('class', 'restriction-control-label restriction-via-way-label').html(_t.html('restriction.controls.via') + ':');
-           viaControlEnter.append('input').attr('class', 'restriction-via-way-input').attr('type', 'range').attr('min', '0').attr('max', '2').attr('step', '1');
-           viaControlEnter.append('span').attr('class', 'restriction-via-way-text'); // update
-
-           selection.selectAll('.restriction-via-way-input').property('value', _maxViaWay).on('input', function () {
-             var val = select(this).property('value');
-             _maxViaWay = +val;
+           var resetIgnored = selection.selectAll('.reset-ignored').data(ignoredIssues.length ? [0] : []); // exit
 
-             _container.selectAll('.layer-osm .layer-turns *').remove();
+           resetIgnored.exit().remove(); // enter
 
-             corePreferences('turn-restriction-via-way0', _maxViaWay);
+           var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
+           resetIgnoredEnter.append('a').attr('href', '#'); // update
 
-             _parent.call(restrictions);
+           resetIgnored = resetIgnored.merge(resetIgnoredEnter);
+           resetIgnored.select('a').html(_t.html('inspector.title_count', {
+             title: {
+               html: _t.html('issues.reset_ignored')
+             },
+             count: ignoredIssues.length
+           }));
+           resetIgnored.on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.validator().resetIgnoredIssues();
            });
-           selection.selectAll('.restriction-via-way-text').html(displayMaxVia(_maxViaWay));
          }
 
-         function renderViewer(selection) {
-           if (!_intersection) return;
-           var vgraph = _intersection.graph;
-           var filter = utilFunctor(true);
-           var projection = geoRawMercator(); // Reflow warning: `utilGetDimensions` calls `getBoundingClientRect`
-           // Instead of asking the restriction-container for its dimensions,
-           //  we can ask the .sidebar, which can have its dimensions cached.
-           // width: calc as sidebar - padding
-           // height: hardcoded (from `80_app.css`)
-           // var d = utilGetDimensions(selection);
-
-           var sdims = utilGetDimensions(context.container().select('.sidebar'));
-           var d = [sdims[0] - 50, 370];
-           var c = geoVecScale(d, 0.5);
-           var z = 22;
-           projection.scale(geoZoomToScale(z)); // Calculate extent of all key vertices
-
-           var extent = geoExtent();
-
-           for (var i = 0; i < _intersection.vertices.length; i++) {
-             extent._extend(_intersection.vertices[i].extent());
-           } // If this is a large intersection, adjust zoom to fit extent
+         function setNoIssuesText(selection) {
+           var opts = getOptions();
 
+           function checkForHiddenIssues(cases) {
+             for (var type in cases) {
+               var hiddenOpts = cases[type];
+               var hiddenIssues = context.validator().getIssues(hiddenOpts);
 
-           if (_intersection.vertices.length > 1) {
-             var padding = 180; // in z22 pixels
+               if (hiddenIssues.length) {
+                 selection.select('.box .details').html('').call(_t.append('issues.no_issues.hidden_issues.' + type, {
+                   count: hiddenIssues.length.toString()
+                 }));
+                 return;
+               }
+             }
 
-             var tl = projection([extent[0][0], extent[1][1]]);
-             var br = projection([extent[1][0], extent[0][1]]);
-             var hFactor = (br[0] - tl[0]) / (d[0] - padding);
-             var vFactor = (br[1] - tl[1]) / (d[1] - padding);
-             var hZoomDiff = Math.log(Math.abs(hFactor)) / Math.LN2;
-             var vZoomDiff = Math.log(Math.abs(vFactor)) / Math.LN2;
-             z = z - Math.max(hZoomDiff, vZoomDiff);
-             projection.scale(geoZoomToScale(z));
+             selection.select('.box .details').html('').call(_t.append('issues.no_issues.hidden_issues.none'));
            }
 
-           var padTop = 35; // reserve top space for hint text
-
-           var extentCenter = projection(extent.center());
-           extentCenter[1] = extentCenter[1] - padTop;
-           projection.translate(geoVecSubtract(c, extentCenter)).clipExtent([[0, 0], d]);
-           var drawLayers = svgLayers(projection, context).only(['osm', 'touch']).dimensions(d);
-           var drawVertices = svgVertices(projection, context);
-           var drawLines = svgLines(projection, context);
-           var drawTurns = svgTurns(projection, context);
-           var firstTime = selection.selectAll('.surface').empty();
-           selection.call(drawLayers);
-           var surface = selection.selectAll('.surface').classed('tr', true);
-
-           if (firstTime) {
-             _initialized = true;
-             surface.call(breathe);
-           } // This can happen if we've lowered the detail while a FROM way
-           // is selected, and that way is no longer part of the intersection.
-
+           var messageType;
 
-           if (_fromWayID && !vgraph.hasEntity(_fromWayID)) {
-             _fromWayID = null;
-             _oldTurns = null;
+           if (opts.what === 'edited' && opts.where === 'visible') {
+             messageType = 'edits_in_view';
+             checkForHiddenIssues({
+               elsewhere: {
+                 what: 'edited',
+                 where: 'all'
+               },
+               everything_else: {
+                 what: 'all',
+                 where: 'visible'
+               },
+               disabled_rules: {
+                 what: 'edited',
+                 where: 'visible',
+                 includeDisabledRules: 'only'
+               },
+               everything_else_elsewhere: {
+                 what: 'all',
+                 where: 'all'
+               },
+               disabled_rules_elsewhere: {
+                 what: 'edited',
+                 where: 'all',
+                 includeDisabledRules: 'only'
+               },
+               ignored_issues: {
+                 what: 'edited',
+                 where: 'visible',
+                 includeIgnored: 'only'
+               },
+               ignored_issues_elsewhere: {
+                 what: 'edited',
+                 where: 'all',
+                 includeIgnored: 'only'
+               }
+             });
+           } else if (opts.what === 'edited' && opts.where === 'all') {
+             messageType = 'edits';
+             checkForHiddenIssues({
+               everything_else: {
+                 what: 'all',
+                 where: 'all'
+               },
+               disabled_rules: {
+                 what: 'edited',
+                 where: 'all',
+                 includeDisabledRules: 'only'
+               },
+               ignored_issues: {
+                 what: 'edited',
+                 where: 'all',
+                 includeIgnored: 'only'
+               }
+             });
+           } else if (opts.what === 'all' && opts.where === 'visible') {
+             messageType = 'everything_in_view';
+             checkForHiddenIssues({
+               elsewhere: {
+                 what: 'all',
+                 where: 'all'
+               },
+               disabled_rules: {
+                 what: 'all',
+                 where: 'visible',
+                 includeDisabledRules: 'only'
+               },
+               disabled_rules_elsewhere: {
+                 what: 'all',
+                 where: 'all',
+                 includeDisabledRules: 'only'
+               },
+               ignored_issues: {
+                 what: 'all',
+                 where: 'visible',
+                 includeIgnored: 'only'
+               },
+               ignored_issues_elsewhere: {
+                 what: 'all',
+                 where: 'all',
+                 includeIgnored: 'only'
+               }
+             });
+           } else if (opts.what === 'all' && opts.where === 'all') {
+             messageType = 'everything';
+             checkForHiddenIssues({
+               disabled_rules: {
+                 what: 'all',
+                 where: 'all',
+                 includeDisabledRules: 'only'
+               },
+               ignored_issues: {
+                 what: 'all',
+                 where: 'all',
+                 includeIgnored: 'only'
+               }
+             });
            }
 
-           surface.call(utilSetDimensions, d).call(drawVertices, vgraph, _intersection.vertices, filter, extent, z).call(drawLines, vgraph, _intersection.ways, filter).call(drawTurns, vgraph, _intersection.turns(_fromWayID, _maxViaWay));
-           surface.on('click.restrictions', click).on('mouseover.restrictions', mouseover);
-           surface.selectAll('.selected').classed('selected', false);
-           surface.selectAll('.related').classed('related', false);
-           var way;
-
-           if (_fromWayID) {
-             way = vgraph.entity(_fromWayID);
-             surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
+           if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
+             messageType = 'no_edits';
            }
 
-           document.addEventListener('resizeWindow', function () {
-             utilSetDimensions(_container, null);
-             redraw(1);
-           }, false);
-           updateHints(null);
-
-           function click(d3_event) {
-             surface.call(breathe.off).call(breathe);
-             var datum = d3_event.target.__data__;
-             var entity = datum && datum.properties && datum.properties.entity;
+           selection.select('.box .message').html('').call(_t.append('issues.no_issues.message.' + messageType));
+         }
 
-             if (entity) {
-               datum = entity;
-             }
+         context.validator().on('validated.uiSectionValidationStatus', function () {
+           window.requestIdleCallback(section.reRender);
+         });
+         context.map().on('move.uiSectionValidationStatus', debounce(function () {
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
+       }
 
-             if (datum instanceof osmWay && (datum.__from || datum.__via)) {
-               _fromWayID = datum.id;
-               _oldTurns = null;
-               redraw();
-             } else if (datum instanceof osmTurn) {
-               var actions, extraActions, turns, i;
-               var restrictionType = osmInferRestriction(vgraph, datum, projection);
+       function uiPaneIssues(context) {
+         var issuesPane = uiPane('issues', context).key(_t('issues.key')).label(_t.html('issues.title')).description(_t.html('issues.title')).iconName('iD-icon-alert').sections([uiSectionValidationOptions(context), uiSectionValidationStatus(context), uiSectionValidationIssues('issues-errors', 'error', context), uiSectionValidationIssues('issues-warnings', 'warning', context), uiSectionValidationRules(context)]);
+         return issuesPane;
+       }
 
-               if (datum.restrictionID && !datum.direct) {
-                 return;
-               } else if (datum.restrictionID && !datum.only) {
-                 // NO -> ONLY
-                 var seen = {};
-                 var datumOnly = JSON.parse(JSON.stringify(datum)); // deep clone the datum
+       function uiSettingsCustomData(context) {
+         var dispatch = dispatch$8('change');
 
-                 datumOnly.only = true; // but change this property
+         function render(selection) {
+           var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
 
-                 restrictionType = restrictionType.replace(/^no/, 'only'); // Adding an ONLY restriction should destroy all other direct restrictions from the FROM towards the VIA.
-                 // We will remember them in _oldTurns, and restore them if the user clicks again.
+           var _origSettings = {
+             fileList: dataLayer && dataLayer.fileList() || null,
+             url: corePreferences('settings-custom-data-url')
+           };
+           var _currSettings = {
+             fileList: dataLayer && dataLayer.fileList() || null,
+             url: corePreferences('settings-custom-data-url')
+           }; // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
 
-                 turns = _intersection.turns(_fromWayID, 2);
-                 extraActions = [];
-                 _oldTurns = [];
+           var modal = uiConfirm(selection).okButton();
+           modal.classed('settings-modal settings-custom-data', true);
+           modal.select('.modal-section.header').append('h3').call(_t.append('settings.custom_data.header'));
+           var textSection = modal.select('.modal-section.message-text');
+           textSection.append('pre').attr('class', 'instructions-file').call(_t.append('settings.custom_data.file.instructions'));
+           textSection.append('input').attr('class', 'field-file').attr('type', 'file').attr('accept', '.gpx,.kml,.geojson,.json,application/gpx+xml,application/vnd.google-earth.kml+xml,application/geo+json,application/json').property('files', _currSettings.fileList) // works for all except IE11
+           .on('change', function (d3_event) {
+             var files = d3_event.target.files;
 
-                 for (i = 0; i < turns.length; i++) {
-                   var turn = turns[i];
-                   if (seen[turn.restrictionID]) continue; // avoid deleting the turn twice (#4968, #4928)
+             if (files && files.length) {
+               _currSettings.url = '';
+               textSection.select('.field-url').property('value', '');
+               _currSettings.fileList = files;
+             } else {
+               _currSettings.fileList = null;
+             }
+           });
+           textSection.append('h4').call(_t.append('settings.custom_data.or'));
+           textSection.append('pre').attr('class', 'instructions-url').call(_t.append('settings.custom_data.url.instructions'));
+           textSection.append('textarea').attr('class', 'field-url').attr('placeholder', _t('settings.custom_data.url.placeholder')).call(utilNoAuto).property('value', _currSettings.url); // insert a cancel button
 
-                   if (turn.direct && turn.path[1] === datum.path[1]) {
-                     seen[turns[i].restrictionID] = true;
-                     turn.restrictionType = osmInferRestriction(vgraph, turn, projection);
+           var buttonSection = modal.select('.modal-section.buttons');
+           buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').call(_t.append('confirm.cancel'));
+           buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
+           buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
 
-                     _oldTurns.push(turn);
+           function isSaveDisabled() {
+             return null;
+           } // restore the original url
 
-                     extraActions.push(actionUnrestrictTurn(turn));
-                   }
-                 }
 
-                 actions = _intersection.actions.concat(extraActions, [actionRestrictTurn(datumOnly, restrictionType), _t('operations.restriction.annotation.create')]);
-               } else if (datum.restrictionID) {
-                 // ONLY -> Allowed
-                 // Restore whatever restrictions we might have destroyed by cycling thru the ONLY state.
-                 // This relies on the assumption that the intersection was already split up when we
-                 // performed the previous action (NO -> ONLY), so the IDs in _oldTurns shouldn't have changed.
-                 turns = _oldTurns || [];
-                 extraActions = [];
+           function clickCancel() {
+             textSection.select('.field-url').property('value', _origSettings.url);
+             corePreferences('settings-custom-data-url', _origSettings.url);
+             this.blur();
+             modal.close();
+           } // accept the current url
 
-                 for (i = 0; i < turns.length; i++) {
-                   if (turns[i].key !== datum.key) {
-                     extraActions.push(actionRestrictTurn(turns[i], turns[i].restrictionType));
-                   }
-                 }
 
-                 _oldTurns = null;
-                 actions = _intersection.actions.concat(extraActions, [actionUnrestrictTurn(datum), _t('operations.restriction.annotation.delete')]);
-               } else {
-                 // Allowed -> NO
-                 actions = _intersection.actions.concat([actionRestrictTurn(datum, restrictionType), _t('operations.restriction.annotation.create')]);
-               }
+           function clickSave() {
+             _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
 
-               context.perform.apply(context, actions); // At this point the datum will be changed, but will have same key..
-               // Refresh it and update the help..
+             if (_currSettings.url) {
+               _currSettings.fileList = null;
+             }
 
-               var s = surface.selectAll('.' + datum.key);
-               datum = s.empty() ? null : s.datum();
-               updateHints(datum);
-             } else {
-               _fromWayID = null;
-               _oldTurns = null;
-               redraw();
+             if (_currSettings.fileList) {
+               _currSettings.url = '';
              }
-           }
 
-           function mouseover(d3_event) {
-             var datum = d3_event.target.__data__;
-             updateHints(datum);
+             corePreferences('settings-custom-data-url', _currSettings.url);
+             this.blur();
+             modal.close();
+             dispatch.call('change', this, _currSettings);
            }
+         }
 
-           _lastXPos = _lastXPos || sdims[0];
+         return utilRebind(render, dispatch, 'on');
+       }
 
-           function redraw(minChange) {
-             var xPos = -1;
+       function uiSectionDataLayers(context) {
+         var settingsCustomData = uiSettingsCustomData(context).on('change', customChanged);
+         var layers = context.layers();
+         var section = uiSection('data-layers', context).label(_t.html('map_data.data_layers')).disclosureContent(renderDisclosureContent);
 
-             if (minChange) {
-               xPos = utilGetDimensions(context.container().select('.sidebar'))[0];
-             }
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.data-layer-container').data([0]);
+           container.enter().append('div').attr('class', 'data-layer-container').merge(container).call(drawOsmItems).call(drawQAItems).call(drawCustomDataItems).call(drawVectorItems) // Beta - Detroit mapping challenge
+           .call(drawPanelItems);
+         }
 
-             if (!minChange || minChange && Math.abs(xPos - _lastXPos) >= minChange) {
-               if (context.hasEntity(_vertexID)) {
-                 _lastXPos = xPos;
+         function showsLayer(which) {
+           var layer = layers.layer(which);
 
-                 _container.call(renderViewer);
-               }
-             }
+           if (layer) {
+             return layer.enabled();
            }
 
-           function highlightPathsFrom(wayID) {
-             surface.selectAll('.related').classed('related', false).classed('allow', false).classed('restrict', false).classed('only', false);
-             surface.selectAll('.' + wayID).classed('related', true);
-
-             if (wayID) {
-               var turns = _intersection.turns(wayID, _maxViaWay);
+           return false;
+         }
 
-               for (var i = 0; i < turns.length; i++) {
-                 var turn = turns[i];
-                 var ids = [turn.to.way];
-                 var klass = turn.no ? 'restrict' : turn.only ? 'only' : 'allow';
+         function setLayer(which, enabled) {
+           // Don't allow layer changes while drawing - #6584
+           var mode = context.mode();
+           if (mode && /^draw/.test(mode.id)) return;
+           var layer = layers.layer(which);
 
-                 if (turn.only || turns.length === 1) {
-                   if (turn.via.ways) {
-                     ids = ids.concat(turn.via.ways);
-                   }
-                 } else if (turn.to.way === wayID) {
-                   continue;
-                 }
+           if (layer) {
+             layer.enabled(enabled);
 
-                 surface.selectAll(utilEntitySelector(ids)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only');
-               }
+             if (!enabled && (which === 'osm' || which === 'notes')) {
+               context.enter(modeBrowse(context));
              }
            }
+         }
 
-           function updateHints(datum) {
-             var help = _container.selectAll('.restriction-help').html('');
-
-             var placeholders = {};
-             ['from', 'via', 'to'].forEach(function (k) {
-               placeholders[k] = '<span class="qualifier">' + _t('restriction.help.' + k) + '</span>';
-             });
-             var entity = datum && datum.properties && datum.properties.entity;
+         function toggleLayer(which) {
+           setLayer(which, !showsLayer(which));
+         }
 
-             if (entity) {
-               datum = entity;
+         function drawOsmItems(selection) {
+           var osmKeys = ['osm', 'notes'];
+           var osmLayers = layers.all().filter(function (obj) {
+             return osmKeys.indexOf(obj.id) !== -1;
+           });
+           var ul = selection.selectAll('.layer-list-osm').data([0]);
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-osm').merge(ul);
+           var li = ul.selectAll('.list-item').data(osmLayers);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             return 'list-item list-item-' + d.id;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             if (d.id === 'osm') {
+               select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))]).placement('bottom'));
+             } else {
+               select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
              }
+           });
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             toggleLayer(d.id);
+           });
+           labelEnter.append('span').html(function (d) {
+             return _t.html('map_data.layers.' + d.id + '.title');
+           }); // Update
 
-             if (_fromWayID) {
-               way = vgraph.entity(_fromWayID);
-               surface.selectAll('.' + _fromWayID).classed('selected', true).classed('related', true);
-             } // Hovering a way
-
+           li.merge(liEnter).classed('active', function (d) {
+             return d.layer.enabled();
+           }).selectAll('input').property('checked', function (d) {
+             return d.layer.enabled();
+           });
+         }
 
-             if (datum instanceof osmWay && datum.__from) {
-               way = datum;
-               highlightPathsFrom(_fromWayID ? null : way.id);
-               surface.selectAll('.' + way.id).classed('related', true);
-               var clickSelect = !_fromWayID || _fromWayID !== way.id;
-               help.append('div') // "Click to select FROM {fromName}." / "FROM {fromName}"
-               .html(_t.html('restriction.help.' + (clickSelect ? 'select_from_name' : 'from_name'), {
-                 from: placeholders.from,
-                 fromName: displayName(way.id, vgraph)
-               })); // Hovering a turn arrow
-             } else if (datum instanceof osmTurn) {
-               var restrictionType = osmInferRestriction(vgraph, datum, projection);
-               var turnType = restrictionType.replace(/^(only|no)\_/, '');
-               var indirect = datum.direct === false ? _t.html('restriction.help.indirect') : '';
-               var klass, turnText, nextText;
+         function drawQAItems(selection) {
+           var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
+           var qaLayers = layers.all().filter(function (obj) {
+             return qaKeys.indexOf(obj.id) !== -1;
+           });
+           var ul = selection.selectAll('.layer-list-qa').data([0]);
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-qa').merge(ul);
+           var li = ul.selectAll('.list-item').data(qaLayers);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             return 'list-item list-item-' + d.id;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
+           });
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             toggleLayer(d.id);
+           });
+           labelEnter.append('span').html(function (d) {
+             return _t.html('map_data.layers.' + d.id + '.title');
+           }); // Update
 
-               if (datum.no) {
-                 klass = 'restrict';
-                 turnText = _t.html('restriction.help.turn.no_' + turnType, {
-                   indirect: indirect
-                 });
-                 nextText = _t.html('restriction.help.turn.only_' + turnType, {
-                   indirect: ''
-                 });
-               } else if (datum.only) {
-                 klass = 'only';
-                 turnText = _t.html('restriction.help.turn.only_' + turnType, {
-                   indirect: indirect
-                 });
-                 nextText = _t.html('restriction.help.turn.allowed_' + turnType, {
-                   indirect: ''
-                 });
-               } else {
-                 klass = 'allow';
-                 turnText = _t.html('restriction.help.turn.allowed_' + turnType, {
-                   indirect: indirect
-                 });
-                 nextText = _t.html('restriction.help.turn.no_' + turnType, {
-                   indirect: ''
-                 });
-               }
+           li.merge(liEnter).classed('active', function (d) {
+             return d.layer.enabled();
+           }).selectAll('input').property('checked', function (d) {
+             return d.layer.enabled();
+           });
+         } // Beta feature - sample vector layers to support Detroit Mapping Challenge
+         // https://github.com/osmus/detroit-mapping-challenge
 
-               help.append('div') // "NO Right Turn (indirect)"
-               .attr('class', 'qualifier ' + klass).html(turnText);
-               help.append('div') // "FROM {fromName} TO {toName}"
-               .html(_t.html('restriction.help.from_name_to_name', {
-                 from: placeholders.from,
-                 fromName: displayName(datum.from.way, vgraph),
-                 to: placeholders.to,
-                 toName: displayName(datum.to.way, vgraph)
-               }));
 
-               if (datum.via.ways && datum.via.ways.length) {
-                 var names = [];
+         function drawVectorItems(selection) {
+           var dataLayer = layers.layer('data');
+           var vtData = [{
+             name: 'Detroit Neighborhoods/Parks',
+             src: 'neighborhoods-parks',
+             tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
+             template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+           }, {
+             name: 'Detroit Composite POIs',
+             src: 'composite-poi',
+             tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
+             template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+           }, {
+             name: 'Detroit All-The-Places POIs',
+             src: 'alltheplaces-poi',
+             tooltip: 'Public domain business location data created by web scrapers.',
+             template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
+           }]; // Only show this if the map is around Detroit..
 
-                 for (var i = 0; i < datum.via.ways.length; i++) {
-                   var prev = names[names.length - 1];
-                   var curr = displayName(datum.via.ways[i], vgraph);
-                   if (!prev || curr !== prev) // collapse identical names
-                     names.push(curr);
-                 }
+           var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
+           var showVectorItems = context.map().zoom() > 9 && detroit.contains(context.map().center());
+           var container = selection.selectAll('.vectortile-container').data(showVectorItems ? [0] : []);
+           container.exit().remove();
+           var containerEnter = container.enter().append('div').attr('class', 'vectortile-container');
+           containerEnter.append('h4').attr('class', 'vectortile-header').text('Detroit Vector Tiles (Beta)');
+           containerEnter.append('ul').attr('class', 'layer-list layer-list-vectortile');
+           containerEnter.append('div').attr('class', 'vectortile-footer').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmus/detroit-mapping-challenge').append('span').text('About these layers');
+           container = container.merge(containerEnter);
+           var ul = container.selectAll('.layer-list-vectortile');
+           var li = ul.selectAll('.list-item').data(vtData);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             return 'list-item list-item-' + d.src;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             select(this).call(uiTooltip().title(d.tooltip).placement('top'));
+           });
+           labelEnter.append('input').attr('type', 'radio').attr('name', 'vectortile').on('change', selectVTLayer);
+           labelEnter.append('span').text(function (d) {
+             return d.name;
+           }); // Update
 
-                 help.append('div') // "VIA {viaNames}"
-                 .html(_t.html('restriction.help.via_names', {
-                   via: placeholders.via,
-                   viaNames: names.join(', ')
-                 }));
-               }
+           li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);
 
-               if (!indirect) {
-                 help.append('div') // Click for "No Right Turn"
-                 .html(_t.html('restriction.help.toggle', {
-                   turn: nextText.trim()
-                 }));
-               }
+           function isVTLayerSelected(d) {
+             return dataLayer && dataLayer.template() === d.template;
+           }
 
-               highlightPathsFrom(null);
-               var alongIDs = datum.path.slice();
-               surface.selectAll(utilEntitySelector(alongIDs)).classed('related', true).classed('allow', klass === 'allow').classed('restrict', klass === 'restrict').classed('only', klass === 'only'); // Hovering empty surface
-             } else {
-               highlightPathsFrom(null);
+           function selectVTLayer(d3_event, d) {
+             corePreferences('settings-custom-data-url', d.template);
 
-               if (_fromWayID) {
-                 help.append('div') // "FROM {fromName}"
-                 .html(_t.html('restriction.help.from_name', {
-                   from: placeholders.from,
-                   fromName: displayName(_fromWayID, vgraph)
-                 }));
-               } else {
-                 help.append('div') // "Click to select a FROM segment."
-                 .html(_t.html('restriction.help.select_from', {
-                   from: placeholders.from
-                 }));
-               }
+             if (dataLayer) {
+               dataLayer.template(d.template, d.src);
+               dataLayer.enabled(true);
              }
            }
          }
 
-         function displayMaxDistance(maxDist) {
-           var isImperial = !_mainLocalizer.usesMetric();
-           var opts;
+         function drawCustomDataItems(selection) {
+           var dataLayer = layers.layer('data');
+           var hasData = dataLayer && dataLayer.hasData();
+           var showsData = hasData && dataLayer.enabled();
+           var ul = selection.selectAll('.layer-list-data').data(dataLayer ? [0] : []); // Exit
 
-           if (isImperial) {
-             var distToFeet = {
-               // imprecise conversion for prettier display
-               20: 70,
-               25: 85,
-               30: 100,
-               35: 115,
-               40: 130,
-               45: 145,
-               50: 160
-             }[maxDist];
-             opts = {
-               distance: _t('units.feet', {
-                 quantity: distToFeet
-               })
-             };
-           } else {
-             opts = {
-               distance: _t('units.meters', {
-                 quantity: maxDist
-               })
-             };
-           }
+           ul.exit().remove(); // Enter
 
-           return _t.html('restriction.controls.distance_up_to', opts);
-         }
+           var ulEnter = ul.enter().append('ul').attr('class', 'layer-list layer-list-data');
+           var liEnter = ulEnter.append('li').attr('class', 'list-item-data');
+           var labelEnter = liEnter.append('label').call(uiTooltip().title(_t.html('map_data.layers.custom.tooltip')).placement('top'));
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function () {
+             toggleLayer('data');
+           });
+           labelEnter.append('span').call(_t.append('map_data.layers.custom.title'));
+           liEnter.append('button').attr('class', 'open-data-options').call(uiTooltip().title(_t.html('settings.custom_data.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             editCustom();
+           }).call(svgIcon('#iD-icon-more'));
+           liEnter.append('button').attr('class', 'zoom-to-data').call(uiTooltip().title(_t.html('map_data.layers.custom.zoom')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
+             if (select(this).classed('disabled')) return;
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             dataLayer.fitZoom();
+           }).call(svgIcon('#iD-icon-framed-dot', 'monochrome')); // Update
 
-         function displayMaxVia(maxVia) {
-           return maxVia === 0 ? _t.html('restriction.controls.via_node_only') : maxVia === 1 ? _t.html('restriction.controls.via_up_to_one') : _t.html('restriction.controls.via_up_to_two');
+           ul = ul.merge(ulEnter);
+           ul.selectAll('.list-item-data').classed('active', showsData).selectAll('label').classed('deemphasize', !hasData).selectAll('input').property('disabled', !hasData).property('checked', showsData);
+           ul.selectAll('button.zoom-to-data').classed('disabled', !hasData);
          }
 
-         function displayName(entityID, graph) {
-           var entity = graph.entity(entityID);
-           var name = utilDisplayName(entity) || '';
-           var matched = _mainPresetIndex.match(entity, graph);
-           var type = matched && matched.name() || utilDisplayType(entity.id);
-           return name || type;
+         function editCustom() {
+           context.container().call(settingsCustomData);
          }
 
-         restrictions.entityIDs = function (val) {
-           _intersection = null;
-           _fromWayID = null;
-           _oldTurns = null;
-           _vertexID = val[0];
-         };
-
-         restrictions.tags = function () {};
+         function customChanged(d) {
+           var dataLayer = layers.layer('data');
 
-         restrictions.focus = function () {};
+           if (d && d.url) {
+             dataLayer.url(d.url);
+           } else if (d && d.fileList) {
+             dataLayer.fileList(d.fileList);
+           }
+         }
 
-         restrictions.off = function (selection) {
-           if (!_initialized) return;
-           selection.selectAll('.surface').call(breathe.off).on('click.restrictions', null).on('mouseover.restrictions', null);
-           select(window).on('resize.restrictions', null);
-         };
+         function drawPanelItems(selection) {
+           var panelsListEnter = selection.selectAll('.md-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list md-extras-list');
+           var historyPanelLabelEnter = panelsListEnter.append('li').attr('class', 'history-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.history_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))]).placement('top'));
+           historyPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             context.ui().info.toggle('history');
+           });
+           historyPanelLabelEnter.append('span').call(_t.append('map_data.history_panel.title'));
+           var measurementPanelLabelEnter = panelsListEnter.append('li').attr('class', 'measurement-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.measurement_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))]).placement('top'));
+           measurementPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
+             d3_event.preventDefault();
+             context.ui().info.toggle('measurement');
+           });
+           measurementPanelLabelEnter.append('span').call(_t.append('map_data.measurement_panel.title'));
+         }
 
-         return utilRebind(restrictions, dispatch$1, 'on');
+         context.layers().on('change.uiSectionDataLayers', section.reRender);
+         context.map().on('move.uiSectionDataLayers', debounce(function () {
+           // Detroit layers may have moved in or out of view
+           window.requestIdleCallback(section.reRender);
+         }, 1000));
+         return section;
        }
-       uiFieldRestrictions.supportsMultiselection = false;
 
-       function uiFieldTextarea(field, context) {
-         var dispatch$1 = dispatch('change');
-         var input = select(null);
+       function uiSectionMapFeatures(context) {
+         var _features = context.features().keys();
 
-         var _tags;
+         var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-         function textarea(selection) {
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           input = wrap.selectAll('textarea').data([0]);
-           input = input.enter().append('textarea').attr('id', field.domId).call(utilNoAuto).on('input', change(true)).on('blur', change()).on('change', change()).merge(input);
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.layer-feature-list-container').data([0]);
+           var containerEnter = container.enter().append('div').attr('class', 'layer-feature-list-container');
+           containerEnter.append('ul').attr('class', 'layer-list layer-feature-list');
+           var footer = containerEnter.append('div').attr('class', 'feature-list-links section-footer');
+           footer.append('a').attr('class', 'feature-list-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.disable_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.features().disableAll();
+           });
+           footer.append('a').attr('class', 'feature-list-link').attr('role', 'button').attr('href', '#').call(_t.append('issues.enable_all')).on('click', function (d3_event) {
+             d3_event.preventDefault();
+             context.features().enableAll();
+           }); // Update
+
+           container = container.merge(containerEnter);
+           container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
          }
 
-         function change(onInput) {
-           return function () {
-             var val = utilGetSetValue(input);
-             if (!onInput) val = context.cleanTagValue(val); // don't override multiple values with blank string
+         function drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit
 
-             if (!val && Array.isArray(_tags[field.key])) return;
-             var t = {};
-             t[field.key] = val || undefined;
-             dispatch$1.call('change', this, t, onInput);
-           };
-         }
+           items.exit().remove(); // Enter
 
-         textarea.tags = function (tags) {
-           _tags = tags;
-           var isMixed = Array.isArray(tags[field.key]);
-           utilGetSetValue(input, !isMixed && tags[field.key] ? tags[field.key] : '').attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : undefined).attr('placeholder', isMixed ? _t('inspector.multiple_values') : field.placeholder() || _t('inspector.unknown')).classed('mixed', isMixed);
-         };
+           var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+             var tip = _t.html(name + '.' + d + '.tooltip');
 
-         textarea.focus = function () {
-           input.node().focus();
-         };
+             if (autoHiddenFeature(d)) {
+               var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
+               tip += '<div>' + msg + '</div>';
+             }
 
-         return utilRebind(textarea, dispatch$1, 'on');
-       }
+             return tip;
+           }).placement('top'));
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', name).on('change', change);
+           label.append('span').html(function (d) {
+             return _t.html(name + '.' + d + '.description');
+           }); // Update
 
-       function uiFieldWikidata(field, context) {
-         var wikidata = services.wikidata;
-         var dispatch$1 = dispatch('change');
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
+         }
 
-         var _selection = select(null);
+         function autoHiddenFeature(d) {
+           return context.features().autoHidden(d);
+         }
 
-         var _searchInput = select(null);
+         function showsFeature(d) {
+           return context.features().enabled(d);
+         }
 
-         var _qid = null;
-         var _wikidataEntity = null;
-         var _wikiURL = '';
-         var _entityIDs = [];
+         function clickFeature(d3_event, d) {
+           context.features().toggle(d);
+         }
 
-         var _wikipediaKey = field.keys && field.keys.find(function (key) {
-           return key.includes('wikipedia');
-         }),
-             _hintKey = field.key === 'wikidata' ? 'name' : field.key.split(':')[0];
+         function showsLayer(id) {
+           var layer = context.layers().layer(id);
+           return layer && layer.enabled();
+         } // add listeners
 
-         var combobox = uiCombobox(context, 'combo-' + field.safeid).caseSensitive(true).minItems(1);
 
-         function wiki(selection) {
-           _selection = selection;
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', 'form-field-input-wrap form-field-input-' + field.type).merge(wrap);
-           var list = wrap.selectAll('ul').data([0]);
-           list = list.enter().append('ul').attr('class', 'rows').merge(list);
-           var searchRow = list.selectAll('li.wikidata-search').data([0]);
-           var searchRowEnter = searchRow.enter().append('li').attr('class', 'wikidata-search');
-           searchRowEnter.append('input').attr('type', 'text').attr('id', field.domId).style('flex', '1').call(utilNoAuto).on('focus', function () {
-             var node = select(this).node();
-             node.setSelectionRange(0, node.value.length);
-           }).on('blur', function () {
-             setLabelForEntity();
-           }).call(combobox.fetcher(fetchWikidataItems));
-           combobox.on('accept', function (d) {
-             if (d) {
-               _qid = d.id;
-               change();
-             }
-           }).on('cancel', function () {
-             setLabelForEntity();
-           });
-           searchRowEnter.append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
-             domain: 'wikidata.org'
-           })).call(svgIcon('#iD-icon-out-link')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             if (_wikiURL) window.open(_wikiURL, '_blank');
-           });
-           searchRow = searchRow.merge(searchRowEnter);
-           _searchInput = searchRow.select('input');
-           var wikidataProperties = ['description', 'identifier'];
-           var items = list.selectAll('li.labeled-input').data(wikidataProperties); // Enter
+         context.features().on('change.map_features', section.reRender);
+         return section;
+       }
 
-           var enter = items.enter().append('li').attr('class', function (d) {
-             return 'labeled-input preset-wikidata-' + d;
-           });
-           enter.append('span').attr('class', 'label').html(function (d) {
-             return _t.html('wikidata.' + d);
-           });
-           enter.append('input').attr('type', 'text').call(utilNoAuto).classed('disabled', 'true').attr('readonly', 'true');
-           enter.append('button').attr('class', 'form-field-button').attr('title', _t('icons.copy')).call(svgIcon('#iD-operation-copy')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             select(this.parentNode).select('input').node().select();
-             document.execCommand('copy');
+       function uiSectionMapStyleOptions(context) {
+         var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.layer-fill-list').data([0]);
+           container.enter().append('ul').attr('class', 'layer-list layer-fill-list').merge(container).call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
+           var container2 = selection.selectAll('.layer-visual-diff-list').data([0]);
+           container2.enter().append('ul').attr('class', 'layer-list layer-visual-diff-list').merge(container2).call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function () {
+             return context.surface().classed('highlight-edited');
            });
          }
 
-         function fetchWikidataItems(q, callback) {
-           if (!q && _hintKey) {
-             // other tags may be good search terms
-             for (var i in _entityIDs) {
-               var entity = context.hasEntity(_entityIDs[i]);
-
-               if (entity.tags[_hintKey]) {
-                 q = entity.tags[_hintKey];
-                 break;
-               }
-             }
-           }
+         function drawListItems(selection, data, type, name, change, active) {
+           var items = selection.selectAll('li').data(data); // Exit
 
-           wikidata.itemsForSearchQuery(q, function (err, data) {
-             if (err) return;
+           items.exit().remove(); // Enter
 
-             for (var i in data) {
-               data[i].value = data[i].label + ' (' + data[i].id + ')';
-               data[i].title = data[i].description;
-             }
+           var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
+             return _t.html(name + '.' + d + '.tooltip');
+           }).keys(function (d) {
+             var key = d === 'wireframe' ? _t('area_fill.wireframe.key') : null;
+             if (d === 'highlight_edits') key = _t('map_data.highlight_edits.key');
+             return key ? [key] : null;
+           }).placement('top'));
+           var label = enter.append('label');
+           label.append('input').attr('type', type).attr('name', name).on('change', change);
+           label.append('span').html(function (d) {
+             return _t.html(name + '.' + d + '.description');
+           }); // Update
 
-             if (callback) callback(data);
-           });
+           items = items.merge(enter);
+           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
          }
 
-         function change() {
-           var syncTags = {};
-           syncTags[field.key] = _qid;
-           dispatch$1.call('change', this, syncTags); // attempt asynchronous update of wikidata tag..
+         function isActiveFill(d) {
+           return context.map().activeAreaFill() === d;
+         }
 
-           var initGraph = context.graph();
-           var initEntityIDs = _entityIDs;
-           wikidata.entityByQID(_qid, function (err, entity) {
-             if (err) return; // If graph has changed, we can't apply this update.
+         function toggleHighlightEdited(d3_event) {
+           d3_event.preventDefault();
+           context.map().toggleHighlightEdited();
+         }
 
-             if (context.graph() !== initGraph) return;
-             if (!entity.sitelinks) return;
-             var langs = wikidata.languagesToQuery(); // use the label and description languages as fallbacks
+         function setFill(d3_event, d) {
+           context.map().activeAreaFill(d);
+         }
 
-             ['labels', 'descriptions'].forEach(function (key) {
-               if (!entity[key]) return;
-               var valueLangs = Object.keys(entity[key]);
-               if (valueLangs.length === 0) return;
-               var valueLang = valueLangs[0];
+         context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
+         return section;
+       }
 
-               if (langs.indexOf(valueLang) === -1) {
-                 langs.push(valueLang);
-               }
-             });
-             var newWikipediaValue;
+       function uiSectionPhotoOverlays(context) {
+         var layers = context.layers();
+         var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
 
-             if (_wikipediaKey) {
-               var foundPreferred;
+         function renderDisclosureContent(selection) {
+           var container = selection.selectAll('.photo-overlay-container').data([0]);
+           container.enter().append('div').attr('class', 'photo-overlay-container').merge(container).call(drawPhotoItems).call(drawPhotoTypeItems).call(drawDateFilter).call(drawUsernameFilter);
+         }
 
-               for (var i in langs) {
-                 var lang = langs[i];
-                 var siteID = lang.replace('-', '_') + 'wiki';
+         function drawPhotoItems(selection) {
+           var photoKeys = context.photos().overlayLayerIDs();
+           var photoLayers = layers.all().filter(function (obj) {
+             return photoKeys.indexOf(obj.id) !== -1;
+           });
+           var data = photoLayers.filter(function (obj) {
+             return obj.layer.supported();
+           });
 
-                 if (entity.sitelinks[siteID]) {
-                   foundPreferred = true;
-                   newWikipediaValue = lang + ':' + entity.sitelinks[siteID].title; // use the first match
+           function layerSupported(d) {
+             return d.layer && d.layer.supported();
+           }
 
-                   break;
-                 }
-               }
+           function layerEnabled(d) {
+             return layerSupported(d) && d.layer.enabled();
+           }
 
-               if (!foundPreferred) {
-                 // No wikipedia sites available in the user's language or the fallback languages,
-                 // default to any wikipedia sitelink
-                 var wikiSiteKeys = Object.keys(entity.sitelinks).filter(function (site) {
-                   return site.endsWith('wiki');
-                 });
+           var ul = selection.selectAll('.layer-list-photos').data([0]);
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photos').merge(ul);
+           var li = ul.selectAll('.list-item-photos').data(data);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             var classes = 'list-item-photos list-item-' + d.id;
 
-                 if (wikiSiteKeys.length === 0) {
-                   // if no wikipedia pages are linked to this wikidata entity, delete that tag
-                   newWikipediaValue = null;
-                 } else {
-                   var wikiLang = wikiSiteKeys[0].slice(0, -4).replace('_', '-');
-                   var wikiTitle = entity.sitelinks[wikiSiteKeys[0]].title;
-                   newWikipediaValue = wikiLang + ':' + wikiTitle;
-                 }
-               }
+             if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
+               classes += ' indented';
              }
 
-             if (newWikipediaValue) {
-               newWikipediaValue = context.cleanTagValue(newWikipediaValue);
-             }
+             return classes;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             var titleID;
+             if (d.id === 'mapillary-signs') titleID = 'mapillary.signs.tooltip';else if (d.id === 'mapillary') titleID = 'mapillary_images.tooltip';else if (d.id === 'kartaview') titleID = 'kartaview_images.tooltip';else titleID = d.id.replace(/-/g, '_') + '.tooltip';
+             select(this).call(uiTooltip().title(_t.html(titleID)).placement('top'));
+           });
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             toggleLayer(d.id);
+           });
+           labelEnter.append('span').html(function (d) {
+             var id = d.id;
+             if (id === 'mapillary-signs') id = 'photo_overlays.traffic_signs';
+             return _t.html(id.replace(/-/g, '_') + '.title');
+           }); // Update
 
-             if (typeof newWikipediaValue === 'undefined') return;
-             var actions = initEntityIDs.map(function (entityID) {
-               var entity = context.hasEntity(entityID);
-               if (!entity) return null;
-               var currTags = Object.assign({}, entity.tags); // shallow copy
+           li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
+         }
 
-               if (newWikipediaValue === null) {
-                 if (!currTags[_wikipediaKey]) return null;
-                 delete currTags[_wikipediaKey];
-               } else {
-                 currTags[_wikipediaKey] = newWikipediaValue;
-               }
+         function drawPhotoTypeItems(selection) {
+           var data = context.photos().allPhotoTypes();
 
-               return actionChangeTags(entityID, currTags);
-             }).filter(Boolean);
-             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+           function typeEnabled(d) {
+             return context.photos().showsPhotoType(d);
+           }
+
+           var ul = selection.selectAll('.layer-list-photo-types').data([0]);
+           ul.exit().remove();
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photo-types').merge(ul);
+           var li = ul.selectAll('.list-item-photo-types').data(context.photos().shouldFilterByPhotoType() ? data : []);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', function (d) {
+             return 'list-item-photo-types list-item-' + d;
+           });
+           var labelEnter = liEnter.append('label').each(function (d) {
+             select(this).call(uiTooltip().title(_t.html('photo_overlays.photo_type.' + d + '.tooltip')).placement('top'));
+           });
+           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
+             context.photos().togglePhotoType(d);
+           });
+           labelEnter.append('span').html(function (d) {
+             return _t.html('photo_overlays.photo_type.' + d + '.title');
+           }); // Update
+
+           li.merge(liEnter).classed('active', typeEnabled).selectAll('input').property('checked', typeEnabled);
+         }
+
+         function drawDateFilter(selection) {
+           var data = context.photos().dateFilters();
+
+           function filterEnabled(d) {
+             return context.photos().dateFilterValue(d);
+           }
+
+           var ul = selection.selectAll('.layer-list-date-filter').data([0]);
+           ul.exit().remove();
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-date-filter').merge(ul);
+           var li = ul.selectAll('.list-item-date-filter').data(context.photos().shouldFilterByDate() ? data : []);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', 'list-item-date-filter');
+           var labelEnter = liEnter.append('label').each(function (d) {
+             select(this).call(uiTooltip().title(_t.html('photo_overlays.date_filter.' + d + '.tooltip')).placement('top'));
+           });
+           labelEnter.append('span').html(function (d) {
+             return _t.html('photo_overlays.date_filter.' + d + '.title');
+           });
+           labelEnter.append('input').attr('type', 'date').attr('class', 'list-item-input').attr('placeholder', _t('units.year_month_day')).call(utilNoAuto).each(function (d) {
+             utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+           }).on('change', function (d3_event, d) {
+             var value = utilGetSetValue(select(this)).trim();
+             context.photos().setDateFilter(d, value, true); // reload the displayed dates
 
-             context.overwrite(function actionUpdateWikipediaTags(graph) {
-               actions.forEach(function (action) {
-                 graph = action(graph);
-               });
-               return graph;
-             }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
-             // changeTags() is not intended to be called asynchronously
+             li.selectAll('input').each(function (d) {
+               utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
+             });
            });
+           li = li.merge(liEnter).classed('active', filterEnabled);
          }
 
-         function setLabelForEntity() {
-           var label = '';
+         function drawUsernameFilter(selection) {
+           function filterEnabled() {
+             return context.photos().usernames();
+           }
 
-           if (_wikidataEntity) {
-             label = entityPropertyForDisplay(_wikidataEntity, 'labels');
+           var ul = selection.selectAll('.layer-list-username-filter').data([0]);
+           ul.exit().remove();
+           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-username-filter').merge(ul);
+           var li = ul.selectAll('.list-item-username-filter').data(context.photos().shouldFilterByUsername() ? ['username-filter'] : []);
+           li.exit().remove();
+           var liEnter = li.enter().append('li').attr('class', 'list-item-username-filter');
+           var labelEnter = liEnter.append('label').each(function () {
+             select(this).call(uiTooltip().title(_t.html('photo_overlays.username_filter.tooltip')).placement('top'));
+           });
+           labelEnter.append('span').call(_t.append('photo_overlays.username_filter.title'));
+           labelEnter.append('input').attr('type', 'text').attr('class', 'list-item-input').call(utilNoAuto).property('value', usernameValue).on('change', function () {
+             var value = select(this).property('value');
+             context.photos().setUsernameFilter(value, true);
+             select(this).property('value', usernameValue);
+           });
+           li.merge(liEnter).classed('active', filterEnabled);
 
-             if (label.length === 0) {
-               label = _wikidataEntity.id.toString();
-             }
+           function usernameValue() {
+             var usernames = context.photos().usernames();
+             if (usernames) return usernames.join('; ');
+             return usernames;
            }
+         }
 
-           utilGetSetValue(_searchInput, label);
+         function toggleLayer(which) {
+           setLayer(which, !showsLayer(which));
          }
 
-         wiki.tags = function (tags) {
-           var isMixed = Array.isArray(tags[field.key]);
+         function showsLayer(which) {
+           var layer = layers.layer(which);
 
-           _searchInput.attr('title', isMixed ? tags[field.key].filter(Boolean).join('\n') : null).attr('placeholder', isMixed ? _t('inspector.multiple_values') : '').classed('mixed', isMixed);
+           if (layer) {
+             return layer.enabled();
+           }
 
-           _qid = typeof tags[field.key] === 'string' && tags[field.key] || '';
+           return false;
+         }
 
-           if (!/^Q[0-9]*$/.test(_qid)) {
-             // not a proper QID
-             unrecognized();
-             return;
-           } // QID value in correct format
+         function setLayer(which, enabled) {
+           var layer = layers.layer(which);
 
+           if (layer) {
+             layer.enabled(enabled);
+           }
+         }
 
-           _wikiURL = 'https://wikidata.org/wiki/' + _qid;
-           wikidata.entityByQID(_qid, function (err, entity) {
-             if (err) {
-               unrecognized();
-               return;
-             }
+         context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
+         context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
+         return section;
+       }
 
-             _wikidataEntity = entity;
-             setLabelForEntity();
-             var description = entityPropertyForDisplay(entity, 'descriptions');
+       function uiPaneMapData(context) {
+         var mapDataPane = uiPane('map-data', context).key(_t('map_data.key')).label(_t.html('map_data.title')).description(_t.html('map_data.description')).iconName('iD-icon-data').sections([uiSectionDataLayers(context), uiSectionPhotoOverlays(context), uiSectionMapStyleOptions(context), uiSectionMapFeatures(context)]);
+         return mapDataPane;
+       }
 
-             _selection.select('button.wiki-link').classed('disabled', false);
+       function uiPanePreferences(context) {
+         var preferencesPane = uiPane('preferences', context).key(_t('preferences.key')).label(_t.html('preferences.title')).description(_t.html('preferences.description')).iconName('fas-user-cog').sections([uiSectionPrivacy(context)]);
+         return preferencesPane;
+       }
 
-             _selection.select('.preset-wikidata-description').style('display', function () {
-               return description.length > 0 ? 'flex' : 'none';
-             }).select('input').attr('value', description);
+       function uiInit(context) {
+         var _initCounter = 0;
+         var _needWidth = {};
 
-             _selection.select('.preset-wikidata-identifier').style('display', function () {
-               return entity.id ? 'flex' : 'none';
-             }).select('input').attr('value', entity.id);
-           }); // not a proper QID
+         var _lastPointerType;
 
-           function unrecognized() {
-             _wikidataEntity = null;
-             setLabelForEntity();
+         function render(container) {
+           container.on('click.ui', function (d3_event) {
+             // we're only concerned with the primary mouse button
+             if (d3_event.button !== 0) return;
+             if (!d3_event.composedPath) return; // some targets have default click events we don't want to override
 
-             _selection.select('.preset-wikidata-description').style('display', 'none');
+             var isOkayTarget = d3_event.composedPath().some(function (node) {
+               // we only care about element nodes
+               return node.nodeType === 1 && ( // clicking <input> focuses it and/or changes a value
+               node.nodeName === 'INPUT' || // clicking <label> affects its <input> by default
+               node.nodeName === 'LABEL' || // clicking <a> opens a hyperlink by default
+               node.nodeName === 'A');
+             });
+             if (isOkayTarget) return; // disable double-tap-to-zoom on touchscreens
 
-             _selection.select('.preset-wikidata-identifier').style('display', 'none');
+             d3_event.preventDefault();
+           });
+           var detected = utilDetect(); // only WebKit supports gesture events
 
-             _selection.select('button.wiki-link').classed('disabled', true);
+           if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
+           // but we only need to do this on desktop Safari anyway. – #7694
+           !detected.isMobileWebKit) {
+             // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
+             // CSS property, but on desktop Safari we need to manually cancel the
+             // default gesture events.
+             container.on('gesturestart.ui gesturechange.ui gestureend.ui', function (d3_event) {
+               // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
+               d3_event.preventDefault();
+             });
+           }
 
-             if (_qid && _qid !== '') {
-               _wikiURL = 'https://wikidata.org/wiki/Special:Search?search=' + _qid;
-             } else {
-               _wikiURL = '';
-             }
+           if ('PointerEvent' in window) {
+             select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
+               var pointerType = d3_event.pointerType || 'mouse';
+
+               if (_lastPointerType !== pointerType) {
+                 _lastPointerType = pointerType;
+                 container.attr('pointer', pointerType);
+               }
+             }, true);
+           } else {
+             _lastPointerType = 'mouse';
+             container.attr('pointer', 'mouse');
            }
-         };
 
-         function entityPropertyForDisplay(wikidataEntity, propKey) {
-           if (!wikidataEntity[propKey]) return '';
-           var propObj = wikidataEntity[propKey];
-           var langKeys = Object.keys(propObj);
-           if (langKeys.length === 0) return ''; // sorted by priority, since we want to show the user's language first if possible
+           container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
 
-           var langs = wikidata.languagesToQuery();
+           container.call(uiFullScreen(context));
+           var map = context.map();
+           map.redrawEnable(false); // don't draw until we've set zoom/lat/long
 
-           for (var i in langs) {
-             var lang = langs[i];
-             var valueObj = propObj[lang];
-             if (valueObj && valueObj.value && valueObj.value.length > 0) return valueObj.value;
-           } // default to any available value
+           map.on('hitMinZoom.ui', function () {
+             ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
+           });
+           container.append('svg').attr('id', 'ideditor-defs').call(ui.svgDefs);
+           container.append('div').attr('class', 'sidebar').call(ui.sidebar);
+           var content = container.append('div').attr('class', 'main-content active'); // Top toolbar
 
+           content.append('div').attr('class', 'top-toolbar-wrap').append('div').attr('class', 'top-toolbar fillD').call(uiTopToolbar(context));
+           content.append('div').attr('class', 'main-map').attr('dir', 'ltr').call(map);
+           var overMap = content.append('div').attr('class', 'over-map'); // HACK: Mobile Safari 14 likes to select anything selectable when long-
+           // pressing, even if it's not targeted. This conflicts with long-pressing
+           // to show the edit menu. We add a selectable offscreen element as the first
+           // child to trick Safari into not showing the selection UI.
 
-           return propObj[langKeys[0]].value;
-         }
+           overMap.append('div').attr('class', 'select-trap').text('t');
+           overMap.call(uiMapInMap(context)).call(uiNotice(context));
+           overMap.append('div').attr('class', 'spinner').call(uiSpinner(context)); // Map controls
 
-         wiki.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return wiki;
-         };
+           var controlsWrap = overMap.append('div').attr('class', 'map-controls-wrap');
+           var controls = controlsWrap.append('div').attr('class', 'map-controls');
+           controls.append('div').attr('class', 'map-control zoombuttons').call(uiZoom(context));
+           controls.append('div').attr('class', 'map-control zoom-to-selection-control').call(uiZoomToSelection(context));
+           controls.append('div').attr('class', 'map-control geolocate-control').call(uiGeolocate(context));
+           controlsWrap.on('wheel.mapControls', function (d3_event) {
+             if (!d3_event.deltaX) {
+               controlsWrap.node().scrollTop += d3_event.deltaY;
+             }
+           }); // Add panes
+           // This should happen after map is initialized, as some require surface()
 
-         wiki.focus = function () {
-           _searchInput.node().focus();
-         };
+           var panes = overMap.append('div').attr('class', 'map-panes');
+           var uiPanes = [uiPaneBackground(context), uiPaneMapData(context), uiPaneIssues(context), uiPanePreferences(context), uiPaneHelp(context)];
+           uiPanes.forEach(function (pane) {
+             controls.append('div').attr('class', 'map-control map-pane-control ' + pane.id + '-control').call(pane.renderToggleButton);
+             panes.call(pane.renderPane);
+           });
+           ui.info = uiInfo(context);
+           overMap.call(ui.info);
+           overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
+           .classed('hide', true).call(ui.photoviewer);
+           overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Add footer
 
-         return utilRebind(wiki, dispatch$1, 'on');
-       }
+           var about = content.append('div').attr('class', 'map-footer');
+           about.append('div').attr('class', 'api-status').call(uiStatus(context));
+           var footer = about.append('div').attr('class', 'map-footer-bar fillD');
+           footer.append('div').attr('class', 'flash-wrap footer-hide');
+           var footerWrap = footer.append('div').attr('class', 'main-footer-wrap footer-show');
+           footerWrap.append('div').attr('class', 'scale-block').call(uiScale(context));
+           var aboutList = footerWrap.append('div').attr('class', 'info-block').append('ul').attr('class', 'map-footer-list');
+           aboutList.append('li').attr('class', 'user-list').call(uiContributors(context));
+           var apiConnections = context.apiConnections();
 
-       function uiFieldWikipedia(field, context) {
-         var _arguments = arguments;
-         var dispatch$1 = dispatch('change');
-         var wikipedia = services.wikipedia;
-         var wikidata = services.wikidata;
+           if (apiConnections && apiConnections.length > 1) {
+             aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
+           }
 
-         var _langInput = select(null);
+           aboutList.append('li').attr('class', 'issues-info').call(uiIssuesInfo(context));
+           aboutList.append('li').attr('class', 'feature-warning').call(uiFeatureInfo(context));
+           var issueLinks = aboutList.append('li');
+           issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/issues').attr('aria-label', _t('report_a_bug')).call(svgIcon('#iD-icon-bug', 'light')).call(uiTooltip().title(_t.html('report_a_bug')).placement('top'));
+           issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating').attr('aria-label', _t('help_translate')).call(svgIcon('#iD-icon-translate', 'light')).call(uiTooltip().title(_t.html('help_translate')).placement('top'));
+           aboutList.append('li').attr('class', 'version').call(uiVersion(context));
 
-         var _titleInput = select(null);
+           if (!context.embed()) {
+             aboutList.call(uiAccount(context));
+           } // Setup map dimensions and move map to initial center/zoom.
+           // This should happen after .main-content and toolbars exist.
 
-         var _wikiURL = '';
 
-         var _entityIDs;
+           ui.onResize();
+           map.redrawEnable(true);
+           ui.hash = behaviorHash(context);
+           ui.hash();
 
-         var _tags;
+           if (!ui.hash.hadHash) {
+             map.centerZoom([0, 0], 2);
+           } // Bind events
 
-         var _dataWikipedia = [];
-         _mainFileFetcher.get('wmf_sitematrix').then(function (d) {
-           _dataWikipedia = d;
-           if (_tags) updateForTags(_tags);
-         })["catch"](function () {
-           /* ignore */
-         });
-         var langCombo = uiCombobox(context, 'wikipedia-lang').fetcher(function (value, callback) {
-           var v = value.toLowerCase();
-           callback(_dataWikipedia.filter(function (d) {
-             return d[0].toLowerCase().indexOf(v) >= 0 || d[1].toLowerCase().indexOf(v) >= 0 || d[2].toLowerCase().indexOf(v) >= 0;
-           }).map(function (d) {
-             return {
-               value: d[1]
-             };
-           }));
-         });
-         var titleCombo = uiCombobox(context, 'wikipedia-title').fetcher(function (value, callback) {
-           if (!value) {
-             value = '';
 
-             for (var i in _entityIDs) {
-               var entity = context.hasEntity(_entityIDs[i]);
+           window.onbeforeunload = function () {
+             return context.save();
+           };
 
-               if (entity.tags.name) {
-                 value = entity.tags.name;
-                 break;
-               }
-             }
-           }
+           window.onunload = function () {
+             context.history().unlock();
+           };
 
-           var searchfn = value.length > 7 ? wikipedia.search : wikipedia.suggestions;
-           searchfn(language()[2], value, function (query, data) {
-             callback(data.map(function (d) {
-               return {
-                 value: d
-               };
-             }));
+           select(window).on('resize.editor', function () {
+             ui.onResize();
            });
-         });
+           var panPixels = 80;
+           context.keybinding().on('⌫', function (d3_event) {
+             d3_event.preventDefault();
+           }).on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle) // #5663, #6864 - common QWERTY, AZERTY
+           .on('←', pan([panPixels, 0])).on('↑', pan([0, panPixels])).on('→', pan([-panPixels, 0])).on('↓', pan([0, -panPixels])).on(uiCmd('⌥←'), pan([map.dimensions()[0], 0])).on(uiCmd('⌥↑'), pan([0, map.dimensions()[1]])).on(uiCmd('⌥→'), pan([-map.dimensions()[0], 0])).on(uiCmd('⌥↓'), pan([0, -map.dimensions()[1]])).on(uiCmd('⌘' + _t('background.key')), function quickSwitch(d3_event) {
+             if (d3_event) {
+               d3_event.stopImmediatePropagation();
+               d3_event.preventDefault();
+             }
 
-         function wiki(selection) {
-           var wrap = selection.selectAll('.form-field-input-wrap').data([0]);
-           wrap = wrap.enter().append('div').attr('class', "form-field-input-wrap form-field-input-".concat(field.type)).merge(wrap);
-           var langContainer = wrap.selectAll('.wiki-lang-container').data([0]);
-           langContainer = langContainer.enter().append('div').attr('class', 'wiki-lang-container').merge(langContainer);
-           _langInput = langContainer.selectAll('input.wiki-lang').data([0]);
-           _langInput = _langInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-lang').attr('placeholder', _t('translate.localized_translation_language')).call(utilNoAuto).call(langCombo).merge(_langInput);
+             var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
 
-           _langInput.on('blur', changeLang).on('change', changeLang);
+             if (previousBackground) {
+               var currentBackground = context.background().baseLayerSource();
+               corePreferences('background-last-used-toggle', currentBackground.id);
+               corePreferences('background-last-used', previousBackground.id);
+               context.background().baseLayerSource(previousBackground);
+             }
+           }).on(_t('area_fill.wireframe.key'), function toggleWireframe(d3_event) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation();
+             context.map().toggleWireframe();
+           }).on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData(d3_event) {
+             d3_event.preventDefault();
+             d3_event.stopPropagation(); // Don't allow layer changes while drawing - #6584
 
-           var titleContainer = wrap.selectAll('.wiki-title-container').data([0]);
-           titleContainer = titleContainer.enter().append('div').attr('class', 'wiki-title-container').merge(titleContainer);
-           _titleInput = titleContainer.selectAll('input.wiki-title').data([0]);
-           _titleInput = _titleInput.enter().append('input').attr('type', 'text').attr('class', 'wiki-title').attr('id', field.domId).call(utilNoAuto).call(titleCombo).merge(_titleInput);
+             var mode = context.mode();
+             if (mode && /^draw/.test(mode.id)) return;
+             var layer = context.layers().layer('osm');
 
-           _titleInput.on('blur', function () {
-             change(true);
-           }).on('change', function () {
-             change(false);
-           });
+             if (layer) {
+               layer.enabled(!layer.enabled());
 
-           var link = titleContainer.selectAll('.wiki-link').data([0]);
-           link = link.enter().append('button').attr('class', 'form-field-button wiki-link').attr('title', _t('icons.view_on', {
-             domain: 'wikipedia.org'
-           })).call(svgIcon('#iD-icon-out-link')).merge(link);
-           link.on('click', function (d3_event) {
+               if (!layer.enabled()) {
+                 context.enter(modeBrowse(context));
+               }
+             }
+           }).on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited(d3_event) {
              d3_event.preventDefault();
-             if (_wikiURL) window.open(_wikiURL, '_blank');
+             context.map().toggleHighlightEdited();
            });
-         }
-
-         function defaultLanguageInfo(skipEnglishFallback) {
-           var langCode = _mainLocalizer.languageCode().toLowerCase();
-
-           for (var i in _dataWikipedia) {
-             var d = _dataWikipedia[i]; // default to the language of iD's current locale
-
-             if (d[2] === langCode) return d;
-           } // fallback to English
-
+           context.on('enter.editor', function (entered) {
+             container.classed('mode-' + entered.id, true);
+           }).on('exit.editor', function (exited) {
+             container.classed('mode-' + exited.id, false);
+           });
+           context.enter(modeBrowse(context));
 
-           return skipEnglishFallback ? ['', '', ''] : ['English', 'English', 'en'];
-         }
+           if (!_initCounter++) {
+             if (!ui.hash.startWalkthrough) {
+               context.container().call(uiSplash(context)).call(uiRestore(context));
+             }
 
-         function language(skipEnglishFallback) {
-           var value = utilGetSetValue(_langInput).toLowerCase();
+             context.container().call(ui.shortcuts);
+           }
 
-           for (var i in _dataWikipedia) {
-             var d = _dataWikipedia[i]; // return the language already set in the UI, if supported
+           var osm = context.connection();
+           var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
 
-             if (d[0].toLowerCase() === value || d[1].toLowerCase() === value || d[2] === value) return d;
-           } // fallback to English
+           if (osm && auth) {
+             osm.on('authLoading.ui', function () {
+               context.container().call(auth);
+             }).on('authDone.ui', function () {
+               auth.close();
+             });
+           }
 
+           _initCounter++;
 
-           return defaultLanguageInfo(skipEnglishFallback);
-         }
+           if (ui.hash.startWalkthrough) {
+             ui.hash.startWalkthrough = false;
+             context.container().call(uiIntro(context));
+           }
 
-         function changeLang() {
-           utilGetSetValue(_langInput, language()[1]);
-           change(true);
+           function pan(d) {
+             return function (d3_event) {
+               if (d3_event.shiftKey) return;
+               if (context.container().select('.combobox').size()) return;
+               d3_event.preventDefault();
+               context.map().pan(d, 100);
+             };
+           }
          }
 
-         function change(skipWikidata) {
-           var value = utilGetSetValue(_titleInput);
-           var m = value.match(/https?:\/\/([-a-z]+)\.wikipedia\.org\/(?:wiki|\1-[-a-z]+)\/([^#]+)(?:#(.+))?/);
-
-           var langInfo = m && _dataWikipedia.find(function (d) {
-             return m[1] === d[2];
-           });
-
-           var syncTags = {};
-
-           if (langInfo) {
-             var nativeLangName = langInfo[1]; // Normalize title http://www.mediawiki.org/wiki/API:Query#Title_normalization
-
-             value = decodeURIComponent(m[2]).replace(/_/g, ' ');
-
-             if (m[3]) {
-               var anchor; // try {
-               // leave this out for now - #6232
-               // Best-effort `anchordecode:` implementation
-               // anchor = decodeURIComponent(m[3].replace(/\.([0-9A-F]{2})/g, '%$1'));
-               // } catch (e) {
-
-               anchor = decodeURIComponent(m[3]); // }
+         var ui = {};
 
-               value += '#' + anchor.replace(/_/g, ' ');
-             }
+         var _loadPromise; // renders the iD interface into the container node
 
-             value = value.slice(0, 1).toUpperCase() + value.slice(1);
-             utilGetSetValue(_langInput, nativeLangName);
-             utilGetSetValue(_titleInput, value);
-           }
 
-           if (value) {
-             syncTags.wikipedia = context.cleanTagValue(language()[2] + ':' + value);
-           } else {
-             syncTags.wikipedia = undefined;
-           }
+         ui.ensureLoaded = function () {
+           if (_loadPromise) return _loadPromise;
+           return _loadPromise = Promise.all([// must have strings and presets before loading the UI
+           _mainLocalizer.ensureLoaded(), _mainPresetIndex.ensureLoaded()]).then(function () {
+             if (!context.container().empty()) render(context.container());
+           })["catch"](function (err) {
+             return console.error(err);
+           }); // eslint-disable-line
+         }; // `ui.restart()` will destroy and rebuild the entire iD interface,
+         // for example to switch the locale while iD is running.
 
-           dispatch$1.call('change', this, syncTags);
-           if (skipWikidata || !value || !language()[2]) return; // attempt asynchronous update of wikidata tag..
 
-           var initGraph = context.graph();
-           var initEntityIDs = _entityIDs;
-           wikidata.itemsByTitle(language()[2], value, function (err, data) {
-             if (err || !data || !Object.keys(data).length) return; // If graph has changed, we can't apply this update.
+         ui.restart = function () {
+           context.keybinding().clear();
+           _loadPromise = null;
+           context.container().selectAll('*').remove();
+           ui.ensureLoaded();
+         };
 
-             if (context.graph() !== initGraph) return;
-             var qids = Object.keys(data);
-             var value = qids && qids.find(function (id) {
-               return id.match(/^Q\d+$/);
-             });
-             var actions = initEntityIDs.map(function (entityID) {
-               var entity = context.entity(entityID).tags;
-               var currTags = Object.assign({}, entity); // shallow copy
+         ui.lastPointerType = function () {
+           return _lastPointerType;
+         };
 
-               if (currTags.wikidata !== value) {
-                 currTags.wikidata = value;
-                 return actionChangeTags(entityID, currTags);
-               }
+         ui.svgDefs = svgDefs(context);
+         ui.flash = uiFlash(context);
+         ui.sidebar = uiSidebar(context);
+         ui.photoviewer = uiPhotoviewer(context);
+         ui.shortcuts = uiShortcuts(context);
 
-               return null;
-             }).filter(Boolean);
-             if (!actions.length) return; // Coalesce the update of wikidata tag into the previous tag change
+         ui.onResize = function (withPan) {
+           var map = context.map(); // Recalc dimensions of map and sidebar.. (`true` = force recalc)
+           // This will call `getBoundingClientRect` and trigger reflow,
+           //  but the values will be cached for later use.
 
-             context.overwrite(function actionUpdateWikidataTags(graph) {
-               actions.forEach(function (action) {
-                 graph = action(graph);
-               });
-               return graph;
-             }, context.history().undoAnnotation()); // do not dispatch.call('change') here, because entity_editor
-             // changeTags() is not intended to be called asynchronously
-           });
-         }
+           var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
+           utilGetDimensions(context.container().select('.sidebar'), true);
 
-         wiki.tags = function (tags) {
-           _tags = tags;
-           updateForTags(tags);
-         };
+           if (withPan !== undefined) {
+             map.redrawEnable(false);
+             map.pan(withPan);
+             map.redrawEnable(true);
+           }
 
-         function updateForTags(tags) {
-           var value = typeof tags[field.key] === 'string' ? tags[field.key] : ''; // Expect tag format of `tagLang:tagArticleTitle`, e.g. `fr:Paris`, with
-           // optional suffix of `#anchor`
+           map.dimensions(mapDimensions);
+           ui.photoviewer.onMapResize(); // check if header or footer have overflowed
 
-           var m = value.match(/([^:]+):([^#]+)(?:#(.+))?/);
-           var tagLang = m && m[1];
-           var tagArticleTitle = m && m[2];
-           var anchor = m && m[3];
+           ui.checkOverflow('.top-toolbar');
+           ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
 
-           var tagLangInfo = tagLang && _dataWikipedia.find(function (d) {
-             return tagLang === d[2];
-           }); // value in correct format
+           var resizeWindowEvent = document.createEvent('Event');
+           resizeWindowEvent.initEvent('resizeWindow', true, true);
+           document.dispatchEvent(resizeWindowEvent);
+         }; // Call checkOverflow when resizing or whenever the contents change.
 
 
-           if (tagLangInfo) {
-             var nativeLangName = tagLangInfo[1];
-             utilGetSetValue(_langInput, nativeLangName);
-             utilGetSetValue(_titleInput, tagArticleTitle + (anchor ? '#' + anchor : ''));
+         ui.checkOverflow = function (selector, reset) {
+           if (reset) {
+             delete _needWidth[selector];
+           }
 
-             if (anchor) {
-               try {
-                 // Best-effort `anchorencode:` implementation
-                 anchor = encodeURIComponent(anchor.replace(/ /g, '_')).replace(/%/g, '.');
-               } catch (e) {
-                 anchor = anchor.replace(/ /g, '_');
-               }
+           var selection = context.container().select(selector);
+           if (selection.empty()) return;
+           var scrollWidth = selection.property('scrollWidth');
+           var clientWidth = selection.property('clientWidth');
+           var needed = _needWidth[selector] || scrollWidth;
+
+           if (scrollWidth > clientWidth) {
+             // overflow happening
+             selection.classed('narrow', true);
+
+             if (!_needWidth[selector]) {
+               _needWidth[selector] = scrollWidth;
              }
+           } else if (scrollWidth >= needed) {
+             selection.classed('narrow', false);
+           }
+         };
 
-             _wikiURL = 'https://' + tagLang + '.wikipedia.org/wiki/' + tagArticleTitle.replace(/ /g, '_') + (anchor ? '#' + anchor : ''); // unrecognized value format
-           } else {
-             utilGetSetValue(_titleInput, value);
+         ui.togglePanes = function (showPane) {
+           var hidePanes = context.container().selectAll('.map-pane.shown');
+           var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
+           hidePanes.classed('shown', false).classed('hide', true);
+           context.container().selectAll('.map-pane-control button').classed('active', false);
 
-             if (value && value !== '') {
-               utilGetSetValue(_langInput, '');
-               var defaultLangInfo = defaultLanguageInfo();
-               _wikiURL = "https://".concat(defaultLangInfo[2], ".wikipedia.org/w/index.php?fulltext=1&search=").concat(value);
+           if (showPane) {
+             hidePanes.classed('shown', false).classed('hide', true).style(side, '-500px');
+             context.container().selectAll('.' + showPane.attr('pane') + '-control button').classed('active', true);
+             showPane.classed('shown', true).classed('hide', false);
+
+             if (hidePanes.empty()) {
+               showPane.style(side, '-500px').transition().duration(200).style(side, '0px');
              } else {
-               var shownOrDefaultLangInfo = language(true
-               /* skipEnglishFallback */
-               );
-               utilGetSetValue(_langInput, shownOrDefaultLangInfo[1]);
-               _wikiURL = '';
+               showPane.style(side, '0px');
              }
+           } else {
+             hidePanes.classed('shown', true).classed('hide', false).style(side, '0px').transition().duration(200).style(side, '-500px').on('end', function () {
+               select(this).classed('shown', false).classed('hide', true);
+             });
            }
-         }
-
-         wiki.entityIDs = function (val) {
-           if (!_arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return wiki;
          };
 
-         wiki.focus = function () {
-           _titleInput.node().focus();
+         var _editMenu = uiEditMenu(context);
+
+         ui.editMenu = function () {
+           return _editMenu;
          };
 
-         return utilRebind(wiki, dispatch$1, 'on');
-       }
-       uiFieldWikipedia.supportsMultiselection = false;
+         ui.showEditMenu = function (anchorPoint, triggerType, operations) {
+           // remove any displayed menu
+           ui.closeEditMenu();
+           if (!operations && context.mode().operations) operations = context.mode().operations();
+           if (!operations || !operations.length) return; // disable menu if in wide selection, for example
 
-       var uiFields = {
-         access: uiFieldAccess,
-         address: uiFieldAddress,
-         check: uiFieldCheck,
-         combo: uiFieldCombo,
-         cycleway: uiFieldCycleway,
-         defaultCheck: uiFieldCheck,
-         email: uiFieldText,
-         identifier: uiFieldText,
-         lanes: uiFieldLanes,
-         localized: uiFieldLocalized,
-         maxspeed: uiFieldMaxspeed,
-         manyCombo: uiFieldCombo,
-         multiCombo: uiFieldCombo,
-         networkCombo: uiFieldCombo,
-         number: uiFieldText,
-         onewayCheck: uiFieldCheck,
-         radio: uiFieldRadio,
-         restrictions: uiFieldRestrictions,
-         semiCombo: uiFieldCombo,
-         structureRadio: uiFieldRadio,
-         tel: uiFieldText,
-         text: uiFieldText,
-         textarea: uiFieldTextarea,
-         typeCombo: uiFieldCombo,
-         url: uiFieldText,
-         wikidata: uiFieldWikidata,
-         wikipedia: uiFieldWikipedia
-       };
+           if (!context.map().editableDataEnabled()) return;
+           var surfaceNode = context.surface().node();
 
-       function uiField(context, presetField, entityIDs, options) {
-         options = Object.assign({
-           show: true,
-           wrap: true,
-           remove: true,
-           revert: true,
-           info: true
-         }, options);
-         var dispatch$1 = dispatch('change', 'revert');
-         var field = Object.assign({}, presetField); // shallow copy
+           if (surfaceNode.focus) {
+             // FF doesn't support it
+             // focus the surface or else clicking off the menu may not trigger modeBrowse
+             surfaceNode.focus();
+           }
 
-         field.domId = utilUniqueDomId('form-field-' + field.safeid);
-         var _show = options.show;
-         var _state = '';
-         var _tags = {};
-         var _locked = false;
+           operations.forEach(function (operation) {
+             if (operation.point) operation.point(anchorPoint);
+           });
 
-         var _lockedTip = uiTooltip().title(_t.html('inspector.lock.suggestion', {
-           label: field.label
-         })).placement('bottom');
+           _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
 
-         field.keys = field.keys || [field.key]; // only create the fields that are actually being shown
 
-         if (_show && !field.impl) {
-           createField();
-         } // Creates the field.. This is done lazily,
-         // once we know that the field will be shown.
+           context.map().supersurface.call(_editMenu);
+         };
 
+         ui.closeEditMenu = function () {
+           // remove any existing menu no matter how it was added
+           context.map().supersurface.select('.edit-menu').remove();
+         };
 
-         function createField() {
-           field.impl = uiFields[field.type](field, context).on('change', function (t, onInput) {
-             dispatch$1.call('change', field, t, onInput);
-           });
+         var _saveLoading = select(null);
 
-           if (entityIDs) {
-             field.entityIDs = entityIDs; // if this field cares about the entities, pass them along
+         context.uploader().on('saveStarted.ui', function () {
+           _saveLoading = uiLoading(context).message(_t.html('save.uploading')).blocking(true);
+           context.container().call(_saveLoading); // block input during upload
+         }).on('saveEnded.ui', function () {
+           _saveLoading.close();
 
-             if (field.impl.entityIDs) {
-               field.impl.entityIDs(entityIDs);
-             }
-           }
-         }
+           _saveLoading = select(null);
+         });
+         return ui;
+       }
 
-         function isModified() {
-           if (!entityIDs || !entityIDs.length) return false;
-           return entityIDs.some(function (entityID) {
-             var original = context.graph().base().entities[entityID];
-             var latest = context.graph().entity(entityID);
-             return field.keys.some(function (key) {
-               return original ? latest.tags[key] !== original.tags[key] : latest.tags[key];
-             });
-           });
-         }
+       function coreContext() {
+         var _this = this;
 
-         function tagsContainFieldKey() {
-           return field.keys.some(function (key) {
-             if (field.type === 'multiCombo') {
-               for (var tagKey in _tags) {
-                 if (tagKey.indexOf(key) === 0) {
-                   return true;
-                 }
-               }
+         var dispatch = dispatch$8('enter', 'exit', 'change');
+         var context = utilRebind({}, dispatch, 'on');
 
-               return false;
-             }
+         var _deferred = new Set();
 
-             return _tags[key] !== undefined;
-           });
-         }
+         context.version = '2.20.3';
+         context.privacyVersion = '20201202'; // iD will alter the hash so cache the parameters intended to setup the session
 
-         function revert(d3_event, d) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-           if (!entityIDs || _locked) return;
-           dispatch$1.call('revert', d, d.keys);
-         }
+         context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
+         /* Changeset */
+         // An osmChangeset object. Not loaded until needed.
 
-         function remove(d3_event, d) {
-           d3_event.stopPropagation();
-           d3_event.preventDefault();
-           if (_locked) return;
-           var t = {};
-           d.keys.forEach(function (key) {
-             t[key] = undefined;
-           });
-           dispatch$1.call('change', d, t);
-         }
+         context.changeset = null;
+         var _defaultChangesetComment = context.initialHashParams.comment;
+         var _defaultChangesetSource = context.initialHashParams.source;
+         var _defaultChangesetHashtags = context.initialHashParams.hashtags;
 
-         field.render = function (selection) {
-           var container = selection.selectAll('.form-field').data([field]); // Enter
+         context.defaultChangesetComment = function (val) {
+           if (!arguments.length) return _defaultChangesetComment;
+           _defaultChangesetComment = val;
+           return context;
+         };
 
-           var enter = container.enter().append('div').attr('class', function (d) {
-             return 'form-field form-field-' + d.safeid;
-           }).classed('nowrap', !options.wrap);
+         context.defaultChangesetSource = function (val) {
+           if (!arguments.length) return _defaultChangesetSource;
+           _defaultChangesetSource = val;
+           return context;
+         };
 
-           if (options.wrap) {
-             var labelEnter = enter.append('label').attr('class', 'field-label').attr('for', function (d) {
-               return d.domId;
-             });
-             var textEnter = labelEnter.append('span').attr('class', 'label-text');
-             textEnter.append('span').attr('class', 'label-textvalue').html(function (d) {
-               return d.label();
-             });
-             textEnter.append('span').attr('class', 'label-textannotation');
+         context.defaultChangesetHashtags = function (val) {
+           if (!arguments.length) return _defaultChangesetHashtags;
+           _defaultChangesetHashtags = val;
+           return context;
+         };
+         /* Document title */
 
-             if (options.remove) {
-               labelEnter.append('button').attr('class', 'remove-icon').attr('title', _t('icons.remove')).call(svgIcon('#iD-operation-delete'));
-             }
+         /* (typically shown as the label for the browser window/tab) */
+         // If true, iD will update the title based on what the user is doing
 
-             if (options.revert) {
-               labelEnter.append('button').attr('class', 'modified-icon').attr('title', _t('icons.undo')).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-redo' : '#iD-icon-undo'));
-             }
-           } // Update
 
+         var _setsDocumentTitle = true;
 
-           container = container.merge(enter);
-           container.select('.field-label > .remove-icon') // propagate bound data
-           .on('click', remove);
-           container.select('.field-label > .modified-icon') // propagate bound data
-           .on('click', revert);
-           container.each(function (d) {
-             var selection = select(this);
+         context.setsDocumentTitle = function (val) {
+           if (!arguments.length) return _setsDocumentTitle;
+           _setsDocumentTitle = val;
+           return context;
+         }; // The part of the title that is always the same
 
-             if (!d.impl) {
-               createField();
-             }
 
-             var reference, help; // instantiate field help
+         var _documentTitleBase = document.title;
 
-             if (options.wrap && field.type === 'restrictions') {
-               help = uiFieldHelp(context, 'restrictions');
-             } // instantiate tag reference
+         context.documentTitleBase = function (val) {
+           if (!arguments.length) return _documentTitleBase;
+           _documentTitleBase = val;
+           return context;
+         };
+         /* User interface and keybinding */
 
 
-             if (options.wrap && options.info) {
-               var referenceKey = d.key || '';
+         var _ui;
 
-               if (d.type === 'multiCombo') {
-                 // lookup key without the trailing ':'
-                 referenceKey = referenceKey.replace(/:$/, '');
-               }
+         context.ui = function () {
+           return _ui;
+         };
 
-               reference = uiTagReference(d.reference || {
-                 key: referenceKey
-               });
+         context.lastPointerType = function () {
+           return _ui.lastPointerType();
+         };
 
-               if (_state === 'hover') {
-                 reference.showing(false);
-               }
-             }
+         var _keybinding = utilKeybinding('context');
 
-             selection.call(d.impl); // add field help components
+         context.keybinding = function () {
+           return _keybinding;
+         };
 
-             if (help) {
-               selection.call(help.body).select('.field-label').call(help.button);
-             } // add tag reference components
+         select(document).call(_keybinding);
+         /* Straight accessors. Avoid using these if you can. */
+         // Instantiate the connection here because it doesn't require passing in
+         // `context` and it's needed for pre-init calls like `preauth`
 
+         var _connection = services.osm;
 
-             if (reference) {
-               selection.call(reference.body).select('.field-label').call(reference.button);
-             }
+         var _history;
 
-             d.impl.tags(_tags);
-           });
-           container.classed('locked', _locked).classed('modified', isModified()).classed('present', tagsContainFieldKey()); // show a tip and lock icon if the field is locked
+         var _validator;
 
-           var annotation = container.selectAll('.field-label .label-textannotation');
-           var icon = annotation.selectAll('.icon').data(_locked ? [0] : []);
-           icon.exit().remove();
-           icon.enter().append('svg').attr('class', 'icon').append('use').attr('xlink:href', '#fas-lock');
-           container.call(_locked ? _lockedTip : _lockedTip.destroy);
+         var _uploader;
+
+         context.connection = function () {
+           return _connection;
          };
 
-         field.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return field;
+         context.history = function () {
+           return _history;
          };
 
-         field.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val;
+         context.validator = function () {
+           return _validator;
+         };
 
-           if (tagsContainFieldKey() && !_show) {
-             // always show a field if it has a value to display
-             _show = true;
+         context.uploader = function () {
+           return _uploader;
+         };
+         /* Connection */
 
-             if (!field.impl) {
-               createField();
-             }
+
+         context.preauth = function (options) {
+           if (_connection) {
+             _connection["switch"](options);
            }
 
-           return field;
+           return context;
          };
+         /* connection options for source switcher (optional) */
 
-         field.locked = function (val) {
-           if (!arguments.length) return _locked;
-           _locked = val;
-           return field;
-         };
 
-         field.show = function () {
-           _show = true;
+         var _apiConnections;
 
-           if (!field.impl) {
-             createField();
-           }
+         context.apiConnections = function (val) {
+           if (!arguments.length) return _apiConnections;
+           _apiConnections = val;
+           return context;
+         }; // A string or array or locale codes to prefer over the browser's settings
 
-           if (field["default"] && field.key && _tags[field.key] !== field["default"]) {
-             var t = {};
-             t[field.key] = field["default"];
-             dispatch$1.call('change', this, t);
-           }
-         }; // A shown field has a visible UI, a non-shown field is in the 'Add field' dropdown
 
+         context.locale = function (locale) {
+           if (!arguments.length) return _mainLocalizer.localeCode();
+           _mainLocalizer.preferredLocaleCodes(locale);
+           return context;
+         };
 
-         field.isShown = function () {
-           return _show;
-         }; // An allowed field can appear in the UI or in the 'Add field' dropdown.
-         // A non-allowed field is hidden from the user altogether
+         function afterLoad(cid, callback) {
+           return function (err, result) {
+             if (err) {
+               // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+               if (err.status === 400 || err.status === 401 || err.status === 403) {
+                 if (_connection) {
+                   _connection.logout();
+                 }
+               }
 
+               if (typeof callback === 'function') {
+                 callback(err);
+               }
 
-         field.isAllowed = function () {
-           if (entityIDs && entityIDs.length > 1 && uiFields[field.type].supportsMultiselection === false) return false;
-           if (field.geometry && !entityIDs.every(function (entityID) {
-             return field.matchGeometry(context.graph().geometry(entityID));
-           })) return false;
+               return;
+             } else if (_connection && _connection.getConnectionId() !== cid) {
+               if (typeof callback === 'function') {
+                 callback({
+                   message: 'Connection Switched',
+                   status: -1
+                 });
+               }
 
-           if (field.countryCodes || field.notCountryCodes) {
-             var extent = combinedEntityExtent();
-             if (!extent) return true;
-             var center = extent.center();
-             var countryCode = iso1A2Code(center);
-             if (!countryCode) return false;
-             countryCode = countryCode.toLowerCase();
+               return;
+             } else {
+               _history.merge(result.data, result.extent);
 
-             if (field.countryCodes && field.countryCodes.indexOf(countryCode) === -1) {
-               return false;
+               if (typeof callback === 'function') {
+                 callback(err, result);
+               }
+
+               return;
              }
+           };
+         }
 
-             if (field.notCountryCodes && field.notCountryCodes.indexOf(countryCode) !== -1) {
-               return false;
+         context.loadTiles = function (projection, callback) {
+           var handle = window.requestIdleCallback(function () {
+             _deferred["delete"](handle);
+
+             if (_connection && context.editableDataEnabled()) {
+               var cid = _connection.getConnectionId();
+
+               _connection.loadTiles(projection, afterLoad(cid, callback));
              }
-           }
+           });
 
-           var prerequisiteTag = field.prerequisiteTag;
+           _deferred.add(handle);
+         };
 
-           if (entityIDs && !tagsContainFieldKey() && // ignore tagging prerequisites if a value is already present
-           prerequisiteTag) {
-             if (!entityIDs.every(function (entityID) {
-               var entity = context.graph().entity(entityID);
+         context.loadTileAtLoc = function (loc, callback) {
+           var handle = window.requestIdleCallback(function () {
+             _deferred["delete"](handle);
 
-               if (prerequisiteTag.key) {
-                 var value = entity.tags[prerequisiteTag.key];
-                 if (!value) return false;
+             if (_connection && context.editableDataEnabled()) {
+               var cid = _connection.getConnectionId();
 
-                 if (prerequisiteTag.valueNot) {
-                   return prerequisiteTag.valueNot !== value;
-                 }
+               _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
+             }
+           });
 
-                 if (prerequisiteTag.value) {
-                   return prerequisiteTag.value === value;
-                 }
-               } else if (prerequisiteTag.keyNot) {
-                 if (entity.tags[prerequisiteTag.keyNot]) return false;
-               }
+           _deferred.add(handle);
+         }; // Download the full entity and its parent relations. The callback may be called multiple times.
 
-               return true;
-             })) return false;
-           }
 
-           return true;
-         };
+         context.loadEntity = function (entityID, callback) {
+           if (_connection) {
+             var cid = _connection.getConnectionId();
 
-         field.focus = function () {
-           if (field.impl) {
-             field.impl.focus();
-           }
-         };
+             _connection.loadEntity(entityID, afterLoad(cid, callback)); // We need to fetch the parent relations separately.
 
-         function combinedEntityExtent() {
-           return entityIDs && entityIDs.length && entityIDs.reduce(function (extent, entityID) {
-             var entity = context.graph().entity(entityID);
-             return extent.extend(entity.extent(context.graph()));
-           }, geoExtent());
-         }
 
-         return utilRebind(field, dispatch$1, 'on');
-       }
+             _connection.loadEntityRelations(entityID, afterLoad(cid, callback));
+           }
+         };
+
+         context.zoomToEntity = function (entityID, zoomTo) {
+           // be sure to load the entity even if we're not going to zoom to it
+           context.loadEntity(entityID, function (err, result) {
+             if (err) return;
 
-       function uiFormFields(context) {
-         var moreCombo = uiCombobox(context, 'more-fields').minItems(1);
-         var _fieldsArr = [];
-         var _lastPlaceholder = '';
-         var _state = '';
-         var _klass = '';
+             if (zoomTo !== false) {
+               var entity = result.data.find(function (e) {
+                 return e.id === entityID;
+               });
 
-         function formFields(selection) {
-           var allowedFields = _fieldsArr.filter(function (field) {
-             return field.isAllowed();
+               if (entity) {
+                 _map.zoomTo(entity);
+               }
+             }
            });
 
-           var shown = allowedFields.filter(function (field) {
-             return field.isShown();
-           });
-           var notShown = allowedFields.filter(function (field) {
-             return !field.isShown();
-           });
-           var container = selection.selectAll('.form-fields-container').data([0]);
-           container = container.enter().append('div').attr('class', 'form-fields-container ' + (_klass || '')).merge(container);
-           var fields = container.selectAll('.wrap-form-field').data(shown, function (d) {
-             return d.id + (d.entityIDs ? d.entityIDs.join() : '');
-           });
-           fields.exit().remove(); // Enter
+           _map.on('drawn.zoomToEntity', function () {
+             if (!context.hasEntity(entityID)) return;
 
-           var enter = fields.enter().append('div').attr('class', function (d) {
-             return 'wrap-form-field wrap-form-field-' + d.safeid;
-           }); // Update
+             _map.on('drawn.zoomToEntity', null);
 
-           fields = fields.merge(enter);
-           fields.order().each(function (d) {
-             select(this).call(d.render);
+             context.on('enter.zoomToEntity', null);
+             context.enter(modeSelect(context, [entityID]));
            });
-           var titles = [];
-           var moreFields = notShown.map(function (field) {
-             var title = field.title();
-             titles.push(title);
-             var terms = field.terms();
-             if (field.key) terms.push(field.key);
-             if (field.keys) terms = terms.concat(field.keys);
-             return {
-               display: field.label(),
-               value: title,
-               title: title,
-               field: field,
-               terms: terms
-             };
+
+           context.on('enter.zoomToEntity', function () {
+             if (_mode.id !== 'browse') {
+               _map.on('drawn.zoomToEntity', null);
+
+               context.on('enter.zoomToEntity', null);
+             }
            });
-           var placeholder = titles.slice(0, 3).join(', ') + (titles.length > 3 ? '…' : '');
-           var more = selection.selectAll('.more-fields').data(_state === 'hover' || moreFields.length === 0 ? [] : [0]);
-           more.exit().remove();
-           var moreEnter = more.enter().append('div').attr('class', 'more-fields').append('label');
-           moreEnter.append('span').html(_t.html('inspector.add_fields'));
-           more = moreEnter.merge(more);
-           var input = more.selectAll('.value').data([0]);
-           input.exit().remove();
-           input = input.enter().append('input').attr('class', 'value').attr('type', 'text').attr('placeholder', placeholder).call(utilNoAuto).merge(input);
-           input.call(utilGetSetValue, '').call(moreCombo.data(moreFields).on('accept', function (d) {
-             if (!d) return; // user entered something that was not matched
+         };
 
-             var field = d.field;
-             field.show();
-             selection.call(formFields); // rerender
+         var _minEditableZoom = 16;
 
-             field.focus();
-           })); // avoid updating placeholder excessively (triggers style recalc)
+         context.minEditableZoom = function (val) {
+           if (!arguments.length) return _minEditableZoom;
+           _minEditableZoom = val;
 
-           if (_lastPlaceholder !== placeholder) {
-             input.attr('placeholder', placeholder);
-             _lastPlaceholder = placeholder;
+           if (_connection) {
+             _connection.tileZoom(val);
            }
-         }
 
-         formFields.fieldsArr = function (val) {
-           if (!arguments.length) return _fieldsArr;
-           _fieldsArr = val || [];
-           return formFields;
+           return context;
+         }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
+
+
+         context.maxCharsForTagKey = function () {
+           return 255;
          };
 
-         formFields.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return formFields;
+         context.maxCharsForTagValue = function () {
+           return 255;
          };
 
-         formFields.klass = function (val) {
-           if (!arguments.length) return _klass;
-           _klass = val;
-           return formFields;
+         context.maxCharsForRelationRole = function () {
+           return 255;
          };
 
-         return formFields;
-       }
+         function cleanOsmString(val, maxChars) {
+           // be lenient with input
+           if (val === undefined || val === null) {
+             val = '';
+           } else {
+             val = val.toString();
+           } // remove whitespace
 
-       function uiSectionPresetFields(context) {
-         var section = uiSection('preset-fields', context).label(_t.html('inspector.fields')).disclosureContent(renderDisclosureContent);
-         var dispatch$1 = dispatch('change', 'revert');
-         var formFields = uiFormFields(context);
 
-         var _state;
+           val = val.trim(); // use the canonical form of the string
 
-         var _fieldsArr;
+           if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
 
-         var _presets = [];
+           return utilUnicodeCharsTruncated(val, maxChars);
+         }
 
-         var _tags;
+         context.cleanTagKey = function (val) {
+           return cleanOsmString(val, context.maxCharsForTagKey());
+         };
 
-         var _entityIDs;
+         context.cleanTagValue = function (val) {
+           return cleanOsmString(val, context.maxCharsForTagValue());
+         };
 
-         function renderDisclosureContent(selection) {
-           if (!_fieldsArr) {
-             var graph = context.graph();
-             var geometries = Object.keys(_entityIDs.reduce(function (geoms, entityID) {
-               geoms[graph.entity(entityID).geometry(graph)] = true;
-               return geoms;
-             }, {}));
-             var presetsManager = _mainPresetIndex;
-             var allFields = [];
-             var allMoreFields = [];
-             var sharedTotalFields;
+         context.cleanRelationRole = function (val) {
+           return cleanOsmString(val, context.maxCharsForRelationRole());
+         };
+         /* History */
 
-             _presets.forEach(function (preset) {
-               var fields = preset.fields();
-               var moreFields = preset.moreFields();
-               allFields = utilArrayUnion(allFields, fields);
-               allMoreFields = utilArrayUnion(allMoreFields, moreFields);
 
-               if (!sharedTotalFields) {
-                 sharedTotalFields = utilArrayUnion(fields, moreFields);
-               } else {
-                 sharedTotalFields = sharedTotalFields.filter(function (field) {
-                   return fields.indexOf(field) !== -1 || moreFields.indexOf(field) !== -1;
-                 });
-               }
-             });
+         var _inIntro = false;
 
-             var sharedFields = allFields.filter(function (field) {
-               return sharedTotalFields.indexOf(field) !== -1;
-             });
-             var sharedMoreFields = allMoreFields.filter(function (field) {
-               return sharedTotalFields.indexOf(field) !== -1;
-             });
-             _fieldsArr = [];
-             sharedFields.forEach(function (field) {
-               if (field.matchAllGeometry(geometries)) {
-                 _fieldsArr.push(uiField(context, field, _entityIDs));
-               }
-             });
-             var singularEntity = _entityIDs.length === 1 && graph.hasEntity(_entityIDs[0]);
+         context.inIntro = function (val) {
+           if (!arguments.length) return _inIntro;
+           _inIntro = val;
+           return context;
+         }; // Immediately save the user's history to localstorage, if possible
+         // This is called someteimes, but also on the `window.onbeforeunload` handler
 
-             if (singularEntity && singularEntity.isHighwayIntersection(graph) && presetsManager.field('restrictions')) {
-               _fieldsArr.push(uiField(context, presetsManager.field('restrictions'), _entityIDs));
-             }
 
-             var additionalFields = utilArrayUnion(sharedMoreFields, presetsManager.universal());
-             additionalFields.sort(function (field1, field2) {
-               return field1.label().localeCompare(field2.label(), _mainLocalizer.localeCode());
-             });
-             additionalFields.forEach(function (field) {
-               if (sharedFields.indexOf(field) === -1 && field.matchAllGeometry(geometries)) {
-                 _fieldsArr.push(uiField(context, field, _entityIDs, {
-                   show: false
-                 }));
-               }
-             });
+         context.save = function () {
+           // no history save, no message onbeforeunload
+           if (_inIntro || context.container().select('.modal').size()) return;
+           var canSave;
 
-             _fieldsArr.forEach(function (field) {
-               field.on('change', function (t, onInput) {
-                 dispatch$1.call('change', field, _entityIDs, t, onInput);
-               }).on('revert', function (keys) {
-                 dispatch$1.call('revert', field, keys);
-               });
-             });
-           }
+           if (_mode && _mode.id === 'save') {
+             canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
 
-           _fieldsArr.forEach(function (field) {
-             field.state(_state).tags(_tags);
-           });
+             if (services.osm && services.osm.isChangesetInflight()) {
+               _history.clearSaved();
 
-           selection.call(formFields.fieldsArr(_fieldsArr).state(_state).klass('grouped-items-area'));
-           selection.selectAll('.wrap-form-field input').on('keydown', function (d3_event) {
-             // if user presses enter, and combobox is not active, accept edits..
-             if (d3_event.keyCode === 13 && // ↩ Return
-             context.container().select('.combobox').empty()) {
-               context.enter(modeBrowse(context));
+               return;
              }
-           });
-         }
+           } else {
+             canSave = context.selectedIDs().every(function (id) {
+               var entity = context.hasEntity(id);
+               return entity && !entity.isDegenerate();
+             });
+           }
 
-         section.presets = function (val) {
-           if (!arguments.length) return _presets;
+           if (canSave) {
+             _history.save();
+           }
 
-           if (!_presets || !val || !utilArrayIdentical(_presets, val)) {
-             _presets = val;
-             _fieldsArr = null;
+           if (_history.hasChanges()) {
+             return _t('save.unsaved_changes');
            }
+         }; // Debounce save, since it's a synchronous localStorage write,
+         // and history changes can happen frequently (e.g. when dragging).
 
-           return section;
+
+         context.debouncedSave = debounce(context.save, 350);
+
+         function withDebouncedSave(fn) {
+           return function () {
+             var result = fn.apply(_history, arguments);
+             context.debouncedSave();
+             return result;
+           };
+         }
+         /* Graph */
+
+
+         context.hasEntity = function (id) {
+           return _history.graph().hasEntity(id);
          };
 
-         section.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return section;
+         context.entity = function (id) {
+           return _history.graph().entity(id);
          };
+         /* Modes */
 
-         section.tags = function (val) {
-           if (!arguments.length) return _tags;
-           _tags = val; // Don't reset _fieldsArr here.
 
-           return section;
+         var _mode;
+
+         context.mode = function () {
+           return _mode;
          };
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
+         context.enter = function (newMode) {
+           if (_mode) {
+             _mode.exit();
 
-           if (!val || !_entityIDs || !utilArrayIdentical(_entityIDs, val)) {
-             _entityIDs = val;
-             _fieldsArr = null;
+             dispatch.call('exit', _this, _mode);
            }
 
-           return section;
-         };
-
-         return utilRebind(section, dispatch$1, 'on');
-       }
+           _mode = newMode;
 
-       function uiSectionRawMemberEditor(context) {
-         var section = uiSection('raw-member-editor', context).shouldDisplay(function () {
-           if (!_entityIDs || _entityIDs.length !== 1) return false;
-           var entity = context.hasEntity(_entityIDs[0]);
-           return entity && entity.type === 'relation';
-         }).label(function () {
-           var entity = context.hasEntity(_entityIDs[0]);
-           if (!entity) return '';
-           var gt = entity.members.length > _maxMembers ? '>' : '';
-           var count = gt + entity.members.slice(0, _maxMembers).length;
-           return _t('inspector.title_count', {
-             title: _t.html('inspector.members'),
-             count: count
-           });
-         }).disclosureContent(renderDisclosureContent);
-         var taginfo = services.taginfo;
+           _mode.enter();
 
-         var _entityIDs;
+           dispatch.call('enter', _this, _mode);
+         };
 
-         var _maxMembers = 1000;
+         context.selectedIDs = function () {
+           return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
+         };
 
-         function downloadMember(d3_event, d) {
-           d3_event.preventDefault(); // display the loading indicator
+         context.activeID = function () {
+           return _mode && _mode.activeID && _mode.activeID();
+         };
 
-           select(this.parentNode).classed('tag-reference-loading', true);
-           context.loadEntity(d.id, function () {
-             section.reRender();
-           });
-         }
+         var _selectedNoteID;
 
-         function zoomToMember(d3_event, d) {
-           d3_event.preventDefault();
-           var entity = context.entity(d.id);
-           context.map().zoomToEase(entity); // highlight the feature in case it wasn't previously on-screen
+         context.selectedNoteID = function (noteID) {
+           if (!arguments.length) return _selectedNoteID;
+           _selectedNoteID = noteID;
+           return context;
+         }; // NOTE: Don't change the name of this until UI v3 is merged
 
-           utilHighlightEntities([d.id], true, context);
-         }
 
-         function selectMember(d3_event, d) {
-           d3_event.preventDefault(); // remove the hover-highlight styling
+         var _selectedErrorID;
 
-           utilHighlightEntities([d.id], false, context);
-           var entity = context.entity(d.id);
-           var mapExtent = context.map().extent();
+         context.selectedErrorID = function (errorID) {
+           if (!arguments.length) return _selectedErrorID;
+           _selectedErrorID = errorID;
+           return context;
+         };
+         /* Behaviors */
 
-           if (!entity.intersects(mapExtent, context.graph())) {
-             // zoom to the entity if its extent is not visible now
-             context.map().zoomToEase(entity);
-           }
 
-           context.enter(modeSelect(context, [d.id]));
-         }
+         context.install = function (behavior) {
+           return context.surface().call(behavior);
+         };
 
-         function changeRole(d3_event, d) {
-           var oldRole = d.role;
-           var newRole = context.cleanRelationRole(select(this).property('value'));
+         context.uninstall = function (behavior) {
+           return context.surface().call(behavior.off);
+         };
+         /* Copy/Paste */
 
-           if (oldRole !== newRole) {
-             var member = {
-               id: d.id,
-               type: d.type,
-               role: newRole
-             };
-             context.perform(actionChangeMember(d.relation.id, member, d.index), _t('operations.change_role.annotation', {
-               n: 1
-             }));
-             context.validator().validate();
-           }
-         }
 
-         function deleteMember(d3_event, d) {
-           // remove the hover-highlight styling
-           utilHighlightEntities([d.id], false, context);
-           context.perform(actionDeleteMember(d.relation.id, d.index), _t('operations.delete_member.annotation', {
-             n: 1
-           }));
+         var _copyGraph;
 
-           if (!context.hasEntity(d.relation.id)) {
-             // Removing the last member will also delete the relation.
-             // If this happens we need to exit the selection mode
-             context.enter(modeBrowse(context));
-           } else {
-             // Changing the mode also runs `validate`, but otherwise we need to
-             // rerun it manually
-             context.validator().validate();
-           }
-         }
+         context.copyGraph = function () {
+           return _copyGraph;
+         };
 
-         function renderDisclosureContent(selection) {
-           var entityID = _entityIDs[0];
-           var memberships = [];
-           var entity = context.entity(entityID);
-           entity.members.slice(0, _maxMembers).forEach(function (member, index) {
-             memberships.push({
-               index: index,
-               id: member.id,
-               type: member.type,
-               role: member.role,
-               relation: entity,
-               member: context.hasEntity(member.id),
-               domId: utilUniqueDomId(entityID + '-member-' + index)
-             });
-           });
-           var list = selection.selectAll('.member-list').data([0]);
-           list = list.enter().append('ul').attr('class', 'member-list').merge(list);
-           var items = list.selectAll('li').data(memberships, function (d) {
-             return osmEntity.key(d.relation) + ',' + d.index + ',' + (d.member ? osmEntity.key(d.member) : 'incomplete');
-           });
-           items.exit().each(unbind).remove();
-           var itemsEnter = items.enter().append('li').attr('class', 'member-row form-field').classed('member-incomplete', function (d) {
-             return !d.member;
-           });
-           itemsEnter.each(function (d) {
-             var item = select(this);
-             var label = item.append('label').attr('class', 'field-label').attr('for', d.domId);
+         var _copyIDs = [];
 
-             if (d.member) {
-               // highlight the member feature in the map while hovering on the list item
-               item.on('mouseover', function () {
-                 utilHighlightEntities([d.id], true, context);
-               }).on('mouseout', function () {
-                 utilHighlightEntities([d.id], false, context);
-               });
-               var labelLink = label.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectMember);
-               labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
-                 var matched = _mainPresetIndex.match(d.member, context.graph());
-                 return matched && matched.name() || utilDisplayType(d.member.id);
-               });
-               labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
-                 return utilDisplayName(d.member);
-               });
-               label.append('button').attr('title', _t('icons.remove')).attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete'));
-               label.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToMember);
-             } else {
-               var labelText = label.append('span').attr('class', 'label-text');
-               labelText.append('span').attr('class', 'member-entity-type').html(_t.html('inspector.' + d.type, {
-                 id: d.id
-               }));
-               labelText.append('span').attr('class', 'member-entity-name').html(_t.html('inspector.incomplete', {
-                 id: d.id
-               }));
-               label.append('button').attr('class', 'member-download').attr('title', _t('icons.download')).call(svgIcon('#iD-icon-load')).on('click', downloadMember);
-             }
-           });
-           var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
-           wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
-             return d.domId;
-           }).property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto);
+         context.copyIDs = function (val) {
+           if (!arguments.length) return _copyIDs;
+           _copyIDs = val;
+           _copyGraph = _history.graph();
+           return context;
+         };
 
-           if (taginfo) {
-             wrapEnter.each(bindTypeahead);
-           } // update
+         var _copyLonLat;
 
+         context.copyLonLat = function (val) {
+           if (!arguments.length) return _copyLonLat;
+           _copyLonLat = val;
+           return context;
+         };
+         /* Background */
 
-           items = items.merge(itemsEnter).order();
-           items.select('input.member-role').property('value', function (d) {
-             return d.role;
-           }).on('blur', changeRole).on('change', changeRole);
-           items.select('button.member-delete').on('click', deleteMember);
-           var dragOrigin, targetIndex;
-           items.call(d3_drag().on('start', function (d3_event) {
-             dragOrigin = {
-               x: d3_event.x,
-               y: d3_event.y
-             };
-             targetIndex = null;
-           }).on('drag', function (d3_event) {
-             var x = d3_event.x - dragOrigin.x,
-                 y = d3_event.y - dragOrigin.y;
-             if (!select(this).classed('dragging') && // don't display drag until dragging beyond a distance threshold
-             Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2)) <= 5) return;
-             var index = items.nodes().indexOf(this);
-             select(this).classed('dragging', true);
-             targetIndex = null;
-             selection.selectAll('li.member-row').style('transform', function (d2, index2) {
-               var node = select(this).node();
 
-               if (index === index2) {
-                 return 'translate(' + x + 'px, ' + y + 'px)';
-               } else if (index2 > index && d3_event.y > node.offsetTop) {
-                 if (targetIndex === null || index2 > targetIndex) {
-                   targetIndex = index2;
-                 }
+         var _background;
 
-                 return 'translateY(-100%)';
-               } else if (index2 < index && d3_event.y < node.offsetTop + node.offsetHeight) {
-                 if (targetIndex === null || index2 < targetIndex) {
-                   targetIndex = index2;
-                 }
+         context.background = function () {
+           return _background;
+         };
+         /* Features */
 
-                 return 'translateY(100%)';
-               }
 
-               return null;
-             });
-           }).on('end', function (d3_event, d) {
-             if (!select(this).classed('dragging')) return;
-             var index = items.nodes().indexOf(this);
-             select(this).classed('dragging', false);
-             selection.selectAll('li.member-row').style('transform', null);
+         var _features;
 
-             if (targetIndex !== null) {
-               // dragged to a new position, reorder
-               context.perform(actionMoveMember(d.relation.id, index, targetIndex), _t('operations.reorder_members.annotation'));
-               context.validator().validate();
-             }
-           }));
+         context.features = function () {
+           return _features;
+         };
 
-           function bindTypeahead(d) {
-             var row = select(this);
-             var role = row.selectAll('input.member-role');
-             var origValue = role.property('value');
+         context.hasHiddenConnections = function (id) {
+           var graph = _history.graph();
 
-             function sort(value, data) {
-               var sameletter = [];
-               var other = [];
+           var entity = graph.entity(id);
+           return _features.hasHiddenConnections(entity, graph);
+         };
+         /* Photos */
 
-               for (var i = 0; i < data.length; i++) {
-                 if (data[i].value.substring(0, value.length) === value) {
-                   sameletter.push(data[i]);
-                 } else {
-                   other.push(data[i]);
-                 }
-               }
 
-               return sameletter.concat(other);
-             }
+         var _photos;
 
-             role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
-               // The `geometry` param is used in the `taginfo.js` interface for
-               // filtering results, as a key into the `tag_members_fractions`
-               // object.  If we don't know the geometry because the member is
-               // not yet downloaded, it's ok to guess based on type.
-               var geometry;
+         context.photos = function () {
+           return _photos;
+         };
+         /* Map */
 
-               if (d.member) {
-                 geometry = context.graph().geometry(d.member.id);
-               } else if (d.type === 'relation') {
-                 geometry = 'relation';
-               } else if (d.type === 'way') {
-                 geometry = 'line';
-               } else {
-                 geometry = 'point';
-               }
 
-               var rtype = entity.tags.type;
-               taginfo.roles({
-                 debounce: true,
-                 rtype: rtype || '',
-                 geometry: geometry,
-                 query: role
-               }, function (err, data) {
-                 if (!err) callback(sort(role, data));
-               });
-             }).on('cancel', function () {
-               role.property('value', origValue);
-             }));
-           }
+         var _map;
 
-           function unbind() {
-             var row = select(this);
-             row.selectAll('input.member-role').call(uiCombobox.off, context);
-           }
-         }
+         context.map = function () {
+           return _map;
+         };
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return section;
+         context.layers = function () {
+           return _map.layers();
          };
 
-         return section;
-       }
+         context.surface = function () {
+           return _map.surface;
+         };
 
-       function actionDeleteMembers(relationId, memberIndexes) {
-         return function (graph) {
-           // Remove the members in descending order so removals won't shift what members
-           // are at the remaining indexes
-           memberIndexes.sort(function (a, b) {
-             return b - a;
-           });
+         context.editableDataEnabled = function () {
+           return _map.editableDataEnabled();
+         };
 
-           for (var i in memberIndexes) {
-             graph = actionDeleteMember(relationId, memberIndexes[i])(graph);
-           }
+         context.surfaceRect = function () {
+           return _map.surface.node().getBoundingClientRect();
+         };
 
-           return graph;
+         context.editable = function () {
+           // don't allow editing during save
+           var mode = context.mode();
+           if (!mode || mode.id === 'save') return false;
+           return _map.editableDataEnabled();
          };
-       }
+         /* Debug */
 
-       function uiSectionRawMembershipEditor(context) {
-         var section = uiSection('raw-membership-editor', context).shouldDisplay(function () {
-           return _entityIDs && _entityIDs.length;
-         }).label(function () {
-           var parents = getSharedParentRelations();
-           var gt = parents.length > _maxMemberships ? '>' : '';
-           var count = gt + parents.slice(0, _maxMemberships).length;
-           return _t('inspector.title_count', {
-             title: _t.html('inspector.relations'),
-             count: count
-           });
-         }).disclosureContent(renderDisclosureContent);
-         var taginfo = services.taginfo;
-         var nearbyCombo = uiCombobox(context, 'parent-relation').minItems(1).fetcher(fetchNearbyRelations).itemsMouseEnter(function (d3_event, d) {
-           if (d.relation) utilHighlightEntities([d.relation.id], true, context);
-         }).itemsMouseLeave(function (d3_event, d) {
-           if (d.relation) utilHighlightEntities([d.relation.id], false, context);
-         });
-         var _inChange = false;
-         var _entityIDs = [];
 
-         var _showBlank;
+         var _debugFlags = {
+           tile: false,
+           // tile boundaries
+           collision: false,
+           // label collision bounding boxes
+           imagery: false,
+           // imagery bounding polygons
+           target: false,
+           // touch targets
+           downloaded: false // downloaded data from osm
 
-         var _maxMemberships = 1000;
+         };
 
-         function getSharedParentRelations() {
-           var parents = [];
+         context.debugFlags = function () {
+           return _debugFlags;
+         };
 
-           for (var i = 0; i < _entityIDs.length; i++) {
-             var entity = context.graph().hasEntity(_entityIDs[i]);
-             if (!entity) continue;
+         context.getDebug = function (flag) {
+           return flag && _debugFlags[flag];
+         };
 
-             if (i === 0) {
-               parents = context.graph().parentRelations(entity);
-             } else {
-               parents = utilArrayIntersection(parents, context.graph().parentRelations(entity));
-             }
+         context.setDebug = function (flag, val) {
+           if (arguments.length === 1) val = true;
+           _debugFlags[flag] = val;
+           dispatch.call('change');
+           return context;
+         };
+         /* Container */
 
-             if (!parents.length) break;
-           }
 
-           return parents;
-         }
+         var _container = select(null);
 
-         function getMemberships() {
-           var memberships = [];
-           var relations = getSharedParentRelations().slice(0, _maxMemberships);
-           var isMultiselect = _entityIDs.length > 1;
-           var i, relation, membership, index, member, indexedMember;
+         context.container = function (val) {
+           if (!arguments.length) return _container;
+           _container = val;
 
-           for (i = 0; i < relations.length; i++) {
-             relation = relations[i];
-             membership = {
-               relation: relation,
-               members: [],
-               hash: osmEntity.key(relation)
-             };
+           _container.classed('ideditor', true);
 
-             for (index = 0; index < relation.members.length; index++) {
-               member = relation.members[index];
+           return context;
+         };
 
-               if (_entityIDs.indexOf(member.id) !== -1) {
-                 indexedMember = Object.assign({}, member, {
-                   index: index
-                 });
-                 membership.members.push(indexedMember);
-                 membership.hash += ',' + index.toString();
+         context.containerNode = function (val) {
+           if (!arguments.length) return context.container().node();
+           context.container(select(val));
+           return context;
+         };
 
-                 if (!isMultiselect) {
-                   // For single selections, list one entry per membership per relation.
-                   // For multiselections, list one entry per relation.
-                   memberships.push(membership);
-                   membership = {
-                     relation: relation,
-                     members: [],
-                     hash: osmEntity.key(relation)
-                   };
-                 }
-               }
-             }
+         var _embed;
 
-             if (membership.members.length) memberships.push(membership);
-           }
+         context.embed = function (val) {
+           if (!arguments.length) return _embed;
+           _embed = val;
+           return context;
+         };
+         /* Assets */
 
-           memberships.forEach(function (membership) {
-             membership.domId = utilUniqueDomId('membership-' + membership.relation.id);
-             var roles = [];
-             membership.members.forEach(function (member) {
-               if (roles.indexOf(member.role) === -1) roles.push(member.role);
-             });
-             membership.role = roles.length === 1 ? roles[0] : roles;
-           });
-           return memberships;
-         }
 
-         function selectRelation(d3_event, d) {
-           d3_event.preventDefault(); // remove the hover-highlight styling
+         var _assetPath = '';
 
-           utilHighlightEntities([d.relation.id], false, context);
-           context.enter(modeSelect(context, [d.relation.id]));
-         }
+         context.assetPath = function (val) {
+           if (!arguments.length) return _assetPath;
+           _assetPath = val;
+           _mainFileFetcher.assetPath(val);
+           return context;
+         };
 
-         function zoomToRelation(d3_event, d) {
-           d3_event.preventDefault();
-           var entity = context.entity(d.relation.id);
-           context.map().zoomToEase(entity); // highlight the relation in case it wasn't previously on-screen
+         var _assetMap = {};
 
-           utilHighlightEntities([d.relation.id], true, context);
-         }
+         context.assetMap = function (val) {
+           if (!arguments.length) return _assetMap;
+           _assetMap = val;
+           _mainFileFetcher.assetMap(val);
+           return context;
+         };
 
-         function changeRole(d3_event, d) {
-           if (d === 0) return; // called on newrow (shouldn't happen)
+         context.asset = function (val) {
+           if (/^http(s)?:\/\//i.test(val)) return val;
+           var filename = _assetPath + val;
+           return _assetMap[filename] || filename;
+         };
 
-           if (_inChange) return; // avoid accidental recursive call #5731
+         context.imagePath = function (val) {
+           return context.asset("img/".concat(val));
+         };
+         /* reset (aka flush) */
 
-           var newRole = context.cleanRelationRole(select(this).property('value'));
-           if (!newRole.trim() && typeof d.role !== 'string') return;
-           var membersToUpdate = d.members.filter(function (member) {
-             return member.role !== newRole;
+
+         context.reset = context.flush = function () {
+           context.debouncedSave.cancel();
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
+
+             _deferred["delete"](handle);
+           });
+           Object.values(services).forEach(function (service) {
+             if (service && typeof service.reset === 'function') {
+               service.reset(context);
+             }
            });
+           context.changeset = null;
 
-           if (membersToUpdate.length) {
-             _inChange = true;
-             context.perform(function actionChangeMemberRoles(graph) {
-               membersToUpdate.forEach(function (member) {
-                 var newMember = Object.assign({}, member, {
-                   role: newRole
-                 });
-                 delete newMember.index;
-                 graph = actionChangeMember(d.relation.id, newMember, member.index)(graph);
-               });
-               return graph;
-             }, _t('operations.change_role.annotation', {
-               n: membersToUpdate.length
-             }));
-             context.validator().validate();
-           }
+           _validator.reset();
 
-           _inChange = false;
-         }
+           _features.reset();
 
-         function addMembership(d, role) {
-           this.blur(); // avoid keeping focus on the button
+           _history.reset();
 
-           _showBlank = false;
+           _uploader.reset(); // don't leave stale state in the inspector
 
-           function actionAddMembers(relationId, ids, role) {
-             return function (graph) {
-               for (var i in ids) {
-                 var member = {
-                   id: ids[i],
-                   type: graph.entity(ids[i]).type,
-                   role: role
-                 };
-                 graph = actionAddMember(relationId, member)(graph);
-               }
 
-               return graph;
-             };
-           }
+           context.container().select('.inspector-wrap *').remove();
+           return context;
+         };
+         /* Projections */
 
-           if (d.relation) {
-             context.perform(actionAddMembers(d.relation.id, _entityIDs, role), _t('operations.add_member.annotation', {
-               n: _entityIDs.length
-             }));
-             context.validator().validate();
-           } else {
-             var relation = osmRelation();
-             context.perform(actionAddEntity(relation), actionAddMembers(relation.id, _entityIDs, role), _t('operations.add.annotation.relation')); // changing the mode also runs `validate`
 
-             context.enter(modeSelect(context, [relation.id]).newFeature(true));
-           }
-         }
+         context.projection = geoRawMercator();
+         context.curtainProjection = geoRawMercator();
+         /* Init */
 
-         function deleteMembership(d3_event, d) {
-           this.blur(); // avoid keeping focus on the button
+         context.init = function () {
+           instantiateInternal();
+           initializeDependents();
+           return context; // Load variables and properties. No property of `context` should be accessed
+           // until this is complete since load statuses are indeterminate. The order
+           // of instantiation shouldn't matter.
 
-           if (d === 0) return; // called on newrow (shouldn't happen)
-           // remove the hover-highlight styling
+           function instantiateInternal() {
+             _history = coreHistory(context);
+             context.graph = _history.graph;
+             context.pauseChangeDispatch = _history.pauseChangeDispatch;
+             context.resumeChangeDispatch = _history.resumeChangeDispatch;
+             context.perform = withDebouncedSave(_history.perform);
+             context.replace = withDebouncedSave(_history.replace);
+             context.pop = withDebouncedSave(_history.pop);
+             context.overwrite = withDebouncedSave(_history.overwrite);
+             context.undo = withDebouncedSave(_history.undo);
+             context.redo = withDebouncedSave(_history.redo);
+             _validator = coreValidator(context);
+             _uploader = coreUploader(context);
+             _background = rendererBackground(context);
+             _features = rendererFeatures(context);
+             _map = rendererMap(context);
+             _photos = rendererPhotos(context);
+             _ui = uiInit(context);
+           } // Set up objects that might need to access properties of `context`. The order
+           // might matter if dependents make calls to each other. Be wary of async calls.
 
-           utilHighlightEntities([d.relation.id], false, context);
-           var indexes = d.members.map(function (member) {
-             return member.index;
-           });
-           context.perform(actionDeleteMembers(d.relation.id, indexes), _t('operations.delete_member.annotation', {
-             n: _entityIDs.length
-           }));
-           context.validator().validate();
-         }
 
-         function fetchNearbyRelations(q, callback) {
-           var newRelation = {
-             relation: null,
-             value: _t('inspector.new_relation'),
-             display: _t.html('inspector.new_relation')
-           };
-           var entityID = _entityIDs[0];
-           var result = [];
-           var graph = context.graph();
+           function initializeDependents() {
+             if (context.initialHashParams.presets) {
+               _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
+             }
 
-           function baseDisplayLabel(entity) {
-             var matched = _mainPresetIndex.match(entity, graph);
-             var presetName = matched && matched.name() || _t('inspector.relation');
-             var entityName = utilDisplayName(entity) || '';
-             return presetName + ' ' + entityName;
-           }
+             if (context.initialHashParams.locale) {
+               _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
+             } // kick off some async work
 
-           var explicitRelation = q && context.hasEntity(q.toLowerCase());
 
-           if (explicitRelation && explicitRelation.type === 'relation' && explicitRelation.id !== entityID) {
-             // loaded relation is specified explicitly, only show that
-             result.push({
-               relation: explicitRelation,
-               value: baseDisplayLabel(explicitRelation) + ' ' + explicitRelation.id
-             });
-           } else {
-             context.history().intersects(context.map().extent()).forEach(function (entity) {
-               if (entity.type !== 'relation' || entity.id === entityID) return;
-               var value = baseDisplayLabel(entity);
-               if (q && (value + ' ' + entity.id).toLowerCase().indexOf(q.toLowerCase()) === -1) return;
-               result.push({
-                 relation: entity,
-                 value: value
-               });
-             });
-             result.sort(function (a, b) {
-               return osmRelation.creationOrder(a.relation, b.relation);
-             }); // Dedupe identical names by appending relation id - see #2891
+             _mainLocalizer.ensureLoaded();
 
-             var dupeGroups = Object.values(utilArrayGroupBy(result, 'value')).filter(function (v) {
-               return v.length > 1;
-             });
-             dupeGroups.forEach(function (group) {
-               group.forEach(function (obj) {
-                 obj.value += ' ' + obj.relation.id;
-               });
+             _background.ensureLoaded();
+
+             _mainPresetIndex.ensureLoaded();
+             Object.values(services).forEach(function (service) {
+               if (service && typeof service.init === 'function') {
+                 service.init();
+               }
              });
-           }
 
-           result.forEach(function (obj) {
-             obj.title = obj.value;
-           });
-           result.unshift(newRelation);
-           callback(result);
-         }
+             _map.init();
 
-         function renderDisclosureContent(selection) {
-           var memberships = getMemberships();
-           var list = selection.selectAll('.member-list').data([0]);
-           list = list.enter().append('ul').attr('class', 'member-list').merge(list);
-           var items = list.selectAll('li.member-row-normal').data(memberships, function (d) {
-             return d.hash;
-           });
-           items.exit().each(unbind).remove(); // Enter
+             _validator.init();
 
-           var itemsEnter = items.enter().append('li').attr('class', 'member-row member-row-normal form-field'); // highlight the relation in the map while hovering on the list item
+             _features.init();
 
-           itemsEnter.on('mouseover', function (d3_event, d) {
-             utilHighlightEntities([d.relation.id], true, context);
-           }).on('mouseout', function (d3_event, d) {
-             utilHighlightEntities([d.relation.id], false, context);
-           });
-           var labelEnter = itemsEnter.append('label').attr('class', 'field-label').attr('for', function (d) {
-             return d.domId;
-           });
-           var labelLink = labelEnter.append('span').attr('class', 'label-text').append('a').attr('href', '#').on('click', selectRelation);
-           labelLink.append('span').attr('class', 'member-entity-type').html(function (d) {
-             var matched = _mainPresetIndex.match(d.relation, context.graph());
-             return matched && matched.name() || _t('inspector.relation');
-           });
-           labelLink.append('span').attr('class', 'member-entity-name').html(function (d) {
-             return utilDisplayName(d.relation);
-           });
-           labelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', deleteMembership);
-           labelEnter.append('button').attr('class', 'member-zoom').attr('title', _t('icons.zoom_to')).call(svgIcon('#iD-icon-framed-dot', 'monochrome')).on('click', zoomToRelation);
-           var wrapEnter = itemsEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
-           wrapEnter.append('input').attr('class', 'member-role').attr('id', function (d) {
-             return d.domId;
-           }).property('type', 'text').property('value', function (d) {
-             return typeof d.role === 'string' ? d.role : '';
-           }).attr('title', function (d) {
-             return Array.isArray(d.role) ? d.role.filter(Boolean).join('\n') : d.role;
-           }).attr('placeholder', function (d) {
-             return Array.isArray(d.role) ? _t('inspector.multiple_roles') : _t('inspector.role');
-           }).classed('mixed', function (d) {
-             return Array.isArray(d.role);
-           }).call(utilNoAuto).on('blur', changeRole).on('change', changeRole);
+             if (services.maprules && context.initialHashParams.maprules) {
+               d3_json(context.initialHashParams.maprules).then(function (mapcss) {
+                 services.maprules.init();
+                 mapcss.forEach(function (mapcssSelector) {
+                   return services.maprules.addRule(mapcssSelector);
+                 });
+               })["catch"](function () {
+                 /* ignore */
+               });
+             } // if the container isn't available, e.g. when testing, don't load the UI
 
-           if (taginfo) {
-             wrapEnter.each(bindTypeahead);
+
+             if (!context.container().empty()) {
+               _ui.ensureLoaded().then(function () {
+                 _photos.init();
+               });
+             }
            }
+         };
 
-           var newMembership = list.selectAll('.member-row-new').data(_showBlank ? [0] : []); // Exit
+         return context;
+       }
 
-           newMembership.exit().remove(); // Enter
+       // NSI contains the most correct tagging for many commonly mapped features.
+       // See https://github.com/osmlab/name-suggestion-index  and  https://nsi.guide
+       // DATA
 
-           var newMembershipEnter = newMembership.enter().append('li').attr('class', 'member-row member-row-new form-field');
-           var newLabelEnter = newMembershipEnter.append('label').attr('class', 'field-label');
-           newLabelEnter.append('input').attr('placeholder', _t('inspector.choose_relation')).attr('type', 'text').attr('class', 'member-entity-input').call(utilNoAuto);
-           newLabelEnter.append('button').attr('class', 'remove member-delete').call(svgIcon('#iD-operation-delete')).on('click', function () {
-             list.selectAll('.member-row-new').remove();
-           });
-           var newWrapEnter = newMembershipEnter.append('div').attr('class', 'form-field-input-wrap form-field-input-member');
-           newWrapEnter.append('input').attr('class', 'member-role').property('type', 'text').attr('placeholder', _t('inspector.role')).call(utilNoAuto); // Update
+       var _nsiStatus = 'loading'; // 'loading', 'ok', 'failed'
+
+       var _nsi = {}; // Sometimes we can upgrade a feature tagged like `building=yes` to a better tag.
+
+       var buildingPreset = {
+         'building/commercial': true,
+         'building/government': true,
+         'building/hotel': true,
+         'building/retail': true,
+         'building/office': true,
+         'building/supermarket': true,
+         'building/yes': true
+       }; // Exceptions to the namelike regexes.
+       // Usually a tag suffix contains a language code like `name:en`, `name:ru`
+       // but we want to exclude things like `operator:type`, `name:etymology`, etc..
 
-           newMembership = newMembership.merge(newMembershipEnter);
-           newMembership.selectAll('.member-entity-input').on('blur', cancelEntity) // if it wasn't accepted normally, cancel it
-           .call(nearbyCombo.on('accept', acceptEntity).on('cancel', cancelEntity)); // Container for the Add button
+       var notNames = /:(colou?r|type|forward|backward|left|right|etymology|pronunciation|wikipedia)$/i; // Exceptions to the branchlike regexes
 
-           var addRow = selection.selectAll('.add-row').data([0]); // enter
+       var notBranches = /(coop|express|wireless|factory|outlet)/i; // PRIVATE FUNCTIONS
+       // `setNsiSources()`
+       // Adds the sources to iD's filemap so we can start downloading data.
+       //
 
-           var addRowEnter = addRow.enter().append('div').attr('class', 'add-row');
-           var addRelationButton = addRowEnter.append('button').attr('class', 'add-relation');
-           addRelationButton.call(svgIcon('#iD-icon-plus', 'light'));
-           addRelationButton.call(uiTooltip().title(_t.html('inspector.add_to_relation')).placement(_mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left'));
-           addRowEnter.append('div').attr('class', 'space-value'); // preserve space
+       function setNsiSources() {
+         var nsiVersion = packageJSON.devDependencies['name-suggestion-index'];
+         var v = parseVersion(nsiVersion);
+         var vMinor = "".concat(v.major, ".").concat(v.minor);
+         var sources = {
+           'nsi_data': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/nsi.min.json"),
+           'nsi_dissolved': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/dissolved.min.json"),
+           'nsi_features': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/featureCollection.min.json"),
+           'nsi_generics': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/genericWords.min.json"),
+           'nsi_presets': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/presets/nsi-id-presets.min.json"),
+           'nsi_replacements': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/replacements.min.json"),
+           'nsi_trees': "https://cdn.jsdelivr.net/npm/name-suggestion-index@".concat(vMinor, "/dist/trees.min.json")
+         };
+         var fileMap = _mainFileFetcher.fileMap();
+
+         for (var k in sources) {
+           if (!fileMap[k]) fileMap[k] = sources[k];
+         }
+       } // `loadNsiPresets()`
+       //  Returns a Promise fulfilled when the presets have been downloaded and merged into iD.
+       //
 
-           addRowEnter.append('div').attr('class', 'space-buttons'); // preserve space
-           // update
 
-           addRow = addRow.merge(addRowEnter);
-           addRow.select('.add-relation').on('click', function () {
-             _showBlank = true;
-             section.reRender();
-             list.selectAll('.member-entity-input').node().focus();
+       function loadNsiPresets() {
+         return Promise.all([_mainFileFetcher.get('nsi_presets'), _mainFileFetcher.get('nsi_features')]).then(function (vals) {
+           // Add `suggestion=true` to all the nsi presets
+           // The preset json schema doesn't include it, but the iD code still uses it
+           Object.values(vals[0].presets).forEach(function (preset) {
+             return preset.suggestion = true;
+           });
+           _mainPresetIndex.merge({
+             presets: vals[0].presets,
+             featureCollection: vals[1]
            });
+         });
+       } // `loadNsiData()`
+       //  Returns a Promise fulfilled when the other data have been downloaded and processed
+       //
 
-           function acceptEntity(d) {
-             if (!d) {
-               cancelEntity();
-               return;
-             } // remove hover-higlighting
 
+       function loadNsiData() {
+         return Promise.all([_mainFileFetcher.get('nsi_data'), _mainFileFetcher.get('nsi_dissolved'), _mainFileFetcher.get('nsi_replacements'), _mainFileFetcher.get('nsi_trees')]).then(function (vals) {
+           _nsi = {
+             data: vals[0].nsi,
+             // the raw name-suggestion-index data
+             dissolved: vals[1].dissolved,
+             // list of dissolved items
+             replacements: vals[2].replacements,
+             // trivial old->new qid replacements
+             trees: vals[3].trees,
+             // metadata about trees, main tags
+             kvt: new Map(),
+             // Map (k -> Map (v -> t) )
+             qids: new Map(),
+             // Map (wd/wp tag values -> qids)
+             ids: new Map() // Map (id -> NSI item)
 
-             if (d.relation) utilHighlightEntities([d.relation.id], false, context);
-             var role = context.cleanRelationRole(list.selectAll('.member-row-new .member-role').property('value'));
-             addMembership(d, role);
-           }
+           };
+           _nsi.matcher = new Matcher();
 
-           function cancelEntity() {
-             var input = newMembership.selectAll('.member-entity-input');
-             input.property('value', ''); // remove hover-higlighting
+           _nsi.matcher.buildMatchIndex(_nsi.data);
 
-             context.surface().selectAll('.highlighted').classed('highlighted', false);
-           }
+           _nsi.matcher.buildLocationIndex(_nsi.data, _mainLocations.loco());
 
-           function bindTypeahead(d) {
-             var row = select(this);
-             var role = row.selectAll('input.member-role');
-             var origValue = role.property('value');
+           Object.keys(_nsi.data).forEach(function (tkv) {
+             var category = _nsi.data[tkv];
+             var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-             function sort(value, data) {
-               var sameletter = [];
-               var other = [];
+             var t = parts[0];
+             var k = parts[1];
+             var v = parts[2]; // Build a reverse index of keys -> values -> trees present in the name-suggestion-index
+             // Collect primary keys  (e.g. "amenity", "craft", "shop", "man_made", "route", etc)
+             // "amenity": {
+             //   "restaurant": "brands"
+             // }
 
-               for (var i = 0; i < data.length; i++) {
-                 if (data[i].value.substring(0, value.length) === value) {
-                   sameletter.push(data[i]);
-                 } else {
-                   other.push(data[i]);
-                 }
-               }
+             var vmap = _nsi.kvt.get(k);
 
-               return sameletter.concat(other);
+             if (!vmap) {
+               vmap = new Map();
+
+               _nsi.kvt.set(k, vmap);
              }
 
-             role.call(uiCombobox(context, 'member-role').fetcher(function (role, callback) {
-               var rtype = d.relation.tags.type;
-               taginfo.roles({
-                 debounce: true,
-                 rtype: rtype || '',
-                 geometry: context.graph().geometry(_entityIDs[0]),
-                 query: role
-               }, function (err, data) {
-                 if (!err) callback(sort(role, data));
-               });
-             }).on('cancel', function () {
-               role.property('value', origValue);
-             }));
-           }
+             vmap.set(v, t);
+             var tree = _nsi.trees[t]; // e.g. "brands", "operators"
 
-           function unbind() {
-             var row = select(this);
-             row.selectAll('input.member-role').call(uiCombobox.off, context);
-           }
-         }
+             var mainTag = tree.mainTag; // e.g. "brand:wikidata", "operator:wikidata", etc
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           _showBlank = false;
-           return section;
-         };
+             var items = category.items || [];
+             items.forEach(function (item) {
+               // Remember some useful things for later, cache NSI id -> item
+               item.tkv = tkv;
+               item.mainTag = mainTag;
 
-         return section;
-       }
+               _nsi.ids.set(item.id, item); // Cache Wikidata/Wikipedia values -> qid, for #6416
 
-       function uiSectionSelectionList(context) {
-         var _selectedIDs = [];
-         var section = uiSection('selected-features', context).shouldDisplay(function () {
-           return _selectedIDs.length > 1;
-         }).label(function () {
-           return _t('inspector.title_count', {
-             title: _t.html('inspector.features'),
-             count: _selectedIDs.length
+
+               var wd = item.tags[mainTag];
+               var wp = item.tags[mainTag.replace('wikidata', 'wikipedia')];
+               if (wd) _nsi.qids.set(wd, wd);
+               if (wp && wd) _nsi.qids.set(wp, wd);
+             });
            });
-         }).disclosureContent(renderDisclosureContent);
-         context.history().on('change.selectionList', function (difference) {
-           if (difference) {
-             section.reRender();
-           }
          });
+       } // `gatherKVs()`
+       // Gather all the k/v pairs that we will run through the NSI matcher.
+       // An OSM tags object can contain anything, but only a few tags will be interesting to NSI.
+       //
+       // This function will return the interesting tag pairs like:
+       //   "amenity/restaurant", "man_made/flagpole"
+       // and fallbacks like
+       //   "amenity/yes"
+       // excluding things like
+       //   "tiger:reviewed", "surface", "ref", etc.
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `Object` containing kv pairs to test:
+       //   {
+       //     'primary': Set(),
+       //     'alternate': Set()
+       //   }
+       //
 
-         section.entityIDs = function (val) {
-           if (!arguments.length) return _selectedIDs;
-           _selectedIDs = val;
-           return section;
-         };
 
-         function selectEntity(d3_event, entity) {
-           context.enter(modeSelect(context, [entity.id]));
-         }
+       function gatherKVs(tags) {
+         var primary = new Set();
+         var alternate = new Set();
+         Object.keys(tags).forEach(function (osmkey) {
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-         function deselectEntity(d3_event, entity) {
-           var selectedIDs = _selectedIDs.slice();
+           if (osmkey === 'route_master') osmkey = 'route';
 
-           var index = selectedIDs.indexOf(entity.id);
+           var vmap = _nsi.kvt.get(osmkey);
 
-           if (index > -1) {
-             selectedIDs.splice(index, 1);
-             context.enter(modeSelect(context, selectedIDs));
+           if (!vmap) return; // not an interesting key
+
+           if (vmap.get(osmvalue)) {
+             // Matched a category in NSI
+             primary.add("".concat(osmkey, "/").concat(osmvalue)); // interesting key/value
+           } else if (osmvalue === 'yes') {
+             alternate.add("".concat(osmkey, "/").concat(osmvalue)); // fallback key/yes
            }
-         }
+         }); // Can we try a generic building fallback match? - See #6122, #7197
+         // Only try this if we do a preset match and find nothing else remarkable about that building.
+         // For example, a way with `building=yes` + `name=Westfield` may be a Westfield department store.
+         // But a way with `building=yes` + `name=Westfield` + `public_transport=station` is a train station for a town named "Westfield"
 
-         function renderDisclosureContent(selection) {
-           var list = selection.selectAll('.feature-list').data([0]);
-           list = list.enter().append('ul').attr('class', 'feature-list').merge(list);
+         var preset = _mainPresetIndex.matchTags(tags, 'area');
 
-           var entities = _selectedIDs.map(function (id) {
-             return context.hasEntity(id);
-           }).filter(Boolean);
+         if (buildingPreset[preset.id]) {
+           alternate.add('building/yes');
+         }
 
-           var items = list.selectAll('.feature-list-item').data(entities, osmEntity.key);
-           items.exit().remove(); // Enter
+         return {
+           primary: primary,
+           alternate: alternate
+         };
+       } // `identifyTree()`
+       // NSI has a concept of trees: "brands", "operators", "flags", "transit".
+       // The tree determines things like which tags are namelike, and which tags hold important wikidata.
+       // This takes an Object of tags and tries to identify what tree to use.
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `string` the name of the tree if known
+       //   or 'unknown' if it could match several trees (e.g. amenity/yes)
+       //   or null if no match
+       //
 
-           var enter = items.enter().append('li').attr('class', 'feature-list-item').each(function (d) {
-             select(this).on('mouseover', function () {
-               utilHighlightEntities([d.id], true, context);
-             }).on('mouseout', function () {
-               utilHighlightEntities([d.id], false, context);
-             });
-           });
-           var label = enter.append('button').attr('class', 'label').on('click', selectEntity);
-           label.append('span').attr('class', 'entity-geom-icon').call(svgIcon('', 'pre-text'));
-           label.append('span').attr('class', 'entity-type');
-           label.append('span').attr('class', 'entity-name');
-           enter.append('button').attr('class', 'close').attr('title', _t('icons.deselect')).on('click', deselectEntity).call(svgIcon('#iD-icon-close')); // Update
 
-           items = items.merge(enter);
-           items.selectAll('.entity-geom-icon use').attr('href', function () {
-             var entity = this.parentNode.parentNode.__data__;
-             return '#iD-icon-' + entity.geometry(context.graph());
-           });
-           items.selectAll('.entity-type').html(function (entity) {
-             return _mainPresetIndex.match(entity, context.graph()).name();
-           });
-           items.selectAll('.entity-name').html(function (d) {
-             // fetch latest entity
-             var entity = context.entity(d.id);
-             return utilDisplayName(entity);
-           });
-         }
+       function identifyTree(tags) {
+         var unknown;
+         var t; // Check all tags
 
-         return section;
-       }
+         Object.keys(tags).forEach(function (osmkey) {
+           if (t) return; // found already
 
-       function uiEntityEditor(context) {
-         var dispatch$1 = dispatch('choose');
-         var _state = 'select';
-         var _coalesceChanges = false;
-         var _modified = false;
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return; // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-         var _base;
+           if (osmkey === 'route_master') osmkey = 'route';
 
-         var _entityIDs;
+           var vmap = _nsi.kvt.get(osmkey);
 
-         var _activePresets = [];
+           if (!vmap) return; // this key is not in nsi
 
-         var _newFeature;
+           if (osmvalue === 'yes') {
+             unknown = 'unknown';
+           } else {
+             t = vmap.get(osmvalue);
+           }
+         });
+         return t || unknown || null;
+       } // `gatherNames()`
+       // Gather all the namelike values that we will run through the NSI matcher.
+       // It will gather values primarily from tags `name`, `name:ru`, `flag:name`
+       //  and fallback to alternate tags like `brand`, `brand:ru`, `alt_name`
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `Object` containing namelike values to test:
+       //   {
+       //     'primary': Set(),
+       //     'fallbacks': Set()
+       //   }
+       //
 
-         var _sections;
 
-         function entityEditor(selection) {
-           var combinedTags = utilCombinedTags(_entityIDs, context.graph()); // Header
+       function gatherNames(tags) {
+         var empty = {
+           primary: new Set(),
+           alternate: new Set()
+         };
+         var primary = new Set();
+         var alternate = new Set();
+         var foundSemi = false;
+         var testNameFragments = false;
+         var patterns; // Patterns for matching OSM keys that might contain namelike values.
+         // These roughly correspond to the "trees" concept in name-suggestion-index,
 
-           var header = selection.selectAll('.header').data([0]); // Enter
+         var t = identifyTree(tags);
+         if (!t) return empty;
 
-           var headerEnter = header.enter().append('div').attr('class', 'header fillL');
-           headerEnter.append('button').attr('class', 'preset-reset preset-choose').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-forward' : '#iD-icon-backward'));
-           headerEnter.append('button').attr('class', 'close').on('click', function () {
-             context.enter(modeBrowse(context));
-           }).call(svgIcon(_modified ? '#iD-icon-apply' : '#iD-icon-close'));
-           headerEnter.append('h3'); // Update
+         if (t === 'transit') {
+           patterns = {
+             primary: /^network$/i,
+             alternate: /^(operator|operator:\w+|network:\w+|\w+_name|\w+_name:\w+)$/i
+           };
+         } else if (t === 'flags') {
+           patterns = {
+             primary: /^(flag:name|flag:name:\w+)$/i,
+             alternate: /^(flag|flag:\w+|subject|subject:\w+)$/i // note: no `country`, we special-case it below
 
-           header = header.merge(headerEnter);
-           header.selectAll('h3').html(_entityIDs.length === 1 ? _t.html('inspector.edit') : _t.html('inspector.edit_features'));
-           header.selectAll('.preset-reset').on('click', function () {
-             dispatch$1.call('choose', this, _activePresets);
-           }); // Body
+           };
+         } else if (t === 'brands') {
+           testNameFragments = true;
+           patterns = {
+             primary: /^(name|name:\w+)$/i,
+             alternate: /^(brand|brand:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
+           };
+         } else if (t === 'operators') {
+           testNameFragments = true;
+           patterns = {
+             primary: /^(name|name:\w+|operator|operator:\w+)$/i,
+             alternate: /^(brand|brand:\w+|\w+_name|\w+_name:\w+)/i
+           };
+         } else {
+           // unknown/multiple
+           testNameFragments = true;
+           patterns = {
+             primary: /^(name|name:\w+)$/i,
+             alternate: /^(brand|brand:\w+|network|network:\w+|operator|operator:\w+|\w+_name|\w+_name:\w+)/i
+           };
+         } // Test `name` fragments, longest to shortest, to fit them into a "Name Branch" pattern.
+         // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]
 
-           var body = selection.selectAll('.inspector-body').data([0]); // Enter
 
-           var bodyEnter = body.enter().append('div').attr('class', 'entity-editor inspector-body sep-top'); // Update
+         if (tags.name && testNameFragments) {
+           var nameParts = tags.name.split(/[\s\-\/,.]/);
 
-           body = body.merge(bodyEnter);
+           for (var split = nameParts.length; split > 0; split--) {
+             var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-           if (!_sections) {
-             _sections = [uiSectionSelectionList(context), uiSectionFeatureType(context).on('choose', function (presets) {
-               dispatch$1.call('choose', this, presets);
-             }), uiSectionEntityIssues(context), uiSectionPresetFields(context).on('change', changeTags).on('revert', revertTags), uiSectionRawTagEditor('raw-tag-editor', context).on('change', changeTags), uiSectionRawMemberEditor(context), uiSectionRawMembershipEditor(context)];
+             primary.add(name);
            }
+         } // Check all tags
 
-           _sections.forEach(function (section) {
-             if (section.entityIDs) {
-               section.entityIDs(_entityIDs);
-             }
 
-             if (section.presets) {
-               section.presets(_activePresets);
-             }
+         Object.keys(tags).forEach(function (osmkey) {
+           var osmvalue = tags[osmkey];
+           if (!osmvalue) return;
 
-             if (section.tags) {
-               section.tags(combinedTags);
+           if (isNamelike(osmkey, 'primary')) {
+             if (/;/.test(osmvalue)) {
+               foundSemi = true;
+             } else {
+               primary.add(osmvalue);
+               alternate["delete"](osmvalue);
              }
-
-             if (section.state) {
-               section.state(_state);
+           } else if (!primary.has(osmvalue) && isNamelike(osmkey, 'alternate')) {
+             if (/;/.test(osmvalue)) {
+               foundSemi = true;
+             } else {
+               alternate.add(osmvalue);
              }
+           }
+         }); // For flags only, fallback to `country` tag only if no other namelike values were found.
+         // See https://github.com/openstreetmap/iD/pull/8305#issuecomment-769174070
 
-             body.call(section.render);
-           });
+         if (tags.man_made === 'flagpole' && !primary.size && !alternate.size && !!tags.country) {
+           var osmvalue = tags.country;
 
-           context.history().on('change.entity-editor', historyChanged);
+           if (/;/.test(osmvalue)) {
+             foundSemi = true;
+           } else {
+             alternate.add(osmvalue);
+           }
+         } // If any namelike value contained a semicolon, return empty set and don't try matching anything.
 
-           function historyChanged(difference) {
-             if (selection.selectAll('.entity-editor').empty()) return;
-             if (_state === 'hide') return;
-             var significant = !difference || difference.didChange.properties || difference.didChange.addition || difference.didChange.deletion;
-             if (!significant) return;
-             _entityIDs = _entityIDs.filter(context.hasEntity);
-             if (!_entityIDs.length) return;
-             var priorActivePreset = _activePresets.length === 1 && _activePresets[0];
-             loadActivePresets();
-             var graph = context.graph();
-             entityEditor.modified(_base !== graph);
-             entityEditor(selection);
 
-             if (priorActivePreset && _activePresets.length === 1 && priorActivePreset !== _activePresets[0]) {
-               // flash the button to indicate the preset changed
-               context.container().selectAll('.entity-editor button.preset-reset .label').style('background-color', '#fff').transition().duration(750).style('background-color', null);
-             }
-           }
-         } // Tag changes that fire on input can all get coalesced into a single
-         // history operation when the user leaves the field.  #2342
-         // Use explicit entityIDs in case the selection changes before the event is fired.
+         if (foundSemi) {
+           return empty;
+         } else {
+           return {
+             primary: primary,
+             alternate: alternate
+           };
+         }
 
+         function isNamelike(osmkey, which) {
+           if (osmkey === 'old_name') return false;
+           return patterns[which].test(osmkey) && !notNames.test(osmkey);
+         }
+       } // `gatherTuples()`
+       // Generate all combinations of [key,value,name] that we want to test.
+       // This prioritizes them so that the primary name and k/v pairs go first
+       //
+       // Arguments
+       //   `tryKVs`: `Object` containing primary and alternate k/v pairs to test
+       //   `tryNames`: `Object` containing primary and alternate names to test
+       // Returns
+       //   `Array`: tuple objects ordered by priority
+       //
 
-         function changeTags(entityIDs, changed, onInput) {
-           var actions = [];
 
-           for (var i in entityIDs) {
-             var entityID = entityIDs[i];
-             var entity = context.entity(entityID);
-             var tags = Object.assign({}, entity.tags); // shallow copy
+       function gatherTuples(tryKVs, tryNames) {
+         var tuples = [];
+         ['primary', 'alternate'].forEach(function (whichName) {
+           // test names longest to shortest
+           var arr = Array.from(tryNames[whichName]).sort(function (a, b) {
+             return b.length - a.length;
+           });
+           arr.forEach(function (n) {
+             ['primary', 'alternate'].forEach(function (whichKV) {
+               tryKVs[whichKV].forEach(function (kv) {
+                 var parts = kv.split('/', 2);
+                 var k = parts[0];
+                 var v = parts[1];
+                 tuples.push({
+                   k: k,
+                   v: v,
+                   n: n
+                 });
+               });
+             });
+           });
+         });
+         return tuples;
+       } // `_upgradeTags()`
+       // Try to match a feature to a canonical record in name-suggestion-index
+       // and upgrade the tags to match.
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       //   `loc`: Location where this feature exists, as a [lon, lat]
+       // Returns
+       //   `Object` containing the result, or `null` if no changes needed:
+       //   {
+       //     'newTags': `Object` - The tags the the feature should have
+       //     'matched': `Object` - The matched item
+       //   }
+       //
 
-             for (var k in changed) {
-               if (!k) continue;
-               var v = changed[k];
 
-               if (v !== undefined || tags.hasOwnProperty(k)) {
-                 tags[k] = v;
+       function _upgradeTags(tags, loc) {
+         var newTags = Object.assign({}, tags); // shallow copy
+
+         var changed = false; // Before anything, perform trivial Wikipedia/Wikidata replacements
+
+         Object.keys(newTags).forEach(function (osmkey) {
+           var matchTag = osmkey.match(/^(\w+:)?wikidata$/);
+
+           if (matchTag) {
+             // Look at '*:wikidata' tags
+             var prefix = matchTag[1] || '';
+             var wd = newTags[osmkey];
+             var replace = _nsi.replacements[wd]; // If it matches a QID in the replacement list...
+
+             if (replace && replace.wikidata !== undefined) {
+               // replace or delete `*:wikidata` tag
+               changed = true;
+
+               if (replace.wikidata) {
+                 newTags[osmkey] = replace.wikidata;
+               } else {
+                 delete newTags[osmkey];
                }
              }
 
-             if (!onInput) {
-               tags = utilCleanTags(tags);
-             }
+             if (replace && replace.wikipedia !== undefined) {
+               // replace or delete `*:wikipedia` tag
+               changed = true;
+               var wpkey = "".concat(prefix, "wikipedia");
 
-             if (!fastDeepEqual(entity.tags, tags)) {
-               actions.push(actionChangeTags(entityID, tags));
+               if (replace.wikipedia) {
+                 newTags[wpkey] = replace.wikipedia;
+               } else {
+                 delete newTags[wpkey];
+               }
              }
            }
+         }); // Match a 'route_master' as if it were a 'route' - name-suggestion-index#5184
 
-           if (actions.length) {
-             var combinedAction = function combinedAction(graph) {
-               actions.forEach(function (action) {
-                 graph = action(graph);
-               });
-               return graph;
-             };
+         var isRouteMaster = tags.type === 'route_master'; // Gather key/value tag pairs to try to match
 
-             var annotation = _t('operations.change_tags.annotation');
+         var tryKVs = gatherKVs(tags);
 
-             if (_coalesceChanges) {
-               context.overwrite(combinedAction, annotation);
-             } else {
-               context.perform(combinedAction, annotation);
-               _coalesceChanges = !!onInput;
-             }
-           } // if leaving field (blur event), rerun validation
+         if (!tryKVs.primary.size && !tryKVs.alternate.size) {
+           return changed ? {
+             newTags: newTags,
+             matched: null
+           } : null;
+         } // Gather namelike tag values to try to match
 
 
-           if (!onInput) {
-             context.validator().validate();
-           }
-         }
+         var tryNames = gatherNames(tags); // Do `wikidata=*` or `wikipedia=*` tags identify this entity as a chain? - See #6416
+         // If so, these tags can be swapped to e.g. `brand:wikidata`/`brand:wikipedia`.
 
-         function revertTags(keys) {
-           var actions = [];
+         var foundQID = _nsi.qids.get(tags.wikidata) || _nsi.qids.get(tags.wikipedia);
 
-           for (var i in _entityIDs) {
-             var entityID = _entityIDs[i];
-             var original = context.graph().base().entities[entityID];
-             var changed = {};
+         if (foundQID) tryNames.primary.add(foundQID); // matcher will recognize the Wikidata QID as name too
 
-             for (var j in keys) {
-               var key = keys[j];
-               changed[key] = original ? original.tags[key] : undefined;
-             }
+         if (!tryNames.primary.size && !tryNames.alternate.size) {
+           return changed ? {
+             newTags: newTags,
+             matched: null
+           } : null;
+         } // Order the [key,value,name] tuples - test primary names before alternate names
 
-             var entity = context.entity(entityID);
-             var tags = Object.assign({}, entity.tags); // shallow copy
 
-             for (var k in changed) {
-               if (!k) continue;
-               var v = changed[k];
+         var tuples = gatherTuples(tryKVs, tryNames);
+         var foundPrimary = false;
+         var bestItem; // Test [key,value,name] tuples against the NSI matcher until we get a primary match or exhaust all options.
 
-               if (v !== undefined || tags.hasOwnProperty(k)) {
-                 tags[k] = v;
-               }
-             }
+         for (var i = 0; i < tuples.length && !foundPrimary; i++) {
+           var tuple = tuples[i];
 
-             tags = utilCleanTags(tags);
+           var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n, loc); // Attempt to match an item in NSI
 
-             if (!fastDeepEqual(entity.tags, tags)) {
-               actions.push(actionChangeTags(entityID, tags));
-             }
-           }
 
-           if (actions.length) {
-             var combinedAction = function combinedAction(graph) {
-               actions.forEach(function (action) {
-                 graph = action(graph);
-               });
-               return graph;
-             };
+           if (!hits || !hits.length) continue; // no match, try next tuple
 
-             var annotation = _t('operations.change_tags.annotation');
+           if (hits[0].match !== 'primary' && hits[0].match !== 'alternate') break; // a generic match, stop looking
+           // A match may contain multiple results, the first one is likely the best one for this location
+           // e.g. `['pfk-a54c14', 'kfc-1ff19c', 'kfc-658eea']`
 
-             if (_coalesceChanges) {
-               context.overwrite(combinedAction, annotation);
-             } else {
-               context.perform(combinedAction, annotation);
-               _coalesceChanges = false;
+           for (var j = 0; j < hits.length; j++) {
+             var hit = hits[j];
+             var isPrimary = hits[j].match === 'primary';
+             var itemID = hit.itemID;
+             if (_nsi.dissolved[itemID]) continue; // Don't upgrade to a dissolved item
+
+             var item = _nsi.ids.get(itemID);
+
+             if (!item) continue;
+             var mainTag = item.mainTag; // e.g. `brand:wikidata`
+
+             var itemQID = item.tags[mainTag]; // e.g. `brand:wikidata` qid
+
+             var notQID = newTags["not:".concat(mainTag)]; // e.g. `not:brand:wikidata` qid
+
+             if ( // Exceptions, skip this hit
+             !itemQID || itemQID === notQID || // No `*:wikidata` or matched a `not:*:wikidata`
+             newTags.office && !item.tags.office // feature may be a corporate office for a brand? - #6416
+             ) {
+               continue; // continue looking
+             } // If we get here, the hit is good..
+
+
+             if (!bestItem || isPrimary) {
+               bestItem = item;
+
+               if (isPrimary) {
+                 foundPrimary = true;
+               }
+
+               break; // can ignore the rest of the hits from this match
              }
            }
+         } // At this point we have matched a canonical item and can suggest tag upgrades..
 
-           context.validator().validate();
-         }
 
-         entityEditor.modified = function (val) {
-           if (!arguments.length) return _modified;
-           _modified = val;
-           return entityEditor;
-         };
+         if (bestItem) {
+           var _ret = function () {
+             var itemID = bestItem.id;
+             var item = JSON.parse(JSON.stringify(bestItem)); // deep copy
 
-         entityEditor.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           return entityEditor;
-         };
+             var tkv = item.tkv;
+             var parts = tkv.split('/', 3); // tkv = "tree/key/value"
 
-         entityEditor.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           if (val && _entityIDs && utilArrayIdentical(_entityIDs, val)) return entityEditor; // exit early if no change
+             var k = parts[1];
+             var v = parts[2];
+             var category = _nsi.data[tkv];
+             var properties = category.properties || {}; // Preserve some tags that we specifically don't want NSI to overwrite. ('^name', sometimes)
 
-           _entityIDs = val;
-           _base = context.graph();
-           _coalesceChanges = false;
-           loadActivePresets(true);
-           return entityEditor.modified(false);
-         };
+             var preserveTags = item.preserveTags || properties.preserveTags || []; // These tags can be toplevel tags -or- attributes - so we generally want to preserve existing values - #8615
+             // We'll only _replace_ the tag value if this tag is the toplevel/defining tag for the matched item (`k`)
 
-         entityEditor.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return entityEditor;
-         };
+             ['building', 'emergency', 'internet_access', 'takeaway'].forEach(function (osmkey) {
+               if (k !== osmkey) preserveTags.push("^".concat(osmkey, "$"));
+             });
+             var regexes = preserveTags.map(function (s) {
+               return new RegExp(s, 'i');
+             });
+             var keepTags = {};
+             Object.keys(newTags).forEach(function (osmkey) {
+               if (regexes.some(function (regex) {
+                 return regex.test(osmkey);
+               })) {
+                 keepTags[osmkey] = newTags[osmkey];
+               }
+             }); // Remove any primary tags ("amenity", "craft", "shop", "man_made", "route", etc) that have a
+             // value like `amenity=yes` or `shop=yes` (exceptions have already been added to `keepTags` above)
 
-         function loadActivePresets(isForNewSelection) {
-           var graph = context.graph();
-           var counts = {};
+             _nsi.kvt.forEach(function (vmap, k) {
+               if (newTags[k] === 'yes') delete newTags[k];
+             }); // Replace mistagged `wikidata`/`wikipedia` with e.g. `brand:wikidata`/`brand:wikipedia`
 
-           for (var i in _entityIDs) {
-             var entity = graph.hasEntity(_entityIDs[i]);
-             if (!entity) return;
-             var match = _mainPresetIndex.match(entity, graph);
-             if (!counts[match.id]) counts[match.id] = 0;
-             counts[match.id] += 1;
-           }
 
-           var matches = Object.keys(counts).sort(function (p1, p2) {
-             return counts[p2] - counts[p1];
-           }).map(function (pID) {
-             return _mainPresetIndex.item(pID);
-           });
+             if (foundQID) {
+               delete newTags.wikipedia;
+               delete newTags.wikidata;
+             } // Do the tag upgrade
 
-           if (!isForNewSelection) {
-             // A "weak" preset doesn't set any tags. (e.g. "Address")
-             var weakPreset = _activePresets.length === 1 && !_activePresets[0].isFallback() && Object.keys(_activePresets[0].addTags || {}).length === 0; // Don't replace a weak preset with a fallback preset (e.g. "Point")
 
-             if (weakPreset && matches.length === 1 && matches[0].isFallback()) return;
-           }
+             Object.assign(newTags, item.tags, keepTags); // Swap `route` back to `route_master` - name-suggestion-index#5184
 
-           entityEditor.presets(matches);
-         }
+             if (isRouteMaster) {
+               newTags.route_master = newTags.route;
+               delete newTags.route;
+             } // Special `branch` splitting rules - IF..
+             // - NSI is suggesting to replace `name`, AND
+             // - `branch` doesn't already contain something, AND
+             // - original name has not moved to an alternate name (e.g. "Dunkin' Donuts" -> "Dunkin'"), AND
+             // - original name is "some name" + "some stuff", THEN
+             // consider splitting `name` into `name`/`branch`..
 
-         entityEditor.presets = function (val) {
-           if (!arguments.length) return _activePresets; // don't reload the same preset
 
-           if (!utilArrayIdentical(val, _activePresets)) {
-             _activePresets = val;
-           }
+             var origName = tags.name;
+             var newName = newTags.name;
 
-           return entityEditor;
-         };
+             if (newName && origName && newName !== origName && !newTags.branch) {
+               var newNames = gatherNames(newTags);
+               var newSet = new Set([].concat(_toConsumableArray(newNames.primary), _toConsumableArray(newNames.alternate)));
+               var isMoved = newSet.has(origName); // another tag holds the original name now
 
-         return utilRebind(entityEditor, dispatch$1, 'on');
-       }
+               if (!isMoved) {
+                 // Test name fragments, longest to shortest, to fit them into a "Name Branch" pattern.
+                 // e.g. "TUI ReiseCenter - Neuss Innenstadt" -> ["TUI", "ReiseCenter", "Neuss", "Innenstadt"]
+                 var nameParts = origName.split(/[\s\-\/,.]/);
 
-       function uiPresetList(context) {
-         var dispatch$1 = dispatch('cancel', 'choose');
+                 for (var split = nameParts.length; split > 0; split--) {
+                   var name = nameParts.slice(0, split).join(' '); // e.g. "TUI ReiseCenter"
 
-         var _entityIDs;
+                   var branch = nameParts.slice(split).join(' '); // e.g. "Neuss Innenstadt"
 
-         var _currentPresets;
+                   var nameHits = _nsi.matcher.match(k, v, name, loc);
 
-         var _autofocus = false;
+                   if (!nameHits || !nameHits.length) continue; // no match, try next name fragment
 
-         function presetList(selection) {
-           if (!_entityIDs) return;
-           var presets = _mainPresetIndex.matchAllGeometry(entityGeometries());
-           selection.html('');
-           var messagewrap = selection.append('div').attr('class', 'header fillL');
-           var message = messagewrap.append('h3').html(_t.html('inspector.choose'));
-           messagewrap.append('button').attr('class', 'preset-choose').on('click', function () {
-             dispatch$1.call('cancel', this);
-           }).call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward'));
+                   if (nameHits.some(function (hit) {
+                     return hit.itemID === itemID;
+                   })) {
+                     // matched the name fragment to the same itemID above
+                     if (branch) {
+                       if (notBranches.test(branch)) {
+                         // "branch" was detected but is noise ("factory outlet", etc)
+                         newTags.name = origName; // Leave `name` alone, this part of the name may be significant..
+                       } else {
+                         var branchHits = _nsi.matcher.match(k, v, branch, loc);
+
+                         if (branchHits && branchHits.length) {
+                           // if "branch" matched something else in NSI..
+                           if (branchHits[0].match === 'primary' || branchHits[0].match === 'alternate') {
+                             // if another brand! (e.g. "KFC - Taco Bell"?)
+                             return {
+                               v: null
+                             }; //   bail out - can't suggest tags in this case
+                           } // else a generic (e.g. "gas", "cafe") - ignore
 
-           function initialKeydown(d3_event) {
-             // hack to let delete shortcut work when search is autofocused
-             if (search.property('value').length === 0 && (d3_event.keyCode === utilKeybinding.keyCodes['⌫'] || d3_event.keyCode === utilKeybinding.keyCodes['⌦'])) {
-               d3_event.preventDefault();
-               d3_event.stopPropagation();
-               operationDelete(context, _entityIDs)(); // hack to let undo work when search is autofocused
-             } else if (search.property('value').length === 0 && (d3_event.ctrlKey || d3_event.metaKey) && d3_event.keyCode === utilKeybinding.keyCodes.z) {
-               d3_event.preventDefault();
-               d3_event.stopPropagation();
-               context.undo();
-             } else if (!d3_event.ctrlKey && !d3_event.metaKey) {
-               // don't check for delete/undo hack on future keydown events
-               select(this).on('keydown', keydown);
-               keydown.call(this, d3_event);
+                         } else {
+                           // "branch" is not noise and not something in NSI
+                           newTags.branch = branch; // Stick it in the `branch` tag..
+                         }
+                       }
+                     }
+
+                     break;
+                   }
+                 }
+               }
              }
-           }
 
-           function keydown(d3_event) {
-             // down arrow
-             if (d3_event.keyCode === utilKeybinding.keyCodes['↓'] && // if insertion point is at the end of the string
-             search.node().selectionStart === search.property('value').length) {
-               d3_event.preventDefault();
-               d3_event.stopPropagation(); // move focus to the first item in the preset list
+             return {
+               v: {
+                 newTags: newTags,
+                 matched: item
+               }
+             };
+           }();
 
-               var buttons = list.selectAll('.preset-list-button');
-               if (!buttons.empty()) buttons.nodes()[0].focus();
-             }
-           }
+           if (_typeof(_ret) === "object") return _ret.v;
+         }
 
-           function keypress(d3_event) {
-             // enter
-             var value = search.property('value');
+         return changed ? {
+           newTags: newTags,
+           matched: null
+         } : null;
+       } // `_isGenericName()`
+       // Is the `name` tag generic?
+       //
+       // Arguments
+       //   `tags`: `Object` containing the feature's OSM tags
+       // Returns
+       //   `true` if it is generic, `false` if not
+       //
 
-             if (d3_event.keyCode === 13 && // ↩ Return
-             value.length) {
-               list.selectAll('.preset-list-item:first-child').each(function (d) {
-                 d.choose.call(this);
-               });
-             }
-           }
 
-           function inputevent() {
-             var value = search.property('value');
-             list.classed('filtered', value.length);
-             var extent = combinedEntityExtent();
-             var results, messageText;
+       function _isGenericName(tags) {
+         var n = tags.name;
+         if (!n) return false; // tryNames just contains the `name` tag value and nothing else
 
-             if (value.length && extent) {
-               var center = extent.center();
-               var countryCode = iso1A2Code(center);
-               results = presets.search(value, entityGeometries()[0], countryCode && countryCode.toLowerCase());
-               messageText = _t('inspector.results', {
-                 n: results.collection.length,
-                 search: value
-               });
-             } else {
-               results = _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro());
-               messageText = _t('inspector.choose');
-             }
+         var tryNames = {
+           primary: new Set([n]),
+           alternate: new Set()
+         }; // Gather key/value tag pairs to try to match
 
-             list.call(drawList, results);
-             message.html(messageText);
-           }
+         var tryKVs = gatherKVs(tags);
+         if (!tryKVs.primary.size && !tryKVs.alternate.size) return false; // Order the [key,value,name] tuples - test primary before alternate
 
-           var searchWrap = selection.append('div').attr('class', 'search-header');
-           searchWrap.call(svgIcon('#iD-icon-search', 'pre-text'));
-           var search = searchWrap.append('input').attr('class', 'preset-search-input').attr('placeholder', _t('inspector.search')).attr('type', 'search').call(utilNoAuto).on('keydown', initialKeydown).on('keypress', keypress).on('input', inputevent);
+         var tuples = gatherTuples(tryKVs, tryNames);
 
-           if (_autofocus) {
-             search.node().focus(); // Safari 14 doesn't always like to focus immediately,
-             // so try again on the next pass
+         for (var i = 0; i < tuples.length; i++) {
+           var tuple = tuples[i];
 
-             setTimeout(function () {
-               search.node().focus();
-             }, 0);
-           }
+           var hits = _nsi.matcher.match(tuple.k, tuple.v, tuple.n); // Attempt to match an item in NSI
+           // If we get a `excludeGeneric` hit, this is a generic name.
 
-           var listWrap = selection.append('div').attr('class', 'inspector-body');
-           var list = listWrap.append('div').attr('class', 'preset-list').call(drawList, _mainPresetIndex.defaults(entityGeometries()[0], 36, !context.inIntro()));
-           context.features().on('change.preset-list', updateForFeatureHiddenState);
+
+           if (hits && hits.length && hits[0].match === 'excludeGeneric') return true;
+         }
+
+         return false;
+       } // PUBLIC INTERFACE
+
+
+       var serviceNsi = {
+         // `init()`
+         // On init, start preparing the name-suggestion-index
+         //
+         init: function init() {
+           // Note: service.init is called immediately after the presetManager has started loading its data.
+           // We expect to chain onto an unfulfilled promise here.
+           setNsiSources();
+           _mainPresetIndex.ensureLoaded().then(function () {
+             return loadNsiPresets();
+           }).then(function () {
+             return delay(100);
+           }) // wait briefly for locationSets to enter the locationManager queue
+           .then(function () {
+             return _mainLocations.mergeLocationSets([]);
+           }) // wait for locationSets to resolve
+           .then(function () {
+             return loadNsiData();
+           }).then(function () {
+             return _nsiStatus = 'ok';
+           })["catch"](function () {
+             return _nsiStatus = 'failed';
+           });
+
+           function delay(msec) {
+             return new Promise(function (resolve) {
+               window.setTimeout(resolve, msec);
+             });
+           }
+         },
+         // `reset()`
+         // Reset is called when user saves data to OSM (does nothing here)
+         //
+         reset: function reset() {},
+         // `status()`
+         // To let other code know how it's going...
+         //
+         // Returns
+         //   `String`: 'loading', 'ok', 'failed'
+         //
+         status: function status() {
+           return _nsiStatus;
+         },
+         // `isGenericName()`
+         // Is the `name` tag generic?
+         //
+         // Arguments
+         //   `tags`: `Object` containing the feature's OSM tags
+         // Returns
+         //   `true` if it is generic, `false` if not
+         //
+         isGenericName: function isGenericName(tags) {
+           return _isGenericName(tags);
+         },
+         // `upgradeTags()`
+         // Suggest tag upgrades.
+         // This function will not modify the input tags, it makes a copy.
+         //
+         // Arguments
+         //   `tags`: `Object` containing the feature's OSM tags
+         //   `loc`: Location where this feature exists, as a [lon, lat]
+         // Returns
+         //   `Object` containing the result, or `null` if no changes needed:
+         //   {
+         //     'newTags': `Object` - The tags the the feature should have
+         //     'matched': `Object` - The matched item
+         //   }
+         //
+         upgradeTags: function upgradeTags(tags, loc) {
+           return _upgradeTags(tags, loc);
+         },
+         // `cache()`
+         // Direct access to the NSI cache, useful for testing or breaking things
+         //
+         // Returns
+         //   `Object`: the internal NSI cache
+         //
+         cache: function cache() {
+           return _nsi;
          }
+       };
 
-         function drawList(list, presets) {
-           presets = presets.matchAllGeometry(entityGeometries());
-           var collection = presets.collection.reduce(function (collection, preset) {
-             if (!preset) return collection;
+       var apibase$1 = 'https://kartaview.org';
+       var maxResults$1 = 1000;
+       var tileZoom$1 = 14;
+       var tiler$3 = utilTiler().zoomExtent([tileZoom$1, tileZoom$1]).skipNullIsland(true);
+       var dispatch$3 = dispatch$8('loadedImages');
+       var imgZoom = d3_zoom().extent([[0, 0], [320, 240]]).translateExtent([[0, 0], [320, 240]]).scaleExtent([1, 15]);
 
-             if (preset.members) {
-               if (preset.members.collection.filter(function (preset) {
-                 return preset.addable();
-               }).length > 1) {
-                 collection.push(CategoryItem(preset));
-               }
-             } else if (preset.addable()) {
-               collection.push(PresetItem(preset));
-             }
+       var _oscCache;
 
-             return collection;
-           }, []);
-           var items = list.selectAll('.preset-list-item').data(collection, function (d) {
-             return d.preset.id;
-           });
-           items.order();
-           items.exit().remove();
-           items.enter().append('div').attr('class', function (item) {
-             return 'preset-list-item preset-' + item.preset.id.replace('/', '-');
-           }).classed('current', function (item) {
-             return _currentPresets.indexOf(item.preset) !== -1;
-           }).each(function (item) {
-             select(this).call(item);
-           }).style('opacity', 0).transition().style('opacity', 1);
-           updateForFeatureHiddenState();
-         }
+       var _oscSelectedImage;
 
-         function itemKeydown(d3_event) {
-           // the actively focused item
-           var item = select(this.closest('.preset-list-item'));
-           var parentItem = select(item.node().parentNode.closest('.preset-list-item')); // arrow down, move focus to the next, lower item
+       var _loadViewerPromise$1;
 
-           if (d3_event.keyCode === utilKeybinding.keyCodes['↓']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation(); // the next item in the list at the same level
+       function abortRequest$3(controller) {
+         controller.abort();
+       }
 
-             var nextItem = select(item.node().nextElementSibling); // if there is no next item in this list
+       function maxPageAtZoom(z) {
+         if (z < 15) return 2;
+         if (z === 15) return 5;
+         if (z === 16) return 10;
+         if (z === 17) return 20;
+         if (z === 18) return 40;
+         if (z > 18) return 80;
+       }
 
-             if (nextItem.empty()) {
-               // if there is a parent item
-               if (!parentItem.empty()) {
-                 // the item is the last item of a sublist,
-                 // select the next item at the parent level
-                 nextItem = select(parentItem.node().nextElementSibling);
-               } // if the focused item is expanded
+       function loadTiles$1(which, url, projection) {
+         var currZoom = Math.floor(geoScaleToZoom(projection.scale()));
+         var tiles = tiler$3.getTiles(projection); // abort inflight requests that are no longer needed
 
-             } else if (select(this).classed('expanded')) {
-               // select the first subitem instead
-               nextItem = item.select('.subgrid .preset-list-item:first-child');
-             }
+         var cache = _oscCache[which];
+         Object.keys(cache.inflight).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k.indexOf(tile.id + ',') === 0;
+           });
 
-             if (!nextItem.empty()) {
-               // focus on the next item
-               nextItem.select('.preset-list-button').node().focus();
-             } // arrow up, move focus to the previous, higher item
+           if (!wanted) {
+             abortRequest$3(cache.inflight[k]);
+             delete cache.inflight[k];
+           }
+         });
+         tiles.forEach(function (tile) {
+           loadNextTilePage$1(which, currZoom, url, tile);
+         });
+       }
 
-           } else if (d3_event.keyCode === utilKeybinding.keyCodes['↑']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation(); // the previous item in the list at the same level
+       function loadNextTilePage$1(which, currZoom, url, tile) {
+         var cache = _oscCache[which];
+         var bbox = tile.extent.bbox();
+         var maxPages = maxPageAtZoom(currZoom);
+         var nextPage = cache.nextPage[tile.id] || 1;
+         var params = utilQsString({
+           ipp: maxResults$1,
+           page: nextPage,
+           // client_id: clientId,
+           bbTopLeft: [bbox.maxY, bbox.minX].join(','),
+           bbBottomRight: [bbox.minY, bbox.maxX].join(',')
+         }, true);
+         if (nextPage > maxPages) return;
+         var id = tile.id + ',' + String(nextPage);
+         if (cache.loaded[id] || cache.inflight[id]) return;
+         var controller = new AbortController();
+         cache.inflight[id] = controller;
+         var options = {
+           method: 'POST',
+           signal: controller.signal,
+           body: params,
+           headers: {
+             'Content-Type': 'application/x-www-form-urlencoded'
+           }
+         };
+         d3_json(url, options).then(function (data) {
+           cache.loaded[id] = true;
+           delete cache.inflight[id];
 
-             var previousItem = select(item.node().previousElementSibling); // if there is no previous item in this list
+           if (!data || !data.currentPageItems || !data.currentPageItems.length) {
+             throw new Error('No Data');
+           }
 
-             if (previousItem.empty()) {
-               // if there is a parent item
-               if (!parentItem.empty()) {
-                 // the item is the first subitem of a sublist select the parent item
-                 previousItem = parentItem;
-               } // if the previous item is expanded
+           var features = data.currentPageItems.map(function (item) {
+             var loc = [+item.lng, +item.lat];
+             var d;
 
-             } else if (previousItem.select('.preset-list-button').classed('expanded')) {
-               // select the last subitem of the sublist of the previous item
-               previousItem = previousItem.select('.subgrid .preset-list-item:last-child');
-             }
+             if (which === 'images') {
+               d = {
+                 loc: loc,
+                 key: item.id,
+                 ca: +item.heading,
+                 captured_at: item.shot_date || item.date_added,
+                 captured_by: item.username,
+                 imagePath: item.lth_name,
+                 sequence_id: item.sequence_id,
+                 sequence_index: +item.sequence_index
+               }; // cache sequence info
 
-             if (!previousItem.empty()) {
-               // focus on the previous item
-               previousItem.select('.preset-list-button').node().focus();
-             } else {
-               // the focus is at the top of the list, move focus back to the search field
-               var search = select(this.closest('.preset-list-pane')).select('.preset-search-input');
-               search.node().focus();
-             } // arrow left, move focus to the parent item if there is one
+               var seq = _oscCache.sequences[d.sequence_id];
 
-           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation(); // if there is a parent item, focus on the parent item
+               if (!seq) {
+                 seq = {
+                   rotation: 0,
+                   images: []
+                 };
+                 _oscCache.sequences[d.sequence_id] = seq;
+               }
 
-             if (!parentItem.empty()) {
-               parentItem.select('.preset-list-button').node().focus();
-             } // arrow right, choose this item
+               seq.images[d.sequence_index] = d;
+               _oscCache.images.forImageKey[d.key] = d; // cache imageKey -> image
+             }
 
-           } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation();
-             item.datum().choose.call(select(this).node());
+             return {
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             };
+           });
+           cache.rtree.load(features);
+
+           if (data.currentPageItems.length === maxResults$1) {
+             // more pages to load
+             cache.nextPage[tile.id] = nextPage + 1;
+             loadNextTilePage$1(which, currZoom, url, tile);
+           } else {
+             cache.nextPage[tile.id] = Infinity; // no more pages to load
            }
-         }
 
-         function CategoryItem(preset) {
-           var box,
-               sublist,
-               shown = false;
+           if (which === 'images') {
+             dispatch$3.call('loadedImages');
+           }
+         })["catch"](function () {
+           cache.loaded[id] = true;
+           delete cache.inflight[id];
+         });
+       } // partition viewport into higher zoom tiles
 
-           function item(selection) {
-             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap category');
 
-             function click() {
-               var isExpanded = select(this).classed('expanded');
-               var iconName = isExpanded ? _mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward' : '#iD-icon-down';
-               select(this).classed('expanded', !isExpanded);
-               select(this).selectAll('div.label-inner svg.icon use').attr('href', iconName);
-               item.choose();
-             }
+       function partitionViewport$1(projection) {
+         var z = geoScaleToZoom(projection.scale());
+         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
-             var geometries = entityGeometries();
-             var button = wrap.append('button').attr('class', 'preset-list-button').classed('expanded', false).call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', click).on('keydown', function (d3_event) {
-               // right arrow, expand the focused item
-               if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '←' : '→']) {
-                 d3_event.preventDefault();
-                 d3_event.stopPropagation(); // if the item isn't expanded
+         var tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // no more than `limit` results per partition.
 
-                 if (!select(this).classed('expanded')) {
-                   // toggle expansion (expand the item)
-                   click.call(this, d3_event);
-                 } // left arrow, collapse the focused item
 
-               } else if (d3_event.keyCode === utilKeybinding.keyCodes[_mainLocalizer.textDirection() === 'rtl' ? '→' : '←']) {
-                 d3_event.preventDefault();
-                 d3_event.stopPropagation(); // if the item is expanded
+       function searchLimited$1(limit, projection, rtree) {
+         limit = limit || 5;
+         return partitionViewport$1(projection).reduce(function (result, extent) {
+           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+             return d.data;
+           });
+           return found.length ? result.concat(found) : result;
+         }, []);
+       }
 
-                 if (select(this).classed('expanded')) {
-                   // toggle expansion (collapse the item)
-                   click.call(this, d3_event);
-                 }
-               } else {
-                 itemKeydown.call(this, d3_event);
-               }
-             });
-             var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
-             label.append('div').attr('class', 'namepart').call(svgIcon(_mainLocalizer.textDirection() === 'rtl' ? '#iD-icon-backward' : '#iD-icon-forward', 'inline')).append('span').html(function () {
-               return preset.nameLabel() + '&hellip;';
-             });
-             box = selection.append('div').attr('class', 'subgrid').style('max-height', '0px').style('opacity', 0);
-             box.append('div').attr('class', 'arrow');
-             sublist = box.append('div').attr('class', 'preset-list fillL3');
+       var serviceKartaview = {
+         init: function init() {
+           if (!_oscCache) {
+             this.reset();
            }
 
-           item.choose = function () {
-             if (!box || !sublist) return;
+           this.event = utilRebind(this, dispatch$3, 'on');
+         },
+         reset: function reset() {
+           if (_oscCache) {
+             Object.values(_oscCache.images.inflight).forEach(abortRequest$3);
+           }
 
-             if (shown) {
-               shown = false;
-               box.transition().duration(200).style('opacity', '0').style('max-height', '0px').style('padding-bottom', '0px');
-             } else {
-               shown = true;
-               var members = preset.members.matchAllGeometry(entityGeometries());
-               sublist.call(drawList, members);
-               box.transition().duration(200).style('opacity', '1').style('max-height', 200 + members.collection.length * 190 + 'px').style('padding-bottom', '10px');
-             }
+           _oscCache = {
+             images: {
+               inflight: {},
+               loaded: {},
+               nextPage: {},
+               rtree: new RBush(),
+               forImageKey: {}
+             },
+             sequences: {}
            };
+           _oscSelectedImage = null;
+         },
+         images: function images(projection) {
+           var limit = 5;
+           return searchLimited$1(limit, projection, _oscCache.images.rtree);
+         },
+         sequences: function sequences(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           var sequenceKeys = {}; // all sequences for images in viewport
 
-           item.preset = preset;
-           return item;
-         }
+           _oscCache.images.rtree.search(bbox).forEach(function (d) {
+             sequenceKeys[d.data.sequence_id] = true;
+           }); // make linestrings from those sequences
 
-         function PresetItem(preset) {
-           function item(selection) {
-             var wrap = selection.append('div').attr('class', 'preset-list-button-wrap');
-             var geometries = entityGeometries();
-             var button = wrap.append('button').attr('class', 'preset-list-button').call(uiPresetIcon().geometry(geometries.length === 1 && geometries[0]).preset(preset)).on('click', item.choose).on('keydown', itemKeydown);
-             var label = button.append('div').attr('class', 'label').append('div').attr('class', 'label-inner');
-             var nameparts = [preset.nameLabel(), preset.subtitleLabel()].filter(Boolean);
-             label.selectAll('.namepart').data(nameparts).enter().append('div').attr('class', 'namepart').html(function (d) {
-               return d;
-             });
-             wrap.call(item.reference.button);
-             selection.call(item.reference.body);
-           }
 
-           item.choose = function () {
-             if (select(this).classed('disabled')) return;
+           var lineStrings = [];
+           Object.keys(sequenceKeys).forEach(function (sequenceKey) {
+             var seq = _oscCache.sequences[sequenceKey];
+             var images = seq && seq.images;
 
-             if (!context.inIntro()) {
-               _mainPresetIndex.setMostRecent(preset, entityGeometries()[0]);
+             if (images) {
+               lineStrings.push({
+                 type: 'LineString',
+                 coordinates: images.map(function (d) {
+                   return d.loc;
+                 }).filter(Boolean),
+                 properties: {
+                   captured_at: images[0] ? images[0].captured_at : null,
+                   captured_by: images[0] ? images[0].captured_by : null,
+                   key: sequenceKey
+                 }
+               });
              }
+           });
+           return lineStrings;
+         },
+         cachedImage: function cachedImage(imageKey) {
+           return _oscCache.images.forImageKey[imageKey];
+         },
+         loadImages: function loadImages(projection) {
+           var url = apibase$1 + '/1.0/list/nearby-photos/';
+           loadTiles$1('images', url, projection);
+         },
+         ensureViewerLoaded: function ensureViewerLoaded(context) {
+           if (_loadViewerPromise$1) return _loadViewerPromise$1; // add kartaview-wrapper
 
-             context.perform(function (graph) {
-               for (var i in _entityIDs) {
-                 var entityID = _entityIDs[i];
-                 var oldPreset = _mainPresetIndex.match(graph.entity(entityID), graph);
-                 graph = actionChangePreset(entityID, oldPreset, preset)(graph);
-               }
+           var wrap = context.container().select('.photoviewer').selectAll('.kartaview-wrapper').data([0]);
+           var that = this;
+           var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper kartaview-wrapper').classed('hide', true).call(imgZoom.on('zoom', zoomPan)).on('dblclick.zoom', null);
+           wrapEnter.append('div').attr('class', 'photo-attribution fillD');
+           var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+           controlsEnter.append('button').on('click.back', step(-1)).text('◄');
+           controlsEnter.append('button').on('click.rotate-ccw', rotate(-90)).text('⤿');
+           controlsEnter.append('button').on('click.rotate-cw', rotate(90)).text('⤾');
+           controlsEnter.append('button').on('click.forward', step(1)).text('►');
+           wrapEnter.append('div').attr('class', 'kartaview-image-wrap'); // Register viewer resize handler
 
-               return graph;
-             }, _t('operations.change_tags.annotation'));
-             context.validator().validate(); // rerun validation
+           context.ui().photoviewer.on('resize.kartaview', function (dimensions) {
+             imgZoom = d3_zoom().extent([[0, 0], dimensions]).translateExtent([[0, 0], dimensions]).scaleExtent([1, 15]).on('zoom', zoomPan);
+           });
 
-             dispatch$1.call('choose', this, preset);
-           };
+           function zoomPan(d3_event) {
+             var t = d3_event.transform;
+             context.container().select('.photoviewer .kartaview-image-wrap').call(utilSetTransform, t.x, t.y, t.k);
+           }
 
-           item.help = function (d3_event) {
-             d3_event.stopPropagation();
-             item.reference.toggle();
-           };
+           function rotate(deg) {
+             return function () {
+               if (!_oscSelectedImage) return;
+               var sequenceKey = _oscSelectedImage.sequence_id;
+               var sequence = _oscCache.sequences[sequenceKey];
+               if (!sequence) return;
+               var r = sequence.rotation || 0;
+               r += deg;
+               if (r > 180) r -= 360;
+               if (r < -180) r += 360;
+               sequence.rotation = r;
+               var wrap = context.container().select('.photoviewer .kartaview-wrapper');
+               wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+               wrap.selectAll('.kartaview-image').transition().duration(100).style('transform', 'rotate(' + r + 'deg)');
+             };
+           }
 
-           item.preset = preset;
-           item.reference = uiTagReference(preset.reference());
-           return item;
-         }
+           function step(stepBy) {
+             return function () {
+               if (!_oscSelectedImage) return;
+               var sequenceKey = _oscSelectedImage.sequence_id;
+               var sequence = _oscCache.sequences[sequenceKey];
+               if (!sequence) return;
+               var nextIndex = _oscSelectedImage.sequence_index + stepBy;
+               var nextImage = sequence.images[nextIndex];
+               if (!nextImage) return;
+               context.map().centerEase(nextImage.loc);
+               that.selectImage(context, nextImage.key);
+             };
+           } // don't need any async loading so resolve immediately
 
-         function updateForFeatureHiddenState() {
-           if (!_entityIDs.every(context.hasEntity)) return;
-           var geometries = entityGeometries();
-           var button = context.container().selectAll('.preset-list .preset-list-button'); // remove existing tooltips
 
-           button.call(uiTooltip().destroyAny);
-           button.each(function (item, index) {
-             var hiddenPresetFeaturesId;
+           _loadViewerPromise$1 = Promise.resolve();
+           return _loadViewerPromise$1;
+         },
+         showViewer: function showViewer(context) {
+           var viewer = context.container().select('.photoviewer').classed('hide', false);
+           var isHidden = viewer.selectAll('.photo-wrapper.kartaview-wrapper.hide').size();
 
-             for (var i in geometries) {
-               hiddenPresetFeaturesId = context.features().isHiddenPreset(item.preset, geometries[i]);
-               if (hiddenPresetFeaturesId) break;
-             }
+           if (isHidden) {
+             viewer.selectAll('.photo-wrapper:not(.kartaview-wrapper)').classed('hide', true);
+             viewer.selectAll('.photo-wrapper.kartaview-wrapper').classed('hide', false);
+           }
 
-             var isHiddenPreset = !context.inIntro() && !!hiddenPresetFeaturesId && (_currentPresets.length !== 1 || item.preset !== _currentPresets[0]);
-             select(this).classed('disabled', isHiddenPreset);
+           return this;
+         },
+         hideViewer: function hideViewer(context) {
+           _oscSelectedImage = null;
+           this.updateUrlImage(null);
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(null);
+           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+           context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+           return this.setStyles(context, null, true);
+         },
+         selectImage: function selectImage(context, imageKey) {
+           var d = this.cachedImage(imageKey);
+           _oscSelectedImage = d;
+           this.updateUrlImage(imageKey);
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(d);
+           this.setStyles(context, null, true);
+           context.container().selectAll('.icon-sign').classed('currentView', false);
+           if (!d) return this;
+           var wrap = context.container().select('.photoviewer .kartaview-wrapper');
+           var imageWrap = wrap.selectAll('.kartaview-image-wrap');
+           var attribution = wrap.selectAll('.photo-attribution').text('');
+           wrap.transition().duration(100).call(imgZoom.transform, identity$2);
+           imageWrap.selectAll('.kartaview-image').remove();
 
-             if (isHiddenPreset) {
-               var isAutoHidden = context.features().autoHidden(hiddenPresetFeaturesId);
-               select(this).call(uiTooltip().title(_t.html('inspector.hidden_preset.' + (isAutoHidden ? 'zoom' : 'manual'), {
-                 features: _t.html('feature.' + hiddenPresetFeaturesId + '.description')
-               })).placement(index < 2 ? 'bottom' : 'top'));
+           if (d) {
+             var sequence = _oscCache.sequences[d.sequence_id];
+             var r = sequence && sequence.rotation || 0;
+             imageWrap.append('img').attr('class', 'kartaview-image').attr('src', apibase$1 + '/' + d.imagePath).style('transform', 'rotate(' + r + 'deg)');
+
+             if (d.captured_by) {
+               attribution.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://kartaview.org/user/' + encodeURIComponent(d.captured_by)).text('@' + d.captured_by);
+               attribution.append('span').text('|');
              }
-           });
-         }
 
-         presetList.autofocus = function (val) {
-           if (!arguments.length) return _autofocus;
-           _autofocus = val;
-           return presetList;
-         };
+             if (d.captured_at) {
+               attribution.append('span').attr('class', 'captured_at').text(localeDateString(d.captured_at));
+               attribution.append('span').text('|');
+             }
 
-         presetList.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
+             attribution.append('a').attr('class', 'image-link').attr('target', '_blank').attr('href', 'https://kartaview.org/details/' + d.sequence_id + '/' + d.sequence_index).text('kartaview.org');
+           }
 
-           if (_entityIDs && _entityIDs.length) {
-             var presets = _entityIDs.map(function (entityID) {
-               return _mainPresetIndex.match(context.entity(entityID), context.graph());
-             });
+           return this;
+
+           function localeDateString(s) {
+             if (!s) return null;
+             var options = {
+               day: 'numeric',
+               month: 'short',
+               year: 'numeric'
+             };
+             var d = new Date(s);
+             if (isNaN(d.getTime())) return null;
+             return d.toLocaleDateString(_mainLocalizer.localeCode(), options);
+           }
+         },
+         getSelectedImage: function getSelectedImage() {
+           return _oscSelectedImage;
+         },
+         getSequenceKeyForImage: function getSequenceKeyForImage(d) {
+           return d && d.sequence_id;
+         },
+         // Updates the currently highlighted sequence and selected bubble.
+         // Reset is only necessary when interacting with the viewport because
+         // this implicitly changes the currently selected bubble/sequence
+         setStyles: function setStyles(context, hovered, reset) {
+           if (reset) {
+             // reset all layers
+             context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+             context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+           }
+
+           var hoveredImageKey = hovered && hovered.key;
+           var hoveredSequenceKey = this.getSequenceKeyForImage(hovered);
+           var hoveredSequence = hoveredSequenceKey && _oscCache.sequences[hoveredSequenceKey];
+           var hoveredImageKeys = hoveredSequence && hoveredSequence.images.map(function (d) {
+             return d.key;
+           }) || [];
+           var viewer = context.container().select('.photoviewer');
+           var selected = viewer.empty() ? undefined : viewer.datum();
+           var selectedImageKey = selected && selected.key;
+           var selectedSequenceKey = this.getSequenceKeyForImage(selected);
+           var selectedSequence = selectedSequenceKey && _oscCache.sequences[selectedSequenceKey];
+           var selectedImageKeys = selectedSequence && selectedSequence.images.map(function (d) {
+             return d.key;
+           }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
 
-             presetList.presets(presets);
-           }
+           var highlightedImageKeys = utilArrayUnion(hoveredImageKeys, selectedImageKeys);
+           context.container().selectAll('.layer-kartaview .viewfield-group').classed('highlighted', function (d) {
+             return highlightedImageKeys.indexOf(d.key) !== -1;
+           }).classed('hovered', function (d) {
+             return d.key === hoveredImageKey;
+           }).classed('currentView', function (d) {
+             return d.key === selectedImageKey;
+           });
+           context.container().selectAll('.layer-kartaview .sequence').classed('highlighted', function (d) {
+             return d.properties.key === hoveredSequenceKey;
+           }).classed('currentView', function (d) {
+             return d.properties.key === selectedSequenceKey;
+           }); // update viewfields if needed
 
-           return presetList;
-         };
+           context.container().selectAll('.layer-kartaview .viewfield-group .viewfield').attr('d', viewfieldPath);
 
-         presetList.presets = function (val) {
-           if (!arguments.length) return _currentPresets;
-           _currentPresets = val;
-           return presetList;
-         };
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;
 
-         function entityGeometries() {
-           var counts = {};
+             if (d.pano && d.key !== selectedImageKey) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+             }
+           }
 
-           for (var i in _entityIDs) {
-             var entityID = _entityIDs[i];
-             var entity = context.entity(entityID);
-             var geometry = entity.geometry(context.graph()); // Treat entities on addr:interpolation lines as points, not vertices (#3241)
+           return this;
+         },
+         updateUrlImage: function updateUrlImage(imageKey) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
 
-             if (geometry === 'vertex' && entity.isOnAddressLine(context.graph())) {
-               geometry = 'point';
+             if (imageKey) {
+               hash.photo = 'kartaview/' + imageKey;
+             } else {
+               delete hash.photo;
              }
 
-             if (!counts[geometry]) counts[geometry] = 0;
-             counts[geometry] += 1;
+             window.location.replace('#' + utilQsString(hash, true));
            }
-
-           return Object.keys(counts).sort(function (geom1, geom2) {
-             return counts[geom2] - counts[geom1];
-           });
+         },
+         cache: function cache() {
+           return _oscCache;
          }
+       };
 
-         function combinedEntityExtent() {
-           return _entityIDs.reduce(function (extent, entityID) {
-             var entity = context.graph().entity(entityID);
-             return extent.extend(entity.extent(context.graph()));
-           }, geoExtent());
-         }
+       var hashes$1 = {exports: {}};
 
-         return utilRebind(presetList, dispatch$1, 'on');
-       }
+       (function (module, exports) {
+         (function () {
+           var Hashes;
 
-       function uiInspector(context) {
-         var presetList = uiPresetList(context);
-         var entityEditor = uiEntityEditor(context);
-         var wrap = select(null),
-             presetPane = select(null),
-             editorPane = select(null);
-         var _state = 'select';
+           function utf8Encode(str) {
+             var x,
+                 y,
+                 output = '',
+                 i = -1,
+                 l;
 
-         var _entityIDs;
+             if (str && str.length) {
+               l = str.length;
 
-         var _newFeature = false;
+               while ((i += 1) < l) {
+                 /* Decode utf-16 surrogate pairs */
+                 x = str.charCodeAt(i);
+                 y = i + 1 < l ? str.charCodeAt(i + 1) : 0;
 
-         function inspector(selection) {
-           presetList.entityIDs(_entityIDs).autofocus(_newFeature).on('choose', inspector.setPreset).on('cancel', function () {
-             inspector.setPreset();
-           });
-           entityEditor.state(_state).entityIDs(_entityIDs).on('choose', inspector.showList);
-           wrap = selection.selectAll('.panewrap').data([0]);
-           var enter = wrap.enter().append('div').attr('class', 'panewrap');
-           enter.append('div').attr('class', 'preset-list-pane pane');
-           enter.append('div').attr('class', 'entity-editor-pane pane');
-           wrap = wrap.merge(enter);
-           presetPane = wrap.selectAll('.preset-list-pane');
-           editorPane = wrap.selectAll('.entity-editor-pane');
+                 if (0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF) {
+                   x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+                   i += 1;
+                 }
+                 /* Encode output as utf-8 */
 
-           function shouldDefaultToPresetList() {
-             // always show the inspector on hover
-             if (_state !== 'select') return false; // can only change preset on single selection
 
-             if (_entityIDs.length !== 1) return false;
-             var entityID = _entityIDs[0];
-             var entity = context.hasEntity(entityID);
-             if (!entity) return false; // default to inspector if there are already tags
+                 if (x <= 0x7F) {
+                   output += String.fromCharCode(x);
+                 } else if (x <= 0x7FF) {
+                   output += String.fromCharCode(0xC0 | x >>> 6 & 0x1F, 0x80 | x & 0x3F);
+                 } else if (x <= 0xFFFF) {
+                   output += String.fromCharCode(0xE0 | x >>> 12 & 0x0F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+                 } else if (x <= 0x1FFFFF) {
+                   output += String.fromCharCode(0xF0 | x >>> 18 & 0x07, 0x80 | x >>> 12 & 0x3F, 0x80 | x >>> 6 & 0x3F, 0x80 | x & 0x3F);
+                 }
+               }
+             }
 
-             if (entity.hasNonGeometryTags()) return false; // prompt to select preset if feature is new and untagged
+             return output;
+           }
 
-             if (_newFeature) return true; // all existing features except vertices should default to inspector
+           function utf8Decode(str) {
+             var i,
+                 ac,
+                 c1,
+                 c2,
+                 c3,
+                 arr = [],
+                 l;
+             i = ac = c1 = c2 = c3 = 0;
 
-             if (entity.geometry(context.graph()) !== 'vertex') return false; // show vertex relations if any
+             if (str && str.length) {
+               l = str.length;
+               str += '';
 
-             if (context.graph().parentRelations(entity).length) return false; // show vertex issues if there are any
+               while (i < l) {
+                 c1 = str.charCodeAt(i);
+                 ac += 1;
 
-             if (context.validator().getEntityIssues(entityID).length) return false; // show turn retriction editor for junction vertices
+                 if (c1 < 128) {
+                   arr[ac] = String.fromCharCode(c1);
+                   i += 1;
+                 } else if (c1 > 191 && c1 < 224) {
+                   c2 = str.charCodeAt(i + 1);
+                   arr[ac] = String.fromCharCode((c1 & 31) << 6 | c2 & 63);
+                   i += 2;
+                 } else {
+                   c2 = str.charCodeAt(i + 1);
+                   c3 = str.charCodeAt(i + 2);
+                   arr[ac] = String.fromCharCode((c1 & 15) << 12 | (c2 & 63) << 6 | c3 & 63);
+                   i += 3;
+                 }
+               }
+             }
 
-             if (entity.isHighwayIntersection(context.graph())) return false; // otherwise show preset list for uninteresting vertices
+             return arr.join('');
+           }
+           /**
+            * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+            * to work around bugs in some JS interpreters.
+            */
 
-             return true;
+
+           function safe_add(x, y) {
+             var lsw = (x & 0xFFFF) + (y & 0xFFFF),
+                 msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+             return msw << 16 | lsw & 0xFFFF;
            }
+           /**
+            * Bitwise rotate a 32-bit number to the left.
+            */
 
-           if (shouldDefaultToPresetList()) {
-             wrap.style('right', '-100%');
-             editorPane.classed('hide', true);
-             presetPane.classed('hide', false).call(presetList);
-           } else {
-             wrap.style('right', '0%');
-             presetPane.classed('hide', true);
-             editorPane.classed('hide', false).call(entityEditor);
+
+           function bit_rol(num, cnt) {
+             return num << cnt | num >>> 32 - cnt;
            }
+           /**
+            * Convert a raw string to a hex string
+            */
 
-           var footer = selection.selectAll('.footer').data([0]);
-           footer = footer.enter().append('div').attr('class', 'footer').merge(footer);
-           footer.call(uiViewOnOSM(context).what(context.hasEntity(_entityIDs.length === 1 && _entityIDs[0])));
-         }
 
-         inspector.showList = function (presets) {
-           presetPane.classed('hide', false);
-           wrap.transition().styleTween('right', function () {
-             return interpolate('0%', '-100%');
-           }).on('end', function () {
-             editorPane.classed('hide', true);
-           });
+           function rstr2hex(input, hexcase) {
+             var hex_tab = hexcase ? '0123456789ABCDEF' : '0123456789abcdef',
+                 output = '',
+                 x,
+                 i = 0,
+                 l = input.length;
 
-           if (presets) {
-             presetList.presets(presets);
+             for (; i < l; i += 1) {
+               x = input.charCodeAt(i);
+               output += hex_tab.charAt(x >>> 4 & 0x0F) + hex_tab.charAt(x & 0x0F);
+             }
+
+             return output;
            }
+           /**
+            * Convert an array of big-endian words to a string
+            */
 
-           presetPane.call(presetList.autofocus(true));
-         };
 
-         inspector.setPreset = function (preset) {
-           // upon setting multipolygon, go to the area preset list instead of the editor
-           if (preset && preset.id === 'type/multipolygon') {
-             presetPane.call(presetList.autofocus(true));
-           } else {
-             editorPane.classed('hide', false);
-             wrap.transition().styleTween('right', function () {
-               return interpolate('-100%', '0%');
-             }).on('end', function () {
-               presetPane.classed('hide', true);
-             });
+           function binb2rstr(input) {
+             var i,
+                 l = input.length * 32,
+                 output = '';
 
-             if (preset) {
-               entityEditor.presets([preset]);
+             for (i = 0; i < l; i += 8) {
+               output += String.fromCharCode(input[i >> 5] >>> 24 - i % 32 & 0xFF);
              }
 
-             editorPane.call(entityEditor);
+             return output;
            }
-         };
+           /**
+            * Convert an array of little-endian words to a string
+            */
 
-         inspector.state = function (val) {
-           if (!arguments.length) return _state;
-           _state = val;
-           entityEditor.state(_state); // remove any old field help overlay that might have gotten attached to the inspector
 
-           context.container().selectAll('.field-help-body').remove();
-           return inspector;
-         };
+           function binl2rstr(input) {
+             var i,
+                 l = input.length * 32,
+                 output = '';
 
-         inspector.entityIDs = function (val) {
-           if (!arguments.length) return _entityIDs;
-           _entityIDs = val;
-           return inspector;
-         };
+             for (i = 0; i < l; i += 8) {
+               output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+             }
 
-         inspector.newFeature = function (val) {
-           if (!arguments.length) return _newFeature;
-           _newFeature = val;
-           return inspector;
-         };
+             return output;
+           }
+           /**
+            * Convert a raw string to an array of little-endian words
+            * Characters >255 have their high-byte silently ignored.
+            */
 
-         return inspector;
-       }
 
-       function uiSidebar(context) {
-         var inspector = uiInspector(context);
-         var dataEditor = uiDataEditor(context);
-         var noteEditor = uiNoteEditor(context);
-         var improveOsmEditor = uiImproveOsmEditor(context);
-         var keepRightEditor = uiKeepRightEditor(context);
-         var osmoseEditor = uiOsmoseEditor(context);
+           function rstr2binl(input) {
+             var i,
+                 l = input.length * 8,
+                 output = Array(input.length >> 2),
+                 lo = output.length;
 
-         var _current;
+             for (i = 0; i < lo; i += 1) {
+               output[i] = 0;
+             }
 
-         var _wasData = false;
-         var _wasNote = false;
-         var _wasQaItem = false; // use pointer events on supported platforms; fallback to mouse events
+             for (i = 0; i < l; i += 8) {
+               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << i % 32;
+             }
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+             return output;
+           }
+           /**
+            * Convert a raw string to an array of big-endian words
+            * Characters >255 have their high-byte silently ignored.
+            */
 
-         function sidebar(selection) {
-           var container = context.container();
-           var minWidth = 240;
-           var sidebarWidth;
-           var containerWidth;
-           var dragOffset; // Set the initial width constraints
 
-           selection.style('min-width', minWidth + 'px').style('max-width', '400px').style('width', '33.3333%');
-           var resizer = selection.append('div').attr('class', 'sidebar-resizer').on(_pointerPrefix + 'down.sidebar-resizer', pointerdown);
-           var downPointerId, lastClientX, containerLocGetter;
+           function rstr2binb(input) {
+             var i,
+                 l = input.length * 8,
+                 output = Array(input.length >> 2),
+                 lo = output.length;
 
-           function pointerdown(d3_event) {
-             if (downPointerId) return;
-             if ('button' in d3_event && d3_event.button !== 0) return;
-             downPointerId = d3_event.pointerId || 'mouse';
-             lastClientX = d3_event.clientX;
-             containerLocGetter = utilFastMouse(container.node()); // offset from edge of sidebar-resizer
+             for (i = 0; i < lo; i += 1) {
+               output[i] = 0;
+             }
 
-             dragOffset = utilFastMouse(resizer.node())(d3_event)[0] - 1;
-             sidebarWidth = selection.node().getBoundingClientRect().width;
-             containerWidth = container.node().getBoundingClientRect().width;
-             var widthPct = sidebarWidth / containerWidth * 100;
-             selection.style('width', widthPct + '%') // lock in current width
-             .style('max-width', '85%'); // but allow larger widths
+             for (i = 0; i < l; i += 8) {
+               output[i >> 5] |= (input.charCodeAt(i / 8) & 0xFF) << 24 - i % 32;
+             }
 
-             resizer.classed('dragging', true);
-             select(window).on('touchmove.sidebar-resizer', function (d3_event) {
-               // disable page scrolling while resizing on touch input
-               d3_event.preventDefault();
-             }, {
-               passive: false
-             }).on(_pointerPrefix + 'move.sidebar-resizer', pointermove).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', pointerup);
+             return output;
            }
+           /**
+            * Convert a raw string to an arbitrary string encoding
+            */
 
-           function pointermove(d3_event) {
-             if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
-             d3_event.preventDefault();
-             var dx = d3_event.clientX - lastClientX;
-             lastClientX = d3_event.clientX;
-             var isRTL = _mainLocalizer.textDirection() === 'rtl';
-             var scaleX = isRTL ? 0 : 1;
-             var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
-             var x = containerLocGetter(d3_event)[0] - dragOffset;
-             sidebarWidth = isRTL ? containerWidth - x : x;
-             var isCollapsed = selection.classed('collapsed');
-             var shouldCollapse = sidebarWidth < minWidth;
-             selection.classed('collapsed', shouldCollapse);
 
-             if (shouldCollapse) {
-               if (!isCollapsed) {
-                 selection.style(xMarginProperty, '-400px').style('width', '400px');
-                 context.ui().onResize([(sidebarWidth - dx) * scaleX, 0]);
-               }
-             } else {
-               var widthPct = sidebarWidth / containerWidth * 100;
-               selection.style(xMarginProperty, null).style('width', widthPct + '%');
+           function rstr2any(input, encoding) {
+             var divisor = encoding.length,
+                 remainders = Array(),
+                 i,
+                 q,
+                 x,
+                 ld,
+                 quotient,
+                 dividend,
+                 output,
+                 full_length;
+             /* Convert to an array of 16-bit big-endian values, forming the dividend */
 
-               if (isCollapsed) {
-                 context.ui().onResize([-sidebarWidth * scaleX, 0]);
-               } else {
-                 context.ui().onResize([-dx * scaleX, 0]);
-               }
-             }
-           }
+             dividend = Array(Math.ceil(input.length / 2));
+             ld = dividend.length;
 
-           function pointerup(d3_event) {
-             if (downPointerId !== (d3_event.pointerId || 'mouse')) return;
-             downPointerId = null;
-             resizer.classed('dragging', false);
-             select(window).on('touchmove.sidebar-resizer', null).on(_pointerPrefix + 'move.sidebar-resizer', null).on(_pointerPrefix + 'up.sidebar-resizer pointercancel.sidebar-resizer', null);
-           }
+             for (i = 0; i < ld; i += 1) {
+               dividend[i] = input.charCodeAt(i * 2) << 8 | input.charCodeAt(i * 2 + 1);
+             }
+             /**
+              * Repeatedly perform a long division. The binary array forms the dividend,
+              * the length of the encoding is the divisor. Once computed, the quotient
+              * forms the dividend for the next step. We stop when the dividend is zerHashes.
+              * All remainders are stored for later use.
+              */
 
-           var featureListWrap = selection.append('div').attr('class', 'feature-list-pane').call(uiFeatureList(context));
-           var inspectorWrap = selection.append('div').attr('class', 'inspector-hidden inspector-wrap');
 
-           var hoverModeSelect = function hoverModeSelect(targets) {
-             context.container().selectAll('.feature-list-item button').classed('hover', false);
+             while (dividend.length > 0) {
+               quotient = Array();
+               x = 0;
 
-             if (context.selectedIDs().length > 1 && targets && targets.length) {
-               var elements = context.container().selectAll('.feature-list-item button').filter(function (node) {
-                 return targets.indexOf(node) !== -1;
-               });
+               for (i = 0; i < dividend.length; i += 1) {
+                 x = (x << 16) + dividend[i];
+                 q = Math.floor(x / divisor);
+                 x -= q * divisor;
 
-               if (!elements.empty()) {
-                 elements.classed('hover', true);
+                 if (quotient.length > 0 || q > 0) {
+                   quotient[quotient.length] = q;
+                 }
                }
+
+               remainders[remainders.length] = x;
+               dividend = quotient;
              }
-           };
+             /* Convert the remainders to the output string */
 
-           sidebar.hoverModeSelect = throttle(hoverModeSelect, 200);
 
-           function hover(targets) {
-             var datum = targets && targets.length && targets[0];
+             output = '';
 
-             if (datum && datum.__featurehash__) {
-               // hovering on data
-               _wasData = true;
-               sidebar.show(dataEditor.datum(datum));
-               selection.selectAll('.sidebar-component').classed('inspector-hover', true);
-             } else if (datum instanceof osmNote) {
-               if (context.mode().id === 'drag-note') return;
-               _wasNote = true;
-               var osm = services.osm;
+             for (i = remainders.length - 1; i >= 0; i--) {
+               output += encoding.charAt(remainders[i]);
+             }
+             /* Append leading zero equivalents */
 
-               if (osm) {
-                 datum = osm.getNote(datum.id); // marker may contain stale data - get latest
-               }
 
-               sidebar.show(noteEditor.note(datum));
-               selection.selectAll('.sidebar-component').classed('inspector-hover', true);
-             } else if (datum instanceof QAItem) {
-               _wasQaItem = true;
-               var errService = services[datum.service];
+             full_length = Math.ceil(input.length * 8 / (Math.log(encoding.length) / Math.log(2)));
 
-               if (errService) {
-                 // marker may contain stale data - get latest
-                 datum = errService.getError(datum.id);
-               } // Currently only three possible services
+             for (i = output.length; i < full_length; i += 1) {
+               output = encoding[0] + output;
+             }
 
+             return output;
+           }
+           /**
+            * Convert a raw string to a base-64 string
+            */
 
-               var errEditor;
 
-               if (datum.service === 'keepRight') {
-                 errEditor = keepRightEditor;
-               } else if (datum.service === 'osmose') {
-                 errEditor = osmoseEditor;
-               } else {
-                 errEditor = improveOsmEditor;
-               }
+           function rstr2b64(input, b64pad) {
+             var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+                 output = '',
+                 len = input.length,
+                 i,
+                 j,
+                 triplet;
+             b64pad = b64pad || '=';
 
-               context.container().selectAll('.qaItem.' + datum.service).classed('hover', function (d) {
-                 return d.id === datum.id;
-               });
-               sidebar.show(errEditor.error(datum));
-               selection.selectAll('.sidebar-component').classed('inspector-hover', true);
-             } else if (!_current && datum instanceof osmEntity) {
-               featureListWrap.classed('inspector-hidden', true);
-               inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', true);
+             for (i = 0; i < len; i += 3) {
+               triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
 
-               if (!inspector.entityIDs() || !utilArrayIdentical(inspector.entityIDs(), [datum.id]) || inspector.state() !== 'hover') {
-                 inspector.state('hover').entityIDs([datum.id]).newFeature(false);
-                 inspectorWrap.call(inspector);
+               for (j = 0; j < 4; j += 1) {
+                 if (i * 8 + j * 6 > input.length * 8) {
+                   output += b64pad;
+                 } else {
+                   output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+                 }
                }
-             } else if (!_current) {
-               featureListWrap.classed('inspector-hidden', false);
-               inspectorWrap.classed('inspector-hidden', true);
-               inspector.state('hide');
-             } else if (_wasData || _wasNote || _wasQaItem) {
-               _wasNote = false;
-               _wasData = false;
-               _wasQaItem = false;
-               context.container().selectAll('.note').classed('hover', false);
-               context.container().selectAll('.qaItem').classed('hover', false);
-               sidebar.hide();
              }
+
+             return output;
            }
 
-           sidebar.hover = throttle(hover, 200);
+           Hashes = {
+             /**
+              * @property {String} version
+              * @readonly
+              */
+             VERSION: '1.0.6',
 
-           sidebar.intersects = function (extent) {
-             var rect = selection.node().getBoundingClientRect();
-             return extent.intersects([context.projection.invert([0, rect.height]), context.projection.invert([rect.width, 0])]);
-           };
+             /**
+              * @member Hashes
+              * @class Base64
+              * @constructor
+              */
+             Base64: function Base64() {
+               // private properties
+               var tab = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/',
+                   pad = '=',
+                   // URL encoding support @todo
+               utf8 = true; // by default enable UTF-8 support encoding
+               // public method for encoding
 
-           sidebar.select = function (ids, newFeature) {
-             sidebar.hide();
+               this.encode = function (input) {
+                 var i,
+                     j,
+                     triplet,
+                     output = '',
+                     len = input.length;
+                 pad = pad || '=';
+                 input = utf8 ? utf8Encode(input) : input;
 
-             if (ids && ids.length) {
-               var entity = ids.length === 1 && context.entity(ids[0]);
+                 for (i = 0; i < len; i += 3) {
+                   triplet = input.charCodeAt(i) << 16 | (i + 1 < len ? input.charCodeAt(i + 1) << 8 : 0) | (i + 2 < len ? input.charCodeAt(i + 2) : 0);
 
-               if (entity && newFeature && selection.classed('collapsed')) {
-                 // uncollapse the sidebar
-                 var extent = entity.extent(context.graph());
-                 sidebar.expand(sidebar.intersects(extent));
-               }
+                   for (j = 0; j < 4; j += 1) {
+                     if (i * 8 + j * 6 > len * 8) {
+                       output += pad;
+                     } else {
+                       output += tab.charAt(triplet >>> 6 * (3 - j) & 0x3F);
+                     }
+                   }
+                 }
 
-               featureListWrap.classed('inspector-hidden', true);
-               inspectorWrap.classed('inspector-hidden', false).classed('inspector-hover', false); // reload the UI even if the ids are the same since the entities
-               // themselves may have changed
+                 return output;
+               }; // public method for decoding
 
-               inspector.state('select').entityIDs(ids).newFeature(newFeature);
-               inspectorWrap.call(inspector);
-             } else {
-               inspector.state('hide');
-             }
-           };
 
-           sidebar.showPresetList = function () {
-             inspector.showList();
-           };
+               this.decode = function (input) {
+                 // var b64 = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+                 var i,
+                     o1,
+                     o2,
+                     o3,
+                     h1,
+                     h2,
+                     h3,
+                     h4,
+                     bits,
+                     ac,
+                     dec = '',
+                     arr = [];
 
-           sidebar.show = function (component, element) {
-             featureListWrap.classed('inspector-hidden', true);
-             inspectorWrap.classed('inspector-hidden', true);
-             if (_current) _current.remove();
-             _current = selection.append('div').attr('class', 'sidebar-component').call(component, element);
-           };
+                 if (!input) {
+                   return input;
+                 }
 
-           sidebar.hide = function () {
-             featureListWrap.classed('inspector-hidden', false);
-             inspectorWrap.classed('inspector-hidden', true);
-             if (_current) _current.remove();
-             _current = null;
-           };
+                 i = ac = 0;
+                 input = input.replace(new RegExp('\\' + pad, 'gi'), ''); // use '='
+                 //input += '';
 
-           sidebar.expand = function (moveMap) {
-             if (selection.classed('collapsed')) {
-               sidebar.toggle(moveMap);
-             }
-           };
+                 do {
+                   // unpack four hexets into three octets using index points in b64
+                   h1 = tab.indexOf(input.charAt(i += 1));
+                   h2 = tab.indexOf(input.charAt(i += 1));
+                   h3 = tab.indexOf(input.charAt(i += 1));
+                   h4 = tab.indexOf(input.charAt(i += 1));
+                   bits = h1 << 18 | h2 << 12 | h3 << 6 | h4;
+                   o1 = bits >> 16 & 0xff;
+                   o2 = bits >> 8 & 0xff;
+                   o3 = bits & 0xff;
+                   ac += 1;
 
-           sidebar.collapse = function (moveMap) {
-             if (!selection.classed('collapsed')) {
-               sidebar.toggle(moveMap);
-             }
-           };
+                   if (h3 === 64) {
+                     arr[ac] = String.fromCharCode(o1);
+                   } else if (h4 === 64) {
+                     arr[ac] = String.fromCharCode(o1, o2);
+                   } else {
+                     arr[ac] = String.fromCharCode(o1, o2, o3);
+                   }
+                 } while (i < input.length);
 
-           sidebar.toggle = function (moveMap) {
-             // Don't allow sidebar to toggle when the user is in the walkthrough.
-             if (context.inIntro()) return;
-             var isCollapsed = selection.classed('collapsed');
-             var isCollapsing = !isCollapsed;
-             var isRTL = _mainLocalizer.textDirection() === 'rtl';
-             var scaleX = isRTL ? 0 : 1;
-             var xMarginProperty = isRTL ? 'margin-right' : 'margin-left';
-             sidebarWidth = selection.node().getBoundingClientRect().width; // switch from % to px
+                 dec = arr.join('');
+                 dec = utf8 ? utf8Decode(dec) : dec;
+                 return dec;
+               }; // set custom pad string
 
-             selection.style('width', sidebarWidth + 'px');
-             var startMargin, endMargin, lastMargin;
 
-             if (isCollapsing) {
-               startMargin = lastMargin = 0;
-               endMargin = -sidebarWidth;
-             } else {
-               startMargin = lastMargin = -sidebarWidth;
-               endMargin = 0;
-             }
+               this.setPad = function (str) {
+                 pad = str || pad;
+                 return this;
+               }; // set custom tab string characters
 
-             if (!isCollapsing) {
-               // unhide the sidebar's content before it transitions onscreen
-               selection.classed('collapsed', isCollapsing);
-             }
 
-             selection.transition().style(xMarginProperty, endMargin + 'px').tween('panner', function () {
-               var i = d3_interpolateNumber(startMargin, endMargin);
-               return function (t) {
-                 var dx = lastMargin - Math.round(i(t));
-                 lastMargin = lastMargin - dx;
-                 context.ui().onResize(moveMap ? undefined : [dx * scaleX, 0]);
+               this.setTab = function (str) {
+                 tab = str || tab;
+                 return this;
                };
-             }).on('end', function () {
-               if (isCollapsing) {
-                 // hide the sidebar's content after it transitions offscreen
-                 selection.classed('collapsed', isCollapsing);
-               } // switch back from px to %
 
+               this.setUTF8 = function (bool) {
+                 if (typeof bool === 'boolean') {
+                   utf8 = bool;
+                 }
 
-               if (!isCollapsing) {
-                 var containerWidth = container.node().getBoundingClientRect().width;
-                 var widthPct = sidebarWidth / containerWidth * 100;
-                 selection.style(xMarginProperty, null).style('width', widthPct + '%');
-               }
-             });
-           }; // toggle the sidebar collapse when double-clicking the resizer
+                 return this;
+               };
+             },
 
+             /**
+              * CRC-32 calculation
+              * @member Hashes
+              * @method CRC32
+              * @static
+              * @param {String} str Input String
+              * @return {String}
+              */
+             CRC32: function CRC32(str) {
+               var crc = 0,
+                   x = 0,
+                   y = 0,
+                   table,
+                   i,
+                   iTop;
+               str = utf8Encode(str);
+               table = ['00000000 77073096 EE0E612C 990951BA 076DC419 706AF48F E963A535 9E6495A3 0EDB8832 ', '79DCB8A4 E0D5E91E 97D2D988 09B64C2B 7EB17CBD E7B82D07 90BF1D91 1DB71064 6AB020F2 F3B97148 ', '84BE41DE 1ADAD47D 6DDDE4EB F4D4B551 83D385C7 136C9856 646BA8C0 FD62F97A 8A65C9EC 14015C4F ', '63066CD9 FA0F3D63 8D080DF5 3B6E20C8 4C69105E D56041E4 A2677172 3C03E4D1 4B04D447 D20D85FD ', 'A50AB56B 35B5A8FA 42B2986C DBBBC9D6 ACBCF940 32D86CE3 45DF5C75 DCD60DCF ABD13D59 26D930AC ', '51DE003A C8D75180 BFD06116 21B4F4B5 56B3C423 CFBA9599 B8BDA50F 2802B89E 5F058808 C60CD9B2 ', 'B10BE924 2F6F7C87 58684C11 C1611DAB B6662D3D 76DC4190 01DB7106 98D220BC EFD5102A 71B18589 ', '06B6B51F 9FBFE4A5 E8B8D433 7807C9A2 0F00F934 9609A88E E10E9818 7F6A0DBB 086D3D2D 91646C97 ', 'E6635C01 6B6B51F4 1C6C6162 856530D8 F262004E 6C0695ED 1B01A57B 8208F4C1 F50FC457 65B0D9C6 ', '12B7E950 8BBEB8EA FCB9887C 62DD1DDF 15DA2D49 8CD37CF3 FBD44C65 4DB26158 3AB551CE A3BC0074 ', 'D4BB30E2 4ADFA541 3DD895D7 A4D1C46D D3D6F4FB 4369E96A 346ED9FC AD678846 DA60B8D0 44042D73 ', '33031DE5 AA0A4C5F DD0D7CC9 5005713C 270241AA BE0B1010 C90C2086 5768B525 206F85B3 B966D409 ', 'CE61E49F 5EDEF90E 29D9C998 B0D09822 C7D7A8B4 59B33D17 2EB40D81 B7BD5C3B C0BA6CAD EDB88320 ', '9ABFB3B6 03B6E20C 74B1D29A EAD54739 9DD277AF 04DB2615 73DC1683 E3630B12 94643B84 0D6D6A3E ', '7A6A5AA8 E40ECF0B 9309FF9D 0A00AE27 7D079EB1 F00F9344 8708A3D2 1E01F268 6906C2FE F762575D ', '806567CB 196C3671 6E6B06E7 FED41B76 89D32BE0 10DA7A5A 67DD4ACC F9B9DF6F 8EBEEFF9 17B7BE43 ', '60B08ED5 D6D6A3E8 A1D1937E 38D8C2C4 4FDFF252 D1BB67F1 A6BC5767 3FB506DD 48B2364B D80D2BDA ', 'AF0A1B4C 36034AF6 41047A60 DF60EFC3 A867DF55 316E8EEF 4669BE79 CB61B38C BC66831A 256FD2A0 ', '5268E236 CC0C7795 BB0B4703 220216B9 5505262F C5BA3BBE B2BD0B28 2BB45A92 5CB36A04 C2D7FFA7 ', 'B5D0CF31 2CD99E8B 5BDEAE1D 9B64C2B0 EC63F226 756AA39C 026D930A 9C0906A9 EB0E363F 72076785 ', '05005713 95BF4A82 E2B87A14 7BB12BAE 0CB61B38 92D28E9B E5D5BE0D 7CDCEFB7 0BDBDF21 86D3D2D4 ', 'F1D4E242 68DDB3F8 1FDA836E 81BE16CD F6B9265B 6FB077E1 18B74777 88085AE6 FF0F6A70 66063BCA ', '11010B5C 8F659EFF F862AE69 616BFFD3 166CCF45 A00AE278 D70DD2EE 4E048354 3903B3C2 A7672661 ', 'D06016F7 4969474D 3E6E77DB AED16A4A D9D65ADC 40DF0B66 37D83BF0 A9BCAE53 DEBB9EC5 47B2CF7F ', '30B5FFE9 BDBDF21C CABAC28A 53B39330 24B4A3A6 BAD03605 CDD70693 54DE5729 23D967BF B3667A2E ', 'C4614AB8 5D681B02 2A6F2B94 B40BBE37 C30C8EA1 5A05DF1B 2D02EF8D'].join('');
+               crc = crc ^ -1;
 
-           resizer.on('dblclick', function (d3_event) {
-             d3_event.preventDefault();
+               for (i = 0, iTop = str.length; i < iTop; i += 1) {
+                 y = (crc ^ str.charCodeAt(i)) & 0xFF;
+                 x = '0x' + table.substr(y * 9, 8);
+                 crc = crc >>> 8 ^ x;
+               } // always return a positive number (that's what >>> 0 does)
 
-             if (d3_event.sourceEvent) {
-               d3_event.sourceEvent.preventDefault();
-             }
 
-             sidebar.toggle();
-           }); // ensure hover sidebar is closed when zooming out beyond editable zoom
+               return (crc ^ -1) >>> 0;
+             },
 
-           context.map().on('crossEditableZoom.sidebar', function (within) {
-             if (!within && !selection.select('.inspector-hover').empty()) {
-               hover([]);
-             }
-           });
-         }
+             /**
+              * @member Hashes
+              * @class MD5
+              * @constructor
+              * @param {Object} [config]
+              *
+              * A JavaScript implementation of the RSA Data Security, Inc. MD5 Message
+              * Digest Algorithm, as defined in RFC 1321.
+              * Version 2.2 Copyright (C) Paul Johnston 1999 - 2009
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See <http://pajhome.org.uk/crypt/md5> for more infHashes.
+              */
+             MD5: function MD5(options) {
+               /**
+                * Private config properties. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+                */
+               var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+                   // hexadecimal output case format. false - lowercase; true - uppercase
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+                   // base-64 pad character. Defaults to '=' for strict RFC compliance
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+               // privileged (public) methods
 
-         sidebar.showPresetList = function () {};
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s), hexcase);
+               };
 
-         sidebar.hover = function () {};
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-         sidebar.hover.cancel = function () {};
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-         sidebar.intersects = function () {};
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-         sidebar.select = function () {};
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d), hexcase);
+               };
 
-         sidebar.show = function () {};
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-         sidebar.hide = function () {};
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                */
 
-         sidebar.expand = function () {};
 
-         sidebar.collapse = function () {};
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * Enable/disable uppercase hexadecimal returned string
+                * @param {Boolean}
+                * @return {Object} this
+                */
 
-         sidebar.toggle = function () {};
 
-         return sidebar;
-       }
+               this.setUpperCase = function (a) {
+                 if (typeof a === 'boolean') {
+                   hexcase = a;
+                 }
 
-       function uiSourceSwitch(context) {
-         var keys;
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {String} Pad
+                * @return {Object} this
+                */
 
-         function click(d3_event) {
-           d3_event.preventDefault();
-           var osm = context.connection();
-           if (!osm) return;
-           if (context.inIntro()) return;
-           if (context.history().hasChanges() && !window.confirm(_t('source_switch.lose_changes'))) return;
-           var isLive = select(this).classed('live');
-           isLive = !isLive;
-           context.enter(modeBrowse(context));
-           context.history().clearSaved(); // remove saved history
 
-           context.flush(); // remove stored data
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {Boolean}
+                * @return {Object} [this]
+                */
 
-           select(this).html(isLive ? _t.html('source_switch.live') : _t.html('source_switch.dev')).classed('live', isLive).classed('chip', isLive);
-           osm["switch"](isLive ? keys[0] : keys[1]); // switch connection (warning: dispatches 'change' event)
-         }
 
-         var sourceSwitch = function sourceSwitch(selection) {
-           selection.append('a').attr('href', '#').html(_t.html('source_switch.live')).attr('class', 'live chip').on('click', click);
-         };
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-         sourceSwitch.keys = function (_) {
-           if (!arguments.length) return keys;
-           keys = _;
-           return sourceSwitch;
-         };
+                 return this;
+               }; // private methods
 
-         return sourceSwitch;
-       }
+               /**
+                * Calculate the MD5 of a raw string
+                */
 
-       function uiSpinner(context) {
-         var osm = context.connection();
-         return function (selection) {
-           var img = selection.append('img').attr('src', context.imagePath('loader-black.gif')).style('opacity', 0);
 
-           if (osm) {
-             osm.on('loading.spinner', function () {
-               img.transition().style('opacity', 1);
-             }).on('loaded.spinner', function () {
-               img.transition().style('opacity', 0);
-             });
-           }
-         };
-       }
+               function rstr(s) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binl2rstr(binl(rstr2binl(s), s.length * 8));
+               }
+               /**
+                * Calculate the HMAC-MD5, of a key and some data (raw strings)
+                */
 
-       function uiSplash(context) {
-         return function (selection) {
-           // Exception - if there are restorable changes, skip this splash screen.
-           // This is because we currently only support one `uiModal` at a time
-           //  and we need to show them `uiRestore`` instead of this one.
-           if (context.history().hasRestorableChanges()) return; // If user has not seen this version of the privacy policy, show the splash again.
 
-           var updateMessage = '';
-           var sawPrivacyVersion = corePreferences('sawPrivacyVersion');
-           var showSplash = !corePreferences('sawSplash');
+               function rstr_hmac(key, data) {
+                 var bkey, ipad, opad, hash, i;
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 bkey = rstr2binl(key);
 
-           if (sawPrivacyVersion !== context.privacyVersion) {
-             updateMessage = _t('splash.privacy_update');
-             showSplash = true;
-           }
+                 if (bkey.length > 16) {
+                   bkey = binl(bkey, key.length * 8);
+                 }
 
-           if (!showSplash) return;
-           corePreferences('sawSplash', true);
-           corePreferences('sawPrivacyVersion', context.privacyVersion); // fetch intro graph data now, while user is looking at the splash screen
+                 ipad = Array(16), opad = Array(16);
 
-           _mainFileFetcher.get('intro_graph');
-           var modalSelection = uiModal(selection);
-           modalSelection.select('.modal').attr('class', 'modal-splash modal');
-           var introModal = modalSelection.select('.content').append('div').attr('class', 'fillL');
-           introModal.append('div').attr('class', 'modal-section').append('h3').html(_t.html('splash.welcome'));
-           var modalSection = introModal.append('div').attr('class', 'modal-section');
-           modalSection.append('p').html(_t.html('splash.text', {
-             version: context.version,
-             website: '<a target="_blank" href="http://ideditor.blog/">ideditor.blog</a>',
-             github: '<a target="_blank" href="https://github.com/openstreetmap/iD">github.com</a>'
-           }));
-           modalSection.append('p').html(_t.html('splash.privacy', {
-             updateMessage: updateMessage,
-             privacyLink: '<a target="_blank" href="https://github.com/openstreetmap/iD/blob/release/PRIVACY.md">' + _t('splash.privacy_policy') + '</a>'
-           }));
-           var buttonWrap = introModal.append('div').attr('class', 'modal-actions');
-           var walkthrough = buttonWrap.append('button').attr('class', 'walkthrough').on('click', function () {
-             context.container().call(uiIntro(context));
-             modalSelection.close();
-           });
-           walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
-           walkthrough.append('div').html(_t.html('splash.walkthrough'));
-           var startEditing = buttonWrap.append('button').attr('class', 'start-editing').on('click', modalSelection.close);
-           startEditing.append('svg').attr('class', 'logo logo-features').append('use').attr('xlink:href', '#iD-logo-features');
-           startEditing.append('div').html(_t.html('splash.start'));
-           modalSelection.select('button.close').attr('class', 'hide');
-         };
-       }
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-       function uiStatus(context) {
-         var osm = context.connection();
-         return function (selection) {
-           if (!osm) return;
+                 hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+                 return binl2rstr(binl(opad.concat(hash), 512 + 128));
+               }
+               /**
+                * Calculate the MD5 of an array of little-endian words, and a bit length.
+                */
 
-           function update(err, apiStatus) {
-             selection.html('');
 
-             if (err) {
-               if (apiStatus === 'connectionSwitched') {
-                 // if the connection was just switched, we can't rely on
-                 // the status (we're getting the status of the previous api)
-                 return;
-               } else if (apiStatus === 'rateLimited') {
-                 selection.html(_t.html('osm_api_status.message.rateLimit')).append('a').attr('href', '#').attr('class', 'api-status-login').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('login')).on('click.login', function (d3_event) {
-                   d3_event.preventDefault();
-                   osm.authenticate();
-                 });
-               } else {
-                 // don't allow retrying too rapidly
-                 var throttledRetry = throttle(function () {
-                   // try loading the visible tiles
-                   context.loadTiles(context.projection); // manually reload the status too in case all visible tiles were already loaded
+               function binl(x, len) {
+                 var i,
+                     olda,
+                     oldb,
+                     oldc,
+                     oldd,
+                     a = 1732584193,
+                     b = -271733879,
+                     c = -1732584194,
+                     d = 271733878;
+                 /* append padding */
 
-                   osm.reloadApiStatus();
-                 }, 2000); // eslint-disable-next-line no-warning-comments
-                 // TODO: nice messages for different error types
+                 x[len >> 5] |= 0x80 << len % 32;
+                 x[(len + 64 >>> 9 << 4) + 14] = len;
 
+                 for (i = 0; i < x.length; i += 16) {
+                   olda = a;
+                   oldb = b;
+                   oldc = c;
+                   oldd = d;
+                   a = md5_ff(a, b, c, d, x[i + 0], 7, -680876936);
+                   d = md5_ff(d, a, b, c, x[i + 1], 12, -389564586);
+                   c = md5_ff(c, d, a, b, x[i + 2], 17, 606105819);
+                   b = md5_ff(b, c, d, a, x[i + 3], 22, -1044525330);
+                   a = md5_ff(a, b, c, d, x[i + 4], 7, -176418897);
+                   d = md5_ff(d, a, b, c, x[i + 5], 12, 1200080426);
+                   c = md5_ff(c, d, a, b, x[i + 6], 17, -1473231341);
+                   b = md5_ff(b, c, d, a, x[i + 7], 22, -45705983);
+                   a = md5_ff(a, b, c, d, x[i + 8], 7, 1770035416);
+                   d = md5_ff(d, a, b, c, x[i + 9], 12, -1958414417);
+                   c = md5_ff(c, d, a, b, x[i + 10], 17, -42063);
+                   b = md5_ff(b, c, d, a, x[i + 11], 22, -1990404162);
+                   a = md5_ff(a, b, c, d, x[i + 12], 7, 1804603682);
+                   d = md5_ff(d, a, b, c, x[i + 13], 12, -40341101);
+                   c = md5_ff(c, d, a, b, x[i + 14], 17, -1502002290);
+                   b = md5_ff(b, c, d, a, x[i + 15], 22, 1236535329);
+                   a = md5_gg(a, b, c, d, x[i + 1], 5, -165796510);
+                   d = md5_gg(d, a, b, c, x[i + 6], 9, -1069501632);
+                   c = md5_gg(c, d, a, b, x[i + 11], 14, 643717713);
+                   b = md5_gg(b, c, d, a, x[i + 0], 20, -373897302);
+                   a = md5_gg(a, b, c, d, x[i + 5], 5, -701558691);
+                   d = md5_gg(d, a, b, c, x[i + 10], 9, 38016083);
+                   c = md5_gg(c, d, a, b, x[i + 15], 14, -660478335);
+                   b = md5_gg(b, c, d, a, x[i + 4], 20, -405537848);
+                   a = md5_gg(a, b, c, d, x[i + 9], 5, 568446438);
+                   d = md5_gg(d, a, b, c, x[i + 14], 9, -1019803690);
+                   c = md5_gg(c, d, a, b, x[i + 3], 14, -187363961);
+                   b = md5_gg(b, c, d, a, x[i + 8], 20, 1163531501);
+                   a = md5_gg(a, b, c, d, x[i + 13], 5, -1444681467);
+                   d = md5_gg(d, a, b, c, x[i + 2], 9, -51403784);
+                   c = md5_gg(c, d, a, b, x[i + 7], 14, 1735328473);
+                   b = md5_gg(b, c, d, a, x[i + 12], 20, -1926607734);
+                   a = md5_hh(a, b, c, d, x[i + 5], 4, -378558);
+                   d = md5_hh(d, a, b, c, x[i + 8], 11, -2022574463);
+                   c = md5_hh(c, d, a, b, x[i + 11], 16, 1839030562);
+                   b = md5_hh(b, c, d, a, x[i + 14], 23, -35309556);
+                   a = md5_hh(a, b, c, d, x[i + 1], 4, -1530992060);
+                   d = md5_hh(d, a, b, c, x[i + 4], 11, 1272893353);
+                   c = md5_hh(c, d, a, b, x[i + 7], 16, -155497632);
+                   b = md5_hh(b, c, d, a, x[i + 10], 23, -1094730640);
+                   a = md5_hh(a, b, c, d, x[i + 13], 4, 681279174);
+                   d = md5_hh(d, a, b, c, x[i + 0], 11, -358537222);
+                   c = md5_hh(c, d, a, b, x[i + 3], 16, -722521979);
+                   b = md5_hh(b, c, d, a, x[i + 6], 23, 76029189);
+                   a = md5_hh(a, b, c, d, x[i + 9], 4, -640364487);
+                   d = md5_hh(d, a, b, c, x[i + 12], 11, -421815835);
+                   c = md5_hh(c, d, a, b, x[i + 15], 16, 530742520);
+                   b = md5_hh(b, c, d, a, x[i + 2], 23, -995338651);
+                   a = md5_ii(a, b, c, d, x[i + 0], 6, -198630844);
+                   d = md5_ii(d, a, b, c, x[i + 7], 10, 1126891415);
+                   c = md5_ii(c, d, a, b, x[i + 14], 15, -1416354905);
+                   b = md5_ii(b, c, d, a, x[i + 5], 21, -57434055);
+                   a = md5_ii(a, b, c, d, x[i + 12], 6, 1700485571);
+                   d = md5_ii(d, a, b, c, x[i + 3], 10, -1894986606);
+                   c = md5_ii(c, d, a, b, x[i + 10], 15, -1051523);
+                   b = md5_ii(b, c, d, a, x[i + 1], 21, -2054922799);
+                   a = md5_ii(a, b, c, d, x[i + 8], 6, 1873313359);
+                   d = md5_ii(d, a, b, c, x[i + 15], 10, -30611744);
+                   c = md5_ii(c, d, a, b, x[i + 6], 15, -1560198380);
+                   b = md5_ii(b, c, d, a, x[i + 13], 21, 1309151649);
+                   a = md5_ii(a, b, c, d, x[i + 4], 6, -145523070);
+                   d = md5_ii(d, a, b, c, x[i + 11], 10, -1120210379);
+                   c = md5_ii(c, d, a, b, x[i + 2], 15, 718787259);
+                   b = md5_ii(b, c, d, a, x[i + 9], 21, -343485551);
+                   a = safe_add(a, olda);
+                   b = safe_add(b, oldb);
+                   c = safe_add(c, oldc);
+                   d = safe_add(d, oldd);
+                 }
 
-                 selection.html(_t.html('osm_api_status.message.error') + ' ').append('a').attr('href', '#') // let the user manually retry their connection directly
-                 .html(_t.html('osm_api_status.retry')).on('click.retry', function (d3_event) {
-                   d3_event.preventDefault();
-                   throttledRetry();
-                 });
+                 return Array(a, b, c, d);
                }
-             } else if (apiStatus === 'readonly') {
-               selection.html(_t.html('osm_api_status.message.readonly'));
-             } else if (apiStatus === 'offline') {
-               selection.html(_t.html('osm_api_status.message.offline'));
-             }
-
-             selection.attr('class', 'api-status ' + (err ? 'error' : apiStatus));
-           }
-
-           osm.on('apiStatusChange.uiStatus', update); // reload the status periodically regardless of other factors
-
-           window.setInterval(function () {
-             osm.reloadApiStatus();
-           }, 90000); // load the initial status in case no OSM data was loaded yet
-
-           osm.reloadApiStatus();
-         };
-       }
+               /**
+                * These functions implement the four basic operations the algorithm uses.
+                */
 
-       function modeDrawArea(context, wayID, startGraph, button) {
-         var mode = {
-           button: button,
-           id: 'draw-area'
-         };
-         var behavior = behaviorDrawWay(context, wayID, mode, startGraph).on('rejectedSelfIntersection.modeDrawArea', function () {
-           context.ui().flash.iconName('#iD-icon-no').label(_t('self_intersection.error.areas'))();
-         });
-         mode.wayID = wayID;
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+               function md5_cmn(q, a, b, x, s, t) {
+                 return safe_add(bit_rol(safe_add(safe_add(a, q), safe_add(x, t)), s), b);
+               }
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               function md5_ff(a, b, c, d, x, s, t) {
+                 return md5_cmn(b & c | ~b & d, a, b, x, s, t);
+               }
 
-         mode.selectedIDs = function () {
-           return [wayID];
-         };
+               function md5_gg(a, b, c, d, x, s, t) {
+                 return md5_cmn(b & d | c & ~d, a, b, x, s, t);
+               }
 
-         mode.activeID = function () {
-           return behavior && behavior.activeID() || [];
-         };
+               function md5_hh(a, b, c, d, x, s, t) {
+                 return md5_cmn(b ^ c ^ d, a, b, x, s, t);
+               }
 
-         return mode;
-       }
+               function md5_ii(a, b, c, d, x, s, t) {
+                 return md5_cmn(c ^ (b | ~d), a, b, x, s, t);
+               }
+             },
 
-       function modeAddArea(context, mode) {
-         mode.id = 'add-area';
-         var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
-         var defaultTags = {
-           area: 'yes'
-         };
-         if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'area');
+             /**
+              * @member Hashes
+              * @class Hashes.SHA1
+              * @param {Object} [config]
+              * @constructor
+              *
+              * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined in FIPS 180-1
+              * Version 2.2 Copyright Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              */
+             SHA1: function SHA1(options) {
+               /**
+                * Private config properties. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * See {@link Hashes.MD5#method-setUpperCase} and {@link Hashes.SHA1#method-setUpperCase}
+                */
+               var hexcase = options && typeof options.uppercase === 'boolean' ? options.uppercase : false,
+                   // hexadecimal output case format. false - lowercase; true - uppercase
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
+                   // base-64 pad character. Defaults to '=' for strict RFC compliance
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true; // enable/disable utf8 encoding
+               // public methods
 
-         function actionClose(wayId) {
-           return function (graph) {
-             return graph.replace(graph.entity(wayId).close());
-           };
-         }
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s), hexcase);
+               };
 
-         function start(loc) {
-           var startGraph = context.graph();
-           var node = osmNode({
-             loc: loc
-           });
-           var way = osmWay({
-             tags: defaultTags
-           });
-           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
-           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
-         }
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-         function startFromWay(loc, edge) {
-           var startGraph = context.graph();
-           var node = osmNode({
-             loc: loc
-           });
-           var way = osmWay({
-             tags: defaultTags
-           });
-           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id), actionAddMidpoint({
-             loc: loc,
-             edge: edge
-           }, node));
-           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
-         }
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-         function startFromNode(node) {
-           var startGraph = context.graph();
-           var way = osmWay({
-             tags: defaultTags
-           });
-           context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id), actionClose(way.id));
-           context.enter(modeDrawArea(context, way.id, startGraph, mode.button));
-         }
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-         return mode;
-       }
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                * @public
+                */
 
-       function modeAddLine(context, mode) {
-         mode.id = 'add-line';
-         var behavior = behaviorAddWay(context).on('start', start).on('startFromWay', startFromWay).on('startFromNode', startFromNode);
-         var defaultTags = {};
-         if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'line');
 
-         function start(loc) {
-           var startGraph = context.graph();
-           var node = osmNode({
-             loc: loc
-           });
-           var way = osmWay({
-             tags: defaultTags
-           });
-           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id));
-           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
-         }
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-         function startFromWay(loc, edge) {
-           var startGraph = context.graph();
-           var node = osmNode({
-             loc: loc
-           });
-           var way = osmWay({
-             tags: defaultTags
-           });
-           context.perform(actionAddEntity(node), actionAddEntity(way), actionAddVertex(way.id, node.id), actionAddMidpoint({
-             loc: loc,
-             edge: edge
-           }, node));
-           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
-         }
 
-         function startFromNode(node) {
-           var startGraph = context.graph();
-           var way = osmWay({
-             tags: defaultTags
-           });
-           context.perform(actionAddEntity(way), actionAddVertex(way.id, node.id));
-           context.enter(modeDrawLine(context, way.id, startGraph, mode.button));
-         }
+               this.setUpperCase = function (a) {
+                 if (typeof a === 'boolean') {
+                   hexcase = a;
+                 }
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
 
-         return mode;
-       }
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-       function modeAddPoint(context, mode) {
-         mode.id = 'add-point';
-         var behavior = behaviorDraw(context).on('click', add).on('clickWay', addWay).on('clickNode', addNode).on('cancel', cancel).on('finish', cancel);
-         var defaultTags = {};
-         if (mode.preset) defaultTags = mode.preset.setTags(defaultTags, 'point');
 
-         function add(loc) {
-           var node = osmNode({
-             loc: loc,
-             tags: defaultTags
-           });
-           context.perform(actionAddEntity(node), _t('operations.add.annotation.point'));
-           enterSelectMode(node);
-         }
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-         function addWay(loc, edge) {
-           var node = osmNode({
-             tags: defaultTags
-           });
-           context.perform(actionAddMidpoint({
-             loc: loc,
-             edge: edge
-           }, node), _t('operations.add.annotation.vertex'));
-           enterSelectMode(node);
-         }
+                 return this;
+               }; // private methods
 
-         function enterSelectMode(node) {
-           context.enter(modeSelect(context, [node.id]).newFeature(true));
-         }
+               /**
+                * Calculate the SHA-512 of a raw string
+                */
 
-         function addNode(node) {
-           if (Object.keys(defaultTags).length === 0) {
-             enterSelectMode(node);
-             return;
-           }
 
-           var tags = Object.assign({}, node.tags); // shallow copy
+               function rstr(s) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
+               }
+               /**
+                * Calculate the HMAC-SHA1 of a key and some data (raw strings)
+                */
 
-           for (var key in defaultTags) {
-             tags[key] = defaultTags[key];
-           }
 
-           context.perform(actionChangeTags(node.id, tags), _t('operations.add.annotation.point'));
-           enterSelectMode(node);
-         }
+               function rstr_hmac(key, data) {
+                 var bkey, ipad, opad, i, hash;
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 bkey = rstr2binb(key);
 
-         function cancel() {
-           context.enter(modeBrowse(context));
-         }
+                 if (bkey.length > 16) {
+                   bkey = binb(bkey, key.length * 8);
+                 }
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+                 ipad = Array(16), opad = Array(16);
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-         return mode;
-       }
+                 hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+                 return binb2rstr(binb(opad.concat(hash), 512 + 160));
+               }
+               /**
+                * Calculate the SHA-1 of an array of big-endian words, and a bit length
+                */
 
-       function modeAddNote(context) {
-         var mode = {
-           id: 'add-note',
-           button: 'note',
-           description: _t.html('modes.add_note.description'),
-           key: _t('modes.add_note.key')
-         };
-         var behavior = behaviorDraw(context).on('click', add).on('cancel', cancel).on('finish', cancel);
 
-         function add(loc) {
-           var osm = services.osm;
-           if (!osm) return;
-           var note = osmNote({
-             loc: loc,
-             status: 'open',
-             comments: []
-           });
-           osm.replaceNote(note); // force a reraw (there is no history change that would otherwise do this)
+               function binb(x, len) {
+                 var i,
+                     j,
+                     t,
+                     olda,
+                     oldb,
+                     oldc,
+                     oldd,
+                     olde,
+                     w = Array(80),
+                     a = 1732584193,
+                     b = -271733879,
+                     c = -1732584194,
+                     d = 271733878,
+                     e = -1009589776;
+                 /* append padding */
 
-           context.map().pan([0, 0]);
-           context.selectedNoteID(note.id).enter(modeSelectNote(context, note.id).newFeature(true));
-         }
+                 x[len >> 5] |= 0x80 << 24 - len % 32;
+                 x[(len + 64 >> 9 << 4) + 15] = len;
 
-         function cancel() {
-           context.enter(modeBrowse(context));
-         }
+                 for (i = 0; i < x.length; i += 16) {
+                   olda = a;
+                   oldb = b;
+                   oldc = c;
+                   oldd = d;
+                   olde = e;
 
-         mode.enter = function () {
-           context.install(behavior);
-         };
+                   for (j = 0; j < 80; j += 1) {
+                     if (j < 16) {
+                       w[j] = x[i + j];
+                     } else {
+                       w[j] = bit_rol(w[j - 3] ^ w[j - 8] ^ w[j - 14] ^ w[j - 16], 1);
+                     }
 
-         mode.exit = function () {
-           context.uninstall(behavior);
-         };
+                     t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)), safe_add(safe_add(e, w[j]), sha1_kt(j)));
+                     e = d;
+                     d = c;
+                     c = bit_rol(b, 30);
+                     b = a;
+                     a = t;
+                   }
 
-         return mode;
-       }
+                   a = safe_add(a, olda);
+                   b = safe_add(b, oldb);
+                   c = safe_add(c, oldc);
+                   d = safe_add(d, oldd);
+                   e = safe_add(e, olde);
+                 }
 
-       function uiConflicts(context) {
-         var dispatch$1 = dispatch('cancel', 'save');
-         var keybinding = utilKeybinding('conflicts');
+                 return Array(a, b, c, d, e);
+               }
+               /**
+                * Perform the appropriate triplet combination function for the current
+                * iteration
+                */
 
-         var _origChanges;
 
-         var _conflictList;
+               function sha1_ft(t, b, c, d) {
+                 if (t < 20) {
+                   return b & c | ~b & d;
+                 }
 
-         var _shownConflictIndex;
+                 if (t < 40) {
+                   return b ^ c ^ d;
+                 }
 
-         function keybindingOn() {
-           select(document).call(keybinding.on('⎋', cancel, true));
-         }
+                 if (t < 60) {
+                   return b & c | b & d | c & d;
+                 }
 
-         function keybindingOff() {
-           select(document).call(keybinding.unbind);
-         }
+                 return b ^ c ^ d;
+               }
+               /**
+                * Determine the appropriate additive constant for the current iteration
+                */
 
-         function tryAgain() {
-           keybindingOff();
-           dispatch$1.call('save');
-         }
 
-         function cancel() {
-           keybindingOff();
-           dispatch$1.call('cancel');
-         }
+               function sha1_kt(t) {
+                 return t < 20 ? 1518500249 : t < 40 ? 1859775393 : t < 60 ? -1894007588 : -899497514;
+               }
+             },
 
-         function conflicts(selection) {
-           keybindingOn();
-           var headerEnter = selection.selectAll('.header').data([0]).enter().append('div').attr('class', 'header fillL');
-           headerEnter.append('button').attr('class', 'fr').on('click', cancel).call(svgIcon('#iD-icon-close'));
-           headerEnter.append('h3').html(_t.html('save.conflict.header'));
-           var bodyEnter = selection.selectAll('.body').data([0]).enter().append('div').attr('class', 'body fillL');
-           var conflictsHelpEnter = bodyEnter.append('div').attr('class', 'conflicts-help').html(_t.html('save.conflict.help')); // Download changes link
+             /**
+              * @class Hashes.SHA256
+              * @param {config}
+              *
+              * A JavaScript implementation of the Secure Hash Algorithm, SHA-256, as defined in FIPS 180-2
+              * Version 2.2 Copyright Angel Marin, Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              * Also http://anmar.eu.org/projects/jssha2/
+              */
+             SHA256: function SHA256(options) {
+               /**
+                * Private properties configuration variables. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * @see this.setUpperCase() method
+                * @see this.setPad() method
+                */
+               options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
+                   var // hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-           var detected = utilDetect();
-           var changeset = new osmChangeset();
-           delete changeset.id; // Export without changeset_id
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-           var data = JXON.stringify(changeset.osmChangeJXON(_origChanges));
-           var blob = new Blob([data], {
-             type: 'text/xml;charset=utf-8;'
-           });
-           var fileName = 'changes.osc';
-           var linkEnter = conflictsHelpEnter.selectAll('.download-changes').append('a').attr('class', 'download-changes');
+               /* enable/disable utf8 encoding */
+               sha256_K;
+               /* privileged (public) methods */
 
-           if (detected.download) {
-             // All except IE11 and Edge
-             linkEnter // download the data as a file
-             .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
-           } else {
-             // IE11 and Edge
-             linkEnter // open data uri in a new tab
-             .attr('target', '_blank').on('click.download', function () {
-               navigator.msSaveBlob(blob, fileName);
-             });
-           }
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s, utf8));
+               };
 
-           linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('save.conflict.download_changes'));
-           bodyEnter.append('div').attr('class', 'conflict-container fillL3').call(showConflict, 0);
-           bodyEnter.append('div').attr('class', 'conflicts-done').attr('opacity', 0).style('display', 'none').html(_t.html('save.conflict.done'));
-           var buttonsEnter = bodyEnter.append('div').attr('class', 'buttons col12 joined conflicts-buttons');
-           buttonsEnter.append('button').attr('disabled', _conflictList.length > 1).attr('class', 'action conflicts-button col6').html(_t.html('save.title')).on('click.try_again', tryAgain);
-           buttonsEnter.append('button').attr('class', 'secondary-action conflicts-button col6').html(_t.html('confirm.cancel')).on('click.cancel', cancel);
-         }
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s, utf8), b64pad);
+               };
 
-         function showConflict(selection, index) {
-           index = utilWrap(index, _conflictList.length);
-           _shownConflictIndex = index;
-           var parent = select(selection.node().parentNode); // enable save button if this is the last conflict being reviewed..
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s, utf8), e);
+               };
 
-           if (index === _conflictList.length - 1) {
-             window.setTimeout(function () {
-               parent.select('.conflicts-button').attr('disabled', null);
-               parent.select('.conflicts-done').transition().attr('opacity', 1).style('display', 'block');
-             }, 250);
-           }
+               this.raw = function (s) {
+                 return rstr(s, utf8);
+               };
 
-           var conflict = selection.selectAll('.conflict').data([_conflictList[index]]);
-           conflict.exit().remove();
-           var conflictEnter = conflict.enter().append('div').attr('class', 'conflict');
-           conflictEnter.append('h4').attr('class', 'conflict-count').html(_t.html('save.conflict.count', {
-             num: index + 1,
-             total: _conflictList.length
-           }));
-           conflictEnter.append('a').attr('class', 'conflict-description').attr('href', '#').html(function (d) {
-             return d.name;
-           }).on('click', function (d3_event, d) {
-             d3_event.preventDefault();
-             zoomToEntity(d.id);
-           });
-           var details = conflictEnter.append('div').attr('class', 'conflict-detail-container');
-           details.append('ul').attr('class', 'conflict-detail-list').selectAll('li').data(function (d) {
-             return d.details || [];
-           }).enter().append('li').attr('class', 'conflict-detail-item').html(function (d) {
-             return d;
-           });
-           details.append('div').attr('class', 'conflict-choices').call(addChoices);
-           details.append('div').attr('class', 'conflict-nav-buttons joined cf').selectAll('button').data(['previous', 'next']).enter().append('button').html(function (d) {
-             return _t.html('save.conflict.' + d);
-           }).attr('class', 'conflict-nav-button action col6').attr('disabled', function (d, i) {
-             return i === 0 && index === 0 || i === 1 && index === _conflictList.length - 1 || null;
-           }).on('click', function (d3_event, d) {
-             d3_event.preventDefault();
-             var container = parent.selectAll('.conflict-container');
-             var sign = d === 'previous' ? -1 : 1;
-             container.selectAll('.conflict').remove();
-             container.call(showConflict, index + sign);
-           });
-         }
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-         function addChoices(selection) {
-           var choices = selection.append('ul').attr('class', 'layer-list').selectAll('li').data(function (d) {
-             return d.choices || [];
-           }); // enter
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-           var choicesEnter = choices.enter().append('li').attr('class', 'layer');
-           var labelEnter = choicesEnter.append('label');
-           labelEnter.append('input').attr('type', 'radio').attr('name', function (d) {
-             return d.id;
-           }).on('change', function (d3_event, d) {
-             var ul = this.parentNode.parentNode.parentNode;
-             ul.__data__.chosen = d.id;
-             choose(d3_event, ul, d);
-           });
-           labelEnter.append('span').html(function (d) {
-             return d.text;
-           }); // update
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                * @public
+                */
 
-           choicesEnter.merge(choices).each(function (d) {
-             var ul = this.parentNode;
 
-             if (ul.__data__.chosen === d.id) {
-               choose(null, ul, d);
-             }
-           });
-         }
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-         function choose(d3_event, ul, datum) {
-           if (d3_event) d3_event.preventDefault();
-           select(ul).selectAll('li').classed('active', function (d) {
-             return d === datum;
-           }).selectAll('input').property('checked', function (d) {
-             return d === datum;
-           });
-           var extent = geoExtent();
-           var entity;
-           entity = context.graph().hasEntity(datum.id);
-           if (entity) extent._extend(entity.extent(context.graph()));
-           datum.action();
-           entity = context.graph().hasEntity(datum.id);
-           if (entity) extent._extend(entity.extent(context.graph()));
-           zoomToEntity(datum.id, extent);
-         }
 
-         function zoomToEntity(id, extent) {
-           context.surface().selectAll('.hover').classed('hover', false);
-           var entity = context.graph().hasEntity(id);
+               this.setUpperCase = function (a) {
 
-           if (entity) {
-             if (extent) {
-               context.map().trimmedExtent(extent);
-             } else {
-               context.map().zoomToEase(entity);
-             }
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-             context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
-           }
-         } // The conflict list should be an array of objects like:
-         // {
-         //     id: id,
-         //     name: entityName(local),
-         //     details: merge.conflicts(),
-         //     chosen: 1,
-         //     choices: [
-         //         choice(id, keepMine, forceLocal),
-         //         choice(id, keepTheirs, forceRemote)
-         //     ]
-         // }
 
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-         conflicts.conflictList = function (_) {
-           if (!arguments.length) return _conflictList;
-           _conflictList = _;
-           return conflicts;
-         };
 
-         conflicts.origChanges = function (_) {
-           if (!arguments.length) return _origChanges;
-           _origChanges = _;
-           return conflicts;
-         };
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-         conflicts.shownEntityIds = function () {
-           if (_conflictList && typeof _shownConflictIndex === 'number') {
-             return [_conflictList[_shownConflictIndex].id];
-           }
+                 return this;
+               }; // private methods
 
-           return [];
-         };
+               /**
+                * Calculate the SHA-512 of a raw string
+                */
 
-         return utilRebind(conflicts, dispatch$1, 'on');
-       }
 
-       function uiConfirm(selection) {
-         var modalSelection = uiModal(selection);
-         modalSelection.select('.modal').classed('modal-alert', true);
-         var section = modalSelection.select('.content');
-         section.append('div').attr('class', 'modal-section header');
-         section.append('div').attr('class', 'modal-section message-text');
-         var buttons = section.append('div').attr('class', 'modal-section buttons cf');
+               function rstr(s, utf8) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
+               }
+               /**
+                * Calculate the HMAC-sha256 of a key and some data (raw strings)
+                */
 
-         modalSelection.okButton = function () {
-           buttons.append('button').attr('class', 'button ok-button action').on('click.confirm', function () {
-             modalSelection.remove();
-           }).html(_t.html('confirm.okay')).node().focus();
-           return modalSelection;
-         };
 
-         return modalSelection;
-       }
+               function rstr_hmac(key, data) {
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 var hash,
+                     i = 0,
+                     bkey = rstr2binb(key),
+                     ipad = Array(16),
+                     opad = Array(16);
 
-       function uiChangesetEditor(context) {
-         var dispatch$1 = dispatch('change');
-         var formFields = uiFormFields(context);
-         var commentCombo = uiCombobox(context, 'comment').caseSensitive(true);
+                 if (bkey.length > 16) {
+                   bkey = binb(bkey, key.length * 8);
+                 }
 
-         var _fieldsArr;
+                 for (; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-         var _tags;
+                 hash = binb(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+                 return binb2rstr(binb(opad.concat(hash), 512 + 256));
+               }
+               /*
+                * Main sha256 function, with its support functions
+                */
 
-         var _changesetID;
 
-         function changesetEditor(selection) {
-           render(selection);
-         }
+               function sha256_S(X, n) {
+                 return X >>> n | X << 32 - n;
+               }
 
-         function render(selection) {
-           var initial = false;
+               function sha256_R(X, n) {
+                 return X >>> n;
+               }
 
-           if (!_fieldsArr) {
-             initial = true;
-             var presets = _mainPresetIndex;
-             _fieldsArr = [uiField(context, presets.field('comment'), null, {
-               show: true,
-               revert: false
-             }), uiField(context, presets.field('source'), null, {
-               show: false,
-               revert: false
-             }), uiField(context, presets.field('hashtags'), null, {
-               show: false,
-               revert: false
-             })];
+               function sha256_Ch(x, y, z) {
+                 return x & y ^ ~x & z;
+               }
 
-             _fieldsArr.forEach(function (field) {
-               field.on('change', function (t, onInput) {
-                 dispatch$1.call('change', field, undefined, t, onInput);
-               });
-             });
-           }
+               function sha256_Maj(x, y, z) {
+                 return x & y ^ x & z ^ y & z;
+               }
 
-           _fieldsArr.forEach(function (field) {
-             field.tags(_tags);
-           });
+               function sha256_Sigma0256(x) {
+                 return sha256_S(x, 2) ^ sha256_S(x, 13) ^ sha256_S(x, 22);
+               }
 
-           selection.call(formFields.fieldsArr(_fieldsArr));
+               function sha256_Sigma1256(x) {
+                 return sha256_S(x, 6) ^ sha256_S(x, 11) ^ sha256_S(x, 25);
+               }
 
-           if (initial) {
-             var commentField = selection.select('.form-field-comment textarea');
-             var commentNode = commentField.node();
+               function sha256_Gamma0256(x) {
+                 return sha256_S(x, 7) ^ sha256_S(x, 18) ^ sha256_R(x, 3);
+               }
 
-             if (commentNode) {
-               commentNode.focus();
-               commentNode.select();
-             } // trigger a 'blur' event so that comment field can be cleaned
-             // and checked for hashtags, even if retrieved from localstorage
+               function sha256_Gamma1256(x) {
+                 return sha256_S(x, 17) ^ sha256_S(x, 19) ^ sha256_R(x, 10);
+               }
 
+               sha256_K = [1116352408, 1899447441, -1245643825, -373957723, 961987163, 1508970993, -1841331548, -1424204075, -670586216, 310598401, 607225278, 1426881987, 1925078388, -2132889090, -1680079193, -1046744716, -459576895, -272742522, 264347078, 604807628, 770255983, 1249150122, 1555081692, 1996064986, -1740746414, -1473132947, -1341970488, -1084653625, -958395405, -710438585, 113926993, 338241895, 666307205, 773529912, 1294757372, 1396182291, 1695183700, 1986661051, -2117940946, -1838011259, -1564481375, -1474664885, -1035236496, -949202525, -778901479, -694614492, -200395387, 275423344, 430227734, 506948616, 659060556, 883997877, 958139571, 1322822218, 1537002063, 1747873779, 1955562222, 2024104815, -2067236844, -1933114872, -1866530822, -1538233109, -1090935817, -965641998];
 
-             utilTriggerEvent(commentField, 'blur');
-             var osm = context.connection();
+               function binb(m, l) {
+                 var HASH = [1779033703, -1150833019, 1013904242, -1521486534, 1359893119, -1694144372, 528734635, 1541459225];
+                 var W = new Array(64);
+                 var a, b, c, d, e, f, g, h;
+                 var i, j, T1, T2;
+                 /* append padding */
 
-             if (osm) {
-               osm.userChangesets(function (err, changesets) {
-                 if (err) return;
-                 var comments = changesets.map(function (changeset) {
-                   var comment = changeset.tags.comment;
-                   return comment ? {
-                     title: comment,
-                     value: comment
-                   } : null;
-                 }).filter(Boolean);
-                 commentField.call(commentCombo.data(utilArrayUniqBy(comments, 'title')));
-               });
-             }
-           } // Add warning if comment mentions Google
+                 m[l >> 5] |= 0x80 << 24 - l % 32;
+                 m[(l + 64 >> 9 << 4) + 15] = l;
 
+                 for (i = 0; i < m.length; i += 16) {
+                   a = HASH[0];
+                   b = HASH[1];
+                   c = HASH[2];
+                   d = HASH[3];
+                   e = HASH[4];
+                   f = HASH[5];
+                   g = HASH[6];
+                   h = HASH[7];
 
-           var hasGoogle = _tags.comment.match(/google/i);
+                   for (j = 0; j < 64; j += 1) {
+                     if (j < 16) {
+                       W[j] = m[j + i];
+                     } else {
+                       W[j] = safe_add(safe_add(safe_add(sha256_Gamma1256(W[j - 2]), W[j - 7]), sha256_Gamma0256(W[j - 15])), W[j - 16]);
+                     }
 
-           var commentWarning = selection.select('.form-field-comment').selectAll('.comment-warning').data(hasGoogle ? [0] : []);
-           commentWarning.exit().transition().duration(200).style('opacity', 0).remove();
-           var commentEnter = commentWarning.enter().insert('div', '.tag-reference-body').attr('class', 'field-warning comment-warning').style('opacity', 0);
-           commentEnter.append('a').attr('target', '_blank').call(svgIcon('#iD-icon-alert', 'inline')).attr('href', _t('commit.google_warning_link')).append('span').html(_t.html('commit.google_warning'));
-           commentEnter.transition().duration(200).style('opacity', 1);
-         }
+                     T1 = safe_add(safe_add(safe_add(safe_add(h, sha256_Sigma1256(e)), sha256_Ch(e, f, g)), sha256_K[j]), W[j]);
+                     T2 = safe_add(sha256_Sigma0256(a), sha256_Maj(a, b, c));
+                     h = g;
+                     g = f;
+                     f = e;
+                     e = safe_add(d, T1);
+                     d = c;
+                     c = b;
+                     b = a;
+                     a = safe_add(T1, T2);
+                   }
 
-         changesetEditor.tags = function (_) {
-           if (!arguments.length) return _tags;
-           _tags = _; // Don't reset _fieldsArr here.
+                   HASH[0] = safe_add(a, HASH[0]);
+                   HASH[1] = safe_add(b, HASH[1]);
+                   HASH[2] = safe_add(c, HASH[2]);
+                   HASH[3] = safe_add(d, HASH[3]);
+                   HASH[4] = safe_add(e, HASH[4]);
+                   HASH[5] = safe_add(f, HASH[5]);
+                   HASH[6] = safe_add(g, HASH[6]);
+                   HASH[7] = safe_add(h, HASH[7]);
+                 }
 
-           return changesetEditor;
-         };
+                 return HASH;
+               }
+             },
 
-         changesetEditor.changesetID = function (_) {
-           if (!arguments.length) return _changesetID;
-           if (_changesetID === _) return changesetEditor;
-           _changesetID = _;
-           _fieldsArr = null;
-           return changesetEditor;
-         };
+             /**
+              * @class Hashes.SHA512
+              * @param {config}
+              *
+              * A JavaScript implementation of the Secure Hash Algorithm, SHA-512, as defined in FIPS 180-2
+              * Version 2.2 Copyright Anonymous Contributor, Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              */
+             SHA512: function SHA512(options) {
+               /**
+                * Private properties configuration variables. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * @see this.setUpperCase() method
+                * @see this.setPad() method
+                */
+               options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
 
-         return utilRebind(changesetEditor, dispatch$1, 'on');
-       }
+               var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pad : '=',
 
-       function uiSectionChanges(context) {
-         var detected = utilDetect();
-         var _discardTags = {};
-         _mainFileFetcher.get('discarded').then(function (d) {
-           _discardTags = d;
-         })["catch"](function () {
-           /* ignore */
-         });
-         var section = uiSection('changes-list', context).label(function () {
-           var history = context.history();
-           var summary = history.difference().summary();
-           return _t('inspector.title_count', {
-             title: _t.html('commit.changes'),
-             count: summary.length
-           });
-         }).disclosureContent(renderDisclosureContent);
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-         function renderDisclosureContent(selection) {
-           var history = context.history();
-           var summary = history.difference().summary();
-           var container = selection.selectAll('.commit-section').data([0]);
-           var containerEnter = container.enter().append('div').attr('class', 'commit-section');
-           containerEnter.append('ul').attr('class', 'changeset-list');
-           container = containerEnter.merge(container);
-           var items = container.select('ul').selectAll('li').data(summary);
-           var itemsEnter = items.enter().append('li').attr('class', 'change-item');
-           var buttons = itemsEnter.append('button').on('mouseover', mouseover).on('mouseout', mouseout).on('click', click);
-           buttons.each(function (d) {
-             select(this).call(svgIcon('#iD-icon-' + d.entity.geometry(d.graph), 'pre-text ' + d.changeType));
-           });
-           buttons.append('span').attr('class', 'change-type').html(function (d) {
-             return _t.html('commit.' + d.changeType) + ' ';
-           });
-           buttons.append('strong').attr('class', 'entity-type').html(function (d) {
-             var matched = _mainPresetIndex.match(d.entity, d.graph);
-             return matched && matched.name() || utilDisplayType(d.entity.id);
-           });
-           buttons.append('span').attr('class', 'entity-name').html(function (d) {
-             var name = utilDisplayName(d.entity) || '',
-                 string = '';
+               /* enable/disable utf8 encoding */
+               sha512_k;
+               /* privileged (public) methods */
 
-             if (name !== '') {
-               string += ':';
-             }
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s));
+               };
 
-             return string += ' ' + name;
-           });
-           items = itemsEnter.merge(items); // Download changeset link
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-           var changeset = new osmChangeset().update({
-             id: undefined
-           });
-           var changes = history.changes(actionDiscardTags(history.difference(), _discardTags));
-           delete changeset.id; // Export without chnageset_id
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-           var data = JXON.stringify(changeset.osmChangeJXON(changes));
-           var blob = new Blob([data], {
-             type: 'text/xml;charset=utf-8;'
-           });
-           var fileName = 'changes.osc';
-           var linkEnter = container.selectAll('.download-changes').data([0]).enter().append('a').attr('class', 'download-changes');
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-           if (detected.download) {
-             // All except IE11 and Edge
-             linkEnter // download the data as a file
-             .attr('href', window.URL.createObjectURL(blob)).attr('download', fileName);
-           } else {
-             // IE11 and Edge
-             linkEnter // open data uri in a new tab
-             .attr('target', '_blank').on('click.download', function () {
-               navigator.msSaveBlob(blob, fileName);
-             });
-           }
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-           linkEnter.call(svgIcon('#iD-icon-load', 'inline')).append('span').html(_t.html('commit.download_changes'));
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-           function mouseover(d) {
-             if (d.entity) {
-               context.surface().selectAll(utilEntityOrMemberSelector([d.entity.id], context.graph())).classed('hover', true);
-             }
-           }
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                * @public
+                */
 
-           function mouseout() {
-             context.surface().selectAll('.hover').classed('hover', false);
-           }
 
-           function click(d3_event, change) {
-             if (change.changeType !== 'deleted') {
-               var entity = change.entity;
-               context.map().zoomToEase(entity);
-               context.surface().selectAll(utilEntityOrMemberSelector([entity.id], context.graph())).classed('hover', true);
-             }
-           }
-         }
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-         return section;
-       }
 
-       function uiCommitWarnings(context) {
-         function commitWarnings(selection) {
-           var issuesBySeverity = context.validator().getIssuesBySeverity({
-             what: 'edited',
-             where: 'all',
-             includeDisabledRules: true
-           });
+               this.setUpperCase = function (a) {
 
-           for (var severity in issuesBySeverity) {
-             var issues = issuesBySeverity[severity];
-             var section = severity + '-section';
-             var issueItem = severity + '-item';
-             var container = selection.selectAll('.' + section).data(issues.length ? [0] : []);
-             container.exit().remove();
-             var containerEnter = container.enter().append('div').attr('class', 'modal-section ' + section + ' fillL2');
-             containerEnter.append('h3').html(severity === 'warning' ? _t.html('commit.warnings') : _t.html('commit.errors'));
-             containerEnter.append('ul').attr('class', 'changeset-list');
-             container = containerEnter.merge(container);
-             var items = container.select('ul').selectAll('li').data(issues, function (d) {
-               return d.id;
-             });
-             items.exit().remove();
-             var itemsEnter = items.enter().append('li').attr('class', issueItem);
-             var buttons = itemsEnter.append('button').on('mouseover', function (d3_event, d) {
-               if (d.entityIds) {
-                 context.surface().selectAll(utilEntityOrMemberSelector(d.entityIds, context.graph())).classed('hover', true);
-               }
-             }).on('mouseout', function () {
-               context.surface().selectAll('.hover').classed('hover', false);
-             }).on('click', function (d3_event, d) {
-               context.validator().focusIssue(d);
-             });
-             buttons.call(svgIcon('#iD-icon-alert', 'pre-text'));
-             buttons.append('strong').attr('class', 'issue-message');
-             buttons.filter(function (d) {
-               return d.tooltip;
-             }).call(uiTooltip().title(function (d) {
-               return d.tooltip;
-             }).placement('top'));
-             items = itemsEnter.merge(items);
-             items.selectAll('.issue-message').html(function (d) {
-               return d.message(context);
-             });
-           }
-         }
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-         return commitWarnings;
-       }
 
-       var readOnlyTags = [/^changesets_count$/, /^created_by$/, /^ideditor:/, /^imagery_used$/, /^host$/, /^locale$/, /^warnings:/, /^resolved:/, /^closed:note$/, /^closed:keepright$/, /^closed:improveosm:/, /^closed:osmose:/]; // treat most punctuation (except -, _, +, &) as hashtag delimiters - #4398
-       // from https://stackoverflow.com/a/25575009
+               this.setPad = function (a) {
+                 b64pad = a || b64pad;
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-       var hashtagRegex = /(#[^\u2000-\u206F\u2E00-\u2E7F\s\\'!"#$%()*,.\/:;<=>?@\[\]^`{|}~]+)/g;
-       function uiCommit(context) {
-         var dispatch$1 = dispatch('cancel');
 
-         var _userDetails;
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-         var _selection;
+                 return this;
+               };
+               /* private methods */
 
-         var changesetEditor = uiChangesetEditor(context).on('change', changeTags);
-         var rawTagEditor = uiSectionRawTagEditor('changeset-tag-editor', context).on('change', changeTags).readOnlyTags(readOnlyTags);
-         var commitChanges = uiSectionChanges(context);
-         var commitWarnings = uiCommitWarnings(context);
+               /**
+                * Calculate the SHA-512 of a raw string
+                */
 
-         function commit(selection) {
-           _selection = selection; // Initialize changeset if one does not exist yet.
 
-           if (!context.changeset) initChangeset();
-           loadDerivedChangesetTags();
-           selection.call(render);
-         }
+               function rstr(s) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binb2rstr(binb(rstr2binb(s), s.length * 8));
+               }
+               /*
+                * Calculate the HMAC-SHA-512 of a key and some data (raw strings)
+                */
 
-         function initChangeset() {
-           // expire stored comment, hashtags, source after cutoff datetime - #3947 #4899
-           var commentDate = +corePreferences('commentDate') || 0;
-           var currDate = Date.now();
-           var cutoff = 2 * 86400 * 1000; // 2 days
 
-           if (commentDate > currDate || currDate - commentDate > cutoff) {
-             corePreferences('comment', null);
-             corePreferences('hashtags', null);
-             corePreferences('source', null);
-           } // load in explicitly-set values, if any
+               function rstr_hmac(key, data) {
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 var hash,
+                     i = 0,
+                     bkey = rstr2binb(key),
+                     ipad = Array(32),
+                     opad = Array(32);
 
+                 if (bkey.length > 32) {
+                   bkey = binb(bkey, key.length * 8);
+                 }
 
-           if (context.defaultChangesetComment()) {
-             corePreferences('comment', context.defaultChangesetComment());
-             corePreferences('commentDate', Date.now());
-           }
+                 for (; i < 32; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
-           if (context.defaultChangesetSource()) {
-             corePreferences('source', context.defaultChangesetSource());
-             corePreferences('commentDate', Date.now());
-           }
+                 hash = binb(ipad.concat(rstr2binb(data)), 1024 + data.length * 8);
+                 return binb2rstr(binb(opad.concat(hash), 1024 + 512));
+               }
+               /**
+                * Calculate the SHA-512 of an array of big-endian dwords, and a bit length
+                */
 
-           if (context.defaultChangesetHashtags()) {
-             corePreferences('hashtags', context.defaultChangesetHashtags());
-             corePreferences('commentDate', Date.now());
-           }
 
-           var detected = utilDetect();
-           var tags = {
-             comment: corePreferences('comment') || '',
-             created_by: context.cleanTagValue('iD ' + context.version),
-             host: context.cleanTagValue(detected.host),
-             locale: context.cleanTagValue(_mainLocalizer.localeCode())
-           }; // call findHashtags initially - this will remove stored
-           // hashtags if any hashtags are found in the comment - #4304
+               function binb(x, len) {
+                 var j,
+                     i,
+                     l,
+                     W = new Array(80),
+                     hash = new Array(16),
+                     //Initial hash values
+                 H = [new int64(0x6a09e667, -205731576), new int64(-1150833019, -2067093701), new int64(0x3c6ef372, -23791573), new int64(-1521486534, 0x5f1d36f1), new int64(0x510e527f, -1377402159), new int64(-1694144372, 0x2b3e6c1f), new int64(0x1f83d9ab, -79577749), new int64(0x5be0cd19, 0x137e2179)],
+                     T1 = new int64(0, 0),
+                     T2 = new int64(0, 0),
+                     a = new int64(0, 0),
+                     b = new int64(0, 0),
+                     c = new int64(0, 0),
+                     d = new int64(0, 0),
+                     e = new int64(0, 0),
+                     f = new int64(0, 0),
+                     g = new int64(0, 0),
+                     h = new int64(0, 0),
+                     //Temporary variables not specified by the document
+                 s0 = new int64(0, 0),
+                     s1 = new int64(0, 0),
+                     Ch = new int64(0, 0),
+                     Maj = new int64(0, 0),
+                     r1 = new int64(0, 0),
+                     r2 = new int64(0, 0),
+                     r3 = new int64(0, 0);
 
-           findHashtags(tags, true);
-           var hashtags = corePreferences('hashtags');
+                 if (sha512_k === undefined) {
+                   //SHA512 constants
+                   sha512_k = [new int64(0x428a2f98, -685199838), new int64(0x71374491, 0x23ef65cd), new int64(-1245643825, -330482897), new int64(-373957723, -2121671748), new int64(0x3956c25b, -213338824), new int64(0x59f111f1, -1241133031), new int64(-1841331548, -1357295717), new int64(-1424204075, -630357736), new int64(-670586216, -1560083902), new int64(0x12835b01, 0x45706fbe), new int64(0x243185be, 0x4ee4b28c), new int64(0x550c7dc3, -704662302), new int64(0x72be5d74, -226784913), new int64(-2132889090, 0x3b1696b1), new int64(-1680079193, 0x25c71235), new int64(-1046744716, -815192428), new int64(-459576895, -1628353838), new int64(-272742522, 0x384f25e3), new int64(0xfc19dc6, -1953704523), new int64(0x240ca1cc, 0x77ac9c65), new int64(0x2de92c6f, 0x592b0275), new int64(0x4a7484aa, 0x6ea6e483), new int64(0x5cb0a9dc, -1119749164), new int64(0x76f988da, -2096016459), new int64(-1740746414, -295247957), new int64(-1473132947, 0x2db43210), new int64(-1341970488, -1728372417), new int64(-1084653625, -1091629340), new int64(-958395405, 0x3da88fc2), new int64(-710438585, -1828018395), new int64(0x6ca6351, -536640913), new int64(0x14292967, 0xa0e6e70), new int64(0x27b70a85, 0x46d22ffc), new int64(0x2e1b2138, 0x5c26c926), new int64(0x4d2c6dfc, 0x5ac42aed), new int64(0x53380d13, -1651133473), new int64(0x650a7354, -1951439906), new int64(0x766a0abb, 0x3c77b2a8), new int64(-2117940946, 0x47edaee6), new int64(-1838011259, 0x1482353b), new int64(-1564481375, 0x4cf10364), new int64(-1474664885, -1136513023), new int64(-1035236496, -789014639), new int64(-949202525, 0x654be30), new int64(-778901479, -688958952), new int64(-694614492, 0x5565a910), new int64(-200395387, 0x5771202a), new int64(0x106aa070, 0x32bbd1b8), new int64(0x19a4c116, -1194143544), new int64(0x1e376c08, 0x5141ab53), new int64(0x2748774c, -544281703), new int64(0x34b0bcb5, -509917016), new int64(0x391c0cb3, -976659869), new int64(0x4ed8aa4a, -482243893), new int64(0x5b9cca4f, 0x7763e373), new int64(0x682e6ff3, -692930397), new int64(0x748f82ee, 0x5defb2fc), new int64(0x78a5636f, 0x43172f60), new int64(-2067236844, -1578062990), new int64(-1933114872, 0x1a6439ec), new int64(-1866530822, 0x23631e28), new int64(-1538233109, -561857047), new int64(-1090935817, -1295615723), new int64(-965641998, -479046869), new int64(-903397682, -366583396), new int64(-779700025, 0x21c0c207), new int64(-354779690, -840897762), new int64(-176337025, -294727304), new int64(0x6f067aa, 0x72176fba), new int64(0xa637dc5, -1563912026), new int64(0x113f9804, -1090974290), new int64(0x1b710b35, 0x131c471b), new int64(0x28db77f5, 0x23047d84), new int64(0x32caab7b, 0x40c72493), new int64(0x3c9ebe0a, 0x15c9bebc), new int64(0x431d67c4, -1676669620), new int64(0x4cc5d4be, -885112138), new int64(0x597f299c, -60457430), new int64(0x5fcb6fab, 0x3ad6faec), new int64(0x6c44198c, 0x4a475817)];
+                 }
 
-           if (hashtags) {
-             tags.hashtags = hashtags;
-           }
+                 for (i = 0; i < 80; i += 1) {
+                   W[i] = new int64(0, 0);
+                 } // append padding to the source string. The format is described in the FIPS.
 
-           var source = corePreferences('source');
 
-           if (source) {
-             tags.source = source;
-           }
+                 x[len >> 5] |= 0x80 << 24 - (len & 0x1f);
+                 x[(len + 128 >> 10 << 5) + 31] = len;
+                 l = x.length;
 
-           var photoOverlaysUsed = context.history().photoOverlaysUsed();
+                 for (i = 0; i < l; i += 32) {
+                   //32 dwords is the block size
+                   int64copy(a, H[0]);
+                   int64copy(b, H[1]);
+                   int64copy(c, H[2]);
+                   int64copy(d, H[3]);
+                   int64copy(e, H[4]);
+                   int64copy(f, H[5]);
+                   int64copy(g, H[6]);
+                   int64copy(h, H[7]);
 
-           if (photoOverlaysUsed.length) {
-             var sources = (tags.source || '').split(';'); // include this tag for any photo layer
+                   for (j = 0; j < 16; j += 1) {
+                     W[j].h = x[i + 2 * j];
+                     W[j].l = x[i + 2 * j + 1];
+                   }
 
-             if (sources.indexOf('streetlevel imagery') === -1) {
-               sources.push('streetlevel imagery');
-             } // add the photo overlays used during editing as sources
+                   for (j = 16; j < 80; j += 1) {
+                     //sigma1
+                     int64rrot(r1, W[j - 2], 19);
+                     int64revrrot(r2, W[j - 2], 29);
+                     int64shr(r3, W[j - 2], 6);
+                     s1.l = r1.l ^ r2.l ^ r3.l;
+                     s1.h = r1.h ^ r2.h ^ r3.h; //sigma0
 
+                     int64rrot(r1, W[j - 15], 1);
+                     int64rrot(r2, W[j - 15], 8);
+                     int64shr(r3, W[j - 15], 7);
+                     s0.l = r1.l ^ r2.l ^ r3.l;
+                     s0.h = r1.h ^ r2.h ^ r3.h;
+                     int64add4(W[j], s1, W[j - 7], s0, W[j - 16]);
+                   }
 
-             photoOverlaysUsed.forEach(function (photoOverlay) {
-               if (sources.indexOf(photoOverlay) === -1) {
-                 sources.push(photoOverlay);
-               }
-             });
-             tags.source = context.cleanTagValue(sources.join(';'));
-           }
+                   for (j = 0; j < 80; j += 1) {
+                     //Ch
+                     Ch.l = e.l & f.l ^ ~e.l & g.l;
+                     Ch.h = e.h & f.h ^ ~e.h & g.h; //Sigma1
 
-           context.changeset = new osmChangeset({
-             tags: tags
-           });
-         } // Calculates read-only metadata tags based on the user's editing session and applies
-         // them to the changeset.
+                     int64rrot(r1, e, 14);
+                     int64rrot(r2, e, 18);
+                     int64revrrot(r3, e, 9);
+                     s1.l = r1.l ^ r2.l ^ r3.l;
+                     s1.h = r1.h ^ r2.h ^ r3.h; //Sigma0
 
+                     int64rrot(r1, a, 28);
+                     int64revrrot(r2, a, 2);
+                     int64revrrot(r3, a, 7);
+                     s0.l = r1.l ^ r2.l ^ r3.l;
+                     s0.h = r1.h ^ r2.h ^ r3.h; //Maj
 
-         function loadDerivedChangesetTags() {
-           var osm = context.connection();
-           if (!osm) return;
-           var tags = Object.assign({}, context.changeset.tags); // shallow copy
-           // assign tags for imagery used
+                     Maj.l = a.l & b.l ^ a.l & c.l ^ b.l & c.l;
+                     Maj.h = a.h & b.h ^ a.h & c.h ^ b.h & c.h;
+                     int64add5(T1, h, s1, Ch, sha512_k[j], W[j]);
+                     int64add(T2, s0, Maj);
+                     int64copy(h, g);
+                     int64copy(g, f);
+                     int64copy(f, e);
+                     int64add(e, d, T1);
+                     int64copy(d, c);
+                     int64copy(c, b);
+                     int64copy(b, a);
+                     int64add(a, T1, T2);
+                   }
 
-           var imageryUsed = context.cleanTagValue(context.history().imageryUsed().join(';'));
-           tags.imagery_used = imageryUsed || 'None'; // assign tags for closed issues and notes
+                   int64add(H[0], H[0], a);
+                   int64add(H[1], H[1], b);
+                   int64add(H[2], H[2], c);
+                   int64add(H[3], H[3], d);
+                   int64add(H[4], H[4], e);
+                   int64add(H[5], H[5], f);
+                   int64add(H[6], H[6], g);
+                   int64add(H[7], H[7], h);
+                 } //represent the hash as an array of 32-bit dwords
 
-           var osmClosed = osm.getClosedIDs();
-           var itemType;
 
-           if (osmClosed.length) {
-             tags['closed:note'] = context.cleanTagValue(osmClosed.join(';'));
-           }
+                 for (i = 0; i < 8; i += 1) {
+                   hash[2 * i] = H[i].h;
+                   hash[2 * i + 1] = H[i].l;
+                 }
 
-           if (services.keepRight) {
-             var krClosed = services.keepRight.getClosedIDs();
+                 return hash;
+               } //A constructor for 64-bit numbers
 
-             if (krClosed.length) {
-               tags['closed:keepright'] = context.cleanTagValue(krClosed.join(';'));
-             }
-           }
 
-           if (services.improveOSM) {
-             var iOsmClosed = services.improveOSM.getClosedCounts();
+               function int64(h, l) {
+                 this.h = h;
+                 this.l = l; //this.toString = int64toString;
+               } //Copies src into dst, assuming both are 64-bit numbers
 
-             for (itemType in iOsmClosed) {
-               tags['closed:improveosm:' + itemType] = context.cleanTagValue(iOsmClosed[itemType].toString());
-             }
-           }
 
-           if (services.osmose) {
-             var osmoseClosed = services.osmose.getClosedCounts();
+               function int64copy(dst, src) {
+                 dst.h = src.h;
+                 dst.l = src.l;
+               } //Right-rotates a 64-bit number by shift
+               //Won't handle cases of shift>=32
+               //The function revrrot() is for that
 
-             for (itemType in osmoseClosed) {
-               tags['closed:osmose:' + itemType] = context.cleanTagValue(osmoseClosed[itemType].toString());
-             }
-           } // remove existing issue counts
 
+               function int64rrot(dst, x, shift) {
+                 dst.l = x.l >>> shift | x.h << 32 - shift;
+                 dst.h = x.h >>> shift | x.l << 32 - shift;
+               } //Reverses the dwords of the source and then rotates right by shift.
+               //This is equivalent to rotation by 32+shift
 
-           for (var key in tags) {
-             if (key.match(/(^warnings:)|(^resolved:)/)) {
-               delete tags[key];
-             }
-           }
 
-           function addIssueCounts(issues, prefix) {
-             var issuesByType = utilArrayGroupBy(issues, 'type');
+               function int64revrrot(dst, x, shift) {
+                 dst.l = x.h >>> shift | x.l << 32 - shift;
+                 dst.h = x.l >>> shift | x.h << 32 - shift;
+               } //Bitwise-shifts right a 64-bit number by shift
+               //Won't handle shift>=32, but it's never needed in SHA512
 
-             for (var issueType in issuesByType) {
-               var issuesOfType = issuesByType[issueType];
 
-               if (issuesOfType[0].subtype) {
-                 var issuesBySubtype = utilArrayGroupBy(issuesOfType, 'subtype');
+               function int64shr(dst, x, shift) {
+                 dst.l = x.l >>> shift | x.h << 32 - shift;
+                 dst.h = x.h >>> shift;
+               } //Adds two 64-bit numbers
+               //Like the original implementation, does not rely on 32-bit operations
 
-                 for (var issueSubtype in issuesBySubtype) {
-                   var issuesOfSubtype = issuesBySubtype[issueSubtype];
-                   tags[prefix + ':' + issueType + ':' + issueSubtype] = context.cleanTagValue(issuesOfSubtype.length.toString());
-                 }
-               } else {
-                 tags[prefix + ':' + issueType] = context.cleanTagValue(issuesOfType.length.toString());
-               }
-             }
-           } // add counts of warnings generated by the user's edits
 
+               function int64add(dst, x, y) {
+                 var w0 = (x.l & 0xffff) + (y.l & 0xffff);
+                 var w1 = (x.l >>> 16) + (y.l >>> 16) + (w0 >>> 16);
+                 var w2 = (x.h & 0xffff) + (y.h & 0xffff) + (w1 >>> 16);
+                 var w3 = (x.h >>> 16) + (y.h >>> 16) + (w2 >>> 16);
+                 dst.l = w0 & 0xffff | w1 << 16;
+                 dst.h = w2 & 0xffff | w3 << 16;
+               } //Same, except with 4 addends. Works faster than adding them one by one.
 
-           var warnings = context.validator().getIssuesBySeverity({
-             what: 'edited',
-             where: 'all',
-             includeIgnored: true,
-             includeDisabledRules: true
-           }).warning;
-           addIssueCounts(warnings, 'warnings'); // add counts of issues resolved by the user's edits
 
-           var resolvedIssues = context.validator().getResolvedIssues();
-           addIssueCounts(resolvedIssues, 'resolved');
-           context.changeset = context.changeset.update({
-             tags: tags
-           });
-         }
+               function int64add4(dst, a, b, c, d) {
+                 var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff);
+                 var w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (w0 >>> 16);
+                 var w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (w1 >>> 16);
+                 var w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (w2 >>> 16);
+                 dst.l = w0 & 0xffff | w1 << 16;
+                 dst.h = w2 & 0xffff | w3 << 16;
+               } //Same, except with 5 addends
 
-         function render(selection) {
-           var osm = context.connection();
-           if (!osm) return;
-           var header = selection.selectAll('.header').data([0]);
-           var headerTitle = header.enter().append('div').attr('class', 'header fillL');
-           headerTitle.append('div').append('h3').html(_t.html('commit.title'));
-           headerTitle.append('button').attr('class', 'close').on('click', function () {
-             dispatch$1.call('cancel', this);
-           }).call(svgIcon('#iD-icon-close'));
-           var body = selection.selectAll('.body').data([0]);
-           body = body.enter().append('div').attr('class', 'body').merge(body); // Changeset Section
 
-           var changesetSection = body.selectAll('.changeset-editor').data([0]);
-           changesetSection = changesetSection.enter().append('div').attr('class', 'modal-section changeset-editor').merge(changesetSection);
-           changesetSection.call(changesetEditor.changesetID(context.changeset.id).tags(context.changeset.tags)); // Warnings
+               function int64add5(dst, a, b, c, d, e) {
+                 var w0 = (a.l & 0xffff) + (b.l & 0xffff) + (c.l & 0xffff) + (d.l & 0xffff) + (e.l & 0xffff),
+                     w1 = (a.l >>> 16) + (b.l >>> 16) + (c.l >>> 16) + (d.l >>> 16) + (e.l >>> 16) + (w0 >>> 16),
+                     w2 = (a.h & 0xffff) + (b.h & 0xffff) + (c.h & 0xffff) + (d.h & 0xffff) + (e.h & 0xffff) + (w1 >>> 16),
+                     w3 = (a.h >>> 16) + (b.h >>> 16) + (c.h >>> 16) + (d.h >>> 16) + (e.h >>> 16) + (w2 >>> 16);
+                 dst.l = w0 & 0xffff | w1 << 16;
+                 dst.h = w2 & 0xffff | w3 << 16;
+               }
+             },
 
-           body.call(commitWarnings); // Upload Explanation
+             /**
+              * @class Hashes.RMD160
+              * @constructor
+              * @param {Object} [config]
+              *
+              * A JavaScript implementation of the RIPEMD-160 Algorithm
+              * Version 2.2 Copyright Jeremy Lin, Paul Johnston 2000 - 2009.
+              * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+              * See http://pajhome.org.uk/crypt/md5 for details.
+              * Also http://www.ocf.berkeley.edu/~jjlin/jsotp/
+              */
+             RMD160: function RMD160(options) {
+               /**
+                * Private properties configuration variables. You may need to tweak these to be compatible with
+                * the server-side, but the defaults work in most cases.
+                * @see this.setUpperCase() method
+                * @see this.setPad() method
+                */
+               options && typeof options.uppercase === 'boolean' ? options.uppercase : false;
 
-           var saveSection = body.selectAll('.save-section').data([0]);
-           saveSection = saveSection.enter().append('div').attr('class', 'modal-section save-section fillL').merge(saveSection);
-           var prose = saveSection.selectAll('.commit-info').data([0]);
+               var /* hexadecimal output case format. false - lowercase; true - uppercase  */
+               b64pad = options && typeof options.pad === 'string' ? options.pa : '=',
 
-           if (prose.enter().size()) {
-             // first time, make sure to update user details in prose
-             _userDetails = null;
-           }
+               /* base-64 pad character. Default '=' for strict RFC compliance   */
+               utf8 = options && typeof options.utf8 === 'boolean' ? options.utf8 : true,
 
-           prose = prose.enter().append('p').attr('class', 'commit-info').html(_t.html('commit.upload_explanation')).merge(prose); // always check if this has changed, but only update prose.html()
-           // if needed, because it can trigger a style recalculation
+               /* enable/disable utf8 encoding */
+               rmd160_r1 = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 7, 4, 13, 1, 10, 6, 15, 3, 12, 0, 9, 5, 2, 14, 11, 8, 3, 10, 14, 4, 9, 15, 8, 1, 2, 7, 0, 6, 13, 11, 5, 12, 1, 9, 11, 10, 0, 8, 12, 4, 13, 3, 7, 15, 14, 5, 6, 2, 4, 0, 5, 9, 7, 12, 2, 10, 14, 1, 3, 8, 11, 6, 15, 13],
+                   rmd160_r2 = [5, 14, 7, 0, 9, 2, 11, 4, 13, 6, 15, 8, 1, 10, 3, 12, 6, 11, 3, 7, 0, 13, 5, 10, 14, 15, 8, 12, 4, 9, 1, 2, 15, 5, 1, 3, 7, 14, 6, 9, 11, 8, 12, 2, 10, 0, 4, 13, 8, 6, 4, 1, 3, 11, 15, 0, 5, 12, 2, 13, 9, 7, 10, 14, 12, 15, 10, 4, 1, 5, 8, 7, 6, 2, 13, 14, 0, 3, 9, 11],
+                   rmd160_s1 = [11, 14, 15, 12, 5, 8, 7, 9, 11, 13, 14, 15, 6, 7, 9, 8, 7, 6, 8, 13, 11, 9, 7, 15, 7, 12, 15, 9, 11, 7, 13, 12, 11, 13, 6, 7, 14, 9, 13, 15, 14, 8, 13, 6, 5, 12, 7, 5, 11, 12, 14, 15, 14, 15, 9, 8, 9, 14, 5, 6, 8, 6, 5, 12, 9, 15, 5, 11, 6, 8, 13, 12, 5, 12, 13, 14, 11, 8, 5, 6],
+                   rmd160_s2 = [8, 9, 9, 11, 13, 15, 15, 5, 7, 7, 8, 11, 14, 14, 12, 6, 9, 13, 15, 7, 12, 8, 9, 11, 7, 7, 12, 7, 6, 15, 13, 11, 9, 7, 15, 11, 8, 6, 6, 14, 12, 13, 5, 14, 13, 13, 7, 5, 15, 5, 8, 11, 14, 14, 6, 14, 6, 9, 12, 9, 12, 5, 15, 8, 8, 5, 12, 9, 12, 5, 14, 6, 8, 13, 6, 5, 15, 13, 11, 11];
+               /* privileged (public) methods */
 
-           osm.userDetails(function (err, user) {
-             if (err) return;
-             if (_userDetails === user) return; // no change
+               this.hex = function (s) {
+                 return rstr2hex(rstr(s));
+               };
 
-             _userDetails = user;
-             var userLink = select(document.createElement('div'));
+               this.b64 = function (s) {
+                 return rstr2b64(rstr(s), b64pad);
+               };
 
-             if (user.image_url) {
-               userLink.append('img').attr('src', user.image_url).attr('class', 'icon pre-text user-icon');
-             }
+               this.any = function (s, e) {
+                 return rstr2any(rstr(s), e);
+               };
 
-             userLink.append('a').attr('class', 'user-info').html(user.display_name).attr('href', osm.userURL(user.display_name)).attr('target', '_blank');
-             prose.html(_t.html('commit.upload_explanation_with_user', {
-               user: userLink.html()
-             }));
-           }); // Request Review
+               this.raw = function (s) {
+                 return rstr(s);
+               };
 
-           var requestReview = saveSection.selectAll('.request-review').data([0]); // Enter
+               this.hex_hmac = function (k, d) {
+                 return rstr2hex(rstr_hmac(k, d));
+               };
 
-           var requestReviewEnter = requestReview.enter().append('div').attr('class', 'request-review');
-           var requestReviewDomId = utilUniqueDomId('commit-input-request-review');
-           var labelEnter = requestReviewEnter.append('label').attr('for', requestReviewDomId);
-           labelEnter.append('input').attr('type', 'checkbox').attr('id', requestReviewDomId);
-           labelEnter.append('span').html(_t.html('commit.request_review')); // Update
+               this.b64_hmac = function (k, d) {
+                 return rstr2b64(rstr_hmac(k, d), b64pad);
+               };
 
-           requestReview = requestReview.merge(requestReviewEnter);
-           var requestReviewInput = requestReview.selectAll('input').property('checked', isReviewRequested(context.changeset.tags)).on('change', toggleRequestReview); // Buttons
+               this.any_hmac = function (k, d, e) {
+                 return rstr2any(rstr_hmac(k, d), e);
+               };
+               /**
+                * Perform a simple self-test to see if the VM is working
+                * @return {String} Hexadecimal hash sample
+                * @public
+                */
 
-           var buttonSection = saveSection.selectAll('.buttons').data([0]); // enter
 
-           var buttonEnter = buttonSection.enter().append('div').attr('class', 'buttons fillL');
-           buttonEnter.append('button').attr('class', 'secondary-action button cancel-button').append('span').attr('class', 'label').html(_t.html('commit.cancel'));
-           var uploadButton = buttonEnter.append('button').attr('class', 'action button save-button');
-           uploadButton.append('span').attr('class', 'label').html(_t.html('commit.save'));
-           var uploadBlockerTooltipText = getUploadBlockerMessage(); // update
+               this.vm_test = function () {
+                 return hex('abc').toLowerCase() === '900150983cd24fb0d6963f7d28e17f72';
+               };
+               /**
+                * @description Enable/disable uppercase hexadecimal returned string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           buttonSection = buttonSection.merge(buttonEnter);
-           buttonSection.selectAll('.cancel-button').on('click.cancel', function () {
-             dispatch$1.call('cancel', this);
-           });
-           buttonSection.selectAll('.save-button').classed('disabled', uploadBlockerTooltipText !== null).on('click.save', function () {
-             if (!select(this).classed('disabled')) {
-               this.blur(); // avoid keeping focus on the button - #4641
 
-               for (var key in context.changeset.tags) {
-                 // remove any empty keys before upload
-                 if (!key) delete context.changeset.tags[key];
-               }
+               this.setUpperCase = function (a) {
 
-               context.uploader().save(context.changeset);
-             }
-           }); // remove any existing tooltip
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {string} Pad
+                * @return {Object} this
+                * @public
+                */
 
-           uiTooltip().destroyAny(buttonSection.selectAll('.save-button'));
 
-           if (uploadBlockerTooltipText) {
-             buttonSection.selectAll('.save-button').call(uiTooltip().title(uploadBlockerTooltipText).placement('top'));
-           } // Raw Tag Editor
+               this.setPad = function (a) {
+                 if (typeof a !== 'undefined') {
+                   b64pad = a;
+                 }
 
+                 return this;
+               };
+               /**
+                * @description Defines a base64 pad string
+                * @param {boolean}
+                * @return {Object} this
+                * @public
+                */
 
-           var tagSection = body.selectAll('.tag-section.raw-tag-editor').data([0]);
-           tagSection = tagSection.enter().append('div').attr('class', 'modal-section tag-section raw-tag-editor').merge(tagSection);
-           tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
-           .render);
-           var changesSection = body.selectAll('.commit-changes-section').data([0]);
-           changesSection = changesSection.enter().append('div').attr('class', 'modal-section commit-changes-section').merge(changesSection); // Change summary
 
-           changesSection.call(commitChanges.render);
+               this.setUTF8 = function (a) {
+                 if (typeof a === 'boolean') {
+                   utf8 = a;
+                 }
 
-           function toggleRequestReview() {
-             var rr = requestReviewInput.property('checked');
-             updateChangeset({
-               review_requested: rr ? 'yes' : undefined
-             });
-             tagSection.call(rawTagEditor.tags(Object.assign({}, context.changeset.tags)) // shallow copy
-             .render);
-           }
-         }
+                 return this;
+               };
+               /* private methods */
 
-         function getUploadBlockerMessage() {
-           var errors = context.validator().getIssuesBySeverity({
-             what: 'edited',
-             where: 'all'
-           }).error;
+               /**
+                * Calculate the rmd160 of a raw string
+                */
 
-           if (errors.length) {
-             return _t('commit.outstanding_errors_message', {
-               count: errors.length
-             });
-           } else {
-             var hasChangesetComment = context.changeset && context.changeset.tags.comment && context.changeset.tags.comment.trim().length;
 
-             if (!hasChangesetComment) {
-               return _t('commit.comment_needed_message');
-             }
-           }
+               function rstr(s) {
+                 s = utf8 ? utf8Encode(s) : s;
+                 return binl2rstr(binl(rstr2binl(s), s.length * 8));
+               }
+               /**
+                * Calculate the HMAC-rmd160 of a key and some data (raw strings)
+                */
 
-           return null;
-         }
 
-         function changeTags(_, changed, onInput) {
-           if (changed.hasOwnProperty('comment')) {
-             if (changed.comment === undefined) {
-               changed.comment = '';
-             }
+               function rstr_hmac(key, data) {
+                 key = utf8 ? utf8Encode(key) : key;
+                 data = utf8 ? utf8Encode(data) : data;
+                 var i,
+                     hash,
+                     bkey = rstr2binl(key),
+                     ipad = Array(16),
+                     opad = Array(16);
 
-             if (!onInput) {
-               corePreferences('comment', changed.comment);
-               corePreferences('commentDate', Date.now());
-             }
-           }
+                 if (bkey.length > 16) {
+                   bkey = binl(bkey, key.length * 8);
+                 }
 
-           if (changed.hasOwnProperty('source')) {
-             if (changed.source === undefined) {
-               corePreferences('source', null);
-             } else if (!onInput) {
-               corePreferences('source', changed.source);
-               corePreferences('commentDate', Date.now());
-             }
-           } // no need to update `prefs` for `hashtags` here since it's done in `updateChangeset`
+                 for (i = 0; i < 16; i += 1) {
+                   ipad[i] = bkey[i] ^ 0x36363636;
+                   opad[i] = bkey[i] ^ 0x5C5C5C5C;
+                 }
 
+                 hash = binl(ipad.concat(rstr2binl(data)), 512 + data.length * 8);
+                 return binl2rstr(binl(opad.concat(hash), 512 + 160));
+               }
+               /**
+                * Convert an array of little-endian words to a string
+                */
 
-           updateChangeset(changed, onInput);
 
-           if (_selection) {
-             _selection.call(render);
-           }
-         }
+               function binl2rstr(input) {
+                 var i,
+                     output = '',
+                     l = input.length * 32;
 
-         function findHashtags(tags, commentOnly) {
-           var detectedHashtags = commentHashtags();
+                 for (i = 0; i < l; i += 8) {
+                   output += String.fromCharCode(input[i >> 5] >>> i % 32 & 0xFF);
+                 }
 
-           if (detectedHashtags.length) {
-             // always remove stored hashtags if there are hashtags in the comment - #4304
-             corePreferences('hashtags', null);
-           }
+                 return output;
+               }
+               /**
+                * Calculate the RIPE-MD160 of an array of little-endian words, and a bit length.
+                */
 
-           if (!detectedHashtags.length || !commentOnly) {
-             detectedHashtags = detectedHashtags.concat(hashtagHashtags());
-           }
 
-           var allLowerCase = new Set();
-           return detectedHashtags.filter(function (hashtag) {
-             // Compare tags as lowercase strings, but keep original case tags
-             var lowerCase = hashtag.toLowerCase();
+               function binl(x, len) {
+                 var T,
+                     j,
+                     i,
+                     l,
+                     h0 = 0x67452301,
+                     h1 = 0xefcdab89,
+                     h2 = 0x98badcfe,
+                     h3 = 0x10325476,
+                     h4 = 0xc3d2e1f0,
+                     A1,
+                     B1,
+                     C1,
+                     D1,
+                     E1,
+                     A2,
+                     B2,
+                     C2,
+                     D2,
+                     E2;
+                 /* append padding */
 
-             if (!allLowerCase.has(lowerCase)) {
-               allLowerCase.add(lowerCase);
-               return true;
-             }
+                 x[len >> 5] |= 0x80 << len % 32;
+                 x[(len + 64 >>> 9 << 4) + 14] = len;
+                 l = x.length;
 
-             return false;
-           }); // Extract hashtags from `comment`
+                 for (i = 0; i < l; i += 16) {
+                   A1 = A2 = h0;
+                   B1 = B2 = h1;
+                   C1 = C2 = h2;
+                   D1 = D2 = h3;
+                   E1 = E2 = h4;
 
-           function commentHashtags() {
-             var matches = (tags.comment || '').replace(/http\S*/g, '') // drop anything that looks like a URL - #4289
-             .match(hashtagRegex);
-             return matches || [];
-           } // Extract and clean hashtags from `hashtags`
+                   for (j = 0; j <= 79; j += 1) {
+                     T = safe_add(A1, rmd160_f(j, B1, C1, D1));
+                     T = safe_add(T, x[i + rmd160_r1[j]]);
+                     T = safe_add(T, rmd160_K1(j));
+                     T = safe_add(bit_rol(T, rmd160_s1[j]), E1);
+                     A1 = E1;
+                     E1 = D1;
+                     D1 = bit_rol(C1, 10);
+                     C1 = B1;
+                     B1 = T;
+                     T = safe_add(A2, rmd160_f(79 - j, B2, C2, D2));
+                     T = safe_add(T, x[i + rmd160_r2[j]]);
+                     T = safe_add(T, rmd160_K2(j));
+                     T = safe_add(bit_rol(T, rmd160_s2[j]), E2);
+                     A2 = E2;
+                     E2 = D2;
+                     D2 = bit_rol(C2, 10);
+                     C2 = B2;
+                     B2 = T;
+                   }
 
+                   T = safe_add(h1, safe_add(C1, D2));
+                   h1 = safe_add(h2, safe_add(D1, E2));
+                   h2 = safe_add(h3, safe_add(E1, A2));
+                   h3 = safe_add(h4, safe_add(A1, B2));
+                   h4 = safe_add(h0, safe_add(B1, C2));
+                   h0 = T;
+                 }
 
-           function hashtagHashtags() {
-             var matches = (tags.hashtags || '').split(/[,;\s]+/).map(function (s) {
-               if (s[0] !== '#') {
-                 s = '#' + s;
-               } // prepend '#'
+                 return [h0, h1, h2, h3, h4];
+               } // specific algorithm methods
 
 
-               var matched = s.match(hashtagRegex);
-               return matched && matched[0];
-             }).filter(Boolean); // exclude falsy
+               function rmd160_f(j, x, y, z) {
+                 return 0 <= j && j <= 15 ? x ^ y ^ z : 16 <= j && j <= 31 ? x & y | ~x & z : 32 <= j && j <= 47 ? (x | ~y) ^ z : 48 <= j && j <= 63 ? x & z | y & ~z : 64 <= j && j <= 79 ? x ^ (y | ~z) : 'rmd160_f: j out of range';
+               }
 
-             return matches || [];
-           }
-         }
+               function rmd160_K1(j) {
+                 return 0 <= j && j <= 15 ? 0x00000000 : 16 <= j && j <= 31 ? 0x5a827999 : 32 <= j && j <= 47 ? 0x6ed9eba1 : 48 <= j && j <= 63 ? 0x8f1bbcdc : 64 <= j && j <= 79 ? 0xa953fd4e : 'rmd160_K1: j out of range';
+               }
 
-         function isReviewRequested(tags) {
-           var rr = tags.review_requested;
-           if (rr === undefined) return false;
-           rr = rr.trim().toLowerCase();
-           return !(rr === '' || rr === 'no');
-         }
+               function rmd160_K2(j) {
+                 return 0 <= j && j <= 15 ? 0x50a28be6 : 16 <= j && j <= 31 ? 0x5c4dd124 : 32 <= j && j <= 47 ? 0x6d703ef3 : 48 <= j && j <= 63 ? 0x7a6d76e9 : 64 <= j && j <= 79 ? 0x00000000 : 'rmd160_K2: j out of range';
+               }
+             }
+           }; // exposes Hashes
 
-         function updateChangeset(changed, onInput) {
-           var tags = Object.assign({}, context.changeset.tags); // shallow copy
+           (function (window, undefined$1) {
+             var freeExports = false;
 
-           Object.keys(changed).forEach(function (k) {
-             var v = changed[k];
-             k = context.cleanTagKey(k);
-             if (readOnlyTags.indexOf(k) !== -1) return;
+             {
+               freeExports = exports;
 
-             if (v === undefined) {
-               delete tags[k];
-             } else if (onInput) {
-               tags[k] = v;
-             } else {
-               tags[k] = context.cleanTagValue(v);
+               if (exports && _typeof(commonjsGlobal) === 'object' && commonjsGlobal && commonjsGlobal === commonjsGlobal.global) {
+                 window = commonjsGlobal;
+               }
              }
-           });
-
-           if (!onInput) {
-             // when changing the comment, override hashtags with any found in comment.
-             var commentOnly = changed.hasOwnProperty('comment') && changed.comment !== '';
-             var arr = findHashtags(tags, commentOnly);
 
-             if (arr.length) {
-               tags.hashtags = context.cleanTagValue(arr.join(';'));
-               corePreferences('hashtags', tags.hashtags);
+             if (typeof undefined$1 === 'function' && _typeof(undefined$1.amd) === 'object' && undefined$1.amd) {
+               // define as an anonymous module, so, through path mapping, it can be aliased
+               undefined$1(function () {
+                 return Hashes;
+               });
+             } else if (freeExports) {
+               // in Node.js or RingoJS v0.8.0+
+               if (module && module.exports === freeExports) {
+                 module.exports = Hashes;
+               } // in Narwhal or RingoJS v0.7.0-
+               else {
+                 freeExports.Hashes = Hashes;
+               }
              } else {
-               delete tags.hashtags;
-               corePreferences('hashtags', null);
+               // in a browser or Rhino
+               window.Hashes = Hashes;
              }
-           } // always update userdetails, just in case user reauthenticates as someone else
-
-
-           if (_userDetails && _userDetails.changesets_count !== undefined) {
-             var changesetsCount = parseInt(_userDetails.changesets_count, 10) + 1; // #4283
-
-             tags.changesets_count = String(changesetsCount); // first 100 edits - new user
+           })(this);
+         })(); // IIFE
 
-             if (changesetsCount <= 100) {
-               var s;
-               s = corePreferences('walkthrough_completed');
+       })(hashes$1, hashes$1.exports);
 
-               if (s) {
-                 tags['ideditor:walkthrough_completed'] = s;
-               }
+       var hashes = hashes$1.exports,
+           sha1 = new hashes.SHA1(); // # xtend
 
-               s = corePreferences('walkthrough_progress');
+       var hasOwnProperty$1 = Object.prototype.hasOwnProperty;
 
-               if (s) {
-                 tags['ideditor:walkthrough_progress'] = s;
-               }
+       function xtend$1() {
+         var target = {};
 
-               s = corePreferences('walkthrough_started');
+         for (var i = 0; i < arguments.length; i++) {
+           var source = arguments[i];
 
-               if (s) {
-                 tags['ideditor:walkthrough_started'] = s;
-               }
+           for (var key in source) {
+             if (hasOwnProperty$1.call(source, key)) {
+               target[key] = source[key];
              }
-           } else {
-             delete tags.changesets_count;
-           }
-
-           if (!fastDeepEqual(context.changeset.tags, tags)) {
-             context.changeset = context.changeset.update({
-               tags: tags
-             });
            }
          }
 
-         commit.reset = function () {
-           context.changeset = null;
-         };
-
-         return utilRebind(commit, dispatch$1, 'on');
+         return target;
        }
 
-       var globalIsFinite = global_1.isFinite;
+       var ohauth$1 = {};
 
-       // `Number.isFinite` method
-       // https://tc39.github.io/ecma262/#sec-number.isfinite
-       var numberIsFinite = Number.isFinite || function isFinite(it) {
-         return typeof it == 'number' && globalIsFinite(it);
+       ohauth$1.qsString = function (obj) {
+         return Object.keys(obj).sort().map(function (key) {
+           return ohauth$1.percentEncode(key) + '=' + ohauth$1.percentEncode(obj[key]);
+         }).join('&');
        };
 
-       // `Number.isFinite` method
-       // https://tc39.github.io/ecma262/#sec-number.isfinite
-       _export({ target: 'Number', stat: true }, { isFinite: numberIsFinite });
-
-       var RADIUS = 6378137;
-       var FLATTENING = 1 / 298.257223563;
-       var POLAR_RADIUS$1 = 6356752.3142;
-       var wgs84 = {
-         RADIUS: RADIUS,
-         FLATTENING: FLATTENING,
-         POLAR_RADIUS: POLAR_RADIUS$1
+       ohauth$1.stringQs = function (str) {
+         return str.split('&').filter(function (pair) {
+           return pair !== '';
+         }).reduce(function (obj, pair) {
+           var parts = pair.split('=');
+           obj[decodeURIComponent(parts[0])] = null === parts[1] ? '' : decodeURIComponent(parts[1]);
+           return obj;
+         }, {});
        };
 
-       var geometry_1 = geometry;
-       var ring = ringArea;
+       ohauth$1.rawxhr = function (method, url, data, headers, callback) {
+         var xhr = new XMLHttpRequest(),
+             twoHundred = /^20\d$/;
 
-       function geometry(_) {
-         var area = 0,
-             i;
+         xhr.onreadystatechange = function () {
+           if (4 === xhr.readyState && 0 !== xhr.status) {
+             if (twoHundred.test(xhr.status)) callback(null, xhr);else return callback(xhr, null);
+           }
+         };
 
-         switch (_.type) {
-           case 'Polygon':
-             return polygonArea(_.coordinates);
+         xhr.onerror = function (e) {
+           return callback(e, null);
+         };
 
-           case 'MultiPolygon':
-             for (i = 0; i < _.coordinates.length; i++) {
-               area += polygonArea(_.coordinates[i]);
-             }
+         xhr.open(method, url, true);
 
-             return area;
+         for (var h in headers) {
+           xhr.setRequestHeader(h, headers[h]);
+         }
 
-           case 'Point':
-           case 'MultiPoint':
-           case 'LineString':
-           case 'MultiLineString':
-             return 0;
+         xhr.send(data);
+         return xhr;
+       };
 
-           case 'GeometryCollection':
-             for (i = 0; i < _.geometries.length; i++) {
-               area += geometry(_.geometries[i]);
-             }
+       ohauth$1.xhr = function (method, url, auth, data, options, callback) {
+         var headers = options && options.header || {
+           'Content-Type': 'application/x-www-form-urlencoded'
+         };
+         headers.Authorization = 'OAuth ' + ohauth$1.authHeader(auth);
+         return ohauth$1.rawxhr(method, url, data, headers, callback);
+       };
 
-             return area;
+       ohauth$1.nonce = function () {
+         for (var o = ''; o.length < 6;) {
+           o += '0123456789ABCDEFGHIJKLMNOPQRSTUVWXTZabcdefghiklmnopqrstuvwxyz'[Math.floor(Math.random() * 61)];
          }
-       }
 
-       function polygonArea(coords) {
-         var area = 0;
+         return o;
+       };
 
-         if (coords && coords.length > 0) {
-           area += Math.abs(ringArea(coords[0]));
+       ohauth$1.authHeader = function (obj) {
+         return Object.keys(obj).sort().map(function (key) {
+           return encodeURIComponent(key) + '="' + encodeURIComponent(obj[key]) + '"';
+         }).join(', ');
+       };
 
-           for (var i = 1; i < coords.length; i++) {
-             area -= Math.abs(ringArea(coords[i]));
-           }
-         }
+       ohauth$1.timestamp = function () {
+         return ~~(+new Date() / 1000);
+       };
 
-         return area;
-       }
+       ohauth$1.percentEncode = function (s) {
+         return encodeURIComponent(s).replace(/\!/g, '%21').replace(/\'/g, '%27').replace(/\*/g, '%2A').replace(/\(/g, '%28').replace(/\)/g, '%29');
+       };
+
+       ohauth$1.baseString = function (method, url, params) {
+         if (params.oauth_signature) delete params.oauth_signature;
+         return [method, ohauth$1.percentEncode(url), ohauth$1.percentEncode(ohauth$1.qsString(params))].join('&');
+       };
+
+       ohauth$1.signature = function (oauth_secret, token_secret, baseString) {
+         return sha1.b64_hmac(ohauth$1.percentEncode(oauth_secret) + '&' + ohauth$1.percentEncode(token_secret), baseString);
+       };
        /**
-        * Calculate the approximate area of the polygon were it projected onto
-        *     the earth.  Note that this area will be positive if ring is oriented
-        *     clockwise, otherwise it will be negative.
+        * Takes an options object for configuration (consumer_key,
+        * consumer_secret, version, signature_method, token, token_secret)
+        * and returns a function that generates the Authorization header
+        * for given data.
         *
-        * Reference:
-        * Robert. G. Chamberlain and William H. Duquette, "Some Algorithms for
-        *     Polygons on a Sphere", JPL Publication 07-03, Jet Propulsion
-        *     Laboratory, Pasadena, CA, June 2007 http://trs-new.jpl.nasa.gov/dspace/handle/2014/40409
+        * The returned function takes these parameters:
+        * - method: GET/POST/...
+        * - uri: full URI with protocol, port, path and query string
+        * - extra_params: any extra parameters (that are passed in the POST data),
+        *   can be an object or a from-urlencoded string.
         *
-        * Returns:
-        * {float} The approximate signed geodesic area of the polygon in square
-        *     meters.
+        * Returned function returns full OAuth header with "OAuth" string in it.
         */
 
 
-       function ringArea(coords) {
-         var p1,
-             p2,
-             p3,
-             lowerIndex,
-             middleIndex,
-             upperIndex,
-             i,
-             area = 0,
-             coordsLength = coords.length;
-
-         if (coordsLength > 2) {
-           for (i = 0; i < coordsLength; i++) {
-             if (i === coordsLength - 2) {
-               // i = N-2
-               lowerIndex = coordsLength - 2;
-               middleIndex = coordsLength - 1;
-               upperIndex = 0;
-             } else if (i === coordsLength - 1) {
-               // i = N-1
-               lowerIndex = coordsLength - 1;
-               middleIndex = 0;
-               upperIndex = 1;
-             } else {
-               // i = 0 to N-3
-               lowerIndex = i;
-               middleIndex = i + 1;
-               upperIndex = i + 2;
-             }
+       ohauth$1.headerGenerator = function (options) {
+         options = options || {};
+         var consumer_key = options.consumer_key || '',
+             consumer_secret = options.consumer_secret || '',
+             signature_method = options.signature_method || 'HMAC-SHA1',
+             version = options.version || '1.0',
+             token = options.token || '',
+             token_secret = options.token_secret || '';
+         return function (method, uri, extra_params) {
+           method = method.toUpperCase();
 
-             p1 = coords[lowerIndex];
-             p2 = coords[middleIndex];
-             p3 = coords[upperIndex];
-             area += (rad(p3[0]) - rad(p1[0])) * Math.sin(rad(p2[1]));
+           if (typeof extra_params === 'string' && extra_params.length > 0) {
+             extra_params = ohauth$1.stringQs(extra_params);
            }
 
-           area = area * wgs84.RADIUS * wgs84.RADIUS / 2;
-         }
+           var uri_parts = uri.split('?', 2),
+               base_uri = uri_parts[0];
+           var query_params = uri_parts.length === 2 ? ohauth$1.stringQs(uri_parts[1]) : {};
+           var oauth_params = {
+             oauth_consumer_key: consumer_key,
+             oauth_signature_method: signature_method,
+             oauth_version: version,
+             oauth_timestamp: ohauth$1.timestamp(),
+             oauth_nonce: ohauth$1.nonce()
+           };
+           if (token) oauth_params.oauth_token = token;
+           var all_params = xtend$1({}, oauth_params, query_params, extra_params),
+               base_str = ohauth$1.baseString(method, base_uri, all_params);
+           oauth_params.oauth_signature = ohauth$1.signature(consumer_secret, token_secret, base_str);
+           return 'OAuth ' + ohauth$1.authHeader(oauth_params);
+         };
+       };
 
-         return area;
-       }
+       var ohauth_1 = ohauth$1;
 
-       function rad(_) {
-         return _ * Math.PI / 180;
-       }
+       var resolveUrl$1 = {exports: {}};
 
-       var geojsonArea = {
-         geometry: geometry_1,
-         ring: ring
-       };
+       (function (module, exports) {
+         // Copyright 2014 Simon Lydell
+         // X11 (“MIT”) Licensed. (See LICENSE.)
+         void function (root, factory) {
+           {
+             module.exports = factory();
+           }
+         }(commonjsGlobal, function () {
+           function
+             /* ...urls */
+           resolveUrl() {
+             var numUrls = arguments.length;
 
-       function toRadians(angleInDegrees) {
-         return angleInDegrees * Math.PI / 180;
-       }
+             if (numUrls === 0) {
+               throw new Error("resolveUrl requires at least one argument; got none.");
+             }
 
-       function toDegrees(angleInRadians) {
-         return angleInRadians * 180 / Math.PI;
-       }
+             var base = document.createElement("base");
+             base.href = arguments[0];
 
-       function offset(c1, distance, bearing) {
-         var lat1 = toRadians(c1[1]);
-         var lon1 = toRadians(c1[0]);
-         var dByR = distance / 6378137; // distance divided by 6378137 (radius of the earth) wgs84
+             if (numUrls === 1) {
+               return base.href;
+             }
 
-         var lat = Math.asin(Math.sin(lat1) * Math.cos(dByR) + Math.cos(lat1) * Math.sin(dByR) * Math.cos(bearing));
-         var lon = lon1 + Math.atan2(Math.sin(bearing) * Math.sin(dByR) * Math.cos(lat1), Math.cos(dByR) - Math.sin(lat1) * Math.sin(lat));
-         return [toDegrees(lon), toDegrees(lat)];
-       }
+             var head = document.getElementsByTagName("head")[0];
+             head.insertBefore(base, head.firstChild);
+             var a = document.createElement("a");
+             var resolved;
 
-       function validateCenter(center) {
-         var validCenterLengths = [2, 3];
+             for (var index = 1; index < numUrls; index++) {
+               a.href = arguments[index];
+               resolved = a.href;
+               base.href = resolved;
+             }
 
-         if (!Array.isArray(center) || !validCenterLengths.includes(center.length)) {
-           throw new Error("ERROR! Center has to be an array of length two or three");
-         }
+             head.removeChild(base);
+             return resolved;
+           }
 
-         var _center = _slicedToArray(center, 2),
-             lng = _center[0],
-             lat = _center[1];
+           return resolveUrl;
+         });
+       })(resolveUrl$1);
 
-         if (typeof lng !== "number" || typeof lat !== "number") {
-           throw new Error("ERROR! Longitude and Latitude has to be numbers but where ".concat(_typeof(lng), " and ").concat(_typeof(lat)));
-         }
+       var assign = make_assign();
+       var create$1 = make_create();
+       var trim$1 = make_trim();
+       var Global$5 = typeof window !== 'undefined' ? window : commonjsGlobal;
+       var util$6 = {
+         assign: assign,
+         create: create$1,
+         trim: trim$1,
+         bind: bind$1,
+         slice: slice$1,
+         each: each$7,
+         map: map,
+         pluck: pluck$1,
+         isList: isList$1,
+         isFunction: isFunction$1,
+         isObject: isObject$1,
+         Global: Global$5
+       };
 
-         if (lng > 180 || lng < -180) {
-           throw new Error("ERROR! Longitude has to be between -180 and 180 but was ".concat(lng));
-         }
+       function make_assign() {
+         if (Object.assign) {
+           return Object.assign;
+         } else {
+           return function shimAssign(obj, props1, props2, etc) {
+             for (var i = 1; i < arguments.length; i++) {
+               each$7(Object(arguments[i]), function (val, key) {
+                 obj[key] = val;
+               });
+             }
 
-         if (lat > 90 || lat < -90) {
-           throw new Error("ERROR! Latitude has to be between -90 and 90 but was ".concat(lat));
+             return obj;
+           };
          }
        }
 
-       function validateRadius(radius) {
-         if (typeof radius !== "number") {
-           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(_typeof(radius)));
-         }
+       function make_create() {
+         if (Object.create) {
+           return function create(obj, assignProps1, assignProps2, etc) {
+             var assignArgsList = slice$1(arguments, 1);
+             return assign.apply(this, [Object.create(obj)].concat(assignArgsList));
+           };
+         } else {
+           var F = function F() {}; // eslint-disable-line no-inner-declarations
 
-         if (radius <= 0) {
-           throw new Error("ERROR! Radius has to be a positive number but was: ".concat(radius));
-         }
-       }
 
-       function validateNumberOfSegments(numberOfSegments) {
-         if (typeof numberOfSegments !== "number" && numberOfSegments !== undefined) {
-           throw new Error("ERROR! Number of segments has to be a number but was: ".concat(_typeof(numberOfSegments)));
+           return function create(obj, assignProps1, assignProps2, etc) {
+             var assignArgsList = slice$1(arguments, 1);
+             F.prototype = obj;
+             return assign.apply(this, [new F()].concat(assignArgsList));
+           };
          }
+       }
 
-         if (numberOfSegments < 3) {
-           throw new Error("ERROR! Number of segments has to be at least 3 but was: ".concat(numberOfSegments));
+       function make_trim() {
+         if (String.prototype.trim) {
+           return function trim(str) {
+             return String.prototype.trim.call(str);
+           };
+         } else {
+           return function trim(str) {
+             return str.replace(/^[\s\uFEFF\xA0]+|[\s\uFEFF\xA0]+$/g, '');
+           };
          }
        }
 
-       function validateInput(_ref) {
-         var center = _ref.center,
-             radius = _ref.radius,
-             numberOfSegments = _ref.numberOfSegments;
-         validateCenter(center);
-         validateRadius(radius);
-         validateNumberOfSegments(numberOfSegments);
+       function bind$1(obj, fn) {
+         return function () {
+           return fn.apply(obj, Array.prototype.slice.call(arguments, 0));
+         };
        }
 
-       var circleToPolygon = function circleToPolygon(center, radius, numberOfSegments) {
-         var n = numberOfSegments ? numberOfSegments : 32; // validateInput() throws error on invalid input and do nothing on valid input
+       function slice$1(arr, index) {
+         return Array.prototype.slice.call(arr, index || 0);
+       }
 
-         validateInput({
-           center: center,
-           radius: radius,
-           numberOfSegments: numberOfSegments
+       function each$7(obj, fn) {
+         pluck$1(obj, function (val, key) {
+           fn(val, key);
+           return false;
          });
-         var coordinates = [];
-
-         for (var i = 0; i < n; ++i) {
-           coordinates.push(offset(center, radius, 2 * Math.PI * -i / n));
-         }
-
-         coordinates.push(coordinates[0]);
-         return {
-           type: "Polygon",
-           coordinates: [coordinates]
-         };
-       };
-
-       // `Number.EPSILON` constant
-       // https://tc39.github.io/ecma262/#sec-number.epsilon
-       _export({ target: 'Number', stat: true }, {
-         EPSILON: Math.pow(2, -52)
-       });
-
-       /**
-        * splaytree v3.0.1
-        * Fast Splay tree for Node and browser
-        *
-        * @author Alexander Milevski <info@w8r.name>
-        * @license MIT
-        * @preserve
-        */
-       var Node$1 = function Node(key, data) {
-         _classCallCheck(this, Node);
-
-         this.next = null;
-         this.key = key;
-         this.data = data;
-         this.left = null;
-         this.right = null;
-       };
-       /* follows "An implementation of top-down splaying"
-        * by D. Sleator <sleator@cs.cmu.edu> March 1992
-        */
-
-
-       function DEFAULT_COMPARE$1(a, b) {
-         return a > b ? 1 : a < b ? -1 : 0;
        }
-       /**
-        * Simple top down splay, not requiring i to be in the tree t.
-        */
-
-
-       function splay(i, t, comparator) {
-         var N = new Node$1(null, null);
-         var l = N;
-         var r = N;
-
-         while (true) {
-           var cmp = comparator(i, t.key); //if (i < t.key) {
 
-           if (cmp < 0) {
-             if (t.left === null) break; //if (i < t.left.key) {
-
-             if (comparator(i, t.left.key) < 0) {
-               var y = t.left;
-               /* rotate right */
+       function map(obj, fn) {
+         var res = isList$1(obj) ? [] : {};
+         pluck$1(obj, function (v, k) {
+           res[k] = fn(v, k);
+           return false;
+         });
+         return res;
+       }
 
-               t.left = y.right;
-               y.right = t;
-               t = y;
-               if (t.left === null) break;
+       function pluck$1(obj, fn) {
+         if (isList$1(obj)) {
+           for (var i = 0; i < obj.length; i++) {
+             if (fn(obj[i], i)) {
+               return obj[i];
              }
-
-             r.left = t;
-             /* link right */
-
-             r = t;
-             t = t.left; //} else if (i > t.key) {
-           } else if (cmp > 0) {
-             if (t.right === null) break; //if (i > t.right.key) {
-
-             if (comparator(i, t.right.key) > 0) {
-               var _y = t.right;
-               /* rotate left */
-
-               t.right = _y.left;
-               _y.left = t;
-               t = _y;
-               if (t.right === null) break;
+           }
+         } else {
+           for (var key in obj) {
+             if (obj.hasOwnProperty(key)) {
+               if (fn(obj[key], key)) {
+                 return obj[key];
+               }
              }
-
-             l.right = t;
-             /* link left */
-
-             l = t;
-             t = t.right;
-           } else break;
+           }
          }
-         /* assemble */
+       }
 
+       function isList$1(val) {
+         return val != null && typeof val != 'function' && typeof val.length == 'number';
+       }
 
-         l.right = t.left;
-         r.left = t.right;
-         t.left = N.right;
-         t.right = N.left;
-         return t;
+       function isFunction$1(val) {
+         return val && {}.toString.call(val) === '[object Function]';
        }
 
-       function _insert(i, data, t, comparator) {
-         var node = new Node$1(i, data);
+       function isObject$1(val) {
+         return val && {}.toString.call(val) === '[object Object]';
+       }
 
-         if (t === null) {
-           node.left = node.right = null;
-           return node;
+       var util$5 = util$6;
+       var slice = util$5.slice;
+       var pluck = util$5.pluck;
+       var each$6 = util$5.each;
+       var bind = util$5.bind;
+       var create = util$5.create;
+       var isList = util$5.isList;
+       var isFunction = util$5.isFunction;
+       var isObject = util$5.isObject;
+       var storeEngine = {
+         createStore: _createStore
+       };
+       var storeAPI = {
+         version: '2.0.12',
+         enabled: false,
+         // get returns the value of the given key. If that value
+         // is undefined, it returns optionalDefaultValue instead.
+         get: function get(key, optionalDefaultValue) {
+           var data = this.storage.read(this._namespacePrefix + key);
+           return this._deserialize(data, optionalDefaultValue);
+         },
+         // set will store the given value at key and returns value.
+         // Calling set with value === undefined is equivalent to calling remove.
+         set: function set(key, value) {
+           if (value === undefined) {
+             return this.remove(key);
+           }
+
+           this.storage.write(this._namespacePrefix + key, this._serialize(value));
+           return value;
+         },
+         // remove deletes the key and value stored at the given key.
+         remove: function remove(key) {
+           this.storage.remove(this._namespacePrefix + key);
+         },
+         // each will call the given callback once for each key-value pair
+         // in this store.
+         each: function each(callback) {
+           var self = this;
+           this.storage.each(function (val, namespacedKey) {
+             callback.call(self, self._deserialize(val), (namespacedKey || '').replace(self._namespaceRegexp, ''));
+           });
+         },
+         // clearAll will remove all the stored key-value pairs in this store.
+         clearAll: function clearAll() {
+           this.storage.clearAll();
+         },
+         // additional functionality that can't live in plugins
+         // ---------------------------------------------------
+         // hasNamespace returns true if this store instance has the given namespace.
+         hasNamespace: function hasNamespace(namespace) {
+           return this._namespacePrefix == '__storejs_' + namespace + '_';
+         },
+         // createStore creates a store.js instance with the first
+         // functioning storage in the list of storage candidates,
+         // and applies the the given mixins to the instance.
+         createStore: function createStore() {
+           return _createStore.apply(this, arguments);
+         },
+         addPlugin: function addPlugin(plugin) {
+           this._addPlugin(plugin);
+         },
+         namespace: function namespace(_namespace) {
+           return _createStore(this.storage, this.plugins, _namespace);
          }
+       };
 
-         t = splay(i, t, comparator);
-         var cmp = comparator(i, t.key);
+       function _warn() {
+         var _console = typeof console == 'undefined' ? null : console;
 
-         if (cmp < 0) {
-           node.left = t.left;
-           node.right = t;
-           t.left = null;
-         } else if (cmp >= 0) {
-           node.right = t.right;
-           node.left = t;
-           t.right = null;
+         if (!_console) {
+           return;
          }
 
-         return node;
+         var fn = _console.warn ? _console.warn : _console.log;
+         fn.apply(_console, arguments);
        }
 
-       function _split(key, v, comparator) {
-         var left = null;
-         var right = null;
+       function _createStore(storages, plugins, namespace) {
+         if (!namespace) {
+           namespace = '';
+         }
 
-         if (v) {
-           v = splay(key, v, comparator);
-           var cmp = comparator(v.key, key);
+         if (storages && !isList(storages)) {
+           storages = [storages];
+         }
 
-           if (cmp === 0) {
-             left = v.left;
-             right = v.right;
-           } else if (cmp < 0) {
-             right = v.right;
-             v.right = null;
-             left = v;
-           } else {
-             left = v.left;
-             v.left = null;
-             right = v;
-           }
+         if (plugins && !isList(plugins)) {
+           plugins = [plugins];
          }
 
-         return {
-           left: left,
-           right: right
-         };
-       }
+         var namespacePrefix = namespace ? '__storejs_' + namespace + '_' : '';
+         var namespaceRegexp = namespace ? new RegExp('^' + namespacePrefix) : null;
+         var legalNamespaces = /^[a-zA-Z0-9_\-]*$/; // alpha-numeric + underscore and dash
 
-       function merge$4(left, right, comparator) {
-         if (right === null) return left;
-         if (left === null) return right;
-         right = splay(left.key, right, comparator);
-         right.left = left;
-         return right;
-       }
-       /**
-        * Prints level of the tree
-        */
+         if (!legalNamespaces.test(namespace)) {
+           throw new Error('store.js namespaces can only have alphanumerics + underscores and dashes');
+         }
 
+         var _privateStoreProps = {
+           _namespacePrefix: namespacePrefix,
+           _namespaceRegexp: namespaceRegexp,
+           _testStorage: function _testStorage(storage) {
+             try {
+               var testStr = '__storejs__test__';
+               storage.write(testStr, testStr);
+               var ok = storage.read(testStr) === testStr;
+               storage.remove(testStr);
+               return ok;
+             } catch (e) {
+               return false;
+             }
+           },
+           _assignPluginFnProp: function _assignPluginFnProp(pluginFnProp, propName) {
+             var oldFn = this[propName];
 
-       function printRow(root, prefix, isTail, out, printNode) {
-         if (root) {
-           out("".concat(prefix).concat(isTail ? '└── ' : '├── ').concat(printNode(root), "\n"));
-           var indent = prefix + (isTail ? '    ' : '│   ');
-           if (root.left) printRow(root.left, indent, false, out, printNode);
-           if (root.right) printRow(root.right, indent, true, out, printNode);
-         }
-       }
+             this[propName] = function pluginFn() {
+               var args = slice(arguments, 0);
+               var self = this; // super_fn calls the old function which was overwritten by
+               // this mixin.
 
-       var Tree = /*#__PURE__*/function () {
-         function Tree() {
-           var comparator = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : DEFAULT_COMPARE$1;
+               function super_fn() {
+                 if (!oldFn) {
+                   return;
+                 }
 
-           _classCallCheck(this, Tree);
+                 each$6(arguments, function (arg, i) {
+                   args[i] = arg;
+                 });
+                 return oldFn.apply(self, args);
+               } // Give mixing function access to super_fn by prefixing all mixin function
+               // arguments with super_fn.
 
-           this._root = null;
-           this._size = 0;
-           this._comparator = comparator;
-         }
-         /**
-          * Inserts a key, allows duplicates
-          */
 
+               var newFnArgs = [super_fn].concat(args);
+               return pluginFnProp.apply(self, newFnArgs);
+             };
+           },
+           _serialize: function _serialize(obj) {
+             return JSON.stringify(obj);
+           },
+           _deserialize: function _deserialize(strVal, defaultVal) {
+             if (!strVal) {
+               return defaultVal;
+             } // It is possible that a raw string value has been previously stored
+             // in a storage without using store.js, meaning it will be a raw
+             // string value instead of a JSON serialized string. By defaulting
+             // to the raw string value in case of a JSON parse error, we allow
+             // for past stored values to be forwards-compatible with store.js
 
-         _createClass(Tree, [{
-           key: "insert",
-           value: function insert(key, data) {
-             this._size++;
-             return this._root = _insert(key, data, this._root, this._comparator);
-           }
-           /**
-            * Adds a key, if it is not present in the tree
-            */
 
-         }, {
-           key: "add",
-           value: function add(key, data) {
-             var node = new Node$1(key, data);
+             var val = '';
 
-             if (this._root === null) {
-               node.left = node.right = null;
-               this._size++;
-               this._root = node;
+             try {
+               val = JSON.parse(strVal);
+             } catch (e) {
+               val = strVal;
              }
 
-             var comparator = this._comparator;
-             var t = splay(key, this._root, comparator);
-             var cmp = comparator(key, t.key);
-             if (cmp === 0) this._root = t;else {
-               if (cmp < 0) {
-                 node.left = t.left;
-                 node.right = t;
-                 t.left = null;
-               } else if (cmp > 0) {
-                 node.right = t.right;
-                 node.left = t;
-                 t.right = null;
-               }
+             return val !== undefined ? val : defaultVal;
+           },
+           _addStorage: function _addStorage(storage) {
+             if (this.enabled) {
+               return;
+             }
 
-               this._size++;
-               this._root = node;
+             if (this._testStorage(storage)) {
+               this.storage = storage;
+               this.enabled = true;
              }
-             return this._root;
-           }
-           /**
-            * @param  {Key} key
-            * @return {Node|null}
-            */
+           },
+           _addPlugin: function _addPlugin(plugin) {
+             var self = this; // If the plugin is an array, then add all plugins in the array.
+             // This allows for a plugin to depend on other plugins.
 
-         }, {
-           key: "remove",
-           value: function remove(key) {
-             this._root = this._remove(key, this._root, this._comparator);
-           }
-           /**
-            * Deletes i from the tree if it's there
-            */
+             if (isList(plugin)) {
+               each$6(plugin, function (plugin) {
+                 self._addPlugin(plugin);
+               });
+               return;
+             } // Keep track of all plugins we've seen so far, so that we
+             // don't add any of them twice.
 
-         }, {
-           key: "_remove",
-           value: function _remove(i, t, comparator) {
-             var x;
-             if (t === null) return null;
-             t = splay(i, t, comparator);
-             var cmp = comparator(i, t.key);
-
-             if (cmp === 0) {
-               /* found it */
-               if (t.left === null) {
-                 x = t.right;
-               } else {
-                 x = splay(i, t.left, comparator);
-                 x.right = t.right;
-               }
 
-               this._size--;
-               return x;
+             var seenPlugin = pluck(this.plugins, function (seenPlugin) {
+               return plugin === seenPlugin;
+             });
+
+             if (seenPlugin) {
+               return;
              }
 
-             return t;
-             /* It wasn't there */
-           }
-           /**
-            * Removes and returns the node with smallest key
-            */
+             this.plugins.push(plugin); // Check that the plugin is properly formed
 
-         }, {
-           key: "pop",
-           value: function pop() {
-             var node = this._root;
+             if (!isFunction(plugin)) {
+               throw new Error('Plugins must be function values that return objects');
+             }
 
-             if (node) {
-               while (node.left) {
-                 node = node.left;
+             var pluginProperties = plugin.call(this);
+
+             if (!isObject(pluginProperties)) {
+               throw new Error('Plugins must return an object of function properties');
+             } // Add the plugin function properties to this store instance.
+
+
+             each$6(pluginProperties, function (pluginFnProp, propName) {
+               if (!isFunction(pluginFnProp)) {
+                 throw new Error('Bad plugin property: ' + propName + ' from plugin ' + plugin.name + '. Plugins should only return functions.');
                }
 
-               this._root = splay(node.key, this._root, this._comparator);
-               this._root = this._remove(node.key, this._root, this._comparator);
-               return {
-                 key: node.key,
-                 data: node.data
-               };
-             }
+               self._assignPluginFnProp(pluginFnProp, propName);
+             });
+           },
+           // Put deprecated properties in the private API, so as to not expose it to accidential
+           // discovery through inspection of the store object.
+           // Deprecated: addStorage
+           addStorage: function addStorage(storage) {
+             _warn('store.addStorage(storage) is deprecated. Use createStore([storages])');
 
-             return null;
+             this._addStorage(storage);
            }
-           /**
-            * Find without splaying
-            */
+         };
+         var store = create(_privateStoreProps, storeAPI, {
+           plugins: []
+         });
+         store.raw = {};
+         each$6(store, function (prop, propName) {
+           if (isFunction(prop)) {
+             store.raw[propName] = bind(store, prop);
+           }
+         });
+         each$6(storages, function (storage) {
+           store._addStorage(storage);
+         });
+         each$6(plugins, function (plugin) {
+           store._addPlugin(plugin);
+         });
+         return store;
+       }
 
-         }, {
-           key: "findStatic",
-           value: function findStatic(key) {
-             var current = this._root;
-             var compare = this._comparator;
+       var util$4 = util$6;
+       var Global$4 = util$4.Global;
+       var localStorage_1 = {
+         name: 'localStorage',
+         read: read$5,
+         write: write$5,
+         each: each$5,
+         remove: remove$5,
+         clearAll: clearAll$5
+       };
 
-             while (current) {
-               var cmp = compare(key, current.key);
-               if (cmp === 0) return current;else if (cmp < 0) current = current.left;else current = current.right;
-             }
+       function localStorage$1() {
+         return Global$4.localStorage;
+       }
 
-             return null;
-           }
-         }, {
-           key: "find",
-           value: function find(key) {
-             if (this._root) {
-               this._root = splay(key, this._root, this._comparator);
-               if (this._comparator(key, this._root.key) !== 0) return null;
-             }
+       function read$5(key) {
+         return localStorage$1().getItem(key);
+       }
 
-             return this._root;
-           }
-         }, {
-           key: "contains",
-           value: function contains(key) {
-             var current = this._root;
-             var compare = this._comparator;
+       function write$5(key, data) {
+         return localStorage$1().setItem(key, data);
+       }
 
-             while (current) {
-               var cmp = compare(key, current.key);
-               if (cmp === 0) return true;else if (cmp < 0) current = current.left;else current = current.right;
-             }
+       function each$5(fn) {
+         for (var i = localStorage$1().length - 1; i >= 0; i--) {
+           var key = localStorage$1().key(i);
+           fn(read$5(key), key);
+         }
+       }
 
-             return false;
-           }
-         }, {
-           key: "forEach",
-           value: function forEach(visitor, ctx) {
-             var current = this._root;
-             var Q = [];
-             /* Initialize stack s */
-
-             var done = false;
-
-             while (!done) {
-               if (current !== null) {
-                 Q.push(current);
-                 current = current.left;
-               } else {
-                 if (Q.length !== 0) {
-                   current = Q.pop();
-                   visitor.call(ctx, current);
-                   current = current.right;
-                 } else done = true;
-               }
-             }
+       function remove$5(key) {
+         return localStorage$1().removeItem(key);
+       }
 
-             return this;
-           }
-           /**
-            * Walk key range from `low` to `high`. Stops if `fn` returns a value.
-            */
+       function clearAll$5() {
+         return localStorage$1().clear();
+       }
 
-         }, {
-           key: "range",
-           value: function range(low, high, fn, ctx) {
-             var Q = [];
-             var compare = this._comparator;
-             var node = this._root;
-             var cmp;
-
-             while (Q.length !== 0 || node) {
-               if (node) {
-                 Q.push(node);
-                 node = node.left;
-               } else {
-                 node = Q.pop();
-                 cmp = compare(node.key, high);
+       // versions 6 and 7, where no localStorage, etc
+       // is available.
+
+       var util$3 = util$6;
+       var Global$3 = util$3.Global;
+       var oldFFGlobalStorage = {
+         name: 'oldFF-globalStorage',
+         read: read$4,
+         write: write$4,
+         each: each$4,
+         remove: remove$4,
+         clearAll: clearAll$4
+       };
+       var globalStorage = Global$3.globalStorage;
 
-                 if (cmp > 0) {
-                   break;
-                 } else if (compare(node.key, low) >= 0) {
-                   if (fn.call(ctx, node)) return this; // stop if smth is returned
-                 }
+       function read$4(key) {
+         return globalStorage[key];
+       }
 
-                 node = node.right;
-               }
-             }
+       function write$4(key, data) {
+         globalStorage[key] = data;
+       }
 
-             return this;
-           }
-           /**
-            * Returns array of keys
-            */
+       function each$4(fn) {
+         for (var i = globalStorage.length - 1; i >= 0; i--) {
+           var key = globalStorage.key(i);
+           fn(globalStorage[key], key);
+         }
+       }
 
-         }, {
-           key: "keys",
-           value: function keys() {
-             var keys = [];
-             this.forEach(function (_ref) {
-               var key = _ref.key;
-               return keys.push(key);
-             });
-             return keys;
-           }
-           /**
-            * Returns array of all the data in the nodes
-            */
+       function remove$4(key) {
+         return globalStorage.removeItem(key);
+       }
 
-         }, {
-           key: "values",
-           value: function values() {
-             var values = [];
-             this.forEach(function (_ref2) {
-               var data = _ref2.data;
-               return values.push(data);
-             });
-             return values;
-           }
-         }, {
-           key: "min",
-           value: function min() {
-             if (this._root) return this.minNode(this._root).key;
-             return null;
-           }
-         }, {
-           key: "max",
-           value: function max() {
-             if (this._root) return this.maxNode(this._root).key;
-             return null;
-           }
-         }, {
-           key: "minNode",
-           value: function minNode() {
-             var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
-             if (t) while (t.left) {
-               t = t.left;
-             }
-             return t;
-           }
-         }, {
-           key: "maxNode",
-           value: function maxNode() {
-             var t = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this._root;
-             if (t) while (t.right) {
-               t = t.right;
-             }
-             return t;
-           }
-           /**
-            * Returns node at given index
-            */
+       function clearAll$4() {
+         each$4(function (key, _) {
+           delete globalStorage[key];
+         });
+       }
 
-         }, {
-           key: "at",
-           value: function at(index) {
-             var current = this._root;
-             var done = false;
-             var i = 0;
-             var Q = [];
+       // versions 6 and 7, where no localStorage, sessionStorage, etc
+       // is available.
 
-             while (!done) {
-               if (current) {
-                 Q.push(current);
-                 current = current.left;
-               } else {
-                 if (Q.length > 0) {
-                   current = Q.pop();
-                   if (i === index) return current;
-                   i++;
-                   current = current.right;
-                 } else done = true;
-               }
-             }
+       var util$2 = util$6;
+       var Global$2 = util$2.Global;
+       var oldIEUserDataStorage = {
+         name: 'oldIE-userDataStorage',
+         write: write$3,
+         read: read$3,
+         each: each$3,
+         remove: remove$3,
+         clearAll: clearAll$3
+       };
+       var storageName = 'storejs';
+       var doc$1 = Global$2.document;
 
-             return null;
-           }
-         }, {
-           key: "next",
-           value: function next(d) {
-             var root = this._root;
-             var successor = null;
+       var _withStorageEl = _makeIEStorageElFunction();
 
-             if (d.right) {
-               successor = d.right;
+       var disable = (Global$2.navigator ? Global$2.navigator.userAgent : '').match(/ (MSIE 8|MSIE 9|MSIE 10)\./); // MSIE 9.x, MSIE 10.x
 
-               while (successor.left) {
-                 successor = successor.left;
-               }
+       function write$3(unfixedKey, data) {
+         if (disable) {
+           return;
+         }
 
-               return successor;
-             }
+         var fixedKey = fixKey(unfixedKey);
 
-             var comparator = this._comparator;
+         _withStorageEl(function (storageEl) {
+           storageEl.setAttribute(fixedKey, data);
+           storageEl.save(storageName);
+         });
+       }
 
-             while (root) {
-               var cmp = comparator(d.key, root.key);
-               if (cmp === 0) break;else if (cmp < 0) {
-                 successor = root;
-                 root = root.left;
-               } else root = root.right;
-             }
+       function read$3(unfixedKey) {
+         if (disable) {
+           return;
+         }
 
-             return successor;
-           }
-         }, {
-           key: "prev",
-           value: function prev(d) {
-             var root = this._root;
-             var predecessor = null;
+         var fixedKey = fixKey(unfixedKey);
+         var res = null;
 
-             if (d.left !== null) {
-               predecessor = d.left;
+         _withStorageEl(function (storageEl) {
+           res = storageEl.getAttribute(fixedKey);
+         });
 
-               while (predecessor.right) {
-                 predecessor = predecessor.right;
-               }
+         return res;
+       }
 
-               return predecessor;
-             }
+       function each$3(callback) {
+         _withStorageEl(function (storageEl) {
+           var attributes = storageEl.XMLDocument.documentElement.attributes;
 
-             var comparator = this._comparator;
+           for (var i = attributes.length - 1; i >= 0; i--) {
+             var attr = attributes[i];
+             callback(storageEl.getAttribute(attr.name), attr.name);
+           }
+         });
+       }
 
-             while (root) {
-               var cmp = comparator(d.key, root.key);
-               if (cmp === 0) break;else if (cmp < 0) root = root.left;else {
-                 predecessor = root;
-                 root = root.right;
-               }
-             }
+       function remove$3(unfixedKey) {
+         var fixedKey = fixKey(unfixedKey);
 
-             return predecessor;
-           }
-         }, {
-           key: "clear",
-           value: function clear() {
-             this._root = null;
-             this._size = 0;
-             return this;
-           }
-         }, {
-           key: "toList",
-           value: function toList() {
-             return _toList(this._root);
-           }
-           /**
-            * Bulk-load items. Both array have to be same size
-            */
+         _withStorageEl(function (storageEl) {
+           storageEl.removeAttribute(fixedKey);
+           storageEl.save(storageName);
+         });
+       }
 
-         }, {
-           key: "load",
-           value: function load(keys) {
-             var values = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : [];
-             var presort = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
-             var size = keys.length;
-             var comparator = this._comparator; // sort if needed
-
-             if (presort) sort$1(keys, values, 0, size - 1, comparator);
-
-             if (this._root === null) {
-               // empty tree
-               this._root = loadRecursive$1(keys, values, 0, size);
-               this._size = size;
-             } else {
-               // that re-builds the whole tree from two in-order traversals
-               var mergedList = mergeLists(this.toList(), createList(keys, values), comparator);
-               size = this._size + size;
-               this._root = sortedListToBST({
-                 head: mergedList
-               }, 0, size);
-             }
+       function clearAll$3() {
+         _withStorageEl(function (storageEl) {
+           var attributes = storageEl.XMLDocument.documentElement.attributes;
+           storageEl.load(storageName);
 
-             return this;
-           }
-         }, {
-           key: "isEmpty",
-           value: function isEmpty() {
-             return this._root === null;
-           }
-         }, {
-           key: "toString",
-           value: function toString() {
-             var printNode = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : function (n) {
-               return String(n.key);
-             };
-             var out = [];
-             printRow(this._root, '', true, function (v) {
-               return out.push(v);
-             }, printNode);
-             return out.join('');
+           for (var i = attributes.length - 1; i >= 0; i--) {
+             storageEl.removeAttribute(attributes[i].name);
            }
-         }, {
-           key: "update",
-           value: function update(key, newKey, newData) {
-             var comparator = this._comparator;
 
-             var _split2 = _split(key, this._root, comparator),
-                 left = _split2.left,
-                 right = _split2.right;
+           storageEl.save(storageName);
+         });
+       } // Helpers
+       //////////
+       // In IE7, keys cannot start with a digit or contain certain chars.
+       // See https://github.com/marcuswestin/store.js/issues/40
+       // See https://github.com/marcuswestin/store.js/issues/83
 
-             if (comparator(key, newKey) < 0) {
-               right = _insert(newKey, newData, right, comparator);
-             } else {
-               left = _insert(newKey, newData, left, comparator);
-             }
 
-             this._root = merge$4(left, right, comparator);
-           }
-         }, {
-           key: "split",
-           value: function split(key) {
-             return _split(key, this._root, this._comparator);
-           }
-         }, {
-           key: "size",
-           get: function get() {
-             return this._size;
-           }
-         }, {
-           key: "root",
-           get: function get() {
-             return this._root;
-           }
-         }]);
+       var forbiddenCharsRegex = new RegExp("[!\"#$%&'()*+,/\\\\:;<=>?@[\\]^`{|}~]", "g");
 
-         return Tree;
-       }();
+       function fixKey(key) {
+         return key.replace(/^\d/, '___$&').replace(forbiddenCharsRegex, '___');
+       }
 
-       function loadRecursive$1(keys, values, start, end) {
-         var size = end - start;
+       function _makeIEStorageElFunction() {
+         if (!doc$1 || !doc$1.documentElement || !doc$1.documentElement.addBehavior) {
+           return null;
+         }
 
-         if (size > 0) {
-           var middle = start + Math.floor(size / 2);
-           var key = keys[middle];
-           var data = values[middle];
-           var node = new Node$1(key, data);
-           node.left = loadRecursive$1(keys, values, start, middle);
-           node.right = loadRecursive$1(keys, values, middle + 1, end);
-           return node;
+         var scriptTag = 'script',
+             storageOwner,
+             storageContainer,
+             storageEl; // Since #userData storage applies only to specific paths, we need to
+         // somehow link our data to a specific path.  We choose /favicon.ico
+         // as a pretty safe option, since all browsers already make a request to
+         // this URL anyway and being a 404 will not hurt us here.  We wrap an
+         // iframe pointing to the favicon in an ActiveXObject(htmlfile) object
+         // (see: http://msdn.microsoft.com/en-us/library/aa752574(v=VS.85).aspx)
+         // since the iframe access rules appear to allow direct access and
+         // manipulation of the document element, even for a 404 page.  This
+         // document can be used instead of the current document (which would
+         // have been limited to the current path) to perform #userData storage.
+
+         try {
+           /* global ActiveXObject */
+           storageContainer = new ActiveXObject('htmlfile');
+           storageContainer.open();
+           storageContainer.write('<' + scriptTag + '>document.w=window</' + scriptTag + '><iframe src="/favicon.ico"></iframe>');
+           storageContainer.close();
+           storageOwner = storageContainer.w.frames[0].document;
+           storageEl = storageOwner.createElement('div');
+         } catch (e) {
+           // somehow ActiveXObject instantiation failed (perhaps some special
+           // security settings or otherwse), fall back to per-path storage
+           storageEl = doc$1.createElement('div');
+           storageOwner = doc$1.body;
          }
 
-         return null;
+         return function (storeFunction) {
+           var args = [].slice.call(arguments, 0);
+           args.unshift(storageEl); // See http://msdn.microsoft.com/en-us/library/ms531081(v=VS.85).aspx
+           // and http://msdn.microsoft.com/en-us/library/ms531424(v=VS.85).aspx
+
+           storageOwner.appendChild(storageEl);
+           storageEl.addBehavior('#default#userData');
+           storageEl.load(storageName);
+           storeFunction.apply(this, args);
+           storageOwner.removeChild(storageEl);
+           return;
+         };
        }
 
-       function createList(keys, values) {
-         var head = new Node$1(null, null);
-         var p = head;
+       // doesn't work but cookies do. This implementation is adopted from
+       // https://developer.mozilla.org/en-US/docs/Web/API/Storage/LocalStorage
 
-         for (var i = 0; i < keys.length; i++) {
-           p = p.next = new Node$1(keys[i], values[i]);
+       var util$1 = util$6;
+       var Global$1 = util$1.Global;
+       var trim = util$1.trim;
+       var cookieStorage = {
+         name: 'cookieStorage',
+         read: read$2,
+         write: write$2,
+         each: each$2,
+         remove: remove$2,
+         clearAll: clearAll$2
+       };
+       var doc = Global$1.document;
+
+       function read$2(key) {
+         if (!key || !_has(key)) {
+           return null;
          }
 
-         p.next = null;
-         return head.next;
+         var regexpStr = "(?:^|.*;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=\\s*((?:[^;](?!;))*[^;]?).*";
+         return unescape(doc.cookie.replace(new RegExp(regexpStr), "$1"));
        }
 
-       function _toList(root) {
-         var current = root;
-         var Q = [];
-         var done = false;
-         var head = new Node$1(null, null);
-         var p = head;
+       function each$2(callback) {
+         var cookies = doc.cookie.split(/; ?/g);
 
-         while (!done) {
-           if (current) {
-             Q.push(current);
-             current = current.left;
-           } else {
-             if (Q.length > 0) {
-               current = p = p.next = Q.pop();
-               current = current.right;
-             } else done = true;
+         for (var i = cookies.length - 1; i >= 0; i--) {
+           if (!trim(cookies[i])) {
+             continue;
            }
+
+           var kvp = cookies[i].split('=');
+           var key = unescape(kvp[0]);
+           var val = unescape(kvp[1]);
+           callback(val, key);
          }
+       }
 
-         p.next = null; // that'll work even if the tree was empty
+       function write$2(key, data) {
+         if (!key) {
+           return;
+         }
 
-         return head.next;
+         doc.cookie = escape(key) + "=" + escape(data) + "; expires=Tue, 19 Jan 2038 03:14:07 GMT; path=/";
        }
 
-       function sortedListToBST(list, start, end) {
-         var size = end - start;
-
-         if (size > 0) {
-           var middle = start + Math.floor(size / 2);
-           var left = sortedListToBST(list, start, middle);
-           var root = list.head;
-           root.left = left;
-           list.head = list.head.next;
-           root.right = sortedListToBST(list, middle + 1, end);
-           return root;
+       function remove$2(key) {
+         if (!key || !_has(key)) {
+           return;
          }
 
-         return null;
+         doc.cookie = escape(key) + "=; expires=Thu, 01 Jan 1970 00:00:00 GMT; path=/";
        }
 
-       function mergeLists(l1, l2, compare) {
-         var head = new Node$1(null, null); // dummy
+       function clearAll$2() {
+         each$2(function (_, key) {
+           remove$2(key);
+         });
+       }
 
-         var p = head;
-         var p1 = l1;
-         var p2 = l2;
+       function _has(key) {
+         return new RegExp("(?:^|;\\s*)" + escape(key).replace(/[\-\.\+\*]/g, "\\$&") + "\\s*\\=").test(doc.cookie);
+       }
 
-         while (p1 !== null && p2 !== null) {
-           if (compare(p1.key, p2.key) < 0) {
-             p.next = p1;
-             p1 = p1.next;
-           } else {
-             p.next = p2;
-             p2 = p2.next;
-           }
+       var util = util$6;
+       var Global = util.Global;
+       var sessionStorage_1 = {
+         name: 'sessionStorage',
+         read: read$1,
+         write: write$1,
+         each: each$1,
+         remove: remove$1,
+         clearAll: clearAll$1
+       };
 
-           p = p.next;
-         }
+       function sessionStorage() {
+         return Global.sessionStorage;
+       }
 
-         if (p1 !== null) {
-           p.next = p1;
-         } else if (p2 !== null) {
-           p.next = p2;
+       function read$1(key) {
+         return sessionStorage().getItem(key);
+       }
+
+       function write$1(key, data) {
+         return sessionStorage().setItem(key, data);
+       }
+
+       function each$1(fn) {
+         for (var i = sessionStorage().length - 1; i >= 0; i--) {
+           var key = sessionStorage().key(i);
+           fn(read$1(key), key);
          }
+       }
 
-         return head.next;
+       function remove$1(key) {
+         return sessionStorage().removeItem(key);
        }
 
-       function sort$1(keys, values, left, right, compare) {
-         if (left >= right) return;
-         var pivot = keys[left + right >> 1];
-         var i = left - 1;
-         var j = right + 1;
+       function clearAll$1() {
+         return sessionStorage().clear();
+       }
 
-         while (true) {
-           do {
-             i++;
-           } while (compare(keys[i], pivot) < 0);
+       // is functions (meaning store.get(), store.set(), etc will all function).
+       // However, stored values will not persist when the browser navigates to
+       // a new page or reloads the current page.
 
-           do {
-             j--;
-           } while (compare(keys[j], pivot) > 0);
+       var memoryStorage_1 = {
+         name: 'memoryStorage',
+         read: read,
+         write: write,
+         each: each,
+         remove: remove,
+         clearAll: clearAll
+       };
+       var memoryStorage = {};
 
-           if (i >= j) break;
-           var tmp = keys[i];
-           keys[i] = keys[j];
-           keys[j] = tmp;
-           tmp = values[i];
-           values[i] = values[j];
-           values[j] = tmp;
-         }
+       function read(key) {
+         return memoryStorage[key];
+       }
 
-         sort$1(keys, values, left, j, compare);
-         sort$1(keys, values, j + 1, right, compare);
+       function write(key, data) {
+         memoryStorage[key] = data;
        }
 
-       function _classCallCheck$1(instance, Constructor) {
-         if (!(instance instanceof Constructor)) {
-           throw new TypeError("Cannot call a class as a function");
+       function each(callback) {
+         for (var key in memoryStorage) {
+           if (memoryStorage.hasOwnProperty(key)) {
+             callback(memoryStorage[key], key);
+           }
          }
        }
 
-       function _defineProperties$1(target, props) {
-         for (var i = 0; i < props.length; i++) {
-           var descriptor = props[i];
-           descriptor.enumerable = descriptor.enumerable || false;
-           descriptor.configurable = true;
-           if ("value" in descriptor) descriptor.writable = true;
-           Object.defineProperty(target, descriptor.key, descriptor);
-         }
+       function remove(key) {
+         delete memoryStorage[key];
        }
 
-       function _createClass$1(Constructor, protoProps, staticProps) {
-         if (protoProps) _defineProperties$1(Constructor.prototype, protoProps);
-         if (staticProps) _defineProperties$1(Constructor, staticProps);
-         return Constructor;
+       function clearAll(key) {
+         memoryStorage = {};
        }
-       /**
-        * A bounding box has the format:
-        *
-        *  { ll: { x: xmin, y: ymin }, ur: { x: xmax, y: ymax } }
-        *
-        */
 
+       var all = [// Listed in order of usage preference
+       localStorage_1, oldFFGlobalStorage, oldIEUserDataStorage, cookieStorage, sessionStorage_1, memoryStorage_1];
+
+       /* eslint-disable */
+       //  json2.js
+       //  2016-10-28
+       //  Public Domain.
+       //  NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
+       //  See http://www.JSON.org/js.html
+       //  This code should be minified before deployment.
+       //  See http://javascript.crockford.com/jsmin.html
+       //  USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
+       //  NOT CONTROL.
+       //  This file creates a global JSON object containing two methods: stringify
+       //  and parse. This file provides the ES5 JSON capability to ES3 systems.
+       //  If a project might run on IE8 or earlier, then this file should be included.
+       //  This file does nothing on ES5 systems.
+       //      JSON.stringify(value, replacer, space)
+       //          value       any JavaScript value, usually an object or array.
+       //          replacer    an optional parameter that determines how object
+       //                      values are stringified for objects. It can be a
+       //                      function or an array of strings.
+       //          space       an optional parameter that specifies the indentation
+       //                      of nested structures. If it is omitted, the text will
+       //                      be packed without extra whitespace. If it is a number,
+       //                      it will specify the number of spaces to indent at each
+       //                      level. If it is a string (such as "\t" or "&nbsp;"),
+       //                      it contains the characters used to indent at each level.
+       //          This method produces a JSON text from a JavaScript value.
+       //          When an object value is found, if the object contains a toJSON
+       //          method, its toJSON method will be called and the result will be
+       //          stringified. A toJSON method does not serialize: it returns the
+       //          value represented by the name/value pair that should be serialized,
+       //          or undefined if nothing should be serialized. The toJSON method
+       //          will be passed the key associated with the value, and this will be
+       //          bound to the value.
+       //          For example, this would serialize Dates as ISO strings.
+       //              Date.prototype.toJSON = function (key) {
+       //                  function f(n) {
+       //                      // Format integers to have at least two digits.
+       //                      return (n < 10)
+       //                          ? "0" + n
+       //                          : n;
+       //                  }
+       //                  return this.getUTCFullYear()   + "-" +
+       //                       f(this.getUTCMonth() + 1) + "-" +
+       //                       f(this.getUTCDate())      + "T" +
+       //                       f(this.getUTCHours())     + ":" +
+       //                       f(this.getUTCMinutes())   + ":" +
+       //                       f(this.getUTCSeconds())   + "Z";
+       //              };
+       //          You can provide an optional replacer method. It will be passed the
+       //          key and value of each member, with this bound to the containing
+       //          object. The value that is returned from your method will be
+       //          serialized. If your method returns undefined, then the member will
+       //          be excluded from the serialization.
+       //          If the replacer parameter is an array of strings, then it will be
+       //          used to select the members to be serialized. It filters the results
+       //          such that only members with keys listed in the replacer array are
+       //          stringified.
+       //          Values that do not have JSON representations, such as undefined or
+       //          functions, will not be serialized. Such values in objects will be
+       //          dropped; in arrays they will be replaced with null. You can use
+       //          a replacer function to replace those with JSON values.
+       //          JSON.stringify(undefined) returns undefined.
+       //          The optional space parameter produces a stringification of the
+       //          value that is filled with line breaks and indentation to make it
+       //          easier to read.
+       //          If the space parameter is a non-empty string, then that string will
+       //          be used for indentation. If the space parameter is a number, then
+       //          the indentation will be that many spaces.
+       //          Example:
+       //          text = JSON.stringify(["e", {pluribus: "unum"}]);
+       //          // text is '["e",{"pluribus":"unum"}]'
+       //          text = JSON.stringify(["e", {pluribus: "unum"}], null, "\t");
+       //          // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
+       //          text = JSON.stringify([new Date()], function (key, value) {
+       //              return this[key] instanceof Date
+       //                  ? "Date(" + this[key] + ")"
+       //                  : value;
+       //          });
+       //          // text is '["Date(---current time---)"]'
+       //      JSON.parse(text, reviver)
+       //          This method parses a JSON text to produce an object or array.
+       //          It can throw a SyntaxError exception.
+       //          The optional reviver parameter is a function that can filter and
+       //          transform the results. It receives each of the keys and values,
+       //          and its return value is used instead of the original value.
+       //          If it returns what it received, then the structure is not modified.
+       //          If it returns undefined then the member is deleted.
+       //          Example:
+       //          // Parse the text. Values that look like ISO date strings will
+       //          // be converted to Date objects.
+       //          myData = JSON.parse(text, function (key, value) {
+       //              var a;
+       //              if (typeof value === "string") {
+       //                  a =
+       //   /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
+       //                  if (a) {
+       //                      return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
+       //                          +a[5], +a[6]));
+       //                  }
+       //              }
+       //              return value;
+       //          });
+       //          myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
+       //              var d;
+       //              if (typeof value === "string" &&
+       //                      value.slice(0, 5) === "Date(" &&
+       //                      value.slice(-1) === ")") {
+       //                  d = new Date(value.slice(5, -1));
+       //                  if (d) {
+       //                      return d;
+       //                  }
+       //              }
+       //              return value;
+       //          });
+       //  This is a reference implementation. You are free to copy, modify, or
+       //  redistribute.
+
+       /*jslint
+           eval, for, this
+       */
 
-       var isInBbox = function isInBbox(bbox, point) {
-         return bbox.ll.x <= point.x && point.x <= bbox.ur.x && bbox.ll.y <= point.y && point.y <= bbox.ur.y;
-       };
-       /* Returns either null, or a bbox (aka an ordered pair of points)
-        * If there is only one point of overlap, a bbox with identical points
-        * will be returned */
+       /*property
+           JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
+           getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
+           lastIndex, length, parse, prototype, push, replace, slice, stringify,
+           test, toJSON, toString, valueOf
+       */
+       // Create a JSON object only if one does not already exist. We create the
+       // methods in a closure to avoid creating global variables.
+       if ((typeof JSON === "undefined" ? "undefined" : _typeof(JSON)) !== "object") {
+         JSON = {};
+       }
 
+       (function () {
 
-       var getBboxOverlap = function getBboxOverlap(b1, b2) {
-         // check if the bboxes overlap at all
-         if (b2.ur.x < b1.ll.x || b1.ur.x < b2.ll.x || b2.ur.y < b1.ll.y || b1.ur.y < b2.ll.y) return null; // find the middle two X values
+         var rx_one = /^[\],:{}\s]*$/;
+         var rx_two = /\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g;
+         var rx_three = /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g;
+         var rx_four = /(?:^|:|,)(?:\s*\[)+/g;
+         var rx_escapable = /[\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
+         var rx_dangerous = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
 
-         var lowerX = b1.ll.x < b2.ll.x ? b2.ll.x : b1.ll.x;
-         var upperX = b1.ur.x < b2.ur.x ? b1.ur.x : b2.ur.x; // find the middle two Y values
+         function f(n) {
+           // Format integers to have at least two digits.
+           return n < 10 ? "0" + n : n;
+         }
 
-         var lowerY = b1.ll.y < b2.ll.y ? b2.ll.y : b1.ll.y;
-         var upperY = b1.ur.y < b2.ur.y ? b1.ur.y : b2.ur.y; // put those middle values together to get the overlap
+         function this_value() {
+           return this.valueOf();
+         }
 
-         return {
-           ll: {
-             x: lowerX,
-             y: lowerY
-           },
-           ur: {
-             x: upperX,
-             y: upperY
-           }
-         };
-       };
-       /* Javascript doesn't do integer math. Everything is
-        * floating point with percision Number.EPSILON.
-        *
-        * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Number/EPSILON
-        */
+         if (typeof Date.prototype.toJSON !== "function") {
+           Date.prototype.toJSON = function () {
+             return isFinite(this.valueOf()) ? this.getUTCFullYear() + "-" + f(this.getUTCMonth() + 1) + "-" + f(this.getUTCDate()) + "T" + f(this.getUTCHours()) + ":" + f(this.getUTCMinutes()) + ":" + f(this.getUTCSeconds()) + "Z" : null;
+           };
 
+           Boolean.prototype.toJSON = this_value;
+           Number.prototype.toJSON = this_value;
+           String.prototype.toJSON = this_value;
+         }
 
-       var epsilon$2 = Number.EPSILON; // IE Polyfill
+         var gap;
+         var indent;
+         var meta;
+         var rep;
 
-       if (epsilon$2 === undefined) epsilon$2 = Math.pow(2, -52);
-       var EPSILON_SQ = epsilon$2 * epsilon$2;
-       /* FLP comparator */
+         function quote(string) {
+           // If the string contains no control characters, no quote characters, and no
+           // backslash characters, then we can safely slap some quotes around it.
+           // Otherwise we must also replace the offending characters with safe escape
+           // sequences.
+           rx_escapable.lastIndex = 0;
+           return rx_escapable.test(string) ? "\"" + string.replace(rx_escapable, function (a) {
+             var c = meta[a];
+             return typeof c === "string" ? c : "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+           }) + "\"" : "\"" + string + "\"";
+         }
 
-       var cmp = function cmp(a, b) {
-         // check if they're both 0
-         if (-epsilon$2 < a && a < epsilon$2) {
-           if (-epsilon$2 < b && b < epsilon$2) {
-             return 0;
-           }
-         } // check if they're flp equal
+         function str(key, holder) {
+           // Produce a string from holder[key].
+           var i; // The loop counter.
 
+           var k; // The member key.
 
-         var ab = a - b;
+           var v; // The member value.
 
-         if (ab * ab < EPSILON_SQ * a * b) {
-           return 0;
-         } // normal comparison
+           var length;
+           var mind = gap;
+           var partial;
+           var value = holder[key]; // If the value has a toJSON method, call it to obtain a replacement value.
 
+           if (value && _typeof(value) === "object" && typeof value.toJSON === "function") {
+             value = value.toJSON(key);
+           } // If we were called with a replacer function, then call the replacer to
+           // obtain a replacement value.
 
-         return a < b ? -1 : 1;
-       };
-       /**
-        * This class rounds incoming values sufficiently so that
-        * floating points problems are, for the most part, avoided.
-        *
-        * Incoming points are have their x & y values tested against
-        * all previously seen x & y values. If either is 'too close'
-        * to a previously seen value, it's value is 'snapped' to the
-        * previously seen value.
-        *
-        * All points should be rounded by this class before being
-        * stored in any data structures in the rest of this algorithm.
-        */
 
+           if (typeof rep === "function") {
+             value = rep.call(holder, key, value);
+           } // What happens next depends on the value's type.
 
-       var PtRounder = /*#__PURE__*/function () {
-         function PtRounder() {
-           _classCallCheck$1(this, PtRounder);
 
-           this.reset();
-         }
+           switch (_typeof(value)) {
+             case "string":
+               return quote(value);
 
-         _createClass$1(PtRounder, [{
-           key: "reset",
-           value: function reset() {
-             this.xRounder = new CoordRounder();
-             this.yRounder = new CoordRounder();
-           }
-         }, {
-           key: "round",
-           value: function round(x, y) {
-             return {
-               x: this.xRounder.round(x),
-               y: this.yRounder.round(y)
-             };
-           }
-         }]);
+             case "number":
+               // JSON numbers must be finite. Encode non-finite numbers as null.
+               return isFinite(value) ? String(value) : "null";
 
-         return PtRounder;
-       }();
+             case "boolean":
+             case "null":
+               // If the value is a boolean or null, convert it to a string. Note:
+               // typeof null does not produce "null". The case is included here in
+               // the remote chance that this gets fixed someday.
+               return String(value);
+             // If the type is "object", we might be dealing with an object or an array or
+             // null.
 
-       var CoordRounder = /*#__PURE__*/function () {
-         function CoordRounder() {
-           _classCallCheck$1(this, CoordRounder);
+             case "object":
+               // Due to a specification blunder in ECMAScript, typeof null is "object",
+               // so watch out for that case.
+               if (!value) {
+                 return "null";
+               } // Make an array to hold the partial results of stringifying this object value.
 
-           this.tree = new Tree(); // preseed with 0 so we don't end up with values < Number.EPSILON
 
-           this.round(0);
-         } // Note: this can rounds input values backwards or forwards.
-         //       You might ask, why not restrict this to just rounding
-         //       forwards? Wouldn't that allow left endpoints to always
-         //       remain left endpoints during splitting (never change to
-         //       right). No - it wouldn't, because we snap intersections
-         //       to endpoints (to establish independence from the segment
-         //       angle for t-intersections).
+               gap += indent;
+               partial = []; // Is the value an array?
 
+               if (Object.prototype.toString.apply(value) === "[object Array]") {
+                 // The value is an array. Stringify every element. Use null as a placeholder
+                 // for non-JSON values.
+                 length = value.length;
 
-         _createClass$1(CoordRounder, [{
-           key: "round",
-           value: function round(coord) {
-             var node = this.tree.add(coord);
-             var prevNode = this.tree.prev(node);
+                 for (i = 0; i < length; i += 1) {
+                   partial[i] = str(i, value) || "null";
+                 } // Join all of the elements together, separated with commas, and wrap them in
+                 // brackets.
 
-             if (prevNode !== null && cmp(node.key, prevNode.key) === 0) {
-               this.tree.remove(coord);
-               return prevNode.key;
-             }
 
-             var nextNode = this.tree.next(node);
+                 v = partial.length === 0 ? "[]" : gap ? "[\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "]" : "[" + partial.join(",") + "]";
+                 gap = mind;
+                 return v;
+               } // If the replacer is an array, use it to select the members to be stringified.
 
-             if (nextNode !== null && cmp(node.key, nextNode.key) === 0) {
-               this.tree.remove(coord);
-               return nextNode.key;
-             }
 
-             return coord;
-           }
-         }]);
+               if (rep && _typeof(rep) === "object") {
+                 length = rep.length;
 
-         return CoordRounder;
-       }(); // singleton available by import
+                 for (i = 0; i < length; i += 1) {
+                   if (typeof rep[i] === "string") {
+                     k = rep[i];
+                     v = str(k, value);
 
+                     if (v) {
+                       partial.push(quote(k) + (gap ? ": " : ":") + v);
+                     }
+                   }
+                 }
+               } else {
+                 // Otherwise, iterate through all of the keys in the object.
+                 for (k in value) {
+                   if (Object.prototype.hasOwnProperty.call(value, k)) {
+                     v = str(k, value);
 
-       var rounder = new PtRounder();
-       /* Cross Product of two vectors with first point at origin */
+                     if (v) {
+                       partial.push(quote(k) + (gap ? ": " : ":") + v);
+                     }
+                   }
+                 }
+               } // Join all of the member texts together, separated with commas,
+               // and wrap them in braces.
 
-       var crossProduct$1 = function crossProduct(a, b) {
-         return a.x * b.y - a.y * b.x;
-       };
-       /* Dot Product of two vectors with first point at origin */
 
+               v = partial.length === 0 ? "{}" : gap ? "{\n" + gap + partial.join(",\n" + gap) + "\n" + mind + "}" : "{" + partial.join(",") + "}";
+               gap = mind;
+               return v;
+           }
+         } // If the JSON object does not yet have a stringify method, give it one.
 
-       var dotProduct$1 = function dotProduct(a, b) {
-         return a.x * b.x + a.y * b.y;
-       };
-       /* Comparator for two vectors with same starting point */
 
+         if (typeof JSON.stringify !== "function") {
+           meta = {
+             // table of character substitutions
+             "\b": "\\b",
+             "\t": "\\t",
+             "\n": "\\n",
+             "\f": "\\f",
+             "\r": "\\r",
+             "\"": "\\\"",
+             "\\": "\\\\"
+           };
 
-       var compareVectorAngles = function compareVectorAngles(basePt, endPt1, endPt2) {
-         var v1 = {
-           x: endPt1.x - basePt.x,
-           y: endPt1.y - basePt.y
-         };
-         var v2 = {
-           x: endPt2.x - basePt.x,
-           y: endPt2.y - basePt.y
-         };
-         var kross = crossProduct$1(v1, v2);
-         return cmp(kross, 0);
-       };
+           JSON.stringify = function (value, replacer, space) {
+             // The stringify method takes a value and an optional replacer, and an optional
+             // space parameter, and returns a JSON text. The replacer can be a function
+             // that can replace values, or an array of strings that will select the keys.
+             // A default replacer method can be provided. Use of the space parameter can
+             // produce text that is more easily readable.
+             var i;
+             gap = "";
+             indent = ""; // If the space parameter is a number, make an indent string containing that
+             // many spaces.
 
-       var length = function length(v) {
-         return Math.sqrt(dotProduct$1(v, v));
-       };
-       /* Get the sine of the angle from pShared -> pAngle to pShaed -> pBase */
+             if (typeof space === "number") {
+               for (i = 0; i < space; i += 1) {
+                 indent += " ";
+               } // If the space parameter is a string, it will be used as the indent string.
 
+             } else if (typeof space === "string") {
+               indent = space;
+             } // If there is a replacer, it must be a function or an array.
+             // Otherwise, throw an error.
 
-       var sineOfAngle = function sineOfAngle(pShared, pBase, pAngle) {
-         var vBase = {
-           x: pBase.x - pShared.x,
-           y: pBase.y - pShared.y
-         };
-         var vAngle = {
-           x: pAngle.x - pShared.x,
-           y: pAngle.y - pShared.y
-         };
-         return crossProduct$1(vAngle, vBase) / length(vAngle) / length(vBase);
-       };
-       /* Get the cosine of the angle from pShared -> pAngle to pShaed -> pBase */
 
+             rep = replacer;
 
-       var cosineOfAngle = function cosineOfAngle(pShared, pBase, pAngle) {
-         var vBase = {
-           x: pBase.x - pShared.x,
-           y: pBase.y - pShared.y
-         };
-         var vAngle = {
-           x: pAngle.x - pShared.x,
-           y: pAngle.y - pShared.y
-         };
-         return dotProduct$1(vAngle, vBase) / length(vAngle) / length(vBase);
-       };
-       /* Get the x coordinate where the given line (defined by a point and vector)
-        * crosses the horizontal line with the given y coordiante.
-        * In the case of parrallel lines (including overlapping ones) returns null. */
+             if (replacer && typeof replacer !== "function" && (_typeof(replacer) !== "object" || typeof replacer.length !== "number")) {
+               throw new Error("JSON.stringify");
+             } // Make a fake root object containing our value under the key of "".
+             // Return the result of stringifying the value.
 
 
-       var horizontalIntersection = function horizontalIntersection(pt, v, y) {
-         if (v.y === 0) return null;
-         return {
-           x: pt.x + v.x / v.y * (y - pt.y),
-           y: y
-         };
-       };
-       /* Get the y coordinate where the given line (defined by a point and vector)
-        * crosses the vertical line with the given x coordiante.
-        * In the case of parrallel lines (including overlapping ones) returns null. */
+             return str("", {
+               "": value
+             });
+           };
+         } // If the JSON object does not yet have a parse method, give it one.
 
 
-       var verticalIntersection = function verticalIntersection(pt, v, x) {
-         if (v.x === 0) return null;
-         return {
-           x: x,
-           y: pt.y + v.y / v.x * (x - pt.x)
-         };
-       };
-       /* Get the intersection of two lines, each defined by a base point and a vector.
-        * In the case of parrallel lines (including overlapping ones) returns null. */
+         if (typeof JSON.parse !== "function") {
+           JSON.parse = function (text, reviver) {
+             // The parse method takes a text and an optional reviver function, and returns
+             // a JavaScript value if the text is a valid JSON text.
+             var j;
 
+             function walk(holder, key) {
+               // The walk method is used to recursively walk the resulting structure so
+               // that modifications can be made.
+               var k;
+               var v;
+               var value = holder[key];
 
-       var intersection$1 = function intersection(pt1, v1, pt2, v2) {
-         // take some shortcuts for vertical and horizontal lines
-         // this also ensures we don't calculate an intersection and then discover
-         // it's actually outside the bounding box of the line
-         if (v1.x === 0) return verticalIntersection(pt2, v2, pt1.x);
-         if (v2.x === 0) return verticalIntersection(pt1, v1, pt2.x);
-         if (v1.y === 0) return horizontalIntersection(pt2, v2, pt1.y);
-         if (v2.y === 0) return horizontalIntersection(pt1, v1, pt2.y); // General case for non-overlapping segments.
-         // This algorithm is based on Schneider and Eberly.
-         // http://www.cimec.org.ar/~ncalvo/Schneider_Eberly.pdf - pg 244
+               if (value && _typeof(value) === "object") {
+                 for (k in value) {
+                   if (Object.prototype.hasOwnProperty.call(value, k)) {
+                     v = walk(value, k);
 
-         var kross = crossProduct$1(v1, v2);
-         if (kross == 0) return null;
-         var ve = {
-           x: pt2.x - pt1.x,
-           y: pt2.y - pt1.y
-         };
-         var d1 = crossProduct$1(ve, v1) / kross;
-         var d2 = crossProduct$1(ve, v2) / kross; // take the average of the two calculations to minimize rounding error
+                     if (v !== undefined) {
+                       value[k] = v;
+                     } else {
+                       delete value[k];
+                     }
+                   }
+                 }
+               }
 
-         var x1 = pt1.x + d2 * v1.x,
-             x2 = pt2.x + d1 * v2.x;
-         var y1 = pt1.y + d2 * v1.y,
-             y2 = pt2.y + d1 * v2.y;
-         var x = (x1 + x2) / 2;
-         var y = (y1 + y2) / 2;
-         return {
-           x: x,
-           y: y
-         };
-       };
+               return reviver.call(holder, key, value);
+             } // Parsing happens in four stages. In the first stage, we replace certain
+             // Unicode characters with escape sequences. JavaScript handles many characters
+             // incorrectly, either silently deleting them, or treating them as line endings.
 
-       var SweepEvent$1 = /*#__PURE__*/function () {
-         _createClass$1(SweepEvent, null, [{
-           key: "compare",
-           // for ordering sweep events in the sweep event queue
-           value: function compare(a, b) {
-             // favor event with a point that the sweep line hits first
-             var ptCmp = SweepEvent.comparePoints(a.point, b.point);
-             if (ptCmp !== 0) return ptCmp; // the points are the same, so link them if needed
 
-             if (a.point !== b.point) a.link(b); // favor right events over left
+             text = String(text);
+             rx_dangerous.lastIndex = 0;
 
-             if (a.isLeft !== b.isLeft) return a.isLeft ? 1 : -1; // we have two matching left or right endpoints
-             // ordering of this case is the same as for their segments
+             if (rx_dangerous.test(text)) {
+               text = text.replace(rx_dangerous, function (a) {
+                 return "\\u" + ("0000" + a.charCodeAt(0).toString(16)).slice(-4);
+               });
+             } // In the second stage, we run the text against regular expressions that look
+             // for non-JSON patterns. We are especially concerned with "()" and "new"
+             // because they can cause invocation, and "=" because it can cause mutation.
+             // But just to be safe, we want to reject all unexpected forms.
+             // We split the second stage into 4 regexp operations in order to work around
+             // crippling inefficiencies in IE's and Safari's regexp engines. First we
+             // replace the JSON backslash pairs with "@" (a non-JSON character). Second, we
+             // replace all simple value tokens with "]" characters. Third, we delete all
+             // open brackets that follow a colon or comma or that begin the text. Finally,
+             // we look to see that the remaining characters are only whitespace or "]" or
+             // "," or ":" or "{" or "}". If that is so, then the text is safe for eval.
 
-             return Segment.compare(a.segment, b.segment);
-           } // for ordering points in sweep line order
 
-         }, {
-           key: "comparePoints",
-           value: function comparePoints(aPt, bPt) {
-             if (aPt.x < bPt.x) return -1;
-             if (aPt.x > bPt.x) return 1;
-             if (aPt.y < bPt.y) return -1;
-             if (aPt.y > bPt.y) return 1;
-             return 0;
-           } // Warning: 'point' input will be modified and re-used (for performance)
+             if (rx_one.test(text.replace(rx_two, "@").replace(rx_three, "]").replace(rx_four, ""))) {
+               // In the third stage we use the eval function to compile the text into a
+               // JavaScript structure. The "{" operator is subject to a syntactic ambiguity
+               // in JavaScript: it can begin a block or an object literal. We wrap the text
+               // in parens to eliminate the ambiguity.
+               j = eval("(" + text + ")"); // In the optional fourth stage, we recursively walk the new structure, passing
+               // each name/value pair to a reviver function for possible transformation.
 
-         }]);
+               return typeof reviver === "function" ? walk({
+                 "": j
+               }, "") : j;
+             } // If the text is not JSON parseable, then a SyntaxError is thrown.
 
-         function SweepEvent(point, isLeft) {
-           _classCallCheck$1(this, SweepEvent);
 
-           if (point.events === undefined) point.events = [this];else point.events.push(this);
-           this.point = point;
-           this.isLeft = isLeft; // this.segment, this.otherSE set by factory
+             throw new SyntaxError("JSON.parse");
+           };
          }
+       })();
 
-         _createClass$1(SweepEvent, [{
-           key: "link",
-           value: function link(other) {
-             if (other.point === this.point) {
-               throw new Error('Tried to link already linked events');
-             }
-
-             var otherEvents = other.point.events;
-
-             for (var i = 0, iMax = otherEvents.length; i < iMax; i++) {
-               var evt = otherEvents[i];
-               this.point.events.push(evt);
-               evt.point = this.point;
-             }
-
-             this.checkForConsuming();
-           }
-           /* Do a pass over our linked events and check to see if any pair
-            * of segments match, and should be consumed. */
-
-         }, {
-           key: "checkForConsuming",
-           value: function checkForConsuming() {
-             // FIXME: The loops in this method run O(n^2) => no good.
-             //        Maintain little ordered sweep event trees?
-             //        Can we maintaining an ordering that avoids the need
-             //        for the re-sorting with getLeftmostComparator in geom-out?
-             // Compare each pair of events to see if other events also match
-             var numEvents = this.point.events.length;
-
-             for (var i = 0; i < numEvents; i++) {
-               var evt1 = this.point.events[i];
-               if (evt1.segment.consumedBy !== undefined) continue;
-
-               for (var j = i + 1; j < numEvents; j++) {
-                 var evt2 = this.point.events[j];
-                 if (evt2.consumedBy !== undefined) continue;
-                 if (evt1.otherSE.point.events !== evt2.otherSE.point.events) continue;
-                 evt1.segment.consume(evt2.segment);
-               }
-             }
-           }
-         }, {
-           key: "getAvailableLinkedEvents",
-           value: function getAvailableLinkedEvents() {
-             // point.events is always of length 2 or greater
-             var events = [];
+       var json2 = json2Plugin;
 
-             for (var i = 0, iMax = this.point.events.length; i < iMax; i++) {
-               var evt = this.point.events[i];
+       function json2Plugin() {
+         return {};
+       }
 
-               if (evt !== this && !evt.segment.ringOut && evt.segment.isInResult()) {
-                 events.push(evt);
-               }
-             }
+       var engine = storeEngine;
+       var storages = all;
+       var plugins = [json2];
+       var store_legacy = engine.createStore(storages, plugins);
 
-             return events;
-           }
-           /**
-            * Returns a comparator function for sorting linked events that will
-            * favor the event that will give us the smallest left-side angle.
-            * All ring construction starts as low as possible heading to the right,
-            * so by always turning left as sharp as possible we'll get polygons
-            * without uncessary loops & holes.
-            *
-            * The comparator function has a compute cache such that it avoids
-            * re-computing already-computed values.
-            */
+       var immutable = extend;
+       var hasOwnProperty = Object.prototype.hasOwnProperty;
 
-         }, {
-           key: "getLeftmostComparator",
-           value: function getLeftmostComparator(baseEvent) {
-             var _this = this;
+       function extend() {
+         var target = {};
 
-             var cache = new Map();
+         for (var i = 0; i < arguments.length; i++) {
+           var source = arguments[i];
 
-             var fillCache = function fillCache(linkedEvent) {
-               var nextEvent = linkedEvent.otherSE;
-               cache.set(linkedEvent, {
-                 sine: sineOfAngle(_this.point, baseEvent.point, nextEvent.point),
-                 cosine: cosineOfAngle(_this.point, baseEvent.point, nextEvent.point)
-               });
-             };
+           for (var key in source) {
+             if (hasOwnProperty.call(source, key)) {
+               target[key] = source[key];
+             }
+           }
+         }
 
-             return function (a, b) {
-               if (!cache.has(a)) fillCache(a);
-               if (!cache.has(b)) fillCache(b);
+         return target;
+       }
 
-               var _cache$get = cache.get(a),
-                   asine = _cache$get.sine,
-                   acosine = _cache$get.cosine;
+       var ohauth = ohauth_1;
+       var resolveUrl = resolveUrl$1.exports;
+       var store = store_legacy;
+       var xtend = immutable; // # osm-auth
+       //
+       // This code is only compatible with IE10+ because the [XDomainRequest](http://bit.ly/LfO7xo)
+       // object, IE<10's idea of [CORS](http://en.wikipedia.org/wiki/Cross-origin_resource_sharing),
+       // does not support custom headers, which this uses everywhere.
 
-               var _cache$get2 = cache.get(b),
-                   bsine = _cache$get2.sine,
-                   bcosine = _cache$get2.cosine; // both on or above x-axis
+       var osmAuth = function osmAuth(o) {
+         var oauth = {}; // authenticated users will also have a request token secret, but it's
+         // not used in transactions with the server
 
+         oauth.authenticated = function () {
+           return !!(token('oauth_token') && token('oauth_token_secret'));
+         };
 
-               if (asine >= 0 && bsine >= 0) {
-                 if (acosine < bcosine) return 1;
-                 if (acosine > bcosine) return -1;
-                 return 0;
-               } // both below x-axis
+         oauth.logout = function () {
+           token('oauth_token', '');
+           token('oauth_token_secret', '');
+           token('oauth_request_token_secret', '');
+           return oauth;
+         }; // TODO: detect lack of click event
 
 
-               if (asine < 0 && bsine < 0) {
-                 if (acosine < bcosine) return -1;
-                 if (acosine > bcosine) return 1;
-                 return 0;
-               } // one above x-axis, one below
+         oauth.authenticate = function (callback) {
+           if (oauth.authenticated()) return callback();
+           oauth.logout(); // ## Getting a request token
 
+           var params = timenonce(getAuth(o)),
+               url = o.url + '/oauth/request_token';
+           params.oauth_signature = ohauth.signature(o.oauth_secret, '', ohauth.baseString('POST', url, params));
 
-               if (bsine < asine) return -1;
-               if (bsine > asine) return 1;
-               return 0;
-             };
-           }
-         }]);
+           if (!o.singlepage) {
+             // Create a 600x550 popup window in the center of the screen
+             var w = 600,
+                 h = 550,
+                 settings = [['width', w], ['height', h], ['left', screen.width / 2 - w / 2], ['top', screen.height / 2 - h / 2]].map(function (x) {
+               return x.join('=');
+             }).join(','),
+                 popup = window.open('about:blank', 'oauth_window', settings);
+             oauth.popupWindow = popup;
 
-         return SweepEvent;
-       }(); // segments and sweep events when all else is identical
+             if (!popup) {
+               var error = new Error('Popup was blocked');
+               error.status = 'popup-blocked';
+               throw error;
+             }
+           } // Request a request token. When this is complete, the popup
+           // window is redirected to OSM's authorization page.
 
 
-       var segmentId = 0;
+           ohauth.xhr('POST', url, params, null, {}, reqTokenDone);
+           o.loading();
 
-       var Segment = /*#__PURE__*/function () {
-         _createClass$1(Segment, null, [{
-           key: "compare",
+           function reqTokenDone(err, xhr) {
+             o.done();
+             if (err) return callback(err);
+             var resp = ohauth.stringQs(xhr.response);
+             token('oauth_request_token_secret', resp.oauth_token_secret);
+             var authorize_url = o.url + '/oauth/authorize?' + ohauth.qsString({
+               oauth_token: resp.oauth_token,
+               oauth_callback: resolveUrl(o.landing)
+             });
 
-           /* This compare() function is for ordering segments in the sweep
-            * line tree, and does so according to the following criteria:
-            *
-            * Consider the vertical line that lies an infinestimal step to the
-            * right of the right-more of the two left endpoints of the input
-            * segments. Imagine slowly moving a point up from negative infinity
-            * in the increasing y direction. Which of the two segments will that
-            * point intersect first? That segment comes 'before' the other one.
-            *
-            * If neither segment would be intersected by such a line, (if one
-            * or more of the segments are vertical) then the line to be considered
-            * is directly on the right-more of the two left inputs.
-            */
-           value: function compare(a, b) {
-             var alx = a.leftSE.point.x;
-             var blx = b.leftSE.point.x;
-             var arx = a.rightSE.point.x;
-             var brx = b.rightSE.point.x; // check if they're even in the same vertical plane
+             if (o.singlepage) {
+               location.href = authorize_url;
+             } else {
+               popup.location = authorize_url;
+             }
+           } // Called by a function in a landing page, in the popup window. The
+           // window closes itself.
 
-             if (brx < alx) return 1;
-             if (arx < blx) return -1;
-             var aly = a.leftSE.point.y;
-             var bly = b.leftSE.point.y;
-             var ary = a.rightSE.point.y;
-             var bry = b.rightSE.point.y; // is left endpoint of segment B the right-more?
 
-             if (alx < blx) {
-               // are the two segments in the same horizontal plane?
-               if (bly < aly && bly < ary) return 1;
-               if (bly > aly && bly > ary) return -1; // is the B left endpoint colinear to segment A?
+           window.authComplete = function (token) {
+             var oauth_token = ohauth.stringQs(token.split('?')[1]);
+             get_access_token(oauth_token.oauth_token);
+             delete window.authComplete;
+           }; // ## Getting an request token
+           //
+           // At this point we have an `oauth_token`, brought in from a function
+           // call on a landing page popup.
 
-               var aCmpBLeft = a.comparePoint(b.leftSE.point);
-               if (aCmpBLeft < 0) return 1;
-               if (aCmpBLeft > 0) return -1; // is the A right endpoint colinear to segment B ?
 
-               var bCmpARight = b.comparePoint(a.rightSE.point);
-               if (bCmpARight !== 0) return bCmpARight; // colinear segments, consider the one with left-more
-               // left endpoint to be first (arbitrary?)
+           function get_access_token(oauth_token) {
+             var url = o.url + '/oauth/access_token',
+                 params = timenonce(getAuth(o)),
+                 request_token_secret = token('oauth_request_token_secret');
+             params.oauth_token = oauth_token;
+             params.oauth_signature = ohauth.signature(o.oauth_secret, request_token_secret, ohauth.baseString('POST', url, params)); // ## Getting an access token
+             //
+             // The final token required for authentication. At this point
+             // we have a `request token secret`
 
-               return -1;
-             } // is left endpoint of segment A the right-more?
+             ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+             o.loading();
+           }
 
+           function accessTokenDone(err, xhr) {
+             o.done();
+             if (err) return callback(err);
+             var access_token = ohauth.stringQs(xhr.response);
+             token('oauth_token', access_token.oauth_token);
+             token('oauth_token_secret', access_token.oauth_token_secret);
+             callback(null, oauth);
+           }
+         };
 
-             if (alx > blx) {
-               if (aly < bly && aly < bry) return -1;
-               if (aly > bly && aly > bry) return 1; // is the A left endpoint colinear to segment B?
+         oauth.bringPopupWindowToFront = function () {
+           var brougtPopupToFront = false;
 
-               var bCmpALeft = b.comparePoint(a.leftSE.point);
-               if (bCmpALeft !== 0) return bCmpALeft; // is the B right endpoint colinear to segment A?
+           try {
+             // This may cause a cross-origin error:
+             // `DOMException: Blocked a frame with origin "..." from accessing a cross-origin frame.`
+             if (oauth.popupWindow && !oauth.popupWindow.closed) {
+               oauth.popupWindow.focus();
+               brougtPopupToFront = true;
+             }
+           } catch (err) {// Bringing popup window to front failed (probably because of the cross-origin error mentioned above)
+           }
 
-               var aCmpBRight = a.comparePoint(b.rightSE.point);
-               if (aCmpBRight < 0) return 1;
-               if (aCmpBRight > 0) return -1; // colinear segments, consider the one with left-more
-               // left endpoint to be first (arbitrary?)
+           return brougtPopupToFront;
+         };
 
-               return 1;
-             } // if we get here, the two left endpoints are in the same
-             // vertical plane, ie alx === blx
-             // consider the lower left-endpoint to come first
+         oauth.bootstrapToken = function (oauth_token, callback) {
+           // ## Getting an request token
+           // At this point we have an `oauth_token`, brought in from a function
+           // call on a landing page popup.
+           function get_access_token(oauth_token) {
+             var url = o.url + '/oauth/access_token',
+                 params = timenonce(getAuth(o)),
+                 request_token_secret = token('oauth_request_token_secret');
+             params.oauth_token = oauth_token;
+             params.oauth_signature = ohauth.signature(o.oauth_secret, request_token_secret, ohauth.baseString('POST', url, params)); // ## Getting an access token
+             // The final token required for authentication. At this point
+             // we have a `request token secret`
 
+             ohauth.xhr('POST', url, params, null, {}, accessTokenDone);
+             o.loading();
+           }
 
-             if (aly < bly) return -1;
-             if (aly > bly) return 1; // left endpoints are identical
-             // check for colinearity by using the left-more right endpoint
-             // is the A right endpoint more left-more?
+           function accessTokenDone(err, xhr) {
+             o.done();
+             if (err) return callback(err);
+             var access_token = ohauth.stringQs(xhr.response);
+             token('oauth_token', access_token.oauth_token);
+             token('oauth_token_secret', access_token.oauth_token_secret);
+             callback(null, oauth);
+           }
 
-             if (arx < brx) {
-               var _bCmpARight = b.comparePoint(a.rightSE.point);
+           get_access_token(oauth_token);
+         }; // # xhr
+         //
+         // A single XMLHttpRequest wrapper that does authenticated calls if the
+         // user has logged in.
 
-               if (_bCmpARight !== 0) return _bCmpARight;
-             } // is the B right endpoint more left-more?
 
+         oauth.xhr = function (options, callback) {
+           if (!oauth.authenticated()) {
+             if (o.auto) {
+               return oauth.authenticate(run);
+             } else {
+               callback('not authenticated', null);
+               return;
+             }
+           } else {
+             return run();
+           }
 
-             if (arx > brx) {
-               var _aCmpBRight = a.comparePoint(b.rightSE.point);
+           function run() {
+             var params = timenonce(getAuth(o)),
+                 oauth_token_secret = token('oauth_token_secret'),
+                 url = options.prefix !== false ? o.url + options.path : options.path,
+                 url_parts = url.replace(/#.*$/, '').split('?', 2),
+                 base_url = url_parts[0],
+                 query = url_parts.length === 2 ? url_parts[1] : ''; // https://tools.ietf.org/html/rfc5849#section-3.4.1.3.1
 
-               if (_aCmpBRight < 0) return 1;
-               if (_aCmpBRight > 0) return -1;
+             if ((!options.options || !options.options.header || options.options.header['Content-Type'] === 'application/x-www-form-urlencoded') && options.content) {
+               params = xtend(params, ohauth.stringQs(options.content));
              }
 
-             if (arx !== brx) {
-               // are these two [almost] vertical segments with opposite orientation?
-               // if so, the one with the lower right endpoint comes first
-               var ay = ary - aly;
-               var ax = arx - alx;
-               var by = bry - bly;
-               var bx = brx - blx;
-               if (ay > ax && by < bx) return 1;
-               if (ay < ax && by > bx) return -1;
-             } // we have colinear segments with matching orientation
-             // consider the one with more left-more right endpoint to be first
+             params.oauth_token = token('oauth_token');
+             params.oauth_signature = ohauth.signature(o.oauth_secret, oauth_token_secret, ohauth.baseString(options.method, base_url, xtend(params, ohauth.stringQs(query))));
+             return ohauth.xhr(options.method, url, params, options.content, options.options, done);
+           }
 
+           function done(err, xhr) {
+             if (err) return callback(err);else if (xhr.responseXML) return callback(err, xhr.responseXML);else return callback(err, xhr.response);
+           }
+         }; // pre-authorize this object, if we can just get a token and token_secret
+         // from the start
 
-             if (arx > brx) return 1;
-             if (arx < brx) return -1; // if we get here, two two right endpoints are in the same
-             // vertical plane, ie arx === brx
-             // consider the lower right-endpoint to come first
 
-             if (ary < bry) return -1;
-             if (ary > bry) return 1; // right endpoints identical as well, so the segments are idential
-             // fall back on creation order as consistent tie-breaker
+         oauth.preauth = function (c) {
+           if (!c) return;
+           if (c.oauth_token) token('oauth_token', c.oauth_token);
+           if (c.oauth_token_secret) token('oauth_token_secret', c.oauth_token_secret);
+           return oauth;
+         };
 
-             if (a.id < b.id) return -1;
-             if (a.id > b.id) return 1; // identical segment, ie a === b
+         oauth.options = function (_) {
+           if (!arguments.length) return o;
+           o = _;
+           o.url = o.url || 'https://www.openstreetmap.org';
+           o.landing = o.landing || 'land.html';
+           o.singlepage = o.singlepage || false; // Optional loading and loading-done functions for nice UI feedback.
+           // by default, no-ops
 
-             return 0;
-           }
-           /* Warning: a reference to ringWindings input will be stored,
-            *  and possibly will be later modified */
+           o.loading = o.loading || function () {};
 
-         }]);
+           o.done = o.done || function () {};
 
-         function Segment(leftSE, rightSE, rings, windings) {
-           _classCallCheck$1(this, Segment);
+           return oauth.preauth(o);
+         }; // 'stamp' an authentication object from `getAuth()`
+         // with a [nonce](http://en.wikipedia.org/wiki/Cryptographic_nonce)
+         // and timestamp
 
-           this.id = ++segmentId;
-           this.leftSE = leftSE;
-           leftSE.segment = this;
-           leftSE.otherSE = rightSE;
-           this.rightSE = rightSE;
-           rightSE.segment = this;
-           rightSE.otherSE = leftSE;
-           this.rings = rings;
-           this.windings = windings; // left unset for performance, set later in algorithm
-           // this.ringOut, this.consumedBy, this.prev
-         }
 
-         _createClass$1(Segment, [{
-           key: "replaceRightSE",
+         function timenonce(o) {
+           o.oauth_timestamp = ohauth.timestamp();
+           o.oauth_nonce = ohauth.nonce();
+           return o;
+         } // get/set tokens. These are prefixed with the base URL so that `osm-auth`
+         // can be used with multiple APIs and the keys in `localStorage`
+         // will not clash
 
-           /* When a segment is split, the rightSE is replaced with a new sweep event */
-           value: function replaceRightSE(newRightSE) {
-             this.rightSE = newRightSE;
-             this.rightSE.segment = this;
-             this.rightSE.otherSE = this.leftSE;
-             this.leftSE.otherSE = this.rightSE;
-           }
-         }, {
-           key: "bbox",
-           value: function bbox() {
-             var y1 = this.leftSE.point.y;
-             var y2 = this.rightSE.point.y;
-             return {
-               ll: {
-                 x: this.leftSE.point.x,
-                 y: y1 < y2 ? y1 : y2
-               },
-               ur: {
-                 x: this.rightSE.point.x,
-                 y: y1 > y2 ? y1 : y2
-               }
-             };
-           }
-           /* A vector from the left point to the right */
 
-         }, {
-           key: "vector",
-           value: function vector() {
-             return {
-               x: this.rightSE.point.x - this.leftSE.point.x,
-               y: this.rightSE.point.y - this.leftSE.point.y
-             };
-           }
-         }, {
-           key: "isAnEndpoint",
-           value: function isAnEndpoint(pt) {
-             return pt.x === this.leftSE.point.x && pt.y === this.leftSE.point.y || pt.x === this.rightSE.point.x && pt.y === this.rightSE.point.y;
-           }
-           /* Compare this segment with a point.
-            *
-            * A point P is considered to be colinear to a segment if there
-            * exists a distance D such that if we travel along the segment
-            * from one * endpoint towards the other a distance D, we find
-            * ourselves at point P.
-            *
-            * Return value indicates:
-            *
-            *   1: point lies above the segment (to the left of vertical)
-            *   0: point is colinear to segment
-            *  -1: point lies below the segment (to the right of vertical)
-            */
+         var token;
 
-         }, {
-           key: "comparePoint",
-           value: function comparePoint(point) {
-             if (this.isAnEndpoint(point)) return 0;
-             var lPt = this.leftSE.point;
-             var rPt = this.rightSE.point;
-             var v = this.vector(); // Exactly vertical segments.
+         if (store.enabled) {
+           token = function token(x, y) {
+             if (arguments.length === 1) return store.get(o.url + x);else if (arguments.length === 2) return store.set(o.url + x, y);
+           };
+         } else {
+           var storage = {};
 
-             if (lPt.x === rPt.x) {
-               if (point.x === lPt.x) return 0;
-               return point.x < lPt.x ? 1 : -1;
-             } // Nearly vertical segments with an intersection.
-             // Check to see where a point on the line with matching Y coordinate is.
+           token = function token(x, y) {
+             if (arguments.length === 1) return storage[o.url + x];else if (arguments.length === 2) return storage[o.url + x] = y;
+           };
+         } // Get an authentication object. If you just add and remove properties
+         // from a single object, you'll need to use `delete` to make sure that
+         // it doesn't contain undesired properties for authentication
 
 
-             var yDist = (point.y - lPt.y) / v.y;
-             var xFromYDist = lPt.x + yDist * v.x;
-             if (point.x === xFromYDist) return 0; // General case.
-             // Check to see where a point on the line with matching X coordinate is.
+         function getAuth(o) {
+           return {
+             oauth_consumer_key: o.oauth_consumer_key,
+             oauth_signature_method: 'HMAC-SHA1'
+           };
+         } // potentially pre-authorize
 
-             var xDist = (point.x - lPt.x) / v.x;
-             var yFromXDist = lPt.y + xDist * v.y;
-             if (point.y === yFromXDist) return 0;
-             return point.y < yFromXDist ? -1 : 1;
-           }
-           /**
-            * Given another segment, returns the first non-trivial intersection
-            * between the two segments (in terms of sweep line ordering), if it exists.
-            *
-            * A 'non-trivial' intersection is one that will cause one or both of the
-            * segments to be split(). As such, 'trivial' vs. 'non-trivial' intersection:
-            *
-            *   * endpoint of segA with endpoint of segB --> trivial
-            *   * endpoint of segA with point along segB --> non-trivial
-            *   * endpoint of segB with point along segA --> non-trivial
-            *   * point along segA with point along segB --> non-trivial
-            *
-            * If no non-trivial intersection exists, return null
-            * Else, return null.
-            */
 
-         }, {
-           key: "getIntersection",
-           value: function getIntersection(other) {
-             // If bboxes don't overlap, there can't be any intersections
-             var tBbox = this.bbox();
-             var oBbox = other.bbox();
-             var bboxOverlap = getBboxOverlap(tBbox, oBbox);
-             if (bboxOverlap === null) return null; // We first check to see if the endpoints can be considered intersections.
-             // This will 'snap' intersections to endpoints if possible, and will
-             // handle cases of colinearity.
+         oauth.options(o);
+         return oauth;
+       };
 
-             var tlp = this.leftSE.point;
-             var trp = this.rightSE.point;
-             var olp = other.leftSE.point;
-             var orp = other.rightSE.point; // does each endpoint touch the other segment?
-             // note that we restrict the 'touching' definition to only allow segments
-             // to touch endpoints that lie forward from where we are in the sweep line pass
+       var tiler$2 = utilTiler();
+       var dispatch$2 = dispatch$8('apiStatusChange', 'authLoading', 'authDone', 'change', 'loading', 'loaded', 'loadedNotes');
+       var urlroot = 'https://www.openstreetmap.org';
+       var oauth = osmAuth({
+         url: urlroot,
+         oauth_consumer_key: '5A043yRSEugj4DJ5TljuapfnrflWDte8jTOcWLlT',
+         oauth_secret: 'aB3jKq1TRsCOUrfOIZ6oQMEDmv2ptV76PA54NGLL',
+         loading: authLoading,
+         done: authDone
+       }); // hardcode default block of Google Maps
 
-             var touchesOtherLSE = isInBbox(tBbox, olp) && this.comparePoint(olp) === 0;
-             var touchesThisLSE = isInBbox(oBbox, tlp) && other.comparePoint(tlp) === 0;
-             var touchesOtherRSE = isInBbox(tBbox, orp) && this.comparePoint(orp) === 0;
-             var touchesThisRSE = isInBbox(oBbox, trp) && other.comparePoint(trp) === 0; // do left endpoints match?
+       var _imageryBlocklists = [/.*\.google(apis)?\..*\/(vt|kh)[\?\/].*([xyz]=.*){3}.*/];
+       var _tileCache = {
+         toLoad: {},
+         loaded: {},
+         inflight: {},
+         seen: {},
+         rtree: new RBush()
+       };
+       var _noteCache = {
+         toLoad: {},
+         loaded: {},
+         inflight: {},
+         inflightPost: {},
+         note: {},
+         closed: {},
+         rtree: new RBush()
+       };
+       var _userCache = {
+         toLoad: {},
+         user: {}
+       };
 
-             if (touchesThisLSE && touchesOtherLSE) {
-               // these two cases are for colinear segments with matching left
-               // endpoints, and one segment being longer than the other
-               if (touchesThisRSE && !touchesOtherRSE) return trp;
-               if (!touchesThisRSE && touchesOtherRSE) return orp; // either the two segments match exactly (two trival intersections)
-               // or just on their left endpoint (one trivial intersection
+       var _cachedApiStatus;
 
-               return null;
-             } // does this left endpoint matches (other doesn't)
+       var _changeset = {};
 
+       var _deferred = new Set();
 
-             if (touchesThisLSE) {
-               // check for segments that just intersect on opposing endpoints
-               if (touchesOtherRSE) {
-                 if (tlp.x === orp.x && tlp.y === orp.y) return null;
-               } // t-intersection on left endpoint
+       var _connectionID = 1;
+       var _tileZoom = 16;
+       var _noteZoom = 12;
 
+       var _rateLimitError;
 
-               return tlp;
-             } // does other left endpoint matches (this doesn't)
+       var _userChangesets;
 
+       var _userDetails;
 
-             if (touchesOtherLSE) {
-               // check for segments that just intersect on opposing endpoints
-               if (touchesThisRSE) {
-                 if (trp.x === olp.x && trp.y === olp.y) return null;
-               } // t-intersection on left endpoint
+       var _off; // set a default but also load this from the API status
+
+
+       var _maxWayNodes = 2000;
+
+       function authLoading() {
+         dispatch$2.call('authLoading');
+       }
+
+       function authDone() {
+         dispatch$2.call('authDone');
+       }
 
+       function abortRequest$2(controllerOrXHR) {
+         if (controllerOrXHR) {
+           controllerOrXHR.abort();
+         }
+       }
 
-               return olp;
-             } // trivial intersection on right endpoints
+       function hasInflightRequests(cache) {
+         return Object.keys(cache.inflight).length;
+       }
 
+       function abortUnwantedRequests(cache, visibleTiles) {
+         Object.keys(cache.inflight).forEach(function (k) {
+           if (cache.toLoad[k]) return;
+           if (visibleTiles.find(function (tile) {
+             return k === tile.id;
+           })) return;
+           abortRequest$2(cache.inflight[k]);
+           delete cache.inflight[k];
+         });
+       }
 
-             if (touchesThisRSE && touchesOtherRSE) return null; // t-intersections on just one right endpoint
+       function getLoc(attrs) {
+         var lon = attrs.lon && attrs.lon.value;
+         var lat = attrs.lat && attrs.lat.value;
+         return [parseFloat(lon), parseFloat(lat)];
+       }
 
-             if (touchesThisRSE) return trp;
-             if (touchesOtherRSE) return orp; // None of our endpoints intersect. Look for a general intersection between
-             // infinite lines laid over the segments
+       function getNodes(obj) {
+         var elems = obj.getElementsByTagName('nd');
+         var nodes = new Array(elems.length);
 
-             var pt = intersection$1(tlp, this.vector(), olp, other.vector()); // are the segments parrallel? Note that if they were colinear with overlap,
-             // they would have an endpoint intersection and that case was already handled above
+         for (var i = 0, l = elems.length; i < l; i++) {
+           nodes[i] = 'n' + elems[i].attributes.ref.value;
+         }
 
-             if (pt === null) return null; // is the intersection found between the lines not on the segments?
+         return nodes;
+       }
 
-             if (!isInBbox(bboxOverlap, pt)) return null; // round the the computed point if needed
+       function getNodesJSON(obj) {
+         var elems = obj.nodes;
+         var nodes = new Array(elems.length);
 
-             return rounder.round(pt.x, pt.y);
-           }
-           /**
-            * Split the given segment into multiple segments on the given points.
-            *  * Each existing segment will retain its leftSE and a new rightSE will be
-            *    generated for it.
-            *  * A new segment will be generated which will adopt the original segment's
-            *    rightSE, and a new leftSE will be generated for it.
-            *  * If there are more than two points given to split on, new segments
-            *    in the middle will be generated with new leftSE and rightSE's.
-            *  * An array of the newly generated SweepEvents will be returned.
-            *
-            * Warning: input array of points is modified
-            */
+         for (var i = 0, l = elems.length; i < l; i++) {
+           nodes[i] = 'n' + elems[i];
+         }
 
-         }, {
-           key: "split",
-           value: function split(point) {
-             var newEvents = [];
-             var alreadyLinked = point.events !== undefined;
-             var newLeftSE = new SweepEvent$1(point, true);
-             var newRightSE = new SweepEvent$1(point, false);
-             var oldRightSE = this.rightSE;
-             this.replaceRightSE(newRightSE);
-             newEvents.push(newRightSE);
-             newEvents.push(newLeftSE);
-             var newSeg = new Segment(newLeftSE, oldRightSE, this.rings.slice(), this.windings.slice()); // when splitting a nearly vertical downward-facing segment,
-             // sometimes one of the resulting new segments is vertical, in which
-             // case its left and right events may need to be swapped
+         return nodes;
+       }
 
-             if (SweepEvent$1.comparePoints(newSeg.leftSE.point, newSeg.rightSE.point) > 0) {
-               newSeg.swapEvents();
-             }
+       function getTags(obj) {
+         var elems = obj.getElementsByTagName('tag');
+         var tags = {};
 
-             if (SweepEvent$1.comparePoints(this.leftSE.point, this.rightSE.point) > 0) {
-               this.swapEvents();
-             } // in the point we just used to create new sweep events with was already
-             // linked to other events, we need to check if either of the affected
-             // segments should be consumed
+         for (var i = 0, l = elems.length; i < l; i++) {
+           var attrs = elems[i].attributes;
+           tags[attrs.k.value] = attrs.v.value;
+         }
 
+         return tags;
+       }
 
-             if (alreadyLinked) {
-               newLeftSE.checkForConsuming();
-               newRightSE.checkForConsuming();
-             }
+       function getMembers(obj) {
+         var elems = obj.getElementsByTagName('member');
+         var members = new Array(elems.length);
 
-             return newEvents;
-           }
-           /* Swap which event is left and right */
+         for (var i = 0, l = elems.length; i < l; i++) {
+           var attrs = elems[i].attributes;
+           members[i] = {
+             id: attrs.type.value[0] + attrs.ref.value,
+             type: attrs.type.value,
+             role: attrs.role.value
+           };
+         }
 
-         }, {
-           key: "swapEvents",
-           value: function swapEvents() {
-             var tmpEvt = this.rightSE;
-             this.rightSE = this.leftSE;
-             this.leftSE = tmpEvt;
-             this.leftSE.isLeft = true;
-             this.rightSE.isLeft = false;
+         return members;
+       }
 
-             for (var i = 0, iMax = this.windings.length; i < iMax; i++) {
-               this.windings[i] *= -1;
-             }
-           }
-           /* Consume another segment. We take their rings under our wing
-            * and mark them as consumed. Use for perfectly overlapping segments */
+       function getMembersJSON(obj) {
+         var elems = obj.members;
+         var members = new Array(elems.length);
 
-         }, {
-           key: "consume",
-           value: function consume(other) {
-             var consumer = this;
-             var consumee = other;
+         for (var i = 0, l = elems.length; i < l; i++) {
+           var attrs = elems[i];
+           members[i] = {
+             id: attrs.type[0] + attrs.ref,
+             type: attrs.type,
+             role: attrs.role
+           };
+         }
 
-             while (consumer.consumedBy) {
-               consumer = consumer.consumedBy;
-             }
+         return members;
+       }
 
-             while (consumee.consumedBy) {
-               consumee = consumee.consumedBy;
-             }
+       function getVisible(attrs) {
+         return !attrs.visible || attrs.visible.value !== 'false';
+       }
 
-             var cmp = Segment.compare(consumer, consumee);
-             if (cmp === 0) return; // already consumed
-             // the winner of the consumption is the earlier segment
-             // according to sweep line ordering
+       function parseComments(comments) {
+         var parsedComments = []; // for each comment
 
-             if (cmp > 0) {
-               var tmp = consumer;
-               consumer = consumee;
-               consumee = tmp;
-             } // make sure a segment doesn't consume it's prev
+         for (var i = 0; i < comments.length; i++) {
+           var comment = comments[i];
 
+           if (comment.nodeName === 'comment') {
+             var childNodes = comment.childNodes;
+             var parsedComment = {};
 
-             if (consumer.prev === consumee) {
-               var _tmp = consumer;
-               consumer = consumee;
-               consumee = _tmp;
-             }
+             for (var j = 0; j < childNodes.length; j++) {
+               var node = childNodes[j];
+               var nodeName = node.nodeName;
+               if (nodeName === '#text') continue;
+               parsedComment[nodeName] = node.textContent;
 
-             for (var i = 0, iMax = consumee.rings.length; i < iMax; i++) {
-               var ring = consumee.rings[i];
-               var winding = consumee.windings[i];
-               var index = consumer.rings.indexOf(ring);
+               if (nodeName === 'uid') {
+                 var uid = node.textContent;
 
-               if (index === -1) {
-                 consumer.rings.push(ring);
-                 consumer.windings.push(winding);
-               } else consumer.windings[index] += winding;
+                 if (uid && !_userCache.user[uid]) {
+                   _userCache.toLoad[uid] = true;
+                 }
+               }
              }
 
-             consumee.rings = null;
-             consumee.windings = null;
-             consumee.consumedBy = consumer; // mark sweep events consumed as to maintain ordering in sweep event queue
-
-             consumee.leftSE.consumedBy = consumer.leftSE;
-             consumee.rightSE.consumedBy = consumer.rightSE;
-           }
-           /* The first segment previous segment chain that is in the result */
-
-         }, {
-           key: "prevInResult",
-           value: function prevInResult() {
-             if (this._prevInResult !== undefined) return this._prevInResult;
-             if (!this.prev) this._prevInResult = null;else if (this.prev.isInResult()) this._prevInResult = this.prev;else this._prevInResult = this.prev.prevInResult();
-             return this._prevInResult;
-           }
-         }, {
-           key: "beforeState",
-           value: function beforeState() {
-             if (this._beforeState !== undefined) return this._beforeState;
-             if (!this.prev) this._beforeState = {
-               rings: [],
-               windings: [],
-               multiPolys: []
-             };else {
-               var seg = this.prev.consumedBy || this.prev;
-               this._beforeState = seg.afterState();
+             if (parsedComment) {
+               parsedComments.push(parsedComment);
              }
-             return this._beforeState;
            }
-         }, {
-           key: "afterState",
-           value: function afterState() {
-             if (this._afterState !== undefined) return this._afterState;
-             var beforeState = this.beforeState();
-             this._afterState = {
-               rings: beforeState.rings.slice(0),
-               windings: beforeState.windings.slice(0),
-               multiPolys: []
-             };
-             var ringsAfter = this._afterState.rings;
-             var windingsAfter = this._afterState.windings;
-             var mpsAfter = this._afterState.multiPolys; // calculate ringsAfter, windingsAfter
-
-             for (var i = 0, iMax = this.rings.length; i < iMax; i++) {
-               var ring = this.rings[i];
-               var winding = this.windings[i];
-               var index = ringsAfter.indexOf(ring);
-
-               if (index === -1) {
-                 ringsAfter.push(ring);
-                 windingsAfter.push(winding);
-               } else windingsAfter[index] += winding;
-             } // calcualte polysAfter
-
+         }
 
-             var polysAfter = [];
-             var polysExclude = [];
+         return parsedComments;
+       }
 
-             for (var _i = 0, _iMax = ringsAfter.length; _i < _iMax; _i++) {
-               if (windingsAfter[_i] === 0) continue; // non-zero rule
+       function encodeNoteRtree(note) {
+         return {
+           minX: note.loc[0],
+           minY: note.loc[1],
+           maxX: note.loc[0],
+           maxY: note.loc[1],
+           data: note
+         };
+       }
 
-               var _ring = ringsAfter[_i];
-               var poly = _ring.poly;
-               if (polysExclude.indexOf(poly) !== -1) continue;
-               if (_ring.isExterior) polysAfter.push(poly);else {
-                 if (polysExclude.indexOf(poly) === -1) polysExclude.push(poly);
+       var jsonparsers = {
+         node: function nodeData(obj, uid) {
+           return new osmNode({
+             id: uid,
+             visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+             version: obj.version && obj.version.toString(),
+             changeset: obj.changeset && obj.changeset.toString(),
+             timestamp: obj.timestamp,
+             user: obj.user,
+             uid: obj.uid && obj.uid.toString(),
+             loc: [parseFloat(obj.lon), parseFloat(obj.lat)],
+             tags: obj.tags
+           });
+         },
+         way: function wayData(obj, uid) {
+           return new osmWay({
+             id: uid,
+             visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+             version: obj.version && obj.version.toString(),
+             changeset: obj.changeset && obj.changeset.toString(),
+             timestamp: obj.timestamp,
+             user: obj.user,
+             uid: obj.uid && obj.uid.toString(),
+             tags: obj.tags,
+             nodes: getNodesJSON(obj)
+           });
+         },
+         relation: function relationData(obj, uid) {
+           return new osmRelation({
+             id: uid,
+             visible: typeof obj.visible === 'boolean' ? obj.visible : true,
+             version: obj.version && obj.version.toString(),
+             changeset: obj.changeset && obj.changeset.toString(),
+             timestamp: obj.timestamp,
+             user: obj.user,
+             uid: obj.uid && obj.uid.toString(),
+             tags: obj.tags,
+             members: getMembersJSON(obj)
+           });
+         },
+         user: function parseUser(obj, uid) {
+           return {
+             id: uid,
+             display_name: obj.display_name,
+             account_created: obj.account_created,
+             image_url: obj.img && obj.img.href,
+             changesets_count: obj.changesets && obj.changesets.count && obj.changesets.count.toString() || '0',
+             active_blocks: obj.blocks && obj.blocks.received && obj.blocks.received.active && obj.blocks.received.active.toString() || '0'
+           };
+         }
+       };
 
-                 var _index = polysAfter.indexOf(_ring.poly);
+       function parseJSON(payload, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
 
-                 if (_index !== -1) polysAfter.splice(_index, 1);
-               }
-             } // calculate multiPolysAfter
+         if (!payload) {
+           return callback({
+             message: 'No JSON',
+             status: -1
+           });
+         }
 
+         var json = payload;
+         if (_typeof(json) !== 'object') json = JSON.parse(payload);
+         if (!json.elements) return callback({
+           message: 'No JSON',
+           status: -1
+         });
+         var children = json.elements;
+         var handle = window.requestIdleCallback(function () {
+           _deferred["delete"](handle);
 
-             for (var _i2 = 0, _iMax2 = polysAfter.length; _i2 < _iMax2; _i2++) {
-               var mp = polysAfter[_i2].multiPoly;
-               if (mpsAfter.indexOf(mp) === -1) mpsAfter.push(mp);
-             }
+           var results = [];
+           var result;
 
-             return this._afterState;
+           for (var i = 0; i < children.length; i++) {
+             result = parseChild(children[i]);
+             if (result) results.push(result);
            }
-           /* Is this segment part of the final result? */
-
-         }, {
-           key: "isInResult",
-           value: function isInResult() {
-             // if we've been consumed, we're not in the result
-             if (this.consumedBy) return false;
-             if (this._isInResult !== undefined) return this._isInResult;
-             var mpsBefore = this.beforeState().multiPolys;
-             var mpsAfter = this.afterState().multiPolys;
-
-             switch (operation.type) {
-               case 'union':
-                 {
-                   // UNION - included iff:
-                   //  * On one side of us there is 0 poly interiors AND
-                   //  * On the other side there is 1 or more.
-                   var noBefores = mpsBefore.length === 0;
-                   var noAfters = mpsAfter.length === 0;
-                   this._isInResult = noBefores !== noAfters;
-                   break;
-                 }
 
-               case 'intersection':
-                 {
-                   // INTERSECTION - included iff:
-                   //  * on one side of us all multipolys are rep. with poly interiors AND
-                   //  * on the other side of us, not all multipolys are repsented
-                   //    with poly interiors
-                   var least;
-                   var most;
+           callback(null, results);
+         });
 
-                   if (mpsBefore.length < mpsAfter.length) {
-                     least = mpsBefore.length;
-                     most = mpsAfter.length;
-                   } else {
-                     least = mpsAfter.length;
-                     most = mpsBefore.length;
-                   }
+         _deferred.add(handle);
 
-                   this._isInResult = most === operation.numMultiPolys && least < most;
-                   break;
-                 }
+         function parseChild(child) {
+           var parser = jsonparsers[child.type];
+           if (!parser) return null;
+           var uid;
+           uid = osmEntity.id.fromOSM(child.type, child.id);
 
-               case 'xor':
-                 {
-                   // XOR - included iff:
-                   //  * the difference between the number of multipolys represented
-                   //    with poly interiors on our two sides is an odd number
-                   var diff = Math.abs(mpsBefore.length - mpsAfter.length);
-                   this._isInResult = diff % 2 === 1;
-                   break;
-                 }
+           if (options.skipSeen) {
+             if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-               case 'difference':
-                 {
-                   // DIFFERENCE included iff:
-                   //  * on exactly one side, we have just the subject
-                   var isJustSubject = function isJustSubject(mps) {
-                     return mps.length === 1 && mps[0].isSubject;
-                   };
+             _tileCache.seen[uid] = true;
+           }
 
-                   this._isInResult = isJustSubject(mpsBefore) !== isJustSubject(mpsAfter);
-                   break;
-                 }
+           return parser(child, uid);
+         }
+       }
 
-               default:
-                 throw new Error("Unrecognized operation type found ".concat(operation.type));
-             }
+       function parseUserJSON(payload, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
 
-             return this._isInResult;
-           }
-         }], [{
-           key: "fromRing",
-           value: function fromRing(pt1, pt2, ring) {
-             var leftPt, rightPt, winding; // ordering the two points according to sweep line ordering
+         if (!payload) {
+           return callback({
+             message: 'No JSON',
+             status: -1
+           });
+         }
 
-             var cmpPts = SweepEvent$1.comparePoints(pt1, pt2);
+         var json = payload;
+         if (_typeof(json) !== 'object') json = JSON.parse(payload);
+         if (!json.users && !json.user) return callback({
+           message: 'No JSON',
+           status: -1
+         });
+         var objs = json.users || [json];
+         var handle = window.requestIdleCallback(function () {
+           _deferred["delete"](handle);
 
-             if (cmpPts < 0) {
-               leftPt = pt1;
-               rightPt = pt2;
-               winding = 1;
-             } else if (cmpPts > 0) {
-               leftPt = pt2;
-               rightPt = pt1;
-               winding = -1;
-             } else throw new Error("Tried to create degenerate segment at [".concat(pt1.x, ", ").concat(pt1.y, "]"));
+           var results = [];
+           var result;
 
-             var leftSE = new SweepEvent$1(leftPt, true);
-             var rightSE = new SweepEvent$1(rightPt, false);
-             return new Segment(leftSE, rightSE, [ring], [winding]);
+           for (var i = 0; i < objs.length; i++) {
+             result = parseObj(objs[i]);
+             if (result) results.push(result);
            }
-         }]);
 
-         return Segment;
-       }();
+           callback(null, results);
+         });
 
-       var RingIn = /*#__PURE__*/function () {
-         function RingIn(geomRing, poly, isExterior) {
-           _classCallCheck$1(this, RingIn);
+         _deferred.add(handle);
 
-           if (!Array.isArray(geomRing) || geomRing.length === 0) {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+         function parseObj(obj) {
+           var uid = obj.user.id && obj.user.id.toString();
+
+           if (options.skipSeen && _userCache.user[uid]) {
+             delete _userCache.toLoad[uid];
+             return null;
            }
 
-           this.poly = poly;
-           this.isExterior = isExterior;
-           this.segments = [];
+           var user = jsonparsers.user(obj.user, uid);
+           _userCache.user[uid] = user;
+           delete _userCache.toLoad[uid];
+           return user;
+         }
+       }
 
-           if (typeof geomRing[0][0] !== 'number' || typeof geomRing[0][1] !== 'number') {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
-           }
+       var parsers = {
+         node: function nodeData(obj, uid) {
+           var attrs = obj.attributes;
+           return new osmNode({
+             id: uid,
+             visible: getVisible(attrs),
+             version: attrs.version.value,
+             changeset: attrs.changeset && attrs.changeset.value,
+             timestamp: attrs.timestamp && attrs.timestamp.value,
+             user: attrs.user && attrs.user.value,
+             uid: attrs.uid && attrs.uid.value,
+             loc: getLoc(attrs),
+             tags: getTags(obj)
+           });
+         },
+         way: function wayData(obj, uid) {
+           var attrs = obj.attributes;
+           return new osmWay({
+             id: uid,
+             visible: getVisible(attrs),
+             version: attrs.version.value,
+             changeset: attrs.changeset && attrs.changeset.value,
+             timestamp: attrs.timestamp && attrs.timestamp.value,
+             user: attrs.user && attrs.user.value,
+             uid: attrs.uid && attrs.uid.value,
+             tags: getTags(obj),
+             nodes: getNodes(obj)
+           });
+         },
+         relation: function relationData(obj, uid) {
+           var attrs = obj.attributes;
+           return new osmRelation({
+             id: uid,
+             visible: getVisible(attrs),
+             version: attrs.version.value,
+             changeset: attrs.changeset && attrs.changeset.value,
+             timestamp: attrs.timestamp && attrs.timestamp.value,
+             user: attrs.user && attrs.user.value,
+             uid: attrs.uid && attrs.uid.value,
+             tags: getTags(obj),
+             members: getMembers(obj)
+           });
+         },
+         note: function parseNote(obj, uid) {
+           var attrs = obj.attributes;
+           var childNodes = obj.childNodes;
+           var props = {};
+           props.id = uid;
+           props.loc = getLoc(attrs); // if notes are coincident, move them apart slightly
 
-           var firstPoint = rounder.round(geomRing[0][0], geomRing[0][1]);
-           this.bbox = {
-             ll: {
-               x: firstPoint.x,
-               y: firstPoint.y
-             },
-             ur: {
-               x: firstPoint.x,
-               y: firstPoint.y
-             }
-           };
-           var prevPoint = firstPoint;
+           var coincident = false;
+           var epsilon = 0.00001;
 
-           for (var i = 1, iMax = geomRing.length; i < iMax; i++) {
-             if (typeof geomRing[i][0] !== 'number' || typeof geomRing[i][1] !== 'number') {
-               throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           do {
+             if (coincident) {
+               props.loc = geoVecAdd(props.loc, [epsilon, epsilon]);
              }
 
-             var point = rounder.round(geomRing[i][0], geomRing[i][1]); // skip repeated points
+             var bbox = geoExtent(props.loc).bbox();
+             coincident = _noteCache.rtree.search(bbox).length;
+           } while (coincident); // parse note contents
 
-             if (point.x === prevPoint.x && point.y === prevPoint.y) continue;
-             this.segments.push(Segment.fromRing(prevPoint, point, this));
-             if (point.x < this.bbox.ll.x) this.bbox.ll.x = point.x;
-             if (point.y < this.bbox.ll.y) this.bbox.ll.y = point.y;
-             if (point.x > this.bbox.ur.x) this.bbox.ur.x = point.x;
-             if (point.y > this.bbox.ur.y) this.bbox.ur.y = point.y;
-             prevPoint = point;
-           } // add segment from last to first if last is not the same as first
 
+           for (var i = 0; i < childNodes.length; i++) {
+             var node = childNodes[i];
+             var nodeName = node.nodeName;
+             if (nodeName === '#text') continue; // if the element is comments, parse the comments
 
-           if (firstPoint.x !== prevPoint.x || firstPoint.y !== prevPoint.y) {
-             this.segments.push(Segment.fromRing(prevPoint, firstPoint, this));
+             if (nodeName === 'comments') {
+               props[nodeName] = parseComments(node.childNodes);
+             } else {
+               props[nodeName] = node.textContent;
+             }
            }
-         }
 
-         _createClass$1(RingIn, [{
-           key: "getSweepEvents",
-           value: function getSweepEvents() {
-             var sweepEvents = [];
+           var note = new osmNote(props);
+           var item = encodeNoteRtree(note);
+           _noteCache.note[note.id] = note;
 
-             for (var i = 0, iMax = this.segments.length; i < iMax; i++) {
-               var segment = this.segments[i];
-               sweepEvents.push(segment.leftSE);
-               sweepEvents.push(segment.rightSE);
-             }
+           _noteCache.rtree.insert(item);
 
-             return sweepEvents;
-           }
-         }]);
+           return note;
+         },
+         user: function parseUser(obj, uid) {
+           var attrs = obj.attributes;
+           var user = {
+             id: uid,
+             display_name: attrs.display_name && attrs.display_name.value,
+             account_created: attrs.account_created && attrs.account_created.value,
+             changesets_count: '0',
+             active_blocks: '0'
+           };
+           var img = obj.getElementsByTagName('img');
 
-         return RingIn;
-       }();
+           if (img && img[0] && img[0].getAttribute('href')) {
+             user.image_url = img[0].getAttribute('href');
+           }
 
-       var PolyIn = /*#__PURE__*/function () {
-         function PolyIn(geomPoly, multiPoly) {
-           _classCallCheck$1(this, PolyIn);
+           var changesets = obj.getElementsByTagName('changesets');
 
-           if (!Array.isArray(geomPoly)) {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           if (changesets && changesets[0] && changesets[0].getAttribute('count')) {
+             user.changesets_count = changesets[0].getAttribute('count');
            }
 
-           this.exteriorRing = new RingIn(geomPoly[0], this, true); // copy by value
+           var blocks = obj.getElementsByTagName('blocks');
 
-           this.bbox = {
-             ll: {
-               x: this.exteriorRing.bbox.ll.x,
-               y: this.exteriorRing.bbox.ll.y
-             },
-             ur: {
-               x: this.exteriorRing.bbox.ur.x,
-               y: this.exteriorRing.bbox.ur.y
-             }
-           };
-           this.interiorRings = [];
+           if (blocks && blocks[0]) {
+             var received = blocks[0].getElementsByTagName('received');
 
-           for (var i = 1, iMax = geomPoly.length; i < iMax; i++) {
-             var ring = new RingIn(geomPoly[i], this, false);
-             if (ring.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = ring.bbox.ll.x;
-             if (ring.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = ring.bbox.ll.y;
-             if (ring.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = ring.bbox.ur.x;
-             if (ring.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = ring.bbox.ur.y;
-             this.interiorRings.push(ring);
+             if (received && received[0] && received[0].getAttribute('active')) {
+               user.active_blocks = received[0].getAttribute('active');
+             }
            }
 
-           this.multiPoly = multiPoly;
+           _userCache.user[uid] = user;
+           delete _userCache.toLoad[uid];
+           return user;
          }
+       };
 
-         _createClass$1(PolyIn, [{
-           key: "getSweepEvents",
-           value: function getSweepEvents() {
-             var sweepEvents = this.exteriorRing.getSweepEvents();
-
-             for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
-               var ringSweepEvents = this.interiorRings[i].getSweepEvents();
-
-               for (var j = 0, jMax = ringSweepEvents.length; j < jMax; j++) {
-                 sweepEvents.push(ringSweepEvents[j]);
-               }
-             }
+       function parseXML(xml, callback, options) {
+         options = Object.assign({
+           skipSeen: true
+         }, options);
 
-             return sweepEvents;
-           }
-         }]);
+         if (!xml || !xml.childNodes) {
+           return callback({
+             message: 'No XML',
+             status: -1
+           });
+         }
 
-         return PolyIn;
-       }();
+         var root = xml.childNodes[0];
+         var children = root.childNodes;
+         var handle = window.requestIdleCallback(function () {
+           _deferred["delete"](handle);
 
-       var MultiPolyIn = /*#__PURE__*/function () {
-         function MultiPolyIn(geom, isSubject) {
-           _classCallCheck$1(this, MultiPolyIn);
+           var results = [];
+           var result;
 
-           if (!Array.isArray(geom)) {
-             throw new Error('Input geometry is not a valid Polygon or MultiPolygon');
+           for (var i = 0; i < children.length; i++) {
+             result = parseChild(children[i]);
+             if (result) results.push(result);
            }
 
-           try {
-             // if the input looks like a polygon, convert it to a multipolygon
-             if (typeof geom[0][0][0] === 'number') geom = [geom];
-           } catch (ex) {// The input is either malformed or has empty arrays.
-             // In either case, it will be handled later on.
-           }
+           callback(null, results);
+         });
 
-           this.polys = [];
-           this.bbox = {
-             ll: {
-               x: Number.POSITIVE_INFINITY,
-               y: Number.POSITIVE_INFINITY
-             },
-             ur: {
-               x: Number.NEGATIVE_INFINITY,
-               y: Number.NEGATIVE_INFINITY
-             }
-           };
+         _deferred.add(handle);
 
-           for (var i = 0, iMax = geom.length; i < iMax; i++) {
-             var poly = new PolyIn(geom[i], this);
-             if (poly.bbox.ll.x < this.bbox.ll.x) this.bbox.ll.x = poly.bbox.ll.x;
-             if (poly.bbox.ll.y < this.bbox.ll.y) this.bbox.ll.y = poly.bbox.ll.y;
-             if (poly.bbox.ur.x > this.bbox.ur.x) this.bbox.ur.x = poly.bbox.ur.x;
-             if (poly.bbox.ur.y > this.bbox.ur.y) this.bbox.ur.y = poly.bbox.ur.y;
-             this.polys.push(poly);
-           }
+         function parseChild(child) {
+           var parser = parsers[child.nodeName];
+           if (!parser) return null;
+           var uid;
 
-           this.isSubject = isSubject;
-         }
+           if (child.nodeName === 'user') {
+             uid = child.attributes.id.value;
 
-         _createClass$1(MultiPolyIn, [{
-           key: "getSweepEvents",
-           value: function getSweepEvents() {
-             var sweepEvents = [];
+             if (options.skipSeen && _userCache.user[uid]) {
+               delete _userCache.toLoad[uid];
+               return null;
+             }
+           } else if (child.nodeName === 'note') {
+             uid = child.getElementsByTagName('id')[0].textContent;
+           } else {
+             uid = osmEntity.id.fromOSM(child.nodeName, child.attributes.id.value);
 
-             for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
-               var polySweepEvents = this.polys[i].getSweepEvents();
+             if (options.skipSeen) {
+               if (_tileCache.seen[uid]) return null; // avoid reparsing a "seen" entity
 
-               for (var j = 0, jMax = polySweepEvents.length; j < jMax; j++) {
-                 sweepEvents.push(polySweepEvents[j]);
-               }
+               _tileCache.seen[uid] = true;
              }
-
-             return sweepEvents;
            }
-         }]);
-
-         return MultiPolyIn;
-       }();
 
-       var RingOut = /*#__PURE__*/function () {
-         _createClass$1(RingOut, null, [{
-           key: "factory",
+           return parser(child, uid);
+         }
+       } // replace or remove note from rtree
 
-           /* Given the segments from the sweep line pass, compute & return a series
-            * of closed rings from all the segments marked to be part of the result */
-           value: function factory(allSegments) {
-             var ringsOut = [];
 
-             for (var i = 0, iMax = allSegments.length; i < iMax; i++) {
-               var segment = allSegments[i];
-               if (!segment.isInResult() || segment.ringOut) continue;
-               var prevEvent = null;
-               var event = segment.leftSE;
-               var nextEvent = segment.rightSE;
-               var events = [event];
-               var startingPoint = event.point;
-               var intersectionLEs = [];
-               /* Walk the chain of linked events to form a closed ring */
+       function updateRtree(item, replace) {
+         _noteCache.rtree.remove(item, function isEql(a, b) {
+           return a.data.id === b.data.id;
+         });
 
-               while (true) {
-                 prevEvent = event;
-                 event = nextEvent;
-                 events.push(event);
-                 /* Is the ring complete? */
+         if (replace) {
+           _noteCache.rtree.insert(item);
+         }
+       }
 
-                 if (event.point === startingPoint) break;
+       function wrapcb(thisArg, callback, cid) {
+         return function (err, result) {
+           if (err) {
+             // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
+             if (err.status === 400 || err.status === 401 || err.status === 403) {
+               thisArg.logout();
+             }
 
-                 while (true) {
-                   var availableLEs = event.getAvailableLinkedEvents();
-                   /* Did we hit a dead end? This shouldn't happen. Indicates some earlier
-                    * part of the algorithm malfunctioned... please file a bug report. */
+             return callback.call(thisArg, err);
+           } else if (thisArg.getConnectionId() !== cid) {
+             return callback.call(thisArg, {
+               message: 'Connection Switched',
+               status: -1
+             });
+           } else {
+             return callback.call(thisArg, err, result);
+           }
+         };
+       }
 
-                   if (availableLEs.length === 0) {
-                     var firstPt = events[0].point;
-                     var lastPt = events[events.length - 1].point;
-                     throw new Error("Unable to complete output ring starting at [".concat(firstPt.x, ",") + " ".concat(firstPt.y, "]. Last matching segment found ends at") + " [".concat(lastPt.x, ", ").concat(lastPt.y, "]."));
-                   }
-                   /* Only one way to go, so cotinue on the path */
+       var serviceOsm = {
+         init: function init() {
+           utilRebind(this, dispatch$2, 'on');
+         },
+         reset: function reset() {
+           Array.from(_deferred).forEach(function (handle) {
+             window.cancelIdleCallback(handle);
 
+             _deferred["delete"](handle);
+           });
+           _connectionID++;
+           _userChangesets = undefined;
+           _userDetails = undefined;
+           _rateLimitError = undefined;
+           Object.values(_tileCache.inflight).forEach(abortRequest$2);
+           Object.values(_noteCache.inflight).forEach(abortRequest$2);
+           Object.values(_noteCache.inflightPost).forEach(abortRequest$2);
+           if (_changeset.inflight) abortRequest$2(_changeset.inflight);
+           _tileCache = {
+             toLoad: {},
+             loaded: {},
+             inflight: {},
+             seen: {},
+             rtree: new RBush()
+           };
+           _noteCache = {
+             toLoad: {},
+             loaded: {},
+             inflight: {},
+             inflightPost: {},
+             note: {},
+             closed: {},
+             rtree: new RBush()
+           };
+           _userCache = {
+             toLoad: {},
+             user: {}
+           };
+           _cachedApiStatus = undefined;
+           _changeset = {};
+           return this;
+         },
+         getConnectionId: function getConnectionId() {
+           return _connectionID;
+         },
+         changesetURL: function changesetURL(changesetID) {
+           return urlroot + '/changeset/' + changesetID;
+         },
+         changesetsURL: function changesetsURL(center, zoom) {
+           var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+           return urlroot + '/history#map=' + Math.floor(zoom) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+         },
+         entityURL: function entityURL(entity) {
+           return urlroot + '/' + entity.type + '/' + entity.osmId();
+         },
+         historyURL: function historyURL(entity) {
+           return urlroot + '/' + entity.type + '/' + entity.osmId() + '/history';
+         },
+         userURL: function userURL(username) {
+           return urlroot + '/user/' + encodeURIComponent(username);
+         },
+         noteURL: function noteURL(note) {
+           return urlroot + '/note/' + note.id;
+         },
+         noteReportURL: function noteReportURL(note) {
+           return urlroot + '/reports/new?reportable_type=Note&reportable_id=' + note.id;
+         },
+         // Generic method to load data from the OSM API
+         // Can handle either auth or unauth calls.
+         loadFromAPI: function loadFromAPI(path, callback, options) {
+           options = Object.assign({
+             skipSeen: true
+           }, options);
+           var that = this;
+           var cid = _connectionID;
 
-                   if (availableLEs.length === 1) {
-                     nextEvent = availableLEs[0].otherSE;
-                     break;
-                   }
-                   /* We must have an intersection. Check for a completed loop */
+           function done(err, payload) {
+             if (that.getConnectionId() !== cid) {
+               if (callback) callback({
+                 message: 'Connection Switched',
+                 status: -1
+               });
+               return;
+             }
 
+             var isAuthenticated = that.authenticated(); // 400 Bad Request, 401 Unauthorized, 403 Forbidden
+             // Logout and retry the request..
 
-                   var indexLE = null;
+             if (isAuthenticated && err && err.status && (err.status === 400 || err.status === 401 || err.status === 403)) {
+               that.logout();
+               that.loadFromAPI(path, callback, options); // else, no retry..
+             } else {
+               // 509 Bandwidth Limit Exceeded, 429 Too Many Requests
+               // Set the rateLimitError flag and trigger a warning..
+               if (!isAuthenticated && !_rateLimitError && err && err.status && (err.status === 509 || err.status === 429)) {
+                 _rateLimitError = err;
+                 dispatch$2.call('change');
+                 that.reloadApiStatus();
+               } else if (err && _cachedApiStatus === 'online' || !err && _cachedApiStatus !== 'online') {
+                 // If the response's error state doesn't match the status,
+                 // it's likely we lost or gained the connection so reload the status
+                 that.reloadApiStatus();
+               }
 
-                   for (var j = 0, jMax = intersectionLEs.length; j < jMax; j++) {
-                     if (intersectionLEs[j].point === event.point) {
-                       indexLE = j;
-                       break;
-                     }
+               if (callback) {
+                 if (err) {
+                   return callback(err);
+                 } else {
+                   if (path.indexOf('.json') !== -1) {
+                     return parseJSON(payload, callback, options);
+                   } else {
+                     return parseXML(payload, callback, options);
                    }
-                   /* Found a completed loop. Cut that off and make a ring */
+                 }
+               }
+             }
+           }
 
+           if (this.authenticated()) {
+             return oauth.xhr({
+               method: 'GET',
+               path: path
+             }, done);
+           } else {
+             var url = urlroot + path;
+             var controller = new AbortController();
+             var fn;
 
-                   if (indexLE !== null) {
-                     var intersectionLE = intersectionLEs.splice(indexLE)[0];
-                     var ringEvents = events.splice(intersectionLE.index);
-                     ringEvents.unshift(ringEvents[0].otherSE);
-                     ringsOut.push(new RingOut(ringEvents.reverse()));
-                     continue;
-                   }
-                   /* register the intersection */
+             if (path.indexOf('.json') !== -1) {
+               fn = d3_json;
+             } else {
+               fn = d3_xml;
+             }
 
+             fn(url, {
+               signal: controller.signal
+             }).then(function (data) {
+               done(null, data);
+             })["catch"](function (err) {
+               if (err.name === 'AbortError') return; // d3-fetch includes status in the error message,
+               // but we can't access the response itself
+               // https://github.com/d3/d3-fetch/issues/27
 
-                   intersectionLEs.push({
-                     index: events.length,
-                     point: event.point
-                   });
-                   /* Choose the left-most option to continue the walk */
+               var match = err.message.match(/^\d{3}/);
 
-                   var comparator = event.getLeftmostComparator(prevEvent);
-                   nextEvent = availableLEs.sort(comparator)[0].otherSE;
-                   break;
-                 }
+               if (match) {
+                 done({
+                   status: +match[0],
+                   statusText: err.message
+                 });
+               } else {
+                 done(err.message);
                }
-
-               ringsOut.push(new RingOut(events));
-             }
-
-             return ringsOut;
+             });
+             return controller;
            }
-         }]);
-
-         function RingOut(events) {
-           _classCallCheck$1(this, RingOut);
+         },
+         // Load a single entity by id (ways and relations use the `/full` call to include
+         // nodes and members). Parent relations are not included, see `loadEntityRelations`.
+         // GET /api/0.6/node/#id
+         // GET /api/0.6/[way|relation]/#id/full
+         loadEntity: function loadEntity(id, callback) {
+           var type = osmEntity.id.type(id);
+           var osmID = osmEntity.id.toOSM(id);
+           var options = {
+             skipSeen: false
+           };
+           this.loadFromAPI('/api/0.6/' + type + '/' + osmID + (type !== 'node' ? '/full' : '') + '.json', function (err, entities) {
+             if (callback) callback(err, {
+               data: entities
+             });
+           }, options);
+         },
+         // Load a single entity with a specific version
+         // GET /api/0.6/[node|way|relation]/#id/#version
+         loadEntityVersion: function loadEntityVersion(id, version, callback) {
+           var type = osmEntity.id.type(id);
+           var osmID = osmEntity.id.toOSM(id);
+           var options = {
+             skipSeen: false
+           };
+           this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/' + version + '.json', function (err, entities) {
+             if (callback) callback(err, {
+               data: entities
+             });
+           }, options);
+         },
+         // Load the relations of a single entity with the given.
+         // GET /api/0.6/[node|way|relation]/#id/relations
+         loadEntityRelations: function loadEntityRelations(id, callback) {
+           var type = osmEntity.id.type(id);
+           var osmID = osmEntity.id.toOSM(id);
+           var options = {
+             skipSeen: false
+           };
+           this.loadFromAPI('/api/0.6/' + type + '/' + osmID + '/relations.json', function (err, entities) {
+             if (callback) callback(err, {
+               data: entities
+             });
+           }, options);
+         },
+         // Load multiple entities in chunks
+         // (note: callback may be called multiple times)
+         // Unlike `loadEntity`, child nodes and members are not fetched
+         // GET /api/0.6/[nodes|ways|relations]?#parameters
+         loadMultiple: function loadMultiple(ids, callback) {
+           var that = this;
+           var groups = utilArrayGroupBy(utilArrayUniq(ids), osmEntity.id.type);
+           Object.keys(groups).forEach(function (k) {
+             var type = k + 's'; // nodes, ways, relations
 
-           this.events = events;
+             var osmIDs = groups[k].map(function (id) {
+               return osmEntity.id.toOSM(id);
+             });
+             var options = {
+               skipSeen: false
+             };
+             utilArrayChunk(osmIDs, 150).forEach(function (arr) {
+               that.loadFromAPI('/api/0.6/' + type + '.json?' + type + '=' + arr.join(), function (err, entities) {
+                 if (callback) callback(err, {
+                   data: entities
+                 });
+               }, options);
+             });
+           });
+         },
+         // Create, upload, and close a changeset
+         // PUT /api/0.6/changeset/create
+         // POST /api/0.6/changeset/#id/upload
+         // PUT /api/0.6/changeset/#id/close
+         putChangeset: function putChangeset(changeset, changes, callback) {
+           var cid = _connectionID;
 
-           for (var i = 0, iMax = events.length; i < iMax; i++) {
-             events[i].segment.ringOut = this;
+           if (_changeset.inflight) {
+             return callback({
+               message: 'Changeset already inflight',
+               status: -2
+             }, changeset);
+           } else if (_changeset.open) {
+             // reuse existing open changeset..
+             return createdChangeset.call(this, null, _changeset.open);
+           } else {
+             // Open a new changeset..
+             var options = {
+               method: 'PUT',
+               path: '/api/0.6/changeset/create',
+               options: {
+                 header: {
+                   'Content-Type': 'text/xml'
+                 }
+               },
+               content: JXON.stringify(changeset.asJXON())
+             };
+             _changeset.inflight = oauth.xhr(options, wrapcb(this, createdChangeset, cid));
            }
 
-           this.poly = null;
-         }
-
-         _createClass$1(RingOut, [{
-           key: "getGeom",
-           value: function getGeom() {
-             // Remove superfluous points (ie extra points along a straight line),
-             var prevPt = this.events[0].point;
-             var points = [prevPt];
+           function createdChangeset(err, changesetID) {
+             _changeset.inflight = null;
 
-             for (var i = 1, iMax = this.events.length - 1; i < iMax; i++) {
-               var _pt = this.events[i].point;
-               var _nextPt = this.events[i + 1].point;
-               if (compareVectorAngles(_pt, prevPt, _nextPt) === 0) continue;
-               points.push(_pt);
-               prevPt = _pt;
-             } // ring was all (within rounding error of angle calc) colinear points
+             if (err) {
+               return callback(err, changeset);
+             }
 
+             _changeset.open = changesetID;
+             changeset = changeset.update({
+               id: changesetID
+             }); // Upload the changeset..
 
-             if (points.length === 1) return null; // check if the starting point is necessary
+             var options = {
+               method: 'POST',
+               path: '/api/0.6/changeset/' + changesetID + '/upload',
+               options: {
+                 header: {
+                   'Content-Type': 'text/xml'
+                 }
+               },
+               content: JXON.stringify(changeset.osmChangeJXON(changes))
+             };
+             _changeset.inflight = oauth.xhr(options, wrapcb(this, uploadedChangeset, cid));
+           }
 
-             var pt = points[0];
-             var nextPt = points[1];
-             if (compareVectorAngles(pt, prevPt, nextPt) === 0) points.shift();
-             points.push(points[0]);
-             var step = this.isExteriorRing() ? 1 : -1;
-             var iStart = this.isExteriorRing() ? 0 : points.length - 1;
-             var iEnd = this.isExteriorRing() ? points.length : -1;
-             var orderedPoints = [];
+           function uploadedChangeset(err) {
+             _changeset.inflight = null;
+             if (err) return callback(err, changeset); // Upload was successful, safe to call the callback.
+             // Add delay to allow for postgres replication #1646 #2678
 
-             for (var _i = iStart; _i != iEnd; _i += step) {
-               orderedPoints.push([points[_i].x, points[_i].y]);
-             }
+             window.setTimeout(function () {
+               callback(null, changeset);
+             }, 2500);
+             _changeset.open = null; // At this point, we don't really care if the connection was switched..
+             // Only try to close the changeset if we're still talking to the same server.
 
-             return orderedPoints;
-           }
-         }, {
-           key: "isExteriorRing",
-           value: function isExteriorRing() {
-             if (this._isExteriorRing === undefined) {
-               var enclosing = this.enclosingRing();
-               this._isExteriorRing = enclosing ? !enclosing.isExteriorRing() : true;
+             if (this.getConnectionId() === cid) {
+               // Still attempt to close changeset, but ignore response because #2667
+               oauth.xhr({
+                 method: 'PUT',
+                 path: '/api/0.6/changeset/' + changeset.id + '/close',
+                 options: {
+                   header: {
+                     'Content-Type': 'text/xml'
+                   }
+                 }
+               }, function () {
+                 return true;
+               });
              }
-
-             return this._isExteriorRing;
            }
-         }, {
-           key: "enclosingRing",
-           value: function enclosingRing() {
-             if (this._enclosingRing === undefined) {
-               this._enclosingRing = this._calcEnclosingRing();
+         },
+         // Load multiple users in chunks
+         // (note: callback may be called multiple times)
+         // GET /api/0.6/users?users=#id1,#id2,...,#idn
+         loadUsers: function loadUsers(uids, callback) {
+           var toLoad = [];
+           var cached = [];
+           utilArrayUniq(uids).forEach(function (uid) {
+             if (_userCache.user[uid]) {
+               delete _userCache.toLoad[uid];
+               cached.push(_userCache.user[uid]);
+             } else {
+               toLoad.push(uid);
              }
+           });
 
-             return this._enclosingRing;
+           if (cached.length || !this.authenticated()) {
+             callback(undefined, cached);
+             if (!this.authenticated()) return; // require auth
            }
-           /* Returns the ring that encloses this one, if any */
-
-         }, {
-           key: "_calcEnclosingRing",
-           value: function _calcEnclosingRing() {
-             // start with the ealier sweep line event so that the prevSeg
-             // chain doesn't lead us inside of a loop of ours
-             var leftMostEvt = this.events[0];
-
-             for (var i = 1, iMax = this.events.length; i < iMax; i++) {
-               var evt = this.events[i];
-               if (SweepEvent$1.compare(leftMostEvt, evt) > 0) leftMostEvt = evt;
-             }
 
-             var prevSeg = leftMostEvt.segment.prevInResult();
-             var prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
+           utilArrayChunk(toLoad, 150).forEach(function (arr) {
+             oauth.xhr({
+               method: 'GET',
+               path: '/api/0.6/users.json?users=' + arr.join()
+             }, wrapcb(this, done, _connectionID));
+           }.bind(this));
 
-             while (true) {
-               // no segment found, thus no ring can enclose us
-               if (!prevSeg) return null; // no segments below prev segment found, thus the ring of the prev
-               // segment must loop back around and enclose us
+           function done(err, payload) {
+             if (err) return callback(err);
+             var options = {
+               skipSeen: true
+             };
+             return parseUserJSON(payload, function (err, results) {
+               if (err) return callback(err);
+               return callback(undefined, results);
+             }, options);
+           }
+         },
+         // Load a given user by id
+         // GET /api/0.6/user/#id
+         loadUser: function loadUser(uid, callback) {
+           if (_userCache.user[uid] || !this.authenticated()) {
+             // require auth
+             delete _userCache.toLoad[uid];
+             return callback(undefined, _userCache.user[uid]);
+           }
 
-               if (!prevPrevSeg) return prevSeg.ringOut; // if the two segments are of different rings, the ring of the prev
-               // segment must either loop around us or the ring of the prev prev
-               // seg, which would make us and the ring of the prev peers
+           oauth.xhr({
+             method: 'GET',
+             path: '/api/0.6/user/' + uid + '.json'
+           }, wrapcb(this, done, _connectionID));
 
-               if (prevPrevSeg.ringOut !== prevSeg.ringOut) {
-                 if (prevPrevSeg.ringOut.enclosingRing() !== prevSeg.ringOut) {
-                   return prevSeg.ringOut;
-                 } else return prevSeg.ringOut.enclosingRing();
-               } // two segments are from the same ring, so this was a penisula
-               // of that ring. iterate downward, keep searching
+           function done(err, payload) {
+             if (err) return callback(err);
+             var options = {
+               skipSeen: true
+             };
+             return parseUserJSON(payload, function (err, results) {
+               if (err) return callback(err);
+               return callback(undefined, results[0]);
+             }, options);
+           }
+         },
+         // Load the details of the logged-in user
+         // GET /api/0.6/user/details
+         userDetails: function userDetails(callback) {
+           if (_userDetails) {
+             // retrieve cached
+             return callback(undefined, _userDetails);
+           }
 
+           oauth.xhr({
+             method: 'GET',
+             path: '/api/0.6/user/details.json'
+           }, wrapcb(this, done, _connectionID));
 
-               prevSeg = prevPrevSeg.prevInResult();
-               prevPrevSeg = prevSeg ? prevSeg.prevInResult() : null;
-             }
+           function done(err, payload) {
+             if (err) return callback(err);
+             var options = {
+               skipSeen: false
+             };
+             return parseUserJSON(payload, function (err, results) {
+               if (err) return callback(err);
+               _userDetails = results[0];
+               return callback(undefined, _userDetails);
+             }, options);
+           }
+         },
+         // Load previous changesets for the logged in user
+         // GET /api/0.6/changesets?user=#id
+         userChangesets: function userChangesets(callback) {
+           if (_userChangesets) {
+             // retrieve cached
+             return callback(undefined, _userChangesets);
            }
-         }]);
-
-         return RingOut;
-       }();
 
-       var PolyOut = /*#__PURE__*/function () {
-         function PolyOut(exteriorRing) {
-           _classCallCheck$1(this, PolyOut);
+           this.userDetails(wrapcb(this, gotDetails, _connectionID));
 
-           this.exteriorRing = exteriorRing;
-           exteriorRing.poly = this;
-           this.interiorRings = [];
-         }
+           function gotDetails(err, user) {
+             if (err) {
+               return callback(err);
+             }
 
-         _createClass$1(PolyOut, [{
-           key: "addInterior",
-           value: function addInterior(ring) {
-             this.interiorRings.push(ring);
-             ring.poly = this;
+             oauth.xhr({
+               method: 'GET',
+               path: '/api/0.6/changesets?user=' + user.id
+             }, wrapcb(this, done, _connectionID));
            }
-         }, {
-           key: "getGeom",
-           value: function getGeom() {
-             var geom = [this.exteriorRing.getGeom()]; // exterior ring was all (within rounding error of angle calc) colinear points
 
-             if (geom[0] === null) return null;
-
-             for (var i = 0, iMax = this.interiorRings.length; i < iMax; i++) {
-               var ringGeom = this.interiorRings[i].getGeom(); // interior ring was all (within rounding error of angle calc) colinear points
-
-               if (ringGeom === null) continue;
-               geom.push(ringGeom);
+           function done(err, xml) {
+             if (err) {
+               return callback(err);
              }
 
-             return geom;
+             _userChangesets = Array.prototype.map.call(xml.getElementsByTagName('changeset'), function (changeset) {
+               return {
+                 tags: getTags(changeset)
+               };
+             }).filter(function (changeset) {
+               var comment = changeset.tags.comment;
+               return comment && comment !== '';
+             });
+             return callback(undefined, _userChangesets);
            }
-         }]);
-
-         return PolyOut;
-       }();
+         },
+         // Fetch the status of the OSM API
+         // GET /api/capabilities
+         status: function status(callback) {
+           var url = urlroot + '/api/capabilities';
+           var errback = wrapcb(this, done, _connectionID);
+           d3_xml(url).then(function (data) {
+             errback(null, data);
+           })["catch"](function (err) {
+             errback(err.message);
+           });
 
-       var MultiPolyOut = /*#__PURE__*/function () {
-         function MultiPolyOut(rings) {
-           _classCallCheck$1(this, MultiPolyOut);
+           function done(err, xml) {
+             if (err) {
+               // the status is null if no response could be retrieved
+               return callback(err, null);
+             } // update blocklists
 
-           this.rings = rings;
-           this.polys = this._composePolys(rings);
-         }
 
-         _createClass$1(MultiPolyOut, [{
-           key: "getGeom",
-           value: function getGeom() {
-             var geom = [];
+             var elements = xml.getElementsByTagName('blacklist');
+             var regexes = [];
 
-             for (var i = 0, iMax = this.polys.length; i < iMax; i++) {
-               var polyGeom = this.polys[i].getGeom(); // exterior ring was all (within rounding error of angle calc) colinear points
+             for (var i = 0; i < elements.length; i++) {
+               var regexString = elements[i].getAttribute('regex'); // needs unencode?
 
-               if (polyGeom === null) continue;
-               geom.push(polyGeom);
+               if (regexString) {
+                 try {
+                   var regex = new RegExp(regexString);
+                   regexes.push(regex);
+                 } catch (e) {
+                   /* noop */
+                 }
+               }
              }
 
-             return geom;
-           }
-         }, {
-           key: "_composePolys",
-           value: function _composePolys(rings) {
-             var polys = [];
-
-             for (var i = 0, iMax = rings.length; i < iMax; i++) {
-               var ring = rings[i];
-               if (ring.poly) continue;
-               if (ring.isExteriorRing()) polys.push(new PolyOut(ring));else {
-                 var enclosingRing = ring.enclosingRing();
-                 if (!enclosingRing.poly) polys.push(new PolyOut(enclosingRing));
-                 enclosingRing.poly.addInterior(ring);
-               }
+             if (regexes.length) {
+               _imageryBlocklists = regexes;
              }
 
-             return polys;
+             if (_rateLimitError) {
+               return callback(_rateLimitError, 'rateLimited');
+             } else {
+               var waynodes = xml.getElementsByTagName('waynodes');
+               var maxWayNodes = waynodes.length && parseInt(waynodes[0].getAttribute('maximum'), 10);
+               if (maxWayNodes && isFinite(maxWayNodes)) _maxWayNodes = maxWayNodes;
+               var apiStatus = xml.getElementsByTagName('status');
+               var val = apiStatus[0].getAttribute('api');
+               return callback(undefined, val);
+             }
+           }
+         },
+         // Calls `status` and dispatches an `apiStatusChange` event if the returned
+         // status differs from the cached status.
+         reloadApiStatus: function reloadApiStatus() {
+           // throttle to avoid unnecessary API calls
+           if (!this.throttledReloadApiStatus) {
+             var that = this;
+             this.throttledReloadApiStatus = throttle(function () {
+               that.status(function (err, status) {
+                 if (status !== _cachedApiStatus) {
+                   _cachedApiStatus = status;
+                   dispatch$2.call('apiStatusChange', that, err, status);
+                 }
+               });
+             }, 500);
            }
-         }]);
 
-         return MultiPolyOut;
-       }();
-       /**
-        * NOTE:  We must be careful not to change any segments while
-        *        they are in the SplayTree. AFAIK, there's no way to tell
-        *        the tree to rebalance itself - thus before splitting
-        *        a segment that's in the tree, we remove it from the tree,
-        *        do the split, then re-insert it. (Even though splitting a
-        *        segment *shouldn't* change its correct position in the
-        *        sweep line tree, the reality is because of rounding errors,
-        *        it sometimes does.)
-        */
+           this.throttledReloadApiStatus();
+         },
+         // Returns the maximum number of nodes a single way can have
+         maxWayNodes: function maxWayNodes() {
+           return _maxWayNodes;
+         },
+         // Load data (entities) from the API in tiles
+         // GET /api/0.6/map?bbox=
+         loadTiles: function loadTiles(projection, callback) {
+           if (_off) return; // determine the needed tiles to cover the view
 
+           var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-       var SweepLine = /*#__PURE__*/function () {
-         function SweepLine(queue) {
-           var comparator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : Segment.compare;
+           var hadRequests = hasInflightRequests(_tileCache);
+           abortUnwantedRequests(_tileCache, tiles);
+
+           if (hadRequests && !hasInflightRequests(_tileCache)) {
+             dispatch$2.call('loaded'); // stop the spinner
+           } // issue new requests..
 
-           _classCallCheck$1(this, SweepLine);
 
-           this.queue = queue;
-           this.tree = new Tree(comparator);
-           this.segments = [];
-         }
+           tiles.forEach(function (tile) {
+             this.loadTile(tile, callback);
+           }, this);
+         },
+         // Load a single data tile
+         // GET /api/0.6/map?bbox=
+         loadTile: function loadTile(tile, callback) {
+           if (_off) return;
+           if (_tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
 
-         _createClass$1(SweepLine, [{
-           key: "process",
-           value: function process(event) {
-             var segment = event.segment;
-             var newEvents = []; // if we've already been consumed by another segment,
-             // clean up our body parts and get out
+           if (!hasInflightRequests(_tileCache)) {
+             dispatch$2.call('loading'); // start the spinner
+           }
 
-             if (event.consumedBy) {
-               if (event.isLeft) this.queue.remove(event.otherSE);else this.tree.remove(segment);
-               return newEvents;
-             }
+           var path = '/api/0.6/map.json?bbox=';
+           var options = {
+             skipSeen: true
+           };
+           _tileCache.inflight[tile.id] = this.loadFromAPI(path + tile.extent.toParam(), tileCallback, options);
 
-             var node = event.isLeft ? this.tree.insert(segment) : this.tree.find(segment);
-             if (!node) throw new Error("Unable to find segment #".concat(segment.id, " ") + "[".concat(segment.leftSE.point.x, ", ").concat(segment.leftSE.point.y, "] -> ") + "[".concat(segment.rightSE.point.x, ", ").concat(segment.rightSE.point.y, "] ") + 'in SweepLine tree. Please submit a bug report.');
-             var prevNode = node;
-             var nextNode = node;
-             var prevSeg = undefined;
-             var nextSeg = undefined; // skip consumed segments still in tree
+           function tileCallback(err, parsed) {
+             delete _tileCache.inflight[tile.id];
 
-             while (prevSeg === undefined) {
-               prevNode = this.tree.prev(prevNode);
-               if (prevNode === null) prevSeg = null;else if (prevNode.key.consumedBy === undefined) prevSeg = prevNode.key;
-             } // skip consumed segments still in tree
+             if (!err) {
+               delete _tileCache.toLoad[tile.id];
+               _tileCache.loaded[tile.id] = true;
+               var bbox = tile.extent.bbox();
+               bbox.id = tile.id;
 
+               _tileCache.rtree.insert(bbox);
+             }
 
-             while (nextSeg === undefined) {
-               nextNode = this.tree.next(nextNode);
-               if (nextNode === null) nextSeg = null;else if (nextNode.key.consumedBy === undefined) nextSeg = nextNode.key;
+             if (callback) {
+               callback(err, Object.assign({
+                 data: parsed
+               }, tile));
              }
 
-             if (event.isLeft) {
-               // Check for intersections against the previous segment in the sweep line
-               var prevMySplitter = null;
+             if (!hasInflightRequests(_tileCache)) {
+               dispatch$2.call('loaded'); // stop the spinner
+             }
+           }
+         },
+         isDataLoaded: function isDataLoaded(loc) {
+           var bbox = {
+             minX: loc[0],
+             minY: loc[1],
+             maxX: loc[0],
+             maxY: loc[1]
+           };
+           return _tileCache.rtree.collides(bbox);
+         },
+         // load the tile that covers the given `loc`
+         loadTileAtLoc: function loadTileAtLoc(loc, callback) {
+           // Back off if the toLoad queue is filling up.. re #6417
+           // (Currently `loadTileAtLoc` requests are considered low priority - used by operations to
+           // let users safely edit geometries which extend to unloaded tiles.  We can drop some.)
+           if (Object.keys(_tileCache.toLoad).length > 50) return;
+           var k = geoZoomToScale(_tileZoom + 1);
+           var offset = geoRawMercator().scale(k)(loc);
+           var projection = geoRawMercator().transform({
+             k: k,
+             x: -offset[0],
+             y: -offset[1]
+           });
+           var tiles = tiler$2.zoomExtent([_tileZoom, _tileZoom]).getTiles(projection);
+           tiles.forEach(function (tile) {
+             if (_tileCache.toLoad[tile.id] || _tileCache.loaded[tile.id] || _tileCache.inflight[tile.id]) return;
+             _tileCache.toLoad[tile.id] = true;
+             this.loadTile(tile, callback);
+           }, this);
+         },
+         // Load notes from the API in tiles
+         // GET /api/0.6/notes?bbox=
+         loadNotes: function loadNotes(projection, noteOptions) {
+           noteOptions = Object.assign({
+             limit: 10000,
+             closed: 7
+           }, noteOptions);
+           if (_off) return;
+           var that = this;
+           var path = '/api/0.6/notes?limit=' + noteOptions.limit + '&closed=' + noteOptions.closed + '&bbox=';
 
-               if (prevSeg) {
-                 var prevInter = prevSeg.getIntersection(segment);
+           var throttleLoadUsers = throttle(function () {
+             var uids = Object.keys(_userCache.toLoad);
+             if (!uids.length) return;
+             that.loadUsers(uids, function () {}); // eagerly load user details
+           }, 750); // determine the needed tiles to cover the view
 
-                 if (prevInter !== null) {
-                   if (!segment.isAnEndpoint(prevInter)) prevMySplitter = prevInter;
 
-                   if (!prevSeg.isAnEndpoint(prevInter)) {
-                     var newEventsFromSplit = this._splitSafely(prevSeg, prevInter);
+           var tiles = tiler$2.zoomExtent([_noteZoom, _noteZoom]).getTiles(projection); // abort inflight requests that are no longer needed
 
-                     for (var i = 0, iMax = newEventsFromSplit.length; i < iMax; i++) {
-                       newEvents.push(newEventsFromSplit[i]);
-                     }
-                   }
-                 }
-               } // Check for intersections against the next segment in the sweep line
+           abortUnwantedRequests(_noteCache, tiles); // issue new requests..
 
+           tiles.forEach(function (tile) {
+             if (_noteCache.loaded[tile.id] || _noteCache.inflight[tile.id]) return;
+             var options = {
+               skipSeen: false
+             };
+             _noteCache.inflight[tile.id] = that.loadFromAPI(path + tile.extent.toParam(), function (err) {
+               delete _noteCache.inflight[tile.id];
 
-               var nextMySplitter = null;
+               if (!err) {
+                 _noteCache.loaded[tile.id] = true;
+               }
 
-               if (nextSeg) {
-                 var nextInter = nextSeg.getIntersection(segment);
+               throttleLoadUsers();
+               dispatch$2.call('loadedNotes');
+             }, options);
+           });
+         },
+         // Create a note
+         // POST /api/0.6/notes?params
+         postNoteCreate: function postNoteCreate(note, callback) {
+           if (!this.authenticated()) {
+             return callback({
+               message: 'Not Authenticated',
+               status: -3
+             }, note);
+           }
 
-                 if (nextInter !== null) {
-                   if (!segment.isAnEndpoint(nextInter)) nextMySplitter = nextInter;
+           if (_noteCache.inflightPost[note.id]) {
+             return callback({
+               message: 'Note update already inflight',
+               status: -2
+             }, note);
+           }
 
-                   if (!nextSeg.isAnEndpoint(nextInter)) {
-                     var _newEventsFromSplit = this._splitSafely(nextSeg, nextInter);
+           if (!note.loc[0] || !note.loc[1] || !note.newComment) return; // location & description required
 
-                     for (var _i = 0, _iMax = _newEventsFromSplit.length; _i < _iMax; _i++) {
-                       newEvents.push(_newEventsFromSplit[_i]);
-                     }
-                   }
-                 }
-               } // For simplicity, even if we find more than one intersection we only
-               // spilt on the 'earliest' (sweep-line style) of the intersections.
-               // The other intersection will be handled in a future process().
+           var comment = note.newComment;
 
+           if (note.newCategory && note.newCategory !== 'None') {
+             comment += ' #' + note.newCategory;
+           }
 
-               if (prevMySplitter !== null || nextMySplitter !== null) {
-                 var mySplitter = null;
-                 if (prevMySplitter === null) mySplitter = nextMySplitter;else if (nextMySplitter === null) mySplitter = prevMySplitter;else {
-                   var cmpSplitters = SweepEvent$1.comparePoints(prevMySplitter, nextMySplitter);
-                   mySplitter = cmpSplitters <= 0 ? prevMySplitter : nextMySplitter;
-                 } // Rounding errors can cause changes in ordering,
-                 // so remove afected segments and right sweep events before splitting
+           var path = '/api/0.6/notes?' + utilQsString({
+             lon: note.loc[0],
+             lat: note.loc[1],
+             text: comment
+           });
+           _noteCache.inflightPost[note.id] = oauth.xhr({
+             method: 'POST',
+             path: path
+           }, wrapcb(this, done, _connectionID));
 
-                 this.queue.remove(segment.rightSE);
-                 newEvents.push(segment.rightSE);
+           function done(err, xml) {
+             delete _noteCache.inflightPost[note.id];
 
-                 var _newEventsFromSplit2 = segment.split(mySplitter);
+             if (err) {
+               return callback(err);
+             } // we get the updated note back, remove from caches and reparse..
 
-                 for (var _i2 = 0, _iMax2 = _newEventsFromSplit2.length; _i2 < _iMax2; _i2++) {
-                   newEvents.push(_newEventsFromSplit2[_i2]);
-                 }
-               }
 
-               if (newEvents.length > 0) {
-                 // We found some intersections, so re-do the current event to
-                 // make sure sweep line ordering is totally consistent for later
-                 // use with the segment 'prev' pointers
-                 this.tree.remove(segment);
-                 newEvents.push(event);
+             this.removeNote(note);
+             var options = {
+               skipSeen: false
+             };
+             return parseXML(xml, function (err, results) {
+               if (err) {
+                 return callback(err);
                } else {
-                 // done with left event
-                 this.segments.push(segment);
-                 segment.prev = prevSeg;
+                 return callback(undefined, results[0]);
                }
-             } else {
-               // event.isRight
-               // since we're about to be removed from the sweep line, check for
-               // intersections between our previous and next segments
-               if (prevSeg && nextSeg) {
-                 var inter = prevSeg.getIntersection(nextSeg);
-
-                 if (inter !== null) {
-                   if (!prevSeg.isAnEndpoint(inter)) {
-                     var _newEventsFromSplit3 = this._splitSafely(prevSeg, inter);
-
-                     for (var _i3 = 0, _iMax3 = _newEventsFromSplit3.length; _i3 < _iMax3; _i3++) {
-                       newEvents.push(_newEventsFromSplit3[_i3]);
-                     }
-                   }
-
-                   if (!nextSeg.isAnEndpoint(inter)) {
-                     var _newEventsFromSplit4 = this._splitSafely(nextSeg, inter);
+             }, options);
+           }
+         },
+         // Update a note
+         // POST /api/0.6/notes/#id/comment?text=comment
+         // POST /api/0.6/notes/#id/close?text=comment
+         // POST /api/0.6/notes/#id/reopen?text=comment
+         postNoteUpdate: function postNoteUpdate(note, newStatus, callback) {
+           if (!this.authenticated()) {
+             return callback({
+               message: 'Not Authenticated',
+               status: -3
+             }, note);
+           }
 
-                     for (var _i4 = 0, _iMax4 = _newEventsFromSplit4.length; _i4 < _iMax4; _i4++) {
-                       newEvents.push(_newEventsFromSplit4[_i4]);
-                     }
-                   }
-                 }
-               }
+           if (_noteCache.inflightPost[note.id]) {
+             return callback({
+               message: 'Note update already inflight',
+               status: -2
+             }, note);
+           }
 
-               this.tree.remove(segment);
-             }
+           var action;
 
-             return newEvents;
+           if (note.status !== 'closed' && newStatus === 'closed') {
+             action = 'close';
+           } else if (note.status !== 'open' && newStatus === 'open') {
+             action = 'reopen';
+           } else {
+             action = 'comment';
+             if (!note.newComment) return; // when commenting, comment required
            }
-           /* Safely split a segment that is currently in the datastructures
-            * IE - a segment other than the one that is currently being processed. */
 
-         }, {
-           key: "_splitSafely",
-           value: function _splitSafely(seg, pt) {
-             // Rounding errors can cause changes in ordering,
-             // so remove afected segments and right sweep events before splitting
-             // removeNode() doesn't work, so have re-find the seg
-             // https://github.com/w8r/splay-tree/pull/5
-             this.tree.remove(seg);
-             var rightSE = seg.rightSE;
-             this.queue.remove(rightSE);
-             var newEvents = seg.split(pt);
-             newEvents.push(rightSE); // splitting can trigger consumption
+           var path = '/api/0.6/notes/' + note.id + '/' + action;
 
-             if (seg.consumedBy === undefined) this.tree.insert(seg);
-             return newEvents;
+           if (note.newComment) {
+             path += '?' + utilQsString({
+               text: note.newComment
+             });
            }
-         }]);
 
-         return SweepLine;
-       }();
+           _noteCache.inflightPost[note.id] = oauth.xhr({
+             method: 'POST',
+             path: path
+           }, wrapcb(this, done, _connectionID));
 
-       var POLYGON_CLIPPING_MAX_QUEUE_SIZE = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_QUEUE_SIZE || 1000000;
-       var POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS = typeof process !== 'undefined' && process.env.POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS || 1000000;
+           function done(err, xml) {
+             delete _noteCache.inflightPost[note.id];
 
-       var Operation = /*#__PURE__*/function () {
-         function Operation() {
-           _classCallCheck$1(this, Operation);
-         }
+             if (err) {
+               return callback(err);
+             } // we get the updated note back, remove from caches and reparse..
 
-         _createClass$1(Operation, [{
-           key: "run",
-           value: function run(type, geom, moreGeoms) {
-             operation.type = type;
-             rounder.reset();
-             /* Convert inputs to MultiPoly objects */
 
-             var multipolys = [new MultiPolyIn(geom, true)];
+             this.removeNote(note); // update closed note cache - used to populate `closed:note` changeset tag
 
-             for (var i = 0, iMax = moreGeoms.length; i < iMax; i++) {
-               multipolys.push(new MultiPolyIn(moreGeoms[i], false));
+             if (action === 'close') {
+               _noteCache.closed[note.id] = true;
+             } else if (action === 'reopen') {
+               delete _noteCache.closed[note.id];
              }
 
-             operation.numMultiPolys = multipolys.length;
-             /* BBox optimization for difference operation
-              * If the bbox of a multipolygon that's part of the clipping doesn't
-              * intersect the bbox of the subject at all, we can just drop that
-              * multiploygon. */
-
-             if (operation.type === 'difference') {
-               // in place removal
-               var subject = multipolys[0];
-               var _i = 1;
+             var options = {
+               skipSeen: false
+             };
+             return parseXML(xml, function (err, results) {
+               if (err) {
+                 return callback(err);
+               } else {
+                 return callback(undefined, results[0]);
+               }
+             }, options);
+           }
+         },
+         "switch": function _switch(options) {
+           urlroot = options.urlroot;
+           oauth.options(Object.assign({
+             url: urlroot,
+             loading: authLoading,
+             done: authDone
+           }, options));
+           this.reset();
+           this.userChangesets(function () {}); // eagerly load user details/changesets
 
-               while (_i < multipolys.length) {
-                 if (getBboxOverlap(multipolys[_i].bbox, subject.bbox) !== null) _i++;else multipolys.splice(_i, 1);
+           dispatch$2.call('change');
+           return this;
+         },
+         toggle: function toggle(val) {
+           _off = !val;
+           return this;
+         },
+         isChangesetInflight: function isChangesetInflight() {
+           return !!_changeset.inflight;
+         },
+         // get/set cached data
+         // This is used to save/restore the state when entering/exiting the walkthrough
+         // Also used for testing purposes.
+         caches: function caches(obj) {
+           function cloneCache(source) {
+             var target = {};
+             Object.keys(source).forEach(function (k) {
+               if (k === 'rtree') {
+                 target.rtree = new RBush().fromJSON(source.rtree.toJSON()); // clone rbush
+               } else if (k === 'note') {
+                 target.note = {};
+                 Object.keys(source.note).forEach(function (id) {
+                   target.note[id] = osmNote(source.note[id]); // copy notes
+                 });
+               } else {
+                 target[k] = JSON.parse(JSON.stringify(source[k])); // clone deep
                }
-             }
-             /* BBox optimization for intersection operation
-              * If we can find any pair of multipolygons whose bbox does not overlap,
-              * then the result will be empty. */
+             });
+             return target;
+           }
 
+           if (!arguments.length) {
+             return {
+               tile: cloneCache(_tileCache),
+               note: cloneCache(_noteCache),
+               user: cloneCache(_userCache)
+             };
+           } // access caches directly for testing (e.g., loading notes rtree)
 
-             if (operation.type === 'intersection') {
-               // TODO: this is O(n^2) in number of polygons. By sorting the bboxes,
-               //       it could be optimized to O(n * ln(n))
-               for (var _i2 = 0, _iMax = multipolys.length; _i2 < _iMax; _i2++) {
-                 var mpA = multipolys[_i2];
 
-                 for (var j = _i2 + 1, jMax = multipolys.length; j < jMax; j++) {
-                   if (getBboxOverlap(mpA.bbox, multipolys[j].bbox) === null) return [];
-                 }
-               }
-             }
-             /* Put segment endpoints in a priority queue */
+           if (obj === 'get') {
+             return {
+               tile: _tileCache,
+               note: _noteCache,
+               user: _userCache
+             };
+           }
 
+           if (obj.tile) {
+             _tileCache = obj.tile;
+             _tileCache.inflight = {};
+           }
 
-             var queue = new Tree(SweepEvent$1.compare);
+           if (obj.note) {
+             _noteCache = obj.note;
+             _noteCache.inflight = {};
+             _noteCache.inflightPost = {};
+           }
 
-             for (var _i3 = 0, _iMax2 = multipolys.length; _i3 < _iMax2; _i3++) {
-               var sweepEvents = multipolys[_i3].getSweepEvents();
+           if (obj.user) {
+             _userCache = obj.user;
+           }
 
-               for (var _j = 0, _jMax = sweepEvents.length; _j < _jMax; _j++) {
-                 queue.insert(sweepEvents[_j]);
+           return this;
+         },
+         logout: function logout() {
+           _userChangesets = undefined;
+           _userDetails = undefined;
+           oauth.logout();
+           dispatch$2.call('change');
+           return this;
+         },
+         authenticated: function authenticated() {
+           return oauth.authenticated();
+         },
+         authenticate: function authenticate(callback) {
+           var that = this;
+           var cid = _connectionID;
+           _userChangesets = undefined;
+           _userDetails = undefined;
 
-                 if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
-                   // prevents an infinite loop, an otherwise common manifestation of bugs
-                   throw new Error('Infinite loop when putting segment endpoints in a priority queue ' + '(queue size too big). Please file a bug report.');
-                 }
-               }
+           function done(err, res) {
+             if (err) {
+               if (callback) callback(err);
+               return;
              }
-             /* Pass the sweep line over those endpoints */
 
+             if (that.getConnectionId() !== cid) {
+               if (callback) callback({
+                 message: 'Connection Switched',
+                 status: -1
+               });
+               return;
+             }
 
-             var sweepLine = new SweepLine(queue);
-             var prevQueueSize = queue.size;
-             var node = queue.pop();
-
-             while (node) {
-               var evt = node.key;
+             _rateLimitError = undefined;
+             dispatch$2.call('change');
+             if (callback) callback(err, res);
+             that.userChangesets(function () {}); // eagerly load user details/changesets
+           }
 
-               if (queue.size === prevQueueSize) {
-                 // prevents an infinite loop, an otherwise common manifestation of bugs
-                 var seg = evt.segment;
-                 throw new Error("Unable to pop() ".concat(evt.isLeft ? 'left' : 'right', " SweepEvent ") + "[".concat(evt.point.x, ", ").concat(evt.point.y, "] from segment #").concat(seg.id, " ") + "[".concat(seg.leftSE.point.x, ", ").concat(seg.leftSE.point.y, "] -> ") + "[".concat(seg.rightSE.point.x, ", ").concat(seg.rightSE.point.y, "] from queue. ") + 'Please file a bug report.');
-               }
+           return oauth.authenticate(done);
+         },
+         imageryBlocklists: function imageryBlocklists() {
+           return _imageryBlocklists;
+         },
+         tileZoom: function tileZoom(val) {
+           if (!arguments.length) return _tileZoom;
+           _tileZoom = val;
+           return this;
+         },
+         // get all cached notes covering the viewport
+         notes: function notes(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           return _noteCache.rtree.search(bbox).map(function (d) {
+             return d.data;
+           });
+         },
+         // get a single note from the cache
+         getNote: function getNote(id) {
+           return _noteCache.note[id];
+         },
+         // remove a single note from the cache
+         removeNote: function removeNote(note) {
+           if (!(note instanceof osmNote) || !note.id) return;
+           delete _noteCache.note[note.id];
+           updateRtree(encodeNoteRtree(note), false); // false = remove
+         },
+         // replace a single note in the cache
+         replaceNote: function replaceNote(note) {
+           if (!(note instanceof osmNote) || !note.id) return;
+           _noteCache.note[note.id] = note;
+           updateRtree(encodeNoteRtree(note), true); // true = replace
 
-               if (queue.size > POLYGON_CLIPPING_MAX_QUEUE_SIZE) {
-                 // prevents an infinite loop, an otherwise common manifestation of bugs
-                 throw new Error('Infinite loop when passing sweep line over endpoints ' + '(queue size too big). Please file a bug report.');
-               }
+           return note;
+         },
+         // Get an array of note IDs closed during this session.
+         // Used to populate `closed:note` changeset tag
+         getClosedIDs: function getClosedIDs() {
+           return Object.keys(_noteCache.closed).sort();
+         }
+       };
 
-               if (sweepLine.segments.length > POLYGON_CLIPPING_MAX_SWEEPLINE_SEGMENTS) {
-                 // prevents an infinite loop, an otherwise common manifestation of bugs
-                 throw new Error('Infinite loop when passing sweep line over endpoints ' + '(too many sweep line segments). Please file a bug report.');
-               }
+       var _apibase$1 = 'https://wiki.openstreetmap.org/w/api.php';
+       var _inflight$1 = {};
+       var _wikibaseCache = {};
+       var _localeIDs = {
+         en: false
+       };
 
-               var newEvents = sweepLine.process(evt);
+       var debouncedRequest$1 = debounce(request$1, 500, {
+         leading: false
+       });
 
-               for (var _i4 = 0, _iMax3 = newEvents.length; _i4 < _iMax3; _i4++) {
-                 var _evt = newEvents[_i4];
-                 if (_evt.consumedBy === undefined) queue.insert(_evt);
-               }
+       function request$1(url, callback) {
+         if (_inflight$1[url]) return;
+         var controller = new AbortController();
+         _inflight$1[url] = controller;
+         d3_json(url, {
+           signal: controller.signal
+         }).then(function (result) {
+           delete _inflight$1[url];
+           if (callback) callback(null, result);
+         })["catch"](function (err) {
+           delete _inflight$1[url];
+           if (err.name === 'AbortError') return;
+           if (callback) callback(err.message);
+         });
+       }
 
-               prevQueueSize = queue.size;
-               node = queue.pop();
-             } // free some memory we don't need anymore
+       var serviceOsmWikibase = {
+         init: function init() {
+           _inflight$1 = {};
+           _wikibaseCache = {};
+           _localeIDs = {};
+         },
+         reset: function reset() {
+           Object.values(_inflight$1).forEach(function (controller) {
+             controller.abort();
+           });
+           _inflight$1 = {};
+         },
 
+         /**
+          * Get the best value for the property, or undefined if not found
+          * @param entity object from wikibase
+          * @param property string e.g. 'P4' for image
+          * @param langCode string e.g. 'fr' for French
+          */
+         claimToValue: function claimToValue(entity, property, langCode) {
+           if (!entity.claims[property]) return undefined;
+           var locale = _localeIDs[langCode];
+           var preferredPick, localePick;
+           entity.claims[property].forEach(function (stmt) {
+             // If exists, use value limited to the needed language (has a qualifier P26 = locale)
+             // Or if not found, use the first value with the "preferred" rank
+             if (!preferredPick && stmt.rank === 'preferred') {
+               preferredPick = stmt;
+             }
 
-             rounder.reset();
-             /* Collect and compile segments we're keeping into a multipolygon */
+             if (locale && stmt.qualifiers && stmt.qualifiers.P26 && stmt.qualifiers.P26[0].datavalue.value.id === locale) {
+               localePick = stmt;
+             }
+           });
+           var result = localePick || preferredPick;
 
-             var ringsOut = RingOut.factory(sweepLine.segments);
-             var result = new MultiPolyOut(ringsOut);
-             return result.getGeom();
+           if (result) {
+             var datavalue = result.mainsnak.datavalue;
+             return datavalue.type === 'wikibase-entityid' ? datavalue.value.id : datavalue.value;
+           } else {
+             return undefined;
            }
-         }]);
-
-         return Operation;
-       }(); // singleton available by import
-
-
-       var operation = new Operation();
+         },
 
-       var union$1 = function union(geom) {
-         for (var _len = arguments.length, moreGeoms = new Array(_len > 1 ? _len - 1 : 0), _key = 1; _key < _len; _key++) {
-           moreGeoms[_key - 1] = arguments[_key];
-         }
+         /**
+          * Convert monolingual property into a key-value object (language -> value)
+          * @param entity object from wikibase
+          * @param property string e.g. 'P31' for monolingual wiki page title
+          */
+         monolingualClaimToValueObj: function monolingualClaimToValueObj(entity, property) {
+           if (!entity || !entity.claims[property]) return undefined;
+           return entity.claims[property].reduce(function (acc, obj) {
+             var value = obj.mainsnak.datavalue.value;
+             acc[value.language] = value.text;
+             return acc;
+           }, {});
+         },
+         toSitelink: function toSitelink(key, value) {
+           var result = value ? 'Tag:' + key + '=' + value : 'Key:' + key;
+           return result.replace(/_/g, ' ').trim();
+         },
+         //
+         // Pass params object of the form:
+         // {
+         //   key: 'string',
+         //   value: 'string',
+         //   langCode: 'string'
+         // }
+         //
+         getEntity: function getEntity(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest$1 : request$1;
+           var that = this;
+           var titles = [];
+           var result = {};
+           var rtypeSitelink = params.key === 'type' && params.value ? ('Relation:' + params.value).replace(/_/g, ' ').trim() : false;
+           var keySitelink = params.key ? this.toSitelink(params.key) : false;
+           var tagSitelink = params.key && params.value ? this.toSitelink(params.key, params.value) : false;
+           var localeSitelink;
 
-         return operation.run('union', geom, moreGeoms);
-       };
+           if (params.langCodes) {
+             params.langCodes.forEach(function (langCode) {
+               if (_localeIDs[langCode] === undefined) {
+                 // If this is the first time we are asking about this locale,
+                 // fetch corresponding entity (if it exists), and cache it.
+                 // If there is no such entry, cache `false` value to avoid re-requesting it.
+                 localeSitelink = ('Locale:' + langCode).replace(/_/g, ' ').trim();
+                 titles.push(localeSitelink);
+               }
+             });
+           }
 
-       var intersection$1$1 = function intersection(geom) {
-         for (var _len2 = arguments.length, moreGeoms = new Array(_len2 > 1 ? _len2 - 1 : 0), _key2 = 1; _key2 < _len2; _key2++) {
-           moreGeoms[_key2 - 1] = arguments[_key2];
-         }
+           if (rtypeSitelink) {
+             if (_wikibaseCache[rtypeSitelink]) {
+               result.rtype = _wikibaseCache[rtypeSitelink];
+             } else {
+               titles.push(rtypeSitelink);
+             }
+           }
 
-         return operation.run('intersection', geom, moreGeoms);
-       };
+           if (keySitelink) {
+             if (_wikibaseCache[keySitelink]) {
+               result.key = _wikibaseCache[keySitelink];
+             } else {
+               titles.push(keySitelink);
+             }
+           }
 
-       var xor = function xor(geom) {
-         for (var _len3 = arguments.length, moreGeoms = new Array(_len3 > 1 ? _len3 - 1 : 0), _key3 = 1; _key3 < _len3; _key3++) {
-           moreGeoms[_key3 - 1] = arguments[_key3];
-         }
+           if (tagSitelink) {
+             if (_wikibaseCache[tagSitelink]) {
+               result.tag = _wikibaseCache[tagSitelink];
+             } else {
+               titles.push(tagSitelink);
+             }
+           }
 
-         return operation.run('xor', geom, moreGeoms);
-       };
+           if (!titles.length) {
+             // Nothing to do, we already had everything in the cache
+             return callback(null, result);
+           } // Requesting just the user language code
+           // If backend recognizes the code, it will perform proper fallbacks,
+           // and the result will contain the requested code. If not, all values are returned:
+           // {"zh-tw":{"value":"...","language":"zh-tw","source-language":"zh-hant"}
+           // {"pt-br":{"value":"...","language":"pt","for-language":"pt-br"}}
 
-       var difference = function difference(subjectGeom) {
-         for (var _len4 = arguments.length, clippingGeoms = new Array(_len4 > 1 ? _len4 - 1 : 0), _key4 = 1; _key4 < _len4; _key4++) {
-           clippingGeoms[_key4 - 1] = arguments[_key4];
-         }
 
-         return operation.run('difference', subjectGeom, clippingGeoms);
-       };
+           var obj = {
+             action: 'wbgetentities',
+             sites: 'wiki',
+             titles: titles.join('|'),
+             languages: params.langCodes.join('|'),
+             languagefallback: 1,
+             origin: '*',
+             format: 'json' // There is an MW Wikibase API bug https://phabricator.wikimedia.org/T212069
+             // We shouldn't use v1 until it gets fixed, but should switch to it afterwards
+             // formatversion: 2,
 
-       var index$1 = {
-         union: union$1,
-         intersection: intersection$1$1,
-         xor: xor,
-         difference: difference
-       };
+           };
+           var url = _apibase$1 + '?' + utilQsString(obj);
+           doRequest(url, function (err, d) {
+             if (err) {
+               callback(err);
+             } else if (!d.success || d.error) {
+               callback(d.error.messages.map(function (v) {
+                 return v.html['*'];
+               }).join('<br>'));
+             } else {
+               var localeID = false;
+               Object.values(d.entities).forEach(function (res) {
+                 if (res.missing !== '') {
+                   var title = res.sitelinks.wiki.title;
 
-       var geojsonPrecision = createCommonjsModule(function (module) {
-         (function () {
-           function parse(t, coordinatePrecision, extrasPrecision) {
-             function point(p) {
-               return p.map(function (e, index) {
-                 if (index < 2) {
-                   return 1 * e.toFixed(coordinatePrecision);
-                 } else {
-                   return 1 * e.toFixed(extrasPrecision);
+                   if (title === rtypeSitelink) {
+                     _wikibaseCache[rtypeSitelink] = res;
+                     result.rtype = res;
+                   } else if (title === keySitelink) {
+                     _wikibaseCache[keySitelink] = res;
+                     result.key = res;
+                   } else if (title === tagSitelink) {
+                     _wikibaseCache[tagSitelink] = res;
+                     result.tag = res;
+                   } else if (title === localeSitelink) {
+                     localeID = res.id;
+                   } else {
+                     console.log('Unexpected title ' + title); // eslint-disable-line no-console
+                   }
                  }
                });
-             }
 
-             function multi(l) {
-               return l.map(point);
-             }
+               if (localeSitelink) {
+                 // If locale ID is not found, store false to prevent repeated queries
+                 that.addLocale(params.langCodes[0], localeID);
+               }
 
-             function poly(p) {
-               return p.map(multi);
+               callback(null, result);
              }
-
-             function multiPoly(m) {
-               return m.map(poly);
+           });
+         },
+         //
+         // Pass params object of the form:
+         // {
+         //   key: 'string',     // required
+         //   value: 'string'    // optional
+         // }
+         //
+         // Get an result object used to display tag documentation
+         // {
+         //   title:        'string',
+         //   description:  'string',
+         //   editURL:      'string',
+         //   imageURL:     'string',
+         //   wiki:         { title: 'string', text: 'string', url: 'string' }
+         // }
+         //
+         getDocs: function getDocs(params, callback) {
+           var that = this;
+           var langCodes = _mainLocalizer.localeCodes().map(function (code) {
+             return code.toLowerCase();
+           });
+           params.langCodes = langCodes;
+           this.getEntity(params, function (err, data) {
+             if (err) {
+               callback(err);
+               return;
              }
 
-             function geometry(obj) {
-               if (!obj) {
-                 return {};
-               }
-
-               switch (obj.type) {
-                 case "Point":
-                   obj.coordinates = point(obj.coordinates);
-                   return obj;
-
-                 case "LineString":
-                 case "MultiPoint":
-                   obj.coordinates = multi(obj.coordinates);
-                   return obj;
+             var entity = data.rtype || data.tag || data.key;
 
-                 case "Polygon":
-                 case "MultiLineString":
-                   obj.coordinates = poly(obj.coordinates);
-                   return obj;
+             if (!entity) {
+               callback('No entity');
+               return;
+             }
 
-                 case "MultiPolygon":
-                   obj.coordinates = multiPoly(obj.coordinates);
-                   return obj;
+             var i;
+             var description;
 
-                 case "GeometryCollection":
-                   obj.geometries = obj.geometries.map(geometry);
-                   return obj;
+             for (i in langCodes) {
+               var _code = langCodes[i];
 
-                 default:
-                   return {};
+               if (entity.descriptions[_code] && entity.descriptions[_code].language === _code) {
+                 description = entity.descriptions[_code];
+                 break;
                }
              }
 
-             function feature(obj) {
-               obj.geometry = geometry(obj.geometry);
-               return obj;
-             }
-
-             function featureCollection(f) {
-               f.features = f.features.map(feature);
-               return f;
-             }
+             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-             function geometryCollection(g) {
-               g.geometries = g.geometries.map(geometry);
-               return g;
-             }
+             var result = {
+               title: entity.title,
+               description: description ? description.value : '',
+               descriptionLocaleCode: description ? description.language : '',
+               editURL: 'https://wiki.openstreetmap.org/wiki/' + entity.title
+             }; // add image
 
-             if (!t) {
-               return t;
-             }
+             if (entity.claims) {
+               var imageroot;
+               var image = that.claimToValue(entity, 'P4', langCodes[0]);
 
-             switch (t.type) {
-               case "Feature":
-                 return feature(t);
+               if (image) {
+                 imageroot = 'https://commons.wikimedia.org/w/index.php';
+               } else {
+                 image = that.claimToValue(entity, 'P28', langCodes[0]);
 
-               case "GeometryCollection":
-                 return geometryCollection(t);
+                 if (image) {
+                   imageroot = 'https://wiki.openstreetmap.org/w/index.php';
+                 }
+               }
 
-               case "FeatureCollection":
-                 return featureCollection(t);
+               if (imageroot && image) {
+                 result.imageURL = imageroot + '?' + utilQsString({
+                   title: 'Special:Redirect/file/' + image,
+                   width: 400
+                 });
+               }
+             } // Try to get a wiki page from tag data item first, followed by the corresponding key data item.
+             // If neither tag nor key data item contain a wiki page in the needed language nor English,
+             // get the first found wiki page from either the tag or the key item.
 
-               case "Point":
-               case "LineString":
-               case "Polygon":
-               case "MultiPoint":
-               case "MultiPolygon":
-               case "MultiLineString":
-                 return geometry(t);
 
-               default:
-                 return t;
-             }
-           }
+             var rtypeWiki = that.monolingualClaimToValueObj(data.rtype, 'P31');
+             var tagWiki = that.monolingualClaimToValueObj(data.tag, 'P31');
+             var keyWiki = that.monolingualClaimToValueObj(data.key, 'P31');
+             var wikis = [rtypeWiki, tagWiki, keyWiki];
 
-           module.exports = parse;
-           module.exports.parse = parse;
-         })();
-       });
+             for (i in wikis) {
+               var wiki = wikis[i];
 
-       function isObject$4(obj) {
-         return _typeof(obj) === 'object' && obj !== null;
-       }
+               for (var j in langCodes) {
+                 var code = langCodes[j];
+                 var referenceId = langCodes[0].split('-')[0] !== 'en' && code.split('-')[0] === 'en' ? 'inspector.wiki_en_reference' : 'inspector.wiki_reference';
+                 var info = getWikiInfo(wiki, code, referenceId);
 
-       function forEach(obj, cb) {
-         if (Array.isArray(obj)) {
-           obj.forEach(cb);
-         } else if (isObject$4(obj)) {
-           Object.keys(obj).forEach(function (key) {
-             var val = obj[key];
-             cb(val, key);
-           });
-         }
-       }
+                 if (info) {
+                   result.wiki = info;
+                   break;
+                 }
+               }
 
-       function getTreeDepth(obj) {
-         var depth = 0;
+               if (result.wiki) break;
+             }
 
-         if (Array.isArray(obj) || isObject$4(obj)) {
-           forEach(obj, function (val) {
-             if (Array.isArray(val) || isObject$4(val)) {
-               var tmpDepth = getTreeDepth(val);
+             callback(null, result); // Helper method to get wiki info if a given language exists
 
-               if (tmpDepth > depth) {
-                 depth = tmpDepth;
+             function getWikiInfo(wiki, langCode, tKey) {
+               if (wiki && wiki[langCode]) {
+                 return {
+                   title: wiki[langCode],
+                   text: tKey,
+                   url: 'https://wiki.openstreetmap.org/wiki/' + wiki[langCode]
+                 };
                }
              }
            });
-           return depth + 1;
+         },
+         addLocale: function addLocale(langCode, qid) {
+           // Makes it easier to unit test
+           _localeIDs[langCode] = qid;
+         },
+         apibase: function apibase(val) {
+           if (!arguments.length) return _apibase$1;
+           _apibase$1 = val;
+           return this;
          }
+       };
 
-         return depth;
-       }
+       var jsonpCache = {};
+       window.jsonpCache = jsonpCache;
+       function jsonpRequest(url, callback) {
+         var request = {
+           abort: function abort() {}
+         };
 
-       function stringify(obj, options) {
-         options = options || {};
-         var indent = JSON.stringify([1], null, get$5(options, 'indent', 2)).slice(2, -3);
-         var addMargin = get$5(options, 'margins', false);
-         var addArrayMargin = get$5(options, 'arrayMargins', false);
-         var addObjectMargin = get$5(options, 'objectMargins', false);
-         var maxLength = indent === '' ? Infinity : get$5(options, 'maxLength', 80);
-         var maxNesting = get$5(options, 'maxNesting', Infinity);
-         return function _stringify(obj, currentIndent, reserved) {
-           if (obj && typeof obj.toJSON === 'function') {
-             obj = obj.toJSON();
+         if (window.JSONP_FIX) {
+           if (window.JSONP_DELAY === 0) {
+             callback(window.JSONP_FIX);
+           } else {
+             var t = window.setTimeout(function () {
+               callback(window.JSONP_FIX);
+             }, window.JSONP_DELAY || 0);
+
+             request.abort = function () {
+               window.clearTimeout(t);
+             };
            }
 
-           var string = JSON.stringify(obj);
+           return request;
+         }
 
-           if (string === undefined) {
-             return string;
+         function rand() {
+           var chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz';
+           var c = '';
+           var i = -1;
+
+           while (++i < 15) {
+             c += chars.charAt(Math.floor(Math.random() * 52));
            }
 
-           var length = maxLength - currentIndent.length - reserved;
-           var treeDepth = getTreeDepth(obj);
+           return c;
+         }
 
-           if (treeDepth <= maxNesting && string.length <= length) {
-             var prettified = prettify(string, {
-               addMargin: addMargin,
-               addArrayMargin: addArrayMargin,
-               addObjectMargin: addObjectMargin
-             });
+         function create(url) {
+           var e = url.match(/callback=(\w+)/);
+           var c = e ? e[1] : rand();
 
-             if (prettified.length <= length) {
-               return prettified;
+           jsonpCache[c] = function (data) {
+             if (jsonpCache[c]) {
+               callback(data);
              }
-           }
-
-           if (isObject$4(obj)) {
-             var nextIndent = currentIndent + indent;
-             var items = [];
-             var delimiters;
 
-             var comma = function comma(array, index) {
-               return index === array.length - 1 ? 0 : 1;
-             };
+             finalize();
+           };
 
-             if (Array.isArray(obj)) {
-               for (var index = 0; index < obj.length; index++) {
-                 items.push(_stringify(obj[index], nextIndent, comma(obj, index)) || 'null');
-               }
+           function finalize() {
+             delete jsonpCache[c];
+             script.remove();
+           }
 
-               delimiters = '[]';
-             } else {
-               Object.keys(obj).forEach(function (key, index, array) {
-                 var keyPart = JSON.stringify(key) + ': ';
+           request.abort = finalize;
+           return 'jsonpCache.' + c;
+         }
 
-                 var value = _stringify(obj[key], nextIndent, keyPart.length + comma(array, index));
+         var cb = create(url);
+         var script = select('head').append('script').attr('type', 'text/javascript').attr('src', url.replace(/(\{|%7B)callback(\}|%7D)/, cb));
+         return request;
+       }
 
-                 if (value !== undefined) {
-                   items.push(keyPart + value);
-                 }
-               });
-               delimiters = '{}';
-             }
+       var bubbleApi = 'https://dev.virtualearth.net/mapcontrol/HumanScaleServices/GetBubbles.ashx?';
+       var streetsideImagesApi = 'https://t.ssl.ak.tiles.virtualearth.net/tiles/';
+       var bubbleAppKey = 'AuftgJsO0Xs8Ts4M1xZUQJQXJNsvmh3IV8DkNieCiy3tCwCUMq76-WpkrBtNAuEm';
+       var pannellumViewerCSS = 'pannellum-streetside/pannellum.css';
+       var pannellumViewerJS = 'pannellum-streetside/pannellum.js';
+       var maxResults = 2000;
+       var tileZoom = 16.5;
+       var tiler$1 = utilTiler().zoomExtent([tileZoom, tileZoom]).skipNullIsland(true);
+       var dispatch$1 = dispatch$8('loadedImages', 'viewerChanged');
+       var minHfov = 10; // zoom in degrees:  20, 10, 5
 
-             if (items.length > 0) {
-               return [delimiters[0], indent + items.join(',\n' + nextIndent), delimiters[1]].join('\n' + currentIndent);
-             }
-           }
+       var maxHfov = 90; // zoom out degrees
 
-           return string;
-         }(obj, '', 0);
-       } // Note: This regex matches even invalid JSON strings, but since we’re
-       // working on the output of `JSON.stringify` we know that only valid strings
-       // are present (unless the user supplied a weird `options.indent` but in
-       // that case we don’t care since the output would be invalid anyway).
+       var defaultHfov = 45;
+       var _hires = false;
+       var _resolution = 512; // higher numbers are slower - 512, 1024, 2048, 4096
 
+       var _currScene = 0;
 
-       var stringOrChar = /("(?:[^\\"]|\\.)*")|[:,\][}{]/g;
+       var _ssCache;
 
-       function prettify(string, options) {
-         options = options || {};
-         var tokens = {
-           '{': '{',
-           '}': '}',
-           '[': '[',
-           ']': ']',
-           ',': ', ',
-           ':': ': '
-         };
+       var _pannellumViewer;
 
-         if (options.addMargin || options.addObjectMargin) {
-           tokens['{'] = '{ ';
-           tokens['}'] = ' }';
-         }
+       var _sceneOptions = {
+         showFullscreenCtrl: false,
+         autoLoad: true,
+         compass: true,
+         yaw: 0,
+         minHfov: minHfov,
+         maxHfov: maxHfov,
+         hfov: defaultHfov,
+         type: 'cubemap',
+         cubeMap: []
+       };
 
-         if (options.addMargin || options.addArrayMargin) {
-           tokens['['] = '[ ';
-           tokens[']'] = ' ]';
-         }
+       var _loadViewerPromise;
+       /**
+        * abortRequest().
+        */
 
-         return string.replace(stringOrChar, function (match, string) {
-           return string ? match : tokens[match];
-         });
-       }
 
-       function get$5(options, name, defaultValue) {
-         return name in options ? options[name] : defaultValue;
+       function abortRequest$1(i) {
+         i.abort();
        }
+       /**
+        * localeTimeStamp().
+        */
 
-       var jsonStringifyPrettyCompact = stringify;
-
-       var _default$3 = /*#__PURE__*/function () {
-         // constructor
-         //
-         // `fc`  Optional FeatureCollection of known features
-         //
-         // Optionally pass a GeoJSON FeatureCollection of known features which we can refer to later.
-         // Each feature must have a filename-like `id`, for example: `something.geojson`
-         //
-         // {
-         //   "type": "FeatureCollection"
-         //   "features": [
-         //     {
-         //       "type": "Feature",
-         //       "id": "philly_metro.geojson",
-         //       "properties": { … },
-         //       "geometry": { … }
-         //     }
-         //   ]
-         // }
-         function _default(fc) {
-           var _this = this;
 
-           _classCallCheck(this, _default);
+       function localeTimestamp(s) {
+         if (!s) return null;
+         var options = {
+           day: 'numeric',
+           month: 'short',
+           year: 'numeric'
+         };
+         var d = new Date(s);
+         if (isNaN(d.getTime())) return null;
+         return d.toLocaleString(_mainLocalizer.localeCode(), options);
+       }
+       /**
+        * loadTiles() wraps the process of generating tiles and then fetching image points for each tile.
+        */
 
-           // The _cache retains resolved features, so if you ask for the same thing multiple times
-           // we don't repeat the expensive resolving/clipping operations.
-           //
-           // Each feature has a stable identifier that is used as the cache key.
-           // The identifiers look like:
-           // - for point locations, the stringified point:          e.g. '[8.67039,49.41882]'
-           // - for geojson locations, the geojson id:               e.g. 'de-hamburg.geojson'
-           // - for countrycoder locations, feature.id property:     e.g. 'Q2'  (countrycoder uses Wikidata identifiers)
-           // - for aggregated locationSets, +[include]-[exclude]:   e.g '+[Q2]-[Q18,Q27611]'
-           this._cache = {}; // When strict mode = true, throw on invalid locations or locationSets.
-           // When strict mode = false, return `null` for invalid locations or locationSets.
 
-           this._strict = true; // process input FeatureCollection
+       function loadTiles(which, url, projection, margin) {
+         var tiles = tiler$1.margin(margin).getTiles(projection); // abort inflight requests that are no longer needed
 
-           if (fc && fc.type === 'FeatureCollection' && Array.isArray(fc.features)) {
-             fc.features.forEach(function (feature) {
-               feature.properties = feature.properties || {};
-               var props = feature.properties; // get `id` from either `id` or `properties`
+         var cache = _ssCache[which];
+         Object.keys(cache.inflight).forEach(function (k) {
+           var wanted = tiles.find(function (tile) {
+             return k.indexOf(tile.id + ',') === 0;
+           });
 
-               var id = feature.id || props.id;
-               if (!id || !/^\S+\.geojson$/i.test(id)) return; // ensure `id` exists and is lowercase
+           if (!wanted) {
+             abortRequest$1(cache.inflight[k]);
+             delete cache.inflight[k];
+           }
+         });
+         tiles.forEach(function (tile) {
+           return loadNextTilePage(which, url, tile);
+         });
+       }
+       /**
+        * loadNextTilePage() load data for the next tile page in line.
+        */
 
-               id = id.toLowerCase();
-               feature.id = id;
-               props.id = id; // ensure `area` property exists
 
-               if (!props.area) {
-                 var area = geojsonArea.geometry(feature.geometry) / 1e6; // m² to km²
+       function loadNextTilePage(which, url, tile) {
+         var cache = _ssCache[which];
+         var nextPage = cache.nextPage[tile.id] || 0;
+         var id = tile.id + ',' + String(nextPage);
+         if (cache.loaded[id] || cache.inflight[id]) return;
+         cache.inflight[id] = getBubbles(url, tile, function (bubbles) {
+           cache.loaded[id] = true;
+           delete cache.inflight[id];
+           if (!bubbles) return; // [].shift() removes the first element, some statistics info, not a bubble point
 
-                 props.area = Number(area.toFixed(2));
-               }
+           bubbles.shift();
+           var features = bubbles.map(function (bubble) {
+             if (cache.points[bubble.id]) return null; // skip duplicates
 
-               _this._cache[id] = feature;
-             });
-           } // Replace CountryCoder world geometry to be a polygon covering the world.
+             var loc = [bubble.lo, bubble.la];
+             var d = {
+               loc: loc,
+               key: bubble.id,
+               ca: bubble.he,
+               captured_at: bubble.cd,
+               captured_by: 'microsoft',
+               // nbn: bubble.nbn,
+               // pbn: bubble.pbn,
+               // ad: bubble.ad,
+               // rn: bubble.rn,
+               pr: bubble.pr,
+               // previous
+               ne: bubble.ne,
+               // next
+               pano: true,
+               sequenceKey: null
+             };
+             cache.points[bubble.id] = d; // a sequence starts here
 
+             if (bubble.pr === undefined) {
+               cache.leaders.push(bubble.id);
+             }
 
-           var world = _cloneDeep(feature('Q2'));
+             return {
+               minX: loc[0],
+               minY: loc[1],
+               maxX: loc[0],
+               maxY: loc[1],
+               data: d
+             };
+           }).filter(Boolean);
+           cache.rtree.load(features);
+           connectSequences();
 
-           world.geometry = {
-             type: 'Polygon',
-             coordinates: [[[-180, -90], [180, -90], [180, 90], [-180, 90], [-180, -90]]]
-           };
-           world.id = 'Q2';
-           world.properties.id = 'Q2';
-           world.properties.area = geojsonArea.geometry(world.geometry) / 1e6; // m² to km²
+           if (which === 'bubbles') {
+             dispatch$1.call('loadedImages');
+           }
+         });
+       } // call this sometimes to connect the bubbles into sequences
 
-           this._cache.Q2 = world;
-         } // validateLocation
-         // `location`  The location to validate
-         //
-         // Pass a `location` value to validate
-         //
-         // Returns a result like:
-         //   {
-         //     type:     'point', 'geojson', or 'countrycoder'
-         //     location:  the queried location
-         //     id:        the stable identifier for the feature
-         //   }
-         // or `null` if the location is invalid
-         //
 
+       function connectSequences() {
+         var cache = _ssCache.bubbles;
+         var keepLeaders = [];
 
-         _createClass(_default, [{
-           key: "validateLocation",
-           value: function validateLocation(location) {
-             if (Array.isArray(location)) {
-               // a [lon,lat] coordinate pair?
-               if (location.length === 2 && Number.isFinite(location[0]) && Number.isFinite(location[1]) && location[0] >= -180 && location[0] <= 180 && location[1] >= -90 && location[1] <= 90) {
-                 var id = '[' + location.toString() + ']';
-                 return {
-                   type: 'point',
-                   location: location,
-                   id: id
-                 };
-               }
-             } else if (typeof location === 'string' && /^\S+\.geojson$/i.test(location)) {
-               // a .geojson filename?
-               var _id = location.toLowerCase();
+         for (var i = 0; i < cache.leaders.length; i++) {
+           var bubble = cache.points[cache.leaders[i]];
+           var seen = {}; // try to make a sequence.. use the key of the leader bubble.
 
-               if (this._cache[_id]) {
-                 return {
-                   type: 'geojson',
-                   location: location,
-                   id: _id
-                 };
-               }
-             } else if (typeof location === 'string' || typeof location === 'number') {
-               // a country-coder value?
-               var feature$1 = feature(location);
+           var sequence = {
+             key: bubble.key,
+             bubbles: []
+           };
+           var complete = false;
 
-               if (feature$1) {
-                 // Use wikidata QID as the identifier, since that seems to be the one
-                 // property that everything in CountryCoder is guaranteed to have.
-                 var _id2 = feature$1.properties.wikidata;
-                 return {
-                   type: 'countrycoder',
-                   location: location,
-                   id: _id2
-                 };
-               }
-             }
+           do {
+             sequence.bubbles.push(bubble);
+             seen[bubble.key] = true;
 
-             if (this._strict) {
-               throw new Error("validateLocation:  Invalid location: \"".concat(location, "\"."));
+             if (bubble.ne === undefined) {
+               complete = true;
              } else {
-               return null;
+               bubble = cache.points[bubble.ne]; // advance to next
              }
-           } // resolveLocation
-           // `location`  The location to resolve
-           //
-           // Pass a `location` value to resolve
-           //
-           // Returns a result like:
-           //   {
-           //     type:      'point', 'geojson', or 'countrycoder'
-           //     location:  the queried location
-           //     id:        a stable identifier for the feature
-           //     feature:   the resolved GeoJSON feature
-           //   }
-           //  or `null` if the location is invalid
-           //
+           } while (bubble && !seen[bubble.key] && !complete);
 
-         }, {
-           key: "resolveLocation",
-           value: function resolveLocation(location) {
-             var valid = this.validateLocation(location);
-             if (!valid) return null;
-             var id = valid.id; // return a result from cache if we can
+           if (complete) {
+             _ssCache.sequences[sequence.key] = sequence; // assign bubbles to the sequence
 
-             if (this._cache[id]) {
-               return Object.assign(valid, {
-                 feature: this._cache[id]
-               });
-             } // a [lon,lat] coordinate pair?
+             for (var j = 0; j < sequence.bubbles.length; j++) {
+               sequence.bubbles[j].sequenceKey = sequence.key;
+             } // create a GeoJSON LineString
 
 
-             if (valid.type === 'point') {
-               var RADIUS = 25000; // meters
+             sequence.geojson = {
+               type: 'LineString',
+               properties: {
+                 captured_at: sequence.bubbles[0] ? sequence.bubbles[0].captured_at : null,
+                 captured_by: sequence.bubbles[0] ? sequence.bubbles[0].captured_by : null,
+                 key: sequence.key
+               },
+               coordinates: sequence.bubbles.map(function (d) {
+                 return d.loc;
+               })
+             };
+           } else {
+             keepLeaders.push(cache.leaders[i]);
+           }
+         } // couldn't complete these, save for later
 
-               var EDGES = 10;
-               var PRECISION = 3;
-               var area = Math.PI * RADIUS * RADIUS / 1e6; // m² to km²
 
-               var feature$1 = this._cache[id] = geojsonPrecision({
-                 type: 'Feature',
-                 id: id,
-                 properties: {
-                   id: id,
-                   area: Number(area.toFixed(2))
-                 },
-                 geometry: circleToPolygon(location, RADIUS, EDGES)
-               }, PRECISION);
-               return Object.assign(valid, {
-                 feature: feature$1
-               }); // a .geojson filename?
-             } else if (valid.type === 'geojson') ; else if (valid.type === 'countrycoder') {
-               var _feature = _cloneDeep(feature(id));
+         cache.leaders = keepLeaders;
+       }
+       /**
+        * getBubbles() handles the request to the server for a tile extent of 'bubbles' (streetside image locations).
+        */
 
-               var props = _feature.properties; // -> This block of code is weird and requires some explanation. <-
-               // CountryCoder includes higher level features which are made up of members.
-               // These features don't have their own geometry, but CountryCoder provides an
-               //   `aggregateFeature` method to combine these members into a MultiPolygon.
-               // BUT, when we try to actually work with these aggregated MultiPolygons,
-               //   Turf/JSTS gets crashy because of topography bugs.
-               // SO, we'll aggregate the features ourselves by unioning them together.
-               // This approach also has the benefit of removing all the internal boaders and
-               //   simplifying the regional polygons a lot.
 
-               if (Array.isArray(props.members)) {
-                 var seed = _feature.geometry ? _feature : null;
-                 var aggregate = props.members.reduce(_locationReducer.bind(this), seed);
-                 _feature.geometry = aggregate.geometry;
-               } // ensure `area` property exists
+       function getBubbles(url, tile, callback) {
+         var rect = tile.extent.rectangle();
+         var urlForRequest = url + utilQsString({
+           n: rect[3],
+           s: rect[1],
+           e: rect[2],
+           w: rect[0],
+           c: maxResults,
+           appkey: bubbleAppKey,
+           jsCallback: '{callback}'
+         });
+         return jsonpRequest(urlForRequest, function (data) {
+           if (!data || data.error) {
+             callback(null);
+           } else {
+             callback(data);
+           }
+         });
+       } // partition viewport into higher zoom tiles
 
 
-               if (!props.area) {
-                 var _area = geojsonArea.geometry(_feature.geometry) / 1e6; // m² to km²
+       function partitionViewport(projection) {
+         var z = geoScaleToZoom(projection.scale());
+         var z2 = Math.ceil(z * 2) / 2 + 2.5; // round to next 0.5 and add 2.5
 
+         var tiler = utilTiler().zoomExtent([z2, z2]);
+         return tiler.getTiles(projection).map(function (tile) {
+           return tile.extent;
+         });
+       } // no more than `limit` results per partition.
 
-                 props.area = Number(_area.toFixed(2));
-               } // ensure `id` property exists
 
+       function searchLimited(limit, projection, rtree) {
+         limit = limit || 5;
+         return partitionViewport(projection).reduce(function (result, extent) {
+           var found = rtree.search(extent.bbox()).slice(0, limit).map(function (d) {
+             return d.data;
+           });
+           return found.length ? result.concat(found) : result;
+         }, []);
+       }
+       /**
+        * loadImage()
+        */
 
-               _feature.id = id;
-               props.id = id;
-               this._cache[id] = _feature;
-               return Object.assign(valid, {
-                 feature: _feature
-               });
-             }
 
-             if (this._strict) {
-               throw new Error("resolveLocation:  Couldn't resolve location \"".concat(location, "\"."));
-             } else {
-               return null;
-             }
-           } // validateLocationSet
-           // `locationSet`  the locationSet to validate
-           //
-           // Pass a locationSet Object to validate like:
-           //   {
-           //     include: [ Array of locations ],
-           //     exclude: [ Array of locations ]
-           //   }
-           //
-           // Returns a result like:
-           //   {
-           //     type:         'locationset'
-           //     locationSet:  the queried locationSet
-           //     id:           the stable identifier for the feature
-           //   }
-           // or `null` if the locationSet is invalid
-           //
+       function loadImage(imgInfo) {
+         return new Promise(function (resolve) {
+           var img = new Image();
 
-         }, {
-           key: "validateLocationSet",
-           value: function validateLocationSet(locationSet) {
-             locationSet = locationSet || {};
-             var validator = this.validateLocation.bind(this);
-             var include = (locationSet.include || []).map(validator).filter(Boolean);
-             var exclude = (locationSet.exclude || []).map(validator).filter(Boolean);
+           img.onload = function () {
+             var canvas = document.getElementById('ideditor-canvas' + imgInfo.face);
+             var ctx = canvas.getContext('2d');
+             ctx.drawImage(img, imgInfo.x, imgInfo.y);
+             resolve({
+               imgInfo: imgInfo,
+               status: 'ok'
+             });
+           };
 
-             if (!include.length) {
-               if (this._strict) {
-                 throw new Error("validateLocationSet:  LocationSet includes nothing.");
-               } else {
-                 // non-strict mode, replace an empty locationSet with one that includes "the world"
-                 locationSet.include = ['Q2'];
-                 include = [{
-                   type: 'countrycoder',
-                   location: 'Q2',
-                   id: 'Q2'
-                 }];
-               }
-             } // generate stable identifier
+           img.onerror = function () {
+             resolve({
+               data: imgInfo,
+               status: 'error'
+             });
+           };
 
+           img.setAttribute('crossorigin', '');
+           img.src = imgInfo.url;
+         });
+       }
+       /**
+        * loadCanvas()
+        */
 
-             include.sort(_sortLocations);
-             var id = '+[' + include.map(function (d) {
-               return d.id;
-             }).join(',') + ']';
 
-             if (exclude.length) {
-               exclude.sort(_sortLocations);
-               id += '-[' + exclude.map(function (d) {
-                 return d.id;
-               }).join(',') + ']';
-             }
+       function loadCanvas(imageGroup) {
+         return Promise.all(imageGroup.map(loadImage)).then(function (data) {
+           var canvas = document.getElementById('ideditor-canvas' + data[0].imgInfo.face);
+           var which = {
+             '01': 0,
+             '02': 1,
+             '03': 2,
+             '10': 3,
+             '11': 4,
+             '12': 5
+           };
+           var face = data[0].imgInfo.face;
+           _sceneOptions.cubeMap[which[face]] = canvas.toDataURL('image/jpeg', 1.0);
+           return {
+             status: 'loadCanvas for face ' + data[0].imgInfo.face + 'ok'
+           };
+         });
+       }
+       /**
+        * loadFaces()
+        */
 
-             return {
-               type: 'locationset',
-               locationSet: locationSet,
-               id: id
-             };
-           } // resolveLocationSet
-           // `locationSet`  the locationSet to resolve
-           //
-           // Pass a locationSet Object to validate like:
-           //   {
-           //     include: [ Array of locations ],
-           //     exclude: [ Array of locations ]
-           //   }
-           //
-           // Returns a result like:
-           //   {
-           //     type:         'locationset'
-           //     locationSet:  the queried locationSet
-           //     id:           the stable identifier for the feature
-           //     feature:      the resolved GeoJSON feature
-           //   }
-           // or `null` if the locationSet is invalid
-           //
 
-         }, {
-           key: "resolveLocationSet",
-           value: function resolveLocationSet(locationSet) {
-             locationSet = locationSet || {};
-             var valid = this.validateLocationSet(locationSet);
-             if (!valid) return null;
-             var id = valid.id; // return a result from cache if we can
+       function loadFaces(faceGroup) {
+         return Promise.all(faceGroup.map(loadCanvas)).then(function () {
+           return {
+             status: 'loadFaces done'
+           };
+         });
+       }
 
-             if (this._cache[id]) {
-               return Object.assign(valid, {
-                 feature: this._cache[id]
-               });
-             }
+       function setupCanvas(selection, reset) {
+         if (reset) {
+           selection.selectAll('#ideditor-stitcher-canvases').remove();
+         } // Add the Streetside working canvases. These are used for 'stitching', or combining,
+         // multiple images for each of the six faces, before passing to the Pannellum control as DataUrls
 
-             var resolver = this.resolveLocation.bind(this);
-             var include = (locationSet.include || []).map(resolver).filter(Boolean);
-             var exclude = (locationSet.exclude || []).map(resolver).filter(Boolean); // return quickly if it's a single included location..
 
-             if (include.length === 1 && exclude.length === 0) {
-               return Object.assign(valid, {
-                 feature: include[0].feature
-               });
-             } // calculate unions
+         selection.selectAll('#ideditor-stitcher-canvases').data([0]).enter().append('div').attr('id', 'ideditor-stitcher-canvases').attr('display', 'none').selectAll('canvas').data(['canvas01', 'canvas02', 'canvas03', 'canvas10', 'canvas11', 'canvas12']).enter().append('canvas').attr('id', function (d) {
+           return 'ideditor-' + d;
+         }).attr('width', _resolution).attr('height', _resolution);
+       }
 
+       function qkToXY(qk) {
+         var x = 0;
+         var y = 0;
+         var scale = 256;
 
-             var includeGeoJSON = include.map(function (d) {
-               return d.location;
-             }).reduce(_locationReducer.bind(this), null);
-             var excludeGeoJSON = exclude.map(function (d) {
-               return d.location;
-             }).reduce(_locationReducer.bind(this), null); // calculate difference, update `area` and return result
+         for (var i = qk.length; i > 0; i--) {
+           var key = qk[i - 1];
+           x += +(key === '1' || key === '3') * scale;
+           y += +(key === '2' || key === '3') * scale;
+           scale *= 2;
+         }
 
-             var resultGeoJSON = excludeGeoJSON ? _clip(includeGeoJSON, excludeGeoJSON, 'DIFFERENCE') : includeGeoJSON;
-             var area = geojsonArea.geometry(resultGeoJSON.geometry) / 1e6; // m² to km²
+         return [x, y];
+       }
 
-             resultGeoJSON.id = id;
-             resultGeoJSON.properties = {
-               id: id,
-               area: Number(area.toFixed(2))
-             };
-             this._cache[id] = resultGeoJSON;
-             return Object.assign(valid, {
-               feature: resultGeoJSON
-             });
-           } // strict
-           //
+       function getQuadKeys() {
+         var dim = _resolution / 256;
+         var quadKeys;
 
-         }, {
-           key: "strict",
-           value: function strict(val) {
-             if (val === undefined) {
-               // get
-               return this._strict;
-             } else {
-               // set
-               this._strict = val;
-               return this;
-             }
-           } // cache
-           // convenience method to access the internal cache
+         if (dim === 16) {
+           quadKeys = ['0000', '0001', '0010', '0011', '0100', '0101', '0110', '0111', '1000', '1001', '1010', '1011', '1100', '1101', '1110', '1111', '0002', '0003', '0012', '0013', '0102', '0103', '0112', '0113', '1002', '1003', '1012', '1013', '1102', '1103', '1112', '1113', '0020', '0021', '0030', '0031', '0120', '0121', '0130', '0131', '1020', '1021', '1030', '1031', '1120', '1121', '1130', '1131', '0022', '0023', '0032', '0033', '0122', '0123', '0132', '0133', '1022', '1023', '1032', '1033', '1122', '1123', '1132', '1133', '0200', '0201', '0210', '0211', '0300', '0301', '0310', '0311', '1200', '1201', '1210', '1211', '1300', '1301', '1310', '1311', '0202', '0203', '0212', '0213', '0302', '0303', '0312', '0313', '1202', '1203', '1212', '1213', '1302', '1303', '1312', '1313', '0220', '0221', '0230', '0231', '0320', '0321', '0330', '0331', '1220', '1221', '1230', '1231', '1320', '1321', '1330', '1331', '0222', '0223', '0232', '0233', '0322', '0323', '0332', '0333', '1222', '1223', '1232', '1233', '1322', '1323', '1332', '1333', '2000', '2001', '2010', '2011', '2100', '2101', '2110', '2111', '3000', '3001', '3010', '3011', '3100', '3101', '3110', '3111', '2002', '2003', '2012', '2013', '2102', '2103', '2112', '2113', '3002', '3003', '3012', '3013', '3102', '3103', '3112', '3113', '2020', '2021', '2030', '2031', '2120', '2121', '2130', '2131', '3020', '3021', '3030', '3031', '3120', '3121', '3130', '3131', '2022', '2023', '2032', '2033', '2122', '2123', '2132', '2133', '3022', '3023', '3032', '3033', '3122', '3123', '3132', '3133', '2200', '2201', '2210', '2211', '2300', '2301', '2310', '2311', '3200', '3201', '3210', '3211', '3300', '3301', '3310', '3311', '2202', '2203', '2212', '2213', '2302', '2303', '2312', '2313', '3202', '3203', '3212', '3213', '3302', '3303', '3312', '3313', '2220', '2221', '2230', '2231', '2320', '2321', '2330', '2331', '3220', '3221', '3230', '3231', '3320', '3321', '3330', '3331', '2222', '2223', '2232', '2233', '2322', '2323', '2332', '2333', '3222', '3223', '3232', '3233', '3322', '3323', '3332', '3333'];
+         } else if (dim === 8) {
+           quadKeys = ['000', '001', '010', '011', '100', '101', '110', '111', '002', '003', '012', '013', '102', '103', '112', '113', '020', '021', '030', '031', '120', '121', '130', '131', '022', '023', '032', '033', '122', '123', '132', '133', '200', '201', '210', '211', '300', '301', '310', '311', '202', '203', '212', '213', '302', '303', '312', '313', '220', '221', '230', '231', '320', '321', '330', '331', '222', '223', '232', '233', '322', '323', '332', '333'];
+         } else if (dim === 4) {
+           quadKeys = ['00', '01', '10', '11', '02', '03', '12', '13', '20', '21', '30', '31', '22', '23', '32', '33'];
+         } else {
+           // dim === 2
+           quadKeys = ['0', '1', '2', '3'];
+         }
 
-         }, {
-           key: "cache",
-           value: function cache() {
-             return this._cache;
-           } // stringify
-           // convenience method to prettyStringify the given object
+         return quadKeys;
+       }
 
-         }, {
-           key: "stringify",
-           value: function stringify(obj, options) {
-             return jsonStringifyPrettyCompact(obj, options);
+       var serviceStreetside = {
+         /**
+          * init() initialize streetside.
+          */
+         init: function init() {
+           if (!_ssCache) {
+             this.reset();
            }
-         }]);
 
-         return _default;
-       }(); // Wrap the mfogel/polygon-clipping library and return a GeoJSON feature.
+           this.event = utilRebind(this, dispatch$1, 'on');
+         },
 
-       function _clip(a, b, which) {
-         var fn = {
-           UNION: index$1.union,
-           DIFFERENCE: index$1.difference
-         }[which];
-         var coords = fn(a.geometry.coordinates, b.geometry.coordinates);
-         return {
-           type: 'Feature',
-           properties: {},
-           geometry: {
-             type: whichType(coords),
-             coordinates: coords
+         /**
+          * reset() reset the cache.
+          */
+         reset: function reset() {
+           if (_ssCache) {
+             Object.values(_ssCache.bubbles.inflight).forEach(abortRequest$1);
            }
-         }; // is this a Polygon or a MultiPolygon?
 
-         function whichType(coords) {
-           var a = Array.isArray(coords);
-           var b = a && Array.isArray(coords[0]);
-           var c = b && Array.isArray(coords[0][0]);
-           var d = c && Array.isArray(coords[0][0][0]);
-           return d ? 'MultiPolygon' : 'Polygon';
-         }
-       } // Reduce an array of locations into a single GeoJSON feature
+           _ssCache = {
+             bubbles: {
+               inflight: {},
+               loaded: {},
+               nextPage: {},
+               rtree: new RBush(),
+               points: {},
+               leaders: []
+             },
+             sequences: {}
+           };
+         },
 
+         /**
+          * bubbles()
+          */
+         bubbles: function bubbles(projection) {
+           var limit = 5;
+           return searchLimited(limit, projection, _ssCache.bubbles.rtree);
+         },
+         cachedImage: function cachedImage(imageKey) {
+           return _ssCache.bubbles.points[imageKey];
+         },
+         sequences: function sequences(projection) {
+           var viewport = projection.clipExtent();
+           var min = [viewport[0][0], viewport[1][1]];
+           var max = [viewport[1][0], viewport[0][1]];
+           var bbox = geoExtent(projection.invert(min), projection.invert(max)).bbox();
+           var seen = {};
+           var results = []; // all sequences for bubbles in viewport
 
-       function _locationReducer(accumulator, location) {
-         /* eslint-disable no-console, no-invalid-this */
-         var result;
+           _ssCache.bubbles.rtree.search(bbox).forEach(function (d) {
+             var key = d.data.sequenceKey;
 
-         try {
-           var resolved = this.resolveLocation(location);
+             if (key && !seen[key]) {
+               seen[key] = true;
+               results.push(_ssCache.sequences[key].geojson);
+             }
+           });
 
-           if (!resolved || !resolved.feature) {
-             console.warn("Warning:  Couldn't resolve location \"".concat(location, "\""));
-             return accumulator;
-           }
+           return results;
+         },
 
-           result = !accumulator ? resolved.feature : _clip(accumulator, resolved.feature, 'UNION');
-         } catch (e) {
-           console.warn("Warning:  Error resolving location \"".concat(location, "\""));
-           console.warn(e);
-           result = accumulator;
-         }
+         /**
+          * loadBubbles()
+          */
+         loadBubbles: function loadBubbles(projection, margin) {
+           // by default: request 2 nearby tiles so we can connect sequences.
+           if (margin === undefined) margin = 2;
+           loadTiles('bubbles', bubbleApi, projection, margin);
+         },
+         viewer: function viewer() {
+           return _pannellumViewer;
+         },
+         initViewer: function initViewer() {
+           if (!window.pannellum) return;
+           if (_pannellumViewer) return;
+           _currScene += 1;
+
+           var sceneID = _currScene.toString();
+
+           var options = {
+             'default': {
+               firstScene: sceneID
+             },
+             scenes: {}
+           };
+           options.scenes[sceneID] = _sceneOptions;
+           _pannellumViewer = window.pannellum.viewer('ideditor-viewer-streetside', options);
+         },
+         ensureViewerLoaded: function ensureViewerLoaded(context) {
+           if (_loadViewerPromise) return _loadViewerPromise; // create ms-wrapper, a photo wrapper class
 
-         return result;
-         /* eslint-enable no-console, no-invalid-this */
-       }
+           var wrap = context.container().select('.photoviewer').selectAll('.ms-wrapper').data([0]); // inject ms-wrapper into the photoviewer div
+           // (used by all to house each custom photo viewer)
 
-       function _cloneDeep(obj) {
-         return JSON.parse(JSON.stringify(obj));
-       } // Sorting the location lists is ok because they end up unioned together.
-       // This sorting makes it possible to generate a deterministic id.
+           var wrapEnter = wrap.enter().append('div').attr('class', 'photo-wrapper ms-wrapper').classed('hide', true);
+           var that = this;
+           var pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse'; // inject div to support streetside viewer (pannellum) and attribution line
 
+           wrapEnter.append('div').attr('id', 'ideditor-viewer-streetside').on(pointerPrefix + 'down.streetside', function () {
+             select(window).on(pointerPrefix + 'move.streetside', function () {
+               dispatch$1.call('viewerChanged');
+             }, true);
+           }).on(pointerPrefix + 'up.streetside pointercancel.streetside', function () {
+             select(window).on(pointerPrefix + 'move.streetside', null); // continue dispatching events for a few seconds, in case viewer has inertia.
 
-       function _sortLocations(a, b) {
-         var rank = {
-           countrycoder: 1,
-           geojson: 2,
-           point: 3
-         };
-         var aRank = rank[a.type];
-         var bRank = rank[b.type];
-         return aRank > bRank ? 1 : aRank < bRank ? -1 : a.id.localeCompare(b.id);
-       }
+             var t = timer(function (elapsed) {
+               dispatch$1.call('viewerChanged');
 
-       var _oci = null;
-       function uiSuccess(context) {
-         var MAXEVENTS = 2;
-         var dispatch$1 = dispatch('cancel');
+               if (elapsed > 2000) {
+                 t.stop();
+               }
+             });
+           }).append('div').attr('class', 'photo-attribution fillD');
+           var controlsEnter = wrapEnter.append('div').attr('class', 'photo-controls-wrap').append('div').attr('class', 'photo-controls');
+           controlsEnter.append('button').on('click.back', step(-1)).text('◄');
+           controlsEnter.append('button').on('click.forward', step(1)).text('►'); // create working canvas for stitching together images
 
-         var _changeset;
+           wrap = wrap.merge(wrapEnter).call(setupCanvas, true); // Register viewer resize handler
 
-         var _location;
+           context.ui().photoviewer.on('resize.streetside', function () {
+             if (_pannellumViewer) {
+               _pannellumViewer.resize();
+             }
+           });
+           _loadViewerPromise = new Promise(function (resolve, reject) {
+             var loadedCount = 0;
 
-         ensureOSMCommunityIndex(); // start fetching the data
+             function loaded() {
+               loadedCount += 1; // wait until both files are loaded
 
-         function ensureOSMCommunityIndex() {
-           var data = _mainFileFetcher;
-           return Promise.all([data.get('oci_resources'), data.get('oci_features')]).then(function (vals) {
-             if (_oci) return _oci;
-             var ociResources = vals[0].resources;
-             var loco = new _default$3(vals[1]);
-             var ociFeatures = {};
-             Object.values(ociResources).forEach(function (resource) {
-               var feature = loco.resolveLocationSet(resource.locationSet).feature;
-               var ociFeature = ociFeatures[feature.id];
+               if (loadedCount === 2) resolve();
+             }
 
-               if (!ociFeature) {
-                 ociFeature = JSON.parse(JSON.stringify(feature)); // deep clone
+             var head = select('head'); // load streetside pannellum viewer css
 
-                 ociFeature.properties.resourceIDs = new Set();
-                 ociFeatures[feature.id] = ociFeature;
-               }
+             head.selectAll('#ideditor-streetside-viewercss').data([0]).enter().append('link').attr('id', 'ideditor-streetside-viewercss').attr('rel', 'stylesheet').attr('crossorigin', 'anonymous').attr('href', context.asset(pannellumViewerCSS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+               reject();
+             }); // load streetside pannellum viewer js
 
-               ociFeature.properties.resourceIDs.add(resource.id);
+             head.selectAll('#ideditor-streetside-viewerjs').data([0]).enter().append('script').attr('id', 'ideditor-streetside-viewerjs').attr('crossorigin', 'anonymous').attr('src', context.asset(pannellumViewerJS)).on('load.serviceStreetside', loaded).on('error.serviceStreetside', function () {
+               reject();
              });
-             return _oci = {
-               features: ociFeatures,
-               resources: ociResources,
-               query: whichPolygon_1({
-                 type: 'FeatureCollection',
-                 features: Object.values(ociFeatures)
-               })
-             };
+           })["catch"](function () {
+             _loadViewerPromise = null;
            });
-         } // string-to-date parsing in JavaScript is weird
+           return _loadViewerPromise;
 
+           function step(stepBy) {
+             return function () {
+               var viewer = context.container().select('.photoviewer');
+               var selected = viewer.empty() ? undefined : viewer.datum();
+               if (!selected) return;
+               var nextID = stepBy === 1 ? selected.ne : selected.pr;
 
-         function parseEventDate(when) {
-           if (!when) return;
-           var raw = when.trim();
-           if (!raw) return;
+               var yaw = _pannellumViewer.getYaw();
 
-           if (!/Z$/.test(raw)) {
-             // if no trailing 'Z', add one
-             raw += 'Z'; // this forces date to be parsed as a UTC date
-           }
+               var ca = selected.ca + yaw;
+               var origin = selected.loc; // construct a search trapezoid pointing out from current bubble
 
-           var parsed = new Date(raw);
-           return new Date(parsed.toUTCString().substr(0, 25)); // convert to local timezone
-         }
+               var meters = 35;
+               var p1 = [origin[0] + geoMetersToLon(meters / 5, origin[1]), origin[1]];
+               var p2 = [origin[0] + geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+               var p3 = [origin[0] - geoMetersToLon(meters / 2, origin[1]), origin[1] + geoMetersToLat(meters)];
+               var p4 = [origin[0] - geoMetersToLon(meters / 5, origin[1]), origin[1]];
+               var poly = [p1, p2, p3, p4, p1]; // rotate it to face forward/backward
 
-         function success(selection) {
-           var header = selection.append('div').attr('class', 'header fillL');
-           header.append('h3').html(_t.html('success.just_edited'));
-           header.append('button').attr('class', 'close').on('click', function () {
-             return dispatch$1.call('cancel');
-           }).call(svgIcon('#iD-icon-close'));
-           var body = selection.append('div').attr('class', 'body save-success fillL');
-           var summary = body.append('div').attr('class', 'save-summary');
-           summary.append('h3').html(_t.html('success.thank_you' + (_location ? '_location' : ''), {
-             where: _location
-           }));
-           summary.append('p').html(_t.html('success.help_html')).append('a').attr('class', 'link-out').attr('target', '_blank').attr('href', _t('success.help_link_url')).call(svgIcon('#iD-icon-out-link', 'inline')).append('span').html(_t.html('success.help_link_text'));
-           var osm = context.connection();
-           if (!osm) return;
-           var changesetURL = osm.changesetURL(_changeset.id);
-           var table = summary.append('table').attr('class', 'summary-table');
-           var row = table.append('tr').attr('class', 'summary-row');
-           row.append('td').attr('class', 'cell-icon summary-icon').append('a').attr('target', '_blank').attr('href', changesetURL).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', '#iD-logo-osm');
-           var summaryDetail = row.append('td').attr('class', 'cell-detail summary-detail');
-           summaryDetail.append('a').attr('class', 'cell-detail summary-view-on-osm').attr('target', '_blank').attr('href', changesetURL).html(_t.html('success.view_on_osm'));
-           summaryDetail.append('div').html(_t.html('success.changeset_id', {
-             changeset_id: "<a href=\"".concat(changesetURL, "\" target=\"_blank\">").concat(_changeset.id, "</a>")
-           })); // Get OSM community index features intersecting the map..
+               var angle = (stepBy === 1 ? ca : ca + 180) * (Math.PI / 180);
+               poly = geoRotate(poly, -angle, origin);
+               var extent = poly.reduce(function (extent, point) {
+                 return extent.extend(geoExtent(point));
+               }, geoExtent()); // find nearest other bubble in the search polygon
 
-           ensureOSMCommunityIndex().then(function (oci) {
-             var communities = [];
-             var properties = oci.query(context.map().center(), true) || []; // Gather the communities from the result
-
-             properties.forEach(function (props) {
-               var resourceIDs = Array.from(props.resourceIDs);
-               resourceIDs.forEach(function (resourceID) {
-                 var resource = oci.resources[resourceID];
-                 communities.push({
-                   area: props.area || Infinity,
-                   order: resource.order || 0,
-                   resource: resource
-                 });
-               });
-             }); // sort communities by feature area ascending, community order descending
+               var minDist = Infinity;
 
-             communities.sort(function (a, b) {
-               return a.area - b.area || b.order - a.order;
-             });
-             body.call(showCommunityLinks, communities.map(function (c) {
-               return c.resource;
-             }));
-           });
-         }
+               _ssCache.bubbles.rtree.search(extent.bbox()).forEach(function (d) {
+                 if (d.data.key === selected.key) return;
+                 if (!geoPointInPolygon(d.data.loc, poly)) return;
+                 var dist = geoVecLength(d.data.loc, selected.loc);
+                 var theta = selected.ca - d.data.ca;
+                 var minTheta = Math.min(Math.abs(theta), 360 - Math.abs(theta));
 
-         function showCommunityLinks(selection, resources) {
-           var communityLinks = selection.append('div').attr('class', 'save-communityLinks');
-           communityLinks.append('h3').html(_t.html('success.like_osm'));
-           var table = communityLinks.append('table').attr('class', 'community-table');
-           var row = table.selectAll('.community-row').data(resources);
-           var rowEnter = row.enter().append('tr').attr('class', 'community-row');
-           rowEnter.append('td').attr('class', 'cell-icon community-icon').append('a').attr('target', '_blank').attr('href', function (d) {
-             return d.url;
-           }).append('svg').attr('class', 'logo-small').append('use').attr('xlink:href', function (d) {
-             return "#community-".concat(d.type);
-           });
-           var communityDetail = rowEnter.append('td').attr('class', 'cell-detail community-detail');
-           communityDetail.each(showCommunityDetails);
-           communityLinks.append('div').attr('class', 'community-missing').html(_t.html('success.missing')).append('a').attr('class', 'link-out').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmlab/osm-community-index/issues').append('span').html(_t.html('success.tell_us'));
-         }
+                 if (minTheta > 20) {
+                   dist += 5; // penalize distance if camera angles don't match
+                 }
 
-         function showCommunityDetails(d) {
-           var selection = select(this);
-           var communityID = d.id;
-           var replacements = {
-             url: linkify(d.url),
-             signupUrl: linkify(d.signupUrl || d.url)
-           };
-           selection.append('div').attr('class', 'community-name').append('a').attr('target', '_blank').attr('href', d.url).html(_t.html("community.".concat(d.id, ".name")));
-           var descriptionHTML = _t.html("community.".concat(d.id, ".description"), replacements);
+                 if (dist < minDist) {
+                   nextID = d.data.key;
+                   minDist = dist;
+                 }
+               });
 
-           if (d.type === 'reddit') {
-             // linkify subreddits  #4997
-             descriptionHTML = descriptionHTML.replace(/(\/r\/\w*\/*)/i, function (match) {
-               return linkify(d.url, match);
-             });
+               var nextBubble = nextID && that.cachedImage(nextID);
+               if (!nextBubble) return;
+               context.map().centerEase(nextBubble.loc);
+               that.selectImage(context, nextBubble.key).yaw(yaw).showViewer(context);
+             };
            }
+         },
+         yaw: function yaw(_yaw) {
+           if (typeof _yaw !== 'number') return _yaw;
+           _sceneOptions.yaw = _yaw;
+           return this;
+         },
 
-           selection.append('div').attr('class', 'community-description').html(descriptionHTML);
+         /**
+          * showViewer()
+          */
+         showViewer: function showViewer(context) {
+           var wrap = context.container().select('.photoviewer').classed('hide', false);
+           var isHidden = wrap.selectAll('.photo-wrapper.ms-wrapper.hide').size();
 
-           if (d.extendedDescription || d.languageCodes && d.languageCodes.length) {
-             selection.append('div').call(uiDisclosure(context, "community-more-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.more')).content(showMore));
+           if (isHidden) {
+             wrap.selectAll('.photo-wrapper:not(.ms-wrapper)').classed('hide', true);
+             wrap.selectAll('.photo-wrapper.ms-wrapper').classed('hide', false);
            }
 
-           var nextEvents = (d.events || []).map(function (event) {
-             event.date = parseEventDate(event.when);
-             return event;
-           }).filter(function (event) {
-             // date is valid and future (or today)
-             var t = event.date.getTime();
-             var now = new Date().setHours(0, 0, 0, 0);
-             return !isNaN(t) && t >= now;
-           }).sort(function (a, b) {
-             // sort by date ascending
-             return a.date < b.date ? -1 : a.date > b.date ? 1 : 0;
-           }).slice(0, MAXEVENTS); // limit number of events shown
+           return this;
+         },
 
-           if (nextEvents.length) {
-             selection.append('div').call(uiDisclosure(context, "community-events-".concat(d.id), false).expanded(false).updatePreference(false).label(_t.html('success.events')).content(showNextEvents)).select('.hide-toggle').append('span').attr('class', 'badge-text').html(nextEvents.length);
-           }
+         /**
+          * hideViewer()
+          */
+         hideViewer: function hideViewer(context) {
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(null);
+           viewer.classed('hide', true).selectAll('.photo-wrapper').classed('hide', true);
+           context.container().selectAll('.viewfield-group, .sequence, .icon-sign').classed('currentView', false);
+           this.updateUrlImage(null);
+           return this.setStyles(context, null, true);
+         },
 
-           function showMore(selection) {
-             var more = selection.selectAll('.community-more').data([0]);
-             var moreEnter = more.enter().append('div').attr('class', 'community-more');
+         /**
+          * selectImage().
+          */
+         selectImage: function selectImage(context, key) {
+           var that = this;
+           var d = this.cachedImage(key);
+           var viewer = context.container().select('.photoviewer');
+           if (!viewer.empty()) viewer.datum(d);
+           this.setStyles(context, null, true);
+           var wrap = context.container().select('.photoviewer .ms-wrapper');
+           var attribution = wrap.selectAll('.photo-attribution').html('');
+           wrap.selectAll('.pnlm-load-box') // display "loading.."
+           .style('display', 'block');
+           if (!d) return this;
+           this.updateUrlImage(key);
+           _sceneOptions.northOffset = d.ca;
+           var line1 = attribution.append('div').attr('class', 'attribution-row');
+           var hiresDomId = utilUniqueDomId('streetside-hires'); // Add hires checkbox
 
-             if (d.extendedDescription) {
-               moreEnter.append('div').attr('class', 'community-extended-description').html(_t.html("community.".concat(d.id, ".extendedDescription"), replacements));
-             }
+           var label = line1.append('label').attr('for', hiresDomId).attr('class', 'streetside-hires');
+           label.append('input').attr('type', 'checkbox').attr('id', hiresDomId).property('checked', _hires).on('click', function (d3_event) {
+             d3_event.stopPropagation();
+             _hires = !_hires;
+             _resolution = _hires ? 1024 : 512;
+             wrap.call(setupCanvas, true);
+             var viewstate = {
+               yaw: _pannellumViewer.getYaw(),
+               pitch: _pannellumViewer.getPitch(),
+               hfov: _pannellumViewer.getHfov()
+             };
+             _sceneOptions = Object.assign(_sceneOptions, viewstate);
+             that.selectImage(context, d.key).showViewer(context);
+           });
+           label.append('span').call(_t.append('streetside.hires'));
+           var captureInfo = line1.append('div').attr('class', 'attribution-capture-info'); // Add capture date
 
-             if (d.languageCodes && d.languageCodes.length) {
-               var languageList = d.languageCodes.map(function (code) {
-                 return _mainLocalizer.languageName(code);
-               }).join(', ');
-               moreEnter.append('div').attr('class', 'community-languages').html(_t.html('success.languages', {
-                 languages: languageList
-               }));
-             }
+           if (d.captured_by) {
+             var yyyy = new Date().getFullYear();
+             captureInfo.append('a').attr('class', 'captured_by').attr('target', '_blank').attr('href', 'https://www.microsoft.com/en-us/maps/streetside').text('©' + yyyy + ' Microsoft');
+             captureInfo.append('span').text('|');
            }
 
-           function showNextEvents(selection) {
-             var events = selection.append('div').attr('class', 'community-events');
-             var item = events.selectAll('.community-event').data(nextEvents);
-             var itemEnter = item.enter().append('div').attr('class', 'community-event');
-             itemEnter.append('div').attr('class', 'community-event-name').append('a').attr('target', '_blank').attr('href', function (d) {
-               return d.url;
-             }).html(function (d) {
-               var name = d.name;
-
-               if (d.i18n && d.id) {
-                 name = _t("community.".concat(communityID, ".events.").concat(d.id, ".name"), {
-                   "default": name
-                 });
-               }
-
-               return name;
-             });
-             itemEnter.append('div').attr('class', 'community-event-when').html(function (d) {
-               var options = {
-                 weekday: 'short',
-                 day: 'numeric',
-                 month: 'short',
-                 year: 'numeric'
-               };
+           if (d.captured_at) {
+             captureInfo.append('span').attr('class', 'captured_at').text(localeTimestamp(d.captured_at));
+           } // Add image links
 
-               if (d.date.getHours() || d.date.getMinutes()) {
-                 // include time if it has one
-                 options.hour = 'numeric';
-                 options.minute = 'numeric';
-               }
 
-               return d.date.toLocaleString(_mainLocalizer.localeCode(), options);
-             });
-             itemEnter.append('div').attr('class', 'community-event-where').html(function (d) {
-               var where = d.where;
+           var line2 = attribution.append('div').attr('class', 'attribution-row');
+           line2.append('a').attr('class', 'image-view-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps?cp=' + d.loc[1] + '~' + d.loc[0] + '&lvl=17&dir=' + d.ca + '&style=x&v=2&sV=1').call(_t.append('streetside.view_on_bing'));
+           line2.append('a').attr('class', 'image-report-link').attr('target', '_blank').attr('href', 'https://www.bing.com/maps/privacyreport/streetsideprivacyreport?bubbleid=' + encodeURIComponent(d.key) + '&focus=photo&lat=' + d.loc[1] + '&lng=' + d.loc[0] + '&z=17').call(_t.append('streetside.report'));
+           var bubbleIdQuadKey = d.key.toString(4);
+           var paddingNeeded = 16 - bubbleIdQuadKey.length;
 
-               if (d.i18n && d.id) {
-                 where = _t("community.".concat(communityID, ".events.").concat(d.id, ".where"), {
-                   "default": where
-                 });
-               }
+           for (var i = 0; i < paddingNeeded; i++) {
+             bubbleIdQuadKey = '0' + bubbleIdQuadKey;
+           }
 
-               return where;
-             });
-             itemEnter.append('div').attr('class', 'community-event-description').html(function (d) {
-               var description = d.description;
+           var imgUrlPrefix = streetsideImagesApi + 'hs' + bubbleIdQuadKey;
+           var imgUrlSuffix = '.jpg?g=6338&n=z'; // Cubemap face code order matters here: front=01, right=02, back=03, left=10, up=11, down=12
 
-               if (d.i18n && d.id) {
-                 description = _t("community.".concat(communityID, ".events.").concat(d.id, ".description"), {
-                   "default": description
-                 });
-               }
+           var faceKeys = ['01', '02', '03', '10', '11', '12']; // Map images to cube faces
 
-               return description;
+           var quadKeys = getQuadKeys();
+           var faces = faceKeys.map(function (faceKey) {
+             return quadKeys.map(function (quadKey) {
+               var xy = qkToXY(quadKey);
+               return {
+                 face: faceKey,
+                 url: imgUrlPrefix + faceKey + quadKey + imgUrlSuffix,
+                 x: xy[0],
+                 y: xy[1]
+               };
              });
-           }
-
-           function linkify(url, text) {
-             text = text || url;
-             return "<a target=\"_blank\" href=\"".concat(url, "\">").concat(text, "</a>");
-           }
-         }
+           });
+           loadFaces(faces).then(function () {
+             if (!_pannellumViewer) {
+               that.initViewer();
+             } else {
+               // make a new scene
+               _currScene += 1;
 
-         success.changeset = function (val) {
-           if (!arguments.length) return _changeset;
-           _changeset = val;
-           return success;
-         };
+               var sceneID = _currScene.toString();
 
-         success.location = function (val) {
-           if (!arguments.length) return _location;
-           _location = val;
-           return success;
-         };
+               _pannellumViewer.addScene(sceneID, _sceneOptions).loadScene(sceneID); // remove previous scene
 
-         return utilRebind(success, dispatch$1, 'on');
-       }
 
-       function modeSave(context) {
-         var mode = {
-           id: 'save'
-         };
-         var keybinding = utilKeybinding('modeSave');
-         var commit = uiCommit(context).on('cancel', cancel);
+               if (_currScene > 2) {
+                 sceneID = (_currScene - 1).toString();
 
-         var _conflictsUi; // uiConflicts
+                 _pannellumViewer.removeScene(sceneID);
+               }
+             }
+           });
+           return this;
+         },
+         getSequenceKeyForBubble: function getSequenceKeyForBubble(d) {
+           return d && d.sequenceKey;
+         },
+         // Updates the currently highlighted sequence and selected bubble.
+         // Reset is only necessary when interacting with the viewport because
+         // this implicitly changes the currently selected bubble/sequence
+         setStyles: function setStyles(context, hovered, reset) {
+           if (reset) {
+             // reset all layers
+             context.container().selectAll('.viewfield-group').classed('highlighted', false).classed('hovered', false).classed('currentView', false);
+             context.container().selectAll('.sequence').classed('highlighted', false).classed('currentView', false);
+           }
 
+           var hoveredBubbleKey = hovered && hovered.key;
+           var hoveredSequenceKey = this.getSequenceKeyForBubble(hovered);
+           var hoveredSequence = hoveredSequenceKey && _ssCache.sequences[hoveredSequenceKey];
+           var hoveredBubbleKeys = hoveredSequence && hoveredSequence.bubbles.map(function (d) {
+             return d.key;
+           }) || [];
+           var viewer = context.container().select('.photoviewer');
+           var selected = viewer.empty() ? undefined : viewer.datum();
+           var selectedBubbleKey = selected && selected.key;
+           var selectedSequenceKey = this.getSequenceKeyForBubble(selected);
+           var selectedSequence = selectedSequenceKey && _ssCache.sequences[selectedSequenceKey];
+           var selectedBubbleKeys = selectedSequence && selectedSequence.bubbles.map(function (d) {
+             return d.key;
+           }) || []; // highlight sibling viewfields on either the selected or the hovered sequences
 
-         var _location;
+           var highlightedBubbleKeys = utilArrayUnion(hoveredBubbleKeys, selectedBubbleKeys);
+           context.container().selectAll('.layer-streetside-images .viewfield-group').classed('highlighted', function (d) {
+             return highlightedBubbleKeys.indexOf(d.key) !== -1;
+           }).classed('hovered', function (d) {
+             return d.key === hoveredBubbleKey;
+           }).classed('currentView', function (d) {
+             return d.key === selectedBubbleKey;
+           });
+           context.container().selectAll('.layer-streetside-images .sequence').classed('highlighted', function (d) {
+             return d.properties.key === hoveredSequenceKey;
+           }).classed('currentView', function (d) {
+             return d.properties.key === selectedSequenceKey;
+           }); // update viewfields if needed
 
-         var _success;
+           context.container().selectAll('.layer-streetside-images .viewfield-group .viewfield').attr('d', viewfieldPath);
 
-         var uploader = context.uploader().on('saveStarted.modeSave', function () {
-           keybindingOff();
-         }) // fire off some async work that we want to be ready later
-         .on('willAttemptUpload.modeSave', prepareForSuccess).on('progressChanged.modeSave', showProgress).on('resultNoChanges.modeSave', function () {
-           cancel();
-         }).on('resultErrors.modeSave', showErrors).on('resultConflicts.modeSave', showConflicts).on('resultSuccess.modeSave', showSuccess);
+           function viewfieldPath() {
+             var d = this.parentNode.__data__;
 
-         function cancel() {
-           context.enter(modeBrowse(context));
-         }
+             if (d.pano && d.key !== selectedBubbleKey) {
+               return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
+             } else {
+               return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
+             }
+           }
 
-         function showProgress(num, total) {
-           var modal = context.container().select('.loading-modal .modal-section');
-           var progress = modal.selectAll('.progress').data([0]); // enter/update
+           return this;
+         },
+         updateUrlImage: function updateUrlImage(imageKey) {
+           if (!window.mocha) {
+             var hash = utilStringQs(window.location.hash);
 
-           progress.enter().append('div').attr('class', 'progress').merge(progress).text(_t('save.conflict_progress', {
-             num: num,
-             total: total
-           }));
-         }
+             if (imageKey) {
+               hash.photo = 'streetside/' + imageKey;
+             } else {
+               delete hash.photo;
+             }
 
-         function showConflicts(changeset, conflicts, origChanges) {
-           var selection = context.container().select('.sidebar').append('div').attr('class', 'sidebar-component');
-           context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
-           _conflictsUi = uiConflicts(context).conflictList(conflicts).origChanges(origChanges).on('cancel', function () {
-             context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
-             selection.remove();
-             keybindingOn();
-             uploader.cancelConflictResolution();
-           }).on('save', function () {
-             context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
-             selection.remove();
-             uploader.processResolvedConflicts(changeset);
-           });
-           selection.call(_conflictsUi);
-         }
+             window.location.replace('#' + utilQsString(hash, true));
+           }
+         },
 
-         function showErrors(errors) {
-           keybindingOn();
-           var selection = uiConfirm(context.container());
-           selection.select('.modal-section.header').append('h3').text(_t('save.error'));
-           addErrors(selection, errors);
-           selection.okButton();
+         /**
+          * cache().
+          */
+         cache: function cache() {
+           return _ssCache;
          }
+       };
 
-         function addErrors(selection, data) {
-           var message = selection.select('.modal-section.message-text');
-           var items = message.selectAll('.error-container').data(data);
-           var enter = items.enter().append('div').attr('class', 'error-container');
-           enter.append('a').attr('class', 'error-description').attr('href', '#').classed('hide-toggle', true).text(function (d) {
-             return d.msg || _t('save.unknown_error_details');
-           }).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             var error = select(this);
-             var detail = select(this.nextElementSibling);
-             var exp = error.classed('expanded');
-             detail.style('display', exp ? 'none' : 'block');
-             error.classed('expanded', !exp);
-           });
-           var details = enter.append('div').attr('class', 'error-detail-container').style('display', 'none');
-           details.append('ul').attr('class', 'error-detail-list').selectAll('li').data(function (d) {
-             return d.details || [];
-           }).enter().append('li').attr('class', 'error-detail-item').text(function (d) {
-             return d;
-           });
-           items.exit().remove();
-         }
+       var _apibase = 'https://taginfo.openstreetmap.org/api/4/';
+       var _inflight = {};
+       var _popularKeys = {};
+       var _taginfoCache = {};
+       var tag_sorts = {
+         point: 'count_nodes',
+         vertex: 'count_nodes',
+         area: 'count_ways',
+         line: 'count_ways'
+       };
+       var tag_sort_members = {
+         point: 'count_node_members',
+         vertex: 'count_node_members',
+         area: 'count_way_members',
+         line: 'count_way_members',
+         relation: 'count_relation_members'
+       };
+       var tag_filters = {
+         point: 'nodes',
+         vertex: 'nodes',
+         area: 'ways',
+         line: 'ways'
+       };
+       var tag_members_fractions = {
+         point: 'count_node_members_fraction',
+         vertex: 'count_node_members_fraction',
+         area: 'count_way_members_fraction',
+         line: 'count_way_members_fraction',
+         relation: 'count_relation_members_fraction'
+       };
 
-         function showSuccess(changeset) {
-           commit.reset();
+       function sets(params, n, o) {
+         if (params.geometry && o[params.geometry]) {
+           params[n] = o[params.geometry];
+         }
 
-           var ui = _success.changeset(changeset).location(_location).on('cancel', function () {
-             context.ui().sidebar.hide();
-           });
+         return params;
+       }
 
-           context.enter(modeBrowse(context).sidebar(ui));
-         }
+       function setFilter(params) {
+         return sets(params, 'filter', tag_filters);
+       }
 
-         function keybindingOn() {
-           select(document).call(keybinding.on('⎋', cancel, true));
-         }
+       function setSort(params) {
+         return sets(params, 'sortname', tag_sorts);
+       }
 
-         function keybindingOff() {
-           select(document).call(keybinding.unbind);
-         } // Reverse geocode current map location so we can display a message on
-         // the success screen like "Thank you for editing around place, region."
+       function setSortMembers(params) {
+         return sets(params, 'sortname', tag_sort_members);
+       }
 
+       function clean(params) {
+         return utilObjectOmit(params, ['geometry', 'debounce']);
+       }
 
-         function prepareForSuccess() {
-           _success = uiSuccess(context);
-           _location = null;
-           if (!services.geocoder) return;
-           services.geocoder.reverse(context.map().center(), function (err, result) {
-             if (err || !result || !result.address) return;
-             var addr = result.address;
-             var place = addr && (addr.town || addr.city || addr.county) || '';
-             var region = addr && (addr.state || addr.country) || '';
-             var separator = place && region ? _t('success.thank_you_where.separator') : '';
-             _location = _t('success.thank_you_where.format', {
-               place: place,
-               separator: separator,
-               region: region
-             });
-           });
-         }
+       function filterKeys(type) {
+         var count_type = type ? 'count_' + type : 'count_all';
+         return function (d) {
+           return parseFloat(d[count_type]) > 2500 || d.in_wiki;
+         };
+       }
 
-         mode.selectedIDs = function () {
-           return _conflictsUi ? _conflictsUi.shownEntityIds() : [];
+       function filterMultikeys(prefix) {
+         return function (d) {
+           // d.key begins with prefix, and d.key contains no additional ':'s
+           var re = new RegExp('^' + prefix + '(.*)$');
+           var matches = d.key.match(re) || [];
+           return matches.length === 2 && matches[1].indexOf(':') === -1;
          };
+       }
 
-         mode.enter = function () {
-           // Show sidebar
-           context.ui().sidebar.expand();
+       function filterValues(allowUpperCase) {
+         return function (d) {
+           if (d.value.match(/[;,]/) !== null) return false; // exclude some punctuation
 
-           function done() {
-             context.ui().sidebar.show(commit);
-           }
+           if (!allowUpperCase && d.value.match(/[A-Z*]/) !== null) return false; // exclude uppercase letters
 
-           keybindingOn();
-           context.container().selectAll('.main-content').classed('active', false).classed('inactive', true);
-           var osm = context.connection();
+           return parseFloat(d.fraction) > 0.0;
+         };
+       }
 
-           if (!osm) {
-             cancel();
-             return;
-           }
+       function filterRoles(geometry) {
+         return function (d) {
+           if (d.role === '') return false; // exclude empty role
 
-           if (osm.authenticated()) {
-             done();
-           } else {
-             osm.authenticate(function (err) {
-               if (err) {
-                 cancel();
-               } else {
-                 done();
-               }
-             });
-           }
-         };
+           if (d.role.match(/[A-Z*;,]/) !== null) return false; // exclude uppercase letters and some punctuation
 
-         mode.exit = function () {
-           keybindingOff();
-           context.container().selectAll('.main-content').classed('active', true).classed('inactive', false);
-           context.ui().sidebar.hide();
+           return parseFloat(d[tag_members_fractions[geometry]]) > 0.0;
          };
-
-         return mode;
        }
 
-       function uiToolOldDrawModes(context) {
-         var tool = {
-           id: 'old_modes',
-           label: _t.html('toolbar.add_feature')
+       function valKey(d) {
+         return {
+           value: d.key,
+           title: d.key
          };
-         var modes = [modeAddPoint(context, {
-           title: _t.html('modes.add_point.title'),
-           button: 'point',
-           description: _t.html('modes.add_point.description'),
-           preset: _mainPresetIndex.item('point'),
-           key: '1'
-         }), modeAddLine(context, {
-           title: _t.html('modes.add_line.title'),
-           button: 'line',
-           description: _t.html('modes.add_line.description'),
-           preset: _mainPresetIndex.item('line'),
-           key: '2'
-         }), modeAddArea(context, {
-           title: _t.html('modes.add_area.title'),
-           button: 'area',
-           description: _t.html('modes.add_area.description'),
-           preset: _mainPresetIndex.item('area'),
-           key: '3'
-         })];
+       }
 
-         function enabled() {
-           return osmEditable();
-         }
+       function valKeyDescription(d) {
+         var obj = {
+           value: d.value,
+           title: d.description || d.value
+         };
 
-         function osmEditable() {
-           return context.editable();
+         if (d.count) {
+           obj.count = d.count;
          }
 
-         modes.forEach(function (mode) {
-           context.keybinding().on(mode.key, function () {
-             if (!enabled()) return;
-
-             if (mode.id === context.mode().id) {
-               context.enter(modeBrowse(context));
-             } else {
-               context.enter(mode);
-             }
-           });
-         });
+         return obj;
+       }
 
-         tool.render = function (selection) {
-           var wrap = selection.append('div').attr('class', 'joined').style('display', 'flex');
+       function roleKey(d) {
+         return {
+           value: d.role,
+           title: d.role
+         };
+       } // sort keys with ':' lower than keys without ':'
 
-           var debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
 
-           context.map().on('move.modes', debouncedUpdate).on('drawn.modes', debouncedUpdate);
-           context.on('enter.modes', update);
-           update();
+       function sortKeys(a, b) {
+         return a.key.indexOf(':') === -1 && b.key.indexOf(':') !== -1 ? -1 : a.key.indexOf(':') !== -1 && b.key.indexOf(':') === -1 ? 1 : 0;
+       }
 
-           function update() {
-             var buttons = wrap.selectAll('button.add-button').data(modes, function (d) {
-               return d.id;
-             }); // exit
+       var debouncedRequest = debounce(request, 300, {
+         leading: false
+       });
 
-             buttons.exit().remove(); // enter
+       function request(url, params, exactMatch, callback, loaded) {
+         if (_inflight[url]) return;
+         if (checkCache(url, params, exactMatch, callback)) return;
+         var controller = new AbortController();
+         _inflight[url] = controller;
+         d3_json(url, {
+           signal: controller.signal
+         }).then(function (result) {
+           delete _inflight[url];
+           if (loaded) loaded(null, result);
+         })["catch"](function (err) {
+           delete _inflight[url];
+           if (err.name === 'AbortError') return;
+           if (loaded) loaded(err.message);
+         });
+       }
 
-             var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
-               return d.id + ' add-button bar-button';
-             }).on('click.mode-buttons', function (d3_event, d) {
-               if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
+       function checkCache(url, params, exactMatch, callback) {
+         var rp = params.rp || 25;
+         var testQuery = params.query || '';
+         var testUrl = url;
 
-               var currMode = context.mode().id;
-               if (/^draw/.test(currMode)) return;
+         do {
+           var hit = _taginfoCache[testUrl]; // exact match, or shorter match yielding fewer than max results (rp)
 
-               if (d.id === currMode) {
-                 context.enter(modeBrowse(context));
-               } else {
-                 context.enter(d);
-               }
-             }).call(uiTooltip().placement('bottom').title(function (d) {
-               return d.description;
-             }).keys(function (d) {
-               return [d.key];
-             }).scrollContainer(context.container().select('.top-toolbar')));
-             buttonsEnter.each(function (d) {
-               select(this).call(svgIcon('#iD-icon-' + d.button));
-             });
-             buttonsEnter.append('span').attr('class', 'label').html(function (mode) {
-               return mode.title;
-             }); // if we are adding/removing the buttons, check if toolbar has overflowed
+           if (hit && (url === testUrl || hit.length < rp)) {
+             callback(null, hit);
+             return true;
+           } // don't try to shorten the query
 
-             if (buttons.enter().size() || buttons.exit().size()) {
-               context.ui().checkOverflow('.top-toolbar', true);
-             } // update
 
+           if (exactMatch || !testQuery.length) return false; // do shorten the query to see if we already have a cached result
+           // that has returned fewer than max results (rp)
 
-             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
-               return !enabled();
-             }).classed('active', function (d) {
-               return context.mode() && context.mode().button === d.button;
-             });
-           }
-         };
+           testQuery = testQuery.slice(0, -1);
+           testUrl = url.replace(/&query=(.*?)&/, '&query=' + testQuery + '&');
+         } while (testQuery.length >= 0);
 
-         return tool;
+         return false;
        }
 
-       function uiToolNotes(context) {
-         var tool = {
-           id: 'notes',
-           label: _t.html('modes.add_note.label')
-         };
-         var mode = modeAddNote(context);
+       var serviceTaginfo = {
+         init: function init() {
+           _inflight = {};
+           _taginfoCache = {};
+           _popularKeys = {
+             // manually exclude some keys – #5377, #7485
+             postal_code: true,
+             full_name: true,
+             loc_name: true,
+             reg_name: true,
+             short_name: true,
+             sorting_name: true,
+             artist_name: true,
+             nat_name: true,
+             long_name: true,
+             'bridge:name': true
+           }; // Fetch popular keys.  We'll exclude these from `values`
+           // lookups because they stress taginfo, and they aren't likely
+           // to yield meaningful autocomplete results.. see #3955
 
-         function enabled() {
-           return notesEnabled() && notesEditable();
-         }
+           var params = {
+             rp: 100,
+             sortname: 'values_all',
+             sortorder: 'desc',
+             page: 1,
+             debounce: false,
+             lang: _mainLocalizer.languageCode()
+           };
+           this.keys(params, function (err, data) {
+             if (err) return;
+             data.forEach(function (d) {
+               if (d.value === 'opening_hours') return; // exception
 
-         function notesEnabled() {
-           var noteLayer = context.layers().layer('notes');
-           return noteLayer && noteLayer.enabled();
-         }
+               _popularKeys[d.value] = true;
+             });
+           });
+         },
+         reset: function reset() {
+           Object.values(_inflight).forEach(function (controller) {
+             controller.abort();
+           });
+           _inflight = {};
+         },
+         keys: function keys(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(params));
+           params = Object.assign({
+             rp: 10,
+             sortname: 'count_all',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var url = _apibase + 'keys/all?' + utilQsString(params);
+           doRequest(url, params, false, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               var f = filterKeys(params.filter);
+               var result = d.data.filter(f).sort(sortKeys).map(valKey);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         multikeys: function multikeys(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(params));
+           params = Object.assign({
+             rp: 25,
+             sortname: 'count_all',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var prefix = params.query;
+           var url = _apibase + 'keys/all?' + utilQsString(params);
+           doRequest(url, params, true, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               var f = filterMultikeys(prefix);
+               var result = d.data.filter(f).map(valKey);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         values: function values(params, callback) {
+           // Exclude popular keys from values lookups.. see #3955
+           var key = params.key;
 
-         function notesEditable() {
-           var mode = context.mode();
-           return context.map().notesEditable() && mode && mode.id !== 'save';
-         }
+           if (key && _popularKeys[key]) {
+             callback(null, []);
+             return;
+           }
 
-         context.keybinding().on(mode.key, function () {
-           if (!enabled()) return;
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(setFilter(params)));
+           params = Object.assign({
+             rp: 25,
+             sortname: 'count_all',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var url = _apibase + 'key/values?' + utilQsString(params);
+           doRequest(url, params, false, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               // In most cases we prefer taginfo value results with lowercase letters.
+               // A few OSM keys expect values to contain uppercase values (see #3377).
+               // This is not an exhaustive list (e.g. `name` also has uppercase values)
+               // but these are the fields where taginfo value lookup is most useful.
+               var re = /network|taxon|genus|species|brand|grape_variety|royal_cypher|listed_status|booth|rating|stars|:output|_hours|_times|_ref|manufacturer|country|target|brewery|cai_scale/;
+               var allowUpperCase = re.test(params.key);
+               var f = filterValues(allowUpperCase);
+               var result = d.data.filter(f).map(valKeyDescription);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         roles: function roles(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           var geometry = params.geometry;
+           params = clean(setSortMembers(params));
+           params = Object.assign({
+             rp: 25,
+             sortname: 'count_all_members',
+             sortorder: 'desc',
+             page: 1,
+             lang: _mainLocalizer.languageCode()
+           }, params);
+           var url = _apibase + 'relation/roles?' + utilQsString(params);
+           doRequest(url, params, true, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               var f = filterRoles(geometry);
+               var result = d.data.filter(f).map(roleKey);
+               _taginfoCache[url] = result;
+               callback(null, result);
+             }
+           });
+         },
+         docs: function docs(params, callback) {
+           var doRequest = params.debounce ? debouncedRequest : request;
+           params = clean(setSort(params));
+           var path = 'key/wiki_pages?';
 
-           if (mode.id === context.mode().id) {
-             context.enter(modeBrowse(context));
-           } else {
-             context.enter(mode);
+           if (params.value) {
+             path = 'tag/wiki_pages?';
+           } else if (params.rtype) {
+             path = 'relation/wiki_pages?';
            }
-         });
 
-         tool.render = function (selection) {
-           var debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
+           var url = _apibase + path + utilQsString(params);
+           doRequest(url, params, true, callback, function (err, d) {
+             if (err) {
+               callback(err);
+             } else {
+               _taginfoCache[url] = d.data;
+               callback(null, d.data);
+             }
            });
+         },
+         apibase: function apibase(_) {
+           if (!arguments.length) return _apibase;
+           _apibase = _;
+           return this;
+         }
+       };
 
-           context.map().on('move.notes', debouncedUpdate).on('drawn.notes', debouncedUpdate);
-           context.on('enter.notes', update);
-           update();
+       /**
+        * Wraps a GeoJSON {@link Geometry} in a GeoJSON {@link Feature}.
+        *
+        * @name feature
+        * @param {Geometry} geometry input geometry
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature} a GeoJSON Feature
+        * @example
+        * var geometry = {
+        *   "type": "Point",
+        *   "coordinates": [110, 50]
+        * };
+        *
+        * var feature = turf.feature(geometry);
+        *
+        * //=feature
+        */
 
-           function update() {
-             var showNotes = notesEnabled();
-             var data = showNotes ? [mode] : [];
-             var buttons = selection.selectAll('button.add-button').data(data, function (d) {
-               return d.id;
-             }); // exit
+       function feature(geom, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
 
-             buttons.exit().remove(); // enter
+         var feat = {
+           type: "Feature"
+         };
 
-             var buttonsEnter = buttons.enter().append('button').attr('class', function (d) {
-               return d.id + ' add-button bar-button';
-             }).on('click.notes', function (d3_event, d) {
-               if (!enabled()) return; // When drawing, ignore accidental clicks on mode buttons - #4042
+         if (options.id === 0 || options.id) {
+           feat.id = options.id;
+         }
 
-               var currMode = context.mode().id;
-               if (/^draw/.test(currMode)) return;
+         if (options.bbox) {
+           feat.bbox = options.bbox;
+         }
 
-               if (d.id === currMode) {
-                 context.enter(modeBrowse(context));
-               } else {
-                 context.enter(d);
-               }
-             }).call(uiTooltip().placement('bottom').title(function (d) {
-               return d.description;
-             }).keys(function (d) {
-               return [d.key];
-             }).scrollContainer(context.container().select('.top-toolbar')));
-             buttonsEnter.each(function (d) {
-               select(this).call(svgIcon(d.icon || '#iD-icon-' + d.button));
-             }); // if we are adding/removing the buttons, check if toolbar has overflowed
+         feat.properties = properties || {};
+         feat.geometry = geom;
+         return feat;
+       }
+       /**
+        * Creates a {@link Polygon} {@link Feature} from an Array of LinearRings.
+        *
+        * @name polygon
+        * @param {Array<Array<Array<number>>>} coordinates an array of LinearRings
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<Polygon>} Polygon Feature
+        * @example
+        * var polygon = turf.polygon([[[-5, 52], [-4, 56], [-2, 51], [-7, 54], [-5, 52]]], { name: 'poly1' });
+        *
+        * //=polygon
+        */
 
-             if (buttons.enter().size() || buttons.exit().size()) {
-               context.ui().checkOverflow('.top-toolbar', true);
-             } // update
+       function polygon(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
+         }
 
+         for (var _i = 0, coordinates_1 = coordinates; _i < coordinates_1.length; _i++) {
+           var ring = coordinates_1[_i];
 
-             buttons = buttons.merge(buttonsEnter).classed('disabled', function (d) {
-               return !enabled();
-             }).classed('active', function (d) {
-               return context.mode() && context.mode().button === d.button;
-             });
+           if (ring.length < 4) {
+             throw new Error("Each LinearRing of a Polygon must have 4 or more Positions.");
            }
-         };
-
-         tool.uninstall = function () {
-           context.on('enter.editor.notes', null).on('exit.editor.notes', null).on('enter.notes', null);
-           context.map().on('move.notes', null).on('drawn.notes', null);
-         };
 
-         return tool;
-       }
+           for (var j = 0; j < ring[ring.length - 1].length; j++) {
+             // Check if first point of Polygon contains two numbers
+             if (ring[ring.length - 1][j] !== ring[0][j]) {
+               throw new Error("First and last Position are not equivalent.");
+             }
+           }
+         }
 
-       function uiToolSave(context) {
-         var tool = {
-           id: 'save',
-           label: _t.html('save.title')
+         var geom = {
+           type: "Polygon",
+           coordinates: coordinates
          };
-         var button = null;
-         var tooltipBehavior = null;
-         var history = context.history();
-         var key = uiCmd('⌘S');
-         var _numChanges = 0;
+         return feature(geom, properties, options);
+       }
+       /**
+        * Creates a {@link LineString} {@link Feature} from an Array of Positions.
+        *
+        * @name lineString
+        * @param {Array<Array<number>>} coordinates an array of Positions
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<LineString>} LineString Feature
+        * @example
+        * var linestring1 = turf.lineString([[-24, 63], [-23, 60], [-25, 65], [-20, 69]], {name: 'line 1'});
+        * var linestring2 = turf.lineString([[-14, 43], [-13, 40], [-15, 45], [-10, 49]], {name: 'line 2'});
+        *
+        * //=linestring1
+        * //=linestring2
+        */
 
-         function isSaving() {
-           var mode = context.mode();
-           return mode && mode.id === 'save';
+       function lineString(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
          }
 
-         function isDisabled() {
-           return _numChanges === 0 || isSaving();
+         if (coordinates.length < 2) {
+           throw new Error("coordinates must be an array of two or more positions");
          }
 
-         function save(d3_event) {
-           d3_event.preventDefault();
+         var geom = {
+           type: "LineString",
+           coordinates: coordinates
+         };
+         return feature(geom, properties, options);
+       }
+       /**
+        * Creates a {@link Feature<MultiLineString>} based on a
+        * coordinate array. Properties can be added optionally.
+        *
+        * @name multiLineString
+        * @param {Array<Array<Array<number>>>} coordinates an array of LineStrings
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<MultiLineString>} a MultiLineString feature
+        * @throws {Error} if no coordinates are passed
+        * @example
+        * var multiLine = turf.multiLineString([[[0,0],[10,10]]]);
+        *
+        * //=multiLine
+        */
 
-           if (!context.inIntro() && !isSaving() && history.hasChanges()) {
-             context.enter(modeSave(context));
-           }
+       function multiLineString(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
          }
 
-         function bgColor() {
-           var step;
+         var geom = {
+           type: "MultiLineString",
+           coordinates: coordinates
+         };
+         return feature(geom, properties, options);
+       }
+       /**
+        * Creates a {@link Feature<MultiPolygon>} based on a
+        * coordinate array. Properties can be added optionally.
+        *
+        * @name multiPolygon
+        * @param {Array<Array<Array<Array<number>>>>} coordinates an array of Polygons
+        * @param {Object} [properties={}] an Object of key-value pairs to add as properties
+        * @param {Object} [options={}] Optional Parameters
+        * @param {Array<number>} [options.bbox] Bounding Box Array [west, south, east, north] associated with the Feature
+        * @param {string|number} [options.id] Identifier associated with the Feature
+        * @returns {Feature<MultiPolygon>} a multipolygon feature
+        * @throws {Error} if no coordinates are passed
+        * @example
+        * var multiPoly = turf.multiPolygon([[[[0,0],[0,10],[10,10],[10,0],[0,0]]]]);
+        *
+        * //=multiPoly
+        *
+        */
 
-           if (_numChanges === 0) {
-             return null;
-           } else if (_numChanges <= 50) {
-             step = _numChanges / 50;
-             return d3_interpolateRgb('#fff', '#ff8')(step); // white -> yellow
-           } else {
-             step = Math.min((_numChanges - 50) / 50, 1.0);
-             return d3_interpolateRgb('#ff8', '#f88')(step); // yellow -> red
-           }
+       function multiPolygon(coordinates, properties, options) {
+         if (options === void 0) {
+           options = {};
          }
 
-         function updateCount() {
-           var val = history.difference().summary().length;
-           if (val === _numChanges) return;
-           _numChanges = val;
+         var geom = {
+           type: "MultiPolygon",
+           coordinates: coordinates
+         };
+         return feature(geom, properties, options);
+       }
 
-           if (tooltipBehavior) {
-             tooltipBehavior.title(_t.html(_numChanges > 0 ? 'save.help' : 'save.no_changes')).keys([key]);
-           }
+       /**
+        * Get Geometry from Feature or Geometry Object
+        *
+        * @param {Feature|Geometry} geojson GeoJSON Feature or Geometry Object
+        * @returns {Geometry|null} GeoJSON Geometry Object
+        * @throws {Error} if geojson is not a Feature or Geometry Object
+        * @example
+        * var point = {
+        *   "type": "Feature",
+        *   "properties": {},
+        *   "geometry": {
+        *     "type": "Point",
+        *     "coordinates": [110, 40]
+        *   }
+        * }
+        * var geom = turf.getGeom(point)
+        * //={"type": "Point", "coordinates": [110, 40]}
+        */
 
-           if (button) {
-             button.classed('disabled', isDisabled()).style('background', bgColor());
-             button.select('span.count').html(_numChanges);
-           }
+       function getGeom(geojson) {
+         if (geojson.type === "Feature") {
+           return geojson.geometry;
          }
 
-         tool.render = function (selection) {
-           tooltipBehavior = uiTooltip().placement('bottom').title(_t.html('save.no_changes')).keys([key]).scrollContainer(context.container().select('.top-toolbar'));
-           var lastPointerUpType;
-           button = selection.append('button').attr('class', 'save disabled bar-button').on('pointerup', function (d3_event) {
-             lastPointerUpType = d3_event.pointerType;
-           }).on('click', function (d3_event) {
-             save(d3_event);
+         return geojson;
+       }
 
-             if (_numChanges === 0 && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
-               // there are no tooltips for touch interactions so flash feedback instead
-               context.ui().flash.duration(2000).iconName('#iD-icon-save').iconClass('disabled').label(_t.html('save.no_changes'))();
-             }
+       // Cohen-Sutherland line clipping algorithm, adapted to efficiently
+       // handle polylines rather than just segments
+       function lineclip(points, bbox, result) {
+         var len = points.length,
+             codeA = bitCode(points[0], bbox),
+             part = [],
+             i,
+             codeB,
+             lastCode;
+         var a;
+         var b;
+         if (!result) result = [];
 
-             lastPointerUpType = null;
-           }).call(tooltipBehavior);
-           button.call(svgIcon('#iD-icon-save'));
-           button.append('span').attr('class', 'count').attr('aria-hidden', 'true').html('0');
-           updateCount();
-           context.keybinding().on(key, save, true);
-           context.history().on('change.save', updateCount);
-           context.on('enter.save', function () {
-             if (button) {
-               button.classed('disabled', isDisabled());
+         for (i = 1; i < len; i++) {
+           a = points[i - 1];
+           b = points[i];
+           codeB = lastCode = bitCode(b, bbox);
 
-               if (isSaving()) {
-                 button.call(tooltipBehavior.hide);
+           while (true) {
+             if (!(codeA | codeB)) {
+               // accept
+               part.push(a);
+
+               if (codeB !== lastCode) {
+                 // segment went outside
+                 part.push(b);
+
+                 if (i < len - 1) {
+                   // start a new line
+                   result.push(part);
+                   part = [];
+                 }
+               } else if (i === len - 1) {
+                 part.push(b);
                }
+
+               break;
+             } else if (codeA & codeB) {
+               // trivial reject
+               break;
+             } else if (codeA) {
+               // a outside, intersect with clip edge
+               a = intersect(a, b, codeA, bbox);
+               codeA = bitCode(a, bbox);
+             } else {
+               // b outside
+               b = intersect(a, b, codeB, bbox);
+               codeB = bitCode(b, bbox);
              }
-           });
-         };
+           }
 
-         tool.uninstall = function () {
-           context.keybinding().off(key, true);
-           context.history().on('change.save', null);
-           context.on('enter.save', null);
-           button = null;
-           tooltipBehavior = null;
-         };
+           codeA = lastCode;
+         }
 
-         return tool;
-       }
+         if (part.length) result.push(part);
+         return result;
+       } // Sutherland-Hodgeman polygon clipping algorithm
 
-       function uiToolSidebarToggle(context) {
-         var tool = {
-           id: 'sidebar_toggle',
-           label: _t.html('toolbar.inspect')
-         };
+       function polygonclip(points, bbox) {
+         var result, edge, prev, prevInside, i, p, inside; // clip against each side of the clip rectangle
 
-         tool.render = function (selection) {
-           selection.append('button').attr('class', 'bar-button').on('click', function () {
-             context.ui().sidebar.toggle();
-           }).call(uiTooltip().placement('bottom').title(_t.html('sidebar.tooltip')).keys([_t('sidebar.key')]).scrollContainer(context.container().select('.top-toolbar'))).call(svgIcon('#iD-icon-sidebar-' + (_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')));
-         };
+         for (edge = 1; edge <= 8; edge *= 2) {
+           result = [];
+           prev = points[points.length - 1];
+           prevInside = !(bitCode(prev, bbox) & edge);
 
-         return tool;
-       }
+           for (i = 0; i < points.length; i++) {
+             p = points[i];
+             inside = !(bitCode(p, bbox) & edge); // if segment goes through the clip window, add an intersection
 
-       function uiToolUndoRedo(context) {
-         var tool = {
-           id: 'undo_redo',
-           label: _t.html('toolbar.undo_redo')
-         };
-         var commands = [{
-           id: 'undo',
-           cmd: uiCmd('⌘Z'),
-           action: function action() {
-             context.undo();
-           },
-           annotation: function annotation() {
-             return context.history().undoAnnotation();
-           },
-           icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')
-         }, {
-           id: 'redo',
-           cmd: uiCmd('⌘⇧Z'),
-           action: function action() {
-             context.redo();
-           },
-           annotation: function annotation() {
-             return context.history().redoAnnotation();
-           },
-           icon: 'iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'undo' : 'redo')
-         }];
+             if (inside !== prevInside) result.push(intersect(prev, p, edge, bbox));
+             if (inside) result.push(p); // add a point if it's inside
 
-         function editable() {
-           return context.mode() && context.mode().id !== 'save' && context.map().editableDataEnabled(true
-           /* ignore min zoom */
-           );
+             prev = p;
+             prevInside = inside;
+           }
+
+           points = result;
+           if (!points.length) break;
          }
 
-         tool.render = function (selection) {
-           var tooltipBehavior = uiTooltip().placement('bottom').title(function (d) {
-             return d.annotation() ? _t.html(d.id + '.tooltip', {
-               action: d.annotation()
-             }) : _t.html(d.id + '.nothing');
-           }).keys(function (d) {
-             return [d.cmd];
-           }).scrollContainer(context.container().select('.top-toolbar'));
-           var lastPointerUpType;
-           var buttons = selection.selectAll('button').data(commands).enter().append('button').attr('class', function (d) {
-             return 'disabled ' + d.id + '-button bar-button';
-           }).on('pointerup', function (d3_event) {
-             // `pointerup` is always called before `click`
-             lastPointerUpType = d3_event.pointerType;
-           }).on('click', function (d3_event, d) {
-             d3_event.preventDefault();
-             var annotation = d.annotation();
+         return result;
+       } // intersect a segment against one of the 4 lines that make up the bbox
 
-             if (editable() && annotation) {
-               d.action();
-             }
+       function intersect(a, b, edge, bbox) {
+         return edge & 8 ? [a[0] + (b[0] - a[0]) * (bbox[3] - a[1]) / (b[1] - a[1]), bbox[3]] // top
+         : edge & 4 ? [a[0] + (b[0] - a[0]) * (bbox[1] - a[1]) / (b[1] - a[1]), bbox[1]] // bottom
+         : edge & 2 ? [bbox[2], a[1] + (b[1] - a[1]) * (bbox[2] - a[0]) / (b[0] - a[0])] // right
+         : edge & 1 ? [bbox[0], a[1] + (b[1] - a[1]) * (bbox[0] - a[0]) / (b[0] - a[0])] // left
+         : null;
+       } // bit code reflects the point position relative to the bbox:
+       //         left  mid  right
+       //    top  1001  1000  1010
+       //    mid  0001  0000  0010
+       // bottom  0101  0100  0110
 
-             if (editable() && (lastPointerUpType === 'touch' || lastPointerUpType === 'pen')) {
-               // there are no tooltips for touch interactions so flash feedback instead
-               var text = annotation ? _t(d.id + '.tooltip', {
-                 action: annotation
-               }) : _t(d.id + '.nothing');
-               context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass(annotation ? '' : 'disabled').label(text)();
-             }
 
-             lastPointerUpType = null;
-           }).call(tooltipBehavior);
-           buttons.each(function (d) {
-             select(this).call(svgIcon('#' + d.icon));
-           });
-           context.keybinding().on(commands[0].cmd, function (d3_event) {
-             d3_event.preventDefault();
-             if (editable()) commands[0].action();
-           }).on(commands[1].cmd, function (d3_event) {
-             d3_event.preventDefault();
-             if (editable()) commands[1].action();
-           });
+       function bitCode(p, bbox) {
+         var code = 0;
+         if (p[0] < bbox[0]) code |= 1; // left
+         else if (p[0] > bbox[2]) code |= 2; // right
 
-           var debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
+         if (p[1] < bbox[1]) code |= 4; // bottom
+         else if (p[1] > bbox[3]) code |= 8; // top
 
-           context.map().on('move.undo_redo', debouncedUpdate).on('drawn.undo_redo', debouncedUpdate);
-           context.history().on('change.undo_redo', function (difference) {
-             if (difference) update();
-           });
-           context.on('enter.undo_redo', update);
+         return code;
+       }
 
-           function update() {
-             buttons.classed('disabled', function (d) {
-               return !editable() || !d.annotation();
-             }).each(function () {
-               var selection = select(this);
+       /**
+        * Takes a {@link Feature} and a bbox and clips the feature to the bbox using
+        * [lineclip](https://github.com/mapbox/lineclip).
+        * May result in degenerate edges when clipping Polygons.
+        *
+        * @name bboxClip
+        * @param {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} feature feature to clip to the bbox
+        * @param {BBox} bbox extent in [minX, minY, maxX, maxY] order
+        * @returns {Feature<LineString|MultiLineString|Polygon|MultiPolygon>} clipped Feature
+        * @example
+        * var bbox = [0, 0, 10, 10];
+        * var poly = turf.polygon([[[2, 2], [8, 4], [12, 8], [3, 7], [2, 2]]]);
+        *
+        * var clipped = turf.bboxClip(poly, bbox);
+        *
+        * //addToMap
+        * var addToMap = [bbox, poly, clipped]
+        */
 
-               if (!selection.select('.tooltip.in').empty()) {
-                 selection.call(tooltipBehavior.updateContent);
-               }
-             });
-           }
-         };
+       function bboxClip(feature, bbox) {
+         var geom = getGeom(feature);
+         var type = geom.type;
+         var properties = feature.type === "Feature" ? feature.properties : {};
+         var coords = geom.coordinates;
 
-         tool.uninstall = function () {
-           context.keybinding().off(commands[0].cmd).off(commands[1].cmd);
-           context.map().on('move.undo_redo', null).on('drawn.undo_redo', null);
-           context.history().on('change.undo_redo', null);
-           context.on('enter.undo_redo', null);
-         };
+         switch (type) {
+           case "LineString":
+           case "MultiLineString":
+             {
+               var lines_1 = [];
 
-         return tool;
-       }
+               if (type === "LineString") {
+                 coords = [coords];
+               }
 
-       function uiTopToolbar(context) {
-         var sidebarToggle = uiToolSidebarToggle(context),
-             modes = uiToolOldDrawModes(context),
-             notes = uiToolNotes(context),
-             undoRedo = uiToolUndoRedo(context),
-             save = uiToolSave(context);
+               coords.forEach(function (line) {
+                 lineclip(line, bbox, lines_1);
+               });
 
-         function notesEnabled() {
-           var noteLayer = context.layers().layer('notes');
-           return noteLayer && noteLayer.enabled();
-         }
+               if (lines_1.length === 1) {
+                 return lineString(lines_1[0], properties);
+               }
 
-         function topToolbar(bar) {
-           bar.on('wheel.topToolbar', function (d3_event) {
-             if (!d3_event.deltaX) {
-               // translate vertical scrolling into horizontal scrolling in case
-               // the user doesn't have an input device that can scroll horizontally
-               bar.node().scrollLeft += d3_event.deltaY;
+               return multiLineString(lines_1, properties);
              }
-           });
 
-           var debouncedUpdate = debounce(update, 500, {
-             leading: true,
-             trailing: true
-           });
+           case "Polygon":
+             return polygon(clipPolygon(coords, bbox), properties);
 
-           context.layers().on('change.topToolbar', debouncedUpdate);
-           update();
+           case "MultiPolygon":
+             return multiPolygon(coords.map(function (poly) {
+               return clipPolygon(poly, bbox);
+             }), properties);
 
-           function update() {
-             var tools = [sidebarToggle, 'spacer', modes];
-             tools.push('spacer');
+           default:
+             throw new Error("geometry " + type + " not supported");
+         }
+       }
 
-             if (notesEnabled()) {
-               tools = tools.concat([notes, 'spacer']);
+       function clipPolygon(rings, bbox) {
+         var outRings = [];
+
+         for (var _i = 0, rings_1 = rings; _i < rings_1.length; _i++) {
+           var ring = rings_1[_i];
+           var clipped = polygonclip(ring, bbox);
+
+           if (clipped.length > 0) {
+             if (clipped[0][0] !== clipped[clipped.length - 1][0] || clipped[0][1] !== clipped[clipped.length - 1][1]) {
+               clipped.push(clipped[0]);
              }
 
-             tools = tools.concat([undoRedo, save]);
-             var toolbarItems = bar.selectAll('.toolbar-item').data(tools, function (d) {
-               return d.id || d;
-             });
-             toolbarItems.exit().each(function (d) {
-               if (d.uninstall) {
-                 d.uninstall();
-               }
-             }).remove();
-             var itemsEnter = toolbarItems.enter().append('div').attr('class', function (d) {
-               var classes = 'toolbar-item ' + (d.id || d).replace('_', '-');
-               if (d.klass) classes += ' ' + d.klass;
-               return classes;
-             });
-             var actionableItems = itemsEnter.filter(function (d) {
-               return d !== 'spacer';
-             });
-             actionableItems.append('div').attr('class', 'item-content').each(function (d) {
-               select(this).call(d.render, bar);
-             });
-             actionableItems.append('div').attr('class', 'item-label').html(function (d) {
-               return d.label;
-             });
+             if (clipped.length >= 4) {
+               outRings.push(clipped);
+             }
            }
          }
 
-         return topToolbar;
+         return outRings;
        }
 
-       var sawVersion = null;
-       var isNewVersion = false;
-       var isNewUser = false;
-       function uiVersion(context) {
-         var currVersion = context.version;
-         var matchedVersion = currVersion.match(/\d+\.\d+\.\d+.*/);
-
-         if (sawVersion === null && matchedVersion !== null) {
-           if (corePreferences('sawVersion')) {
-             isNewUser = false;
-             isNewVersion = corePreferences('sawVersion') !== currVersion && currVersion.indexOf('-') === -1;
-           } else {
-             isNewUser = true;
-             isNewVersion = true;
-           }
+       var tiler = utilTiler().tileSize(512).margin(1);
+       var dispatch = dispatch$8('loadedData');
 
-           corePreferences('sawVersion', currVersion);
-           sawVersion = currVersion;
-         }
-
-         return function (selection) {
-           selection.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD').html(currVersion); // only show new version indicator to users that have used iD before
+       var _vtCache;
 
-           if (isNewVersion && !isNewUser) {
-             selection.append('a').attr('class', 'badge').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/release/CHANGELOG.md#whats-new').call(svgIcon('#maki-gift-11')).call(uiTooltip().title(_t.html('version.whats_new', {
-               version: currVersion
-             })).placement('top').scrollContainer(context.container().select('.main-footer-wrap')));
-           }
-         };
+       function abortRequest(controller) {
+         controller.abort();
        }
 
-       function uiZoom(context) {
-         var zooms = [{
-           id: 'zoom-in',
-           icon: 'iD-icon-plus',
-           title: _t.html('zoom.in'),
-           action: zoomIn,
-           disabled: function disabled() {
-             return !context.map().canZoomIn();
-           },
-           disabledTitle: _t.html('zoom.disabled.in'),
-           key: '+'
-         }, {
-           id: 'zoom-out',
-           icon: 'iD-icon-minus',
-           title: _t.html('zoom.out'),
-           action: zoomOut,
-           disabled: function disabled() {
-             return !context.map().canZoomOut();
-           },
-           disabledTitle: _t.html('zoom.disabled.out'),
-           key: '-'
-         }];
+       function vtToGeoJSON(data, tile, mergeCache) {
+         var vectorTile$1 = new vectorTile.VectorTile(new pbf(data));
+         var layers = Object.keys(vectorTile$1.layers);
 
-         function zoomIn(d3_event) {
-           if (d3_event.shiftKey) return;
-           d3_event.preventDefault();
-           context.map().zoomIn();
+         if (!Array.isArray(layers)) {
+           layers = [layers];
          }
 
-         function zoomOut(d3_event) {
-           if (d3_event.shiftKey) return;
-           d3_event.preventDefault();
-           context.map().zoomOut();
-         }
+         var features = [];
+         layers.forEach(function (layerID) {
+           var layer = vectorTile$1.layers[layerID];
 
-         function zoomInFurther(d3_event) {
-           if (d3_event.shiftKey) return;
-           d3_event.preventDefault();
-           context.map().zoomInFurther();
-         }
+           if (layer) {
+             for (var i = 0; i < layer.length; i++) {
+               var feature = layer.feature(i).toGeoJSON(tile.xyz[0], tile.xyz[1], tile.xyz[2]);
+               var geometry = feature.geometry; // Treat all Polygons as MultiPolygons
 
-         function zoomOutFurther(d3_event) {
-           if (d3_event.shiftKey) return;
-           d3_event.preventDefault();
-           context.map().zoomOutFurther();
-         }
+               if (geometry.type === 'Polygon') {
+                 geometry.type = 'MultiPolygon';
+                 geometry.coordinates = [geometry.coordinates];
+               }
 
-         return function (selection) {
-           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function (d) {
-             if (d.disabled()) {
-               return d.disabledTitle;
-             }
+               var isClipped = false; // Clip to tile bounds
 
-             return d.title;
-           }).keys(function (d) {
-             return [d.key];
-           });
-           var lastPointerUpType;
-           var buttons = selection.selectAll('button').data(zooms).enter().append('button').attr('class', function (d) {
-             return d.id;
-           }).on('pointerup.editor', function (d3_event) {
-             lastPointerUpType = d3_event.pointerType;
-           }).on('click.editor', function (d3_event, d) {
-             if (!d.disabled()) {
-               d.action(d3_event);
-             } else if (lastPointerUpType === 'touch' || lastPointerUpType === 'pen') {
-               context.ui().flash.duration(2000).iconName('#' + d.icon).iconClass('disabled').label(d.disabledTitle)();
-             }
+               if (geometry.type === 'MultiPolygon') {
+                 var featureClip = bboxClip(feature, tile.extent.rectangle());
 
-             lastPointerUpType = null;
-           }).call(tooltipBehavior);
-           buttons.each(function (d) {
-             select(this).call(svgIcon('#' + d.icon, 'light'));
-           });
-           utilKeybinding.plusKeys.forEach(function (key) {
-             context.keybinding().on([key], zoomIn);
-             context.keybinding().on([uiCmd('⌥' + key)], zoomInFurther);
-           });
-           utilKeybinding.minusKeys.forEach(function (key) {
-             context.keybinding().on([key], zoomOut);
-             context.keybinding().on([uiCmd('⌥' + key)], zoomOutFurther);
-           });
+                 if (!fastDeepEqual(feature.geometry, featureClip.geometry)) {
+                   // feature = featureClip;
+                   isClipped = true;
+                 }
 
-           function updateButtonStates() {
-             buttons.classed('disabled', function (d) {
-               return d.disabled();
-             }).each(function () {
-               var selection = select(this);
+                 if (!feature.geometry.coordinates.length) continue; // not actually on this tile
 
-               if (!selection.select('.tooltip.in').empty()) {
-                 selection.call(tooltipBehavior.updateContent);
-               }
-             });
-           }
+                 if (!feature.geometry.coordinates[0].length) continue; // not actually on this tile
+               } // Generate some unique IDs and add some metadata
 
-           updateButtonStates();
-           context.map().on('move.uiZoom', updateButtonStates);
-         };
-       }
 
-       function uiZoomToSelection(context) {
-         function isDisabled() {
-           var mode = context.mode();
-           return !mode || !mode.zoomToSelected;
-         }
+               var featurehash = utilHashcode(fastJsonStableStringify(feature));
+               var propertyhash = utilHashcode(fastJsonStableStringify(feature.properties || {}));
+               feature.__layerID__ = layerID.replace(/[^_a-zA-Z0-9\-]/g, '_');
+               feature.__featurehash__ = featurehash;
+               feature.__propertyhash__ = propertyhash;
+               features.push(feature); // Clipped Polygons at same zoom with identical properties can get merged
 
-         var _lastPointerUpType;
+               if (isClipped && geometry.type === 'MultiPolygon') {
+                 var merged = mergeCache[propertyhash];
 
-         function pointerup(d3_event) {
-           _lastPointerUpType = d3_event.pointerType;
-         }
+                 if (merged && merged.length) {
+                   var other = merged[0];
+                   var coords = index.union(feature.geometry.coordinates, other.geometry.coordinates);
 
-         function click(d3_event) {
-           d3_event.preventDefault();
+                   if (!coords || !coords.length) {
+                     continue; // something failed in polygon union
+                   }
 
-           if (isDisabled()) {
-             if (_lastPointerUpType === 'touch' || _lastPointerUpType === 'pen') {
-               context.ui().flash.duration(2000).iconName('#iD-icon-framed-dot').iconClass('disabled').label(_t.html('inspector.zoom_to.no_selection'))();
-             }
-           } else {
-             var mode = context.mode();
+                   merged.push(feature);
 
-             if (mode && mode.zoomToSelected) {
-               mode.zoomToSelected();
+                   for (var j = 0; j < merged.length; j++) {
+                     // all these features get...
+                     merged[j].geometry.coordinates = coords; // same coords
+
+                     merged[j].__featurehash__ = featurehash; // same hash, so deduplication works
+                   }
+                 } else {
+                   mergeCache[propertyhash] = [feature];
+                 }
+               }
              }
            }
+         });
+         return features;
+       }
 
-           _lastPointerUpType = null;
-         }
-
-         return function (selection) {
-           var tooltipBehavior = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(function () {
-             if (isDisabled()) {
-               return _t.html('inspector.zoom_to.no_selection');
-             }
+       function loadTile(source, tile) {
+         if (source.loaded[tile.id] || source.inflight[tile.id]) return;
+         var url = source.template.replace('{x}', tile.xyz[0]).replace('{y}', tile.xyz[1]) // TMS-flipped y coordinate
+         .replace(/\{[t-]y\}/, Math.pow(2, tile.xyz[2]) - tile.xyz[1] - 1).replace(/\{z(oom)?\}/, tile.xyz[2]).replace(/\{switch:([^}]+)\}/, function (s, r) {
+           var subdomains = r.split(',');
+           return subdomains[(tile.xyz[0] + tile.xyz[1]) % subdomains.length];
+         });
+         var controller = new AbortController();
+         source.inflight[tile.id] = controller;
+         fetch(url, {
+           signal: controller.signal
+         }).then(function (response) {
+           if (!response.ok) {
+             throw new Error(response.status + ' ' + response.statusText);
+           }
 
-             return _t.html('inspector.zoom_to.title');
-           }).keys([_t('inspector.zoom_to.key')]);
-           var button = selection.append('button').on('pointerup', pointerup).on('click', click).call(svgIcon('#iD-icon-framed-dot', 'light')).call(tooltipBehavior);
+           source.loaded[tile.id] = [];
+           delete source.inflight[tile.id];
+           return response.arrayBuffer();
+         }).then(function (data) {
+           if (!data) {
+             throw new Error('No Data');
+           }
 
-           function setEnabledState() {
-             button.classed('disabled', isDisabled());
+           var z = tile.xyz[2];
 
-             if (!button.select('.tooltip.in').empty()) {
-               button.call(tooltipBehavior.updateContent);
-             }
+           if (!source.canMerge[z]) {
+             source.canMerge[z] = {}; // initialize mergeCache
            }
 
-           context.on('enter.uiZoomToSelection', setEnabledState);
-           setEnabledState();
-         };
+           source.loaded[tile.id] = vtToGeoJSON(data, tile, source.canMerge[z]);
+           dispatch.call('loadedData');
+         })["catch"](function () {
+           source.loaded[tile.id] = [];
+           delete source.inflight[tile.id];
+         });
        }
 
-       function uiPane(id, context) {
-         var _key;
+       var serviceVectorTile = {
+         init: function init() {
+           if (!_vtCache) {
+             this.reset();
+           }
 
-         var _label = '';
-         var _description = '';
-         var _iconName = '';
+           this.event = utilRebind(this, dispatch, 'on');
+         },
+         reset: function reset() {
+           for (var sourceID in _vtCache) {
+             var source = _vtCache[sourceID];
 
-         var _sections; // array of uiSection objects
+             if (source && source.inflight) {
+               Object.values(source.inflight).forEach(abortRequest);
+             }
+           }
 
+           _vtCache = {};
+         },
+         addSource: function addSource(sourceID, template) {
+           _vtCache[sourceID] = {
+             template: template,
+             inflight: {},
+             loaded: {},
+             canMerge: {}
+           };
+           return _vtCache[sourceID];
+         },
+         data: function data(sourceID, projection) {
+           var source = _vtCache[sourceID];
+           if (!source) return [];
+           var tiles = tiler.getTiles(projection);
+           var seen = {};
+           var results = [];
 
-         var _paneSelection = select(null);
+           for (var i = 0; i < tiles.length; i++) {
+             var features = source.loaded[tiles[i].id];
+             if (!features || !features.length) continue;
 
-         var _paneTooltip;
+             for (var j = 0; j < features.length; j++) {
+               var feature = features[j];
+               var hash = feature.__featurehash__;
+               if (seen[hash]) continue;
+               seen[hash] = true; // return a shallow copy, because the hash may change
+               // later if this feature gets merged with another
 
-         var pane = {
-           id: id
-         };
+               results.push(Object.assign({}, feature)); // shallow copy
+             }
+           }
 
-         pane.label = function (val) {
-           if (!arguments.length) return _label;
-           _label = val;
-           return pane;
-         };
+           return results;
+         },
+         loadTiles: function loadTiles(sourceID, template, projection) {
+           var source = _vtCache[sourceID];
 
-         pane.key = function (val) {
-           if (!arguments.length) return _key;
-           _key = val;
-           return pane;
-         };
+           if (!source) {
+             source = this.addSource(sourceID, template);
+           }
 
-         pane.description = function (val) {
-           if (!arguments.length) return _description;
-           _description = val;
-           return pane;
-         };
+           var tiles = tiler.getTiles(projection); // abort inflight requests that are no longer needed
 
-         pane.iconName = function (val) {
-           if (!arguments.length) return _iconName;
-           _iconName = val;
-           return pane;
-         };
+           Object.keys(source.inflight).forEach(function (k) {
+             var wanted = tiles.find(function (tile) {
+               return k === tile.id;
+             });
 
-         pane.sections = function (val) {
-           if (!arguments.length) return _sections;
-           _sections = val;
-           return pane;
-         };
+             if (!wanted) {
+               abortRequest(source.inflight[k]);
+               delete source.inflight[k];
+             }
+           });
+           tiles.forEach(function (tile) {
+             loadTile(source, tile);
+           });
+         },
+         cache: function cache() {
+           return _vtCache;
+         }
+       };
 
-         pane.selection = function () {
-           return _paneSelection;
-         };
+       var apibase = 'https://www.wikidata.org/w/api.php?';
+       var _wikidataCache = {};
+       var serviceWikidata = {
+         init: function init() {},
+         reset: function reset() {
+           _wikidataCache = {};
+         },
+         // Search for Wikidata items matching the query
+         itemsForSearchQuery: function itemsForSearchQuery(query, callback) {
+           if (!query) {
+             if (callback) callback('No query', {});
+             return;
+           }
 
-         function hidePane() {
-           context.ui().togglePanes();
-         }
+           var lang = this.languagesToQuery()[0];
+           var url = apibase + utilQsString({
+             action: 'wbsearchentities',
+             format: 'json',
+             formatversion: 2,
+             search: query,
+             type: 'item',
+             // the language to search
+             language: lang,
+             // the language for the label and description in the result
+             uselang: lang,
+             limit: 10,
+             origin: '*'
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             }
 
-         pane.togglePane = function (d3_event) {
-           if (d3_event) d3_event.preventDefault();
+             if (callback) callback(null, result.search || {});
+           })["catch"](function (err) {
+             if (callback) callback(err.message, {});
+           });
+         },
+         // Given a Wikipedia language and article title,
+         // return an array of corresponding Wikidata entities.
+         itemsByTitle: function itemsByTitle(lang, title, callback) {
+           if (!title) {
+             if (callback) callback('No title', {});
+             return;
+           }
 
-           _paneTooltip.hide();
+           lang = lang || 'en';
+           var url = apibase + utilQsString({
+             action: 'wbgetentities',
+             format: 'json',
+             formatversion: 2,
+             sites: lang.replace(/-/g, '_') + 'wiki',
+             titles: title,
+             languages: 'en',
+             // shrink response by filtering to one language
+             origin: '*'
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             }
 
-           context.ui().togglePanes(!_paneSelection.classed('shown') ? _paneSelection : undefined);
-         };
+             if (callback) callback(null, result.entities || {});
+           })["catch"](function (err) {
+             if (callback) callback(err.message, {});
+           });
+         },
+         languagesToQuery: function languagesToQuery() {
+           return _mainLocalizer.localeCodes().map(function (code) {
+             return code.toLowerCase();
+           }).filter(function (code) {
+             // HACK: en-us isn't a wikidata language. We should really be filtering by
+             // the languages known to be supported by wikidata.
+             return code !== 'en-us';
+           });
+         },
+         entityByQID: function entityByQID(qid, callback) {
+           if (!qid) {
+             callback('No qid', {});
+             return;
+           }
 
-         pane.renderToggleButton = function (selection) {
-           if (!_paneTooltip) {
-             _paneTooltip = uiTooltip().placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left').title(_description).keys([_key]);
+           if (_wikidataCache[qid]) {
+             if (callback) callback(null, _wikidataCache[qid]);
+             return;
            }
 
-           selection.append('button').on('click', pane.togglePane).call(svgIcon('#' + _iconName, 'light')).call(_paneTooltip);
-         };
+           var langs = this.languagesToQuery();
+           var url = apibase + utilQsString({
+             action: 'wbgetentities',
+             format: 'json',
+             formatversion: 2,
+             ids: qid,
+             props: 'labels|descriptions|claims|sitelinks',
+             sitefilter: langs.map(function (d) {
+               return d + 'wiki';
+             }).join('|'),
+             languages: langs.join('|'),
+             languagefallback: 1,
+             origin: '*'
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             }
 
-         pane.renderContent = function (selection) {
-           // override to fully customize content
-           if (_sections) {
-             _sections.forEach(function (section) {
-               selection.call(section.render);
-             });
-           }
-         };
+             if (callback) callback(null, result.entities[qid] || {});
+           })["catch"](function (err) {
+             if (callback) callback(err.message, {});
+           });
+         },
+         // Pass `params` object of the form:
+         // {
+         //   qid: 'string'      // brand wikidata  (e.g. 'Q37158')
+         // }
+         //
+         // Get an result object used to display tag documentation
+         // {
+         //   title:        'string',
+         //   description:  'string',
+         //   editURL:      'string',
+         //   imageURL:     'string',
+         //   wiki:         { title: 'string', text: 'string', url: 'string' }
+         // }
+         //
+         getDocs: function getDocs(params, callback) {
+           var langs = this.languagesToQuery();
+           this.entityByQID(params.qid, function (err, entity) {
+             if (err || !entity) {
+               callback(err || 'No entity');
+               return;
+             }
 
-         pane.renderPane = function (selection) {
-           _paneSelection = selection.append('div').attr('class', 'fillL map-pane hide ' + id + '-pane').attr('pane', id);
+             var i;
+             var description;
 
-           var heading = _paneSelection.append('div').attr('class', 'pane-heading');
+             for (i in langs) {
+               var code = langs[i];
 
-           heading.append('h2').html(_label);
-           heading.append('button').on('click', hidePane).call(svgIcon('#iD-icon-close'));
+               if (entity.descriptions[code] && entity.descriptions[code].language === code) {
+                 description = entity.descriptions[code];
+                 break;
+               }
+             }
 
-           _paneSelection.append('div').attr('class', 'pane-content').call(pane.renderContent);
+             if (!description && Object.values(entity.descriptions).length) description = Object.values(entity.descriptions)[0]; // prepare result
 
-           if (_key) {
-             context.keybinding().on(_key, pane.togglePane);
-           }
-         };
+             var result = {
+               title: entity.id,
+               description: description ? description.value : '',
+               descriptionLocaleCode: description ? description.language : '',
+               editURL: 'https://www.wikidata.org/wiki/' + entity.id
+             }; // add image
 
-         return pane;
-       }
+             if (entity.claims) {
+               var imageroot = 'https://commons.wikimedia.org/w/index.php';
+               var props = ['P154', 'P18']; // logo image, image
 
-       function uiSectionBackgroundDisplayOptions(context) {
-         var section = uiSection('background-display-options', context).label(_t.html('background.display_options')).disclosureContent(renderDisclosureContent);
+               var prop, image;
 
-         var _detected = utilDetect();
+               for (i = 0; i < props.length; i++) {
+                 prop = entity.claims[props[i]];
 
-         var _storedOpacity = corePreferences('background-opacity');
+                 if (prop && Object.keys(prop).length > 0) {
+                   image = prop[Object.keys(prop)[0]].mainsnak.datavalue.value;
 
-         var _minVal = 0;
+                   if (image) {
+                     result.imageURL = imageroot + '?' + utilQsString({
+                       title: 'Special:Redirect/file/' + image,
+                       width: 400
+                     });
+                     break;
+                   }
+                 }
+               }
+             }
 
-         var _maxVal = _detected.cssfilters ? 3 : 1;
+             if (entity.sitelinks) {
+               var englishLocale = _mainLocalizer.languageCode().toLowerCase() === 'en'; // must be one of these that we requested..
 
-         var _sliders = _detected.cssfilters ? ['brightness', 'contrast', 'saturation', 'sharpness'] : ['brightness'];
+               for (i = 0; i < langs.length; i++) {
+                 // check each, in order of preference
+                 var w = langs[i] + 'wiki';
 
-         var _options = {
-           brightness: _storedOpacity !== null ? +_storedOpacity : 1,
-           contrast: 1,
-           saturation: 1,
-           sharpness: 1
-         };
+                 if (entity.sitelinks[w]) {
+                   var title = entity.sitelinks[w].title;
+                   var tKey = 'inspector.wiki_reference';
 
-         function clamp(x, min, max) {
-           return Math.max(min, Math.min(x, max));
-         }
+                   if (!englishLocale && langs[i] === 'en') {
+                     // user's locale isn't English but
+                     tKey = 'inspector.wiki_en_reference'; // we are sending them to enwiki anyway..
+                   }
 
-         function updateValue(d, val) {
-           val = clamp(val, _minVal, _maxVal);
-           _options[d] = val;
-           context.background()[d](val);
+                   result.wiki = {
+                     title: title,
+                     text: tKey,
+                     url: 'https://' + langs[i] + '.wikipedia.org/wiki/' + title.replace(/ /g, '_')
+                   };
+                   break;
+                 }
+               }
+             }
 
-           if (d === 'brightness') {
-             corePreferences('background-opacity', val);
+             callback(null, result);
+           });
+         }
+       };
+
+       var endpoint = 'https://en.wikipedia.org/w/api.php?';
+       var serviceWikipedia = {
+         init: function init() {},
+         reset: function reset() {},
+         search: function search(lang, query, callback) {
+           if (!query) {
+             if (callback) callback('No Query', []);
+             return;
            }
 
-           section.reRender();
-         }
+           lang = lang || 'en';
+           var url = endpoint.replace('en', lang) + utilQsString({
+             action: 'query',
+             list: 'search',
+             srlimit: '10',
+             srinfo: 'suggestion',
+             format: 'json',
+             origin: '*',
+             srsearch: query
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             } else if (!result || !result.query || !result.query.search) {
+               throw new Error('No Results');
+             }
 
-         function renderDisclosureContent(selection) {
-           var container = selection.selectAll('.display-options-container').data([0]);
-           var containerEnter = container.enter().append('div').attr('class', 'display-options-container controls-list'); // add slider controls
+             if (callback) {
+               var titles = result.query.search.map(function (d) {
+                 return d.title;
+               });
+               callback(null, titles);
+             }
+           })["catch"](function (err) {
+             if (callback) callback(err, []);
+           });
+         },
+         suggestions: function suggestions(lang, query, callback) {
+           if (!query) {
+             if (callback) callback('', []);
+             return;
+           }
 
-           var slidersEnter = containerEnter.selectAll('.display-control').data(_sliders).enter().append('div').attr('class', function (d) {
-             return 'display-control display-control-' + d;
+           lang = lang || 'en';
+           var url = endpoint.replace('en', lang) + utilQsString({
+             action: 'opensearch',
+             namespace: 0,
+             suggest: '',
+             format: 'json',
+             origin: '*',
+             search: query
            });
-           slidersEnter.append('h5').html(function (d) {
-             return _t.html('background.' + d);
-           }).append('span').attr('class', function (d) {
-             return 'display-option-value display-option-value-' + d;
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             } else if (!result || result.length < 2) {
+               throw new Error('No Results');
+             }
+
+             if (callback) callback(null, result[1] || []);
+           })["catch"](function (err) {
+             if (callback) callback(err.message, []);
            });
-           var sildersControlEnter = slidersEnter.append('div').attr('class', 'control-wrap');
-           sildersControlEnter.append('input').attr('class', function (d) {
-             return 'display-option-input display-option-input-' + d;
-           }).attr('type', 'range').attr('min', _minVal).attr('max', _maxVal).attr('step', '0.05').on('input', function (d3_event, d) {
-             var val = select(this).property('value');
+         },
+         translations: function translations(lang, title, callback) {
+           if (!title) {
+             if (callback) callback('No Title');
+             return;
+           }
 
-             if (!val && d3_event && d3_event.target) {
-               val = d3_event.target.value;
+           var url = endpoint.replace('en', lang) + utilQsString({
+             action: 'query',
+             prop: 'langlinks',
+             format: 'json',
+             origin: '*',
+             lllimit: 500,
+             titles: title
+           });
+           d3_json(url).then(function (result) {
+             if (result && result.error) {
+               throw new Error(result.error);
+             } else if (!result || !result.query || !result.query.pages) {
+               throw new Error('No Results');
              }
 
-             updateValue(d, val);
-           });
-           sildersControlEnter.append('button').attr('title', _t('background.reset')).attr('class', function (d) {
-             return 'display-option-reset display-option-reset-' + d;
-           }).on('click', function (d3_event, d) {
-             if (d3_event.button !== 0) return;
-             updateValue(d, 1);
-           }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo'))); // reset all button
+             if (callback) {
+               var list = result.query.pages[Object.keys(result.query.pages)[0]];
+               var translations = {};
 
-           containerEnter.append('a').attr('class', 'display-option-resetlink').attr('href', '#').html(_t.html('background.reset_all')).on('click', function (d3_event) {
-             d3_event.preventDefault();
+               if (list && list.langlinks) {
+                 list.langlinks.forEach(function (d) {
+                   translations[d.lang] = d['*'];
+                 });
+               }
 
-             for (var i = 0; i < _sliders.length; i++) {
-               updateValue(_sliders[i], 1);
+               callback(null, translations);
              }
-           }); // update
-
-           container = containerEnter.merge(container);
-           container.selectAll('.display-option-input').property('value', function (d) {
-             return _options[d];
-           });
-           container.selectAll('.display-option-value').html(function (d) {
-             return Math.floor(_options[d] * 100) + '%';
+           })["catch"](function (err) {
+             if (callback) callback(err.message);
            });
-           container.selectAll('.display-option-reset').classed('disabled', function (d) {
-             return _options[d] === 1;
-           }); // first time only, set brightness if needed
-
-           if (containerEnter.size() && _options.brightness !== 1) {
-             context.background().brightness(_options.brightness);
-           }
          }
+       };
 
-         return section;
-       }
-
-       function uiSettingsCustomBackground() {
-         var dispatch$1 = dispatch('change');
+       var services = {
+         geocoder: serviceNominatim,
+         keepRight: serviceKeepRight,
+         improveOSM: serviceImproveOSM,
+         osmose: serviceOsmose,
+         mapillary: serviceMapillary,
+         nsi: serviceNsi,
+         kartaview: serviceKartaview,
+         osm: serviceOsm,
+         osmWikibase: serviceOsmWikibase,
+         maprules: serviceMapRules,
+         streetside: serviceStreetside,
+         taginfo: serviceTaginfo,
+         vectorTile: serviceVectorTile,
+         wikidata: serviceWikidata,
+         wikipedia: serviceWikipedia
+       };
 
-         function render(selection) {
-           // keep separate copies of original and current settings
-           var _origSettings = {
-             template: corePreferences('background-custom-template')
-           };
-           var _currSettings = {
-             template: corePreferences('background-custom-template')
-           };
-           var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
-           var modal = uiConfirm(selection).okButton();
-           modal.classed('settings-modal settings-custom-background', true);
-           modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_background.header'));
-           var textSection = modal.select('.modal-section.message-text');
-           var instructions = "".concat(_t.html('settings.custom_background.instructions.info'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.wms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.proj'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.wkid'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.dimensions'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.wms.tokens.bbox'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.tms.tokens_label'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.xyz'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.flipped_y'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.switch'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.quadtile'), "\n") + "* ".concat(_t.html('settings.custom_background.instructions.tms.tokens.scale_factor'), "\n") + '\n' + "#### ".concat(_t.html('settings.custom_background.instructions.example'), "\n") + "`".concat(example, "`");
-           textSection.append('div').attr('class', 'instructions-template').html(marked_1(instructions));
-           textSection.append('textarea').attr('class', 'field-template').attr('placeholder', _t('settings.custom_background.template.placeholder')).call(utilNoAuto).property('value', _currSettings.template); // insert a cancel button
+       function modeDragNote(context) {
+         var mode = {
+           id: 'drag-note',
+           button: 'browse'
+         };
+         var edit = behaviorEdit(context);
 
-           var buttonSection = modal.select('.modal-section.buttons');
-           buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
-           buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
-           buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
+         var _nudgeInterval;
 
-           function isSaveDisabled() {
-             return null;
-           } // restore the original template
+         var _lastLoc;
 
+         var _note; // most current note.. dragged note may have stale datum.
 
-           function clickCancel() {
-             textSection.select('.field-template').property('value', _origSettings.template);
-             corePreferences('background-custom-template', _origSettings.template);
-             this.blur();
-             modal.close();
-           } // accept the current template
 
+         function startNudge(d3_event, nudge) {
+           if (_nudgeInterval) window.clearInterval(_nudgeInterval);
+           _nudgeInterval = window.setInterval(function () {
+             context.map().pan(nudge);
+             doMove(d3_event, nudge);
+           }, 50);
+         }
 
-           function clickSave() {
-             _currSettings.template = textSection.select('.field-template').property('value');
-             corePreferences('background-custom-template', _currSettings.template);
-             this.blur();
-             modal.close();
-             dispatch$1.call('change', this, _currSettings);
+         function stopNudge() {
+           if (_nudgeInterval) {
+             window.clearInterval(_nudgeInterval);
+             _nudgeInterval = null;
            }
          }
 
-         return utilRebind(render, dispatch$1, 'on');
-       }
+         function origin(note) {
+           return context.projection(note.loc);
+         }
 
-       function uiSectionBackgroundList(context) {
-         var _backgroundList = select(null);
+         function start(d3_event, note) {
+           _note = note;
+           var osm = services.osm;
 
-         var _customSource = context.background().findSource('custom');
+           if (osm) {
+             // Get latest note from cache.. The marker may have a stale datum bound to it
+             // and dragging it around can sometimes delete the users note comment.
+             _note = osm.getNote(_note.id);
+           }
 
-         var _settingsCustomBackground = uiSettingsCustomBackground().on('change', customChanged);
+           context.surface().selectAll('.note-' + _note.id).classed('active', true);
+           context.perform(actionNoop());
+           context.enter(mode);
+           context.selectedNoteID(_note.id);
+         }
 
-         var section = uiSection('background-list', context).label(_t.html('background.backgrounds')).disclosureContent(renderDisclosureContent);
+         function move(d3_event, entity, point) {
+           d3_event.stopPropagation();
+           _lastLoc = context.projection.invert(point);
+           doMove(d3_event);
+           var nudge = geoViewportEdge(point, context.map().dimensions());
 
-         function previousBackgroundID() {
-           return corePreferences('background-last-used-toggle');
+           if (nudge) {
+             startNudge(d3_event, nudge);
+           } else {
+             stopNudge();
+           }
          }
 
-         function renderDisclosureContent(selection) {
-           // the background list
-           var container = selection.selectAll('.layer-background-list').data([0]);
-           _backgroundList = container.enter().append('ul').attr('class', 'layer-list layer-background-list').attr('dir', 'auto').merge(container); // add minimap toggle below list
-
-           var bgExtrasListEnter = selection.selectAll('.bg-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list bg-extras-list');
-           var minimapLabelEnter = bgExtrasListEnter.append('li').attr('class', 'minimap-toggle-item').append('label').call(uiTooltip().title(_t.html('background.minimap.tooltip')).keys([_t('background.minimap.key')]).placement('top'));
-           minimapLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
-             d3_event.preventDefault();
-             uiMapInMap.toggle();
-           });
-           minimapLabelEnter.append('span').html(_t.html('background.minimap.description'));
-           var panelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'background-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.background.key'))]).placement('top'));
-           panelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
-             d3_event.preventDefault();
-             context.ui().info.toggle('background');
-           });
-           panelLabelEnter.append('span').html(_t.html('background.panel.description'));
-           var locPanelLabelEnter = bgExtrasListEnter.append('li').attr('class', 'location-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('background.location_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.location.key'))]).placement('top'));
-           locPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
-             d3_event.preventDefault();
-             context.ui().info.toggle('location');
-           });
-           locPanelLabelEnter.append('span').html(_t.html('background.location_panel.description')); // "Info / Report a Problem" link
+         function doMove(d3_event, nudge) {
+           nudge = nudge || [0, 0];
+           var currPoint = d3_event && d3_event.point || context.projection(_lastLoc);
+           var currMouse = geoVecSubtract(currPoint, nudge);
+           var loc = context.projection.invert(currMouse);
+           _note = _note.move(loc);
+           var osm = services.osm;
 
-           selection.selectAll('.imagery-faq').data([0]).enter().append('div').attr('class', 'imagery-faq').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/develop/FAQ.md#how-can-i-report-an-issue-with-background-imagery').append('span').html(_t.html('background.imagery_problem_faq'));
+           if (osm) {
+             osm.replaceNote(_note); // update note cache
+           }
 
-           _backgroundList.call(drawListItems, 'radio', function (d3_event, d) {
-             chooseBackground(d);
-           }, function (d) {
-             return !d.isHidden() && !d.overlay;
-           });
+           context.replace(actionNoop()); // trigger redraw
          }
 
-         function setTooltips(selection) {
-           selection.each(function (d, i, nodes) {
-             var item = select(this).select('label');
-             var span = item.select('span');
-             var placement = i < nodes.length / 2 ? 'bottom' : 'top';
-             var description = d.description();
-             var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
-             item.call(uiTooltip().destroyAny);
+         function end() {
+           context.replace(actionNoop()); // trigger redraw
 
-             if (d.id === previousBackgroundID()) {
-               item.call(uiTooltip().placement(placement).title('<div>' + _t.html('background.switch') + '</div>').keys([uiCmd('⌘' + _t('background.key'))]));
-             } else if (description || isOverflowing) {
-               item.call(uiTooltip().placement(placement).title(description || d.label()));
-             }
-           });
+           context.selectedNoteID(_note.id).enter(modeSelectNote(context, _note.id));
          }
 
-         function drawListItems(layerList, type, change, filter) {
-           var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter).sort(function (a, b) {
-             return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
-           });
-           var layerLinks = layerList.selectAll('li') // We have to be a bit inefficient about reordering the list since
-           // arrow key navigation of radio values likes to work in the order
-           // they were added, not the display document order.
-           .data(sources, function (d, i) {
-             return d.id + '---' + i;
-           });
-           layerLinks.exit().remove();
-           var enter = layerLinks.enter().append('li').classed('layer-custom', function (d) {
-             return d.id === 'custom';
-           }).classed('best', function (d) {
-             return d.best();
-           });
-           var label = enter.append('label');
-           label.append('input').attr('type', type).attr('name', 'background-layer').attr('value', function (d) {
-             return d.id;
-           }).on('change', change);
-           label.append('span').html(function (d) {
-             return d.label();
-           });
-           enter.filter(function (d) {
-             return d.id === 'custom';
-           }).append('button').attr('class', 'layer-browse').call(uiTooltip().title(_t.html('settings.custom_background.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             editCustom();
-           }).call(svgIcon('#iD-icon-more'));
-           enter.filter(function (d) {
-             return d.best();
-           }).append('div').attr('class', 'best').call(uiTooltip().title(_t.html('background.best_imagery')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).append('span').html('&#9733;');
-           layerList.call(updateLayerSelections);
-         }
+         var drag = behaviorDrag().selector('.layer-touch.markers .target.note.new').surface(context.container().select('.main-map').node()).origin(origin).on('start', start).on('move', move).on('end', end);
 
-         function updateLayerSelections(selection) {
-           function active(d) {
-             return context.background().showsLayer(d);
-           }
+         mode.enter = function () {
+           context.install(edit);
+         };
 
-           selection.selectAll('li').classed('active', active).classed('switch', function (d) {
-             return d.id === previousBackgroundID();
-           }).call(setTooltips).selectAll('input').property('checked', active);
-         }
+         mode.exit = function () {
+           context.ui().sidebar.hover.cancel();
+           context.uninstall(edit);
+           context.surface().selectAll('.active').classed('active', false);
+           stopNudge();
+         };
 
-         function chooseBackground(d) {
-           if (d.id === 'custom' && !d.template()) {
-             return editCustom();
-           }
+         mode.behavior = drag;
+         return mode;
+       }
 
-           var previousBackground = context.background().baseLayerSource();
-           corePreferences('background-last-used-toggle', previousBackground.id);
-           corePreferences('background-last-used', d.id);
-           context.background().baseLayerSource(d);
-         }
+       function modeSelectData(context, selectedDatum) {
+         var mode = {
+           id: 'select-data',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('select-data');
+         var dataEditor = uiDataEditor(context);
+         var behaviors = [behaviorBreathe(), behaviorHover(context), behaviorSelect(context), behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior]; // class the data as selected, or return to browse mode if the data is gone
 
-         function customChanged(d) {
-           if (d && d.template) {
-             _customSource.template(d.template);
+         function selectData(d3_event, drawn) {
+           var selection = context.surface().selectAll('.layer-mapdata .data' + selectedDatum.__featurehash__);
 
-             chooseBackground(_customSource);
-           } else {
-             _customSource.template('');
+           if (selection.empty()) {
+             // Return to browse mode if selected DOM elements have
+             // disappeared because the user moved them out of view..
+             var source = d3_event && d3_event.type === 'zoom' && d3_event.sourceEvent;
 
-             chooseBackground(context.background().findSource('none'));
+             if (drawn && source && (source.type === 'pointermove' || source.type === 'mousemove' || source.type === 'touchmove')) {
+               context.enter(modeBrowse(context));
+             }
+           } else {
+             selection.classed('selected', true);
            }
          }
 
-         function editCustom() {
-           context.container().call(_settingsCustomBackground);
+         function esc() {
+           if (context.container().select('.combobox').size()) return;
+           context.enter(modeBrowse(context));
          }
 
-         context.background().on('change.background_list', function () {
-           _backgroundList.call(updateLayerSelections);
-         });
-         context.map().on('move.background_list', debounce(function () {
-           // layers in-view may have changed due to map move
-           window.requestIdleCallback(section.reRender);
-         }, 1000));
-         return section;
-       }
+         mode.zoomToSelected = function () {
+           var extent = geoExtent(d3_geoBounds(selectedDatum));
+           context.map().centerZoomEase(extent.center(), context.map().trimmedExtentZoom(extent));
+         };
 
-       function uiSectionBackgroundOffset(context) {
-         var section = uiSection('background-offset', context).label(_t.html('background.fix_misalignment')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+         mode.enter = function () {
+           behaviors.forEach(context.install);
+           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on('⎋', esc, true);
+           select(document).call(keybinding);
+           selectData();
+           var sidebar = context.ui().sidebar;
+           sidebar.show(dataEditor.datum(selectedDatum)); // expand the sidebar, avoid obscuring the data if needed
 
-         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+           var extent = geoExtent(d3_geoBounds(selectedDatum));
+           sidebar.expand(sidebar.intersects(extent));
+           context.map().on('drawn.select-data', selectData);
+         };
 
-         var _directions = [['top', [0, -0.5]], ['left', [-0.5, 0]], ['right', [0.5, 0]], ['bottom', [0, 0.5]]];
+         mode.exit = function () {
+           behaviors.forEach(context.uninstall);
+           select(document).call(keybinding.unbind);
+           context.surface().selectAll('.layer-mapdata .selected').classed('selected hover', false);
+           context.map().on('drawn.select-data', null);
+           context.ui().sidebar.hide();
+         };
 
-         function updateValue() {
-           var meters = geoOffsetToMeters(context.background().offset());
-           var x = +meters[0].toFixed(2);
-           var y = +meters[1].toFixed(2);
-           context.container().selectAll('.nudge-inner-rect').select('input').classed('error', false).property('value', x + ', ' + y);
-           context.container().selectAll('.nudge-reset').classed('disabled', function () {
-             return x === 0 && y === 0;
-           });
-         }
+         return mode;
+       }
 
-         function resetOffset() {
-           context.background().offset([0, 0]);
-           updateValue();
-         }
+       function behaviorSelect(context) {
+         var _tolerancePx = 4; // see also behaviorDrag
 
-         function nudge(d) {
-           context.background().nudge(d, context.map().zoom());
-           updateValue();
-         }
+         var _lastMouseEvent = null;
+         var _showMenu = false;
+         var _downPointers = {};
+         var _longPressTimeout = null;
+         var _lastInteractionType = null; // the id of the down pointer that's enabling multiselection while down
 
-         function inputOffset() {
-           var input = select(this);
-           var d = input.node().value;
-           if (d === '') return resetOffset();
-           d = d.replace(/;/g, ',').split(',').map(function (n) {
-             // if n is NaN, it will always get mapped to false.
-             return !isNaN(n) && n;
-           });
+         var _multiselectionPointerId = null; // use pointer events on supported platforms; fallback to mouse events
 
-           if (d.length !== 2 || !d[0] || !d[1]) {
-             input.classed('error', true);
-             return;
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
+
+         function keydown(d3_event) {
+           if (d3_event.keyCode === 32) {
+             // don't react to spacebar events during text input
+             var activeNode = document.activeElement;
+             if (activeNode && new Set(['INPUT', 'TEXTAREA']).has(activeNode.nodeName)) return;
            }
 
-           context.background().offset(geoMetersToOffset(d));
-           updateValue();
-         }
+           if (d3_event.keyCode === 93 || // context menu key
+           d3_event.keyCode === 32) {
+             // spacebar
+             d3_event.preventDefault();
+           }
 
-         function dragOffset(d3_event) {
-           if (d3_event.button !== 0) return;
-           var origin = [d3_event.clientX, d3_event.clientY];
-           var pointerId = d3_event.pointerId || 'mouse';
-           context.container().append('div').attr('class', 'nudge-surface');
-           select(window).on(_pointerPrefix + 'move.drag-bg-offset', pointermove).on(_pointerPrefix + 'up.drag-bg-offset', pointerup);
+           if (d3_event.repeat) return; // ignore repeated events for held keys
+           // if any key is pressed the user is probably doing something other than long-pressing
 
-           if (_pointerPrefix === 'pointer') {
-             select(window).on('pointercancel.drag-bg-offset', pointerup);
-           }
+           cancelLongPress();
 
-           function pointermove(d3_event) {
-             if (pointerId !== (d3_event.pointerId || 'mouse')) return;
-             var latest = [d3_event.clientX, d3_event.clientY];
-             var d = [-(origin[0] - latest[0]) / 4, -(origin[1] - latest[1]) / 4];
-             origin = latest;
-             nudge(d);
+           if (d3_event.shiftKey) {
+             context.surface().classed('behavior-multiselect', true);
            }
 
-           function pointerup(d3_event) {
-             if (pointerId !== (d3_event.pointerId || 'mouse')) return;
-             if (d3_event.button !== 0) return;
-             context.container().selectAll('.nudge-surface').remove();
-             select(window).on('.drag-bg-offset', null);
+           if (d3_event.keyCode === 32) {
+             // spacebar
+             if (!_downPointers.spacebar && _lastMouseEvent) {
+               cancelLongPress();
+               _longPressTimeout = window.setTimeout(didLongPress, 500, 'spacebar', 'spacebar');
+               _downPointers.spacebar = {
+                 firstEvent: _lastMouseEvent,
+                 lastEvent: _lastMouseEvent
+               };
+             }
            }
          }
 
-         function renderDisclosureContent(selection) {
-           var container = selection.selectAll('.nudge-container').data([0]);
-           var containerEnter = container.enter().append('div').attr('class', 'nudge-container');
-           containerEnter.append('div').attr('class', 'nudge-instructions').html(_t.html('background.offset'));
-           var nudgeWrapEnter = containerEnter.append('div').attr('class', 'nudge-controls-wrap');
-           var nudgeEnter = nudgeWrapEnter.append('div').attr('class', 'nudge-outer-rect').on(_pointerPrefix + 'down', dragOffset);
-           nudgeEnter.append('div').attr('class', 'nudge-inner-rect').append('input').attr('type', 'text').on('change', inputOffset);
-           nudgeWrapEnter.append('div').selectAll('button').data(_directions).enter().append('button').attr('class', function (d) {
-             return d[0] + ' nudge';
-           }).on('click', function (d3_event, d) {
-             nudge(d[1]);
-           });
-           nudgeWrapEnter.append('button').attr('title', _t('background.reset')).attr('class', 'nudge-reset disabled').on('click', function (d3_event) {
-             d3_event.preventDefault();
-             resetOffset();
-           }).call(svgIcon('#iD-icon-' + (_mainLocalizer.textDirection() === 'rtl' ? 'redo' : 'undo')));
-           updateValue();
-         }
-
-         context.background().on('change.backgroundOffset-update', updateValue);
-         return section;
-       }
-
-       function uiSectionOverlayList(context) {
-         var section = uiSection('overlay-list', context).label(_t.html('background.overlays')).disclosureContent(renderDisclosureContent);
+         function keyup(d3_event) {
+           cancelLongPress();
 
-         var _overlayList = select(null);
+           if (!d3_event.shiftKey) {
+             context.surface().classed('behavior-multiselect', false);
+           }
 
-         function setTooltips(selection) {
-           selection.each(function (d, i, nodes) {
-             var item = select(this).select('label');
-             var span = item.select('span');
-             var placement = i < nodes.length / 2 ? 'bottom' : 'top';
-             var description = d.description();
-             var isOverflowing = span.property('clientWidth') !== span.property('scrollWidth');
-             item.call(uiTooltip().destroyAny);
+           if (d3_event.keyCode === 93) {
+             // context menu key
+             d3_event.preventDefault();
+             _lastInteractionType = 'menukey';
+             contextmenu(d3_event);
+           } else if (d3_event.keyCode === 32) {
+             // spacebar
+             var pointer = _downPointers.spacebar;
 
-             if (description || isOverflowing) {
-               item.call(uiTooltip().placement(placement).title(description || d.name()));
+             if (pointer) {
+               delete _downPointers.spacebar;
+               if (pointer.done) return;
+               d3_event.preventDefault();
+               _lastInteractionType = 'spacebar';
+               click(pointer.firstEvent, pointer.lastEvent, 'spacebar');
              }
-           });
-         }
-
-         function updateLayerSelections(selection) {
-           function active(d) {
-             return context.background().showsLayer(d);
            }
-
-           selection.selectAll('li').classed('active', active).call(setTooltips).selectAll('input').property('checked', active);
          }
 
-         function chooseOverlay(d3_event, d) {
-           d3_event.preventDefault();
-           context.background().toggleOverlayLayer(d);
-
-           _overlayList.call(updateLayerSelections);
-
-           document.activeElement.blur();
+         function pointerdown(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
+           cancelLongPress();
+           if (d3_event.buttons && d3_event.buttons !== 1) return;
+           context.ui().closeEditMenu();
+           _longPressTimeout = window.setTimeout(didLongPress, 500, id, 'longdown-' + (d3_event.pointerType || 'mouse'));
+           _downPointers[id] = {
+             firstEvent: d3_event,
+             lastEvent: d3_event
+           };
          }
 
-         function drawListItems(layerList, type, change, filter) {
-           var sources = context.background().sources(context.map().extent(), context.map().zoom(), true).filter(filter);
-           var layerLinks = layerList.selectAll('li').data(sources, function (d) {
-             return d.name();
-           });
-           layerLinks.exit().remove();
-           var enter = layerLinks.enter().append('li');
-           var label = enter.append('label');
-           label.append('input').attr('type', type).attr('name', 'layers').on('change', change);
-           label.append('span').html(function (d) {
-             return d.label();
-           });
-           layerList.selectAll('li').sort(sortSources);
-           layerList.call(updateLayerSelections);
+         function didLongPress(id, interactionType) {
+           var pointer = _downPointers[id];
+           if (!pointer) return;
+
+           for (var i in _downPointers) {
+             // don't allow this or any currently down pointer to trigger another click
+             _downPointers[i].done = true;
+           } // treat long presses like right-clicks
 
-           function sortSources(a, b) {
-             return a.best() && !b.best() ? -1 : b.best() && !a.best() ? 1 : d3_descending(a.area(), b.area()) || d3_ascending(a.name(), b.name()) || 0;
-           }
+
+           _longPressTimeout = null;
+           _lastInteractionType = interactionType;
+           _showMenu = true;
+           click(pointer.firstEvent, pointer.lastEvent, id);
          }
 
-         function renderDisclosureContent(selection) {
-           var container = selection.selectAll('.layer-overlay-list').data([0]);
-           _overlayList = container.enter().append('ul').attr('class', 'layer-list layer-overlay-list').attr('dir', 'auto').merge(container);
+         function pointermove(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
 
-           _overlayList.call(drawListItems, 'checkbox', chooseOverlay, function (d) {
-             return !d.isHidden() && d.overlay;
-           });
-         }
+           if (_downPointers[id]) {
+             _downPointers[id].lastEvent = d3_event;
+           }
 
-         context.map().on('move.overlay_list', debounce(function () {
-           // layers in-view may have changed due to map move
-           window.requestIdleCallback(section.reRender);
-         }, 1000));
-         return section;
-       }
+           if (!d3_event.pointerType || d3_event.pointerType === 'mouse') {
+             _lastMouseEvent = d3_event;
 
-       function uiPaneBackground(context) {
-         var backgroundPane = uiPane('background', context).key(_t('background.key')).label(_t.html('background.title')).description(_t.html('background.description')).iconName('iD-icon-layers').sections([uiSectionBackgroundList(context), uiSectionOverlayList(context), uiSectionBackgroundDisplayOptions(context), uiSectionBackgroundOffset(context)]);
-         return backgroundPane;
-       }
+             if (_downPointers.spacebar) {
+               _downPointers.spacebar.lastEvent = d3_event;
+             }
+           }
+         }
 
-       function uiPaneHelp(context) {
-         var docKeys = [['help', ['welcome', 'open_data_h', 'open_data', 'before_start_h', 'before_start', 'open_source_h', 'open_source', 'open_source_help']], ['overview', ['navigation_h', 'navigation_drag', 'navigation_zoom', 'features_h', 'features', 'nodes_ways']], ['editing', ['select_h', 'select_left_click', 'select_right_click', 'select_space', 'multiselect_h', 'multiselect', 'multiselect_shift_click', 'multiselect_lasso', 'undo_redo_h', 'undo_redo', 'save_h', 'save', 'save_validation', 'upload_h', 'upload', 'backups_h', 'backups', 'keyboard_h', 'keyboard']], ['feature_editor', ['intro', 'definitions', 'type_h', 'type', 'type_picker', 'fields_h', 'fields_all_fields', 'fields_example', 'fields_add_field', 'tags_h', 'tags_all_tags', 'tags_resources']], ['points', ['intro', 'add_point_h', 'add_point', 'add_point_finish', 'move_point_h', 'move_point', 'delete_point_h', 'delete_point', 'delete_point_command']], ['lines', ['intro', 'add_line_h', 'add_line', 'add_line_draw', 'add_line_continue', 'add_line_finish', 'modify_line_h', 'modify_line_dragnode', 'modify_line_addnode', 'connect_line_h', 'connect_line', 'connect_line_display', 'connect_line_drag', 'connect_line_tag', 'disconnect_line_h', 'disconnect_line_command', 'move_line_h', 'move_line_command', 'move_line_connected', 'delete_line_h', 'delete_line', 'delete_line_command']], ['areas', ['intro', 'point_or_area_h', 'point_or_area', 'add_area_h', 'add_area_command', 'add_area_draw', 'add_area_continue', 'add_area_finish', 'square_area_h', 'square_area_command', 'modify_area_h', 'modify_area_dragnode', 'modify_area_addnode', 'delete_area_h', 'delete_area', 'delete_area_command']], ['relations', ['intro', 'edit_relation_h', 'edit_relation', 'edit_relation_add', 'edit_relation_delete', 'maintain_relation_h', 'maintain_relation', 'relation_types_h', 'multipolygon_h', 'multipolygon', 'multipolygon_create', 'multipolygon_merge', 'turn_restriction_h', 'turn_restriction', 'turn_restriction_field', 'turn_restriction_editing', 'route_h', 'route', 'route_add', 'boundary_h', 'boundary', 'boundary_add']], ['operations', ['intro', 'intro_2', 'straighten', 'orthogonalize', 'circularize', 'move', 'rotate', 'reflect', 'continue', 'reverse', 'disconnect', 'split', 'extract', 'merge', 'delete', 'downgrade', 'copy_paste']], ['notes', ['intro', 'add_note_h', 'add_note', 'place_note', 'move_note', 'update_note_h', 'update_note', 'save_note_h', 'save_note']], ['imagery', ['intro', 'sources_h', 'choosing', 'sources', 'offsets_h', 'offset', 'offset_change']], ['streetlevel', ['intro', 'using_h', 'using', 'photos', 'viewer']], ['gps', ['intro', 'survey', 'using_h', 'using', 'tracing', 'upload']], ['qa', ['intro', 'tools_h', 'tools', 'issues_h', 'issues']]];
-         var headings = {
-           'help.help.open_data_h': 3,
-           'help.help.before_start_h': 3,
-           'help.help.open_source_h': 3,
-           'help.overview.navigation_h': 3,
-           'help.overview.features_h': 3,
-           'help.editing.select_h': 3,
-           'help.editing.multiselect_h': 3,
-           'help.editing.undo_redo_h': 3,
-           'help.editing.save_h': 3,
-           'help.editing.upload_h': 3,
-           'help.editing.backups_h': 3,
-           'help.editing.keyboard_h': 3,
-           'help.feature_editor.type_h': 3,
-           'help.feature_editor.fields_h': 3,
-           'help.feature_editor.tags_h': 3,
-           'help.points.add_point_h': 3,
-           'help.points.move_point_h': 3,
-           'help.points.delete_point_h': 3,
-           'help.lines.add_line_h': 3,
-           'help.lines.modify_line_h': 3,
-           'help.lines.connect_line_h': 3,
-           'help.lines.disconnect_line_h': 3,
-           'help.lines.move_line_h': 3,
-           'help.lines.delete_line_h': 3,
-           'help.areas.point_or_area_h': 3,
-           'help.areas.add_area_h': 3,
-           'help.areas.square_area_h': 3,
-           'help.areas.modify_area_h': 3,
-           'help.areas.delete_area_h': 3,
-           'help.relations.edit_relation_h': 3,
-           'help.relations.maintain_relation_h': 3,
-           'help.relations.relation_types_h': 2,
-           'help.relations.multipolygon_h': 3,
-           'help.relations.turn_restriction_h': 3,
-           'help.relations.route_h': 3,
-           'help.relations.boundary_h': 3,
-           'help.notes.add_note_h': 3,
-           'help.notes.update_note_h': 3,
-           'help.notes.save_note_h': 3,
-           'help.imagery.sources_h': 3,
-           'help.imagery.offsets_h': 3,
-           'help.streetlevel.using_h': 3,
-           'help.gps.using_h': 3,
-           'help.qa.tools_h': 3,
-           'help.qa.issues_h': 3
-         }; // For each section, squash all the texts into a single markdown document
+         function pointerup(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
+           var pointer = _downPointers[id];
+           if (!pointer) return;
+           delete _downPointers[id];
 
-         var docs = docKeys.map(function (key) {
-           var helpkey = 'help.' + key[0];
-           var helpPaneReplacements = {
-             version: context.version
-           };
-           var text = key[1].reduce(function (all, part) {
-             var subkey = helpkey + '.' + part;
-             var depth = headings[subkey]; // is this subkey a heading?
+           if (_multiselectionPointerId === id) {
+             _multiselectionPointerId = null;
+           }
 
-             var hhh = depth ? Array(depth + 1).join('#') + ' ' : ''; // if so, prepend with some ##'s
+           if (pointer.done) return;
+           click(pointer.firstEvent, d3_event, id);
+         }
 
-             return all + hhh + helpHtml(subkey, helpPaneReplacements) + '\n\n';
-           }, '');
-           return {
-             title: _t.html(helpkey + '.title'),
-             content: marked_1(text.trim()) // use keyboard key styling for shortcuts
-             .replace(/<code>/g, '<kbd>').replace(/<\/code>/g, '<\/kbd>')
-           };
-         });
-         var helpPane = uiPane('help', context).key(_t('help.key')).label(_t.html('help.title')).description(_t.html('help.title')).iconName('iD-icon-help');
+         function pointercancel(d3_event) {
+           var id = (d3_event.pointerId || 'mouse').toString();
+           if (!_downPointers[id]) return;
+           delete _downPointers[id];
 
-         helpPane.renderContent = function (content) {
-           function clickHelp(d, i) {
-             var rtl = _mainLocalizer.textDirection() === 'rtl';
-             content.property('scrollTop', 0);
-             helpPane.selection().select('.pane-heading h2').html(d.title);
-             body.html(d.content);
-             body.selectAll('a').attr('target', '_blank');
-             menuItems.classed('selected', function (m) {
-               return m.title === d.title;
-             });
-             nav.html('');
+           if (_multiselectionPointerId === id) {
+             _multiselectionPointerId = null;
+           }
+         }
 
-             if (rtl) {
-               nav.call(drawNext).call(drawPrevious);
+         function contextmenu(d3_event) {
+           d3_event.preventDefault();
+
+           if (!+d3_event.clientX && !+d3_event.clientY) {
+             if (_lastMouseEvent) {
+               d3_event.sourceEvent = _lastMouseEvent;
              } else {
-               nav.call(drawPrevious).call(drawNext);
+               return;
              }
+           } else {
+             _lastMouseEvent = d3_event;
+             _lastInteractionType = 'rightclick';
+           }
 
-             function drawNext(selection) {
-               if (i < docs.length - 1) {
-                 var nextLink = selection.append('a').attr('href', '#').attr('class', 'next').on('click', function (d3_event) {
-                   d3_event.preventDefault();
-                   clickHelp(docs[i + 1], i + 1);
-                 });
-                 nextLink.append('span').html(docs[i + 1].title).call(svgIcon(rtl ? '#iD-icon-backward' : '#iD-icon-forward', 'inline'));
-               }
-             }
+           _showMenu = true;
+           click(d3_event, d3_event);
+         }
 
-             function drawPrevious(selection) {
-               if (i > 0) {
-                 var prevLink = selection.append('a').attr('href', '#').attr('class', 'previous').on('click', function (d3_event) {
-                   d3_event.preventDefault();
-                   clickHelp(docs[i - 1], i - 1);
-                 });
-                 prevLink.call(svgIcon(rtl ? '#iD-icon-forward' : '#iD-icon-backward', 'inline')).append('span').html(docs[i - 1].title);
-               }
-             }
-           }
+         function click(firstEvent, lastEvent, pointerId) {
+           cancelLongPress();
+           var mapNode = context.container().select('.main-map').node(); // Use the `main-map` coordinate system since the surface and supersurface
+           // are transformed when drag-panning.
 
-           function clickWalkthrough(d3_event) {
-             d3_event.preventDefault();
-             if (context.inIntro()) return;
-             context.container().call(uiIntro(context));
-             context.ui().togglePanes();
-           }
+           var pointGetter = utilFastMouse(mapNode);
+           var p1 = pointGetter(firstEvent);
+           var p2 = pointGetter(lastEvent);
+           var dist = geoVecLength(p1, p2);
 
-           function clickShortcuts(d3_event) {
-             d3_event.preventDefault();
-             context.container().call(context.ui().shortcuts, true);
+           if (dist > _tolerancePx || !mapContains(lastEvent)) {
+             resetProperties();
+             return;
            }
 
-           var toc = content.append('ul').attr('class', 'toc');
-           var menuItems = toc.selectAll('li').data(docs).enter().append('li').append('a').attr('href', '#').html(function (d) {
-             return d.title;
-           }).on('click', function (d3_event, d) {
-             d3_event.preventDefault();
-             clickHelp(d, docs.indexOf(d));
-           });
-           var shortcuts = toc.append('li').attr('class', 'shortcuts').call(uiTooltip().title(_t.html('shortcuts.tooltip')).keys(['?']).placement('top')).append('a').attr('href', '#').on('click', clickShortcuts);
-           shortcuts.append('div').html(_t.html('shortcuts.title'));
-           var walkthrough = toc.append('li').attr('class', 'walkthrough').append('a').attr('href', '#').on('click', clickWalkthrough);
-           walkthrough.append('svg').attr('class', 'logo logo-walkthrough').append('use').attr('xlink:href', '#iD-logo-walkthrough');
-           walkthrough.append('div').html(_t.html('splash.walkthrough'));
-           var helpContent = content.append('div').attr('class', 'left-content');
-           var body = helpContent.append('div').attr('class', 'body');
-           var nav = helpContent.append('div').attr('class', 'nav');
-           clickHelp(docs[0], 0);
-         };
+           var targetDatum = lastEvent.target.__data__;
+           var multiselectEntityId;
 
-         return helpPane;
-       }
+           if (!_multiselectionPointerId) {
+             // If a different pointer than the one triggering this click is down on a
+             // feature, treat this and all future clicks as multiselection until that
+             // pointer is raised.
+             var selectPointerInfo = pointerDownOnSelection(pointerId);
 
-       function uiSectionValidationIssues(id, severity, context) {
-         var _issues = [];
-         var section = uiSection(id, context).label(function () {
-           if (!_issues) return '';
-           var issueCountText = _issues.length > 1000 ? '1000+' : String(_issues.length);
-           return _t('inspector.title_count', {
-             title: _t.html('issues.' + severity + 's.list_title'),
-             count: issueCountText
-           });
-         }).disclosureContent(renderDisclosureContent).shouldDisplay(function () {
-           return _issues && _issues.length;
-         });
+             if (selectPointerInfo) {
+               _multiselectionPointerId = selectPointerInfo.pointerId; // if the other feature isn't selected yet, make sure we select it
 
-         function getOptions() {
-           return {
-             what: corePreferences('validate-what') || 'edited',
-             where: corePreferences('validate-where') || 'all'
-           };
-         } // get and cache the issues to display, unordered
+               multiselectEntityId = !selectPointerInfo.selected && selectPointerInfo.entityId;
+               _downPointers[selectPointerInfo.pointerId].done = true;
+             }
+           } // support multiselect if data is already selected
 
 
-         function reloadIssues() {
-           _issues = context.validator().getIssuesBySeverity(getOptions())[severity];
-         }
+           var isMultiselect = context.mode().id === 'select' && ( // and shift key is down
+           lastEvent && lastEvent.shiftKey || // or we're lasso-selecting
+           context.surface().select('.lasso').node() || // or a pointer is down over a selected feature
+           _multiselectionPointerId && !multiselectEntityId);
 
-         function renderDisclosureContent(selection) {
-           var center = context.map().center();
-           var graph = context.graph(); // sort issues by distance away from the center of the map
+           processClick(targetDatum, isMultiselect, p2, multiselectEntityId);
 
-           var issues = _issues.map(function withDistance(issue) {
-             var extent = issue.extent(graph);
-             var dist = extent ? geoSphericalDistance(center, extent.center()) : 0;
-             return Object.assign(issue, {
-               dist: dist
-             });
-           }).sort(function byDistance(a, b) {
-             return a.dist - b.dist;
-           }); // cut off at 1000
+           function mapContains(event) {
+             var rect = mapNode.getBoundingClientRect();
+             return event.clientX >= rect.left && event.clientX <= rect.right && event.clientY >= rect.top && event.clientY <= rect.bottom;
+           }
 
+           function pointerDownOnSelection(skipPointerId) {
+             var mode = context.mode();
+             var selectedIDs = mode.id === 'select' ? mode.selectedIDs() : [];
 
-           issues = issues.slice(0, 1000); //renderIgnoredIssuesReset(_warningsSelection);
+             for (var pointerId in _downPointers) {
+               if (pointerId === 'spacebar' || pointerId === skipPointerId) continue;
+               var pointerInfo = _downPointers[pointerId];
+               var p1 = pointGetter(pointerInfo.firstEvent);
+               var p2 = pointGetter(pointerInfo.lastEvent);
+               if (geoVecLength(p1, p2) > _tolerancePx) continue;
+               var datum = pointerInfo.firstEvent.target.__data__;
+               var entity = datum && datum.properties && datum.properties.entity || datum;
 
-           selection.call(drawIssuesList, issues);
+               if (context.graph().hasEntity(entity.id)) {
+                 return {
+                   pointerId: pointerId,
+                   entityId: entity.id,
+                   selected: selectedIDs.indexOf(entity.id) !== -1
+                 };
+               }
+             }
+
+             return null;
+           }
          }
 
-         function drawIssuesList(selection, issues) {
-           var list = selection.selectAll('.issues-list').data([0]);
-           list = list.enter().append('ul').attr('class', 'layer-list issues-list ' + severity + 's-list').merge(list);
-           var items = list.selectAll('li').data(issues, function (d) {
-             return d.id;
-           }); // Exit
+         function processClick(datum, isMultiselect, point, alsoSelectId) {
+           var mode = context.mode();
+           var showMenu = _showMenu;
+           var interactionType = _lastInteractionType;
+           var entity = datum && datum.properties && datum.properties.entity;
+           if (entity) datum = entity;
 
-           items.exit().remove(); // Enter
+           if (datum && datum.type === 'midpoint') {
+             // treat targeting midpoints as if targeting the parent way
+             datum = datum.parents[0];
+           }
 
-           var itemsEnter = items.enter().append('li').attr('class', function (d) {
-             return 'issue severity-' + d.severity;
-           });
-           var labelsEnter = itemsEnter.append('button').attr('class', 'issue-label').on('click', function (d3_event, d) {
-             context.validator().focusIssue(d);
-           }).on('mouseover', function (d3_event, d) {
-             utilHighlightEntities(d.entityIds, true, context);
-           }).on('mouseout', function (d3_event, d) {
-             utilHighlightEntities(d.entityIds, false, context);
-           });
-           var textEnter = labelsEnter.append('span').attr('class', 'issue-text');
-           textEnter.append('span').attr('class', 'issue-icon').each(function (d) {
-             var iconName = '#iD-icon-' + (d.severity === 'warning' ? 'alert' : 'error');
-             select(this).call(svgIcon(iconName));
-           });
-           textEnter.append('span').attr('class', 'issue-message');
-           /*
-           labelsEnter
-               .append('span')
-               .attr('class', 'issue-autofix')
-               .each(function(d) {
-                   if (!d.autoFix) return;
-                    d3_select(this)
-                       .append('button')
-                       .attr('title', t('issues.fix_one.title'))
-                       .datum(d.autoFix)  // set button datum to the autofix
-                       .attr('class', 'autofix action')
-                       .on('click', function(d3_event, d) {
-                           d3_event.preventDefault();
-                           d3_event.stopPropagation();
-                            var issuesEntityIDs = d.issue.entityIds;
-                           utilHighlightEntities(issuesEntityIDs.concat(d.entityIds), false, context);
-                            context.perform.apply(context, d.autoArgs);
-                           context.validator().validate();
-                       })
-                       .call(svgIcon('#iD-icon-wrench'));
-               });
-           */
-           // Update
+           var newMode;
 
-           items = items.merge(itemsEnter).order();
-           items.selectAll('.issue-message').html(function (d) {
-             return d.message(context);
-           });
-           /*
-           // autofix
-           var canAutoFix = issues.filter(function(issue) { return issue.autoFix; });
-            var autoFixAll = selection.selectAll('.autofix-all')
-               .data(canAutoFix.length ? [0] : []);
-            // exit
-           autoFixAll.exit()
-               .remove();
-            // enter
-           var autoFixAllEnter = autoFixAll.enter()
-               .insert('div', '.issues-list')
-               .attr('class', 'autofix-all');
-            var linkEnter = autoFixAllEnter
-               .append('a')
-               .attr('class', 'autofix-all-link')
-               .attr('href', '#');
-            linkEnter
-               .append('span')
-               .attr('class', 'autofix-all-link-text')
-               .html(t.html('issues.fix_all.title'));
-            linkEnter
-               .append('span')
-               .attr('class', 'autofix-all-link-icon')
-               .call(svgIcon('#iD-icon-wrench'));
-            if (severity === 'warning') {
-               renderIgnoredIssuesReset(selection);
-           }
-            // update
-           autoFixAll = autoFixAll
-               .merge(autoFixAllEnter);
-            autoFixAll.selectAll('.autofix-all-link')
-               .on('click', function() {
-                   context.pauseChangeDispatch();
-                   context.perform(actionNoop());
-                   canAutoFix.forEach(function(issue) {
-                       var args = issue.autoFix.autoArgs.slice();  // copy
-                       if (typeof args[args.length - 1] !== 'function') {
-                           args.pop();
-                       }
-                       args.push(t('issues.fix_all.annotation'));
-                       context.replace.apply(context, args);
-                   });
-                   context.resumeChangeDispatch();
-                   context.validator().validate();
-               });
-           */
-         }
+           if (datum instanceof osmEntity) {
+             // targeting an entity
+             var selectedIDs = context.selectedIDs();
+             context.selectedNoteID(null);
+             context.selectedErrorID(null);
 
-         context.validator().on('validated.uiSectionValidationIssues' + id, function () {
-           window.requestIdleCallback(function () {
-             reloadIssues();
-             section.reRender();
-           });
-         });
-         context.map().on('move.uiSectionValidationIssues' + id, debounce(function () {
-           window.requestIdleCallback(function () {
-             if (getOptions().where === 'visible') {
-               // must refetch issues if they are viewport-dependent
-               reloadIssues();
-             } // always reload list to re-sort-by-distance
+             if (!isMultiselect) {
+               // don't change the selection if we're toggling the menu atop a multiselection
+               if (!showMenu || selectedIDs.length <= 1 || selectedIDs.indexOf(datum.id) === -1) {
+                 if (alsoSelectId === datum.id) alsoSelectId = null;
+                 selectedIDs = (alsoSelectId ? [alsoSelectId] : []).concat([datum.id]); // always enter modeSelect even if the entity is already
+                 // selected since listeners may expect `context.enter` events,
+                 // e.g. in the walkthrough
 
+                 newMode = mode.id === 'select' ? mode.selectedIDs(selectedIDs) : modeSelect(context, selectedIDs).selectBehavior(behavior);
+                 context.enter(newMode);
+               }
+             } else {
+               if (selectedIDs.indexOf(datum.id) !== -1) {
+                 // clicked entity is already in the selectedIDs list..
+                 if (!showMenu) {
+                   // deselect clicked entity, then reenter select mode or return to browse mode..
+                   selectedIDs = selectedIDs.filter(function (id) {
+                     return id !== datum.id;
+                   });
+                   newMode = selectedIDs.length ? mode.selectedIDs(selectedIDs) : modeBrowse(context).selectBehavior(behavior);
+                   context.enter(newMode);
+                 }
+               } else {
+                 // clicked entity is not in the selected list, add it..
+                 selectedIDs = selectedIDs.concat([datum.id]);
+                 newMode = mode.selectedIDs(selectedIDs);
+                 context.enter(newMode);
+               }
+             }
+           } else if (datum && datum.__featurehash__ && !isMultiselect) {
+             // targeting custom data
+             context.selectedNoteID(null).enter(modeSelectData(context, datum));
+           } else if (datum instanceof osmNote && !isMultiselect) {
+             // targeting a note
+             context.selectedNoteID(datum.id).enter(modeSelectNote(context, datum.id));
+           } else if (datum instanceof QAItem & !isMultiselect) {
+             // targeting an external QA issue
+             context.selectedErrorID(datum.id).enter(modeSelectError(context, datum.id, datum.service));
+           } else {
+             // targeting nothing
+             context.selectedNoteID(null);
+             context.selectedErrorID(null);
 
-             section.reRender();
-           });
-         }, 1000));
-         return section;
-       }
+             if (!isMultiselect && mode.id !== 'browse') {
+               context.enter(modeBrowse(context));
+             }
+           }
 
-       function uiSectionValidationOptions(context) {
-         var section = uiSection('issues-options', context).content(renderContent);
+           context.ui().closeEditMenu(); // always request to show the edit menu in case the mode needs it
 
-         function renderContent(selection) {
-           var container = selection.selectAll('.issues-options-container').data([0]);
-           container = container.enter().append('div').attr('class', 'issues-options-container').merge(container);
-           var data = [{
-             key: 'what',
-             values: ['edited', 'all']
-           }, {
-             key: 'where',
-             values: ['visible', 'all']
-           }];
-           var options = container.selectAll('.issues-option').data(data, function (d) {
-             return d.key;
-           });
-           var optionsEnter = options.enter().append('div').attr('class', function (d) {
-             return 'issues-option issues-option-' + d.key;
-           });
-           optionsEnter.append('div').attr('class', 'issues-option-title').html(function (d) {
-             return _t.html('issues.options.' + d.key + '.title');
-           });
-           var valuesEnter = optionsEnter.selectAll('label').data(function (d) {
-             return d.values.map(function (val) {
-               return {
-                 value: val,
-                 key: d.key
-               };
-             });
-           }).enter().append('label');
-           valuesEnter.append('input').attr('type', 'radio').attr('name', function (d) {
-             return 'issues-option-' + d.key;
-           }).attr('value', function (d) {
-             return d.value;
-           }).property('checked', function (d) {
-             return getOptions()[d.key] === d.value;
-           }).on('change', function (d3_event, d) {
-             updateOptionValue(d3_event, d.key, d.value);
-           });
-           valuesEnter.append('span').html(function (d) {
-             return _t.html('issues.options.' + d.key + '.' + d.value);
-           });
+           if (showMenu) context.ui().showEditMenu(point, interactionType);
+           resetProperties();
          }
 
-         function getOptions() {
-           return {
-             what: corePreferences('validate-what') || 'edited',
-             // 'all', 'edited'
-             where: corePreferences('validate-where') || 'all' // 'all', 'visible'
+         function cancelLongPress() {
+           if (_longPressTimeout) window.clearTimeout(_longPressTimeout);
+           _longPressTimeout = null;
+         }
 
-           };
+         function resetProperties() {
+           cancelLongPress();
+           _showMenu = false;
+           _lastInteractionType = null; // don't reset _lastMouseEvent since it might still be useful
          }
 
-         function updateOptionValue(d3_event, d, val) {
-           if (!val && d3_event && d3_event.target) {
-             val = d3_event.target.value;
-           }
+         function behavior(selection) {
+           resetProperties();
+           _lastMouseEvent = context.map().lastPointerEvent();
+           select(window).on('keydown.select', keydown).on('keyup.select', keyup).on(_pointerPrefix + 'move.select', pointermove, true).on(_pointerPrefix + 'up.select', pointerup, true).on('pointercancel.select', pointercancel, true).on('contextmenu.select-window', function (d3_event) {
+             // Edge and IE really like to show the contextmenu on the
+             // menubar when user presses a keyboard menu button
+             // even after we've already preventdefaulted the key event.
+             var e = d3_event;
 
-           corePreferences('validate-' + d, val);
-           context.validator().validate();
+             if (+e.clientX === 0 && +e.clientY === 0) {
+               d3_event.preventDefault();
+             }
+           });
+           selection.on(_pointerPrefix + 'down.select', pointerdown).on('contextmenu.select', contextmenu);
+           /*if (d3_event && d3_event.shiftKey) {
+               context.surface()
+                   .classed('behavior-multiselect', true);
+           }*/
          }
 
-         return section;
-       }
-
-       function uiSectionValidationRules(context) {
-         var MINSQUARE = 0;
-         var MAXSQUARE = 20;
-         var DEFAULTSQUARE = 5; // see also unsquare_way.js
+         behavior.off = function (selection) {
+           cancelLongPress();
+           select(window).on('keydown.select', null).on('keyup.select', null).on('contextmenu.select-window', null).on(_pointerPrefix + 'move.select', null, true).on(_pointerPrefix + 'up.select', null, true).on('pointercancel.select', null, true);
+           selection.on(_pointerPrefix + 'down.select', null).on('contextmenu.select', null);
+           context.surface().classed('behavior-multiselect', false);
+         };
 
-         var section = uiSection('issues-rules', context).disclosureContent(renderDisclosureContent).label(_t.html('issues.rules.title'));
+         return behavior;
+       }
 
-         var _ruleKeys = context.validator().getRuleKeys().filter(function (key) {
-           return key !== 'maprules';
-         }).sort(function (key1, key2) {
-           // alphabetize by localized title
-           return _t('issues.' + key1 + '.title') < _t('issues.' + key2 + '.title') ? -1 : 1;
+       function operationContinue(context, selectedIDs) {
+         var _entities = selectedIDs.map(function (id) {
+           return context.graph().entity(id);
          });
 
-         function renderDisclosureContent(selection) {
-           var container = selection.selectAll('.issues-rulelist-container').data([0]);
-           var containerEnter = container.enter().append('div').attr('class', 'issues-rulelist-container');
-           containerEnter.append('ul').attr('class', 'layer-list issue-rules-list');
-           var ruleLinks = containerEnter.append('div').attr('class', 'issue-rules-links section-footer');
-           ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             context.validator().disableRules(_ruleKeys);
-           });
-           ruleLinks.append('a').attr('class', 'issue-rules-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             context.validator().disableRules([]);
-           }); // Update
+         var _geometries = Object.assign({
+           line: [],
+           vertex: []
+         }, utilArrayGroupBy(_entities, function (entity) {
+           return entity.geometry(context.graph());
+         }));
 
-           container = container.merge(containerEnter);
-           container.selectAll('.issue-rules-list').call(drawListItems, _ruleKeys, 'checkbox', 'rule', toggleRule, isRuleEnabled);
+         var _vertex = _geometries.vertex.length && _geometries.vertex[0];
+
+         function candidateWays() {
+           return _vertex ? context.graph().parentWays(_vertex).filter(function (parent) {
+             return parent.geometry(context.graph()) === 'line' && !parent.isClosed() && parent.affix(_vertex.id) && (_geometries.line.length === 0 || _geometries.line[0] === parent);
+           }) : [];
          }
 
-         function drawListItems(selection, data, type, name, change, active) {
-           var items = selection.selectAll('li').data(data); // Exit
+         var _candidates = candidateWays();
 
-           items.exit().remove(); // Enter
+         var operation = function operation() {
+           var candidate = _candidates[0];
+           context.enter(modeDrawLine(context, candidate.id, context.graph(), 'line', candidate.affix(_vertex.id), true));
+         };
 
-           var enter = items.enter().append('li');
+         operation.relatedEntityIds = function () {
+           return _candidates.length ? [_candidates[0].id] : [];
+         };
 
-           if (name === 'rule') {
-             enter.call(uiTooltip().title(function (d) {
-               return _t.html('issues.' + d + '.tip');
-             }).placement('top'));
+         operation.available = function () {
+           return _geometries.vertex.length === 1 && _geometries.line.length <= 1 && !context.features().hasHiddenConnections(_vertex, context.graph());
+         };
+
+         operation.disabled = function () {
+           if (_candidates.length === 0) {
+             return 'not_eligible';
+           } else if (_candidates.length > 1) {
+             return 'multiple';
            }
 
-           var label = enter.append('label');
-           label.append('input').attr('type', type).attr('name', name).on('change', change);
-           label.append('span').html(function (d) {
-             var params = {};
+           return false;
+         };
 
-             if (d === 'unsquare_way') {
-               params.val = '<span class="square-degrees"></span>';
-             }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.continue.' + disable) : _t('operations.continue.description');
+         };
 
-             return _t.html('issues.' + d + '.title', params);
-           }); // Update
+         operation.annotation = function () {
+           return _t('operations.continue.annotation.line');
+         };
 
-           items = items.merge(enter);
-           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false); // user-configurable square threshold
+         operation.id = 'continue';
+         operation.keys = [_t('operations.continue.key')];
+         operation.title = _t('operations.continue.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-           var degStr = corePreferences('validate-square-degrees');
+       function operationCopy(context, selectedIDs) {
+         function getFilteredIdsToCopy() {
+           return selectedIDs.filter(function (selectedID) {
+             var entity = context.graph().hasEntity(selectedID); // don't copy untagged vertices separately from ways
 
-           if (degStr === null) {
-             degStr = DEFAULTSQUARE.toString();
+             return entity.hasInterestingTags() || entity.geometry(context.graph()) !== 'vertex';
+           });
+         }
+
+         var operation = function operation() {
+           var graph = context.graph();
+           var selected = groupEntities(getFilteredIdsToCopy(), graph);
+           var canCopy = [];
+           var skip = {};
+           var entity;
+           var i;
+
+           for (i = 0; i < selected.relation.length; i++) {
+             entity = selected.relation[i];
+
+             if (!skip[entity.id] && entity.isComplete(graph)) {
+               canCopy.push(entity.id);
+               skip = getDescendants(entity.id, graph, skip);
+             }
            }
 
-           var span = items.selectAll('.square-degrees');
-           var input = span.selectAll('.square-degrees-input').data([0]); // enter / update
+           for (i = 0; i < selected.way.length; i++) {
+             entity = selected.way[i];
 
-           input.enter().append('input').attr('type', 'number').attr('min', MINSQUARE.toString()).attr('max', MAXSQUARE.toString()).attr('step', '0.5').attr('class', 'square-degrees-input').call(utilNoAuto).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation();
-             this.select();
-           }).on('keyup', function (d3_event) {
-             if (d3_event.keyCode === 13) {
-               // ↩ Return
-               this.blur();
-               this.select();
+             if (!skip[entity.id]) {
+               canCopy.push(entity.id);
+               skip = getDescendants(entity.id, graph, skip);
              }
-           }).on('blur', changeSquare).merge(input).property('value', degStr);
-         }
+           }
 
-         function changeSquare() {
-           var input = select(this);
-           var degStr = utilGetSetValue(input).trim();
-           var degNum = parseFloat(degStr, 10);
+           for (i = 0; i < selected.node.length; i++) {
+             entity = selected.node[i];
 
-           if (!isFinite(degNum)) {
-             degNum = DEFAULTSQUARE;
-           } else if (degNum > MAXSQUARE) {
-             degNum = MAXSQUARE;
-           } else if (degNum < MINSQUARE) {
-             degNum = MINSQUARE;
+             if (!skip[entity.id]) {
+               canCopy.push(entity.id);
+             }
            }
 
-           degNum = Math.round(degNum * 10) / 10; // round to 1 decimal
+           context.copyIDs(canCopy);
 
-           degStr = degNum.toString();
-           input.property('value', degStr);
-           corePreferences('validate-square-degrees', degStr);
-           context.validator().reloadUnsquareIssues();
-         }
+           if (_point && (canCopy.length !== 1 || graph.entity(canCopy[0]).type !== 'node')) {
+             // store the anchor coordinates if copying more than a single node
+             context.copyLonLat(context.projection.invert(_point));
+           } else {
+             context.copyLonLat(null);
+           }
+         };
 
-         function isRuleEnabled(d) {
-           return context.validator().isRuleEnabled(d);
+         function groupEntities(ids, graph) {
+           var entities = ids.map(function (id) {
+             return graph.entity(id);
+           });
+           return Object.assign({
+             relation: [],
+             way: [],
+             node: []
+           }, utilArrayGroupBy(entities, 'type'));
          }
 
-         function toggleRule(d3_event, d) {
-           context.validator().toggleRule(d);
-         }
+         function getDescendants(id, graph, descendants) {
+           var entity = graph.entity(id);
+           var children;
+           descendants = descendants || {};
 
-         context.validator().on('validated.uiSectionValidationRules', function () {
-           window.requestIdleCallback(section.reRender);
-         });
-         return section;
-       }
+           if (entity.type === 'relation') {
+             children = entity.members.map(function (m) {
+               return m.id;
+             });
+           } else if (entity.type === 'way') {
+             children = entity.nodes;
+           } else {
+             children = [];
+           }
 
-       function uiSectionValidationStatus(context) {
-         var section = uiSection('issues-status', context).content(renderContent).shouldDisplay(function () {
-           var issues = context.validator().getIssues(getOptions());
-           return issues.length === 0;
-         });
+           for (var i = 0; i < children.length; i++) {
+             if (!descendants[children[i]]) {
+               descendants[children[i]] = true;
+               descendants = getDescendants(children[i], graph, descendants);
+             }
+           }
 
-         function getOptions() {
-           return {
-             what: corePreferences('validate-what') || 'edited',
-             where: corePreferences('validate-where') || 'all'
-           };
+           return descendants;
          }
 
-         function renderContent(selection) {
-           var box = selection.selectAll('.box').data([0]);
-           var boxEnter = box.enter().append('div').attr('class', 'box');
-           boxEnter.append('div').call(svgIcon('#iD-icon-apply', 'pre-text'));
-           var noIssuesMessage = boxEnter.append('span');
-           noIssuesMessage.append('strong').attr('class', 'message');
-           noIssuesMessage.append('br');
-           noIssuesMessage.append('span').attr('class', 'details');
-           renderIgnoredIssuesReset(selection);
-           setNoIssuesText(selection);
-         }
+         operation.available = function () {
+           return getFilteredIdsToCopy().length > 0;
+         };
 
-         function renderIgnoredIssuesReset(selection) {
-           var ignoredIssues = context.validator().getIssues({
-             what: 'all',
-             where: 'all',
-             includeDisabledRules: true,
-             includeIgnored: 'only'
-           });
-           var resetIgnored = selection.selectAll('.reset-ignored').data(ignoredIssues.length ? [0] : []); // exit
+         operation.disabled = function () {
+           var extent = utilTotalExtent(getFilteredIdsToCopy(), context.graph());
 
-           resetIgnored.exit().remove(); // enter
+           if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           }
 
-           var resetIgnoredEnter = resetIgnored.enter().append('div').attr('class', 'reset-ignored section-footer');
-           resetIgnoredEnter.append('a').attr('href', '#'); // update
+           return false;
+         };
 
-           resetIgnored = resetIgnored.merge(resetIgnoredEnter);
-           resetIgnored.select('a').html(_t('inspector.title_count', {
-             title: _t.html('issues.reset_ignored'),
-             count: ignoredIssues.length
-           }));
-           resetIgnored.on('click', function (d3_event) {
-             d3_event.preventDefault();
-             context.validator().resetIgnoredIssues();
+         operation.availableForKeypress = function () {
+           var selection = window.getSelection && window.getSelection(); // if the user has text selected then let them copy that, not the selected feature
+
+           return !selection || !selection.toString();
+         };
+
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.copy.' + disable, {
+             n: selectedIDs.length
+           }) : _t('operations.copy.description', {
+             n: selectedIDs.length
            });
-         }
+         };
 
-         function setNoIssuesText(selection) {
-           var opts = getOptions();
+         operation.annotation = function () {
+           return _t('operations.copy.annotation', {
+             n: selectedIDs.length
+           });
+         };
 
-           function checkForHiddenIssues(cases) {
-             for (var type in cases) {
-               var hiddenOpts = cases[type];
-               var hiddenIssues = context.validator().getIssues(hiddenOpts);
+         var _point;
 
-               if (hiddenIssues.length) {
-                 selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.' + type, {
-                   count: hiddenIssues.length.toString()
-                 }));
-                 return;
-               }
-             }
+         operation.point = function (val) {
+           _point = val;
+           return operation;
+         };
 
-             selection.select('.box .details').html(_t.html('issues.no_issues.hidden_issues.none'));
-           }
+         operation.id = 'copy';
+         operation.keys = [uiCmd('⌘C')];
+         operation.title = _t('operations.copy.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-           var messageType;
+       function operationDisconnect(context, selectedIDs) {
+         var _vertexIDs = [];
+         var _wayIDs = [];
+         var _otherIDs = [];
+         var _actions = [];
+         selectedIDs.forEach(function (id) {
+           var entity = context.entity(id);
 
-           if (opts.what === 'edited' && opts.where === 'visible') {
-             messageType = 'edits_in_view';
-             checkForHiddenIssues({
-               elsewhere: {
-                 what: 'edited',
-                 where: 'all'
-               },
-               everything_else: {
-                 what: 'all',
-                 where: 'visible'
-               },
-               disabled_rules: {
-                 what: 'edited',
-                 where: 'visible',
-                 includeDisabledRules: 'only'
-               },
-               everything_else_elsewhere: {
-                 what: 'all',
-                 where: 'all'
-               },
-               disabled_rules_elsewhere: {
-                 what: 'edited',
-                 where: 'all',
-                 includeDisabledRules: 'only'
-               },
-               ignored_issues: {
-                 what: 'edited',
-                 where: 'visible',
-                 includeIgnored: 'only'
-               },
-               ignored_issues_elsewhere: {
-                 what: 'edited',
-                 where: 'all',
-                 includeIgnored: 'only'
-               }
-             });
-           } else if (opts.what === 'edited' && opts.where === 'all') {
-             messageType = 'edits';
-             checkForHiddenIssues({
-               everything_else: {
-                 what: 'all',
-                 where: 'all'
-               },
-               disabled_rules: {
-                 what: 'edited',
-                 where: 'all',
-                 includeDisabledRules: 'only'
-               },
-               ignored_issues: {
-                 what: 'edited',
-                 where: 'all',
-                 includeIgnored: 'only'
-               }
-             });
-           } else if (opts.what === 'all' && opts.where === 'visible') {
-             messageType = 'everything_in_view';
-             checkForHiddenIssues({
-               elsewhere: {
-                 what: 'all',
-                 where: 'all'
-               },
-               disabled_rules: {
-                 what: 'all',
-                 where: 'visible',
-                 includeDisabledRules: 'only'
-               },
-               disabled_rules_elsewhere: {
-                 what: 'all',
-                 where: 'all',
-                 includeDisabledRules: 'only'
-               },
-               ignored_issues: {
-                 what: 'all',
-                 where: 'visible',
-                 includeIgnored: 'only'
-               },
-               ignored_issues_elsewhere: {
-                 what: 'all',
-                 where: 'all',
-                 includeIgnored: 'only'
-               }
-             });
-           } else if (opts.what === 'all' && opts.where === 'all') {
-             messageType = 'everything';
-             checkForHiddenIssues({
-               disabled_rules: {
-                 what: 'all',
-                 where: 'all',
-                 includeDisabledRules: 'only'
-               },
-               ignored_issues: {
-                 what: 'all',
-                 where: 'all',
-                 includeIgnored: 'only'
-               }
-             });
+           if (entity.type === 'way') {
+             _wayIDs.push(id);
+           } else if (entity.geometry(context.graph()) === 'vertex') {
+             _vertexIDs.push(id);
+           } else {
+             _otherIDs.push(id);
            }
+         });
 
-           if (opts.what === 'edited' && context.history().difference().summary().length === 0) {
-             messageType = 'no_edits';
-           }
+         var _coords,
+             _descriptionID = '',
+             _annotationID = 'features';
 
-           selection.select('.box .message').html(_t.html('issues.no_issues.message.' + messageType));
-         }
+         var _disconnectingVertexIds = [];
+         var _disconnectingWayIds = [];
 
-         context.validator().on('validated.uiSectionValidationStatus', function () {
-           window.requestIdleCallback(section.reRender);
-         });
-         context.map().on('move.uiSectionValidationStatus', debounce(function () {
-           window.requestIdleCallback(section.reRender);
-         }, 1000));
-         return section;
-       }
+         if (_vertexIDs.length > 0) {
+           // At the selected vertices, disconnect the selected ways, if any, else
+           // disconnect all connected ways
+           _disconnectingVertexIds = _vertexIDs;
 
-       function uiPaneIssues(context) {
-         var issuesPane = uiPane('issues', context).key(_t('issues.key')).label(_t.html('issues.title')).description(_t.html('issues.title')).iconName('iD-icon-alert').sections([uiSectionValidationOptions(context), uiSectionValidationStatus(context), uiSectionValidationIssues('issues-errors', 'error', context), uiSectionValidationIssues('issues-warnings', 'warning', context), uiSectionValidationRules(context)]);
-         return issuesPane;
-       }
+           _vertexIDs.forEach(function (vertexID) {
+             var action = actionDisconnect(vertexID);
 
-       function uiSettingsCustomData(context) {
-         var dispatch$1 = dispatch('change');
+             if (_wayIDs.length > 0) {
+               var waysIDsForVertex = _wayIDs.filter(function (wayID) {
+                 var way = context.entity(wayID);
+                 return way.nodes.indexOf(vertexID) !== -1;
+               });
 
-         function render(selection) {
-           var dataLayer = context.layers().layer('data'); // keep separate copies of original and current settings
+               action.limitWays(waysIDsForVertex);
+             }
 
-           var _origSettings = {
-             fileList: dataLayer && dataLayer.fileList() || null,
-             url: corePreferences('settings-custom-data-url')
-           };
-           var _currSettings = {
-             fileList: dataLayer && dataLayer.fileList() || null,
-             url: corePreferences('settings-custom-data-url')
-           }; // var example = 'https://{switch:a,b,c}.tile.openstreetmap.org/{zoom}/{x}/{y}.png';
+             _actions.push(action);
 
-           var modal = uiConfirm(selection).okButton();
-           modal.classed('settings-modal settings-custom-data', true);
-           modal.select('.modal-section.header').append('h3').html(_t.html('settings.custom_data.header'));
-           var textSection = modal.select('.modal-section.message-text');
-           textSection.append('pre').attr('class', 'instructions-file').html(_t.html('settings.custom_data.file.instructions'));
-           textSection.append('input').attr('class', 'field-file').attr('type', 'file').property('files', _currSettings.fileList) // works for all except IE11
-           .on('change', function (d3_event) {
-             var files = d3_event.target.files;
+             _disconnectingWayIds = _disconnectingWayIds.concat(context.graph().parentWays(context.graph().entity(vertexID)).map(function (d) {
+               return d.id;
+             }));
+           });
 
-             if (files && files.length) {
-               _currSettings.url = '';
-               textSection.select('.field-url').property('value', '');
-               _currSettings.fileList = files;
-             } else {
-               _currSettings.fileList = null;
-             }
+           _disconnectingWayIds = utilArrayUniq(_disconnectingWayIds).filter(function (id) {
+             return _wayIDs.indexOf(id) === -1;
+           });
+           _descriptionID += _actions.length === 1 ? 'single_point.' : 'multiple_points.';
+
+           if (_wayIDs.length === 1) {
+             _descriptionID += 'single_way.' + context.graph().geometry(_wayIDs[0]);
+           } else {
+             _descriptionID += _wayIDs.length === 0 ? 'no_ways' : 'multiple_ways';
+           }
+         } else if (_wayIDs.length > 0) {
+           // Disconnect the selected ways from each other, if they're connected,
+           // else disconnect them from all connected ways
+           var ways = _wayIDs.map(function (id) {
+             return context.entity(id);
            });
-           textSection.append('h4').html(_t.html('settings.custom_data.or'));
-           textSection.append('pre').attr('class', 'instructions-url').html(_t.html('settings.custom_data.url.instructions'));
-           textSection.append('textarea').attr('class', 'field-url').attr('placeholder', _t('settings.custom_data.url.placeholder')).call(utilNoAuto).property('value', _currSettings.url); // insert a cancel button
 
-           var buttonSection = modal.select('.modal-section.buttons');
-           buttonSection.insert('button', '.ok-button').attr('class', 'button cancel-button secondary-action').html(_t.html('confirm.cancel'));
-           buttonSection.select('.cancel-button').on('click.cancel', clickCancel);
-           buttonSection.select('.ok-button').attr('disabled', isSaveDisabled).on('click.save', clickSave);
+           var nodes = utilGetAllNodes(_wayIDs, context.graph());
+           _coords = nodes.map(function (n) {
+             return n.loc;
+           }); // actions for connected nodes shared by at least two selected ways
 
-           function isSaveDisabled() {
-             return null;
-           } // restore the original url
+           var sharedActions = [];
+           var sharedNodes = []; // actions for connected nodes
 
+           var unsharedActions = [];
+           var unsharedNodes = [];
+           nodes.forEach(function (node) {
+             var action = actionDisconnect(node.id).limitWays(_wayIDs);
 
-           function clickCancel() {
-             textSection.select('.field-url').property('value', _origSettings.url);
-             corePreferences('settings-custom-data-url', _origSettings.url);
-             this.blur();
-             modal.close();
-           } // accept the current url
+             if (action.disabled(context.graph()) !== 'not_connected') {
+               var count = 0;
 
+               for (var i in ways) {
+                 var way = ways[i];
 
-           function clickSave() {
-             _currSettings.url = textSection.select('.field-url').property('value').trim(); // one or the other but not both
+                 if (way.nodes.indexOf(node.id) !== -1) {
+                   count += 1;
+                 }
 
-             if (_currSettings.url) {
-               _currSettings.fileList = null;
-             }
+                 if (count > 1) break;
+               }
 
-             if (_currSettings.fileList) {
-               _currSettings.url = '';
+               if (count > 1) {
+                 sharedActions.push(action);
+                 sharedNodes.push(node);
+               } else {
+                 unsharedActions.push(action);
+                 unsharedNodes.push(node);
+               }
              }
+           });
+           _descriptionID += 'no_points.';
+           _descriptionID += _wayIDs.length === 1 ? 'single_way.' : 'multiple_ways.';
 
-             corePreferences('settings-custom-data-url', _currSettings.url);
-             this.blur();
-             modal.close();
-             dispatch$1.call('change', this, _currSettings);
+           if (sharedActions.length) {
+             // if any nodes are shared, only disconnect the selected ways from each other
+             _actions = sharedActions;
+             _disconnectingVertexIds = sharedNodes.map(function (node) {
+               return node.id;
+             });
+             _descriptionID += 'conjoined';
+             _annotationID = 'from_each_other';
+           } else {
+             // if no nodes are shared, disconnect the selected ways from all connected ways
+             _actions = unsharedActions;
+             _disconnectingVertexIds = unsharedNodes.map(function (node) {
+               return node.id;
+             });
+
+             if (_wayIDs.length === 1) {
+               _descriptionID += context.graph().geometry(_wayIDs[0]);
+             } else {
+               _descriptionID += 'separate';
+             }
            }
          }
 
-         return utilRebind(render, dispatch$1, 'on');
-       }
+         var _extent = utilTotalExtent(_disconnectingVertexIds, context.graph());
 
-       function uiSectionDataLayers(context) {
-         var settingsCustomData = uiSettingsCustomData(context).on('change', customChanged);
-         var layers = context.layers();
-         var section = uiSection('data-layers', context).label(_t.html('map_data.data_layers')).disclosureContent(renderDisclosureContent);
+         var operation = function operation() {
+           context.perform(function (graph) {
+             return _actions.reduce(function (graph, action) {
+               return action(graph);
+             }, graph);
+           }, operation.annotation());
+           context.validator().validate();
+         };
 
-         function renderDisclosureContent(selection) {
-           var container = selection.selectAll('.data-layer-container').data([0]);
-           container.enter().append('div').attr('class', 'data-layer-container').merge(container).call(drawOsmItems).call(drawQAItems).call(drawCustomDataItems).call(drawVectorItems) // Beta - Detroit mapping challenge
-           .call(drawPanelItems);
-         }
+         operation.relatedEntityIds = function () {
+           if (_vertexIDs.length) {
+             return _disconnectingWayIds;
+           }
 
-         function showsLayer(which) {
-           var layer = layers.layer(which);
+           return _disconnectingVertexIds;
+         };
 
-           if (layer) {
-             return layer.enabled();
+         operation.available = function () {
+           if (_actions.length === 0) return false;
+           if (_otherIDs.length !== 0) return false;
+           if (_vertexIDs.length !== 0 && _wayIDs.length !== 0 && !_wayIDs.every(function (wayID) {
+             return _vertexIDs.some(function (vertexID) {
+               var way = context.entity(wayID);
+               return way.nodes.indexOf(vertexID) !== -1;
+             });
+           })) return false;
+           return true;
+         };
+
+         operation.disabled = function () {
+           var reason;
+
+           for (var actionIndex in _actions) {
+             reason = _actions[actionIndex].disabled(context.graph());
+             if (reason) return reason;
+           }
+
+           if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large.' + ((_vertexIDs.length ? _vertexIDs : _wayIDs).length === 1 ? 'single' : 'multiple');
+           } else if (_coords && someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
            }
 
            return false;
-         }
 
-         function setLayer(which, enabled) {
-           // Don't allow layer changes while drawing - #6584
-           var mode = context.mode();
-           if (mode && /^draw/.test(mode.id)) return;
-           var layer = layers.layer(which);
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
-           if (layer) {
-             layer.enabled(enabled);
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-             if (!enabled && (which === 'osm' || which === 'notes')) {
-               context.enter(modeBrowse(context));
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
              }
+
+             return false;
            }
-         }
+         };
 
-         function toggleLayer(which) {
-           setLayer(which, !showsLayer(which));
-         }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
 
-         function drawOsmItems(selection) {
-           var osmKeys = ['osm', 'notes'];
-           var osmLayers = layers.all().filter(function (obj) {
-             return osmKeys.indexOf(obj.id) !== -1;
-           });
-           var ul = selection.selectAll('.layer-list-osm').data([0]);
-           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-osm').merge(ul);
-           var li = ul.selectAll('.list-item').data(osmLayers);
-           li.exit().remove();
-           var liEnter = li.enter().append('li').attr('class', function (d) {
-             return 'list-item list-item-' + d.id;
-           });
-           var labelEnter = liEnter.append('label').each(function (d) {
-             if (d.id === 'osm') {
-               select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).keys([uiCmd('⌥' + _t('area_fill.wireframe.key'))]).placement('bottom'));
-             } else {
-               select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
-             }
-           });
-           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
-             toggleLayer(d.id);
-           });
-           labelEnter.append('span').html(function (d) {
-             return _t.html('map_data.layers.' + d.id + '.title');
-           }); // Update
+           if (disable) {
+             return _t('operations.disconnect.' + disable);
+           }
 
-           li.merge(liEnter).classed('active', function (d) {
-             return d.layer.enabled();
-           }).selectAll('input').property('checked', function (d) {
-             return d.layer.enabled();
-           });
-         }
+           return _t('operations.disconnect.description.' + _descriptionID);
+         };
 
-         function drawQAItems(selection) {
-           var qaKeys = ['keepRight', 'improveOSM', 'osmose'];
-           var qaLayers = layers.all().filter(function (obj) {
-             return qaKeys.indexOf(obj.id) !== -1;
-           });
-           var ul = selection.selectAll('.layer-list-qa').data([0]);
-           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-qa').merge(ul);
-           var li = ul.selectAll('.list-item').data(qaLayers);
-           li.exit().remove();
-           var liEnter = li.enter().append('li').attr('class', function (d) {
-             return 'list-item list-item-' + d.id;
-           });
-           var labelEnter = liEnter.append('label').each(function (d) {
-             select(this).call(uiTooltip().title(_t.html('map_data.layers.' + d.id + '.tooltip')).placement('bottom'));
-           });
-           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
-             toggleLayer(d.id);
-           });
-           labelEnter.append('span').html(function (d) {
-             return _t.html('map_data.layers.' + d.id + '.title');
-           }); // Update
+         operation.annotation = function () {
+           return _t('operations.disconnect.annotation.' + _annotationID);
+         };
 
-           li.merge(liEnter).classed('active', function (d) {
-             return d.layer.enabled();
-           }).selectAll('input').property('checked', function (d) {
-             return d.layer.enabled();
-           });
-         } // Beta feature - sample vector layers to support Detroit Mapping Challenge
-         // https://github.com/osmus/detroit-mapping-challenge
+         operation.id = 'disconnect';
+         operation.keys = [_t('operations.disconnect.key')];
+         operation.title = _t('operations.disconnect.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
+       function operationDowngrade(context, selectedIDs) {
+         var _affectedFeatureCount = 0;
 
-         function drawVectorItems(selection) {
-           var dataLayer = layers.layer('data');
-           var vtData = [{
-             name: 'Detroit Neighborhoods/Parks',
-             src: 'neighborhoods-parks',
-             tooltip: 'Neighborhood boundaries and parks as compiled by City of Detroit in concert with community groups.',
-             template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmur6x34562qp9iv1u3ksf-54hev,jonahadkins.cjksmqxdx33jj2wp90xd9x2md-4e5y2/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-           }, {
-             name: 'Detroit Composite POIs',
-             src: 'composite-poi',
-             tooltip: 'Fire Inspections, Business Licenses, and other public location data collated from the City of Detroit.',
-             template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmm6a02sli31myxhsr7zf3-2sw8h/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-           }, {
-             name: 'Detroit All-The-Places POIs',
-             src: 'alltheplaces-poi',
-             tooltip: 'Public domain business location data created by web scrapers.',
-             template: 'https://{switch:a,b,c,d}.tiles.mapbox.com/v4/jonahadkins.cjksmswgk340g2vo06p1w9w0j-8fjjc/{z}/{x}/{y}.vector.pbf?access_token=pk.eyJ1Ijoiam9uYWhhZGtpbnMiLCJhIjoiRlVVVkx3VSJ9.9sdVEK_B_VkEXPjssU5MqA'
-           }]; // Only show this if the map is around Detroit..
+         var _downgradeType = downgradeTypeForEntityIDs(selectedIDs);
 
-           var detroit = geoExtent([-83.5, 42.1], [-82.8, 42.5]);
-           var showVectorItems = context.map().zoom() > 9 && detroit.contains(context.map().center());
-           var container = selection.selectAll('.vectortile-container').data(showVectorItems ? [0] : []);
-           container.exit().remove();
-           var containerEnter = container.enter().append('div').attr('class', 'vectortile-container');
-           containerEnter.append('h4').attr('class', 'vectortile-header').html('Detroit Vector Tiles (Beta)');
-           containerEnter.append('ul').attr('class', 'layer-list layer-list-vectortile');
-           containerEnter.append('div').attr('class', 'vectortile-footer').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/osmus/detroit-mapping-challenge').append('span').html('About these layers');
-           container = container.merge(containerEnter);
-           var ul = container.selectAll('.layer-list-vectortile');
-           var li = ul.selectAll('.list-item').data(vtData);
-           li.exit().remove();
-           var liEnter = li.enter().append('li').attr('class', function (d) {
-             return 'list-item list-item-' + d.src;
-           });
-           var labelEnter = liEnter.append('label').each(function (d) {
-             select(this).call(uiTooltip().title(d.tooltip).placement('top'));
-           });
-           labelEnter.append('input').attr('type', 'radio').attr('name', 'vectortile').on('change', selectVTLayer);
-           labelEnter.append('span').html(function (d) {
-             return d.name;
-           }); // Update
+         var _multi = _affectedFeatureCount === 1 ? 'single' : 'multiple';
 
-           li.merge(liEnter).classed('active', isVTLayerSelected).selectAll('input').property('checked', isVTLayerSelected);
+         function downgradeTypeForEntityIDs(entityIds) {
+           var downgradeType;
+           _affectedFeatureCount = 0;
 
-           function isVTLayerSelected(d) {
-             return dataLayer && dataLayer.template() === d.template;
-           }
+           for (var i in entityIds) {
+             var entityID = entityIds[i];
+             var type = downgradeTypeForEntityID(entityID);
 
-           function selectVTLayer(d3_event, d) {
-             corePreferences('settings-custom-data-url', d.template);
+             if (type) {
+               _affectedFeatureCount += 1;
 
-             if (dataLayer) {
-               dataLayer.template(d.template, d.src);
-               dataLayer.enabled(true);
+               if (downgradeType && type !== downgradeType) {
+                 if (downgradeType !== 'generic' && type !== 'generic') {
+                   downgradeType = 'building_address';
+                 } else {
+                   downgradeType = 'generic';
+                 }
+               } else {
+                 downgradeType = type;
+               }
              }
            }
-         }
-
-         function drawCustomDataItems(selection) {
-           var dataLayer = layers.layer('data');
-           var hasData = dataLayer && dataLayer.hasData();
-           var showsData = hasData && dataLayer.enabled();
-           var ul = selection.selectAll('.layer-list-data').data(dataLayer ? [0] : []); // Exit
-
-           ul.exit().remove(); // Enter
-
-           var ulEnter = ul.enter().append('ul').attr('class', 'layer-list layer-list-data');
-           var liEnter = ulEnter.append('li').attr('class', 'list-item-data');
-           var labelEnter = liEnter.append('label').call(uiTooltip().title(_t.html('map_data.layers.custom.tooltip')).placement('top'));
-           labelEnter.append('input').attr('type', 'checkbox').on('change', function () {
-             toggleLayer('data');
-           });
-           labelEnter.append('span').html(_t.html('map_data.layers.custom.title'));
-           liEnter.append('button').attr('class', 'open-data-options').call(uiTooltip().title(_t.html('settings.custom_data.tooltip')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             editCustom();
-           }).call(svgIcon('#iD-icon-more'));
-           liEnter.append('button').attr('class', 'zoom-to-data').call(uiTooltip().title(_t.html('map_data.layers.custom.zoom')).placement(_mainLocalizer.textDirection() === 'rtl' ? 'right' : 'left')).on('click', function (d3_event) {
-             if (select(this).classed('disabled')) return;
-             d3_event.preventDefault();
-             d3_event.stopPropagation();
-             dataLayer.fitZoom();
-           }).call(svgIcon('#iD-icon-framed-dot', 'monochrome')); // Update
-
-           ul = ul.merge(ulEnter);
-           ul.selectAll('.list-item-data').classed('active', showsData).selectAll('label').classed('deemphasize', !hasData).selectAll('input').property('disabled', !hasData).property('checked', showsData);
-           ul.selectAll('button.zoom-to-data').classed('disabled', !hasData);
-         }
 
-         function editCustom() {
-           context.container().call(settingsCustomData);
+           return downgradeType;
          }
 
-         function customChanged(d) {
-           var dataLayer = layers.layer('data');
+         function downgradeTypeForEntityID(entityID) {
+           var graph = context.graph();
+           var entity = graph.entity(entityID);
+           var preset = _mainPresetIndex.match(entity, graph);
+           if (!preset || preset.isFallback()) return null;
 
-           if (d && d.url) {
-             dataLayer.url(d.url);
-           } else if (d && d.fileList) {
-             dataLayer.fileList(d.fileList);
+           if (entity.type === 'node' && preset.id !== 'address' && Object.keys(entity.tags).some(function (key) {
+             return key.match(/^addr:.{1,}/);
+           })) {
+             return 'address';
            }
-         }
-
-         function drawPanelItems(selection) {
-           var panelsListEnter = selection.selectAll('.md-extras-list').data([0]).enter().append('ul').attr('class', 'layer-list md-extras-list');
-           var historyPanelLabelEnter = panelsListEnter.append('li').attr('class', 'history-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.history_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.history.key'))]).placement('top'));
-           historyPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
-             d3_event.preventDefault();
-             context.ui().info.toggle('history');
-           });
-           historyPanelLabelEnter.append('span').html(_t.html('map_data.history_panel.title'));
-           var measurementPanelLabelEnter = panelsListEnter.append('li').attr('class', 'measurement-panel-toggle-item').append('label').call(uiTooltip().title(_t.html('map_data.measurement_panel.tooltip')).keys([uiCmd('⌘⇧' + _t('info_panels.measurement.key'))]).placement('top'));
-           measurementPanelLabelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
-             d3_event.preventDefault();
-             context.ui().info.toggle('measurement');
-           });
-           measurementPanelLabelEnter.append('span').html(_t.html('map_data.measurement_panel.title'));
-         }
-
-         context.layers().on('change.uiSectionDataLayers', section.reRender);
-         context.map().on('move.uiSectionDataLayers', debounce(function () {
-           // Detroit layers may have moved in or out of view
-           window.requestIdleCallback(section.reRender);
-         }, 1000));
-         return section;
-       }
 
-       function uiSectionMapFeatures(context) {
-         var _features = context.features().keys();
+           var geometry = entity.geometry(graph);
 
-         var section = uiSection('map-features', context).label(_t.html('map_data.map_features')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+           if (geometry === 'area' && entity.tags.building && !preset.tags.building) {
+             return 'building';
+           }
 
-         function renderDisclosureContent(selection) {
-           var container = selection.selectAll('.layer-feature-list-container').data([0]);
-           var containerEnter = container.enter().append('div').attr('class', 'layer-feature-list-container');
-           containerEnter.append('ul').attr('class', 'layer-list layer-feature-list');
-           var footer = containerEnter.append('div').attr('class', 'feature-list-links section-footer');
-           footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.disable_all')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             context.features().disableAll();
-           });
-           footer.append('a').attr('class', 'feature-list-link').attr('href', '#').html(_t.html('issues.enable_all')).on('click', function (d3_event) {
-             d3_event.preventDefault();
-             context.features().enableAll();
-           }); // Update
+           if (geometry === 'vertex' && Object.keys(entity.tags).length) {
+             return 'generic';
+           }
 
-           container = container.merge(containerEnter);
-           container.selectAll('.layer-feature-list').call(drawListItems, _features, 'checkbox', 'feature', clickFeature, showsFeature);
+           return null;
          }
 
-         function drawListItems(selection, data, type, name, change, active) {
-           var items = selection.selectAll('li').data(data); // Exit
-
-           items.exit().remove(); // Enter
-
-           var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
-             var tip = _t.html(name + '.' + d + '.tooltip');
+         var buildingKeysToKeep = ['architect', 'building', 'height', 'layer', 'source', 'type', 'wheelchair'];
+         var addressKeysToKeep = ['source'];
 
-             if (autoHiddenFeature(d)) {
-               var msg = showsLayer('osm') ? _t.html('map_data.autohidden') : _t.html('map_data.osmhidden');
-               tip += '<div>' + msg + '</div>';
-             }
+         var operation = function operation() {
+           context.perform(function (graph) {
+             for (var i in selectedIDs) {
+               var entityID = selectedIDs[i];
+               var type = downgradeTypeForEntityID(entityID);
+               if (!type) continue;
+               var tags = Object.assign({}, graph.entity(entityID).tags); // shallow copy
 
-             return tip;
-           }).placement('top'));
-           var label = enter.append('label');
-           label.append('input').attr('type', type).attr('name', name).on('change', change);
-           label.append('span').html(function (d) {
-             return _t.html(name + '.' + d + '.description');
-           }); // Update
+               for (var key in tags) {
+                 if (type === 'address' && addressKeysToKeep.indexOf(key) !== -1) continue;
 
-           items = items.merge(enter);
-           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', autoHiddenFeature);
-         }
+                 if (type === 'building') {
+                   if (buildingKeysToKeep.indexOf(key) !== -1 || key.match(/^building:.{1,}/) || key.match(/^roof:.{1,}/)) continue;
+                 }
 
-         function autoHiddenFeature(d) {
-           return context.features().autoHidden(d);
-         }
+                 if (type !== 'generic') {
+                   if (key.match(/^addr:.{1,}/) || key.match(/^source:.{1,}/)) continue;
+                 }
 
-         function showsFeature(d) {
-           return context.features().enabled(d);
-         }
+                 delete tags[key];
+               }
 
-         function clickFeature(d3_event, d) {
-           context.features().toggle(d);
-         }
+               graph = actionChangeTags(entityID, tags)(graph);
+             }
 
-         function showsLayer(id) {
-           var layer = context.layers().layer(id);
-           return layer && layer.enabled();
-         } // add listeners
+             return graph;
+           }, operation.annotation());
+           context.validator().validate(); // refresh the select mode to enable the delete operation
 
+           context.enter(modeSelect(context, selectedIDs));
+         };
 
-         context.features().on('change.map_features', section.reRender);
-         return section;
-       }
+         operation.available = function () {
+           return _downgradeType;
+         };
 
-       function uiSectionMapStyleOptions(context) {
-         var section = uiSection('fill-area', context).label(_t.html('map_data.style_options')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+         operation.disabled = function () {
+           if (selectedIDs.some(hasWikidataTag)) {
+             return 'has_wikidata_tag';
+           }
 
-         function renderDisclosureContent(selection) {
-           var container = selection.selectAll('.layer-fill-list').data([0]);
-           container.enter().append('ul').attr('class', 'layer-list layer-fill-list').merge(container).call(drawListItems, context.map().areaFillOptions, 'radio', 'area_fill', setFill, isActiveFill);
-           var container2 = selection.selectAll('.layer-visual-diff-list').data([0]);
-           container2.enter().append('ul').attr('class', 'layer-list layer-visual-diff-list').merge(container2).call(drawListItems, ['highlight_edits'], 'checkbox', 'visual_diff', toggleHighlightEdited, function () {
-             return context.surface().classed('highlight-edited');
-           });
-         }
+           return false;
 
-         function drawListItems(selection, data, type, name, change, active) {
-           var items = selection.selectAll('li').data(data); // Exit
+           function hasWikidataTag(id) {
+             var entity = context.entity(id);
+             return entity.tags.wikidata && entity.tags.wikidata.trim().length > 0;
+           }
+         };
 
-           items.exit().remove(); // Enter
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.downgrade.' + disable + '.' + _multi) : _t('operations.downgrade.description.' + _downgradeType);
+         };
 
-           var enter = items.enter().append('li').call(uiTooltip().title(function (d) {
-             return _t.html(name + '.' + d + '.tooltip');
-           }).keys(function (d) {
-             var key = d === 'wireframe' ? _t('area_fill.wireframe.key') : null;
-             if (d === 'highlight_edits') key = _t('map_data.highlight_edits.key');
-             return key ? [key] : null;
-           }).placement('top'));
-           var label = enter.append('label');
-           label.append('input').attr('type', type).attr('name', name).on('change', change);
-           label.append('span').html(function (d) {
-             return _t.html(name + '.' + d + '.description');
-           }); // Update
+         operation.annotation = function () {
+           var suffix;
 
-           items = items.merge(enter);
-           items.classed('active', active).selectAll('input').property('checked', active).property('indeterminate', false);
-         }
+           if (_downgradeType === 'building_address') {
+             suffix = 'generic';
+           } else {
+             suffix = _downgradeType;
+           }
 
-         function isActiveFill(d) {
-           return context.map().activeAreaFill() === d;
-         }
+           return _t('operations.downgrade.annotation.' + suffix, {
+             n: _affectedFeatureCount
+           });
+         };
 
-         function toggleHighlightEdited(d3_event) {
-           d3_event.preventDefault();
-           context.map().toggleHighlightEdited();
-         }
+         operation.id = 'downgrade';
+         operation.keys = [uiCmd('⌫')];
+         operation.title = _t('operations.downgrade.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         function setFill(d3_event, d) {
-           context.map().activeAreaFill(d);
-         }
+       function operationExtract(context, selectedIDs) {
+         var _amount = selectedIDs.length === 1 ? 'single' : 'multiple';
 
-         context.map().on('changeHighlighting.ui_style, changeAreaFill.ui_style', section.reRender);
-         return section;
-       }
+         var _geometries = utilArrayUniq(selectedIDs.map(function (entityID) {
+           return context.graph().hasEntity(entityID) && context.graph().geometry(entityID);
+         }).filter(Boolean));
 
-       function uiSectionPhotoOverlays(context) {
-         var layers = context.layers();
-         var section = uiSection('photo-overlays', context).label(_t.html('photo_overlays.title')).disclosureContent(renderDisclosureContent).expandedByDefault(false);
+         var _geometryID = _geometries.length === 1 ? _geometries[0] : 'feature';
 
-         function renderDisclosureContent(selection) {
-           var container = selection.selectAll('.photo-overlay-container').data([0]);
-           container.enter().append('div').attr('class', 'photo-overlay-container').merge(container).call(drawPhotoItems).call(drawPhotoTypeItems).call(drawDateFilter).call(drawUsernameFilter);
-         }
+         var _extent;
 
-         function drawPhotoItems(selection) {
-           var photoKeys = context.photos().overlayLayerIDs();
-           var photoLayers = layers.all().filter(function (obj) {
-             return photoKeys.indexOf(obj.id) !== -1;
-           });
-           var data = photoLayers.filter(function (obj) {
-             return obj.layer.supported();
-           });
+         var _actions = selectedIDs.map(function (entityID) {
+           var graph = context.graph();
+           var entity = graph.hasEntity(entityID);
+           if (!entity || !entity.hasInterestingTags()) return null;
+           if (entity.type === 'node' && graph.parentWays(entity).length === 0) return null;
 
-           function layerSupported(d) {
-             return d.layer && d.layer.supported();
-           }
+           if (entity.type !== 'node') {
+             var preset = _mainPresetIndex.match(entity, graph); // only allow extraction from ways/relations if the preset supports points
 
-           function layerEnabled(d) {
-             return layerSupported(d) && d.layer.enabled();
+             if (preset.geometry.indexOf('point') === -1) return null;
            }
 
-           var ul = selection.selectAll('.layer-list-photos').data([0]);
-           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photos').merge(ul);
-           var li = ul.selectAll('.list-item-photos').data(data);
-           li.exit().remove();
-           var liEnter = li.enter().append('li').attr('class', function (d) {
-             var classes = 'list-item-photos list-item-' + d.id;
+           _extent = _extent ? _extent.extend(entity.extent(graph)) : entity.extent(graph);
+           return actionExtract(entityID, context.projection);
+         }).filter(Boolean);
 
-             if (d.id === 'mapillary-signs' || d.id === 'mapillary-map-features') {
-               classes += ' indented';
-             }
+         var operation = function operation() {
+           var combinedAction = function combinedAction(graph) {
+             _actions.forEach(function (action) {
+               graph = action(graph);
+             });
 
-             return classes;
-           });
-           var labelEnter = liEnter.append('label').each(function (d) {
-             var titleID;
-             if (d.id === 'mapillary-signs') titleID = 'mapillary.signs.tooltip';else if (d.id === 'mapillary') titleID = 'mapillary_images.tooltip';else if (d.id === 'openstreetcam') titleID = 'openstreetcam_images.tooltip';else titleID = d.id.replace(/-/g, '_') + '.tooltip';
-             select(this).call(uiTooltip().title(_t.html(titleID)).placement('top'));
-           });
-           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
-             toggleLayer(d.id);
+             return graph;
+           };
+
+           context.perform(combinedAction, operation.annotation()); // do the extract
+
+           var extractedNodeIDs = _actions.map(function (action) {
+             return action.getExtractedNodeID();
            });
-           labelEnter.append('span').html(function (d) {
-             var id = d.id;
-             if (id === 'mapillary-signs') id = 'photo_overlays.traffic_signs';
-             return _t.html(id.replace(/-/g, '_') + '.title');
-           }); // Update
 
-           li.merge(liEnter).classed('active', layerEnabled).selectAll('input').property('checked', layerEnabled);
-         }
+           context.enter(modeSelect(context, extractedNodeIDs));
+         };
 
-         function drawPhotoTypeItems(selection) {
-           var data = context.photos().allPhotoTypes();
+         operation.available = function () {
+           return _actions.length && selectedIDs.length === _actions.length;
+         };
 
-           function typeEnabled(d) {
-             return context.photos().showsPhotoType(d);
+         operation.disabled = function () {
+           if (_extent && _extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (selectedIDs.some(function (entityID) {
+             return context.graph().geometry(entityID) === 'vertex' && context.hasHiddenConnections(entityID);
+           })) {
+             return 'connected_to_hidden';
            }
 
-           var ul = selection.selectAll('.layer-list-photo-types').data([0]);
-           ul.exit().remove();
-           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-photo-types').merge(ul);
-           var li = ul.selectAll('.list-item-photo-types').data(context.photos().shouldFilterByPhotoType() ? data : []);
-           li.exit().remove();
-           var liEnter = li.enter().append('li').attr('class', function (d) {
-             return 'list-item-photo-types list-item-' + d;
-           });
-           var labelEnter = liEnter.append('label').each(function (d) {
-             select(this).call(uiTooltip().title(_t.html('photo_overlays.photo_type.' + d + '.tooltip')).placement('top'));
-           });
-           labelEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event, d) {
-             context.photos().togglePhotoType(d);
-           });
-           labelEnter.append('span').html(function (d) {
-             return _t.html('photo_overlays.photo_type.' + d + '.title');
-           }); // Update
-
-           li.merge(liEnter).classed('active', typeEnabled).selectAll('input').property('checked', typeEnabled);
-         }
+           return false;
+         };
 
-         function drawDateFilter(selection) {
-           var data = context.photos().dateFilters();
+         operation.tooltip = function () {
+           var disableReason = operation.disabled();
 
-           function filterEnabled(d) {
-             return context.photos().dateFilterValue(d);
+           if (disableReason) {
+             return _t('operations.extract.' + disableReason + '.' + _amount);
+           } else {
+             return _t('operations.extract.description.' + _geometryID + '.' + _amount);
            }
+         };
 
-           var ul = selection.selectAll('.layer-list-date-filter').data([0]);
-           ul.exit().remove();
-           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-date-filter').merge(ul);
-           var li = ul.selectAll('.list-item-date-filter').data(context.photos().shouldFilterByDate() ? data : []);
-           li.exit().remove();
-           var liEnter = li.enter().append('li').attr('class', 'list-item-date-filter');
-           var labelEnter = liEnter.append('label').each(function (d) {
-             select(this).call(uiTooltip().title(_t.html('photo_overlays.date_filter.' + d + '.tooltip')).placement('top'));
-           });
-           labelEnter.append('span').html(function (d) {
-             return _t.html('photo_overlays.date_filter.' + d + '.title');
+         operation.annotation = function () {
+           return _t('operations.extract.annotation', {
+             n: selectedIDs.length
            });
-           labelEnter.append('input').attr('type', 'date').attr('class', 'list-item-input').attr('placeholder', _t('units.year_month_day')).call(utilNoAuto).each(function (d) {
-             utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
-           }).on('change', function (d3_event, d) {
-             var value = utilGetSetValue(select(this)).trim();
-             context.photos().setDateFilter(d, value, true); // reload the displayed dates
+         };
 
-             li.selectAll('input').each(function (d) {
-               utilGetSetValue(select(this), context.photos().dateFilterValue(d) || '');
-             });
-           });
-           li = li.merge(liEnter).classed('active', filterEnabled);
+         operation.id = 'extract';
+         operation.keys = [_t('operations.extract.key')];
+         operation.title = _t('operations.extract.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
+
+       function operationMerge(context, selectedIDs) {
+         var _action = getAction();
+
+         function getAction() {
+           // prefer a non-disabled action first
+           var join = actionJoin(selectedIDs);
+           if (!join.disabled(context.graph())) return join;
+           var merge = actionMerge(selectedIDs);
+           if (!merge.disabled(context.graph())) return merge;
+           var mergePolygon = actionMergePolygon(selectedIDs);
+           if (!mergePolygon.disabled(context.graph())) return mergePolygon;
+           var mergeNodes = actionMergeNodes(selectedIDs);
+           if (!mergeNodes.disabled(context.graph())) return mergeNodes; // otherwise prefer an action with an interesting disabled reason
+
+           if (join.disabled(context.graph()) !== 'not_eligible') return join;
+           if (merge.disabled(context.graph()) !== 'not_eligible') return merge;
+           if (mergePolygon.disabled(context.graph()) !== 'not_eligible') return mergePolygon;
+           return mergeNodes;
          }
 
-         function drawUsernameFilter(selection) {
-           function filterEnabled() {
-             return context.photos().usernames();
+         var operation = function operation() {
+           if (operation.disabled()) return;
+           context.perform(_action, operation.annotation());
+           context.validator().validate();
+           var resultIDs = selectedIDs.filter(context.hasEntity);
+
+           if (resultIDs.length > 1) {
+             var interestingIDs = resultIDs.filter(function (id) {
+               return context.entity(id).hasInterestingTags();
+             });
+             if (interestingIDs.length) resultIDs = interestingIDs;
            }
 
-           var ul = selection.selectAll('.layer-list-username-filter').data([0]);
-           ul.exit().remove();
-           ul = ul.enter().append('ul').attr('class', 'layer-list layer-list-username-filter').merge(ul);
-           var li = ul.selectAll('.list-item-username-filter').data(context.photos().shouldFilterByUsername() ? ['username-filter'] : []);
-           li.exit().remove();
-           var liEnter = li.enter().append('li').attr('class', 'list-item-username-filter');
-           var labelEnter = liEnter.append('label').each(function () {
-             select(this).call(uiTooltip().title(_t.html('photo_overlays.username_filter.tooltip')).placement('top'));
-           });
-           labelEnter.append('span').html(_t.html('photo_overlays.username_filter.title'));
-           labelEnter.append('input').attr('type', 'text').attr('class', 'list-item-input').call(utilNoAuto).property('value', usernameValue).on('change', function () {
-             var value = select(this).property('value');
-             context.photos().setUsernameFilter(value, true);
-             select(this).property('value', usernameValue);
-           });
-           li.merge(liEnter).classed('active', filterEnabled);
+           context.enter(modeSelect(context, resultIDs));
+         };
 
-           function usernameValue() {
-             var usernames = context.photos().usernames();
-             if (usernames) return usernames.join('; ');
-             return usernames;
-           }
-         }
+         operation.available = function () {
+           return selectedIDs.length >= 2;
+         };
 
-         function toggleLayer(which) {
-           setLayer(which, !showsLayer(which));
-         }
+         operation.disabled = function () {
+           var actionDisabled = _action.disabled(context.graph());
 
-         function showsLayer(which) {
-           var layer = layers.layer(which);
+           if (actionDisabled) return actionDisabled;
+           var osm = context.connection();
 
-           if (layer) {
-             return layer.enabled();
+           if (osm && _action.resultingWayNodesLength && _action.resultingWayNodesLength(context.graph()) > osm.maxWayNodes()) {
+             return 'too_many_vertices';
            }
 
            return false;
-         }
+         };
 
-         function setLayer(which, enabled) {
-           var layer = layers.layer(which);
+         operation.tooltip = function () {
+           var disabled = operation.disabled();
 
-           if (layer) {
-             layer.enabled(enabled);
+           if (disabled) {
+             if (disabled === 'conflicting_relations') {
+               return _t('operations.merge.conflicting_relations');
+             }
+
+             if (disabled === 'restriction' || disabled === 'connectivity') {
+               return _t('operations.merge.damage_relation', {
+                 relation: _mainPresetIndex.item('type/' + disabled).name()
+               });
+             }
+
+             return _t('operations.merge.' + disabled);
            }
-         }
 
-         context.layers().on('change.uiSectionPhotoOverlays', section.reRender);
-         context.photos().on('change.uiSectionPhotoOverlays', section.reRender);
-         return section;
-       }
+           return _t('operations.merge.description');
+         };
 
-       function uiPaneMapData(context) {
-         var mapDataPane = uiPane('map-data', context).key(_t('map_data.key')).label(_t.html('map_data.title')).description(_t.html('map_data.description')).iconName('iD-icon-data').sections([uiSectionDataLayers(context), uiSectionPhotoOverlays(context), uiSectionMapStyleOptions(context), uiSectionMapFeatures(context)]);
-         return mapDataPane;
-       }
+         operation.annotation = function () {
+           return _t('operations.merge.annotation', {
+             n: selectedIDs.length
+           });
+         };
 
-       function uiSectionPrivacy(context) {
-         var section = uiSection('preferences-third-party', context).label(_t.html('preferences.privacy.title')).disclosureContent(renderDisclosureContent);
+         operation.id = 'merge';
+         operation.keys = [_t('operations.merge.key')];
+         operation.title = _t('operations.merge.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         var _showThirdPartyIcons = corePreferences('preferences.privacy.thirdpartyicons') || 'true';
+       function operationPaste(context) {
+         var _pastePoint;
 
-         function renderDisclosureContent(selection) {
-           // enter
-           var privacyOptionsListEnter = selection.selectAll('.privacy-options-list').data([0]).enter().append('ul').attr('class', 'layer-list privacy-options-list');
-           var thirdPartyIconsEnter = privacyOptionsListEnter.append('li').attr('class', 'privacy-third-party-icons-item').append('label').call(uiTooltip().title(_t.html('preferences.privacy.third_party_icons.tooltip')).placement('bottom'));
-           thirdPartyIconsEnter.append('input').attr('type', 'checkbox').on('change', function (d3_event) {
-             d3_event.preventDefault();
-             _showThirdPartyIcons = _showThirdPartyIcons === 'true' ? 'false' : 'true';
-             corePreferences('preferences.privacy.thirdpartyicons', _showThirdPartyIcons);
-             update();
+         var operation = function operation() {
+           if (!_pastePoint) return;
+           var oldIDs = context.copyIDs();
+           if (!oldIDs.length) return;
+           var projection = context.projection;
+           var extent = geoExtent();
+           var oldGraph = context.copyGraph();
+           var newIDs = [];
+           var action = actionCopyEntities(oldIDs, oldGraph);
+           context.perform(action);
+           var copies = action.copies();
+           var originals = new Set();
+           Object.values(copies).forEach(function (entity) {
+             originals.add(entity.id);
            });
-           thirdPartyIconsEnter.append('span').html(_t.html('preferences.privacy.third_party_icons.description')); // Privacy Policy link
 
-           selection.selectAll('.privacy-link').data([0]).enter().append('div').attr('class', 'privacy-link').append('a').attr('target', '_blank').call(svgIcon('#iD-icon-out-link', 'inline')).attr('href', 'https://github.com/openstreetmap/iD/blob/release/PRIVACY.md').append('span').html(_t.html('preferences.privacy.privacy_link'));
-           update();
+           for (var id in copies) {
+             var oldEntity = oldGraph.entity(id);
+             var newEntity = copies[id];
 
-           function update() {
-             selection.selectAll('.privacy-third-party-icons-item').classed('active', _showThirdPartyIcons === 'true').select('input').property('checked', _showThirdPartyIcons === 'true');
-           }
-         }
+             extent._extend(oldEntity.extent(oldGraph)); // Exclude child nodes from newIDs if their parent way was also copied.
 
-         return section;
-       }
 
-       function uiPanePreferences(context) {
-         var preferencesPane = uiPane('preferences', context).key(_t('preferences.key')).label(_t.html('preferences.title')).description(_t.html('preferences.description')).iconName('fas-user-cog').sections([uiSectionPrivacy(context)]);
-         return preferencesPane;
-       }
+             var parents = context.graph().parentWays(newEntity);
+             var parentCopied = parents.some(function (parent) {
+               return originals.has(parent.id);
+             });
 
-       function uiInit(context) {
-         var _initCounter = 0;
-         var _needWidth = {};
+             if (!parentCopied) {
+               newIDs.push(newEntity.id);
+             }
+           } // Use the location of the copy operation to offset the paste location,
+           // or else use the center of the pasted extent
 
-         var _lastPointerType;
 
-         function render(container) {
-           container.on('click.ui', function (d3_event) {
-             // we're only concerned with the primary mouse button
-             if (d3_event.button !== 0) return;
-             if (!d3_event.composedPath) return; // some targets have default click events we don't want to override
+           var copyPoint = context.copyLonLat() && projection(context.copyLonLat()) || projection(extent.center());
+           var delta = geoVecSubtract(_pastePoint, copyPoint); // Move the pasted objects to be anchored at the paste location
 
-             var isOkayTarget = d3_event.composedPath().some(function (node) {
-               // we only care about element nodes
-               return node.nodeType === 1 && ( // clicking <input> focuses it and/or changes a value
-               node.nodeName === 'INPUT' || // clicking <label> affects its <input> by default
-               node.nodeName === 'LABEL' || // clicking <a> opens a hyperlink by default
-               node.nodeName === 'A');
-             });
-             if (isOkayTarget) return; // disable double-tap-to-zoom on touchscreens
+           context.replace(actionMove(newIDs, delta, projection), operation.annotation());
+           context.enter(modeSelect(context, newIDs));
+         };
 
-             d3_event.preventDefault();
-           });
-           var detected = utilDetect(); // only WebKit supports gesture events
+         operation.point = function (val) {
+           _pastePoint = val;
+           return operation;
+         };
 
-           if ('GestureEvent' in window && // Listening for gesture events on iOS 13.4+ breaks double-tapping,
-           // but we only need to do this on desktop Safari anyway. – #7694
-           !detected.isMobileWebKit) {
-             // On iOS we disable pinch-to-zoom of the UI via the `touch-action`
-             // CSS property, but on desktop Safari we need to manually cancel the
-             // default gesture events.
-             container.on('gesturestart.ui gesturechange.ui gestureend.ui', function (d3_event) {
-               // disable pinch-to-zoom of the UI via multitouch trackpads on macOS Safari
-               d3_event.preventDefault();
-             });
-           }
+         operation.available = function () {
+           return context.mode().id === 'browse';
+         };
 
-           if ('PointerEvent' in window) {
-             select(window).on('pointerdown.ui pointerup.ui', function (d3_event) {
-               var pointerType = d3_event.pointerType || 'mouse';
+         operation.disabled = function () {
+           return !context.copyIDs().length;
+         };
 
-               if (_lastPointerType !== pointerType) {
-                 _lastPointerType = pointerType;
-                 container.attr('pointer', pointerType);
-               }
-             }, true);
-           } else {
-             _lastPointerType = 'mouse';
-             container.attr('pointer', 'mouse');
-           }
+         operation.tooltip = function () {
+           var oldGraph = context.copyGraph();
+           var ids = context.copyIDs();
 
-           container.attr('lang', _mainLocalizer.localeCode()).attr('dir', _mainLocalizer.textDirection()); // setup fullscreen keybindings (no button shown at this time)
+           if (!ids.length) {
+             return _t('operations.paste.nothing_copied');
+           }
 
-           container.call(uiFullScreen(context));
-           var map = context.map();
-           map.redrawEnable(false); // don't draw until we've set zoom/lat/long
+           return _t('operations.paste.description', {
+             feature: utilDisplayLabel(oldGraph.entity(ids[0]), oldGraph),
+             n: ids.length
+           });
+         };
 
-           map.on('hitMinZoom.ui', function () {
-             ui.flash.iconName('#iD-icon-no').label(_t.html('cannot_zoom'))();
+         operation.annotation = function () {
+           var ids = context.copyIDs();
+           return _t('operations.paste.annotation', {
+             n: ids.length
            });
-           container.append('svg').attr('id', 'ideditor-defs').call(ui.svgDefs);
-           container.append('div').attr('class', 'sidebar').call(ui.sidebar);
-           var content = container.append('div').attr('class', 'main-content active'); // Top toolbar
+         };
 
-           content.append('div').attr('class', 'top-toolbar-wrap').append('div').attr('class', 'top-toolbar fillD').call(uiTopToolbar(context));
-           content.append('div').attr('class', 'main-map').attr('dir', 'ltr').call(map);
-           var overMap = content.append('div').attr('class', 'over-map'); // HACK: Mobile Safari 14 likes to select anything selectable when long-
-           // pressing, even if it's not targeted. This conflicts with long-pressing
-           // to show the edit menu. We add a selectable offscreen element as the first
-           // child to trick Safari into not showing the selection UI.
+         operation.id = 'paste';
+         operation.keys = [uiCmd('⌘V')];
+         operation.title = _t('operations.paste.title');
+         return operation;
+       }
 
-           overMap.append('div').attr('class', 'select-trap').text('t');
-           overMap.call(uiMapInMap(context)).call(uiNotice(context));
-           overMap.append('div').attr('class', 'spinner').call(uiSpinner(context)); // Map controls
+       function operationReverse(context, selectedIDs) {
+         var operation = function operation() {
+           context.perform(function combinedReverseAction(graph) {
+             actions().forEach(function (action) {
+               graph = action(graph);
+             });
+             return graph;
+           }, operation.annotation());
+           context.validator().validate();
+         };
 
-           var controls = overMap.append('div').attr('class', 'map-controls');
-           controls.append('div').attr('class', 'map-control zoombuttons').call(uiZoom(context));
-           controls.append('div').attr('class', 'map-control zoom-to-selection-control').call(uiZoomToSelection(context));
-           controls.append('div').attr('class', 'map-control geolocate-control').call(uiGeolocate(context)); // Add panes
-           // This should happen after map is initialized, as some require surface()
+         function actions(situation) {
+           return selectedIDs.map(function (entityID) {
+             var entity = context.hasEntity(entityID);
+             if (!entity) return null;
 
-           var panes = overMap.append('div').attr('class', 'map-panes');
-           var uiPanes = [uiPaneBackground(context), uiPaneMapData(context), uiPaneIssues(context), uiPanePreferences(context), uiPaneHelp(context)];
-           uiPanes.forEach(function (pane) {
-             controls.append('div').attr('class', 'map-control map-pane-control ' + pane.id + '-control').call(pane.renderToggleButton);
-             panes.call(pane.renderPane);
-           });
-           ui.info = uiInfo(context);
-           overMap.call(ui.info);
-           overMap.append('div').attr('class', 'photoviewer').classed('al', true) // 'al'=left,  'ar'=right
-           .classed('hide', true).call(ui.photoviewer);
-           overMap.append('div').attr('class', 'attribution-wrap').attr('dir', 'ltr').call(uiAttribution(context)); // Add footer
+             if (situation === 'toolbar') {
+               if (entity.type === 'way' && !entity.isOneWay() && !entity.isSided()) return null;
+             }
 
-           var about = content.append('div').attr('class', 'map-footer');
-           about.append('div').attr('class', 'api-status').call(uiStatus(context));
-           var footer = about.append('div').attr('class', 'map-footer-bar fillD');
-           footer.append('div').attr('class', 'flash-wrap footer-hide');
-           var footerWrap = footer.append('div').attr('class', 'main-footer-wrap footer-show');
-           footerWrap.append('div').attr('class', 'scale-block').call(uiScale(context));
-           var aboutList = footerWrap.append('div').attr('class', 'info-block').append('ul').attr('class', 'map-footer-list');
-           aboutList.append('li').attr('class', 'user-list').call(uiContributors(context));
-           var apiConnections = context.apiConnections();
+             var geometry = entity.geometry(context.graph());
+             if (entity.type !== 'node' && geometry !== 'line') return null;
+             var action = actionReverse(entityID);
+             if (action.disabled(context.graph())) return null;
+             return action;
+           }).filter(Boolean);
+         }
 
-           if (apiConnections && apiConnections.length > 1) {
-             aboutList.append('li').attr('class', 'source-switch').call(uiSourceSwitch(context).keys(apiConnections));
-           }
+         function reverseTypeID() {
+           var acts = actions();
+           var nodeActionCount = acts.filter(function (act) {
+             var entity = context.hasEntity(act.entityID());
+             return entity && entity.type === 'node';
+           }).length;
+           if (nodeActionCount === 0) return 'line';
+           if (nodeActionCount === acts.length) return 'point';
+           return 'feature';
+         }
 
-           aboutList.append('li').attr('class', 'issues-info').call(uiIssuesInfo(context));
-           aboutList.append('li').attr('class', 'feature-warning').call(uiFeatureInfo(context));
-           var issueLinks = aboutList.append('li');
-           issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/issues').call(svgIcon('#iD-icon-bug', 'light')).call(uiTooltip().title(_t.html('report_a_bug')).placement('top'));
-           issueLinks.append('a').attr('target', '_blank').attr('href', 'https://github.com/openstreetmap/iD/blob/develop/CONTRIBUTING.md#translating').call(svgIcon('#iD-icon-translate', 'light')).call(uiTooltip().title(_t.html('help_translate')).placement('top'));
-           aboutList.append('li').attr('class', 'version').call(uiVersion(context));
+         operation.available = function (situation) {
+           return actions(situation).length > 0;
+         };
+
+         operation.disabled = function () {
+           return false;
+         };
+
+         operation.tooltip = function () {
+           return _t('operations.reverse.description.' + reverseTypeID());
+         };
+
+         operation.annotation = function () {
+           var acts = actions();
+           return _t('operations.reverse.annotation.' + reverseTypeID(), {
+             n: acts.length
+           });
+         };
+
+         operation.id = 'reverse';
+         operation.keys = [_t('operations.reverse.key')];
+         operation.title = _t('operations.reverse.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-           if (!context.embed()) {
-             aboutList.call(uiAccount(context));
-           } // Setup map dimensions and move map to initial center/zoom.
-           // This should happen after .main-content and toolbars exist.
+       function operationSplit(context, selectedIDs) {
+         var _vertexIds = selectedIDs.filter(function (id) {
+           return context.graph().geometry(id) === 'vertex';
+         });
 
+         var _selectedWayIds = selectedIDs.filter(function (id) {
+           var entity = context.graph().hasEntity(id);
+           return entity && entity.type === 'way';
+         });
 
-           ui.onResize();
-           map.redrawEnable(true);
-           ui.hash = behaviorHash(context);
-           ui.hash();
+         var _isAvailable = _vertexIds.length > 0 && _vertexIds.length + _selectedWayIds.length === selectedIDs.length;
 
-           if (!ui.hash.hadHash) {
-             map.centerZoom([0, 0], 2);
-           } // Bind events
+         var _action = actionSplit(_vertexIds);
 
+         var _ways = [];
+         var _geometry = 'feature';
+         var _waysAmount = 'single';
 
-           window.onbeforeunload = function () {
-             return context.save();
-           };
+         var _nodesAmount = _vertexIds.length === 1 ? 'single' : 'multiple';
 
-           window.onunload = function () {
-             context.history().unlock();
-           };
+         if (_isAvailable) {
+           if (_selectedWayIds.length) _action.limitWays(_selectedWayIds);
+           _ways = _action.ways(context.graph());
+           var geometries = {};
 
-           select(window).on('resize.editor', function () {
-             ui.onResize();
+           _ways.forEach(function (way) {
+             geometries[way.geometry(context.graph())] = true;
            });
-           var panPixels = 80;
-           context.keybinding().on('⌫', function (d3_event) {
-             d3_event.preventDefault();
-           }).on([_t('sidebar.key'), '`', '²', '@'], ui.sidebar.toggle) // #5663, #6864 - common QWERTY, AZERTY
-           .on('←', pan([panPixels, 0])).on('↑', pan([0, panPixels])).on('→', pan([-panPixels, 0])).on('↓', pan([0, -panPixels])).on(uiCmd('⌥←'), pan([map.dimensions()[0], 0])).on(uiCmd('⌥↑'), pan([0, map.dimensions()[1]])).on(uiCmd('⌥→'), pan([-map.dimensions()[0], 0])).on(uiCmd('⌥↓'), pan([0, -map.dimensions()[1]])).on(uiCmd('⌘' + _t('background.key')), function quickSwitch(d3_event) {
-             if (d3_event) {
-               d3_event.stopImmediatePropagation();
-               d3_event.preventDefault();
-             }
 
-             var previousBackground = context.background().findSource(corePreferences('background-last-used-toggle'));
+           if (Object.keys(geometries).length === 1) {
+             _geometry = Object.keys(geometries)[0];
+           }
 
-             if (previousBackground) {
-               var currentBackground = context.background().baseLayerSource();
-               corePreferences('background-last-used-toggle', currentBackground.id);
-               corePreferences('background-last-used', previousBackground.id);
-               context.background().baseLayerSource(previousBackground);
-             }
-           }).on(_t('area_fill.wireframe.key'), function toggleWireframe(d3_event) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation();
-             context.map().toggleWireframe();
-           }).on(uiCmd('⌥' + _t('area_fill.wireframe.key')), function toggleOsmData(d3_event) {
-             d3_event.preventDefault();
-             d3_event.stopPropagation(); // Don't allow layer changes while drawing - #6584
+           _waysAmount = _ways.length === 1 ? 'single' : 'multiple';
+         }
 
-             var mode = context.mode();
-             if (mode && /^draw/.test(mode.id)) return;
-             var layer = context.layers().layer('osm');
+         var operation = function operation() {
+           var difference = context.perform(_action, operation.annotation()); // select both the nodes and the ways so the mapper can immediately disconnect them if desired
 
-             if (layer) {
-               layer.enabled(!layer.enabled());
+           var idsToSelect = _vertexIds.concat(difference.extantIDs().filter(function (id) {
+             // filter out relations that may have had member additions
+             return context.entity(id).type === 'way';
+           }));
 
-               if (!layer.enabled()) {
-                 context.enter(modeBrowse(context));
-               }
-             }
-           }).on(_t('map_data.highlight_edits.key'), function toggleHighlightEdited(d3_event) {
-             d3_event.preventDefault();
-             context.map().toggleHighlightEdited();
-           });
-           context.on('enter.editor', function (entered) {
-             container.classed('mode-' + entered.id, true);
-           }).on('exit.editor', function (exited) {
-             container.classed('mode-' + exited.id, false);
-           });
-           context.enter(modeBrowse(context));
+           context.enter(modeSelect(context, idsToSelect));
+         };
 
-           if (!_initCounter++) {
-             if (!ui.hash.startWalkthrough) {
-               context.container().call(uiSplash(context)).call(uiRestore(context));
-             }
+         operation.relatedEntityIds = function () {
+           return _selectedWayIds.length ? [] : _ways.map(function (way) {
+             return way.id;
+           });
+         };
 
-             context.container().call(ui.shortcuts);
-           }
+         operation.available = function () {
+           return _isAvailable;
+         };
 
-           var osm = context.connection();
-           var auth = uiLoading(context).message(_t.html('loading_auth')).blocking(true);
+         operation.disabled = function () {
+           var reason = _action.disabled(context.graph());
 
-           if (osm && auth) {
-             osm.on('authLoading.ui', function () {
-               context.container().call(auth);
-             }).on('authDone.ui', function () {
-               auth.close();
-             });
+           if (reason) {
+             return reason;
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
            }
 
-           _initCounter++;
+           return false;
+         };
 
-           if (ui.hash.startWalkthrough) {
-             ui.hash.startWalkthrough = false;
-             context.container().call(uiIntro(context));
-           }
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           if (disable) return _t('operations.split.' + disable);
+           return _t('operations.split.description.' + _geometry + '.' + _waysAmount + '.' + _nodesAmount + '_node');
+         };
 
-           function pan(d) {
-             return function (d3_event) {
-               if (d3_event.shiftKey) return;
-               if (context.container().select('.combobox').size()) return;
-               d3_event.preventDefault();
-               context.map().pan(d, 100);
-             };
+         operation.annotation = function () {
+           return _t('operations.split.annotation.' + _geometry, {
+             n: _ways.length
+           });
+         };
+
+         operation.icon = function () {
+           if (_waysAmount === 'multiple') {
+             return '#iD-operation-split-multiple';
+           } else {
+             return '#iD-operation-split';
            }
-         }
+         };
 
-         var ui = {};
+         operation.id = 'split';
+         operation.keys = [_t('operations.split.key')];
+         operation.title = _t('operations.split.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
+       }
 
-         var _loadPromise; // renders the iD interface into the container node
+       function operationStraighten(context, selectedIDs) {
+         var _wayIDs = selectedIDs.filter(function (id) {
+           return id.charAt(0) === 'w';
+         });
 
+         var _nodeIDs = selectedIDs.filter(function (id) {
+           return id.charAt(0) === 'n';
+         });
 
-         ui.ensureLoaded = function () {
-           if (_loadPromise) return _loadPromise;
-           return _loadPromise = Promise.all([// must have strings and presets before loading the UI
-           _mainLocalizer.ensureLoaded(), _mainPresetIndex.ensureLoaded()]).then(function () {
-             if (!context.container().empty()) render(context.container());
-           })["catch"](function (err) {
-             return console.error(err);
-           }); // eslint-disable-line
-         }; // `ui.restart()` will destroy and rebuild the entire iD interface,
-         // for example to switch the locale while iD is running.
+         var _amount = (_wayIDs.length ? _wayIDs : _nodeIDs).length === 1 ? 'single' : 'multiple';
 
+         var _nodes = utilGetAllNodes(selectedIDs, context.graph());
 
-         ui.restart = function () {
-           context.keybinding().clear();
-           _loadPromise = null;
-           context.container().selectAll('*').remove();
-           ui.ensureLoaded();
-         };
+         var _coords = _nodes.map(function (n) {
+           return n.loc;
+         });
 
-         ui.lastPointerType = function () {
-           return _lastPointerType;
-         };
+         var _extent = utilTotalExtent(selectedIDs, context.graph());
 
-         ui.svgDefs = svgDefs(context);
-         ui.flash = uiFlash(context);
-         ui.sidebar = uiSidebar(context);
-         ui.photoviewer = uiPhotoviewer(context);
-         ui.shortcuts = uiShortcuts(context);
+         var _action = chooseAction();
 
-         ui.onResize = function (withPan) {
-           var map = context.map(); // Recalc dimensions of map and sidebar.. (`true` = force recalc)
-           // This will call `getBoundingClientRect` and trigger reflow,
-           //  but the values will be cached for later use.
+         var _geometry;
 
-           var mapDimensions = utilGetDimensions(context.container().select('.main-content'), true);
-           utilGetDimensions(context.container().select('.sidebar'), true);
+         function chooseAction() {
+           // straighten selected nodes
+           if (_wayIDs.length === 0 && _nodeIDs.length > 2) {
+             _geometry = 'point';
+             return actionStraightenNodes(_nodeIDs, context.projection); // straighten selected ways (possibly between range of 2 selected nodes)
+           } else if (_wayIDs.length > 0 && (_nodeIDs.length === 0 || _nodeIDs.length === 2)) {
+             var startNodeIDs = [];
+             var endNodeIDs = [];
 
-           if (withPan !== undefined) {
-             map.redrawEnable(false);
-             map.pan(withPan);
-             map.redrawEnable(true);
-           }
+             for (var i = 0; i < selectedIDs.length; i++) {
+               var entity = context.entity(selectedIDs[i]);
 
-           map.dimensions(mapDimensions);
-           ui.photoviewer.onMapResize(); // check if header or footer have overflowed
+               if (entity.type === 'node') {
+                 continue;
+               } else if (entity.type !== 'way' || entity.isClosed()) {
+                 return null; // exit early, can't straighten these
+               }
 
-           ui.checkOverflow('.top-toolbar');
-           ui.checkOverflow('.map-footer-bar'); // Use outdated code so it works on Explorer
+               startNodeIDs.push(entity.first());
+               endNodeIDs.push(entity.last());
+             } // Remove duplicate end/startNodeIDs (duplicate nodes cannot be at the line end)
 
-           var resizeWindowEvent = document.createEvent('Event');
-           resizeWindowEvent.initEvent('resizeWindow', true, true);
-           document.dispatchEvent(resizeWindowEvent);
-         }; // Call checkOverflow when resizing or whenever the contents change.
 
+             startNodeIDs = startNodeIDs.filter(function (n) {
+               return startNodeIDs.indexOf(n) === startNodeIDs.lastIndexOf(n);
+             });
+             endNodeIDs = endNodeIDs.filter(function (n) {
+               return endNodeIDs.indexOf(n) === endNodeIDs.lastIndexOf(n);
+             }); // Ensure all ways are connected (i.e. only 2 unique endpoints/startpoints)
 
-         ui.checkOverflow = function (selector, reset) {
-           if (reset) {
-             delete _needWidth[selector];
-           }
+             if (utilArrayDifference(startNodeIDs, endNodeIDs).length + utilArrayDifference(endNodeIDs, startNodeIDs).length !== 2) return null; // Ensure path contains at least 3 unique nodes
 
-           var selection = context.container().select(selector);
-           if (selection.empty()) return;
-           var scrollWidth = selection.property('scrollWidth');
-           var clientWidth = selection.property('clientWidth');
-           var needed = _needWidth[selector] || scrollWidth;
+             var wayNodeIDs = utilGetAllNodes(_wayIDs, context.graph()).map(function (node) {
+               return node.id;
+             });
+             if (wayNodeIDs.length <= 2) return null; // If range of 2 selected nodes is supplied, ensure nodes lie on the selected path
 
-           if (scrollWidth > clientWidth) {
-             // overflow happening
-             selection.classed('narrow', true);
+             if (_nodeIDs.length === 2 && (wayNodeIDs.indexOf(_nodeIDs[0]) === -1 || wayNodeIDs.indexOf(_nodeIDs[1]) === -1)) return null;
 
-             if (!_needWidth[selector]) {
-               _needWidth[selector] = scrollWidth;
+             if (_nodeIDs.length) {
+               // If we're only straightenting between two points, we only need that extent visible
+               _extent = utilTotalExtent(_nodeIDs, context.graph());
              }
-           } else if (scrollWidth >= needed) {
-             selection.classed('narrow', false);
-           }
-         };
-
-         ui.togglePanes = function (showPane) {
-           var hidePanes = context.container().selectAll('.map-pane.shown');
-           var side = _mainLocalizer.textDirection() === 'ltr' ? 'right' : 'left';
-           hidePanes.classed('shown', false).classed('hide', true);
-           context.container().selectAll('.map-pane-control button').classed('active', false);
-
-           if (showPane) {
-             hidePanes.classed('shown', false).classed('hide', true).style(side, '-500px');
-             context.container().selectAll('.' + showPane.attr('pane') + '-control button').classed('active', true);
-             showPane.classed('shown', true).classed('hide', false);
 
-             if (hidePanes.empty()) {
-               showPane.style(side, '-500px').transition().duration(200).style(side, '0px');
-             } else {
-               showPane.style(side, '0px');
-             }
-           } else {
-             hidePanes.classed('shown', true).classed('hide', false).style(side, '0px').transition().duration(200).style(side, '-500px').on('end', function () {
-               select(this).classed('shown', false).classed('hide', true);
-             });
+             _geometry = 'line';
+             return actionStraightenWay(selectedIDs, context.projection);
            }
-         };
 
-         var _editMenu = uiEditMenu(context);
+           return null;
+         }
 
-         ui.editMenu = function () {
-           return _editMenu;
-         };
+         function operation() {
+           if (!_action) return;
+           context.perform(_action, operation.annotation());
+           window.setTimeout(function () {
+             context.validator().validate();
+           }, 300); // after any transition
+         }
 
-         ui.showEditMenu = function (anchorPoint, triggerType, operations) {
-           // remove any displayed menu
-           ui.closeEditMenu();
-           if (!operations && context.mode().operations) operations = context.mode().operations();
-           if (!operations || !operations.length) return; // disable menu if in wide selection, for example
+         operation.available = function () {
+           return Boolean(_action);
+         };
 
-           if (!context.map().editableDataEnabled()) return;
-           var surfaceNode = context.surface().node();
+         operation.disabled = function () {
+           var reason = _action.disabled(context.graph());
 
-           if (surfaceNode.focus) {
-             // FF doesn't support it
-             // focus the surface or else clicking off the menu may not trigger modeBrowse
-             surfaceNode.focus();
+           if (reason) {
+             return reason;
+           } else if (_extent.percentContainedIn(context.map().extent()) < 0.8) {
+             return 'too_large';
+           } else if (someMissing()) {
+             return 'not_downloaded';
+           } else if (selectedIDs.some(context.hasHiddenConnections)) {
+             return 'connected_to_hidden';
            }
 
-           operations.forEach(function (operation) {
-             if (operation.point) operation.point(anchorPoint);
-           });
+           return false;
 
-           _editMenu.anchorLoc(anchorPoint).triggerType(triggerType).operations(operations); // render the menu
+           function someMissing() {
+             if (context.inIntro()) return false;
+             var osm = context.connection();
 
+             if (osm) {
+               var missing = _coords.filter(function (loc) {
+                 return !osm.isDataLoaded(loc);
+               });
 
-           context.map().supersurface.call(_editMenu);
-         };
+               if (missing.length) {
+                 missing.forEach(function (loc) {
+                   context.loadTileAtLoc(loc);
+                 });
+                 return true;
+               }
+             }
 
-         ui.closeEditMenu = function () {
-           // remove any existing menu no matter how it was added
-           context.map().supersurface.select('.edit-menu').remove();
+             return false;
+           }
          };
 
-         var _saveLoading = select(null);
+         operation.tooltip = function () {
+           var disable = operation.disabled();
+           return disable ? _t('operations.straighten.' + disable + '.' + _amount) : _t('operations.straighten.description.' + _geometry + (_wayIDs.length === 1 ? '' : 's'));
+         };
 
-         context.uploader().on('saveStarted.ui', function () {
-           _saveLoading = uiLoading(context).message(_t.html('save.uploading')).blocking(true);
-           context.container().call(_saveLoading); // block input during upload
-         }).on('saveEnded.ui', function () {
-           _saveLoading.close();
+         operation.annotation = function () {
+           return _t('operations.straighten.annotation.' + _geometry, {
+             n: _wayIDs.length ? _wayIDs.length : _nodeIDs.length
+           });
+         };
 
-           _saveLoading = select(null);
-         });
-         return ui;
+         operation.id = 'straighten';
+         operation.keys = [_t('operations.straighten.key')];
+         operation.title = _t('operations.straighten.title');
+         operation.behavior = behaviorOperation(context).which(operation);
+         return operation;
        }
 
-       function coreContext() {
-         var _this = this;
-
-         var dispatch$1 = dispatch('enter', 'exit', 'change');
-         var context = utilRebind({}, dispatch$1, 'on');
-
-         var _deferred = new Set();
+       var Operations = /*#__PURE__*/Object.freeze({
+               __proto__: null,
+               operationCircularize: operationCircularize,
+               operationContinue: operationContinue,
+               operationCopy: operationCopy,
+               operationDelete: operationDelete,
+               operationDisconnect: operationDisconnect,
+               operationDowngrade: operationDowngrade,
+               operationExtract: operationExtract,
+               operationMerge: operationMerge,
+               operationMove: operationMove,
+               operationOrthogonalize: operationOrthogonalize,
+               operationPaste: operationPaste,
+               operationReflectShort: operationReflectShort,
+               operationReflectLong: operationReflectLong,
+               operationReverse: operationReverse,
+               operationRotate: operationRotate,
+               operationSplit: operationSplit,
+               operationStraighten: operationStraighten
+       });
 
-         context.version = '2.19.4';
-         context.privacyVersion = '20200407'; // iD will alter the hash so cache the parameters intended to setup the session
+       function modeSelect(context, selectedIDs) {
+         var mode = {
+           id: 'select',
+           button: 'browse'
+         };
+         var keybinding = utilKeybinding('select');
 
-         context.initialHashParams = window.location.hash ? utilStringQs(window.location.hash) : {};
-         context.isFirstSession = !corePreferences('sawSplash') && !corePreferences('sawPrivacyVersion');
-         /* Changeset */
-         // An osmChangeset object. Not loaded until needed.
+         var _breatheBehavior = behaviorBreathe();
 
-         context.changeset = null;
-         var _defaultChangesetComment = context.initialHashParams.comment;
-         var _defaultChangesetSource = context.initialHashParams.source;
-         var _defaultChangesetHashtags = context.initialHashParams.hashtags;
+         var _modeDragNode = modeDragNode(context);
 
-         context.defaultChangesetComment = function (val) {
-           if (!arguments.length) return _defaultChangesetComment;
-           _defaultChangesetComment = val;
-           return context;
-         };
+         var _selectBehavior;
 
-         context.defaultChangesetSource = function (val) {
-           if (!arguments.length) return _defaultChangesetSource;
-           _defaultChangesetSource = val;
-           return context;
-         };
+         var _behaviors = [];
+         var _operations = [];
+         var _newFeature = false;
+         var _follow = false; // `_focusedParentWayId` is used when we visit a vertex with multiple
+         // parents, and we want to remember which parent line we started on.
 
-         context.defaultChangesetHashtags = function (val) {
-           if (!arguments.length) return _defaultChangesetHashtags;
-           _defaultChangesetHashtags = val;
-           return context;
-         };
-         /* Document title */
+         var _focusedParentWayId;
 
-         /* (typically shown as the label for the browser window/tab) */
-         // If true, iD will update the title based on what the user is doing
+         var _focusedVertexIds;
 
+         function singular() {
+           if (selectedIDs && selectedIDs.length === 1) {
+             return context.hasEntity(selectedIDs[0]);
+           }
+         }
 
-         var _setsDocumentTitle = true;
+         function selectedEntities() {
+           return selectedIDs.map(function (id) {
+             return context.hasEntity(id);
+           }).filter(Boolean);
+         }
 
-         context.setsDocumentTitle = function (val) {
-           if (!arguments.length) return _setsDocumentTitle;
-           _setsDocumentTitle = val;
-           return context;
-         }; // The part of the title that is always the same
+         function checkSelectedIDs() {
+           var ids = [];
 
+           if (Array.isArray(selectedIDs)) {
+             ids = selectedIDs.filter(function (id) {
+               return context.hasEntity(id);
+             });
+           }
 
-         var _documentTitleBase = document.title;
+           if (!ids.length) {
+             context.enter(modeBrowse(context));
+             return false;
+           } else if (selectedIDs.length > 1 && ids.length === 1 || selectedIDs.length === 1 && ids.length > 1) {
+             // switch between single- and multi-select UI
+             context.enter(modeSelect(context, ids));
+             return false;
+           }
 
-         context.documentTitleBase = function (val) {
-           if (!arguments.length) return _documentTitleBase;
-           _documentTitleBase = val;
-           return context;
-         };
-         /* User interface and keybinding */
+           selectedIDs = ids;
+           return true;
+         } // find the parent ways for nextVertex, previousVertex, and selectParent
 
 
-         var _ui;
+         function parentWaysIdsOfSelection(onlyCommonParents) {
+           var graph = context.graph();
+           var parents = [];
 
-         context.ui = function () {
-           return _ui;
-         };
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = context.hasEntity(selectedIDs[i]);
 
-         context.lastPointerType = function () {
-           return _ui.lastPointerType();
-         };
+             if (!entity || entity.geometry(graph) !== 'vertex') {
+               return []; // selection includes some non-vertices
+             }
 
-         var _keybinding = utilKeybinding('context');
+             var currParents = graph.parentWays(entity).map(function (w) {
+               return w.id;
+             });
 
-         context.keybinding = function () {
-           return _keybinding;
-         };
+             if (!parents.length) {
+               parents = currParents;
+               continue;
+             }
 
-         select(document).call(_keybinding);
-         /* Straight accessors. Avoid using these if you can. */
-         // Instantiate the connection here because it doesn't require passing in
-         // `context` and it's needed for pre-init calls like `preauth`
+             parents = (onlyCommonParents ? utilArrayIntersection : utilArrayUnion)(parents, currParents);
 
-         var _connection = services.osm;
+             if (!parents.length) {
+               return [];
+             }
+           }
 
-         var _history;
+           return parents;
+         } // find the child nodes for selected ways
 
-         var _validator;
 
-         var _uploader;
+         function childNodeIdsOfSelection(onlyCommon) {
+           var graph = context.graph();
+           var childs = [];
 
-         context.connection = function () {
-           return _connection;
-         };
+           for (var i = 0; i < selectedIDs.length; i++) {
+             var entity = context.hasEntity(selectedIDs[i]);
 
-         context.history = function () {
-           return _history;
-         };
+             if (!entity || !['area', 'line'].includes(entity.geometry(graph))) {
+               return []; // selection includes non-area/non-line
+             }
 
-         context.validator = function () {
-           return _validator;
-         };
+             var currChilds = graph.childNodes(entity).map(function (node) {
+               return node.id;
+             });
 
-         context.uploader = function () {
-           return _uploader;
-         };
-         /* Connection */
+             if (!childs.length) {
+               childs = currChilds;
+               continue;
+             }
 
+             childs = (onlyCommon ? utilArrayIntersection : utilArrayUnion)(childs, currChilds);
 
-         context.preauth = function (options) {
-           if (_connection) {
-             _connection["switch"](options);
+             if (!childs.length) {
+               return [];
+             }
            }
 
-           return context;
-         };
-         /* connection options for source switcher (optional) */
+           return childs;
+         }
 
+         function checkFocusedParent() {
+           if (_focusedParentWayId) {
+             var parents = parentWaysIdsOfSelection(true);
+             if (parents.indexOf(_focusedParentWayId) === -1) _focusedParentWayId = null;
+           }
+         }
 
-         var _apiConnections;
+         function parentWayIdForVertexNavigation() {
+           var parentIds = parentWaysIdsOfSelection(true);
 
-         context.apiConnections = function (val) {
-           if (!arguments.length) return _apiConnections;
-           _apiConnections = val;
-           return context;
-         }; // A string or array or locale codes to prefer over the browser's settings
+           if (_focusedParentWayId && parentIds.indexOf(_focusedParentWayId) !== -1) {
+             // prefer the previously seen parent
+             return _focusedParentWayId;
+           }
 
+           return parentIds.length ? parentIds[0] : null;
+         }
 
-         context.locale = function (locale) {
-           if (!arguments.length) return _mainLocalizer.localeCode();
-           _mainLocalizer.preferredLocaleCodes(locale);
-           return context;
+         mode.selectedIDs = function (val) {
+           if (!arguments.length) return selectedIDs;
+           selectedIDs = val;
+           return mode;
          };
 
-         function afterLoad(cid, callback) {
-           return function (err, result) {
-             if (err) {
-               // 400 Bad Request, 401 Unauthorized, 403 Forbidden..
-               if (err.status === 400 || err.status === 401 || err.status === 403) {
-                 if (_connection) {
-                   _connection.logout();
-                 }
-               }
+         mode.zoomToSelected = function () {
+           context.map().zoomToEase(selectedEntities());
+         };
 
-               if (typeof callback === 'function') {
-                 callback(err);
-               }
+         mode.newFeature = function (val) {
+           if (!arguments.length) return _newFeature;
+           _newFeature = val;
+           return mode;
+         };
 
-               return;
-             } else if (_connection && _connection.getConnectionId() !== cid) {
-               if (typeof callback === 'function') {
-                 callback({
-                   message: 'Connection Switched',
-                   status: -1
-                 });
-               }
+         mode.selectBehavior = function (val) {
+           if (!arguments.length) return _selectBehavior;
+           _selectBehavior = val;
+           return mode;
+         };
 
-               return;
-             } else {
-               _history.merge(result.data, result.extent);
+         mode.follow = function (val) {
+           if (!arguments.length) return _follow;
+           _follow = val;
+           return mode;
+         };
 
-               if (typeof callback === 'function') {
-                 callback(err, result);
-               }
+         function loadOperations() {
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.uninstall(operation.behavior);
+             }
+           });
 
-               return;
+           _operations = Object.values(Operations).map(function (o) {
+             return o(context, selectedIDs);
+           }).filter(function (o) {
+             return o.id !== 'delete' && o.id !== 'downgrade' && o.id !== 'copy';
+           }).concat([// group copy/downgrade/delete operation together at the end of the list
+           operationCopy(context, selectedIDs), operationDowngrade(context, selectedIDs), operationDelete(context, selectedIDs)]).filter(function (operation) {
+             return operation.available();
+           });
+
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.install(operation.behavior);
              }
-           };
+           }); // remove any displayed menu
+
+
+           context.ui().closeEditMenu();
          }
 
-         context.loadTiles = function (projection, callback) {
-           var handle = window.requestIdleCallback(function () {
-             _deferred["delete"](handle);
+         mode.operations = function () {
+           return _operations;
+         };
 
-             if (_connection && context.editableDataEnabled()) {
-               var cid = _connection.getConnectionId();
+         mode.enter = function () {
+           if (!checkSelectedIDs()) return;
+           context.features().forceVisible(selectedIDs);
 
-               _connection.loadTiles(projection, afterLoad(cid, callback));
-             }
-           });
+           _modeDragNode.restoreSelectedIDs(selectedIDs);
 
-           _deferred.add(handle);
-         };
+           loadOperations();
 
-         context.loadTileAtLoc = function (loc, callback) {
-           var handle = window.requestIdleCallback(function () {
-             _deferred["delete"](handle);
+           if (!_behaviors.length) {
+             if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+             _behaviors = [behaviorPaste(context), _breatheBehavior, behaviorHover(context).on('hover', context.ui().sidebar.hoverModeSelect), _selectBehavior, behaviorLasso(context), _modeDragNode.behavior, modeDragNote(context).behavior];
+           }
 
-             if (_connection && context.editableDataEnabled()) {
-               var cid = _connection.getConnectionId();
+           _behaviors.forEach(context.install);
 
-               _connection.loadTileAtLoc(loc, afterLoad(cid, callback));
-             }
+           keybinding.on(_t('inspector.zoom_to.key'), mode.zoomToSelected).on(['[', 'pgup'], previousVertex).on([']', 'pgdown'], nextVertex).on(['{', uiCmd('⌘['), 'home'], firstVertex).on(['}', uiCmd('⌘]'), 'end'], lastVertex).on(uiCmd('⇧←'), nudgeSelection([-10, 0])).on(uiCmd('⇧↑'), nudgeSelection([0, -10])).on(uiCmd('⇧→'), nudgeSelection([10, 0])).on(uiCmd('⇧↓'), nudgeSelection([0, 10])).on(uiCmd('⇧⌥←'), nudgeSelection([-100, 0])).on(uiCmd('⇧⌥↑'), nudgeSelection([0, -100])).on(uiCmd('⇧⌥→'), nudgeSelection([100, 0])).on(uiCmd('⇧⌥↓'), nudgeSelection([0, 100])).on(utilKeybinding.plusKeys.map(function (key) {
+             return uiCmd('⇧' + key);
+           }), scaleSelection(1.05)).on(utilKeybinding.plusKeys.map(function (key) {
+             return uiCmd('⇧⌥' + key);
+           }), scaleSelection(Math.pow(1.05, 5))).on(utilKeybinding.minusKeys.map(function (key) {
+             return uiCmd('⇧' + key);
+           }), scaleSelection(1 / 1.05)).on(utilKeybinding.minusKeys.map(function (key) {
+             return uiCmd('⇧⌥' + key);
+           }), scaleSelection(1 / Math.pow(1.05, 5))).on(['\\', 'pause'], focusNextParent).on(uiCmd('⌘↑'), selectParent).on(uiCmd('⌘↓'), selectChild).on('⎋', esc, true);
+           select(document).call(keybinding);
+           context.ui().sidebar.select(selectedIDs, _newFeature);
+           context.history().on('change.select', function () {
+             loadOperations(); // reselect after change in case relation members were removed or added
+
+             selectElements();
+           }).on('undone.select', checkSelectedIDs).on('redone.select', checkSelectedIDs);
+           context.map().on('drawn.select', selectElements).on('crossEditableZoom.select', function () {
+             selectElements();
+
+             _breatheBehavior.restartIfNeeded(context.surface());
            });
+           context.map().doubleUpHandler().on('doubleUp.modeSelect', didDoubleUp);
+           selectElements();
 
-           _deferred.add(handle);
-         };
+           if (_follow) {
+             var extent = geoExtent();
+             var graph = context.graph();
+             selectedIDs.forEach(function (id) {
+               var entity = context.entity(id);
 
-         context.loadEntity = function (entityID, callback) {
-           if (_connection) {
-             var cid = _connection.getConnectionId();
+               extent._extend(entity.extent(graph));
+             });
+             var loc = extent.center();
+             context.map().centerEase(loc); // we could enter the mode multiple times, so reset follow for next time
 
-             _connection.loadEntity(entityID, afterLoad(cid, callback));
+             _follow = false;
            }
-         };
 
-         context.zoomToEntity = function (entityID, zoomTo) {
-           if (zoomTo !== false) {
-             context.loadEntity(entityID, function (err, result) {
-               if (err) return;
-               var entity = result.data.find(function (e) {
-                 return e.id === entityID;
-               });
+           function nudgeSelection(delta) {
+             return function () {
+               // prevent nudging during low zoom selection
+               if (!context.map().withinEditableZoom()) return;
+               var moveOp = operationMove(context, selectedIDs);
 
-               if (entity) {
-                 _map.zoomTo(entity);
+               if (moveOp.disabled()) {
+                 context.ui().flash.duration(4000).iconName('#iD-operation-' + moveOp.id).iconClass('operation disabled').label(moveOp.tooltip)();
+               } else {
+                 context.perform(actionMove(selectedIDs, delta, context.projection), moveOp.annotation());
+                 context.validator().validate();
                }
-             });
+             };
            }
 
-           _map.on('drawn.zoomToEntity', function () {
-             if (!context.hasEntity(entityID)) return;
-
-             _map.on('drawn.zoomToEntity', null);
-
-             context.on('enter.zoomToEntity', null);
-             context.enter(modeSelect(context, [entityID]));
-           });
+           function scaleSelection(factor) {
+             return function () {
+               // prevent scaling during low zoom selection
+               if (!context.map().withinEditableZoom()) return;
+               var nodes = utilGetAllNodes(selectedIDs, context.graph());
+               var isUp = factor > 1; // can only scale if multiple nodes are selected
 
-           context.on('enter.zoomToEntity', function () {
-             if (_mode.id !== 'browse') {
-               _map.on('drawn.zoomToEntity', null);
+               if (nodes.length <= 1) return;
+               var extent = utilTotalExtent(selectedIDs, context.graph()); // These disabled checks would normally be handled by an operation
+               // object, but we don't want an actual scale operation at this point.
 
-               context.on('enter.zoomToEntity', null);
-             }
-           });
-         };
+               function scalingDisabled() {
+                 if (tooSmall()) {
+                   return 'too_small';
+                 } else if (extent.percentContainedIn(context.map().extent()) < 0.8) {
+                   return 'too_large';
+                 } else if (someMissing() || selectedIDs.some(incompleteRelation)) {
+                   return 'not_downloaded';
+                 } else if (selectedIDs.some(context.hasHiddenConnections)) {
+                   return 'connected_to_hidden';
+                 }
 
-         var _minEditableZoom = 16;
+                 return false;
 
-         context.minEditableZoom = function (val) {
-           if (!arguments.length) return _minEditableZoom;
-           _minEditableZoom = val;
+                 function tooSmall() {
+                   if (isUp) return false;
+                   var dLon = Math.abs(extent[1][0] - extent[0][0]);
+                   var dLat = Math.abs(extent[1][1] - extent[0][1]);
+                   return dLon < geoMetersToLon(1, extent[1][1]) && dLat < geoMetersToLat(1);
+                 }
 
-           if (_connection) {
-             _connection.tileZoom(val);
-           }
+                 function someMissing() {
+                   if (context.inIntro()) return false;
+                   var osm = context.connection();
 
-           return context;
-         }; // String length limits in Unicode characters, not JavaScript UTF-16 code units
+                   if (osm) {
+                     var missing = nodes.filter(function (n) {
+                       return !osm.isDataLoaded(n.loc);
+                     });
 
+                     if (missing.length) {
+                       missing.forEach(function (loc) {
+                         context.loadTileAtLoc(loc);
+                       });
+                       return true;
+                     }
+                   }
 
-         context.maxCharsForTagKey = function () {
-           return 255;
-         };
+                   return false;
+                 }
 
-         context.maxCharsForTagValue = function () {
-           return 255;
-         };
+                 function incompleteRelation(id) {
+                   var entity = context.entity(id);
+                   return entity.type === 'relation' && !entity.isComplete(context.graph());
+                 }
+               }
 
-         context.maxCharsForRelationRole = function () {
-           return 255;
-         };
+               var disabled = scalingDisabled();
 
-         function cleanOsmString(val, maxChars) {
-           // be lenient with input
-           if (val === undefined || val === null) {
-             val = '';
-           } else {
-             val = val.toString();
-           } // remove whitespace
+               if (disabled) {
+                 var multi = selectedIDs.length === 1 ? 'single' : 'multiple';
+                 context.ui().flash.duration(4000).iconName('#iD-icon-no').iconClass('operation disabled').label(_t.html('operations.scale.' + disabled + '.' + multi))();
+               } else {
+                 var pivot = context.projection(extent.center());
+                 var annotation = _t('operations.scale.annotation.' + (isUp ? 'up' : 'down') + '.feature', {
+                   n: selectedIDs.length
+                 });
+                 context.perform(actionScale(selectedIDs, pivot, factor, context.projection), annotation);
+                 context.validator().validate();
+               }
+             };
+           }
 
+           function didDoubleUp(d3_event, loc) {
+             if (!context.map().withinEditableZoom()) return;
+             var target = select(d3_event.target);
+             var datum = target.datum();
+             var entity = datum && datum.properties && datum.properties.entity;
+             if (!entity) return;
 
-           val = val.trim(); // use the canonical form of the string
+             if (entity instanceof osmWay && target.classed('target')) {
+               var choice = geoChooseEdge(context.graph().childNodes(entity), loc, context.projection);
+               var prev = entity.nodes[choice.index - 1];
+               var next = entity.nodes[choice.index];
+               context.perform(actionAddMidpoint({
+                 loc: choice.loc,
+                 edge: [prev, next]
+               }, osmNode()), _t('operations.add.annotation.vertex'));
+               context.validator().validate();
+             } else if (entity.type === 'midpoint') {
+               context.perform(actionAddMidpoint({
+                 loc: entity.loc,
+                 edge: entity.edge
+               }, osmNode()), _t('operations.add.annotation.vertex'));
+               context.validator().validate();
+             }
+           }
 
-           if (val.normalize) val = val.normalize('NFC'); // trim to the number of allowed characters
+           function selectElements() {
+             if (!checkSelectedIDs()) return;
+             var surface = context.surface();
+             surface.selectAll('.selected-member').classed('selected-member', false);
+             surface.selectAll('.selected').classed('selected', false);
+             surface.selectAll('.related').classed('related', false); // reload `_focusedParentWayId` based on the current selection
 
-           return utilUnicodeCharsTruncated(val, maxChars);
-         }
+             checkFocusedParent();
 
-         context.cleanTagKey = function (val) {
-           return cleanOsmString(val, context.maxCharsForTagKey());
-         };
+             if (_focusedParentWayId) {
+               surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+             }
 
-         context.cleanTagValue = function (val) {
-           return cleanOsmString(val, context.maxCharsForTagValue());
-         };
+             if (context.map().withinEditableZoom()) {
+               // Apply selection styling if not in wide selection
+               surface.selectAll(utilDeepMemberSelector(selectedIDs, context.graph(), true
+               /* skipMultipolgonMembers */
+               )).classed('selected-member', true);
+               surface.selectAll(utilEntityOrDeepMemberSelector(selectedIDs, context.graph())).classed('selected', true);
+             }
+           }
 
-         context.cleanRelationRole = function (val) {
-           return cleanOsmString(val, context.maxCharsForRelationRole());
-         };
-         /* History */
+           function esc() {
+             if (context.container().select('.combobox').size()) return;
+             context.enter(modeBrowse(context));
+           }
 
+           function firstVertex(d3_event) {
+             d3_event.preventDefault();
+             var entity = singular();
+             var parentId = parentWayIdForVertexNavigation();
+             var way;
 
-         var _inIntro = false;
+             if (entity && entity.type === 'way') {
+               way = entity;
+             } else if (parentId) {
+               way = context.entity(parentId);
+             }
 
-         context.inIntro = function (val) {
-           if (!arguments.length) return _inIntro;
-           _inIntro = val;
-           return context;
-         }; // Immediately save the user's history to localstorage, if possible
-         // This is called someteimes, but also on the `window.onbeforeunload` handler
+             _focusedParentWayId = way && way.id;
 
+             if (way) {
+               context.enter(mode.selectedIDs([way.first()]).follow(true));
+             }
+           }
 
-         context.save = function () {
-           // no history save, no message onbeforeunload
-           if (_inIntro || context.container().select('.modal').size()) return;
-           var canSave;
+           function lastVertex(d3_event) {
+             d3_event.preventDefault();
+             var entity = singular();
+             var parentId = parentWayIdForVertexNavigation();
+             var way;
 
-           if (_mode && _mode.id === 'save') {
-             canSave = false; // Attempt to prevent user from creating duplicate changes - see #5200
+             if (entity && entity.type === 'way') {
+               way = entity;
+             } else if (parentId) {
+               way = context.entity(parentId);
+             }
 
-             if (services.osm && services.osm.isChangesetInflight()) {
-               _history.clearSaved();
+             _focusedParentWayId = way && way.id;
 
-               return;
+             if (way) {
+               context.enter(mode.selectedIDs([way.last()]).follow(true));
              }
-           } else {
-             canSave = context.selectedIDs().every(function (id) {
-               var entity = context.hasEntity(id);
-               return entity && !entity.isDegenerate();
-             });
            }
 
-           if (canSave) {
-             _history.save();
-           }
+           function previousVertex(d3_event) {
+             d3_event.preventDefault();
+             var parentId = parentWayIdForVertexNavigation();
+             _focusedParentWayId = parentId;
+             if (!parentId) return;
+             var way = context.entity(parentId);
+             var length = way.nodes.length;
+             var curr = way.nodes.indexOf(selectedIDs[0]);
+             var index = -1;
 
-           if (_history.hasChanges()) {
-             return _t('save.unsaved_changes');
-           }
-         }; // Debounce save, since it's a synchronous localStorage write,
-         // and history changes can happen frequently (e.g. when dragging).
+             if (curr > 0) {
+               index = curr - 1;
+             } else if (way.isClosed()) {
+               index = length - 2;
+             }
 
+             if (index !== -1) {
+               context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+             }
+           }
 
-         context.debouncedSave = debounce(context.save, 350);
+           function nextVertex(d3_event) {
+             d3_event.preventDefault();
+             var parentId = parentWayIdForVertexNavigation();
+             _focusedParentWayId = parentId;
+             if (!parentId) return;
+             var way = context.entity(parentId);
+             var length = way.nodes.length;
+             var curr = way.nodes.indexOf(selectedIDs[0]);
+             var index = -1;
 
-         function withDebouncedSave(fn) {
-           return function () {
-             var result = fn.apply(_history, arguments);
-             context.debouncedSave();
-             return result;
-           };
-         }
-         /* Graph */
+             if (curr < length - 1) {
+               index = curr + 1;
+             } else if (way.isClosed()) {
+               index = 0;
+             }
 
+             if (index !== -1) {
+               context.enter(mode.selectedIDs([way.nodes[index]]).follow(true));
+             }
+           }
 
-         context.hasEntity = function (id) {
-           return _history.graph().hasEntity(id);
-         };
+           function focusNextParent(d3_event) {
+             d3_event.preventDefault();
+             var parents = parentWaysIdsOfSelection(true);
+             if (!parents || parents.length < 2) return;
+             var index = parents.indexOf(_focusedParentWayId);
 
-         context.entity = function (id) {
-           return _history.graph().entity(id);
-         };
-         /* Modes */
+             if (index < 0 || index > parents.length - 2) {
+               _focusedParentWayId = parents[0];
+             } else {
+               _focusedParentWayId = parents[index + 1];
+             }
 
+             var surface = context.surface();
+             surface.selectAll('.related').classed('related', false);
 
-         var _mode;
+             if (_focusedParentWayId) {
+               surface.selectAll(utilEntitySelector([_focusedParentWayId])).classed('related', true);
+             }
+           }
 
-         context.mode = function () {
-           return _mode;
-         };
+           function selectParent(d3_event) {
+             d3_event.preventDefault();
+             var currentSelectedIds = mode.selectedIDs();
+             var parentIds = _focusedParentWayId ? [_focusedParentWayId] : parentWaysIdsOfSelection(false);
+             if (!parentIds.length) return;
+             context.enter(mode.selectedIDs(parentIds)); // set this after re-entering the selection since we normally want it cleared on exit
 
-         context.enter = function (newMode) {
-           if (_mode) {
-             _mode.exit();
+             _focusedVertexIds = currentSelectedIds;
+           }
 
-             dispatch$1.call('exit', _this, _mode);
+           function selectChild(d3_event) {
+             d3_event.preventDefault();
+             var currentSelectedIds = mode.selectedIDs();
+             var childIds = _focusedVertexIds ? _focusedVertexIds.filter(function (id) {
+               return context.hasEntity(id);
+             }) : childNodeIdsOfSelection(true);
+             if (!childIds || !childIds.length) return;
+             if (currentSelectedIds.length === 1) _focusedParentWayId = currentSelectedIds[0];
+             context.enter(mode.selectedIDs(childIds));
            }
+         };
 
-           _mode = newMode;
+         mode.exit = function () {
+           // we could enter the mode multiple times but it's only new the first time
+           _newFeature = false;
+           _focusedVertexIds = null;
 
-           _mode.enter();
+           _operations.forEach(function (operation) {
+             if (operation.behavior) {
+               context.uninstall(operation.behavior);
+             }
+           });
 
-           dispatch$1.call('enter', _this, _mode);
-         };
+           _operations = [];
 
-         context.selectedIDs = function () {
-           return _mode && _mode.selectedIDs && _mode.selectedIDs() || [];
-         };
+           _behaviors.forEach(context.uninstall);
 
-         context.activeID = function () {
-           return _mode && _mode.activeID && _mode.activeID();
-         };
+           select(document).call(keybinding.unbind);
+           context.ui().closeEditMenu();
+           context.history().on('change.select', null).on('undone.select', null).on('redone.select', null);
+           var surface = context.surface();
+           surface.selectAll('.selected-member').classed('selected-member', false);
+           surface.selectAll('.selected').classed('selected', false);
+           surface.selectAll('.highlighted').classed('highlighted', false);
+           surface.selectAll('.related').classed('related', false);
+           context.map().on('drawn.select', null);
+           context.ui().sidebar.hide();
+           context.features().forceVisible([]);
+           var entity = singular();
 
-         var _selectedNoteID;
+           if (_newFeature && entity && entity.type === 'relation' && // no tags
+           Object.keys(entity.tags).length === 0 && // no parent relations
+           context.graph().parentRelations(entity).length === 0 && ( // no members or one member with no role
+           entity.members.length === 0 || entity.members.length === 1 && !entity.members[0].role)) {
+             // the user added this relation but didn't edit it at all, so just delete it
+             var deleteAction = actionDeleteRelation(entity.id, true
+             /* don't delete untagged members */
+             );
+             context.perform(deleteAction, _t('operations.delete.annotation.relation'));
+             context.validator().validate();
+           }
+         };
 
-         context.selectedNoteID = function (noteID) {
-           if (!arguments.length) return _selectedNoteID;
-           _selectedNoteID = noteID;
-           return context;
-         }; // NOTE: Don't change the name of this until UI v3 is merged
+         return mode;
+       }
 
+       function behaviorLasso(context) {
+         // use pointer events on supported platforms; fallback to mouse events
+         var _pointerPrefix = 'PointerEvent' in window ? 'pointer' : 'mouse';
 
-         var _selectedErrorID;
+         var behavior = function behavior(selection) {
+           var lasso;
 
-         context.selectedErrorID = function (errorID) {
-           if (!arguments.length) return _selectedErrorID;
-           _selectedErrorID = errorID;
-           return context;
-         };
-         /* Behaviors */
+           function pointerdown(d3_event) {
+             var button = 0; // left
 
+             if (d3_event.button === button && d3_event.shiftKey === true) {
+               lasso = null;
+               select(window).on(_pointerPrefix + 'move.lasso', pointermove).on(_pointerPrefix + 'up.lasso', pointerup);
+               d3_event.stopPropagation();
+             }
+           }
 
-         context.install = function (behavior) {
-           return context.surface().call(behavior);
-         };
+           function pointermove() {
+             if (!lasso) {
+               lasso = uiLasso(context);
+               context.surface().call(lasso);
+             }
 
-         context.uninstall = function (behavior) {
-           return context.surface().call(behavior.off);
-         };
-         /* Copy/Paste */
+             lasso.p(context.map().mouse());
+           }
 
+           function normalize(a, b) {
+             return [[Math.min(a[0], b[0]), Math.min(a[1], b[1])], [Math.max(a[0], b[0]), Math.max(a[1], b[1])]];
+           }
 
-         var _copyGraph;
+           function lassoed() {
+             if (!lasso) return [];
+             var graph = context.graph();
+             var limitToNodes;
 
-         context.copyGraph = function () {
-           return _copyGraph;
-         };
+             if (context.map().editableDataEnabled(true
+             /* skipZoomCheck */
+             ) && context.map().isInWideSelection()) {
+               // only select from the visible nodes
+               limitToNodes = new Set(utilGetAllNodes(context.selectedIDs(), graph));
+             } else if (!context.map().editableDataEnabled()) {
+               return [];
+             }
 
-         var _copyIDs = [];
+             var bounds = lasso.extent().map(context.projection.invert);
+             var extent = geoExtent(normalize(bounds[0], bounds[1]));
+             var intersects = context.history().intersects(extent).filter(function (entity) {
+               return entity.type === 'node' && (!limitToNodes || limitToNodes.has(entity)) && geoPointInPolygon(context.projection(entity.loc), lasso.coordinates) && !context.features().isHidden(entity, graph, entity.geometry(graph));
+             }); // sort the lassoed nodes as best we can
 
-         context.copyIDs = function (val) {
-           if (!arguments.length) return _copyIDs;
-           _copyIDs = val;
-           _copyGraph = _history.graph();
-           return context;
-         };
+             intersects.sort(function (node1, node2) {
+               var parents1 = graph.parentWays(node1);
+               var parents2 = graph.parentWays(node2);
 
-         var _copyLonLat;
+               if (parents1.length && parents2.length) {
+                 // both nodes are vertices
+                 var sharedParents = utilArrayIntersection(parents1, parents2);
 
-         context.copyLonLat = function (val) {
-           if (!arguments.length) return _copyLonLat;
-           _copyLonLat = val;
-           return context;
-         };
-         /* Background */
+                 if (sharedParents.length) {
+                   var sharedParentNodes = sharedParents[0].nodes; // vertices are members of the same way; sort them in their listed order
 
+                   return sharedParentNodes.indexOf(node1.id) - sharedParentNodes.indexOf(node2.id);
+                 } else {
+                   // vertices do not share a way; group them by their respective parent ways
+                   return parseFloat(parents1[0].id.slice(1)) - parseFloat(parents2[0].id.slice(1));
+                 }
+               } else if (parents1.length || parents2.length) {
+                 // only one node is a vertex; sort standalone points before vertices
+                 return parents1.length - parents2.length;
+               } // both nodes are standalone points; sort left to right
 
-         var _background;
 
-         context.background = function () {
-           return _background;
-         };
-         /* Features */
+               return node1.loc[0] - node2.loc[0];
+             });
+             return intersects.map(function (entity) {
+               return entity.id;
+             });
+           }
 
+           function pointerup() {
+             select(window).on(_pointerPrefix + 'move.lasso', null).on(_pointerPrefix + 'up.lasso', null);
+             if (!lasso) return;
+             var ids = lassoed();
+             lasso.close();
 
-         var _features;
+             if (ids.length) {
+               context.enter(modeSelect(context, ids));
+             }
+           }
 
-         context.features = function () {
-           return _features;
+           selection.on(_pointerPrefix + 'down.lasso', pointerdown);
          };
 
-         context.hasHiddenConnections = function (id) {
-           var graph = _history.graph();
-
-           var entity = graph.entity(id);
-           return _features.hasHiddenConnections(entity, graph);
+         behavior.off = function (selection) {
+           selection.on(_pointerPrefix + 'down.lasso', null);
          };
-         /* Photos */
-
 
-         var _photos;
+         return behavior;
+       }
 
-         context.photos = function () {
-           return _photos;
+       function modeBrowse(context) {
+         var mode = {
+           button: 'browse',
+           id: 'browse',
+           title: _t('modes.browse.title'),
+           description: _t('modes.browse.description')
          };
-         /* Map */
+         var sidebar;
 
+         var _selectBehavior;
 
-         var _map;
+         var _behaviors = [];
 
-         context.map = function () {
-           return _map;
+         mode.selectBehavior = function (val) {
+           if (!arguments.length) return _selectBehavior;
+           _selectBehavior = val;
+           return mode;
          };
 
-         context.layers = function () {
-           return _map.layers();
-         };
+         mode.enter = function () {
+           if (!_behaviors.length) {
+             if (!_selectBehavior) _selectBehavior = behaviorSelect(context);
+             _behaviors = [behaviorPaste(context), behaviorHover(context).on('hover', context.ui().sidebar.hover), _selectBehavior, behaviorLasso(context), modeDragNode(context).behavior, modeDragNote(context).behavior];
+           }
 
-         context.surface = function () {
-           return _map.surface;
-         };
+           _behaviors.forEach(context.install); // Get focus on the body.
 
-         context.editableDataEnabled = function () {
-           return _map.editableDataEnabled();
-         };
 
-         context.surfaceRect = function () {
-           return _map.surface.node().getBoundingClientRect();
-         };
+           if (document.activeElement && document.activeElement.blur) {
+             document.activeElement.blur();
+           }
 
-         context.editable = function () {
-           // don't allow editing during save
-           var mode = context.mode();
-           if (!mode || mode.id === 'save') return false;
-           return _map.editableDataEnabled();
+           if (sidebar) {
+             context.ui().sidebar.show(sidebar);
+           } else {
+             context.ui().sidebar.select(null);
+           }
          };
-         /* Debug */
 
+         mode.exit = function () {
+           context.ui().sidebar.hover.cancel();
 
-         var _debugFlags = {
-           tile: false,
-           // tile boundaries
-           collision: false,
-           // label collision bounding boxes
-           imagery: false,
-           // imagery bounding polygons
-           target: false,
-           // touch targets
-           downloaded: false // downloaded data from osm
-
-         };
+           _behaviors.forEach(context.uninstall);
 
-         context.debugFlags = function () {
-           return _debugFlags;
+           if (sidebar) {
+             context.ui().sidebar.hide();
+           }
          };
 
-         context.getDebug = function (flag) {
-           return flag && _debugFlags[flag];
+         mode.sidebar = function (_) {
+           if (!arguments.length) return sidebar;
+           sidebar = _;
+           return mode;
          };
 
-         context.setDebug = function (flag, val) {
-           if (arguments.length === 1) val = true;
-           _debugFlags[flag] = val;
-           dispatch$1.call('change');
-           return context;
+         mode.operations = function () {
+           return [operationPaste(context)];
          };
-         /* Container */
-
-
-         var _container = select(null);
 
-         context.container = function (val) {
-           if (!arguments.length) return _container;
-           _container = val;
+         return mode;
+       }
 
-           _container.classed('ideditor', true);
+       function behaviorAddWay(context) {
+         var dispatch = dispatch$8('start', 'startFromWay', 'startFromNode');
+         var draw = behaviorDraw(context);
 
-           return context;
-         };
+         function behavior(surface) {
+           draw.on('click', function () {
+             dispatch.apply('start', this, arguments);
+           }).on('clickWay', function () {
+             dispatch.apply('startFromWay', this, arguments);
+           }).on('clickNode', function () {
+             dispatch.apply('startFromNode', this, arguments);
+           }).on('cancel', behavior.cancel).on('finish', behavior.cancel);
+           context.map().dblclickZoomEnable(false);
+           surface.call(draw);
+         }
 
-         context.containerNode = function (val) {
-           if (!arguments.length) return context.container().node();
-           context.container(select(val));
-           return context;
+         behavior.off = function (surface) {
+           surface.call(draw.off);
          };
 
-         var _embed;
-
-         context.embed = function (val) {
-           if (!arguments.length) return _embed;
-           _embed = val;
-           return context;
+         behavior.cancel = function () {
+           window.setTimeout(function () {
+             context.map().dblclickZoomEnable(true);
+           }, 1000);
+           context.enter(modeBrowse(context));
          };
-         /* Assets */
 
+         return utilRebind(behavior, dispatch, 'on');
+       }
 
-         var _assetPath = '';
+       function behaviorHash(context) {
+         // cached window.location.hash
+         var _cachedHash = null; // allowable latitude range
 
-         context.assetPath = function (val) {
-           if (!arguments.length) return _assetPath;
-           _assetPath = val;
-           _mainFileFetcher.assetPath(val);
-           return context;
-         };
+         var _latitudeLimit = 90 - 1e-8;
 
-         var _assetMap = {};
+         function computedHashParameters() {
+           var map = context.map();
+           var center = map.center();
+           var zoom = map.zoom();
+           var precision = Math.max(0, Math.ceil(Math.log(zoom) / Math.LN2));
+           var oldParams = utilObjectOmit(utilStringQs(window.location.hash), ['comment', 'source', 'hashtags', 'walkthrough']);
+           var newParams = {};
+           delete oldParams.id;
+           var selected = context.selectedIDs().filter(function (id) {
+             return context.hasEntity(id);
+           });
 
-         context.assetMap = function (val) {
-           if (!arguments.length) return _assetMap;
-           _assetMap = val;
-           _mainFileFetcher.assetMap(val);
-           return context;
-         };
+           if (selected.length) {
+             newParams.id = selected.join(',');
+           }
 
-         context.asset = function (val) {
-           if (/^http(s)?:\/\//i.test(val)) return val;
-           var filename = _assetPath + val;
-           return _assetMap[filename] || filename;
-         };
+           newParams.map = zoom.toFixed(2) + '/' + center[1].toFixed(precision) + '/' + center[0].toFixed(precision);
+           return Object.assign(oldParams, newParams);
+         }
 
-         context.imagePath = function (val) {
-           return context.asset("img/".concat(val));
-         };
-         /* reset (aka flush) */
+         function computedHash() {
+           return '#' + utilQsString(computedHashParameters(), true);
+         }
 
+         function computedTitle(includeChangeCount) {
+           var baseTitle = context.documentTitleBase() || 'iD';
+           var contextual;
+           var changeCount;
+           var titleID;
+           var selected = context.selectedIDs().filter(function (id) {
+             return context.hasEntity(id);
+           });
 
-         context.reset = context.flush = function () {
-           context.debouncedSave.cancel();
-           Array.from(_deferred).forEach(function (handle) {
-             window.cancelIdleCallback(handle);
+           if (selected.length) {
+             var firstLabel = utilDisplayLabel(context.entity(selected[0]), context.graph());
 
-             _deferred["delete"](handle);
-           });
-           Object.values(services).forEach(function (service) {
-             if (service && typeof service.reset === 'function') {
-               service.reset(context);
+             if (selected.length > 1) {
+               contextual = _t('title.labeled_and_more', {
+                 labeled: firstLabel,
+                 count: selected.length - 1
+               });
+             } else {
+               contextual = firstLabel;
              }
-           });
-           context.changeset = null;
 
-           _validator.reset();
+             titleID = 'context';
+           }
 
-           _features.reset();
+           if (includeChangeCount) {
+             changeCount = context.history().difference().summary().length;
 
-           _history.reset();
+             if (changeCount > 0) {
+               titleID = contextual ? 'changes_context' : 'changes';
+             }
+           }
 
-           _uploader.reset(); // don't leave stale state in the inspector
+           if (titleID) {
+             return _t('title.format.' + titleID, {
+               changes: changeCount,
+               base: baseTitle,
+               context: contextual
+             });
+           }
 
+           return baseTitle;
+         }
 
-           context.container().select('.inspector-wrap *').remove();
-           return context;
-         };
-         /* Projections */
+         function updateTitle(includeChangeCount) {
+           if (!context.setsDocumentTitle()) return;
+           var newTitle = computedTitle(includeChangeCount);
 
+           if (document.title !== newTitle) {
+             document.title = newTitle;
+           }
+         }
 
-         context.projection = geoRawMercator();
-         context.curtainProjection = geoRawMercator();
-         /* Init */
+         function updateHashIfNeeded() {
+           if (context.inIntro()) return;
+           var latestHash = computedHash();
 
-         context.init = function () {
-           instantiateInternal();
-           initializeDependents();
-           return context; // Load variables and properties. No property of `context` should be accessed
-           // until this is complete since load statuses are indeterminate. The order
-           // of instantiation shouldn't matter.
+           if (_cachedHash !== latestHash) {
+             _cachedHash = latestHash; // Update the URL hash without affecting the browser navigation stack,
+             // though unavoidably creating a browser history entry
 
-           function instantiateInternal() {
-             _history = coreHistory(context);
-             context.graph = _history.graph;
-             context.pauseChangeDispatch = _history.pauseChangeDispatch;
-             context.resumeChangeDispatch = _history.resumeChangeDispatch;
-             context.perform = withDebouncedSave(_history.perform);
-             context.replace = withDebouncedSave(_history.replace);
-             context.pop = withDebouncedSave(_history.pop);
-             context.overwrite = withDebouncedSave(_history.overwrite);
-             context.undo = withDebouncedSave(_history.undo);
-             context.redo = withDebouncedSave(_history.redo);
-             _validator = coreValidator(context);
-             _uploader = coreUploader(context);
-             _background = rendererBackground(context);
-             _features = rendererFeatures(context);
-             _map = rendererMap(context);
-             _photos = rendererPhotos(context);
-             _ui = uiInit(context);
-           } // Set up objects that might need to access properties of `context`. The order
-           // might matter if dependents make calls to each other. Be wary of async calls.
+             window.history.replaceState(null, computedTitle(false
+             /* includeChangeCount */
+             ), latestHash); // set the title we want displayed for the browser tab/window
 
+             updateTitle(true
+             /* includeChangeCount */
+             );
+           }
+         }
 
-           function initializeDependents() {
-             if (context.initialHashParams.presets) {
-               _mainPresetIndex.addablePresetIDs(new Set(context.initialHashParams.presets.split(',')));
-             }
+         var _throttledUpdate = throttle(updateHashIfNeeded, 500);
 
-             if (context.initialHashParams.locale) {
-               _mainLocalizer.preferredLocaleCodes(context.initialHashParams.locale);
-             } // kick off some async work
+         var _throttledUpdateTitle = throttle(function () {
+           updateTitle(true
+           /* includeChangeCount */
+           );
+         }, 500);
 
+         function hashchange() {
+           // ignore spurious hashchange events
+           if (window.location.hash === _cachedHash) return;
+           _cachedHash = window.location.hash;
+           var q = utilStringQs(_cachedHash);
+           var mapArgs = (q.map || '').split('/').map(Number);
 
-             _mainLocalizer.ensureLoaded();
+           if (mapArgs.length < 3 || mapArgs.some(isNaN)) {
+             // replace bogus hash
+             updateHashIfNeeded();
+           } else {
+             // don't update if the new hash already reflects the state of iD
+             if (_cachedHash === computedHash()) return;
+             var mode = context.mode();
+             context.map().centerZoom([mapArgs[2], Math.min(_latitudeLimit, Math.max(-_latitudeLimit, mapArgs[1]))], mapArgs[0]);
 
-             _background.ensureLoaded();
+             if (q.id && mode) {
+               var ids = q.id.split(',').filter(function (id) {
+                 return context.hasEntity(id);
+               });
 
-             _mainPresetIndex.ensureLoaded();
-             Object.values(services).forEach(function (service) {
-               if (service && typeof service.init === 'function') {
-                 service.init();
+               if (ids.length && (mode.id === 'browse' || mode.id === 'select' && !utilArrayIdentical(mode.selectedIDs(), ids))) {
+                 context.enter(modeSelect(context, ids));
+                 return;
                }
-             });
+             }
 
-             _map.init();
+             var center = context.map().center();
+             var dist = geoSphericalDistance(center, [mapArgs[2], mapArgs[1]]);
+             var maxdist = 500; // Don't allow the hash location to change too much while drawing
+             // This can happen if the user accidentally hit the back button.  #3996
 
-             _validator.init();
+             if (mode && mode.id.match(/^draw/) !== null && dist > maxdist) {
+               context.enter(modeBrowse(context));
+               return;
+             }
+           }
+         }
 
-             _features.init();
+         function behavior() {
+           context.map().on('move.behaviorHash', _throttledUpdate);
+           context.history().on('change.behaviorHash', _throttledUpdateTitle);
+           context.on('enter.behaviorHash', _throttledUpdate);
+           select(window).on('hashchange.behaviorHash', hashchange);
 
-             if (services.maprules && context.initialHashParams.maprules) {
-               d3_json(context.initialHashParams.maprules).then(function (mapcss) {
-                 services.maprules.init();
-                 mapcss.forEach(function (mapcssSelector) {
-                   return services.maprules.addRule(mapcssSelector);
-                 });
-               })["catch"](function () {
-                 /* ignore */
-               });
-             } // if the container isn't available, e.g. when testing, don't load the UI
+           if (window.location.hash) {
+             var q = utilStringQs(window.location.hash);
+
+             if (q.id) {
+               //if (!context.history().hasRestorableChanges()) {
+               // targeting specific features: download, select, and zoom to them
+               context.zoomToEntity(q.id.split(',')[0], !q.map); //}
+             }
 
+             if (q.walkthrough === 'true') {
+               behavior.startWalkthrough = true;
+             }
 
-             if (!context.container().empty()) {
-               _ui.ensureLoaded().then(function () {
-                 _photos.init();
-               });
+             if (q.map) {
+               behavior.hadHash = true;
              }
+
+             hashchange();
+             updateTitle(false);
            }
+         }
+
+         behavior.off = function () {
+           _throttledUpdate.cancel();
+
+           _throttledUpdateTitle.cancel();
+
+           context.map().on('move.behaviorHash', null);
+           context.on('enter.behaviorHash', null);
+           select(window).on('hashchange.behaviorHash', null);
+           window.location.hash = '';
          };
 
-         return context;
+         return behavior;
        }
 
        // This is only done in testing because of the performance penalty.
 
        var debug = false; // Reexport just what our tests use, see #4379
        var d3 = {
-         dispatch: dispatch,
+         dispatch: dispatch$8,
          geoMercator: mercator,
          geoProjection: projection,
          polygonArea: d3_polygonArea,
                coreLocalizer: coreLocalizer,
                t: _t,
                localizer: _mainLocalizer,
+               coreLocations: coreLocations,
+               locationManager: _mainLocations,
                prefs: corePreferences,
                coreTree: coreTree,
                coreUploader: coreUploader,
                serviceMapillary: serviceMapillary,
                serviceMapRules: serviceMapRules,
                serviceNominatim: serviceNominatim,
-               serviceOpenstreetcam: serviceOpenstreetcam,
+               serviceNsi: serviceNsi,
+               serviceKartaview: serviceKartaview,
                serviceOsm: serviceOsm,
                serviceOsmWikibase: serviceOsmWikibase,
                serviceStreetside: serviceStreetside,
                svgMidpoints: svgMidpoints,
                svgNotes: svgNotes,
                svgMarkerSegments: svgMarkerSegments,
-               svgOpenstreetcamImages: svgOpenstreetcamImages,
+               svgKartaviewImages: svgKartaviewImages,
                svgOsm: svgOsm,
                svgPassiveVertex: svgPassiveVertex,
                svgPath: svgPath,
                uiFieldCycleway: uiFieldCycleway,
                uiFieldLanes: uiFieldLanes,
                uiFieldLocalized: uiFieldLocalized,
-               uiFieldMaxspeed: uiFieldMaxspeed,
+               uiFieldRoadheight: uiFieldRoadheight,
+               uiFieldRoadspeed: uiFieldRoadspeed,
                uiFieldStructureRadio: uiFieldRadio,
                uiFieldRadio: uiFieldRadio,
                uiFieldRestrictions: uiFieldRestrictions,
                utilDisplayLabel: utilDisplayLabel,
                utilEntityRoot: utilEntityRoot,
                utilEditDistance: utilEditDistance,
-               utilEntitySelector: utilEntitySelector,
+               utilEntityAndDeepMemberIDs: utilEntityAndDeepMemberIDs,
                utilEntityOrMemberSelector: utilEntityOrMemberSelector,
                utilEntityOrDeepMemberSelector: utilEntityOrDeepMemberSelector,
+               utilEntitySelector: utilEntitySelector,
                utilFastMouse: utilFastMouse,
                utilFunctor: utilFunctor,
                utilGetAllNodes: utilGetAllNodes,
                utilKeybinding: utilKeybinding,
                utilNoAuto: utilNoAuto,
                utilObjectOmit: utilObjectOmit,
+               utilCompareIDs: utilCompareIDs,
+               utilOldestID: utilOldestID,
                utilPrefixCSSProperty: utilPrefixCSSProperty,
                utilPrefixDOMProperty: utilPrefixDOMProperty,
                utilQsString: utilQsString,